1 #ifndef _FS_CEPH_SUPER_H 2 #define _FS_CEPH_SUPER_H 3 4 #include <linux/ceph/ceph_debug.h> 5 6 #include <asm/unaligned.h> 7 #include <linux/backing-dev.h> 8 #include <linux/completion.h> 9 #include <linux/exportfs.h> 10 #include <linux/fs.h> 11 #include <linux/mempool.h> 12 #include <linux/pagemap.h> 13 #include <linux/wait.h> 14 #include <linux/writeback.h> 15 #include <linux/slab.h> 16 #include <linux/posix_acl.h> 17 18 #include <linux/ceph/libceph.h> 19 20 #ifdef CONFIG_CEPH_FSCACHE 21 #include <linux/fscache.h> 22 #endif 23 24 /* f_type in struct statfs */ 25 #define CEPH_SUPER_MAGIC 0x00c36400 26 27 /* large granularity for statfs utilization stats to facilitate 28 * large volume sizes on 32-bit machines. */ 29 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ 30 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 31 32 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 33 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 34 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 35 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 36 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */ 37 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ 38 39 #define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES) 40 41 #define ceph_set_mount_opt(fsc, opt) \ 42 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt; 43 #define ceph_test_mount_opt(fsc, opt) \ 44 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 45 46 #define CEPH_RSIZE_DEFAULT 0 /* max read size */ 47 #define CEPH_RASIZE_DEFAULT (8192*1024) /* readahead */ 48 #define CEPH_MAX_READDIR_DEFAULT 1024 49 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 50 #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 51 52 struct ceph_mount_options { 53 int flags; 54 int sb_flags; 55 56 int wsize; /* max write size */ 57 int rsize; /* max read size */ 58 int rasize; /* max readahead */ 59 int congestion_kb; /* max writeback in flight */ 60 int caps_wanted_delay_min, caps_wanted_delay_max; 61 int cap_release_safety; 62 int max_readdir; /* max readdir result (entires) */ 63 int max_readdir_bytes; /* max readdir result (bytes) */ 64 65 /* 66 * everything above this point can be memcmp'd; everything below 67 * is handled in compare_mount_options() 68 */ 69 70 char *snapdir_name; /* default ".snap" */ 71 }; 72 73 struct ceph_fs_client { 74 struct super_block *sb; 75 76 struct ceph_mount_options *mount_options; 77 struct ceph_client *client; 78 79 unsigned long mount_state; 80 int min_caps; /* min caps i added */ 81 82 struct ceph_mds_client *mdsc; 83 84 /* writeback */ 85 mempool_t *wb_pagevec_pool; 86 struct workqueue_struct *wb_wq; 87 struct workqueue_struct *pg_inv_wq; 88 struct workqueue_struct *trunc_wq; 89 atomic_long_t writeback_count; 90 91 struct backing_dev_info backing_dev_info; 92 93 #ifdef CONFIG_DEBUG_FS 94 struct dentry *debugfs_dentry_lru, *debugfs_caps; 95 struct dentry *debugfs_congestion_kb; 96 struct dentry *debugfs_bdi; 97 struct dentry *debugfs_mdsc, *debugfs_mdsmap; 98 struct dentry *debugfs_mds_sessions; 99 #endif 100 101 #ifdef CONFIG_CEPH_FSCACHE 102 struct fscache_cookie *fscache; 103 struct workqueue_struct *revalidate_wq; 104 #endif 105 }; 106 107 108 /* 109 * File i/o capability. This tracks shared state with the metadata 110 * server that allows us to cache or writeback attributes or to read 111 * and write data. For any given inode, we should have one or more 112 * capabilities, one issued by each metadata server, and our 113 * cumulative access is the OR of all issued capabilities. 114 * 115 * Each cap is referenced by the inode's i_caps rbtree and by per-mds 116 * session capability lists. 117 */ 118 struct ceph_cap { 119 struct ceph_inode_info *ci; 120 struct rb_node ci_node; /* per-ci cap tree */ 121 struct ceph_mds_session *session; 122 struct list_head session_caps; /* per-session caplist */ 123 int mds; 124 u64 cap_id; /* unique cap id (mds provided) */ 125 int issued; /* latest, from the mds */ 126 int implemented; /* implemented superset of issued (for revocation) */ 127 int mds_wanted; 128 u32 seq, issue_seq, mseq; 129 u32 cap_gen; /* active/stale cycle */ 130 unsigned long last_used; 131 struct list_head caps_item; 132 }; 133 134 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */ 135 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */ 136 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */ 137 138 /* 139 * Snapped cap state that is pending flush to mds. When a snapshot occurs, 140 * we first complete any in-process sync writes and writeback any dirty 141 * data before flushing the snapped state (tracked here) back to the MDS. 142 */ 143 struct ceph_cap_snap { 144 atomic_t nref; 145 struct ceph_inode_info *ci; 146 struct list_head ci_item, flushing_item; 147 148 u64 follows, flush_tid; 149 int issued, dirty; 150 struct ceph_snap_context *context; 151 152 umode_t mode; 153 kuid_t uid; 154 kgid_t gid; 155 156 struct ceph_buffer *xattr_blob; 157 u64 xattr_version; 158 159 u64 size; 160 struct timespec mtime, atime, ctime; 161 u64 time_warp_seq; 162 int writing; /* a sync write is still in progress */ 163 int dirty_pages; /* dirty pages awaiting writeback */ 164 }; 165 166 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 167 { 168 if (atomic_dec_and_test(&capsnap->nref)) { 169 if (capsnap->xattr_blob) 170 ceph_buffer_put(capsnap->xattr_blob); 171 kfree(capsnap); 172 } 173 } 174 175 /* 176 * The frag tree describes how a directory is fragmented, potentially across 177 * multiple metadata servers. It is also used to indicate points where 178 * metadata authority is delegated, and whether/where metadata is replicated. 179 * 180 * A _leaf_ frag will be present in the i_fragtree IFF there is 181 * delegation info. That is, if mds >= 0 || ndist > 0. 182 */ 183 #define CEPH_MAX_DIRFRAG_REP 4 184 185 struct ceph_inode_frag { 186 struct rb_node node; 187 188 /* fragtree state */ 189 u32 frag; 190 int split_by; /* i.e. 2^(split_by) children */ 191 192 /* delegation and replication info */ 193 int mds; /* -1 if same authority as parent */ 194 int ndist; /* >0 if replicated */ 195 int dist[CEPH_MAX_DIRFRAG_REP]; 196 }; 197 198 /* 199 * We cache inode xattrs as an encoded blob until they are first used, 200 * at which point we parse them into an rbtree. 201 */ 202 struct ceph_inode_xattr { 203 struct rb_node node; 204 205 const char *name; 206 int name_len; 207 const char *val; 208 int val_len; 209 int dirty; 210 211 int should_free_name; 212 int should_free_val; 213 }; 214 215 /* 216 * Ceph dentry state 217 */ 218 struct ceph_dentry_info { 219 struct ceph_mds_session *lease_session; 220 u32 lease_gen, lease_shared_gen; 221 u32 lease_seq; 222 unsigned long lease_renew_after, lease_renew_from; 223 struct list_head lru; 224 struct dentry *dentry; 225 u64 time; 226 u64 offset; 227 }; 228 229 struct ceph_inode_xattrs_info { 230 /* 231 * (still encoded) xattr blob. we avoid the overhead of parsing 232 * this until someone actually calls getxattr, etc. 233 * 234 * blob->vec.iov_len == 4 implies there are no xattrs; blob == 235 * NULL means we don't know. 236 */ 237 struct ceph_buffer *blob, *prealloc_blob; 238 239 struct rb_root index; 240 bool dirty; 241 int count; 242 int names_size; 243 int vals_size; 244 u64 version, index_version; 245 }; 246 247 /* 248 * Ceph inode. 249 */ 250 struct ceph_inode_info { 251 struct ceph_vino i_vino; /* ceph ino + snap */ 252 253 spinlock_t i_ceph_lock; 254 255 u64 i_version; 256 u32 i_time_warp_seq; 257 258 unsigned i_ceph_flags; 259 atomic_t i_release_count; 260 atomic_t i_complete_count; 261 262 struct ceph_dir_layout i_dir_layout; 263 struct ceph_file_layout i_layout; 264 char *i_symlink; 265 266 /* for dirs */ 267 struct timespec i_rctime; 268 u64 i_rbytes, i_rfiles, i_rsubdirs; 269 u64 i_files, i_subdirs; 270 271 struct rb_root i_fragtree; 272 struct mutex i_fragtree_mutex; 273 274 struct ceph_inode_xattrs_info i_xattrs; 275 276 /* capabilities. protected _both_ by i_ceph_lock and cap->session's 277 * s_mutex. */ 278 struct rb_root i_caps; /* cap list */ 279 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 280 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 281 struct list_head i_dirty_item, i_flushing_item; 282 u64 i_cap_flush_seq; 283 /* we need to track cap writeback on a per-cap-bit basis, to allow 284 * overlapping, pipelined cap flushes to the mds. we can probably 285 * reduce the tid to 8 bits if we're concerned about inode size. */ 286 u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS]; 287 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 288 unsigned long i_hold_caps_min; /* jiffies */ 289 unsigned long i_hold_caps_max; /* jiffies */ 290 struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 291 struct ceph_cap_reservation i_cap_migration_resv; 292 struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 293 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 294 dirty|flushing caps */ 295 unsigned i_snap_caps; /* cap bits for snapped files */ 296 297 int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */ 298 299 struct mutex i_truncate_mutex; 300 u32 i_truncate_seq; /* last truncate to smaller size */ 301 u64 i_truncate_size; /* and the size we last truncated down to */ 302 int i_truncate_pending; /* still need to call vmtruncate */ 303 304 u64 i_max_size; /* max file size authorized by mds */ 305 u64 i_reported_size; /* (max_)size reported to or requested of mds */ 306 u64 i_wanted_max_size; /* offset we'd like to write too */ 307 u64 i_requested_max_size; /* max_size we've requested */ 308 309 /* held references to caps */ 310 int i_pin_ref; 311 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref; 312 int i_wrbuffer_ref, i_wrbuffer_ref_head; 313 u32 i_shared_gen; /* increment each time we get FILE_SHARED */ 314 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 315 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 316 317 struct list_head i_unsafe_writes; /* uncommitted sync writes */ 318 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 319 spinlock_t i_unsafe_lock; 320 321 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 322 int i_snap_realm_counter; /* snap realm (if caps) */ 323 struct list_head i_snap_realm_item; 324 struct list_head i_snap_flush_item; 325 326 struct work_struct i_wb_work; /* writeback work */ 327 struct work_struct i_pg_inv_work; /* page invalidation work */ 328 329 struct work_struct i_vmtruncate_work; 330 331 #ifdef CONFIG_CEPH_FSCACHE 332 struct fscache_cookie *fscache; 333 u32 i_fscache_gen; /* sequence, for delayed fscache validate */ 334 struct work_struct i_revalidate_work; 335 #endif 336 struct inode vfs_inode; /* at end */ 337 }; 338 339 static inline struct ceph_inode_info *ceph_inode(struct inode *inode) 340 { 341 return container_of(inode, struct ceph_inode_info, vfs_inode); 342 } 343 344 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode) 345 { 346 return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 347 } 348 349 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb) 350 { 351 return (struct ceph_fs_client *)sb->s_fs_info; 352 } 353 354 static inline struct ceph_vino ceph_vino(struct inode *inode) 355 { 356 return ceph_inode(inode)->i_vino; 357 } 358 359 /* 360 * ino_t is <64 bits on many architectures, blech. 361 * 362 * i_ino (kernel inode) st_ino (userspace) 363 * i386 32 32 364 * x86_64+ino32 64 32 365 * x86_64 64 64 366 */ 367 static inline u32 ceph_ino_to_ino32(__u64 vino) 368 { 369 u32 ino = vino & 0xffffffff; 370 ino ^= vino >> 32; 371 if (!ino) 372 ino = 2; 373 return ino; 374 } 375 376 /* 377 * kernel i_ino value 378 */ 379 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino) 380 { 381 #if BITS_PER_LONG == 32 382 return ceph_ino_to_ino32(vino.ino); 383 #else 384 return (ino_t)vino.ino; 385 #endif 386 } 387 388 /* 389 * user-visible ino (stat, filldir) 390 */ 391 #if BITS_PER_LONG == 32 392 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino) 393 { 394 return ino; 395 } 396 #else 397 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino) 398 { 399 if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)) 400 ino = ceph_ino_to_ino32(ino); 401 return ino; 402 } 403 #endif 404 405 406 /* for printf-style formatting */ 407 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 408 409 static inline u64 ceph_ino(struct inode *inode) 410 { 411 return ceph_inode(inode)->i_vino.ino; 412 } 413 static inline u64 ceph_snap(struct inode *inode) 414 { 415 return ceph_inode(inode)->i_vino.snap; 416 } 417 418 static inline int ceph_ino_compare(struct inode *inode, void *data) 419 { 420 struct ceph_vino *pvino = (struct ceph_vino *)data; 421 struct ceph_inode_info *ci = ceph_inode(inode); 422 return ci->i_vino.ino == pvino->ino && 423 ci->i_vino.snap == pvino->snap; 424 } 425 426 static inline struct inode *ceph_find_inode(struct super_block *sb, 427 struct ceph_vino vino) 428 { 429 ino_t t = ceph_vino_to_ino(vino); 430 return ilookup5(sb, t, ceph_ino_compare, &vino); 431 } 432 433 434 /* 435 * Ceph inode. 436 */ 437 #define CEPH_I_NODELAY 4 /* do not delay cap release */ 438 #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */ 439 #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */ 440 441 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, 442 int release_count) 443 { 444 atomic_set(&ci->i_complete_count, release_count); 445 } 446 447 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) 448 { 449 atomic_inc(&ci->i_release_count); 450 } 451 452 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) 453 { 454 return atomic_read(&ci->i_complete_count) == 455 atomic_read(&ci->i_release_count); 456 } 457 458 static inline void ceph_dir_clear_complete(struct inode *inode) 459 { 460 __ceph_dir_clear_complete(ceph_inode(inode)); 461 } 462 463 static inline bool ceph_dir_is_complete(struct inode *inode) 464 { 465 return __ceph_dir_is_complete(ceph_inode(inode)); 466 } 467 468 469 /* find a specific frag @f */ 470 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 471 u32 f); 472 473 /* 474 * choose fragment for value @v. copy frag content to pfrag, if leaf 475 * exists 476 */ 477 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 478 struct ceph_inode_frag *pfrag, 479 int *found); 480 481 static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry) 482 { 483 return (struct ceph_dentry_info *)dentry->d_fsdata; 484 } 485 486 static inline loff_t ceph_make_fpos(unsigned frag, unsigned off) 487 { 488 return ((loff_t)frag << 32) | (loff_t)off; 489 } 490 491 /* 492 * caps helpers 493 */ 494 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 495 { 496 return !RB_EMPTY_ROOT(&ci->i_caps); 497 } 498 499 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 500 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 501 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 502 struct ceph_cap *cap); 503 504 static inline int ceph_caps_issued(struct ceph_inode_info *ci) 505 { 506 int issued; 507 spin_lock(&ci->i_ceph_lock); 508 issued = __ceph_caps_issued(ci, NULL); 509 spin_unlock(&ci->i_ceph_lock); 510 return issued; 511 } 512 513 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, 514 int touch) 515 { 516 int r; 517 spin_lock(&ci->i_ceph_lock); 518 r = __ceph_caps_issued_mask(ci, mask, touch); 519 spin_unlock(&ci->i_ceph_lock); 520 return r; 521 } 522 523 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 524 { 525 return ci->i_dirty_caps | ci->i_flushing_caps; 526 } 527 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask); 528 529 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, 530 struct ceph_cap *ocap, int mask); 531 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 532 extern int __ceph_caps_used(struct ceph_inode_info *ci); 533 534 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 535 536 /* 537 * wanted, by virtue of open file modes AND cap refs (buffered/cached data) 538 */ 539 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci) 540 { 541 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci); 542 if (w & CEPH_CAP_FILE_BUFFER) 543 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */ 544 return w; 545 } 546 547 /* what the mds thinks we want */ 548 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci); 549 550 extern void ceph_caps_init(struct ceph_mds_client *mdsc); 551 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 552 extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta); 553 extern void ceph_reserve_caps(struct ceph_mds_client *mdsc, 554 struct ceph_cap_reservation *ctx, int need); 555 extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc, 556 struct ceph_cap_reservation *ctx); 557 extern void ceph_reservation_status(struct ceph_fs_client *client, 558 int *total, int *avail, int *used, 559 int *reserved, int *min); 560 561 562 563 /* 564 * we keep buffered readdir results attached to file->private_data 565 */ 566 #define CEPH_F_SYNC 1 567 #define CEPH_F_ATEND 2 568 569 struct ceph_file_info { 570 short fmode; /* initialized on open */ 571 short flags; /* CEPH_F_* */ 572 573 /* readdir: position within the dir */ 574 u32 frag; 575 struct ceph_mds_request *last_readdir; 576 577 /* readdir: position within a frag */ 578 unsigned offset; /* offset of last chunk, adjusted for . and .. */ 579 unsigned next_offset; /* offset of next chunk (last_name's + 1) */ 580 char *last_name; /* last entry in previous chunk */ 581 struct dentry *dentry; /* next dentry (for dcache readdir) */ 582 int dir_release_count; 583 584 /* used for -o dirstat read() on directory thing */ 585 char *dir_info; 586 int dir_info_len; 587 }; 588 589 590 591 /* 592 * A "snap realm" describes a subset of the file hierarchy sharing 593 * the same set of snapshots that apply to it. The realms themselves 594 * are organized into a hierarchy, such that children inherit (some of) 595 * the snapshots of their parents. 596 * 597 * All inodes within the realm that have capabilities are linked into a 598 * per-realm list. 599 */ 600 struct ceph_snap_realm { 601 u64 ino; 602 atomic_t nref; 603 struct rb_node node; 604 605 u64 created, seq; 606 u64 parent_ino; 607 u64 parent_since; /* snapid when our current parent became so */ 608 609 u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 610 u32 num_prior_parent_snaps; /* had prior to parent_since */ 611 u64 *snaps; /* snaps specific to this realm */ 612 u32 num_snaps; 613 614 struct ceph_snap_realm *parent; 615 struct list_head children; /* list of child realms */ 616 struct list_head child_item; 617 618 struct list_head empty_item; /* if i have ref==0 */ 619 620 struct list_head dirty_item; /* if realm needs new context */ 621 622 /* the current set of snaps for this realm */ 623 struct ceph_snap_context *cached_context; 624 625 struct list_head inodes_with_caps; 626 spinlock_t inodes_with_caps_lock; 627 }; 628 629 static inline int default_congestion_kb(void) 630 { 631 int congestion_kb; 632 633 /* 634 * Copied from NFS 635 * 636 * congestion size, scale with available memory. 637 * 638 * 64MB: 8192k 639 * 128MB: 11585k 640 * 256MB: 16384k 641 * 512MB: 23170k 642 * 1GB: 32768k 643 * 2GB: 46340k 644 * 4GB: 65536k 645 * 8GB: 92681k 646 * 16GB: 131072k 647 * 648 * This allows larger machines to have larger/more transfers. 649 * Limit the default to 256M 650 */ 651 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); 652 if (congestion_kb > 256*1024) 653 congestion_kb = 256*1024; 654 655 return congestion_kb; 656 } 657 658 659 660 /* snap.c */ 661 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 662 u64 ino); 663 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 664 struct ceph_snap_realm *realm); 665 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 666 struct ceph_snap_realm *realm); 667 extern int ceph_update_snap_trace(struct ceph_mds_client *m, 668 void *p, void *e, bool deletion); 669 extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 670 struct ceph_mds_session *session, 671 struct ceph_msg *msg); 672 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci); 673 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 674 struct ceph_cap_snap *capsnap); 675 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); 676 677 /* 678 * a cap_snap is "pending" if it is still awaiting an in-progress 679 * sync write (that may/may not still update size, mtime, etc.). 680 */ 681 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 682 { 683 return !list_empty(&ci->i_cap_snaps) && 684 list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap, 685 ci_item)->writing; 686 } 687 688 /* inode.c */ 689 extern const struct inode_operations ceph_file_iops; 690 691 extern struct inode *ceph_alloc_inode(struct super_block *sb); 692 extern void ceph_destroy_inode(struct inode *inode); 693 extern int ceph_drop_inode(struct inode *inode); 694 695 extern struct inode *ceph_get_inode(struct super_block *sb, 696 struct ceph_vino vino); 697 extern struct inode *ceph_get_snapdir(struct inode *parent); 698 extern int ceph_fill_file_size(struct inode *inode, int issued, 699 u32 truncate_seq, u64 truncate_size, u64 size); 700 extern void ceph_fill_file_time(struct inode *inode, int issued, 701 u64 time_warp_seq, struct timespec *ctime, 702 struct timespec *mtime, struct timespec *atime); 703 extern int ceph_fill_trace(struct super_block *sb, 704 struct ceph_mds_request *req, 705 struct ceph_mds_session *session); 706 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 707 struct ceph_mds_session *session); 708 709 extern int ceph_inode_holds_cap(struct inode *inode, int mask); 710 711 extern int ceph_inode_set_size(struct inode *inode, loff_t size); 712 extern void __ceph_do_pending_vmtruncate(struct inode *inode); 713 extern void ceph_queue_vmtruncate(struct inode *inode); 714 715 extern void ceph_queue_invalidate(struct inode *inode); 716 extern void ceph_queue_writeback(struct inode *inode); 717 718 extern int ceph_do_getattr(struct inode *inode, int mask, bool force); 719 extern int ceph_permission(struct inode *inode, int mask); 720 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); 721 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, 722 struct kstat *stat); 723 724 /* xattr.c */ 725 extern int ceph_setxattr(struct dentry *, const char *, const void *, 726 size_t, int); 727 int __ceph_setxattr(struct dentry *, const char *, const void *, size_t, int); 728 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); 729 int __ceph_removexattr(struct dentry *, const char *); 730 extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t); 731 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 732 extern int ceph_removexattr(struct dentry *, const char *); 733 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci); 734 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 735 extern void __init ceph_xattr_init(void); 736 extern void ceph_xattr_exit(void); 737 extern const struct xattr_handler *ceph_xattr_handlers[]; 738 739 /* acl.c */ 740 struct ceph_acls_info { 741 void *default_acl; 742 void *acl; 743 struct ceph_pagelist *pagelist; 744 }; 745 746 #ifdef CONFIG_CEPH_FS_POSIX_ACL 747 748 struct posix_acl *ceph_get_acl(struct inode *, int); 749 int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type); 750 int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 751 struct ceph_acls_info *info); 752 void ceph_init_inode_acls(struct inode *inode, struct ceph_acls_info *info); 753 void ceph_release_acls_info(struct ceph_acls_info *info); 754 755 static inline void ceph_forget_all_cached_acls(struct inode *inode) 756 { 757 forget_all_cached_acls(inode); 758 } 759 760 #else 761 762 #define ceph_get_acl NULL 763 #define ceph_set_acl NULL 764 765 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, 766 struct ceph_acls_info *info) 767 { 768 return 0; 769 } 770 static inline void ceph_init_inode_acls(struct inode *inode, 771 struct ceph_acls_info *info) 772 { 773 } 774 static inline void ceph_release_acls_info(struct ceph_acls_info *info) 775 { 776 } 777 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) 778 { 779 return 0; 780 } 781 782 static inline void ceph_forget_all_cached_acls(struct inode *inode) 783 { 784 } 785 786 #endif 787 788 /* caps.c */ 789 extern const char *ceph_cap_string(int c); 790 extern void ceph_handle_caps(struct ceph_mds_session *session, 791 struct ceph_msg *msg); 792 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, 793 struct ceph_cap_reservation *ctx); 794 extern void ceph_add_cap(struct inode *inode, 795 struct ceph_mds_session *session, u64 cap_id, 796 int fmode, unsigned issued, unsigned wanted, 797 unsigned cap, unsigned seq, u64 realmino, int flags, 798 struct ceph_cap **new_cap); 799 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); 800 extern void ceph_put_cap(struct ceph_mds_client *mdsc, 801 struct ceph_cap *cap); 802 extern int ceph_is_any_caps(struct inode *inode); 803 804 extern void __queue_cap_release(struct ceph_mds_session *session, u64 ino, 805 u64 cap_id, u32 migrate_seq, u32 issue_seq); 806 extern void ceph_queue_caps_release(struct inode *inode); 807 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 808 extern int ceph_fsync(struct file *file, loff_t start, loff_t end, 809 int datasync); 810 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 811 struct ceph_mds_session *session); 812 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 813 int mds); 814 extern int ceph_get_cap_mds(struct inode *inode); 815 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 816 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 817 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 818 struct ceph_snap_context *snapc); 819 extern void __ceph_flush_snaps(struct ceph_inode_info *ci, 820 struct ceph_mds_session **psession, 821 int again); 822 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 823 struct ceph_mds_session *session); 824 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 825 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 826 827 extern int ceph_encode_inode_release(void **p, struct inode *inode, 828 int mds, int drop, int unless, int force); 829 extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 830 int mds, int drop, int unless); 831 832 extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, 833 int *got, loff_t endoff); 834 835 /* for counting open files by mode */ 836 static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode) 837 { 838 ci->i_nr_by_mode[mode]++; 839 } 840 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode); 841 842 /* addr.c */ 843 extern const struct address_space_operations ceph_aops; 844 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 845 846 /* file.c */ 847 extern const struct file_operations ceph_file_fops; 848 extern const struct address_space_operations ceph_aops; 849 850 extern int ceph_open(struct inode *inode, struct file *file); 851 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 852 struct file *file, unsigned flags, umode_t mode, 853 int *opened); 854 extern int ceph_release(struct inode *inode, struct file *filp); 855 856 /* dir.c */ 857 extern const struct file_operations ceph_dir_fops; 858 extern const struct inode_operations ceph_dir_iops; 859 extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops, 860 ceph_snapdir_dentry_ops; 861 862 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 863 extern int ceph_handle_snapdir(struct ceph_mds_request *req, 864 struct dentry *dentry, int err); 865 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 866 struct dentry *dentry, int err); 867 868 extern void ceph_dentry_lru_add(struct dentry *dn); 869 extern void ceph_dentry_lru_touch(struct dentry *dn); 870 extern void ceph_dentry_lru_del(struct dentry *dn); 871 extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 872 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); 873 extern struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry); 874 875 /* 876 * our d_ops vary depending on whether the inode is live, 877 * snapshotted (read-only), or a virtual ".snap" directory. 878 */ 879 int ceph_init_dentry(struct dentry *dentry); 880 881 882 /* ioctl.c */ 883 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 884 885 /* export.c */ 886 extern const struct export_operations ceph_export_ops; 887 888 /* locks.c */ 889 extern __init void ceph_flock_init(void); 890 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 891 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 892 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 893 extern int ceph_encode_locks_to_buffer(struct inode *inode, 894 struct ceph_filelock *flocks, 895 int num_fcntl_locks, 896 int num_flock_locks); 897 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 898 struct ceph_pagelist *pagelist, 899 int num_fcntl_locks, int num_flock_locks); 900 extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c); 901 902 /* debugfs.c */ 903 extern int ceph_fs_debugfs_init(struct ceph_fs_client *client); 904 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 905 906 #endif /* _FS_CEPH_SUPER_H */ 907