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 2 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 payload_len; 80 union { 81 struct ceph_osd_data raw_data_in; 82 struct { 83 u64 offset, length; 84 u64 truncate_size; 85 u32 truncate_seq; 86 struct ceph_osd_data osd_data; 87 } extent; 88 struct { 89 const char *class_name; 90 const char *method_name; 91 struct ceph_osd_data request_info; 92 struct ceph_osd_data request_data; 93 struct ceph_osd_data response_data; 94 __u8 class_len; 95 __u8 method_len; 96 __u8 argc; 97 } cls; 98 struct { 99 u64 cookie; 100 u64 ver; 101 u32 prot_ver; 102 u32 timeout; 103 __u8 flag; 104 } watch; 105 }; 106 }; 107 108 /* an in-flight request */ 109 struct ceph_osd_request { 110 u64 r_tid; /* unique for this client */ 111 struct rb_node r_node; 112 struct list_head r_req_lru_item; 113 struct list_head r_osd_item; 114 struct list_head r_linger_item; 115 struct list_head r_linger_osd; 116 struct ceph_osd *r_osd; 117 struct ceph_pg r_pgid; 118 int r_pg_osds[CEPH_PG_MAX_SIZE]; 119 int r_num_pg_osds; 120 121 struct ceph_msg *r_request, *r_reply; 122 int r_flags; /* any additional flags for the osd */ 123 u32 r_sent; /* >0 if r_request is sending/sent */ 124 125 /* request osd ops array */ 126 unsigned int r_num_ops; 127 struct ceph_osd_req_op r_ops[CEPH_OSD_MAX_OP]; 128 129 /* these are updated on each send */ 130 __le32 *r_request_osdmap_epoch; 131 __le32 *r_request_flags; 132 __le64 *r_request_pool; 133 void *r_request_pgid; 134 __le32 *r_request_attempts; 135 bool r_paused; 136 struct ceph_eversion *r_request_reassert_version; 137 138 int r_result; 139 int r_reply_op_len[CEPH_OSD_MAX_OP]; 140 s32 r_reply_op_result[CEPH_OSD_MAX_OP]; 141 int r_got_reply; 142 int r_linger; 143 144 struct ceph_osd_client *r_osdc; 145 struct kref r_kref; 146 bool r_mempool; 147 struct completion r_completion, r_safe_completion; 148 ceph_osdc_callback_t r_callback; 149 ceph_osdc_unsafe_callback_t r_unsafe_callback; 150 struct ceph_eversion r_reassert_version; 151 struct list_head r_unsafe_item; 152 153 struct inode *r_inode; /* for use by callbacks */ 154 void *r_priv; /* ditto */ 155 156 struct ceph_object_locator r_base_oloc; 157 struct ceph_object_id r_base_oid; 158 struct ceph_object_locator r_target_oloc; 159 struct ceph_object_id r_target_oid; 160 161 u64 r_snapid; 162 unsigned long r_stamp; /* send OR check time */ 163 164 struct ceph_snap_context *r_snapc; /* snap context for writes */ 165 }; 166 167 struct ceph_request_redirect { 168 struct ceph_object_locator oloc; 169 }; 170 171 struct ceph_osd_event { 172 u64 cookie; 173 int one_shot; 174 struct ceph_osd_client *osdc; 175 void (*cb)(u64, u64, u8, void *); 176 void *data; 177 struct rb_node node; 178 struct list_head osd_node; 179 struct kref kref; 180 }; 181 182 struct ceph_osd_event_work { 183 struct work_struct work; 184 struct ceph_osd_event *event; 185 u64 ver; 186 u64 notify_id; 187 u8 opcode; 188 }; 189 190 struct ceph_osd_client { 191 struct ceph_client *client; 192 193 struct ceph_osdmap *osdmap; /* current map */ 194 struct rw_semaphore map_sem; 195 struct completion map_waiters; 196 u64 last_requested_map; 197 198 struct mutex request_mutex; 199 struct rb_root osds; /* osds */ 200 struct list_head osd_lru; /* idle osds */ 201 u64 timeout_tid; /* tid of timeout triggering rq */ 202 u64 last_tid; /* tid of last request */ 203 struct rb_root requests; /* pending requests */ 204 struct list_head req_lru; /* in-flight lru */ 205 struct list_head req_unsent; /* unsent/need-resend queue */ 206 struct list_head req_notarget; /* map to no osd */ 207 struct list_head req_linger; /* lingering requests */ 208 int num_requests; 209 struct delayed_work timeout_work; 210 struct delayed_work osds_timeout_work; 211 #ifdef CONFIG_DEBUG_FS 212 struct dentry *debugfs_file; 213 #endif 214 215 mempool_t *req_mempool; 216 217 struct ceph_msgpool msgpool_op; 218 struct ceph_msgpool msgpool_op_reply; 219 220 spinlock_t event_lock; 221 struct rb_root event_tree; 222 u64 event_count; 223 224 struct workqueue_struct *notify_wq; 225 }; 226 227 extern int ceph_osdc_setup(void); 228 extern void ceph_osdc_cleanup(void); 229 230 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 231 struct ceph_client *client); 232 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 233 234 extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, 235 struct ceph_msg *msg); 236 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 237 struct ceph_msg *msg); 238 239 extern void osd_req_op_init(struct ceph_osd_request *osd_req, 240 unsigned int which, u16 opcode); 241 242 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 243 unsigned int which, 244 struct page **pages, u64 length, 245 u32 alignment, bool pages_from_pool, 246 bool own_pages); 247 248 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 249 unsigned int which, u16 opcode, 250 u64 offset, u64 length, 251 u64 truncate_size, u32 truncate_seq); 252 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 253 unsigned int which, u64 length); 254 255 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 256 struct ceph_osd_request *osd_req, 257 unsigned int which); 258 extern struct ceph_osd_data *osd_req_op_cls_response_data( 259 struct ceph_osd_request *osd_req, 260 unsigned int which); 261 262 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 263 unsigned int which, 264 struct page **pages, u64 length, 265 u32 alignment, bool pages_from_pool, 266 bool own_pages); 267 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 268 unsigned int which, 269 struct ceph_pagelist *pagelist); 270 #ifdef CONFIG_BLOCK 271 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, 272 unsigned int which, 273 struct bio *bio, size_t bio_length); 274 #endif /* CONFIG_BLOCK */ 275 276 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 277 unsigned int which, 278 struct ceph_pagelist *pagelist); 279 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 280 unsigned int which, 281 struct page **pages, u64 length, 282 u32 alignment, bool pages_from_pool, 283 bool own_pages); 284 extern void osd_req_op_cls_response_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); 289 290 extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req, 291 unsigned int which, u16 opcode, 292 const char *class, const char *method); 293 extern void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 294 unsigned int which, u16 opcode, 295 u64 cookie, u64 version, int flag); 296 297 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 298 struct ceph_snap_context *snapc, 299 unsigned int num_ops, 300 bool use_mempool, 301 gfp_t gfp_flags); 302 303 extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 304 struct ceph_snap_context *snapc, 305 u64 snap_id, 306 struct timespec *mtime); 307 308 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 309 struct ceph_file_layout *layout, 310 struct ceph_vino vino, 311 u64 offset, u64 *len, 312 int num_ops, int opcode, int flags, 313 struct ceph_snap_context *snapc, 314 u32 truncate_seq, u64 truncate_size, 315 bool use_mempool); 316 317 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 318 struct ceph_osd_request *req); 319 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, 320 struct ceph_osd_request *req); 321 322 static inline void ceph_osdc_get_request(struct ceph_osd_request *req) 323 { 324 kref_get(&req->r_kref); 325 } 326 extern void ceph_osdc_release_request(struct kref *kref); 327 static inline void ceph_osdc_put_request(struct ceph_osd_request *req) 328 { 329 kref_put(&req->r_kref, ceph_osdc_release_request); 330 } 331 332 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, 333 struct ceph_osd_request *req, 334 bool nofail); 335 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 336 struct ceph_osd_request *req); 337 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 338 339 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 340 341 extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, 342 struct ceph_vino vino, 343 struct ceph_file_layout *layout, 344 u64 off, u64 *plen, 345 u32 truncate_seq, u64 truncate_size, 346 struct page **pages, int nr_pages, 347 int page_align); 348 349 extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, 350 struct ceph_vino vino, 351 struct ceph_file_layout *layout, 352 struct ceph_snap_context *sc, 353 u64 off, u64 len, 354 u32 truncate_seq, u64 truncate_size, 355 struct timespec *mtime, 356 struct page **pages, int nr_pages); 357 358 /* watch/notify events */ 359 extern int ceph_osdc_create_event(struct ceph_osd_client *osdc, 360 void (*event_cb)(u64, u64, u8, void *), 361 void *data, struct ceph_osd_event **pevent); 362 extern void ceph_osdc_cancel_event(struct ceph_osd_event *event); 363 extern void ceph_osdc_put_event(struct ceph_osd_event *event); 364 #endif 365 366