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 struct ceph_msg *); 25 typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool); 26 27 /* a given osd we're communicating with */ 28 struct ceph_osd { 29 atomic_t o_ref; 30 struct ceph_osd_client *o_osdc; 31 int o_osd; 32 int o_incarnation; 33 struct rb_node o_node; 34 struct ceph_connection o_con; 35 struct list_head o_requests; 36 struct list_head o_linger_requests; 37 struct list_head o_osd_lru; 38 struct ceph_auth_handshake o_auth; 39 unsigned long lru_ttl; 40 int o_marked_for_keepalive; 41 struct list_head o_keepalive_item; 42 }; 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 __u8 argc; 108 } cls; 109 struct { 110 u64 cookie; 111 u64 ver; 112 u32 prot_ver; 113 u32 timeout; 114 __u8 flag; 115 } watch; 116 struct { 117 u64 expected_object_size; 118 u64 expected_write_size; 119 } alloc_hint; 120 }; 121 }; 122 123 /* an in-flight request */ 124 struct ceph_osd_request { 125 u64 r_tid; /* unique for this client */ 126 struct rb_node r_node; 127 struct list_head r_req_lru_item; 128 struct list_head r_osd_item; 129 struct list_head r_linger_item; 130 struct list_head r_linger_osd_item; 131 struct ceph_osd *r_osd; 132 struct ceph_pg r_pgid; 133 int r_pg_osds[CEPH_PG_MAX_SIZE]; 134 int r_num_pg_osds; 135 136 struct ceph_msg *r_request, *r_reply; 137 int r_flags; /* any additional flags for the osd */ 138 u32 r_sent; /* >0 if r_request is sending/sent */ 139 140 /* request osd ops array */ 141 unsigned int r_num_ops; 142 143 /* these are updated on each send */ 144 __le32 *r_request_osdmap_epoch; 145 __le32 *r_request_flags; 146 __le64 *r_request_pool; 147 void *r_request_pgid; 148 __le32 *r_request_attempts; 149 bool r_paused; 150 struct ceph_eversion *r_request_reassert_version; 151 152 int r_result; 153 int r_got_reply; 154 int r_linger; 155 156 struct ceph_osd_client *r_osdc; 157 struct kref r_kref; 158 bool r_mempool; 159 struct completion r_completion, r_safe_completion; 160 ceph_osdc_callback_t r_callback; 161 ceph_osdc_unsafe_callback_t r_unsafe_callback; 162 struct ceph_eversion r_reassert_version; 163 struct list_head r_unsafe_item; 164 165 struct inode *r_inode; /* for use by callbacks */ 166 void *r_priv; /* ditto */ 167 168 struct ceph_object_locator r_base_oloc; 169 struct ceph_object_id r_base_oid; 170 struct ceph_object_locator r_target_oloc; 171 struct ceph_object_id r_target_oid; 172 173 u64 r_snapid; 174 unsigned long r_stamp; /* send OR check time */ 175 176 struct ceph_snap_context *r_snapc; /* snap context for writes */ 177 178 struct ceph_osd_req_op r_ops[]; 179 }; 180 181 struct ceph_request_redirect { 182 struct ceph_object_locator oloc; 183 }; 184 185 struct ceph_osd_event { 186 u64 cookie; 187 int one_shot; 188 struct ceph_osd_client *osdc; 189 void (*cb)(u64, u64, u8, void *); 190 void *data; 191 struct rb_node node; 192 struct list_head osd_node; 193 struct kref kref; 194 }; 195 196 struct ceph_osd_event_work { 197 struct work_struct work; 198 struct ceph_osd_event *event; 199 u64 ver; 200 u64 notify_id; 201 u8 opcode; 202 }; 203 204 struct ceph_osd_client { 205 struct ceph_client *client; 206 207 struct ceph_osdmap *osdmap; /* current map */ 208 struct rw_semaphore map_sem; 209 struct completion map_waiters; 210 u64 last_requested_map; 211 212 struct mutex request_mutex; 213 struct rb_root osds; /* osds */ 214 struct list_head osd_lru; /* idle osds */ 215 u64 timeout_tid; /* tid of timeout triggering rq */ 216 u64 last_tid; /* tid of last request */ 217 struct rb_root requests; /* pending requests */ 218 struct list_head req_lru; /* in-flight lru */ 219 struct list_head req_unsent; /* unsent/need-resend queue */ 220 struct list_head req_notarget; /* map to no osd */ 221 struct list_head req_linger; /* lingering requests */ 222 int num_requests; 223 struct delayed_work timeout_work; 224 struct delayed_work osds_timeout_work; 225 #ifdef CONFIG_DEBUG_FS 226 struct dentry *debugfs_file; 227 #endif 228 229 mempool_t *req_mempool; 230 231 struct ceph_msgpool msgpool_op; 232 struct ceph_msgpool msgpool_op_reply; 233 234 spinlock_t event_lock; 235 struct rb_root event_tree; 236 u64 event_count; 237 238 struct workqueue_struct *notify_wq; 239 }; 240 241 extern int ceph_osdc_setup(void); 242 extern void ceph_osdc_cleanup(void); 243 244 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 245 struct ceph_client *client); 246 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 247 248 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, 249 struct ceph_msg *msg); 250 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 251 struct ceph_msg *msg); 252 253 extern void osd_req_op_init(struct ceph_osd_request *osd_req, 254 unsigned int which, u16 opcode, u32 flags); 255 256 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 257 unsigned int which, 258 struct page **pages, u64 length, 259 u32 alignment, bool pages_from_pool, 260 bool own_pages); 261 262 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 263 unsigned int which, u16 opcode, 264 u64 offset, u64 length, 265 u64 truncate_size, u32 truncate_seq); 266 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 267 unsigned int which, u64 length); 268 extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 269 unsigned int which, u64 offset_inc); 270 271 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 272 struct ceph_osd_request *osd_req, 273 unsigned int which); 274 extern struct ceph_osd_data *osd_req_op_cls_response_data( 275 struct ceph_osd_request *osd_req, 276 unsigned int which); 277 278 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 279 unsigned int which, 280 struct page **pages, u64 length, 281 u32 alignment, bool pages_from_pool, 282 bool own_pages); 283 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 284 unsigned int which, 285 struct ceph_pagelist *pagelist); 286 #ifdef CONFIG_BLOCK 287 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, 288 unsigned int which, 289 struct bio *bio, size_t bio_length); 290 #endif /* CONFIG_BLOCK */ 291 292 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 293 unsigned int which, 294 struct ceph_pagelist *pagelist); 295 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 296 unsigned int which, 297 struct page **pages, u64 length, 298 u32 alignment, bool pages_from_pool, 299 bool own_pages); 300 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, 301 unsigned int which, 302 struct page **pages, u64 length, 303 u32 alignment, bool pages_from_pool, 304 bool own_pages); 305 306 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, 307 unsigned int which, u16 opcode, 308 const char *class, const char *method); 309 extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 310 u16 opcode, const char *name, const void *value, 311 size_t size, u8 cmp_op, u8 cmp_mode); 312 extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 313 unsigned int which, u16 opcode, 314 u64 cookie, u64 version, int flag); 315 extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 316 unsigned int which, 317 u64 expected_object_size, 318 u64 expected_write_size); 319 320 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 321 struct ceph_snap_context *snapc, 322 unsigned int num_ops, 323 bool use_mempool, 324 gfp_t gfp_flags); 325 326 extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 327 struct ceph_snap_context *snapc, 328 u64 snap_id, 329 struct timespec *mtime); 330 331 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 332 struct ceph_file_layout *layout, 333 struct ceph_vino vino, 334 u64 offset, u64 *len, 335 unsigned int which, int num_ops, 336 int opcode, int flags, 337 struct ceph_snap_context *snapc, 338 u32 truncate_seq, u64 truncate_size, 339 bool use_mempool); 340 341 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 342 struct ceph_osd_request *req); 343 344 extern void ceph_osdc_get_request(struct ceph_osd_request *req); 345 extern void ceph_osdc_put_request(struct ceph_osd_request *req); 346 347 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, 348 struct ceph_osd_request *req, 349 bool nofail); 350 extern void ceph_osdc_cancel_request(struct ceph_osd_request *req); 351 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 352 struct ceph_osd_request *req); 353 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 354 355 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 356 357 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, 358 struct ceph_vino vino, 359 struct ceph_file_layout *layout, 360 u64 off, u64 *plen, 361 u32 truncate_seq, u64 truncate_size, 362 struct page **pages, int nr_pages, 363 int page_align); 364 365 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, 366 struct ceph_vino vino, 367 struct ceph_file_layout *layout, 368 struct ceph_snap_context *sc, 369 u64 off, u64 len, 370 u32 truncate_seq, u64 truncate_size, 371 struct timespec *mtime, 372 struct page **pages, int nr_pages); 373 374 /* watch/notify events */ 375 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc, 376 void (*event_cb)(u64, u64, u8, void *), 377 void *data, struct ceph_osd_event **pevent); 378 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event); 379 extern void ceph_osdc_put_event(struct ceph_osd_event *event); 380 #endif 381 382