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Commit | Line | Data |
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16725b9d | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
16725b9d SW |
3 | |
4 | #include <linux/backing-dev.h> | |
c309f0ab | 5 | #include <linux/ctype.h> |
16725b9d SW |
6 | #include <linux/fs.h> |
7 | #include <linux/inet.h> | |
8 | #include <linux/in6.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/mount.h> | |
11 | #include <linux/parser.h> | |
16725b9d SW |
12 | #include <linux/sched.h> |
13 | #include <linux/seq_file.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
16725b9d SW |
15 | #include <linux/statfs.h> |
16 | #include <linux/string.h> | |
16725b9d | 17 | |
16725b9d | 18 | #include "super.h" |
3d14c5d2 | 19 | #include "mds_client.h" |
99ccbd22 | 20 | #include "cache.h" |
3d14c5d2 | 21 | |
1fe60e51 | 22 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
23 | #include <linux/ceph/decode.h> |
24 | #include <linux/ceph/mon_client.h> | |
25 | #include <linux/ceph/auth.h> | |
26 | #include <linux/ceph/debugfs.h> | |
16725b9d SW |
27 | |
28 | /* | |
29 | * Ceph superblock operations | |
30 | * | |
31 | * Handle the basics of mounting, unmounting. | |
32 | */ | |
33 | ||
16725b9d SW |
34 | /* |
35 | * super ops | |
36 | */ | |
37 | static void ceph_put_super(struct super_block *s) | |
38 | { | |
3d14c5d2 | 39 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d SW |
40 | |
41 | dout("put_super\n"); | |
3d14c5d2 | 42 | ceph_mdsc_close_sessions(fsc->mdsc); |
16725b9d SW |
43 | } |
44 | ||
45 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
46 | { | |
2b0143b5 | 47 | struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry)); |
73fb0949 | 48 | struct ceph_mon_client *monc = &fsc->client->monc; |
16725b9d SW |
49 | struct ceph_statfs st; |
50 | u64 fsid; | |
51 | int err; | |
06d74376 DF |
52 | u64 data_pool; |
53 | ||
54 | if (fsc->mdsc->mdsmap->m_num_data_pg_pools == 1) { | |
55 | data_pool = fsc->mdsc->mdsmap->m_data_pg_pools[0]; | |
56 | } else { | |
57 | data_pool = CEPH_NOPOOL; | |
58 | } | |
16725b9d SW |
59 | |
60 | dout("statfs\n"); | |
73fb0949 | 61 | err = ceph_monc_do_statfs(monc, data_pool, &st); |
16725b9d SW |
62 | if (err < 0) |
63 | return err; | |
64 | ||
65 | /* fill in kstatfs */ | |
66 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
67 | ||
68 | /* | |
69 | * express utilization in terms of large blocks to avoid | |
70 | * overflow on 32-bit machines. | |
92a49fb0 SW |
71 | * |
72 | * NOTE: for the time being, we make bsize == frsize to humor | |
73 | * not-yet-ancient versions of glibc that are broken. | |
74 | * Someday, we will probably want to report a real block | |
75 | * size... whatever that may mean for a network file system! | |
16725b9d SW |
76 | */ |
77 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
92a49fb0 | 78 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
9122eed5 LH |
79 | |
80 | /* | |
81 | * By default use root quota for stats; fallback to overall filesystem | |
82 | * usage if using 'noquotadf' mount option or if the root dir doesn't | |
83 | * have max_bytes quota set. | |
84 | */ | |
85 | if (ceph_test_mount_opt(fsc, NOQUOTADF) || | |
86 | !ceph_quota_update_statfs(fsc, buf)) { | |
87 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
88 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
89 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
90 | } | |
16725b9d SW |
91 | |
92 | buf->f_files = le64_to_cpu(st.num_objects); | |
93 | buf->f_ffree = -1; | |
558d3499 | 94 | buf->f_namelen = NAME_MAX; |
16725b9d | 95 | |
080a330e | 96 | /* Must convert the fsid, for consistent values across arches */ |
73fb0949 LH |
97 | mutex_lock(&monc->mutex); |
98 | fsid = le64_to_cpu(*(__le64 *)(&monc->monmap->fsid)) ^ | |
99 | le64_to_cpu(*((__le64 *)&monc->monmap->fsid + 1)); | |
100 | mutex_unlock(&monc->mutex); | |
101 | ||
16725b9d SW |
102 | buf->f_fsid.val[0] = fsid & 0xffffffff; |
103 | buf->f_fsid.val[1] = fsid >> 32; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | ||
2d9c98ae | 109 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 110 | { |
3d14c5d2 | 111 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
112 | |
113 | if (!wait) { | |
114 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 115 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
116 | dout("sync_fs (non-blocking) done\n"); |
117 | return 0; | |
118 | } | |
119 | ||
120 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
121 | ceph_osdc_sync(&fsc->client->osdc); |
122 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 123 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
124 | return 0; |
125 | } | |
126 | ||
16725b9d SW |
127 | /* |
128 | * mount options | |
129 | */ | |
130 | enum { | |
16725b9d SW |
131 | Opt_wsize, |
132 | Opt_rsize, | |
83817e35 | 133 | Opt_rasize, |
16725b9d SW |
134 | Opt_caps_wanted_delay_min, |
135 | Opt_caps_wanted_delay_max, | |
136 | Opt_readdir_max_entries, | |
23804d91 | 137 | Opt_readdir_max_bytes, |
2baba250 | 138 | Opt_congestion_kb, |
e53c2fe0 | 139 | Opt_last_int, |
16725b9d SW |
140 | /* int args above */ |
141 | Opt_snapdirname, | |
430afbad | 142 | Opt_mds_namespace, |
1d8f8360 | 143 | Opt_fscache_uniq, |
e53c2fe0 | 144 | Opt_last_string, |
16725b9d | 145 | /* string args above */ |
16725b9d SW |
146 | Opt_dirstat, |
147 | Opt_nodirstat, | |
148 | Opt_rbytes, | |
149 | Opt_norbytes, | |
cffaba15 | 150 | Opt_asyncreaddir, |
16725b9d | 151 | Opt_noasyncreaddir, |
a40dc6cc SW |
152 | Opt_dcache, |
153 | Opt_nodcache, | |
ad1fee96 | 154 | Opt_ino32, |
cffaba15 | 155 | Opt_noino32, |
99ccbd22 | 156 | Opt_fscache, |
45195e42 | 157 | Opt_nofscache, |
10183a69 YZ |
158 | Opt_poolperm, |
159 | Opt_nopoolperm, | |
e9e427f0 YZ |
160 | Opt_require_active_mds, |
161 | Opt_norequire_active_mds, | |
45195e42 SW |
162 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
163 | Opt_acl, | |
164 | #endif | |
10183a69 | 165 | Opt_noacl, |
9122eed5 LH |
166 | Opt_quotadf, |
167 | Opt_noquotadf, | |
ea4cdc54 LH |
168 | Opt_copyfrom, |
169 | Opt_nocopyfrom, | |
16725b9d SW |
170 | }; |
171 | ||
3d14c5d2 | 172 | static match_table_t fsopt_tokens = { |
16725b9d SW |
173 | {Opt_wsize, "wsize=%d"}, |
174 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 175 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
176 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
177 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
178 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, | |
23804d91 | 179 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 180 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
181 | /* int args above */ |
182 | {Opt_snapdirname, "snapdirname=%s"}, | |
430afbad | 183 | {Opt_mds_namespace, "mds_namespace=%s"}, |
1d8f8360 | 184 | {Opt_fscache_uniq, "fsc=%s"}, |
16725b9d | 185 | /* string args above */ |
16725b9d SW |
186 | {Opt_dirstat, "dirstat"}, |
187 | {Opt_nodirstat, "nodirstat"}, | |
188 | {Opt_rbytes, "rbytes"}, | |
189 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 190 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 191 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
192 | {Opt_dcache, "dcache"}, |
193 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 194 | {Opt_ino32, "ino32"}, |
cffaba15 | 195 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
196 | {Opt_fscache, "fsc"}, |
197 | {Opt_nofscache, "nofsc"}, | |
10183a69 YZ |
198 | {Opt_poolperm, "poolperm"}, |
199 | {Opt_nopoolperm, "nopoolperm"}, | |
e9e427f0 YZ |
200 | {Opt_require_active_mds, "require_active_mds"}, |
201 | {Opt_norequire_active_mds, "norequire_active_mds"}, | |
45195e42 SW |
202 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
203 | {Opt_acl, "acl"}, | |
204 | #endif | |
205 | {Opt_noacl, "noacl"}, | |
9122eed5 LH |
206 | {Opt_quotadf, "quotadf"}, |
207 | {Opt_noquotadf, "noquotadf"}, | |
ea4cdc54 LH |
208 | {Opt_copyfrom, "copyfrom"}, |
209 | {Opt_nocopyfrom, "nocopyfrom"}, | |
16725b9d SW |
210 | {-1, NULL} |
211 | }; | |
212 | ||
3d14c5d2 | 213 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 214 | { |
3d14c5d2 YS |
215 | struct ceph_mount_options *fsopt = private; |
216 | substring_t argstr[MAX_OPT_ARGS]; | |
217 | int token, intval, ret; | |
218 | ||
219 | token = match_token((char *)c, fsopt_tokens, argstr); | |
220 | if (token < 0) | |
221 | return -EINVAL; | |
222 | ||
223 | if (token < Opt_last_int) { | |
224 | ret = match_int(&argstr[0], &intval); | |
225 | if (ret < 0) { | |
2f56b6ba | 226 | pr_err("bad option arg (not int) at '%s'\n", c); |
3d14c5d2 | 227 | return ret; |
c309f0ab | 228 | } |
3d14c5d2 YS |
229 | dout("got int token %d val %d\n", token, intval); |
230 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
231 | dout("got string token %d val %s\n", token, | |
232 | argstr[0].from); | |
233 | } else { | |
234 | dout("got token %d\n", token); | |
c309f0ab SW |
235 | } |
236 | ||
3d14c5d2 YS |
237 | switch (token) { |
238 | case Opt_snapdirname: | |
239 | kfree(fsopt->snapdir_name); | |
240 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
241 | argstr[0].to-argstr[0].from, | |
242 | GFP_KERNEL); | |
243 | if (!fsopt->snapdir_name) | |
244 | return -ENOMEM; | |
245 | break; | |
235a0982 | 246 | case Opt_mds_namespace: |
937441f3 | 247 | kfree(fsopt->mds_namespace); |
430afbad YZ |
248 | fsopt->mds_namespace = kstrndup(argstr[0].from, |
249 | argstr[0].to-argstr[0].from, | |
250 | GFP_KERNEL); | |
251 | if (!fsopt->mds_namespace) | |
252 | return -ENOMEM; | |
235a0982 | 253 | break; |
1d8f8360 | 254 | case Opt_fscache_uniq: |
937441f3 | 255 | kfree(fsopt->fscache_uniq); |
1d8f8360 YZ |
256 | fsopt->fscache_uniq = kstrndup(argstr[0].from, |
257 | argstr[0].to-argstr[0].from, | |
258 | GFP_KERNEL); | |
259 | if (!fsopt->fscache_uniq) | |
260 | return -ENOMEM; | |
261 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
262 | break; | |
430afbad | 263 | /* misc */ |
3d14c5d2 | 264 | case Opt_wsize: |
8db0c759 | 265 | if (intval < (int)PAGE_SIZE || intval > CEPH_MAX_WRITE_SIZE) |
95cca2b4 YZ |
266 | return -EINVAL; |
267 | fsopt->wsize = ALIGN(intval, PAGE_SIZE); | |
3d14c5d2 YS |
268 | break; |
269 | case Opt_rsize: | |
8db0c759 | 270 | if (intval < (int)PAGE_SIZE || intval > CEPH_MAX_READ_SIZE) |
aa187926 YZ |
271 | return -EINVAL; |
272 | fsopt->rsize = ALIGN(intval, PAGE_SIZE); | |
3d14c5d2 | 273 | break; |
83817e35 | 274 | case Opt_rasize: |
4214fb15 YZ |
275 | if (intval < 0) |
276 | return -EINVAL; | |
c36ed50d | 277 | fsopt->rasize = ALIGN(intval, PAGE_SIZE); |
83817e35 | 278 | break; |
3d14c5d2 | 279 | case Opt_caps_wanted_delay_min: |
4214fb15 YZ |
280 | if (intval < 1) |
281 | return -EINVAL; | |
3d14c5d2 YS |
282 | fsopt->caps_wanted_delay_min = intval; |
283 | break; | |
284 | case Opt_caps_wanted_delay_max: | |
4214fb15 YZ |
285 | if (intval < 1) |
286 | return -EINVAL; | |
3d14c5d2 YS |
287 | fsopt->caps_wanted_delay_max = intval; |
288 | break; | |
289 | case Opt_readdir_max_entries: | |
4214fb15 YZ |
290 | if (intval < 1) |
291 | return -EINVAL; | |
3d14c5d2 YS |
292 | fsopt->max_readdir = intval; |
293 | break; | |
294 | case Opt_readdir_max_bytes: | |
8db0c759 | 295 | if (intval < (int)PAGE_SIZE && intval != 0) |
4214fb15 | 296 | return -EINVAL; |
3d14c5d2 YS |
297 | fsopt->max_readdir_bytes = intval; |
298 | break; | |
299 | case Opt_congestion_kb: | |
4214fb15 YZ |
300 | if (intval < 1024) /* at least 1M */ |
301 | return -EINVAL; | |
3d14c5d2 YS |
302 | fsopt->congestion_kb = intval; |
303 | break; | |
304 | case Opt_dirstat: | |
305 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
306 | break; | |
307 | case Opt_nodirstat: | |
308 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
309 | break; | |
310 | case Opt_rbytes: | |
311 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
312 | break; | |
313 | case Opt_norbytes: | |
314 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
315 | break; | |
cffaba15 AE |
316 | case Opt_asyncreaddir: |
317 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
318 | break; | |
3d14c5d2 YS |
319 | case Opt_noasyncreaddir: |
320 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
321 | break; | |
a40dc6cc SW |
322 | case Opt_dcache: |
323 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
324 | break; | |
325 | case Opt_nodcache: | |
326 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
327 | break; | |
ad1fee96 YS |
328 | case Opt_ino32: |
329 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
330 | break; | |
cffaba15 AE |
331 | case Opt_noino32: |
332 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
333 | break; | |
99ccbd22 MT |
334 | case Opt_fscache: |
335 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
7ae7a828 CX |
336 | kfree(fsopt->fscache_uniq); |
337 | fsopt->fscache_uniq = NULL; | |
99ccbd22 MT |
338 | break; |
339 | case Opt_nofscache: | |
340 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
7ae7a828 CX |
341 | kfree(fsopt->fscache_uniq); |
342 | fsopt->fscache_uniq = NULL; | |
99ccbd22 | 343 | break; |
10183a69 YZ |
344 | case Opt_poolperm: |
345 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; | |
10183a69 YZ |
346 | break; |
347 | case Opt_nopoolperm: | |
348 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; | |
349 | break; | |
e9e427f0 YZ |
350 | case Opt_require_active_mds: |
351 | fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT; | |
352 | break; | |
353 | case Opt_norequire_active_mds: | |
354 | fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT; | |
355 | break; | |
9122eed5 LH |
356 | case Opt_quotadf: |
357 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF; | |
358 | break; | |
359 | case Opt_noquotadf: | |
360 | fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF; | |
361 | break; | |
ea4cdc54 LH |
362 | case Opt_copyfrom: |
363 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOCOPYFROM; | |
364 | break; | |
365 | case Opt_nocopyfrom: | |
366 | fsopt->flags |= CEPH_MOUNT_OPT_NOCOPYFROM; | |
367 | break; | |
45195e42 SW |
368 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
369 | case Opt_acl: | |
1751e8a6 | 370 | fsopt->sb_flags |= SB_POSIXACL; |
45195e42 SW |
371 | break; |
372 | #endif | |
373 | case Opt_noacl: | |
1751e8a6 | 374 | fsopt->sb_flags &= ~SB_POSIXACL; |
45195e42 | 375 | break; |
3d14c5d2 YS |
376 | default: |
377 | BUG_ON(token); | |
378 | } | |
379 | return 0; | |
c309f0ab | 380 | } |
16725b9d | 381 | |
3d14c5d2 | 382 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 383 | { |
3d14c5d2 YS |
384 | dout("destroy_mount_options %p\n", args); |
385 | kfree(args->snapdir_name); | |
430afbad | 386 | kfree(args->mds_namespace); |
3f384954 | 387 | kfree(args->server_path); |
1d8f8360 | 388 | kfree(args->fscache_uniq); |
3d14c5d2 YS |
389 | kfree(args); |
390 | } | |
16725b9d | 391 | |
3d14c5d2 YS |
392 | static int strcmp_null(const char *s1, const char *s2) |
393 | { | |
394 | if (!s1 && !s2) | |
395 | return 0; | |
396 | if (s1 && !s2) | |
397 | return -1; | |
398 | if (!s1 && s2) | |
399 | return 1; | |
400 | return strcmp(s1, s2); | |
401 | } | |
16725b9d | 402 | |
3d14c5d2 YS |
403 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
404 | struct ceph_options *new_opt, | |
405 | struct ceph_fs_client *fsc) | |
406 | { | |
407 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
408 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
409 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
410 | int ret; | |
16725b9d | 411 | |
3d14c5d2 YS |
412 | ret = memcmp(fsopt1, fsopt2, ofs); |
413 | if (ret) | |
414 | return ret; | |
415 | ||
416 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
430afbad YZ |
417 | if (ret) |
418 | return ret; | |
419 | ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); | |
3d14c5d2 YS |
420 | if (ret) |
421 | return ret; | |
3f384954 | 422 | ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); |
1d8f8360 YZ |
423 | if (ret) |
424 | return ret; | |
425 | ret = strcmp_null(fsopt1->fscache_uniq, fsopt2->fscache_uniq); | |
3f384954 YZ |
426 | if (ret) |
427 | return ret; | |
428 | ||
3d14c5d2 YS |
429 | return ceph_compare_options(new_opt, fsc->client); |
430 | } | |
431 | ||
432 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
433 | struct ceph_options **popt, | |
434 | int flags, char *options, | |
3f384954 | 435 | const char *dev_name) |
3d14c5d2 YS |
436 | { |
437 | struct ceph_mount_options *fsopt; | |
438 | const char *dev_name_end; | |
c98f533c AE |
439 | int err; |
440 | ||
441 | if (!dev_name || !*dev_name) | |
442 | return -EINVAL; | |
3d14c5d2 YS |
443 | |
444 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
445 | if (!fsopt) | |
446 | return -ENOMEM; | |
447 | ||
448 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
449 | ||
80db8bea NW |
450 | fsopt->sb_flags = flags; |
451 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 452 | |
95cca2b4 | 453 | fsopt->wsize = CEPH_MAX_WRITE_SIZE; |
aa187926 | 454 | fsopt->rsize = CEPH_MAX_READ_SIZE; |
80db8bea NW |
455 | fsopt->rasize = CEPH_RASIZE_DEFAULT; |
456 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
a149bb9a SK |
457 | if (!fsopt->snapdir_name) { |
458 | err = -ENOMEM; | |
459 | goto out; | |
460 | } | |
461 | ||
50aac4fe SW |
462 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
463 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
464 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; |
465 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
466 | fsopt->congestion_kb = default_congestion_kb(); | |
467 | ||
c98f533c AE |
468 | /* |
469 | * Distinguish the server list from the path in "dev_name". | |
470 | * Internally we do not include the leading '/' in the path. | |
471 | * | |
472 | * "dev_name" will look like: | |
473 | * <server_spec>[,<server_spec>...]:[<path>] | |
474 | * where | |
475 | * <server_spec> is <ip>[:<port>] | |
476 | * <path> is optional, but if present must begin with '/' | |
477 | */ | |
478 | dev_name_end = strchr(dev_name, '/'); | |
479 | if (dev_name_end) { | |
ce2728aa YZ |
480 | if (strlen(dev_name_end) > 1) { |
481 | fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); | |
482 | if (!fsopt->server_path) { | |
483 | err = -ENOMEM; | |
484 | goto out; | |
485 | } | |
3f384954 | 486 | } |
c98f533c | 487 | } else { |
c98f533c | 488 | dev_name_end = dev_name + strlen(dev_name); |
c98f533c | 489 | } |
80db8bea | 490 | err = -EINVAL; |
c98f533c | 491 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 492 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 493 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
494 | dev_name); |
495 | goto out; | |
496 | } | |
3d14c5d2 | 497 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
3f384954 YZ |
498 | if (fsopt->server_path) |
499 | dout("server path '%s'\n", fsopt->server_path); | |
16725b9d | 500 | |
ee57741c | 501 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 502 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
503 | if (IS_ERR(*popt)) { |
504 | err = PTR_ERR(*popt); | |
3d14c5d2 | 505 | goto out; |
ee57741c | 506 | } |
3d14c5d2 YS |
507 | |
508 | /* success */ | |
509 | *pfsopt = fsopt; | |
510 | return 0; | |
16725b9d | 511 | |
7b813c46 | 512 | out: |
3d14c5d2 YS |
513 | destroy_mount_options(fsopt); |
514 | return err; | |
16725b9d SW |
515 | } |
516 | ||
3d14c5d2 YS |
517 | /** |
518 | * ceph_show_options - Show mount options in /proc/mounts | |
519 | * @m: seq_file to write to | |
34c80b1d | 520 | * @root: root of that (sub)tree |
3d14c5d2 | 521 | */ |
34c80b1d | 522 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 523 | { |
34c80b1d | 524 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 | 525 | struct ceph_mount_options *fsopt = fsc->mount_options; |
ff40f9ae ID |
526 | size_t pos; |
527 | int ret; | |
528 | ||
529 | /* a comma between MNT/MS and client options */ | |
530 | seq_putc(m, ','); | |
531 | pos = m->count; | |
532 | ||
533 | ret = ceph_print_client_options(m, fsc->client); | |
534 | if (ret) | |
535 | return ret; | |
536 | ||
537 | /* retract our comma if no client options */ | |
538 | if (m->count == pos) | |
539 | m->count--; | |
3d14c5d2 YS |
540 | |
541 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
542 | seq_puts(m, ",dirstat"); | |
133e9156 YZ |
543 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
544 | seq_puts(m, ",rbytes"); | |
3d14c5d2 YS |
545 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
546 | seq_puts(m, ",noasyncreaddir"); | |
ff7eeb82 | 547 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
a40dc6cc | 548 | seq_puts(m, ",nodcache"); |
3619aa8b CX |
549 | if (fsopt->flags & CEPH_MOUNT_OPT_INO32) |
550 | seq_puts(m, ",ino32"); | |
1d8f8360 | 551 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) { |
4d8969af | 552 | seq_show_option(m, "fsc", fsopt->fscache_uniq); |
1d8f8360 | 553 | } |
10183a69 YZ |
554 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
555 | seq_puts(m, ",nopoolperm"); | |
9122eed5 LH |
556 | if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF) |
557 | seq_puts(m, ",noquotadf"); | |
3d14c5d2 | 558 | |
45195e42 | 559 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
1751e8a6 | 560 | if (fsopt->sb_flags & SB_POSIXACL) |
45195e42 SW |
561 | seq_puts(m, ",acl"); |
562 | else | |
563 | seq_puts(m, ",noacl"); | |
564 | #endif | |
565 | ||
6f9718fe LH |
566 | if ((fsopt->flags & CEPH_MOUNT_OPT_NOCOPYFROM) == 0) |
567 | seq_puts(m, ",copyfrom"); | |
ea4cdc54 | 568 | |
430afbad | 569 | if (fsopt->mds_namespace) |
4d8969af | 570 | seq_show_option(m, "mds_namespace", fsopt->mds_namespace); |
6dd4940b | 571 | if (fsopt->wsize != CEPH_MAX_WRITE_SIZE) |
3d14c5d2 | 572 | seq_printf(m, ",wsize=%d", fsopt->wsize); |
aa187926 | 573 | if (fsopt->rsize != CEPH_MAX_READ_SIZE) |
3d14c5d2 | 574 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 575 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 576 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
577 | if (fsopt->congestion_kb != default_congestion_kb()) |
578 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
579 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
580 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
581 | fsopt->caps_wanted_delay_min); | |
582 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
583 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
584 | fsopt->caps_wanted_delay_max); | |
3d14c5d2 YS |
585 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) |
586 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
587 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
588 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
589 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
a068acf2 | 590 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
ff40f9ae | 591 | |
3d14c5d2 | 592 | return 0; |
16725b9d SW |
593 | } |
594 | ||
595 | /* | |
3d14c5d2 YS |
596 | * handle any mon messages the standard library doesn't understand. |
597 | * return error if we don't either. | |
16725b9d | 598 | */ |
3d14c5d2 | 599 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 600 | { |
3d14c5d2 YS |
601 | struct ceph_fs_client *fsc = client->private; |
602 | int type = le16_to_cpu(msg->hdr.type); | |
603 | ||
604 | switch (type) { | |
605 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
606 | ceph_mdsc_handle_mdsmap(fsc->mdsc, msg); |
607 | return 0; | |
608 | case CEPH_MSG_FS_MAP_USER: | |
609 | ceph_mdsc_handle_fsmap(fsc->mdsc, msg); | |
3d14c5d2 | 610 | return 0; |
3d14c5d2 YS |
611 | default: |
612 | return -1; | |
613 | } | |
614 | } | |
615 | ||
616 | /* | |
617 | * create a new fs client | |
8aaff151 ID |
618 | * |
619 | * Success or not, this function consumes @fsopt and @opt. | |
3d14c5d2 | 620 | */ |
0c6d4b4e | 621 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
622 | struct ceph_options *opt) |
623 | { | |
624 | struct ceph_fs_client *fsc; | |
3bf53337 AE |
625 | int page_count; |
626 | size_t size; | |
8aaff151 | 627 | int err; |
16725b9d | 628 | |
3d14c5d2 | 629 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
8aaff151 ID |
630 | if (!fsc) { |
631 | err = -ENOMEM; | |
632 | goto fail; | |
633 | } | |
16725b9d | 634 | |
74da4a0f | 635 | fsc->client = ceph_create_client(opt, fsc); |
3d14c5d2 YS |
636 | if (IS_ERR(fsc->client)) { |
637 | err = PTR_ERR(fsc->client); | |
638 | goto fail; | |
639 | } | |
8aaff151 | 640 | opt = NULL; /* fsc->client now owns this */ |
c843d13c | 641 | |
3d14c5d2 | 642 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; |
c843d13c | 643 | fsc->client->osdc.abort_on_full = true; |
430afbad | 644 | |
d37b1d99 | 645 | if (!fsopt->mds_namespace) { |
430afbad YZ |
646 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, |
647 | 0, true); | |
648 | } else { | |
649 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP, | |
650 | 0, false); | |
651 | } | |
16725b9d | 652 | |
3d14c5d2 | 653 | fsc->mount_options = fsopt; |
16725b9d | 654 | |
3d14c5d2 YS |
655 | fsc->sb = NULL; |
656 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 657 | |
3d14c5d2 | 658 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d SW |
659 | |
660 | err = -ENOMEM; | |
01e6acc4 TH |
661 | /* |
662 | * The number of concurrent works can be high but they don't need | |
663 | * to be processed in parallel, limit concurrency. | |
664 | */ | |
665 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
d37b1d99 | 666 | if (!fsc->wb_wq) |
09dc9fc2 | 667 | goto fail_client; |
01e6acc4 | 668 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
d37b1d99 | 669 | if (!fsc->pg_inv_wq) |
16725b9d | 670 | goto fail_wb_wq; |
01e6acc4 | 671 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
d37b1d99 | 672 | if (!fsc->trunc_wq) |
16725b9d SW |
673 | goto fail_pg_inv_wq; |
674 | ||
b9bfb93c SW |
675 | /* set up mempools */ |
676 | err = -ENOMEM; | |
09cbfeaf | 677 | page_count = fsc->mount_options->wsize >> PAGE_SHIFT; |
3bf53337 AE |
678 | size = sizeof (struct page *) * (page_count ? page_count : 1); |
679 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 680 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
681 | goto fail_trunc_wq; |
682 | ||
85ccce43 | 683 | /* caps */ |
3d14c5d2 YS |
684 | fsc->min_caps = fsopt->max_readdir; |
685 | ||
686 | return fsc; | |
b9bfb93c | 687 | |
16725b9d | 688 | fail_trunc_wq: |
3d14c5d2 | 689 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 690 | fail_pg_inv_wq: |
3d14c5d2 | 691 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 692 | fail_wb_wq: |
3d14c5d2 | 693 | destroy_workqueue(fsc->wb_wq); |
3d14c5d2 YS |
694 | fail_client: |
695 | ceph_destroy_client(fsc->client); | |
16725b9d | 696 | fail: |
3d14c5d2 | 697 | kfree(fsc); |
8aaff151 ID |
698 | if (opt) |
699 | ceph_destroy_options(opt); | |
700 | destroy_mount_options(fsopt); | |
16725b9d SW |
701 | return ERR_PTR(err); |
702 | } | |
703 | ||
a57d9064 YZ |
704 | static void flush_fs_workqueues(struct ceph_fs_client *fsc) |
705 | { | |
706 | flush_workqueue(fsc->wb_wq); | |
707 | flush_workqueue(fsc->pg_inv_wq); | |
708 | flush_workqueue(fsc->trunc_wq); | |
709 | } | |
710 | ||
0c6d4b4e | 711 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 712 | { |
3d14c5d2 | 713 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 714 | |
3d14c5d2 YS |
715 | destroy_workqueue(fsc->wb_wq); |
716 | destroy_workqueue(fsc->pg_inv_wq); | |
717 | destroy_workqueue(fsc->trunc_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 | ||
3d14c5d2 YS |
835 | static const struct super_operations ceph_super_ops = { |
836 | .alloc_inode = ceph_alloc_inode, | |
837 | .destroy_inode = ceph_destroy_inode, | |
838 | .write_inode = ceph_write_inode, | |
9f12bd11 | 839 | .drop_inode = ceph_drop_inode, |
3d14c5d2 YS |
840 | .sync_fs = ceph_sync_fs, |
841 | .put_super = ceph_put_super, | |
842 | .show_options = ceph_show_options, | |
843 | .statfs = ceph_statfs, | |
844 | .umount_begin = ceph_umount_begin, | |
845 | }; | |
846 | ||
16725b9d SW |
847 | /* |
848 | * Bootstrap mount by opening the root directory. Note the mount | |
849 | * @started time from caller, and time out if this takes too long. | |
850 | */ | |
3d14c5d2 | 851 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
852 | const char *path, |
853 | unsigned long started) | |
854 | { | |
3d14c5d2 | 855 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
856 | struct ceph_mds_request *req = NULL; |
857 | int err; | |
858 | struct dentry *root; | |
859 | ||
860 | /* open dir */ | |
861 | dout("open_root_inode opening '%s'\n", path); | |
862 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
863 | if (IS_ERR(req)) | |
7e34bc52 | 864 | return ERR_CAST(req); |
16725b9d | 865 | req->r_path1 = kstrdup(path, GFP_NOFS); |
a149bb9a SK |
866 | if (!req->r_path1) { |
867 | root = ERR_PTR(-ENOMEM); | |
868 | goto out; | |
869 | } | |
870 | ||
16725b9d SW |
871 | req->r_ino1.ino = CEPH_INO_ROOT; |
872 | req->r_ino1.snap = CEPH_NOSNAP; | |
873 | req->r_started = started; | |
a319bf56 | 874 | req->r_timeout = fsc->client->options->mount_timeout; |
16725b9d SW |
875 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
876 | req->r_num_caps = 2; | |
877 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
878 | if (err == 0) { | |
3c5184ef AV |
879 | struct inode *inode = req->r_target_inode; |
880 | req->r_target_inode = NULL; | |
16725b9d | 881 | dout("open_root_inode success\n"); |
ce2728aa YZ |
882 | root = d_make_root(inode); |
883 | if (!root) { | |
884 | root = ERR_PTR(-ENOMEM); | |
885 | goto out; | |
774ac21d | 886 | } |
16725b9d SW |
887 | dout("open_root_inode success, root dentry is %p\n", root); |
888 | } else { | |
889 | root = ERR_PTR(err); | |
890 | } | |
3c5184ef | 891 | out: |
16725b9d SW |
892 | ceph_mdsc_put_request(req); |
893 | return root; | |
894 | } | |
895 | ||
3d14c5d2 YS |
896 | |
897 | ||
898 | ||
16725b9d SW |
899 | /* |
900 | * mount: join the ceph cluster, and open root directory. | |
901 | */ | |
3f384954 | 902 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc) |
16725b9d | 903 | { |
16725b9d | 904 | int err; |
16725b9d SW |
905 | unsigned long started = jiffies; /* note the start time */ |
906 | struct dentry *root; | |
907 | ||
132ca7e1 | 908 | dout("mount start %p\n", fsc); |
3d14c5d2 | 909 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 910 | |
132ca7e1 | 911 | if (!fsc->sb->s_root) { |
ce2728aa | 912 | const char *path; |
132ca7e1 YZ |
913 | err = __ceph_open_session(fsc->client, started); |
914 | if (err < 0) | |
915 | goto out; | |
16725b9d | 916 | |
1d8f8360 YZ |
917 | /* setup fscache */ |
918 | if (fsc->mount_options->flags & CEPH_MOUNT_OPT_FSCACHE) { | |
919 | err = ceph_fscache_register_fs(fsc); | |
920 | if (err < 0) | |
921 | goto out; | |
922 | } | |
923 | ||
ce2728aa YZ |
924 | if (!fsc->mount_options->server_path) { |
925 | path = ""; | |
926 | dout("mount opening path \\t\n"); | |
927 | } else { | |
928 | path = fsc->mount_options->server_path + 1; | |
929 | dout("mount opening path %s\n", path); | |
930 | } | |
18106734 CX |
931 | |
932 | err = ceph_fs_debugfs_init(fsc); | |
933 | if (err < 0) | |
934 | goto out; | |
935 | ||
ce2728aa | 936 | root = open_root_dentry(fsc, path, started); |
132ca7e1 YZ |
937 | if (IS_ERR(root)) { |
938 | err = PTR_ERR(root); | |
939 | goto out; | |
940 | } | |
ce2728aa | 941 | fsc->sb->s_root = dget(root); |
31ca5878 GU |
942 | } else { |
943 | root = dget(fsc->sb->s_root); | |
3d14c5d2 | 944 | } |
16725b9d | 945 | |
3d14c5d2 | 946 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 947 | dout("mount success\n"); |
a7f9fb20 AV |
948 | mutex_unlock(&fsc->client->mount_mutex); |
949 | return root; | |
16725b9d | 950 | |
132ca7e1 YZ |
951 | out: |
952 | mutex_unlock(&fsc->client->mount_mutex); | |
953 | return ERR_PTR(err); | |
16725b9d SW |
954 | } |
955 | ||
956 | static int ceph_set_super(struct super_block *s, void *data) | |
957 | { | |
3d14c5d2 | 958 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
959 | int ret; |
960 | ||
961 | dout("set_super %p data %p\n", s, data); | |
962 | ||
3d14c5d2 | 963 | s->s_flags = fsc->mount_options->sb_flags; |
719784ba | 964 | s->s_maxbytes = MAX_LFS_FILESIZE; |
16725b9d | 965 | |
7221fe4c | 966 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
967 | s->s_fs_info = fsc; |
968 | fsc->sb = s; | |
719784ba | 969 | fsc->max_file_size = 1ULL << 40; /* temp value until we get mdsmap */ |
16725b9d SW |
970 | |
971 | s->s_op = &ceph_super_ops; | |
18fc8abd | 972 | s->s_d_op = &ceph_dentry_ops; |
16725b9d SW |
973 | s->s_export_op = &ceph_export_ops; |
974 | ||
975 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
976 | ||
977 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
978 | if (ret != 0) | |
979 | goto fail; | |
980 | ||
981 | return ret; | |
982 | ||
983 | fail: | |
984 | s->s_fs_info = NULL; | |
3d14c5d2 | 985 | fsc->sb = NULL; |
16725b9d SW |
986 | return ret; |
987 | } | |
988 | ||
989 | /* | |
990 | * share superblock if same fs AND options | |
991 | */ | |
992 | static int ceph_compare_super(struct super_block *sb, void *data) | |
993 | { | |
3d14c5d2 YS |
994 | struct ceph_fs_client *new = data; |
995 | struct ceph_mount_options *fsopt = new->mount_options; | |
996 | struct ceph_options *opt = new->client->options; | |
997 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
998 | |
999 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
1000 | |
1001 | if (compare_mount_options(fsopt, opt, other)) { | |
1002 | dout("monitor(s)/mount options don't match\n"); | |
1003 | return 0; | |
16725b9d | 1004 | } |
3d14c5d2 YS |
1005 | if ((opt->flags & CEPH_OPT_FSID) && |
1006 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
1007 | dout("fsid doesn't match\n"); | |
1008 | return 0; | |
1009 | } | |
1010 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
1011 | dout("flags differ\n"); |
1012 | return 0; | |
1013 | } | |
1014 | return 1; | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * construct our own bdi so we can control readahead, etc. | |
1019 | */ | |
00d5643e | 1020 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 1021 | |
09dc9fc2 | 1022 | static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc) |
16725b9d SW |
1023 | { |
1024 | int err; | |
1025 | ||
09dc9fc2 JK |
1026 | err = super_setup_bdi_name(sb, "ceph-%ld", |
1027 | atomic_long_inc_return(&bdi_seq)); | |
1028 | if (err) | |
1029 | return err; | |
1030 | ||
83817e35 | 1031 | /* set ra_pages based on rasize mount option? */ |
4214fb15 | 1032 | sb->s_bdi->ra_pages = fsc->mount_options->rasize >> PAGE_SHIFT; |
e9852227 | 1033 | |
aa187926 YZ |
1034 | /* set io_pages based on max osd read size */ |
1035 | sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT; | |
7c94ba27 | 1036 | |
09dc9fc2 | 1037 | return 0; |
16725b9d SW |
1038 | } |
1039 | ||
a7f9fb20 AV |
1040 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
1041 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
1042 | { |
1043 | struct super_block *sb; | |
3d14c5d2 | 1044 | struct ceph_fs_client *fsc; |
a7f9fb20 | 1045 | struct dentry *res; |
16725b9d SW |
1046 | int err; |
1047 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
3d14c5d2 YS |
1048 | struct ceph_mount_options *fsopt = NULL; |
1049 | struct ceph_options *opt = NULL; | |
16725b9d | 1050 | |
a7f9fb20 | 1051 | dout("ceph_mount\n"); |
45195e42 SW |
1052 | |
1053 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
1751e8a6 | 1054 | flags |= SB_POSIXACL; |
45195e42 | 1055 | #endif |
3f384954 | 1056 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name); |
a7f9fb20 AV |
1057 | if (err < 0) { |
1058 | res = ERR_PTR(err); | |
6b805185 | 1059 | goto out_final; |
a7f9fb20 | 1060 | } |
16725b9d SW |
1061 | |
1062 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
1063 | fsc = create_fs_client(fsopt, opt); |
1064 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 1065 | res = ERR_CAST(fsc); |
6b805185 SW |
1066 | goto out_final; |
1067 | } | |
16725b9d | 1068 | |
3d14c5d2 | 1069 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
1070 | if (err < 0) { |
1071 | res = ERR_PTR(err); | |
3d14c5d2 | 1072 | goto out; |
a7f9fb20 | 1073 | } |
3d14c5d2 YS |
1074 | |
1075 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 1076 | compare_super = NULL; |
9249e17f | 1077 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 1078 | if (IS_ERR(sb)) { |
a7f9fb20 | 1079 | res = ERR_CAST(sb); |
16725b9d SW |
1080 | goto out; |
1081 | } | |
1082 | ||
3d14c5d2 YS |
1083 | if (ceph_sb_to_client(sb) != fsc) { |
1084 | ceph_mdsc_destroy(fsc); | |
1085 | destroy_fs_client(fsc); | |
1086 | fsc = ceph_sb_to_client(sb); | |
1087 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 1088 | } else { |
3d14c5d2 | 1089 | dout("get_sb using new client %p\n", fsc); |
09dc9fc2 | 1090 | err = ceph_setup_bdi(sb, fsc); |
a7f9fb20 AV |
1091 | if (err < 0) { |
1092 | res = ERR_PTR(err); | |
16725b9d | 1093 | goto out_splat; |
a7f9fb20 | 1094 | } |
16725b9d SW |
1095 | } |
1096 | ||
3f384954 | 1097 | res = ceph_real_mount(fsc); |
a7f9fb20 | 1098 | if (IS_ERR(res)) |
16725b9d | 1099 | goto out_splat; |
a7f9fb20 | 1100 | dout("root %p inode %p ino %llx.%llx\n", res, |
2b0143b5 | 1101 | d_inode(res), ceph_vinop(d_inode(res))); |
a7f9fb20 | 1102 | return res; |
16725b9d SW |
1103 | |
1104 | out_splat: | |
3d14c5d2 | 1105 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 1106 | deactivate_locked_super(sb); |
16725b9d SW |
1107 | goto out_final; |
1108 | ||
1109 | out: | |
3d14c5d2 YS |
1110 | ceph_mdsc_destroy(fsc); |
1111 | destroy_fs_client(fsc); | |
16725b9d | 1112 | out_final: |
a7f9fb20 AV |
1113 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
1114 | return res; | |
16725b9d SW |
1115 | } |
1116 | ||
1117 | static void ceph_kill_sb(struct super_block *s) | |
1118 | { | |
3d14c5d2 | 1119 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
e4d27509 CH |
1120 | dev_t dev = s->s_dev; |
1121 | ||
16725b9d | 1122 | dout("kill_sb %p\n", s); |
e4d27509 | 1123 | |
3d14c5d2 | 1124 | ceph_mdsc_pre_umount(fsc->mdsc); |
a57d9064 YZ |
1125 | flush_fs_workqueues(fsc); |
1126 | ||
e4d27509 | 1127 | generic_shutdown_super(s); |
62a65f36 YZ |
1128 | |
1129 | fsc->client->extra_mon_dispatch = NULL; | |
1130 | ceph_fs_debugfs_cleanup(fsc); | |
1131 | ||
1d8f8360 YZ |
1132 | ceph_fscache_unregister_fs(fsc); |
1133 | ||
3d14c5d2 | 1134 | ceph_mdsc_destroy(fsc); |
e4d27509 | 1135 | |
3d14c5d2 | 1136 | destroy_fs_client(fsc); |
e4d27509 | 1137 | free_anon_bdev(dev); |
16725b9d SW |
1138 | } |
1139 | ||
1140 | static struct file_system_type ceph_fs_type = { | |
1141 | .owner = THIS_MODULE, | |
1142 | .name = "ceph", | |
a7f9fb20 | 1143 | .mount = ceph_mount, |
16725b9d SW |
1144 | .kill_sb = ceph_kill_sb, |
1145 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1146 | }; | |
7f78e035 | 1147 | MODULE_ALIAS_FS("ceph"); |
16725b9d | 1148 | |
16725b9d SW |
1149 | static int __init init_ceph(void) |
1150 | { | |
3d14c5d2 | 1151 | int ret = init_caches(); |
16725b9d | 1152 | if (ret) |
3d14c5d2 | 1153 | goto out; |
16725b9d | 1154 | |
eb13e832 | 1155 | ceph_flock_init(); |
3ce6cd12 | 1156 | ceph_xattr_init(); |
16725b9d SW |
1157 | ret = register_filesystem(&ceph_fs_type); |
1158 | if (ret) | |
34b759b4 | 1159 | goto out_xattr; |
16725b9d | 1160 | |
3d14c5d2 YS |
1161 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1162 | ||
16725b9d SW |
1163 | return 0; |
1164 | ||
97c85a82 | 1165 | out_xattr: |
3ce6cd12 | 1166 | ceph_xattr_exit(); |
16725b9d | 1167 | destroy_caches(); |
16725b9d SW |
1168 | out: |
1169 | return ret; | |
1170 | } | |
1171 | ||
1172 | static void __exit exit_ceph(void) | |
1173 | { | |
1174 | dout("exit_ceph\n"); | |
1175 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 1176 | ceph_xattr_exit(); |
16725b9d | 1177 | destroy_caches(); |
16725b9d SW |
1178 | } |
1179 | ||
1180 | module_init(init_ceph); | |
1181 | module_exit(exit_ceph); | |
1182 | ||
1183 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1184 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1185 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1186 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1187 | MODULE_LICENSE("GPL"); |