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