1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _FS_CEPH_SUPER_H 3 #define _FS_CEPH_SUPER_H 4 5 #include <linux/ceph/ceph_debug.h> 6 7 #include <asm/unaligned.h> 8 #include <linux/backing-dev.h> 9 #include <linux/completion.h> 10 #include <linux/exportfs.h> 11 #include <linux/fs.h> 12 #include <linux/mempool.h> 13 #include <linux/pagemap.h> 14 #include <linux/wait.h> 15 #include <linux/writeback.h> 16 #include <linux/slab.h> 17 #include <linux/posix_acl.h> 18 #include <linux/refcount.h> 19 #include <linux/security.h> 20 21 #include <linux/ceph/libceph.h> 22 23 #ifdef CONFIG_CEPH_FSCACHE 24 #include <linux/fscache.h> 25 #endif 26 27 /* large granularity for statfs utilization stats to facilitate 28 * large volume sizes on 32-bit machines. */ 29 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ 30 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 31 #define CEPH_4K_BLOCK_SHIFT 12 /* 4 KB */ 32 33 #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */ 34 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 35 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 36 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 37 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 38 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ 39 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ 40 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */ 41 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */ 42 #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ 43 #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */ 44 #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ 45 #define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache altogether */ 46 47 #define CEPH_MOUNT_OPT_DEFAULT \ 48 (CEPH_MOUNT_OPT_DCACHE | \ 49 CEPH_MOUNT_OPT_NOCOPYFROM | \ 50 CEPH_MOUNT_OPT_ASYNC_DIROPS) 51 52 #define ceph_set_mount_opt(fsc, opt) \ 53 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt 54 #define ceph_clear_mount_opt(fsc, opt) \ 55 (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt 56 #define ceph_test_mount_opt(fsc, opt) \ 57 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 58 59 /* max size of osd read request, limited by libceph */ 60 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN 61 /* osd has a configurable limitaion of max write size. 62 * CEPH_MSG_MAX_DATA_LEN should be small enough. */ 63 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN 64 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ 65 #define CEPH_MAX_READDIR_DEFAULT 1024 66 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 67 #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 68 69 /* 70 * Delay telling the MDS we no longer want caps, in case we reopen 71 * the file. Delay a minimum amount of time, even if we send a cap 72 * message for some other reason. Otherwise, take the oppotunity to 73 * update the mds to avoid sending another message later. 74 */ 75 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ 76 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ 77 78 struct ceph_mount_options { 79 unsigned int flags; 80 81 unsigned int wsize; /* max write size */ 82 unsigned int rsize; /* max read size */ 83 unsigned int rasize; /* max readahead */ 84 unsigned int congestion_kb; /* max writeback in flight */ 85 unsigned int caps_wanted_delay_min, caps_wanted_delay_max; 86 int caps_max; 87 unsigned int max_readdir; /* max readdir result (entries) */ 88 unsigned int max_readdir_bytes; /* max readdir result (bytes) */ 89 90 bool new_dev_syntax; 91 92 /* 93 * everything above this point can be memcmp'd; everything below 94 * is handled in compare_mount_options() 95 */ 96 97 char *snapdir_name; /* default ".snap" */ 98 char *mds_namespace; /* default NULL */ 99 char *server_path; /* default NULL (means "/") */ 100 char *fscache_uniq; /* default NULL */ 101 char *mon_addr; 102 }; 103 104 struct ceph_fs_client { 105 struct super_block *sb; 106 107 struct list_head metric_wakeup; 108 109 struct ceph_mount_options *mount_options; 110 struct ceph_client *client; 111 112 int mount_state; 113 114 bool blocklisted; 115 116 bool have_copy_from2; 117 118 u32 filp_gen; 119 loff_t max_file_size; 120 121 struct ceph_mds_client *mdsc; 122 123 atomic_long_t writeback_count; 124 bool write_congested; 125 126 struct workqueue_struct *inode_wq; 127 struct workqueue_struct *cap_wq; 128 129 #ifdef CONFIG_DEBUG_FS 130 struct dentry *debugfs_dentry_lru, *debugfs_caps; 131 struct dentry *debugfs_congestion_kb; 132 struct dentry *debugfs_bdi; 133 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 134 struct dentry *debugfs_status; 135 struct dentry *debugfs_mds_sessions; 136 struct dentry *debugfs_metrics_dir; 137 #endif 138 139 #ifdef CONFIG_CEPH_FSCACHE 140 struct fscache_volume *fscache; 141 #endif 142 }; 143 144 145 /* 146 * File i/o capability. This tracks shared state with the metadata 147 * server that allows us to cache or writeback attributes or to read 148 * and write data. For any given inode, we should have one or more 149 * capabilities, one issued by each metadata server, and our 150 * cumulative access is the OR of all issued capabilities. 151 * 152 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 153 * session capability lists. 154 */ 155 struct ceph_cap { 156 struct ceph_inode_info *ci; 157 struct rb_node ci_node; /* per-ci cap tree */ 158 struct ceph_mds_session *session; 159 struct list_head session_caps; /* per-session caplist */ 160 u64 cap_id; /* unique cap id (mds provided) */ 161 union { 162 /* in-use caps */ 163 struct { 164 int issued; /* latest, from the mds */ 165 int implemented; /* implemented superset of 166 issued (for revocation) */ 167 int mds; /* mds index for this cap */ 168 int mds_wanted; /* caps wanted from this mds */ 169 }; 170 /* caps to release */ 171 struct { 172 u64 cap_ino; 173 int queue_release; 174 }; 175 }; 176 u32 seq, issue_seq, mseq; 177 u32 cap_gen; /* active/stale cycle */ 178 unsigned long last_used; 179 struct list_head caps_item; 180 }; 181 182 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 183 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 184 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 185 186 struct ceph_cap_flush { 187 u64 tid; 188 int caps; 189 bool wake; /* wake up flush waiters when finish ? */ 190 bool is_capsnap; /* true means capsnap */ 191 struct list_head g_list; // global 192 struct list_head i_list; // per inode 193 }; 194 195 /* 196 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 197 * we first complete any in-process sync writes and writeback any dirty 198 * data before flushing the snapped state (tracked here) back to the MDS. 199 */ 200 struct ceph_cap_snap { 201 refcount_t nref; 202 struct list_head ci_item; 203 204 struct ceph_cap_flush cap_flush; 205 206 u64 follows; 207 int issued, dirty; 208 struct ceph_snap_context *context; 209 210 umode_t mode; 211 kuid_t uid; 212 kgid_t gid; 213 214 struct ceph_buffer *xattr_blob; 215 u64 xattr_version; 216 217 u64 size; 218 u64 change_attr; 219 struct timespec64 mtime, atime, ctime, btime; 220 u64 time_warp_seq; 221 u64 truncate_size; 222 u32 truncate_seq; 223 int writing; /* a sync write is still in progress */ 224 int dirty_pages; /* dirty pages awaiting writeback */ 225 bool inline_data; 226 bool need_flush; 227 }; 228 229 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 230 { 231 if (refcount_dec_and_test(&capsnap->nref)) { 232 if (capsnap->xattr_blob) 233 ceph_buffer_put(capsnap->xattr_blob); 234 kmem_cache_free(ceph_cap_snap_cachep, capsnap); 235 } 236 } 237 238 /* 239 * The frag tree describes how a directory is fragmented, potentially across 240 * multiple metadata servers. It is also used to indicate points where 241 * metadata authority is delegated, and whether/where metadata is replicated. 242 * 243 * A _leaf_ frag will be present in the i_fragtree IFF there is 244 * delegation info. That is, if mds >= 0 || ndist > 0. 245 */ 246 #define CEPH_MAX_DIRFRAG_REP 4 247 248 struct ceph_inode_frag { 249 struct rb_node node; 250 251 /* fragtree state */ 252 u32 frag; 253 int split_by; /* i.e. 2^(split_by) children */ 254 255 /* delegation and replication info */ 256 int mds; /* -1 if same authority as parent */ 257 int ndist; /* >0 if replicated */ 258 int dist[CEPH_MAX_DIRFRAG_REP]; 259 }; 260 261 /* 262 * We cache inode xattrs as an encoded blob until they are first used, 263 * at which point we parse them into an rbtree. 264 */ 265 struct ceph_inode_xattr { 266 struct rb_node node; 267 268 const char *name; 269 int name_len; 270 const char *val; 271 int val_len; 272 int dirty; 273 274 int should_free_name; 275 int should_free_val; 276 }; 277 278 /* 279 * Ceph dentry state 280 */ 281 struct ceph_dentry_info { 282 struct dentry *dentry; 283 struct ceph_mds_session *lease_session; 284 struct list_head lease_list; 285 unsigned flags; 286 int lease_shared_gen; 287 u32 lease_gen; 288 u32 lease_seq; 289 unsigned long lease_renew_after, lease_renew_from; 290 unsigned long time; 291 u64 offset; 292 }; 293 294 #define CEPH_DENTRY_REFERENCED 1 295 #define CEPH_DENTRY_LEASE_LIST 2 296 #define CEPH_DENTRY_SHRINK_LIST 4 297 #define CEPH_DENTRY_PRIMARY_LINK 8 298 299 struct ceph_inode_xattrs_info { 300 /* 301 * (still encoded) xattr blob. we avoid the overhead of parsing 302 * this until someone actually calls getxattr, etc. 303 * 304 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 305 * NULL means we don't know. 306 */ 307 struct ceph_buffer *blob, *prealloc_blob; 308 309 struct rb_root index; 310 bool dirty; 311 int count; 312 int names_size; 313 int vals_size; 314 u64 version, index_version; 315 }; 316 317 /* 318 * Ceph inode. 319 */ 320 struct ceph_inode_info { 321 struct ceph_vino i_vino; /* ceph ino + snap */ 322 323 spinlock_t i_ceph_lock; 324 325 u64 i_version; 326 u64 i_inline_version; 327 u32 i_time_warp_seq; 328 329 unsigned long i_ceph_flags; 330 atomic64_t i_release_count; 331 atomic64_t i_ordered_count; 332 atomic64_t i_complete_seq[2]; 333 334 struct ceph_dir_layout i_dir_layout; 335 struct ceph_file_layout i_layout; 336 struct ceph_file_layout i_cached_layout; // for async creates 337 char *i_symlink; 338 339 /* for dirs */ 340 struct timespec64 i_rctime; 341 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps; 342 u64 i_files, i_subdirs; 343 344 /* quotas */ 345 u64 i_max_bytes, i_max_files; 346 347 s32 i_dir_pin; 348 349 struct rb_root i_fragtree; 350 int i_fragtree_nsplits; 351 struct mutex i_fragtree_mutex; 352 353 struct ceph_inode_xattrs_info i_xattrs; 354 355 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 356 * s_mutex. */ 357 struct rb_root i_caps; /* cap list */ 358 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 359 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 360 361 /* 362 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 363 * is protected by the mdsc->cap_dirty_lock, but each individual item 364 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 365 * requires the mdsc->cap_dirty_lock. List presence for an item can 366 * be tested under the i_ceph_lock. Changing anything requires both. 367 */ 368 struct list_head i_dirty_item; 369 370 /* 371 * Link to session's s_cap_flushing list. Protected in a similar 372 * fashion to i_dirty_item, but also by the s_mutex for changes. The 373 * s_cap_flushing list can be walked while holding either the s_mutex 374 * or msdc->cap_dirty_lock. List presence can also be checked while 375 * holding the i_ceph_lock for this inode. 376 */ 377 struct list_head i_flushing_item; 378 379 /* we need to track cap writeback on a per-cap-bit basis, to allow 380 * overlapping, pipelined cap flushes to the mds. we can probably 381 * reduce the tid to 8 bits if we're concerned about inode size. */ 382 struct ceph_cap_flush *i_prealloc_cap_flush; 383 struct list_head i_cap_flush_list; 384 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 385 unsigned long i_hold_caps_max; /* jiffies */ 386 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 387 struct ceph_cap_reservation i_cap_migration_resv; 388 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 389 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 390 dirty|flushing caps */ 391 unsigned i_snap_caps; /* cap bits for snapped files */ 392 393 unsigned long i_last_rd; 394 unsigned long i_last_wr; 395 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 396 397 struct mutex i_truncate_mutex; 398 u32 i_truncate_seq; /* last truncate to smaller size */ 399 u64 i_truncate_size; /* and the size we last truncated down to */ 400 int i_truncate_pending; /* still need to call vmtruncate */ 401 402 u64 i_max_size; /* max file size authorized by mds */ 403 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 404 u64 i_wanted_max_size; /* offset we'd like to write too */ 405 u64 i_requested_max_size; /* max_size we've requested */ 406 407 /* held references to caps */ 408 int i_pin_ref; 409 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 410 int i_wrbuffer_ref, i_wrbuffer_ref_head; 411 atomic_t i_filelock_ref; 412 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 413 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 414 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 415 416 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 417 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 418 spinlock_t i_unsafe_lock; 419 420 union { 421 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 422 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 423 }; 424 struct list_head i_snap_realm_item; 425 struct list_head i_snap_flush_item; 426 struct timespec64 i_btime; 427 struct timespec64 i_snap_btime; 428 429 struct work_struct i_work; 430 unsigned long i_work_mask; 431 432 #ifdef CONFIG_CEPH_FSCACHE 433 struct fscache_cookie *fscache; 434 #endif 435 struct inode vfs_inode; /* at end */ 436 }; 437 438 static inline struct ceph_inode_info * 439 ceph_inode(const struct inode *inode) 440 { 441 return container_of(inode, struct ceph_inode_info, vfs_inode); 442 } 443 444 static inline struct ceph_fs_client * 445 ceph_inode_to_client(const struct inode *inode) 446 { 447 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 448 } 449 450 static inline struct ceph_fs_client * 451 ceph_sb_to_client(const struct super_block *sb) 452 { 453 return (struct ceph_fs_client *)sb->s_fs_info; 454 } 455 456 static inline struct ceph_mds_client * 457 ceph_sb_to_mdsc(const struct super_block *sb) 458 { 459 return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc; 460 } 461 462 static inline struct ceph_vino 463 ceph_vino(const struct inode *inode) 464 { 465 return ceph_inode(inode)->i_vino; 466 } 467 468 static inline u32 ceph_ino_to_ino32(u64 vino) 469 { 470 u32 ino = vino & 0xffffffff; 471 ino ^= vino >> 32; 472 if (!ino) 473 ino = 2; 474 return ino; 475 } 476 477 /* 478 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 479 * some arches. We generally do not use this value inside the ceph driver, but 480 * we do want to set it to something, so that generic vfs code has an 481 * appropriate value for tracepoints and the like. 482 */ 483 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 484 { 485 if (sizeof(ino_t) == sizeof(u32)) 486 return ceph_ino_to_ino32(vino.ino); 487 return (ino_t)vino.ino; 488 } 489 490 /* for printf-style formatting */ 491 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 492 493 static inline u64 ceph_ino(struct inode *inode) 494 { 495 return ceph_inode(inode)->i_vino.ino; 496 } 497 498 static inline u64 ceph_snap(struct inode *inode) 499 { 500 return ceph_inode(inode)->i_vino.snap; 501 } 502 503 /** 504 * ceph_present_ino - format an inode number for presentation to userland 505 * @sb: superblock where the inode lives 506 * @ino: inode number to (possibly) convert 507 * 508 * If the user mounted with the ino32 option, then the 64-bit value needs 509 * to be converted to something that can fit inside 32 bits. Note that 510 * internal kernel code never uses this value, so this is entirely for 511 * userland consumption. 512 */ 513 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 514 { 515 if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))) 516 return ceph_ino_to_ino32(ino); 517 return ino; 518 } 519 520 static inline u64 ceph_present_inode(struct inode *inode) 521 { 522 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 523 } 524 525 static inline int ceph_ino_compare(struct inode *inode, void *data) 526 { 527 struct ceph_vino *pvino = (struct ceph_vino *)data; 528 struct ceph_inode_info *ci = ceph_inode(inode); 529 return ci->i_vino.ino == pvino->ino && 530 ci->i_vino.snap == pvino->snap; 531 } 532 533 /* 534 * The MDS reserves a set of inodes for its own usage. These should never 535 * be accessible by clients, and so the MDS has no reason to ever hand these 536 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE. 537 * 538 * These come from src/mds/mdstypes.h in the ceph sources. 539 */ 540 #define CEPH_MAX_MDS 0x100 541 #define CEPH_NUM_STRAY 10 542 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS) 543 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS) 544 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY)) 545 546 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino) 547 { 548 if (vino.ino >= CEPH_INO_SYSTEM_BASE || 549 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET) 550 return false; 551 552 /* Don't warn on mdsdirs */ 553 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET, 554 "Attempt to access reserved inode number 0x%llx", 555 vino.ino); 556 return true; 557 } 558 559 static inline struct inode *ceph_find_inode(struct super_block *sb, 560 struct ceph_vino vino) 561 { 562 if (ceph_vino_is_reserved(vino)) 563 return NULL; 564 565 /* 566 * NB: The hashval will be run through the fs/inode.c hash function 567 * anyway, so there is no need to squash the inode number down to 568 * 32-bits first. Just use low-order bits on arches with 32-bit long. 569 */ 570 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 571 } 572 573 574 /* 575 * Ceph inode. 576 */ 577 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ 578 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ 579 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ 580 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ 581 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ 582 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ 583 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ 584 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ 585 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ 586 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ 587 #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */ 588 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 589 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) 590 #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */ 591 592 /* 593 * Masks of ceph inode work. 594 */ 595 #define CEPH_I_WORK_WRITEBACK 0 596 #define CEPH_I_WORK_INVALIDATE_PAGES 1 597 #define CEPH_I_WORK_VMTRUNCATE 2 598 #define CEPH_I_WORK_CHECK_CAPS 3 599 #define CEPH_I_WORK_FLUSH_SNAPS 4 600 601 /* 602 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 603 * and then clear it when they start succeeding. Note that we do a lockless 604 * check first, and only take the lock if it looks like it needs to be changed. 605 * The write submission code just takes this as a hint, so we're not too 606 * worried if a few slip through in either direction. 607 */ 608 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 609 { 610 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 611 spin_lock(&ci->i_ceph_lock); 612 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 613 spin_unlock(&ci->i_ceph_lock); 614 } 615 } 616 617 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 618 { 619 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 620 spin_lock(&ci->i_ceph_lock); 621 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 622 spin_unlock(&ci->i_ceph_lock); 623 } 624 } 625 626 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 627 long long release_count, 628 long long ordered_count) 629 { 630 /* 631 * Makes sure operations that setup readdir cache (update page 632 * cache and i_size) are strongly ordered w.r.t. the following 633 * atomic64_set() operations. 634 */ 635 smp_mb(); 636 atomic64_set(&ci->i_complete_seq[0], release_count); 637 atomic64_set(&ci->i_complete_seq[1], ordered_count); 638 } 639 640 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 641 { 642 atomic64_inc(&ci->i_release_count); 643 } 644 645 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 646 { 647 atomic64_inc(&ci->i_ordered_count); 648 } 649 650 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 651 { 652 return atomic64_read(&ci->i_complete_seq[0]) == 653 atomic64_read(&ci->i_release_count); 654 } 655 656 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 657 { 658 return atomic64_read(&ci->i_complete_seq[0]) == 659 atomic64_read(&ci->i_release_count) && 660 atomic64_read(&ci->i_complete_seq[1]) == 661 atomic64_read(&ci->i_ordered_count); 662 } 663 664 static inline void ceph_dir_clear_complete(struct inode *inode) 665 { 666 __ceph_dir_clear_complete(ceph_inode(inode)); 667 } 668 669 static inline void ceph_dir_clear_ordered(struct inode *inode) 670 { 671 __ceph_dir_clear_ordered(ceph_inode(inode)); 672 } 673 674 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 675 { 676 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 677 smp_rmb(); 678 return ret; 679 } 680 681 /* find a specific frag @f */ 682 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 683 u32 f); 684 685 /* 686 * choose fragment for value @v. copy frag content to pfrag, if leaf 687 * exists 688 */ 689 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 690 struct ceph_inode_frag *pfrag, 691 int *found); 692 693 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 694 { 695 return (struct ceph_dentry_info *)dentry->d_fsdata; 696 } 697 698 /* 699 * caps helpers 700 */ 701 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 702 { 703 return !RB_EMPTY_ROOT(&ci->i_caps); 704 } 705 706 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 707 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 708 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 709 int t); 710 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 711 struct ceph_cap *cap); 712 713 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 714 { 715 int issued; 716 spin_lock(&ci->i_ceph_lock); 717 issued = __ceph_caps_issued(ci, NULL); 718 spin_unlock(&ci->i_ceph_lock); 719 return issued; 720 } 721 722 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 723 int mask, int touch) 724 { 725 int r; 726 spin_lock(&ci->i_ceph_lock); 727 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 728 spin_unlock(&ci->i_ceph_lock); 729 return r; 730 } 731 732 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 733 { 734 return ci->i_dirty_caps | ci->i_flushing_caps; 735 } 736 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 737 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 738 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 739 struct ceph_cap_flush **pcf); 740 741 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 742 struct ceph_cap *ocap, int mask); 743 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 744 extern int __ceph_caps_used(struct ceph_inode_info *ci); 745 746 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 747 { 748 return ci->i_nr_by_mode[0]; 749 } 750 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 751 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 752 753 /* what the mds thinks we want */ 754 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 755 756 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 757 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 758 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 759 struct ceph_mount_options *fsopt); 760 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 761 struct ceph_cap_reservation *ctx, int need); 762 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 763 struct ceph_cap_reservation *ctx); 764 extern void ceph_reservation_status(struct ceph_fs_client *client, 765 int *total, int *avail, int *used, 766 int *reserved, int *min); 767 768 769 770 /* 771 * we keep buffered readdir results attached to file->private_data 772 */ 773 #define CEPH_F_SYNC 1 774 #define CEPH_F_ATEND 2 775 776 struct ceph_file_info { 777 short fmode; /* initialized on open */ 778 short flags; /* CEPH_F_* */ 779 780 spinlock_t rw_contexts_lock; 781 struct list_head rw_contexts; 782 783 u32 filp_gen; 784 atomic_t num_locks; 785 }; 786 787 struct ceph_dir_file_info { 788 struct ceph_file_info file_info; 789 790 /* readdir: position within the dir */ 791 u32 frag; 792 struct ceph_mds_request *last_readdir; 793 794 /* readdir: position within a frag */ 795 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 796 char *last_name; /* last entry in previous chunk */ 797 long long dir_release_count; 798 long long dir_ordered_count; 799 int readdir_cache_idx; 800 801 /* used for -o dirstat read() on directory thing */ 802 char *dir_info; 803 int dir_info_len; 804 }; 805 806 struct ceph_rw_context { 807 struct list_head list; 808 struct task_struct *thread; 809 int caps; 810 }; 811 812 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 813 struct ceph_rw_context _name = { \ 814 .thread = current, \ 815 .caps = _caps, \ 816 } 817 818 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 819 struct ceph_rw_context *ctx) 820 { 821 spin_lock(&cf->rw_contexts_lock); 822 list_add(&ctx->list, &cf->rw_contexts); 823 spin_unlock(&cf->rw_contexts_lock); 824 } 825 826 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 827 struct ceph_rw_context *ctx) 828 { 829 spin_lock(&cf->rw_contexts_lock); 830 list_del(&ctx->list); 831 spin_unlock(&cf->rw_contexts_lock); 832 } 833 834 static inline struct ceph_rw_context* 835 ceph_find_rw_context(struct ceph_file_info *cf) 836 { 837 struct ceph_rw_context *ctx, *found = NULL; 838 spin_lock(&cf->rw_contexts_lock); 839 list_for_each_entry(ctx, &cf->rw_contexts, list) { 840 if (ctx->thread == current) { 841 found = ctx; 842 break; 843 } 844 } 845 spin_unlock(&cf->rw_contexts_lock); 846 return found; 847 } 848 849 struct ceph_readdir_cache_control { 850 struct page *page; 851 struct dentry **dentries; 852 int index; 853 }; 854 855 /* 856 * A "snap realm" describes a subset of the file hierarchy sharing 857 * the same set of snapshots that apply to it. The realms themselves 858 * are organized into a hierarchy, such that children inherit (some of) 859 * the snapshots of their parents. 860 * 861 * All inodes within the realm that have capabilities are linked into a 862 * per-realm list. 863 */ 864 struct ceph_snap_realm { 865 u64 ino; 866 struct inode *inode; 867 atomic_t nref; 868 struct rb_node node; 869 870 u64 created, seq; 871 u64 parent_ino; 872 u64 parent_since; /* snapid when our current parent became so */ 873 874 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 875 u32 num_prior_parent_snaps; /* had prior to parent_since */ 876 u64 *snaps; /* snaps specific to this realm */ 877 u32 num_snaps; 878 879 struct ceph_snap_realm *parent; 880 struct list_head children; /* list of child realms */ 881 struct list_head child_item; 882 883 struct list_head empty_item; /* if i have ref==0 */ 884 885 struct list_head dirty_item; /* if realm needs new context */ 886 887 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */ 888 889 /* the current set of snaps for this realm */ 890 struct ceph_snap_context *cached_context; 891 892 struct list_head inodes_with_caps; 893 spinlock_t inodes_with_caps_lock; 894 }; 895 896 static inline int default_congestion_kb(void) 897 { 898 int congestion_kb; 899 900 /* 901 * Copied from NFS 902 * 903 * congestion size, scale with available memory. 904 * 905 * 64MB: 8192k 906 * 128MB: 11585k 907 * 256MB: 16384k 908 * 512MB: 23170k 909 * 1GB: 32768k 910 * 2GB: 46340k 911 * 4GB: 65536k 912 * 8GB: 92681k 913 * 16GB: 131072k 914 * 915 * This allows larger machines to have larger/more transfers. 916 * Limit the default to 256M 917 */ 918 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 919 if (congestion_kb > 256*1024) 920 congestion_kb = 256*1024; 921 922 return congestion_kb; 923 } 924 925 926 /* super.c */ 927 extern int ceph_force_reconnect(struct super_block *sb); 928 /* snap.c */ 929 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 930 u64 ino); 931 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 932 struct ceph_snap_realm *realm); 933 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 934 struct ceph_snap_realm *realm); 935 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 936 void *p, void *e, bool deletion, 937 struct ceph_snap_realm **realm_ret); 938 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm); 939 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 940 struct ceph_mds_session *session, 941 struct ceph_msg *msg); 942 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 943 struct ceph_cap_snap *capsnap); 944 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc); 945 946 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 947 u64 snap); 948 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 949 struct ceph_snapid_map *sm); 950 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 951 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 952 void ceph_umount_begin(struct super_block *sb); 953 954 955 /* 956 * a cap_snap is "pending" if it is still awaiting an in-progress 957 * sync write (that may/may not still update size, mtime, etc.). 958 */ 959 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 960 { 961 return !list_empty(&ci->i_cap_snaps) && 962 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 963 ci_item)->writing; 964 } 965 966 /* inode.c */ 967 struct ceph_mds_reply_info_in; 968 struct ceph_mds_reply_dirfrag; 969 970 extern const struct inode_operations ceph_file_iops; 971 972 extern struct inode *ceph_alloc_inode(struct super_block *sb); 973 extern void ceph_evict_inode(struct inode *inode); 974 extern void ceph_free_inode(struct inode *inode); 975 976 extern struct inode *ceph_get_inode(struct super_block *sb, 977 struct ceph_vino vino); 978 extern struct inode *ceph_get_snapdir(struct inode *parent); 979 extern int ceph_fill_file_size(struct inode *inode, int issued, 980 u32 truncate_seq, u64 truncate_size, u64 size); 981 extern void ceph_fill_file_time(struct inode *inode, int issued, 982 u64 time_warp_seq, struct timespec64 *ctime, 983 struct timespec64 *mtime, 984 struct timespec64 *atime); 985 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 986 struct ceph_mds_reply_info_in *iinfo, 987 struct ceph_mds_reply_dirfrag *dirinfo, 988 struct ceph_mds_session *session, int cap_fmode, 989 struct ceph_cap_reservation *caps_reservation); 990 extern int ceph_fill_trace(struct super_block *sb, 991 struct ceph_mds_request *req); 992 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 993 struct ceph_mds_session *session); 994 995 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 996 997 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 998 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 999 1000 void ceph_queue_inode_work(struct inode *inode, int work_bit); 1001 1002 static inline void ceph_queue_vmtruncate(struct inode *inode) 1003 { 1004 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); 1005 } 1006 1007 static inline void ceph_queue_invalidate(struct inode *inode) 1008 { 1009 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); 1010 } 1011 1012 static inline void ceph_queue_writeback(struct inode *inode) 1013 { 1014 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); 1015 } 1016 1017 static inline void ceph_queue_check_caps(struct inode *inode) 1018 { 1019 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); 1020 } 1021 1022 static inline void ceph_queue_flush_snaps(struct inode *inode) 1023 { 1024 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); 1025 } 1026 1027 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 1028 int mask, bool force); 1029 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 1030 { 1031 return __ceph_do_getattr(inode, NULL, mask, force); 1032 } 1033 extern int ceph_permission(struct user_namespace *mnt_userns, 1034 struct inode *inode, int mask); 1035 extern int __ceph_setattr(struct inode *inode, struct iattr *attr); 1036 extern int ceph_setattr(struct user_namespace *mnt_userns, 1037 struct dentry *dentry, struct iattr *attr); 1038 extern int ceph_getattr(struct user_namespace *mnt_userns, 1039 const struct path *path, struct kstat *stat, 1040 u32 request_mask, unsigned int flags); 1041 void ceph_inode_shutdown(struct inode *inode); 1042 1043 static inline bool ceph_inode_is_shutdown(struct inode *inode) 1044 { 1045 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags); 1046 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 1047 int state = READ_ONCE(fsc->mount_state); 1048 1049 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN; 1050 } 1051 1052 /* xattr.c */ 1053 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 1054 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size); 1055 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 1056 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 1057 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 1058 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 1059 extern const struct xattr_handler *ceph_xattr_handlers[]; 1060 1061 struct ceph_acl_sec_ctx { 1062 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1063 void *default_acl; 1064 void *acl; 1065 #endif 1066 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1067 void *sec_ctx; 1068 u32 sec_ctxlen; 1069 #endif 1070 struct ceph_pagelist *pagelist; 1071 }; 1072 1073 #ifdef CONFIG_SECURITY 1074 extern bool ceph_security_xattr_deadlock(struct inode *in); 1075 extern bool ceph_security_xattr_wanted(struct inode *in); 1076 #else 1077 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1078 { 1079 return false; 1080 } 1081 static inline bool ceph_security_xattr_wanted(struct inode *in) 1082 { 1083 return false; 1084 } 1085 #endif 1086 1087 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1088 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1089 struct ceph_acl_sec_ctx *ctx); 1090 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1091 { 1092 security_inode_invalidate_secctx(inode); 1093 } 1094 #else 1095 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1096 struct ceph_acl_sec_ctx *ctx) 1097 { 1098 return 0; 1099 } 1100 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1101 { 1102 } 1103 #endif 1104 1105 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1106 1107 /* acl.c */ 1108 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1109 1110 struct posix_acl *ceph_get_acl(struct inode *, int, bool); 1111 int ceph_set_acl(struct user_namespace *mnt_userns, 1112 struct inode *inode, struct posix_acl *acl, int type); 1113 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1114 struct ceph_acl_sec_ctx *as_ctx); 1115 void ceph_init_inode_acls(struct inode *inode, 1116 struct ceph_acl_sec_ctx *as_ctx); 1117 1118 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1119 { 1120 forget_all_cached_acls(inode); 1121 } 1122 1123 #else 1124 1125 #define ceph_get_acl NULL 1126 #define ceph_set_acl NULL 1127 1128 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1129 struct ceph_acl_sec_ctx *as_ctx) 1130 { 1131 return 0; 1132 } 1133 static inline void ceph_init_inode_acls(struct inode *inode, 1134 struct ceph_acl_sec_ctx *as_ctx) 1135 { 1136 } 1137 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 1138 { 1139 return 0; 1140 } 1141 1142 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1143 { 1144 } 1145 1146 #endif 1147 1148 /* caps.c */ 1149 extern const char *ceph_cap_string(int c); 1150 extern void ceph_handle_caps(struct ceph_mds_session *session, 1151 struct ceph_msg *msg); 1152 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1153 struct ceph_cap_reservation *ctx); 1154 extern void ceph_add_cap(struct inode *inode, 1155 struct ceph_mds_session *session, u64 cap_id, 1156 unsigned issued, unsigned wanted, 1157 unsigned cap, unsigned seq, u64 realmino, int flags, 1158 struct ceph_cap **new_cap); 1159 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1160 extern void ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1161 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1162 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1163 struct ceph_cap *cap); 1164 extern int ceph_is_any_caps(struct inode *inode); 1165 1166 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1167 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1168 int datasync); 1169 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1170 struct ceph_mds_session *session); 1171 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1172 struct ceph_mds_session *session); 1173 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1174 struct ceph_inode_info *ci); 1175 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1176 int mds); 1177 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1178 bool snap_rwsem_locked); 1179 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1180 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1181 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); 1182 extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, 1183 int had); 1184 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1185 struct ceph_snap_context *snapc); 1186 extern void __ceph_remove_capsnap(struct inode *inode, 1187 struct ceph_cap_snap *capsnap, 1188 bool *wake_ci, bool *wake_mdsc); 1189 extern void ceph_remove_capsnap(struct inode *inode, 1190 struct ceph_cap_snap *capsnap, 1191 bool *wake_ci, bool *wake_mdsc); 1192 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1193 struct ceph_mds_session **psession); 1194 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1195 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 1196 struct ceph_mds_session *session); 1197 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1198 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1199 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1200 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1201 int mds, int drop, int unless, int force); 1202 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1203 struct inode *dir, 1204 int mds, int drop, int unless); 1205 1206 extern int ceph_get_caps(struct file *filp, int need, int want, 1207 loff_t endoff, int *got); 1208 extern int ceph_try_get_caps(struct inode *inode, 1209 int need, int want, bool nonblock, int *got); 1210 1211 /* for counting open files by mode */ 1212 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1213 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1214 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1215 struct ceph_mds_client *mdsc, int fmode); 1216 1217 /* addr.c */ 1218 extern const struct address_space_operations ceph_aops; 1219 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 1220 extern int ceph_uninline_data(struct file *file); 1221 extern int ceph_pool_perm_check(struct inode *inode, int need); 1222 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1223 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); 1224 1225 /* file.c */ 1226 extern const struct file_operations ceph_file_fops; 1227 1228 extern int ceph_renew_caps(struct inode *inode, int fmode); 1229 extern int ceph_open(struct inode *inode, struct file *file); 1230 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1231 struct file *file, unsigned flags, umode_t mode); 1232 extern int ceph_release(struct inode *inode, struct file *filp); 1233 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1234 char *data, size_t len); 1235 1236 /* dir.c */ 1237 extern const struct file_operations ceph_dir_fops; 1238 extern const struct file_operations ceph_snapdir_fops; 1239 extern const struct inode_operations ceph_dir_iops; 1240 extern const struct inode_operations ceph_snapdir_iops; 1241 extern const struct dentry_operations ceph_dentry_ops; 1242 1243 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1244 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1245 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req, 1246 struct dentry *dentry); 1247 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1248 struct dentry *dentry, int err); 1249 1250 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1251 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1252 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1253 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1254 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1255 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1256 1257 /* ioctl.c */ 1258 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1259 1260 /* export.c */ 1261 extern const struct export_operations ceph_export_ops; 1262 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1263 1264 /* locks.c */ 1265 extern __init void ceph_flock_init(void); 1266 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1267 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1268 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1269 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1270 struct ceph_filelock *flocks, 1271 int num_fcntl_locks, 1272 int num_flock_locks); 1273 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1274 struct ceph_pagelist *pagelist, 1275 int num_fcntl_locks, int num_flock_locks); 1276 1277 /* debugfs.c */ 1278 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1279 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1280 1281 /* quota.c */ 1282 static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci) 1283 { 1284 return ci->i_max_files || ci->i_max_bytes; 1285 } 1286 1287 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1288 1289 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1290 u64 max_bytes, u64 max_files) 1291 { 1292 bool had_quota, has_quota; 1293 had_quota = __ceph_has_any_quota(ci); 1294 ci->i_max_bytes = max_bytes; 1295 ci->i_max_files = max_files; 1296 has_quota = __ceph_has_any_quota(ci); 1297 1298 if (had_quota != has_quota) 1299 ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota); 1300 } 1301 1302 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1303 struct ceph_mds_session *session, 1304 struct ceph_msg *msg); 1305 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1306 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1307 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1308 loff_t newlen); 1309 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1310 loff_t newlen); 1311 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1312 struct kstatfs *buf); 1313 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1314 1315 #endif /* _FS_CEPH_SUPER_H */ 1316