2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/vfs/hammer/hammer_vfsops.c,v 1.18 2008/02/08 08:31:00 dillon Exp $
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/vnode.h>
41 #include <sys/mount.h>
42 #include <sys/malloc.h>
43 #include <sys/nlookup.h>
44 #include <sys/fcntl.h>
45 #include <sys/sysctl.h>
50 int hammer_debug_general
;
51 int hammer_debug_btree
;
53 int hammer_debug_recover
; /* -1 will disable, +1 will force */
54 int hammer_debug_recover_faults
;
55 int hammer_count_inodes
;
56 int hammer_count_records
;
57 int hammer_count_record_datas
;
58 int hammer_count_volumes
;
59 int hammer_count_buffers
;
60 int hammer_count_nodes
;
62 SYSCTL_NODE(_vfs
, OID_AUTO
, hammer
, CTLFLAG_RW
, 0, "HAMMER filesystem");
63 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_general
, CTLFLAG_RW
,
64 &hammer_debug_general
, 0, "");
65 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_btree
, CTLFLAG_RW
,
66 &hammer_debug_btree
, 0, "");
67 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_tid
, CTLFLAG_RW
,
68 &hammer_debug_tid
, 0, "");
69 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover
, CTLFLAG_RW
,
70 &hammer_debug_recover
, 0, "");
71 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover_faults
, CTLFLAG_RW
,
72 &hammer_debug_recover_faults
, 0, "");
73 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_inodes
, CTLFLAG_RD
,
74 &hammer_count_inodes
, 0, "");
75 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_records
, CTLFLAG_RD
,
76 &hammer_count_records
, 0, "");
77 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_record_datas
, CTLFLAG_RD
,
78 &hammer_count_record_datas
, 0, "");
79 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_volumes
, CTLFLAG_RD
,
80 &hammer_count_volumes
, 0, "");
81 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_buffers
, CTLFLAG_RD
,
82 &hammer_count_buffers
, 0, "");
83 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_nodes
, CTLFLAG_RD
,
84 &hammer_count_nodes
, 0, "");
89 static void hammer_free_hmp(struct mount
*mp
);
91 static int hammer_vfs_mount(struct mount
*mp
, char *path
, caddr_t data
,
93 static int hammer_vfs_unmount(struct mount
*mp
, int mntflags
);
94 static int hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
);
95 static int hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
,
97 static int hammer_vfs_sync(struct mount
*mp
, int waitfor
);
98 static int hammer_vfs_vget(struct mount
*mp
, ino_t ino
,
100 static int hammer_vfs_init(struct vfsconf
*conf
);
101 static int hammer_vfs_fhtovp(struct mount
*mp
, struct fid
*fhp
,
103 static int hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
);
104 static int hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
105 int *exflagsp
, struct ucred
**credanonp
);
108 static struct vfsops hammer_vfsops
= {
109 .vfs_mount
= hammer_vfs_mount
,
110 .vfs_unmount
= hammer_vfs_unmount
,
111 .vfs_root
= hammer_vfs_root
,
112 .vfs_statfs
= hammer_vfs_statfs
,
113 .vfs_sync
= hammer_vfs_sync
,
114 .vfs_vget
= hammer_vfs_vget
,
115 .vfs_init
= hammer_vfs_init
,
116 .vfs_vptofh
= hammer_vfs_vptofh
,
117 .vfs_fhtovp
= hammer_vfs_fhtovp
,
118 .vfs_checkexp
= hammer_vfs_checkexp
121 MALLOC_DEFINE(M_HAMMER
, "hammer-mount", "hammer mount");
123 VFS_SET(hammer_vfsops
, hammer
, 0);
124 MODULE_VERSION(hammer
, 1);
127 hammer_vfs_init(struct vfsconf
*conf
)
129 /*hammer_init_alist_config();*/
134 hammer_vfs_mount(struct mount
*mp
, char *mntpt
, caddr_t data
,
137 struct hammer_mount_info info
;
139 hammer_volume_t rootvol
;
140 struct vnode
*rootvp
;
141 const char *upath
; /* volume name in userspace */
142 char *path
; /* volume name in system space */
146 if ((error
= copyin(data
, &info
, sizeof(info
))) != 0)
148 if (info
.nvolumes
<= 0 || info
.nvolumes
>= 32768)
152 * Interal mount data structure
154 if (mp
->mnt_flag
& MNT_UPDATE
) {
155 hmp
= (void *)mp
->mnt_data
;
156 KKASSERT(hmp
!= NULL
);
158 hmp
= kmalloc(sizeof(*hmp
), M_HAMMER
, M_WAITOK
| M_ZERO
);
159 mp
->mnt_data
= (qaddr_t
)hmp
;
161 hmp
->zbuf
= kmalloc(HAMMER_BUFSIZE
, M_HAMMER
, M_WAITOK
|M_ZERO
);
162 hmp
->namekey_iterator
= mycpu
->gd_time_seconds
;
163 /*TAILQ_INIT(&hmp->recycle_list);*/
165 hmp
->root_btree_beg
.obj_id
= -0x8000000000000000LL
;
166 hmp
->root_btree_beg
.key
= -0x8000000000000000LL
;
167 hmp
->root_btree_beg
.create_tid
= 1;
168 hmp
->root_btree_beg
.delete_tid
= 1;
169 hmp
->root_btree_beg
.rec_type
= 0;
170 hmp
->root_btree_beg
.obj_type
= 0;
172 hmp
->root_btree_end
.obj_id
= 0x7FFFFFFFFFFFFFFFLL
;
173 hmp
->root_btree_end
.key
= 0x7FFFFFFFFFFFFFFFLL
;
174 hmp
->root_btree_end
.create_tid
= 0xFFFFFFFFFFFFFFFFULL
;
175 hmp
->root_btree_end
.delete_tid
= 0; /* special case */
176 hmp
->root_btree_end
.rec_type
= 0xFFFFU
;
177 hmp
->root_btree_end
.obj_type
= 0;
179 hmp
->hflags
= info
.hflags
;
181 mp
->mnt_flag
|= MNT_RDONLY
;
182 hmp
->asof
= info
.asof
;
184 hmp
->asof
= HAMMER_MAX_TID
;
188 * Re-open read-write if originally read-only, or vise-versa XXX
190 if (mp
->mnt_flag
& MNT_UPDATE
) {
191 if (hmp
->ronly
== 0 && (mp
->mnt_flag
& MNT_RDONLY
)) {
192 kprintf("HAMMER read-write -> read-only XXX\n");
194 } else if (hmp
->ronly
&& (mp
->mnt_flag
& MNT_RDONLY
) == 0) {
195 kprintf("HAMMER read-only -> read-write XXX\n");
201 RB_INIT(&hmp
->rb_vols_root
);
202 RB_INIT(&hmp
->rb_inos_root
);
203 hmp
->ronly
= ((mp
->mnt_flag
& MNT_RDONLY
) != 0);
208 path
= objcache_get(namei_oc
, M_WAITOK
);
209 hmp
->nvolumes
= info
.nvolumes
;
210 for (i
= 0; i
< info
.nvolumes
; ++i
) {
211 error
= copyin(&info
.volumes
[i
], &upath
, sizeof(char *));
213 error
= copyinstr(upath
, path
, MAXPATHLEN
, NULL
);
215 error
= hammer_install_volume(hmp
, path
);
219 objcache_put(namei_oc
, path
);
222 * Make sure we found a root volume
224 if (error
== 0 && hmp
->rootvol
== NULL
) {
225 kprintf("hammer_mount: No root volume found!\n");
234 * No errors, setup enough of the mount point so we can lookup the
237 mp
->mnt_iosize_max
= MAXPHYS
;
238 mp
->mnt_kern_flag
|= MNTK_FSMID
;
241 * note: f_iosize is used by vnode_pager_haspage() when constructing
244 mp
->mnt_stat
.f_iosize
= HAMMER_BUFSIZE
;
245 mp
->mnt_stat
.f_bsize
= HAMMER_BUFSIZE
;
246 mp
->mnt_maxsymlinklen
= 255;
247 mp
->mnt_flag
|= MNT_LOCAL
;
249 vfs_add_vnodeops(mp
, &hammer_vnode_vops
, &mp
->mnt_vn_norm_ops
);
250 vfs_add_vnodeops(mp
, &hammer_spec_vops
, &mp
->mnt_vn_spec_ops
);
251 vfs_add_vnodeops(mp
, &hammer_fifo_vops
, &mp
->mnt_vn_fifo_ops
);
254 * The root volume's ondisk pointer is only valid if we hold a
257 rootvol
= hammer_get_root_volume(hmp
, &error
);
260 ksnprintf(mp
->mnt_stat
.f_mntfromname
,
261 sizeof(mp
->mnt_stat
.f_mntfromname
), "%s",
262 rootvol
->ondisk
->vol_name
);
263 mp
->mnt_stat
.f_fsid
.val
[0] =
264 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 0, 8);
265 mp
->mnt_stat
.f_fsid
.val
[1] =
266 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 8, 8);
267 hammer_rel_volume(rootvol
, 0);
270 * Locate the root directory using the root cluster's B-Tree as a
271 * starting point. The root directory uses an obj_id of 1.
273 * FUTURE: Leave the root directory cached referenced but unlocked
274 * in hmp->rootvp (need to flush it on unmount).
276 error
= hammer_vfs_vget(mp
, 1, &rootvp
);
280 /*vn_unlock(hmp->rootvp);*/
284 * Cleanup and return.
292 hammer_vfs_unmount(struct mount
*mp
, int mntflags
)
295 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
301 * Clean out the vnodes
304 if (mntflags
& MNT_FORCE
)
306 if ((error
= vflush(mp
, 0, flags
)) != 0)
310 * Clean up the internal mount structure and related entities. This
318 * Clean up the internal mount structure and disassociate it from the mount.
319 * This may issue I/O.
322 hammer_free_hmp(struct mount
*mp
)
324 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
328 * Clean up the root vnode
337 * Unload & flush inodes
339 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
340 hammer_unload_inode
, (void *)MNT_WAIT
);
343 * Unload & flush volumes
345 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
346 hammer_unload_volume
, NULL
);
349 mp
->mnt_flag
&= ~MNT_LOCAL
;
351 kfree(hmp
->zbuf
, M_HAMMER
);
352 kfree(hmp
, M_HAMMER
);
356 * Obtain a vnode for the specified inode number. An exclusively locked
360 hammer_vfs_vget(struct mount
*mp
, ino_t ino
, struct vnode
**vpp
)
362 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
363 struct hammer_inode
*ip
;
367 * Get/allocate the hammer_inode structure. The structure must be
368 * unlocked while we manipulate the related vnode to avoid a
371 ip
= hammer_get_inode(hmp
, NULL
, ino
, hmp
->asof
, 0, &error
);
376 error
= hammer_get_vnode(ip
, LK_EXCLUSIVE
, vpp
);
377 hammer_rel_inode(ip
, 0);
382 * Return the root vnode for the filesystem.
384 * HAMMER stores the root vnode in the hammer_mount structure so
385 * getting it is easy.
388 hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
)
391 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
395 error
= hammer_vfs_vget(mp
, 1, vpp
);
400 hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
, struct ucred
*cred
)
402 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
403 hammer_volume_t volume
;
404 hammer_volume_ondisk_t ondisk
;
408 hammer_off_t fifo_beg
;
409 hammer_off_t fifo_end
;
411 volume
= hammer_get_root_volume(hmp
, &error
);
414 ondisk
= volume
->ondisk
;
419 mp
->mnt_stat
.f_files
= ondisk
->vol0_stat_inodes
;
420 fifo_beg
= ondisk
->vol0_fifo_beg
;
421 fifo_end
= ondisk
->vol0_fifo_end
;
422 hammer_rel_volume(volume
, 0);
425 * Calculate how many free blocks we have by counting the
426 * blocks between fifo_end and fifo_beg.
429 vol_no
= HAMMER_VOL_DECODE(fifo_end
);
431 if (vol_no
== HAMMER_VOL_DECODE(fifo_beg
) &&
432 fifo_end
<= fifo_beg
) {
433 bfree
+= (fifo_beg
- fifo_end
) & HAMMER_OFF_SHORT_MASK
;
436 volume
= hammer_get_volume(hmp
, vol_no
, &error
);
439 bfree
+= volume
->maxbuf_off
- fifo_end
;
440 if (++vol_no
== hmp
->nvolumes
)
442 fifo_end
= HAMMER_ENCODE_RAW_BUFFER(vol_no
, 0);
443 hammer_rel_volume(volume
, 0);
445 mp
->mnt_stat
.f_bfree
= bfree
/ HAMMER_BUFSIZE
;
446 mp
->mnt_stat
.f_bavail
= mp
->mnt_stat
.f_bfree
;
447 if (mp
->mnt_stat
.f_files
< 0)
448 mp
->mnt_stat
.f_files
= 0;
455 hammer_vfs_sync(struct mount
*mp
, int waitfor
)
457 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
460 error
= hammer_sync_hmp(hmp
, waitfor
);
465 * Convert a vnode to a file handle.
468 hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
)
472 KKASSERT(MAXFIDSZ
>= 16);
474 fhp
->fid_len
= offsetof(struct fid
, fid_data
[16]);
475 fhp
->fid_reserved
= 0;
476 bcopy(&ip
->obj_id
, fhp
->fid_data
+ 0, sizeof(ip
->obj_id
));
477 bcopy(&ip
->obj_asof
, fhp
->fid_data
+ 8, sizeof(ip
->obj_asof
));
483 * Convert a file handle back to a vnode.
486 hammer_vfs_fhtovp(struct mount
*mp
, struct fid
*fhp
, struct vnode
**vpp
)
488 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
489 struct hammer_inode
*ip
;
490 struct hammer_inode_info info
;
493 bcopy(fhp
->fid_data
+ 0, &info
.obj_id
, sizeof(info
.obj_id
));
494 bcopy(fhp
->fid_data
+ 8, &info
.obj_asof
, sizeof(info
.obj_asof
));
497 * Get/allocate the hammer_inode structure. The structure must be
498 * unlocked while we manipulate the related vnode to avoid a
501 ip
= hammer_get_inode(hmp
, NULL
, info
.obj_id
, info
.obj_asof
, 0, &error
);
506 error
= hammer_get_vnode(ip
, LK_EXCLUSIVE
, vpp
);
507 hammer_rel_inode(ip
, 0);
512 hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
513 int *exflagsp
, struct ucred
**credanonp
)
515 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
519 np
= vfs_export_lookup(mp
, &hmp
->export
, nam
);
521 *exflagsp
= np
->netc_exflags
;
522 *credanonp
= &np
->netc_anon
;
532 hammer_vfs_export(struct mount
*mp
, int op
, const struct export_args
*export
)
534 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
538 case MOUNTCTL_SET_EXPORT
:
539 error
= vfs_export(mp
, &hmp
->export
, export
);