2 * Copyright (c) 2007-2008 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 1.74 2008/11/13 02:18:43 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_supported_version
= HAMMER_VOL_VERSION_DEFAULT
;
52 int hammer_debug_general
;
53 int hammer_debug_debug
= 1; /* medium-error panics */
54 int hammer_debug_inode
;
55 int hammer_debug_locks
;
56 int hammer_debug_btree
;
58 int hammer_debug_recover
; /* -1 will disable, +1 will force */
59 int hammer_debug_recover_faults
;
60 int hammer_debug_critical
; /* non-zero enter debugger on error */
61 int hammer_cluster_enable
= 1; /* enable read clustering by default */
62 int hammer_count_fsyncs
;
63 int hammer_count_inodes
;
64 int hammer_count_iqueued
;
65 int hammer_count_reclaiming
;
66 int hammer_count_records
;
67 int hammer_count_record_datas
;
68 int hammer_count_volumes
;
69 int hammer_count_buffers
;
70 int hammer_count_nodes
;
71 int64_t hammer_count_extra_space_used
;
72 int64_t hammer_stats_btree_lookups
;
73 int64_t hammer_stats_btree_searches
;
74 int64_t hammer_stats_btree_inserts
;
75 int64_t hammer_stats_btree_deletes
;
76 int64_t hammer_stats_btree_elements
;
77 int64_t hammer_stats_btree_splits
;
78 int64_t hammer_stats_btree_iterations
;
79 int64_t hammer_stats_btree_root_iterations
;
80 int64_t hammer_stats_record_iterations
;
82 int64_t hammer_stats_file_read
;
83 int64_t hammer_stats_file_write
;
84 int64_t hammer_stats_file_iopsr
;
85 int64_t hammer_stats_file_iopsw
;
86 int64_t hammer_stats_disk_read
;
87 int64_t hammer_stats_disk_write
;
88 int64_t hammer_stats_inode_flushes
;
89 int64_t hammer_stats_commits
;
90 int64_t hammer_stats_undo
;
92 int hammer_count_dirtybufspace
; /* global */
93 int hammer_count_refedbufs
; /* global */
94 int hammer_count_reservations
;
95 int hammer_count_io_running_read
;
96 int hammer_count_io_running_write
;
97 int hammer_count_io_locked
;
98 int hammer_limit_dirtybufspace
; /* per-mount */
99 int hammer_limit_recs
; /* as a whole XXX */
100 int hammer_limit_inode_recs
= 1024; /* per inode */
101 int hammer_limit_reclaim
= HAMMER_RECLAIM_WAIT
;
102 int hammer_autoflush
= 2000; /* auto flush */
103 int hammer_bio_count
;
104 int hammer_verify_zone
;
105 int hammer_verify_data
= 1;
106 int hammer_write_mode
;
107 int hammer_yield_check
= 16;
108 int hammer_fsync_mode
;
109 int64_t hammer_contention_count
;
110 int64_t hammer_zone_limit
;
112 SYSCTL_NODE(_vfs
, OID_AUTO
, hammer
, CTLFLAG_RW
, 0, "HAMMER filesystem");
113 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, supported_version
, CTLFLAG_RD
,
114 &hammer_supported_version
, 0, "");
115 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_general
, CTLFLAG_RW
,
116 &hammer_debug_general
, 0, "");
117 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_io
, CTLFLAG_RW
,
118 &hammer_debug_io
, 0, "");
119 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_debug
, CTLFLAG_RW
,
120 &hammer_debug_debug
, 0, "");
121 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_inode
, CTLFLAG_RW
,
122 &hammer_debug_inode
, 0, "");
123 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_locks
, CTLFLAG_RW
,
124 &hammer_debug_locks
, 0, "");
125 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_btree
, CTLFLAG_RW
,
126 &hammer_debug_btree
, 0, "");
127 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_tid
, CTLFLAG_RW
,
128 &hammer_debug_tid
, 0, "");
129 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover
, CTLFLAG_RW
,
130 &hammer_debug_recover
, 0, "");
131 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover_faults
, CTLFLAG_RW
,
132 &hammer_debug_recover_faults
, 0, "");
133 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_critical
, CTLFLAG_RW
,
134 &hammer_debug_critical
, 0, "");
135 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, cluster_enable
, CTLFLAG_RW
,
136 &hammer_cluster_enable
, 0, "");
138 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_dirtybufspace
, CTLFLAG_RW
,
139 &hammer_limit_dirtybufspace
, 0, "");
140 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_recs
, CTLFLAG_RW
,
141 &hammer_limit_recs
, 0, "");
142 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_inode_recs
, CTLFLAG_RW
,
143 &hammer_limit_inode_recs
, 0, "");
144 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_reclaim
, CTLFLAG_RW
,
145 &hammer_limit_reclaim
, 0, "");
147 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_fsyncs
, CTLFLAG_RD
,
148 &hammer_count_fsyncs
, 0, "");
149 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_inodes
, CTLFLAG_RD
,
150 &hammer_count_inodes
, 0, "");
151 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_iqueued
, CTLFLAG_RD
,
152 &hammer_count_iqueued
, 0, "");
153 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_reclaiming
, CTLFLAG_RD
,
154 &hammer_count_reclaiming
, 0, "");
155 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_records
, CTLFLAG_RD
,
156 &hammer_count_records
, 0, "");
157 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_record_datas
, CTLFLAG_RD
,
158 &hammer_count_record_datas
, 0, "");
159 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_volumes
, CTLFLAG_RD
,
160 &hammer_count_volumes
, 0, "");
161 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_buffers
, CTLFLAG_RD
,
162 &hammer_count_buffers
, 0, "");
163 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_nodes
, CTLFLAG_RD
,
164 &hammer_count_nodes
, 0, "");
165 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, count_extra_space_used
, CTLFLAG_RD
,
166 &hammer_count_extra_space_used
, 0, "");
168 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_searches
, CTLFLAG_RD
,
169 &hammer_stats_btree_searches
, 0, "");
170 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_lookups
, CTLFLAG_RD
,
171 &hammer_stats_btree_lookups
, 0, "");
172 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_inserts
, CTLFLAG_RD
,
173 &hammer_stats_btree_inserts
, 0, "");
174 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_deletes
, CTLFLAG_RD
,
175 &hammer_stats_btree_deletes
, 0, "");
176 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_elements
, CTLFLAG_RD
,
177 &hammer_stats_btree_elements
, 0, "");
178 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_splits
, CTLFLAG_RD
,
179 &hammer_stats_btree_splits
, 0, "");
180 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_iterations
, CTLFLAG_RD
,
181 &hammer_stats_btree_iterations
, 0, "");
182 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_root_iterations
, CTLFLAG_RD
,
183 &hammer_stats_btree_root_iterations
, 0, "");
184 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_record_iterations
, CTLFLAG_RD
,
185 &hammer_stats_record_iterations
, 0, "");
187 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_read
, CTLFLAG_RD
,
188 &hammer_stats_file_read
, 0, "");
189 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_write
, CTLFLAG_RD
,
190 &hammer_stats_file_write
, 0, "");
191 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_iopsr
, CTLFLAG_RD
,
192 &hammer_stats_file_iopsr
, 0, "");
193 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_iopsw
, CTLFLAG_RD
,
194 &hammer_stats_file_iopsw
, 0, "");
195 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_disk_read
, CTLFLAG_RD
,
196 &hammer_stats_disk_read
, 0, "");
197 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_disk_write
, CTLFLAG_RD
,
198 &hammer_stats_disk_write
, 0, "");
199 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_inode_flushes
, CTLFLAG_RD
,
200 &hammer_stats_inode_flushes
, 0, "");
201 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_commits
, CTLFLAG_RD
,
202 &hammer_stats_commits
, 0, "");
203 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_undo
, CTLFLAG_RD
,
204 &hammer_stats_undo
, 0, "");
206 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_dirtybufspace
, CTLFLAG_RD
,
207 &hammer_count_dirtybufspace
, 0, "");
208 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_refedbufs
, CTLFLAG_RD
,
209 &hammer_count_refedbufs
, 0, "");
210 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_reservations
, CTLFLAG_RD
,
211 &hammer_count_reservations
, 0, "");
212 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_io_running_read
, CTLFLAG_RD
,
213 &hammer_count_io_running_read
, 0, "");
214 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_io_locked
, CTLFLAG_RD
,
215 &hammer_count_io_locked
, 0, "");
216 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_io_running_write
, CTLFLAG_RD
,
217 &hammer_count_io_running_write
, 0, "");
218 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, zone_limit
, CTLFLAG_RW
,
219 &hammer_zone_limit
, 0, "");
220 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, contention_count
, CTLFLAG_RW
,
221 &hammer_contention_count
, 0, "");
222 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, autoflush
, CTLFLAG_RW
,
223 &hammer_autoflush
, 0, "");
224 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, verify_zone
, CTLFLAG_RW
,
225 &hammer_verify_zone
, 0, "");
226 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, verify_data
, CTLFLAG_RW
,
227 &hammer_verify_data
, 0, "");
228 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, write_mode
, CTLFLAG_RW
,
229 &hammer_write_mode
, 0, "");
230 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, yield_check
, CTLFLAG_RW
,
231 &hammer_yield_check
, 0, "");
232 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, fsync_mode
, CTLFLAG_RW
,
233 &hammer_fsync_mode
, 0, "");
235 KTR_INFO_MASTER(hammer
);
240 static void hammer_free_hmp(struct mount
*mp
);
242 static int hammer_vfs_mount(struct mount
*mp
, char *path
, caddr_t data
,
244 static int hammer_vfs_unmount(struct mount
*mp
, int mntflags
);
245 static int hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
);
246 static int hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
,
248 static int hammer_vfs_statvfs(struct mount
*mp
, struct statvfs
*sbp
,
250 static int hammer_vfs_sync(struct mount
*mp
, int waitfor
);
251 static int hammer_vfs_vget(struct mount
*mp
, struct vnode
*dvp
,
252 ino_t ino
, struct vnode
**vpp
);
253 static int hammer_vfs_init(struct vfsconf
*conf
);
254 static int hammer_vfs_fhtovp(struct mount
*mp
, struct vnode
*rootvp
,
255 struct fid
*fhp
, struct vnode
**vpp
);
256 static int hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
);
257 static int hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
258 int *exflagsp
, struct ucred
**credanonp
);
261 static struct vfsops hammer_vfsops
= {
262 .vfs_mount
= hammer_vfs_mount
,
263 .vfs_unmount
= hammer_vfs_unmount
,
264 .vfs_root
= hammer_vfs_root
,
265 .vfs_statfs
= hammer_vfs_statfs
,
266 .vfs_statvfs
= hammer_vfs_statvfs
,
267 .vfs_sync
= hammer_vfs_sync
,
268 .vfs_vget
= hammer_vfs_vget
,
269 .vfs_init
= hammer_vfs_init
,
270 .vfs_vptofh
= hammer_vfs_vptofh
,
271 .vfs_fhtovp
= hammer_vfs_fhtovp
,
272 .vfs_checkexp
= hammer_vfs_checkexp
275 MALLOC_DEFINE(M_HAMMER
, "HAMMER-mount", "");
277 VFS_SET(hammer_vfsops
, hammer
, 0);
278 MODULE_VERSION(hammer
, 1);
281 hammer_vfs_init(struct vfsconf
*conf
)
285 if (hammer_limit_recs
== 0) {
286 hammer_limit_recs
= nbuf
* 25;
287 n
= kmalloc_limit(M_HAMMER
) / 512;
288 if (hammer_limit_recs
> n
)
289 hammer_limit_recs
= n
;
291 if (hammer_limit_dirtybufspace
== 0) {
292 hammer_limit_dirtybufspace
= hidirtybufspace
/ 2;
293 if (hammer_limit_dirtybufspace
< 100)
294 hammer_limit_dirtybufspace
= 100;
300 hammer_vfs_mount(struct mount
*mp
, char *mntpt
, caddr_t data
,
303 struct hammer_mount_info info
;
305 hammer_volume_t rootvol
;
306 struct vnode
*rootvp
;
307 struct vnode
*devvp
= NULL
;
308 const char *upath
; /* volume name in userspace */
309 char *path
; /* volume name in system space */
314 char *next_volume_ptr
= NULL
;
317 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot.
320 bzero(&info
, sizeof(info
));
325 next_volume_ptr
= mp
->mnt_stat
.f_mntfromname
;
327 /* Count number of volumes separated by ':' */
328 for (char *p
= next_volume_ptr
; *p
!= '\0'; ++p
) {
334 mp
->mnt_flag
&= ~MNT_RDONLY
; /* mount R/W */
336 if ((error
= copyin(data
, &info
, sizeof(info
))) != 0)
341 * updating or new mount
343 if (mp
->mnt_flag
& MNT_UPDATE
) {
344 hmp
= (void *)mp
->mnt_data
;
345 KKASSERT(hmp
!= NULL
);
347 if (info
.nvolumes
<= 0 || info
.nvolumes
>= 32768)
353 * master-id validation. The master id may not be changed by a
356 if (info
.hflags
& HMNT_MASTERID
) {
357 if (hmp
&& hmp
->master_id
!= info
.master_id
) {
358 kprintf("hammer: cannot change master id "
359 "with mount update\n");
362 master_id
= info
.master_id
;
363 if (master_id
< -1 || master_id
>= HAMMER_MAX_MASTERS
)
367 master_id
= hmp
->master_id
;
373 * Interal mount data structure
376 hmp
= kmalloc(sizeof(*hmp
), M_HAMMER
, M_WAITOK
| M_ZERO
);
377 mp
->mnt_data
= (qaddr_t
)hmp
;
379 /*TAILQ_INIT(&hmp->recycle_list);*/
382 * Make sure kmalloc type limits are set appropriately. If root
383 * increases the vnode limit you may have to do a dummy remount
384 * to adjust the HAMMER inode limit.
386 kmalloc_create(&hmp
->m_misc
, "HAMMER-others");
387 kmalloc_create(&hmp
->m_inodes
, "HAMMER-inodes");
389 maxinodes
= desiredvnodes
+ desiredvnodes
/ 5 +
390 hammer_limit_reclaim
* 2;
391 kmalloc_raise_limit(hmp
->m_inodes
,
392 maxinodes
* sizeof(struct hammer_inode
));
394 hmp
->root_btree_beg
.localization
= 0x00000000U
;
395 hmp
->root_btree_beg
.obj_id
= -0x8000000000000000LL
;
396 hmp
->root_btree_beg
.key
= -0x8000000000000000LL
;
397 hmp
->root_btree_beg
.create_tid
= 1;
398 hmp
->root_btree_beg
.delete_tid
= 1;
399 hmp
->root_btree_beg
.rec_type
= 0;
400 hmp
->root_btree_beg
.obj_type
= 0;
402 hmp
->root_btree_end
.localization
= 0xFFFFFFFFU
;
403 hmp
->root_btree_end
.obj_id
= 0x7FFFFFFFFFFFFFFFLL
;
404 hmp
->root_btree_end
.key
= 0x7FFFFFFFFFFFFFFFLL
;
405 hmp
->root_btree_end
.create_tid
= 0xFFFFFFFFFFFFFFFFULL
;
406 hmp
->root_btree_end
.delete_tid
= 0; /* special case */
407 hmp
->root_btree_end
.rec_type
= 0xFFFFU
;
408 hmp
->root_btree_end
.obj_type
= 0;
410 hmp
->krate
.freq
= 1; /* maximum reporting rate (hz) */
411 hmp
->krate
.count
= -16; /* initial burst */
413 hmp
->sync_lock
.refs
= 1;
414 hmp
->free_lock
.refs
= 1;
415 hmp
->undo_lock
.refs
= 1;
416 hmp
->blkmap_lock
.refs
= 1;
417 hmp
->snapshot_lock
.refs
= 1;
419 TAILQ_INIT(&hmp
->delay_list
);
420 TAILQ_INIT(&hmp
->flush_group_list
);
421 TAILQ_INIT(&hmp
->objid_cache_list
);
422 TAILQ_INIT(&hmp
->undo_lru_list
);
423 TAILQ_INIT(&hmp
->reclaim_list
);
425 hmp
->hflags
&= ~HMNT_USERFLAGS
;
426 hmp
->hflags
|= info
.hflags
& HMNT_USERFLAGS
;
428 hmp
->master_id
= master_id
;
431 mp
->mnt_flag
|= MNT_RDONLY
;
432 hmp
->asof
= info
.asof
;
434 hmp
->asof
= HAMMER_MAX_TID
;
437 hmp
->volume_to_remove
= -1;
440 * Re-open read-write if originally read-only, or vise-versa.
442 * When going from read-only to read-write execute the stage2
443 * recovery if it has not already been run.
445 if (mp
->mnt_flag
& MNT_UPDATE
) {
447 if (hmp
->ronly
&& (mp
->mnt_kern_flag
& MNTK_WANTRDWR
)) {
448 kprintf("HAMMER read-only -> read-write\n");
450 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
451 hammer_adjust_volume_mode
, NULL
);
452 rootvol
= hammer_get_root_volume(hmp
, &error
);
454 hammer_recover_flush_buffers(hmp
, rootvol
, 1);
455 error
= hammer_recover_stage2(hmp
, rootvol
);
456 bcopy(rootvol
->ondisk
->vol0_blockmap
,
458 sizeof(hmp
->blockmap
));
459 hammer_rel_volume(rootvol
, 0);
461 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
462 hammer_reload_inode
, NULL
);
463 /* kernel clears MNT_RDONLY */
464 } else if (hmp
->ronly
== 0 && (mp
->mnt_flag
& MNT_RDONLY
)) {
465 kprintf("HAMMER read-write -> read-only\n");
466 hmp
->ronly
= 1; /* messy */
467 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
468 hammer_reload_inode
, NULL
);
470 hammer_flusher_sync(hmp
);
471 hammer_flusher_sync(hmp
);
472 hammer_flusher_sync(hmp
);
474 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
475 hammer_adjust_volume_mode
, NULL
);
480 RB_INIT(&hmp
->rb_vols_root
);
481 RB_INIT(&hmp
->rb_inos_root
);
482 RB_INIT(&hmp
->rb_nods_root
);
483 RB_INIT(&hmp
->rb_undo_root
);
484 RB_INIT(&hmp
->rb_resv_root
);
485 RB_INIT(&hmp
->rb_bufs_root
);
486 RB_INIT(&hmp
->rb_pfsm_root
);
488 hmp
->ronly
= ((mp
->mnt_flag
& MNT_RDONLY
) != 0);
490 TAILQ_INIT(&hmp
->volu_list
);
491 TAILQ_INIT(&hmp
->undo_list
);
492 TAILQ_INIT(&hmp
->data_list
);
493 TAILQ_INIT(&hmp
->meta_list
);
494 TAILQ_INIT(&hmp
->lose_list
);
499 path
= objcache_get(namei_oc
, M_WAITOK
);
501 for (i
= 0; i
< info
.nvolumes
; ++i
) {
506 KKASSERT(next_volume_ptr
!= NULL
);
507 strcpy(path
, "/dev/");
509 for (k
= strlen(path
); k
< MAXPATHLEN
-1; ++k
) {
510 if (*next_volume_ptr
== '\0') {
512 } else if (*next_volume_ptr
== ':') {
516 path
[k
] = *next_volume_ptr
;
523 cdev_t dev
= kgetdiskbyname(path
);
524 error
= bdevvp(dev
, &devvp
);
526 kprintf("hammer_mountroot: can't find devvp\n");
529 error
= copyin(&info
.volumes
[i
], &upath
,
532 error
= copyinstr(upath
, path
,
536 error
= hammer_install_volume(hmp
, path
, devvp
);
540 objcache_put(namei_oc
, path
);
543 * Make sure we found a root volume
545 if (error
== 0 && hmp
->rootvol
== NULL
) {
546 kprintf("hammer_mount: No root volume found!\n");
551 * Check that all required volumes are available
553 if (error
== 0 && hammer_mountcheck_volumes(hmp
)) {
554 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
564 * No errors, setup enough of the mount point so we can lookup the
567 mp
->mnt_iosize_max
= MAXPHYS
;
568 mp
->mnt_kern_flag
|= MNTK_FSMID
;
571 * note: f_iosize is used by vnode_pager_haspage() when constructing
574 mp
->mnt_stat
.f_iosize
= HAMMER_BUFSIZE
;
575 mp
->mnt_stat
.f_bsize
= HAMMER_BUFSIZE
;
577 mp
->mnt_vstat
.f_frsize
= HAMMER_BUFSIZE
;
578 mp
->mnt_vstat
.f_bsize
= HAMMER_BUFSIZE
;
580 mp
->mnt_maxsymlinklen
= 255;
581 mp
->mnt_flag
|= MNT_LOCAL
;
583 vfs_add_vnodeops(mp
, &hammer_vnode_vops
, &mp
->mnt_vn_norm_ops
);
584 vfs_add_vnodeops(mp
, &hammer_spec_vops
, &mp
->mnt_vn_spec_ops
);
585 vfs_add_vnodeops(mp
, &hammer_fifo_vops
, &mp
->mnt_vn_fifo_ops
);
588 * The root volume's ondisk pointer is only valid if we hold a
591 rootvol
= hammer_get_root_volume(hmp
, &error
);
596 * Perform any necessary UNDO operations. The recovery code does
597 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
598 * and then re-copy it again after recovery is complete.
600 * If this is a read-only mount the UNDO information is retained
601 * in memory in the form of dirty buffer cache buffers, and not
602 * written back to the media.
604 bcopy(rootvol
->ondisk
->vol0_blockmap
, hmp
->blockmap
,
605 sizeof(hmp
->blockmap
));
608 * Check filesystem version
610 hmp
->version
= rootvol
->ondisk
->vol_version
;
611 if (hmp
->version
< HAMMER_VOL_VERSION_MIN
||
612 hmp
->version
> HAMMER_VOL_VERSION_MAX
) {
613 kprintf("HAMMER: mount unsupported fs version %d\n",
620 * The undo_rec_limit limits the size of flush groups to avoid
621 * blowing out the UNDO FIFO. This calculation is typically in
622 * the tens of thousands and is designed primarily when small
623 * HAMMER filesystems are created.
625 hmp
->undo_rec_limit
= hammer_undo_max(hmp
) / 8192 + 100;
626 if (hammer_debug_general
& 0x0001)
627 kprintf("HAMMER: undo_rec_limit %d\n", hmp
->undo_rec_limit
);
630 * NOTE: Recover stage1 not only handles meta-data recovery, it
631 * also sets hmp->undo_seqno for HAMMER VERSION 4+ filesystems.
633 error
= hammer_recover_stage1(hmp
, rootvol
);
635 kprintf("Failed to recover HAMMER filesystem on mount\n");
640 * Finish setup now that we have a good root volume.
642 * The top 16 bits of fsid.val[1] is a pfs id.
644 ksnprintf(mp
->mnt_stat
.f_mntfromname
,
645 sizeof(mp
->mnt_stat
.f_mntfromname
), "%s",
646 rootvol
->ondisk
->vol_name
);
647 mp
->mnt_stat
.f_fsid
.val
[0] =
648 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 0, 8);
649 mp
->mnt_stat
.f_fsid
.val
[1] =
650 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 8, 8);
651 mp
->mnt_stat
.f_fsid
.val
[1] &= 0x0000FFFF;
653 mp
->mnt_vstat
.f_fsid_uuid
= rootvol
->ondisk
->vol_fsid
;
654 mp
->mnt_vstat
.f_fsid
= crc32(&mp
->mnt_vstat
.f_fsid_uuid
,
655 sizeof(mp
->mnt_vstat
.f_fsid_uuid
));
658 * Certain often-modified fields in the root volume are cached in
659 * the hammer_mount structure so we do not have to generate lots
660 * of little UNDO structures for them.
662 * Recopy after recovery. This also has the side effect of
663 * setting our cached undo FIFO's first_offset, which serves to
664 * placemark the FIFO start for the NEXT flush cycle while the
665 * on-disk first_offset represents the LAST flush cycle.
667 hmp
->next_tid
= rootvol
->ondisk
->vol0_next_tid
;
668 hmp
->flush_tid1
= hmp
->next_tid
;
669 hmp
->flush_tid2
= hmp
->next_tid
;
670 bcopy(rootvol
->ondisk
->vol0_blockmap
, hmp
->blockmap
,
671 sizeof(hmp
->blockmap
));
672 hmp
->copy_stat_freebigblocks
= rootvol
->ondisk
->vol0_stat_freebigblocks
;
674 hammer_flusher_create(hmp
);
677 * Locate the root directory using the root cluster's B-Tree as a
678 * starting point. The root directory uses an obj_id of 1.
680 * FUTURE: Leave the root directory cached referenced but unlocked
681 * in hmp->rootvp (need to flush it on unmount).
683 error
= hammer_vfs_vget(mp
, NULL
, 1, &rootvp
);
687 /*vn_unlock(hmp->rootvp);*/
689 error
= hammer_recover_stage2(hmp
, rootvol
);
692 hammer_rel_volume(rootvol
, 0);
695 * Cleanup and return.
703 hammer_vfs_unmount(struct mount
*mp
, int mntflags
)
706 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
712 * Clean out the vnodes
715 if (mntflags
& MNT_FORCE
)
717 if ((error
= vflush(mp
, 0, flags
)) != 0)
721 * Clean up the internal mount structure and related entities. This
729 * Clean up the internal mount structure and disassociate it from the mount.
730 * This may issue I/O.
733 hammer_free_hmp(struct mount
*mp
)
735 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
736 hammer_flush_group_t flg
;
741 * Flush anything dirty. This won't even run if the
742 * filesystem errored-out.
745 while (hammer_flusher_haswork(hmp
)) {
746 hammer_flusher_sync(hmp
);
750 kprintf("HAMMER: umount flushing.");
753 tsleep(&dummy
, 0, "hmrufl", hz
);
756 kprintf("giving up\n");
760 if (count
>= 5 && count
< 30)
764 * If the mount had a critical error we have to destroy any
765 * remaining inodes before we can finish cleaning up the flusher.
767 if (hmp
->flags
& HAMMER_MOUNT_CRITICAL_ERROR
) {
768 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
769 hammer_destroy_inode_callback
, NULL
);
773 * There shouldn't be any inodes left now and any left over
774 * flush groups should now be empty.
776 KKASSERT(RB_EMPTY(&hmp
->rb_inos_root
));
777 while ((flg
= TAILQ_FIRST(&hmp
->flush_group_list
)) != NULL
) {
778 TAILQ_REMOVE(&hmp
->flush_group_list
, flg
, flush_entry
);
779 KKASSERT(RB_EMPTY(&flg
->flush_tree
));
781 kprintf("HAMMER: Warning, flush_group %p was "
782 "not empty on umount!\n", flg
);
784 kfree(flg
, hmp
->m_misc
);
788 * We can finally destroy the flusher
790 hammer_flusher_destroy(hmp
);
793 * We may have held recovered buffers due to a read-only mount.
794 * These must be discarded.
797 hammer_recover_flush_buffers(hmp
, NULL
, -1);
800 * Unload buffers and then volumes
802 RB_SCAN(hammer_buf_rb_tree
, &hmp
->rb_bufs_root
, NULL
,
803 hammer_unload_buffer
, NULL
);
804 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
805 hammer_unload_volume
, NULL
);
808 mp
->mnt_flag
&= ~MNT_LOCAL
;
810 hammer_destroy_objid_cache(hmp
);
811 kmalloc_destroy(&hmp
->m_misc
);
812 kmalloc_destroy(&hmp
->m_inodes
);
813 kfree(hmp
, M_HAMMER
);
817 * Report critical errors. ip may be NULL.
820 hammer_critical_error(hammer_mount_t hmp
, hammer_inode_t ip
,
821 int error
, const char *msg
)
823 hmp
->flags
|= HAMMER_MOUNT_CRITICAL_ERROR
;
825 krateprintf(&hmp
->krate
,
826 "HAMMER(%s): Critical error inode=%jd error=%d %s\n",
827 hmp
->mp
->mnt_stat
.f_mntfromname
,
828 (intmax_t)(ip
? ip
->obj_id
: -1),
831 if (hmp
->ronly
== 0) {
832 hmp
->ronly
= 2; /* special errored read-only mode */
833 hmp
->mp
->mnt_flag
|= MNT_RDONLY
;
834 kprintf("HAMMER(%s): Forcing read-only mode\n",
835 hmp
->mp
->mnt_stat
.f_mntfromname
);
838 if (hammer_debug_critical
)
839 Debugger("Entering debugger");
844 * Obtain a vnode for the specified inode number. An exclusively locked
848 hammer_vfs_vget(struct mount
*mp
, struct vnode
*dvp
,
849 ino_t ino
, struct vnode
**vpp
)
851 struct hammer_transaction trans
;
852 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
853 struct hammer_inode
*ip
;
855 u_int32_t localization
;
857 hammer_simple_transaction(&trans
, hmp
);
860 * If a directory vnode is supplied (mainly NFS) then we can acquire
861 * the PFS domain from it. Otherwise we would only be able to vget
862 * inodes in the root PFS.
865 localization
= HAMMER_DEF_LOCALIZATION
+
866 VTOI(dvp
)->obj_localization
;
868 localization
= HAMMER_DEF_LOCALIZATION
;
872 * Lookup the requested HAMMER inode. The structure must be
873 * left unlocked while we manipulate the related vnode to avoid
876 ip
= hammer_get_inode(&trans
, NULL
, ino
,
877 hmp
->asof
, localization
,
881 hammer_done_transaction(&trans
);
884 error
= hammer_get_vnode(ip
, vpp
);
885 hammer_rel_inode(ip
, 0);
886 hammer_done_transaction(&trans
);
891 * Return the root vnode for the filesystem.
893 * HAMMER stores the root vnode in the hammer_mount structure so
894 * getting it is easy.
897 hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
)
900 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
904 error
= hammer_vfs_vget(mp
, NULL
, 1, vpp
);
909 hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
, struct ucred
*cred
)
911 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
912 hammer_volume_t volume
;
913 hammer_volume_ondisk_t ondisk
;
918 volume
= hammer_get_root_volume(hmp
, &error
);
921 ondisk
= volume
->ondisk
;
926 _hammer_checkspace(hmp
, HAMMER_CHKSPC_WRITE
, &breserved
);
927 mp
->mnt_stat
.f_files
= ondisk
->vol0_stat_inodes
;
928 bfree
= ondisk
->vol0_stat_freebigblocks
* HAMMER_LARGEBLOCK_SIZE
;
929 hammer_rel_volume(volume
, 0);
931 mp
->mnt_stat
.f_bfree
= (bfree
- breserved
) / HAMMER_BUFSIZE
;
932 mp
->mnt_stat
.f_bavail
= mp
->mnt_stat
.f_bfree
;
933 if (mp
->mnt_stat
.f_files
< 0)
934 mp
->mnt_stat
.f_files
= 0;
941 hammer_vfs_statvfs(struct mount
*mp
, struct statvfs
*sbp
, struct ucred
*cred
)
943 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
944 hammer_volume_t volume
;
945 hammer_volume_ondisk_t ondisk
;
950 volume
= hammer_get_root_volume(hmp
, &error
);
953 ondisk
= volume
->ondisk
;
958 _hammer_checkspace(hmp
, HAMMER_CHKSPC_WRITE
, &breserved
);
959 mp
->mnt_vstat
.f_files
= ondisk
->vol0_stat_inodes
;
960 bfree
= ondisk
->vol0_stat_freebigblocks
* HAMMER_LARGEBLOCK_SIZE
;
961 hammer_rel_volume(volume
, 0);
963 mp
->mnt_vstat
.f_bfree
= (bfree
- breserved
) / HAMMER_BUFSIZE
;
964 mp
->mnt_vstat
.f_bavail
= mp
->mnt_vstat
.f_bfree
;
965 if (mp
->mnt_vstat
.f_files
< 0)
966 mp
->mnt_vstat
.f_files
= 0;
967 *sbp
= mp
->mnt_vstat
;
972 * Sync the filesystem. Currently we have to run it twice, the second
973 * one will advance the undo start index to the end index, so if a crash
974 * occurs no undos will be run on mount.
976 * We do not sync the filesystem if we are called from a panic. If we did
977 * we might end up blowing up a sync that was already in progress.
980 hammer_vfs_sync(struct mount
*mp
, int waitfor
)
982 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
985 if (panicstr
== NULL
) {
986 error
= hammer_sync_hmp(hmp
, waitfor
);
994 * Convert a vnode to a file handle.
997 hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
)
1001 KKASSERT(MAXFIDSZ
>= 16);
1003 fhp
->fid_len
= offsetof(struct fid
, fid_data
[16]);
1004 fhp
->fid_ext
= ip
->obj_localization
>> 16;
1005 bcopy(&ip
->obj_id
, fhp
->fid_data
+ 0, sizeof(ip
->obj_id
));
1006 bcopy(&ip
->obj_asof
, fhp
->fid_data
+ 8, sizeof(ip
->obj_asof
));
1012 * Convert a file handle back to a vnode.
1014 * Use rootvp to enforce PFS isolation when a PFS is exported via a
1018 hammer_vfs_fhtovp(struct mount
*mp
, struct vnode
*rootvp
,
1019 struct fid
*fhp
, struct vnode
**vpp
)
1021 struct hammer_transaction trans
;
1022 struct hammer_inode
*ip
;
1023 struct hammer_inode_info info
;
1025 u_int32_t localization
;
1027 bcopy(fhp
->fid_data
+ 0, &info
.obj_id
, sizeof(info
.obj_id
));
1028 bcopy(fhp
->fid_data
+ 8, &info
.obj_asof
, sizeof(info
.obj_asof
));
1030 localization
= VTOI(rootvp
)->obj_localization
;
1032 localization
= (u_int32_t
)fhp
->fid_ext
<< 16;
1034 hammer_simple_transaction(&trans
, (void *)mp
->mnt_data
);
1037 * Get/allocate the hammer_inode structure. The structure must be
1038 * unlocked while we manipulate the related vnode to avoid a
1041 ip
= hammer_get_inode(&trans
, NULL
, info
.obj_id
,
1042 info
.obj_asof
, localization
, 0, &error
);
1047 error
= hammer_get_vnode(ip
, vpp
);
1048 hammer_rel_inode(ip
, 0);
1049 hammer_done_transaction(&trans
);
1054 hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
1055 int *exflagsp
, struct ucred
**credanonp
)
1057 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
1061 np
= vfs_export_lookup(mp
, &hmp
->export
, nam
);
1063 *exflagsp
= np
->netc_exflags
;
1064 *credanonp
= &np
->netc_anon
;
1074 hammer_vfs_export(struct mount
*mp
, int op
, const struct export_args
*export
)
1076 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
1080 case MOUNTCTL_SET_EXPORT
:
1081 error
= vfs_export(mp
, &hmp
->export
, export
);