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 <linux/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 limitation 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 #define CEPH_NAMESPACE_WILDCARD "*"
108
ceph_namespace_match(const char * pattern,const char * target)109 static inline bool ceph_namespace_match(const char *pattern,
110 const char *target)
111 {
112 if (!pattern || !pattern[0] ||
113 !strcmp(pattern, CEPH_NAMESPACE_WILDCARD))
114 return true;
115
116 return !strcmp(pattern, target);
117 }
118
119 /*
120 * Check if the mds namespace in ceph_mount_options matches
121 * the passed in namespace string. First time match (when
122 * ->mds_namespace is NULL) is treated specially, since
123 * ->mds_namespace needs to be initialized by the caller.
124 */
namespace_equals(struct ceph_mount_options * fsopt,const char * namespace,size_t len)125 static inline bool namespace_equals(struct ceph_mount_options *fsopt,
126 const char *namespace, size_t len)
127 {
128 return !(fsopt->mds_namespace &&
129 (strlen(fsopt->mds_namespace) != len ||
130 strncmp(fsopt->mds_namespace, namespace, len)));
131 }
132
133 /* mount state */
134 enum {
135 CEPH_MOUNT_MOUNTING,
136 CEPH_MOUNT_MOUNTED,
137 CEPH_MOUNT_UNMOUNTING,
138 CEPH_MOUNT_UNMOUNTED,
139 CEPH_MOUNT_SHUTDOWN,
140 CEPH_MOUNT_RECOVER,
141 CEPH_MOUNT_FENCE_IO,
142 };
143
144 #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8
145
146 struct ceph_fs_client {
147 struct super_block *sb;
148
149 struct list_head metric_wakeup;
150
151 struct ceph_mount_options *mount_options;
152 struct ceph_client *client;
153
154 int mount_state;
155
156 bool blocklisted;
157
158 bool have_copy_from2;
159
160 u32 filp_gen;
161 loff_t max_file_size;
162
163 struct ceph_mds_client *mdsc;
164
165 atomic_long_t writeback_count;
166 bool write_congested;
167
168 struct workqueue_struct *inode_wq;
169 struct workqueue_struct *cap_wq;
170
171 DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS);
172 spinlock_t async_unlink_conflict_lock;
173
174 #ifdef CONFIG_DEBUG_FS
175 struct dentry *debugfs_dentry_lru, *debugfs_caps;
176 struct dentry *debugfs_congestion_kb;
177 struct dentry *debugfs_bdi;
178 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
179 struct dentry *debugfs_status;
180 struct dentry *debugfs_mds_sessions;
181 struct dentry *debugfs_metrics_dir;
182 #endif
183
184 #ifdef CONFIG_CEPH_FSCACHE
185 struct fscache_volume *fscache;
186 #endif
187 #ifdef CONFIG_FS_ENCRYPTION
188 struct fscrypt_dummy_policy fsc_dummy_enc_policy;
189 #endif
190 };
191
192 /*
193 * File i/o capability. This tracks shared state with the metadata
194 * server that allows us to cache or writeback attributes or to read
195 * and write data. For any given inode, we should have one or more
196 * capabilities, one issued by each metadata server, and our
197 * cumulative access is the OR of all issued capabilities.
198 *
199 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
200 * session capability lists.
201 */
202 struct ceph_cap {
203 struct ceph_inode_info *ci;
204 struct rb_node ci_node; /* per-ci cap tree */
205 struct ceph_mds_session *session;
206 struct list_head session_caps; /* per-session caplist */
207 u64 cap_id; /* unique cap id (mds provided) */
208 union {
209 /* in-use caps */
210 struct {
211 int issued; /* latest, from the mds */
212 int implemented; /* implemented superset of
213 issued (for revocation) */
214 int mds; /* mds index for this cap */
215 int mds_wanted; /* caps wanted from this mds */
216 };
217 /* caps to release */
218 struct {
219 u64 cap_ino;
220 int queue_release;
221 };
222 };
223 u32 seq, issue_seq, mseq;
224 u32 cap_gen; /* active/stale cycle */
225 unsigned long last_used;
226 struct list_head caps_item;
227 };
228
229 #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */
230 #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */
231 #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */
232 #define CHECK_CAPS_FLUSH_FORCE 8 /* force flush any caps */
233
234 struct ceph_cap_flush {
235 u64 tid;
236 int caps;
237 bool wake; /* wake up flush waiters when finish ? */
238 bool is_capsnap; /* true means capsnap */
239 struct list_head g_list; // global
240 struct list_head i_list; // per inode
241 };
242
243 /*
244 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
245 * we first complete any in-process sync writes and writeback any dirty
246 * data before flushing the snapped state (tracked here) back to the MDS.
247 */
248 struct ceph_cap_snap {
249 refcount_t nref;
250 struct list_head ci_item;
251
252 struct ceph_cap_flush cap_flush;
253
254 u64 follows;
255 int issued, dirty;
256 struct ceph_snap_context *context;
257
258 umode_t mode;
259 kuid_t uid;
260 kgid_t gid;
261
262 struct ceph_buffer *xattr_blob;
263 u64 xattr_version;
264
265 u64 size;
266 u64 change_attr;
267 struct timespec64 mtime, atime, ctime, btime;
268 u64 time_warp_seq;
269 u64 truncate_size;
270 u32 truncate_seq;
271 int writing; /* a sync write is still in progress */
272 int dirty_pages; /* dirty pages awaiting writeback */
273 bool inline_data;
274 bool need_flush;
275 };
276
ceph_put_cap_snap(struct ceph_cap_snap * capsnap)277 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
278 {
279 if (refcount_dec_and_test(&capsnap->nref)) {
280 if (capsnap->xattr_blob)
281 ceph_buffer_put(capsnap->xattr_blob);
282 kmem_cache_free(ceph_cap_snap_cachep, capsnap);
283 }
284 }
285
286 /*
287 * The frag tree describes how a directory is fragmented, potentially across
288 * multiple metadata servers. It is also used to indicate points where
289 * metadata authority is delegated, and whether/where metadata is replicated.
290 *
291 * A _leaf_ frag will be present in the i_fragtree IFF there is
292 * delegation info. That is, if mds >= 0 || ndist > 0.
293 */
294 #define CEPH_MAX_DIRFRAG_REP 4
295
296 struct ceph_inode_frag {
297 struct rb_node node;
298
299 /* fragtree state */
300 u32 frag;
301 int split_by; /* i.e. 2^(split_by) children */
302
303 /* delegation and replication info */
304 int mds; /* -1 if same authority as parent */
305 int ndist; /* >0 if replicated */
306 int dist[CEPH_MAX_DIRFRAG_REP];
307 };
308
309 /*
310 * We cache inode xattrs as an encoded blob until they are first used,
311 * at which point we parse them into an rbtree.
312 */
313 struct ceph_inode_xattr {
314 struct rb_node node;
315
316 const char *name;
317 int name_len;
318 const char *val;
319 int val_len;
320 int dirty;
321
322 int should_free_name;
323 int should_free_val;
324 };
325
326 /*
327 * Ceph dentry state
328 */
329 struct ceph_dentry_info {
330 struct dentry *dentry;
331 struct ceph_mds_session *lease_session;
332 struct list_head lease_list;
333 struct hlist_node hnode;
334 unsigned long flags;
335 int lease_shared_gen;
336 u32 lease_gen;
337 u32 lease_seq;
338 unsigned long lease_renew_after, lease_renew_from;
339 unsigned long time;
340 u64 offset;
341 };
342
343 #define CEPH_DENTRY_REFERENCED (1 << 0)
344 #define CEPH_DENTRY_LEASE_LIST (1 << 1)
345 #define CEPH_DENTRY_SHRINK_LIST (1 << 2)
346 #define CEPH_DENTRY_PRIMARY_LINK (1 << 3)
347 #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4)
348 #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT)
349 #define CEPH_DENTRY_ASYNC_CREATE_BIT (5)
350 #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT)
351
352 struct ceph_inode_xattrs_info {
353 /*
354 * (still encoded) xattr blob. we avoid the overhead of parsing
355 * this until someone actually calls getxattr, etc.
356 *
357 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
358 * NULL means we don't know.
359 */
360 struct ceph_buffer *blob, *prealloc_blob;
361
362 struct rb_root index;
363 bool dirty;
364 int count;
365 int names_size;
366 int vals_size;
367 u64 version, index_version;
368 };
369
370 /*
371 * Ceph inode.
372 */
373 struct ceph_inode_info {
374 struct netfs_inode netfs; /* Netfslib context and vfs inode */
375 struct ceph_vino i_vino; /* ceph ino + snap */
376
377 spinlock_t i_ceph_lock;
378
379 u64 i_version;
380 u64 i_inline_version;
381 u32 i_time_warp_seq;
382
383 unsigned long i_ceph_flags;
384 atomic64_t i_release_count;
385 atomic64_t i_ordered_count;
386 atomic64_t i_complete_seq[2];
387
388 struct ceph_dir_layout i_dir_layout;
389 struct ceph_file_layout i_layout;
390 struct ceph_file_layout i_cached_layout; // for async creates
391 char *i_symlink;
392
393 /* for dirs */
394 struct timespec64 i_rctime;
395 u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps;
396 u64 i_files, i_subdirs;
397
398 /* quotas */
399 u64 i_max_bytes, i_max_files;
400
401 s32 i_dir_pin;
402
403 struct rb_root i_fragtree;
404 int i_fragtree_nsplits;
405 struct mutex i_fragtree_mutex;
406
407 struct ceph_inode_xattrs_info i_xattrs;
408
409 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
410 * s_mutex. */
411 struct rb_root i_caps; /* cap list */
412 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
413 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
414
415 /*
416 * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty
417 * is protected by the mdsc->cap_dirty_lock, but each individual item
418 * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty
419 * requires the mdsc->cap_dirty_lock. List presence for an item can
420 * be tested under the i_ceph_lock. Changing anything requires both.
421 */
422 struct list_head i_dirty_item;
423
424 /*
425 * Link to session's s_cap_flushing list. Protected in a similar
426 * fashion to i_dirty_item, but also by the s_mutex for changes. The
427 * s_cap_flushing list can be walked while holding either the s_mutex
428 * or msdc->cap_dirty_lock. List presence can also be checked while
429 * holding the i_ceph_lock for this inode.
430 */
431 struct list_head i_flushing_item;
432
433 /* we need to track cap writeback on a per-cap-bit basis, to allow
434 * overlapping, pipelined cap flushes to the mds. we can probably
435 * reduce the tid to 8 bits if we're concerned about inode size. */
436 struct ceph_cap_flush *i_prealloc_cap_flush;
437 struct list_head i_cap_flush_list;
438 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
439 unsigned long i_hold_caps_max; /* jiffies */
440 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
441 struct ceph_cap_reservation i_cap_migration_resv;
442 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
443 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
444 dirty|flushing caps */
445 unsigned i_snap_caps; /* cap bits for snapped files */
446
447 unsigned long i_last_rd;
448 unsigned long i_last_wr;
449 int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
450
451 struct mutex i_truncate_mutex;
452 u32 i_truncate_seq; /* last truncate to smaller size */
453 u64 i_truncate_size; /* and the size we last truncated down to */
454 int i_truncate_pending; /* still need to call vmtruncate */
455 /*
456 * For none fscrypt case it equals to i_truncate_size or it will
457 * equals to fscrypt_file_size
458 */
459 u64 i_truncate_pagecache_size;
460
461 u64 i_max_size; /* max file size authorized by mds */
462 u64 i_reported_size; /* (max_)size reported to or requested of mds */
463 u64 i_wanted_max_size; /* offset we'd like to write too */
464 u64 i_requested_max_size; /* max_size we've requested */
465
466 /* held references to caps */
467 int i_pin_ref;
468 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref;
469 int i_wrbuffer_ref, i_wrbuffer_ref_head;
470 atomic_t i_filelock_ref;
471 atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */
472 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
473 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
474
475 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
476 struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
477 spinlock_t i_unsafe_lock;
478
479 union {
480 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
481 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */
482 };
483 struct list_head i_snap_realm_item;
484 struct list_head i_snap_flush_item;
485 struct timespec64 i_btime;
486 struct timespec64 i_snap_btime;
487
488 struct work_struct i_work;
489 unsigned long i_work_mask;
490
491 #ifdef CONFIG_FS_ENCRYPTION
492 struct fscrypt_inode_info *i_crypt_info;
493 u32 fscrypt_auth_len;
494 u32 fscrypt_file_len;
495 u8 *fscrypt_auth;
496 u8 *fscrypt_file;
497 #endif
498 };
499
500 struct ceph_netfs_request_data {
501 int caps;
502
503 /*
504 * Maximum size of a file readahead request.
505 * The fadvise could update the bdi's default ra_pages.
506 */
507 unsigned int file_ra_pages;
508
509 /* Set it if fadvise disables file readahead entirely */
510 bool file_ra_disabled;
511 };
512
513 static inline struct ceph_inode_info *
ceph_inode(const struct inode * inode)514 ceph_inode(const struct inode *inode)
515 {
516 return container_of(inode, struct ceph_inode_info, netfs.inode);
517 }
518
519 static inline struct ceph_fs_client *
ceph_inode_to_fs_client(const struct inode * inode)520 ceph_inode_to_fs_client(const struct inode *inode)
521 {
522 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
523 }
524
525 static inline struct ceph_fs_client *
ceph_sb_to_fs_client(const struct super_block * sb)526 ceph_sb_to_fs_client(const struct super_block *sb)
527 {
528 return (struct ceph_fs_client *)sb->s_fs_info;
529 }
530
531 static inline struct ceph_mds_client *
ceph_sb_to_mdsc(const struct super_block * sb)532 ceph_sb_to_mdsc(const struct super_block *sb)
533 {
534 return (struct ceph_mds_client *)ceph_sb_to_fs_client(sb)->mdsc;
535 }
536
537 static inline struct ceph_client *
ceph_inode_to_client(const struct inode * inode)538 ceph_inode_to_client(const struct inode *inode)
539 {
540 return (struct ceph_client *)ceph_inode_to_fs_client(inode)->client;
541 }
542
543 static inline struct ceph_vino
ceph_vino(const struct inode * inode)544 ceph_vino(const struct inode *inode)
545 {
546 return ceph_inode(inode)->i_vino;
547 }
548
ceph_ino_to_ino32(u64 vino)549 static inline u32 ceph_ino_to_ino32(u64 vino)
550 {
551 u32 ino = vino & 0xffffffff;
552 ino ^= vino >> 32;
553 if (!ino)
554 ino = 2;
555 return ino;
556 }
557
558 /*
559 * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on
560 * some arches. We generally do not use this value inside the ceph driver, but
561 * we do want to set it to something, so that generic vfs code has an
562 * appropriate value for tracepoints and the like.
563 */
ceph_vino_to_ino_t(struct ceph_vino vino)564 static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
565 {
566 if (sizeof(ino_t) == sizeof(u32))
567 return ceph_ino_to_ino32(vino.ino);
568 return (ino_t)vino.ino;
569 }
570
571 /* for printf-style formatting */
572 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
573
ceph_ino(struct inode * inode)574 static inline u64 ceph_ino(struct inode *inode)
575 {
576 return ceph_inode(inode)->i_vino.ino;
577 }
578
ceph_snap(struct inode * inode)579 static inline u64 ceph_snap(struct inode *inode)
580 {
581 return ceph_inode(inode)->i_vino.snap;
582 }
583
584 /**
585 * ceph_present_ino - format an inode number for presentation to userland
586 * @sb: superblock where the inode lives
587 * @ino: inode number to (possibly) convert
588 *
589 * If the user mounted with the ino32 option, then the 64-bit value needs
590 * to be converted to something that can fit inside 32 bits. Note that
591 * internal kernel code never uses this value, so this is entirely for
592 * userland consumption.
593 */
ceph_present_ino(struct super_block * sb,u64 ino)594 static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
595 {
596 if (unlikely(ceph_test_mount_opt(ceph_sb_to_fs_client(sb), INO32)))
597 return ceph_ino_to_ino32(ino);
598 return ino;
599 }
600
ceph_present_inode(struct inode * inode)601 static inline u64 ceph_present_inode(struct inode *inode)
602 {
603 return ceph_present_ino(inode->i_sb, ceph_ino(inode));
604 }
605
ceph_ino_compare(struct inode * inode,void * data)606 static inline int ceph_ino_compare(struct inode *inode, void *data)
607 {
608 struct ceph_vino *pvino = (struct ceph_vino *)data;
609 struct ceph_inode_info *ci = ceph_inode(inode);
610 return ci->i_vino.ino == pvino->ino &&
611 ci->i_vino.snap == pvino->snap;
612 }
613
614 /*
615 * The MDS reserves a set of inodes for its own usage. These should never
616 * be accessible by clients, and so the MDS has no reason to ever hand these
617 * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE.
618 *
619 * These come from src/mds/mdstypes.h in the ceph sources.
620 */
621 #define CEPH_MAX_MDS 0x100
622 #define CEPH_NUM_STRAY 10
623 #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS)
624 #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS)
625 #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY))
626
ceph_vino_is_reserved(const struct ceph_vino vino)627 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino)
628 {
629 if (vino.ino >= CEPH_INO_SYSTEM_BASE ||
630 vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET)
631 return false;
632
633 /* Don't warn on mdsdirs */
634 WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET,
635 "Attempt to access reserved inode number 0x%llx",
636 vino.ino);
637 return true;
638 }
639
ceph_find_inode(struct super_block * sb,struct ceph_vino vino)640 static inline struct inode *ceph_find_inode(struct super_block *sb,
641 struct ceph_vino vino)
642 {
643 if (ceph_vino_is_reserved(vino))
644 return NULL;
645
646 /*
647 * NB: The hashval will be run through the fs/inode.c hash function
648 * anyway, so there is no need to squash the inode number down to
649 * 32-bits first. Just use low-order bits on arches with 32-bit long.
650 */
651 return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
652 }
653
654
655 /*
656 * Ceph inode.
657 */
658 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
659 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
660 #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */
661 #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */
662 #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */
663 #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */
664 #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */
665 #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */
666 #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */
667 #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */
668 #define CEPH_I_ODIRECT_BIT (11) /* inode in direct I/O mode */
669 #define CEPH_I_ODIRECT (1 << CEPH_I_ODIRECT_BIT)
670 #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */
671 #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT)
672 #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */
673 #define CEPH_I_ASYNC_CHECK_CAPS (1 << 14) /* check caps immediately after async
674 creating finishes */
675
676 /*
677 * Masks of ceph inode work.
678 */
679 #define CEPH_I_WORK_WRITEBACK 0
680 #define CEPH_I_WORK_INVALIDATE_PAGES 1
681 #define CEPH_I_WORK_VMTRUNCATE 2
682 #define CEPH_I_WORK_CHECK_CAPS 3
683 #define CEPH_I_WORK_FLUSH_SNAPS 4
684
685 /*
686 * We set the ERROR_WRITE bit when we start seeing write errors on an inode
687 * and then clear it when they start succeeding. Note that we do a lockless
688 * check first, and only take the lock if it looks like it needs to be changed.
689 * The write submission code just takes this as a hint, so we're not too
690 * worried if a few slip through in either direction.
691 */
ceph_set_error_write(struct ceph_inode_info * ci)692 static inline void ceph_set_error_write(struct ceph_inode_info *ci)
693 {
694 if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
695 spin_lock(&ci->i_ceph_lock);
696 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
697 spin_unlock(&ci->i_ceph_lock);
698 }
699 }
700
ceph_clear_error_write(struct ceph_inode_info * ci)701 static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
702 {
703 if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
704 spin_lock(&ci->i_ceph_lock);
705 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
706 spin_unlock(&ci->i_ceph_lock);
707 }
708 }
709
__ceph_dir_set_complete(struct ceph_inode_info * ci,long long release_count,long long ordered_count)710 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
711 long long release_count,
712 long long ordered_count)
713 {
714 /*
715 * Makes sure operations that setup readdir cache (update page
716 * cache and i_size) are strongly ordered w.r.t. the following
717 * atomic64_set() operations.
718 */
719 smp_mb();
720 atomic64_set(&ci->i_complete_seq[0], release_count);
721 atomic64_set(&ci->i_complete_seq[1], ordered_count);
722 }
723
__ceph_dir_clear_complete(struct ceph_inode_info * ci)724 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
725 {
726 atomic64_inc(&ci->i_release_count);
727 }
728
__ceph_dir_clear_ordered(struct ceph_inode_info * ci)729 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
730 {
731 atomic64_inc(&ci->i_ordered_count);
732 }
733
__ceph_dir_is_complete(struct ceph_inode_info * ci)734 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
735 {
736 return atomic64_read(&ci->i_complete_seq[0]) ==
737 atomic64_read(&ci->i_release_count);
738 }
739
__ceph_dir_is_complete_ordered(struct ceph_inode_info * ci)740 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
741 {
742 return atomic64_read(&ci->i_complete_seq[0]) ==
743 atomic64_read(&ci->i_release_count) &&
744 atomic64_read(&ci->i_complete_seq[1]) ==
745 atomic64_read(&ci->i_ordered_count);
746 }
747
ceph_dir_clear_complete(struct inode * inode)748 static inline void ceph_dir_clear_complete(struct inode *inode)
749 {
750 __ceph_dir_clear_complete(ceph_inode(inode));
751 }
752
ceph_dir_clear_ordered(struct inode * inode)753 static inline void ceph_dir_clear_ordered(struct inode *inode)
754 {
755 __ceph_dir_clear_ordered(ceph_inode(inode));
756 }
757
ceph_dir_is_complete_ordered(struct inode * inode)758 static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
759 {
760 bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
761 smp_rmb();
762 return ret;
763 }
764
765 /* find a specific frag @f */
766 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
767 u32 f);
768
769 /*
770 * choose fragment for value @v. copy frag content to pfrag, if leaf
771 * exists
772 */
773 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
774 struct ceph_inode_frag *pfrag,
775 int *found);
776
ceph_dentry(const struct dentry * dentry)777 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
778 {
779 return (struct ceph_dentry_info *)dentry->d_fsdata;
780 }
781
782 /*
783 * caps helpers
784 */
__ceph_is_any_real_caps(struct ceph_inode_info * ci)785 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
786 {
787 return !RB_EMPTY_ROOT(&ci->i_caps);
788 }
789
790 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
791 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
792 extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask,
793 int t);
794 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
795 struct ceph_cap *cap);
796
ceph_caps_issued(struct ceph_inode_info * ci)797 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
798 {
799 int issued;
800 spin_lock(&ci->i_ceph_lock);
801 issued = __ceph_caps_issued(ci, NULL);
802 spin_unlock(&ci->i_ceph_lock);
803 return issued;
804 }
805
ceph_caps_issued_mask_metric(struct ceph_inode_info * ci,int mask,int touch)806 static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci,
807 int mask, int touch)
808 {
809 int r;
810 spin_lock(&ci->i_ceph_lock);
811 r = __ceph_caps_issued_mask_metric(ci, mask, touch);
812 spin_unlock(&ci->i_ceph_lock);
813 return r;
814 }
815
__ceph_caps_dirty(struct ceph_inode_info * ci)816 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
817 {
818 return ci->i_dirty_caps | ci->i_flushing_caps;
819 }
820 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
821 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
822 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
823 struct ceph_cap_flush **pcf);
824
825 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
826 struct ceph_cap *ocap, int mask);
827 extern int __ceph_caps_used(struct ceph_inode_info *ci);
828
__ceph_is_file_opened(struct ceph_inode_info * ci)829 static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci)
830 {
831 return ci->i_nr_by_mode[0];
832 }
833 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
834 extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
835
836 /* what the mds thinks we want */
837 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
838
839 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
840 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
841 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
842 struct ceph_mount_options *fsopt);
843 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
844 struct ceph_cap_reservation *ctx, int need);
845 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
846 struct ceph_cap_reservation *ctx);
847 extern void ceph_reservation_status(struct ceph_fs_client *client,
848 int *total, int *avail, int *used,
849 int *reserved, int *min);
850 extern void change_auth_cap_ses(struct ceph_inode_info *ci,
851 struct ceph_mds_session *session);
852
853
854
855 /*
856 * we keep buffered readdir results attached to file->private_data
857 */
858 #define CEPH_F_SYNC 1
859 #define CEPH_F_ATEND 2
860
861 struct ceph_file_info {
862 short fmode; /* initialized on open */
863 short flags; /* CEPH_F_* */
864
865 spinlock_t rw_contexts_lock;
866 struct list_head rw_contexts;
867
868 u32 filp_gen;
869 };
870
871 struct ceph_dir_file_info {
872 struct ceph_file_info file_info;
873
874 /* readdir: position within the dir */
875 u32 frag;
876 struct ceph_mds_request *last_readdir;
877
878 /* readdir: position within a frag */
879 unsigned next_offset; /* offset of next chunk (last_name's + 1) */
880 char *last_name; /* last entry in previous chunk */
881 long long dir_release_count;
882 long long dir_ordered_count;
883 int readdir_cache_idx;
884
885 /* used for -o dirstat read() on directory thing */
886 char *dir_info;
887 int dir_info_len;
888 };
889
890 struct ceph_rw_context {
891 struct list_head list;
892 struct task_struct *thread;
893 int caps;
894 };
895
896 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
897 struct ceph_rw_context _name = { \
898 .thread = current, \
899 .caps = _caps, \
900 }
901
ceph_add_rw_context(struct ceph_file_info * cf,struct ceph_rw_context * ctx)902 static inline void ceph_add_rw_context(struct ceph_file_info *cf,
903 struct ceph_rw_context *ctx)
904 {
905 spin_lock(&cf->rw_contexts_lock);
906 list_add(&ctx->list, &cf->rw_contexts);
907 spin_unlock(&cf->rw_contexts_lock);
908 }
909
ceph_del_rw_context(struct ceph_file_info * cf,struct ceph_rw_context * ctx)910 static inline void ceph_del_rw_context(struct ceph_file_info *cf,
911 struct ceph_rw_context *ctx)
912 {
913 spin_lock(&cf->rw_contexts_lock);
914 list_del(&ctx->list);
915 spin_unlock(&cf->rw_contexts_lock);
916 }
917
918 static inline struct ceph_rw_context*
ceph_find_rw_context(struct ceph_file_info * cf)919 ceph_find_rw_context(struct ceph_file_info *cf)
920 {
921 struct ceph_rw_context *ctx, *found = NULL;
922 spin_lock(&cf->rw_contexts_lock);
923 list_for_each_entry(ctx, &cf->rw_contexts, list) {
924 if (ctx->thread == current) {
925 found = ctx;
926 break;
927 }
928 }
929 spin_unlock(&cf->rw_contexts_lock);
930 return found;
931 }
932
933 struct ceph_readdir_cache_control {
934 struct folio *folio;
935 struct dentry **dentries;
936 int index;
937 };
938
939 /*
940 * A "snap realm" describes a subset of the file hierarchy sharing
941 * the same set of snapshots that apply to it. The realms themselves
942 * are organized into a hierarchy, such that children inherit (some of)
943 * the snapshots of their parents.
944 *
945 * All inodes within the realm that have capabilities are linked into a
946 * per-realm list.
947 */
948 struct ceph_snap_realm {
949 u64 ino;
950 struct inode *inode;
951 atomic_t nref;
952 struct rb_node node;
953
954 u64 created, seq;
955 u64 parent_ino;
956 u64 parent_since; /* snapid when our current parent became so */
957
958 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
959 u32 num_prior_parent_snaps; /* had prior to parent_since */
960 u64 *snaps; /* snaps specific to this realm */
961 u32 num_snaps;
962
963 struct ceph_snap_realm *parent;
964 struct list_head children; /* list of child realms */
965 struct list_head child_item;
966
967 struct list_head empty_item; /* if i have ref==0 */
968
969 struct list_head dirty_item; /* if realm needs new context */
970
971 struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */
972
973 /* the current set of snaps for this realm */
974 struct ceph_snap_context *cached_context;
975
976 struct list_head inodes_with_caps;
977 spinlock_t inodes_with_caps_lock;
978 };
979
default_congestion_kb(void)980 static inline int default_congestion_kb(void)
981 {
982 int congestion_kb;
983
984 /*
985 * Copied from NFS
986 *
987 * congestion size, scale with available memory.
988 *
989 * 64MB: 8192k
990 * 128MB: 11585k
991 * 256MB: 16384k
992 * 512MB: 23170k
993 * 1GB: 32768k
994 * 2GB: 46340k
995 * 4GB: 65536k
996 * 8GB: 92681k
997 * 16GB: 131072k
998 *
999 * This allows larger machines to have larger/more transfers.
1000 * Limit the default to 256M
1001 */
1002 congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
1003 if (congestion_kb > 256*1024)
1004 congestion_kb = 256*1024;
1005
1006 return congestion_kb;
1007 }
1008
1009
1010 /* super.c */
1011 extern int ceph_force_reconnect(struct super_block *sb);
1012 /* snap.c */
1013 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
1014 u64 ino);
1015 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
1016 struct ceph_snap_realm *realm);
1017 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
1018 struct ceph_snap_realm *realm);
1019 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
1020 void *p, void *e, bool deletion,
1021 struct ceph_snap_realm **realm_ret);
1022 void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm);
1023 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
1024 struct ceph_mds_session *session,
1025 struct ceph_msg *msg);
1026 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
1027 struct ceph_cap_snap *capsnap);
1028 extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc);
1029
1030 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
1031 u64 snap);
1032 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
1033 struct ceph_snapid_map *sm);
1034 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
1035 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
1036 void ceph_umount_begin(struct super_block *sb);
1037
1038
1039 /*
1040 * a cap_snap is "pending" if it is still awaiting an in-progress
1041 * sync write (that may/may not still update size, mtime, etc.).
1042 */
__ceph_have_pending_cap_snap(struct ceph_inode_info * ci)1043 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
1044 {
1045 return !list_empty(&ci->i_cap_snaps) &&
1046 list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
1047 ci_item)->writing;
1048 }
1049
1050 /* inode.c */
1051 struct ceph_mds_reply_info_in;
1052 struct ceph_mds_reply_dirfrag;
1053 struct ceph_acl_sec_ctx;
1054
1055 extern const struct inode_operations ceph_file_iops;
1056
1057 extern struct inode *ceph_alloc_inode(struct super_block *sb);
1058 extern void ceph_evict_inode(struct inode *inode);
1059 extern void ceph_free_inode(struct inode *inode);
1060
1061 struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry,
1062 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx);
1063 void ceph_as_ctx_to_req(struct ceph_mds_request *req,
1064 struct ceph_acl_sec_ctx *as_ctx);
1065
1066 extern struct inode *ceph_get_inode(struct super_block *sb,
1067 struct ceph_vino vino,
1068 struct inode *newino);
1069 extern struct inode *ceph_get_snapdir(struct inode *parent);
1070 extern int ceph_fill_file_size(struct inode *inode, int issued,
1071 u32 truncate_seq, u64 truncate_size, u64 size);
1072 extern void ceph_fill_file_time(struct inode *inode, int issued,
1073 u64 time_warp_seq, struct timespec64 *ctime,
1074 struct timespec64 *mtime,
1075 struct timespec64 *atime);
1076 extern int ceph_fill_inode(struct inode *inode, struct page *locked_page,
1077 struct ceph_mds_reply_info_in *iinfo,
1078 struct ceph_mds_reply_dirfrag *dirinfo,
1079 struct ceph_mds_session *session, int cap_fmode,
1080 struct ceph_cap_reservation *caps_reservation);
1081 extern int ceph_fill_trace(struct super_block *sb,
1082 struct ceph_mds_request *req);
1083 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1084 struct ceph_mds_session *session);
1085
1086 extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
1087 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
1088
1089 void ceph_queue_inode_work(struct inode *inode, int work_bit);
1090
ceph_queue_vmtruncate(struct inode * inode)1091 static inline void ceph_queue_vmtruncate(struct inode *inode)
1092 {
1093 ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE);
1094 }
1095
ceph_queue_invalidate(struct inode * inode)1096 static inline void ceph_queue_invalidate(struct inode *inode)
1097 {
1098 ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES);
1099 }
1100
ceph_queue_writeback(struct inode * inode)1101 static inline void ceph_queue_writeback(struct inode *inode)
1102 {
1103 ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK);
1104 }
1105
ceph_queue_check_caps(struct inode * inode)1106 static inline void ceph_queue_check_caps(struct inode *inode)
1107 {
1108 ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS);
1109 }
1110
ceph_queue_flush_snaps(struct inode * inode)1111 static inline void ceph_queue_flush_snaps(struct inode *inode)
1112 {
1113 ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS);
1114 }
1115
1116 extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask);
1117 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
1118 int mask, bool force);
ceph_do_getattr(struct inode * inode,int mask,bool force)1119 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
1120 {
1121 return __ceph_do_getattr(inode, NULL, mask, force);
1122 }
1123 extern int ceph_permission(struct mnt_idmap *idmap,
1124 struct inode *inode, int mask);
1125
1126 struct ceph_iattr {
1127 struct ceph_fscrypt_auth *fscrypt_auth;
1128 };
1129
1130 extern int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode,
1131 struct iattr *attr, struct ceph_iattr *cia);
1132 extern int ceph_setattr(struct mnt_idmap *idmap,
1133 struct dentry *dentry, struct iattr *attr);
1134 extern int ceph_getattr(struct mnt_idmap *idmap,
1135 const struct path *path, struct kstat *stat,
1136 u32 request_mask, unsigned int flags);
1137 void ceph_inode_shutdown(struct inode *inode);
1138
ceph_inode_is_shutdown(struct inode * inode)1139 static inline bool ceph_inode_is_shutdown(struct inode *inode)
1140 {
1141 unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags);
1142 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
1143 int state = READ_ONCE(fsc->mount_state);
1144
1145 return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN;
1146 }
1147
1148 /* xattr.c */
1149 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
1150 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size);
1151 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
1152 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
1153 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
1154 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
1155 extern const struct xattr_handler * const ceph_xattr_handlers[];
1156
1157 struct ceph_acl_sec_ctx {
1158 #ifdef CONFIG_CEPH_FS_POSIX_ACL
1159 void *default_acl;
1160 void *acl;
1161 #endif
1162 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
1163 struct lsm_context lsmctx;
1164 #endif
1165 #ifdef CONFIG_FS_ENCRYPTION
1166 struct ceph_fscrypt_auth *fscrypt_auth;
1167 #endif
1168 struct ceph_pagelist *pagelist;
1169 };
1170
1171 #ifdef CONFIG_SECURITY
1172 extern bool ceph_security_xattr_deadlock(struct inode *in);
1173 extern bool ceph_security_xattr_wanted(struct inode *in);
1174 #else
ceph_security_xattr_deadlock(struct inode * in)1175 static inline bool ceph_security_xattr_deadlock(struct inode *in)
1176 {
1177 return false;
1178 }
ceph_security_xattr_wanted(struct inode * in)1179 static inline bool ceph_security_xattr_wanted(struct inode *in)
1180 {
1181 return false;
1182 }
1183 #endif
1184
1185 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
1186 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
1187 struct ceph_acl_sec_ctx *ctx);
ceph_security_invalidate_secctx(struct inode * inode)1188 static inline void ceph_security_invalidate_secctx(struct inode *inode)
1189 {
1190 security_inode_invalidate_secctx(inode);
1191 }
1192 #else
ceph_security_init_secctx(struct dentry * dentry,umode_t mode,struct ceph_acl_sec_ctx * ctx)1193 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
1194 struct ceph_acl_sec_ctx *ctx)
1195 {
1196 return 0;
1197 }
ceph_security_invalidate_secctx(struct inode * inode)1198 static inline void ceph_security_invalidate_secctx(struct inode *inode)
1199 {
1200 }
1201 #endif
1202
1203 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
1204
1205 /* acl.c */
1206 #ifdef CONFIG_CEPH_FS_POSIX_ACL
1207
1208 struct posix_acl *ceph_get_acl(struct inode *, int, bool);
1209 int ceph_set_acl(struct mnt_idmap *idmap,
1210 struct dentry *dentry, struct posix_acl *acl, int type);
1211 int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1212 struct ceph_acl_sec_ctx *as_ctx);
1213 void ceph_init_inode_acls(struct inode *inode,
1214 struct ceph_acl_sec_ctx *as_ctx);
1215
ceph_forget_all_cached_acls(struct inode * inode)1216 static inline void ceph_forget_all_cached_acls(struct inode *inode)
1217 {
1218 forget_all_cached_acls(inode);
1219 }
1220
1221 #else
1222
1223 #define ceph_get_acl NULL
1224 #define ceph_set_acl NULL
1225
ceph_pre_init_acls(struct inode * dir,umode_t * mode,struct ceph_acl_sec_ctx * as_ctx)1226 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1227 struct ceph_acl_sec_ctx *as_ctx)
1228 {
1229 return 0;
1230 }
ceph_init_inode_acls(struct inode * inode,struct ceph_acl_sec_ctx * as_ctx)1231 static inline void ceph_init_inode_acls(struct inode *inode,
1232 struct ceph_acl_sec_ctx *as_ctx)
1233 {
1234 }
1235
ceph_forget_all_cached_acls(struct inode * inode)1236 static inline void ceph_forget_all_cached_acls(struct inode *inode)
1237 {
1238 }
1239
1240 #endif
1241
1242 /* caps.c */
1243 extern const char *ceph_cap_string(int c);
1244 extern void ceph_handle_caps(struct ceph_mds_session *session,
1245 struct ceph_msg *msg);
1246 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
1247 struct ceph_cap_reservation *ctx);
1248 extern void ceph_add_cap(struct inode *inode,
1249 struct ceph_mds_session *session, u64 cap_id,
1250 unsigned issued, unsigned wanted,
1251 unsigned cap, unsigned seq, u64 realmino, int flags,
1252 struct ceph_cap **new_cap);
1253 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
1254 extern void ceph_remove_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
1255 bool queue_release);
1256 extern void __ceph_remove_caps(struct ceph_inode_info *ci);
1257 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
1258 struct ceph_cap *cap);
1259 extern int ceph_is_any_caps(struct inode *inode);
1260
1261 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
1262 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
1263 int datasync);
1264 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
1265 struct ceph_mds_session *session);
1266 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
1267 struct ceph_mds_session *session);
1268 void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session,
1269 struct ceph_inode_info *ci);
1270 extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci,
1271 int mds);
1272 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
1273 int mds);
1274 extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps,
1275 bool snap_rwsem_locked);
1276 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
1277 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
1278 extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had);
1279 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
1280 struct ceph_snap_context *snapc);
1281 extern void __ceph_remove_capsnap(struct inode *inode,
1282 struct ceph_cap_snap *capsnap,
1283 bool *wake_ci, bool *wake_mdsc);
1284 extern void ceph_remove_capsnap(struct inode *inode,
1285 struct ceph_cap_snap *capsnap,
1286 bool *wake_ci, bool *wake_mdsc);
1287 extern void ceph_flush_snaps(struct ceph_inode_info *ci,
1288 struct ceph_mds_session **psession);
1289 extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
1290 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags);
1291 extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
1292 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
1293 extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc);
1294 extern int ceph_drop_caps_for_unlink(struct inode *inode);
1295 extern int ceph_encode_inode_release(void **p, struct inode *inode,
1296 int mds, int drop, int unless, int force);
1297 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
1298 struct inode *dir,
1299 int mds, int drop, int unless);
1300
1301 extern int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi,
1302 int need, int want, loff_t endoff, int *got);
1303 extern int ceph_get_caps(struct file *filp, int need, int want,
1304 loff_t endoff, int *got);
1305 extern int ceph_try_get_caps(struct inode *inode,
1306 int need, int want, bool nonblock, int *got);
1307
1308 /* for counting open files by mode */
1309 extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count);
1310 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count);
1311 extern void __ceph_touch_fmode(struct ceph_inode_info *ci,
1312 struct ceph_mds_client *mdsc, int fmode);
1313
1314 /* addr.c */
1315 extern const struct address_space_operations ceph_aops;
1316 extern const struct netfs_request_ops ceph_netfs_ops;
1317 int ceph_mmap_prepare(struct vm_area_desc *desc);
1318 extern int ceph_uninline_data(struct file *file);
1319 extern int ceph_pool_perm_check(struct inode *inode, int need);
1320 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
1321 int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate);
1322
ceph_has_inline_data(struct ceph_inode_info * ci)1323 static inline bool ceph_has_inline_data(struct ceph_inode_info *ci)
1324 {
1325 if (ci->i_inline_version == CEPH_INLINE_NONE ||
1326 ci->i_inline_version == 1) /* initial version, no data */
1327 return false;
1328 return true;
1329 }
1330
1331 /* file.c */
1332 extern const struct file_operations ceph_file_fops;
1333
1334 extern int ceph_renew_caps(struct inode *inode, int fmode);
1335 extern int ceph_open(struct inode *inode, struct file *file);
1336 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
1337 struct file *file, unsigned flags, umode_t mode);
1338 extern ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos,
1339 struct iov_iter *to, int *retry_op,
1340 u64 *last_objver);
1341 extern int ceph_release(struct inode *inode, struct file *filp);
1342 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
1343 char *data, size_t len);
1344
1345 /* dir.c */
1346 extern const struct file_operations ceph_dir_fops;
1347 extern const struct file_operations ceph_snapdir_fops;
1348 extern const struct inode_operations ceph_dir_iops;
1349 extern const struct inode_operations ceph_snapdir_iops;
1350 extern const struct dentry_operations ceph_dentry_ops;
1351
1352 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
1353 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
1354 extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
1355 struct dentry *dentry);
1356 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
1357 struct dentry *dentry, int err);
1358
1359 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
1360 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
1361 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
1362 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
1363 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
1364 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
1365
1366 /* ioctl.c */
1367 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1368
1369 /* export.c */
1370 extern const struct export_operations ceph_export_ops;
1371 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
1372
1373 /* locks.c */
1374 extern __init void ceph_flock_init(void);
1375 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
1376 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
1377 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
1378 extern int ceph_encode_locks_to_buffer(struct inode *inode,
1379 struct ceph_filelock *flocks,
1380 int num_fcntl_locks,
1381 int num_flock_locks);
1382 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
1383 struct ceph_pagelist *pagelist,
1384 int num_fcntl_locks, int num_flock_locks);
1385
1386 /* debugfs.c */
1387 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
1388 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
1389
1390 /* quota.c */
1391
1392 enum quota_get_realm {
1393 QUOTA_GET_MAX_FILES,
1394 QUOTA_GET_MAX_BYTES,
1395 QUOTA_GET_ANY
1396 };
1397
__ceph_has_quota(struct ceph_inode_info * ci,enum quota_get_realm which)1398 static inline bool __ceph_has_quota(struct ceph_inode_info *ci,
1399 enum quota_get_realm which)
1400 {
1401 bool has_quota = false;
1402
1403 switch (which) {
1404 case QUOTA_GET_MAX_BYTES:
1405 has_quota = !!ci->i_max_bytes;
1406 break;
1407 case QUOTA_GET_MAX_FILES:
1408 has_quota = !!ci->i_max_files;
1409 break;
1410 default:
1411 has_quota = !!(ci->i_max_files || ci->i_max_bytes);
1412 }
1413 return has_quota;
1414 }
1415
1416 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
1417
__ceph_update_quota(struct ceph_inode_info * ci,u64 max_bytes,u64 max_files)1418 static inline void __ceph_update_quota(struct ceph_inode_info *ci,
1419 u64 max_bytes, u64 max_files)
1420 {
1421 bool had_quota, has_quota;
1422 had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY);
1423 ci->i_max_bytes = max_bytes;
1424 ci->i_max_files = max_files;
1425 has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY);
1426
1427 if (had_quota != has_quota)
1428 ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota);
1429 }
1430
__ceph_sparse_read_ext_count(struct inode * inode,u64 len)1431 static inline int __ceph_sparse_read_ext_count(struct inode *inode, u64 len)
1432 {
1433 int cnt = 0;
1434
1435 if (IS_ENCRYPTED(inode)) {
1436 cnt = len >> CEPH_FSCRYPT_BLOCK_SHIFT;
1437 if (cnt > CEPH_SPARSE_EXT_ARRAY_INITIAL)
1438 cnt = 0;
1439 }
1440
1441 return cnt;
1442 }
1443
1444 extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
1445 struct ceph_mds_session *session,
1446 struct ceph_msg *msg);
1447 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
1448 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
1449 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
1450 loff_t newlen);
1451 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
1452 loff_t newlen);
1453 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
1454 struct kstatfs *buf);
1455 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
1456
1457 bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc,
1458 struct ceph_mds_session *session);
1459 void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc);
1460 bool ceph_inc_osd_stopping_blocker(struct ceph_mds_client *mdsc);
1461 void ceph_dec_osd_stopping_blocker(struct ceph_mds_client *mdsc);
1462 #endif /* _FS_CEPH_SUPER_H */
1463