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); |
5dfc589a SW |
43 | |
44 | /* | |
45 | * ensure we release the bdi before put_anon_super releases | |
46 | * the device name. | |
47 | */ | |
3d14c5d2 YS |
48 | if (s->s_bdi == &fsc->backing_dev_info) { |
49 | bdi_unregister(&fsc->backing_dev_info); | |
5dfc589a SW |
50 | s->s_bdi = NULL; |
51 | } | |
52 | ||
16725b9d SW |
53 | return; |
54 | } | |
55 | ||
56 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
57 | { | |
3d14c5d2 YS |
58 | struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode); |
59 | struct ceph_monmap *monmap = fsc->client->monc.monmap; | |
16725b9d SW |
60 | struct ceph_statfs st; |
61 | u64 fsid; | |
62 | int err; | |
63 | ||
64 | dout("statfs\n"); | |
3d14c5d2 | 65 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
16725b9d SW |
66 | if (err < 0) |
67 | return err; | |
68 | ||
69 | /* fill in kstatfs */ | |
70 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
71 | ||
72 | /* | |
73 | * express utilization in terms of large blocks to avoid | |
74 | * overflow on 32-bit machines. | |
92a49fb0 SW |
75 | * |
76 | * NOTE: for the time being, we make bsize == frsize to humor | |
77 | * not-yet-ancient versions of glibc that are broken. | |
78 | * Someday, we will probably want to report a real block | |
79 | * size... whatever that may mean for a network file system! | |
16725b9d SW |
80 | */ |
81 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
92a49fb0 | 82 | buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; |
16725b9d | 83 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); |
8f04d422 | 84 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
16725b9d SW |
85 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
86 | ||
87 | buf->f_files = le64_to_cpu(st.num_objects); | |
88 | buf->f_ffree = -1; | |
558d3499 | 89 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
90 | |
91 | /* leave fsid little-endian, regardless of host endianness */ | |
92 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
93 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
94 | buf->f_fsid.val[1] = fsid >> 32; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | ||
2d9c98ae | 100 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 101 | { |
3d14c5d2 | 102 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
103 | |
104 | if (!wait) { | |
105 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 106 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
107 | dout("sync_fs (non-blocking) done\n"); |
108 | return 0; | |
109 | } | |
110 | ||
111 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
112 | ceph_osdc_sync(&fsc->client->osdc); |
113 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 114 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
115 | return 0; |
116 | } | |
117 | ||
16725b9d SW |
118 | /* |
119 | * mount options | |
120 | */ | |
121 | enum { | |
16725b9d SW |
122 | Opt_wsize, |
123 | Opt_rsize, | |
83817e35 | 124 | Opt_rasize, |
16725b9d SW |
125 | Opt_caps_wanted_delay_min, |
126 | Opt_caps_wanted_delay_max, | |
6e19a16e | 127 | Opt_cap_release_safety, |
16725b9d | 128 | Opt_readdir_max_entries, |
23804d91 | 129 | Opt_readdir_max_bytes, |
2baba250 | 130 | Opt_congestion_kb, |
e53c2fe0 | 131 | Opt_last_int, |
16725b9d SW |
132 | /* int args above */ |
133 | Opt_snapdirname, | |
e53c2fe0 | 134 | Opt_last_string, |
16725b9d | 135 | /* string args above */ |
16725b9d SW |
136 | Opt_dirstat, |
137 | Opt_nodirstat, | |
138 | Opt_rbytes, | |
139 | Opt_norbytes, | |
cffaba15 | 140 | Opt_asyncreaddir, |
16725b9d | 141 | Opt_noasyncreaddir, |
a40dc6cc SW |
142 | Opt_dcache, |
143 | Opt_nodcache, | |
ad1fee96 | 144 | Opt_ino32, |
cffaba15 | 145 | Opt_noino32, |
99ccbd22 MT |
146 | Opt_fscache, |
147 | Opt_nofscache | |
16725b9d SW |
148 | }; |
149 | ||
3d14c5d2 | 150 | static match_table_t fsopt_tokens = { |
16725b9d SW |
151 | {Opt_wsize, "wsize=%d"}, |
152 | {Opt_rsize, "rsize=%d"}, | |
83817e35 | 153 | {Opt_rasize, "rasize=%d"}, |
16725b9d SW |
154 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
155 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 156 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 157 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 158 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 159 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
160 | /* int args above */ |
161 | {Opt_snapdirname, "snapdirname=%s"}, | |
16725b9d | 162 | /* string args above */ |
16725b9d SW |
163 | {Opt_dirstat, "dirstat"}, |
164 | {Opt_nodirstat, "nodirstat"}, | |
165 | {Opt_rbytes, "rbytes"}, | |
166 | {Opt_norbytes, "norbytes"}, | |
cffaba15 | 167 | {Opt_asyncreaddir, "asyncreaddir"}, |
16725b9d | 168 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
a40dc6cc SW |
169 | {Opt_dcache, "dcache"}, |
170 | {Opt_nodcache, "nodcache"}, | |
ad1fee96 | 171 | {Opt_ino32, "ino32"}, |
cffaba15 | 172 | {Opt_noino32, "noino32"}, |
99ccbd22 MT |
173 | {Opt_fscache, "fsc"}, |
174 | {Opt_nofscache, "nofsc"}, | |
16725b9d SW |
175 | {-1, NULL} |
176 | }; | |
177 | ||
3d14c5d2 | 178 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 179 | { |
3d14c5d2 YS |
180 | struct ceph_mount_options *fsopt = private; |
181 | substring_t argstr[MAX_OPT_ARGS]; | |
182 | int token, intval, ret; | |
183 | ||
184 | token = match_token((char *)c, fsopt_tokens, argstr); | |
185 | if (token < 0) | |
186 | return -EINVAL; | |
187 | ||
188 | if (token < Opt_last_int) { | |
189 | ret = match_int(&argstr[0], &intval); | |
190 | if (ret < 0) { | |
191 | pr_err("bad mount option arg (not int) " | |
192 | "at '%s'\n", c); | |
193 | return ret; | |
c309f0ab | 194 | } |
3d14c5d2 YS |
195 | dout("got int token %d val %d\n", token, intval); |
196 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
197 | dout("got string token %d val %s\n", token, | |
198 | argstr[0].from); | |
199 | } else { | |
200 | dout("got token %d\n", token); | |
c309f0ab SW |
201 | } |
202 | ||
3d14c5d2 YS |
203 | switch (token) { |
204 | case Opt_snapdirname: | |
205 | kfree(fsopt->snapdir_name); | |
206 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
207 | argstr[0].to-argstr[0].from, | |
208 | GFP_KERNEL); | |
209 | if (!fsopt->snapdir_name) | |
210 | return -ENOMEM; | |
211 | break; | |
212 | ||
213 | /* misc */ | |
214 | case Opt_wsize: | |
215 | fsopt->wsize = intval; | |
216 | break; | |
217 | case Opt_rsize: | |
218 | fsopt->rsize = intval; | |
219 | break; | |
83817e35 SW |
220 | case Opt_rasize: |
221 | fsopt->rasize = intval; | |
222 | break; | |
3d14c5d2 YS |
223 | case Opt_caps_wanted_delay_min: |
224 | fsopt->caps_wanted_delay_min = intval; | |
225 | break; | |
226 | case Opt_caps_wanted_delay_max: | |
227 | fsopt->caps_wanted_delay_max = intval; | |
228 | break; | |
229 | case Opt_readdir_max_entries: | |
230 | fsopt->max_readdir = intval; | |
231 | break; | |
232 | case Opt_readdir_max_bytes: | |
233 | fsopt->max_readdir_bytes = intval; | |
234 | break; | |
235 | case Opt_congestion_kb: | |
236 | fsopt->congestion_kb = intval; | |
237 | break; | |
238 | case Opt_dirstat: | |
239 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
240 | break; | |
241 | case Opt_nodirstat: | |
242 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
243 | break; | |
244 | case Opt_rbytes: | |
245 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
246 | break; | |
247 | case Opt_norbytes: | |
248 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
249 | break; | |
cffaba15 AE |
250 | case Opt_asyncreaddir: |
251 | fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
252 | break; | |
3d14c5d2 YS |
253 | case Opt_noasyncreaddir: |
254 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
255 | break; | |
a40dc6cc SW |
256 | case Opt_dcache: |
257 | fsopt->flags |= CEPH_MOUNT_OPT_DCACHE; | |
258 | break; | |
259 | case Opt_nodcache: | |
260 | fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE; | |
261 | break; | |
ad1fee96 YS |
262 | case Opt_ino32: |
263 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
264 | break; | |
cffaba15 AE |
265 | case Opt_noino32: |
266 | fsopt->flags &= ~CEPH_MOUNT_OPT_INO32; | |
267 | break; | |
99ccbd22 MT |
268 | case Opt_fscache: |
269 | fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; | |
270 | break; | |
271 | case Opt_nofscache: | |
272 | fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; | |
273 | break; | |
3d14c5d2 YS |
274 | default: |
275 | BUG_ON(token); | |
276 | } | |
277 | return 0; | |
c309f0ab | 278 | } |
16725b9d | 279 | |
3d14c5d2 | 280 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 281 | { |
3d14c5d2 YS |
282 | dout("destroy_mount_options %p\n", args); |
283 | kfree(args->snapdir_name); | |
284 | kfree(args); | |
285 | } | |
16725b9d | 286 | |
3d14c5d2 YS |
287 | static int strcmp_null(const char *s1, const char *s2) |
288 | { | |
289 | if (!s1 && !s2) | |
290 | return 0; | |
291 | if (s1 && !s2) | |
292 | return -1; | |
293 | if (!s1 && s2) | |
294 | return 1; | |
295 | return strcmp(s1, s2); | |
296 | } | |
16725b9d | 297 | |
3d14c5d2 YS |
298 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
299 | struct ceph_options *new_opt, | |
300 | struct ceph_fs_client *fsc) | |
301 | { | |
302 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
303 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
304 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
305 | int ret; | |
16725b9d | 306 | |
3d14c5d2 YS |
307 | ret = memcmp(fsopt1, fsopt2, ofs); |
308 | if (ret) | |
309 | return ret; | |
310 | ||
311 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
312 | if (ret) | |
313 | return ret; | |
314 | ||
315 | return ceph_compare_options(new_opt, fsc->client); | |
316 | } | |
317 | ||
318 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
319 | struct ceph_options **popt, | |
320 | int flags, char *options, | |
321 | const char *dev_name, | |
322 | const char **path) | |
323 | { | |
324 | struct ceph_mount_options *fsopt; | |
325 | const char *dev_name_end; | |
c98f533c AE |
326 | int err; |
327 | ||
328 | if (!dev_name || !*dev_name) | |
329 | return -EINVAL; | |
3d14c5d2 YS |
330 | |
331 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
332 | if (!fsopt) | |
333 | return -ENOMEM; | |
334 | ||
335 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
336 | ||
80db8bea NW |
337 | fsopt->sb_flags = flags; |
338 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
3d14c5d2 | 339 | |
80db8bea NW |
340 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
341 | fsopt->rasize = CEPH_RASIZE_DEFAULT; | |
342 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); | |
50aac4fe SW |
343 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
344 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
80db8bea NW |
345 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
346 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
347 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
348 | fsopt->congestion_kb = default_congestion_kb(); | |
349 | ||
c98f533c AE |
350 | /* |
351 | * Distinguish the server list from the path in "dev_name". | |
352 | * Internally we do not include the leading '/' in the path. | |
353 | * | |
354 | * "dev_name" will look like: | |
355 | * <server_spec>[,<server_spec>...]:[<path>] | |
356 | * where | |
357 | * <server_spec> is <ip>[:<port>] | |
358 | * <path> is optional, but if present must begin with '/' | |
359 | */ | |
360 | dev_name_end = strchr(dev_name, '/'); | |
361 | if (dev_name_end) { | |
362 | /* skip over leading '/' for path */ | |
363 | *path = dev_name_end + 1; | |
364 | } else { | |
365 | /* path is empty */ | |
366 | dev_name_end = dev_name + strlen(dev_name); | |
367 | *path = dev_name_end; | |
368 | } | |
80db8bea | 369 | err = -EINVAL; |
c98f533c | 370 | dev_name_end--; /* back up to ':' separator */ |
54464296 | 371 | if (dev_name_end < dev_name || *dev_name_end != ':') { |
c98f533c | 372 | pr_err("device name is missing path (no : separator in %s)\n", |
80db8bea NW |
373 | dev_name); |
374 | goto out; | |
375 | } | |
3d14c5d2 | 376 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); |
16725b9d SW |
377 | dout("server path '%s'\n", *path); |
378 | ||
ee57741c | 379 | *popt = ceph_parse_options(options, dev_name, dev_name_end, |
3d14c5d2 | 380 | parse_fsopt_token, (void *)fsopt); |
ee57741c AE |
381 | if (IS_ERR(*popt)) { |
382 | err = PTR_ERR(*popt); | |
3d14c5d2 | 383 | goto out; |
ee57741c | 384 | } |
3d14c5d2 YS |
385 | |
386 | /* success */ | |
387 | *pfsopt = fsopt; | |
388 | return 0; | |
16725b9d | 389 | |
7b813c46 | 390 | out: |
3d14c5d2 YS |
391 | destroy_mount_options(fsopt); |
392 | return err; | |
16725b9d SW |
393 | } |
394 | ||
3d14c5d2 YS |
395 | /** |
396 | * ceph_show_options - Show mount options in /proc/mounts | |
397 | * @m: seq_file to write to | |
34c80b1d | 398 | * @root: root of that (sub)tree |
3d14c5d2 | 399 | */ |
34c80b1d | 400 | static int ceph_show_options(struct seq_file *m, struct dentry *root) |
16725b9d | 401 | { |
34c80b1d | 402 | struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb); |
3d14c5d2 YS |
403 | struct ceph_mount_options *fsopt = fsc->mount_options; |
404 | struct ceph_options *opt = fsc->client->options; | |
405 | ||
406 | if (opt->flags & CEPH_OPT_FSID) | |
407 | seq_printf(m, ",fsid=%pU", &opt->fsid); | |
408 | if (opt->flags & CEPH_OPT_NOSHARE) | |
409 | seq_puts(m, ",noshare"); | |
410 | if (opt->flags & CEPH_OPT_NOCRC) | |
411 | seq_puts(m, ",nocrc"); | |
412 | ||
413 | if (opt->name) | |
414 | seq_printf(m, ",name=%s", opt->name); | |
8323c3aa | 415 | if (opt->key) |
3d14c5d2 YS |
416 | seq_puts(m, ",secret=<hidden>"); |
417 | ||
418 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
419 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); | |
420 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
421 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); | |
3d14c5d2 YS |
422 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) |
423 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
424 | opt->osd_keepalive_timeout); | |
425 | ||
426 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
427 | seq_puts(m, ",dirstat"); | |
428 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) | |
429 | seq_puts(m, ",norbytes"); | |
430 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) | |
431 | seq_puts(m, ",noasyncreaddir"); | |
a40dc6cc SW |
432 | if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE) |
433 | seq_puts(m, ",dcache"); | |
434 | else | |
435 | seq_puts(m, ",nodcache"); | |
99ccbd22 MT |
436 | if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) |
437 | seq_puts(m, ",fsc"); | |
438 | else | |
439 | seq_puts(m, ",nofsc"); | |
3d14c5d2 YS |
440 | |
441 | if (fsopt->wsize) | |
442 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 443 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 | 444 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
83817e35 | 445 | if (fsopt->rasize != CEPH_RASIZE_DEFAULT) |
2151937d | 446 | seq_printf(m, ",rasize=%d", fsopt->rasize); |
3d14c5d2 YS |
447 | if (fsopt->congestion_kb != default_congestion_kb()) |
448 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
449 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
450 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
451 | fsopt->caps_wanted_delay_min); | |
452 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
453 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
454 | fsopt->caps_wanted_delay_max); | |
455 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
456 | seq_printf(m, ",cap_release_safety=%d", | |
457 | fsopt->cap_release_safety); | |
458 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
459 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
460 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
461 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
462 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
463 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); | |
464 | return 0; | |
16725b9d SW |
465 | } |
466 | ||
467 | /* | |
3d14c5d2 YS |
468 | * handle any mon messages the standard library doesn't understand. |
469 | * return error if we don't either. | |
16725b9d | 470 | */ |
3d14c5d2 | 471 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 472 | { |
3d14c5d2 YS |
473 | struct ceph_fs_client *fsc = client->private; |
474 | int type = le16_to_cpu(msg->hdr.type); | |
475 | ||
476 | switch (type) { | |
477 | case CEPH_MSG_MDS_MAP: | |
478 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
479 | return 0; | |
480 | ||
481 | default: | |
482 | return -1; | |
483 | } | |
484 | } | |
485 | ||
486 | /* | |
487 | * create a new fs client | |
488 | */ | |
0c6d4b4e | 489 | static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, |
3d14c5d2 YS |
490 | struct ceph_options *opt) |
491 | { | |
492 | struct ceph_fs_client *fsc; | |
12b4629a | 493 | const u64 supported_features = |
6ab00d46 SW |
494 | CEPH_FEATURE_FLOCK | |
495 | CEPH_FEATURE_DIRLAYOUTHASH; | |
12b4629a | 496 | const u64 required_features = 0; |
3bf53337 AE |
497 | int page_count; |
498 | size_t size; | |
16725b9d SW |
499 | int err = -ENOMEM; |
500 | ||
3d14c5d2 YS |
501 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
502 | if (!fsc) | |
16725b9d SW |
503 | return ERR_PTR(-ENOMEM); |
504 | ||
6ab00d46 SW |
505 | fsc->client = ceph_create_client(opt, fsc, supported_features, |
506 | required_features); | |
3d14c5d2 YS |
507 | if (IS_ERR(fsc->client)) { |
508 | err = PTR_ERR(fsc->client); | |
509 | goto fail; | |
510 | } | |
511 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
3d14c5d2 | 512 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 513 | |
3d14c5d2 | 514 | fsc->mount_options = fsopt; |
16725b9d | 515 | |
3d14c5d2 YS |
516 | fsc->sb = NULL; |
517 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 518 | |
3d14c5d2 | 519 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 520 | |
3d14c5d2 | 521 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 522 | if (err < 0) |
3d14c5d2 | 523 | goto fail_client; |
859e7b14 | 524 | |
16725b9d | 525 | err = -ENOMEM; |
01e6acc4 TH |
526 | /* |
527 | * The number of concurrent works can be high but they don't need | |
528 | * to be processed in parallel, limit concurrency. | |
529 | */ | |
530 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 531 | if (fsc->wb_wq == NULL) |
859e7b14 | 532 | goto fail_bdi; |
01e6acc4 | 533 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 534 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 535 | goto fail_wb_wq; |
01e6acc4 | 536 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 537 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
538 | goto fail_pg_inv_wq; |
539 | ||
b9bfb93c SW |
540 | /* set up mempools */ |
541 | err = -ENOMEM; | |
3bf53337 AE |
542 | page_count = fsc->mount_options->wsize >> PAGE_CACHE_SHIFT; |
543 | size = sizeof (struct page *) * (page_count ? page_count : 1); | |
544 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size); | |
3d14c5d2 | 545 | if (!fsc->wb_pagevec_pool) |
b9bfb93c SW |
546 | goto fail_trunc_wq; |
547 | ||
99ccbd22 MT |
548 | /* setup fscache */ |
549 | if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) && | |
550 | (ceph_fscache_register_fs(fsc) != 0)) | |
551 | goto fail_fscache; | |
552 | ||
85ccce43 | 553 | /* caps */ |
3d14c5d2 YS |
554 | fsc->min_caps = fsopt->max_readdir; |
555 | ||
556 | return fsc; | |
b9bfb93c | 557 | |
99ccbd22 MT |
558 | fail_fscache: |
559 | ceph_fscache_unregister_fs(fsc); | |
16725b9d | 560 | fail_trunc_wq: |
3d14c5d2 | 561 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 562 | fail_pg_inv_wq: |
3d14c5d2 | 563 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 564 | fail_wb_wq: |
3d14c5d2 | 565 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 566 | fail_bdi: |
3d14c5d2 YS |
567 | bdi_destroy(&fsc->backing_dev_info); |
568 | fail_client: | |
569 | ceph_destroy_client(fsc->client); | |
16725b9d | 570 | fail: |
3d14c5d2 | 571 | kfree(fsc); |
16725b9d SW |
572 | return ERR_PTR(err); |
573 | } | |
574 | ||
0c6d4b4e | 575 | static void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 576 | { |
3d14c5d2 | 577 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 578 | |
99ccbd22 MT |
579 | ceph_fscache_unregister_fs(fsc); |
580 | ||
3d14c5d2 YS |
581 | destroy_workqueue(fsc->wb_wq); |
582 | destroy_workqueue(fsc->pg_inv_wq); | |
583 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 584 | |
3d14c5d2 | 585 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 586 | |
3d14c5d2 | 587 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 588 | |
3d14c5d2 | 589 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 590 | |
3d14c5d2 | 591 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 592 | |
3d14c5d2 | 593 | ceph_destroy_client(fsc->client); |
16725b9d | 594 | |
3d14c5d2 YS |
595 | kfree(fsc); |
596 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
597 | } |
598 | ||
0743304d | 599 | /* |
3d14c5d2 | 600 | * caches |
0743304d | 601 | */ |
3d14c5d2 YS |
602 | struct kmem_cache *ceph_inode_cachep; |
603 | struct kmem_cache *ceph_cap_cachep; | |
604 | struct kmem_cache *ceph_dentry_cachep; | |
605 | struct kmem_cache *ceph_file_cachep; | |
606 | ||
607 | static void ceph_inode_init_once(void *foo) | |
0743304d | 608 | { |
3d14c5d2 YS |
609 | struct ceph_inode_info *ci = foo; |
610 | inode_init_once(&ci->vfs_inode); | |
611 | } | |
612 | ||
613 | static int __init init_caches(void) | |
614 | { | |
99ccbd22 MT |
615 | int error = -ENOMEM; |
616 | ||
3d14c5d2 YS |
617 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", |
618 | sizeof(struct ceph_inode_info), | |
619 | __alignof__(struct ceph_inode_info), | |
620 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
621 | ceph_inode_init_once); | |
622 | if (ceph_inode_cachep == NULL) | |
623 | return -ENOMEM; | |
624 | ||
625 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
626 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
627 | if (ceph_cap_cachep == NULL) | |
628 | goto bad_cap; | |
629 | ||
630 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
631 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
632 | if (ceph_dentry_cachep == NULL) | |
633 | goto bad_dentry; | |
634 | ||
635 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
636 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
637 | if (ceph_file_cachep == NULL) | |
638 | goto bad_file; | |
639 | ||
99ccbd22 MT |
640 | if ((error = ceph_fscache_register())) |
641 | goto bad_file; | |
3d14c5d2 | 642 | |
99ccbd22 | 643 | return 0; |
3d14c5d2 YS |
644 | bad_file: |
645 | kmem_cache_destroy(ceph_dentry_cachep); | |
646 | bad_dentry: | |
647 | kmem_cache_destroy(ceph_cap_cachep); | |
648 | bad_cap: | |
649 | kmem_cache_destroy(ceph_inode_cachep); | |
99ccbd22 | 650 | return error; |
0743304d SW |
651 | } |
652 | ||
3d14c5d2 YS |
653 | static void destroy_caches(void) |
654 | { | |
8c0a8537 KS |
655 | /* |
656 | * Make sure all delayed rcu free inodes are flushed before we | |
657 | * destroy cache. | |
658 | */ | |
659 | rcu_barrier(); | |
99ccbd22 | 660 | |
3d14c5d2 YS |
661 | kmem_cache_destroy(ceph_inode_cachep); |
662 | kmem_cache_destroy(ceph_cap_cachep); | |
663 | kmem_cache_destroy(ceph_dentry_cachep); | |
664 | kmem_cache_destroy(ceph_file_cachep); | |
99ccbd22 MT |
665 | |
666 | ceph_fscache_unregister(); | |
3d14c5d2 YS |
667 | } |
668 | ||
669 | ||
16725b9d | 670 | /* |
3d14c5d2 YS |
671 | * ceph_umount_begin - initiate forced umount. Tear down down the |
672 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 673 | */ |
3d14c5d2 | 674 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 675 | { |
3d14c5d2 YS |
676 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
677 | ||
678 | dout("ceph_umount_begin - starting forced umount\n"); | |
679 | if (!fsc) | |
680 | return; | |
681 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
682 | return; | |
16725b9d SW |
683 | } |
684 | ||
3d14c5d2 YS |
685 | static const struct super_operations ceph_super_ops = { |
686 | .alloc_inode = ceph_alloc_inode, | |
687 | .destroy_inode = ceph_destroy_inode, | |
688 | .write_inode = ceph_write_inode, | |
9f12bd11 | 689 | .drop_inode = ceph_drop_inode, |
3d14c5d2 YS |
690 | .sync_fs = ceph_sync_fs, |
691 | .put_super = ceph_put_super, | |
692 | .show_options = ceph_show_options, | |
693 | .statfs = ceph_statfs, | |
694 | .umount_begin = ceph_umount_begin, | |
695 | }; | |
696 | ||
16725b9d SW |
697 | /* |
698 | * Bootstrap mount by opening the root directory. Note the mount | |
699 | * @started time from caller, and time out if this takes too long. | |
700 | */ | |
3d14c5d2 | 701 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
702 | const char *path, |
703 | unsigned long started) | |
704 | { | |
3d14c5d2 | 705 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
706 | struct ceph_mds_request *req = NULL; |
707 | int err; | |
708 | struct dentry *root; | |
709 | ||
710 | /* open dir */ | |
711 | dout("open_root_inode opening '%s'\n", path); | |
712 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
713 | if (IS_ERR(req)) | |
7e34bc52 | 714 | return ERR_CAST(req); |
16725b9d SW |
715 | req->r_path1 = kstrdup(path, GFP_NOFS); |
716 | req->r_ino1.ino = CEPH_INO_ROOT; | |
717 | req->r_ino1.snap = CEPH_NOSNAP; | |
718 | req->r_started = started; | |
3d14c5d2 | 719 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
720 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
721 | req->r_num_caps = 2; | |
722 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
723 | if (err == 0) { | |
3c5184ef AV |
724 | struct inode *inode = req->r_target_inode; |
725 | req->r_target_inode = NULL; | |
16725b9d | 726 | dout("open_root_inode success\n"); |
3c5184ef | 727 | if (ceph_ino(inode) == CEPH_INO_ROOT && |
774ac21d | 728 | fsc->sb->s_root == NULL) { |
48fde701 | 729 | root = d_make_root(inode); |
3c5184ef | 730 | if (!root) { |
3c5184ef AV |
731 | root = ERR_PTR(-ENOMEM); |
732 | goto out; | |
733 | } | |
774ac21d | 734 | } else { |
3c5184ef | 735 | root = d_obtain_alias(inode); |
774ac21d | 736 | } |
d46cfba5 | 737 | ceph_init_dentry(root); |
16725b9d SW |
738 | dout("open_root_inode success, root dentry is %p\n", root); |
739 | } else { | |
740 | root = ERR_PTR(err); | |
741 | } | |
3c5184ef | 742 | out: |
16725b9d SW |
743 | ceph_mdsc_put_request(req); |
744 | return root; | |
745 | } | |
746 | ||
3d14c5d2 YS |
747 | |
748 | ||
749 | ||
16725b9d SW |
750 | /* |
751 | * mount: join the ceph cluster, and open root directory. | |
752 | */ | |
a7f9fb20 | 753 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
754 | const char *path) |
755 | { | |
16725b9d | 756 | int err; |
16725b9d SW |
757 | unsigned long started = jiffies; /* note the start time */ |
758 | struct dentry *root; | |
3d14c5d2 | 759 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
760 | |
761 | dout("mount start\n"); | |
3d14c5d2 | 762 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 763 | |
3d14c5d2 | 764 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
765 | if (err < 0) |
766 | goto out; | |
767 | ||
16725b9d | 768 | dout("mount opening root\n"); |
3d14c5d2 | 769 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
770 | if (IS_ERR(root)) { |
771 | err = PTR_ERR(root); | |
772 | goto out; | |
773 | } | |
3d14c5d2 | 774 | if (fsc->sb->s_root) { |
16725b9d | 775 | dput(root); |
3d14c5d2 YS |
776 | } else { |
777 | fsc->sb->s_root = root; | |
778 | first = 1; | |
779 | ||
780 | err = ceph_fs_debugfs_init(fsc); | |
781 | if (err < 0) | |
782 | goto fail; | |
783 | } | |
16725b9d SW |
784 | |
785 | if (path[0] == 0) { | |
786 | dget(root); | |
787 | } else { | |
788 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 789 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
790 | if (IS_ERR(root)) { |
791 | err = PTR_ERR(root); | |
3d14c5d2 | 792 | goto fail; |
16725b9d SW |
793 | } |
794 | } | |
795 | ||
3d14c5d2 | 796 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 797 | dout("mount success\n"); |
a7f9fb20 AV |
798 | mutex_unlock(&fsc->client->mount_mutex); |
799 | return root; | |
16725b9d SW |
800 | |
801 | out: | |
3d14c5d2 | 802 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 803 | return ERR_PTR(err); |
3d14c5d2 YS |
804 | |
805 | fail: | |
806 | if (first) { | |
807 | dput(fsc->sb->s_root); | |
808 | fsc->sb->s_root = NULL; | |
809 | } | |
810 | goto out; | |
16725b9d SW |
811 | } |
812 | ||
813 | static int ceph_set_super(struct super_block *s, void *data) | |
814 | { | |
3d14c5d2 | 815 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
816 | int ret; |
817 | ||
818 | dout("set_super %p data %p\n", s, data); | |
819 | ||
3d14c5d2 | 820 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d | 821 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
7221fe4c GZ |
822 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
823 | s->s_flags |= MS_POSIXACL; | |
824 | #endif | |
16725b9d | 825 | |
7221fe4c | 826 | s->s_xattr = ceph_xattr_handlers; |
3d14c5d2 YS |
827 | s->s_fs_info = fsc; |
828 | fsc->sb = s; | |
16725b9d SW |
829 | |
830 | s->s_op = &ceph_super_ops; | |
831 | s->s_export_op = &ceph_export_ops; | |
832 | ||
833 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
834 | ||
835 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
836 | if (ret != 0) | |
837 | goto fail; | |
838 | ||
839 | return ret; | |
840 | ||
841 | fail: | |
842 | s->s_fs_info = NULL; | |
3d14c5d2 | 843 | fsc->sb = NULL; |
16725b9d SW |
844 | return ret; |
845 | } | |
846 | ||
847 | /* | |
848 | * share superblock if same fs AND options | |
849 | */ | |
850 | static int ceph_compare_super(struct super_block *sb, void *data) | |
851 | { | |
3d14c5d2 YS |
852 | struct ceph_fs_client *new = data; |
853 | struct ceph_mount_options *fsopt = new->mount_options; | |
854 | struct ceph_options *opt = new->client->options; | |
855 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
856 | |
857 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
858 | |
859 | if (compare_mount_options(fsopt, opt, other)) { | |
860 | dout("monitor(s)/mount options don't match\n"); | |
861 | return 0; | |
16725b9d | 862 | } |
3d14c5d2 YS |
863 | if ((opt->flags & CEPH_OPT_FSID) && |
864 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
865 | dout("fsid doesn't match\n"); | |
866 | return 0; | |
867 | } | |
868 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
869 | dout("flags differ\n"); |
870 | return 0; | |
871 | } | |
872 | return 1; | |
873 | } | |
874 | ||
875 | /* | |
876 | * construct our own bdi so we can control readahead, etc. | |
877 | */ | |
00d5643e | 878 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 879 | |
3d14c5d2 YS |
880 | static int ceph_register_bdi(struct super_block *sb, |
881 | struct ceph_fs_client *fsc) | |
16725b9d SW |
882 | { |
883 | int err; | |
884 | ||
83817e35 SW |
885 | /* set ra_pages based on rasize mount option? */ |
886 | if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE) | |
3d14c5d2 | 887 | fsc->backing_dev_info.ra_pages = |
83817e35 | 888 | (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1) |
16725b9d | 889 | >> PAGE_SHIFT; |
e9852227 YS |
890 | else |
891 | fsc->backing_dev_info.ra_pages = | |
892 | default_backing_dev_info.ra_pages; | |
893 | ||
d2cc4dde | 894 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", |
31e0cf8f | 895 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 896 | if (!err) |
3d14c5d2 | 897 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
898 | return err; |
899 | } | |
900 | ||
a7f9fb20 AV |
901 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
902 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
903 | { |
904 | struct super_block *sb; | |
3d14c5d2 | 905 | struct ceph_fs_client *fsc; |
a7f9fb20 | 906 | struct dentry *res; |
16725b9d SW |
907 | int err; |
908 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 909 | const char *path = NULL; |
3d14c5d2 YS |
910 | struct ceph_mount_options *fsopt = NULL; |
911 | struct ceph_options *opt = NULL; | |
16725b9d | 912 | |
a7f9fb20 | 913 | dout("ceph_mount\n"); |
3d14c5d2 | 914 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
915 | if (err < 0) { |
916 | res = ERR_PTR(err); | |
6b805185 | 917 | goto out_final; |
a7f9fb20 | 918 | } |
16725b9d SW |
919 | |
920 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
921 | fsc = create_fs_client(fsopt, opt); |
922 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 923 | res = ERR_CAST(fsc); |
259a187a NW |
924 | destroy_mount_options(fsopt); |
925 | ceph_destroy_options(opt); | |
6b805185 SW |
926 | goto out_final; |
927 | } | |
16725b9d | 928 | |
3d14c5d2 | 929 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
930 | if (err < 0) { |
931 | res = ERR_PTR(err); | |
3d14c5d2 | 932 | goto out; |
a7f9fb20 | 933 | } |
3d14c5d2 YS |
934 | |
935 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 936 | compare_super = NULL; |
9249e17f | 937 | sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc); |
16725b9d | 938 | if (IS_ERR(sb)) { |
a7f9fb20 | 939 | res = ERR_CAST(sb); |
16725b9d SW |
940 | goto out; |
941 | } | |
942 | ||
3d14c5d2 YS |
943 | if (ceph_sb_to_client(sb) != fsc) { |
944 | ceph_mdsc_destroy(fsc); | |
945 | destroy_fs_client(fsc); | |
946 | fsc = ceph_sb_to_client(sb); | |
947 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 948 | } else { |
3d14c5d2 YS |
949 | dout("get_sb using new client %p\n", fsc); |
950 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
951 | if (err < 0) { |
952 | res = ERR_PTR(err); | |
16725b9d | 953 | goto out_splat; |
a7f9fb20 | 954 | } |
16725b9d SW |
955 | } |
956 | ||
a7f9fb20 AV |
957 | res = ceph_real_mount(fsc, path); |
958 | if (IS_ERR(res)) | |
16725b9d | 959 | goto out_splat; |
a7f9fb20 AV |
960 | dout("root %p inode %p ino %llx.%llx\n", res, |
961 | res->d_inode, ceph_vinop(res->d_inode)); | |
962 | return res; | |
16725b9d SW |
963 | |
964 | out_splat: | |
3d14c5d2 | 965 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 966 | deactivate_locked_super(sb); |
16725b9d SW |
967 | goto out_final; |
968 | ||
969 | out: | |
3d14c5d2 YS |
970 | ceph_mdsc_destroy(fsc); |
971 | destroy_fs_client(fsc); | |
16725b9d | 972 | out_final: |
a7f9fb20 AV |
973 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
974 | return res; | |
16725b9d SW |
975 | } |
976 | ||
977 | static void ceph_kill_sb(struct super_block *s) | |
978 | { | |
3d14c5d2 | 979 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 980 | dout("kill_sb %p\n", s); |
3d14c5d2 | 981 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 982 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
983 | ceph_mdsc_destroy(fsc); |
984 | destroy_fs_client(fsc); | |
16725b9d SW |
985 | } |
986 | ||
987 | static struct file_system_type ceph_fs_type = { | |
988 | .owner = THIS_MODULE, | |
989 | .name = "ceph", | |
a7f9fb20 | 990 | .mount = ceph_mount, |
16725b9d SW |
991 | .kill_sb = ceph_kill_sb, |
992 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
993 | }; | |
7f78e035 | 994 | MODULE_ALIAS_FS("ceph"); |
16725b9d SW |
995 | |
996 | #define _STRINGIFY(x) #x | |
997 | #define STRINGIFY(x) _STRINGIFY(x) | |
998 | ||
999 | static int __init init_ceph(void) | |
1000 | { | |
3d14c5d2 | 1001 | int ret = init_caches(); |
16725b9d | 1002 | if (ret) |
3d14c5d2 | 1003 | goto out; |
16725b9d | 1004 | |
3ce6cd12 | 1005 | ceph_xattr_init(); |
16725b9d SW |
1006 | ret = register_filesystem(&ceph_fs_type); |
1007 | if (ret) | |
1008 | goto out_icache; | |
1009 | ||
3d14c5d2 YS |
1010 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
1011 | ||
16725b9d SW |
1012 | return 0; |
1013 | ||
1014 | out_icache: | |
3ce6cd12 | 1015 | ceph_xattr_exit(); |
16725b9d | 1016 | destroy_caches(); |
16725b9d SW |
1017 | out: |
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | static void __exit exit_ceph(void) | |
1022 | { | |
1023 | dout("exit_ceph\n"); | |
1024 | unregister_filesystem(&ceph_fs_type); | |
3ce6cd12 | 1025 | ceph_xattr_exit(); |
16725b9d | 1026 | destroy_caches(); |
16725b9d SW |
1027 | } |
1028 | ||
1029 | module_init(init_ceph); | |
1030 | module_exit(exit_ceph); | |
1031 | ||
1032 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1033 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1034 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1035 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1036 | MODULE_LICENSE("GPL"); |