]>
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; | |
c98f533c AE |
310 | int err; |
311 | ||
312 | if (!dev_name || !*dev_name) | |
313 | return -EINVAL; | |
3d14c5d2 YS |
314 | |
315 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
316 | if (!fsopt) | |
317 | return -ENOMEM; | |
318 | ||
319 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
320 | ||
80db8bea NW |
321 | fsopt->sb_flags = flags; |
322 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 323 | |
80db8bea NW |
324 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
325 | fsopt->rasize = CEPH_RASIZE_DEFAULT; | |
326 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
50aac4fe SW |
327 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
328 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
329 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
330 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
331 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
332 | fsopt->congestion_kb = default_congestion_kb(); | |
333 | ||
c98f533c AE |
334 | /* |
335 | * Distinguish the server list from the path in "dev_name". | |
336 | * Internally we do not include the leading '/' in the path. | |
337 | * | |
338 | * "dev_name" will look like: | |
339 | * <server_spec>[,<server_spec>...]:[<path>] | |
340 | * where | |
341 | * <server_spec> is <ip>[:<port>] | |
342 | * <path> is optional, but if present must begin with '/' | |
343 | */ | |
344 | dev_name_end = strchr(dev_name, '/'); | |
345 | if (dev_name_end) { | |
346 | /* skip over leading '/' for path */ | |
347 | *path = dev_name_end + 1; | |
348 | } else { | |
349 | /* path is empty */ | |
350 | dev_name_end = dev_name + strlen(dev_name); | |
351 | *path = dev_name_end; | |
352 | } | |
80db8bea | 353 | err = -EINVAL; |
c98f533c AE |
354 | dev_name_end--; /* back up to ':' separator */ |
355 | if (*dev_name_end != ':') { | |
356 | pr_err("device name is missing path (no : separator in %s)\n", | |
80db8bea NW |
357 | dev_name); |
358 | goto out; | |
359 | } | |
3d14c5d2 | 360 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
16725b9d SW |
361 | dout("server path '%s'\n", *path); |
362 | ||
ee57741c | 363 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 364 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
365 | if (IS_ERR(*popt)) { |
366 | err = PTR_ERR(*popt); | |
3d14c5d2 | 367 | goto out; |
ee57741c | 368 | } |
3d14c5d2 YS |
369 | |
370 | /* success */ | |
371 | *pfsopt = fsopt; | |
372 | return 0; | |
16725b9d | 373 | |
7b813c46 | 374 | out: |
3d14c5d2 YS |
375 | destroy_mount_options(fsopt); |
376 | return err; | |
16725b9d SW |
377 | } |
378 | ||
3d14c5d2 YS |
379 | /** |
380 | * ceph_show_options - Show mount options in /proc/mounts | |
381 | * @m: seq_file to write to | |
34c80b1d | 382 | * @root: root of that (sub)tree |
3d14c5d2 | 383 | */ |
34c80b1d | 384 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 385 | { |
34c80b1d | 386 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 YS |
387 | struct ceph_mount_options *fsopt = fsc->mount_options; |
388 | struct ceph_options *opt = fsc->client->options; | |
389 | ||
390 | if (opt->flags & CEPH_OPT_FSID) | |
391 | seq_printf(m, ",fsid=%pU", &opt->fsid); | |
392 | if (opt->flags & CEPH_OPT_NOSHARE) | |
393 | seq_puts(m, ",noshare"); | |
394 | if (opt->flags & CEPH_OPT_NOCRC) | |
395 | seq_puts(m, ",nocrc"); | |
396 | ||
397 | if (opt->name) | |
398 | seq_printf(m, ",name=%s", opt->name); | |
8323c3aa | 399 | if (opt->key) |
3d14c5d2 YS |
400 | seq_puts(m, ",secret=<hidden>"); |
401 | ||
402 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
403 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); | |
404 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
405 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); | |
3d14c5d2 YS |
406 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) |
407 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
408 | opt->osd_keepalive_timeout); | |
409 | ||
410 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
411 | seq_puts(m, ",dirstat"); | |
412 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) | |
413 | seq_puts(m, ",norbytes"); | |
414 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) | |
415 | seq_puts(m, ",noasyncreaddir"); | |
a40dc6cc SW |
416 | if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE) |
417 | seq_puts(m, ",dcache"); | |
418 | else | |
419 | seq_puts(m, ",nodcache"); | |
3d14c5d2 YS |
420 | |
421 | if (fsopt->wsize) | |
422 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 423 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 | 424 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 425 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 426 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
427 | if (fsopt->congestion_kb != default_congestion_kb()) |
428 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
429 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
430 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
431 | fsopt->caps_wanted_delay_min); | |
432 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
433 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
434 | fsopt->caps_wanted_delay_max); | |
435 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
436 | seq_printf(m, ",cap_release_safety=%d", | |
437 | fsopt->cap_release_safety); | |
438 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
439 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
440 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
441 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
442 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
443 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); | |
444 | return 0; | |
16725b9d SW |
445 | } |
446 | ||
447 | /* | |
3d14c5d2 YS |
448 | * handle any mon messages the standard library doesn't understand. |
449 | * return error if we don't either. | |
16725b9d | 450 | */ |
3d14c5d2 | 451 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 452 | { |
3d14c5d2 YS |
453 | struct ceph_fs_client *fsc = client->private; |
454 | int type = le16_to_cpu(msg->hdr.type); | |
455 | ||
456 | switch (type) { | |
457 | case CEPH_MSG_MDS_MAP: | |
458 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
459 | return 0; | |
460 | ||
461 | default: | |
462 | return -1; | |
463 | } | |
464 | } | |
465 | ||
466 | /* | |
467 | * create a new fs client | |
468 | */ | |
0c6d4b4e | 469 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
470 | struct ceph_options *opt) |
471 | { | |
472 | struct ceph_fs_client *fsc; | |
6ab00d46 SW |
473 | const unsigned supported_features = |
474 | CEPH_FEATURE_FLOCK | | |
475 | CEPH_FEATURE_DIRLAYOUTHASH; | |
476 | const unsigned required_features = 0; | |
16725b9d SW |
477 | int err = -ENOMEM; |
478 | ||
3d14c5d2 YS |
479 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
480 | if (!fsc) | |
16725b9d SW |
481 | return ERR_PTR(-ENOMEM); |
482 | ||
6ab00d46 SW |
483 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
484 | required_features); | |
3d14c5d2 YS |
485 | if (IS_ERR(fsc->client)) { |
486 | err = PTR_ERR(fsc->client); | |
487 | goto fail; | |
488 | } | |
489 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
3d14c5d2 | 490 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 491 | |
3d14c5d2 | 492 | fsc->mount_options = fsopt; |
16725b9d | 493 | |
3d14c5d2 YS |
494 | fsc->sb = NULL; |
495 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 496 | |
3d14c5d2 | 497 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 498 | |
3d14c5d2 | 499 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 500 | if (err < 0) |
3d14c5d2 | 501 | goto fail_client; |
859e7b14 | 502 | |
16725b9d | 503 | err = -ENOMEM; |
01e6acc4 TH |
504 | /* |
505 | * The number of concurrent works can be high but they don't need | |
506 | * to be processed in parallel, limit concurrency. | |
507 | */ | |
508 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 509 | if (fsc->wb_wq == NULL) |
859e7b14 | 510 | goto fail_bdi; |
01e6acc4 | 511 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 512 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 513 | goto fail_wb_wq; |
01e6acc4 | 514 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 515 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
516 | goto fail_pg_inv_wq; |
517 | ||
b9bfb93c SW |
518 | /* set up mempools */ |
519 | err = -ENOMEM; | |
3d14c5d2 YS |
520 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, |
521 | fsc->mount_options->wsize >> PAGE_CACHE_SHIFT); | |
522 | if (!fsc->wb_pagevec_pool) | |
b9bfb93c SW |
523 | goto fail_trunc_wq; |
524 | ||
85ccce43 | 525 | /* caps */ |
3d14c5d2 YS |
526 | fsc->min_caps = fsopt->max_readdir; |
527 | ||
528 | return fsc; | |
b9bfb93c | 529 | |
16725b9d | 530 | fail_trunc_wq: |
3d14c5d2 | 531 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 532 | fail_pg_inv_wq: |
3d14c5d2 | 533 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 534 | fail_wb_wq: |
3d14c5d2 | 535 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 536 | fail_bdi: |
3d14c5d2 YS |
537 | bdi_destroy(&fsc->backing_dev_info); |
538 | fail_client: | |
539 | ceph_destroy_client(fsc->client); | |
16725b9d | 540 | fail: |
3d14c5d2 | 541 | kfree(fsc); |
16725b9d SW |
542 | return ERR_PTR(err); |
543 | } | |
544 | ||
0c6d4b4e | 545 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 546 | { |
3d14c5d2 | 547 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 548 | |
3d14c5d2 YS |
549 | destroy_workqueue(fsc->wb_wq); |
550 | destroy_workqueue(fsc->pg_inv_wq); | |
551 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 552 | |
3d14c5d2 | 553 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 554 | |
3d14c5d2 | 555 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 556 | |
3d14c5d2 | 557 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 558 | |
3d14c5d2 | 559 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 560 | |
3d14c5d2 | 561 | ceph_destroy_client(fsc->client); |
16725b9d | 562 | |
3d14c5d2 YS |
563 | kfree(fsc); |
564 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
565 | } |
566 | ||
0743304d | 567 | /* |
3d14c5d2 | 568 | * caches |
0743304d | 569 | */ |
3d14c5d2 YS |
570 | struct kmem_cache *ceph_inode_cachep; |
571 | struct kmem_cache *ceph_cap_cachep; | |
572 | struct kmem_cache *ceph_dentry_cachep; | |
573 | struct kmem_cache *ceph_file_cachep; | |
574 | ||
575 | static void ceph_inode_init_once(void *foo) | |
0743304d | 576 | { |
3d14c5d2 YS |
577 | struct ceph_inode_info *ci = foo; |
578 | inode_init_once(&ci->vfs_inode); | |
579 | } | |
580 | ||
581 | static int __init init_caches(void) | |
582 | { | |
583 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
584 | sizeof(struct ceph_inode_info), | |
585 | __alignof__(struct ceph_inode_info), | |
586 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
587 | ceph_inode_init_once); | |
588 | if (ceph_inode_cachep == NULL) | |
589 | return -ENOMEM; | |
590 | ||
591 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
592 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
593 | if (ceph_cap_cachep == NULL) | |
594 | goto bad_cap; | |
595 | ||
596 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
597 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
598 | if (ceph_dentry_cachep == NULL) | |
599 | goto bad_dentry; | |
600 | ||
601 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
602 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
603 | if (ceph_file_cachep == NULL) | |
604 | goto bad_file; | |
605 | ||
0743304d | 606 | return 0; |
3d14c5d2 YS |
607 | |
608 | bad_file: | |
609 | kmem_cache_destroy(ceph_dentry_cachep); | |
610 | bad_dentry: | |
611 | kmem_cache_destroy(ceph_cap_cachep); | |
612 | bad_cap: | |
613 | kmem_cache_destroy(ceph_inode_cachep); | |
614 | return -ENOMEM; | |
0743304d SW |
615 | } |
616 | ||
3d14c5d2 YS |
617 | static void destroy_caches(void) |
618 | { | |
8c0a8537 KS |
619 | /* |
620 | * Make sure all delayed rcu free inodes are flushed before we | |
621 | * destroy cache. | |
622 | */ | |
623 | rcu_barrier(); | |
3d14c5d2 YS |
624 | kmem_cache_destroy(ceph_inode_cachep); |
625 | kmem_cache_destroy(ceph_cap_cachep); | |
626 | kmem_cache_destroy(ceph_dentry_cachep); | |
627 | kmem_cache_destroy(ceph_file_cachep); | |
628 | } | |
629 | ||
630 | ||
16725b9d | 631 | /* |
3d14c5d2 YS |
632 | * ceph_umount_begin - initiate forced umount. Tear down down the |
633 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 634 | */ |
3d14c5d2 | 635 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 636 | { |
3d14c5d2 YS |
637 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
638 | ||
639 | dout("ceph_umount_begin - starting forced umount\n"); | |
640 | if (!fsc) | |
641 | return; | |
642 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
643 | return; | |
16725b9d SW |
644 | } |
645 | ||
3d14c5d2 YS |
646 | static const struct super_operations ceph_super_ops = { |
647 | .alloc_inode = ceph_alloc_inode, | |
648 | .destroy_inode = ceph_destroy_inode, | |
649 | .write_inode = ceph_write_inode, | |
650 | .sync_fs = ceph_sync_fs, | |
651 | .put_super = ceph_put_super, | |
652 | .show_options = ceph_show_options, | |
653 | .statfs = ceph_statfs, | |
654 | .umount_begin = ceph_umount_begin, | |
655 | }; | |
656 | ||
16725b9d SW |
657 | /* |
658 | * Bootstrap mount by opening the root directory. Note the mount | |
659 | * @started time from caller, and time out if this takes too long. | |
660 | */ | |
3d14c5d2 | 661 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
662 | const char *path, |
663 | unsigned long started) | |
664 | { | |
3d14c5d2 | 665 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
666 | struct ceph_mds_request *req = NULL; |
667 | int err; | |
668 | struct dentry *root; | |
669 | ||
670 | /* open dir */ | |
671 | dout("open_root_inode opening '%s'\n", path); | |
672 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
673 | if (IS_ERR(req)) | |
7e34bc52 | 674 | return ERR_CAST(req); |
16725b9d SW |
675 | req->r_path1 = kstrdup(path, GFP_NOFS); |
676 | req->r_ino1.ino = CEPH_INO_ROOT; | |
677 | req->r_ino1.snap = CEPH_NOSNAP; | |
678 | req->r_started = started; | |
3d14c5d2 | 679 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
680 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
681 | req->r_num_caps = 2; | |
682 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
683 | if (err == 0) { | |
3c5184ef AV |
684 | struct inode *inode = req->r_target_inode; |
685 | req->r_target_inode = NULL; | |
16725b9d | 686 | dout("open_root_inode success\n"); |
3c5184ef | 687 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 688 | fsc->sb->s_root == NULL) { |
48fde701 | 689 | root = d_make_root(inode); |
3c5184ef | 690 | if (!root) { |
3c5184ef AV |
691 | root = ERR_PTR(-ENOMEM); |
692 | goto out; | |
693 | } | |
774ac21d | 694 | } else { |
3c5184ef | 695 | root = d_obtain_alias(inode); |
774ac21d | 696 | } |
d46cfba5 | 697 | ceph_init_dentry(root); |
16725b9d SW |
698 | dout("open_root_inode success, root dentry is %p\n", root); |
699 | } else { | |
700 | root = ERR_PTR(err); | |
701 | } | |
3c5184ef | 702 | out: |
16725b9d SW |
703 | ceph_mdsc_put_request(req); |
704 | return root; | |
705 | } | |
706 | ||
3d14c5d2 YS |
707 | |
708 | ||
709 | ||
16725b9d SW |
710 | /* |
711 | * mount: join the ceph cluster, and open root directory. | |
712 | */ | |
a7f9fb20 | 713 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
714 | const char *path) |
715 | { | |
16725b9d | 716 | int err; |
16725b9d SW |
717 | unsigned long started = jiffies; /* note the start time */ |
718 | struct dentry *root; | |
3d14c5d2 | 719 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
720 | |
721 | dout("mount start\n"); | |
3d14c5d2 | 722 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 723 | |
3d14c5d2 | 724 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
725 | if (err < 0) |
726 | goto out; | |
727 | ||
16725b9d | 728 | dout("mount opening root\n"); |
3d14c5d2 | 729 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
730 | if (IS_ERR(root)) { |
731 | err = PTR_ERR(root); | |
732 | goto out; | |
733 | } | |
3d14c5d2 | 734 | if (fsc->sb->s_root) { |
16725b9d | 735 | dput(root); |
3d14c5d2 YS |
736 | } else { |
737 | fsc->sb->s_root = root; | |
738 | first = 1; | |
739 | ||
740 | err = ceph_fs_debugfs_init(fsc); | |
741 | if (err < 0) | |
742 | goto fail; | |
743 | } | |
16725b9d SW |
744 | |
745 | if (path[0] == 0) { | |
746 | dget(root); | |
747 | } else { | |
748 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 749 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
750 | if (IS_ERR(root)) { |
751 | err = PTR_ERR(root); | |
3d14c5d2 | 752 | goto fail; |
16725b9d SW |
753 | } |
754 | } | |
755 | ||
3d14c5d2 | 756 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 757 | dout("mount success\n"); |
a7f9fb20 AV |
758 | mutex_unlock(&fsc->client->mount_mutex); |
759 | return root; | |
16725b9d SW |
760 | |
761 | out: | |
3d14c5d2 | 762 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 763 | return ERR_PTR(err); |
3d14c5d2 YS |
764 | |
765 | fail: | |
766 | if (first) { | |
767 | dput(fsc->sb->s_root); | |
768 | fsc->sb->s_root = NULL; | |
769 | } | |
770 | goto out; | |
16725b9d SW |
771 | } |
772 | ||
773 | static int ceph_set_super(struct super_block *s, void *data) | |
774 | { | |
3d14c5d2 | 775 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
776 | int ret; |
777 | ||
778 | dout("set_super %p data %p\n", s, data); | |
779 | ||
3d14c5d2 | 780 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
781 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
782 | ||
3d14c5d2 YS |
783 | s->s_fs_info = fsc; |
784 | fsc->sb = s; | |
16725b9d SW |
785 | |
786 | s->s_op = &ceph_super_ops; | |
787 | s->s_export_op = &ceph_export_ops; | |
788 | ||
789 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
790 | ||
791 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
792 | if (ret != 0) | |
793 | goto fail; | |
794 | ||
795 | return ret; | |
796 | ||
797 | fail: | |
798 | s->s_fs_info = NULL; | |
3d14c5d2 | 799 | fsc->sb = NULL; |
16725b9d SW |
800 | return ret; |
801 | } | |
802 | ||
803 | /* | |
804 | * share superblock if same fs AND options | |
805 | */ | |
806 | static int ceph_compare_super(struct super_block *sb, void *data) | |
807 | { | |
3d14c5d2 YS |
808 | struct ceph_fs_client *new = data; |
809 | struct ceph_mount_options *fsopt = new->mount_options; | |
810 | struct ceph_options *opt = new->client->options; | |
811 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
812 | |
813 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
814 | |
815 | if (compare_mount_options(fsopt, opt, other)) { | |
816 | dout("monitor(s)/mount options don't match\n"); | |
817 | return 0; | |
16725b9d | 818 | } |
3d14c5d2 YS |
819 | if ((opt->flags & CEPH_OPT_FSID) && |
820 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
821 | dout("fsid doesn't match\n"); | |
822 | return 0; | |
823 | } | |
824 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
825 | dout("flags differ\n"); |
826 | return 0; | |
827 | } | |
828 | return 1; | |
829 | } | |
830 | ||
831 | /* | |
832 | * construct our own bdi so we can control readahead, etc. | |
833 | */ | |
00d5643e | 834 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 835 | |
3d14c5d2 YS |
836 | static int ceph_register_bdi(struct super_block *sb, |
837 | struct ceph_fs_client *fsc) | |
16725b9d SW |
838 | { |
839 | int err; | |
840 | ||
83817e35 SW |
841 | /* set ra_pages based on rasize mount option? */ |
842 | if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE) | |
3d14c5d2 | 843 | fsc->backing_dev_info.ra_pages = |
83817e35 | 844 | (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1) |
16725b9d | 845 | >> PAGE_SHIFT; |
e9852227 YS |
846 | else |
847 | fsc->backing_dev_info.ra_pages = | |
848 | default_backing_dev_info.ra_pages; | |
849 | ||
d2cc4dde | 850 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
31e0cf8f | 851 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 852 | if (!err) |
3d14c5d2 | 853 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
854 | return err; |
855 | } | |
856 | ||
a7f9fb20 AV |
857 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
858 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
859 | { |
860 | struct super_block *sb; | |
3d14c5d2 | 861 | struct ceph_fs_client *fsc; |
a7f9fb20 | 862 | struct dentry *res; |
16725b9d SW |
863 | int err; |
864 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 865 | const char *path = NULL; |
3d14c5d2 YS |
866 | struct ceph_mount_options *fsopt = NULL; |
867 | struct ceph_options *opt = NULL; | |
16725b9d | 868 | |
a7f9fb20 | 869 | dout("ceph_mount\n"); |
3d14c5d2 | 870 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
871 | if (err < 0) { |
872 | res = ERR_PTR(err); | |
6b805185 | 873 | goto out_final; |
a7f9fb20 | 874 | } |
16725b9d SW |
875 | |
876 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
877 | fsc = create_fs_client(fsopt, opt); |
878 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 879 | res = ERR_CAST(fsc); |
259a187a NW |
880 | destroy_mount_options(fsopt); |
881 | ceph_destroy_options(opt); | |
6b805185 SW |
882 | goto out_final; |
883 | } | |
16725b9d | 884 | |
3d14c5d2 | 885 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
886 | if (err < 0) { |
887 | res = ERR_PTR(err); | |
3d14c5d2 | 888 | goto out; |
a7f9fb20 | 889 | } |
3d14c5d2 YS |
890 | |
891 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 892 | compare_super = NULL; |
9249e17f | 893 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 894 | if (IS_ERR(sb)) { |
a7f9fb20 | 895 | res = ERR_CAST(sb); |
16725b9d SW |
896 | goto out; |
897 | } | |
898 | ||
3d14c5d2 YS |
899 | if (ceph_sb_to_client(sb) != fsc) { |
900 | ceph_mdsc_destroy(fsc); | |
901 | destroy_fs_client(fsc); | |
902 | fsc = ceph_sb_to_client(sb); | |
903 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 904 | } else { |
3d14c5d2 YS |
905 | dout("get_sb using new client %p\n", fsc); |
906 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
907 | if (err < 0) { |
908 | res = ERR_PTR(err); | |
16725b9d | 909 | goto out_splat; |
a7f9fb20 | 910 | } |
16725b9d SW |
911 | } |
912 | ||
a7f9fb20 AV |
913 | res = ceph_real_mount(fsc, path); |
914 | if (IS_ERR(res)) | |
16725b9d | 915 | goto out_splat; |
a7f9fb20 AV |
916 | dout("root %p inode %p ino %llx.%llx\n", res, |
917 | res->d_inode, ceph_vinop(res->d_inode)); | |
918 | return res; | |
16725b9d SW |
919 | |
920 | out_splat: | |
3d14c5d2 | 921 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 922 | deactivate_locked_super(sb); |
16725b9d SW |
923 | goto out_final; |
924 | ||
925 | out: | |
3d14c5d2 YS |
926 | ceph_mdsc_destroy(fsc); |
927 | destroy_fs_client(fsc); | |
16725b9d | 928 | out_final: |
a7f9fb20 AV |
929 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
930 | return res; | |
16725b9d SW |
931 | } |
932 | ||
933 | static void ceph_kill_sb(struct super_block *s) | |
934 | { | |
3d14c5d2 | 935 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 936 | dout("kill_sb %p\n", s); |
3d14c5d2 | 937 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 938 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
939 | ceph_mdsc_destroy(fsc); |
940 | destroy_fs_client(fsc); | |
16725b9d SW |
941 | } |
942 | ||
943 | static struct file_system_type ceph_fs_type = { | |
944 | .owner = THIS_MODULE, | |
945 | .name = "ceph", | |
a7f9fb20 | 946 | .mount = ceph_mount, |
16725b9d SW |
947 | .kill_sb = ceph_kill_sb, |
948 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
949 | }; | |
950 | ||
951 | #define _STRINGIFY(x) #x | |
952 | #define STRINGIFY(x) _STRINGIFY(x) | |
953 | ||
954 | static int __init init_ceph(void) | |
955 | { | |
3d14c5d2 | 956 | int ret = init_caches(); |
16725b9d | 957 | if (ret) |
3d14c5d2 | 958 | goto out; |
16725b9d | 959 | |
3ce6cd12 | 960 | ceph_xattr_init(); |
16725b9d SW |
961 | ret = register_filesystem(&ceph_fs_type); |
962 | if (ret) | |
963 | goto out_icache; | |
964 | ||
3d14c5d2 YS |
965 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
966 | ||
16725b9d SW |
967 | return 0; |
968 | ||
969 | out_icache: | |
3ce6cd12 | 970 | ceph_xattr_exit(); |
16725b9d | 971 | destroy_caches(); |
16725b9d SW |
972 | out: |
973 | return ret; | |
974 | } | |
975 | ||
976 | static void __exit exit_ceph(void) | |
977 | { | |
978 | dout("exit_ceph\n"); | |
979 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 980 | ceph_xattr_exit(); |
16725b9d | 981 | destroy_caches(); |
16725b9d SW |
982 | } |
983 | ||
984 | module_init(init_ceph); | |
985 | module_exit(exit_ceph); | |
986 | ||
987 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
988 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
989 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
990 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
991 | MODULE_LICENSE("GPL"); |