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 YS |
19 | #include "mds_client.h" |
20 | ||
21 | #include <linux/ceph/decode.h> | |
22 | #include <linux/ceph/mon_client.h> | |
23 | #include <linux/ceph/auth.h> | |
24 | #include <linux/ceph/debugfs.h> | |
16725b9d SW |
25 | |
26 | /* | |
27 | * Ceph superblock operations | |
28 | * | |
29 | * Handle the basics of mounting, unmounting. | |
30 | */ | |
31 | ||
16725b9d SW |
32 | /* |
33 | * super ops | |
34 | */ | |
35 | static void ceph_put_super(struct super_block *s) | |
36 | { | |
3d14c5d2 | 37 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d SW |
38 | |
39 | dout("put_super\n"); | |
3d14c5d2 | 40 | ceph_mdsc_close_sessions(fsc->mdsc); |
5dfc589a SW |
41 | |
42 | /* | |
43 | * ensure we release the bdi before put_anon_super releases | |
44 | * the device name. | |
45 | */ | |
3d14c5d2 YS |
46 | if (s->s_bdi == &fsc->backing_dev_info) { |
47 | bdi_unregister(&fsc->backing_dev_info); | |
5dfc589a SW |
48 | s->s_bdi = NULL; |
49 | } | |
50 | ||
16725b9d SW |
51 | return; |
52 | } | |
53 | ||
54 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
55 | { | |
3d14c5d2 YS |
56 | struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode); |
57 | struct ceph_monmap *monmap = fsc->client->monc.monmap; | |
16725b9d SW |
58 | struct ceph_statfs st; |
59 | u64 fsid; | |
60 | int err; | |
61 | ||
62 | dout("statfs\n"); | |
3d14c5d2 | 63 | err = ceph_monc_do_statfs(&fsc->client->monc, &st); |
16725b9d SW |
64 | if (err < 0) |
65 | return err; | |
66 | ||
67 | /* fill in kstatfs */ | |
68 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
69 | ||
70 | /* | |
71 | * express utilization in terms of large blocks to avoid | |
72 | * overflow on 32-bit machines. | |
73 | */ | |
74 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
75 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
8f04d422 | 76 | buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
16725b9d SW |
77 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); |
78 | ||
79 | buf->f_files = le64_to_cpu(st.num_objects); | |
80 | buf->f_ffree = -1; | |
558d3499 | 81 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
82 | buf->f_frsize = PAGE_CACHE_SIZE; |
83 | ||
84 | /* leave fsid little-endian, regardless of host endianness */ | |
85 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
86 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
87 | buf->f_fsid.val[1] = fsid >> 32; | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | ||
2d9c98ae | 93 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 94 | { |
3d14c5d2 | 95 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
96 | |
97 | if (!wait) { | |
98 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 99 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
100 | dout("sync_fs (non-blocking) done\n"); |
101 | return 0; | |
102 | } | |
103 | ||
104 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
105 | ceph_osdc_sync(&fsc->client->osdc); |
106 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 107 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
108 | return 0; |
109 | } | |
110 | ||
16725b9d SW |
111 | /* |
112 | * mount options | |
113 | */ | |
114 | enum { | |
16725b9d SW |
115 | Opt_wsize, |
116 | Opt_rsize, | |
16725b9d SW |
117 | Opt_caps_wanted_delay_min, |
118 | Opt_caps_wanted_delay_max, | |
6e19a16e | 119 | Opt_cap_release_safety, |
16725b9d | 120 | Opt_readdir_max_entries, |
23804d91 | 121 | Opt_readdir_max_bytes, |
2baba250 | 122 | Opt_congestion_kb, |
e53c2fe0 | 123 | Opt_last_int, |
16725b9d SW |
124 | /* int args above */ |
125 | Opt_snapdirname, | |
e53c2fe0 | 126 | Opt_last_string, |
16725b9d | 127 | /* string args above */ |
16725b9d SW |
128 | Opt_dirstat, |
129 | Opt_nodirstat, | |
130 | Opt_rbytes, | |
131 | Opt_norbytes, | |
16725b9d | 132 | Opt_noasyncreaddir, |
ad1fee96 | 133 | Opt_ino32, |
16725b9d SW |
134 | }; |
135 | ||
3d14c5d2 | 136 | static match_table_t fsopt_tokens = { |
16725b9d SW |
137 | {Opt_wsize, "wsize=%d"}, |
138 | {Opt_rsize, "rsize=%d"}, | |
16725b9d SW |
139 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
140 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 141 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 142 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 143 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 144 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
145 | /* int args above */ |
146 | {Opt_snapdirname, "snapdirname=%s"}, | |
16725b9d | 147 | /* string args above */ |
16725b9d SW |
148 | {Opt_dirstat, "dirstat"}, |
149 | {Opt_nodirstat, "nodirstat"}, | |
150 | {Opt_rbytes, "rbytes"}, | |
151 | {Opt_norbytes, "norbytes"}, | |
16725b9d | 152 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
ad1fee96 | 153 | {Opt_ino32, "ino32"}, |
16725b9d SW |
154 | {-1, NULL} |
155 | }; | |
156 | ||
3d14c5d2 | 157 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 158 | { |
3d14c5d2 YS |
159 | struct ceph_mount_options *fsopt = private; |
160 | substring_t argstr[MAX_OPT_ARGS]; | |
161 | int token, intval, ret; | |
162 | ||
163 | token = match_token((char *)c, fsopt_tokens, argstr); | |
164 | if (token < 0) | |
165 | return -EINVAL; | |
166 | ||
167 | if (token < Opt_last_int) { | |
168 | ret = match_int(&argstr[0], &intval); | |
169 | if (ret < 0) { | |
170 | pr_err("bad mount option arg (not int) " | |
171 | "at '%s'\n", c); | |
172 | return ret; | |
c309f0ab | 173 | } |
3d14c5d2 YS |
174 | dout("got int token %d val %d\n", token, intval); |
175 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
176 | dout("got string token %d val %s\n", token, | |
177 | argstr[0].from); | |
178 | } else { | |
179 | dout("got token %d\n", token); | |
c309f0ab SW |
180 | } |
181 | ||
3d14c5d2 YS |
182 | switch (token) { |
183 | case Opt_snapdirname: | |
184 | kfree(fsopt->snapdir_name); | |
185 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
186 | argstr[0].to-argstr[0].from, | |
187 | GFP_KERNEL); | |
188 | if (!fsopt->snapdir_name) | |
189 | return -ENOMEM; | |
190 | break; | |
191 | ||
192 | /* misc */ | |
193 | case Opt_wsize: | |
194 | fsopt->wsize = intval; | |
195 | break; | |
196 | case Opt_rsize: | |
197 | fsopt->rsize = intval; | |
198 | break; | |
199 | case Opt_caps_wanted_delay_min: | |
200 | fsopt->caps_wanted_delay_min = intval; | |
201 | break; | |
202 | case Opt_caps_wanted_delay_max: | |
203 | fsopt->caps_wanted_delay_max = intval; | |
204 | break; | |
205 | case Opt_readdir_max_entries: | |
206 | fsopt->max_readdir = intval; | |
207 | break; | |
208 | case Opt_readdir_max_bytes: | |
209 | fsopt->max_readdir_bytes = intval; | |
210 | break; | |
211 | case Opt_congestion_kb: | |
212 | fsopt->congestion_kb = intval; | |
213 | break; | |
214 | case Opt_dirstat: | |
215 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
216 | break; | |
217 | case Opt_nodirstat: | |
218 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
219 | break; | |
220 | case Opt_rbytes: | |
221 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
222 | break; | |
223 | case Opt_norbytes: | |
224 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
225 | break; | |
226 | case Opt_noasyncreaddir: | |
227 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
228 | break; | |
ad1fee96 YS |
229 | case Opt_ino32: |
230 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
231 | break; | |
3d14c5d2 YS |
232 | default: |
233 | BUG_ON(token); | |
234 | } | |
235 | return 0; | |
c309f0ab | 236 | } |
16725b9d | 237 | |
3d14c5d2 | 238 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 239 | { |
3d14c5d2 YS |
240 | dout("destroy_mount_options %p\n", args); |
241 | kfree(args->snapdir_name); | |
242 | kfree(args); | |
243 | } | |
16725b9d | 244 | |
3d14c5d2 YS |
245 | static int strcmp_null(const char *s1, const char *s2) |
246 | { | |
247 | if (!s1 && !s2) | |
248 | return 0; | |
249 | if (s1 && !s2) | |
250 | return -1; | |
251 | if (!s1 && s2) | |
252 | return 1; | |
253 | return strcmp(s1, s2); | |
254 | } | |
16725b9d | 255 | |
3d14c5d2 YS |
256 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
257 | struct ceph_options *new_opt, | |
258 | struct ceph_fs_client *fsc) | |
259 | { | |
260 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
261 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
262 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
263 | int ret; | |
16725b9d | 264 | |
3d14c5d2 YS |
265 | ret = memcmp(fsopt1, fsopt2, ofs); |
266 | if (ret) | |
267 | return ret; | |
268 | ||
269 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
270 | if (ret) | |
271 | return ret; | |
272 | ||
273 | return ceph_compare_options(new_opt, fsc->client); | |
274 | } | |
275 | ||
276 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
277 | struct ceph_options **popt, | |
278 | int flags, char *options, | |
279 | const char *dev_name, | |
280 | const char **path) | |
281 | { | |
282 | struct ceph_mount_options *fsopt; | |
283 | const char *dev_name_end; | |
284 | int err = -ENOMEM; | |
285 | ||
286 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
287 | if (!fsopt) | |
288 | return -ENOMEM; | |
289 | ||
290 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
291 | ||
292 | fsopt->sb_flags = flags; | |
293 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
294 | ||
80456f86 | 295 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
3d14c5d2 | 296 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
50aac4fe SW |
297 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
298 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
3d14c5d2 YS |
299 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
300 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
301 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
302 | fsopt->congestion_kb = default_congestion_kb(); | |
303 | ||
304 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ | |
305 | err = -EINVAL; | |
306 | if (!dev_name) | |
307 | goto out; | |
308 | *path = strstr(dev_name, ":/"); | |
309 | if (*path == NULL) { | |
310 | pr_err("device name is missing path (no :/ in %s)\n", | |
311 | dev_name); | |
312 | goto out; | |
313 | } | |
314 | dev_name_end = *path; | |
315 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); | |
16725b9d | 316 | |
16725b9d SW |
317 | /* path on server */ |
318 | *path += 2; | |
319 | dout("server path '%s'\n", *path); | |
320 | ||
3d14c5d2 YS |
321 | err = ceph_parse_options(popt, options, dev_name, dev_name_end, |
322 | parse_fsopt_token, (void *)fsopt); | |
323 | if (err) | |
324 | goto out; | |
325 | ||
326 | /* success */ | |
327 | *pfsopt = fsopt; | |
328 | return 0; | |
16725b9d | 329 | |
7b813c46 | 330 | out: |
3d14c5d2 YS |
331 | destroy_mount_options(fsopt); |
332 | return err; | |
16725b9d SW |
333 | } |
334 | ||
3d14c5d2 YS |
335 | /** |
336 | * ceph_show_options - Show mount options in /proc/mounts | |
337 | * @m: seq_file to write to | |
338 | * @mnt: mount descriptor | |
339 | */ | |
340 | static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt) | |
16725b9d | 341 | { |
3d14c5d2 YS |
342 | struct ceph_fs_client *fsc = ceph_sb_to_client(mnt->mnt_sb); |
343 | struct ceph_mount_options *fsopt = fsc->mount_options; | |
344 | struct ceph_options *opt = fsc->client->options; | |
345 | ||
346 | if (opt->flags & CEPH_OPT_FSID) | |
347 | seq_printf(m, ",fsid=%pU", &opt->fsid); | |
348 | if (opt->flags & CEPH_OPT_NOSHARE) | |
349 | seq_puts(m, ",noshare"); | |
350 | if (opt->flags & CEPH_OPT_NOCRC) | |
351 | seq_puts(m, ",nocrc"); | |
352 | ||
353 | if (opt->name) | |
354 | seq_printf(m, ",name=%s", opt->name); | |
8323c3aa | 355 | if (opt->key) |
3d14c5d2 YS |
356 | seq_puts(m, ",secret=<hidden>"); |
357 | ||
358 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
359 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); | |
360 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
361 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); | |
362 | if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT) | |
363 | seq_printf(m, ",osdtimeout=%d", opt->osd_timeout); | |
364 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) | |
365 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
366 | opt->osd_keepalive_timeout); | |
367 | ||
368 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
369 | seq_puts(m, ",dirstat"); | |
370 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) | |
371 | seq_puts(m, ",norbytes"); | |
372 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) | |
373 | seq_puts(m, ",noasyncreaddir"); | |
374 | ||
375 | if (fsopt->wsize) | |
376 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 377 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 YS |
378 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
379 | if (fsopt->congestion_kb != default_congestion_kb()) | |
380 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
381 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
382 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
383 | fsopt->caps_wanted_delay_min); | |
384 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
385 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
386 | fsopt->caps_wanted_delay_max); | |
387 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
388 | seq_printf(m, ",cap_release_safety=%d", | |
389 | fsopt->cap_release_safety); | |
390 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
391 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
392 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
393 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
394 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
395 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); | |
396 | return 0; | |
16725b9d SW |
397 | } |
398 | ||
399 | /* | |
3d14c5d2 YS |
400 | * handle any mon messages the standard library doesn't understand. |
401 | * return error if we don't either. | |
16725b9d | 402 | */ |
3d14c5d2 | 403 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 404 | { |
3d14c5d2 YS |
405 | struct ceph_fs_client *fsc = client->private; |
406 | int type = le16_to_cpu(msg->hdr.type); | |
407 | ||
408 | switch (type) { | |
409 | case CEPH_MSG_MDS_MAP: | |
410 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
411 | return 0; | |
412 | ||
413 | default: | |
414 | return -1; | |
415 | } | |
416 | } | |
417 | ||
418 | /* | |
419 | * create a new fs client | |
420 | */ | |
421 | struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, | |
422 | struct ceph_options *opt) | |
423 | { | |
424 | struct ceph_fs_client *fsc; | |
16725b9d SW |
425 | int err = -ENOMEM; |
426 | ||
3d14c5d2 YS |
427 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
428 | if (!fsc) | |
16725b9d SW |
429 | return ERR_PTR(-ENOMEM); |
430 | ||
3d14c5d2 YS |
431 | fsc->client = ceph_create_client(opt, fsc); |
432 | if (IS_ERR(fsc->client)) { | |
433 | err = PTR_ERR(fsc->client); | |
434 | goto fail; | |
435 | } | |
436 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
14303d20 SW |
437 | fsc->client->supported_features |= CEPH_FEATURE_FLOCK | |
438 | CEPH_FEATURE_DIRLAYOUTHASH; | |
3d14c5d2 | 439 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 440 | |
3d14c5d2 | 441 | fsc->mount_options = fsopt; |
16725b9d | 442 | |
3d14c5d2 YS |
443 | fsc->sb = NULL; |
444 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 445 | |
3d14c5d2 | 446 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 447 | |
3d14c5d2 | 448 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 449 | if (err < 0) |
3d14c5d2 | 450 | goto fail_client; |
859e7b14 | 451 | |
16725b9d | 452 | err = -ENOMEM; |
01e6acc4 TH |
453 | /* |
454 | * The number of concurrent works can be high but they don't need | |
455 | * to be processed in parallel, limit concurrency. | |
456 | */ | |
457 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 458 | if (fsc->wb_wq == NULL) |
859e7b14 | 459 | goto fail_bdi; |
01e6acc4 | 460 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 461 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 462 | goto fail_wb_wq; |
01e6acc4 | 463 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 464 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
465 | goto fail_pg_inv_wq; |
466 | ||
b9bfb93c SW |
467 | /* set up mempools */ |
468 | err = -ENOMEM; | |
3d14c5d2 YS |
469 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, |
470 | fsc->mount_options->wsize >> PAGE_CACHE_SHIFT); | |
471 | if (!fsc->wb_pagevec_pool) | |
b9bfb93c SW |
472 | goto fail_trunc_wq; |
473 | ||
85ccce43 | 474 | /* caps */ |
3d14c5d2 YS |
475 | fsc->min_caps = fsopt->max_readdir; |
476 | ||
477 | return fsc; | |
b9bfb93c | 478 | |
16725b9d | 479 | fail_trunc_wq: |
3d14c5d2 | 480 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 481 | fail_pg_inv_wq: |
3d14c5d2 | 482 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 483 | fail_wb_wq: |
3d14c5d2 | 484 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 485 | fail_bdi: |
3d14c5d2 YS |
486 | bdi_destroy(&fsc->backing_dev_info); |
487 | fail_client: | |
488 | ceph_destroy_client(fsc->client); | |
16725b9d | 489 | fail: |
3d14c5d2 | 490 | kfree(fsc); |
16725b9d SW |
491 | return ERR_PTR(err); |
492 | } | |
493 | ||
3d14c5d2 | 494 | void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 495 | { |
3d14c5d2 | 496 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 497 | |
3d14c5d2 YS |
498 | destroy_workqueue(fsc->wb_wq); |
499 | destroy_workqueue(fsc->pg_inv_wq); | |
500 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 501 | |
3d14c5d2 | 502 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 503 | |
3d14c5d2 | 504 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 505 | |
3d14c5d2 | 506 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 507 | |
3d14c5d2 | 508 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 509 | |
3d14c5d2 | 510 | ceph_destroy_client(fsc->client); |
16725b9d | 511 | |
3d14c5d2 YS |
512 | kfree(fsc); |
513 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
514 | } |
515 | ||
0743304d | 516 | /* |
3d14c5d2 | 517 | * caches |
0743304d | 518 | */ |
3d14c5d2 YS |
519 | struct kmem_cache *ceph_inode_cachep; |
520 | struct kmem_cache *ceph_cap_cachep; | |
521 | struct kmem_cache *ceph_dentry_cachep; | |
522 | struct kmem_cache *ceph_file_cachep; | |
523 | ||
524 | static void ceph_inode_init_once(void *foo) | |
0743304d | 525 | { |
3d14c5d2 YS |
526 | struct ceph_inode_info *ci = foo; |
527 | inode_init_once(&ci->vfs_inode); | |
528 | } | |
529 | ||
530 | static int __init init_caches(void) | |
531 | { | |
532 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
533 | sizeof(struct ceph_inode_info), | |
534 | __alignof__(struct ceph_inode_info), | |
535 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
536 | ceph_inode_init_once); | |
537 | if (ceph_inode_cachep == NULL) | |
538 | return -ENOMEM; | |
539 | ||
540 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
541 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
542 | if (ceph_cap_cachep == NULL) | |
543 | goto bad_cap; | |
544 | ||
545 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
546 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
547 | if (ceph_dentry_cachep == NULL) | |
548 | goto bad_dentry; | |
549 | ||
550 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
551 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
552 | if (ceph_file_cachep == NULL) | |
553 | goto bad_file; | |
554 | ||
0743304d | 555 | return 0; |
3d14c5d2 YS |
556 | |
557 | bad_file: | |
558 | kmem_cache_destroy(ceph_dentry_cachep); | |
559 | bad_dentry: | |
560 | kmem_cache_destroy(ceph_cap_cachep); | |
561 | bad_cap: | |
562 | kmem_cache_destroy(ceph_inode_cachep); | |
563 | return -ENOMEM; | |
0743304d SW |
564 | } |
565 | ||
3d14c5d2 YS |
566 | static void destroy_caches(void) |
567 | { | |
568 | kmem_cache_destroy(ceph_inode_cachep); | |
569 | kmem_cache_destroy(ceph_cap_cachep); | |
570 | kmem_cache_destroy(ceph_dentry_cachep); | |
571 | kmem_cache_destroy(ceph_file_cachep); | |
572 | } | |
573 | ||
574 | ||
16725b9d | 575 | /* |
3d14c5d2 YS |
576 | * ceph_umount_begin - initiate forced umount. Tear down down the |
577 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 578 | */ |
3d14c5d2 | 579 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 580 | { |
3d14c5d2 YS |
581 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
582 | ||
583 | dout("ceph_umount_begin - starting forced umount\n"); | |
584 | if (!fsc) | |
585 | return; | |
586 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
587 | return; | |
16725b9d SW |
588 | } |
589 | ||
3d14c5d2 YS |
590 | static const struct super_operations ceph_super_ops = { |
591 | .alloc_inode = ceph_alloc_inode, | |
592 | .destroy_inode = ceph_destroy_inode, | |
593 | .write_inode = ceph_write_inode, | |
594 | .sync_fs = ceph_sync_fs, | |
595 | .put_super = ceph_put_super, | |
596 | .show_options = ceph_show_options, | |
597 | .statfs = ceph_statfs, | |
598 | .umount_begin = ceph_umount_begin, | |
599 | }; | |
600 | ||
16725b9d SW |
601 | /* |
602 | * Bootstrap mount by opening the root directory. Note the mount | |
603 | * @started time from caller, and time out if this takes too long. | |
604 | */ | |
3d14c5d2 | 605 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
606 | const char *path, |
607 | unsigned long started) | |
608 | { | |
3d14c5d2 | 609 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
610 | struct ceph_mds_request *req = NULL; |
611 | int err; | |
612 | struct dentry *root; | |
613 | ||
614 | /* open dir */ | |
615 | dout("open_root_inode opening '%s'\n", path); | |
616 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
617 | if (IS_ERR(req)) | |
7e34bc52 | 618 | return ERR_CAST(req); |
16725b9d SW |
619 | req->r_path1 = kstrdup(path, GFP_NOFS); |
620 | req->r_ino1.ino = CEPH_INO_ROOT; | |
621 | req->r_ino1.snap = CEPH_NOSNAP; | |
622 | req->r_started = started; | |
3d14c5d2 | 623 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
624 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
625 | req->r_num_caps = 2; | |
626 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
627 | if (err == 0) { | |
628 | dout("open_root_inode success\n"); | |
629 | if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && | |
3d14c5d2 | 630 | fsc->sb->s_root == NULL) |
16725b9d SW |
631 | root = d_alloc_root(req->r_target_inode); |
632 | else | |
633 | root = d_obtain_alias(req->r_target_inode); | |
634 | req->r_target_inode = NULL; | |
635 | dout("open_root_inode success, root dentry is %p\n", root); | |
636 | } else { | |
637 | root = ERR_PTR(err); | |
638 | } | |
639 | ceph_mdsc_put_request(req); | |
640 | return root; | |
641 | } | |
642 | ||
3d14c5d2 YS |
643 | |
644 | ||
645 | ||
16725b9d SW |
646 | /* |
647 | * mount: join the ceph cluster, and open root directory. | |
648 | */ | |
a7f9fb20 | 649 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
650 | const char *path) |
651 | { | |
16725b9d | 652 | int err; |
16725b9d SW |
653 | unsigned long started = jiffies; /* note the start time */ |
654 | struct dentry *root; | |
3d14c5d2 | 655 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
656 | |
657 | dout("mount start\n"); | |
3d14c5d2 | 658 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 659 | |
3d14c5d2 | 660 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
661 | if (err < 0) |
662 | goto out; | |
663 | ||
16725b9d | 664 | dout("mount opening root\n"); |
3d14c5d2 | 665 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
666 | if (IS_ERR(root)) { |
667 | err = PTR_ERR(root); | |
668 | goto out; | |
669 | } | |
3d14c5d2 | 670 | if (fsc->sb->s_root) { |
16725b9d | 671 | dput(root); |
3d14c5d2 YS |
672 | } else { |
673 | fsc->sb->s_root = root; | |
674 | first = 1; | |
675 | ||
676 | err = ceph_fs_debugfs_init(fsc); | |
677 | if (err < 0) | |
678 | goto fail; | |
679 | } | |
16725b9d SW |
680 | |
681 | if (path[0] == 0) { | |
682 | dget(root); | |
683 | } else { | |
684 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 685 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
686 | if (IS_ERR(root)) { |
687 | err = PTR_ERR(root); | |
3d14c5d2 | 688 | goto fail; |
16725b9d SW |
689 | } |
690 | } | |
691 | ||
3d14c5d2 | 692 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 693 | dout("mount success\n"); |
a7f9fb20 AV |
694 | mutex_unlock(&fsc->client->mount_mutex); |
695 | return root; | |
16725b9d SW |
696 | |
697 | out: | |
3d14c5d2 | 698 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 699 | return ERR_PTR(err); |
3d14c5d2 YS |
700 | |
701 | fail: | |
702 | if (first) { | |
703 | dput(fsc->sb->s_root); | |
704 | fsc->sb->s_root = NULL; | |
705 | } | |
706 | goto out; | |
16725b9d SW |
707 | } |
708 | ||
709 | static int ceph_set_super(struct super_block *s, void *data) | |
710 | { | |
3d14c5d2 | 711 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
712 | int ret; |
713 | ||
714 | dout("set_super %p data %p\n", s, data); | |
715 | ||
3d14c5d2 | 716 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
717 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
718 | ||
3d14c5d2 YS |
719 | s->s_fs_info = fsc; |
720 | fsc->sb = s; | |
16725b9d SW |
721 | |
722 | s->s_op = &ceph_super_ops; | |
723 | s->s_export_op = &ceph_export_ops; | |
724 | ||
725 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
726 | ||
727 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
728 | if (ret != 0) | |
729 | goto fail; | |
730 | ||
731 | return ret; | |
732 | ||
733 | fail: | |
734 | s->s_fs_info = NULL; | |
3d14c5d2 | 735 | fsc->sb = NULL; |
16725b9d SW |
736 | return ret; |
737 | } | |
738 | ||
739 | /* | |
740 | * share superblock if same fs AND options | |
741 | */ | |
742 | static int ceph_compare_super(struct super_block *sb, void *data) | |
743 | { | |
3d14c5d2 YS |
744 | struct ceph_fs_client *new = data; |
745 | struct ceph_mount_options *fsopt = new->mount_options; | |
746 | struct ceph_options *opt = new->client->options; | |
747 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
748 | |
749 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
750 | |
751 | if (compare_mount_options(fsopt, opt, other)) { | |
752 | dout("monitor(s)/mount options don't match\n"); | |
753 | return 0; | |
16725b9d | 754 | } |
3d14c5d2 YS |
755 | if ((opt->flags & CEPH_OPT_FSID) && |
756 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
757 | dout("fsid doesn't match\n"); | |
758 | return 0; | |
759 | } | |
760 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
761 | dout("flags differ\n"); |
762 | return 0; | |
763 | } | |
764 | return 1; | |
765 | } | |
766 | ||
767 | /* | |
768 | * construct our own bdi so we can control readahead, etc. | |
769 | */ | |
00d5643e | 770 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 771 | |
3d14c5d2 YS |
772 | static int ceph_register_bdi(struct super_block *sb, |
773 | struct ceph_fs_client *fsc) | |
16725b9d SW |
774 | { |
775 | int err; | |
776 | ||
16725b9d | 777 | /* set ra_pages based on rsize mount option? */ |
3d14c5d2 YS |
778 | if (fsc->mount_options->rsize >= PAGE_CACHE_SIZE) |
779 | fsc->backing_dev_info.ra_pages = | |
780 | (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1) | |
16725b9d | 781 | >> PAGE_SHIFT; |
e9852227 YS |
782 | else |
783 | fsc->backing_dev_info.ra_pages = | |
784 | default_backing_dev_info.ra_pages; | |
785 | ||
3d14c5d2 | 786 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d", |
31e0cf8f | 787 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 788 | if (!err) |
3d14c5d2 | 789 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
790 | return err; |
791 | } | |
792 | ||
a7f9fb20 AV |
793 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
794 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
795 | { |
796 | struct super_block *sb; | |
3d14c5d2 | 797 | struct ceph_fs_client *fsc; |
a7f9fb20 | 798 | struct dentry *res; |
16725b9d SW |
799 | int err; |
800 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 801 | const char *path = NULL; |
3d14c5d2 YS |
802 | struct ceph_mount_options *fsopt = NULL; |
803 | struct ceph_options *opt = NULL; | |
16725b9d | 804 | |
a7f9fb20 | 805 | dout("ceph_mount\n"); |
3d14c5d2 | 806 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
807 | if (err < 0) { |
808 | res = ERR_PTR(err); | |
6b805185 | 809 | goto out_final; |
a7f9fb20 | 810 | } |
16725b9d SW |
811 | |
812 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
813 | fsc = create_fs_client(fsopt, opt); |
814 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 815 | res = ERR_CAST(fsc); |
3d14c5d2 YS |
816 | kfree(fsopt); |
817 | kfree(opt); | |
6b805185 SW |
818 | goto out_final; |
819 | } | |
16725b9d | 820 | |
3d14c5d2 | 821 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
822 | if (err < 0) { |
823 | res = ERR_PTR(err); | |
3d14c5d2 | 824 | goto out; |
a7f9fb20 | 825 | } |
3d14c5d2 YS |
826 | |
827 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 828 | compare_super = NULL; |
3d14c5d2 | 829 | sb = sget(fs_type, compare_super, ceph_set_super, fsc); |
16725b9d | 830 | if (IS_ERR(sb)) { |
a7f9fb20 | 831 | res = ERR_CAST(sb); |
16725b9d SW |
832 | goto out; |
833 | } | |
834 | ||
3d14c5d2 YS |
835 | if (ceph_sb_to_client(sb) != fsc) { |
836 | ceph_mdsc_destroy(fsc); | |
837 | destroy_fs_client(fsc); | |
838 | fsc = ceph_sb_to_client(sb); | |
839 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 840 | } else { |
3d14c5d2 YS |
841 | dout("get_sb using new client %p\n", fsc); |
842 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
843 | if (err < 0) { |
844 | res = ERR_PTR(err); | |
16725b9d | 845 | goto out_splat; |
a7f9fb20 | 846 | } |
16725b9d SW |
847 | } |
848 | ||
a7f9fb20 AV |
849 | res = ceph_real_mount(fsc, path); |
850 | if (IS_ERR(res)) | |
16725b9d | 851 | goto out_splat; |
a7f9fb20 AV |
852 | dout("root %p inode %p ino %llx.%llx\n", res, |
853 | res->d_inode, ceph_vinop(res->d_inode)); | |
854 | return res; | |
16725b9d SW |
855 | |
856 | out_splat: | |
3d14c5d2 | 857 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 858 | deactivate_locked_super(sb); |
16725b9d SW |
859 | goto out_final; |
860 | ||
861 | out: | |
3d14c5d2 YS |
862 | ceph_mdsc_destroy(fsc); |
863 | destroy_fs_client(fsc); | |
16725b9d | 864 | out_final: |
a7f9fb20 AV |
865 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
866 | return res; | |
16725b9d SW |
867 | } |
868 | ||
869 | static void ceph_kill_sb(struct super_block *s) | |
870 | { | |
3d14c5d2 | 871 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 872 | dout("kill_sb %p\n", s); |
3d14c5d2 | 873 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 874 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
875 | ceph_mdsc_destroy(fsc); |
876 | destroy_fs_client(fsc); | |
16725b9d SW |
877 | } |
878 | ||
879 | static struct file_system_type ceph_fs_type = { | |
880 | .owner = THIS_MODULE, | |
881 | .name = "ceph", | |
a7f9fb20 | 882 | .mount = ceph_mount, |
16725b9d SW |
883 | .kill_sb = ceph_kill_sb, |
884 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
885 | }; | |
886 | ||
887 | #define _STRINGIFY(x) #x | |
888 | #define STRINGIFY(x) _STRINGIFY(x) | |
889 | ||
890 | static int __init init_ceph(void) | |
891 | { | |
3d14c5d2 | 892 | int ret = init_caches(); |
16725b9d | 893 | if (ret) |
3d14c5d2 | 894 | goto out; |
16725b9d | 895 | |
16725b9d SW |
896 | ret = register_filesystem(&ceph_fs_type); |
897 | if (ret) | |
898 | goto out_icache; | |
899 | ||
3d14c5d2 YS |
900 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
901 | ||
16725b9d SW |
902 | return 0; |
903 | ||
904 | out_icache: | |
905 | destroy_caches(); | |
16725b9d SW |
906 | out: |
907 | return ret; | |
908 | } | |
909 | ||
910 | static void __exit exit_ceph(void) | |
911 | { | |
912 | dout("exit_ceph\n"); | |
913 | unregister_filesystem(&ceph_fs_type); | |
16725b9d | 914 | destroy_caches(); |
16725b9d SW |
915 | } |
916 | ||
917 | module_init(init_ceph); | |
918 | module_exit(exit_ceph); | |
919 | ||
920 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
921 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
922 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
923 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
924 | MODULE_LICENSE("GPL"); |