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>
9 #include <linux/ceph/types.h>
10 #include <linux/ceph/osdmap.h>
11 #include <linux/ceph/messenger.h>
12 #include <linux/ceph/auth.h>
13 #include <linux/ceph/pagelist.h>
16 * Maximum object name size
17 * (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
19 #define MAX_OBJ_NAME_SIZE 100
22 struct ceph_snap_context;
23 struct ceph_osd_request;
24 struct ceph_osd_client;
25 struct ceph_authorizer;
28 * completion callback for async writepages
30 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
33 /* a given osd we're communicating with */
36 struct ceph_osd_client *o_osdc;
39 struct rb_node o_node;
40 struct ceph_connection o_con;
41 struct list_head o_requests;
42 struct list_head o_linger_requests;
43 struct list_head o_osd_lru;
44 struct ceph_auth_handshake o_auth;
45 unsigned long lru_ttl;
46 int o_marked_for_keepalive;
47 struct list_head o_keepalive_item;
51 #define CEPH_OSD_MAX_OP 2
53 enum ceph_osd_data_type {
54 CEPH_OSD_DATA_TYPE_NONE,
55 CEPH_OSD_DATA_TYPE_PAGES,
56 CEPH_OSD_DATA_TYPE_PAGELIST,
58 CEPH_OSD_DATA_TYPE_BIO,
59 #endif /* CONFIG_BLOCK */
62 struct ceph_osd_data {
63 enum ceph_osd_data_type type;
72 struct ceph_pagelist *pagelist;
75 struct bio *bio; /* list of bios */
76 size_t bio_length; /* total in list */
78 #endif /* CONFIG_BLOCK */
82 struct ceph_osd_req_op {
83 u16 op; /* CEPH_OSD_OP_* */
90 struct ceph_osd_data *osd_data;
93 const char *class_name;
94 const char *method_name;
95 const void *request_data;
96 struct ceph_osd_data *request_info;
97 struct ceph_osd_data *response_data;
113 /* an in-flight request */
114 struct ceph_osd_request {
115 u64 r_tid; /* unique for this client */
116 struct rb_node r_node;
117 struct list_head r_req_lru_item;
118 struct list_head r_osd_item;
119 struct list_head r_linger_item;
120 struct list_head r_linger_osd;
121 struct ceph_osd *r_osd;
122 struct ceph_pg r_pgid;
123 int r_pg_osds[CEPH_PG_MAX_SIZE];
126 struct ceph_msg *r_request, *r_reply;
127 int r_flags; /* any additional flags for the osd */
128 u32 r_sent; /* >0 if r_request is sending/sent */
130 /* request osd ops array */
131 unsigned int r_num_ops;
132 struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP];
134 /* these are updated on each send */
135 __le32 *r_request_osdmap_epoch;
136 __le32 *r_request_flags;
137 __le64 *r_request_pool;
138 void *r_request_pgid;
139 __le32 *r_request_attempts;
140 struct ceph_eversion *r_request_reassert_version;
143 int r_reply_op_len[CEPH_OSD_MAX_OP];
144 s32 r_reply_op_result[CEPH_OSD_MAX_OP];
149 struct ceph_osd_client *r_osdc;
152 struct completion r_completion, r_safe_completion;
153 ceph_osdc_callback_t r_callback, r_safe_callback;
154 struct ceph_eversion r_reassert_version;
155 struct list_head r_unsafe_item;
157 struct inode *r_inode; /* for use by callbacks */
158 void *r_priv; /* ditto */
160 char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
163 unsigned long r_stamp; /* send OR check time */
165 struct ceph_file_layout r_file_layout;
166 struct ceph_snap_context *r_snapc; /* snap context for writes */
168 struct ceph_osd_data r_data_in;
169 struct ceph_osd_data r_data_out;
172 struct ceph_osd_event {
175 struct ceph_osd_client *osdc;
176 void (*cb)(u64, u64, u8, void *);
179 struct list_head osd_node;
183 struct ceph_osd_event_work {
184 struct work_struct work;
185 struct ceph_osd_event *event;
191 struct ceph_osd_client {
192 struct ceph_client *client;
194 struct ceph_osdmap *osdmap; /* current map */
195 struct rw_semaphore map_sem;
196 struct completion map_waiters;
197 u64 last_requested_map;
199 struct mutex request_mutex;
200 struct rb_root osds; /* osds */
201 struct list_head osd_lru; /* idle osds */
202 u64 timeout_tid; /* tid of timeout triggering rq */
203 u64 last_tid; /* tid of last request */
204 struct rb_root requests; /* pending requests */
205 struct list_head req_lru; /* in-flight lru */
206 struct list_head req_unsent; /* unsent/need-resend queue */
207 struct list_head req_notarget; /* map to no osd */
208 struct list_head req_linger; /* lingering requests */
210 struct delayed_work timeout_work;
211 struct delayed_work osds_timeout_work;
212 #ifdef CONFIG_DEBUG_FS
213 struct dentry *debugfs_file;
216 mempool_t *req_mempool;
218 struct ceph_msgpool msgpool_op;
219 struct ceph_msgpool msgpool_op_reply;
221 spinlock_t event_lock;
222 struct rb_root event_tree;
225 struct workqueue_struct *notify_wq;
228 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
229 struct ceph_client *client);
230 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
232 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
233 struct ceph_msg *msg);
234 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
235 struct ceph_msg *msg);
237 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
238 unsigned int which, u16 opcode,
239 u64 offset, u64 length,
240 u64 truncate_size, u32 truncate_seq);
241 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
242 unsigned int which, u64 length);
244 extern struct ceph_osd_data *osd_req_op_extent_osd_data(
245 struct ceph_osd_request *osd_req,
246 unsigned int which, bool write_request);
247 extern struct ceph_osd_data *osd_req_op_cls_response_data(
248 struct ceph_osd_request *osd_req,
251 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
252 unsigned int which, bool write_request,
253 struct page **pages, u64 length,
254 u32 alignment, bool pages_from_pool,
256 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
257 unsigned int which, bool write_request,
258 struct ceph_pagelist *pagelist);
260 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
261 unsigned int which, bool write_request,
262 struct bio *bio, size_t bio_length);
263 #endif /* CONFIG_BLOCK */
265 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
267 struct page **pages, u64 length,
268 u32 alignment, bool pages_from_pool,
271 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
272 unsigned int which, u16 opcode,
273 const char *class, const char *method,
274 const void *request_data,
275 size_t request_data_size);
276 extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
277 unsigned int which, u16 opcode,
278 u64 cookie, u64 version, int flag);
280 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
281 struct ceph_snap_context *snapc,
282 unsigned int num_ops,
286 extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
287 struct ceph_snap_context *snapc,
289 struct timespec *mtime);
291 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
292 struct ceph_file_layout *layout,
293 struct ceph_vino vino,
294 u64 offset, u64 *len,
295 int num_ops, int opcode, int flags,
296 struct ceph_snap_context *snapc,
297 u32 truncate_seq, u64 truncate_size,
300 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
301 struct ceph_osd_request *req);
302 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
303 struct ceph_osd_request *req);
305 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
307 kref_get(&req->r_kref);
309 extern void ceph_osdc_release_request(struct kref *kref);
310 static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
312 kref_put(&req->r_kref, ceph_osdc_release_request);
315 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
316 struct ceph_osd_request *req,
318 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
319 struct ceph_osd_request *req);
320 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
322 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
323 struct ceph_vino vino,
324 struct ceph_file_layout *layout,
326 u32 truncate_seq, u64 truncate_size,
327 struct page **pages, int nr_pages,
330 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
331 struct ceph_vino vino,
332 struct ceph_file_layout *layout,
333 struct ceph_snap_context *sc,
335 u32 truncate_seq, u64 truncate_size,
336 struct timespec *mtime,
337 struct page **pages, int nr_pages);
339 /* watch/notify events */
340 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
341 void (*event_cb)(u64, u64, u8, void *),
342 void *data, struct ceph_osd_event **pevent);
343 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
344 extern void ceph_osdc_put_event(struct ceph_osd_event *event);