HAMMER: MFC to 2.0
[dragonfly.git] / sys / vfs / hammer / hammer_vfsops.c
blob406e4b0785ef1e876cef60b0922189785b2392a5
1 /*
2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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
16 * distribution.
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
32 * SUCH DAMAGE.
34 * $DragonFly: src/sys/vfs/hammer/hammer_vfsops.c,v 1.63.2.6 2008/08/02 21:24:28 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>
46 #include <sys/buf.h>
47 #include <sys/buf2.h>
48 #include "hammer.h"
50 int hammer_debug_io;
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;
56 int hammer_debug_tid;
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_limit_iqueued; /* per-mount */
97 int hammer_bio_count;
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, "");
130 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_iqueued, CTLFLAG_RW,
131 &hammer_limit_iqueued, 0, "");
133 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_fsyncs, CTLFLAG_RD,
134 &hammer_count_fsyncs, 0, "");
135 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD,
136 &hammer_count_inodes, 0, "");
137 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD,
138 &hammer_count_iqueued, 0, "");
139 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD,
140 &hammer_count_reclaiming, 0, "");
141 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD,
142 &hammer_count_records, 0, "");
143 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD,
144 &hammer_count_record_datas, 0, "");
145 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD,
146 &hammer_count_volumes, 0, "");
147 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD,
148 &hammer_count_buffers, 0, "");
149 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD,
150 &hammer_count_nodes, 0, "");
151 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, count_extra_space_used, CTLFLAG_RD,
152 &hammer_count_extra_space_used, 0, "");
154 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD,
155 &hammer_stats_btree_searches, 0, "");
156 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD,
157 &hammer_stats_btree_lookups, 0, "");
158 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD,
159 &hammer_stats_btree_inserts, 0, "");
160 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD,
161 &hammer_stats_btree_deletes, 0, "");
162 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD,
163 &hammer_stats_btree_elements, 0, "");
164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD,
165 &hammer_stats_btree_splits, 0, "");
166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD,
167 &hammer_stats_btree_iterations, 0, "");
168 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD,
169 &hammer_stats_record_iterations, 0, "");
171 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_read, CTLFLAG_RD,
172 &hammer_stats_file_read, 0, "");
173 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_write, CTLFLAG_RD,
174 &hammer_stats_file_write, 0, "");
175 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsr, CTLFLAG_RD,
176 &hammer_stats_file_iopsr, 0, "");
177 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsw, CTLFLAG_RD,
178 &hammer_stats_file_iopsw, 0, "");
179 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_read, CTLFLAG_RD,
180 &hammer_stats_disk_read, 0, "");
181 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_write, CTLFLAG_RD,
182 &hammer_stats_disk_write, 0, "");
183 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_inode_flushes, CTLFLAG_RD,
184 &hammer_stats_inode_flushes, 0, "");
185 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_commits, CTLFLAG_RD,
186 &hammer_stats_commits, 0, "");
188 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD,
189 &hammer_count_dirtybufspace, 0, "");
190 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD,
191 &hammer_count_refedbufs, 0, "");
192 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD,
193 &hammer_count_reservations, 0, "");
194 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD,
195 &hammer_count_io_running_read, 0, "");
196 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD,
197 &hammer_count_io_locked, 0, "");
198 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD,
199 &hammer_count_io_running_write, 0, "");
200 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW,
201 &hammer_zone_limit, 0, "");
202 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW,
203 &hammer_contention_count, 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);
214 * VFS ABI
216 static void hammer_free_hmp(struct mount *mp);
218 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data,
219 struct ucred *cred);
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,
223 struct ucred *cred);
224 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
225 struct ucred *cred);
226 static int hammer_vfs_sync(struct mount *mp, int waitfor);
227 static int hammer_vfs_vget(struct mount *mp, ino_t ino,
228 struct vnode **vpp);
229 static int hammer_vfs_init(struct vfsconf *conf);
230 static int hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp,
231 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-general", "hammer general");
252 MALLOC_DEFINE(M_HAMMER_INO, "hammer-inodes", "hammer inodes");
254 VFS_SET(hammer_vfsops, hammer, 0);
255 MODULE_VERSION(hammer, 1);
257 static int
258 hammer_vfs_init(struct vfsconf *conf)
260 int n;
262 if (hammer_limit_recs == 0) {
263 hammer_limit_recs = nbuf * 25;
264 n = kmalloc_limit(M_HAMMER) / 512;
265 if (hammer_limit_recs > n)
266 hammer_limit_recs = n;
268 if (hammer_limit_dirtybufspace == 0) {
269 hammer_limit_dirtybufspace = hidirtybufspace / 2;
270 if (hammer_limit_dirtybufspace < 100)
271 hammer_limit_dirtybufspace = 100;
273 if (hammer_limit_iqueued == 0)
274 hammer_limit_iqueued = desiredvnodes / 5;
275 return(0);
278 static int
279 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data,
280 struct ucred *cred)
282 struct hammer_mount_info info;
283 hammer_mount_t hmp;
284 hammer_volume_t rootvol;
285 struct vnode *rootvp;
286 struct vnode *devvp = NULL;
287 const char *upath; /* volume name in userspace */
288 char *path; /* volume name in system space */
289 int error;
290 int i;
291 int master_id;
292 if (mntpt == NULL) {
294 * Root mount
296 if ((error = bdevvp(rootdev, &devvp))) {
297 kprintf("hammer_mountroot: can't find devvp\n");
298 return (error);
300 mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */
301 bzero(&info, sizeof(info));
302 info.asof = 0;
303 info.hflags = 0;
304 info.nvolumes = 1;
305 } else {
306 if ((error = copyin(data, &info, sizeof(info))) != 0)
307 return (error);
311 * updating or new mount
313 if (mp->mnt_flag & MNT_UPDATE) {
314 hmp = (void *)mp->mnt_data;
315 KKASSERT(hmp != NULL);
316 } else {
317 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
318 return (EINVAL);
319 hmp = NULL;
323 * master-id validation. The master id may not be changed by a
324 * mount update.
326 if (info.hflags & HMNT_MASTERID) {
327 if (hmp && hmp->master_id != info.master_id) {
328 kprintf("hammer: cannot change master id "
329 "with mount update\n");
330 return(EINVAL);
332 master_id = info.master_id;
333 if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS)
334 return (EINVAL);
335 } else {
336 if (hmp)
337 master_id = hmp->master_id;
338 else
339 master_id = 0;
343 * Interal mount data structure
345 if (hmp == NULL) {
346 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
347 mp->mnt_data = (qaddr_t)hmp;
348 hmp->mp = mp;
349 hmp->namekey_iterator = mycpu->gd_time_seconds;
350 /*TAILQ_INIT(&hmp->recycle_list);*/
352 hmp->root_btree_beg.localization = 0x00000000U;
353 hmp->root_btree_beg.obj_id = -0x8000000000000000LL;
354 hmp->root_btree_beg.key = -0x8000000000000000LL;
355 hmp->root_btree_beg.create_tid = 1;
356 hmp->root_btree_beg.delete_tid = 1;
357 hmp->root_btree_beg.rec_type = 0;
358 hmp->root_btree_beg.obj_type = 0;
360 hmp->root_btree_end.localization = 0xFFFFFFFFU;
361 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL;
362 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL;
363 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL;
364 hmp->root_btree_end.delete_tid = 0; /* special case */
365 hmp->root_btree_end.rec_type = 0xFFFFU;
366 hmp->root_btree_end.obj_type = 0;
368 hmp->krate.freq = 1; /* maximum reporting rate (hz) */
369 hmp->krate.count = -16; /* initial burst */
371 hmp->sync_lock.refs = 1;
372 hmp->free_lock.refs = 1;
373 hmp->undo_lock.refs = 1;
374 hmp->blkmap_lock.refs = 1;
376 TAILQ_INIT(&hmp->delay_list);
377 TAILQ_INIT(&hmp->flush_group_list);
378 TAILQ_INIT(&hmp->objid_cache_list);
379 TAILQ_INIT(&hmp->undo_lru_list);
380 TAILQ_INIT(&hmp->reclaim_list);
382 hmp->hflags &= ~HMNT_USERFLAGS;
383 hmp->hflags |= info.hflags & HMNT_USERFLAGS;
385 hmp->master_id = master_id;
387 if (info.asof) {
388 mp->mnt_flag |= MNT_RDONLY;
389 hmp->asof = info.asof;
390 } else {
391 hmp->asof = HAMMER_MAX_TID;
395 * Re-open read-write if originally read-only, or vise-versa.
397 if (mp->mnt_flag & MNT_UPDATE) {
398 error = 0;
399 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
400 kprintf("HAMMER read-only -> read-write\n");
401 hmp->ronly = 0;
402 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
403 hammer_adjust_volume_mode, NULL);
404 rootvol = hammer_get_root_volume(hmp, &error);
405 if (rootvol) {
406 hammer_recover_flush_buffers(hmp, rootvol, 1);
407 bcopy(rootvol->ondisk->vol0_blockmap,
408 hmp->blockmap,
409 sizeof(hmp->blockmap));
410 hammer_rel_volume(rootvol, 0);
412 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
413 hammer_reload_inode, NULL);
414 /* kernel clears MNT_RDONLY */
415 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
416 kprintf("HAMMER read-write -> read-only\n");
417 hmp->ronly = 1; /* messy */
418 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
419 hammer_reload_inode, NULL);
420 hmp->ronly = 0;
421 hammer_flusher_sync(hmp);
422 hammer_flusher_sync(hmp);
423 hammer_flusher_sync(hmp);
424 hmp->ronly = 1;
425 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
426 hammer_adjust_volume_mode, NULL);
428 return(error);
431 RB_INIT(&hmp->rb_vols_root);
432 RB_INIT(&hmp->rb_inos_root);
433 RB_INIT(&hmp->rb_nods_root);
434 RB_INIT(&hmp->rb_undo_root);
435 RB_INIT(&hmp->rb_resv_root);
436 RB_INIT(&hmp->rb_bufs_root);
437 RB_INIT(&hmp->rb_pfsm_root);
439 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
441 TAILQ_INIT(&hmp->volu_list);
442 TAILQ_INIT(&hmp->undo_list);
443 TAILQ_INIT(&hmp->data_list);
444 TAILQ_INIT(&hmp->meta_list);
445 TAILQ_INIT(&hmp->lose_list);
448 * Load volumes
450 path = objcache_get(namei_oc, M_WAITOK);
451 hmp->nvolumes = -1;
452 for (i = 0; i < info.nvolumes; ++i) {
453 if (mntpt == NULL) {
455 * Root mount.
456 * Only one volume; and no need for copyin.
458 KKASSERT(info.nvolumes == 1);
459 ksnprintf(path, MAXPATHLEN, "/dev/%s",
460 mp->mnt_stat.f_mntfromname);
461 error = 0;
462 } else {
463 error = copyin(&info.volumes[i], &upath,
464 sizeof(char *));
465 if (error == 0)
466 error = copyinstr(upath, path,
467 MAXPATHLEN, NULL);
469 if (error == 0)
470 error = hammer_install_volume(hmp, path, devvp);
471 if (error)
472 break;
474 objcache_put(namei_oc, path);
477 * Make sure we found a root volume
479 if (error == 0 && hmp->rootvol == NULL) {
480 kprintf("hammer_mount: No root volume found!\n");
481 error = EINVAL;
485 * Check that all required volumes are available
487 if (error == 0 && hammer_mountcheck_volumes(hmp)) {
488 kprintf("hammer_mount: Missing volumes, cannot mount!\n");
489 error = EINVAL;
492 if (error) {
493 hammer_free_hmp(mp);
494 return (error);
498 * No errors, setup enough of the mount point so we can lookup the
499 * root vnode.
501 mp->mnt_iosize_max = MAXPHYS;
502 mp->mnt_kern_flag |= MNTK_FSMID;
505 * note: f_iosize is used by vnode_pager_haspage() when constructing
506 * its VOP_BMAP call.
508 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
509 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE;
511 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE;
512 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE;
514 mp->mnt_maxsymlinklen = 255;
515 mp->mnt_flag |= MNT_LOCAL;
517 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
518 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops);
519 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops);
522 * The root volume's ondisk pointer is only valid if we hold a
523 * reference to it.
525 rootvol = hammer_get_root_volume(hmp, &error);
526 if (error)
527 goto failed;
530 * Perform any necessary UNDO operations. The recovery code does
531 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
532 * and then re-copy it again after recovery is complete.
534 * If this is a read-only mount the UNDO information is retained
535 * in memory in the form of dirty buffer cache buffers, and not
536 * written back to the media.
538 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
539 sizeof(hmp->blockmap));
542 * The undo_rec_limit limits the size of flush groups to avoid
543 * blowing out the UNDO FIFO. This calculation is typically in
544 * the tens of thousands and is designed primarily when small
545 * HAMMER filesystems are created.
547 hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100;
548 if (hammer_debug_general & 0x0001)
549 kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit);
551 error = hammer_recover(hmp, rootvol);
552 if (error) {
553 kprintf("Failed to recover HAMMER filesystem on mount\n");
554 goto done;
558 * Finish setup now that we have a good root volume.
560 * The top 16 bits of fsid.val[1] is a pfs id.
562 ksnprintf(mp->mnt_stat.f_mntfromname,
563 sizeof(mp->mnt_stat.f_mntfromname), "%s",
564 rootvol->ondisk->vol_name);
565 mp->mnt_stat.f_fsid.val[0] =
566 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8);
567 mp->mnt_stat.f_fsid.val[1] =
568 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8);
569 mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF;
571 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid;
572 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid,
573 sizeof(mp->mnt_vstat.f_fsid_uuid));
576 * Certain often-modified fields in the root volume are cached in
577 * the hammer_mount structure so we do not have to generate lots
578 * of little UNDO structures for them.
580 * Recopy after recovery. This also has the side effect of
581 * setting our cached undo FIFO's first_offset, which serves to
582 * placemark the FIFO start for the NEXT flush cycle while the
583 * on-disk first_offset represents the LAST flush cycle.
585 hmp->next_tid = rootvol->ondisk->vol0_next_tid;
586 hmp->flush_tid1 = hmp->next_tid;
587 hmp->flush_tid2 = hmp->next_tid;
588 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
589 sizeof(hmp->blockmap));
590 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks;
592 hammer_flusher_create(hmp);
595 * Locate the root directory using the root cluster's B-Tree as a
596 * starting point. The root directory uses an obj_id of 1.
598 * FUTURE: Leave the root directory cached referenced but unlocked
599 * in hmp->rootvp (need to flush it on unmount).
601 error = hammer_vfs_vget(mp, 1, &rootvp);
602 if (error)
603 goto done;
604 vput(rootvp);
605 /*vn_unlock(hmp->rootvp);*/
607 done:
608 hammer_rel_volume(rootvol, 0);
609 failed:
611 * Cleanup and return.
613 if (error)
614 hammer_free_hmp(mp);
615 return (error);
618 static int
619 hammer_vfs_unmount(struct mount *mp, int mntflags)
621 #if 0
622 struct hammer_mount *hmp = (void *)mp->mnt_data;
623 #endif
624 int flags;
625 int error;
628 * Clean out the vnodes
630 flags = 0;
631 if (mntflags & MNT_FORCE)
632 flags |= FORCECLOSE;
633 if ((error = vflush(mp, 0, flags)) != 0)
634 return (error);
637 * Clean up the internal mount structure and related entities. This
638 * may issue I/O.
640 hammer_free_hmp(mp);
641 return(0);
645 * Clean up the internal mount structure and disassociate it from the mount.
646 * This may issue I/O.
648 static void
649 hammer_free_hmp(struct mount *mp)
651 struct hammer_mount *hmp = (void *)mp->mnt_data;
652 hammer_flush_group_t flg;
653 int count;
656 * Flush anything dirty. This won't even run if the
657 * filesystem errored-out.
659 count = 0;
660 while (hammer_flusher_haswork(hmp)) {
661 hammer_flusher_sync(hmp);
662 ++count;
663 if (count >= 5) {
664 if (count == 5)
665 kprintf("HAMMER: umount flushing.");
666 else
667 kprintf(".");
668 tsleep(hmp, 0, "hmrufl", hz);
670 if (count == 30) {
671 kprintf("giving up\n");
672 break;
675 if (count >= 5 && count < 30)
676 kprintf("\n");
679 * If the mount had a critical error we have to destroy any
680 * remaining inodes before we can finish cleaning up the flusher.
682 if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) {
683 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
684 hammer_destroy_inode_callback, NULL);
688 * There shouldn't be any inodes left now and any left over
689 * flush groups should now be empty.
691 KKASSERT(RB_EMPTY(&hmp->rb_inos_root));
692 while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) {
693 TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry);
694 KKASSERT(TAILQ_EMPTY(&flg->flush_list));
695 if (flg->refs) {
696 kprintf("HAMMER: Warning, flush_group %p was "
697 "not empty on umount!\n", flg);
699 kfree(flg, M_HAMMER);
703 * We can finally destroy the flusher
705 hammer_flusher_destroy(hmp);
708 * We may have held recovered buffers due to a read-only mount.
709 * These must be discarded.
711 if (hmp->ronly)
712 hammer_recover_flush_buffers(hmp, NULL, -1);
715 * Unload buffers and then volumes
717 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
718 hammer_unload_buffer, NULL);
719 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
720 hammer_unload_volume, NULL);
722 mp->mnt_data = NULL;
723 mp->mnt_flag &= ~MNT_LOCAL;
724 hmp->mp = NULL;
725 hammer_destroy_objid_cache(hmp);
726 kfree(hmp, M_HAMMER);
730 * Report critical errors. ip may be NULL.
732 void
733 hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip,
734 int error, const char *msg)
736 hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR;
737 krateprintf(&hmp->krate,
738 "HAMMER(%s): Critical error inode=%lld %s\n",
739 hmp->mp->mnt_stat.f_mntfromname,
740 (ip ? ip->obj_id : -1), msg);
741 if (hmp->ronly == 0) {
742 hmp->ronly = 2; /* special errored read-only mode */
743 hmp->mp->mnt_flag |= MNT_RDONLY;
744 kprintf("HAMMER(%s): Forcing read-only mode\n",
745 hmp->mp->mnt_stat.f_mntfromname);
747 hmp->error = error;
752 * Obtain a vnode for the specified inode number. An exclusively locked
753 * vnode is returned.
756 hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
758 struct hammer_transaction trans;
759 struct hammer_mount *hmp = (void *)mp->mnt_data;
760 struct hammer_inode *ip;
761 int error;
763 hammer_simple_transaction(&trans, hmp);
766 * Lookup the requested HAMMER inode. The structure must be
767 * left unlocked while we manipulate the related vnode to avoid
768 * a deadlock.
770 ip = hammer_get_inode(&trans, NULL, ino,
771 hmp->asof, HAMMER_DEF_LOCALIZATION,
772 0, &error);
773 if (ip == NULL) {
774 *vpp = NULL;
775 hammer_done_transaction(&trans);
776 return(error);
778 error = hammer_get_vnode(ip, vpp);
779 hammer_rel_inode(ip, 0);
780 hammer_done_transaction(&trans);
781 return (error);
785 * Return the root vnode for the filesystem.
787 * HAMMER stores the root vnode in the hammer_mount structure so
788 * getting it is easy.
790 static int
791 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
793 #if 0
794 struct hammer_mount *hmp = (void *)mp->mnt_data;
795 #endif
796 int error;
798 error = hammer_vfs_vget(mp, 1, vpp);
799 return (error);
802 static int
803 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
805 struct hammer_mount *hmp = (void *)mp->mnt_data;
806 hammer_volume_t volume;
807 hammer_volume_ondisk_t ondisk;
808 int error;
809 int64_t bfree;
811 volume = hammer_get_root_volume(hmp, &error);
812 if (error)
813 return(error);
814 ondisk = volume->ondisk;
817 * Basic stats
819 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes;
820 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
821 hammer_rel_volume(volume, 0);
823 mp->mnt_stat.f_bfree = bfree / HAMMER_BUFSIZE;
824 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
825 if (mp->mnt_stat.f_files < 0)
826 mp->mnt_stat.f_files = 0;
828 *sbp = mp->mnt_stat;
829 return(0);
832 static int
833 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
835 struct hammer_mount *hmp = (void *)mp->mnt_data;
836 hammer_volume_t volume;
837 hammer_volume_ondisk_t ondisk;
838 int error;
839 int64_t bfree;
841 volume = hammer_get_root_volume(hmp, &error);
842 if (error)
843 return(error);
844 ondisk = volume->ondisk;
847 * Basic stats
849 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes;
850 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
851 hammer_rel_volume(volume, 0);
853 mp->mnt_vstat.f_bfree = bfree / HAMMER_BUFSIZE;
854 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree;
855 if (mp->mnt_vstat.f_files < 0)
856 mp->mnt_vstat.f_files = 0;
857 *sbp = mp->mnt_vstat;
858 return(0);
862 * Sync the filesystem. Currently we have to run it twice, the second
863 * one will advance the undo start index to the end index, so if a crash
864 * occurs no undos will be run on mount.
866 * We do not sync the filesystem if we are called from a panic. If we did
867 * we might end up blowing up a sync that was already in progress.
869 static int
870 hammer_vfs_sync(struct mount *mp, int waitfor)
872 struct hammer_mount *hmp = (void *)mp->mnt_data;
873 int error;
875 if (panicstr == NULL) {
876 error = hammer_sync_hmp(hmp, waitfor);
877 } else {
878 error = EIO;
880 return (error);
884 * Convert a vnode to a file handle.
886 static int
887 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp)
889 hammer_inode_t ip;
891 KKASSERT(MAXFIDSZ >= 16);
892 ip = VTOI(vp);
893 fhp->fid_len = offsetof(struct fid, fid_data[16]);
894 fhp->fid_ext = ip->obj_localization >> 16;
895 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id));
896 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof));
897 return(0);
902 * Convert a file handle back to a vnode.
904 static int
905 hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
907 struct hammer_transaction trans;
908 struct hammer_inode *ip;
909 struct hammer_inode_info info;
910 int error;
911 u_int32_t localization;
913 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id));
914 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof));
915 localization = (u_int32_t)fhp->fid_ext << 16;
917 hammer_simple_transaction(&trans, (void *)mp->mnt_data);
920 * Get/allocate the hammer_inode structure. The structure must be
921 * unlocked while we manipulate the related vnode to avoid a
922 * deadlock.
924 ip = hammer_get_inode(&trans, NULL, info.obj_id,
925 info.obj_asof, localization, 0, &error);
926 if (ip == NULL) {
927 *vpp = NULL;
928 return(error);
930 error = hammer_get_vnode(ip, vpp);
931 hammer_rel_inode(ip, 0);
932 hammer_done_transaction(&trans);
933 return (error);
936 static int
937 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
938 int *exflagsp, struct ucred **credanonp)
940 hammer_mount_t hmp = (void *)mp->mnt_data;
941 struct netcred *np;
942 int error;
944 np = vfs_export_lookup(mp, &hmp->export, nam);
945 if (np) {
946 *exflagsp = np->netc_exflags;
947 *credanonp = &np->netc_anon;
948 error = 0;
949 } else {
950 error = EACCES;
952 return (error);
957 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export)
959 hammer_mount_t hmp = (void *)mp->mnt_data;
960 int error;
962 switch(op) {
963 case MOUNTCTL_SET_EXPORT:
964 error = vfs_export(mp, &hmp->export, export);
965 break;
966 default:
967 error = EOPNOTSUPP;
968 break;
970 return(error);