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 = 3;
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 */
323 char *next_volume_ptr = NULL;
326 * Accept hammer_mount_info. mntpt is NULL for root mounts at boot.
329 bzero(&info, sizeof(info));
334 next_volume_ptr = mp->mnt_stat.f_mntfromname;
336 /* Count number of volumes separated by ':' */
337 for (char *p = next_volume_ptr; *p != '\0'; ++p) {
343 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */
345 if ((error = copyin(data, &info, sizeof(info))) != 0)
350 * updating or new mount
352 if (mp->mnt_flag & MNT_UPDATE) {
353 hmp = (void *)mp->mnt_data;
354 KKASSERT(hmp != NULL);
356 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
362 * master-id validation. The master id may not be changed by a
365 if (info.hflags & HMNT_MASTERID) {
366 if (hmp && hmp->master_id != info.master_id) {
367 kprintf("hammer: cannot change master id "
368 "with mount update\n");
371 master_id = info.master_id;
372 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS)
376 master_id = hmp->master_id;
382 * Interal mount data structure
385 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
386 mp->mnt_data = (qaddr_t)hmp;
388 /*TAILQ_INIT(&hmp->recycle_list);*/
391 * Make sure kmalloc type limits are set appropriately.
393 * Our inode kmalloc group is sized based on maxvnodes
394 * (controlled by the system, not us).
396 kmalloc_create(&hmp->m_misc, "HAMMER-others");
397 kmalloc_create(&hmp->m_inodes, "HAMMER-inodes");
399 kmalloc_raise_limit(hmp->m_inodes, 0); /* unlimited */
401 hmp->root_btree_beg.localization = 0x00000000U;
402 hmp->root_btree_beg.obj_id = -0x8000000000000000LL;
403 hmp->root_btree_beg.key = -0x8000000000000000LL;
404 hmp->root_btree_beg.create_tid = 1;
405 hmp->root_btree_beg.delete_tid = 1;
406 hmp->root_btree_beg.rec_type = 0;
407 hmp->root_btree_beg.obj_type = 0;
409 hmp->root_btree_end.localization = 0xFFFFFFFFU;
410 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL;
411 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL;
412 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL;
413 hmp->root_btree_end.delete_tid = 0; /* special case */
414 hmp->root_btree_end.rec_type = 0xFFFFU;
415 hmp->root_btree_end.obj_type = 0;
417 hmp->krate.freq = 1; /* maximum reporting rate (hz) */
418 hmp->krate.count = -16; /* initial burst */
420 hmp->sync_lock.refs = 1;
421 hmp->free_lock.refs = 1;
422 hmp->undo_lock.refs = 1;
423 hmp->blkmap_lock.refs = 1;
424 hmp->snapshot_lock.refs = 1;
425 hmp->volume_lock.refs = 1;
427 TAILQ_INIT(&hmp->delay_list);
428 TAILQ_INIT(&hmp->flush_group_list);
429 TAILQ_INIT(&hmp->objid_cache_list);
430 TAILQ_INIT(&hmp->undo_lru_list);
431 TAILQ_INIT(&hmp->reclaim_list);
433 hmp->hflags &= ~HMNT_USERFLAGS;
434 hmp->hflags |= info.hflags & HMNT_USERFLAGS;
436 hmp->master_id = master_id;
439 mp->mnt_flag |= MNT_RDONLY;
440 hmp->asof = info.asof;
442 hmp->asof = HAMMER_MAX_TID;
445 hmp->volume_to_remove = -1;
448 * Re-open read-write if originally read-only, or vise-versa.
450 * When going from read-only to read-write execute the stage2
451 * recovery if it has not already been run.
453 if (mp->mnt_flag & MNT_UPDATE) {
455 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
456 kprintf("HAMMER read-only -> read-write\n");
458 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
459 hammer_adjust_volume_mode, NULL);
460 rootvol = hammer_get_root_volume(hmp, &error);
462 hammer_recover_flush_buffers(hmp, rootvol, 1);
463 error = hammer_recover_stage2(hmp, rootvol);
464 bcopy(rootvol->ondisk->vol0_blockmap,
466 sizeof(hmp->blockmap));
467 hammer_rel_volume(rootvol, 0);
469 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
470 hammer_reload_inode, NULL);
471 /* kernel clears MNT_RDONLY */
472 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
473 kprintf("HAMMER read-write -> read-only\n");
474 hmp->ronly = 1; /* messy */
475 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
476 hammer_reload_inode, NULL);
478 hammer_flusher_sync(hmp);
479 hammer_flusher_sync(hmp);
480 hammer_flusher_sync(hmp);
482 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
483 hammer_adjust_volume_mode, NULL);
488 RB_INIT(&hmp->rb_vols_root);
489 RB_INIT(&hmp->rb_inos_root);
490 RB_INIT(&hmp->rb_redo_root);
491 RB_INIT(&hmp->rb_nods_root);
492 RB_INIT(&hmp->rb_undo_root);
493 RB_INIT(&hmp->rb_resv_root);
494 RB_INIT(&hmp->rb_bufs_root);
495 RB_INIT(&hmp->rb_pfsm_root);
497 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
499 TAILQ_INIT(&hmp->volu_list);
500 TAILQ_INIT(&hmp->undo_list);
501 TAILQ_INIT(&hmp->data_list);
502 TAILQ_INIT(&hmp->meta_list);
503 TAILQ_INIT(&hmp->lose_list);
504 TAILQ_INIT(&hmp->iorun_list);
509 path = objcache_get(namei_oc, M_WAITOK);
511 for (i = 0; i < info.nvolumes; ++i) {
516 KKASSERT(next_volume_ptr != NULL);
518 if (*next_volume_ptr != '/') {
520 strcpy(path, "/dev/");
523 for (k = strlen(path); k < MAXPATHLEN-1; ++k) {
524 if (*next_volume_ptr == '\0') {
526 } else if (*next_volume_ptr == ':') {
530 path[k] = *next_volume_ptr;
537 cdev_t dev = kgetdiskbyname(path);
538 error = bdevvp(dev, &devvp);
540 kprintf("hammer_mountroot: can't find devvp\n");
543 error = copyin(&info.volumes[i], &upath,
546 error = copyinstr(upath, path,
550 error = hammer_install_volume(hmp, path, devvp);
554 objcache_put(namei_oc, path);
557 * Make sure we found a root volume
559 if (error == 0 && hmp->rootvol == NULL) {
560 kprintf("hammer_mount: No root volume found!\n");
565 * Check that all required volumes are available
567 if (error == 0 && hammer_mountcheck_volumes(hmp)) {
568 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
578 * No errors, setup enough of the mount point so we can lookup the
581 mp->mnt_iosize_max = MAXPHYS;
582 mp->mnt_kern_flag |= MNTK_FSMID;
585 * MPSAFE code. Note that VOPs and VFSops which are not MPSAFE
586 * will acquire a per-mount token prior to entry and release it
587 * on return, so even if we do not specify it we no longer get
588 * the BGL regardlless of how we are flagged.
590 mp->mnt_kern_flag |= MNTK_RD_MPSAFE | MNTK_GA_MPSAFE |
594 * note: f_iosize is used by vnode_pager_haspage() when constructing
597 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
598 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE;
600 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE;
601 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE;
603 mp->mnt_maxsymlinklen = 255;
604 mp->mnt_flag |= MNT_LOCAL;
606 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
607 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops);
608 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops);
611 * The root volume's ondisk pointer is only valid if we hold a
614 rootvol = hammer_get_root_volume(hmp, &error);
619 * Perform any necessary UNDO operations. The recovery code does
620 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
621 * and then re-copy it again after recovery is complete.
623 * If this is a read-only mount the UNDO information is retained
624 * in memory in the form of dirty buffer cache buffers, and not
625 * written back to the media.
627 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
628 sizeof(hmp->blockmap));
631 * Check filesystem version
633 hmp->version = rootvol->ondisk->vol_version;
634 if (hmp->version < HAMMER_VOL_VERSION_MIN ||
635 hmp->version > HAMMER_VOL_VERSION_MAX) {
636 kprintf("HAMMER: mount unsupported fs version %d\n",
643 * The undo_rec_limit limits the size of flush groups to avoid
644 * blowing out the UNDO FIFO. This calculation is typically in
645 * the tens of thousands and is designed primarily when small
646 * HAMMER filesystems are created.
648 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100;
649 if (hammer_debug_general & 0x0001)
650 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit);
653 * NOTE: Recover stage1 not only handles meta-data recovery, it
654 * also sets hmp->undo_seqno for HAMMER VERSION 4+ filesystems.
656 error = hammer_recover_stage1(hmp, rootvol);
658 kprintf("Failed to recover HAMMER filesystem on mount\n");
663 * Finish setup now that we have a good root volume.
665 * The top 16 bits of fsid.val[1] is a pfs id.
667 ksnprintf(mp->mnt_stat.f_mntfromname,
668 sizeof(mp->mnt_stat.f_mntfromname), "%s",
669 rootvol->ondisk->vol_name);
670 mp->mnt_stat.f_fsid.val[0] =
671 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8);
672 mp->mnt_stat.f_fsid.val[1] =
673 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8);
674 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF;
676 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid;
677 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid,
678 sizeof(mp->mnt_vstat.f_fsid_uuid));
681 * Certain often-modified fields in the root volume are cached in
682 * the hammer_mount structure so we do not have to generate lots
683 * of little UNDO structures for them.
685 * Recopy after recovery. This also has the side effect of
686 * setting our cached undo FIFO's first_offset, which serves to
687 * placemark the FIFO start for the NEXT flush cycle while the
688 * on-disk first_offset represents the LAST flush cycle.
690 hmp->next_tid = rootvol->ondisk->vol0_next_tid;
691 hmp->flush_tid1 = hmp->next_tid;
692 hmp->flush_tid2 = hmp->next_tid;
693 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
694 sizeof(hmp->blockmap));
695 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks;
697 hammer_flusher_create(hmp);
700 * Locate the root directory using the root cluster's B-Tree as a
701 * starting point. The root directory uses an obj_id of 1.
703 * FUTURE: Leave the root directory cached referenced but unlocked
704 * in hmp->rootvp (need to flush it on unmount).
706 error = hammer_vfs_vget(mp, NULL, 1, &rootvp);
710 /*vn_unlock(hmp->rootvp);*/
712 error = hammer_recover_stage2(hmp, rootvol);
715 hammer_rel_volume(rootvol, 0);
718 * Cleanup and return.
726 hammer_vfs_unmount(struct mount *mp, int mntflags)
729 struct hammer_mount *hmp = (void *)mp->mnt_data;
735 * Clean out the vnodes
738 if (mntflags & MNT_FORCE)
740 if ((error = vflush(mp, 0, flags)) != 0)
744 * Clean up the internal mount structure and related entities. This
752 * Clean up the internal mount structure and disassociate it from the mount.
753 * This may issue I/O.
756 hammer_free_hmp(struct mount *mp)
758 struct hammer_mount *hmp = (void *)mp->mnt_data;
759 hammer_flush_group_t flg;
764 * Flush anything dirty. This won't even run if the
765 * filesystem errored-out.
768 while (hammer_flusher_haswork(hmp)) {
769 hammer_flusher_sync(hmp);
773 kprintf("HAMMER: umount flushing.");
776 tsleep(&dummy, 0, "hmrufl", hz);
779 kprintf("giving up\n");
783 if (count >= 5 && count < 30)
787 * If the mount had a critical error we have to destroy any
788 * remaining inodes before we can finish cleaning up the flusher.
790 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) {
791 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
792 hammer_destroy_inode_callback, NULL);
796 * There shouldn't be any inodes left now and any left over
797 * flush groups should now be empty.
799 KKASSERT(RB_EMPTY(&hmp->rb_inos_root));
800 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) {
801 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry);
802 KKASSERT(RB_EMPTY(&flg->flush_tree));
804 kprintf("HAMMER: Warning, flush_group %p was "
805 "not empty on umount!\n", flg);
807 kfree(flg, hmp->m_misc);
811 * We can finally destroy the flusher
813 hammer_flusher_destroy(hmp);
816 * We may have held recovered buffers due to a read-only mount.
817 * These must be discarded.
820 hammer_recover_flush_buffers(hmp, NULL, -1);
823 * Unload buffers and then volumes
825 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
826 hammer_unload_buffer, NULL);
827 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
828 hammer_unload_volume, NULL);
831 mp->mnt_flag &= ~MNT_LOCAL;
833 hammer_destroy_objid_cache(hmp);
834 kmalloc_destroy(&hmp->m_misc);
835 kmalloc_destroy(&hmp->m_inodes);
836 kfree(hmp, M_HAMMER);
840 * Report critical errors. ip may be NULL.
843 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip,
844 int error, const char *msg)
846 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR;
848 krateprintf(&hmp->krate,
849 "HAMMER(%s): Critical error inode=%jd error=%d %s\n",
850 hmp->mp->mnt_stat.f_mntfromname,
851 (intmax_t)(ip ? ip->obj_id : -1),
854 if (hmp->ronly == 0) {
855 hmp->ronly = 2; /* special errored read-only mode */
856 hmp->mp->mnt_flag |= MNT_RDONLY;
857 kprintf("HAMMER(%s): Forcing read-only mode\n",
858 hmp->mp->mnt_stat.f_mntfromname);
861 if (hammer_debug_critical)
862 Debugger("Entering debugger");
867 * Obtain a vnode for the specified inode number. An exclusively locked
871 hammer_vfs_vget(struct mount *mp, struct vnode *dvp,
872 ino_t ino, struct vnode **vpp)
874 struct hammer_transaction trans;
875 struct hammer_mount *hmp = (void *)mp->mnt_data;
876 struct hammer_inode *ip;
878 u_int32_t localization;
880 hammer_simple_transaction(&trans, hmp);
883 * If a directory vnode is supplied (mainly NFS) then we can acquire
884 * the PFS domain from it. Otherwise we would only be able to vget
885 * inodes in the root PFS.
888 localization = HAMMER_DEF_LOCALIZATION +
889 VTOI(dvp)->obj_localization;
891 localization = HAMMER_DEF_LOCALIZATION;
895 * Lookup the requested HAMMER inode. The structure must be
896 * left unlocked while we manipulate the related vnode to avoid
899 ip = hammer_get_inode(&trans, NULL, ino,
900 hmp->asof, localization,
904 hammer_done_transaction(&trans);
907 error = hammer_get_vnode(ip, vpp);
908 hammer_rel_inode(ip, 0);
909 hammer_done_transaction(&trans);
914 * Return the root vnode for the filesystem.
916 * HAMMER stores the root vnode in the hammer_mount structure so
917 * getting it is easy.
920 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
923 struct hammer_mount *hmp = (void *)mp->mnt_data;
927 error = hammer_vfs_vget(mp, NULL, 1, vpp);
932 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
934 struct hammer_mount *hmp = (void *)mp->mnt_data;
935 hammer_volume_t volume;
936 hammer_volume_ondisk_t ondisk;
941 volume = hammer_get_root_volume(hmp, &error);
944 ondisk = volume->ondisk;
949 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved);
950 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes;
951 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
952 hammer_rel_volume(volume, 0);
954 mp->mnt_stat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE;
955 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
956 if (mp->mnt_stat.f_files < 0)
957 mp->mnt_stat.f_files = 0;
964 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
966 struct hammer_mount *hmp = (void *)mp->mnt_data;
967 hammer_volume_t volume;
968 hammer_volume_ondisk_t ondisk;
973 volume = hammer_get_root_volume(hmp, &error);
976 ondisk = volume->ondisk;
981 _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved);
982 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes;
983 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
984 hammer_rel_volume(volume, 0);
986 mp->mnt_vstat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE;
987 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree;
988 if (mp->mnt_vstat.f_files < 0)
989 mp->mnt_vstat.f_files = 0;
990 *sbp = mp->mnt_vstat;
995 * Sync the filesystem. Currently we have to run it twice, the second
996 * one will advance the undo start index to the end index, so if a crash
997 * occurs no undos will be run on mount.
999 * We do not sync the filesystem if we are called from a panic. If we did
1000 * we might end up blowing up a sync that was already in progress.
1003 hammer_vfs_sync(struct mount *mp, int waitfor)
1005 struct hammer_mount *hmp = (void *)mp->mnt_data;
1008 if (panicstr == NULL) {
1009 error = hammer_sync_hmp(hmp, waitfor);
1017 * Convert a vnode to a file handle.
1020 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp)
1024 KKASSERT(MAXFIDSZ >= 16);
1026 fhp->fid_len = offsetof(struct fid, fid_data[16]);
1027 fhp->fid_ext = ip->obj_localization >> 16;
1028 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id));
1029 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof));
1035 * Convert a file handle back to a vnode.
1037 * Use rootvp to enforce PFS isolation when a PFS is exported via a
1041 hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
1042 struct fid *fhp, struct vnode **vpp)
1044 struct hammer_transaction trans;
1045 struct hammer_inode *ip;
1046 struct hammer_inode_info info;
1048 u_int32_t localization;
1050 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id));
1051 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof));
1053 localization = VTOI(rootvp)->obj_localization;
1055 localization = (u_int32_t)fhp->fid_ext << 16;
1057 hammer_simple_transaction(&trans, (void *)mp->mnt_data);
1060 * Get/allocate the hammer_inode structure. The structure must be
1061 * unlocked while we manipulate the related vnode to avoid a
1064 ip = hammer_get_inode(&trans, NULL, info.obj_id,
1065 info.obj_asof, localization, 0, &error);
1067 error = hammer_get_vnode(ip, vpp);
1068 hammer_rel_inode(ip, 0);
1072 hammer_done_transaction(&trans);
1077 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
1078 int *exflagsp, struct ucred **credanonp)
1080 hammer_mount_t hmp = (void *)mp->mnt_data;
1084 np = vfs_export_lookup(mp, &hmp->export, nam);
1086 *exflagsp = np->netc_exflags;
1087 *credanonp = &np->netc_anon;
1097 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export)
1099 hammer_mount_t hmp = (void *)mp->mnt_data;
1103 case MOUNTCTL_SET_EXPORT:
1104 error = vfs_export(mp, &hmp->export, export);