96e5d1d3ad
In gfs2_trans_add_bh(), gfs2 was testing if a there was a bd attached to the buffer without having the gfs2_log_lock held. It was then assuming it would stay attached for the rest of the function. However, without either the log lock being held of the buffer locked, __gfs2_ail_flush() could detach bd at any time. This patch moves the locking before the test. If there isn't a bd already attached, gfs2 can safely allocate one and attach it before locking. There is no way that the newly allocated bd could be on the ail list, and thus no way for __gfs2_ail_flush() to detach it. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
928 lines
23 KiB
C
928 lines
23 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/mempool.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/fs.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "inode.h"
|
|
#include "glock.h"
|
|
#include "log.h"
|
|
#include "lops.h"
|
|
#include "meta_io.h"
|
|
#include "recovery.h"
|
|
#include "rgrp.h"
|
|
#include "trans.h"
|
|
#include "util.h"
|
|
#include "trace_gfs2.h"
|
|
|
|
/**
|
|
* gfs2_pin - Pin a buffer in memory
|
|
* @sdp: The superblock
|
|
* @bh: The buffer to be pinned
|
|
*
|
|
* The log lock must be held when calling this function
|
|
*/
|
|
static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
|
|
{
|
|
struct gfs2_bufdata *bd;
|
|
|
|
BUG_ON(!current->journal_info);
|
|
|
|
clear_buffer_dirty(bh);
|
|
if (test_set_buffer_pinned(bh))
|
|
gfs2_assert_withdraw(sdp, 0);
|
|
if (!buffer_uptodate(bh))
|
|
gfs2_io_error_bh(sdp, bh);
|
|
bd = bh->b_private;
|
|
/* If this buffer is in the AIL and it has already been written
|
|
* to in-place disk block, remove it from the AIL.
|
|
*/
|
|
spin_lock(&sdp->sd_ail_lock);
|
|
if (bd->bd_ail)
|
|
list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list);
|
|
spin_unlock(&sdp->sd_ail_lock);
|
|
get_bh(bh);
|
|
atomic_inc(&sdp->sd_log_pinned);
|
|
trace_gfs2_pin(bd, 1);
|
|
}
|
|
|
|
static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
|
|
{
|
|
return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP;
|
|
}
|
|
|
|
static void maybe_release_space(struct gfs2_bufdata *bd)
|
|
{
|
|
struct gfs2_glock *gl = bd->bd_gl;
|
|
struct gfs2_sbd *sdp = gl->gl_sbd;
|
|
struct gfs2_rgrpd *rgd = gl->gl_object;
|
|
unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
|
|
struct gfs2_bitmap *bi = rgd->rd_bits + index;
|
|
|
|
if (bi->bi_clone == 0)
|
|
return;
|
|
if (sdp->sd_args.ar_discard)
|
|
gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
|
|
memcpy(bi->bi_clone + bi->bi_offset,
|
|
bd->bd_bh->b_data + bi->bi_offset, bi->bi_len);
|
|
clear_bit(GBF_FULL, &bi->bi_flags);
|
|
rgd->rd_free_clone = rgd->rd_free;
|
|
}
|
|
|
|
/**
|
|
* gfs2_unpin - Unpin a buffer
|
|
* @sdp: the filesystem the buffer belongs to
|
|
* @bh: The buffer to unpin
|
|
* @ai:
|
|
* @flags: The inode dirty flags
|
|
*
|
|
*/
|
|
|
|
static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
|
|
struct gfs2_ail *ai)
|
|
{
|
|
struct gfs2_bufdata *bd = bh->b_private;
|
|
|
|
BUG_ON(!buffer_uptodate(bh));
|
|
BUG_ON(!buffer_pinned(bh));
|
|
|
|
lock_buffer(bh);
|
|
mark_buffer_dirty(bh);
|
|
clear_buffer_pinned(bh);
|
|
|
|
if (buffer_is_rgrp(bd))
|
|
maybe_release_space(bd);
|
|
|
|
spin_lock(&sdp->sd_ail_lock);
|
|
if (bd->bd_ail) {
|
|
list_del(&bd->bd_ail_st_list);
|
|
brelse(bh);
|
|
} else {
|
|
struct gfs2_glock *gl = bd->bd_gl;
|
|
list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
|
|
atomic_inc(&gl->gl_ail_count);
|
|
}
|
|
bd->bd_ail = ai;
|
|
list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
|
|
spin_unlock(&sdp->sd_ail_lock);
|
|
|
|
clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
|
|
trace_gfs2_pin(bd, 0);
|
|
unlock_buffer(bh);
|
|
atomic_dec(&sdp->sd_log_pinned);
|
|
}
|
|
|
|
static void gfs2_log_incr_head(struct gfs2_sbd *sdp)
|
|
{
|
|
BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
|
|
(sdp->sd_log_flush_head != sdp->sd_log_head));
|
|
|
|
if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) {
|
|
sdp->sd_log_flush_head = 0;
|
|
sdp->sd_log_flush_wrapped = 1;
|
|
}
|
|
}
|
|
|
|
static u64 gfs2_log_bmap(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int lbn = sdp->sd_log_flush_head;
|
|
struct gfs2_journal_extent *je;
|
|
u64 block;
|
|
|
|
list_for_each_entry(je, &sdp->sd_jdesc->extent_list, extent_list) {
|
|
if (lbn >= je->lblock && lbn < je->lblock + je->blocks) {
|
|
block = je->dblock + lbn - je->lblock;
|
|
gfs2_log_incr_head(sdp);
|
|
return block;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* gfs2_end_log_write_bh - end log write of pagecache data with buffers
|
|
* @sdp: The superblock
|
|
* @bvec: The bio_vec
|
|
* @error: The i/o status
|
|
*
|
|
* This finds the relavent buffers and unlocks then and sets the
|
|
* error flag according to the status of the i/o request. This is
|
|
* used when the log is writing data which has an in-place version
|
|
* that is pinned in the pagecache.
|
|
*/
|
|
|
|
static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec,
|
|
int error)
|
|
{
|
|
struct buffer_head *bh, *next;
|
|
struct page *page = bvec->bv_page;
|
|
unsigned size;
|
|
|
|
bh = page_buffers(page);
|
|
size = bvec->bv_len;
|
|
while (bh_offset(bh) < bvec->bv_offset)
|
|
bh = bh->b_this_page;
|
|
do {
|
|
if (error)
|
|
set_buffer_write_io_error(bh);
|
|
unlock_buffer(bh);
|
|
next = bh->b_this_page;
|
|
size -= bh->b_size;
|
|
brelse(bh);
|
|
bh = next;
|
|
} while(bh && size);
|
|
}
|
|
|
|
/**
|
|
* gfs2_end_log_write - end of i/o to the log
|
|
* @bio: The bio
|
|
* @error: Status of i/o request
|
|
*
|
|
* Each bio_vec contains either data from the pagecache or data
|
|
* relating to the log itself. Here we iterate over the bio_vec
|
|
* array, processing both kinds of data.
|
|
*
|
|
*/
|
|
|
|
static void gfs2_end_log_write(struct bio *bio, int error)
|
|
{
|
|
struct gfs2_sbd *sdp = bio->bi_private;
|
|
struct bio_vec *bvec;
|
|
struct page *page;
|
|
int i;
|
|
|
|
if (error) {
|
|
sdp->sd_log_error = error;
|
|
fs_err(sdp, "Error %d writing to log\n", error);
|
|
}
|
|
|
|
bio_for_each_segment(bvec, bio, i) {
|
|
page = bvec->bv_page;
|
|
if (page_has_buffers(page))
|
|
gfs2_end_log_write_bh(sdp, bvec, error);
|
|
else
|
|
mempool_free(page, gfs2_page_pool);
|
|
}
|
|
|
|
bio_put(bio);
|
|
if (atomic_dec_and_test(&sdp->sd_log_in_flight))
|
|
wake_up(&sdp->sd_log_flush_wait);
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_flush_bio - Submit any pending log bio
|
|
* @sdp: The superblock
|
|
* @rw: The rw flags
|
|
*
|
|
* Submit any pending part-built or full bio to the block device. If
|
|
* there is no pending bio, then this is a no-op.
|
|
*/
|
|
|
|
void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw)
|
|
{
|
|
if (sdp->sd_log_bio) {
|
|
atomic_inc(&sdp->sd_log_in_flight);
|
|
submit_bio(rw, sdp->sd_log_bio);
|
|
sdp->sd_log_bio = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_alloc_bio - Allocate a new bio for log writing
|
|
* @sdp: The superblock
|
|
* @blkno: The next device block number we want to write to
|
|
*
|
|
* This should never be called when there is a cached bio in the
|
|
* super block. When it returns, there will be a cached bio in the
|
|
* super block which will have as many bio_vecs as the device is
|
|
* happy to handle.
|
|
*
|
|
* Returns: Newly allocated bio
|
|
*/
|
|
|
|
static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno)
|
|
{
|
|
struct super_block *sb = sdp->sd_vfs;
|
|
unsigned nrvecs = bio_get_nr_vecs(sb->s_bdev);
|
|
struct bio *bio;
|
|
|
|
BUG_ON(sdp->sd_log_bio);
|
|
|
|
while (1) {
|
|
bio = bio_alloc(GFP_NOIO, nrvecs);
|
|
if (likely(bio))
|
|
break;
|
|
nrvecs = max(nrvecs/2, 1U);
|
|
}
|
|
|
|
bio->bi_sector = blkno * (sb->s_blocksize >> 9);
|
|
bio->bi_bdev = sb->s_bdev;
|
|
bio->bi_end_io = gfs2_end_log_write;
|
|
bio->bi_private = sdp;
|
|
|
|
sdp->sd_log_bio = bio;
|
|
|
|
return bio;
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_get_bio - Get cached log bio, or allocate a new one
|
|
* @sdp: The superblock
|
|
* @blkno: The device block number we want to write to
|
|
*
|
|
* If there is a cached bio, then if the next block number is sequential
|
|
* with the previous one, return it, otherwise flush the bio to the
|
|
* device. If there is not a cached bio, or we just flushed it, then
|
|
* allocate a new one.
|
|
*
|
|
* Returns: The bio to use for log writes
|
|
*/
|
|
|
|
static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno)
|
|
{
|
|
struct bio *bio = sdp->sd_log_bio;
|
|
u64 nblk;
|
|
|
|
if (bio) {
|
|
nblk = bio->bi_sector + bio_sectors(bio);
|
|
nblk >>= sdp->sd_fsb2bb_shift;
|
|
if (blkno == nblk)
|
|
return bio;
|
|
gfs2_log_flush_bio(sdp, WRITE);
|
|
}
|
|
|
|
return gfs2_log_alloc_bio(sdp, blkno);
|
|
}
|
|
|
|
|
|
/**
|
|
* gfs2_log_write - write to log
|
|
* @sdp: the filesystem
|
|
* @page: the page to write
|
|
* @size: the size of the data to write
|
|
* @offset: the offset within the page
|
|
*
|
|
* Try and add the page segment to the current bio. If that fails,
|
|
* submit the current bio to the device and create a new one, and
|
|
* then add the page segment to that.
|
|
*/
|
|
|
|
static void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
|
|
unsigned size, unsigned offset)
|
|
{
|
|
u64 blkno = gfs2_log_bmap(sdp);
|
|
struct bio *bio;
|
|
int ret;
|
|
|
|
bio = gfs2_log_get_bio(sdp, blkno);
|
|
ret = bio_add_page(bio, page, size, offset);
|
|
if (ret == 0) {
|
|
gfs2_log_flush_bio(sdp, WRITE);
|
|
bio = gfs2_log_alloc_bio(sdp, blkno);
|
|
ret = bio_add_page(bio, page, size, offset);
|
|
WARN_ON(ret == 0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_write_bh - write a buffer's content to the log
|
|
* @sdp: The super block
|
|
* @bh: The buffer pointing to the in-place location
|
|
*
|
|
* This writes the content of the buffer to the next available location
|
|
* in the log. The buffer will be unlocked once the i/o to the log has
|
|
* completed.
|
|
*/
|
|
|
|
static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh)
|
|
{
|
|
gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh));
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_write_page - write one block stored in a page, into the log
|
|
* @sdp: The superblock
|
|
* @page: The struct page
|
|
*
|
|
* This writes the first block-sized part of the page into the log. Note
|
|
* that the page must have been allocated from the gfs2_page_pool mempool
|
|
* and that after this has been called, ownership has been transferred and
|
|
* the page may be freed at any time.
|
|
*/
|
|
|
|
void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
|
|
{
|
|
struct super_block *sb = sdp->sd_vfs;
|
|
gfs2_log_write(sdp, page, sb->s_blocksize, 0);
|
|
}
|
|
|
|
static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type,
|
|
u32 ld_length, u32 ld_data1)
|
|
{
|
|
struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
struct gfs2_log_descriptor *ld = page_address(page);
|
|
clear_page(ld);
|
|
ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
|
|
ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
|
|
ld->ld_type = cpu_to_be32(ld_type);
|
|
ld->ld_length = cpu_to_be32(ld_length);
|
|
ld->ld_data1 = cpu_to_be32(ld_data1);
|
|
ld->ld_data2 = 0;
|
|
return page;
|
|
}
|
|
|
|
static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
|
|
{
|
|
struct gfs2_meta_header *mh;
|
|
struct gfs2_trans *tr;
|
|
|
|
tr = current->journal_info;
|
|
tr->tr_touched = 1;
|
|
if (!list_empty(&bd->bd_list))
|
|
return;
|
|
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
|
|
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
|
|
mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
|
|
if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
|
|
printk(KERN_ERR
|
|
"Attempting to add uninitialised block to journal (inplace block=%lld)\n",
|
|
(unsigned long long)bd->bd_bh->b_blocknr);
|
|
BUG();
|
|
}
|
|
gfs2_pin(sdp, bd->bd_bh);
|
|
mh->__pad0 = cpu_to_be64(0);
|
|
mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
|
|
sdp->sd_log_num_buf++;
|
|
list_add(&bd->bd_list, &sdp->sd_log_le_buf);
|
|
tr->tr_num_buf_new++;
|
|
}
|
|
|
|
static void gfs2_check_magic(struct buffer_head *bh)
|
|
{
|
|
void *kaddr;
|
|
__be32 *ptr;
|
|
|
|
clear_buffer_escaped(bh);
|
|
kaddr = kmap_atomic(bh->b_page);
|
|
ptr = kaddr + bh_offset(bh);
|
|
if (*ptr == cpu_to_be32(GFS2_MAGIC))
|
|
set_buffer_escaped(bh);
|
|
kunmap_atomic(kaddr);
|
|
}
|
|
|
|
static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
|
|
unsigned int total, struct list_head *blist,
|
|
bool is_databuf)
|
|
{
|
|
struct gfs2_log_descriptor *ld;
|
|
struct gfs2_bufdata *bd1 = NULL, *bd2;
|
|
struct page *page;
|
|
unsigned int num;
|
|
unsigned n;
|
|
__be64 *ptr;
|
|
|
|
gfs2_log_lock(sdp);
|
|
bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list);
|
|
while(total) {
|
|
num = total;
|
|
if (total > limit)
|
|
num = limit;
|
|
gfs2_log_unlock(sdp);
|
|
page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA, num + 1, num);
|
|
ld = page_address(page);
|
|
gfs2_log_lock(sdp);
|
|
ptr = (__be64 *)(ld + 1);
|
|
|
|
n = 0;
|
|
list_for_each_entry_continue(bd1, blist, bd_list) {
|
|
*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
|
|
if (is_databuf) {
|
|
gfs2_check_magic(bd1->bd_bh);
|
|
*ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0);
|
|
}
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
gfs2_log_unlock(sdp);
|
|
gfs2_log_write_page(sdp, page);
|
|
gfs2_log_lock(sdp);
|
|
|
|
n = 0;
|
|
list_for_each_entry_continue(bd2, blist, bd_list) {
|
|
get_bh(bd2->bd_bh);
|
|
gfs2_log_unlock(sdp);
|
|
lock_buffer(bd2->bd_bh);
|
|
|
|
if (buffer_escaped(bd2->bd_bh)) {
|
|
void *kaddr;
|
|
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
ptr = page_address(page);
|
|
kaddr = kmap_atomic(bd2->bd_bh->b_page);
|
|
memcpy(ptr, kaddr + bh_offset(bd2->bd_bh),
|
|
bd2->bd_bh->b_size);
|
|
kunmap_atomic(kaddr);
|
|
*(__be32 *)ptr = 0;
|
|
clear_buffer_escaped(bd2->bd_bh);
|
|
unlock_buffer(bd2->bd_bh);
|
|
brelse(bd2->bd_bh);
|
|
gfs2_log_write_page(sdp, page);
|
|
} else {
|
|
gfs2_log_write_bh(sdp, bd2->bd_bh);
|
|
}
|
|
gfs2_log_lock(sdp);
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
BUG_ON(total < num);
|
|
total -= num;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static void buf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */
|
|
|
|
gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf,
|
|
&sdp->sd_log_le_buf, 0);
|
|
}
|
|
|
|
static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_buf;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
|
|
list_del_init(&bd->bd_list);
|
|
sdp->sd_log_num_buf--;
|
|
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
|
|
}
|
|
|
|
static void buf_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (pass != 0)
|
|
return;
|
|
|
|
sdp->sd_found_blocks = 0;
|
|
sdp->sd_replayed_blocks = 0;
|
|
}
|
|
|
|
static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld, __be64 *ptr,
|
|
int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
unsigned int blks = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh_log, *bh_ip;
|
|
u64 blkno;
|
|
int error = 0;
|
|
|
|
if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
|
|
return 0;
|
|
|
|
gfs2_replay_incr_blk(sdp, &start);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
|
|
sdp->sd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(sdp, blkno, start))
|
|
continue;
|
|
|
|
error = gfs2_replay_read_block(jd, start, &bh_log);
|
|
if (error)
|
|
return error;
|
|
|
|
bh_ip = gfs2_meta_new(gl, blkno);
|
|
memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
|
|
|
|
if (gfs2_meta_check(sdp, bh_ip))
|
|
error = -EIO;
|
|
else
|
|
mark_buffer_dirty(bh_ip);
|
|
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
|
|
if (error)
|
|
break;
|
|
|
|
sdp->sd_replayed_blocks++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_meta_sync(ip->i_gl);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
gfs2_meta_sync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
|
|
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
|
|
}
|
|
|
|
static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
|
|
{
|
|
struct gfs2_glock *gl = bd->bd_gl;
|
|
struct gfs2_trans *tr;
|
|
|
|
tr = current->journal_info;
|
|
tr->tr_touched = 1;
|
|
tr->tr_num_revoke++;
|
|
sdp->sd_log_num_revoke++;
|
|
atomic_inc(&gl->gl_revokes);
|
|
set_bit(GLF_LFLUSH, &gl->gl_flags);
|
|
list_add(&bd->bd_list, &sdp->sd_log_le_revoke);
|
|
}
|
|
|
|
static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_meta_header *mh;
|
|
unsigned int offset;
|
|
struct list_head *head = &sdp->sd_log_le_revoke;
|
|
struct gfs2_bufdata *bd;
|
|
struct page *page;
|
|
unsigned int length;
|
|
|
|
if (!sdp->sd_log_num_revoke)
|
|
return;
|
|
|
|
length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64));
|
|
page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
list_for_each_entry(bd, head, bd_list) {
|
|
sdp->sd_log_num_revoke--;
|
|
|
|
if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
|
|
|
|
gfs2_log_write_page(sdp, page);
|
|
page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
|
|
mh = page_address(page);
|
|
clear_page(mh);
|
|
mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
|
|
mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
|
|
offset = sizeof(struct gfs2_meta_header);
|
|
}
|
|
|
|
*(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno);
|
|
offset += sizeof(u64);
|
|
}
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
|
|
|
|
gfs2_log_write_page(sdp, page);
|
|
}
|
|
|
|
static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_revoke;
|
|
struct gfs2_bufdata *bd;
|
|
struct gfs2_glock *gl;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
|
|
list_del_init(&bd->bd_list);
|
|
gl = bd->bd_gl;
|
|
atomic_dec(&gl->gl_revokes);
|
|
clear_bit(GLF_LFLUSH, &gl->gl_flags);
|
|
kmem_cache_free(gfs2_bufdata_cachep, bd);
|
|
}
|
|
}
|
|
|
|
static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (pass != 0)
|
|
return;
|
|
|
|
sdp->sd_found_revokes = 0;
|
|
sdp->sd_replay_tail = head->lh_tail;
|
|
}
|
|
|
|
static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld, __be64 *ptr,
|
|
int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
unsigned int blks = be32_to_cpu(ld->ld_length);
|
|
unsigned int revokes = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh;
|
|
unsigned int offset;
|
|
u64 blkno;
|
|
int first = 1;
|
|
int error;
|
|
|
|
if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
|
|
return 0;
|
|
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
error = gfs2_replay_read_block(jd, start, &bh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!first)
|
|
gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
|
|
|
|
while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
|
|
blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
|
|
|
|
error = gfs2_revoke_add(sdp, blkno, start);
|
|
if (error < 0) {
|
|
brelse(bh);
|
|
return error;
|
|
}
|
|
else if (error)
|
|
sdp->sd_found_revokes++;
|
|
|
|
if (!--revokes)
|
|
break;
|
|
offset += sizeof(u64);
|
|
}
|
|
|
|
brelse(bh);
|
|
offset = sizeof(struct gfs2_meta_header);
|
|
first = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_revoke_clean(sdp);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
fs_info(sdp, "jid=%u: Found %u revoke tags\n",
|
|
jd->jd_jid, sdp->sd_found_revokes);
|
|
|
|
gfs2_revoke_clean(sdp);
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_add - Add a databuf to the transaction.
|
|
*
|
|
* This is used in two distinct cases:
|
|
* i) In ordered write mode
|
|
* We put the data buffer on a list so that we can ensure that its
|
|
* synced to disk at the right time
|
|
* ii) In journaled data mode
|
|
* We need to journal the data block in the same way as metadata in
|
|
* the functions above. The difference is that here we have a tag
|
|
* which is two __be64's being the block number (as per meta data)
|
|
* and a flag which says whether the data block needs escaping or
|
|
* not. This means we need a new log entry for each 251 or so data
|
|
* blocks, which isn't an enormous overhead but twice as much as
|
|
* for normal metadata blocks.
|
|
*/
|
|
static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
|
|
{
|
|
struct gfs2_trans *tr = current->journal_info;
|
|
struct address_space *mapping = bd->bd_bh->b_page->mapping;
|
|
struct gfs2_inode *ip = GFS2_I(mapping->host);
|
|
|
|
if (tr)
|
|
tr->tr_touched = 1;
|
|
if (!list_empty(&bd->bd_list))
|
|
return;
|
|
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
|
|
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
|
|
if (gfs2_is_jdata(ip)) {
|
|
gfs2_pin(sdp, bd->bd_bh);
|
|
tr->tr_num_databuf_new++;
|
|
sdp->sd_log_num_databuf++;
|
|
list_add_tail(&bd->bd_list, &sdp->sd_log_le_databuf);
|
|
} else {
|
|
list_add_tail(&bd->bd_list, &sdp->sd_log_le_ordered);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_before_commit - Scan the data buffers, writing as we go
|
|
*
|
|
*/
|
|
|
|
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int limit = buf_limit(sdp) / 2;
|
|
|
|
gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf,
|
|
&sdp->sd_log_le_databuf, 1);
|
|
}
|
|
|
|
static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld,
|
|
__be64 *ptr, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
unsigned int blks = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh_log, *bh_ip;
|
|
u64 blkno;
|
|
u64 esc;
|
|
int error = 0;
|
|
|
|
if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
|
|
return 0;
|
|
|
|
gfs2_replay_incr_blk(sdp, &start);
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
esc = be64_to_cpu(*ptr++);
|
|
|
|
sdp->sd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(sdp, blkno, start))
|
|
continue;
|
|
|
|
error = gfs2_replay_read_block(jd, start, &bh_log);
|
|
if (error)
|
|
return error;
|
|
|
|
bh_ip = gfs2_meta_new(gl, blkno);
|
|
memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
|
|
|
|
/* Unescape */
|
|
if (esc) {
|
|
__be32 *eptr = (__be32 *)bh_ip->b_data;
|
|
*eptr = cpu_to_be32(GFS2_MAGIC);
|
|
}
|
|
mark_buffer_dirty(bh_ip);
|
|
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
|
|
sdp->sd_replayed_blocks++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/* FIXME: sort out accounting for log blocks etc. */
|
|
|
|
static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_meta_sync(ip->i_gl);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
/* data sync? */
|
|
gfs2_meta_sync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
|
|
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
|
|
}
|
|
|
|
static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_databuf;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
|
|
list_del_init(&bd->bd_list);
|
|
sdp->sd_log_num_databuf--;
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
|
|
}
|
|
|
|
|
|
const struct gfs2_log_operations gfs2_buf_lops = {
|
|
.lo_add = buf_lo_add,
|
|
.lo_before_commit = buf_lo_before_commit,
|
|
.lo_after_commit = buf_lo_after_commit,
|
|
.lo_before_scan = buf_lo_before_scan,
|
|
.lo_scan_elements = buf_lo_scan_elements,
|
|
.lo_after_scan = buf_lo_after_scan,
|
|
.lo_name = "buf",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_revoke_lops = {
|
|
.lo_add = revoke_lo_add,
|
|
.lo_before_commit = revoke_lo_before_commit,
|
|
.lo_after_commit = revoke_lo_after_commit,
|
|
.lo_before_scan = revoke_lo_before_scan,
|
|
.lo_scan_elements = revoke_lo_scan_elements,
|
|
.lo_after_scan = revoke_lo_after_scan,
|
|
.lo_name = "revoke",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_rg_lops = {
|
|
.lo_name = "rg",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_databuf_lops = {
|
|
.lo_add = databuf_lo_add,
|
|
.lo_before_commit = databuf_lo_before_commit,
|
|
.lo_after_commit = databuf_lo_after_commit,
|
|
.lo_scan_elements = databuf_lo_scan_elements,
|
|
.lo_after_scan = databuf_lo_after_scan,
|
|
.lo_name = "databuf",
|
|
};
|
|
|
|
const struct gfs2_log_operations *gfs2_log_ops[] = {
|
|
&gfs2_databuf_lops,
|
|
&gfs2_buf_lops,
|
|
&gfs2_rg_lops,
|
|
&gfs2_revoke_lops,
|
|
NULL,
|
|
};
|
|
|