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