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/slab.h>
15 #include <linux/statfs.h>
16 #include <linux/string.h>
17 #include <linux/version.h>
18 #include <linux/vmalloc.h>
22 #include "mon_client.h"
26 * Ceph superblock operations
28 * Handle the basics of mounting, unmounting.
33 * find filename portion of a path (/foo/bar/baz -> baz)
35 const char *ceph_file_part(const char *s, int len)
37 const char *e = s + len;
39 while (e != s && *(e-1) != '/')
48 static void ceph_put_super(struct super_block *s)
50 struct ceph_client *client = ceph_sb_to_client(s);
53 ceph_mdsc_close_sessions(&client->mdsc);
56 * ensure we release the bdi before put_anon_super releases
59 if (s->s_bdi == &client->backing_dev_info) {
60 bdi_unregister(&client->backing_dev_info);
67 static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
69 struct ceph_client *client = ceph_inode_to_client(dentry->d_inode);
70 struct ceph_monmap *monmap = client->monc.monmap;
71 struct ceph_statfs st;
76 err = ceph_monc_do_statfs(&client->monc, &st);
81 buf->f_type = CEPH_SUPER_MAGIC; /* ?? */
84 * express utilization in terms of large blocks to avoid
85 * overflow on 32-bit machines.
87 buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
88 buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
89 buf->f_bfree = (le64_to_cpu(st.kb) - le64_to_cpu(st.kb_used)) >>
90 (CEPH_BLOCK_SHIFT-10);
91 buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
93 buf->f_files = le64_to_cpu(st.num_objects);
95 buf->f_namelen = PATH_MAX;
96 buf->f_frsize = PAGE_CACHE_SIZE;
98 /* leave fsid little-endian, regardless of host endianness */
99 fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
100 buf->f_fsid.val[0] = fsid & 0xffffffff;
101 buf->f_fsid.val[1] = fsid >> 32;
107 static int ceph_syncfs(struct super_block *sb, int wait)
109 dout("sync_fs %d\n", wait);
110 ceph_osdc_sync(&ceph_client(sb)->osdc);
111 ceph_mdsc_sync(&ceph_client(sb)->mdsc);
112 dout("sync_fs %d done\n", wait);
118 * ceph_show_options - Show mount options in /proc/mounts
119 * @m: seq_file to write to
120 * @mnt: mount descriptor
122 static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
124 struct ceph_client *client = ceph_sb_to_client(mnt->mnt_sb);
125 struct ceph_mount_args *args = client->mount_args;
127 if (args->flags & CEPH_OPT_FSID)
128 seq_printf(m, ",fsidmajor=%llu,fsidminor%llu",
129 le64_to_cpu(*(__le64 *)&args->fsid.fsid[0]),
130 le64_to_cpu(*(__le64 *)&args->fsid.fsid[8]));
131 if (args->flags & CEPH_OPT_NOSHARE)
132 seq_puts(m, ",noshare");
133 if (args->flags & CEPH_OPT_DIRSTAT)
134 seq_puts(m, ",dirstat");
135 if ((args->flags & CEPH_OPT_RBYTES) == 0)
136 seq_puts(m, ",norbytes");
137 if (args->flags & CEPH_OPT_NOCRC)
138 seq_puts(m, ",nocrc");
139 if (args->flags & CEPH_OPT_NOASYNCREADDIR)
140 seq_puts(m, ",noasyncreaddir");
141 if (strcmp(args->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
142 seq_printf(m, ",snapdirname=%s", args->snapdir_name);
144 seq_printf(m, ",name=%s", args->name);
146 seq_puts(m, ",secret=<hidden>");
153 struct kmem_cache *ceph_inode_cachep;
154 struct kmem_cache *ceph_cap_cachep;
155 struct kmem_cache *ceph_dentry_cachep;
156 struct kmem_cache *ceph_file_cachep;
158 static void ceph_inode_init_once(void *foo)
160 struct ceph_inode_info *ci = foo;
161 inode_init_once(&ci->vfs_inode);
164 static int default_congestion_kb(void)
171 * congestion size, scale with available memory.
183 * This allows larger machines to have larger/more transfers.
184 * Limit the default to 256M
186 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
187 if (congestion_kb > 256*1024)
188 congestion_kb = 256*1024;
190 return congestion_kb;
193 static int __init init_caches(void)
195 ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
196 sizeof(struct ceph_inode_info),
197 __alignof__(struct ceph_inode_info),
198 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
199 ceph_inode_init_once);
200 if (ceph_inode_cachep == NULL)
203 ceph_cap_cachep = KMEM_CACHE(ceph_cap,
204 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
205 if (ceph_cap_cachep == NULL)
208 ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
209 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
210 if (ceph_dentry_cachep == NULL)
213 ceph_file_cachep = KMEM_CACHE(ceph_file_info,
214 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
215 if (ceph_file_cachep == NULL)
221 kmem_cache_destroy(ceph_dentry_cachep);
223 kmem_cache_destroy(ceph_cap_cachep);
225 kmem_cache_destroy(ceph_inode_cachep);
229 static void destroy_caches(void)
231 kmem_cache_destroy(ceph_inode_cachep);
232 kmem_cache_destroy(ceph_cap_cachep);
233 kmem_cache_destroy(ceph_dentry_cachep);
234 kmem_cache_destroy(ceph_file_cachep);
239 * ceph_umount_begin - initiate forced umount. Tear down down the
240 * mount, skipping steps that may hang while waiting for server(s).
242 static void ceph_umount_begin(struct super_block *sb)
244 struct ceph_client *client = ceph_sb_to_client(sb);
246 dout("ceph_umount_begin - starting forced umount\n");
249 client->mount_state = CEPH_MOUNT_SHUTDOWN;
253 static const struct super_operations ceph_super_ops = {
254 .alloc_inode = ceph_alloc_inode,
255 .destroy_inode = ceph_destroy_inode,
256 .write_inode = ceph_write_inode,
257 .sync_fs = ceph_syncfs,
258 .put_super = ceph_put_super,
259 .show_options = ceph_show_options,
260 .statfs = ceph_statfs,
261 .umount_begin = ceph_umount_begin,
265 const char *ceph_msg_type_name(int type)
268 case CEPH_MSG_SHUTDOWN: return "shutdown";
269 case CEPH_MSG_PING: return "ping";
270 case CEPH_MSG_AUTH: return "auth";
271 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
272 case CEPH_MSG_MON_MAP: return "mon_map";
273 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
274 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
275 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
276 case CEPH_MSG_STATFS: return "statfs";
277 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
278 case CEPH_MSG_MDS_MAP: return "mds_map";
279 case CEPH_MSG_CLIENT_SESSION: return "client_session";
280 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
281 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
282 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
283 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
284 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
285 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
286 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
287 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
288 case CEPH_MSG_OSD_MAP: return "osd_map";
289 case CEPH_MSG_OSD_OP: return "osd_op";
290 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
291 default: return "unknown";
306 Opt_osdkeepalivetimeout,
309 Opt_caps_wanted_delay_min,
310 Opt_caps_wanted_delay_max,
311 Opt_readdir_max_entries,
319 /* string args above */
330 static match_table_t arg_tokens = {
331 {Opt_fsidmajor, "fsidmajor=%ld"},
332 {Opt_fsidminor, "fsidminor=%ld"},
333 {Opt_monport, "monport=%d"},
334 {Opt_wsize, "wsize=%d"},
335 {Opt_rsize, "rsize=%d"},
336 {Opt_osdtimeout, "osdtimeout=%d"},
337 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
338 {Opt_mount_timeout, "mount_timeout=%d"},
339 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
340 {Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
341 {Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
342 {Opt_readdir_max_entries, "readdir_max_entries=%d"},
343 {Opt_congestion_kb, "write_congestion_kb=%d"},
345 {Opt_snapdirname, "snapdirname=%s"},
346 {Opt_name, "name=%s"},
347 {Opt_secret, "secret=%s"},
348 /* string args above */
350 {Opt_noshare, "noshare"},
351 {Opt_dirstat, "dirstat"},
352 {Opt_nodirstat, "nodirstat"},
353 {Opt_rbytes, "rbytes"},
354 {Opt_norbytes, "norbytes"},
355 {Opt_nocrc, "nocrc"},
356 {Opt_noasyncreaddir, "noasyncreaddir"},
361 static struct ceph_mount_args *parse_mount_args(int flags, char *options,
362 const char *dev_name,
365 struct ceph_mount_args *args;
368 substring_t argstr[MAX_OPT_ARGS];
370 args = kzalloc(sizeof(*args), GFP_KERNEL);
372 return ERR_PTR(-ENOMEM);
373 args->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*args->mon_addr),
378 dout("parse_mount_args %p, dev_name '%s'\n", args, dev_name);
380 /* start with defaults */
381 args->sb_flags = flags;
382 args->flags = CEPH_OPT_DEFAULT;
383 args->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT;
384 args->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
385 args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
386 args->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
387 args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
388 args->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
389 args->rsize = CEPH_MOUNT_RSIZE_DEFAULT;
390 args->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
391 args->cap_release_safety = CEPH_CAPS_PER_RELEASE * 4;
392 args->max_readdir = 1024;
393 args->congestion_kb = default_congestion_kb();
395 /* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */
399 *path = strstr(dev_name, ":/");
401 pr_err("device name is missing path (no :/ in %s)\n",
407 err = ceph_parse_ips(dev_name, *path, args->mon_addr,
408 CEPH_MAX_MON, &args->num_mon);
414 dout("server path '%s'\n", *path);
416 /* parse mount options */
417 while ((c = strsep(&options, ",")) != NULL) {
418 int token, intval, ret;
422 token = match_token((char *)c, arg_tokens, argstr);
424 pr_err("bad mount option at '%s'\n", c);
427 if (token < Opt_last_int) {
428 ret = match_int(&argstr[0], &intval);
430 pr_err("bad mount option arg (not int) "
434 dout("got int token %d val %d\n", token, intval);
435 } else if (token > Opt_last_int && token < Opt_last_string) {
436 dout("got string token %d val %s\n", token,
439 dout("got token %d\n", token);
443 *(__le64 *)&args->fsid.fsid[0] = cpu_to_le64(intval);
446 *(__le64 *)&args->fsid.fsid[8] = cpu_to_le64(intval);
449 err = ceph_parse_ips(argstr[0].from,
455 args->flags |= CEPH_OPT_MYIP;
458 case Opt_snapdirname:
459 kfree(args->snapdir_name);
460 args->snapdir_name = kstrndup(argstr[0].from,
461 argstr[0].to-argstr[0].from,
465 args->name = kstrndup(argstr[0].from,
466 argstr[0].to-argstr[0].from,
470 args->secret = kstrndup(argstr[0].from,
471 argstr[0].to-argstr[0].from,
477 args->wsize = intval;
480 args->rsize = intval;
483 args->osd_timeout = intval;
485 case Opt_osdkeepalivetimeout:
486 args->osd_keepalive_timeout = intval;
488 case Opt_mount_timeout:
489 args->mount_timeout = intval;
491 case Opt_caps_wanted_delay_min:
492 args->caps_wanted_delay_min = intval;
494 case Opt_caps_wanted_delay_max:
495 args->caps_wanted_delay_max = intval;
497 case Opt_readdir_max_entries:
498 args->max_readdir = intval;
500 case Opt_congestion_kb:
501 args->congestion_kb = intval;
505 args->flags |= CEPH_OPT_NOSHARE;
509 args->flags |= CEPH_OPT_DIRSTAT;
512 args->flags &= ~CEPH_OPT_DIRSTAT;
515 args->flags |= CEPH_OPT_RBYTES;
518 args->flags &= ~CEPH_OPT_RBYTES;
521 args->flags |= CEPH_OPT_NOCRC;
523 case Opt_noasyncreaddir:
524 args->flags |= CEPH_OPT_NOASYNCREADDIR;
534 kfree(args->mon_addr);
539 static void destroy_mount_args(struct ceph_mount_args *args)
541 dout("destroy_mount_args %p\n", args);
542 kfree(args->snapdir_name);
543 args->snapdir_name = NULL;
552 * create a fresh client instance
554 static struct ceph_client *ceph_create_client(struct ceph_mount_args *args)
556 struct ceph_client *client;
559 client = kzalloc(sizeof(*client), GFP_KERNEL);
561 return ERR_PTR(-ENOMEM);
563 mutex_init(&client->mount_mutex);
565 init_waitqueue_head(&client->auth_wq);
568 client->mount_state = CEPH_MOUNT_MOUNTING;
569 client->mount_args = args;
573 client->auth_err = 0;
574 atomic_long_set(&client->writeback_count, 0);
576 err = bdi_init(&client->backing_dev_info);
581 client->wb_wq = create_workqueue("ceph-writeback");
582 if (client->wb_wq == NULL)
584 client->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid");
585 if (client->pg_inv_wq == NULL)
587 client->trunc_wq = create_singlethread_workqueue("ceph-trunc");
588 if (client->trunc_wq == NULL)
591 /* set up mempools */
593 client->wb_pagevec_pool = mempool_create_kmalloc_pool(10,
594 client->mount_args->wsize >> PAGE_CACHE_SHIFT);
595 if (!client->wb_pagevec_pool)
599 client->min_caps = args->max_readdir;
600 ceph_adjust_min_caps(client->min_caps);
603 err = ceph_monc_init(&client->monc, client);
606 err = ceph_osdc_init(&client->osdc, client);
609 err = ceph_mdsc_init(&client->mdsc, client);
615 ceph_osdc_stop(&client->osdc);
617 ceph_monc_stop(&client->monc);
619 mempool_destroy(client->wb_pagevec_pool);
621 destroy_workqueue(client->trunc_wq);
623 destroy_workqueue(client->pg_inv_wq);
625 destroy_workqueue(client->wb_wq);
627 bdi_destroy(&client->backing_dev_info);
633 static void ceph_destroy_client(struct ceph_client *client)
635 dout("destroy_client %p\n", client);
638 ceph_mdsc_stop(&client->mdsc);
639 ceph_monc_stop(&client->monc);
640 ceph_osdc_stop(&client->osdc);
642 ceph_adjust_min_caps(-client->min_caps);
644 ceph_debugfs_client_cleanup(client);
645 destroy_workqueue(client->wb_wq);
646 destroy_workqueue(client->pg_inv_wq);
647 destroy_workqueue(client->trunc_wq);
649 bdi_destroy(&client->backing_dev_info);
652 ceph_messenger_destroy(client->msgr);
653 mempool_destroy(client->wb_pagevec_pool);
655 destroy_mount_args(client->mount_args);
658 dout("destroy_client %p done\n", client);
662 * Initially learn our fsid, or verify an fsid matches.
664 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
666 if (client->have_fsid) {
667 if (ceph_fsid_compare(&client->fsid, fsid)) {
668 pr_err("bad fsid, had " FSID_FORMAT " got " FSID_FORMAT,
669 PR_FSID(&client->fsid), PR_FSID(fsid));
673 pr_info("client%lld fsid " FSID_FORMAT "\n",
674 client->monc.auth->global_id, PR_FSID(fsid));
675 memcpy(&client->fsid, fsid, sizeof(*fsid));
676 ceph_debugfs_client_init(client);
677 client->have_fsid = true;
683 * true if we have the mon map (and have thus joined the cluster)
685 static int have_mon_map(struct ceph_client *client)
687 return client->monc.monmap && client->monc.monmap->epoch;
691 * Bootstrap mount by opening the root directory. Note the mount
692 * @started time from caller, and time out if this takes too long.
694 static struct dentry *open_root_dentry(struct ceph_client *client,
696 unsigned long started)
698 struct ceph_mds_client *mdsc = &client->mdsc;
699 struct ceph_mds_request *req = NULL;
704 dout("open_root_inode opening '%s'\n", path);
705 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
707 return ERR_PTR(PTR_ERR(req));
708 req->r_path1 = kstrdup(path, GFP_NOFS);
709 req->r_ino1.ino = CEPH_INO_ROOT;
710 req->r_ino1.snap = CEPH_NOSNAP;
711 req->r_started = started;
712 req->r_timeout = client->mount_args->mount_timeout * HZ;
713 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
715 err = ceph_mdsc_do_request(mdsc, NULL, req);
717 dout("open_root_inode success\n");
718 if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT &&
719 client->sb->s_root == NULL)
720 root = d_alloc_root(req->r_target_inode);
722 root = d_obtain_alias(req->r_target_inode);
723 req->r_target_inode = NULL;
724 dout("open_root_inode success, root dentry is %p\n", root);
728 ceph_mdsc_put_request(req);
733 * mount: join the ceph cluster, and open root directory.
735 static int ceph_mount(struct ceph_client *client, struct vfsmount *mnt,
738 struct ceph_entity_addr *myaddr = NULL;
740 unsigned long timeout = client->mount_args->mount_timeout * HZ;
741 unsigned long started = jiffies; /* note the start time */
744 dout("mount start\n");
745 mutex_lock(&client->mount_mutex);
747 /* initialize the messenger */
748 if (client->msgr == NULL) {
749 if (ceph_test_opt(client, MYIP))
750 myaddr = &client->mount_args->my_addr;
751 client->msgr = ceph_messenger_create(myaddr);
752 if (IS_ERR(client->msgr)) {
753 err = PTR_ERR(client->msgr);
757 client->msgr->nocrc = ceph_test_opt(client, NOCRC);
760 /* open session, and wait for mon, mds, and osd maps */
761 err = ceph_monc_open_session(&client->monc);
765 while (!have_mon_map(client)) {
767 if (timeout && time_after_eq(jiffies, started + timeout))
771 dout("mount waiting for mon_map\n");
772 err = wait_event_interruptible_timeout(client->auth_wq,
773 have_mon_map(client) || (client->auth_err < 0),
775 if (err == -EINTR || err == -ERESTARTSYS)
777 if (client->auth_err < 0) {
778 err = client->auth_err;
783 dout("mount opening root\n");
784 root = open_root_dentry(client, "", started);
789 if (client->sb->s_root)
792 client->sb->s_root = root;
797 dout("mount opening base mountpoint\n");
798 root = open_root_dentry(client, path, started);
801 dput(client->sb->s_root);
802 client->sb->s_root = NULL;
807 mnt->mnt_root = root;
808 mnt->mnt_sb = client->sb;
810 client->mount_state = CEPH_MOUNT_MOUNTED;
811 dout("mount success\n");
815 mutex_unlock(&client->mount_mutex);
819 static int ceph_set_super(struct super_block *s, void *data)
821 struct ceph_client *client = data;
824 dout("set_super %p data %p\n", s, data);
826 s->s_flags = client->mount_args->sb_flags;
827 s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
829 s->s_fs_info = client;
832 s->s_op = &ceph_super_ops;
833 s->s_export_op = &ceph_export_ops;
835 s->s_time_gran = 1000; /* 1000 ns == 1 us */
837 ret = set_anon_super(s, NULL); /* what is that second arg for? */
850 * share superblock if same fs AND options
852 static int ceph_compare_super(struct super_block *sb, void *data)
854 struct ceph_client *new = data;
855 struct ceph_mount_args *args = new->mount_args;
856 struct ceph_client *other = ceph_sb_to_client(sb);
859 dout("ceph_compare_super %p\n", sb);
860 if (args->flags & CEPH_OPT_FSID) {
861 if (ceph_fsid_compare(&args->fsid, &other->fsid)) {
862 dout("fsid doesn't match\n");
866 /* do we share (a) monitor? */
867 for (i = 0; i < new->monc.monmap->num_mon; i++)
868 if (ceph_monmap_contains(other->monc.monmap,
869 &new->monc.monmap->mon_inst[i].addr))
871 if (i == new->monc.monmap->num_mon) {
872 dout("mon ip not part of monmap\n");
875 dout("mon ip matches existing sb %p\n", sb);
877 if (args->sb_flags != other->mount_args->sb_flags) {
878 dout("flags differ\n");
885 * construct our own bdi so we can control readahead, etc.
887 static int ceph_register_bdi(struct super_block *sb, struct ceph_client *client)
891 /* set ra_pages based on rsize mount option? */
892 if (client->mount_args->rsize >= PAGE_CACHE_SIZE)
893 client->backing_dev_info.ra_pages =
894 (client->mount_args->rsize + PAGE_CACHE_SIZE - 1)
896 err = bdi_register_dev(&client->backing_dev_info, sb->s_dev);
898 sb->s_bdi = &client->backing_dev_info;
902 static int ceph_get_sb(struct file_system_type *fs_type,
903 int flags, const char *dev_name, void *data,
904 struct vfsmount *mnt)
906 struct super_block *sb;
907 struct ceph_client *client;
909 int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
910 const char *path = NULL;
911 struct ceph_mount_args *args;
913 dout("ceph_get_sb\n");
914 args = parse_mount_args(flags, data, dev_name, &path);
920 /* create client (which we may/may not use) */
921 client = ceph_create_client(args);
922 if (IS_ERR(client)) {
923 err = PTR_ERR(client);
927 if (client->mount_args->flags & CEPH_OPT_NOSHARE)
928 compare_super = NULL;
929 sb = sget(fs_type, compare_super, ceph_set_super, client);
935 if (ceph_client(sb) != client) {
936 ceph_destroy_client(client);
937 client = ceph_client(sb);
938 dout("get_sb got existing client %p\n", client);
940 dout("get_sb using new client %p\n", client);
941 err = ceph_register_bdi(sb, client);
946 err = ceph_mount(client, mnt, path);
949 dout("root %p inode %p ino %llx.%llx\n", mnt->mnt_root,
950 mnt->mnt_root->d_inode, ceph_vinop(mnt->mnt_root->d_inode));
954 ceph_mdsc_close_sessions(&client->mdsc);
955 up_write(&sb->s_umount);
956 deactivate_super(sb);
960 ceph_destroy_client(client);
962 dout("ceph_get_sb fail %d\n", err);
966 static void ceph_kill_sb(struct super_block *s)
968 struct ceph_client *client = ceph_sb_to_client(s);
969 dout("kill_sb %p\n", s);
970 ceph_mdsc_pre_umount(&client->mdsc);
971 kill_anon_super(s); /* will call put_super after sb is r/o */
972 ceph_destroy_client(client);
975 static struct file_system_type ceph_fs_type = {
976 .owner = THIS_MODULE,
978 .get_sb = ceph_get_sb,
979 .kill_sb = ceph_kill_sb,
980 .fs_flags = FS_RENAME_DOES_D_MOVE,
983 #define _STRINGIFY(x) #x
984 #define STRINGIFY(x) _STRINGIFY(x)
986 static int __init init_ceph(void)
990 ret = ceph_debugfs_init();
994 ret = ceph_msgr_init();
1004 ret = register_filesystem(&ceph_fs_type);
1008 pr_info("loaded (mon/mds/osd proto %d/%d/%d, osdmap %d/%d %d/%d)\n",
1009 CEPH_MONC_PROTOCOL, CEPH_MDSC_PROTOCOL, CEPH_OSDC_PROTOCOL,
1010 CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
1011 CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT);
1019 ceph_debugfs_cleanup();
1024 static void __exit exit_ceph(void)
1026 dout("exit_ceph\n");
1027 unregister_filesystem(&ceph_fs_type);
1028 ceph_caps_finalize();
1031 ceph_debugfs_cleanup();
1034 module_init(init_ceph);
1035 module_exit(exit_ceph);
1037 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
1038 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
1039 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
1040 MODULE_DESCRIPTION("Ceph filesystem for Linux");
1041 MODULE_LICENSE("GPL");