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 if (j == HAMMER2_MAXCLUSTER) {
458 kprintf("hammer2_mount: cluster full!\n");
459 /* XXX fatal error? */
461 KKASSERT(chain->pmp == NULL);
463 hammer2_chain_ref(chain);
464 iroot->cluster.array[j].chain = chain;
466 pmp->pfs_types[j] = HAMMER2_PFSTYPE_MASTER;
468 pmp->pfs_types[j] = ripdata->meta.pfs_type;
469 pmp->pfs_names[j] = kstrdup(ripdata->filename, M_HAMMER2);
470 pmp->pfs_hmps[j] = chain->hmp;
473 * If the PFS is already mounted we must account
474 * for the mount_count here.
477 ++chain->hmp->mount_count;
480 * May have to fixup dirty chain tracking. Previous
481 * pmp was NULL so nothing to undo.
483 if (chain->flags & HAMMER2_CHAIN_MODIFIED)
484 hammer2_pfs_memory_inc(pmp);
487 iroot->cluster.nchains = j;
490 * Update nmasters from any PFS inode which is part of the cluster.
491 * It is possible that this will result in a value which is too
492 * high. MASTER PFSs are authoritative for pfs_nmasters and will
493 * override this value later on.
495 * (This informs us of masters that might not currently be
496 * discoverable by this mount).
498 if (ripdata && pmp->pfs_nmasters < ripdata->meta.pfs_nmasters) {
499 pmp->pfs_nmasters = ripdata->meta.pfs_nmasters;
503 * Count visible masters. Masters are usually added with
504 * ripdata->meta.pfs_nmasters set to 1. This detects when there
505 * are more (XXX and must update the master inodes).
508 for (i = 0; i < iroot->cluster.nchains; ++i) {
509 if (pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER)
512 if (pmp->pfs_nmasters < count)
513 pmp->pfs_nmasters = count;
516 * Create missing synchronization and support threads.
518 * Single-node masters (including snapshots) have nothing to
519 * synchronize and do not require this thread.
521 * Multi-node masters or any number of soft masters, slaves, copy,
522 * or other PFS types need the thread.
524 * Each thread is responsible for its particular cluster index.
525 * We use independent threads so stalls or mismatches related to
526 * any given target do not affect other targets.
528 for (i = 0; i < iroot->cluster.nchains; ++i) {
530 * Single-node masters (including snapshots) have nothing
531 * to synchronize and will make direct xops support calls,
532 * thus they do not require this thread.
534 * Note that there can be thousands of snapshots. We do not
535 * want to create thousands of threads.
537 if (pmp->pfs_nmasters <= 1 &&
538 pmp->pfs_types[i] == HAMMER2_PFSTYPE_MASTER) {
543 * Sync support thread
545 if (pmp->sync_thrs[i].td == NULL) {
546 hammer2_thr_create(&pmp->sync_thrs[i], pmp, NULL,
548 hammer2_primary_sync_thread);
553 * Create missing Xop threads
555 * NOTE: We create helper threads for all mounted PFSs or any
556 * PFSs with 2+ nodes (so the sync thread can update them,
557 * even if not mounted).
559 if (pmp->mp || iroot->cluster.nchains >= 2)
560 hammer2_xop_helper_create(pmp);
562 hammer2_mtx_unlock(&iroot->lock);
563 hammer2_inode_drop(iroot);
569 * Deallocate an element of a probed PFS. If destroying and this is a
570 * MASTER, adjust nmasters.
572 * This function does not physically destroy the PFS element in its device
573 * under the super-root (see hammer2_ioctl_pfs_delete()).
576 hammer2_pfsdealloc(hammer2_pfs_t *pmp, int clindex, int destroying)
578 hammer2_inode_t *iroot;
579 hammer2_chain_t *chain;
583 * Cleanup our reference on iroot. iroot is (should) not be needed
591 * XXX flush after acquiring the iroot lock.
592 * XXX clean out the cluster index from all inode structures.
594 hammer2_thr_delete(&pmp->sync_thrs[clindex]);
597 * Remove the cluster index from the group. If destroying
598 * the PFS and this is a master, adjust pfs_nmasters.
600 hammer2_mtx_ex(&iroot->lock);
601 chain = iroot->cluster.array[clindex].chain;
602 iroot->cluster.array[clindex].chain = NULL;
604 switch(pmp->pfs_types[clindex]) {
605 case HAMMER2_PFSTYPE_MASTER:
606 if (destroying && pmp->pfs_nmasters > 0)
608 /* XXX adjust ripdata->meta.pfs_nmasters */
613 pmp->pfs_types[clindex] = HAMMER2_PFSTYPE_NONE;
615 hammer2_mtx_unlock(&iroot->lock);
621 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
622 hammer2_chain_drop(chain);
626 * Terminate all XOP threads for the cluster index.
628 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
629 hammer2_thr_delete(&pmp->xop_groups[j].thrs[clindex]);
634 * Destroy a PFS, typically only occurs after the last mount on a device
638 hammer2_pfsfree(hammer2_pfs_t *pmp)
640 hammer2_inode_t *iroot;
641 hammer2_chain_t *chain;
646 * Cleanup our reference on iroot. iroot is (should) not be needed
649 TAILQ_REMOVE(&hammer2_pfslist, pmp, mntentry);
653 for (i = 0; i < iroot->cluster.nchains; ++i) {
654 hammer2_thr_delete(&pmp->sync_thrs[i]);
655 for (j = 0; j < HAMMER2_XOPGROUPS; ++j)
656 hammer2_thr_delete(&pmp->xop_groups[j].thrs[i]);
658 #if REPORT_REFS_ERRORS
659 if (pmp->iroot->refs != 1)
660 kprintf("PMP->IROOT %p REFS WRONG %d\n",
661 pmp->iroot, pmp->iroot->refs);
663 KKASSERT(pmp->iroot->refs == 1);
665 /* ref for pmp->iroot */
666 hammer2_inode_drop(pmp->iroot);
671 * Cleanup chains remaining on LRU list.
673 while ((chain = TAILQ_FIRST(&pmp->lru_list)) != NULL) {
674 hammer2_chain_ref(chain);
675 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
676 hammer2_chain_drop(chain);
680 * Free remaining pmp resources
682 kmalloc_destroy(&pmp->mmsg);
683 kmalloc_destroy(&pmp->minode);
685 kfree(pmp, M_HAMMER2);
689 * Remove all references to hmp from the pfs list. Any PFS which becomes
690 * empty is terminated and freed.
695 hammer2_pfsfree_scan(hammer2_dev_t *hmp)
698 hammer2_inode_t *iroot;
699 hammer2_chain_t *rchain;
705 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
706 if ((iroot = pmp->iroot) == NULL)
708 if (hmp->spmp == pmp)
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 hammer2_pfsfree(pmp);
810 * If elements still remain we need to set the REMASTER
811 * flag and unfreeze it.
814 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
815 if (pmp->pfs_hmps[i] == NULL)
817 hammer2_thr_remaster(&pmp->sync_thrs[i]);
818 hammer2_thr_unfreeze(&pmp->sync_thrs[i]);
819 for (j = 0; j < HAMMER2_XOPGROUPS; ++j) {
820 hammer2_thr_remaster(
821 &pmp->xop_groups[j].thrs[i]);
822 hammer2_thr_unfreeze(
823 &pmp->xop_groups[j].thrs[i]);
831 * Mount or remount HAMMER2 fileystem from physical media
834 * mp mount point structure
840 * mp mount point structure
841 * path path to mount point
842 * data pointer to argument structure in user space
843 * volume volume path (device@LABEL form)
844 * hflags user mount flags
845 * cred user credentials
852 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
855 struct hammer2_mount_info info;
859 hammer2_dev_t *force_local;
860 hammer2_key_t key_next;
861 hammer2_key_t key_dummy;
864 struct nlookupdata nd;
865 hammer2_chain_t *parent;
866 hammer2_chain_t *chain;
867 hammer2_cluster_t *cluster;
868 const hammer2_inode_data_t *ripdata;
869 hammer2_blockref_t bref;
871 char devstr[MNAMELEN];
886 kprintf("hammer2_mount\n");
892 bzero(&info, sizeof(info));
893 info.cluster_fd = -1;
894 ksnprintf(devstr, sizeof(devstr), "%s",
895 mp->mnt_stat.f_mntfromname);
896 kprintf("hammer2_mount: root '%s'\n", devstr);
899 * Non-root mount or updating a mount
901 error = copyin(data, &info, sizeof(info));
905 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done);
911 * Extract device and label, automatically mount @BOOT, @ROOT, or @DATA
912 * if no label specified, based on the partition id. Error out if no
913 * label or device (with partition id) is specified. This is strictly
914 * a convenience to match the default label created by newfs_hammer2,
915 * our preference is that a label always be specified.
917 * NOTE: We allow 'mount @LABEL <blah>'... that is, a mount command
918 * that does not specify a device, as long as some H2 label
919 * has already been mounted from that device. This makes
920 * mounting snapshots a lot easier.
923 label = strchr(devstr, '@');
924 if (label && ((label + 1) - dev) > done)
926 if (label == NULL || label[1] == 0) {
930 label = devstr + strlen(devstr);
948 kprintf("hammer2_mount: dev=\"%s\" label=\"%s\" rdonly=%d\n",
949 dev, label, (mp->mnt_flag & MNT_RDONLY));
951 if (mp->mnt_flag & MNT_UPDATE) {
953 * Update mount. Note that pmp->iroot->cluster is
954 * an inode-embedded cluster and thus cannot be
957 * XXX HAMMER2 needs to implement NFS export via
961 pmp->hflags = info.hflags;
962 cluster = &pmp->iroot->cluster;
963 for (i = 0; i < cluster->nchains; ++i) {
964 if (cluster->array[i].chain == NULL)
966 hmp = cluster->array[i].chain->hmp;
968 error = hammer2_remount(hmp, mp, path,
980 * If a path is specified and dev is not an empty string, lookup the
981 * name and verify that it referes to a block device.
983 * If a path is specified and dev is an empty string we fall through
984 * and locate the label in the hmp search.
986 if (path && *dev != 0) {
987 error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW);
989 error = nlookup(&nd);
991 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
993 } else if (path == NULL) {
995 cdev_t cdev = kgetdiskbyname(dev);
996 error = bdevvp(cdev, &devvp);
998 kprintf("hammer2: cannot find '%s'\n", dev);
1001 * We will locate the hmp using the label in the hmp loop.
1007 * Make sure its a block device. Do not check to see if it is
1008 * already mounted until we determine that its a fresh H2 device.
1010 if (error == 0 && devvp) {
1011 vn_isdisk(devvp, &error);
1015 * Determine if the device has already been mounted. After this
1016 * check hmp will be non-NULL if we are doing the second or more
1017 * hammer2 mounts from the same device.
1019 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
1022 * Match the device. Due to the way devfs works,
1023 * we may not be able to directly match the vnode pointer,
1024 * so also check to see if the underlying device matches.
1026 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1027 if (hmp->devvp == devvp)
1029 if (devvp->v_rdev &&
1030 hmp->devvp->v_rdev == devvp->v_rdev) {
1036 * If no match this may be a fresh H2 mount, make sure
1037 * the device is not mounted on anything else.
1040 error = vfs_mountedon(devvp);
1041 } else if (error == 0) {
1043 * Match the label to a pmp already probed.
1045 TAILQ_FOREACH(pmp, &hammer2_pfslist, mntentry) {
1046 for (i = 0; i < HAMMER2_MAXCLUSTER; ++i) {
1047 if (pmp->pfs_names[i] &&
1048 strcmp(pmp->pfs_names[i], label) == 0) {
1049 hmp = pmp->pfs_hmps[i];
1061 * Open the device if this isn't a secondary mount and construct
1062 * the H2 device mount (hmp).
1065 hammer2_chain_t *schain;
1068 if (error == 0 && vcount(devvp) > 0) {
1069 kprintf("Primary device already has references\n");
1074 * Now open the device
1077 ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
1078 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1079 error = vinvalbuf(devvp, V_SAVE, 0, 0);
1081 error = VOP_OPEN(devvp,
1082 (ronly ? FREAD : FREAD | FWRITE),
1087 if (error && devvp) {
1092 lockmgr(&hammer2_mntlk, LK_RELEASE);
1095 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO);
1096 ksnprintf(hmp->devrepname, sizeof(hmp->devrepname), "%s", dev);
1099 hmp->hflags = info.hflags & HMNT2_DEVFLAGS;
1100 kmalloc_create(&hmp->mchain, "HAMMER2-chains");
1101 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry);
1102 RB_INIT(&hmp->iotree);
1103 spin_init(&hmp->io_spin, "hm2mount_io");
1104 spin_init(&hmp->list_spin, "hm2mount_list");
1105 TAILQ_INIT(&hmp->flushq);
1107 lockinit(&hmp->vollk, "h2vol", 0, 0);
1108 lockinit(&hmp->bulklk, "h2bulk", 0, 0);
1109 lockinit(&hmp->bflock, "h2bflk", 0, 0);
1112 * vchain setup. vchain.data is embedded.
1113 * vchain.refs is initialized and will never drop to 0.
1115 * NOTE! voldata is not yet loaded.
1117 hmp->vchain.hmp = hmp;
1118 hmp->vchain.refs = 1;
1119 hmp->vchain.data = (void *)&hmp->voldata;
1120 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME;
1121 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
1122 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1124 hammer2_chain_core_init(&hmp->vchain);
1125 /* hmp->vchain.u.xxx is left NULL */
1128 * fchain setup. fchain.data is embedded.
1129 * fchain.refs is initialized and will never drop to 0.
1131 * The data is not used but needs to be initialized to
1132 * pass assertion muster. We use this chain primarily
1133 * as a placeholder for the freemap's top-level RBTREE
1134 * so it does not interfere with the volume's topology
1137 hmp->fchain.hmp = hmp;
1138 hmp->fchain.refs = 1;
1139 hmp->fchain.data = (void *)&hmp->voldata.freemap_blockset;
1140 hmp->fchain.bref.type = HAMMER2_BREF_TYPE_FREEMAP;
1141 hmp->fchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
1142 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1143 hmp->fchain.bref.methods =
1144 HAMMER2_ENC_CHECK(HAMMER2_CHECK_FREEMAP) |
1145 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE);
1147 hammer2_chain_core_init(&hmp->fchain);
1148 /* hmp->fchain.u.xxx is left NULL */
1151 * Install the volume header and initialize fields from
1154 error = hammer2_install_volume_header(hmp);
1156 hammer2_unmount_helper(mp, NULL, hmp);
1157 lockmgr(&hammer2_mntlk, LK_RELEASE);
1158 hammer2_vfs_unmount(mp, MNT_FORCE);
1163 * Really important to get these right or flush will get
1166 hmp->spmp = hammer2_pfsalloc(NULL, NULL, 0, NULL);
1167 kprintf("alloc spmp %p tid %016jx\n",
1168 hmp->spmp, hmp->voldata.mirror_tid);
1172 * Dummy-up vchain and fchain's modify_tid. mirror_tid
1173 * is inherited from the volume header.
1176 hmp->vchain.bref.mirror_tid = hmp->voldata.mirror_tid;
1177 hmp->vchain.bref.modify_tid = hmp->vchain.bref.mirror_tid;
1178 hmp->vchain.pmp = spmp;
1179 hmp->fchain.bref.mirror_tid = hmp->voldata.freemap_tid;
1180 hmp->fchain.bref.modify_tid = hmp->fchain.bref.mirror_tid;
1181 hmp->fchain.pmp = spmp;
1184 * First locate the super-root inode, which is key 0
1185 * relative to the volume header's blockset.
1187 * Then locate the root inode by scanning the directory keyspace
1188 * represented by the label.
1190 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
1191 schain = hammer2_chain_lookup(&parent, &key_dummy,
1192 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY,
1194 hammer2_chain_lookup_done(parent);
1195 if (schain == NULL) {
1196 kprintf("hammer2_mount: invalid super-root\n");
1197 hammer2_unmount_helper(mp, NULL, hmp);
1198 lockmgr(&hammer2_mntlk, LK_RELEASE);
1199 hammer2_vfs_unmount(mp, MNT_FORCE);
1202 if (schain->error) {
1203 kprintf("hammer2_mount: error %s reading super-root\n",
1204 hammer2_error_str(schain->error));
1205 hammer2_chain_unlock(schain);
1206 hammer2_chain_drop(schain);
1208 hammer2_unmount_helper(mp, NULL, hmp);
1209 lockmgr(&hammer2_mntlk, LK_RELEASE);
1210 hammer2_vfs_unmount(mp, MNT_FORCE);
1215 * The super-root always uses an inode_tid of 1 when
1218 spmp->inode_tid = 1;
1219 spmp->modify_tid = schain->bref.modify_tid + 1;
1222 * Sanity-check schain's pmp and finish initialization.
1223 * Any chain belonging to the super-root topology should
1224 * have a NULL pmp (not even set to spmp).
1226 ripdata = &hammer2_chain_rdata(schain)->ipdata;
1227 KKASSERT(schain->pmp == NULL);
1228 spmp->pfs_clid = ripdata->meta.pfs_clid;
1231 * Replace the dummy spmp->iroot with a real one. It's
1232 * easier to just do a wholesale replacement than to try
1233 * to update the chain and fixup the iroot fields.
1235 * The returned inode is locked with the supplied cluster.
1237 cluster = hammer2_cluster_from_chain(schain);
1238 hammer2_inode_drop(spmp->iroot);
1240 spmp->iroot = hammer2_inode_get(spmp, NULL, cluster, -1);
1241 spmp->spmp_hmp = hmp;
1242 spmp->pfs_types[0] = ripdata->meta.pfs_type;
1243 spmp->pfs_hmps[0] = hmp;
1244 hammer2_inode_ref(spmp->iroot);
1245 hammer2_inode_unlock(spmp->iroot);
1246 hammer2_cluster_unlock(cluster);
1247 hammer2_cluster_drop(cluster);
1249 /* leave spmp->iroot with one ref */
1251 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
1252 error = hammer2_recovery(hmp);
1253 /* XXX do something with error */
1255 hammer2_update_pmps(hmp);
1256 hammer2_iocom_init(hmp);
1257 hammer2_bulkfree_init(hmp);
1260 * Ref the cluster management messaging descriptor. The mount
1261 * program deals with the other end of the communications pipe.
1263 * Root mounts typically do not supply one.
1265 if (info.cluster_fd >= 0) {
1266 fp = holdfp(curproc->p_fd, info.cluster_fd, -1);
1268 hammer2_cluster_reconnect(hmp, fp);
1270 kprintf("hammer2_mount: bad cluster_fd!\n");
1275 if (info.hflags & HMNT2_DEVFLAGS) {
1276 kprintf("hammer2: Warning: mount flags pertaining "
1277 "to the whole device may only be specified "
1278 "on the first mount of the device: %08x\n",
1279 info.hflags & HMNT2_DEVFLAGS);
1284 * Force local mount (disassociate all PFSs from their clusters).
1285 * Used primarily for debugging.
1287 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1290 * Lookup the mount point under the media-localized super-root.
1291 * Scanning hammer2_pfslist doesn't help us because it represents
1292 * PFS cluster ids which can aggregate several named PFSs together.
1294 * cluster->pmp will incorrectly point to spmp and must be fixed
1297 hammer2_inode_lock(spmp->iroot, 0);
1298 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1299 lhc = hammer2_dirhash(label, strlen(label));
1300 chain = hammer2_chain_lookup(&parent, &key_next,
1301 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1304 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1305 strcmp(label, chain->data->ipdata.filename) == 0) {
1308 chain = hammer2_chain_next(&parent, chain, &key_next,
1310 lhc + HAMMER2_DIRHASH_LOMASK,
1314 hammer2_chain_unlock(parent);
1315 hammer2_chain_drop(parent);
1317 hammer2_inode_unlock(spmp->iroot);
1320 * PFS could not be found?
1322 if (chain == NULL) {
1324 kprintf("hammer2_mount: PFS label I/O error\n");
1326 kprintf("hammer2_mount: PFS label not found\n");
1327 hammer2_unmount_helper(mp, NULL, hmp);
1328 lockmgr(&hammer2_mntlk, LK_RELEASE);
1329 hammer2_vfs_unmount(mp, MNT_FORCE);
1335 * Acquire the pmp structure (it should have already been allocated
1336 * via hammer2_update_pmps() so do not pass cluster in to add to
1337 * available chains).
1339 * Check if the cluster has already been mounted. A cluster can
1340 * only be mounted once, use null mounts to mount additional copies.
1343 kprintf("hammer2_mount: PFS label I/O error\n");
1345 ripdata = &chain->data->ipdata;
1347 pmp = hammer2_pfsalloc(NULL, ripdata,
1348 bref.modify_tid, force_local);
1350 hammer2_chain_unlock(chain);
1351 hammer2_chain_drop(chain);
1356 kprintf("hammer2_mount hmp=%p pmp=%p\n", hmp, pmp);
1359 kprintf("hammer2_mount: PFS already mounted!\n");
1360 hammer2_unmount_helper(mp, NULL, hmp);
1361 lockmgr(&hammer2_mntlk, LK_RELEASE);
1362 hammer2_vfs_unmount(mp, MNT_FORCE);
1367 pmp->hflags = info.hflags;
1368 mp->mnt_flag |= MNT_LOCAL;
1369 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */
1370 mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
1373 * required mount structure initializations
1375 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE;
1376 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE;
1378 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE;
1379 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1384 mp->mnt_iosize_max = MAXPHYS;
1387 * Connect up mount pointers.
1389 hammer2_mount_helper(mp, pmp);
1391 lockmgr(&hammer2_mntlk, LK_RELEASE);
1397 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops);
1398 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops);
1399 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops);
1402 copyinstr(info.volume, mp->mnt_stat.f_mntfromname,
1403 MNAMELEN - 1, &size);
1404 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
1405 } /* else root mount, already in there */
1407 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname));
1409 copyinstr(path, mp->mnt_stat.f_mntonname,
1410 sizeof(mp->mnt_stat.f_mntonname) - 1,
1414 mp->mnt_stat.f_mntonname[0] = '/';
1418 * Initial statfs to prime mnt_stat.
1420 hammer2_vfs_statfs(mp, &mp->mnt_stat, cred);
1426 * Scan PFSs under the super-root and create hammer2_pfs structures.
1430 hammer2_update_pmps(hammer2_dev_t *hmp)
1432 const hammer2_inode_data_t *ripdata;
1433 hammer2_chain_t *parent;
1434 hammer2_chain_t *chain;
1435 hammer2_blockref_t bref;
1436 hammer2_dev_t *force_local;
1437 hammer2_pfs_t *spmp;
1439 hammer2_key_t key_next;
1443 * Force local mount (disassociate all PFSs from their clusters).
1444 * Used primarily for debugging.
1446 force_local = (hmp->hflags & HMNT2_LOCAL) ? hmp : NULL;
1449 * Lookup mount point under the media-localized super-root.
1451 * cluster->pmp will incorrectly point to spmp and must be fixed
1455 hammer2_inode_lock(spmp->iroot, 0);
1456 parent = hammer2_inode_chain(spmp->iroot, 0, HAMMER2_RESOLVE_ALWAYS);
1457 chain = hammer2_chain_lookup(&parent, &key_next,
1458 HAMMER2_KEY_MIN, HAMMER2_KEY_MAX,
1461 if (chain->bref.type != HAMMER2_BREF_TYPE_INODE)
1464 kprintf("I/O error scanning PFS labels\n");
1466 ripdata = &chain->data->ipdata;
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 /* scrapping hmp now may invalidate the pmp */
1644 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
1645 if (hmp->mount_count == 0) {
1646 hammer2_unmount_helper(NULL, NULL, hmp);
1654 * Try to terminate the block device. We can't terminate it if
1655 * there are still PFSs referencing it.
1657 if (hmp->mount_count)
1661 * Decomission the network before we start messing with the
1664 hammer2_iocom_uninit(hmp);
1666 hammer2_bulkfree_uninit(hmp);
1667 hammer2_pfsfree_scan(hmp);
1668 hammer2_dev_exlock(hmp); /* XXX order */
1671 * Cycle the volume data lock as a safety (probably not needed any
1672 * more). To ensure everything is out we need to flush at least
1673 * three times. (1) The running of the sideq can dirty the
1674 * filesystem, (2) A normal flush can dirty the freemap, and
1675 * (3) ensure that the freemap is fully synchronized.
1677 * The next mount's recovery scan can clean everything up but we want
1678 * to leave the filesystem in a 100% clean state on a normal unmount.
1681 hammer2_voldata_lock(hmp);
1682 hammer2_voldata_unlock(hmp);
1685 if ((hmp->vchain.flags | hmp->fchain.flags) &
1686 HAMMER2_CHAIN_FLUSH_MASK) {
1687 kprintf("hammer2_unmount: chains left over "
1688 "after final sync\n");
1689 kprintf(" vchain %08x\n", hmp->vchain.flags);
1690 kprintf(" fchain %08x\n", hmp->fchain.flags);
1692 if (hammer2_debug & 0x0010)
1693 Debugger("entered debugger");
1696 KKASSERT(hmp->spmp == NULL);
1699 * Finish up with the device vnode
1701 if ((devvp = hmp->devvp) != NULL) {
1703 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1704 kprintf("hammer2_unmount(A): devvp %s rbdirty %p ronly=%d\n",
1705 hmp->devrepname, RB_ROOT(&devvp->v_rbdirty_tree),
1707 vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0);
1708 kprintf("hammer2_unmount(B): devvp %s rbdirty %p\n",
1709 hmp->devrepname, RB_ROOT(&devvp->v_rbdirty_tree));
1711 VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE), NULL);
1718 * Clear vchain/fchain flags that might prevent final cleanup
1721 if (hmp->vchain.flags & HAMMER2_CHAIN_MODIFIED) {
1722 atomic_add_long(&hammer2_count_modified_chains, -1);
1723 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_MODIFIED);
1724 hammer2_pfs_memory_wakeup(hmp->vchain.pmp);
1726 if (hmp->vchain.flags & HAMMER2_CHAIN_UPDATE) {
1727 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_UPDATE);
1730 if (hmp->fchain.flags & HAMMER2_CHAIN_MODIFIED) {
1731 atomic_add_long(&hammer2_count_modified_chains, -1);
1732 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_MODIFIED);
1733 hammer2_pfs_memory_wakeup(hmp->fchain.pmp);
1735 if (hmp->fchain.flags & HAMMER2_CHAIN_UPDATE) {
1736 atomic_clear_int(&hmp->fchain.flags, HAMMER2_CHAIN_UPDATE);
1740 * Final drop of embedded freemap root chain to
1741 * clean up fchain.core (fchain structure is not
1742 * flagged ALLOCATED so it is cleaned out and then
1745 hammer2_chain_drop(&hmp->fchain);
1748 * Final drop of embedded volume root chain to clean
1749 * up vchain.core (vchain structure is not flagged
1750 * ALLOCATED so it is cleaned out and then left to
1754 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt, 'v');
1756 hammer2_dump_chain(&hmp->fchain, 0, &dumpcnt, 'f');
1757 hammer2_dev_unlock(hmp);
1758 hammer2_chain_drop(&hmp->vchain);
1760 hammer2_io_cleanup(hmp, &hmp->iotree);
1761 if (hmp->iofree_count) {
1762 kprintf("io_cleanup: %d I/O's left hanging\n",
1766 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry);
1767 kmalloc_destroy(&hmp->mchain);
1768 kfree(hmp, M_HAMMER2);
1772 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp,
1773 ino_t ino, struct vnode **vpp)
1775 hammer2_xop_lookup_t *xop;
1777 hammer2_inode_t *ip;
1781 inum = (hammer2_tid_t)ino & HAMMER2_DIRHASH_USERMSK;
1787 * Easy if we already have it cached
1789 ip = hammer2_inode_lookup(pmp, inum);
1791 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED);
1792 *vpp = hammer2_igetv(ip, &error);
1793 hammer2_inode_unlock(ip);
1794 hammer2_inode_drop(ip); /* from lookup */
1800 * Otherwise we have to find the inode
1802 xop = hammer2_xop_alloc(pmp->iroot, 0);
1804 hammer2_xop_start(&xop->head, hammer2_xop_lookup);
1805 error = hammer2_xop_collect(&xop->head, 0);
1808 if (hammer2_cluster_rdata(&xop->head.cluster) == NULL) {
1809 kprintf("vget: no collect error but also no rdata\n");
1810 kprintf("xop %p\n", xop);
1811 while ((hammer2_debug & 0x80000) == 0) {
1812 tsleep(xop, PCATCH, "wait", hz * 10);
1816 ip = hammer2_inode_get(pmp, NULL, &xop->head.cluster, -1);
1819 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1822 *vpp = hammer2_igetv(ip, &error);
1823 hammer2_inode_unlock(ip);
1833 hammer2_vfs_root(struct mount *mp, struct vnode **vpp)
1840 if (pmp->iroot == NULL) {
1846 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1848 while (pmp->inode_tid == 0) {
1849 hammer2_xop_ipcluster_t *xop;
1850 hammer2_inode_meta_t *meta;
1852 xop = hammer2_xop_alloc(pmp->iroot, HAMMER2_XOP_MODIFYING);
1853 hammer2_xop_start(&xop->head, hammer2_xop_ipcluster);
1854 error = hammer2_xop_collect(&xop->head, 0);
1857 meta = &xop->head.cluster.focus->data->ipdata.meta;
1858 pmp->iroot->meta = *meta;
1859 pmp->inode_tid = meta->pfs_inum + 1;
1860 if (pmp->inode_tid < HAMMER2_INODE_START)
1861 pmp->inode_tid = HAMMER2_INODE_START;
1863 xop->head.cluster.focus->bref.modify_tid + 1;
1864 kprintf("PFS: Starting inode %jd\n",
1865 (intmax_t)pmp->inode_tid);
1866 kprintf("PMP focus good set nextino=%ld mod=%016jx\n",
1867 pmp->inode_tid, pmp->modify_tid);
1868 wakeup(&pmp->iroot);
1870 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1873 * Prime the mount info.
1875 hammer2_vfs_statfs(mp, &mp->mnt_stat, NULL);
1882 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
1883 hammer2_inode_unlock(pmp->iroot);
1884 error = tsleep(&pmp->iroot, PCATCH, "h2root", hz);
1885 hammer2_inode_lock(pmp->iroot, HAMMER2_RESOLVE_SHARED);
1891 hammer2_inode_unlock(pmp->iroot);
1894 vp = hammer2_igetv(pmp->iroot, &error);
1895 hammer2_inode_unlock(pmp->iroot);
1905 * XXX incorporate ipdata->meta.inode_quota and data_quota
1909 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
1913 hammer2_blockref_t bref;
1917 * NOTE: iroot might not have validated the cluster yet.
1921 mp->mnt_stat.f_files = 0;
1922 mp->mnt_stat.f_ffree = 0;
1923 mp->mnt_stat.f_blocks = 0;
1924 mp->mnt_stat.f_bfree = 0;
1925 mp->mnt_stat.f_bavail = 0;
1927 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1928 hmp = pmp->pfs_hmps[i];
1931 if (pmp->iroot->cluster.array[i].chain)
1932 bref = pmp->iroot->cluster.array[i].chain->bref;
1934 bzero(&bref, sizeof(bref));
1936 mp->mnt_stat.f_files = bref.embed.stats.inode_count;
1937 mp->mnt_stat.f_ffree = 0;
1938 mp->mnt_stat.f_blocks = hmp->voldata.allocator_size /
1939 mp->mnt_vstat.f_bsize;
1940 mp->mnt_stat.f_bfree = hmp->voldata.allocator_free /
1941 mp->mnt_vstat.f_bsize;
1942 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
1944 if (cred && cred->cr_uid != 0) {
1948 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize;
1949 mp->mnt_stat.f_blocks -= adj;
1950 mp->mnt_stat.f_bfree -= adj;
1951 mp->mnt_stat.f_bavail -= adj;
1954 *sbp = mp->mnt_stat;
1961 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
1965 hammer2_blockref_t bref;
1969 * NOTE: iroot might not have validated the cluster yet.
1973 mp->mnt_vstat.f_bsize = 0;
1974 mp->mnt_vstat.f_files = 0;
1975 mp->mnt_vstat.f_ffree = 0;
1976 mp->mnt_vstat.f_blocks = 0;
1977 mp->mnt_vstat.f_bfree = 0;
1978 mp->mnt_vstat.f_bavail = 0;
1980 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
1981 hmp = pmp->pfs_hmps[i];
1984 if (pmp->iroot->cluster.array[i].chain)
1985 bref = pmp->iroot->cluster.array[i].chain->bref;
1987 bzero(&bref, sizeof(bref));
1989 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
1990 mp->mnt_vstat.f_files = bref.embed.stats.inode_count;
1991 mp->mnt_vstat.f_ffree = 0;
1992 mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size /
1993 mp->mnt_vstat.f_bsize;
1994 mp->mnt_vstat.f_bfree = hmp->voldata.allocator_free /
1995 mp->mnt_vstat.f_bsize;
1996 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree;
1998 if (cred && cred->cr_uid != 0) {
2002 adj = hmp->free_reserved / mp->mnt_vstat.f_bsize;
2003 mp->mnt_vstat.f_blocks -= adj;
2004 mp->mnt_vstat.f_bfree -= adj;
2005 mp->mnt_vstat.f_bavail -= adj;
2008 *sbp = mp->mnt_vstat;
2014 * Mount-time recovery (RW mounts)
2016 * Updates to the free block table are allowed to lag flushes by one
2017 * transaction. In case of a crash, then on a fresh mount we must do an
2018 * incremental scan of the last committed transaction id and make sure that
2019 * all related blocks have been marked allocated.
2021 * The super-root topology and each PFS has its own transaction id domain,
2022 * so we must track PFS boundary transitions.
2024 struct hammer2_recovery_elm {
2025 TAILQ_ENTRY(hammer2_recovery_elm) entry;
2026 hammer2_chain_t *chain;
2027 hammer2_tid_t sync_tid;
2030 TAILQ_HEAD(hammer2_recovery_list, hammer2_recovery_elm);
2032 struct hammer2_recovery_info {
2033 struct hammer2_recovery_list list;
2038 static int hammer2_recovery_scan(hammer2_dev_t *hmp,
2039 hammer2_chain_t *parent,
2040 struct hammer2_recovery_info *info,
2041 hammer2_tid_t sync_tid);
2043 #define HAMMER2_RECOVERY_MAXDEPTH 10
2047 hammer2_recovery(hammer2_dev_t *hmp)
2049 struct hammer2_recovery_info info;
2050 struct hammer2_recovery_elm *elm;
2051 hammer2_chain_t *parent;
2052 hammer2_tid_t sync_tid;
2053 hammer2_tid_t mirror_tid;
2056 hammer2_trans_init(hmp->spmp, 0);
2058 sync_tid = hmp->voldata.freemap_tid;
2059 mirror_tid = hmp->voldata.mirror_tid;
2061 kprintf("hammer2 mount \"%s\": ", hmp->devrepname);
2062 if (sync_tid >= mirror_tid) {
2063 kprintf(" no recovery needed\n");
2065 kprintf(" freemap recovery %016jx-%016jx\n",
2066 sync_tid + 1, mirror_tid);
2069 TAILQ_INIT(&info.list);
2071 parent = hammer2_chain_lookup_init(&hmp->vchain, 0);
2072 error = hammer2_recovery_scan(hmp, parent, &info, sync_tid);
2073 hammer2_chain_lookup_done(parent);
2075 while ((elm = TAILQ_FIRST(&info.list)) != NULL) {
2076 TAILQ_REMOVE(&info.list, elm, entry);
2077 parent = elm->chain;
2078 sync_tid = elm->sync_tid;
2079 kfree(elm, M_HAMMER2);
2081 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2082 error |= hammer2_recovery_scan(hmp, parent, &info,
2083 hmp->voldata.freemap_tid);
2084 hammer2_chain_unlock(parent);
2085 hammer2_chain_drop(parent); /* drop elm->chain ref */
2087 hammer2_trans_done(hmp->spmp);
2094 hammer2_recovery_scan(hammer2_dev_t *hmp, hammer2_chain_t *parent,
2095 struct hammer2_recovery_info *info,
2096 hammer2_tid_t sync_tid)
2098 const hammer2_inode_data_t *ripdata;
2099 hammer2_chain_t *chain;
2100 hammer2_blockref_t bref;
2107 * Adjust freemap to ensure that the block(s) are marked allocated.
2109 if (parent->bref.type != HAMMER2_BREF_TYPE_VOLUME) {
2110 hammer2_freemap_adjust(hmp, &parent->bref,
2111 HAMMER2_FREEMAP_DORECOVER);
2115 * Check type for recursive scan
2117 switch(parent->bref.type) {
2118 case HAMMER2_BREF_TYPE_VOLUME:
2119 /* data already instantiated */
2121 case HAMMER2_BREF_TYPE_INODE:
2123 * Must instantiate data for DIRECTDATA test and also
2126 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2127 ripdata = &hammer2_chain_rdata(parent)->ipdata;
2128 if (ripdata->meta.op_flags & HAMMER2_OPFLAG_DIRECTDATA) {
2129 /* not applicable to recovery scan */
2130 hammer2_chain_unlock(parent);
2133 hammer2_chain_unlock(parent);
2135 case HAMMER2_BREF_TYPE_INDIRECT:
2137 * Must instantiate data for recursion
2139 hammer2_chain_lock(parent, HAMMER2_RESOLVE_ALWAYS);
2140 hammer2_chain_unlock(parent);
2142 case HAMMER2_BREF_TYPE_DIRENT:
2143 case HAMMER2_BREF_TYPE_DATA:
2144 case HAMMER2_BREF_TYPE_FREEMAP:
2145 case HAMMER2_BREF_TYPE_FREEMAP_NODE:
2146 case HAMMER2_BREF_TYPE_FREEMAP_LEAF:
2147 /* not applicable to recovery scan */
2151 return HAMMER2_ERROR_BADBREF;
2155 * Defer operation if depth limit reached or if we are crossing a
2158 if (info->depth >= HAMMER2_RECOVERY_MAXDEPTH) {
2159 struct hammer2_recovery_elm *elm;
2161 elm = kmalloc(sizeof(*elm), M_HAMMER2, M_ZERO | M_WAITOK);
2162 elm->chain = parent;
2163 elm->sync_tid = sync_tid;
2164 hammer2_chain_ref(parent);
2165 TAILQ_INSERT_TAIL(&info->list, elm, entry);
2166 /* unlocked by caller */
2173 * Recursive scan of the last flushed transaction only. We are
2174 * doing this without pmp assignments so don't leave the chains
2175 * hanging around after we are done with them.
2177 * error Cumulative error this level only
2178 * rup_error Cumulative error for recursion
2179 * tmp_error Specific non-cumulative recursion error
2187 error |= hammer2_chain_scan(parent, &chain, &bref,
2189 HAMMER2_LOOKUP_NODATA);
2192 * Problem during scan or EOF
2200 if (chain == NULL) {
2201 if (bref.mirror_tid > sync_tid) {
2202 hammer2_freemap_adjust(hmp, &bref,
2203 HAMMER2_FREEMAP_DORECOVER);
2209 * This may or may not be a recursive node.
2211 atomic_set_int(&chain->flags, HAMMER2_CHAIN_RELEASE);
2212 if (bref.mirror_tid > sync_tid) {
2214 tmp_error = hammer2_recovery_scan(hmp, chain,
2222 * Flush the recovery at the PFS boundary to stage it for
2223 * the final flush of the super-root topology.
2225 if (tmp_error == 0 &&
2226 (bref.flags & HAMMER2_BREF_FLAG_PFSROOT) &&
2227 (chain->flags & HAMMER2_CHAIN_ONFLUSH)) {
2228 hammer2_flush(chain, HAMMER2_FLUSH_TOP);
2230 rup_error |= tmp_error;
2232 return ((error | rup_error) & ~HAMMER2_ERROR_EOF);
2236 * Sync a mount point; this is called on a per-mount basis from the
2237 * filesystem syncer process periodically and whenever a user issues
2241 hammer2_vfs_sync(struct mount *mp, int waitfor)
2243 hammer2_xop_flush_t *xop;
2244 struct hammer2_sync_info info;
2245 hammer2_inode_t *iroot;
2253 KKASSERT(iroot->pmp == pmp);
2256 * We can't acquire locks on existing vnodes while in a transaction
2257 * without risking a deadlock. This assumes that vfsync() can be
2258 * called without the vnode locked (which it can in DragonFly).
2259 * Otherwise we'd have to implement a multi-pass or flag the lock
2260 * failures and retry.
2262 * The reclamation code interlocks with the sync list's token
2263 * (by removing the vnode from the scan list) before unlocking
2264 * the inode, giving us time to ref the inode.
2266 /*flags = VMSC_GETVP;*/
2268 if (waitfor & MNT_LAZY)
2269 flags |= VMSC_ONEPASS;
2272 * Preflush the vnodes using a normal transaction before interlocking
2273 * with a flush transaction. We do this to try to run as much of
2274 * the compression as possible outside the flush transaction.
2276 * For efficiency do an async pass before making sure with a
2277 * synchronous pass on all related buffer cache buffers.
2279 hammer2_trans_init(pmp, 0);
2281 info.waitfor = MNT_NOWAIT;
2282 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2283 info.waitfor = MNT_WAIT;
2284 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2285 hammer2_trans_done(pmp);
2288 * Start our flush transaction. This does not return until all
2289 * concurrent transactions have completed and will prevent any
2290 * new transactions from running concurrently, except for the
2291 * buffer cache transactions.
2293 * (1) vfsync() all dirty vnodes via vfsyncscan().
2295 * (2) Flush any remaining dirty inodes (the sideq), including any
2296 * which may have been created during or raced against the
2297 * vfsync(). To catch all cases this must be done after the
2300 * (3) Wait for any pending BIO I/O to complete (hammer2_bioq_sync()).
2302 * NOTE! It is still possible for the paging code to push pages
2303 * out via a UIO_NOCOPY hammer2_vop_write() during the main
2306 hammer2_trans_init(pmp, HAMMER2_TRANS_ISFLUSH);
2309 info.waitfor = MNT_NOWAIT;
2310 vsyncscan(mp, flags | VMSC_NOWAIT, hammer2_sync_scan2, &info);
2311 info.waitfor = MNT_WAIT;
2312 vsyncscan(mp, flags, hammer2_sync_scan2, &info);
2313 hammer2_inode_run_sideq(pmp, 1);
2314 hammer2_bioq_sync(pmp);
2317 * Use the XOP interface to concurrently flush all nodes to
2318 * synchronize the PFSROOT subtopology to the media. A standard
2319 * end-of-scan ENOENT error indicates cluster sufficiency.
2321 * Note that this flush will not be visible on crash recovery until
2322 * we flush the super-root topology in the next loop.
2324 * XXX For now wait for all flushes to complete.
2327 xop = hammer2_xop_alloc(iroot, HAMMER2_XOP_MODIFYING);
2328 hammer2_xop_start(&xop->head, hammer2_inode_xop_flush);
2329 error = hammer2_xop_collect(&xop->head,
2330 HAMMER2_XOP_COLLECT_WAITALL);
2331 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
2332 if (error == HAMMER2_ERROR_ENOENT)
2335 error = hammer2_error_to_errno(error);
2339 hammer2_trans_done(pmp);
2347 * Note that we ignore the tranasction mtid we got above. Instead,
2348 * each vfsync below will ultimately get its own via TRANS_BUFCACHE
2352 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
2354 struct hammer2_sync_info *info = data;
2355 hammer2_inode_t *ip;
2359 * Degenerate cases. Note that ip == NULL typically means the
2360 * syncer vnode itself and we don't want to vclrisdirty() in that
2367 if (vp->v_type == VNON || vp->v_type == VBAD) {
2373 * VOP_FSYNC will start a new transaction so replicate some code
2374 * here to do it inline (see hammer2_vop_fsync()).
2376 * WARNING: The vfsync interacts with the buffer cache and might
2377 * block, we can't hold the inode lock at that time.
2378 * However, we MUST ref ip before blocking to ensure that
2379 * it isn't ripped out from under us (since we do not
2380 * hold a lock on the vnode).
2382 hammer2_inode_ref(ip);
2383 if ((ip->flags & HAMMER2_INODE_MODIFIED) ||
2384 !RB_EMPTY(&vp->v_rbdirty_tree)) {
2385 vfsync(vp, info->waitfor, 1, NULL, NULL);
2386 if (ip->flags & (HAMMER2_INODE_RESIZED |
2387 HAMMER2_INODE_MODIFIED)) {
2388 hammer2_inode_lock(ip, 0);
2389 if (ip->flags & (HAMMER2_INODE_RESIZED |
2390 HAMMER2_INODE_MODIFIED)) {
2391 hammer2_inode_chain_sync(ip);
2393 hammer2_inode_unlock(ip);
2396 if ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 &&
2397 RB_EMPTY(&vp->v_rbdirty_tree)) {
2401 hammer2_inode_drop(ip);
2405 info->error = error;
2412 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp)
2414 hammer2_inode_t *ip;
2416 KKASSERT(MAXFIDSZ >= 16);
2418 fhp->fid_len = offsetof(struct fid, fid_data[16]);
2420 ((hammer2_tid_t *)fhp->fid_data)[0] = ip->meta.inum;
2421 ((hammer2_tid_t *)fhp->fid_data)[1] = 0;
2428 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
2429 struct fid *fhp, struct vnode **vpp)
2436 inum = ((hammer2_tid_t *)fhp->fid_data)[0] & HAMMER2_DIRHASH_USERMSK;
2439 error = hammer2_vfs_root(mp, vpp);
2441 error = hammer2_vfs_vget(mp, NULL, inum, vpp);
2446 kprintf("fhtovp: %016jx -> %p, %d\n", inum, *vpp, error);
2452 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
2453 int *exflagsp, struct ucred **credanonp)
2460 np = vfs_export_lookup(mp, &pmp->export, nam);
2462 *exflagsp = np->netc_exflags;
2463 *credanonp = &np->netc_anon;
2472 * Support code for hammer2_vfs_mount(). Read, verify, and install the volume
2473 * header into the HMP
2475 * XXX read four volhdrs and use the one with the highest TID whos CRC
2480 * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to
2481 * nonexistant locations.
2483 * XXX Record selected volhdr and ring updates to each of 4 volhdrs
2487 hammer2_install_volume_header(hammer2_dev_t *hmp)
2489 hammer2_volume_data_t *vd;
2491 hammer2_crc32_t crc0, crc, bcrc0, bcrc;
2503 * There are up to 4 copies of the volume header (syncs iterate
2504 * between them so there is no single master). We don't trust the
2505 * volu_size field so we don't know precisely how large the filesystem
2506 * is, so depend on the OS to return an error if we go beyond the
2507 * block device's EOF.
2509 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
2510 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64,
2511 HAMMER2_VOLUME_BYTES, &bp);
2518 vd = (struct hammer2_volume_data *) bp->b_data;
2519 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) &&
2520 (vd->magic != HAMMER2_VOLUME_ID_ABO)) {
2526 if (vd->magic == HAMMER2_VOLUME_ID_ABO) {
2527 /* XXX: Reversed-endianness filesystem */
2528 kprintf("hammer2: reverse-endian filesystem detected");
2534 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0];
2535 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF,
2536 HAMMER2_VOLUME_ICRC0_SIZE);
2537 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1];
2538 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF,
2539 HAMMER2_VOLUME_ICRC1_SIZE);
2540 if ((crc0 != crc) || (bcrc0 != bcrc)) {
2541 kprintf("hammer2 volume header crc "
2542 "mismatch copy #%d %08x/%08x\n",
2549 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) {
2558 hmp->volsync = hmp->voldata;
2559 hmp->free_reserved = hmp->voldata.allocator_size / 20;
2561 if (error_reported || bootverbose || 1) { /* 1/DEBUG */
2562 kprintf("hammer2: using volume header #%d\n",
2567 kprintf("hammer2: no valid volume headers found!\n");
2573 * This handles hysteresis on regular file flushes. Because the BIOs are
2574 * routed to a thread it is possible for an excessive number to build up
2575 * and cause long front-end stalls long before the runningbuffspace limit
2576 * is hit, so we implement hammer2_flush_pipe to control the
2579 * This is a particular problem when compression is used.
2582 hammer2_lwinprog_ref(hammer2_pfs_t *pmp)
2584 atomic_add_int(&pmp->count_lwinprog, 1);
2588 hammer2_lwinprog_drop(hammer2_pfs_t *pmp)
2592 lwinprog = atomic_fetchadd_int(&pmp->count_lwinprog, -1);
2593 if ((lwinprog & HAMMER2_LWINPROG_WAITING) &&
2594 (lwinprog & HAMMER2_LWINPROG_MASK) <= hammer2_flush_pipe * 2 / 3) {
2595 atomic_clear_int(&pmp->count_lwinprog,
2596 HAMMER2_LWINPROG_WAITING);
2597 wakeup(&pmp->count_lwinprog);
2599 if ((lwinprog & HAMMER2_LWINPROG_WAITING0) &&
2600 (lwinprog & HAMMER2_LWINPROG_MASK) <= 0) {
2601 atomic_clear_int(&pmp->count_lwinprog,
2602 HAMMER2_LWINPROG_WAITING0);
2603 wakeup(&pmp->count_lwinprog);
2608 hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int flush_pipe)
2611 int lwflag = (flush_pipe) ? HAMMER2_LWINPROG_WAITING :
2612 HAMMER2_LWINPROG_WAITING0;
2615 lwinprog = pmp->count_lwinprog;
2617 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2619 tsleep_interlock(&pmp->count_lwinprog, 0);
2620 atomic_set_int(&pmp->count_lwinprog, lwflag);
2621 lwinprog = pmp->count_lwinprog;
2622 if ((lwinprog & HAMMER2_LWINPROG_MASK) <= flush_pipe)
2624 tsleep(&pmp->count_lwinprog, PINTERLOCKED, "h2wpipe", hz);
2629 * Manage excessive memory resource use for chain and related
2633 hammer2_pfs_memory_wait(hammer2_pfs_t *pmp)
2643 * Atomic check condition and wait. Also do an early speedup of
2644 * the syncer to try to avoid hitting the wait.
2647 waiting = pmp->inmem_dirty_chains;
2649 count = waiting & HAMMER2_DIRTYCHAIN_MASK;
2651 limit = pmp->mp->mnt_nvnodelistsize / 10;
2652 if (limit < hammer2_limit_dirty_chains)
2653 limit = hammer2_limit_dirty_chains;
2658 if ((int)(ticks - zzticks) > hz) {
2660 kprintf("count %ld %ld\n", count, limit);
2665 * Block if there are too many dirty chains present, wait
2666 * for the flush to clean some out.
2668 if (count > limit) {
2669 tsleep_interlock(&pmp->inmem_dirty_chains, 0);
2670 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2672 waiting | HAMMER2_DIRTYCHAIN_WAITING)) {
2673 speedup_syncer(pmp->mp);
2674 tsleep(&pmp->inmem_dirty_chains, PINTERLOCKED,
2677 continue; /* loop on success or fail */
2681 * Try to start an early flush before we are forced to block.
2683 if (count > limit * 7 / 10)
2684 speedup_syncer(pmp->mp);
2690 hammer2_pfs_memory_inc(hammer2_pfs_t *pmp)
2693 atomic_add_int(&pmp->inmem_dirty_chains, 1);
2698 hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp)
2706 waiting = pmp->inmem_dirty_chains;
2708 if (atomic_cmpset_int(&pmp->inmem_dirty_chains,
2711 ~HAMMER2_DIRTYCHAIN_WAITING)) {
2716 if (waiting & HAMMER2_DIRTYCHAIN_WAITING)
2717 wakeup(&pmp->inmem_dirty_chains);
2721 * Returns 0 if the filesystem has tons of free space
2722 * Returns 1 if the filesystem has less than 10% remaining
2723 * Returns 2 if the filesystem has less than 2%/5% (user/root) remaining.
2726 hammer2_vfs_enospace(hammer2_inode_t *ip, off_t bytes, struct ucred *cred)
2730 hammer2_off_t free_reserved;
2731 hammer2_off_t free_nominal;
2736 if (pmp->free_ticks == 0 || pmp->free_ticks != ticks) {
2737 free_reserved = HAMMER2_SEGSIZE;
2738 free_nominal = 0x7FFFFFFFFFFFFFFFLLU;
2739 for (i = 0; i < pmp->iroot->cluster.nchains; ++i) {
2740 hmp = pmp->pfs_hmps[i];
2743 if (pmp->pfs_types[i] != HAMMER2_PFSTYPE_MASTER &&
2744 pmp->pfs_types[i] != HAMMER2_PFSTYPE_SOFT_MASTER)
2747 if (free_nominal > hmp->voldata.allocator_free)
2748 free_nominal = hmp->voldata.allocator_free;
2749 if (free_reserved < hmp->free_reserved)
2750 free_reserved = hmp->free_reserved;
2756 pmp->free_reserved = free_reserved;
2757 pmp->free_nominal = free_nominal;
2758 pmp->free_ticks = ticks;
2760 free_reserved = pmp->free_reserved;
2761 free_nominal = pmp->free_nominal;
2763 if (cred && cred->cr_uid != 0) {
2764 if ((int64_t)(free_nominal - bytes) <
2765 (int64_t)free_reserved) {
2769 if ((int64_t)(free_nominal - bytes) <
2770 (int64_t)free_reserved / 2) {
2774 if ((int64_t)(free_nominal - bytes) < (int64_t)free_reserved * 2)
2783 hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx)
2785 hammer2_chain_t *scan;
2786 hammer2_chain_t *parent;
2790 kprintf("%*.*s...\n", tab, tab, "");
2795 kprintf("%*.*s%c-chain %p.%d %016jx/%d mir=%016jx\n",
2797 chain, chain->bref.type,
2798 chain->bref.key, chain->bref.keybits,
2799 chain->bref.mirror_tid);
2801 kprintf("%*.*s [%08x] (%s) refs=%d",
2804 ((chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
2805 chain->data) ? (char *)chain->data->ipdata.filename : "?"),
2808 parent = chain->parent;
2810 kprintf("\n%*.*s p=%p [pflags %08x prefs %d",
2812 parent, parent->flags, parent->refs);
2813 if (RB_EMPTY(&chain->core.rbtree)) {
2817 RB_FOREACH(scan, hammer2_chain_tree, &chain->core.rbtree)
2818 hammer2_dump_chain(scan, tab + 4, countp, 'a');
2819 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && chain->data)
2820 kprintf("%*.*s}(%s)\n", tab, tab, "",
2821 chain->data->ipdata.filename);
2823 kprintf("%*.*s}\n", tab, tab, "");