b7495fc2ff
We used to infer alignment of IOs within a page based on the file offset, which assumed they matched. This broke with direct IO that was not aligned to pages (e.g., 512-byte aligned IO). We were also trusting the alignment specified in the OSD reply, which could have been adjusted by the server. Explicitly specify the page alignment when setting up OSD IO requests. Signed-off-by: Sage Weil <sage@newdream.net>
238 lines
7 KiB
C
238 lines
7 KiB
C
#ifndef _FS_CEPH_OSD_CLIENT_H
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#define _FS_CEPH_OSD_CLIENT_H
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#include <linux/completion.h>
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#include <linux/kref.h>
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#include <linux/mempool.h>
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#include <linux/rbtree.h>
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#include "types.h"
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#include "osdmap.h"
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#include "messenger.h"
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struct ceph_msg;
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struct ceph_snap_context;
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struct ceph_osd_request;
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struct ceph_osd_client;
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struct ceph_authorizer;
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struct ceph_pagelist;
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/*
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* completion callback for async writepages
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*/
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typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
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struct ceph_msg *);
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/* a given osd we're communicating with */
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struct ceph_osd {
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atomic_t o_ref;
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struct ceph_osd_client *o_osdc;
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int o_osd;
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int o_incarnation;
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struct rb_node o_node;
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struct ceph_connection o_con;
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struct list_head o_requests;
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struct list_head o_osd_lru;
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struct ceph_authorizer *o_authorizer;
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void *o_authorizer_buf, *o_authorizer_reply_buf;
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size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
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unsigned long lru_ttl;
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int o_marked_for_keepalive;
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struct list_head o_keepalive_item;
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};
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/* an in-flight request */
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struct ceph_osd_request {
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u64 r_tid; /* unique for this client */
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struct rb_node r_node;
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struct list_head r_req_lru_item;
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struct list_head r_osd_item;
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struct ceph_osd *r_osd;
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struct ceph_pg r_pgid;
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int r_pg_osds[CEPH_PG_MAX_SIZE];
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int r_num_pg_osds;
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struct ceph_connection *r_con_filling_msg;
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struct ceph_msg *r_request, *r_reply;
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int r_result;
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int r_flags; /* any additional flags for the osd */
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u32 r_sent; /* >0 if r_request is sending/sent */
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int r_got_reply;
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struct ceph_osd_client *r_osdc;
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struct kref r_kref;
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bool r_mempool;
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struct completion r_completion, r_safe_completion;
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ceph_osdc_callback_t r_callback, r_safe_callback;
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struct ceph_eversion r_reassert_version;
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struct list_head r_unsafe_item;
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struct inode *r_inode; /* for use by callbacks */
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void *r_priv; /* ditto */
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char r_oid[40]; /* object name */
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int r_oid_len;
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unsigned long r_stamp; /* send OR check time */
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bool r_resend; /* msg send failed, needs retry */
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struct ceph_file_layout r_file_layout;
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struct ceph_snap_context *r_snapc; /* snap context for writes */
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unsigned r_num_pages; /* size of page array (follows) */
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unsigned r_page_alignment; /* io offset in first page */
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struct page **r_pages; /* pages for data payload */
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int r_pages_from_pool;
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int r_own_pages; /* if true, i own page list */
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#ifdef CONFIG_BLOCK
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struct bio *r_bio; /* instead of pages */
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#endif
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struct ceph_pagelist *r_trail; /* trailing part of the data */
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};
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struct ceph_osd_client {
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struct ceph_client *client;
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struct ceph_osdmap *osdmap; /* current map */
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struct rw_semaphore map_sem;
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struct completion map_waiters;
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u64 last_requested_map;
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struct mutex request_mutex;
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struct rb_root osds; /* osds */
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struct list_head osd_lru; /* idle osds */
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u64 timeout_tid; /* tid of timeout triggering rq */
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u64 last_tid; /* tid of last request */
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struct rb_root requests; /* pending requests */
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struct list_head req_lru; /* pending requests lru */
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int num_requests;
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struct delayed_work timeout_work;
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struct delayed_work osds_timeout_work;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_file;
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#endif
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mempool_t *req_mempool;
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struct ceph_msgpool msgpool_op;
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struct ceph_msgpool msgpool_op_reply;
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};
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struct ceph_osd_req_op {
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u16 op; /* CEPH_OSD_OP_* */
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u32 flags; /* CEPH_OSD_FLAG_* */
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union {
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struct {
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u64 offset, length;
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u64 truncate_size;
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u32 truncate_seq;
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} extent;
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struct {
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const char *name;
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u32 name_len;
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const char *val;
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u32 value_len;
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__u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
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__u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
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} xattr;
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struct {
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const char *class_name;
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__u8 class_len;
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const char *method_name;
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__u8 method_len;
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__u8 argc;
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const char *indata;
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u32 indata_len;
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} cls;
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struct {
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u64 cookie, count;
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} pgls;
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struct {
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u64 snapid;
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} snap;
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};
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u32 payload_len;
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};
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extern int ceph_osdc_init(struct ceph_osd_client *osdc,
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struct ceph_client *client);
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extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
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extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
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struct ceph_msg *msg);
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extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
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struct ceph_msg *msg);
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extern void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
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struct ceph_file_layout *layout,
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u64 snapid,
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u64 off, u64 *plen, u64 *bno,
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struct ceph_osd_request *req,
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struct ceph_osd_req_op *op);
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extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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int flags,
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struct ceph_snap_context *snapc,
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struct ceph_osd_req_op *ops,
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bool use_mempool,
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gfp_t gfp_flags,
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struct page **pages,
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struct bio *bio);
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extern void ceph_osdc_build_request(struct ceph_osd_request *req,
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u64 off, u64 *plen,
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struct ceph_osd_req_op *src_ops,
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struct ceph_snap_context *snapc,
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struct timespec *mtime,
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const char *oid,
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int oid_len);
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extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
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struct ceph_file_layout *layout,
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struct ceph_vino vino,
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u64 offset, u64 *len, int op, int flags,
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struct ceph_snap_context *snapc,
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int do_sync, u32 truncate_seq,
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u64 truncate_size,
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struct timespec *mtime,
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bool use_mempool, int num_reply,
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int page_align);
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static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
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{
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kref_get(&req->r_kref);
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}
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extern void ceph_osdc_release_request(struct kref *kref);
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static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
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{
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kref_put(&req->r_kref, ceph_osdc_release_request);
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}
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extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req,
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bool nofail);
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extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
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extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
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struct ceph_vino vino,
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struct ceph_file_layout *layout,
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u64 off, u64 *plen,
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u32 truncate_seq, u64 truncate_size,
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struct page **pages, int nr_pages,
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int page_align);
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extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
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struct ceph_vino vino,
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struct ceph_file_layout *layout,
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struct ceph_snap_context *sc,
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u64 off, u64 len,
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u32 truncate_seq, u64 truncate_size,
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struct timespec *mtime,
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struct page **pages, int nr_pages,
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int flags, int do_sync, bool nofail);
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#endif
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