Commit | Line | Data |
---|---|---|
16725b9d | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
16725b9d SW |
3 | |
4 | #include <linux/backing-dev.h> | |
c309f0ab | 5 | #include <linux/ctype.h> |
16725b9d SW |
6 | #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> | |
16725b9d SW |
12 | #include <linux/sched.h> |
13 | #include <linux/seq_file.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
16725b9d SW |
15 | #include <linux/statfs.h> |
16 | #include <linux/string.h> | |
16725b9d | 17 | |
16725b9d | 18 | #include "super.h" |
3d14c5d2 YS |
19 | #include "mds_client.h" |
20 | ||
1fe60e51 | 21 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
22 | #include <linux/ceph/decode.h> |
23 | #include <linux/ceph/mon_client.h> | |
24 | #include <linux/ceph/auth.h> | |
25 | #include <linux/ceph/debugfs.h> | |
16725b9d SW |
26 | |
27 | /* | |
28 | * Ceph superblock operations | |
29 | * | |
30 | * Handle the basics of mounting, unmounting. | |
31 | */ | |
32 | ||
16725b9d SW |
33 | /* |
34 | * super ops | |
35 | */ | |
36 | static void ceph_put_super(struct super_block *s) | |
37 | { | |
3d14c5d2 | 38 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d SW |
39 | |
40 | dout("put_super\n"); | |
3d14c5d2 | 41 | ceph_mdsc_close_sessions(fsc->mdsc); |
5dfc589a SW |
42 | |
43 | /* | |
44 | * ensure we release the bdi before put_anon_super releases | |
45 | * the device name. | |
46 | */ | |
3d14c5d2 YS |
47 | if (s->s_bdi == &fsc->backing_dev_info) { |
48 | bdi_unregister(&fsc->backing_dev_info); | |
5dfc589a SW |
49 | s->s_bdi = NULL; |
50 | } | |
51 | ||
16725b9d SW |
52 | return; |
53 | } | |
54 | ||
55 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
56 | { | |
3d14c5d2 YS |
57 | struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode); |
58 | struct ceph_monmap *monmap = fsc->client->monc.monmap; | |
16725b9d SW |
59 | struct ceph_statfs st; |
60 | u64 fsid; | |
61 | int err; | |
62 | ||
63 | dout("statfs\n"); | |
3d14c5d2 | 64 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
16725b9d SW |
65 | if (err < 0) |
66 | return err; | |
67 | ||
68 | /* fill in kstatfs */ | |
69 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
70 | ||
71 | /* | |
72 | * express utilization in terms of large blocks to avoid | |
73 | * overflow on 32-bit machines. | |
74 | */ | |
75 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
76 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
8f04d422 | 77 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
16725b9d SW |
78 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
79 | ||
80 | buf->f_files = le64_to_cpu(st.num_objects); | |
81 | buf->f_ffree = -1; | |
558d3499 | 82 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
83 | buf->f_frsize = PAGE_CACHE_SIZE; |
84 | ||
85 | /* leave fsid little-endian, regardless of host endianness */ | |
86 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
87 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
88 | buf->f_fsid.val[1] = fsid >> 32; | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | ||
2d9c98ae | 94 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 95 | { |
3d14c5d2 | 96 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
97 | |
98 | if (!wait) { | |
99 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 100 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
101 | dout("sync_fs (non-blocking) done\n"); |
102 | return 0; | |
103 | } | |
104 | ||
105 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
106 | ceph_osdc_sync(&fsc->client->osdc); |
107 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 108 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
109 | return 0; |
110 | } | |
111 | ||
16725b9d SW |
112 | /* |
113 | * mount options | |
114 | */ | |
115 | enum { | |
16725b9d SW |
116 | Opt_wsize, |
117 | Opt_rsize, | |
83817e35 | 118 | Opt_rasize, |
16725b9d SW |
119 | Opt_caps_wanted_delay_min, |
120 | Opt_caps_wanted_delay_max, | |
6e19a16e | 121 | Opt_cap_release_safety, |
16725b9d | 122 | Opt_readdir_max_entries, |
23804d91 | 123 | Opt_readdir_max_bytes, |
2baba250 | 124 | Opt_congestion_kb, |
e53c2fe0 | 125 | Opt_last_int, |
16725b9d SW |
126 | /* int args above */ |
127 | Opt_snapdirname, | |
e53c2fe0 | 128 | Opt_last_string, |
16725b9d | 129 | /* string args above */ |
16725b9d SW |
130 | Opt_dirstat, |
131 | Opt_nodirstat, | |
132 | Opt_rbytes, | |
133 | Opt_norbytes, | |
cffaba15 | 134 | Opt_asyncreaddir, |
16725b9d | 135 | Opt_noasyncreaddir, |
a40dc6cc SW |
136 | Opt_dcache, |
137 | Opt_nodcache, | |
ad1fee96 | 138 | Opt_ino32, |
cffaba15 | 139 | Opt_noino32, |
16725b9d SW |
140 | }; |
141 | ||
3d14c5d2 | 142 | static match_table_t fsopt_tokens = { |
16725b9d SW |
143 | {Opt_wsize, "wsize=%d"}, |
144 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 145 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
146 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
147 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 148 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 149 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 150 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 151 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
152 | /* int args above */ |
153 | {Opt_snapdirname, "snapdirname=%s"}, | |
16725b9d | 154 | /* string args above */ |
16725b9d SW |
155 | {Opt_dirstat, "dirstat"}, |
156 | {Opt_nodirstat, "nodirstat"}, | |
157 | {Opt_rbytes, "rbytes"}, | |
158 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 159 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 160 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
161 | {Opt_dcache, "dcache"}, |
162 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 163 | {Opt_ino32, "ino32"}, |
cffaba15 | 164 | {Opt_noino32, "noino32"}, |
16725b9d SW |
165 | {-1, NULL} |
166 | }; | |
167 | ||
3d14c5d2 | 168 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 169 | { |
3d14c5d2 YS |
170 | struct ceph_mount_options *fsopt = private; |
171 | substring_t argstr[MAX_OPT_ARGS]; | |
172 | int token, intval, ret; | |
173 | ||
174 | token = match_token((char *)c, fsopt_tokens, argstr); | |
175 | if (token < 0) | |
176 | return -EINVAL; | |
177 | ||
178 | if (token < Opt_last_int) { | |
179 | ret = match_int(&argstr[0], &intval); | |
180 | if (ret < 0) { | |
181 | pr_err("bad mount option arg (not int) " | |
182 | "at '%s'\n", c); | |
183 | return ret; | |
c309f0ab | 184 | } |
3d14c5d2 YS |
185 | dout("got int token %d val %d\n", token, intval); |
186 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
187 | dout("got string token %d val %s\n", token, | |
188 | argstr[0].from); | |
189 | } else { | |
190 | dout("got token %d\n", token); | |
c309f0ab SW |
191 | } |
192 | ||
3d14c5d2 YS |
193 | switch (token) { |
194 | case Opt_snapdirname: | |
195 | kfree(fsopt->snapdir_name); | |
196 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
197 | argstr[0].to-argstr[0].from, | |
198 | GFP_KERNEL); | |
199 | if (!fsopt->snapdir_name) | |
200 | return -ENOMEM; | |
201 | break; | |
202 | ||
203 | /* misc */ | |
204 | case Opt_wsize: | |
205 | fsopt->wsize = intval; | |
206 | break; | |
207 | case Opt_rsize: | |
208 | fsopt->rsize = intval; | |
209 | break; | |
83817e35 SW |
210 | case Opt_rasize: |
211 | fsopt->rasize = intval; | |
212 | break; | |
3d14c5d2 YS |
213 | case Opt_caps_wanted_delay_min: |
214 | fsopt->caps_wanted_delay_min = intval; | |
215 | break; | |
216 | case Opt_caps_wanted_delay_max: | |
217 | fsopt->caps_wanted_delay_max = intval; | |
218 | break; | |
219 | case Opt_readdir_max_entries: | |
220 | fsopt->max_readdir = intval; | |
221 | break; | |
222 | case Opt_readdir_max_bytes: | |
223 | fsopt->max_readdir_bytes = intval; | |
224 | break; | |
225 | case Opt_congestion_kb: | |
226 | fsopt->congestion_kb = intval; | |
227 | break; | |
228 | case Opt_dirstat: | |
229 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
230 | break; | |
231 | case Opt_nodirstat: | |
232 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
233 | break; | |
234 | case Opt_rbytes: | |
235 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
236 | break; | |
237 | case Opt_norbytes: | |
238 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
239 | break; | |
cffaba15 AE |
240 | case Opt_asyncreaddir: |
241 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
242 | break; | |
3d14c5d2 YS |
243 | case Opt_noasyncreaddir: |
244 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
245 | break; | |
a40dc6cc SW |
246 | case Opt_dcache: |
247 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
248 | break; | |
249 | case Opt_nodcache: | |
250 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
251 | break; | |
ad1fee96 YS |
252 | case Opt_ino32: |
253 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
254 | break; | |
cffaba15 AE |
255 | case Opt_noino32: |
256 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
257 | break; | |
3d14c5d2 YS |
258 | default: |
259 | BUG_ON(token); | |
260 | } | |
261 | return 0; | |
c309f0ab | 262 | } |
16725b9d | 263 | |
3d14c5d2 | 264 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 265 | { |
3d14c5d2 YS |
266 | dout("destroy_mount_options %p\n", args); |
267 | kfree(args->snapdir_name); | |
268 | kfree(args); | |
269 | } | |
16725b9d | 270 | |
3d14c5d2 YS |
271 | static int strcmp_null(const char *s1, const char *s2) |
272 | { | |
273 | if (!s1 && !s2) | |
274 | return 0; | |
275 | if (s1 && !s2) | |
276 | return -1; | |
277 | if (!s1 && s2) | |
278 | return 1; | |
279 | return strcmp(s1, s2); | |
280 | } | |
16725b9d | 281 | |
3d14c5d2 YS |
282 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
283 | struct ceph_options *new_opt, | |
284 | struct ceph_fs_client *fsc) | |
285 | { | |
286 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
287 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
288 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
289 | int ret; | |
16725b9d | 290 | |
3d14c5d2 YS |
291 | ret = memcmp(fsopt1, fsopt2, ofs); |
292 | if (ret) | |
293 | return ret; | |
294 | ||
295 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
296 | if (ret) | |
297 | return ret; | |
298 | ||
299 | return ceph_compare_options(new_opt, fsc->client); | |
300 | } | |
301 | ||
302 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
303 | struct ceph_options **popt, | |
304 | int flags, char *options, | |
305 | const char *dev_name, | |
306 | const char **path) | |
307 | { | |
308 | struct ceph_mount_options *fsopt; | |
309 | const char *dev_name_end; | |
310 | int err = -ENOMEM; | |
311 | ||
312 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
313 | if (!fsopt) | |
314 | return -ENOMEM; | |
315 | ||
316 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
317 | ||
80db8bea NW |
318 | fsopt->sb_flags = flags; |
319 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 320 | |
80db8bea NW |
321 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
322 | fsopt->rasize = CEPH_RASIZE_DEFAULT; | |
323 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
50aac4fe SW |
324 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
325 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
326 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
327 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
328 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
329 | fsopt->congestion_kb = default_congestion_kb(); | |
330 | ||
331 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ | |
332 | err = -EINVAL; | |
333 | if (!dev_name) | |
334 | goto out; | |
335 | *path = strstr(dev_name, ":/"); | |
336 | if (*path == NULL) { | |
337 | pr_err("device name is missing path (no :/ in %s)\n", | |
338 | dev_name); | |
339 | goto out; | |
340 | } | |
3d14c5d2 YS |
341 | dev_name_end = *path; |
342 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); | |
16725b9d | 343 | |
16725b9d SW |
344 | /* path on server */ |
345 | *path += 2; | |
346 | dout("server path '%s'\n", *path); | |
347 | ||
ee57741c | 348 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 349 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
350 | if (IS_ERR(*popt)) { |
351 | err = PTR_ERR(*popt); | |
3d14c5d2 | 352 | goto out; |
ee57741c | 353 | } |
3d14c5d2 YS |
354 | |
355 | /* success */ | |
356 | *pfsopt = fsopt; | |
357 | return 0; | |
16725b9d | 358 | |
7b813c46 | 359 | out: |
3d14c5d2 YS |
360 | destroy_mount_options(fsopt); |
361 | return err; | |
16725b9d SW |
362 | } |
363 | ||
3d14c5d2 YS |
364 | /** |
365 | * ceph_show_options - Show mount options in /proc/mounts | |
366 | * @m: seq_file to write to | |
34c80b1d | 367 | * @root: root of that (sub)tree |
3d14c5d2 | 368 | */ |
34c80b1d | 369 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 370 | { |
34c80b1d | 371 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 YS |
372 | struct ceph_mount_options *fsopt = fsc->mount_options; |
373 | struct ceph_options *opt = fsc->client->options; | |
374 | ||
375 | if (opt->flags & CEPH_OPT_FSID) | |
376 | seq_printf(m, ",fsid=%pU", &opt->fsid); | |
377 | if (opt->flags & CEPH_OPT_NOSHARE) | |
378 | seq_puts(m, ",noshare"); | |
379 | if (opt->flags & CEPH_OPT_NOCRC) | |
380 | seq_puts(m, ",nocrc"); | |
381 | ||
382 | if (opt->name) | |
383 | seq_printf(m, ",name=%s", opt->name); | |
8323c3aa | 384 | if (opt->key) |
3d14c5d2 YS |
385 | seq_puts(m, ",secret=<hidden>"); |
386 | ||
387 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
388 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); | |
389 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
390 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); | |
391 | if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT) | |
392 | seq_printf(m, ",osdtimeout=%d", opt->osd_timeout); | |
393 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) | |
394 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
395 | opt->osd_keepalive_timeout); | |
396 | ||
397 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
398 | seq_puts(m, ",dirstat"); | |
399 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) | |
400 | seq_puts(m, ",norbytes"); | |
401 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) | |
402 | seq_puts(m, ",noasyncreaddir"); | |
a40dc6cc SW |
403 | if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE) |
404 | seq_puts(m, ",dcache"); | |
405 | else | |
406 | seq_puts(m, ",nodcache"); | |
3d14c5d2 YS |
407 | |
408 | if (fsopt->wsize) | |
409 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 410 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 | 411 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 412 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 413 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
414 | if (fsopt->congestion_kb != default_congestion_kb()) |
415 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
416 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
417 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
418 | fsopt->caps_wanted_delay_min); | |
419 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
420 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
421 | fsopt->caps_wanted_delay_max); | |
422 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
423 | seq_printf(m, ",cap_release_safety=%d", | |
424 | fsopt->cap_release_safety); | |
425 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
426 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
427 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
428 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
429 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
430 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); | |
431 | return 0; | |
16725b9d SW |
432 | } |
433 | ||
434 | /* | |
3d14c5d2 YS |
435 | * handle any mon messages the standard library doesn't understand. |
436 | * return error if we don't either. | |
16725b9d | 437 | */ |
3d14c5d2 | 438 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 439 | { |
3d14c5d2 YS |
440 | struct ceph_fs_client *fsc = client->private; |
441 | int type = le16_to_cpu(msg->hdr.type); | |
442 | ||
443 | switch (type) { | |
444 | case CEPH_MSG_MDS_MAP: | |
445 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
446 | return 0; | |
447 | ||
448 | default: | |
449 | return -1; | |
450 | } | |
451 | } | |
452 | ||
453 | /* | |
454 | * create a new fs client | |
455 | */ | |
0c6d4b4e | 456 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
457 | struct ceph_options *opt) |
458 | { | |
459 | struct ceph_fs_client *fsc; | |
6ab00d46 SW |
460 | const unsigned supported_features = |
461 | CEPH_FEATURE_FLOCK | | |
462 | CEPH_FEATURE_DIRLAYOUTHASH; | |
463 | const unsigned required_features = 0; | |
16725b9d SW |
464 | int err = -ENOMEM; |
465 | ||
3d14c5d2 YS |
466 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
467 | if (!fsc) | |
16725b9d SW |
468 | return ERR_PTR(-ENOMEM); |
469 | ||
6ab00d46 SW |
470 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
471 | required_features); | |
3d14c5d2 YS |
472 | if (IS_ERR(fsc->client)) { |
473 | err = PTR_ERR(fsc->client); | |
474 | goto fail; | |
475 | } | |
476 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
3d14c5d2 | 477 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 478 | |
3d14c5d2 | 479 | fsc->mount_options = fsopt; |
16725b9d | 480 | |
3d14c5d2 YS |
481 | fsc->sb = NULL; |
482 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 483 | |
3d14c5d2 | 484 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 485 | |
3d14c5d2 | 486 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 487 | if (err < 0) |
3d14c5d2 | 488 | goto fail_client; |
859e7b14 | 489 | |
16725b9d | 490 | err = -ENOMEM; |
01e6acc4 TH |
491 | /* |
492 | * The number of concurrent works can be high but they don't need | |
493 | * to be processed in parallel, limit concurrency. | |
494 | */ | |
495 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 496 | if (fsc->wb_wq == NULL) |
859e7b14 | 497 | goto fail_bdi; |
01e6acc4 | 498 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 499 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 500 | goto fail_wb_wq; |
01e6acc4 | 501 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 502 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
503 | goto fail_pg_inv_wq; |
504 | ||
b9bfb93c SW |
505 | /* set up mempools */ |
506 | err = -ENOMEM; | |
3d14c5d2 YS |
507 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, |
508 | fsc->mount_options->wsize >> PAGE_CACHE_SHIFT); | |
509 | if (!fsc->wb_pagevec_pool) | |
b9bfb93c SW |
510 | goto fail_trunc_wq; |
511 | ||
85ccce43 | 512 | /* caps */ |
3d14c5d2 YS |
513 | fsc->min_caps = fsopt->max_readdir; |
514 | ||
515 | return fsc; | |
b9bfb93c | 516 | |
16725b9d | 517 | fail_trunc_wq: |
3d14c5d2 | 518 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 519 | fail_pg_inv_wq: |
3d14c5d2 | 520 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 521 | fail_wb_wq: |
3d14c5d2 | 522 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 523 | fail_bdi: |
3d14c5d2 YS |
524 | bdi_destroy(&fsc->backing_dev_info); |
525 | fail_client: | |
526 | ceph_destroy_client(fsc->client); | |
16725b9d | 527 | fail: |
3d14c5d2 | 528 | kfree(fsc); |
16725b9d SW |
529 | return ERR_PTR(err); |
530 | } | |
531 | ||
0c6d4b4e | 532 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 533 | { |
3d14c5d2 | 534 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 535 | |
3d14c5d2 YS |
536 | destroy_workqueue(fsc->wb_wq); |
537 | destroy_workqueue(fsc->pg_inv_wq); | |
538 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 539 | |
3d14c5d2 | 540 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 541 | |
3d14c5d2 | 542 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 543 | |
3d14c5d2 | 544 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 545 | |
3d14c5d2 | 546 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 547 | |
3d14c5d2 | 548 | ceph_destroy_client(fsc->client); |
16725b9d | 549 | |
3d14c5d2 YS |
550 | kfree(fsc); |
551 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
552 | } |
553 | ||
0743304d | 554 | /* |
3d14c5d2 | 555 | * caches |
0743304d | 556 | */ |
3d14c5d2 YS |
557 | struct kmem_cache *ceph_inode_cachep; |
558 | struct kmem_cache *ceph_cap_cachep; | |
559 | struct kmem_cache *ceph_dentry_cachep; | |
560 | struct kmem_cache *ceph_file_cachep; | |
561 | ||
562 | static void ceph_inode_init_once(void *foo) | |
0743304d | 563 | { |
3d14c5d2 YS |
564 | struct ceph_inode_info *ci = foo; |
565 | inode_init_once(&ci->vfs_inode); | |
566 | } | |
567 | ||
568 | static int __init init_caches(void) | |
569 | { | |
570 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
571 | sizeof(struct ceph_inode_info), | |
572 | __alignof__(struct ceph_inode_info), | |
573 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
574 | ceph_inode_init_once); | |
575 | if (ceph_inode_cachep == NULL) | |
576 | return -ENOMEM; | |
577 | ||
578 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
579 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
580 | if (ceph_cap_cachep == NULL) | |
581 | goto bad_cap; | |
582 | ||
583 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
584 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
585 | if (ceph_dentry_cachep == NULL) | |
586 | goto bad_dentry; | |
587 | ||
588 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
589 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
590 | if (ceph_file_cachep == NULL) | |
591 | goto bad_file; | |
592 | ||
0743304d | 593 | return 0; |
3d14c5d2 YS |
594 | |
595 | bad_file: | |
596 | kmem_cache_destroy(ceph_dentry_cachep); | |
597 | bad_dentry: | |
598 | kmem_cache_destroy(ceph_cap_cachep); | |
599 | bad_cap: | |
600 | kmem_cache_destroy(ceph_inode_cachep); | |
601 | return -ENOMEM; | |
0743304d SW |
602 | } |
603 | ||
3d14c5d2 YS |
604 | static void destroy_caches(void) |
605 | { | |
8c0a8537 KS |
606 | /* |
607 | * Make sure all delayed rcu free inodes are flushed before we | |
608 | * destroy cache. | |
609 | */ | |
610 | rcu_barrier(); | |
3d14c5d2 YS |
611 | kmem_cache_destroy(ceph_inode_cachep); |
612 | kmem_cache_destroy(ceph_cap_cachep); | |
613 | kmem_cache_destroy(ceph_dentry_cachep); | |
614 | kmem_cache_destroy(ceph_file_cachep); | |
615 | } | |
616 | ||
617 | ||
16725b9d | 618 | /* |
3d14c5d2 YS |
619 | * ceph_umount_begin - initiate forced umount. Tear down down the |
620 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 621 | */ |
3d14c5d2 | 622 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 623 | { |
3d14c5d2 YS |
624 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
625 | ||
626 | dout("ceph_umount_begin - starting forced umount\n"); | |
627 | if (!fsc) | |
628 | return; | |
629 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
630 | return; | |
16725b9d SW |
631 | } |
632 | ||
3d14c5d2 YS |
633 | static const struct super_operations ceph_super_ops = { |
634 | .alloc_inode = ceph_alloc_inode, | |
635 | .destroy_inode = ceph_destroy_inode, | |
636 | .write_inode = ceph_write_inode, | |
637 | .sync_fs = ceph_sync_fs, | |
638 | .put_super = ceph_put_super, | |
639 | .show_options = ceph_show_options, | |
640 | .statfs = ceph_statfs, | |
641 | .umount_begin = ceph_umount_begin, | |
642 | }; | |
643 | ||
16725b9d SW |
644 | /* |
645 | * Bootstrap mount by opening the root directory. Note the mount | |
646 | * @started time from caller, and time out if this takes too long. | |
647 | */ | |
3d14c5d2 | 648 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
649 | const char *path, |
650 | unsigned long started) | |
651 | { | |
3d14c5d2 | 652 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
653 | struct ceph_mds_request *req = NULL; |
654 | int err; | |
655 | struct dentry *root; | |
656 | ||
657 | /* open dir */ | |
658 | dout("open_root_inode opening '%s'\n", path); | |
659 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
660 | if (IS_ERR(req)) | |
7e34bc52 | 661 | return ERR_CAST(req); |
16725b9d SW |
662 | req->r_path1 = kstrdup(path, GFP_NOFS); |
663 | req->r_ino1.ino = CEPH_INO_ROOT; | |
664 | req->r_ino1.snap = CEPH_NOSNAP; | |
665 | req->r_started = started; | |
3d14c5d2 | 666 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
667 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
668 | req->r_num_caps = 2; | |
669 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
670 | if (err == 0) { | |
3c5184ef AV |
671 | struct inode *inode = req->r_target_inode; |
672 | req->r_target_inode = NULL; | |
16725b9d | 673 | dout("open_root_inode success\n"); |
3c5184ef | 674 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 675 | fsc->sb->s_root == NULL) { |
48fde701 | 676 | root = d_make_root(inode); |
3c5184ef | 677 | if (!root) { |
3c5184ef AV |
678 | root = ERR_PTR(-ENOMEM); |
679 | goto out; | |
680 | } | |
774ac21d | 681 | } else { |
3c5184ef | 682 | root = d_obtain_alias(inode); |
774ac21d | 683 | } |
d46cfba5 | 684 | ceph_init_dentry(root); |
16725b9d SW |
685 | dout("open_root_inode success, root dentry is %p\n", root); |
686 | } else { | |
687 | root = ERR_PTR(err); | |
688 | } | |
3c5184ef | 689 | out: |
16725b9d SW |
690 | ceph_mdsc_put_request(req); |
691 | return root; | |
692 | } | |
693 | ||
3d14c5d2 YS |
694 | |
695 | ||
696 | ||
16725b9d SW |
697 | /* |
698 | * mount: join the ceph cluster, and open root directory. | |
699 | */ | |
a7f9fb20 | 700 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
701 | const char *path) |
702 | { | |
16725b9d | 703 | int err; |
16725b9d SW |
704 | unsigned long started = jiffies; /* note the start time */ |
705 | struct dentry *root; | |
3d14c5d2 | 706 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
707 | |
708 | dout("mount start\n"); | |
3d14c5d2 | 709 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 710 | |
3d14c5d2 | 711 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
712 | if (err < 0) |
713 | goto out; | |
714 | ||
16725b9d | 715 | dout("mount opening root\n"); |
3d14c5d2 | 716 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
717 | if (IS_ERR(root)) { |
718 | err = PTR_ERR(root); | |
719 | goto out; | |
720 | } | |
3d14c5d2 | 721 | if (fsc->sb->s_root) { |
16725b9d | 722 | dput(root); |
3d14c5d2 YS |
723 | } else { |
724 | fsc->sb->s_root = root; | |
725 | first = 1; | |
726 | ||
727 | err = ceph_fs_debugfs_init(fsc); | |
728 | if (err < 0) | |
729 | goto fail; | |
730 | } | |
16725b9d SW |
731 | |
732 | if (path[0] == 0) { | |
733 | dget(root); | |
734 | } else { | |
735 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 736 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
737 | if (IS_ERR(root)) { |
738 | err = PTR_ERR(root); | |
3d14c5d2 | 739 | goto fail; |
16725b9d SW |
740 | } |
741 | } | |
742 | ||
3d14c5d2 | 743 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 744 | dout("mount success\n"); |
a7f9fb20 AV |
745 | mutex_unlock(&fsc->client->mount_mutex); |
746 | return root; | |
16725b9d SW |
747 | |
748 | out: | |
3d14c5d2 | 749 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 750 | return ERR_PTR(err); |
3d14c5d2 YS |
751 | |
752 | fail: | |
753 | if (first) { | |
754 | dput(fsc->sb->s_root); | |
755 | fsc->sb->s_root = NULL; | |
756 | } | |
757 | goto out; | |
16725b9d SW |
758 | } |
759 | ||
760 | static int ceph_set_super(struct super_block *s, void *data) | |
761 | { | |
3d14c5d2 | 762 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
763 | int ret; |
764 | ||
765 | dout("set_super %p data %p\n", s, data); | |
766 | ||
3d14c5d2 | 767 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
768 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
769 | ||
3d14c5d2 YS |
770 | s->s_fs_info = fsc; |
771 | fsc->sb = s; | |
16725b9d SW |
772 | |
773 | s->s_op = &ceph_super_ops; | |
774 | s->s_export_op = &ceph_export_ops; | |
775 | ||
776 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
777 | ||
778 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
779 | if (ret != 0) | |
780 | goto fail; | |
781 | ||
782 | return ret; | |
783 | ||
784 | fail: | |
785 | s->s_fs_info = NULL; | |
3d14c5d2 | 786 | fsc->sb = NULL; |
16725b9d SW |
787 | return ret; |
788 | } | |
789 | ||
790 | /* | |
791 | * share superblock if same fs AND options | |
792 | */ | |
793 | static int ceph_compare_super(struct super_block *sb, void *data) | |
794 | { | |
3d14c5d2 YS |
795 | struct ceph_fs_client *new = data; |
796 | struct ceph_mount_options *fsopt = new->mount_options; | |
797 | struct ceph_options *opt = new->client->options; | |
798 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
799 | |
800 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
801 | |
802 | if (compare_mount_options(fsopt, opt, other)) { | |
803 | dout("monitor(s)/mount options don't match\n"); | |
804 | return 0; | |
16725b9d | 805 | } |
3d14c5d2 YS |
806 | if ((opt->flags & CEPH_OPT_FSID) && |
807 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
808 | dout("fsid doesn't match\n"); | |
809 | return 0; | |
810 | } | |
811 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
812 | dout("flags differ\n"); |
813 | return 0; | |
814 | } | |
815 | return 1; | |
816 | } | |
817 | ||
818 | /* | |
819 | * construct our own bdi so we can control readahead, etc. | |
820 | */ | |
00d5643e | 821 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 822 | |
3d14c5d2 YS |
823 | static int ceph_register_bdi(struct super_block *sb, |
824 | struct ceph_fs_client *fsc) | |
16725b9d SW |
825 | { |
826 | int err; | |
827 | ||
83817e35 SW |
828 | /* set ra_pages based on rasize mount option? */ |
829 | if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE) | |
3d14c5d2 | 830 | fsc->backing_dev_info.ra_pages = |
83817e35 | 831 | (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1) |
16725b9d | 832 | >> PAGE_SHIFT; |
e9852227 YS |
833 | else |
834 | fsc->backing_dev_info.ra_pages = | |
835 | default_backing_dev_info.ra_pages; | |
836 | ||
3d14c5d2 | 837 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d", |
31e0cf8f | 838 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 839 | if (!err) |
3d14c5d2 | 840 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
841 | return err; |
842 | } | |
843 | ||
a7f9fb20 AV |
844 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
845 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
846 | { |
847 | struct super_block *sb; | |
3d14c5d2 | 848 | struct ceph_fs_client *fsc; |
a7f9fb20 | 849 | struct dentry *res; |
16725b9d SW |
850 | int err; |
851 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 852 | const char *path = NULL; |
3d14c5d2 YS |
853 | struct ceph_mount_options *fsopt = NULL; |
854 | struct ceph_options *opt = NULL; | |
16725b9d | 855 | |
a7f9fb20 | 856 | dout("ceph_mount\n"); |
3d14c5d2 | 857 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
858 | if (err < 0) { |
859 | res = ERR_PTR(err); | |
6b805185 | 860 | goto out_final; |
a7f9fb20 | 861 | } |
16725b9d SW |
862 | |
863 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
864 | fsc = create_fs_client(fsopt, opt); |
865 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 866 | res = ERR_CAST(fsc); |
259a187a NW |
867 | destroy_mount_options(fsopt); |
868 | ceph_destroy_options(opt); | |
6b805185 SW |
869 | goto out_final; |
870 | } | |
16725b9d | 871 | |
3d14c5d2 | 872 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
873 | if (err < 0) { |
874 | res = ERR_PTR(err); | |
3d14c5d2 | 875 | goto out; |
a7f9fb20 | 876 | } |
3d14c5d2 YS |
877 | |
878 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 879 | compare_super = NULL; |
9249e17f | 880 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 881 | if (IS_ERR(sb)) { |
a7f9fb20 | 882 | res = ERR_CAST(sb); |
16725b9d SW |
883 | goto out; |
884 | } | |
885 | ||
3d14c5d2 YS |
886 | if (ceph_sb_to_client(sb) != fsc) { |
887 | ceph_mdsc_destroy(fsc); | |
888 | destroy_fs_client(fsc); | |
889 | fsc = ceph_sb_to_client(sb); | |
890 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 891 | } else { |
3d14c5d2 YS |
892 | dout("get_sb using new client %p\n", fsc); |
893 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
894 | if (err < 0) { |
895 | res = ERR_PTR(err); | |
16725b9d | 896 | goto out_splat; |
a7f9fb20 | 897 | } |
16725b9d SW |
898 | } |
899 | ||
a7f9fb20 AV |
900 | res = ceph_real_mount(fsc, path); |
901 | if (IS_ERR(res)) | |
16725b9d | 902 | goto out_splat; |
a7f9fb20 AV |
903 | dout("root %p inode %p ino %llx.%llx\n", res, |
904 | res->d_inode, ceph_vinop(res->d_inode)); | |
905 | return res; | |
16725b9d SW |
906 | |
907 | out_splat: | |
3d14c5d2 | 908 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 909 | deactivate_locked_super(sb); |
16725b9d SW |
910 | goto out_final; |
911 | ||
912 | out: | |
3d14c5d2 YS |
913 | ceph_mdsc_destroy(fsc); |
914 | destroy_fs_client(fsc); | |
16725b9d | 915 | out_final: |
a7f9fb20 AV |
916 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
917 | return res; | |
16725b9d SW |
918 | } |
919 | ||
920 | static void ceph_kill_sb(struct super_block *s) | |
921 | { | |
3d14c5d2 | 922 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 923 | dout("kill_sb %p\n", s); |
3d14c5d2 | 924 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 925 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
926 | ceph_mdsc_destroy(fsc); |
927 | destroy_fs_client(fsc); | |
16725b9d SW |
928 | } |
929 | ||
930 | static struct file_system_type ceph_fs_type = { | |
931 | .owner = THIS_MODULE, | |
932 | .name = "ceph", | |
a7f9fb20 | 933 | .mount = ceph_mount, |
16725b9d SW |
934 | .kill_sb = ceph_kill_sb, |
935 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
936 | }; | |
937 | ||
938 | #define _STRINGIFY(x) #x | |
939 | #define STRINGIFY(x) _STRINGIFY(x) | |
940 | ||
941 | static int __init init_ceph(void) | |
942 | { | |
3d14c5d2 | 943 | int ret = init_caches(); |
16725b9d | 944 | if (ret) |
3d14c5d2 | 945 | goto out; |
16725b9d | 946 | |
3ce6cd12 | 947 | ceph_xattr_init(); |
16725b9d SW |
948 | ret = register_filesystem(&ceph_fs_type); |
949 | if (ret) | |
950 | goto out_icache; | |
951 | ||
3d14c5d2 YS |
952 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
953 | ||
16725b9d SW |
954 | return 0; |
955 | ||
956 | out_icache: | |
3ce6cd12 | 957 | ceph_xattr_exit(); |
16725b9d | 958 | destroy_caches(); |
16725b9d SW |
959 | out: |
960 | return ret; | |
961 | } | |
962 | ||
963 | static void __exit exit_ceph(void) | |
964 | { | |
965 | dout("exit_ceph\n"); | |
966 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 967 | ceph_xattr_exit(); |
16725b9d | 968 | destroy_caches(); |
16725b9d SW |
969 | } |
970 | ||
971 | module_init(init_ceph); | |
972 | module_exit(exit_ceph); | |
973 | ||
974 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
975 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
976 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
977 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
978 | MODULE_LICENSE("GPL"); |