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>
51 * NOTE! Global statistics may not be MPSAFE so HAMMER never uses them
54 int hammer_supported_version
= HAMMER_VOL_VERSION_DEFAULT
;
56 int hammer_debug_general
;
57 int hammer_debug_debug
= 1; /* medium-error panics */
58 int hammer_debug_inode
;
59 int hammer_debug_locks
;
60 int hammer_debug_btree
;
62 int hammer_debug_recover
; /* -1 will disable, +1 will force */
63 int hammer_debug_recover_faults
;
64 int hammer_debug_critical
; /* non-zero enter debugger on error */
65 int hammer_cluster_enable
= 1; /* enable read clustering by default */
66 int hammer_count_fsyncs
;
67 int hammer_count_inodes
;
68 int hammer_count_iqueued
;
69 int hammer_count_reclaiming
;
70 int hammer_count_records
;
71 int hammer_count_record_datas
;
72 int hammer_count_volumes
;
73 int hammer_count_buffers
;
74 int hammer_count_nodes
;
75 int64_t hammer_count_extra_space_used
;
76 int64_t hammer_stats_btree_lookups
;
77 int64_t hammer_stats_btree_searches
;
78 int64_t hammer_stats_btree_inserts
;
79 int64_t hammer_stats_btree_deletes
;
80 int64_t hammer_stats_btree_elements
;
81 int64_t hammer_stats_btree_splits
;
82 int64_t hammer_stats_btree_iterations
;
83 int64_t hammer_stats_btree_root_iterations
;
84 int64_t hammer_stats_record_iterations
;
86 int64_t hammer_stats_file_read
;
87 int64_t hammer_stats_file_write
;
88 int64_t hammer_stats_file_iopsr
;
89 int64_t hammer_stats_file_iopsw
;
90 int64_t hammer_stats_disk_read
;
91 int64_t hammer_stats_disk_write
;
92 int64_t hammer_stats_inode_flushes
;
93 int64_t hammer_stats_commits
;
94 int64_t hammer_stats_undo
;
95 int64_t hammer_stats_redo
;
97 int hammer_count_dirtybufspace
; /* global */
98 int hammer_count_refedbufs
; /* global */
99 int hammer_count_reservations
;
100 int hammer_count_io_running_read
;
101 int hammer_count_io_running_write
;
102 int hammer_count_io_locked
;
103 int hammer_limit_dirtybufspace
; /* per-mount */
104 int hammer_limit_recs
; /* as a whole XXX */
105 int hammer_limit_inode_recs
= 1024; /* per inode */
106 int hammer_limit_reclaim
= HAMMER_RECLAIM_WAIT
;
107 int hammer_limit_redo
= 4096 * 1024; /* per inode */
108 int hammer_autoflush
= 2000; /* auto flush */
109 int hammer_bio_count
;
110 int hammer_verify_zone
;
111 int hammer_verify_data
= 1;
112 int hammer_write_mode
;
113 int hammer_yield_check
= 16;
114 int hammer_fsync_mode
;
115 int64_t hammer_contention_count
;
116 int64_t hammer_zone_limit
;
118 SYSCTL_NODE(_vfs
, OID_AUTO
, hammer
, CTLFLAG_RW
, 0, "HAMMER filesystem");
119 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, supported_version
, CTLFLAG_RD
,
120 &hammer_supported_version
, 0, "");
121 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_general
, CTLFLAG_RW
,
122 &hammer_debug_general
, 0, "");
123 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_io
, CTLFLAG_RW
,
124 &hammer_debug_io
, 0, "");
125 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_debug
, CTLFLAG_RW
,
126 &hammer_debug_debug
, 0, "");
127 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_inode
, CTLFLAG_RW
,
128 &hammer_debug_inode
, 0, "");
129 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_locks
, CTLFLAG_RW
,
130 &hammer_debug_locks
, 0, "");
131 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_btree
, CTLFLAG_RW
,
132 &hammer_debug_btree
, 0, "");
133 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_tid
, CTLFLAG_RW
,
134 &hammer_debug_tid
, 0, "");
135 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover
, CTLFLAG_RW
,
136 &hammer_debug_recover
, 0, "");
137 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_recover_faults
, CTLFLAG_RW
,
138 &hammer_debug_recover_faults
, 0, "");
139 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, debug_critical
, CTLFLAG_RW
,
140 &hammer_debug_critical
, 0, "");
141 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, cluster_enable
, CTLFLAG_RW
,
142 &hammer_cluster_enable
, 0, "");
144 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_dirtybufspace
, CTLFLAG_RW
,
145 &hammer_limit_dirtybufspace
, 0, "");
146 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_recs
, CTLFLAG_RW
,
147 &hammer_limit_recs
, 0, "");
148 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_inode_recs
, CTLFLAG_RW
,
149 &hammer_limit_inode_recs
, 0, "");
150 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_reclaim
, CTLFLAG_RW
,
151 &hammer_limit_reclaim
, 0, "");
152 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, limit_redo
, CTLFLAG_RW
,
153 &hammer_limit_redo
, 0, "");
155 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_fsyncs
, CTLFLAG_RD
,
156 &hammer_count_fsyncs
, 0, "");
157 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_inodes
, CTLFLAG_RD
,
158 &hammer_count_inodes
, 0, "");
159 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_iqueued
, CTLFLAG_RD
,
160 &hammer_count_iqueued
, 0, "");
161 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_reclaiming
, CTLFLAG_RD
,
162 &hammer_count_reclaiming
, 0, "");
163 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_records
, CTLFLAG_RD
,
164 &hammer_count_records
, 0, "");
165 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_record_datas
, CTLFLAG_RD
,
166 &hammer_count_record_datas
, 0, "");
167 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_volumes
, CTLFLAG_RD
,
168 &hammer_count_volumes
, 0, "");
169 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_buffers
, CTLFLAG_RD
,
170 &hammer_count_buffers
, 0, "");
171 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_nodes
, CTLFLAG_RD
,
172 &hammer_count_nodes
, 0, "");
173 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, count_extra_space_used
, CTLFLAG_RD
,
174 &hammer_count_extra_space_used
, 0, "");
176 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_searches
, CTLFLAG_RD
,
177 &hammer_stats_btree_searches
, 0, "");
178 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_lookups
, CTLFLAG_RD
,
179 &hammer_stats_btree_lookups
, 0, "");
180 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_inserts
, CTLFLAG_RD
,
181 &hammer_stats_btree_inserts
, 0, "");
182 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_deletes
, CTLFLAG_RD
,
183 &hammer_stats_btree_deletes
, 0, "");
184 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_elements
, CTLFLAG_RD
,
185 &hammer_stats_btree_elements
, 0, "");
186 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_splits
, CTLFLAG_RD
,
187 &hammer_stats_btree_splits
, 0, "");
188 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_iterations
, CTLFLAG_RD
,
189 &hammer_stats_btree_iterations
, 0, "");
190 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_btree_root_iterations
, CTLFLAG_RD
,
191 &hammer_stats_btree_root_iterations
, 0, "");
192 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_record_iterations
, CTLFLAG_RD
,
193 &hammer_stats_record_iterations
, 0, "");
195 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_read
, CTLFLAG_RD
,
196 &hammer_stats_file_read
, 0, "");
197 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_write
, CTLFLAG_RD
,
198 &hammer_stats_file_write
, 0, "");
199 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_iopsr
, CTLFLAG_RD
,
200 &hammer_stats_file_iopsr
, 0, "");
201 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_file_iopsw
, CTLFLAG_RD
,
202 &hammer_stats_file_iopsw
, 0, "");
203 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_disk_read
, CTLFLAG_RD
,
204 &hammer_stats_disk_read
, 0, "");
205 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_disk_write
, CTLFLAG_RD
,
206 &hammer_stats_disk_write
, 0, "");
207 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_inode_flushes
, CTLFLAG_RD
,
208 &hammer_stats_inode_flushes
, 0, "");
209 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_commits
, CTLFLAG_RD
,
210 &hammer_stats_commits
, 0, "");
211 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_undo
, CTLFLAG_RD
,
212 &hammer_stats_undo
, 0, "");
213 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, stats_redo
, CTLFLAG_RD
,
214 &hammer_stats_redo
, 0, "");
216 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_dirtybufspace
, CTLFLAG_RD
,
217 &hammer_count_dirtybufspace
, 0, "");
218 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_refedbufs
, CTLFLAG_RD
,
219 &hammer_count_refedbufs
, 0, "");
220 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_reservations
, CTLFLAG_RD
,
221 &hammer_count_reservations
, 0, "");
222 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_io_running_read
, CTLFLAG_RD
,
223 &hammer_count_io_running_read
, 0, "");
224 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_io_locked
, CTLFLAG_RD
,
225 &hammer_count_io_locked
, 0, "");
226 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, count_io_running_write
, CTLFLAG_RD
,
227 &hammer_count_io_running_write
, 0, "");
228 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, zone_limit
, CTLFLAG_RW
,
229 &hammer_zone_limit
, 0, "");
230 SYSCTL_QUAD(_vfs_hammer
, OID_AUTO
, contention_count
, CTLFLAG_RW
,
231 &hammer_contention_count
, 0, "");
232 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, autoflush
, CTLFLAG_RW
,
233 &hammer_autoflush
, 0, "");
234 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, verify_zone
, CTLFLAG_RW
,
235 &hammer_verify_zone
, 0, "");
236 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, verify_data
, CTLFLAG_RW
,
237 &hammer_verify_data
, 0, "");
238 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, write_mode
, CTLFLAG_RW
,
239 &hammer_write_mode
, 0, "");
240 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, yield_check
, CTLFLAG_RW
,
241 &hammer_yield_check
, 0, "");
242 SYSCTL_INT(_vfs_hammer
, OID_AUTO
, fsync_mode
, CTLFLAG_RW
,
243 &hammer_fsync_mode
, 0, "");
245 KTR_INFO_MASTER(hammer
);
250 static void hammer_free_hmp(struct mount
*mp
);
252 static int hammer_vfs_mount(struct mount
*mp
, char *path
, caddr_t data
,
254 static int hammer_vfs_unmount(struct mount
*mp
, int mntflags
);
255 static int hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
);
256 static int hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
,
258 static int hammer_vfs_statvfs(struct mount
*mp
, struct statvfs
*sbp
,
260 static int hammer_vfs_sync(struct mount
*mp
, int waitfor
);
261 static int hammer_vfs_vget(struct mount
*mp
, struct vnode
*dvp
,
262 ino_t ino
, struct vnode
**vpp
);
263 static int hammer_vfs_init(struct vfsconf
*conf
);
264 static int hammer_vfs_fhtovp(struct mount
*mp
, struct vnode
*rootvp
,
265 struct fid
*fhp
, struct vnode
**vpp
);
266 static int hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
);
267 static int hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
268 int *exflagsp
, struct ucred
**credanonp
);
271 static struct vfsops hammer_vfsops
= {
272 .vfs_mount
= hammer_vfs_mount
,
273 .vfs_unmount
= hammer_vfs_unmount
,
274 .vfs_root
= hammer_vfs_root
,
275 .vfs_statfs
= hammer_vfs_statfs
,
276 .vfs_statvfs
= hammer_vfs_statvfs
,
277 .vfs_sync
= hammer_vfs_sync
,
278 .vfs_vget
= hammer_vfs_vget
,
279 .vfs_init
= hammer_vfs_init
,
280 .vfs_vptofh
= hammer_vfs_vptofh
,
281 .vfs_fhtovp
= hammer_vfs_fhtovp
,
282 .vfs_checkexp
= hammer_vfs_checkexp
285 MALLOC_DEFINE(M_HAMMER
, "HAMMER-mount", "");
287 VFS_SET(hammer_vfsops
, hammer
, 0);
288 MODULE_VERSION(hammer
, 1);
291 hammer_vfs_init(struct vfsconf
*conf
)
295 if (hammer_limit_recs
== 0) {
296 hammer_limit_recs
= nbuf
* 25;
297 n
= kmalloc_limit(M_HAMMER
) / 512;
298 if (hammer_limit_recs
> n
)
299 hammer_limit_recs
= n
;
301 if (hammer_limit_dirtybufspace
== 0) {
302 hammer_limit_dirtybufspace
= hidirtybufspace
/ 2;
303 if (hammer_limit_dirtybufspace
< 100)
304 hammer_limit_dirtybufspace
= 100;
310 hammer_vfs_mount(struct mount
*mp
, char *mntpt
, caddr_t data
,
313 struct hammer_mount_info info
;
315 hammer_volume_t rootvol
;
316 struct vnode
*rootvp
;
317 struct vnode
*devvp
= NULL
;
318 const char *upath
; /* volume name in userspace */
319 char *path
; /* volume name in system space */
324 char *next_volume_ptr
= NULL
;
327 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot.
330 bzero(&info
, sizeof(info
));
335 next_volume_ptr
= mp
->mnt_stat
.f_mntfromname
;
337 /* Count number of volumes separated by ':' */
338 for (char *p
= next_volume_ptr
; *p
!= '\0'; ++p
) {
344 mp
->mnt_flag
&= ~MNT_RDONLY
; /* mount R/W */
346 if ((error
= copyin(data
, &info
, sizeof(info
))) != 0)
351 * updating or new mount
353 if (mp
->mnt_flag
& MNT_UPDATE
) {
354 hmp
= (void *)mp
->mnt_data
;
355 KKASSERT(hmp
!= NULL
);
357 if (info
.nvolumes
<= 0 || info
.nvolumes
>= 32768)
363 * master-id validation. The master id may not be changed by a
366 if (info
.hflags
& HMNT_MASTERID
) {
367 if (hmp
&& hmp
->master_id
!= info
.master_id
) {
368 kprintf("hammer: cannot change master id "
369 "with mount update\n");
372 master_id
= info
.master_id
;
373 if (master_id
< -1 || master_id
>= HAMMER_MAX_MASTERS
)
377 master_id
= hmp
->master_id
;
383 * Interal mount data structure
386 hmp
= kmalloc(sizeof(*hmp
), M_HAMMER
, M_WAITOK
| M_ZERO
);
387 mp
->mnt_data
= (qaddr_t
)hmp
;
389 /*TAILQ_INIT(&hmp->recycle_list);*/
392 * Make sure kmalloc type limits are set appropriately. If root
393 * increases the vnode limit you may have to do a dummy remount
394 * to adjust the HAMMER inode limit.
396 kmalloc_create(&hmp
->m_misc
, "HAMMER-others");
397 kmalloc_create(&hmp
->m_inodes
, "HAMMER-inodes");
399 maxinodes
= desiredvnodes
+ desiredvnodes
/ 5 +
400 hammer_limit_reclaim
* 2;
401 kmalloc_raise_limit(hmp
->m_inodes
,
402 maxinodes
* sizeof(struct hammer_inode
));
404 hmp
->root_btree_beg
.localization
= 0x00000000U
;
405 hmp
->root_btree_beg
.obj_id
= -0x8000000000000000LL
;
406 hmp
->root_btree_beg
.key
= -0x8000000000000000LL
;
407 hmp
->root_btree_beg
.create_tid
= 1;
408 hmp
->root_btree_beg
.delete_tid
= 1;
409 hmp
->root_btree_beg
.rec_type
= 0;
410 hmp
->root_btree_beg
.obj_type
= 0;
412 hmp
->root_btree_end
.localization
= 0xFFFFFFFFU
;
413 hmp
->root_btree_end
.obj_id
= 0x7FFFFFFFFFFFFFFFLL
;
414 hmp
->root_btree_end
.key
= 0x7FFFFFFFFFFFFFFFLL
;
415 hmp
->root_btree_end
.create_tid
= 0xFFFFFFFFFFFFFFFFULL
;
416 hmp
->root_btree_end
.delete_tid
= 0; /* special case */
417 hmp
->root_btree_end
.rec_type
= 0xFFFFU
;
418 hmp
->root_btree_end
.obj_type
= 0;
420 hmp
->krate
.freq
= 1; /* maximum reporting rate (hz) */
421 hmp
->krate
.count
= -16; /* initial burst */
423 hmp
->sync_lock
.refs
= 1;
424 hmp
->free_lock
.refs
= 1;
425 hmp
->undo_lock
.refs
= 1;
426 hmp
->blkmap_lock
.refs
= 1;
427 hmp
->snapshot_lock
.refs
= 1;
428 hmp
->volume_lock
.refs
= 1;
430 TAILQ_INIT(&hmp
->delay_list
);
431 TAILQ_INIT(&hmp
->flush_group_list
);
432 TAILQ_INIT(&hmp
->objid_cache_list
);
433 TAILQ_INIT(&hmp
->undo_lru_list
);
434 TAILQ_INIT(&hmp
->reclaim_list
);
436 hmp
->hflags
&= ~HMNT_USERFLAGS
;
437 hmp
->hflags
|= info
.hflags
& HMNT_USERFLAGS
;
439 hmp
->master_id
= master_id
;
442 mp
->mnt_flag
|= MNT_RDONLY
;
443 hmp
->asof
= info
.asof
;
445 hmp
->asof
= HAMMER_MAX_TID
;
448 hmp
->volume_to_remove
= -1;
451 * Re-open read-write if originally read-only, or vise-versa.
453 * When going from read-only to read-write execute the stage2
454 * recovery if it has not already been run.
456 if (mp
->mnt_flag
& MNT_UPDATE
) {
458 if (hmp
->ronly
&& (mp
->mnt_kern_flag
& MNTK_WANTRDWR
)) {
459 kprintf("HAMMER read-only -> read-write\n");
461 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
462 hammer_adjust_volume_mode
, NULL
);
463 rootvol
= hammer_get_root_volume(hmp
, &error
);
465 hammer_recover_flush_buffers(hmp
, rootvol
, 1);
466 error
= hammer_recover_stage2(hmp
, rootvol
);
467 bcopy(rootvol
->ondisk
->vol0_blockmap
,
469 sizeof(hmp
->blockmap
));
470 hammer_rel_volume(rootvol
, 0);
472 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
473 hammer_reload_inode
, NULL
);
474 /* kernel clears MNT_RDONLY */
475 } else if (hmp
->ronly
== 0 && (mp
->mnt_flag
& MNT_RDONLY
)) {
476 kprintf("HAMMER read-write -> read-only\n");
477 hmp
->ronly
= 1; /* messy */
478 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
479 hammer_reload_inode
, NULL
);
481 hammer_flusher_sync(hmp
);
482 hammer_flusher_sync(hmp
);
483 hammer_flusher_sync(hmp
);
485 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
486 hammer_adjust_volume_mode
, NULL
);
491 RB_INIT(&hmp
->rb_vols_root
);
492 RB_INIT(&hmp
->rb_inos_root
);
493 RB_INIT(&hmp
->rb_redo_root
);
494 RB_INIT(&hmp
->rb_nods_root
);
495 RB_INIT(&hmp
->rb_undo_root
);
496 RB_INIT(&hmp
->rb_resv_root
);
497 RB_INIT(&hmp
->rb_bufs_root
);
498 RB_INIT(&hmp
->rb_pfsm_root
);
500 hmp
->ronly
= ((mp
->mnt_flag
& MNT_RDONLY
) != 0);
502 TAILQ_INIT(&hmp
->volu_list
);
503 TAILQ_INIT(&hmp
->undo_list
);
504 TAILQ_INIT(&hmp
->data_list
);
505 TAILQ_INIT(&hmp
->meta_list
);
506 TAILQ_INIT(&hmp
->lose_list
);
511 path
= objcache_get(namei_oc
, M_WAITOK
);
513 for (i
= 0; i
< info
.nvolumes
; ++i
) {
518 KKASSERT(next_volume_ptr
!= NULL
);
520 if (*next_volume_ptr
!= '/') {
522 strcpy(path
, "/dev/");
525 for (k
= strlen(path
); k
< MAXPATHLEN
-1; ++k
) {
526 if (*next_volume_ptr
== '\0') {
528 } else if (*next_volume_ptr
== ':') {
532 path
[k
] = *next_volume_ptr
;
539 cdev_t dev
= kgetdiskbyname(path
);
540 error
= bdevvp(dev
, &devvp
);
542 kprintf("hammer_mountroot: can't find devvp\n");
545 error
= copyin(&info
.volumes
[i
], &upath
,
548 error
= copyinstr(upath
, path
,
552 error
= hammer_install_volume(hmp
, path
, devvp
);
556 objcache_put(namei_oc
, path
);
559 * Make sure we found a root volume
561 if (error
== 0 && hmp
->rootvol
== NULL
) {
562 kprintf("hammer_mount: No root volume found!\n");
567 * Check that all required volumes are available
569 if (error
== 0 && hammer_mountcheck_volumes(hmp
)) {
570 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
580 * No errors, setup enough of the mount point so we can lookup the
583 mp
->mnt_iosize_max
= MAXPHYS
;
584 mp
->mnt_kern_flag
|= MNTK_FSMID
;
587 * MPSAFE code. Note that VOPs and VFSops which are not MPSAFE
588 * will acquire a per-mount token prior to entry and release it
589 * on return, so even if we do not specify it we no longer get
590 * the BGL regardlless of how we are flagged.
592 mp
->mnt_kern_flag
|= MNTK_RD_MPSAFE
| MNTK_GA_MPSAFE
|
596 * note: f_iosize is used by vnode_pager_haspage() when constructing
599 mp
->mnt_stat
.f_iosize
= HAMMER_BUFSIZE
;
600 mp
->mnt_stat
.f_bsize
= HAMMER_BUFSIZE
;
602 mp
->mnt_vstat
.f_frsize
= HAMMER_BUFSIZE
;
603 mp
->mnt_vstat
.f_bsize
= HAMMER_BUFSIZE
;
605 mp
->mnt_maxsymlinklen
= 255;
606 mp
->mnt_flag
|= MNT_LOCAL
;
608 vfs_add_vnodeops(mp
, &hammer_vnode_vops
, &mp
->mnt_vn_norm_ops
);
609 vfs_add_vnodeops(mp
, &hammer_spec_vops
, &mp
->mnt_vn_spec_ops
);
610 vfs_add_vnodeops(mp
, &hammer_fifo_vops
, &mp
->mnt_vn_fifo_ops
);
613 * The root volume's ondisk pointer is only valid if we hold a
616 rootvol
= hammer_get_root_volume(hmp
, &error
);
621 * Perform any necessary UNDO operations. The recovery code does
622 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
623 * and then re-copy it again after recovery is complete.
625 * If this is a read-only mount the UNDO information is retained
626 * in memory in the form of dirty buffer cache buffers, and not
627 * written back to the media.
629 bcopy(rootvol
->ondisk
->vol0_blockmap
, hmp
->blockmap
,
630 sizeof(hmp
->blockmap
));
633 * Check filesystem version
635 hmp
->version
= rootvol
->ondisk
->vol_version
;
636 if (hmp
->version
< HAMMER_VOL_VERSION_MIN
||
637 hmp
->version
> HAMMER_VOL_VERSION_MAX
) {
638 kprintf("HAMMER: mount unsupported fs version %d\n",
645 * The undo_rec_limit limits the size of flush groups to avoid
646 * blowing out the UNDO FIFO. This calculation is typically in
647 * the tens of thousands and is designed primarily when small
648 * HAMMER filesystems are created.
650 hmp
->undo_rec_limit
= hammer_undo_max(hmp
) / 8192 + 100;
651 if (hammer_debug_general
& 0x0001)
652 kprintf("HAMMER: undo_rec_limit %d\n", hmp
->undo_rec_limit
);
655 * NOTE: Recover stage1 not only handles meta-data recovery, it
656 * also sets hmp->undo_seqno for HAMMER VERSION 4+ filesystems.
658 error
= hammer_recover_stage1(hmp
, rootvol
);
660 kprintf("Failed to recover HAMMER filesystem on mount\n");
665 * Finish setup now that we have a good root volume.
667 * The top 16 bits of fsid.val[1] is a pfs id.
669 ksnprintf(mp
->mnt_stat
.f_mntfromname
,
670 sizeof(mp
->mnt_stat
.f_mntfromname
), "%s",
671 rootvol
->ondisk
->vol_name
);
672 mp
->mnt_stat
.f_fsid
.val
[0] =
673 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 0, 8);
674 mp
->mnt_stat
.f_fsid
.val
[1] =
675 crc32((char *)&rootvol
->ondisk
->vol_fsid
+ 8, 8);
676 mp
->mnt_stat
.f_fsid
.val
[1] &= 0x0000FFFF;
678 mp
->mnt_vstat
.f_fsid_uuid
= rootvol
->ondisk
->vol_fsid
;
679 mp
->mnt_vstat
.f_fsid
= crc32(&mp
->mnt_vstat
.f_fsid_uuid
,
680 sizeof(mp
->mnt_vstat
.f_fsid_uuid
));
683 * Certain often-modified fields in the root volume are cached in
684 * the hammer_mount structure so we do not have to generate lots
685 * of little UNDO structures for them.
687 * Recopy after recovery. This also has the side effect of
688 * setting our cached undo FIFO's first_offset, which serves to
689 * placemark the FIFO start for the NEXT flush cycle while the
690 * on-disk first_offset represents the LAST flush cycle.
692 hmp
->next_tid
= rootvol
->ondisk
->vol0_next_tid
;
693 hmp
->flush_tid1
= hmp
->next_tid
;
694 hmp
->flush_tid2
= hmp
->next_tid
;
695 bcopy(rootvol
->ondisk
->vol0_blockmap
, hmp
->blockmap
,
696 sizeof(hmp
->blockmap
));
697 hmp
->copy_stat_freebigblocks
= rootvol
->ondisk
->vol0_stat_freebigblocks
;
699 hammer_flusher_create(hmp
);
702 * Locate the root directory using the root cluster's B-Tree as a
703 * starting point. The root directory uses an obj_id of 1.
705 * FUTURE: Leave the root directory cached referenced but unlocked
706 * in hmp->rootvp (need to flush it on unmount).
708 error
= hammer_vfs_vget(mp
, NULL
, 1, &rootvp
);
712 /*vn_unlock(hmp->rootvp);*/
714 error
= hammer_recover_stage2(hmp
, rootvol
);
717 hammer_rel_volume(rootvol
, 0);
720 * Cleanup and return.
728 hammer_vfs_unmount(struct mount
*mp
, int mntflags
)
731 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
737 * Clean out the vnodes
740 if (mntflags
& MNT_FORCE
)
742 if ((error
= vflush(mp
, 0, flags
)) != 0)
746 * Clean up the internal mount structure and related entities. This
754 * Clean up the internal mount structure and disassociate it from the mount.
755 * This may issue I/O.
758 hammer_free_hmp(struct mount
*mp
)
760 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
761 hammer_flush_group_t flg
;
766 * Flush anything dirty. This won't even run if the
767 * filesystem errored-out.
770 while (hammer_flusher_haswork(hmp
)) {
771 hammer_flusher_sync(hmp
);
775 kprintf("HAMMER: umount flushing.");
778 tsleep(&dummy
, 0, "hmrufl", hz
);
781 kprintf("giving up\n");
785 if (count
>= 5 && count
< 30)
789 * If the mount had a critical error we have to destroy any
790 * remaining inodes before we can finish cleaning up the flusher.
792 if (hmp
->flags
& HAMMER_MOUNT_CRITICAL_ERROR
) {
793 RB_SCAN(hammer_ino_rb_tree
, &hmp
->rb_inos_root
, NULL
,
794 hammer_destroy_inode_callback
, NULL
);
798 * There shouldn't be any inodes left now and any left over
799 * flush groups should now be empty.
801 KKASSERT(RB_EMPTY(&hmp
->rb_inos_root
));
802 while ((flg
= TAILQ_FIRST(&hmp
->flush_group_list
)) != NULL
) {
803 TAILQ_REMOVE(&hmp
->flush_group_list
, flg
, flush_entry
);
804 KKASSERT(RB_EMPTY(&flg
->flush_tree
));
806 kprintf("HAMMER: Warning, flush_group %p was "
807 "not empty on umount!\n", flg
);
809 kfree(flg
, hmp
->m_misc
);
813 * We can finally destroy the flusher
815 hammer_flusher_destroy(hmp
);
818 * We may have held recovered buffers due to a read-only mount.
819 * These must be discarded.
822 hammer_recover_flush_buffers(hmp
, NULL
, -1);
825 * Unload buffers and then volumes
827 RB_SCAN(hammer_buf_rb_tree
, &hmp
->rb_bufs_root
, NULL
,
828 hammer_unload_buffer
, NULL
);
829 RB_SCAN(hammer_vol_rb_tree
, &hmp
->rb_vols_root
, NULL
,
830 hammer_unload_volume
, NULL
);
833 mp
->mnt_flag
&= ~MNT_LOCAL
;
835 hammer_destroy_objid_cache(hmp
);
836 kmalloc_destroy(&hmp
->m_misc
);
837 kmalloc_destroy(&hmp
->m_inodes
);
838 kfree(hmp
, M_HAMMER
);
842 * Report critical errors. ip may be NULL.
845 hammer_critical_error(hammer_mount_t hmp
, hammer_inode_t ip
,
846 int error
, const char *msg
)
848 hmp
->flags
|= HAMMER_MOUNT_CRITICAL_ERROR
;
850 krateprintf(&hmp
->krate
,
851 "HAMMER(%s): Critical error inode=%jd error=%d %s\n",
852 hmp
->mp
->mnt_stat
.f_mntfromname
,
853 (intmax_t)(ip
? ip
->obj_id
: -1),
856 if (hmp
->ronly
== 0) {
857 hmp
->ronly
= 2; /* special errored read-only mode */
858 hmp
->mp
->mnt_flag
|= MNT_RDONLY
;
859 kprintf("HAMMER(%s): Forcing read-only mode\n",
860 hmp
->mp
->mnt_stat
.f_mntfromname
);
863 if (hammer_debug_critical
)
864 Debugger("Entering debugger");
869 * Obtain a vnode for the specified inode number. An exclusively locked
873 hammer_vfs_vget(struct mount
*mp
, struct vnode
*dvp
,
874 ino_t ino
, struct vnode
**vpp
)
876 struct hammer_transaction trans
;
877 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
878 struct hammer_inode
*ip
;
880 u_int32_t localization
;
882 hammer_simple_transaction(&trans
, hmp
);
885 * If a directory vnode is supplied (mainly NFS) then we can acquire
886 * the PFS domain from it. Otherwise we would only be able to vget
887 * inodes in the root PFS.
890 localization
= HAMMER_DEF_LOCALIZATION
+
891 VTOI(dvp
)->obj_localization
;
893 localization
= HAMMER_DEF_LOCALIZATION
;
897 * Lookup the requested HAMMER inode. The structure must be
898 * left unlocked while we manipulate the related vnode to avoid
901 ip
= hammer_get_inode(&trans
, NULL
, ino
,
902 hmp
->asof
, localization
,
906 hammer_done_transaction(&trans
);
909 error
= hammer_get_vnode(ip
, vpp
);
910 hammer_rel_inode(ip
, 0);
911 hammer_done_transaction(&trans
);
916 * Return the root vnode for the filesystem.
918 * HAMMER stores the root vnode in the hammer_mount structure so
919 * getting it is easy.
922 hammer_vfs_root(struct mount
*mp
, struct vnode
**vpp
)
925 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
929 error
= hammer_vfs_vget(mp
, NULL
, 1, vpp
);
934 hammer_vfs_statfs(struct mount
*mp
, struct statfs
*sbp
, struct ucred
*cred
)
936 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
937 hammer_volume_t volume
;
938 hammer_volume_ondisk_t ondisk
;
943 volume
= hammer_get_root_volume(hmp
, &error
);
946 ondisk
= volume
->ondisk
;
951 _hammer_checkspace(hmp
, HAMMER_CHKSPC_WRITE
, &breserved
);
952 mp
->mnt_stat
.f_files
= ondisk
->vol0_stat_inodes
;
953 bfree
= ondisk
->vol0_stat_freebigblocks
* HAMMER_LARGEBLOCK_SIZE
;
954 hammer_rel_volume(volume
, 0);
956 mp
->mnt_stat
.f_bfree
= (bfree
- breserved
) / HAMMER_BUFSIZE
;
957 mp
->mnt_stat
.f_bavail
= mp
->mnt_stat
.f_bfree
;
958 if (mp
->mnt_stat
.f_files
< 0)
959 mp
->mnt_stat
.f_files
= 0;
966 hammer_vfs_statvfs(struct mount
*mp
, struct statvfs
*sbp
, struct ucred
*cred
)
968 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
969 hammer_volume_t volume
;
970 hammer_volume_ondisk_t ondisk
;
975 volume
= hammer_get_root_volume(hmp
, &error
);
978 ondisk
= volume
->ondisk
;
983 _hammer_checkspace(hmp
, HAMMER_CHKSPC_WRITE
, &breserved
);
984 mp
->mnt_vstat
.f_files
= ondisk
->vol0_stat_inodes
;
985 bfree
= ondisk
->vol0_stat_freebigblocks
* HAMMER_LARGEBLOCK_SIZE
;
986 hammer_rel_volume(volume
, 0);
988 mp
->mnt_vstat
.f_bfree
= (bfree
- breserved
) / HAMMER_BUFSIZE
;
989 mp
->mnt_vstat
.f_bavail
= mp
->mnt_vstat
.f_bfree
;
990 if (mp
->mnt_vstat
.f_files
< 0)
991 mp
->mnt_vstat
.f_files
= 0;
992 *sbp
= mp
->mnt_vstat
;
997 * Sync the filesystem. Currently we have to run it twice, the second
998 * one will advance the undo start index to the end index, so if a crash
999 * occurs no undos will be run on mount.
1001 * We do not sync the filesystem if we are called from a panic. If we did
1002 * we might end up blowing up a sync that was already in progress.
1005 hammer_vfs_sync(struct mount
*mp
, int waitfor
)
1007 struct hammer_mount
*hmp
= (void *)mp
->mnt_data
;
1010 if (panicstr
== NULL
) {
1011 error
= hammer_sync_hmp(hmp
, waitfor
);
1019 * Convert a vnode to a file handle.
1022 hammer_vfs_vptofh(struct vnode
*vp
, struct fid
*fhp
)
1026 KKASSERT(MAXFIDSZ
>= 16);
1028 fhp
->fid_len
= offsetof(struct fid
, fid_data
[16]);
1029 fhp
->fid_ext
= ip
->obj_localization
>> 16;
1030 bcopy(&ip
->obj_id
, fhp
->fid_data
+ 0, sizeof(ip
->obj_id
));
1031 bcopy(&ip
->obj_asof
, fhp
->fid_data
+ 8, sizeof(ip
->obj_asof
));
1037 * Convert a file handle back to a vnode.
1039 * Use rootvp to enforce PFS isolation when a PFS is exported via a
1043 hammer_vfs_fhtovp(struct mount
*mp
, struct vnode
*rootvp
,
1044 struct fid
*fhp
, struct vnode
**vpp
)
1046 struct hammer_transaction trans
;
1047 struct hammer_inode
*ip
;
1048 struct hammer_inode_info info
;
1050 u_int32_t localization
;
1052 bcopy(fhp
->fid_data
+ 0, &info
.obj_id
, sizeof(info
.obj_id
));
1053 bcopy(fhp
->fid_data
+ 8, &info
.obj_asof
, sizeof(info
.obj_asof
));
1055 localization
= VTOI(rootvp
)->obj_localization
;
1057 localization
= (u_int32_t
)fhp
->fid_ext
<< 16;
1059 hammer_simple_transaction(&trans
, (void *)mp
->mnt_data
);
1062 * Get/allocate the hammer_inode structure. The structure must be
1063 * unlocked while we manipulate the related vnode to avoid a
1066 ip
= hammer_get_inode(&trans
, NULL
, info
.obj_id
,
1067 info
.obj_asof
, localization
, 0, &error
);
1069 error
= hammer_get_vnode(ip
, vpp
);
1070 hammer_rel_inode(ip
, 0);
1074 hammer_done_transaction(&trans
);
1079 hammer_vfs_checkexp(struct mount
*mp
, struct sockaddr
*nam
,
1080 int *exflagsp
, struct ucred
**credanonp
)
1082 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
1086 np
= vfs_export_lookup(mp
, &hmp
->export
, nam
);
1088 *exflagsp
= np
->netc_exflags
;
1089 *credanonp
= &np
->netc_anon
;
1099 hammer_vfs_export(struct mount
*mp
, int op
, const struct export_args
*export
)
1101 hammer_mount_t hmp
= (void *)mp
->mnt_data
;
1105 case MOUNTCTL_SET_EXPORT
:
1106 error
= vfs_export(mp
, &hmp
->export
, export
);