Commit | Line | Data |
---|---|---|
16725b9d SW |
1 | |
2 | #include "ceph_debug.h" | |
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 SW |
18 | #include "decode.h" |
19 | #include "super.h" | |
20 | #include "mon_client.h" | |
0743304d | 21 | #include "auth.h" |
16725b9d SW |
22 | |
23 | /* | |
24 | * Ceph superblock operations | |
25 | * | |
26 | * Handle the basics of mounting, unmounting. | |
27 | */ | |
28 | ||
29 | ||
30 | /* | |
31 | * find filename portion of a path (/foo/bar/baz -> baz) | |
32 | */ | |
33 | const char *ceph_file_part(const char *s, int len) | |
34 | { | |
35 | const char *e = s + len; | |
36 | ||
37 | while (e != s && *(e-1) != '/') | |
38 | e--; | |
39 | return e; | |
40 | } | |
41 | ||
42 | ||
43 | /* | |
44 | * super ops | |
45 | */ | |
46 | static void ceph_put_super(struct super_block *s) | |
47 | { | |
5dfc589a | 48 | struct ceph_client *client = ceph_sb_to_client(s); |
16725b9d SW |
49 | |
50 | dout("put_super\n"); | |
5dfc589a SW |
51 | ceph_mdsc_close_sessions(&client->mdsc); |
52 | ||
53 | /* | |
54 | * ensure we release the bdi before put_anon_super releases | |
55 | * the device name. | |
56 | */ | |
57 | if (s->s_bdi == &client->backing_dev_info) { | |
58 | bdi_unregister(&client->backing_dev_info); | |
59 | s->s_bdi = NULL; | |
60 | } | |
61 | ||
16725b9d SW |
62 | return; |
63 | } | |
64 | ||
65 | static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) | |
66 | { | |
67 | struct ceph_client *client = ceph_inode_to_client(dentry->d_inode); | |
68 | struct ceph_monmap *monmap = client->monc.monmap; | |
69 | struct ceph_statfs st; | |
70 | u64 fsid; | |
71 | int err; | |
72 | ||
73 | dout("statfs\n"); | |
74 | err = ceph_monc_do_statfs(&client->monc, &st); | |
75 | if (err < 0) | |
76 | return err; | |
77 | ||
78 | /* fill in kstatfs */ | |
79 | buf->f_type = CEPH_SUPER_MAGIC; /* ?? */ | |
80 | ||
81 | /* | |
82 | * express utilization in terms of large blocks to avoid | |
83 | * overflow on 32-bit machines. | |
84 | */ | |
85 | buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; | |
86 | buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); | |
87 | buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >> | |
88 | (CEPH_BLOCK_SHIFT-10); | |
89 | buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); | |
90 | ||
91 | buf->f_files = le64_to_cpu(st.num_objects); | |
92 | buf->f_ffree = -1; | |
558d3499 | 93 | buf->f_namelen = NAME_MAX; |
16725b9d SW |
94 | buf->f_frsize = PAGE_CACHE_SIZE; |
95 | ||
96 | /* leave fsid little-endian, regardless of host endianness */ | |
97 | fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1); | |
98 | buf->f_fsid.val[0] = fsid & 0xffffffff; | |
99 | buf->f_fsid.val[1] = fsid >> 32; | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | ||
105 | static int ceph_syncfs(struct super_block *sb, int wait) | |
106 | { | |
107 | dout("sync_fs %d\n", wait); | |
640ef79d CR |
108 | ceph_osdc_sync(&ceph_sb_to_client(sb)->osdc); |
109 | ceph_mdsc_sync(&ceph_sb_to_client(sb)->mdsc); | |
f2cf418c | 110 | dout("sync_fs %d done\n", wait); |
16725b9d SW |
111 | return 0; |
112 | } | |
113 | ||
6e19a16e SW |
114 | static int default_congestion_kb(void) |
115 | { | |
116 | int congestion_kb; | |
117 | ||
118 | /* | |
119 | * Copied from NFS | |
120 | * | |
121 | * congestion size, scale with available memory. | |
122 | * | |
123 | * 64MB: 8192k | |
124 | * 128MB: 11585k | |
125 | * 256MB: 16384k | |
126 | * 512MB: 23170k | |
127 | * 1GB: 32768k | |
128 | * 2GB: 46340k | |
129 | * 4GB: 65536k | |
130 | * 8GB: 92681k | |
131 | * 16GB: 131072k | |
132 | * | |
133 | * This allows larger machines to have larger/more transfers. | |
134 | * Limit the default to 256M | |
135 | */ | |
136 | congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); | |
137 | if (congestion_kb > 256*1024) | |
138 | congestion_kb = 256*1024; | |
139 | ||
140 | return congestion_kb; | |
141 | } | |
16725b9d SW |
142 | |
143 | /** | |
144 | * ceph_show_options - Show mount options in /proc/mounts | |
145 | * @m: seq_file to write to | |
146 | * @mnt: mount descriptor | |
147 | */ | |
148 | static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt) | |
149 | { | |
150 | struct ceph_client *client = ceph_sb_to_client(mnt->mnt_sb); | |
6b805185 | 151 | struct ceph_mount_args *args = client->mount_args; |
16725b9d SW |
152 | |
153 | if (args->flags & CEPH_OPT_FSID) | |
a8b763a9 | 154 | seq_printf(m, ",fsid=%pU", &args->fsid); |
16725b9d SW |
155 | if (args->flags & CEPH_OPT_NOSHARE) |
156 | seq_puts(m, ",noshare"); | |
157 | if (args->flags & CEPH_OPT_DIRSTAT) | |
158 | seq_puts(m, ",dirstat"); | |
159 | if ((args->flags & CEPH_OPT_RBYTES) == 0) | |
160 | seq_puts(m, ",norbytes"); | |
161 | if (args->flags & CEPH_OPT_NOCRC) | |
162 | seq_puts(m, ",nocrc"); | |
163 | if (args->flags & CEPH_OPT_NOASYNCREADDIR) | |
164 | seq_puts(m, ",noasyncreaddir"); | |
6e19a16e SW |
165 | |
166 | if (args->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) | |
167 | seq_printf(m, ",mount_timeout=%d", args->mount_timeout); | |
168 | if (args->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) | |
169 | seq_printf(m, ",osd_idle_ttl=%d", args->osd_idle_ttl); | |
170 | if (args->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT) | |
171 | seq_printf(m, ",osdtimeout=%d", args->osd_timeout); | |
172 | if (args->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) | |
173 | seq_printf(m, ",osdkeepalivetimeout=%d", | |
174 | args->osd_keepalive_timeout); | |
175 | if (args->wsize) | |
176 | seq_printf(m, ",wsize=%d", args->wsize); | |
177 | if (args->rsize != CEPH_MOUNT_RSIZE_DEFAULT) | |
178 | seq_printf(m, ",rsize=%d", args->rsize); | |
179 | if (args->congestion_kb != default_congestion_kb()) | |
180 | seq_printf(m, ",write_congestion_kb=%d", args->congestion_kb); | |
181 | if (args->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT) | |
182 | seq_printf(m, ",caps_wanted_delay_min=%d", | |
183 | args->caps_wanted_delay_min); | |
184 | if (args->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT) | |
185 | seq_printf(m, ",caps_wanted_delay_max=%d", | |
186 | args->caps_wanted_delay_max); | |
187 | if (args->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT) | |
188 | seq_printf(m, ",cap_release_safety=%d", | |
189 | args->cap_release_safety); | |
190 | if (args->max_readdir != CEPH_MAX_READDIR_DEFAULT) | |
191 | seq_printf(m, ",readdir_max_entries=%d", args->max_readdir); | |
23804d91 SW |
192 | if (args->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT) |
193 | seq_printf(m, ",readdir_max_bytes=%d", args->max_readdir_bytes); | |
16725b9d SW |
194 | if (strcmp(args->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT)) |
195 | seq_printf(m, ",snapdirname=%s", args->snapdir_name); | |
4e7a5dcd SW |
196 | if (args->name) |
197 | seq_printf(m, ",name=%s", args->name); | |
16725b9d SW |
198 | if (args->secret) |
199 | seq_puts(m, ",secret=<hidden>"); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | /* | |
204 | * caches | |
205 | */ | |
206 | struct kmem_cache *ceph_inode_cachep; | |
207 | struct kmem_cache *ceph_cap_cachep; | |
208 | struct kmem_cache *ceph_dentry_cachep; | |
209 | struct kmem_cache *ceph_file_cachep; | |
210 | ||
211 | static void ceph_inode_init_once(void *foo) | |
212 | { | |
213 | struct ceph_inode_info *ci = foo; | |
214 | inode_init_once(&ci->vfs_inode); | |
215 | } | |
216 | ||
217 | static int __init init_caches(void) | |
218 | { | |
219 | ceph_inode_cachep = kmem_cache_create("ceph_inode_info", | |
220 | sizeof(struct ceph_inode_info), | |
221 | __alignof__(struct ceph_inode_info), | |
222 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD), | |
223 | ceph_inode_init_once); | |
224 | if (ceph_inode_cachep == NULL) | |
225 | return -ENOMEM; | |
226 | ||
227 | ceph_cap_cachep = KMEM_CACHE(ceph_cap, | |
228 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
229 | if (ceph_cap_cachep == NULL) | |
230 | goto bad_cap; | |
231 | ||
232 | ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info, | |
233 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
234 | if (ceph_dentry_cachep == NULL) | |
235 | goto bad_dentry; | |
236 | ||
237 | ceph_file_cachep = KMEM_CACHE(ceph_file_info, | |
238 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); | |
239 | if (ceph_file_cachep == NULL) | |
240 | goto bad_file; | |
241 | ||
242 | return 0; | |
243 | ||
244 | bad_file: | |
245 | kmem_cache_destroy(ceph_dentry_cachep); | |
246 | bad_dentry: | |
247 | kmem_cache_destroy(ceph_cap_cachep); | |
248 | bad_cap: | |
249 | kmem_cache_destroy(ceph_inode_cachep); | |
250 | return -ENOMEM; | |
251 | } | |
252 | ||
253 | static void destroy_caches(void) | |
254 | { | |
255 | kmem_cache_destroy(ceph_inode_cachep); | |
256 | kmem_cache_destroy(ceph_cap_cachep); | |
257 | kmem_cache_destroy(ceph_dentry_cachep); | |
258 | kmem_cache_destroy(ceph_file_cachep); | |
259 | } | |
260 | ||
261 | ||
262 | /* | |
263 | * ceph_umount_begin - initiate forced umount. Tear down down the | |
264 | * mount, skipping steps that may hang while waiting for server(s). | |
265 | */ | |
266 | static void ceph_umount_begin(struct super_block *sb) | |
267 | { | |
268 | struct ceph_client *client = ceph_sb_to_client(sb); | |
269 | ||
270 | dout("ceph_umount_begin - starting forced umount\n"); | |
271 | if (!client) | |
272 | return; | |
273 | client->mount_state = CEPH_MOUNT_SHUTDOWN; | |
274 | return; | |
275 | } | |
276 | ||
277 | static const struct super_operations ceph_super_ops = { | |
278 | .alloc_inode = ceph_alloc_inode, | |
279 | .destroy_inode = ceph_destroy_inode, | |
280 | .write_inode = ceph_write_inode, | |
281 | .sync_fs = ceph_syncfs, | |
282 | .put_super = ceph_put_super, | |
283 | .show_options = ceph_show_options, | |
284 | .statfs = ceph_statfs, | |
285 | .umount_begin = ceph_umount_begin, | |
286 | }; | |
287 | ||
288 | ||
289 | const char *ceph_msg_type_name(int type) | |
290 | { | |
291 | switch (type) { | |
292 | case CEPH_MSG_SHUTDOWN: return "shutdown"; | |
293 | case CEPH_MSG_PING: return "ping"; | |
4e7a5dcd SW |
294 | case CEPH_MSG_AUTH: return "auth"; |
295 | case CEPH_MSG_AUTH_REPLY: return "auth_reply"; | |
16725b9d SW |
296 | case CEPH_MSG_MON_MAP: return "mon_map"; |
297 | case CEPH_MSG_MON_GET_MAP: return "mon_get_map"; | |
298 | case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe"; | |
299 | case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack"; | |
16725b9d SW |
300 | case CEPH_MSG_STATFS: return "statfs"; |
301 | case CEPH_MSG_STATFS_REPLY: return "statfs_reply"; | |
16725b9d SW |
302 | case CEPH_MSG_MDS_MAP: return "mds_map"; |
303 | case CEPH_MSG_CLIENT_SESSION: return "client_session"; | |
304 | case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect"; | |
305 | case CEPH_MSG_CLIENT_REQUEST: return "client_request"; | |
306 | case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward"; | |
307 | case CEPH_MSG_CLIENT_REPLY: return "client_reply"; | |
308 | case CEPH_MSG_CLIENT_CAPS: return "client_caps"; | |
309 | case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; | |
310 | case CEPH_MSG_CLIENT_SNAP: return "client_snap"; | |
311 | case CEPH_MSG_CLIENT_LEASE: return "client_lease"; | |
16725b9d SW |
312 | case CEPH_MSG_OSD_MAP: return "osd_map"; |
313 | case CEPH_MSG_OSD_OP: return "osd_op"; | |
314 | case CEPH_MSG_OSD_OPREPLY: return "osd_opreply"; | |
315 | default: return "unknown"; | |
316 | } | |
317 | } | |
318 | ||
319 | ||
320 | /* | |
321 | * mount options | |
322 | */ | |
323 | enum { | |
16725b9d SW |
324 | Opt_wsize, |
325 | Opt_rsize, | |
326 | Opt_osdtimeout, | |
422d2cb8 | 327 | Opt_osdkeepalivetimeout, |
16725b9d | 328 | Opt_mount_timeout, |
f5a2041b | 329 | Opt_osd_idle_ttl, |
16725b9d SW |
330 | Opt_caps_wanted_delay_min, |
331 | Opt_caps_wanted_delay_max, | |
6e19a16e | 332 | Opt_cap_release_safety, |
16725b9d | 333 | Opt_readdir_max_entries, |
23804d91 | 334 | Opt_readdir_max_bytes, |
2baba250 | 335 | Opt_congestion_kb, |
e53c2fe0 | 336 | Opt_last_int, |
16725b9d | 337 | /* int args above */ |
c309f0ab | 338 | Opt_fsid, |
16725b9d | 339 | Opt_snapdirname, |
4e7a5dcd | 340 | Opt_name, |
16725b9d | 341 | Opt_secret, |
e53c2fe0 | 342 | Opt_last_string, |
16725b9d SW |
343 | /* string args above */ |
344 | Opt_ip, | |
345 | Opt_noshare, | |
346 | Opt_dirstat, | |
347 | Opt_nodirstat, | |
348 | Opt_rbytes, | |
349 | Opt_norbytes, | |
350 | Opt_nocrc, | |
351 | Opt_noasyncreaddir, | |
352 | }; | |
353 | ||
354 | static match_table_t arg_tokens = { | |
16725b9d SW |
355 | {Opt_wsize, "wsize=%d"}, |
356 | {Opt_rsize, "rsize=%d"}, | |
357 | {Opt_osdtimeout, "osdtimeout=%d"}, | |
422d2cb8 | 358 | {Opt_osdkeepalivetimeout, "osdkeepalive=%d"}, |
16725b9d | 359 | {Opt_mount_timeout, "mount_timeout=%d"}, |
f5a2041b | 360 | {Opt_osd_idle_ttl, "osd_idle_ttl=%d"}, |
16725b9d SW |
361 | {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"}, |
362 | {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"}, | |
6e19a16e | 363 | {Opt_cap_release_safety, "cap_release_safety=%d"}, |
16725b9d | 364 | {Opt_readdir_max_entries, "readdir_max_entries=%d"}, |
23804d91 | 365 | {Opt_readdir_max_bytes, "readdir_max_bytes=%d"}, |
2baba250 | 366 | {Opt_congestion_kb, "write_congestion_kb=%d"}, |
16725b9d | 367 | /* int args above */ |
c309f0ab | 368 | {Opt_fsid, "fsid=%s"}, |
16725b9d | 369 | {Opt_snapdirname, "snapdirname=%s"}, |
4e7a5dcd | 370 | {Opt_name, "name=%s"}, |
16725b9d SW |
371 | {Opt_secret, "secret=%s"}, |
372 | /* string args above */ | |
373 | {Opt_ip, "ip=%s"}, | |
374 | {Opt_noshare, "noshare"}, | |
375 | {Opt_dirstat, "dirstat"}, | |
376 | {Opt_nodirstat, "nodirstat"}, | |
377 | {Opt_rbytes, "rbytes"}, | |
378 | {Opt_norbytes, "norbytes"}, | |
379 | {Opt_nocrc, "nocrc"}, | |
380 | {Opt_noasyncreaddir, "noasyncreaddir"}, | |
381 | {-1, NULL} | |
382 | }; | |
383 | ||
c309f0ab SW |
384 | static int parse_fsid(const char *str, struct ceph_fsid *fsid) |
385 | { | |
386 | int i = 0; | |
387 | char tmp[3]; | |
388 | int err = -EINVAL; | |
389 | int d; | |
390 | ||
391 | dout("parse_fsid '%s'\n", str); | |
392 | tmp[2] = 0; | |
393 | while (*str && i < 16) { | |
394 | if (ispunct(*str)) { | |
395 | str++; | |
396 | continue; | |
397 | } | |
398 | if (!isxdigit(str[0]) || !isxdigit(str[1])) | |
399 | break; | |
400 | tmp[0] = str[0]; | |
401 | tmp[1] = str[1]; | |
402 | if (sscanf(tmp, "%x", &d) < 1) | |
403 | break; | |
404 | fsid->fsid[i] = d & 0xff; | |
405 | i++; | |
406 | str += 2; | |
407 | } | |
408 | ||
409 | if (i == 16) | |
410 | err = 0; | |
a8b763a9 | 411 | dout("parse_fsid ret %d got fsid %pU", err, fsid); |
c309f0ab SW |
412 | return err; |
413 | } | |
16725b9d | 414 | |
6b805185 SW |
415 | static struct ceph_mount_args *parse_mount_args(int flags, char *options, |
416 | const char *dev_name, | |
417 | const char **path) | |
16725b9d | 418 | { |
6b805185 | 419 | struct ceph_mount_args *args; |
16725b9d | 420 | const char *c; |
6b805185 | 421 | int err = -ENOMEM; |
16725b9d | 422 | substring_t argstr[MAX_OPT_ARGS]; |
16725b9d | 423 | |
6b805185 SW |
424 | args = kzalloc(sizeof(*args), GFP_KERNEL); |
425 | if (!args) | |
426 | return ERR_PTR(-ENOMEM); | |
427 | args->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*args->mon_addr), | |
428 | GFP_KERNEL); | |
429 | if (!args->mon_addr) | |
430 | goto out; | |
16725b9d | 431 | |
6b805185 | 432 | dout("parse_mount_args %p, dev_name '%s'\n", args, dev_name); |
7b813c46 | 433 | |
16725b9d SW |
434 | /* start with defaults */ |
435 | args->sb_flags = flags; | |
436 | args->flags = CEPH_OPT_DEFAULT; | |
422d2cb8 YS |
437 | args->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT; |
438 | args->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT; | |
16725b9d | 439 | args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */ |
f5a2041b | 440 | args->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */ |
16725b9d SW |
441 | args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT; |
442 | args->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT; | |
8fa97655 | 443 | args->rsize = CEPH_MOUNT_RSIZE_DEFAULT; |
16725b9d | 444 | args->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |
6e19a16e SW |
445 | args->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT; |
446 | args->max_readdir = CEPH_MAX_READDIR_DEFAULT; | |
23804d91 | 447 | args->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; |
2baba250 | 448 | args->congestion_kb = default_congestion_kb(); |
16725b9d SW |
449 | |
450 | /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */ | |
7b813c46 | 451 | err = -EINVAL; |
16725b9d | 452 | if (!dev_name) |
7b813c46 | 453 | goto out; |
16725b9d SW |
454 | *path = strstr(dev_name, ":/"); |
455 | if (*path == NULL) { | |
456 | pr_err("device name is missing path (no :/ in %s)\n", | |
457 | dev_name); | |
7b813c46 | 458 | goto out; |
16725b9d SW |
459 | } |
460 | ||
461 | /* get mon ip(s) */ | |
6b805185 SW |
462 | err = ceph_parse_ips(dev_name, *path, args->mon_addr, |
463 | CEPH_MAX_MON, &args->num_mon); | |
16725b9d | 464 | if (err < 0) |
7b813c46 | 465 | goto out; |
16725b9d | 466 | |
16725b9d SW |
467 | /* path on server */ |
468 | *path += 2; | |
469 | dout("server path '%s'\n", *path); | |
470 | ||
471 | /* parse mount options */ | |
472 | while ((c = strsep(&options, ",")) != NULL) { | |
473 | int token, intval, ret; | |
474 | if (!*c) | |
475 | continue; | |
7b813c46 | 476 | err = -EINVAL; |
16725b9d SW |
477 | token = match_token((char *)c, arg_tokens, argstr); |
478 | if (token < 0) { | |
479 | pr_err("bad mount option at '%s'\n", c); | |
7b813c46 | 480 | goto out; |
16725b9d | 481 | } |
e53c2fe0 | 482 | if (token < Opt_last_int) { |
16725b9d SW |
483 | ret = match_int(&argstr[0], &intval); |
484 | if (ret < 0) { | |
485 | pr_err("bad mount option arg (not int) " | |
486 | "at '%s'\n", c); | |
487 | continue; | |
488 | } | |
e53c2fe0 SW |
489 | dout("got int token %d val %d\n", token, intval); |
490 | } else if (token > Opt_last_int && token < Opt_last_string) { | |
491 | dout("got string token %d val %s\n", token, | |
492 | argstr[0].from); | |
493 | } else { | |
494 | dout("got token %d\n", token); | |
16725b9d SW |
495 | } |
496 | switch (token) { | |
16725b9d SW |
497 | case Opt_ip: |
498 | err = ceph_parse_ips(argstr[0].from, | |
499 | argstr[0].to, | |
500 | &args->my_addr, | |
501 | 1, NULL); | |
502 | if (err < 0) | |
6b805185 | 503 | goto out; |
16725b9d SW |
504 | args->flags |= CEPH_OPT_MYIP; |
505 | break; | |
506 | ||
c309f0ab SW |
507 | case Opt_fsid: |
508 | err = parse_fsid(argstr[0].from, &args->fsid); | |
509 | if (err == 0) | |
510 | args->flags |= CEPH_OPT_FSID; | |
511 | break; | |
16725b9d SW |
512 | case Opt_snapdirname: |
513 | kfree(args->snapdir_name); | |
514 | args->snapdir_name = kstrndup(argstr[0].from, | |
515 | argstr[0].to-argstr[0].from, | |
516 | GFP_KERNEL); | |
517 | break; | |
4e7a5dcd SW |
518 | case Opt_name: |
519 | args->name = kstrndup(argstr[0].from, | |
520 | argstr[0].to-argstr[0].from, | |
521 | GFP_KERNEL); | |
522 | break; | |
16725b9d SW |
523 | case Opt_secret: |
524 | args->secret = kstrndup(argstr[0].from, | |
525 | argstr[0].to-argstr[0].from, | |
526 | GFP_KERNEL); | |
527 | break; | |
528 | ||
529 | /* misc */ | |
530 | case Opt_wsize: | |
531 | args->wsize = intval; | |
532 | break; | |
533 | case Opt_rsize: | |
534 | args->rsize = intval; | |
535 | break; | |
536 | case Opt_osdtimeout: | |
537 | args->osd_timeout = intval; | |
538 | break; | |
422d2cb8 YS |
539 | case Opt_osdkeepalivetimeout: |
540 | args->osd_keepalive_timeout = intval; | |
541 | break; | |
16725b9d SW |
542 | case Opt_mount_timeout: |
543 | args->mount_timeout = intval; | |
544 | break; | |
545 | case Opt_caps_wanted_delay_min: | |
546 | args->caps_wanted_delay_min = intval; | |
547 | break; | |
548 | case Opt_caps_wanted_delay_max: | |
549 | args->caps_wanted_delay_max = intval; | |
550 | break; | |
551 | case Opt_readdir_max_entries: | |
552 | args->max_readdir = intval; | |
553 | break; | |
23804d91 SW |
554 | case Opt_readdir_max_bytes: |
555 | args->max_readdir_bytes = intval; | |
556 | break; | |
2baba250 YS |
557 | case Opt_congestion_kb: |
558 | args->congestion_kb = intval; | |
559 | break; | |
16725b9d SW |
560 | |
561 | case Opt_noshare: | |
562 | args->flags |= CEPH_OPT_NOSHARE; | |
563 | break; | |
564 | ||
565 | case Opt_dirstat: | |
566 | args->flags |= CEPH_OPT_DIRSTAT; | |
567 | break; | |
568 | case Opt_nodirstat: | |
569 | args->flags &= ~CEPH_OPT_DIRSTAT; | |
570 | break; | |
571 | case Opt_rbytes: | |
572 | args->flags |= CEPH_OPT_RBYTES; | |
573 | break; | |
574 | case Opt_norbytes: | |
575 | args->flags &= ~CEPH_OPT_RBYTES; | |
576 | break; | |
577 | case Opt_nocrc: | |
578 | args->flags |= CEPH_OPT_NOCRC; | |
579 | break; | |
580 | case Opt_noasyncreaddir: | |
581 | args->flags |= CEPH_OPT_NOASYNCREADDIR; | |
582 | break; | |
583 | ||
584 | default: | |
585 | BUG_ON(token); | |
586 | } | |
587 | } | |
6b805185 | 588 | return args; |
16725b9d | 589 | |
7b813c46 | 590 | out: |
6b805185 SW |
591 | kfree(args->mon_addr); |
592 | kfree(args); | |
593 | return ERR_PTR(err); | |
16725b9d SW |
594 | } |
595 | ||
6b805185 | 596 | static void destroy_mount_args(struct ceph_mount_args *args) |
16725b9d | 597 | { |
6b805185 | 598 | dout("destroy_mount_args %p\n", args); |
16725b9d SW |
599 | kfree(args->snapdir_name); |
600 | args->snapdir_name = NULL; | |
4e7a5dcd SW |
601 | kfree(args->name); |
602 | args->name = NULL; | |
16725b9d SW |
603 | kfree(args->secret); |
604 | args->secret = NULL; | |
6b805185 | 605 | kfree(args); |
16725b9d SW |
606 | } |
607 | ||
608 | /* | |
609 | * create a fresh client instance | |
610 | */ | |
6b805185 | 611 | static struct ceph_client *ceph_create_client(struct ceph_mount_args *args) |
16725b9d SW |
612 | { |
613 | struct ceph_client *client; | |
614 | int err = -ENOMEM; | |
615 | ||
616 | client = kzalloc(sizeof(*client), GFP_KERNEL); | |
617 | if (client == NULL) | |
618 | return ERR_PTR(-ENOMEM); | |
619 | ||
620 | mutex_init(&client->mount_mutex); | |
621 | ||
9bd2e6f8 | 622 | init_waitqueue_head(&client->auth_wq); |
16725b9d SW |
623 | |
624 | client->sb = NULL; | |
625 | client->mount_state = CEPH_MOUNT_MOUNTING; | |
6b805185 | 626 | client->mount_args = args; |
16725b9d SW |
627 | |
628 | client->msgr = NULL; | |
629 | ||
9bd2e6f8 | 630 | client->auth_err = 0; |
2baba250 | 631 | atomic_long_set(&client->writeback_count, 0); |
16725b9d | 632 | |
859e7b14 SW |
633 | err = bdi_init(&client->backing_dev_info); |
634 | if (err < 0) | |
635 | goto fail; | |
636 | ||
16725b9d SW |
637 | err = -ENOMEM; |
638 | client->wb_wq = create_workqueue("ceph-writeback"); | |
639 | if (client->wb_wq == NULL) | |
859e7b14 | 640 | goto fail_bdi; |
16725b9d SW |
641 | client->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid"); |
642 | if (client->pg_inv_wq == NULL) | |
643 | goto fail_wb_wq; | |
644 | client->trunc_wq = create_singlethread_workqueue("ceph-trunc"); | |
645 | if (client->trunc_wq == NULL) | |
646 | goto fail_pg_inv_wq; | |
647 | ||
b9bfb93c SW |
648 | /* set up mempools */ |
649 | err = -ENOMEM; | |
650 | client->wb_pagevec_pool = mempool_create_kmalloc_pool(10, | |
651 | client->mount_args->wsize >> PAGE_CACHE_SHIFT); | |
652 | if (!client->wb_pagevec_pool) | |
653 | goto fail_trunc_wq; | |
654 | ||
85ccce43 SW |
655 | /* caps */ |
656 | client->min_caps = args->max_readdir; | |
b9bfb93c | 657 | |
16725b9d SW |
658 | /* subsystems */ |
659 | err = ceph_monc_init(&client->monc, client); | |
660 | if (err < 0) | |
b9bfb93c | 661 | goto fail_mempool; |
16725b9d SW |
662 | err = ceph_osdc_init(&client->osdc, client); |
663 | if (err < 0) | |
664 | goto fail_monc; | |
5f44f142 SW |
665 | err = ceph_mdsc_init(&client->mdsc, client); |
666 | if (err < 0) | |
667 | goto fail_osdc; | |
16725b9d SW |
668 | return client; |
669 | ||
5f44f142 SW |
670 | fail_osdc: |
671 | ceph_osdc_stop(&client->osdc); | |
16725b9d SW |
672 | fail_monc: |
673 | ceph_monc_stop(&client->monc); | |
b9bfb93c SW |
674 | fail_mempool: |
675 | mempool_destroy(client->wb_pagevec_pool); | |
16725b9d SW |
676 | fail_trunc_wq: |
677 | destroy_workqueue(client->trunc_wq); | |
678 | fail_pg_inv_wq: | |
679 | destroy_workqueue(client->pg_inv_wq); | |
680 | fail_wb_wq: | |
681 | destroy_workqueue(client->wb_wq); | |
859e7b14 SW |
682 | fail_bdi: |
683 | bdi_destroy(&client->backing_dev_info); | |
16725b9d SW |
684 | fail: |
685 | kfree(client); | |
686 | return ERR_PTR(err); | |
687 | } | |
688 | ||
689 | static void ceph_destroy_client(struct ceph_client *client) | |
690 | { | |
691 | dout("destroy_client %p\n", client); | |
692 | ||
693 | /* unmount */ | |
694 | ceph_mdsc_stop(&client->mdsc); | |
16725b9d SW |
695 | ceph_osdc_stop(&client->osdc); |
696 | ||
a922d38f SW |
697 | /* |
698 | * make sure mds and osd connections close out before destroying | |
699 | * the auth module, which is needed to free those connections' | |
700 | * ceph_authorizers. | |
701 | */ | |
702 | ceph_msgr_flush(); | |
703 | ||
704 | ceph_monc_stop(&client->monc); | |
705 | ||
16725b9d SW |
706 | ceph_debugfs_client_cleanup(client); |
707 | destroy_workqueue(client->wb_wq); | |
708 | destroy_workqueue(client->pg_inv_wq); | |
709 | destroy_workqueue(client->trunc_wq); | |
710 | ||
5dfc589a SW |
711 | bdi_destroy(&client->backing_dev_info); |
712 | ||
16725b9d SW |
713 | if (client->msgr) |
714 | ceph_messenger_destroy(client->msgr); | |
b9bfb93c | 715 | mempool_destroy(client->wb_pagevec_pool); |
16725b9d | 716 | |
6b805185 | 717 | destroy_mount_args(client->mount_args); |
16725b9d SW |
718 | |
719 | kfree(client); | |
720 | dout("destroy_client %p done\n", client); | |
721 | } | |
722 | ||
0743304d SW |
723 | /* |
724 | * Initially learn our fsid, or verify an fsid matches. | |
725 | */ | |
726 | int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid) | |
727 | { | |
728 | if (client->have_fsid) { | |
729 | if (ceph_fsid_compare(&client->fsid, fsid)) { | |
a8b763a9 SW |
730 | pr_err("bad fsid, had %pU got %pU", |
731 | &client->fsid, fsid); | |
0743304d SW |
732 | return -1; |
733 | } | |
734 | } else { | |
a8b763a9 SW |
735 | pr_info("client%lld fsid %pU\n", client->monc.auth->global_id, |
736 | fsid); | |
0743304d SW |
737 | memcpy(&client->fsid, fsid, sizeof(*fsid)); |
738 | ceph_debugfs_client_init(client); | |
739 | client->have_fsid = true; | |
740 | } | |
741 | return 0; | |
742 | } | |
743 | ||
16725b9d SW |
744 | /* |
745 | * true if we have the mon map (and have thus joined the cluster) | |
746 | */ | |
6822d00b | 747 | static int have_mon_and_osd_map(struct ceph_client *client) |
16725b9d | 748 | { |
6822d00b SW |
749 | return client->monc.monmap && client->monc.monmap->epoch && |
750 | client->osdc.osdmap && client->osdc.osdmap->epoch; | |
16725b9d SW |
751 | } |
752 | ||
753 | /* | |
754 | * Bootstrap mount by opening the root directory. Note the mount | |
755 | * @started time from caller, and time out if this takes too long. | |
756 | */ | |
757 | static struct dentry *open_root_dentry(struct ceph_client *client, | |
758 | const char *path, | |
759 | unsigned long started) | |
760 | { | |
761 | struct ceph_mds_client *mdsc = &client->mdsc; | |
762 | struct ceph_mds_request *req = NULL; | |
763 | int err; | |
764 | struct dentry *root; | |
765 | ||
766 | /* open dir */ | |
767 | dout("open_root_inode opening '%s'\n", path); | |
768 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); | |
769 | if (IS_ERR(req)) | |
7e34bc52 | 770 | return ERR_CAST(req); |
16725b9d SW |
771 | req->r_path1 = kstrdup(path, GFP_NOFS); |
772 | req->r_ino1.ino = CEPH_INO_ROOT; | |
773 | req->r_ino1.snap = CEPH_NOSNAP; | |
774 | req->r_started = started; | |
6b805185 | 775 | req->r_timeout = client->mount_args->mount_timeout * HZ; |
16725b9d SW |
776 | req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); |
777 | req->r_num_caps = 2; | |
778 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
779 | if (err == 0) { | |
780 | dout("open_root_inode success\n"); | |
781 | if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && | |
782 | client->sb->s_root == NULL) | |
783 | root = d_alloc_root(req->r_target_inode); | |
784 | else | |
785 | root = d_obtain_alias(req->r_target_inode); | |
786 | req->r_target_inode = NULL; | |
787 | dout("open_root_inode success, root dentry is %p\n", root); | |
788 | } else { | |
789 | root = ERR_PTR(err); | |
790 | } | |
791 | ceph_mdsc_put_request(req); | |
792 | return root; | |
793 | } | |
794 | ||
795 | /* | |
796 | * mount: join the ceph cluster, and open root directory. | |
797 | */ | |
798 | static int ceph_mount(struct ceph_client *client, struct vfsmount *mnt, | |
799 | const char *path) | |
800 | { | |
801 | struct ceph_entity_addr *myaddr = NULL; | |
802 | int err; | |
6b805185 | 803 | unsigned long timeout = client->mount_args->mount_timeout * HZ; |
16725b9d SW |
804 | unsigned long started = jiffies; /* note the start time */ |
805 | struct dentry *root; | |
806 | ||
807 | dout("mount start\n"); | |
808 | mutex_lock(&client->mount_mutex); | |
809 | ||
810 | /* initialize the messenger */ | |
811 | if (client->msgr == NULL) { | |
812 | if (ceph_test_opt(client, MYIP)) | |
6b805185 | 813 | myaddr = &client->mount_args->my_addr; |
16725b9d SW |
814 | client->msgr = ceph_messenger_create(myaddr); |
815 | if (IS_ERR(client->msgr)) { | |
816 | err = PTR_ERR(client->msgr); | |
817 | client->msgr = NULL; | |
818 | goto out; | |
819 | } | |
820 | client->msgr->nocrc = ceph_test_opt(client, NOCRC); | |
821 | } | |
822 | ||
4e7a5dcd SW |
823 | /* open session, and wait for mon, mds, and osd maps */ |
824 | err = ceph_monc_open_session(&client->monc); | |
16725b9d SW |
825 | if (err < 0) |
826 | goto out; | |
827 | ||
6822d00b | 828 | while (!have_mon_and_osd_map(client)) { |
16725b9d SW |
829 | err = -EIO; |
830 | if (timeout && time_after_eq(jiffies, started + timeout)) | |
831 | goto out; | |
832 | ||
833 | /* wait */ | |
4e7a5dcd | 834 | dout("mount waiting for mon_map\n"); |
9bd2e6f8 | 835 | err = wait_event_interruptible_timeout(client->auth_wq, |
6822d00b SW |
836 | have_mon_and_osd_map(client) || (client->auth_err < 0), |
837 | timeout); | |
16725b9d SW |
838 | if (err == -EINTR || err == -ERESTARTSYS) |
839 | goto out; | |
9bd2e6f8 SW |
840 | if (client->auth_err < 0) { |
841 | err = client->auth_err; | |
dc14657c YS |
842 | goto out; |
843 | } | |
16725b9d SW |
844 | } |
845 | ||
846 | dout("mount opening root\n"); | |
847 | root = open_root_dentry(client, "", started); | |
848 | if (IS_ERR(root)) { | |
849 | err = PTR_ERR(root); | |
850 | goto out; | |
851 | } | |
852 | if (client->sb->s_root) | |
853 | dput(root); | |
854 | else | |
855 | client->sb->s_root = root; | |
856 | ||
857 | if (path[0] == 0) { | |
858 | dget(root); | |
859 | } else { | |
860 | dout("mount opening base mountpoint\n"); | |
861 | root = open_root_dentry(client, path, started); | |
862 | if (IS_ERR(root)) { | |
863 | err = PTR_ERR(root); | |
864 | dput(client->sb->s_root); | |
865 | client->sb->s_root = NULL; | |
866 | goto out; | |
867 | } | |
868 | } | |
869 | ||
870 | mnt->mnt_root = root; | |
871 | mnt->mnt_sb = client->sb; | |
872 | ||
873 | client->mount_state = CEPH_MOUNT_MOUNTED; | |
874 | dout("mount success\n"); | |
875 | err = 0; | |
876 | ||
877 | out: | |
878 | mutex_unlock(&client->mount_mutex); | |
879 | return err; | |
880 | } | |
881 | ||
882 | static int ceph_set_super(struct super_block *s, void *data) | |
883 | { | |
884 | struct ceph_client *client = data; | |
885 | int ret; | |
886 | ||
887 | dout("set_super %p data %p\n", s, data); | |
888 | ||
6b805185 | 889 | s->s_flags = client->mount_args->sb_flags; |
16725b9d SW |
890 | s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */ |
891 | ||
892 | s->s_fs_info = client; | |
893 | client->sb = s; | |
894 | ||
895 | s->s_op = &ceph_super_ops; | |
896 | s->s_export_op = &ceph_export_ops; | |
897 | ||
898 | s->s_time_gran = 1000; /* 1000 ns == 1 us */ | |
899 | ||
900 | ret = set_anon_super(s, NULL); /* what is that second arg for? */ | |
901 | if (ret != 0) | |
902 | goto fail; | |
903 | ||
904 | return ret; | |
905 | ||
906 | fail: | |
907 | s->s_fs_info = NULL; | |
908 | client->sb = NULL; | |
909 | return ret; | |
910 | } | |
911 | ||
912 | /* | |
913 | * share superblock if same fs AND options | |
914 | */ | |
915 | static int ceph_compare_super(struct super_block *sb, void *data) | |
916 | { | |
917 | struct ceph_client *new = data; | |
6b805185 | 918 | struct ceph_mount_args *args = new->mount_args; |
16725b9d SW |
919 | struct ceph_client *other = ceph_sb_to_client(sb); |
920 | int i; | |
921 | ||
922 | dout("ceph_compare_super %p\n", sb); | |
923 | if (args->flags & CEPH_OPT_FSID) { | |
924 | if (ceph_fsid_compare(&args->fsid, &other->fsid)) { | |
925 | dout("fsid doesn't match\n"); | |
926 | return 0; | |
927 | } | |
928 | } else { | |
929 | /* do we share (a) monitor? */ | |
930 | for (i = 0; i < new->monc.monmap->num_mon; i++) | |
931 | if (ceph_monmap_contains(other->monc.monmap, | |
932 | &new->monc.monmap->mon_inst[i].addr)) | |
933 | break; | |
934 | if (i == new->monc.monmap->num_mon) { | |
935 | dout("mon ip not part of monmap\n"); | |
936 | return 0; | |
937 | } | |
938 | dout("mon ip matches existing sb %p\n", sb); | |
939 | } | |
6b805185 | 940 | if (args->sb_flags != other->mount_args->sb_flags) { |
16725b9d SW |
941 | dout("flags differ\n"); |
942 | return 0; | |
943 | } | |
944 | return 1; | |
945 | } | |
946 | ||
947 | /* | |
948 | * construct our own bdi so we can control readahead, etc. | |
949 | */ | |
00d5643e | 950 | static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); |
31e0cf8f | 951 | |
859e7b14 | 952 | static int ceph_register_bdi(struct super_block *sb, struct ceph_client *client) |
16725b9d SW |
953 | { |
954 | int err; | |
955 | ||
16725b9d | 956 | /* set ra_pages based on rsize mount option? */ |
6b805185 | 957 | if (client->mount_args->rsize >= PAGE_CACHE_SIZE) |
16725b9d | 958 | client->backing_dev_info.ra_pages = |
6b805185 | 959 | (client->mount_args->rsize + PAGE_CACHE_SIZE - 1) |
16725b9d | 960 | >> PAGE_SHIFT; |
31e0cf8f SW |
961 | err = bdi_register(&client->backing_dev_info, NULL, "ceph-%d", |
962 | atomic_long_inc_return(&bdi_seq)); | |
5dfc589a SW |
963 | if (!err) |
964 | sb->s_bdi = &client->backing_dev_info; | |
16725b9d SW |
965 | return err; |
966 | } | |
967 | ||
968 | static int ceph_get_sb(struct file_system_type *fs_type, | |
969 | int flags, const char *dev_name, void *data, | |
970 | struct vfsmount *mnt) | |
971 | { | |
972 | struct super_block *sb; | |
973 | struct ceph_client *client; | |
974 | int err; | |
975 | int (*compare_super)(struct super_block *, void *) = ceph_compare_super; | |
6a18be16 | 976 | const char *path = NULL; |
6b805185 | 977 | struct ceph_mount_args *args; |
16725b9d SW |
978 | |
979 | dout("ceph_get_sb\n"); | |
6b805185 SW |
980 | args = parse_mount_args(flags, data, dev_name, &path); |
981 | if (IS_ERR(args)) { | |
982 | err = PTR_ERR(args); | |
983 | goto out_final; | |
984 | } | |
16725b9d SW |
985 | |
986 | /* create client (which we may/may not use) */ | |
6b805185 SW |
987 | client = ceph_create_client(args); |
988 | if (IS_ERR(client)) { | |
989 | err = PTR_ERR(client); | |
990 | goto out_final; | |
991 | } | |
16725b9d | 992 | |
6b805185 | 993 | if (client->mount_args->flags & CEPH_OPT_NOSHARE) |
16725b9d SW |
994 | compare_super = NULL; |
995 | sb = sget(fs_type, compare_super, ceph_set_super, client); | |
996 | if (IS_ERR(sb)) { | |
997 | err = PTR_ERR(sb); | |
998 | goto out; | |
999 | } | |
1000 | ||
640ef79d | 1001 | if (ceph_sb_to_client(sb) != client) { |
16725b9d | 1002 | ceph_destroy_client(client); |
640ef79d | 1003 | client = ceph_sb_to_client(sb); |
16725b9d SW |
1004 | dout("get_sb got existing client %p\n", client); |
1005 | } else { | |
1006 | dout("get_sb using new client %p\n", client); | |
859e7b14 | 1007 | err = ceph_register_bdi(sb, client); |
16725b9d SW |
1008 | if (err < 0) |
1009 | goto out_splat; | |
1010 | } | |
1011 | ||
1012 | err = ceph_mount(client, mnt, path); | |
1013 | if (err < 0) | |
1014 | goto out_splat; | |
1015 | dout("root %p inode %p ino %llx.%llx\n", mnt->mnt_root, | |
1016 | mnt->mnt_root->d_inode, ceph_vinop(mnt->mnt_root->d_inode)); | |
1017 | return 0; | |
1018 | ||
1019 | out_splat: | |
1020 | ceph_mdsc_close_sessions(&client->mdsc); | |
3981f2e2 | 1021 | deactivate_locked_super(sb); |
16725b9d SW |
1022 | goto out_final; |
1023 | ||
1024 | out: | |
1025 | ceph_destroy_client(client); | |
1026 | out_final: | |
1027 | dout("ceph_get_sb fail %d\n", err); | |
1028 | return err; | |
1029 | } | |
1030 | ||
1031 | static void ceph_kill_sb(struct super_block *s) | |
1032 | { | |
1033 | struct ceph_client *client = ceph_sb_to_client(s); | |
1034 | dout("kill_sb %p\n", s); | |
1035 | ceph_mdsc_pre_umount(&client->mdsc); | |
16725b9d | 1036 | kill_anon_super(s); /* will call put_super after sb is r/o */ |
16725b9d SW |
1037 | ceph_destroy_client(client); |
1038 | } | |
1039 | ||
1040 | static struct file_system_type ceph_fs_type = { | |
1041 | .owner = THIS_MODULE, | |
1042 | .name = "ceph", | |
1043 | .get_sb = ceph_get_sb, | |
1044 | .kill_sb = ceph_kill_sb, | |
1045 | .fs_flags = FS_RENAME_DOES_D_MOVE, | |
1046 | }; | |
1047 | ||
1048 | #define _STRINGIFY(x) #x | |
1049 | #define STRINGIFY(x) _STRINGIFY(x) | |
1050 | ||
1051 | static int __init init_ceph(void) | |
1052 | { | |
1053 | int ret = 0; | |
1054 | ||
1055 | ret = ceph_debugfs_init(); | |
1056 | if (ret < 0) | |
1057 | goto out; | |
1058 | ||
1059 | ret = ceph_msgr_init(); | |
1060 | if (ret < 0) | |
1061 | goto out_debugfs; | |
1062 | ||
1063 | ret = init_caches(); | |
1064 | if (ret) | |
1065 | goto out_msgr; | |
1066 | ||
16725b9d SW |
1067 | ret = register_filesystem(&ceph_fs_type); |
1068 | if (ret) | |
1069 | goto out_icache; | |
1070 | ||
c8f16584 SW |
1071 | pr_info("loaded (mon/mds/osd proto %d/%d/%d, osdmap %d/%d %d/%d)\n", |
1072 | CEPH_MONC_PROTOCOL, CEPH_MDSC_PROTOCOL, CEPH_OSDC_PROTOCOL, | |
1073 | CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT, | |
1074 | CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT); | |
16725b9d SW |
1075 | return 0; |
1076 | ||
1077 | out_icache: | |
1078 | destroy_caches(); | |
1079 | out_msgr: | |
1080 | ceph_msgr_exit(); | |
1081 | out_debugfs: | |
1082 | ceph_debugfs_cleanup(); | |
1083 | out: | |
1084 | return ret; | |
1085 | } | |
1086 | ||
1087 | static void __exit exit_ceph(void) | |
1088 | { | |
1089 | dout("exit_ceph\n"); | |
1090 | unregister_filesystem(&ceph_fs_type); | |
16725b9d SW |
1091 | destroy_caches(); |
1092 | ceph_msgr_exit(); | |
1093 | ceph_debugfs_cleanup(); | |
1094 | } | |
1095 | ||
1096 | module_init(init_ceph); | |
1097 | module_exit(exit_ceph); | |
1098 | ||
1099 | MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); | |
1100 | MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); | |
1101 | MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); | |
1102 | MODULE_DESCRIPTION("Ceph filesystem for Linux"); | |
1103 | MODULE_LICENSE("GPL"); |