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 1.17 2008/02/05 20:52:01 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_supercls
;
60 int hammer_count_clusters
;
61 int hammer_count_buffers
;
62 int hammer_count_nodes
;
63 int hammer_count_spikes
;
65 SYSCTL_NODE(_vfs
, OID_AUTO
, hammer
, CTLFLAG_RW
, 0, "HAMMER filesystem");
66 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_general
, CTLFLAG_RW
,
67 &hammer_debug_general
, 0, "");
68 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_btree
, CTLFLAG_RW
,
69 &hammer_debug_btree
, 0, "");
70 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_tid
, CTLFLAG_RW
,
71 &hammer_debug_tid
, 0, "");
72 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover
, CTLFLAG_RW
,
73 &hammer_debug_recover
, 0, "");
74 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover_faults
, CTLFLAG_RW
,
75 &hammer_debug_recover_faults
, 0, "");
76 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_inodes
, CTLFLAG_RD
,
77 &hammer_count_inodes
, 0, "");
78 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_records
, CTLFLAG_RD
,
79 &hammer_count_records
, 0, "");
80 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_record_datas
, CTLFLAG_RD
,
81 &hammer_count_record_datas
, 0, "");
82 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_volumes
, CTLFLAG_RD
,
83 &hammer_count_volumes
, 0, "");
84 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_supercls
, CTLFLAG_RD
,
85 &hammer_count_supercls
, 0, "");
86 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_clusters
, CTLFLAG_RD
,
87 &hammer_count_clusters
, 0, "");
88 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_buffers
, CTLFLAG_RD
,
89 &hammer_count_buffers
, 0, "");
90 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_nodes
, CTLFLAG_RD
,
91 &hammer_count_nodes
, 0, "");
92 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_spikes
, CTLFLAG_RD
,
93 &hammer_count_spikes
, 0, "");
98 static void hammer_free_hmp(struct mount
*mp
);
100 static int hammer_vfs_mount(struct mount
*mp
, char *path
, caddr_t data
,
102 static int hammer_vfs_unmount(struct mount
*mp
, int mntflags
);
103 static int hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
);
104 static int hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
,
106 static int hammer_vfs_sync(struct mount
*mp
, int waitfor
);
107 static int hammer_vfs_vget(struct mount
*mp
, ino_t ino
,
109 static int hammer_vfs_init(struct vfsconf
*conf
);
110 static int hammer_vfs_fhtovp(struct mount
*mp
, struct fid
*fhp
,
112 static int hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
);
113 static int hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
114 int *exflagsp
, struct ucred
**credanonp
);
117 static struct vfsops hammer_vfsops
= {
118 .vfs_mount
= hammer_vfs_mount
,
119 .vfs_unmount
= hammer_vfs_unmount
,
120 .vfs_root
= hammer_vfs_root
,
121 .vfs_statfs
= hammer_vfs_statfs
,
122 .vfs_sync
= hammer_vfs_sync
,
123 .vfs_vget
= hammer_vfs_vget
,
124 .vfs_init
= hammer_vfs_init
,
125 .vfs_vptofh
= hammer_vfs_vptofh
,
126 .vfs_fhtovp
= hammer_vfs_fhtovp
,
127 .vfs_checkexp
= hammer_vfs_checkexp
130 MALLOC_DEFINE(M_HAMMER
, "hammer-mount", "hammer mount");
132 VFS_SET(hammer_vfsops
, hammer
, 0);
133 MODULE_VERSION(hammer
, 1);
136 hammer_vfs_init(struct vfsconf
*conf
)
138 hammer_init_alist_config();
143 hammer_vfs_mount(struct mount
*mp
, char *mntpt
, caddr_t data
,
146 struct hammer_mount_info info
;
148 hammer_volume_t rootvol
;
149 struct vnode
*rootvp
;
150 const char *upath
; /* volume name in userspace */
151 char *path
; /* volume name in system space */
155 if ((error
= copyin(data
, &info
, sizeof(info
))) != 0)
157 if (info
.nvolumes
<= 0 || info
.nvolumes
>= 32768)
161 * Interal mount data structure
163 if (mp
->mnt_flag
& MNT_UPDATE
) {
164 hmp
= (void *)mp
->mnt_data
;
165 KKASSERT(hmp
!= NULL
);
167 hmp
= kmalloc(sizeof(*hmp
), M_HAMMER
, M_WAITOK
| M_ZERO
);
168 mp
->mnt_data
= (qaddr_t
)hmp
;
170 hmp
->zbuf
= kmalloc(HAMMER_BUFSIZE
, M_HAMMER
, M_WAITOK
|M_ZERO
);
171 hmp
->namekey_iterator
= mycpu
->gd_time_seconds
;
172 /*TAILQ_INIT(&hmp->recycle_list);*/
174 hmp
->hflags
= info
.hflags
;
176 mp
->mnt_flag
|= MNT_RDONLY
;
177 hmp
->asof
= info
.asof
;
179 hmp
->asof
= HAMMER_MAX_TID
;
183 * Re-open read-write if originally read-only, or vise-versa XXX
185 if (mp
->mnt_flag
& MNT_UPDATE
) {
186 if (hmp
->ronly
== 0 && (mp
->mnt_flag
& MNT_RDONLY
)) {
187 kprintf("HAMMER read-write -> read-only XXX\n");
189 } else if (hmp
->ronly
&& (mp
->mnt_flag
& MNT_RDONLY
) == 0) {
190 kprintf("HAMMER read-only -> read-write XXX\n");
196 RB_INIT(&hmp
->rb_vols_root
);
197 RB_INIT(&hmp
->rb_inos_root
);
198 hmp
->ronly
= ((mp
->mnt_flag
& MNT_RDONLY
) != 0);
203 path
= objcache_get(namei_oc
, M_WAITOK
);
204 hmp
->nvolumes
= info
.nvolumes
;
205 for (i
= 0; i
< info
.nvolumes
; ++i
) {
206 error
= copyin(&info
.volumes
[i
], &upath
, sizeof(char *));
208 error
= copyinstr(upath
, path
, MAXPATHLEN
, NULL
);
210 error
= hammer_install_volume(hmp
, path
);
214 objcache_put(namei_oc
, path
);
217 * Make sure we found a root volume
219 if (error
== 0 && hmp
->rootvol
== NULL
) {
220 kprintf("hammer_mount: No root volume found!\n");
223 if (error
== 0 && hmp
->rootcl
== NULL
) {
224 kprintf("hammer_mount: No root cluster found!\n");
233 * No errors, setup enough of the mount point so we can lookup the
236 mp
->mnt_iosize_max
= MAXPHYS
;
237 mp
->mnt_kern_flag
|= MNTK_FSMID
;
240 * note: f_iosize is used by vnode_pager_haspage() when constructing
243 mp
->mnt_stat
.f_iosize
= HAMMER_BUFSIZE
;
244 mp
->mnt_stat
.f_bsize
= HAMMER_BUFSIZE
;
245 mp
->mnt_maxsymlinklen
= 255;
246 mp
->mnt_flag
|= MNT_LOCAL
;
248 vfs_add_vnodeops(mp
, &hammer_vnode_vops
, &mp
->mnt_vn_norm_ops
);
249 vfs_add_vnodeops(mp
, &hammer_spec_vops
, &mp
->mnt_vn_spec_ops
);
250 vfs_add_vnodeops(mp
, &hammer_fifo_vops
, &mp
->mnt_vn_fifo_ops
);
253 * The root volume's ondisk pointer is only valid if we hold a
256 rootvol
= hammer_get_root_volume(hmp
, &error
);
259 ksnprintf(mp
->mnt_stat
.f_mntfromname
,
260 sizeof(mp
->mnt_stat
.f_mntfromname
), "%s",
261 rootvol
->ondisk
->vol_name
);
262 mp
->mnt_stat
.f_fsid
.val
[0] =
263 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 0, 8);
264 mp
->mnt_stat
.f_fsid
.val
[1] =
265 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 8, 8);
266 hammer_rel_volume(rootvol
, 0);
269 * Locate the root directory using the root cluster's B-Tree as a
270 * starting point. The root directory uses an obj_id of 1.
272 * FUTURE: Leave the root directory cached referenced but unlocked
273 * in hmp->rootvp (need to flush it on unmount).
275 error
= hammer_vfs_vget(mp
, 1, &rootvp
);
279 /*vn_unlock(hmp->rootvp);*/
283 * Cleanup and return.
291 hammer_vfs_unmount(struct mount
*mp
, int mntflags
)
294 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
300 * Clean out the vnodes
303 if (mntflags
& MNT_FORCE
)
305 if ((error
= vflush(mp
, 0, flags
)) != 0)
309 * Clean up the internal mount structure and related entities. This
317 * Clean up the internal mount structure and disassociate it from the mount.
318 * This may issue I/O.
321 hammer_free_hmp(struct mount
*mp
)
323 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
327 * Clean up the root vnode
336 * Unload & flush inodes
338 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
339 hammer_unload_inode
, (void *)MNT_WAIT
);
342 * Unload & flush volumes
344 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
345 hammer_unload_volume
, NULL
);
348 mp
->mnt_flag
&= ~MNT_LOCAL
;
350 kfree(hmp
->zbuf
, M_HAMMER
);
351 kfree(hmp
, M_HAMMER
);
355 * Obtain a vnode for the specified inode number. An exclusively locked
359 hammer_vfs_vget(struct mount
*mp
, ino_t ino
, struct vnode
**vpp
)
361 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
362 struct hammer_inode
*ip
;
366 * Get/allocate the hammer_inode structure. The structure must be
367 * unlocked while we manipulate the related vnode to avoid a
370 ip
= hammer_get_inode(hmp
, NULL
, ino
, hmp
->asof
, 0, &error
);
375 error
= hammer_get_vnode(ip
, LK_EXCLUSIVE
, vpp
);
376 hammer_rel_inode(ip
, 0);
381 * Return the root vnode for the filesystem.
383 * HAMMER stores the root vnode in the hammer_mount structure so
384 * getting it is easy.
387 hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
)
389 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
392 if (hmp
->rootcl
== NULL
)
395 error
= hammer_vfs_vget(mp
, 1, vpp
);
398 /* FUTURE - cached root vnode */
399 if ((vp
= hmp
->rootvp
) != NULL
) {
401 vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
);
412 hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
, struct ucred
*cred
)
414 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
415 hammer_volume_t volume
;
416 hammer_volume_ondisk_t ondisk
;
419 volume
= hammer_get_root_volume(hmp
, &error
);
423 ondisk
= volume
->ondisk
;
425 mp
->mnt_stat
.f_bfree
= mp
->mnt_stat
.f_blocks
-
426 ondisk
->vol0_stat_idx_bufs
-
427 ondisk
->vol0_stat_rec_bufs
-
428 ondisk
->vol0_stat_data_bufs
;
429 if (mp
->mnt_stat
.f_bfree
< 0)
430 mp
->mnt_stat
.f_bfree
= 0;
431 mp
->mnt_stat
.f_bavail
= mp
->mnt_stat
.f_bfree
;
432 mp
->mnt_stat
.f_files
= ondisk
->vol0_stat_inodes
;
433 if (mp
->mnt_stat
.f_files
< 0)
434 mp
->mnt_stat
.f_files
= 0;
436 hammer_rel_volume(volume
, 0);
442 hammer_vfs_sync(struct mount
*mp
, int waitfor
)
444 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
447 error
= hammer_sync_hmp(hmp
, waitfor
);
452 * Convert a vnode to a file handle.
455 hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
)
459 KKASSERT(MAXFIDSZ
>= 16);
461 fhp
->fid_len
= offsetof(struct fid
, fid_data
[16]);
462 fhp
->fid_reserved
= 0;
463 bcopy(&ip
->obj_id
, fhp
->fid_data
+ 0, sizeof(ip
->obj_id
));
464 bcopy(&ip
->obj_asof
, fhp
->fid_data
+ 8, sizeof(ip
->obj_asof
));
470 * Convert a file handle back to a vnode.
473 hammer_vfs_fhtovp(struct mount
*mp
, struct fid
*fhp
, struct vnode
**vpp
)
475 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
476 struct hammer_inode
*ip
;
477 struct hammer_inode_info info
;
480 bcopy(fhp
->fid_data
+ 0, &info
.obj_id
, sizeof(info
.obj_id
));
481 bcopy(fhp
->fid_data
+ 8, &info
.obj_asof
, sizeof(info
.obj_asof
));
484 * Get/allocate the hammer_inode structure. The structure must be
485 * unlocked while we manipulate the related vnode to avoid a
488 ip
= hammer_get_inode(hmp
, NULL
, info
.obj_id
, info
.obj_asof
, 0, &error
);
493 error
= hammer_get_vnode(ip
, LK_EXCLUSIVE
, vpp
);
494 hammer_rel_inode(ip
, 0);
499 hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
500 int *exflagsp
, struct ucred
**credanonp
)
502 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
506 np
= vfs_export_lookup(mp
, &hmp
->export
, nam
);
508 *exflagsp
= np
->netc_exflags
;
509 *credanonp
= &np
->netc_anon
;
519 hammer_vfs_export(struct mount
*mp
, int op
, const struct export_args
*export
)
521 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
525 case MOUNTCTL_SET_EXPORT
:
526 error
= vfs_export(mp
, &hmp
->export
, export
);