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Commit | Line | Data |
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16725b9d | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
16725b9d SW |
3 | |
4 | #include <linux/backing-dev.h> | |
c309f0ab | 5 | #include <linux/ctype.h> |
16725b9d SW |
6 | #include <linux/fs.h> |
7 | #include <linux/inet.h> | |
8 | #include <linux/in6.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/mount.h> | |
11 | #include <linux/parser.h> | |
16725b9d SW |
12 | #include <linux/sched.h> |
13 | #include <linux/seq_file.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
16725b9d SW |
15 | #include <linux/statfs.h> |
16 | #include <linux/string.h> | |
16725b9d | 17 | |
16725b9d | 18 | #include "super.h" |
3d14c5d2 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); | |
76 | buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >> | |
77 | (CEPH_BLOCK_SHIFT-10); | |
78 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
79 | ||
80 | buf->f_files = le64_to_cpu(st.num_objects); | |
81 | buf->f_ffree = -1; | |
558d3499 | 82 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
83 | buf->f_frsize = PAGE_CACHE_SIZE; |
84 | ||
85 | /* leave fsid little-endian, regardless of host endianness */ | |
86 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
87 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
88 | buf->f_fsid.val[1] = fsid >> 32; | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | ||
2d9c98ae | 94 | static int ceph_sync_fs(struct super_block *sb, int wait) |
16725b9d | 95 | { |
3d14c5d2 | 96 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
2d9c98ae SW |
97 | |
98 | if (!wait) { | |
99 | dout("sync_fs (non-blocking)\n"); | |
3d14c5d2 | 100 | ceph_flush_dirty_caps(fsc->mdsc); |
2d9c98ae SW |
101 | dout("sync_fs (non-blocking) done\n"); |
102 | return 0; | |
103 | } | |
104 | ||
105 | dout("sync_fs (blocking)\n"); | |
3d14c5d2 YS |
106 | ceph_osdc_sync(&fsc->client->osdc); |
107 | ceph_mdsc_sync(fsc->mdsc); | |
2d9c98ae | 108 | dout("sync_fs (blocking) done\n"); |
16725b9d SW |
109 | return 0; |
110 | } | |
111 | ||
16725b9d SW |
112 | /* |
113 | * mount options | |
114 | */ | |
115 | enum { | |
16725b9d SW |
116 | Opt_wsize, |
117 | Opt_rsize, | |
16725b9d SW |
118 | Opt_caps_wanted_delay_min, |
119 | Opt_caps_wanted_delay_max, | |
6e19a16e | 120 | Opt_cap_release_safety, |
16725b9d | 121 | Opt_readdir_max_entries, |
23804d91 | 122 | Opt_readdir_max_bytes, |
2baba250 | 123 | Opt_congestion_kb, |
e53c2fe0 | 124 | Opt_last_int, |
16725b9d SW |
125 | /* int args above */ |
126 | Opt_snapdirname, | |
e53c2fe0 | 127 | Opt_last_string, |
16725b9d | 128 | /* string args above */ |
16725b9d SW |
129 | Opt_dirstat, |
130 | Opt_nodirstat, | |
131 | Opt_rbytes, | |
132 | Opt_norbytes, | |
16725b9d | 133 | Opt_noasyncreaddir, |
ad1fee96 | 134 | Opt_ino32, |
16725b9d SW |
135 | }; |
136 | ||
3d14c5d2 | 137 | static match_table_t fsopt_tokens = { |
16725b9d SW |
138 | {Opt_wsize, "wsize=%d"}, |
139 | {Opt_rsize, "rsize=%d"}, | |
16725b9d SW |
140 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
141 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 142 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 143 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 144 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 145 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
146 | /* int args above */ |
147 | {Opt_snapdirname, "snapdirname=%s"}, | |
16725b9d | 148 | /* string args above */ |
16725b9d SW |
149 | {Opt_dirstat, "dirstat"}, |
150 | {Opt_nodirstat, "nodirstat"}, | |
151 | {Opt_rbytes, "rbytes"}, | |
152 | {Opt_norbytes, "norbytes"}, | |
16725b9d | 153 | {Opt_noasyncreaddir, "noasyncreaddir"}, |
ad1fee96 | 154 | {Opt_ino32, "ino32"}, |
16725b9d SW |
155 | {-1, NULL} |
156 | }; | |
157 | ||
3d14c5d2 | 158 | static int parse_fsopt_token(char *c, void *private) |
c309f0ab | 159 | { |
3d14c5d2 YS |
160 | struct ceph_mount_options *fsopt = private; |
161 | substring_t argstr[MAX_OPT_ARGS]; | |
162 | int token, intval, ret; | |
163 | ||
164 | token = match_token((char *)c, fsopt_tokens, argstr); | |
165 | if (token < 0) | |
166 | return -EINVAL; | |
167 | ||
168 | if (token < Opt_last_int) { | |
169 | ret = match_int(&argstr[0], &intval); | |
170 | if (ret < 0) { | |
171 | pr_err("bad mount option arg (not int) " | |
172 | "at '%s'\n", c); | |
173 | return ret; | |
c309f0ab | 174 | } |
3d14c5d2 YS |
175 | dout("got int token %d val %d\n", token, intval); |
176 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
177 | dout("got string token %d val %s\n", token, | |
178 | argstr[0].from); | |
179 | } else { | |
180 | dout("got token %d\n", token); | |
c309f0ab SW |
181 | } |
182 | ||
3d14c5d2 YS |
183 | switch (token) { |
184 | case Opt_snapdirname: | |
185 | kfree(fsopt->snapdir_name); | |
186 | fsopt->snapdir_name = kstrndup(argstr[0].from, | |
187 | argstr[0].to-argstr[0].from, | |
188 | GFP_KERNEL); | |
189 | if (!fsopt->snapdir_name) | |
190 | return -ENOMEM; | |
191 | break; | |
192 | ||
193 | /* misc */ | |
194 | case Opt_wsize: | |
195 | fsopt->wsize = intval; | |
196 | break; | |
197 | case Opt_rsize: | |
198 | fsopt->rsize = intval; | |
199 | break; | |
200 | case Opt_caps_wanted_delay_min: | |
201 | fsopt->caps_wanted_delay_min = intval; | |
202 | break; | |
203 | case Opt_caps_wanted_delay_max: | |
204 | fsopt->caps_wanted_delay_max = intval; | |
205 | break; | |
206 | case Opt_readdir_max_entries: | |
207 | fsopt->max_readdir = intval; | |
208 | break; | |
209 | case Opt_readdir_max_bytes: | |
210 | fsopt->max_readdir_bytes = intval; | |
211 | break; | |
212 | case Opt_congestion_kb: | |
213 | fsopt->congestion_kb = intval; | |
214 | break; | |
215 | case Opt_dirstat: | |
216 | fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT; | |
217 | break; | |
218 | case Opt_nodirstat: | |
219 | fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT; | |
220 | break; | |
221 | case Opt_rbytes: | |
222 | fsopt->flags |= CEPH_MOUNT_OPT_RBYTES; | |
223 | break; | |
224 | case Opt_norbytes: | |
225 | fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES; | |
226 | break; | |
227 | case Opt_noasyncreaddir: | |
228 | fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR; | |
229 | break; | |
ad1fee96 YS |
230 | case Opt_ino32: |
231 | fsopt->flags |= CEPH_MOUNT_OPT_INO32; | |
232 | break; | |
3d14c5d2 YS |
233 | default: |
234 | BUG_ON(token); | |
235 | } | |
236 | return 0; | |
c309f0ab | 237 | } |
16725b9d | 238 | |
3d14c5d2 | 239 | static void destroy_mount_options(struct ceph_mount_options *args) |
16725b9d | 240 | { |
3d14c5d2 YS |
241 | dout("destroy_mount_options %p\n", args); |
242 | kfree(args->snapdir_name); | |
243 | kfree(args); | |
244 | } | |
16725b9d | 245 | |
3d14c5d2 YS |
246 | static int strcmp_null(const char *s1, const char *s2) |
247 | { | |
248 | if (!s1 && !s2) | |
249 | return 0; | |
250 | if (s1 && !s2) | |
251 | return -1; | |
252 | if (!s1 && s2) | |
253 | return 1; | |
254 | return strcmp(s1, s2); | |
255 | } | |
16725b9d | 256 | |
3d14c5d2 YS |
257 | static int compare_mount_options(struct ceph_mount_options *new_fsopt, |
258 | struct ceph_options *new_opt, | |
259 | struct ceph_fs_client *fsc) | |
260 | { | |
261 | struct ceph_mount_options *fsopt1 = new_fsopt; | |
262 | struct ceph_mount_options *fsopt2 = fsc->mount_options; | |
263 | int ofs = offsetof(struct ceph_mount_options, snapdir_name); | |
264 | int ret; | |
16725b9d | 265 | |
3d14c5d2 YS |
266 | ret = memcmp(fsopt1, fsopt2, ofs); |
267 | if (ret) | |
268 | return ret; | |
269 | ||
270 | ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); | |
271 | if (ret) | |
272 | return ret; | |
273 | ||
274 | return ceph_compare_options(new_opt, fsc->client); | |
275 | } | |
276 | ||
277 | static int parse_mount_options(struct ceph_mount_options **pfsopt, | |
278 | struct ceph_options **popt, | |
279 | int flags, char *options, | |
280 | const char *dev_name, | |
281 | const char **path) | |
282 | { | |
283 | struct ceph_mount_options *fsopt; | |
284 | const char *dev_name_end; | |
285 | int err = -ENOMEM; | |
286 | ||
287 | fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL); | |
288 | if (!fsopt) | |
289 | return -ENOMEM; | |
290 | ||
291 | dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name); | |
292 | ||
293 | fsopt->sb_flags = flags; | |
294 | fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; | |
295 | ||
80456f86 | 296 | fsopt->rsize = CEPH_RSIZE_DEFAULT; |
3d14c5d2 | 297 | fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
50aac4fe SW |
298 | fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
299 | fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
3d14c5d2 YS |
300 | fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
301 | fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
302 | fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; | |
303 | fsopt->congestion_kb = default_congestion_kb(); | |
304 | ||
305 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ | |
306 | err = -EINVAL; | |
307 | if (!dev_name) | |
308 | goto out; | |
309 | *path = strstr(dev_name, ":/"); | |
310 | if (*path == NULL) { | |
311 | pr_err("device name is missing path (no :/ in %s)\n", | |
312 | dev_name); | |
313 | goto out; | |
314 | } | |
315 | dev_name_end = *path; | |
316 | dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name); | |
16725b9d | 317 | |
16725b9d SW |
318 | /* path on server */ |
319 | *path += 2; | |
320 | dout("server path '%s'\n", *path); | |
321 | ||
3d14c5d2 YS |
322 | err = ceph_parse_options(popt, options, dev_name, dev_name_end, |
323 | parse_fsopt_token, (void *)fsopt); | |
324 | if (err) | |
325 | goto out; | |
326 | ||
327 | /* success */ | |
328 | *pfsopt = fsopt; | |
329 | return 0; | |
16725b9d | 330 | |
7b813c46 | 331 | out: |
3d14c5d2 YS |
332 | destroy_mount_options(fsopt); |
333 | return err; | |
16725b9d SW |
334 | } |
335 | ||
3d14c5d2 YS |
336 | /** |
337 | * ceph_show_options - Show mount options in /proc/mounts | |
338 | * @m: seq_file to write to | |
339 | * @mnt: mount descriptor | |
340 | */ | |
341 | static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt) | |
16725b9d | 342 | { |
3d14c5d2 YS |
343 | struct ceph_fs_client *fsc = ceph_sb_to_client(mnt->mnt_sb); |
344 | struct ceph_mount_options *fsopt = fsc->mount_options; | |
345 | struct ceph_options *opt = fsc->client->options; | |
346 | ||
347 | if (opt->flags & CEPH_OPT_FSID) | |
348 | seq_printf(m, ",fsid=%pU", &opt->fsid); | |
349 | if (opt->flags & CEPH_OPT_NOSHARE) | |
350 | seq_puts(m, ",noshare"); | |
351 | if (opt->flags & CEPH_OPT_NOCRC) | |
352 | seq_puts(m, ",nocrc"); | |
353 | ||
354 | if (opt->name) | |
355 | seq_printf(m, ",name=%s", opt->name); | |
356 | if (opt->secret) | |
357 | seq_puts(m, ",secret=<hidden>"); | |
358 | ||
359 | if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
360 | seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); | |
361 | if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
362 | seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); | |
363 | if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT) | |
364 | seq_printf(m, ",osdtimeout=%d", opt->osd_timeout); | |
365 | if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) | |
366 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
367 | opt->osd_keepalive_timeout); | |
368 | ||
369 | if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT) | |
370 | seq_puts(m, ",dirstat"); | |
371 | if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0) | |
372 | seq_puts(m, ",norbytes"); | |
373 | if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR) | |
374 | seq_puts(m, ",noasyncreaddir"); | |
375 | ||
376 | if (fsopt->wsize) | |
377 | seq_printf(m, ",wsize=%d", fsopt->wsize); | |
80456f86 | 378 | if (fsopt->rsize != CEPH_RSIZE_DEFAULT) |
3d14c5d2 YS |
379 | seq_printf(m, ",rsize=%d", fsopt->rsize); |
380 | if (fsopt->congestion_kb != default_congestion_kb()) | |
381 | seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb); | |
382 | if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
383 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
384 | fsopt->caps_wanted_delay_min); | |
385 | if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
386 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
387 | fsopt->caps_wanted_delay_max); | |
388 | if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
389 | seq_printf(m, ",cap_release_safety=%d", | |
390 | fsopt->cap_release_safety); | |
391 | if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
392 | seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir); | |
393 | if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) | |
394 | seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes); | |
395 | if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
396 | seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name); | |
397 | return 0; | |
16725b9d SW |
398 | } |
399 | ||
400 | /* | |
3d14c5d2 YS |
401 | * handle any mon messages the standard library doesn't understand. |
402 | * return error if we don't either. | |
16725b9d | 403 | */ |
3d14c5d2 | 404 | static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg) |
16725b9d | 405 | { |
3d14c5d2 YS |
406 | struct ceph_fs_client *fsc = client->private; |
407 | int type = le16_to_cpu(msg->hdr.type); | |
408 | ||
409 | switch (type) { | |
410 | case CEPH_MSG_MDS_MAP: | |
411 | ceph_mdsc_handle_map(fsc->mdsc, msg); | |
412 | return 0; | |
413 | ||
414 | default: | |
415 | return -1; | |
416 | } | |
417 | } | |
418 | ||
419 | /* | |
420 | * create a new fs client | |
421 | */ | |
422 | struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, | |
423 | struct ceph_options *opt) | |
424 | { | |
425 | struct ceph_fs_client *fsc; | |
16725b9d SW |
426 | int err = -ENOMEM; |
427 | ||
3d14c5d2 YS |
428 | fsc = kzalloc(sizeof(*fsc), GFP_KERNEL); |
429 | if (!fsc) | |
16725b9d SW |
430 | return ERR_PTR(-ENOMEM); |
431 | ||
3d14c5d2 YS |
432 | fsc->client = ceph_create_client(opt, fsc); |
433 | if (IS_ERR(fsc->client)) { | |
434 | err = PTR_ERR(fsc->client); | |
435 | goto fail; | |
436 | } | |
437 | fsc->client->extra_mon_dispatch = extra_mon_dispatch; | |
14303d20 SW |
438 | fsc->client->supported_features |= CEPH_FEATURE_FLOCK | |
439 | CEPH_FEATURE_DIRLAYOUTHASH; | |
3d14c5d2 | 440 | fsc->client->monc.want_mdsmap = 1; |
16725b9d | 441 | |
3d14c5d2 | 442 | fsc->mount_options = fsopt; |
16725b9d | 443 | |
3d14c5d2 YS |
444 | fsc->sb = NULL; |
445 | fsc->mount_state = CEPH_MOUNT_MOUNTING; | |
16725b9d | 446 | |
3d14c5d2 | 447 | atomic_long_set(&fsc->writeback_count, 0); |
16725b9d | 448 | |
3d14c5d2 | 449 | err = bdi_init(&fsc->backing_dev_info); |
859e7b14 | 450 | if (err < 0) |
3d14c5d2 | 451 | goto fail_client; |
859e7b14 | 452 | |
16725b9d | 453 | err = -ENOMEM; |
01e6acc4 TH |
454 | /* |
455 | * The number of concurrent works can be high but they don't need | |
456 | * to be processed in parallel, limit concurrency. | |
457 | */ | |
458 | fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); | |
3d14c5d2 | 459 | if (fsc->wb_wq == NULL) |
859e7b14 | 460 | goto fail_bdi; |
01e6acc4 | 461 | fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); |
3d14c5d2 | 462 | if (fsc->pg_inv_wq == NULL) |
16725b9d | 463 | goto fail_wb_wq; |
01e6acc4 | 464 | fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); |
3d14c5d2 | 465 | if (fsc->trunc_wq == NULL) |
16725b9d SW |
466 | goto fail_pg_inv_wq; |
467 | ||
b9bfb93c SW |
468 | /* set up mempools */ |
469 | err = -ENOMEM; | |
3d14c5d2 YS |
470 | fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, |
471 | fsc->mount_options->wsize >> PAGE_CACHE_SHIFT); | |
472 | if (!fsc->wb_pagevec_pool) | |
b9bfb93c SW |
473 | goto fail_trunc_wq; |
474 | ||
85ccce43 | 475 | /* caps */ |
3d14c5d2 YS |
476 | fsc->min_caps = fsopt->max_readdir; |
477 | ||
478 | return fsc; | |
b9bfb93c | 479 | |
16725b9d | 480 | fail_trunc_wq: |
3d14c5d2 | 481 | destroy_workqueue(fsc->trunc_wq); |
16725b9d | 482 | fail_pg_inv_wq: |
3d14c5d2 | 483 | destroy_workqueue(fsc->pg_inv_wq); |
16725b9d | 484 | fail_wb_wq: |
3d14c5d2 | 485 | destroy_workqueue(fsc->wb_wq); |
859e7b14 | 486 | fail_bdi: |
3d14c5d2 YS |
487 | bdi_destroy(&fsc->backing_dev_info); |
488 | fail_client: | |
489 | ceph_destroy_client(fsc->client); | |
16725b9d | 490 | fail: |
3d14c5d2 | 491 | kfree(fsc); |
16725b9d SW |
492 | return ERR_PTR(err); |
493 | } | |
494 | ||
3d14c5d2 | 495 | void destroy_fs_client(struct ceph_fs_client *fsc) |
16725b9d | 496 | { |
3d14c5d2 | 497 | dout("destroy_fs_client %p\n", fsc); |
16725b9d | 498 | |
3d14c5d2 YS |
499 | destroy_workqueue(fsc->wb_wq); |
500 | destroy_workqueue(fsc->pg_inv_wq); | |
501 | destroy_workqueue(fsc->trunc_wq); | |
16725b9d | 502 | |
3d14c5d2 | 503 | bdi_destroy(&fsc->backing_dev_info); |
a922d38f | 504 | |
3d14c5d2 | 505 | mempool_destroy(fsc->wb_pagevec_pool); |
16725b9d | 506 | |
3d14c5d2 | 507 | destroy_mount_options(fsc->mount_options); |
5dfc589a | 508 | |
3d14c5d2 | 509 | ceph_fs_debugfs_cleanup(fsc); |
16725b9d | 510 | |
3d14c5d2 | 511 | ceph_destroy_client(fsc->client); |
16725b9d | 512 | |
3d14c5d2 YS |
513 | kfree(fsc); |
514 | dout("destroy_fs_client %p done\n", fsc); | |
16725b9d SW |
515 | } |
516 | ||
0743304d | 517 | /* |
3d14c5d2 | 518 | * caches |
0743304d | 519 | */ |
3d14c5d2 YS |
520 | struct kmem_cache *ceph_inode_cachep; |
521 | struct kmem_cache *ceph_cap_cachep; | |
522 | struct kmem_cache *ceph_dentry_cachep; | |
523 | struct kmem_cache *ceph_file_cachep; | |
524 | ||
525 | static void ceph_inode_init_once(void *foo) | |
0743304d | 526 | { |
3d14c5d2 YS |
527 | struct ceph_inode_info *ci = foo; |
528 | inode_init_once(&ci->vfs_inode); | |
529 | } | |
530 | ||
531 | static int __init init_caches(void) | |
532 | { | |
533 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
534 | sizeof(struct ceph_inode_info), | |
535 | __alignof__(struct ceph_inode_info), | |
536 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
537 | ceph_inode_init_once); | |
538 | if (ceph_inode_cachep == NULL) | |
539 | return -ENOMEM; | |
540 | ||
541 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
542 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
543 | if (ceph_cap_cachep == NULL) | |
544 | goto bad_cap; | |
545 | ||
546 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
547 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
548 | if (ceph_dentry_cachep == NULL) | |
549 | goto bad_dentry; | |
550 | ||
551 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
552 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
553 | if (ceph_file_cachep == NULL) | |
554 | goto bad_file; | |
555 | ||
0743304d | 556 | return 0; |
3d14c5d2 YS |
557 | |
558 | bad_file: | |
559 | kmem_cache_destroy(ceph_dentry_cachep); | |
560 | bad_dentry: | |
561 | kmem_cache_destroy(ceph_cap_cachep); | |
562 | bad_cap: | |
563 | kmem_cache_destroy(ceph_inode_cachep); | |
564 | return -ENOMEM; | |
0743304d SW |
565 | } |
566 | ||
3d14c5d2 YS |
567 | static void destroy_caches(void) |
568 | { | |
569 | kmem_cache_destroy(ceph_inode_cachep); | |
570 | kmem_cache_destroy(ceph_cap_cachep); | |
571 | kmem_cache_destroy(ceph_dentry_cachep); | |
572 | kmem_cache_destroy(ceph_file_cachep); | |
573 | } | |
574 | ||
575 | ||
16725b9d | 576 | /* |
3d14c5d2 YS |
577 | * ceph_umount_begin - initiate forced umount. Tear down down the |
578 | * mount, skipping steps that may hang while waiting for server(s). | |
16725b9d | 579 | */ |
3d14c5d2 | 580 | static void ceph_umount_begin(struct super_block *sb) |
16725b9d | 581 | { |
3d14c5d2 YS |
582 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
583 | ||
584 | dout("ceph_umount_begin - starting forced umount\n"); | |
585 | if (!fsc) | |
586 | return; | |
587 | fsc->mount_state = CEPH_MOUNT_SHUTDOWN; | |
588 | return; | |
16725b9d SW |
589 | } |
590 | ||
3d14c5d2 YS |
591 | static const struct super_operations ceph_super_ops = { |
592 | .alloc_inode = ceph_alloc_inode, | |
593 | .destroy_inode = ceph_destroy_inode, | |
594 | .write_inode = ceph_write_inode, | |
595 | .sync_fs = ceph_sync_fs, | |
596 | .put_super = ceph_put_super, | |
597 | .show_options = ceph_show_options, | |
598 | .statfs = ceph_statfs, | |
599 | .umount_begin = ceph_umount_begin, | |
600 | }; | |
601 | ||
16725b9d SW |
602 | /* |
603 | * Bootstrap mount by opening the root directory. Note the mount | |
604 | * @started time from caller, and time out if this takes too long. | |
605 | */ | |
3d14c5d2 | 606 | static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, |
16725b9d SW |
607 | const char *path, |
608 | unsigned long started) | |
609 | { | |
3d14c5d2 | 610 | struct ceph_mds_client *mdsc = fsc->mdsc; |
16725b9d SW |
611 | struct ceph_mds_request *req = NULL; |
612 | int err; | |
613 | struct dentry *root; | |
614 | ||
615 | /* open dir */ | |
616 | dout("open_root_inode opening '%s'\n", path); | |
617 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
618 | if (IS_ERR(req)) | |
7e34bc52 | 619 | return ERR_CAST(req); |
16725b9d SW |
620 | req->r_path1 = kstrdup(path, GFP_NOFS); |
621 | req->r_ino1.ino = CEPH_INO_ROOT; | |
622 | req->r_ino1.snap = CEPH_NOSNAP; | |
623 | req->r_started = started; | |
3d14c5d2 | 624 | req->r_timeout = fsc->client->options->mount_timeout * HZ; |
16725b9d SW |
625 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
626 | req->r_num_caps = 2; | |
627 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
628 | if (err == 0) { | |
629 | dout("open_root_inode success\n"); | |
630 | if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && | |
3d14c5d2 | 631 | fsc->sb->s_root == NULL) |
16725b9d SW |
632 | root = d_alloc_root(req->r_target_inode); |
633 | else | |
634 | root = d_obtain_alias(req->r_target_inode); | |
635 | req->r_target_inode = NULL; | |
636 | dout("open_root_inode success, root dentry is %p\n", root); | |
637 | } else { | |
638 | root = ERR_PTR(err); | |
639 | } | |
640 | ceph_mdsc_put_request(req); | |
641 | return root; | |
642 | } | |
643 | ||
3d14c5d2 YS |
644 | |
645 | ||
646 | ||
16725b9d SW |
647 | /* |
648 | * mount: join the ceph cluster, and open root directory. | |
649 | */ | |
a7f9fb20 | 650 | static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, |
16725b9d SW |
651 | const char *path) |
652 | { | |
16725b9d | 653 | int err; |
16725b9d SW |
654 | unsigned long started = jiffies; /* note the start time */ |
655 | struct dentry *root; | |
3d14c5d2 | 656 | int first = 0; /* first vfsmount for this super_block */ |
16725b9d SW |
657 | |
658 | dout("mount start\n"); | |
3d14c5d2 | 659 | mutex_lock(&fsc->client->mount_mutex); |
16725b9d | 660 | |
3d14c5d2 | 661 | err = __ceph_open_session(fsc->client, started); |
16725b9d SW |
662 | if (err < 0) |
663 | goto out; | |
664 | ||
16725b9d | 665 | dout("mount opening root\n"); |
3d14c5d2 | 666 | root = open_root_dentry(fsc, "", started); |
16725b9d SW |
667 | if (IS_ERR(root)) { |
668 | err = PTR_ERR(root); | |
669 | goto out; | |
670 | } | |
3d14c5d2 | 671 | if (fsc->sb->s_root) { |
16725b9d | 672 | dput(root); |
3d14c5d2 YS |
673 | } else { |
674 | fsc->sb->s_root = root; | |
675 | first = 1; | |
676 | ||
677 | err = ceph_fs_debugfs_init(fsc); | |
678 | if (err < 0) | |
679 | goto fail; | |
680 | } | |
16725b9d SW |
681 | |
682 | if (path[0] == 0) { | |
683 | dget(root); | |
684 | } else { | |
685 | dout("mount opening base mountpoint\n"); | |
3d14c5d2 | 686 | root = open_root_dentry(fsc, path, started); |
16725b9d SW |
687 | if (IS_ERR(root)) { |
688 | err = PTR_ERR(root); | |
3d14c5d2 | 689 | goto fail; |
16725b9d SW |
690 | } |
691 | } | |
692 | ||
3d14c5d2 | 693 | fsc->mount_state = CEPH_MOUNT_MOUNTED; |
16725b9d | 694 | dout("mount success\n"); |
a7f9fb20 AV |
695 | mutex_unlock(&fsc->client->mount_mutex); |
696 | return root; | |
16725b9d SW |
697 | |
698 | out: | |
3d14c5d2 | 699 | mutex_unlock(&fsc->client->mount_mutex); |
a7f9fb20 | 700 | return ERR_PTR(err); |
3d14c5d2 YS |
701 | |
702 | fail: | |
703 | if (first) { | |
704 | dput(fsc->sb->s_root); | |
705 | fsc->sb->s_root = NULL; | |
706 | } | |
707 | goto out; | |
16725b9d SW |
708 | } |
709 | ||
710 | static int ceph_set_super(struct super_block *s, void *data) | |
711 | { | |
3d14c5d2 | 712 | struct ceph_fs_client *fsc = data; |
16725b9d SW |
713 | int ret; |
714 | ||
715 | dout("set_super %p data %p\n", s, data); | |
716 | ||
3d14c5d2 | 717 | s->s_flags = fsc->mount_options->sb_flags; |
16725b9d SW |
718 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
719 | ||
3d14c5d2 YS |
720 | s->s_fs_info = fsc; |
721 | fsc->sb = s; | |
16725b9d SW |
722 | |
723 | s->s_op = &ceph_super_ops; | |
724 | s->s_export_op = &ceph_export_ops; | |
725 | ||
726 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
727 | ||
728 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
729 | if (ret != 0) | |
730 | goto fail; | |
731 | ||
732 | return ret; | |
733 | ||
734 | fail: | |
735 | s->s_fs_info = NULL; | |
3d14c5d2 | 736 | fsc->sb = NULL; |
16725b9d SW |
737 | return ret; |
738 | } | |
739 | ||
740 | /* | |
741 | * share superblock if same fs AND options | |
742 | */ | |
743 | static int ceph_compare_super(struct super_block *sb, void *data) | |
744 | { | |
3d14c5d2 YS |
745 | struct ceph_fs_client *new = data; |
746 | struct ceph_mount_options *fsopt = new->mount_options; | |
747 | struct ceph_options *opt = new->client->options; | |
748 | struct ceph_fs_client *other = ceph_sb_to_client(sb); | |
16725b9d SW |
749 | |
750 | dout("ceph_compare_super %p\n", sb); | |
3d14c5d2 YS |
751 | |
752 | if (compare_mount_options(fsopt, opt, other)) { | |
753 | dout("monitor(s)/mount options don't match\n"); | |
754 | return 0; | |
16725b9d | 755 | } |
3d14c5d2 YS |
756 | if ((opt->flags & CEPH_OPT_FSID) && |
757 | ceph_fsid_compare(&opt->fsid, &other->client->fsid)) { | |
758 | dout("fsid doesn't match\n"); | |
759 | return 0; | |
760 | } | |
761 | if (fsopt->sb_flags != other->mount_options->sb_flags) { | |
16725b9d SW |
762 | dout("flags differ\n"); |
763 | return 0; | |
764 | } | |
765 | return 1; | |
766 | } | |
767 | ||
768 | /* | |
769 | * construct our own bdi so we can control readahead, etc. | |
770 | */ | |
00d5643e | 771 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 772 | |
3d14c5d2 YS |
773 | static int ceph_register_bdi(struct super_block *sb, |
774 | struct ceph_fs_client *fsc) | |
16725b9d SW |
775 | { |
776 | int err; | |
777 | ||
16725b9d | 778 | /* set ra_pages based on rsize mount option? */ |
3d14c5d2 YS |
779 | if (fsc->mount_options->rsize >= PAGE_CACHE_SIZE) |
780 | fsc->backing_dev_info.ra_pages = | |
781 | (fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1) | |
16725b9d | 782 | >> PAGE_SHIFT; |
3d14c5d2 | 783 | err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d", |
31e0cf8f | 784 | atomic_long_inc_return(&bdi_seq)); |
5dfc589a | 785 | if (!err) |
3d14c5d2 | 786 | sb->s_bdi = &fsc->backing_dev_info; |
16725b9d SW |
787 | return err; |
788 | } | |
789 | ||
a7f9fb20 AV |
790 | static struct dentry *ceph_mount(struct file_system_type *fs_type, |
791 | int flags, const char *dev_name, void *data) | |
16725b9d SW |
792 | { |
793 | struct super_block *sb; | |
3d14c5d2 | 794 | struct ceph_fs_client *fsc; |
a7f9fb20 | 795 | struct dentry *res; |
16725b9d SW |
796 | int err; |
797 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 798 | const char *path = NULL; |
3d14c5d2 YS |
799 | struct ceph_mount_options *fsopt = NULL; |
800 | struct ceph_options *opt = NULL; | |
16725b9d | 801 | |
a7f9fb20 | 802 | dout("ceph_mount\n"); |
3d14c5d2 | 803 | err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); |
a7f9fb20 AV |
804 | if (err < 0) { |
805 | res = ERR_PTR(err); | |
6b805185 | 806 | goto out_final; |
a7f9fb20 | 807 | } |
16725b9d SW |
808 | |
809 | /* create client (which we may/may not use) */ | |
3d14c5d2 YS |
810 | fsc = create_fs_client(fsopt, opt); |
811 | if (IS_ERR(fsc)) { | |
a7f9fb20 | 812 | res = ERR_CAST(fsc); |
3d14c5d2 YS |
813 | kfree(fsopt); |
814 | kfree(opt); | |
6b805185 SW |
815 | goto out_final; |
816 | } | |
16725b9d | 817 | |
3d14c5d2 | 818 | err = ceph_mdsc_init(fsc); |
a7f9fb20 AV |
819 | if (err < 0) { |
820 | res = ERR_PTR(err); | |
3d14c5d2 | 821 | goto out; |
a7f9fb20 | 822 | } |
3d14c5d2 YS |
823 | |
824 | if (ceph_test_opt(fsc->client, NOSHARE)) | |
16725b9d | 825 | compare_super = NULL; |
3d14c5d2 | 826 | sb = sget(fs_type, compare_super, ceph_set_super, fsc); |
16725b9d | 827 | if (IS_ERR(sb)) { |
a7f9fb20 | 828 | res = ERR_CAST(sb); |
16725b9d SW |
829 | goto out; |
830 | } | |
831 | ||
3d14c5d2 YS |
832 | if (ceph_sb_to_client(sb) != fsc) { |
833 | ceph_mdsc_destroy(fsc); | |
834 | destroy_fs_client(fsc); | |
835 | fsc = ceph_sb_to_client(sb); | |
836 | dout("get_sb got existing client %p\n", fsc); | |
16725b9d | 837 | } else { |
3d14c5d2 YS |
838 | dout("get_sb using new client %p\n", fsc); |
839 | err = ceph_register_bdi(sb, fsc); | |
a7f9fb20 AV |
840 | if (err < 0) { |
841 | res = ERR_PTR(err); | |
16725b9d | 842 | goto out_splat; |
a7f9fb20 | 843 | } |
16725b9d SW |
844 | } |
845 | ||
a7f9fb20 AV |
846 | res = ceph_real_mount(fsc, path); |
847 | if (IS_ERR(res)) | |
16725b9d | 848 | goto out_splat; |
a7f9fb20 AV |
849 | dout("root %p inode %p ino %llx.%llx\n", res, |
850 | res->d_inode, ceph_vinop(res->d_inode)); | |
851 | return res; | |
16725b9d SW |
852 | |
853 | out_splat: | |
3d14c5d2 | 854 | ceph_mdsc_close_sessions(fsc->mdsc); |
3981f2e2 | 855 | deactivate_locked_super(sb); |
16725b9d SW |
856 | goto out_final; |
857 | ||
858 | out: | |
3d14c5d2 YS |
859 | ceph_mdsc_destroy(fsc); |
860 | destroy_fs_client(fsc); | |
16725b9d | 861 | out_final: |
a7f9fb20 AV |
862 | dout("ceph_mount fail %ld\n", PTR_ERR(res)); |
863 | return res; | |
16725b9d SW |
864 | } |
865 | ||
866 | static void ceph_kill_sb(struct super_block *s) | |
867 | { | |
3d14c5d2 | 868 | struct ceph_fs_client *fsc = ceph_sb_to_client(s); |
16725b9d | 869 | dout("kill_sb %p\n", s); |
3d14c5d2 | 870 | ceph_mdsc_pre_umount(fsc->mdsc); |
16725b9d | 871 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
3d14c5d2 YS |
872 | ceph_mdsc_destroy(fsc); |
873 | destroy_fs_client(fsc); | |
16725b9d SW |
874 | } |
875 | ||
876 | static struct file_system_type ceph_fs_type = { | |
877 | .owner = THIS_MODULE, | |
878 | .name = "ceph", | |
a7f9fb20 | 879 | .mount = ceph_mount, |
16725b9d SW |
880 | .kill_sb = ceph_kill_sb, |
881 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
882 | }; | |
883 | ||
884 | #define _STRINGIFY(x) #x | |
885 | #define STRINGIFY(x) _STRINGIFY(x) | |
886 | ||
887 | static int __init init_ceph(void) | |
888 | { | |
3d14c5d2 | 889 | int ret = init_caches(); |
16725b9d | 890 | if (ret) |
3d14c5d2 | 891 | goto out; |
16725b9d | 892 | |
16725b9d SW |
893 | ret = register_filesystem(&ceph_fs_type); |
894 | if (ret) | |
895 | goto out_icache; | |
896 | ||
3d14c5d2 YS |
897 | pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL); |
898 | ||
16725b9d SW |
899 | return 0; |
900 | ||
901 | out_icache: | |
902 | destroy_caches(); | |
16725b9d SW |
903 | out: |
904 | return ret; | |
905 | } | |
906 | ||
907 | static void __exit exit_ceph(void) | |
908 | { | |
909 | dout("exit_ceph\n"); | |
910 | unregister_filesystem(&ceph_fs_type); | |
16725b9d | 911 | destroy_caches(); |
16725b9d SW |
912 | } |
913 | ||
914 | module_init(init_ceph); | |
915 | module_exit(exit_ceph); | |
916 | ||
917 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
918 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
919 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
920 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
921 | MODULE_LICENSE("GPL"); |