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 #include <linux/netfs.h> 21 #include <linux/fscache.h> 22 #include <linux/hashtable.h> 23 24 #include <linux/ceph/libceph.h> 25 26 /* large granularity for statfs utilization stats to facilitate 27 * large volume sizes on 32-bit machines. */ 28 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ 29 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 30 #define CEPH_4K_BLOCK_SHIFT 12 /* 4 KB */ 31 32 #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */ 33 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 34 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 35 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 36 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 37 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ 38 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ 39 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */ 40 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */ 41 #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ 42 #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */ 43 #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ 44 #define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache altogether */ 45 46 #define CEPH_MOUNT_OPT_DEFAULT \ 47 (CEPH_MOUNT_OPT_DCACHE | \ 48 CEPH_MOUNT_OPT_NOCOPYFROM | \ 49 CEPH_MOUNT_OPT_ASYNC_DIROPS) 50 51 #define ceph_set_mount_opt(fsc, opt) \ 52 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt 53 #define ceph_clear_mount_opt(fsc, opt) \ 54 (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt 55 #define ceph_test_mount_opt(fsc, opt) \ 56 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 57 58 /* max size of osd read request, limited by libceph */ 59 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN 60 /* osd has a configurable limitaion of max write size. 61 * CEPH_MSG_MAX_DATA_LEN should be small enough. */ 62 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN 63 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ 64 #define CEPH_MAX_READDIR_DEFAULT 1024 65 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 66 #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 67 68 /* 69 * Delay telling the MDS we no longer want caps, in case we reopen 70 * the file. Delay a minimum amount of time, even if we send a cap 71 * message for some other reason. Otherwise, take the oppotunity to 72 * update the mds to avoid sending another message later. 73 */ 74 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ 75 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ 76 77 struct ceph_mount_options { 78 unsigned int flags; 79 80 unsigned int wsize; /* max write size */ 81 unsigned int rsize; /* max read size */ 82 unsigned int rasize; /* max readahead */ 83 unsigned int congestion_kb; /* max writeback in flight */ 84 unsigned int caps_wanted_delay_min, caps_wanted_delay_max; 85 int caps_max; 86 unsigned int max_readdir; /* max readdir result (entries) */ 87 unsigned int max_readdir_bytes; /* max readdir result (bytes) */ 88 89 bool new_dev_syntax; 90 91 /* 92 * everything above this point can be memcmp'd; everything below 93 * is handled in compare_mount_options() 94 */ 95 96 char *snapdir_name; /* default ".snap" */ 97 char *mds_namespace; /* default NULL */ 98 char *server_path; /* default NULL (means "/") */ 99 char *fscache_uniq; /* default NULL */ 100 char *mon_addr; 101 }; 102 103 #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8 104 105 struct ceph_fs_client { 106 struct super_block *sb; 107 108 struct list_head metric_wakeup; 109 110 struct ceph_mount_options *mount_options; 111 struct ceph_client *client; 112 113 int mount_state; 114 115 bool blocklisted; 116 117 bool have_copy_from2; 118 119 u32 filp_gen; 120 loff_t max_file_size; 121 122 struct ceph_mds_client *mdsc; 123 124 atomic_long_t writeback_count; 125 bool write_congested; 126 127 struct workqueue_struct *inode_wq; 128 struct workqueue_struct *cap_wq; 129 130 DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS); 131 spinlock_t async_unlink_conflict_lock; 132 133 #ifdef CONFIG_DEBUG_FS 134 struct dentry *debugfs_dentry_lru, *debugfs_caps; 135 struct dentry *debugfs_congestion_kb; 136 struct dentry *debugfs_bdi; 137 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 138 struct dentry *debugfs_status; 139 struct dentry *debugfs_mds_sessions; 140 struct dentry *debugfs_metrics_dir; 141 #endif 142 143 #ifdef CONFIG_CEPH_FSCACHE 144 struct fscache_volume *fscache; 145 #endif 146 }; 147 148 149 /* 150 * File i/o capability. This tracks shared state with the metadata 151 * server that allows us to cache or writeback attributes or to read 152 * and write data. For any given inode, we should have one or more 153 * capabilities, one issued by each metadata server, and our 154 * cumulative access is the OR of all issued capabilities. 155 * 156 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 157 * session capability lists. 158 */ 159 struct ceph_cap { 160 struct ceph_inode_info *ci; 161 struct rb_node ci_node; /* per-ci cap tree */ 162 struct ceph_mds_session *session; 163 struct list_head session_caps; /* per-session caplist */ 164 u64 cap_id; /* unique cap id (mds provided) */ 165 union { 166 /* in-use caps */ 167 struct { 168 int issued; /* latest, from the mds */ 169 int implemented; /* implemented superset of 170 issued (for revocation) */ 171 int mds; /* mds index for this cap */ 172 int mds_wanted; /* caps wanted from this mds */ 173 }; 174 /* caps to release */ 175 struct { 176 u64 cap_ino; 177 int queue_release; 178 }; 179 }; 180 u32 seq, issue_seq, mseq; 181 u32 cap_gen; /* active/stale cycle */ 182 unsigned long last_used; 183 struct list_head caps_item; 184 }; 185 186 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 187 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 188 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 189 190 struct ceph_cap_flush { 191 u64 tid; 192 int caps; 193 bool wake; /* wake up flush waiters when finish ? */ 194 bool is_capsnap; /* true means capsnap */ 195 struct list_head g_list; // global 196 struct list_head i_list; // per inode 197 }; 198 199 /* 200 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 201 * we first complete any in-process sync writes and writeback any dirty 202 * data before flushing the snapped state (tracked here) back to the MDS. 203 */ 204 struct ceph_cap_snap { 205 refcount_t nref; 206 struct list_head ci_item; 207 208 struct ceph_cap_flush cap_flush; 209 210 u64 follows; 211 int issued, dirty; 212 struct ceph_snap_context *context; 213 214 umode_t mode; 215 kuid_t uid; 216 kgid_t gid; 217 218 struct ceph_buffer *xattr_blob; 219 u64 xattr_version; 220 221 u64 size; 222 u64 change_attr; 223 struct timespec64 mtime, atime, ctime, btime; 224 u64 time_warp_seq; 225 u64 truncate_size; 226 u32 truncate_seq; 227 int writing; /* a sync write is still in progress */ 228 int dirty_pages; /* dirty pages awaiting writeback */ 229 bool inline_data; 230 bool need_flush; 231 }; 232 233 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 234 { 235 if (refcount_dec_and_test(&capsnap->nref)) { 236 if (capsnap->xattr_blob) 237 ceph_buffer_put(capsnap->xattr_blob); 238 kmem_cache_free(ceph_cap_snap_cachep, capsnap); 239 } 240 } 241 242 /* 243 * The frag tree describes how a directory is fragmented, potentially across 244 * multiple metadata servers. It is also used to indicate points where 245 * metadata authority is delegated, and whether/where metadata is replicated. 246 * 247 * A _leaf_ frag will be present in the i_fragtree IFF there is 248 * delegation info. That is, if mds >= 0 || ndist > 0. 249 */ 250 #define CEPH_MAX_DIRFRAG_REP 4 251 252 struct ceph_inode_frag { 253 struct rb_node node; 254 255 /* fragtree state */ 256 u32 frag; 257 int split_by; /* i.e. 2^(split_by) children */ 258 259 /* delegation and replication info */ 260 int mds; /* -1 if same authority as parent */ 261 int ndist; /* >0 if replicated */ 262 int dist[CEPH_MAX_DIRFRAG_REP]; 263 }; 264 265 /* 266 * We cache inode xattrs as an encoded blob until they are first used, 267 * at which point we parse them into an rbtree. 268 */ 269 struct ceph_inode_xattr { 270 struct rb_node node; 271 272 const char *name; 273 int name_len; 274 const char *val; 275 int val_len; 276 int dirty; 277 278 int should_free_name; 279 int should_free_val; 280 }; 281 282 /* 283 * Ceph dentry state 284 */ 285 struct ceph_dentry_info { 286 struct dentry *dentry; 287 struct ceph_mds_session *lease_session; 288 struct list_head lease_list; 289 struct hlist_node hnode; 290 unsigned long flags; 291 int lease_shared_gen; 292 u32 lease_gen; 293 u32 lease_seq; 294 unsigned long lease_renew_after, lease_renew_from; 295 unsigned long time; 296 u64 offset; 297 }; 298 299 #define CEPH_DENTRY_REFERENCED (1 << 0) 300 #define CEPH_DENTRY_LEASE_LIST (1 << 1) 301 #define CEPH_DENTRY_SHRINK_LIST (1 << 2) 302 #define CEPH_DENTRY_PRIMARY_LINK (1 << 3) 303 #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4) 304 #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT) 305 #define CEPH_DENTRY_ASYNC_CREATE_BIT (5) 306 #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT) 307 308 struct ceph_inode_xattrs_info { 309 /* 310 * (still encoded) xattr blob. we avoid the overhead of parsing 311 * this until someone actually calls getxattr, etc. 312 * 313 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 314 * NULL means we don't know. 315 */ 316 struct ceph_buffer *blob, *prealloc_blob; 317 318 struct rb_root index; 319 bool dirty; 320 int count; 321 int names_size; 322 int vals_size; 323 u64 version, index_version; 324 }; 325 326 /* 327 * Ceph inode. 328 */ 329 struct ceph_inode_info { 330 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 331 struct ceph_vino i_vino; /* ceph ino + snap */ 332 333 spinlock_t i_ceph_lock; 334 335 u64 i_version; 336 u64 i_inline_version; 337 u32 i_time_warp_seq; 338 339 unsigned long i_ceph_flags; 340 atomic64_t i_release_count; 341 atomic64_t i_ordered_count; 342 atomic64_t i_complete_seq[2]; 343 344 struct ceph_dir_layout i_dir_layout; 345 struct ceph_file_layout i_layout; 346 struct ceph_file_layout i_cached_layout; // for async creates 347 char *i_symlink; 348 349 /* for dirs */ 350 struct timespec64 i_rctime; 351 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps; 352 u64 i_files, i_subdirs; 353 354 /* quotas */ 355 u64 i_max_bytes, i_max_files; 356 357 s32 i_dir_pin; 358 359 struct rb_root i_fragtree; 360 int i_fragtree_nsplits; 361 struct mutex i_fragtree_mutex; 362 363 struct ceph_inode_xattrs_info i_xattrs; 364 365 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 366 * s_mutex. */ 367 struct rb_root i_caps; /* cap list */ 368 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 369 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 370 371 /* 372 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 373 * is protected by the mdsc->cap_dirty_lock, but each individual item 374 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 375 * requires the mdsc->cap_dirty_lock. List presence for an item can 376 * be tested under the i_ceph_lock. Changing anything requires both. 377 */ 378 struct list_head i_dirty_item; 379 380 /* 381 * Link to session's s_cap_flushing list. Protected in a similar 382 * fashion to i_dirty_item, but also by the s_mutex for changes. The 383 * s_cap_flushing list can be walked while holding either the s_mutex 384 * or msdc->cap_dirty_lock. List presence can also be checked while 385 * holding the i_ceph_lock for this inode. 386 */ 387 struct list_head i_flushing_item; 388 389 /* we need to track cap writeback on a per-cap-bit basis, to allow 390 * overlapping, pipelined cap flushes to the mds. we can probably 391 * reduce the tid to 8 bits if we're concerned about inode size. */ 392 struct ceph_cap_flush *i_prealloc_cap_flush; 393 struct list_head i_cap_flush_list; 394 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 395 unsigned long i_hold_caps_max; /* jiffies */ 396 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 397 struct ceph_cap_reservation i_cap_migration_resv; 398 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 399 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 400 dirty|flushing caps */ 401 unsigned i_snap_caps; /* cap bits for snapped files */ 402 403 unsigned long i_last_rd; 404 unsigned long i_last_wr; 405 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 406 407 struct mutex i_truncate_mutex; 408 u32 i_truncate_seq; /* last truncate to smaller size */ 409 u64 i_truncate_size; /* and the size we last truncated down to */ 410 int i_truncate_pending; /* still need to call vmtruncate */ 411 412 u64 i_max_size; /* max file size authorized by mds */ 413 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 414 u64 i_wanted_max_size; /* offset we'd like to write too */ 415 u64 i_requested_max_size; /* max_size we've requested */ 416 417 /* held references to caps */ 418 int i_pin_ref; 419 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 420 int i_wrbuffer_ref, i_wrbuffer_ref_head; 421 atomic_t i_filelock_ref; 422 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 423 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 424 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 425 426 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 427 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 428 spinlock_t i_unsafe_lock; 429 430 union { 431 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 432 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 433 }; 434 struct list_head i_snap_realm_item; 435 struct list_head i_snap_flush_item; 436 struct timespec64 i_btime; 437 struct timespec64 i_snap_btime; 438 439 struct work_struct i_work; 440 unsigned long i_work_mask; 441 }; 442 443 static inline struct ceph_inode_info * 444 ceph_inode(const struct inode *inode) 445 { 446 return container_of(inode, struct ceph_inode_info, netfs.inode); 447 } 448 449 static inline struct ceph_fs_client * 450 ceph_inode_to_client(const struct inode *inode) 451 { 452 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 453 } 454 455 static inline struct ceph_fs_client * 456 ceph_sb_to_client(const struct super_block *sb) 457 { 458 return (struct ceph_fs_client *)sb->s_fs_info; 459 } 460 461 static inline struct ceph_mds_client * 462 ceph_sb_to_mdsc(const struct super_block *sb) 463 { 464 return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc; 465 } 466 467 static inline struct ceph_vino 468 ceph_vino(const struct inode *inode) 469 { 470 return ceph_inode(inode)->i_vino; 471 } 472 473 static inline u32 ceph_ino_to_ino32(u64 vino) 474 { 475 u32 ino = vino & 0xffffffff; 476 ino ^= vino >> 32; 477 if (!ino) 478 ino = 2; 479 return ino; 480 } 481 482 /* 483 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 484 * some arches. We generally do not use this value inside the ceph driver, but 485 * we do want to set it to something, so that generic vfs code has an 486 * appropriate value for tracepoints and the like. 487 */ 488 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 489 { 490 if (sizeof(ino_t) == sizeof(u32)) 491 return ceph_ino_to_ino32(vino.ino); 492 return (ino_t)vino.ino; 493 } 494 495 /* for printf-style formatting */ 496 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 497 498 static inline u64 ceph_ino(struct inode *inode) 499 { 500 return ceph_inode(inode)->i_vino.ino; 501 } 502 503 static inline u64 ceph_snap(struct inode *inode) 504 { 505 return ceph_inode(inode)->i_vino.snap; 506 } 507 508 /** 509 * ceph_present_ino - format an inode number for presentation to userland 510 * @sb: superblock where the inode lives 511 * @ino: inode number to (possibly) convert 512 * 513 * If the user mounted with the ino32 option, then the 64-bit value needs 514 * to be converted to something that can fit inside 32 bits. Note that 515 * internal kernel code never uses this value, so this is entirely for 516 * userland consumption. 517 */ 518 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 519 { 520 if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))) 521 return ceph_ino_to_ino32(ino); 522 return ino; 523 } 524 525 static inline u64 ceph_present_inode(struct inode *inode) 526 { 527 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 528 } 529 530 static inline int ceph_ino_compare(struct inode *inode, void *data) 531 { 532 struct ceph_vino *pvino = (struct ceph_vino *)data; 533 struct ceph_inode_info *ci = ceph_inode(inode); 534 return ci->i_vino.ino == pvino->ino && 535 ci->i_vino.snap == pvino->snap; 536 } 537 538 /* 539 * The MDS reserves a set of inodes for its own usage. These should never 540 * be accessible by clients, and so the MDS has no reason to ever hand these 541 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE. 542 * 543 * These come from src/mds/mdstypes.h in the ceph sources. 544 */ 545 #define CEPH_MAX_MDS 0x100 546 #define CEPH_NUM_STRAY 10 547 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS) 548 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS) 549 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY)) 550 551 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino) 552 { 553 if (vino.ino >= CEPH_INO_SYSTEM_BASE || 554 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET) 555 return false; 556 557 /* Don't warn on mdsdirs */ 558 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET, 559 "Attempt to access reserved inode number 0x%llx", 560 vino.ino); 561 return true; 562 } 563 564 static inline struct inode *ceph_find_inode(struct super_block *sb, 565 struct ceph_vino vino) 566 { 567 if (ceph_vino_is_reserved(vino)) 568 return NULL; 569 570 /* 571 * NB: The hashval will be run through the fs/inode.c hash function 572 * anyway, so there is no need to squash the inode number down to 573 * 32-bits first. Just use low-order bits on arches with 32-bit long. 574 */ 575 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 576 } 577 578 579 /* 580 * Ceph inode. 581 */ 582 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ 583 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ 584 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ 585 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ 586 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ 587 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ 588 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ 589 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ 590 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ 591 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ 592 #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */ 593 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 594 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) 595 #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */ 596 597 /* 598 * Masks of ceph inode work. 599 */ 600 #define CEPH_I_WORK_WRITEBACK 0 601 #define CEPH_I_WORK_INVALIDATE_PAGES 1 602 #define CEPH_I_WORK_VMTRUNCATE 2 603 #define CEPH_I_WORK_CHECK_CAPS 3 604 #define CEPH_I_WORK_FLUSH_SNAPS 4 605 606 /* 607 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 608 * and then clear it when they start succeeding. Note that we do a lockless 609 * check first, and only take the lock if it looks like it needs to be changed. 610 * The write submission code just takes this as a hint, so we're not too 611 * worried if a few slip through in either direction. 612 */ 613 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 614 { 615 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 616 spin_lock(&ci->i_ceph_lock); 617 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 618 spin_unlock(&ci->i_ceph_lock); 619 } 620 } 621 622 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 623 { 624 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 625 spin_lock(&ci->i_ceph_lock); 626 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 627 spin_unlock(&ci->i_ceph_lock); 628 } 629 } 630 631 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 632 long long release_count, 633 long long ordered_count) 634 { 635 /* 636 * Makes sure operations that setup readdir cache (update page 637 * cache and i_size) are strongly ordered w.r.t. the following 638 * atomic64_set() operations. 639 */ 640 smp_mb(); 641 atomic64_set(&ci->i_complete_seq[0], release_count); 642 atomic64_set(&ci->i_complete_seq[1], ordered_count); 643 } 644 645 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 646 { 647 atomic64_inc(&ci->i_release_count); 648 } 649 650 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 651 { 652 atomic64_inc(&ci->i_ordered_count); 653 } 654 655 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 656 { 657 return atomic64_read(&ci->i_complete_seq[0]) == 658 atomic64_read(&ci->i_release_count); 659 } 660 661 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 662 { 663 return atomic64_read(&ci->i_complete_seq[0]) == 664 atomic64_read(&ci->i_release_count) && 665 atomic64_read(&ci->i_complete_seq[1]) == 666 atomic64_read(&ci->i_ordered_count); 667 } 668 669 static inline void ceph_dir_clear_complete(struct inode *inode) 670 { 671 __ceph_dir_clear_complete(ceph_inode(inode)); 672 } 673 674 static inline void ceph_dir_clear_ordered(struct inode *inode) 675 { 676 __ceph_dir_clear_ordered(ceph_inode(inode)); 677 } 678 679 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 680 { 681 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 682 smp_rmb(); 683 return ret; 684 } 685 686 /* find a specific frag @f */ 687 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 688 u32 f); 689 690 /* 691 * choose fragment for value @v. copy frag content to pfrag, if leaf 692 * exists 693 */ 694 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 695 struct ceph_inode_frag *pfrag, 696 int *found); 697 698 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 699 { 700 return (struct ceph_dentry_info *)dentry->d_fsdata; 701 } 702 703 /* 704 * caps helpers 705 */ 706 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 707 { 708 return !RB_EMPTY_ROOT(&ci->i_caps); 709 } 710 711 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 712 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 713 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 714 int t); 715 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 716 struct ceph_cap *cap); 717 718 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 719 { 720 int issued; 721 spin_lock(&ci->i_ceph_lock); 722 issued = __ceph_caps_issued(ci, NULL); 723 spin_unlock(&ci->i_ceph_lock); 724 return issued; 725 } 726 727 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 728 int mask, int touch) 729 { 730 int r; 731 spin_lock(&ci->i_ceph_lock); 732 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 733 spin_unlock(&ci->i_ceph_lock); 734 return r; 735 } 736 737 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 738 { 739 return ci->i_dirty_caps | ci->i_flushing_caps; 740 } 741 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 742 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 743 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 744 struct ceph_cap_flush **pcf); 745 746 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 747 struct ceph_cap *ocap, int mask); 748 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 749 extern int __ceph_caps_used(struct ceph_inode_info *ci); 750 751 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 752 { 753 return ci->i_nr_by_mode[0]; 754 } 755 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 756 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 757 758 /* what the mds thinks we want */ 759 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 760 761 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 762 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 763 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 764 struct ceph_mount_options *fsopt); 765 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 766 struct ceph_cap_reservation *ctx, int need); 767 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 768 struct ceph_cap_reservation *ctx); 769 extern void ceph_reservation_status(struct ceph_fs_client *client, 770 int *total, int *avail, int *used, 771 int *reserved, int *min); 772 extern void change_auth_cap_ses(struct ceph_inode_info *ci, 773 struct ceph_mds_session *session); 774 775 776 777 /* 778 * we keep buffered readdir results attached to file->private_data 779 */ 780 #define CEPH_F_SYNC 1 781 #define CEPH_F_ATEND 2 782 783 struct ceph_file_info { 784 short fmode; /* initialized on open */ 785 short flags; /* CEPH_F_* */ 786 787 spinlock_t rw_contexts_lock; 788 struct list_head rw_contexts; 789 790 u32 filp_gen; 791 atomic_t num_locks; 792 }; 793 794 struct ceph_dir_file_info { 795 struct ceph_file_info file_info; 796 797 /* readdir: position within the dir */ 798 u32 frag; 799 struct ceph_mds_request *last_readdir; 800 801 /* readdir: position within a frag */ 802 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 803 char *last_name; /* last entry in previous chunk */ 804 long long dir_release_count; 805 long long dir_ordered_count; 806 int readdir_cache_idx; 807 808 /* used for -o dirstat read() on directory thing */ 809 char *dir_info; 810 int dir_info_len; 811 }; 812 813 struct ceph_rw_context { 814 struct list_head list; 815 struct task_struct *thread; 816 int caps; 817 }; 818 819 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 820 struct ceph_rw_context _name = { \ 821 .thread = current, \ 822 .caps = _caps, \ 823 } 824 825 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 826 struct ceph_rw_context *ctx) 827 { 828 spin_lock(&cf->rw_contexts_lock); 829 list_add(&ctx->list, &cf->rw_contexts); 830 spin_unlock(&cf->rw_contexts_lock); 831 } 832 833 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 834 struct ceph_rw_context *ctx) 835 { 836 spin_lock(&cf->rw_contexts_lock); 837 list_del(&ctx->list); 838 spin_unlock(&cf->rw_contexts_lock); 839 } 840 841 static inline struct ceph_rw_context* 842 ceph_find_rw_context(struct ceph_file_info *cf) 843 { 844 struct ceph_rw_context *ctx, *found = NULL; 845 spin_lock(&cf->rw_contexts_lock); 846 list_for_each_entry(ctx, &cf->rw_contexts, list) { 847 if (ctx->thread == current) { 848 found = ctx; 849 break; 850 } 851 } 852 spin_unlock(&cf->rw_contexts_lock); 853 return found; 854 } 855 856 struct ceph_readdir_cache_control { 857 struct page *page; 858 struct dentry **dentries; 859 int index; 860 }; 861 862 /* 863 * A "snap realm" describes a subset of the file hierarchy sharing 864 * the same set of snapshots that apply to it. The realms themselves 865 * are organized into a hierarchy, such that children inherit (some of) 866 * the snapshots of their parents. 867 * 868 * All inodes within the realm that have capabilities are linked into a 869 * per-realm list. 870 */ 871 struct ceph_snap_realm { 872 u64 ino; 873 struct inode *inode; 874 atomic_t nref; 875 struct rb_node node; 876 877 u64 created, seq; 878 u64 parent_ino; 879 u64 parent_since; /* snapid when our current parent became so */ 880 881 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 882 u32 num_prior_parent_snaps; /* had prior to parent_since */ 883 u64 *snaps; /* snaps specific to this realm */ 884 u32 num_snaps; 885 886 struct ceph_snap_realm *parent; 887 struct list_head children; /* list of child realms */ 888 struct list_head child_item; 889 890 struct list_head empty_item; /* if i have ref==0 */ 891 892 struct list_head dirty_item; /* if realm needs new context */ 893 894 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */ 895 896 /* the current set of snaps for this realm */ 897 struct ceph_snap_context *cached_context; 898 899 struct list_head inodes_with_caps; 900 spinlock_t inodes_with_caps_lock; 901 }; 902 903 static inline int default_congestion_kb(void) 904 { 905 int congestion_kb; 906 907 /* 908 * Copied from NFS 909 * 910 * congestion size, scale with available memory. 911 * 912 * 64MB: 8192k 913 * 128MB: 11585k 914 * 256MB: 16384k 915 * 512MB: 23170k 916 * 1GB: 32768k 917 * 2GB: 46340k 918 * 4GB: 65536k 919 * 8GB: 92681k 920 * 16GB: 131072k 921 * 922 * This allows larger machines to have larger/more transfers. 923 * Limit the default to 256M 924 */ 925 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 926 if (congestion_kb > 256*1024) 927 congestion_kb = 256*1024; 928 929 return congestion_kb; 930 } 931 932 933 /* super.c */ 934 extern int ceph_force_reconnect(struct super_block *sb); 935 /* snap.c */ 936 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 937 u64 ino); 938 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 939 struct ceph_snap_realm *realm); 940 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 941 struct ceph_snap_realm *realm); 942 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 943 void *p, void *e, bool deletion, 944 struct ceph_snap_realm **realm_ret); 945 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm); 946 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 947 struct ceph_mds_session *session, 948 struct ceph_msg *msg); 949 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 950 struct ceph_cap_snap *capsnap); 951 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc); 952 953 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 954 u64 snap); 955 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 956 struct ceph_snapid_map *sm); 957 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 958 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 959 void ceph_umount_begin(struct super_block *sb); 960 961 962 /* 963 * a cap_snap is "pending" if it is still awaiting an in-progress 964 * sync write (that may/may not still update size, mtime, etc.). 965 */ 966 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 967 { 968 return !list_empty(&ci->i_cap_snaps) && 969 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 970 ci_item)->writing; 971 } 972 973 /* inode.c */ 974 struct ceph_mds_reply_info_in; 975 struct ceph_mds_reply_dirfrag; 976 977 extern const struct inode_operations ceph_file_iops; 978 979 extern struct inode *ceph_alloc_inode(struct super_block *sb); 980 extern void ceph_evict_inode(struct inode *inode); 981 extern void ceph_free_inode(struct inode *inode); 982 983 extern struct inode *ceph_get_inode(struct super_block *sb, 984 struct ceph_vino vino); 985 extern struct inode *ceph_get_snapdir(struct inode *parent); 986 extern int ceph_fill_file_size(struct inode *inode, int issued, 987 u32 truncate_seq, u64 truncate_size, u64 size); 988 extern void ceph_fill_file_time(struct inode *inode, int issued, 989 u64 time_warp_seq, struct timespec64 *ctime, 990 struct timespec64 *mtime, 991 struct timespec64 *atime); 992 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 993 struct ceph_mds_reply_info_in *iinfo, 994 struct ceph_mds_reply_dirfrag *dirinfo, 995 struct ceph_mds_session *session, int cap_fmode, 996 struct ceph_cap_reservation *caps_reservation); 997 extern int ceph_fill_trace(struct super_block *sb, 998 struct ceph_mds_request *req); 999 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1000 struct ceph_mds_session *session); 1001 1002 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 1003 1004 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 1005 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 1006 1007 void ceph_queue_inode_work(struct inode *inode, int work_bit); 1008 1009 static inline void ceph_queue_vmtruncate(struct inode *inode) 1010 { 1011 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); 1012 } 1013 1014 static inline void ceph_queue_invalidate(struct inode *inode) 1015 { 1016 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); 1017 } 1018 1019 static inline void ceph_queue_writeback(struct inode *inode) 1020 { 1021 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); 1022 } 1023 1024 static inline void ceph_queue_check_caps(struct inode *inode) 1025 { 1026 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); 1027 } 1028 1029 static inline void ceph_queue_flush_snaps(struct inode *inode) 1030 { 1031 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); 1032 } 1033 1034 extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask); 1035 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 1036 int mask, bool force); 1037 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 1038 { 1039 return __ceph_do_getattr(inode, NULL, mask, force); 1040 } 1041 extern int ceph_permission(struct user_namespace *mnt_userns, 1042 struct inode *inode, int mask); 1043 extern int __ceph_setattr(struct inode *inode, struct iattr *attr); 1044 extern int ceph_setattr(struct user_namespace *mnt_userns, 1045 struct dentry *dentry, struct iattr *attr); 1046 extern int ceph_getattr(struct user_namespace *mnt_userns, 1047 const struct path *path, struct kstat *stat, 1048 u32 request_mask, unsigned int flags); 1049 void ceph_inode_shutdown(struct inode *inode); 1050 1051 static inline bool ceph_inode_is_shutdown(struct inode *inode) 1052 { 1053 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags); 1054 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 1055 int state = READ_ONCE(fsc->mount_state); 1056 1057 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN; 1058 } 1059 1060 /* xattr.c */ 1061 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 1062 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size); 1063 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 1064 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 1065 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 1066 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 1067 extern const struct xattr_handler *ceph_xattr_handlers[]; 1068 1069 struct ceph_acl_sec_ctx { 1070 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1071 void *default_acl; 1072 void *acl; 1073 #endif 1074 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1075 void *sec_ctx; 1076 u32 sec_ctxlen; 1077 #endif 1078 struct ceph_pagelist *pagelist; 1079 }; 1080 1081 #ifdef CONFIG_SECURITY 1082 extern bool ceph_security_xattr_deadlock(struct inode *in); 1083 extern bool ceph_security_xattr_wanted(struct inode *in); 1084 #else 1085 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1086 { 1087 return false; 1088 } 1089 static inline bool ceph_security_xattr_wanted(struct inode *in) 1090 { 1091 return false; 1092 } 1093 #endif 1094 1095 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1096 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1097 struct ceph_acl_sec_ctx *ctx); 1098 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1099 { 1100 security_inode_invalidate_secctx(inode); 1101 } 1102 #else 1103 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1104 struct ceph_acl_sec_ctx *ctx) 1105 { 1106 return 0; 1107 } 1108 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1109 { 1110 } 1111 #endif 1112 1113 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1114 1115 /* acl.c */ 1116 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1117 1118 struct posix_acl *ceph_get_acl(struct inode *, int, bool); 1119 int ceph_set_acl(struct user_namespace *mnt_userns, 1120 struct inode *inode, struct posix_acl *acl, int type); 1121 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1122 struct ceph_acl_sec_ctx *as_ctx); 1123 void ceph_init_inode_acls(struct inode *inode, 1124 struct ceph_acl_sec_ctx *as_ctx); 1125 1126 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1127 { 1128 forget_all_cached_acls(inode); 1129 } 1130 1131 #else 1132 1133 #define ceph_get_acl NULL 1134 #define ceph_set_acl NULL 1135 1136 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1137 struct ceph_acl_sec_ctx *as_ctx) 1138 { 1139 return 0; 1140 } 1141 static inline void ceph_init_inode_acls(struct inode *inode, 1142 struct ceph_acl_sec_ctx *as_ctx) 1143 { 1144 } 1145 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 1146 { 1147 return 0; 1148 } 1149 1150 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1151 { 1152 } 1153 1154 #endif 1155 1156 /* caps.c */ 1157 extern const char *ceph_cap_string(int c); 1158 extern void ceph_handle_caps(struct ceph_mds_session *session, 1159 struct ceph_msg *msg); 1160 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1161 struct ceph_cap_reservation *ctx); 1162 extern void ceph_add_cap(struct inode *inode, 1163 struct ceph_mds_session *session, u64 cap_id, 1164 unsigned issued, unsigned wanted, 1165 unsigned cap, unsigned seq, u64 realmino, int flags, 1166 struct ceph_cap **new_cap); 1167 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1168 extern void ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1169 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1170 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1171 struct ceph_cap *cap); 1172 extern int ceph_is_any_caps(struct inode *inode); 1173 1174 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1175 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1176 int datasync); 1177 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1178 struct ceph_mds_session *session); 1179 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1180 struct ceph_mds_session *session); 1181 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1182 struct ceph_inode_info *ci); 1183 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1184 int mds); 1185 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1186 bool snap_rwsem_locked); 1187 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1188 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1189 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); 1190 extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, 1191 int had); 1192 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1193 struct ceph_snap_context *snapc); 1194 extern void __ceph_remove_capsnap(struct inode *inode, 1195 struct ceph_cap_snap *capsnap, 1196 bool *wake_ci, bool *wake_mdsc); 1197 extern void ceph_remove_capsnap(struct inode *inode, 1198 struct ceph_cap_snap *capsnap, 1199 bool *wake_ci, bool *wake_mdsc); 1200 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1201 struct ceph_mds_session **psession); 1202 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1203 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 1204 struct ceph_mds_session *session); 1205 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1206 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1207 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1208 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1209 int mds, int drop, int unless, int force); 1210 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1211 struct inode *dir, 1212 int mds, int drop, int unless); 1213 1214 extern int ceph_get_caps(struct file *filp, int need, int want, 1215 loff_t endoff, int *got); 1216 extern int ceph_try_get_caps(struct inode *inode, 1217 int need, int want, bool nonblock, int *got); 1218 1219 /* for counting open files by mode */ 1220 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1221 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1222 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1223 struct ceph_mds_client *mdsc, int fmode); 1224 1225 /* addr.c */ 1226 extern const struct address_space_operations ceph_aops; 1227 extern const struct netfs_request_ops ceph_netfs_ops; 1228 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 1229 extern int ceph_uninline_data(struct file *file); 1230 extern int ceph_pool_perm_check(struct inode *inode, int need); 1231 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1232 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); 1233 1234 static inline bool ceph_has_inline_data(struct ceph_inode_info *ci) 1235 { 1236 if (ci->i_inline_version == CEPH_INLINE_NONE || 1237 ci->i_inline_version == 1) /* initial version, no data */ 1238 return false; 1239 return true; 1240 } 1241 1242 /* file.c */ 1243 extern const struct file_operations ceph_file_fops; 1244 1245 extern int ceph_renew_caps(struct inode *inode, int fmode); 1246 extern int ceph_open(struct inode *inode, struct file *file); 1247 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1248 struct file *file, unsigned flags, umode_t mode); 1249 extern int ceph_release(struct inode *inode, struct file *filp); 1250 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1251 char *data, size_t len); 1252 1253 /* dir.c */ 1254 extern const struct file_operations ceph_dir_fops; 1255 extern const struct file_operations ceph_snapdir_fops; 1256 extern const struct inode_operations ceph_dir_iops; 1257 extern const struct inode_operations ceph_snapdir_iops; 1258 extern const struct dentry_operations ceph_dentry_ops; 1259 1260 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1261 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1262 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req, 1263 struct dentry *dentry); 1264 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1265 struct dentry *dentry, int err); 1266 1267 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1268 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1269 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1270 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1271 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1272 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1273 1274 /* ioctl.c */ 1275 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1276 1277 /* export.c */ 1278 extern const struct export_operations ceph_export_ops; 1279 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1280 1281 /* locks.c */ 1282 extern __init void ceph_flock_init(void); 1283 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1284 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1285 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1286 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1287 struct ceph_filelock *flocks, 1288 int num_fcntl_locks, 1289 int num_flock_locks); 1290 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1291 struct ceph_pagelist *pagelist, 1292 int num_fcntl_locks, int num_flock_locks); 1293 1294 /* debugfs.c */ 1295 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1296 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1297 1298 /* quota.c */ 1299 1300 enum quota_get_realm { 1301 QUOTA_GET_MAX_FILES, 1302 QUOTA_GET_MAX_BYTES, 1303 QUOTA_GET_ANY 1304 }; 1305 1306 static inline bool __ceph_has_quota(struct ceph_inode_info *ci, 1307 enum quota_get_realm which) 1308 { 1309 bool has_quota = false; 1310 1311 switch (which) { 1312 case QUOTA_GET_MAX_BYTES: 1313 has_quota = !!ci->i_max_bytes; 1314 break; 1315 case QUOTA_GET_MAX_FILES: 1316 has_quota = !!ci->i_max_files; 1317 break; 1318 default: 1319 has_quota = !!(ci->i_max_files || ci->i_max_bytes); 1320 } 1321 return has_quota; 1322 } 1323 1324 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1325 1326 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1327 u64 max_bytes, u64 max_files) 1328 { 1329 bool had_quota, has_quota; 1330 had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1331 ci->i_max_bytes = max_bytes; 1332 ci->i_max_files = max_files; 1333 has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1334 1335 if (had_quota != has_quota) 1336 ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota); 1337 } 1338 1339 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1340 struct ceph_mds_session *session, 1341 struct ceph_msg *msg); 1342 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1343 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1344 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1345 loff_t newlen); 1346 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1347 loff_t newlen); 1348 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1349 struct kstatfs *buf); 1350 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1351 1352 #endif /* _FS_CEPH_SUPER_H */ 1353