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;
512 client
->wb_wq
= create_workqueue("ceph-writeback");
513 if (client
->wb_wq
== NULL
)
515 client
->pg_inv_wq
= create_singlethread_workqueue("ceph-pg-invalid");
516 if (client
->pg_inv_wq
== NULL
)
518 client
->trunc_wq
= create_singlethread_workqueue("ceph-trunc");
519 if (client
->trunc_wq
== NULL
)
523 err
= ceph_monc_init(&client
->monc
, client
);
526 err
= ceph_osdc_init(&client
->osdc
, client
);
529 ceph_mdsc_init(&client
->mdsc
, client
);
533 ceph_monc_stop(&client
->monc
);
535 destroy_workqueue(client
->trunc_wq
);
537 destroy_workqueue(client
->pg_inv_wq
);
539 destroy_workqueue(client
->wb_wq
);
545 static void ceph_destroy_client(struct ceph_client
*client
)
547 dout("destroy_client %p\n", client
);
550 ceph_mdsc_stop(&client
->mdsc
);
551 ceph_monc_stop(&client
->monc
);
552 ceph_osdc_stop(&client
->osdc
);
554 kfree(client
->signed_ticket
);
556 ceph_debugfs_client_cleanup(client
);
557 destroy_workqueue(client
->wb_wq
);
558 destroy_workqueue(client
->pg_inv_wq
);
559 destroy_workqueue(client
->trunc_wq
);
562 ceph_messenger_destroy(client
->msgr
);
563 if (client
->wb_pagevec_pool
)
564 mempool_destroy(client
->wb_pagevec_pool
);
566 destroy_mount_args(client
->mount_args
);
569 dout("destroy_client %p done\n", client
);
573 * true if we have the mon map (and have thus joined the cluster)
575 static int have_mon_map(struct ceph_client
*client
)
577 return client
->monc
.monmap
&& client
->monc
.monmap
->epoch
;
581 * Bootstrap mount by opening the root directory. Note the mount
582 * @started time from caller, and time out if this takes too long.
584 static struct dentry
*open_root_dentry(struct ceph_client
*client
,
586 unsigned long started
)
588 struct ceph_mds_client
*mdsc
= &client
->mdsc
;
589 struct ceph_mds_request
*req
= NULL
;
594 dout("open_root_inode opening '%s'\n", path
);
595 req
= ceph_mdsc_create_request(mdsc
, CEPH_MDS_OP_GETATTR
, USE_ANY_MDS
);
597 return ERR_PTR(PTR_ERR(req
));
598 req
->r_path1
= kstrdup(path
, GFP_NOFS
);
599 req
->r_ino1
.ino
= CEPH_INO_ROOT
;
600 req
->r_ino1
.snap
= CEPH_NOSNAP
;
601 req
->r_started
= started
;
602 req
->r_timeout
= client
->mount_args
->mount_timeout
* HZ
;
603 req
->r_args
.getattr
.mask
= cpu_to_le32(CEPH_STAT_CAP_INODE
);
605 err
= ceph_mdsc_do_request(mdsc
, NULL
, req
);
607 dout("open_root_inode success\n");
608 if (ceph_ino(req
->r_target_inode
) == CEPH_INO_ROOT
&&
609 client
->sb
->s_root
== NULL
)
610 root
= d_alloc_root(req
->r_target_inode
);
612 root
= d_obtain_alias(req
->r_target_inode
);
613 req
->r_target_inode
= NULL
;
614 dout("open_root_inode success, root dentry is %p\n", root
);
618 ceph_mdsc_put_request(req
);
623 * mount: join the ceph cluster, and open root directory.
625 static int ceph_mount(struct ceph_client
*client
, struct vfsmount
*mnt
,
628 struct ceph_entity_addr
*myaddr
= NULL
;
630 unsigned long timeout
= client
->mount_args
->mount_timeout
* HZ
;
631 unsigned long started
= jiffies
; /* note the start time */
634 dout("mount start\n");
635 mutex_lock(&client
->mount_mutex
);
637 /* initialize the messenger */
638 if (client
->msgr
== NULL
) {
639 if (ceph_test_opt(client
, MYIP
))
640 myaddr
= &client
->mount_args
->my_addr
;
641 client
->msgr
= ceph_messenger_create(myaddr
);
642 if (IS_ERR(client
->msgr
)) {
643 err
= PTR_ERR(client
->msgr
);
647 client
->msgr
->nocrc
= ceph_test_opt(client
, NOCRC
);
650 /* send mount request, and wait for mon, mds, and osd maps */
651 err
= ceph_monc_request_mount(&client
->monc
);
655 while (!have_mon_map(client
) && !client
->mount_err
) {
657 if (timeout
&& time_after_eq(jiffies
, started
+ timeout
))
661 dout("mount waiting for mount\n");
662 err
= wait_event_interruptible_timeout(client
->mount_wq
,
663 client
->mount_err
|| have_mon_map(client
),
665 if (err
== -EINTR
|| err
== -ERESTARTSYS
)
667 if (client
->mount_err
) {
668 err
= client
->mount_err
;
673 dout("mount opening root\n");
674 root
= open_root_dentry(client
, "", started
);
679 if (client
->sb
->s_root
)
682 client
->sb
->s_root
= root
;
687 dout("mount opening base mountpoint\n");
688 root
= open_root_dentry(client
, path
, started
);
691 dput(client
->sb
->s_root
);
692 client
->sb
->s_root
= NULL
;
697 mnt
->mnt_root
= root
;
698 mnt
->mnt_sb
= client
->sb
;
700 client
->mount_state
= CEPH_MOUNT_MOUNTED
;
701 dout("mount success\n");
705 mutex_unlock(&client
->mount_mutex
);
709 static int ceph_set_super(struct super_block
*s
, void *data
)
711 struct ceph_client
*client
= data
;
714 dout("set_super %p data %p\n", s
, data
);
716 s
->s_flags
= client
->mount_args
->sb_flags
;
717 s
->s_maxbytes
= 1ULL << 40; /* temp value until we get mdsmap */
719 s
->s_fs_info
= client
;
722 s
->s_op
= &ceph_super_ops
;
723 s
->s_export_op
= &ceph_export_ops
;
725 s
->s_time_gran
= 1000; /* 1000 ns == 1 us */
727 ret
= set_anon_super(s
, NULL
); /* what is that second arg for? */
740 * share superblock if same fs AND options
742 static int ceph_compare_super(struct super_block
*sb
, void *data
)
744 struct ceph_client
*new = data
;
745 struct ceph_mount_args
*args
= new->mount_args
;
746 struct ceph_client
*other
= ceph_sb_to_client(sb
);
749 dout("ceph_compare_super %p\n", sb
);
750 if (args
->flags
& CEPH_OPT_FSID
) {
751 if (ceph_fsid_compare(&args
->fsid
, &other
->fsid
)) {
752 dout("fsid doesn't match\n");
756 /* do we share (a) monitor? */
757 for (i
= 0; i
< new->monc
.monmap
->num_mon
; i
++)
758 if (ceph_monmap_contains(other
->monc
.monmap
,
759 &new->monc
.monmap
->mon_inst
[i
].addr
))
761 if (i
== new->monc
.monmap
->num_mon
) {
762 dout("mon ip not part of monmap\n");
765 dout("mon ip matches existing sb %p\n", sb
);
767 if (args
->sb_flags
!= other
->mount_args
->sb_flags
) {
768 dout("flags differ\n");
775 * construct our own bdi so we can control readahead, etc.
777 static int ceph_init_bdi(struct super_block
*sb
, struct ceph_client
*client
)
781 err
= bdi_init(&client
->backing_dev_info
);
784 sb
->s_bdi
= &client
->backing_dev_info
;
786 /* set ra_pages based on rsize mount option? */
787 if (client
->mount_args
->rsize
>= PAGE_CACHE_SIZE
)
788 client
->backing_dev_info
.ra_pages
=
789 (client
->mount_args
->rsize
+ PAGE_CACHE_SIZE
- 1)
792 err
= bdi_register_dev(&client
->backing_dev_info
, sb
->s_dev
);
796 static int ceph_get_sb(struct file_system_type
*fs_type
,
797 int flags
, const char *dev_name
, void *data
,
798 struct vfsmount
*mnt
)
800 struct super_block
*sb
;
801 struct ceph_client
*client
;
803 int (*compare_super
)(struct super_block
*, void *) = ceph_compare_super
;
804 const char *path
= 0;
805 struct ceph_mount_args
*args
;
807 dout("ceph_get_sb\n");
808 args
= parse_mount_args(flags
, data
, dev_name
, &path
);
814 /* create client (which we may/may not use) */
815 client
= ceph_create_client(args
);
816 if (IS_ERR(client
)) {
817 err
= PTR_ERR(client
);
821 if (client
->mount_args
->flags
& CEPH_OPT_NOSHARE
)
822 compare_super
= NULL
;
823 sb
= sget(fs_type
, compare_super
, ceph_set_super
, client
);
829 if (ceph_client(sb
) != client
) {
830 ceph_destroy_client(client
);
831 client
= ceph_client(sb
);
832 dout("get_sb got existing client %p\n", client
);
834 dout("get_sb using new client %p\n", client
);
836 /* set up mempools */
838 client
->wb_pagevec_pool
= mempool_create_kmalloc_pool(10,
839 client
->mount_args
->wsize
>> PAGE_CACHE_SHIFT
);
840 if (!client
->wb_pagevec_pool
)
843 err
= ceph_init_bdi(sb
, client
);
848 err
= ceph_mount(client
, mnt
, path
);
851 dout("root %p inode %p ino %llx.%llx\n", mnt
->mnt_root
,
852 mnt
->mnt_root
->d_inode
, ceph_vinop(mnt
->mnt_root
->d_inode
));
856 ceph_mdsc_close_sessions(&client
->mdsc
);
857 up_write(&sb
->s_umount
);
858 deactivate_super(sb
);
862 ceph_destroy_client(client
);
864 dout("ceph_get_sb fail %d\n", err
);
868 static void ceph_kill_sb(struct super_block
*s
)
870 struct ceph_client
*client
= ceph_sb_to_client(s
);
871 dout("kill_sb %p\n", s
);
872 ceph_mdsc_pre_umount(&client
->mdsc
);
873 kill_anon_super(s
); /* will call put_super after sb is r/o */
874 bdi_unregister(&client
->backing_dev_info
);
875 bdi_destroy(&client
->backing_dev_info
);
876 ceph_destroy_client(client
);
879 static struct file_system_type ceph_fs_type
= {
880 .owner
= THIS_MODULE
,
882 .get_sb
= ceph_get_sb
,
883 .kill_sb
= ceph_kill_sb
,
884 .fs_flags
= FS_RENAME_DOES_D_MOVE
,
887 #define _STRINGIFY(x) #x
888 #define STRINGIFY(x) _STRINGIFY(x)
890 static int __init
init_ceph(void)
894 ret
= ceph_debugfs_init();
898 ret
= ceph_msgr_init();
908 ret
= register_filesystem(&ceph_fs_type
);
912 pr_info("loaded %d.%d.%d (mon/mds/osd proto %d/%d/%d)\n",
913 CEPH_VERSION_MAJOR
, CEPH_VERSION_MINOR
, CEPH_VERSION_PATCH
,
914 CEPH_MONC_PROTOCOL
, CEPH_MDSC_PROTOCOL
, CEPH_OSDC_PROTOCOL
);
922 ceph_debugfs_cleanup();
927 static void __exit
exit_ceph(void)
930 unregister_filesystem(&ceph_fs_type
);
931 ceph_caps_finalize();
934 ceph_debugfs_cleanup();
937 module_init(init_ceph
);
938 module_exit(exit_ceph
);
940 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
941 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
942 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
943 MODULE_DESCRIPTION("Ceph filesystem for Linux");
944 MODULE_LICENSE("GPL");