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_TWO;
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_error_panic; /* panic on error levels */
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;
91 int hammer_count_dirtybufspace; /* global */
92 int hammer_count_refedbufs; /* global */
93 int hammer_count_reservations;
94 int hammer_count_io_running_read;
95 int hammer_count_io_running_write;
96 int hammer_count_io_locked;
97 int hammer_limit_dirtybufspace; /* per-mount */
98 int hammer_limit_recs; /* as a whole XXX */
99 int hammer_limit_inode_recs = 1024; /* per inode */
100 int hammer_autoflush = 2000; /* auto flush */
101 int hammer_bio_count;
102 int hammer_verify_zone;
103 int hammer_verify_data = 1;
104 int hammer_write_mode;
105 int hammer_yield_check = 16;
106 int hammer_fsync_mode;
107 int64_t hammer_contention_count;
108 int64_t hammer_zone_limit;
110 SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem");
111 SYSCTL_INT(_vfs_hammer, OID_AUTO, supported_version, CTLFLAG_RD,
112 &hammer_supported_version, 0, "");
113 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW,
114 &hammer_debug_general, 0, "");
115 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW,
116 &hammer_debug_io, 0, "");
117 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW,
118 &hammer_debug_debug, 0, "");
119 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW,
120 &hammer_debug_inode, 0, "");
121 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW,
122 &hammer_debug_locks, 0, "");
123 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW,
124 &hammer_debug_btree, 0, "");
125 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW,
126 &hammer_debug_tid, 0, "");
127 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW,
128 &hammer_debug_recover, 0, "");
129 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW,
130 &hammer_debug_recover_faults, 0, "");
131 SYSCTL_INT(_vfs_hammer, OID_AUTO, error_panic, CTLFLAG_RW,
132 &hammer_error_panic, 0, "");
133 SYSCTL_INT(_vfs_hammer, OID_AUTO, cluster_enable, CTLFLAG_RW,
134 &hammer_cluster_enable, 0, "");
136 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_dirtybufspace, CTLFLAG_RW,
137 &hammer_limit_dirtybufspace, 0, "");
138 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW,
139 &hammer_limit_recs, 0, "");
140 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_inode_recs, CTLFLAG_RW,
141 &hammer_limit_inode_recs, 0, "");
143 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_fsyncs, CTLFLAG_RD,
144 &hammer_count_fsyncs, 0, "");
145 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD,
146 &hammer_count_inodes, 0, "");
147 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD,
148 &hammer_count_iqueued, 0, "");
149 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD,
150 &hammer_count_reclaiming, 0, "");
151 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD,
152 &hammer_count_records, 0, "");
153 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD,
154 &hammer_count_record_datas, 0, "");
155 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD,
156 &hammer_count_volumes, 0, "");
157 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD,
158 &hammer_count_buffers, 0, "");
159 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD,
160 &hammer_count_nodes, 0, "");
161 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, count_extra_space_used, CTLFLAG_RD,
162 &hammer_count_extra_space_used, 0, "");
164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD,
165 &hammer_stats_btree_searches, 0, "");
166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD,
167 &hammer_stats_btree_lookups, 0, "");
168 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD,
169 &hammer_stats_btree_inserts, 0, "");
170 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD,
171 &hammer_stats_btree_deletes, 0, "");
172 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD,
173 &hammer_stats_btree_elements, 0, "");
174 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD,
175 &hammer_stats_btree_splits, 0, "");
176 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD,
177 &hammer_stats_btree_iterations, 0, "");
178 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_root_iterations, CTLFLAG_RD,
179 &hammer_stats_btree_root_iterations, 0, "");
180 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD,
181 &hammer_stats_record_iterations, 0, "");
183 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_read, CTLFLAG_RD,
184 &hammer_stats_file_read, 0, "");
185 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_write, CTLFLAG_RD,
186 &hammer_stats_file_write, 0, "");
187 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsr, CTLFLAG_RD,
188 &hammer_stats_file_iopsr, 0, "");
189 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsw, CTLFLAG_RD,
190 &hammer_stats_file_iopsw, 0, "");
191 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_read, CTLFLAG_RD,
192 &hammer_stats_disk_read, 0, "");
193 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_write, CTLFLAG_RD,
194 &hammer_stats_disk_write, 0, "");
195 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_inode_flushes, CTLFLAG_RD,
196 &hammer_stats_inode_flushes, 0, "");
197 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_commits, CTLFLAG_RD,
198 &hammer_stats_commits, 0, "");
200 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD,
201 &hammer_count_dirtybufspace, 0, "");
202 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD,
203 &hammer_count_refedbufs, 0, "");
204 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD,
205 &hammer_count_reservations, 0, "");
206 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD,
207 &hammer_count_io_running_read, 0, "");
208 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD,
209 &hammer_count_io_locked, 0, "");
210 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD,
211 &hammer_count_io_running_write, 0, "");
212 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW,
213 &hammer_zone_limit, 0, "");
214 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW,
215 &hammer_contention_count, 0, "");
216 SYSCTL_INT(_vfs_hammer, OID_AUTO, autoflush, CTLFLAG_RW,
217 &hammer_autoflush, 0, "");
218 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW,
219 &hammer_verify_zone, 0, "");
220 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_data, CTLFLAG_RW,
221 &hammer_verify_data, 0, "");
222 SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW,
223 &hammer_write_mode, 0, "");
224 SYSCTL_INT(_vfs_hammer, OID_AUTO, yield_check, CTLFLAG_RW,
225 &hammer_yield_check, 0, "");
226 SYSCTL_INT(_vfs_hammer, OID_AUTO, fsync_mode, CTLFLAG_RW,
227 &hammer_fsync_mode, 0, "");
229 KTR_INFO_MASTER(hammer);
234 static void hammer_free_hmp(struct mount *mp);
236 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data,
238 static int hammer_vfs_unmount(struct mount *mp, int mntflags);
239 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp);
240 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp,
242 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
244 static int hammer_vfs_sync(struct mount *mp, int waitfor);
245 static int hammer_vfs_vget(struct mount *mp, struct vnode *dvp,
246 ino_t ino, struct vnode **vpp);
247 static int hammer_vfs_init(struct vfsconf *conf);
248 static int hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
249 struct fid *fhp, struct vnode **vpp);
250 static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp);
251 static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
252 int *exflagsp, struct ucred **credanonp);
255 static struct vfsops hammer_vfsops = {
256 .vfs_mount = hammer_vfs_mount,
257 .vfs_unmount = hammer_vfs_unmount,
258 .vfs_root = hammer_vfs_root,
259 .vfs_statfs = hammer_vfs_statfs,
260 .vfs_statvfs = hammer_vfs_statvfs,
261 .vfs_sync = hammer_vfs_sync,
262 .vfs_vget = hammer_vfs_vget,
263 .vfs_init = hammer_vfs_init,
264 .vfs_vptofh = hammer_vfs_vptofh,
265 .vfs_fhtovp = hammer_vfs_fhtovp,
266 .vfs_checkexp = hammer_vfs_checkexp
269 MALLOC_DEFINE(M_HAMMER, "HAMMER-mount", "");
271 VFS_SET(hammer_vfsops, hammer, 0);
272 MODULE_VERSION(hammer, 1);
275 hammer_vfs_init(struct vfsconf *conf)
279 if (hammer_limit_recs == 0) {
280 hammer_limit_recs = nbuf * 25;
281 n = kmalloc_limit(M_HAMMER) / 512;
282 if (hammer_limit_recs > n)
283 hammer_limit_recs = n;
285 if (hammer_limit_dirtybufspace == 0) {
286 hammer_limit_dirtybufspace = hidirtybufspace / 2;
287 if (hammer_limit_dirtybufspace < 100)
288 hammer_limit_dirtybufspace = 100;
294 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data,
297 struct hammer_mount_info info;
299 hammer_volume_t rootvol;
300 struct vnode *rootvp;
301 struct vnode *devvp = NULL;
302 const char *upath; /* volume name in userspace */
303 char *path; /* volume name in system space */
310 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot.
313 if ((error = bdevvp(rootdev, &devvp))) {
314 kprintf("hammer_mountroot: can't find devvp\n");
317 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */
318 bzero(&info, sizeof(info));
323 if ((error = copyin(data, &info, sizeof(info))) != 0)
328 * updating or new mount
330 if (mp->mnt_flag & MNT_UPDATE) {
331 hmp = (void *)mp->mnt_data;
332 KKASSERT(hmp != NULL);
334 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
340 * master-id validation. The master id may not be changed by a
343 if (info.hflags & HMNT_MASTERID) {
344 if (hmp && hmp->master_id != info.master_id) {
345 kprintf("hammer: cannot change master id "
346 "with mount update\n");
349 master_id = info.master_id;
350 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS)
354 master_id = hmp->master_id;
360 * Interal mount data structure
363 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
364 mp->mnt_data = (qaddr_t)hmp;
366 /*TAILQ_INIT(&hmp->recycle_list);*/
369 * Make sure kmalloc type limits are set appropriately. If root
370 * increases the vnode limit you may have to do a dummy remount
371 * to adjust the HAMMER inode limit.
373 kmalloc_create(&hmp->m_misc, "HAMMER-others");
374 kmalloc_create(&hmp->m_inodes, "HAMMER-inodes");
376 maxinodes = desiredvnodes + desiredvnodes / 5 +
378 kmalloc_raise_limit(hmp->m_inodes,
379 maxinodes * sizeof(struct hammer_inode));
381 hmp->root_btree_beg.localization = 0x00000000U;
382 hmp->root_btree_beg.obj_id = -0x8000000000000000LL;
383 hmp->root_btree_beg.key = -0x8000000000000000LL;
384 hmp->root_btree_beg.create_tid = 1;
385 hmp->root_btree_beg.delete_tid = 1;
386 hmp->root_btree_beg.rec_type = 0;
387 hmp->root_btree_beg.obj_type = 0;
389 hmp->root_btree_end.localization = 0xFFFFFFFFU;
390 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL;
391 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL;
392 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL;
393 hmp->root_btree_end.delete_tid = 0; /* special case */
394 hmp->root_btree_end.rec_type = 0xFFFFU;
395 hmp->root_btree_end.obj_type = 0;
397 hmp->krate.freq = 1; /* maximum reporting rate (hz) */
398 hmp->krate.count = -16; /* initial burst */
400 hmp->sync_lock.refs = 1;
401 hmp->free_lock.refs = 1;
402 hmp->undo_lock.refs = 1;
403 hmp->blkmap_lock.refs = 1;
405 TAILQ_INIT(&hmp->delay_list);
406 TAILQ_INIT(&hmp->flush_group_list);
407 TAILQ_INIT(&hmp->objid_cache_list);
408 TAILQ_INIT(&hmp->undo_lru_list);
409 TAILQ_INIT(&hmp->reclaim_list);
411 hmp->hflags &= ~HMNT_USERFLAGS;
412 hmp->hflags |= info.hflags & HMNT_USERFLAGS;
414 hmp->master_id = master_id;
417 mp->mnt_flag |= MNT_RDONLY;
418 hmp->asof = info.asof;
420 hmp->asof = HAMMER_MAX_TID;
424 * Re-open read-write if originally read-only, or vise-versa.
426 if (mp->mnt_flag & MNT_UPDATE) {
428 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
429 kprintf("HAMMER read-only -> read-write\n");
431 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
432 hammer_adjust_volume_mode, NULL);
433 rootvol = hammer_get_root_volume(hmp, &error);
435 hammer_recover_flush_buffers(hmp, rootvol, 1);
436 bcopy(rootvol->ondisk->vol0_blockmap,
438 sizeof(hmp->blockmap));
439 hammer_rel_volume(rootvol, 0);
441 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
442 hammer_reload_inode, NULL);
443 /* kernel clears MNT_RDONLY */
444 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
445 kprintf("HAMMER read-write -> read-only\n");
446 hmp->ronly = 1; /* messy */
447 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
448 hammer_reload_inode, NULL);
450 hammer_flusher_sync(hmp);
451 hammer_flusher_sync(hmp);
452 hammer_flusher_sync(hmp);
454 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
455 hammer_adjust_volume_mode, NULL);
460 RB_INIT(&hmp->rb_vols_root);
461 RB_INIT(&hmp->rb_inos_root);
462 RB_INIT(&hmp->rb_nods_root);
463 RB_INIT(&hmp->rb_undo_root);
464 RB_INIT(&hmp->rb_resv_root);
465 RB_INIT(&hmp->rb_bufs_root);
466 RB_INIT(&hmp->rb_pfsm_root);
468 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
470 TAILQ_INIT(&hmp->volu_list);
471 TAILQ_INIT(&hmp->undo_list);
472 TAILQ_INIT(&hmp->data_list);
473 TAILQ_INIT(&hmp->meta_list);
474 TAILQ_INIT(&hmp->lose_list);
479 path = objcache_get(namei_oc, M_WAITOK);
481 for (i = 0; i < info.nvolumes; ++i) {
485 * Only one volume; and no need for copyin.
487 KKASSERT(info.nvolumes == 1);
488 ksnprintf(path, MAXPATHLEN, "/dev/%s",
489 mp->mnt_stat.f_mntfromname);
492 error = copyin(&info.volumes[i], &upath,
495 error = copyinstr(upath, path,
499 error = hammer_install_volume(hmp, path, devvp);
503 objcache_put(namei_oc, path);
506 * Make sure we found a root volume
508 if (error == 0 && hmp->rootvol == NULL) {
509 kprintf("hammer_mount: No root volume found!\n");
514 * Check that all required volumes are available
516 if (error == 0 && hammer_mountcheck_volumes(hmp)) {
517 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
527 * No errors, setup enough of the mount point so we can lookup the
530 mp->mnt_iosize_max = MAXPHYS;
531 mp->mnt_kern_flag |= MNTK_FSMID;
534 * note: f_iosize is used by vnode_pager_haspage() when constructing
537 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
538 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE;
540 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE;
541 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE;
543 mp->mnt_maxsymlinklen = 255;
544 mp->mnt_flag |= MNT_LOCAL;
546 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
547 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops);
548 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops);
551 * The root volume's ondisk pointer is only valid if we hold a
554 rootvol = hammer_get_root_volume(hmp, &error);
559 * Perform any necessary UNDO operations. The recovery code does
560 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
561 * and then re-copy it again after recovery is complete.
563 * If this is a read-only mount the UNDO information is retained
564 * in memory in the form of dirty buffer cache buffers, and not
565 * written back to the media.
567 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
568 sizeof(hmp->blockmap));
571 * Check filesystem version
573 hmp->version = rootvol->ondisk->vol_version;
574 if (hmp->version < HAMMER_VOL_VERSION_MIN ||
575 hmp->version > HAMMER_VOL_VERSION_MAX) {
576 kprintf("HAMMER: mount unsupported fs version %d\n",
583 * The undo_rec_limit limits the size of flush groups to avoid
584 * blowing out the UNDO FIFO. This calculation is typically in
585 * the tens of thousands and is designed primarily when small
586 * HAMMER filesystems are created.
588 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100;
589 if (hammer_debug_general & 0x0001)
590 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit);
592 error = hammer_recover(hmp, rootvol);
594 kprintf("Failed to recover HAMMER filesystem on mount\n");
599 * Finish setup now that we have a good root volume.
601 * The top 16 bits of fsid.val[1] is a pfs id.
603 ksnprintf(mp->mnt_stat.f_mntfromname,
604 sizeof(mp->mnt_stat.f_mntfromname), "%s",
605 rootvol->ondisk->vol_name);
606 mp->mnt_stat.f_fsid.val[0] =
607 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8);
608 mp->mnt_stat.f_fsid.val[1] =
609 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8);
610 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF;
612 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid;
613 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid,
614 sizeof(mp->mnt_vstat.f_fsid_uuid));
617 * Certain often-modified fields in the root volume are cached in
618 * the hammer_mount structure so we do not have to generate lots
619 * of little UNDO structures for them.
621 * Recopy after recovery. This also has the side effect of
622 * setting our cached undo FIFO's first_offset, which serves to
623 * placemark the FIFO start for the NEXT flush cycle while the
624 * on-disk first_offset represents the LAST flush cycle.
626 hmp->next_tid = rootvol->ondisk->vol0_next_tid;
627 hmp->flush_tid1 = hmp->next_tid;
628 hmp->flush_tid2 = hmp->next_tid;
629 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
630 sizeof(hmp->blockmap));
631 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks;
633 hammer_flusher_create(hmp);
636 * Locate the root directory using the root cluster's B-Tree as a
637 * starting point. The root directory uses an obj_id of 1.
639 * FUTURE: Leave the root directory cached referenced but unlocked
640 * in hmp->rootvp (need to flush it on unmount).
642 error = hammer_vfs_vget(mp, NULL, 1, &rootvp);
646 /*vn_unlock(hmp->rootvp);*/
649 hammer_rel_volume(rootvol, 0);
652 * Cleanup and return.
660 hammer_vfs_unmount(struct mount *mp, int mntflags)
663 struct hammer_mount *hmp = (void *)mp->mnt_data;
669 * Clean out the vnodes
672 if (mntflags & MNT_FORCE)
674 if ((error = vflush(mp, 0, flags)) != 0)
678 * Clean up the internal mount structure and related entities. This
686 * Clean up the internal mount structure and disassociate it from the mount.
687 * This may issue I/O.
690 hammer_free_hmp(struct mount *mp)
692 struct hammer_mount *hmp = (void *)mp->mnt_data;
693 hammer_flush_group_t flg;
698 * Flush anything dirty. This won't even run if the
699 * filesystem errored-out.
702 while (hammer_flusher_haswork(hmp)) {
703 hammer_flusher_sync(hmp);
707 kprintf("HAMMER: umount flushing.");
710 tsleep(&dummy, 0, "hmrufl", hz);
713 kprintf("giving up\n");
717 if (count >= 5 && count < 30)
721 * If the mount had a critical error we have to destroy any
722 * remaining inodes before we can finish cleaning up the flusher.
724 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) {
725 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
726 hammer_destroy_inode_callback, NULL);
730 * There shouldn't be any inodes left now and any left over
731 * flush groups should now be empty.
733 KKASSERT(RB_EMPTY(&hmp->rb_inos_root));
734 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) {
735 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry);
736 KKASSERT(TAILQ_EMPTY(&flg->flush_list));
738 kprintf("HAMMER: Warning, flush_group %p was "
739 "not empty on umount!\n", flg);
741 kfree(flg, hmp->m_misc);
745 * We can finally destroy the flusher
747 hammer_flusher_destroy(hmp);
750 * We may have held recovered buffers due to a read-only mount.
751 * These must be discarded.
754 hammer_recover_flush_buffers(hmp, NULL, -1);
757 * Unload buffers and then volumes
759 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
760 hammer_unload_buffer, NULL);
761 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
762 hammer_unload_volume, NULL);
765 mp->mnt_flag &= ~MNT_LOCAL;
767 hammer_destroy_objid_cache(hmp);
768 kmalloc_destroy(&hmp->m_misc);
769 kmalloc_destroy(&hmp->m_inodes);
770 kfree(hmp, M_HAMMER);
774 * Report critical errors. ip may be NULL.
777 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip,
778 int error, const char *msg)
780 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR;
782 krateprintf(&hmp->krate,
783 "HAMMER(%s): Critical error inode=%jd error=%d %s\n",
784 hmp->mp->mnt_stat.f_mntfromname,
785 (intmax_t)(ip ? ip->obj_id : -1),
788 if (hmp->ronly == 0) {
789 hmp->ronly = 2; /* special errored read-only mode */
790 hmp->mp->mnt_flag |= MNT_RDONLY;
791 kprintf("HAMMER(%s): Forcing read-only mode\n",
792 hmp->mp->mnt_stat.f_mntfromname);
795 if (hammer_error_panic > 2)
796 Debugger("Entering debugger");
801 * Obtain a vnode for the specified inode number. An exclusively locked
805 hammer_vfs_vget(struct mount *mp, struct vnode *dvp,
806 ino_t ino, struct vnode **vpp)
808 struct hammer_transaction trans;
809 struct hammer_mount *hmp = (void *)mp->mnt_data;
810 struct hammer_inode *ip;
812 u_int32_t localization;
814 hammer_simple_transaction(&trans, hmp);
817 * If a directory vnode is supplied (mainly NFS) then we can acquire
818 * the PFS domain from it. Otherwise we would only be able to vget
819 * inodes in the root PFS.
822 localization = HAMMER_DEF_LOCALIZATION +
823 VTOI(dvp)->obj_localization;
825 localization = HAMMER_DEF_LOCALIZATION;
829 * Lookup the requested HAMMER inode. The structure must be
830 * left unlocked while we manipulate the related vnode to avoid
833 ip = hammer_get_inode(&trans, NULL, ino,
834 hmp->asof, localization,
838 hammer_done_transaction(&trans);
841 error = hammer_get_vnode(ip, vpp);
842 hammer_rel_inode(ip, 0);
843 hammer_done_transaction(&trans);
848 * Return the root vnode for the filesystem.
850 * HAMMER stores the root vnode in the hammer_mount structure so
851 * getting it is easy.
854 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
857 struct hammer_mount *hmp = (void *)mp->mnt_data;
861 error = hammer_vfs_vget(mp, NULL, 1, vpp);
866 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
868 struct hammer_mount *hmp = (void *)mp->mnt_data;
869 hammer_volume_t volume;
870 hammer_volume_ondisk_t ondisk;
875 volume = hammer_get_root_volume(hmp, &error);
878 ondisk = volume->ondisk;
883 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved);
884 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes;
885 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
886 hammer_rel_volume(volume, 0);
888 mp->mnt_stat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE;
889 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
890 if (mp->mnt_stat.f_files < 0)
891 mp->mnt_stat.f_files = 0;
898 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
900 struct hammer_mount *hmp = (void *)mp->mnt_data;
901 hammer_volume_t volume;
902 hammer_volume_ondisk_t ondisk;
907 volume = hammer_get_root_volume(hmp, &error);
910 ondisk = volume->ondisk;
915 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved);
916 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes;
917 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
918 hammer_rel_volume(volume, 0);
920 mp->mnt_vstat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE;
921 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree;
922 if (mp->mnt_vstat.f_files < 0)
923 mp->mnt_vstat.f_files = 0;
924 *sbp = mp->mnt_vstat;
929 * Sync the filesystem. Currently we have to run it twice, the second
930 * one will advance the undo start index to the end index, so if a crash
931 * occurs no undos will be run on mount.
933 * We do not sync the filesystem if we are called from a panic. If we did
934 * we might end up blowing up a sync that was already in progress.
937 hammer_vfs_sync(struct mount *mp, int waitfor)
939 struct hammer_mount *hmp = (void *)mp->mnt_data;
942 if (panicstr == NULL) {
943 error = hammer_sync_hmp(hmp, waitfor);
951 * Convert a vnode to a file handle.
954 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp)
958 KKASSERT(MAXFIDSZ >= 16);
960 fhp->fid_len = offsetof(struct fid, fid_data[16]);
961 fhp->fid_ext = ip->obj_localization >> 16;
962 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id));
963 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof));
969 * Convert a file handle back to a vnode.
971 * Use rootvp to enforce PFS isolation when a PFS is exported via a
975 hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
976 struct fid *fhp, struct vnode **vpp)
978 struct hammer_transaction trans;
979 struct hammer_inode *ip;
980 struct hammer_inode_info info;
982 u_int32_t localization;
984 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id));
985 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof));
987 localization = VTOI(rootvp)->obj_localization;
989 localization = (u_int32_t)fhp->fid_ext << 16;
991 hammer_simple_transaction(&trans, (void *)mp->mnt_data);
994 * Get/allocate the hammer_inode structure. The structure must be
995 * unlocked while we manipulate the related vnode to avoid a
998 ip = hammer_get_inode(&trans, NULL, info.obj_id,
999 info.obj_asof, localization, 0, &error);
1004 error = hammer_get_vnode(ip, vpp);
1005 hammer_rel_inode(ip, 0);
1006 hammer_done_transaction(&trans);
1011 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
1012 int *exflagsp, struct ucred **credanonp)
1014 hammer_mount_t hmp = (void *)mp->mnt_data;
1018 np = vfs_export_lookup(mp, &hmp->export, nam);
1020 *exflagsp = np->netc_exflags;
1021 *credanonp = &np->netc_anon;
1031 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export)
1033 hammer_mount_t hmp = (void *)mp->mnt_data;
1037 case MOUNTCTL_SET_EXPORT:
1038 error = vfs_export(mp, &hmp->export, export);