2 #include "ceph_debug.h"
4 #include <linux/backing-dev.h>
6 #include <linux/inet.h>
8 #include <linux/module.h>
9 #include <linux/mount.h>
10 #include <linux/parser.h>
11 #include <linux/rwsem.h>
12 #include <linux/sched.h>
13 #include <linux/seq_file.h>
14 #include <linux/statfs.h>
15 #include <linux/string.h>
16 #include <linux/version.h>
17 #include <linux/vmalloc.h>
21 #include "mon_client.h"
24 * Ceph superblock operations
26 * Handle the basics of mounting, unmounting.
31 * find filename portion of a path (/foo/bar/baz -> baz)
33 const char *ceph_file_part(const char *s, int len)
35 const char *e = s + len;
37 while (e != s && *(e-1) != '/')
46 static void ceph_put_super(struct super_block *s)
48 struct ceph_client *cl = ceph_client(s);
51 ceph_mdsc_close_sessions(&cl->mdsc);
55 static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
57 struct ceph_client *client = ceph_inode_to_client(dentry->d_inode);
58 struct ceph_monmap *monmap = client->monc.monmap;
59 struct ceph_statfs st;
64 err = ceph_monc_do_statfs(&client->monc, &st);
69 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
72 * express utilization in terms of large blocks to avoid
73 * overflow on 32-bit machines.
75 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
76 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
77 buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >>
78 (CEPH_BLOCK_SHIFT-10);
79 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
81 buf->f_files = le64_to_cpu(st.num_objects);
83 buf->f_namelen = PATH_MAX;
84 buf->f_frsize = PAGE_CACHE_SIZE;
86 /* leave fsid little-endian, regardless of host endianness */
87 fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
88 buf->f_fsid.val[0] = fsid & 0xffffffff;
89 buf->f_fsid.val[1] = fsid >> 32;
95 static int ceph_syncfs(struct super_block *sb, int wait)
97 dout("sync_fs %d\n", wait);
98 ceph_osdc_sync(&ceph_client(sb)->osdc);
99 ceph_mdsc_sync(&ceph_client(sb)->mdsc);
100 dout("sync_fs %d done\n", wait);
106 * ceph_show_options - Show mount options in /proc/mounts
107 * @m: seq_file to write to
108 * @mnt: mount descriptor
110 static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
112 struct ceph_client *client = ceph_sb_to_client(mnt->mnt_sb);
113 struct ceph_mount_args *args = client->mount_args;
115 if (args->flags & CEPH_OPT_FSID)
116 seq_printf(m, ",fsidmajor=%llu,fsidminor%llu",
117 le64_to_cpu(*(__le64 *)&args->fsid.fsid[0]),
118 le64_to_cpu(*(__le64 *)&args->fsid.fsid[8]));
119 if (args->flags & CEPH_OPT_NOSHARE)
120 seq_puts(m, ",noshare");
121 if (args->flags & CEPH_OPT_DIRSTAT)
122 seq_puts(m, ",dirstat");
123 if ((args->flags & CEPH_OPT_RBYTES) == 0)
124 seq_puts(m, ",norbytes");
125 if (args->flags & CEPH_OPT_NOCRC)
126 seq_puts(m, ",nocrc");
127 if (args->flags & CEPH_OPT_NOASYNCREADDIR)
128 seq_puts(m, ",noasyncreaddir");
129 if (strcmp(args->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
130 seq_printf(m, ",snapdirname=%s", args->snapdir_name);
132 seq_puts(m, ",secret=<hidden>");
139 struct kmem_cache *ceph_inode_cachep;
140 struct kmem_cache *ceph_cap_cachep;
141 struct kmem_cache *ceph_dentry_cachep;
142 struct kmem_cache *ceph_file_cachep;
144 static void ceph_inode_init_once(void *foo)
146 struct ceph_inode_info *ci = foo;
147 inode_init_once(&ci->vfs_inode);
150 static int __init init_caches(void)
152 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
153 sizeof(struct ceph_inode_info),
154 __alignof__(struct ceph_inode_info),
155 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
156 ceph_inode_init_once);
157 if (ceph_inode_cachep == NULL)
160 ceph_cap_cachep = KMEM_CACHE(ceph_cap,
161 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
162 if (ceph_cap_cachep == NULL)
165 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
166 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
167 if (ceph_dentry_cachep == NULL)
170 ceph_file_cachep = KMEM_CACHE(ceph_file_info,
171 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
172 if (ceph_file_cachep == NULL)
178 kmem_cache_destroy(ceph_dentry_cachep);
180 kmem_cache_destroy(ceph_cap_cachep);
182 kmem_cache_destroy(ceph_inode_cachep);
186 static void destroy_caches(void)
188 kmem_cache_destroy(ceph_inode_cachep);
189 kmem_cache_destroy(ceph_cap_cachep);
190 kmem_cache_destroy(ceph_dentry_cachep);
191 kmem_cache_destroy(ceph_file_cachep);
196 * ceph_umount_begin - initiate forced umount. Tear down down the
197 * mount, skipping steps that may hang while waiting for server(s).
199 static void ceph_umount_begin(struct super_block *sb)
201 struct ceph_client *client = ceph_sb_to_client(sb);
203 dout("ceph_umount_begin - starting forced umount\n");
206 client->mount_state = CEPH_MOUNT_SHUTDOWN;
210 static const struct super_operations ceph_super_ops = {
211 .alloc_inode = ceph_alloc_inode,
212 .destroy_inode = ceph_destroy_inode,
213 .write_inode = ceph_write_inode,
214 .sync_fs = ceph_syncfs,
215 .put_super = ceph_put_super,
216 .show_options = ceph_show_options,
217 .statfs = ceph_statfs,
218 .umount_begin = ceph_umount_begin,
222 const char *ceph_msg_type_name(int type)
225 case CEPH_MSG_SHUTDOWN: return "shutdown";
226 case CEPH_MSG_PING: return "ping";
227 case CEPH_MSG_MON_MAP: return "mon_map";
228 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
229 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
230 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
231 case CEPH_MSG_CLIENT_MOUNT: return "client_mount";
232 case CEPH_MSG_CLIENT_MOUNT_ACK: return "client_mount_ack";
233 case CEPH_MSG_STATFS: return "statfs";
234 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
235 case CEPH_MSG_MDS_MAP: return "mds_map";
236 case CEPH_MSG_CLIENT_SESSION: return "client_session";
237 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
238 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
239 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
240 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
241 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
242 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
243 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
244 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
245 case CEPH_MSG_OSD_MAP: return "osd_map";
246 case CEPH_MSG_OSD_OP: return "osd_op";
247 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
248 default: return "unknown";
264 Opt_caps_wanted_delay_min,
265 Opt_caps_wanted_delay_max,
266 Opt_readdir_max_entries,
272 /* string args above */
283 static match_table_t arg_tokens = {
284 {Opt_fsidmajor, "fsidmajor=%ld"},
285 {Opt_fsidminor, "fsidminor=%ld"},
286 {Opt_monport, "monport=%d"},
287 {Opt_wsize, "wsize=%d"},
288 {Opt_rsize, "rsize=%d"},
289 {Opt_osdtimeout, "osdtimeout=%d"},
290 {Opt_mount_timeout, "mount_timeout=%d"},
291 {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
292 {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
293 {Opt_readdir_max_entries, "readdir_max_entries=%d"},
295 {Opt_snapdirname, "snapdirname=%s"},
296 {Opt_secret, "secret=%s"},
297 /* string args above */
299 {Opt_noshare, "noshare"},
300 {Opt_dirstat, "dirstat"},
301 {Opt_nodirstat, "nodirstat"},
302 {Opt_rbytes, "rbytes"},
303 {Opt_norbytes, "norbytes"},
304 {Opt_nocrc, "nocrc"},
305 {Opt_noasyncreaddir, "noasyncreaddir"},
310 static struct ceph_mount_args *parse_mount_args(int flags, char *options,
311 const char *dev_name,
314 struct ceph_mount_args *args;
317 substring_t argstr[MAX_OPT_ARGS];
319 args = kzalloc(sizeof(*args), GFP_KERNEL);
321 return ERR_PTR(-ENOMEM);
322 args->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*args->mon_addr),
327 dout("parse_mount_args %p, dev_name '%s'\n", args, dev_name);
329 /* start with defaults */
330 args->sb_flags = flags;
331 args->flags = CEPH_OPT_DEFAULT;
332 args->osd_timeout = 5; /* seconds */
333 args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
334 args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
335 args->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
336 args->rsize = CEPH_MOUNT_RSIZE_DEFAULT;
337 args->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
338 args->cap_release_safety = CEPH_CAPS_PER_RELEASE * 4;
339 args->max_readdir = 1024;
341 /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */
345 *path = strstr(dev_name, ":/");
347 pr_err("device name is missing path (no :/ in %s)\n",
353 err = ceph_parse_ips(dev_name, *path, args->mon_addr,
354 CEPH_MAX_MON, &args->num_mon);
360 dout("server path '%s'\n", *path);
362 /* parse mount options */
363 while ((c = strsep(&options, ",")) != NULL) {
364 int token, intval, ret;
368 token = match_token((char *)c, arg_tokens, argstr);
370 pr_err("bad mount option at '%s'\n", c);
373 if (token < Opt_last_int) {
374 ret = match_int(&argstr[0], &intval);
376 pr_err("bad mount option arg (not int) "
380 dout("got int token %d val %d\n", token, intval);
381 } else if (token > Opt_last_int && token < Opt_last_string) {
382 dout("got string token %d val %s\n", token,
385 dout("got token %d\n", token);
389 *(__le64 *)&args->fsid.fsid[0] = cpu_to_le64(intval);
392 *(__le64 *)&args->fsid.fsid[8] = cpu_to_le64(intval);
395 err = ceph_parse_ips(argstr[0].from,
401 args->flags |= CEPH_OPT_MYIP;
404 case Opt_snapdirname:
405 kfree(args->snapdir_name);
406 args->snapdir_name = kstrndup(argstr[0].from,
407 argstr[0].to-argstr[0].from,
411 args->secret = kstrndup(argstr[0].from,
412 argstr[0].to-argstr[0].from,
418 args->wsize = intval;
421 args->rsize = intval;
424 args->osd_timeout = intval;
426 case Opt_mount_timeout:
427 args->mount_timeout = intval;
429 case Opt_caps_wanted_delay_min:
430 args->caps_wanted_delay_min = intval;
432 case Opt_caps_wanted_delay_max:
433 args->caps_wanted_delay_max = intval;
435 case Opt_readdir_max_entries:
436 args->max_readdir = intval;
440 args->flags |= CEPH_OPT_NOSHARE;
444 args->flags |= CEPH_OPT_DIRSTAT;
447 args->flags &= ~CEPH_OPT_DIRSTAT;
450 args->flags |= CEPH_OPT_RBYTES;
453 args->flags &= ~CEPH_OPT_RBYTES;
456 args->flags |= CEPH_OPT_NOCRC;
458 case Opt_noasyncreaddir:
459 args->flags |= CEPH_OPT_NOASYNCREADDIR;
469 kfree(args->mon_addr);
474 static void destroy_mount_args(struct ceph_mount_args *args)
476 dout("destroy_mount_args %p\n", args);
477 kfree(args->snapdir_name);
478 args->snapdir_name = NULL;
485 * create a fresh client instance
487 static struct ceph_client *ceph_create_client(struct ceph_mount_args *args)
489 struct ceph_client *client;
492 client = kzalloc(sizeof(*client), GFP_KERNEL);
494 return ERR_PTR(-ENOMEM);
496 mutex_init(&client->mount_mutex);
498 init_waitqueue_head(&client->mount_wq);
501 client->mount_state = CEPH_MOUNT_MOUNTING;
503 client->mount_args = args;
507 client->mount_err = 0;
508 client->signed_ticket = NULL;
509 client->signed_ticket_len = 0;
511 err = bdi_init(&client->backing_dev_info);
516 client->wb_wq = create_workqueue("ceph-writeback");
517 if (client->wb_wq == NULL)
519 client->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid");
520 if (client->pg_inv_wq == NULL)
522 client->trunc_wq = create_singlethread_workqueue("ceph-trunc");
523 if (client->trunc_wq == NULL)
527 err = ceph_monc_init(&client->monc, client);
530 err = ceph_osdc_init(&client->osdc, client);
533 ceph_mdsc_init(&client->mdsc, client);
537 ceph_monc_stop(&client->monc);
539 destroy_workqueue(client->trunc_wq);
541 destroy_workqueue(client->pg_inv_wq);
543 destroy_workqueue(client->wb_wq);
545 bdi_destroy(&client->backing_dev_info);
551 static void ceph_destroy_client(struct ceph_client *client)
553 dout("destroy_client %p\n", client);
556 ceph_mdsc_stop(&client->mdsc);
557 ceph_monc_stop(&client->monc);
558 ceph_osdc_stop(&client->osdc);
560 kfree(client->signed_ticket);
562 ceph_debugfs_client_cleanup(client);
563 destroy_workqueue(client->wb_wq);
564 destroy_workqueue(client->pg_inv_wq);
565 destroy_workqueue(client->trunc_wq);
568 ceph_messenger_destroy(client->msgr);
569 if (client->wb_pagevec_pool)
570 mempool_destroy(client->wb_pagevec_pool);
572 destroy_mount_args(client->mount_args);
575 dout("destroy_client %p done\n", client);
579 * true if we have the mon map (and have thus joined the cluster)
581 static int have_mon_map(struct ceph_client *client)
583 return client->monc.monmap && client->monc.monmap->epoch;
587 * Bootstrap mount by opening the root directory. Note the mount
588 * @started time from caller, and time out if this takes too long.
590 static struct dentry *open_root_dentry(struct ceph_client *client,
592 unsigned long started)
594 struct ceph_mds_client *mdsc = &client->mdsc;
595 struct ceph_mds_request *req = NULL;
600 dout("open_root_inode opening '%s'\n", path);
601 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
603 return ERR_PTR(PTR_ERR(req));
604 req->r_path1 = kstrdup(path, GFP_NOFS);
605 req->r_ino1.ino = CEPH_INO_ROOT;
606 req->r_ino1.snap = CEPH_NOSNAP;
607 req->r_started = started;
608 req->r_timeout = client->mount_args->mount_timeout * HZ;
609 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
611 err = ceph_mdsc_do_request(mdsc, NULL, req);
613 dout("open_root_inode success\n");
614 if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT &&
615 client->sb->s_root == NULL)
616 root = d_alloc_root(req->r_target_inode);
618 root = d_obtain_alias(req->r_target_inode);
619 req->r_target_inode = NULL;
620 dout("open_root_inode success, root dentry is %p\n", root);
624 ceph_mdsc_put_request(req);
629 * mount: join the ceph cluster, and open root directory.
631 static int ceph_mount(struct ceph_client *client, struct vfsmount *mnt,
634 struct ceph_entity_addr *myaddr = NULL;
636 unsigned long timeout = client->mount_args->mount_timeout * HZ;
637 unsigned long started = jiffies; /* note the start time */
640 dout("mount start\n");
641 mutex_lock(&client->mount_mutex);
643 /* initialize the messenger */
644 if (client->msgr == NULL) {
645 if (ceph_test_opt(client, MYIP))
646 myaddr = &client->mount_args->my_addr;
647 client->msgr = ceph_messenger_create(myaddr);
648 if (IS_ERR(client->msgr)) {
649 err = PTR_ERR(client->msgr);
653 client->msgr->nocrc = ceph_test_opt(client, NOCRC);
656 /* send mount request, and wait for mon, mds, and osd maps */
657 err = ceph_monc_request_mount(&client->monc);
661 while (!have_mon_map(client) && !client->mount_err) {
663 if (timeout && time_after_eq(jiffies, started + timeout))
667 dout("mount waiting for mount\n");
668 err = wait_event_interruptible_timeout(client->mount_wq,
669 client->mount_err || have_mon_map(client),
671 if (err == -EINTR || err == -ERESTARTSYS)
673 if (client->mount_err) {
674 err = client->mount_err;
679 dout("mount opening root\n");
680 root = open_root_dentry(client, "", started);
685 if (client->sb->s_root)
688 client->sb->s_root = root;
693 dout("mount opening base mountpoint\n");
694 root = open_root_dentry(client, path, started);
697 dput(client->sb->s_root);
698 client->sb->s_root = NULL;
703 mnt->mnt_root = root;
704 mnt->mnt_sb = client->sb;
706 client->mount_state = CEPH_MOUNT_MOUNTED;
707 dout("mount success\n");
711 mutex_unlock(&client->mount_mutex);
715 static int ceph_set_super(struct super_block *s, void *data)
717 struct ceph_client *client = data;
720 dout("set_super %p data %p\n", s, data);
722 s->s_flags = client->mount_args->sb_flags;
723 s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
725 s->s_fs_info = client;
728 s->s_op = &ceph_super_ops;
729 s->s_export_op = &ceph_export_ops;
731 s->s_time_gran = 1000; /* 1000 ns == 1 us */
733 ret = set_anon_super(s, NULL); /* what is that second arg for? */
746 * share superblock if same fs AND options
748 static int ceph_compare_super(struct super_block *sb, void *data)
750 struct ceph_client *new = data;
751 struct ceph_mount_args *args = new->mount_args;
752 struct ceph_client *other = ceph_sb_to_client(sb);
755 dout("ceph_compare_super %p\n", sb);
756 if (args->flags & CEPH_OPT_FSID) {
757 if (ceph_fsid_compare(&args->fsid, &other->fsid)) {
758 dout("fsid doesn't match\n");
762 /* do we share (a) monitor? */
763 for (i = 0; i < new->monc.monmap->num_mon; i++)
764 if (ceph_monmap_contains(other->monc.monmap,
765 &new->monc.monmap->mon_inst[i].addr))
767 if (i == new->monc.monmap->num_mon) {
768 dout("mon ip not part of monmap\n");
771 dout("mon ip matches existing sb %p\n", sb);
773 if (args->sb_flags != other->mount_args->sb_flags) {
774 dout("flags differ\n");
781 * construct our own bdi so we can control readahead, etc.
783 static int ceph_register_bdi(struct super_block *sb, struct ceph_client *client)
787 sb->s_bdi = &client->backing_dev_info;
789 /* set ra_pages based on rsize mount option? */
790 if (client->mount_args->rsize >= PAGE_CACHE_SIZE)
791 client->backing_dev_info.ra_pages =
792 (client->mount_args->rsize + PAGE_CACHE_SIZE - 1)
795 err = bdi_register_dev(&client->backing_dev_info, sb->s_dev);
799 static int ceph_get_sb(struct file_system_type *fs_type,
800 int flags, const char *dev_name, void *data,
801 struct vfsmount *mnt)
803 struct super_block *sb;
804 struct ceph_client *client;
806 int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
807 const char *path = NULL;
808 struct ceph_mount_args *args;
810 dout("ceph_get_sb\n");
811 args = parse_mount_args(flags, data, dev_name, &path);
817 /* create client (which we may/may not use) */
818 client = ceph_create_client(args);
819 if (IS_ERR(client)) {
820 err = PTR_ERR(client);
824 if (client->mount_args->flags & CEPH_OPT_NOSHARE)
825 compare_super = NULL;
826 sb = sget(fs_type, compare_super, ceph_set_super, client);
832 if (ceph_client(sb) != client) {
833 ceph_destroy_client(client);
834 client = ceph_client(sb);
835 dout("get_sb got existing client %p\n", client);
837 dout("get_sb using new client %p\n", client);
839 /* set up mempools */
841 client->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
842 client->mount_args->wsize >> PAGE_CACHE_SHIFT);
843 if (!client->wb_pagevec_pool)
846 err = ceph_register_bdi(sb, client);
851 err = ceph_mount(client, mnt, path);
854 dout("root %p inode %p ino %llx.%llx\n", mnt->mnt_root,
855 mnt->mnt_root->d_inode, ceph_vinop(mnt->mnt_root->d_inode));
859 ceph_mdsc_close_sessions(&client->mdsc);
860 up_write(&sb->s_umount);
861 deactivate_super(sb);
865 ceph_destroy_client(client);
867 dout("ceph_get_sb fail %d\n", err);
871 static void ceph_kill_sb(struct super_block *s)
873 struct ceph_client *client = ceph_sb_to_client(s);
874 dout("kill_sb %p\n", s);
875 ceph_mdsc_pre_umount(&client->mdsc);
876 kill_anon_super(s); /* will call put_super after sb is r/o */
877 bdi_unregister(&client->backing_dev_info);
878 bdi_destroy(&client->backing_dev_info);
879 ceph_destroy_client(client);
882 static struct file_system_type ceph_fs_type = {
883 .owner = THIS_MODULE,
885 .get_sb = ceph_get_sb,
886 .kill_sb = ceph_kill_sb,
887 .fs_flags = FS_RENAME_DOES_D_MOVE,
890 #define _STRINGIFY(x) #x
891 #define STRINGIFY(x) _STRINGIFY(x)
893 static int __init init_ceph(void)
897 ret = ceph_debugfs_init();
901 ret = ceph_msgr_init();
911 ret = register_filesystem(&ceph_fs_type);
915 pr_info("loaded %d.%d.%d (mon/mds/osd proto %d/%d/%d)\n",
916 CEPH_VERSION_MAJOR, CEPH_VERSION_MINOR, CEPH_VERSION_PATCH,
917 CEPH_MONC_PROTOCOL, CEPH_MDSC_PROTOCOL, CEPH_OSDC_PROTOCOL);
925 ceph_debugfs_cleanup();
930 static void __exit exit_ceph(void)
933 unregister_filesystem(&ceph_fs_type);
934 ceph_caps_finalize();
937 ceph_debugfs_cleanup();
940 module_init(init_ceph);
941 module_exit(exit_ceph);
943 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
944 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
945 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
946 MODULE_DESCRIPTION("Ceph filesystem for Linux");
947 MODULE_LICENSE("GPL");