]>
Commit | Line | Data |
---|---|---|
16725b9d | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
16725b9d SW |
3 | |
4 | #include <linux/backing-dev.h> | |
c309f0ab | 5 | #include <linux/ctype.h> |
16725b9d SW |
6 | #include <linux/fs.h> |
7 | #include <linux/inet.h> | |
8 | #include <linux/in6.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/mount.h> | |
11 | #include <linux/parser.h> | |
16725b9d SW |
12 | #include <linux/sched.h> |
13 | #include <linux/seq_file.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
16725b9d SW |
15 | #include <linux/statfs.h> |
16 | #include <linux/string.h> | |
16725b9d | 17 | |
16725b9d | 18 | #include "super.h" |
3d14c5d2 | 19 | #include "mds_client.h" |
99ccbd22 | 20 | #include "cache.h" |
3d14c5d2 | 21 | |
1fe60e51 | 22 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
23 | #include <linux/ceph/decode.h> |
24 | #include <linux/ceph/mon_client.h> | |
25 | #include <linux/ceph/auth.h> | |
26 | #include <linux/ceph/debugfs.h> | |
16725b9d SW |
27 | |
28 | /* | |
29 | * Ceph superblock operations | |
30 | * | |
31 | * Handle the basics of mounting, unmounting. | |
32 | */ | |
33 | ||
16725b9d SW |
34 | /* |
35 | * super ops | |
36 | */ | |
37 | static void ceph_put_super(struct super_block *s) | |
38 | { | |
3d14c5d2 | 39 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d SW |
40 | |
41 | dout("put_super\n"); | |
3d14c5d2 | 42 | ceph_mdsc_close_sessions(fsc->mdsc); |
16725b9d SW |
43 | } |
44 | ||
45 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
46 | { | |
2b0143b5 | 47 | struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry)); |
3d14c5d2 | 48 | struct ceph_monmap *monmap = fsc->client->monc.monmap; |
16725b9d SW |
49 | struct ceph_statfs st; |
50 | u64 fsid; | |
51 | int err; | |
52 | ||
53 | dout("statfs\n"); | |
3d14c5d2 | 54 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
16725b9d SW |
55 | if (err < 0) |
56 | return err; | |
57 | ||
58 | /* fill in kstatfs */ | |
59 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
60 | ||
61 | /* | |
62 | * express utilization in terms of large blocks to avoid | |
63 | * overflow on 32-bit machines. | |
92a49fb0 SW |
64 | * |
65 | * NOTE: for the time being, we make bsize == frsize to humor | |
66 | * not-yet-ancient versions of glibc that are broken. | |
67 | * Someday, we will probably want to report a real block | |
68 | * size... whatever that may mean for a network file system! | |
16725b9d SW |
69 | */ |
70 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
92a49fb0 | 71 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
16725b9d | 72 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); |
8f04d422 | 73 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
16725b9d SW |
74 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
75 | ||
76 | buf->f_files = le64_to_cpu(st.num_objects); | |
77 | buf->f_ffree = -1; | |
558d3499 | 78 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
79 | |
80 | /* leave fsid little-endian, regardless of host endianness */ | |
81 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
82 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
83 | buf->f_fsid.val[1] = fsid >> 32; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | ||
2d9c98ae | 89 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 90 | { |
3d14c5d2 | 91 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
92 | |
93 | if (!wait) { | |
94 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 95 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
96 | dout("sync_fs (non-blocking) done\n"); |
97 | return 0; | |
98 | } | |
99 | ||
100 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
101 | ceph_osdc_sync(&fsc->client->osdc); |
102 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 103 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
104 | return 0; |
105 | } | |
106 | ||
16725b9d SW |
107 | /* |
108 | * mount options | |
109 | */ | |
110 | enum { | |
16725b9d SW |
111 | Opt_wsize, |
112 | Opt_rsize, | |
83817e35 | 113 | Opt_rasize, |
16725b9d SW |
114 | Opt_caps_wanted_delay_min, |
115 | Opt_caps_wanted_delay_max, | |
6e19a16e | 116 | Opt_cap_release_safety, |
16725b9d | 117 | Opt_readdir_max_entries, |
23804d91 | 118 | Opt_readdir_max_bytes, |
2baba250 | 119 | Opt_congestion_kb, |
e53c2fe0 | 120 | Opt_last_int, |
16725b9d SW |
121 | /* int args above */ |
122 | Opt_snapdirname, | |
430afbad | 123 | Opt_mds_namespace, |
e53c2fe0 | 124 | Opt_last_string, |
16725b9d | 125 | /* string args above */ |
16725b9d SW |
126 | Opt_dirstat, |
127 | Opt_nodirstat, | |
128 | Opt_rbytes, | |
129 | Opt_norbytes, | |
cffaba15 | 130 | Opt_asyncreaddir, |
16725b9d | 131 | Opt_noasyncreaddir, |
a40dc6cc SW |
132 | Opt_dcache, |
133 | Opt_nodcache, | |
ad1fee96 | 134 | Opt_ino32, |
cffaba15 | 135 | Opt_noino32, |
99ccbd22 | 136 | Opt_fscache, |
45195e42 | 137 | Opt_nofscache, |
10183a69 YZ |
138 | Opt_poolperm, |
139 | Opt_nopoolperm, | |
45195e42 SW |
140 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
141 | Opt_acl, | |
142 | #endif | |
10183a69 | 143 | Opt_noacl, |
16725b9d SW |
144 | }; |
145 | ||
3d14c5d2 | 146 | static match_table_t fsopt_tokens = { |
16725b9d SW |
147 | {Opt_wsize, "wsize=%d"}, |
148 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 149 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
150 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
151 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 152 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 153 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 154 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 155 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
156 | /* int args above */ |
157 | {Opt_snapdirname, "snapdirname=%s"}, | |
430afbad | 158 | {Opt_mds_namespace, "mds_namespace=%s"}, |
16725b9d | 159 | /* string args above */ |
16725b9d SW |
160 | {Opt_dirstat, "dirstat"}, |
161 | {Opt_nodirstat, "nodirstat"}, | |
162 | {Opt_rbytes, "rbytes"}, | |
163 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 164 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 165 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
166 | {Opt_dcache, "dcache"}, |
167 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 168 | {Opt_ino32, "ino32"}, |
cffaba15 | 169 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
170 | {Opt_fscache, "fsc"}, |
171 | {Opt_nofscache, "nofsc"}, | |
10183a69 YZ |
172 | {Opt_poolperm, "poolperm"}, |
173 | {Opt_nopoolperm, "nopoolperm"}, | |
45195e42 SW |
174 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
175 | {Opt_acl, "acl"}, | |
176 | #endif | |
177 | {Opt_noacl, "noacl"}, | |
16725b9d SW |
178 | {-1, NULL} |
179 | }; | |
180 | ||
3d14c5d2 | 181 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 182 | { |
3d14c5d2 YS |
183 | struct ceph_mount_options *fsopt = private; |
184 | substring_t argstr[MAX_OPT_ARGS]; | |
185 | int token, intval, ret; | |
186 | ||
187 | token = match_token((char *)c, fsopt_tokens, argstr); | |
188 | if (token < 0) | |
189 | return -EINVAL; | |
190 | ||
191 | if (token < Opt_last_int) { | |
192 | ret = match_int(&argstr[0], &intval); | |
193 | if (ret < 0) { | |
194 | pr_err("bad mount option arg (not int) " | |
195 | "at '%s'\n", c); | |
196 | return ret; | |
c309f0ab | 197 | } |
3d14c5d2 YS |
198 | dout("got int token %d val %d\n", token, intval); |
199 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
200 | dout("got string token %d val %s\n", token, | |
201 | argstr[0].from); | |
202 | } else { | |
203 | dout("got token %d\n", token); | |
c309f0ab SW |
204 | } |
205 | ||
3d14c5d2 YS |
206 | switch (token) { |
207 | case Opt_snapdirname: | |
208 | kfree(fsopt->snapdir_name); | |
209 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
210 | argstr[0].to-argstr[0].from, | |
211 | GFP_KERNEL); | |
212 | if (!fsopt->snapdir_name) | |
213 | return -ENOMEM; | |
214 | break; | |
235a0982 | 215 | case Opt_mds_namespace: |
430afbad YZ |
216 | fsopt->mds_namespace = kstrndup(argstr[0].from, |
217 | argstr[0].to-argstr[0].from, | |
218 | GFP_KERNEL); | |
219 | if (!fsopt->mds_namespace) | |
220 | return -ENOMEM; | |
235a0982 | 221 | break; |
430afbad | 222 | /* misc */ |
3d14c5d2 YS |
223 | case Opt_wsize: |
224 | fsopt->wsize = intval; | |
225 | break; | |
226 | case Opt_rsize: | |
227 | fsopt->rsize = intval; | |
228 | break; | |
83817e35 SW |
229 | case Opt_rasize: |
230 | fsopt->rasize = intval; | |
231 | break; | |
3d14c5d2 YS |
232 | case Opt_caps_wanted_delay_min: |
233 | fsopt->caps_wanted_delay_min = intval; | |
234 | break; | |
235 | case Opt_caps_wanted_delay_max: | |
236 | fsopt->caps_wanted_delay_max = intval; | |
237 | break; | |
238 | case Opt_readdir_max_entries: | |
239 | fsopt->max_readdir = intval; | |
240 | break; | |
241 | case Opt_readdir_max_bytes: | |
242 | fsopt->max_readdir_bytes = intval; | |
243 | break; | |
244 | case Opt_congestion_kb: | |
245 | fsopt->congestion_kb = intval; | |
246 | break; | |
247 | case Opt_dirstat: | |
248 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
249 | break; | |
250 | case Opt_nodirstat: | |
251 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
252 | break; | |
253 | case Opt_rbytes: | |
254 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
255 | break; | |
256 | case Opt_norbytes: | |
257 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
258 | break; | |
cffaba15 AE |
259 | case Opt_asyncreaddir: |
260 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
261 | break; | |
3d14c5d2 YS |
262 | case Opt_noasyncreaddir: |
263 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
264 | break; | |
a40dc6cc SW |
265 | case Opt_dcache: |
266 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
267 | break; | |
268 | case Opt_nodcache: | |
269 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
270 | break; | |
ad1fee96 YS |
271 | case Opt_ino32: |
272 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
273 | break; | |
cffaba15 AE |
274 | case Opt_noino32: |
275 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
276 | break; | |
99ccbd22 MT |
277 | case Opt_fscache: |
278 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
279 | break; | |
280 | case Opt_nofscache: | |
281 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
282 | break; | |
10183a69 YZ |
283 | case Opt_poolperm: |
284 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; | |
285 | printk ("pool perm"); | |
286 | break; | |
287 | case Opt_nopoolperm: | |
288 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; | |
289 | break; | |
45195e42 SW |
290 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
291 | case Opt_acl: | |
292 | fsopt->sb_flags |= MS_POSIXACL; | |
293 | break; | |
294 | #endif | |
295 | case Opt_noacl: | |
296 | fsopt->sb_flags &= ~MS_POSIXACL; | |
297 | break; | |
3d14c5d2 YS |
298 | default: |
299 | BUG_ON(token); | |
300 | } | |
301 | return 0; | |
c309f0ab | 302 | } |
16725b9d | 303 | |
3d14c5d2 | 304 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 305 | { |
3d14c5d2 YS |
306 | dout("destroy_mount_options %p\n", args); |
307 | kfree(args->snapdir_name); | |
430afbad | 308 | kfree(args->mds_namespace); |
3f384954 | 309 | kfree(args->server_path); |
3d14c5d2 YS |
310 | kfree(args); |
311 | } | |
16725b9d | 312 | |
3d14c5d2 YS |
313 | static int strcmp_null(const char *s1, const char *s2) |
314 | { | |
315 | if (!s1 && !s2) | |
316 | return 0; | |
317 | if (s1 && !s2) | |
318 | return -1; | |
319 | if (!s1 && s2) | |
320 | return 1; | |
321 | return strcmp(s1, s2); | |
322 | } | |
16725b9d | 323 | |
3d14c5d2 YS |
324 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
325 | struct ceph_options *new_opt, | |
326 | struct ceph_fs_client *fsc) | |
327 | { | |
328 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
329 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
330 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
331 | int ret; | |
16725b9d | 332 | |
3d14c5d2 YS |
333 | ret = memcmp(fsopt1, fsopt2, ofs); |
334 | if (ret) | |
335 | return ret; | |
336 | ||
337 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
430afbad YZ |
338 | if (ret) |
339 | return ret; | |
340 | ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); | |
3d14c5d2 YS |
341 | if (ret) |
342 | return ret; | |
343 | ||
3f384954 YZ |
344 | ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); |
345 | if (ret) | |
346 | return ret; | |
347 | ||
3d14c5d2 YS |
348 | return ceph_compare_options(new_opt, fsc->client); |
349 | } | |
350 | ||
351 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
352 | struct ceph_options **popt, | |
353 | int flags, char *options, | |
3f384954 | 354 | const char *dev_name) |
3d14c5d2 YS |
355 | { |
356 | struct ceph_mount_options *fsopt; | |
357 | const char *dev_name_end; | |
c98f533c AE |
358 | int err; |
359 | ||
360 | if (!dev_name || !*dev_name) | |
361 | return -EINVAL; | |
3d14c5d2 YS |
362 | |
363 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
364 | if (!fsopt) | |
365 | return -ENOMEM; | |
366 | ||
367 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
368 | ||
80db8bea NW |
369 | fsopt->sb_flags = flags; |
370 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 371 | |
80db8bea NW |
372 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
373 | fsopt->rasize = CEPH_RASIZE_DEFAULT; | |
374 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
a149bb9a SK |
375 | if (!fsopt->snapdir_name) { |
376 | err = -ENOMEM; | |
377 | goto out; | |
378 | } | |
379 | ||
50aac4fe SW |
380 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
381 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
382 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
383 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
384 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
385 | fsopt->congestion_kb = default_congestion_kb(); | |
386 | ||
c98f533c AE |
387 | /* |
388 | * Distinguish the server list from the path in "dev_name". | |
389 | * Internally we do not include the leading '/' in the path. | |
390 | * | |
391 | * "dev_name" will look like: | |
392 | * <server_spec>[,<server_spec>...]:[<path>] | |
393 | * where | |
394 | * <server_spec> is <ip>[:<port>] | |
395 | * <path> is optional, but if present must begin with '/' | |
396 | */ | |
397 | dev_name_end = strchr(dev_name, '/'); | |
398 | if (dev_name_end) { | |
3f384954 YZ |
399 | fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); |
400 | if (!fsopt->server_path) { | |
401 | err = -ENOMEM; | |
402 | goto out; | |
403 | } | |
c98f533c | 404 | } else { |
c98f533c | 405 | dev_name_end = dev_name + strlen(dev_name); |
c98f533c | 406 | } |
80db8bea | 407 | err = -EINVAL; |
c98f533c | 408 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 409 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 410 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
411 | dev_name); |
412 | goto out; | |
413 | } | |
3d14c5d2 | 414 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
3f384954 YZ |
415 | if (fsopt->server_path) |
416 | dout("server path '%s'\n", fsopt->server_path); | |
16725b9d | 417 | |
ee57741c | 418 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 419 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
420 | if (IS_ERR(*popt)) { |
421 | err = PTR_ERR(*popt); | |
3d14c5d2 | 422 | goto out; |
ee57741c | 423 | } |
3d14c5d2 YS |
424 | |
425 | /* success */ | |
426 | *pfsopt = fsopt; | |
427 | return 0; | |
16725b9d | 428 | |
7b813c46 | 429 | out: |
3d14c5d2 YS |
430 | destroy_mount_options(fsopt); |
431 | return err; | |
16725b9d SW |
432 | } |
433 | ||
3d14c5d2 YS |
434 | /** |
435 | * ceph_show_options - Show mount options in /proc/mounts | |
436 | * @m: seq_file to write to | |
34c80b1d | 437 | * @root: root of that (sub)tree |
3d14c5d2 | 438 | */ |
34c80b1d | 439 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 440 | { |
34c80b1d | 441 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 | 442 | struct ceph_mount_options *fsopt = fsc->mount_options; |
ff40f9ae ID |
443 | size_t pos; |
444 | int ret; | |
445 | ||
446 | /* a comma between MNT/MS and client options */ | |
447 | seq_putc(m, ','); | |
448 | pos = m->count; | |
449 | ||
450 | ret = ceph_print_client_options(m, fsc->client); | |
451 | if (ret) | |
452 | return ret; | |
453 | ||
454 | /* retract our comma if no client options */ | |
455 | if (m->count == pos) | |
456 | m->count--; | |
3d14c5d2 YS |
457 | |
458 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
459 | seq_puts(m, ",dirstat"); | |
133e9156 YZ |
460 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
461 | seq_puts(m, ",rbytes"); | |
3d14c5d2 YS |
462 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
463 | seq_puts(m, ",noasyncreaddir"); | |
ff7eeb82 | 464 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
a40dc6cc | 465 | seq_puts(m, ",nodcache"); |
99ccbd22 MT |
466 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) |
467 | seq_puts(m, ",fsc"); | |
10183a69 YZ |
468 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
469 | seq_puts(m, ",nopoolperm"); | |
3d14c5d2 | 470 | |
45195e42 SW |
471 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
472 | if (fsopt->sb_flags & MS_POSIXACL) | |
473 | seq_puts(m, ",acl"); | |
474 | else | |
475 | seq_puts(m, ",noacl"); | |
476 | #endif | |
477 | ||
430afbad YZ |
478 | if (fsopt->mds_namespace) |
479 | seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace); | |
3d14c5d2 YS |
480 | if (fsopt->wsize) |
481 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 482 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 | 483 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 484 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 485 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
486 | if (fsopt->congestion_kb != default_congestion_kb()) |
487 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
488 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
489 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
490 | fsopt->caps_wanted_delay_min); | |
491 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
492 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
493 | fsopt->caps_wanted_delay_max); | |
494 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
495 | seq_printf(m, ",cap_release_safety=%d", | |
496 | fsopt->cap_release_safety); | |
497 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
498 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
499 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
500 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
501 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
a068acf2 | 502 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
ff40f9ae | 503 | |
3d14c5d2 | 504 | return 0; |
16725b9d SW |
505 | } |
506 | ||
507 | /* | |
3d14c5d2 YS |
508 | * handle any mon messages the standard library doesn't understand. |
509 | * return error if we don't either. | |
16725b9d | 510 | */ |
3d14c5d2 | 511 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 512 | { |
3d14c5d2 YS |
513 | struct ceph_fs_client *fsc = client->private; |
514 | int type = le16_to_cpu(msg->hdr.type); | |
515 | ||
516 | switch (type) { | |
517 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
518 | ceph_mdsc_handle_mdsmap(fsc->mdsc, msg); |
519 | return 0; | |
520 | case CEPH_MSG_FS_MAP_USER: | |
521 | ceph_mdsc_handle_fsmap(fsc->mdsc, msg); | |
3d14c5d2 | 522 | return 0; |
3d14c5d2 YS |
523 | default: |
524 | return -1; | |
525 | } | |
526 | } | |
527 | ||
528 | /* | |
529 | * create a new fs client | |
530 | */ | |
0c6d4b4e | 531 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
532 | struct ceph_options *opt) |
533 | { | |
534 | struct ceph_fs_client *fsc; | |
12b4629a | 535 | const u64 supported_features = |
d463a43d YZ |
536 | CEPH_FEATURE_FLOCK | CEPH_FEATURE_DIRLAYOUTHASH | |
537 | CEPH_FEATURE_MDSENC | CEPH_FEATURE_MDS_INLINE_DATA; | |
12b4629a | 538 | const u64 required_features = 0; |
3bf53337 AE |
539 | int page_count; |
540 | size_t size; | |
16725b9d SW |
541 | int err = -ENOMEM; |
542 | ||
3d14c5d2 YS |
543 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
544 | if (!fsc) | |
16725b9d SW |
545 | return ERR_PTR(-ENOMEM); |
546 | ||
6ab00d46 SW |
547 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
548 | required_features); | |
3d14c5d2 YS |
549 | if (IS_ERR(fsc->client)) { |
550 | err = PTR_ERR(fsc->client); | |
551 | goto fail; | |
552 | } | |
553 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
430afbad YZ |
554 | |
555 | if (fsopt->mds_namespace == NULL) { | |
556 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, | |
557 | 0, true); | |
558 | } else { | |
559 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP, | |
560 | 0, false); | |
561 | } | |
16725b9d | 562 | |
3d14c5d2 | 563 | fsc->mount_options = fsopt; |
16725b9d | 564 | |
3d14c5d2 YS |
565 | fsc->sb = NULL; |
566 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 567 | |
3d14c5d2 | 568 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 569 | |
3d14c5d2 | 570 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 571 | if (err < 0) |
3d14c5d2 | 572 | goto fail_client; |
859e7b14 | 573 | |
16725b9d | 574 | err = -ENOMEM; |
01e6acc4 TH |
575 | /* |
576 | * The number of concurrent works can be high but they don't need | |
577 | * to be processed in parallel, limit concurrency. | |
578 | */ | |
579 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 580 | if (fsc->wb_wq == NULL) |
859e7b14 | 581 | goto fail_bdi; |
01e6acc4 | 582 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 583 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 584 | goto fail_wb_wq; |
01e6acc4 | 585 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 586 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
587 | goto fail_pg_inv_wq; |
588 | ||
b9bfb93c SW |
589 | /* set up mempools */ |
590 | err = -ENOMEM; | |
09cbfeaf | 591 | page_count = fsc->mount_options->wsize >> PAGE_SHIFT; |
3bf53337 AE |
592 | size = sizeof (struct page *) * (page_count ? page_count : 1); |
593 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 594 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
595 | goto fail_trunc_wq; |
596 | ||
99ccbd22 MT |
597 | /* setup fscache */ |
598 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && | |
599 | (ceph_fscache_register_fs(fsc) != 0)) | |
600 | goto fail_fscache; | |
601 | ||
85ccce43 | 602 | /* caps */ |
3d14c5d2 YS |
603 | fsc->min_caps = fsopt->max_readdir; |
604 | ||
605 | return fsc; | |
b9bfb93c | 606 | |
99ccbd22 MT |
607 | fail_fscache: |
608 | ceph_fscache_unregister_fs(fsc); | |
16725b9d | 609 | fail_trunc_wq: |
3d14c5d2 | 610 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 611 | fail_pg_inv_wq: |
3d14c5d2 | 612 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 613 | fail_wb_wq: |
3d14c5d2 | 614 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 615 | fail_bdi: |
3d14c5d2 YS |
616 | bdi_destroy(&fsc->backing_dev_info); |
617 | fail_client: | |
618 | ceph_destroy_client(fsc->client); | |
16725b9d | 619 | fail: |
3d14c5d2 | 620 | kfree(fsc); |
16725b9d SW |
621 | return ERR_PTR(err); |
622 | } | |
623 | ||
0c6d4b4e | 624 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 625 | { |
3d14c5d2 | 626 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 627 | |
99ccbd22 MT |
628 | ceph_fscache_unregister_fs(fsc); |
629 | ||
3d14c5d2 YS |
630 | destroy_workqueue(fsc->wb_wq); |
631 | destroy_workqueue(fsc->pg_inv_wq); | |
632 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 633 | |
3d14c5d2 | 634 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 635 | |
3d14c5d2 | 636 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 637 | |
3d14c5d2 | 638 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 639 | |
3d14c5d2 | 640 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 641 | |
3d14c5d2 | 642 | ceph_destroy_client(fsc->client); |
16725b9d | 643 | |
3d14c5d2 YS |
644 | kfree(fsc); |
645 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
646 | } |
647 | ||
0743304d | 648 | /* |
3d14c5d2 | 649 | * caches |
0743304d | 650 | */ |
3d14c5d2 YS |
651 | struct kmem_cache *ceph_inode_cachep; |
652 | struct kmem_cache *ceph_cap_cachep; | |
f66fd9f0 | 653 | struct kmem_cache *ceph_cap_flush_cachep; |
3d14c5d2 YS |
654 | struct kmem_cache *ceph_dentry_cachep; |
655 | struct kmem_cache *ceph_file_cachep; | |
656 | ||
657 | static void ceph_inode_init_once(void *foo) | |
0743304d | 658 | { |
3d14c5d2 YS |
659 | struct ceph_inode_info *ci = foo; |
660 | inode_init_once(&ci->vfs_inode); | |
661 | } | |
662 | ||
663 | static int __init init_caches(void) | |
664 | { | |
99ccbd22 MT |
665 | int error = -ENOMEM; |
666 | ||
3d14c5d2 YS |
667 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
668 | sizeof(struct ceph_inode_info), | |
669 | __alignof__(struct ceph_inode_info), | |
5d097056 VD |
670 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
671 | SLAB_ACCOUNT, ceph_inode_init_once); | |
3d14c5d2 YS |
672 | if (ceph_inode_cachep == NULL) |
673 | return -ENOMEM; | |
674 | ||
675 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
676 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
677 | if (ceph_cap_cachep == NULL) | |
678 | goto bad_cap; | |
f66fd9f0 YZ |
679 | ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, |
680 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
681 | if (ceph_cap_flush_cachep == NULL) | |
682 | goto bad_cap_flush; | |
3d14c5d2 YS |
683 | |
684 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
685 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
686 | if (ceph_dentry_cachep == NULL) | |
687 | goto bad_dentry; | |
688 | ||
6b1a9a6c NB |
689 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD); |
690 | ||
3d14c5d2 YS |
691 | if (ceph_file_cachep == NULL) |
692 | goto bad_file; | |
693 | ||
99ccbd22 MT |
694 | if ((error = ceph_fscache_register())) |
695 | goto bad_file; | |
3d14c5d2 | 696 | |
99ccbd22 | 697 | return 0; |
3d14c5d2 YS |
698 | bad_file: |
699 | kmem_cache_destroy(ceph_dentry_cachep); | |
700 | bad_dentry: | |
f66fd9f0 YZ |
701 | kmem_cache_destroy(ceph_cap_flush_cachep); |
702 | bad_cap_flush: | |
3d14c5d2 YS |
703 | kmem_cache_destroy(ceph_cap_cachep); |
704 | bad_cap: | |
705 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 706 | return error; |
0743304d SW |
707 | } |
708 | ||
3d14c5d2 YS |
709 | static void destroy_caches(void) |
710 | { | |
8c0a8537 KS |
711 | /* |
712 | * Make sure all delayed rcu free inodes are flushed before we | |
713 | * destroy cache. | |
714 | */ | |
715 | rcu_barrier(); | |
99ccbd22 | 716 | |
3d14c5d2 YS |
717 | kmem_cache_destroy(ceph_inode_cachep); |
718 | kmem_cache_destroy(ceph_cap_cachep); | |
f66fd9f0 | 719 | kmem_cache_destroy(ceph_cap_flush_cachep); |
3d14c5d2 YS |
720 | kmem_cache_destroy(ceph_dentry_cachep); |
721 | kmem_cache_destroy(ceph_file_cachep); | |
99ccbd22 MT |
722 | |
723 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
724 | } |
725 | ||
726 | ||
16725b9d | 727 | /* |
3d14c5d2 YS |
728 | * ceph_umount_begin - initiate forced umount. Tear down down the |
729 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 730 | */ |
3d14c5d2 | 731 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 732 | { |
3d14c5d2 YS |
733 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
734 | ||
735 | dout("ceph_umount_begin - starting forced umount\n"); | |
736 | if (!fsc) | |
737 | return; | |
738 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
48fec5d0 | 739 | ceph_mdsc_force_umount(fsc->mdsc); |
3d14c5d2 | 740 | return; |
16725b9d SW |
741 | } |
742 | ||
3d14c5d2 YS |
743 | static const struct super_operations ceph_super_ops = { |
744 | .alloc_inode = ceph_alloc_inode, | |
745 | .destroy_inode = ceph_destroy_inode, | |
746 | .write_inode = ceph_write_inode, | |
9f12bd11 | 747 | .drop_inode = ceph_drop_inode, |
9a5530c6 | 748 | .evict_inode = ceph_evict_inode, |
3d14c5d2 YS |
749 | .sync_fs = ceph_sync_fs, |
750 | .put_super = ceph_put_super, | |
751 | .show_options = ceph_show_options, | |
752 | .statfs = ceph_statfs, | |
753 | .umount_begin = ceph_umount_begin, | |
754 | }; | |
755 | ||
16725b9d SW |
756 | /* |
757 | * Bootstrap mount by opening the root directory. Note the mount | |
758 | * @started time from caller, and time out if this takes too long. | |
759 | */ | |
3d14c5d2 | 760 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
761 | const char *path, |
762 | unsigned long started) | |
763 | { | |
3d14c5d2 | 764 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
765 | struct ceph_mds_request *req = NULL; |
766 | int err; | |
767 | struct dentry *root; | |
768 | ||
769 | /* open dir */ | |
770 | dout("open_root_inode opening '%s'\n", path); | |
771 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
772 | if (IS_ERR(req)) | |
7e34bc52 | 773 | return ERR_CAST(req); |
16725b9d | 774 | req->r_path1 = kstrdup(path, GFP_NOFS); |
a149bb9a SK |
775 | if (!req->r_path1) { |
776 | root = ERR_PTR(-ENOMEM); | |
777 | goto out; | |
778 | } | |
779 | ||
16725b9d SW |
780 | req->r_ino1.ino = CEPH_INO_ROOT; |
781 | req->r_ino1.snap = CEPH_NOSNAP; | |
782 | req->r_started = started; | |
a319bf56 | 783 | req->r_timeout = fsc->client->options->mount_timeout; |
16725b9d SW |
784 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
785 | req->r_num_caps = 2; | |
786 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
787 | if (err == 0) { | |
3c5184ef AV |
788 | struct inode *inode = req->r_target_inode; |
789 | req->r_target_inode = NULL; | |
16725b9d | 790 | dout("open_root_inode success\n"); |
3c5184ef | 791 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 792 | fsc->sb->s_root == NULL) { |
48fde701 | 793 | root = d_make_root(inode); |
3c5184ef | 794 | if (!root) { |
3c5184ef AV |
795 | root = ERR_PTR(-ENOMEM); |
796 | goto out; | |
797 | } | |
774ac21d | 798 | } else { |
1a0a397e | 799 | root = d_obtain_root(inode); |
774ac21d | 800 | } |
d46cfba5 | 801 | ceph_init_dentry(root); |
16725b9d SW |
802 | dout("open_root_inode success, root dentry is %p\n", root); |
803 | } else { | |
804 | root = ERR_PTR(err); | |
805 | } | |
3c5184ef | 806 | out: |
16725b9d SW |
807 | ceph_mdsc_put_request(req); |
808 | return root; | |
809 | } | |
810 | ||
3d14c5d2 YS |
811 | |
812 | ||
813 | ||
16725b9d SW |
814 | /* |
815 | * mount: join the ceph cluster, and open root directory. | |
816 | */ | |
3f384954 | 817 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc) |
16725b9d | 818 | { |
16725b9d | 819 | int err; |
16725b9d SW |
820 | unsigned long started = jiffies; /* note the start time */ |
821 | struct dentry *root; | |
3d14c5d2 | 822 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d | 823 | |
132ca7e1 | 824 | dout("mount start %p\n", fsc); |
3d14c5d2 | 825 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 826 | |
132ca7e1 YZ |
827 | if (!fsc->sb->s_root) { |
828 | err = __ceph_open_session(fsc->client, started); | |
829 | if (err < 0) | |
830 | goto out; | |
16725b9d | 831 | |
132ca7e1 YZ |
832 | dout("mount opening root\n"); |
833 | root = open_root_dentry(fsc, "", started); | |
834 | if (IS_ERR(root)) { | |
835 | err = PTR_ERR(root); | |
836 | goto out; | |
837 | } | |
3d14c5d2 YS |
838 | fsc->sb->s_root = root; |
839 | first = 1; | |
840 | ||
841 | err = ceph_fs_debugfs_init(fsc); | |
842 | if (err < 0) | |
843 | goto fail; | |
844 | } | |
16725b9d | 845 | |
3f384954 | 846 | if (!fsc->mount_options->server_path) { |
132ca7e1 | 847 | root = fsc->sb->s_root; |
16725b9d SW |
848 | dget(root); |
849 | } else { | |
3f384954 YZ |
850 | const char *path = fsc->mount_options->server_path + 1; |
851 | dout("mount opening path %s\n", path); | |
3d14c5d2 | 852 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
853 | if (IS_ERR(root)) { |
854 | err = PTR_ERR(root); | |
3d14c5d2 | 855 | goto fail; |
16725b9d SW |
856 | } |
857 | } | |
858 | ||
3d14c5d2 | 859 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 860 | dout("mount success\n"); |
a7f9fb20 AV |
861 | mutex_unlock(&fsc->client->mount_mutex); |
862 | return root; | |
16725b9d | 863 | |
3d14c5d2 YS |
864 | fail: |
865 | if (first) { | |
866 | dput(fsc->sb->s_root); | |
867 | fsc->sb->s_root = NULL; | |
868 | } | |
132ca7e1 YZ |
869 | out: |
870 | mutex_unlock(&fsc->client->mount_mutex); | |
871 | return ERR_PTR(err); | |
16725b9d SW |
872 | } |
873 | ||
874 | static int ceph_set_super(struct super_block *s, void *data) | |
875 | { | |
3d14c5d2 | 876 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
877 | int ret; |
878 | ||
879 | dout("set_super %p data %p\n", s, data); | |
880 | ||
3d14c5d2 | 881 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
882 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
883 | ||
7221fe4c | 884 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
885 | s->s_fs_info = fsc; |
886 | fsc->sb = s; | |
16725b9d SW |
887 | |
888 | s->s_op = &ceph_super_ops; | |
889 | s->s_export_op = &ceph_export_ops; | |
890 | ||
891 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
892 | ||
893 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
894 | if (ret != 0) | |
895 | goto fail; | |
896 | ||
897 | return ret; | |
898 | ||
899 | fail: | |
900 | s->s_fs_info = NULL; | |
3d14c5d2 | 901 | fsc->sb = NULL; |
16725b9d SW |
902 | return ret; |
903 | } | |
904 | ||
905 | /* | |
906 | * share superblock if same fs AND options | |
907 | */ | |
908 | static int ceph_compare_super(struct super_block *sb, void *data) | |
909 | { | |
3d14c5d2 YS |
910 | struct ceph_fs_client *new = data; |
911 | struct ceph_mount_options *fsopt = new->mount_options; | |
912 | struct ceph_options *opt = new->client->options; | |
913 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
914 | |
915 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
916 | |
917 | if (compare_mount_options(fsopt, opt, other)) { | |
918 | dout("monitor(s)/mount options don't match\n"); | |
919 | return 0; | |
16725b9d | 920 | } |
3d14c5d2 YS |
921 | if ((opt->flags & CEPH_OPT_FSID) && |
922 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
923 | dout("fsid doesn't match\n"); | |
924 | return 0; | |
925 | } | |
926 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
927 | dout("flags differ\n"); |
928 | return 0; | |
929 | } | |
930 | return 1; | |
931 | } | |
932 | ||
933 | /* | |
934 | * construct our own bdi so we can control readahead, etc. | |
935 | */ | |
00d5643e | 936 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 937 | |
3d14c5d2 YS |
938 | static int ceph_register_bdi(struct super_block *sb, |
939 | struct ceph_fs_client *fsc) | |
16725b9d SW |
940 | { |
941 | int err; | |
942 | ||
83817e35 | 943 | /* set ra_pages based on rasize mount option? */ |
09cbfeaf | 944 | if (fsc->mount_options->rasize >= PAGE_SIZE) |
3d14c5d2 | 945 | fsc->backing_dev_info.ra_pages = |
09cbfeaf | 946 | (fsc->mount_options->rasize + PAGE_SIZE - 1) |
16725b9d | 947 | >> PAGE_SHIFT; |
e9852227 YS |
948 | else |
949 | fsc->backing_dev_info.ra_pages = | |
09cbfeaf | 950 | VM_MAX_READAHEAD * 1024 / PAGE_SIZE; |
e9852227 | 951 | |
d2cc4dde | 952 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
31e0cf8f | 953 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 954 | if (!err) |
3d14c5d2 | 955 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
956 | return err; |
957 | } | |
958 | ||
a7f9fb20 AV |
959 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
960 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
961 | { |
962 | struct super_block *sb; | |
3d14c5d2 | 963 | struct ceph_fs_client *fsc; |
a7f9fb20 | 964 | struct dentry *res; |
16725b9d SW |
965 | int err; |
966 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
3d14c5d2 YS |
967 | struct ceph_mount_options *fsopt = NULL; |
968 | struct ceph_options *opt = NULL; | |
16725b9d | 969 | |
a7f9fb20 | 970 | dout("ceph_mount\n"); |
45195e42 SW |
971 | |
972 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
973 | flags |= MS_POSIXACL; | |
974 | #endif | |
3f384954 | 975 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name); |
a7f9fb20 AV |
976 | if (err < 0) { |
977 | res = ERR_PTR(err); | |
6b805185 | 978 | goto out_final; |
a7f9fb20 | 979 | } |
16725b9d SW |
980 | |
981 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
982 | fsc = create_fs_client(fsopt, opt); |
983 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 984 | res = ERR_CAST(fsc); |
259a187a NW |
985 | destroy_mount_options(fsopt); |
986 | ceph_destroy_options(opt); | |
6b805185 SW |
987 | goto out_final; |
988 | } | |
16725b9d | 989 | |
3d14c5d2 | 990 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
991 | if (err < 0) { |
992 | res = ERR_PTR(err); | |
3d14c5d2 | 993 | goto out; |
a7f9fb20 | 994 | } |
3d14c5d2 YS |
995 | |
996 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 997 | compare_super = NULL; |
9249e17f | 998 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 999 | if (IS_ERR(sb)) { |
a7f9fb20 | 1000 | res = ERR_CAST(sb); |
16725b9d SW |
1001 | goto out; |
1002 | } | |
1003 | ||
3d14c5d2 YS |
1004 | if (ceph_sb_to_client(sb) != fsc) { |
1005 | ceph_mdsc_destroy(fsc); | |
1006 | destroy_fs_client(fsc); | |
1007 | fsc = ceph_sb_to_client(sb); | |
1008 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 1009 | } else { |
3d14c5d2 YS |
1010 | dout("get_sb using new client %p\n", fsc); |
1011 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
1012 | if (err < 0) { |
1013 | res = ERR_PTR(err); | |
16725b9d | 1014 | goto out_splat; |
a7f9fb20 | 1015 | } |
16725b9d SW |
1016 | } |
1017 | ||
3f384954 | 1018 | res = ceph_real_mount(fsc); |
a7f9fb20 | 1019 | if (IS_ERR(res)) |
16725b9d | 1020 | goto out_splat; |
a7f9fb20 | 1021 | dout("root %p inode %p ino %llx.%llx\n", res, |
2b0143b5 | 1022 | d_inode(res), ceph_vinop(d_inode(res))); |
a7f9fb20 | 1023 | return res; |
16725b9d SW |
1024 | |
1025 | out_splat: | |
3d14c5d2 | 1026 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 1027 | deactivate_locked_super(sb); |
16725b9d SW |
1028 | goto out_final; |
1029 | ||
1030 | out: | |
3d14c5d2 YS |
1031 | ceph_mdsc_destroy(fsc); |
1032 | destroy_fs_client(fsc); | |
16725b9d | 1033 | out_final: |
a7f9fb20 AV |
1034 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
1035 | return res; | |
16725b9d SW |
1036 | } |
1037 | ||
1038 | static void ceph_kill_sb(struct super_block *s) | |
1039 | { | |
3d14c5d2 | 1040 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
e4d27509 CH |
1041 | dev_t dev = s->s_dev; |
1042 | ||
16725b9d | 1043 | dout("kill_sb %p\n", s); |
e4d27509 | 1044 | |
3d14c5d2 | 1045 | ceph_mdsc_pre_umount(fsc->mdsc); |
e4d27509 | 1046 | generic_shutdown_super(s); |
3d14c5d2 | 1047 | ceph_mdsc_destroy(fsc); |
e4d27509 | 1048 | |
3d14c5d2 | 1049 | destroy_fs_client(fsc); |
e4d27509 | 1050 | free_anon_bdev(dev); |
16725b9d SW |
1051 | } |
1052 | ||
1053 | static struct file_system_type ceph_fs_type = { | |
1054 | .owner = THIS_MODULE, | |
1055 | .name = "ceph", | |
a7f9fb20 | 1056 | .mount = ceph_mount, |
16725b9d SW |
1057 | .kill_sb = ceph_kill_sb, |
1058 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1059 | }; | |
7f78e035 | 1060 | MODULE_ALIAS_FS("ceph"); |
16725b9d | 1061 | |
16725b9d SW |
1062 | static int __init init_ceph(void) |
1063 | { | |
3d14c5d2 | 1064 | int ret = init_caches(); |
16725b9d | 1065 | if (ret) |
3d14c5d2 | 1066 | goto out; |
16725b9d | 1067 | |
eb13e832 | 1068 | ceph_flock_init(); |
3ce6cd12 | 1069 | ceph_xattr_init(); |
16725b9d SW |
1070 | ret = register_filesystem(&ceph_fs_type); |
1071 | if (ret) | |
34b759b4 | 1072 | goto out_xattr; |
16725b9d | 1073 | |
3d14c5d2 YS |
1074 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1075 | ||
16725b9d SW |
1076 | return 0; |
1077 | ||
97c85a82 | 1078 | out_xattr: |
3ce6cd12 | 1079 | ceph_xattr_exit(); |
16725b9d | 1080 | destroy_caches(); |
16725b9d SW |
1081 | out: |
1082 | return ret; | |
1083 | } | |
1084 | ||
1085 | static void __exit exit_ceph(void) | |
1086 | { | |
1087 | dout("exit_ceph\n"); | |
1088 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 1089 | ceph_xattr_exit(); |
16725b9d | 1090 | destroy_caches(); |
16725b9d SW |
1091 | } |
1092 | ||
1093 | module_init(init_ceph); | |
1094 | module_exit(exit_ceph); | |
1095 | ||
1096 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1097 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1098 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1099 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1100 | MODULE_LICENSE("GPL"); |