Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 1 | #ifndef _FS_CEPH_SUPER_H |
| 2 | #define _FS_CEPH_SUPER_H |
| 3 | |
| 4 | #include "ceph_debug.h" |
| 5 | |
| 6 | #include <asm/unaligned.h> |
| 7 | #include <linux/backing-dev.h> |
| 8 | #include <linux/completion.h> |
| 9 | #include <linux/exportfs.h> |
| 10 | #include <linux/fs.h> |
| 11 | #include <linux/mempool.h> |
| 12 | #include <linux/pagemap.h> |
| 13 | #include <linux/wait.h> |
Stephen Rothwell | f1a3d57 | 2010-01-18 11:53:08 +1100 | [diff] [blame] | 14 | #include <linux/writeback.h> |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 15 | |
| 16 | #include "types.h" |
| 17 | #include "messenger.h" |
| 18 | #include "msgpool.h" |
| 19 | #include "mon_client.h" |
| 20 | #include "mds_client.h" |
| 21 | #include "osd_client.h" |
| 22 | #include "ceph_fs.h" |
| 23 | |
| 24 | /* f_type in struct statfs */ |
| 25 | #define CEPH_SUPER_MAGIC 0x00c36400 |
| 26 | |
| 27 | /* large granularity for statfs utilization stats to facilitate |
| 28 | * large volume sizes on 32-bit machines. */ |
| 29 | #define CEPH_BLOCK_SHIFT 20 /* 1 MB */ |
| 30 | #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) |
| 31 | |
| 32 | /* |
| 33 | * mount options |
| 34 | */ |
| 35 | #define CEPH_OPT_FSID (1<<0) |
| 36 | #define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */ |
| 37 | #define CEPH_OPT_MYIP (1<<2) /* specified my ip */ |
| 38 | #define CEPH_OPT_DIRSTAT (1<<4) /* funky `cat dirname` for stats */ |
| 39 | #define CEPH_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ |
| 40 | #define CEPH_OPT_NOCRC (1<<6) /* no data crc on writes */ |
| 41 | #define CEPH_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ |
| 42 | |
| 43 | #define CEPH_OPT_DEFAULT (CEPH_OPT_RBYTES) |
| 44 | |
| 45 | #define ceph_set_opt(client, opt) \ |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 46 | (client)->mount_args->flags |= CEPH_OPT_##opt; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 47 | #define ceph_test_opt(client, opt) \ |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 48 | (!!((client)->mount_args->flags & CEPH_OPT_##opt)) |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 49 | |
| 50 | |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 51 | struct ceph_mount_args { |
| 52 | int sb_flags; |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 53 | int num_mon; |
| 54 | struct ceph_entity_addr *mon_addr; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 55 | int flags; |
| 56 | int mount_timeout; |
Yehuda Sadeh | f5a2041 | 2010-02-03 11:00:26 -0800 | [diff] [blame] | 57 | int osd_idle_ttl; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 58 | int caps_wanted_delay_min, caps_wanted_delay_max; |
| 59 | struct ceph_fsid fsid; |
| 60 | struct ceph_entity_addr my_addr; |
| 61 | int wsize; |
| 62 | int rsize; /* max readahead */ |
| 63 | int max_readdir; /* max readdir size */ |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 64 | int congestion_kb; /* max readdir size */ |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 65 | int osd_timeout; |
Yehuda Sadeh | 422d2cb | 2010-02-26 15:32:31 -0800 | [diff] [blame] | 66 | int osd_keepalive_timeout; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 67 | char *snapdir_name; /* default ".snap" */ |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 68 | char *name; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 69 | char *secret; |
| 70 | int cap_release_safety; |
| 71 | }; |
| 72 | |
| 73 | /* |
| 74 | * defaults |
| 75 | */ |
| 76 | #define CEPH_MOUNT_TIMEOUT_DEFAULT 60 |
Yehuda Sadeh | 422d2cb | 2010-02-26 15:32:31 -0800 | [diff] [blame] | 77 | #define CEPH_OSD_TIMEOUT_DEFAULT 60 /* seconds */ |
| 78 | #define CEPH_OSD_KEEPALIVE_DEFAULT 5 |
Yehuda Sadeh | f5a2041 | 2010-02-03 11:00:26 -0800 | [diff] [blame] | 79 | #define CEPH_OSD_IDLE_TTL_DEFAULT 60 |
Sage Weil | 8fa9765 | 2009-10-16 14:44:35 -0700 | [diff] [blame] | 80 | #define CEPH_MOUNT_RSIZE_DEFAULT (512*1024) /* readahead */ |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 81 | |
| 82 | #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024) |
| 83 | #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024) |
| 84 | |
| 85 | #define CEPH_SNAPDIRNAME_DEFAULT ".snap" |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 86 | #define CEPH_AUTH_NAME_DEFAULT "guest" |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | * Delay telling the MDS we no longer want caps, in case we reopen |
| 90 | * the file. Delay a minimum amount of time, even if we send a cap |
| 91 | * message for some other reason. Otherwise, take the oppotunity to |
| 92 | * update the mds to avoid sending another message later. |
| 93 | */ |
| 94 | #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ |
| 95 | #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ |
| 96 | |
| 97 | |
| 98 | /* mount state */ |
| 99 | enum { |
| 100 | CEPH_MOUNT_MOUNTING, |
| 101 | CEPH_MOUNT_MOUNTED, |
| 102 | CEPH_MOUNT_UNMOUNTING, |
| 103 | CEPH_MOUNT_UNMOUNTED, |
| 104 | CEPH_MOUNT_SHUTDOWN, |
| 105 | }; |
| 106 | |
| 107 | /* |
| 108 | * subtract jiffies |
| 109 | */ |
| 110 | static inline unsigned long time_sub(unsigned long a, unsigned long b) |
| 111 | { |
| 112 | BUG_ON(time_after(b, a)); |
| 113 | return (long)a - (long)b; |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * per-filesystem client state |
| 118 | * |
| 119 | * possibly shared by multiple mount points, if they are |
| 120 | * mounting the same ceph filesystem/cluster. |
| 121 | */ |
| 122 | struct ceph_client { |
Sage Weil | 0743304 | 2009-11-18 16:50:41 -0800 | [diff] [blame] | 123 | struct ceph_fsid fsid; |
| 124 | bool have_fsid; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 125 | |
| 126 | struct mutex mount_mutex; /* serialize mount attempts */ |
Sage Weil | 6b80518 | 2009-10-27 11:50:50 -0700 | [diff] [blame] | 127 | struct ceph_mount_args *mount_args; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 128 | |
| 129 | struct super_block *sb; |
| 130 | |
| 131 | unsigned long mount_state; |
Sage Weil | 9bd2e6f | 2010-02-02 16:21:06 -0800 | [diff] [blame] | 132 | wait_queue_head_t auth_wq; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 133 | |
Sage Weil | 9bd2e6f | 2010-02-02 16:21:06 -0800 | [diff] [blame] | 134 | int auth_err; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 135 | |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 136 | int min_caps; /* min caps i added */ |
| 137 | |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 138 | struct ceph_messenger *msgr; /* messenger instance */ |
| 139 | struct ceph_mon_client monc; |
| 140 | struct ceph_mds_client mdsc; |
| 141 | struct ceph_osd_client osdc; |
| 142 | |
| 143 | /* writeback */ |
| 144 | mempool_t *wb_pagevec_pool; |
| 145 | struct workqueue_struct *wb_wq; |
| 146 | struct workqueue_struct *pg_inv_wq; |
| 147 | struct workqueue_struct *trunc_wq; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 148 | atomic_long_t writeback_count; |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 149 | |
| 150 | struct backing_dev_info backing_dev_info; |
Sage Weil | 0743304 | 2009-11-18 16:50:41 -0800 | [diff] [blame] | 151 | |
| 152 | #ifdef CONFIG_DEBUG_FS |
| 153 | struct dentry *debugfs_monmap; |
| 154 | struct dentry *debugfs_mdsmap, *debugfs_osdmap; |
| 155 | struct dentry *debugfs_dir, *debugfs_dentry_lru, *debugfs_caps; |
Yehuda Sadeh | 2baba25 | 2009-12-18 13:51:57 -0800 | [diff] [blame] | 156 | struct dentry *debugfs_congestion_kb; |
Sage Weil | 06edf04 | 2009-12-15 14:44:32 -0800 | [diff] [blame] | 157 | struct dentry *debugfs_bdi; |
Sage Weil | 0743304 | 2009-11-18 16:50:41 -0800 | [diff] [blame] | 158 | #endif |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 159 | }; |
| 160 | |
| 161 | static inline struct ceph_client *ceph_client(struct super_block *sb) |
| 162 | { |
| 163 | return sb->s_fs_info; |
| 164 | } |
| 165 | |
| 166 | |
| 167 | /* |
| 168 | * File i/o capability. This tracks shared state with the metadata |
| 169 | * server that allows us to cache or writeback attributes or to read |
| 170 | * and write data. For any given inode, we should have one or more |
| 171 | * capabilities, one issued by each metadata server, and our |
| 172 | * cumulative access is the OR of all issued capabilities. |
| 173 | * |
| 174 | * Each cap is referenced by the inode's i_caps rbtree and by per-mds |
| 175 | * session capability lists. |
| 176 | */ |
| 177 | struct ceph_cap { |
| 178 | struct ceph_inode_info *ci; |
| 179 | struct rb_node ci_node; /* per-ci cap tree */ |
| 180 | struct ceph_mds_session *session; |
| 181 | struct list_head session_caps; /* per-session caplist */ |
| 182 | int mds; |
| 183 | u64 cap_id; /* unique cap id (mds provided) */ |
| 184 | int issued; /* latest, from the mds */ |
| 185 | int implemented; /* implemented superset of issued (for revocation) */ |
| 186 | int mds_wanted; |
Sage Weil | 685f9a5d | 2009-11-09 12:05:48 -0800 | [diff] [blame] | 187 | u32 seq, issue_seq, mseq; |
| 188 | u32 cap_gen; /* active/stale cycle */ |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 189 | unsigned long last_used; |
| 190 | struct list_head caps_item; |
| 191 | }; |
| 192 | |
| 193 | #define CHECK_CAPS_NODELAY 1 /* do not delay any further */ |
| 194 | #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */ |
| 195 | #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */ |
| 196 | |
| 197 | /* |
| 198 | * Snapped cap state that is pending flush to mds. When a snapshot occurs, |
| 199 | * we first complete any in-process sync writes and writeback any dirty |
| 200 | * data before flushing the snapped state (tracked here) back to the MDS. |
| 201 | */ |
| 202 | struct ceph_cap_snap { |
| 203 | atomic_t nref; |
| 204 | struct ceph_inode_info *ci; |
| 205 | struct list_head ci_item, flushing_item; |
| 206 | |
| 207 | u64 follows, flush_tid; |
| 208 | int issued, dirty; |
| 209 | struct ceph_snap_context *context; |
| 210 | |
| 211 | mode_t mode; |
| 212 | uid_t uid; |
| 213 | gid_t gid; |
| 214 | |
| 215 | void *xattr_blob; |
| 216 | int xattr_len; |
| 217 | u64 xattr_version; |
| 218 | |
| 219 | u64 size; |
| 220 | struct timespec mtime, atime, ctime; |
| 221 | u64 time_warp_seq; |
| 222 | int writing; /* a sync write is still in progress */ |
| 223 | int dirty_pages; /* dirty pages awaiting writeback */ |
| 224 | }; |
| 225 | |
| 226 | static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) |
| 227 | { |
| 228 | if (atomic_dec_and_test(&capsnap->nref)) |
| 229 | kfree(capsnap); |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * The frag tree describes how a directory is fragmented, potentially across |
| 234 | * multiple metadata servers. It is also used to indicate points where |
| 235 | * metadata authority is delegated, and whether/where metadata is replicated. |
| 236 | * |
| 237 | * A _leaf_ frag will be present in the i_fragtree IFF there is |
| 238 | * delegation info. That is, if mds >= 0 || ndist > 0. |
| 239 | */ |
| 240 | #define CEPH_MAX_DIRFRAG_REP 4 |
| 241 | |
| 242 | struct ceph_inode_frag { |
| 243 | struct rb_node node; |
| 244 | |
| 245 | /* fragtree state */ |
| 246 | u32 frag; |
| 247 | int split_by; /* i.e. 2^(split_by) children */ |
| 248 | |
| 249 | /* delegation and replication info */ |
| 250 | int mds; /* -1 if same authority as parent */ |
| 251 | int ndist; /* >0 if replicated */ |
| 252 | int dist[CEPH_MAX_DIRFRAG_REP]; |
| 253 | }; |
| 254 | |
| 255 | /* |
| 256 | * We cache inode xattrs as an encoded blob until they are first used, |
| 257 | * at which point we parse them into an rbtree. |
| 258 | */ |
| 259 | struct ceph_inode_xattr { |
| 260 | struct rb_node node; |
| 261 | |
| 262 | const char *name; |
| 263 | int name_len; |
| 264 | const char *val; |
| 265 | int val_len; |
| 266 | int dirty; |
| 267 | |
| 268 | int should_free_name; |
| 269 | int should_free_val; |
| 270 | }; |
| 271 | |
| 272 | struct ceph_inode_xattrs_info { |
| 273 | /* |
| 274 | * (still encoded) xattr blob. we avoid the overhead of parsing |
| 275 | * this until someone actually calls getxattr, etc. |
| 276 | * |
| 277 | * blob->vec.iov_len == 4 implies there are no xattrs; blob == |
| 278 | * NULL means we don't know. |
| 279 | */ |
| 280 | struct ceph_buffer *blob, *prealloc_blob; |
| 281 | |
| 282 | struct rb_root index; |
| 283 | bool dirty; |
| 284 | int count; |
| 285 | int names_size; |
| 286 | int vals_size; |
| 287 | u64 version, index_version; |
| 288 | }; |
| 289 | |
| 290 | /* |
| 291 | * Ceph inode. |
| 292 | */ |
| 293 | #define CEPH_I_COMPLETE 1 /* we have complete directory cached */ |
| 294 | #define CEPH_I_NODELAY 4 /* do not delay cap release */ |
| 295 | #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */ |
Sage Weil | e9964c1 | 2010-03-01 15:16:56 -0800 | [diff] [blame] | 296 | #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */ |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 297 | |
| 298 | struct ceph_inode_info { |
| 299 | struct ceph_vino i_vino; /* ceph ino + snap */ |
| 300 | |
| 301 | u64 i_version; |
| 302 | u32 i_time_warp_seq; |
| 303 | |
| 304 | unsigned i_ceph_flags; |
| 305 | unsigned long i_release_count; |
| 306 | |
| 307 | struct ceph_file_layout i_layout; |
| 308 | char *i_symlink; |
| 309 | |
| 310 | /* for dirs */ |
| 311 | struct timespec i_rctime; |
| 312 | u64 i_rbytes, i_rfiles, i_rsubdirs; |
| 313 | u64 i_files, i_subdirs; |
| 314 | u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */ |
| 315 | |
| 316 | struct rb_root i_fragtree; |
| 317 | struct mutex i_fragtree_mutex; |
| 318 | |
| 319 | struct ceph_inode_xattrs_info i_xattrs; |
| 320 | |
| 321 | /* capabilities. protected _both_ by i_lock and cap->session's |
| 322 | * s_mutex. */ |
| 323 | struct rb_root i_caps; /* cap list */ |
| 324 | struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ |
| 325 | unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ |
| 326 | struct list_head i_dirty_item, i_flushing_item; |
| 327 | u64 i_cap_flush_seq; |
| 328 | /* we need to track cap writeback on a per-cap-bit basis, to allow |
| 329 | * overlapping, pipelined cap flushes to the mds. we can probably |
| 330 | * reduce the tid to 8 bits if we're concerned about inode size. */ |
| 331 | u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS]; |
| 332 | wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ |
| 333 | unsigned long i_hold_caps_min; /* jiffies */ |
| 334 | unsigned long i_hold_caps_max; /* jiffies */ |
| 335 | struct list_head i_cap_delay_list; /* for delayed cap release to mds */ |
| 336 | int i_cap_exporting_mds; /* to handle cap migration between */ |
| 337 | unsigned i_cap_exporting_mseq; /* mds's. */ |
| 338 | unsigned i_cap_exporting_issued; |
| 339 | struct ceph_cap_reservation i_cap_migration_resv; |
| 340 | struct list_head i_cap_snaps; /* snapped state pending flush to mds */ |
| 341 | struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 */ |
| 342 | unsigned i_snap_caps; /* cap bits for snapped files */ |
| 343 | |
| 344 | int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */ |
| 345 | |
| 346 | u32 i_truncate_seq; /* last truncate to smaller size */ |
| 347 | u64 i_truncate_size; /* and the size we last truncated down to */ |
| 348 | int i_truncate_pending; /* still need to call vmtruncate */ |
| 349 | |
| 350 | u64 i_max_size; /* max file size authorized by mds */ |
| 351 | u64 i_reported_size; /* (max_)size reported to or requested of mds */ |
| 352 | u64 i_wanted_max_size; /* offset we'd like to write too */ |
| 353 | u64 i_requested_max_size; /* max_size we've requested */ |
| 354 | |
| 355 | /* held references to caps */ |
| 356 | int i_pin_ref; |
| 357 | int i_rd_ref, i_rdcache_ref, i_wr_ref; |
| 358 | int i_wrbuffer_ref, i_wrbuffer_ref_head; |
| 359 | u32 i_shared_gen; /* increment each time we get FILE_SHARED */ |
| 360 | u32 i_rdcache_gen; /* we increment this each time we get |
| 361 | FILE_CACHE. If it's non-zero, we |
| 362 | _may_ have cached pages. */ |
| 363 | u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ |
| 364 | |
| 365 | struct list_head i_unsafe_writes; /* uncommitted sync writes */ |
| 366 | struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ |
| 367 | spinlock_t i_unsafe_lock; |
| 368 | |
| 369 | struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ |
| 370 | int i_snap_realm_counter; /* snap realm (if caps) */ |
| 371 | struct list_head i_snap_realm_item; |
| 372 | struct list_head i_snap_flush_item; |
| 373 | |
| 374 | struct work_struct i_wb_work; /* writeback work */ |
| 375 | struct work_struct i_pg_inv_work; /* page invalidation work */ |
| 376 | |
| 377 | struct work_struct i_vmtruncate_work; |
| 378 | |
| 379 | struct inode vfs_inode; /* at end */ |
| 380 | }; |
| 381 | |
| 382 | static inline struct ceph_inode_info *ceph_inode(struct inode *inode) |
| 383 | { |
Noah Watkins | fbbccec | 2009-10-28 11:54:49 -0700 | [diff] [blame] | 384 | return container_of(inode, struct ceph_inode_info, vfs_inode); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | static inline void ceph_i_clear(struct inode *inode, unsigned mask) |
| 388 | { |
| 389 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 390 | |
| 391 | spin_lock(&inode->i_lock); |
| 392 | ci->i_ceph_flags &= ~mask; |
| 393 | spin_unlock(&inode->i_lock); |
| 394 | } |
| 395 | |
| 396 | static inline void ceph_i_set(struct inode *inode, unsigned mask) |
| 397 | { |
| 398 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 399 | |
| 400 | spin_lock(&inode->i_lock); |
| 401 | ci->i_ceph_flags |= mask; |
| 402 | spin_unlock(&inode->i_lock); |
| 403 | } |
| 404 | |
| 405 | static inline bool ceph_i_test(struct inode *inode, unsigned mask) |
| 406 | { |
| 407 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 408 | bool r; |
| 409 | |
| 410 | smp_mb(); |
| 411 | r = (ci->i_ceph_flags & mask) == mask; |
| 412 | return r; |
| 413 | } |
| 414 | |
| 415 | |
| 416 | /* find a specific frag @f */ |
| 417 | extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, |
| 418 | u32 f); |
| 419 | |
| 420 | /* |
| 421 | * choose fragment for value @v. copy frag content to pfrag, if leaf |
| 422 | * exists |
| 423 | */ |
| 424 | extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
| 425 | struct ceph_inode_frag *pfrag, |
| 426 | int *found); |
| 427 | |
| 428 | /* |
| 429 | * Ceph dentry state |
| 430 | */ |
| 431 | struct ceph_dentry_info { |
| 432 | struct ceph_mds_session *lease_session; |
| 433 | u32 lease_gen, lease_shared_gen; |
| 434 | u32 lease_seq; |
| 435 | unsigned long lease_renew_after, lease_renew_from; |
| 436 | struct list_head lru; |
| 437 | struct dentry *dentry; |
| 438 | u64 time; |
| 439 | u64 offset; |
| 440 | }; |
| 441 | |
| 442 | static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry) |
| 443 | { |
| 444 | return (struct ceph_dentry_info *)dentry->d_fsdata; |
| 445 | } |
| 446 | |
| 447 | static inline loff_t ceph_make_fpos(unsigned frag, unsigned off) |
| 448 | { |
| 449 | return ((loff_t)frag << 32) | (loff_t)off; |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | * ino_t is <64 bits on many architectures, blech. |
| 454 | * |
| 455 | * don't include snap in ino hash, at least for now. |
| 456 | */ |
| 457 | static inline ino_t ceph_vino_to_ino(struct ceph_vino vino) |
| 458 | { |
| 459 | ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */ |
| 460 | #if BITS_PER_LONG == 32 |
| 461 | ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8; |
| 462 | if (!ino) |
| 463 | ino = 1; |
| 464 | #endif |
| 465 | return ino; |
| 466 | } |
| 467 | |
| 468 | static inline int ceph_set_ino_cb(struct inode *inode, void *data) |
| 469 | { |
| 470 | ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; |
| 471 | inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | static inline struct ceph_vino ceph_vino(struct inode *inode) |
| 476 | { |
| 477 | return ceph_inode(inode)->i_vino; |
| 478 | } |
| 479 | |
| 480 | /* for printf-style formatting */ |
| 481 | #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap |
| 482 | |
| 483 | static inline u64 ceph_ino(struct inode *inode) |
| 484 | { |
| 485 | return ceph_inode(inode)->i_vino.ino; |
| 486 | } |
| 487 | static inline u64 ceph_snap(struct inode *inode) |
| 488 | { |
| 489 | return ceph_inode(inode)->i_vino.snap; |
| 490 | } |
| 491 | |
| 492 | static inline int ceph_ino_compare(struct inode *inode, void *data) |
| 493 | { |
| 494 | struct ceph_vino *pvino = (struct ceph_vino *)data; |
| 495 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 496 | return ci->i_vino.ino == pvino->ino && |
| 497 | ci->i_vino.snap == pvino->snap; |
| 498 | } |
| 499 | |
| 500 | static inline struct inode *ceph_find_inode(struct super_block *sb, |
| 501 | struct ceph_vino vino) |
| 502 | { |
| 503 | ino_t t = ceph_vino_to_ino(vino); |
| 504 | return ilookup5(sb, t, ceph_ino_compare, &vino); |
| 505 | } |
| 506 | |
| 507 | |
| 508 | /* |
| 509 | * caps helpers |
| 510 | */ |
| 511 | static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) |
| 512 | { |
| 513 | return !RB_EMPTY_ROOT(&ci->i_caps); |
| 514 | } |
| 515 | |
| 516 | extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); |
| 517 | extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); |
| 518 | extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, |
| 519 | struct ceph_cap *cap); |
| 520 | |
| 521 | static inline int ceph_caps_issued(struct ceph_inode_info *ci) |
| 522 | { |
| 523 | int issued; |
| 524 | spin_lock(&ci->vfs_inode.i_lock); |
| 525 | issued = __ceph_caps_issued(ci, NULL); |
| 526 | spin_unlock(&ci->vfs_inode.i_lock); |
| 527 | return issued; |
| 528 | } |
| 529 | |
| 530 | static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, |
| 531 | int touch) |
| 532 | { |
| 533 | int r; |
| 534 | spin_lock(&ci->vfs_inode.i_lock); |
| 535 | r = __ceph_caps_issued_mask(ci, mask, touch); |
| 536 | spin_unlock(&ci->vfs_inode.i_lock); |
| 537 | return r; |
| 538 | } |
| 539 | |
| 540 | static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) |
| 541 | { |
| 542 | return ci->i_dirty_caps | ci->i_flushing_caps; |
| 543 | } |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 544 | extern void __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 545 | |
| 546 | extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); |
| 547 | extern int __ceph_caps_used(struct ceph_inode_info *ci); |
| 548 | |
| 549 | extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); |
| 550 | |
| 551 | /* |
| 552 | * wanted, by virtue of open file modes AND cap refs (buffered/cached data) |
| 553 | */ |
| 554 | static inline int __ceph_caps_wanted(struct ceph_inode_info *ci) |
| 555 | { |
| 556 | int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci); |
| 557 | if (w & CEPH_CAP_FILE_BUFFER) |
| 558 | w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */ |
| 559 | return w; |
| 560 | } |
| 561 | |
| 562 | /* what the mds thinks we want */ |
| 563 | extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci); |
| 564 | |
| 565 | extern void ceph_caps_init(void); |
| 566 | extern void ceph_caps_finalize(void); |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 567 | extern void ceph_adjust_min_caps(int delta); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 568 | extern int ceph_reserve_caps(struct ceph_cap_reservation *ctx, int need); |
| 569 | extern int ceph_unreserve_caps(struct ceph_cap_reservation *ctx); |
| 570 | extern void ceph_reservation_status(struct ceph_client *client, |
| 571 | int *total, int *avail, int *used, |
Sage Weil | 85ccce4 | 2010-02-17 10:02:43 -0800 | [diff] [blame] | 572 | int *reserved, int *min); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 573 | |
| 574 | static inline struct ceph_client *ceph_inode_to_client(struct inode *inode) |
| 575 | { |
| 576 | return (struct ceph_client *)inode->i_sb->s_fs_info; |
| 577 | } |
| 578 | |
| 579 | static inline struct ceph_client *ceph_sb_to_client(struct super_block *sb) |
| 580 | { |
| 581 | return (struct ceph_client *)sb->s_fs_info; |
| 582 | } |
| 583 | |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 584 | |
| 585 | /* |
| 586 | * we keep buffered readdir results attached to file->private_data |
| 587 | */ |
| 588 | struct ceph_file_info { |
| 589 | int fmode; /* initialized on open */ |
| 590 | |
| 591 | /* readdir: position within the dir */ |
| 592 | u32 frag; |
| 593 | struct ceph_mds_request *last_readdir; |
| 594 | int at_end; |
| 595 | |
| 596 | /* readdir: position within a frag */ |
| 597 | unsigned offset; /* offset of last chunk, adjusted for . and .. */ |
| 598 | u64 next_offset; /* offset of next chunk (last_name's + 1) */ |
| 599 | char *last_name; /* last entry in previous chunk */ |
| 600 | struct dentry *dentry; /* next dentry (for dcache readdir) */ |
| 601 | unsigned long dir_release_count; |
| 602 | |
| 603 | /* used for -o dirstat read() on directory thing */ |
| 604 | char *dir_info; |
| 605 | int dir_info_len; |
| 606 | }; |
| 607 | |
| 608 | |
| 609 | |
| 610 | /* |
| 611 | * snapshots |
| 612 | */ |
| 613 | |
| 614 | /* |
| 615 | * A "snap context" is the set of existing snapshots when we |
| 616 | * write data. It is used by the OSD to guide its COW behavior. |
| 617 | * |
| 618 | * The ceph_snap_context is refcounted, and attached to each dirty |
| 619 | * page, indicating which context the dirty data belonged when it was |
| 620 | * dirtied. |
| 621 | */ |
| 622 | struct ceph_snap_context { |
| 623 | atomic_t nref; |
| 624 | u64 seq; |
| 625 | int num_snaps; |
| 626 | u64 snaps[]; |
| 627 | }; |
| 628 | |
| 629 | static inline struct ceph_snap_context * |
| 630 | ceph_get_snap_context(struct ceph_snap_context *sc) |
| 631 | { |
| 632 | /* |
| 633 | printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref), |
| 634 | atomic_read(&sc->nref)+1); |
| 635 | */ |
| 636 | if (sc) |
| 637 | atomic_inc(&sc->nref); |
| 638 | return sc; |
| 639 | } |
| 640 | |
| 641 | static inline void ceph_put_snap_context(struct ceph_snap_context *sc) |
| 642 | { |
| 643 | if (!sc) |
| 644 | return; |
| 645 | /* |
| 646 | printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref), |
| 647 | atomic_read(&sc->nref)-1); |
| 648 | */ |
| 649 | if (atomic_dec_and_test(&sc->nref)) { |
| 650 | /*printk(" deleting snap_context %p\n", sc);*/ |
| 651 | kfree(sc); |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * A "snap realm" describes a subset of the file hierarchy sharing |
| 657 | * the same set of snapshots that apply to it. The realms themselves |
| 658 | * are organized into a hierarchy, such that children inherit (some of) |
| 659 | * the snapshots of their parents. |
| 660 | * |
| 661 | * All inodes within the realm that have capabilities are linked into a |
| 662 | * per-realm list. |
| 663 | */ |
| 664 | struct ceph_snap_realm { |
| 665 | u64 ino; |
| 666 | atomic_t nref; |
Sage Weil | a105f00 | 2010-02-15 14:37:55 -0800 | [diff] [blame] | 667 | struct rb_node node; |
| 668 | |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 669 | u64 created, seq; |
| 670 | u64 parent_ino; |
| 671 | u64 parent_since; /* snapid when our current parent became so */ |
| 672 | |
| 673 | u64 *prior_parent_snaps; /* snaps inherited from any parents we */ |
| 674 | int num_prior_parent_snaps; /* had prior to parent_since */ |
| 675 | u64 *snaps; /* snaps specific to this realm */ |
| 676 | int num_snaps; |
| 677 | |
| 678 | struct ceph_snap_realm *parent; |
| 679 | struct list_head children; /* list of child realms */ |
| 680 | struct list_head child_item; |
| 681 | |
| 682 | struct list_head empty_item; /* if i have ref==0 */ |
| 683 | |
| 684 | /* the current set of snaps for this realm */ |
| 685 | struct ceph_snap_context *cached_context; |
| 686 | |
| 687 | struct list_head inodes_with_caps; |
| 688 | spinlock_t inodes_with_caps_lock; |
| 689 | }; |
| 690 | |
| 691 | |
| 692 | |
| 693 | /* |
| 694 | * calculate the number of pages a given length and offset map onto, |
| 695 | * if we align the data. |
| 696 | */ |
| 697 | static inline int calc_pages_for(u64 off, u64 len) |
| 698 | { |
| 699 | return ((off+len+PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) - |
| 700 | (off >> PAGE_CACHE_SHIFT); |
| 701 | } |
| 702 | |
| 703 | |
| 704 | |
| 705 | /* snap.c */ |
| 706 | struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, |
| 707 | u64 ino); |
| 708 | extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, |
| 709 | struct ceph_snap_realm *realm); |
| 710 | extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, |
| 711 | struct ceph_snap_realm *realm); |
| 712 | extern int ceph_update_snap_trace(struct ceph_mds_client *m, |
| 713 | void *p, void *e, bool deletion); |
| 714 | extern void ceph_handle_snap(struct ceph_mds_client *mdsc, |
Sage Weil | 2600d2d | 2010-02-22 15:12:16 -0800 | [diff] [blame] | 715 | struct ceph_mds_session *session, |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 716 | struct ceph_msg *msg); |
| 717 | extern void ceph_queue_cap_snap(struct ceph_inode_info *ci, |
| 718 | struct ceph_snap_context *snapc); |
| 719 | extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, |
| 720 | struct ceph_cap_snap *capsnap); |
| 721 | extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); |
| 722 | |
| 723 | /* |
| 724 | * a cap_snap is "pending" if it is still awaiting an in-progress |
| 725 | * sync write (that may/may not still update size, mtime, etc.). |
| 726 | */ |
| 727 | static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) |
| 728 | { |
| 729 | return !list_empty(&ci->i_cap_snaps) && |
| 730 | list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap, |
| 731 | ci_item)->writing; |
| 732 | } |
| 733 | |
| 734 | |
| 735 | /* super.c */ |
| 736 | extern struct kmem_cache *ceph_inode_cachep; |
| 737 | extern struct kmem_cache *ceph_cap_cachep; |
| 738 | extern struct kmem_cache *ceph_dentry_cachep; |
| 739 | extern struct kmem_cache *ceph_file_cachep; |
| 740 | |
| 741 | extern const char *ceph_msg_type_name(int type); |
Sage Weil | 0743304 | 2009-11-18 16:50:41 -0800 | [diff] [blame] | 742 | extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 743 | |
| 744 | #define FSID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \ |
| 745 | "%02x%02x%02x%02x%02x%02x" |
| 746 | #define PR_FSID(f) (f)->fsid[0], (f)->fsid[1], (f)->fsid[2], (f)->fsid[3], \ |
| 747 | (f)->fsid[4], (f)->fsid[5], (f)->fsid[6], (f)->fsid[7], \ |
| 748 | (f)->fsid[8], (f)->fsid[9], (f)->fsid[10], (f)->fsid[11], \ |
| 749 | (f)->fsid[12], (f)->fsid[13], (f)->fsid[14], (f)->fsid[15] |
| 750 | |
| 751 | /* inode.c */ |
| 752 | extern const struct inode_operations ceph_file_iops; |
| 753 | |
| 754 | extern struct inode *ceph_alloc_inode(struct super_block *sb); |
| 755 | extern void ceph_destroy_inode(struct inode *inode); |
| 756 | |
| 757 | extern struct inode *ceph_get_inode(struct super_block *sb, |
| 758 | struct ceph_vino vino); |
| 759 | extern struct inode *ceph_get_snapdir(struct inode *parent); |
| 760 | extern int ceph_fill_file_size(struct inode *inode, int issued, |
| 761 | u32 truncate_seq, u64 truncate_size, u64 size); |
| 762 | extern void ceph_fill_file_time(struct inode *inode, int issued, |
| 763 | u64 time_warp_seq, struct timespec *ctime, |
| 764 | struct timespec *mtime, struct timespec *atime); |
| 765 | extern int ceph_fill_trace(struct super_block *sb, |
| 766 | struct ceph_mds_request *req, |
| 767 | struct ceph_mds_session *session); |
| 768 | extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
| 769 | struct ceph_mds_session *session); |
| 770 | |
| 771 | extern int ceph_inode_holds_cap(struct inode *inode, int mask); |
| 772 | |
| 773 | extern int ceph_inode_set_size(struct inode *inode, loff_t size); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 774 | extern void __ceph_do_pending_vmtruncate(struct inode *inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 775 | extern void ceph_queue_vmtruncate(struct inode *inode); |
| 776 | |
| 777 | extern void ceph_queue_invalidate(struct inode *inode); |
| 778 | extern void ceph_queue_writeback(struct inode *inode); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 779 | |
| 780 | extern int ceph_do_getattr(struct inode *inode, int mask); |
| 781 | extern int ceph_permission(struct inode *inode, int mask); |
| 782 | extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); |
| 783 | extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 784 | struct kstat *stat); |
| 785 | |
| 786 | /* xattr.c */ |
| 787 | extern int ceph_setxattr(struct dentry *, const char *, const void *, |
| 788 | size_t, int); |
| 789 | extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t); |
| 790 | extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); |
| 791 | extern int ceph_removexattr(struct dentry *, const char *); |
| 792 | extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci); |
| 793 | extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); |
| 794 | |
| 795 | /* caps.c */ |
| 796 | extern const char *ceph_cap_string(int c); |
| 797 | extern void ceph_handle_caps(struct ceph_mds_session *session, |
| 798 | struct ceph_msg *msg); |
| 799 | extern int ceph_add_cap(struct inode *inode, |
| 800 | struct ceph_mds_session *session, u64 cap_id, |
| 801 | int fmode, unsigned issued, unsigned wanted, |
| 802 | unsigned cap, unsigned seq, u64 realmino, int flags, |
| 803 | struct ceph_cap_reservation *caps_reservation); |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 804 | extern void __ceph_remove_cap(struct ceph_cap *cap); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 805 | static inline void ceph_remove_cap(struct ceph_cap *cap) |
| 806 | { |
| 807 | struct inode *inode = &cap->ci->vfs_inode; |
| 808 | spin_lock(&inode->i_lock); |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 809 | __ceph_remove_cap(cap); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 810 | spin_unlock(&inode->i_lock); |
| 811 | } |
Sage Weil | 7c1332b | 2010-02-16 11:39:45 -0800 | [diff] [blame] | 812 | extern void ceph_put_cap(struct ceph_cap *cap); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 813 | |
| 814 | extern void ceph_queue_caps_release(struct inode *inode); |
Stephen Rothwell | f1a3d57 | 2010-01-18 11:53:08 +1100 | [diff] [blame] | 815 | extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 816 | extern int ceph_fsync(struct file *file, struct dentry *dentry, int datasync); |
| 817 | extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, |
| 818 | struct ceph_mds_session *session); |
| 819 | extern int ceph_get_cap_mds(struct inode *inode); |
| 820 | extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); |
| 821 | extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); |
| 822 | extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, |
| 823 | struct ceph_snap_context *snapc); |
| 824 | extern void __ceph_flush_snaps(struct ceph_inode_info *ci, |
| 825 | struct ceph_mds_session **psession); |
| 826 | extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, |
| 827 | struct ceph_mds_session *session); |
Sage Weil | afcdaea | 2009-10-14 14:27:38 -0700 | [diff] [blame] | 828 | extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); |
| 829 | extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); |
Sage Weil | de57606 | 2009-10-06 11:31:07 -0700 | [diff] [blame] | 830 | |
| 831 | extern int ceph_encode_inode_release(void **p, struct inode *inode, |
| 832 | int mds, int drop, int unless, int force); |
| 833 | extern int ceph_encode_dentry_release(void **p, struct dentry *dn, |
| 834 | int mds, int drop, int unless); |
| 835 | |
| 836 | extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, |
| 837 | int *got, loff_t endoff); |
| 838 | |
| 839 | /* for counting open files by mode */ |
| 840 | static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode) |
| 841 | { |
| 842 | ci->i_nr_by_mode[mode]++; |
| 843 | } |
| 844 | extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode); |
| 845 | |
| 846 | /* addr.c */ |
| 847 | extern const struct address_space_operations ceph_aops; |
| 848 | extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); |
| 849 | |
| 850 | /* file.c */ |
| 851 | extern const struct file_operations ceph_file_fops; |
| 852 | extern const struct address_space_operations ceph_aops; |
| 853 | extern int ceph_open(struct inode *inode, struct file *file); |
| 854 | extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry, |
| 855 | struct nameidata *nd, int mode, |
| 856 | int locked_dir); |
| 857 | extern int ceph_release(struct inode *inode, struct file *filp); |
| 858 | extern void ceph_release_page_vector(struct page **pages, int num_pages); |
| 859 | |
| 860 | /* dir.c */ |
| 861 | extern const struct file_operations ceph_dir_fops; |
| 862 | extern const struct inode_operations ceph_dir_iops; |
| 863 | extern struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops, |
| 864 | ceph_snapdir_dentry_ops; |
| 865 | |
| 866 | extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); |
| 867 | extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, |
| 868 | struct dentry *dentry, int err); |
| 869 | |
| 870 | extern void ceph_dentry_lru_add(struct dentry *dn); |
| 871 | extern void ceph_dentry_lru_touch(struct dentry *dn); |
| 872 | extern void ceph_dentry_lru_del(struct dentry *dn); |
| 873 | |
| 874 | /* |
| 875 | * our d_ops vary depending on whether the inode is live, |
| 876 | * snapshotted (read-only), or a virtual ".snap" directory. |
| 877 | */ |
| 878 | int ceph_init_dentry(struct dentry *dentry); |
| 879 | |
| 880 | |
| 881 | /* ioctl.c */ |
| 882 | extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| 883 | |
| 884 | /* export.c */ |
| 885 | extern const struct export_operations ceph_export_ops; |
| 886 | |
| 887 | /* debugfs.c */ |
| 888 | extern int ceph_debugfs_init(void); |
| 889 | extern void ceph_debugfs_cleanup(void); |
| 890 | extern int ceph_debugfs_client_init(struct ceph_client *client); |
| 891 | extern void ceph_debugfs_client_cleanup(struct ceph_client *client); |
| 892 | |
| 893 | static inline struct inode *get_dentry_parent_inode(struct dentry *dentry) |
| 894 | { |
| 895 | if (dentry && dentry->d_parent) |
| 896 | return dentry->d_parent->d_inode; |
| 897 | |
| 898 | return NULL; |
| 899 | } |
| 900 | |
| 901 | #endif /* _FS_CEPH_SUPER_H */ |