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Sage Weil16725b92009-10-06 11:31:07 -07001
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07002#include <linux/ceph/ceph_debug.h>
Sage Weil16725b92009-10-06 11:31:07 -07003
4#include <linux/backing-dev.h>
Sage Weilc309f0a2010-06-30 21:34:01 -07005#include <linux/ctype.h>
Sage Weil16725b92009-10-06 11:31:07 -07006#include <linux/fs.h>
7#include <linux/inet.h>
8#include <linux/in6.h>
9#include <linux/module.h>
10#include <linux/mount.h>
11#include <linux/parser.h>
Sage Weil16725b92009-10-06 11:31:07 -070012#include <linux/sched.h>
13#include <linux/seq_file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Sage Weil16725b92009-10-06 11:31:07 -070015#include <linux/statfs.h>
16#include <linux/string.h>
Sage Weil16725b92009-10-06 11:31:07 -070017
Sage Weil16725b92009-10-06 11:31:07 -070018#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070019#include "mds_client.h"
20
21#include <linux/ceph/decode.h>
22#include <linux/ceph/mon_client.h>
23#include <linux/ceph/auth.h>
24#include <linux/ceph/debugfs.h>
Sage Weil16725b92009-10-06 11:31:07 -070025
26/*
27 * Ceph superblock operations
28 *
29 * Handle the basics of mounting, unmounting.
30 */
31
Sage Weil16725b92009-10-06 11:31:07 -070032/*
33 * super ops
34 */
35static void ceph_put_super(struct super_block *s)
36{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070037 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -070038
39 dout("put_super\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070040 ceph_mdsc_close_sessions(fsc->mdsc);
Sage Weil5dfc5892010-05-04 16:14:46 -070041
42 /*
43 * ensure we release the bdi before put_anon_super releases
44 * the device name.
45 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070046 if (s->s_bdi == &fsc->backing_dev_info) {
47 bdi_unregister(&fsc->backing_dev_info);
Sage Weil5dfc5892010-05-04 16:14:46 -070048 s->s_bdi = NULL;
49 }
50
Sage Weil16725b92009-10-06 11:31:07 -070051 return;
52}
53
54static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
55{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070056 struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode);
57 struct ceph_monmap *monmap = fsc->client->monc.monmap;
Sage Weil16725b92009-10-06 11:31:07 -070058 struct ceph_statfs st;
59 u64 fsid;
60 int err;
61
62 dout("statfs\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070063 err = ceph_monc_do_statfs(&fsc->client->monc, &st);
Sage Weil16725b92009-10-06 11:31:07 -070064 if (err < 0)
65 return err;
66
67 /* fill in kstatfs */
68 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
69
70 /*
71 * express utilization in terms of large blocks to avoid
72 * overflow on 32-bit machines.
73 */
74 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
75 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
Greg Farnum8f04d422011-07-26 11:26:54 -070076 buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
Sage Weil16725b92009-10-06 11:31:07 -070077 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
78
79 buf->f_files = le64_to_cpu(st.num_objects);
80 buf->f_ffree = -1;
Sage Weil558d3492010-06-01 12:51:12 -070081 buf->f_namelen = NAME_MAX;
Sage Weil16725b92009-10-06 11:31:07 -070082 buf->f_frsize = PAGE_CACHE_SIZE;
83
84 /* leave fsid little-endian, regardless of host endianness */
85 fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
86 buf->f_fsid.val[0] = fsid & 0xffffffff;
87 buf->f_fsid.val[1] = fsid >> 32;
88
89 return 0;
90}
91
92
Sage Weil2d9c98a2010-07-30 09:38:13 -070093static int ceph_sync_fs(struct super_block *sb, int wait)
Sage Weil16725b92009-10-06 11:31:07 -070094{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070095 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil2d9c98a2010-07-30 09:38:13 -070096
97 if (!wait) {
98 dout("sync_fs (non-blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070099 ceph_flush_dirty_caps(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700100 dout("sync_fs (non-blocking) done\n");
101 return 0;
102 }
103
104 dout("sync_fs (blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700105 ceph_osdc_sync(&fsc->client->osdc);
106 ceph_mdsc_sync(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700107 dout("sync_fs (blocking) done\n");
Sage Weil16725b92009-10-06 11:31:07 -0700108 return 0;
109}
110
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700111/*
112 * mount options
113 */
114enum {
115 Opt_wsize,
116 Opt_rsize,
Sage Weil83817e32011-08-04 08:03:44 -0700117 Opt_rasize,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700118 Opt_caps_wanted_delay_min,
119 Opt_caps_wanted_delay_max,
120 Opt_cap_release_safety,
121 Opt_readdir_max_entries,
122 Opt_readdir_max_bytes,
123 Opt_congestion_kb,
124 Opt_last_int,
125 /* int args above */
126 Opt_snapdirname,
127 Opt_last_string,
128 /* string args above */
129 Opt_dirstat,
130 Opt_nodirstat,
131 Opt_rbytes,
132 Opt_norbytes,
133 Opt_noasyncreaddir,
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800134 Opt_ino32,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700135};
136
137static match_table_t fsopt_tokens = {
138 {Opt_wsize, "wsize=%d"},
139 {Opt_rsize, "rsize=%d"},
Sage Weil83817e32011-08-04 08:03:44 -0700140 {Opt_rasize, "rasize=%d"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700141 {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
142 {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
143 {Opt_cap_release_safety, "cap_release_safety=%d"},
144 {Opt_readdir_max_entries, "readdir_max_entries=%d"},
145 {Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
146 {Opt_congestion_kb, "write_congestion_kb=%d"},
147 /* int args above */
148 {Opt_snapdirname, "snapdirname=%s"},
149 /* string args above */
150 {Opt_dirstat, "dirstat"},
151 {Opt_nodirstat, "nodirstat"},
152 {Opt_rbytes, "rbytes"},
153 {Opt_norbytes, "norbytes"},
154 {Opt_noasyncreaddir, "noasyncreaddir"},
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800155 {Opt_ino32, "ino32"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700156 {-1, NULL}
157};
158
159static int parse_fsopt_token(char *c, void *private)
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800160{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700161 struct ceph_mount_options *fsopt = private;
162 substring_t argstr[MAX_OPT_ARGS];
163 int token, intval, ret;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800164
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700165 token = match_token((char *)c, fsopt_tokens, argstr);
166 if (token < 0)
167 return -EINVAL;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800168
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700169 if (token < Opt_last_int) {
170 ret = match_int(&argstr[0], &intval);
171 if (ret < 0) {
172 pr_err("bad mount option arg (not int) "
173 "at '%s'\n", c);
174 return ret;
175 }
176 dout("got int token %d val %d\n", token, intval);
177 } else if (token > Opt_last_int && token < Opt_last_string) {
178 dout("got string token %d val %s\n", token,
179 argstr[0].from);
180 } else {
181 dout("got token %d\n", token);
182 }
183
184 switch (token) {
185 case Opt_snapdirname:
186 kfree(fsopt->snapdir_name);
187 fsopt->snapdir_name = kstrndup(argstr[0].from,
188 argstr[0].to-argstr[0].from,
189 GFP_KERNEL);
190 if (!fsopt->snapdir_name)
191 return -ENOMEM;
192 break;
193
194 /* misc */
195 case Opt_wsize:
196 fsopt->wsize = intval;
197 break;
198 case Opt_rsize:
199 fsopt->rsize = intval;
200 break;
Sage Weil83817e32011-08-04 08:03:44 -0700201 case Opt_rasize:
202 fsopt->rasize = intval;
203 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700204 case Opt_caps_wanted_delay_min:
205 fsopt->caps_wanted_delay_min = intval;
206 break;
207 case Opt_caps_wanted_delay_max:
208 fsopt->caps_wanted_delay_max = intval;
209 break;
210 case Opt_readdir_max_entries:
211 fsopt->max_readdir = intval;
212 break;
213 case Opt_readdir_max_bytes:
214 fsopt->max_readdir_bytes = intval;
215 break;
216 case Opt_congestion_kb:
217 fsopt->congestion_kb = intval;
218 break;
219 case Opt_dirstat:
220 fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
221 break;
222 case Opt_nodirstat:
223 fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
224 break;
225 case Opt_rbytes:
226 fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
227 break;
228 case Opt_norbytes:
229 fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
230 break;
231 case Opt_noasyncreaddir:
232 fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
233 break;
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800234 case Opt_ino32:
235 fsopt->flags |= CEPH_MOUNT_OPT_INO32;
236 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700237 default:
238 BUG_ON(token);
239 }
240 return 0;
241}
242
243static void destroy_mount_options(struct ceph_mount_options *args)
244{
245 dout("destroy_mount_options %p\n", args);
246 kfree(args->snapdir_name);
247 kfree(args);
248}
249
250static int strcmp_null(const char *s1, const char *s2)
251{
252 if (!s1 && !s2)
253 return 0;
254 if (s1 && !s2)
255 return -1;
256 if (!s1 && s2)
257 return 1;
258 return strcmp(s1, s2);
259}
260
261static int compare_mount_options(struct ceph_mount_options *new_fsopt,
262 struct ceph_options *new_opt,
263 struct ceph_fs_client *fsc)
264{
265 struct ceph_mount_options *fsopt1 = new_fsopt;
266 struct ceph_mount_options *fsopt2 = fsc->mount_options;
267 int ofs = offsetof(struct ceph_mount_options, snapdir_name);
268 int ret;
269
270 ret = memcmp(fsopt1, fsopt2, ofs);
271 if (ret)
272 return ret;
273
274 ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
275 if (ret)
276 return ret;
277
278 return ceph_compare_options(new_opt, fsc->client);
279}
280
281static int parse_mount_options(struct ceph_mount_options **pfsopt,
282 struct ceph_options **popt,
283 int flags, char *options,
284 const char *dev_name,
285 const char **path)
286{
287 struct ceph_mount_options *fsopt;
288 const char *dev_name_end;
289 int err = -ENOMEM;
290
291 fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
292 if (!fsopt)
293 return -ENOMEM;
294
295 dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);
296
Noah Watkins80db8be2011-08-22 13:49:23 -0600297 fsopt->sb_flags = flags;
298 fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700299
Noah Watkins80db8be2011-08-22 13:49:23 -0600300 fsopt->rsize = CEPH_RSIZE_DEFAULT;
301 fsopt->rasize = CEPH_RASIZE_DEFAULT;
302 fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
Sage Weil50aac4f2011-01-18 07:59:40 -0800303 fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
304 fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
Noah Watkins80db8be2011-08-22 13:49:23 -0600305 fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT;
306 fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
307 fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
308 fsopt->congestion_kb = default_congestion_kb();
309
310 /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */
311 err = -EINVAL;
312 if (!dev_name)
313 goto out;
314 *path = strstr(dev_name, ":/");
315 if (*path == NULL) {
316 pr_err("device name is missing path (no :/ in %s)\n",
317 dev_name);
318 goto out;
319 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700320 dev_name_end = *path;
321 dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
322
323 /* path on server */
324 *path += 2;
325 dout("server path '%s'\n", *path);
326
327 err = ceph_parse_options(popt, options, dev_name, dev_name_end,
328 parse_fsopt_token, (void *)fsopt);
329 if (err)
330 goto out;
331
332 /* success */
333 *pfsopt = fsopt;
334 return 0;
335
336out:
337 destroy_mount_options(fsopt);
338 return err;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800339}
340
Sage Weil6e19a162010-04-29 16:38:32 -0700341/**
342 * ceph_show_options - Show mount options in /proc/mounts
343 * @m: seq_file to write to
344 * @mnt: mount descriptor
345 */
346static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
347{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700348 struct ceph_fs_client *fsc = ceph_sb_to_client(mnt->mnt_sb);
349 struct ceph_mount_options *fsopt = fsc->mount_options;
350 struct ceph_options *opt = fsc->client->options;
Sage Weil6e19a162010-04-29 16:38:32 -0700351
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700352 if (opt->flags & CEPH_OPT_FSID)
353 seq_printf(m, ",fsid=%pU", &opt->fsid);
354 if (opt->flags & CEPH_OPT_NOSHARE)
Sage Weil6e19a162010-04-29 16:38:32 -0700355 seq_puts(m, ",noshare");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700356 if (opt->flags & CEPH_OPT_NOCRC)
Sage Weil6e19a162010-04-29 16:38:32 -0700357 seq_puts(m, ",nocrc");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700358
359 if (opt->name)
360 seq_printf(m, ",name=%s", opt->name);
Tommi Virtanen8323c3a2011-03-25 16:32:57 -0700361 if (opt->key)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700362 seq_puts(m, ",secret=<hidden>");
363
364 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
365 seq_printf(m, ",mount_timeout=%d", opt->mount_timeout);
366 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
367 seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl);
368 if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT)
369 seq_printf(m, ",osdtimeout=%d", opt->osd_timeout);
370 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
371 seq_printf(m, ",osdkeepalivetimeout=%d",
372 opt->osd_keepalive_timeout);
373
374 if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
375 seq_puts(m, ",dirstat");
376 if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0)
377 seq_puts(m, ",norbytes");
378 if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
Sage Weil6e19a162010-04-29 16:38:32 -0700379 seq_puts(m, ",noasyncreaddir");
380
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700381 if (fsopt->wsize)
382 seq_printf(m, ",wsize=%d", fsopt->wsize);
Sage Weil80456f82011-03-10 13:33:26 -0800383 if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700384 seq_printf(m, ",rsize=%d", fsopt->rsize);
Sage Weil83817e32011-08-04 08:03:44 -0700385 if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
Sage Weil21519372011-12-01 08:06:52 -0800386 seq_printf(m, ",rasize=%d", fsopt->rasize);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700387 if (fsopt->congestion_kb != default_congestion_kb())
388 seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
389 if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700390 seq_printf(m, ",caps_wanted_delay_min=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700391 fsopt->caps_wanted_delay_min);
392 if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700393 seq_printf(m, ",caps_wanted_delay_max=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700394 fsopt->caps_wanted_delay_max);
395 if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700396 seq_printf(m, ",cap_release_safety=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700397 fsopt->cap_release_safety);
398 if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
399 seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
400 if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
401 seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
402 if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
403 seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name);
Sage Weil6e19a162010-04-29 16:38:32 -0700404 return 0;
405}
406
407/*
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700408 * handle any mon messages the standard library doesn't understand.
409 * return error if we don't either.
410 */
411static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
412{
413 struct ceph_fs_client *fsc = client->private;
414 int type = le16_to_cpu(msg->hdr.type);
415
416 switch (type) {
417 case CEPH_MSG_MDS_MAP:
418 ceph_mdsc_handle_map(fsc->mdsc, msg);
419 return 0;
420
421 default:
422 return -1;
423 }
424}
425
426/*
427 * create a new fs client
428 */
H Hartley Sweeten0c6d4b4e22011-09-23 11:53:30 -0700429static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700430 struct ceph_options *opt)
431{
432 struct ceph_fs_client *fsc;
Sage Weil6ab00d42011-08-09 09:41:59 -0700433 const unsigned supported_features =
434 CEPH_FEATURE_FLOCK |
435 CEPH_FEATURE_DIRLAYOUTHASH;
436 const unsigned required_features = 0;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700437 int err = -ENOMEM;
438
439 fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
440 if (!fsc)
441 return ERR_PTR(-ENOMEM);
442
Sage Weil6ab00d42011-08-09 09:41:59 -0700443 fsc->client = ceph_create_client(opt, fsc, supported_features,
444 required_features);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700445 if (IS_ERR(fsc->client)) {
446 err = PTR_ERR(fsc->client);
447 goto fail;
448 }
449 fsc->client->extra_mon_dispatch = extra_mon_dispatch;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700450 fsc->client->monc.want_mdsmap = 1;
451
452 fsc->mount_options = fsopt;
453
454 fsc->sb = NULL;
455 fsc->mount_state = CEPH_MOUNT_MOUNTING;
456
457 atomic_long_set(&fsc->writeback_count, 0);
458
459 err = bdi_init(&fsc->backing_dev_info);
460 if (err < 0)
461 goto fail_client;
462
463 err = -ENOMEM;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100464 /*
465 * The number of concurrent works can be high but they don't need
466 * to be processed in parallel, limit concurrency.
467 */
468 fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700469 if (fsc->wb_wq == NULL)
470 goto fail_bdi;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100471 fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700472 if (fsc->pg_inv_wq == NULL)
473 goto fail_wb_wq;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100474 fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700475 if (fsc->trunc_wq == NULL)
476 goto fail_pg_inv_wq;
477
478 /* set up mempools */
479 err = -ENOMEM;
480 fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
481 fsc->mount_options->wsize >> PAGE_CACHE_SHIFT);
482 if (!fsc->wb_pagevec_pool)
483 goto fail_trunc_wq;
484
485 /* caps */
486 fsc->min_caps = fsopt->max_readdir;
487
488 return fsc;
489
490fail_trunc_wq:
491 destroy_workqueue(fsc->trunc_wq);
492fail_pg_inv_wq:
493 destroy_workqueue(fsc->pg_inv_wq);
494fail_wb_wq:
495 destroy_workqueue(fsc->wb_wq);
496fail_bdi:
497 bdi_destroy(&fsc->backing_dev_info);
498fail_client:
499 ceph_destroy_client(fsc->client);
500fail:
501 kfree(fsc);
502 return ERR_PTR(err);
503}
504
H Hartley Sweeten0c6d4b4e22011-09-23 11:53:30 -0700505static void destroy_fs_client(struct ceph_fs_client *fsc)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700506{
507 dout("destroy_fs_client %p\n", fsc);
508
509 destroy_workqueue(fsc->wb_wq);
510 destroy_workqueue(fsc->pg_inv_wq);
511 destroy_workqueue(fsc->trunc_wq);
512
513 bdi_destroy(&fsc->backing_dev_info);
514
515 mempool_destroy(fsc->wb_pagevec_pool);
516
517 destroy_mount_options(fsc->mount_options);
518
519 ceph_fs_debugfs_cleanup(fsc);
520
521 ceph_destroy_client(fsc->client);
522
523 kfree(fsc);
524 dout("destroy_fs_client %p done\n", fsc);
525}
526
527/*
Sage Weil6e19a162010-04-29 16:38:32 -0700528 * caches
529 */
530struct kmem_cache *ceph_inode_cachep;
531struct kmem_cache *ceph_cap_cachep;
532struct kmem_cache *ceph_dentry_cachep;
533struct kmem_cache *ceph_file_cachep;
534
535static void ceph_inode_init_once(void *foo)
536{
537 struct ceph_inode_info *ci = foo;
538 inode_init_once(&ci->vfs_inode);
539}
540
Sage Weil16725b92009-10-06 11:31:07 -0700541static int __init init_caches(void)
542{
543 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
544 sizeof(struct ceph_inode_info),
545 __alignof__(struct ceph_inode_info),
546 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
547 ceph_inode_init_once);
548 if (ceph_inode_cachep == NULL)
549 return -ENOMEM;
550
551 ceph_cap_cachep = KMEM_CACHE(ceph_cap,
552 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
553 if (ceph_cap_cachep == NULL)
554 goto bad_cap;
555
556 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
557 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
558 if (ceph_dentry_cachep == NULL)
559 goto bad_dentry;
560
561 ceph_file_cachep = KMEM_CACHE(ceph_file_info,
562 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
563 if (ceph_file_cachep == NULL)
564 goto bad_file;
565
566 return 0;
567
568bad_file:
569 kmem_cache_destroy(ceph_dentry_cachep);
570bad_dentry:
571 kmem_cache_destroy(ceph_cap_cachep);
572bad_cap:
573 kmem_cache_destroy(ceph_inode_cachep);
574 return -ENOMEM;
575}
576
577static void destroy_caches(void)
578{
579 kmem_cache_destroy(ceph_inode_cachep);
580 kmem_cache_destroy(ceph_cap_cachep);
581 kmem_cache_destroy(ceph_dentry_cachep);
582 kmem_cache_destroy(ceph_file_cachep);
583}
584
585
586/*
587 * ceph_umount_begin - initiate forced umount. Tear down down the
588 * mount, skipping steps that may hang while waiting for server(s).
589 */
590static void ceph_umount_begin(struct super_block *sb)
591{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700592 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700593
594 dout("ceph_umount_begin - starting forced umount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700595 if (!fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700596 return;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700597 fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
Sage Weil16725b92009-10-06 11:31:07 -0700598 return;
599}
600
601static const struct super_operations ceph_super_ops = {
602 .alloc_inode = ceph_alloc_inode,
603 .destroy_inode = ceph_destroy_inode,
604 .write_inode = ceph_write_inode,
Sage Weil2d9c98a2010-07-30 09:38:13 -0700605 .sync_fs = ceph_sync_fs,
Sage Weil16725b92009-10-06 11:31:07 -0700606 .put_super = ceph_put_super,
607 .show_options = ceph_show_options,
608 .statfs = ceph_statfs,
609 .umount_begin = ceph_umount_begin,
610};
611
Sage Weil16725b92009-10-06 11:31:07 -0700612/*
613 * Bootstrap mount by opening the root directory. Note the mount
614 * @started time from caller, and time out if this takes too long.
615 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700616static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700617 const char *path,
618 unsigned long started)
619{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700620 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil16725b92009-10-06 11:31:07 -0700621 struct ceph_mds_request *req = NULL;
622 int err;
623 struct dentry *root;
624
625 /* open dir */
626 dout("open_root_inode opening '%s'\n", path);
627 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
628 if (IS_ERR(req))
Julia Lawall7e34bc52010-05-22 12:01:14 +0200629 return ERR_CAST(req);
Sage Weil16725b92009-10-06 11:31:07 -0700630 req->r_path1 = kstrdup(path, GFP_NOFS);
631 req->r_ino1.ino = CEPH_INO_ROOT;
632 req->r_ino1.snap = CEPH_NOSNAP;
633 req->r_started = started;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700634 req->r_timeout = fsc->client->options->mount_timeout * HZ;
Sage Weil16725b92009-10-06 11:31:07 -0700635 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
636 req->r_num_caps = 2;
637 err = ceph_mdsc_do_request(mdsc, NULL, req);
638 if (err == 0) {
639 dout("open_root_inode success\n");
640 if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT &&
Sage Weil774ac212011-11-11 09:48:08 -0800641 fsc->sb->s_root == NULL) {
Sage Weil16725b92009-10-06 11:31:07 -0700642 root = d_alloc_root(req->r_target_inode);
Sage Weil774ac212011-11-11 09:48:08 -0800643 ceph_init_dentry(root);
644 } else {
Sage Weil16725b92009-10-06 11:31:07 -0700645 root = d_obtain_alias(req->r_target_inode);
Sage Weil774ac212011-11-11 09:48:08 -0800646 }
Sage Weil16725b92009-10-06 11:31:07 -0700647 req->r_target_inode = NULL;
648 dout("open_root_inode success, root dentry is %p\n", root);
649 } else {
650 root = ERR_PTR(err);
651 }
652 ceph_mdsc_put_request(req);
653 return root;
654}
655
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700656
657
658
Sage Weil16725b92009-10-06 11:31:07 -0700659/*
660 * mount: join the ceph cluster, and open root directory.
661 */
Al Viroa7f9fb22010-07-26 16:17:55 +0400662static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700663 const char *path)
664{
Sage Weil16725b92009-10-06 11:31:07 -0700665 int err;
Sage Weil16725b92009-10-06 11:31:07 -0700666 unsigned long started = jiffies; /* note the start time */
667 struct dentry *root;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700668 int first = 0; /* first vfsmount for this super_block */
Sage Weil16725b92009-10-06 11:31:07 -0700669
670 dout("mount start\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700671 mutex_lock(&fsc->client->mount_mutex);
Sage Weil16725b92009-10-06 11:31:07 -0700672
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700673 err = __ceph_open_session(fsc->client, started);
Sage Weil16725b92009-10-06 11:31:07 -0700674 if (err < 0)
675 goto out;
676
Sage Weil16725b92009-10-06 11:31:07 -0700677 dout("mount opening root\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700678 root = open_root_dentry(fsc, "", started);
Sage Weil16725b92009-10-06 11:31:07 -0700679 if (IS_ERR(root)) {
680 err = PTR_ERR(root);
681 goto out;
682 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700683 if (fsc->sb->s_root) {
Sage Weil16725b92009-10-06 11:31:07 -0700684 dput(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700685 } else {
686 fsc->sb->s_root = root;
687 first = 1;
688
689 err = ceph_fs_debugfs_init(fsc);
690 if (err < 0)
691 goto fail;
692 }
Sage Weil16725b92009-10-06 11:31:07 -0700693
694 if (path[0] == 0) {
695 dget(root);
696 } else {
697 dout("mount opening base mountpoint\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700698 root = open_root_dentry(fsc, path, started);
Sage Weil16725b92009-10-06 11:31:07 -0700699 if (IS_ERR(root)) {
700 err = PTR_ERR(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700701 goto fail;
Sage Weil16725b92009-10-06 11:31:07 -0700702 }
703 }
704
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700705 fsc->mount_state = CEPH_MOUNT_MOUNTED;
Sage Weil16725b92009-10-06 11:31:07 -0700706 dout("mount success\n");
Al Viroa7f9fb22010-07-26 16:17:55 +0400707 mutex_unlock(&fsc->client->mount_mutex);
708 return root;
Sage Weil16725b92009-10-06 11:31:07 -0700709
710out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700711 mutex_unlock(&fsc->client->mount_mutex);
Al Viroa7f9fb22010-07-26 16:17:55 +0400712 return ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700713
714fail:
715 if (first) {
716 dput(fsc->sb->s_root);
717 fsc->sb->s_root = NULL;
718 }
719 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700720}
721
722static int ceph_set_super(struct super_block *s, void *data)
723{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700724 struct ceph_fs_client *fsc = data;
Sage Weil16725b92009-10-06 11:31:07 -0700725 int ret;
726
727 dout("set_super %p data %p\n", s, data);
728
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700729 s->s_flags = fsc->mount_options->sb_flags;
Sage Weil16725b92009-10-06 11:31:07 -0700730 s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
731
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700732 s->s_fs_info = fsc;
733 fsc->sb = s;
Sage Weil16725b92009-10-06 11:31:07 -0700734
735 s->s_op = &ceph_super_ops;
736 s->s_export_op = &ceph_export_ops;
737
738 s->s_time_gran = 1000; /* 1000 ns == 1 us */
739
740 ret = set_anon_super(s, NULL); /* what is that second arg for? */
741 if (ret != 0)
742 goto fail;
743
744 return ret;
745
746fail:
747 s->s_fs_info = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700748 fsc->sb = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700749 return ret;
750}
751
752/*
753 * share superblock if same fs AND options
754 */
755static int ceph_compare_super(struct super_block *sb, void *data)
756{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700757 struct ceph_fs_client *new = data;
758 struct ceph_mount_options *fsopt = new->mount_options;
759 struct ceph_options *opt = new->client->options;
760 struct ceph_fs_client *other = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700761
762 dout("ceph_compare_super %p\n", sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700763
764 if (compare_mount_options(fsopt, opt, other)) {
765 dout("monitor(s)/mount options don't match\n");
766 return 0;
Sage Weil16725b92009-10-06 11:31:07 -0700767 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700768 if ((opt->flags & CEPH_OPT_FSID) &&
769 ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
770 dout("fsid doesn't match\n");
771 return 0;
772 }
773 if (fsopt->sb_flags != other->mount_options->sb_flags) {
Sage Weil16725b92009-10-06 11:31:07 -0700774 dout("flags differ\n");
775 return 0;
776 }
777 return 1;
778}
779
780/*
781 * construct our own bdi so we can control readahead, etc.
782 */
Jeff Mahoney00d56432010-06-10 11:13:58 -0400783static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
Sage Weil31e0cf82010-05-04 16:39:35 -0700784
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700785static int ceph_register_bdi(struct super_block *sb,
786 struct ceph_fs_client *fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700787{
788 int err;
789
Sage Weil83817e32011-08-04 08:03:44 -0700790 /* set ra_pages based on rasize mount option? */
791 if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700792 fsc->backing_dev_info.ra_pages =
Sage Weil83817e32011-08-04 08:03:44 -0700793 (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1)
Sage Weil16725b92009-10-06 11:31:07 -0700794 >> PAGE_SHIFT;
Yehuda Sadehe9852222011-07-22 11:12:28 -0700795 else
796 fsc->backing_dev_info.ra_pages =
797 default_backing_dev_info.ra_pages;
798
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700799 err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
Sage Weil31e0cf82010-05-04 16:39:35 -0700800 atomic_long_inc_return(&bdi_seq));
Sage Weil5dfc5892010-05-04 16:14:46 -0700801 if (!err)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700802 sb->s_bdi = &fsc->backing_dev_info;
Sage Weil16725b92009-10-06 11:31:07 -0700803 return err;
804}
805
Al Viroa7f9fb22010-07-26 16:17:55 +0400806static struct dentry *ceph_mount(struct file_system_type *fs_type,
807 int flags, const char *dev_name, void *data)
Sage Weil16725b92009-10-06 11:31:07 -0700808{
809 struct super_block *sb;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700810 struct ceph_fs_client *fsc;
Al Viroa7f9fb22010-07-26 16:17:55 +0400811 struct dentry *res;
Sage Weil16725b92009-10-06 11:31:07 -0700812 int err;
813 int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
Sage Weil6a18be12009-11-04 11:40:05 -0800814 const char *path = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700815 struct ceph_mount_options *fsopt = NULL;
816 struct ceph_options *opt = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700817
Al Viroa7f9fb22010-07-26 16:17:55 +0400818 dout("ceph_mount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700819 err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path);
Al Viroa7f9fb22010-07-26 16:17:55 +0400820 if (err < 0) {
821 res = ERR_PTR(err);
Sage Weil6b805182009-10-27 11:50:50 -0700822 goto out_final;
Al Viroa7f9fb22010-07-26 16:17:55 +0400823 }
Sage Weil16725b92009-10-06 11:31:07 -0700824
825 /* create client (which we may/may not use) */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700826 fsc = create_fs_client(fsopt, opt);
827 if (IS_ERR(fsc)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400828 res = ERR_CAST(fsc);
Noah Watkins259a1872011-08-22 13:49:41 -0600829 destroy_mount_options(fsopt);
830 ceph_destroy_options(opt);
Sage Weil6b805182009-10-27 11:50:50 -0700831 goto out_final;
832 }
Sage Weil16725b92009-10-06 11:31:07 -0700833
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700834 err = ceph_mdsc_init(fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400835 if (err < 0) {
836 res = ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700837 goto out;
Al Viroa7f9fb22010-07-26 16:17:55 +0400838 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700839
840 if (ceph_test_opt(fsc->client, NOSHARE))
Sage Weil16725b92009-10-06 11:31:07 -0700841 compare_super = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700842 sb = sget(fs_type, compare_super, ceph_set_super, fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700843 if (IS_ERR(sb)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400844 res = ERR_CAST(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700845 goto out;
846 }
847
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700848 if (ceph_sb_to_client(sb) != fsc) {
849 ceph_mdsc_destroy(fsc);
850 destroy_fs_client(fsc);
851 fsc = ceph_sb_to_client(sb);
852 dout("get_sb got existing client %p\n", fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700853 } else {
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700854 dout("get_sb using new client %p\n", fsc);
855 err = ceph_register_bdi(sb, fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400856 if (err < 0) {
857 res = ERR_PTR(err);
Sage Weil16725b92009-10-06 11:31:07 -0700858 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400859 }
Sage Weil16725b92009-10-06 11:31:07 -0700860 }
861
Al Viroa7f9fb22010-07-26 16:17:55 +0400862 res = ceph_real_mount(fsc, path);
863 if (IS_ERR(res))
Sage Weil16725b92009-10-06 11:31:07 -0700864 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400865 dout("root %p inode %p ino %llx.%llx\n", res,
866 res->d_inode, ceph_vinop(res->d_inode));
867 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700868
869out_splat:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700870 ceph_mdsc_close_sessions(fsc->mdsc);
Al Viro3981f2e2010-03-21 19:22:29 -0400871 deactivate_locked_super(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700872 goto out_final;
873
874out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700875 ceph_mdsc_destroy(fsc);
876 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700877out_final:
Al Viroa7f9fb22010-07-26 16:17:55 +0400878 dout("ceph_mount fail %ld\n", PTR_ERR(res));
879 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700880}
881
882static void ceph_kill_sb(struct super_block *s)
883{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700884 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -0700885 dout("kill_sb %p\n", s);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700886 ceph_mdsc_pre_umount(fsc->mdsc);
Sage Weil16725b92009-10-06 11:31:07 -0700887 kill_anon_super(s); /* will call put_super after sb is r/o */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700888 ceph_mdsc_destroy(fsc);
889 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700890}
891
892static struct file_system_type ceph_fs_type = {
893 .owner = THIS_MODULE,
894 .name = "ceph",
Al Viroa7f9fb22010-07-26 16:17:55 +0400895 .mount = ceph_mount,
Sage Weil16725b92009-10-06 11:31:07 -0700896 .kill_sb = ceph_kill_sb,
897 .fs_flags = FS_RENAME_DOES_D_MOVE,
898};
899
900#define _STRINGIFY(x) #x
901#define STRINGIFY(x) _STRINGIFY(x)
902
903static int __init init_ceph(void)
904{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700905 int ret = init_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700906 if (ret)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700907 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700908
Sage Weil16725b92009-10-06 11:31:07 -0700909 ret = register_filesystem(&ceph_fs_type);
910 if (ret)
911 goto out_icache;
912
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700913 pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
914
Sage Weil16725b92009-10-06 11:31:07 -0700915 return 0;
916
917out_icache:
918 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700919out:
920 return ret;
921}
922
923static void __exit exit_ceph(void)
924{
925 dout("exit_ceph\n");
926 unregister_filesystem(&ceph_fs_type);
Sage Weil16725b92009-10-06 11:31:07 -0700927 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700928}
929
930module_init(init_ceph);
931module_exit(exit_ceph);
932
933MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
934MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
935MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
936MODULE_DESCRIPTION("Ceph filesystem for Linux");
937MODULE_LICENSE("GPL");