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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
16725b9d | 2 | |
3d14c5d2 | 3 | #include <linux/ceph/ceph_debug.h> |
16725b9d SW |
4 | |
5 | #include <linux/backing-dev.h> | |
c309f0ab | 6 | #include <linux/ctype.h> |
16725b9d SW |
7 | #include <linux/fs.h> |
8 | #include <linux/inet.h> | |
9 | #include <linux/in6.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/mount.h> | |
12 | #include <linux/parser.h> | |
16725b9d SW |
13 | #include <linux/sched.h> |
14 | #include <linux/seq_file.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
16725b9d SW |
16 | #include <linux/statfs.h> |
17 | #include <linux/string.h> | |
16725b9d | 18 | |
16725b9d | 19 | #include "super.h" |
3d14c5d2 | 20 | #include "mds_client.h" |
99ccbd22 | 21 | #include "cache.h" |
3d14c5d2 | 22 | |
1fe60e51 | 23 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
24 | #include <linux/ceph/decode.h> |
25 | #include <linux/ceph/mon_client.h> | |
26 | #include <linux/ceph/auth.h> | |
27 | #include <linux/ceph/debugfs.h> | |
16725b9d SW |
28 | |
29 | /* | |
30 | * Ceph superblock operations | |
31 | * | |
32 | * Handle the basics of mounting, unmounting. | |
33 | */ | |
34 | ||
16725b9d SW |
35 | /* |
36 | * super ops | |
37 | */ | |
38 | static void ceph_put_super(struct super_block *s) | |
39 | { | |
3d14c5d2 | 40 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d SW |
41 | |
42 | dout("put_super\n"); | |
3d14c5d2 | 43 | ceph_mdsc_close_sessions(fsc->mdsc); |
16725b9d SW |
44 | } |
45 | ||
46 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
47 | { | |
2b0143b5 | 48 | struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry)); |
73fb0949 | 49 | struct ceph_mon_client *monc = &fsc->client->monc; |
16725b9d SW |
50 | struct ceph_statfs st; |
51 | u64 fsid; | |
52 | int err; | |
06d74376 DF |
53 | u64 data_pool; |
54 | ||
55 | if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) { | |
56 | data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0]; | |
57 | } else { | |
58 | data_pool = CEPH_NOPOOL; | |
59 | } | |
16725b9d SW |
60 | |
61 | dout("statfs\n"); | |
73fb0949 | 62 | err = ceph_monc_do_statfs(monc, data_pool, &st); |
16725b9d SW |
63 | if (err < 0) |
64 | return err; | |
65 | ||
66 | /* fill in kstatfs */ | |
67 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
68 | ||
69 | /* | |
70 | * express utilization in terms of large blocks to avoid | |
71 | * overflow on 32-bit machines. | |
92a49fb0 SW |
72 | * |
73 | * NOTE: for the time being, we make bsize == frsize to humor | |
74 | * not-yet-ancient versions of glibc that are broken. | |
75 | * Someday, we will probably want to report a real block | |
76 | * size... whatever that may mean for a network file system! | |
16725b9d SW |
77 | */ |
78 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
92a49fb0 | 79 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
9122eed5 LH |
80 | |
81 | /* | |
82 | * By default use root quota for stats; fallback to overall filesystem | |
83 | * usage if using 'noquotadf' mount option or if the root dir doesn't | |
84 | * have max_bytes quota set. | |
85 | */ | |
86 | if (ceph_test_mount_opt(fsc, NOQUOTADF) || | |
87 | !ceph_quota_update_statfs(fsc, buf)) { | |
88 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
89 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
90 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
91 | } | |
16725b9d SW |
92 | |
93 | buf->f_files = le64_to_cpu(st.num_objects); | |
94 | buf->f_ffree = -1; | |
558d3499 | 95 | buf->f_namelen = NAME_MAX; |
16725b9d | 96 | |
080a330e | 97 | /* Must convert the fsid, for consistent values across arches */ |
73fb0949 LH |
98 | mutex_lock(&monc->mutex); |
99 | fsid = le64_to_cpu(*(__le64 *)(&monc->monmap->fsid)) ^ | |
100 | le64_to_cpu(*((__le64 *)&monc->monmap->fsid + 1)); | |
101 | mutex_unlock(&monc->mutex); | |
102 | ||
16725b9d SW |
103 | buf->f_fsid.val[0] = fsid & 0xffffffff; |
104 | buf->f_fsid.val[1] = fsid >> 32; | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | ||
2d9c98ae | 110 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 111 | { |
3d14c5d2 | 112 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
113 | |
114 | if (!wait) { | |
115 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 116 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
117 | dout("sync_fs (non-blocking) done\n"); |
118 | return 0; | |
119 | } | |
120 | ||
121 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
122 | ceph_osdc_sync(&fsc->client->osdc); |
123 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 124 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
125 | return 0; |
126 | } | |
127 | ||
16725b9d SW |
128 | /* |
129 | * mount options | |
130 | */ | |
131 | enum { | |
16725b9d SW |
132 | Opt_wsize, |
133 | Opt_rsize, | |
83817e35 | 134 | Opt_rasize, |
16725b9d SW |
135 | Opt_caps_wanted_delay_min, |
136 | Opt_caps_wanted_delay_max, | |
fe33032d | 137 | Opt_caps_max, |
16725b9d | 138 | Opt_readdir_max_entries, |
23804d91 | 139 | Opt_readdir_max_bytes, |
2baba250 | 140 | Opt_congestion_kb, |
e53c2fe0 | 141 | Opt_last_int, |
16725b9d SW |
142 | /* int args above */ |
143 | Opt_snapdirname, | |
430afbad | 144 | Opt_mds_namespace, |
1d8f8360 | 145 | Opt_fscache_uniq, |
131d7eb4 | 146 | Opt_recover_session, |
e53c2fe0 | 147 | Opt_last_string, |
16725b9d | 148 | /* string args above */ |
16725b9d SW |
149 | Opt_dirstat, |
150 | Opt_nodirstat, | |
151 | Opt_rbytes, | |
152 | Opt_norbytes, | |
cffaba15 | 153 | Opt_asyncreaddir, |
16725b9d | 154 | Opt_noasyncreaddir, |
a40dc6cc SW |
155 | Opt_dcache, |
156 | Opt_nodcache, | |
ad1fee96 | 157 | Opt_ino32, |
cffaba15 | 158 | Opt_noino32, |
99ccbd22 | 159 | Opt_fscache, |
45195e42 | 160 | Opt_nofscache, |
10183a69 YZ |
161 | Opt_poolperm, |
162 | Opt_nopoolperm, | |
e9e427f0 YZ |
163 | Opt_require_active_mds, |
164 | Opt_norequire_active_mds, | |
45195e42 SW |
165 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
166 | Opt_acl, | |
167 | #endif | |
10183a69 | 168 | Opt_noacl, |
9122eed5 LH |
169 | Opt_quotadf, |
170 | Opt_noquotadf, | |
ea4cdc54 LH |
171 | Opt_copyfrom, |
172 | Opt_nocopyfrom, | |
16725b9d SW |
173 | }; |
174 | ||
3d14c5d2 | 175 | static match_table_t fsopt_tokens = { |
16725b9d SW |
176 | {Opt_wsize, "wsize=%d"}, |
177 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 178 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
179 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
180 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
fe33032d | 181 | {Opt_caps_max, "caps_max=%d"}, |
16725b9d | 182 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 183 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 184 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
185 | /* int args above */ |
186 | {Opt_snapdirname, "snapdirname=%s"}, | |
430afbad | 187 | {Opt_mds_namespace, "mds_namespace=%s"}, |
131d7eb4 | 188 | {Opt_recover_session, "recover_session=%s"}, |
1d8f8360 | 189 | {Opt_fscache_uniq, "fsc=%s"}, |
16725b9d | 190 | /* string args above */ |
16725b9d SW |
191 | {Opt_dirstat, "dirstat"}, |
192 | {Opt_nodirstat, "nodirstat"}, | |
193 | {Opt_rbytes, "rbytes"}, | |
194 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 195 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 196 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
197 | {Opt_dcache, "dcache"}, |
198 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 199 | {Opt_ino32, "ino32"}, |
cffaba15 | 200 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
201 | {Opt_fscache, "fsc"}, |
202 | {Opt_nofscache, "nofsc"}, | |
10183a69 YZ |
203 | {Opt_poolperm, "poolperm"}, |
204 | {Opt_nopoolperm, "nopoolperm"}, | |
e9e427f0 YZ |
205 | {Opt_require_active_mds, "require_active_mds"}, |
206 | {Opt_norequire_active_mds, "norequire_active_mds"}, | |
45195e42 SW |
207 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
208 | {Opt_acl, "acl"}, | |
209 | #endif | |
210 | {Opt_noacl, "noacl"}, | |
9122eed5 LH |
211 | {Opt_quotadf, "quotadf"}, |
212 | {Opt_noquotadf, "noquotadf"}, | |
ea4cdc54 LH |
213 | {Opt_copyfrom, "copyfrom"}, |
214 | {Opt_nocopyfrom, "nocopyfrom"}, | |
16725b9d SW |
215 | {-1, NULL} |
216 | }; | |
217 | ||
3d14c5d2 | 218 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 219 | { |
3d14c5d2 YS |
220 | struct ceph_mount_options *fsopt = private; |
221 | substring_t argstr[MAX_OPT_ARGS]; | |
222 | int token, intval, ret; | |
223 | ||
224 | token = match_token((char *)c, fsopt_tokens, argstr); | |
225 | if (token < 0) | |
226 | return -EINVAL; | |
227 | ||
228 | if (token < Opt_last_int) { | |
229 | ret = match_int(&argstr[0], &intval); | |
230 | if (ret < 0) { | |
2f56b6ba | 231 | pr_err("bad option arg (not int) at '%s'\n", c); |
3d14c5d2 | 232 | return ret; |
c309f0ab | 233 | } |
3d14c5d2 YS |
234 | dout("got int token %d val %d\n", token, intval); |
235 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
236 | dout("got string token %d val %s\n", token, | |
237 | argstr[0].from); | |
238 | } else { | |
239 | dout("got token %d\n", token); | |
c309f0ab SW |
240 | } |
241 | ||
3d14c5d2 YS |
242 | switch (token) { |
243 | case Opt_snapdirname: | |
244 | kfree(fsopt->snapdir_name); | |
245 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
246 | argstr[0].to-argstr[0].from, | |
247 | GFP_KERNEL); | |
248 | if (!fsopt->snapdir_name) | |
249 | return -ENOMEM; | |
250 | break; | |
235a0982 | 251 | case Opt_mds_namespace: |
937441f3 | 252 | kfree(fsopt->mds_namespace); |
430afbad YZ |
253 | fsopt->mds_namespace = kstrndup(argstr[0].from, |
254 | argstr[0].to-argstr[0].from, | |
255 | GFP_KERNEL); | |
256 | if (!fsopt->mds_namespace) | |
257 | return -ENOMEM; | |
235a0982 | 258 | break; |
131d7eb4 YZ |
259 | case Opt_recover_session: |
260 | if (!strncmp(argstr[0].from, "no", | |
261 | argstr[0].to - argstr[0].from)) { | |
262 | fsopt->flags &= ~CEPH_MOUNT_OPT_CLEANRECOVER; | |
263 | } else if (!strncmp(argstr[0].from, "clean", | |
264 | argstr[0].to - argstr[0].from)) { | |
265 | fsopt->flags |= CEPH_MOUNT_OPT_CLEANRECOVER; | |
266 | } else { | |
267 | return -EINVAL; | |
268 | } | |
269 | break; | |
1d8f8360 | 270 | case Opt_fscache_uniq: |
937441f3 | 271 | kfree(fsopt->fscache_uniq); |
1d8f8360 YZ |
272 | fsopt->fscache_uniq = kstrndup(argstr[0].from, |
273 | argstr[0].to-argstr[0].from, | |
274 | GFP_KERNEL); | |
275 | if (!fsopt->fscache_uniq) | |
276 | return -ENOMEM; | |
277 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
278 | break; | |
430afbad | 279 | /* misc */ |
3d14c5d2 | 280 | case Opt_wsize: |
8db0c759 | 281 | if (intval < (int)PAGE_SIZE || intval > CEPH_MAX_WRITE_SIZE) |
95cca2b4 YZ |
282 | return -EINVAL; |
283 | fsopt->wsize = ALIGN(intval, PAGE_SIZE); | |
3d14c5d2 YS |
284 | break; |
285 | case Opt_rsize: | |
8db0c759 | 286 | if (intval < (int)PAGE_SIZE || intval > CEPH_MAX_READ_SIZE) |
aa187926 YZ |
287 | return -EINVAL; |
288 | fsopt->rsize = ALIGN(intval, PAGE_SIZE); | |
3d14c5d2 | 289 | break; |
83817e35 | 290 | case Opt_rasize: |
4214fb15 YZ |
291 | if (intval < 0) |
292 | return -EINVAL; | |
c36ed50d | 293 | fsopt->rasize = ALIGN(intval, PAGE_SIZE); |
83817e35 | 294 | break; |
3d14c5d2 | 295 | case Opt_caps_wanted_delay_min: |
4214fb15 YZ |
296 | if (intval < 1) |
297 | return -EINVAL; | |
3d14c5d2 YS |
298 | fsopt->caps_wanted_delay_min = intval; |
299 | break; | |
300 | case Opt_caps_wanted_delay_max: | |
4214fb15 YZ |
301 | if (intval < 1) |
302 | return -EINVAL; | |
3d14c5d2 YS |
303 | fsopt->caps_wanted_delay_max = intval; |
304 | break; | |
fe33032d YZ |
305 | case Opt_caps_max: |
306 | if (intval < 0) | |
307 | return -EINVAL; | |
308 | fsopt->caps_max = intval; | |
309 | break; | |
3d14c5d2 | 310 | case Opt_readdir_max_entries: |
4214fb15 YZ |
311 | if (intval < 1) |
312 | return -EINVAL; | |
3d14c5d2 YS |
313 | fsopt->max_readdir = intval; |
314 | break; | |
315 | case Opt_readdir_max_bytes: | |
8db0c759 | 316 | if (intval < (int)PAGE_SIZE && intval != 0) |
4214fb15 | 317 | return -EINVAL; |
3d14c5d2 YS |
318 | fsopt->max_readdir_bytes = intval; |
319 | break; | |
320 | case Opt_congestion_kb: | |
4214fb15 YZ |
321 | if (intval < 1024) /* at least 1M */ |
322 | return -EINVAL; | |
3d14c5d2 YS |
323 | fsopt->congestion_kb = intval; |
324 | break; | |
325 | case Opt_dirstat: | |
326 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
327 | break; | |
328 | case Opt_nodirstat: | |
329 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
330 | break; | |
331 | case Opt_rbytes: | |
332 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
333 | break; | |
334 | case Opt_norbytes: | |
335 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
336 | break; | |
cffaba15 AE |
337 | case Opt_asyncreaddir: |
338 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
339 | break; | |
3d14c5d2 YS |
340 | case Opt_noasyncreaddir: |
341 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
342 | break; | |
a40dc6cc SW |
343 | case Opt_dcache: |
344 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
345 | break; | |
346 | case Opt_nodcache: | |
347 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
348 | break; | |
ad1fee96 YS |
349 | case Opt_ino32: |
350 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
351 | break; | |
cffaba15 AE |
352 | case Opt_noino32: |
353 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
354 | break; | |
99ccbd22 MT |
355 | case Opt_fscache: |
356 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
7ae7a828 CX |
357 | kfree(fsopt->fscache_uniq); |
358 | fsopt->fscache_uniq = NULL; | |
99ccbd22 MT |
359 | break; |
360 | case Opt_nofscache: | |
361 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
7ae7a828 CX |
362 | kfree(fsopt->fscache_uniq); |
363 | fsopt->fscache_uniq = NULL; | |
99ccbd22 | 364 | break; |
10183a69 YZ |
365 | case Opt_poolperm: |
366 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; | |
10183a69 YZ |
367 | break; |
368 | case Opt_nopoolperm: | |
369 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; | |
370 | break; | |
e9e427f0 YZ |
371 | case Opt_require_active_mds: |
372 | fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT; | |
373 | break; | |
374 | case Opt_norequire_active_mds: | |
375 | fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT; | |
376 | break; | |
9122eed5 LH |
377 | case Opt_quotadf: |
378 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF; | |
379 | break; | |
380 | case Opt_noquotadf: | |
381 | fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF; | |
382 | break; | |
ea4cdc54 LH |
383 | case Opt_copyfrom: |
384 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM; | |
385 | break; | |
386 | case Opt_nocopyfrom: | |
387 | fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM; | |
388 | break; | |
45195e42 SW |
389 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
390 | case Opt_acl: | |
1751e8a6 | 391 | fsopt->sb_flags |= SB_POSIXACL; |
45195e42 SW |
392 | break; |
393 | #endif | |
394 | case Opt_noacl: | |
1751e8a6 | 395 | fsopt->sb_flags &= ~SB_POSIXACL; |
45195e42 | 396 | break; |
3d14c5d2 YS |
397 | default: |
398 | BUG_ON(token); | |
399 | } | |
400 | return 0; | |
c309f0ab | 401 | } |
16725b9d | 402 | |
3d14c5d2 | 403 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 404 | { |
3d14c5d2 YS |
405 | dout("destroy_mount_options %p\n", args); |
406 | kfree(args->snapdir_name); | |
430afbad | 407 | kfree(args->mds_namespace); |
3f384954 | 408 | kfree(args->server_path); |
1d8f8360 | 409 | kfree(args->fscache_uniq); |
3d14c5d2 YS |
410 | kfree(args); |
411 | } | |
16725b9d | 412 | |
3d14c5d2 YS |
413 | static int strcmp_null(const char *s1, const char *s2) |
414 | { | |
415 | if (!s1 && !s2) | |
416 | return 0; | |
417 | if (s1 && !s2) | |
418 | return -1; | |
419 | if (!s1 && s2) | |
420 | return 1; | |
421 | return strcmp(s1, s2); | |
422 | } | |
16725b9d | 423 | |
3d14c5d2 YS |
424 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
425 | struct ceph_options *new_opt, | |
426 | struct ceph_fs_client *fsc) | |
427 | { | |
428 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
429 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
430 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
431 | int ret; | |
16725b9d | 432 | |
3d14c5d2 YS |
433 | ret = memcmp(fsopt1, fsopt2, ofs); |
434 | if (ret) | |
435 | return ret; | |
436 | ||
437 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
430afbad YZ |
438 | if (ret) |
439 | return ret; | |
440 | ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); | |
3d14c5d2 YS |
441 | if (ret) |
442 | return ret; | |
3f384954 | 443 | ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); |
1d8f8360 YZ |
444 | if (ret) |
445 | return ret; | |
446 | ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq); | |
3f384954 YZ |
447 | if (ret) |
448 | return ret; | |
449 | ||
3d14c5d2 YS |
450 | return ceph_compare_options(new_opt, fsc->client); |
451 | } | |
452 | ||
453 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
454 | struct ceph_options **popt, | |
455 | int flags, char *options, | |
3f384954 | 456 | const char *dev_name) |
3d14c5d2 YS |
457 | { |
458 | struct ceph_mount_options *fsopt; | |
459 | const char *dev_name_end; | |
c98f533c AE |
460 | int err; |
461 | ||
462 | if (!dev_name || !*dev_name) | |
463 | return -EINVAL; | |
3d14c5d2 YS |
464 | |
465 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
466 | if (!fsopt) | |
467 | return -ENOMEM; | |
468 | ||
469 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
470 | ||
80db8bea NW |
471 | fsopt->sb_flags = flags; |
472 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 473 | |
95cca2b4 | 474 | fsopt->wsize = CEPH_MAX_WRITE_SIZE; |
aa187926 | 475 | fsopt->rsize = CEPH_MAX_READ_SIZE; |
80db8bea NW |
476 | fsopt->rasize = CEPH_RASIZE_DEFAULT; |
477 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
a149bb9a SK |
478 | if (!fsopt->snapdir_name) { |
479 | err = -ENOMEM; | |
480 | goto out; | |
481 | } | |
482 | ||
50aac4fe SW |
483 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
484 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
485 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; |
486 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
487 | fsopt->congestion_kb = default_congestion_kb(); | |
488 | ||
c98f533c AE |
489 | /* |
490 | * Distinguish the server list from the path in "dev_name". | |
491 | * Internally we do not include the leading '/' in the path. | |
492 | * | |
493 | * "dev_name" will look like: | |
494 | * <server_spec>[,<server_spec>...]:[<path>] | |
495 | * where | |
496 | * <server_spec> is <ip>[:<port>] | |
497 | * <path> is optional, but if present must begin with '/' | |
498 | */ | |
499 | dev_name_end = strchr(dev_name, '/'); | |
500 | if (dev_name_end) { | |
ce2728aa YZ |
501 | if (strlen(dev_name_end) > 1) { |
502 | fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); | |
503 | if (!fsopt->server_path) { | |
504 | err = -ENOMEM; | |
505 | goto out; | |
506 | } | |
3f384954 | 507 | } |
c98f533c | 508 | } else { |
c98f533c | 509 | dev_name_end = dev_name + strlen(dev_name); |
c98f533c | 510 | } |
80db8bea | 511 | err = -EINVAL; |
c98f533c | 512 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 513 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 514 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
515 | dev_name); |
516 | goto out; | |
517 | } | |
3d14c5d2 | 518 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
3f384954 YZ |
519 | if (fsopt->server_path) |
520 | dout("server path '%s'\n", fsopt->server_path); | |
16725b9d | 521 | |
ee57741c | 522 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 523 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
524 | if (IS_ERR(*popt)) { |
525 | err = PTR_ERR(*popt); | |
3d14c5d2 | 526 | goto out; |
ee57741c | 527 | } |
3d14c5d2 YS |
528 | |
529 | /* success */ | |
530 | *pfsopt = fsopt; | |
531 | return 0; | |
16725b9d | 532 | |
7b813c46 | 533 | out: |
3d14c5d2 YS |
534 | destroy_mount_options(fsopt); |
535 | return err; | |
16725b9d SW |
536 | } |
537 | ||
3d14c5d2 YS |
538 | /** |
539 | * ceph_show_options - Show mount options in /proc/mounts | |
540 | * @m: seq_file to write to | |
34c80b1d | 541 | * @root: root of that (sub)tree |
3d14c5d2 | 542 | */ |
34c80b1d | 543 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 544 | { |
34c80b1d | 545 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 | 546 | struct ceph_mount_options *fsopt = fsc->mount_options; |
ff40f9ae ID |
547 | size_t pos; |
548 | int ret; | |
549 | ||
550 | /* a comma between MNT/MS and client options */ | |
551 | seq_putc(m, ','); | |
552 | pos = m->count; | |
553 | ||
02b2f549 | 554 | ret = ceph_print_client_options(m, fsc->client, false); |
ff40f9ae ID |
555 | if (ret) |
556 | return ret; | |
557 | ||
558 | /* retract our comma if no client options */ | |
559 | if (m->count == pos) | |
560 | m->count--; | |
3d14c5d2 YS |
561 | |
562 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
563 | seq_puts(m, ",dirstat"); | |
133e9156 YZ |
564 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
565 | seq_puts(m, ",rbytes"); | |
3d14c5d2 YS |
566 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
567 | seq_puts(m, ",noasyncreaddir"); | |
ff7eeb82 | 568 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
a40dc6cc | 569 | seq_puts(m, ",nodcache"); |
3619aa8b CX |
570 | if (fsopt->flags & CEPH_MOUNT_OPT_INO32) |
571 | seq_puts(m, ",ino32"); | |
1d8f8360 | 572 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) { |
4d8969af | 573 | seq_show_option(m, "fsc", fsopt->fscache_uniq); |
1d8f8360 | 574 | } |
10183a69 YZ |
575 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
576 | seq_puts(m, ",nopoolperm"); | |
9122eed5 LH |
577 | if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF) |
578 | seq_puts(m, ",noquotadf"); | |
3d14c5d2 | 579 | |
45195e42 | 580 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
1751e8a6 | 581 | if (fsopt->sb_flags & SB_POSIXACL) |
45195e42 SW |
582 | seq_puts(m, ",acl"); |
583 | else | |
584 | seq_puts(m, ",noacl"); | |
585 | #endif | |
586 | ||
6f9718fe LH |
587 | if ((fsopt->flags & CEPH_MOUNT_OPT_NOCOPYFROM) == 0) |
588 | seq_puts(m, ",copyfrom"); | |
ea4cdc54 | 589 | |
430afbad | 590 | if (fsopt->mds_namespace) |
4d8969af | 591 | seq_show_option(m, "mds_namespace", fsopt->mds_namespace); |
131d7eb4 YZ |
592 | |
593 | if (fsopt->flags & CEPH_MOUNT_OPT_CLEANRECOVER) | |
594 | seq_show_option(m, "recover_session", "clean"); | |
595 | ||
6dd4940b | 596 | if (fsopt->wsize != CEPH_MAX_WRITE_SIZE) |
3d14c5d2 | 597 | seq_printf(m, ",wsize=%d", fsopt->wsize); |
aa187926 | 598 | if (fsopt->rsize != CEPH_MAX_READ_SIZE) |
3d14c5d2 | 599 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 600 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 601 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
602 | if (fsopt->congestion_kb != default_congestion_kb()) |
603 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
fe33032d YZ |
604 | if (fsopt->caps_max) |
605 | seq_printf(m, ",caps_max=%d", fsopt->caps_max); | |
3d14c5d2 YS |
606 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) |
607 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
608 | fsopt->caps_wanted_delay_min); | |
609 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
610 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
611 | fsopt->caps_wanted_delay_max); | |
3d14c5d2 YS |
612 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
613 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
614 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
615 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
616 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
a068acf2 | 617 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
ff40f9ae | 618 | |
3d14c5d2 | 619 | return 0; |
16725b9d SW |
620 | } |
621 | ||
622 | /* | |
3d14c5d2 YS |
623 | * handle any mon messages the standard library doesn't understand. |
624 | * return error if we don't either. | |
16725b9d | 625 | */ |
3d14c5d2 | 626 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 627 | { |
3d14c5d2 YS |
628 | struct ceph_fs_client *fsc = client->private; |
629 | int type = le16_to_cpu(msg->hdr.type); | |
630 | ||
631 | switch (type) { | |
632 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
633 | ceph_mdsc_handle_mdsmap(fsc->mdsc, msg); |
634 | return 0; | |
635 | case CEPH_MSG_FS_MAP_USER: | |
636 | ceph_mdsc_handle_fsmap(fsc->mdsc, msg); | |
3d14c5d2 | 637 | return 0; |
3d14c5d2 YS |
638 | default: |
639 | return -1; | |
640 | } | |
641 | } | |
642 | ||
643 | /* | |
644 | * create a new fs client | |
8aaff151 ID |
645 | * |
646 | * Success or not, this function consumes @fsopt and @opt. | |
3d14c5d2 | 647 | */ |
0c6d4b4e | 648 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
649 | struct ceph_options *opt) |
650 | { | |
651 | struct ceph_fs_client *fsc; | |
3bf53337 AE |
652 | int page_count; |
653 | size_t size; | |
8aaff151 | 654 | int err; |
16725b9d | 655 | |
3d14c5d2 | 656 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
8aaff151 ID |
657 | if (!fsc) { |
658 | err = -ENOMEM; | |
659 | goto fail; | |
660 | } | |
16725b9d | 661 | |
74da4a0f | 662 | fsc->client = ceph_create_client(opt, fsc); |
3d14c5d2 YS |
663 | if (IS_ERR(fsc->client)) { |
664 | err = PTR_ERR(fsc->client); | |
665 | goto fail; | |
666 | } | |
8aaff151 | 667 | opt = NULL; /* fsc->client now owns this */ |
c843d13c | 668 | |
3d14c5d2 | 669 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; |
02b2f549 | 670 | ceph_set_opt(fsc->client, ABORT_ON_FULL); |
430afbad | 671 | |
d37b1d99 | 672 | if (!fsopt->mds_namespace) { |
430afbad YZ |
673 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, |
674 | 0, true); | |
675 | } else { | |
676 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP, | |
677 | 0, false); | |
678 | } | |
16725b9d | 679 | |
3d14c5d2 | 680 | fsc->mount_options = fsopt; |
16725b9d | 681 | |
3d14c5d2 YS |
682 | fsc->sb = NULL; |
683 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
81f148a9 | 684 | fsc->filp_gen = 1; |
16725b9d | 685 | |
3d14c5d2 | 686 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d SW |
687 | |
688 | err = -ENOMEM; | |
01e6acc4 TH |
689 | /* |
690 | * The number of concurrent works can be high but they don't need | |
691 | * to be processed in parallel, limit concurrency. | |
692 | */ | |
1cf89a8d YZ |
693 | fsc->inode_wq = alloc_workqueue("ceph-inode", WQ_UNBOUND, 0); |
694 | if (!fsc->inode_wq) | |
09dc9fc2 | 695 | goto fail_client; |
e3ec8d68 YZ |
696 | fsc->cap_wq = alloc_workqueue("ceph-cap", 0, 1); |
697 | if (!fsc->cap_wq) | |
1cf89a8d | 698 | goto fail_inode_wq; |
16725b9d | 699 | |
b9bfb93c SW |
700 | /* set up mempools */ |
701 | err = -ENOMEM; | |
09cbfeaf | 702 | page_count = fsc->mount_options->wsize >> PAGE_SHIFT; |
3bf53337 AE |
703 | size = sizeof (struct page *) * (page_count ? page_count : 1); |
704 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 705 | if (!fsc->wb_pagevec_pool) |
e3ec8d68 | 706 | goto fail_cap_wq; |
b9bfb93c | 707 | |
3d14c5d2 | 708 | return fsc; |
b9bfb93c | 709 | |
e3ec8d68 YZ |
710 | fail_cap_wq: |
711 | destroy_workqueue(fsc->cap_wq); | |
1cf89a8d YZ |
712 | fail_inode_wq: |
713 | destroy_workqueue(fsc->inode_wq); | |
3d14c5d2 YS |
714 | fail_client: |
715 | ceph_destroy_client(fsc->client); | |
16725b9d | 716 | fail: |
3d14c5d2 | 717 | kfree(fsc); |
8aaff151 ID |
718 | if (opt) |
719 | ceph_destroy_options(opt); | |
720 | destroy_mount_options(fsopt); | |
16725b9d SW |
721 | return ERR_PTR(err); |
722 | } | |
723 | ||
a57d9064 YZ |
724 | static void flush_fs_workqueues(struct ceph_fs_client *fsc) |
725 | { | |
1cf89a8d | 726 | flush_workqueue(fsc->inode_wq); |
e3ec8d68 | 727 | flush_workqueue(fsc->cap_wq); |
a57d9064 YZ |
728 | } |
729 | ||
0c6d4b4e | 730 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 731 | { |
3d14c5d2 | 732 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 733 | |
3ee5a701 | 734 | ceph_mdsc_destroy(fsc); |
1cf89a8d | 735 | destroy_workqueue(fsc->inode_wq); |
e3ec8d68 | 736 | destroy_workqueue(fsc->cap_wq); |
16725b9d | 737 | |
3d14c5d2 | 738 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 739 | |
3d14c5d2 | 740 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 741 | |
3d14c5d2 | 742 | ceph_destroy_client(fsc->client); |
16725b9d | 743 | |
3d14c5d2 YS |
744 | kfree(fsc); |
745 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
746 | } |
747 | ||
0743304d | 748 | /* |
3d14c5d2 | 749 | * caches |
0743304d | 750 | */ |
3d14c5d2 YS |
751 | struct kmem_cache *ceph_inode_cachep; |
752 | struct kmem_cache *ceph_cap_cachep; | |
f66fd9f0 | 753 | struct kmem_cache *ceph_cap_flush_cachep; |
3d14c5d2 YS |
754 | struct kmem_cache *ceph_dentry_cachep; |
755 | struct kmem_cache *ceph_file_cachep; | |
bb48bd4d | 756 | struct kmem_cache *ceph_dir_file_cachep; |
3d14c5d2 YS |
757 | |
758 | static void ceph_inode_init_once(void *foo) | |
0743304d | 759 | { |
3d14c5d2 YS |
760 | struct ceph_inode_info *ci = foo; |
761 | inode_init_once(&ci->vfs_inode); | |
762 | } | |
763 | ||
764 | static int __init init_caches(void) | |
765 | { | |
99ccbd22 MT |
766 | int error = -ENOMEM; |
767 | ||
3d14c5d2 YS |
768 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
769 | sizeof(struct ceph_inode_info), | |
770 | __alignof__(struct ceph_inode_info), | |
5d097056 VD |
771 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
772 | SLAB_ACCOUNT, ceph_inode_init_once); | |
d37b1d99 | 773 | if (!ceph_inode_cachep) |
3d14c5d2 YS |
774 | return -ENOMEM; |
775 | ||
bc4b5ad3 | 776 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD); |
d37b1d99 | 777 | if (!ceph_cap_cachep) |
3d14c5d2 | 778 | goto bad_cap; |
f66fd9f0 YZ |
779 | ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, |
780 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
d37b1d99 | 781 | if (!ceph_cap_flush_cachep) |
f66fd9f0 | 782 | goto bad_cap_flush; |
3d14c5d2 YS |
783 | |
784 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
785 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
d37b1d99 | 786 | if (!ceph_dentry_cachep) |
3d14c5d2 YS |
787 | goto bad_dentry; |
788 | ||
6b1a9a6c | 789 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD); |
d37b1d99 | 790 | if (!ceph_file_cachep) |
3d14c5d2 YS |
791 | goto bad_file; |
792 | ||
bb48bd4d CX |
793 | ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD); |
794 | if (!ceph_dir_file_cachep) | |
795 | goto bad_dir_file; | |
796 | ||
1c789249 CX |
797 | error = ceph_fscache_register(); |
798 | if (error) | |
799 | goto bad_fscache; | |
3d14c5d2 | 800 | |
99ccbd22 | 801 | return 0; |
1c789249 CX |
802 | |
803 | bad_fscache: | |
bb48bd4d CX |
804 | kmem_cache_destroy(ceph_dir_file_cachep); |
805 | bad_dir_file: | |
1c789249 | 806 | kmem_cache_destroy(ceph_file_cachep); |
3d14c5d2 YS |
807 | bad_file: |
808 | kmem_cache_destroy(ceph_dentry_cachep); | |
809 | bad_dentry: | |
f66fd9f0 YZ |
810 | kmem_cache_destroy(ceph_cap_flush_cachep); |
811 | bad_cap_flush: | |
3d14c5d2 YS |
812 | kmem_cache_destroy(ceph_cap_cachep); |
813 | bad_cap: | |
814 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 815 | return error; |
0743304d SW |
816 | } |
817 | ||
3d14c5d2 YS |
818 | static void destroy_caches(void) |
819 | { | |
8c0a8537 KS |
820 | /* |
821 | * Make sure all delayed rcu free inodes are flushed before we | |
822 | * destroy cache. | |
823 | */ | |
824 | rcu_barrier(); | |
99ccbd22 | 825 | |
3d14c5d2 YS |
826 | kmem_cache_destroy(ceph_inode_cachep); |
827 | kmem_cache_destroy(ceph_cap_cachep); | |
f66fd9f0 | 828 | kmem_cache_destroy(ceph_cap_flush_cachep); |
3d14c5d2 YS |
829 | kmem_cache_destroy(ceph_dentry_cachep); |
830 | kmem_cache_destroy(ceph_file_cachep); | |
bb48bd4d | 831 | kmem_cache_destroy(ceph_dir_file_cachep); |
99ccbd22 MT |
832 | |
833 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
834 | } |
835 | ||
836 | ||
16725b9d | 837 | /* |
3d14c5d2 YS |
838 | * ceph_umount_begin - initiate forced umount. Tear down down the |
839 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 840 | */ |
3d14c5d2 | 841 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 842 | { |
3d14c5d2 YS |
843 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
844 | ||
845 | dout("ceph_umount_begin - starting forced umount\n"); | |
846 | if (!fsc) | |
847 | return; | |
848 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
12b69d5f | 849 | ceph_osdc_abort_requests(&fsc->client->osdc, -EIO); |
48fec5d0 | 850 | ceph_mdsc_force_umount(fsc->mdsc); |
81f148a9 | 851 | fsc->filp_gen++; // invalidate open files |
16725b9d SW |
852 | } |
853 | ||
00abf69d JL |
854 | static int ceph_remount(struct super_block *sb, int *flags, char *data) |
855 | { | |
856 | sync_filesystem(sb); | |
857 | return 0; | |
858 | } | |
859 | ||
3d14c5d2 YS |
860 | static const struct super_operations ceph_super_ops = { |
861 | .alloc_inode = ceph_alloc_inode, | |
cfa6d412 | 862 | .free_inode = ceph_free_inode, |
3d14c5d2 | 863 | .write_inode = ceph_write_inode, |
52dd0f1b | 864 | .drop_inode = generic_delete_inode, |
87bc5b89 | 865 | .evict_inode = ceph_evict_inode, |
3d14c5d2 YS |
866 | .sync_fs = ceph_sync_fs, |
867 | .put_super = ceph_put_super, | |
00abf69d | 868 | .remount_fs = ceph_remount, |
3d14c5d2 YS |
869 | .show_options = ceph_show_options, |
870 | .statfs = ceph_statfs, | |
871 | .umount_begin = ceph_umount_begin, | |
872 | }; | |
873 | ||
16725b9d SW |
874 | /* |
875 | * Bootstrap mount by opening the root directory. Note the mount | |
876 | * @started time from caller, and time out if this takes too long. | |
877 | */ | |
3d14c5d2 | 878 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
879 | const char *path, |
880 | unsigned long started) | |
881 | { | |
3d14c5d2 | 882 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
883 | struct ceph_mds_request *req = NULL; |
884 | int err; | |
885 | struct dentry *root; | |
886 | ||
887 | /* open dir */ | |
888 | dout("open_root_inode opening '%s'\n", path); | |
889 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
890 | if (IS_ERR(req)) | |
7e34bc52 | 891 | return ERR_CAST(req); |
16725b9d | 892 | req->r_path1 = kstrdup(path, GFP_NOFS); |
a149bb9a SK |
893 | if (!req->r_path1) { |
894 | root = ERR_PTR(-ENOMEM); | |
895 | goto out; | |
896 | } | |
897 | ||
16725b9d SW |
898 | req->r_ino1.ino = CEPH_INO_ROOT; |
899 | req->r_ino1.snap = CEPH_NOSNAP; | |
900 | req->r_started = started; | |
a319bf56 | 901 | req->r_timeout = fsc->client->options->mount_timeout; |
16725b9d SW |
902 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
903 | req->r_num_caps = 2; | |
904 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
905 | if (err == 0) { | |
3c5184ef AV |
906 | struct inode *inode = req->r_target_inode; |
907 | req->r_target_inode = NULL; | |
16725b9d | 908 | dout("open_root_inode success\n"); |
ce2728aa YZ |
909 | root = d_make_root(inode); |
910 | if (!root) { | |
911 | root = ERR_PTR(-ENOMEM); | |
912 | goto out; | |
774ac21d | 913 | } |
16725b9d SW |
914 | dout("open_root_inode success, root dentry is %p\n", root); |
915 | } else { | |
916 | root = ERR_PTR(err); | |
917 | } | |
3c5184ef | 918 | out: |
16725b9d SW |
919 | ceph_mdsc_put_request(req); |
920 | return root; | |
921 | } | |
922 | ||
3d14c5d2 YS |
923 | |
924 | ||
925 | ||
16725b9d SW |
926 | /* |
927 | * mount: join the ceph cluster, and open root directory. | |
928 | */ | |
3f384954 | 929 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc) |
16725b9d | 930 | { |
16725b9d | 931 | int err; |
16725b9d SW |
932 | unsigned long started = jiffies; /* note the start time */ |
933 | struct dentry *root; | |
934 | ||
132ca7e1 | 935 | dout("mount start %p\n", fsc); |
3d14c5d2 | 936 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 937 | |
132ca7e1 | 938 | if (!fsc->sb->s_root) { |
ce2728aa | 939 | const char *path; |
132ca7e1 YZ |
940 | err = __ceph_open_session(fsc->client, started); |
941 | if (err < 0) | |
942 | goto out; | |
16725b9d | 943 | |
1d8f8360 YZ |
944 | /* setup fscache */ |
945 | if (fsc->mount_options->flags & CEPH_MOUNT_OPT_FSCACHE) { | |
946 | err = ceph_fscache_register_fs(fsc); | |
947 | if (err < 0) | |
948 | goto out; | |
949 | } | |
950 | ||
ce2728aa YZ |
951 | if (!fsc->mount_options->server_path) { |
952 | path = ""; | |
953 | dout("mount opening path \\t\n"); | |
954 | } else { | |
955 | path = fsc->mount_options->server_path + 1; | |
956 | dout("mount opening path %s\n", path); | |
957 | } | |
18106734 | 958 | |
1a829ff2 | 959 | ceph_fs_debugfs_init(fsc); |
18106734 | 960 | |
ce2728aa | 961 | root = open_root_dentry(fsc, path, started); |
132ca7e1 YZ |
962 | if (IS_ERR(root)) { |
963 | err = PTR_ERR(root); | |
964 | goto out; | |
965 | } | |
ce2728aa | 966 | fsc->sb->s_root = dget(root); |
31ca5878 GU |
967 | } else { |
968 | root = dget(fsc->sb->s_root); | |
3d14c5d2 | 969 | } |
16725b9d | 970 | |
3d14c5d2 | 971 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 972 | dout("mount success\n"); |
a7f9fb20 AV |
973 | mutex_unlock(&fsc->client->mount_mutex); |
974 | return root; | |
16725b9d | 975 | |
132ca7e1 YZ |
976 | out: |
977 | mutex_unlock(&fsc->client->mount_mutex); | |
978 | return ERR_PTR(err); | |
16725b9d SW |
979 | } |
980 | ||
981 | static int ceph_set_super(struct super_block *s, void *data) | |
982 | { | |
3d14c5d2 | 983 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
984 | int ret; |
985 | ||
986 | dout("set_super %p data %p\n", s, data); | |
987 | ||
3d14c5d2 | 988 | s->s_flags = fsc->mount_options->sb_flags; |
719784ba | 989 | s->s_maxbytes = MAX_LFS_FILESIZE; |
16725b9d | 990 | |
7221fe4c | 991 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
992 | s->s_fs_info = fsc; |
993 | fsc->sb = s; | |
719784ba | 994 | fsc->max_file_size = 1ULL << 40; /* temp value until we get mdsmap */ |
16725b9d SW |
995 | |
996 | s->s_op = &ceph_super_ops; | |
18fc8abd | 997 | s->s_d_op = &ceph_dentry_ops; |
16725b9d SW |
998 | s->s_export_op = &ceph_export_ops; |
999 | ||
0f7cf80a | 1000 | s->s_time_gran = 1; |
028ca4db DD |
1001 | s->s_time_min = 0; |
1002 | s->s_time_max = U32_MAX; | |
16725b9d SW |
1003 | |
1004 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
1005 | if (ret != 0) | |
1006 | goto fail; | |
1007 | ||
1008 | return ret; | |
1009 | ||
1010 | fail: | |
1011 | s->s_fs_info = NULL; | |
3d14c5d2 | 1012 | fsc->sb = NULL; |
16725b9d SW |
1013 | return ret; |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * share superblock if same fs AND options | |
1018 | */ | |
1019 | static int ceph_compare_super(struct super_block *sb, void *data) | |
1020 | { | |
3d14c5d2 YS |
1021 | struct ceph_fs_client *new = data; |
1022 | struct ceph_mount_options *fsopt = new->mount_options; | |
1023 | struct ceph_options *opt = new->client->options; | |
1024 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
1025 | |
1026 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
1027 | |
1028 | if (compare_mount_options(fsopt, opt, other)) { | |
1029 | dout("monitor(s)/mount options don't match\n"); | |
1030 | return 0; | |
16725b9d | 1031 | } |
3d14c5d2 YS |
1032 | if ((opt->flags & CEPH_OPT_FSID) && |
1033 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
1034 | dout("fsid doesn't match\n"); | |
1035 | return 0; | |
1036 | } | |
1037 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
1038 | dout("flags differ\n"); |
1039 | return 0; | |
1040 | } | |
1041 | return 1; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * construct our own bdi so we can control readahead, etc. | |
1046 | */ | |
00d5643e | 1047 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 1048 | |
09dc9fc2 | 1049 | static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc) |
16725b9d SW |
1050 | { |
1051 | int err; | |
1052 | ||
09dc9fc2 JK |
1053 | err = super_setup_bdi_name(sb, "ceph-%ld", |
1054 | atomic_long_inc_return(&bdi_seq)); | |
1055 | if (err) | |
1056 | return err; | |
1057 | ||
83817e35 | 1058 | /* set ra_pages based on rasize mount option? */ |
4214fb15 | 1059 | sb->s_bdi->ra_pages = fsc->mount_options->rasize >> PAGE_SHIFT; |
e9852227 | 1060 | |
aa187926 YZ |
1061 | /* set io_pages based on max osd read size */ |
1062 | sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT; | |
7c94ba27 | 1063 | |
09dc9fc2 | 1064 | return 0; |
16725b9d SW |
1065 | } |
1066 | ||
a7f9fb20 AV |
1067 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
1068 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
1069 | { |
1070 | struct super_block *sb; | |
3d14c5d2 | 1071 | struct ceph_fs_client *fsc; |
a7f9fb20 | 1072 | struct dentry *res; |
16725b9d SW |
1073 | int err; |
1074 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
3d14c5d2 YS |
1075 | struct ceph_mount_options *fsopt = NULL; |
1076 | struct ceph_options *opt = NULL; | |
16725b9d | 1077 | |
a7f9fb20 | 1078 | dout("ceph_mount\n"); |
45195e42 SW |
1079 | |
1080 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
1751e8a6 | 1081 | flags |= SB_POSIXACL; |
45195e42 | 1082 | #endif |
3f384954 | 1083 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name); |
a7f9fb20 AV |
1084 | if (err < 0) { |
1085 | res = ERR_PTR(err); | |
6b805185 | 1086 | goto out_final; |
a7f9fb20 | 1087 | } |
16725b9d SW |
1088 | |
1089 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
1090 | fsc = create_fs_client(fsopt, opt); |
1091 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 1092 | res = ERR_CAST(fsc); |
6b805185 SW |
1093 | goto out_final; |
1094 | } | |
16725b9d | 1095 | |
3d14c5d2 | 1096 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
1097 | if (err < 0) { |
1098 | res = ERR_PTR(err); | |
3d14c5d2 | 1099 | goto out; |
a7f9fb20 | 1100 | } |
3d14c5d2 YS |
1101 | |
1102 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 1103 | compare_super = NULL; |
9249e17f | 1104 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 1105 | if (IS_ERR(sb)) { |
a7f9fb20 | 1106 | res = ERR_CAST(sb); |
16725b9d SW |
1107 | goto out; |
1108 | } | |
1109 | ||
3d14c5d2 | 1110 | if (ceph_sb_to_client(sb) != fsc) { |
3d14c5d2 YS |
1111 | destroy_fs_client(fsc); |
1112 | fsc = ceph_sb_to_client(sb); | |
1113 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 1114 | } else { |
3d14c5d2 | 1115 | dout("get_sb using new client %p\n", fsc); |
09dc9fc2 | 1116 | err = ceph_setup_bdi(sb, fsc); |
a7f9fb20 AV |
1117 | if (err < 0) { |
1118 | res = ERR_PTR(err); | |
16725b9d | 1119 | goto out_splat; |
a7f9fb20 | 1120 | } |
16725b9d SW |
1121 | } |
1122 | ||
3f384954 | 1123 | res = ceph_real_mount(fsc); |
a7f9fb20 | 1124 | if (IS_ERR(res)) |
16725b9d | 1125 | goto out_splat; |
a7f9fb20 | 1126 | dout("root %p inode %p ino %llx.%llx\n", res, |
2b0143b5 | 1127 | d_inode(res), ceph_vinop(d_inode(res))); |
a7f9fb20 | 1128 | return res; |
16725b9d SW |
1129 | |
1130 | out_splat: | |
3d14c5d2 | 1131 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 1132 | deactivate_locked_super(sb); |
16725b9d SW |
1133 | goto out_final; |
1134 | ||
1135 | out: | |
3d14c5d2 | 1136 | destroy_fs_client(fsc); |
16725b9d | 1137 | out_final: |
a7f9fb20 AV |
1138 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
1139 | return res; | |
16725b9d SW |
1140 | } |
1141 | ||
1142 | static void ceph_kill_sb(struct super_block *s) | |
1143 | { | |
3d14c5d2 | 1144 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
e4d27509 CH |
1145 | dev_t dev = s->s_dev; |
1146 | ||
16725b9d | 1147 | dout("kill_sb %p\n", s); |
e4d27509 | 1148 | |
3d14c5d2 | 1149 | ceph_mdsc_pre_umount(fsc->mdsc); |
a57d9064 YZ |
1150 | flush_fs_workqueues(fsc); |
1151 | ||
e4d27509 | 1152 | generic_shutdown_super(s); |
62a65f36 YZ |
1153 | |
1154 | fsc->client->extra_mon_dispatch = NULL; | |
1155 | ceph_fs_debugfs_cleanup(fsc); | |
1156 | ||
1d8f8360 YZ |
1157 | ceph_fscache_unregister_fs(fsc); |
1158 | ||
3d14c5d2 | 1159 | destroy_fs_client(fsc); |
e4d27509 | 1160 | free_anon_bdev(dev); |
16725b9d SW |
1161 | } |
1162 | ||
1163 | static struct file_system_type ceph_fs_type = { | |
1164 | .owner = THIS_MODULE, | |
1165 | .name = "ceph", | |
a7f9fb20 | 1166 | .mount = ceph_mount, |
16725b9d SW |
1167 | .kill_sb = ceph_kill_sb, |
1168 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1169 | }; | |
7f78e035 | 1170 | MODULE_ALIAS_FS("ceph"); |
16725b9d | 1171 | |
d468e729 YZ |
1172 | int ceph_force_reconnect(struct super_block *sb) |
1173 | { | |
1174 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); | |
1175 | int err = 0; | |
1176 | ||
1177 | ceph_umount_begin(sb); | |
1178 | ||
1179 | /* Make sure all page caches get invalidated. | |
1180 | * see remove_session_caps_cb() */ | |
1181 | flush_workqueue(fsc->inode_wq); | |
1182 | ||
1183 | /* In case that we were blacklisted. This also reset | |
1184 | * all mon/osd connections */ | |
1185 | ceph_reset_client_addr(fsc->client); | |
1186 | ||
1187 | ceph_osdc_clear_abort_err(&fsc->client->osdc); | |
131d7eb4 YZ |
1188 | |
1189 | fsc->blacklisted = false; | |
d468e729 YZ |
1190 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
1191 | ||
1192 | if (sb->s_root) { | |
1193 | err = __ceph_do_getattr(d_inode(sb->s_root), NULL, | |
1194 | CEPH_STAT_CAP_INODE, true); | |
1195 | } | |
1196 | return err; | |
1197 | } | |
1198 | ||
16725b9d SW |
1199 | static int __init init_ceph(void) |
1200 | { | |
3d14c5d2 | 1201 | int ret = init_caches(); |
16725b9d | 1202 | if (ret) |
3d14c5d2 | 1203 | goto out; |
16725b9d | 1204 | |
eb13e832 | 1205 | ceph_flock_init(); |
16725b9d SW |
1206 | ret = register_filesystem(&ceph_fs_type); |
1207 | if (ret) | |
d0f191d2 | 1208 | goto out_caches; |
16725b9d | 1209 | |
3d14c5d2 YS |
1210 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1211 | ||
16725b9d SW |
1212 | return 0; |
1213 | ||
d0f191d2 | 1214 | out_caches: |
16725b9d | 1215 | destroy_caches(); |
16725b9d SW |
1216 | out: |
1217 | return ret; | |
1218 | } | |
1219 | ||
1220 | static void __exit exit_ceph(void) | |
1221 | { | |
1222 | dout("exit_ceph\n"); | |
1223 | unregister_filesystem(&ceph_fs_type); | |
16725b9d | 1224 | destroy_caches(); |
16725b9d SW |
1225 | } |
1226 | ||
1227 | module_init(init_ceph); | |
1228 | module_exit(exit_ceph); | |
1229 | ||
1230 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1231 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1232 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1233 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1234 | MODULE_LICENSE("GPL"); |