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_meta_read = 1; /* physical read-ahead */
82 int hammer2_cluster_data_read = 4; /* physical read-ahead */
83 int hammer2_cluster_write = 4; /* physical clustering (not file vp) */
84 int hammer2_dedup_enable = 1;
85 int hammer2_always_compress = 0; /* always try to compress */
86 int hammer2_inval_enable = 0;
87 int hammer2_flush_pipe = 100;
88 int hammer2_synchronous_flush = 1;
89 int hammer2_dio_count;
90 int hammer2_limit_dio = 256;
91 int hammer2_bulkfree_tps = 5000;
92 long hammer2_chain_allocs;
93 long hammer2_chain_frees;
94 long hammer2_limit_dirty_chains;
95 long hammer2_count_modified_chains;
96 long hammer2_iod_invals;
97 long hammer2_iod_file_read;
98 long hammer2_iod_meta_read;
99 long hammer2_iod_indr_read;
100 long hammer2_iod_fmap_read;
101 long hammer2_iod_volu_read;
102 long hammer2_iod_file_write;
103 long hammer2_iod_file_wembed;
104 long hammer2_iod_file_wzero;
105 long hammer2_iod_file_wdedup;
106 long hammer2_iod_meta_write;
107 long hammer2_iod_indr_write;
108 long hammer2_iod_fmap_write;
109 long hammer2_iod_volu_write;
111 MALLOC_DECLARE(M_HAMMER2_CBUFFER);
112 MALLOC_DEFINE(M_HAMMER2_CBUFFER, "HAMMER2-compbuffer",
113 "Buffer used for compression.");
115 MALLOC_DECLARE(M_HAMMER2_DEBUFFER);
116 MALLOC_DEFINE(M_HAMMER2_DEBUFFER, "HAMMER2-decompbuffer",
117 "Buffer used for decompression.");
119 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem");
121 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW,
122 &hammer2_debug, 0, "");
123 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_meta_read, CTLFLAG_RW,
124 &hammer2_cluster_meta_read, 0, "");
125 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_data_read, CTLFLAG_RW,
126 &hammer2_cluster_data_read, 0, "");
127 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_write, CTLFLAG_RW,
128 &hammer2_cluster_write, 0, "");
129 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dedup_enable, CTLFLAG_RW,
130 &hammer2_dedup_enable, 0, "");
131 SYSCTL_INT(_vfs_hammer2, OID_AUTO, always_compress, CTLFLAG_RW,
132 &hammer2_always_compress, 0, "");
133 SYSCTL_INT(_vfs_hammer2, OID_AUTO, inval_enable, CTLFLAG_RW,
134 &hammer2_inval_enable, 0, "");
135 SYSCTL_INT(_vfs_hammer2, OID_AUTO, flush_pipe, CTLFLAG_RW,
136 &hammer2_flush_pipe, 0, "");
137 SYSCTL_INT(_vfs_hammer2, OID_AUTO, synchronous_flush, CTLFLAG_RW,
138 &hammer2_synchronous_flush, 0, "");
139 SYSCTL_INT(_vfs_hammer2, OID_AUTO, bulkfree_tps, CTLFLAG_RW,
140 &hammer2_bulkfree_tps, 0, "");
141 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_allocs, CTLFLAG_RW,
142 &hammer2_chain_allocs, 0, "");
143 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, chain_frees, CTLFLAG_RW,
144 &hammer2_chain_frees, 0, "");
145 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, limit_dirty_chains, CTLFLAG_RW,
146 &hammer2_limit_dirty_chains, 0, "");
147 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, count_modified_chains, CTLFLAG_RW,
148 &hammer2_count_modified_chains, 0, "");
149 SYSCTL_INT(_vfs_hammer2, OID_AUTO, dio_count, CTLFLAG_RD,
150 &hammer2_dio_count, 0, "");
151 SYSCTL_INT(_vfs_hammer2, OID_AUTO, limit_dio, CTLFLAG_RW,
152 &hammer2_limit_dio, 0, "");
154 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_invals, CTLFLAG_RW,
155 &hammer2_iod_invals, 0, "");
156 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RW,
157 &hammer2_iod_file_read, 0, "");
158 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RW,
159 &hammer2_iod_meta_read, 0, "");
160 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RW,
161 &hammer2_iod_indr_read, 0, "");
162 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_read, CTLFLAG_RW,
163 &hammer2_iod_fmap_read, 0, "");
164 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_read, CTLFLAG_RW,
165 &hammer2_iod_volu_read, 0, "");
167 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RW,
168 &hammer2_iod_file_write, 0, "");
169 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wembed, CTLFLAG_RW,
170 &hammer2_iod_file_wembed, 0, "");
171 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wzero, CTLFLAG_RW,
172 &hammer2_iod_file_wzero, 0, "");
173 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_wdedup, CTLFLAG_RW,
174 &hammer2_iod_file_wdedup, 0, "");
175 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RW,
176 &hammer2_iod_meta_write, 0, "");
177 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RW,
178 &hammer2_iod_indr_write, 0, "");
179 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_fmap_write, CTLFLAG_RW,
180 &hammer2_iod_fmap_write, 0, "");
181 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RW,
182 &hammer2_iod_volu_write, 0, "");
184 long hammer2_check_icrc32;
185 long hammer2_check_xxhash64;
186 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_icrc32, CTLFLAG_RW,
187 &hammer2_check_icrc32, 0, "");
188 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, check_xxhash64, CTLFLAG_RW,
189 &hammer2_check_xxhash64, 0, "");
191 static int hammer2_vfs_init(struct vfsconf *conf);
192 static int hammer2_vfs_uninit(struct vfsconf *vfsp);
193 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
195 static int hammer2_remount(hammer2_dev_t *, struct mount *, char *,
196 struct vnode *, struct ucred *);
197 static int hammer2_recovery(hammer2_dev_t *hmp);
198 static int hammer2_vfs_unmount(struct mount *mp, int mntflags);
199 static int hammer2_vfs_root(struct mount *mp, struct vnode **vpp);
200 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp,
202 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
204 static int hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
205 struct fid *fhp, struct vnode **vpp);
206 static int hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp);
207 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
208 int *exflagsp, struct ucred **credanonp);
210 static int hammer2_install_volume_header(hammer2_dev_t *hmp);
211 static int hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
213 static void hammer2_update_pmps(hammer2_dev_t *hmp);
215 static void hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp);
216 static void hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp,
220 * HAMMER2 vfs operations.
222 static struct vfsops hammer2_vfsops = {
223 .vfs_init = hammer2_vfs_init,
224 .vfs_uninit = hammer2_vfs_uninit,
225 .vfs_sync = hammer2_vfs_sync,
226 .vfs_mount = hammer2_vfs_mount,
227 .vfs_unmount = hammer2_vfs_unmount,
228 .vfs_root = hammer2_vfs_root,
229 .vfs_statfs = hammer2_vfs_statfs,
230 .vfs_statvfs = hammer2_vfs_statvfs,
231 .vfs_vget = hammer2_vfs_vget,
232 .vfs_vptofh = hammer2_vfs_vptofh,
233 .vfs_fhtovp = hammer2_vfs_fhtovp,
234 .vfs_checkexp = hammer2_vfs_checkexp
237 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", "");
239 VFS_SET(hammer2_vfsops, hammer2, VFCF_MPSAFE);
240 MODULE_VERSION(hammer2, 1);
244 hammer2_vfs_init(struct vfsconf *conf)
246 static struct objcache_malloc_args margs_read;
247 static struct objcache_malloc_args margs_write;
248 static struct objcache_malloc_args margs_vop;
255 * A large DIO cache is needed to retain dedup enablement masks.
256 * The bulkfree code clears related masks as part of the disk block
257 * recycling algorithm, preventing it from being used for a later
260 * NOTE: A large buffer cache can actually interfere with dedup
261 * operation because we dedup based on media physical buffers
262 * and not logical buffers. Try to make the DIO chace large
263 * enough to avoid this problem, but also cap it.
265 hammer2_limit_dio = nbuf * 2;
266 if (hammer2_limit_dio > 100000)
267 hammer2_limit_dio = 100000;
269 if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref))
271 if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data))
273 if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data))
277 kprintf("HAMMER2 structure size mismatch; cannot continue.\n");
279 margs_read.objsize = 65536;
280 margs_read.mtype = M_HAMMER2_DEBUFFER;
282 margs_write.objsize = 32768;
283 margs_write.mtype = M_HAMMER2_CBUFFER;
285 margs_vop.objsize = sizeof(hammer2_xop_t);
286 margs_vop.mtype = M_HAMMER2;
289 * Note thaht for the XOPS cache we want backing store allocations
290 * to use M_ZERO. This is not allowed in objcache_get() (to avoid
291 * confusion), so use the backing store function that does it. This
292 * means that initial XOPS objects are zerod but REUSED objects are
293 * not. So we are responsible for cleaning the object up sufficiently
294 * for our needs before objcache_put()ing it back (typically just the
297 cache_buffer_read = objcache_create(margs_read.mtype->ks_shortdesc,
298 0, 1, NULL, NULL, NULL,
299 objcache_malloc_alloc,
300 objcache_malloc_free,
302 cache_buffer_write = objcache_create(margs_write.mtype->ks_shortdesc,
303 0, 1, NULL, NULL, NULL,
304 objcache_malloc_alloc,
305 objcache_malloc_free,
307 cache_xops = objcache_create(margs_vop.mtype->ks_shortdesc,
308 0, 1, NULL, NULL, NULL,
309 objcache_malloc_alloc_zero,
310 objcache_malloc_free,
314 lockinit(&hammer2_mntlk, "mntlk", 0, 0);
315 TAILQ_INIT(&hammer2_mntlist);
316 TAILQ_INIT(&hammer2_pfslist);
318 hammer2_limit_dirty_chains = maxvnodes / 10;
319 if (hammer2_limit_dirty_chains > HAMMER2_LIMIT_DIRTY_CHAINS)
320 hammer2_limit_dirty_chains = HAMMER2_LIMIT_DIRTY_CHAINS;
327 hammer2_vfs_uninit(struct vfsconf *vfsp __unused)
329 objcache_destroy(cache_buffer_read);
330 objcache_destroy(cache_buffer_write);
331 objcache_destroy(cache_xops);
336 * Core PFS allocator. Used to allocate or reference the pmp structure
337 * for PFS cluster mounts and the spmp structure for media (hmp) structures.
338 * The pmp can be passed in or loaded by this function using the chain and
341 * pmp->modify_tid tracks new modify_tid transaction ids for front-end
342 * transactions. Note that synchronization does not use this field.
343 * (typically frontend operations and synchronization cannot run on the
344 * same PFS node at the same time).
349 hammer2_pfsalloc(hammer2_chain_t *chain,
350 const hammer2_inode_data_t *ripdata,
351 hammer2_tid_t modify_tid, hammer2_dev_t *force_local)
354 hammer2_inode_t *iroot;
362 * Locate or create the PFS based on the cluster id. If ripdata
363 * is NULL this is a spmp which is unique and is always allocated.
365 * If the device is mounted in local mode all PFSs are considered
366 * independent and not part of any cluster (for debugging only).
369 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
370 if (force_local != pmp->force_local)
372 if (force_local == NULL &&
373 bcmp(&pmp->pfs_clid, &ripdata->meta.pfs_clid,
374 sizeof(pmp->pfs_clid)) == 0) {
376 } else if (force_local && pmp->pfs_names[0] &&
377 strcmp(pmp->pfs_names[0], ripdata->filename) == 0) {
384 pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO);
385 pmp->force_local = force_local;
386 hammer2_trans_manage_init(pmp);
387 kmalloc_create(&pmp->minode, "HAMMER2-inodes");
388 kmalloc_create(&pmp->mmsg, "HAMMER2-pfsmsg");
389 lockinit(&pmp->lock, "pfslk", 0, 0);
390 lockinit(&pmp->lock_nlink, "h2nlink", 0, 0);
391 spin_init(&pmp->inum_spin, "hm2pfsalloc_inum");
392 spin_init(&pmp->xop_spin, "h2xop");
393 spin_init(&pmp->lru_spin, "h2lru");
394 RB_INIT(&pmp->inum_tree);
395 TAILQ_INIT(&pmp->sideq);
396 TAILQ_INIT(&pmp->lru_list);
397 spin_init(&pmp->list_spin, "hm2pfsalloc_list");
400 * Distribute backend operations to threads
402 for (i = 0; i < HAMMER2_XOPGROUPS; ++i)
403 hammer2_xop_group_init(pmp, &pmp->xop_groups[i]);
406 * Save the last media transaction id for the flusher. Set
410 pmp->pfs_clid = ripdata->meta.pfs_clid;
411 TAILQ_INSERT_TAIL(&hammer2_pfslist, pmp, mntentry);
414 * The synchronization thread may start too early, make
415 * sure it stays frozen until we are ready to let it go.
419 pmp->primary_thr.flags = HAMMER2_THREAD_FROZEN |
420 HAMMER2_THREAD_REMASTER;
425 * Create the PFS's root inode and any missing XOP helper threads.
427 if ((iroot = pmp->iroot) == NULL) {
428 iroot = hammer2_inode_get(pmp, NULL, NULL, -1);
430 iroot->meta = ripdata->meta;
432 hammer2_inode_ref(iroot);
433 hammer2_inode_unlock(iroot);
437 * Stop here if no chain is passed in.
443 * When a chain is passed in we must add it to the PFS's root
444 * inode, update pmp->pfs_types[], and update the syncronization
447 * When forcing local mode, mark the PFS as a MASTER regardless.
449 * At the moment empty spots can develop due to removals or failures.
450 * Ultimately we want to re-fill these spots but doing so might
451 * confused running code. XXX
453 hammer2_inode_ref(iroot);
454 hammer2_mtx_ex(&iroot->lock);
455 j = iroot->cluster.nchains;
457 kprintf("add PFS to pmp %p[%d]\n", pmp, j);
459 if (j == HAMMER2_MAXCLUSTER) {
460 kprintf("hammer2_mount: cluster full!\n");
461 /* XXX fatal error? */
463 KKASSERT(chain->pmp == NULL);
465 hammer2_chain_ref(chain);
466 iroot->cluster.array[j].chain = chain;
468 pmp->pfs_types[j] = HAMMER2_PFSTYPE_MASTER;
470 pmp->pfs_types[j] = ripdata->meta.pfs_type;
471 pmp->pfs_names[j] = kstrdup(ripdata->filename, M_HAMMER2);
472 pmp->pfs_hmps[j] = chain->hmp;
475 * If the PFS is already mounted we must account
476 * for the mount_count here.
479 ++chain->hmp->mount_count;
482 * May have to fixup dirty chain tracking. Previous
483 * pmp was NULL so nothing to undo.
485 if (chain->flags & HAMMER2_CHAIN_MODIFIED)
486 hammer2_pfs_memory_inc(pmp);
489 iroot->cluster.nchains = j;
492 * Update nmasters from any PFS inode which is part of the cluster.
493 * It is possible that this will result in a value which is too
494 * high. MASTER PFSs are authoritative for pfs_nmasters and will
495 * override this value later on.
497 * (This informs us of masters that might not currently be
498 * discoverable by this mount).
500 if (ripdata && pmp->pfs_nmasters < ripdata->meta.pfs_nmasters) {
501 pmp->pfs_nmasters = ripdata->meta.pfs_nmasters;
505 * Count visible masters. Masters are usually added with
506 * ripdata->meta.pfs_nmasters set to 1. This detects when there
507 * are more (XXX and must update the master inodes).
510 for (i = 0; i < iroot->cluster.nchains; ++i) {
511 if (pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER)
514 if (pmp->pfs_nmasters < count)
515 pmp->pfs_nmasters = count;
518 * Create missing synchronization and support threads.
520 * Single-node masters (including snapshots) have nothing to
521 * synchronize and do not require this thread.
523 * Multi-node masters or any number of soft masters, slaves, copy,
524 * or other PFS types need the thread.
526 * Each thread is responsible for its particular cluster index.
527 * We use independent threads so stalls or mismatches related to
528 * any given target do not affect other targets.
530 for (i = 0; i < iroot->cluster.nchains; ++i) {
532 * Single-node masters (including snapshots) have nothing
533 * to synchronize and will make direct xops support calls,
534 * thus they do not require this thread.
536 * Note that there can be thousands of snapshots. We do not
537 * want to create thousands of threads.
539 if (pmp->pfs_nmasters <= 1 &&
540 pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) {
545 * Sync support thread
547 if (pmp->sync_thrs[i].td == NULL) {
548 hammer2_thr_create(&pmp->sync_thrs[i], pmp, NULL,
550 hammer2_primary_sync_thread);
555 * Create missing Xop threads
557 * NOTE: We create helper threads for all mounted PFSs or any
558 * PFSs with 2+ nodes (so the sync thread can update them,
559 * even if not mounted).
561 if (pmp->mp || iroot->cluster.nchains >= 2)
562 hammer2_xop_helper_create(pmp);
564 hammer2_mtx_unlock(&iroot->lock);
565 hammer2_inode_drop(iroot);
571 * Deallocate an element of a probed PFS. If destroying and this is a
572 * MASTER, adjust nmasters.
574 * This function does not physically destroy the PFS element in its device
575 * under the super-root (see hammer2_ioctl_pfs_delete()).
578 hammer2_pfsdealloc(hammer2_pfs_t *pmp, int clindex, int destroying)
580 hammer2_inode_t *iroot;
581 hammer2_chain_t *chain;
585 * Cleanup our reference on iroot. iroot is (should) not be needed
593 * XXX flush after acquiring the iroot lock.
594 * XXX clean out the cluster index from all inode structures.
596 hammer2_thr_delete(&pmp->sync_thrs[clindex]);
599 * Remove the cluster index from the group. If destroying
600 * the PFS and this is a master, adjust pfs_nmasters.
602 hammer2_mtx_ex(&iroot->lock);
603 chain = iroot->cluster.array[clindex].chain;
604 iroot->cluster.array[clindex].chain = NULL;
606 switch(pmp->pfs_types[clindex]) {
607 case HAMMER2_PFSTYPE_MASTER:
608 if (destroying && pmp->pfs_nmasters > 0)
610 /* XXX adjust ripdata->meta.pfs_nmasters */
615 pmp->pfs_types[clindex] = HAMMER2_PFSTYPE_NONE;
617 hammer2_mtx_unlock(&iroot->lock);
623 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
624 hammer2_chain_drop(chain);
628 * Terminate all XOP threads for the cluster index.
630 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
631 hammer2_thr_delete(&pmp->xop_groups[j].thrs[clindex]);
636 * Destroy a PFS, typically only occurs after the last mount on a device
640 hammer2_pfsfree(hammer2_pfs_t *pmp)
642 hammer2_inode_t *iroot;
643 hammer2_chain_t *chain;
648 * Cleanup our reference on iroot. iroot is (should) not be needed
651 TAILQ_REMOVE(&hammer2_pfslist, pmp, mntentry);
655 for (i = 0; i < iroot->cluster.nchains; ++i) {
656 hammer2_thr_delete(&pmp->sync_thrs[i]);
657 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
658 hammer2_thr_delete(&pmp->xop_groups[j].thrs[i]);
660 #if REPORT_REFS_ERRORS
661 if (pmp->iroot->refs != 1)
662 kprintf("PMP->IROOT %p REFS WRONG %d\n",
663 pmp->iroot, pmp->iroot->refs);
665 KKASSERT(pmp->iroot->refs == 1);
667 /* ref for pmp->iroot */
668 hammer2_inode_drop(pmp->iroot);
673 * Cleanup chains remaining on LRU list.
675 kprintf("pfsfree: %p lrucount=%d\n", pmp, pmp->lru_count);
676 while ((chain = TAILQ_FIRST(&pmp->lru_list)) != NULL) {
677 hammer2_chain_ref(chain);
678 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
679 hammer2_chain_drop(chain);
683 * Free remaining pmp resources
685 kmalloc_destroy(&pmp->mmsg);
686 kmalloc_destroy(&pmp->minode);
688 kfree(pmp, M_HAMMER2);
692 * Remove all references to hmp from the pfs list. Any PFS which becomes
693 * empty is terminated and freed.
698 hammer2_pfsfree_scan(hammer2_dev_t *hmp)
701 hammer2_inode_t *iroot;
702 hammer2_chain_t *rchain;
708 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
709 if ((iroot = pmp->iroot) == NULL)
711 if (hmp->spmp == pmp) {
712 kprintf("unmount hmp %p remove spmp %p\n",
718 * Determine if this PFS is affected. If it is we must
719 * freeze all management threads and lock its iroot.
721 * Freezing a management thread forces it idle, operations
722 * in-progress will be aborted and it will have to start
723 * over again when unfrozen, or exit if told to exit.
725 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
726 if (pmp->pfs_hmps[i] == hmp)
729 if (i != HAMMER2_MAXCLUSTER) {
731 * Make sure all synchronization threads are locked
734 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
735 if (pmp->pfs_hmps[i] == NULL)
737 hammer2_thr_freeze_async(&pmp->sync_thrs[i]);
738 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
739 hammer2_thr_freeze_async(
740 &pmp->xop_groups[j].thrs[i]);
743 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
744 if (pmp->pfs_hmps[i] == NULL)
746 hammer2_thr_freeze(&pmp->sync_thrs[i]);
747 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
749 &pmp->xop_groups[j].thrs[i]);
754 * Lock the inode and clean out matching chains.
755 * Note that we cannot use hammer2_inode_lock_*()
756 * here because that would attempt to validate the
757 * cluster that we are in the middle of ripping
760 * WARNING! We are working directly on the inodes
763 hammer2_mtx_ex(&iroot->lock);
766 * Remove the chain from matching elements of the PFS.
768 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
769 if (pmp->pfs_hmps[i] != hmp)
771 hammer2_thr_delete(&pmp->sync_thrs[i]);
772 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
774 &pmp->xop_groups[j].thrs[i]);
776 rchain = iroot->cluster.array[i].chain;
777 iroot->cluster.array[i].chain = NULL;
778 pmp->pfs_types[i] = 0;
779 if (pmp->pfs_names[i]) {
780 kfree(pmp->pfs_names[i], M_HAMMER2);
781 pmp->pfs_names[i] = NULL;
784 hammer2_chain_drop(rchain);
786 if (iroot->cluster.focus == rchain)
787 iroot->cluster.focus = NULL;
789 pmp->pfs_hmps[i] = NULL;
791 hammer2_mtx_unlock(&iroot->lock);
792 didfreeze = 1; /* remaster, unfreeze down below */
798 * Cleanup trailing chains. Gaps may remain.
800 for (i = HAMMER2_MAXCLUSTER - 1; i >= 0; --i) {
801 if (pmp->pfs_hmps[i])
804 iroot->cluster.nchains = i + 1;
807 * If the PMP has no elements remaining we can destroy it.
808 * (this will transition management threads from frozen->exit).
810 if (iroot->cluster.nchains == 0) {
811 kprintf("unmount hmp %p last ref to PMP=%p\n",
813 hammer2_pfsfree(pmp);
818 * If elements still remain we need to set the REMASTER
819 * flag and unfreeze it.
822 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
823 if (pmp->pfs_hmps[i] == NULL)
825 hammer2_thr_remaster(&pmp->sync_thrs[i]);
826 hammer2_thr_unfreeze(&pmp->sync_thrs[i]);
827 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
828 hammer2_thr_remaster(
829 &pmp->xop_groups[j].thrs[i]);
830 hammer2_thr_unfreeze(
831 &pmp->xop_groups[j].thrs[i]);
839 * Mount or remount HAMMER2 fileystem from physical media
842 * mp mount point structure
848 * mp mount point structure
849 * path path to mount point
850 * data pointer to argument structure in user space
851 * volume volume path (device@LABEL form)
852 * hflags user mount flags
853 * cred user credentials
860 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
863 struct hammer2_mount_info info;
867 hammer2_dev_t *force_local;
868 hammer2_key_t key_next;
869 hammer2_key_t key_dummy;
872 struct nlookupdata nd;
873 hammer2_chain_t *parent;
874 hammer2_chain_t *chain;
875 hammer2_cluster_t *cluster;
876 const hammer2_inode_data_t *ripdata;
877 hammer2_blockref_t bref;
879 char devstr[MNAMELEN];
894 kprintf("hammer2_mount\n");
900 bzero(&info, sizeof(info));
901 info.cluster_fd = -1;
902 ksnprintf(devstr, sizeof(devstr), "%s",
903 mp->mnt_stat.f_mntfromname);
904 kprintf("hammer2_mount: root '%s'\n", devstr);
907 * Non-root mount or updating a mount
909 error = copyin(data, &info, sizeof(info));
913 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done);
919 * Extract device and label, automatically mount @BOOT, @ROOT, or @DATA
920 * if no label specified, based on the partition id. Error out if no
921 * label or device (with partition id) is specified. This is strictly
922 * a convenience to match the default label created by newfs_hammer2,
923 * our preference is that a label always be specified.
925 * NOTE: We allow 'mount @LABEL <blah>'... that is, a mount command
926 * that does not specify a device, as long as some H2 label
927 * has already been mounted from that device. This makes
928 * mounting snapshots a lot easier.
931 label = strchr(devstr, '@');
932 if (label && ((label + 1) - dev) > done)
934 if (label == NULL || label[1] == 0) {
938 label = devstr + strlen(devstr);
956 kprintf("hammer2_mount: dev=\"%s\" label=\"%s\" rdonly=%d\n",
957 dev, label, (mp->mnt_flag & MNT_RDONLY));
959 if (mp->mnt_flag & MNT_UPDATE) {
961 * Update mount. Note that pmp->iroot->cluster is
962 * an inode-embedded cluster and thus cannot be
965 * XXX HAMMER2 needs to implement NFS export via
969 pmp->hflags = info.hflags;
970 cluster = &pmp->iroot->cluster;
971 for (i = 0; i < cluster->nchains; ++i) {
972 if (cluster->array[i].chain == NULL)
974 hmp = cluster->array[i].chain->hmp;
976 error = hammer2_remount(hmp, mp, path,
988 * If a path is specified and dev is not an empty string, lookup the
989 * name and verify that it referes to a block device.
991 * If a path is specified and dev is an empty string we fall through
992 * and locate the label in the hmp search.
994 if (path && *dev != 0) {
995 error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW);
997 error = nlookup(&nd);
999 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
1001 } else if (path == NULL) {
1003 cdev_t cdev = kgetdiskbyname(dev);
1004 error = bdevvp(cdev, &devvp);
1006 kprintf("hammer2: cannot find '%s'\n", dev);
1009 * We will locate the hmp using the label in the hmp loop.
1015 * Make sure its a block device. Do not check to see if it is
1016 * already mounted until we determine that its a fresh H2 device.
1018 if (error == 0 && devvp) {
1019 vn_isdisk(devvp, &error);
1023 * Determine if the device has already been mounted. After this
1024 * check hmp will be non-NULL if we are doing the second or more
1025 * hammer2 mounts from the same device.
1027 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
1030 * Match the device. Due to the way devfs works,
1031 * we may not be able to directly match the vnode pointer,
1032 * so also check to see if the underlying device matches.
1034 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1035 if (hmp->devvp == devvp)
1037 if (devvp->v_rdev &&
1038 hmp->devvp->v_rdev == devvp->v_rdev) {
1044 * If no match this may be a fresh H2 mount, make sure
1045 * the device is not mounted on anything else.
1048 error = vfs_mountedon(devvp);
1049 } else if (error == 0) {
1051 * Match the label to a pmp already probed.
1053 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
1054 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
1055 if (pmp->pfs_names[i] &&
1056 strcmp(pmp->pfs_names[i], label) == 0) {
1057 hmp = pmp->pfs_hmps[i];
1069 * Open the device if this isn't a secondary mount and construct
1070 * the H2 device mount (hmp).
1073 hammer2_chain_t *schain;
1076 if (error == 0 && vcount(devvp) > 0) {
1077 kprintf("Primary device already has references\n");
1082 * Now open the device
1085 ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
1086 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1087 error = vinvalbuf(devvp, V_SAVE, 0, 0);
1089 error = VOP_OPEN(devvp,
1090 (ronly ? FREAD : FREAD | FWRITE),
1095 if (error && devvp) {
1100 lockmgr(&hammer2_mntlk, LK_RELEASE);
1103 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO);
1104 ksnprintf(hmp->devrepname, sizeof(hmp->devrepname), "%s", dev);
1107 hmp->hflags = info.hflags & HMNT2_DEVFLAGS;
1108 kmalloc_create(&hmp->mchain, "HAMMER2-chains");
1109 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry);
1110 RB_INIT(&hmp->iotree);
1111 spin_init(&hmp->io_spin, "hm2mount_io");
1112 spin_init(&hmp->list_spin, "hm2mount_list");
1113 TAILQ_INIT(&hmp->flushq);
1115 lockinit(&hmp->vollk, "h2vol", 0, 0);
1116 lockinit(&hmp->bulklk, "h2bulk", 0, 0);
1117 lockinit(&hmp->bflock, "h2bflk", 0, 0);
1120 * vchain setup. vchain.data is embedded.
1121 * vchain.refs is initialized and will never drop to 0.
1123 * NOTE! voldata is not yet loaded.
1125 hmp->vchain.hmp = hmp;
1126 hmp->vchain.refs = 1;
1127 hmp->vchain.data = (void *)&hmp->voldata;
1128 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME;
1129 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
1130 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1132 hammer2_chain_core_init(&hmp->vchain);
1133 /* hmp->vchain.u.xxx is left NULL */
1136 * fchain setup. fchain.data is embedded.
1137 * fchain.refs is initialized and will never drop to 0.
1139 * The data is not used but needs to be initialized to
1140 * pass assertion muster. We use this chain primarily
1141 * as a placeholder for the freemap's top-level RBTREE
1142 * so it does not interfere with the volume's topology
1145 hmp->fchain.hmp = hmp;
1146 hmp->fchain.refs = 1;
1147 hmp->fchain.data = (void *)&hmp->voldata.freemap_blockset;
1148 hmp->fchain.bref.type = HAMMER2_BREF_TYPE_FREEMAP;
1149 hmp->fchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
1150 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1151 hmp->fchain.bref.methods =
1152 HAMMER2_ENC_CHECK(HAMMER2_CHECK_FREEMAP) |
1153 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE);
1155 hammer2_chain_core_init(&hmp->fchain);
1156 /* hmp->fchain.u.xxx is left NULL */
1159 * Install the volume header and initialize fields from
1162 error = hammer2_install_volume_header(hmp);
1164 hammer2_unmount_helper(mp, NULL, hmp);
1165 lockmgr(&hammer2_mntlk, LK_RELEASE);
1166 hammer2_vfs_unmount(mp, MNT_FORCE);
1171 * Really important to get these right or flush will get
1174 hmp->spmp = hammer2_pfsalloc(NULL, NULL, 0, NULL);
1175 kprintf("alloc spmp %p tid %016jx\n",
1176 hmp->spmp, hmp->voldata.mirror_tid);
1180 * Dummy-up vchain and fchain's modify_tid. mirror_tid
1181 * is inherited from the volume header.
1184 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1185 hmp->vchain.bref.modify_tid = hmp->vchain.bref.mirror_tid;
1186 hmp->vchain.pmp = spmp;
1187 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1188 hmp->fchain.bref.modify_tid = hmp->fchain.bref.mirror_tid;
1189 hmp->fchain.pmp = spmp;
1192 * First locate the super-root inode, which is key 0
1193 * relative to the volume header's blockset.
1195 * Then locate the root inode by scanning the directory keyspace
1196 * represented by the label.
1198 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
1199 schain = hammer2_chain_lookup(&parent, &key_dummy,
1200 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY,
1202 hammer2_chain_lookup_done(parent);
1203 if (schain == NULL) {
1204 kprintf("hammer2_mount: invalid super-root\n");
1205 hammer2_unmount_helper(mp, NULL, hmp);
1206 lockmgr(&hammer2_mntlk, LK_RELEASE);
1207 hammer2_vfs_unmount(mp, MNT_FORCE);
1210 if (schain->error) {
1211 kprintf("hammer2_mount: error %s reading super-root\n",
1212 hammer2_error_str(schain->error));
1213 hammer2_chain_unlock(schain);
1214 hammer2_chain_drop(schain);
1216 hammer2_unmount_helper(mp, NULL, hmp);
1217 lockmgr(&hammer2_mntlk, LK_RELEASE);
1218 hammer2_vfs_unmount(mp, MNT_FORCE);
1223 * The super-root always uses an inode_tid of 1 when
1226 spmp->inode_tid = 1;
1227 spmp->modify_tid = schain->bref.modify_tid + 1;
1230 * Sanity-check schain's pmp and finish initialization.
1231 * Any chain belonging to the super-root topology should
1232 * have a NULL pmp (not even set to spmp).
1234 ripdata = &hammer2_chain_rdata(schain)->ipdata;
1235 KKASSERT(schain->pmp == NULL);
1236 spmp->pfs_clid = ripdata->meta.pfs_clid;
1239 * Replace the dummy spmp->iroot with a real one. It's
1240 * easier to just do a wholesale replacement than to try
1241 * to update the chain and fixup the iroot fields.
1243 * The returned inode is locked with the supplied cluster.
1245 cluster = hammer2_cluster_from_chain(schain);
1246 hammer2_inode_drop(spmp->iroot);
1248 spmp->iroot = hammer2_inode_get(spmp, NULL, cluster, -1);
1249 spmp->spmp_hmp = hmp;
1250 spmp->pfs_types[0] = ripdata->meta.pfs_type;
1251 spmp->pfs_hmps[0] = hmp;
1252 hammer2_inode_ref(spmp->iroot);
1253 hammer2_inode_unlock(spmp->iroot);
1254 hammer2_cluster_unlock(cluster);
1255 hammer2_cluster_drop(cluster);
1257 /* leave spmp->iroot with one ref */
1259 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
1260 error = hammer2_recovery(hmp);
1261 /* XXX do something with error */
1263 hammer2_update_pmps(hmp);
1264 hammer2_iocom_init(hmp);
1265 hammer2_bulkfree_init(hmp);
1268 * Ref the cluster management messaging descriptor. The mount
1269 * program deals with the other end of the communications pipe.
1271 * Root mounts typically do not supply one.
1273 if (info.cluster_fd >= 0) {
1274 fp = holdfp(curproc->p_fd, info.cluster_fd, -1);
1276 hammer2_cluster_reconnect(hmp, fp);
1278 kprintf("hammer2_mount: bad cluster_fd!\n");
1283 if (info.hflags & HMNT2_DEVFLAGS) {
1284 kprintf("hammer2: Warning: mount flags pertaining "
1285 "to the whole device may only be specified "
1286 "on the first mount of the device: %08x\n",
1287 info.hflags & HMNT2_DEVFLAGS);
1292 * Force local mount (disassociate all PFSs from their clusters).
1293 * Used primarily for debugging.
1295 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1298 * Lookup the mount point under the media-localized super-root.
1299 * Scanning hammer2_pfslist doesn't help us because it represents
1300 * PFS cluster ids which can aggregate several named PFSs together.
1302 * cluster->pmp will incorrectly point to spmp and must be fixed
1305 hammer2_inode_lock(spmp->iroot, 0);
1306 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1307 lhc = hammer2_dirhash(label, strlen(label));
1308 chain = hammer2_chain_lookup(&parent, &key_next,
1309 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1312 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1313 strcmp(label, chain->data->ipdata.filename) == 0) {
1316 chain = hammer2_chain_next(&parent, chain, &key_next,
1318 lhc + HAMMER2_DIRHASH_LOMASK,
1322 hammer2_chain_unlock(parent);
1323 hammer2_chain_drop(parent);
1325 hammer2_inode_unlock(spmp->iroot);
1328 * PFS could not be found?
1330 if (chain == NULL) {
1332 kprintf("hammer2_mount: PFS label I/O error\n");
1334 kprintf("hammer2_mount: PFS label not found\n");
1335 hammer2_unmount_helper(mp, NULL, hmp);
1336 lockmgr(&hammer2_mntlk, LK_RELEASE);
1337 hammer2_vfs_unmount(mp, MNT_FORCE);
1343 * Acquire the pmp structure (it should have already been allocated
1344 * via hammer2_update_pmps() so do not pass cluster in to add to
1345 * available chains).
1347 * Check if the cluster has already been mounted. A cluster can
1348 * only be mounted once, use null mounts to mount additional copies.
1351 kprintf("hammer2_mount: PFS label I/O error\n");
1353 ripdata = &chain->data->ipdata;
1355 pmp = hammer2_pfsalloc(NULL, ripdata,
1356 bref.modify_tid, force_local);
1358 hammer2_chain_unlock(chain);
1359 hammer2_chain_drop(chain);
1364 kprintf("hammer2_mount hmp=%p pmp=%p\n", hmp, pmp);
1367 kprintf("hammer2_mount: PFS already mounted!\n");
1368 hammer2_unmount_helper(mp, NULL, hmp);
1369 lockmgr(&hammer2_mntlk, LK_RELEASE);
1370 hammer2_vfs_unmount(mp, MNT_FORCE);
1375 pmp->hflags = info.hflags;
1376 mp->mnt_flag |= MNT_LOCAL;
1377 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */
1378 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
1381 * required mount structure initializations
1383 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE;
1384 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE;
1386 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE;
1387 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1392 mp->mnt_iosize_max = MAXPHYS;
1395 * Connect up mount pointers.
1397 hammer2_mount_helper(mp, pmp);
1399 lockmgr(&hammer2_mntlk, LK_RELEASE);
1405 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops);
1406 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops);
1407 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops);
1410 copyinstr(info.volume, mp->mnt_stat.f_mntfromname,
1411 MNAMELEN - 1, &size);
1412 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
1413 } /* else root mount, already in there */
1415 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname));
1417 copyinstr(path, mp->mnt_stat.f_mntonname,
1418 sizeof(mp->mnt_stat.f_mntonname) - 1,
1422 mp->mnt_stat.f_mntonname[0] = '/';
1426 * Initial statfs to prime mnt_stat.
1428 hammer2_vfs_statfs(mp, &mp->mnt_stat, cred);
1434 * Scan PFSs under the super-root and create hammer2_pfs structures.
1438 hammer2_update_pmps(hammer2_dev_t *hmp)
1440 const hammer2_inode_data_t *ripdata;
1441 hammer2_chain_t *parent;
1442 hammer2_chain_t *chain;
1443 hammer2_blockref_t bref;
1444 hammer2_dev_t *force_local;
1445 hammer2_pfs_t *spmp;
1447 hammer2_key_t key_next;
1451 * Force local mount (disassociate all PFSs from their clusters).
1452 * Used primarily for debugging.
1454 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1457 * Lookup mount point under the media-localized super-root.
1459 * cluster->pmp will incorrectly point to spmp and must be fixed
1463 hammer2_inode_lock(spmp->iroot, 0);
1464 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1465 chain = hammer2_chain_lookup(&parent, &key_next,
1466 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX,
1469 if (chain->bref.type != HAMMER2_BREF_TYPE_INODE)
1472 kprintf("I/O error scanning PFS labels\n");
1474 ripdata = &chain->data->ipdata;
1476 kprintf("ADD LOCAL PFS: %s\n", ripdata->filename);
1478 pmp = hammer2_pfsalloc(chain, ripdata,
1479 bref.modify_tid, force_local);
1481 chain = hammer2_chain_next(&parent, chain, &key_next,
1482 key_next, HAMMER2_KEY_MAX,
1486 hammer2_chain_unlock(parent);
1487 hammer2_chain_drop(parent);
1489 hammer2_inode_unlock(spmp->iroot);
1494 hammer2_remount(hammer2_dev_t *hmp, struct mount *mp, char *path __unused,
1495 struct vnode *devvp, struct ucred *cred)
1499 if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
1500 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1501 VOP_OPEN(devvp, FREAD | FWRITE, FSCRED, NULL);
1503 error = hammer2_recovery(hmp);
1504 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1506 VOP_CLOSE(devvp, FREAD, NULL);
1509 VOP_CLOSE(devvp, FREAD | FWRITE, NULL);
1520 hammer2_vfs_unmount(struct mount *mp, int mntflags)
1531 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
1534 * If mount initialization proceeded far enough we must flush
1535 * its vnodes and sync the underlying mount points. Three syncs
1536 * are required to fully flush the filesystem (freemap updates lag
1537 * by one flush, and one extra for safety).
1539 if (mntflags & MNT_FORCE)
1544 error = vflush(mp, 0, flags);
1547 hammer2_vfs_sync(mp, MNT_WAIT);
1548 hammer2_vfs_sync(mp, MNT_WAIT);
1549 hammer2_vfs_sync(mp, MNT_WAIT);
1553 * Cleanup the frontend support XOPS threads
1555 hammer2_xop_helper_cleanup(pmp);
1558 hammer2_unmount_helper(mp, pmp, NULL);
1562 lockmgr(&hammer2_mntlk, LK_RELEASE);
1568 * Mount helper, hook the system mount into our PFS.
1569 * The mount lock is held.
1571 * We must bump the mount_count on related devices for any
1576 hammer2_mount_helper(struct mount *mp, hammer2_pfs_t *pmp)
1578 hammer2_cluster_t *cluster;
1579 hammer2_chain_t *rchain;
1582 mp->mnt_data = (qaddr_t)pmp;
1586 * After pmp->mp is set we have to adjust hmp->mount_count.
1588 cluster = &pmp->iroot->cluster;
1589 for (i = 0; i < cluster->nchains; ++i) {
1590 rchain = cluster->array[i].chain;
1593 ++rchain->hmp->mount_count;
1594 kprintf("hammer2_mount hmp=%p ++mount_count=%d\n",
1595 rchain->hmp, rchain->hmp->mount_count);
1599 * Create missing Xop threads
1601 hammer2_xop_helper_create(pmp);
1605 * Mount helper, unhook the system mount from our PFS.
1606 * The mount lock is held.
1608 * If hmp is supplied a mount responsible for being the first to open
1609 * the block device failed and the block device and all PFSs using the
1610 * block device must be cleaned up.
1612 * If pmp is supplied multiple devices might be backing the PFS and each
1613 * must be disconnected. This might not be the last PFS using some of the
1614 * underlying devices. Also, we have to adjust our hmp->mount_count
1615 * accounting for the devices backing the pmp which is now undergoing an
1620 hammer2_unmount_helper(struct mount *mp, hammer2_pfs_t *pmp, hammer2_dev_t *hmp)
1622 hammer2_cluster_t *cluster;
1623 hammer2_chain_t *rchain;
1624 struct vnode *devvp;
1630 * If no device supplied this is a high-level unmount and we have to
1631 * to disconnect the mount, adjust mount_count, and locate devices
1632 * that might now have no mounts.
1635 KKASSERT(hmp == NULL);
1636 KKASSERT((void *)(intptr_t)mp->mnt_data == pmp);
1638 mp->mnt_data = NULL;
1641 * After pmp->mp is cleared we have to account for
1644 cluster = &pmp->iroot->cluster;
1645 for (i = 0; i < cluster->nchains; ++i) {
1646 rchain = cluster->array[i].chain;
1649 --rchain->hmp->mount_count;
1650 kprintf("hammer2_unmount hmp=%p --mount_count=%d\n",
1651 rchain->hmp, rchain->hmp->mount_count);
1652 /* scrapping hmp now may invalidate the pmp */
1655 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1656 if (hmp->mount_count == 0) {
1657 hammer2_unmount_helper(NULL, NULL, hmp);
1665 * Try to terminate the block device. We can't terminate it if
1666 * there are still PFSs referencing it.
1668 kprintf("hammer2_unmount hmp=%p mount_count=%d\n",
1669 hmp, hmp->mount_count);
1670 if (hmp->mount_count)
1673 hammer2_bulkfree_uninit(hmp);
1674 hammer2_pfsfree_scan(hmp);
1675 hammer2_dev_exlock(hmp); /* XXX order */
1678 * Cycle the volume data lock as a safety (probably not needed any
1679 * more). To ensure everything is out we need to flush at least
1680 * three times. (1) The running of the sideq can dirty the
1681 * filesystem, (2) A normal flush can dirty the freemap, and
1682 * (3) ensure that the freemap is fully synchronized.
1684 * The next mount's recovery scan can clean everything up but we want
1685 * to leave the filesystem in a 100% clean state on a normal unmount.
1688 hammer2_voldata_lock(hmp);
1689 hammer2_voldata_unlock(hmp);
1691 hammer2_iocom_uninit(hmp);
1693 if ((hmp->vchain.flags | hmp->fchain.flags) &
1694 HAMMER2_CHAIN_FLUSH_MASK) {
1695 kprintf("hammer2_unmount: chains left over "
1696 "after final sync\n");
1697 kprintf(" vchain %08x\n", hmp->vchain.flags);
1698 kprintf(" fchain %08x\n", hmp->fchain.flags);
1700 if (hammer2_debug & 0x0010)
1701 Debugger("entered debugger");
1704 KKASSERT(hmp->spmp == NULL);
1707 * Finish up with the device vnode
1709 if ((devvp = hmp->devvp) != NULL) {
1711 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1712 kprintf("hammer2_unmount(A): devvp %s rbdirty %p ronly=%d\n",
1713 hmp->devrepname, RB_ROOT(&devvp->v_rbdirty_tree),
1715 vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0);
1716 kprintf("hammer2_unmount(B): devvp %s rbdirty %p\n",
1717 hmp->devrepname, RB_ROOT(&devvp->v_rbdirty_tree));
1719 VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE), NULL);
1726 * Clear vchain/fchain flags that might prevent final cleanup
1729 if (hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) {
1730 atomic_add_long(&hammer2_count_modified_chains, -1);
1731 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED);
1732 hammer2_pfs_memory_wakeup(hmp->vchain.pmp);
1734 if (hmp->vchain.flags & HAMMER2_CHAIN_UPDATE) {
1735 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_UPDATE);
1738 if (hmp->fchain.flags & HAMMER2_CHAIN_MODIFIED) {
1739 atomic_add_long(&hammer2_count_modified_chains, -1);
1740 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_MODIFIED);
1741 hammer2_pfs_memory_wakeup(hmp->fchain.pmp);
1743 if (hmp->fchain.flags & HAMMER2_CHAIN_UPDATE) {
1744 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_UPDATE);
1748 * Final drop of embedded freemap root chain to
1749 * clean up fchain.core (fchain structure is not
1750 * flagged ALLOCATED so it is cleaned out and then
1753 hammer2_chain_drop(&hmp->fchain);
1756 * Final drop of embedded volume root chain to clean
1757 * up vchain.core (vchain structure is not flagged
1758 * ALLOCATED so it is cleaned out and then left to
1762 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt, 'v');
1764 hammer2_dump_chain(&hmp->fchain, 0, &dumpcnt, 'f');
1765 hammer2_dev_unlock(hmp);
1766 hammer2_chain_drop(&hmp->vchain);
1768 hammer2_io_cleanup(hmp, &hmp->iotree);
1769 if (hmp->iofree_count) {
1770 kprintf("io_cleanup: %d I/O's left hanging\n",
1774 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry);
1775 kmalloc_destroy(&hmp->mchain);
1776 kfree(hmp, M_HAMMER2);
1780 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp,
1781 ino_t ino, struct vnode **vpp)
1783 hammer2_xop_lookup_t *xop;
1785 hammer2_inode_t *ip;
1789 inum = (hammer2_tid_t)ino & HAMMER2_DIRHASH_USERMSK;
1795 * Easy if we already have it cached
1797 ip = hammer2_inode_lookup(pmp, inum);
1799 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED);
1800 *vpp = hammer2_igetv(ip, &error);
1801 hammer2_inode_unlock(ip);
1802 hammer2_inode_drop(ip); /* from lookup */
1808 * Otherwise we have to find the inode
1810 xop = hammer2_xop_alloc(pmp->iroot, 0);
1812 hammer2_xop_start(&xop->head, hammer2_xop_lookup);
1813 error = hammer2_xop_collect(&xop->head, 0);
1816 if (hammer2_cluster_rdata(&xop->head.cluster) == NULL) {
1817 kprintf("vget: no collect error but also no rdata\n");
1818 kprintf("xop %p\n", xop);
1819 while ((hammer2_debug & 0x80000) == 0) {
1820 tsleep(xop, PCATCH, "wait", hz * 10);
1824 ip = hammer2_inode_get(pmp, NULL, &xop->head.cluster, -1);
1827 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1830 *vpp = hammer2_igetv(ip, &error);
1831 hammer2_inode_unlock(ip);
1841 hammer2_vfs_root(struct mount *mp, struct vnode **vpp)
1848 if (pmp->iroot == NULL) {
1854 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1856 while (pmp->inode_tid == 0) {
1857 hammer2_xop_ipcluster_t *xop;
1858 hammer2_inode_meta_t *meta;
1860 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING);
1861 hammer2_xop_start(&xop->head, hammer2_xop_ipcluster);
1862 error = hammer2_xop_collect(&xop->head, 0);
1865 meta = &xop->head.cluster.focus->data->ipdata.meta;
1866 pmp->iroot->meta = *meta;
1867 pmp->inode_tid = meta->pfs_inum + 1;
1868 if (pmp->inode_tid < HAMMER2_INODE_START)
1869 pmp->inode_tid = HAMMER2_INODE_START;
1871 xop->head.cluster.focus->bref.modify_tid + 1;
1872 kprintf("PFS: Starting inode %jd\n",
1873 (intmax_t)pmp->inode_tid);
1874 kprintf("PMP focus good set nextino=%ld mod=%016jx\n",
1875 pmp->inode_tid, pmp->modify_tid);
1876 wakeup(&pmp->iroot);
1878 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1881 * Prime the mount info.
1883 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL);
1890 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1891 hammer2_inode_unlock(pmp->iroot);
1892 error = tsleep(&pmp->iroot, PCATCH, "h2root", hz);
1893 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1899 hammer2_inode_unlock(pmp->iroot);
1902 vp = hammer2_igetv(pmp->iroot, &error);
1903 hammer2_inode_unlock(pmp->iroot);
1913 * XXX incorporate ipdata->meta.inode_quota and data_quota
1917 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
1921 hammer2_blockref_t bref;
1925 * NOTE: iroot might not have validated the cluster yet.
1929 mp->mnt_stat.f_files = 0;
1930 mp->mnt_stat.f_ffree = 0;
1931 mp->mnt_stat.f_blocks = 0;
1932 mp->mnt_stat.f_bfree = 0;
1933 mp->mnt_stat.f_bavail = 0;
1935 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1936 hmp = pmp->pfs_hmps[i];
1939 if (pmp->iroot->cluster.array[i].chain)
1940 bref = pmp->iroot->cluster.array[i].chain->bref;
1942 bzero(&bref, sizeof(bref));
1944 mp->mnt_stat.f_files = bref.embed.stats.inode_count;
1945 mp->mnt_stat.f_ffree = 0;
1946 mp->mnt_stat.f_blocks = hmp->voldata.allocator_size /
1947 mp->mnt_vstat.f_bsize;
1948 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free /
1949 mp->mnt_vstat.f_bsize;
1950 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
1952 if (cred && cred->cr_uid != 0) {
1956 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize;
1957 mp->mnt_stat.f_blocks -= adj;
1958 mp->mnt_stat.f_bfree -= adj;
1959 mp->mnt_stat.f_bavail -= adj;
1962 *sbp = mp->mnt_stat;
1969 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
1973 hammer2_blockref_t bref;
1977 * NOTE: iroot might not have validated the cluster yet.
1981 mp->mnt_vstat.f_bsize = 0;
1982 mp->mnt_vstat.f_files = 0;
1983 mp->mnt_vstat.f_ffree = 0;
1984 mp->mnt_vstat.f_blocks = 0;
1985 mp->mnt_vstat.f_bfree = 0;
1986 mp->mnt_vstat.f_bavail = 0;
1988 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1989 hmp = pmp->pfs_hmps[i];
1992 if (pmp->iroot->cluster.array[i].chain)
1993 bref = pmp->iroot->cluster.array[i].chain->bref;
1995 bzero(&bref, sizeof(bref));
1997 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1998 mp->mnt_vstat.f_files = bref.embed.stats.inode_count;
1999 mp->mnt_vstat.f_ffree = 0;
2000 mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size /
2001 mp->mnt_vstat.f_bsize;
2002 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free /
2003 mp->mnt_vstat.f_bsize;
2004 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree;
2006 if (cred && cred->cr_uid != 0) {
2010 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize;
2011 mp->mnt_vstat.f_blocks -= adj;
2012 mp->mnt_vstat.f_bfree -= adj;
2013 mp->mnt_vstat.f_bavail -= adj;
2016 *sbp = mp->mnt_vstat;
2022 * Mount-time recovery (RW mounts)
2024 * Updates to the free block table are allowed to lag flushes by one
2025 * transaction. In case of a crash, then on a fresh mount we must do an
2026 * incremental scan of the last committed transaction id and make sure that
2027 * all related blocks have been marked allocated.
2029 * The super-root topology and each PFS has its own transaction id domain,
2030 * so we must track PFS boundary transitions.
2032 struct hammer2_recovery_elm {
2033 TAILQ_ENTRY(hammer2_recovery_elm) entry;
2034 hammer2_chain_t *chain;
2035 hammer2_tid_t sync_tid;
2038 TAILQ_HEAD(hammer2_recovery_list, hammer2_recovery_elm);
2040 struct hammer2_recovery_info {
2041 struct hammer2_recovery_list list;
2046 static int hammer2_recovery_scan(hammer2_dev_t *hmp,
2047 hammer2_chain_t *parent,
2048 struct hammer2_recovery_info *info,
2049 hammer2_tid_t sync_tid);
2051 #define HAMMER2_RECOVERY_MAXDEPTH 10
2055 hammer2_recovery(hammer2_dev_t *hmp)
2057 struct hammer2_recovery_info info;
2058 struct hammer2_recovery_elm *elm;
2059 hammer2_chain_t *parent;
2060 hammer2_tid_t sync_tid;
2061 hammer2_tid_t mirror_tid;
2064 hammer2_trans_init(hmp->spmp, 0);
2066 sync_tid = hmp->voldata.freemap_tid;
2067 mirror_tid = hmp->voldata.mirror_tid;
2069 kprintf("hammer2 mount \"%s\": ", hmp->devrepname);
2070 if (sync_tid >= mirror_tid) {
2071 kprintf(" no recovery needed\n");
2073 kprintf(" freemap recovery %016jx-%016jx\n",
2074 sync_tid + 1, mirror_tid);
2077 TAILQ_INIT(&info.list);
2079 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
2080 error = hammer2_recovery_scan(hmp, parent, &info, sync_tid);
2081 hammer2_chain_lookup_done(parent);
2083 while ((elm = TAILQ_FIRST(&info.list)) != NULL) {
2084 TAILQ_REMOVE(&info.list, elm, entry);
2085 parent = elm->chain;
2086 sync_tid = elm->sync_tid;
2087 kfree(elm, M_HAMMER2);
2089 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2090 error |= hammer2_recovery_scan(hmp, parent, &info,
2091 hmp->voldata.freemap_tid);
2092 hammer2_chain_unlock(parent);
2093 hammer2_chain_drop(parent); /* drop elm->chain ref */
2095 hammer2_trans_done(hmp->spmp);
2102 hammer2_recovery_scan(hammer2_dev_t *hmp, hammer2_chain_t *parent,
2103 struct hammer2_recovery_info *info,
2104 hammer2_tid_t sync_tid)
2106 const hammer2_inode_data_t *ripdata;
2107 hammer2_chain_t *chain;
2108 hammer2_blockref_t bref;
2115 * Adjust freemap to ensure that the block(s) are marked allocated.
2117 if (parent->bref.type != HAMMER2_BREF_TYPE_VOLUME) {
2118 hammer2_freemap_adjust(hmp, &parent->bref,
2119 HAMMER2_FREEMAP_DORECOVER);
2123 * Check type for recursive scan
2125 switch(parent->bref.type) {
2126 case HAMMER2_BREF_TYPE_VOLUME:
2127 /* data already instantiated */
2129 case HAMMER2_BREF_TYPE_INODE:
2131 * Must instantiate data for DIRECTDATA test and also
2134 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2135 ripdata = &hammer2_chain_rdata(parent)->ipdata;
2136 if (ripdata->meta.op_flags & HAMMER2_OPFLAG_DIRECTDATA) {
2137 /* not applicable to recovery scan */
2138 hammer2_chain_unlock(parent);
2141 hammer2_chain_unlock(parent);
2143 case HAMMER2_BREF_TYPE_INDIRECT:
2145 * Must instantiate data for recursion
2147 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2148 hammer2_chain_unlock(parent);
2150 case HAMMER2_BREF_TYPE_DIRENT:
2151 case HAMMER2_BREF_TYPE_DATA:
2152 case HAMMER2_BREF_TYPE_FREEMAP:
2153 case HAMMER2_BREF_TYPE_FREEMAP_NODE:
2154 case HAMMER2_BREF_TYPE_FREEMAP_LEAF:
2155 /* not applicable to recovery scan */
2159 return HAMMER2_ERROR_BADBREF;
2163 * Defer operation if depth limit reached or if we are crossing a
2166 if (info->depth >= HAMMER2_RECOVERY_MAXDEPTH) {
2167 struct hammer2_recovery_elm *elm;
2169 elm = kmalloc(sizeof(*elm), M_HAMMER2, M_ZERO | M_WAITOK);
2170 elm->chain = parent;
2171 elm->sync_tid = sync_tid;
2172 hammer2_chain_ref(parent);
2173 TAILQ_INSERT_TAIL(&info->list, elm, entry);
2174 /* unlocked by caller */
2181 * Recursive scan of the last flushed transaction only. We are
2182 * doing this without pmp assignments so don't leave the chains
2183 * hanging around after we are done with them.
2185 * error Cumulative error this level only
2186 * rup_error Cumulative error for recursion
2187 * tmp_error Specific non-cumulative recursion error
2195 error |= hammer2_chain_scan(parent, &chain, &bref,
2197 HAMMER2_LOOKUP_NODATA);
2200 * Problem during scan or EOF
2208 if (chain == NULL) {
2209 if (bref.mirror_tid > sync_tid) {
2210 hammer2_freemap_adjust(hmp, &bref,
2211 HAMMER2_FREEMAP_DORECOVER);
2217 * This may or may not be a recursive node.
2219 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
2220 if (bref.mirror_tid > sync_tid) {
2222 tmp_error = hammer2_recovery_scan(hmp, chain,
2230 * Flush the recovery at the PFS boundary to stage it for
2231 * the final flush of the super-root topology.
2233 if (tmp_error == 0 &&
2234 (bref.flags & HAMMER2_BREF_FLAG_PFSROOT) &&
2235 (chain->flags & HAMMER2_CHAIN_ONFLUSH)) {
2236 hammer2_flush(chain, HAMMER2_FLUSH_TOP);
2238 rup_error |= tmp_error;
2240 return ((error | rup_error) & ~HAMMER2_ERROR_EOF);
2244 * Sync a mount point; this is called on a per-mount basis from the
2245 * filesystem syncer process periodically and whenever a user issues
2249 hammer2_vfs_sync(struct mount *mp, int waitfor)
2251 hammer2_xop_flush_t *xop;
2252 struct hammer2_sync_info info;
2253 hammer2_inode_t *iroot;
2261 KKASSERT(iroot->pmp == pmp);
2264 * We can't acquire locks on existing vnodes while in a transaction
2265 * without risking a deadlock. This assumes that vfsync() can be
2266 * called without the vnode locked (which it can in DragonFly).
2267 * Otherwise we'd have to implement a multi-pass or flag the lock
2268 * failures and retry.
2270 * The reclamation code interlocks with the sync list's token
2271 * (by removing the vnode from the scan list) before unlocking
2272 * the inode, giving us time to ref the inode.
2274 /*flags = VMSC_GETVP;*/
2276 if (waitfor & MNT_LAZY)
2277 flags |= VMSC_ONEPASS;
2280 * Preflush the vnodes using a normal transaction before interlocking
2281 * with a flush transaction. We do this to try to run as much of
2282 * the compression as possible outside the flush transaction.
2284 * For efficiency do an async pass before making sure with a
2285 * synchronous pass on all related buffer cache buffers.
2287 hammer2_trans_init(pmp, 0);
2289 info.waitfor = MNT_NOWAIT;
2290 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2291 info.waitfor = MNT_WAIT;
2292 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2293 hammer2_trans_done(pmp);
2296 * Start our flush transaction. This does not return until all
2297 * concurrent transactions have completed and will prevent any
2298 * new transactions from running concurrently, except for the
2299 * buffer cache transactions.
2301 * (1) vfsync() all dirty vnodes via vfsyncscan().
2303 * (2) Flush any remaining dirty inodes (the sideq), including any
2304 * which may have been created during or raced against the
2305 * vfsync(). To catch all cases this must be done after the
2308 * (3) Wait for any pending BIO I/O to complete (hammer2_bioq_sync()).
2310 * NOTE! It is still possible for the paging code to push pages
2311 * out via a UIO_NOCOPY hammer2_vop_write() during the main
2314 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH);
2317 info.waitfor = MNT_NOWAIT;
2318 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2319 info.waitfor = MNT_WAIT;
2320 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2321 hammer2_inode_run_sideq(pmp, 1);
2322 hammer2_bioq_sync(pmp);
2325 * Use the XOP interface to concurrently flush all nodes to
2326 * synchronize the PFSROOT subtopology to the media. A standard
2327 * end-of-scan ENOENT error indicates cluster sufficiency.
2329 * Note that this flush will not be visible on crash recovery until
2330 * we flush the super-root topology in the next loop.
2332 * XXX For now wait for all flushes to complete.
2335 xop = hammer2_xop_alloc(iroot, HAMMER2_XOP_MODIFYING);
2336 hammer2_xop_start(&xop->head, hammer2_inode_xop_flush);
2337 error = hammer2_xop_collect(&xop->head,
2338 HAMMER2_XOP_COLLECT_WAITALL);
2339 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
2340 if (error == HAMMER2_ERROR_ENOENT)
2343 error = hammer2_error_to_errno(error);
2347 hammer2_trans_done(pmp);
2355 * Note that we ignore the tranasction mtid we got above. Instead,
2356 * each vfsync below will ultimately get its own via TRANS_BUFCACHE
2360 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
2362 struct hammer2_sync_info *info = data;
2363 hammer2_inode_t *ip;
2367 * Degenerate cases. Note that ip == NULL typically means the
2368 * syncer vnode itself and we don't want to vclrisdirty() in that
2375 if (vp->v_type == VNON || vp->v_type == VBAD) {
2381 * VOP_FSYNC will start a new transaction so replicate some code
2382 * here to do it inline (see hammer2_vop_fsync()).
2384 * WARNING: The vfsync interacts with the buffer cache and might
2385 * block, we can't hold the inode lock at that time.
2386 * However, we MUST ref ip before blocking to ensure that
2387 * it isn't ripped out from under us (since we do not
2388 * hold a lock on the vnode).
2390 hammer2_inode_ref(ip);
2391 if ((ip->flags & HAMMER2_INODE_MODIFIED) ||
2392 !RB_EMPTY(&vp->v_rbdirty_tree)) {
2393 vfsync(vp, info->waitfor, 1, NULL, NULL);
2394 if (ip->flags & (HAMMER2_INODE_RESIZED |
2395 HAMMER2_INODE_MODIFIED)) {
2396 hammer2_inode_lock(ip, 0);
2397 if (ip->flags & (HAMMER2_INODE_RESIZED |
2398 HAMMER2_INODE_MODIFIED)) {
2399 hammer2_inode_chain_sync(ip);
2401 hammer2_inode_unlock(ip);
2404 if ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 &&
2405 RB_EMPTY(&vp->v_rbdirty_tree)) {
2409 hammer2_inode_drop(ip);
2413 info->error = error;
2420 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp)
2422 hammer2_inode_t *ip;
2424 KKASSERT(MAXFIDSZ >= 16);
2426 fhp->fid_len = offsetof(struct fid, fid_data[16]);
2428 ((hammer2_tid_t *)fhp->fid_data)[0] = ip->meta.inum;
2429 ((hammer2_tid_t *)fhp->fid_data)[1] = 0;
2436 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
2437 struct fid *fhp, struct vnode **vpp)
2444 inum = ((hammer2_tid_t *)fhp->fid_data)[0] & HAMMER2_DIRHASH_USERMSK;
2447 error = hammer2_vfs_root(mp, vpp);
2449 error = hammer2_vfs_vget(mp, NULL, inum, vpp);
2454 kprintf("fhtovp: %016jx -> %p, %d\n", inum, *vpp, error);
2460 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
2461 int *exflagsp, struct ucred **credanonp)
2468 np = vfs_export_lookup(mp, &pmp->export, nam);
2470 *exflagsp = np->netc_exflags;
2471 *credanonp = &np->netc_anon;
2480 * Support code for hammer2_vfs_mount(). Read, verify, and install the volume
2481 * header into the HMP
2483 * XXX read four volhdrs and use the one with the highest TID whos CRC
2488 * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to
2489 * nonexistant locations.
2491 * XXX Record selected volhdr and ring updates to each of 4 volhdrs
2495 hammer2_install_volume_header(hammer2_dev_t *hmp)
2497 hammer2_volume_data_t *vd;
2499 hammer2_crc32_t crc0, crc, bcrc0, bcrc;
2511 * There are up to 4 copies of the volume header (syncs iterate
2512 * between them so there is no single master). We don't trust the
2513 * volu_size field so we don't know precisely how large the filesystem
2514 * is, so depend on the OS to return an error if we go beyond the
2515 * block device's EOF.
2517 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
2518 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64,
2519 HAMMER2_VOLUME_BYTES, &bp);
2526 vd = (struct hammer2_volume_data *) bp->b_data;
2527 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) &&
2528 (vd->magic != HAMMER2_VOLUME_ID_ABO)) {
2534 if (vd->magic == HAMMER2_VOLUME_ID_ABO) {
2535 /* XXX: Reversed-endianness filesystem */
2536 kprintf("hammer2: reverse-endian filesystem detected");
2542 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0];
2543 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF,
2544 HAMMER2_VOLUME_ICRC0_SIZE);
2545 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1];
2546 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF,
2547 HAMMER2_VOLUME_ICRC1_SIZE);
2548 if ((crc0 != crc) || (bcrc0 != bcrc)) {
2549 kprintf("hammer2 volume header crc "
2550 "mismatch copy #%d %08x/%08x\n",
2557 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) {
2566 hmp->volsync = hmp->voldata;
2567 hmp->free_reserved = hmp->voldata.allocator_size / 20;
2569 if (error_reported || bootverbose || 1) { /* 1/DEBUG */
2570 kprintf("hammer2: using volume header #%d\n",
2575 kprintf("hammer2: no valid volume headers found!\n");
2581 * This handles hysteresis on regular file flushes. Because the BIOs are
2582 * routed to a thread it is possible for an excessive number to build up
2583 * and cause long front-end stalls long before the runningbuffspace limit
2584 * is hit, so we implement hammer2_flush_pipe to control the
2587 * This is a particular problem when compression is used.
2590 hammer2_lwinprog_ref(hammer2_pfs_t *pmp)
2592 atomic_add_int(&pmp->count_lwinprog, 1);
2596 hammer2_lwinprog_drop(hammer2_pfs_t *pmp)
2600 lwinprog = atomic_fetchadd_int(&pmp->count_lwinprog, -1);
2601 if ((lwinprog & HAMMER2_LWINPROG_WAITING) &&
2602 (lwinprog & HAMMER2_LWINPROG_MASK) <= hammer2_flush_pipe * 2 / 3) {
2603 atomic_clear_int(&pmp->count_lwinprog,
2604 HAMMER2_LWINPROG_WAITING);
2605 wakeup(&pmp->count_lwinprog);
2607 if ((lwinprog & HAMMER2_LWINPROG_WAITING0) &&
2608 (lwinprog & HAMMER2_LWINPROG_MASK) <= 0) {
2609 atomic_clear_int(&pmp->count_lwinprog,
2610 HAMMER2_LWINPROG_WAITING0);
2611 wakeup(&pmp->count_lwinprog);
2616 hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int flush_pipe)
2619 int lwflag = (flush_pipe) ? HAMMER2_LWINPROG_WAITING :
2620 HAMMER2_LWINPROG_WAITING0;
2623 lwinprog = pmp->count_lwinprog;
2625 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2627 tsleep_interlock(&pmp->count_lwinprog, 0);
2628 atomic_set_int(&pmp->count_lwinprog, lwflag);
2629 lwinprog = pmp->count_lwinprog;
2630 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2632 tsleep(&pmp->count_lwinprog, PINTERLOCKED, "h2wpipe", hz);
2637 * Manage excessive memory resource use for chain and related
2641 hammer2_pfs_memory_wait(hammer2_pfs_t *pmp)
2651 * Atomic check condition and wait. Also do an early speedup of
2652 * the syncer to try to avoid hitting the wait.
2655 waiting = pmp->inmem_dirty_chains;
2657 count = waiting & HAMMER2_DIRTYCHAIN_MASK;
2659 limit = pmp->mp->mnt_nvnodelistsize / 10;
2660 if (limit < hammer2_limit_dirty_chains)
2661 limit = hammer2_limit_dirty_chains;
2666 if ((int)(ticks - zzticks) > hz) {
2668 kprintf("count %ld %ld\n", count, limit);
2673 * Block if there are too many dirty chains present, wait
2674 * for the flush to clean some out.
2676 if (count > limit) {
2677 tsleep_interlock(&pmp->inmem_dirty_chains, 0);
2678 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2680 waiting | HAMMER2_DIRTYCHAIN_WAITING)) {
2681 speedup_syncer(pmp->mp);
2682 tsleep(&pmp->inmem_dirty_chains, PINTERLOCKED,
2685 continue; /* loop on success or fail */
2689 * Try to start an early flush before we are forced to block.
2691 if (count > limit * 7 / 10)
2692 speedup_syncer(pmp->mp);
2698 hammer2_pfs_memory_inc(hammer2_pfs_t *pmp)
2701 atomic_add_int(&pmp->inmem_dirty_chains, 1);
2706 hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp)
2714 waiting = pmp->inmem_dirty_chains;
2716 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2719 ~HAMMER2_DIRTYCHAIN_WAITING)) {
2724 if (waiting & HAMMER2_DIRTYCHAIN_WAITING)
2725 wakeup(&pmp->inmem_dirty_chains);
2729 * Returns 0 if the filesystem has tons of free space
2730 * Returns 1 if the filesystem has less than 10% remaining
2731 * Returns 2 if the filesystem has less than 2%/5% (user/root) remaining.
2734 hammer2_vfs_enospace(hammer2_inode_t *ip, off_t bytes, struct ucred *cred)
2738 hammer2_off_t free_reserved;
2739 hammer2_off_t free_nominal;
2744 if (pmp->free_ticks == 0 || pmp->free_ticks != ticks) {
2745 free_reserved = HAMMER2_SEGSIZE;
2746 free_nominal = 0x7FFFFFFFFFFFFFFFLLU;
2747 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
2748 hmp = pmp->pfs_hmps[i];
2751 if (pmp->pfs_types[i] != HAMMER2_PFSTYPE_MASTER &&
2752 pmp->pfs_types[i] != HAMMER2_PFSTYPE_SOFT_MASTER)
2755 if (free_nominal > hmp->voldata.allocator_free)
2756 free_nominal = hmp->voldata.allocator_free;
2757 if (free_reserved < hmp->free_reserved)
2758 free_reserved = hmp->free_reserved;
2764 pmp->free_reserved = free_reserved;
2765 pmp->free_nominal = free_nominal;
2766 pmp->free_ticks = ticks;
2768 free_reserved = pmp->free_reserved;
2769 free_nominal = pmp->free_nominal;
2771 if (cred && cred->cr_uid != 0) {
2772 if ((int64_t)(free_nominal - bytes) <
2773 (int64_t)free_reserved) {
2777 if ((int64_t)(free_nominal - bytes) <
2778 (int64_t)free_reserved / 2) {
2782 if ((int64_t)(free_nominal - bytes) < (int64_t)free_reserved * 2)
2791 hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx)
2793 hammer2_chain_t *scan;
2794 hammer2_chain_t *parent;
2798 kprintf("%*.*s...\n", tab, tab, "");
2803 kprintf("%*.*s%c-chain %p.%d %016jx/%d mir=%016jx\n",
2805 chain, chain->bref.type,
2806 chain->bref.key, chain->bref.keybits,
2807 chain->bref.mirror_tid);
2809 kprintf("%*.*s [%08x] (%s) refs=%d",
2812 ((chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
2813 chain->data) ? (char *)chain->data->ipdata.filename : "?"),
2816 parent = chain->parent;
2818 kprintf("\n%*.*s p=%p [pflags %08x prefs %d",
2820 parent, parent->flags, parent->refs);
2821 if (RB_EMPTY(&chain->core.rbtree)) {
2825 RB_FOREACH(scan, hammer2_chain_tree, &chain->core.rbtree)
2826 hammer2_dump_chain(scan, tab + 4, countp, 'a');
2827 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && chain->data)
2828 kprintf("%*.*s}(%s)\n", tab, tab, "",
2829 chain->data->ipdata.filename);
2831 kprintf("%*.*s}\n", tab, tab, "");