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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> | |
14 | #include <linux/statfs.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/version.h> | |
17 | #include <linux/vmalloc.h> | |
18 | ||
16725b9d SW |
19 | #include "decode.h" |
20 | #include "super.h" | |
21 | #include "mon_client.h" | |
0743304d | 22 | #include "auth.h" |
16725b9d SW |
23 | |
24 | /* | |
25 | * Ceph superblock operations | |
26 | * | |
27 | * Handle the basics of mounting, unmounting. | |
28 | */ | |
29 | ||
30 | ||
31 | /* | |
32 | * find filename portion of a path (/foo/bar/baz -> baz) | |
33 | */ | |
34 | const char *ceph_file_part(const char *s, int len) | |
35 | { | |
36 | const char *e = s + len; | |
37 | ||
38 | while (e != s && *(e-1) != '/') | |
39 | e--; | |
40 | return e; | |
41 | } | |
42 | ||
43 | ||
44 | /* | |
45 | * super ops | |
46 | */ | |
47 | static void ceph_put_super(struct super_block *s) | |
48 | { | |
49 | struct ceph_client *cl = ceph_client(s); | |
50 | ||
51 | dout("put_super\n"); | |
52 | ceph_mdsc_close_sessions(&cl->mdsc); | |
53 | return; | |
54 | } | |
55 | ||
56 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
57 | { | |
58 | struct ceph_client *client = ceph_inode_to_client(dentry->d_inode); | |
59 | struct ceph_monmap *monmap = client->monc.monmap; | |
60 | struct ceph_statfs st; | |
61 | u64 fsid; | |
62 | int err; | |
63 | ||
64 | dout("statfs\n"); | |
65 | err = ceph_monc_do_statfs(&client->monc, &st); | |
66 | if (err < 0) | |
67 | return err; | |
68 | ||
69 | /* fill in kstatfs */ | |
70 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
71 | ||
72 | /* | |
73 | * express utilization in terms of large blocks to avoid | |
74 | * overflow on 32-bit machines. | |
75 | */ | |
76 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
77 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
78 | buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >> | |
79 | (CEPH_BLOCK_SHIFT-10); | |
80 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
81 | ||
82 | buf->f_files = le64_to_cpu(st.num_objects); | |
83 | buf->f_ffree = -1; | |
84 | buf->f_namelen = PATH_MAX; | |
85 | buf->f_frsize = PAGE_CACHE_SIZE; | |
86 | ||
87 | /* leave fsid little-endian, regardless of host endianness */ | |
88 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
89 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
90 | buf->f_fsid.val[1] = fsid >> 32; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | ||
96 | static int ceph_syncfs(struct super_block *sb, int wait) | |
97 | { | |
98 | dout("sync_fs %d\n", wait); | |
99 | ceph_osdc_sync(&ceph_client(sb)->osdc); | |
100 | ceph_mdsc_sync(&ceph_client(sb)->mdsc); | |
f2cf418c | 101 | dout("sync_fs %d done\n", wait); |
16725b9d SW |
102 | return 0; |
103 | } | |
104 | ||
105 | ||
106 | /** | |
107 | * ceph_show_options - Show mount options in /proc/mounts | |
108 | * @m: seq_file to write to | |
109 | * @mnt: mount descriptor | |
110 | */ | |
111 | static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt) | |
112 | { | |
113 | struct ceph_client *client = ceph_sb_to_client(mnt->mnt_sb); | |
6b805185 | 114 | struct ceph_mount_args *args = client->mount_args; |
16725b9d SW |
115 | |
116 | if (args->flags & CEPH_OPT_FSID) | |
117 | seq_printf(m, ",fsidmajor=%llu,fsidminor%llu", | |
118 | le64_to_cpu(*(__le64 *)&args->fsid.fsid[0]), | |
119 | le64_to_cpu(*(__le64 *)&args->fsid.fsid[8])); | |
120 | if (args->flags & CEPH_OPT_NOSHARE) | |
121 | seq_puts(m, ",noshare"); | |
122 | if (args->flags & CEPH_OPT_DIRSTAT) | |
123 | seq_puts(m, ",dirstat"); | |
124 | if ((args->flags & CEPH_OPT_RBYTES) == 0) | |
125 | seq_puts(m, ",norbytes"); | |
126 | if (args->flags & CEPH_OPT_NOCRC) | |
127 | seq_puts(m, ",nocrc"); | |
128 | if (args->flags & CEPH_OPT_NOASYNCREADDIR) | |
129 | seq_puts(m, ",noasyncreaddir"); | |
130 | if (strcmp(args->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) | |
131 | seq_printf(m, ",snapdirname=%s", args->snapdir_name); | |
4e7a5dcd SW |
132 | if (args->name) |
133 | seq_printf(m, ",name=%s", args->name); | |
16725b9d SW |
134 | if (args->secret) |
135 | seq_puts(m, ",secret=<hidden>"); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | /* | |
140 | * caches | |
141 | */ | |
142 | struct kmem_cache *ceph_inode_cachep; | |
143 | struct kmem_cache *ceph_cap_cachep; | |
144 | struct kmem_cache *ceph_dentry_cachep; | |
145 | struct kmem_cache *ceph_file_cachep; | |
146 | ||
147 | static void ceph_inode_init_once(void *foo) | |
148 | { | |
149 | struct ceph_inode_info *ci = foo; | |
150 | inode_init_once(&ci->vfs_inode); | |
151 | } | |
152 | ||
2baba250 YS |
153 | static int default_congestion_kb(void) |
154 | { | |
155 | int congestion_kb; | |
156 | ||
157 | /* | |
158 | * Copied from NFS | |
159 | * | |
160 | * congestion size, scale with available memory. | |
161 | * | |
162 | * 64MB: 8192k | |
163 | * 128MB: 11585k | |
164 | * 256MB: 16384k | |
165 | * 512MB: 23170k | |
166 | * 1GB: 32768k | |
167 | * 2GB: 46340k | |
168 | * 4GB: 65536k | |
169 | * 8GB: 92681k | |
170 | * 16GB: 131072k | |
171 | * | |
172 | * This allows larger machines to have larger/more transfers. | |
173 | * Limit the default to 256M | |
174 | */ | |
175 | congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); | |
176 | if (congestion_kb > 256*1024) | |
177 | congestion_kb = 256*1024; | |
178 | ||
179 | return congestion_kb; | |
180 | } | |
181 | ||
16725b9d SW |
182 | static int __init init_caches(void) |
183 | { | |
184 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
185 | sizeof(struct ceph_inode_info), | |
186 | __alignof__(struct ceph_inode_info), | |
187 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
188 | ceph_inode_init_once); | |
189 | if (ceph_inode_cachep == NULL) | |
190 | return -ENOMEM; | |
191 | ||
192 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
193 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
194 | if (ceph_cap_cachep == NULL) | |
195 | goto bad_cap; | |
196 | ||
197 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
198 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
199 | if (ceph_dentry_cachep == NULL) | |
200 | goto bad_dentry; | |
201 | ||
202 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
203 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
204 | if (ceph_file_cachep == NULL) | |
205 | goto bad_file; | |
206 | ||
207 | return 0; | |
208 | ||
209 | bad_file: | |
210 | kmem_cache_destroy(ceph_dentry_cachep); | |
211 | bad_dentry: | |
212 | kmem_cache_destroy(ceph_cap_cachep); | |
213 | bad_cap: | |
214 | kmem_cache_destroy(ceph_inode_cachep); | |
215 | return -ENOMEM; | |
216 | } | |
217 | ||
218 | static void destroy_caches(void) | |
219 | { | |
220 | kmem_cache_destroy(ceph_inode_cachep); | |
221 | kmem_cache_destroy(ceph_cap_cachep); | |
222 | kmem_cache_destroy(ceph_dentry_cachep); | |
223 | kmem_cache_destroy(ceph_file_cachep); | |
224 | } | |
225 | ||
226 | ||
227 | /* | |
228 | * ceph_umount_begin - initiate forced umount. Tear down down the | |
229 | * mount, skipping steps that may hang while waiting for server(s). | |
230 | */ | |
231 | static void ceph_umount_begin(struct super_block *sb) | |
232 | { | |
233 | struct ceph_client *client = ceph_sb_to_client(sb); | |
234 | ||
235 | dout("ceph_umount_begin - starting forced umount\n"); | |
236 | if (!client) | |
237 | return; | |
238 | client->mount_state = CEPH_MOUNT_SHUTDOWN; | |
239 | return; | |
240 | } | |
241 | ||
242 | static const struct super_operations ceph_super_ops = { | |
243 | .alloc_inode = ceph_alloc_inode, | |
244 | .destroy_inode = ceph_destroy_inode, | |
245 | .write_inode = ceph_write_inode, | |
246 | .sync_fs = ceph_syncfs, | |
247 | .put_super = ceph_put_super, | |
248 | .show_options = ceph_show_options, | |
249 | .statfs = ceph_statfs, | |
250 | .umount_begin = ceph_umount_begin, | |
251 | }; | |
252 | ||
253 | ||
254 | const char *ceph_msg_type_name(int type) | |
255 | { | |
256 | switch (type) { | |
257 | case CEPH_MSG_SHUTDOWN: return "shutdown"; | |
258 | case CEPH_MSG_PING: return "ping"; | |
4e7a5dcd SW |
259 | case CEPH_MSG_AUTH: return "auth"; |
260 | case CEPH_MSG_AUTH_REPLY: return "auth_reply"; | |
16725b9d SW |
261 | case CEPH_MSG_MON_MAP: return "mon_map"; |
262 | case CEPH_MSG_MON_GET_MAP: return "mon_get_map"; | |
263 | case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe"; | |
264 | case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack"; | |
16725b9d SW |
265 | case CEPH_MSG_STATFS: return "statfs"; |
266 | case CEPH_MSG_STATFS_REPLY: return "statfs_reply"; | |
16725b9d SW |
267 | case CEPH_MSG_MDS_MAP: return "mds_map"; |
268 | case CEPH_MSG_CLIENT_SESSION: return "client_session"; | |
269 | case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect"; | |
270 | case CEPH_MSG_CLIENT_REQUEST: return "client_request"; | |
271 | case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward"; | |
272 | case CEPH_MSG_CLIENT_REPLY: return "client_reply"; | |
273 | case CEPH_MSG_CLIENT_CAPS: return "client_caps"; | |
274 | case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; | |
275 | case CEPH_MSG_CLIENT_SNAP: return "client_snap"; | |
276 | case CEPH_MSG_CLIENT_LEASE: return "client_lease"; | |
16725b9d SW |
277 | case CEPH_MSG_OSD_MAP: return "osd_map"; |
278 | case CEPH_MSG_OSD_OP: return "osd_op"; | |
279 | case CEPH_MSG_OSD_OPREPLY: return "osd_opreply"; | |
280 | default: return "unknown"; | |
281 | } | |
282 | } | |
283 | ||
284 | ||
285 | /* | |
286 | * mount options | |
287 | */ | |
288 | enum { | |
289 | Opt_fsidmajor, | |
290 | Opt_fsidminor, | |
291 | Opt_monport, | |
292 | Opt_wsize, | |
293 | Opt_rsize, | |
294 | Opt_osdtimeout, | |
295 | Opt_mount_timeout, | |
f5a2041b | 296 | Opt_osd_idle_ttl, |
16725b9d SW |
297 | Opt_caps_wanted_delay_min, |
298 | Opt_caps_wanted_delay_max, | |
299 | Opt_readdir_max_entries, | |
2baba250 | 300 | Opt_congestion_kb, |
e53c2fe0 | 301 | Opt_last_int, |
16725b9d SW |
302 | /* int args above */ |
303 | Opt_snapdirname, | |
4e7a5dcd | 304 | Opt_name, |
16725b9d | 305 | Opt_secret, |
e53c2fe0 | 306 | Opt_last_string, |
16725b9d SW |
307 | /* string args above */ |
308 | Opt_ip, | |
309 | Opt_noshare, | |
310 | Opt_dirstat, | |
311 | Opt_nodirstat, | |
312 | Opt_rbytes, | |
313 | Opt_norbytes, | |
314 | Opt_nocrc, | |
315 | Opt_noasyncreaddir, | |
316 | }; | |
317 | ||
318 | static match_table_t arg_tokens = { | |
319 | {Opt_fsidmajor, "fsidmajor=%ld"}, | |
320 | {Opt_fsidminor, "fsidminor=%ld"}, | |
321 | {Opt_monport, "monport=%d"}, | |
322 | {Opt_wsize, "wsize=%d"}, | |
323 | {Opt_rsize, "rsize=%d"}, | |
324 | {Opt_osdtimeout, "osdtimeout=%d"}, | |
325 | {Opt_mount_timeout, "mount_timeout=%d"}, | |
f5a2041b | 326 | {Opt_osd_idle_ttl, "osd_idle_ttl=%d"}, |
16725b9d SW |
327 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
328 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
329 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, | |
2baba250 | 330 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d SW |
331 | /* int args above */ |
332 | {Opt_snapdirname, "snapdirname=%s"}, | |
4e7a5dcd | 333 | {Opt_name, "name=%s"}, |
16725b9d SW |
334 | {Opt_secret, "secret=%s"}, |
335 | /* string args above */ | |
336 | {Opt_ip, "ip=%s"}, | |
337 | {Opt_noshare, "noshare"}, | |
338 | {Opt_dirstat, "dirstat"}, | |
339 | {Opt_nodirstat, "nodirstat"}, | |
340 | {Opt_rbytes, "rbytes"}, | |
341 | {Opt_norbytes, "norbytes"}, | |
342 | {Opt_nocrc, "nocrc"}, | |
343 | {Opt_noasyncreaddir, "noasyncreaddir"}, | |
344 | {-1, NULL} | |
345 | }; | |
346 | ||
347 | ||
6b805185 SW |
348 | static struct ceph_mount_args *parse_mount_args(int flags, char *options, |
349 | const char *dev_name, | |
350 | const char **path) | |
16725b9d | 351 | { |
6b805185 | 352 | struct ceph_mount_args *args; |
16725b9d | 353 | const char *c; |
6b805185 | 354 | int err = -ENOMEM; |
16725b9d | 355 | substring_t argstr[MAX_OPT_ARGS]; |
16725b9d | 356 | |
6b805185 SW |
357 | args = kzalloc(sizeof(*args), GFP_KERNEL); |
358 | if (!args) | |
359 | return ERR_PTR(-ENOMEM); | |
360 | args->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*args->mon_addr), | |
361 | GFP_KERNEL); | |
362 | if (!args->mon_addr) | |
363 | goto out; | |
16725b9d | 364 | |
6b805185 | 365 | dout("parse_mount_args %p, dev_name '%s'\n", args, dev_name); |
7b813c46 | 366 | |
16725b9d SW |
367 | /* start with defaults */ |
368 | args->sb_flags = flags; | |
369 | args->flags = CEPH_OPT_DEFAULT; | |
370 | args->osd_timeout = 5; /* seconds */ | |
371 | args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */ | |
f5a2041b | 372 | args->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */ |
16725b9d SW |
373 | args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
374 | args->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
8fa97655 | 375 | args->rsize = CEPH_MOUNT_RSIZE_DEFAULT; |
16725b9d SW |
376 | args->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
377 | args->cap_release_safety = CEPH_CAPS_PER_RELEASE * 4; | |
378 | args->max_readdir = 1024; | |
2baba250 | 379 | args->congestion_kb = default_congestion_kb(); |
16725b9d SW |
380 | |
381 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ | |
7b813c46 | 382 | err = -EINVAL; |
16725b9d | 383 | if (!dev_name) |
7b813c46 | 384 | goto out; |
16725b9d SW |
385 | *path = strstr(dev_name, ":/"); |
386 | if (*path == NULL) { | |
387 | pr_err("device name is missing path (no :/ in %s)\n", | |
388 | dev_name); | |
7b813c46 | 389 | goto out; |
16725b9d SW |
390 | } |
391 | ||
392 | /* get mon ip(s) */ | |
6b805185 SW |
393 | err = ceph_parse_ips(dev_name, *path, args->mon_addr, |
394 | CEPH_MAX_MON, &args->num_mon); | |
16725b9d | 395 | if (err < 0) |
7b813c46 | 396 | goto out; |
16725b9d | 397 | |
16725b9d SW |
398 | /* path on server */ |
399 | *path += 2; | |
400 | dout("server path '%s'\n", *path); | |
401 | ||
402 | /* parse mount options */ | |
403 | while ((c = strsep(&options, ",")) != NULL) { | |
404 | int token, intval, ret; | |
405 | if (!*c) | |
406 | continue; | |
7b813c46 | 407 | err = -EINVAL; |
16725b9d SW |
408 | token = match_token((char *)c, arg_tokens, argstr); |
409 | if (token < 0) { | |
410 | pr_err("bad mount option at '%s'\n", c); | |
7b813c46 | 411 | goto out; |
16725b9d | 412 | } |
e53c2fe0 | 413 | if (token < Opt_last_int) { |
16725b9d SW |
414 | ret = match_int(&argstr[0], &intval); |
415 | if (ret < 0) { | |
416 | pr_err("bad mount option arg (not int) " | |
417 | "at '%s'\n", c); | |
418 | continue; | |
419 | } | |
e53c2fe0 SW |
420 | dout("got int token %d val %d\n", token, intval); |
421 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
422 | dout("got string token %d val %s\n", token, | |
423 | argstr[0].from); | |
424 | } else { | |
425 | dout("got token %d\n", token); | |
16725b9d SW |
426 | } |
427 | switch (token) { | |
428 | case Opt_fsidmajor: | |
429 | *(__le64 *)&args->fsid.fsid[0] = cpu_to_le64(intval); | |
430 | break; | |
431 | case Opt_fsidminor: | |
432 | *(__le64 *)&args->fsid.fsid[8] = cpu_to_le64(intval); | |
433 | break; | |
434 | case Opt_ip: | |
435 | err = ceph_parse_ips(argstr[0].from, | |
436 | argstr[0].to, | |
437 | &args->my_addr, | |
438 | 1, NULL); | |
439 | if (err < 0) | |
6b805185 | 440 | goto out; |
16725b9d SW |
441 | args->flags |= CEPH_OPT_MYIP; |
442 | break; | |
443 | ||
444 | case Opt_snapdirname: | |
445 | kfree(args->snapdir_name); | |
446 | args->snapdir_name = kstrndup(argstr[0].from, | |
447 | argstr[0].to-argstr[0].from, | |
448 | GFP_KERNEL); | |
449 | break; | |
4e7a5dcd SW |
450 | case Opt_name: |
451 | args->name = kstrndup(argstr[0].from, | |
452 | argstr[0].to-argstr[0].from, | |
453 | GFP_KERNEL); | |
454 | break; | |
16725b9d SW |
455 | case Opt_secret: |
456 | args->secret = kstrndup(argstr[0].from, | |
457 | argstr[0].to-argstr[0].from, | |
458 | GFP_KERNEL); | |
459 | break; | |
460 | ||
461 | /* misc */ | |
462 | case Opt_wsize: | |
463 | args->wsize = intval; | |
464 | break; | |
465 | case Opt_rsize: | |
466 | args->rsize = intval; | |
467 | break; | |
468 | case Opt_osdtimeout: | |
469 | args->osd_timeout = intval; | |
470 | break; | |
471 | case Opt_mount_timeout: | |
472 | args->mount_timeout = intval; | |
473 | break; | |
474 | case Opt_caps_wanted_delay_min: | |
475 | args->caps_wanted_delay_min = intval; | |
476 | break; | |
477 | case Opt_caps_wanted_delay_max: | |
478 | args->caps_wanted_delay_max = intval; | |
479 | break; | |
480 | case Opt_readdir_max_entries: | |
481 | args->max_readdir = intval; | |
482 | break; | |
2baba250 YS |
483 | case Opt_congestion_kb: |
484 | args->congestion_kb = intval; | |
485 | break; | |
16725b9d SW |
486 | |
487 | case Opt_noshare: | |
488 | args->flags |= CEPH_OPT_NOSHARE; | |
489 | break; | |
490 | ||
491 | case Opt_dirstat: | |
492 | args->flags |= CEPH_OPT_DIRSTAT; | |
493 | break; | |
494 | case Opt_nodirstat: | |
495 | args->flags &= ~CEPH_OPT_DIRSTAT; | |
496 | break; | |
497 | case Opt_rbytes: | |
498 | args->flags |= CEPH_OPT_RBYTES; | |
499 | break; | |
500 | case Opt_norbytes: | |
501 | args->flags &= ~CEPH_OPT_RBYTES; | |
502 | break; | |
503 | case Opt_nocrc: | |
504 | args->flags |= CEPH_OPT_NOCRC; | |
505 | break; | |
506 | case Opt_noasyncreaddir: | |
507 | args->flags |= CEPH_OPT_NOASYNCREADDIR; | |
508 | break; | |
509 | ||
510 | default: | |
511 | BUG_ON(token); | |
512 | } | |
513 | } | |
6b805185 | 514 | return args; |
16725b9d | 515 | |
7b813c46 | 516 | out: |
6b805185 SW |
517 | kfree(args->mon_addr); |
518 | kfree(args); | |
519 | return ERR_PTR(err); | |
16725b9d SW |
520 | } |
521 | ||
6b805185 | 522 | static void destroy_mount_args(struct ceph_mount_args *args) |
16725b9d | 523 | { |
6b805185 | 524 | dout("destroy_mount_args %p\n", args); |
16725b9d SW |
525 | kfree(args->snapdir_name); |
526 | args->snapdir_name = NULL; | |
4e7a5dcd SW |
527 | kfree(args->name); |
528 | args->name = NULL; | |
16725b9d SW |
529 | kfree(args->secret); |
530 | args->secret = NULL; | |
6b805185 | 531 | kfree(args); |
16725b9d SW |
532 | } |
533 | ||
534 | /* | |
535 | * create a fresh client instance | |
536 | */ | |
6b805185 | 537 | static struct ceph_client *ceph_create_client(struct ceph_mount_args *args) |
16725b9d SW |
538 | { |
539 | struct ceph_client *client; | |
540 | int err = -ENOMEM; | |
541 | ||
542 | client = kzalloc(sizeof(*client), GFP_KERNEL); | |
543 | if (client == NULL) | |
544 | return ERR_PTR(-ENOMEM); | |
545 | ||
546 | mutex_init(&client->mount_mutex); | |
547 | ||
9bd2e6f8 | 548 | init_waitqueue_head(&client->auth_wq); |
16725b9d SW |
549 | |
550 | client->sb = NULL; | |
551 | client->mount_state = CEPH_MOUNT_MOUNTING; | |
6b805185 | 552 | client->mount_args = args; |
16725b9d SW |
553 | |
554 | client->msgr = NULL; | |
555 | ||
9bd2e6f8 | 556 | client->auth_err = 0; |
2baba250 | 557 | atomic_long_set(&client->writeback_count, 0); |
16725b9d | 558 | |
859e7b14 SW |
559 | err = bdi_init(&client->backing_dev_info); |
560 | if (err < 0) | |
561 | goto fail; | |
562 | ||
16725b9d SW |
563 | err = -ENOMEM; |
564 | client->wb_wq = create_workqueue("ceph-writeback"); | |
565 | if (client->wb_wq == NULL) | |
859e7b14 | 566 | goto fail_bdi; |
16725b9d SW |
567 | client->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid"); |
568 | if (client->pg_inv_wq == NULL) | |
569 | goto fail_wb_wq; | |
570 | client->trunc_wq = create_singlethread_workqueue("ceph-trunc"); | |
571 | if (client->trunc_wq == NULL) | |
572 | goto fail_pg_inv_wq; | |
573 | ||
b9bfb93c SW |
574 | /* set up mempools */ |
575 | err = -ENOMEM; | |
576 | client->wb_pagevec_pool = mempool_create_kmalloc_pool(10, | |
577 | client->mount_args->wsize >> PAGE_CACHE_SHIFT); | |
578 | if (!client->wb_pagevec_pool) | |
579 | goto fail_trunc_wq; | |
580 | ||
85ccce43 SW |
581 | /* caps */ |
582 | client->min_caps = args->max_readdir; | |
583 | ceph_adjust_min_caps(client->min_caps); | |
b9bfb93c | 584 | |
16725b9d SW |
585 | /* subsystems */ |
586 | err = ceph_monc_init(&client->monc, client); | |
587 | if (err < 0) | |
b9bfb93c | 588 | goto fail_mempool; |
16725b9d SW |
589 | err = ceph_osdc_init(&client->osdc, client); |
590 | if (err < 0) | |
591 | goto fail_monc; | |
5f44f142 SW |
592 | err = ceph_mdsc_init(&client->mdsc, client); |
593 | if (err < 0) | |
594 | goto fail_osdc; | |
16725b9d SW |
595 | return client; |
596 | ||
5f44f142 SW |
597 | fail_osdc: |
598 | ceph_osdc_stop(&client->osdc); | |
16725b9d SW |
599 | fail_monc: |
600 | ceph_monc_stop(&client->monc); | |
b9bfb93c SW |
601 | fail_mempool: |
602 | mempool_destroy(client->wb_pagevec_pool); | |
16725b9d SW |
603 | fail_trunc_wq: |
604 | destroy_workqueue(client->trunc_wq); | |
605 | fail_pg_inv_wq: | |
606 | destroy_workqueue(client->pg_inv_wq); | |
607 | fail_wb_wq: | |
608 | destroy_workqueue(client->wb_wq); | |
859e7b14 SW |
609 | fail_bdi: |
610 | bdi_destroy(&client->backing_dev_info); | |
16725b9d SW |
611 | fail: |
612 | kfree(client); | |
613 | return ERR_PTR(err); | |
614 | } | |
615 | ||
616 | static void ceph_destroy_client(struct ceph_client *client) | |
617 | { | |
618 | dout("destroy_client %p\n", client); | |
619 | ||
620 | /* unmount */ | |
621 | ceph_mdsc_stop(&client->mdsc); | |
622 | ceph_monc_stop(&client->monc); | |
623 | ceph_osdc_stop(&client->osdc); | |
624 | ||
85ccce43 SW |
625 | ceph_adjust_min_caps(-client->min_caps); |
626 | ||
16725b9d SW |
627 | ceph_debugfs_client_cleanup(client); |
628 | destroy_workqueue(client->wb_wq); | |
629 | destroy_workqueue(client->pg_inv_wq); | |
630 | destroy_workqueue(client->trunc_wq); | |
631 | ||
632 | if (client->msgr) | |
633 | ceph_messenger_destroy(client->msgr); | |
b9bfb93c | 634 | mempool_destroy(client->wb_pagevec_pool); |
16725b9d | 635 | |
6b805185 | 636 | destroy_mount_args(client->mount_args); |
16725b9d SW |
637 | |
638 | kfree(client); | |
639 | dout("destroy_client %p done\n", client); | |
640 | } | |
641 | ||
0743304d SW |
642 | /* |
643 | * Initially learn our fsid, or verify an fsid matches. | |
644 | */ | |
645 | int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid) | |
646 | { | |
647 | if (client->have_fsid) { | |
648 | if (ceph_fsid_compare(&client->fsid, fsid)) { | |
9ec7cab1 SW |
649 | pr_err("bad fsid, had " FSID_FORMAT " got " FSID_FORMAT, |
650 | PR_FSID(&client->fsid), PR_FSID(fsid)); | |
0743304d SW |
651 | return -1; |
652 | } | |
653 | } else { | |
654 | pr_info("client%lld fsid " FSID_FORMAT "\n", | |
655 | client->monc.auth->global_id, PR_FSID(fsid)); | |
656 | memcpy(&client->fsid, fsid, sizeof(*fsid)); | |
657 | ceph_debugfs_client_init(client); | |
658 | client->have_fsid = true; | |
659 | } | |
660 | return 0; | |
661 | } | |
662 | ||
16725b9d SW |
663 | /* |
664 | * true if we have the mon map (and have thus joined the cluster) | |
665 | */ | |
666 | static int have_mon_map(struct ceph_client *client) | |
667 | { | |
668 | return client->monc.monmap && client->monc.monmap->epoch; | |
669 | } | |
670 | ||
671 | /* | |
672 | * Bootstrap mount by opening the root directory. Note the mount | |
673 | * @started time from caller, and time out if this takes too long. | |
674 | */ | |
675 | static struct dentry *open_root_dentry(struct ceph_client *client, | |
676 | const char *path, | |
677 | unsigned long started) | |
678 | { | |
679 | struct ceph_mds_client *mdsc = &client->mdsc; | |
680 | struct ceph_mds_request *req = NULL; | |
681 | int err; | |
682 | struct dentry *root; | |
683 | ||
684 | /* open dir */ | |
685 | dout("open_root_inode opening '%s'\n", path); | |
686 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
687 | if (IS_ERR(req)) | |
688 | return ERR_PTR(PTR_ERR(req)); | |
689 | req->r_path1 = kstrdup(path, GFP_NOFS); | |
690 | req->r_ino1.ino = CEPH_INO_ROOT; | |
691 | req->r_ino1.snap = CEPH_NOSNAP; | |
692 | req->r_started = started; | |
6b805185 | 693 | req->r_timeout = client->mount_args->mount_timeout * HZ; |
16725b9d SW |
694 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
695 | req->r_num_caps = 2; | |
696 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
697 | if (err == 0) { | |
698 | dout("open_root_inode success\n"); | |
699 | if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && | |
700 | client->sb->s_root == NULL) | |
701 | root = d_alloc_root(req->r_target_inode); | |
702 | else | |
703 | root = d_obtain_alias(req->r_target_inode); | |
704 | req->r_target_inode = NULL; | |
705 | dout("open_root_inode success, root dentry is %p\n", root); | |
706 | } else { | |
707 | root = ERR_PTR(err); | |
708 | } | |
709 | ceph_mdsc_put_request(req); | |
710 | return root; | |
711 | } | |
712 | ||
713 | /* | |
714 | * mount: join the ceph cluster, and open root directory. | |
715 | */ | |
716 | static int ceph_mount(struct ceph_client *client, struct vfsmount *mnt, | |
717 | const char *path) | |
718 | { | |
719 | struct ceph_entity_addr *myaddr = NULL; | |
720 | int err; | |
6b805185 | 721 | unsigned long timeout = client->mount_args->mount_timeout * HZ; |
16725b9d SW |
722 | unsigned long started = jiffies; /* note the start time */ |
723 | struct dentry *root; | |
724 | ||
725 | dout("mount start\n"); | |
726 | mutex_lock(&client->mount_mutex); | |
727 | ||
728 | /* initialize the messenger */ | |
729 | if (client->msgr == NULL) { | |
730 | if (ceph_test_opt(client, MYIP)) | |
6b805185 | 731 | myaddr = &client->mount_args->my_addr; |
16725b9d SW |
732 | client->msgr = ceph_messenger_create(myaddr); |
733 | if (IS_ERR(client->msgr)) { | |
734 | err = PTR_ERR(client->msgr); | |
735 | client->msgr = NULL; | |
736 | goto out; | |
737 | } | |
738 | client->msgr->nocrc = ceph_test_opt(client, NOCRC); | |
739 | } | |
740 | ||
4e7a5dcd SW |
741 | /* open session, and wait for mon, mds, and osd maps */ |
742 | err = ceph_monc_open_session(&client->monc); | |
16725b9d SW |
743 | if (err < 0) |
744 | goto out; | |
745 | ||
4e7a5dcd | 746 | while (!have_mon_map(client)) { |
16725b9d SW |
747 | err = -EIO; |
748 | if (timeout && time_after_eq(jiffies, started + timeout)) | |
749 | goto out; | |
750 | ||
751 | /* wait */ | |
4e7a5dcd | 752 | dout("mount waiting for mon_map\n"); |
9bd2e6f8 SW |
753 | err = wait_event_interruptible_timeout(client->auth_wq, |
754 | have_mon_map(client) || (client->auth_err < 0), | |
16725b9d SW |
755 | timeout); |
756 | if (err == -EINTR || err == -ERESTARTSYS) | |
757 | goto out; | |
9bd2e6f8 SW |
758 | if (client->auth_err < 0) { |
759 | err = client->auth_err; | |
dc14657c YS |
760 | goto out; |
761 | } | |
16725b9d SW |
762 | } |
763 | ||
764 | dout("mount opening root\n"); | |
765 | root = open_root_dentry(client, "", started); | |
766 | if (IS_ERR(root)) { | |
767 | err = PTR_ERR(root); | |
768 | goto out; | |
769 | } | |
770 | if (client->sb->s_root) | |
771 | dput(root); | |
772 | else | |
773 | client->sb->s_root = root; | |
774 | ||
775 | if (path[0] == 0) { | |
776 | dget(root); | |
777 | } else { | |
778 | dout("mount opening base mountpoint\n"); | |
779 | root = open_root_dentry(client, path, started); | |
780 | if (IS_ERR(root)) { | |
781 | err = PTR_ERR(root); | |
782 | dput(client->sb->s_root); | |
783 | client->sb->s_root = NULL; | |
784 | goto out; | |
785 | } | |
786 | } | |
787 | ||
788 | mnt->mnt_root = root; | |
789 | mnt->mnt_sb = client->sb; | |
790 | ||
791 | client->mount_state = CEPH_MOUNT_MOUNTED; | |
792 | dout("mount success\n"); | |
793 | err = 0; | |
794 | ||
795 | out: | |
796 | mutex_unlock(&client->mount_mutex); | |
797 | return err; | |
798 | } | |
799 | ||
800 | static int ceph_set_super(struct super_block *s, void *data) | |
801 | { | |
802 | struct ceph_client *client = data; | |
803 | int ret; | |
804 | ||
805 | dout("set_super %p data %p\n", s, data); | |
806 | ||
6b805185 | 807 | s->s_flags = client->mount_args->sb_flags; |
16725b9d SW |
808 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
809 | ||
810 | s->s_fs_info = client; | |
811 | client->sb = s; | |
812 | ||
813 | s->s_op = &ceph_super_ops; | |
814 | s->s_export_op = &ceph_export_ops; | |
815 | ||
816 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
817 | ||
818 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
819 | if (ret != 0) | |
820 | goto fail; | |
821 | ||
822 | return ret; | |
823 | ||
824 | fail: | |
825 | s->s_fs_info = NULL; | |
826 | client->sb = NULL; | |
827 | return ret; | |
828 | } | |
829 | ||
830 | /* | |
831 | * share superblock if same fs AND options | |
832 | */ | |
833 | static int ceph_compare_super(struct super_block *sb, void *data) | |
834 | { | |
835 | struct ceph_client *new = data; | |
6b805185 | 836 | struct ceph_mount_args *args = new->mount_args; |
16725b9d SW |
837 | struct ceph_client *other = ceph_sb_to_client(sb); |
838 | int i; | |
839 | ||
840 | dout("ceph_compare_super %p\n", sb); | |
841 | if (args->flags & CEPH_OPT_FSID) { | |
842 | if (ceph_fsid_compare(&args->fsid, &other->fsid)) { | |
843 | dout("fsid doesn't match\n"); | |
844 | return 0; | |
845 | } | |
846 | } else { | |
847 | /* do we share (a) monitor? */ | |
848 | for (i = 0; i < new->monc.monmap->num_mon; i++) | |
849 | if (ceph_monmap_contains(other->monc.monmap, | |
850 | &new->monc.monmap->mon_inst[i].addr)) | |
851 | break; | |
852 | if (i == new->monc.monmap->num_mon) { | |
853 | dout("mon ip not part of monmap\n"); | |
854 | return 0; | |
855 | } | |
856 | dout("mon ip matches existing sb %p\n", sb); | |
857 | } | |
6b805185 | 858 | if (args->sb_flags != other->mount_args->sb_flags) { |
16725b9d SW |
859 | dout("flags differ\n"); |
860 | return 0; | |
861 | } | |
862 | return 1; | |
863 | } | |
864 | ||
865 | /* | |
866 | * construct our own bdi so we can control readahead, etc. | |
867 | */ | |
859e7b14 | 868 | static int ceph_register_bdi(struct super_block *sb, struct ceph_client *client) |
16725b9d SW |
869 | { |
870 | int err; | |
871 | ||
f2cf418c | 872 | sb->s_bdi = &client->backing_dev_info; |
16725b9d SW |
873 | |
874 | /* set ra_pages based on rsize mount option? */ | |
6b805185 | 875 | if (client->mount_args->rsize >= PAGE_CACHE_SIZE) |
16725b9d | 876 | client->backing_dev_info.ra_pages = |
6b805185 | 877 | (client->mount_args->rsize + PAGE_CACHE_SIZE - 1) |
16725b9d | 878 | >> PAGE_SHIFT; |
16725b9d SW |
879 | err = bdi_register_dev(&client->backing_dev_info, sb->s_dev); |
880 | return err; | |
881 | } | |
882 | ||
883 | static int ceph_get_sb(struct file_system_type *fs_type, | |
884 | int flags, const char *dev_name, void *data, | |
885 | struct vfsmount *mnt) | |
886 | { | |
887 | struct super_block *sb; | |
888 | struct ceph_client *client; | |
889 | int err; | |
890 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 891 | const char *path = NULL; |
6b805185 | 892 | struct ceph_mount_args *args; |
16725b9d SW |
893 | |
894 | dout("ceph_get_sb\n"); | |
6b805185 SW |
895 | args = parse_mount_args(flags, data, dev_name, &path); |
896 | if (IS_ERR(args)) { | |
897 | err = PTR_ERR(args); | |
898 | goto out_final; | |
899 | } | |
16725b9d SW |
900 | |
901 | /* create client (which we may/may not use) */ | |
6b805185 SW |
902 | client = ceph_create_client(args); |
903 | if (IS_ERR(client)) { | |
904 | err = PTR_ERR(client); | |
905 | goto out_final; | |
906 | } | |
16725b9d | 907 | |
6b805185 | 908 | if (client->mount_args->flags & CEPH_OPT_NOSHARE) |
16725b9d SW |
909 | compare_super = NULL; |
910 | sb = sget(fs_type, compare_super, ceph_set_super, client); | |
911 | if (IS_ERR(sb)) { | |
912 | err = PTR_ERR(sb); | |
913 | goto out; | |
914 | } | |
915 | ||
916 | if (ceph_client(sb) != client) { | |
917 | ceph_destroy_client(client); | |
918 | client = ceph_client(sb); | |
919 | dout("get_sb got existing client %p\n", client); | |
920 | } else { | |
921 | dout("get_sb using new client %p\n", client); | |
859e7b14 | 922 | err = ceph_register_bdi(sb, client); |
16725b9d SW |
923 | if (err < 0) |
924 | goto out_splat; | |
925 | } | |
926 | ||
927 | err = ceph_mount(client, mnt, path); | |
928 | if (err < 0) | |
929 | goto out_splat; | |
930 | dout("root %p inode %p ino %llx.%llx\n", mnt->mnt_root, | |
931 | mnt->mnt_root->d_inode, ceph_vinop(mnt->mnt_root->d_inode)); | |
932 | return 0; | |
933 | ||
934 | out_splat: | |
935 | ceph_mdsc_close_sessions(&client->mdsc); | |
936 | up_write(&sb->s_umount); | |
937 | deactivate_super(sb); | |
938 | goto out_final; | |
939 | ||
940 | out: | |
941 | ceph_destroy_client(client); | |
942 | out_final: | |
943 | dout("ceph_get_sb fail %d\n", err); | |
944 | return err; | |
945 | } | |
946 | ||
947 | static void ceph_kill_sb(struct super_block *s) | |
948 | { | |
949 | struct ceph_client *client = ceph_sb_to_client(s); | |
950 | dout("kill_sb %p\n", s); | |
951 | ceph_mdsc_pre_umount(&client->mdsc); | |
16725b9d | 952 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
e0e32710 SW |
953 | if (s->s_bdi == &client->backing_dev_info) |
954 | bdi_unregister(&client->backing_dev_info); | |
16725b9d SW |
955 | bdi_destroy(&client->backing_dev_info); |
956 | ceph_destroy_client(client); | |
957 | } | |
958 | ||
959 | static struct file_system_type ceph_fs_type = { | |
960 | .owner = THIS_MODULE, | |
961 | .name = "ceph", | |
962 | .get_sb = ceph_get_sb, | |
963 | .kill_sb = ceph_kill_sb, | |
964 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
965 | }; | |
966 | ||
967 | #define _STRINGIFY(x) #x | |
968 | #define STRINGIFY(x) _STRINGIFY(x) | |
969 | ||
970 | static int __init init_ceph(void) | |
971 | { | |
972 | int ret = 0; | |
973 | ||
974 | ret = ceph_debugfs_init(); | |
975 | if (ret < 0) | |
976 | goto out; | |
977 | ||
978 | ret = ceph_msgr_init(); | |
979 | if (ret < 0) | |
980 | goto out_debugfs; | |
981 | ||
982 | ret = init_caches(); | |
983 | if (ret) | |
984 | goto out_msgr; | |
985 | ||
986 | ceph_caps_init(); | |
987 | ||
988 | ret = register_filesystem(&ceph_fs_type); | |
989 | if (ret) | |
990 | goto out_icache; | |
991 | ||
fa0b72e9 SW |
992 | pr_info("loaded %d.%d.%d (mon/mds/osd proto %d/%d/%d)\n", |
993 | CEPH_VERSION_MAJOR, CEPH_VERSION_MINOR, CEPH_VERSION_PATCH, | |
994 | CEPH_MONC_PROTOCOL, CEPH_MDSC_PROTOCOL, CEPH_OSDC_PROTOCOL); | |
16725b9d SW |
995 | return 0; |
996 | ||
997 | out_icache: | |
998 | destroy_caches(); | |
999 | out_msgr: | |
1000 | ceph_msgr_exit(); | |
1001 | out_debugfs: | |
1002 | ceph_debugfs_cleanup(); | |
1003 | out: | |
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | static void __exit exit_ceph(void) | |
1008 | { | |
1009 | dout("exit_ceph\n"); | |
1010 | unregister_filesystem(&ceph_fs_type); | |
1011 | ceph_caps_finalize(); | |
1012 | destroy_caches(); | |
1013 | ceph_msgr_exit(); | |
1014 | ceph_debugfs_cleanup(); | |
1015 | } | |
1016 | ||
1017 | module_init(init_ceph); | |
1018 | module_exit(exit_ceph); | |
1019 | ||
1020 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1021 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1022 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1023 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1024 | MODULE_LICENSE("GPL"); |