1
2
3#include <linux/ceph/ceph_debug.h>
4
5#include <linux/backing-dev.h>
6#include <linux/ctype.h>
7#include <linux/fs.h>
8#include <linux/inet.h>
9#include <linux/in6.h>
10#include <linux/module.h>
11#include <linux/mount.h>
12#include <linux/fs_context.h>
13#include <linux/fs_parser.h>
14#include <linux/sched.h>
15#include <linux/seq_file.h>
16#include <linux/slab.h>
17#include <linux/statfs.h>
18#include <linux/string.h>
19
20#include "super.h"
21#include "mds_client.h"
22#include "cache.h"
23
24#include <linux/ceph/ceph_features.h>
25#include <linux/ceph/decode.h>
26#include <linux/ceph/mon_client.h>
27#include <linux/ceph/auth.h>
28#include <linux/ceph/debugfs.h>
29
30#include <uapi/linux/magic.h>
31
32static DEFINE_SPINLOCK(ceph_fsc_lock);
33static LIST_HEAD(ceph_fsc_list);
34
35
36
37
38
39
40
41
42
43
44static void ceph_put_super(struct super_block *s)
45{
46 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
47
48 dout("put_super\n");
49 ceph_mdsc_close_sessions(fsc->mdsc);
50}
51
52static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
53{
54 struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));
55 struct ceph_mon_client *monc = &fsc->client->monc;
56 struct ceph_statfs st;
57 int i, err;
58 u64 data_pool;
59
60 if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) {
61 data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0];
62 } else {
63 data_pool = CEPH_NOPOOL;
64 }
65
66 dout("statfs\n");
67 err = ceph_monc_do_statfs(monc, data_pool, &st);
68 if (err < 0)
69 return err;
70
71
72 buf->f_type = CEPH_SUPER_MAGIC;
73
74
75
76
77
78
79
80
81
82
83 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
84 buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
85
86
87
88
89
90
91 if (ceph_test_mount_opt(fsc, NOQUOTADF) ||
92 !ceph_quota_update_statfs(fsc, buf)) {
93 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
94 buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
95 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
96 }
97
98 buf->f_files = le64_to_cpu(st.num_objects);
99 buf->f_ffree = -1;
100 buf->f_namelen = NAME_MAX;
101
102
103 buf->f_fsid.val[0] = 0;
104 mutex_lock(&monc->mutex);
105 for (i = 0 ; i < sizeof(monc->monmap->fsid) / sizeof(__le32) ; ++i)
106 buf->f_fsid.val[0] ^= le32_to_cpu(((__le32 *)&monc->monmap->fsid)[i]);
107 mutex_unlock(&monc->mutex);
108
109
110 buf->f_fsid.val[1] = monc->fs_cluster_id;
111
112 return 0;
113}
114
115static int ceph_sync_fs(struct super_block *sb, int wait)
116{
117 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
118
119 if (!wait) {
120 dout("sync_fs (non-blocking)\n");
121 ceph_flush_dirty_caps(fsc->mdsc);
122 dout("sync_fs (non-blocking) done\n");
123 return 0;
124 }
125
126 dout("sync_fs (blocking)\n");
127 ceph_osdc_sync(&fsc->client->osdc);
128 ceph_mdsc_sync(fsc->mdsc);
129 dout("sync_fs (blocking) done\n");
130 return 0;
131}
132
133
134
135
136enum {
137 Opt_wsize,
138 Opt_rsize,
139 Opt_rasize,
140 Opt_caps_wanted_delay_min,
141 Opt_caps_wanted_delay_max,
142 Opt_caps_max,
143 Opt_readdir_max_entries,
144 Opt_readdir_max_bytes,
145 Opt_congestion_kb,
146
147 Opt_snapdirname,
148 Opt_mds_namespace,
149 Opt_recover_session,
150 Opt_source,
151 Opt_mon_addr,
152
153 Opt_dirstat,
154 Opt_rbytes,
155 Opt_asyncreaddir,
156 Opt_dcache,
157 Opt_ino32,
158 Opt_fscache,
159 Opt_poolperm,
160 Opt_require_active_mds,
161 Opt_acl,
162 Opt_quotadf,
163 Opt_copyfrom,
164 Opt_wsync,
165 Opt_pagecache,
166};
167
168enum ceph_recover_session_mode {
169 ceph_recover_session_no,
170 ceph_recover_session_clean
171};
172
173static const struct constant_table ceph_param_recover[] = {
174 { "no", ceph_recover_session_no },
175 { "clean", ceph_recover_session_clean },
176 {}
177};
178
179static const struct fs_parameter_spec ceph_mount_parameters[] = {
180 fsparam_flag_no ("acl", Opt_acl),
181 fsparam_flag_no ("asyncreaddir", Opt_asyncreaddir),
182 fsparam_s32 ("caps_max", Opt_caps_max),
183 fsparam_u32 ("caps_wanted_delay_max", Opt_caps_wanted_delay_max),
184 fsparam_u32 ("caps_wanted_delay_min", Opt_caps_wanted_delay_min),
185 fsparam_u32 ("write_congestion_kb", Opt_congestion_kb),
186 fsparam_flag_no ("copyfrom", Opt_copyfrom),
187 fsparam_flag_no ("dcache", Opt_dcache),
188 fsparam_flag_no ("dirstat", Opt_dirstat),
189 fsparam_flag_no ("fsc", Opt_fscache),
190 fsparam_string ("fsc", Opt_fscache),
191 fsparam_flag_no ("ino32", Opt_ino32),
192 fsparam_string ("mds_namespace", Opt_mds_namespace),
193 fsparam_flag_no ("poolperm", Opt_poolperm),
194 fsparam_flag_no ("quotadf", Opt_quotadf),
195 fsparam_u32 ("rasize", Opt_rasize),
196 fsparam_flag_no ("rbytes", Opt_rbytes),
197 fsparam_u32 ("readdir_max_bytes", Opt_readdir_max_bytes),
198 fsparam_u32 ("readdir_max_entries", Opt_readdir_max_entries),
199 fsparam_enum ("recover_session", Opt_recover_session, ceph_param_recover),
200 fsparam_flag_no ("require_active_mds", Opt_require_active_mds),
201 fsparam_u32 ("rsize", Opt_rsize),
202 fsparam_string ("snapdirname", Opt_snapdirname),
203 fsparam_string ("source", Opt_source),
204 fsparam_string ("mon_addr", Opt_mon_addr),
205 fsparam_u32 ("wsize", Opt_wsize),
206 fsparam_flag_no ("wsync", Opt_wsync),
207 fsparam_flag_no ("pagecache", Opt_pagecache),
208 {}
209};
210
211struct ceph_parse_opts_ctx {
212 struct ceph_options *copts;
213 struct ceph_mount_options *opts;
214};
215
216
217
218
219
220
221
222static void canonicalize_path(char *path)
223{
224 int i, j = 0;
225
226 for (i = 0; path[i] != '\0'; i++) {
227 if (path[i] != '/' || j < 1 || path[j - 1] != '/')
228 path[j++] = path[i];
229 }
230
231 if (j > 1 && path[j - 1] == '/')
232 j--;
233 path[j] = '\0';
234}
235
236
237
238
239
240
241
242static int namespace_equals(struct ceph_mount_options *fsopt,
243 const char *namespace, size_t len)
244{
245 return !(fsopt->mds_namespace &&
246 (strlen(fsopt->mds_namespace) != len ||
247 strncmp(fsopt->mds_namespace, namespace, len)));
248}
249
250static int ceph_parse_old_source(const char *dev_name, const char *dev_name_end,
251 struct fs_context *fc)
252{
253 int r;
254 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
255 struct ceph_mount_options *fsopt = pctx->opts;
256
257 if (*dev_name_end != ':')
258 return invalfc(fc, "separator ':' missing in source");
259
260 r = ceph_parse_mon_ips(dev_name, dev_name_end - dev_name,
261 pctx->copts, fc->log.log, ',');
262 if (r)
263 return r;
264
265 fsopt->new_dev_syntax = false;
266 return 0;
267}
268
269static int ceph_parse_new_source(const char *dev_name, const char *dev_name_end,
270 struct fs_context *fc)
271{
272 size_t len;
273 struct ceph_fsid fsid;
274 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
275 struct ceph_mount_options *fsopt = pctx->opts;
276 char *fsid_start, *fs_name_start;
277
278 if (*dev_name_end != '=') {
279 dout("separator '=' missing in source");
280 return -EINVAL;
281 }
282
283 fsid_start = strchr(dev_name, '@');
284 if (!fsid_start)
285 return invalfc(fc, "missing cluster fsid");
286 ++fsid_start;
287
288 fs_name_start = strchr(fsid_start, '.');
289 if (!fs_name_start)
290 return invalfc(fc, "missing file system name");
291
292 if (ceph_parse_fsid(fsid_start, &fsid))
293 return invalfc(fc, "Invalid FSID");
294
295 ++fs_name_start;
296 len = dev_name_end - fs_name_start;
297
298 if (!namespace_equals(fsopt, fs_name_start, len))
299 return invalfc(fc, "Mismatching mds_namespace");
300 kfree(fsopt->mds_namespace);
301 fsopt->mds_namespace = kstrndup(fs_name_start, len, GFP_KERNEL);
302 if (!fsopt->mds_namespace)
303 return -ENOMEM;
304 dout("file system (mds namespace) '%s'\n", fsopt->mds_namespace);
305
306 fsopt->new_dev_syntax = true;
307 return 0;
308}
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc)
329{
330 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
331 struct ceph_mount_options *fsopt = pctx->opts;
332 char *dev_name = param->string, *dev_name_end;
333 int ret;
334
335 dout("%s '%s'\n", __func__, dev_name);
336 if (!dev_name || !*dev_name)
337 return invalfc(fc, "Empty source");
338
339 dev_name_end = strchr(dev_name, '/');
340 if (dev_name_end) {
341
342
343
344
345 kfree(fsopt->server_path);
346 fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL);
347 if (!fsopt->server_path)
348 return -ENOMEM;
349
350 canonicalize_path(fsopt->server_path);
351 } else {
352 dev_name_end = dev_name + strlen(dev_name);
353 }
354
355 dev_name_end--;
356 if (dev_name_end < dev_name)
357 return invalfc(fc, "Path missing in source");
358
359 dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
360 if (fsopt->server_path)
361 dout("server path '%s'\n", fsopt->server_path);
362
363 dout("trying new device syntax");
364 ret = ceph_parse_new_source(dev_name, dev_name_end, fc);
365 if (ret) {
366 if (ret != -EINVAL)
367 return ret;
368 dout("trying old device syntax");
369 ret = ceph_parse_old_source(dev_name, dev_name_end, fc);
370 if (ret)
371 return ret;
372 }
373
374 fc->source = param->string;
375 param->string = NULL;
376 return 0;
377}
378
379static int ceph_parse_mon_addr(struct fs_parameter *param,
380 struct fs_context *fc)
381{
382 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
383 struct ceph_mount_options *fsopt = pctx->opts;
384
385 kfree(fsopt->mon_addr);
386 fsopt->mon_addr = param->string;
387 param->string = NULL;
388
389 return ceph_parse_mon_ips(fsopt->mon_addr, strlen(fsopt->mon_addr),
390 pctx->copts, fc->log.log, '/');
391}
392
393static int ceph_parse_mount_param(struct fs_context *fc,
394 struct fs_parameter *param)
395{
396 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
397 struct ceph_mount_options *fsopt = pctx->opts;
398 struct fs_parse_result result;
399 unsigned int mode;
400 int token, ret;
401
402 ret = ceph_parse_param(param, pctx->copts, fc->log.log);
403 if (ret != -ENOPARAM)
404 return ret;
405
406 token = fs_parse(fc, ceph_mount_parameters, param, &result);
407 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
408 if (token < 0)
409 return token;
410
411 switch (token) {
412 case Opt_snapdirname:
413 kfree(fsopt->snapdir_name);
414 fsopt->snapdir_name = param->string;
415 param->string = NULL;
416 break;
417 case Opt_mds_namespace:
418 if (!namespace_equals(fsopt, param->string, strlen(param->string)))
419 return invalfc(fc, "Mismatching mds_namespace");
420 kfree(fsopt->mds_namespace);
421 fsopt->mds_namespace = param->string;
422 param->string = NULL;
423 break;
424 case Opt_recover_session:
425 mode = result.uint_32;
426 if (mode == ceph_recover_session_no)
427 fsopt->flags &= ~CEPH_MOUNT_OPT_CLEANRECOVER;
428 else if (mode == ceph_recover_session_clean)
429 fsopt->flags |= CEPH_MOUNT_OPT_CLEANRECOVER;
430 else
431 BUG();
432 break;
433 case Opt_source:
434 if (fc->source)
435 return invalfc(fc, "Multiple sources specified");
436 return ceph_parse_source(param, fc);
437 case Opt_mon_addr:
438 return ceph_parse_mon_addr(param, fc);
439 case Opt_wsize:
440 if (result.uint_32 < PAGE_SIZE ||
441 result.uint_32 > CEPH_MAX_WRITE_SIZE)
442 goto out_of_range;
443 fsopt->wsize = ALIGN(result.uint_32, PAGE_SIZE);
444 break;
445 case Opt_rsize:
446 if (result.uint_32 < PAGE_SIZE ||
447 result.uint_32 > CEPH_MAX_READ_SIZE)
448 goto out_of_range;
449 fsopt->rsize = ALIGN(result.uint_32, PAGE_SIZE);
450 break;
451 case Opt_rasize:
452 fsopt->rasize = ALIGN(result.uint_32, PAGE_SIZE);
453 break;
454 case Opt_caps_wanted_delay_min:
455 if (result.uint_32 < 1)
456 goto out_of_range;
457 fsopt->caps_wanted_delay_min = result.uint_32;
458 break;
459 case Opt_caps_wanted_delay_max:
460 if (result.uint_32 < 1)
461 goto out_of_range;
462 fsopt->caps_wanted_delay_max = result.uint_32;
463 break;
464 case Opt_caps_max:
465 if (result.int_32 < 0)
466 goto out_of_range;
467 fsopt->caps_max = result.int_32;
468 break;
469 case Opt_readdir_max_entries:
470 if (result.uint_32 < 1)
471 goto out_of_range;
472 fsopt->max_readdir = result.uint_32;
473 break;
474 case Opt_readdir_max_bytes:
475 if (result.uint_32 < PAGE_SIZE && result.uint_32 != 0)
476 goto out_of_range;
477 fsopt->max_readdir_bytes = result.uint_32;
478 break;
479 case Opt_congestion_kb:
480 if (result.uint_32 < 1024)
481 goto out_of_range;
482 fsopt->congestion_kb = result.uint_32;
483 break;
484 case Opt_dirstat:
485 if (!result.negated)
486 fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
487 else
488 fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
489 break;
490 case Opt_rbytes:
491 if (!result.negated)
492 fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
493 else
494 fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
495 break;
496 case Opt_asyncreaddir:
497 if (!result.negated)
498 fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
499 else
500 fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
501 break;
502 case Opt_dcache:
503 if (!result.negated)
504 fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
505 else
506 fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
507 break;
508 case Opt_ino32:
509 if (!result.negated)
510 fsopt->flags |= CEPH_MOUNT_OPT_INO32;
511 else
512 fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
513 break;
514
515 case Opt_fscache:
516#ifdef CONFIG_CEPH_FSCACHE
517 kfree(fsopt->fscache_uniq);
518 fsopt->fscache_uniq = NULL;
519 if (result.negated) {
520 fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE;
521 } else {
522 fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
523 fsopt->fscache_uniq = param->string;
524 param->string = NULL;
525 }
526 break;
527#else
528 return invalfc(fc, "fscache support is disabled");
529#endif
530 case Opt_poolperm:
531 if (!result.negated)
532 fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM;
533 else
534 fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM;
535 break;
536 case Opt_require_active_mds:
537 if (!result.negated)
538 fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT;
539 else
540 fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT;
541 break;
542 case Opt_quotadf:
543 if (!result.negated)
544 fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF;
545 else
546 fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF;
547 break;
548 case Opt_copyfrom:
549 if (!result.negated)
550 fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM;
551 else
552 fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM;
553 break;
554 case Opt_acl:
555 if (!result.negated) {
556#ifdef CONFIG_CEPH_FS_POSIX_ACL
557 fc->sb_flags |= SB_POSIXACL;
558#else
559 return invalfc(fc, "POSIX ACL support is disabled");
560#endif
561 } else {
562 fc->sb_flags &= ~SB_POSIXACL;
563 }
564 break;
565 case Opt_wsync:
566 if (!result.negated)
567 fsopt->flags &= ~CEPH_MOUNT_OPT_ASYNC_DIROPS;
568 else
569 fsopt->flags |= CEPH_MOUNT_OPT_ASYNC_DIROPS;
570 break;
571 case Opt_pagecache:
572 if (result.negated)
573 fsopt->flags |= CEPH_MOUNT_OPT_NOPAGECACHE;
574 else
575 fsopt->flags &= ~CEPH_MOUNT_OPT_NOPAGECACHE;
576 break;
577 default:
578 BUG();
579 }
580 return 0;
581
582out_of_range:
583 return invalfc(fc, "%s out of range", param->key);
584}
585
586static void destroy_mount_options(struct ceph_mount_options *args)
587{
588 dout("destroy_mount_options %p\n", args);
589 if (!args)
590 return;
591
592 kfree(args->snapdir_name);
593 kfree(args->mds_namespace);
594 kfree(args->server_path);
595 kfree(args->fscache_uniq);
596 kfree(args->mon_addr);
597 kfree(args);
598}
599
600static int strcmp_null(const char *s1, const char *s2)
601{
602 if (!s1 && !s2)
603 return 0;
604 if (s1 && !s2)
605 return -1;
606 if (!s1 && s2)
607 return 1;
608 return strcmp(s1, s2);
609}
610
611static int compare_mount_options(struct ceph_mount_options *new_fsopt,
612 struct ceph_options *new_opt,
613 struct ceph_fs_client *fsc)
614{
615 struct ceph_mount_options *fsopt1 = new_fsopt;
616 struct ceph_mount_options *fsopt2 = fsc->mount_options;
617 int ofs = offsetof(struct ceph_mount_options, snapdir_name);
618 int ret;
619
620 ret = memcmp(fsopt1, fsopt2, ofs);
621 if (ret)
622 return ret;
623
624 ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
625 if (ret)
626 return ret;
627
628 ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace);
629 if (ret)
630 return ret;
631
632 ret = strcmp_null(fsopt1->server_path, fsopt2->server_path);
633 if (ret)
634 return ret;
635
636 ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq);
637 if (ret)
638 return ret;
639
640 ret = strcmp_null(fsopt1->mon_addr, fsopt2->mon_addr);
641 if (ret)
642 return ret;
643
644 return ceph_compare_options(new_opt, fsc->client);
645}
646
647
648
649
650
651
652static int ceph_show_options(struct seq_file *m, struct dentry *root)
653{
654 struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
655 struct ceph_mount_options *fsopt = fsc->mount_options;
656 size_t pos;
657 int ret;
658
659
660 seq_putc(m, ',');
661 pos = m->count;
662
663 ret = ceph_print_client_options(m, fsc->client, false);
664 if (ret)
665 return ret;
666
667
668 if (m->count == pos)
669 m->count--;
670
671 if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
672 seq_puts(m, ",dirstat");
673 if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES))
674 seq_puts(m, ",rbytes");
675 if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
676 seq_puts(m, ",noasyncreaddir");
677 if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0)
678 seq_puts(m, ",nodcache");
679 if (fsopt->flags & CEPH_MOUNT_OPT_INO32)
680 seq_puts(m, ",ino32");
681 if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) {
682 seq_show_option(m, "fsc", fsopt->fscache_uniq);
683 }
684 if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM)
685 seq_puts(m, ",nopoolperm");
686 if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF)
687 seq_puts(m, ",noquotadf");
688
689#ifdef CONFIG_CEPH_FS_POSIX_ACL
690 if (root->d_sb->s_flags & SB_POSIXACL)
691 seq_puts(m, ",acl");
692 else
693 seq_puts(m, ",noacl");
694#endif
695
696 if ((fsopt->flags & CEPH_MOUNT_OPT_NOCOPYFROM) == 0)
697 seq_puts(m, ",copyfrom");
698
699
700 if (fsopt->mds_namespace && !fsopt->new_dev_syntax)
701 seq_show_option(m, "mds_namespace", fsopt->mds_namespace);
702
703 if (fsopt->mon_addr)
704 seq_printf(m, ",mon_addr=%s", fsopt->mon_addr);
705
706 if (fsopt->flags & CEPH_MOUNT_OPT_CLEANRECOVER)
707 seq_show_option(m, "recover_session", "clean");
708
709 if (!(fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS))
710 seq_puts(m, ",wsync");
711
712 if (fsopt->flags & CEPH_MOUNT_OPT_NOPAGECACHE)
713 seq_puts(m, ",nopagecache");
714
715 if (fsopt->wsize != CEPH_MAX_WRITE_SIZE)
716 seq_printf(m, ",wsize=%u", fsopt->wsize);
717 if (fsopt->rsize != CEPH_MAX_READ_SIZE)
718 seq_printf(m, ",rsize=%u", fsopt->rsize);
719 if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
720 seq_printf(m, ",rasize=%u", fsopt->rasize);
721 if (fsopt->congestion_kb != default_congestion_kb())
722 seq_printf(m, ",write_congestion_kb=%u", fsopt->congestion_kb);
723 if (fsopt->caps_max)
724 seq_printf(m, ",caps_max=%d", fsopt->caps_max);
725 if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
726 seq_printf(m, ",caps_wanted_delay_min=%u",
727 fsopt->caps_wanted_delay_min);
728 if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
729 seq_printf(m, ",caps_wanted_delay_max=%u",
730 fsopt->caps_wanted_delay_max);
731 if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
732 seq_printf(m, ",readdir_max_entries=%u", fsopt->max_readdir);
733 if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
734 seq_printf(m, ",readdir_max_bytes=%u", fsopt->max_readdir_bytes);
735 if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
736 seq_show_option(m, "snapdirname", fsopt->snapdir_name);
737
738 return 0;
739}
740
741
742
743
744
745static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
746{
747 struct ceph_fs_client *fsc = client->private;
748 int type = le16_to_cpu(msg->hdr.type);
749
750 switch (type) {
751 case CEPH_MSG_MDS_MAP:
752 ceph_mdsc_handle_mdsmap(fsc->mdsc, msg);
753 return 0;
754 case CEPH_MSG_FS_MAP_USER:
755 ceph_mdsc_handle_fsmap(fsc->mdsc, msg);
756 return 0;
757 default:
758 return -1;
759 }
760}
761
762
763
764
765
766
767static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
768 struct ceph_options *opt)
769{
770 struct ceph_fs_client *fsc;
771 int err;
772
773 fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
774 if (!fsc) {
775 err = -ENOMEM;
776 goto fail;
777 }
778
779 fsc->client = ceph_create_client(opt, fsc);
780 if (IS_ERR(fsc->client)) {
781 err = PTR_ERR(fsc->client);
782 goto fail;
783 }
784 opt = NULL;
785
786 fsc->client->extra_mon_dispatch = extra_mon_dispatch;
787 ceph_set_opt(fsc->client, ABORT_ON_FULL);
788
789 if (!fsopt->mds_namespace) {
790 ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
791 0, true);
792 } else {
793 ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP,
794 0, false);
795 }
796
797 fsc->mount_options = fsopt;
798
799 fsc->sb = NULL;
800 fsc->mount_state = CEPH_MOUNT_MOUNTING;
801 fsc->filp_gen = 1;
802 fsc->have_copy_from2 = true;
803
804 atomic_long_set(&fsc->writeback_count, 0);
805 fsc->write_congested = false;
806
807 err = -ENOMEM;
808
809
810
811
812 fsc->inode_wq = alloc_workqueue("ceph-inode", WQ_UNBOUND, 0);
813 if (!fsc->inode_wq)
814 goto fail_client;
815 fsc->cap_wq = alloc_workqueue("ceph-cap", 0, 1);
816 if (!fsc->cap_wq)
817 goto fail_inode_wq;
818
819 spin_lock(&ceph_fsc_lock);
820 list_add_tail(&fsc->metric_wakeup, &ceph_fsc_list);
821 spin_unlock(&ceph_fsc_lock);
822
823 return fsc;
824
825fail_inode_wq:
826 destroy_workqueue(fsc->inode_wq);
827fail_client:
828 ceph_destroy_client(fsc->client);
829fail:
830 kfree(fsc);
831 if (opt)
832 ceph_destroy_options(opt);
833 destroy_mount_options(fsopt);
834 return ERR_PTR(err);
835}
836
837static void flush_fs_workqueues(struct ceph_fs_client *fsc)
838{
839 flush_workqueue(fsc->inode_wq);
840 flush_workqueue(fsc->cap_wq);
841}
842
843static void destroy_fs_client(struct ceph_fs_client *fsc)
844{
845 dout("destroy_fs_client %p\n", fsc);
846
847 spin_lock(&ceph_fsc_lock);
848 list_del(&fsc->metric_wakeup);
849 spin_unlock(&ceph_fsc_lock);
850
851 ceph_mdsc_destroy(fsc);
852 destroy_workqueue(fsc->inode_wq);
853 destroy_workqueue(fsc->cap_wq);
854
855 destroy_mount_options(fsc->mount_options);
856
857 ceph_destroy_client(fsc->client);
858
859 kfree(fsc);
860 dout("destroy_fs_client %p done\n", fsc);
861}
862
863
864
865
866struct kmem_cache *ceph_inode_cachep;
867struct kmem_cache *ceph_cap_cachep;
868struct kmem_cache *ceph_cap_snap_cachep;
869struct kmem_cache *ceph_cap_flush_cachep;
870struct kmem_cache *ceph_dentry_cachep;
871struct kmem_cache *ceph_file_cachep;
872struct kmem_cache *ceph_dir_file_cachep;
873struct kmem_cache *ceph_mds_request_cachep;
874mempool_t *ceph_wb_pagevec_pool;
875
876static void ceph_inode_init_once(void *foo)
877{
878 struct ceph_inode_info *ci = foo;
879 inode_init_once(&ci->netfs.inode);
880}
881
882static int __init init_caches(void)
883{
884 int error = -ENOMEM;
885
886 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
887 sizeof(struct ceph_inode_info),
888 __alignof__(struct ceph_inode_info),
889 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
890 SLAB_ACCOUNT, ceph_inode_init_once);
891 if (!ceph_inode_cachep)
892 return -ENOMEM;
893
894 ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD);
895 if (!ceph_cap_cachep)
896 goto bad_cap;
897 ceph_cap_snap_cachep = KMEM_CACHE(ceph_cap_snap, SLAB_MEM_SPREAD);
898 if (!ceph_cap_snap_cachep)
899 goto bad_cap_snap;
900 ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush,
901 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
902 if (!ceph_cap_flush_cachep)
903 goto bad_cap_flush;
904
905 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
906 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
907 if (!ceph_dentry_cachep)
908 goto bad_dentry;
909
910 ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD);
911 if (!ceph_file_cachep)
912 goto bad_file;
913
914 ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD);
915 if (!ceph_dir_file_cachep)
916 goto bad_dir_file;
917
918 ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, SLAB_MEM_SPREAD);
919 if (!ceph_mds_request_cachep)
920 goto bad_mds_req;
921
922 ceph_wb_pagevec_pool = mempool_create_kmalloc_pool(10, CEPH_MAX_WRITE_SIZE >> PAGE_SHIFT);
923 if (!ceph_wb_pagevec_pool)
924 goto bad_pagevec_pool;
925
926 return 0;
927
928bad_pagevec_pool:
929 kmem_cache_destroy(ceph_mds_request_cachep);
930bad_mds_req:
931 kmem_cache_destroy(ceph_dir_file_cachep);
932bad_dir_file:
933 kmem_cache_destroy(ceph_file_cachep);
934bad_file:
935 kmem_cache_destroy(ceph_dentry_cachep);
936bad_dentry:
937 kmem_cache_destroy(ceph_cap_flush_cachep);
938bad_cap_flush:
939 kmem_cache_destroy(ceph_cap_snap_cachep);
940bad_cap_snap:
941 kmem_cache_destroy(ceph_cap_cachep);
942bad_cap:
943 kmem_cache_destroy(ceph_inode_cachep);
944 return error;
945}
946
947static void destroy_caches(void)
948{
949
950
951
952
953 rcu_barrier();
954
955 kmem_cache_destroy(ceph_inode_cachep);
956 kmem_cache_destroy(ceph_cap_cachep);
957 kmem_cache_destroy(ceph_cap_snap_cachep);
958 kmem_cache_destroy(ceph_cap_flush_cachep);
959 kmem_cache_destroy(ceph_dentry_cachep);
960 kmem_cache_destroy(ceph_file_cachep);
961 kmem_cache_destroy(ceph_dir_file_cachep);
962 kmem_cache_destroy(ceph_mds_request_cachep);
963 mempool_destroy(ceph_wb_pagevec_pool);
964}
965
966static void __ceph_umount_begin(struct ceph_fs_client *fsc)
967{
968 ceph_osdc_abort_requests(&fsc->client->osdc, -EIO);
969 ceph_mdsc_force_umount(fsc->mdsc);
970 fsc->filp_gen++;
971}
972
973
974
975
976
977void ceph_umount_begin(struct super_block *sb)
978{
979 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
980
981 dout("ceph_umount_begin - starting forced umount\n");
982 if (!fsc)
983 return;
984 fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
985 __ceph_umount_begin(fsc);
986}
987
988static const struct super_operations ceph_super_ops = {
989 .alloc_inode = ceph_alloc_inode,
990 .free_inode = ceph_free_inode,
991 .write_inode = ceph_write_inode,
992 .drop_inode = generic_delete_inode,
993 .evict_inode = ceph_evict_inode,
994 .sync_fs = ceph_sync_fs,
995 .put_super = ceph_put_super,
996 .show_options = ceph_show_options,
997 .statfs = ceph_statfs,
998 .umount_begin = ceph_umount_begin,
999};
1000
1001
1002
1003
1004
1005static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
1006 const char *path,
1007 unsigned long started)
1008{
1009 struct ceph_mds_client *mdsc = fsc->mdsc;
1010 struct ceph_mds_request *req = NULL;
1011 int err;
1012 struct dentry *root;
1013
1014
1015 dout("open_root_inode opening '%s'\n", path);
1016 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
1017 if (IS_ERR(req))
1018 return ERR_CAST(req);
1019 req->r_path1 = kstrdup(path, GFP_NOFS);
1020 if (!req->r_path1) {
1021 root = ERR_PTR(-ENOMEM);
1022 goto out;
1023 }
1024
1025 req->r_ino1.ino = CEPH_INO_ROOT;
1026 req->r_ino1.snap = CEPH_NOSNAP;
1027 req->r_started = started;
1028 req->r_timeout = fsc->client->options->mount_timeout;
1029 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
1030 req->r_num_caps = 2;
1031 err = ceph_mdsc_do_request(mdsc, NULL, req);
1032 if (err == 0) {
1033 struct inode *inode = req->r_target_inode;
1034 req->r_target_inode = NULL;
1035 dout("open_root_inode success\n");
1036 root = d_make_root(inode);
1037 if (!root) {
1038 root = ERR_PTR(-ENOMEM);
1039 goto out;
1040 }
1041 dout("open_root_inode success, root dentry is %p\n", root);
1042 } else {
1043 root = ERR_PTR(err);
1044 }
1045out:
1046 ceph_mdsc_put_request(req);
1047 return root;
1048}
1049
1050
1051
1052
1053static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
1054 struct fs_context *fc)
1055{
1056 int err;
1057 unsigned long started = jiffies;
1058 struct dentry *root;
1059
1060 dout("mount start %p\n", fsc);
1061 mutex_lock(&fsc->client->mount_mutex);
1062
1063 if (!fsc->sb->s_root) {
1064 const char *path = fsc->mount_options->server_path ?
1065 fsc->mount_options->server_path + 1 : "";
1066
1067 err = __ceph_open_session(fsc->client, started);
1068 if (err < 0)
1069 goto out;
1070
1071
1072 if (fsc->mount_options->flags & CEPH_MOUNT_OPT_FSCACHE) {
1073 err = ceph_fscache_register_fs(fsc, fc);
1074 if (err < 0)
1075 goto out;
1076 }
1077
1078 dout("mount opening path '%s'\n", path);
1079
1080 ceph_fs_debugfs_init(fsc);
1081
1082 root = open_root_dentry(fsc, path, started);
1083 if (IS_ERR(root)) {
1084 err = PTR_ERR(root);
1085 goto out;
1086 }
1087 fsc->sb->s_root = dget(root);
1088 } else {
1089 root = dget(fsc->sb->s_root);
1090 }
1091
1092 fsc->mount_state = CEPH_MOUNT_MOUNTED;
1093 dout("mount success\n");
1094 mutex_unlock(&fsc->client->mount_mutex);
1095 return root;
1096
1097out:
1098 mutex_unlock(&fsc->client->mount_mutex);
1099 return ERR_PTR(err);
1100}
1101
1102static int ceph_set_super(struct super_block *s, struct fs_context *fc)
1103{
1104 struct ceph_fs_client *fsc = s->s_fs_info;
1105 int ret;
1106
1107 dout("set_super %p\n", s);
1108
1109 s->s_maxbytes = MAX_LFS_FILESIZE;
1110
1111 s->s_xattr = ceph_xattr_handlers;
1112 fsc->sb = s;
1113 fsc->max_file_size = 1ULL << 40;
1114
1115 s->s_op = &ceph_super_ops;
1116 s->s_d_op = &ceph_dentry_ops;
1117 s->s_export_op = &ceph_export_ops;
1118
1119 s->s_time_gran = 1;
1120 s->s_time_min = 0;
1121 s->s_time_max = U32_MAX;
1122 s->s_flags |= SB_NODIRATIME | SB_NOATIME;
1123
1124 ret = set_anon_super_fc(s, fc);
1125 if (ret != 0)
1126 fsc->sb = NULL;
1127 return ret;
1128}
1129
1130
1131
1132
1133static int ceph_compare_super(struct super_block *sb, struct fs_context *fc)
1134{
1135 struct ceph_fs_client *new = fc->s_fs_info;
1136 struct ceph_mount_options *fsopt = new->mount_options;
1137 struct ceph_options *opt = new->client->options;
1138 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1139
1140 dout("ceph_compare_super %p\n", sb);
1141
1142 if (compare_mount_options(fsopt, opt, fsc)) {
1143 dout("monitor(s)/mount options don't match\n");
1144 return 0;
1145 }
1146 if ((opt->flags & CEPH_OPT_FSID) &&
1147 ceph_fsid_compare(&opt->fsid, &fsc->client->fsid)) {
1148 dout("fsid doesn't match\n");
1149 return 0;
1150 }
1151 if (fc->sb_flags != (sb->s_flags & ~SB_BORN)) {
1152 dout("flags differ\n");
1153 return 0;
1154 }
1155
1156 if (fsc->blocklisted && !ceph_test_mount_opt(fsc, CLEANRECOVER)) {
1157 dout("client is blocklisted (and CLEANRECOVER is not set)\n");
1158 return 0;
1159 }
1160
1161 if (fsc->mount_state == CEPH_MOUNT_SHUTDOWN) {
1162 dout("client has been forcibly unmounted\n");
1163 return 0;
1164 }
1165
1166 return 1;
1167}
1168
1169
1170
1171
1172static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
1173
1174static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc)
1175{
1176 int err;
1177
1178 err = super_setup_bdi_name(sb, "ceph-%ld",
1179 atomic_long_inc_return(&bdi_seq));
1180 if (err)
1181 return err;
1182
1183
1184 sb->s_bdi->ra_pages = fsc->mount_options->rasize >> PAGE_SHIFT;
1185
1186
1187 sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT;
1188
1189 return 0;
1190}
1191
1192static int ceph_get_tree(struct fs_context *fc)
1193{
1194 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
1195 struct ceph_mount_options *fsopt = pctx->opts;
1196 struct super_block *sb;
1197 struct ceph_fs_client *fsc;
1198 struct dentry *res;
1199 int (*compare_super)(struct super_block *, struct fs_context *) =
1200 ceph_compare_super;
1201 int err;
1202
1203 dout("ceph_get_tree\n");
1204
1205 if (!fc->source)
1206 return invalfc(fc, "No source");
1207 if (fsopt->new_dev_syntax && !fsopt->mon_addr)
1208 return invalfc(fc, "No monitor address");
1209
1210
1211 fsc = create_fs_client(pctx->opts, pctx->copts);
1212 pctx->opts = NULL;
1213 pctx->copts = NULL;
1214 if (IS_ERR(fsc)) {
1215 err = PTR_ERR(fsc);
1216 goto out_final;
1217 }
1218
1219 err = ceph_mdsc_init(fsc);
1220 if (err < 0)
1221 goto out;
1222
1223 if (ceph_test_opt(fsc->client, NOSHARE))
1224 compare_super = NULL;
1225
1226 fc->s_fs_info = fsc;
1227 sb = sget_fc(fc, compare_super, ceph_set_super);
1228 fc->s_fs_info = NULL;
1229 if (IS_ERR(sb)) {
1230 err = PTR_ERR(sb);
1231 goto out;
1232 }
1233
1234 if (ceph_sb_to_client(sb) != fsc) {
1235 destroy_fs_client(fsc);
1236 fsc = ceph_sb_to_client(sb);
1237 dout("get_sb got existing client %p\n", fsc);
1238 } else {
1239 dout("get_sb using new client %p\n", fsc);
1240 err = ceph_setup_bdi(sb, fsc);
1241 if (err < 0)
1242 goto out_splat;
1243 }
1244
1245 res = ceph_real_mount(fsc, fc);
1246 if (IS_ERR(res)) {
1247 err = PTR_ERR(res);
1248 goto out_splat;
1249 }
1250 dout("root %p inode %p ino %llx.%llx\n", res,
1251 d_inode(res), ceph_vinop(d_inode(res)));
1252 fc->root = fsc->sb->s_root;
1253 return 0;
1254
1255out_splat:
1256 if (!ceph_mdsmap_is_cluster_available(fsc->mdsc->mdsmap)) {
1257 pr_info("No mds server is up or the cluster is laggy\n");
1258 err = -EHOSTUNREACH;
1259 }
1260
1261 ceph_mdsc_close_sessions(fsc->mdsc);
1262 deactivate_locked_super(sb);
1263 goto out_final;
1264
1265out:
1266 destroy_fs_client(fsc);
1267out_final:
1268 dout("ceph_get_tree fail %d\n", err);
1269 return err;
1270}
1271
1272static void ceph_free_fc(struct fs_context *fc)
1273{
1274 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
1275
1276 if (pctx) {
1277 destroy_mount_options(pctx->opts);
1278 ceph_destroy_options(pctx->copts);
1279 kfree(pctx);
1280 }
1281}
1282
1283static int ceph_reconfigure_fc(struct fs_context *fc)
1284{
1285 struct ceph_parse_opts_ctx *pctx = fc->fs_private;
1286 struct ceph_mount_options *fsopt = pctx->opts;
1287 struct ceph_fs_client *fsc = ceph_sb_to_client(fc->root->d_sb);
1288
1289 if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS)
1290 ceph_set_mount_opt(fsc, ASYNC_DIROPS);
1291 else
1292 ceph_clear_mount_opt(fsc, ASYNC_DIROPS);
1293
1294 if (strcmp_null(fsc->mount_options->mon_addr, fsopt->mon_addr)) {
1295 kfree(fsc->mount_options->mon_addr);
1296 fsc->mount_options->mon_addr = fsopt->mon_addr;
1297 fsopt->mon_addr = NULL;
1298 pr_notice("ceph: monitor addresses recorded, but not used for reconnection");
1299 }
1300
1301 sync_filesystem(fc->root->d_sb);
1302 return 0;
1303}
1304
1305static const struct fs_context_operations ceph_context_ops = {
1306 .free = ceph_free_fc,
1307 .parse_param = ceph_parse_mount_param,
1308 .get_tree = ceph_get_tree,
1309 .reconfigure = ceph_reconfigure_fc,
1310};
1311
1312
1313
1314
1315static int ceph_init_fs_context(struct fs_context *fc)
1316{
1317 struct ceph_parse_opts_ctx *pctx;
1318 struct ceph_mount_options *fsopt;
1319
1320 pctx = kzalloc(sizeof(*pctx), GFP_KERNEL);
1321 if (!pctx)
1322 return -ENOMEM;
1323
1324 pctx->copts = ceph_alloc_options();
1325 if (!pctx->copts)
1326 goto nomem;
1327
1328 pctx->opts = kzalloc(sizeof(*pctx->opts), GFP_KERNEL);
1329 if (!pctx->opts)
1330 goto nomem;
1331
1332 fsopt = pctx->opts;
1333 fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
1334
1335 fsopt->wsize = CEPH_MAX_WRITE_SIZE;
1336 fsopt->rsize = CEPH_MAX_READ_SIZE;
1337 fsopt->rasize = CEPH_RASIZE_DEFAULT;
1338 fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
1339 if (!fsopt->snapdir_name)
1340 goto nomem;
1341
1342 fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
1343 fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
1344 fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
1345 fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
1346 fsopt->congestion_kb = default_congestion_kb();
1347
1348#ifdef CONFIG_CEPH_FS_POSIX_ACL
1349 fc->sb_flags |= SB_POSIXACL;
1350#endif
1351
1352 fc->fs_private = pctx;
1353 fc->ops = &ceph_context_ops;
1354 return 0;
1355
1356nomem:
1357 destroy_mount_options(pctx->opts);
1358 ceph_destroy_options(pctx->copts);
1359 kfree(pctx);
1360 return -ENOMEM;
1361}
1362
1363static void ceph_kill_sb(struct super_block *s)
1364{
1365 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
1366
1367 dout("kill_sb %p\n", s);
1368
1369 ceph_mdsc_pre_umount(fsc->mdsc);
1370 flush_fs_workqueues(fsc);
1371
1372 kill_anon_super(s);
1373
1374 fsc->client->extra_mon_dispatch = NULL;
1375 ceph_fs_debugfs_cleanup(fsc);
1376
1377 ceph_fscache_unregister_fs(fsc);
1378
1379 destroy_fs_client(fsc);
1380}
1381
1382static struct file_system_type ceph_fs_type = {
1383 .owner = THIS_MODULE,
1384 .name = "ceph",
1385 .init_fs_context = ceph_init_fs_context,
1386 .kill_sb = ceph_kill_sb,
1387 .fs_flags = FS_RENAME_DOES_D_MOVE,
1388};
1389MODULE_ALIAS_FS("ceph");
1390
1391int ceph_force_reconnect(struct super_block *sb)
1392{
1393 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
1394 int err = 0;
1395
1396 fsc->mount_state = CEPH_MOUNT_RECOVER;
1397 __ceph_umount_begin(fsc);
1398
1399
1400
1401 flush_workqueue(fsc->inode_wq);
1402
1403
1404
1405 ceph_reset_client_addr(fsc->client);
1406
1407 ceph_osdc_clear_abort_err(&fsc->client->osdc);
1408
1409 fsc->blocklisted = false;
1410 fsc->mount_state = CEPH_MOUNT_MOUNTED;
1411
1412 if (sb->s_root) {
1413 err = __ceph_do_getattr(d_inode(sb->s_root), NULL,
1414 CEPH_STAT_CAP_INODE, true);
1415 }
1416 return err;
1417}
1418
1419static int __init init_ceph(void)
1420{
1421 int ret = init_caches();
1422 if (ret)
1423 goto out;
1424
1425 ceph_flock_init();
1426 ret = register_filesystem(&ceph_fs_type);
1427 if (ret)
1428 goto out_caches;
1429
1430 pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
1431
1432 return 0;
1433
1434out_caches:
1435 destroy_caches();
1436out:
1437 return ret;
1438}
1439
1440static void __exit exit_ceph(void)
1441{
1442 dout("exit_ceph\n");
1443 unregister_filesystem(&ceph_fs_type);
1444 destroy_caches();
1445}
1446
1447static int param_set_metrics(const char *val, const struct kernel_param *kp)
1448{
1449 struct ceph_fs_client *fsc;
1450 int ret;
1451
1452 ret = param_set_bool(val, kp);
1453 if (ret) {
1454 pr_err("Failed to parse sending metrics switch value '%s'\n",
1455 val);
1456 return ret;
1457 } else if (!disable_send_metrics) {
1458
1459 spin_lock(&ceph_fsc_lock);
1460 list_for_each_entry(fsc, &ceph_fsc_list, metric_wakeup) {
1461 metric_schedule_delayed(&fsc->mdsc->metric);
1462 }
1463 spin_unlock(&ceph_fsc_lock);
1464 }
1465
1466 return 0;
1467}
1468
1469static const struct kernel_param_ops param_ops_metrics = {
1470 .set = param_set_metrics,
1471 .get = param_get_bool,
1472};
1473
1474bool disable_send_metrics = false;
1475module_param_cb(disable_send_metrics, ¶m_ops_metrics, &disable_send_metrics, 0644);
1476MODULE_PARM_DESC(disable_send_metrics, "Enable sending perf metrics to ceph cluster (default: on)");
1477
1478
1479static bool mount_support = true;
1480static const struct kernel_param_ops param_ops_mount_syntax = {
1481 .get = param_get_bool,
1482};
1483module_param_cb(mount_syntax_v1, ¶m_ops_mount_syntax, &mount_support, 0444);
1484module_param_cb(mount_syntax_v2, ¶m_ops_mount_syntax, &mount_support, 0444);
1485
1486module_init(init_ceph);
1487module_exit(exit_ceph);
1488
1489MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
1490MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
1491MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
1492MODULE_DESCRIPTION("Ceph filesystem for Linux");
1493MODULE_LICENSE("GPL");
1494
