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 */
316 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot.
319 if ((error = bdevvp(rootdev, &devvp))) {
320 kprintf("hammer_mountroot: can't find devvp\n");
323 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */
324 bzero(&info, sizeof(info));
329 if ((error = copyin(data, &info, sizeof(info))) != 0)
334 * updating or new mount
336 if (mp->mnt_flag & MNT_UPDATE) {
337 hmp = (void *)mp->mnt_data;
338 KKASSERT(hmp != NULL);
340 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
346 * master-id validation. The master id may not be changed by a
349 if (info.hflags & HMNT_MASTERID) {
350 if (hmp && hmp->master_id != info.master_id) {
351 kprintf("hammer: cannot change master id "
352 "with mount update\n");
355 master_id = info.master_id;
356 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS)
360 master_id = hmp->master_id;
366 * Interal mount data structure
369 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
370 mp->mnt_data = (qaddr_t)hmp;
372 /*TAILQ_INIT(&hmp->recycle_list);*/
375 * Make sure kmalloc type limits are set appropriately. If root
376 * increases the vnode limit you may have to do a dummy remount
377 * to adjust the HAMMER inode limit.
379 kmalloc_create(&hmp->m_misc, "HAMMER-others");
380 kmalloc_create(&hmp->m_inodes, "HAMMER-inodes");
382 maxinodes = desiredvnodes + desiredvnodes / 5 +
383 hammer_limit_reclaim * 2;
384 kmalloc_raise_limit(hmp->m_inodes,
385 maxinodes * sizeof(struct hammer_inode));
387 hmp->root_btree_beg.localization = 0x00000000U;
388 hmp->root_btree_beg.obj_id = -0x8000000000000000LL;
389 hmp->root_btree_beg.key = -0x8000000000000000LL;
390 hmp->root_btree_beg.create_tid = 1;
391 hmp->root_btree_beg.delete_tid = 1;
392 hmp->root_btree_beg.rec_type = 0;
393 hmp->root_btree_beg.obj_type = 0;
395 hmp->root_btree_end.localization = 0xFFFFFFFFU;
396 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL;
397 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL;
398 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL;
399 hmp->root_btree_end.delete_tid = 0; /* special case */
400 hmp->root_btree_end.rec_type = 0xFFFFU;
401 hmp->root_btree_end.obj_type = 0;
403 hmp->krate.freq = 1; /* maximum reporting rate (hz) */
404 hmp->krate.count = -16; /* initial burst */
406 hmp->sync_lock.refs = 1;
407 hmp->free_lock.refs = 1;
408 hmp->undo_lock.refs = 1;
409 hmp->blkmap_lock.refs = 1;
410 hmp->snapshot_lock.refs = 1;
412 TAILQ_INIT(&hmp->delay_list);
413 TAILQ_INIT(&hmp->flush_group_list);
414 TAILQ_INIT(&hmp->objid_cache_list);
415 TAILQ_INIT(&hmp->undo_lru_list);
416 TAILQ_INIT(&hmp->reclaim_list);
418 hmp->hflags &= ~HMNT_USERFLAGS;
419 hmp->hflags |= info.hflags & HMNT_USERFLAGS;
421 hmp->master_id = master_id;
424 mp->mnt_flag |= MNT_RDONLY;
425 hmp->asof = info.asof;
427 hmp->asof = HAMMER_MAX_TID;
431 * Re-open read-write if originally read-only, or vise-versa.
433 * When going from read-only to read-write execute the stage2
434 * recovery if it has not already been run.
436 if (mp->mnt_flag & MNT_UPDATE) {
438 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
439 kprintf("HAMMER read-only -> read-write\n");
441 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
442 hammer_adjust_volume_mode, NULL);
443 rootvol = hammer_get_root_volume(hmp, &error);
445 hammer_recover_flush_buffers(hmp, rootvol, 1);
446 error = hammer_recover_stage2(hmp, rootvol);
447 bcopy(rootvol->ondisk->vol0_blockmap,
449 sizeof(hmp->blockmap));
450 hammer_rel_volume(rootvol, 0);
452 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
453 hammer_reload_inode, NULL);
454 /* kernel clears MNT_RDONLY */
455 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
456 kprintf("HAMMER read-write -> read-only\n");
457 hmp->ronly = 1; /* messy */
458 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
459 hammer_reload_inode, NULL);
461 hammer_flusher_sync(hmp);
462 hammer_flusher_sync(hmp);
463 hammer_flusher_sync(hmp);
465 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
466 hammer_adjust_volume_mode, NULL);
471 RB_INIT(&hmp->rb_vols_root);
472 RB_INIT(&hmp->rb_inos_root);
473 RB_INIT(&hmp->rb_nods_root);
474 RB_INIT(&hmp->rb_undo_root);
475 RB_INIT(&hmp->rb_resv_root);
476 RB_INIT(&hmp->rb_bufs_root);
477 RB_INIT(&hmp->rb_pfsm_root);
479 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
481 TAILQ_INIT(&hmp->volu_list);
482 TAILQ_INIT(&hmp->undo_list);
483 TAILQ_INIT(&hmp->data_list);
484 TAILQ_INIT(&hmp->meta_list);
485 TAILQ_INIT(&hmp->lose_list);
490 path = objcache_get(namei_oc, M_WAITOK);
492 for (i = 0; i < info.nvolumes; ++i) {
496 * Only one volume; and no need for copyin.
498 KKASSERT(info.nvolumes == 1);
499 ksnprintf(path, MAXPATHLEN, "/dev/%s",
500 mp->mnt_stat.f_mntfromname);
503 error = copyin(&info.volumes[i], &upath,
506 error = copyinstr(upath, path,
510 error = hammer_install_volume(hmp, path, devvp);
514 objcache_put(namei_oc, path);
517 * Make sure we found a root volume
519 if (error == 0 && hmp->rootvol == NULL) {
520 kprintf("hammer_mount: No root volume found!\n");
525 * Check that all required volumes are available
527 if (error == 0 && hammer_mountcheck_volumes(hmp)) {
528 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
538 * No errors, setup enough of the mount point so we can lookup the
541 mp->mnt_iosize_max = MAXPHYS;
542 mp->mnt_kern_flag |= MNTK_FSMID;
545 * note: f_iosize is used by vnode_pager_haspage() when constructing
548 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
549 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE;
551 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE;
552 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE;
554 mp->mnt_maxsymlinklen = 255;
555 mp->mnt_flag |= MNT_LOCAL;
557 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
558 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops);
559 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops);
562 * The root volume's ondisk pointer is only valid if we hold a
565 rootvol = hammer_get_root_volume(hmp, &error);
570 * Perform any necessary UNDO operations. The recovery code does
571 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
572 * and then re-copy it again after recovery is complete.
574 * If this is a read-only mount the UNDO information is retained
575 * in memory in the form of dirty buffer cache buffers, and not
576 * written back to the media.
578 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
579 sizeof(hmp->blockmap));
582 * Check filesystem version
584 hmp->version = rootvol->ondisk->vol_version;
585 if (hmp->version < HAMMER_VOL_VERSION_MIN ||
586 hmp->version > HAMMER_VOL_VERSION_MAX) {
587 kprintf("HAMMER: mount unsupported fs version %d\n",
594 * The undo_rec_limit limits the size of flush groups to avoid
595 * blowing out the UNDO FIFO. This calculation is typically in
596 * the tens of thousands and is designed primarily when small
597 * HAMMER filesystems are created.
599 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100;
600 if (hammer_debug_general & 0x0001)
601 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit);
604 * NOTE: Recover stage1 not only handles meta-data recovery, it
605 * also sets hmp->undo_seqno for HAMMER VERSION 4+ filesystems.
607 error = hammer_recover_stage1(hmp, rootvol);
609 kprintf("Failed to recover HAMMER filesystem on mount\n");
614 * Finish setup now that we have a good root volume.
616 * The top 16 bits of fsid.val[1] is a pfs id.
618 ksnprintf(mp->mnt_stat.f_mntfromname,
619 sizeof(mp->mnt_stat.f_mntfromname), "%s",
620 rootvol->ondisk->vol_name);
621 mp->mnt_stat.f_fsid.val[0] =
622 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8);
623 mp->mnt_stat.f_fsid.val[1] =
624 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8);
625 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF;
627 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid;
628 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid,
629 sizeof(mp->mnt_vstat.f_fsid_uuid));
632 * Certain often-modified fields in the root volume are cached in
633 * the hammer_mount structure so we do not have to generate lots
634 * of little UNDO structures for them.
636 * Recopy after recovery. This also has the side effect of
637 * setting our cached undo FIFO's first_offset, which serves to
638 * placemark the FIFO start for the NEXT flush cycle while the
639 * on-disk first_offset represents the LAST flush cycle.
641 hmp->next_tid = rootvol->ondisk->vol0_next_tid;
642 hmp->flush_tid1 = hmp->next_tid;
643 hmp->flush_tid2 = hmp->next_tid;
644 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
645 sizeof(hmp->blockmap));
646 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks;
648 hammer_flusher_create(hmp);
651 * Locate the root directory using the root cluster's B-Tree as a
652 * starting point. The root directory uses an obj_id of 1.
654 * FUTURE: Leave the root directory cached referenced but unlocked
655 * in hmp->rootvp (need to flush it on unmount).
657 error = hammer_vfs_vget(mp, NULL, 1, &rootvp);
661 /*vn_unlock(hmp->rootvp);*/
663 error = hammer_recover_stage2(hmp, rootvol);
666 hammer_rel_volume(rootvol, 0);
669 * Cleanup and return.
677 hammer_vfs_unmount(struct mount *mp, int mntflags)
680 struct hammer_mount *hmp = (void *)mp->mnt_data;
686 * Clean out the vnodes
689 if (mntflags & MNT_FORCE)
691 if ((error = vflush(mp, 0, flags)) != 0)
695 * Clean up the internal mount structure and related entities. This
703 * Clean up the internal mount structure and disassociate it from the mount.
704 * This may issue I/O.
707 hammer_free_hmp(struct mount *mp)
709 struct hammer_mount *hmp = (void *)mp->mnt_data;
710 hammer_flush_group_t flg;
715 * Flush anything dirty. This won't even run if the
716 * filesystem errored-out.
719 while (hammer_flusher_haswork(hmp)) {
720 hammer_flusher_sync(hmp);
724 kprintf("HAMMER: umount flushing.");
727 tsleep(&dummy, 0, "hmrufl", hz);
730 kprintf("giving up\n");
734 if (count >= 5 && count < 30)
738 * If the mount had a critical error we have to destroy any
739 * remaining inodes before we can finish cleaning up the flusher.
741 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) {
742 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
743 hammer_destroy_inode_callback, NULL);
747 * There shouldn't be any inodes left now and any left over
748 * flush groups should now be empty.
750 KKASSERT(RB_EMPTY(&hmp->rb_inos_root));
751 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) {
752 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry);
753 KKASSERT(RB_EMPTY(&flg->flush_tree));
755 kprintf("HAMMER: Warning, flush_group %p was "
756 "not empty on umount!\n", flg);
758 kfree(flg, hmp->m_misc);
762 * We can finally destroy the flusher
764 hammer_flusher_destroy(hmp);
767 * We may have held recovered buffers due to a read-only mount.
768 * These must be discarded.
771 hammer_recover_flush_buffers(hmp, NULL, -1);
774 * Unload buffers and then volumes
776 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
777 hammer_unload_buffer, NULL);
778 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
779 hammer_unload_volume, NULL);
782 mp->mnt_flag &= ~MNT_LOCAL;
784 hammer_destroy_objid_cache(hmp);
785 kmalloc_destroy(&hmp->m_misc);
786 kmalloc_destroy(&hmp->m_inodes);
787 kfree(hmp, M_HAMMER);
791 * Report critical errors. ip may be NULL.
794 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip,
795 int error, const char *msg)
797 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR;
799 krateprintf(&hmp->krate,
800 "HAMMER(%s): Critical error inode=%jd error=%d %s\n",
801 hmp->mp->mnt_stat.f_mntfromname,
802 (intmax_t)(ip ? ip->obj_id : -1),
805 if (hmp->ronly == 0) {
806 hmp->ronly = 2; /* special errored read-only mode */
807 hmp->mp->mnt_flag |= MNT_RDONLY;
808 kprintf("HAMMER(%s): Forcing read-only mode\n",
809 hmp->mp->mnt_stat.f_mntfromname);
812 if (hammer_debug_critical)
813 Debugger("Entering debugger");
818 * Obtain a vnode for the specified inode number. An exclusively locked
822 hammer_vfs_vget(struct mount *mp, struct vnode *dvp,
823 ino_t ino, struct vnode **vpp)
825 struct hammer_transaction trans;
826 struct hammer_mount *hmp = (void *)mp->mnt_data;
827 struct hammer_inode *ip;
829 u_int32_t localization;
831 hammer_simple_transaction(&trans, hmp);
834 * If a directory vnode is supplied (mainly NFS) then we can acquire
835 * the PFS domain from it. Otherwise we would only be able to vget
836 * inodes in the root PFS.
839 localization = HAMMER_DEF_LOCALIZATION +
840 VTOI(dvp)->obj_localization;
842 localization = HAMMER_DEF_LOCALIZATION;
846 * Lookup the requested HAMMER inode. The structure must be
847 * left unlocked while we manipulate the related vnode to avoid
850 ip = hammer_get_inode(&trans, NULL, ino,
851 hmp->asof, localization,
855 hammer_done_transaction(&trans);
858 error = hammer_get_vnode(ip, vpp);
859 hammer_rel_inode(ip, 0);
860 hammer_done_transaction(&trans);
865 * Return the root vnode for the filesystem.
867 * HAMMER stores the root vnode in the hammer_mount structure so
868 * getting it is easy.
871 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
874 struct hammer_mount *hmp = (void *)mp->mnt_data;
878 error = hammer_vfs_vget(mp, NULL, 1, vpp);
883 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
885 struct hammer_mount *hmp = (void *)mp->mnt_data;
886 hammer_volume_t volume;
887 hammer_volume_ondisk_t ondisk;
892 volume = hammer_get_root_volume(hmp, &error);
895 ondisk = volume->ondisk;
900 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved);
901 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes;
902 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
903 hammer_rel_volume(volume, 0);
905 mp->mnt_stat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE;
906 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
907 if (mp->mnt_stat.f_files < 0)
908 mp->mnt_stat.f_files = 0;
915 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
917 struct hammer_mount *hmp = (void *)mp->mnt_data;
918 hammer_volume_t volume;
919 hammer_volume_ondisk_t ondisk;
924 volume = hammer_get_root_volume(hmp, &error);
927 ondisk = volume->ondisk;
932 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved);
933 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes;
934 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
935 hammer_rel_volume(volume, 0);
937 mp->mnt_vstat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE;
938 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree;
939 if (mp->mnt_vstat.f_files < 0)
940 mp->mnt_vstat.f_files = 0;
941 *sbp = mp->mnt_vstat;
946 * Sync the filesystem. Currently we have to run it twice, the second
947 * one will advance the undo start index to the end index, so if a crash
948 * occurs no undos will be run on mount.
950 * We do not sync the filesystem if we are called from a panic. If we did
951 * we might end up blowing up a sync that was already in progress.
954 hammer_vfs_sync(struct mount *mp, int waitfor)
956 struct hammer_mount *hmp = (void *)mp->mnt_data;
959 if (panicstr == NULL) {
960 error = hammer_sync_hmp(hmp, waitfor);
968 * Convert a vnode to a file handle.
971 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp)
975 KKASSERT(MAXFIDSZ >= 16);
977 fhp->fid_len = offsetof(struct fid, fid_data[16]);
978 fhp->fid_ext = ip->obj_localization >> 16;
979 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id));
980 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof));
986 * Convert a file handle back to a vnode.
988 * Use rootvp to enforce PFS isolation when a PFS is exported via a
992 hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
993 struct fid *fhp, struct vnode **vpp)
995 struct hammer_transaction trans;
996 struct hammer_inode *ip;
997 struct hammer_inode_info info;
999 u_int32_t localization;
1001 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id));
1002 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof));
1004 localization = VTOI(rootvp)->obj_localization;
1006 localization = (u_int32_t)fhp->fid_ext << 16;
1008 hammer_simple_transaction(&trans, (void *)mp->mnt_data);
1011 * Get/allocate the hammer_inode structure. The structure must be
1012 * unlocked while we manipulate the related vnode to avoid a
1015 ip = hammer_get_inode(&trans, NULL, info.obj_id,
1016 info.obj_asof, localization, 0, &error);
1021 error = hammer_get_vnode(ip, vpp);
1022 hammer_rel_inode(ip, 0);
1023 hammer_done_transaction(&trans);
1028 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
1029 int *exflagsp, struct ucred **credanonp)
1031 hammer_mount_t hmp = (void *)mp->mnt_data;
1035 np = vfs_export_lookup(mp, &hmp->export, nam);
1037 *exflagsp = np->netc_exflags;
1038 *credanonp = &np->netc_anon;
1048 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export)
1050 hammer_mount_t hmp = (void *)mp->mnt_data;
1054 case MOUNTCTL_SET_EXPORT:
1055 error = vfs_export(mp, &hmp->export, export);