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;
97 struct ceph_osd_data *response_data;
112 /* an in-flight request */
113 struct ceph_osd_request {
114 u64 r_tid; /* unique for this client */
115 struct rb_node r_node;
116 struct list_head r_req_lru_item;
117 struct list_head r_osd_item;
118 struct list_head r_linger_item;
119 struct list_head r_linger_osd;
120 struct ceph_osd *r_osd;
121 struct ceph_pg r_pgid;
122 int r_pg_osds[CEPH_PG_MAX_SIZE];
125 struct ceph_msg *r_request, *r_reply;
126 int r_flags; /* any additional flags for the osd */
127 u32 r_sent; /* >0 if r_request is sending/sent */
129 /* request osd ops array */
130 unsigned int r_num_ops;
131 struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP];
133 /* these are updated on each send */
134 __le32 *r_request_osdmap_epoch;
135 __le32 *r_request_flags;
136 __le64 *r_request_pool;
137 void *r_request_pgid;
138 __le32 *r_request_attempts;
139 struct ceph_eversion *r_request_reassert_version;
142 int r_reply_op_len[CEPH_OSD_MAX_OP];
143 s32 r_reply_op_result[CEPH_OSD_MAX_OP];
148 struct ceph_osd_client *r_osdc;
151 struct completion r_completion, r_safe_completion;
152 ceph_osdc_callback_t r_callback, r_safe_callback;
153 struct ceph_eversion r_reassert_version;
154 struct list_head r_unsafe_item;
156 struct inode *r_inode; /* for use by callbacks */
157 void *r_priv; /* ditto */
159 char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
162 unsigned long r_stamp; /* send OR check time */
164 struct ceph_file_layout r_file_layout;
165 struct ceph_snap_context *r_snapc; /* snap context for writes */
167 struct ceph_osd_data r_data_in;
168 struct ceph_osd_data r_data_out;
171 struct ceph_osd_event {
174 struct ceph_osd_client *osdc;
175 void (*cb)(u64, u64, u8, void *);
178 struct list_head osd_node;
182 struct ceph_osd_event_work {
183 struct work_struct work;
184 struct ceph_osd_event *event;
190 struct ceph_osd_client {
191 struct ceph_client *client;
193 struct ceph_osdmap *osdmap; /* current map */
194 struct rw_semaphore map_sem;
195 struct completion map_waiters;
196 u64 last_requested_map;
198 struct mutex request_mutex;
199 struct rb_root osds; /* osds */
200 struct list_head osd_lru; /* idle osds */
201 u64 timeout_tid; /* tid of timeout triggering rq */
202 u64 last_tid; /* tid of last request */
203 struct rb_root requests; /* pending requests */
204 struct list_head req_lru; /* in-flight lru */
205 struct list_head req_unsent; /* unsent/need-resend queue */
206 struct list_head req_notarget; /* map to no osd */
207 struct list_head req_linger; /* lingering requests */
209 struct delayed_work timeout_work;
210 struct delayed_work osds_timeout_work;
211 #ifdef CONFIG_DEBUG_FS
212 struct dentry *debugfs_file;
215 mempool_t *req_mempool;
217 struct ceph_msgpool msgpool_op;
218 struct ceph_msgpool msgpool_op_reply;
220 spinlock_t event_lock;
221 struct rb_root event_tree;
224 struct workqueue_struct *notify_wq;
227 extern int ceph_osdc_init(struct ceph_osd_client *osdc,
228 struct ceph_client *client);
229 extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
231 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
232 struct ceph_msg *msg);
233 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
234 struct ceph_msg *msg);
236 extern void osd_req_op_init(struct ceph_osd_req_op *op, u16 opcode);
237 extern void osd_req_op_extent_init(struct ceph_osd_req_op *op, u16 opcode,
238 u64 offset, u64 length,
239 u64 truncate_size, u32 truncate_seq);
240 extern void osd_req_op_extent_update(struct ceph_osd_req_op *op, u64 length);
241 extern void osd_req_op_extent_osd_data(struct ceph_osd_req_op *op,
242 struct ceph_osd_data *osd_data);
243 extern void osd_req_op_cls_init(struct ceph_osd_req_op *op, u16 opcode,
244 const char *class, const char *method,
245 const void *request_data,
246 size_t request_data_size);
247 extern void osd_req_op_cls_response_data(struct ceph_osd_req_op *op,
248 struct ceph_osd_data *response_data);
249 extern void osd_req_op_watch_init(struct ceph_osd_req_op *op, u16 opcode,
250 u64 cookie, u64 version, int flag);
252 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
253 struct ceph_snap_context *snapc,
254 unsigned int num_ops,
258 extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
259 struct ceph_snap_context *snapc,
261 struct timespec *mtime);
263 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
264 struct ceph_file_layout *layout,
265 struct ceph_vino vino,
266 u64 offset, u64 *len,
267 int num_ops, int opcode, int flags,
268 struct ceph_snap_context *snapc,
269 u32 truncate_seq, u64 truncate_size,
272 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
273 struct ceph_osd_request *req);
274 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
275 struct ceph_osd_request *req);
277 static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
279 kref_get(&req->r_kref);
281 extern void ceph_osdc_release_request(struct kref *kref);
282 static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
284 kref_put(&req->r_kref, ceph_osdc_release_request);
287 extern void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
288 struct page **pages, u64 length,
289 u32 alignment, bool pages_from_pool,
291 extern void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
292 struct ceph_pagelist *pagelist);
294 extern void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
295 struct bio *bio, size_t bio_length);
296 #endif /* CONFIG_BLOCK */
298 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
299 struct ceph_osd_request *req,
301 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
302 struct ceph_osd_request *req);
303 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
305 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
306 struct ceph_vino vino,
307 struct ceph_file_layout *layout,
309 u32 truncate_seq, u64 truncate_size,
310 struct page **pages, int nr_pages,
313 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
314 struct ceph_vino vino,
315 struct ceph_file_layout *layout,
316 struct ceph_snap_context *sc,
318 u32 truncate_seq, u64 truncate_size,
319 struct timespec *mtime,
320 struct page **pages, int nr_pages);
322 /* watch/notify events */
323 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
324 void (*event_cb)(u64, u64, u8, void *),
325 void *data, struct ceph_osd_event **pevent);
326 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
327 extern void ceph_osdc_put_event(struct ceph_osd_event *event);