1 #ifndef _FS_CEPH_SUPER_H
2 #define _FS_CEPH_SUPER_H
4 #include <linux/ceph/ceph_debug.h>
6 #include <asm/unaligned.h>
7 #include <linux/backing-dev.h>
8 #include <linux/completion.h>
9 #include <linux/exportfs.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 #include <linux/refcount.h>
19 #include <linux/ceph/libceph.h>
21 #ifdef CONFIG_CEPH_FSCACHE
22 #include <linux/fscache.h>
25 /* f_type in struct statfs */
26 #define CEPH_SUPER_MAGIC 0x00c36400
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)
33 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
34 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
35 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
36 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
37 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
38 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
39 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
40 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
42 #define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE
44 #define ceph_set_mount_opt(fsc, opt) \
45 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
46 #define ceph_test_mount_opt(fsc, opt) \
47 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
49 /* max size of osd read request, limited by libceph */
50 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
51 /* osd has a configurable limitaion of max write size.
52 * CEPH_MSG_MAX_DATA_LEN should be small enough. */
53 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
54 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */
55 #define CEPH_MAX_READDIR_DEFAULT 1024
56 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
57 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
60 * Delay telling the MDS we no longer want caps, in case we reopen
61 * the file. Delay a minimum amount of time, even if we send a cap
62 * message for some other reason. Otherwise, take the oppotunity to
63 * update the mds to avoid sending another message later.
65 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
66 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
68 struct ceph_mount_options {
72 int wsize; /* max write size */
73 int rsize; /* max read size */
74 int rasize; /* max readahead */
75 int congestion_kb; /* max writeback in flight */
76 int caps_wanted_delay_min, caps_wanted_delay_max;
77 int max_readdir; /* max readdir result (entires) */
78 int max_readdir_bytes; /* max readdir result (bytes) */
81 * everything above this point can be memcmp'd; everything below
82 * is handled in compare_mount_options()
85 char *snapdir_name; /* default ".snap" */
86 char *mds_namespace; /* default NULL */
87 char *server_path; /* default "/" */
88 char *fscache_uniq; /* default NULL */
91 struct ceph_fs_client {
92 struct super_block *sb;
94 struct ceph_mount_options *mount_options;
95 struct ceph_client *client;
97 unsigned long mount_state;
98 int min_caps; /* min caps i added */
100 struct ceph_mds_client *mdsc;
103 mempool_t *wb_pagevec_pool;
104 struct workqueue_struct *wb_wq;
105 struct workqueue_struct *pg_inv_wq;
106 struct workqueue_struct *trunc_wq;
107 atomic_long_t writeback_count;
109 #ifdef CONFIG_DEBUG_FS
110 struct dentry *debugfs_dentry_lru, *debugfs_caps;
111 struct dentry *debugfs_congestion_kb;
112 struct dentry *debugfs_bdi;
113 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
114 struct dentry *debugfs_mds_sessions;
117 #ifdef CONFIG_CEPH_FSCACHE
118 struct fscache_cookie *fscache;
124 * File i/o capability. This tracks shared state with the metadata
125 * server that allows us to cache or writeback attributes or to read
126 * and write data. For any given inode, we should have one or more
127 * capabilities, one issued by each metadata server, and our
128 * cumulative access is the OR of all issued capabilities.
130 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
131 * session capability lists.
134 struct ceph_inode_info *ci;
135 struct rb_node ci_node; /* per-ci cap tree */
136 struct ceph_mds_session *session;
137 struct list_head session_caps; /* per-session caplist */
138 u64 cap_id; /* unique cap id (mds provided) */
142 int issued; /* latest, from the mds */
143 int implemented; /* implemented superset of
144 issued (for revocation) */
147 /* caps to release */
153 u32 seq, issue_seq, mseq;
154 u32 cap_gen; /* active/stale cycle */
155 unsigned long last_used;
156 struct list_head caps_item;
159 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
160 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
161 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
163 struct ceph_cap_flush {
165 int caps; /* 0 means capsnap */
166 bool wake; /* wake up flush waiters when finish ? */
167 struct list_head g_list; // global
168 struct list_head i_list; // per inode
172 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
173 * we first complete any in-process sync writes and writeback any dirty
174 * data before flushing the snapped state (tracked here) back to the MDS.
176 struct ceph_cap_snap {
178 struct list_head ci_item;
180 struct ceph_cap_flush cap_flush;
184 struct ceph_snap_context *context;
190 struct ceph_buffer *xattr_blob;
194 struct timespec mtime, atime, ctime;
198 int writing; /* a sync write is still in progress */
199 int dirty_pages; /* dirty pages awaiting writeback */
204 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
206 if (refcount_dec_and_test(&capsnap->nref)) {
207 if (capsnap->xattr_blob)
208 ceph_buffer_put(capsnap->xattr_blob);
214 * The frag tree describes how a directory is fragmented, potentially across
215 * multiple metadata servers. It is also used to indicate points where
216 * metadata authority is delegated, and whether/where metadata is replicated.
218 * A _leaf_ frag will be present in the i_fragtree IFF there is
219 * delegation info. That is, if mds >= 0 || ndist > 0.
221 #define CEPH_MAX_DIRFRAG_REP 4
223 struct ceph_inode_frag {
228 int split_by; /* i.e. 2^(split_by) children */
230 /* delegation and replication info */
231 int mds; /* -1 if same authority as parent */
232 int ndist; /* >0 if replicated */
233 int dist[CEPH_MAX_DIRFRAG_REP];
237 * We cache inode xattrs as an encoded blob until they are first used,
238 * at which point we parse them into an rbtree.
240 struct ceph_inode_xattr {
249 int should_free_name;
256 struct ceph_dentry_info {
257 struct ceph_mds_session *lease_session;
258 u32 lease_gen, lease_shared_gen;
260 unsigned long lease_renew_after, lease_renew_from;
261 struct list_head lru;
262 struct dentry *dentry;
267 struct ceph_inode_xattrs_info {
269 * (still encoded) xattr blob. we avoid the overhead of parsing
270 * this until someone actually calls getxattr, etc.
272 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
273 * NULL means we don't know.
275 struct ceph_buffer *blob, *prealloc_blob;
277 struct rb_root index;
282 u64 version, index_version;
288 struct ceph_inode_info {
289 struct ceph_vino i_vino; /* ceph ino + snap */
291 spinlock_t i_ceph_lock;
294 u64 i_inline_version;
297 unsigned i_ceph_flags;
298 atomic64_t i_release_count;
299 atomic64_t i_ordered_count;
300 atomic64_t i_complete_seq[2];
302 struct ceph_dir_layout i_dir_layout;
303 struct ceph_file_layout i_layout;
307 struct timespec i_rctime;
308 u64 i_rbytes, i_rfiles, i_rsubdirs;
309 u64 i_files, i_subdirs;
311 struct rb_root i_fragtree;
312 int i_fragtree_nsplits;
313 struct mutex i_fragtree_mutex;
315 struct ceph_inode_xattrs_info i_xattrs;
317 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
319 struct rb_root i_caps; /* cap list */
320 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
321 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
322 struct list_head i_dirty_item, i_flushing_item;
323 /* we need to track cap writeback on a per-cap-bit basis, to allow
324 * overlapping, pipelined cap flushes to the mds. we can probably
325 * reduce the tid to 8 bits if we're concerned about inode size. */
326 struct ceph_cap_flush *i_prealloc_cap_flush;
327 struct list_head i_cap_flush_list;
328 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
329 unsigned long i_hold_caps_min; /* jiffies */
330 unsigned long i_hold_caps_max; /* jiffies */
331 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
332 struct ceph_cap_reservation i_cap_migration_resv;
333 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
334 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
335 dirty|flushing caps */
336 unsigned i_snap_caps; /* cap bits for snapped files */
338 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
340 struct mutex i_truncate_mutex;
341 u32 i_truncate_seq; /* last truncate to smaller size */
342 u64 i_truncate_size; /* and the size we last truncated down to */
343 int i_truncate_pending; /* still need to call vmtruncate */
345 u64 i_max_size; /* max file size authorized by mds */
346 u64 i_reported_size; /* (max_)size reported to or requested of mds */
347 u64 i_wanted_max_size; /* offset we'd like to write too */
348 u64 i_requested_max_size; /* max_size we've requested */
350 /* held references to caps */
352 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
353 int i_wrbuffer_ref, i_wrbuffer_ref_head;
354 u32 i_shared_gen; /* increment each time we get FILE_SHARED */
355 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
356 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
358 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
359 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
360 spinlock_t i_unsafe_lock;
362 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
363 int i_snap_realm_counter; /* snap realm (if caps) */
364 struct list_head i_snap_realm_item;
365 struct list_head i_snap_flush_item;
367 struct work_struct i_wb_work; /* writeback work */
368 struct work_struct i_pg_inv_work; /* page invalidation work */
370 struct work_struct i_vmtruncate_work;
372 #ifdef CONFIG_CEPH_FSCACHE
373 struct fscache_cookie *fscache;
376 struct inode vfs_inode; /* at end */
379 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
381 return container_of(inode, struct ceph_inode_info, vfs_inode);
384 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
386 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
389 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
391 return (struct ceph_fs_client *)sb->s_fs_info;
394 static inline struct ceph_vino ceph_vino(struct inode *inode)
396 return ceph_inode(inode)->i_vino;
400 * ino_t is <64 bits on many architectures, blech.
402 * i_ino (kernel inode) st_ino (userspace)
407 static inline u32 ceph_ino_to_ino32(__u64 vino)
409 u32 ino = vino & 0xffffffff;
419 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
421 #if BITS_PER_LONG == 32
422 return ceph_ino_to_ino32(vino.ino);
424 return (ino_t)vino.ino;
429 * user-visible ino (stat, filldir)
431 #if BITS_PER_LONG == 32
432 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
437 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
439 if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
440 ino = ceph_ino_to_ino32(ino);
446 /* for printf-style formatting */
447 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
449 static inline u64 ceph_ino(struct inode *inode)
451 return ceph_inode(inode)->i_vino.ino;
453 static inline u64 ceph_snap(struct inode *inode)
455 return ceph_inode(inode)->i_vino.snap;
458 static inline int ceph_ino_compare(struct inode *inode, void *data)
460 struct ceph_vino *pvino = (struct ceph_vino *)data;
461 struct ceph_inode_info *ci = ceph_inode(inode);
462 return ci->i_vino.ino == pvino->ino &&
463 ci->i_vino.snap == pvino->snap;
466 static inline struct inode *ceph_find_inode(struct super_block *sb,
467 struct ceph_vino vino)
469 ino_t t = ceph_vino_to_ino(vino);
470 return ilookup5(sb, t, ceph_ino_compare, &vino);
477 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
478 #define CEPH_I_NODELAY (1 << 1) /* do not delay cap release */
479 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
480 #define CEPH_I_NOFLUSH (1 << 3) /* do not flush dirty caps */
481 #define CEPH_I_POOL_PERM (1 << 4) /* pool rd/wr bits are valid */
482 #define CEPH_I_POOL_RD (1 << 5) /* can read from pool */
483 #define CEPH_I_POOL_WR (1 << 6) /* can write to pool */
484 #define CEPH_I_SEC_INITED (1 << 7) /* security initialized */
485 #define CEPH_I_CAP_DROPPED (1 << 8) /* caps were forcibly dropped */
486 #define CEPH_I_KICK_FLUSH (1 << 9) /* kick flushing caps */
487 #define CEPH_I_FLUSH_SNAPS (1 << 10) /* need flush snapss */
488 #define CEPH_I_ERROR_WRITE (1 << 11) /* have seen write errors */
491 * We set the ERROR_WRITE bit when we start seeing write errors on an inode
492 * and then clear it when they start succeeding. Note that we do a lockless
493 * check first, and only take the lock if it looks like it needs to be changed.
494 * The write submission code just takes this as a hint, so we're not too
495 * worried if a few slip through in either direction.
497 static inline void ceph_set_error_write(struct ceph_inode_info *ci)
499 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
500 spin_lock(&ci->i_ceph_lock);
501 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
502 spin_unlock(&ci->i_ceph_lock);
506 static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
508 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
509 spin_lock(&ci->i_ceph_lock);
510 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
511 spin_unlock(&ci->i_ceph_lock);
515 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
516 long long release_count,
517 long long ordered_count)
519 smp_mb__before_atomic();
520 atomic64_set(&ci->i_complete_seq[0], release_count);
521 atomic64_set(&ci->i_complete_seq[1], ordered_count);
524 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
526 atomic64_inc(&ci->i_release_count);
529 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
531 atomic64_inc(&ci->i_ordered_count);
534 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
536 return atomic64_read(&ci->i_complete_seq[0]) ==
537 atomic64_read(&ci->i_release_count);
540 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
542 return atomic64_read(&ci->i_complete_seq[0]) ==
543 atomic64_read(&ci->i_release_count) &&
544 atomic64_read(&ci->i_complete_seq[1]) ==
545 atomic64_read(&ci->i_ordered_count);
548 static inline void ceph_dir_clear_complete(struct inode *inode)
550 __ceph_dir_clear_complete(ceph_inode(inode));
553 static inline void ceph_dir_clear_ordered(struct inode *inode)
555 __ceph_dir_clear_ordered(ceph_inode(inode));
558 static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
560 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
565 /* find a specific frag @f */
566 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
570 * choose fragment for value @v. copy frag content to pfrag, if leaf
573 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
574 struct ceph_inode_frag *pfrag,
577 static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
579 return (struct ceph_dentry_info *)dentry->d_fsdata;
585 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
587 return !RB_EMPTY_ROOT(&ci->i_caps);
590 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
591 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
592 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
593 struct ceph_cap *cap);
595 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
598 spin_lock(&ci->i_ceph_lock);
599 issued = __ceph_caps_issued(ci, NULL);
600 spin_unlock(&ci->i_ceph_lock);
604 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
608 spin_lock(&ci->i_ceph_lock);
609 r = __ceph_caps_issued_mask(ci, mask, touch);
610 spin_unlock(&ci->i_ceph_lock);
614 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
616 return ci->i_dirty_caps | ci->i_flushing_caps;
618 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
619 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
620 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
621 struct ceph_cap_flush **pcf);
623 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
624 struct ceph_cap *ocap, int mask);
625 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
626 extern int __ceph_caps_used(struct ceph_inode_info *ci);
628 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
631 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
633 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
635 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
636 if (w & CEPH_CAP_FILE_BUFFER)
637 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
641 /* what the mds thinks we want */
642 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
644 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
645 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
646 extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
647 extern void ceph_reserve_caps(struct ceph_mds_client *mdsc,
648 struct ceph_cap_reservation *ctx, int need);
649 extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
650 struct ceph_cap_reservation *ctx);
651 extern void ceph_reservation_status(struct ceph_fs_client *client,
652 int *total, int *avail, int *used,
653 int *reserved, int *min);
658 * we keep buffered readdir results attached to file->private_data
660 #define CEPH_F_SYNC 1
661 #define CEPH_F_ATEND 2
663 struct ceph_file_info {
664 short fmode; /* initialized on open */
665 short flags; /* CEPH_F_* */
667 /* readdir: position within the dir */
669 struct ceph_mds_request *last_readdir;
671 /* readdir: position within a frag */
672 unsigned next_offset; /* offset of next chunk (last_name's + 1) */
673 char *last_name; /* last entry in previous chunk */
674 long long dir_release_count;
675 long long dir_ordered_count;
676 int readdir_cache_idx;
678 /* used for -o dirstat read() on directory thing */
683 struct ceph_readdir_cache_control {
685 struct dentry **dentries;
690 * A "snap realm" describes a subset of the file hierarchy sharing
691 * the same set of snapshots that apply to it. The realms themselves
692 * are organized into a hierarchy, such that children inherit (some of)
693 * the snapshots of their parents.
695 * All inodes within the realm that have capabilities are linked into a
698 struct ceph_snap_realm {
705 u64 parent_since; /* snapid when our current parent became so */
707 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
708 u32 num_prior_parent_snaps; /* had prior to parent_since */
709 u64 *snaps; /* snaps specific to this realm */
712 struct ceph_snap_realm *parent;
713 struct list_head children; /* list of child realms */
714 struct list_head child_item;
716 struct list_head empty_item; /* if i have ref==0 */
718 struct list_head dirty_item; /* if realm needs new context */
720 /* the current set of snaps for this realm */
721 struct ceph_snap_context *cached_context;
723 struct list_head inodes_with_caps;
724 spinlock_t inodes_with_caps_lock;
727 static inline int default_congestion_kb(void)
734 * congestion size, scale with available memory.
746 * This allows larger machines to have larger/more transfers.
747 * Limit the default to 256M
749 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
750 if (congestion_kb > 256*1024)
751 congestion_kb = 256*1024;
753 return congestion_kb;
759 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
761 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
762 struct ceph_snap_realm *realm);
763 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
764 struct ceph_snap_realm *realm);
765 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
766 void *p, void *e, bool deletion,
767 struct ceph_snap_realm **realm_ret);
768 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
769 struct ceph_mds_session *session,
770 struct ceph_msg *msg);
771 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
772 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
773 struct ceph_cap_snap *capsnap);
774 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
777 * a cap_snap is "pending" if it is still awaiting an in-progress
778 * sync write (that may/may not still update size, mtime, etc.).
780 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
782 return !list_empty(&ci->i_cap_snaps) &&
783 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
788 extern const struct inode_operations ceph_file_iops;
790 extern struct inode *ceph_alloc_inode(struct super_block *sb);
791 extern void ceph_destroy_inode(struct inode *inode);
792 extern int ceph_drop_inode(struct inode *inode);
794 extern struct inode *ceph_get_inode(struct super_block *sb,
795 struct ceph_vino vino);
796 extern struct inode *ceph_get_snapdir(struct inode *parent);
797 extern int ceph_fill_file_size(struct inode *inode, int issued,
798 u32 truncate_seq, u64 truncate_size, u64 size);
799 extern void ceph_fill_file_time(struct inode *inode, int issued,
800 u64 time_warp_seq, struct timespec *ctime,
801 struct timespec *mtime, struct timespec *atime);
802 extern int ceph_fill_trace(struct super_block *sb,
803 struct ceph_mds_request *req);
804 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
805 struct ceph_mds_session *session);
807 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
809 extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
810 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
811 extern void ceph_queue_vmtruncate(struct inode *inode);
813 extern void ceph_queue_invalidate(struct inode *inode);
814 extern void ceph_queue_writeback(struct inode *inode);
816 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
817 int mask, bool force);
818 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
820 return __ceph_do_getattr(inode, NULL, mask, force);
822 extern int ceph_permission(struct inode *inode, int mask);
823 extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
824 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
825 extern int ceph_getattr(const struct path *path, struct kstat *stat,
826 u32 request_mask, unsigned int flags);
829 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
830 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
831 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
832 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
833 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
834 extern void __init ceph_xattr_init(void);
835 extern void ceph_xattr_exit(void);
836 extern const struct xattr_handler *ceph_xattr_handlers[];
838 #ifdef CONFIG_SECURITY
839 extern bool ceph_security_xattr_deadlock(struct inode *in);
840 extern bool ceph_security_xattr_wanted(struct inode *in);
842 static inline bool ceph_security_xattr_deadlock(struct inode *in)
846 static inline bool ceph_security_xattr_wanted(struct inode *in)
853 struct ceph_acls_info {
856 struct ceph_pagelist *pagelist;
859 #ifdef CONFIG_CEPH_FS_POSIX_ACL
861 struct posix_acl *ceph_get_acl(struct inode *, int);
862 int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type);
863 int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
864 struct ceph_acls_info *info);
865 void ceph_init_inode_acls(struct inode *inode, struct ceph_acls_info *info);
866 void ceph_release_acls_info(struct ceph_acls_info *info);
868 static inline void ceph_forget_all_cached_acls(struct inode *inode)
870 forget_all_cached_acls(inode);
875 #define ceph_get_acl NULL
876 #define ceph_set_acl NULL
878 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
879 struct ceph_acls_info *info)
883 static inline void ceph_init_inode_acls(struct inode *inode,
884 struct ceph_acls_info *info)
887 static inline void ceph_release_acls_info(struct ceph_acls_info *info)
890 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
895 static inline void ceph_forget_all_cached_acls(struct inode *inode)
902 extern const char *ceph_cap_string(int c);
903 extern void ceph_handle_caps(struct ceph_mds_session *session,
904 struct ceph_msg *msg);
905 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
906 struct ceph_cap_reservation *ctx);
907 extern void ceph_add_cap(struct inode *inode,
908 struct ceph_mds_session *session, u64 cap_id,
909 int fmode, unsigned issued, unsigned wanted,
910 unsigned cap, unsigned seq, u64 realmino, int flags,
911 struct ceph_cap **new_cap);
912 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
913 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
914 struct ceph_cap *cap);
915 extern int ceph_is_any_caps(struct inode *inode);
917 extern void ceph_queue_caps_release(struct inode *inode);
918 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
919 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
921 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
922 struct ceph_mds_session *session);
923 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
924 struct ceph_mds_session *session);
925 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
927 extern int ceph_get_cap_mds(struct inode *inode);
928 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
929 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
930 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
931 struct ceph_snap_context *snapc);
932 extern void ceph_flush_snaps(struct ceph_inode_info *ci,
933 struct ceph_mds_session **psession);
934 extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
935 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
936 struct ceph_mds_session *session);
937 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
938 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
940 extern int ceph_encode_inode_release(void **p, struct inode *inode,
941 int mds, int drop, int unless, int force);
942 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
944 int mds, int drop, int unless);
946 extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
947 loff_t endoff, int *got, struct page **pinned_page);
948 extern int ceph_try_get_caps(struct ceph_inode_info *ci,
949 int need, int want, int *got);
951 /* for counting open files by mode */
952 extern void __ceph_get_fmode(struct ceph_inode_info *ci, int mode);
953 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
956 extern const struct address_space_operations ceph_aops;
957 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
958 extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
959 extern int ceph_pool_perm_check(struct ceph_inode_info *ci, int need);
960 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
963 extern const struct file_operations ceph_file_fops;
965 extern int ceph_renew_caps(struct inode *inode);
966 extern int ceph_open(struct inode *inode, struct file *file);
967 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
968 struct file *file, unsigned flags, umode_t mode,
970 extern int ceph_release(struct inode *inode, struct file *filp);
971 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
972 char *data, size_t len);
975 extern const struct file_operations ceph_dir_fops;
976 extern const struct file_operations ceph_snapdir_fops;
977 extern const struct inode_operations ceph_dir_iops;
978 extern const struct inode_operations ceph_snapdir_iops;
979 extern const struct dentry_operations ceph_dentry_ops;
981 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
982 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
983 extern int ceph_handle_snapdir(struct ceph_mds_request *req,
984 struct dentry *dentry, int err);
985 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
986 struct dentry *dentry, int err);
988 extern void ceph_dentry_lru_add(struct dentry *dn);
989 extern void ceph_dentry_lru_touch(struct dentry *dn);
990 extern void ceph_dentry_lru_del(struct dentry *dn);
991 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
992 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
993 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
996 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
999 extern const struct export_operations ceph_export_ops;
1002 extern __init void ceph_flock_init(void);
1003 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
1004 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
1005 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
1006 extern int ceph_encode_locks_to_buffer(struct inode *inode,
1007 struct ceph_filelock *flocks,
1008 int num_fcntl_locks,
1009 int num_flock_locks);
1010 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
1011 struct ceph_pagelist *pagelist,
1012 int num_fcntl_locks, int num_flock_locks);
1013 extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
1016 extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
1017 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
1019 #endif /* _FS_CEPH_SUPER_H */