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alistair23-linux
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Merge branch 'for-4.11/next' into for-4.11/linus-merge 

Signed-off-by: Jens Axboe <axboe@fb.com>
hifive-unleashed-5.1
Jens Axboe 2017-02-17 14:08:19 -07:00
parent 6010720da8 7520872c0c
commit 818551e2b2
171 changed files with 2500 additions and 2856 deletions
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5
block/Kconfig
View File

@ -49,9 +49,13 @@ config LBDAF
If unsure, say Y.
config BLK_SCSI_REQUEST
bool
config BLK_DEV_BSG
bool "Block layer SG support v4"
default y
select BLK_SCSI_REQUEST
help
Saying Y here will enable generic SG (SCSI generic) v4 support
for any block device.
@ -71,6 +75,7 @@ config BLK_DEV_BSGLIB
bool "Block layer SG support v4 helper lib"
default n
select BLK_DEV_BSG
select BLK_SCSI_REQUEST
help
Subsystems will normally enable this if needed. Users will not
normally need to manually enable this.

5
block/Makefile
View File

@ -7,10 +7,11 @@ obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-tag.o blk-sysfs.o \
blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \
blk-lib.o blk-mq.o blk-mq-tag.o blk-stat.o \
blk-mq-sysfs.o blk-mq-cpumap.o blk-mq-sched.o ioctl.o \
genhd.o scsi_ioctl.o partition-generic.o ioprio.o \
genhd.o partition-generic.o ioprio.o \
badblocks.o partitions/
obj-$(CONFIG_BOUNCE) += bounce.o
obj-$(CONFIG_BOUNCE) += bounce.o
obj-$(CONFIG_BLK_SCSI_REQUEST) += scsi_ioctl.o
obj-$(CONFIG_BLK_DEV_BSG) += bsg.o
obj-$(CONFIG_BLK_DEV_BSGLIB) += bsg-lib.o
obj-$(CONFIG_BLK_CGROUP) += blk-cgroup.o

10
block/bio.c
View File

@ -1227,9 +1227,6 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
if (!bio)
goto out_bmd;
if (iter->type & WRITE)
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
ret = 0;
if (map_data) {
@ -1394,12 +1391,6 @@ struct bio *bio_map_user_iov(struct request_queue *q,
kfree(pages);
/*
* set data direction, and check if mapped pages need bouncing
*/
if (iter->type & WRITE)
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
bio_set_flag(bio, BIO_USER_MAPPED);
/*
@ -1590,7 +1581,6 @@ struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len,
bio->bi_private = data;
} else {
bio->bi_end_io = bio_copy_kern_endio;
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
}
return bio;

10
block/blk-cgroup.c
View File

@ -184,7 +184,7 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
goto err_free_blkg;
}
wb_congested = wb_congested_get_create(&q->backing_dev_info,
wb_congested = wb_congested_get_create(q->backing_dev_info,
blkcg->css.id,
GFP_NOWAIT | __GFP_NOWARN);
if (!wb_congested) {
@ -469,8 +469,8 @@ static int blkcg_reset_stats(struct cgroup_subsys_state *css,
const char *blkg_dev_name(struct blkcg_gq *blkg)
{
/* some drivers (floppy) instantiate a queue w/o disk registered */
if (blkg->q->backing_dev_info.dev)
return dev_name(blkg->q->backing_dev_info.dev);
if (blkg->q->backing_dev_info->dev)
return dev_name(blkg->q->backing_dev_info->dev);
return NULL;
}
EXPORT_SYMBOL_GPL(blkg_dev_name);
@ -1079,10 +1079,8 @@ int blkcg_init_queue(struct request_queue *q)
if (preloaded)
radix_tree_preload_end();
if (IS_ERR(blkg)) {
blkg_free(new_blkg);
if (IS_ERR(blkg))
return PTR_ERR(blkg);
}
q->root_blkg = blkg;
q->root_rl.blkg = blkg;

327
block/blk-core.c
View File

@ -33,6 +33,7 @@
#include <linux/ratelimit.h>
#include <linux/pm_runtime.h>
#include <linux/blk-cgroup.h>
#include <linux/debugfs.h>
#define CREATE_TRACE_POINTS
#include <trace/events/block.h>
@ -42,6 +43,10 @@
#include "blk-mq-sched.h"
#include "blk-wbt.h"
#ifdef CONFIG_DEBUG_FS
struct dentry *blk_debugfs_root;
#endif
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_rq_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_complete);
@ -75,7 +80,7 @@ static void blk_clear_congested(struct request_list *rl, int sync)
* flip its congestion state for events on other blkcgs.
*/
if (rl == &rl->q->root_rl)
clear_wb_congested(rl->q->backing_dev_info.wb.congested, sync);
clear_wb_congested(rl->q->backing_dev_info->wb.congested, sync);
#endif
}
@ -86,7 +91,7 @@ static void blk_set_congested(struct request_list *rl, int sync)
#else
/* see blk_clear_congested() */
if (rl == &rl->q->root_rl)
set_wb_congested(rl->q->backing_dev_info.wb.congested, sync);
set_wb_congested(rl->q->backing_dev_info->wb.congested, sync);
#endif
}
@ -105,22 +110,6 @@ void blk_queue_congestion_threshold(struct request_queue *q)
q->nr_congestion_off = nr;
}
/**
* blk_get_backing_dev_info - get the address of a queue's backing_dev_info
* @bdev: device
*
* Locates the passed device's request queue and returns the address of its
* backing_dev_info. This function can only be called if @bdev is opened
* and the return value is never NULL.
*/
struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
{
struct request_queue *q = bdev_get_queue(bdev);
return &q->backing_dev_info;
}
EXPORT_SYMBOL(blk_get_backing_dev_info);
void blk_rq_init(struct request_queue *q, struct request *rq)
{
memset(rq, 0, sizeof(*rq));
@ -132,8 +121,6 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
rq->__sector = (sector_t) -1;
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
rq->cmd = rq->__cmd;
rq->cmd_len = BLK_MAX_CDB;
rq->tag = -1;
rq->internal_tag = -1;
rq->start_time = jiffies;
@ -160,10 +147,8 @@ static void req_bio_endio(struct request *rq, struct bio *bio,
void blk_dump_rq_flags(struct request *rq, char *msg)
{
int bit;
printk(KERN_INFO "%s: dev %s: type=%x, flags=%llx\n", msg,
rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->cmd_type,
printk(KERN_INFO "%s: dev %s: flags=%llx\n", msg,
rq->rq_disk ? rq->rq_disk->disk_name : "?",
(unsigned long long) rq->cmd_flags);
printk(KERN_INFO " sector %llu, nr/cnr %u/%u\n",
@ -171,13 +156,6 @@ void blk_dump_rq_flags(struct request *rq, char *msg)
blk_rq_sectors(rq), blk_rq_cur_sectors(rq));
printk(KERN_INFO " bio %p, biotail %p, len %u\n",
rq->bio, rq->biotail, blk_rq_bytes(rq));
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
printk(KERN_INFO " cdb: ");
for (bit = 0; bit < BLK_MAX_CDB; bit++)
printk("%02x ", rq->cmd[bit]);
printk("\n");
}
}
EXPORT_SYMBOL(blk_dump_rq_flags);
@ -588,7 +566,7 @@ void blk_cleanup_queue(struct request_queue *q)
blk_flush_integrity();
/* @q won't process any more request, flush async actions */
del_timer_sync(&q->backing_dev_info.laptop_mode_wb_timer);
del_timer_sync(&q->backing_dev_info->laptop_mode_wb_timer);
blk_sync_queue(q);
if (q->mq_ops)
@ -600,7 +578,8 @@ void blk_cleanup_queue(struct request_queue *q)
q->queue_lock = &q->__queue_lock;
spin_unlock_irq(lock);
bdi_unregister(&q->backing_dev_info);
bdi_unregister(q->backing_dev_info);
put_disk_devt(q->disk_devt);
/* @q is and will stay empty, shutdown and put */
blk_put_queue(q);
@ -608,17 +587,41 @@ void blk_cleanup_queue(struct request_queue *q)
EXPORT_SYMBOL(blk_cleanup_queue);
/* Allocate memory local to the request queue */
static void *alloc_request_struct(gfp_t gfp_mask, void *data)
static void *alloc_request_simple(gfp_t gfp_mask, void *data)
{
int nid = (int)(long)data;
return kmem_cache_alloc_node(request_cachep, gfp_mask, nid);
struct request_queue *q = data;
return kmem_cache_alloc_node(request_cachep, gfp_mask, q->node);
}
static void free_request_struct(void *element, void *unused)
static void free_request_simple(void *element, void *data)
{
kmem_cache_free(request_cachep, element);
}
static void *alloc_request_size(gfp_t gfp_mask, void *data)
{
struct request_queue *q = data;
struct request *rq;
rq = kmalloc_node(sizeof(struct request) + q->cmd_size, gfp_mask,
q->node);
if (rq && q->init_rq_fn && q->init_rq_fn(q, rq, gfp_mask) < 0) {
kfree(rq);
rq = NULL;
}
return rq;
}
static void free_request_size(void *element, void *data)
{
struct request_queue *q = data;
if (q->exit_rq_fn)
q->exit_rq_fn(q, element);
kfree(element);
}
int blk_init_rl(struct request_list *rl, struct request_queue *q,
gfp_t gfp_mask)
{
@ -631,10 +634,15 @@ int blk_init_rl(struct request_list *rl, struct request_queue *q,
init_waitqueue_head(&rl->wait[BLK_RW_SYNC]);
init_waitqueue_head(&rl->wait[BLK_RW_ASYNC]);
rl->rq_pool = mempool_create_node(BLKDEV_MIN_RQ, alloc_request_struct,
free_request_struct,
(void *)(long)q->node, gfp_mask,
q->node);
if (q->cmd_size) {
rl->rq_pool = mempool_create_node(BLKDEV_MIN_RQ,
alloc_request_size, free_request_size,
q, gfp_mask, q->node);
} else {
rl->rq_pool = mempool_create_node(BLKDEV_MIN_RQ,
alloc_request_simple, free_request_simple,
q, gfp_mask, q->node);
}
if (!rl->rq_pool)
return -ENOMEM;
@ -697,7 +705,6 @@ static void blk_rq_timed_out_timer(unsigned long data)
struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
{
struct request_queue *q;
int err;
q = kmem_cache_alloc_node(blk_requestq_cachep,
gfp_mask | __GFP_ZERO, node_id);
@ -712,17 +719,17 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
if (!q->bio_split)
goto fail_id;
q->backing_dev_info.ra_pages =
(VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
q->backing_dev_info.capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->backing_dev_info.name = "block";
q->node = node_id;
err = bdi_init(&q->backing_dev_info);
if (err)
q->backing_dev_info = bdi_alloc_node(gfp_mask, node_id);
if (!q->backing_dev_info)
goto fail_split;
setup_timer(&q->backing_dev_info.laptop_mode_wb_timer,
q->backing_dev_info->ra_pages =
(VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->backing_dev_info->name = "block";
q->node = node_id;
setup_timer(&q->backing_dev_info->laptop_mode_wb_timer,
laptop_mode_timer_fn, (unsigned long) q);
setup_timer(&q->timeout, blk_rq_timed_out_timer, (unsigned long) q);
INIT_LIST_HEAD(&q->queue_head);
@ -772,7 +779,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
fail_ref:
percpu_ref_exit(&q->q_usage_counter);
fail_bdi:
bdi_destroy(&q->backing_dev_info);
bdi_put(q->backing_dev_info);
fail_split:
bioset_free(q->bio_split);
fail_id:
@ -825,15 +832,19 @@ EXPORT_SYMBOL(blk_init_queue);
struct request_queue *
blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
{
struct request_queue *uninit_q, *q;
struct request_queue *q;
uninit_q = blk_alloc_queue_node(GFP_KERNEL, node_id);
if (!uninit_q)
q = blk_alloc_queue_node(GFP_KERNEL, node_id);
if (!q)
return NULL;
q = blk_init_allocated_queue(uninit_q, rfn, lock);
if (!q)
blk_cleanup_queue(uninit_q);
q->request_fn = rfn;
if (lock)
q->queue_lock = lock;
if (blk_init_allocated_queue(q) < 0) {
blk_cleanup_queue(q);
return NULL;
}
return q;
}
@ -841,30 +852,22 @@ EXPORT_SYMBOL(blk_init_queue_node);
static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio);
struct request_queue *
blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
spinlock_t *lock)
{
if (!q)
return NULL;
q->fq = blk_alloc_flush_queue(q, NUMA_NO_NODE, 0);
int blk_init_allocated_queue(struct request_queue *q)
{
q->fq = blk_alloc_flush_queue(q, NUMA_NO_NODE, q->cmd_size);
if (!q->fq)
return NULL;
return -ENOMEM;
if (q->init_rq_fn && q->init_rq_fn(q, q->fq->flush_rq, GFP_KERNEL))
goto out_free_flush_queue;
if (blk_init_rl(&q->root_rl, q, GFP_KERNEL))
goto fail;
goto out_exit_flush_rq;
INIT_WORK(&q->timeout_work, blk_timeout_work);
q->request_fn = rfn;
q->prep_rq_fn = NULL;
q->unprep_rq_fn = NULL;
q->queue_flags |= QUEUE_FLAG_DEFAULT;
/* Override internal queue lock with supplied lock pointer */
if (lock)
q->queue_lock = lock;
/*
* This also sets hw/phys segments, boundary and size
*/
@ -878,17 +881,19 @@ blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
/* init elevator */
if (elevator_init(q, NULL)) {
mutex_unlock(&q->sysfs_lock);
goto fail;
goto out_exit_flush_rq;
}
mutex_unlock(&q->sysfs_lock);
return 0;
return q;
fail:
out_exit_flush_rq:
if (q->exit_rq_fn)
q->exit_rq_fn(q, q->fq->flush_rq);
out_free_flush_queue:
blk_free_flush_queue(q->fq);
wbt_exit(q);
return NULL;
return -ENOMEM;
}
EXPORT_SYMBOL(blk_init_allocated_queue);
@ -1024,25 +1029,6 @@ int blk_update_nr_requests(struct request_queue *q, unsigned int nr)
return 0;
}
/*
* Determine if elevator data should be initialized when allocating the
* request associated with @bio.
*/
static bool blk_rq_should_init_elevator(struct bio *bio)
{
if (!bio)
return true;
/*
* Flush requests do not use the elevator so skip initialization.
* This allows a request to share the flush and elevator data.
*/
if (op_is_flush(bio->bi_opf))
return false;
return true;
}
/**
* __get_request - get a free request
* @rl: request list to allocate from
@ -1121,10 +1107,13 @@ static struct request *__get_request(struct request_list *rl, unsigned int op,
* request is freed. This guarantees icq's won't be destroyed and
* makes creating new ones safe.
*
* Flush requests do not use the elevator so skip initialization.
* This allows a request to share the flush and elevator data.
*
* Also, lookup icq while holding queue_lock. If it doesn't exist,
* it will be created after releasing queue_lock.
*/
if (blk_rq_should_init_elevator(bio) && !blk_queue_bypass(q)) {
if (!op_is_flush(op) && !blk_queue_bypass(q)) {
rq_flags |= RQF_ELVPRIV;
q->nr_rqs_elvpriv++;
if (et->icq_cache && ioc)
@ -1184,7 +1173,7 @@ fail_elvpriv:
* disturb iosched and blkcg but weird is bettern than dead.
*/
printk_ratelimited(KERN_WARNING "%s: dev %s: request aux data allocation failed, iosched may be disturbed\n",
__func__, dev_name(q->backing_dev_info.dev));
__func__, dev_name(q->backing_dev_info->dev));
rq->rq_flags &= ~RQF_ELVPRIV;
rq->elv.icq = NULL;
@ -1278,8 +1267,6 @@ static struct request *blk_old_get_request(struct request_queue *q, int rw,
{
struct request *rq;
BUG_ON(rw != READ && rw != WRITE);
/* create ioc upfront */
create_io_context(gfp_mask, q->node);
@ -1308,18 +1295,6 @@ struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
}
EXPORT_SYMBOL(blk_get_request);
/**
* blk_rq_set_block_pc - initialize a request to type BLOCK_PC
* @rq: request to be initialized
*
*/
void blk_rq_set_block_pc(struct request *rq)
{
rq->cmd_type = REQ_TYPE_BLOCK_PC;
memset(rq->__cmd, 0, sizeof(rq->__cmd));
}
EXPORT_SYMBOL(blk_rq_set_block_pc);
/**
* blk_requeue_request - put a request back on queue
* @q: request queue where request should be inserted
@ -1510,6 +1485,30 @@ bool bio_attempt_front_merge(struct request_queue *q, struct request *req,
return true;
}
bool bio_attempt_discard_merge(struct request_queue *q, struct request *req,
struct bio *bio)
{
unsigned short segments = blk_rq_nr_discard_segments(req);
if (segments >= queue_max_discard_segments(q))
goto no_merge;
if (blk_rq_sectors(req) + bio_sectors(bio) >
blk_rq_get_max_sectors(req, blk_rq_pos(req)))
goto no_merge;
req->biotail->bi_next = bio;
req->biotail = bio;
req->__data_len += bio->bi_iter.bi_size;
req->ioprio = ioprio_best(req->ioprio, bio_prio(bio));
req->nr_phys_segments = segments + 1;
blk_account_io_start(req, false);
return true;
no_merge:
req_set_nomerge(q, req);
return false;
}
/**
* blk_attempt_plug_merge - try to merge with %current's plugged list
* @q: request_queue new bio is being queued at
@ -1538,12 +1537,11 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
{
struct blk_plug *plug;
struct request *rq;
bool ret = false;
struct list_head *plug_list;
plug = current->plug;
if (!plug)
goto out;
return false;
*request_count = 0;
if (q->mq_ops)
@ -1552,7 +1550,7 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
plug_list = &plug->list;
list_for_each_entry_reverse(rq, plug_list, queuelist) {
int el_ret;
bool merged = false;
if (rq->q == q) {
(*request_count)++;
@ -1568,19 +1566,25 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
if (rq->q != q || !blk_rq_merge_ok(rq, bio))
continue;
el_ret = blk_try_merge(rq, bio);
if (el_ret == ELEVATOR_BACK_MERGE) {
ret = bio_attempt_back_merge(q, rq, bio);
if (ret)
break;
} else if (el_ret == ELEVATOR_FRONT_MERGE) {
ret = bio_attempt_front_merge(q, rq, bio);
if (ret)
break;
switch (blk_try_merge(rq, bio)) {
case ELEVATOR_BACK_MERGE:
merged = bio_attempt_back_merge(q, rq, bio);
break;
case ELEVATOR_FRONT_MERGE:
merged = bio_attempt_front_merge(q, rq, bio);
break;
case ELEVATOR_DISCARD_MERGE:
merged = bio_attempt_discard_merge(q, rq, bio);
break;
default:
break;
}
if (merged)
return true;
}
out:
return ret;
return false;
}
unsigned int blk_plug_queued_count(struct request_queue *q)
@ -1609,7 +1613,6 @@ out:
void init_request_from_bio(struct request *req, struct bio *bio)
{
req->cmd_type = REQ_TYPE_FS;
if (bio->bi_opf & REQ_RAHEAD)
req->cmd_flags |= REQ_FAILFAST_MASK;
@ -1623,8 +1626,8 @@ void init_request_from_bio(struct request *req, struct bio *bio)
static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
{
struct blk_plug *plug;
int el_ret, where = ELEVATOR_INSERT_SORT;
struct request *req;
int where = ELEVATOR_INSERT_SORT;
struct request *req, *free;
unsigned int request_count = 0;
unsigned int wb_acct;
@ -1661,21 +1664,29 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
spin_lock_irq(q->queue_lock);
el_ret = elv_merge(q, &req, bio);
if (el_ret == ELEVATOR_BACK_MERGE) {
if (bio_attempt_back_merge(q, req, bio)) {
elv_bio_merged(q, req, bio);
if (!attempt_back_merge(q, req))
elv_merged_request(q, req, el_ret);
goto out_unlock;
}
} else if (el_ret == ELEVATOR_FRONT_MERGE) {
if (bio_attempt_front_merge(q, req, bio)) {
elv_bio_merged(q, req, bio);
if (!attempt_front_merge(q, req))
elv_merged_request(q, req, el_ret);
goto out_unlock;
}
switch (elv_merge(q, &req, bio)) {
case ELEVATOR_BACK_MERGE:
if (!bio_attempt_back_merge(q, req, bio))
break;
elv_bio_merged(q, req, bio);
free = attempt_back_merge(q, req);
if (free)
__blk_put_request(q, free);
else
elv_merged_request(q, req, ELEVATOR_BACK_MERGE);
goto out_unlock;
case ELEVATOR_FRONT_MERGE:
if (!bio_attempt_front_merge(q, req, bio))
break;
elv_bio_merged(q, req, bio);
free = attempt_front_merge(q, req);
if (free)
__blk_put_request(q, free);
else
elv_merged_request(q, req, ELEVATOR_FRONT_MERGE);
goto out_unlock;
default:
break;
}
get_rq:
@ -2452,14 +2463,6 @@ void blk_start_request(struct request *req)
wbt_issue(req->q->rq_wb, &req->issue_stat);
}
/*
* We are now handing the request to the hardware, initialize
* resid_len to full count and add the timeout handler.
*/
req->resid_len = blk_rq_bytes(req);
if (unlikely(blk_bidi_rq(req)))
req->next_rq->resid_len = blk_rq_bytes(req->next_rq);
BUG_ON(test_bit(REQ_ATOM_COMPLETE, &req->atomic_flags));
blk_add_timer(req);
}
@ -2530,10 +2533,10 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
* TODO: tj: This is too subtle. It would be better to let
* low level drivers do what they see fit.
*/
if (req->cmd_type == REQ_TYPE_FS)
if (!blk_rq_is_passthrough(req))
req->errors = 0;
if (error && req->cmd_type == REQ_TYPE_FS &&
if (error && !blk_rq_is_passthrough(req) &&
!(req->rq_flags & RQF_QUIET)) {
char *error_type;
@ -2605,7 +2608,7 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
req->__data_len -= total_bytes;
/* update sector only for requests with clear definition of sector */
if (req->cmd_type == REQ_TYPE_FS)
if (!blk_rq_is_passthrough(req))
req->__sector += total_bytes >> 9;
/* mixed attributes always follow the first bio */
@ -2683,8 +2686,8 @@ void blk_finish_request(struct request *req, int error)
BUG_ON(blk_queued_rq(req));
if (unlikely(laptop_mode) && req->cmd_type == REQ_TYPE_FS)
laptop_io_completion(&req->q->backing_dev_info);
if (unlikely(laptop_mode) && !blk_rq_is_passthrough(req))
laptop_io_completion(req->q->backing_dev_info);
blk_delete_timer(req);
@ -3007,8 +3010,6 @@ EXPORT_SYMBOL_GPL(blk_rq_unprep_clone);
static void __blk_rq_prep_clone(struct request *dst, struct request *src)
{
dst->cpu = src->cpu;
dst->cmd_flags = src->cmd_flags | REQ_NOMERGE;
dst->cmd_type = src->cmd_type;
dst->__sector = blk_rq_pos(src);
dst->__data_len = blk_rq_bytes(src);
dst->nr_phys_segments = src->nr_phys_segments;
@ -3484,5 +3485,9 @@ int __init blk_dev_init(void)
blk_requestq_cachep = kmem_cache_create("request_queue",
sizeof(struct request_queue), 0, SLAB_PANIC, NULL);
#ifdef CONFIG_DEBUG_FS
blk_debugfs_root = debugfs_create_dir("block", NULL);
#endif
return 0;
}

19
block/blk-exec.c
View File

@ -11,11 +11,6 @@
#include "blk.h"
#include "blk-mq-sched.h"
/*
* for max sense size
*/
#include <scsi/scsi_cmnd.h>
/**
* blk_end_sync_rq - executes a completion event on a request
* @rq: request to complete
@ -56,7 +51,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
WARN_ON(irqs_disabled());
WARN_ON(rq->cmd_type == REQ_TYPE_FS);
WARN_ON(!blk_rq_is_passthrough(rq));
rq->rq_disk = bd_disk;
rq->end_io = done;
@ -101,16 +96,9 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
char sense[SCSI_SENSE_BUFFERSIZE];
int err = 0;
unsigned long hang_check;
if (!rq->sense) {
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
}
rq->end_io_data = &wait;
blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
@ -124,11 +112,6 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
if (rq->errors)
err = -EIO;
if (rq->sense == sense) {
rq->sense = NULL;
rq->sense_len = 0;
}
return err;
}
EXPORT_SYMBOL(blk_execute_rq);

14
block/blk-flush.c
View File

@ -297,8 +297,14 @@ static bool blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq)
if (fq->flush_pending_idx != fq->flush_running_idx || list_empty(pending))
return false;
/* C2 and C3 */
/* C2 and C3
*
* For blk-mq + scheduling, we can risk having all driver tags
* assigned to empty flushes, and we deadlock if we are expecting
* other requests to make progress. Don't defer for that case.
*/
if (!list_empty(&fq->flush_data_in_flight) &&
!(q->mq_ops && q->elevator) &&
time_before(jiffies,
fq->flush_pending_since + FLUSH_PENDING_TIMEOUT))
return false;
@ -327,7 +333,6 @@ static bool blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq)
blk_mq_tag_set_rq(hctx, first_rq->tag, flush_rq);
}
flush_rq->cmd_type = REQ_TYPE_FS;
flush_rq->cmd_flags = REQ_OP_FLUSH | REQ_PREFLUSH;
flush_rq->rq_flags |= RQF_FLUSH_SEQ;
flush_rq->rq_disk = first_rq->rq_disk;
@ -547,11 +552,10 @@ struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
if (!fq)
goto fail;
if (q->mq_ops) {
if (q->mq_ops)
spin_lock_init(&fq->mq_flush_lock);
rq_sz = round_up(rq_sz + cmd_size, cache_line_size());
}
rq_sz = round_up(rq_sz + cmd_size, cache_line_size());
fq->flush_rq = kzalloc_node(rq_sz, GFP_KERNEL, node);
if (!fq->flush_rq)
goto fail_rq;

4
block/blk-integrity.c
View File

@ -443,10 +443,10 @@ void blk_integrity_revalidate(struct gendisk *disk)
return;
if (bi->profile)
disk->queue->backing_dev_info.capabilities |=
disk->queue->backing_dev_info->capabilities |=
BDI_CAP_STABLE_WRITES;
else
disk->queue->backing_dev_info.capabilities &=
disk->queue->backing_dev_info->capabilities &=
~BDI_CAP_STABLE_WRITES;
}

22
block/blk-ioc.c
View File

@ -35,7 +35,10 @@ static void icq_free_icq_rcu(struct rcu_head *head)
kmem_cache_free(icq->__rcu_icq_cache, icq);
}
/* Exit an icq. Called with both ioc and q locked. */
/*
* Exit an icq. Called with both ioc and q locked for sq, only ioc locked for
* mq.
*/
static void ioc_exit_icq(struct io_cq *icq)
{
struct elevator_type *et = icq->q->elevator->type;
@ -166,6 +169,7 @@ EXPORT_SYMBOL(put_io_context);
*/
void put_io_context_active(struct io_context *ioc)
{
struct elevator_type *et;
unsigned long flags;
struct io_cq *icq;
@ -184,13 +188,19 @@ retry:
hlist_for_each_entry(icq, &ioc->icq_list, ioc_node) {
if (icq->flags & ICQ_EXITED)
continue;
if (spin_trylock(icq->q->queue_lock)) {
et = icq->q->elevator->type;
if (et->uses_mq) {
ioc_exit_icq(icq);
spin_unlock(icq->q->queue_lock);
} else {
spin_unlock_irqrestore(&ioc->lock, flags);
cpu_relax();
goto retry;
if (spin_trylock(icq->q->queue_lock)) {
ioc_exit_icq(icq);
spin_unlock(icq->q->queue_lock);
} else {
spin_unlock_irqrestore(&ioc->lock, flags);
cpu_relax();
goto retry;
}
}
}
spin_unlock_irqrestore(&ioc->lock, flags);

13
block/blk-map.c
View File

@ -16,8 +16,6 @@
int blk_rq_append_bio(struct request *rq, struct bio *bio)
{
if (!rq->bio) {
rq->cmd_flags &= REQ_OP_MASK;
rq->cmd_flags |= (bio->bi_opf & REQ_OP_MASK);
blk_rq_bio_prep(rq->q, rq, bio);
} else {
if (!ll_back_merge_fn(rq->q, rq, bio))
@ -62,6 +60,9 @@ static int __blk_rq_map_user_iov(struct request *rq,
if (IS_ERR(bio))
return PTR_ERR(bio);
bio->bi_opf &= ~REQ_OP_MASK;
bio->bi_opf |= req_op(rq);
if (map_data && map_data->null_mapped)
bio_set_flag(bio, BIO_NULL_MAPPED);
@ -90,7 +91,7 @@ static int __blk_rq_map_user_iov(struct request *rq,
}
/**
* blk_rq_map_user_iov - map user data to a request, for REQ_TYPE_BLOCK_PC usage
* blk_rq_map_user_iov - map user data to a request, for passthrough requests
* @q: request queue where request should be inserted
* @rq: request to map data to
* @map_data: pointer to the rq_map_data holding pages (if necessary)
@ -199,7 +200,7 @@ int blk_rq_unmap_user(struct bio *bio)
EXPORT_SYMBOL(blk_rq_unmap_user);
/**
* blk_rq_map_kern - map kernel data to a request, for REQ_TYPE_BLOCK_PC usage
* blk_rq_map_kern - map kernel data to a request, for passthrough requests
* @q: request queue where request should be inserted
* @rq: request to fill
* @kbuf: the kernel buffer
@ -234,8 +235,8 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
if (IS_ERR(bio))
return PTR_ERR(bio);
if (!reading)
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
bio->bi_opf &= ~REQ_OP_MASK;
bio->bi_opf |= req_op(rq);
if (do_copy)
rq->rq_flags |= RQF_COPY_USER;

58
block/blk-merge.c
View File

@ -482,13 +482,6 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
}
EXPORT_SYMBOL(blk_rq_map_sg);
static void req_set_nomerge(struct request_queue *q, struct request *req)
{
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
}
static inline int ll_new_hw_segment(struct request_queue *q,
struct request *req,
struct bio *bio)
@ -659,31 +652,32 @@ static void blk_account_io_merge(struct request *req)
}
/*
* Has to be called with the request spinlock acquired
* For non-mq, this has to be called with the request spinlock acquired.
* For mq with scheduling, the appropriate queue wide lock should be held.
*/
static int attempt_merge(struct request_queue *q, struct request *req,
struct request *next)
static struct request *attempt_merge(struct request_queue *q,
struct request *req, struct request *next)
{
if (!rq_mergeable(req) || !rq_mergeable(next))
return 0;
return NULL;
if (req_op(req) != req_op(next))
return 0;
return NULL;
/*
* not contiguous
*/
if (blk_rq_pos(req) + blk_rq_sectors(req) != blk_rq_pos(next))
return 0;
return NULL;
if (rq_data_dir(req) != rq_data_dir(next)
|| req->rq_disk != next->rq_disk
|| req_no_special_merge(next))
return 0;
return NULL;
if (req_op(req) == REQ_OP_WRITE_SAME &&
!blk_write_same_mergeable(req->bio, next->bio))
return 0;
return NULL;
/*
* If we are allowed to merge, then append bio list
@ -692,7 +686,7 @@ static int attempt_merge(struct request_queue *q, struct request *req,
* counts here.
*/
if (!ll_merge_requests_fn(q, req, next))
return 0;
return NULL;
/*
* If failfast settings disagree or any of the two is already
@ -732,42 +726,51 @@ static int attempt_merge(struct request_queue *q, struct request *req,
if (blk_rq_cpu_valid(next))
req->cpu = next->cpu;
/* owner-ship of bio passed from next to req */
/*
* ownership of bio passed from next to req, return 'next' for
* the caller to free
*/
next->bio = NULL;
__blk_put_request(q, next);
return 1;
return next;
}
int attempt_back_merge(struct request_queue *q, struct request *rq)
struct request *attempt_back_merge(struct request_queue *q, struct request *rq)
{
struct request *next = elv_latter_request(q, rq);
if (next)
return attempt_merge(q, rq, next);
return 0;
return NULL;
}
int attempt_front_merge(struct request_queue *q, struct request *rq)
struct request *attempt_front_merge(struct request_queue *q, struct request *rq)
{
struct request *prev = elv_former_request(q, rq);
if (prev)
return attempt_merge(q, prev, rq);
return 0;
return NULL;
}
int blk_attempt_req_merge(struct request_queue *q, struct request *rq,
struct request *next)
{
struct elevator_queue *e = q->elevator;
struct request *free;
if (!e->uses_mq && e->type->ops.sq.elevator_allow_rq_merge_fn)
if (!e->type->ops.sq.elevator_allow_rq_merge_fn(q, rq, next))
return 0;
return attempt_merge(q, rq, next);
free = attempt_merge(q, rq, next);
if (free) {
__blk_put_request(q, free);
return 1;
}
return 0;
}
bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
@ -798,9 +801,12 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
return true;
}
int blk_try_merge(struct request *rq, struct bio *bio)
enum elv_merge blk_try_merge(struct request *rq, struct bio *bio)
{
if (blk_rq_pos(rq) + blk_rq_sectors(rq) == bio->bi_iter.bi_sector)
if (req_op(rq) == REQ_OP_DISCARD &&
queue_max_discard_segments(rq->q) > 1)
return ELEVATOR_DISCARD_MERGE;
else if (blk_rq_pos(rq) + blk_rq_sectors(rq) == bio->bi_iter.bi_sector)
return ELEVATOR_BACK_MERGE;
else if (blk_rq_pos(rq) - bio_sectors(bio) == bio->bi_iter.bi_sector)
return ELEVATOR_FRONT_MERGE;

88
block/blk-mq-debugfs.c
View File

@ -19,6 +19,7 @@
#include <linux/debugfs.h>
#include <linux/blk-mq.h>
#include "blk.h"
#include "blk-mq.h"
#include "blk-mq-tag.h"
@ -28,8 +29,6 @@ struct blk_mq_debugfs_attr {
const struct file_operations *fops;
};
static struct dentry *block_debugfs_root;
static int blk_mq_debugfs_seq_open(struct inode *inode, struct file *file,
const struct seq_operations *ops)
{
@ -88,13 +87,14 @@ static int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
{
struct request *rq = list_entry_rq(v);
seq_printf(m, "%p {.cmd_type=%u, .cmd_flags=0x%x, .rq_flags=0x%x, .tag=%d, .internal_tag=%d}\n",
rq, rq->cmd_type, rq->cmd_flags, (unsigned int)rq->rq_flags,
seq_printf(m, "%p {.cmd_flags=0x%x, .rq_flags=0x%x, .tag=%d, .internal_tag=%d}\n",
rq, rq->cmd_flags, (__force unsigned int)rq->rq_flags,
rq->tag, rq->internal_tag);
return 0;
}
static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos)
__acquires(&hctx->lock)
{
struct blk_mq_hw_ctx *hctx = m->private;
@ -110,6 +110,7 @@ static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos)
}
static void hctx_dispatch_stop(struct seq_file *m, void *v)
__releases(&hctx->lock)
{
struct blk_mq_hw_ctx *hctx = m->private;
@ -176,13 +177,17 @@ static int hctx_tags_show(struct seq_file *m, void *v)
{
struct blk_mq_hw_ctx *hctx = m->private;
struct request_queue *q = hctx->queue;
int res;
mutex_lock(&q->sysfs_lock);
res = mutex_lock_interruptible(&q->sysfs_lock);
if (res)
goto out;
if (hctx->tags)
blk_mq_debugfs_tags_show(m, hctx->tags);
mutex_unlock(&q->sysfs_lock);
return 0;
out:
return res;
}
static int hctx_tags_open(struct inode *inode, struct file *file)
@ -201,12 +206,17 @@ static int hctx_tags_bitmap_show(struct seq_file *m, void *v)
{
struct blk_mq_hw_ctx *hctx = m->private;
struct request_queue *q = hctx->queue;
int res;
mutex_lock(&q->sysfs_lock);
res = mutex_lock_interruptible(&q->sysfs_lock);
if (res)
goto out;
if (hctx->tags)
sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m);
mutex_unlock(&q->sysfs_lock);
return 0;
out:
return res;
}
static int hctx_tags_bitmap_open(struct inode *inode, struct file *file)
@ -225,13 +235,17 @@ static int hctx_sched_tags_show(struct seq_file *m, void *v)
{
struct blk_mq_hw_ctx *hctx = m->private;
struct request_queue *q = hctx->queue;
int res;
mutex_lock(&q->sysfs_lock);
res = mutex_lock_interruptible(&q->sysfs_lock);
if (res)
goto out;
if (hctx->sched_tags)
blk_mq_debugfs_tags_show(m, hctx->sched_tags);
mutex_unlock(&q->sysfs_lock);
return 0;
out:
return res;
}
static int hctx_sched_tags_open(struct inode *inode, struct file *file)
@ -250,12 +264,17 @@ static int hctx_sched_tags_bitmap_show(struct seq_file *m, void *v)
{
struct blk_mq_hw_ctx *hctx = m->private;
struct request_queue *q = hctx->queue;
int res;
mutex_lock(&q->sysfs_lock);
res = mutex_lock_interruptible(&q->sysfs_lock);
if (res)
goto out;
if (hctx->sched_tags)
sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m);
mutex_unlock(&q->sysfs_lock);
return 0;
out:
return res;
}
static int hctx_sched_tags_bitmap_open(struct inode *inode, struct file *file)
@ -482,6 +501,7 @@ static const struct file_operations hctx_active_fops = {
};
static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos)
__acquires(&ctx->lock)
{
struct blk_mq_ctx *ctx = m->private;
@ -497,6 +517,7 @@ static void *ctx_rq_list_next(struct seq_file *m, void *v, loff_t *pos)
}
static void ctx_rq_list_stop(struct seq_file *m, void *v)
__releases(&ctx->lock)
{
struct blk_mq_ctx *ctx = m->private;
@ -630,6 +651,7 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = {
{"queued", 0600, &hctx_queued_fops},
{"run", 0600, &hctx_run_fops},
{"active", 0400, &hctx_active_fops},
{},
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
@ -637,14 +659,15 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
{"dispatched", 0600, &ctx_dispatched_fops},
{"merged", 0600, &ctx_merged_fops},
{"completed", 0600, &ctx_completed_fops},
{},
};
int blk_mq_debugfs_register(struct request_queue *q, const char *name)
{
if (!block_debugfs_root)
if (!blk_debugfs_root)
return -ENOENT;
q->debugfs_dir = debugfs_create_dir(name, block_debugfs_root);
q->debugfs_dir = debugfs_create_dir(name, blk_debugfs_root);
if (!q->debugfs_dir)
goto err;
@ -665,27 +688,31 @@ void blk_mq_debugfs_unregister(struct request_queue *q)
q->debugfs_dir = NULL;
}
static bool debugfs_create_files(struct dentry *parent, void *data,
const struct blk_mq_debugfs_attr *attr)
{
for (; attr->name; attr++) {
if (!debugfs_create_file(attr->name, attr->mode, parent,
data, attr->fops))
return false;
}
return true;
}
static int blk_mq_debugfs_register_ctx(struct request_queue *q,
struct blk_mq_ctx *ctx,
struct dentry *hctx_dir)
{
struct dentry *ctx_dir;
char name[20];
int i;
snprintf(name, sizeof(name), "cpu%u", ctx->cpu);
ctx_dir = debugfs_create_dir(name, hctx_dir);
if (!ctx_dir)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(blk_mq_debugfs_ctx_attrs); i++) {
const struct blk_mq_debugfs_attr *attr;
attr = &blk_mq_debugfs_ctx_attrs[i];
if (!debugfs_create_file(attr->name, attr->mode, ctx_dir, ctx,
attr->fops))
return -ENOMEM;
}
if (!debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs))
return -ENOMEM;
return 0;
}
@ -703,14 +730,8 @@ static int blk_mq_debugfs_register_hctx(struct request_queue *q,
if (!hctx_dir)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(blk_mq_debugfs_hctx_attrs); i++) {
const struct blk_mq_debugfs_attr *attr;
attr = &blk_mq_debugfs_hctx_attrs[i];
if (!debugfs_create_file(attr->name, attr->mode, hctx_dir, hctx,
attr->fops))
return -ENOMEM;
}
if (!debugfs_create_files(hctx_dir, hctx, blk_mq_debugfs_hctx_attrs))
return -ENOMEM;
hctx_for_each_ctx(hctx, ctx, i) {
if (blk_mq_debugfs_register_ctx(q, ctx, hctx_dir))
@ -749,8 +770,3 @@ void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
debugfs_remove_recursive(q->mq_debugfs_dir);
q->mq_debugfs_dir = NULL;
}
void blk_mq_debugfs_init(void)
{
block_debugfs_root = debugfs_create_dir("block", NULL);
}

86
block/blk-mq-sched.c
View File

@ -68,7 +68,9 @@ error:
EXPORT_SYMBOL_GPL(blk_mq_sched_init_hctx_data);
static void __blk_mq_sched_assign_ioc(struct request_queue *q,
struct request *rq, struct io_context *ioc)
struct request *rq,
struct bio *bio,
struct io_context *ioc)
{
struct io_cq *icq;
@ -83,7 +85,7 @@ static void __blk_mq_sched_assign_ioc(struct request_queue *q,
}
rq->elv.icq = icq;
if (!blk_mq_sched_get_rq_priv(q, rq)) {
if (!blk_mq_sched_get_rq_priv(q, rq, bio)) {
rq->rq_flags |= RQF_ELVPRIV;
get_io_context(icq->ioc);
return;
@ -99,7 +101,7 @@ static void blk_mq_sched_assign_ioc(struct request_queue *q,
ioc = rq_ioc(bio);
if (ioc)
__blk_mq_sched_assign_ioc(q, rq, ioc);
__blk_mq_sched_assign_ioc(q, rq, bio, ioc);
}
struct request *blk_mq_sched_get_request(struct request_queue *q,
@ -173,6 +175,8 @@ void blk_mq_sched_put_request(struct request *rq)
void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx)
{
struct elevator_queue *e = hctx->queue->elevator;
const bool has_sched_dispatch = e && e->type->ops.mq.dispatch_request;
bool did_work = false;
LIST_HEAD(rq_list);
if (unlikely(blk_mq_hctx_stopped(hctx)))
@ -202,11 +206,18 @@ void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx)
*/
if (!list_empty(&rq_list)) {
blk_mq_sched_mark_restart(hctx);
blk_mq_dispatch_rq_list(hctx, &rq_list);
} else if (!e || !e->type->ops.mq.dispatch_request) {
did_work = blk_mq_dispatch_rq_list(hctx, &rq_list);
} else if (!has_sched_dispatch) {
blk_mq_flush_busy_ctxs(hctx, &rq_list);
blk_mq_dispatch_rq_list(hctx, &rq_list);
} else {
}
/*
* We want to dispatch from the scheduler if we had no work left
* on the dispatch list, OR if we did have work but weren't able
* to make progress.
*/
if (!did_work && has_sched_dispatch) {
do {
struct request *rq;
@ -234,31 +245,33 @@ void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx,
}
EXPORT_SYMBOL_GPL(blk_mq_sched_move_to_dispatch);
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio)
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
struct request **merged_request)
{
struct request *rq;
int ret;
ret = elv_merge(q, &rq, bio);
if (ret == ELEVATOR_BACK_MERGE) {
switch (elv_merge(q, &rq, bio)) {
case ELEVATOR_BACK_MERGE:
if (!blk_mq_sched_allow_merge(q, rq, bio))
return false;
if (bio_attempt_back_merge(q, rq, bio)) {
if (!attempt_back_merge(q, rq))
elv_merged_request(q, rq, ret);
return true;
}
} else if (ret == ELEVATOR_FRONT_MERGE) {
if (!bio_attempt_back_merge(q, rq, bio))
return false;
*merged_request = attempt_back_merge(q, rq);
if (!*merged_request)
elv_merged_request(q, rq, ELEVATOR_BACK_MERGE);
return true;
case ELEVATOR_FRONT_MERGE:
if (!blk_mq_sched_allow_merge(q, rq, bio))
return false;
if (bio_attempt_front_merge(q, rq, bio)) {
if (!attempt_front_merge(q, rq))
elv_merged_request(q, rq, ret);
return true;
}
if (!bio_attempt_front_merge(q, rq, bio))
return false;
*merged_request = attempt_front_merge(q, rq);
if (!*merged_request)
elv_merged_request(q, rq, ELEVATOR_FRONT_MERGE);
return true;
default:
return false;
}
return false;
}
EXPORT_SYMBOL_GPL(blk_mq_sched_try_merge);
@ -289,7 +302,8 @@ void blk_mq_sched_request_inserted(struct request *rq)
}
EXPORT_SYMBOL_GPL(blk_mq_sched_request_inserted);
bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx, struct request *rq)
static bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
if (rq->tag == -1) {
rq->rq_flags |= RQF_SORTED;
@ -305,7 +319,6 @@ bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx, struct request *rq)
spin_unlock(&hctx->lock);
return true;
}
EXPORT_SYMBOL_GPL(blk_mq_sched_bypass_insert);
static void blk_mq_sched_restart_hctx(struct blk_mq_hw_ctx *hctx)
{
@ -347,7 +360,7 @@ static void blk_mq_sched_insert_flush(struct blk_mq_hw_ctx *hctx,
blk_insert_flush(rq);
blk_mq_run_hw_queue(hctx, true);
} else
blk_mq_add_to_requeue_list(rq, true, true);
blk_mq_add_to_requeue_list(rq, false, true);
}
void blk_mq_sched_insert_request(struct request *rq, bool at_head,
@ -363,6 +376,9 @@ void blk_mq_sched_insert_request(struct request *rq, bool at_head,
return;
}
if (e && blk_mq_sched_bypass_insert(hctx, rq))
goto run;
if (e && e->type->ops.mq.insert_requests) {
LIST_HEAD(list);
@ -374,6 +390,7 @@ void blk_mq_sched_insert_request(struct request *rq, bool at_head,
spin_unlock(&ctx->lock);
}
run:
if (run_queue)
blk_mq_run_hw_queue(hctx, async);
}
@ -385,6 +402,23 @@ void blk_mq_sched_insert_requests(struct request_queue *q,
struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(q, ctx->cpu);
struct elevator_queue *e = hctx->queue->elevator;
if (e) {
struct request *rq, *next;
/*
* We bypass requests that already have a driver tag assigned,
* which should only be flushes. Flushes are only ever inserted
* as single requests, so we shouldn't ever hit the
* WARN_ON_ONCE() below (but let's handle it just in case).
*/
list_for_each_entry_safe(rq, next, list, queuelist) {
if (WARN_ON_ONCE(rq->tag != -1)) {
list_del_init(&rq->queuelist);
blk_mq_sched_bypass_insert(hctx, rq);
}
}
}
if (e && e->type->ops.mq.insert_requests)
e->type->ops.mq.insert_requests(hctx, list, false);
else

9
block/blk-mq-sched.h
View File

@ -15,8 +15,8 @@ struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bi
void blk_mq_sched_put_request(struct request *rq);
void blk_mq_sched_request_inserted(struct request *rq);
bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx, struct request *rq);
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio);
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
struct request **merged_request);
bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx);
@ -49,12 +49,13 @@ blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
}
static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
struct request *rq)
struct request *rq,
struct bio *bio)
{
struct elevator_queue *e = q->elevator;
if (e && e->type->ops.mq.get_rq_priv)
return e->type->ops.mq.get_rq_priv(q, rq);
return e->type->ops.mq.get_rq_priv(q, rq, bio);
return 0;
}

2
block/blk-mq-sysfs.c
View File

@ -254,7 +254,7 @@ static void __blk_mq_unregister_dev(struct device *dev, struct request_queue *q)
kobject_put(&hctx->kobj);
}
blk_mq_debugfs_unregister(q);
blk_mq_debugfs_unregister_hctxs(q);
kobject_uevent(&q->mq_kobj, KOBJ_REMOVE);
kobject_del(&q->mq_kobj);

77
block/blk-mq.c
View File

@ -199,13 +199,7 @@ void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->special = NULL;
/* tag was already set */
rq->errors = 0;
rq->cmd = rq->__cmd;
rq->extra_len = 0;
rq->sense_len = 0;
rq->resid_len = 0;
rq->sense = NULL;
INIT_LIST_HEAD(&rq->timeout_list);
rq->timeout = 0;
@ -487,10 +481,6 @@ void blk_mq_start_request(struct request *rq)
trace_block_rq_issue(q, rq);
rq->resid_len = blk_rq_bytes(rq);
if (unlikely(blk_bidi_rq(rq)))
rq->next_rq->resid_len = blk_rq_bytes(rq->next_rq);
if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) {
blk_stat_set_issue_time(&rq->issue_stat);
rq->rq_flags |= RQF_STATS;
@ -773,7 +763,7 @@ static bool blk_mq_attempt_merge(struct request_queue *q,
int checked = 8;
list_for_each_entry_reverse(rq, &ctx->rq_list, queuelist) {
int el_ret;
bool merged = false;
if (!checked--)
break;
@ -781,26 +771,25 @@ static bool blk_mq_attempt_merge(struct request_queue *q,
if (!blk_rq_merge_ok(rq, bio))
continue;
el_ret = blk_try_merge(rq, bio);
if (el_ret == ELEVATOR_NO_MERGE)
switch (blk_try_merge(rq, bio)) {
case ELEVATOR_BACK_MERGE:
if (blk_mq_sched_allow_merge(q, rq, bio))
merged = bio_attempt_back_merge(q, rq, bio);
break;
case ELEVATOR_FRONT_MERGE:
if (blk_mq_sched_allow_merge(q, rq, bio))
merged = bio_attempt_front_merge(q, rq, bio);
break;
case ELEVATOR_DISCARD_MERGE:
merged = bio_attempt_discard_merge(q, rq, bio);
break;
default:
continue;
if (!blk_mq_sched_allow_merge(q, rq, bio))
break;
if (el_ret == ELEVATOR_BACK_MERGE) {
if (bio_attempt_back_merge(q, rq, bio)) {
ctx->rq_merged++;
return true;
}
break;
} else if (el_ret == ELEVATOR_FRONT_MERGE) {
if (bio_attempt_front_merge(q, rq, bio)) {
ctx->rq_merged++;
return true;
}
break;
}
if (merged)
ctx->rq_merged++;
return merged;
}
return false;
@ -1013,7 +1002,7 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
blk_mq_run_hw_queue(hctx, true);
}
return ret != BLK_MQ_RQ_QUEUE_BUSY;
return queued != 0;
}
static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
@ -1442,12 +1431,11 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
cookie = request_to_qc_t(data.hctx, rq);
if (unlikely(is_flush_fua)) {
blk_mq_put_ctx(data.ctx);
if (q->elevator)
goto elv_insert;
blk_mq_bio_to_request(rq, bio);
blk_mq_get_driver_tag(rq, NULL, true);
blk_insert_flush(rq);
blk_mq_run_hw_queue(data.hctx, true);
goto done;
goto run_queue;
}
plug = current->plug;
@ -1497,6 +1485,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
}
if (q->elevator) {
elv_insert:
blk_mq_put_ctx(data.ctx);
blk_mq_bio_to_request(rq, bio);
blk_mq_sched_insert_request(rq, false, true,
@ -1510,6 +1499,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
* latter allows for merging opportunities and more efficient
* dispatching.
*/
run_queue:
blk_mq_run_hw_queue(data.hctx, !is_sync || is_flush_fua);
}
blk_mq_put_ctx(data.ctx);
@ -1565,12 +1555,11 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
cookie = request_to_qc_t(data.hctx, rq);
if (unlikely(is_flush_fua)) {
blk_mq_put_ctx(data.ctx);
if (q->elevator)
goto elv_insert;
blk_mq_bio_to_request(rq, bio);
blk_mq_get_driver_tag(rq, NULL, true);
blk_insert_flush(rq);
blk_mq_run_hw_queue(data.hctx, true);
goto done;
goto run_queue;
}
/*
@ -1608,6 +1597,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
}
if (q->elevator) {
elv_insert:
blk_mq_put_ctx(data.ctx);
blk_mq_bio_to_request(rq, bio);
blk_mq_sched_insert_request(rq, false, true,
@ -1621,6 +1611,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
* latter allows for merging opportunities and more efficient
* dispatching.
*/
run_queue:
blk_mq_run_hw_queue(data.hctx, !is_sync || is_flush_fua);
}
@ -2637,10 +2628,14 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues)
list_for_each_entry(q, &set->tag_list, tag_set_list) {
blk_mq_realloc_hw_ctxs(set, q);
/*
* Manually set the make_request_fn as blk_queue_make_request
* resets a lot of the queue settings.
*/
if (q->nr_hw_queues > 1)
blk_queue_make_request(q, blk_mq_make_request);
q->make_request_fn = blk_mq_make_request;
else
blk_queue_make_request(q, blk_sq_make_request);
q->make_request_fn = blk_sq_make_request;
blk_mq_queue_reinit(q, cpu_online_mask);
}
@ -2824,8 +2819,6 @@ void blk_mq_enable_hotplug(void)
static int __init blk_mq_init(void)
{
blk_mq_debugfs_init();
cpuhp_setup_state_multi(CPUHP_BLK_MQ_DEAD, "block/mq:dead", NULL,
blk_mq_hctx_notify_dead);

5
block/blk-mq.h
View File

@ -85,16 +85,11 @@ extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx);
* debugfs helpers
*/
#ifdef CONFIG_BLK_DEBUG_FS
void blk_mq_debugfs_init(void);
int blk_mq_debugfs_register(struct request_queue *q, const char *name);
void blk_mq_debugfs_unregister(struct request_queue *q);
int blk_mq_debugfs_register_hctxs(struct request_queue *q);
void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
#else
static inline void blk_mq_debugfs_init(void)
{
}
static inline int blk_mq_debugfs_register(struct request_queue *q,
const char *name)
{

22
block/blk-settings.c
View File

@ -88,6 +88,7 @@ EXPORT_SYMBOL_GPL(blk_queue_lld_busy);
void blk_set_default_limits(struct queue_limits *lim)
{
lim->max_segments = BLK_MAX_SEGMENTS;
lim->max_discard_segments = 1;
lim->max_integrity_segments = 0;
lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
lim->virt_boundary_mask = 0;
@ -128,6 +129,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
/* Inherit limits from component devices */
lim->discard_zeroes_data = 1;
lim->max_segments = USHRT_MAX;
lim->max_discard_segments = 1;
lim->max_hw_sectors = UINT_MAX;
lim->max_segment_size = UINT_MAX;
lim->max_sectors = UINT_MAX;
@ -253,7 +255,7 @@ void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_secto
max_sectors = min_not_zero(max_hw_sectors, limits->max_dev_sectors);
max_sectors = min_t(unsigned int, max_sectors, BLK_DEF_MAX_SECTORS);
limits->max_sectors = max_sectors;
q->backing_dev_info.io_pages = max_sectors >> (PAGE_SHIFT - 9);
q->backing_dev_info->io_pages = max_sectors >> (PAGE_SHIFT - 9);
}
EXPORT_SYMBOL(blk_queue_max_hw_sectors);
@ -336,6 +338,22 @@ void blk_queue_max_segments(struct request_queue *q, unsigned short max_segments
}
EXPORT_SYMBOL(blk_queue_max_segments);
/**
* blk_queue_max_discard_segments - set max segments for discard requests
* @q: the request queue for the device
* @max_segments: max number of segments
*
* Description:
* Enables a low level driver to set an upper limit on the number of
* segments in a discard request.
**/
void blk_queue_max_discard_segments(struct request_queue *q,
unsigned short max_segments)
{
q->limits.max_discard_segments = max_segments;
}
EXPORT_SYMBOL_GPL(blk_queue_max_discard_segments);
/**
* blk_queue_max_segment_size - set max segment size for blk_rq_map_sg
* @q: the request queue for the device
@ -553,6 +571,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
b->virt_boundary_mask);
t->max_segments = min_not_zero(t->max_segments, b->max_segments);
t->max_discard_segments = min_not_zero(t->max_discard_segments,
b->max_discard_segments);
t->max_integrity_segments = min_not_zero(t->max_integrity_segments,
b->max_integrity_segments);

68
block/blk-sysfs.c
View File

@ -89,7 +89,7 @@ queue_requests_store(struct request_queue *q, const char *page, size_t count)
static ssize_t queue_ra_show(struct request_queue *q, char *page)
{
unsigned long ra_kb = q->backing_dev_info.ra_pages <<
unsigned long ra_kb = q->backing_dev_info->ra_pages <<
(PAGE_SHIFT - 10);
return queue_var_show(ra_kb, (page));
@ -104,7 +104,7 @@ queue_ra_store(struct request_queue *q, const char *page, size_t count)
if (ret < 0)
return ret;
q->backing_dev_info.ra_pages = ra_kb >> (PAGE_SHIFT - 10);
q->backing_dev_info->ra_pages = ra_kb >> (PAGE_SHIFT - 10);
return ret;
}
@ -121,6 +121,12 @@ static ssize_t queue_max_segments_show(struct request_queue *q, char *page)
return queue_var_show(queue_max_segments(q), (page));
}
static ssize_t queue_max_discard_segments_show(struct request_queue *q,
char *page)
{
return queue_var_show(queue_max_discard_segments(q), (page));
}
static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.max_integrity_segments, (page));
@ -236,7 +242,7 @@ queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
spin_lock_irq(q->queue_lock);
q->limits.max_sectors = max_sectors_kb << 1;
q->backing_dev_info.io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);
q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);
spin_unlock_irq(q->queue_lock);
return ret;
@ -545,6 +551,11 @@ static struct queue_sysfs_entry queue_max_segments_entry = {
.show = queue_max_segments_show,
};
static struct queue_sysfs_entry queue_max_discard_segments_entry = {
.attr = {.name = "max_discard_segments", .mode = S_IRUGO },
.show = queue_max_discard_segments_show,
};
static struct queue_sysfs_entry queue_max_integrity_segments_entry = {
.attr = {.name = "max_integrity_segments", .mode = S_IRUGO },
.show = queue_max_integrity_segments_show,
@ -697,6 +708,7 @@ static struct attribute *default_attrs[] = {
&queue_max_hw_sectors_entry.attr,
&queue_max_sectors_entry.attr,
&queue_max_segments_entry.attr,
&queue_max_discard_segments_entry.attr,
&queue_max_integrity_segments_entry.attr,
&queue_max_segment_size_entry.attr,
&queue_iosched_entry.attr,
@ -799,7 +811,7 @@ static void blk_release_queue(struct kobject *kobj)
container_of(kobj, struct request_queue, kobj);
wbt_exit(q);
bdi_exit(&q->backing_dev_info);
bdi_put(q->backing_dev_info);
blkcg_exit_queue(q);
if (q->elevator) {
@ -814,13 +826,19 @@ static void blk_release_queue(struct kobject *kobj)
if (q->queue_tags)
__blk_queue_free_tags(q);
if (!q->mq_ops)
if (!q->mq_ops) {
if (q->exit_rq_fn)
q->exit_rq_fn(q, q->fq->flush_rq);
blk_free_flush_queue(q->fq);
else
} else {
blk_mq_release(q);
}
blk_trace_shutdown(q);
if (q->mq_ops)
blk_mq_debugfs_unregister(q);
if (q->bio_split)
bioset_free(q->bio_split);
@ -884,32 +902,36 @@ int blk_register_queue(struct gendisk *disk)
if (ret)
return ret;
if (q->mq_ops)
blk_mq_register_dev(dev, q);
/* Prevent changes through sysfs until registration is completed. */
mutex_lock(&q->sysfs_lock);
ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue");
if (ret < 0) {
blk_trace_remove_sysfs(dev);
return ret;
goto unlock;
}
kobject_uevent(&q->kobj, KOBJ_ADD);
if (q->mq_ops)
blk_mq_register_dev(dev, q);
blk_wb_init(q);
if (!q->request_fn)
return 0;
ret = elv_register_queue(q);
if (ret) {
kobject_uevent(&q->kobj, KOBJ_REMOVE);
kobject_del(&q->kobj);
blk_trace_remove_sysfs(dev);
kobject_put(&dev->kobj);
return ret;
if (q->request_fn || (q->mq_ops && q->elevator)) {
ret = elv_register_queue(q);
if (ret) {
kobject_uevent(&q->kobj, KOBJ_REMOVE);
kobject_del(&q->kobj);
blk_trace_remove_sysfs(dev);
kobject_put(&dev->kobj);
goto unlock;
}
}
return 0;
ret = 0;
unlock:
mutex_unlock(&q->sysfs_lock);
return ret;
}
void blk_unregister_queue(struct gendisk *disk)
@ -922,7 +944,7 @@ void blk_unregister_queue(struct gendisk *disk)
if (q->mq_ops)
blk_mq_unregister_dev(disk_to_dev(disk), q);
if (q->request_fn)
if (q->request_fn || (q->mq_ops && q->elevator))
elv_unregister_queue(q);
kobject_uevent(&q->kobj, KOBJ_REMOVE);

8
block/blk-wbt.c
View File

@ -96,7 +96,7 @@ static void wb_timestamp(struct rq_wb *rwb, unsigned long *var)
*/
static bool wb_recent_wait(struct rq_wb *rwb)
{
struct bdi_writeback *wb = &rwb->queue->backing_dev_info.wb;
struct bdi_writeback *wb = &rwb->queue->backing_dev_info->wb;
return time_before(jiffies, wb->dirty_sleep + HZ);
}
@ -279,7 +279,7 @@ enum {
static int __latency_exceeded(struct rq_wb *rwb, struct blk_rq_stat *stat)
{
struct backing_dev_info *bdi = &rwb->queue->backing_dev_info;
struct backing_dev_info *bdi = rwb->queue->backing_dev_info;
u64 thislat;
/*
@ -339,7 +339,7 @@ static int latency_exceeded(struct rq_wb *rwb)
static void rwb_trace_step(struct rq_wb *rwb, const char *msg)
{
struct backing_dev_info *bdi = &rwb->queue->backing_dev_info;
struct backing_dev_info *bdi = rwb->queue->backing_dev_info;
trace_wbt_step(bdi, msg, rwb->scale_step, rwb->cur_win_nsec,
rwb->wb_background, rwb->wb_normal, rwb->wb_max);
@ -423,7 +423,7 @@ static void wb_timer_fn(unsigned long data)
status = latency_exceeded(rwb);
trace_wbt_timer(&rwb->queue->backing_dev_info, status, rwb->scale_step,
trace_wbt_timer(rwb->queue->backing_dev_info, status, rwb->scale_step,
inflight);
/*

21
block/blk.h
View File

@ -14,6 +14,10 @@
/* Max future timer expiry for timeouts */
#define BLK_MAX_TIMEOUT (5 * HZ)
#ifdef CONFIG_DEBUG_FS
extern struct dentry *blk_debugfs_root;
#endif
struct blk_flush_queue {
unsigned int flush_queue_delayed:1;
unsigned int flush_pending_idx:1;
@ -96,6 +100,8 @@ bool bio_attempt_front_merge(struct request_queue *q, struct request *req,
struct bio *bio);
bool bio_attempt_back_merge(struct request_queue *q, struct request *req,
struct bio *bio);
bool bio_attempt_discard_merge(struct request_queue *q, struct request *req,
struct bio *bio);
bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
unsigned int *request_count,
struct request **same_queue_rq);
@ -204,14 +210,14 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
struct bio *bio);
int ll_front_merge_fn(struct request_queue *q, struct request *req,
struct bio *bio);
int attempt_back_merge(struct request_queue *q, struct request *rq);
int attempt_front_merge(struct request_queue *q, struct request *rq);
struct request *attempt_back_merge(struct request_queue *q, struct request *rq);
struct request *attempt_front_merge(struct request_queue *q, struct request *rq);
int blk_attempt_req_merge(struct request_queue *q, struct request *rq,
struct request *next);
void blk_recalc_rq_segments(struct request *rq);
void blk_rq_set_mixed_merge(struct request *rq);
bool blk_rq_merge_ok(struct request *rq, struct bio *bio);
int blk_try_merge(struct request *rq, struct bio *bio);
enum elv_merge blk_try_merge(struct request *rq, struct bio *bio);
void blk_queue_congestion_threshold(struct request_queue *q);
@ -249,7 +255,14 @@ static inline int blk_do_io_stat(struct request *rq)
{
return rq->rq_disk &&
(rq->rq_flags & RQF_IO_STAT) &&
(rq->cmd_type == REQ_TYPE_FS);
!blk_rq_is_passthrough(rq);
}
static inline void req_set_nomerge(struct request_queue *q, struct request *req)
{
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
}
/*

49
block/bsg-lib.c
View File

@ -71,22 +71,24 @@ void bsg_job_done(struct bsg_job *job, int result,
{
struct request *req = job->req;
struct request *rsp = req->next_rq;
struct scsi_request *rq = scsi_req(req);
int err;
err = job->req->errors = result;
if (err < 0)
/* we're only returning the result field in the reply */
job->req->sense_len = sizeof(u32);
rq->sense_len = sizeof(u32);
else
job->req->sense_len = job->reply_len;
rq->sense_len = job->reply_len;
/* we assume all request payload was transferred, residual == 0 */
req->resid_len = 0;
rq->resid_len = 0;
if (rsp) {
WARN_ON(reply_payload_rcv_len > rsp->resid_len);
WARN_ON(reply_payload_rcv_len > scsi_req(rsp)->resid_len);
/* set reply (bidi) residual */
rsp->resid_len -= min(reply_payload_rcv_len, rsp->resid_len);
scsi_req(rsp)->resid_len -=
min(reply_payload_rcv_len, scsi_req(rsp)->resid_len);
}
blk_complete_request(req);
}
@ -113,6 +115,7 @@ static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
if (!buf->sg_list)
return -ENOMEM;
sg_init_table(buf->sg_list, req->nr_phys_segments);
scsi_req(req)->resid_len = blk_rq_bytes(req);
buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
buf->payload_len = blk_rq_bytes(req);
return 0;
@ -127,6 +130,7 @@ static int bsg_create_job(struct device *dev, struct request *req)
{
struct request *rsp = req->next_rq;
struct request_queue *q = req->q;
struct scsi_request *rq = scsi_req(req);
struct bsg_job *job;
int ret;
@ -140,9 +144,9 @@ static int bsg_create_job(struct device *dev, struct request *req)
job->req = req;
if (q->bsg_job_size)
job->dd_data = (void *)&job[1];
job->request = req->cmd;
job->request_len = req->cmd_len;
job->reply = req->sense;
job->request = rq->cmd;
job->request_len = rq->cmd_len;
job->reply = rq->sense;
job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
* allocated */
if (req->bio) {
@ -177,7 +181,7 @@ failjob_rls_job:
*
* Drivers/subsys should pass this to the queue init function.
*/
void bsg_request_fn(struct request_queue *q)
static void bsg_request_fn(struct request_queue *q)
__releases(q->queue_lock)
__acquires(q->queue_lock)
{
@ -214,24 +218,30 @@ void bsg_request_fn(struct request_queue *q)
put_device(dev);
spin_lock_irq(q->queue_lock);
}
EXPORT_SYMBOL_GPL(bsg_request_fn);
/**
* bsg_setup_queue - Create and add the bsg hooks so we can receive requests
* @dev: device to attach bsg device to
* @q: request queue setup by caller
* @name: device to give bsg device
* @job_fn: bsg job handler
* @dd_job_size: size of LLD data needed for each job
*
* The caller should have setup the reuqest queue with bsg_request_fn
* as the request_fn.
*/
int bsg_setup_queue(struct device *dev, struct request_queue *q,
char *name, bsg_job_fn *job_fn, int dd_job_size)
struct request_queue *bsg_setup_queue(struct device *dev, char *name,
bsg_job_fn *job_fn, int dd_job_size)
{
struct request_queue *q;
int ret;
q = blk_alloc_queue(GFP_KERNEL);
if (!q)
return ERR_PTR(-ENOMEM);
q->cmd_size = sizeof(struct scsi_request);
q->request_fn = bsg_request_fn;
ret = blk_init_allocated_queue(q);
if (ret)
goto out_cleanup_queue;
q->queuedata = dev;
q->bsg_job_size = dd_job_size;
q->bsg_job_fn = job_fn;
@ -243,9 +253,12 @@ int bsg_setup_queue(struct device *dev, struct request_queue *q,
if (ret) {
printk(KERN_ERR "%s: bsg interface failed to "
"initialize - register queue\n", dev->kobj.name);
return ret;
goto out_cleanup_queue;
}
return 0;
return q;
out_cleanup_queue:
blk_cleanup_queue(q);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(bsg_setup_queue);

64
block/bsg.c
View File

@ -85,7 +85,6 @@ struct bsg_command {
struct bio *bidi_bio;
int err;
struct sg_io_v4 hdr;
char sense[SCSI_SENSE_BUFFERSIZE];
};
static void bsg_free_command(struct bsg_command *bc)
@ -140,18 +139,20 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
struct sg_io_v4 *hdr, struct bsg_device *bd,
fmode_t has_write_perm)
{
struct scsi_request *req = scsi_req(rq);
if (hdr->request_len > BLK_MAX_CDB) {
rq->cmd = kzalloc(hdr->request_len, GFP_KERNEL);
if (!rq->cmd)
req->cmd = kzalloc(hdr->request_len, GFP_KERNEL);
if (!req->cmd)
return -ENOMEM;
}
if (copy_from_user(rq->cmd, (void __user *)(unsigned long)hdr->request,
if (copy_from_user(req->cmd, (void __user *)(unsigned long)hdr->request,
hdr->request_len))
return -EFAULT;
if (hdr->subprotocol == BSG_SUB_PROTOCOL_SCSI_CMD) {
if (blk_verify_command(rq->cmd, has_write_perm))
if (blk_verify_command(req->cmd, has_write_perm))
return -EPERM;
} else if (!capable(CAP_SYS_RAWIO))
return -EPERM;
@ -159,7 +160,7 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
/*
* fill in request structure
*/
rq->cmd_len = hdr->request_len;
req->cmd_len = hdr->request_len;
rq->timeout = msecs_to_jiffies(hdr->timeout);
if (!rq->timeout)
@ -176,7 +177,7 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
* Check if sg_io_v4 from user is allowed and valid
*/
static int
bsg_validate_sgv4_hdr(struct sg_io_v4 *hdr, int *rw)
bsg_validate_sgv4_hdr(struct sg_io_v4 *hdr, int *op)
{
int ret = 0;
@ -197,7 +198,7 @@ bsg_validate_sgv4_hdr(struct sg_io_v4 *hdr, int *rw)
ret = -EINVAL;
}
*rw = hdr->dout_xfer_len ? WRITE : READ;
*op = hdr->dout_xfer_len ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN;
return ret;
}
@ -205,13 +206,12 @@ bsg_validate_sgv4_hdr(struct sg_io_v4 *hdr, int *rw)
* map sg_io_v4 to a request.
*/
static struct request *
bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
u8 *sense)
bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm)
{
struct request_queue *q = bd->queue;
struct request *rq, *next_rq = NULL;
int ret, rw;
unsigned int dxfer_len;
int ret;
unsigned int op, dxfer_len;
void __user *dxferp = NULL;
struct bsg_class_device *bcd = &q->bsg_dev;
@ -226,36 +226,35 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
hdr->dout_xfer_len, (unsigned long long) hdr->din_xferp,
hdr->din_xfer_len);
ret = bsg_validate_sgv4_hdr(hdr, &rw);
ret = bsg_validate_sgv4_hdr(hdr, &op);
if (ret)
return ERR_PTR(ret);
/*
* map scatter-gather elements separately and string them to request
*/
rq = blk_get_request(q, rw, GFP_KERNEL);
rq = blk_get_request(q, op, GFP_KERNEL);
if (IS_ERR(rq))
return rq;
blk_rq_set_block_pc(rq);
scsi_req_init(rq);
ret = blk_fill_sgv4_hdr_rq(q, rq, hdr, bd, has_write_perm);
if (ret)
goto out;
if (rw == WRITE && hdr->din_xfer_len) {
if (op == REQ_OP_SCSI_OUT && hdr->din_xfer_len) {
if (!test_bit(QUEUE_FLAG_BIDI, &q->queue_flags)) {
ret = -EOPNOTSUPP;
goto out;
}
next_rq = blk_get_request(q, READ, GFP_KERNEL);
next_rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
if (IS_ERR(next_rq)) {
ret = PTR_ERR(next_rq);
next_rq = NULL;
goto out;
}
rq->next_rq = next_rq;
next_rq->cmd_type = rq->cmd_type;
dxferp = (void __user *)(unsigned long)hdr->din_xferp;
ret = blk_rq_map_user(q, next_rq, NULL, dxferp,
@ -280,13 +279,9 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
goto out;
}
rq->sense = sense;
rq->sense_len = 0;
return rq;
out:
if (rq->cmd != rq->__cmd)
kfree(rq->cmd);
scsi_req_free_cmd(scsi_req(rq));
blk_put_request(rq);
if (next_rq) {
blk_rq_unmap_user(next_rq->bio);
@ -393,6 +388,7 @@ static struct bsg_command *bsg_get_done_cmd(struct bsg_device *bd)
static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
struct bio *bio, struct bio *bidi_bio)
{
struct scsi_request *req = scsi_req(rq);
int ret = 0;
dprintk("rq %p bio %p 0x%x\n", rq, bio, rq->errors);
@ -407,12 +403,12 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
hdr->info |= SG_INFO_CHECK;
hdr->response_len = 0;
if (rq->sense_len && hdr->response) {
if (req->sense_len && hdr->response) {
int len = min_t(unsigned int, hdr->max_response_len,
rq->sense_len);
req->sense_len);
ret = copy_to_user((void __user *)(unsigned long)hdr->response,
rq->sense, len);
req->sense, len);
if (!ret)
hdr->response_len = len;
else
@ -420,14 +416,14 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
}
if (rq->next_rq) {
hdr->dout_resid = rq->resid_len;
hdr->din_resid = rq->next_rq->resid_len;
hdr->dout_resid = req->resid_len;
hdr->din_resid = scsi_req(rq->next_rq)->resid_len;
blk_rq_unmap_user(bidi_bio);
blk_put_request(rq->next_rq);
} else if (rq_data_dir(rq) == READ)
hdr->din_resid = rq->resid_len;
hdr->din_resid = req->resid_len;
else
hdr->dout_resid = rq->resid_len;
hdr->dout_resid = req->resid_len;
/*
* If the request generated a negative error number, return it
@ -439,8 +435,7 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
ret = rq->errors;
blk_rq_unmap_user(bio);
if (rq->cmd != rq->__cmd)
kfree(rq->cmd);
scsi_req_free_cmd(req);
blk_put_request(rq);
return ret;
@ -625,7 +620,7 @@ static int __bsg_write(struct bsg_device *bd, const char __user *buf,
/*
* get a request, fill in the blanks, and add to request queue
*/
rq = bsg_map_hdr(bd, &bc->hdr, has_write_perm, bc->sense);
rq = bsg_map_hdr(bd, &bc->hdr, has_write_perm);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
rq = NULL;
@ -911,12 +906,11 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
struct bio *bio, *bidi_bio = NULL;
struct sg_io_v4 hdr;
int at_head;
u8 sense[SCSI_SENSE_BUFFERSIZE];
if (copy_from_user(&hdr, uarg, sizeof(hdr)))
return -EFAULT;
rq = bsg_map_hdr(bd, &hdr, file->f_mode & FMODE_WRITE, sense);
rq = bsg_map_hdr(bd, &hdr, file->f_mode & FMODE_WRITE);
if (IS_ERR(rq))
return PTR_ERR(rq);

4
block/cfq-iosched.c
View File

@ -2528,7 +2528,7 @@ static void cfq_remove_request(struct request *rq)
}
}
static int cfq_merge(struct request_queue *q, struct request **req,
static enum elv_merge cfq_merge(struct request_queue *q, struct request **req,
struct bio *bio)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
@ -2544,7 +2544,7 @@ static int cfq_merge(struct request_queue *q, struct request **req,
}
static void cfq_merged_request(struct request_queue *q, struct request *req,
int type)
enum elv_merge type)
{
if (type == ELEVATOR_FRONT_MERGE) {
struct cfq_queue *cfqq = RQ_CFQQ(req);

7
block/compat_ioctl.c
View File

@ -661,7 +661,6 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
struct block_device *bdev = inode->i_bdev;
struct gendisk *disk = bdev->bd_disk;
fmode_t mode = file->f_mode;
struct backing_dev_info *bdi;
loff_t size;
unsigned int max_sectors;
@ -708,9 +707,8 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
case BLKFRAGET:
if (!arg)
return -EINVAL;
bdi = blk_get_backing_dev_info(bdev);
return compat_put_long(arg,
(bdi->ra_pages * PAGE_SIZE) / 512);
(bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);
case BLKROGET: /* compatible */
return compat_put_int(arg, bdev_read_only(bdev) != 0);
case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
@ -728,8 +726,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
case BLKFRASET:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
bdi = blk_get_backing_dev_info(bdev);
bdi->ra_pages = (arg * 512) / PAGE_SIZE;
bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
return 0;
case BLKGETSIZE:
size = i_size_read(bdev->bd_inode);

12
block/deadline-iosched.c
View File

@ -120,12 +120,11 @@ static void deadline_remove_request(struct request_queue *q, struct request *rq)
deadline_del_rq_rb(dd, rq);
}
static int
static enum elv_merge
deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
{
struct deadline_data *dd = q->elevator->elevator_data;
struct request *__rq;
int ret;
/*
* check for front merge
@ -138,20 +137,17 @@ deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
BUG_ON(sector != blk_rq_pos(__rq));
if (elv_bio_merge_ok(__rq, bio)) {
ret = ELEVATOR_FRONT_MERGE;
goto out;
*req = __rq;
return ELEVATOR_FRONT_MERGE;
}
}
}
return ELEVATOR_NO_MERGE;
out:
*req = __rq;
return ret;
}
static void deadline_merged_request(struct request_queue *q,
struct request *req, int type)
struct request *req, enum elv_merge type)
{
struct deadline_data *dd = q->elevator->elevator_data;

16
block/elevator.c
View File

@ -428,11 +428,11 @@ void elv_dispatch_add_tail(struct request_queue *q, struct request *rq)
}
EXPORT_SYMBOL(elv_dispatch_add_tail);
int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
enum elv_merge elv_merge(struct request_queue *q, struct request **req,
struct bio *bio)
{
struct elevator_queue *e = q->elevator;
struct request *__rq;
int ret;
/*
* Levels of merges:
@ -447,7 +447,8 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
* First try one-hit cache.
*/
if (q->last_merge && elv_bio_merge_ok(q->last_merge, bio)) {
ret = blk_try_merge(q->last_merge, bio);
enum elv_merge ret = blk_try_merge(q->last_merge, bio);
if (ret != ELEVATOR_NO_MERGE) {
*req = q->last_merge;
return ret;
@ -515,7 +516,8 @@ bool elv_attempt_insert_merge(struct request_queue *q, struct request *rq)
return ret;
}
void elv_merged_request(struct request_queue *q, struct request *rq, int type)
void elv_merged_request(struct request_queue *q, struct request *rq,
enum elv_merge type)
{
struct elevator_queue *e = q->elevator;
@ -539,7 +541,7 @@ void elv_merge_requests(struct request_queue *q, struct request *rq,
if (e->uses_mq && e->type->ops.mq.requests_merged)
e->type->ops.mq.requests_merged(q, rq, next);
else if (e->type->ops.sq.elevator_merge_req_fn) {
next_sorted = next->rq_flags & RQF_SORTED;
next_sorted = (__force bool)(next->rq_flags & RQF_SORTED);
if (next_sorted)
e->type->ops.sq.elevator_merge_req_fn(q, rq, next);
}
@ -635,7 +637,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
if (rq->rq_flags & RQF_SOFTBARRIER) {
/* barriers are scheduling boundary, update end_sector */
if (rq->cmd_type == REQ_TYPE_FS) {
if (!blk_rq_is_passthrough(rq)) {
q->end_sector = rq_end_sector(rq);
q->boundary_rq = rq;
}
@ -677,7 +679,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
if (elv_attempt_insert_merge(q, rq))
break;
case ELEVATOR_INSERT_SORT:
BUG_ON(rq->cmd_type != REQ_TYPE_FS);
BUG_ON(blk_rq_is_passthrough(rq));
rq->rq_flags |= RQF_SORTED;
q->nr_sorted++;
if (rq_mergeable(rq)) {

25
block/genhd.c
View File

@ -572,6 +572,20 @@ exit:
disk_part_iter_exit(&piter);
}
void put_disk_devt(struct disk_devt *disk_devt)
{
if (disk_devt && atomic_dec_and_test(&disk_devt->count))
disk_devt->release(disk_devt);
}
EXPORT_SYMBOL(put_disk_devt);
void get_disk_devt(struct disk_devt *disk_devt)
{
if (disk_devt)
atomic_inc(&disk_devt->count);
}
EXPORT_SYMBOL(get_disk_devt);
/**
* device_add_disk - add partitioning information to kernel list
* @parent: parent device for the disk
@ -612,8 +626,15 @@ void device_add_disk(struct device *parent, struct gendisk *disk)
disk_alloc_events(disk);
/*
* Take a reference on the devt and assign it to queue since it
* must not be reallocated while the bdi is registered
*/
disk->queue->disk_devt = disk->disk_devt;
get_disk_devt(disk->disk_devt);
/* Register BDI before referencing it from bdev */
bdi = &disk->queue->backing_dev_info;
bdi = disk->queue->backing_dev_info;
bdi_register_owner(bdi, disk_to_dev(disk));
blk_register_region(disk_devt(disk), disk->minors, NULL,
@ -648,6 +669,8 @@ void del_gendisk(struct gendisk *disk)
disk_part_iter_init(&piter, disk,
DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
while ((part = disk_part_iter_next(&piter))) {
bdev_unhash_inode(MKDEV(disk->major,
disk->first_minor + part->partno));
invalidate_partition(disk, part->partno);
delete_partition(disk, part->partno);
}

7
block/ioctl.c
View File

@ -505,7 +505,6 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
unsigned long arg)
{
struct backing_dev_info *bdi;
void __user *argp = (void __user *)arg;
loff_t size;
unsigned int max_sectors;
@ -532,8 +531,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
case BLKFRAGET:
if (!arg)
return -EINVAL;
bdi = blk_get_backing_dev_info(bdev);
return put_long(arg, (bdi->ra_pages * PAGE_SIZE) / 512);
return put_long(arg, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);
case BLKROGET:
return put_int(arg, bdev_read_only(bdev) != 0);
case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
@ -560,8 +558,7 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
case BLKFRASET:
if(!capable(CAP_SYS_ADMIN))
return -EACCES;
bdi = blk_get_backing_dev_info(bdev);
bdi->ra_pages = (arg * 512) / PAGE_SIZE;
bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
return 0;
case BLKBSZSET:
return blkdev_bszset(bdev, mode, argp);

15
block/mq-deadline.c
View File

@ -121,7 +121,7 @@ static void deadline_remove_request(struct request_queue *q, struct request *rq)
}
static void dd_request_merged(struct request_queue *q, struct request *req,
int type)
enum elv_merge type)
{
struct deadline_data *dd = q->elevator->elevator_data;
@ -371,12 +371,16 @@ static bool dd_bio_merge(struct blk_mq_hw_ctx *hctx, struct bio *bio)
{
struct request_queue *q = hctx->queue;
struct deadline_data *dd = q->elevator->elevator_data;
int ret;
struct request *free = NULL;
bool ret;
spin_lock(&dd->lock);
ret = blk_mq_sched_try_merge(q, bio);
ret = blk_mq_sched_try_merge(q, bio, &free);
spin_unlock(&dd->lock);
if (free)
blk_mq_free_request(free);
return ret;
}
@ -395,10 +399,7 @@ static void dd_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
blk_mq_sched_request_inserted(rq);
if (blk_mq_sched_bypass_insert(hctx, rq))
return;
if (at_head || rq->cmd_type != REQ_TYPE_FS) {
if (at_head || blk_rq_is_passthrough(rq)) {
if (at_head)
list_add(&rq->queuelist, &dd->dispatch);
else

83
block/scsi_ioctl.c
View File

@ -230,15 +230,17 @@ EXPORT_SYMBOL(blk_verify_command);
static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
struct sg_io_hdr *hdr, fmode_t mode)
{
if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
struct scsi_request *req = scsi_req(rq);
if (copy_from_user(req->cmd, hdr->cmdp, hdr->cmd_len))
return -EFAULT;
if (blk_verify_command(rq->cmd, mode & FMODE_WRITE))
if (blk_verify_command(req->cmd, mode & FMODE_WRITE))
return -EPERM;
/*
* fill in request structure
*/
rq->cmd_len = hdr->cmd_len;
req->cmd_len = hdr->cmd_len;
rq->timeout = msecs_to_jiffies(hdr->timeout);
if (!rq->timeout)
@ -254,6 +256,7 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
struct bio *bio)
{
struct scsi_request *req = scsi_req(rq);
int r, ret = 0;
/*
@ -267,13 +270,13 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
hdr->info = 0;
if (hdr->masked_status || hdr->host_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
hdr->resid = rq->resid_len;
hdr->resid = req->resid_len;
hdr->sb_len_wr = 0;
if (rq->sense_len && hdr->sbp) {
int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
if (req->sense_len && hdr->sbp) {
int len = min((unsigned int) hdr->mx_sb_len, req->sense_len);
if (!copy_to_user(hdr->sbp, rq->sense, len))
if (!copy_to_user(hdr->sbp, req->sense, len))
hdr->sb_len_wr = len;
else
ret = -EFAULT;
@ -294,7 +297,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
int writing = 0;
int at_head = 0;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct scsi_request *req;
struct bio *bio;
if (hdr->interface_id != 'S')
@ -318,14 +321,16 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
at_head = 1;
ret = -ENOMEM;
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
rq = blk_get_request(q, writing ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN,
GFP_KERNEL);
if (IS_ERR(rq))
return PTR_ERR(rq);
blk_rq_set_block_pc(rq);
req = scsi_req(rq);
scsi_req_init(rq);
if (hdr->cmd_len > BLK_MAX_CDB) {
rq->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
if (!rq->cmd)
req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
if (!req->cmd)
goto out_put_request;
}
@ -357,9 +362,6 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
goto out_free_cdb;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
start_time = jiffies;
@ -375,8 +377,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
ret = blk_complete_sghdr_rq(rq, hdr, bio);
out_free_cdb:
if (rq->cmd != rq->__cmd)
kfree(rq->cmd);
scsi_req_free_cmd(req);
out_put_request:
blk_put_request(rq);
return ret;
@ -420,9 +421,10 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
struct scsi_ioctl_command __user *sic)
{
struct request *rq;
struct scsi_request *req;
int err;
unsigned int in_len, out_len, bytes, opcode, cmdlen;
char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
char *buffer = NULL;
if (!sic)
return -EINVAL;
@ -447,12 +449,14 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
}
rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_RECLAIM);
rq = blk_get_request(q, in_len ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN,
__GFP_RECLAIM);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto error_free_buffer;
}
blk_rq_set_block_pc(rq);
req = scsi_req(rq);
scsi_req_init(rq);
cmdlen = COMMAND_SIZE(opcode);
@ -460,14 +464,14 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
* get command and data to send to device, if any
*/
err = -EFAULT;
rq->cmd_len = cmdlen;
if (copy_from_user(rq->cmd, sic->data, cmdlen))
req->cmd_len = cmdlen;
if (copy_from_user(req->cmd, sic->data, cmdlen))
goto error;
if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
goto error;
err = blk_verify_command(rq->cmd, mode & FMODE_WRITE);
err = blk_verify_command(req->cmd, mode & FMODE_WRITE);
if (err)
goto error;
@ -503,18 +507,14 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
goto error;
}
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
blk_execute_rq(q, disk, rq, 0);
err = rq->errors & 0xff; /* only 8 bit SCSI status */
if (err) {
if (rq->sense_len && rq->sense) {
bytes = (OMAX_SB_LEN > rq->sense_len) ?
rq->sense_len : OMAX_SB_LEN;
if (copy_to_user(sic->data, rq->sense, bytes))
if (req->sense_len && req->sense) {
bytes = (OMAX_SB_LEN > req->sense_len) ?
req->sense_len : OMAX_SB_LEN;
if (copy_to_user(sic->data, req->sense, bytes))
err = -EFAULT;
}
} else {
@ -539,14 +539,14 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
struct request *rq;
int err;
rq = blk_get_request(q, WRITE, __GFP_RECLAIM);
rq = blk_get_request(q, REQ_OP_SCSI_OUT, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
blk_rq_set_block_pc(rq);
scsi_req_init(rq);
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
rq->cmd[0] = cmd;
rq->cmd[4] = data;
rq->cmd_len = 6;
scsi_req(rq)->cmd[0] = cmd;
scsi_req(rq)->cmd[4] = data;
scsi_req(rq)->cmd_len = 6;
err = blk_execute_rq(q, bd_disk, rq, 0);
blk_put_request(rq);
@ -743,6 +743,17 @@ int scsi_cmd_blk_ioctl(struct block_device *bd, fmode_t mode,
}
EXPORT_SYMBOL(scsi_cmd_blk_ioctl);
void scsi_req_init(struct request *rq)
{
struct scsi_request *req = scsi_req(rq);
memset(req->__cmd, 0, sizeof(req->__cmd));
req->cmd = req->__cmd;
req->cmd_len = BLK_MAX_CDB;
req->sense_len = 0;
}
EXPORT_SYMBOL(scsi_req_init);
static int __init blk_scsi_ioctl_init(void)
{
blk_set_cmd_filter_defaults(&blk_default_cmd_filter);

4
drivers/ata/libata-scsi.c
View File

@ -1265,13 +1265,13 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev)
*/
static int atapi_drain_needed(struct request *rq)
{
if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
if (likely(!blk_rq_is_passthrough(rq)))
return 0;
if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
return 0;
return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
}
static int ata_scsi_dev_config(struct scsi_device *sdev,

13
drivers/block/Kconfig
View File

@ -69,6 +69,7 @@ config AMIGA_Z2RAM
config GDROM
tristate "SEGA Dreamcast GD-ROM drive"
depends on SH_DREAMCAST
select BLK_SCSI_REQUEST # only for the generic cdrom code
help
A standard SEGA Dreamcast comes with a modified CD ROM drive called a
"GD-ROM" by SEGA to signify it is capable of reading special disks
@ -114,6 +115,7 @@ config BLK_CPQ_CISS_DA
tristate "Compaq Smart Array 5xxx support"
depends on PCI
select CHECK_SIGNATURE
select BLK_SCSI_REQUEST
help
This is the driver for Compaq Smart Array 5xxx controllers.
Everyone using these boards should say Y here.
@ -386,6 +388,7 @@ config BLK_DEV_RAM_DAX
config CDROM_PKTCDVD
tristate "Packet writing on CD/DVD media (DEPRECATED)"
depends on !UML
select BLK_SCSI_REQUEST
help
Note: This driver is deprecated and will be removed from the
kernel in the near future!
@ -501,6 +504,16 @@ config VIRTIO_BLK
This is the virtual block driver for virtio. It can be used with
lguest or QEMU based VMMs (like KVM or Xen). Say Y or M.
config VIRTIO_BLK_SCSI
bool "SCSI passthrough request for the Virtio block driver"
depends on VIRTIO_BLK
select BLK_SCSI_REQUEST
---help---
Enable support for SCSI passthrough (e.g. the SG_IO ioctl) on
virtio-blk devices. This is only supported for the legacy
virtio protocol and not enabled by default by any hypervisor.
Your probably want to virtio-scsi instead.
config BLK_DEV_HD
bool "Very old hard disk (MFM/RLL/IDE) driver"
depends on HAVE_IDE

4
drivers/block/aoe/aoeblk.c
View File

@ -396,8 +396,8 @@ aoeblk_gdalloc(void *vp)
WARN_ON(d->gd);
WARN_ON(d->flags & DEVFL_UP);
blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS);
q->backing_dev_info.name = "aoe";
q->backing_dev_info.ra_pages = READ_AHEAD / PAGE_SIZE;
q->backing_dev_info->name = "aoe";
q->backing_dev_info->ra_pages = READ_AHEAD / PAGE_SIZE;
d->bufpool = mp;
d->blkq = gd->queue = q;
q->queuedata = d;

77
drivers/block/cciss.c
View File

@ -52,6 +52,7 @@
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_request.h>
#include <linux/cdrom.h>
#include <linux/scatterlist.h>
#include <linux/kthread.h>
@ -1853,8 +1854,8 @@ static void cciss_softirq_done(struct request *rq)
dev_dbg(&h->pdev->dev, "Done with %p\n", rq);
/* set the residual count for pc requests */
if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
rq->resid_len = c->err_info->ResidualCnt;
if (blk_rq_is_passthrough(rq))
scsi_req(rq)->resid_len = c->err_info->ResidualCnt;
blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
@ -1941,9 +1942,16 @@ static void cciss_get_serial_no(ctlr_info_t *h, int logvol,
static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
int drv_index)
{
disk->queue = blk_init_queue(do_cciss_request, &h->lock);
disk->queue = blk_alloc_queue(GFP_KERNEL);
if (!disk->queue)
goto init_queue_failure;
disk->queue->cmd_size = sizeof(struct scsi_request);
disk->queue->request_fn = do_cciss_request;
disk->queue->queue_lock = &h->lock;
if (blk_init_allocated_queue(disk->queue) < 0)
goto cleanup_queue;
sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
disk->major = h->major;
disk->first_minor = drv_index << NWD_SHIFT;
@ -3075,7 +3083,7 @@ static inline int evaluate_target_status(ctlr_info_t *h,
driver_byte = DRIVER_OK;
msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
if (blk_rq_is_passthrough(cmd->rq))
host_byte = DID_PASSTHROUGH;
else
host_byte = DID_OK;
@ -3084,7 +3092,7 @@ static inline int evaluate_target_status(ctlr_info_t *h,
host_byte, driver_byte);
if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
if (!blk_rq_is_passthrough(cmd->rq))
dev_warn(&h->pdev->dev, "cmd %p "
"has SCSI Status 0x%x\n",
cmd, cmd->err_info->ScsiStatus);
@ -3095,31 +3103,23 @@ static inline int evaluate_target_status(ctlr_info_t *h,
sense_key = 0xf & cmd->err_info->SenseInfo[2];
/* no status or recovered error */
if (((sense_key == 0x0) || (sense_key == 0x1)) &&
(cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
!blk_rq_is_passthrough(cmd->rq))
error_value = 0;
if (check_for_unit_attention(h, cmd)) {
*retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
*retry_cmd = !blk_rq_is_passthrough(cmd->rq);
return 0;
}
/* Not SG_IO or similar? */
if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
if (!blk_rq_is_passthrough(cmd->rq)) {
if (error_value != 0)
dev_warn(&h->pdev->dev, "cmd %p has CHECK CONDITION"
" sense key = 0x%x\n", cmd, sense_key);
return error_value;
}
/* SG_IO or similar, copy sense data back */
if (cmd->rq->sense) {
if (cmd->rq->sense_len > cmd->err_info->SenseLen)
cmd->rq->sense_len = cmd->err_info->SenseLen;
memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
cmd->rq->sense_len);
} else
cmd->rq->sense_len = 0;
scsi_req(cmd->rq)->sense_len = cmd->err_info->SenseLen;
return error_value;
}
@ -3146,15 +3146,14 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
break;
case CMD_DATA_UNDERRUN:
if (cmd->rq->cmd_type == REQ_TYPE_FS) {
if (!blk_rq_is_passthrough(cmd->rq)) {
dev_warn(&h->pdev->dev, "cmd %p has"
" completed with data underrun "
"reported\n", cmd);
cmd->rq->resid_len = cmd->err_info->ResidualCnt;
}
break;
case CMD_DATA_OVERRUN:
if (cmd->rq->cmd_type == REQ_TYPE_FS)
if (!blk_rq_is_passthrough(cmd->rq))
dev_warn(&h->pdev->dev, "cciss: cmd %p has"
" completed with data overrun "
"reported\n", cmd);
@ -3164,7 +3163,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
"reported invalid\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_PROTOCOL_ERR:
@ -3172,7 +3171,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
"protocol error\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_HARDWARE_ERR:
@ -3180,7 +3179,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
" hardware error\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_CONNECTION_LOST:
@ -3188,7 +3187,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
"connection lost\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_ABORTED:
@ -3196,7 +3195,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
"aborted\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ABORT);
break;
case CMD_ABORT_FAILED:
@ -3204,7 +3203,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
"abort failed\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_UNSOLICITED_ABORT:
@ -3219,21 +3218,21 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
"%p retried too many times\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ABORT);
break;
case CMD_TIMEOUT:
dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_UNABORTABLE:
dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
default:
@ -3242,7 +3241,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
cmd->err_info->CommandStatus);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
}
@ -3395,7 +3394,9 @@ static void do_cciss_request(struct request_queue *q)
c->Header.SGList = h->max_cmd_sgentries;
set_performant_mode(h, c);
if (likely(creq->cmd_type == REQ_TYPE_FS)) {
switch (req_op(creq)) {
case REQ_OP_READ:
case REQ_OP_WRITE:
if(h->cciss_read == CCISS_READ_10) {
c->Request.CDB[1] = 0;
c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
@ -3425,12 +3426,16 @@ static void do_cciss_request(struct request_queue *q)
c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
c->Request.CDB[14] = c->Request.CDB[15] = 0;
}
} else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
c->Request.CDBLen = creq->cmd_len;
memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
} else {
break;
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
c->Request.CDBLen = scsi_req(creq)->cmd_len;
memcpy(c->Request.CDB, scsi_req(creq)->cmd, BLK_MAX_CDB);
scsi_req(creq)->sense = c->err_info->SenseInfo;
break;
default:
dev_warn(&h->pdev->dev, "bad request type %d\n",
creq->cmd_type);
creq->cmd_flags);
BUG();
}

6
drivers/block/drbd/drbd_main.c
View File

@ -2462,7 +2462,7 @@ static int drbd_congested(void *congested_data, int bdi_bits)
if (get_ldev(device)) {
q = bdev_get_queue(device->ldev->backing_bdev);
r = bdi_congested(&q->backing_dev_info, bdi_bits);
r = bdi_congested(q->backing_dev_info, bdi_bits);
put_ldev(device);
if (r)
reason = 'b';
@ -2834,8 +2834,8 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
/* we have no partitions. we contain only ourselves. */
device->this_bdev->bd_contains = device->this_bdev;
q->backing_dev_info.congested_fn = drbd_congested;
q->backing_dev_info.congested_data = device;
q->backing_dev_info->congested_fn = drbd_congested;
q->backing_dev_info->congested_data = device;
blk_queue_make_request(q, drbd_make_request);
blk_queue_write_cache(q, true, true);

12
drivers/block/drbd/drbd_nl.c
View File

@ -1328,11 +1328,13 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi
if (b) {
blk_queue_stack_limits(q, b);
if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) {
if (q->backing_dev_info->ra_pages !=
b->backing_dev_info->ra_pages) {
drbd_info(device, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
q->backing_dev_info.ra_pages,
b->backing_dev_info.ra_pages);
q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages;
q->backing_dev_info->ra_pages,
b->backing_dev_info->ra_pages);
q->backing_dev_info->ra_pages =
b->backing_dev_info->ra_pages;
}
}
fixup_discard_if_not_supported(q);
@ -3345,7 +3347,7 @@ static void device_to_statistics(struct device_statistics *s,
s->dev_disk_flags = md->flags;
q = bdev_get_queue(device->ldev->backing_bdev);
s->dev_lower_blocked =
bdi_congested(&q->backing_dev_info,
bdi_congested(q->backing_dev_info,
(1 << WB_async_congested) |
(1 << WB_sync_congested));
put_ldev(device);

2
drivers/block/drbd/drbd_proc.c
View File

@ -288,7 +288,7 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
seq_printf(seq, "%2d: cs:Unconfigured\n", i);
} else {
/* reset device->congestion_reason */
bdi_rw_congested(&device->rq_queue->backing_dev_info);
bdi_rw_congested(device->rq_queue->backing_dev_info);
nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
wp = nc ? nc->wire_protocol - DRBD_PROT_A + 'A' : ' ';

2
drivers/block/drbd/drbd_req.c
View File

@ -938,7 +938,7 @@ static bool remote_due_to_read_balancing(struct drbd_device *device, sector_t se
switch (rbm) {
case RB_CONGESTED_REMOTE:
bdi = &device->ldev->backing_bdev->bd_disk->queue->backing_dev_info;
bdi = device->ldev->backing_bdev->bd_disk->queue->backing_dev_info;
return bdi_read_congested(bdi);
case RB_LEAST_PENDING:
return atomic_read(&device->local_cnt) >

4
drivers/block/floppy.c
View File

@ -2900,8 +2900,8 @@ static void do_fd_request(struct request_queue *q)
return;
if (WARN(atomic_read(&usage_count) == 0,
"warning: usage count=0, current_req=%p sect=%ld type=%x flags=%llx\n",
current_req, (long)blk_rq_pos(current_req), current_req->cmd_type,
"warning: usage count=0, current_req=%p sect=%ld flags=%llx\n",
current_req, (long)blk_rq_pos(current_req),
(unsigned long long) current_req->cmd_flags))
return;

45
drivers/block/hd.c
View File

@ -626,30 +626,29 @@ repeat:
req_data_dir(req) == READ ? "read" : "writ",
cyl, head, sec, nsect, bio_data(req->bio));
#endif
if (req->cmd_type == REQ_TYPE_FS) {
switch (rq_data_dir(req)) {
case READ:
hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_READ,
&read_intr);
if (reset)
goto repeat;
break;
case WRITE:
hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_WRITE,
&write_intr);
if (reset)
goto repeat;
if (wait_DRQ()) {
bad_rw_intr();
goto repeat;
}
outsw(HD_DATA, bio_data(req->bio), 256);
break;
default:
printk("unknown hd-command\n");
hd_end_request_cur(-EIO);
break;
switch (req_op(req)) {
case REQ_OP_READ:
hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_READ,
&read_intr);
if (reset)
goto repeat;
break;
case REQ_OP_WRITE:
hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_WRITE,
&write_intr);
if (reset)
goto repeat;
if (wait_DRQ()) {
bad_rw_intr();
goto repeat;
}
outsw(HD_DATA, bio_data(req->bio), 256);
break;
default:
printk("unknown hd-command\n");
hd_end_request_cur(-EIO);
break;
}
}

31
drivers/block/mg_disk.c
View File

@ -670,15 +670,17 @@ static void mg_request_poll(struct request_queue *q)
break;
}
if (unlikely(host->req->cmd_type != REQ_TYPE_FS)) {
mg_end_request_cur(host, -EIO);
continue;
}
if (rq_data_dir(host->req) == READ)
switch (req_op(host->req)) {
case REQ_OP_READ:
mg_read(host->req);
else
break;
case REQ_OP_WRITE:
mg_write(host->req);
break;
default:
mg_end_request_cur(host, -EIO);
break;
}
}
}
@ -687,13 +689,15 @@ static unsigned int mg_issue_req(struct request *req,
unsigned int sect_num,
unsigned int sect_cnt)
{
if (rq_data_dir(req) == READ) {
switch (req_op(host->req)) {
case REQ_OP_READ:
if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr)
!= MG_ERR_NONE) {
mg_bad_rw_intr(host);
return host->error;
}
} else {
break;
case REQ_OP_WRITE:
/* TODO : handler */
outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr)
@ -712,6 +716,10 @@ static unsigned int mg_issue_req(struct request *req,
mod_timer(&host->timer, jiffies + 3 * HZ);
outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
MG_REG_COMMAND);
break;
default:
mg_end_request_cur(host, -EIO);
break;
}
return MG_ERR_NONE;
}
@ -753,11 +761,6 @@ static void mg_request(struct request_queue *q)
continue;
}
if (unlikely(req->cmd_type != REQ_TYPE_FS)) {
mg_end_request_cur(host, -EIO);
continue;
}
if (!mg_issue_req(req, host, sect_num, sect_cnt))
return;
}

260
drivers/block/nbd.c
View File

@ -41,6 +41,9 @@
#include <linux/nbd.h>
static DEFINE_IDR(nbd_index_idr);
static DEFINE_MUTEX(nbd_index_mutex);
struct nbd_sock {
struct socket *sock;
struct mutex tx_lock;
@ -89,8 +92,9 @@ static struct dentry *nbd_dbg_dir;
#define NBD_MAGIC 0x68797548
static unsigned int nbds_max = 16;
static struct nbd_device *nbd_dev;
static int max_part;
static struct workqueue_struct *recv_workqueue;
static int part_shift;
static inline struct device *nbd_to_dev(struct nbd_device *nbd)
{
@ -193,13 +197,6 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
set_bit(NBD_TIMEDOUT, &nbd->runtime_flags);
req->errors++;
/*
* If our disconnect packet times out then we're already holding the
* config_lock and could deadlock here, so just set an error and return,
* we'll handle shutting everything down later.
*/
if (req->cmd_type == REQ_TYPE_DRV_PRIV)
return BLK_EH_HANDLED;
mutex_lock(&nbd->config_lock);
sock_shutdown(nbd);
mutex_unlock(&nbd->config_lock);
@ -278,14 +275,29 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
u32 type;
u32 tag = blk_mq_unique_tag(req);
if (req_op(req) == REQ_OP_DISCARD)
switch (req_op(req)) {
case REQ_OP_DISCARD:
type = NBD_CMD_TRIM;
else if (req_op(req) == REQ_OP_FLUSH)
break;
case REQ_OP_FLUSH:
type = NBD_CMD_FLUSH;
else if (rq_data_dir(req) == WRITE)
break;
case REQ_OP_WRITE:
type = NBD_CMD_WRITE;
else
break;
case REQ_OP_READ:
type = NBD_CMD_READ;
break;
default:
return -EIO;
}
if (rq_data_dir(req) == WRITE &&
(nbd->flags & NBD_FLAG_READ_ONLY)) {
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Write on read-only\n");
return -EIO;
}
memset(&request, 0, sizeof(request));
request.magic = htonl(NBD_REQUEST_MAGIC);
@ -510,18 +522,6 @@ static void nbd_handle_cmd(struct nbd_cmd *cmd, int index)
goto error_out;
}
if (req->cmd_type != REQ_TYPE_FS &&
req->cmd_type != REQ_TYPE_DRV_PRIV)
goto error_out;
if (req->cmd_type == REQ_TYPE_FS &&
rq_data_dir(req) == WRITE &&
(nbd->flags & NBD_FLAG_READ_ONLY)) {
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Write on read-only\n");
goto error_out;
}
req->errors = 0;
nsock = nbd->socks[index];
@ -785,7 +785,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
INIT_WORK(&args[i].work, recv_work);
args[i].nbd = nbd;
args[i].index = i;
queue_work(system_long_wq, &args[i].work);
queue_work(recv_workqueue, &args[i].work);
}
wait_event_interruptible(nbd->recv_wq,
atomic_read(&nbd->recv_threads) == 0);
@ -996,6 +996,103 @@ static struct blk_mq_ops nbd_mq_ops = {
.timeout = nbd_xmit_timeout,
};
static void nbd_dev_remove(struct nbd_device *nbd)
{
struct gendisk *disk = nbd->disk;
nbd->magic = 0;
if (disk) {
del_gendisk(disk);
blk_cleanup_queue(disk->queue);
blk_mq_free_tag_set(&nbd->tag_set);
put_disk(disk);
}
kfree(nbd);
}
static int nbd_dev_add(int index)
{
struct nbd_device *nbd;
struct gendisk *disk;
struct request_queue *q;
int err = -ENOMEM;
nbd = kzalloc(sizeof(struct nbd_device), GFP_KERNEL);
if (!nbd)
goto out;
disk = alloc_disk(1 << part_shift);
if (!disk)
goto out_free_nbd;
if (index >= 0) {
err = idr_alloc(&nbd_index_idr, nbd, index, index + 1,
GFP_KERNEL);
if (err == -ENOSPC)
err = -EEXIST;
} else {
err = idr_alloc(&nbd_index_idr, nbd, 0, 0, GFP_KERNEL);
if (err >= 0)
index = err;
}
if (err < 0)
goto out_free_disk;
nbd->disk = disk;
nbd->tag_set.ops = &nbd_mq_ops;
nbd->tag_set.nr_hw_queues = 1;
nbd->tag_set.queue_depth = 128;
nbd->tag_set.numa_node = NUMA_NO_NODE;
nbd->tag_set.cmd_size = sizeof(struct nbd_cmd);
nbd->tag_set.flags = BLK_MQ_F_SHOULD_MERGE |
BLK_MQ_F_SG_MERGE | BLK_MQ_F_BLOCKING;
nbd->tag_set.driver_data = nbd;
err = blk_mq_alloc_tag_set(&nbd->tag_set);
if (err)
goto out_free_idr;
q = blk_mq_init_queue(&nbd->tag_set);
if (IS_ERR(q)) {
err = PTR_ERR(q);
goto out_free_tags;
}
disk->queue = q;
/*
* Tell the block layer that we are not a rotational device
*/
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, disk->queue);
queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, disk->queue);
disk->queue->limits.discard_granularity = 512;
blk_queue_max_discard_sectors(disk->queue, UINT_MAX);
disk->queue->limits.discard_zeroes_data = 0;
blk_queue_max_hw_sectors(disk->queue, 65536);
disk->queue->limits.max_sectors = 256;
nbd->magic = NBD_MAGIC;
mutex_init(&nbd->config_lock);
disk->major = NBD_MAJOR;
disk->first_minor = index << part_shift;
disk->fops = &nbd_fops;
disk->private_data = nbd;
sprintf(disk->disk_name, "nbd%d", index);
init_waitqueue_head(&nbd->recv_wq);
nbd_reset(nbd);
add_disk(disk);
return index;
out_free_tags:
blk_mq_free_tag_set(&nbd->tag_set);
out_free_idr:
idr_remove(&nbd_index_idr, index);
out_free_disk:
put_disk(disk);
out_free_nbd:
kfree(nbd);
out:
return err;
}
/*
* And here should be modules and kernel interface
* (Just smiley confuses emacs :-)
@ -1003,9 +1100,7 @@ static struct blk_mq_ops nbd_mq_ops = {
static int __init nbd_init(void)
{
int err = -ENOMEM;
int i;
int part_shift;
BUILD_BUG_ON(sizeof(struct nbd_request) != 28);
@ -1034,111 +1129,38 @@ static int __init nbd_init(void)
if (nbds_max > 1UL << (MINORBITS - part_shift))
return -EINVAL;
nbd_dev = kcalloc(nbds_max, sizeof(*nbd_dev), GFP_KERNEL);
if (!nbd_dev)
recv_workqueue = alloc_workqueue("knbd-recv",
WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
if (!recv_workqueue)
return -ENOMEM;
for (i = 0; i < nbds_max; i++) {
struct request_queue *q;
struct gendisk *disk = alloc_disk(1 << part_shift);
if (!disk)
goto out;
nbd_dev[i].disk = disk;
nbd_dev[i].tag_set.ops = &nbd_mq_ops;
nbd_dev[i].tag_set.nr_hw_queues = 1;
nbd_dev[i].tag_set.queue_depth = 128;
nbd_dev[i].tag_set.numa_node = NUMA_NO_NODE;
nbd_dev[i].tag_set.cmd_size = sizeof(struct nbd_cmd);
nbd_dev[i].tag_set.flags = BLK_MQ_F_SHOULD_MERGE |
BLK_MQ_F_SG_MERGE | BLK_MQ_F_BLOCKING;
nbd_dev[i].tag_set.driver_data = &nbd_dev[i];
err = blk_mq_alloc_tag_set(&nbd_dev[i].tag_set);
if (err) {
put_disk(disk);
goto out;
}
/*
* The new linux 2.5 block layer implementation requires
* every gendisk to have its very own request_queue struct.
* These structs are big so we dynamically allocate them.
*/
q = blk_mq_init_queue(&nbd_dev[i].tag_set);
if (IS_ERR(q)) {
blk_mq_free_tag_set(&nbd_dev[i].tag_set);
put_disk(disk);
goto out;
}
disk->queue = q;
/*
* Tell the block layer that we are not a rotational device
*/
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, disk->queue);
queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, disk->queue);
disk->queue->limits.discard_granularity = 512;
blk_queue_max_discard_sectors(disk->queue, UINT_MAX);
disk->queue->limits.discard_zeroes_data = 0;
blk_queue_max_hw_sectors(disk->queue, 65536);
disk->queue->limits.max_sectors = 256;
}
if (register_blkdev(NBD_MAJOR, "nbd")) {
err = -EIO;
goto out;
}
printk(KERN_INFO "nbd: registered device at major %d\n", NBD_MAJOR);
if (register_blkdev(NBD_MAJOR, "nbd"))
return -EIO;
nbd_dbg_init();
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = nbd_dev[i].disk;
nbd_dev[i].magic = NBD_MAGIC;
mutex_init(&nbd_dev[i].config_lock);
disk->major = NBD_MAJOR;
disk->first_minor = i << part_shift;
disk->fops = &nbd_fops;
disk->private_data = &nbd_dev[i];
sprintf(disk->disk_name, "nbd%d", i);
init_waitqueue_head(&nbd_dev[i].recv_wq);
nbd_reset(&nbd_dev[i]);
add_disk(disk);
}
mutex_lock(&nbd_index_mutex);
for (i = 0; i < nbds_max; i++)
nbd_dev_add(i);
mutex_unlock(&nbd_index_mutex);
return 0;
}
static int nbd_exit_cb(int id, void *ptr, void *data)
{
struct nbd_device *nbd = ptr;
nbd_dev_remove(nbd);
return 0;
out:
while (i--) {
blk_mq_free_tag_set(&nbd_dev[i].tag_set);
blk_cleanup_queue(nbd_dev[i].disk->queue);
put_disk(nbd_dev[i].disk);
}
kfree(nbd_dev);
return err;
}
static void __exit nbd_cleanup(void)
{
int i;
nbd_dbg_close();
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = nbd_dev[i].disk;
nbd_dev[i].magic = 0;
if (disk) {
del_gendisk(disk);
blk_cleanup_queue(disk->queue);
blk_mq_free_tag_set(&nbd_dev[i].tag_set);
put_disk(disk);
}
}
idr_for_each(&nbd_index_idr, &nbd_exit_cb, NULL);
idr_destroy(&nbd_index_idr);
destroy_workqueue(recv_workqueue);
unregister_blkdev(NBD_MAJOR, "nbd");
kfree(nbd_dev);
printk(KERN_INFO "nbd: unregistered device at major %d\n", NBD_MAJOR);
}
module_init(nbd_init);

4
drivers/block/null_blk.c
View File

@ -432,11 +432,11 @@ static int null_lnvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
struct request *rq;
struct bio *bio = rqd->bio;
rq = blk_mq_alloc_request(q, bio_data_dir(bio), 0);
rq = blk_mq_alloc_request(q,
op_is_write(bio_op(bio)) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
if (IS_ERR(rq))
return -ENOMEM;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->__sector = bio->bi_iter.bi_sector;
rq->ioprio = bio_prio(bio);

6
drivers/block/osdblk.c
View File

@ -308,12 +308,6 @@ static void osdblk_rq_fn(struct request_queue *q)
if (!rq)
break;
/* filter out block requests we don't understand */
if (rq->cmd_type != REQ_TYPE_FS) {
blk_end_request_all(rq, 0);
continue;
}
/* deduce our operation (read, write, flush) */
/* I wish the block layer simplified cmd_type/cmd_flags/cmd[]
* into a clearly defined set of RPC commands:

1
drivers/block/paride/Kconfig
View File

@ -25,6 +25,7 @@ config PARIDE_PD
config PARIDE_PCD
tristate "Parallel port ATAPI CD-ROMs"
depends on PARIDE
select BLK_SCSI_REQUEST # only for the generic cdrom code
---help---
This option enables the high-level driver for ATAPI CD-ROM devices
connected through a parallel port. If you chose to build PARIDE

15
drivers/block/paride/pd.c
View File

@ -439,18 +439,16 @@ static int pd_retries = 0; /* i/o error retry count */
static int pd_block; /* address of next requested block */
static int pd_count; /* number of blocks still to do */
static int pd_run; /* sectors in current cluster */
static int pd_cmd; /* current command READ/WRITE */
static char *pd_buf; /* buffer for request in progress */
static enum action do_pd_io_start(void)
{
if (pd_req->cmd_type == REQ_TYPE_DRV_PRIV) {
switch (req_op(pd_req)) {
case REQ_OP_DRV_IN:
phase = pd_special;
return pd_special();
}
pd_cmd = rq_data_dir(pd_req);
if (pd_cmd == READ || pd_cmd == WRITE) {
case REQ_OP_READ:
case REQ_OP_WRITE:
pd_block = blk_rq_pos(pd_req);
pd_count = blk_rq_cur_sectors(pd_req);
if (pd_block + pd_count > get_capacity(pd_req->rq_disk))
@ -458,7 +456,7 @@ static enum action do_pd_io_start(void)
pd_run = blk_rq_sectors(pd_req);
pd_buf = bio_data(pd_req->bio);
pd_retries = 0;
if (pd_cmd == READ)
if (req_op(pd_req) == REQ_OP_READ)
return do_pd_read_start();
else
return do_pd_write_start();
@ -723,11 +721,10 @@ static int pd_special_command(struct pd_unit *disk,
struct request *rq;
int err = 0;
rq = blk_get_request(disk->gd->queue, READ, __GFP_RECLAIM);
rq = blk_get_request(disk->gd->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->special = func;
err = blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);

12
drivers/block/pktcdvd.c
View File

@ -704,10 +704,10 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
int ret = 0;
rq = blk_get_request(q, (cgc->data_direction == CGC_DATA_WRITE) ?
WRITE : READ, __GFP_RECLAIM);
REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
blk_rq_set_block_pc(rq);
scsi_req_init(rq);
if (cgc->buflen) {
ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen,
@ -716,8 +716,8 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
goto out;
}
rq->cmd_len = COMMAND_SIZE(cgc->cmd[0]);
memcpy(rq->cmd, cgc->cmd, CDROM_PACKET_SIZE);
scsi_req(rq)->cmd_len = COMMAND_SIZE(cgc->cmd[0]);
memcpy(scsi_req(rq)->cmd, cgc->cmd, CDROM_PACKET_SIZE);
rq->timeout = 60*HZ;
if (cgc->quiet)
@ -1243,7 +1243,7 @@ try_next_bio:
&& pd->bio_queue_size <= pd->write_congestion_off);
spin_unlock(&pd->lock);
if (wakeup) {
clear_bdi_congested(&pd->disk->queue->backing_dev_info,
clear_bdi_congested(pd->disk->queue->backing_dev_info,
BLK_RW_ASYNC);
}
@ -2370,7 +2370,7 @@ static void pkt_make_request_write(struct request_queue *q, struct bio *bio)
spin_lock(&pd->lock);
if (pd->write_congestion_on > 0
&& pd->bio_queue_size >= pd->write_congestion_on) {
set_bdi_congested(&q->backing_dev_info, BLK_RW_ASYNC);
set_bdi_congested(q->backing_dev_info, BLK_RW_ASYNC);
do {
spin_unlock(&pd->lock);
congestion_wait(BLK_RW_ASYNC, HZ);

15
drivers/block/ps3disk.c
View File

@ -196,16 +196,19 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
while ((req = blk_fetch_request(q))) {
if (req_op(req) == REQ_OP_FLUSH) {
switch (req_op(req)) {
case REQ_OP_FLUSH:
if (ps3disk_submit_flush_request(dev, req))
break;
} else if (req->cmd_type == REQ_TYPE_FS) {
return;
break;
case REQ_OP_READ:
case REQ_OP_WRITE:
if (ps3disk_submit_request_sg(dev, req))
break;
} else {
return;
break;
default:
blk_dump_rq_flags(req, DEVICE_NAME " bad request");
__blk_end_request_all(req, -EIO);
continue;
}
}
}

24
drivers/block/rbd.c
View File

@ -4099,20 +4099,22 @@ static void rbd_queue_workfn(struct work_struct *work)
bool must_be_locked;
int result;
if (rq->cmd_type != REQ_TYPE_FS) {
dout("%s: non-fs request type %d\n", __func__,
(int) rq->cmd_type);
switch (req_op(rq)) {
case REQ_OP_DISCARD:
op_type = OBJ_OP_DISCARD;
break;
case REQ_OP_WRITE:
op_type = OBJ_OP_WRITE;
break;
case REQ_OP_READ:
op_type = OBJ_OP_READ;
break;
default:
dout("%s: non-fs request type %d\n", __func__, req_op(rq));
result = -EIO;
goto err;
}
if (req_op(rq) == REQ_OP_DISCARD)
op_type = OBJ_OP_DISCARD;
else if (req_op(rq) == REQ_OP_WRITE)
op_type = OBJ_OP_WRITE;
else
op_type = OBJ_OP_READ;
/* Ignore/skip any zero-length requests */
if (!length) {
@ -4524,7 +4526,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
q->limits.discard_zeroes_data = 1;
if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
q->backing_dev_info.capabilities |= BDI_CAP_STABLE_WRITES;
q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES;
disk->queue = q;

15
drivers/block/skd_main.c
View File

@ -1204,10 +1204,11 @@ static void skd_complete_special(struct skd_device *skdev,
static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode,
uint cmd_in, ulong arg)
{
int rc = 0;
static const int sg_version_num = 30527;
int rc = 0, timeout;
struct gendisk *disk = bdev->bd_disk;
struct skd_device *skdev = disk->private_data;
void __user *p = (void *)arg;
int __user *p = (int __user *)arg;
pr_debug("%s:%s:%d %s: CMD[%s] ioctl mode 0x%x, cmd 0x%x arg %0lx\n",
skdev->name, __func__, __LINE__,
@ -1218,12 +1219,18 @@ static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode,
switch (cmd_in) {
case SG_SET_TIMEOUT:
rc = get_user(timeout, p);
if (!rc)
disk->queue->sg_timeout = clock_t_to_jiffies(timeout);
break;
case SG_GET_TIMEOUT:
rc = jiffies_to_clock_t(disk->queue->sg_timeout);
break;
case SG_GET_VERSION_NUM:
rc = scsi_cmd_ioctl(disk->queue, disk, mode, cmd_in, p);
rc = put_user(sg_version_num, p);
break;
case SG_IO:
rc = skd_ioctl_sg_io(skdev, mode, p);
rc = skd_ioctl_sg_io(skdev, mode, (void __user *)arg);
break;
default:

4
drivers/block/sx8.c
View File

@ -567,7 +567,7 @@ static struct carm_request *carm_get_special(struct carm_host *host)
if (!crq)
return NULL;
rq = blk_get_request(host->oob_q, WRITE /* bogus */, GFP_KERNEL);
rq = blk_get_request(host->oob_q, REQ_OP_DRV_OUT, GFP_KERNEL);
if (IS_ERR(rq)) {
spin_lock_irqsave(&host->lock, flags);
carm_put_request(host, crq);
@ -620,7 +620,6 @@ static int carm_array_info (struct carm_host *host, unsigned int array_idx)
spin_unlock_irq(&host->lock);
DPRINTK("blk_execute_rq_nowait, tag == %u\n", idx);
crq->rq->cmd_type = REQ_TYPE_DRV_PRIV;
crq->rq->special = crq;
blk_execute_rq_nowait(host->oob_q, NULL, crq->rq, true, NULL);
@ -661,7 +660,6 @@ static int carm_send_special (struct carm_host *host, carm_sspc_t func)
crq->msg_bucket = (u32) rc;
DPRINTK("blk_execute_rq_nowait, tag == %u\n", idx);
crq->rq->cmd_type = REQ_TYPE_DRV_PRIV;
crq->rq->special = crq;
blk_execute_rq_nowait(host->oob_q, NULL, crq->rq, true, NULL);

209
drivers/block/virtio_blk.c
View File

@ -52,11 +52,13 @@ struct virtio_blk {
};
struct virtblk_req {
struct request *req;
struct virtio_blk_outhdr out_hdr;
struct virtio_scsi_inhdr in_hdr;
u8 status;
#ifdef CONFIG_VIRTIO_BLK_SCSI
struct scsi_request sreq; /* for SCSI passthrough, must be first */
u8 sense[SCSI_SENSE_BUFFERSIZE];
struct virtio_scsi_inhdr in_hdr;
#endif
struct virtio_blk_outhdr out_hdr;
u8 status;
struct scatterlist sg[];
};
@ -72,28 +74,23 @@ static inline int virtblk_result(struct virtblk_req *vbr)
}
}
static int __virtblk_add_req(struct virtqueue *vq,
struct virtblk_req *vbr,
struct scatterlist *data_sg,
bool have_data)
/*
* If this is a packet command we need a couple of additional headers. Behind
* the normal outhdr we put a segment with the scsi command block, and before
* the normal inhdr we put the sense data and the inhdr with additional status
* information.
*/
#ifdef CONFIG_VIRTIO_BLK_SCSI
static int virtblk_add_req_scsi(struct virtqueue *vq, struct virtblk_req *vbr,
struct scatterlist *data_sg, bool have_data)
{
struct scatterlist hdr, status, cmd, sense, inhdr, *sgs[6];
unsigned int num_out = 0, num_in = 0;
__virtio32 type = vbr->out_hdr.type & ~cpu_to_virtio32(vq->vdev, VIRTIO_BLK_T_OUT);
sg_init_one(&hdr, &vbr->out_hdr, sizeof(vbr->out_hdr));
sgs[num_out++] = &hdr;
/*
* If this is a packet command we need a couple of additional headers.
* Behind the normal outhdr we put a segment with the scsi command
* block, and before the normal inhdr we put the sense data and the
* inhdr with additional status information.
*/
if (type == cpu_to_virtio32(vq->vdev, VIRTIO_BLK_T_SCSI_CMD)) {
sg_init_one(&cmd, vbr->req->cmd, vbr->req->cmd_len);
sgs[num_out++] = &cmd;
}
sg_init_one(&cmd, vbr->sreq.cmd, vbr->sreq.cmd_len);
sgs[num_out++] = &cmd;
if (have_data) {
if (vbr->out_hdr.type & cpu_to_virtio32(vq->vdev, VIRTIO_BLK_T_OUT))
@ -102,12 +99,69 @@ static int __virtblk_add_req(struct virtqueue *vq,
sgs[num_out + num_in++] = data_sg;
}
if (type == cpu_to_virtio32(vq->vdev, VIRTIO_BLK_T_SCSI_CMD)) {
memcpy(vbr->sense, vbr->req->sense, SCSI_SENSE_BUFFERSIZE);
sg_init_one(&sense, vbr->sense, SCSI_SENSE_BUFFERSIZE);
sgs[num_out + num_in++] = &sense;
sg_init_one(&inhdr, &vbr->in_hdr, sizeof(vbr->in_hdr));
sgs[num_out + num_in++] = &inhdr;
sg_init_one(&sense, vbr->sense, SCSI_SENSE_BUFFERSIZE);
sgs[num_out + num_in++] = &sense;
sg_init_one(&inhdr, &vbr->in_hdr, sizeof(vbr->in_hdr));
sgs[num_out + num_in++] = &inhdr;
sg_init_one(&status, &vbr->status, sizeof(vbr->status));
sgs[num_out + num_in++] = &status;
return virtqueue_add_sgs(vq, sgs, num_out, num_in, vbr, GFP_ATOMIC);
}
static inline void virtblk_scsi_reques_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
struct virtio_blk *vblk = req->q->queuedata;
struct scsi_request *sreq = &vbr->sreq;
sreq->resid_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.residual);
sreq->sense_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.sense_len);
req->errors = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.errors);
}
static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long data)
{
struct gendisk *disk = bdev->bd_disk;
struct virtio_blk *vblk = disk->private_data;
/*
* Only allow the generic SCSI ioctls if the host can support it.
*/
if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI))
return -ENOTTY;
return scsi_cmd_blk_ioctl(bdev, mode, cmd,
(void __user *)data);
}
#else
static inline int virtblk_add_req_scsi(struct virtqueue *vq,
struct virtblk_req *vbr, struct scatterlist *data_sg,
bool have_data)
{
return -EIO;
}
static inline void virtblk_scsi_reques_done(struct request *req)
{
}
#define virtblk_ioctl NULL
#endif /* CONFIG_VIRTIO_BLK_SCSI */
static int virtblk_add_req(struct virtqueue *vq, struct virtblk_req *vbr,
struct scatterlist *data_sg, bool have_data)
{
struct scatterlist hdr, status, *sgs[3];
unsigned int num_out = 0, num_in = 0;
sg_init_one(&hdr, &vbr->out_hdr, sizeof(vbr->out_hdr));
sgs[num_out++] = &hdr;
if (have_data) {
if (vbr->out_hdr.type & cpu_to_virtio32(vq->vdev, VIRTIO_BLK_T_OUT))
sgs[num_out++] = data_sg;
else
sgs[num_out + num_in++] = data_sg;
}
sg_init_one(&status, &vbr->status, sizeof(vbr->status));
@ -119,15 +173,16 @@ static int __virtblk_add_req(struct virtqueue *vq,
static inline void virtblk_request_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
struct virtio_blk *vblk = req->q->queuedata;
int error = virtblk_result(vbr);
if (req->cmd_type == REQ_TYPE_BLOCK_PC) {
req->resid_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.residual);
req->sense_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.sense_len);
req->errors = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.errors);
} else if (req->cmd_type == REQ_TYPE_DRV_PRIV) {
switch (req_op(req)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
virtblk_scsi_reques_done(req);
break;
case REQ_OP_DRV_IN:
req->errors = (error != 0);
break;
}
blk_mq_end_request(req, error);
@ -146,7 +201,9 @@ static void virtblk_done(struct virtqueue *vq)
do {
virtqueue_disable_cb(vq);
while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
blk_mq_complete_request(vbr->req, vbr->req->errors);
struct request *req = blk_mq_rq_from_pdu(vbr);
blk_mq_complete_request(req, req->errors);
req_done = true;
}
if (unlikely(virtqueue_is_broken(vq)))
@ -170,49 +227,50 @@ static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
int qid = hctx->queue_num;
int err;
bool notify = false;
u32 type;
BUG_ON(req->nr_phys_segments + 2 > vblk->sg_elems);
vbr->req = req;
if (req_op(req) == REQ_OP_FLUSH) {
vbr->out_hdr.type = cpu_to_virtio32(vblk->vdev, VIRTIO_BLK_T_FLUSH);
vbr->out_hdr.sector = 0;
vbr->out_hdr.ioprio = cpu_to_virtio32(vblk->vdev, req_get_ioprio(vbr->req));
} else {
switch (req->cmd_type) {
case REQ_TYPE_FS:
vbr->out_hdr.type = 0;
vbr->out_hdr.sector = cpu_to_virtio64(vblk->vdev, blk_rq_pos(vbr->req));
vbr->out_hdr.ioprio = cpu_to_virtio32(vblk->vdev, req_get_ioprio(vbr->req));
break;
case REQ_TYPE_BLOCK_PC:
vbr->out_hdr.type = cpu_to_virtio32(vblk->vdev, VIRTIO_BLK_T_SCSI_CMD);
vbr->out_hdr.sector = 0;
vbr->out_hdr.ioprio = cpu_to_virtio32(vblk->vdev, req_get_ioprio(vbr->req));
break;
case REQ_TYPE_DRV_PRIV:
vbr->out_hdr.type = cpu_to_virtio32(vblk->vdev, VIRTIO_BLK_T_GET_ID);
vbr->out_hdr.sector = 0;
vbr->out_hdr.ioprio = cpu_to_virtio32(vblk->vdev, req_get_ioprio(vbr->req));
break;
default:
/* We don't put anything else in the queue. */
BUG();
}
switch (req_op(req)) {
case REQ_OP_READ:
case REQ_OP_WRITE:
type = 0;
break;
case REQ_OP_FLUSH:
type = VIRTIO_BLK_T_FLUSH;
break;
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
type = VIRTIO_BLK_T_SCSI_CMD;
break;
case REQ_OP_DRV_IN:
type = VIRTIO_BLK_T_GET_ID;
break;
default:
WARN_ON_ONCE(1);
return BLK_MQ_RQ_QUEUE_ERROR;
}
vbr->out_hdr.type = cpu_to_virtio32(vblk->vdev, type);
vbr->out_hdr.sector = type ?
0 : cpu_to_virtio64(vblk->vdev, blk_rq_pos(req));
vbr->out_hdr.ioprio = cpu_to_virtio32(vblk->vdev, req_get_ioprio(req));
blk_mq_start_request(req);
num = blk_rq_map_sg(hctx->queue, vbr->req, vbr->sg);
num = blk_rq_map_sg(hctx->queue, req, vbr->sg);
if (num) {
if (rq_data_dir(vbr->req) == WRITE)
if (rq_data_dir(req) == WRITE)
vbr->out_hdr.type |= cpu_to_virtio32(vblk->vdev, VIRTIO_BLK_T_OUT);
else
vbr->out_hdr.type |= cpu_to_virtio32(vblk->vdev, VIRTIO_BLK_T_IN);
}
spin_lock_irqsave(&vblk->vqs[qid].lock, flags);
err = __virtblk_add_req(vblk->vqs[qid].vq, vbr, vbr->sg, num);
if (req_op(req) == REQ_OP_SCSI_IN || req_op(req) == REQ_OP_SCSI_OUT)
err = virtblk_add_req_scsi(vblk->vqs[qid].vq, vbr, vbr->sg, num);
else
err = virtblk_add_req(vblk->vqs[qid].vq, vbr, vbr->sg, num);
if (err) {
virtqueue_kick(vblk->vqs[qid].vq);
blk_mq_stop_hw_queue(hctx);
@ -242,10 +300,9 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
struct request *req;
int err;
req = blk_get_request(q, READ, GFP_KERNEL);
req = blk_get_request(q, REQ_OP_DRV_IN, GFP_KERNEL);
if (IS_ERR(req))
return PTR_ERR(req);
req->cmd_type = REQ_TYPE_DRV_PRIV;
err = blk_rq_map_kern(q, req, id_str, VIRTIO_BLK_ID_BYTES, GFP_KERNEL);
if (err)
@ -257,22 +314,6 @@ out:
return err;
}
static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long data)
{
struct gendisk *disk = bdev->bd_disk;
struct virtio_blk *vblk = disk->private_data;
/*
* Only allow the generic SCSI ioctls if the host can support it.
*/
if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI))
return -ENOTTY;
return scsi_cmd_blk_ioctl(bdev, mode, cmd,
(void __user *)data);
}
/* We provide getgeo only to please some old bootloader/partitioning tools */
static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
{
@ -538,6 +579,9 @@ static int virtblk_init_request(void *data, struct request *rq,
struct virtio_blk *vblk = data;
struct virtblk_req *vbr = blk_mq_rq_to_pdu(rq);
#ifdef CONFIG_VIRTIO_BLK_SCSI
vbr->sreq.sense = vbr->sense;
#endif
sg_init_table(vbr->sg, vblk->sg_elems);
return 0;
}
@ -821,7 +865,10 @@ static const struct virtio_device_id id_table[] = {
static unsigned int features_legacy[] = {
VIRTIO_BLK_F_SEG_MAX, VIRTIO_BLK_F_SIZE_MAX, VIRTIO_BLK_F_GEOMETRY,
VIRTIO_BLK_F_RO, VIRTIO_BLK_F_BLK_SIZE, VIRTIO_BLK_F_SCSI,
VIRTIO_BLK_F_RO, VIRTIO_BLK_F_BLK_SIZE,
#ifdef CONFIG_VIRTIO_BLK_SCSI
VIRTIO_BLK_F_SCSI,
#endif
VIRTIO_BLK_F_FLUSH, VIRTIO_BLK_F_TOPOLOGY, VIRTIO_BLK_F_CONFIG_WCE,
VIRTIO_BLK_F_MQ,
}

2
drivers/block/xen-blkfront.c
View File

@ -865,7 +865,7 @@ static inline void flush_requests(struct blkfront_ring_info *rinfo)
static inline bool blkif_request_flush_invalid(struct request *req,
struct blkfront_info *info)
{
return ((req->cmd_type != REQ_TYPE_FS) ||
return (blk_rq_is_passthrough(req) ||
((req_op(req) == REQ_OP_FLUSH) &&
!info->feature_flush) ||
((req->cmd_flags & REQ_FUA) &&

2
drivers/block/xsysace.c
View File

@ -468,7 +468,7 @@ static struct request *ace_get_next_request(struct request_queue *q)
struct request *req;
while ((req = blk_peek_request(q)) != NULL) {
if (req->cmd_type == REQ_TYPE_FS)
if (!blk_rq_is_passthrough(req))
break;
blk_start_request(req);
__blk_end_request_all(req, -EIO);

2
drivers/block/zram/zram_drv.c
View File

@ -117,7 +117,7 @@ static void zram_revalidate_disk(struct zram *zram)
{
revalidate_disk(zram->disk);
/* revalidate_disk reset the BDI_CAP_STABLE_WRITES so set again */
zram->disk->queue->backing_dev_info.capabilities |=
zram->disk->queue->backing_dev_info->capabilities |=
BDI_CAP_STABLE_WRITES;
}

32
drivers/cdrom/cdrom.c
View File

@ -281,8 +281,8 @@
#include <linux/fcntl.h>
#include <linux/blkdev.h>
#include <linux/times.h>
#include <linux/uaccess.h>
#include <scsi/scsi_request.h>
/* used to tell the module to turn on full debugging messages */
static bool debug;
@ -2170,6 +2170,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
{
struct request_queue *q = cdi->disk->queue;
struct request *rq;
struct scsi_request *req;
struct bio *bio;
unsigned int len;
int nr, ret = 0;
@ -2188,12 +2189,13 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
len = nr * CD_FRAMESIZE_RAW;
rq = blk_get_request(q, READ, GFP_KERNEL);
rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
break;
}
blk_rq_set_block_pc(rq);
req = scsi_req(rq);
scsi_req_init(rq);
ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
if (ret) {
@ -2201,23 +2203,23 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
break;
}
rq->cmd[0] = GPCMD_READ_CD;
rq->cmd[1] = 1 << 2;
rq->cmd[2] = (lba >> 24) & 0xff;
rq->cmd[3] = (lba >> 16) & 0xff;
rq->cmd[4] = (lba >> 8) & 0xff;
rq->cmd[5] = lba & 0xff;
rq->cmd[6] = (nr >> 16) & 0xff;
rq->cmd[7] = (nr >> 8) & 0xff;
rq->cmd[8] = nr & 0xff;
rq->cmd[9] = 0xf8;
req->cmd[0] = GPCMD_READ_CD;
req->cmd[1] = 1 << 2;
req->cmd[2] = (lba >> 24) & 0xff;
req->cmd[3] = (lba >> 16) & 0xff;
req->cmd[4] = (lba >> 8) & 0xff;
req->cmd[5] = lba & 0xff;
req->cmd[6] = (nr >> 16) & 0xff;
req->cmd[7] = (nr >> 8) & 0xff;
req->cmd[8] = nr & 0xff;
req->cmd[9] = 0xf8;
rq->cmd_len = 12;
req->cmd_len = 12;
rq->timeout = 60 * HZ;
bio = rq->bio;
if (blk_execute_rq(q, cdi->disk, rq, 0)) {
struct request_sense *s = rq->sense;
struct request_sense *s = req->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
}

29
drivers/cdrom/gdrom.c
View File

@ -659,23 +659,24 @@ static void gdrom_request(struct request_queue *rq)
struct request *req;
while ((req = blk_fetch_request(rq)) != NULL) {
if (req->cmd_type != REQ_TYPE_FS) {
printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
__blk_end_request_all(req, -EIO);
continue;
}
if (rq_data_dir(req) != READ) {
switch (req_op(req)) {
case REQ_OP_READ:
/*
* Add to list of deferred work and then schedule
* workqueue.
*/
list_add_tail(&req->queuelist, &gdrom_deferred);
schedule_work(&work);
break;
case REQ_OP_WRITE:
pr_notice("Read only device - write request ignored\n");
__blk_end_request_all(req, -EIO);
continue;
break;
default:
printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
__blk_end_request_all(req, -EIO);
break;
}
/*
* Add to list of deferred work and then schedule
* workqueue.
*/
list_add_tail(&req->queuelist, &gdrom_deferred);
schedule_work(&work);
}
}

1
drivers/ide/Kconfig
View File

@ -10,6 +10,7 @@ menuconfig IDE
tristate "ATA/ATAPI/MFM/RLL support (DEPRECATED)"
depends on HAVE_IDE
depends on BLOCK
select BLK_SCSI_REQUEST
---help---
If you say Y here, your kernel will be able to manage ATA/(E)IDE and
ATAPI units. The most common cases are IDE hard drives and ATAPI

80
drivers/ide/ide-atapi.c
View File

@ -92,8 +92,9 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
struct request *rq;
int error;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = (char *)pc;
if (buf && bufflen) {
@ -103,9 +104,9 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
goto put_req;
}
memcpy(rq->cmd, pc->c, 12);
memcpy(scsi_req(rq)->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1;
error = blk_execute_rq(drive->queue, disk, rq, 0);
put_req:
blk_put_request(rq);
@ -171,7 +172,8 @@ EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
void ide_prep_sense(ide_drive_t *drive, struct request *rq)
{
struct request_sense *sense = &drive->sense_data;
struct request *sense_rq = &drive->sense_rq;
struct request *sense_rq = drive->sense_rq;
struct scsi_request *req = scsi_req(sense_rq);
unsigned int cmd_len, sense_len;
int err;
@ -191,12 +193,13 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
BUG_ON(sense_len > sizeof(*sense));
if (rq->cmd_type == REQ_TYPE_ATA_SENSE || drive->sense_rq_armed)
if (ata_sense_request(rq) || drive->sense_rq_armed)
return;
memset(sense, 0, sizeof(*sense));
blk_rq_init(rq->q, sense_rq);
scsi_req_init(sense_rq);
err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len,
GFP_NOIO);
@ -208,13 +211,14 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
}
sense_rq->rq_disk = rq->rq_disk;
sense_rq->cmd[0] = GPCMD_REQUEST_SENSE;
sense_rq->cmd[4] = cmd_len;
sense_rq->cmd_type = REQ_TYPE_ATA_SENSE;
sense_rq->cmd_flags = REQ_OP_DRV_IN;
ide_req(sense_rq)->type = ATA_PRIV_SENSE;
sense_rq->rq_flags |= RQF_PREEMPT;
req->cmd[0] = GPCMD_REQUEST_SENSE;
req->cmd[4] = cmd_len;
if (drive->media == ide_tape)
sense_rq->cmd[13] = REQ_IDETAPE_PC1;
req->cmd[13] = REQ_IDETAPE_PC1;
drive->sense_rq_armed = true;
}
@ -229,12 +233,12 @@ int ide_queue_sense_rq(ide_drive_t *drive, void *special)
return -ENOMEM;
}
drive->sense_rq.special = special;
drive->sense_rq->special = special;
drive->sense_rq_armed = false;
drive->hwif->rq = NULL;
elv_add_request(drive->queue, &drive->sense_rq, ELEVATOR_INSERT_FRONT);
elv_add_request(drive->queue, drive->sense_rq, ELEVATOR_INSERT_FRONT);
return 0;
}
EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
@ -247,14 +251,14 @@ EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
void ide_retry_pc(ide_drive_t *drive)
{
struct request *failed_rq = drive->hwif->rq;
struct request *sense_rq = &drive->sense_rq;
struct request *sense_rq = drive->sense_rq;
struct ide_atapi_pc *pc = &drive->request_sense_pc;
(void)ide_read_error(drive);
/* init pc from sense_rq */
ide_init_pc(pc);
memcpy(pc->c, sense_rq->cmd, 12);
memcpy(pc->c, scsi_req(sense_rq)->cmd, 12);
if (drive->media == ide_tape)
drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
@ -286,7 +290,7 @@ int ide_cd_expiry(ide_drive_t *drive)
* commands/drives support that. Let ide_timer_expiry keep polling us
* for these.
*/
switch (rq->cmd[0]) {
switch (scsi_req(rq)->cmd[0]) {
case GPCMD_BLANK:
case GPCMD_FORMAT_UNIT:
case GPCMD_RESERVE_RZONE_TRACK:
@ -297,7 +301,7 @@ int ide_cd_expiry(ide_drive_t *drive)
default:
if (!(rq->rq_flags & RQF_QUIET))
printk(KERN_INFO PFX "cmd 0x%x timed out\n",
rq->cmd[0]);
scsi_req(rq)->cmd[0]);
wait = 0;
break;
}
@ -307,15 +311,21 @@ EXPORT_SYMBOL_GPL(ide_cd_expiry);
int ide_cd_get_xferlen(struct request *rq)
{
switch (rq->cmd_type) {
case REQ_TYPE_FS:
return 32768;
case REQ_TYPE_ATA_SENSE:
case REQ_TYPE_BLOCK_PC:
case REQ_TYPE_ATA_PC:
return blk_rq_bytes(rq);
switch (req_op(rq)) {
default:
return 0;
return 32768;
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
return blk_rq_bytes(rq);
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
switch (ide_req(rq)->type) {
case ATA_PRIV_PC:
case ATA_PRIV_SENSE:
return blk_rq_bytes(rq);
default:
return 0;
}
}
}
EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
@ -374,7 +384,7 @@ int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len,
drive->name, __func__, ireason);
}
if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC)
if (dev_is_idecd(drive) && ata_pc_request(rq))
rq->rq_flags |= RQF_FAILED;
return 1;
@ -420,7 +430,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
? "write" : "read");
pc->flags |= PC_FLAG_DMA_ERROR;
} else
rq->resid_len = 0;
scsi_req(rq)->resid_len = 0;
debug_log("%s: DMA finished\n", drive->name);
}
@ -436,7 +446,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
local_irq_enable_in_hardirq();
if (drive->media == ide_tape &&
(stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE)
(stat & ATA_ERR) && scsi_req(rq)->cmd[0] == REQUEST_SENSE)
stat &= ~ATA_ERR;
if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) {
@ -446,7 +456,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
if (drive->media != ide_tape)
pc->rq->errors++;
if (rq->cmd[0] == REQUEST_SENSE) {
if (scsi_req(rq)->cmd[0] == REQUEST_SENSE) {
printk(KERN_ERR PFX "%s: I/O error in request "
"sense command\n", drive->name);
return ide_do_reset(drive);
@ -477,12 +487,12 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
if (uptodate == 0)
drive->failed_pc = NULL;
if (rq->cmd_type == REQ_TYPE_DRV_PRIV) {
if (ata_misc_request(rq)) {
rq->errors = 0;
error = 0;
} else {
if (rq->cmd_type != REQ_TYPE_FS && uptodate <= 0) {
if (blk_rq_is_passthrough(rq) && uptodate <= 0) {
if (rq->errors == 0)
rq->errors = -EIO;
}
@ -512,7 +522,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
ide_pio_bytes(drive, cmd, write, done);
/* Update transferred byte count */
rq->resid_len -= done;
scsi_req(rq)->resid_len -= done;
bcount -= done;
@ -520,7 +530,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
ide_pad_transfer(drive, write, bcount);
debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n",
rq->cmd[0], done, bcount, rq->resid_len);
rq->cmd[0], done, bcount, scsi_req(rq)->resid_len);
/* And set the interrupt handler again */
ide_set_handler(drive, ide_pc_intr, timeout);
@ -603,7 +613,7 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
if (dev_is_idecd(drive)) {
/* ATAPI commands get padded out to 12 bytes minimum */
cmd_len = COMMAND_SIZE(rq->cmd[0]);
cmd_len = COMMAND_SIZE(scsi_req(rq)->cmd[0]);
if (cmd_len < ATAPI_MIN_CDB_BYTES)
cmd_len = ATAPI_MIN_CDB_BYTES;
@ -650,7 +660,7 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
/* Send the actual packet */
if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
hwif->tp_ops->output_data(drive, NULL, scsi_req(rq)->cmd, cmd_len);
/* Begin DMA, if necessary */
if (dev_is_idecd(drive)) {
@ -695,7 +705,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
bytes, 63 * 1024));
/* We haven't transferred any data yet */
rq->resid_len = bcount;
scsi_req(rq)->resid_len = bcount;
if (pc->flags & PC_FLAG_DMA_ERROR) {
pc->flags &= ~PC_FLAG_DMA_ERROR;

190
drivers/ide/ide-cd.c
View File

@ -121,7 +121,7 @@ static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
* don't log START_STOP unit with LoEj set, since we cannot
* reliably check if drive can auto-close
*/
if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
break;
log = 1;
break;
@ -163,7 +163,7 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
* toc has not been recorded yet, it will fail with 05/24/00 (which is a
* confusing error)
*/
if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
if (sense->sense_key == 0x05 && sense->asc == 0x24)
return;
@ -176,7 +176,7 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
if (!sense->valid)
break;
if (failed_command == NULL ||
failed_command->cmd_type != REQ_TYPE_FS)
blk_rq_is_passthrough(failed_command))
break;
sector = (sense->information[0] << 24) |
(sense->information[1] << 16) |
@ -210,7 +210,7 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
{
/*
* For REQ_TYPE_ATA_SENSE, "rq->special" points to the original
* For ATA_PRIV_SENSE, "rq->special" points to the original
* failed request. Also, the sense data should be read
* directly from rq which might be different from the original
* sense buffer if it got copied during mapping.
@ -219,15 +219,12 @@ static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
void *sense = bio_data(rq->bio);
if (failed) {
if (failed->sense) {
/*
* Sense is always read into drive->sense_data.
* Copy back if the failed request has its
* sense pointer set.
*/
memcpy(failed->sense, sense, 18);
failed->sense_len = rq->sense_len;
}
/*
* Sense is always read into drive->sense_data, copy back to the
* original request.
*/
memcpy(scsi_req(failed)->sense, sense, 18);
scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
cdrom_analyze_sense_data(drive, failed);
if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
@ -285,7 +282,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
"stat 0x%x",
rq->cmd[0], rq->cmd_type, err, stat);
if (rq->cmd_type == REQ_TYPE_ATA_SENSE) {
if (ata_sense_request(rq)) {
/*
* We got an error trying to get sense info from the drive
* (probably while trying to recover from a former error).
@ -296,7 +293,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
}
/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
if (blk_rq_is_scsi(rq) && !rq->errors)
rq->errors = SAM_STAT_CHECK_CONDITION;
if (blk_noretry_request(rq))
@ -304,13 +301,13 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
switch (sense_key) {
case NOT_READY:
if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
if (req_op(rq) == REQ_OP_WRITE) {
if (ide_cd_breathe(drive, rq))
return 1;
} else {
cdrom_saw_media_change(drive);
if (rq->cmd_type == REQ_TYPE_FS &&
if (!blk_rq_is_passthrough(rq) &&
!(rq->rq_flags & RQF_QUIET))
printk(KERN_ERR PFX "%s: tray open\n",
drive->name);
@ -320,7 +317,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
if (rq->cmd_type != REQ_TYPE_FS)
if (blk_rq_is_passthrough(rq))
return 0;
/*
@ -338,7 +335,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
*
* cdrom_log_sense() knows this!
*/
if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
break;
/* fall-through */
case DATA_PROTECT:
@ -368,7 +365,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
do_end_request = 1;
break;
default:
if (rq->cmd_type != REQ_TYPE_FS)
if (blk_rq_is_passthrough(rq))
break;
if (err & ~ATA_ABORTED) {
/* go to the default handler for other errors */
@ -379,7 +376,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
do_end_request = 1;
}
if (rq->cmd_type != REQ_TYPE_FS) {
if (blk_rq_is_passthrough(rq)) {
rq->rq_flags |= RQF_FAILED;
do_end_request = 1;
}
@ -414,7 +411,7 @@ static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
* Some of the trailing request sense fields are optional,
* and some drives don't send them. Sigh.
*/
if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
cmd->nleft > 0 && cmd->nleft <= 5)
cmd->nleft = 0;
}
@ -425,12 +422,8 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
req_flags_t rq_flags)
{
struct cdrom_info *info = drive->driver_data;
struct request_sense local_sense;
int retries = 10;
req_flags_t flags = 0;
if (!sense)
sense = &local_sense;
bool failed;
ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
"rq_flags: 0x%x",
@ -440,12 +433,13 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
do {
struct request *rq;
int error;
bool delay = false;
rq = blk_get_request(drive->queue, write, __GFP_RECLAIM);
memcpy(rq->cmd, cmd, BLK_MAX_CDB);
rq->cmd_type = REQ_TYPE_ATA_PC;
rq->sense = sense;
rq = blk_get_request(drive->queue,
write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
ide_req(rq)->type = ATA_PRIV_PC;
rq->rq_flags |= rq_flags;
rq->timeout = timeout;
if (buffer) {
@ -460,21 +454,21 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
error = blk_execute_rq(drive->queue, info->disk, rq, 0);
if (buffer)
*bufflen = rq->resid_len;
flags = rq->rq_flags;
blk_put_request(rq);
*bufflen = scsi_req(rq)->resid_len;
if (sense)
memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
/*
* FIXME: we should probably abort/retry or something in case of
* failure.
*/
if (flags & RQF_FAILED) {
failed = (rq->rq_flags & RQF_FAILED) != 0;
if (failed) {
/*
* The request failed. Retry if it was due to a unit
* attention status (usually means media was changed).
*/
struct request_sense *reqbuf = sense;
struct request_sense *reqbuf = scsi_req(rq)->sense;
if (reqbuf->sense_key == UNIT_ATTENTION)
cdrom_saw_media_change(drive);
@ -485,19 +479,20 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
* a disk. Retry, but wait a little to give
* the drive time to complete the load.
*/
ssleep(2);
delay = true;
} else {
/* otherwise, don't retry */
retries = 0;
}
--retries;
}
/* end of retry loop */
} while ((flags & RQF_FAILED) && retries >= 0);
blk_put_request(rq);
if (delay)
ssleep(2);
} while (failed && retries >= 0);
/* return an error if the command failed */
return (flags & RQF_FAILED) ? -EIO : 0;
return failed ? -EIO : 0;
}
/*
@ -526,7 +521,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
ide_expiry_t *expiry = NULL;
int dma_error = 0, dma, thislen, uptodate = 0;
int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
int sense = (rq->cmd_type == REQ_TYPE_ATA_SENSE);
int sense = ata_sense_request(rq);
unsigned int timeout;
u16 len;
u8 ireason, stat;
@ -569,7 +564,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
ide_read_bcount_and_ireason(drive, &len, &ireason);
thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
if (thislen > len)
thislen = len;
@ -578,7 +573,8 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
/* If DRQ is clear, the command has completed. */
if ((stat & ATA_DRQ) == 0) {
if (rq->cmd_type == REQ_TYPE_FS) {
switch (req_op(rq)) {
default:
/*
* If we're not done reading/writing, complain.
* Otherwise, complete the command normally.
@ -592,7 +588,9 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
rq->rq_flags |= RQF_FAILED;
uptodate = 0;
}
} else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
goto out_end;
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
ide_cd_request_sense_fixup(drive, cmd);
uptodate = cmd->nleft ? 0 : 1;
@ -608,8 +606,11 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
if (!uptodate)
rq->rq_flags |= RQF_FAILED;
goto out_end;
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
goto out_end;
}
goto out_end;
}
rc = ide_check_ireason(drive, rq, len, ireason, write);
@ -636,12 +637,12 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
len -= blen;
if (sense && write == 0)
rq->sense_len += blen;
scsi_req(rq)->sense_len += blen;
}
/* pad, if necessary */
if (len > 0) {
if (rq->cmd_type != REQ_TYPE_FS || write == 0)
if (blk_rq_is_passthrough(rq) || write == 0)
ide_pad_transfer(drive, write, len);
else {
printk(KERN_ERR PFX "%s: confused, missing data\n",
@ -650,12 +651,18 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
}
}
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
switch (req_op(rq)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
timeout = rq->timeout;
} else {
break;
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
expiry = ide_cd_expiry;
/*FALLTHRU*/
default:
timeout = ATAPI_WAIT_PC;
if (rq->cmd_type != REQ_TYPE_FS)
expiry = ide_cd_expiry;
break;
}
hwif->expiry = expiry;
@ -663,15 +670,15 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
return ide_started;
out_end:
if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
rq->resid_len = 0;
if (blk_rq_is_scsi(rq) && rc == 0) {
scsi_req(rq)->resid_len = 0;
blk_end_request_all(rq, 0);
hwif->rq = NULL;
} else {
if (sense && uptodate)
ide_cd_complete_failed_rq(drive, rq);
if (rq->cmd_type == REQ_TYPE_FS) {
if (!blk_rq_is_passthrough(rq)) {
if (cmd->nleft == 0)
uptodate = 1;
} else {
@ -684,10 +691,10 @@ out_end:
return ide_stopped;
/* make sure it's fully ended */
if (rq->cmd_type != REQ_TYPE_FS) {
rq->resid_len -= cmd->nbytes - cmd->nleft;
if (blk_rq_is_passthrough(rq)) {
scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
rq->resid_len += cmd->last_xfer_len;
scsi_req(rq)->resid_len += cmd->last_xfer_len;
}
ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
@ -744,7 +751,7 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
rq->cmd[0], rq->cmd_type);
if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
if (blk_rq_is_scsi(rq))
rq->rq_flags |= RQF_QUIET;
else
rq->rq_flags &= ~RQF_FAILED;
@ -786,25 +793,31 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
if (drive->debug_mask & IDE_DBG_RQ)
blk_dump_rq_flags(rq, "ide_cd_do_request");
switch (rq->cmd_type) {
case REQ_TYPE_FS:
switch (req_op(rq)) {
default:
if (cdrom_start_rw(drive, rq) == ide_stopped)
goto out_end;
break;
case REQ_TYPE_ATA_SENSE:
case REQ_TYPE_BLOCK_PC:
case REQ_TYPE_ATA_PC:
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
handle_pc:
if (!rq->timeout)
rq->timeout = ATAPI_WAIT_PC;
cdrom_do_block_pc(drive, rq);
break;
case REQ_TYPE_DRV_PRIV:
/* right now this can only be a reset... */
uptodate = 1;
goto out_end;
default:
BUG();
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
switch (ide_req(rq)->type) {
case ATA_PRIV_MISC:
/* right now this can only be a reset... */
uptodate = 1;
goto out_end;
case ATA_PRIV_SENSE:
case ATA_PRIV_PC:
goto handle_pc;
default:
BUG();
}
}
/* prepare sense request for this command */
@ -817,7 +830,7 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
cmd.rq = rq;
if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
ide_map_sg(drive, &cmd);
}
@ -1312,28 +1325,29 @@ static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
int hard_sect = queue_logical_block_size(q);
long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
struct scsi_request *req = scsi_req(rq);
memset(rq->cmd, 0, BLK_MAX_CDB);
memset(req->cmd, 0, BLK_MAX_CDB);
if (rq_data_dir(rq) == READ)
rq->cmd[0] = GPCMD_READ_10;
req->cmd[0] = GPCMD_READ_10;
else
rq->cmd[0] = GPCMD_WRITE_10;
req->cmd[0] = GPCMD_WRITE_10;
/*
* fill in lba
*/
rq->cmd[2] = (block >> 24) & 0xff;
rq->cmd[3] = (block >> 16) & 0xff;
rq->cmd[4] = (block >> 8) & 0xff;
rq->cmd[5] = block & 0xff;
req->cmd[2] = (block >> 24) & 0xff;
req->cmd[3] = (block >> 16) & 0xff;
req->cmd[4] = (block >> 8) & 0xff;
req->cmd[5] = block & 0xff;
/*
* and transfer length
*/
rq->cmd[7] = (blocks >> 8) & 0xff;
rq->cmd[8] = blocks & 0xff;
rq->cmd_len = 10;
req->cmd[7] = (blocks >> 8) & 0xff;
req->cmd[8] = blocks & 0xff;
req->cmd_len = 10;
return BLKPREP_OK;
}
@ -1343,7 +1357,7 @@ static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
*/
static int ide_cdrom_prep_pc(struct request *rq)
{
u8 *c = rq->cmd;
u8 *c = scsi_req(rq)->cmd;
/* transform 6-byte read/write commands to the 10-byte version */
if (c[0] == READ_6 || c[0] == WRITE_6) {
@ -1354,7 +1368,7 @@ static int ide_cdrom_prep_pc(struct request *rq)
c[2] = 0;
c[1] &= 0xe0;
c[0] += (READ_10 - READ_6);
rq->cmd_len = 10;
scsi_req(rq)->cmd_len = 10;
return BLKPREP_OK;
}
@ -1373,9 +1387,9 @@ static int ide_cdrom_prep_pc(struct request *rq)
static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
{
if (rq->cmd_type == REQ_TYPE_FS)
if (!blk_rq_is_passthrough(rq))
return ide_cdrom_prep_fs(q, rq);
else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
else if (blk_rq_is_scsi(rq))
return ide_cdrom_prep_pc(rq);
return 0;

5
drivers/ide/ide-cd_ioctl.c
View File

@ -303,8 +303,9 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
struct request *rq;
int ret;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
blk_put_request(rq);

6
drivers/ide/ide-cd_verbose.c
View File

@ -315,12 +315,12 @@ void ide_cd_log_error(const char *name, struct request *failed_command,
while (hi > lo) {
mid = (lo + hi) / 2;
if (packet_command_texts[mid].packet_command ==
failed_command->cmd[0]) {
scsi_req(failed_command)->cmd[0]) {
s = packet_command_texts[mid].text;
break;
}
if (packet_command_texts[mid].packet_command >
failed_command->cmd[0])
scsi_req(failed_command)->cmd[0])
hi = mid;
else
lo = mid + 1;
@ -329,7 +329,7 @@ void ide_cd_log_error(const char *name, struct request *failed_command,
printk(KERN_ERR " The failed \"%s\" packet command "
"was: \n \"", s);
for (i = 0; i < BLK_MAX_CDB; i++)
printk(KERN_CONT "%02x ", failed_command->cmd[i]);
printk(KERN_CONT "%02x ", scsi_req(failed_command)->cmd[i]);
printk(KERN_CONT "\"\n");
}

13
drivers/ide/ide-devsets.c
View File

@ -165,11 +165,12 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
if (!(setting->flags & DS_SYNC))
return setting->set(drive, arg);
rq = blk_get_request(q, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->cmd_len = 5;
rq->cmd[0] = REQ_DEVSET_EXEC;
*(int *)&rq->cmd[1] = arg;
rq = blk_get_request(q, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 5;
scsi_req(rq)->cmd[0] = REQ_DEVSET_EXEC;
*(int *)&scsi_req(rq)->cmd[1] = arg;
rq->special = setting->set;
if (blk_execute_rq(q, NULL, rq, 0))
@ -183,7 +184,7 @@ ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
{
int err, (*setfunc)(ide_drive_t *, int) = rq->special;
err = setfunc(drive, *(int *)&rq->cmd[1]);
err = setfunc(drive, *(int *)&scsi_req(rq)->cmd[1]);
if (err)
rq->errors = err;
ide_complete_rq(drive, err, blk_rq_bytes(rq));

12
drivers/ide/ide-disk.c
View File

@ -184,7 +184,7 @@ static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
ide_hwif_t *hwif = drive->hwif;
BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
BUG_ON(rq->cmd_type != REQ_TYPE_FS);
BUG_ON(blk_rq_is_passthrough(rq));
ledtrig_disk_activity();
@ -452,8 +452,9 @@ static int idedisk_prep_fn(struct request_queue *q, struct request *rq)
cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
cmd->tf_flags = IDE_TFLAG_DYN;
cmd->protocol = ATA_PROT_NODATA;
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq->cmd_flags &= ~REQ_OP_MASK;
rq->cmd_flags |= REQ_OP_DRV_OUT;
ide_req(rq)->type = ATA_PRIV_TASKFILE;
rq->special = cmd;
cmd->rq = rq;
@ -477,8 +478,9 @@ static int set_multcount(ide_drive_t *drive, int arg)
if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
return -EBUSY;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
drive->mult_req = arg;
drive->special_flags |= IDE_SFLAG_SET_MULTMODE;

8
drivers/ide/ide-eh.c
View File

@ -123,8 +123,8 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
return ide_stopped;
/* retry only "normal" I/O: */
if (rq->cmd_type != REQ_TYPE_FS) {
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
if (blk_rq_is_passthrough(rq)) {
if (ata_taskfile_request(rq)) {
struct ide_cmd *cmd = rq->special;
if (cmd)
@ -147,8 +147,8 @@ static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
{
struct request *rq = drive->hwif->rq;
if (rq && rq->cmd_type == REQ_TYPE_DRV_PRIV &&
rq->cmd[0] == REQ_DRIVE_RESET) {
if (rq && ata_misc_request(rq) &&
scsi_req(rq)->cmd[0] == REQ_DRIVE_RESET) {
if (err <= 0 && rq->errors == 0)
rq->errors = -EIO;
ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq));

37
drivers/ide/ide-floppy.c
View File

@ -72,7 +72,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
drive->failed_pc = NULL;
if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
rq->cmd_type == REQ_TYPE_BLOCK_PC)
(req_op(rq) == REQ_OP_SCSI_IN || req_op(rq) == REQ_OP_SCSI_OUT))
uptodate = 1; /* FIXME */
else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
@ -97,7 +97,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
"Aborting request!\n");
}
if (rq->cmd_type == REQ_TYPE_DRV_PRIV)
if (ata_misc_request(rq))
rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
return uptodate;
@ -203,7 +203,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
memcpy(rq->cmd, pc->c, 12);
memcpy(scsi_req(rq)->cmd, pc->c, 12);
pc->rq = rq;
if (cmd == WRITE)
@ -216,7 +216,7 @@ static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
struct ide_atapi_pc *pc, struct request *rq)
{
ide_init_pc(pc);
memcpy(pc->c, rq->cmd, sizeof(pc->c));
memcpy(pc->c, scsi_req(rq)->cmd, sizeof(pc->c));
pc->rq = rq;
if (blk_rq_bytes(rq)) {
pc->flags |= PC_FLAG_DMA_OK;
@ -246,7 +246,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
} else
printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
if (rq->cmd_type == REQ_TYPE_DRV_PRIV) {
if (ata_misc_request(rq)) {
rq->errors = 0;
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
return ide_stopped;
@ -254,8 +254,8 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
goto out_end;
}
switch (rq->cmd_type) {
case REQ_TYPE_FS:
switch (req_op(rq)) {
default:
if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
(blk_rq_sectors(rq) % floppy->bs_factor)) {
printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
@ -265,16 +265,21 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
break;
case REQ_TYPE_DRV_PRIV:
case REQ_TYPE_ATA_SENSE:
pc = (struct ide_atapi_pc *)rq->special;
break;
case REQ_TYPE_BLOCK_PC:
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
pc = &floppy->queued_pc;
idefloppy_blockpc_cmd(floppy, pc, rq);
break;
default:
BUG();
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
switch (ide_req(rq)->type) {
case ATA_PRIV_MISC:
case ATA_PRIV_SENSE:
pc = (struct ide_atapi_pc *)rq->special;
break;
default:
BUG();
}
}
ide_prep_sense(drive, rq);
@ -286,7 +291,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
cmd.rq = rq;
if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
ide_map_sg(drive, &cmd);
}
@ -296,7 +301,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
return ide_floppy_issue_pc(drive, &cmd, pc);
out_end:
drive->failed_pc = NULL;
if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
if (blk_rq_is_passthrough(rq) && rq->errors == 0)
rq->errors = -EIO;
ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
return ide_stopped;

13
drivers/ide/ide-io.c
View File

@ -102,7 +102,7 @@ void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)
drive->dev_flags |= IDE_DFLAG_PARKED;
}
if (rq && rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
if (rq && ata_taskfile_request(rq)) {
struct ide_cmd *orig_cmd = rq->special;
if (cmd->tf_flags & IDE_TFLAG_DYN)
@ -135,7 +135,7 @@ EXPORT_SYMBOL(ide_complete_rq);
void ide_kill_rq(ide_drive_t *drive, struct request *rq)
{
u8 drv_req = (rq->cmd_type == REQ_TYPE_DRV_PRIV) && rq->rq_disk;
u8 drv_req = ata_misc_request(rq) && rq->rq_disk;
u8 media = drive->media;
drive->failed_pc = NULL;
@ -145,7 +145,7 @@ void ide_kill_rq(ide_drive_t *drive, struct request *rq)
} else {
if (media == ide_tape)
rq->errors = IDE_DRV_ERROR_GENERAL;
else if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
else if (blk_rq_is_passthrough(rq) && rq->errors == 0)
rq->errors = -EIO;
}
@ -279,7 +279,7 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq)
{
u8 cmd = rq->cmd[0];
u8 cmd = scsi_req(rq)->cmd[0];
switch (cmd) {
case REQ_PARK_HEADS:
@ -340,7 +340,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
if (drive->current_speed == 0xff)
ide_config_drive_speed(drive, drive->desired_speed);
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
if (ata_taskfile_request(rq))
return execute_drive_cmd(drive, rq);
else if (ata_pm_request(rq)) {
struct ide_pm_state *pm = rq->special;
@ -353,7 +353,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
pm->pm_step == IDE_PM_COMPLETED)
ide_complete_pm_rq(drive, rq);
return startstop;
} else if (!rq->rq_disk && rq->cmd_type == REQ_TYPE_DRV_PRIV)
} else if (!rq->rq_disk && ata_misc_request(rq))
/*
* TODO: Once all ULDs have been modified to
* check for specific op codes rather than
@ -545,6 +545,7 @@ repeat:
goto plug_device;
}
scsi_req(rq)->resid_len = blk_rq_bytes(rq);
hwif->rq = rq;
spin_unlock_irq(&hwif->lock);

14
drivers/ide/ide-ioctls.c
View File

@ -125,8 +125,9 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
if (NULL == (void *) arg) {
struct request *rq;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
err = blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
@ -221,10 +222,11 @@ static int generic_drive_reset(ide_drive_t *drive)
struct request *rq;
int ret = 0;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->cmd_len = 1;
rq->cmd[0] = REQ_DRIVE_RESET;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
if (blk_execute_rq(drive->queue, NULL, rq, 1))
ret = rq->errors;
blk_put_request(rq);

20
drivers/ide/ide-park.c
View File

@ -31,10 +31,11 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
}
spin_unlock_irq(&hwif->lock);
rq = blk_get_request(q, READ, __GFP_RECLAIM);
rq->cmd[0] = REQ_PARK_HEADS;
rq->cmd_len = 1;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq = blk_get_request(q, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
scsi_req(rq)->cmd[0] = REQ_PARK_HEADS;
scsi_req(rq)->cmd_len = 1;
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = &timeout;
rc = blk_execute_rq(q, NULL, rq, 1);
blk_put_request(rq);
@ -45,13 +46,14 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
* Make sure that *some* command is sent to the drive after the
* timeout has expired, so power management will be reenabled.
*/
rq = blk_get_request(q, READ, GFP_NOWAIT);
rq = blk_get_request(q, REQ_OP_DRV_IN, GFP_NOWAIT);
scsi_req_init(rq);
if (IS_ERR(rq))
goto out;
rq->cmd[0] = REQ_UNPARK_HEADS;
rq->cmd_len = 1;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
scsi_req(rq)->cmd[0] = REQ_UNPARK_HEADS;
scsi_req(rq)->cmd_len = 1;
ide_req(rq)->type = ATA_PRIV_MISC;
elv_add_request(q, rq, ELEVATOR_INSERT_FRONT);
out:
@ -64,7 +66,7 @@ ide_startstop_t ide_do_park_unpark(ide_drive_t *drive, struct request *rq)
struct ide_taskfile *tf = &cmd.tf;
memset(&cmd, 0, sizeof(cmd));
if (rq->cmd[0] == REQ_PARK_HEADS) {
if (scsi_req(rq)->cmd[0] == REQ_PARK_HEADS) {
drive->sleep = *(unsigned long *)rq->special;
drive->dev_flags |= IDE_DFLAG_SLEEPING;
tf->command = ATA_CMD_IDLEIMMEDIATE;

20
drivers/ide/ide-pm.c
View File

@ -18,8 +18,9 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
}
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_ATA_PM_SUSPEND;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_PM_SUSPEND;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
@ -88,8 +89,9 @@ int generic_ide_resume(struct device *dev)
}
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_ATA_PM_RESUME;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_PM_RESUME;
rq->rq_flags |= RQF_PREEMPT;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_RESUME;
@ -221,10 +223,10 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
#ifdef DEBUG_PM
printk("%s: completing PM request, %s\n", drive->name,
(rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND) ? "suspend" : "resume");
(ide_req(rq)->type == ATA_PRIV_PM_SUSPEND) ? "suspend" : "resume");
#endif
spin_lock_irqsave(q->queue_lock, flags);
if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND)
if (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND)
blk_stop_queue(q);
else
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
@ -240,11 +242,13 @@ void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
{
struct ide_pm_state *pm = rq->special;
if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND &&
if (blk_rq_is_private(rq) &&
ide_req(rq)->type == ATA_PRIV_PM_SUSPEND &&
pm->pm_step == IDE_PM_START_SUSPEND)
/* Mark drive blocked when starting the suspend sequence. */
drive->dev_flags |= IDE_DFLAG_BLOCKED;
else if (rq->cmd_type == REQ_TYPE_ATA_PM_RESUME &&
else if (blk_rq_is_private(rq) &&
ide_req(rq)->type == ATA_PRIV_PM_RESUME &&
pm->pm_step == IDE_PM_START_RESUME) {
/*
* The first thing we do on wakeup is to wait for BSY bit to

36
drivers/ide/ide-probe.c
View File

@ -741,6 +741,14 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
}
}
static int ide_init_rq(struct request_queue *q, struct request *rq, gfp_t gfp)
{
struct ide_request *req = blk_mq_rq_to_pdu(rq);
req->sreq.sense = req->sense;
return 0;
}
/*
* init request queue
*/
@ -758,11 +766,18 @@ static int ide_init_queue(ide_drive_t *drive)
* limits and LBA48 we could raise it but as yet
* do not.
*/
q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif));
q = blk_alloc_queue_node(GFP_KERNEL, hwif_to_node(hwif));
if (!q)
return 1;
q->request_fn = do_ide_request;
q->init_rq_fn = ide_init_rq;
q->cmd_size = sizeof(struct ide_request);
if (blk_init_allocated_queue(q) < 0) {
blk_cleanup_queue(q);
return 1;
}
q->queuedata = drive;
blk_queue_segment_boundary(q, 0xffff);
@ -1131,10 +1146,12 @@ static void ide_port_init_devices_data(ide_hwif_t *hwif)
ide_port_for_each_dev(i, drive, hwif) {
u8 j = (hwif->index * MAX_DRIVES) + i;
u16 *saved_id = drive->id;
struct request *saved_sense_rq = drive->sense_rq;
memset(drive, 0, sizeof(*drive));
memset(saved_id, 0, SECTOR_SIZE);
drive->id = saved_id;
drive->sense_rq = saved_sense_rq;
drive->media = ide_disk;
drive->select = (i << 4) | ATA_DEVICE_OBS;
@ -1241,6 +1258,7 @@ static void ide_port_free_devices(ide_hwif_t *hwif)
int i;
ide_port_for_each_dev(i, drive, hwif) {
kfree(drive->sense_rq);
kfree(drive->id);
kfree(drive);
}
@ -1248,11 +1266,10 @@ static void ide_port_free_devices(ide_hwif_t *hwif)
static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
{
ide_drive_t *drive;
int i;
for (i = 0; i < MAX_DRIVES; i++) {
ide_drive_t *drive;
drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
if (drive == NULL)
goto out_nomem;
@ -1267,12 +1284,21 @@ static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
*/
drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
if (drive->id == NULL)
goto out_nomem;
goto out_free_drive;
drive->sense_rq = kmalloc(sizeof(struct request) +
sizeof(struct ide_request), GFP_KERNEL);
if (!drive->sense_rq)
goto out_free_id;
hwif->devices[i] = drive;
}
return 0;
out_free_id:
kfree(drive->id);
out_free_drive:
kfree(drive);
out_nomem:
ide_port_free_devices(hwif);
return -ENOMEM;

41
drivers/ide/ide-tape.c
View File

@ -282,7 +282,7 @@ static void idetape_analyze_error(ide_drive_t *drive)
/* correct remaining bytes to transfer */
if (pc->flags & PC_FLAG_DMA_ERROR)
rq->resid_len = tape->blk_size * get_unaligned_be32(&sense[3]);
scsi_req(rq)->resid_len = tape->blk_size * get_unaligned_be32(&sense[3]);
/*
* If error was the result of a zero-length read or write command,
@ -316,7 +316,7 @@ static void idetape_analyze_error(ide_drive_t *drive)
pc->flags |= PC_FLAG_ABORT;
}
if (!(pc->flags & PC_FLAG_ABORT) &&
(blk_rq_bytes(rq) - rq->resid_len))
(blk_rq_bytes(rq) - scsi_req(rq)->resid_len))
pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
}
}
@ -348,7 +348,7 @@ static int ide_tape_callback(ide_drive_t *drive, int dsc)
"itself - Aborting request!\n");
} else if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
unsigned int blocks =
(blk_rq_bytes(rq) - rq->resid_len) / tape->blk_size;
(blk_rq_bytes(rq) - scsi_req(rq)->resid_len) / tape->blk_size;
tape->avg_size += blocks * tape->blk_size;
@ -560,7 +560,7 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
pc->flags |= PC_FLAG_WRITING;
}
memcpy(rq->cmd, pc->c, 12);
memcpy(scsi_req(rq)->cmd, pc->c, 12);
}
static ide_startstop_t idetape_do_request(ide_drive_t *drive,
@ -570,14 +570,16 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc *pc = NULL;
struct ide_cmd cmd;
struct scsi_request *req = scsi_req(rq);
u8 stat;
ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, sector: %llu, nr_sectors: %u",
rq->cmd[0], (unsigned long long)blk_rq_pos(rq),
req->cmd[0], (unsigned long long)blk_rq_pos(rq),
blk_rq_sectors(rq));
BUG_ON(!(rq->cmd_type == REQ_TYPE_DRV_PRIV ||
rq->cmd_type == REQ_TYPE_ATA_SENSE));
BUG_ON(!blk_rq_is_private(rq));
BUG_ON(ide_req(rq)->type != ATA_PRIV_MISC &&
ide_req(rq)->type != ATA_PRIV_SENSE);
/* Retry a failed packet command */
if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
@ -592,7 +594,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
stat = hwif->tp_ops->read_status(hwif);
if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 &&
(rq->cmd[13] & REQ_IDETAPE_PC2) == 0)
(req->cmd[13] & REQ_IDETAPE_PC2) == 0)
drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
if (drive->dev_flags & IDE_DFLAG_POST_RESET) {
@ -609,7 +611,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
} else if (time_after(jiffies, tape->dsc_timeout)) {
printk(KERN_ERR "ide-tape: %s: DSC timeout\n",
tape->name);
if (rq->cmd[13] & REQ_IDETAPE_PC2) {
if (req->cmd[13] & REQ_IDETAPE_PC2) {
idetape_media_access_finished(drive);
return ide_stopped;
} else {
@ -626,23 +628,23 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
tape->postponed_rq = false;
}
if (rq->cmd[13] & REQ_IDETAPE_READ) {
if (req->cmd[13] & REQ_IDETAPE_READ) {
pc = &tape->queued_pc;
ide_tape_create_rw_cmd(tape, pc, rq, READ_6);
goto out;
}
if (rq->cmd[13] & REQ_IDETAPE_WRITE) {
if (req->cmd[13] & REQ_IDETAPE_WRITE) {
pc = &tape->queued_pc;
ide_tape_create_rw_cmd(tape, pc, rq, WRITE_6);
goto out;
}
if (rq->cmd[13] & REQ_IDETAPE_PC1) {
if (req->cmd[13] & REQ_IDETAPE_PC1) {
pc = (struct ide_atapi_pc *)rq->special;
rq->cmd[13] &= ~(REQ_IDETAPE_PC1);
rq->cmd[13] |= REQ_IDETAPE_PC2;
req->cmd[13] &= ~(REQ_IDETAPE_PC1);
req->cmd[13] |= REQ_IDETAPE_PC2;
goto out;
}
if (rq->cmd[13] & REQ_IDETAPE_PC2) {
if (req->cmd[13] & REQ_IDETAPE_PC2) {
idetape_media_access_finished(drive);
return ide_stopped;
}
@ -852,9 +854,10 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
BUG_ON(cmd != REQ_IDETAPE_READ && cmd != REQ_IDETAPE_WRITE);
BUG_ON(size < 0 || size % tape->blk_size);
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->cmd[13] = cmd;
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd[13] = cmd;
rq->rq_disk = tape->disk;
rq->__sector = tape->first_frame;
@ -868,7 +871,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
blk_execute_rq(drive->queue, tape->disk, rq, 0);
/* calculate the number of transferred bytes and update buffer state */
size -= rq->resid_len;
size -= scsi_req(rq)->resid_len;
tape->cur = tape->buf;
if (cmd == REQ_IDETAPE_READ)
tape->valid = size;

8
drivers/ide/ide-taskfile.c
View File

@ -428,10 +428,12 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
{
struct request *rq;
int error;
int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;
rq = blk_get_request(drive->queue, rw, __GFP_RECLAIM);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq = blk_get_request(drive->queue,
(cmd->tf_flags & IDE_TFLAG_WRITE) ?
REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
/*
* (ks) We transfer currently only whole sectors.

2
drivers/ide/sis5513.c
View File

@ -54,7 +54,7 @@
#define DRV_NAME "sis5513"
/* registers layout and init values are chipset family dependent */
#undef ATA_16
#define ATA_16 0x01
#define ATA_33 0x02
#define ATA_66 0x03

10
drivers/md/bcache/request.c
View File

@ -1009,7 +1009,7 @@ static int cached_dev_congested(void *data, int bits)
struct request_queue *q = bdev_get_queue(dc->bdev);
int ret = 0;
if (bdi_congested(&q->backing_dev_info, bits))
if (bdi_congested(q->backing_dev_info, bits))
return 1;
if (cached_dev_get(dc)) {
@ -1018,7 +1018,7 @@ static int cached_dev_congested(void *data, int bits)
for_each_cache(ca, d->c, i) {
q = bdev_get_queue(ca->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
}
cached_dev_put(dc);
@ -1032,7 +1032,7 @@ void bch_cached_dev_request_init(struct cached_dev *dc)
struct gendisk *g = dc->disk.disk;
g->queue->make_request_fn = cached_dev_make_request;
g->queue->backing_dev_info.congested_fn = cached_dev_congested;
g->queue->backing_dev_info->congested_fn = cached_dev_congested;
dc->disk.cache_miss = cached_dev_cache_miss;
dc->disk.ioctl = cached_dev_ioctl;
}
@ -1125,7 +1125,7 @@ static int flash_dev_congested(void *data, int bits)
for_each_cache(ca, d->c, i) {
q = bdev_get_queue(ca->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
}
return ret;
@ -1136,7 +1136,7 @@ void bch_flash_dev_request_init(struct bcache_device *d)
struct gendisk *g = d->disk;
g->queue->make_request_fn = flash_dev_make_request;
g->queue->backing_dev_info.congested_fn = flash_dev_congested;
g->queue->backing_dev_info->congested_fn = flash_dev_congested;
d->cache_miss = flash_dev_cache_miss;
d->ioctl = flash_dev_ioctl;
}

8
drivers/md/bcache/super.c
View File

@ -807,7 +807,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size,
blk_queue_make_request(q, NULL);
d->disk->queue = q;
q->queuedata = d;
q->backing_dev_info.congested_data = d;
q->backing_dev_info->congested_data = d;
q->limits.max_hw_sectors = UINT_MAX;
q->limits.max_sectors = UINT_MAX;
q->limits.max_segment_size = UINT_MAX;
@ -1132,9 +1132,9 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size)
set_capacity(dc->disk.disk,
dc->bdev->bd_part->nr_sects - dc->sb.data_offset);
dc->disk.disk->queue->backing_dev_info.ra_pages =
max(dc->disk.disk->queue->backing_dev_info.ra_pages,
q->backing_dev_info.ra_pages);
dc->disk.disk->queue->backing_dev_info->ra_pages =
max(dc->disk.disk->queue->backing_dev_info->ra_pages,
q->backing_dev_info->ra_pages);
bch_cached_dev_request_init(dc);
bch_cached_dev_writeback_init(dc);

2
drivers/md/dm-cache-target.c
View File

@ -2284,7 +2284,7 @@ static void do_waker(struct work_struct *ws)
static int is_congested(struct dm_dev *dev, int bdi_bits)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
return bdi_congested(&q->backing_dev_info, bdi_bits);
return bdi_congested(q->backing_dev_info, bdi_bits);
}
static int cache_is_congested(struct dm_target_callbacks *cb, int bdi_bits)

1
drivers/md/dm-core.h
View File

@ -92,7 +92,6 @@ struct mapped_device {
* io objects are allocated from here.
*/
mempool_t *io_pool;
mempool_t *rq_pool;
struct bio_set *bs;

2
drivers/md/dm-era-target.c
View File

@ -1379,7 +1379,7 @@ static void stop_worker(struct era *era)
static int dev_is_congested(struct dm_dev *dev, int bdi_bits)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
return bdi_congested(&q->backing_dev_info, bdi_bits);
return bdi_congested(q->backing_dev_info, bdi_bits);
}
static int era_is_congested(struct dm_target_callbacks *cb, int bdi_bits)

132
drivers/md/dm-mpath.c
View File

@ -92,12 +92,6 @@ struct multipath {
unsigned queue_mode;
/*
* We must use a mempool of dm_mpath_io structs so that we
* can resubmit bios on error.
*/
mempool_t *mpio_pool;
struct mutex work_mutex;
struct work_struct trigger_event;
@ -115,8 +109,6 @@ struct dm_mpath_io {
typedef int (*action_fn) (struct pgpath *pgpath);
static struct kmem_cache *_mpio_cache;
static struct workqueue_struct *kmultipathd, *kmpath_handlerd;
static void trigger_event(struct work_struct *work);
static void activate_path(struct work_struct *work);
@ -209,7 +201,6 @@ static struct multipath *alloc_multipath(struct dm_target *ti)
init_waitqueue_head(&m->pg_init_wait);
mutex_init(&m->work_mutex);
m->mpio_pool = NULL;
m->queue_mode = DM_TYPE_NONE;
m->ti = ti;
@ -229,16 +220,7 @@ static int alloc_multipath_stage2(struct dm_target *ti, struct multipath *m)
m->queue_mode = DM_TYPE_MQ_REQUEST_BASED;
else
m->queue_mode = DM_TYPE_REQUEST_BASED;
}
if (m->queue_mode == DM_TYPE_REQUEST_BASED) {
unsigned min_ios = dm_get_reserved_rq_based_ios();
m->mpio_pool = mempool_create_slab_pool(min_ios, _mpio_cache);
if (!m->mpio_pool)
return -ENOMEM;
}
else if (m->queue_mode == DM_TYPE_BIO_BASED) {
} else if (m->queue_mode == DM_TYPE_BIO_BASED) {
INIT_WORK(&m->process_queued_bios, process_queued_bios);
/*
* bio-based doesn't support any direct scsi_dh management;
@ -263,7 +245,6 @@ static void free_multipath(struct multipath *m)
kfree(m->hw_handler_name);
kfree(m->hw_handler_params);
mempool_destroy(m->mpio_pool);
kfree(m);
}
@ -272,38 +253,6 @@ static struct dm_mpath_io *get_mpio(union map_info *info)
return info->ptr;
}
static struct dm_mpath_io *set_mpio(struct multipath *m, union map_info *info)
{
struct dm_mpath_io *mpio;
if (!m->mpio_pool) {
/* Use blk-mq pdu memory requested via per_io_data_size */
mpio = get_mpio(info);
memset(mpio, 0, sizeof(*mpio));
return mpio;
}
mpio = mempool_alloc(m->mpio_pool, GFP_ATOMIC);
if (!mpio)
return NULL;
memset(mpio, 0, sizeof(*mpio));
info->ptr = mpio;
return mpio;
}
static void clear_request_fn_mpio(struct multipath *m, union map_info *info)
{
/* Only needed for non blk-mq (.request_fn) multipath */
if (m->mpio_pool) {
struct dm_mpath_io *mpio = info->ptr;
info->ptr = NULL;
mempool_free(mpio, m->mpio_pool);
}
}
static size_t multipath_per_bio_data_size(void)
{
return sizeof(struct dm_mpath_io) + sizeof(struct dm_bio_details);
@ -530,16 +479,17 @@ static bool must_push_back_bio(struct multipath *m)
/*
* Map cloned requests (request-based multipath)
*/
static int __multipath_map(struct dm_target *ti, struct request *clone,
union map_info *map_context,
struct request *rq, struct request **__clone)
static int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
union map_info *map_context,
struct request **__clone)
{
struct multipath *m = ti->private;
int r = DM_MAPIO_REQUEUE;
size_t nr_bytes = clone ? blk_rq_bytes(clone) : blk_rq_bytes(rq);
size_t nr_bytes = blk_rq_bytes(rq);
struct pgpath *pgpath;
struct block_device *bdev;
struct dm_mpath_io *mpio;
struct dm_mpath_io *mpio = get_mpio(map_context);
struct request *clone;
/* Do we need to select a new pgpath? */
pgpath = lockless_dereference(m->current_pgpath);
@ -556,42 +506,23 @@ static int __multipath_map(struct dm_target *ti, struct request *clone,
return r;
}
mpio = set_mpio(m, map_context);
if (!mpio)
/* ENOMEM, requeue */
return r;
memset(mpio, 0, sizeof(*mpio));
mpio->pgpath = pgpath;
mpio->nr_bytes = nr_bytes;
bdev = pgpath->path.dev->bdev;
if (clone) {
/*
* Old request-based interface: allocated clone is passed in.
* Used by: .request_fn stacked on .request_fn path(s).
*/
clone->q = bdev_get_queue(bdev);
clone->rq_disk = bdev->bd_disk;
clone->cmd_flags |= REQ_FAILFAST_TRANSPORT;
} else {
/*
* blk-mq request-based interface; used by both:
* .request_fn stacked on blk-mq path(s) and
* blk-mq stacked on blk-mq path(s).
*/
clone = blk_mq_alloc_request(bdev_get_queue(bdev),
rq_data_dir(rq), BLK_MQ_REQ_NOWAIT);
if (IS_ERR(clone)) {
/* EBUSY, ENODEV or EWOULDBLOCK: requeue */
clear_request_fn_mpio(m, map_context);
return r;
}
clone->bio = clone->biotail = NULL;
clone->rq_disk = bdev->bd_disk;
clone->cmd_flags |= REQ_FAILFAST_TRANSPORT;
*__clone = clone;
clone = blk_get_request(bdev_get_queue(bdev),
rq->cmd_flags | REQ_NOMERGE,
GFP_ATOMIC);
if (IS_ERR(clone)) {
/* EBUSY, ENODEV or EWOULDBLOCK: requeue */
return r;
}
clone->bio = clone->biotail = NULL;
clone->rq_disk = bdev->bd_disk;
clone->cmd_flags |= REQ_FAILFAST_TRANSPORT;
*__clone = clone;
if (pgpath->pg->ps.type->start_io)
pgpath->pg->ps.type->start_io(&pgpath->pg->ps,
@ -600,22 +531,9 @@ static int __multipath_map(struct dm_target *ti, struct request *clone,
return DM_MAPIO_REMAPPED;
}
static int multipath_map(struct dm_target *ti, struct request *clone,
union map_info *map_context)
{
return __multipath_map(ti, clone, map_context, NULL, NULL);
}
static int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
union map_info *map_context,
struct request **clone)
{
return __multipath_map(ti, NULL, map_context, rq, clone);
}
static void multipath_release_clone(struct request *clone)
{
blk_mq_free_request(clone);
blk_put_request(clone);
}
/*
@ -1187,7 +1105,7 @@ static int multipath_ctr(struct dm_target *ti, unsigned argc, char **argv)
ti->num_write_same_bios = 1;
if (m->queue_mode == DM_TYPE_BIO_BASED)
ti->per_io_data_size = multipath_per_bio_data_size();
else if (m->queue_mode == DM_TYPE_MQ_REQUEST_BASED)
else
ti->per_io_data_size = sizeof(struct dm_mpath_io);
return 0;
@ -1610,7 +1528,6 @@ static int multipath_end_io(struct dm_target *ti, struct request *clone,
if (ps->type->end_io)
ps->type->end_io(ps, &pgpath->path, mpio->nr_bytes);
}
clear_request_fn_mpio(m, map_context);
return r;
}
@ -2060,7 +1977,6 @@ static struct target_type multipath_target = {
.module = THIS_MODULE,
.ctr = multipath_ctr,
.dtr = multipath_dtr,
.map_rq = multipath_map,
.clone_and_map_rq = multipath_clone_and_map,
.release_clone_rq = multipath_release_clone,
.rq_end_io = multipath_end_io,
@ -2080,11 +1996,6 @@ static int __init dm_multipath_init(void)
{
int r;
/* allocate a slab for the dm_mpath_ios */
_mpio_cache = KMEM_CACHE(dm_mpath_io, 0);
if (!_mpio_cache)
return -ENOMEM;
r = dm_register_target(&multipath_target);
if (r < 0) {
DMERR("request-based register failed %d", r);
@ -2120,8 +2031,6 @@ bad_alloc_kmpath_handlerd:
bad_alloc_kmultipathd:
dm_unregister_target(&multipath_target);
bad_register_target:
kmem_cache_destroy(_mpio_cache);
return r;
}
@ -2131,7 +2040,6 @@ static void __exit dm_multipath_exit(void)
destroy_workqueue(kmultipathd);
dm_unregister_target(&multipath_target);
kmem_cache_destroy(_mpio_cache);
}
module_init(dm_multipath_init);

268
drivers/md/dm-rq.c
View File

@ -109,28 +109,6 @@ void dm_stop_queue(struct request_queue *q)
dm_mq_stop_queue(q);
}
static struct dm_rq_target_io *alloc_old_rq_tio(struct mapped_device *md,
gfp_t gfp_mask)
{
return mempool_alloc(md->io_pool, gfp_mask);
}
static void free_old_rq_tio(struct dm_rq_target_io *tio)
{
mempool_free(tio, tio->md->io_pool);
}
static struct request *alloc_old_clone_request(struct mapped_device *md,
gfp_t gfp_mask)
{
return mempool_alloc(md->rq_pool, gfp_mask);
}
static void free_old_clone_request(struct mapped_device *md, struct request *rq)
{
mempool_free(rq, md->rq_pool);
}
/*
* Partial completion handling for request-based dm
*/
@ -185,7 +163,7 @@ static void end_clone_bio(struct bio *clone)
static struct dm_rq_target_io *tio_from_request(struct request *rq)
{
return (rq->q->mq_ops ? blk_mq_rq_to_pdu(rq) : rq->special);
return blk_mq_rq_to_pdu(rq);
}
static void rq_end_stats(struct mapped_device *md, struct request *orig)
@ -233,31 +211,6 @@ static void rq_completed(struct mapped_device *md, int rw, bool run_queue)
dm_put(md);
}
static void free_rq_clone(struct request *clone)
{
struct dm_rq_target_io *tio = clone->end_io_data;
struct mapped_device *md = tio->md;
blk_rq_unprep_clone(clone);
/*
* It is possible for a clone_old_rq() allocated clone to
* get passed in -- it may not yet have a request_queue.
* This is known to occur if the error target replaces
* a multipath target that has a request_fn queue stacked
* on blk-mq queue(s).
*/
if (clone->q && clone->q->mq_ops)
/* stacked on blk-mq queue(s) */
tio->ti->type->release_clone_rq(clone);
else if (!md->queue->mq_ops)
/* request_fn queue stacked on request_fn queue(s) */
free_old_clone_request(md, clone);
if (!md->queue->mq_ops)
free_old_rq_tio(tio);
}
/*
* Complete the clone and the original request.
* Must be called without clone's queue lock held,
@ -270,20 +223,9 @@ static void dm_end_request(struct request *clone, int error)
struct mapped_device *md = tio->md;
struct request *rq = tio->orig;
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
rq->errors = clone->errors;
rq->resid_len = clone->resid_len;
blk_rq_unprep_clone(clone);
tio->ti->type->release_clone_rq(clone);
if (rq->sense)
/*
* We are using the sense buffer of the original
* request.
* So setting the length of the sense data is enough.
*/
rq->sense_len = clone->sense_len;
}
free_rq_clone(clone);
rq_end_stats(md, rq);
if (!rq->q->mq_ops)
blk_end_request_all(rq, error);
@ -292,22 +234,6 @@ static void dm_end_request(struct request *clone, int error)
rq_completed(md, rw, true);
}
static void dm_unprep_request(struct request *rq)
{
struct dm_rq_target_io *tio = tio_from_request(rq);
struct request *clone = tio->clone;
if (!rq->q->mq_ops) {
rq->special = NULL;
rq->rq_flags &= ~RQF_DONTPREP;
}
if (clone)
free_rq_clone(clone);
else if (!tio->md->queue->mq_ops)
free_old_rq_tio(tio);
}
/*
* Requeue the original request of a clone.
*/
@ -346,7 +272,10 @@ static void dm_requeue_original_request(struct dm_rq_target_io *tio, bool delay_
int rw = rq_data_dir(rq);
rq_end_stats(md, rq);
dm_unprep_request(rq);
if (tio->clone) {
blk_rq_unprep_clone(tio->clone);
tio->ti->type->release_clone_rq(tio->clone);
}
if (!rq->q->mq_ops)
dm_old_requeue_request(rq);
@ -401,14 +330,11 @@ static void dm_softirq_done(struct request *rq)
if (!clone) {
rq_end_stats(tio->md, rq);
rw = rq_data_dir(rq);
if (!rq->q->mq_ops) {
if (!rq->q->mq_ops)
blk_end_request_all(rq, tio->error);
rq_completed(tio->md, rw, false);
free_old_rq_tio(tio);
} else {
else
blk_mq_end_request(rq, tio->error);
rq_completed(tio->md, rw, false);
}
rq_completed(tio->md, rw, false);
return;
}
@ -452,16 +378,6 @@ static void end_clone_request(struct request *clone, int error)
{
struct dm_rq_target_io *tio = clone->end_io_data;
if (!clone->q->mq_ops) {
/*
* For just cleaning up the information of the queue in which
* the clone was dispatched.
* The clone is *NOT* freed actually here because it is alloced
* from dm own mempool (RQF_ALLOCED isn't set).
*/
__blk_put_request(clone->q, clone);
}
/*
* Actual request completion is done in a softirq context which doesn't
* hold the clone's queue lock. Otherwise, deadlock could occur because:
@ -511,9 +427,6 @@ static int setup_clone(struct request *clone, struct request *rq,
if (r)
return r;
clone->cmd = rq->cmd;
clone->cmd_len = rq->cmd_len;
clone->sense = rq->sense;
clone->end_io = end_clone_request;
clone->end_io_data = tio;
@ -522,28 +435,6 @@ static int setup_clone(struct request *clone, struct request *rq,
return 0;
}
static struct request *clone_old_rq(struct request *rq, struct mapped_device *md,
struct dm_rq_target_io *tio, gfp_t gfp_mask)
{
/*
* Create clone for use with .request_fn request_queue
*/
struct request *clone;
clone = alloc_old_clone_request(md, gfp_mask);
if (!clone)
return NULL;
blk_rq_init(NULL, clone);
if (setup_clone(clone, rq, tio, gfp_mask)) {
/* -ENOMEM */
free_old_clone_request(md, clone);
return NULL;
}
return clone;
}
static void map_tio_request(struct kthread_work *work);
static void init_tio(struct dm_rq_target_io *tio, struct request *rq,
@ -565,60 +456,6 @@ static void init_tio(struct dm_rq_target_io *tio, struct request *rq,
kthread_init_work(&tio->work, map_tio_request);
}
static struct dm_rq_target_io *dm_old_prep_tio(struct request *rq,
struct mapped_device *md,
gfp_t gfp_mask)
{
struct dm_rq_target_io *tio;
int srcu_idx;
struct dm_table *table;
tio = alloc_old_rq_tio(md, gfp_mask);
if (!tio)
return NULL;
init_tio(tio, rq, md);
table = dm_get_live_table(md, &srcu_idx);
/*
* Must clone a request if this .request_fn DM device
* is stacked on .request_fn device(s).
*/
if (!dm_table_all_blk_mq_devices(table)) {
if (!clone_old_rq(rq, md, tio, gfp_mask)) {
dm_put_live_table(md, srcu_idx);
free_old_rq_tio(tio);
return NULL;
}
}
dm_put_live_table(md, srcu_idx);
return tio;
}
/*
* Called with the queue lock held.
*/
static int dm_old_prep_fn(struct request_queue *q, struct request *rq)
{
struct mapped_device *md = q->queuedata;
struct dm_rq_target_io *tio;
if (unlikely(rq->special)) {
DMWARN("Already has something in rq->special.");
return BLKPREP_KILL;
}
tio = dm_old_prep_tio(rq, md, GFP_ATOMIC);
if (!tio)
return BLKPREP_DEFER;
rq->special = tio;
rq->rq_flags |= RQF_DONTPREP;
return BLKPREP_OK;
}
/*
* Returns:
* DM_MAPIO_* : the request has been processed as indicated
@ -633,31 +470,18 @@ static int map_request(struct dm_rq_target_io *tio)
struct request *rq = tio->orig;
struct request *clone = NULL;
if (tio->clone) {
clone = tio->clone;
r = ti->type->map_rq(ti, clone, &tio->info);
if (r == DM_MAPIO_DELAY_REQUEUE)
return DM_MAPIO_REQUEUE; /* .request_fn requeue is always immediate */
} else {
r = ti->type->clone_and_map_rq(ti, rq, &tio->info, &clone);
if (r < 0) {
/* The target wants to complete the I/O */
dm_kill_unmapped_request(rq, r);
return r;
}
if (r == DM_MAPIO_REMAPPED &&
setup_clone(clone, rq, tio, GFP_ATOMIC)) {
/* -ENOMEM */
ti->type->release_clone_rq(clone);
return DM_MAPIO_REQUEUE;
}
}
r = ti->type->clone_and_map_rq(ti, rq, &tio->info, &clone);
switch (r) {
case DM_MAPIO_SUBMITTED:
/* The target has taken the I/O to submit by itself later */
break;
case DM_MAPIO_REMAPPED:
if (setup_clone(clone, rq, tio, GFP_ATOMIC)) {
/* -ENOMEM */
ti->type->release_clone_rq(clone);
return DM_MAPIO_REQUEUE;
}
/* The target has remapped the I/O so dispatch it */
trace_block_rq_remap(clone->q, clone, disk_devt(dm_disk(md)),
blk_rq_pos(rq));
@ -716,6 +540,29 @@ static void dm_start_request(struct mapped_device *md, struct request *orig)
dm_get(md);
}
static int __dm_rq_init_rq(struct mapped_device *md, struct request *rq)
{
struct dm_rq_target_io *tio = blk_mq_rq_to_pdu(rq);
/*
* Must initialize md member of tio, otherwise it won't
* be available in dm_mq_queue_rq.
*/
tio->md = md;
if (md->init_tio_pdu) {
/* target-specific per-io data is immediately after the tio */
tio->info.ptr = tio + 1;
}
return 0;
}
static int dm_rq_init_rq(struct request_queue *q, struct request *rq, gfp_t gfp)
{
return __dm_rq_init_rq(q->rq_alloc_data, rq);
}
static void map_tio_request(struct kthread_work *work)
{
struct dm_rq_target_io *tio = container_of(work, struct dm_rq_target_io, work);
@ -814,6 +661,7 @@ static void dm_old_request_fn(struct request_queue *q)
dm_start_request(md, rq);
tio = tio_from_request(rq);
init_tio(tio, rq, md);
/* Establish tio->ti before queuing work (map_tio_request) */
tio->ti = ti;
kthread_queue_work(&md->kworker, &tio->work);
@ -824,10 +672,23 @@ static void dm_old_request_fn(struct request_queue *q)
/*
* Fully initialize a .request_fn request-based queue.
*/
int dm_old_init_request_queue(struct mapped_device *md)
int dm_old_init_request_queue(struct mapped_device *md, struct dm_table *t)
{
struct dm_target *immutable_tgt;
/* Fully initialize the queue */
if (!blk_init_allocated_queue(md->queue, dm_old_request_fn, NULL))
md->queue->cmd_size = sizeof(struct dm_rq_target_io);
md->queue->rq_alloc_data = md;
md->queue->request_fn = dm_old_request_fn;
md->queue->init_rq_fn = dm_rq_init_rq;
immutable_tgt = dm_table_get_immutable_target(t);
if (immutable_tgt && immutable_tgt->per_io_data_size) {
/* any target-specific per-io data is immediately after the tio */
md->queue->cmd_size += immutable_tgt->per_io_data_size;
md->init_tio_pdu = true;
}
if (blk_init_allocated_queue(md->queue) < 0)
return -EINVAL;
/* disable dm_old_request_fn's merge heuristic by default */
@ -835,7 +696,6 @@ int dm_old_init_request_queue(struct mapped_device *md)
dm_init_normal_md_queue(md);
blk_queue_softirq_done(md->queue, dm_softirq_done);
blk_queue_prep_rq(md->queue, dm_old_prep_fn);
/* Initialize the request-based DM worker thread */
kthread_init_worker(&md->kworker);
@ -856,21 +716,7 @@ static int dm_mq_init_request(void *data, struct request *rq,
unsigned int hctx_idx, unsigned int request_idx,
unsigned int numa_node)
{
struct mapped_device *md = data;
struct dm_rq_target_io *tio = blk_mq_rq_to_pdu(rq);
/*
* Must initialize md member of tio, otherwise it won't
* be available in dm_mq_queue_rq.
*/
tio->md = md;
if (md->init_tio_pdu) {
/* target-specific per-io data is immediately after the tio */
tio->info.ptr = tio + 1;
}
return 0;
return __dm_rq_init_rq(data, rq);
}
static int dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,

2
drivers/md/dm-rq.h
View File

@ -48,7 +48,7 @@ struct dm_rq_clone_bio_info {
bool dm_use_blk_mq_default(void);
bool dm_use_blk_mq(struct mapped_device *md);
int dm_old_init_request_queue(struct mapped_device *md);
int dm_old_init_request_queue(struct mapped_device *md, struct dm_table *t);
int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t);
void dm_mq_cleanup_mapped_device(struct mapped_device *md);

2
drivers/md/dm-table.c
View File

@ -1750,7 +1750,7 @@ int dm_table_any_congested(struct dm_table *t, int bdi_bits)
char b[BDEVNAME_SIZE];
if (likely(q))
r |= bdi_congested(&q->backing_dev_info, bdi_bits);
r |= bdi_congested(q->backing_dev_info, bdi_bits);
else
DMWARN_LIMIT("%s: any_congested: nonexistent device %s",
dm_device_name(t->md),

7
drivers/md/dm-target.c
View File

@ -131,12 +131,6 @@ static int io_err_map(struct dm_target *tt, struct bio *bio)
return -EIO;
}
static int io_err_map_rq(struct dm_target *ti, struct request *clone,
union map_info *map_context)
{
return -EIO;
}
static int io_err_clone_and_map_rq(struct dm_target *ti, struct request *rq,
union map_info *map_context,
struct request **clone)
@ -161,7 +155,6 @@ static struct target_type error_target = {
.ctr = io_err_ctr,
.dtr = io_err_dtr,
.map = io_err_map,
.map_rq = io_err_map_rq,
.clone_and_map_rq = io_err_clone_and_map_rq,
.release_clone_rq = io_err_release_clone_rq,
.direct_access = io_err_direct_access,

2
drivers/md/dm-thin.c
View File

@ -2711,7 +2711,7 @@ static int pool_is_congested(struct dm_target_callbacks *cb, int bdi_bits)
return 1;
q = bdev_get_queue(pt->data_dev->bdev);
return bdi_congested(&q->backing_dev_info, bdi_bits);
return bdi_congested(q->backing_dev_info, bdi_bits);
}
static void requeue_bios(struct pool *pool)

49
drivers/md/dm.c
View File

@ -91,7 +91,6 @@ static int dm_numa_node = DM_NUMA_NODE;
*/
struct dm_md_mempools {
mempool_t *io_pool;
mempool_t *rq_pool;
struct bio_set *bs;
};
@ -466,13 +465,16 @@ static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
if (r > 0) {
/*
* Target determined this ioctl is being issued against
* a logical partition of the parent bdev; so extra
* validation is needed.
* Target determined this ioctl is being issued against a
* subset of the parent bdev; require extra privileges.
*/
r = scsi_verify_blk_ioctl(NULL, cmd);
if (r)
if (!capable(CAP_SYS_RAWIO)) {
DMWARN_LIMIT(
"%s: sending ioctl %x to DM device without required privilege.",
current->comm, cmd);
r = -ENOIOCTLCMD;
goto out;
}
}
r = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
@ -1314,7 +1316,7 @@ static int dm_any_congested(void *congested_data, int bdi_bits)
* With request-based DM we only need to check the
* top-level queue for congestion.
*/
r = md->queue->backing_dev_info.wb.state & bdi_bits;
r = md->queue->backing_dev_info->wb.state & bdi_bits;
} else {
map = dm_get_live_table_fast(md);
if (map)
@ -1397,7 +1399,7 @@ void dm_init_md_queue(struct mapped_device *md)
* - must do so here (in alloc_dev callchain) before queue is used
*/
md->queue->queuedata = md;
md->queue->backing_dev_info.congested_data = md;
md->queue->backing_dev_info->congested_data = md;
}
void dm_init_normal_md_queue(struct mapped_device *md)
@ -1408,7 +1410,7 @@ void dm_init_normal_md_queue(struct mapped_device *md)
/*
* Initialize aspects of queue that aren't relevant for blk-mq
*/
md->queue->backing_dev_info.congested_fn = dm_any_congested;
md->queue->backing_dev_info->congested_fn = dm_any_congested;
blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY);
}
@ -1419,7 +1421,6 @@ static void cleanup_mapped_device(struct mapped_device *md)
if (md->kworker_task)
kthread_stop(md->kworker_task);
mempool_destroy(md->io_pool);
mempool_destroy(md->rq_pool);
if (md->bs)
bioset_free(md->bs);
@ -1595,12 +1596,10 @@ static void __bind_mempools(struct mapped_device *md, struct dm_table *t)
goto out;
}
BUG_ON(!p || md->io_pool || md->rq_pool || md->bs);
BUG_ON(!p || md->io_pool || md->bs);
md->io_pool = p->io_pool;
p->io_pool = NULL;
md->rq_pool = p->rq_pool;
p->rq_pool = NULL;
md->bs = p->bs;
p->bs = NULL;
@ -1777,7 +1776,7 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t)
switch (type) {
case DM_TYPE_REQUEST_BASED:
r = dm_old_init_request_queue(md);
r = dm_old_init_request_queue(md, t);
if (r) {
DMERR("Cannot initialize queue for request-based mapped device");
return r;
@ -2493,7 +2492,6 @@ struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, unsigned t
unsigned integrity, unsigned per_io_data_size)
{
struct dm_md_mempools *pools = kzalloc_node(sizeof(*pools), GFP_KERNEL, md->numa_node_id);
struct kmem_cache *cachep = NULL;
unsigned int pool_size = 0;
unsigned int front_pad;
@ -2503,20 +2501,16 @@ struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, unsigned t
switch (type) {
case DM_TYPE_BIO_BASED:
case DM_TYPE_DAX_BIO_BASED:
cachep = _io_cache;
pool_size = dm_get_reserved_bio_based_ios();
front_pad = roundup(per_io_data_size, __alignof__(struct dm_target_io)) + offsetof(struct dm_target_io, clone);
pools->io_pool = mempool_create_slab_pool(pool_size, _io_cache);
if (!pools->io_pool)
goto out;
break;
case DM_TYPE_REQUEST_BASED:
cachep = _rq_tio_cache;
pool_size = dm_get_reserved_rq_based_ios();
pools->rq_pool = mempool_create_slab_pool(pool_size, _rq_cache);
if (!pools->rq_pool)
goto out;
/* fall through to setup remaining rq-based pools */
case DM_TYPE_MQ_REQUEST_BASED:
if (!pool_size)
pool_size = dm_get_reserved_rq_based_ios();
pool_size = dm_get_reserved_rq_based_ios();
front_pad = offsetof(struct dm_rq_clone_bio_info, clone);
/* per_io_data_size is used for blk-mq pdu at queue allocation */
break;
@ -2524,12 +2518,6 @@ struct dm_md_mempools *dm_alloc_md_mempools(struct mapped_device *md, unsigned t
BUG();
}
if (cachep) {
pools->io_pool = mempool_create_slab_pool(pool_size, cachep);
if (!pools->io_pool)
goto out;
}
pools->bs = bioset_create_nobvec(pool_size, front_pad);
if (!pools->bs)
goto out;
@ -2551,7 +2539,6 @@ void dm_free_md_mempools(struct dm_md_mempools *pools)
return;
mempool_destroy(pools->io_pool);
mempool_destroy(pools->rq_pool);
if (pools->bs)
bioset_free(pools->bs);

3
drivers/md/dm.h
View File

@ -95,8 +95,7 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
/*
* To check whether the target type is request-based or not (bio-based).
*/
#define dm_target_request_based(t) (((t)->type->map_rq != NULL) || \
((t)->type->clone_and_map_rq != NULL))
#define dm_target_request_based(t) ((t)->type->clone_and_map_rq != NULL)
/*
* To check whether the target type is a hybrid (capable of being

2
drivers/md/linear.c
View File

@ -62,7 +62,7 @@ static int linear_congested(struct mddev *mddev, int bits)
for (i = 0; i < mddev->raid_disks && !ret ; i++) {
struct request_queue *q = bdev_get_queue(conf->disks[i].rdev->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
}
return ret;

6
drivers/md/md.c
View File

@ -5346,8 +5346,8 @@ int md_run(struct mddev *mddev)
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mddev->queue);
else
queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, mddev->queue);
mddev->queue->backing_dev_info.congested_data = mddev;
mddev->queue->backing_dev_info.congested_fn = md_congested;
mddev->queue->backing_dev_info->congested_data = mddev;
mddev->queue->backing_dev_info->congested_fn = md_congested;
}
if (pers->sync_request) {
if (mddev->kobj.sd &&
@ -5704,7 +5704,7 @@ static int do_md_stop(struct mddev *mddev, int mode,
__md_stop_writes(mddev);
__md_stop(mddev);
mddev->queue->backing_dev_info.congested_fn = NULL;
mddev->queue->backing_dev_info->congested_fn = NULL;
/* tell userspace to handle 'inactive' */
sysfs_notify_dirent_safe(mddev->sysfs_state);

2
drivers/md/multipath.c
View File

@ -169,7 +169,7 @@ static int multipath_congested(struct mddev *mddev, int bits)
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct request_queue *q = bdev_get_queue(rdev->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
/* Just like multipath_map, we just check the
* first available device
*/

6
drivers/md/raid0.c
View File

@ -41,7 +41,7 @@ static int raid0_congested(struct mddev *mddev, int bits)
for (i = 0; i < raid_disks && !ret ; i++) {
struct request_queue *q = bdev_get_queue(devlist[i]->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
}
return ret;
}
@ -420,8 +420,8 @@ static int raid0_run(struct mddev *mddev)
*/
int stripe = mddev->raid_disks *
(mddev->chunk_sectors << 9) / PAGE_SIZE;
if (mddev->queue->backing_dev_info.ra_pages < 2* stripe)
mddev->queue->backing_dev_info.ra_pages = 2* stripe;
if (mddev->queue->backing_dev_info->ra_pages < 2* stripe)
mddev->queue->backing_dev_info->ra_pages = 2* stripe;
}
dump_zones(mddev);

11
drivers/md/raid1.c
View File

@ -744,9 +744,9 @@ static int raid1_congested(struct mddev *mddev, int bits)
* non-congested targets, it can be removed
*/
if ((bits & (1 << WB_async_congested)) || 1)
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
else
ret &= bdi_congested(&q->backing_dev_info, bits);
ret &= bdi_congested(q->backing_dev_info, bits);
}
}
rcu_read_unlock();
@ -1170,10 +1170,6 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
int i, disks;
struct bitmap *bitmap = mddev->bitmap;
unsigned long flags;
const int op = bio_op(bio);
const unsigned long do_sync = (bio->bi_opf & REQ_SYNC);
const unsigned long do_flush_fua = (bio->bi_opf &
(REQ_PREFLUSH | REQ_FUA));
struct md_rdev *blocked_rdev;
struct blk_plug_cb *cb;
struct raid1_plug_cb *plug = NULL;
@ -1389,7 +1385,8 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
conf->mirrors[i].rdev->data_offset);
mbio->bi_bdev = conf->mirrors[i].rdev->bdev;
mbio->bi_end_io = raid1_end_write_request;
bio_set_op_attrs(mbio, op, do_flush_fua | do_sync);
mbio->bi_opf = bio_op(bio) |
(bio->bi_opf & (REQ_SYNC | REQ_PREFLUSH | REQ_FUA));
if (test_bit(FailFast, &conf->mirrors[i].rdev->flags) &&
!test_bit(WriteMostly, &conf->mirrors[i].rdev->flags) &&
conf->raid_disks - mddev->degraded > 1)

10
drivers/md/raid10.c
View File

@ -860,7 +860,7 @@ static int raid10_congested(struct mddev *mddev, int bits)
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct request_queue *q = bdev_get_queue(rdev->bdev);
ret |= bdi_congested(&q->backing_dev_info, bits);
ret |= bdi_congested(q->backing_dev_info, bits);
}
}
rcu_read_unlock();
@ -3841,8 +3841,8 @@ static int raid10_run(struct mddev *mddev)
* maybe...
*/
stripe /= conf->geo.near_copies;
if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
if (mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
}
if (md_integrity_register(mddev))
@ -4643,8 +4643,8 @@ static void end_reshape(struct r10conf *conf)
int stripe = conf->geo.raid_disks *
((conf->mddev->chunk_sectors << 9) / PAGE_SIZE);
stripe /= conf->geo.near_copies;
if (conf->mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
}
conf->fullsync = 0;
}

12
drivers/md/raid5.c
View File

@ -6331,10 +6331,10 @@ raid5_store_skip_copy(struct mddev *mddev, const char *page, size_t len)
mddev_suspend(mddev);
conf->skip_copy = new;
if (new)
mddev->queue->backing_dev_info.capabilities |=
mddev->queue->backing_dev_info->capabilities |=
BDI_CAP_STABLE_WRITES;
else
mddev->queue->backing_dev_info.capabilities &=
mddev->queue->backing_dev_info->capabilities &=
~BDI_CAP_STABLE_WRITES;
mddev_resume(mddev);
}
@ -7153,8 +7153,8 @@ static int raid5_run(struct mddev *mddev)
int data_disks = conf->previous_raid_disks - conf->max_degraded;
int stripe = data_disks *
((mddev->chunk_sectors << 9) / PAGE_SIZE);
if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
if (mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
chunk_size = mddev->chunk_sectors << 9;
blk_queue_io_min(mddev->queue, chunk_size);
@ -7763,8 +7763,8 @@ static void end_reshape(struct r5conf *conf)
int data_disks = conf->raid_disks - conf->max_degraded;
int stripe = data_disks * ((conf->chunk_sectors << 9)
/ PAGE_SIZE);
if (conf->mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
}
}
}

11
drivers/memstick/core/ms_block.c
View File

@ -2000,16 +2000,6 @@ static int msb_bd_getgeo(struct block_device *bdev,
return 0;
}
static int msb_prepare_req(struct request_queue *q, struct request *req)
{
if (req->cmd_type != REQ_TYPE_FS) {
blk_dump_rq_flags(req, "MS unsupported request");
return BLKPREP_KILL;
}
req->rq_flags |= RQF_DONTPREP;
return BLKPREP_OK;
}
static void msb_submit_req(struct request_queue *q)
{
struct memstick_dev *card = q->queuedata;
@ -2132,7 +2122,6 @@ static int msb_init_disk(struct memstick_dev *card)
}
msb->queue->queuedata = card;
blk_queue_prep_rq(msb->queue, msb_prepare_req);
blk_queue_bounce_limit(msb->queue, limit);
blk_queue_max_hw_sectors(msb->queue, MS_BLOCK_MAX_PAGES);

13
drivers/memstick/core/mspro_block.c
View File

@ -827,18 +827,6 @@ static void mspro_block_start(struct memstick_dev *card)
spin_unlock_irqrestore(&msb->q_lock, flags);
}
static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
{
if (req->cmd_type != REQ_TYPE_FS) {
blk_dump_rq_flags(req, "MSPro unsupported request");
return BLKPREP_KILL;
}
req->rq_flags |= RQF_DONTPREP;
return BLKPREP_OK;
}
static void mspro_block_submit_req(struct request_queue *q)
{
struct memstick_dev *card = q->queuedata;
@ -1228,7 +1216,6 @@ static int mspro_block_init_disk(struct memstick_dev *card)
}
msb->queue->queuedata = card;
blk_queue_prep_rq(msb->queue, mspro_block_prepare_req);
blk_queue_bounce_limit(msb->queue, limit);
blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);

8
drivers/message/fusion/mptsas.c
View File

@ -2320,10 +2320,10 @@ static int mptsas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
SmpPassthroughReply_t *smprep;
smprep = (SmpPassthroughReply_t *)ioc->sas_mgmt.reply;
memcpy(req->sense, smprep, sizeof(*smprep));
req->sense_len = sizeof(*smprep);
req->resid_len = 0;
rsp->resid_len -= smprep->ResponseDataLength;
memcpy(scsi_req(req)->sense, smprep, sizeof(*smprep));
scsi_req(req)->sense_len = sizeof(*smprep);
scsi_req(req)->resid_len = 0;
scsi_req(rsp)->resid_len -= smprep->ResponseDataLength;
} else {
printk(MYIOC_s_ERR_FMT
"%s: smp passthru reply failed to be returned\n",

9
drivers/mmc/core/queue.c
View File

@ -30,15 +30,6 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
{
struct mmc_queue *mq = q->queuedata;
/*
* We only like normal block requests and discards.
*/
if (req->cmd_type != REQ_TYPE_FS && req_op(req) != REQ_OP_DISCARD &&
req_op(req) != REQ_OP_SECURE_ERASE) {
blk_dump_rq_flags(req, "MMC bad request");
return BLKPREP_KILL;
}
if (mq && (mmc_card_removed(mq->card) || mmc_access_rpmb(mq)))
return BLKPREP_KILL;

13
drivers/mtd/mtd_blkdevs.c
View File

@ -84,9 +84,6 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
nsect = blk_rq_cur_bytes(req) >> tr->blkshift;
buf = bio_data(req->bio);
if (req->cmd_type != REQ_TYPE_FS)
return -EIO;
if (req_op(req) == REQ_OP_FLUSH)
return tr->flush(dev);
@ -94,16 +91,16 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
get_capacity(req->rq_disk))
return -EIO;
if (req_op(req) == REQ_OP_DISCARD)
switch (req_op(req)) {
case REQ_OP_DISCARD:
return tr->discard(dev, block, nsect);
if (rq_data_dir(req) == READ) {
case REQ_OP_READ:
for (; nsect > 0; nsect--, block++, buf += tr->blksize)
if (tr->readsect(dev, block, buf))
return -EIO;
rq_flush_dcache_pages(req);
return 0;
} else {
case REQ_OP_WRITE:
if (!tr->writesect)
return -EIO;
@ -112,6 +109,8 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
if (tr->writesect(dev, block, buf))
return -EIO;
return 0;
default:
return -EIO;
}
}

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