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