1 #ifndef _FS_CEPH_OSD_CLIENT_H
2 #define _FS_CEPH_OSD_CLIENT_H
4 #include <linux/completion.h>
5 #include <linux/kref.h>
6 #include <linux/mempool.h>
7 #include <linux/rbtree.h>
11 #include "messenger.h"
14 struct ceph_snap_context;
15 struct ceph_osd_request;
16 struct ceph_osd_client;
17 struct ceph_authorizer;
21 * completion callback for async writepages
23 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
26 /* a given osd we're communicating with */
29 struct ceph_osd_client *o_osdc;
32 struct rb_node o_node;
33 struct ceph_connection o_con;
34 struct list_head o_requests;
35 struct list_head o_osd_lru;
36 struct ceph_authorizer *o_authorizer;
37 void *o_authorizer_buf, *o_authorizer_reply_buf;
38 size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
39 unsigned long lru_ttl;
40 int o_marked_for_keepalive;
41 struct list_head o_keepalive_item;
44 /* an in-flight request */
45 struct ceph_osd_request {
46 u64 r_tid; /* unique for this client */
47 struct rb_node r_node;
48 struct list_head r_req_lru_item;
49 struct list_head r_osd_item;
50 struct ceph_osd *r_osd;
51 struct ceph_pg r_pgid;
52 int r_pg_osds[CEPH_PG_MAX_SIZE];
55 struct ceph_connection *r_con_filling_msg;
57 struct ceph_msg *r_request, *r_reply;
59 int r_flags; /* any additional flags for the osd */
60 u32 r_sent; /* >0 if r_request is sending/sent */
63 struct ceph_osd_client *r_osdc;
66 struct completion r_completion, r_safe_completion;
67 ceph_osdc_callback_t r_callback, r_safe_callback;
68 struct ceph_eversion r_reassert_version;
69 struct list_head r_unsafe_item;
71 struct inode *r_inode; /* for use by callbacks */
72 void *r_priv; /* ditto */
74 char r_oid[40]; /* object name */
76 unsigned long r_stamp; /* send OR check time */
77 bool r_resend; /* msg send failed, needs retry */
79 struct ceph_file_layout r_file_layout;
80 struct ceph_snap_context *r_snapc; /* snap context for writes */
81 unsigned r_num_pages; /* size of page array (follows) */
82 unsigned r_page_alignment; /* io offset in first page */
83 struct page **r_pages; /* pages for data payload */
84 int r_pages_from_pool;
85 int r_own_pages; /* if true, i own page list */
87 struct bio *r_bio; /* instead of pages */
90 struct ceph_pagelist *r_trail; /* trailing part of the data */
93 struct ceph_osd_client {
94 struct ceph_client *client;
96 struct ceph_osdmap *osdmap; /* current map */
97 struct rw_semaphore map_sem;
98 struct completion map_waiters;
99 u64 last_requested_map;
101 struct mutex request_mutex;
102 struct rb_root osds; /* osds */
103 struct list_head osd_lru; /* idle osds */
104 u64 timeout_tid; /* tid of timeout triggering rq */
105 u64 last_tid; /* tid of last request */
106 struct rb_root requests; /* pending requests */
107 struct list_head req_lru; /* pending requests lru */
109 struct delayed_work timeout_work;
110 struct delayed_work osds_timeout_work;
111 #ifdef CONFIG_DEBUG_FS
112 struct dentry *debugfs_file;
115 mempool_t *req_mempool;
117 struct ceph_msgpool msgpool_op;
118 struct ceph_msgpool msgpool_op_reply;
121 struct ceph_osd_req_op {
122 u16 op; /* CEPH_OSD_OP_* */
123 u32 flags; /* CEPH_OSD_FLAG_* */
135 __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
136 __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
139 const char *class_name;
141 const char *method_name;
157 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
158 struct ceph_client *client);
159 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
161 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
162 struct ceph_msg *msg);
163 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
164 struct ceph_msg *msg);
166 extern void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
167 struct ceph_file_layout *layout,
169 u64 off, u64 *plen, u64 *bno,
170 struct ceph_osd_request *req,
171 struct ceph_osd_req_op *op);
173 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
175 struct ceph_snap_context *snapc,
176 struct ceph_osd_req_op *ops,
182 extern void ceph_osdc_build_request(struct ceph_osd_request *req,
184 struct ceph_osd_req_op *src_ops,
185 struct ceph_snap_context *snapc,
186 struct timespec *mtime,
190 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
191 struct ceph_file_layout *layout,
192 struct ceph_vino vino,
193 u64 offset, u64 *len, int op, int flags,
194 struct ceph_snap_context *snapc,
195 int do_sync, u32 truncate_seq,
197 struct timespec *mtime,
198 bool use_mempool, int num_reply,
201 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
203 kref_get(&req->r_kref);
205 extern void ceph_osdc_release_request(struct kref *kref);
206 static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
208 kref_put(&req->r_kref, ceph_osdc_release_request);
211 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
212 struct ceph_osd_request *req,
214 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
215 struct ceph_osd_request *req);
216 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
218 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
219 struct ceph_vino vino,
220 struct ceph_file_layout *layout,
222 u32 truncate_seq, u64 truncate_size,
223 struct page **pages, int nr_pages,
226 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
227 struct ceph_vino vino,
228 struct ceph_file_layout *layout,
229 struct ceph_snap_context *sc,
231 u32 truncate_seq, u64 truncate_size,
232 struct timespec *mtime,
233 struct page **pages, int nr_pages,
234 int flags, int do_sync, bool nofail);