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 /* writeback */ 566 #define CEPH_I_WORK_INVALIDATE_PAGES 1 /* invalidate pages */ 567 #define CEPH_I_WORK_VMTRUNCATE 2 /* vmtruncate */ 568 569 /* 570 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 571 * and then clear it when they start succeeding. Note that we do a lockless 572 * check first, and only take the lock if it looks like it needs to be changed. 573 * The write submission code just takes this as a hint, so we're not too 574 * worried if a few slip through in either direction. 575 */ 576 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 577 { 578 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 579 spin_lock(&ci->i_ceph_lock); 580 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 581 spin_unlock(&ci->i_ceph_lock); 582 } 583 } 584 585 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 586 { 587 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 588 spin_lock(&ci->i_ceph_lock); 589 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 590 spin_unlock(&ci->i_ceph_lock); 591 } 592 } 593 594 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 595 long long release_count, 596 long long ordered_count) 597 { 598 /* 599 * Makes sure operations that setup readdir cache (update page 600 * cache and i_size) are strongly ordered w.r.t. the following 601 * atomic64_set() operations. 602 */ 603 smp_mb(); 604 atomic64_set(&ci->i_complete_seq[0], release_count); 605 atomic64_set(&ci->i_complete_seq[1], ordered_count); 606 } 607 608 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 609 { 610 atomic64_inc(&ci->i_release_count); 611 } 612 613 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 614 { 615 atomic64_inc(&ci->i_ordered_count); 616 } 617 618 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 619 { 620 return atomic64_read(&ci->i_complete_seq[0]) == 621 atomic64_read(&ci->i_release_count); 622 } 623 624 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 625 { 626 return atomic64_read(&ci->i_complete_seq[0]) == 627 atomic64_read(&ci->i_release_count) && 628 atomic64_read(&ci->i_complete_seq[1]) == 629 atomic64_read(&ci->i_ordered_count); 630 } 631 632 static inline void ceph_dir_clear_complete(struct inode *inode) 633 { 634 __ceph_dir_clear_complete(ceph_inode(inode)); 635 } 636 637 static inline void ceph_dir_clear_ordered(struct inode *inode) 638 { 639 __ceph_dir_clear_ordered(ceph_inode(inode)); 640 } 641 642 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 643 { 644 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 645 smp_rmb(); 646 return ret; 647 } 648 649 /* find a specific frag @f */ 650 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 651 u32 f); 652 653 /* 654 * choose fragment for value @v. copy frag content to pfrag, if leaf 655 * exists 656 */ 657 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 658 struct ceph_inode_frag *pfrag, 659 int *found); 660 661 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 662 { 663 return (struct ceph_dentry_info *)dentry->d_fsdata; 664 } 665 666 /* 667 * caps helpers 668 */ 669 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 670 { 671 return !RB_EMPTY_ROOT(&ci->i_caps); 672 } 673 674 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 675 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 676 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 677 int t); 678 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 679 struct ceph_cap *cap); 680 681 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 682 { 683 int issued; 684 spin_lock(&ci->i_ceph_lock); 685 issued = __ceph_caps_issued(ci, NULL); 686 spin_unlock(&ci->i_ceph_lock); 687 return issued; 688 } 689 690 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 691 int mask, int touch) 692 { 693 int r; 694 spin_lock(&ci->i_ceph_lock); 695 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 696 spin_unlock(&ci->i_ceph_lock); 697 return r; 698 } 699 700 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 701 { 702 return ci->i_dirty_caps | ci->i_flushing_caps; 703 } 704 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 705 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 706 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 707 struct ceph_cap_flush **pcf); 708 709 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 710 struct ceph_cap *ocap, int mask); 711 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 712 extern int __ceph_caps_used(struct ceph_inode_info *ci); 713 714 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 715 { 716 return ci->i_nr_by_mode[0]; 717 } 718 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 719 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 720 721 /* what the mds thinks we want */ 722 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 723 724 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 725 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 726 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 727 struct ceph_mount_options *fsopt); 728 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 729 struct ceph_cap_reservation *ctx, int need); 730 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 731 struct ceph_cap_reservation *ctx); 732 extern void ceph_reservation_status(struct ceph_fs_client *client, 733 int *total, int *avail, int *used, 734 int *reserved, int *min); 735 736 737 738 /* 739 * we keep buffered readdir results attached to file->private_data 740 */ 741 #define CEPH_F_SYNC 1 742 #define CEPH_F_ATEND 2 743 744 struct ceph_file_info { 745 short fmode; /* initialized on open */ 746 short flags; /* CEPH_F_* */ 747 748 spinlock_t rw_contexts_lock; 749 struct list_head rw_contexts; 750 751 errseq_t meta_err; 752 u32 filp_gen; 753 atomic_t num_locks; 754 }; 755 756 struct ceph_dir_file_info { 757 struct ceph_file_info file_info; 758 759 /* readdir: position within the dir */ 760 u32 frag; 761 struct ceph_mds_request *last_readdir; 762 763 /* readdir: position within a frag */ 764 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 765 char *last_name; /* last entry in previous chunk */ 766 long long dir_release_count; 767 long long dir_ordered_count; 768 int readdir_cache_idx; 769 770 /* used for -o dirstat read() on directory thing */ 771 char *dir_info; 772 int dir_info_len; 773 }; 774 775 struct ceph_rw_context { 776 struct list_head list; 777 struct task_struct *thread; 778 int caps; 779 }; 780 781 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 782 struct ceph_rw_context _name = { \ 783 .thread = current, \ 784 .caps = _caps, \ 785 } 786 787 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 788 struct ceph_rw_context *ctx) 789 { 790 spin_lock(&cf->rw_contexts_lock); 791 list_add(&ctx->list, &cf->rw_contexts); 792 spin_unlock(&cf->rw_contexts_lock); 793 } 794 795 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 796 struct ceph_rw_context *ctx) 797 { 798 spin_lock(&cf->rw_contexts_lock); 799 list_del(&ctx->list); 800 spin_unlock(&cf->rw_contexts_lock); 801 } 802 803 static inline struct ceph_rw_context* 804 ceph_find_rw_context(struct ceph_file_info *cf) 805 { 806 struct ceph_rw_context *ctx, *found = NULL; 807 spin_lock(&cf->rw_contexts_lock); 808 list_for_each_entry(ctx, &cf->rw_contexts, list) { 809 if (ctx->thread == current) { 810 found = ctx; 811 break; 812 } 813 } 814 spin_unlock(&cf->rw_contexts_lock); 815 return found; 816 } 817 818 struct ceph_readdir_cache_control { 819 struct page *page; 820 struct dentry **dentries; 821 int index; 822 }; 823 824 /* 825 * A "snap realm" describes a subset of the file hierarchy sharing 826 * the same set of snapshots that apply to it. The realms themselves 827 * are organized into a hierarchy, such that children inherit (some of) 828 * the snapshots of their parents. 829 * 830 * All inodes within the realm that have capabilities are linked into a 831 * per-realm list. 832 */ 833 struct ceph_snap_realm { 834 u64 ino; 835 struct inode *inode; 836 atomic_t nref; 837 struct rb_node node; 838 839 u64 created, seq; 840 u64 parent_ino; 841 u64 parent_since; /* snapid when our current parent became so */ 842 843 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 844 u32 num_prior_parent_snaps; /* had prior to parent_since */ 845 u64 *snaps; /* snaps specific to this realm */ 846 u32 num_snaps; 847 848 struct ceph_snap_realm *parent; 849 struct list_head children; /* list of child realms */ 850 struct list_head child_item; 851 852 struct list_head empty_item; /* if i have ref==0 */ 853 854 struct list_head dirty_item; /* if realm needs new context */ 855 856 /* the current set of snaps for this realm */ 857 struct ceph_snap_context *cached_context; 858 859 struct list_head inodes_with_caps; 860 spinlock_t inodes_with_caps_lock; 861 }; 862 863 static inline int default_congestion_kb(void) 864 { 865 int congestion_kb; 866 867 /* 868 * Copied from NFS 869 * 870 * congestion size, scale with available memory. 871 * 872 * 64MB: 8192k 873 * 128MB: 11585k 874 * 256MB: 16384k 875 * 512MB: 23170k 876 * 1GB: 32768k 877 * 2GB: 46340k 878 * 4GB: 65536k 879 * 8GB: 92681k 880 * 16GB: 131072k 881 * 882 * This allows larger machines to have larger/more transfers. 883 * Limit the default to 256M 884 */ 885 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 886 if (congestion_kb > 256*1024) 887 congestion_kb = 256*1024; 888 889 return congestion_kb; 890 } 891 892 893 /* super.c */ 894 extern int ceph_force_reconnect(struct super_block *sb); 895 /* snap.c */ 896 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 897 u64 ino); 898 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 899 struct ceph_snap_realm *realm); 900 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 901 struct ceph_snap_realm *realm); 902 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 903 void *p, void *e, bool deletion, 904 struct ceph_snap_realm **realm_ret); 905 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 906 struct ceph_mds_session *session, 907 struct ceph_msg *msg); 908 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci); 909 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 910 struct ceph_cap_snap *capsnap); 911 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); 912 913 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 914 u64 snap); 915 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 916 struct ceph_snapid_map *sm); 917 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 918 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 919 920 921 /* 922 * a cap_snap is "pending" if it is still awaiting an in-progress 923 * sync write (that may/may not still update size, mtime, etc.). 924 */ 925 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 926 { 927 return !list_empty(&ci->i_cap_snaps) && 928 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 929 ci_item)->writing; 930 } 931 932 /* inode.c */ 933 struct ceph_mds_reply_info_in; 934 struct ceph_mds_reply_dirfrag; 935 936 extern const struct inode_operations ceph_file_iops; 937 938 extern struct inode *ceph_alloc_inode(struct super_block *sb); 939 extern void ceph_evict_inode(struct inode *inode); 940 extern void ceph_free_inode(struct inode *inode); 941 942 extern struct inode *ceph_get_inode(struct super_block *sb, 943 struct ceph_vino vino); 944 extern struct inode *ceph_get_snapdir(struct inode *parent); 945 extern int ceph_fill_file_size(struct inode *inode, int issued, 946 u32 truncate_seq, u64 truncate_size, u64 size); 947 extern void ceph_fill_file_time(struct inode *inode, int issued, 948 u64 time_warp_seq, struct timespec64 *ctime, 949 struct timespec64 *mtime, 950 struct timespec64 *atime); 951 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 952 struct ceph_mds_reply_info_in *iinfo, 953 struct ceph_mds_reply_dirfrag *dirinfo, 954 struct ceph_mds_session *session, int cap_fmode, 955 struct ceph_cap_reservation *caps_reservation); 956 extern int ceph_fill_trace(struct super_block *sb, 957 struct ceph_mds_request *req); 958 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 959 struct ceph_mds_session *session); 960 961 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 962 963 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 964 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 965 extern void ceph_queue_vmtruncate(struct inode *inode); 966 extern void ceph_queue_invalidate(struct inode *inode); 967 extern void ceph_queue_writeback(struct inode *inode); 968 extern void ceph_async_iput(struct inode *inode); 969 970 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 971 int mask, bool force); 972 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 973 { 974 return __ceph_do_getattr(inode, NULL, mask, force); 975 } 976 extern int ceph_permission(struct inode *inode, int mask); 977 extern int __ceph_setattr(struct inode *inode, struct iattr *attr); 978 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); 979 extern int ceph_getattr(const struct path *path, struct kstat *stat, 980 u32 request_mask, unsigned int flags); 981 982 /* xattr.c */ 983 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 984 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 985 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 986 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 987 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 988 extern const struct xattr_handler *ceph_xattr_handlers[]; 989 990 struct ceph_acl_sec_ctx { 991 #ifdef CONFIG_CEPH_FS_POSIX_ACL 992 void *default_acl; 993 void *acl; 994 #endif 995 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 996 void *sec_ctx; 997 u32 sec_ctxlen; 998 #endif 999 struct ceph_pagelist *pagelist; 1000 }; 1001 1002 #ifdef CONFIG_SECURITY 1003 extern bool ceph_security_xattr_deadlock(struct inode *in); 1004 extern bool ceph_security_xattr_wanted(struct inode *in); 1005 #else 1006 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1007 { 1008 return false; 1009 } 1010 static inline bool ceph_security_xattr_wanted(struct inode *in) 1011 { 1012 return false; 1013 } 1014 #endif 1015 1016 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1017 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1018 struct ceph_acl_sec_ctx *ctx); 1019 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1020 { 1021 security_inode_invalidate_secctx(inode); 1022 } 1023 #else 1024 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1025 struct ceph_acl_sec_ctx *ctx) 1026 { 1027 return 0; 1028 } 1029 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1030 { 1031 } 1032 #endif 1033 1034 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1035 1036 /* acl.c */ 1037 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1038 1039 struct posix_acl *ceph_get_acl(struct inode *, int); 1040 int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type); 1041 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1042 struct ceph_acl_sec_ctx *as_ctx); 1043 void ceph_init_inode_acls(struct inode *inode, 1044 struct ceph_acl_sec_ctx *as_ctx); 1045 1046 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1047 { 1048 forget_all_cached_acls(inode); 1049 } 1050 1051 #else 1052 1053 #define ceph_get_acl NULL 1054 #define ceph_set_acl NULL 1055 1056 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1057 struct ceph_acl_sec_ctx *as_ctx) 1058 { 1059 return 0; 1060 } 1061 static inline void ceph_init_inode_acls(struct inode *inode, 1062 struct ceph_acl_sec_ctx *as_ctx) 1063 { 1064 } 1065 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 1066 { 1067 return 0; 1068 } 1069 1070 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1071 { 1072 } 1073 1074 #endif 1075 1076 /* caps.c */ 1077 extern const char *ceph_cap_string(int c); 1078 extern void ceph_handle_caps(struct ceph_mds_session *session, 1079 struct ceph_msg *msg); 1080 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1081 struct ceph_cap_reservation *ctx); 1082 extern void ceph_add_cap(struct inode *inode, 1083 struct ceph_mds_session *session, u64 cap_id, 1084 unsigned issued, unsigned wanted, 1085 unsigned cap, unsigned seq, u64 realmino, int flags, 1086 struct ceph_cap **new_cap); 1087 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1088 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1089 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1090 struct ceph_cap *cap); 1091 extern int ceph_is_any_caps(struct inode *inode); 1092 1093 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1094 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1095 int datasync); 1096 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1097 struct ceph_mds_session *session); 1098 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1099 struct ceph_mds_session *session); 1100 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1101 struct ceph_inode_info *ci); 1102 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1103 int mds); 1104 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1105 bool snap_rwsem_locked); 1106 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1107 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1108 extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, 1109 int had); 1110 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1111 struct ceph_snap_context *snapc); 1112 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1113 struct ceph_mds_session **psession); 1114 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1115 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 1116 struct ceph_mds_session *session); 1117 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1118 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1119 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1120 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1121 int mds, int drop, int unless, int force); 1122 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1123 struct inode *dir, 1124 int mds, int drop, int unless); 1125 1126 extern int ceph_get_caps(struct file *filp, int need, int want, 1127 loff_t endoff, int *got, struct page **pinned_page); 1128 extern int ceph_try_get_caps(struct inode *inode, 1129 int need, int want, bool nonblock, int *got); 1130 1131 /* for counting open files by mode */ 1132 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1133 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1134 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1135 struct ceph_mds_client *mdsc, int fmode); 1136 1137 /* addr.c */ 1138 extern const struct address_space_operations ceph_aops; 1139 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 1140 extern int ceph_uninline_data(struct file *filp, struct page *locked_page); 1141 extern int ceph_pool_perm_check(struct inode *inode, int need); 1142 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1143 1144 /* file.c */ 1145 extern const struct file_operations ceph_file_fops; 1146 1147 extern int ceph_renew_caps(struct inode *inode, int fmode); 1148 extern int ceph_open(struct inode *inode, struct file *file); 1149 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1150 struct file *file, unsigned flags, umode_t mode); 1151 extern int ceph_release(struct inode *inode, struct file *filp); 1152 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1153 char *data, size_t len); 1154 1155 /* dir.c */ 1156 extern const struct file_operations ceph_dir_fops; 1157 extern const struct file_operations ceph_snapdir_fops; 1158 extern const struct inode_operations ceph_dir_iops; 1159 extern const struct inode_operations ceph_snapdir_iops; 1160 extern const struct dentry_operations ceph_dentry_ops; 1161 1162 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1163 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1164 extern int ceph_handle_snapdir(struct ceph_mds_request *req, 1165 struct dentry *dentry, int err); 1166 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1167 struct dentry *dentry, int err); 1168 1169 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1170 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1171 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1172 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1173 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1174 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1175 1176 /* ioctl.c */ 1177 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1178 1179 /* export.c */ 1180 extern const struct export_operations ceph_export_ops; 1181 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1182 1183 /* locks.c */ 1184 extern __init void ceph_flock_init(void); 1185 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1186 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1187 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1188 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1189 struct ceph_filelock *flocks, 1190 int num_fcntl_locks, 1191 int num_flock_locks); 1192 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1193 struct ceph_pagelist *pagelist, 1194 int num_fcntl_locks, int num_flock_locks); 1195 1196 /* debugfs.c */ 1197 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1198 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1199 1200 /* quota.c */ 1201 static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci) 1202 { 1203 return ci->i_max_files || ci->i_max_bytes; 1204 } 1205 1206 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1207 1208 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1209 u64 max_bytes, u64 max_files) 1210 { 1211 bool had_quota, has_quota; 1212 had_quota = __ceph_has_any_quota(ci); 1213 ci->i_max_bytes = max_bytes; 1214 ci->i_max_files = max_files; 1215 has_quota = __ceph_has_any_quota(ci); 1216 1217 if (had_quota != has_quota) 1218 ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota); 1219 } 1220 1221 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1222 struct ceph_mds_session *session, 1223 struct ceph_msg *msg); 1224 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1225 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1226 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1227 loff_t newlen); 1228 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1229 loff_t newlen); 1230 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1231 struct kstatfs *buf); 1232 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1233 1234 #endif /* _FS_CEPH_SUPER_H */ 1235