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 int hammer_debug_general;
52 int hammer_debug_debug = 1; /* medium-error panics */
53 int hammer_debug_inode;
54 int hammer_debug_locks;
55 int hammer_debug_btree;
57 int hammer_debug_recover; /* -1 will disable, +1 will force */
58 int hammer_debug_recover_faults;
59 int hammer_cluster_enable = 1; /* enable read clustering by default */
60 int hammer_count_fsyncs;
61 int hammer_count_inodes;
62 int hammer_count_iqueued;
63 int hammer_count_reclaiming;
64 int hammer_count_records;
65 int hammer_count_record_datas;
66 int hammer_count_volumes;
67 int hammer_count_buffers;
68 int hammer_count_nodes;
69 int64_t hammer_count_extra_space_used;
70 int64_t hammer_stats_btree_lookups;
71 int64_t hammer_stats_btree_searches;
72 int64_t hammer_stats_btree_inserts;
73 int64_t hammer_stats_btree_deletes;
74 int64_t hammer_stats_btree_elements;
75 int64_t hammer_stats_btree_splits;
76 int64_t hammer_stats_btree_iterations;
77 int64_t hammer_stats_record_iterations;
79 int64_t hammer_stats_file_read;
80 int64_t hammer_stats_file_write;
81 int64_t hammer_stats_file_iopsr;
82 int64_t hammer_stats_file_iopsw;
83 int64_t hammer_stats_disk_read;
84 int64_t hammer_stats_disk_write;
85 int64_t hammer_stats_inode_flushes;
86 int64_t hammer_stats_commits;
88 int hammer_count_dirtybufspace; /* global */
89 int hammer_count_refedbufs; /* global */
90 int hammer_count_reservations;
91 int hammer_count_io_running_read;
92 int hammer_count_io_running_write;
93 int hammer_count_io_locked;
94 int hammer_limit_dirtybufspace; /* per-mount */
95 int hammer_limit_recs; /* as a whole XXX */
96 int hammer_autoflush = 2000; /* auto flush */
98 int hammer_verify_zone;
99 int hammer_verify_data = 1;
100 int hammer_write_mode;
101 int64_t hammer_contention_count;
102 int64_t hammer_zone_limit;
104 SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem");
105 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW,
106 &hammer_debug_general, 0, "");
107 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW,
108 &hammer_debug_io, 0, "");
109 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW,
110 &hammer_debug_debug, 0, "");
111 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW,
112 &hammer_debug_inode, 0, "");
113 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW,
114 &hammer_debug_locks, 0, "");
115 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW,
116 &hammer_debug_btree, 0, "");
117 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW,
118 &hammer_debug_tid, 0, "");
119 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW,
120 &hammer_debug_recover, 0, "");
121 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW,
122 &hammer_debug_recover_faults, 0, "");
123 SYSCTL_INT(_vfs_hammer, OID_AUTO, cluster_enable, CTLFLAG_RW,
124 &hammer_cluster_enable, 0, "");
126 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_dirtybufspace, CTLFLAG_RW,
127 &hammer_limit_dirtybufspace, 0, "");
128 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW,
129 &hammer_limit_recs, 0, "");
131 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_fsyncs, CTLFLAG_RD,
132 &hammer_count_fsyncs, 0, "");
133 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD,
134 &hammer_count_inodes, 0, "");
135 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD,
136 &hammer_count_iqueued, 0, "");
137 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD,
138 &hammer_count_reclaiming, 0, "");
139 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD,
140 &hammer_count_records, 0, "");
141 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD,
142 &hammer_count_record_datas, 0, "");
143 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD,
144 &hammer_count_volumes, 0, "");
145 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD,
146 &hammer_count_buffers, 0, "");
147 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD,
148 &hammer_count_nodes, 0, "");
149 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, count_extra_space_used, CTLFLAG_RD,
150 &hammer_count_extra_space_used, 0, "");
152 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD,
153 &hammer_stats_btree_searches, 0, "");
154 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD,
155 &hammer_stats_btree_lookups, 0, "");
156 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD,
157 &hammer_stats_btree_inserts, 0, "");
158 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD,
159 &hammer_stats_btree_deletes, 0, "");
160 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD,
161 &hammer_stats_btree_elements, 0, "");
162 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD,
163 &hammer_stats_btree_splits, 0, "");
164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD,
165 &hammer_stats_btree_iterations, 0, "");
166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD,
167 &hammer_stats_record_iterations, 0, "");
169 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_read, CTLFLAG_RD,
170 &hammer_stats_file_read, 0, "");
171 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_write, CTLFLAG_RD,
172 &hammer_stats_file_write, 0, "");
173 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsr, CTLFLAG_RD,
174 &hammer_stats_file_iopsr, 0, "");
175 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsw, CTLFLAG_RD,
176 &hammer_stats_file_iopsw, 0, "");
177 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_read, CTLFLAG_RD,
178 &hammer_stats_disk_read, 0, "");
179 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_write, CTLFLAG_RD,
180 &hammer_stats_disk_write, 0, "");
181 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_inode_flushes, CTLFLAG_RD,
182 &hammer_stats_inode_flushes, 0, "");
183 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_commits, CTLFLAG_RD,
184 &hammer_stats_commits, 0, "");
186 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD,
187 &hammer_count_dirtybufspace, 0, "");
188 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD,
189 &hammer_count_refedbufs, 0, "");
190 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD,
191 &hammer_count_reservations, 0, "");
192 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD,
193 &hammer_count_io_running_read, 0, "");
194 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD,
195 &hammer_count_io_locked, 0, "");
196 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD,
197 &hammer_count_io_running_write, 0, "");
198 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW,
199 &hammer_zone_limit, 0, "");
200 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW,
201 &hammer_contention_count, 0, "");
202 SYSCTL_INT(_vfs_hammer, OID_AUTO, autoflush, CTLFLAG_RW,
203 &hammer_autoflush, 0, "");
204 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW,
205 &hammer_verify_zone, 0, "");
206 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_data, CTLFLAG_RW,
207 &hammer_verify_data, 0, "");
208 SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW,
209 &hammer_write_mode, 0, "");
211 KTR_INFO_MASTER(hammer);
216 static void hammer_free_hmp(struct mount *mp);
218 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data,
220 static int hammer_vfs_unmount(struct mount *mp, int mntflags);
221 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp);
222 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp,
224 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
226 static int hammer_vfs_sync(struct mount *mp, int waitfor);
227 static int hammer_vfs_vget(struct mount *mp, ino_t ino,
229 static int hammer_vfs_init(struct vfsconf *conf);
230 static int hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
231 struct fid *fhp, struct vnode **vpp);
232 static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp);
233 static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
234 int *exflagsp, struct ucred **credanonp);
237 static struct vfsops hammer_vfsops = {
238 .vfs_mount = hammer_vfs_mount,
239 .vfs_unmount = hammer_vfs_unmount,
240 .vfs_root = hammer_vfs_root,
241 .vfs_statfs = hammer_vfs_statfs,
242 .vfs_statvfs = hammer_vfs_statvfs,
243 .vfs_sync = hammer_vfs_sync,
244 .vfs_vget = hammer_vfs_vget,
245 .vfs_init = hammer_vfs_init,
246 .vfs_vptofh = hammer_vfs_vptofh,
247 .vfs_fhtovp = hammer_vfs_fhtovp,
248 .vfs_checkexp = hammer_vfs_checkexp
251 MALLOC_DEFINE(M_HAMMER, "HAMMER-mount", "");
253 VFS_SET(hammer_vfsops, hammer, 0);
254 MODULE_VERSION(hammer, 1);
257 hammer_vfs_init(struct vfsconf *conf)
261 if (hammer_limit_recs == 0) {
262 hammer_limit_recs = nbuf * 25;
263 n = kmalloc_limit(M_HAMMER) / 512;
264 if (hammer_limit_recs > n)
265 hammer_limit_recs = n;
267 if (hammer_limit_dirtybufspace == 0) {
268 hammer_limit_dirtybufspace = hidirtybufspace / 2;
269 if (hammer_limit_dirtybufspace < 100)
270 hammer_limit_dirtybufspace = 100;
276 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data,
279 struct hammer_mount_info info;
281 hammer_volume_t rootvol;
282 struct vnode *rootvp;
283 struct vnode *devvp = NULL;
284 const char *upath; /* volume name in userspace */
285 char *path; /* volume name in system space */
292 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot.
295 if ((error = bdevvp(rootdev, &devvp))) {
296 kprintf("hammer_mountroot: can't find devvp\n");
299 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */
300 bzero(&info, sizeof(info));
305 if ((error = copyin(data, &info, sizeof(info))) != 0)
310 * updating or new mount
312 if (mp->mnt_flag & MNT_UPDATE) {
313 hmp = (void *)mp->mnt_data;
314 KKASSERT(hmp != NULL);
316 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
322 * master-id validation. The master id may not be changed by a
325 if (info.hflags & HMNT_MASTERID) {
326 if (hmp && hmp->master_id != info.master_id) {
327 kprintf("hammer: cannot change master id "
328 "with mount update\n");
331 master_id = info.master_id;
332 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS)
336 master_id = hmp->master_id;
342 * Interal mount data structure
345 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
346 mp->mnt_data = (qaddr_t)hmp;
348 /*TAILQ_INIT(&hmp->recycle_list);*/
351 * Make sure kmalloc type limits are set appropriately. If root
352 * increases the vnode limit you may have to do a dummy remount
353 * to adjust the HAMMER inode limit.
355 kmalloc_create(&hmp->m_misc, "HAMMER-others");
356 kmalloc_create(&hmp->m_inodes, "HAMMER-inodes");
358 maxinodes = desiredvnodes + desiredvnodes / 5 +
360 kmalloc_raise_limit(hmp->m_inodes,
361 maxinodes * sizeof(struct hammer_inode));
363 hmp->root_btree_beg.localization = 0x00000000U;
364 hmp->root_btree_beg.obj_id = -0x8000000000000000LL;
365 hmp->root_btree_beg.key = -0x8000000000000000LL;
366 hmp->root_btree_beg.create_tid = 1;
367 hmp->root_btree_beg.delete_tid = 1;
368 hmp->root_btree_beg.rec_type = 0;
369 hmp->root_btree_beg.obj_type = 0;
371 hmp->root_btree_end.localization = 0xFFFFFFFFU;
372 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL;
373 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL;
374 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL;
375 hmp->root_btree_end.delete_tid = 0; /* special case */
376 hmp->root_btree_end.rec_type = 0xFFFFU;
377 hmp->root_btree_end.obj_type = 0;
379 hmp->krate.freq = 1; /* maximum reporting rate (hz) */
380 hmp->krate.count = -16; /* initial burst */
382 hmp->sync_lock.refs = 1;
383 hmp->free_lock.refs = 1;
384 hmp->undo_lock.refs = 1;
385 hmp->blkmap_lock.refs = 1;
387 TAILQ_INIT(&hmp->delay_list);
388 TAILQ_INIT(&hmp->flush_group_list);
389 TAILQ_INIT(&hmp->objid_cache_list);
390 TAILQ_INIT(&hmp->undo_lru_list);
391 TAILQ_INIT(&hmp->reclaim_list);
393 hmp->hflags &= ~HMNT_USERFLAGS;
394 hmp->hflags |= info.hflags & HMNT_USERFLAGS;
396 hmp->master_id = master_id;
399 mp->mnt_flag |= MNT_RDONLY;
400 hmp->asof = info.asof;
402 hmp->asof = HAMMER_MAX_TID;
406 * Re-open read-write if originally read-only, or vise-versa.
408 if (mp->mnt_flag & MNT_UPDATE) {
410 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
411 kprintf("HAMMER read-only -> read-write\n");
413 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
414 hammer_adjust_volume_mode, NULL);
415 rootvol = hammer_get_root_volume(hmp, &error);
417 hammer_recover_flush_buffers(hmp, rootvol, 1);
418 bcopy(rootvol->ondisk->vol0_blockmap,
420 sizeof(hmp->blockmap));
421 hammer_rel_volume(rootvol, 0);
423 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
424 hammer_reload_inode, NULL);
425 /* kernel clears MNT_RDONLY */
426 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
427 kprintf("HAMMER read-write -> read-only\n");
428 hmp->ronly = 1; /* messy */
429 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
430 hammer_reload_inode, NULL);
432 hammer_flusher_sync(hmp);
433 hammer_flusher_sync(hmp);
434 hammer_flusher_sync(hmp);
436 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
437 hammer_adjust_volume_mode, NULL);
442 RB_INIT(&hmp->rb_vols_root);
443 RB_INIT(&hmp->rb_inos_root);
444 RB_INIT(&hmp->rb_nods_root);
445 RB_INIT(&hmp->rb_undo_root);
446 RB_INIT(&hmp->rb_resv_root);
447 RB_INIT(&hmp->rb_bufs_root);
448 RB_INIT(&hmp->rb_pfsm_root);
450 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
452 TAILQ_INIT(&hmp->volu_list);
453 TAILQ_INIT(&hmp->undo_list);
454 TAILQ_INIT(&hmp->data_list);
455 TAILQ_INIT(&hmp->meta_list);
456 TAILQ_INIT(&hmp->lose_list);
461 path = objcache_get(namei_oc, M_WAITOK);
463 for (i = 0; i < info.nvolumes; ++i) {
467 * Only one volume; and no need for copyin.
469 KKASSERT(info.nvolumes == 1);
470 ksnprintf(path, MAXPATHLEN, "/dev/%s",
471 mp->mnt_stat.f_mntfromname);
474 error = copyin(&info.volumes[i], &upath,
477 error = copyinstr(upath, path,
481 error = hammer_install_volume(hmp, path, devvp);
485 objcache_put(namei_oc, path);
488 * Make sure we found a root volume
490 if (error == 0 && hmp->rootvol == NULL) {
491 kprintf("hammer_mount: No root volume found!\n");
496 * Check that all required volumes are available
498 if (error == 0 && hammer_mountcheck_volumes(hmp)) {
499 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
509 * No errors, setup enough of the mount point so we can lookup the
512 mp->mnt_iosize_max = MAXPHYS;
513 mp->mnt_kern_flag |= MNTK_FSMID;
516 * note: f_iosize is used by vnode_pager_haspage() when constructing
519 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
520 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE;
522 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE;
523 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE;
525 mp->mnt_maxsymlinklen = 255;
526 mp->mnt_flag |= MNT_LOCAL;
528 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
529 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops);
530 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops);
533 * The root volume's ondisk pointer is only valid if we hold a
536 rootvol = hammer_get_root_volume(hmp, &error);
541 * Perform any necessary UNDO operations. The recovery code does
542 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
543 * and then re-copy it again after recovery is complete.
545 * If this is a read-only mount the UNDO information is retained
546 * in memory in the form of dirty buffer cache buffers, and not
547 * written back to the media.
549 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
550 sizeof(hmp->blockmap));
553 * Check filesystem version
555 hmp->version = rootvol->ondisk->vol_version;
556 if (hmp->version < HAMMER_VOL_VERSION_MIN ||
557 hmp->version > HAMMER_VOL_VERSION_MAX) {
558 kprintf("HAMMER: mount unsupported fs version %d\n",
565 * The undo_rec_limit limits the size of flush groups to avoid
566 * blowing out the UNDO FIFO. This calculation is typically in
567 * the tens of thousands and is designed primarily when small
568 * HAMMER filesystems are created.
570 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100;
571 if (hammer_debug_general & 0x0001)
572 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit);
574 error = hammer_recover(hmp, rootvol);
576 kprintf("Failed to recover HAMMER filesystem on mount\n");
581 * Finish setup now that we have a good root volume.
583 * The top 16 bits of fsid.val[1] is a pfs id.
585 ksnprintf(mp->mnt_stat.f_mntfromname,
586 sizeof(mp->mnt_stat.f_mntfromname), "%s",
587 rootvol->ondisk->vol_name);
588 mp->mnt_stat.f_fsid.val[0] =
589 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8);
590 mp->mnt_stat.f_fsid.val[1] =
591 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8);
592 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF;
594 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid;
595 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid,
596 sizeof(mp->mnt_vstat.f_fsid_uuid));
599 * Certain often-modified fields in the root volume are cached in
600 * the hammer_mount structure so we do not have to generate lots
601 * of little UNDO structures for them.
603 * Recopy after recovery. This also has the side effect of
604 * setting our cached undo FIFO's first_offset, which serves to
605 * placemark the FIFO start for the NEXT flush cycle while the
606 * on-disk first_offset represents the LAST flush cycle.
608 hmp->next_tid = rootvol->ondisk->vol0_next_tid;
609 hmp->flush_tid1 = hmp->next_tid;
610 hmp->flush_tid2 = hmp->next_tid;
611 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
612 sizeof(hmp->blockmap));
613 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks;
615 hammer_flusher_create(hmp);
618 * Locate the root directory using the root cluster's B-Tree as a
619 * starting point. The root directory uses an obj_id of 1.
621 * FUTURE: Leave the root directory cached referenced but unlocked
622 * in hmp->rootvp (need to flush it on unmount).
624 error = hammer_vfs_vget(mp, 1, &rootvp);
628 /*vn_unlock(hmp->rootvp);*/
631 hammer_rel_volume(rootvol, 0);
634 * Cleanup and return.
642 hammer_vfs_unmount(struct mount *mp, int mntflags)
645 struct hammer_mount *hmp = (void *)mp->mnt_data;
651 * Clean out the vnodes
654 if (mntflags & MNT_FORCE)
656 if ((error = vflush(mp, 0, flags)) != 0)
660 * Clean up the internal mount structure and related entities. This
668 * Clean up the internal mount structure and disassociate it from the mount.
669 * This may issue I/O.
672 hammer_free_hmp(struct mount *mp)
674 struct hammer_mount *hmp = (void *)mp->mnt_data;
675 hammer_flush_group_t flg;
679 * Flush anything dirty. This won't even run if the
680 * filesystem errored-out.
683 while (hammer_flusher_haswork(hmp)) {
684 hammer_flusher_sync(hmp);
688 kprintf("HAMMER: umount flushing.");
691 tsleep(hmp, 0, "hmrufl", hz);
694 kprintf("giving up\n");
698 if (count >= 5 && count < 30)
702 * If the mount had a critical error we have to destroy any
703 * remaining inodes before we can finish cleaning up the flusher.
705 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) {
706 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
707 hammer_destroy_inode_callback, NULL);
711 * There shouldn't be any inodes left now and any left over
712 * flush groups should now be empty.
714 KKASSERT(RB_EMPTY(&hmp->rb_inos_root));
715 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) {
716 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry);
717 KKASSERT(TAILQ_EMPTY(&flg->flush_list));
719 kprintf("HAMMER: Warning, flush_group %p was "
720 "not empty on umount!\n", flg);
722 kfree(flg, hmp->m_misc);
726 * We can finally destroy the flusher
728 hammer_flusher_destroy(hmp);
731 * We may have held recovered buffers due to a read-only mount.
732 * These must be discarded.
735 hammer_recover_flush_buffers(hmp, NULL, -1);
738 * Unload buffers and then volumes
740 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
741 hammer_unload_buffer, NULL);
742 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
743 hammer_unload_volume, NULL);
746 mp->mnt_flag &= ~MNT_LOCAL;
748 hammer_destroy_objid_cache(hmp);
749 kmalloc_destroy(&hmp->m_misc);
750 kmalloc_destroy(&hmp->m_inodes);
751 kfree(hmp, M_HAMMER);
755 * Report critical errors. ip may be NULL.
758 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip,
759 int error, const char *msg)
761 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR;
762 krateprintf(&hmp->krate,
763 "HAMMER(%s): Critical error inode=%lld %s\n",
764 hmp->mp->mnt_stat.f_mntfromname,
765 (ip ? ip->obj_id : -1), msg);
766 if (hmp->ronly == 0) {
767 hmp->ronly = 2; /* special errored read-only mode */
768 hmp->mp->mnt_flag |= MNT_RDONLY;
769 kprintf("HAMMER(%s): Forcing read-only mode\n",
770 hmp->mp->mnt_stat.f_mntfromname);
777 * Obtain a vnode for the specified inode number. An exclusively locked
781 hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
783 struct hammer_transaction trans;
784 struct hammer_mount *hmp = (void *)mp->mnt_data;
785 struct hammer_inode *ip;
788 hammer_simple_transaction(&trans, hmp);
791 * Lookup the requested HAMMER inode. The structure must be
792 * left unlocked while we manipulate the related vnode to avoid
795 ip = hammer_get_inode(&trans, NULL, ino,
796 hmp->asof, HAMMER_DEF_LOCALIZATION,
800 hammer_done_transaction(&trans);
803 error = hammer_get_vnode(ip, vpp);
804 hammer_rel_inode(ip, 0);
805 hammer_done_transaction(&trans);
810 * Return the root vnode for the filesystem.
812 * HAMMER stores the root vnode in the hammer_mount structure so
813 * getting it is easy.
816 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
819 struct hammer_mount *hmp = (void *)mp->mnt_data;
823 error = hammer_vfs_vget(mp, 1, vpp);
828 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
830 struct hammer_mount *hmp = (void *)mp->mnt_data;
831 hammer_volume_t volume;
832 hammer_volume_ondisk_t ondisk;
836 volume = hammer_get_root_volume(hmp, &error);
839 ondisk = volume->ondisk;
844 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes;
845 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
846 hammer_rel_volume(volume, 0);
848 mp->mnt_stat.f_bfree = bfree / HAMMER_BUFSIZE;
849 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
850 if (mp->mnt_stat.f_files < 0)
851 mp->mnt_stat.f_files = 0;
858 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
860 struct hammer_mount *hmp = (void *)mp->mnt_data;
861 hammer_volume_t volume;
862 hammer_volume_ondisk_t ondisk;
866 volume = hammer_get_root_volume(hmp, &error);
869 ondisk = volume->ondisk;
874 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes;
875 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
876 hammer_rel_volume(volume, 0);
878 mp->mnt_vstat.f_bfree = bfree / HAMMER_BUFSIZE;
879 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree;
880 if (mp->mnt_vstat.f_files < 0)
881 mp->mnt_vstat.f_files = 0;
882 *sbp = mp->mnt_vstat;
887 * Sync the filesystem. Currently we have to run it twice, the second
888 * one will advance the undo start index to the end index, so if a crash
889 * occurs no undos will be run on mount.
891 * We do not sync the filesystem if we are called from a panic. If we did
892 * we might end up blowing up a sync that was already in progress.
895 hammer_vfs_sync(struct mount *mp, int waitfor)
897 struct hammer_mount *hmp = (void *)mp->mnt_data;
900 if (panicstr == NULL) {
901 error = hammer_sync_hmp(hmp, waitfor);
909 * Convert a vnode to a file handle.
912 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp)
916 KKASSERT(MAXFIDSZ >= 16);
918 fhp->fid_len = offsetof(struct fid, fid_data[16]);
919 fhp->fid_ext = ip->obj_localization >> 16;
920 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id));
921 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof));
927 * Convert a file handle back to a vnode.
929 * Use rootvp to enforce PFS isolation when a PFS is exported via a
933 hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
934 struct fid *fhp, struct vnode **vpp)
936 struct hammer_transaction trans;
937 struct hammer_inode *ip;
938 struct hammer_inode_info info;
940 u_int32_t localization;
942 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id));
943 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof));
945 localization = VTOI(rootvp)->obj_localization;
947 localization = (u_int32_t)fhp->fid_ext << 16;
949 hammer_simple_transaction(&trans, (void *)mp->mnt_data);
952 * Get/allocate the hammer_inode structure. The structure must be
953 * unlocked while we manipulate the related vnode to avoid a
956 ip = hammer_get_inode(&trans, NULL, info.obj_id,
957 info.obj_asof, localization, 0, &error);
962 error = hammer_get_vnode(ip, vpp);
963 hammer_rel_inode(ip, 0);
964 hammer_done_transaction(&trans);
969 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
970 int *exflagsp, struct ucred **credanonp)
972 hammer_mount_t hmp = (void *)mp->mnt_data;
976 np = vfs_export_lookup(mp, &hmp->export, nam);
978 *exflagsp = np->netc_exflags;
979 *credanonp = &np->netc_anon;
989 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export)
991 hammer_mount_t hmp = (void *)mp->mnt_data;
995 case MOUNTCTL_SET_EXPORT:
996 error = vfs_export(mp, &hmp->export, export);