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, | |
e53c2fe0 | 123 | Opt_last_string, |
16725b9d | 124 | /* string args above */ |
16725b9d SW |
125 | Opt_dirstat, |
126 | Opt_nodirstat, | |
127 | Opt_rbytes, | |
128 | Opt_norbytes, | |
cffaba15 | 129 | Opt_asyncreaddir, |
16725b9d | 130 | Opt_noasyncreaddir, |
a40dc6cc SW |
131 | Opt_dcache, |
132 | Opt_nodcache, | |
ad1fee96 | 133 | Opt_ino32, |
cffaba15 | 134 | Opt_noino32, |
99ccbd22 | 135 | Opt_fscache, |
45195e42 | 136 | Opt_nofscache, |
10183a69 YZ |
137 | Opt_poolperm, |
138 | Opt_nopoolperm, | |
45195e42 SW |
139 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
140 | Opt_acl, | |
141 | #endif | |
10183a69 | 142 | Opt_noacl, |
16725b9d SW |
143 | }; |
144 | ||
3d14c5d2 | 145 | static match_table_t fsopt_tokens = { |
16725b9d SW |
146 | {Opt_wsize, "wsize=%d"}, |
147 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 148 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
149 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
150 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 151 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 152 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 153 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 154 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
155 | /* int args above */ |
156 | {Opt_snapdirname, "snapdirname=%s"}, | |
16725b9d | 157 | /* string args above */ |
16725b9d SW |
158 | {Opt_dirstat, "dirstat"}, |
159 | {Opt_nodirstat, "nodirstat"}, | |
160 | {Opt_rbytes, "rbytes"}, | |
161 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 162 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 163 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
164 | {Opt_dcache, "dcache"}, |
165 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 166 | {Opt_ino32, "ino32"}, |
cffaba15 | 167 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
168 | {Opt_fscache, "fsc"}, |
169 | {Opt_nofscache, "nofsc"}, | |
10183a69 YZ |
170 | {Opt_poolperm, "poolperm"}, |
171 | {Opt_nopoolperm, "nopoolperm"}, | |
45195e42 SW |
172 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
173 | {Opt_acl, "acl"}, | |
174 | #endif | |
175 | {Opt_noacl, "noacl"}, | |
16725b9d SW |
176 | {-1, NULL} |
177 | }; | |
178 | ||
3d14c5d2 | 179 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 180 | { |
3d14c5d2 YS |
181 | struct ceph_mount_options *fsopt = private; |
182 | substring_t argstr[MAX_OPT_ARGS]; | |
183 | int token, intval, ret; | |
184 | ||
185 | token = match_token((char *)c, fsopt_tokens, argstr); | |
186 | if (token < 0) | |
187 | return -EINVAL; | |
188 | ||
189 | if (token < Opt_last_int) { | |
190 | ret = match_int(&argstr[0], &intval); | |
191 | if (ret < 0) { | |
192 | pr_err("bad mount option arg (not int) " | |
193 | "at '%s'\n", c); | |
194 | return ret; | |
c309f0ab | 195 | } |
3d14c5d2 YS |
196 | dout("got int token %d val %d\n", token, intval); |
197 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
198 | dout("got string token %d val %s\n", token, | |
199 | argstr[0].from); | |
200 | } else { | |
201 | dout("got token %d\n", token); | |
c309f0ab SW |
202 | } |
203 | ||
3d14c5d2 YS |
204 | switch (token) { |
205 | case Opt_snapdirname: | |
206 | kfree(fsopt->snapdir_name); | |
207 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
208 | argstr[0].to-argstr[0].from, | |
209 | GFP_KERNEL); | |
210 | if (!fsopt->snapdir_name) | |
211 | return -ENOMEM; | |
212 | break; | |
213 | ||
214 | /* misc */ | |
215 | case Opt_wsize: | |
216 | fsopt->wsize = intval; | |
217 | break; | |
218 | case Opt_rsize: | |
219 | fsopt->rsize = intval; | |
220 | break; | |
83817e35 SW |
221 | case Opt_rasize: |
222 | fsopt->rasize = intval; | |
223 | break; | |
3d14c5d2 YS |
224 | case Opt_caps_wanted_delay_min: |
225 | fsopt->caps_wanted_delay_min = intval; | |
226 | break; | |
227 | case Opt_caps_wanted_delay_max: | |
228 | fsopt->caps_wanted_delay_max = intval; | |
229 | break; | |
230 | case Opt_readdir_max_entries: | |
231 | fsopt->max_readdir = intval; | |
232 | break; | |
233 | case Opt_readdir_max_bytes: | |
234 | fsopt->max_readdir_bytes = intval; | |
235 | break; | |
236 | case Opt_congestion_kb: | |
237 | fsopt->congestion_kb = intval; | |
238 | break; | |
239 | case Opt_dirstat: | |
240 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
241 | break; | |
242 | case Opt_nodirstat: | |
243 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
244 | break; | |
245 | case Opt_rbytes: | |
246 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
247 | break; | |
248 | case Opt_norbytes: | |
249 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
250 | break; | |
cffaba15 AE |
251 | case Opt_asyncreaddir: |
252 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
253 | break; | |
3d14c5d2 YS |
254 | case Opt_noasyncreaddir: |
255 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
256 | break; | |
a40dc6cc SW |
257 | case Opt_dcache: |
258 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
259 | break; | |
260 | case Opt_nodcache: | |
261 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
262 | break; | |
ad1fee96 YS |
263 | case Opt_ino32: |
264 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
265 | break; | |
cffaba15 AE |
266 | case Opt_noino32: |
267 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
268 | break; | |
99ccbd22 MT |
269 | case Opt_fscache: |
270 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
271 | break; | |
272 | case Opt_nofscache: | |
273 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
274 | break; | |
10183a69 YZ |
275 | case Opt_poolperm: |
276 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; | |
277 | printk ("pool perm"); | |
278 | break; | |
279 | case Opt_nopoolperm: | |
280 | fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; | |
281 | break; | |
45195e42 SW |
282 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
283 | case Opt_acl: | |
284 | fsopt->sb_flags |= MS_POSIXACL; | |
285 | break; | |
286 | #endif | |
287 | case Opt_noacl: | |
288 | fsopt->sb_flags &= ~MS_POSIXACL; | |
289 | break; | |
3d14c5d2 YS |
290 | default: |
291 | BUG_ON(token); | |
292 | } | |
293 | return 0; | |
c309f0ab | 294 | } |
16725b9d | 295 | |
3d14c5d2 | 296 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 297 | { |
3d14c5d2 YS |
298 | dout("destroy_mount_options %p\n", args); |
299 | kfree(args->snapdir_name); | |
300 | kfree(args); | |
301 | } | |
16725b9d | 302 | |
3d14c5d2 YS |
303 | static int strcmp_null(const char *s1, const char *s2) |
304 | { | |
305 | if (!s1 && !s2) | |
306 | return 0; | |
307 | if (s1 && !s2) | |
308 | return -1; | |
309 | if (!s1 && s2) | |
310 | return 1; | |
311 | return strcmp(s1, s2); | |
312 | } | |
16725b9d | 313 | |
3d14c5d2 YS |
314 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
315 | struct ceph_options *new_opt, | |
316 | struct ceph_fs_client *fsc) | |
317 | { | |
318 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
319 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
320 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
321 | int ret; | |
16725b9d | 322 | |
3d14c5d2 YS |
323 | ret = memcmp(fsopt1, fsopt2, ofs); |
324 | if (ret) | |
325 | return ret; | |
326 | ||
327 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
328 | if (ret) | |
329 | return ret; | |
330 | ||
331 | return ceph_compare_options(new_opt, fsc->client); | |
332 | } | |
333 | ||
334 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
335 | struct ceph_options **popt, | |
336 | int flags, char *options, | |
337 | const char *dev_name, | |
338 | const char **path) | |
339 | { | |
340 | struct ceph_mount_options *fsopt; | |
341 | const char *dev_name_end; | |
c98f533c AE |
342 | int err; |
343 | ||
344 | if (!dev_name || !*dev_name) | |
345 | return -EINVAL; | |
3d14c5d2 YS |
346 | |
347 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
348 | if (!fsopt) | |
349 | return -ENOMEM; | |
350 | ||
351 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
352 | ||
80db8bea NW |
353 | fsopt->sb_flags = flags; |
354 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 355 | |
80db8bea NW |
356 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
357 | fsopt->rasize = CEPH_RASIZE_DEFAULT; | |
358 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
a149bb9a SK |
359 | if (!fsopt->snapdir_name) { |
360 | err = -ENOMEM; | |
361 | goto out; | |
362 | } | |
363 | ||
50aac4fe SW |
364 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
365 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
366 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
367 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
368 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
369 | fsopt->congestion_kb = default_congestion_kb(); | |
370 | ||
c98f533c AE |
371 | /* |
372 | * Distinguish the server list from the path in "dev_name". | |
373 | * Internally we do not include the leading '/' in the path. | |
374 | * | |
375 | * "dev_name" will look like: | |
376 | * <server_spec>[,<server_spec>...]:[<path>] | |
377 | * where | |
378 | * <server_spec> is <ip>[:<port>] | |
379 | * <path> is optional, but if present must begin with '/' | |
380 | */ | |
381 | dev_name_end = strchr(dev_name, '/'); | |
382 | if (dev_name_end) { | |
383 | /* skip over leading '/' for path */ | |
384 | *path = dev_name_end + 1; | |
385 | } else { | |
386 | /* path is empty */ | |
387 | dev_name_end = dev_name + strlen(dev_name); | |
388 | *path = dev_name_end; | |
389 | } | |
80db8bea | 390 | err = -EINVAL; |
c98f533c | 391 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 392 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 393 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
394 | dev_name); |
395 | goto out; | |
396 | } | |
3d14c5d2 | 397 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
16725b9d SW |
398 | dout("server path '%s'\n", *path); |
399 | ||
ee57741c | 400 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 401 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
402 | if (IS_ERR(*popt)) { |
403 | err = PTR_ERR(*popt); | |
3d14c5d2 | 404 | goto out; |
ee57741c | 405 | } |
3d14c5d2 YS |
406 | |
407 | /* success */ | |
408 | *pfsopt = fsopt; | |
409 | return 0; | |
16725b9d | 410 | |
7b813c46 | 411 | out: |
3d14c5d2 YS |
412 | destroy_mount_options(fsopt); |
413 | return err; | |
16725b9d SW |
414 | } |
415 | ||
3d14c5d2 YS |
416 | /** |
417 | * ceph_show_options - Show mount options in /proc/mounts | |
418 | * @m: seq_file to write to | |
34c80b1d | 419 | * @root: root of that (sub)tree |
3d14c5d2 | 420 | */ |
34c80b1d | 421 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 422 | { |
34c80b1d | 423 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 | 424 | struct ceph_mount_options *fsopt = fsc->mount_options; |
ff40f9ae ID |
425 | size_t pos; |
426 | int ret; | |
427 | ||
428 | /* a comma between MNT/MS and client options */ | |
429 | seq_putc(m, ','); | |
430 | pos = m->count; | |
431 | ||
432 | ret = ceph_print_client_options(m, fsc->client); | |
433 | if (ret) | |
434 | return ret; | |
435 | ||
436 | /* retract our comma if no client options */ | |
437 | if (m->count == pos) | |
438 | m->count--; | |
3d14c5d2 YS |
439 | |
440 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
441 | seq_puts(m, ",dirstat"); | |
133e9156 YZ |
442 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES)) |
443 | seq_puts(m, ",rbytes"); | |
3d14c5d2 YS |
444 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) |
445 | seq_puts(m, ",noasyncreaddir"); | |
ff7eeb82 | 446 | if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) |
a40dc6cc | 447 | seq_puts(m, ",nodcache"); |
99ccbd22 MT |
448 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) |
449 | seq_puts(m, ",fsc"); | |
10183a69 YZ |
450 | if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) |
451 | seq_puts(m, ",nopoolperm"); | |
3d14c5d2 | 452 | |
45195e42 SW |
453 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
454 | if (fsopt->sb_flags & MS_POSIXACL) | |
455 | seq_puts(m, ",acl"); | |
456 | else | |
457 | seq_puts(m, ",noacl"); | |
458 | #endif | |
459 | ||
3d14c5d2 YS |
460 | if (fsopt->wsize) |
461 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 462 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 | 463 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 464 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 465 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
466 | if (fsopt->congestion_kb != default_congestion_kb()) |
467 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
468 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
469 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
470 | fsopt->caps_wanted_delay_min); | |
471 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
472 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
473 | fsopt->caps_wanted_delay_max); | |
474 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
475 | seq_printf(m, ",cap_release_safety=%d", | |
476 | fsopt->cap_release_safety); | |
477 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
478 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
479 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
480 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
481 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
a068acf2 | 482 | seq_show_option(m, "snapdirname", fsopt->snapdir_name); |
ff40f9ae | 483 | |
3d14c5d2 | 484 | return 0; |
16725b9d SW |
485 | } |
486 | ||
487 | /* | |
3d14c5d2 YS |
488 | * handle any mon messages the standard library doesn't understand. |
489 | * return error if we don't either. | |
16725b9d | 490 | */ |
3d14c5d2 | 491 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 492 | { |
3d14c5d2 YS |
493 | struct ceph_fs_client *fsc = client->private; |
494 | int type = le16_to_cpu(msg->hdr.type); | |
495 | ||
496 | switch (type) { | |
497 | case CEPH_MSG_MDS_MAP: | |
498 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
499 | return 0; | |
500 | ||
501 | default: | |
502 | return -1; | |
503 | } | |
504 | } | |
505 | ||
506 | /* | |
507 | * create a new fs client | |
508 | */ | |
0c6d4b4e | 509 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
510 | struct ceph_options *opt) |
511 | { | |
512 | struct ceph_fs_client *fsc; | |
12b4629a | 513 | const u64 supported_features = |
6ab00d46 | 514 | CEPH_FEATURE_FLOCK | |
65a22662 YZ |
515 | CEPH_FEATURE_DIRLAYOUTHASH | |
516 | CEPH_FEATURE_MDS_INLINE_DATA; | |
12b4629a | 517 | const u64 required_features = 0; |
3bf53337 AE |
518 | int page_count; |
519 | size_t size; | |
16725b9d SW |
520 | int err = -ENOMEM; |
521 | ||
3d14c5d2 YS |
522 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
523 | if (!fsc) | |
16725b9d SW |
524 | return ERR_PTR(-ENOMEM); |
525 | ||
6ab00d46 SW |
526 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
527 | required_features); | |
3d14c5d2 YS |
528 | if (IS_ERR(fsc->client)) { |
529 | err = PTR_ERR(fsc->client); | |
530 | goto fail; | |
531 | } | |
532 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
82dcabad | 533 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, 0, true); |
16725b9d | 534 | |
3d14c5d2 | 535 | fsc->mount_options = fsopt; |
16725b9d | 536 | |
3d14c5d2 YS |
537 | fsc->sb = NULL; |
538 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 539 | |
3d14c5d2 | 540 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 541 | |
3d14c5d2 | 542 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 543 | if (err < 0) |
3d14c5d2 | 544 | goto fail_client; |
859e7b14 | 545 | |
16725b9d | 546 | err = -ENOMEM; |
01e6acc4 TH |
547 | /* |
548 | * The number of concurrent works can be high but they don't need | |
549 | * to be processed in parallel, limit concurrency. | |
550 | */ | |
551 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 552 | if (fsc->wb_wq == NULL) |
859e7b14 | 553 | goto fail_bdi; |
01e6acc4 | 554 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 555 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 556 | goto fail_wb_wq; |
01e6acc4 | 557 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 558 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
559 | goto fail_pg_inv_wq; |
560 | ||
b9bfb93c SW |
561 | /* set up mempools */ |
562 | err = -ENOMEM; | |
3bf53337 AE |
563 | page_count = fsc->mount_options->wsize >> PAGE_CACHE_SHIFT; |
564 | size = sizeof (struct page *) * (page_count ? page_count : 1); | |
565 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 566 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
567 | goto fail_trunc_wq; |
568 | ||
99ccbd22 MT |
569 | /* setup fscache */ |
570 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && | |
571 | (ceph_fscache_register_fs(fsc) != 0)) | |
572 | goto fail_fscache; | |
573 | ||
85ccce43 | 574 | /* caps */ |
3d14c5d2 YS |
575 | fsc->min_caps = fsopt->max_readdir; |
576 | ||
577 | return fsc; | |
b9bfb93c | 578 | |
99ccbd22 MT |
579 | fail_fscache: |
580 | ceph_fscache_unregister_fs(fsc); | |
16725b9d | 581 | fail_trunc_wq: |
3d14c5d2 | 582 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 583 | fail_pg_inv_wq: |
3d14c5d2 | 584 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 585 | fail_wb_wq: |
3d14c5d2 | 586 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 587 | fail_bdi: |
3d14c5d2 YS |
588 | bdi_destroy(&fsc->backing_dev_info); |
589 | fail_client: | |
590 | ceph_destroy_client(fsc->client); | |
16725b9d | 591 | fail: |
3d14c5d2 | 592 | kfree(fsc); |
16725b9d SW |
593 | return ERR_PTR(err); |
594 | } | |
595 | ||
0c6d4b4e | 596 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 597 | { |
3d14c5d2 | 598 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 599 | |
99ccbd22 MT |
600 | ceph_fscache_unregister_fs(fsc); |
601 | ||
3d14c5d2 YS |
602 | destroy_workqueue(fsc->wb_wq); |
603 | destroy_workqueue(fsc->pg_inv_wq); | |
604 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 605 | |
3d14c5d2 | 606 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 607 | |
3d14c5d2 | 608 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 609 | |
3d14c5d2 | 610 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 611 | |
3d14c5d2 | 612 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 613 | |
3d14c5d2 | 614 | ceph_destroy_client(fsc->client); |
16725b9d | 615 | |
3d14c5d2 YS |
616 | kfree(fsc); |
617 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
618 | } |
619 | ||
0743304d | 620 | /* |
3d14c5d2 | 621 | * caches |
0743304d | 622 | */ |
3d14c5d2 YS |
623 | struct kmem_cache *ceph_inode_cachep; |
624 | struct kmem_cache *ceph_cap_cachep; | |
f66fd9f0 | 625 | struct kmem_cache *ceph_cap_flush_cachep; |
3d14c5d2 YS |
626 | struct kmem_cache *ceph_dentry_cachep; |
627 | struct kmem_cache *ceph_file_cachep; | |
628 | ||
629 | static void ceph_inode_init_once(void *foo) | |
0743304d | 630 | { |
3d14c5d2 YS |
631 | struct ceph_inode_info *ci = foo; |
632 | inode_init_once(&ci->vfs_inode); | |
633 | } | |
634 | ||
635 | static int __init init_caches(void) | |
636 | { | |
99ccbd22 MT |
637 | int error = -ENOMEM; |
638 | ||
3d14c5d2 YS |
639 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
640 | sizeof(struct ceph_inode_info), | |
641 | __alignof__(struct ceph_inode_info), | |
5d097056 VD |
642 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| |
643 | SLAB_ACCOUNT, ceph_inode_init_once); | |
3d14c5d2 YS |
644 | if (ceph_inode_cachep == NULL) |
645 | return -ENOMEM; | |
646 | ||
647 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
648 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
649 | if (ceph_cap_cachep == NULL) | |
650 | goto bad_cap; | |
f66fd9f0 YZ |
651 | ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, |
652 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
653 | if (ceph_cap_flush_cachep == NULL) | |
654 | goto bad_cap_flush; | |
3d14c5d2 YS |
655 | |
656 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
657 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
658 | if (ceph_dentry_cachep == NULL) | |
659 | goto bad_dentry; | |
660 | ||
661 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
662 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
663 | if (ceph_file_cachep == NULL) | |
664 | goto bad_file; | |
665 | ||
99ccbd22 MT |
666 | if ((error = ceph_fscache_register())) |
667 | goto bad_file; | |
3d14c5d2 | 668 | |
99ccbd22 | 669 | return 0; |
3d14c5d2 YS |
670 | bad_file: |
671 | kmem_cache_destroy(ceph_dentry_cachep); | |
672 | bad_dentry: | |
f66fd9f0 YZ |
673 | kmem_cache_destroy(ceph_cap_flush_cachep); |
674 | bad_cap_flush: | |
3d14c5d2 YS |
675 | kmem_cache_destroy(ceph_cap_cachep); |
676 | bad_cap: | |
677 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 678 | return error; |
0743304d SW |
679 | } |
680 | ||
3d14c5d2 YS |
681 | static void destroy_caches(void) |
682 | { | |
8c0a8537 KS |
683 | /* |
684 | * Make sure all delayed rcu free inodes are flushed before we | |
685 | * destroy cache. | |
686 | */ | |
687 | rcu_barrier(); | |
99ccbd22 | 688 | |
3d14c5d2 YS |
689 | kmem_cache_destroy(ceph_inode_cachep); |
690 | kmem_cache_destroy(ceph_cap_cachep); | |
f66fd9f0 | 691 | kmem_cache_destroy(ceph_cap_flush_cachep); |
3d14c5d2 YS |
692 | kmem_cache_destroy(ceph_dentry_cachep); |
693 | kmem_cache_destroy(ceph_file_cachep); | |
99ccbd22 MT |
694 | |
695 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
696 | } |
697 | ||
698 | ||
16725b9d | 699 | /* |
3d14c5d2 YS |
700 | * ceph_umount_begin - initiate forced umount. Tear down down the |
701 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 702 | */ |
3d14c5d2 | 703 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 704 | { |
3d14c5d2 YS |
705 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
706 | ||
707 | dout("ceph_umount_begin - starting forced umount\n"); | |
708 | if (!fsc) | |
709 | return; | |
710 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
48fec5d0 | 711 | ceph_mdsc_force_umount(fsc->mdsc); |
3d14c5d2 | 712 | return; |
16725b9d SW |
713 | } |
714 | ||
3d14c5d2 YS |
715 | static const struct super_operations ceph_super_ops = { |
716 | .alloc_inode = ceph_alloc_inode, | |
717 | .destroy_inode = ceph_destroy_inode, | |
718 | .write_inode = ceph_write_inode, | |
9f12bd11 | 719 | .drop_inode = ceph_drop_inode, |
3d14c5d2 YS |
720 | .sync_fs = ceph_sync_fs, |
721 | .put_super = ceph_put_super, | |
722 | .show_options = ceph_show_options, | |
723 | .statfs = ceph_statfs, | |
724 | .umount_begin = ceph_umount_begin, | |
725 | }; | |
726 | ||
16725b9d SW |
727 | /* |
728 | * Bootstrap mount by opening the root directory. Note the mount | |
729 | * @started time from caller, and time out if this takes too long. | |
730 | */ | |
3d14c5d2 | 731 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
732 | const char *path, |
733 | unsigned long started) | |
734 | { | |
3d14c5d2 | 735 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
736 | struct ceph_mds_request *req = NULL; |
737 | int err; | |
738 | struct dentry *root; | |
739 | ||
740 | /* open dir */ | |
741 | dout("open_root_inode opening '%s'\n", path); | |
742 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
743 | if (IS_ERR(req)) | |
7e34bc52 | 744 | return ERR_CAST(req); |
16725b9d | 745 | req->r_path1 = kstrdup(path, GFP_NOFS); |
a149bb9a SK |
746 | if (!req->r_path1) { |
747 | root = ERR_PTR(-ENOMEM); | |
748 | goto out; | |
749 | } | |
750 | ||
16725b9d SW |
751 | req->r_ino1.ino = CEPH_INO_ROOT; |
752 | req->r_ino1.snap = CEPH_NOSNAP; | |
753 | req->r_started = started; | |
a319bf56 | 754 | req->r_timeout = fsc->client->options->mount_timeout; |
16725b9d SW |
755 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
756 | req->r_num_caps = 2; | |
757 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
758 | if (err == 0) { | |
3c5184ef AV |
759 | struct inode *inode = req->r_target_inode; |
760 | req->r_target_inode = NULL; | |
16725b9d | 761 | dout("open_root_inode success\n"); |
3c5184ef | 762 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 763 | fsc->sb->s_root == NULL) { |
48fde701 | 764 | root = d_make_root(inode); |
3c5184ef | 765 | if (!root) { |
3c5184ef AV |
766 | root = ERR_PTR(-ENOMEM); |
767 | goto out; | |
768 | } | |
774ac21d | 769 | } else { |
1a0a397e | 770 | root = d_obtain_root(inode); |
774ac21d | 771 | } |
d46cfba5 | 772 | ceph_init_dentry(root); |
16725b9d SW |
773 | dout("open_root_inode success, root dentry is %p\n", root); |
774 | } else { | |
775 | root = ERR_PTR(err); | |
776 | } | |
3c5184ef | 777 | out: |
16725b9d SW |
778 | ceph_mdsc_put_request(req); |
779 | return root; | |
780 | } | |
781 | ||
3d14c5d2 YS |
782 | |
783 | ||
784 | ||
16725b9d SW |
785 | /* |
786 | * mount: join the ceph cluster, and open root directory. | |
787 | */ | |
a7f9fb20 | 788 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
789 | const char *path) |
790 | { | |
16725b9d | 791 | int err; |
16725b9d SW |
792 | unsigned long started = jiffies; /* note the start time */ |
793 | struct dentry *root; | |
3d14c5d2 | 794 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
795 | |
796 | dout("mount start\n"); | |
3d14c5d2 | 797 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 798 | |
3d14c5d2 | 799 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
800 | if (err < 0) |
801 | goto out; | |
802 | ||
16725b9d | 803 | dout("mount opening root\n"); |
3d14c5d2 | 804 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
805 | if (IS_ERR(root)) { |
806 | err = PTR_ERR(root); | |
807 | goto out; | |
808 | } | |
3d14c5d2 | 809 | if (fsc->sb->s_root) { |
16725b9d | 810 | dput(root); |
3d14c5d2 YS |
811 | } else { |
812 | fsc->sb->s_root = root; | |
813 | first = 1; | |
814 | ||
815 | err = ceph_fs_debugfs_init(fsc); | |
816 | if (err < 0) | |
817 | goto fail; | |
818 | } | |
16725b9d SW |
819 | |
820 | if (path[0] == 0) { | |
821 | dget(root); | |
822 | } else { | |
823 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 824 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
825 | if (IS_ERR(root)) { |
826 | err = PTR_ERR(root); | |
3d14c5d2 | 827 | goto fail; |
16725b9d SW |
828 | } |
829 | } | |
830 | ||
3d14c5d2 | 831 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 832 | dout("mount success\n"); |
a7f9fb20 AV |
833 | mutex_unlock(&fsc->client->mount_mutex); |
834 | return root; | |
16725b9d SW |
835 | |
836 | out: | |
3d14c5d2 | 837 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 838 | return ERR_PTR(err); |
3d14c5d2 YS |
839 | |
840 | fail: | |
841 | if (first) { | |
842 | dput(fsc->sb->s_root); | |
843 | fsc->sb->s_root = NULL; | |
844 | } | |
845 | goto out; | |
16725b9d SW |
846 | } |
847 | ||
848 | static int ceph_set_super(struct super_block *s, void *data) | |
849 | { | |
3d14c5d2 | 850 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
851 | int ret; |
852 | ||
853 | dout("set_super %p data %p\n", s, data); | |
854 | ||
3d14c5d2 | 855 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
856 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
857 | ||
7221fe4c | 858 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
859 | s->s_fs_info = fsc; |
860 | fsc->sb = s; | |
16725b9d SW |
861 | |
862 | s->s_op = &ceph_super_ops; | |
863 | s->s_export_op = &ceph_export_ops; | |
864 | ||
865 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
866 | ||
867 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
868 | if (ret != 0) | |
869 | goto fail; | |
870 | ||
871 | return ret; | |
872 | ||
873 | fail: | |
874 | s->s_fs_info = NULL; | |
3d14c5d2 | 875 | fsc->sb = NULL; |
16725b9d SW |
876 | return ret; |
877 | } | |
878 | ||
879 | /* | |
880 | * share superblock if same fs AND options | |
881 | */ | |
882 | static int ceph_compare_super(struct super_block *sb, void *data) | |
883 | { | |
3d14c5d2 YS |
884 | struct ceph_fs_client *new = data; |
885 | struct ceph_mount_options *fsopt = new->mount_options; | |
886 | struct ceph_options *opt = new->client->options; | |
887 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
888 | |
889 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
890 | |
891 | if (compare_mount_options(fsopt, opt, other)) { | |
892 | dout("monitor(s)/mount options don't match\n"); | |
893 | return 0; | |
16725b9d | 894 | } |
3d14c5d2 YS |
895 | if ((opt->flags & CEPH_OPT_FSID) && |
896 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
897 | dout("fsid doesn't match\n"); | |
898 | return 0; | |
899 | } | |
900 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
901 | dout("flags differ\n"); |
902 | return 0; | |
903 | } | |
904 | return 1; | |
905 | } | |
906 | ||
907 | /* | |
908 | * construct our own bdi so we can control readahead, etc. | |
909 | */ | |
00d5643e | 910 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 911 | |
3d14c5d2 YS |
912 | static int ceph_register_bdi(struct super_block *sb, |
913 | struct ceph_fs_client *fsc) | |
16725b9d SW |
914 | { |
915 | int err; | |
916 | ||
83817e35 SW |
917 | /* set ra_pages based on rasize mount option? */ |
918 | if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE) | |
3d14c5d2 | 919 | fsc->backing_dev_info.ra_pages = |
83817e35 | 920 | (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1) |
16725b9d | 921 | >> PAGE_SHIFT; |
e9852227 YS |
922 | else |
923 | fsc->backing_dev_info.ra_pages = | |
df0ce26c | 924 | VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE; |
e9852227 | 925 | |
d2cc4dde | 926 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
31e0cf8f | 927 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 928 | if (!err) |
3d14c5d2 | 929 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
930 | return err; |
931 | } | |
932 | ||
a7f9fb20 AV |
933 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
934 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
935 | { |
936 | struct super_block *sb; | |
3d14c5d2 | 937 | struct ceph_fs_client *fsc; |
a7f9fb20 | 938 | struct dentry *res; |
16725b9d SW |
939 | int err; |
940 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 941 | const char *path = NULL; |
3d14c5d2 YS |
942 | struct ceph_mount_options *fsopt = NULL; |
943 | struct ceph_options *opt = NULL; | |
16725b9d | 944 | |
a7f9fb20 | 945 | dout("ceph_mount\n"); |
45195e42 SW |
946 | |
947 | #ifdef CONFIG_CEPH_FS_POSIX_ACL | |
948 | flags |= MS_POSIXACL; | |
949 | #endif | |
3d14c5d2 | 950 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
951 | if (err < 0) { |
952 | res = ERR_PTR(err); | |
6b805185 | 953 | goto out_final; |
a7f9fb20 | 954 | } |
16725b9d SW |
955 | |
956 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
957 | fsc = create_fs_client(fsopt, opt); |
958 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 959 | res = ERR_CAST(fsc); |
259a187a NW |
960 | destroy_mount_options(fsopt); |
961 | ceph_destroy_options(opt); | |
6b805185 SW |
962 | goto out_final; |
963 | } | |
16725b9d | 964 | |
3d14c5d2 | 965 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
966 | if (err < 0) { |
967 | res = ERR_PTR(err); | |
3d14c5d2 | 968 | goto out; |
a7f9fb20 | 969 | } |
3d14c5d2 YS |
970 | |
971 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 972 | compare_super = NULL; |
9249e17f | 973 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 974 | if (IS_ERR(sb)) { |
a7f9fb20 | 975 | res = ERR_CAST(sb); |
16725b9d SW |
976 | goto out; |
977 | } | |
978 | ||
3d14c5d2 YS |
979 | if (ceph_sb_to_client(sb) != fsc) { |
980 | ceph_mdsc_destroy(fsc); | |
981 | destroy_fs_client(fsc); | |
982 | fsc = ceph_sb_to_client(sb); | |
983 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 984 | } else { |
3d14c5d2 YS |
985 | dout("get_sb using new client %p\n", fsc); |
986 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
987 | if (err < 0) { |
988 | res = ERR_PTR(err); | |
16725b9d | 989 | goto out_splat; |
a7f9fb20 | 990 | } |
16725b9d SW |
991 | } |
992 | ||
a7f9fb20 AV |
993 | res = ceph_real_mount(fsc, path); |
994 | if (IS_ERR(res)) | |
16725b9d | 995 | goto out_splat; |
a7f9fb20 | 996 | dout("root %p inode %p ino %llx.%llx\n", res, |
2b0143b5 | 997 | d_inode(res), ceph_vinop(d_inode(res))); |
a7f9fb20 | 998 | return res; |
16725b9d SW |
999 | |
1000 | out_splat: | |
3d14c5d2 | 1001 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 1002 | deactivate_locked_super(sb); |
16725b9d SW |
1003 | goto out_final; |
1004 | ||
1005 | out: | |
3d14c5d2 YS |
1006 | ceph_mdsc_destroy(fsc); |
1007 | destroy_fs_client(fsc); | |
16725b9d | 1008 | out_final: |
a7f9fb20 AV |
1009 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
1010 | return res; | |
16725b9d SW |
1011 | } |
1012 | ||
1013 | static void ceph_kill_sb(struct super_block *s) | |
1014 | { | |
3d14c5d2 | 1015 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
e4d27509 CH |
1016 | dev_t dev = s->s_dev; |
1017 | ||
16725b9d | 1018 | dout("kill_sb %p\n", s); |
e4d27509 | 1019 | |
3d14c5d2 | 1020 | ceph_mdsc_pre_umount(fsc->mdsc); |
e4d27509 | 1021 | generic_shutdown_super(s); |
3d14c5d2 | 1022 | ceph_mdsc_destroy(fsc); |
e4d27509 | 1023 | |
3d14c5d2 | 1024 | destroy_fs_client(fsc); |
e4d27509 | 1025 | free_anon_bdev(dev); |
16725b9d SW |
1026 | } |
1027 | ||
1028 | static struct file_system_type ceph_fs_type = { | |
1029 | .owner = THIS_MODULE, | |
1030 | .name = "ceph", | |
a7f9fb20 | 1031 | .mount = ceph_mount, |
16725b9d SW |
1032 | .kill_sb = ceph_kill_sb, |
1033 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1034 | }; | |
7f78e035 | 1035 | MODULE_ALIAS_FS("ceph"); |
16725b9d | 1036 | |
16725b9d SW |
1037 | static int __init init_ceph(void) |
1038 | { | |
3d14c5d2 | 1039 | int ret = init_caches(); |
16725b9d | 1040 | if (ret) |
3d14c5d2 | 1041 | goto out; |
16725b9d | 1042 | |
eb13e832 | 1043 | ceph_flock_init(); |
3ce6cd12 | 1044 | ceph_xattr_init(); |
16725b9d SW |
1045 | ret = register_filesystem(&ceph_fs_type); |
1046 | if (ret) | |
34b759b4 | 1047 | goto out_xattr; |
16725b9d | 1048 | |
3d14c5d2 YS |
1049 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1050 | ||
16725b9d SW |
1051 | return 0; |
1052 | ||
97c85a82 | 1053 | out_xattr: |
3ce6cd12 | 1054 | ceph_xattr_exit(); |
16725b9d | 1055 | destroy_caches(); |
16725b9d SW |
1056 | out: |
1057 | return ret; | |
1058 | } | |
1059 | ||
1060 | static void __exit exit_ceph(void) | |
1061 | { | |
1062 | dout("exit_ceph\n"); | |
1063 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 1064 | ceph_xattr_exit(); |
16725b9d | 1065 | destroy_caches(); |
16725b9d SW |
1066 | } |
1067 | ||
1068 | module_init(init_ceph); | |
1069 | module_exit(exit_ceph); | |
1070 | ||
1071 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1072 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1073 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1074 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1075 | MODULE_LICENSE("GPL"); |