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Commit | Line | Data |
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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); |
16725b9d SW |
43 | } |
44 | ||
45 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
46 | { | |
2b0143b5 | 47 | struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry)); |
3d14c5d2 | 48 | struct ceph_monmap *monmap = fsc->client->monc.monmap; |
16725b9d SW |
49 | struct ceph_statfs st; |
50 | u64 fsid; | |
51 | int err; | |
06d74376 DF |
52 | u64 data_pool; |
53 | ||
54 | if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) { | |
55 | data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0]; | |
56 | } else { | |
57 | data_pool = CEPH_NOPOOL; | |
58 | } | |
16725b9d SW |
59 | |
60 | dout("statfs\n"); | |
06d74376 | 61 | err = ceph_monc_do_statfs(&fsc->client->monc, data_pool, &st); |
16725b9d SW |
62 | if (err < 0) |
63 | return err; | |
64 | ||
65 | /* fill in kstatfs */ | |
66 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
67 | ||
68 | /* | |
69 | * express utilization in terms of large blocks to avoid | |
70 | * overflow on 32-bit machines. | |
92a49fb0 SW |
71 | * |
72 | * NOTE: for the time being, we make bsize == frsize to humor | |
73 | * not-yet-ancient versions of glibc that are broken. | |
74 | * Someday, we will probably want to report a real block | |
75 | * size... whatever that may mean for a network file system! | |
16725b9d SW |
76 | */ |
77 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
92a49fb0 | 78 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
16725b9d | 79 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); |
8f04d422 | 80 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
16725b9d SW |
81 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
82 | ||
83 | buf->f_files = le64_to_cpu(st.num_objects); | |
84 | buf->f_ffree = -1; | |
558d3499 | 85 | buf->f_namelen = NAME_MAX; |
16725b9d | 86 | |
080a330e JL |
87 | /* Must convert the fsid, for consistent values across arches */ |
88 | fsid = le64_to_cpu(*(__le64 *)(&monmap->fsid)) ^ | |
89 | le64_to_cpu(*((__le64 *)&monmap->fsid + 1)); | |
16725b9d SW |
90 | buf->f_fsid.val[0] = fsid & 0xffffffff; |
91 | buf->f_fsid.val[1] = fsid >> 32; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | ||
2d9c98ae | 97 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 98 | { |
3d14c5d2 | 99 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
100 | |
101 | if (!wait) { | |
102 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 103 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
104 | dout("sync_fs (non-blocking) done\n"); |
105 | return 0; | |
106 | } | |
107 | ||
108 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
109 | ceph_osdc_sync(&fsc->client->osdc); |
110 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 111 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
112 | return 0; |
113 | } | |
114 | ||
16725b9d SW |
115 | /* |
116 | * mount options | |
117 | */ | |
118 | enum { | |
16725b9d SW |
119 | Opt_wsize, |
120 | Opt_rsize, | |
83817e35 | 121 | Opt_rasize, |
16725b9d SW |
122 | Opt_caps_wanted_delay_min, |
123 | Opt_caps_wanted_delay_max, | |
124 | Opt_readdir_max_entries, | |
23804d91 | 125 | Opt_readdir_max_bytes, |
2baba250 | 126 | Opt_congestion_kb, |
e53c2fe0 | 127 | Opt_last_int, |
16725b9d SW |
128 | /* int args above */ |
129 | Opt_snapdirname, | |
430afbad | 130 | Opt_mds_namespace, |
1d8f8360 | 131 | Opt_fscache_uniq, |
e53c2fe0 | 132 | Opt_last_string, |
16725b9d | 133 | /* string args above */ |
16725b9d SW |
134 | Opt_dirstat, |
135 | Opt_nodirstat, | |
136 | Opt_rbytes, | |
137 | Opt_norbytes, | |
cffaba15 | 138 | Opt_asyncreaddir, |
16725b9d | 139 | Opt_noasyncreaddir, |
a40dc6cc SW |
140 | Opt_dcache, |
141 | Opt_nodcache, | |
ad1fee96 | 142 | Opt_ino32, |
cffaba15 | 143 | Opt_noino32, |
99ccbd22 | 144 | Opt_fscache, |
45195e42 | 145 | Opt_nofscache, |
10183a69 YZ |
146 | Opt_poolperm, |
147 | Opt_nopoolperm, | |
e9e427f0 YZ |
148 | Opt_require_active_mds, |
149 | Opt_norequire_active_mds, | |
45195e42 SW |
150 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
151 | Opt_acl, | |
152 | #endif | |
10183a69 | 153 | Opt_noacl, |
16725b9d SW |
154 | }; |
155 | ||
3d14c5d2 | 156 | static match_table_t fsopt_tokens = { |
16725b9d SW |
157 | {Opt_wsize, "wsize=%d"}, |
158 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 159 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
160 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
161 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
162 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, | |
23804d91 | 163 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 164 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
165 | /* int args above */ |
166 | {Opt_snapdirname, "snapdirname=%s"}, | |
430afbad | 167 | {Opt_mds_namespace, "mds_namespace=%s"}, |
1d8f8360 | 168 | {Opt_fscache_uniq, "fsc=%s"}, |
16725b9d | 169 | /* string args above */ |
16725b9d SW |
170 | {Opt_dirstat, "dirstat"}, |
171 | {Opt_nodirstat, "nodirstat"}, | |
172 | {Opt_rbytes, "rbytes"}, | |
173 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 174 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 175 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
176 | {Opt_dcache, "dcache"}, |
177 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 178 | {Opt_ino32, "ino32"}, |
cffaba15 | 179 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
180 | {Opt_fscache, "fsc"}, |
181 | {Opt_nofscache, "nofsc"}, | |
10183a69 YZ |
182 | {Opt_poolperm, "poolperm"}, |
183 | {Opt_nopoolperm, "nopoolperm"}, | |
e9e427f0 YZ |
184 | {Opt_require_active_mds, "require_active_mds"}, |
185 | {Opt_norequire_active_mds, "norequire_active_mds"}, | |
45195e42 SW |
186 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
187 | {Opt_acl, "acl"}, | |
188 | #endif | |
189 | {Opt_noacl, "noacl"}, | |
16725b9d SW |
190 | {-1, NULL} |
191 | }; | |
192 | ||
3d14c5d2 | 193 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 194 | { |
3d14c5d2 YS |
195 | struct ceph_mount_options *fsopt = private; |
196 | substring_t argstr[MAX_OPT_ARGS]; | |
197 | int token, intval, ret; | |
198 | ||
199 | token = match_token((char *)c, fsopt_tokens, argstr); | |
200 | if (token < 0) | |
201 | return -EINVAL; | |
202 | ||
203 | if (token < Opt_last_int) { | |
204 | ret = match_int(&argstr[0], &intval); | |
205 | if (ret < 0) { | |
206 | pr_err("bad mount option arg (not int) " | |
207 | "at '%s'\n", c); | |
208 | return ret; | |
c309f0ab | 209 | } |
3d14c5d2 YS |
210 | dout("got int token %d val %d\n", token, intval); |
211 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
212 | dout("got string token %d val %s\n", token, | |
213 | argstr[0].from); | |
214 | } else { | |
215 | dout("got token %d\n", token); | |
c309f0ab SW |
216 | } |
217 | ||
3d14c5d2 YS |
218 | switch (token) { |
219 | case Opt_snapdirname: | |
220 | kfree(fsopt->snapdir_name); | |
221 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
222 | argstr[0].to-argstr[0].from, | |
223 | GFP_KERNEL); | |
224 | if (!fsopt->snapdir_name) | |
225 | return -ENOMEM; | |
226 | break; | |
235a0982 | 227 | case Opt_mds_namespace: |
430afbad YZ |
228 | fsopt->mds_namespace = kstrndup(argstr[0].from, |
229 | argstr[0].to-argstr[0].from, | |
230 | GFP_KERNEL); | |
231 | if (!fsopt->mds_namespace) | |
232 | return -ENOMEM; | |
235a0982 | 233 | break; |
1d8f8360 YZ |
234 | case Opt_fscache_uniq: |
235 | fsopt->fscache_uniq = kstrndup(argstr[0].from, | |
236 | argstr[0].to-argstr[0].from, | |
237 | GFP_KERNEL); | |
238 | if (!fsopt->fscache_uniq) | |
239 | return -ENOMEM; | |
240 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
241 | break; | |
430afbad | 242 | /* misc */ |
3d14c5d2 | 243 | case Opt_wsize: |
95cca2b4 YZ |
244 | if (intval < PAGE_SIZE || intval > CEPH_MAX_WRITE_SIZE) |
245 | return -EINVAL; | |
246 | fsopt->wsize = ALIGN(intval, PAGE_SIZE); | |
3d14c5d2 YS |
247 | break; |
248 | case Opt_rsize: | |
aa187926 YZ |
249 | if (intval < PAGE_SIZE || intval > CEPH_MAX_READ_SIZE) |
250 | return -EINVAL; | |
251 | fsopt->rsize = ALIGN(intval, PAGE_SIZE); | |
3d14c5d2 | 252 | break; |
83817e35 | 253 | case Opt_rasize: |
4214fb15 YZ |
254 | if (intval < 0) |
255 | return -EINVAL; | |
256 | fsopt->rasize = ALIGN(intval + PAGE_SIZE - 1, PAGE_SIZE); | |
83817e35 | 257 | break; |
3d14c5d2 | 258 | case Opt_caps_wanted_delay_min: |
4214fb15 YZ |
259 | if (intval < 1) |
260 | return -EINVAL; | |
3d14c5d2 YS |
261 | fsopt->caps_wanted_delay_min = intval; |
262 | break; | |
263 | case Opt_caps_wanted_delay_max: | |
4214fb15 YZ |
264 | if (intval < 1) |
265 | return -EINVAL; | |
3d14c5d2 YS |
266 | fsopt->caps_wanted_delay_max = intval; |
267 | break; | |
268 | case Opt_readdir_max_entries: | |
4214fb15 YZ |
269 | if (intval < 1) |
270 | return -EINVAL; | |
3d14c5d2 YS |
271 | fsopt->max_readdir = intval; |
272 | break; | |
273 | case Opt_readdir_max_bytes: | |
4214fb15 YZ |
274 | if (intval < PAGE_SIZE && intval != 0) |
275 | return -EINVAL; | |
3d14c5d2 YS |
276 | fsopt->max_readdir_bytes = intval; |
277 | break; | |
278 | case Opt_congestion_kb: | |
4214fb15 YZ |
279 | if (intval < 1024) /* at least 1M */ |
280 | return -EINVAL; | |
3d14c5d2 YS |
281 | fsopt->congestion_kb = intval; |
282 | break; | |
283 | case Opt_dirstat: | |
284 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
285 | break; | |
286 | case Opt_nodirstat: | |
287 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
288 | break; | |
289 | case Opt_rbytes: | |
290 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
291 | break; | |
292 | case Opt_norbytes: | |
293 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
294 | break; | |
cffaba15 AE |
295 | case Opt_asyncreaddir: |
296 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
297 | break; | |
3d14c5d2 YS |
298 | case Opt_noasyncreaddir: |
299 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
300 | break; | |
a40dc6cc SW |
301 | case Opt_dcache: |
302 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
303 | break; | |
304 | case Opt_nodcache: | |
305 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
306 | break; | |
ad1fee96 YS |
307 | case Opt_ino32: |
308 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
309 | break; | |
cffaba15 AE |
310 | case Opt_noino32: |
311 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
312 | break; | |
99ccbd22 MT |
313 | case Opt_fscache: |
314 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
315 | break; | |
316 | case Opt_nofscache: | |
317 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
318 | break; | |
10183a69 YZ |
319 | case Opt_poolperm: |
320 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; | |
321 | printk ("pool perm"); | |
322 | break; | |
323 | case Opt_nopoolperm: | |
324 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; | |
325 | break; | |
e9e427f0 YZ |
326 | case Opt_require_active_mds: |
327 | fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT; | |
328 | break; | |
329 | case Opt_norequire_active_mds: | |
330 | fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT; | |
331 | break; | |
45195e42 SW |
332 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
333 | case Opt_acl: | |
334 | fsopt->sb_flags |= MS_POSIXACL; | |
335 | break; | |
336 | #endif | |
337 | case Opt_noacl: | |
338 | fsopt->sb_flags &= ~MS_POSIXACL; | |
339 | break; | |
3d14c5d2 YS |
340 | default: |
341 | BUG_ON(token); | |
342 | } | |
343 | return 0; | |
c309f0ab | 344 | } |
16725b9d | 345 | |
3d14c5d2 | 346 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 347 | { |
3d14c5d2 YS |
348 | dout("destroy_mount_options %p\n", args); |
349 | kfree(args->snapdir_name); | |
430afbad | 350 | kfree(args->mds_namespace); |
3f384954 | 351 | kfree(args->server_path); |
1d8f8360 | 352 | kfree(args->fscache_uniq); |
3d14c5d2 YS |
353 | kfree(args); |
354 | } | |
16725b9d | 355 | |
3d14c5d2 YS |
356 | static int strcmp_null(const char *s1, const char *s2) |
357 | { | |
358 | if (!s1 && !s2) | |
359 | return 0; | |
360 | if (s1 && !s2) | |
361 | return -1; | |
362 | if (!s1 && s2) | |
363 | return 1; | |
364 | return strcmp(s1, s2); | |
365 | } | |
16725b9d | 366 | |
3d14c5d2 YS |
367 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
368 | struct ceph_options *new_opt, | |
369 | struct ceph_fs_client *fsc) | |
370 | { | |
371 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
372 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
373 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
374 | int ret; | |
16725b9d | 375 | |
3d14c5d2 YS |
376 | ret = memcmp(fsopt1, fsopt2, ofs); |
377 | if (ret) | |
378 | return ret; | |
379 | ||
380 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
430afbad YZ |
381 | if (ret) |
382 | return ret; | |
383 | ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); | |
3d14c5d2 YS |
384 | if (ret) |
385 | return ret; | |
3f384954 | 386 | ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); |
1d8f8360 YZ |
387 | if (ret) |
388 | return ret; | |
389 | ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq); | |
3f384954 YZ |
390 | if (ret) |
391 | return ret; | |
392 | ||
3d14c5d2 YS |
393 | return ceph_compare_options(new_opt, fsc->client); |
394 | } | |
395 | ||
396 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
397 | struct ceph_options **popt, | |
398 | int flags, char *options, | |
3f384954 | 399 | const char *dev_name) |
3d14c5d2 YS |
400 | { |
401 | struct ceph_mount_options *fsopt; | |
402 | const char *dev_name_end; | |
c98f533c AE |
403 | int err; |
404 | ||
405 | if (!dev_name || !*dev_name) | |
406 | return -EINVAL; | |
3d14c5d2 YS |
407 | |
408 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
409 | if (!fsopt) | |
410 | return -ENOMEM; | |
411 | ||
412 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
413 | ||
80db8bea NW |
414 | fsopt->sb_flags = flags; |
415 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 416 | |
95cca2b4 | 417 | fsopt->wsize = CEPH_MAX_WRITE_SIZE; |
aa187926 | 418 | fsopt->rsize = CEPH_MAX_READ_SIZE; |
80db8bea NW |
419 | fsopt->rasize = CEPH_RASIZE_DEFAULT; |
420 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
a149bb9a SK |
421 | if (!fsopt->snapdir_name) { |
422 | err = -ENOMEM; | |
423 | goto out; | |
424 | } | |
425 | ||
50aac4fe SW |
426 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
427 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
428 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; |
429 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
430 | fsopt->congestion_kb = default_congestion_kb(); | |
431 | ||
c98f533c AE |
432 | /* |
433 | * Distinguish the server list from the path in "dev_name". | |
434 | * Internally we do not include the leading '/' in the path. | |
435 | * | |
436 | * "dev_name" will look like: | |
437 | * <server_spec>[,<server_spec>...]:[<path>] | |
438 | * where | |
439 | * <server_spec> is <ip>[:<port>] | |
440 | * <path> is optional, but if present must begin with '/' | |
441 | */ | |
442 | dev_name_end = strchr(dev_name, '/'); | |
443 | if (dev_name_end) { | |
ce2728aa YZ |
444 | if (strlen(dev_name_end) > 1) { |
445 | fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); | |
446 | if (!fsopt->server_path) { | |
447 | err = -ENOMEM; | |
448 | goto out; | |
449 | } | |
3f384954 | 450 | } |
c98f533c | 451 | } else { |
c98f533c | 452 | dev_name_end = dev_name + strlen(dev_name); |
c98f533c | 453 | } |
80db8bea | 454 | err = -EINVAL; |
c98f533c | 455 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 456 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 457 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
458 | dev_name); |
459 | goto out; | |
460 | } | |
3d14c5d2 | 461 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
3f384954 YZ |
462 | if (fsopt->server_path) |
463 | dout("server path '%s'\n", fsopt->server_path); | |
16725b9d | 464 | |
ee57741c | 465 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 466 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
467 | if (IS_ERR(*popt)) { |
468 | err = PTR_ERR(*popt); | |
3d14c5d2 | 469 | goto out; |
ee57741c | 470 | } |
3d14c5d2 YS |
471 | |
472 | /* success */ | |
473 | *pfsopt = fsopt; | |
474 | return 0; | |
16725b9d | 475 | |
7b813c46 | 476 | out: |
3d14c5d2 YS |
477 | destroy_mount_options(fsopt); |
478 | return err; | |
16725b9d SW |
479 | } |
480 | ||
3d14c5d2 YS |
481 | /** |
482 | * ceph_show_options - Show mount options in /proc/mounts | |
483 | * @m: seq_file to write to | |
34c80b1d | 484 | * @root: root of that (sub)tree |
3d14c5d2 | 485 | */ |
34c80b1d | 486 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 487 | { |
34c80b1d | 488 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 | 489 | struct ceph_mount_options *fsopt = fsc->mount_options; |
ff40f9ae ID |
490 | size_t pos; |
491 | int ret; | |
492 | ||
493 | /* a comma between MNT/MS and client options */ | |
494 | seq_putc(m, ','); | |
495 | pos = m->count; | |
496 | ||
497 | ret = ceph_print_client_options(m, fsc->client); | |
498 | if (ret) | |
499 | return ret; | |
500 | ||
501 | /* retract our comma if no client options */ | |
502 | if (m->count == pos) | |
503 | m->count--; | |
3d14c5d2 YS |
504 | |
505 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
506 | seq_puts(m, ",dirstat"); | |
133e9156 YZ |
507 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
508 | seq_puts(m, ",rbytes"); | |
3d14c5d2 YS |
509 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
510 | seq_puts(m, ",noasyncreaddir"); | |
ff7eeb82 | 511 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
a40dc6cc | 512 | seq_puts(m, ",nodcache"); |
1d8f8360 YZ |
513 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) { |
514 | if (fsopt->fscache_uniq) | |
515 | seq_printf(m, ",fsc=%s", fsopt->fscache_uniq); | |
516 | else | |
517 | seq_puts(m, ",fsc"); | |
518 | } | |
10183a69 YZ |
519 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
520 | seq_puts(m, ",nopoolperm"); | |
3d14c5d2 | 521 | |
45195e42 SW |
522 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
523 | if (fsopt->sb_flags & MS_POSIXACL) | |
524 | seq_puts(m, ",acl"); | |
525 | else | |
526 | seq_puts(m, ",noacl"); | |
527 | #endif | |
528 | ||
430afbad YZ |
529 | if (fsopt->mds_namespace) |
530 | seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace); | |
3d14c5d2 YS |
531 | if (fsopt->wsize) |
532 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
aa187926 | 533 | if (fsopt->rsize != CEPH_MAX_READ_SIZE) |
3d14c5d2 | 534 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 535 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 536 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
537 | if (fsopt->congestion_kb != default_congestion_kb()) |
538 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
539 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
540 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
541 | fsopt->caps_wanted_delay_min); | |
542 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
543 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
544 | fsopt->caps_wanted_delay_max); | |
3d14c5d2 YS |
545 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
546 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
547 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
548 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
549 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
a068acf2 | 550 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
ff40f9ae | 551 | |
3d14c5d2 | 552 | return 0; |
16725b9d SW |
553 | } |
554 | ||
555 | /* | |
3d14c5d2 YS |
556 | * handle any mon messages the standard library doesn't understand. |
557 | * return error if we don't either. | |
16725b9d | 558 | */ |
3d14c5d2 | 559 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 560 | { |
3d14c5d2 YS |
561 | struct ceph_fs_client *fsc = client->private; |
562 | int type = le16_to_cpu(msg->hdr.type); | |
563 | ||
564 | switch (type) { | |
565 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
566 | ceph_mdsc_handle_mdsmap(fsc->mdsc, msg); |
567 | return 0; | |
568 | case CEPH_MSG_FS_MAP_USER: | |
569 | ceph_mdsc_handle_fsmap(fsc->mdsc, msg); | |
3d14c5d2 | 570 | return 0; |
3d14c5d2 YS |
571 | default: |
572 | return -1; | |
573 | } | |
574 | } | |
575 | ||
576 | /* | |
577 | * create a new fs client | |
578 | */ | |
0c6d4b4e | 579 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
580 | struct ceph_options *opt) |
581 | { | |
582 | struct ceph_fs_client *fsc; | |
3bf53337 AE |
583 | int page_count; |
584 | size_t size; | |
16725b9d SW |
585 | int err = -ENOMEM; |
586 | ||
3d14c5d2 YS |
587 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
588 | if (!fsc) | |
16725b9d SW |
589 | return ERR_PTR(-ENOMEM); |
590 | ||
74da4a0f | 591 | fsc->client = ceph_create_client(opt, fsc); |
3d14c5d2 YS |
592 | if (IS_ERR(fsc->client)) { |
593 | err = PTR_ERR(fsc->client); | |
594 | goto fail; | |
595 | } | |
596 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
430afbad | 597 | |
d37b1d99 | 598 | if (!fsopt->mds_namespace) { |
430afbad YZ |
599 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, |
600 | 0, true); | |
601 | } else { | |
602 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP, | |
603 | 0, false); | |
604 | } | |
16725b9d | 605 | |
3d14c5d2 | 606 | fsc->mount_options = fsopt; |
16725b9d | 607 | |
3d14c5d2 YS |
608 | fsc->sb = NULL; |
609 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 610 | |
3d14c5d2 | 611 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d SW |
612 | |
613 | err = -ENOMEM; | |
01e6acc4 TH |
614 | /* |
615 | * The number of concurrent works can be high but they don't need | |
616 | * to be processed in parallel, limit concurrency. | |
617 | */ | |
618 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
d37b1d99 | 619 | if (!fsc->wb_wq) |
09dc9fc2 | 620 | goto fail_client; |
01e6acc4 | 621 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
d37b1d99 | 622 | if (!fsc->pg_inv_wq) |
16725b9d | 623 | goto fail_wb_wq; |
01e6acc4 | 624 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
d37b1d99 | 625 | if (!fsc->trunc_wq) |
16725b9d SW |
626 | goto fail_pg_inv_wq; |
627 | ||
b9bfb93c SW |
628 | /* set up mempools */ |
629 | err = -ENOMEM; | |
09cbfeaf | 630 | page_count = fsc->mount_options->wsize >> PAGE_SHIFT; |
3bf53337 AE |
631 | size = sizeof (struct page *) * (page_count ? page_count : 1); |
632 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 633 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
634 | goto fail_trunc_wq; |
635 | ||
85ccce43 | 636 | /* caps */ |
3d14c5d2 YS |
637 | fsc->min_caps = fsopt->max_readdir; |
638 | ||
639 | return fsc; | |
b9bfb93c | 640 | |
16725b9d | 641 | fail_trunc_wq: |
3d14c5d2 | 642 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 643 | fail_pg_inv_wq: |
3d14c5d2 | 644 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 645 | fail_wb_wq: |
3d14c5d2 | 646 | destroy_workqueue(fsc->wb_wq); |
3d14c5d2 YS |
647 | fail_client: |
648 | ceph_destroy_client(fsc->client); | |
16725b9d | 649 | fail: |
3d14c5d2 | 650 | kfree(fsc); |
16725b9d SW |
651 | return ERR_PTR(err); |
652 | } | |
653 | ||
0c6d4b4e | 654 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 655 | { |
3d14c5d2 | 656 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 657 | |
3d14c5d2 YS |
658 | destroy_workqueue(fsc->wb_wq); |
659 | destroy_workqueue(fsc->pg_inv_wq); | |
660 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 661 | |
3d14c5d2 | 662 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 663 | |
3d14c5d2 | 664 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 665 | |
3d14c5d2 | 666 | ceph_destroy_client(fsc->client); |
16725b9d | 667 | |
3d14c5d2 YS |
668 | kfree(fsc); |
669 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
670 | } |
671 | ||
0743304d | 672 | /* |
3d14c5d2 | 673 | * caches |
0743304d | 674 | */ |
3d14c5d2 YS |
675 | struct kmem_cache *ceph_inode_cachep; |
676 | struct kmem_cache *ceph_cap_cachep; | |
f66fd9f0 | 677 | struct kmem_cache *ceph_cap_flush_cachep; |
3d14c5d2 YS |
678 | struct kmem_cache *ceph_dentry_cachep; |
679 | struct kmem_cache *ceph_file_cachep; | |
680 | ||
681 | static void ceph_inode_init_once(void *foo) | |
0743304d | 682 | { |
3d14c5d2 YS |
683 | struct ceph_inode_info *ci = foo; |
684 | inode_init_once(&ci->vfs_inode); | |
685 | } | |
686 | ||
687 | static int __init init_caches(void) | |
688 | { | |
99ccbd22 MT |
689 | int error = -ENOMEM; |
690 | ||
3d14c5d2 YS |
691 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
692 | sizeof(struct ceph_inode_info), | |
693 | __alignof__(struct ceph_inode_info), | |
5d097056 VD |
694 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
695 | SLAB_ACCOUNT, ceph_inode_init_once); | |
d37b1d99 | 696 | if (!ceph_inode_cachep) |
3d14c5d2 YS |
697 | return -ENOMEM; |
698 | ||
699 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
700 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
d37b1d99 | 701 | if (!ceph_cap_cachep) |
3d14c5d2 | 702 | goto bad_cap; |
f66fd9f0 YZ |
703 | ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, |
704 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
d37b1d99 | 705 | if (!ceph_cap_flush_cachep) |
f66fd9f0 | 706 | goto bad_cap_flush; |
3d14c5d2 YS |
707 | |
708 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
709 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
d37b1d99 | 710 | if (!ceph_dentry_cachep) |
3d14c5d2 YS |
711 | goto bad_dentry; |
712 | ||
6b1a9a6c NB |
713 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD); |
714 | ||
d37b1d99 | 715 | if (!ceph_file_cachep) |
3d14c5d2 YS |
716 | goto bad_file; |
717 | ||
99ccbd22 MT |
718 | if ((error = ceph_fscache_register())) |
719 | goto bad_file; | |
3d14c5d2 | 720 | |
99ccbd22 | 721 | return 0; |
3d14c5d2 YS |
722 | bad_file: |
723 | kmem_cache_destroy(ceph_dentry_cachep); | |
724 | bad_dentry: | |
f66fd9f0 YZ |
725 | kmem_cache_destroy(ceph_cap_flush_cachep); |
726 | bad_cap_flush: | |
3d14c5d2 YS |
727 | kmem_cache_destroy(ceph_cap_cachep); |
728 | bad_cap: | |
729 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 730 | return error; |
0743304d SW |
731 | } |
732 | ||
3d14c5d2 YS |
733 | static void destroy_caches(void) |
734 | { | |
8c0a8537 KS |
735 | /* |
736 | * Make sure all delayed rcu free inodes are flushed before we | |
737 | * destroy cache. | |
738 | */ | |
739 | rcu_barrier(); | |
99ccbd22 | 740 | |
3d14c5d2 YS |
741 | kmem_cache_destroy(ceph_inode_cachep); |
742 | kmem_cache_destroy(ceph_cap_cachep); | |
f66fd9f0 | 743 | kmem_cache_destroy(ceph_cap_flush_cachep); |
3d14c5d2 YS |
744 | kmem_cache_destroy(ceph_dentry_cachep); |
745 | kmem_cache_destroy(ceph_file_cachep); | |
99ccbd22 MT |
746 | |
747 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
748 | } |
749 | ||
750 | ||
16725b9d | 751 | /* |
3d14c5d2 YS |
752 | * ceph_umount_begin - initiate forced umount. Tear down down the |
753 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 754 | */ |
3d14c5d2 | 755 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 756 | { |
3d14c5d2 YS |
757 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
758 | ||
759 | dout("ceph_umount_begin - starting forced umount\n"); | |
760 | if (!fsc) | |
761 | return; | |
762 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
48fec5d0 | 763 | ceph_mdsc_force_umount(fsc->mdsc); |
3d14c5d2 | 764 | return; |
16725b9d SW |
765 | } |
766 | ||
3d14c5d2 YS |
767 | static const struct super_operations ceph_super_ops = { |
768 | .alloc_inode = ceph_alloc_inode, | |
769 | .destroy_inode = ceph_destroy_inode, | |
770 | .write_inode = ceph_write_inode, | |
9f12bd11 | 771 | .drop_inode = ceph_drop_inode, |
3d14c5d2 YS |
772 | .sync_fs = ceph_sync_fs, |
773 | .put_super = ceph_put_super, | |
774 | .show_options = ceph_show_options, | |
775 | .statfs = ceph_statfs, | |
776 | .umount_begin = ceph_umount_begin, | |
777 | }; | |
778 | ||
16725b9d SW |
779 | /* |
780 | * Bootstrap mount by opening the root directory. Note the mount | |
781 | * @started time from caller, and time out if this takes too long. | |
782 | */ | |
3d14c5d2 | 783 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
784 | const char *path, |
785 | unsigned long started) | |
786 | { | |
3d14c5d2 | 787 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
788 | struct ceph_mds_request *req = NULL; |
789 | int err; | |
790 | struct dentry *root; | |
791 | ||
792 | /* open dir */ | |
793 | dout("open_root_inode opening '%s'\n", path); | |
794 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
795 | if (IS_ERR(req)) | |
7e34bc52 | 796 | return ERR_CAST(req); |
16725b9d | 797 | req->r_path1 = kstrdup(path, GFP_NOFS); |
a149bb9a SK |
798 | if (!req->r_path1) { |
799 | root = ERR_PTR(-ENOMEM); | |
800 | goto out; | |
801 | } | |
802 | ||
16725b9d SW |
803 | req->r_ino1.ino = CEPH_INO_ROOT; |
804 | req->r_ino1.snap = CEPH_NOSNAP; | |
805 | req->r_started = started; | |
a319bf56 | 806 | req->r_timeout = fsc->client->options->mount_timeout; |
16725b9d SW |
807 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
808 | req->r_num_caps = 2; | |
809 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
810 | if (err == 0) { | |
3c5184ef AV |
811 | struct inode *inode = req->r_target_inode; |
812 | req->r_target_inode = NULL; | |
16725b9d | 813 | dout("open_root_inode success\n"); |
ce2728aa YZ |
814 | root = d_make_root(inode); |
815 | if (!root) { | |
816 | root = ERR_PTR(-ENOMEM); | |
817 | goto out; | |
774ac21d | 818 | } |
16725b9d SW |
819 | dout("open_root_inode success, root dentry is %p\n", root); |
820 | } else { | |
821 | root = ERR_PTR(err); | |
822 | } | |
3c5184ef | 823 | out: |
16725b9d SW |
824 | ceph_mdsc_put_request(req); |
825 | return root; | |
826 | } | |
827 | ||
3d14c5d2 YS |
828 | |
829 | ||
830 | ||
16725b9d SW |
831 | /* |
832 | * mount: join the ceph cluster, and open root directory. | |
833 | */ | |
3f384954 | 834 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc) |
16725b9d | 835 | { |
16725b9d | 836 | int err; |
16725b9d SW |
837 | unsigned long started = jiffies; /* note the start time */ |
838 | struct dentry *root; | |
3d14c5d2 | 839 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d | 840 | |
132ca7e1 | 841 | dout("mount start %p\n", fsc); |
3d14c5d2 | 842 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 843 | |
132ca7e1 | 844 | if (!fsc->sb->s_root) { |
ce2728aa | 845 | const char *path; |
132ca7e1 YZ |
846 | err = __ceph_open_session(fsc->client, started); |
847 | if (err < 0) | |
848 | goto out; | |
16725b9d | 849 | |
1d8f8360 YZ |
850 | /* setup fscache */ |
851 | if (fsc->mount_options->flags & CEPH_MOUNT_OPT_FSCACHE) { | |
852 | err = ceph_fscache_register_fs(fsc); | |
853 | if (err < 0) | |
854 | goto out; | |
855 | } | |
856 | ||
ce2728aa YZ |
857 | if (!fsc->mount_options->server_path) { |
858 | path = ""; | |
859 | dout("mount opening path \\t\n"); | |
860 | } else { | |
861 | path = fsc->mount_options->server_path + 1; | |
862 | dout("mount opening path %s\n", path); | |
863 | } | |
864 | root = open_root_dentry(fsc, path, started); | |
132ca7e1 YZ |
865 | if (IS_ERR(root)) { |
866 | err = PTR_ERR(root); | |
867 | goto out; | |
868 | } | |
ce2728aa | 869 | fsc->sb->s_root = dget(root); |
3d14c5d2 YS |
870 | first = 1; |
871 | ||
872 | err = ceph_fs_debugfs_init(fsc); | |
873 | if (err < 0) | |
874 | goto fail; | |
31ca5878 GU |
875 | } else { |
876 | root = dget(fsc->sb->s_root); | |
3d14c5d2 | 877 | } |
16725b9d | 878 | |
3d14c5d2 | 879 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 880 | dout("mount success\n"); |
a7f9fb20 AV |
881 | mutex_unlock(&fsc->client->mount_mutex); |
882 | return root; | |
16725b9d | 883 | |
3d14c5d2 YS |
884 | fail: |
885 | if (first) { | |
886 | dput(fsc->sb->s_root); | |
887 | fsc->sb->s_root = NULL; | |
888 | } | |
132ca7e1 YZ |
889 | out: |
890 | mutex_unlock(&fsc->client->mount_mutex); | |
891 | return ERR_PTR(err); | |
16725b9d SW |
892 | } |
893 | ||
894 | static int ceph_set_super(struct super_block *s, void *data) | |
895 | { | |
3d14c5d2 | 896 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
897 | int ret; |
898 | ||
899 | dout("set_super %p data %p\n", s, data); | |
900 | ||
3d14c5d2 | 901 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
902 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
903 | ||
7221fe4c | 904 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
905 | s->s_fs_info = fsc; |
906 | fsc->sb = s; | |
16725b9d SW |
907 | |
908 | s->s_op = &ceph_super_ops; | |
18fc8abd | 909 | s->s_d_op = &ceph_dentry_ops; |
16725b9d SW |
910 | s->s_export_op = &ceph_export_ops; |
911 | ||
912 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
913 | ||
914 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
915 | if (ret != 0) | |
916 | goto fail; | |
917 | ||
918 | return ret; | |
919 | ||
920 | fail: | |
921 | s->s_fs_info = NULL; | |
3d14c5d2 | 922 | fsc->sb = NULL; |
16725b9d SW |
923 | return ret; |
924 | } | |
925 | ||
926 | /* | |
927 | * share superblock if same fs AND options | |
928 | */ | |
929 | static int ceph_compare_super(struct super_block *sb, void *data) | |
930 | { | |
3d14c5d2 YS |
931 | struct ceph_fs_client *new = data; |
932 | struct ceph_mount_options *fsopt = new->mount_options; | |
933 | struct ceph_options *opt = new->client->options; | |
934 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
935 | |
936 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
937 | |
938 | if (compare_mount_options(fsopt, opt, other)) { | |
939 | dout("monitor(s)/mount options don't match\n"); | |
940 | return 0; | |
16725b9d | 941 | } |
3d14c5d2 YS |
942 | if ((opt->flags & CEPH_OPT_FSID) && |
943 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
944 | dout("fsid doesn't match\n"); | |
945 | return 0; | |
946 | } | |
947 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
948 | dout("flags differ\n"); |
949 | return 0; | |
950 | } | |
951 | return 1; | |
952 | } | |
953 | ||
954 | /* | |
955 | * construct our own bdi so we can control readahead, etc. | |
956 | */ | |
00d5643e | 957 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 958 | |
09dc9fc2 | 959 | static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc) |
16725b9d SW |
960 | { |
961 | int err; | |
962 | ||
09dc9fc2 JK |
963 | err = super_setup_bdi_name(sb, "ceph-%ld", |
964 | atomic_long_inc_return(&bdi_seq)); | |
965 | if (err) | |
966 | return err; | |
967 | ||
83817e35 | 968 | /* set ra_pages based on rasize mount option? */ |
4214fb15 | 969 | sb->s_bdi->ra_pages = fsc->mount_options->rasize >> PAGE_SHIFT; |
e9852227 | 970 | |
aa187926 YZ |
971 | /* set io_pages based on max osd read size */ |
972 | sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT; | |
7c94ba27 | 973 | |
09dc9fc2 | 974 | return 0; |
16725b9d SW |
975 | } |
976 | ||
a7f9fb20 AV |
977 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
978 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
979 | { |
980 | struct super_block *sb; | |
3d14c5d2 | 981 | struct ceph_fs_client *fsc; |
a7f9fb20 | 982 | struct dentry *res; |
16725b9d SW |
983 | int err; |
984 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
3d14c5d2 YS |
985 | struct ceph_mount_options *fsopt = NULL; |
986 | struct ceph_options *opt = NULL; | |
16725b9d | 987 | |
a7f9fb20 | 988 | dout("ceph_mount\n"); |
45195e42 SW |
989 | |
990 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
991 | flags |= MS_POSIXACL; | |
992 | #endif | |
3f384954 | 993 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name); |
a7f9fb20 AV |
994 | if (err < 0) { |
995 | res = ERR_PTR(err); | |
6b805185 | 996 | goto out_final; |
a7f9fb20 | 997 | } |
16725b9d SW |
998 | |
999 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
1000 | fsc = create_fs_client(fsopt, opt); |
1001 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 1002 | res = ERR_CAST(fsc); |
259a187a NW |
1003 | destroy_mount_options(fsopt); |
1004 | ceph_destroy_options(opt); | |
6b805185 SW |
1005 | goto out_final; |
1006 | } | |
16725b9d | 1007 | |
3d14c5d2 | 1008 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
1009 | if (err < 0) { |
1010 | res = ERR_PTR(err); | |
3d14c5d2 | 1011 | goto out; |
a7f9fb20 | 1012 | } |
3d14c5d2 YS |
1013 | |
1014 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 1015 | compare_super = NULL; |
9249e17f | 1016 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 1017 | if (IS_ERR(sb)) { |
a7f9fb20 | 1018 | res = ERR_CAST(sb); |
16725b9d SW |
1019 | goto out; |
1020 | } | |
1021 | ||
3d14c5d2 YS |
1022 | if (ceph_sb_to_client(sb) != fsc) { |
1023 | ceph_mdsc_destroy(fsc); | |
1024 | destroy_fs_client(fsc); | |
1025 | fsc = ceph_sb_to_client(sb); | |
1026 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 1027 | } else { |
3d14c5d2 | 1028 | dout("get_sb using new client %p\n", fsc); |
09dc9fc2 | 1029 | err = ceph_setup_bdi(sb, fsc); |
a7f9fb20 AV |
1030 | if (err < 0) { |
1031 | res = ERR_PTR(err); | |
16725b9d | 1032 | goto out_splat; |
a7f9fb20 | 1033 | } |
16725b9d SW |
1034 | } |
1035 | ||
3f384954 | 1036 | res = ceph_real_mount(fsc); |
a7f9fb20 | 1037 | if (IS_ERR(res)) |
16725b9d | 1038 | goto out_splat; |
a7f9fb20 | 1039 | dout("root %p inode %p ino %llx.%llx\n", res, |
2b0143b5 | 1040 | d_inode(res), ceph_vinop(d_inode(res))); |
a7f9fb20 | 1041 | return res; |
16725b9d SW |
1042 | |
1043 | out_splat: | |
3d14c5d2 | 1044 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 1045 | deactivate_locked_super(sb); |
16725b9d SW |
1046 | goto out_final; |
1047 | ||
1048 | out: | |
3d14c5d2 YS |
1049 | ceph_mdsc_destroy(fsc); |
1050 | destroy_fs_client(fsc); | |
16725b9d | 1051 | out_final: |
a7f9fb20 AV |
1052 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
1053 | return res; | |
16725b9d SW |
1054 | } |
1055 | ||
1056 | static void ceph_kill_sb(struct super_block *s) | |
1057 | { | |
3d14c5d2 | 1058 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
e4d27509 CH |
1059 | dev_t dev = s->s_dev; |
1060 | ||
16725b9d | 1061 | dout("kill_sb %p\n", s); |
e4d27509 | 1062 | |
3d14c5d2 | 1063 | ceph_mdsc_pre_umount(fsc->mdsc); |
e4d27509 | 1064 | generic_shutdown_super(s); |
62a65f36 YZ |
1065 | |
1066 | fsc->client->extra_mon_dispatch = NULL; | |
1067 | ceph_fs_debugfs_cleanup(fsc); | |
1068 | ||
1d8f8360 YZ |
1069 | ceph_fscache_unregister_fs(fsc); |
1070 | ||
3d14c5d2 | 1071 | ceph_mdsc_destroy(fsc); |
e4d27509 | 1072 | |
3d14c5d2 | 1073 | destroy_fs_client(fsc); |
e4d27509 | 1074 | free_anon_bdev(dev); |
16725b9d SW |
1075 | } |
1076 | ||
1077 | static struct file_system_type ceph_fs_type = { | |
1078 | .owner = THIS_MODULE, | |
1079 | .name = "ceph", | |
a7f9fb20 | 1080 | .mount = ceph_mount, |
16725b9d SW |
1081 | .kill_sb = ceph_kill_sb, |
1082 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1083 | }; | |
7f78e035 | 1084 | MODULE_ALIAS_FS("ceph"); |
16725b9d | 1085 | |
16725b9d SW |
1086 | static int __init init_ceph(void) |
1087 | { | |
3d14c5d2 | 1088 | int ret = init_caches(); |
16725b9d | 1089 | if (ret) |
3d14c5d2 | 1090 | goto out; |
16725b9d | 1091 | |
eb13e832 | 1092 | ceph_flock_init(); |
3ce6cd12 | 1093 | ceph_xattr_init(); |
16725b9d SW |
1094 | ret = register_filesystem(&ceph_fs_type); |
1095 | if (ret) | |
34b759b4 | 1096 | goto out_xattr; |
16725b9d | 1097 | |
3d14c5d2 YS |
1098 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1099 | ||
16725b9d SW |
1100 | return 0; |
1101 | ||
97c85a82 | 1102 | out_xattr: |
3ce6cd12 | 1103 | ceph_xattr_exit(); |
16725b9d | 1104 | destroy_caches(); |
16725b9d SW |
1105 | out: |
1106 | return ret; | |
1107 | } | |
1108 | ||
1109 | static void __exit exit_ceph(void) | |
1110 | { | |
1111 | dout("exit_ceph\n"); | |
1112 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 1113 | ceph_xattr_exit(); |
16725b9d | 1114 | destroy_caches(); |
16725b9d SW |
1115 | } |
1116 | ||
1117 | module_init(init_ceph); | |
1118 | module_exit(exit_ceph); | |
1119 | ||
1120 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1121 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1122 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1123 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1124 | MODULE_LICENSE("GPL"); |