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 SW |
517 | CEPH_FEATURE_FLOCK | |
518 | CEPH_FEATURE_DIRLAYOUTHASH; | |
12b4629a | 519 | const u64 required_features = 0; |
3bf53337 AE |
520 | int page_count; |
521 | size_t size; | |
16725b9d SW |
522 | int err = -ENOMEM; |
523 | ||
3d14c5d2 YS |
524 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
525 | if (!fsc) | |
16725b9d SW |
526 | return ERR_PTR(-ENOMEM); |
527 | ||
6ab00d46 SW |
528 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
529 | required_features); | |
3d14c5d2 YS |
530 | if (IS_ERR(fsc->client)) { |
531 | err = PTR_ERR(fsc->client); | |
532 | goto fail; | |
533 | } | |
534 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
3d14c5d2 | 535 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 536 | |
3d14c5d2 | 537 | fsc->mount_options = fsopt; |
16725b9d | 538 | |
3d14c5d2 YS |
539 | fsc->sb = NULL; |
540 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 541 | |
3d14c5d2 | 542 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 543 | |
3d14c5d2 | 544 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 545 | if (err < 0) |
3d14c5d2 | 546 | goto fail_client; |
859e7b14 | 547 | |
16725b9d | 548 | err = -ENOMEM; |
01e6acc4 TH |
549 | /* |
550 | * The number of concurrent works can be high but they don't need | |
551 | * to be processed in parallel, limit concurrency. | |
552 | */ | |
553 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 554 | if (fsc->wb_wq == NULL) |
859e7b14 | 555 | goto fail_bdi; |
01e6acc4 | 556 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 557 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 558 | goto fail_wb_wq; |
01e6acc4 | 559 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 560 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
561 | goto fail_pg_inv_wq; |
562 | ||
b9bfb93c SW |
563 | /* set up mempools */ |
564 | err = -ENOMEM; | |
3bf53337 AE |
565 | page_count = fsc->mount_options->wsize >> PAGE_CACHE_SHIFT; |
566 | size = sizeof (struct page *) * (page_count ? page_count : 1); | |
567 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 568 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
569 | goto fail_trunc_wq; |
570 | ||
99ccbd22 MT |
571 | /* setup fscache */ |
572 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && | |
573 | (ceph_fscache_register_fs(fsc) != 0)) | |
574 | goto fail_fscache; | |
575 | ||
85ccce43 | 576 | /* caps */ |
3d14c5d2 YS |
577 | fsc->min_caps = fsopt->max_readdir; |
578 | ||
579 | return fsc; | |
b9bfb93c | 580 | |
99ccbd22 MT |
581 | fail_fscache: |
582 | ceph_fscache_unregister_fs(fsc); | |
16725b9d | 583 | fail_trunc_wq: |
3d14c5d2 | 584 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 585 | fail_pg_inv_wq: |
3d14c5d2 | 586 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 587 | fail_wb_wq: |
3d14c5d2 | 588 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 589 | fail_bdi: |
3d14c5d2 YS |
590 | bdi_destroy(&fsc->backing_dev_info); |
591 | fail_client: | |
592 | ceph_destroy_client(fsc->client); | |
16725b9d | 593 | fail: |
3d14c5d2 | 594 | kfree(fsc); |
16725b9d SW |
595 | return ERR_PTR(err); |
596 | } | |
597 | ||
0c6d4b4e | 598 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 599 | { |
3d14c5d2 | 600 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 601 | |
99ccbd22 MT |
602 | ceph_fscache_unregister_fs(fsc); |
603 | ||
3d14c5d2 YS |
604 | destroy_workqueue(fsc->wb_wq); |
605 | destroy_workqueue(fsc->pg_inv_wq); | |
606 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 607 | |
3d14c5d2 | 608 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 609 | |
3d14c5d2 | 610 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 611 | |
3d14c5d2 | 612 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 613 | |
3d14c5d2 | 614 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 615 | |
3d14c5d2 | 616 | ceph_destroy_client(fsc->client); |
16725b9d | 617 | |
3d14c5d2 YS |
618 | kfree(fsc); |
619 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
620 | } |
621 | ||
0743304d | 622 | /* |
3d14c5d2 | 623 | * caches |
0743304d | 624 | */ |
3d14c5d2 YS |
625 | struct kmem_cache *ceph_inode_cachep; |
626 | struct kmem_cache *ceph_cap_cachep; | |
627 | struct kmem_cache *ceph_dentry_cachep; | |
628 | struct kmem_cache *ceph_file_cachep; | |
629 | ||
630 | static void ceph_inode_init_once(void *foo) | |
0743304d | 631 | { |
3d14c5d2 YS |
632 | struct ceph_inode_info *ci = foo; |
633 | inode_init_once(&ci->vfs_inode); | |
634 | } | |
635 | ||
636 | static int __init init_caches(void) | |
637 | { | |
99ccbd22 MT |
638 | int error = -ENOMEM; |
639 | ||
3d14c5d2 YS |
640 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
641 | sizeof(struct ceph_inode_info), | |
642 | __alignof__(struct ceph_inode_info), | |
643 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
644 | ceph_inode_init_once); | |
645 | if (ceph_inode_cachep == NULL) | |
646 | return -ENOMEM; | |
647 | ||
648 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
649 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
650 | if (ceph_cap_cachep == NULL) | |
651 | goto bad_cap; | |
652 | ||
653 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
654 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
655 | if (ceph_dentry_cachep == NULL) | |
656 | goto bad_dentry; | |
657 | ||
658 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
659 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
660 | if (ceph_file_cachep == NULL) | |
661 | goto bad_file; | |
662 | ||
99ccbd22 MT |
663 | if ((error = ceph_fscache_register())) |
664 | goto bad_file; | |
3d14c5d2 | 665 | |
99ccbd22 | 666 | return 0; |
3d14c5d2 YS |
667 | bad_file: |
668 | kmem_cache_destroy(ceph_dentry_cachep); | |
669 | bad_dentry: | |
670 | kmem_cache_destroy(ceph_cap_cachep); | |
671 | bad_cap: | |
672 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 673 | return error; |
0743304d SW |
674 | } |
675 | ||
3d14c5d2 YS |
676 | static void destroy_caches(void) |
677 | { | |
8c0a8537 KS |
678 | /* |
679 | * Make sure all delayed rcu free inodes are flushed before we | |
680 | * destroy cache. | |
681 | */ | |
682 | rcu_barrier(); | |
99ccbd22 | 683 | |
3d14c5d2 YS |
684 | kmem_cache_destroy(ceph_inode_cachep); |
685 | kmem_cache_destroy(ceph_cap_cachep); | |
686 | kmem_cache_destroy(ceph_dentry_cachep); | |
687 | kmem_cache_destroy(ceph_file_cachep); | |
99ccbd22 MT |
688 | |
689 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
690 | } |
691 | ||
692 | ||
16725b9d | 693 | /* |
3d14c5d2 YS |
694 | * ceph_umount_begin - initiate forced umount. Tear down down the |
695 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 696 | */ |
3d14c5d2 | 697 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 698 | { |
3d14c5d2 YS |
699 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
700 | ||
701 | dout("ceph_umount_begin - starting forced umount\n"); | |
702 | if (!fsc) | |
703 | return; | |
704 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
705 | return; | |
16725b9d SW |
706 | } |
707 | ||
3d14c5d2 YS |
708 | static const struct super_operations ceph_super_ops = { |
709 | .alloc_inode = ceph_alloc_inode, | |
710 | .destroy_inode = ceph_destroy_inode, | |
711 | .write_inode = ceph_write_inode, | |
9f12bd11 | 712 | .drop_inode = ceph_drop_inode, |
3d14c5d2 YS |
713 | .sync_fs = ceph_sync_fs, |
714 | .put_super = ceph_put_super, | |
715 | .show_options = ceph_show_options, | |
716 | .statfs = ceph_statfs, | |
717 | .umount_begin = ceph_umount_begin, | |
718 | }; | |
719 | ||
16725b9d SW |
720 | /* |
721 | * Bootstrap mount by opening the root directory. Note the mount | |
722 | * @started time from caller, and time out if this takes too long. | |
723 | */ | |
3d14c5d2 | 724 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
725 | const char *path, |
726 | unsigned long started) | |
727 | { | |
3d14c5d2 | 728 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
729 | struct ceph_mds_request *req = NULL; |
730 | int err; | |
731 | struct dentry *root; | |
732 | ||
733 | /* open dir */ | |
734 | dout("open_root_inode opening '%s'\n", path); | |
735 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
736 | if (IS_ERR(req)) | |
7e34bc52 | 737 | return ERR_CAST(req); |
16725b9d SW |
738 | req->r_path1 = kstrdup(path, GFP_NOFS); |
739 | req->r_ino1.ino = CEPH_INO_ROOT; | |
740 | req->r_ino1.snap = CEPH_NOSNAP; | |
741 | req->r_started = started; | |
3d14c5d2 | 742 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
743 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
744 | req->r_num_caps = 2; | |
745 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
746 | if (err == 0) { | |
3c5184ef AV |
747 | struct inode *inode = req->r_target_inode; |
748 | req->r_target_inode = NULL; | |
16725b9d | 749 | dout("open_root_inode success\n"); |
3c5184ef | 750 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 751 | fsc->sb->s_root == NULL) { |
48fde701 | 752 | root = d_make_root(inode); |
3c5184ef | 753 | if (!root) { |
3c5184ef AV |
754 | root = ERR_PTR(-ENOMEM); |
755 | goto out; | |
756 | } | |
774ac21d | 757 | } else { |
3c5184ef | 758 | root = d_obtain_alias(inode); |
774ac21d | 759 | } |
d46cfba5 | 760 | ceph_init_dentry(root); |
16725b9d SW |
761 | dout("open_root_inode success, root dentry is %p\n", root); |
762 | } else { | |
763 | root = ERR_PTR(err); | |
764 | } | |
3c5184ef | 765 | out: |
16725b9d SW |
766 | ceph_mdsc_put_request(req); |
767 | return root; | |
768 | } | |
769 | ||
3d14c5d2 YS |
770 | |
771 | ||
772 | ||
16725b9d SW |
773 | /* |
774 | * mount: join the ceph cluster, and open root directory. | |
775 | */ | |
a7f9fb20 | 776 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
777 | const char *path) |
778 | { | |
16725b9d | 779 | int err; |
16725b9d SW |
780 | unsigned long started = jiffies; /* note the start time */ |
781 | struct dentry *root; | |
3d14c5d2 | 782 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
783 | |
784 | dout("mount start\n"); | |
3d14c5d2 | 785 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 786 | |
3d14c5d2 | 787 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
788 | if (err < 0) |
789 | goto out; | |
790 | ||
16725b9d | 791 | dout("mount opening root\n"); |
3d14c5d2 | 792 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
793 | if (IS_ERR(root)) { |
794 | err = PTR_ERR(root); | |
795 | goto out; | |
796 | } | |
3d14c5d2 | 797 | if (fsc->sb->s_root) { |
16725b9d | 798 | dput(root); |
3d14c5d2 YS |
799 | } else { |
800 | fsc->sb->s_root = root; | |
801 | first = 1; | |
802 | ||
803 | err = ceph_fs_debugfs_init(fsc); | |
804 | if (err < 0) | |
805 | goto fail; | |
806 | } | |
16725b9d SW |
807 | |
808 | if (path[0] == 0) { | |
809 | dget(root); | |
810 | } else { | |
811 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 812 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
813 | if (IS_ERR(root)) { |
814 | err = PTR_ERR(root); | |
3d14c5d2 | 815 | goto fail; |
16725b9d SW |
816 | } |
817 | } | |
818 | ||
3d14c5d2 | 819 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 820 | dout("mount success\n"); |
a7f9fb20 AV |
821 | mutex_unlock(&fsc->client->mount_mutex); |
822 | return root; | |
16725b9d SW |
823 | |
824 | out: | |
3d14c5d2 | 825 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 826 | return ERR_PTR(err); |
3d14c5d2 YS |
827 | |
828 | fail: | |
829 | if (first) { | |
830 | dput(fsc->sb->s_root); | |
831 | fsc->sb->s_root = NULL; | |
832 | } | |
833 | goto out; | |
16725b9d SW |
834 | } |
835 | ||
836 | static int ceph_set_super(struct super_block *s, void *data) | |
837 | { | |
3d14c5d2 | 838 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
839 | int ret; |
840 | ||
841 | dout("set_super %p data %p\n", s, data); | |
842 | ||
3d14c5d2 | 843 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
844 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
845 | ||
7221fe4c | 846 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
847 | s->s_fs_info = fsc; |
848 | fsc->sb = s; | |
16725b9d SW |
849 | |
850 | s->s_op = &ceph_super_ops; | |
851 | s->s_export_op = &ceph_export_ops; | |
852 | ||
853 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
854 | ||
855 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
856 | if (ret != 0) | |
857 | goto fail; | |
858 | ||
859 | return ret; | |
860 | ||
861 | fail: | |
862 | s->s_fs_info = NULL; | |
3d14c5d2 | 863 | fsc->sb = NULL; |
16725b9d SW |
864 | return ret; |
865 | } | |
866 | ||
867 | /* | |
868 | * share superblock if same fs AND options | |
869 | */ | |
870 | static int ceph_compare_super(struct super_block *sb, void *data) | |
871 | { | |
3d14c5d2 YS |
872 | struct ceph_fs_client *new = data; |
873 | struct ceph_mount_options *fsopt = new->mount_options; | |
874 | struct ceph_options *opt = new->client->options; | |
875 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
876 | |
877 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
878 | |
879 | if (compare_mount_options(fsopt, opt, other)) { | |
880 | dout("monitor(s)/mount options don't match\n"); | |
881 | return 0; | |
16725b9d | 882 | } |
3d14c5d2 YS |
883 | if ((opt->flags & CEPH_OPT_FSID) && |
884 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
885 | dout("fsid doesn't match\n"); | |
886 | return 0; | |
887 | } | |
888 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
889 | dout("flags differ\n"); |
890 | return 0; | |
891 | } | |
892 | return 1; | |
893 | } | |
894 | ||
895 | /* | |
896 | * construct our own bdi so we can control readahead, etc. | |
897 | */ | |
00d5643e | 898 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 899 | |
3d14c5d2 YS |
900 | static int ceph_register_bdi(struct super_block *sb, |
901 | struct ceph_fs_client *fsc) | |
16725b9d SW |
902 | { |
903 | int err; | |
904 | ||
83817e35 SW |
905 | /* set ra_pages based on rasize mount option? */ |
906 | if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE) | |
3d14c5d2 | 907 | fsc->backing_dev_info.ra_pages = |
83817e35 | 908 | (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1) |
16725b9d | 909 | >> PAGE_SHIFT; |
e9852227 YS |
910 | else |
911 | fsc->backing_dev_info.ra_pages = | |
912 | default_backing_dev_info.ra_pages; | |
913 | ||
d2cc4dde | 914 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
31e0cf8f | 915 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 916 | if (!err) |
3d14c5d2 | 917 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
918 | return err; |
919 | } | |
920 | ||
a7f9fb20 AV |
921 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
922 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
923 | { |
924 | struct super_block *sb; | |
3d14c5d2 | 925 | struct ceph_fs_client *fsc; |
a7f9fb20 | 926 | struct dentry *res; |
16725b9d SW |
927 | int err; |
928 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 929 | const char *path = NULL; |
3d14c5d2 YS |
930 | struct ceph_mount_options *fsopt = NULL; |
931 | struct ceph_options *opt = NULL; | |
16725b9d | 932 | |
a7f9fb20 | 933 | dout("ceph_mount\n"); |
45195e42 SW |
934 | |
935 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
936 | flags |= MS_POSIXACL; | |
937 | #endif | |
3d14c5d2 | 938 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
939 | if (err < 0) { |
940 | res = ERR_PTR(err); | |
6b805185 | 941 | goto out_final; |
a7f9fb20 | 942 | } |
16725b9d SW |
943 | |
944 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
945 | fsc = create_fs_client(fsopt, opt); |
946 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 947 | res = ERR_CAST(fsc); |
259a187a NW |
948 | destroy_mount_options(fsopt); |
949 | ceph_destroy_options(opt); | |
6b805185 SW |
950 | goto out_final; |
951 | } | |
16725b9d | 952 | |
3d14c5d2 | 953 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
954 | if (err < 0) { |
955 | res = ERR_PTR(err); | |
3d14c5d2 | 956 | goto out; |
a7f9fb20 | 957 | } |
3d14c5d2 YS |
958 | |
959 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 960 | compare_super = NULL; |
9249e17f | 961 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 962 | if (IS_ERR(sb)) { |
a7f9fb20 | 963 | res = ERR_CAST(sb); |
16725b9d SW |
964 | goto out; |
965 | } | |
966 | ||
3d14c5d2 YS |
967 | if (ceph_sb_to_client(sb) != fsc) { |
968 | ceph_mdsc_destroy(fsc); | |
969 | destroy_fs_client(fsc); | |
970 | fsc = ceph_sb_to_client(sb); | |
971 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 972 | } else { |
3d14c5d2 YS |
973 | dout("get_sb using new client %p\n", fsc); |
974 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
975 | if (err < 0) { |
976 | res = ERR_PTR(err); | |
16725b9d | 977 | goto out_splat; |
a7f9fb20 | 978 | } |
16725b9d SW |
979 | } |
980 | ||
a7f9fb20 AV |
981 | res = ceph_real_mount(fsc, path); |
982 | if (IS_ERR(res)) | |
16725b9d | 983 | goto out_splat; |
a7f9fb20 AV |
984 | dout("root %p inode %p ino %llx.%llx\n", res, |
985 | res->d_inode, ceph_vinop(res->d_inode)); | |
986 | return res; | |
16725b9d SW |
987 | |
988 | out_splat: | |
3d14c5d2 | 989 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 990 | deactivate_locked_super(sb); |
16725b9d SW |
991 | goto out_final; |
992 | ||
993 | out: | |
3d14c5d2 YS |
994 | ceph_mdsc_destroy(fsc); |
995 | destroy_fs_client(fsc); | |
16725b9d | 996 | out_final: |
a7f9fb20 AV |
997 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
998 | return res; | |
16725b9d SW |
999 | } |
1000 | ||
1001 | static void ceph_kill_sb(struct super_block *s) | |
1002 | { | |
3d14c5d2 | 1003 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 1004 | dout("kill_sb %p\n", s); |
3d14c5d2 | 1005 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 1006 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
1007 | ceph_mdsc_destroy(fsc); |
1008 | destroy_fs_client(fsc); | |
16725b9d SW |
1009 | } |
1010 | ||
1011 | static struct file_system_type ceph_fs_type = { | |
1012 | .owner = THIS_MODULE, | |
1013 | .name = "ceph", | |
a7f9fb20 | 1014 | .mount = ceph_mount, |
16725b9d SW |
1015 | .kill_sb = ceph_kill_sb, |
1016 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1017 | }; | |
7f78e035 | 1018 | MODULE_ALIAS_FS("ceph"); |
16725b9d SW |
1019 | |
1020 | #define _STRINGIFY(x) #x | |
1021 | #define STRINGIFY(x) _STRINGIFY(x) | |
1022 | ||
1023 | static int __init init_ceph(void) | |
1024 | { | |
3d14c5d2 | 1025 | int ret = init_caches(); |
16725b9d | 1026 | if (ret) |
3d14c5d2 | 1027 | goto out; |
16725b9d | 1028 | |
eb13e832 | 1029 | ceph_flock_init(); |
3ce6cd12 | 1030 | ceph_xattr_init(); |
16725b9d SW |
1031 | ret = register_filesystem(&ceph_fs_type); |
1032 | if (ret) | |
1033 | goto out_icache; | |
1034 | ||
3d14c5d2 YS |
1035 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1036 | ||
16725b9d SW |
1037 | return 0; |
1038 | ||
1039 | out_icache: | |
3ce6cd12 | 1040 | ceph_xattr_exit(); |
16725b9d | 1041 | destroy_caches(); |
16725b9d SW |
1042 | out: |
1043 | return ret; | |
1044 | } | |
1045 | ||
1046 | static void __exit exit_ceph(void) | |
1047 | { | |
1048 | dout("exit_ceph\n"); | |
1049 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 1050 | ceph_xattr_exit(); |
16725b9d | 1051 | destroy_caches(); |
16725b9d SW |
1052 | } |
1053 | ||
1054 | module_init(init_ceph); | |
1055 | module_exit(exit_ceph); | |
1056 | ||
1057 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1058 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1059 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1060 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1061 | MODULE_LICENSE("GPL"); |