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>
18 #include <linux/ceph/libceph.h>
20 #ifdef CONFIG_CEPH_FSCACHE
21 #include <linux/fscache.h>
24 /* f_type in struct statfs */
25 #define CEPH_SUPER_MAGIC 0x00c36400
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)
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 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
40 #define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE
42 #define ceph_set_mount_opt(fsc, opt) \
43 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
44 #define ceph_test_mount_opt(fsc, opt) \
45 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
47 #define CEPH_RSIZE_DEFAULT 0 /* max read size */
48 #define CEPH_RASIZE_DEFAULT (8192*1024) /* readahead */
49 #define CEPH_MAX_READDIR_DEFAULT 1024
50 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
51 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
53 struct ceph_mount_options {
57 int wsize; /* max write size */
58 int rsize; /* max read size */
59 int rasize; /* max readahead */
60 int congestion_kb; /* max writeback in flight */
61 int caps_wanted_delay_min, caps_wanted_delay_max;
62 int cap_release_safety;
63 int max_readdir; /* max readdir result (entires) */
64 int max_readdir_bytes; /* max readdir result (bytes) */
67 * everything above this point can be memcmp'd; everything below
68 * is handled in compare_mount_options()
71 char *snapdir_name; /* default ".snap" */
74 struct ceph_fs_client {
75 struct super_block *sb;
77 struct ceph_mount_options *mount_options;
78 struct ceph_client *client;
80 unsigned long mount_state;
81 int min_caps; /* min caps i added */
83 struct ceph_mds_client *mdsc;
86 mempool_t *wb_pagevec_pool;
87 struct workqueue_struct *wb_wq;
88 struct workqueue_struct *pg_inv_wq;
89 struct workqueue_struct *trunc_wq;
90 atomic_long_t writeback_count;
92 struct backing_dev_info backing_dev_info;
94 #ifdef CONFIG_DEBUG_FS
95 struct dentry *debugfs_dentry_lru, *debugfs_caps;
96 struct dentry *debugfs_congestion_kb;
97 struct dentry *debugfs_bdi;
98 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
99 struct dentry *debugfs_mds_sessions;
102 #ifdef CONFIG_CEPH_FSCACHE
103 struct fscache_cookie *fscache;
104 struct workqueue_struct *revalidate_wq;
110 * File i/o capability. This tracks shared state with the metadata
111 * server that allows us to cache or writeback attributes or to read
112 * and write data. For any given inode, we should have one or more
113 * capabilities, one issued by each metadata server, and our
114 * cumulative access is the OR of all issued capabilities.
116 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
117 * session capability lists.
120 struct ceph_inode_info *ci;
121 struct rb_node ci_node; /* per-ci cap tree */
122 struct ceph_mds_session *session;
123 struct list_head session_caps; /* per-session caplist */
124 u64 cap_id; /* unique cap id (mds provided) */
128 int issued; /* latest, from the mds */
129 int implemented; /* implemented superset of
130 issued (for revocation) */
133 /* caps to release */
139 u32 seq, issue_seq, mseq;
140 u32 cap_gen; /* active/stale cycle */
141 unsigned long last_used;
142 struct list_head caps_item;
145 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
146 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
147 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
150 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
151 * we first complete any in-process sync writes and writeback any dirty
152 * data before flushing the snapped state (tracked here) back to the MDS.
154 struct ceph_cap_snap {
156 struct ceph_inode_info *ci;
157 struct list_head ci_item, flushing_item;
159 u64 follows, flush_tid;
161 struct ceph_snap_context *context;
167 struct ceph_buffer *xattr_blob;
171 struct timespec mtime, atime, ctime;
173 int writing; /* a sync write is still in progress */
174 int dirty_pages; /* dirty pages awaiting writeback */
179 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
181 if (atomic_dec_and_test(&capsnap->nref)) {
182 if (capsnap->xattr_blob)
183 ceph_buffer_put(capsnap->xattr_blob);
188 struct ceph_cap_flush {
191 struct rb_node g_node; // global
193 struct rb_node i_node; // inode
194 struct list_head list;
199 * The frag tree describes how a directory is fragmented, potentially across
200 * multiple metadata servers. It is also used to indicate points where
201 * metadata authority is delegated, and whether/where metadata is replicated.
203 * A _leaf_ frag will be present in the i_fragtree IFF there is
204 * delegation info. That is, if mds >= 0 || ndist > 0.
206 #define CEPH_MAX_DIRFRAG_REP 4
208 struct ceph_inode_frag {
213 int split_by; /* i.e. 2^(split_by) children */
215 /* delegation and replication info */
216 int mds; /* -1 if same authority as parent */
217 int ndist; /* >0 if replicated */
218 int dist[CEPH_MAX_DIRFRAG_REP];
222 * We cache inode xattrs as an encoded blob until they are first used,
223 * at which point we parse them into an rbtree.
225 struct ceph_inode_xattr {
234 int should_free_name;
241 struct ceph_dentry_info {
242 struct ceph_mds_session *lease_session;
243 u32 lease_gen, lease_shared_gen;
245 unsigned long lease_renew_after, lease_renew_from;
246 struct list_head lru;
247 struct dentry *dentry;
252 struct ceph_inode_xattrs_info {
254 * (still encoded) xattr blob. we avoid the overhead of parsing
255 * this until someone actually calls getxattr, etc.
257 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
258 * NULL means we don't know.
260 struct ceph_buffer *blob, *prealloc_blob;
262 struct rb_root index;
267 u64 version, index_version;
273 struct ceph_inode_info {
274 struct ceph_vino i_vino; /* ceph ino + snap */
276 spinlock_t i_ceph_lock;
279 u64 i_inline_version;
282 unsigned i_ceph_flags;
283 atomic64_t i_release_count;
284 atomic64_t i_ordered_count;
285 atomic64_t i_complete_seq[2];
287 struct ceph_dir_layout i_dir_layout;
288 struct ceph_file_layout i_layout;
289 size_t i_pool_ns_len;
293 struct timespec i_rctime;
294 u64 i_rbytes, i_rfiles, i_rsubdirs;
295 u64 i_files, i_subdirs;
297 struct rb_root i_fragtree;
298 struct mutex i_fragtree_mutex;
300 struct ceph_inode_xattrs_info i_xattrs;
302 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
304 struct rb_root i_caps; /* cap list */
305 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
306 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
307 struct list_head i_dirty_item, i_flushing_item;
308 /* we need to track cap writeback on a per-cap-bit basis, to allow
309 * overlapping, pipelined cap flushes to the mds. we can probably
310 * reduce the tid to 8 bits if we're concerned about inode size. */
311 struct ceph_cap_flush *i_prealloc_cap_flush;
312 struct rb_root i_cap_flush_tree;
313 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
314 unsigned long i_hold_caps_min; /* jiffies */
315 unsigned long i_hold_caps_max; /* jiffies */
316 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
317 struct ceph_cap_reservation i_cap_migration_resv;
318 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
319 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
320 dirty|flushing caps */
321 unsigned i_snap_caps; /* cap bits for snapped files */
323 int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */
325 struct mutex i_truncate_mutex;
326 u32 i_truncate_seq; /* last truncate to smaller size */
327 u64 i_truncate_size; /* and the size we last truncated down to */
328 int i_truncate_pending; /* still need to call vmtruncate */
330 u64 i_max_size; /* max file size authorized by mds */
331 u64 i_reported_size; /* (max_)size reported to or requested of mds */
332 u64 i_wanted_max_size; /* offset we'd like to write too */
333 u64 i_requested_max_size; /* max_size we've requested */
335 /* held references to caps */
337 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
338 int i_wrbuffer_ref, i_wrbuffer_ref_head;
339 u32 i_shared_gen; /* increment each time we get FILE_SHARED */
340 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
341 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
343 struct list_head i_unsafe_writes; /* uncommitted sync writes */
344 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
345 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
346 spinlock_t i_unsafe_lock;
348 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
349 int i_snap_realm_counter; /* snap realm (if caps) */
350 struct list_head i_snap_realm_item;
351 struct list_head i_snap_flush_item;
353 struct work_struct i_wb_work; /* writeback work */
354 struct work_struct i_pg_inv_work; /* page invalidation work */
356 struct work_struct i_vmtruncate_work;
358 #ifdef CONFIG_CEPH_FSCACHE
359 struct fscache_cookie *fscache;
360 u32 i_fscache_gen; /* sequence, for delayed fscache validate */
361 struct work_struct i_revalidate_work;
363 struct inode vfs_inode; /* at end */
366 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
368 return container_of(inode, struct ceph_inode_info, vfs_inode);
371 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
373 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
376 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
378 return (struct ceph_fs_client *)sb->s_fs_info;
381 static inline struct ceph_vino ceph_vino(struct inode *inode)
383 return ceph_inode(inode)->i_vino;
387 * ino_t is <64 bits on many architectures, blech.
389 * i_ino (kernel inode) st_ino (userspace)
394 static inline u32 ceph_ino_to_ino32(__u64 vino)
396 u32 ino = vino & 0xffffffff;
406 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
408 #if BITS_PER_LONG == 32
409 return ceph_ino_to_ino32(vino.ino);
411 return (ino_t)vino.ino;
416 * user-visible ino (stat, filldir)
418 #if BITS_PER_LONG == 32
419 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
424 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
426 if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
427 ino = ceph_ino_to_ino32(ino);
433 /* for printf-style formatting */
434 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
436 static inline u64 ceph_ino(struct inode *inode)
438 return ceph_inode(inode)->i_vino.ino;
440 static inline u64 ceph_snap(struct inode *inode)
442 return ceph_inode(inode)->i_vino.snap;
445 static inline int ceph_ino_compare(struct inode *inode, void *data)
447 struct ceph_vino *pvino = (struct ceph_vino *)data;
448 struct ceph_inode_info *ci = ceph_inode(inode);
449 return ci->i_vino.ino == pvino->ino &&
450 ci->i_vino.snap == pvino->snap;
453 static inline struct inode *ceph_find_inode(struct super_block *sb,
454 struct ceph_vino vino)
456 ino_t t = ceph_vino_to_ino(vino);
457 return ilookup5(sb, t, ceph_ino_compare, &vino);
464 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
465 #define CEPH_I_NODELAY (1 << 1) /* do not delay cap release */
466 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
467 #define CEPH_I_NOFLUSH (1 << 3) /* do not flush dirty caps */
468 #define CEPH_I_POOL_PERM (1 << 4) /* pool rd/wr bits are valid */
469 #define CEPH_I_POOL_RD (1 << 5) /* can read from pool */
470 #define CEPH_I_POOL_WR (1 << 6) /* can write to pool */
473 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
474 long long release_count,
475 long long ordered_count)
477 smp_mb__before_atomic();
478 atomic64_set(&ci->i_complete_seq[0], release_count);
479 atomic64_set(&ci->i_complete_seq[1], ordered_count);
482 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
484 atomic64_inc(&ci->i_release_count);
487 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
489 atomic64_inc(&ci->i_ordered_count);
492 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
494 return atomic64_read(&ci->i_complete_seq[0]) ==
495 atomic64_read(&ci->i_release_count);
498 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
500 return atomic64_read(&ci->i_complete_seq[0]) ==
501 atomic64_read(&ci->i_release_count) &&
502 atomic64_read(&ci->i_complete_seq[1]) ==
503 atomic64_read(&ci->i_ordered_count);
506 static inline void ceph_dir_clear_complete(struct inode *inode)
508 __ceph_dir_clear_complete(ceph_inode(inode));
511 static inline void ceph_dir_clear_ordered(struct inode *inode)
513 __ceph_dir_clear_ordered(ceph_inode(inode));
516 static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
518 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
523 /* find a specific frag @f */
524 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
528 * choose fragment for value @v. copy frag content to pfrag, if leaf
531 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
532 struct ceph_inode_frag *pfrag,
535 static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
537 return (struct ceph_dentry_info *)dentry->d_fsdata;
540 static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
542 return ((loff_t)frag << 32) | (loff_t)off;
548 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
550 return !RB_EMPTY_ROOT(&ci->i_caps);
553 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
554 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
555 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
556 struct ceph_cap *cap);
558 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
561 spin_lock(&ci->i_ceph_lock);
562 issued = __ceph_caps_issued(ci, NULL);
563 spin_unlock(&ci->i_ceph_lock);
567 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
571 spin_lock(&ci->i_ceph_lock);
572 r = __ceph_caps_issued_mask(ci, mask, touch);
573 spin_unlock(&ci->i_ceph_lock);
577 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
579 return ci->i_dirty_caps | ci->i_flushing_caps;
581 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
582 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
583 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
584 struct ceph_cap_flush **pcf);
586 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
587 struct ceph_cap *ocap, int mask);
588 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
589 extern int __ceph_caps_used(struct ceph_inode_info *ci);
591 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
594 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
596 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
598 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
599 if (w & CEPH_CAP_FILE_BUFFER)
600 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
604 /* what the mds thinks we want */
605 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
607 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
608 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
609 extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
610 extern void ceph_reserve_caps(struct ceph_mds_client *mdsc,
611 struct ceph_cap_reservation *ctx, int need);
612 extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
613 struct ceph_cap_reservation *ctx);
614 extern void ceph_reservation_status(struct ceph_fs_client *client,
615 int *total, int *avail, int *used,
616 int *reserved, int *min);
621 * we keep buffered readdir results attached to file->private_data
623 #define CEPH_F_SYNC 1
624 #define CEPH_F_ATEND 2
626 struct ceph_file_info {
627 short fmode; /* initialized on open */
628 short flags; /* CEPH_F_* */
630 /* readdir: position within the dir */
632 struct ceph_mds_request *last_readdir;
634 /* readdir: position within a frag */
635 unsigned offset; /* offset of last chunk, adjusted for . and .. */
636 unsigned next_offset; /* offset of next chunk (last_name's + 1) */
637 char *last_name; /* last entry in previous chunk */
638 long long dir_release_count;
639 long long dir_ordered_count;
640 int readdir_cache_idx;
642 /* used for -o dirstat read() on directory thing */
647 struct ceph_readdir_cache_control {
649 struct dentry **dentries;
654 * A "snap realm" describes a subset of the file hierarchy sharing
655 * the same set of snapshots that apply to it. The realms themselves
656 * are organized into a hierarchy, such that children inherit (some of)
657 * the snapshots of their parents.
659 * All inodes within the realm that have capabilities are linked into a
662 struct ceph_snap_realm {
669 u64 parent_since; /* snapid when our current parent became so */
671 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
672 u32 num_prior_parent_snaps; /* had prior to parent_since */
673 u64 *snaps; /* snaps specific to this realm */
676 struct ceph_snap_realm *parent;
677 struct list_head children; /* list of child realms */
678 struct list_head child_item;
680 struct list_head empty_item; /* if i have ref==0 */
682 struct list_head dirty_item; /* if realm needs new context */
684 /* the current set of snaps for this realm */
685 struct ceph_snap_context *cached_context;
687 struct list_head inodes_with_caps;
688 spinlock_t inodes_with_caps_lock;
691 static inline int default_congestion_kb(void)
698 * congestion size, scale with available memory.
710 * This allows larger machines to have larger/more transfers.
711 * Limit the default to 256M
713 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
714 if (congestion_kb > 256*1024)
715 congestion_kb = 256*1024;
717 return congestion_kb;
723 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
725 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
726 struct ceph_snap_realm *realm);
727 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
728 struct ceph_snap_realm *realm);
729 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
730 void *p, void *e, bool deletion,
731 struct ceph_snap_realm **realm_ret);
732 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
733 struct ceph_mds_session *session,
734 struct ceph_msg *msg);
735 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
736 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
737 struct ceph_cap_snap *capsnap);
738 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
741 * a cap_snap is "pending" if it is still awaiting an in-progress
742 * sync write (that may/may not still update size, mtime, etc.).
744 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
746 return !list_empty(&ci->i_cap_snaps) &&
747 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
752 extern const struct inode_operations ceph_file_iops;
754 extern struct inode *ceph_alloc_inode(struct super_block *sb);
755 extern void ceph_destroy_inode(struct inode *inode);
756 extern int ceph_drop_inode(struct inode *inode);
758 extern struct inode *ceph_get_inode(struct super_block *sb,
759 struct ceph_vino vino);
760 extern struct inode *ceph_get_snapdir(struct inode *parent);
761 extern int ceph_fill_file_size(struct inode *inode, int issued,
762 u32 truncate_seq, u64 truncate_size, u64 size);
763 extern void ceph_fill_file_time(struct inode *inode, int issued,
764 u64 time_warp_seq, struct timespec *ctime,
765 struct timespec *mtime, struct timespec *atime);
766 extern int ceph_fill_trace(struct super_block *sb,
767 struct ceph_mds_request *req,
768 struct ceph_mds_session *session);
769 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
770 struct ceph_mds_session *session);
772 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
774 extern int ceph_inode_set_size(struct inode *inode, loff_t size);
775 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
776 extern void ceph_queue_vmtruncate(struct inode *inode);
778 extern void ceph_queue_invalidate(struct inode *inode);
779 extern void ceph_queue_writeback(struct inode *inode);
781 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
782 int mask, bool force);
783 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
785 return __ceph_do_getattr(inode, NULL, mask, force);
787 extern int ceph_permission(struct inode *inode, int mask);
788 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
789 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
793 extern int ceph_setxattr(struct dentry *, const char *, const void *,
795 int __ceph_setxattr(struct dentry *, const char *, const void *, size_t, int);
796 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
797 int __ceph_removexattr(struct dentry *, const char *);
798 extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
799 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
800 extern int ceph_removexattr(struct dentry *, const char *);
801 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
802 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
803 extern void __init ceph_xattr_init(void);
804 extern void ceph_xattr_exit(void);
805 extern const struct xattr_handler *ceph_xattr_handlers[];
808 struct ceph_acls_info {
811 struct ceph_pagelist *pagelist;
814 #ifdef CONFIG_CEPH_FS_POSIX_ACL
816 struct posix_acl *ceph_get_acl(struct inode *, int);
817 int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type);
818 int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
819 struct ceph_acls_info *info);
820 void ceph_init_inode_acls(struct inode *inode, struct ceph_acls_info *info);
821 void ceph_release_acls_info(struct ceph_acls_info *info);
823 static inline void ceph_forget_all_cached_acls(struct inode *inode)
825 forget_all_cached_acls(inode);
830 #define ceph_get_acl NULL
831 #define ceph_set_acl NULL
833 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
834 struct ceph_acls_info *info)
838 static inline void ceph_init_inode_acls(struct inode *inode,
839 struct ceph_acls_info *info)
842 static inline void ceph_release_acls_info(struct ceph_acls_info *info)
845 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
850 static inline void ceph_forget_all_cached_acls(struct inode *inode)
857 extern const char *ceph_cap_string(int c);
858 extern void ceph_handle_caps(struct ceph_mds_session *session,
859 struct ceph_msg *msg);
860 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
861 struct ceph_cap_reservation *ctx);
862 extern void ceph_add_cap(struct inode *inode,
863 struct ceph_mds_session *session, u64 cap_id,
864 int fmode, unsigned issued, unsigned wanted,
865 unsigned cap, unsigned seq, u64 realmino, int flags,
866 struct ceph_cap **new_cap);
867 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
868 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
869 struct ceph_cap *cap);
870 extern int ceph_is_any_caps(struct inode *inode);
872 extern void ceph_queue_caps_release(struct inode *inode);
873 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
874 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
876 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
877 struct ceph_mds_session *session);
878 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
879 struct ceph_mds_session *session);
880 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
882 extern int ceph_get_cap_mds(struct inode *inode);
883 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
884 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
885 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
886 struct ceph_snap_context *snapc);
887 extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
888 struct ceph_mds_session **psession,
890 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
891 struct ceph_mds_session *session);
892 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
893 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
895 extern int ceph_encode_inode_release(void **p, struct inode *inode,
896 int mds, int drop, int unless, int force);
897 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
898 int mds, int drop, int unless);
900 extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
901 loff_t endoff, int *got, struct page **pinned_page);
903 /* for counting open files by mode */
904 static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
906 ci->i_nr_by_mode[mode]++;
908 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
911 extern const struct address_space_operations ceph_aops;
912 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
913 extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
914 extern int ceph_pool_perm_check(struct ceph_inode_info *ci, int need);
915 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
918 extern const struct file_operations ceph_file_fops;
920 extern int ceph_open(struct inode *inode, struct file *file);
921 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
922 struct file *file, unsigned flags, umode_t mode,
924 extern int ceph_release(struct inode *inode, struct file *filp);
925 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
926 char *data, size_t len);
928 extern const struct file_operations ceph_dir_fops;
929 extern const struct file_operations ceph_snapdir_fops;
930 extern const struct inode_operations ceph_dir_iops;
931 extern const struct inode_operations ceph_snapdir_iops;
932 extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
933 ceph_snapdir_dentry_ops;
935 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
936 extern int ceph_handle_snapdir(struct ceph_mds_request *req,
937 struct dentry *dentry, int err);
938 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
939 struct dentry *dentry, int err);
941 extern void ceph_dentry_lru_add(struct dentry *dn);
942 extern void ceph_dentry_lru_touch(struct dentry *dn);
943 extern void ceph_dentry_lru_del(struct dentry *dn);
944 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
945 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
946 extern struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry);
947 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
950 * our d_ops vary depending on whether the inode is live,
951 * snapshotted (read-only), or a virtual ".snap" directory.
953 int ceph_init_dentry(struct dentry *dentry);
957 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
960 extern const struct export_operations ceph_export_ops;
963 extern __init void ceph_flock_init(void);
964 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
965 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
966 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
967 extern int ceph_encode_locks_to_buffer(struct inode *inode,
968 struct ceph_filelock *flocks,
970 int num_flock_locks);
971 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
972 struct ceph_pagelist *pagelist,
973 int num_fcntl_locks, int num_flock_locks);
974 extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
977 extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
978 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
980 #endif /* _FS_CEPH_SUPER_H */