1 #ifndef _FS_CEPH_OSD_CLIENT_H 2 #define _FS_CEPH_OSD_CLIENT_H 3 4 #include <linux/completion.h> 5 #include <linux/kref.h> 6 #include <linux/mempool.h> 7 #include <linux/rbtree.h> 8 9 #include <linux/ceph/types.h> 10 #include <linux/ceph/osdmap.h> 11 #include <linux/ceph/messenger.h> 12 #include <linux/ceph/msgpool.h> 13 #include <linux/ceph/auth.h> 14 #include <linux/ceph/pagelist.h> 15 16 struct ceph_msg; 17 struct ceph_snap_context; 18 struct ceph_osd_request; 19 struct ceph_osd_client; 20 21 /* 22 * completion callback for async writepages 23 */ 24 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *); 25 typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool); 26 27 #define CEPH_HOMELESS_OSD -1 28 29 /* a given osd we're communicating with */ 30 struct ceph_osd { 31 atomic_t o_ref; 32 struct ceph_osd_client *o_osdc; 33 int o_osd; 34 int o_incarnation; 35 struct rb_node o_node; 36 struct ceph_connection o_con; 37 struct rb_root o_requests; 38 struct rb_root o_linger_requests; 39 struct list_head o_osd_lru; 40 struct ceph_auth_handshake o_auth; 41 unsigned long lru_ttl; 42 struct list_head o_keepalive_item; 43 struct mutex lock; 44 }; 45 46 #define CEPH_OSD_SLAB_OPS 2 47 #define CEPH_OSD_MAX_OPS 16 48 49 enum ceph_osd_data_type { 50 CEPH_OSD_DATA_TYPE_NONE = 0, 51 CEPH_OSD_DATA_TYPE_PAGES, 52 CEPH_OSD_DATA_TYPE_PAGELIST, 53 #ifdef CONFIG_BLOCK 54 CEPH_OSD_DATA_TYPE_BIO, 55 #endif /* CONFIG_BLOCK */ 56 }; 57 58 struct ceph_osd_data { 59 enum ceph_osd_data_type type; 60 union { 61 struct { 62 struct page **pages; 63 u64 length; 64 u32 alignment; 65 bool pages_from_pool; 66 bool own_pages; 67 }; 68 struct ceph_pagelist *pagelist; 69 #ifdef CONFIG_BLOCK 70 struct { 71 struct bio *bio; /* list of bios */ 72 size_t bio_length; /* total in list */ 73 }; 74 #endif /* CONFIG_BLOCK */ 75 }; 76 }; 77 78 struct ceph_osd_req_op { 79 u16 op; /* CEPH_OSD_OP_* */ 80 u32 flags; /* CEPH_OSD_OP_FLAG_* */ 81 u32 indata_len; /* request */ 82 u32 outdata_len; /* reply */ 83 s32 rval; 84 85 union { 86 struct ceph_osd_data raw_data_in; 87 struct { 88 u64 offset, length; 89 u64 truncate_size; 90 u32 truncate_seq; 91 struct ceph_osd_data osd_data; 92 } extent; 93 struct { 94 u32 name_len; 95 u32 value_len; 96 __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */ 97 __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */ 98 struct ceph_osd_data osd_data; 99 } xattr; 100 struct { 101 const char *class_name; 102 const char *method_name; 103 struct ceph_osd_data request_info; 104 struct ceph_osd_data request_data; 105 struct ceph_osd_data response_data; 106 __u8 class_len; 107 __u8 method_len; 108 u32 indata_len; 109 } cls; 110 struct { 111 u64 cookie; 112 __u8 op; /* CEPH_OSD_WATCH_OP_ */ 113 u32 gen; 114 } watch; 115 struct { 116 struct ceph_osd_data request_data; 117 } notify_ack; 118 struct { 119 u64 cookie; 120 struct ceph_osd_data request_data; 121 struct ceph_osd_data response_data; 122 } notify; 123 struct { 124 u64 expected_object_size; 125 u64 expected_write_size; 126 } alloc_hint; 127 }; 128 }; 129 130 struct ceph_osd_request_target { 131 struct ceph_object_id base_oid; 132 struct ceph_object_locator base_oloc; 133 struct ceph_object_id target_oid; 134 struct ceph_object_locator target_oloc; 135 136 struct ceph_pg pgid; 137 u32 pg_num; 138 u32 pg_num_mask; 139 struct ceph_osds acting; 140 struct ceph_osds up; 141 int size; 142 int min_size; 143 bool sort_bitwise; 144 145 unsigned int flags; /* CEPH_OSD_FLAG_* */ 146 bool paused; 147 148 int osd; 149 }; 150 151 /* an in-flight request */ 152 struct ceph_osd_request { 153 u64 r_tid; /* unique for this client */ 154 struct rb_node r_node; 155 struct rb_node r_mc_node; /* map check */ 156 struct ceph_osd *r_osd; 157 158 struct ceph_osd_request_target r_t; 159 #define r_base_oid r_t.base_oid 160 #define r_base_oloc r_t.base_oloc 161 #define r_flags r_t.flags 162 163 struct ceph_msg *r_request, *r_reply; 164 u32 r_sent; /* >0 if r_request is sending/sent */ 165 166 /* request osd ops array */ 167 unsigned int r_num_ops; 168 169 int r_result; 170 bool r_got_reply; 171 172 struct ceph_osd_client *r_osdc; 173 struct kref r_kref; 174 bool r_mempool; 175 struct completion r_completion; 176 struct completion r_safe_completion; /* fsync waiter */ 177 ceph_osdc_callback_t r_callback; 178 ceph_osdc_unsafe_callback_t r_unsafe_callback; 179 struct list_head r_unsafe_item; 180 181 struct inode *r_inode; /* for use by callbacks */ 182 void *r_priv; /* ditto */ 183 184 /* set by submitter */ 185 u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */ 186 struct ceph_snap_context *r_snapc; /* for writes */ 187 struct timespec r_mtime; /* ditto */ 188 u64 r_data_offset; /* ditto */ 189 bool r_linger; /* don't resend on failure */ 190 191 /* internal */ 192 unsigned long r_stamp; /* jiffies, send or check time */ 193 int r_attempts; 194 struct ceph_eversion r_replay_version; /* aka reassert_version */ 195 u32 r_last_force_resend; 196 u32 r_map_dne_bound; 197 198 struct ceph_osd_req_op r_ops[]; 199 }; 200 201 struct ceph_request_redirect { 202 struct ceph_object_locator oloc; 203 }; 204 205 typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie, 206 u64 notifier_id, void *data, size_t data_len); 207 typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err); 208 209 struct ceph_osd_linger_request { 210 struct ceph_osd_client *osdc; 211 u64 linger_id; 212 bool committed; 213 bool is_watch; /* watch or notify */ 214 215 struct ceph_osd *osd; 216 struct ceph_osd_request *reg_req; 217 struct ceph_osd_request *ping_req; 218 unsigned long ping_sent; 219 unsigned long watch_valid_thru; 220 struct list_head pending_lworks; 221 222 struct ceph_osd_request_target t; 223 u32 last_force_resend; 224 u32 map_dne_bound; 225 226 struct timespec mtime; 227 228 struct kref kref; 229 struct mutex lock; 230 struct rb_node node; /* osd */ 231 struct rb_node osdc_node; /* osdc */ 232 struct rb_node mc_node; /* map check */ 233 struct list_head scan_item; 234 235 struct completion reg_commit_wait; 236 struct completion notify_finish_wait; 237 int reg_commit_error; 238 int notify_finish_error; 239 int last_error; 240 241 u32 register_gen; 242 u64 notify_id; 243 244 rados_watchcb2_t wcb; 245 rados_watcherrcb_t errcb; 246 void *data; 247 248 struct page ***preply_pages; 249 size_t *preply_len; 250 }; 251 252 struct ceph_osd_client { 253 struct ceph_client *client; 254 255 struct ceph_osdmap *osdmap; /* current map */ 256 struct rw_semaphore lock; 257 258 struct rb_root osds; /* osds */ 259 struct list_head osd_lru; /* idle osds */ 260 spinlock_t osd_lru_lock; 261 struct ceph_osd homeless_osd; 262 atomic64_t last_tid; /* tid of last request */ 263 u64 last_linger_id; 264 struct rb_root linger_requests; /* lingering requests */ 265 struct rb_root map_checks; 266 struct rb_root linger_map_checks; 267 atomic_t num_requests; 268 atomic_t num_homeless; 269 struct delayed_work timeout_work; 270 struct delayed_work osds_timeout_work; 271 #ifdef CONFIG_DEBUG_FS 272 struct dentry *debugfs_file; 273 #endif 274 275 mempool_t *req_mempool; 276 277 struct ceph_msgpool msgpool_op; 278 struct ceph_msgpool msgpool_op_reply; 279 280 struct workqueue_struct *notify_wq; 281 }; 282 283 static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag) 284 { 285 return osdc->osdmap->flags & flag; 286 } 287 288 extern int ceph_osdc_setup(void); 289 extern void ceph_osdc_cleanup(void); 290 291 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 292 struct ceph_client *client); 293 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 294 295 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, 296 struct ceph_msg *msg); 297 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 298 struct ceph_msg *msg); 299 300 extern void osd_req_op_init(struct ceph_osd_request *osd_req, 301 unsigned int which, u16 opcode, u32 flags); 302 303 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 304 unsigned int which, 305 struct page **pages, u64 length, 306 u32 alignment, bool pages_from_pool, 307 bool own_pages); 308 309 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 310 unsigned int which, u16 opcode, 311 u64 offset, u64 length, 312 u64 truncate_size, u32 truncate_seq); 313 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 314 unsigned int which, u64 length); 315 extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 316 unsigned int which, u64 offset_inc); 317 318 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 319 struct ceph_osd_request *osd_req, 320 unsigned int which); 321 322 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 323 unsigned int which, 324 struct page **pages, u64 length, 325 u32 alignment, bool pages_from_pool, 326 bool own_pages); 327 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 328 unsigned int which, 329 struct ceph_pagelist *pagelist); 330 #ifdef CONFIG_BLOCK 331 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, 332 unsigned int which, 333 struct bio *bio, size_t bio_length); 334 #endif /* CONFIG_BLOCK */ 335 336 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 337 unsigned int which, 338 struct ceph_pagelist *pagelist); 339 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 340 unsigned int which, 341 struct page **pages, u64 length, 342 u32 alignment, bool pages_from_pool, 343 bool own_pages); 344 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, 345 unsigned int which, 346 struct page **pages, u64 length, 347 u32 alignment, bool pages_from_pool, 348 bool own_pages); 349 350 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, 351 unsigned int which, u16 opcode, 352 const char *class, const char *method); 353 extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 354 u16 opcode, const char *name, const void *value, 355 size_t size, u8 cmp_op, u8 cmp_mode); 356 extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 357 unsigned int which, 358 u64 expected_object_size, 359 u64 expected_write_size); 360 361 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 362 struct ceph_snap_context *snapc, 363 unsigned int num_ops, 364 bool use_mempool, 365 gfp_t gfp_flags); 366 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp); 367 368 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 369 struct ceph_file_layout *layout, 370 struct ceph_vino vino, 371 u64 offset, u64 *len, 372 unsigned int which, int num_ops, 373 int opcode, int flags, 374 struct ceph_snap_context *snapc, 375 u32 truncate_seq, u64 truncate_size, 376 bool use_mempool); 377 378 extern void ceph_osdc_get_request(struct ceph_osd_request *req); 379 extern void ceph_osdc_put_request(struct ceph_osd_request *req); 380 381 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, 382 struct ceph_osd_request *req, 383 bool nofail); 384 extern void ceph_osdc_cancel_request(struct ceph_osd_request *req); 385 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 386 struct ceph_osd_request *req); 387 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 388 389 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 390 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc); 391 392 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, 393 struct ceph_vino vino, 394 struct ceph_file_layout *layout, 395 u64 off, u64 *plen, 396 u32 truncate_seq, u64 truncate_size, 397 struct page **pages, int nr_pages, 398 int page_align); 399 400 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, 401 struct ceph_vino vino, 402 struct ceph_file_layout *layout, 403 struct ceph_snap_context *sc, 404 u64 off, u64 len, 405 u32 truncate_seq, u64 truncate_size, 406 struct timespec *mtime, 407 struct page **pages, int nr_pages); 408 409 /* watch/notify */ 410 struct ceph_osd_linger_request * 411 ceph_osdc_watch(struct ceph_osd_client *osdc, 412 struct ceph_object_id *oid, 413 struct ceph_object_locator *oloc, 414 rados_watchcb2_t wcb, 415 rados_watcherrcb_t errcb, 416 void *data); 417 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 418 struct ceph_osd_linger_request *lreq); 419 420 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 421 struct ceph_object_id *oid, 422 struct ceph_object_locator *oloc, 423 u64 notify_id, 424 u64 cookie, 425 void *payload, 426 size_t payload_len); 427 int ceph_osdc_notify(struct ceph_osd_client *osdc, 428 struct ceph_object_id *oid, 429 struct ceph_object_locator *oloc, 430 void *payload, 431 size_t payload_len, 432 u32 timeout, 433 struct page ***preply_pages, 434 size_t *preply_len); 435 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 436 struct ceph_osd_linger_request *lreq); 437 #endif 438 439