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