blob: 256f852219261e66984384fe19bb7182bf8dd50a [file] [log] [blame]
Sage Weil16725b92009-10-06 11:31:07 -07001
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07002#include <linux/ceph/ceph_debug.h>
Sage Weil16725b92009-10-06 11:31:07 -07003
4#include <linux/backing-dev.h>
Sage Weilc309f0a2010-06-30 21:34:01 -07005#include <linux/ctype.h>
Sage Weil16725b92009-10-06 11:31:07 -07006#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>
Sage Weil16725b92009-10-06 11:31:07 -070012#include <linux/sched.h>
13#include <linux/seq_file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Sage Weil16725b92009-10-06 11:31:07 -070015#include <linux/statfs.h>
16#include <linux/string.h>
Sage Weil16725b92009-10-06 11:31:07 -070017
Sage Weil16725b92009-10-06 11:31:07 -070018#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070019#include "mds_client.h"
20
21#include <linux/ceph/decode.h>
22#include <linux/ceph/mon_client.h>
23#include <linux/ceph/auth.h>
24#include <linux/ceph/debugfs.h>
Sage Weil16725b92009-10-06 11:31:07 -070025
26/*
27 * Ceph superblock operations
28 *
29 * Handle the basics of mounting, unmounting.
30 */
31
Sage Weil16725b92009-10-06 11:31:07 -070032/*
33 * super ops
34 */
35static void ceph_put_super(struct super_block *s)
36{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070037 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -070038
39 dout("put_super\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070040 ceph_mdsc_close_sessions(fsc->mdsc);
Sage Weil5dfc5892010-05-04 16:14:46 -070041
42 /*
43 * ensure we release the bdi before put_anon_super releases
44 * the device name.
45 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070046 if (s->s_bdi == &fsc->backing_dev_info) {
47 bdi_unregister(&fsc->backing_dev_info);
Sage Weil5dfc5892010-05-04 16:14:46 -070048 s->s_bdi = NULL;
49 }
50
Sage Weil16725b92009-10-06 11:31:07 -070051 return;
52}
53
54static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
55{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070056 struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode);
57 struct ceph_monmap *monmap = fsc->client->monc.monmap;
Sage Weil16725b92009-10-06 11:31:07 -070058 struct ceph_statfs st;
59 u64 fsid;
60 int err;
61
62 dout("statfs\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070063 err = ceph_monc_do_statfs(&fsc->client->monc, &st);
Sage Weil16725b92009-10-06 11:31:07 -070064 if (err < 0)
65 return err;
66
67 /* fill in kstatfs */
68 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
69
70 /*
71 * express utilization in terms of large blocks to avoid
72 * overflow on 32-bit machines.
73 */
74 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
75 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
Greg Farnum8f04d422011-07-26 11:26:54 -070076 buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
Sage Weil16725b92009-10-06 11:31:07 -070077 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
78
79 buf->f_files = le64_to_cpu(st.num_objects);
80 buf->f_ffree = -1;
Sage Weil558d3492010-06-01 12:51:12 -070081 buf->f_namelen = NAME_MAX;
Sage Weil16725b92009-10-06 11:31:07 -070082 buf->f_frsize = PAGE_CACHE_SIZE;
83
84 /* leave fsid little-endian, regardless of host endianness */
85 fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
86 buf->f_fsid.val[0] = fsid & 0xffffffff;
87 buf->f_fsid.val[1] = fsid >> 32;
88
89 return 0;
90}
91
92
Sage Weil2d9c98a2010-07-30 09:38:13 -070093static int ceph_sync_fs(struct super_block *sb, int wait)
Sage Weil16725b92009-10-06 11:31:07 -070094{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070095 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil2d9c98a2010-07-30 09:38:13 -070096
97 if (!wait) {
98 dout("sync_fs (non-blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070099 ceph_flush_dirty_caps(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700100 dout("sync_fs (non-blocking) done\n");
101 return 0;
102 }
103
104 dout("sync_fs (blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700105 ceph_osdc_sync(&fsc->client->osdc);
106 ceph_mdsc_sync(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700107 dout("sync_fs (blocking) done\n");
Sage Weil16725b92009-10-06 11:31:07 -0700108 return 0;
109}
110
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700111/*
112 * mount options
113 */
114enum {
115 Opt_wsize,
116 Opt_rsize,
Sage Weil83817e32011-08-04 08:03:44 -0700117 Opt_rasize,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700118 Opt_caps_wanted_delay_min,
119 Opt_caps_wanted_delay_max,
120 Opt_cap_release_safety,
121 Opt_readdir_max_entries,
122 Opt_readdir_max_bytes,
123 Opt_congestion_kb,
124 Opt_last_int,
125 /* int args above */
126 Opt_snapdirname,
127 Opt_last_string,
128 /* string args above */
129 Opt_dirstat,
130 Opt_nodirstat,
131 Opt_rbytes,
132 Opt_norbytes,
133 Opt_noasyncreaddir,
Sage Weila40dc6c2012-01-10 09:12:55 -0800134 Opt_dcache,
135 Opt_nodcache,
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800136 Opt_ino32,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700137};
138
139static match_table_t fsopt_tokens = {
140 {Opt_wsize, "wsize=%d"},
141 {Opt_rsize, "rsize=%d"},
Sage Weil83817e32011-08-04 08:03:44 -0700142 {Opt_rasize, "rasize=%d"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700143 {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
144 {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
145 {Opt_cap_release_safety, "cap_release_safety=%d"},
146 {Opt_readdir_max_entries, "readdir_max_entries=%d"},
147 {Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
148 {Opt_congestion_kb, "write_congestion_kb=%d"},
149 /* int args above */
150 {Opt_snapdirname, "snapdirname=%s"},
151 /* string args above */
152 {Opt_dirstat, "dirstat"},
153 {Opt_nodirstat, "nodirstat"},
154 {Opt_rbytes, "rbytes"},
155 {Opt_norbytes, "norbytes"},
156 {Opt_noasyncreaddir, "noasyncreaddir"},
Sage Weila40dc6c2012-01-10 09:12:55 -0800157 {Opt_dcache, "dcache"},
158 {Opt_nodcache, "nodcache"},
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800159 {Opt_ino32, "ino32"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700160 {-1, NULL}
161};
162
163static int parse_fsopt_token(char *c, void *private)
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800164{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700165 struct ceph_mount_options *fsopt = private;
166 substring_t argstr[MAX_OPT_ARGS];
167 int token, intval, ret;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800168
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700169 token = match_token((char *)c, fsopt_tokens, argstr);
170 if (token < 0)
171 return -EINVAL;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800172
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700173 if (token < Opt_last_int) {
174 ret = match_int(&argstr[0], &intval);
175 if (ret < 0) {
176 pr_err("bad mount option arg (not int) "
177 "at '%s'\n", c);
178 return ret;
179 }
180 dout("got int token %d val %d\n", token, intval);
181 } else if (token > Opt_last_int && token < Opt_last_string) {
182 dout("got string token %d val %s\n", token,
183 argstr[0].from);
184 } else {
185 dout("got token %d\n", token);
186 }
187
188 switch (token) {
189 case Opt_snapdirname:
190 kfree(fsopt->snapdir_name);
191 fsopt->snapdir_name = kstrndup(argstr[0].from,
192 argstr[0].to-argstr[0].from,
193 GFP_KERNEL);
194 if (!fsopt->snapdir_name)
195 return -ENOMEM;
196 break;
197
198 /* misc */
199 case Opt_wsize:
200 fsopt->wsize = intval;
201 break;
202 case Opt_rsize:
203 fsopt->rsize = intval;
204 break;
Sage Weil83817e32011-08-04 08:03:44 -0700205 case Opt_rasize:
206 fsopt->rasize = intval;
207 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700208 case Opt_caps_wanted_delay_min:
209 fsopt->caps_wanted_delay_min = intval;
210 break;
211 case Opt_caps_wanted_delay_max:
212 fsopt->caps_wanted_delay_max = intval;
213 break;
214 case Opt_readdir_max_entries:
215 fsopt->max_readdir = intval;
216 break;
217 case Opt_readdir_max_bytes:
218 fsopt->max_readdir_bytes = intval;
219 break;
220 case Opt_congestion_kb:
221 fsopt->congestion_kb = intval;
222 break;
223 case Opt_dirstat:
224 fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
225 break;
226 case Opt_nodirstat:
227 fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
228 break;
229 case Opt_rbytes:
230 fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
231 break;
232 case Opt_norbytes:
233 fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
234 break;
235 case Opt_noasyncreaddir:
236 fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
237 break;
Sage Weila40dc6c2012-01-10 09:12:55 -0800238 case Opt_dcache:
239 fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
240 break;
241 case Opt_nodcache:
242 fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
243 break;
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800244 case Opt_ino32:
245 fsopt->flags |= CEPH_MOUNT_OPT_INO32;
246 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700247 default:
248 BUG_ON(token);
249 }
250 return 0;
251}
252
253static void destroy_mount_options(struct ceph_mount_options *args)
254{
255 dout("destroy_mount_options %p\n", args);
256 kfree(args->snapdir_name);
257 kfree(args);
258}
259
260static int strcmp_null(const char *s1, const char *s2)
261{
262 if (!s1 && !s2)
263 return 0;
264 if (s1 && !s2)
265 return -1;
266 if (!s1 && s2)
267 return 1;
268 return strcmp(s1, s2);
269}
270
271static int compare_mount_options(struct ceph_mount_options *new_fsopt,
272 struct ceph_options *new_opt,
273 struct ceph_fs_client *fsc)
274{
275 struct ceph_mount_options *fsopt1 = new_fsopt;
276 struct ceph_mount_options *fsopt2 = fsc->mount_options;
277 int ofs = offsetof(struct ceph_mount_options, snapdir_name);
278 int ret;
279
280 ret = memcmp(fsopt1, fsopt2, ofs);
281 if (ret)
282 return ret;
283
284 ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
285 if (ret)
286 return ret;
287
288 return ceph_compare_options(new_opt, fsc->client);
289}
290
291static int parse_mount_options(struct ceph_mount_options **pfsopt,
292 struct ceph_options **popt,
293 int flags, char *options,
294 const char *dev_name,
295 const char **path)
296{
297 struct ceph_mount_options *fsopt;
298 const char *dev_name_end;
299 int err = -ENOMEM;
300
301 fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
302 if (!fsopt)
303 return -ENOMEM;
304
305 dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);
306
Noah Watkins80db8be2011-08-22 13:49:23 -0600307 fsopt->sb_flags = flags;
308 fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700309
Noah Watkins80db8be2011-08-22 13:49:23 -0600310 fsopt->rsize = CEPH_RSIZE_DEFAULT;
311 fsopt->rasize = CEPH_RASIZE_DEFAULT;
312 fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
Sage Weil50aac4f2011-01-18 07:59:40 -0800313 fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
314 fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
Noah Watkins80db8be2011-08-22 13:49:23 -0600315 fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT;
316 fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
317 fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
318 fsopt->congestion_kb = default_congestion_kb();
319
320 /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */
321 err = -EINVAL;
322 if (!dev_name)
323 goto out;
324 *path = strstr(dev_name, ":/");
325 if (*path == NULL) {
326 pr_err("device name is missing path (no :/ in %s)\n",
327 dev_name);
328 goto out;
329 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700330 dev_name_end = *path;
331 dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
332
333 /* path on server */
334 *path += 2;
335 dout("server path '%s'\n", *path);
336
337 err = ceph_parse_options(popt, options, dev_name, dev_name_end,
338 parse_fsopt_token, (void *)fsopt);
339 if (err)
340 goto out;
341
342 /* success */
343 *pfsopt = fsopt;
344 return 0;
345
346out:
347 destroy_mount_options(fsopt);
348 return err;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800349}
350
Sage Weil6e19a162010-04-29 16:38:32 -0700351/**
352 * ceph_show_options - Show mount options in /proc/mounts
353 * @m: seq_file to write to
Al Viro34c80b12011-12-08 21:32:45 -0500354 * @root: root of that (sub)tree
Sage Weil6e19a162010-04-29 16:38:32 -0700355 */
Al Viro34c80b12011-12-08 21:32:45 -0500356static int ceph_show_options(struct seq_file *m, struct dentry *root)
Sage Weil6e19a162010-04-29 16:38:32 -0700357{
Al Viro34c80b12011-12-08 21:32:45 -0500358 struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700359 struct ceph_mount_options *fsopt = fsc->mount_options;
360 struct ceph_options *opt = fsc->client->options;
Sage Weil6e19a162010-04-29 16:38:32 -0700361
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700362 if (opt->flags & CEPH_OPT_FSID)
363 seq_printf(m, ",fsid=%pU", &opt->fsid);
364 if (opt->flags & CEPH_OPT_NOSHARE)
Sage Weil6e19a162010-04-29 16:38:32 -0700365 seq_puts(m, ",noshare");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700366 if (opt->flags & CEPH_OPT_NOCRC)
Sage Weil6e19a162010-04-29 16:38:32 -0700367 seq_puts(m, ",nocrc");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700368
369 if (opt->name)
370 seq_printf(m, ",name=%s", opt->name);
Tommi Virtanen8323c3a2011-03-25 16:32:57 -0700371 if (opt->key)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700372 seq_puts(m, ",secret=<hidden>");
373
374 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
375 seq_printf(m, ",mount_timeout=%d", opt->mount_timeout);
376 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
377 seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl);
378 if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT)
379 seq_printf(m, ",osdtimeout=%d", opt->osd_timeout);
380 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
381 seq_printf(m, ",osdkeepalivetimeout=%d",
382 opt->osd_keepalive_timeout);
383
384 if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
385 seq_puts(m, ",dirstat");
386 if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0)
387 seq_puts(m, ",norbytes");
388 if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
Sage Weil6e19a162010-04-29 16:38:32 -0700389 seq_puts(m, ",noasyncreaddir");
Sage Weila40dc6c2012-01-10 09:12:55 -0800390 if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE)
391 seq_puts(m, ",dcache");
392 else
393 seq_puts(m, ",nodcache");
Sage Weil6e19a162010-04-29 16:38:32 -0700394
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700395 if (fsopt->wsize)
396 seq_printf(m, ",wsize=%d", fsopt->wsize);
Sage Weil80456f82011-03-10 13:33:26 -0800397 if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700398 seq_printf(m, ",rsize=%d", fsopt->rsize);
Sage Weil83817e32011-08-04 08:03:44 -0700399 if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
Sage Weil21519372011-12-01 08:06:52 -0800400 seq_printf(m, ",rasize=%d", fsopt->rasize);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700401 if (fsopt->congestion_kb != default_congestion_kb())
402 seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
403 if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700404 seq_printf(m, ",caps_wanted_delay_min=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700405 fsopt->caps_wanted_delay_min);
406 if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700407 seq_printf(m, ",caps_wanted_delay_max=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700408 fsopt->caps_wanted_delay_max);
409 if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700410 seq_printf(m, ",cap_release_safety=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700411 fsopt->cap_release_safety);
412 if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
413 seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
414 if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
415 seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
416 if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
417 seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name);
Sage Weil6e19a162010-04-29 16:38:32 -0700418 return 0;
419}
420
421/*
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700422 * handle any mon messages the standard library doesn't understand.
423 * return error if we don't either.
424 */
425static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
426{
427 struct ceph_fs_client *fsc = client->private;
428 int type = le16_to_cpu(msg->hdr.type);
429
430 switch (type) {
431 case CEPH_MSG_MDS_MAP:
432 ceph_mdsc_handle_map(fsc->mdsc, msg);
433 return 0;
434
435 default:
436 return -1;
437 }
438}
439
440/*
441 * create a new fs client
442 */
H Hartley Sweeten0c6d4b42011-09-23 11:53:30 -0700443static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700444 struct ceph_options *opt)
445{
446 struct ceph_fs_client *fsc;
Sage Weil6ab00d42011-08-09 09:41:59 -0700447 const unsigned supported_features =
448 CEPH_FEATURE_FLOCK |
449 CEPH_FEATURE_DIRLAYOUTHASH;
450 const unsigned required_features = 0;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700451 int err = -ENOMEM;
452
453 fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
454 if (!fsc)
455 return ERR_PTR(-ENOMEM);
456
Sage Weil6ab00d42011-08-09 09:41:59 -0700457 fsc->client = ceph_create_client(opt, fsc, supported_features,
458 required_features);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700459 if (IS_ERR(fsc->client)) {
460 err = PTR_ERR(fsc->client);
461 goto fail;
462 }
463 fsc->client->extra_mon_dispatch = extra_mon_dispatch;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700464 fsc->client->monc.want_mdsmap = 1;
465
466 fsc->mount_options = fsopt;
467
468 fsc->sb = NULL;
469 fsc->mount_state = CEPH_MOUNT_MOUNTING;
470
471 atomic_long_set(&fsc->writeback_count, 0);
472
473 err = bdi_init(&fsc->backing_dev_info);
474 if (err < 0)
475 goto fail_client;
476
477 err = -ENOMEM;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100478 /*
479 * The number of concurrent works can be high but they don't need
480 * to be processed in parallel, limit concurrency.
481 */
482 fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700483 if (fsc->wb_wq == NULL)
484 goto fail_bdi;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100485 fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700486 if (fsc->pg_inv_wq == NULL)
487 goto fail_wb_wq;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100488 fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700489 if (fsc->trunc_wq == NULL)
490 goto fail_pg_inv_wq;
491
492 /* set up mempools */
493 err = -ENOMEM;
494 fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
495 fsc->mount_options->wsize >> PAGE_CACHE_SHIFT);
496 if (!fsc->wb_pagevec_pool)
497 goto fail_trunc_wq;
498
499 /* caps */
500 fsc->min_caps = fsopt->max_readdir;
501
502 return fsc;
503
504fail_trunc_wq:
505 destroy_workqueue(fsc->trunc_wq);
506fail_pg_inv_wq:
507 destroy_workqueue(fsc->pg_inv_wq);
508fail_wb_wq:
509 destroy_workqueue(fsc->wb_wq);
510fail_bdi:
511 bdi_destroy(&fsc->backing_dev_info);
512fail_client:
513 ceph_destroy_client(fsc->client);
514fail:
515 kfree(fsc);
516 return ERR_PTR(err);
517}
518
H Hartley Sweeten0c6d4b42011-09-23 11:53:30 -0700519static void destroy_fs_client(struct ceph_fs_client *fsc)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700520{
521 dout("destroy_fs_client %p\n", fsc);
522
523 destroy_workqueue(fsc->wb_wq);
524 destroy_workqueue(fsc->pg_inv_wq);
525 destroy_workqueue(fsc->trunc_wq);
526
527 bdi_destroy(&fsc->backing_dev_info);
528
529 mempool_destroy(fsc->wb_pagevec_pool);
530
531 destroy_mount_options(fsc->mount_options);
532
533 ceph_fs_debugfs_cleanup(fsc);
534
535 ceph_destroy_client(fsc->client);
536
537 kfree(fsc);
538 dout("destroy_fs_client %p done\n", fsc);
539}
540
541/*
Sage Weil6e19a162010-04-29 16:38:32 -0700542 * caches
543 */
544struct kmem_cache *ceph_inode_cachep;
545struct kmem_cache *ceph_cap_cachep;
546struct kmem_cache *ceph_dentry_cachep;
547struct kmem_cache *ceph_file_cachep;
548
549static void ceph_inode_init_once(void *foo)
550{
551 struct ceph_inode_info *ci = foo;
552 inode_init_once(&ci->vfs_inode);
553}
554
Sage Weil16725b92009-10-06 11:31:07 -0700555static int __init init_caches(void)
556{
557 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
558 sizeof(struct ceph_inode_info),
559 __alignof__(struct ceph_inode_info),
560 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
561 ceph_inode_init_once);
562 if (ceph_inode_cachep == NULL)
563 return -ENOMEM;
564
565 ceph_cap_cachep = KMEM_CACHE(ceph_cap,
566 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
567 if (ceph_cap_cachep == NULL)
568 goto bad_cap;
569
570 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
571 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
572 if (ceph_dentry_cachep == NULL)
573 goto bad_dentry;
574
575 ceph_file_cachep = KMEM_CACHE(ceph_file_info,
576 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
577 if (ceph_file_cachep == NULL)
578 goto bad_file;
579
580 return 0;
581
582bad_file:
583 kmem_cache_destroy(ceph_dentry_cachep);
584bad_dentry:
585 kmem_cache_destroy(ceph_cap_cachep);
586bad_cap:
587 kmem_cache_destroy(ceph_inode_cachep);
588 return -ENOMEM;
589}
590
591static void destroy_caches(void)
592{
593 kmem_cache_destroy(ceph_inode_cachep);
594 kmem_cache_destroy(ceph_cap_cachep);
595 kmem_cache_destroy(ceph_dentry_cachep);
596 kmem_cache_destroy(ceph_file_cachep);
597}
598
599
600/*
601 * ceph_umount_begin - initiate forced umount. Tear down down the
602 * mount, skipping steps that may hang while waiting for server(s).
603 */
604static void ceph_umount_begin(struct super_block *sb)
605{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700606 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700607
608 dout("ceph_umount_begin - starting forced umount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700609 if (!fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700610 return;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700611 fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
Sage Weil16725b92009-10-06 11:31:07 -0700612 return;
613}
614
615static const struct super_operations ceph_super_ops = {
616 .alloc_inode = ceph_alloc_inode,
617 .destroy_inode = ceph_destroy_inode,
618 .write_inode = ceph_write_inode,
Sage Weil2d9c98a2010-07-30 09:38:13 -0700619 .sync_fs = ceph_sync_fs,
Sage Weil16725b92009-10-06 11:31:07 -0700620 .put_super = ceph_put_super,
621 .show_options = ceph_show_options,
622 .statfs = ceph_statfs,
623 .umount_begin = ceph_umount_begin,
624};
625
Sage Weil16725b92009-10-06 11:31:07 -0700626/*
627 * Bootstrap mount by opening the root directory. Note the mount
628 * @started time from caller, and time out if this takes too long.
629 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700630static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700631 const char *path,
632 unsigned long started)
633{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700634 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil16725b92009-10-06 11:31:07 -0700635 struct ceph_mds_request *req = NULL;
636 int err;
637 struct dentry *root;
638
639 /* open dir */
640 dout("open_root_inode opening '%s'\n", path);
641 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
642 if (IS_ERR(req))
Julia Lawall7e34bc52010-05-22 12:01:14 +0200643 return ERR_CAST(req);
Sage Weil16725b92009-10-06 11:31:07 -0700644 req->r_path1 = kstrdup(path, GFP_NOFS);
645 req->r_ino1.ino = CEPH_INO_ROOT;
646 req->r_ino1.snap = CEPH_NOSNAP;
647 req->r_started = started;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700648 req->r_timeout = fsc->client->options->mount_timeout * HZ;
Sage Weil16725b92009-10-06 11:31:07 -0700649 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
650 req->r_num_caps = 2;
651 err = ceph_mdsc_do_request(mdsc, NULL, req);
652 if (err == 0) {
Al Viro3c5184e2012-01-09 16:34:32 -0500653 struct inode *inode = req->r_target_inode;
654 req->r_target_inode = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700655 dout("open_root_inode success\n");
Al Viro3c5184e2012-01-09 16:34:32 -0500656 if (ceph_ino(inode) == CEPH_INO_ROOT &&
Sage Weil774ac212011-11-11 09:48:08 -0800657 fsc->sb->s_root == NULL) {
Al Viro48fde702012-01-08 22:15:13 -0500658 root = d_make_root(inode);
Al Viro3c5184e2012-01-09 16:34:32 -0500659 if (!root) {
Al Viro3c5184e2012-01-09 16:34:32 -0500660 root = ERR_PTR(-ENOMEM);
661 goto out;
662 }
Sage Weil774ac212011-11-11 09:48:08 -0800663 } else {
Al Viro3c5184e2012-01-09 16:34:32 -0500664 root = d_obtain_alias(inode);
Sage Weil774ac212011-11-11 09:48:08 -0800665 }
Linus Torvalds1a52bb02012-01-13 10:29:21 -0800666 ceph_init_dentry(root);
Sage Weil16725b92009-10-06 11:31:07 -0700667 dout("open_root_inode success, root dentry is %p\n", root);
668 } else {
669 root = ERR_PTR(err);
670 }
Al Viro3c5184e2012-01-09 16:34:32 -0500671out:
Sage Weil16725b92009-10-06 11:31:07 -0700672 ceph_mdsc_put_request(req);
673 return root;
674}
675
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700676
677
678
Sage Weil16725b92009-10-06 11:31:07 -0700679/*
680 * mount: join the ceph cluster, and open root directory.
681 */
Al Viroa7f9fb22010-07-26 16:17:55 +0400682static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700683 const char *path)
684{
Sage Weil16725b92009-10-06 11:31:07 -0700685 int err;
Sage Weil16725b92009-10-06 11:31:07 -0700686 unsigned long started = jiffies; /* note the start time */
687 struct dentry *root;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700688 int first = 0; /* first vfsmount for this super_block */
Sage Weil16725b92009-10-06 11:31:07 -0700689
690 dout("mount start\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700691 mutex_lock(&fsc->client->mount_mutex);
Sage Weil16725b92009-10-06 11:31:07 -0700692
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700693 err = __ceph_open_session(fsc->client, started);
Sage Weil16725b92009-10-06 11:31:07 -0700694 if (err < 0)
695 goto out;
696
Sage Weil16725b92009-10-06 11:31:07 -0700697 dout("mount opening root\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700698 root = open_root_dentry(fsc, "", started);
Sage Weil16725b92009-10-06 11:31:07 -0700699 if (IS_ERR(root)) {
700 err = PTR_ERR(root);
701 goto out;
702 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700703 if (fsc->sb->s_root) {
Sage Weil16725b92009-10-06 11:31:07 -0700704 dput(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700705 } else {
706 fsc->sb->s_root = root;
707 first = 1;
708
709 err = ceph_fs_debugfs_init(fsc);
710 if (err < 0)
711 goto fail;
712 }
Sage Weil16725b92009-10-06 11:31:07 -0700713
714 if (path[0] == 0) {
715 dget(root);
716 } else {
717 dout("mount opening base mountpoint\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700718 root = open_root_dentry(fsc, path, started);
Sage Weil16725b92009-10-06 11:31:07 -0700719 if (IS_ERR(root)) {
720 err = PTR_ERR(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700721 goto fail;
Sage Weil16725b92009-10-06 11:31:07 -0700722 }
723 }
724
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700725 fsc->mount_state = CEPH_MOUNT_MOUNTED;
Sage Weil16725b92009-10-06 11:31:07 -0700726 dout("mount success\n");
Al Viroa7f9fb22010-07-26 16:17:55 +0400727 mutex_unlock(&fsc->client->mount_mutex);
728 return root;
Sage Weil16725b92009-10-06 11:31:07 -0700729
730out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700731 mutex_unlock(&fsc->client->mount_mutex);
Al Viroa7f9fb22010-07-26 16:17:55 +0400732 return ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700733
734fail:
735 if (first) {
736 dput(fsc->sb->s_root);
737 fsc->sb->s_root = NULL;
738 }
739 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700740}
741
742static int ceph_set_super(struct super_block *s, void *data)
743{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700744 struct ceph_fs_client *fsc = data;
Sage Weil16725b92009-10-06 11:31:07 -0700745 int ret;
746
747 dout("set_super %p data %p\n", s, data);
748
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700749 s->s_flags = fsc->mount_options->sb_flags;
Sage Weil16725b92009-10-06 11:31:07 -0700750 s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
751
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700752 s->s_fs_info = fsc;
753 fsc->sb = s;
Sage Weil16725b92009-10-06 11:31:07 -0700754
755 s->s_op = &ceph_super_ops;
756 s->s_export_op = &ceph_export_ops;
757
758 s->s_time_gran = 1000; /* 1000 ns == 1 us */
759
760 ret = set_anon_super(s, NULL); /* what is that second arg for? */
761 if (ret != 0)
762 goto fail;
763
764 return ret;
765
766fail:
767 s->s_fs_info = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700768 fsc->sb = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700769 return ret;
770}
771
772/*
773 * share superblock if same fs AND options
774 */
775static int ceph_compare_super(struct super_block *sb, void *data)
776{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700777 struct ceph_fs_client *new = data;
778 struct ceph_mount_options *fsopt = new->mount_options;
779 struct ceph_options *opt = new->client->options;
780 struct ceph_fs_client *other = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700781
782 dout("ceph_compare_super %p\n", sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700783
784 if (compare_mount_options(fsopt, opt, other)) {
785 dout("monitor(s)/mount options don't match\n");
786 return 0;
Sage Weil16725b92009-10-06 11:31:07 -0700787 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700788 if ((opt->flags & CEPH_OPT_FSID) &&
789 ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
790 dout("fsid doesn't match\n");
791 return 0;
792 }
793 if (fsopt->sb_flags != other->mount_options->sb_flags) {
Sage Weil16725b92009-10-06 11:31:07 -0700794 dout("flags differ\n");
795 return 0;
796 }
797 return 1;
798}
799
800/*
801 * construct our own bdi so we can control readahead, etc.
802 */
Jeff Mahoney00d56432010-06-10 11:13:58 -0400803static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
Sage Weil31e0cf82010-05-04 16:39:35 -0700804
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700805static int ceph_register_bdi(struct super_block *sb,
806 struct ceph_fs_client *fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700807{
808 int err;
809
Sage Weil83817e32011-08-04 08:03:44 -0700810 /* set ra_pages based on rasize mount option? */
811 if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700812 fsc->backing_dev_info.ra_pages =
Sage Weil83817e32011-08-04 08:03:44 -0700813 (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1)
Sage Weil16725b92009-10-06 11:31:07 -0700814 >> PAGE_SHIFT;
Yehuda Sadehe9852222011-07-22 11:12:28 -0700815 else
816 fsc->backing_dev_info.ra_pages =
817 default_backing_dev_info.ra_pages;
818
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700819 err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
Sage Weil31e0cf82010-05-04 16:39:35 -0700820 atomic_long_inc_return(&bdi_seq));
Sage Weil5dfc5892010-05-04 16:14:46 -0700821 if (!err)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700822 sb->s_bdi = &fsc->backing_dev_info;
Sage Weil16725b92009-10-06 11:31:07 -0700823 return err;
824}
825
Al Viroa7f9fb22010-07-26 16:17:55 +0400826static struct dentry *ceph_mount(struct file_system_type *fs_type,
827 int flags, const char *dev_name, void *data)
Sage Weil16725b92009-10-06 11:31:07 -0700828{
829 struct super_block *sb;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700830 struct ceph_fs_client *fsc;
Al Viroa7f9fb22010-07-26 16:17:55 +0400831 struct dentry *res;
Sage Weil16725b92009-10-06 11:31:07 -0700832 int err;
833 int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
Sage Weil6a18be12009-11-04 11:40:05 -0800834 const char *path = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700835 struct ceph_mount_options *fsopt = NULL;
836 struct ceph_options *opt = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700837
Al Viroa7f9fb22010-07-26 16:17:55 +0400838 dout("ceph_mount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700839 err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path);
Al Viroa7f9fb22010-07-26 16:17:55 +0400840 if (err < 0) {
841 res = ERR_PTR(err);
Sage Weil6b805182009-10-27 11:50:50 -0700842 goto out_final;
Al Viroa7f9fb22010-07-26 16:17:55 +0400843 }
Sage Weil16725b92009-10-06 11:31:07 -0700844
845 /* create client (which we may/may not use) */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700846 fsc = create_fs_client(fsopt, opt);
847 if (IS_ERR(fsc)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400848 res = ERR_CAST(fsc);
Noah Watkins259a1872011-08-22 13:49:41 -0600849 destroy_mount_options(fsopt);
850 ceph_destroy_options(opt);
Sage Weil6b805182009-10-27 11:50:50 -0700851 goto out_final;
852 }
Sage Weil16725b92009-10-06 11:31:07 -0700853
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700854 err = ceph_mdsc_init(fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400855 if (err < 0) {
856 res = ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700857 goto out;
Al Viroa7f9fb22010-07-26 16:17:55 +0400858 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700859
860 if (ceph_test_opt(fsc->client, NOSHARE))
Sage Weil16725b92009-10-06 11:31:07 -0700861 compare_super = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700862 sb = sget(fs_type, compare_super, ceph_set_super, fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700863 if (IS_ERR(sb)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400864 res = ERR_CAST(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700865 goto out;
866 }
867
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700868 if (ceph_sb_to_client(sb) != fsc) {
869 ceph_mdsc_destroy(fsc);
870 destroy_fs_client(fsc);
871 fsc = ceph_sb_to_client(sb);
872 dout("get_sb got existing client %p\n", fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700873 } else {
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700874 dout("get_sb using new client %p\n", fsc);
875 err = ceph_register_bdi(sb, fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400876 if (err < 0) {
877 res = ERR_PTR(err);
Sage Weil16725b92009-10-06 11:31:07 -0700878 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400879 }
Sage Weil16725b92009-10-06 11:31:07 -0700880 }
881
Al Viroa7f9fb22010-07-26 16:17:55 +0400882 res = ceph_real_mount(fsc, path);
883 if (IS_ERR(res))
Sage Weil16725b92009-10-06 11:31:07 -0700884 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400885 dout("root %p inode %p ino %llx.%llx\n", res,
886 res->d_inode, ceph_vinop(res->d_inode));
887 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700888
889out_splat:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700890 ceph_mdsc_close_sessions(fsc->mdsc);
Al Viro3981f2e2010-03-21 19:22:29 -0400891 deactivate_locked_super(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700892 goto out_final;
893
894out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700895 ceph_mdsc_destroy(fsc);
896 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700897out_final:
Al Viroa7f9fb22010-07-26 16:17:55 +0400898 dout("ceph_mount fail %ld\n", PTR_ERR(res));
899 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700900}
901
902static void ceph_kill_sb(struct super_block *s)
903{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700904 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -0700905 dout("kill_sb %p\n", s);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700906 ceph_mdsc_pre_umount(fsc->mdsc);
Sage Weil16725b92009-10-06 11:31:07 -0700907 kill_anon_super(s); /* will call put_super after sb is r/o */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700908 ceph_mdsc_destroy(fsc);
909 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700910}
911
912static struct file_system_type ceph_fs_type = {
913 .owner = THIS_MODULE,
914 .name = "ceph",
Al Viroa7f9fb22010-07-26 16:17:55 +0400915 .mount = ceph_mount,
Sage Weil16725b92009-10-06 11:31:07 -0700916 .kill_sb = ceph_kill_sb,
917 .fs_flags = FS_RENAME_DOES_D_MOVE,
918};
919
920#define _STRINGIFY(x) #x
921#define STRINGIFY(x) _STRINGIFY(x)
922
923static int __init init_ceph(void)
924{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700925 int ret = init_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700926 if (ret)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700927 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700928
Sage Weil16725b92009-10-06 11:31:07 -0700929 ret = register_filesystem(&ceph_fs_type);
930 if (ret)
931 goto out_icache;
932
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700933 pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
934
Sage Weil16725b92009-10-06 11:31:07 -0700935 return 0;
936
937out_icache:
938 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700939out:
940 return ret;
941}
942
943static void __exit exit_ceph(void)
944{
945 dout("exit_ceph\n");
946 unregister_filesystem(&ceph_fs_type);
Sage Weil16725b92009-10-06 11:31:07 -0700947 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700948}
949
950module_init(init_ceph);
951module_exit(exit_ceph);
952
953MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
954MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
955MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
956MODULE_DESCRIPTION("Ceph filesystem for Linux");
957MODULE_LICENSE("GPL");