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 /* f_type in struct statfs */ 28 #define CEPH_SUPER_MAGIC 0x00c36400 29 30 /* large granularity for statfs utilization stats to facilitate 31 * large volume sizes on 32-bit machines. */ 32 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ 33 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 34 35 #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */ 36 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 37 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 38 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 39 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 40 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ 41 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ 42 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */ 43 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */ 44 #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ 45 #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */ 46 #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ 47 48 #define CEPH_MOUNT_OPT_DEFAULT \ 49 (CEPH_MOUNT_OPT_DCACHE | \ 50 CEPH_MOUNT_OPT_NOCOPYFROM) 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 /* 91 * everything above this point can be memcmp'd; everything below 92 * is handled in compare_mount_options() 93 */ 94 95 char *snapdir_name; /* default ".snap" */ 96 char *mds_namespace; /* default NULL */ 97 char *server_path; /* default NULL (means "/") */ 98 char *fscache_uniq; /* default NULL */ 99 }; 100 101 struct ceph_fs_client { 102 struct super_block *sb; 103 104 struct list_head metric_wakeup; 105 106 struct ceph_mount_options *mount_options; 107 struct ceph_client *client; 108 109 int mount_state; 110 111 bool blocklisted; 112 113 bool have_copy_from2; 114 115 u32 filp_gen; 116 loff_t max_file_size; 117 118 struct ceph_mds_client *mdsc; 119 120 atomic_long_t writeback_count; 121 122 struct workqueue_struct *inode_wq; 123 struct workqueue_struct *cap_wq; 124 125 #ifdef CONFIG_DEBUG_FS 126 struct dentry *debugfs_dentry_lru, *debugfs_caps; 127 struct dentry *debugfs_congestion_kb; 128 struct dentry *debugfs_bdi; 129 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 130 struct dentry *debugfs_metric; 131 struct dentry *debugfs_status; 132 struct dentry *debugfs_mds_sessions; 133 #endif 134 135 #ifdef CONFIG_CEPH_FSCACHE 136 struct fscache_cookie *fscache; 137 #endif 138 }; 139 140 141 /* 142 * File i/o capability. This tracks shared state with the metadata 143 * server that allows us to cache or writeback attributes or to read 144 * and write data. For any given inode, we should have one or more 145 * capabilities, one issued by each metadata server, and our 146 * cumulative access is the OR of all issued capabilities. 147 * 148 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 149 * session capability lists. 150 */ 151 struct ceph_cap { 152 struct ceph_inode_info *ci; 153 struct rb_node ci_node; /* per-ci cap tree */ 154 struct ceph_mds_session *session; 155 struct list_head session_caps; /* per-session caplist */ 156 u64 cap_id; /* unique cap id (mds provided) */ 157 union { 158 /* in-use caps */ 159 struct { 160 int issued; /* latest, from the mds */ 161 int implemented; /* implemented superset of 162 issued (for revocation) */ 163 int mds; /* mds index for this cap */ 164 int mds_wanted; /* caps wanted from this mds */ 165 }; 166 /* caps to release */ 167 struct { 168 u64 cap_ino; 169 int queue_release; 170 }; 171 }; 172 u32 seq, issue_seq, mseq; 173 u32 cap_gen; /* active/stale cycle */ 174 unsigned long last_used; 175 struct list_head caps_item; 176 }; 177 178 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 179 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 180 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 181 182 struct ceph_cap_flush { 183 u64 tid; 184 int caps; /* 0 means capsnap */ 185 bool wake; /* wake up flush waiters when finish ? */ 186 struct list_head g_list; // global 187 struct list_head i_list; // per inode 188 }; 189 190 /* 191 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 192 * we first complete any in-process sync writes and writeback any dirty 193 * data before flushing the snapped state (tracked here) back to the MDS. 194 */ 195 struct ceph_cap_snap { 196 refcount_t nref; 197 struct list_head ci_item; 198 199 struct ceph_cap_flush cap_flush; 200 201 u64 follows; 202 int issued, dirty; 203 struct ceph_snap_context *context; 204 205 umode_t mode; 206 kuid_t uid; 207 kgid_t gid; 208 209 struct ceph_buffer *xattr_blob; 210 u64 xattr_version; 211 212 u64 size; 213 u64 change_attr; 214 struct timespec64 mtime, atime, ctime, btime; 215 u64 time_warp_seq; 216 u64 truncate_size; 217 u32 truncate_seq; 218 int writing; /* a sync write is still in progress */ 219 int dirty_pages; /* dirty pages awaiting writeback */ 220 bool inline_data; 221 bool need_flush; 222 }; 223 224 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 225 { 226 if (refcount_dec_and_test(&capsnap->nref)) { 227 if (capsnap->xattr_blob) 228 ceph_buffer_put(capsnap->xattr_blob); 229 kfree(capsnap); 230 } 231 } 232 233 /* 234 * The frag tree describes how a directory is fragmented, potentially across 235 * multiple metadata servers. It is also used to indicate points where 236 * metadata authority is delegated, and whether/where metadata is replicated. 237 * 238 * A _leaf_ frag will be present in the i_fragtree IFF there is 239 * delegation info. That is, if mds >= 0 || ndist > 0. 240 */ 241 #define CEPH_MAX_DIRFRAG_REP 4 242 243 struct ceph_inode_frag { 244 struct rb_node node; 245 246 /* fragtree state */ 247 u32 frag; 248 int split_by; /* i.e. 2^(split_by) children */ 249 250 /* delegation and replication info */ 251 int mds; /* -1 if same authority as parent */ 252 int ndist; /* >0 if replicated */ 253 int dist[CEPH_MAX_DIRFRAG_REP]; 254 }; 255 256 /* 257 * We cache inode xattrs as an encoded blob until they are first used, 258 * at which point we parse them into an rbtree. 259 */ 260 struct ceph_inode_xattr { 261 struct rb_node node; 262 263 const char *name; 264 int name_len; 265 const char *val; 266 int val_len; 267 int dirty; 268 269 int should_free_name; 270 int should_free_val; 271 }; 272 273 /* 274 * Ceph dentry state 275 */ 276 struct ceph_dentry_info { 277 struct dentry *dentry; 278 struct ceph_mds_session *lease_session; 279 struct list_head lease_list; 280 unsigned flags; 281 int lease_shared_gen; 282 u32 lease_gen; 283 u32 lease_seq; 284 unsigned long lease_renew_after, lease_renew_from; 285 unsigned long time; 286 u64 offset; 287 }; 288 289 #define CEPH_DENTRY_REFERENCED 1 290 #define CEPH_DENTRY_LEASE_LIST 2 291 #define CEPH_DENTRY_SHRINK_LIST 4 292 #define CEPH_DENTRY_PRIMARY_LINK 8 293 294 struct ceph_inode_xattrs_info { 295 /* 296 * (still encoded) xattr blob. we avoid the overhead of parsing 297 * this until someone actually calls getxattr, etc. 298 * 299 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 300 * NULL means we don't know. 301 */ 302 struct ceph_buffer *blob, *prealloc_blob; 303 304 struct rb_root index; 305 bool dirty; 306 int count; 307 int names_size; 308 int vals_size; 309 u64 version, index_version; 310 }; 311 312 /* 313 * Ceph inode. 314 */ 315 struct ceph_inode_info { 316 struct ceph_vino i_vino; /* ceph ino + snap */ 317 318 spinlock_t i_ceph_lock; 319 320 u64 i_version; 321 u64 i_inline_version; 322 u32 i_time_warp_seq; 323 324 unsigned long i_ceph_flags; 325 atomic64_t i_release_count; 326 atomic64_t i_ordered_count; 327 atomic64_t i_complete_seq[2]; 328 329 struct ceph_dir_layout i_dir_layout; 330 struct ceph_file_layout i_layout; 331 struct ceph_file_layout i_cached_layout; // for async creates 332 char *i_symlink; 333 334 /* for dirs */ 335 struct timespec64 i_rctime; 336 u64 i_rbytes, i_rfiles, i_rsubdirs; 337 u64 i_files, i_subdirs; 338 339 /* quotas */ 340 u64 i_max_bytes, i_max_files; 341 342 s32 i_dir_pin; 343 344 struct rb_root i_fragtree; 345 int i_fragtree_nsplits; 346 struct mutex i_fragtree_mutex; 347 348 struct ceph_inode_xattrs_info i_xattrs; 349 350 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 351 * s_mutex. */ 352 struct rb_root i_caps; /* cap list */ 353 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 354 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 355 356 /* 357 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 358 * is protected by the mdsc->cap_dirty_lock, but each individual item 359 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 360 * requires the mdsc->cap_dirty_lock. List presence for an item can 361 * be tested under the i_ceph_lock. Changing anything requires both. 362 */ 363 struct list_head i_dirty_item; 364 365 /* 366 * Link to session's s_cap_flushing list. Protected in a similar 367 * fashion to i_dirty_item, but also by the s_mutex for changes. The 368 * s_cap_flushing list can be walked while holding either the s_mutex 369 * or msdc->cap_dirty_lock. List presence can also be checked while 370 * holding the i_ceph_lock for this inode. 371 */ 372 struct list_head i_flushing_item; 373 374 /* we need to track cap writeback on a per-cap-bit basis, to allow 375 * overlapping, pipelined cap flushes to the mds. we can probably 376 * reduce the tid to 8 bits if we're concerned about inode size. */ 377 struct ceph_cap_flush *i_prealloc_cap_flush; 378 struct list_head i_cap_flush_list; 379 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 380 unsigned long i_hold_caps_max; /* jiffies */ 381 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 382 struct ceph_cap_reservation i_cap_migration_resv; 383 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 384 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 385 dirty|flushing caps */ 386 unsigned i_snap_caps; /* cap bits for snapped files */ 387 388 unsigned long i_last_rd; 389 unsigned long i_last_wr; 390 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 391 392 struct mutex i_truncate_mutex; 393 u32 i_truncate_seq; /* last truncate to smaller size */ 394 u64 i_truncate_size; /* and the size we last truncated down to */ 395 int i_truncate_pending; /* still need to call vmtruncate */ 396 397 u64 i_max_size; /* max file size authorized by mds */ 398 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 399 u64 i_wanted_max_size; /* offset we'd like to write too */ 400 u64 i_requested_max_size; /* max_size we've requested */ 401 402 /* held references to caps */ 403 int i_pin_ref; 404 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 405 int i_wrbuffer_ref, i_wrbuffer_ref_head; 406 atomic_t i_filelock_ref; 407 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 408 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 409 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 410 411 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 412 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 413 spinlock_t i_unsafe_lock; 414 415 union { 416 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 417 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 418 }; 419 int i_snap_realm_counter; /* snap realm (if caps) */ 420 struct list_head i_snap_realm_item; 421 struct list_head i_snap_flush_item; 422 struct timespec64 i_btime; 423 struct timespec64 i_snap_btime; 424 425 struct work_struct i_work; 426 unsigned long i_work_mask; 427 428 #ifdef CONFIG_CEPH_FSCACHE 429 struct fscache_cookie *fscache; 430 u32 i_fscache_gen; 431 #endif 432 errseq_t i_meta_err; 433 434 struct inode vfs_inode; /* at end */ 435 }; 436 437 static inline struct ceph_inode_info * 438 ceph_inode(const struct inode *inode) 439 { 440 return container_of(inode, struct ceph_inode_info, vfs_inode); 441 } 442 443 static inline struct ceph_fs_client * 444 ceph_inode_to_client(const struct inode *inode) 445 { 446 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 447 } 448 449 static inline struct ceph_fs_client * 450 ceph_sb_to_client(const struct super_block *sb) 451 { 452 return (struct ceph_fs_client *)sb->s_fs_info; 453 } 454 455 static inline struct ceph_mds_client * 456 ceph_sb_to_mdsc(const struct super_block *sb) 457 { 458 return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc; 459 } 460 461 static inline struct ceph_vino 462 ceph_vino(const struct inode *inode) 463 { 464 return ceph_inode(inode)->i_vino; 465 } 466 467 static inline u32 ceph_ino_to_ino32(u64 vino) 468 { 469 u32 ino = vino & 0xffffffff; 470 ino ^= vino >> 32; 471 if (!ino) 472 ino = 2; 473 return ino; 474 } 475 476 /* 477 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 478 * some arches. We generally do not use this value inside the ceph driver, but 479 * we do want to set it to something, so that generic vfs code has an 480 * appropriate value for tracepoints and the like. 481 */ 482 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 483 { 484 if (sizeof(ino_t) == sizeof(u32)) 485 return ceph_ino_to_ino32(vino.ino); 486 return (ino_t)vino.ino; 487 } 488 489 /* for printf-style formatting */ 490 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 491 492 static inline u64 ceph_ino(struct inode *inode) 493 { 494 return ceph_inode(inode)->i_vino.ino; 495 } 496 497 static inline u64 ceph_snap(struct inode *inode) 498 { 499 return ceph_inode(inode)->i_vino.snap; 500 } 501 502 /** 503 * ceph_present_ino - format an inode number for presentation to userland 504 * @sb: superblock where the inode lives 505 * @ino: inode number to (possibly) convert 506 * 507 * If the user mounted with the ino32 option, then the 64-bit value needs 508 * to be converted to something that can fit inside 32 bits. Note that 509 * internal kernel code never uses this value, so this is entirely for 510 * userland consumption. 511 */ 512 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 513 { 514 if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))) 515 return ceph_ino_to_ino32(ino); 516 return ino; 517 } 518 519 static inline u64 ceph_present_inode(struct inode *inode) 520 { 521 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 522 } 523 524 static inline int ceph_ino_compare(struct inode *inode, void *data) 525 { 526 struct ceph_vino *pvino = (struct ceph_vino *)data; 527 struct ceph_inode_info *ci = ceph_inode(inode); 528 return ci->i_vino.ino == pvino->ino && 529 ci->i_vino.snap == pvino->snap; 530 } 531 532 533 static inline struct inode *ceph_find_inode(struct super_block *sb, 534 struct ceph_vino vino) 535 { 536 /* 537 * NB: The hashval will be run through the fs/inode.c hash function 538 * anyway, so there is no need to squash the inode number down to 539 * 32-bits first. Just use low-order bits on arches with 32-bit long. 540 */ 541 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 542 } 543 544 545 /* 546 * Ceph inode. 547 */ 548 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ 549 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ 550 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ 551 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ 552 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ 553 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ 554 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ 555 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ 556 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ 557 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ 558 #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */ 559 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 560 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) 561 562 /* 563 * Masks of ceph inode work. 564 */ 565 #define CEPH_I_WORK_WRITEBACK 0 566 #define CEPH_I_WORK_INVALIDATE_PAGES 1 567 #define CEPH_I_WORK_VMTRUNCATE 2 568 #define CEPH_I_WORK_CHECK_CAPS 3 569 #define CEPH_I_WORK_FLUSH_SNAPS 4 570 571 /* 572 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 573 * and then clear it when they start succeeding. Note that we do a lockless 574 * check first, and only take the lock if it looks like it needs to be changed. 575 * The write submission code just takes this as a hint, so we're not too 576 * worried if a few slip through in either direction. 577 */ 578 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 579 { 580 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 581 spin_lock(&ci->i_ceph_lock); 582 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 583 spin_unlock(&ci->i_ceph_lock); 584 } 585 } 586 587 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 588 { 589 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 590 spin_lock(&ci->i_ceph_lock); 591 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 592 spin_unlock(&ci->i_ceph_lock); 593 } 594 } 595 596 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 597 long long release_count, 598 long long ordered_count) 599 { 600 /* 601 * Makes sure operations that setup readdir cache (update page 602 * cache and i_size) are strongly ordered w.r.t. the following 603 * atomic64_set() operations. 604 */ 605 smp_mb(); 606 atomic64_set(&ci->i_complete_seq[0], release_count); 607 atomic64_set(&ci->i_complete_seq[1], ordered_count); 608 } 609 610 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 611 { 612 atomic64_inc(&ci->i_release_count); 613 } 614 615 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 616 { 617 atomic64_inc(&ci->i_ordered_count); 618 } 619 620 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 621 { 622 return atomic64_read(&ci->i_complete_seq[0]) == 623 atomic64_read(&ci->i_release_count); 624 } 625 626 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 627 { 628 return atomic64_read(&ci->i_complete_seq[0]) == 629 atomic64_read(&ci->i_release_count) && 630 atomic64_read(&ci->i_complete_seq[1]) == 631 atomic64_read(&ci->i_ordered_count); 632 } 633 634 static inline void ceph_dir_clear_complete(struct inode *inode) 635 { 636 __ceph_dir_clear_complete(ceph_inode(inode)); 637 } 638 639 static inline void ceph_dir_clear_ordered(struct inode *inode) 640 { 641 __ceph_dir_clear_ordered(ceph_inode(inode)); 642 } 643 644 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 645 { 646 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 647 smp_rmb(); 648 return ret; 649 } 650 651 /* find a specific frag @f */ 652 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 653 u32 f); 654 655 /* 656 * choose fragment for value @v. copy frag content to pfrag, if leaf 657 * exists 658 */ 659 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 660 struct ceph_inode_frag *pfrag, 661 int *found); 662 663 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 664 { 665 return (struct ceph_dentry_info *)dentry->d_fsdata; 666 } 667 668 /* 669 * caps helpers 670 */ 671 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 672 { 673 return !RB_EMPTY_ROOT(&ci->i_caps); 674 } 675 676 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 677 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 678 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 679 int t); 680 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 681 struct ceph_cap *cap); 682 683 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 684 { 685 int issued; 686 spin_lock(&ci->i_ceph_lock); 687 issued = __ceph_caps_issued(ci, NULL); 688 spin_unlock(&ci->i_ceph_lock); 689 return issued; 690 } 691 692 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 693 int mask, int touch) 694 { 695 int r; 696 spin_lock(&ci->i_ceph_lock); 697 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 698 spin_unlock(&ci->i_ceph_lock); 699 return r; 700 } 701 702 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 703 { 704 return ci->i_dirty_caps | ci->i_flushing_caps; 705 } 706 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 707 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 708 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 709 struct ceph_cap_flush **pcf); 710 711 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 712 struct ceph_cap *ocap, int mask); 713 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 714 extern int __ceph_caps_used(struct ceph_inode_info *ci); 715 716 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 717 { 718 return ci->i_nr_by_mode[0]; 719 } 720 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 721 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 722 723 /* what the mds thinks we want */ 724 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 725 726 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 727 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 728 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 729 struct ceph_mount_options *fsopt); 730 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 731 struct ceph_cap_reservation *ctx, int need); 732 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 733 struct ceph_cap_reservation *ctx); 734 extern void ceph_reservation_status(struct ceph_fs_client *client, 735 int *total, int *avail, int *used, 736 int *reserved, int *min); 737 738 739 740 /* 741 * we keep buffered readdir results attached to file->private_data 742 */ 743 #define CEPH_F_SYNC 1 744 #define CEPH_F_ATEND 2 745 746 struct ceph_file_info { 747 short fmode; /* initialized on open */ 748 short flags; /* CEPH_F_* */ 749 750 spinlock_t rw_contexts_lock; 751 struct list_head rw_contexts; 752 753 errseq_t meta_err; 754 u32 filp_gen; 755 atomic_t num_locks; 756 }; 757 758 struct ceph_dir_file_info { 759 struct ceph_file_info file_info; 760 761 /* readdir: position within the dir */ 762 u32 frag; 763 struct ceph_mds_request *last_readdir; 764 765 /* readdir: position within a frag */ 766 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 767 char *last_name; /* last entry in previous chunk */ 768 long long dir_release_count; 769 long long dir_ordered_count; 770 int readdir_cache_idx; 771 772 /* used for -o dirstat read() on directory thing */ 773 char *dir_info; 774 int dir_info_len; 775 }; 776 777 struct ceph_rw_context { 778 struct list_head list; 779 struct task_struct *thread; 780 int caps; 781 }; 782 783 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 784 struct ceph_rw_context _name = { \ 785 .thread = current, \ 786 .caps = _caps, \ 787 } 788 789 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 790 struct ceph_rw_context *ctx) 791 { 792 spin_lock(&cf->rw_contexts_lock); 793 list_add(&ctx->list, &cf->rw_contexts); 794 spin_unlock(&cf->rw_contexts_lock); 795 } 796 797 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 798 struct ceph_rw_context *ctx) 799 { 800 spin_lock(&cf->rw_contexts_lock); 801 list_del(&ctx->list); 802 spin_unlock(&cf->rw_contexts_lock); 803 } 804 805 static inline struct ceph_rw_context* 806 ceph_find_rw_context(struct ceph_file_info *cf) 807 { 808 struct ceph_rw_context *ctx, *found = NULL; 809 spin_lock(&cf->rw_contexts_lock); 810 list_for_each_entry(ctx, &cf->rw_contexts, list) { 811 if (ctx->thread == current) { 812 found = ctx; 813 break; 814 } 815 } 816 spin_unlock(&cf->rw_contexts_lock); 817 return found; 818 } 819 820 struct ceph_readdir_cache_control { 821 struct page *page; 822 struct dentry **dentries; 823 int index; 824 }; 825 826 /* 827 * A "snap realm" describes a subset of the file hierarchy sharing 828 * the same set of snapshots that apply to it. The realms themselves 829 * are organized into a hierarchy, such that children inherit (some of) 830 * the snapshots of their parents. 831 * 832 * All inodes within the realm that have capabilities are linked into a 833 * per-realm list. 834 */ 835 struct ceph_snap_realm { 836 u64 ino; 837 struct inode *inode; 838 atomic_t nref; 839 struct rb_node node; 840 841 u64 created, seq; 842 u64 parent_ino; 843 u64 parent_since; /* snapid when our current parent became so */ 844 845 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 846 u32 num_prior_parent_snaps; /* had prior to parent_since */ 847 u64 *snaps; /* snaps specific to this realm */ 848 u32 num_snaps; 849 850 struct ceph_snap_realm *parent; 851 struct list_head children; /* list of child realms */ 852 struct list_head child_item; 853 854 struct list_head empty_item; /* if i have ref==0 */ 855 856 struct list_head dirty_item; /* if realm needs new context */ 857 858 /* the current set of snaps for this realm */ 859 struct ceph_snap_context *cached_context; 860 861 struct list_head inodes_with_caps; 862 spinlock_t inodes_with_caps_lock; 863 }; 864 865 static inline int default_congestion_kb(void) 866 { 867 int congestion_kb; 868 869 /* 870 * Copied from NFS 871 * 872 * congestion size, scale with available memory. 873 * 874 * 64MB: 8192k 875 * 128MB: 11585k 876 * 256MB: 16384k 877 * 512MB: 23170k 878 * 1GB: 32768k 879 * 2GB: 46340k 880 * 4GB: 65536k 881 * 8GB: 92681k 882 * 16GB: 131072k 883 * 884 * This allows larger machines to have larger/more transfers. 885 * Limit the default to 256M 886 */ 887 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 888 if (congestion_kb > 256*1024) 889 congestion_kb = 256*1024; 890 891 return congestion_kb; 892 } 893 894 895 /* super.c */ 896 extern int ceph_force_reconnect(struct super_block *sb); 897 /* snap.c */ 898 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 899 u64 ino); 900 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 901 struct ceph_snap_realm *realm); 902 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 903 struct ceph_snap_realm *realm); 904 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 905 void *p, void *e, bool deletion, 906 struct ceph_snap_realm **realm_ret); 907 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 908 struct ceph_mds_session *session, 909 struct ceph_msg *msg); 910 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci); 911 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 912 struct ceph_cap_snap *capsnap); 913 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); 914 915 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 916 u64 snap); 917 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 918 struct ceph_snapid_map *sm); 919 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 920 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 921 922 923 /* 924 * a cap_snap is "pending" if it is still awaiting an in-progress 925 * sync write (that may/may not still update size, mtime, etc.). 926 */ 927 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 928 { 929 return !list_empty(&ci->i_cap_snaps) && 930 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 931 ci_item)->writing; 932 } 933 934 /* inode.c */ 935 struct ceph_mds_reply_info_in; 936 struct ceph_mds_reply_dirfrag; 937 938 extern const struct inode_operations ceph_file_iops; 939 940 extern struct inode *ceph_alloc_inode(struct super_block *sb); 941 extern void ceph_evict_inode(struct inode *inode); 942 extern void ceph_free_inode(struct inode *inode); 943 944 extern struct inode *ceph_get_inode(struct super_block *sb, 945 struct ceph_vino vino); 946 extern struct inode *ceph_get_snapdir(struct inode *parent); 947 extern int ceph_fill_file_size(struct inode *inode, int issued, 948 u32 truncate_seq, u64 truncate_size, u64 size); 949 extern void ceph_fill_file_time(struct inode *inode, int issued, 950 u64 time_warp_seq, struct timespec64 *ctime, 951 struct timespec64 *mtime, 952 struct timespec64 *atime); 953 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 954 struct ceph_mds_reply_info_in *iinfo, 955 struct ceph_mds_reply_dirfrag *dirinfo, 956 struct ceph_mds_session *session, int cap_fmode, 957 struct ceph_cap_reservation *caps_reservation); 958 extern int ceph_fill_trace(struct super_block *sb, 959 struct ceph_mds_request *req); 960 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 961 struct ceph_mds_session *session); 962 963 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 964 965 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 966 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 967 968 extern void ceph_async_iput(struct inode *inode); 969 970 void ceph_queue_inode_work(struct inode *inode, int work_bit); 971 972 static inline void ceph_queue_vmtruncate(struct inode *inode) 973 { 974 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); 975 } 976 977 static inline void ceph_queue_invalidate(struct inode *inode) 978 { 979 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); 980 } 981 982 static inline void ceph_queue_writeback(struct inode *inode) 983 { 984 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); 985 } 986 987 static inline void ceph_queue_check_caps(struct inode *inode) 988 { 989 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); 990 } 991 992 static inline void ceph_queue_flush_snaps(struct inode *inode) 993 { 994 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); 995 } 996 997 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 998 int mask, bool force); 999 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 1000 { 1001 return __ceph_do_getattr(inode, NULL, mask, force); 1002 } 1003 extern int ceph_permission(struct user_namespace *mnt_userns, 1004 struct inode *inode, int mask); 1005 extern int __ceph_setattr(struct inode *inode, struct iattr *attr); 1006 extern int ceph_setattr(struct user_namespace *mnt_userns, 1007 struct dentry *dentry, struct iattr *attr); 1008 extern int ceph_getattr(struct user_namespace *mnt_userns, 1009 const struct path *path, struct kstat *stat, 1010 u32 request_mask, unsigned int flags); 1011 1012 /* xattr.c */ 1013 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 1014 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 1015 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 1016 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 1017 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 1018 extern const struct xattr_handler *ceph_xattr_handlers[]; 1019 1020 struct ceph_acl_sec_ctx { 1021 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1022 void *default_acl; 1023 void *acl; 1024 #endif 1025 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1026 void *sec_ctx; 1027 u32 sec_ctxlen; 1028 #endif 1029 struct ceph_pagelist *pagelist; 1030 }; 1031 1032 #ifdef CONFIG_SECURITY 1033 extern bool ceph_security_xattr_deadlock(struct inode *in); 1034 extern bool ceph_security_xattr_wanted(struct inode *in); 1035 #else 1036 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1037 { 1038 return false; 1039 } 1040 static inline bool ceph_security_xattr_wanted(struct inode *in) 1041 { 1042 return false; 1043 } 1044 #endif 1045 1046 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1047 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1048 struct ceph_acl_sec_ctx *ctx); 1049 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1050 { 1051 security_inode_invalidate_secctx(inode); 1052 } 1053 #else 1054 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1055 struct ceph_acl_sec_ctx *ctx) 1056 { 1057 return 0; 1058 } 1059 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1060 { 1061 } 1062 #endif 1063 1064 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1065 1066 /* acl.c */ 1067 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1068 1069 struct posix_acl *ceph_get_acl(struct inode *, int); 1070 int ceph_set_acl(struct user_namespace *mnt_userns, 1071 struct inode *inode, struct posix_acl *acl, int type); 1072 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1073 struct ceph_acl_sec_ctx *as_ctx); 1074 void ceph_init_inode_acls(struct inode *inode, 1075 struct ceph_acl_sec_ctx *as_ctx); 1076 1077 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1078 { 1079 forget_all_cached_acls(inode); 1080 } 1081 1082 #else 1083 1084 #define ceph_get_acl NULL 1085 #define ceph_set_acl NULL 1086 1087 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1088 struct ceph_acl_sec_ctx *as_ctx) 1089 { 1090 return 0; 1091 } 1092 static inline void ceph_init_inode_acls(struct inode *inode, 1093 struct ceph_acl_sec_ctx *as_ctx) 1094 { 1095 } 1096 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 1097 { 1098 return 0; 1099 } 1100 1101 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1102 { 1103 } 1104 1105 #endif 1106 1107 /* caps.c */ 1108 extern const char *ceph_cap_string(int c); 1109 extern void ceph_handle_caps(struct ceph_mds_session *session, 1110 struct ceph_msg *msg); 1111 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1112 struct ceph_cap_reservation *ctx); 1113 extern void ceph_add_cap(struct inode *inode, 1114 struct ceph_mds_session *session, u64 cap_id, 1115 unsigned issued, unsigned wanted, 1116 unsigned cap, unsigned seq, u64 realmino, int flags, 1117 struct ceph_cap **new_cap); 1118 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1119 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1120 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1121 struct ceph_cap *cap); 1122 extern int ceph_is_any_caps(struct inode *inode); 1123 1124 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1125 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1126 int datasync); 1127 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1128 struct ceph_mds_session *session); 1129 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1130 struct ceph_mds_session *session); 1131 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1132 struct ceph_inode_info *ci); 1133 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1134 int mds); 1135 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1136 bool snap_rwsem_locked); 1137 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1138 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1139 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); 1140 extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, 1141 int had); 1142 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1143 struct ceph_snap_context *snapc); 1144 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1145 struct ceph_mds_session **psession); 1146 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1147 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 1148 struct ceph_mds_session *session); 1149 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1150 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1151 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1152 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1153 int mds, int drop, int unless, int force); 1154 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1155 struct inode *dir, 1156 int mds, int drop, int unless); 1157 1158 extern int ceph_get_caps(struct file *filp, int need, int want, 1159 loff_t endoff, int *got, struct page **pinned_page); 1160 extern int ceph_try_get_caps(struct inode *inode, 1161 int need, int want, bool nonblock, int *got); 1162 1163 /* for counting open files by mode */ 1164 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1165 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1166 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1167 struct ceph_mds_client *mdsc, int fmode); 1168 1169 /* addr.c */ 1170 extern const struct address_space_operations ceph_aops; 1171 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 1172 extern int ceph_uninline_data(struct file *filp, struct page *locked_page); 1173 extern int ceph_pool_perm_check(struct inode *inode, int need); 1174 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1175 1176 /* file.c */ 1177 extern const struct file_operations ceph_file_fops; 1178 1179 extern int ceph_renew_caps(struct inode *inode, int fmode); 1180 extern int ceph_open(struct inode *inode, struct file *file); 1181 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1182 struct file *file, unsigned flags, umode_t mode); 1183 extern int ceph_release(struct inode *inode, struct file *filp); 1184 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1185 char *data, size_t len); 1186 1187 /* dir.c */ 1188 extern const struct file_operations ceph_dir_fops; 1189 extern const struct file_operations ceph_snapdir_fops; 1190 extern const struct inode_operations ceph_dir_iops; 1191 extern const struct inode_operations ceph_snapdir_iops; 1192 extern const struct dentry_operations ceph_dentry_ops; 1193 1194 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1195 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1196 extern int ceph_handle_snapdir(struct ceph_mds_request *req, 1197 struct dentry *dentry, int err); 1198 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1199 struct dentry *dentry, int err); 1200 1201 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1202 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1203 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1204 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1205 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1206 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1207 1208 /* ioctl.c */ 1209 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1210 1211 /* export.c */ 1212 extern const struct export_operations ceph_export_ops; 1213 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1214 1215 /* locks.c */ 1216 extern __init void ceph_flock_init(void); 1217 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1218 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1219 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1220 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1221 struct ceph_filelock *flocks, 1222 int num_fcntl_locks, 1223 int num_flock_locks); 1224 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1225 struct ceph_pagelist *pagelist, 1226 int num_fcntl_locks, int num_flock_locks); 1227 1228 /* debugfs.c */ 1229 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1230 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1231 1232 /* quota.c */ 1233 static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci) 1234 { 1235 return ci->i_max_files || ci->i_max_bytes; 1236 } 1237 1238 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1239 1240 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1241 u64 max_bytes, u64 max_files) 1242 { 1243 bool had_quota, has_quota; 1244 had_quota = __ceph_has_any_quota(ci); 1245 ci->i_max_bytes = max_bytes; 1246 ci->i_max_files = max_files; 1247 has_quota = __ceph_has_any_quota(ci); 1248 1249 if (had_quota != has_quota) 1250 ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota); 1251 } 1252 1253 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1254 struct ceph_mds_session *session, 1255 struct ceph_msg *msg); 1256 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1257 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1258 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1259 loff_t newlen); 1260 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1261 loff_t newlen); 1262 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1263 struct kstatfs *buf); 1264 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1265 1266 #endif /* _FS_CEPH_SUPER_H */ 1267