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 1.57 2008/06/30 04:18:30 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;
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_debug_cluster_enable = 1; /* enable read clustering by default */
60 int hammer_count_inodes;
61 int hammer_count_iqueued;
62 int hammer_count_reclaiming;
63 int hammer_count_records;
64 int hammer_count_record_datas;
65 int hammer_count_volumes;
66 int hammer_count_buffers;
67 int hammer_count_nodes;
68 int64_t hammer_stats_btree_lookups;
69 int64_t hammer_stats_btree_searches;
70 int64_t hammer_stats_btree_inserts;
71 int64_t hammer_stats_btree_deletes;
72 int64_t hammer_stats_btree_elements;
73 int64_t hammer_stats_btree_splits;
74 int64_t hammer_stats_btree_iterations;
75 int64_t hammer_stats_record_iterations;
76 int hammer_count_dirtybufspace; /* global */
77 int hammer_count_refedbufs; /* global */
78 int hammer_count_reservations;
79 int hammer_count_io_running_read;
80 int hammer_count_io_running_write;
81 int hammer_count_io_locked;
82 int hammer_limit_dirtybufspace; /* per-mount */
83 int hammer_limit_recs; /* as a whole XXX */
84 int hammer_limit_iqueued; /* per-mount */
86 int hammer_verify_zone;
87 int hammer_write_mode;
88 int64_t hammer_contention_count;
89 int64_t hammer_zone_limit;
91 SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem");
92 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW,
93 &hammer_debug_general, 0, "");
94 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW,
95 &hammer_debug_io, 0, "");
96 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW,
97 &hammer_debug_debug, 0, "");
98 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW,
99 &hammer_debug_inode, 0, "");
100 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW,
101 &hammer_debug_locks, 0, "");
102 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW,
103 &hammer_debug_btree, 0, "");
104 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW,
105 &hammer_debug_tid, 0, "");
106 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW,
107 &hammer_debug_recover, 0, "");
108 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW,
109 &hammer_debug_recover_faults, 0, "");
110 SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_cluster_enable, CTLFLAG_RW,
111 &hammer_debug_cluster_enable, 0, "");
113 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_dirtybufspace, CTLFLAG_RW,
114 &hammer_limit_dirtybufspace, 0, "");
115 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW,
116 &hammer_limit_recs, 0, "");
117 SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_iqueued, CTLFLAG_RW,
118 &hammer_limit_iqueued, 0, "");
120 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD,
121 &hammer_count_inodes, 0, "");
122 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD,
123 &hammer_count_iqueued, 0, "");
124 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaiming, CTLFLAG_RD,
125 &hammer_count_reclaiming, 0, "");
126 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD,
127 &hammer_count_records, 0, "");
128 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD,
129 &hammer_count_record_datas, 0, "");
130 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD,
131 &hammer_count_volumes, 0, "");
132 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD,
133 &hammer_count_buffers, 0, "");
134 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD,
135 &hammer_count_nodes, 0, "");
136 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD,
137 &hammer_stats_btree_searches, 0, "");
138 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD,
139 &hammer_stats_btree_lookups, 0, "");
140 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD,
141 &hammer_stats_btree_inserts, 0, "");
142 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD,
143 &hammer_stats_btree_deletes, 0, "");
144 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD,
145 &hammer_stats_btree_elements, 0, "");
146 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD,
147 &hammer_stats_btree_splits, 0, "");
148 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD,
149 &hammer_stats_btree_iterations, 0, "");
150 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD,
151 &hammer_stats_record_iterations, 0, "");
152 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD,
153 &hammer_count_dirtybufspace, 0, "");
154 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD,
155 &hammer_count_refedbufs, 0, "");
156 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD,
157 &hammer_count_reservations, 0, "");
158 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD,
159 &hammer_count_io_running_read, 0, "");
160 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD,
161 &hammer_count_io_locked, 0, "");
162 SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD,
163 &hammer_count_io_running_write, 0, "");
164 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW,
165 &hammer_zone_limit, 0, "");
166 SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW,
167 &hammer_contention_count, 0, "");
168 SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW,
169 &hammer_verify_zone, 0, "");
170 SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW,
171 &hammer_write_mode, 0, "");
173 KTR_INFO_MASTER(hammer);
178 static void hammer_free_hmp(struct mount *mp);
180 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data,
182 static int hammer_vfs_unmount(struct mount *mp, int mntflags);
183 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp);
184 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp,
186 static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
188 static int hammer_vfs_sync(struct mount *mp, int waitfor);
189 static int hammer_vfs_vget(struct mount *mp, ino_t ino,
191 static int hammer_vfs_init(struct vfsconf *conf);
192 static int hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp,
194 static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp);
195 static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
196 int *exflagsp, struct ucred **credanonp);
199 static struct vfsops hammer_vfsops = {
200 .vfs_mount = hammer_vfs_mount,
201 .vfs_unmount = hammer_vfs_unmount,
202 .vfs_root = hammer_vfs_root,
203 .vfs_statfs = hammer_vfs_statfs,
204 .vfs_statvfs = hammer_vfs_statvfs,
205 .vfs_sync = hammer_vfs_sync,
206 .vfs_vget = hammer_vfs_vget,
207 .vfs_init = hammer_vfs_init,
208 .vfs_vptofh = hammer_vfs_vptofh,
209 .vfs_fhtovp = hammer_vfs_fhtovp,
210 .vfs_checkexp = hammer_vfs_checkexp
213 MALLOC_DEFINE(M_HAMMER, "hammer-mount", "hammer mount");
215 VFS_SET(hammer_vfsops, hammer, 0);
216 MODULE_VERSION(hammer, 1);
219 hammer_vfs_init(struct vfsconf *conf)
223 if (hammer_limit_recs == 0) {
224 hammer_limit_recs = nbuf * 25;
225 n = kmalloc_limit(M_HAMMER) / 512;
226 if (hammer_limit_recs > n)
227 hammer_limit_recs = n;
229 if (hammer_limit_dirtybufspace == 0) {
230 hammer_limit_dirtybufspace = hidirtybufspace / 2;
231 if (hammer_limit_dirtybufspace < 100)
232 hammer_limit_dirtybufspace = 100;
234 if (hammer_limit_iqueued == 0)
235 hammer_limit_iqueued = desiredvnodes / 5;
240 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data,
243 struct hammer_mount_info info;
245 hammer_volume_t rootvol;
246 struct vnode *rootvp;
247 const char *upath; /* volume name in userspace */
248 char *path; /* volume name in system space */
252 if ((error = copyin(data, &info, sizeof(info))) != 0)
254 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
255 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
258 if ((info.hflags & HMNT_MASTERID) &&
259 (info.masterid < -1 || info.masterid >= HAMMER_MAX_MASTERS)) {
264 * Interal mount data structure
266 if (mp->mnt_flag & MNT_UPDATE) {
267 hmp = (void *)mp->mnt_data;
268 KKASSERT(hmp != NULL);
270 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
271 mp->mnt_data = (qaddr_t)hmp;
273 hmp->namekey_iterator = mycpu->gd_time_seconds;
274 /*TAILQ_INIT(&hmp->recycle_list);*/
276 hmp->root_btree_beg.localization = 0x00000000U;
277 hmp->root_btree_beg.obj_id = -0x8000000000000000LL;
278 hmp->root_btree_beg.key = -0x8000000000000000LL;
279 hmp->root_btree_beg.create_tid = 1;
280 hmp->root_btree_beg.delete_tid = 1;
281 hmp->root_btree_beg.rec_type = 0;
282 hmp->root_btree_beg.obj_type = 0;
284 hmp->root_btree_end.localization = 0xFFFFFFFFU;
285 hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL;
286 hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL;
287 hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL;
288 hmp->root_btree_end.delete_tid = 0; /* special case */
289 hmp->root_btree_end.rec_type = 0xFFFFU;
290 hmp->root_btree_end.obj_type = 0;
292 hmp->sync_lock.refs = 1;
293 hmp->free_lock.refs = 1;
294 hmp->undo_lock.refs = 1;
295 hmp->blkmap_lock.refs = 1;
297 TAILQ_INIT(&hmp->flush_list);
298 TAILQ_INIT(&hmp->delay_list);
299 TAILQ_INIT(&hmp->objid_cache_list);
300 TAILQ_INIT(&hmp->undo_lru_list);
301 TAILQ_INIT(&hmp->reclaim_list);
303 hmp->hflags &= ~HMNT_USERFLAGS;
304 hmp->hflags |= info.hflags & HMNT_USERFLAGS;
305 if (info.hflags & HMNT_MASTERID)
306 hmp->masterid = info.masterid;
311 mp->mnt_flag |= MNT_RDONLY;
312 hmp->asof = info.asof;
314 hmp->asof = HAMMER_MAX_TID;
318 * Re-open read-write if originally read-only, or vise-versa.
320 if (mp->mnt_flag & MNT_UPDATE) {
322 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
323 kprintf("HAMMER read-only -> read-write\n");
325 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
326 hammer_adjust_volume_mode, NULL);
327 rootvol = hammer_get_root_volume(hmp, &error);
329 hammer_recover_flush_buffers(hmp, rootvol, 1);
330 bcopy(rootvol->ondisk->vol0_blockmap,
332 sizeof(hmp->blockmap));
333 hammer_rel_volume(rootvol, 0);
335 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
336 hammer_reload_inode, NULL);
337 /* kernel clears MNT_RDONLY */
338 } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
339 kprintf("HAMMER read-write -> read-only\n");
340 hmp->ronly = 1; /* messy */
341 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
342 hammer_reload_inode, NULL);
344 hammer_flusher_sync(hmp);
345 hammer_flusher_sync(hmp);
346 hammer_flusher_sync(hmp);
348 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
349 hammer_adjust_volume_mode, NULL);
354 RB_INIT(&hmp->rb_vols_root);
355 RB_INIT(&hmp->rb_inos_root);
356 RB_INIT(&hmp->rb_nods_root);
357 RB_INIT(&hmp->rb_undo_root);
358 RB_INIT(&hmp->rb_resv_root);
359 RB_INIT(&hmp->rb_bufs_root);
361 hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
363 TAILQ_INIT(&hmp->volu_list);
364 TAILQ_INIT(&hmp->undo_list);
365 TAILQ_INIT(&hmp->data_list);
366 TAILQ_INIT(&hmp->meta_list);
367 TAILQ_INIT(&hmp->lose_list);
372 path = objcache_get(namei_oc, M_WAITOK);
373 hmp->nvolumes = info.nvolumes;
374 for (i = 0; i < info.nvolumes; ++i) {
375 error = copyin(&info.volumes[i], &upath, sizeof(char *));
377 error = copyinstr(upath, path, MAXPATHLEN, NULL);
379 error = hammer_install_volume(hmp, path);
383 objcache_put(namei_oc, path);
386 * Make sure we found a root volume
388 if (error == 0 && hmp->rootvol == NULL) {
389 kprintf("hammer_mount: No root volume found!\n");
398 * No errors, setup enough of the mount point so we can lookup the
401 mp->mnt_iosize_max = MAXPHYS;
402 mp->mnt_kern_flag |= MNTK_FSMID;
405 * note: f_iosize is used by vnode_pager_haspage() when constructing
408 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
409 mp->mnt_stat.f_bsize = HAMMER_BUFSIZE;
411 mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE;
412 mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE;
414 mp->mnt_maxsymlinklen = 255;
415 mp->mnt_flag |= MNT_LOCAL;
417 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
418 vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops);
419 vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops);
422 * The root volume's ondisk pointer is only valid if we hold a
425 rootvol = hammer_get_root_volume(hmp, &error);
430 * Perform any necessary UNDO operations. The recovery code does
431 * call hammer_undo_lookup() so we have to pre-cache the blockmap,
432 * and then re-copy it again after recovery is complete.
434 * If this is a read-only mount the UNDO information is retained
435 * in memory in the form of dirty buffer cache buffers, and not
436 * written back to the media.
438 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
439 sizeof(hmp->blockmap));
441 error = hammer_recover(hmp, rootvol);
443 kprintf("Failed to recover HAMMER filesystem on mount\n");
448 * Finish setup now that we have a good root volume
450 ksnprintf(mp->mnt_stat.f_mntfromname,
451 sizeof(mp->mnt_stat.f_mntfromname), "%s",
452 rootvol->ondisk->vol_name);
453 mp->mnt_stat.f_fsid.val[0] =
454 crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8);
455 mp->mnt_stat.f_fsid.val[1] =
456 crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8);
458 mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid;
459 mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid,
460 sizeof(mp->mnt_vstat.f_fsid_uuid));
463 * Certain often-modified fields in the root volume are cached in
464 * the hammer_mount structure so we do not have to generate lots
465 * of little UNDO structures for them.
467 * Recopy after recovery. This also has the side effect of
468 * setting our cached undo FIFO's first_offset, which serves to
469 * placemark the FIFO start for the NEXT flush cycle while the
470 * on-disk first_offset represents the LAST flush cycle.
472 hmp->next_tid = rootvol->ondisk->vol0_next_tid;
473 bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap,
474 sizeof(hmp->blockmap));
475 hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks;
477 hammer_flusher_create(hmp);
480 * Locate the root directory using the root cluster's B-Tree as a
481 * starting point. The root directory uses an obj_id of 1.
483 * FUTURE: Leave the root directory cached referenced but unlocked
484 * in hmp->rootvp (need to flush it on unmount).
486 error = hammer_vfs_vget(mp, 1, &rootvp);
490 /*vn_unlock(hmp->rootvp);*/
493 hammer_rel_volume(rootvol, 0);
496 * Cleanup and return.
504 hammer_vfs_unmount(struct mount *mp, int mntflags)
507 struct hammer_mount *hmp = (void *)mp->mnt_data;
513 * Clean out the vnodes
516 if (mntflags & MNT_FORCE)
518 if ((error = vflush(mp, 0, flags)) != 0)
522 * Clean up the internal mount structure and related entities. This
530 * Clean up the internal mount structure and disassociate it from the mount.
531 * This may issue I/O.
534 hammer_free_hmp(struct mount *mp)
536 struct hammer_mount *hmp = (void *)mp->mnt_data;
540 * Clean up the root vnode
547 hammer_flusher_sync(hmp);
548 hammer_flusher_sync(hmp);
549 hammer_flusher_destroy(hmp);
551 KKASSERT(RB_EMPTY(&hmp->rb_inos_root));
555 * Unload & flush inodes
557 * XXX illegal to call this from here, it can only be done from
560 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
561 hammer_unload_inode, (void *)MNT_WAIT);
564 * Unload & flush volumes
568 * Unload buffers and then volumes
570 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
571 hammer_unload_buffer, NULL);
572 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
573 hammer_unload_volume, NULL);
576 mp->mnt_flag &= ~MNT_LOCAL;
578 hammer_destroy_objid_cache(hmp);
579 kfree(hmp, M_HAMMER);
583 * Obtain a vnode for the specified inode number. An exclusively locked
587 hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
589 struct hammer_transaction trans;
590 struct hammer_mount *hmp = (void *)mp->mnt_data;
591 struct hammer_inode *ip;
594 hammer_simple_transaction(&trans, hmp);
597 * Lookup the requested HAMMER inode. The structure must be
598 * left unlocked while we manipulate the related vnode to avoid
601 ip = hammer_get_inode(&trans, NULL, ino,
602 hmp->asof, HAMMER_DEF_LOCALIZATION,
608 error = hammer_get_vnode(ip, vpp);
609 hammer_rel_inode(ip, 0);
610 hammer_done_transaction(&trans);
615 * Return the root vnode for the filesystem.
617 * HAMMER stores the root vnode in the hammer_mount structure so
618 * getting it is easy.
621 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
624 struct hammer_mount *hmp = (void *)mp->mnt_data;
628 error = hammer_vfs_vget(mp, 1, vpp);
633 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
635 struct hammer_mount *hmp = (void *)mp->mnt_data;
636 hammer_volume_t volume;
637 hammer_volume_ondisk_t ondisk;
641 volume = hammer_get_root_volume(hmp, &error);
644 ondisk = volume->ondisk;
649 mp->mnt_stat.f_files = ondisk->vol0_stat_inodes;
650 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
651 hammer_rel_volume(volume, 0);
653 mp->mnt_stat.f_bfree = bfree / HAMMER_BUFSIZE;
654 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
655 if (mp->mnt_stat.f_files < 0)
656 mp->mnt_stat.f_files = 0;
663 hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
665 struct hammer_mount *hmp = (void *)mp->mnt_data;
666 hammer_volume_t volume;
667 hammer_volume_ondisk_t ondisk;
671 volume = hammer_get_root_volume(hmp, &error);
674 ondisk = volume->ondisk;
679 mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes;
680 bfree = ondisk->vol0_stat_freebigblocks * HAMMER_LARGEBLOCK_SIZE;
681 hammer_rel_volume(volume, 0);
683 mp->mnt_vstat.f_bfree = bfree / HAMMER_BUFSIZE;
684 mp->mnt_vstat.f_bavail = mp->mnt_stat.f_bfree;
685 if (mp->mnt_vstat.f_files < 0)
686 mp->mnt_vstat.f_files = 0;
687 *sbp = mp->mnt_vstat;
692 * Sync the filesystem. Currently we have to run it twice, the second
693 * one will advance the undo start index to the end index, so if a crash
694 * occurs no undos will be run on mount.
696 * We do not sync the filesystem if we are called from a panic. If we did
697 * we might end up blowing up a sync that was already in progress.
700 hammer_vfs_sync(struct mount *mp, int waitfor)
702 struct hammer_mount *hmp = (void *)mp->mnt_data;
705 if (panicstr == NULL) {
706 error = hammer_sync_hmp(hmp, waitfor);
708 error = hammer_sync_hmp(hmp, waitfor);
716 * Convert a vnode to a file handle.
719 hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp)
723 KKASSERT(MAXFIDSZ >= 16);
725 fhp->fid_len = offsetof(struct fid, fid_data[16]);
726 fhp->fid_reserved = 0;
727 bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id));
728 bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof));
734 * Convert a file handle back to a vnode.
737 hammer_vfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
739 struct hammer_transaction trans;
740 struct hammer_inode *ip;
741 struct hammer_inode_info info;
744 bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id));
745 bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof));
747 hammer_simple_transaction(&trans, (void *)mp->mnt_data);
750 * Get/allocate the hammer_inode structure. The structure must be
751 * unlocked while we manipulate the related vnode to avoid a
754 ip = hammer_get_inode(&trans, NULL, info.obj_id,
755 info.obj_asof, HAMMER_DEF_LOCALIZATION,
761 error = hammer_get_vnode(ip, vpp);
762 hammer_rel_inode(ip, 0);
763 hammer_done_transaction(&trans);
768 hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
769 int *exflagsp, struct ucred **credanonp)
771 hammer_mount_t hmp = (void *)mp->mnt_data;
775 np = vfs_export_lookup(mp, &hmp->export, nam);
777 *exflagsp = np->netc_exflags;
778 *credanonp = &np->netc_anon;
788 hammer_vfs_export(struct mount *mp, int op, const struct export_args *export)
790 hammer_mount_t hmp = (void *)mp->mnt_data;
794 case MOUNTCTL_SET_EXPORT:
795 error = vfs_export(mp, &hmp->export, export);