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 #include <linux/ceph/osd_client.h> 7 8 #include <linux/unaligned.h> 9 #include <linux/backing-dev.h> 10 #include <linux/completion.h> 11 #include <linux/exportfs.h> 12 #include <linux/fs.h> 13 #include <linux/mempool.h> 14 #include <linux/pagemap.h> 15 #include <linux/wait.h> 16 #include <linux/writeback.h> 17 #include <linux/slab.h> 18 #include <linux/posix_acl.h> 19 #include <linux/refcount.h> 20 #include <linux/security.h> 21 #include <linux/netfs.h> 22 #include <linux/fscache.h> 23 #include <linux/hashtable.h> 24 25 #include <linux/ceph/libceph.h> 26 #include "crypto.h" 27 28 /* large granularity for statfs utilization stats to facilitate 29 * large volume sizes on 32-bit machines. */ 30 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ 31 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 32 #define CEPH_4K_BLOCK_SHIFT 12 /* 4 KB */ 33 34 #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */ 35 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 36 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 37 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 38 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 39 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ 40 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ 41 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */ 42 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */ 43 #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ 44 #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */ 45 #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ 46 #define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache altogether */ 47 #define CEPH_MOUNT_OPT_SPARSEREAD (1<<17) /* always do sparse reads */ 48 49 #define CEPH_MOUNT_OPT_DEFAULT \ 50 (CEPH_MOUNT_OPT_DCACHE | \ 51 CEPH_MOUNT_OPT_NOCOPYFROM | \ 52 CEPH_MOUNT_OPT_ASYNC_DIROPS) 53 54 #define ceph_set_mount_opt(fsc, opt) \ 55 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt 56 #define ceph_clear_mount_opt(fsc, opt) \ 57 (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt 58 #define ceph_test_mount_opt(fsc, opt) \ 59 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 60 61 /* max size of osd read request, limited by libceph */ 62 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN 63 /* osd has a configurable limitation of max write size. 64 * CEPH_MSG_MAX_DATA_LEN should be small enough. */ 65 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN 66 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ 67 #define CEPH_MAX_READDIR_DEFAULT 1024 68 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 69 #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 70 71 /* 72 * Delay telling the MDS we no longer want caps, in case we reopen 73 * the file. Delay a minimum amount of time, even if we send a cap 74 * message for some other reason. Otherwise, take the oppotunity to 75 * update the mds to avoid sending another message later. 76 */ 77 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ 78 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ 79 80 struct ceph_mount_options { 81 unsigned int flags; 82 83 unsigned int wsize; /* max write size */ 84 unsigned int rsize; /* max read size */ 85 unsigned int rasize; /* max readahead */ 86 unsigned int congestion_kb; /* max writeback in flight */ 87 unsigned int caps_wanted_delay_min, caps_wanted_delay_max; 88 int caps_max; 89 unsigned int max_readdir; /* max readdir result (entries) */ 90 unsigned int max_readdir_bytes; /* max readdir result (bytes) */ 91 92 bool new_dev_syntax; 93 94 /* 95 * everything above this point can be memcmp'd; everything below 96 * is handled in compare_mount_options() 97 */ 98 99 char *snapdir_name; /* default ".snap" */ 100 char *mds_namespace; /* default NULL */ 101 char *server_path; /* default NULL (means "/") */ 102 char *fscache_uniq; /* default NULL */ 103 char *mon_addr; 104 struct fscrypt_dummy_policy dummy_enc_policy; 105 }; 106 107 #define CEPH_NAMESPACE_WILDCARD "*" 108 109 static inline bool ceph_namespace_match(const char *pattern, 110 const char *target) 111 { 112 if (!pattern || !pattern[0] || 113 !strcmp(pattern, CEPH_NAMESPACE_WILDCARD)) 114 return true; 115 116 return !strcmp(pattern, target); 117 } 118 119 /* 120 * Check if the mds namespace in ceph_mount_options matches 121 * the passed in namespace string. First time match (when 122 * ->mds_namespace is NULL) is treated specially, since 123 * ->mds_namespace needs to be initialized by the caller. 124 */ 125 static inline bool namespace_equals(struct ceph_mount_options *fsopt, 126 const char *namespace, size_t len) 127 { 128 return !(fsopt->mds_namespace && 129 (strlen(fsopt->mds_namespace) != len || 130 strncmp(fsopt->mds_namespace, namespace, len))); 131 } 132 133 /* mount state */ 134 enum { 135 CEPH_MOUNT_MOUNTING, 136 CEPH_MOUNT_MOUNTED, 137 CEPH_MOUNT_UNMOUNTING, 138 CEPH_MOUNT_UNMOUNTED, 139 CEPH_MOUNT_SHUTDOWN, 140 CEPH_MOUNT_RECOVER, 141 CEPH_MOUNT_FENCE_IO, 142 }; 143 144 #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8 145 146 struct ceph_fs_client { 147 struct super_block *sb; 148 149 struct list_head metric_wakeup; 150 151 struct ceph_mount_options *mount_options; 152 struct ceph_client *client; 153 154 int mount_state; 155 156 bool blocklisted; 157 158 bool have_copy_from2; 159 160 u32 filp_gen; 161 loff_t max_file_size; 162 163 struct ceph_mds_client *mdsc; 164 165 atomic_long_t writeback_count; 166 bool write_congested; 167 168 struct workqueue_struct *inode_wq; 169 struct workqueue_struct *cap_wq; 170 171 DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS); 172 spinlock_t async_unlink_conflict_lock; 173 174 #ifdef CONFIG_DEBUG_FS 175 struct dentry *debugfs_dentry_lru, *debugfs_caps; 176 struct dentry *debugfs_congestion_kb; 177 struct dentry *debugfs_bdi; 178 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 179 struct dentry *debugfs_status; 180 struct dentry *debugfs_mds_sessions; 181 struct dentry *debugfs_metrics_dir; 182 struct dentry *debugfs_subvolume_metrics; 183 #endif 184 185 #ifdef CONFIG_CEPH_FSCACHE 186 struct fscache_volume *fscache; 187 #endif 188 #ifdef CONFIG_FS_ENCRYPTION 189 struct fscrypt_dummy_policy fsc_dummy_enc_policy; 190 #endif 191 }; 192 193 /* 194 * File i/o capability. This tracks shared state with the metadata 195 * server that allows us to cache or writeback attributes or to read 196 * and write data. For any given inode, we should have one or more 197 * capabilities, one issued by each metadata server, and our 198 * cumulative access is the OR of all issued capabilities. 199 * 200 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 201 * session capability lists. 202 */ 203 struct ceph_cap { 204 struct ceph_inode_info *ci; 205 struct rb_node ci_node; /* per-ci cap tree */ 206 struct ceph_mds_session *session; 207 struct list_head session_caps; /* per-session caplist */ 208 u64 cap_id; /* unique cap id (mds provided) */ 209 union { 210 /* in-use caps */ 211 struct { 212 int issued; /* latest, from the mds */ 213 int implemented; /* implemented superset of 214 issued (for revocation) */ 215 int mds; /* mds index for this cap */ 216 int mds_wanted; /* caps wanted from this mds */ 217 }; 218 /* caps to release */ 219 struct { 220 u64 cap_ino; 221 int queue_release; 222 }; 223 }; 224 u32 seq, issue_seq, mseq; 225 u32 cap_gen; /* active/stale cycle */ 226 unsigned long last_used; 227 struct list_head caps_item; 228 }; 229 230 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 231 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 232 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 233 #define CHECK_CAPS_FLUSH_FORCE 8 /* force flush any caps */ 234 235 struct ceph_cap_flush { 236 u64 tid; 237 int caps; 238 bool wake; /* wake up flush waiters when finish ? */ 239 bool is_capsnap; /* true means capsnap */ 240 struct list_head g_list; // global 241 struct list_head i_list; // per inode 242 }; 243 244 /* 245 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 246 * we first complete any in-process sync writes and writeback any dirty 247 * data before flushing the snapped state (tracked here) back to the MDS. 248 */ 249 struct ceph_cap_snap { 250 refcount_t nref; 251 struct list_head ci_item; 252 253 struct ceph_cap_flush cap_flush; 254 255 u64 follows; 256 int issued, dirty; 257 struct ceph_snap_context *context; 258 259 umode_t mode; 260 kuid_t uid; 261 kgid_t gid; 262 263 struct ceph_buffer *xattr_blob; 264 u64 xattr_version; 265 266 u64 size; 267 u64 change_attr; 268 struct timespec64 mtime, atime, ctime, btime; 269 u64 time_warp_seq; 270 u64 truncate_size; 271 u32 truncate_seq; 272 int writing; /* a sync write is still in progress */ 273 int dirty_pages; /* dirty pages awaiting writeback */ 274 bool inline_data; 275 bool need_flush; 276 }; 277 278 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 279 { 280 if (refcount_dec_and_test(&capsnap->nref)) { 281 if (capsnap->xattr_blob) 282 ceph_buffer_put(capsnap->xattr_blob); 283 kmem_cache_free(ceph_cap_snap_cachep, capsnap); 284 } 285 } 286 287 /* 288 * The frag tree describes how a directory is fragmented, potentially across 289 * multiple metadata servers. It is also used to indicate points where 290 * metadata authority is delegated, and whether/where metadata is replicated. 291 * 292 * A _leaf_ frag will be present in the i_fragtree IFF there is 293 * delegation info. That is, if mds >= 0 || ndist > 0. 294 */ 295 #define CEPH_MAX_DIRFRAG_REP 4 296 297 struct ceph_inode_frag { 298 struct rb_node node; 299 300 /* fragtree state */ 301 u32 frag; 302 int split_by; /* i.e. 2^(split_by) children */ 303 304 /* delegation and replication info */ 305 int mds; /* -1 if same authority as parent */ 306 int ndist; /* >0 if replicated */ 307 int dist[CEPH_MAX_DIRFRAG_REP]; 308 }; 309 310 /* 311 * We cache inode xattrs as an encoded blob until they are first used, 312 * at which point we parse them into an rbtree. 313 */ 314 struct ceph_inode_xattr { 315 struct rb_node node; 316 317 const char *name; 318 int name_len; 319 const char *val; 320 int val_len; 321 int dirty; 322 323 int should_free_name; 324 int should_free_val; 325 }; 326 327 /* 328 * Ceph dentry state 329 */ 330 struct ceph_dentry_info { 331 struct dentry *dentry; 332 struct ceph_mds_session *lease_session; 333 struct list_head lease_list; 334 struct hlist_node hnode; 335 unsigned long flags; 336 int lease_shared_gen; 337 u32 lease_gen; 338 u32 lease_seq; 339 unsigned long lease_renew_after, lease_renew_from; 340 unsigned long time; 341 u64 offset; 342 }; 343 344 #define CEPH_DENTRY_REFERENCED (1 << 0) 345 #define CEPH_DENTRY_LEASE_LIST (1 << 1) 346 #define CEPH_DENTRY_SHRINK_LIST (1 << 2) 347 #define CEPH_DENTRY_PRIMARY_LINK (1 << 3) 348 #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4) 349 #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT) 350 #define CEPH_DENTRY_ASYNC_CREATE_BIT (5) 351 #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT) 352 353 struct ceph_inode_xattrs_info { 354 /* 355 * (still encoded) xattr blob. we avoid the overhead of parsing 356 * this until someone actually calls getxattr, etc. 357 * 358 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 359 * NULL means we don't know. 360 */ 361 struct ceph_buffer *blob, *prealloc_blob; 362 363 struct rb_root index; 364 bool dirty; 365 int count; 366 int names_size; 367 int vals_size; 368 u64 version, index_version; 369 }; 370 371 /* 372 * Ceph inode. 373 */ 374 struct ceph_inode_info { 375 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 376 struct ceph_vino i_vino; /* ceph ino + snap */ 377 378 spinlock_t i_ceph_lock; 379 380 u64 i_version; 381 u64 i_inline_version; 382 u32 i_time_warp_seq; 383 384 unsigned long i_ceph_flags; 385 atomic64_t i_release_count; 386 atomic64_t i_ordered_count; 387 atomic64_t i_complete_seq[2]; 388 389 struct ceph_dir_layout i_dir_layout; 390 struct ceph_file_layout i_layout; 391 struct ceph_file_layout i_cached_layout; // for async creates 392 char *i_symlink; 393 394 /* for dirs */ 395 struct timespec64 i_rctime; 396 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps; 397 u64 i_files, i_subdirs; 398 399 /* quotas */ 400 u64 i_max_bytes, i_max_files; 401 402 /* 403 * Subvolume ID this inode belongs to. CEPH_SUBVOLUME_ID_NONE (0) 404 * means unknown/unset, matching the FUSE client convention. 405 * Once set to a valid (non-zero) value, it should not change 406 * during the inode's lifetime. 407 */ 408 #define CEPH_SUBVOLUME_ID_NONE 0 409 u64 i_subvolume_id; 410 411 s32 i_dir_pin; 412 413 struct rb_root i_fragtree; 414 int i_fragtree_nsplits; 415 struct mutex i_fragtree_mutex; 416 417 struct ceph_inode_xattrs_info i_xattrs; 418 419 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 420 * s_mutex. */ 421 struct rb_root i_caps; /* cap list */ 422 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 423 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 424 425 /* 426 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 427 * is protected by the mdsc->cap_dirty_lock, but each individual item 428 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 429 * requires the mdsc->cap_dirty_lock. List presence for an item can 430 * be tested under the i_ceph_lock. Changing anything requires both. 431 */ 432 struct list_head i_dirty_item; 433 434 /* 435 * Link to session's s_cap_flushing list. Protected in a similar 436 * fashion to i_dirty_item, but also by the s_mutex for changes. The 437 * s_cap_flushing list can be walked while holding either the s_mutex 438 * or msdc->cap_dirty_lock. List presence can also be checked while 439 * holding the i_ceph_lock for this inode. 440 */ 441 struct list_head i_flushing_item; 442 443 /* we need to track cap writeback on a per-cap-bit basis, to allow 444 * overlapping, pipelined cap flushes to the mds. we can probably 445 * reduce the tid to 8 bits if we're concerned about inode size. */ 446 struct ceph_cap_flush *i_prealloc_cap_flush; 447 struct list_head i_cap_flush_list; 448 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 449 unsigned long i_hold_caps_max; /* jiffies */ 450 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 451 struct ceph_cap_reservation i_cap_migration_resv; 452 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 453 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 454 dirty|flushing caps */ 455 unsigned i_snap_caps; /* cap bits for snapped files */ 456 457 unsigned long i_last_rd; 458 unsigned long i_last_wr; 459 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 460 461 struct mutex i_truncate_mutex; 462 u32 i_truncate_seq; /* last truncate to smaller size */ 463 u64 i_truncate_size; /* and the size we last truncated down to */ 464 int i_truncate_pending; /* still need to call vmtruncate */ 465 /* 466 * For none fscrypt case it equals to i_truncate_size or it will 467 * equals to fscrypt_file_size 468 */ 469 u64 i_truncate_pagecache_size; 470 471 u64 i_max_size; /* max file size authorized by mds */ 472 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 473 u64 i_wanted_max_size; /* offset we'd like to write too */ 474 u64 i_requested_max_size; /* max_size we've requested */ 475 476 /* held references to caps */ 477 int i_pin_ref; 478 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 479 int i_wrbuffer_ref, i_wrbuffer_ref_head; 480 atomic_t i_filelock_ref; 481 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 482 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 483 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 484 485 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 486 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 487 spinlock_t i_unsafe_lock; 488 489 union { 490 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 491 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 492 }; 493 struct list_head i_snap_realm_item; 494 struct list_head i_snap_flush_item; 495 struct timespec64 i_btime; 496 struct timespec64 i_snap_btime; 497 498 struct work_struct i_work; 499 unsigned long i_work_mask; 500 501 #ifdef CONFIG_FS_ENCRYPTION 502 struct fscrypt_inode_info *i_crypt_info; 503 u32 fscrypt_auth_len; 504 u32 fscrypt_file_len; 505 u8 *fscrypt_auth; 506 u8 *fscrypt_file; 507 #endif 508 }; 509 510 struct ceph_netfs_request_data { 511 int caps; 512 513 /* 514 * Maximum size of a file readahead request. 515 * The fadvise could update the bdi's default ra_pages. 516 */ 517 unsigned int file_ra_pages; 518 519 /* Set it if fadvise disables file readahead entirely */ 520 bool file_ra_disabled; 521 }; 522 523 static inline struct ceph_inode_info * 524 ceph_inode(const struct inode *inode) 525 { 526 return container_of(inode, struct ceph_inode_info, netfs.inode); 527 } 528 529 static inline struct ceph_fs_client * 530 ceph_inode_to_fs_client(const struct inode *inode) 531 { 532 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 533 } 534 535 static inline struct ceph_fs_client * 536 ceph_sb_to_fs_client(const struct super_block *sb) 537 { 538 return (struct ceph_fs_client *)sb->s_fs_info; 539 } 540 541 static inline struct ceph_mds_client * 542 ceph_sb_to_mdsc(const struct super_block *sb) 543 { 544 return (struct ceph_mds_client *)ceph_sb_to_fs_client(sb)->mdsc; 545 } 546 547 static inline struct ceph_client * 548 ceph_inode_to_client(const struct inode *inode) 549 { 550 return (struct ceph_client *)ceph_inode_to_fs_client(inode)->client; 551 } 552 553 static inline struct ceph_vino 554 ceph_vino(const struct inode *inode) 555 { 556 return ceph_inode(inode)->i_vino; 557 } 558 559 static inline u32 ceph_ino_to_ino32(u64 vino) 560 { 561 u32 ino = vino & 0xffffffff; 562 ino ^= vino >> 32; 563 if (!ino) 564 ino = 2; 565 return ino; 566 } 567 568 /* 569 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 570 * some arches. We generally do not use this value inside the ceph driver, but 571 * we do want to set it to something, so that generic vfs code has an 572 * appropriate value for tracepoints and the like. 573 */ 574 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 575 { 576 if (sizeof(ino_t) == sizeof(u32)) 577 return ceph_ino_to_ino32(vino.ino); 578 return (ino_t)vino.ino; 579 } 580 581 /* for printf-style formatting */ 582 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 583 584 static inline u64 ceph_ino(struct inode *inode) 585 { 586 return ceph_inode(inode)->i_vino.ino; 587 } 588 589 static inline u64 ceph_snap(struct inode *inode) 590 { 591 return ceph_inode(inode)->i_vino.snap; 592 } 593 594 /** 595 * ceph_present_ino - format an inode number for presentation to userland 596 * @sb: superblock where the inode lives 597 * @ino: inode number to (possibly) convert 598 * 599 * If the user mounted with the ino32 option, then the 64-bit value needs 600 * to be converted to something that can fit inside 32 bits. Note that 601 * internal kernel code never uses this value, so this is entirely for 602 * userland consumption. 603 */ 604 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 605 { 606 if (unlikely(ceph_test_mount_opt(ceph_sb_to_fs_client(sb), INO32))) 607 return ceph_ino_to_ino32(ino); 608 return ino; 609 } 610 611 static inline u64 ceph_present_inode(struct inode *inode) 612 { 613 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 614 } 615 616 static inline int ceph_ino_compare(struct inode *inode, void *data) 617 { 618 struct ceph_vino *pvino = (struct ceph_vino *)data; 619 struct ceph_inode_info *ci = ceph_inode(inode); 620 return ci->i_vino.ino == pvino->ino && 621 ci->i_vino.snap == pvino->snap; 622 } 623 624 /* 625 * The MDS reserves a set of inodes for its own usage. These should never 626 * be accessible by clients, and so the MDS has no reason to ever hand these 627 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE. 628 * 629 * These come from src/mds/mdstypes.h in the ceph sources. 630 */ 631 #define CEPH_MAX_MDS 0x100 632 #define CEPH_NUM_STRAY 10 633 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS) 634 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS) 635 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY)) 636 637 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino) 638 { 639 if (vino.ino >= CEPH_INO_SYSTEM_BASE || 640 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET) 641 return false; 642 643 /* Don't warn on mdsdirs */ 644 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET, 645 "Attempt to access reserved inode number 0x%llx", 646 vino.ino); 647 return true; 648 } 649 650 static inline struct inode *ceph_find_inode(struct super_block *sb, 651 struct ceph_vino vino) 652 { 653 if (ceph_vino_is_reserved(vino)) 654 return NULL; 655 656 /* 657 * NB: The hashval will be run through the fs/inode.c hash function 658 * anyway, so there is no need to squash the inode number down to 659 * 32-bits first. Just use low-order bits on arches with 32-bit long. 660 */ 661 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 662 } 663 664 665 /* 666 * Ceph inode. 667 */ 668 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ 669 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ 670 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ 671 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ 672 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ 673 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ 674 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ 675 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ 676 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ 677 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ 678 #define CEPH_I_ODIRECT_BIT (11) /* inode in direct I/O mode */ 679 #define CEPH_I_ODIRECT (1 << CEPH_I_ODIRECT_BIT) 680 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 681 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) 682 #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */ 683 #define CEPH_I_ASYNC_CHECK_CAPS (1 << 14) /* check caps immediately after async 684 creating finishes */ 685 686 /* 687 * Masks of ceph inode work. 688 */ 689 #define CEPH_I_WORK_WRITEBACK 0 690 #define CEPH_I_WORK_INVALIDATE_PAGES 1 691 #define CEPH_I_WORK_VMTRUNCATE 2 692 #define CEPH_I_WORK_CHECK_CAPS 3 693 #define CEPH_I_WORK_FLUSH_SNAPS 4 694 695 /* 696 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 697 * and then clear it when they start succeeding. Note that we do a lockless 698 * check first, and only take the lock if it looks like it needs to be changed. 699 * The write submission code just takes this as a hint, so we're not too 700 * worried if a few slip through in either direction. 701 */ 702 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 703 { 704 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { 705 spin_lock(&ci->i_ceph_lock); 706 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; 707 spin_unlock(&ci->i_ceph_lock); 708 } 709 } 710 711 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 712 { 713 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { 714 spin_lock(&ci->i_ceph_lock); 715 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; 716 spin_unlock(&ci->i_ceph_lock); 717 } 718 } 719 720 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 721 long long release_count, 722 long long ordered_count) 723 { 724 /* 725 * Makes sure operations that setup readdir cache (update page 726 * cache and i_size) are strongly ordered w.r.t. the following 727 * atomic64_set() operations. 728 */ 729 smp_mb(); 730 atomic64_set(&ci->i_complete_seq[0], release_count); 731 atomic64_set(&ci->i_complete_seq[1], ordered_count); 732 } 733 734 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 735 { 736 atomic64_inc(&ci->i_release_count); 737 } 738 739 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 740 { 741 atomic64_inc(&ci->i_ordered_count); 742 } 743 744 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 745 { 746 return atomic64_read(&ci->i_complete_seq[0]) == 747 atomic64_read(&ci->i_release_count); 748 } 749 750 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 751 { 752 return atomic64_read(&ci->i_complete_seq[0]) == 753 atomic64_read(&ci->i_release_count) && 754 atomic64_read(&ci->i_complete_seq[1]) == 755 atomic64_read(&ci->i_ordered_count); 756 } 757 758 static inline void ceph_dir_clear_complete(struct inode *inode) 759 { 760 __ceph_dir_clear_complete(ceph_inode(inode)); 761 } 762 763 static inline void ceph_dir_clear_ordered(struct inode *inode) 764 { 765 __ceph_dir_clear_ordered(ceph_inode(inode)); 766 } 767 768 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 769 { 770 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 771 smp_rmb(); 772 return ret; 773 } 774 775 /* find a specific frag @f */ 776 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 777 u32 f); 778 779 /* 780 * choose fragment for value @v. copy frag content to pfrag, if leaf 781 * exists 782 */ 783 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 784 struct ceph_inode_frag *pfrag, 785 int *found); 786 787 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 788 { 789 return (struct ceph_dentry_info *)dentry->d_fsdata; 790 } 791 792 /* 793 * caps helpers 794 */ 795 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 796 { 797 return !RB_EMPTY_ROOT(&ci->i_caps); 798 } 799 800 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 801 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 802 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 803 int t); 804 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 805 struct ceph_cap *cap); 806 807 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 808 { 809 int issued; 810 spin_lock(&ci->i_ceph_lock); 811 issued = __ceph_caps_issued(ci, NULL); 812 spin_unlock(&ci->i_ceph_lock); 813 return issued; 814 } 815 816 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 817 int mask, int touch) 818 { 819 int r; 820 spin_lock(&ci->i_ceph_lock); 821 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 822 spin_unlock(&ci->i_ceph_lock); 823 return r; 824 } 825 826 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 827 { 828 return ci->i_dirty_caps | ci->i_flushing_caps; 829 } 830 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 831 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 832 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 833 struct ceph_cap_flush **pcf); 834 835 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 836 struct ceph_cap *ocap, int mask); 837 extern int __ceph_caps_used(struct ceph_inode_info *ci); 838 839 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 840 { 841 return ci->i_nr_by_mode[0]; 842 } 843 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 844 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 845 846 /* what the mds thinks we want */ 847 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 848 849 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 850 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 851 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 852 struct ceph_mount_options *fsopt); 853 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 854 struct ceph_cap_reservation *ctx, int need); 855 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 856 struct ceph_cap_reservation *ctx); 857 extern void ceph_reservation_status(struct ceph_fs_client *client, 858 int *total, int *avail, int *used, 859 int *reserved, int *min); 860 extern void change_auth_cap_ses(struct ceph_inode_info *ci, 861 struct ceph_mds_session *session); 862 863 864 865 /* 866 * we keep buffered readdir results attached to file->private_data 867 */ 868 #define CEPH_F_SYNC 1 869 #define CEPH_F_ATEND 2 870 871 struct ceph_file_info { 872 short fmode; /* initialized on open */ 873 short flags; /* CEPH_F_* */ 874 875 spinlock_t rw_contexts_lock; 876 struct list_head rw_contexts; 877 878 u32 filp_gen; 879 }; 880 881 struct ceph_dir_file_info { 882 struct ceph_file_info file_info; 883 884 /* readdir: position within the dir */ 885 u32 frag; 886 struct ceph_mds_request *last_readdir; 887 888 /* readdir: position within a frag */ 889 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 890 char *last_name; /* last entry in previous chunk */ 891 long long dir_release_count; 892 long long dir_ordered_count; 893 int readdir_cache_idx; 894 895 /* used for -o dirstat read() on directory thing */ 896 char *dir_info; 897 int dir_info_len; 898 }; 899 900 struct ceph_rw_context { 901 struct list_head list; 902 struct task_struct *thread; 903 int caps; 904 }; 905 906 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 907 struct ceph_rw_context _name = { \ 908 .thread = current, \ 909 .caps = _caps, \ 910 } 911 912 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 913 struct ceph_rw_context *ctx) 914 { 915 spin_lock(&cf->rw_contexts_lock); 916 list_add(&ctx->list, &cf->rw_contexts); 917 spin_unlock(&cf->rw_contexts_lock); 918 } 919 920 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 921 struct ceph_rw_context *ctx) 922 { 923 spin_lock(&cf->rw_contexts_lock); 924 list_del(&ctx->list); 925 spin_unlock(&cf->rw_contexts_lock); 926 } 927 928 static inline struct ceph_rw_context* 929 ceph_find_rw_context(struct ceph_file_info *cf) 930 { 931 struct ceph_rw_context *ctx, *found = NULL; 932 spin_lock(&cf->rw_contexts_lock); 933 list_for_each_entry(ctx, &cf->rw_contexts, list) { 934 if (ctx->thread == current) { 935 found = ctx; 936 break; 937 } 938 } 939 spin_unlock(&cf->rw_contexts_lock); 940 return found; 941 } 942 943 struct ceph_readdir_cache_control { 944 struct folio *folio; 945 struct dentry **dentries; 946 int index; 947 }; 948 949 /* 950 * A "snap realm" describes a subset of the file hierarchy sharing 951 * the same set of snapshots that apply to it. The realms themselves 952 * are organized into a hierarchy, such that children inherit (some of) 953 * the snapshots of their parents. 954 * 955 * All inodes within the realm that have capabilities are linked into a 956 * per-realm list. 957 */ 958 struct ceph_snap_realm { 959 u64 ino; 960 struct inode *inode; 961 atomic_t nref; 962 struct rb_node node; 963 964 u64 created, seq; 965 u64 parent_ino; 966 u64 parent_since; /* snapid when our current parent became so */ 967 968 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 969 u32 num_prior_parent_snaps; /* had prior to parent_since */ 970 u64 *snaps; /* snaps specific to this realm */ 971 u32 num_snaps; 972 973 struct ceph_snap_realm *parent; 974 struct list_head children; /* list of child realms */ 975 struct list_head child_item; 976 977 struct list_head empty_item; /* if i have ref==0 */ 978 979 struct list_head dirty_item; /* if realm needs new context */ 980 981 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */ 982 983 /* the current set of snaps for this realm */ 984 struct ceph_snap_context *cached_context; 985 986 struct list_head inodes_with_caps; 987 spinlock_t inodes_with_caps_lock; 988 }; 989 990 static inline int default_congestion_kb(void) 991 { 992 int congestion_kb; 993 994 /* 995 * Copied from NFS 996 * 997 * congestion size, scale with available memory. 998 * 999 * 64MB: 8192k 1000 * 128MB: 11585k 1001 * 256MB: 16384k 1002 * 512MB: 23170k 1003 * 1GB: 32768k 1004 * 2GB: 46340k 1005 * 4GB: 65536k 1006 * 8GB: 92681k 1007 * 16GB: 131072k 1008 * 1009 * This allows larger machines to have larger/more transfers. 1010 * Limit the default to 256M 1011 */ 1012 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 1013 if (congestion_kb > 256*1024) 1014 congestion_kb = 256*1024; 1015 1016 return congestion_kb; 1017 } 1018 1019 1020 /* super.c */ 1021 extern int ceph_force_reconnect(struct super_block *sb); 1022 /* snap.c */ 1023 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 1024 u64 ino); 1025 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 1026 struct ceph_snap_realm *realm); 1027 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 1028 struct ceph_snap_realm *realm); 1029 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 1030 void *p, void *e, bool deletion, 1031 struct ceph_snap_realm **realm_ret); 1032 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm); 1033 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 1034 struct ceph_mds_session *session, 1035 struct ceph_msg *msg); 1036 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 1037 struct ceph_cap_snap *capsnap); 1038 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc); 1039 1040 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 1041 u64 snap); 1042 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 1043 struct ceph_snapid_map *sm); 1044 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 1045 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 1046 void ceph_umount_begin(struct super_block *sb); 1047 1048 1049 /* 1050 * a cap_snap is "pending" if it is still awaiting an in-progress 1051 * sync write (that may/may not still update size, mtime, etc.). 1052 */ 1053 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 1054 { 1055 return !list_empty(&ci->i_cap_snaps) && 1056 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 1057 ci_item)->writing; 1058 } 1059 1060 /* inode.c */ 1061 struct ceph_mds_reply_info_in; 1062 struct ceph_mds_reply_dirfrag; 1063 struct ceph_acl_sec_ctx; 1064 1065 extern const struct inode_operations ceph_file_iops; 1066 1067 extern struct inode *ceph_alloc_inode(struct super_block *sb); 1068 extern void ceph_evict_inode(struct inode *inode); 1069 extern void ceph_free_inode(struct inode *inode); 1070 1071 struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, 1072 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx); 1073 void ceph_as_ctx_to_req(struct ceph_mds_request *req, 1074 struct ceph_acl_sec_ctx *as_ctx); 1075 1076 extern struct inode *ceph_get_inode(struct super_block *sb, 1077 struct ceph_vino vino, 1078 struct inode *newino); 1079 extern struct inode *ceph_get_snapdir(struct inode *parent); 1080 extern int ceph_fill_file_size(struct inode *inode, int issued, 1081 u32 truncate_seq, u64 truncate_size, u64 size); 1082 extern void ceph_inode_set_subvolume(struct inode *inode, u64 subvolume_id); 1083 extern void ceph_fill_file_time(struct inode *inode, int issued, 1084 u64 time_warp_seq, struct timespec64 *ctime, 1085 struct timespec64 *mtime, 1086 struct timespec64 *atime); 1087 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 1088 struct ceph_mds_reply_info_in *iinfo, 1089 struct ceph_mds_reply_dirfrag *dirinfo, 1090 struct ceph_mds_session *session, int cap_fmode, 1091 struct ceph_cap_reservation *caps_reservation); 1092 extern int ceph_fill_trace(struct super_block *sb, 1093 struct ceph_mds_request *req); 1094 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1095 struct ceph_mds_session *session); 1096 1097 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 1098 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 1099 1100 void ceph_queue_inode_work(struct inode *inode, int work_bit); 1101 1102 static inline void ceph_queue_vmtruncate(struct inode *inode) 1103 { 1104 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); 1105 } 1106 1107 static inline void ceph_queue_invalidate(struct inode *inode) 1108 { 1109 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); 1110 } 1111 1112 static inline void ceph_queue_writeback(struct inode *inode) 1113 { 1114 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); 1115 } 1116 1117 static inline void ceph_queue_check_caps(struct inode *inode) 1118 { 1119 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); 1120 } 1121 1122 static inline void ceph_queue_flush_snaps(struct inode *inode) 1123 { 1124 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); 1125 } 1126 1127 extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask); 1128 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 1129 int mask, bool force); 1130 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 1131 { 1132 return __ceph_do_getattr(inode, NULL, mask, force); 1133 } 1134 extern int ceph_permission(struct mnt_idmap *idmap, 1135 struct inode *inode, int mask); 1136 1137 struct ceph_iattr { 1138 struct ceph_fscrypt_auth *fscrypt_auth; 1139 }; 1140 1141 extern int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, 1142 struct iattr *attr, struct ceph_iattr *cia); 1143 extern int ceph_setattr(struct mnt_idmap *idmap, 1144 struct dentry *dentry, struct iattr *attr); 1145 extern int ceph_getattr(struct mnt_idmap *idmap, 1146 const struct path *path, struct kstat *stat, 1147 u32 request_mask, unsigned int flags); 1148 void ceph_inode_shutdown(struct inode *inode); 1149 1150 static inline bool ceph_inode_is_shutdown(struct inode *inode) 1151 { 1152 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags); 1153 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 1154 int state = READ_ONCE(fsc->mount_state); 1155 1156 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN; 1157 } 1158 1159 /* xattr.c */ 1160 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 1161 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size); 1162 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 1163 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 1164 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 1165 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 1166 extern const struct xattr_handler * const ceph_xattr_handlers[]; 1167 1168 struct ceph_acl_sec_ctx { 1169 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1170 void *default_acl; 1171 void *acl; 1172 #endif 1173 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1174 struct lsm_context lsmctx; 1175 #endif 1176 #ifdef CONFIG_FS_ENCRYPTION 1177 struct ceph_fscrypt_auth *fscrypt_auth; 1178 #endif 1179 struct ceph_pagelist *pagelist; 1180 }; 1181 1182 #ifdef CONFIG_SECURITY 1183 extern bool ceph_security_xattr_deadlock(struct inode *in); 1184 extern bool ceph_security_xattr_wanted(struct inode *in); 1185 #else 1186 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1187 { 1188 return false; 1189 } 1190 static inline bool ceph_security_xattr_wanted(struct inode *in) 1191 { 1192 return false; 1193 } 1194 #endif 1195 1196 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1197 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1198 struct ceph_acl_sec_ctx *ctx); 1199 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1200 { 1201 security_inode_invalidate_secctx(inode); 1202 } 1203 #else 1204 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1205 struct ceph_acl_sec_ctx *ctx) 1206 { 1207 return 0; 1208 } 1209 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1210 { 1211 } 1212 #endif 1213 1214 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1215 1216 /* acl.c */ 1217 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1218 1219 struct posix_acl *ceph_get_acl(struct inode *, int, bool); 1220 int ceph_set_acl(struct mnt_idmap *idmap, 1221 struct dentry *dentry, struct posix_acl *acl, int type); 1222 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1223 struct ceph_acl_sec_ctx *as_ctx); 1224 void ceph_init_inode_acls(struct inode *inode, 1225 struct ceph_acl_sec_ctx *as_ctx); 1226 1227 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1228 { 1229 forget_all_cached_acls(inode); 1230 } 1231 1232 #else 1233 1234 #define ceph_get_acl NULL 1235 #define ceph_set_acl NULL 1236 1237 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1238 struct ceph_acl_sec_ctx *as_ctx) 1239 { 1240 return 0; 1241 } 1242 static inline void ceph_init_inode_acls(struct inode *inode, 1243 struct ceph_acl_sec_ctx *as_ctx) 1244 { 1245 } 1246 1247 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1248 { 1249 } 1250 1251 #endif 1252 1253 /* caps.c */ 1254 extern const char *ceph_cap_string(int c); 1255 extern void ceph_handle_caps(struct ceph_mds_session *session, 1256 struct ceph_msg *msg); 1257 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1258 struct ceph_cap_reservation *ctx); 1259 extern void ceph_add_cap(struct inode *inode, 1260 struct ceph_mds_session *session, u64 cap_id, 1261 unsigned issued, unsigned wanted, 1262 unsigned cap, unsigned seq, u64 realmino, int flags, 1263 struct ceph_cap **new_cap); 1264 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 1265 extern void ceph_remove_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, 1266 bool queue_release); 1267 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1268 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1269 struct ceph_cap *cap); 1270 extern int ceph_is_any_caps(struct inode *inode); 1271 1272 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1273 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1274 int datasync); 1275 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1276 struct ceph_mds_session *session); 1277 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1278 struct ceph_mds_session *session); 1279 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1280 struct ceph_inode_info *ci); 1281 extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, 1282 int mds); 1283 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1284 int mds); 1285 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1286 bool snap_rwsem_locked); 1287 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1288 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1289 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); 1290 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1291 struct ceph_snap_context *snapc); 1292 extern void __ceph_remove_capsnap(struct inode *inode, 1293 struct ceph_cap_snap *capsnap, 1294 bool *wake_ci, bool *wake_mdsc); 1295 extern void ceph_remove_capsnap(struct inode *inode, 1296 struct ceph_cap_snap *capsnap, 1297 bool *wake_ci, bool *wake_mdsc); 1298 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1299 struct ceph_mds_session **psession); 1300 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1301 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags); 1302 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1303 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1304 extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc); 1305 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1306 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1307 int mds, int drop, int unless, int force); 1308 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1309 struct inode *dir, 1310 int mds, int drop, int unless); 1311 1312 extern int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, 1313 int need, int want, loff_t endoff, int *got); 1314 extern int ceph_get_caps(struct file *filp, int need, int want, 1315 loff_t endoff, int *got); 1316 extern int ceph_try_get_caps(struct inode *inode, 1317 int need, int want, bool nonblock, int *got); 1318 1319 /* for counting open files by mode */ 1320 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1321 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1322 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1323 struct ceph_mds_client *mdsc, int fmode); 1324 1325 /* addr.c */ 1326 extern const struct address_space_operations ceph_aops; 1327 extern const struct netfs_request_ops ceph_netfs_ops; 1328 int ceph_mmap_prepare(struct vm_area_desc *desc); 1329 extern int ceph_uninline_data(struct file *file); 1330 extern int ceph_pool_perm_check(struct inode *inode, int need); 1331 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1332 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); 1333 1334 static inline bool ceph_has_inline_data(struct ceph_inode_info *ci) 1335 { 1336 if (ci->i_inline_version == CEPH_INLINE_NONE || 1337 ci->i_inline_version == 1) /* initial version, no data */ 1338 return false; 1339 return true; 1340 } 1341 1342 /* file.c */ 1343 extern const struct file_operations ceph_file_fops; 1344 1345 extern int ceph_renew_caps(struct inode *inode, int fmode); 1346 extern int ceph_open(struct inode *inode, struct file *file); 1347 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1348 struct file *file, unsigned flags, umode_t mode); 1349 extern ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos, 1350 struct iov_iter *to, int *retry_op, 1351 u64 *last_objver); 1352 extern int ceph_release(struct inode *inode, struct file *filp); 1353 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1354 char *data, size_t len); 1355 1356 /* dir.c */ 1357 extern const struct file_operations ceph_dir_fops; 1358 extern const struct file_operations ceph_snapdir_fops; 1359 extern const struct inode_operations ceph_dir_iops; 1360 extern const struct inode_operations ceph_snapdir_iops; 1361 extern const struct dentry_operations ceph_dentry_ops; 1362 1363 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1364 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1365 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req, 1366 struct dentry *dentry); 1367 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1368 struct dentry *dentry, int err); 1369 1370 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1371 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1372 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1373 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1374 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1375 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1376 1377 /* ioctl.c */ 1378 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1379 1380 /* export.c */ 1381 extern const struct export_operations ceph_export_ops; 1382 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1383 1384 /* locks.c */ 1385 extern __init void ceph_flock_init(void); 1386 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1387 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1388 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1389 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1390 struct ceph_filelock *flocks, 1391 int num_fcntl_locks, 1392 int num_flock_locks); 1393 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1394 struct ceph_pagelist *pagelist, 1395 int num_fcntl_locks, int num_flock_locks); 1396 1397 /* debugfs.c */ 1398 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1399 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1400 1401 /* quota.c */ 1402 1403 enum quota_get_realm { 1404 QUOTA_GET_MAX_FILES, 1405 QUOTA_GET_MAX_BYTES, 1406 QUOTA_GET_ANY 1407 }; 1408 1409 static inline bool __ceph_has_quota(struct ceph_inode_info *ci, 1410 enum quota_get_realm which) 1411 { 1412 bool has_quota = false; 1413 1414 switch (which) { 1415 case QUOTA_GET_MAX_BYTES: 1416 has_quota = !!ci->i_max_bytes; 1417 break; 1418 case QUOTA_GET_MAX_FILES: 1419 has_quota = !!ci->i_max_files; 1420 break; 1421 default: 1422 has_quota = !!(ci->i_max_files || ci->i_max_bytes); 1423 } 1424 return has_quota; 1425 } 1426 1427 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1428 1429 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1430 u64 max_bytes, u64 max_files) 1431 { 1432 bool had_quota, has_quota; 1433 had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1434 ci->i_max_bytes = max_bytes; 1435 ci->i_max_files = max_files; 1436 has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1437 1438 if (had_quota != has_quota) 1439 ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota); 1440 } 1441 1442 static inline int __ceph_sparse_read_ext_count(struct inode *inode, u64 len) 1443 { 1444 int cnt = 0; 1445 1446 if (IS_ENCRYPTED(inode)) { 1447 cnt = len >> CEPH_FSCRYPT_BLOCK_SHIFT; 1448 if (cnt > CEPH_SPARSE_EXT_ARRAY_INITIAL) 1449 cnt = 0; 1450 } 1451 1452 return cnt; 1453 } 1454 1455 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1456 struct ceph_mds_session *session, 1457 struct ceph_msg *msg); 1458 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1459 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1460 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1461 loff_t newlen); 1462 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1463 loff_t newlen); 1464 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1465 struct kstatfs *buf); 1466 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1467 1468 bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc, 1469 struct ceph_mds_session *session); 1470 void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc); 1471 bool ceph_inc_osd_stopping_blocker(struct ceph_mds_client *mdsc); 1472 void ceph_dec_osd_stopping_blocker(struct ceph_mds_client *mdsc); 1473 #endif /* _FS_CEPH_SUPER_H */ 1474