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 #include <linux/refcount.h> 9 10 #include <linux/ceph/types.h> 11 #include <linux/ceph/osdmap.h> 12 #include <linux/ceph/messenger.h> 13 #include <linux/ceph/msgpool.h> 14 #include <linux/ceph/auth.h> 15 #include <linux/ceph/pagelist.h> 16 17 struct ceph_msg; 18 struct ceph_snap_context; 19 struct ceph_osd_request; 20 struct ceph_osd_client; 21 22 /* 23 * completion callback for async writepages 24 */ 25 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *); 26 27 #define CEPH_HOMELESS_OSD -1 28 29 /* a given osd we're communicating with */ 30 struct ceph_osd { 31 refcount_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 struct ceph_osd_data response_data; 125 } list_watchers; 126 struct { 127 u64 expected_object_size; 128 u64 expected_write_size; 129 } alloc_hint; 130 }; 131 }; 132 133 struct ceph_osd_request_target { 134 struct ceph_object_id base_oid; 135 struct ceph_object_locator base_oloc; 136 struct ceph_object_id target_oid; 137 struct ceph_object_locator target_oloc; 138 139 struct ceph_pg pgid; 140 u32 pg_num; 141 u32 pg_num_mask; 142 struct ceph_osds acting; 143 struct ceph_osds up; 144 int size; 145 int min_size; 146 bool sort_bitwise; 147 148 unsigned int flags; /* CEPH_OSD_FLAG_* */ 149 bool paused; 150 151 int osd; 152 }; 153 154 /* an in-flight request */ 155 struct ceph_osd_request { 156 u64 r_tid; /* unique for this client */ 157 struct rb_node r_node; 158 struct rb_node r_mc_node; /* map check */ 159 struct ceph_osd *r_osd; 160 161 struct ceph_osd_request_target r_t; 162 #define r_base_oid r_t.base_oid 163 #define r_base_oloc r_t.base_oloc 164 #define r_flags r_t.flags 165 166 struct ceph_msg *r_request, *r_reply; 167 u32 r_sent; /* >0 if r_request is sending/sent */ 168 169 /* request osd ops array */ 170 unsigned int r_num_ops; 171 172 int r_result; 173 174 struct ceph_osd_client *r_osdc; 175 struct kref r_kref; 176 bool r_mempool; 177 struct completion r_completion; /* private to osd_client.c */ 178 ceph_osdc_callback_t r_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 bool r_abort_on_full; /* return ENOSPC when full */ 191 192 /* internal */ 193 unsigned long r_stamp; /* jiffies, send or check time */ 194 unsigned long r_start_stamp; /* jiffies */ 195 int r_attempts; 196 u32 r_last_force_resend; 197 u32 r_map_dne_bound; 198 199 struct ceph_osd_req_op r_ops[]; 200 }; 201 202 struct ceph_request_redirect { 203 struct ceph_object_locator oloc; 204 }; 205 206 typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie, 207 u64 notifier_id, void *data, size_t data_len); 208 typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err); 209 210 struct ceph_osd_linger_request { 211 struct ceph_osd_client *osdc; 212 u64 linger_id; 213 bool committed; 214 bool is_watch; /* watch or notify */ 215 216 struct ceph_osd *osd; 217 struct ceph_osd_request *reg_req; 218 struct ceph_osd_request *ping_req; 219 unsigned long ping_sent; 220 unsigned long watch_valid_thru; 221 struct list_head pending_lworks; 222 223 struct ceph_osd_request_target t; 224 u32 last_force_resend; 225 u32 map_dne_bound; 226 227 struct timespec mtime; 228 229 struct kref kref; 230 struct mutex lock; 231 struct rb_node node; /* osd */ 232 struct rb_node osdc_node; /* osdc */ 233 struct rb_node mc_node; /* map check */ 234 struct list_head scan_item; 235 236 struct completion reg_commit_wait; 237 struct completion notify_finish_wait; 238 int reg_commit_error; 239 int notify_finish_error; 240 int last_error; 241 242 u32 register_gen; 243 u64 notify_id; 244 245 rados_watchcb2_t wcb; 246 rados_watcherrcb_t errcb; 247 void *data; 248 249 struct page ***preply_pages; 250 size_t *preply_len; 251 }; 252 253 struct ceph_watch_item { 254 struct ceph_entity_name name; 255 u64 cookie; 256 struct ceph_entity_addr addr; 257 }; 258 259 #define CEPH_LINGER_ID_START 0xffff000000000000ULL 260 261 struct ceph_osd_client { 262 struct ceph_client *client; 263 264 struct ceph_osdmap *osdmap; /* current map */ 265 struct rw_semaphore lock; 266 267 struct rb_root osds; /* osds */ 268 struct list_head osd_lru; /* idle osds */ 269 spinlock_t osd_lru_lock; 270 u32 epoch_barrier; 271 struct ceph_osd homeless_osd; 272 atomic64_t last_tid; /* tid of last request */ 273 u64 last_linger_id; 274 struct rb_root linger_requests; /* lingering requests */ 275 struct rb_root map_checks; 276 struct rb_root linger_map_checks; 277 atomic_t num_requests; 278 atomic_t num_homeless; 279 struct delayed_work timeout_work; 280 struct delayed_work osds_timeout_work; 281 #ifdef CONFIG_DEBUG_FS 282 struct dentry *debugfs_file; 283 #endif 284 285 mempool_t *req_mempool; 286 287 struct ceph_msgpool msgpool_op; 288 struct ceph_msgpool msgpool_op_reply; 289 290 struct workqueue_struct *notify_wq; 291 }; 292 293 static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag) 294 { 295 return osdc->osdmap->flags & flag; 296 } 297 298 extern int ceph_osdc_setup(void); 299 extern void ceph_osdc_cleanup(void); 300 301 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 302 struct ceph_client *client); 303 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 304 305 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, 306 struct ceph_msg *msg); 307 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 308 struct ceph_msg *msg); 309 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb); 310 311 extern void osd_req_op_init(struct ceph_osd_request *osd_req, 312 unsigned int which, u16 opcode, u32 flags); 313 314 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 315 unsigned int which, 316 struct page **pages, u64 length, 317 u32 alignment, bool pages_from_pool, 318 bool own_pages); 319 320 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 321 unsigned int which, u16 opcode, 322 u64 offset, u64 length, 323 u64 truncate_size, u32 truncate_seq); 324 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 325 unsigned int which, u64 length); 326 extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 327 unsigned int which, u64 offset_inc); 328 329 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 330 struct ceph_osd_request *osd_req, 331 unsigned int which); 332 333 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 334 unsigned int which, 335 struct page **pages, u64 length, 336 u32 alignment, bool pages_from_pool, 337 bool own_pages); 338 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 339 unsigned int which, 340 struct ceph_pagelist *pagelist); 341 #ifdef CONFIG_BLOCK 342 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, 343 unsigned int which, 344 struct bio *bio, size_t bio_length); 345 #endif /* CONFIG_BLOCK */ 346 347 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 348 unsigned int which, 349 struct ceph_pagelist *pagelist); 350 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 351 unsigned int which, 352 struct page **pages, u64 length, 353 u32 alignment, bool pages_from_pool, 354 bool own_pages); 355 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, 356 unsigned int which, 357 struct page **pages, u64 length, 358 u32 alignment, bool pages_from_pool, 359 bool own_pages); 360 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, 361 unsigned int which, u16 opcode, 362 const char *class, const char *method); 363 extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 364 u16 opcode, const char *name, const void *value, 365 size_t size, u8 cmp_op, u8 cmp_mode); 366 extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 367 unsigned int which, 368 u64 expected_object_size, 369 u64 expected_write_size); 370 371 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 372 struct ceph_snap_context *snapc, 373 unsigned int num_ops, 374 bool use_mempool, 375 gfp_t gfp_flags); 376 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp); 377 378 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 379 struct ceph_file_layout *layout, 380 struct ceph_vino vino, 381 u64 offset, u64 *len, 382 unsigned int which, int num_ops, 383 int opcode, int flags, 384 struct ceph_snap_context *snapc, 385 u32 truncate_seq, u64 truncate_size, 386 bool use_mempool); 387 388 extern void ceph_osdc_get_request(struct ceph_osd_request *req); 389 extern void ceph_osdc_put_request(struct ceph_osd_request *req); 390 391 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, 392 struct ceph_osd_request *req, 393 bool nofail); 394 extern void ceph_osdc_cancel_request(struct ceph_osd_request *req); 395 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 396 struct ceph_osd_request *req); 397 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 398 399 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 400 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc); 401 402 int ceph_osdc_call(struct ceph_osd_client *osdc, 403 struct ceph_object_id *oid, 404 struct ceph_object_locator *oloc, 405 const char *class, const char *method, 406 unsigned int flags, 407 struct page *req_page, size_t req_len, 408 struct page *resp_page, size_t *resp_len); 409 410 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, 411 struct ceph_vino vino, 412 struct ceph_file_layout *layout, 413 u64 off, u64 *plen, 414 u32 truncate_seq, u64 truncate_size, 415 struct page **pages, int nr_pages, 416 int page_align); 417 418 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, 419 struct ceph_vino vino, 420 struct ceph_file_layout *layout, 421 struct ceph_snap_context *sc, 422 u64 off, u64 len, 423 u32 truncate_seq, u64 truncate_size, 424 struct timespec *mtime, 425 struct page **pages, int nr_pages); 426 427 /* watch/notify */ 428 struct ceph_osd_linger_request * 429 ceph_osdc_watch(struct ceph_osd_client *osdc, 430 struct ceph_object_id *oid, 431 struct ceph_object_locator *oloc, 432 rados_watchcb2_t wcb, 433 rados_watcherrcb_t errcb, 434 void *data); 435 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 436 struct ceph_osd_linger_request *lreq); 437 438 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 439 struct ceph_object_id *oid, 440 struct ceph_object_locator *oloc, 441 u64 notify_id, 442 u64 cookie, 443 void *payload, 444 size_t payload_len); 445 int ceph_osdc_notify(struct ceph_osd_client *osdc, 446 struct ceph_object_id *oid, 447 struct ceph_object_locator *oloc, 448 void *payload, 449 size_t payload_len, 450 u32 timeout, 451 struct page ***preply_pages, 452 size_t *preply_len); 453 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 454 struct ceph_osd_linger_request *lreq); 455 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 456 struct ceph_object_id *oid, 457 struct ceph_object_locator *oloc, 458 struct ceph_watch_item **watchers, 459 u32 *num_watchers); 460 #endif 461 462