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 | 19 | #include "mds_client.h" |
99ccbd22 | 20 | #include "cache.h" |
3d14c5d2 | 21 | |
1fe60e51 | 22 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
23 | #include <linux/ceph/decode.h> |
24 | #include <linux/ceph/mon_client.h> | |
25 | #include <linux/ceph/auth.h> | |
26 | #include <linux/ceph/debugfs.h> | |
16725b9d SW |
27 | |
28 | /* | |
29 | * Ceph superblock operations | |
30 | * | |
31 | * Handle the basics of mounting, unmounting. | |
32 | */ | |
33 | ||
16725b9d SW |
34 | /* |
35 | * super ops | |
36 | */ | |
37 | static void ceph_put_super(struct super_block *s) | |
38 | { | |
3d14c5d2 | 39 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d SW |
40 | |
41 | dout("put_super\n"); | |
3d14c5d2 | 42 | ceph_mdsc_close_sessions(fsc->mdsc); |
5dfc589a SW |
43 | |
44 | /* | |
45 | * ensure we release the bdi before put_anon_super releases | |
46 | * the device name. | |
47 | */ | |
3d14c5d2 YS |
48 | if (s->s_bdi == &fsc->backing_dev_info) { |
49 | bdi_unregister(&fsc->backing_dev_info); | |
5dfc589a SW |
50 | s->s_bdi = NULL; |
51 | } | |
52 | ||
16725b9d SW |
53 | return; |
54 | } | |
55 | ||
56 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
57 | { | |
3d14c5d2 YS |
58 | struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode); |
59 | struct ceph_monmap *monmap = fsc->client->monc.monmap; | |
16725b9d SW |
60 | struct ceph_statfs st; |
61 | u64 fsid; | |
62 | int err; | |
63 | ||
64 | dout("statfs\n"); | |
3d14c5d2 | 65 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
16725b9d SW |
66 | if (err < 0) |
67 | return err; | |
68 | ||
69 | /* fill in kstatfs */ | |
70 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
71 | ||
72 | /* | |
73 | * express utilization in terms of large blocks to avoid | |
74 | * overflow on 32-bit machines. | |
92a49fb0 SW |
75 | * |
76 | * NOTE: for the time being, we make bsize == frsize to humor | |
77 | * not-yet-ancient versions of glibc that are broken. | |
78 | * Someday, we will probably want to report a real block | |
79 | * size... whatever that may mean for a network file system! | |
16725b9d SW |
80 | */ |
81 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
92a49fb0 | 82 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
16725b9d | 83 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); |
8f04d422 | 84 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
16725b9d SW |
85 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
86 | ||
87 | buf->f_files = le64_to_cpu(st.num_objects); | |
88 | buf->f_ffree = -1; | |
558d3499 | 89 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
90 | |
91 | /* leave fsid little-endian, regardless of host endianness */ | |
92 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
93 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
94 | buf->f_fsid.val[1] = fsid >> 32; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | ||
2d9c98ae | 100 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 101 | { |
3d14c5d2 | 102 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
103 | |
104 | if (!wait) { | |
105 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 106 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
107 | dout("sync_fs (non-blocking) done\n"); |
108 | return 0; | |
109 | } | |
110 | ||
111 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
112 | ceph_osdc_sync(&fsc->client->osdc); |
113 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 114 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
115 | return 0; |
116 | } | |
117 | ||
16725b9d SW |
118 | /* |
119 | * mount options | |
120 | */ | |
121 | enum { | |
16725b9d SW |
122 | Opt_wsize, |
123 | Opt_rsize, | |
83817e35 | 124 | Opt_rasize, |
16725b9d SW |
125 | Opt_caps_wanted_delay_min, |
126 | Opt_caps_wanted_delay_max, | |
6e19a16e | 127 | Opt_cap_release_safety, |
16725b9d | 128 | Opt_readdir_max_entries, |
23804d91 | 129 | Opt_readdir_max_bytes, |
2baba250 | 130 | Opt_congestion_kb, |
e53c2fe0 | 131 | Opt_last_int, |
16725b9d SW |
132 | /* int args above */ |
133 | Opt_snapdirname, | |
e53c2fe0 | 134 | Opt_last_string, |
16725b9d | 135 | /* string args above */ |
16725b9d SW |
136 | Opt_dirstat, |
137 | Opt_nodirstat, | |
138 | Opt_rbytes, | |
139 | Opt_norbytes, | |
cffaba15 | 140 | Opt_asyncreaddir, |
16725b9d | 141 | Opt_noasyncreaddir, |
a40dc6cc SW |
142 | Opt_dcache, |
143 | Opt_nodcache, | |
ad1fee96 | 144 | Opt_ino32, |
cffaba15 | 145 | Opt_noino32, |
99ccbd22 | 146 | Opt_fscache, |
45195e42 SW |
147 | Opt_nofscache, |
148 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
149 | Opt_acl, | |
150 | #endif | |
151 | Opt_noacl | |
16725b9d SW |
152 | }; |
153 | ||
3d14c5d2 | 154 | static match_table_t fsopt_tokens = { |
16725b9d SW |
155 | {Opt_wsize, "wsize=%d"}, |
156 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 157 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
158 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
159 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 160 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 161 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 162 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 163 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
164 | /* int args above */ |
165 | {Opt_snapdirname, "snapdirname=%s"}, | |
16725b9d | 166 | /* string args above */ |
16725b9d SW |
167 | {Opt_dirstat, "dirstat"}, |
168 | {Opt_nodirstat, "nodirstat"}, | |
169 | {Opt_rbytes, "rbytes"}, | |
170 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 171 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 172 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
173 | {Opt_dcache, "dcache"}, |
174 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 175 | {Opt_ino32, "ino32"}, |
cffaba15 | 176 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
177 | {Opt_fscache, "fsc"}, |
178 | {Opt_nofscache, "nofsc"}, | |
45195e42 SW |
179 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
180 | {Opt_acl, "acl"}, | |
181 | #endif | |
182 | {Opt_noacl, "noacl"}, | |
16725b9d SW |
183 | {-1, NULL} |
184 | }; | |
185 | ||
3d14c5d2 | 186 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 187 | { |
3d14c5d2 YS |
188 | struct ceph_mount_options *fsopt = private; |
189 | substring_t argstr[MAX_OPT_ARGS]; | |
190 | int token, intval, ret; | |
191 | ||
192 | token = match_token((char *)c, fsopt_tokens, argstr); | |
193 | if (token < 0) | |
194 | return -EINVAL; | |
195 | ||
196 | if (token < Opt_last_int) { | |
197 | ret = match_int(&argstr[0], &intval); | |
198 | if (ret < 0) { | |
199 | pr_err("bad mount option arg (not int) " | |
200 | "at '%s'\n", c); | |
201 | return ret; | |
c309f0ab | 202 | } |
3d14c5d2 YS |
203 | dout("got int token %d val %d\n", token, intval); |
204 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
205 | dout("got string token %d val %s\n", token, | |
206 | argstr[0].from); | |
207 | } else { | |
208 | dout("got token %d\n", token); | |
c309f0ab SW |
209 | } |
210 | ||
3d14c5d2 YS |
211 | switch (token) { |
212 | case Opt_snapdirname: | |
213 | kfree(fsopt->snapdir_name); | |
214 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
215 | argstr[0].to-argstr[0].from, | |
216 | GFP_KERNEL); | |
217 | if (!fsopt->snapdir_name) | |
218 | return -ENOMEM; | |
219 | break; | |
220 | ||
221 | /* misc */ | |
222 | case Opt_wsize: | |
223 | fsopt->wsize = intval; | |
224 | break; | |
225 | case Opt_rsize: | |
226 | fsopt->rsize = intval; | |
227 | break; | |
83817e35 SW |
228 | case Opt_rasize: |
229 | fsopt->rasize = intval; | |
230 | break; | |
3d14c5d2 YS |
231 | case Opt_caps_wanted_delay_min: |
232 | fsopt->caps_wanted_delay_min = intval; | |
233 | break; | |
234 | case Opt_caps_wanted_delay_max: | |
235 | fsopt->caps_wanted_delay_max = intval; | |
236 | break; | |
237 | case Opt_readdir_max_entries: | |
238 | fsopt->max_readdir = intval; | |
239 | break; | |
240 | case Opt_readdir_max_bytes: | |
241 | fsopt->max_readdir_bytes = intval; | |
242 | break; | |
243 | case Opt_congestion_kb: | |
244 | fsopt->congestion_kb = intval; | |
245 | break; | |
246 | case Opt_dirstat: | |
247 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
248 | break; | |
249 | case Opt_nodirstat: | |
250 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
251 | break; | |
252 | case Opt_rbytes: | |
253 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
254 | break; | |
255 | case Opt_norbytes: | |
256 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
257 | break; | |
cffaba15 AE |
258 | case Opt_asyncreaddir: |
259 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
260 | break; | |
3d14c5d2 YS |
261 | case Opt_noasyncreaddir: |
262 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
263 | break; | |
a40dc6cc SW |
264 | case Opt_dcache: |
265 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
266 | break; | |
267 | case Opt_nodcache: | |
268 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
269 | break; | |
ad1fee96 YS |
270 | case Opt_ino32: |
271 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
272 | break; | |
cffaba15 AE |
273 | case Opt_noino32: |
274 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
275 | break; | |
99ccbd22 MT |
276 | case Opt_fscache: |
277 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
278 | break; | |
279 | case Opt_nofscache: | |
280 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
281 | break; | |
45195e42 SW |
282 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
283 | case Opt_acl: | |
284 | fsopt->sb_flags |= MS_POSIXACL; | |
285 | break; | |
286 | #endif | |
287 | case Opt_noacl: | |
288 | fsopt->sb_flags &= ~MS_POSIXACL; | |
289 | break; | |
3d14c5d2 YS |
290 | default: |
291 | BUG_ON(token); | |
292 | } | |
293 | return 0; | |
c309f0ab | 294 | } |
16725b9d | 295 | |
3d14c5d2 | 296 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 297 | { |
3d14c5d2 YS |
298 | dout("destroy_mount_options %p\n", args); |
299 | kfree(args->snapdir_name); | |
300 | kfree(args); | |
301 | } | |
16725b9d | 302 | |
3d14c5d2 YS |
303 | static int strcmp_null(const char *s1, const char *s2) |
304 | { | |
305 | if (!s1 && !s2) | |
306 | return 0; | |
307 | if (s1 && !s2) | |
308 | return -1; | |
309 | if (!s1 && s2) | |
310 | return 1; | |
311 | return strcmp(s1, s2); | |
312 | } | |
16725b9d | 313 | |
3d14c5d2 YS |
314 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
315 | struct ceph_options *new_opt, | |
316 | struct ceph_fs_client *fsc) | |
317 | { | |
318 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
319 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
320 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
321 | int ret; | |
16725b9d | 322 | |
3d14c5d2 YS |
323 | ret = memcmp(fsopt1, fsopt2, ofs); |
324 | if (ret) | |
325 | return ret; | |
326 | ||
327 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
328 | if (ret) | |
329 | return ret; | |
330 | ||
331 | return ceph_compare_options(new_opt, fsc->client); | |
332 | } | |
333 | ||
334 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
335 | struct ceph_options **popt, | |
336 | int flags, char *options, | |
337 | const char *dev_name, | |
338 | const char **path) | |
339 | { | |
340 | struct ceph_mount_options *fsopt; | |
341 | const char *dev_name_end; | |
c98f533c AE |
342 | int err; |
343 | ||
344 | if (!dev_name || !*dev_name) | |
345 | return -EINVAL; | |
3d14c5d2 YS |
346 | |
347 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
348 | if (!fsopt) | |
349 | return -ENOMEM; | |
350 | ||
351 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
352 | ||
80db8bea NW |
353 | fsopt->sb_flags = flags; |
354 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 355 | |
80db8bea NW |
356 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
357 | fsopt->rasize = CEPH_RASIZE_DEFAULT; | |
358 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
50aac4fe SW |
359 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
360 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
361 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
362 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
363 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
364 | fsopt->congestion_kb = default_congestion_kb(); | |
365 | ||
c98f533c AE |
366 | /* |
367 | * Distinguish the server list from the path in "dev_name". | |
368 | * Internally we do not include the leading '/' in the path. | |
369 | * | |
370 | * "dev_name" will look like: | |
371 | * <server_spec>[,<server_spec>...]:[<path>] | |
372 | * where | |
373 | * <server_spec> is <ip>[:<port>] | |
374 | * <path> is optional, but if present must begin with '/' | |
375 | */ | |
376 | dev_name_end = strchr(dev_name, '/'); | |
377 | if (dev_name_end) { | |
378 | /* skip over leading '/' for path */ | |
379 | *path = dev_name_end + 1; | |
380 | } else { | |
381 | /* path is empty */ | |
382 | dev_name_end = dev_name + strlen(dev_name); | |
383 | *path = dev_name_end; | |
384 | } | |
80db8bea | 385 | err = -EINVAL; |
c98f533c | 386 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 387 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 388 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
389 | dev_name); |
390 | goto out; | |
391 | } | |
3d14c5d2 | 392 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
16725b9d SW |
393 | dout("server path '%s'\n", *path); |
394 | ||
ee57741c | 395 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 396 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
397 | if (IS_ERR(*popt)) { |
398 | err = PTR_ERR(*popt); | |
3d14c5d2 | 399 | goto out; |
ee57741c | 400 | } |
3d14c5d2 YS |
401 | |
402 | /* success */ | |
403 | *pfsopt = fsopt; | |
404 | return 0; | |
16725b9d | 405 | |
7b813c46 | 406 | out: |
3d14c5d2 YS |
407 | destroy_mount_options(fsopt); |
408 | return err; | |
16725b9d SW |
409 | } |
410 | ||
3d14c5d2 YS |
411 | /** |
412 | * ceph_show_options - Show mount options in /proc/mounts | |
413 | * @m: seq_file to write to | |
34c80b1d | 414 | * @root: root of that (sub)tree |
3d14c5d2 | 415 | */ |
34c80b1d | 416 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 417 | { |
34c80b1d | 418 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 YS |
419 | struct ceph_mount_options *fsopt = fsc->mount_options; |
420 | struct ceph_options *opt = fsc->client->options; | |
421 | ||
422 | if (opt->flags & CEPH_OPT_FSID) | |
423 | seq_printf(m, ",fsid=%pU", &opt->fsid); | |
424 | if (opt->flags & CEPH_OPT_NOSHARE) | |
425 | seq_puts(m, ",noshare"); | |
426 | if (opt->flags & CEPH_OPT_NOCRC) | |
427 | seq_puts(m, ",nocrc"); | |
428 | ||
429 | if (opt->name) | |
430 | seq_printf(m, ",name=%s", opt->name); | |
8323c3aa | 431 | if (opt->key) |
3d14c5d2 YS |
432 | seq_puts(m, ",secret=<hidden>"); |
433 | ||
434 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
435 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); | |
436 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
437 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); | |
3d14c5d2 YS |
438 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) |
439 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
440 | opt->osd_keepalive_timeout); | |
441 | ||
442 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
443 | seq_puts(m, ",dirstat"); | |
444 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) | |
445 | seq_puts(m, ",norbytes"); | |
446 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) | |
447 | seq_puts(m, ",noasyncreaddir"); | |
a40dc6cc SW |
448 | if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE) |
449 | seq_puts(m, ",dcache"); | |
450 | else | |
451 | seq_puts(m, ",nodcache"); | |
99ccbd22 MT |
452 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) |
453 | seq_puts(m, ",fsc"); | |
454 | else | |
455 | seq_puts(m, ",nofsc"); | |
3d14c5d2 | 456 | |
45195e42 SW |
457 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
458 | if (fsopt->sb_flags & MS_POSIXACL) | |
459 | seq_puts(m, ",acl"); | |
460 | else | |
461 | seq_puts(m, ",noacl"); | |
462 | #endif | |
463 | ||
3d14c5d2 YS |
464 | if (fsopt->wsize) |
465 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 466 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 | 467 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 468 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 469 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
470 | if (fsopt->congestion_kb != default_congestion_kb()) |
471 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
472 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
473 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
474 | fsopt->caps_wanted_delay_min); | |
475 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
476 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
477 | fsopt->caps_wanted_delay_max); | |
478 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
479 | seq_printf(m, ",cap_release_safety=%d", | |
480 | fsopt->cap_release_safety); | |
481 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
482 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
483 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
484 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
485 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
486 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); | |
487 | return 0; | |
16725b9d SW |
488 | } |
489 | ||
490 | /* | |
3d14c5d2 YS |
491 | * handle any mon messages the standard library doesn't understand. |
492 | * return error if we don't either. | |
16725b9d | 493 | */ |
3d14c5d2 | 494 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 495 | { |
3d14c5d2 YS |
496 | struct ceph_fs_client *fsc = client->private; |
497 | int type = le16_to_cpu(msg->hdr.type); | |
498 | ||
499 | switch (type) { | |
500 | case CEPH_MSG_MDS_MAP: | |
501 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
502 | return 0; | |
503 | ||
504 | default: | |
505 | return -1; | |
506 | } | |
507 | } | |
508 | ||
509 | /* | |
510 | * create a new fs client | |
511 | */ | |
0c6d4b4e | 512 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
513 | struct ceph_options *opt) |
514 | { | |
515 | struct ceph_fs_client *fsc; | |
12b4629a | 516 | const u64 supported_features = |
6ab00d46 | 517 | CEPH_FEATURE_FLOCK | |
65a22662 YZ |
518 | CEPH_FEATURE_DIRLAYOUTHASH | |
519 | CEPH_FEATURE_MDS_INLINE_DATA; | |
12b4629a | 520 | const u64 required_features = 0; |
3bf53337 AE |
521 | int page_count; |
522 | size_t size; | |
16725b9d SW |
523 | int err = -ENOMEM; |
524 | ||
3d14c5d2 YS |
525 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
526 | if (!fsc) | |
16725b9d SW |
527 | return ERR_PTR(-ENOMEM); |
528 | ||
6ab00d46 SW |
529 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
530 | required_features); | |
3d14c5d2 YS |
531 | if (IS_ERR(fsc->client)) { |
532 | err = PTR_ERR(fsc->client); | |
533 | goto fail; | |
534 | } | |
535 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
3d14c5d2 | 536 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 537 | |
3d14c5d2 | 538 | fsc->mount_options = fsopt; |
16725b9d | 539 | |
3d14c5d2 YS |
540 | fsc->sb = NULL; |
541 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 542 | |
3d14c5d2 | 543 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 544 | |
3d14c5d2 | 545 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 546 | if (err < 0) |
3d14c5d2 | 547 | goto fail_client; |
859e7b14 | 548 | |
16725b9d | 549 | err = -ENOMEM; |
01e6acc4 TH |
550 | /* |
551 | * The number of concurrent works can be high but they don't need | |
552 | * to be processed in parallel, limit concurrency. | |
553 | */ | |
554 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 555 | if (fsc->wb_wq == NULL) |
859e7b14 | 556 | goto fail_bdi; |
01e6acc4 | 557 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 558 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 559 | goto fail_wb_wq; |
01e6acc4 | 560 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 561 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
562 | goto fail_pg_inv_wq; |
563 | ||
b9bfb93c SW |
564 | /* set up mempools */ |
565 | err = -ENOMEM; | |
3bf53337 AE |
566 | page_count = fsc->mount_options->wsize >> PAGE_CACHE_SHIFT; |
567 | size = sizeof (struct page *) * (page_count ? page_count : 1); | |
568 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 569 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
570 | goto fail_trunc_wq; |
571 | ||
99ccbd22 MT |
572 | /* setup fscache */ |
573 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && | |
574 | (ceph_fscache_register_fs(fsc) != 0)) | |
575 | goto fail_fscache; | |
576 | ||
85ccce43 | 577 | /* caps */ |
3d14c5d2 YS |
578 | fsc->min_caps = fsopt->max_readdir; |
579 | ||
580 | return fsc; | |
b9bfb93c | 581 | |
99ccbd22 MT |
582 | fail_fscache: |
583 | ceph_fscache_unregister_fs(fsc); | |
16725b9d | 584 | fail_trunc_wq: |
3d14c5d2 | 585 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 586 | fail_pg_inv_wq: |
3d14c5d2 | 587 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 588 | fail_wb_wq: |
3d14c5d2 | 589 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 590 | fail_bdi: |
3d14c5d2 YS |
591 | bdi_destroy(&fsc->backing_dev_info); |
592 | fail_client: | |
593 | ceph_destroy_client(fsc->client); | |
16725b9d | 594 | fail: |
3d14c5d2 | 595 | kfree(fsc); |
16725b9d SW |
596 | return ERR_PTR(err); |
597 | } | |
598 | ||
0c6d4b4e | 599 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 600 | { |
3d14c5d2 | 601 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 602 | |
99ccbd22 MT |
603 | ceph_fscache_unregister_fs(fsc); |
604 | ||
3d14c5d2 YS |
605 | destroy_workqueue(fsc->wb_wq); |
606 | destroy_workqueue(fsc->pg_inv_wq); | |
607 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 608 | |
3d14c5d2 | 609 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 610 | |
3d14c5d2 | 611 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 612 | |
3d14c5d2 | 613 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 614 | |
3d14c5d2 | 615 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 616 | |
3d14c5d2 | 617 | ceph_destroy_client(fsc->client); |
16725b9d | 618 | |
3d14c5d2 YS |
619 | kfree(fsc); |
620 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
621 | } |
622 | ||
0743304d | 623 | /* |
3d14c5d2 | 624 | * caches |
0743304d | 625 | */ |
3d14c5d2 YS |
626 | struct kmem_cache *ceph_inode_cachep; |
627 | struct kmem_cache *ceph_cap_cachep; | |
628 | struct kmem_cache *ceph_dentry_cachep; | |
629 | struct kmem_cache *ceph_file_cachep; | |
630 | ||
631 | static void ceph_inode_init_once(void *foo) | |
0743304d | 632 | { |
3d14c5d2 YS |
633 | struct ceph_inode_info *ci = foo; |
634 | inode_init_once(&ci->vfs_inode); | |
635 | } | |
636 | ||
637 | static int __init init_caches(void) | |
638 | { | |
99ccbd22 MT |
639 | int error = -ENOMEM; |
640 | ||
3d14c5d2 YS |
641 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
642 | sizeof(struct ceph_inode_info), | |
643 | __alignof__(struct ceph_inode_info), | |
644 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
645 | ceph_inode_init_once); | |
646 | if (ceph_inode_cachep == NULL) | |
647 | return -ENOMEM; | |
648 | ||
649 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
650 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
651 | if (ceph_cap_cachep == NULL) | |
652 | goto bad_cap; | |
653 | ||
654 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
655 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
656 | if (ceph_dentry_cachep == NULL) | |
657 | goto bad_dentry; | |
658 | ||
659 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
660 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
661 | if (ceph_file_cachep == NULL) | |
662 | goto bad_file; | |
663 | ||
99ccbd22 MT |
664 | if ((error = ceph_fscache_register())) |
665 | goto bad_file; | |
3d14c5d2 | 666 | |
99ccbd22 | 667 | return 0; |
3d14c5d2 YS |
668 | bad_file: |
669 | kmem_cache_destroy(ceph_dentry_cachep); | |
670 | bad_dentry: | |
671 | kmem_cache_destroy(ceph_cap_cachep); | |
672 | bad_cap: | |
673 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 674 | return error; |
0743304d SW |
675 | } |
676 | ||
3d14c5d2 YS |
677 | static void destroy_caches(void) |
678 | { | |
8c0a8537 KS |
679 | /* |
680 | * Make sure all delayed rcu free inodes are flushed before we | |
681 | * destroy cache. | |
682 | */ | |
683 | rcu_barrier(); | |
99ccbd22 | 684 | |
3d14c5d2 YS |
685 | kmem_cache_destroy(ceph_inode_cachep); |
686 | kmem_cache_destroy(ceph_cap_cachep); | |
687 | kmem_cache_destroy(ceph_dentry_cachep); | |
688 | kmem_cache_destroy(ceph_file_cachep); | |
99ccbd22 MT |
689 | |
690 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
691 | } |
692 | ||
693 | ||
16725b9d | 694 | /* |
3d14c5d2 YS |
695 | * ceph_umount_begin - initiate forced umount. Tear down down the |
696 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 697 | */ |
3d14c5d2 | 698 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 699 | { |
3d14c5d2 YS |
700 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
701 | ||
702 | dout("ceph_umount_begin - starting forced umount\n"); | |
703 | if (!fsc) | |
704 | return; | |
705 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
706 | return; | |
16725b9d SW |
707 | } |
708 | ||
3d14c5d2 YS |
709 | static const struct super_operations ceph_super_ops = { |
710 | .alloc_inode = ceph_alloc_inode, | |
711 | .destroy_inode = ceph_destroy_inode, | |
712 | .write_inode = ceph_write_inode, | |
9f12bd11 | 713 | .drop_inode = ceph_drop_inode, |
3d14c5d2 YS |
714 | .sync_fs = ceph_sync_fs, |
715 | .put_super = ceph_put_super, | |
716 | .show_options = ceph_show_options, | |
717 | .statfs = ceph_statfs, | |
718 | .umount_begin = ceph_umount_begin, | |
719 | }; | |
720 | ||
16725b9d SW |
721 | /* |
722 | * Bootstrap mount by opening the root directory. Note the mount | |
723 | * @started time from caller, and time out if this takes too long. | |
724 | */ | |
3d14c5d2 | 725 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
726 | const char *path, |
727 | unsigned long started) | |
728 | { | |
3d14c5d2 | 729 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
730 | struct ceph_mds_request *req = NULL; |
731 | int err; | |
732 | struct dentry *root; | |
733 | ||
734 | /* open dir */ | |
735 | dout("open_root_inode opening '%s'\n", path); | |
736 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
737 | if (IS_ERR(req)) | |
7e34bc52 | 738 | return ERR_CAST(req); |
16725b9d SW |
739 | req->r_path1 = kstrdup(path, GFP_NOFS); |
740 | req->r_ino1.ino = CEPH_INO_ROOT; | |
741 | req->r_ino1.snap = CEPH_NOSNAP; | |
742 | req->r_started = started; | |
3d14c5d2 | 743 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
744 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
745 | req->r_num_caps = 2; | |
746 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
747 | if (err == 0) { | |
3c5184ef AV |
748 | struct inode *inode = req->r_target_inode; |
749 | req->r_target_inode = NULL; | |
16725b9d | 750 | dout("open_root_inode success\n"); |
3c5184ef | 751 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 752 | fsc->sb->s_root == NULL) { |
48fde701 | 753 | root = d_make_root(inode); |
3c5184ef | 754 | if (!root) { |
3c5184ef AV |
755 | root = ERR_PTR(-ENOMEM); |
756 | goto out; | |
757 | } | |
774ac21d | 758 | } else { |
1a0a397e | 759 | root = d_obtain_root(inode); |
774ac21d | 760 | } |
d46cfba5 | 761 | ceph_init_dentry(root); |
16725b9d SW |
762 | dout("open_root_inode success, root dentry is %p\n", root); |
763 | } else { | |
764 | root = ERR_PTR(err); | |
765 | } | |
3c5184ef | 766 | out: |
16725b9d SW |
767 | ceph_mdsc_put_request(req); |
768 | return root; | |
769 | } | |
770 | ||
3d14c5d2 YS |
771 | |
772 | ||
773 | ||
16725b9d SW |
774 | /* |
775 | * mount: join the ceph cluster, and open root directory. | |
776 | */ | |
a7f9fb20 | 777 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
778 | const char *path) |
779 | { | |
16725b9d | 780 | int err; |
16725b9d SW |
781 | unsigned long started = jiffies; /* note the start time */ |
782 | struct dentry *root; | |
3d14c5d2 | 783 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
784 | |
785 | dout("mount start\n"); | |
3d14c5d2 | 786 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 787 | |
3d14c5d2 | 788 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
789 | if (err < 0) |
790 | goto out; | |
791 | ||
16725b9d | 792 | dout("mount opening root\n"); |
3d14c5d2 | 793 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
794 | if (IS_ERR(root)) { |
795 | err = PTR_ERR(root); | |
796 | goto out; | |
797 | } | |
3d14c5d2 | 798 | if (fsc->sb->s_root) { |
16725b9d | 799 | dput(root); |
3d14c5d2 YS |
800 | } else { |
801 | fsc->sb->s_root = root; | |
802 | first = 1; | |
803 | ||
804 | err = ceph_fs_debugfs_init(fsc); | |
805 | if (err < 0) | |
806 | goto fail; | |
807 | } | |
16725b9d SW |
808 | |
809 | if (path[0] == 0) { | |
810 | dget(root); | |
811 | } else { | |
812 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 813 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
814 | if (IS_ERR(root)) { |
815 | err = PTR_ERR(root); | |
3d14c5d2 | 816 | goto fail; |
16725b9d SW |
817 | } |
818 | } | |
819 | ||
3d14c5d2 | 820 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 821 | dout("mount success\n"); |
a7f9fb20 AV |
822 | mutex_unlock(&fsc->client->mount_mutex); |
823 | return root; | |
16725b9d SW |
824 | |
825 | out: | |
3d14c5d2 | 826 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 827 | return ERR_PTR(err); |
3d14c5d2 YS |
828 | |
829 | fail: | |
830 | if (first) { | |
831 | dput(fsc->sb->s_root); | |
832 | fsc->sb->s_root = NULL; | |
833 | } | |
834 | goto out; | |
16725b9d SW |
835 | } |
836 | ||
837 | static int ceph_set_super(struct super_block *s, void *data) | |
838 | { | |
3d14c5d2 | 839 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
840 | int ret; |
841 | ||
842 | dout("set_super %p data %p\n", s, data); | |
843 | ||
3d14c5d2 | 844 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
845 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
846 | ||
7221fe4c | 847 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
848 | s->s_fs_info = fsc; |
849 | fsc->sb = s; | |
16725b9d SW |
850 | |
851 | s->s_op = &ceph_super_ops; | |
852 | s->s_export_op = &ceph_export_ops; | |
853 | ||
854 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
855 | ||
856 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
857 | if (ret != 0) | |
858 | goto fail; | |
859 | ||
860 | return ret; | |
861 | ||
862 | fail: | |
863 | s->s_fs_info = NULL; | |
3d14c5d2 | 864 | fsc->sb = NULL; |
16725b9d SW |
865 | return ret; |
866 | } | |
867 | ||
868 | /* | |
869 | * share superblock if same fs AND options | |
870 | */ | |
871 | static int ceph_compare_super(struct super_block *sb, void *data) | |
872 | { | |
3d14c5d2 YS |
873 | struct ceph_fs_client *new = data; |
874 | struct ceph_mount_options *fsopt = new->mount_options; | |
875 | struct ceph_options *opt = new->client->options; | |
876 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
877 | |
878 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
879 | |
880 | if (compare_mount_options(fsopt, opt, other)) { | |
881 | dout("monitor(s)/mount options don't match\n"); | |
882 | return 0; | |
16725b9d | 883 | } |
3d14c5d2 YS |
884 | if ((opt->flags & CEPH_OPT_FSID) && |
885 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
886 | dout("fsid doesn't match\n"); | |
887 | return 0; | |
888 | } | |
889 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
890 | dout("flags differ\n"); |
891 | return 0; | |
892 | } | |
893 | return 1; | |
894 | } | |
895 | ||
896 | /* | |
897 | * construct our own bdi so we can control readahead, etc. | |
898 | */ | |
00d5643e | 899 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 900 | |
3d14c5d2 YS |
901 | static int ceph_register_bdi(struct super_block *sb, |
902 | struct ceph_fs_client *fsc) | |
16725b9d SW |
903 | { |
904 | int err; | |
905 | ||
83817e35 SW |
906 | /* set ra_pages based on rasize mount option? */ |
907 | if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE) | |
3d14c5d2 | 908 | fsc->backing_dev_info.ra_pages = |
83817e35 | 909 | (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1) |
16725b9d | 910 | >> PAGE_SHIFT; |
e9852227 YS |
911 | else |
912 | fsc->backing_dev_info.ra_pages = | |
913 | default_backing_dev_info.ra_pages; | |
914 | ||
d2cc4dde | 915 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
31e0cf8f | 916 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 917 | if (!err) |
3d14c5d2 | 918 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
919 | return err; |
920 | } | |
921 | ||
a7f9fb20 AV |
922 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
923 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
924 | { |
925 | struct super_block *sb; | |
3d14c5d2 | 926 | struct ceph_fs_client *fsc; |
a7f9fb20 | 927 | struct dentry *res; |
16725b9d SW |
928 | int err; |
929 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 930 | const char *path = NULL; |
3d14c5d2 YS |
931 | struct ceph_mount_options *fsopt = NULL; |
932 | struct ceph_options *opt = NULL; | |
16725b9d | 933 | |
a7f9fb20 | 934 | dout("ceph_mount\n"); |
45195e42 SW |
935 | |
936 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
937 | flags |= MS_POSIXACL; | |
938 | #endif | |
3d14c5d2 | 939 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
940 | if (err < 0) { |
941 | res = ERR_PTR(err); | |
6b805185 | 942 | goto out_final; |
a7f9fb20 | 943 | } |
16725b9d SW |
944 | |
945 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
946 | fsc = create_fs_client(fsopt, opt); |
947 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 948 | res = ERR_CAST(fsc); |
259a187a NW |
949 | destroy_mount_options(fsopt); |
950 | ceph_destroy_options(opt); | |
6b805185 SW |
951 | goto out_final; |
952 | } | |
16725b9d | 953 | |
3d14c5d2 | 954 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
955 | if (err < 0) { |
956 | res = ERR_PTR(err); | |
3d14c5d2 | 957 | goto out; |
a7f9fb20 | 958 | } |
3d14c5d2 YS |
959 | |
960 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 961 | compare_super = NULL; |
9249e17f | 962 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 963 | if (IS_ERR(sb)) { |
a7f9fb20 | 964 | res = ERR_CAST(sb); |
16725b9d SW |
965 | goto out; |
966 | } | |
967 | ||
3d14c5d2 YS |
968 | if (ceph_sb_to_client(sb) != fsc) { |
969 | ceph_mdsc_destroy(fsc); | |
970 | destroy_fs_client(fsc); | |
971 | fsc = ceph_sb_to_client(sb); | |
972 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 973 | } else { |
3d14c5d2 YS |
974 | dout("get_sb using new client %p\n", fsc); |
975 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
976 | if (err < 0) { |
977 | res = ERR_PTR(err); | |
16725b9d | 978 | goto out_splat; |
a7f9fb20 | 979 | } |
16725b9d SW |
980 | } |
981 | ||
a7f9fb20 AV |
982 | res = ceph_real_mount(fsc, path); |
983 | if (IS_ERR(res)) | |
16725b9d | 984 | goto out_splat; |
a7f9fb20 AV |
985 | dout("root %p inode %p ino %llx.%llx\n", res, |
986 | res->d_inode, ceph_vinop(res->d_inode)); | |
987 | return res; | |
16725b9d SW |
988 | |
989 | out_splat: | |
3d14c5d2 | 990 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 991 | deactivate_locked_super(sb); |
16725b9d SW |
992 | goto out_final; |
993 | ||
994 | out: | |
3d14c5d2 YS |
995 | ceph_mdsc_destroy(fsc); |
996 | destroy_fs_client(fsc); | |
16725b9d | 997 | out_final: |
a7f9fb20 AV |
998 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
999 | return res; | |
16725b9d SW |
1000 | } |
1001 | ||
1002 | static void ceph_kill_sb(struct super_block *s) | |
1003 | { | |
3d14c5d2 | 1004 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 1005 | dout("kill_sb %p\n", s); |
3d14c5d2 | 1006 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 1007 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
1008 | ceph_mdsc_destroy(fsc); |
1009 | destroy_fs_client(fsc); | |
16725b9d SW |
1010 | } |
1011 | ||
1012 | static struct file_system_type ceph_fs_type = { | |
1013 | .owner = THIS_MODULE, | |
1014 | .name = "ceph", | |
a7f9fb20 | 1015 | .mount = ceph_mount, |
16725b9d SW |
1016 | .kill_sb = ceph_kill_sb, |
1017 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1018 | }; | |
7f78e035 | 1019 | MODULE_ALIAS_FS("ceph"); |
16725b9d | 1020 | |
16725b9d SW |
1021 | static int __init init_ceph(void) |
1022 | { | |
3d14c5d2 | 1023 | int ret = init_caches(); |
16725b9d | 1024 | if (ret) |
3d14c5d2 | 1025 | goto out; |
16725b9d | 1026 | |
eb13e832 | 1027 | ceph_flock_init(); |
3ce6cd12 | 1028 | ceph_xattr_init(); |
97c85a82 YZ |
1029 | ret = ceph_snap_init(); |
1030 | if (ret) | |
1031 | goto out_xattr; | |
16725b9d SW |
1032 | ret = register_filesystem(&ceph_fs_type); |
1033 | if (ret) | |
97c85a82 | 1034 | goto out_snap; |
16725b9d | 1035 | |
3d14c5d2 YS |
1036 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1037 | ||
16725b9d SW |
1038 | return 0; |
1039 | ||
97c85a82 YZ |
1040 | out_snap: |
1041 | ceph_snap_exit(); | |
1042 | out_xattr: | |
3ce6cd12 | 1043 | ceph_xattr_exit(); |
16725b9d | 1044 | destroy_caches(); |
16725b9d SW |
1045 | out: |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | static void __exit exit_ceph(void) | |
1050 | { | |
1051 | dout("exit_ceph\n"); | |
1052 | unregister_filesystem(&ceph_fs_type); | |
97c85a82 | 1053 | ceph_snap_exit(); |
3ce6cd12 | 1054 | ceph_xattr_exit(); |
16725b9d | 1055 | destroy_caches(); |
16725b9d SW |
1056 | } |
1057 | ||
1058 | module_init(init_ceph); | |
1059 | module_exit(exit_ceph); | |
1060 | ||
1061 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1062 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1063 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1064 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1065 | MODULE_LICENSE("GPL"); |