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 #define CHECK_CAPS_FLUSH_FORCE 8 /* force flush any caps */
207
208 struct ceph_cap_flush {
209 u64 tid;
210 int caps;
211 bool wake; /* wake up flush waiters when finish ? */
212 bool is_capsnap; /* true means capsnap */
213 struct list_head g_list; // global
214 struct list_head i_list; // per inode
215 };
216
217 /*
218 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
219 * we first complete any in-process sync writes and writeback any dirty
220 * data before flushing the snapped state (tracked here) back to the MDS.
221 */
222 struct ceph_cap_snap {
223 refcount_t nref;
224 struct list_head ci_item;
225
226 struct ceph_cap_flush cap_flush;
227
228 u64 follows;
229 int issued, dirty;
230 struct ceph_snap_context *context;
231
232 umode_t mode;
233 kuid_t uid;
234 kgid_t gid;
235
236 struct ceph_buffer *xattr_blob;
237 u64 xattr_version;
238
239 u64 size;
240 u64 change_attr;
241 struct timespec64 mtime, atime, ctime, btime;
242 u64 time_warp_seq;
243 u64 truncate_size;
244 u32 truncate_seq;
245 int writing; /* a sync write is still in progress */
246 int dirty_pages; /* dirty pages awaiting writeback */
247 bool inline_data;
248 bool need_flush;
249 };
250
251 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
252 {
253 if (refcount_dec_and_test(&capsnap->nref)) {
254 if (capsnap->xattr_blob)
255 ceph_buffer_put(capsnap->xattr_blob);
256 kmem_cache_free(ceph_cap_snap_cachep, capsnap);
257 }
258 }
259
260 /*
261 * The frag tree describes how a directory is fragmented, potentially across
262 * multiple metadata servers. It is also used to indicate points where
263 * metadata authority is delegated, and whether/where metadata is replicated.
264 *
265 * A _leaf_ frag will be present in the i_fragtree IFF there is
266 * delegation info. That is, if mds >= 0 || ndist > 0.
267 */
268 #define CEPH_MAX_DIRFRAG_REP 4
269
270 struct ceph_inode_frag {
271 struct rb_node node;
272
273 /* fragtree state */
274 u32 frag;
275 int split_by; /* i.e. 2^(split_by) children */
276
277 /* delegation and replication info */
278 int mds; /* -1 if same authority as parent */
279 int ndist; /* >0 if replicated */
280 int dist[CEPH_MAX_DIRFRAG_REP];
281 };
282
283 /*
284 * We cache inode xattrs as an encoded blob until they are first used,
285 * at which point we parse them into an rbtree.
286 */
287 struct ceph_inode_xattr {
288 struct rb_node node;
289
290 const char *name;
291 int name_len;
292 const char *val;
293 int val_len;
294 int dirty;
295
296 int should_free_name;
297 int should_free_val;
298 };
299
300 /*
301 * Ceph dentry state
302 */
303 struct ceph_dentry_info {
304 struct dentry *dentry;
305 struct ceph_mds_session *lease_session;
306 struct list_head lease_list;
307 struct hlist_node hnode;
308 unsigned long flags;
309 int lease_shared_gen;
310 u32 lease_gen;
311 u32 lease_seq;
312 unsigned long lease_renew_after, lease_renew_from;
313 unsigned long time;
314 u64 offset;
315 };
316
317 #define CEPH_DENTRY_REFERENCED (1 << 0)
318 #define CEPH_DENTRY_LEASE_LIST (1 << 1)
319 #define CEPH_DENTRY_SHRINK_LIST (1 << 2)
320 #define CEPH_DENTRY_PRIMARY_LINK (1 << 3)
321 #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4)
322 #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT)
323 #define CEPH_DENTRY_ASYNC_CREATE_BIT (5)
324 #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT)
325
326 struct ceph_inode_xattrs_info {
327 /*
328 * (still encoded) xattr blob. we avoid the overhead of parsing
329 * this until someone actually calls getxattr, etc.
330 *
331 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
332 * NULL means we don't know.
333 */
334 struct ceph_buffer *blob, *prealloc_blob;
335
336 struct rb_root index;
337 bool dirty;
338 int count;
339 int names_size;
340 int vals_size;
341 u64 version, index_version;
342 };
343
344 /*
345 * Ceph inode.
346 */
347 struct ceph_inode_info {
348 struct netfs_inode netfs; /* Netfslib context and vfs inode */
349 struct ceph_vino i_vino; /* ceph ino + snap */
350
351 spinlock_t i_ceph_lock;
352
353 u64 i_version;
354 u64 i_inline_version;
355 u32 i_time_warp_seq;
356
357 unsigned long i_ceph_flags;
358 atomic64_t i_release_count;
359 atomic64_t i_ordered_count;
360 atomic64_t i_complete_seq[2];
361
362 struct ceph_dir_layout i_dir_layout;
363 struct ceph_file_layout i_layout;
364 struct ceph_file_layout i_cached_layout; // for async creates
365 char *i_symlink;
366
367 /* for dirs */
368 struct timespec64 i_rctime;
369 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps;
370 u64 i_files, i_subdirs;
371
372 /* quotas */
373 u64 i_max_bytes, i_max_files;
374
375 s32 i_dir_pin;
376
377 struct rb_root i_fragtree;
378 int i_fragtree_nsplits;
379 struct mutex i_fragtree_mutex;
380
381 struct ceph_inode_xattrs_info i_xattrs;
382
383 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
384 * s_mutex. */
385 struct rb_root i_caps; /* cap list */
386 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
387 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
388
389 /*
390 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty
391 * is protected by the mdsc->cap_dirty_lock, but each individual item
392 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty
393 * requires the mdsc->cap_dirty_lock. List presence for an item can
394 * be tested under the i_ceph_lock. Changing anything requires both.
395 */
396 struct list_head i_dirty_item;
397
398 /*
399 * Link to session's s_cap_flushing list. Protected in a similar
400 * fashion to i_dirty_item, but also by the s_mutex for changes. The
401 * s_cap_flushing list can be walked while holding either the s_mutex
402 * or msdc->cap_dirty_lock. List presence can also be checked while
403 * holding the i_ceph_lock for this inode.
404 */
405 struct list_head i_flushing_item;
406
407 /* we need to track cap writeback on a per-cap-bit basis, to allow
408 * overlapping, pipelined cap flushes to the mds. we can probably
409 * reduce the tid to 8 bits if we're concerned about inode size. */
410 struct ceph_cap_flush *i_prealloc_cap_flush;
411 struct list_head i_cap_flush_list;
412 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
413 unsigned long i_hold_caps_max; /* jiffies */
414 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
415 struct ceph_cap_reservation i_cap_migration_resv;
416 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
417 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
418 dirty|flushing caps */
419 unsigned i_snap_caps; /* cap bits for snapped files */
420
421 unsigned long i_last_rd;
422 unsigned long i_last_wr;
423 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
424
425 struct mutex i_truncate_mutex;
426 u32 i_truncate_seq; /* last truncate to smaller size */
427 u64 i_truncate_size; /* and the size we last truncated down to */
428 int i_truncate_pending; /* still need to call vmtruncate */
429 /*
430 * For none fscrypt case it equals to i_truncate_size or it will
431 * equals to fscrypt_file_size
432 */
433 u64 i_truncate_pagecache_size;
434
435 u64 i_max_size; /* max file size authorized by mds */
436 u64 i_reported_size; /* (max_)size reported to or requested of mds */
437 u64 i_wanted_max_size; /* offset we'd like to write too */
438 u64 i_requested_max_size; /* max_size we've requested */
439
440 /* held references to caps */
441 int i_pin_ref;
442 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref;
443 int i_wrbuffer_ref, i_wrbuffer_ref_head;
444 atomic_t i_filelock_ref;
445 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */
446 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
447 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
448
449 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
450 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
451 spinlock_t i_unsafe_lock;
452
453 union {
454 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
455 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */
456 };
457 struct list_head i_snap_realm_item;
458 struct list_head i_snap_flush_item;
459 struct timespec64 i_btime;
460 struct timespec64 i_snap_btime;
461
462 struct work_struct i_work;
463 unsigned long i_work_mask;
464
465 #ifdef CONFIG_FS_ENCRYPTION
466 u32 fscrypt_auth_len;
467 u32 fscrypt_file_len;
468 u8 *fscrypt_auth;
469 u8 *fscrypt_file;
470 #endif
471 };
472
473 struct ceph_netfs_request_data {
474 int caps;
475
476 /*
477 * Maximum size of a file readahead request.
478 * The fadvise could update the bdi's default ra_pages.
479 */
480 unsigned int file_ra_pages;
481
482 /* Set it if fadvise disables file readahead entirely */
483 bool file_ra_disabled;
484 };
485
486 static inline struct ceph_inode_info *
487 ceph_inode(const struct inode *inode)
488 {
489 return container_of(inode, struct ceph_inode_info, netfs.inode);
490 }
491
492 static inline struct ceph_fs_client *
493 ceph_inode_to_fs_client(const struct inode *inode)
494 {
495 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
496 }
497
498 static inline struct ceph_fs_client *
499 ceph_sb_to_fs_client(const struct super_block *sb)
500 {
501 return (struct ceph_fs_client *)sb->s_fs_info;
502 }
503
504 static inline struct ceph_mds_client *
505 ceph_sb_to_mdsc(const struct super_block *sb)
506 {
507 return (struct ceph_mds_client *)ceph_sb_to_fs_client(sb)->mdsc;
508 }
509
510 static inline struct ceph_client *
511 ceph_inode_to_client(const struct inode *inode)
512 {
513 return (struct ceph_client *)ceph_inode_to_fs_client(inode)->client;
514 }
515
516 static inline struct ceph_vino
517 ceph_vino(const struct inode *inode)
518 {
519 return ceph_inode(inode)->i_vino;
520 }
521
522 static inline u32 ceph_ino_to_ino32(u64 vino)
523 {
524 u32 ino = vino & 0xffffffff;
525 ino ^= vino >> 32;
526 if (!ino)
527 ino = 2;
528 return ino;
529 }
530
531 /*
532 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on
533 * some arches. We generally do not use this value inside the ceph driver, but
534 * we do want to set it to something, so that generic vfs code has an
535 * appropriate value for tracepoints and the like.
536 */
537 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
538 {
539 if (sizeof(ino_t) == sizeof(u32))
540 return ceph_ino_to_ino32(vino.ino);
541 return (ino_t)vino.ino;
542 }
543
544 /* for printf-style formatting */
545 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
546
547 static inline u64 ceph_ino(struct inode *inode)
548 {
549 return ceph_inode(inode)->i_vino.ino;
550 }
551
552 static inline u64 ceph_snap(struct inode *inode)
553 {
554 return ceph_inode(inode)->i_vino.snap;
555 }
556
557 /**
558 * ceph_present_ino - format an inode number for presentation to userland
559 * @sb: superblock where the inode lives
560 * @ino: inode number to (possibly) convert
561 *
562 * If the user mounted with the ino32 option, then the 64-bit value needs
563 * to be converted to something that can fit inside 32 bits. Note that
564 * internal kernel code never uses this value, so this is entirely for
565 * userland consumption.
566 */
567 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
568 {
569 if (unlikely(ceph_test_mount_opt(ceph_sb_to_fs_client(sb), INO32)))
570 return ceph_ino_to_ino32(ino);
571 return ino;
572 }
573
574 static inline u64 ceph_present_inode(struct inode *inode)
575 {
576 return ceph_present_ino(inode->i_sb, ceph_ino(inode));
577 }
578
579 static inline int ceph_ino_compare(struct inode *inode, void *data)
580 {
581 struct ceph_vino *pvino = (struct ceph_vino *)data;
582 struct ceph_inode_info *ci = ceph_inode(inode);
583 return ci->i_vino.ino == pvino->ino &&
584 ci->i_vino.snap == pvino->snap;
585 }
586
587 /*
588 * The MDS reserves a set of inodes for its own usage. These should never
589 * be accessible by clients, and so the MDS has no reason to ever hand these
590 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE.
591 *
592 * These come from src/mds/mdstypes.h in the ceph sources.
593 */
594 #define CEPH_MAX_MDS 0x100
595 #define CEPH_NUM_STRAY 10
596 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS)
597 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS)
598 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY))
599
600 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino)
601 {
602 if (vino.ino >= CEPH_INO_SYSTEM_BASE ||
603 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET)
604 return false;
605
606 /* Don't warn on mdsdirs */
607 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET,
608 "Attempt to access reserved inode number 0x%llx",
609 vino.ino);
610 return true;
611 }
612
613 static inline struct inode *ceph_find_inode(struct super_block *sb,
614 struct ceph_vino vino)
615 {
616 if (ceph_vino_is_reserved(vino))
617 return NULL;
618
619 /*
620 * NB: The hashval will be run through the fs/inode.c hash function
621 * anyway, so there is no need to squash the inode number down to
622 * 32-bits first. Just use low-order bits on arches with 32-bit long.
623 */
624 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
625 }
626
627
628 /*
629 * Ceph inode.
630 */
631 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
632 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
633 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */
634 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */
635 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */
636 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */
637 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */
638 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */
639 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */
640 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */
641 #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */
642 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */
643 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT)
644 #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */
645 #define CEPH_I_ASYNC_CHECK_CAPS (1 << 14) /* check caps immediately after async
646 creating finishes */
647
648 /*
649 * Masks of ceph inode work.
650 */
651 #define CEPH_I_WORK_WRITEBACK 0
652 #define CEPH_I_WORK_INVALIDATE_PAGES 1
653 #define CEPH_I_WORK_VMTRUNCATE 2
654 #define CEPH_I_WORK_CHECK_CAPS 3
655 #define CEPH_I_WORK_FLUSH_SNAPS 4
656
657 /*
658 * We set the ERROR_WRITE bit when we start seeing write errors on an inode
659 * and then clear it when they start succeeding. Note that we do a lockless
660 * check first, and only take the lock if it looks like it needs to be changed.
661 * The write submission code just takes this as a hint, so we're not too
662 * worried if a few slip through in either direction.
663 */
664 static inline void ceph_set_error_write(struct ceph_inode_info *ci)
665 {
666 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
667 spin_lock(&ci->i_ceph_lock);
668 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
669 spin_unlock(&ci->i_ceph_lock);
670 }
671 }
672
673 static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
674 {
675 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
676 spin_lock(&ci->i_ceph_lock);
677 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
678 spin_unlock(&ci->i_ceph_lock);
679 }
680 }
681
682 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
683 long long release_count,
684 long long ordered_count)
685 {
686 /*
687 * Makes sure operations that setup readdir cache (update page
688 * cache and i_size) are strongly ordered w.r.t. the following
689 * atomic64_set() operations.
690 */
691 smp_mb();
692 atomic64_set(&ci->i_complete_seq[0], release_count);
693 atomic64_set(&ci->i_complete_seq[1], ordered_count);
694 }
695
696 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
697 {
698 atomic64_inc(&ci->i_release_count);
699 }
700
701 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
702 {
703 atomic64_inc(&ci->i_ordered_count);
704 }
705
706 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
707 {
708 return atomic64_read(&ci->i_complete_seq[0]) ==
709 atomic64_read(&ci->i_release_count);
710 }
711
712 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
713 {
714 return atomic64_read(&ci->i_complete_seq[0]) ==
715 atomic64_read(&ci->i_release_count) &&
716 atomic64_read(&ci->i_complete_seq[1]) ==
717 atomic64_read(&ci->i_ordered_count);
718 }
719
720 static inline void ceph_dir_clear_complete(struct inode *inode)
721 {
722 __ceph_dir_clear_complete(ceph_inode(inode));
723 }
724
725 static inline void ceph_dir_clear_ordered(struct inode *inode)
726 {
727 __ceph_dir_clear_ordered(ceph_inode(inode));
728 }
729
730 static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
731 {
732 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
733 smp_rmb();
734 return ret;
735 }
736
737 /* find a specific frag @f */
738 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
739 u32 f);
740
741 /*
742 * choose fragment for value @v. copy frag content to pfrag, if leaf
743 * exists
744 */
745 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
746 struct ceph_inode_frag *pfrag,
747 int *found);
748
749 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
750 {
751 return (struct ceph_dentry_info *)dentry->d_fsdata;
752 }
753
754 /*
755 * caps helpers
756 */
757 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
758 {
759 return !RB_EMPTY_ROOT(&ci->i_caps);
760 }
761
762 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
763 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
764 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask,
765 int t);
766 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
767 struct ceph_cap *cap);
768
769 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
770 {
771 int issued;
772 spin_lock(&ci->i_ceph_lock);
773 issued = __ceph_caps_issued(ci, NULL);
774 spin_unlock(&ci->i_ceph_lock);
775 return issued;
776 }
777
778 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci,
779 int mask, int touch)
780 {
781 int r;
782 spin_lock(&ci->i_ceph_lock);
783 r = __ceph_caps_issued_mask_metric(ci, mask, touch);
784 spin_unlock(&ci->i_ceph_lock);
785 return r;
786 }
787
788 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
789 {
790 return ci->i_dirty_caps | ci->i_flushing_caps;
791 }
792 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
793 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
794 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
795 struct ceph_cap_flush **pcf);
796
797 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
798 struct ceph_cap *ocap, int mask);
799 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
800 extern int __ceph_caps_used(struct ceph_inode_info *ci);
801
802 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci)
803 {
804 return ci->i_nr_by_mode[0];
805 }
806 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
807 extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
808
809 /* what the mds thinks we want */
810 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
811
812 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
813 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
814 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
815 struct ceph_mount_options *fsopt);
816 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
817 struct ceph_cap_reservation *ctx, int need);
818 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
819 struct ceph_cap_reservation *ctx);
820 extern void ceph_reservation_status(struct ceph_fs_client *client,
821 int *total, int *avail, int *used,
822 int *reserved, int *min);
823 extern void change_auth_cap_ses(struct ceph_inode_info *ci,
824 struct ceph_mds_session *session);
825
826
827
828 /*
829 * we keep buffered readdir results attached to file->private_data
830 */
831 #define CEPH_F_SYNC 1
832 #define CEPH_F_ATEND 2
833
834 struct ceph_file_info {
835 short fmode; /* initialized on open */
836 short flags; /* CEPH_F_* */
837
838 spinlock_t rw_contexts_lock;
839 struct list_head rw_contexts;
840
841 u32 filp_gen;
842 };
843
844 struct ceph_dir_file_info {
845 struct ceph_file_info file_info;
846
847 /* readdir: position within the dir */
848 u32 frag;
849 struct ceph_mds_request *last_readdir;
850
851 /* readdir: position within a frag */
852 unsigned next_offset; /* offset of next chunk (last_name's + 1) */
853 char *last_name; /* last entry in previous chunk */
854 long long dir_release_count;
855 long long dir_ordered_count;
856 int readdir_cache_idx;
857
858 /* used for -o dirstat read() on directory thing */
859 char *dir_info;
860 int dir_info_len;
861 };
862
863 struct ceph_rw_context {
864 struct list_head list;
865 struct task_struct *thread;
866 int caps;
867 };
868
869 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
870 struct ceph_rw_context _name = { \
871 .thread = current, \
872 .caps = _caps, \
873 }
874
875 static inline void ceph_add_rw_context(struct ceph_file_info *cf,
876 struct ceph_rw_context *ctx)
877 {
878 spin_lock(&cf->rw_contexts_lock);
879 list_add(&ctx->list, &cf->rw_contexts);
880 spin_unlock(&cf->rw_contexts_lock);
881 }
882
883 static inline void ceph_del_rw_context(struct ceph_file_info *cf,
884 struct ceph_rw_context *ctx)
885 {
886 spin_lock(&cf->rw_contexts_lock);
887 list_del(&ctx->list);
888 spin_unlock(&cf->rw_contexts_lock);
889 }
890
891 static inline struct ceph_rw_context*
892 ceph_find_rw_context(struct ceph_file_info *cf)
893 {
894 struct ceph_rw_context *ctx, *found = NULL;
895 spin_lock(&cf->rw_contexts_lock);
896 list_for_each_entry(ctx, &cf->rw_contexts, list) {
897 if (ctx->thread == current) {
898 found = ctx;
899 break;
900 }
901 }
902 spin_unlock(&cf->rw_contexts_lock);
903 return found;
904 }
905
906 struct ceph_readdir_cache_control {
907 struct page *page;
908 struct dentry **dentries;
909 int index;
910 };
911
912 /*
913 * A "snap realm" describes a subset of the file hierarchy sharing
914 * the same set of snapshots that apply to it. The realms themselves
915 * are organized into a hierarchy, such that children inherit (some of)
916 * the snapshots of their parents.
917 *
918 * All inodes within the realm that have capabilities are linked into a
919 * per-realm list.
920 */
921 struct ceph_snap_realm {
922 u64 ino;
923 struct inode *inode;
924 atomic_t nref;
925 struct rb_node node;
926
927 u64 created, seq;
928 u64 parent_ino;
929 u64 parent_since; /* snapid when our current parent became so */
930
931 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
932 u32 num_prior_parent_snaps; /* had prior to parent_since */
933 u64 *snaps; /* snaps specific to this realm */
934 u32 num_snaps;
935
936 struct ceph_snap_realm *parent;
937 struct list_head children; /* list of child realms */
938 struct list_head child_item;
939
940 struct list_head empty_item; /* if i have ref==0 */
941
942 struct list_head dirty_item; /* if realm needs new context */
943
944 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */
945
946 /* the current set of snaps for this realm */
947 struct ceph_snap_context *cached_context;
948
949 struct list_head inodes_with_caps;
950 spinlock_t inodes_with_caps_lock;
951 };
952
953 static inline int default_congestion_kb(void)
954 {
955 int congestion_kb;
956
957 /*
958 * Copied from NFS
959 *
960 * congestion size, scale with available memory.
961 *
962 * 64MB: 8192k
963 * 128MB: 11585k
964 * 256MB: 16384k
965 * 512MB: 23170k
966 * 1GB: 32768k
967 * 2GB: 46340k
968 * 4GB: 65536k
969 * 8GB: 92681k
970 * 16GB: 131072k
971 *
972 * This allows larger machines to have larger/more transfers.
973 * Limit the default to 256M
974 */
975 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
976 if (congestion_kb > 256*1024)
977 congestion_kb = 256*1024;
978
979 return congestion_kb;
980 }
981
982
983 /* super.c */
984 extern int ceph_force_reconnect(struct super_block *sb);
985 /* snap.c */
986 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
987 u64 ino);
988 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
989 struct ceph_snap_realm *realm);
990 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
991 struct ceph_snap_realm *realm);
992 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
993 void *p, void *e, bool deletion,
994 struct ceph_snap_realm **realm_ret);
995 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm);
996 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
997 struct ceph_mds_session *session,
998 struct ceph_msg *msg);
999 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
1000 struct ceph_cap_snap *capsnap);
1001 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc);
1002
1003 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
1004 u64 snap);
1005 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
1006 struct ceph_snapid_map *sm);
1007 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
1008 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
1009 void ceph_umount_begin(struct super_block *sb);
1010
1011
1012 /*
1013 * a cap_snap is "pending" if it is still awaiting an in-progress
1014 * sync write (that may/may not still update size, mtime, etc.).
1015 */
1016 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
1017 {
1018 return !list_empty(&ci->i_cap_snaps) &&
1019 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
1020 ci_item)->writing;
1021 }
1022
1023 /* inode.c */
1024 struct ceph_mds_reply_info_in;
1025 struct ceph_mds_reply_dirfrag;
1026 struct ceph_acl_sec_ctx;
1027
1028 extern const struct inode_operations ceph_file_iops;
1029
1030 extern struct inode *ceph_alloc_inode(struct super_block *sb);
1031 extern void ceph_evict_inode(struct inode *inode);
1032 extern void ceph_free_inode(struct inode *inode);
1033
1034 struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry,
1035 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx);
1036 void ceph_as_ctx_to_req(struct ceph_mds_request *req,
1037 struct ceph_acl_sec_ctx *as_ctx);
1038
1039 extern struct inode *ceph_get_inode(struct super_block *sb,
1040 struct ceph_vino vino,
1041 struct inode *newino);
1042 extern struct inode *ceph_get_snapdir(struct inode *parent);
1043 extern int ceph_fill_file_size(struct inode *inode, int issued,
1044 u32 truncate_seq, u64 truncate_size, u64 size);
1045 extern void ceph_fill_file_time(struct inode *inode, int issued,
1046 u64 time_warp_seq, struct timespec64 *ctime,
1047 struct timespec64 *mtime,
1048 struct timespec64 *atime);
1049 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page,
1050 struct ceph_mds_reply_info_in *iinfo,
1051 struct ceph_mds_reply_dirfrag *dirinfo,
1052 struct ceph_mds_session *session, int cap_fmode,
1053 struct ceph_cap_reservation *caps_reservation);
1054 extern int ceph_fill_trace(struct super_block *sb,
1055 struct ceph_mds_request *req);
1056 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1057 struct ceph_mds_session *session);
1058
1059 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
1060
1061 extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
1062 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
1063
1064 void ceph_queue_inode_work(struct inode *inode, int work_bit);
1065
1066 static inline void ceph_queue_vmtruncate(struct inode *inode)
1067 {
1068 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE);
1069 }
1070
1071 static inline void ceph_queue_invalidate(struct inode *inode)
1072 {
1073 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES);
1074 }
1075
1076 static inline void ceph_queue_writeback(struct inode *inode)
1077 {
1078 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK);
1079 }
1080
1081 static inline void ceph_queue_check_caps(struct inode *inode)
1082 {
1083 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS);
1084 }
1085
1086 static inline void ceph_queue_flush_snaps(struct inode *inode)
1087 {
1088 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS);
1089 }
1090
1091 extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask);
1092 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
1093 int mask, bool force);
1094 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
1095 {
1096 return __ceph_do_getattr(inode, NULL, mask, force);
1097 }
1098 extern int ceph_permission(struct mnt_idmap *idmap,
1099 struct inode *inode, int mask);
1100
1101 struct ceph_iattr {
1102 struct ceph_fscrypt_auth *fscrypt_auth;
1103 };
1104
1105 extern int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode,
1106 struct iattr *attr, struct ceph_iattr *cia);
1107 extern int ceph_setattr(struct mnt_idmap *idmap,
1108 struct dentry *dentry, struct iattr *attr);
1109 extern int ceph_getattr(struct mnt_idmap *idmap,
1110 const struct path *path, struct kstat *stat,
1111 u32 request_mask, unsigned int flags);
1112 void ceph_inode_shutdown(struct inode *inode);
1113
1114 static inline bool ceph_inode_is_shutdown(struct inode *inode)
1115 {
1116 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags);
1117 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
1118 int state = READ_ONCE(fsc->mount_state);
1119
1120 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN;
1121 }
1122
1123 /* xattr.c */
1124 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
1125 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size);
1126 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
1127 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
1128 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
1129 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
1130 extern const struct xattr_handler * const ceph_xattr_handlers[];
1131
1132 struct ceph_acl_sec_ctx {
1133 #ifdef CONFIG_CEPH_FS_POSIX_ACL
1134 void *default_acl;
1135 void *acl;
1136 #endif
1137 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
1138 void *sec_ctx;
1139 u32 sec_ctxlen;
1140 #endif
1141 #ifdef CONFIG_FS_ENCRYPTION
1142 struct ceph_fscrypt_auth *fscrypt_auth;
1143 #endif
1144 struct ceph_pagelist *pagelist;
1145 };
1146
1147 #ifdef CONFIG_SECURITY
1148 extern bool ceph_security_xattr_deadlock(struct inode *in);
1149 extern bool ceph_security_xattr_wanted(struct inode *in);
1150 #else
1151 static inline bool ceph_security_xattr_deadlock(struct inode *in)
1152 {
1153 return false;
1154 }
1155 static inline bool ceph_security_xattr_wanted(struct inode *in)
1156 {
1157 return false;
1158 }
1159 #endif
1160
1161 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
1162 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
1163 struct ceph_acl_sec_ctx *ctx);
1164 static inline void ceph_security_invalidate_secctx(struct inode *inode)
1165 {
1166 security_inode_invalidate_secctx(inode);
1167 }
1168 #else
1169 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
1170 struct ceph_acl_sec_ctx *ctx)
1171 {
1172 return 0;
1173 }
1174 static inline void ceph_security_invalidate_secctx(struct inode *inode)
1175 {
1176 }
1177 #endif
1178
1179 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
1180
1181 /* acl.c */
1182 #ifdef CONFIG_CEPH_FS_POSIX_ACL
1183
1184 struct posix_acl *ceph_get_acl(struct inode *, int, bool);
1185 int ceph_set_acl(struct mnt_idmap *idmap,
1186 struct dentry *dentry, struct posix_acl *acl, int type);
1187 int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1188 struct ceph_acl_sec_ctx *as_ctx);
1189 void ceph_init_inode_acls(struct inode *inode,
1190 struct ceph_acl_sec_ctx *as_ctx);
1191
1192 static inline void ceph_forget_all_cached_acls(struct inode *inode)
1193 {
1194 forget_all_cached_acls(inode);
1195 }
1196
1197 #else
1198
1199 #define ceph_get_acl NULL
1200 #define ceph_set_acl NULL
1201
1202 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1203 struct ceph_acl_sec_ctx *as_ctx)
1204 {
1205 return 0;
1206 }
1207 static inline void ceph_init_inode_acls(struct inode *inode,
1208 struct ceph_acl_sec_ctx *as_ctx)
1209 {
1210 }
1211 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
1212 {
1213 return 0;
1214 }
1215
1216 static inline void ceph_forget_all_cached_acls(struct inode *inode)
1217 {
1218 }
1219
1220 #endif
1221
1222 /* caps.c */
1223 extern const char *ceph_cap_string(int c);
1224 extern void ceph_handle_caps(struct ceph_mds_session *session,
1225 struct ceph_msg *msg);
1226 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
1227 struct ceph_cap_reservation *ctx);
1228 extern void ceph_add_cap(struct inode *inode,
1229 struct ceph_mds_session *session, u64 cap_id,
1230 unsigned issued, unsigned wanted,
1231 unsigned cap, unsigned seq, u64 realmino, int flags,
1232 struct ceph_cap **new_cap);
1233 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
1234 extern void ceph_remove_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
1235 bool queue_release);
1236 extern void __ceph_remove_caps(struct ceph_inode_info *ci);
1237 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
1238 struct ceph_cap *cap);
1239 extern int ceph_is_any_caps(struct inode *inode);
1240
1241 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
1242 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
1243 int datasync);
1244 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
1245 struct ceph_mds_session *session);
1246 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
1247 struct ceph_mds_session *session);
1248 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session,
1249 struct ceph_inode_info *ci);
1250 extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci,
1251 int mds);
1252 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
1253 int mds);
1254 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps,
1255 bool snap_rwsem_locked);
1256 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
1257 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
1258 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had);
1259 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
1260 struct ceph_snap_context *snapc);
1261 extern void __ceph_remove_capsnap(struct inode *inode,
1262 struct ceph_cap_snap *capsnap,
1263 bool *wake_ci, bool *wake_mdsc);
1264 extern void ceph_remove_capsnap(struct inode *inode,
1265 struct ceph_cap_snap *capsnap,
1266 bool *wake_ci, bool *wake_mdsc);
1267 extern void ceph_flush_snaps(struct ceph_inode_info *ci,
1268 struct ceph_mds_session **psession);
1269 extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
1270 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags);
1271 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
1272 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
1273 extern int ceph_drop_caps_for_unlink(struct inode *inode);
1274 extern int ceph_encode_inode_release(void **p, struct inode *inode,
1275 int mds, int drop, int unless, int force);
1276 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
1277 struct inode *dir,
1278 int mds, int drop, int unless);
1279
1280 extern int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi,
1281 int need, int want, loff_t endoff, int *got);
1282 extern int ceph_get_caps(struct file *filp, int need, int want,
1283 loff_t endoff, int *got);
1284 extern int ceph_try_get_caps(struct inode *inode,
1285 int need, int want, bool nonblock, int *got);
1286
1287 /* for counting open files by mode */
1288 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count);
1289 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count);
1290 extern void __ceph_touch_fmode(struct ceph_inode_info *ci,
1291 struct ceph_mds_client *mdsc, int fmode);
1292
1293 /* addr.c */
1294 extern const struct address_space_operations ceph_aops;
1295 extern const struct netfs_request_ops ceph_netfs_ops;
1296 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
1297 extern int ceph_uninline_data(struct file *file);
1298 extern int ceph_pool_perm_check(struct inode *inode, int need);
1299 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
1300 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate);
1301
1302 static inline bool ceph_has_inline_data(struct ceph_inode_info *ci)
1303 {
1304 if (ci->i_inline_version == CEPH_INLINE_NONE ||
1305 ci->i_inline_version == 1) /* initial version, no data */
1306 return false;
1307 return true;
1308 }
1309
1310 /* file.c */
1311 extern const struct file_operations ceph_file_fops;
1312
1313 extern int ceph_renew_caps(struct inode *inode, int fmode);
1314 extern int ceph_open(struct inode *inode, struct file *file);
1315 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
1316 struct file *file, unsigned flags, umode_t mode);
1317 extern ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos,
1318 struct iov_iter *to, int *retry_op,
1319 u64 *last_objver);
1320 extern int ceph_release(struct inode *inode, struct file *filp);
1321 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
1322 char *data, size_t len);
1323
1324 /* dir.c */
1325 extern const struct file_operations ceph_dir_fops;
1326 extern const struct file_operations ceph_snapdir_fops;
1327 extern const struct inode_operations ceph_dir_iops;
1328 extern const struct inode_operations ceph_snapdir_iops;
1329 extern const struct dentry_operations ceph_dentry_ops;
1330
1331 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
1332 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
1333 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
1334 struct dentry *dentry);
1335 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
1336 struct dentry *dentry, int err);
1337
1338 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
1339 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
1340 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
1341 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
1342 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
1343 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
1344
1345 /* ioctl.c */
1346 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1347
1348 /* export.c */
1349 extern const struct export_operations ceph_export_ops;
1350 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
1351
1352 /* locks.c */
1353 extern __init void ceph_flock_init(void);
1354 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
1355 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
1356 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
1357 extern int ceph_encode_locks_to_buffer(struct inode *inode,
1358 struct ceph_filelock *flocks,
1359 int num_fcntl_locks,
1360 int num_flock_locks);
1361 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
1362 struct ceph_pagelist *pagelist,
1363 int num_fcntl_locks, int num_flock_locks);
1364
1365 /* debugfs.c */
1366 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
1367 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
1368
1369 /* quota.c */
1370
1371 enum quota_get_realm {
1372 QUOTA_GET_MAX_FILES,
1373 QUOTA_GET_MAX_BYTES,
1374 QUOTA_GET_ANY
1375 };
1376
1377 static inline bool __ceph_has_quota(struct ceph_inode_info *ci,
1378 enum quota_get_realm which)
1379 {
1380 bool has_quota = false;
1381
1382 switch (which) {
1383 case QUOTA_GET_MAX_BYTES:
1384 has_quota = !!ci->i_max_bytes;
1385 break;
1386 case QUOTA_GET_MAX_FILES:
1387 has_quota = !!ci->i_max_files;
1388 break;
1389 default:
1390 has_quota = !!(ci->i_max_files || ci->i_max_bytes);
1391 }
1392 return has_quota;
1393 }
1394
1395 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
1396
1397 static inline void __ceph_update_quota(struct ceph_inode_info *ci,
1398 u64 max_bytes, u64 max_files)
1399 {
1400 bool had_quota, has_quota;
1401 had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY);
1402 ci->i_max_bytes = max_bytes;
1403 ci->i_max_files = max_files;
1404 has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY);
1405
1406 if (had_quota != has_quota)
1407 ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota);
1408 }
1409
1410 static inline int __ceph_sparse_read_ext_count(struct inode *inode, u64 len)
1411 {
1412 int cnt = 0;
1413
1414 if (IS_ENCRYPTED(inode)) {
1415 cnt = len >> CEPH_FSCRYPT_BLOCK_SHIFT;
1416 if (cnt > CEPH_SPARSE_EXT_ARRAY_INITIAL)
1417 cnt = 0;
1418 }
1419
1420 return cnt;
1421 }
1422
1423 extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
1424 struct ceph_mds_session *session,
1425 struct ceph_msg *msg);
1426 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
1427 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
1428 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
1429 loff_t newlen);
1430 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
1431 loff_t newlen);
1432 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
1433 struct kstatfs *buf);
1434 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
1435
1436 bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc,
1437 struct ceph_mds_session *session);
1438 void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc);
1439 bool ceph_inc_osd_stopping_blocker(struct ceph_mds_client *mdsc);
1440 void ceph_dec_osd_stopping_blocker(struct ceph_mds_client *mdsc);
1441 #endif /* _FS_CEPH_SUPER_H */
1442
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