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