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 #define CEPH_MOUNT_OPT_NEARFULL_SYNC (1<<18) /* sync writes when nearfull */ 49 50 #define CEPH_MOUNT_OPT_DEFAULT \ 51 (CEPH_MOUNT_OPT_DCACHE | \ 52 CEPH_MOUNT_OPT_NOCOPYFROM | \ 53 CEPH_MOUNT_OPT_ASYNC_DIROPS) 54 55 #define ceph_set_mount_opt(fsc, opt) \ 56 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt 57 #define ceph_clear_mount_opt(fsc, opt) \ 58 (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt 59 #define ceph_test_mount_opt(fsc, opt) \ 60 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 61 62 /* max size of osd read request, limited by libceph */ 63 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN 64 /* osd has a configurable limitation of max write size. 65 * CEPH_MSG_MAX_DATA_LEN should be small enough. */ 66 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN 67 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ 68 #define CEPH_MAX_READDIR_DEFAULT 1024 69 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 70 #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 71 72 /* 73 * Delay telling the MDS we no longer want caps, in case we reopen 74 * the file. Delay a minimum amount of time, even if we send a cap 75 * message for some other reason. Otherwise, take the oppotunity to 76 * update the mds to avoid sending another message later. 77 */ 78 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ 79 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ 80 81 struct ceph_mount_options { 82 unsigned int flags; 83 84 unsigned int wsize; /* max write size */ 85 unsigned int rsize; /* max read size */ 86 unsigned int rasize; /* max readahead */ 87 unsigned int congestion_kb; /* max writeback in flight */ 88 unsigned int caps_wanted_delay_min, caps_wanted_delay_max; 89 int caps_max; 90 unsigned int max_readdir; /* max readdir result (entries) */ 91 unsigned int max_readdir_bytes; /* max readdir result (bytes) */ 92 93 bool new_dev_syntax; 94 95 /* 96 * everything above this point can be memcmp'd; everything below 97 * is handled in compare_mount_options() 98 */ 99 100 char *snapdir_name; /* default ".snap" */ 101 char *mds_namespace; /* default NULL */ 102 char *server_path; /* default NULL (means "/") */ 103 char *fscache_uniq; /* default NULL */ 104 char *mon_addr; 105 struct fscrypt_dummy_policy dummy_enc_policy; 106 }; 107 108 #define CEPH_NAMESPACE_WILDCARD "*" 109 110 static inline bool ceph_namespace_match(const char *pattern, 111 const char *target) 112 { 113 if (!pattern || !pattern[0] || 114 !strcmp(pattern, CEPH_NAMESPACE_WILDCARD)) 115 return true; 116 117 return !strcmp(pattern, target); 118 } 119 120 /* 121 * Check if the mds namespace in ceph_mount_options matches 122 * the passed in namespace string. First time match (when 123 * ->mds_namespace is NULL) is treated specially, since 124 * ->mds_namespace needs to be initialized by the caller. 125 */ 126 static inline bool namespace_equals(struct ceph_mount_options *fsopt, 127 const char *namespace, size_t len) 128 { 129 return !(fsopt->mds_namespace && 130 (strlen(fsopt->mds_namespace) != len || 131 strncmp(fsopt->mds_namespace, namespace, len))); 132 } 133 134 /* mount state */ 135 enum { 136 CEPH_MOUNT_MOUNTING, 137 CEPH_MOUNT_MOUNTED, 138 CEPH_MOUNT_UNMOUNTING, 139 CEPH_MOUNT_UNMOUNTED, 140 CEPH_MOUNT_SHUTDOWN, 141 CEPH_MOUNT_RECOVER, 142 CEPH_MOUNT_FENCE_IO, 143 }; 144 145 #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8 146 147 struct ceph_fs_client { 148 struct super_block *sb; 149 150 struct list_head metric_wakeup; 151 152 struct ceph_mount_options *mount_options; 153 struct ceph_client *client; 154 155 int mount_state; 156 157 bool blocklisted; 158 159 bool have_copy_from2; 160 161 u32 filp_gen; 162 loff_t max_file_size; 163 164 struct ceph_mds_client *mdsc; 165 166 atomic_long_t writeback_count; 167 bool write_congested; 168 169 struct workqueue_struct *inode_wq; 170 struct workqueue_struct *cap_wq; 171 172 DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS); 173 spinlock_t async_unlink_conflict_lock; 174 175 #ifdef CONFIG_DEBUG_FS 176 struct dentry *debugfs_dentry_lru, *debugfs_caps; 177 struct dentry *debugfs_congestion_kb; 178 struct dentry *debugfs_bdi; 179 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 180 struct dentry *debugfs_status; 181 struct dentry *debugfs_mds_sessions; 182 struct dentry *debugfs_metrics_dir; 183 struct dentry *debugfs_reset_dir; 184 struct dentry *debugfs_subvolume_metrics; 185 #endif 186 187 #ifdef CONFIG_CEPH_FSCACHE 188 struct fscache_volume *fscache; 189 #endif 190 #ifdef CONFIG_FS_ENCRYPTION 191 struct fscrypt_dummy_policy fsc_dummy_enc_policy; 192 #endif 193 }; 194 195 /* 196 * File i/o capability. This tracks shared state with the metadata 197 * server that allows us to cache or writeback attributes or to read 198 * and write data. For any given inode, we should have one or more 199 * capabilities, one issued by each metadata server, and our 200 * cumulative access is the OR of all issued capabilities. 201 * 202 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 203 * session capability lists. 204 */ 205 struct ceph_cap { 206 struct ceph_inode_info *ci; 207 208 /** 209 * Per-ci cap tree. Protected with 210 * `ceph_inode_info.i_ceph_lock`. 211 * 212 * Clearing this field with RB_CLEAR_NODE() requires holding 213 * both `ceph_inode_info.i_ceph_lock` and 214 * `ceph_mds_session->s_cap_lock`. Calling RB_EMPTY_NODE() 215 * (via ceph_cap_is_removed()) requires holding at least one 216 * of these. 217 */ 218 struct rb_node ci_node; 219 220 struct ceph_mds_session *session; 221 struct list_head session_caps; /* per-session caplist */ 222 u64 cap_id; /* unique cap id (mds provided) */ 223 union { 224 /* in-use caps */ 225 struct { 226 int issued; /* latest, from the mds */ 227 int implemented; /* implemented superset of 228 issued (for revocation) */ 229 int mds; /* mds index for this cap */ 230 int mds_wanted; /* caps wanted from this mds */ 231 }; 232 /* caps to release */ 233 struct { 234 u64 cap_ino; 235 int queue_release; 236 }; 237 }; 238 u32 seq, issue_seq, mseq; 239 u32 cap_gen; /* active/stale cycle */ 240 unsigned long last_used; 241 struct list_head caps_item; 242 }; 243 244 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ 245 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ 246 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ 247 #define CHECK_CAPS_FLUSH_FORCE 8 /* force flush any caps */ 248 249 struct ceph_cap_flush { 250 u64 tid; 251 int caps; 252 bool wake; /* wake up flush waiters when finish ? */ 253 bool is_capsnap; /* true means capsnap */ 254 struct list_head g_list; // global 255 struct list_head i_list; // per inode 256 struct ceph_inode_info *ci; 257 }; 258 259 /* 260 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 261 * we first complete any in-process sync writes and writeback any dirty 262 * data before flushing the snapped state (tracked here) back to the MDS. 263 */ 264 struct ceph_cap_snap { 265 refcount_t nref; 266 struct list_head ci_item; 267 268 struct ceph_cap_flush cap_flush; 269 270 u64 follows; 271 int issued, dirty; 272 struct ceph_snap_context *context; 273 274 umode_t mode; 275 kuid_t uid; 276 kgid_t gid; 277 278 struct ceph_buffer *xattr_blob; 279 u64 xattr_version; 280 281 u64 size; 282 u64 change_attr; 283 struct timespec64 mtime, atime, ctime, btime; 284 u64 time_warp_seq; 285 u64 truncate_size; 286 u32 truncate_seq; 287 int writing; /* a sync write is still in progress */ 288 int dirty_pages; /* dirty pages awaiting writeback */ 289 bool inline_data; 290 bool need_flush; 291 }; 292 293 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 294 { 295 if (refcount_dec_and_test(&capsnap->nref)) { 296 if (capsnap->xattr_blob) 297 ceph_buffer_put(capsnap->xattr_blob); 298 kmem_cache_free(ceph_cap_snap_cachep, capsnap); 299 } 300 } 301 302 /* 303 * The frag tree describes how a directory is fragmented, potentially across 304 * multiple metadata servers. It is also used to indicate points where 305 * metadata authority is delegated, and whether/where metadata is replicated. 306 * 307 * A _leaf_ frag will be present in the i_fragtree IFF there is 308 * delegation info. That is, if mds >= 0 || ndist > 0. 309 */ 310 #define CEPH_MAX_DIRFRAG_REP 4 311 312 struct ceph_inode_frag { 313 struct rb_node node; 314 315 /* fragtree state */ 316 u32 frag; 317 int split_by; /* i.e. 2^(split_by) children */ 318 319 /* delegation and replication info */ 320 int mds; /* -1 if same authority as parent */ 321 int ndist; /* >0 if replicated */ 322 int dist[CEPH_MAX_DIRFRAG_REP]; 323 }; 324 325 /* 326 * We cache inode xattrs as an encoded blob until they are first used, 327 * at which point we parse them into an rbtree. 328 */ 329 struct ceph_inode_xattr { 330 struct rb_node node; 331 332 const char *name; 333 int name_len; 334 const char *val; 335 int val_len; 336 int dirty; 337 338 int should_free_name; 339 int should_free_val; 340 }; 341 342 /* 343 * Ceph dentry state 344 */ 345 struct ceph_dentry_info { 346 struct dentry *dentry; 347 struct ceph_mds_session *lease_session; 348 struct list_head lease_list; 349 struct hlist_node hnode; 350 unsigned long flags; 351 int lease_shared_gen; 352 u32 lease_gen; 353 u32 lease_seq; 354 unsigned long lease_renew_after, lease_renew_from; 355 unsigned long time; 356 u64 offset; 357 }; 358 359 #define CEPH_DENTRY_REFERENCED (1 << 0) 360 #define CEPH_DENTRY_LEASE_LIST (1 << 1) 361 #define CEPH_DENTRY_SHRINK_LIST (1 << 2) 362 #define CEPH_DENTRY_PRIMARY_LINK (1 << 3) 363 #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4) 364 #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT) 365 #define CEPH_DENTRY_ASYNC_CREATE_BIT (5) 366 #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT) 367 368 struct ceph_inode_xattrs_info { 369 /* 370 * (still encoded) xattr blob. we avoid the overhead of parsing 371 * this until someone actually calls getxattr, etc. 372 * 373 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 374 * NULL means we don't know. 375 */ 376 struct ceph_buffer *blob, *prealloc_blob; 377 378 struct rb_root index; 379 bool dirty; 380 int count; 381 int names_size; 382 int vals_size; 383 u64 version, index_version; 384 }; 385 386 /* 387 * Ceph inode. 388 */ 389 struct ceph_inode_info { 390 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 391 struct ceph_vino i_vino; /* ceph ino + snap */ 392 393 spinlock_t i_ceph_lock; 394 395 u64 i_version; 396 u64 i_inline_version; 397 u32 i_time_warp_seq; 398 399 unsigned long i_ceph_flags; 400 atomic64_t i_release_count; 401 atomic64_t i_ordered_count; 402 atomic64_t i_complete_seq[2]; 403 404 struct ceph_dir_layout i_dir_layout; 405 struct ceph_file_layout i_layout; 406 struct ceph_file_layout i_cached_layout; // for async creates 407 char *i_symlink; 408 409 /* for dirs */ 410 struct timespec64 i_rctime; 411 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps; 412 u64 i_files, i_subdirs; 413 414 /* quotas */ 415 u64 i_max_bytes, i_max_files; 416 417 /* 418 * Subvolume ID this inode belongs to. CEPH_SUBVOLUME_ID_NONE (0) 419 * means unknown/unset, matching the FUSE client convention. 420 * Once set to a valid (non-zero) value, it should not change 421 * during the inode's lifetime. 422 */ 423 #define CEPH_SUBVOLUME_ID_NONE 0 424 u64 i_subvolume_id; 425 426 s32 i_dir_pin; 427 428 struct rb_root i_fragtree; 429 int i_fragtree_nsplits; 430 struct mutex i_fragtree_mutex; 431 432 struct ceph_inode_xattrs_info i_xattrs; 433 434 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 435 * s_mutex. */ 436 struct rb_root i_caps; /* cap list */ 437 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 438 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 439 440 /* 441 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty 442 * is protected by the mdsc->cap_dirty_lock, but each individual item 443 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty 444 * requires the mdsc->cap_dirty_lock. List presence for an item can 445 * be tested under the i_ceph_lock. Changing anything requires both. 446 */ 447 struct list_head i_dirty_item; 448 449 /* 450 * Link to session's s_cap_flushing list. Protected in a similar 451 * fashion to i_dirty_item, but also by the s_mutex for changes. The 452 * s_cap_flushing list can be walked while holding either the s_mutex 453 * or msdc->cap_dirty_lock. List presence can also be checked while 454 * holding the i_ceph_lock for this inode. 455 */ 456 struct list_head i_flushing_item; 457 458 /* we need to track cap writeback on a per-cap-bit basis, to allow 459 * overlapping, pipelined cap flushes to the mds. we can probably 460 * reduce the tid to 8 bits if we're concerned about inode size. */ 461 struct ceph_cap_flush *i_prealloc_cap_flush; 462 struct list_head i_cap_flush_list; 463 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 464 unsigned long i_hold_caps_max; /* jiffies */ 465 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 466 struct ceph_cap_reservation i_cap_migration_resv; 467 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 468 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 469 dirty|flushing caps */ 470 unsigned i_snap_caps; /* cap bits for snapped files */ 471 /* 472 * Written under i_ceph_lock, read via READ_ONCE() 473 * from diagnostic paths. 474 */ 475 u64 i_last_cap_flush_ack; 476 477 unsigned long i_last_rd; 478 unsigned long i_last_wr; 479 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ 480 481 struct mutex i_truncate_mutex; 482 u32 i_truncate_seq; /* last truncate to smaller size */ 483 u64 i_truncate_size; /* and the size we last truncated down to */ 484 int i_truncate_pending; /* still need to call vmtruncate */ 485 /* 486 * For none fscrypt case it equals to i_truncate_size or it will 487 * equals to fscrypt_file_size 488 */ 489 u64 i_truncate_pagecache_size; 490 491 u64 i_max_size; /* max file size authorized by mds */ 492 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 493 u64 i_wanted_max_size; /* offset we'd like to write too */ 494 u64 i_requested_max_size; /* max_size we've requested */ 495 496 /* held references to caps */ 497 int i_pin_ref; 498 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; 499 int i_wrbuffer_ref, i_wrbuffer_ref_head; 500 atomic_t i_filelock_ref; 501 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ 502 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 503 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 504 505 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 506 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ 507 spinlock_t i_unsafe_lock; 508 509 union { 510 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 511 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ 512 }; 513 struct list_head i_snap_realm_item; 514 struct list_head i_snap_flush_item; 515 struct timespec64 i_btime; 516 struct timespec64 i_snap_btime; 517 518 struct work_struct i_work; 519 unsigned long i_work_mask; 520 521 #ifdef CONFIG_FS_ENCRYPTION 522 struct fscrypt_inode_info *i_crypt_info; 523 u32 fscrypt_auth_len; 524 u32 fscrypt_file_len; 525 u8 *fscrypt_auth; 526 u8 *fscrypt_file; 527 #endif 528 }; 529 530 struct ceph_netfs_request_data { 531 int caps; 532 533 /* 534 * Maximum size of a file readahead request. 535 * The fadvise could update the bdi's default ra_pages. 536 */ 537 unsigned int file_ra_pages; 538 539 /* Set it if fadvise disables file readahead entirely */ 540 bool file_ra_disabled; 541 }; 542 543 static inline struct ceph_inode_info * 544 ceph_inode(const struct inode *inode) 545 { 546 return container_of(inode, struct ceph_inode_info, netfs.inode); 547 } 548 549 static inline struct ceph_fs_client * 550 ceph_inode_to_fs_client(const struct inode *inode) 551 { 552 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 553 } 554 555 static inline struct ceph_fs_client * 556 ceph_sb_to_fs_client(const struct super_block *sb) 557 { 558 return (struct ceph_fs_client *)sb->s_fs_info; 559 } 560 561 static inline struct ceph_mds_client * 562 ceph_sb_to_mdsc(const struct super_block *sb) 563 { 564 return (struct ceph_mds_client *)ceph_sb_to_fs_client(sb)->mdsc; 565 } 566 567 static inline struct ceph_client * 568 ceph_inode_to_client(const struct inode *inode) 569 { 570 return (struct ceph_client *)ceph_inode_to_fs_client(inode)->client; 571 } 572 573 static inline struct ceph_vino 574 ceph_vino(const struct inode *inode) 575 { 576 return ceph_inode(inode)->i_vino; 577 } 578 579 static inline u32 ceph_ino_to_ino32(u64 vino) 580 { 581 u32 ino = vino & 0xffffffff; 582 ino ^= vino >> 32; 583 if (!ino) 584 ino = 2; 585 return ino; 586 } 587 588 /* 589 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on 590 * some arches. We generally do not use this value inside the ceph driver, but 591 * we do want to set it to something, so that generic vfs code has an 592 * appropriate value for tracepoints and the like. 593 */ 594 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) 595 { 596 if (sizeof(ino_t) == sizeof(u32)) 597 return ceph_ino_to_ino32(vino.ino); 598 return (ino_t)vino.ino; 599 } 600 601 /* for printf-style formatting */ 602 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 603 604 static inline u64 ceph_ino(struct inode *inode) 605 { 606 return ceph_inode(inode)->i_vino.ino; 607 } 608 609 static inline u64 ceph_snap(struct inode *inode) 610 { 611 return ceph_inode(inode)->i_vino.snap; 612 } 613 614 /** 615 * ceph_present_ino - format an inode number for presentation to userland 616 * @sb: superblock where the inode lives 617 * @ino: inode number to (possibly) convert 618 * 619 * If the user mounted with the ino32 option, then the 64-bit value needs 620 * to be converted to something that can fit inside 32 bits. Note that 621 * internal kernel code never uses this value, so this is entirely for 622 * userland consumption. 623 */ 624 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) 625 { 626 if (unlikely(ceph_test_mount_opt(ceph_sb_to_fs_client(sb), INO32))) 627 return ceph_ino_to_ino32(ino); 628 return ino; 629 } 630 631 static inline u64 ceph_present_inode(struct inode *inode) 632 { 633 return ceph_present_ino(inode->i_sb, ceph_ino(inode)); 634 } 635 636 static inline int ceph_ino_compare(struct inode *inode, void *data) 637 { 638 struct ceph_vino *pvino = (struct ceph_vino *)data; 639 struct ceph_inode_info *ci = ceph_inode(inode); 640 return ci->i_vino.ino == pvino->ino && 641 ci->i_vino.snap == pvino->snap; 642 } 643 644 /* 645 * The MDS reserves a set of inodes for its own usage. These should never 646 * be accessible by clients, and so the MDS has no reason to ever hand these 647 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE. 648 * 649 * These come from src/mds/mdstypes.h in the ceph sources. 650 */ 651 #define CEPH_MAX_MDS 0x100 652 #define CEPH_NUM_STRAY 10 653 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS) 654 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS) 655 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY)) 656 657 /* 658 * Upper bound on the number of delegated inodes a single MDS session may 659 * hold. The MDS normally hands out a small preallocation window (the 660 * userspace mds_client_prealloc_inos option defaults to 1000) and refills 661 * it as the client consumes entries. This leaves generous headroom while 662 * bounding the CPU and memory a malformed delegation interval can consume. 663 */ 664 #define CEPH_MAX_DELEG_INOS 8192 665 666 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino) 667 { 668 if (vino.ino >= CEPH_INO_SYSTEM_BASE || 669 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET) 670 return false; 671 672 /* Don't warn on mdsdirs */ 673 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET, 674 "Attempt to access reserved inode number 0x%llx", 675 vino.ino); 676 return true; 677 } 678 679 static inline struct inode *ceph_find_inode(struct super_block *sb, 680 struct ceph_vino vino) 681 { 682 if (ceph_vino_is_reserved(vino)) 683 return NULL; 684 685 /* 686 * NB: The hashval will be run through the fs/inode.c hash function 687 * anyway, so there is no need to squash the inode number down to 688 * 32-bits first. Just use low-order bits on arches with 32-bit long. 689 */ 690 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino); 691 } 692 693 694 /* 695 * Ceph inode. 696 */ 697 #define CEPH_I_DIR_ORDERED_BIT (0) /* dentries in dir are ordered */ 698 /* bit 1 historically unused */ 699 #define CEPH_I_FLUSH_BIT (2) /* do not delay flush of dirty metadata */ 700 #define CEPH_I_POOL_PERM_BIT (3) /* pool rd/wr bits are valid */ 701 #define CEPH_I_POOL_RD_BIT (4) /* can read from pool */ 702 #define CEPH_I_POOL_WR_BIT (5) /* can write to pool */ 703 #define CEPH_I_SEC_INITED_BIT (6) /* security initialized */ 704 #define CEPH_I_KICK_FLUSH_BIT (7) /* kick flushing caps */ 705 #define CEPH_I_FLUSH_SNAPS_BIT (8) /* need flush snaps */ 706 #define CEPH_I_ERROR_WRITE_BIT (9) /* have seen write errors */ 707 #define CEPH_I_ERROR_FILELOCK_BIT (10) /* have seen file lock errors */ 708 #define CEPH_I_ODIRECT_BIT (11) /* inode in direct I/O mode */ 709 #define CEPH_I_ASYNC_CREATE_BIT (12) /* async create in flight for this */ 710 #define CEPH_I_SHUTDOWN_BIT (13) /* inode is no longer usable */ 711 #define CEPH_I_ASYNC_CHECK_CAPS_BIT (14) /* check caps after async creating finishes */ 712 #define CEPH_I_FLUSH_FORCE_BIT (15) /* a revoke's response was deferred; 713 * force a cap message to the MDS once 714 * the deferred work completes 715 */ 716 717 #define CEPH_I_DIR_ORDERED (1 << CEPH_I_DIR_ORDERED_BIT) 718 #define CEPH_I_FLUSH (1 << CEPH_I_FLUSH_BIT) 719 #define CEPH_I_POOL_PERM (1 << CEPH_I_POOL_PERM_BIT) 720 #define CEPH_I_POOL_RD (1 << CEPH_I_POOL_RD_BIT) 721 #define CEPH_I_POOL_WR (1 << CEPH_I_POOL_WR_BIT) 722 #define CEPH_I_SEC_INITED (1 << CEPH_I_SEC_INITED_BIT) 723 #define CEPH_I_KICK_FLUSH (1 << CEPH_I_KICK_FLUSH_BIT) 724 #define CEPH_I_FLUSH_SNAPS (1 << CEPH_I_FLUSH_SNAPS_BIT) 725 #define CEPH_I_ODIRECT (1 << CEPH_I_ODIRECT_BIT) 726 #define CEPH_I_ASYNC_CREATE (1 << CEPH_I_ASYNC_CREATE_BIT) 727 #define CEPH_I_SHUTDOWN (1 << CEPH_I_SHUTDOWN_BIT) 728 #define CEPH_I_FLUSH_FORCE (1 << CEPH_I_FLUSH_FORCE_BIT) 729 730 /* 731 * Masks of ceph inode work. 732 */ 733 #define CEPH_I_WORK_WRITEBACK 0 734 #define CEPH_I_WORK_INVALIDATE_PAGES 1 735 #define CEPH_I_WORK_VMTRUNCATE 2 736 #define CEPH_I_WORK_CHECK_CAPS 3 737 #define CEPH_I_WORK_FLUSH_SNAPS 4 738 739 /* 740 * We set the ERROR_WRITE bit when we start seeing write errors on an inode 741 * and then clear it when they start succeeding. The write submission code 742 * just takes this as a hint, so we're not too worried if a few slip through 743 * in either direction. 744 */ 745 static inline void ceph_set_error_write(struct ceph_inode_info *ci) 746 { 747 set_bit(CEPH_I_ERROR_WRITE_BIT, &ci->i_ceph_flags); 748 } 749 750 static inline void ceph_clear_error_write(struct ceph_inode_info *ci) 751 { 752 clear_bit(CEPH_I_ERROR_WRITE_BIT, &ci->i_ceph_flags); 753 } 754 755 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 756 long long release_count, 757 long long ordered_count) 758 { 759 /* 760 * Makes sure operations that setup readdir cache (update page 761 * cache and i_size) are strongly ordered w.r.t. the following 762 * atomic64_set() operations. 763 */ 764 smp_mb(); 765 atomic64_set(&ci->i_complete_seq[0], release_count); 766 atomic64_set(&ci->i_complete_seq[1], ordered_count); 767 } 768 769 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 770 { 771 atomic64_inc(&ci->i_release_count); 772 } 773 774 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) 775 { 776 atomic64_inc(&ci->i_ordered_count); 777 } 778 779 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 780 { 781 return atomic64_read(&ci->i_complete_seq[0]) == 782 atomic64_read(&ci->i_release_count); 783 } 784 785 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) 786 { 787 return atomic64_read(&ci->i_complete_seq[0]) == 788 atomic64_read(&ci->i_release_count) && 789 atomic64_read(&ci->i_complete_seq[1]) == 790 atomic64_read(&ci->i_ordered_count); 791 } 792 793 static inline void ceph_dir_clear_complete(struct inode *inode) 794 { 795 __ceph_dir_clear_complete(ceph_inode(inode)); 796 } 797 798 static inline void ceph_dir_clear_ordered(struct inode *inode) 799 { 800 __ceph_dir_clear_ordered(ceph_inode(inode)); 801 } 802 803 static inline bool ceph_dir_is_complete_ordered(struct inode *inode) 804 { 805 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode)); 806 smp_rmb(); 807 return ret; 808 } 809 810 /* find a specific frag @f */ 811 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 812 u32 f); 813 814 /* 815 * choose fragment for value @v. copy frag content to pfrag, if leaf 816 * exists 817 */ 818 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 819 struct ceph_inode_frag *pfrag, 820 int *found); 821 822 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) 823 { 824 return (struct ceph_dentry_info *)dentry->d_fsdata; 825 } 826 827 /* 828 * caps helpers 829 */ 830 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 831 { 832 return !RB_EMPTY_ROOT(&ci->i_caps); 833 } 834 835 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 836 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 837 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, 838 int t); 839 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 840 struct ceph_cap *cap); 841 842 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 843 { 844 int issued; 845 spin_lock(&ci->i_ceph_lock); 846 issued = __ceph_caps_issued(ci, NULL); 847 spin_unlock(&ci->i_ceph_lock); 848 return issued; 849 } 850 851 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, 852 int mask, int touch) 853 { 854 int r; 855 spin_lock(&ci->i_ceph_lock); 856 r = __ceph_caps_issued_mask_metric(ci, mask, touch); 857 spin_unlock(&ci->i_ceph_lock); 858 return r; 859 } 860 861 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 862 { 863 return ci->i_dirty_caps | ci->i_flushing_caps; 864 } 865 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); 866 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); 867 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, 868 struct ceph_cap_flush **pcf); 869 870 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 871 struct ceph_cap *ocap, int mask); 872 extern int __ceph_caps_used(struct ceph_inode_info *ci); 873 874 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) 875 { 876 return ci->i_nr_by_mode[0]; 877 } 878 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 879 extern int __ceph_caps_wanted(struct ceph_inode_info *ci); 880 881 /* what the mds thinks we want */ 882 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); 883 884 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 885 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 886 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, 887 struct ceph_mount_options *fsopt); 888 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 889 struct ceph_cap_reservation *ctx, int need); 890 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, 891 struct ceph_cap_reservation *ctx); 892 extern void ceph_reservation_status(struct ceph_fs_client *client, 893 int *total, int *avail, int *used, 894 int *reserved, int *min); 895 extern void change_auth_cap_ses(struct ceph_inode_info *ci, 896 struct ceph_mds_session *session); 897 898 899 900 /* 901 * we keep buffered readdir results attached to file->private_data 902 */ 903 #define CEPH_F_SYNC 1 904 #define CEPH_F_ATEND 2 905 906 struct ceph_file_info { 907 short fmode; /* initialized on open */ 908 short flags; /* CEPH_F_* */ 909 910 spinlock_t rw_contexts_lock; 911 struct list_head rw_contexts; 912 913 u32 filp_gen; 914 }; 915 916 struct ceph_dir_file_info { 917 struct ceph_file_info file_info; 918 919 /* readdir: position within the dir */ 920 u32 frag; 921 struct ceph_mds_request *last_readdir; 922 923 /* readdir: position within a frag */ 924 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 925 char *last_name; /* last entry in previous chunk */ 926 long long dir_release_count; 927 long long dir_ordered_count; 928 int readdir_cache_idx; 929 930 /* used for -o dirstat read() on directory thing */ 931 char *dir_info; 932 int dir_info_len; 933 }; 934 935 struct ceph_rw_context { 936 struct list_head list; 937 struct task_struct *thread; 938 int caps; 939 }; 940 941 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ 942 struct ceph_rw_context _name = { \ 943 .thread = current, \ 944 .caps = _caps, \ 945 } 946 947 static inline void ceph_add_rw_context(struct ceph_file_info *cf, 948 struct ceph_rw_context *ctx) 949 { 950 spin_lock(&cf->rw_contexts_lock); 951 list_add(&ctx->list, &cf->rw_contexts); 952 spin_unlock(&cf->rw_contexts_lock); 953 } 954 955 static inline void ceph_del_rw_context(struct ceph_file_info *cf, 956 struct ceph_rw_context *ctx) 957 { 958 spin_lock(&cf->rw_contexts_lock); 959 list_del(&ctx->list); 960 spin_unlock(&cf->rw_contexts_lock); 961 } 962 963 static inline struct ceph_rw_context* 964 ceph_find_rw_context(struct ceph_file_info *cf) 965 { 966 struct ceph_rw_context *ctx, *found = NULL; 967 spin_lock(&cf->rw_contexts_lock); 968 list_for_each_entry(ctx, &cf->rw_contexts, list) { 969 if (ctx->thread == current) { 970 found = ctx; 971 break; 972 } 973 } 974 spin_unlock(&cf->rw_contexts_lock); 975 return found; 976 } 977 978 struct ceph_readdir_cache_control { 979 struct folio *folio; 980 struct dentry **dentries; 981 int index; 982 }; 983 984 /* 985 * A "snap realm" describes a subset of the file hierarchy sharing 986 * the same set of snapshots that apply to it. The realms themselves 987 * are organized into a hierarchy, such that children inherit (some of) 988 * the snapshots of their parents. 989 * 990 * All inodes within the realm that have capabilities are linked into a 991 * per-realm list. 992 */ 993 struct ceph_snap_realm { 994 u64 ino; 995 struct inode *inode; 996 atomic_t nref; 997 struct rb_node node; 998 999 u64 created, seq; 1000 u64 parent_ino; 1001 u64 parent_since; /* snapid when our current parent became so */ 1002 1003 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 1004 u32 num_prior_parent_snaps; /* had prior to parent_since */ 1005 u64 *snaps; /* snaps specific to this realm */ 1006 u32 num_snaps; 1007 1008 struct ceph_snap_realm *parent; 1009 struct list_head children; /* list of child realms */ 1010 struct list_head child_item; 1011 1012 struct list_head empty_item; /* if i have ref==0 */ 1013 1014 struct list_head dirty_item; /* if realm needs new context */ 1015 1016 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */ 1017 1018 /* the current set of snaps for this realm */ 1019 struct ceph_snap_context *cached_context; 1020 1021 struct list_head inodes_with_caps; 1022 spinlock_t inodes_with_caps_lock; 1023 }; 1024 1025 static inline int default_congestion_kb(void) 1026 { 1027 int congestion_kb; 1028 1029 /* 1030 * Copied from NFS 1031 * 1032 * congestion size, scale with available memory. 1033 * 1034 * 64MB: 8192k 1035 * 128MB: 11585k 1036 * 256MB: 16384k 1037 * 512MB: 23170k 1038 * 1GB: 32768k 1039 * 2GB: 46340k 1040 * 4GB: 65536k 1041 * 8GB: 92681k 1042 * 16GB: 131072k 1043 * 1044 * This allows larger machines to have larger/more transfers. 1045 * Limit the default to 256M 1046 */ 1047 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); 1048 if (congestion_kb > 256*1024) 1049 congestion_kb = 256*1024; 1050 1051 return congestion_kb; 1052 } 1053 1054 1055 /* super.c */ 1056 extern int ceph_force_reconnect(struct super_block *sb); 1057 /* snap.c */ 1058 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 1059 u64 ino); 1060 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 1061 struct ceph_snap_realm *realm); 1062 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 1063 struct ceph_snap_realm *realm); 1064 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 1065 void *p, void *e, bool deletion, 1066 struct ceph_snap_realm **realm_ret); 1067 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm); 1068 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 1069 struct ceph_mds_session *session, 1070 struct ceph_msg *msg); 1071 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 1072 struct ceph_cap_snap *capsnap); 1073 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc); 1074 1075 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, 1076 u64 snap); 1077 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, 1078 struct ceph_snapid_map *sm); 1079 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); 1080 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); 1081 void ceph_umount_begin(struct super_block *sb); 1082 1083 1084 /* 1085 * a cap_snap is "pending" if it is still awaiting an in-progress 1086 * sync write (that may/may not still update size, mtime, etc.). 1087 */ 1088 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 1089 { 1090 return !list_empty(&ci->i_cap_snaps) && 1091 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, 1092 ci_item)->writing; 1093 } 1094 1095 /* inode.c */ 1096 struct ceph_mds_reply_info_in; 1097 struct ceph_mds_reply_dirfrag; 1098 struct ceph_acl_sec_ctx; 1099 1100 extern const struct inode_operations ceph_file_iops; 1101 1102 extern struct inode *ceph_alloc_inode(struct super_block *sb); 1103 extern void ceph_evict_inode(struct inode *inode); 1104 extern void ceph_free_inode(struct inode *inode); 1105 1106 struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, 1107 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx); 1108 void ceph_as_ctx_to_req(struct ceph_mds_request *req, 1109 struct ceph_acl_sec_ctx *as_ctx); 1110 1111 extern struct inode *ceph_get_inode(struct super_block *sb, 1112 struct ceph_vino vino, 1113 struct inode *newino); 1114 extern struct inode *ceph_get_snapdir(struct inode *parent); 1115 extern int ceph_fill_file_size(struct inode *inode, int issued, 1116 u32 truncate_seq, u64 truncate_size, u64 size); 1117 extern void ceph_inode_set_subvolume(struct inode *inode, u64 subvolume_id); 1118 extern void ceph_fill_file_time(struct inode *inode, int issued, 1119 u64 time_warp_seq, struct timespec64 *ctime, 1120 struct timespec64 *mtime, 1121 struct timespec64 *atime); 1122 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, 1123 struct ceph_mds_reply_info_in *iinfo, 1124 struct ceph_mds_reply_dirfrag *dirinfo, 1125 struct ceph_mds_session *session, int cap_fmode, 1126 struct ceph_cap_reservation *caps_reservation); 1127 extern int ceph_fill_trace(struct super_block *sb, 1128 struct ceph_mds_request *req); 1129 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1130 struct ceph_mds_session *session); 1131 1132 extern bool ceph_inode_set_size(struct inode *inode, loff_t size); 1133 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 1134 1135 void ceph_queue_inode_work(struct inode *inode, int work_bit); 1136 1137 static inline void ceph_queue_vmtruncate(struct inode *inode) 1138 { 1139 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); 1140 } 1141 1142 static inline void ceph_queue_invalidate(struct inode *inode) 1143 { 1144 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); 1145 } 1146 1147 static inline void ceph_queue_writeback(struct inode *inode) 1148 { 1149 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); 1150 } 1151 1152 static inline void ceph_queue_check_caps(struct inode *inode) 1153 { 1154 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); 1155 } 1156 1157 static inline void ceph_queue_flush_snaps(struct inode *inode) 1158 { 1159 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); 1160 } 1161 1162 extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask); 1163 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 1164 int mask, bool force); 1165 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) 1166 { 1167 return __ceph_do_getattr(inode, NULL, mask, force); 1168 } 1169 extern int ceph_permission(struct mnt_idmap *idmap, 1170 struct inode *inode, int mask); 1171 1172 struct ceph_iattr { 1173 struct ceph_fscrypt_auth *fscrypt_auth; 1174 }; 1175 1176 extern int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, 1177 struct iattr *attr, struct ceph_iattr *cia); 1178 extern int ceph_setattr(struct mnt_idmap *idmap, 1179 struct dentry *dentry, struct iattr *attr); 1180 extern int ceph_getattr(struct mnt_idmap *idmap, 1181 const struct path *path, struct kstat *stat, 1182 u32 request_mask, unsigned int flags); 1183 void ceph_inode_shutdown(struct inode *inode); 1184 1185 static inline bool ceph_inode_is_shutdown(struct inode *inode) 1186 { 1187 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags); 1188 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 1189 int state = READ_ONCE(fsc->mount_state); 1190 1191 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN; 1192 } 1193 1194 /* xattr.c */ 1195 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); 1196 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size); 1197 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 1198 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 1199 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); 1200 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 1201 extern const struct xattr_handler * const ceph_xattr_handlers[]; 1202 1203 struct ceph_acl_sec_ctx { 1204 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1205 void *default_acl; 1206 void *acl; 1207 #endif 1208 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1209 struct lsm_context lsmctx; 1210 #endif 1211 #ifdef CONFIG_FS_ENCRYPTION 1212 struct ceph_fscrypt_auth *fscrypt_auth; 1213 #endif 1214 struct ceph_pagelist *pagelist; 1215 }; 1216 1217 #ifdef CONFIG_SECURITY 1218 extern bool ceph_security_xattr_deadlock(struct inode *in); 1219 extern bool ceph_security_xattr_wanted(struct inode *in); 1220 #else 1221 static inline bool ceph_security_xattr_deadlock(struct inode *in) 1222 { 1223 return false; 1224 } 1225 static inline bool ceph_security_xattr_wanted(struct inode *in) 1226 { 1227 return false; 1228 } 1229 #endif 1230 1231 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL 1232 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1233 struct ceph_acl_sec_ctx *ctx); 1234 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1235 { 1236 security_inode_invalidate_secctx(inode); 1237 } 1238 #else 1239 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, 1240 struct ceph_acl_sec_ctx *ctx) 1241 { 1242 return 0; 1243 } 1244 static inline void ceph_security_invalidate_secctx(struct inode *inode) 1245 { 1246 } 1247 #endif 1248 1249 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); 1250 1251 /* acl.c */ 1252 #ifdef CONFIG_CEPH_FS_POSIX_ACL 1253 1254 struct posix_acl *ceph_get_acl(struct inode *, int, bool); 1255 int ceph_set_acl(struct mnt_idmap *idmap, 1256 struct dentry *dentry, struct posix_acl *acl, int type); 1257 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1258 struct ceph_acl_sec_ctx *as_ctx); 1259 void ceph_init_inode_acls(struct inode *inode, 1260 struct ceph_acl_sec_ctx *as_ctx); 1261 1262 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1263 { 1264 forget_all_cached_acls(inode); 1265 } 1266 1267 #else 1268 1269 #define ceph_get_acl NULL 1270 #define ceph_set_acl NULL 1271 1272 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 1273 struct ceph_acl_sec_ctx *as_ctx) 1274 { 1275 return 0; 1276 } 1277 static inline void ceph_init_inode_acls(struct inode *inode, 1278 struct ceph_acl_sec_ctx *as_ctx) 1279 { 1280 } 1281 1282 static inline void ceph_forget_all_cached_acls(struct inode *inode) 1283 { 1284 } 1285 1286 #endif 1287 1288 /* caps.c */ 1289 extern const char *ceph_cap_string(int c); 1290 extern void ceph_handle_caps(struct ceph_mds_session *session, 1291 struct ceph_msg *msg); 1292 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 1293 struct ceph_cap_reservation *ctx); 1294 extern void ceph_add_cap(struct inode *inode, 1295 struct ceph_mds_session *session, u64 cap_id, 1296 unsigned issued, unsigned wanted, 1297 unsigned cap, unsigned seq, u64 realmino, int flags, 1298 struct ceph_cap **new_cap); 1299 1300 /** 1301 * Determine whether __ceph_remove_cap() has been called on this #cap 1302 * (but the object has not yet been freed because it is protected by 1303 * `ceph_mds_session.s_cap_iterator`). 1304 * 1305 * Caller must lock either `ceph_inode_info.i_ceph_lock` or 1306 * `ceph_mds_session.s_cap_lock`. 1307 */ 1308 static inline bool ceph_cap_is_removed(const struct ceph_cap *cap) 1309 { 1310 return RB_EMPTY_NODE(&cap->ci_node); 1311 } 1312 1313 extern void ceph_remove_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, 1314 struct ceph_inode_info *ci, 1315 bool queue_release); 1316 extern void __ceph_remove_caps(struct ceph_inode_info *ci); 1317 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 1318 struct ceph_cap *cap); 1319 extern int ceph_is_any_caps(struct inode *inode); 1320 1321 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 1322 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 1323 int datasync); 1324 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, 1325 struct ceph_mds_session *session); 1326 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 1327 struct ceph_mds_session *session); 1328 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, 1329 struct ceph_inode_info *ci); 1330 extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, 1331 int mds); 1332 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 1333 int mds); 1334 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, 1335 bool snap_rwsem_locked); 1336 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 1337 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 1338 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); 1339 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 1340 struct ceph_snap_context *snapc); 1341 extern void __ceph_remove_capsnap(struct inode *inode, 1342 struct ceph_cap_snap *capsnap, 1343 bool *wake_ci, bool *wake_mdsc); 1344 extern void ceph_remove_capsnap(struct inode *inode, 1345 struct ceph_cap_snap *capsnap, 1346 bool *wake_ci, bool *wake_mdsc); 1347 extern void ceph_flush_snaps(struct ceph_inode_info *ci, 1348 struct ceph_mds_session **psession); 1349 extern bool __ceph_should_report_size(struct ceph_inode_info *ci); 1350 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags); 1351 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 1352 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 1353 extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc); 1354 extern int ceph_drop_caps_for_unlink(struct inode *inode); 1355 extern int ceph_encode_inode_release(void **p, struct inode *inode, 1356 int mds, int drop, int unless, int force); 1357 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 1358 struct inode *dir, 1359 int mds, int drop, int unless); 1360 1361 extern int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, 1362 int need, int want, loff_t endoff, int *got); 1363 extern int ceph_get_caps(struct file *filp, int need, int want, 1364 loff_t endoff, int *got); 1365 extern int ceph_try_get_caps(struct inode *inode, 1366 int need, int want, bool nonblock, int *got); 1367 1368 /* for counting open files by mode */ 1369 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); 1370 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); 1371 extern void __ceph_touch_fmode(struct ceph_inode_info *ci, 1372 struct ceph_mds_client *mdsc, int fmode); 1373 1374 /* addr.c */ 1375 extern const struct address_space_operations ceph_aops; 1376 extern const struct netfs_request_ops ceph_netfs_ops; 1377 int ceph_mmap_prepare(struct vm_area_desc *desc); 1378 extern int ceph_uninline_data(struct file *file); 1379 extern int ceph_pool_perm_check(struct inode *inode, int need); 1380 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); 1381 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); 1382 1383 static inline bool ceph_has_inline_data(struct ceph_inode_info *ci) 1384 { 1385 if (ci->i_inline_version == CEPH_INLINE_NONE || 1386 ci->i_inline_version == 1) /* initial version, no data */ 1387 return false; 1388 return true; 1389 } 1390 1391 /* file.c */ 1392 extern const struct file_operations ceph_file_fops; 1393 1394 extern int ceph_renew_caps(struct inode *inode, int fmode); 1395 extern int ceph_open(struct inode *inode, struct file *file); 1396 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 1397 struct file *file, unsigned flags, umode_t mode); 1398 extern ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos, 1399 struct iov_iter *to, int *retry_op, 1400 u64 *last_objver); 1401 extern int ceph_release(struct inode *inode, struct file *filp); 1402 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, 1403 char *data, size_t len); 1404 1405 /* dir.c */ 1406 extern const struct file_operations ceph_dir_fops; 1407 extern const struct file_operations ceph_snapdir_fops; 1408 extern const struct inode_operations ceph_dir_iops; 1409 extern const struct inode_operations ceph_snapdir_iops; 1410 extern const struct dentry_operations ceph_dentry_ops; 1411 1412 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); 1413 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 1414 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req, 1415 struct dentry *dentry); 1416 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 1417 struct dentry *dentry, int err); 1418 1419 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); 1420 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); 1421 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 1422 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); 1423 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 1424 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); 1425 1426 /* ioctl.c */ 1427 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1428 1429 /* export.c */ 1430 extern const struct export_operations ceph_export_ops; 1431 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); 1432 1433 /* locks.c */ 1434 extern __init void ceph_flock_init(void); 1435 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 1436 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 1437 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 1438 extern int ceph_encode_locks_to_buffer(struct inode *inode, 1439 struct ceph_filelock *flocks, 1440 int num_fcntl_locks, 1441 int num_flock_locks); 1442 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 1443 struct ceph_pagelist *pagelist, 1444 int num_fcntl_locks, int num_flock_locks); 1445 1446 /* debugfs.c */ 1447 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); 1448 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 1449 1450 /* quota.c */ 1451 1452 enum quota_get_realm { 1453 QUOTA_GET_MAX_FILES, 1454 QUOTA_GET_MAX_BYTES, 1455 QUOTA_GET_ANY 1456 }; 1457 1458 static inline bool __ceph_has_quota(struct ceph_inode_info *ci, 1459 enum quota_get_realm which) 1460 { 1461 bool has_quota = false; 1462 1463 switch (which) { 1464 case QUOTA_GET_MAX_BYTES: 1465 has_quota = !!ci->i_max_bytes; 1466 break; 1467 case QUOTA_GET_MAX_FILES: 1468 has_quota = !!ci->i_max_files; 1469 break; 1470 default: 1471 has_quota = !!(ci->i_max_files || ci->i_max_bytes); 1472 } 1473 return has_quota; 1474 } 1475 1476 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); 1477 1478 static inline void __ceph_update_quota(struct ceph_inode_info *ci, 1479 u64 max_bytes, u64 max_files) 1480 { 1481 bool had_quota, has_quota; 1482 had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1483 ci->i_max_bytes = max_bytes; 1484 ci->i_max_files = max_files; 1485 has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY); 1486 1487 if (had_quota != has_quota) 1488 ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota); 1489 } 1490 1491 static inline int __ceph_sparse_read_ext_count(struct inode *inode, u64 len) 1492 { 1493 int cnt = 0; 1494 1495 if (IS_ENCRYPTED(inode)) { 1496 cnt = len >> CEPH_FSCRYPT_BLOCK_SHIFT; 1497 if (cnt > CEPH_SPARSE_EXT_ARRAY_INITIAL) 1498 cnt = 0; 1499 } 1500 1501 return cnt; 1502 } 1503 1504 extern void ceph_handle_quota(struct ceph_mds_client *mdsc, 1505 struct ceph_mds_session *session, 1506 struct ceph_msg *msg); 1507 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); 1508 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); 1509 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, 1510 loff_t newlen); 1511 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, 1512 loff_t newlen); 1513 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, 1514 struct kstatfs *buf); 1515 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); 1516 1517 bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc, 1518 struct ceph_mds_session *session); 1519 void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc); 1520 bool ceph_inc_osd_stopping_blocker(struct ceph_mds_client *mdsc); 1521 void ceph_dec_osd_stopping_blocker(struct ceph_mds_client *mdsc); 1522 #endif /* _FS_CEPH_SUPER_H */ 1523