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 /* mount state */ 104 enum { 105 CEPH_MOUNT_MOUNTING, 106 CEPH_MOUNT_MOUNTED, 107 CEPH_MOUNT_UNMOUNTING, 108 CEPH_MOUNT_UNMOUNTED, 109 CEPH_MOUNT_SHUTDOWN, 110 CEPH_MOUNT_RECOVER, 111 CEPH_MOUNT_FENCE_IO, 112 }; 113 114 #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8 115 116 struct ceph_fs_client { 117 struct super_block *sb; 118 119 struct list_head metric_wakeup; 120 121 struct ceph_mount_options *mount_options; 122 struct ceph_client *client; 123 124 int mount_state; 125 126 bool blocklisted; 127 128 bool have_copy_from2; 129 130 u32 filp_gen; 131 loff_t max_file_size; 132 133 struct ceph_mds_client *mdsc; 134 135 atomic_long_t writeback_count; 136 bool write_congested; 137 138 struct workqueue_struct *inode_wq; 139 struct workqueue_struct *cap_wq; 140 141 DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS); 142 spinlock_t async_unlink_conflict_lock; 143 144 #ifdef CONFIG_DEBUG_FS 145 struct dentry *debugfs_dentry_lru, *debugfs_caps; 146 struct dentry *debugfs_congestion_kb; 147 struct dentry *debugfs_bdi; 148 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 149 struct dentry *debugfs_status; 150 struct dentry *debugfs_mds_sessions; 151 struct dentry *debugfs_metrics_dir; 152 #endif 153 154 #ifdef CONFIG_CEPH_FSCACHE 155 struct fscache_volume *fscache; 156 #endif 157 }; 158 159 160 /* 161 * File i/o capability. This tracks shared state with the metadata 162 * server that allows us to cache or writeback attributes or to read 163 * and write data. For any given inode, we should have one or more 164 * capabilities, one issued by each metadata server, and our 165 * cumulative access is the OR of all issued capabilities. 166 * 167 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 168 * session capability lists. 169 */ 170 struct ceph_cap { 171 struct ceph_inode_info *ci; 172 struct rb_node ci_node; /* per-ci cap tree */ 173 struct ceph_mds_session *session; 174 struct list_head session_caps; /* per-session caplist */ 175 u64 cap_id; /* unique cap id (mds provided) */ 176 union { 177 /* in-use caps */ 178 struct { 179 int issued; /* latest, from the mds */ 180 int implemented; /* implemented superset of 181 issued (for revocation) */ 182 int mds; /* mds index for this cap */ 183 int mds_wanted; /* caps wanted from this mds */ 184 }; 185 /* caps to release */ 186 struct { 187 u64 cap_ino; 188 int queue_release; 189 }; 190 }; 191 u32 seq, issue_seq, mseq; 192 u32 cap_gen; /* active/stale cycle */ 193 unsigned long last_used; 194 struct list_head caps_item; 195 }; 196 197 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 198 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 199 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 200 201 struct ceph_cap_flush { 202 u64 tid; 203 int caps; 204 bool wake; /* wake up flush waiters when finish ? */ 205 bool is_capsnap; /* true means capsnap */ 206 struct list_head g_list; // global 207 struct list_head i_list; // per inode 208 }; 209 210 /* 211 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 212 * we first complete any in-process sync writes and writeback any dirty 213 * data before flushing the snapped state (tracked here) back to the MDS. 214 */ 215 struct ceph_cap_snap { 216 refcount_t nref; 217 struct list_head ci_item; 218 219 struct ceph_cap_flush cap_flush; 220 221 u64 follows; 222 int issued, dirty; 223 struct ceph_snap_context *context; 224 225 umode_t mode; 226 kuid_t uid; 227 kgid_t gid; 228 229 struct ceph_buffer *xattr_blob; 230 u64 xattr_version; 231 232 u64 size; 233 u64 change_attr; 234 struct timespec64 mtime, atime, ctime, btime; 235 u64 time_warp_seq; 236 u64 truncate_size; 237 u32 truncate_seq; 238 int writing; /* a sync write is still in progress */ 239 int dirty_pages; /* dirty pages awaiting writeback */ 240 bool inline_data; 241 bool need_flush; 242 }; 243 244 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 245 { 246 if (refcount_dec_and_test(&capsnap->nref)) { 247 if (capsnap->xattr_blob) 248 ceph_buffer_put(capsnap->xattr_blob); 249 kmem_cache_free(ceph_cap_snap_cachep, capsnap); 250 } 251 } 252 253 /* 254 * The frag tree describes how a directory is fragmented, potentially across 255 * multiple metadata servers. It is also used to indicate points where 256 * metadata authority is delegated, and whether/where metadata is replicated. 257 * 258 * A _leaf_ frag will be present in the i_fragtree IFF there is 259 * delegation info. That is, if mds >= 0 || ndist > 0. 260 */ 261 #define CEPH_MAX_DIRFRAG_REP 4 262 263 struct ceph_inode_frag { 264 struct rb_node node; 265 266 /* fragtree state */ 267 u32 frag; 268 int split_by; /* i.e. 2^(split_by) children */ 269 270 /* delegation and replication info */ 271 int mds; /* -1 if same authority as parent */ 272 int ndist; /* >0 if replicated */ 273 int dist[CEPH_MAX_DIRFRAG_REP]; 274 }; 275 276 /* 277 * We cache inode xattrs as an encoded blob until they are first used, 278 * at which point we parse them into an rbtree. 279 */ 280 struct ceph_inode_xattr { 281 struct rb_node node; 282 283 const char *name; 284 int name_len; 285 const char *val; 286 int val_len; 287 int dirty; 288 289 int should_free_name; 290 int should_free_val; 291 }; 292 293 /* 294 * Ceph dentry state 295 */ 296 struct ceph_dentry_info { 297 struct dentry *dentry; 298 struct ceph_mds_session *lease_session; 299 struct list_head lease_list; 300 struct hlist_node hnode; 301 unsigned long flags; 302 int lease_shared_gen; 303 u32 lease_gen; 304 u32 lease_seq; 305 unsigned long lease_renew_after, lease_renew_from; 306 unsigned long time; 307 u64 offset; 308 }; 309 310 #define CEPH_DENTRY_REFERENCED (1 << 0) 311 #define CEPH_DENTRY_LEASE_LIST (1 << 1) 312 #define CEPH_DENTRY_SHRINK_LIST (1 << 2) 313 #define CEPH_DENTRY_PRIMARY_LINK (1 << 3) 314 #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4) 315 #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT) 316 #define CEPH_DENTRY_ASYNC_CREATE_BIT (5) 317 #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT) 318 319 struct ceph_inode_xattrs_info { 320 /* 321 * (still encoded) xattr blob. we avoid the overhead of parsing 322 * this until someone actually calls getxattr, etc. 323 * 324 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 325 * NULL means we don't know. 326 */ 327 struct ceph_buffer *blob, *prealloc_blob; 328 329 struct rb_root index; 330 bool dirty; 331 int count; 332 int names_size; 333 int vals_size; 334 u64 version, index_version; 335 }; 336 337 /* 338 * Ceph inode. 339 */ 340 struct ceph_inode_info { 341 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 342 struct ceph_vino i_vino; /* ceph ino + snap */ 343 344 spinlock_t i_ceph_lock; 345 346 u64 i_version; 347 u64 i_inline_version; 348 u32 i_time_warp_seq; 349 350 unsigned long i_ceph_flags; 351 atomic64_t i_release_count; 352 atomic64_t i_ordered_count; 353 atomic64_t i_complete_seq[2]; 354 355 struct ceph_dir_layout i_dir_layout; 356 struct ceph_file_layout i_layout; 357 struct ceph_file_layout i_cached_layout; // for async creates 358 char *i_symlink; 359 360 /* for dirs */ 361 struct timespec64 i_rctime; 362 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps; 363 u64 i_files, i_subdirs; 364 365 /* quotas */ 366 u64 i_max_bytes, i_max_files; 367 368 s32 i_dir_pin; 369 370 struct rb_root i_fragtree; 371 int i_fragtree_nsplits; 372 struct mutex i_fragtree_mutex; 373 374 struct ceph_inode_xattrs_info i_xattrs; 375 376 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 377 * s_mutex. */ 378 struct rb_root i_caps; /* cap list */ 379 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 380 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 381 382 /* 383 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 384 * is protected by the mdsc->cap_dirty_lock, but each individual item 385 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 386 * requires the mdsc->cap_dirty_lock. List presence for an item can 387 * be tested under the i_ceph_lock. Changing anything requires both. 388 */ 389 struct list_head i_dirty_item; 390 391 /* 392 * Link to session's s_cap_flushing list. Protected in a similar 393 * fashion to i_dirty_item, but also by the s_mutex for changes. The 394 * s_cap_flushing list can be walked while holding either the s_mutex 395 * or msdc->cap_dirty_lock. List presence can also be checked while 396 * holding the i_ceph_lock for this inode. 397 */ 398 struct list_head i_flushing_item; 399 400 /* we need to track cap writeback on a per-cap-bit basis, to allow 401 * overlapping, pipelined cap flushes to the mds. we can probably 402 * reduce the tid to 8 bits if we're concerned about inode size. */ 403 struct ceph_cap_flush *i_prealloc_cap_flush; 404 struct list_head i_cap_flush_list; 405 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 406 unsigned long i_hold_caps_max; /* jiffies */ 407 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 408 struct ceph_cap_reservation i_cap_migration_resv; 409 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 410 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 411 dirty|flushing caps */ 412 unsigned i_snap_caps; /* cap bits for snapped files */ 413 414 unsigned long i_last_rd; 415 unsigned long i_last_wr; 416 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 417 418 struct mutex i_truncate_mutex; 419 u32 i_truncate_seq; /* last truncate to smaller size */ 420 u64 i_truncate_size; /* and the size we last truncated down to */ 421 int i_truncate_pending; /* still need to call vmtruncate */ 422 423 u64 i_max_size; /* max file size authorized by mds */ 424 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 425 u64 i_wanted_max_size; /* offset we'd like to write too */ 426 u64 i_requested_max_size; /* max_size we've requested */ 427 428 /* held references to caps */ 429 int i_pin_ref; 430 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 431 int i_wrbuffer_ref, i_wrbuffer_ref_head; 432 atomic_t i_filelock_ref; 433 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 434 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 435 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 436 437 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 438 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 439 spinlock_t i_unsafe_lock; 440 441 union { 442 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 443 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 444 }; 445 struct list_head i_snap_realm_item; 446 struct list_head i_snap_flush_item; 447 struct timespec64 i_btime; 448 struct timespec64 i_snap_btime; 449 450 struct work_struct i_work; 451 unsigned long i_work_mask; 452 }; 453 454 struct ceph_netfs_request_data { 455 int caps; 456 457 /* 458 * Maximum size of a file readahead request. 459 * The fadvise could update the bdi's default ra_pages. 460 */ 461 unsigned int file_ra_pages; 462 463 /* Set it if fadvise disables file readahead entirely */ 464 bool file_ra_disabled; 465 }; 466 467 static inline struct ceph_inode_info * 468 ceph_inode(const struct inode *inode) 469 { 470 return container_of(inode, struct ceph_inode_info, netfs.inode); 471 } 472 473 static inline struct ceph_fs_client * 474 ceph_inode_to_client(const struct inode *inode) 475 { 476 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 477 } 478 479 static inline struct ceph_fs_client * 480 ceph_sb_to_client(const struct super_block *sb) 481 { 482 return (struct ceph_fs_client *)sb->s_fs_info; 483 } 484 485 static inline struct ceph_mds_client * 486 ceph_sb_to_mdsc(const struct super_block *sb) 487 { 488 return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc; 489 } 490 491 static inline struct ceph_vino 492 ceph_vino(const struct inode *inode) 493 { 494 return ceph_inode(inode)->i_vino; 495 } 496 497 static inline u32 ceph_ino_to_ino32(u64 vino) 498 { 499 u32 ino = vino & 0xffffffff; 500 ino ^= vino >> 32; 501 if (!ino) 502 ino = 2; 503 return ino; 504 } 505 506 /* 507 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 508 * some arches. We generally do not use this value inside the ceph driver, but 509 * we do want to set it to something, so that generic vfs code has an 510 * appropriate value for tracepoints and the like. 511 */ 512 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 513 { 514 if (sizeof(ino_t) == sizeof(u32)) 515 return ceph_ino_to_ino32(vino.ino); 516 return (ino_t)vino.ino; 517 } 518 519 /* for printf-style formatting */ 520 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 521 522 static inline u64 ceph_ino(struct inode *inode) 523 { 524 return ceph_inode(inode)->i_vino.ino; 525 } 526 527 static inline u64 ceph_snap(struct inode *inode) 528 { 529 return ceph_inode(inode)->i_vino.snap; 530 } 531 532 /** 533 * ceph_present_ino - format an inode number for presentation to userland 534 * @sb: superblock where the inode lives 535 * @ino: inode number to (possibly) convert 536 * 537 * If the user mounted with the ino32 option, then the 64-bit value needs 538 * to be converted to something that can fit inside 32 bits. Note that 539 * internal kernel code never uses this value, so this is entirely for 540 * userland consumption. 541 */ 542 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 543 { 544 if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))) 545 return ceph_ino_to_ino32(ino); 546 return ino; 547 } 548 549 static inline u64 ceph_present_inode(struct inode *inode) 550 { 551 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 552 } 553 554 static inline int ceph_ino_compare(struct inode *inode, void *data) 555 { 556 struct ceph_vino *pvino = (struct ceph_vino *)data; 557 struct ceph_inode_info *ci = ceph_inode(inode); 558 return ci->i_vino.ino == pvino->ino && 559 ci->i_vino.snap == pvino->snap; 560 } 561 562 /* 563 * The MDS reserves a set of inodes for its own usage. These should never 564 * be accessible by clients, and so the MDS has no reason to ever hand these 565 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE. 566 * 567 * These come from src/mds/mdstypes.h in the ceph sources. 568 */ 569 #define CEPH_MAX_MDS 0x100 570 #define CEPH_NUM_STRAY 10 571 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS) 572 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS) 573 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY)) 574 575 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino) 576 { 577 if (vino.ino >= CEPH_INO_SYSTEM_BASE || 578 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET) 579 return false; 580 581 /* Don't warn on mdsdirs */ 582 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET, 583 "Attempt to access reserved inode number 0x%llx", 584 vino.ino); 585 return true; 586 } 587 588 static inline struct inode *ceph_find_inode(struct super_block *sb, 589 struct ceph_vino vino) 590 { 591 if (ceph_vino_is_reserved(vino)) 592 return NULL; 593 594 /* 595 * NB: The hashval will be run through the fs/inode.c hash function 596 * anyway, so there is no need to squash the inode number down to 597 * 32-bits first. Just use low-order bits on arches with 32-bit long. 598 */ 599 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 600 } 601 602 603 /* 604 * Ceph inode. 605 */ 606 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ 607 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ 608 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ 609 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ 610 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ 611 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ 612 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ 613 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ 614 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ 615 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ 616 #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */ 617 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 618 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) 619 #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */ 620 #define CEPH_I_ASYNC_CHECK_CAPS (1 << 14) /* check caps immediately after async 621 creating finishes */ 622 623 /* 624 * Masks of ceph inode work. 625 */ 626 #define CEPH_I_WORK_WRITEBACK 0 627 #define CEPH_I_WORK_INVALIDATE_PAGES 1 628 #define CEPH_I_WORK_VMTRUNCATE 2 629 #define CEPH_I_WORK_CHECK_CAPS 3 630 #define CEPH_I_WORK_FLUSH_SNAPS 4 631 632 /* 633 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 634 * and then clear it when they start succeeding. Note that we do a lockless 635 * check first, and only take the lock if it looks like it needs to be changed. 636 * The write submission code just takes this as a hint, so we're not too 637 * worried if a few slip through in either direction. 638 */ 639 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 640 { 641 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 642 spin_lock(&ci->i_ceph_lock); 643 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 644 spin_unlock(&ci->i_ceph_lock); 645 } 646 } 647 648 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 649 { 650 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 651 spin_lock(&ci->i_ceph_lock); 652 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 653 spin_unlock(&ci->i_ceph_lock); 654 } 655 } 656 657 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 658 long long release_count, 659 long long ordered_count) 660 { 661 /* 662 * Makes sure operations that setup readdir cache (update page 663 * cache and i_size) are strongly ordered w.r.t. the following 664 * atomic64_set() operations. 665 */ 666 smp_mb(); 667 atomic64_set(&ci->i_complete_seq[0], release_count); 668 atomic64_set(&ci->i_complete_seq[1], ordered_count); 669 } 670 671 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 672 { 673 atomic64_inc(&ci->i_release_count); 674 } 675 676 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 677 { 678 atomic64_inc(&ci->i_ordered_count); 679 } 680 681 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 682 { 683 return atomic64_read(&ci->i_complete_seq[0]) == 684 atomic64_read(&ci->i_release_count); 685 } 686 687 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 688 { 689 return atomic64_read(&ci->i_complete_seq[0]) == 690 atomic64_read(&ci->i_release_count) && 691 atomic64_read(&ci->i_complete_seq[1]) == 692 atomic64_read(&ci->i_ordered_count); 693 } 694 695 static inline void ceph_dir_clear_complete(struct inode *inode) 696 { 697 __ceph_dir_clear_complete(ceph_inode(inode)); 698 } 699 700 static inline void ceph_dir_clear_ordered(struct inode *inode) 701 { 702 __ceph_dir_clear_ordered(ceph_inode(inode)); 703 } 704 705 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 706 { 707 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 708 smp_rmb(); 709 return ret; 710 } 711 712 /* find a specific frag @f */ 713 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 714 u32 f); 715 716 /* 717 * choose fragment for value @v. copy frag content to pfrag, if leaf 718 * exists 719 */ 720 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 721 struct ceph_inode_frag *pfrag, 722 int *found); 723 724 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 725 { 726 return (struct ceph_dentry_info *)dentry->d_fsdata; 727 } 728 729 /* 730 * caps helpers 731 */ 732 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 733 { 734 return !RB_EMPTY_ROOT(&ci->i_caps); 735 } 736 737 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 738 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 739 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 740 int t); 741 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 742 struct ceph_cap *cap); 743 744 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 745 { 746 int issued; 747 spin_lock(&ci->i_ceph_lock); 748 issued = __ceph_caps_issued(ci, NULL); 749 spin_unlock(&ci->i_ceph_lock); 750 return issued; 751 } 752 753 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 754 int mask, int touch) 755 { 756 int r; 757 spin_lock(&ci->i_ceph_lock); 758 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 759 spin_unlock(&ci->i_ceph_lock); 760 return r; 761 } 762 763 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 764 { 765 return ci->i_dirty_caps | ci->i_flushing_caps; 766 } 767 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 768 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 769 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 770 struct ceph_cap_flush **pcf); 771 772 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 773 struct ceph_cap *ocap, int mask); 774 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 775 extern int __ceph_caps_used(struct ceph_inode_info *ci); 776 777 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 778 { 779 return ci->i_nr_by_mode[0]; 780 } 781 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 782 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 783 784 /* what the mds thinks we want */ 785 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 786 787 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 788 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 789 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 790 struct ceph_mount_options *fsopt); 791 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 792 struct ceph_cap_reservation *ctx, int need); 793 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 794 struct ceph_cap_reservation *ctx); 795 extern void ceph_reservation_status(struct ceph_fs_client *client, 796 int *total, int *avail, int *used, 797 int *reserved, int *min); 798 extern void change_auth_cap_ses(struct ceph_inode_info *ci, 799 struct ceph_mds_session *session); 800 801 802 803 /* 804 * we keep buffered readdir results attached to file->private_data 805 */ 806 #define CEPH_F_SYNC 1 807 #define CEPH_F_ATEND 2 808 809 struct ceph_file_info { 810 short fmode; /* initialized on open */ 811 short flags; /* CEPH_F_* */ 812 813 spinlock_t rw_contexts_lock; 814 struct list_head rw_contexts; 815 816 u32 filp_gen; 817 }; 818 819 struct ceph_dir_file_info { 820 struct ceph_file_info file_info; 821 822 /* readdir: position within the dir */ 823 u32 frag; 824 struct ceph_mds_request *last_readdir; 825 826 /* readdir: position within a frag */ 827 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 828 char *last_name; /* last entry in previous chunk */ 829 long long dir_release_count; 830 long long dir_ordered_count; 831 int readdir_cache_idx; 832 833 /* used for -o dirstat read() on directory thing */ 834 char *dir_info; 835 int dir_info_len; 836 }; 837 838 struct ceph_rw_context { 839 struct list_head list; 840 struct task_struct *thread; 841 int caps; 842 }; 843 844 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 845 struct ceph_rw_context _name = { \ 846 .thread = current, \ 847 .caps = _caps, \ 848 } 849 850 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 851 struct ceph_rw_context *ctx) 852 { 853 spin_lock(&cf->rw_contexts_lock); 854 list_add(&ctx->list, &cf->rw_contexts); 855 spin_unlock(&cf->rw_contexts_lock); 856 } 857 858 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 859 struct ceph_rw_context *ctx) 860 { 861 spin_lock(&cf->rw_contexts_lock); 862 list_del(&ctx->list); 863 spin_unlock(&cf->rw_contexts_lock); 864 } 865 866 static inline struct ceph_rw_context* 867 ceph_find_rw_context(struct ceph_file_info *cf) 868 { 869 struct ceph_rw_context *ctx, *found = NULL; 870 spin_lock(&cf->rw_contexts_lock); 871 list_for_each_entry(ctx, &cf->rw_contexts, list) { 872 if (ctx->thread == current) { 873 found = ctx; 874 break; 875 } 876 } 877 spin_unlock(&cf->rw_contexts_lock); 878 return found; 879 } 880 881 struct ceph_readdir_cache_control { 882 struct page *page; 883 struct dentry **dentries; 884 int index; 885 }; 886 887 /* 888 * A "snap realm" describes a subset of the file hierarchy sharing 889 * the same set of snapshots that apply to it. The realms themselves 890 * are organized into a hierarchy, such that children inherit (some of) 891 * the snapshots of their parents. 892 * 893 * All inodes within the realm that have capabilities are linked into a 894 * per-realm list. 895 */ 896 struct ceph_snap_realm { 897 u64 ino; 898 struct inode *inode; 899 atomic_t nref; 900 struct rb_node node; 901 902 u64 created, seq; 903 u64 parent_ino; 904 u64 parent_since; /* snapid when our current parent became so */ 905 906 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 907 u32 num_prior_parent_snaps; /* had prior to parent_since */ 908 u64 *snaps; /* snaps specific to this realm */ 909 u32 num_snaps; 910 911 struct ceph_snap_realm *parent; 912 struct list_head children; /* list of child realms */ 913 struct list_head child_item; 914 915 struct list_head empty_item; /* if i have ref==0 */ 916 917 struct list_head dirty_item; /* if realm needs new context */ 918 919 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */ 920 921 /* the current set of snaps for this realm */ 922 struct ceph_snap_context *cached_context; 923 924 struct list_head inodes_with_caps; 925 spinlock_t inodes_with_caps_lock; 926 }; 927 928 static inline int default_congestion_kb(void) 929 { 930 int congestion_kb; 931 932 /* 933 * Copied from NFS 934 * 935 * congestion size, scale with available memory. 936 * 937 * 64MB: 8192k 938 * 128MB: 11585k 939 * 256MB: 16384k 940 * 512MB: 23170k 941 * 1GB: 32768k 942 * 2GB: 46340k 943 * 4GB: 65536k 944 * 8GB: 92681k 945 * 16GB: 131072k 946 * 947 * This allows larger machines to have larger/more transfers. 948 * Limit the default to 256M 949 */ 950 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 951 if (congestion_kb > 256*1024) 952 congestion_kb = 256*1024; 953 954 return congestion_kb; 955 } 956 957 958 /* super.c */ 959 extern int ceph_force_reconnect(struct super_block *sb); 960 /* snap.c */ 961 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 962 u64 ino); 963 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 964 struct ceph_snap_realm *realm); 965 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 966 struct ceph_snap_realm *realm); 967 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 968 void *p, void *e, bool deletion, 969 struct ceph_snap_realm **realm_ret); 970 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm); 971 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 972 struct ceph_mds_session *session, 973 struct ceph_msg *msg); 974 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 975 struct ceph_cap_snap *capsnap); 976 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc); 977 978 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 979 u64 snap); 980 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 981 struct ceph_snapid_map *sm); 982 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 983 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 984 void ceph_umount_begin(struct super_block *sb); 985 986 987 /* 988 * a cap_snap is "pending" if it is still awaiting an in-progress 989 * sync write (that may/may not still update size, mtime, etc.). 990 */ 991 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 992 { 993 return !list_empty(&ci->i_cap_snaps) && 994 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 995 ci_item)->writing; 996 } 997 998 /* inode.c */ 999 struct ceph_mds_reply_info_in; 1000 struct ceph_mds_reply_dirfrag; 1001 1002 extern const struct inode_operations ceph_file_iops; 1003 1004 extern struct inode *ceph_alloc_inode(struct super_block *sb); 1005 extern void ceph_evict_inode(struct inode *inode); 1006 extern void ceph_free_inode(struct inode *inode); 1007 1008 extern struct inode *ceph_get_inode(struct super_block *sb, 1009 struct ceph_vino vino); 1010 extern struct inode *ceph_get_snapdir(struct inode *parent); 1011 extern int ceph_fill_file_size(struct inode *inode, int issued, 1012 u32 truncate_seq, u64 truncate_size, u64 size); 1013 extern void ceph_fill_file_time(struct inode *inode, int issued, 1014 u64 time_warp_seq, struct timespec64 *ctime, 1015 struct timespec64 *mtime, 1016 struct timespec64 *atime); 1017 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 1018 struct ceph_mds_reply_info_in *iinfo, 1019 struct ceph_mds_reply_dirfrag *dirinfo, 1020 struct ceph_mds_session *session, int cap_fmode, 1021 struct ceph_cap_reservation *caps_reservation); 1022 extern int ceph_fill_trace(struct super_block *sb, 1023 struct ceph_mds_request *req); 1024 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1025 struct ceph_mds_session *session); 1026 1027 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 1028 1029 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 1030 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 1031 1032 void ceph_queue_inode_work(struct inode *inode, int work_bit); 1033 1034 static inline void ceph_queue_vmtruncate(struct inode *inode) 1035 { 1036 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); 1037 } 1038 1039 static inline void ceph_queue_invalidate(struct inode *inode) 1040 { 1041 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); 1042 } 1043 1044 static inline void ceph_queue_writeback(struct inode *inode) 1045 { 1046 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); 1047 } 1048 1049 static inline void ceph_queue_check_caps(struct inode *inode) 1050 { 1051 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); 1052 } 1053 1054 static inline void ceph_queue_flush_snaps(struct inode *inode) 1055 { 1056 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); 1057 } 1058 1059 extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask); 1060 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 1061 int mask, bool force); 1062 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 1063 { 1064 return __ceph_do_getattr(inode, NULL, mask, force); 1065 } 1066 extern int ceph_permission(struct mnt_idmap *idmap, 1067 struct inode *inode, int mask); 1068 extern int __ceph_setattr(struct inode *inode, struct iattr *attr); 1069 extern int ceph_setattr(struct mnt_idmap *idmap, 1070 struct dentry *dentry, struct iattr *attr); 1071 extern int ceph_getattr(struct mnt_idmap *idmap, 1072 const struct path *path, struct kstat *stat, 1073 u32 request_mask, unsigned int flags); 1074 void ceph_inode_shutdown(struct inode *inode); 1075 1076 static inline bool ceph_inode_is_shutdown(struct inode *inode) 1077 { 1078 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags); 1079 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 1080 int state = READ_ONCE(fsc->mount_state); 1081 1082 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN; 1083 } 1084 1085 /* xattr.c */ 1086 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 1087 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size); 1088 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 1089 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 1090 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 1091 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 1092 extern const struct xattr_handler *ceph_xattr_handlers[]; 1093 1094 struct ceph_acl_sec_ctx { 1095 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1096 void *default_acl; 1097 void *acl; 1098 #endif 1099 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1100 void *sec_ctx; 1101 u32 sec_ctxlen; 1102 #endif 1103 struct ceph_pagelist *pagelist; 1104 }; 1105 1106 #ifdef CONFIG_SECURITY 1107 extern bool ceph_security_xattr_deadlock(struct inode *in); 1108 extern bool ceph_security_xattr_wanted(struct inode *in); 1109 #else 1110 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1111 { 1112 return false; 1113 } 1114 static inline bool ceph_security_xattr_wanted(struct inode *in) 1115 { 1116 return false; 1117 } 1118 #endif 1119 1120 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1121 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1122 struct ceph_acl_sec_ctx *ctx); 1123 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1124 { 1125 security_inode_invalidate_secctx(inode); 1126 } 1127 #else 1128 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1129 struct ceph_acl_sec_ctx *ctx) 1130 { 1131 return 0; 1132 } 1133 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1134 { 1135 } 1136 #endif 1137 1138 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1139 1140 /* acl.c */ 1141 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1142 1143 struct posix_acl *ceph_get_acl(struct inode *, int, bool); 1144 int ceph_set_acl(struct mnt_idmap *idmap, 1145 struct dentry *dentry, struct posix_acl *acl, int type); 1146 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1147 struct ceph_acl_sec_ctx *as_ctx); 1148 void ceph_init_inode_acls(struct inode *inode, 1149 struct ceph_acl_sec_ctx *as_ctx); 1150 1151 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1152 { 1153 forget_all_cached_acls(inode); 1154 } 1155 1156 #else 1157 1158 #define ceph_get_acl NULL 1159 #define ceph_set_acl NULL 1160 1161 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1162 struct ceph_acl_sec_ctx *as_ctx) 1163 { 1164 return 0; 1165 } 1166 static inline void ceph_init_inode_acls(struct inode *inode, 1167 struct ceph_acl_sec_ctx *as_ctx) 1168 { 1169 } 1170 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 1171 { 1172 return 0; 1173 } 1174 1175 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1176 { 1177 } 1178 1179 #endif 1180 1181 /* caps.c */ 1182 extern const char *ceph_cap_string(int c); 1183 extern void ceph_handle_caps(struct ceph_mds_session *session, 1184 struct ceph_msg *msg); 1185 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1186 struct ceph_cap_reservation *ctx); 1187 extern void ceph_add_cap(struct inode *inode, 1188 struct ceph_mds_session *session, u64 cap_id, 1189 unsigned issued, unsigned wanted, 1190 unsigned cap, unsigned seq, u64 realmino, int flags, 1191 struct ceph_cap **new_cap); 1192 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1193 extern void ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1194 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1195 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1196 struct ceph_cap *cap); 1197 extern int ceph_is_any_caps(struct inode *inode); 1198 1199 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1200 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1201 int datasync); 1202 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1203 struct ceph_mds_session *session); 1204 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1205 struct ceph_mds_session *session); 1206 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1207 struct ceph_inode_info *ci); 1208 extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, 1209 int mds); 1210 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1211 int mds); 1212 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1213 bool snap_rwsem_locked); 1214 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1215 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1216 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); 1217 extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, 1218 int had); 1219 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1220 struct ceph_snap_context *snapc); 1221 extern void __ceph_remove_capsnap(struct inode *inode, 1222 struct ceph_cap_snap *capsnap, 1223 bool *wake_ci, bool *wake_mdsc); 1224 extern void ceph_remove_capsnap(struct inode *inode, 1225 struct ceph_cap_snap *capsnap, 1226 bool *wake_ci, bool *wake_mdsc); 1227 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1228 struct ceph_mds_session **psession); 1229 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1230 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags); 1231 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1232 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1233 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1234 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1235 int mds, int drop, int unless, int force); 1236 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1237 struct inode *dir, 1238 int mds, int drop, int unless); 1239 1240 extern int ceph_get_caps(struct file *filp, int need, int want, 1241 loff_t endoff, int *got); 1242 extern int ceph_try_get_caps(struct inode *inode, 1243 int need, int want, bool nonblock, int *got); 1244 1245 /* for counting open files by mode */ 1246 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1247 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1248 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1249 struct ceph_mds_client *mdsc, int fmode); 1250 1251 /* addr.c */ 1252 extern const struct address_space_operations ceph_aops; 1253 extern const struct netfs_request_ops ceph_netfs_ops; 1254 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 1255 extern int ceph_uninline_data(struct file *file); 1256 extern int ceph_pool_perm_check(struct inode *inode, int need); 1257 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1258 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); 1259 1260 static inline bool ceph_has_inline_data(struct ceph_inode_info *ci) 1261 { 1262 if (ci->i_inline_version == CEPH_INLINE_NONE || 1263 ci->i_inline_version == 1) /* initial version, no data */ 1264 return false; 1265 return true; 1266 } 1267 1268 /* file.c */ 1269 extern const struct file_operations ceph_file_fops; 1270 1271 extern int ceph_renew_caps(struct inode *inode, int fmode); 1272 extern int ceph_open(struct inode *inode, struct file *file); 1273 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1274 struct file *file, unsigned flags, umode_t mode); 1275 extern int ceph_release(struct inode *inode, struct file *filp); 1276 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1277 char *data, size_t len); 1278 1279 /* dir.c */ 1280 extern const struct file_operations ceph_dir_fops; 1281 extern const struct file_operations ceph_snapdir_fops; 1282 extern const struct inode_operations ceph_dir_iops; 1283 extern const struct inode_operations ceph_snapdir_iops; 1284 extern const struct dentry_operations ceph_dentry_ops; 1285 1286 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1287 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1288 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req, 1289 struct dentry *dentry); 1290 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1291 struct dentry *dentry, int err); 1292 1293 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1294 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1295 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1296 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1297 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1298 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1299 1300 /* ioctl.c */ 1301 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1302 1303 /* export.c */ 1304 extern const struct export_operations ceph_export_ops; 1305 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1306 1307 /* locks.c */ 1308 extern __init void ceph_flock_init(void); 1309 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1310 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1311 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1312 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1313 struct ceph_filelock *flocks, 1314 int num_fcntl_locks, 1315 int num_flock_locks); 1316 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1317 struct ceph_pagelist *pagelist, 1318 int num_fcntl_locks, int num_flock_locks); 1319 1320 /* debugfs.c */ 1321 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1322 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1323 1324 /* quota.c */ 1325 1326 enum quota_get_realm { 1327 QUOTA_GET_MAX_FILES, 1328 QUOTA_GET_MAX_BYTES, 1329 QUOTA_GET_ANY 1330 }; 1331 1332 static inline bool __ceph_has_quota(struct ceph_inode_info *ci, 1333 enum quota_get_realm which) 1334 { 1335 bool has_quota = false; 1336 1337 switch (which) { 1338 case QUOTA_GET_MAX_BYTES: 1339 has_quota = !!ci->i_max_bytes; 1340 break; 1341 case QUOTA_GET_MAX_FILES: 1342 has_quota = !!ci->i_max_files; 1343 break; 1344 default: 1345 has_quota = !!(ci->i_max_files || ci->i_max_bytes); 1346 } 1347 return has_quota; 1348 } 1349 1350 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1351 1352 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1353 u64 max_bytes, u64 max_files) 1354 { 1355 bool had_quota, has_quota; 1356 had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1357 ci->i_max_bytes = max_bytes; 1358 ci->i_max_files = max_files; 1359 has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1360 1361 if (had_quota != has_quota) 1362 ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota); 1363 } 1364 1365 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1366 struct ceph_mds_session *session, 1367 struct ceph_msg *msg); 1368 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1369 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1370 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1371 loff_t newlen); 1372 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1373 loff_t newlen); 1374 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1375 struct kstatfs *buf); 1376 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1377 1378 #endif /* _FS_CEPH_SUPER_H */ 1379