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 u32 name_len; 91 u32 value_len; 92 __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */ 93 __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */ 94 struct ceph_osd_data osd_data; 95 } xattr; 96 struct { 97 const char *class_name; 98 const char *method_name; 99 struct ceph_osd_data request_info; 100 struct ceph_osd_data request_data; 101 struct ceph_osd_data response_data; 102 __u8 class_len; 103 __u8 method_len; 104 __u8 argc; 105 } cls; 106 struct { 107 u64 cookie; 108 u64 ver; 109 u32 prot_ver; 110 u32 timeout; 111 __u8 flag; 112 } watch; 113 struct { 114 u64 expected_object_size; 115 u64 expected_write_size; 116 } alloc_hint; 117 }; 118 }; 119 120 /* an in-flight request */ 121 struct ceph_osd_request { 122 u64 r_tid; /* unique for this client */ 123 struct rb_node r_node; 124 struct list_head r_req_lru_item; 125 struct list_head r_osd_item; 126 struct list_head r_linger_item; 127 struct list_head r_linger_osd_item; 128 struct ceph_osd *r_osd; 129 struct ceph_pg r_pgid; 130 int r_pg_osds[CEPH_PG_MAX_SIZE]; 131 int r_num_pg_osds; 132 133 struct ceph_msg *r_request, *r_reply; 134 int r_flags; /* any additional flags for the osd */ 135 u32 r_sent; /* >0 if r_request is sending/sent */ 136 137 /* request osd ops array */ 138 unsigned int r_num_ops; 139 struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP]; 140 141 /* these are updated on each send */ 142 __le32 *r_request_osdmap_epoch; 143 __le32 *r_request_flags; 144 __le64 *r_request_pool; 145 void *r_request_pgid; 146 __le32 *r_request_attempts; 147 bool r_paused; 148 struct ceph_eversion *r_request_reassert_version; 149 150 int r_result; 151 int r_reply_op_len[CEPH_OSD_MAX_OP]; 152 s32 r_reply_op_result[CEPH_OSD_MAX_OP]; 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 }; 178 179 struct ceph_request_redirect { 180 struct ceph_object_locator oloc; 181 }; 182 183 struct ceph_osd_event { 184 u64 cookie; 185 int one_shot; 186 struct ceph_osd_client *osdc; 187 void (*cb)(u64, u64, u8, void *); 188 void *data; 189 struct rb_node node; 190 struct list_head osd_node; 191 struct kref kref; 192 }; 193 194 struct ceph_osd_event_work { 195 struct work_struct work; 196 struct ceph_osd_event *event; 197 u64 ver; 198 u64 notify_id; 199 u8 opcode; 200 }; 201 202 struct ceph_osd_client { 203 struct ceph_client *client; 204 205 struct ceph_osdmap *osdmap; /* current map */ 206 struct rw_semaphore map_sem; 207 struct completion map_waiters; 208 u64 last_requested_map; 209 210 struct mutex request_mutex; 211 struct rb_root osds; /* osds */ 212 struct list_head osd_lru; /* idle osds */ 213 u64 timeout_tid; /* tid of timeout triggering rq */ 214 u64 last_tid; /* tid of last request */ 215 struct rb_root requests; /* pending requests */ 216 struct list_head req_lru; /* in-flight lru */ 217 struct list_head req_unsent; /* unsent/need-resend queue */ 218 struct list_head req_notarget; /* map to no osd */ 219 struct list_head req_linger; /* lingering requests */ 220 int num_requests; 221 struct delayed_work timeout_work; 222 struct delayed_work osds_timeout_work; 223 #ifdef CONFIG_DEBUG_FS 224 struct dentry *debugfs_file; 225 #endif 226 227 mempool_t *req_mempool; 228 229 struct ceph_msgpool msgpool_op; 230 struct ceph_msgpool msgpool_op_reply; 231 232 spinlock_t event_lock; 233 struct rb_root event_tree; 234 u64 event_count; 235 236 struct workqueue_struct *notify_wq; 237 }; 238 239 extern int ceph_osdc_setup(void); 240 extern void ceph_osdc_cleanup(void); 241 242 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 243 struct ceph_client *client); 244 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 245 246 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, 247 struct ceph_msg *msg); 248 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 249 struct ceph_msg *msg); 250 251 extern void osd_req_op_init(struct ceph_osd_request *osd_req, 252 unsigned int which, u16 opcode); 253 254 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 255 unsigned int which, 256 struct page **pages, u64 length, 257 u32 alignment, bool pages_from_pool, 258 bool own_pages); 259 260 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 261 unsigned int which, u16 opcode, 262 u64 offset, u64 length, 263 u64 truncate_size, u32 truncate_seq); 264 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 265 unsigned int which, u64 length); 266 267 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 268 struct ceph_osd_request *osd_req, 269 unsigned int which); 270 extern struct ceph_osd_data *osd_req_op_cls_response_data( 271 struct ceph_osd_request *osd_req, 272 unsigned int which); 273 274 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 275 unsigned int which, 276 struct page **pages, u64 length, 277 u32 alignment, bool pages_from_pool, 278 bool own_pages); 279 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 280 unsigned int which, 281 struct ceph_pagelist *pagelist); 282 #ifdef CONFIG_BLOCK 283 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, 284 unsigned int which, 285 struct bio *bio, size_t bio_length); 286 #endif /* CONFIG_BLOCK */ 287 288 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 289 unsigned int which, 290 struct ceph_pagelist *pagelist); 291 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 292 unsigned int which, 293 struct page **pages, u64 length, 294 u32 alignment, bool pages_from_pool, 295 bool own_pages); 296 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, 297 unsigned int which, 298 struct page **pages, u64 length, 299 u32 alignment, bool pages_from_pool, 300 bool own_pages); 301 302 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, 303 unsigned int which, u16 opcode, 304 const char *class, const char *method); 305 extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 306 u16 opcode, const char *name, const void *value, 307 size_t size, u8 cmp_op, u8 cmp_mode); 308 extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 309 unsigned int which, u16 opcode, 310 u64 cookie, u64 version, int flag); 311 extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 312 unsigned int which, 313 u64 expected_object_size, 314 u64 expected_write_size); 315 316 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 317 struct ceph_snap_context *snapc, 318 unsigned int num_ops, 319 bool use_mempool, 320 gfp_t gfp_flags); 321 322 extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 323 struct ceph_snap_context *snapc, 324 u64 snap_id, 325 struct timespec *mtime); 326 327 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 328 struct ceph_file_layout *layout, 329 struct ceph_vino vino, 330 u64 offset, u64 *len, 331 unsigned int which, int num_ops, 332 int opcode, int flags, 333 struct ceph_snap_context *snapc, 334 u32 truncate_seq, u64 truncate_size, 335 bool use_mempool); 336 337 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 338 struct ceph_osd_request *req); 339 340 extern void ceph_osdc_get_request(struct ceph_osd_request *req); 341 extern void ceph_osdc_put_request(struct ceph_osd_request *req); 342 343 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, 344 struct ceph_osd_request *req, 345 bool nofail); 346 extern void ceph_osdc_cancel_request(struct ceph_osd_request *req); 347 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 348 struct ceph_osd_request *req); 349 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 350 351 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 352 353 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, 354 struct ceph_vino vino, 355 struct ceph_file_layout *layout, 356 u64 off, u64 *plen, 357 u32 truncate_seq, u64 truncate_size, 358 struct page **pages, int nr_pages, 359 int page_align); 360 361 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, 362 struct ceph_vino vino, 363 struct ceph_file_layout *layout, 364 struct ceph_snap_context *sc, 365 u64 off, u64 len, 366 u32 truncate_seq, u64 truncate_size, 367 struct timespec *mtime, 368 struct page **pages, int nr_pages); 369 370 /* watch/notify events */ 371 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc, 372 void (*event_cb)(u64, u64, u8, void *), 373 void *data, struct ceph_osd_event **pevent); 374 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event); 375 extern void ceph_osdc_put_event(struct ceph_osd_event *event); 376 #endif 377 378