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