2 * Copyright (c) 2011-2015 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>
6 * by Daniel Flores (GSOC 2013 - mentored by Matthew Dillon, compression)
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/nlookup.h>
39 #include <sys/vnode.h>
40 #include <sys/mount.h>
41 #include <sys/fcntl.h>
44 #include <sys/vfsops.h>
45 #include <sys/sysctl.h>
46 #include <sys/socket.h>
47 #include <sys/objcache.h>
50 #include <sys/namei.h>
51 #include <sys/mountctl.h>
52 #include <sys/dirent.h>
55 #include <sys/mutex.h>
56 #include <sys/mutex2.h>
59 #include "hammer2_disk.h"
60 #include "hammer2_mount.h"
61 #include "hammer2_lz4.h"
63 #include "zlib/hammer2_zlib.h"
65 #define REPORT_REFS_ERRORS 1 /* XXX remove me */
67 MALLOC_DEFINE(M_OBJCACHE, "objcache", "Object Cache");
69 struct hammer2_sync_info {
74 TAILQ_HEAD(hammer2_mntlist, hammer2_dev);
75 TAILQ_HEAD(hammer2_pfslist, hammer2_pfs);
76 static struct hammer2_mntlist hammer2_mntlist;
77 static struct hammer2_pfslist hammer2_pfslist;
78 static struct lock hammer2_mntlk;
81 int hammer2_cluster_read = 4; /* physical read-ahead */
82 int hammer2_cluster_write = 0; /* bdwrite() so later inval works */
83 int hammer2_dedup_enable = 1;
84 int hammer2_inval_enable = 0;
85 int hammer2_flush_pipe = 100;
86 int hammer2_synchronous_flush = 1;
87 int hammer2_dio_count;
88 long hammer2_chain_allocs;
89 long hammer2_chain_frees;
90 long hammer2_limit_dirty_chains;
91 long hammer2_count_modified_chains;
92 long hammer2_iod_invals;
93 long hammer2_iod_file_read;
94 long hammer2_iod_meta_read;
95 long hammer2_iod_indr_read;
96 long hammer2_iod_fmap_read;
97 long hammer2_iod_volu_read;
98 long hammer2_iod_file_write;
99 long hammer2_iod_file_wembed;
100 long hammer2_iod_file_wzero;
101 long hammer2_iod_file_wdedup;
102 long hammer2_iod_meta_write;
103 long hammer2_iod_indr_write;
104 long hammer2_iod_fmap_write;
105 long hammer2_iod_volu_write;
107 MALLOC_DECLARE(M_HAMMER2_CBUFFER);
108 MALLOC_DEFINE(M_HAMMER2_CBUFFER, "HAMMER2-compbuffer",
109 "Buffer used for compression.");
111 MALLOC_DECLARE(M_HAMMER2_DEBUFFER);
112 MALLOC_DEFINE(M_HAMMER2_DEBUFFER, "HAMMER2-decompbuffer",
113 "Buffer used for decompression.");
115 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem");
117 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW,
118 &hammer2_debug, 0, "");
119 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_read, CTLFLAG_RW,
120 &hammer2_cluster_read, 0, "");
121 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_write, CTLFLAG_RW,
122 &hammer2_cluster_write, 0, "");
123 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dedup_enable, CTLFLAG_RW,
124 &hammer2_dedup_enable, 0, "");
125 SYSCTL_INT(_vfs_hammer2, OID_AUTO, inval_enable, CTLFLAG_RW,
126 &hammer2_inval_enable, 0, "");
127 SYSCTL_INT(_vfs_hammer2, OID_AUTO, flush_pipe, CTLFLAG_RW,
128 &hammer2_flush_pipe, 0, "");
129 SYSCTL_INT(_vfs_hammer2, OID_AUTO, synchronous_flush, CTLFLAG_RW,
130 &hammer2_synchronous_flush, 0, "");
131 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_allocs, CTLFLAG_RW,
132 &hammer2_chain_allocs, 0, "");
133 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_frees, CTLFLAG_RW,
134 &hammer2_chain_frees, 0, "");
135 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_dirty_chains, CTLFLAG_RW,
136 &hammer2_limit_dirty_chains, 0, "");
137 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, count_modified_chains, CTLFLAG_RW,
138 &hammer2_count_modified_chains, 0, "");
139 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dio_count, CTLFLAG_RD,
140 &hammer2_dio_count, 0, "");
142 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_invals, CTLFLAG_RW,
143 &hammer2_iod_invals, 0, "");
144 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RW,
145 &hammer2_iod_file_read, 0, "");
146 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RW,
147 &hammer2_iod_meta_read, 0, "");
148 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RW,
149 &hammer2_iod_indr_read, 0, "");
150 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_read, CTLFLAG_RW,
151 &hammer2_iod_fmap_read, 0, "");
152 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_read, CTLFLAG_RW,
153 &hammer2_iod_volu_read, 0, "");
155 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RW,
156 &hammer2_iod_file_write, 0, "");
157 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wembed, CTLFLAG_RW,
158 &hammer2_iod_file_wembed, 0, "");
159 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wzero, CTLFLAG_RW,
160 &hammer2_iod_file_wzero, 0, "");
161 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wdedup, CTLFLAG_RW,
162 &hammer2_iod_file_wdedup, 0, "");
163 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RW,
164 &hammer2_iod_meta_write, 0, "");
165 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RW,
166 &hammer2_iod_indr_write, 0, "");
167 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_write, CTLFLAG_RW,
168 &hammer2_iod_fmap_write, 0, "");
169 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RW,
170 &hammer2_iod_volu_write, 0, "");
172 long hammer2_check_icrc32;
173 long hammer2_check_xxhash64;
174 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_icrc32, CTLFLAG_RW,
175 &hammer2_check_icrc32, 0, "");
176 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_xxhash64, CTLFLAG_RW,
177 &hammer2_check_xxhash64, 0, "");
179 static int hammer2_vfs_init(struct vfsconf *conf);
180 static int hammer2_vfs_uninit(struct vfsconf *vfsp);
181 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
183 static int hammer2_remount(hammer2_dev_t *, struct mount *, char *,
184 struct vnode *, struct ucred *);
185 static int hammer2_recovery(hammer2_dev_t *hmp);
186 static int hammer2_vfs_unmount(struct mount *mp, int mntflags);
187 static int hammer2_vfs_root(struct mount *mp, struct vnode **vpp);
188 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp,
190 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
192 static int hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
193 struct fid *fhp, struct vnode **vpp);
194 static int hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp);
195 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
196 int *exflagsp, struct ucred **credanonp);
198 static int hammer2_install_volume_header(hammer2_dev_t *hmp);
199 static int hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
201 static void hammer2_update_pmps(hammer2_dev_t *hmp);
203 static void hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp);
204 static void hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp,
208 * HAMMER2 vfs operations.
210 static struct vfsops hammer2_vfsops = {
211 .vfs_init = hammer2_vfs_init,
212 .vfs_uninit = hammer2_vfs_uninit,
213 .vfs_sync = hammer2_vfs_sync,
214 .vfs_mount = hammer2_vfs_mount,
215 .vfs_unmount = hammer2_vfs_unmount,
216 .vfs_root = hammer2_vfs_root,
217 .vfs_statfs = hammer2_vfs_statfs,
218 .vfs_statvfs = hammer2_vfs_statvfs,
219 .vfs_vget = hammer2_vfs_vget,
220 .vfs_vptofh = hammer2_vfs_vptofh,
221 .vfs_fhtovp = hammer2_vfs_fhtovp,
222 .vfs_checkexp = hammer2_vfs_checkexp
225 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", "");
227 VFS_SET(hammer2_vfsops, hammer2, 0);
228 MODULE_VERSION(hammer2, 1);
232 hammer2_vfs_init(struct vfsconf *conf)
234 static struct objcache_malloc_args margs_read;
235 static struct objcache_malloc_args margs_write;
236 static struct objcache_malloc_args margs_vop;
242 if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref))
244 if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data))
246 if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data))
250 kprintf("HAMMER2 structure size mismatch; cannot continue.\n");
252 margs_read.objsize = 65536;
253 margs_read.mtype = M_HAMMER2_DEBUFFER;
255 margs_write.objsize = 32768;
256 margs_write.mtype = M_HAMMER2_CBUFFER;
258 margs_vop.objsize = sizeof(hammer2_xop_t);
259 margs_vop.mtype = M_HAMMER2;
262 * Note thaht for the XOPS cache we want backing store allocations
263 * to use M_ZERO. This is not allowed in objcache_get() (to avoid
264 * confusion), so use the backing store function that does it. This
265 * means that initial XOPS objects are zerod but REUSED objects are
266 * not. So we are responsible for cleaning the object up sufficiently
267 * for our needs before objcache_put()ing it back (typically just the
270 cache_buffer_read = objcache_create(margs_read.mtype->ks_shortdesc,
271 0, 1, NULL, NULL, NULL,
272 objcache_malloc_alloc,
273 objcache_malloc_free,
275 cache_buffer_write = objcache_create(margs_write.mtype->ks_shortdesc,
276 0, 1, NULL, NULL, NULL,
277 objcache_malloc_alloc,
278 objcache_malloc_free,
280 cache_xops = objcache_create(margs_vop.mtype->ks_shortdesc,
281 0, 1, NULL, NULL, NULL,
282 objcache_malloc_alloc_zero,
283 objcache_malloc_free,
287 lockinit(&hammer2_mntlk, "mntlk", 0, 0);
288 TAILQ_INIT(&hammer2_mntlist);
289 TAILQ_INIT(&hammer2_pfslist);
291 hammer2_limit_dirty_chains = desiredvnodes / 10;
298 hammer2_vfs_uninit(struct vfsconf *vfsp __unused)
300 objcache_destroy(cache_buffer_read);
301 objcache_destroy(cache_buffer_write);
302 objcache_destroy(cache_xops);
307 * Core PFS allocator. Used to allocate the pmp structure for PFS cluster
308 * mounts and the spmp structure for media (hmp) structures.
310 * pmp->modify_tid tracks new modify_tid transaction ids for front-end
311 * transactions. Note that synchronization does not use this field.
312 * (typically frontend operations and synchronization cannot run on the
313 * same PFS node at the same time).
318 hammer2_pfsalloc(hammer2_chain_t *chain, const hammer2_inode_data_t *ripdata,
319 hammer2_tid_t modify_tid, hammer2_dev_t *force_local)
321 hammer2_inode_t *iroot;
328 * Locate or create the PFS based on the cluster id. If ripdata
329 * is NULL this is a spmp which is unique and is always allocated.
331 * If the device is mounted in local mode all PFSs are considered
332 * independent and not part of any cluster (for debugging only).
335 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
336 if (force_local != pmp->force_local)
338 if (force_local == NULL &&
339 bcmp(&pmp->pfs_clid, &ripdata->meta.pfs_clid,
340 sizeof(pmp->pfs_clid)) == 0) {
342 } else if (force_local && pmp->pfs_names[0] &&
343 strcmp(pmp->pfs_names[0], ripdata->filename) == 0) {
352 pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO);
353 pmp->force_local = force_local;
354 hammer2_trans_manage_init(pmp);
355 kmalloc_create(&pmp->minode, "HAMMER2-inodes");
356 kmalloc_create(&pmp->mmsg, "HAMMER2-pfsmsg");
357 lockinit(&pmp->lock, "pfslk", 0, 0);
358 lockinit(&pmp->lock_nlink, "h2nlink", 0, 0);
359 spin_init(&pmp->inum_spin, "hm2pfsalloc_inum");
360 spin_init(&pmp->xop_spin, "h2xop");
361 spin_init(&pmp->lru_spin, "h2lru");
362 RB_INIT(&pmp->inum_tree);
363 TAILQ_INIT(&pmp->sideq);
364 TAILQ_INIT(&pmp->lru_list);
365 spin_init(&pmp->list_spin, "hm2pfsalloc_list");
368 * Distribute backend operations to threads
370 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
371 for (j = 0; j < HAMMER2_XOPGROUPS +
372 HAMMER2_SPECTHREADS; ++j) {
373 TAILQ_INIT(&pmp->xopq[i][j]);
376 for (i = 0; i < HAMMER2_XOPGROUPS; ++i)
377 hammer2_xop_group_init(pmp, &pmp->xop_groups[i]);
380 * Save the last media transaction id for the flusher. Set
384 pmp->pfs_clid = ripdata->meta.pfs_clid;
385 TAILQ_INSERT_TAIL(&hammer2_pfslist, pmp, mntentry);
388 * The synchronization thread may start too early, make
389 * sure it stays frozen until we are ready to let it go.
393 pmp->primary_thr.flags = HAMMER2_THREAD_FROZEN |
394 HAMMER2_THREAD_REMASTER;
399 * Create the PFS's root inode.
401 if ((iroot = pmp->iroot) == NULL) {
402 iroot = hammer2_inode_get(pmp, NULL, NULL, -1);
404 hammer2_inode_ref(iroot);
405 hammer2_inode_unlock(iroot);
409 * Stop here if no chain is passed in.
415 * When a chain is passed in we must add it to the PFS's root
416 * inode, update pmp->pfs_types[], and update the syncronization
419 * When forcing local mode, mark the PFS as a MASTER regardless.
421 * At the moment empty spots can develop due to removals or failures.
422 * Ultimately we want to re-fill these spots but doing so might
423 * confused running code. XXX
425 hammer2_inode_ref(iroot);
426 hammer2_mtx_ex(&iroot->lock);
427 j = iroot->cluster.nchains;
429 kprintf("add PFS to pmp %p[%d]\n", pmp, j);
431 if (j == HAMMER2_MAXCLUSTER) {
432 kprintf("hammer2_mount: cluster full!\n");
433 /* XXX fatal error? */
435 KKASSERT(chain->pmp == NULL);
437 hammer2_chain_ref(chain);
438 iroot->cluster.array[j].chain = chain;
440 pmp->pfs_types[j] = HAMMER2_PFSTYPE_MASTER;
442 pmp->pfs_types[j] = ripdata->meta.pfs_type;
443 pmp->pfs_names[j] = kstrdup(ripdata->filename, M_HAMMER2);
444 pmp->pfs_hmps[j] = chain->hmp;
447 * If the PFS is already mounted we must account
448 * for the mount_count here.
451 ++chain->hmp->mount_count;
454 * May have to fixup dirty chain tracking. Previous
455 * pmp was NULL so nothing to undo.
457 if (chain->flags & HAMMER2_CHAIN_MODIFIED)
458 hammer2_pfs_memory_inc(pmp);
461 iroot->cluster.nchains = j;
464 * Update nmasters from any PFS inode which is part of the cluster.
465 * It is possible that this will result in a value which is too
466 * high. MASTER PFSs are authoritative for pfs_nmasters and will
467 * override this value later on.
469 * (This informs us of masters that might not currently be
470 * discoverable by this mount).
472 if (ripdata && pmp->pfs_nmasters < ripdata->meta.pfs_nmasters) {
473 pmp->pfs_nmasters = ripdata->meta.pfs_nmasters;
477 * Count visible masters. Masters are usually added with
478 * ripdata->meta.pfs_nmasters set to 1. This detects when there
479 * are more (XXX and must update the master inodes).
482 for (i = 0; i < iroot->cluster.nchains; ++i) {
483 if (pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER)
486 if (pmp->pfs_nmasters < count)
487 pmp->pfs_nmasters = count;
490 * Create missing synchronization and support threads.
492 * Single-node masters (including snapshots) have nothing to
493 * synchronize and do not require this thread.
495 * Multi-node masters or any number of soft masters, slaves, copy,
496 * or other PFS types need the thread.
498 * Each thread is responsible for its particular cluster index.
499 * We use independent threads so stalls or mismatches related to
500 * any given target do not affect other targets.
502 for (i = 0; i < iroot->cluster.nchains; ++i) {
504 * Single-node masters (including snapshots) have nothing
505 * to synchronize and will make direct xops support calls,
506 * thus they do not require this thread.
508 * Note that there can be thousands of snapshots. We do not
509 * want to create thousands of threads.
511 if (pmp->pfs_nmasters <= 1 &&
512 pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) {
517 * Sync support thread
519 if (pmp->sync_thrs[i].td == NULL) {
520 hammer2_thr_create(&pmp->sync_thrs[i], pmp,
522 hammer2_primary_sync_thread);
527 * Create missing Xop threads
530 hammer2_xop_helper_create(pmp);
532 hammer2_mtx_unlock(&iroot->lock);
533 hammer2_inode_drop(iroot);
539 * Destroy a PFS, typically only occurs after the last mount on a device
543 hammer2_pfsfree(hammer2_pfs_t *pmp)
545 hammer2_inode_t *iroot;
546 hammer2_chain_t *chain;
551 * Cleanup our reference on iroot. iroot is (should) not be needed
554 TAILQ_REMOVE(&hammer2_pfslist, pmp, mntentry);
558 for (i = 0; i < iroot->cluster.nchains; ++i) {
559 hammer2_thr_delete(&pmp->sync_thrs[i]);
560 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
561 hammer2_thr_delete(&pmp->xop_groups[j].thrs[i]);
563 #if REPORT_REFS_ERRORS
564 if (pmp->iroot->refs != 1)
565 kprintf("PMP->IROOT %p REFS WRONG %d\n",
566 pmp->iroot, pmp->iroot->refs);
568 KKASSERT(pmp->iroot->refs == 1);
570 /* ref for pmp->iroot */
571 hammer2_inode_drop(pmp->iroot);
576 * Cleanup chains remaining on LRU list.
578 kprintf("pfsfree: %p lrucount=%d\n", pmp, pmp->lru_count);
579 while ((chain = TAILQ_FIRST(&pmp->lru_list)) != NULL) {
580 hammer2_chain_ref(chain);
581 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
582 hammer2_chain_drop(chain);
586 * Free remaining pmp resources
588 kmalloc_destroy(&pmp->mmsg);
589 kmalloc_destroy(&pmp->minode);
591 kfree(pmp, M_HAMMER2);
595 * Remove all references to hmp from the pfs list. Any PFS which becomes
596 * empty is terminated and freed.
601 hammer2_pfsfree_scan(hammer2_dev_t *hmp)
604 hammer2_inode_t *iroot;
605 hammer2_chain_t *rchain;
611 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
612 if ((iroot = pmp->iroot) == NULL)
614 if (hmp->spmp == pmp) {
615 kprintf("unmount hmp %p remove spmp %p\n",
621 * Determine if this PFS is affected. If it is we must
622 * freeze all management threads and lock its iroot.
624 * Freezing a management thread forces it idle, operations
625 * in-progress will be aborted and it will have to start
626 * over again when unfrozen, or exit if told to exit.
628 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
629 if (pmp->pfs_hmps[i] == hmp)
632 if (i != HAMMER2_MAXCLUSTER) {
634 * Make sure all synchronization threads are locked
637 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
638 if (pmp->pfs_hmps[i] == NULL)
640 hammer2_thr_freeze_async(&pmp->sync_thrs[i]);
641 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
642 hammer2_thr_freeze_async(
643 &pmp->xop_groups[j].thrs[i]);
646 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
647 if (pmp->pfs_hmps[i] == NULL)
649 hammer2_thr_freeze(&pmp->sync_thrs[i]);
650 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
652 &pmp->xop_groups[j].thrs[i]);
657 * Lock the inode and clean out matching chains.
658 * Note that we cannot use hammer2_inode_lock_*()
659 * here because that would attempt to validate the
660 * cluster that we are in the middle of ripping
663 * WARNING! We are working directly on the inodes
666 hammer2_mtx_ex(&iroot->lock);
669 * Remove the chain from matching elements of the PFS.
671 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
672 if (pmp->pfs_hmps[i] != hmp)
674 hammer2_thr_delete(&pmp->sync_thrs[i]);
675 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
677 &pmp->xop_groups[j].thrs[i]);
679 rchain = iroot->cluster.array[i].chain;
680 iroot->cluster.array[i].chain = NULL;
681 pmp->pfs_types[i] = 0;
682 if (pmp->pfs_names[i]) {
683 kfree(pmp->pfs_names[i], M_HAMMER2);
684 pmp->pfs_names[i] = NULL;
687 hammer2_chain_drop(rchain);
689 if (iroot->cluster.focus == rchain)
690 iroot->cluster.focus = NULL;
692 pmp->pfs_hmps[i] = NULL;
694 hammer2_mtx_unlock(&iroot->lock);
695 didfreeze = 1; /* remaster, unfreeze down below */
701 * Cleanup trailing chains. Gaps may remain.
703 for (i = HAMMER2_MAXCLUSTER - 1; i >= 0; --i) {
704 if (pmp->pfs_hmps[i])
707 iroot->cluster.nchains = i + 1;
710 * If the PMP has no elements remaining we can destroy it.
711 * (this will transition management threads from frozen->exit).
713 if (iroot->cluster.nchains == 0) {
714 kprintf("unmount hmp %p last ref to PMP=%p\n",
716 hammer2_pfsfree(pmp);
721 * If elements still remain we need to set the REMASTER
722 * flag and unfreeze it.
725 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
726 if (pmp->pfs_hmps[i] == NULL)
728 hammer2_thr_remaster(&pmp->sync_thrs[i]);
729 hammer2_thr_unfreeze(&pmp->sync_thrs[i]);
730 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
731 hammer2_thr_remaster(
732 &pmp->xop_groups[j].thrs[i]);
733 hammer2_thr_unfreeze(
734 &pmp->xop_groups[j].thrs[i]);
742 * Mount or remount HAMMER2 fileystem from physical media
745 * mp mount point structure
751 * mp mount point structure
752 * path path to mount point
753 * data pointer to argument structure in user space
754 * volume volume path (device@LABEL form)
755 * hflags user mount flags
756 * cred user credentials
763 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
766 struct hammer2_mount_info info;
770 hammer2_dev_t *force_local;
771 hammer2_key_t key_next;
772 hammer2_key_t key_dummy;
775 struct nlookupdata nd;
776 hammer2_chain_t *parent;
777 hammer2_chain_t *chain;
778 hammer2_cluster_t *cluster;
779 const hammer2_inode_data_t *ripdata;
780 hammer2_blockref_t bref;
782 char devstr[MNAMELEN];
799 kprintf("hammer2_mount\n");
805 bzero(&info, sizeof(info));
806 info.cluster_fd = -1;
807 ksnprintf(devstr, sizeof(devstr), "%s",
808 mp->mnt_stat.f_mntfromname);
809 kprintf("hammer2_mount: root '%s'\n", devstr);
812 * Non-root mount or updating a mount
814 error = copyin(data, &info, sizeof(info));
818 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done);
823 /* Extract device and label */
825 label = strchr(devstr, '@');
827 ((label + 1) - dev) > done) {
835 if (mp->mnt_flag & MNT_UPDATE) {
837 * Update mount. Note that pmp->iroot->cluster is
838 * an inode-embedded cluster and thus cannot be
841 * XXX HAMMER2 needs to implement NFS export via
845 pmp->hflags = info.hflags;
846 cluster = &pmp->iroot->cluster;
847 for (i = 0; i < cluster->nchains; ++i) {
848 if (cluster->array[i].chain == NULL)
850 hmp = cluster->array[i].chain->hmp;
852 error = hammer2_remount(hmp, mp, path,
864 * Lookup name and verify it refers to a block device.
867 error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW);
869 error = nlookup(&nd);
871 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
875 cdev_t cdev = kgetdiskbyname(dev);
876 error = bdevvp(cdev, &devvp);
878 kprintf("hammer2: cannot find '%s'\n", dev);
882 if (vn_isdisk(devvp, &error))
883 error = vfs_mountedon(devvp);
887 * Determine if the device has already been mounted. After this
888 * check hmp will be non-NULL if we are doing the second or more
889 * hammer2 mounts from the same device.
891 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
892 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
893 if (hmp->devvp == devvp)
898 * Open the device if this isn't a secondary mount and construct
899 * the H2 device mount (hmp).
902 hammer2_chain_t *schain;
905 if (error == 0 && vcount(devvp) > 0)
909 * Now open the device
912 ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
913 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
914 error = vinvalbuf(devvp, V_SAVE, 0, 0);
916 error = VOP_OPEN(devvp,
917 ronly ? FREAD : FREAD | FWRITE,
922 if (error && devvp) {
927 lockmgr(&hammer2_mntlk, LK_RELEASE);
930 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO);
931 ksnprintf(hmp->devrepname, sizeof(hmp->devrepname), "%s", dev);
934 hmp->hflags = info.hflags & HMNT2_DEVFLAGS;
935 kmalloc_create(&hmp->mchain, "HAMMER2-chains");
936 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry);
937 RB_INIT(&hmp->iotree);
938 spin_init(&hmp->io_spin, "hm2mount_io");
939 spin_init(&hmp->list_spin, "hm2mount_list");
940 TAILQ_INIT(&hmp->flushq);
942 lockinit(&hmp->vollk, "h2vol", 0, 0);
943 lockinit(&hmp->bulklk, "h2bulk", 0, 0);
946 * vchain setup. vchain.data is embedded.
947 * vchain.refs is initialized and will never drop to 0.
949 * NOTE! voldata is not yet loaded.
951 hmp->vchain.hmp = hmp;
952 hmp->vchain.refs = 1;
953 hmp->vchain.data = (void *)&hmp->voldata;
954 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME;
955 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
956 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
958 hammer2_chain_core_init(&hmp->vchain);
959 /* hmp->vchain.u.xxx is left NULL */
962 * fchain setup. fchain.data is embedded.
963 * fchain.refs is initialized and will never drop to 0.
965 * The data is not used but needs to be initialized to
966 * pass assertion muster. We use this chain primarily
967 * as a placeholder for the freemap's top-level RBTREE
968 * so it does not interfere with the volume's topology
971 hmp->fchain.hmp = hmp;
972 hmp->fchain.refs = 1;
973 hmp->fchain.data = (void *)&hmp->voldata.freemap_blockset;
974 hmp->fchain.bref.type = HAMMER2_BREF_TYPE_FREEMAP;
975 hmp->fchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
976 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
977 hmp->fchain.bref.methods =
978 HAMMER2_ENC_CHECK(HAMMER2_CHECK_FREEMAP) |
979 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE);
981 hammer2_chain_core_init(&hmp->fchain);
982 /* hmp->fchain.u.xxx is left NULL */
985 * Install the volume header and initialize fields from
988 error = hammer2_install_volume_header(hmp);
990 hammer2_unmount_helper(mp, NULL, hmp);
991 lockmgr(&hammer2_mntlk, LK_RELEASE);
992 hammer2_vfs_unmount(mp, MNT_FORCE);
997 * Really important to get these right or flush will get
1000 hmp->spmp = hammer2_pfsalloc(NULL, NULL, 0, NULL);
1001 kprintf("alloc spmp %p tid %016jx\n",
1002 hmp->spmp, hmp->voldata.mirror_tid);
1006 * Dummy-up vchain and fchain's modify_tid. mirror_tid
1007 * is inherited from the volume header.
1010 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1011 hmp->vchain.bref.modify_tid = hmp->vchain.bref.mirror_tid;
1012 hmp->vchain.pmp = spmp;
1013 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1014 hmp->fchain.bref.modify_tid = hmp->fchain.bref.mirror_tid;
1015 hmp->fchain.pmp = spmp;
1018 * First locate the super-root inode, which is key 0
1019 * relative to the volume header's blockset.
1021 * Then locate the root inode by scanning the directory keyspace
1022 * represented by the label.
1024 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
1025 schain = hammer2_chain_lookup(&parent, &key_dummy,
1026 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY,
1028 hammer2_chain_lookup_done(parent);
1029 if (schain == NULL) {
1030 kprintf("hammer2_mount: invalid super-root\n");
1031 hammer2_unmount_helper(mp, NULL, hmp);
1032 lockmgr(&hammer2_mntlk, LK_RELEASE);
1033 hammer2_vfs_unmount(mp, MNT_FORCE);
1036 if (schain->error) {
1037 kprintf("hammer2_mount: error %s reading super-root\n",
1038 hammer2_error_str(schain->error));
1039 hammer2_chain_unlock(schain);
1040 hammer2_chain_drop(schain);
1042 hammer2_unmount_helper(mp, NULL, hmp);
1043 lockmgr(&hammer2_mntlk, LK_RELEASE);
1044 hammer2_vfs_unmount(mp, MNT_FORCE);
1049 * The super-root always uses an inode_tid of 1 when
1052 spmp->inode_tid = 1;
1053 spmp->modify_tid = schain->bref.modify_tid + 1;
1056 * Sanity-check schain's pmp and finish initialization.
1057 * Any chain belonging to the super-root topology should
1058 * have a NULL pmp (not even set to spmp).
1060 ripdata = &hammer2_chain_rdata(schain)->ipdata;
1061 KKASSERT(schain->pmp == NULL);
1062 spmp->pfs_clid = ripdata->meta.pfs_clid;
1065 * Replace the dummy spmp->iroot with a real one. It's
1066 * easier to just do a wholesale replacement than to try
1067 * to update the chain and fixup the iroot fields.
1069 * The returned inode is locked with the supplied cluster.
1071 cluster = hammer2_cluster_from_chain(schain);
1072 hammer2_inode_drop(spmp->iroot);
1074 spmp->iroot = hammer2_inode_get(spmp, NULL, cluster, -1);
1075 spmp->spmp_hmp = hmp;
1076 spmp->pfs_types[0] = ripdata->meta.pfs_type;
1077 spmp->pfs_hmps[0] = hmp;
1078 hammer2_inode_ref(spmp->iroot);
1079 hammer2_inode_unlock(spmp->iroot);
1080 hammer2_cluster_unlock(cluster);
1081 hammer2_cluster_drop(cluster);
1083 /* leave spmp->iroot with one ref */
1085 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
1086 error = hammer2_recovery(hmp);
1087 /* XXX do something with error */
1089 hammer2_update_pmps(hmp);
1090 hammer2_iocom_init(hmp);
1093 * Ref the cluster management messaging descriptor. The mount
1094 * program deals with the other end of the communications pipe.
1096 * Root mounts typically do not supply one.
1098 if (info.cluster_fd >= 0) {
1099 fp = holdfp(curproc->p_fd, info.cluster_fd, -1);
1101 hammer2_cluster_reconnect(hmp, fp);
1103 kprintf("hammer2_mount: bad cluster_fd!\n");
1108 if (info.hflags & HMNT2_DEVFLAGS) {
1109 kprintf("hammer2: Warning: mount flags pertaining "
1110 "to the whole device may only be specified "
1111 "on the first mount of the device: %08x\n",
1112 info.hflags & HMNT2_DEVFLAGS);
1117 * Force local mount (disassociate all PFSs from their clusters).
1118 * Used primarily for debugging.
1120 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1123 * Lookup the mount point under the media-localized super-root.
1124 * Scanning hammer2_pfslist doesn't help us because it represents
1125 * PFS cluster ids which can aggregate several named PFSs together.
1127 * cluster->pmp will incorrectly point to spmp and must be fixed
1130 hammer2_inode_lock(spmp->iroot, 0);
1131 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1132 lhc = hammer2_dirhash(label, strlen(label));
1133 chain = hammer2_chain_lookup(&parent, &key_next,
1134 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1137 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1138 strcmp(label, chain->data->ipdata.filename) == 0) {
1141 chain = hammer2_chain_next(&parent, chain, &key_next,
1143 lhc + HAMMER2_DIRHASH_LOMASK,
1147 hammer2_chain_unlock(parent);
1148 hammer2_chain_drop(parent);
1150 hammer2_inode_unlock(spmp->iroot);
1153 * PFS could not be found?
1155 if (chain == NULL) {
1156 kprintf("hammer2_mount: PFS label not found\n");
1157 hammer2_unmount_helper(mp, NULL, hmp);
1158 lockmgr(&hammer2_mntlk, LK_RELEASE);
1159 hammer2_vfs_unmount(mp, MNT_FORCE);
1165 * Acquire the pmp structure (it should have already been allocated
1166 * via hammer2_update_pmps() so do not pass cluster in to add to
1167 * available chains).
1169 * Check if the cluster has already been mounted. A cluster can
1170 * only be mounted once, use null mounts to mount additional copies.
1172 ripdata = &chain->data->ipdata;
1174 pmp = hammer2_pfsalloc(NULL, ripdata, bref.modify_tid, force_local);
1175 hammer2_chain_unlock(chain);
1176 hammer2_chain_drop(chain);
1179 kprintf("hammer2_mount: PFS already mounted!\n");
1180 hammer2_unmount_helper(mp, NULL, hmp);
1181 lockmgr(&hammer2_mntlk, LK_RELEASE);
1182 hammer2_vfs_unmount(mp, MNT_FORCE);
1190 kprintf("hammer2_mount hmp=%p pmp=%p\n", hmp, pmp);
1192 pmp->hflags = info.hflags;
1193 mp->mnt_flag = MNT_LOCAL;
1194 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */
1195 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
1198 * required mount structure initializations
1200 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE;
1201 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE;
1203 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE;
1204 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1209 mp->mnt_iosize_max = MAXPHYS;
1212 * Connect up mount pointers.
1214 hammer2_mount_helper(mp, pmp);
1216 lockmgr(&hammer2_mntlk, LK_RELEASE);
1222 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops);
1223 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops);
1224 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops);
1227 copyinstr(info.volume, mp->mnt_stat.f_mntfromname,
1228 MNAMELEN - 1, &size);
1229 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
1230 } /* else root mount, already in there */
1232 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname));
1234 copyinstr(path, mp->mnt_stat.f_mntonname,
1235 sizeof(mp->mnt_stat.f_mntonname) - 1,
1239 mp->mnt_stat.f_mntonname[0] = '/';
1243 * Initial statfs to prime mnt_stat.
1245 hammer2_vfs_statfs(mp, &mp->mnt_stat, cred);
1251 * Scan PFSs under the super-root and create hammer2_pfs structures.
1255 hammer2_update_pmps(hammer2_dev_t *hmp)
1257 const hammer2_inode_data_t *ripdata;
1258 hammer2_chain_t *parent;
1259 hammer2_chain_t *chain;
1260 hammer2_blockref_t bref;
1261 hammer2_dev_t *force_local;
1262 hammer2_pfs_t *spmp;
1264 hammer2_key_t key_next;
1265 int cache_index = -1;
1268 * Force local mount (disassociate all PFSs from their clusters).
1269 * Used primarily for debugging.
1271 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1274 * Lookup mount point under the media-localized super-root.
1276 * cluster->pmp will incorrectly point to spmp and must be fixed
1280 hammer2_inode_lock(spmp->iroot, 0);
1281 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1282 chain = hammer2_chain_lookup(&parent, &key_next,
1283 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX,
1286 if (chain->bref.type != HAMMER2_BREF_TYPE_INODE)
1288 ripdata = &chain->data->ipdata;
1290 kprintf("ADD LOCAL PFS: %s\n", ripdata->filename);
1292 pmp = hammer2_pfsalloc(chain, ripdata,
1293 bref.modify_tid, force_local);
1294 chain = hammer2_chain_next(&parent, chain, &key_next,
1295 key_next, HAMMER2_KEY_MAX,
1299 hammer2_chain_unlock(parent);
1300 hammer2_chain_drop(parent);
1302 hammer2_inode_unlock(spmp->iroot);
1307 hammer2_remount(hammer2_dev_t *hmp, struct mount *mp, char *path __unused,
1308 struct vnode *devvp, struct ucred *cred)
1312 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
1313 error = hammer2_recovery(hmp);
1322 hammer2_vfs_unmount(struct mount *mp, int mntflags)
1333 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
1336 * If mount initialization proceeded far enough we must flush
1337 * its vnodes and sync the underlying mount points. Three syncs
1338 * are required to fully flush the filesystem (freemap updates lag
1339 * by one flush, and one extra for safety).
1341 if (mntflags & MNT_FORCE)
1346 error = vflush(mp, 0, flags);
1349 hammer2_vfs_sync(mp, MNT_WAIT);
1350 hammer2_vfs_sync(mp, MNT_WAIT);
1351 hammer2_vfs_sync(mp, MNT_WAIT);
1355 * Cleanup the frontend support XOPS threads
1357 hammer2_xop_helper_cleanup(pmp);
1360 hammer2_unmount_helper(mp, pmp, NULL);
1364 lockmgr(&hammer2_mntlk, LK_RELEASE);
1370 * Mount helper, hook the system mount into our PFS.
1371 * The mount lock is held.
1373 * We must bump the mount_count on related devices for any
1378 hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp)
1380 hammer2_cluster_t *cluster;
1381 hammer2_chain_t *rchain;
1384 mp->mnt_data = (qaddr_t)pmp;
1388 * After pmp->mp is set we have to adjust hmp->mount_count.
1390 cluster = &pmp->iroot->cluster;
1391 for (i = 0; i < cluster->nchains; ++i) {
1392 rchain = cluster->array[i].chain;
1395 ++rchain->hmp->mount_count;
1396 kprintf("hammer2_mount hmp=%p ++mount_count=%d\n",
1397 rchain->hmp, rchain->hmp->mount_count);
1401 * Create missing Xop threads
1403 hammer2_xop_helper_create(pmp);
1407 * Mount helper, unhook the system mount from our PFS.
1408 * The mount lock is held.
1410 * If hmp is supplied a mount responsible for being the first to open
1411 * the block device failed and the block device and all PFSs using the
1412 * block device must be cleaned up.
1414 * If pmp is supplied multiple devices might be backing the PFS and each
1415 * must be disconnected. This might not be the last PFS using some of the
1416 * underlying devices. Also, we have to adjust our hmp->mount_count
1417 * accounting for the devices backing the pmp which is now undergoing an
1422 hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, hammer2_dev_t *hmp)
1424 hammer2_cluster_t *cluster;
1425 hammer2_chain_t *rchain;
1426 struct vnode *devvp;
1432 * If no device supplied this is a high-level unmount and we have to
1433 * to disconnect the mount, adjust mount_count, and locate devices
1434 * that might now have no mounts.
1437 KKASSERT(hmp == NULL);
1438 KKASSERT((void *)(intptr_t)mp->mnt_data == pmp);
1440 mp->mnt_data = NULL;
1443 * After pmp->mp is cleared we have to account for
1446 cluster = &pmp->iroot->cluster;
1447 for (i = 0; i < cluster->nchains; ++i) {
1448 rchain = cluster->array[i].chain;
1451 --rchain->hmp->mount_count;
1452 kprintf("hammer2_unmount hmp=%p --mount_count=%d\n",
1453 rchain->hmp, rchain->hmp->mount_count);
1454 /* scrapping hmp now may invalidate the pmp */
1457 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1458 if (hmp->mount_count == 0) {
1459 hammer2_unmount_helper(NULL, NULL, hmp);
1467 * Try to terminate the block device. We can't terminate it if
1468 * there are still PFSs referencing it.
1470 kprintf("hammer2_unmount hmp=%p mount_count=%d\n",
1471 hmp, hmp->mount_count);
1472 if (hmp->mount_count)
1475 hammer2_pfsfree_scan(hmp);
1476 hammer2_dev_exlock(hmp); /* XXX order */
1479 * Cycle the volume data lock as a safety (probably not needed any
1480 * more). To ensure everything is out we need to flush at least
1481 * three times. (1) The running of the sideq can dirty the
1482 * filesystem, (2) A normal flush can dirty the freemap, and
1483 * (3) ensure that the freemap is fully synchronized.
1485 * The next mount's recovery scan can clean everything up but we want
1486 * to leave the filesystem in a 100% clean state on a normal unmount.
1489 hammer2_voldata_lock(hmp);
1490 hammer2_voldata_unlock(hmp);
1492 hammer2_iocom_uninit(hmp);
1494 if ((hmp->vchain.flags | hmp->fchain.flags) &
1495 HAMMER2_CHAIN_FLUSH_MASK) {
1496 kprintf("hammer2_unmount: chains left over "
1497 "after final sync\n");
1498 kprintf(" vchain %08x\n", hmp->vchain.flags);
1499 kprintf(" fchain %08x\n", hmp->fchain.flags);
1501 if (hammer2_debug & 0x0010)
1502 Debugger("entered debugger");
1505 KKASSERT(hmp->spmp == NULL);
1508 * Finish up with the device vnode
1510 if ((devvp = hmp->devvp) != NULL) {
1511 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1512 vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0);
1514 VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE), NULL);
1521 * Clear vchain/fchain flags that might prevent final cleanup
1524 if (hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) {
1525 atomic_add_long(&hammer2_count_modified_chains, -1);
1526 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED);
1527 hammer2_pfs_memory_wakeup(hmp->vchain.pmp);
1529 if (hmp->vchain.flags & HAMMER2_CHAIN_UPDATE) {
1530 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_UPDATE);
1533 if (hmp->fchain.flags & HAMMER2_CHAIN_MODIFIED) {
1534 atomic_add_long(&hammer2_count_modified_chains, -1);
1535 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_MODIFIED);
1536 hammer2_pfs_memory_wakeup(hmp->fchain.pmp);
1538 if (hmp->fchain.flags & HAMMER2_CHAIN_UPDATE) {
1539 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_UPDATE);
1543 * Final drop of embedded freemap root chain to
1544 * clean up fchain.core (fchain structure is not
1545 * flagged ALLOCATED so it is cleaned out and then
1548 hammer2_chain_drop(&hmp->fchain);
1551 * Final drop of embedded volume root chain to clean
1552 * up vchain.core (vchain structure is not flagged
1553 * ALLOCATED so it is cleaned out and then left to
1557 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt, 'v');
1559 hammer2_dump_chain(&hmp->fchain, 0, &dumpcnt, 'f');
1560 hammer2_dev_unlock(hmp);
1561 hammer2_chain_drop(&hmp->vchain);
1563 hammer2_io_cleanup(hmp, &hmp->iotree);
1564 if (hmp->iofree_count) {
1565 kprintf("io_cleanup: %d I/O's left hanging\n",
1569 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry);
1570 kmalloc_destroy(&hmp->mchain);
1571 kfree(hmp, M_HAMMER2);
1575 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp,
1576 ino_t ino, struct vnode **vpp)
1578 hammer2_xop_lookup_t *xop;
1580 hammer2_inode_t *ip;
1584 inum = (hammer2_tid_t)ino & HAMMER2_DIRHASH_USERMSK;
1590 * Easy if we already have it cached
1592 ip = hammer2_inode_lookup(pmp, inum);
1594 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED);
1595 *vpp = hammer2_igetv(ip, &error);
1596 hammer2_inode_unlock(ip);
1597 hammer2_inode_drop(ip); /* from lookup */
1603 * Otherwise we have to find the inode
1605 xop = hammer2_xop_alloc(pmp->iroot, 0);
1607 hammer2_xop_start(&xop->head, hammer2_xop_lookup);
1608 error = hammer2_xop_collect(&xop->head, 0);
1611 if (hammer2_cluster_rdata(&xop->head.cluster) == NULL) {
1612 kprintf("vget: no collect error but also no rdata\n");
1613 kprintf("xop %p\n", xop);
1614 while ((hammer2_debug & 0x80000) == 0) {
1615 tsleep(xop, PCATCH, "wait", hz * 10);
1619 ip = hammer2_inode_get(pmp, NULL, &xop->head.cluster, -1);
1622 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1625 *vpp = hammer2_igetv(ip, &error);
1626 hammer2_inode_unlock(ip);
1636 hammer2_vfs_root(struct mount *mp, struct vnode **vpp)
1643 if (pmp->iroot == NULL) {
1649 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1651 while (pmp->inode_tid == 0) {
1652 hammer2_xop_ipcluster_t *xop;
1653 hammer2_inode_meta_t *meta;
1655 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING);
1656 hammer2_xop_start(&xop->head, hammer2_xop_ipcluster);
1657 error = hammer2_xop_collect(&xop->head, 0);
1660 meta = &xop->head.cluster.focus->data->ipdata.meta;
1661 pmp->iroot->meta = *meta;
1662 pmp->inode_tid = meta->pfs_inum + 1;
1663 if (pmp->inode_tid < HAMMER2_INODE_START)
1664 pmp->inode_tid = HAMMER2_INODE_START;
1666 xop->head.cluster.focus->bref.modify_tid + 1;
1667 kprintf("PFS: Starting inode %jd\n",
1668 (intmax_t)pmp->inode_tid);
1669 kprintf("PMP focus good set nextino=%ld mod=%016jx\n",
1670 pmp->inode_tid, pmp->modify_tid);
1671 wakeup(&pmp->iroot);
1673 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1676 * Prime the mount info.
1678 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL);
1685 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1686 hammer2_inode_unlock(pmp->iroot);
1687 error = tsleep(&pmp->iroot, PCATCH, "h2root", hz);
1688 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1694 hammer2_inode_unlock(pmp->iroot);
1697 vp = hammer2_igetv(pmp->iroot, &error);
1698 hammer2_inode_unlock(pmp->iroot);
1708 * XXX incorporate ipdata->meta.inode_quota and data_quota
1712 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
1716 hammer2_blockref_t bref;
1720 * NOTE: iroot might not have validated the cluster yet.
1724 mp->mnt_stat.f_files = 0;
1725 mp->mnt_stat.f_ffree = 0;
1726 mp->mnt_stat.f_blocks = 0;
1727 mp->mnt_stat.f_bfree = 0;
1728 mp->mnt_stat.f_bavail = 0;
1730 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1731 hmp = pmp->pfs_hmps[i];
1734 if (pmp->iroot->cluster.array[i].chain)
1735 bref = pmp->iroot->cluster.array[i].chain->bref;
1737 bzero(&bref, sizeof(bref));
1739 mp->mnt_stat.f_files = bref.inode_count;
1740 mp->mnt_stat.f_ffree = 0;
1742 mp->mnt_stat.f_blocks = (bref.data_count +
1743 hmp->voldata.allocator_free) /
1744 mp->mnt_vstat.f_bsize;
1745 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free /
1746 mp->mnt_vstat.f_bsize;
1748 mp->mnt_stat.f_blocks = hmp->voldata.allocator_size /
1749 mp->mnt_vstat.f_bsize;
1750 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free /
1751 mp->mnt_vstat.f_bsize;
1752 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
1754 *sbp = mp->mnt_stat;
1761 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
1765 hammer2_blockref_t bref;
1769 * NOTE: iroot might not have validated the cluster yet.
1773 mp->mnt_vstat.f_bsize = 0;
1774 mp->mnt_vstat.f_files = 0;
1775 mp->mnt_vstat.f_ffree = 0;
1776 mp->mnt_vstat.f_blocks = 0;
1777 mp->mnt_vstat.f_bfree = 0;
1778 mp->mnt_vstat.f_bavail = 0;
1780 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1781 hmp = pmp->pfs_hmps[i];
1784 if (pmp->iroot->cluster.array[i].chain)
1785 bref = pmp->iroot->cluster.array[i].chain->bref;
1787 bzero(&bref, sizeof(bref));
1789 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1790 mp->mnt_vstat.f_files = bref.inode_count;
1791 mp->mnt_vstat.f_ffree = 0;
1793 mp->mnt_vstat.f_blocks = (bref.data_count +
1794 hmp->voldata.allocator_free) /
1795 mp->mnt_vstat.f_bsize;
1796 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free /
1797 mp->mnt_vstat.f_bsize;
1799 mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size /
1800 mp->mnt_vstat.f_bsize;
1801 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free /
1802 mp->mnt_vstat.f_bsize;
1803 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree;
1805 *sbp = mp->mnt_vstat;
1811 * Mount-time recovery (RW mounts)
1813 * Updates to the free block table are allowed to lag flushes by one
1814 * transaction. In case of a crash, then on a fresh mount we must do an
1815 * incremental scan of the last committed transaction id and make sure that
1816 * all related blocks have been marked allocated.
1818 * The super-root topology and each PFS has its own transaction id domain,
1819 * so we must track PFS boundary transitions.
1821 struct hammer2_recovery_elm {
1822 TAILQ_ENTRY(hammer2_recovery_elm) entry;
1823 hammer2_chain_t *chain;
1824 hammer2_tid_t sync_tid;
1827 TAILQ_HEAD(hammer2_recovery_list, hammer2_recovery_elm);
1829 struct hammer2_recovery_info {
1830 struct hammer2_recovery_list list;
1835 static int hammer2_recovery_scan(hammer2_dev_t *hmp,
1836 hammer2_chain_t *parent,
1837 struct hammer2_recovery_info *info,
1838 hammer2_tid_t sync_tid);
1840 #define HAMMER2_RECOVERY_MAXDEPTH 10
1844 hammer2_recovery(hammer2_dev_t *hmp)
1846 struct hammer2_recovery_info info;
1847 struct hammer2_recovery_elm *elm;
1848 hammer2_chain_t *parent;
1849 hammer2_tid_t sync_tid;
1850 hammer2_tid_t mirror_tid;
1852 int cumulative_error = 0;
1854 hammer2_trans_init(hmp->spmp, 0);
1856 sync_tid = hmp->voldata.freemap_tid;
1857 mirror_tid = hmp->voldata.mirror_tid;
1859 kprintf("hammer2 mount \"%s\": ", hmp->devrepname);
1860 if (sync_tid >= mirror_tid) {
1861 kprintf(" no recovery needed\n");
1863 kprintf(" freemap recovery %016jx-%016jx\n",
1864 sync_tid + 1, mirror_tid);
1867 TAILQ_INIT(&info.list);
1869 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
1870 cumulative_error = hammer2_recovery_scan(hmp, parent, &info, sync_tid);
1871 hammer2_chain_lookup_done(parent);
1873 while ((elm = TAILQ_FIRST(&info.list)) != NULL) {
1874 TAILQ_REMOVE(&info.list, elm, entry);
1875 parent = elm->chain;
1876 sync_tid = elm->sync_tid;
1877 kfree(elm, M_HAMMER2);
1879 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
1880 error = hammer2_recovery_scan(hmp, parent, &info,
1881 hmp->voldata.freemap_tid);
1882 hammer2_chain_unlock(parent);
1883 hammer2_chain_drop(parent); /* drop elm->chain ref */
1885 cumulative_error = error;
1887 hammer2_trans_done(hmp->spmp);
1889 return cumulative_error;
1894 hammer2_recovery_scan(hammer2_dev_t *hmp, hammer2_chain_t *parent,
1895 struct hammer2_recovery_info *info,
1896 hammer2_tid_t sync_tid)
1898 const hammer2_inode_data_t *ripdata;
1899 hammer2_chain_t *chain;
1900 hammer2_blockref_t bref;
1902 int cumulative_error = 0;
1907 * Adjust freemap to ensure that the block(s) are marked allocated.
1909 if (parent->bref.type != HAMMER2_BREF_TYPE_VOLUME) {
1910 hammer2_freemap_adjust(hmp, &parent->bref,
1911 HAMMER2_FREEMAP_DORECOVER);
1915 * Check type for recursive scan
1917 switch(parent->bref.type) {
1918 case HAMMER2_BREF_TYPE_VOLUME:
1919 /* data already instantiated */
1921 case HAMMER2_BREF_TYPE_INODE:
1923 * Must instantiate data for DIRECTDATA test and also
1926 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
1927 ripdata = &hammer2_chain_rdata(parent)->ipdata;
1928 if (ripdata->meta.op_flags & HAMMER2_OPFLAG_DIRECTDATA) {
1929 /* not applicable to recovery scan */
1930 hammer2_chain_unlock(parent);
1933 hammer2_chain_unlock(parent);
1935 case HAMMER2_BREF_TYPE_INDIRECT:
1937 * Must instantiate data for recursion
1939 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
1940 hammer2_chain_unlock(parent);
1942 case HAMMER2_BREF_TYPE_DATA:
1943 case HAMMER2_BREF_TYPE_FREEMAP:
1944 case HAMMER2_BREF_TYPE_FREEMAP_NODE:
1945 case HAMMER2_BREF_TYPE_FREEMAP_LEAF:
1946 /* not applicable to recovery scan */
1954 * Defer operation if depth limit reached or if we are crossing a
1957 if (info->depth >= HAMMER2_RECOVERY_MAXDEPTH) {
1958 struct hammer2_recovery_elm *elm;
1960 elm = kmalloc(sizeof(*elm), M_HAMMER2, M_ZERO | M_WAITOK);
1961 elm->chain = parent;
1962 elm->sync_tid = sync_tid;
1963 hammer2_chain_ref(parent);
1964 TAILQ_INSERT_TAIL(&info->list, elm, entry);
1965 /* unlocked by caller */
1972 * Recursive scan of the last flushed transaction only. We are
1973 * doing this without pmp assignments so don't leave the chains
1974 * hanging around after we are done with them.
1980 while (hammer2_chain_scan(parent, &chain, &bref,
1981 &first, &cache_index,
1982 HAMMER2_LOOKUP_NODATA) != NULL) {
1986 if (chain == NULL) {
1987 if (bref.mirror_tid > sync_tid) {
1988 hammer2_freemap_adjust(hmp, &bref,
1989 HAMMER2_FREEMAP_DORECOVER);
1995 * This may or may not be a recursive node.
1997 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
1998 if (bref.mirror_tid > sync_tid) {
2000 error = hammer2_recovery_scan(hmp, chain,
2004 cumulative_error = error;
2008 * Flush the recovery at the PFS boundary to stage it for
2009 * the final flush of the super-root topology.
2011 if ((bref.flags & HAMMER2_BREF_FLAG_PFSROOT) &&
2012 (chain->flags & HAMMER2_CHAIN_ONFLUSH)) {
2013 hammer2_flush(chain, HAMMER2_FLUSH_TOP);
2017 return cumulative_error;
2021 * Sync a mount point; this is called on a per-mount basis from the
2022 * filesystem syncer process periodically and whenever a user issues
2026 hammer2_vfs_sync(struct mount *mp, int waitfor)
2028 hammer2_xop_flush_t *xop;
2029 struct hammer2_sync_info info;
2030 hammer2_inode_t *iroot;
2038 KKASSERT(iroot->pmp == pmp);
2041 * We can't acquire locks on existing vnodes while in a transaction
2042 * without risking a deadlock. This assumes that vfsync() can be
2043 * called without the vnode locked (which it can in DragonFly).
2044 * Otherwise we'd have to implement a multi-pass or flag the lock
2045 * failures and retry.
2047 * The reclamation code interlocks with the sync list's token
2048 * (by removing the vnode from the scan list) before unlocking
2049 * the inode, giving us time to ref the inode.
2051 /*flags = VMSC_GETVP;*/
2053 if (waitfor & MNT_LAZY)
2054 flags |= VMSC_ONEPASS;
2058 * Preflush the vnodes using a normal transaction before interlocking
2059 * with a flush transaction. We do this to try to run as much of
2060 * the compression as possible outside the flush transaction.
2062 hammer2_trans_init(pmp, 0);
2064 info.waitfor = MNT_NOWAIT;
2065 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2066 hammer2_trans_done(pmp);
2070 * Start our flush transaction. This does not return until all
2071 * concurrent transactions have completed and will prevent any
2072 * new transactions from running concurrently, except for the
2073 * buffer cache transactions.
2075 * For efficiency do an async pass before making sure with a
2076 * synchronous pass on all related buffer cache buffers. It
2077 * should theoretically not be possible for any new file buffers
2078 * to be instantiated during this sequence.
2080 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH |
2081 HAMMER2_TRANS_PREFLUSH);
2082 hammer2_inode_run_sideq(pmp);
2085 info.waitfor = MNT_NOWAIT;
2086 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2087 info.waitfor = MNT_WAIT;
2088 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2091 * Clear PREFLUSH. This prevents (or asserts on) any new logical
2092 * buffer cache flushes which occur during the flush. Device buffers
2095 hammer2_bioq_sync(pmp);
2096 hammer2_trans_clear_preflush(pmp);
2099 * Use the XOP interface to concurrently flush all nodes to
2100 * synchronize the PFSROOT subtopology to the media. A standard
2101 * end-of-scan ENOENT error indicates cluster sufficiency.
2103 * Note that this flush will not be visible on crash recovery until
2104 * we flush the super-root topology in the next loop.
2106 * XXX For now wait for all flushes to complete.
2109 xop = hammer2_xop_alloc(iroot, HAMMER2_XOP_MODIFYING);
2110 hammer2_xop_start(&xop->head, hammer2_inode_xop_flush);
2111 error = hammer2_xop_collect(&xop->head,
2112 HAMMER2_XOP_COLLECT_WAITALL);
2113 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
2114 if (error == ENOENT)
2119 hammer2_trans_done(pmp);
2127 * Note that we ignore the tranasction mtid we got above. Instead,
2128 * each vfsync below will ultimately get its own via TRANS_BUFCACHE
2132 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
2134 struct hammer2_sync_info *info = data;
2135 hammer2_inode_t *ip;
2139 * Degenerate cases. Note that ip == NULL typically means the
2140 * syncer vnode itself and we don't want to vclrisdirty() in that
2147 if (vp->v_type == VNON || vp->v_type == VBAD) {
2153 * VOP_FSYNC will start a new transaction so replicate some code
2154 * here to do it inline (see hammer2_vop_fsync()).
2156 * WARNING: The vfsync interacts with the buffer cache and might
2157 * block, we can't hold the inode lock at that time.
2158 * However, we MUST ref ip before blocking to ensure that
2159 * it isn't ripped out from under us (since we do not
2160 * hold a lock on the vnode).
2162 hammer2_inode_ref(ip);
2163 if ((ip->flags & HAMMER2_INODE_MODIFIED) ||
2164 !RB_EMPTY(&vp->v_rbdirty_tree)) {
2165 vfsync(vp, info->waitfor, 1, NULL, NULL);
2166 if (ip->flags & (HAMMER2_INODE_RESIZED |
2167 HAMMER2_INODE_MODIFIED)) {
2168 hammer2_inode_lock(ip, 0);
2169 hammer2_inode_chain_sync(ip);
2170 hammer2_inode_unlock(ip);
2173 if ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 &&
2174 RB_EMPTY(&vp->v_rbdirty_tree)) {
2178 hammer2_inode_drop(ip);
2182 info->error = error;
2189 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp)
2191 hammer2_inode_t *ip;
2193 KKASSERT(MAXFIDSZ >= 16);
2195 fhp->fid_len = offsetof(struct fid, fid_data[16]);
2197 ((hammer2_tid_t *)fhp->fid_data)[0] = ip->meta.inum;
2198 ((hammer2_tid_t *)fhp->fid_data)[1] = 0;
2205 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
2206 struct fid *fhp, struct vnode **vpp)
2213 inum = ((hammer2_tid_t *)fhp->fid_data)[0] & HAMMER2_DIRHASH_USERMSK;
2216 error = hammer2_vfs_root(mp, vpp);
2218 error = hammer2_vfs_vget(mp, NULL, inum, vpp);
2223 kprintf("fhtovp: %016jx -> %p, %d\n", inum, *vpp, error);
2229 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
2230 int *exflagsp, struct ucred **credanonp)
2237 np = vfs_export_lookup(mp, &pmp->export, nam);
2239 *exflagsp = np->netc_exflags;
2240 *credanonp = &np->netc_anon;
2249 * Support code for hammer2_vfs_mount(). Read, verify, and install the volume
2250 * header into the HMP
2252 * XXX read four volhdrs and use the one with the highest TID whos CRC
2257 * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to
2258 * nonexistant locations.
2260 * XXX Record selected volhdr and ring updates to each of 4 volhdrs
2264 hammer2_install_volume_header(hammer2_dev_t *hmp)
2266 hammer2_volume_data_t *vd;
2268 hammer2_crc32_t crc0, crc, bcrc0, bcrc;
2280 * There are up to 4 copies of the volume header (syncs iterate
2281 * between them so there is no single master). We don't trust the
2282 * volu_size field so we don't know precisely how large the filesystem
2283 * is, so depend on the OS to return an error if we go beyond the
2284 * block device's EOF.
2286 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
2287 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64,
2288 HAMMER2_VOLUME_BYTES, &bp);
2295 vd = (struct hammer2_volume_data *) bp->b_data;
2296 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) &&
2297 (vd->magic != HAMMER2_VOLUME_ID_ABO)) {
2303 if (vd->magic == HAMMER2_VOLUME_ID_ABO) {
2304 /* XXX: Reversed-endianness filesystem */
2305 kprintf("hammer2: reverse-endian filesystem detected");
2311 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0];
2312 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF,
2313 HAMMER2_VOLUME_ICRC0_SIZE);
2314 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1];
2315 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF,
2316 HAMMER2_VOLUME_ICRC1_SIZE);
2317 if ((crc0 != crc) || (bcrc0 != bcrc)) {
2318 kprintf("hammer2 volume header crc "
2319 "mismatch copy #%d %08x/%08x\n",
2326 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) {
2335 hmp->volsync = hmp->voldata;
2337 if (error_reported || bootverbose || 1) { /* 1/DEBUG */
2338 kprintf("hammer2: using volume header #%d\n",
2343 kprintf("hammer2: no valid volume headers found!\n");
2349 * This handles hysteresis on regular file flushes. Because the BIOs are
2350 * routed to a thread it is possible for an excessive number to build up
2351 * and cause long front-end stalls long before the runningbuffspace limit
2352 * is hit, so we implement hammer2_flush_pipe to control the
2355 * This is a particular problem when compression is used.
2358 hammer2_lwinprog_ref(hammer2_pfs_t *pmp)
2360 atomic_add_int(&pmp->count_lwinprog, 1);
2364 hammer2_lwinprog_drop(hammer2_pfs_t *pmp)
2368 lwinprog = atomic_fetchadd_int(&pmp->count_lwinprog, -1);
2369 if ((lwinprog & HAMMER2_LWINPROG_WAITING) &&
2370 (lwinprog & HAMMER2_LWINPROG_MASK) <= hammer2_flush_pipe * 2 / 3) {
2371 atomic_clear_int(&pmp->count_lwinprog,
2372 HAMMER2_LWINPROG_WAITING);
2373 wakeup(&pmp->count_lwinprog);
2375 if ((lwinprog & HAMMER2_LWINPROG_WAITING0) &&
2376 (lwinprog & HAMMER2_LWINPROG_MASK) <= 0) {
2377 atomic_clear_int(&pmp->count_lwinprog,
2378 HAMMER2_LWINPROG_WAITING0);
2379 wakeup(&pmp->count_lwinprog);
2384 hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int flush_pipe)
2387 int lwflag = (flush_pipe) ? HAMMER2_LWINPROG_WAITING :
2388 HAMMER2_LWINPROG_WAITING0;
2391 lwinprog = pmp->count_lwinprog;
2393 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2395 tsleep_interlock(&pmp->count_lwinprog, 0);
2396 atomic_set_int(&pmp->count_lwinprog, lwflag);
2397 lwinprog = pmp->count_lwinprog;
2398 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2400 tsleep(&pmp->count_lwinprog, PINTERLOCKED, "h2wpipe", hz);
2405 * Manage excessive memory resource use for chain and related
2409 hammer2_pfs_memory_wait(hammer2_pfs_t *pmp)
2419 * Atomic check condition and wait. Also do an early speedup of
2420 * the syncer to try to avoid hitting the wait.
2423 waiting = pmp->inmem_dirty_chains;
2425 count = waiting & HAMMER2_DIRTYCHAIN_MASK;
2427 limit = pmp->mp->mnt_nvnodelistsize / 10;
2428 if (limit < hammer2_limit_dirty_chains)
2429 limit = hammer2_limit_dirty_chains;
2434 if ((int)(ticks - zzticks) > hz) {
2436 kprintf("count %ld %ld\n", count, limit);
2441 * Block if there are too many dirty chains present, wait
2442 * for the flush to clean some out.
2444 if (count > limit) {
2445 tsleep_interlock(&pmp->inmem_dirty_chains, 0);
2446 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2448 waiting | HAMMER2_DIRTYCHAIN_WAITING)) {
2449 speedup_syncer(pmp->mp);
2450 tsleep(&pmp->inmem_dirty_chains, PINTERLOCKED,
2453 continue; /* loop on success or fail */
2457 * Try to start an early flush before we are forced to block.
2459 if (count > limit * 7 / 10)
2460 speedup_syncer(pmp->mp);
2466 hammer2_pfs_memory_inc(hammer2_pfs_t *pmp)
2469 atomic_add_int(&pmp->inmem_dirty_chains, 1);
2474 hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp)
2482 waiting = pmp->inmem_dirty_chains;
2484 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2487 ~HAMMER2_DIRTYCHAIN_WAITING)) {
2492 if (waiting & HAMMER2_DIRTYCHAIN_WAITING)
2493 wakeup(&pmp->inmem_dirty_chains);
2500 hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx)
2502 hammer2_chain_t *scan;
2503 hammer2_chain_t *parent;
2507 kprintf("%*.*s...\n", tab, tab, "");
2512 kprintf("%*.*s%c-chain %p.%d %016jx/%d mir=%016jx\n",
2514 chain, chain->bref.type,
2515 chain->bref.key, chain->bref.keybits,
2516 chain->bref.mirror_tid);
2518 kprintf("%*.*s [%08x] (%s) refs=%d",
2521 ((chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
2522 chain->data) ? (char *)chain->data->ipdata.filename : "?"),
2525 parent = chain->parent;
2527 kprintf("\n%*.*s p=%p [pflags %08x prefs %d",
2529 parent, parent->flags, parent->refs);
2530 if (RB_EMPTY(&chain->core.rbtree)) {
2534 RB_FOREACH(scan, hammer2_chain_tree, &chain->core.rbtree)
2535 hammer2_dump_chain(scan, tab + 4, countp, 'a');
2536 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && chain->data)
2537 kprintf("%*.*s}(%s)\n", tab, tab, "",
2538 chain->data->ipdata.filename);
2540 kprintf("%*.*s}\n", tab, tab, "");