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 static struct hammer2_mntlist hammer2_mntlist;
77 struct hammer2_pfslist hammer2_pfslist;
78 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_always_compress = 0; /* always try to compress */
85 int hammer2_inval_enable = 0;
86 int hammer2_flush_pipe = 100;
87 int hammer2_synchronous_flush = 1;
88 int hammer2_dio_count;
89 int hammer2_limit_dio = 256;
90 long hammer2_chain_allocs;
91 long hammer2_chain_frees;
92 long hammer2_limit_dirty_chains;
93 long hammer2_count_modified_chains;
94 long hammer2_iod_invals;
95 long hammer2_iod_file_read;
96 long hammer2_iod_meta_read;
97 long hammer2_iod_indr_read;
98 long hammer2_iod_fmap_read;
99 long hammer2_iod_volu_read;
100 long hammer2_iod_file_write;
101 long hammer2_iod_file_wembed;
102 long hammer2_iod_file_wzero;
103 long hammer2_iod_file_wdedup;
104 long hammer2_iod_meta_write;
105 long hammer2_iod_indr_write;
106 long hammer2_iod_fmap_write;
107 long hammer2_iod_volu_write;
109 MALLOC_DECLARE(M_HAMMER2_CBUFFER);
110 MALLOC_DEFINE(M_HAMMER2_CBUFFER, "HAMMER2-compbuffer",
111 "Buffer used for compression.");
113 MALLOC_DECLARE(M_HAMMER2_DEBUFFER);
114 MALLOC_DEFINE(M_HAMMER2_DEBUFFER, "HAMMER2-decompbuffer",
115 "Buffer used for decompression.");
117 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem");
119 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW,
120 &hammer2_debug, 0, "");
121 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_read, CTLFLAG_RW,
122 &hammer2_cluster_read, 0, "");
123 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_write, CTLFLAG_RW,
124 &hammer2_cluster_write, 0, "");
125 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dedup_enable, CTLFLAG_RW,
126 &hammer2_dedup_enable, 0, "");
127 SYSCTL_INT(_vfs_hammer2, OID_AUTO, always_compress, CTLFLAG_RW,
128 &hammer2_always_compress, 0, "");
129 SYSCTL_INT(_vfs_hammer2, OID_AUTO, inval_enable, CTLFLAG_RW,
130 &hammer2_inval_enable, 0, "");
131 SYSCTL_INT(_vfs_hammer2, OID_AUTO, flush_pipe, CTLFLAG_RW,
132 &hammer2_flush_pipe, 0, "");
133 SYSCTL_INT(_vfs_hammer2, OID_AUTO, synchronous_flush, CTLFLAG_RW,
134 &hammer2_synchronous_flush, 0, "");
135 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_allocs, CTLFLAG_RW,
136 &hammer2_chain_allocs, 0, "");
137 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_frees, CTLFLAG_RW,
138 &hammer2_chain_frees, 0, "");
139 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_dirty_chains, CTLFLAG_RW,
140 &hammer2_limit_dirty_chains, 0, "");
141 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, count_modified_chains, CTLFLAG_RW,
142 &hammer2_count_modified_chains, 0, "");
143 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dio_count, CTLFLAG_RD,
144 &hammer2_dio_count, 0, "");
145 SYSCTL_INT(_vfs_hammer2, OID_AUTO, limit_dio, CTLFLAG_RW,
146 &hammer2_limit_dio, 0, "");
148 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_invals, CTLFLAG_RW,
149 &hammer2_iod_invals, 0, "");
150 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RW,
151 &hammer2_iod_file_read, 0, "");
152 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RW,
153 &hammer2_iod_meta_read, 0, "");
154 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RW,
155 &hammer2_iod_indr_read, 0, "");
156 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_read, CTLFLAG_RW,
157 &hammer2_iod_fmap_read, 0, "");
158 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_read, CTLFLAG_RW,
159 &hammer2_iod_volu_read, 0, "");
161 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RW,
162 &hammer2_iod_file_write, 0, "");
163 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wembed, CTLFLAG_RW,
164 &hammer2_iod_file_wembed, 0, "");
165 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wzero, CTLFLAG_RW,
166 &hammer2_iod_file_wzero, 0, "");
167 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wdedup, CTLFLAG_RW,
168 &hammer2_iod_file_wdedup, 0, "");
169 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RW,
170 &hammer2_iod_meta_write, 0, "");
171 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RW,
172 &hammer2_iod_indr_write, 0, "");
173 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_write, CTLFLAG_RW,
174 &hammer2_iod_fmap_write, 0, "");
175 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RW,
176 &hammer2_iod_volu_write, 0, "");
178 long hammer2_check_icrc32;
179 long hammer2_check_xxhash64;
180 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_icrc32, CTLFLAG_RW,
181 &hammer2_check_icrc32, 0, "");
182 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_xxhash64, CTLFLAG_RW,
183 &hammer2_check_xxhash64, 0, "");
185 static int hammer2_vfs_init(struct vfsconf *conf);
186 static int hammer2_vfs_uninit(struct vfsconf *vfsp);
187 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
189 static int hammer2_remount(hammer2_dev_t *, struct mount *, char *,
190 struct vnode *, struct ucred *);
191 static int hammer2_recovery(hammer2_dev_t *hmp);
192 static int hammer2_vfs_unmount(struct mount *mp, int mntflags);
193 static int hammer2_vfs_root(struct mount *mp, struct vnode **vpp);
194 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp,
196 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
198 static int hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
199 struct fid *fhp, struct vnode **vpp);
200 static int hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp);
201 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
202 int *exflagsp, struct ucred **credanonp);
204 static int hammer2_install_volume_header(hammer2_dev_t *hmp);
205 static int hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
207 static void hammer2_update_pmps(hammer2_dev_t *hmp);
209 static void hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp);
210 static void hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp,
214 * HAMMER2 vfs operations.
216 static struct vfsops hammer2_vfsops = {
217 .vfs_init = hammer2_vfs_init,
218 .vfs_uninit = hammer2_vfs_uninit,
219 .vfs_sync = hammer2_vfs_sync,
220 .vfs_mount = hammer2_vfs_mount,
221 .vfs_unmount = hammer2_vfs_unmount,
222 .vfs_root = hammer2_vfs_root,
223 .vfs_statfs = hammer2_vfs_statfs,
224 .vfs_statvfs = hammer2_vfs_statvfs,
225 .vfs_vget = hammer2_vfs_vget,
226 .vfs_vptofh = hammer2_vfs_vptofh,
227 .vfs_fhtovp = hammer2_vfs_fhtovp,
228 .vfs_checkexp = hammer2_vfs_checkexp
231 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", "");
233 VFS_SET(hammer2_vfsops, hammer2, VFCF_MPSAFE);
234 MODULE_VERSION(hammer2, 1);
238 hammer2_vfs_init(struct vfsconf *conf)
240 static struct objcache_malloc_args margs_read;
241 static struct objcache_malloc_args margs_write;
242 static struct objcache_malloc_args margs_vop;
249 * A large DIO cache is needed to retain dedup enablement masks.
250 * The bulkfree code clears related masks as part of the disk block
251 * recycling algorithm, preventing it from being used for a later
254 * NOTE: A large buffer cache can actually interfere with dedup
255 * operation because we dedup based on media physical buffers
256 * and not logical buffers. Try to make the DIO chace large
257 * enough to avoid this problem, but also cap it.
259 hammer2_limit_dio = nbuf * 2;
260 if (hammer2_limit_dio > 100000)
261 hammer2_limit_dio = 100000;
263 if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref))
265 if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data))
267 if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data))
271 kprintf("HAMMER2 structure size mismatch; cannot continue.\n");
273 margs_read.objsize = 65536;
274 margs_read.mtype = M_HAMMER2_DEBUFFER;
276 margs_write.objsize = 32768;
277 margs_write.mtype = M_HAMMER2_CBUFFER;
279 margs_vop.objsize = sizeof(hammer2_xop_t);
280 margs_vop.mtype = M_HAMMER2;
283 * Note thaht for the XOPS cache we want backing store allocations
284 * to use M_ZERO. This is not allowed in objcache_get() (to avoid
285 * confusion), so use the backing store function that does it. This
286 * means that initial XOPS objects are zerod but REUSED objects are
287 * not. So we are responsible for cleaning the object up sufficiently
288 * for our needs before objcache_put()ing it back (typically just the
291 cache_buffer_read = objcache_create(margs_read.mtype->ks_shortdesc,
292 0, 1, NULL, NULL, NULL,
293 objcache_malloc_alloc,
294 objcache_malloc_free,
296 cache_buffer_write = objcache_create(margs_write.mtype->ks_shortdesc,
297 0, 1, NULL, NULL, NULL,
298 objcache_malloc_alloc,
299 objcache_malloc_free,
301 cache_xops = objcache_create(margs_vop.mtype->ks_shortdesc,
302 0, 1, NULL, NULL, NULL,
303 objcache_malloc_alloc_zero,
304 objcache_malloc_free,
308 lockinit(&hammer2_mntlk, "mntlk", 0, 0);
309 TAILQ_INIT(&hammer2_mntlist);
310 TAILQ_INIT(&hammer2_pfslist);
312 hammer2_limit_dirty_chains = maxvnodes / 10;
313 if (hammer2_limit_dirty_chains > HAMMER2_LIMIT_DIRTY_CHAINS)
314 hammer2_limit_dirty_chains = HAMMER2_LIMIT_DIRTY_CHAINS;
321 hammer2_vfs_uninit(struct vfsconf *vfsp __unused)
323 objcache_destroy(cache_buffer_read);
324 objcache_destroy(cache_buffer_write);
325 objcache_destroy(cache_xops);
330 * Core PFS allocator. Used to allocate or reference the pmp structure
331 * for PFS cluster mounts and the spmp structure for media (hmp) structures.
332 * The pmp can be passed in or loaded by this function using the chain and
335 * pmp->modify_tid tracks new modify_tid transaction ids for front-end
336 * transactions. Note that synchronization does not use this field.
337 * (typically frontend operations and synchronization cannot run on the
338 * same PFS node at the same time).
343 hammer2_pfsalloc(hammer2_chain_t *chain,
344 const hammer2_inode_data_t *ripdata,
345 hammer2_tid_t modify_tid, hammer2_dev_t *force_local)
348 hammer2_inode_t *iroot;
356 * Locate or create the PFS based on the cluster id. If ripdata
357 * is NULL this is a spmp which is unique and is always allocated.
359 * If the device is mounted in local mode all PFSs are considered
360 * independent and not part of any cluster (for debugging only).
363 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
364 if (force_local != pmp->force_local)
366 if (force_local == NULL &&
367 bcmp(&pmp->pfs_clid, &ripdata->meta.pfs_clid,
368 sizeof(pmp->pfs_clid)) == 0) {
370 } else if (force_local && pmp->pfs_names[0] &&
371 strcmp(pmp->pfs_names[0], ripdata->filename) == 0) {
378 pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO);
379 pmp->force_local = force_local;
380 hammer2_trans_manage_init(pmp);
381 kmalloc_create(&pmp->minode, "HAMMER2-inodes");
382 kmalloc_create(&pmp->mmsg, "HAMMER2-pfsmsg");
383 lockinit(&pmp->lock, "pfslk", 0, 0);
384 lockinit(&pmp->lock_nlink, "h2nlink", 0, 0);
385 spin_init(&pmp->inum_spin, "hm2pfsalloc_inum");
386 spin_init(&pmp->xop_spin, "h2xop");
387 spin_init(&pmp->lru_spin, "h2lru");
388 RB_INIT(&pmp->inum_tree);
389 TAILQ_INIT(&pmp->sideq);
390 TAILQ_INIT(&pmp->lru_list);
391 spin_init(&pmp->list_spin, "hm2pfsalloc_list");
394 * Distribute backend operations to threads
396 for (i = 0; i < HAMMER2_XOPGROUPS; ++i)
397 hammer2_xop_group_init(pmp, &pmp->xop_groups[i]);
400 * Save the last media transaction id for the flusher. Set
404 pmp->pfs_clid = ripdata->meta.pfs_clid;
405 TAILQ_INSERT_TAIL(&hammer2_pfslist, pmp, mntentry);
408 * The synchronization thread may start too early, make
409 * sure it stays frozen until we are ready to let it go.
413 pmp->primary_thr.flags = HAMMER2_THREAD_FROZEN |
414 HAMMER2_THREAD_REMASTER;
419 * Create the PFS's root inode and any missing XOP helper threads.
421 if ((iroot = pmp->iroot) == NULL) {
422 iroot = hammer2_inode_get(pmp, NULL, NULL, -1);
424 iroot->meta = ripdata->meta;
426 hammer2_inode_ref(iroot);
427 hammer2_inode_unlock(iroot);
431 * Stop here if no chain is passed in.
437 * When a chain is passed in we must add it to the PFS's root
438 * inode, update pmp->pfs_types[], and update the syncronization
441 * When forcing local mode, mark the PFS as a MASTER regardless.
443 * At the moment empty spots can develop due to removals or failures.
444 * Ultimately we want to re-fill these spots but doing so might
445 * confused running code. XXX
447 hammer2_inode_ref(iroot);
448 hammer2_mtx_ex(&iroot->lock);
449 j = iroot->cluster.nchains;
451 kprintf("add PFS to pmp %p[%d]\n", pmp, j);
453 if (j == HAMMER2_MAXCLUSTER) {
454 kprintf("hammer2_mount: cluster full!\n");
455 /* XXX fatal error? */
457 KKASSERT(chain->pmp == NULL);
459 hammer2_chain_ref(chain);
460 iroot->cluster.array[j].chain = chain;
462 pmp->pfs_types[j] = HAMMER2_PFSTYPE_MASTER;
464 pmp->pfs_types[j] = ripdata->meta.pfs_type;
465 pmp->pfs_names[j] = kstrdup(ripdata->filename, M_HAMMER2);
466 pmp->pfs_hmps[j] = chain->hmp;
469 * If the PFS is already mounted we must account
470 * for the mount_count here.
473 ++chain->hmp->mount_count;
476 * May have to fixup dirty chain tracking. Previous
477 * pmp was NULL so nothing to undo.
479 if (chain->flags & HAMMER2_CHAIN_MODIFIED)
480 hammer2_pfs_memory_inc(pmp);
483 iroot->cluster.nchains = j;
486 * Update nmasters from any PFS inode which is part of the cluster.
487 * It is possible that this will result in a value which is too
488 * high. MASTER PFSs are authoritative for pfs_nmasters and will
489 * override this value later on.
491 * (This informs us of masters that might not currently be
492 * discoverable by this mount).
494 if (ripdata && pmp->pfs_nmasters < ripdata->meta.pfs_nmasters) {
495 pmp->pfs_nmasters = ripdata->meta.pfs_nmasters;
499 * Count visible masters. Masters are usually added with
500 * ripdata->meta.pfs_nmasters set to 1. This detects when there
501 * are more (XXX and must update the master inodes).
504 for (i = 0; i < iroot->cluster.nchains; ++i) {
505 if (pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER)
508 if (pmp->pfs_nmasters < count)
509 pmp->pfs_nmasters = count;
512 * Create missing synchronization and support threads.
514 * Single-node masters (including snapshots) have nothing to
515 * synchronize and do not require this thread.
517 * Multi-node masters or any number of soft masters, slaves, copy,
518 * or other PFS types need the thread.
520 * Each thread is responsible for its particular cluster index.
521 * We use independent threads so stalls or mismatches related to
522 * any given target do not affect other targets.
524 for (i = 0; i < iroot->cluster.nchains; ++i) {
526 * Single-node masters (including snapshots) have nothing
527 * to synchronize and will make direct xops support calls,
528 * thus they do not require this thread.
530 * Note that there can be thousands of snapshots. We do not
531 * want to create thousands of threads.
533 if (pmp->pfs_nmasters <= 1 &&
534 pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) {
539 * Sync support thread
541 if (pmp->sync_thrs[i].td == NULL) {
542 hammer2_thr_create(&pmp->sync_thrs[i], pmp, NULL,
544 hammer2_primary_sync_thread);
549 * Create missing Xop threads
551 * NOTE: We create helper threads for all mounted PFSs or any
552 * PFSs with 2+ nodes (so the sync thread can update them,
553 * even if not mounted).
555 if (pmp->mp || iroot->cluster.nchains >= 2)
556 hammer2_xop_helper_create(pmp);
558 hammer2_mtx_unlock(&iroot->lock);
559 hammer2_inode_drop(iroot);
565 * Deallocate an element of a probed PFS. If destroying and this is a
566 * MASTER, adjust nmasters.
568 * This function does not physically destroy the PFS element in its device
569 * under the super-root (see hammer2_ioctl_pfs_delete()).
572 hammer2_pfsdealloc(hammer2_pfs_t *pmp, int clindex, int destroying)
574 hammer2_inode_t *iroot;
575 hammer2_chain_t *chain;
579 * Cleanup our reference on iroot. iroot is (should) not be needed
587 * XXX flush after acquiring the iroot lock.
588 * XXX clean out the cluster index from all inode structures.
590 hammer2_thr_delete(&pmp->sync_thrs[clindex]);
593 * Remove the cluster index from the group. If destroying
594 * the PFS and this is a master, adjust pfs_nmasters.
596 hammer2_mtx_ex(&iroot->lock);
597 chain = iroot->cluster.array[clindex].chain;
598 iroot->cluster.array[clindex].chain = NULL;
600 switch(pmp->pfs_types[clindex]) {
601 case HAMMER2_PFSTYPE_MASTER:
602 if (destroying && pmp->pfs_nmasters > 0)
604 /* XXX adjust ripdata->meta.pfs_nmasters */
609 pmp->pfs_types[clindex] = HAMMER2_PFSTYPE_NONE;
611 hammer2_mtx_unlock(&iroot->lock);
617 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
618 hammer2_chain_drop(chain);
622 * Terminate all XOP threads for the cluster index.
624 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
625 hammer2_thr_delete(&pmp->xop_groups[j].thrs[clindex]);
630 * Destroy a PFS, typically only occurs after the last mount on a device
634 hammer2_pfsfree(hammer2_pfs_t *pmp)
636 hammer2_inode_t *iroot;
637 hammer2_chain_t *chain;
642 * Cleanup our reference on iroot. iroot is (should) not be needed
645 TAILQ_REMOVE(&hammer2_pfslist, pmp, mntentry);
649 for (i = 0; i < iroot->cluster.nchains; ++i) {
650 hammer2_thr_delete(&pmp->sync_thrs[i]);
651 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
652 hammer2_thr_delete(&pmp->xop_groups[j].thrs[i]);
654 #if REPORT_REFS_ERRORS
655 if (pmp->iroot->refs != 1)
656 kprintf("PMP->IROOT %p REFS WRONG %d\n",
657 pmp->iroot, pmp->iroot->refs);
659 KKASSERT(pmp->iroot->refs == 1);
661 /* ref for pmp->iroot */
662 hammer2_inode_drop(pmp->iroot);
667 * Cleanup chains remaining on LRU list.
669 kprintf("pfsfree: %p lrucount=%d\n", pmp, pmp->lru_count);
670 while ((chain = TAILQ_FIRST(&pmp->lru_list)) != NULL) {
671 hammer2_chain_ref(chain);
672 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
673 hammer2_chain_drop(chain);
677 * Free remaining pmp resources
679 kmalloc_destroy(&pmp->mmsg);
680 kmalloc_destroy(&pmp->minode);
682 kfree(pmp, M_HAMMER2);
686 * Remove all references to hmp from the pfs list. Any PFS which becomes
687 * empty is terminated and freed.
692 hammer2_pfsfree_scan(hammer2_dev_t *hmp)
695 hammer2_inode_t *iroot;
696 hammer2_chain_t *rchain;
702 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
703 if ((iroot = pmp->iroot) == NULL)
705 if (hmp->spmp == pmp) {
706 kprintf("unmount hmp %p remove spmp %p\n",
712 * Determine if this PFS is affected. If it is we must
713 * freeze all management threads and lock its iroot.
715 * Freezing a management thread forces it idle, operations
716 * in-progress will be aborted and it will have to start
717 * over again when unfrozen, or exit if told to exit.
719 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
720 if (pmp->pfs_hmps[i] == hmp)
723 if (i != HAMMER2_MAXCLUSTER) {
725 * Make sure all synchronization threads are locked
728 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
729 if (pmp->pfs_hmps[i] == NULL)
731 hammer2_thr_freeze_async(&pmp->sync_thrs[i]);
732 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
733 hammer2_thr_freeze_async(
734 &pmp->xop_groups[j].thrs[i]);
737 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
738 if (pmp->pfs_hmps[i] == NULL)
740 hammer2_thr_freeze(&pmp->sync_thrs[i]);
741 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
743 &pmp->xop_groups[j].thrs[i]);
748 * Lock the inode and clean out matching chains.
749 * Note that we cannot use hammer2_inode_lock_*()
750 * here because that would attempt to validate the
751 * cluster that we are in the middle of ripping
754 * WARNING! We are working directly on the inodes
757 hammer2_mtx_ex(&iroot->lock);
760 * Remove the chain from matching elements of the PFS.
762 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
763 if (pmp->pfs_hmps[i] != hmp)
765 hammer2_thr_delete(&pmp->sync_thrs[i]);
766 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
768 &pmp->xop_groups[j].thrs[i]);
770 rchain = iroot->cluster.array[i].chain;
771 iroot->cluster.array[i].chain = NULL;
772 pmp->pfs_types[i] = 0;
773 if (pmp->pfs_names[i]) {
774 kfree(pmp->pfs_names[i], M_HAMMER2);
775 pmp->pfs_names[i] = NULL;
778 hammer2_chain_drop(rchain);
780 if (iroot->cluster.focus == rchain)
781 iroot->cluster.focus = NULL;
783 pmp->pfs_hmps[i] = NULL;
785 hammer2_mtx_unlock(&iroot->lock);
786 didfreeze = 1; /* remaster, unfreeze down below */
792 * Cleanup trailing chains. Gaps may remain.
794 for (i = HAMMER2_MAXCLUSTER - 1; i >= 0; --i) {
795 if (pmp->pfs_hmps[i])
798 iroot->cluster.nchains = i + 1;
801 * If the PMP has no elements remaining we can destroy it.
802 * (this will transition management threads from frozen->exit).
804 if (iroot->cluster.nchains == 0) {
805 kprintf("unmount hmp %p last ref to PMP=%p\n",
807 hammer2_pfsfree(pmp);
812 * If elements still remain we need to set the REMASTER
813 * flag and unfreeze it.
816 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
817 if (pmp->pfs_hmps[i] == NULL)
819 hammer2_thr_remaster(&pmp->sync_thrs[i]);
820 hammer2_thr_unfreeze(&pmp->sync_thrs[i]);
821 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
822 hammer2_thr_remaster(
823 &pmp->xop_groups[j].thrs[i]);
824 hammer2_thr_unfreeze(
825 &pmp->xop_groups[j].thrs[i]);
833 * Mount or remount HAMMER2 fileystem from physical media
836 * mp mount point structure
842 * mp mount point structure
843 * path path to mount point
844 * data pointer to argument structure in user space
845 * volume volume path (device@LABEL form)
846 * hflags user mount flags
847 * cred user credentials
854 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
857 struct hammer2_mount_info info;
861 hammer2_dev_t *force_local;
862 hammer2_key_t key_next;
863 hammer2_key_t key_dummy;
866 struct nlookupdata nd;
867 hammer2_chain_t *parent;
868 hammer2_chain_t *chain;
869 hammer2_cluster_t *cluster;
870 const hammer2_inode_data_t *ripdata;
871 hammer2_blockref_t bref;
873 char devstr[MNAMELEN];
888 kprintf("hammer2_mount\n");
894 bzero(&info, sizeof(info));
895 info.cluster_fd = -1;
896 ksnprintf(devstr, sizeof(devstr), "%s",
897 mp->mnt_stat.f_mntfromname);
898 kprintf("hammer2_mount: root '%s'\n", devstr);
901 * Non-root mount or updating a mount
903 error = copyin(data, &info, sizeof(info));
907 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done);
913 * Extract device and label, automatically mount @BOOT, @ROOT, or @DATA
914 * if no label specified, based on the partition id. Error out if no
915 * partition id. This is strictly a convenience to match the
916 * default label created by newfs_hammer2, our preference is
917 * that a label always be specified.
920 label = strchr(devstr, '@');
921 if (label && ((label + 1) - dev) > done)
923 if (label && label == devstr)
925 if (label == NULL || label[1] == 0) {
929 label = devstr + strlen(devstr);
947 kprintf("hammer2_mount: dev=\"%s\" label=\"%s\" rdonly=%d\n",
948 dev, label, (mp->mnt_flag & MNT_RDONLY));
950 if (mp->mnt_flag & MNT_UPDATE) {
952 * Update mount. Note that pmp->iroot->cluster is
953 * an inode-embedded cluster and thus cannot be
956 * XXX HAMMER2 needs to implement NFS export via
960 pmp->hflags = info.hflags;
961 cluster = &pmp->iroot->cluster;
962 for (i = 0; i < cluster->nchains; ++i) {
963 if (cluster->array[i].chain == NULL)
965 hmp = cluster->array[i].chain->hmp;
967 error = hammer2_remount(hmp, mp, path,
979 * If a path is specified and dev is not an empty string, lookup the
980 * name and verify that it referes to a block device.
982 * If a path is specified and dev is an empty string we fall through
983 * and locate the label in the hmp search.
985 if (path && *dev != 0) {
986 error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW);
988 error = nlookup(&nd);
990 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
992 } else if (path == NULL) {
994 cdev_t cdev = kgetdiskbyname(dev);
995 error = bdevvp(cdev, &devvp);
997 kprintf("hammer2: cannot find '%s'\n", dev);
1000 * We will locate the hmp using the label in the hmp loop.
1006 * Make sure its a block device. Do not check to see if it is
1007 * already mounted until we determine that its a fresh H2 device.
1009 if (error == 0 && devvp) {
1010 vn_isdisk(devvp, &error);
1014 * Determine if the device has already been mounted. After this
1015 * check hmp will be non-NULL if we are doing the second or more
1016 * hammer2 mounts from the same device.
1018 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
1021 * Match the device. Due to the way devfs works,
1022 * we may not be able to directly match the vnode pointer,
1023 * so also check to see if the underlying device matches.
1025 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1026 if (hmp->devvp == devvp)
1028 if (devvp->v_rdev &&
1029 hmp->devvp->v_rdev == devvp->v_rdev) {
1035 * If no match this may be a fresh H2 mount, make sure
1036 * the device is not mounted on anything else.
1039 error = vfs_mountedon(devvp);
1040 } else if (error == 0) {
1042 * Match the label to a pmp already probed.
1044 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
1045 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
1046 if (pmp->pfs_names[i] &&
1047 strcmp(pmp->pfs_names[i], label) == 0) {
1048 hmp = pmp->pfs_hmps[i];
1060 * Open the device if this isn't a secondary mount and construct
1061 * the H2 device mount (hmp).
1064 hammer2_chain_t *schain;
1067 if (error == 0 && vcount(devvp) > 0) {
1068 kprintf("Primary device already has references\n");
1073 * Now open the device
1076 ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
1077 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1078 error = vinvalbuf(devvp, V_SAVE, 0, 0);
1080 error = VOP_OPEN(devvp,
1081 (ronly ? FREAD : FREAD | FWRITE),
1086 if (error && devvp) {
1091 lockmgr(&hammer2_mntlk, LK_RELEASE);
1094 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO);
1095 ksnprintf(hmp->devrepname, sizeof(hmp->devrepname), "%s", dev);
1098 hmp->hflags = info.hflags & HMNT2_DEVFLAGS;
1099 kmalloc_create(&hmp->mchain, "HAMMER2-chains");
1100 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry);
1101 RB_INIT(&hmp->iotree);
1102 spin_init(&hmp->io_spin, "hm2mount_io");
1103 spin_init(&hmp->list_spin, "hm2mount_list");
1104 TAILQ_INIT(&hmp->flushq);
1106 lockinit(&hmp->vollk, "h2vol", 0, 0);
1107 lockinit(&hmp->bulklk, "h2bulk", 0, 0);
1108 lockinit(&hmp->bflock, "h2bflk", 0, 0);
1111 * vchain setup. vchain.data is embedded.
1112 * vchain.refs is initialized and will never drop to 0.
1114 * NOTE! voldata is not yet loaded.
1116 hmp->vchain.hmp = hmp;
1117 hmp->vchain.refs = 1;
1118 hmp->vchain.data = (void *)&hmp->voldata;
1119 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME;
1120 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
1121 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1123 hammer2_chain_core_init(&hmp->vchain);
1124 /* hmp->vchain.u.xxx is left NULL */
1127 * fchain setup. fchain.data is embedded.
1128 * fchain.refs is initialized and will never drop to 0.
1130 * The data is not used but needs to be initialized to
1131 * pass assertion muster. We use this chain primarily
1132 * as a placeholder for the freemap's top-level RBTREE
1133 * so it does not interfere with the volume's topology
1136 hmp->fchain.hmp = hmp;
1137 hmp->fchain.refs = 1;
1138 hmp->fchain.data = (void *)&hmp->voldata.freemap_blockset;
1139 hmp->fchain.bref.type = HAMMER2_BREF_TYPE_FREEMAP;
1140 hmp->fchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
1141 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1142 hmp->fchain.bref.methods =
1143 HAMMER2_ENC_CHECK(HAMMER2_CHECK_FREEMAP) |
1144 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE);
1146 hammer2_chain_core_init(&hmp->fchain);
1147 /* hmp->fchain.u.xxx is left NULL */
1150 * Install the volume header and initialize fields from
1153 error = hammer2_install_volume_header(hmp);
1155 hammer2_unmount_helper(mp, NULL, hmp);
1156 lockmgr(&hammer2_mntlk, LK_RELEASE);
1157 hammer2_vfs_unmount(mp, MNT_FORCE);
1162 * Really important to get these right or flush will get
1165 hmp->spmp = hammer2_pfsalloc(NULL, NULL, 0, NULL);
1166 kprintf("alloc spmp %p tid %016jx\n",
1167 hmp->spmp, hmp->voldata.mirror_tid);
1171 * Dummy-up vchain and fchain's modify_tid. mirror_tid
1172 * is inherited from the volume header.
1175 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1176 hmp->vchain.bref.modify_tid = hmp->vchain.bref.mirror_tid;
1177 hmp->vchain.pmp = spmp;
1178 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1179 hmp->fchain.bref.modify_tid = hmp->fchain.bref.mirror_tid;
1180 hmp->fchain.pmp = spmp;
1183 * First locate the super-root inode, which is key 0
1184 * relative to the volume header's blockset.
1186 * Then locate the root inode by scanning the directory keyspace
1187 * represented by the label.
1189 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
1190 schain = hammer2_chain_lookup(&parent, &key_dummy,
1191 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY,
1193 hammer2_chain_lookup_done(parent);
1194 if (schain == NULL) {
1195 kprintf("hammer2_mount: invalid super-root\n");
1196 hammer2_unmount_helper(mp, NULL, hmp);
1197 lockmgr(&hammer2_mntlk, LK_RELEASE);
1198 hammer2_vfs_unmount(mp, MNT_FORCE);
1201 if (schain->error) {
1202 kprintf("hammer2_mount: error %s reading super-root\n",
1203 hammer2_error_str(schain->error));
1204 hammer2_chain_unlock(schain);
1205 hammer2_chain_drop(schain);
1207 hammer2_unmount_helper(mp, NULL, hmp);
1208 lockmgr(&hammer2_mntlk, LK_RELEASE);
1209 hammer2_vfs_unmount(mp, MNT_FORCE);
1214 * The super-root always uses an inode_tid of 1 when
1217 spmp->inode_tid = 1;
1218 spmp->modify_tid = schain->bref.modify_tid + 1;
1221 * Sanity-check schain's pmp and finish initialization.
1222 * Any chain belonging to the super-root topology should
1223 * have a NULL pmp (not even set to spmp).
1225 ripdata = &hammer2_chain_rdata(schain)->ipdata;
1226 KKASSERT(schain->pmp == NULL);
1227 spmp->pfs_clid = ripdata->meta.pfs_clid;
1230 * Replace the dummy spmp->iroot with a real one. It's
1231 * easier to just do a wholesale replacement than to try
1232 * to update the chain and fixup the iroot fields.
1234 * The returned inode is locked with the supplied cluster.
1236 cluster = hammer2_cluster_from_chain(schain);
1237 hammer2_inode_drop(spmp->iroot);
1239 spmp->iroot = hammer2_inode_get(spmp, NULL, cluster, -1);
1240 spmp->spmp_hmp = hmp;
1241 spmp->pfs_types[0] = ripdata->meta.pfs_type;
1242 spmp->pfs_hmps[0] = hmp;
1243 hammer2_inode_ref(spmp->iroot);
1244 hammer2_inode_unlock(spmp->iroot);
1245 hammer2_cluster_unlock(cluster);
1246 hammer2_cluster_drop(cluster);
1248 /* leave spmp->iroot with one ref */
1250 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
1251 error = hammer2_recovery(hmp);
1252 /* XXX do something with error */
1254 hammer2_update_pmps(hmp);
1255 hammer2_iocom_init(hmp);
1256 hammer2_bulkfree_init(hmp);
1259 * Ref the cluster management messaging descriptor. The mount
1260 * program deals with the other end of the communications pipe.
1262 * Root mounts typically do not supply one.
1264 if (info.cluster_fd >= 0) {
1265 fp = holdfp(curproc->p_fd, info.cluster_fd, -1);
1267 hammer2_cluster_reconnect(hmp, fp);
1269 kprintf("hammer2_mount: bad cluster_fd!\n");
1274 if (info.hflags & HMNT2_DEVFLAGS) {
1275 kprintf("hammer2: Warning: mount flags pertaining "
1276 "to the whole device may only be specified "
1277 "on the first mount of the device: %08x\n",
1278 info.hflags & HMNT2_DEVFLAGS);
1283 * Force local mount (disassociate all PFSs from their clusters).
1284 * Used primarily for debugging.
1286 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1289 * Lookup the mount point under the media-localized super-root.
1290 * Scanning hammer2_pfslist doesn't help us because it represents
1291 * PFS cluster ids which can aggregate several named PFSs together.
1293 * cluster->pmp will incorrectly point to spmp and must be fixed
1296 hammer2_inode_lock(spmp->iroot, 0);
1297 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1298 lhc = hammer2_dirhash(label, strlen(label));
1299 chain = hammer2_chain_lookup(&parent, &key_next,
1300 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1303 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1304 strcmp(label, chain->data->ipdata.filename) == 0) {
1307 chain = hammer2_chain_next(&parent, chain, &key_next,
1309 lhc + HAMMER2_DIRHASH_LOMASK,
1313 hammer2_chain_unlock(parent);
1314 hammer2_chain_drop(parent);
1316 hammer2_inode_unlock(spmp->iroot);
1319 * PFS could not be found?
1321 if (chain == NULL) {
1323 kprintf("hammer2_mount: PFS label I/O error\n");
1325 kprintf("hammer2_mount: PFS label not found\n");
1326 hammer2_unmount_helper(mp, NULL, hmp);
1327 lockmgr(&hammer2_mntlk, LK_RELEASE);
1328 hammer2_vfs_unmount(mp, MNT_FORCE);
1334 * Acquire the pmp structure (it should have already been allocated
1335 * via hammer2_update_pmps() so do not pass cluster in to add to
1336 * available chains).
1338 * Check if the cluster has already been mounted. A cluster can
1339 * only be mounted once, use null mounts to mount additional copies.
1342 kprintf("hammer2_mount: PFS label I/O error\n");
1344 ripdata = &chain->data->ipdata;
1346 pmp = hammer2_pfsalloc(NULL, ripdata,
1347 bref.modify_tid, force_local);
1349 hammer2_chain_unlock(chain);
1350 hammer2_chain_drop(chain);
1355 kprintf("hammer2_mount hmp=%p pmp=%p\n", hmp, pmp);
1358 kprintf("hammer2_mount: PFS already mounted!\n");
1359 hammer2_unmount_helper(mp, NULL, hmp);
1360 lockmgr(&hammer2_mntlk, LK_RELEASE);
1361 hammer2_vfs_unmount(mp, MNT_FORCE);
1366 pmp->hflags = info.hflags;
1367 mp->mnt_flag |= MNT_LOCAL;
1368 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */
1369 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
1372 * required mount structure initializations
1374 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE;
1375 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE;
1377 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE;
1378 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1383 mp->mnt_iosize_max = MAXPHYS;
1386 * Connect up mount pointers.
1388 hammer2_mount_helper(mp, pmp);
1390 lockmgr(&hammer2_mntlk, LK_RELEASE);
1396 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops);
1397 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops);
1398 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops);
1401 copyinstr(info.volume, mp->mnt_stat.f_mntfromname,
1402 MNAMELEN - 1, &size);
1403 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
1404 } /* else root mount, already in there */
1406 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname));
1408 copyinstr(path, mp->mnt_stat.f_mntonname,
1409 sizeof(mp->mnt_stat.f_mntonname) - 1,
1413 mp->mnt_stat.f_mntonname[0] = '/';
1417 * Initial statfs to prime mnt_stat.
1419 hammer2_vfs_statfs(mp, &mp->mnt_stat, cred);
1425 * Scan PFSs under the super-root and create hammer2_pfs structures.
1429 hammer2_update_pmps(hammer2_dev_t *hmp)
1431 const hammer2_inode_data_t *ripdata;
1432 hammer2_chain_t *parent;
1433 hammer2_chain_t *chain;
1434 hammer2_blockref_t bref;
1435 hammer2_dev_t *force_local;
1436 hammer2_pfs_t *spmp;
1438 hammer2_key_t key_next;
1442 * Force local mount (disassociate all PFSs from their clusters).
1443 * Used primarily for debugging.
1445 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1448 * Lookup mount point under the media-localized super-root.
1450 * cluster->pmp will incorrectly point to spmp and must be fixed
1454 hammer2_inode_lock(spmp->iroot, 0);
1455 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1456 chain = hammer2_chain_lookup(&parent, &key_next,
1457 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX,
1460 if (chain->bref.type != HAMMER2_BREF_TYPE_INODE)
1463 kprintf("I/O error scanning PFS labels\n");
1465 ripdata = &chain->data->ipdata;
1467 kprintf("ADD LOCAL PFS: %s\n", ripdata->filename);
1469 pmp = hammer2_pfsalloc(chain, ripdata,
1470 bref.modify_tid, force_local);
1472 chain = hammer2_chain_next(&parent, chain, &key_next,
1473 key_next, HAMMER2_KEY_MAX,
1477 hammer2_chain_unlock(parent);
1478 hammer2_chain_drop(parent);
1480 hammer2_inode_unlock(spmp->iroot);
1485 hammer2_remount(hammer2_dev_t *hmp, struct mount *mp, char *path __unused,
1486 struct vnode *devvp, struct ucred *cred)
1490 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
1491 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1492 VOP_OPEN(devvp, FREAD | FWRITE, FSCRED, NULL);
1494 error = hammer2_recovery(hmp);
1495 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1497 VOP_CLOSE(devvp, FREAD, NULL);
1500 VOP_CLOSE(devvp, FREAD | FWRITE, NULL);
1511 hammer2_vfs_unmount(struct mount *mp, int mntflags)
1522 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
1525 * If mount initialization proceeded far enough we must flush
1526 * its vnodes and sync the underlying mount points. Three syncs
1527 * are required to fully flush the filesystem (freemap updates lag
1528 * by one flush, and one extra for safety).
1530 if (mntflags & MNT_FORCE)
1535 error = vflush(mp, 0, flags);
1538 hammer2_vfs_sync(mp, MNT_WAIT);
1539 hammer2_vfs_sync(mp, MNT_WAIT);
1540 hammer2_vfs_sync(mp, MNT_WAIT);
1544 * Cleanup the frontend support XOPS threads
1546 hammer2_xop_helper_cleanup(pmp);
1549 hammer2_unmount_helper(mp, pmp, NULL);
1553 lockmgr(&hammer2_mntlk, LK_RELEASE);
1559 * Mount helper, hook the system mount into our PFS.
1560 * The mount lock is held.
1562 * We must bump the mount_count on related devices for any
1567 hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp)
1569 hammer2_cluster_t *cluster;
1570 hammer2_chain_t *rchain;
1573 mp->mnt_data = (qaddr_t)pmp;
1577 * After pmp->mp is set we have to adjust hmp->mount_count.
1579 cluster = &pmp->iroot->cluster;
1580 for (i = 0; i < cluster->nchains; ++i) {
1581 rchain = cluster->array[i].chain;
1584 ++rchain->hmp->mount_count;
1585 kprintf("hammer2_mount hmp=%p ++mount_count=%d\n",
1586 rchain->hmp, rchain->hmp->mount_count);
1590 * Create missing Xop threads
1592 hammer2_xop_helper_create(pmp);
1596 * Mount helper, unhook the system mount from our PFS.
1597 * The mount lock is held.
1599 * If hmp is supplied a mount responsible for being the first to open
1600 * the block device failed and the block device and all PFSs using the
1601 * block device must be cleaned up.
1603 * If pmp is supplied multiple devices might be backing the PFS and each
1604 * must be disconnected. This might not be the last PFS using some of the
1605 * underlying devices. Also, we have to adjust our hmp->mount_count
1606 * accounting for the devices backing the pmp which is now undergoing an
1611 hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, hammer2_dev_t *hmp)
1613 hammer2_cluster_t *cluster;
1614 hammer2_chain_t *rchain;
1615 struct vnode *devvp;
1621 * If no device supplied this is a high-level unmount and we have to
1622 * to disconnect the mount, adjust mount_count, and locate devices
1623 * that might now have no mounts.
1626 KKASSERT(hmp == NULL);
1627 KKASSERT((void *)(intptr_t)mp->mnt_data == pmp);
1629 mp->mnt_data = NULL;
1632 * After pmp->mp is cleared we have to account for
1635 cluster = &pmp->iroot->cluster;
1636 for (i = 0; i < cluster->nchains; ++i) {
1637 rchain = cluster->array[i].chain;
1640 --rchain->hmp->mount_count;
1641 kprintf("hammer2_unmount hmp=%p --mount_count=%d\n",
1642 rchain->hmp, rchain->hmp->mount_count);
1643 /* scrapping hmp now may invalidate the pmp */
1646 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1647 if (hmp->mount_count == 0) {
1648 hammer2_unmount_helper(NULL, NULL, hmp);
1656 * Try to terminate the block device. We can't terminate it if
1657 * there are still PFSs referencing it.
1659 kprintf("hammer2_unmount hmp=%p mount_count=%d\n",
1660 hmp, hmp->mount_count);
1661 if (hmp->mount_count)
1664 hammer2_bulkfree_uninit(hmp);
1665 hammer2_pfsfree_scan(hmp);
1666 hammer2_dev_exlock(hmp); /* XXX order */
1669 * Cycle the volume data lock as a safety (probably not needed any
1670 * more). To ensure everything is out we need to flush at least
1671 * three times. (1) The running of the sideq can dirty the
1672 * filesystem, (2) A normal flush can dirty the freemap, and
1673 * (3) ensure that the freemap is fully synchronized.
1675 * The next mount's recovery scan can clean everything up but we want
1676 * to leave the filesystem in a 100% clean state on a normal unmount.
1679 hammer2_voldata_lock(hmp);
1680 hammer2_voldata_unlock(hmp);
1682 hammer2_iocom_uninit(hmp);
1684 if ((hmp->vchain.flags | hmp->fchain.flags) &
1685 HAMMER2_CHAIN_FLUSH_MASK) {
1686 kprintf("hammer2_unmount: chains left over "
1687 "after final sync\n");
1688 kprintf(" vchain %08x\n", hmp->vchain.flags);
1689 kprintf(" fchain %08x\n", hmp->fchain.flags);
1691 if (hammer2_debug & 0x0010)
1692 Debugger("entered debugger");
1695 KKASSERT(hmp->spmp == NULL);
1698 * Finish up with the device vnode
1700 if ((devvp = hmp->devvp) != NULL) {
1702 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1703 kprintf("hammer2_unmount(A): devvp %s rbdirty %p ronly=%d\n",
1704 hmp->devrepname, RB_ROOT(&devvp->v_rbdirty_tree),
1706 vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0);
1707 kprintf("hammer2_unmount(B): devvp %s rbdirty %p\n",
1708 hmp->devrepname, RB_ROOT(&devvp->v_rbdirty_tree));
1710 VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE), NULL);
1717 * Clear vchain/fchain flags that might prevent final cleanup
1720 if (hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) {
1721 atomic_add_long(&hammer2_count_modified_chains, -1);
1722 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED);
1723 hammer2_pfs_memory_wakeup(hmp->vchain.pmp);
1725 if (hmp->vchain.flags & HAMMER2_CHAIN_UPDATE) {
1726 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_UPDATE);
1729 if (hmp->fchain.flags & HAMMER2_CHAIN_MODIFIED) {
1730 atomic_add_long(&hammer2_count_modified_chains, -1);
1731 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_MODIFIED);
1732 hammer2_pfs_memory_wakeup(hmp->fchain.pmp);
1734 if (hmp->fchain.flags & HAMMER2_CHAIN_UPDATE) {
1735 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_UPDATE);
1739 * Final drop of embedded freemap root chain to
1740 * clean up fchain.core (fchain structure is not
1741 * flagged ALLOCATED so it is cleaned out and then
1744 hammer2_chain_drop(&hmp->fchain);
1747 * Final drop of embedded volume root chain to clean
1748 * up vchain.core (vchain structure is not flagged
1749 * ALLOCATED so it is cleaned out and then left to
1753 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt, 'v');
1755 hammer2_dump_chain(&hmp->fchain, 0, &dumpcnt, 'f');
1756 hammer2_dev_unlock(hmp);
1757 hammer2_chain_drop(&hmp->vchain);
1759 hammer2_io_cleanup(hmp, &hmp->iotree);
1760 if (hmp->iofree_count) {
1761 kprintf("io_cleanup: %d I/O's left hanging\n",
1765 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry);
1766 kmalloc_destroy(&hmp->mchain);
1767 kfree(hmp, M_HAMMER2);
1771 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp,
1772 ino_t ino, struct vnode **vpp)
1774 hammer2_xop_lookup_t *xop;
1776 hammer2_inode_t *ip;
1780 inum = (hammer2_tid_t)ino & HAMMER2_DIRHASH_USERMSK;
1786 * Easy if we already have it cached
1788 ip = hammer2_inode_lookup(pmp, inum);
1790 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED);
1791 *vpp = hammer2_igetv(ip, &error);
1792 hammer2_inode_unlock(ip);
1793 hammer2_inode_drop(ip); /* from lookup */
1799 * Otherwise we have to find the inode
1801 xop = hammer2_xop_alloc(pmp->iroot, 0);
1803 hammer2_xop_start(&xop->head, hammer2_xop_lookup);
1804 error = hammer2_xop_collect(&xop->head, 0);
1807 if (hammer2_cluster_rdata(&xop->head.cluster) == NULL) {
1808 kprintf("vget: no collect error but also no rdata\n");
1809 kprintf("xop %p\n", xop);
1810 while ((hammer2_debug & 0x80000) == 0) {
1811 tsleep(xop, PCATCH, "wait", hz * 10);
1815 ip = hammer2_inode_get(pmp, NULL, &xop->head.cluster, -1);
1818 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1821 *vpp = hammer2_igetv(ip, &error);
1822 hammer2_inode_unlock(ip);
1832 hammer2_vfs_root(struct mount *mp, struct vnode **vpp)
1839 if (pmp->iroot == NULL) {
1845 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1847 while (pmp->inode_tid == 0) {
1848 hammer2_xop_ipcluster_t *xop;
1849 hammer2_inode_meta_t *meta;
1851 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING);
1852 hammer2_xop_start(&xop->head, hammer2_xop_ipcluster);
1853 error = hammer2_xop_collect(&xop->head, 0);
1856 meta = &xop->head.cluster.focus->data->ipdata.meta;
1857 pmp->iroot->meta = *meta;
1858 pmp->inode_tid = meta->pfs_inum + 1;
1859 if (pmp->inode_tid < HAMMER2_INODE_START)
1860 pmp->inode_tid = HAMMER2_INODE_START;
1862 xop->head.cluster.focus->bref.modify_tid + 1;
1863 kprintf("PFS: Starting inode %jd\n",
1864 (intmax_t)pmp->inode_tid);
1865 kprintf("PMP focus good set nextino=%ld mod=%016jx\n",
1866 pmp->inode_tid, pmp->modify_tid);
1867 wakeup(&pmp->iroot);
1869 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1872 * Prime the mount info.
1874 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL);
1881 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1882 hammer2_inode_unlock(pmp->iroot);
1883 error = tsleep(&pmp->iroot, PCATCH, "h2root", hz);
1884 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1890 hammer2_inode_unlock(pmp->iroot);
1893 vp = hammer2_igetv(pmp->iroot, &error);
1894 hammer2_inode_unlock(pmp->iroot);
1904 * XXX incorporate ipdata->meta.inode_quota and data_quota
1908 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
1912 hammer2_blockref_t bref;
1916 * NOTE: iroot might not have validated the cluster yet.
1920 mp->mnt_stat.f_files = 0;
1921 mp->mnt_stat.f_ffree = 0;
1922 mp->mnt_stat.f_blocks = 0;
1923 mp->mnt_stat.f_bfree = 0;
1924 mp->mnt_stat.f_bavail = 0;
1926 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1927 hmp = pmp->pfs_hmps[i];
1930 if (pmp->iroot->cluster.array[i].chain)
1931 bref = pmp->iroot->cluster.array[i].chain->bref;
1933 bzero(&bref, sizeof(bref));
1935 mp->mnt_stat.f_files = bref.embed.stats.inode_count;
1936 mp->mnt_stat.f_ffree = 0;
1937 mp->mnt_stat.f_blocks = hmp->voldata.allocator_size /
1938 mp->mnt_vstat.f_bsize;
1939 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free /
1940 mp->mnt_vstat.f_bsize;
1941 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
1943 if (cred && cred->cr_uid != 0) {
1947 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize;
1948 mp->mnt_stat.f_blocks -= adj;
1949 mp->mnt_stat.f_bfree -= adj;
1950 mp->mnt_stat.f_bavail -= adj;
1953 *sbp = mp->mnt_stat;
1960 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
1964 hammer2_blockref_t bref;
1968 * NOTE: iroot might not have validated the cluster yet.
1972 mp->mnt_vstat.f_bsize = 0;
1973 mp->mnt_vstat.f_files = 0;
1974 mp->mnt_vstat.f_ffree = 0;
1975 mp->mnt_vstat.f_blocks = 0;
1976 mp->mnt_vstat.f_bfree = 0;
1977 mp->mnt_vstat.f_bavail = 0;
1979 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1980 hmp = pmp->pfs_hmps[i];
1983 if (pmp->iroot->cluster.array[i].chain)
1984 bref = pmp->iroot->cluster.array[i].chain->bref;
1986 bzero(&bref, sizeof(bref));
1988 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1989 mp->mnt_vstat.f_files = bref.embed.stats.inode_count;
1990 mp->mnt_vstat.f_ffree = 0;
1991 mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size /
1992 mp->mnt_vstat.f_bsize;
1993 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free /
1994 mp->mnt_vstat.f_bsize;
1995 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree;
1997 if (cred && cred->cr_uid != 0) {
2001 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize;
2002 mp->mnt_vstat.f_blocks -= adj;
2003 mp->mnt_vstat.f_bfree -= adj;
2004 mp->mnt_vstat.f_bavail -= adj;
2007 *sbp = mp->mnt_vstat;
2013 * Mount-time recovery (RW mounts)
2015 * Updates to the free block table are allowed to lag flushes by one
2016 * transaction. In case of a crash, then on a fresh mount we must do an
2017 * incremental scan of the last committed transaction id and make sure that
2018 * all related blocks have been marked allocated.
2020 * The super-root topology and each PFS has its own transaction id domain,
2021 * so we must track PFS boundary transitions.
2023 struct hammer2_recovery_elm {
2024 TAILQ_ENTRY(hammer2_recovery_elm) entry;
2025 hammer2_chain_t *chain;
2026 hammer2_tid_t sync_tid;
2029 TAILQ_HEAD(hammer2_recovery_list, hammer2_recovery_elm);
2031 struct hammer2_recovery_info {
2032 struct hammer2_recovery_list list;
2037 static int hammer2_recovery_scan(hammer2_dev_t *hmp,
2038 hammer2_chain_t *parent,
2039 struct hammer2_recovery_info *info,
2040 hammer2_tid_t sync_tid);
2042 #define HAMMER2_RECOVERY_MAXDEPTH 10
2046 hammer2_recovery(hammer2_dev_t *hmp)
2048 struct hammer2_recovery_info info;
2049 struct hammer2_recovery_elm *elm;
2050 hammer2_chain_t *parent;
2051 hammer2_tid_t sync_tid;
2052 hammer2_tid_t mirror_tid;
2055 hammer2_trans_init(hmp->spmp, 0);
2057 sync_tid = hmp->voldata.freemap_tid;
2058 mirror_tid = hmp->voldata.mirror_tid;
2060 kprintf("hammer2 mount \"%s\": ", hmp->devrepname);
2061 if (sync_tid >= mirror_tid) {
2062 kprintf(" no recovery needed\n");
2064 kprintf(" freemap recovery %016jx-%016jx\n",
2065 sync_tid + 1, mirror_tid);
2068 TAILQ_INIT(&info.list);
2070 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
2071 error = hammer2_recovery_scan(hmp, parent, &info, sync_tid);
2072 hammer2_chain_lookup_done(parent);
2074 while ((elm = TAILQ_FIRST(&info.list)) != NULL) {
2075 TAILQ_REMOVE(&info.list, elm, entry);
2076 parent = elm->chain;
2077 sync_tid = elm->sync_tid;
2078 kfree(elm, M_HAMMER2);
2080 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2081 error |= hammer2_recovery_scan(hmp, parent, &info,
2082 hmp->voldata.freemap_tid);
2083 hammer2_chain_unlock(parent);
2084 hammer2_chain_drop(parent); /* drop elm->chain ref */
2086 hammer2_trans_done(hmp->spmp);
2093 hammer2_recovery_scan(hammer2_dev_t *hmp, hammer2_chain_t *parent,
2094 struct hammer2_recovery_info *info,
2095 hammer2_tid_t sync_tid)
2097 const hammer2_inode_data_t *ripdata;
2098 hammer2_chain_t *chain;
2099 hammer2_blockref_t bref;
2106 * Adjust freemap to ensure that the block(s) are marked allocated.
2108 if (parent->bref.type != HAMMER2_BREF_TYPE_VOLUME) {
2109 hammer2_freemap_adjust(hmp, &parent->bref,
2110 HAMMER2_FREEMAP_DORECOVER);
2114 * Check type for recursive scan
2116 switch(parent->bref.type) {
2117 case HAMMER2_BREF_TYPE_VOLUME:
2118 /* data already instantiated */
2120 case HAMMER2_BREF_TYPE_INODE:
2122 * Must instantiate data for DIRECTDATA test and also
2125 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2126 ripdata = &hammer2_chain_rdata(parent)->ipdata;
2127 if (ripdata->meta.op_flags & HAMMER2_OPFLAG_DIRECTDATA) {
2128 /* not applicable to recovery scan */
2129 hammer2_chain_unlock(parent);
2132 hammer2_chain_unlock(parent);
2134 case HAMMER2_BREF_TYPE_INDIRECT:
2136 * Must instantiate data for recursion
2138 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2139 hammer2_chain_unlock(parent);
2141 case HAMMER2_BREF_TYPE_DIRENT:
2142 case HAMMER2_BREF_TYPE_DATA:
2143 case HAMMER2_BREF_TYPE_FREEMAP:
2144 case HAMMER2_BREF_TYPE_FREEMAP_NODE:
2145 case HAMMER2_BREF_TYPE_FREEMAP_LEAF:
2146 /* not applicable to recovery scan */
2150 return HAMMER2_ERROR_BADBREF;
2154 * Defer operation if depth limit reached or if we are crossing a
2157 if (info->depth >= HAMMER2_RECOVERY_MAXDEPTH) {
2158 struct hammer2_recovery_elm *elm;
2160 elm = kmalloc(sizeof(*elm), M_HAMMER2, M_ZERO | M_WAITOK);
2161 elm->chain = parent;
2162 elm->sync_tid = sync_tid;
2163 hammer2_chain_ref(parent);
2164 TAILQ_INSERT_TAIL(&info->list, elm, entry);
2165 /* unlocked by caller */
2172 * Recursive scan of the last flushed transaction only. We are
2173 * doing this without pmp assignments so don't leave the chains
2174 * hanging around after we are done with them.
2176 * error Cumulative error this level only
2177 * rup_error Cumulative error for recursion
2178 * tmp_error Specific non-cumulative recursion error
2186 error |= hammer2_chain_scan(parent, &chain, &bref,
2188 HAMMER2_LOOKUP_NODATA);
2191 * Problem during scan or EOF
2199 if (chain == NULL) {
2200 if (bref.mirror_tid > sync_tid) {
2201 hammer2_freemap_adjust(hmp, &bref,
2202 HAMMER2_FREEMAP_DORECOVER);
2208 * This may or may not be a recursive node.
2210 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
2211 if (bref.mirror_tid > sync_tid) {
2213 tmp_error = hammer2_recovery_scan(hmp, chain,
2221 * Flush the recovery at the PFS boundary to stage it for
2222 * the final flush of the super-root topology.
2224 if (tmp_error == 0 &&
2225 (bref.flags & HAMMER2_BREF_FLAG_PFSROOT) &&
2226 (chain->flags & HAMMER2_CHAIN_ONFLUSH)) {
2227 hammer2_flush(chain, HAMMER2_FLUSH_TOP);
2229 rup_error |= tmp_error;
2231 return ((error | rup_error) & ~HAMMER2_ERROR_EOF);
2235 * Sync a mount point; this is called on a per-mount basis from the
2236 * filesystem syncer process periodically and whenever a user issues
2240 hammer2_vfs_sync(struct mount *mp, int waitfor)
2242 hammer2_xop_flush_t *xop;
2243 struct hammer2_sync_info info;
2244 hammer2_inode_t *iroot;
2252 KKASSERT(iroot->pmp == pmp);
2255 * We can't acquire locks on existing vnodes while in a transaction
2256 * without risking a deadlock. This assumes that vfsync() can be
2257 * called without the vnode locked (which it can in DragonFly).
2258 * Otherwise we'd have to implement a multi-pass or flag the lock
2259 * failures and retry.
2261 * The reclamation code interlocks with the sync list's token
2262 * (by removing the vnode from the scan list) before unlocking
2263 * the inode, giving us time to ref the inode.
2265 /*flags = VMSC_GETVP;*/
2267 if (waitfor & MNT_LAZY)
2268 flags |= VMSC_ONEPASS;
2271 * Preflush the vnodes using a normal transaction before interlocking
2272 * with a flush transaction. We do this to try to run as much of
2273 * the compression as possible outside the flush transaction.
2275 * For efficiency do an async pass before making sure with a
2276 * synchronous pass on all related buffer cache buffers.
2278 hammer2_trans_init(pmp, 0);
2280 info.waitfor = MNT_NOWAIT;
2281 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2282 info.waitfor = MNT_WAIT;
2283 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2284 hammer2_trans_done(pmp);
2287 * Start our flush transaction. This does not return until all
2288 * concurrent transactions have completed and will prevent any
2289 * new transactions from running concurrently, except for the
2290 * buffer cache transactions.
2292 * NOTE! It is still possible for the paging code to push pages
2293 * out via a UIO_NOCOPY hammer2_vop_write() during the main
2296 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH);
2297 hammer2_inode_run_sideq(pmp);
2300 info.waitfor = MNT_NOWAIT;
2301 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2302 info.waitfor = MNT_WAIT;
2303 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2304 hammer2_bioq_sync(pmp);
2307 * Use the XOP interface to concurrently flush all nodes to
2308 * synchronize the PFSROOT subtopology to the media. A standard
2309 * end-of-scan ENOENT error indicates cluster sufficiency.
2311 * Note that this flush will not be visible on crash recovery until
2312 * we flush the super-root topology in the next loop.
2314 * XXX For now wait for all flushes to complete.
2317 xop = hammer2_xop_alloc(iroot, HAMMER2_XOP_MODIFYING);
2318 hammer2_xop_start(&xop->head, hammer2_inode_xop_flush);
2319 error = hammer2_xop_collect(&xop->head,
2320 HAMMER2_XOP_COLLECT_WAITALL);
2321 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
2322 if (error == HAMMER2_ERROR_ENOENT)
2325 error = hammer2_error_to_errno(error);
2329 hammer2_trans_done(pmp);
2337 * Note that we ignore the tranasction mtid we got above. Instead,
2338 * each vfsync below will ultimately get its own via TRANS_BUFCACHE
2342 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
2344 struct hammer2_sync_info *info = data;
2345 hammer2_inode_t *ip;
2349 * Degenerate cases. Note that ip == NULL typically means the
2350 * syncer vnode itself and we don't want to vclrisdirty() in that
2357 if (vp->v_type == VNON || vp->v_type == VBAD) {
2363 * VOP_FSYNC will start a new transaction so replicate some code
2364 * here to do it inline (see hammer2_vop_fsync()).
2366 * WARNING: The vfsync interacts with the buffer cache and might
2367 * block, we can't hold the inode lock at that time.
2368 * However, we MUST ref ip before blocking to ensure that
2369 * it isn't ripped out from under us (since we do not
2370 * hold a lock on the vnode).
2372 hammer2_inode_ref(ip);
2373 if ((ip->flags & HAMMER2_INODE_MODIFIED) ||
2374 !RB_EMPTY(&vp->v_rbdirty_tree)) {
2375 vfsync(vp, info->waitfor, 1, NULL, NULL);
2376 if (ip->flags & (HAMMER2_INODE_RESIZED |
2377 HAMMER2_INODE_MODIFIED)) {
2378 hammer2_inode_lock(ip, 0);
2379 if (ip->flags & (HAMMER2_INODE_RESIZED |
2380 HAMMER2_INODE_MODIFIED)) {
2381 hammer2_inode_chain_sync(ip);
2383 hammer2_inode_unlock(ip);
2386 if ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 &&
2387 RB_EMPTY(&vp->v_rbdirty_tree)) {
2391 hammer2_inode_drop(ip);
2395 info->error = error;
2402 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp)
2404 hammer2_inode_t *ip;
2406 KKASSERT(MAXFIDSZ >= 16);
2408 fhp->fid_len = offsetof(struct fid, fid_data[16]);
2410 ((hammer2_tid_t *)fhp->fid_data)[0] = ip->meta.inum;
2411 ((hammer2_tid_t *)fhp->fid_data)[1] = 0;
2418 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
2419 struct fid *fhp, struct vnode **vpp)
2426 inum = ((hammer2_tid_t *)fhp->fid_data)[0] & HAMMER2_DIRHASH_USERMSK;
2429 error = hammer2_vfs_root(mp, vpp);
2431 error = hammer2_vfs_vget(mp, NULL, inum, vpp);
2436 kprintf("fhtovp: %016jx -> %p, %d\n", inum, *vpp, error);
2442 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
2443 int *exflagsp, struct ucred **credanonp)
2450 np = vfs_export_lookup(mp, &pmp->export, nam);
2452 *exflagsp = np->netc_exflags;
2453 *credanonp = &np->netc_anon;
2462 * Support code for hammer2_vfs_mount(). Read, verify, and install the volume
2463 * header into the HMP
2465 * XXX read four volhdrs and use the one with the highest TID whos CRC
2470 * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to
2471 * nonexistant locations.
2473 * XXX Record selected volhdr and ring updates to each of 4 volhdrs
2477 hammer2_install_volume_header(hammer2_dev_t *hmp)
2479 hammer2_volume_data_t *vd;
2481 hammer2_crc32_t crc0, crc, bcrc0, bcrc;
2493 * There are up to 4 copies of the volume header (syncs iterate
2494 * between them so there is no single master). We don't trust the
2495 * volu_size field so we don't know precisely how large the filesystem
2496 * is, so depend on the OS to return an error if we go beyond the
2497 * block device's EOF.
2499 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
2500 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64,
2501 HAMMER2_VOLUME_BYTES, &bp);
2508 vd = (struct hammer2_volume_data *) bp->b_data;
2509 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) &&
2510 (vd->magic != HAMMER2_VOLUME_ID_ABO)) {
2516 if (vd->magic == HAMMER2_VOLUME_ID_ABO) {
2517 /* XXX: Reversed-endianness filesystem */
2518 kprintf("hammer2: reverse-endian filesystem detected");
2524 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0];
2525 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF,
2526 HAMMER2_VOLUME_ICRC0_SIZE);
2527 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1];
2528 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF,
2529 HAMMER2_VOLUME_ICRC1_SIZE);
2530 if ((crc0 != crc) || (bcrc0 != bcrc)) {
2531 kprintf("hammer2 volume header crc "
2532 "mismatch copy #%d %08x/%08x\n",
2539 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) {
2548 hmp->volsync = hmp->voldata;
2549 hmp->free_reserved = hmp->voldata.allocator_size / 20;
2551 if (error_reported || bootverbose || 1) { /* 1/DEBUG */
2552 kprintf("hammer2: using volume header #%d\n",
2557 kprintf("hammer2: no valid volume headers found!\n");
2563 * This handles hysteresis on regular file flushes. Because the BIOs are
2564 * routed to a thread it is possible for an excessive number to build up
2565 * and cause long front-end stalls long before the runningbuffspace limit
2566 * is hit, so we implement hammer2_flush_pipe to control the
2569 * This is a particular problem when compression is used.
2572 hammer2_lwinprog_ref(hammer2_pfs_t *pmp)
2574 atomic_add_int(&pmp->count_lwinprog, 1);
2578 hammer2_lwinprog_drop(hammer2_pfs_t *pmp)
2582 lwinprog = atomic_fetchadd_int(&pmp->count_lwinprog, -1);
2583 if ((lwinprog & HAMMER2_LWINPROG_WAITING) &&
2584 (lwinprog & HAMMER2_LWINPROG_MASK) <= hammer2_flush_pipe * 2 / 3) {
2585 atomic_clear_int(&pmp->count_lwinprog,
2586 HAMMER2_LWINPROG_WAITING);
2587 wakeup(&pmp->count_lwinprog);
2589 if ((lwinprog & HAMMER2_LWINPROG_WAITING0) &&
2590 (lwinprog & HAMMER2_LWINPROG_MASK) <= 0) {
2591 atomic_clear_int(&pmp->count_lwinprog,
2592 HAMMER2_LWINPROG_WAITING0);
2593 wakeup(&pmp->count_lwinprog);
2598 hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int flush_pipe)
2601 int lwflag = (flush_pipe) ? HAMMER2_LWINPROG_WAITING :
2602 HAMMER2_LWINPROG_WAITING0;
2605 lwinprog = pmp->count_lwinprog;
2607 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2609 tsleep_interlock(&pmp->count_lwinprog, 0);
2610 atomic_set_int(&pmp->count_lwinprog, lwflag);
2611 lwinprog = pmp->count_lwinprog;
2612 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2614 tsleep(&pmp->count_lwinprog, PINTERLOCKED, "h2wpipe", hz);
2619 * Manage excessive memory resource use for chain and related
2623 hammer2_pfs_memory_wait(hammer2_pfs_t *pmp)
2633 * Atomic check condition and wait. Also do an early speedup of
2634 * the syncer to try to avoid hitting the wait.
2637 waiting = pmp->inmem_dirty_chains;
2639 count = waiting & HAMMER2_DIRTYCHAIN_MASK;
2641 limit = pmp->mp->mnt_nvnodelistsize / 10;
2642 if (limit < hammer2_limit_dirty_chains)
2643 limit = hammer2_limit_dirty_chains;
2648 if ((int)(ticks - zzticks) > hz) {
2650 kprintf("count %ld %ld\n", count, limit);
2655 * Block if there are too many dirty chains present, wait
2656 * for the flush to clean some out.
2658 if (count > limit) {
2659 tsleep_interlock(&pmp->inmem_dirty_chains, 0);
2660 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2662 waiting | HAMMER2_DIRTYCHAIN_WAITING)) {
2663 speedup_syncer(pmp->mp);
2664 tsleep(&pmp->inmem_dirty_chains, PINTERLOCKED,
2667 continue; /* loop on success or fail */
2671 * Try to start an early flush before we are forced to block.
2673 if (count > limit * 7 / 10)
2674 speedup_syncer(pmp->mp);
2680 hammer2_pfs_memory_inc(hammer2_pfs_t *pmp)
2683 atomic_add_int(&pmp->inmem_dirty_chains, 1);
2688 hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp)
2696 waiting = pmp->inmem_dirty_chains;
2698 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2701 ~HAMMER2_DIRTYCHAIN_WAITING)) {
2706 if (waiting & HAMMER2_DIRTYCHAIN_WAITING)
2707 wakeup(&pmp->inmem_dirty_chains);
2711 * Returns 0 if the filesystem has tons of free space
2712 * Returns 1 if the filesystem has less than 10% remaining
2713 * Returns 2 if the filesystem has less than 2%/5% (user/root) remaining.
2716 hammer2_vfs_enospace(hammer2_inode_t *ip, off_t bytes, struct ucred *cred)
2720 hammer2_off_t free_reserved;
2721 hammer2_off_t free_nominal;
2726 if (pmp->free_ticks == 0 || pmp->free_ticks != ticks) {
2727 free_reserved = HAMMER2_SEGSIZE;
2728 free_nominal = 0x7FFFFFFFFFFFFFFFLLU;
2729 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
2730 hmp = pmp->pfs_hmps[i];
2733 if (pmp->pfs_types[i] != HAMMER2_PFSTYPE_MASTER &&
2734 pmp->pfs_types[i] != HAMMER2_PFSTYPE_SOFT_MASTER)
2737 if (free_nominal > hmp->voldata.allocator_free)
2738 free_nominal = hmp->voldata.allocator_free;
2739 if (free_reserved < hmp->free_reserved)
2740 free_reserved = hmp->free_reserved;
2746 pmp->free_reserved = free_reserved;
2747 pmp->free_nominal = free_nominal;
2748 pmp->free_ticks = ticks;
2750 free_reserved = pmp->free_reserved;
2751 free_nominal = pmp->free_nominal;
2753 if (cred && cred->cr_uid != 0) {
2754 if ((int64_t)(free_nominal - bytes) <
2755 (int64_t)free_reserved) {
2759 if ((int64_t)(free_nominal - bytes) <
2760 (int64_t)free_reserved / 2) {
2764 if ((int64_t)(free_nominal - bytes) < (int64_t)free_reserved * 2)
2773 hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx)
2775 hammer2_chain_t *scan;
2776 hammer2_chain_t *parent;
2780 kprintf("%*.*s...\n", tab, tab, "");
2785 kprintf("%*.*s%c-chain %p.%d %016jx/%d mir=%016jx\n",
2787 chain, chain->bref.type,
2788 chain->bref.key, chain->bref.keybits,
2789 chain->bref.mirror_tid);
2791 kprintf("%*.*s [%08x] (%s) refs=%d",
2794 ((chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
2795 chain->data) ? (char *)chain->data->ipdata.filename : "?"),
2798 parent = chain->parent;
2800 kprintf("\n%*.*s p=%p [pflags %08x prefs %d",
2802 parent, parent->flags, parent->refs);
2803 if (RB_EMPTY(&chain->core.rbtree)) {
2807 RB_FOREACH(scan, hammer2_chain_tree, &chain->core.rbtree)
2808 hammer2_dump_chain(scan, tab + 4, countp, 'a');
2809 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && chain->data)
2810 kprintf("%*.*s}(%s)\n", tab, tab, "",
2811 chain->data->ipdata.filename);
2813 kprintf("%*.*s}\n", tab, tab, "");