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 struct ceph_authorizer; 20 21 /* 22 * completion callback for async writepages 23 */ 24 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *, 25 struct ceph_msg *); 26 typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool); 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 list_head o_requests; 37 struct list_head o_linger_requests; 38 struct list_head o_osd_lru; 39 struct ceph_auth_handshake o_auth; 40 unsigned long lru_ttl; 41 int o_marked_for_keepalive; 42 struct list_head o_keepalive_item; 43 }; 44 45 46 #define CEPH_OSD_MAX_OP 3 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 payload_len; 81 union { 82 struct ceph_osd_data raw_data_in; 83 struct { 84 u64 offset, length; 85 u64 truncate_size; 86 u32 truncate_seq; 87 struct ceph_osd_data osd_data; 88 } extent; 89 struct { 90 const char *class_name; 91 const char *method_name; 92 struct ceph_osd_data request_info; 93 struct ceph_osd_data request_data; 94 struct ceph_osd_data response_data; 95 __u8 class_len; 96 __u8 method_len; 97 __u8 argc; 98 } cls; 99 struct { 100 u64 cookie; 101 u64 ver; 102 u32 prot_ver; 103 u32 timeout; 104 __u8 flag; 105 } watch; 106 struct { 107 u64 expected_object_size; 108 u64 expected_write_size; 109 } alloc_hint; 110 }; 111 }; 112 113 /* 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]; 124 int r_num_pg_osds; 125 126 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 */ 129 130 /* request osd ops array */ 131 unsigned int r_num_ops; 132 struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP]; 133 134 /* 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 bool r_paused; 141 struct ceph_eversion *r_request_reassert_version; 142 143 int r_result; 144 int r_reply_op_len[CEPH_OSD_MAX_OP]; 145 s32 r_reply_op_result[CEPH_OSD_MAX_OP]; 146 int r_got_reply; 147 int r_linger; 148 149 struct ceph_osd_client *r_osdc; 150 struct kref r_kref; 151 bool r_mempool; 152 struct completion r_completion, r_safe_completion; 153 ceph_osdc_callback_t r_callback; 154 ceph_osdc_unsafe_callback_t r_unsafe_callback; 155 struct ceph_eversion r_reassert_version; 156 struct list_head r_unsafe_item; 157 158 struct inode *r_inode; /* for use by callbacks */ 159 void *r_priv; /* ditto */ 160 161 struct ceph_object_locator r_base_oloc; 162 struct ceph_object_id r_base_oid; 163 struct ceph_object_locator r_target_oloc; 164 struct ceph_object_id r_target_oid; 165 166 u64 r_snapid; 167 unsigned long r_stamp; /* send OR check time */ 168 169 struct ceph_snap_context *r_snapc; /* snap context for writes */ 170 }; 171 172 struct ceph_request_redirect { 173 struct ceph_object_locator oloc; 174 }; 175 176 struct ceph_osd_event { 177 u64 cookie; 178 int one_shot; 179 struct ceph_osd_client *osdc; 180 void (*cb)(u64, u64, u8, void *); 181 void *data; 182 struct rb_node node; 183 struct list_head osd_node; 184 struct kref kref; 185 }; 186 187 struct ceph_osd_event_work { 188 struct work_struct work; 189 struct ceph_osd_event *event; 190 u64 ver; 191 u64 notify_id; 192 u8 opcode; 193 }; 194 195 struct ceph_osd_client { 196 struct ceph_client *client; 197 198 struct ceph_osdmap *osdmap; /* current map */ 199 struct rw_semaphore map_sem; 200 struct completion map_waiters; 201 u64 last_requested_map; 202 203 struct mutex request_mutex; 204 struct rb_root osds; /* osds */ 205 struct list_head osd_lru; /* idle osds */ 206 u64 timeout_tid; /* tid of timeout triggering rq */ 207 u64 last_tid; /* tid of last request */ 208 struct rb_root requests; /* pending requests */ 209 struct list_head req_lru; /* in-flight lru */ 210 struct list_head req_unsent; /* unsent/need-resend queue */ 211 struct list_head req_notarget; /* map to no osd */ 212 struct list_head req_linger; /* lingering requests */ 213 int num_requests; 214 struct delayed_work timeout_work; 215 struct delayed_work osds_timeout_work; 216 #ifdef CONFIG_DEBUG_FS 217 struct dentry *debugfs_file; 218 #endif 219 220 mempool_t *req_mempool; 221 222 struct ceph_msgpool msgpool_op; 223 struct ceph_msgpool msgpool_op_reply; 224 225 spinlock_t event_lock; 226 struct rb_root event_tree; 227 u64 event_count; 228 229 struct workqueue_struct *notify_wq; 230 }; 231 232 extern int ceph_osdc_setup(void); 233 extern void ceph_osdc_cleanup(void); 234 235 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 236 struct ceph_client *client); 237 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 238 239 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, 240 struct ceph_msg *msg); 241 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 242 struct ceph_msg *msg); 243 244 extern void osd_req_op_init(struct ceph_osd_request *osd_req, 245 unsigned int which, u16 opcode); 246 247 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 248 unsigned int which, 249 struct page **pages, u64 length, 250 u32 alignment, bool pages_from_pool, 251 bool own_pages); 252 253 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 254 unsigned int which, u16 opcode, 255 u64 offset, u64 length, 256 u64 truncate_size, u32 truncate_seq); 257 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 258 unsigned int which, u64 length); 259 260 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 261 struct ceph_osd_request *osd_req, 262 unsigned int which); 263 extern struct ceph_osd_data *osd_req_op_cls_response_data( 264 struct ceph_osd_request *osd_req, 265 unsigned int which); 266 267 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 268 unsigned int which, 269 struct page **pages, u64 length, 270 u32 alignment, bool pages_from_pool, 271 bool own_pages); 272 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 273 unsigned int which, 274 struct ceph_pagelist *pagelist); 275 #ifdef CONFIG_BLOCK 276 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, 277 unsigned int which, 278 struct bio *bio, size_t bio_length); 279 #endif /* CONFIG_BLOCK */ 280 281 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 282 unsigned int which, 283 struct ceph_pagelist *pagelist); 284 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 285 unsigned int which, 286 struct page **pages, u64 length, 287 u32 alignment, bool pages_from_pool, 288 bool own_pages); 289 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, 290 unsigned int which, 291 struct page **pages, u64 length, 292 u32 alignment, bool pages_from_pool, 293 bool own_pages); 294 295 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, 296 unsigned int which, u16 opcode, 297 const char *class, const char *method); 298 extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 299 unsigned int which, u16 opcode, 300 u64 cookie, u64 version, int flag); 301 extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 302 unsigned int which, 303 u64 expected_object_size, 304 u64 expected_write_size); 305 306 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 307 struct ceph_snap_context *snapc, 308 unsigned int num_ops, 309 bool use_mempool, 310 gfp_t gfp_flags); 311 312 extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 313 struct ceph_snap_context *snapc, 314 u64 snap_id, 315 struct timespec *mtime); 316 317 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 318 struct ceph_file_layout *layout, 319 struct ceph_vino vino, 320 u64 offset, u64 *len, 321 int num_ops, int opcode, int flags, 322 struct ceph_snap_context *snapc, 323 u32 truncate_seq, u64 truncate_size, 324 bool use_mempool); 325 326 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 327 struct ceph_osd_request *req); 328 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, 329 struct ceph_osd_request *req); 330 331 static inline void ceph_osdc_get_request(struct ceph_osd_request *req) 332 { 333 kref_get(&req->r_kref); 334 } 335 extern void ceph_osdc_release_request(struct kref *kref); 336 static inline void ceph_osdc_put_request(struct ceph_osd_request *req) 337 { 338 kref_put(&req->r_kref, ceph_osdc_release_request); 339 } 340 341 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, 342 struct ceph_osd_request *req, 343 bool nofail); 344 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 345 struct ceph_osd_request *req); 346 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 347 348 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 349 350 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, 351 struct ceph_vino vino, 352 struct ceph_file_layout *layout, 353 u64 off, u64 *plen, 354 u32 truncate_seq, u64 truncate_size, 355 struct page **pages, int nr_pages, 356 int page_align); 357 358 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, 359 struct ceph_vino vino, 360 struct ceph_file_layout *layout, 361 struct ceph_snap_context *sc, 362 u64 off, u64 len, 363 u32 truncate_seq, u64 truncate_size, 364 struct timespec *mtime, 365 struct page **pages, int nr_pages); 366 367 /* watch/notify events */ 368 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc, 369 void (*event_cb)(u64, u64, u8, void *), 370 void *data, struct ceph_osd_event **pevent); 371 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event); 372 extern void ceph_osdc_put_event(struct ceph_osd_event *event); 373 #endif 374 375