Commit | Line | Data |
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16725b9d SW |
1 | |
2 | #include "ceph_debug.h" | |
3 | ||
4 | #include <linux/backing-dev.h> | |
5 | #include <linux/fs.h> | |
6 | #include <linux/inet.h> | |
7 | #include <linux/in6.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/mount.h> | |
10 | #include <linux/parser.h> | |
11 | #include <linux/rwsem.h> | |
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> | |
17 | #include <linux/version.h> | |
18 | #include <linux/vmalloc.h> | |
19 | ||
16725b9d SW |
20 | #include "decode.h" |
21 | #include "super.h" | |
22 | #include "mon_client.h" | |
0743304d | 23 | #include "auth.h" |
16725b9d SW |
24 | |
25 | /* | |
26 | * Ceph superblock operations | |
27 | * | |
28 | * Handle the basics of mounting, unmounting. | |
29 | */ | |
30 | ||
31 | ||
32 | /* | |
33 | * find filename portion of a path (/foo/bar/baz -> baz) | |
34 | */ | |
35 | const char *ceph_file_part(const char *s, int len) | |
36 | { | |
37 | const char *e = s + len; | |
38 | ||
39 | while (e != s && *(e-1) != '/') | |
40 | e--; | |
41 | return e; | |
42 | } | |
43 | ||
44 | ||
45 | /* | |
46 | * super ops | |
47 | */ | |
48 | static void ceph_put_super(struct super_block *s) | |
49 | { | |
50 | struct ceph_client *cl = ceph_client(s); | |
51 | ||
52 | dout("put_super\n"); | |
53 | ceph_mdsc_close_sessions(&cl->mdsc); | |
54 | return; | |
55 | } | |
56 | ||
57 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
58 | { | |
59 | struct ceph_client *client = ceph_inode_to_client(dentry->d_inode); | |
60 | struct ceph_monmap *monmap = client->monc.monmap; | |
61 | struct ceph_statfs st; | |
62 | u64 fsid; | |
63 | int err; | |
64 | ||
65 | dout("statfs\n"); | |
66 | err = ceph_monc_do_statfs(&client->monc, &st); | |
67 | if (err < 0) | |
68 | return err; | |
69 | ||
70 | /* fill in kstatfs */ | |
71 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
72 | ||
73 | /* | |
74 | * express utilization in terms of large blocks to avoid | |
75 | * overflow on 32-bit machines. | |
76 | */ | |
77 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
78 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
79 | buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >> | |
80 | (CEPH_BLOCK_SHIFT-10); | |
81 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
82 | ||
83 | buf->f_files = le64_to_cpu(st.num_objects); | |
84 | buf->f_ffree = -1; | |
85 | buf->f_namelen = PATH_MAX; | |
86 | buf->f_frsize = PAGE_CACHE_SIZE; | |
87 | ||
88 | /* leave fsid little-endian, regardless of host endianness */ | |
89 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
90 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
91 | buf->f_fsid.val[1] = fsid >> 32; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | ||
97 | static int ceph_syncfs(struct super_block *sb, int wait) | |
98 | { | |
99 | dout("sync_fs %d\n", wait); | |
100 | ceph_osdc_sync(&ceph_client(sb)->osdc); | |
101 | ceph_mdsc_sync(&ceph_client(sb)->mdsc); | |
f2cf418c | 102 | dout("sync_fs %d done\n", wait); |
16725b9d SW |
103 | return 0; |
104 | } | |
105 | ||
106 | ||
107 | /** | |
108 | * ceph_show_options - Show mount options in /proc/mounts | |
109 | * @m: seq_file to write to | |
110 | * @mnt: mount descriptor | |
111 | */ | |
112 | static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt) | |
113 | { | |
114 | struct ceph_client *client = ceph_sb_to_client(mnt->mnt_sb); | |
6b805185 | 115 | struct ceph_mount_args *args = client->mount_args; |
16725b9d SW |
116 | |
117 | if (args->flags & CEPH_OPT_FSID) | |
118 | seq_printf(m, ",fsidmajor=%llu,fsidminor%llu", | |
119 | le64_to_cpu(*(__le64 *)&args->fsid.fsid[0]), | |
120 | le64_to_cpu(*(__le64 *)&args->fsid.fsid[8])); | |
121 | if (args->flags & CEPH_OPT_NOSHARE) | |
122 | seq_puts(m, ",noshare"); | |
123 | if (args->flags & CEPH_OPT_DIRSTAT) | |
124 | seq_puts(m, ",dirstat"); | |
125 | if ((args->flags & CEPH_OPT_RBYTES) == 0) | |
126 | seq_puts(m, ",norbytes"); | |
127 | if (args->flags & CEPH_OPT_NOCRC) | |
128 | seq_puts(m, ",nocrc"); | |
129 | if (args->flags & CEPH_OPT_NOASYNCREADDIR) | |
130 | seq_puts(m, ",noasyncreaddir"); | |
131 | if (strcmp(args->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
132 | seq_printf(m, ",snapdirname=%s", args->snapdir_name); | |
4e7a5dcd SW |
133 | if (args->name) |
134 | seq_printf(m, ",name=%s", args->name); | |
16725b9d SW |
135 | if (args->secret) |
136 | seq_puts(m, ",secret=<hidden>"); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | /* | |
141 | * caches | |
142 | */ | |
143 | struct kmem_cache *ceph_inode_cachep; | |
144 | struct kmem_cache *ceph_cap_cachep; | |
145 | struct kmem_cache *ceph_dentry_cachep; | |
146 | struct kmem_cache *ceph_file_cachep; | |
147 | ||
148 | static void ceph_inode_init_once(void *foo) | |
149 | { | |
150 | struct ceph_inode_info *ci = foo; | |
151 | inode_init_once(&ci->vfs_inode); | |
152 | } | |
153 | ||
2baba250 YS |
154 | static int default_congestion_kb(void) |
155 | { | |
156 | int congestion_kb; | |
157 | ||
158 | /* | |
159 | * Copied from NFS | |
160 | * | |
161 | * congestion size, scale with available memory. | |
162 | * | |
163 | * 64MB: 8192k | |
164 | * 128MB: 11585k | |
165 | * 256MB: 16384k | |
166 | * 512MB: 23170k | |
167 | * 1GB: 32768k | |
168 | * 2GB: 46340k | |
169 | * 4GB: 65536k | |
170 | * 8GB: 92681k | |
171 | * 16GB: 131072k | |
172 | * | |
173 | * This allows larger machines to have larger/more transfers. | |
174 | * Limit the default to 256M | |
175 | */ | |
176 | congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); | |
177 | if (congestion_kb > 256*1024) | |
178 | congestion_kb = 256*1024; | |
179 | ||
180 | return congestion_kb; | |
181 | } | |
182 | ||
16725b9d SW |
183 | static int __init init_caches(void) |
184 | { | |
185 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
186 | sizeof(struct ceph_inode_info), | |
187 | __alignof__(struct ceph_inode_info), | |
188 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
189 | ceph_inode_init_once); | |
190 | if (ceph_inode_cachep == NULL) | |
191 | return -ENOMEM; | |
192 | ||
193 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
194 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
195 | if (ceph_cap_cachep == NULL) | |
196 | goto bad_cap; | |
197 | ||
198 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
199 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
200 | if (ceph_dentry_cachep == NULL) | |
201 | goto bad_dentry; | |
202 | ||
203 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
204 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
205 | if (ceph_file_cachep == NULL) | |
206 | goto bad_file; | |
207 | ||
208 | return 0; | |
209 | ||
210 | bad_file: | |
211 | kmem_cache_destroy(ceph_dentry_cachep); | |
212 | bad_dentry: | |
213 | kmem_cache_destroy(ceph_cap_cachep); | |
214 | bad_cap: | |
215 | kmem_cache_destroy(ceph_inode_cachep); | |
216 | return -ENOMEM; | |
217 | } | |
218 | ||
219 | static void destroy_caches(void) | |
220 | { | |
221 | kmem_cache_destroy(ceph_inode_cachep); | |
222 | kmem_cache_destroy(ceph_cap_cachep); | |
223 | kmem_cache_destroy(ceph_dentry_cachep); | |
224 | kmem_cache_destroy(ceph_file_cachep); | |
225 | } | |
226 | ||
227 | ||
228 | /* | |
229 | * ceph_umount_begin - initiate forced umount. Tear down down the | |
230 | * mount, skipping steps that may hang while waiting for server(s). | |
231 | */ | |
232 | static void ceph_umount_begin(struct super_block *sb) | |
233 | { | |
234 | struct ceph_client *client = ceph_sb_to_client(sb); | |
235 | ||
236 | dout("ceph_umount_begin - starting forced umount\n"); | |
237 | if (!client) | |
238 | return; | |
239 | client->mount_state = CEPH_MOUNT_SHUTDOWN; | |
240 | return; | |
241 | } | |
242 | ||
243 | static const struct super_operations ceph_super_ops = { | |
244 | .alloc_inode = ceph_alloc_inode, | |
245 | .destroy_inode = ceph_destroy_inode, | |
246 | .write_inode = ceph_write_inode, | |
247 | .sync_fs = ceph_syncfs, | |
248 | .put_super = ceph_put_super, | |
249 | .show_options = ceph_show_options, | |
250 | .statfs = ceph_statfs, | |
251 | .umount_begin = ceph_umount_begin, | |
252 | }; | |
253 | ||
254 | ||
255 | const char *ceph_msg_type_name(int type) | |
256 | { | |
257 | switch (type) { | |
258 | case CEPH_MSG_SHUTDOWN: return "shutdown"; | |
259 | case CEPH_MSG_PING: return "ping"; | |
4e7a5dcd SW |
260 | case CEPH_MSG_AUTH: return "auth"; |
261 | case CEPH_MSG_AUTH_REPLY: return "auth_reply"; | |
16725b9d SW |
262 | case CEPH_MSG_MON_MAP: return "mon_map"; |
263 | case CEPH_MSG_MON_GET_MAP: return "mon_get_map"; | |
264 | case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe"; | |
265 | case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack"; | |
16725b9d SW |
266 | case CEPH_MSG_STATFS: return "statfs"; |
267 | case CEPH_MSG_STATFS_REPLY: return "statfs_reply"; | |
16725b9d SW |
268 | case CEPH_MSG_MDS_MAP: return "mds_map"; |
269 | case CEPH_MSG_CLIENT_SESSION: return "client_session"; | |
270 | case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect"; | |
271 | case CEPH_MSG_CLIENT_REQUEST: return "client_request"; | |
272 | case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward"; | |
273 | case CEPH_MSG_CLIENT_REPLY: return "client_reply"; | |
274 | case CEPH_MSG_CLIENT_CAPS: return "client_caps"; | |
275 | case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; | |
276 | case CEPH_MSG_CLIENT_SNAP: return "client_snap"; | |
277 | case CEPH_MSG_CLIENT_LEASE: return "client_lease"; | |
16725b9d SW |
278 | case CEPH_MSG_OSD_MAP: return "osd_map"; |
279 | case CEPH_MSG_OSD_OP: return "osd_op"; | |
280 | case CEPH_MSG_OSD_OPREPLY: return "osd_opreply"; | |
281 | default: return "unknown"; | |
282 | } | |
283 | } | |
284 | ||
285 | ||
286 | /* | |
287 | * mount options | |
288 | */ | |
289 | enum { | |
290 | Opt_fsidmajor, | |
291 | Opt_fsidminor, | |
292 | Opt_monport, | |
293 | Opt_wsize, | |
294 | Opt_rsize, | |
295 | Opt_osdtimeout, | |
422d2cb8 | 296 | Opt_osdkeepalivetimeout, |
16725b9d | 297 | Opt_mount_timeout, |
f5a2041b | 298 | Opt_osd_idle_ttl, |
16725b9d SW |
299 | Opt_caps_wanted_delay_min, |
300 | Opt_caps_wanted_delay_max, | |
301 | Opt_readdir_max_entries, | |
2baba250 | 302 | Opt_congestion_kb, |
e53c2fe0 | 303 | Opt_last_int, |
16725b9d SW |
304 | /* int args above */ |
305 | Opt_snapdirname, | |
4e7a5dcd | 306 | Opt_name, |
16725b9d | 307 | Opt_secret, |
e53c2fe0 | 308 | Opt_last_string, |
16725b9d SW |
309 | /* string args above */ |
310 | Opt_ip, | |
311 | Opt_noshare, | |
312 | Opt_dirstat, | |
313 | Opt_nodirstat, | |
314 | Opt_rbytes, | |
315 | Opt_norbytes, | |
316 | Opt_nocrc, | |
317 | Opt_noasyncreaddir, | |
318 | }; | |
319 | ||
320 | static match_table_t arg_tokens = { | |
321 | {Opt_fsidmajor, "fsidmajor=%ld"}, | |
322 | {Opt_fsidminor, "fsidminor=%ld"}, | |
323 | {Opt_monport, "monport=%d"}, | |
324 | {Opt_wsize, "wsize=%d"}, | |
325 | {Opt_rsize, "rsize=%d"}, | |
326 | {Opt_osdtimeout, "osdtimeout=%d"}, | |
422d2cb8 | 327 | {Opt_osdkeepalivetimeout, "osdkeepalive=%d"}, |
16725b9d | 328 | {Opt_mount_timeout, "mount_timeout=%d"}, |
f5a2041b | 329 | {Opt_osd_idle_ttl, "osd_idle_ttl=%d"}, |
16725b9d SW |
330 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
331 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
332 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, | |
2baba250 | 333 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
334 | /* int args above */ |
335 | {Opt_snapdirname, "snapdirname=%s"}, | |
4e7a5dcd | 336 | {Opt_name, "name=%s"}, |
16725b9d SW |
337 | {Opt_secret, "secret=%s"}, |
338 | /* string args above */ | |
339 | {Opt_ip, "ip=%s"}, | |
340 | {Opt_noshare, "noshare"}, | |
341 | {Opt_dirstat, "dirstat"}, | |
342 | {Opt_nodirstat, "nodirstat"}, | |
343 | {Opt_rbytes, "rbytes"}, | |
344 | {Opt_norbytes, "norbytes"}, | |
345 | {Opt_nocrc, "nocrc"}, | |
346 | {Opt_noasyncreaddir, "noasyncreaddir"}, | |
347 | {-1, NULL} | |
348 | }; | |
349 | ||
350 | ||
6b805185 SW |
351 | static struct ceph_mount_args *parse_mount_args(int flags, char *options, |
352 | const char *dev_name, | |
353 | const char **path) | |
16725b9d | 354 | { |
6b805185 | 355 | struct ceph_mount_args *args; |
16725b9d | 356 | const char *c; |
6b805185 | 357 | int err = -ENOMEM; |
16725b9d | 358 | substring_t argstr[MAX_OPT_ARGS]; |
16725b9d | 359 | |
6b805185 SW |
360 | args = kzalloc(sizeof(*args), GFP_KERNEL); |
361 | if (!args) | |
362 | return ERR_PTR(-ENOMEM); | |
363 | args->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*args->mon_addr), | |
364 | GFP_KERNEL); | |
365 | if (!args->mon_addr) | |
366 | goto out; | |
16725b9d | 367 | |
6b805185 | 368 | dout("parse_mount_args %p, dev_name '%s'\n", args, dev_name); |
7b813c46 | 369 | |
16725b9d SW |
370 | /* start with defaults */ |
371 | args->sb_flags = flags; | |
372 | args->flags = CEPH_OPT_DEFAULT; | |
422d2cb8 YS |
373 | args->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT; |
374 | args->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT; | |
16725b9d | 375 | args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */ |
f5a2041b | 376 | args->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */ |
16725b9d SW |
377 | args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
378 | args->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
8fa97655 | 379 | args->rsize = CEPH_MOUNT_RSIZE_DEFAULT; |
16725b9d SW |
380 | args->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
381 | args->cap_release_safety = CEPH_CAPS_PER_RELEASE * 4; | |
382 | args->max_readdir = 1024; | |
2baba250 | 383 | args->congestion_kb = default_congestion_kb(); |
16725b9d SW |
384 | |
385 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ | |
7b813c46 | 386 | err = -EINVAL; |
16725b9d | 387 | if (!dev_name) |
7b813c46 | 388 | goto out; |
16725b9d SW |
389 | *path = strstr(dev_name, ":/"); |
390 | if (*path == NULL) { | |
391 | pr_err("device name is missing path (no :/ in %s)\n", | |
392 | dev_name); | |
7b813c46 | 393 | goto out; |
16725b9d SW |
394 | } |
395 | ||
396 | /* get mon ip(s) */ | |
6b805185 SW |
397 | err = ceph_parse_ips(dev_name, *path, args->mon_addr, |
398 | CEPH_MAX_MON, &args->num_mon); | |
16725b9d | 399 | if (err < 0) |
7b813c46 | 400 | goto out; |
16725b9d | 401 | |
16725b9d SW |
402 | /* path on server */ |
403 | *path += 2; | |
404 | dout("server path '%s'\n", *path); | |
405 | ||
406 | /* parse mount options */ | |
407 | while ((c = strsep(&options, ",")) != NULL) { | |
408 | int token, intval, ret; | |
409 | if (!*c) | |
410 | continue; | |
7b813c46 | 411 | err = -EINVAL; |
16725b9d SW |
412 | token = match_token((char *)c, arg_tokens, argstr); |
413 | if (token < 0) { | |
414 | pr_err("bad mount option at '%s'\n", c); | |
7b813c46 | 415 | goto out; |
16725b9d | 416 | } |
e53c2fe0 | 417 | if (token < Opt_last_int) { |
16725b9d SW |
418 | ret = match_int(&argstr[0], &intval); |
419 | if (ret < 0) { | |
420 | pr_err("bad mount option arg (not int) " | |
421 | "at '%s'\n", c); | |
422 | continue; | |
423 | } | |
e53c2fe0 SW |
424 | dout("got int token %d val %d\n", token, intval); |
425 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
426 | dout("got string token %d val %s\n", token, | |
427 | argstr[0].from); | |
428 | } else { | |
429 | dout("got token %d\n", token); | |
16725b9d SW |
430 | } |
431 | switch (token) { | |
432 | case Opt_fsidmajor: | |
433 | *(__le64 *)&args->fsid.fsid[0] = cpu_to_le64(intval); | |
434 | break; | |
435 | case Opt_fsidminor: | |
436 | *(__le64 *)&args->fsid.fsid[8] = cpu_to_le64(intval); | |
437 | break; | |
438 | case Opt_ip: | |
439 | err = ceph_parse_ips(argstr[0].from, | |
440 | argstr[0].to, | |
441 | &args->my_addr, | |
442 | 1, NULL); | |
443 | if (err < 0) | |
6b805185 | 444 | goto out; |
16725b9d SW |
445 | args->flags |= CEPH_OPT_MYIP; |
446 | break; | |
447 | ||
448 | case Opt_snapdirname: | |
449 | kfree(args->snapdir_name); | |
450 | args->snapdir_name = kstrndup(argstr[0].from, | |
451 | argstr[0].to-argstr[0].from, | |
452 | GFP_KERNEL); | |
453 | break; | |
4e7a5dcd SW |
454 | case Opt_name: |
455 | args->name = kstrndup(argstr[0].from, | |
456 | argstr[0].to-argstr[0].from, | |
457 | GFP_KERNEL); | |
458 | break; | |
16725b9d SW |
459 | case Opt_secret: |
460 | args->secret = kstrndup(argstr[0].from, | |
461 | argstr[0].to-argstr[0].from, | |
462 | GFP_KERNEL); | |
463 | break; | |
464 | ||
465 | /* misc */ | |
466 | case Opt_wsize: | |
467 | args->wsize = intval; | |
468 | break; | |
469 | case Opt_rsize: | |
470 | args->rsize = intval; | |
471 | break; | |
472 | case Opt_osdtimeout: | |
473 | args->osd_timeout = intval; | |
474 | break; | |
422d2cb8 YS |
475 | case Opt_osdkeepalivetimeout: |
476 | args->osd_keepalive_timeout = intval; | |
477 | break; | |
16725b9d SW |
478 | case Opt_mount_timeout: |
479 | args->mount_timeout = intval; | |
480 | break; | |
481 | case Opt_caps_wanted_delay_min: | |
482 | args->caps_wanted_delay_min = intval; | |
483 | break; | |
484 | case Opt_caps_wanted_delay_max: | |
485 | args->caps_wanted_delay_max = intval; | |
486 | break; | |
487 | case Opt_readdir_max_entries: | |
488 | args->max_readdir = intval; | |
489 | break; | |
2baba250 YS |
490 | case Opt_congestion_kb: |
491 | args->congestion_kb = intval; | |
492 | break; | |
16725b9d SW |
493 | |
494 | case Opt_noshare: | |
495 | args->flags |= CEPH_OPT_NOSHARE; | |
496 | break; | |
497 | ||
498 | case Opt_dirstat: | |
499 | args->flags |= CEPH_OPT_DIRSTAT; | |
500 | break; | |
501 | case Opt_nodirstat: | |
502 | args->flags &= ~CEPH_OPT_DIRSTAT; | |
503 | break; | |
504 | case Opt_rbytes: | |
505 | args->flags |= CEPH_OPT_RBYTES; | |
506 | break; | |
507 | case Opt_norbytes: | |
508 | args->flags &= ~CEPH_OPT_RBYTES; | |
509 | break; | |
510 | case Opt_nocrc: | |
511 | args->flags |= CEPH_OPT_NOCRC; | |
512 | break; | |
513 | case Opt_noasyncreaddir: | |
514 | args->flags |= CEPH_OPT_NOASYNCREADDIR; | |
515 | break; | |
516 | ||
517 | default: | |
518 | BUG_ON(token); | |
519 | } | |
520 | } | |
6b805185 | 521 | return args; |
16725b9d | 522 | |
7b813c46 | 523 | out: |
6b805185 SW |
524 | kfree(args->mon_addr); |
525 | kfree(args); | |
526 | return ERR_PTR(err); | |
16725b9d SW |
527 | } |
528 | ||
6b805185 | 529 | static void destroy_mount_args(struct ceph_mount_args *args) |
16725b9d | 530 | { |
6b805185 | 531 | dout("destroy_mount_args %p\n", args); |
16725b9d SW |
532 | kfree(args->snapdir_name); |
533 | args->snapdir_name = NULL; | |
4e7a5dcd SW |
534 | kfree(args->name); |
535 | args->name = NULL; | |
16725b9d SW |
536 | kfree(args->secret); |
537 | args->secret = NULL; | |
6b805185 | 538 | kfree(args); |
16725b9d SW |
539 | } |
540 | ||
541 | /* | |
542 | * create a fresh client instance | |
543 | */ | |
6b805185 | 544 | static struct ceph_client *ceph_create_client(struct ceph_mount_args *args) |
16725b9d SW |
545 | { |
546 | struct ceph_client *client; | |
547 | int err = -ENOMEM; | |
548 | ||
549 | client = kzalloc(sizeof(*client), GFP_KERNEL); | |
550 | if (client == NULL) | |
551 | return ERR_PTR(-ENOMEM); | |
552 | ||
553 | mutex_init(&client->mount_mutex); | |
554 | ||
9bd2e6f8 | 555 | init_waitqueue_head(&client->auth_wq); |
16725b9d SW |
556 | |
557 | client->sb = NULL; | |
558 | client->mount_state = CEPH_MOUNT_MOUNTING; | |
6b805185 | 559 | client->mount_args = args; |
16725b9d SW |
560 | |
561 | client->msgr = NULL; | |
562 | ||
9bd2e6f8 | 563 | client->auth_err = 0; |
2baba250 | 564 | atomic_long_set(&client->writeback_count, 0); |
16725b9d | 565 | |
859e7b14 SW |
566 | err = bdi_init(&client->backing_dev_info); |
567 | if (err < 0) | |
568 | goto fail; | |
569 | ||
16725b9d SW |
570 | err = -ENOMEM; |
571 | client->wb_wq = create_workqueue("ceph-writeback"); | |
572 | if (client->wb_wq == NULL) | |
859e7b14 | 573 | goto fail_bdi; |
16725b9d SW |
574 | client->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid"); |
575 | if (client->pg_inv_wq == NULL) | |
576 | goto fail_wb_wq; | |
577 | client->trunc_wq = create_singlethread_workqueue("ceph-trunc"); | |
578 | if (client->trunc_wq == NULL) | |
579 | goto fail_pg_inv_wq; | |
580 | ||
b9bfb93c SW |
581 | /* set up mempools */ |
582 | err = -ENOMEM; | |
583 | client->wb_pagevec_pool = mempool_create_kmalloc_pool(10, | |
584 | client->mount_args->wsize >> PAGE_CACHE_SHIFT); | |
585 | if (!client->wb_pagevec_pool) | |
586 | goto fail_trunc_wq; | |
587 | ||
85ccce43 SW |
588 | /* caps */ |
589 | client->min_caps = args->max_readdir; | |
590 | ceph_adjust_min_caps(client->min_caps); | |
b9bfb93c | 591 | |
16725b9d SW |
592 | /* subsystems */ |
593 | err = ceph_monc_init(&client->monc, client); | |
594 | if (err < 0) | |
b9bfb93c | 595 | goto fail_mempool; |
16725b9d SW |
596 | err = ceph_osdc_init(&client->osdc, client); |
597 | if (err < 0) | |
598 | goto fail_monc; | |
5f44f142 SW |
599 | err = ceph_mdsc_init(&client->mdsc, client); |
600 | if (err < 0) | |
601 | goto fail_osdc; | |
16725b9d SW |
602 | return client; |
603 | ||
5f44f142 SW |
604 | fail_osdc: |
605 | ceph_osdc_stop(&client->osdc); | |
16725b9d SW |
606 | fail_monc: |
607 | ceph_monc_stop(&client->monc); | |
b9bfb93c SW |
608 | fail_mempool: |
609 | mempool_destroy(client->wb_pagevec_pool); | |
16725b9d SW |
610 | fail_trunc_wq: |
611 | destroy_workqueue(client->trunc_wq); | |
612 | fail_pg_inv_wq: | |
613 | destroy_workqueue(client->pg_inv_wq); | |
614 | fail_wb_wq: | |
615 | destroy_workqueue(client->wb_wq); | |
859e7b14 SW |
616 | fail_bdi: |
617 | bdi_destroy(&client->backing_dev_info); | |
16725b9d SW |
618 | fail: |
619 | kfree(client); | |
620 | return ERR_PTR(err); | |
621 | } | |
622 | ||
623 | static void ceph_destroy_client(struct ceph_client *client) | |
624 | { | |
625 | dout("destroy_client %p\n", client); | |
626 | ||
627 | /* unmount */ | |
628 | ceph_mdsc_stop(&client->mdsc); | |
629 | ceph_monc_stop(&client->monc); | |
630 | ceph_osdc_stop(&client->osdc); | |
631 | ||
85ccce43 SW |
632 | ceph_adjust_min_caps(-client->min_caps); |
633 | ||
16725b9d SW |
634 | ceph_debugfs_client_cleanup(client); |
635 | destroy_workqueue(client->wb_wq); | |
636 | destroy_workqueue(client->pg_inv_wq); | |
637 | destroy_workqueue(client->trunc_wq); | |
638 | ||
639 | if (client->msgr) | |
640 | ceph_messenger_destroy(client->msgr); | |
b9bfb93c | 641 | mempool_destroy(client->wb_pagevec_pool); |
16725b9d | 642 | |
6b805185 | 643 | destroy_mount_args(client->mount_args); |
16725b9d SW |
644 | |
645 | kfree(client); | |
646 | dout("destroy_client %p done\n", client); | |
647 | } | |
648 | ||
0743304d SW |
649 | /* |
650 | * Initially learn our fsid, or verify an fsid matches. | |
651 | */ | |
652 | int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid) | |
653 | { | |
654 | if (client->have_fsid) { | |
655 | if (ceph_fsid_compare(&client->fsid, fsid)) { | |
9ec7cab1 SW |
656 | pr_err("bad fsid, had " FSID_FORMAT " got " FSID_FORMAT, |
657 | PR_FSID(&client->fsid), PR_FSID(fsid)); | |
0743304d SW |
658 | return -1; |
659 | } | |
660 | } else { | |
661 | pr_info("client%lld fsid " FSID_FORMAT "\n", | |
662 | client->monc.auth->global_id, PR_FSID(fsid)); | |
663 | memcpy(&client->fsid, fsid, sizeof(*fsid)); | |
664 | ceph_debugfs_client_init(client); | |
665 | client->have_fsid = true; | |
666 | } | |
667 | return 0; | |
668 | } | |
669 | ||
16725b9d SW |
670 | /* |
671 | * true if we have the mon map (and have thus joined the cluster) | |
672 | */ | |
673 | static int have_mon_map(struct ceph_client *client) | |
674 | { | |
675 | return client->monc.monmap && client->monc.monmap->epoch; | |
676 | } | |
677 | ||
678 | /* | |
679 | * Bootstrap mount by opening the root directory. Note the mount | |
680 | * @started time from caller, and time out if this takes too long. | |
681 | */ | |
682 | static struct dentry *open_root_dentry(struct ceph_client *client, | |
683 | const char *path, | |
684 | unsigned long started) | |
685 | { | |
686 | struct ceph_mds_client *mdsc = &client->mdsc; | |
687 | struct ceph_mds_request *req = NULL; | |
688 | int err; | |
689 | struct dentry *root; | |
690 | ||
691 | /* open dir */ | |
692 | dout("open_root_inode opening '%s'\n", path); | |
693 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
694 | if (IS_ERR(req)) | |
695 | return ERR_PTR(PTR_ERR(req)); | |
696 | req->r_path1 = kstrdup(path, GFP_NOFS); | |
697 | req->r_ino1.ino = CEPH_INO_ROOT; | |
698 | req->r_ino1.snap = CEPH_NOSNAP; | |
699 | req->r_started = started; | |
6b805185 | 700 | req->r_timeout = client->mount_args->mount_timeout * HZ; |
16725b9d SW |
701 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
702 | req->r_num_caps = 2; | |
703 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
704 | if (err == 0) { | |
705 | dout("open_root_inode success\n"); | |
706 | if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && | |
707 | client->sb->s_root == NULL) | |
708 | root = d_alloc_root(req->r_target_inode); | |
709 | else | |
710 | root = d_obtain_alias(req->r_target_inode); | |
711 | req->r_target_inode = NULL; | |
712 | dout("open_root_inode success, root dentry is %p\n", root); | |
713 | } else { | |
714 | root = ERR_PTR(err); | |
715 | } | |
716 | ceph_mdsc_put_request(req); | |
717 | return root; | |
718 | } | |
719 | ||
720 | /* | |
721 | * mount: join the ceph cluster, and open root directory. | |
722 | */ | |
723 | static int ceph_mount(struct ceph_client *client, struct vfsmount *mnt, | |
724 | const char *path) | |
725 | { | |
726 | struct ceph_entity_addr *myaddr = NULL; | |
727 | int err; | |
6b805185 | 728 | unsigned long timeout = client->mount_args->mount_timeout * HZ; |
16725b9d SW |
729 | unsigned long started = jiffies; /* note the start time */ |
730 | struct dentry *root; | |
731 | ||
732 | dout("mount start\n"); | |
733 | mutex_lock(&client->mount_mutex); | |
734 | ||
735 | /* initialize the messenger */ | |
736 | if (client->msgr == NULL) { | |
737 | if (ceph_test_opt(client, MYIP)) | |
6b805185 | 738 | myaddr = &client->mount_args->my_addr; |
16725b9d SW |
739 | client->msgr = ceph_messenger_create(myaddr); |
740 | if (IS_ERR(client->msgr)) { | |
741 | err = PTR_ERR(client->msgr); | |
742 | client->msgr = NULL; | |
743 | goto out; | |
744 | } | |
745 | client->msgr->nocrc = ceph_test_opt(client, NOCRC); | |
746 | } | |
747 | ||
4e7a5dcd SW |
748 | /* open session, and wait for mon, mds, and osd maps */ |
749 | err = ceph_monc_open_session(&client->monc); | |
16725b9d SW |
750 | if (err < 0) |
751 | goto out; | |
752 | ||
4e7a5dcd | 753 | while (!have_mon_map(client)) { |
16725b9d SW |
754 | err = -EIO; |
755 | if (timeout && time_after_eq(jiffies, started + timeout)) | |
756 | goto out; | |
757 | ||
758 | /* wait */ | |
4e7a5dcd | 759 | dout("mount waiting for mon_map\n"); |
9bd2e6f8 SW |
760 | err = wait_event_interruptible_timeout(client->auth_wq, |
761 | have_mon_map(client) || (client->auth_err < 0), | |
16725b9d SW |
762 | timeout); |
763 | if (err == -EINTR || err == -ERESTARTSYS) | |
764 | goto out; | |
9bd2e6f8 SW |
765 | if (client->auth_err < 0) { |
766 | err = client->auth_err; | |
dc14657c YS |
767 | goto out; |
768 | } | |
16725b9d SW |
769 | } |
770 | ||
771 | dout("mount opening root\n"); | |
772 | root = open_root_dentry(client, "", started); | |
773 | if (IS_ERR(root)) { | |
774 | err = PTR_ERR(root); | |
775 | goto out; | |
776 | } | |
777 | if (client->sb->s_root) | |
778 | dput(root); | |
779 | else | |
780 | client->sb->s_root = root; | |
781 | ||
782 | if (path[0] == 0) { | |
783 | dget(root); | |
784 | } else { | |
785 | dout("mount opening base mountpoint\n"); | |
786 | root = open_root_dentry(client, path, started); | |
787 | if (IS_ERR(root)) { | |
788 | err = PTR_ERR(root); | |
789 | dput(client->sb->s_root); | |
790 | client->sb->s_root = NULL; | |
791 | goto out; | |
792 | } | |
793 | } | |
794 | ||
795 | mnt->mnt_root = root; | |
796 | mnt->mnt_sb = client->sb; | |
797 | ||
798 | client->mount_state = CEPH_MOUNT_MOUNTED; | |
799 | dout("mount success\n"); | |
800 | err = 0; | |
801 | ||
802 | out: | |
803 | mutex_unlock(&client->mount_mutex); | |
804 | return err; | |
805 | } | |
806 | ||
807 | static int ceph_set_super(struct super_block *s, void *data) | |
808 | { | |
809 | struct ceph_client *client = data; | |
810 | int ret; | |
811 | ||
812 | dout("set_super %p data %p\n", s, data); | |
813 | ||
6b805185 | 814 | s->s_flags = client->mount_args->sb_flags; |
16725b9d SW |
815 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
816 | ||
817 | s->s_fs_info = client; | |
818 | client->sb = s; | |
819 | ||
820 | s->s_op = &ceph_super_ops; | |
821 | s->s_export_op = &ceph_export_ops; | |
822 | ||
823 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
824 | ||
825 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
826 | if (ret != 0) | |
827 | goto fail; | |
828 | ||
829 | return ret; | |
830 | ||
831 | fail: | |
832 | s->s_fs_info = NULL; | |
833 | client->sb = NULL; | |
834 | return ret; | |
835 | } | |
836 | ||
837 | /* | |
838 | * share superblock if same fs AND options | |
839 | */ | |
840 | static int ceph_compare_super(struct super_block *sb, void *data) | |
841 | { | |
842 | struct ceph_client *new = data; | |
6b805185 | 843 | struct ceph_mount_args *args = new->mount_args; |
16725b9d SW |
844 | struct ceph_client *other = ceph_sb_to_client(sb); |
845 | int i; | |
846 | ||
847 | dout("ceph_compare_super %p\n", sb); | |
848 | if (args->flags & CEPH_OPT_FSID) { | |
849 | if (ceph_fsid_compare(&args->fsid, &other->fsid)) { | |
850 | dout("fsid doesn't match\n"); | |
851 | return 0; | |
852 | } | |
853 | } else { | |
854 | /* do we share (a) monitor? */ | |
855 | for (i = 0; i < new->monc.monmap->num_mon; i++) | |
856 | if (ceph_monmap_contains(other->monc.monmap, | |
857 | &new->monc.monmap->mon_inst[i].addr)) | |
858 | break; | |
859 | if (i == new->monc.monmap->num_mon) { | |
860 | dout("mon ip not part of monmap\n"); | |
861 | return 0; | |
862 | } | |
863 | dout("mon ip matches existing sb %p\n", sb); | |
864 | } | |
6b805185 | 865 | if (args->sb_flags != other->mount_args->sb_flags) { |
16725b9d SW |
866 | dout("flags differ\n"); |
867 | return 0; | |
868 | } | |
869 | return 1; | |
870 | } | |
871 | ||
872 | /* | |
873 | * construct our own bdi so we can control readahead, etc. | |
874 | */ | |
859e7b14 | 875 | static int ceph_register_bdi(struct super_block *sb, struct ceph_client *client) |
16725b9d SW |
876 | { |
877 | int err; | |
878 | ||
f2cf418c | 879 | sb->s_bdi = &client->backing_dev_info; |
16725b9d SW |
880 | |
881 | /* set ra_pages based on rsize mount option? */ | |
6b805185 | 882 | if (client->mount_args->rsize >= PAGE_CACHE_SIZE) |
16725b9d | 883 | client->backing_dev_info.ra_pages = |
6b805185 | 884 | (client->mount_args->rsize + PAGE_CACHE_SIZE - 1) |
16725b9d | 885 | >> PAGE_SHIFT; |
16725b9d SW |
886 | err = bdi_register_dev(&client->backing_dev_info, sb->s_dev); |
887 | return err; | |
888 | } | |
889 | ||
890 | static int ceph_get_sb(struct file_system_type *fs_type, | |
891 | int flags, const char *dev_name, void *data, | |
892 | struct vfsmount *mnt) | |
893 | { | |
894 | struct super_block *sb; | |
895 | struct ceph_client *client; | |
896 | int err; | |
897 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 898 | const char *path = NULL; |
6b805185 | 899 | struct ceph_mount_args *args; |
16725b9d SW |
900 | |
901 | dout("ceph_get_sb\n"); | |
6b805185 SW |
902 | args = parse_mount_args(flags, data, dev_name, &path); |
903 | if (IS_ERR(args)) { | |
904 | err = PTR_ERR(args); | |
905 | goto out_final; | |
906 | } | |
16725b9d SW |
907 | |
908 | /* create client (which we may/may not use) */ | |
6b805185 SW |
909 | client = ceph_create_client(args); |
910 | if (IS_ERR(client)) { | |
911 | err = PTR_ERR(client); | |
912 | goto out_final; | |
913 | } | |
16725b9d | 914 | |
6b805185 | 915 | if (client->mount_args->flags & CEPH_OPT_NOSHARE) |
16725b9d SW |
916 | compare_super = NULL; |
917 | sb = sget(fs_type, compare_super, ceph_set_super, client); | |
918 | if (IS_ERR(sb)) { | |
919 | err = PTR_ERR(sb); | |
920 | goto out; | |
921 | } | |
922 | ||
923 | if (ceph_client(sb) != client) { | |
924 | ceph_destroy_client(client); | |
925 | client = ceph_client(sb); | |
926 | dout("get_sb got existing client %p\n", client); | |
927 | } else { | |
928 | dout("get_sb using new client %p\n", client); | |
859e7b14 | 929 | err = ceph_register_bdi(sb, client); |
16725b9d SW |
930 | if (err < 0) |
931 | goto out_splat; | |
932 | } | |
933 | ||
934 | err = ceph_mount(client, mnt, path); | |
935 | if (err < 0) | |
936 | goto out_splat; | |
937 | dout("root %p inode %p ino %llx.%llx\n", mnt->mnt_root, | |
938 | mnt->mnt_root->d_inode, ceph_vinop(mnt->mnt_root->d_inode)); | |
939 | return 0; | |
940 | ||
941 | out_splat: | |
942 | ceph_mdsc_close_sessions(&client->mdsc); | |
943 | up_write(&sb->s_umount); | |
944 | deactivate_super(sb); | |
945 | goto out_final; | |
946 | ||
947 | out: | |
948 | ceph_destroy_client(client); | |
949 | out_final: | |
950 | dout("ceph_get_sb fail %d\n", err); | |
951 | return err; | |
952 | } | |
953 | ||
954 | static void ceph_kill_sb(struct super_block *s) | |
955 | { | |
956 | struct ceph_client *client = ceph_sb_to_client(s); | |
957 | dout("kill_sb %p\n", s); | |
958 | ceph_mdsc_pre_umount(&client->mdsc); | |
16725b9d | 959 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
e0e32710 SW |
960 | if (s->s_bdi == &client->backing_dev_info) |
961 | bdi_unregister(&client->backing_dev_info); | |
16725b9d SW |
962 | bdi_destroy(&client->backing_dev_info); |
963 | ceph_destroy_client(client); | |
964 | } | |
965 | ||
966 | static struct file_system_type ceph_fs_type = { | |
967 | .owner = THIS_MODULE, | |
968 | .name = "ceph", | |
969 | .get_sb = ceph_get_sb, | |
970 | .kill_sb = ceph_kill_sb, | |
971 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
972 | }; | |
973 | ||
974 | #define _STRINGIFY(x) #x | |
975 | #define STRINGIFY(x) _STRINGIFY(x) | |
976 | ||
977 | static int __init init_ceph(void) | |
978 | { | |
979 | int ret = 0; | |
980 | ||
981 | ret = ceph_debugfs_init(); | |
982 | if (ret < 0) | |
983 | goto out; | |
984 | ||
985 | ret = ceph_msgr_init(); | |
986 | if (ret < 0) | |
987 | goto out_debugfs; | |
988 | ||
989 | ret = init_caches(); | |
990 | if (ret) | |
991 | goto out_msgr; | |
992 | ||
993 | ceph_caps_init(); | |
994 | ||
995 | ret = register_filesystem(&ceph_fs_type); | |
996 | if (ret) | |
997 | goto out_icache; | |
998 | ||
c8f16584 SW |
999 | pr_info("loaded (mon/mds/osd proto %d/%d/%d, osdmap %d/%d %d/%d)\n", |
1000 | CEPH_MONC_PROTOCOL, CEPH_MDSC_PROTOCOL, CEPH_OSDC_PROTOCOL, | |
1001 | CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT, | |
1002 | CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT); | |
16725b9d SW |
1003 | return 0; |
1004 | ||
1005 | out_icache: | |
1006 | destroy_caches(); | |
1007 | out_msgr: | |
1008 | ceph_msgr_exit(); | |
1009 | out_debugfs: | |
1010 | ceph_debugfs_cleanup(); | |
1011 | out: | |
1012 | return ret; | |
1013 | } | |
1014 | ||
1015 | static void __exit exit_ceph(void) | |
1016 | { | |
1017 | dout("exit_ceph\n"); | |
1018 | unregister_filesystem(&ceph_fs_type); | |
1019 | ceph_caps_finalize(); | |
1020 | destroy_caches(); | |
1021 | ceph_msgr_exit(); | |
1022 | ceph_debugfs_cleanup(); | |
1023 | } | |
1024 | ||
1025 | module_init(init_ceph); | |
1026 | module_exit(exit_ceph); | |
1027 | ||
1028 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1029 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1030 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1031 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1032 | MODULE_LICENSE("GPL"); |