blob: 6ddc0bca56b2e61abda40b5ad8194be95f73c152 [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
Sage Weil1fe60e52012-07-30 16:23:22 -070021#include <linux/ceph/ceph_features.h>
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070022#include <linux/ceph/decode.h>
23#include <linux/ceph/mon_client.h>
24#include <linux/ceph/auth.h>
25#include <linux/ceph/debugfs.h>
Sage Weil16725b92009-10-06 11:31:07 -070026
27/*
28 * Ceph superblock operations
29 *
30 * Handle the basics of mounting, unmounting.
31 */
32
Sage Weil16725b92009-10-06 11:31:07 -070033/*
34 * super ops
35 */
36static void ceph_put_super(struct super_block *s)
37{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070038 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -070039
40 dout("put_super\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070041 ceph_mdsc_close_sessions(fsc->mdsc);
Sage Weil5dfc5892010-05-04 16:14:46 -070042
43 /*
44 * ensure we release the bdi before put_anon_super releases
45 * the device name.
46 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070047 if (s->s_bdi == &fsc->backing_dev_info) {
48 bdi_unregister(&fsc->backing_dev_info);
Sage Weil5dfc5892010-05-04 16:14:46 -070049 s->s_bdi = NULL;
50 }
51
Sage Weil16725b92009-10-06 11:31:07 -070052 return;
53}
54
55static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
56{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070057 struct ceph_fs_client *fsc = ceph_inode_to_client(dentry->d_inode);
58 struct ceph_monmap *monmap = fsc->client->monc.monmap;
Sage Weil16725b92009-10-06 11:31:07 -070059 struct ceph_statfs st;
60 u64 fsid;
61 int err;
62
63 dout("statfs\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070064 err = ceph_monc_do_statfs(&fsc->client->monc, &st);
Sage Weil16725b92009-10-06 11:31:07 -070065 if (err < 0)
66 return err;
67
68 /* fill in kstatfs */
69 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
70
71 /*
72 * express utilization in terms of large blocks to avoid
73 * overflow on 32-bit machines.
Sage Weil92a49fb2013-02-22 15:31:00 -080074 *
75 * NOTE: for the time being, we make bsize == frsize to humor
76 * not-yet-ancient versions of glibc that are broken.
77 * Someday, we will probably want to report a real block
78 * size... whatever that may mean for a network file system!
Sage Weil16725b92009-10-06 11:31:07 -070079 */
80 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
Sage Weil92a49fb2013-02-22 15:31:00 -080081 buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
Sage Weil16725b92009-10-06 11:31:07 -070082 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
Greg Farnum8f04d422011-07-26 11:26:54 -070083 buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
Sage Weil16725b92009-10-06 11:31:07 -070084 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
85
86 buf->f_files = le64_to_cpu(st.num_objects);
87 buf->f_ffree = -1;
Sage Weil558d3492010-06-01 12:51:12 -070088 buf->f_namelen = NAME_MAX;
Sage Weil16725b92009-10-06 11:31:07 -070089
90 /* leave fsid little-endian, regardless of host endianness */
91 fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
92 buf->f_fsid.val[0] = fsid & 0xffffffff;
93 buf->f_fsid.val[1] = fsid >> 32;
94
95 return 0;
96}
97
98
Sage Weil2d9c98a2010-07-30 09:38:13 -070099static int ceph_sync_fs(struct super_block *sb, int wait)
Sage Weil16725b92009-10-06 11:31:07 -0700100{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700101 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700102
103 if (!wait) {
104 dout("sync_fs (non-blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700105 ceph_flush_dirty_caps(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700106 dout("sync_fs (non-blocking) done\n");
107 return 0;
108 }
109
110 dout("sync_fs (blocking)\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700111 ceph_osdc_sync(&fsc->client->osdc);
112 ceph_mdsc_sync(fsc->mdsc);
Sage Weil2d9c98a2010-07-30 09:38:13 -0700113 dout("sync_fs (blocking) done\n");
Sage Weil16725b92009-10-06 11:31:07 -0700114 return 0;
115}
116
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700117/*
118 * mount options
119 */
120enum {
121 Opt_wsize,
122 Opt_rsize,
Sage Weil83817e32011-08-04 08:03:44 -0700123 Opt_rasize,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700124 Opt_caps_wanted_delay_min,
125 Opt_caps_wanted_delay_max,
126 Opt_cap_release_safety,
127 Opt_readdir_max_entries,
128 Opt_readdir_max_bytes,
129 Opt_congestion_kb,
130 Opt_last_int,
131 /* int args above */
132 Opt_snapdirname,
133 Opt_last_string,
134 /* string args above */
135 Opt_dirstat,
136 Opt_nodirstat,
137 Opt_rbytes,
138 Opt_norbytes,
Alex Eldercffaba12012-02-15 07:43:54 -0600139 Opt_asyncreaddir,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700140 Opt_noasyncreaddir,
Sage Weila40dc6c2012-01-10 09:12:55 -0800141 Opt_dcache,
142 Opt_nodcache,
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800143 Opt_ino32,
Alex Eldercffaba12012-02-15 07:43:54 -0600144 Opt_noino32,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700145};
146
147static match_table_t fsopt_tokens = {
148 {Opt_wsize, "wsize=%d"},
149 {Opt_rsize, "rsize=%d"},
Sage Weil83817e32011-08-04 08:03:44 -0700150 {Opt_rasize, "rasize=%d"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700151 {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
152 {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
153 {Opt_cap_release_safety, "cap_release_safety=%d"},
154 {Opt_readdir_max_entries, "readdir_max_entries=%d"},
155 {Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
156 {Opt_congestion_kb, "write_congestion_kb=%d"},
157 /* int args above */
158 {Opt_snapdirname, "snapdirname=%s"},
159 /* string args above */
160 {Opt_dirstat, "dirstat"},
161 {Opt_nodirstat, "nodirstat"},
162 {Opt_rbytes, "rbytes"},
163 {Opt_norbytes, "norbytes"},
Alex Eldercffaba12012-02-15 07:43:54 -0600164 {Opt_asyncreaddir, "asyncreaddir"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700165 {Opt_noasyncreaddir, "noasyncreaddir"},
Sage Weila40dc6c2012-01-10 09:12:55 -0800166 {Opt_dcache, "dcache"},
167 {Opt_nodcache, "nodcache"},
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800168 {Opt_ino32, "ino32"},
Alex Eldercffaba12012-02-15 07:43:54 -0600169 {Opt_noino32, "noino32"},
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700170 {-1, NULL}
171};
172
173static int parse_fsopt_token(char *c, void *private)
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800174{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700175 struct ceph_mount_options *fsopt = private;
176 substring_t argstr[MAX_OPT_ARGS];
177 int token, intval, ret;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800178
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700179 token = match_token((char *)c, fsopt_tokens, argstr);
180 if (token < 0)
181 return -EINVAL;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800182
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700183 if (token < Opt_last_int) {
184 ret = match_int(&argstr[0], &intval);
185 if (ret < 0) {
186 pr_err("bad mount option arg (not int) "
187 "at '%s'\n", c);
188 return ret;
189 }
190 dout("got int token %d val %d\n", token, intval);
191 } else if (token > Opt_last_int && token < Opt_last_string) {
192 dout("got string token %d val %s\n", token,
193 argstr[0].from);
194 } else {
195 dout("got token %d\n", token);
196 }
197
198 switch (token) {
199 case Opt_snapdirname:
200 kfree(fsopt->snapdir_name);
201 fsopt->snapdir_name = kstrndup(argstr[0].from,
202 argstr[0].to-argstr[0].from,
203 GFP_KERNEL);
204 if (!fsopt->snapdir_name)
205 return -ENOMEM;
206 break;
207
208 /* misc */
209 case Opt_wsize:
210 fsopt->wsize = intval;
211 break;
212 case Opt_rsize:
213 fsopt->rsize = intval;
214 break;
Sage Weil83817e32011-08-04 08:03:44 -0700215 case Opt_rasize:
216 fsopt->rasize = intval;
217 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700218 case Opt_caps_wanted_delay_min:
219 fsopt->caps_wanted_delay_min = intval;
220 break;
221 case Opt_caps_wanted_delay_max:
222 fsopt->caps_wanted_delay_max = intval;
223 break;
224 case Opt_readdir_max_entries:
225 fsopt->max_readdir = intval;
226 break;
227 case Opt_readdir_max_bytes:
228 fsopt->max_readdir_bytes = intval;
229 break;
230 case Opt_congestion_kb:
231 fsopt->congestion_kb = intval;
232 break;
233 case Opt_dirstat:
234 fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
235 break;
236 case Opt_nodirstat:
237 fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
238 break;
239 case Opt_rbytes:
240 fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
241 break;
242 case Opt_norbytes:
243 fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
244 break;
Alex Eldercffaba12012-02-15 07:43:54 -0600245 case Opt_asyncreaddir:
246 fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
247 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700248 case Opt_noasyncreaddir:
249 fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
250 break;
Sage Weila40dc6c2012-01-10 09:12:55 -0800251 case Opt_dcache:
252 fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
253 break;
254 case Opt_nodcache:
255 fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
256 break;
Yehuda Sadehad1fee92011-01-21 16:44:03 -0800257 case Opt_ino32:
258 fsopt->flags |= CEPH_MOUNT_OPT_INO32;
259 break;
Alex Eldercffaba12012-02-15 07:43:54 -0600260 case Opt_noino32:
261 fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
262 break;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700263 default:
264 BUG_ON(token);
265 }
266 return 0;
267}
268
269static void destroy_mount_options(struct ceph_mount_options *args)
270{
271 dout("destroy_mount_options %p\n", args);
272 kfree(args->snapdir_name);
273 kfree(args);
274}
275
276static int strcmp_null(const char *s1, const char *s2)
277{
278 if (!s1 && !s2)
279 return 0;
280 if (s1 && !s2)
281 return -1;
282 if (!s1 && s2)
283 return 1;
284 return strcmp(s1, s2);
285}
286
287static int compare_mount_options(struct ceph_mount_options *new_fsopt,
288 struct ceph_options *new_opt,
289 struct ceph_fs_client *fsc)
290{
291 struct ceph_mount_options *fsopt1 = new_fsopt;
292 struct ceph_mount_options *fsopt2 = fsc->mount_options;
293 int ofs = offsetof(struct ceph_mount_options, snapdir_name);
294 int ret;
295
296 ret = memcmp(fsopt1, fsopt2, ofs);
297 if (ret)
298 return ret;
299
300 ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
301 if (ret)
302 return ret;
303
304 return ceph_compare_options(new_opt, fsc->client);
305}
306
307static int parse_mount_options(struct ceph_mount_options **pfsopt,
308 struct ceph_options **popt,
309 int flags, char *options,
310 const char *dev_name,
311 const char **path)
312{
313 struct ceph_mount_options *fsopt;
314 const char *dev_name_end;
Alex Elderc98f5332012-08-09 10:33:26 -0700315 int err;
316
317 if (!dev_name || !*dev_name)
318 return -EINVAL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700319
320 fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
321 if (!fsopt)
322 return -ENOMEM;
323
324 dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);
325
Noah Watkins80db8be2011-08-22 13:49:23 -0600326 fsopt->sb_flags = flags;
327 fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700328
Noah Watkins80db8be2011-08-22 13:49:23 -0600329 fsopt->rsize = CEPH_RSIZE_DEFAULT;
330 fsopt->rasize = CEPH_RASIZE_DEFAULT;
331 fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
Sage Weil50aac4f2011-01-18 07:59:40 -0800332 fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
333 fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
Noah Watkins80db8be2011-08-22 13:49:23 -0600334 fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT;
335 fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
336 fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
337 fsopt->congestion_kb = default_congestion_kb();
338
Alex Elderc98f5332012-08-09 10:33:26 -0700339 /*
340 * Distinguish the server list from the path in "dev_name".
341 * Internally we do not include the leading '/' in the path.
342 *
343 * "dev_name" will look like:
344 * <server_spec>[,<server_spec>...]:[<path>]
345 * where
346 * <server_spec> is <ip>[:<port>]
347 * <path> is optional, but if present must begin with '/'
348 */
349 dev_name_end = strchr(dev_name, '/');
350 if (dev_name_end) {
351 /* skip over leading '/' for path */
352 *path = dev_name_end + 1;
353 } else {
354 /* path is empty */
355 dev_name_end = dev_name + strlen(dev_name);
356 *path = dev_name_end;
357 }
Noah Watkins80db8be2011-08-22 13:49:23 -0600358 err = -EINVAL;
Alex Elderc98f5332012-08-09 10:33:26 -0700359 dev_name_end--; /* back up to ':' separator */
360 if (*dev_name_end != ':') {
361 pr_err("device name is missing path (no : separator in %s)\n",
Noah Watkins80db8be2011-08-22 13:49:23 -0600362 dev_name);
363 goto out;
364 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700365 dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700366 dout("server path '%s'\n", *path);
367
Alex Elderee577412012-01-24 10:08:36 -0600368 *popt = ceph_parse_options(options, dev_name, dev_name_end,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700369 parse_fsopt_token, (void *)fsopt);
Alex Elderee577412012-01-24 10:08:36 -0600370 if (IS_ERR(*popt)) {
371 err = PTR_ERR(*popt);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700372 goto out;
Alex Elderee577412012-01-24 10:08:36 -0600373 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700374
375 /* success */
376 *pfsopt = fsopt;
377 return 0;
378
379out:
380 destroy_mount_options(fsopt);
381 return err;
Yehuda Sadeh2baba252009-12-18 13:51:57 -0800382}
383
Sage Weil6e19a162010-04-29 16:38:32 -0700384/**
385 * ceph_show_options - Show mount options in /proc/mounts
386 * @m: seq_file to write to
Al Viro34c80b12011-12-08 21:32:45 -0500387 * @root: root of that (sub)tree
Sage Weil6e19a162010-04-29 16:38:32 -0700388 */
Al Viro34c80b12011-12-08 21:32:45 -0500389static int ceph_show_options(struct seq_file *m, struct dentry *root)
Sage Weil6e19a162010-04-29 16:38:32 -0700390{
Al Viro34c80b12011-12-08 21:32:45 -0500391 struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700392 struct ceph_mount_options *fsopt = fsc->mount_options;
393 struct ceph_options *opt = fsc->client->options;
Sage Weil6e19a162010-04-29 16:38:32 -0700394
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700395 if (opt->flags & CEPH_OPT_FSID)
396 seq_printf(m, ",fsid=%pU", &opt->fsid);
397 if (opt->flags & CEPH_OPT_NOSHARE)
Sage Weil6e19a162010-04-29 16:38:32 -0700398 seq_puts(m, ",noshare");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700399 if (opt->flags & CEPH_OPT_NOCRC)
Sage Weil6e19a162010-04-29 16:38:32 -0700400 seq_puts(m, ",nocrc");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700401
402 if (opt->name)
403 seq_printf(m, ",name=%s", opt->name);
Tommi Virtanen8323c3a2011-03-25 16:32:57 -0700404 if (opt->key)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700405 seq_puts(m, ",secret=<hidden>");
406
407 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
408 seq_printf(m, ",mount_timeout=%d", opt->mount_timeout);
409 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
410 seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700411 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
412 seq_printf(m, ",osdkeepalivetimeout=%d",
413 opt->osd_keepalive_timeout);
414
415 if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
416 seq_puts(m, ",dirstat");
417 if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES) == 0)
418 seq_puts(m, ",norbytes");
419 if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
Sage Weil6e19a162010-04-29 16:38:32 -0700420 seq_puts(m, ",noasyncreaddir");
Sage Weila40dc6c2012-01-10 09:12:55 -0800421 if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE)
422 seq_puts(m, ",dcache");
423 else
424 seq_puts(m, ",nodcache");
Sage Weil6e19a162010-04-29 16:38:32 -0700425
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700426 if (fsopt->wsize)
427 seq_printf(m, ",wsize=%d", fsopt->wsize);
Sage Weil80456f82011-03-10 13:33:26 -0800428 if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700429 seq_printf(m, ",rsize=%d", fsopt->rsize);
Sage Weil83817e32011-08-04 08:03:44 -0700430 if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
Sage Weil21519372011-12-01 08:06:52 -0800431 seq_printf(m, ",rasize=%d", fsopt->rasize);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700432 if (fsopt->congestion_kb != default_congestion_kb())
433 seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
434 if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700435 seq_printf(m, ",caps_wanted_delay_min=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700436 fsopt->caps_wanted_delay_min);
437 if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700438 seq_printf(m, ",caps_wanted_delay_max=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700439 fsopt->caps_wanted_delay_max);
440 if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT)
Sage Weil6e19a162010-04-29 16:38:32 -0700441 seq_printf(m, ",cap_release_safety=%d",
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700442 fsopt->cap_release_safety);
443 if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
444 seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
445 if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
446 seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
447 if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
448 seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name);
Sage Weil6e19a162010-04-29 16:38:32 -0700449 return 0;
450}
451
452/*
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700453 * handle any mon messages the standard library doesn't understand.
454 * return error if we don't either.
455 */
456static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
457{
458 struct ceph_fs_client *fsc = client->private;
459 int type = le16_to_cpu(msg->hdr.type);
460
461 switch (type) {
462 case CEPH_MSG_MDS_MAP:
463 ceph_mdsc_handle_map(fsc->mdsc, msg);
464 return 0;
465
466 default:
467 return -1;
468 }
469}
470
471/*
472 * create a new fs client
473 */
H Hartley Sweeten0c6d4b4e22011-09-23 11:53:30 -0700474static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700475 struct ceph_options *opt)
476{
477 struct ceph_fs_client *fsc;
Sage Weil6ab00d42011-08-09 09:41:59 -0700478 const unsigned supported_features =
479 CEPH_FEATURE_FLOCK |
480 CEPH_FEATURE_DIRLAYOUTHASH;
481 const unsigned required_features = 0;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700482 int err = -ENOMEM;
483
484 fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
485 if (!fsc)
486 return ERR_PTR(-ENOMEM);
487
Sage Weil6ab00d42011-08-09 09:41:59 -0700488 fsc->client = ceph_create_client(opt, fsc, supported_features,
489 required_features);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700490 if (IS_ERR(fsc->client)) {
491 err = PTR_ERR(fsc->client);
492 goto fail;
493 }
494 fsc->client->extra_mon_dispatch = extra_mon_dispatch;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700495 fsc->client->monc.want_mdsmap = 1;
496
497 fsc->mount_options = fsopt;
498
499 fsc->sb = NULL;
500 fsc->mount_state = CEPH_MOUNT_MOUNTING;
501
502 atomic_long_set(&fsc->writeback_count, 0);
503
504 err = bdi_init(&fsc->backing_dev_info);
505 if (err < 0)
506 goto fail_client;
507
508 err = -ENOMEM;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100509 /*
510 * The number of concurrent works can be high but they don't need
511 * to be processed in parallel, limit concurrency.
512 */
513 fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700514 if (fsc->wb_wq == NULL)
515 goto fail_bdi;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100516 fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700517 if (fsc->pg_inv_wq == NULL)
518 goto fail_wb_wq;
Tejun Heo01e6acc2011-01-03 14:49:45 +0100519 fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700520 if (fsc->trunc_wq == NULL)
521 goto fail_pg_inv_wq;
522
523 /* set up mempools */
524 err = -ENOMEM;
525 fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
526 fsc->mount_options->wsize >> PAGE_CACHE_SHIFT);
527 if (!fsc->wb_pagevec_pool)
528 goto fail_trunc_wq;
529
530 /* caps */
531 fsc->min_caps = fsopt->max_readdir;
532
533 return fsc;
534
535fail_trunc_wq:
536 destroy_workqueue(fsc->trunc_wq);
537fail_pg_inv_wq:
538 destroy_workqueue(fsc->pg_inv_wq);
539fail_wb_wq:
540 destroy_workqueue(fsc->wb_wq);
541fail_bdi:
542 bdi_destroy(&fsc->backing_dev_info);
543fail_client:
544 ceph_destroy_client(fsc->client);
545fail:
546 kfree(fsc);
547 return ERR_PTR(err);
548}
549
H Hartley Sweeten0c6d4b4e22011-09-23 11:53:30 -0700550static void destroy_fs_client(struct ceph_fs_client *fsc)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700551{
552 dout("destroy_fs_client %p\n", fsc);
553
554 destroy_workqueue(fsc->wb_wq);
555 destroy_workqueue(fsc->pg_inv_wq);
556 destroy_workqueue(fsc->trunc_wq);
557
558 bdi_destroy(&fsc->backing_dev_info);
559
560 mempool_destroy(fsc->wb_pagevec_pool);
561
562 destroy_mount_options(fsc->mount_options);
563
564 ceph_fs_debugfs_cleanup(fsc);
565
566 ceph_destroy_client(fsc->client);
567
568 kfree(fsc);
569 dout("destroy_fs_client %p done\n", fsc);
570}
571
572/*
Sage Weil6e19a162010-04-29 16:38:32 -0700573 * caches
574 */
575struct kmem_cache *ceph_inode_cachep;
576struct kmem_cache *ceph_cap_cachep;
577struct kmem_cache *ceph_dentry_cachep;
578struct kmem_cache *ceph_file_cachep;
579
580static void ceph_inode_init_once(void *foo)
581{
582 struct ceph_inode_info *ci = foo;
583 inode_init_once(&ci->vfs_inode);
584}
585
Sage Weil16725b92009-10-06 11:31:07 -0700586static int __init init_caches(void)
587{
588 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
589 sizeof(struct ceph_inode_info),
590 __alignof__(struct ceph_inode_info),
591 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
592 ceph_inode_init_once);
593 if (ceph_inode_cachep == NULL)
594 return -ENOMEM;
595
596 ceph_cap_cachep = KMEM_CACHE(ceph_cap,
597 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
598 if (ceph_cap_cachep == NULL)
599 goto bad_cap;
600
601 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
602 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
603 if (ceph_dentry_cachep == NULL)
604 goto bad_dentry;
605
606 ceph_file_cachep = KMEM_CACHE(ceph_file_info,
607 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
608 if (ceph_file_cachep == NULL)
609 goto bad_file;
610
611 return 0;
612
613bad_file:
614 kmem_cache_destroy(ceph_dentry_cachep);
615bad_dentry:
616 kmem_cache_destroy(ceph_cap_cachep);
617bad_cap:
618 kmem_cache_destroy(ceph_inode_cachep);
619 return -ENOMEM;
620}
621
622static void destroy_caches(void)
623{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000624 /*
625 * Make sure all delayed rcu free inodes are flushed before we
626 * destroy cache.
627 */
628 rcu_barrier();
Sage Weil16725b92009-10-06 11:31:07 -0700629 kmem_cache_destroy(ceph_inode_cachep);
630 kmem_cache_destroy(ceph_cap_cachep);
631 kmem_cache_destroy(ceph_dentry_cachep);
632 kmem_cache_destroy(ceph_file_cachep);
633}
634
635
636/*
637 * ceph_umount_begin - initiate forced umount. Tear down down the
638 * mount, skipping steps that may hang while waiting for server(s).
639 */
640static void ceph_umount_begin(struct super_block *sb)
641{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700642 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700643
644 dout("ceph_umount_begin - starting forced umount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700645 if (!fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700646 return;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700647 fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
Sage Weil16725b92009-10-06 11:31:07 -0700648 return;
649}
650
651static const struct super_operations ceph_super_ops = {
652 .alloc_inode = ceph_alloc_inode,
653 .destroy_inode = ceph_destroy_inode,
654 .write_inode = ceph_write_inode,
Sage Weil2d9c98a2010-07-30 09:38:13 -0700655 .sync_fs = ceph_sync_fs,
Sage Weil16725b92009-10-06 11:31:07 -0700656 .put_super = ceph_put_super,
657 .show_options = ceph_show_options,
658 .statfs = ceph_statfs,
659 .umount_begin = ceph_umount_begin,
660};
661
Sage Weil16725b92009-10-06 11:31:07 -0700662/*
663 * Bootstrap mount by opening the root directory. Note the mount
664 * @started time from caller, and time out if this takes too long.
665 */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700666static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700667 const char *path,
668 unsigned long started)
669{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700670 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil16725b92009-10-06 11:31:07 -0700671 struct ceph_mds_request *req = NULL;
672 int err;
673 struct dentry *root;
674
675 /* open dir */
676 dout("open_root_inode opening '%s'\n", path);
677 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
678 if (IS_ERR(req))
Julia Lawall7e34bc52010-05-22 12:01:14 +0200679 return ERR_CAST(req);
Sage Weil16725b92009-10-06 11:31:07 -0700680 req->r_path1 = kstrdup(path, GFP_NOFS);
681 req->r_ino1.ino = CEPH_INO_ROOT;
682 req->r_ino1.snap = CEPH_NOSNAP;
683 req->r_started = started;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700684 req->r_timeout = fsc->client->options->mount_timeout * HZ;
Sage Weil16725b92009-10-06 11:31:07 -0700685 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
686 req->r_num_caps = 2;
687 err = ceph_mdsc_do_request(mdsc, NULL, req);
688 if (err == 0) {
Al Viro3c5184e2012-01-09 16:34:32 -0500689 struct inode *inode = req->r_target_inode;
690 req->r_target_inode = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700691 dout("open_root_inode success\n");
Al Viro3c5184e2012-01-09 16:34:32 -0500692 if (ceph_ino(inode) == CEPH_INO_ROOT &&
Sage Weil774ac212011-11-11 09:48:08 -0800693 fsc->sb->s_root == NULL) {
Al Viro48fde702012-01-08 22:15:13 -0500694 root = d_make_root(inode);
Al Viro3c5184e2012-01-09 16:34:32 -0500695 if (!root) {
Al Viro3c5184e2012-01-09 16:34:32 -0500696 root = ERR_PTR(-ENOMEM);
697 goto out;
698 }
Sage Weil774ac212011-11-11 09:48:08 -0800699 } else {
Al Viro3c5184e2012-01-09 16:34:32 -0500700 root = d_obtain_alias(inode);
Sage Weil774ac212011-11-11 09:48:08 -0800701 }
Linus Torvalds1a52bb02012-01-13 10:29:21 -0800702 ceph_init_dentry(root);
Sage Weil16725b92009-10-06 11:31:07 -0700703 dout("open_root_inode success, root dentry is %p\n", root);
704 } else {
705 root = ERR_PTR(err);
706 }
Al Viro3c5184e2012-01-09 16:34:32 -0500707out:
Sage Weil16725b92009-10-06 11:31:07 -0700708 ceph_mdsc_put_request(req);
709 return root;
710}
711
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700712
713
714
Sage Weil16725b92009-10-06 11:31:07 -0700715/*
716 * mount: join the ceph cluster, and open root directory.
717 */
Al Viroa7f9fb22010-07-26 16:17:55 +0400718static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
Sage Weil16725b92009-10-06 11:31:07 -0700719 const char *path)
720{
Sage Weil16725b92009-10-06 11:31:07 -0700721 int err;
Sage Weil16725b92009-10-06 11:31:07 -0700722 unsigned long started = jiffies; /* note the start time */
723 struct dentry *root;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700724 int first = 0; /* first vfsmount for this super_block */
Sage Weil16725b92009-10-06 11:31:07 -0700725
726 dout("mount start\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700727 mutex_lock(&fsc->client->mount_mutex);
Sage Weil16725b92009-10-06 11:31:07 -0700728
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700729 err = __ceph_open_session(fsc->client, started);
Sage Weil16725b92009-10-06 11:31:07 -0700730 if (err < 0)
731 goto out;
732
Sage Weil16725b92009-10-06 11:31:07 -0700733 dout("mount opening root\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700734 root = open_root_dentry(fsc, "", started);
Sage Weil16725b92009-10-06 11:31:07 -0700735 if (IS_ERR(root)) {
736 err = PTR_ERR(root);
737 goto out;
738 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700739 if (fsc->sb->s_root) {
Sage Weil16725b92009-10-06 11:31:07 -0700740 dput(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700741 } else {
742 fsc->sb->s_root = root;
743 first = 1;
744
745 err = ceph_fs_debugfs_init(fsc);
746 if (err < 0)
747 goto fail;
748 }
Sage Weil16725b92009-10-06 11:31:07 -0700749
750 if (path[0] == 0) {
751 dget(root);
752 } else {
753 dout("mount opening base mountpoint\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700754 root = open_root_dentry(fsc, path, started);
Sage Weil16725b92009-10-06 11:31:07 -0700755 if (IS_ERR(root)) {
756 err = PTR_ERR(root);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700757 goto fail;
Sage Weil16725b92009-10-06 11:31:07 -0700758 }
759 }
760
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700761 fsc->mount_state = CEPH_MOUNT_MOUNTED;
Sage Weil16725b92009-10-06 11:31:07 -0700762 dout("mount success\n");
Al Viroa7f9fb22010-07-26 16:17:55 +0400763 mutex_unlock(&fsc->client->mount_mutex);
764 return root;
Sage Weil16725b92009-10-06 11:31:07 -0700765
766out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700767 mutex_unlock(&fsc->client->mount_mutex);
Al Viroa7f9fb22010-07-26 16:17:55 +0400768 return ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700769
770fail:
771 if (first) {
772 dput(fsc->sb->s_root);
773 fsc->sb->s_root = NULL;
774 }
775 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700776}
777
778static int ceph_set_super(struct super_block *s, void *data)
779{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700780 struct ceph_fs_client *fsc = data;
Sage Weil16725b92009-10-06 11:31:07 -0700781 int ret;
782
783 dout("set_super %p data %p\n", s, data);
784
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700785 s->s_flags = fsc->mount_options->sb_flags;
Sage Weil16725b92009-10-06 11:31:07 -0700786 s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
787
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700788 s->s_fs_info = fsc;
789 fsc->sb = s;
Sage Weil16725b92009-10-06 11:31:07 -0700790
791 s->s_op = &ceph_super_ops;
792 s->s_export_op = &ceph_export_ops;
793
794 s->s_time_gran = 1000; /* 1000 ns == 1 us */
795
796 ret = set_anon_super(s, NULL); /* what is that second arg for? */
797 if (ret != 0)
798 goto fail;
799
800 return ret;
801
802fail:
803 s->s_fs_info = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700804 fsc->sb = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700805 return ret;
806}
807
808/*
809 * share superblock if same fs AND options
810 */
811static int ceph_compare_super(struct super_block *sb, void *data)
812{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700813 struct ceph_fs_client *new = data;
814 struct ceph_mount_options *fsopt = new->mount_options;
815 struct ceph_options *opt = new->client->options;
816 struct ceph_fs_client *other = ceph_sb_to_client(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700817
818 dout("ceph_compare_super %p\n", sb);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700819
820 if (compare_mount_options(fsopt, opt, other)) {
821 dout("monitor(s)/mount options don't match\n");
822 return 0;
Sage Weil16725b92009-10-06 11:31:07 -0700823 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700824 if ((opt->flags & CEPH_OPT_FSID) &&
825 ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
826 dout("fsid doesn't match\n");
827 return 0;
828 }
829 if (fsopt->sb_flags != other->mount_options->sb_flags) {
Sage Weil16725b92009-10-06 11:31:07 -0700830 dout("flags differ\n");
831 return 0;
832 }
833 return 1;
834}
835
836/*
837 * construct our own bdi so we can control readahead, etc.
838 */
Jeff Mahoney00d56432010-06-10 11:13:58 -0400839static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
Sage Weil31e0cf82010-05-04 16:39:35 -0700840
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700841static int ceph_register_bdi(struct super_block *sb,
842 struct ceph_fs_client *fsc)
Sage Weil16725b92009-10-06 11:31:07 -0700843{
844 int err;
845
Sage Weil83817e32011-08-04 08:03:44 -0700846 /* set ra_pages based on rasize mount option? */
847 if (fsc->mount_options->rasize >= PAGE_CACHE_SIZE)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700848 fsc->backing_dev_info.ra_pages =
Sage Weil83817e32011-08-04 08:03:44 -0700849 (fsc->mount_options->rasize + PAGE_CACHE_SIZE - 1)
Sage Weil16725b92009-10-06 11:31:07 -0700850 >> PAGE_SHIFT;
Yehuda Sadehe9852222011-07-22 11:12:28 -0700851 else
852 fsc->backing_dev_info.ra_pages =
853 default_backing_dev_info.ra_pages;
854
Joe Perchesd2cc4dd2012-11-29 08:37:03 -0600855 err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld",
Sage Weil31e0cf82010-05-04 16:39:35 -0700856 atomic_long_inc_return(&bdi_seq));
Sage Weil5dfc5892010-05-04 16:14:46 -0700857 if (!err)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700858 sb->s_bdi = &fsc->backing_dev_info;
Sage Weil16725b92009-10-06 11:31:07 -0700859 return err;
860}
861
Al Viroa7f9fb22010-07-26 16:17:55 +0400862static struct dentry *ceph_mount(struct file_system_type *fs_type,
863 int flags, const char *dev_name, void *data)
Sage Weil16725b92009-10-06 11:31:07 -0700864{
865 struct super_block *sb;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700866 struct ceph_fs_client *fsc;
Al Viroa7f9fb22010-07-26 16:17:55 +0400867 struct dentry *res;
Sage Weil16725b92009-10-06 11:31:07 -0700868 int err;
869 int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
Sage Weil6a18be12009-11-04 11:40:05 -0800870 const char *path = NULL;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700871 struct ceph_mount_options *fsopt = NULL;
872 struct ceph_options *opt = NULL;
Sage Weil16725b92009-10-06 11:31:07 -0700873
Al Viroa7f9fb22010-07-26 16:17:55 +0400874 dout("ceph_mount\n");
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700875 err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path);
Al Viroa7f9fb22010-07-26 16:17:55 +0400876 if (err < 0) {
877 res = ERR_PTR(err);
Sage Weil6b805182009-10-27 11:50:50 -0700878 goto out_final;
Al Viroa7f9fb22010-07-26 16:17:55 +0400879 }
Sage Weil16725b92009-10-06 11:31:07 -0700880
881 /* create client (which we may/may not use) */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700882 fsc = create_fs_client(fsopt, opt);
883 if (IS_ERR(fsc)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400884 res = ERR_CAST(fsc);
Noah Watkins259a1872011-08-22 13:49:41 -0600885 destroy_mount_options(fsopt);
886 ceph_destroy_options(opt);
Sage Weil6b805182009-10-27 11:50:50 -0700887 goto out_final;
888 }
Sage Weil16725b92009-10-06 11:31:07 -0700889
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700890 err = ceph_mdsc_init(fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400891 if (err < 0) {
892 res = ERR_PTR(err);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700893 goto out;
Al Viroa7f9fb22010-07-26 16:17:55 +0400894 }
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700895
896 if (ceph_test_opt(fsc->client, NOSHARE))
Sage Weil16725b92009-10-06 11:31:07 -0700897 compare_super = NULL;
David Howells9249e172012-06-25 12:55:37 +0100898 sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700899 if (IS_ERR(sb)) {
Al Viroa7f9fb22010-07-26 16:17:55 +0400900 res = ERR_CAST(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700901 goto out;
902 }
903
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700904 if (ceph_sb_to_client(sb) != fsc) {
905 ceph_mdsc_destroy(fsc);
906 destroy_fs_client(fsc);
907 fsc = ceph_sb_to_client(sb);
908 dout("get_sb got existing client %p\n", fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700909 } else {
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700910 dout("get_sb using new client %p\n", fsc);
911 err = ceph_register_bdi(sb, fsc);
Al Viroa7f9fb22010-07-26 16:17:55 +0400912 if (err < 0) {
913 res = ERR_PTR(err);
Sage Weil16725b92009-10-06 11:31:07 -0700914 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400915 }
Sage Weil16725b92009-10-06 11:31:07 -0700916 }
917
Al Viroa7f9fb22010-07-26 16:17:55 +0400918 res = ceph_real_mount(fsc, path);
919 if (IS_ERR(res))
Sage Weil16725b92009-10-06 11:31:07 -0700920 goto out_splat;
Al Viroa7f9fb22010-07-26 16:17:55 +0400921 dout("root %p inode %p ino %llx.%llx\n", res,
922 res->d_inode, ceph_vinop(res->d_inode));
923 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700924
925out_splat:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700926 ceph_mdsc_close_sessions(fsc->mdsc);
Al Viro3981f2e2010-03-21 19:22:29 -0400927 deactivate_locked_super(sb);
Sage Weil16725b92009-10-06 11:31:07 -0700928 goto out_final;
929
930out:
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700931 ceph_mdsc_destroy(fsc);
932 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700933out_final:
Al Viroa7f9fb22010-07-26 16:17:55 +0400934 dout("ceph_mount fail %ld\n", PTR_ERR(res));
935 return res;
Sage Weil16725b92009-10-06 11:31:07 -0700936}
937
938static void ceph_kill_sb(struct super_block *s)
939{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700940 struct ceph_fs_client *fsc = ceph_sb_to_client(s);
Sage Weil16725b92009-10-06 11:31:07 -0700941 dout("kill_sb %p\n", s);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700942 ceph_mdsc_pre_umount(fsc->mdsc);
Sage Weil16725b92009-10-06 11:31:07 -0700943 kill_anon_super(s); /* will call put_super after sb is r/o */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700944 ceph_mdsc_destroy(fsc);
945 destroy_fs_client(fsc);
Sage Weil16725b92009-10-06 11:31:07 -0700946}
947
948static struct file_system_type ceph_fs_type = {
949 .owner = THIS_MODULE,
950 .name = "ceph",
Al Viroa7f9fb22010-07-26 16:17:55 +0400951 .mount = ceph_mount,
Sage Weil16725b92009-10-06 11:31:07 -0700952 .kill_sb = ceph_kill_sb,
953 .fs_flags = FS_RENAME_DOES_D_MOVE,
954};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800955MODULE_ALIAS_FS("ceph");
Sage Weil16725b92009-10-06 11:31:07 -0700956
957#define _STRINGIFY(x) #x
958#define STRINGIFY(x) _STRINGIFY(x)
959
960static int __init init_ceph(void)
961{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700962 int ret = init_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700963 if (ret)
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700964 goto out;
Sage Weil16725b92009-10-06 11:31:07 -0700965
Alex Elder3ce6cd12012-01-23 15:49:28 -0600966 ceph_xattr_init();
Sage Weil16725b92009-10-06 11:31:07 -0700967 ret = register_filesystem(&ceph_fs_type);
968 if (ret)
969 goto out_icache;
970
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700971 pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
972
Sage Weil16725b92009-10-06 11:31:07 -0700973 return 0;
974
975out_icache:
Alex Elder3ce6cd12012-01-23 15:49:28 -0600976 ceph_xattr_exit();
Sage Weil16725b92009-10-06 11:31:07 -0700977 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700978out:
979 return ret;
980}
981
982static void __exit exit_ceph(void)
983{
984 dout("exit_ceph\n");
985 unregister_filesystem(&ceph_fs_type);
Alex Elder3ce6cd12012-01-23 15:49:28 -0600986 ceph_xattr_exit();
Sage Weil16725b92009-10-06 11:31:07 -0700987 destroy_caches();
Sage Weil16725b92009-10-06 11:31:07 -0700988}
989
990module_init(init_ceph);
991module_exit(exit_ceph);
992
993MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
994MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
995MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
996MODULE_DESCRIPTION("Ceph filesystem for Linux");
997MODULE_LICENSE("GPL");