2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/fcntl.h>
39 #include <sys/namecache.h>
40 #include <sys/vnode.h>
41 #include <sys/lockf.h>
42 #include <sys/event.h>
44 #include <sys/dirent.h>
46 #include <vm/vm_extern.h>
47 #include <vm/swap_pager.h>
48 #include <vfs/fifofs/fifo.h>
55 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
56 static int hammer_vop_fsync(struct vop_fsync_args *);
57 static int hammer_vop_read(struct vop_read_args *);
58 static int hammer_vop_write(struct vop_write_args *);
59 static int hammer_vop_access(struct vop_access_args *);
60 static int hammer_vop_advlock(struct vop_advlock_args *);
61 static int hammer_vop_close(struct vop_close_args *);
62 static int hammer_vop_ncreate(struct vop_ncreate_args *);
63 static int hammer_vop_getattr(struct vop_getattr_args *);
64 static int hammer_vop_nresolve(struct vop_nresolve_args *);
65 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
66 static int hammer_vop_nlink(struct vop_nlink_args *);
67 static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
68 static int hammer_vop_nmknod(struct vop_nmknod_args *);
69 static int hammer_vop_open(struct vop_open_args *);
70 static int hammer_vop_print(struct vop_print_args *);
71 static int hammer_vop_readdir(struct vop_readdir_args *);
72 static int hammer_vop_readlink(struct vop_readlink_args *);
73 static int hammer_vop_nremove(struct vop_nremove_args *);
74 static int hammer_vop_nrename(struct vop_nrename_args *);
75 static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
76 static int hammer_vop_markatime(struct vop_markatime_args *);
77 static int hammer_vop_setattr(struct vop_setattr_args *);
78 static int hammer_vop_strategy(struct vop_strategy_args *);
79 static int hammer_vop_bmap(struct vop_bmap_args *ap);
80 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
81 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
82 static int hammer_vop_ioctl(struct vop_ioctl_args *);
83 static int hammer_vop_mountctl(struct vop_mountctl_args *);
84 static int hammer_vop_kqfilter (struct vop_kqfilter_args *);
86 static int hammer_vop_fifoclose (struct vop_close_args *);
87 static int hammer_vop_fiforead (struct vop_read_args *);
88 static int hammer_vop_fifowrite (struct vop_write_args *);
89 static int hammer_vop_fifokqfilter (struct vop_kqfilter_args *);
91 struct vop_ops hammer_vnode_vops = {
92 .vop_default = vop_defaultop,
93 .vop_fsync = hammer_vop_fsync,
94 .vop_getpages = vop_stdgetpages,
95 .vop_putpages = vop_stdputpages,
96 .vop_read = hammer_vop_read,
97 .vop_write = hammer_vop_write,
98 .vop_access = hammer_vop_access,
99 .vop_advlock = hammer_vop_advlock,
100 .vop_close = hammer_vop_close,
101 .vop_ncreate = hammer_vop_ncreate,
102 .vop_getattr = hammer_vop_getattr,
103 .vop_inactive = hammer_vop_inactive,
104 .vop_reclaim = hammer_vop_reclaim,
105 .vop_nresolve = hammer_vop_nresolve,
106 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
107 .vop_nlink = hammer_vop_nlink,
108 .vop_nmkdir = hammer_vop_nmkdir,
109 .vop_nmknod = hammer_vop_nmknod,
110 .vop_open = hammer_vop_open,
111 .vop_pathconf = vop_stdpathconf,
112 .vop_print = hammer_vop_print,
113 .vop_readdir = hammer_vop_readdir,
114 .vop_readlink = hammer_vop_readlink,
115 .vop_nremove = hammer_vop_nremove,
116 .vop_nrename = hammer_vop_nrename,
117 .vop_nrmdir = hammer_vop_nrmdir,
118 .vop_markatime = hammer_vop_markatime,
119 .vop_setattr = hammer_vop_setattr,
120 .vop_bmap = hammer_vop_bmap,
121 .vop_strategy = hammer_vop_strategy,
122 .vop_nsymlink = hammer_vop_nsymlink,
123 .vop_nwhiteout = hammer_vop_nwhiteout,
124 .vop_ioctl = hammer_vop_ioctl,
125 .vop_mountctl = hammer_vop_mountctl,
126 .vop_kqfilter = hammer_vop_kqfilter
129 struct vop_ops hammer_spec_vops = {
130 .vop_default = vop_defaultop,
131 .vop_fsync = hammer_vop_fsync,
132 .vop_read = vop_stdnoread,
133 .vop_write = vop_stdnowrite,
134 .vop_access = hammer_vop_access,
135 .vop_close = hammer_vop_close,
136 .vop_markatime = hammer_vop_markatime,
137 .vop_getattr = hammer_vop_getattr,
138 .vop_inactive = hammer_vop_inactive,
139 .vop_reclaim = hammer_vop_reclaim,
140 .vop_setattr = hammer_vop_setattr
143 struct vop_ops hammer_fifo_vops = {
144 .vop_default = fifo_vnoperate,
145 .vop_fsync = hammer_vop_fsync,
146 .vop_read = hammer_vop_fiforead,
147 .vop_write = hammer_vop_fifowrite,
148 .vop_access = hammer_vop_access,
149 .vop_close = hammer_vop_fifoclose,
150 .vop_markatime = hammer_vop_markatime,
151 .vop_getattr = hammer_vop_getattr,
152 .vop_inactive = hammer_vop_inactive,
153 .vop_reclaim = hammer_vop_reclaim,
154 .vop_setattr = hammer_vop_setattr,
155 .vop_kqfilter = hammer_vop_fifokqfilter
160 hammer_knote(struct vnode *vp, int flags)
163 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, flags);
166 #ifdef DEBUG_TRUNCATE
167 struct hammer_inode *HammerTruncIp;
170 static int hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
171 struct vnode *dvp, struct ucred *cred,
172 int flags, int isdir);
173 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
174 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
179 hammer_vop_vnoperate(struct vop_generic_args *)
181 return (VOCALL(&hammer_vnode_vops, ap));
186 * hammer_vop_fsync { vp, waitfor }
188 * fsync() an inode to disk and wait for it to be completely committed
189 * such that the information would not be undone if a crash occured after
192 * NOTE: HAMMER's fsync()'s are going to remain expensive until we implement
193 * a REDO log. A sysctl is provided to relax HAMMER's fsync()
196 * Ultimately the combination of a REDO log and use of fast storage
197 * to front-end cluster caches will make fsync fast, but it aint
198 * here yet. And, in anycase, we need real transactional
199 * all-or-nothing features which are not restricted to a single file.
203 hammer_vop_fsync(struct vop_fsync_args *ap)
205 hammer_inode_t ip = VTOI(ap->a_vp);
206 hammer_mount_t hmp = ip->hmp;
207 int waitfor = ap->a_waitfor;
210 lwkt_gettoken(&hmp->fs_token);
213 * Fsync rule relaxation (default is either full synchronous flush
214 * or REDO semantics with synchronous flush).
216 if (ap->a_flags & VOP_FSYNC_SYSCALL) {
217 switch(hammer_fsync_mode) {
220 /* no REDO, full synchronous flush */
224 /* no REDO, full asynchronous flush */
225 if (waitfor == MNT_WAIT)
226 waitfor = MNT_NOWAIT;
229 /* REDO semantics, synchronous flush */
230 if (hmp->version < HAMMER_VOL_VERSION_FOUR)
232 mode = HAMMER_FLUSH_UNDOS_AUTO;
235 /* REDO semantics, relaxed asynchronous flush */
236 if (hmp->version < HAMMER_VOL_VERSION_FOUR)
238 mode = HAMMER_FLUSH_UNDOS_RELAXED;
239 if (waitfor == MNT_WAIT)
240 waitfor = MNT_NOWAIT;
243 /* ignore the fsync() system call */
244 lwkt_reltoken(&hmp->fs_token);
247 /* we have to do something */
248 mode = HAMMER_FLUSH_UNDOS_RELAXED;
249 if (waitfor == MNT_WAIT)
250 waitfor = MNT_NOWAIT;
255 * Fast fsync only needs to flush the UNDO/REDO fifo if
256 * HAMMER_INODE_REDO is non-zero and the only modifications
257 * made to the file are write or write-extends.
259 if ((ip->flags & HAMMER_INODE_REDO) &&
260 (ip->flags & HAMMER_INODE_MODMASK_NOREDO) == 0
262 ++hammer_count_fsyncs;
263 hammer_flusher_flush_undos(hmp, mode);
265 lwkt_reltoken(&hmp->fs_token);
270 * REDO is enabled by fsync(), the idea being we really only
271 * want to lay down REDO records when programs are using
272 * fsync() heavily. The first fsync() on the file starts
273 * the gravy train going and later fsync()s keep it hot by
274 * resetting the redo_count.
276 * We weren't running REDOs before now so we have to fall
277 * through and do a full fsync of what we have.
279 if (hmp->version >= HAMMER_VOL_VERSION_FOUR &&
280 (hmp->flags & HAMMER_MOUNT_REDO_RECOVERY_RUN) == 0) {
281 ip->flags |= HAMMER_INODE_REDO;
288 * Do a full flush sequence.
290 * Attempt to release the vnode while waiting for the inode to
291 * finish flushing. This can really mess up inactive->reclaim
292 * sequences so only do it if the vnode is active.
294 ++hammer_count_fsyncs;
295 vfsync(ap->a_vp, waitfor, 1, NULL, NULL);
296 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
297 if (waitfor == MNT_WAIT) {
298 if ((ap->a_vp->v_flag & VINACTIVE) == 0)
300 hammer_wait_inode(ip);
301 if ((ap->a_vp->v_flag & VINACTIVE) == 0)
302 vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY);
304 lwkt_reltoken(&hmp->fs_token);
309 * hammer_vop_read { vp, uio, ioflag, cred }
311 * MPSAFE (for the cache safe does not require fs_token)
315 hammer_vop_read(struct vop_read_args *ap)
317 struct hammer_transaction trans;
332 if (ap->a_vp->v_type != VREG)
341 * Attempt to shortcut directly to the VM object using lwbufs.
342 * This is much faster than instantiating buffer cache buffers.
344 resid = uio->uio_resid;
345 error = vop_helper_read_shortcut(ap);
346 hammer_stats_file_read += resid - uio->uio_resid;
349 if (uio->uio_resid == 0)
353 * Allow the UIO's size to override the sequential heuristic.
355 blksize = hammer_blocksize(uio->uio_offset);
356 seqcount = (uio->uio_resid + (BKVASIZE - 1)) / BKVASIZE;
357 ioseqcount = (ap->a_ioflag >> 16);
358 if (seqcount < ioseqcount)
359 seqcount = ioseqcount;
362 * If reading or writing a huge amount of data we have to break
363 * atomicy and allow the operation to be interrupted by a signal
364 * or it can DOS the machine.
366 bigread = (uio->uio_resid > 100 * 1024 * 1024);
369 * Access the data typically in HAMMER_BUFSIZE blocks via the
370 * buffer cache, but HAMMER may use a variable block size based
373 * XXX Temporary hack, delay the start transaction while we remain
374 * MPSAFE. NOTE: ino_data.size cannot change while vnode is
377 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_data.size) {
381 blksize = hammer_blocksize(uio->uio_offset);
382 offset = (int)uio->uio_offset & (blksize - 1);
383 base_offset = uio->uio_offset - offset;
385 if (bigread && (error = hammer_signal_check(ip->hmp)) != 0)
391 bp = getblk(ap->a_vp, base_offset, blksize, 0, 0);
392 if ((bp->b_flags & (B_INVAL | B_CACHE | B_RAM)) == B_CACHE) {
393 bp->b_flags &= ~B_AGE;
397 if (ap->a_ioflag & IO_NRDELAY) {
399 return (EWOULDBLOCK);
405 if (got_fstoken == 0) {
406 lwkt_gettoken(&hmp->fs_token);
408 hammer_start_transaction(&trans, ip->hmp);
412 * NOTE: A valid bp has already been acquired, but was not
415 if (hammer_cluster_enable) {
417 * Use file_limit to prevent cluster_read() from
418 * creating buffers of the wrong block size past
421 file_limit = ip->ino_data.size;
422 if (base_offset < HAMMER_XDEMARC &&
423 file_limit > HAMMER_XDEMARC) {
424 file_limit = HAMMER_XDEMARC;
426 error = cluster_readx(ap->a_vp,
427 file_limit, base_offset,
428 blksize, uio->uio_resid,
429 seqcount * BKVASIZE, &bp);
431 error = breadnx(ap->a_vp, base_offset, blksize,
439 if ((hammer_debug_io & 0x0001) && (bp->b_flags & B_IODEBUG)) {
440 kprintf("doff %016jx read file %016jx@%016jx\n",
441 (intmax_t)bp->b_bio2.bio_offset,
442 (intmax_t)ip->obj_id,
443 (intmax_t)bp->b_loffset);
445 bp->b_flags &= ~B_IODEBUG;
446 if (blksize == HAMMER_XBUFSIZE)
447 bp->b_flags |= B_CLUSTEROK;
449 n = blksize - offset;
450 if (n > uio->uio_resid)
452 if (n > ip->ino_data.size - uio->uio_offset)
453 n = (int)(ip->ino_data.size - uio->uio_offset);
455 lwkt_reltoken(&hmp->fs_token);
458 * Set B_AGE, data has a lower priority than meta-data.
460 * Use a hold/unlock/drop sequence to run the uiomove
461 * with the buffer unlocked, avoiding deadlocks against
462 * read()s on mmap()'d spaces.
464 bp->b_flags |= B_AGE;
465 error = uiomovebp(bp, (char *)bp->b_data + offset, n, uio);
469 lwkt_gettoken(&hmp->fs_token);
473 hammer_stats_file_read += n;
479 * Try to update the atime with just the inode lock for maximum
480 * concurrency. If we can't shortcut it we have to get the full
483 if (got_fstoken == 0 && hammer_update_atime_quick(ip) < 0) {
484 lwkt_gettoken(&hmp->fs_token);
486 hammer_start_transaction(&trans, ip->hmp);
490 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
491 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
492 ip->ino_data.atime = trans.time;
493 hammer_modify_inode(&trans, ip, HAMMER_INODE_ATIME);
495 hammer_done_transaction(&trans);
496 lwkt_reltoken(&hmp->fs_token);
502 * hammer_vop_write { vp, uio, ioflag, cred }
506 hammer_vop_write(struct vop_write_args *ap)
508 struct hammer_transaction trans;
509 struct hammer_inode *ip;
524 if (ap->a_vp->v_type != VREG)
530 seqcount = ap->a_ioflag >> 16;
532 if (ip->flags & HAMMER_INODE_RO)
536 * Create a transaction to cover the operations we perform.
538 lwkt_gettoken(&hmp->fs_token);
539 hammer_start_transaction(&trans, hmp);
545 if (ap->a_ioflag & IO_APPEND)
546 uio->uio_offset = ip->ino_data.size;
549 * Check for illegal write offsets. Valid range is 0...2^63-1.
551 * NOTE: the base_off assignment is required to work around what
552 * I consider to be a GCC-4 optimization bug.
554 if (uio->uio_offset < 0) {
555 hammer_done_transaction(&trans);
556 lwkt_reltoken(&hmp->fs_token);
559 base_offset = uio->uio_offset + uio->uio_resid; /* work around gcc-4 */
560 if (uio->uio_resid > 0 && base_offset <= uio->uio_offset) {
561 hammer_done_transaction(&trans);
562 lwkt_reltoken(&hmp->fs_token);
566 if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
567 base_offset > td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
568 hammer_done_transaction(&trans);
569 lwkt_reltoken(&hmp->fs_token);
570 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
575 * If reading or writing a huge amount of data we have to break
576 * atomicy and allow the operation to be interrupted by a signal
577 * or it can DOS the machine.
579 * Preset redo_count so we stop generating REDOs earlier if the
582 bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
583 if ((ip->flags & HAMMER_INODE_REDO) &&
584 ip->redo_count < hammer_limit_redo) {
585 ip->redo_count += uio->uio_resid;
589 * Access the data typically in HAMMER_BUFSIZE blocks via the
590 * buffer cache, but HAMMER may use a variable block size based
593 while (uio->uio_resid > 0) {
601 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE)) != 0)
603 if (bigwrite && (error = hammer_signal_check(hmp)) != 0)
606 blksize = hammer_blocksize(uio->uio_offset);
609 * Do not allow HAMMER to blow out the buffer cache. Very
610 * large UIOs can lockout other processes due to bwillwrite()
613 * The hammer inode is not locked during these operations.
614 * The vnode is locked which can interfere with the pageout
615 * daemon for non-UIO_NOCOPY writes but should not interfere
616 * with the buffer cache. Even so, we cannot afford to
617 * allow the pageout daemon to build up too many dirty buffer
620 * Only call this if we aren't being recursively called from
621 * a virtual disk device (vn), else we may deadlock.
623 if ((ap->a_ioflag & IO_RECURSE) == 0)
627 * Control the number of pending records associated with
628 * this inode. If too many have accumulated start a
629 * flush. Try to maintain a pipeline with the flusher.
631 * NOTE: It is possible for other sources to grow the
632 * records but not necessarily issue another flush,
633 * so use a timeout and ensure that a re-flush occurs.
635 if (ip->rsv_recs >= hammer_limit_inode_recs) {
636 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
637 while (ip->rsv_recs >= hammer_limit_inode_recs * 2) {
638 ip->flags |= HAMMER_INODE_RECSW;
639 tsleep(&ip->rsv_recs, 0, "hmrwww", hz);
640 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
646 * Do not allow HAMMER to blow out system memory by
647 * accumulating too many records. Records are so well
648 * decoupled from the buffer cache that it is possible
649 * for userland to push data out to the media via
650 * direct-write, but build up the records queued to the
651 * backend faster then the backend can flush them out.
652 * HAMMER has hit its write limit but the frontend has
653 * no pushback to slow it down.
655 if (hmp->rsv_recs > hammer_limit_recs / 2) {
657 * Get the inode on the flush list
659 if (ip->rsv_recs >= 64)
660 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
661 else if (ip->rsv_recs >= 16)
662 hammer_flush_inode(ip, 0);
665 * Keep the flusher going if the system keeps
668 delta = hmp->count_newrecords -
669 hmp->last_newrecords;
670 if (delta < 0 || delta > hammer_limit_recs / 2) {
671 hmp->last_newrecords = hmp->count_newrecords;
672 hammer_sync_hmp(hmp, MNT_NOWAIT);
676 * If we have gotten behind start slowing
679 delta = (hmp->rsv_recs - hammer_limit_recs) *
680 hz / hammer_limit_recs;
682 tsleep(&trans, 0, "hmrslo", delta);
687 * Calculate the blocksize at the current offset and figure
688 * out how much we can actually write.
690 blkmask = blksize - 1;
691 offset = (int)uio->uio_offset & blkmask;
692 base_offset = uio->uio_offset & ~(int64_t)blkmask;
693 n = blksize - offset;
694 if (n > uio->uio_resid) {
700 nsize = uio->uio_offset + n;
701 if (nsize > ip->ino_data.size) {
702 if (uio->uio_offset > ip->ino_data.size)
706 nvextendbuf(ap->a_vp,
709 hammer_blocksize(ip->ino_data.size),
710 hammer_blocksize(nsize),
711 hammer_blockoff(ip->ino_data.size),
712 hammer_blockoff(nsize),
715 kflags |= NOTE_EXTEND;
718 if (uio->uio_segflg == UIO_NOCOPY) {
720 * Issuing a write with the same data backing the
721 * buffer. Instantiate the buffer to collect the
722 * backing vm pages, then read-in any missing bits.
724 * This case is used by vop_stdputpages().
726 bp = getblk(ap->a_vp, base_offset,
727 blksize, GETBLK_BHEAVY, 0);
728 if ((bp->b_flags & B_CACHE) == 0) {
730 error = bread(ap->a_vp, base_offset,
733 } else if (offset == 0 && uio->uio_resid >= blksize) {
735 * Even though we are entirely overwriting the buffer
736 * we may still have to zero it out to avoid a
737 * mmap/write visibility issue.
739 bp = getblk(ap->a_vp, base_offset, blksize, GETBLK_BHEAVY, 0);
740 if ((bp->b_flags & B_CACHE) == 0)
742 } else if (base_offset >= ip->ino_data.size) {
744 * If the base offset of the buffer is beyond the
745 * file EOF, we don't have to issue a read.
747 bp = getblk(ap->a_vp, base_offset,
748 blksize, GETBLK_BHEAVY, 0);
752 * Partial overwrite, read in any missing bits then
753 * replace the portion being written.
755 error = bread(ap->a_vp, base_offset, blksize, &bp);
760 lwkt_reltoken(&hmp->fs_token);
761 error = uiomovebp(bp, bp->b_data + offset, n, uio);
762 lwkt_gettoken(&hmp->fs_token);
766 * Generate REDO records if enabled and redo_count will not
767 * exceeded the limit.
769 * If redo_count exceeds the limit we stop generating records
770 * and clear HAMMER_INODE_REDO. This will cause the next
771 * fsync() to do a full meta-data sync instead of just an
772 * UNDO/REDO fifo update.
774 * When clearing HAMMER_INODE_REDO any pre-existing REDOs
775 * will still be tracked. The tracks will be terminated
776 * when the related meta-data (including possible data
777 * modifications which are not tracked via REDO) is
780 if ((ip->flags & HAMMER_INODE_REDO) && error == 0) {
781 if (ip->redo_count < hammer_limit_redo) {
782 bp->b_flags |= B_VFSFLAG1;
783 error = hammer_generate_redo(&trans, ip,
784 base_offset + offset,
789 ip->flags &= ~HAMMER_INODE_REDO;
794 * If we screwed up we have to undo any VM size changes we
800 nvtruncbuf(ap->a_vp, ip->ino_data.size,
801 hammer_blocksize(ip->ino_data.size),
802 hammer_blockoff(ip->ino_data.size),
807 kflags |= NOTE_WRITE;
808 hammer_stats_file_write += n;
809 if (blksize == HAMMER_XBUFSIZE)
810 bp->b_flags |= B_CLUSTEROK;
811 if (ip->ino_data.size < uio->uio_offset) {
812 ip->ino_data.size = uio->uio_offset;
813 flags = HAMMER_INODE_SDIRTY;
817 ip->ino_data.mtime = trans.time;
818 flags |= HAMMER_INODE_MTIME | HAMMER_INODE_BUFS;
819 hammer_modify_inode(&trans, ip, flags);
822 * Once we dirty the buffer any cached zone-X offset
823 * becomes invalid. HAMMER NOTE: no-history mode cannot
824 * allow overwriting over the same data sector unless
825 * we provide UNDOs for the old data, which we don't.
827 bp->b_bio2.bio_offset = NOOFFSET;
830 * Final buffer disposition.
832 * Because meta-data updates are deferred, HAMMER is
833 * especially sensitive to excessive bdwrite()s because
834 * the I/O stream is not broken up by disk reads. So the
835 * buffer cache simply cannot keep up.
837 * WARNING! blksize is variable. cluster_write() is
838 * expected to not blow up if it encounters
839 * buffers that do not match the passed blksize.
841 * NOTE! Hammer shouldn't need to bawrite()/cluster_write().
842 * The ip->rsv_recs check should burst-flush the data.
843 * If we queue it immediately the buf could be left
844 * locked on the device queue for a very long time.
846 * However, failing to flush a dirty buffer out when
847 * issued from the pageout daemon can result in a low
848 * memory deadlock against bio_page_alloc(), so we
849 * have to bawrite() on IO_ASYNC as well.
851 * NOTE! To avoid degenerate stalls due to mismatched block
852 * sizes we only honor IO_DIRECT on the write which
853 * abuts the end of the buffer. However, we must
854 * honor IO_SYNC in case someone is silly enough to
855 * configure a HAMMER file as swap, or when HAMMER
856 * is serving NFS (for commits). Ick ick.
858 bp->b_flags |= B_AGE;
859 if (blksize == HAMMER_XBUFSIZE)
860 bp->b_flags |= B_CLUSTEROK;
862 if (ap->a_ioflag & IO_SYNC) {
864 } else if ((ap->a_ioflag & IO_DIRECT) && endofblk) {
866 } else if (ap->a_ioflag & IO_ASYNC) {
868 } else if (hammer_cluster_enable &&
869 !(ap->a_vp->v_mount->mnt_flag & MNT_NOCLUSTERW)) {
870 if (base_offset < HAMMER_XDEMARC)
871 cluster_eof = hammer_blockdemarc(base_offset,
874 cluster_eof = ip->ino_data.size;
875 cluster_write(bp, cluster_eof, blksize, seqcount);
880 hammer_done_transaction(&trans);
881 hammer_knote(ap->a_vp, kflags);
882 lwkt_reltoken(&hmp->fs_token);
887 * hammer_vop_access { vp, mode, cred }
889 * MPSAFE - does not require fs_token
893 hammer_vop_access(struct vop_access_args *ap)
895 struct hammer_inode *ip = VTOI(ap->a_vp);
900 ++hammer_stats_file_iopsr;
901 uid = hammer_to_unix_xid(&ip->ino_data.uid);
902 gid = hammer_to_unix_xid(&ip->ino_data.gid);
904 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
905 ip->ino_data.uflags);
910 * hammer_vop_advlock { vp, id, op, fl, flags }
912 * MPSAFE - does not require fs_token
916 hammer_vop_advlock(struct vop_advlock_args *ap)
918 hammer_inode_t ip = VTOI(ap->a_vp);
920 return (lf_advlock(ap, &ip->advlock, ip->ino_data.size));
924 * hammer_vop_close { vp, fflag }
926 * We can only sync-on-close for normal closes. XXX disabled for now.
930 hammer_vop_close(struct vop_close_args *ap)
933 struct vnode *vp = ap->a_vp;
934 hammer_inode_t ip = VTOI(vp);
936 if (ip->flags & (HAMMER_INODE_CLOSESYNC|HAMMER_INODE_CLOSEASYNC)) {
937 if (vn_islocked(vp) == LK_EXCLUSIVE &&
938 (vp->v_flag & (VINACTIVE|VRECLAIMED)) == 0) {
939 if (ip->flags & HAMMER_INODE_CLOSESYNC)
942 waitfor = MNT_NOWAIT;
943 ip->flags &= ~(HAMMER_INODE_CLOSESYNC |
944 HAMMER_INODE_CLOSEASYNC);
945 VOP_FSYNC(vp, MNT_NOWAIT, waitfor);
949 return (vop_stdclose(ap));
953 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
955 * The operating system has already ensured that the directory entry
956 * does not exist and done all appropriate namespace locking.
960 hammer_vop_ncreate(struct vop_ncreate_args *ap)
962 struct hammer_transaction trans;
963 struct hammer_inode *dip;
964 struct hammer_inode *nip;
965 struct nchandle *nch;
970 dip = VTOI(ap->a_dvp);
973 if (dip->flags & HAMMER_INODE_RO)
975 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
979 * Create a transaction to cover the operations we perform.
981 lwkt_gettoken(&hmp->fs_token);
982 hammer_start_transaction(&trans, hmp);
983 ++hammer_stats_file_iopsw;
986 * Create a new filesystem object of the requested type. The
987 * returned inode will be referenced and shared-locked to prevent
988 * it from being moved to the flusher.
990 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
991 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
994 hkprintf("hammer_create_inode error %d\n", error);
995 hammer_done_transaction(&trans);
997 lwkt_reltoken(&hmp->fs_token);
1002 * Add the new filesystem object to the directory. This will also
1003 * bump the inode's link count.
1005 error = hammer_ip_add_directory(&trans, dip,
1006 nch->ncp->nc_name, nch->ncp->nc_nlen,
1009 hkprintf("hammer_ip_add_directory error %d\n", error);
1015 hammer_rel_inode(nip, 0);
1016 hammer_done_transaction(&trans);
1019 error = hammer_get_vnode(nip, ap->a_vpp);
1020 hammer_done_transaction(&trans);
1021 hammer_rel_inode(nip, 0);
1023 cache_setunresolved(ap->a_nch);
1024 cache_setvp(ap->a_nch, *ap->a_vpp);
1026 hammer_knote(ap->a_dvp, NOTE_WRITE);
1028 lwkt_reltoken(&hmp->fs_token);
1033 * hammer_vop_getattr { vp, vap }
1035 * Retrieve an inode's attribute information. When accessing inodes
1036 * historically we fake the atime field to ensure consistent results.
1037 * The atime field is stored in the B-Tree element and allowed to be
1038 * updated without cycling the element.
1040 * MPSAFE - does not require fs_token
1044 hammer_vop_getattr(struct vop_getattr_args *ap)
1046 struct hammer_inode *ip = VTOI(ap->a_vp);
1047 struct vattr *vap = ap->a_vap;
1050 * We want the fsid to be different when accessing a filesystem
1051 * with different as-of's so programs like diff don't think
1052 * the files are the same.
1054 * We also want the fsid to be the same when comparing snapshots,
1055 * or when comparing mirrors (which might be backed by different
1056 * physical devices). HAMMER fsids are based on the PFS's
1057 * shared_uuid field.
1059 * XXX there is a chance of collision here. The va_fsid reported
1060 * by stat is different from the more involved fsid used in the
1063 ++hammer_stats_file_iopsr;
1064 hammer_lock_sh(&ip->lock);
1065 vap->va_fsid = ip->pfsm->fsid_udev ^ (u_int32_t)ip->obj_asof ^
1066 (u_int32_t)(ip->obj_asof >> 32);
1068 vap->va_fileid = ip->ino_leaf.base.obj_id;
1069 vap->va_mode = ip->ino_data.mode;
1070 vap->va_nlink = ip->ino_data.nlinks;
1071 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1072 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1075 vap->va_size = ip->ino_data.size;
1078 * Special case for @@PFS softlinks. The actual size of the
1079 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
1080 * or for MAX_TID is "@@-1:%05d" == 10 bytes.
1082 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_SOFTLINK &&
1083 ip->ino_data.size == 10 &&
1084 ip->obj_asof == HAMMER_MAX_TID &&
1085 ip->obj_localization == 0 &&
1086 strncmp(ip->ino_data.ext.symlink, "@@PFS", 5) == 0) {
1087 if (ip->pfsm->pfsd.mirror_flags & HAMMER_PFSD_SLAVE)
1094 * We must provide a consistent atime and mtime for snapshots
1095 * so people can do a 'tar cf - ... | md5' on them and get
1096 * consistent results.
1098 if (ip->flags & HAMMER_INODE_RO) {
1099 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_atime);
1100 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_mtime);
1102 hammer_time_to_timespec(ip->ino_data.atime, &vap->va_atime);
1103 hammer_time_to_timespec(ip->ino_data.mtime, &vap->va_mtime);
1105 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
1106 vap->va_flags = ip->ino_data.uflags;
1107 vap->va_gen = 1; /* hammer inums are unique for all time */
1108 vap->va_blocksize = HAMMER_BUFSIZE;
1109 if (ip->ino_data.size >= HAMMER_XDEMARC) {
1110 vap->va_bytes = (ip->ino_data.size + HAMMER_XBUFMASK64) &
1112 } else if (ip->ino_data.size > HAMMER_BUFSIZE / 2) {
1113 vap->va_bytes = (ip->ino_data.size + HAMMER_BUFMASK64) &
1116 vap->va_bytes = (ip->ino_data.size + 15) & ~15;
1119 vap->va_type = hammer_get_vnode_type(ip->ino_data.obj_type);
1120 vap->va_filerev = 0; /* XXX */
1121 vap->va_uid_uuid = ip->ino_data.uid;
1122 vap->va_gid_uuid = ip->ino_data.gid;
1123 vap->va_fsid_uuid = ip->hmp->fsid;
1124 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
1127 switch (ip->ino_data.obj_type) {
1128 case HAMMER_OBJTYPE_CDEV:
1129 case HAMMER_OBJTYPE_BDEV:
1130 vap->va_rmajor = ip->ino_data.rmajor;
1131 vap->va_rminor = ip->ino_data.rminor;
1136 hammer_unlock(&ip->lock);
1141 * hammer_vop_nresolve { nch, dvp, cred }
1143 * Locate the requested directory entry.
1147 hammer_vop_nresolve(struct vop_nresolve_args *ap)
1149 struct hammer_transaction trans;
1150 struct namecache *ncp;
1155 struct hammer_cursor cursor;
1164 u_int32_t localization;
1165 u_int32_t max_iterations;
1168 * Misc initialization, plus handle as-of name extensions. Look for
1169 * the '@@' extension. Note that as-of files and directories cannot
1172 dip = VTOI(ap->a_dvp);
1173 ncp = ap->a_nch->ncp;
1174 asof = dip->obj_asof;
1175 localization = dip->obj_localization; /* for code consistency */
1176 nlen = ncp->nc_nlen;
1177 flags = dip->flags & HAMMER_INODE_RO;
1181 lwkt_gettoken(&hmp->fs_token);
1182 hammer_simple_transaction(&trans, hmp);
1183 ++hammer_stats_file_iopsr;
1185 for (i = 0; i < nlen; ++i) {
1186 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
1187 error = hammer_str_to_tid(ncp->nc_name + i + 2,
1188 &ispfs, &asof, &localization);
1193 if (asof != HAMMER_MAX_TID)
1194 flags |= HAMMER_INODE_RO;
1201 * If this is a PFS softlink we dive into the PFS
1203 if (ispfs && nlen == 0) {
1204 ip = hammer_get_inode(&trans, dip, HAMMER_OBJID_ROOT,
1208 error = hammer_get_vnode(ip, &vp);
1209 hammer_rel_inode(ip, 0);
1215 cache_setvp(ap->a_nch, vp);
1222 * If there is no path component the time extension is relative to dip.
1223 * e.g. "fubar/@@<snapshot>"
1225 * "." is handled by the kernel, but ".@@<snapshot>" is not.
1226 * e.g. "fubar/.@@<snapshot>"
1228 * ".." is handled by the kernel. We do not currently handle
1231 if (nlen == 0 || (nlen == 1 && ncp->nc_name[0] == '.')) {
1232 ip = hammer_get_inode(&trans, dip, dip->obj_id,
1233 asof, dip->obj_localization,
1236 error = hammer_get_vnode(ip, &vp);
1237 hammer_rel_inode(ip, 0);
1243 cache_setvp(ap->a_nch, vp);
1250 * Calculate the namekey and setup the key range for the scan. This
1251 * works kinda like a chained hash table where the lower 32 bits
1252 * of the namekey synthesize the chain.
1254 * The key range is inclusive of both key_beg and key_end.
1256 namekey = hammer_directory_namekey(dip, ncp->nc_name, nlen,
1259 error = hammer_init_cursor(&trans, &cursor, &dip->cache[1], dip);
1260 cursor.key_beg.localization = dip->obj_localization +
1261 hammer_dir_localization(dip);
1262 cursor.key_beg.obj_id = dip->obj_id;
1263 cursor.key_beg.key = namekey;
1264 cursor.key_beg.create_tid = 0;
1265 cursor.key_beg.delete_tid = 0;
1266 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1267 cursor.key_beg.obj_type = 0;
1269 cursor.key_end = cursor.key_beg;
1270 cursor.key_end.key += max_iterations;
1272 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1275 * Scan all matching records (the chain), locate the one matching
1276 * the requested path component.
1278 * The hammer_ip_*() functions merge in-memory records with on-disk
1279 * records for the purposes of the search.
1282 localization = HAMMER_DEF_LOCALIZATION;
1285 error = hammer_ip_first(&cursor);
1286 while (error == 0) {
1287 error = hammer_ip_resolve_data(&cursor);
1290 if (nlen == cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF &&
1291 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
1292 obj_id = cursor.data->entry.obj_id;
1293 localization = cursor.data->entry.localization;
1296 error = hammer_ip_next(&cursor);
1299 hammer_done_cursor(&cursor);
1302 * Lookup the obj_id. This should always succeed. If it does not
1303 * the filesystem may be damaged and we return a dummy inode.
1306 ip = hammer_get_inode(&trans, dip, obj_id,
1309 if (error == ENOENT) {
1310 kprintf("HAMMER: WARNING: Missing "
1311 "inode for dirent \"%s\"\n"
1312 "\tobj_id = %016llx, asof=%016llx, lo=%08x\n",
1314 (long long)obj_id, (long long)asof,
1317 ip = hammer_get_dummy_inode(&trans, dip, obj_id,
1322 error = hammer_get_vnode(ip, &vp);
1323 hammer_rel_inode(ip, 0);
1329 cache_setvp(ap->a_nch, vp);
1332 } else if (error == ENOENT) {
1333 cache_setvp(ap->a_nch, NULL);
1336 hammer_done_transaction(&trans);
1337 lwkt_reltoken(&hmp->fs_token);
1342 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
1344 * Locate the parent directory of a directory vnode.
1346 * dvp is referenced but not locked. *vpp must be returned referenced and
1347 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
1348 * at the root, instead it could indicate that the directory we were in was
1351 * NOTE: as-of sequences are not linked into the directory structure. If
1352 * we are at the root with a different asof then the mount point, reload
1353 * the same directory with the mount point's asof. I'm not sure what this
1354 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
1355 * get confused, but it hasn't been tested.
1359 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
1361 struct hammer_transaction trans;
1362 struct hammer_inode *dip;
1363 struct hammer_inode *ip;
1365 int64_t parent_obj_id;
1366 u_int32_t parent_obj_localization;
1370 dip = VTOI(ap->a_dvp);
1371 asof = dip->obj_asof;
1375 * Whos are parent? This could be the root of a pseudo-filesystem
1376 * whos parent is in another localization domain.
1378 lwkt_gettoken(&hmp->fs_token);
1379 parent_obj_id = dip->ino_data.parent_obj_id;
1380 if (dip->obj_id == HAMMER_OBJID_ROOT)
1381 parent_obj_localization = dip->ino_data.ext.obj.parent_obj_localization;
1383 parent_obj_localization = dip->obj_localization;
1385 if (parent_obj_id == 0) {
1386 if (dip->obj_id == HAMMER_OBJID_ROOT &&
1387 asof != hmp->asof) {
1388 parent_obj_id = dip->obj_id;
1390 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
1391 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
1392 (long long)dip->obj_asof);
1395 lwkt_reltoken(&hmp->fs_token);
1400 hammer_simple_transaction(&trans, hmp);
1401 ++hammer_stats_file_iopsr;
1403 ip = hammer_get_inode(&trans, dip, parent_obj_id,
1404 asof, parent_obj_localization,
1405 dip->flags, &error);
1407 error = hammer_get_vnode(ip, ap->a_vpp);
1408 hammer_rel_inode(ip, 0);
1412 hammer_done_transaction(&trans);
1413 lwkt_reltoken(&hmp->fs_token);
1418 * hammer_vop_nlink { nch, dvp, vp, cred }
1422 hammer_vop_nlink(struct vop_nlink_args *ap)
1424 struct hammer_transaction trans;
1425 struct hammer_inode *dip;
1426 struct hammer_inode *ip;
1427 struct nchandle *nch;
1431 if (ap->a_dvp->v_mount != ap->a_vp->v_mount)
1435 dip = VTOI(ap->a_dvp);
1436 ip = VTOI(ap->a_vp);
1439 if (dip->obj_localization != ip->obj_localization)
1442 if (dip->flags & HAMMER_INODE_RO)
1444 if (ip->flags & HAMMER_INODE_RO)
1446 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
1450 * Create a transaction to cover the operations we perform.
1452 lwkt_gettoken(&hmp->fs_token);
1453 hammer_start_transaction(&trans, hmp);
1454 ++hammer_stats_file_iopsw;
1457 * Add the filesystem object to the directory. Note that neither
1458 * dip nor ip are referenced or locked, but their vnodes are
1459 * referenced. This function will bump the inode's link count.
1461 error = hammer_ip_add_directory(&trans, dip,
1462 nch->ncp->nc_name, nch->ncp->nc_nlen,
1469 cache_setunresolved(nch);
1470 cache_setvp(nch, ap->a_vp);
1472 hammer_done_transaction(&trans);
1473 hammer_knote(ap->a_vp, NOTE_LINK);
1474 hammer_knote(ap->a_dvp, NOTE_WRITE);
1475 lwkt_reltoken(&hmp->fs_token);
1480 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1482 * The operating system has already ensured that the directory entry
1483 * does not exist and done all appropriate namespace locking.
1487 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
1489 struct hammer_transaction trans;
1490 struct hammer_inode *dip;
1491 struct hammer_inode *nip;
1492 struct nchandle *nch;
1497 dip = VTOI(ap->a_dvp);
1500 if (dip->flags & HAMMER_INODE_RO)
1502 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
1506 * Create a transaction to cover the operations we perform.
1508 lwkt_gettoken(&hmp->fs_token);
1509 hammer_start_transaction(&trans, hmp);
1510 ++hammer_stats_file_iopsw;
1513 * Create a new filesystem object of the requested type. The
1514 * returned inode will be referenced but not locked.
1516 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1517 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
1520 hkprintf("hammer_mkdir error %d\n", error);
1521 hammer_done_transaction(&trans);
1523 lwkt_reltoken(&hmp->fs_token);
1527 * Add the new filesystem object to the directory. This will also
1528 * bump the inode's link count.
1530 error = hammer_ip_add_directory(&trans, dip,
1531 nch->ncp->nc_name, nch->ncp->nc_nlen,
1534 hkprintf("hammer_mkdir (add) error %d\n", error);
1540 hammer_rel_inode(nip, 0);
1543 error = hammer_get_vnode(nip, ap->a_vpp);
1544 hammer_rel_inode(nip, 0);
1546 cache_setunresolved(ap->a_nch);
1547 cache_setvp(ap->a_nch, *ap->a_vpp);
1550 hammer_done_transaction(&trans);
1552 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
1553 lwkt_reltoken(&hmp->fs_token);
1558 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1560 * The operating system has already ensured that the directory entry
1561 * does not exist and done all appropriate namespace locking.
1565 hammer_vop_nmknod(struct vop_nmknod_args *ap)
1567 struct hammer_transaction trans;
1568 struct hammer_inode *dip;
1569 struct hammer_inode *nip;
1570 struct nchandle *nch;
1575 dip = VTOI(ap->a_dvp);
1578 if (dip->flags & HAMMER_INODE_RO)
1580 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
1584 * Create a transaction to cover the operations we perform.
1586 lwkt_gettoken(&hmp->fs_token);
1587 hammer_start_transaction(&trans, hmp);
1588 ++hammer_stats_file_iopsw;
1591 * Create a new filesystem object of the requested type. The
1592 * returned inode will be referenced but not locked.
1594 * If mknod specifies a directory a pseudo-fs is created.
1596 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1597 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
1600 hammer_done_transaction(&trans);
1602 lwkt_reltoken(&hmp->fs_token);
1607 * Add the new filesystem object to the directory. This will also
1608 * bump the inode's link count.
1610 error = hammer_ip_add_directory(&trans, dip,
1611 nch->ncp->nc_name, nch->ncp->nc_nlen,
1618 hammer_rel_inode(nip, 0);
1621 error = hammer_get_vnode(nip, ap->a_vpp);
1622 hammer_rel_inode(nip, 0);
1624 cache_setunresolved(ap->a_nch);
1625 cache_setvp(ap->a_nch, *ap->a_vpp);
1628 hammer_done_transaction(&trans);
1630 hammer_knote(ap->a_dvp, NOTE_WRITE);
1631 lwkt_reltoken(&hmp->fs_token);
1636 * hammer_vop_open { vp, mode, cred, fp }
1638 * MPSAFE (does not require fs_token)
1642 hammer_vop_open(struct vop_open_args *ap)
1646 ++hammer_stats_file_iopsr;
1647 ip = VTOI(ap->a_vp);
1649 if ((ap->a_mode & FWRITE) && (ip->flags & HAMMER_INODE_RO))
1651 return(vop_stdopen(ap));
1655 * hammer_vop_print { vp }
1659 hammer_vop_print(struct vop_print_args *ap)
1665 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
1669 hammer_vop_readdir(struct vop_readdir_args *ap)
1671 struct hammer_transaction trans;
1672 struct hammer_cursor cursor;
1673 struct hammer_inode *ip;
1676 hammer_base_elm_t base;
1685 ++hammer_stats_file_iopsr;
1686 ip = VTOI(ap->a_vp);
1688 saveoff = uio->uio_offset;
1691 if (ap->a_ncookies) {
1692 ncookies = uio->uio_resid / 16 + 1;
1693 if (ncookies > 1024)
1695 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1703 lwkt_gettoken(&hmp->fs_token);
1704 hammer_simple_transaction(&trans, hmp);
1707 * Handle artificial entries
1709 * It should be noted that the minimum value for a directory
1710 * hash key on-media is 0x0000000100000000, so we can use anything
1711 * less then that to represent our 'special' key space.
1715 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1719 cookies[cookie_index] = saveoff;
1722 if (cookie_index == ncookies)
1726 if (ip->ino_data.parent_obj_id) {
1727 r = vop_write_dirent(&error, uio,
1728 ip->ino_data.parent_obj_id,
1731 r = vop_write_dirent(&error, uio,
1732 ip->obj_id, DT_DIR, 2, "..");
1737 cookies[cookie_index] = saveoff;
1740 if (cookie_index == ncookies)
1745 * Key range (begin and end inclusive) to scan. Directory keys
1746 * directly translate to a 64 bit 'seek' position.
1748 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1749 cursor.key_beg.localization = ip->obj_localization +
1750 hammer_dir_localization(ip);
1751 cursor.key_beg.obj_id = ip->obj_id;
1752 cursor.key_beg.create_tid = 0;
1753 cursor.key_beg.delete_tid = 0;
1754 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1755 cursor.key_beg.obj_type = 0;
1756 cursor.key_beg.key = saveoff;
1758 cursor.key_end = cursor.key_beg;
1759 cursor.key_end.key = HAMMER_MAX_KEY;
1760 cursor.asof = ip->obj_asof;
1761 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1763 error = hammer_ip_first(&cursor);
1765 while (error == 0) {
1766 error = hammer_ip_resolve_data(&cursor);
1769 base = &cursor.leaf->base;
1770 saveoff = base->key;
1771 KKASSERT(cursor.leaf->data_len > HAMMER_ENTRY_NAME_OFF);
1773 if (base->obj_id != ip->obj_id)
1774 panic("readdir: bad record at %p", cursor.node);
1777 * Convert pseudo-filesystems into softlinks
1779 dtype = hammer_get_dtype(cursor.leaf->base.obj_type);
1780 r = vop_write_dirent(
1781 &error, uio, cursor.data->entry.obj_id,
1783 cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF ,
1784 (void *)cursor.data->entry.name);
1789 cookies[cookie_index] = base->key;
1791 if (cookie_index == ncookies)
1793 error = hammer_ip_next(&cursor);
1795 hammer_done_cursor(&cursor);
1798 hammer_done_transaction(&trans);
1801 *ap->a_eofflag = (error == ENOENT);
1802 uio->uio_offset = saveoff;
1803 if (error && cookie_index == 0) {
1804 if (error == ENOENT)
1807 kfree(cookies, M_TEMP);
1808 *ap->a_ncookies = 0;
1809 *ap->a_cookies = NULL;
1812 if (error == ENOENT)
1815 *ap->a_ncookies = cookie_index;
1816 *ap->a_cookies = cookies;
1819 lwkt_reltoken(&hmp->fs_token);
1824 * hammer_vop_readlink { vp, uio, cred }
1828 hammer_vop_readlink(struct vop_readlink_args *ap)
1830 struct hammer_transaction trans;
1831 struct hammer_cursor cursor;
1832 struct hammer_inode *ip;
1835 u_int32_t localization;
1836 hammer_pseudofs_inmem_t pfsm;
1839 ip = VTOI(ap->a_vp);
1842 lwkt_gettoken(&hmp->fs_token);
1845 * Shortcut if the symlink data was stuffed into ino_data.
1847 * Also expand special "@@PFS%05d" softlinks (expansion only
1848 * occurs for non-historical (current) accesses made from the
1849 * primary filesystem).
1851 if (ip->ino_data.size <= HAMMER_INODE_BASESYMLEN) {
1855 ptr = ip->ino_data.ext.symlink;
1856 bytes = (int)ip->ino_data.size;
1858 ip->obj_asof == HAMMER_MAX_TID &&
1859 ip->obj_localization == 0 &&
1860 strncmp(ptr, "@@PFS", 5) == 0) {
1861 hammer_simple_transaction(&trans, hmp);
1862 bcopy(ptr + 5, buf, 5);
1864 localization = strtoul(buf, NULL, 10) << 16;
1865 pfsm = hammer_load_pseudofs(&trans, localization,
1868 if (pfsm->pfsd.mirror_flags &
1869 HAMMER_PFSD_SLAVE) {
1870 /* vap->va_size == 26 */
1871 ksnprintf(buf, sizeof(buf),
1873 (long long)pfsm->pfsd.sync_end_tid,
1874 localization >> 16);
1876 /* vap->va_size == 10 */
1877 ksnprintf(buf, sizeof(buf),
1879 localization >> 16);
1881 ksnprintf(buf, sizeof(buf),
1883 (long long)HAMMER_MAX_TID,
1884 localization >> 16);
1888 bytes = strlen(buf);
1891 hammer_rel_pseudofs(hmp, pfsm);
1892 hammer_done_transaction(&trans);
1894 error = uiomove(ptr, bytes, ap->a_uio);
1895 lwkt_reltoken(&hmp->fs_token);
1902 hammer_simple_transaction(&trans, hmp);
1903 ++hammer_stats_file_iopsr;
1904 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1907 * Key range (begin and end inclusive) to scan. Directory keys
1908 * directly translate to a 64 bit 'seek' position.
1910 cursor.key_beg.localization = ip->obj_localization +
1911 HAMMER_LOCALIZE_MISC;
1912 cursor.key_beg.obj_id = ip->obj_id;
1913 cursor.key_beg.create_tid = 0;
1914 cursor.key_beg.delete_tid = 0;
1915 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1916 cursor.key_beg.obj_type = 0;
1917 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1918 cursor.asof = ip->obj_asof;
1919 cursor.flags |= HAMMER_CURSOR_ASOF;
1921 error = hammer_ip_lookup(&cursor);
1923 error = hammer_ip_resolve_data(&cursor);
1925 KKASSERT(cursor.leaf->data_len >=
1926 HAMMER_SYMLINK_NAME_OFF);
1927 error = uiomove(cursor.data->symlink.name,
1928 cursor.leaf->data_len -
1929 HAMMER_SYMLINK_NAME_OFF,
1933 hammer_done_cursor(&cursor);
1934 hammer_done_transaction(&trans);
1935 lwkt_reltoken(&hmp->fs_token);
1940 * hammer_vop_nremove { nch, dvp, cred }
1944 hammer_vop_nremove(struct vop_nremove_args *ap)
1946 struct hammer_transaction trans;
1947 struct hammer_inode *dip;
1951 dip = VTOI(ap->a_dvp);
1954 if (hammer_nohistory(dip) == 0 &&
1955 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1959 lwkt_gettoken(&hmp->fs_token);
1960 hammer_start_transaction(&trans, hmp);
1961 ++hammer_stats_file_iopsw;
1962 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 0);
1963 hammer_done_transaction(&trans);
1965 hammer_knote(ap->a_dvp, NOTE_WRITE);
1966 lwkt_reltoken(&hmp->fs_token);
1971 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1975 hammer_vop_nrename(struct vop_nrename_args *ap)
1977 struct hammer_transaction trans;
1978 struct namecache *fncp;
1979 struct namecache *tncp;
1980 struct hammer_inode *fdip;
1981 struct hammer_inode *tdip;
1982 struct hammer_inode *ip;
1984 struct hammer_cursor cursor;
1986 u_int32_t max_iterations;
1989 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1991 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1994 fdip = VTOI(ap->a_fdvp);
1995 tdip = VTOI(ap->a_tdvp);
1996 fncp = ap->a_fnch->ncp;
1997 tncp = ap->a_tnch->ncp;
1998 ip = VTOI(fncp->nc_vp);
1999 KKASSERT(ip != NULL);
2003 if (fdip->obj_localization != tdip->obj_localization)
2005 if (fdip->obj_localization != ip->obj_localization)
2008 if (fdip->flags & HAMMER_INODE_RO)
2010 if (tdip->flags & HAMMER_INODE_RO)
2012 if (ip->flags & HAMMER_INODE_RO)
2014 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
2017 lwkt_gettoken(&hmp->fs_token);
2018 hammer_start_transaction(&trans, hmp);
2019 ++hammer_stats_file_iopsw;
2022 * Remove tncp from the target directory and then link ip as
2023 * tncp. XXX pass trans to dounlink
2025 * Force the inode sync-time to match the transaction so it is
2026 * in-sync with the creation of the target directory entry.
2028 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp,
2030 if (error == 0 || error == ENOENT) {
2031 error = hammer_ip_add_directory(&trans, tdip,
2032 tncp->nc_name, tncp->nc_nlen,
2035 ip->ino_data.parent_obj_id = tdip->obj_id;
2036 ip->ino_data.ctime = trans.time;
2037 hammer_modify_inode(&trans, ip, HAMMER_INODE_DDIRTY);
2041 goto failed; /* XXX */
2044 * Locate the record in the originating directory and remove it.
2046 * Calculate the namekey and setup the key range for the scan. This
2047 * works kinda like a chained hash table where the lower 32 bits
2048 * of the namekey synthesize the chain.
2050 * The key range is inclusive of both key_beg and key_end.
2052 namekey = hammer_directory_namekey(fdip, fncp->nc_name, fncp->nc_nlen,
2055 hammer_init_cursor(&trans, &cursor, &fdip->cache[1], fdip);
2056 cursor.key_beg.localization = fdip->obj_localization +
2057 hammer_dir_localization(fdip);
2058 cursor.key_beg.obj_id = fdip->obj_id;
2059 cursor.key_beg.key = namekey;
2060 cursor.key_beg.create_tid = 0;
2061 cursor.key_beg.delete_tid = 0;
2062 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2063 cursor.key_beg.obj_type = 0;
2065 cursor.key_end = cursor.key_beg;
2066 cursor.key_end.key += max_iterations;
2067 cursor.asof = fdip->obj_asof;
2068 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
2071 * Scan all matching records (the chain), locate the one matching
2072 * the requested path component.
2074 * The hammer_ip_*() functions merge in-memory records with on-disk
2075 * records for the purposes of the search.
2077 error = hammer_ip_first(&cursor);
2078 while (error == 0) {
2079 if (hammer_ip_resolve_data(&cursor) != 0)
2081 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
2083 if (fncp->nc_nlen == nlen &&
2084 bcmp(fncp->nc_name, cursor.data->entry.name, nlen) == 0) {
2087 error = hammer_ip_next(&cursor);
2091 * If all is ok we have to get the inode so we can adjust nlinks.
2093 * WARNING: hammer_ip_del_directory() may have to terminate the
2094 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
2098 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
2101 * XXX A deadlock here will break rename's atomicy for the purposes
2102 * of crash recovery.
2104 if (error == EDEADLK) {
2105 hammer_done_cursor(&cursor);
2110 * Cleanup and tell the kernel that the rename succeeded.
2112 * NOTE: ip->vp, if non-NULL, cannot be directly referenced
2113 * without formally acquiring the vp since the vp might
2114 * have zero refs on it, or in the middle of a reclaim,
2117 hammer_done_cursor(&cursor);
2119 cache_rename(ap->a_fnch, ap->a_tnch);
2120 hammer_knote(ap->a_fdvp, NOTE_WRITE);
2121 hammer_knote(ap->a_tdvp, NOTE_WRITE);
2125 error = hammer_get_vnode(ip, &vp);
2126 if (error == 0 && vp) {
2128 hammer_knote(ip->vp, NOTE_RENAME);
2132 kprintf("Debug: HAMMER ip/vp race2 avoided\n");
2137 hammer_done_transaction(&trans);
2138 lwkt_reltoken(&hmp->fs_token);
2143 * hammer_vop_nrmdir { nch, dvp, cred }
2147 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
2149 struct hammer_transaction trans;
2150 struct hammer_inode *dip;
2154 dip = VTOI(ap->a_dvp);
2157 if (hammer_nohistory(dip) == 0 &&
2158 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
2162 lwkt_gettoken(&hmp->fs_token);
2163 hammer_start_transaction(&trans, hmp);
2164 ++hammer_stats_file_iopsw;
2165 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 1);
2166 hammer_done_transaction(&trans);
2168 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
2169 lwkt_reltoken(&hmp->fs_token);
2174 * hammer_vop_markatime { vp, cred }
2178 hammer_vop_markatime(struct vop_markatime_args *ap)
2180 struct hammer_transaction trans;
2181 struct hammer_inode *ip;
2184 ip = VTOI(ap->a_vp);
2185 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
2187 if (ip->flags & HAMMER_INODE_RO)
2190 if (hmp->mp->mnt_flag & MNT_NOATIME)
2192 lwkt_gettoken(&hmp->fs_token);
2193 hammer_start_transaction(&trans, hmp);
2194 ++hammer_stats_file_iopsw;
2196 ip->ino_data.atime = trans.time;
2197 hammer_modify_inode(&trans, ip, HAMMER_INODE_ATIME);
2198 hammer_done_transaction(&trans);
2199 hammer_knote(ap->a_vp, NOTE_ATTRIB);
2200 lwkt_reltoken(&hmp->fs_token);
2205 * hammer_vop_setattr { vp, vap, cred }
2209 hammer_vop_setattr(struct vop_setattr_args *ap)
2211 struct hammer_transaction trans;
2212 struct hammer_inode *ip;
2221 int64_t aligned_size;
2226 ip = ap->a_vp->v_data;
2231 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
2233 if (ip->flags & HAMMER_INODE_RO)
2235 if (hammer_nohistory(ip) == 0 &&
2236 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
2240 lwkt_gettoken(&hmp->fs_token);
2241 hammer_start_transaction(&trans, hmp);
2242 ++hammer_stats_file_iopsw;
2245 if (vap->va_flags != VNOVAL) {
2246 flags = ip->ino_data.uflags;
2247 error = vop_helper_setattr_flags(&flags, vap->va_flags,
2248 hammer_to_unix_xid(&ip->ino_data.uid),
2251 if (ip->ino_data.uflags != flags) {
2252 ip->ino_data.uflags = flags;
2253 ip->ino_data.ctime = trans.time;
2254 modflags |= HAMMER_INODE_DDIRTY;
2255 kflags |= NOTE_ATTRIB;
2257 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
2264 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
2268 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
2269 mode_t cur_mode = ip->ino_data.mode;
2270 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
2271 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
2275 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
2277 &cur_uid, &cur_gid, &cur_mode);
2279 hammer_guid_to_uuid(&uuid_uid, cur_uid);
2280 hammer_guid_to_uuid(&uuid_gid, cur_gid);
2281 if (bcmp(&uuid_uid, &ip->ino_data.uid,
2282 sizeof(uuid_uid)) ||
2283 bcmp(&uuid_gid, &ip->ino_data.gid,
2284 sizeof(uuid_gid)) ||
2285 ip->ino_data.mode != cur_mode
2287 ip->ino_data.uid = uuid_uid;
2288 ip->ino_data.gid = uuid_gid;
2289 ip->ino_data.mode = cur_mode;
2290 ip->ino_data.ctime = trans.time;
2291 modflags |= HAMMER_INODE_DDIRTY;
2293 kflags |= NOTE_ATTRIB;
2296 while (vap->va_size != VNOVAL && ip->ino_data.size != vap->va_size) {
2297 switch(ap->a_vp->v_type) {
2299 if (vap->va_size == ip->ino_data.size)
2303 * Log the operation if in fast-fsync mode or if
2304 * there are unterminated redo write records present.
2306 * The second check is needed so the recovery code
2307 * properly truncates write redos even if nominal
2308 * REDO operations is turned off due to excessive
2309 * writes, because the related records might be
2310 * destroyed and never lay down a TERM_WRITE.
2312 if ((ip->flags & HAMMER_INODE_REDO) ||
2313 (ip->flags & HAMMER_INODE_RDIRTY)) {
2314 error = hammer_generate_redo(&trans, ip,
2319 blksize = hammer_blocksize(vap->va_size);
2322 * XXX break atomicy, we can deadlock the backend
2323 * if we do not release the lock. Probably not a
2326 if (vap->va_size < ip->ino_data.size) {
2327 nvtruncbuf(ap->a_vp, vap->va_size,
2329 hammer_blockoff(vap->va_size),
2332 kflags |= NOTE_WRITE;
2334 nvextendbuf(ap->a_vp,
2337 hammer_blocksize(ip->ino_data.size),
2338 hammer_blocksize(vap->va_size),
2339 hammer_blockoff(ip->ino_data.size),
2340 hammer_blockoff(vap->va_size),
2343 kflags |= NOTE_WRITE | NOTE_EXTEND;
2345 ip->ino_data.size = vap->va_size;
2346 ip->ino_data.mtime = trans.time;
2347 /* XXX safe to use SDIRTY instead of DDIRTY here? */
2348 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
2351 * On-media truncation is cached in the inode until
2352 * the inode is synchronized. We must immediately
2353 * handle any frontend records.
2356 hammer_ip_frontend_trunc(ip, vap->va_size);
2357 #ifdef DEBUG_TRUNCATE
2358 if (HammerTruncIp == NULL)
2361 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
2362 ip->flags |= HAMMER_INODE_TRUNCATED;
2363 ip->trunc_off = vap->va_size;
2364 #ifdef DEBUG_TRUNCATE
2365 if (ip == HammerTruncIp)
2366 kprintf("truncate1 %016llx\n",
2367 (long long)ip->trunc_off);
2369 } else if (ip->trunc_off > vap->va_size) {
2370 ip->trunc_off = vap->va_size;
2371 #ifdef DEBUG_TRUNCATE
2372 if (ip == HammerTruncIp)
2373 kprintf("truncate2 %016llx\n",
2374 (long long)ip->trunc_off);
2377 #ifdef DEBUG_TRUNCATE
2378 if (ip == HammerTruncIp)
2379 kprintf("truncate3 %016llx (ignored)\n",
2380 (long long)vap->va_size);
2387 * When truncating, nvtruncbuf() may have cleaned out
2388 * a portion of the last block on-disk in the buffer
2389 * cache. We must clean out any frontend records
2390 * for blocks beyond the new last block.
2392 aligned_size = (vap->va_size + (blksize - 1)) &
2393 ~(int64_t)(blksize - 1);
2394 if (truncating && vap->va_size < aligned_size) {
2395 aligned_size -= blksize;
2396 hammer_ip_frontend_trunc(ip, aligned_size);
2401 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
2402 ip->flags |= HAMMER_INODE_TRUNCATED;
2403 ip->trunc_off = vap->va_size;
2404 } else if (ip->trunc_off > vap->va_size) {
2405 ip->trunc_off = vap->va_size;
2407 hammer_ip_frontend_trunc(ip, vap->va_size);
2408 ip->ino_data.size = vap->va_size;
2409 ip->ino_data.mtime = trans.time;
2410 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
2411 kflags |= NOTE_ATTRIB;
2419 if (vap->va_atime.tv_sec != VNOVAL) {
2420 ip->ino_data.atime = hammer_timespec_to_time(&vap->va_atime);
2421 modflags |= HAMMER_INODE_ATIME;
2422 kflags |= NOTE_ATTRIB;
2424 if (vap->va_mtime.tv_sec != VNOVAL) {
2425 ip->ino_data.mtime = hammer_timespec_to_time(&vap->va_mtime);
2426 modflags |= HAMMER_INODE_MTIME;
2427 kflags |= NOTE_ATTRIB;
2429 if (vap->va_mode != (mode_t)VNOVAL) {
2430 mode_t cur_mode = ip->ino_data.mode;
2431 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
2432 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
2434 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
2435 cur_uid, cur_gid, &cur_mode);
2436 if (error == 0 && ip->ino_data.mode != cur_mode) {
2437 ip->ino_data.mode = cur_mode;
2438 ip->ino_data.ctime = trans.time;
2439 modflags |= HAMMER_INODE_DDIRTY;
2440 kflags |= NOTE_ATTRIB;
2445 hammer_modify_inode(&trans, ip, modflags);
2446 hammer_done_transaction(&trans);
2447 hammer_knote(ap->a_vp, kflags);
2448 lwkt_reltoken(&hmp->fs_token);
2453 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
2457 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
2459 struct hammer_transaction trans;
2460 struct hammer_inode *dip;
2461 struct hammer_inode *nip;
2462 hammer_record_t record;
2463 struct nchandle *nch;
2468 ap->a_vap->va_type = VLNK;
2471 dip = VTOI(ap->a_dvp);
2474 if (dip->flags & HAMMER_INODE_RO)
2476 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
2480 * Create a transaction to cover the operations we perform.
2482 lwkt_gettoken(&hmp->fs_token);
2483 hammer_start_transaction(&trans, hmp);
2484 ++hammer_stats_file_iopsw;
2487 * Create a new filesystem object of the requested type. The
2488 * returned inode will be referenced but not locked.
2491 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
2492 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
2495 hammer_done_transaction(&trans);
2497 lwkt_reltoken(&hmp->fs_token);
2502 * Add a record representing the symlink. symlink stores the link
2503 * as pure data, not a string, and is no \0 terminated.
2506 bytes = strlen(ap->a_target);
2508 if (bytes <= HAMMER_INODE_BASESYMLEN) {
2509 bcopy(ap->a_target, nip->ino_data.ext.symlink, bytes);
2511 record = hammer_alloc_mem_record(nip, bytes);
2512 record->type = HAMMER_MEM_RECORD_GENERAL;
2514 record->leaf.base.localization = nip->obj_localization +
2515 HAMMER_LOCALIZE_MISC;
2516 record->leaf.base.key = HAMMER_FIXKEY_SYMLINK;
2517 record->leaf.base.rec_type = HAMMER_RECTYPE_FIX;
2518 record->leaf.data_len = bytes;
2519 KKASSERT(HAMMER_SYMLINK_NAME_OFF == 0);
2520 bcopy(ap->a_target, record->data->symlink.name, bytes);
2521 error = hammer_ip_add_record(&trans, record);
2525 * Set the file size to the length of the link.
2528 nip->ino_data.size = bytes;
2529 hammer_modify_inode(&trans, nip, HAMMER_INODE_DDIRTY);
2533 error = hammer_ip_add_directory(&trans, dip, nch->ncp->nc_name,
2534 nch->ncp->nc_nlen, nip);
2540 hammer_rel_inode(nip, 0);
2543 error = hammer_get_vnode(nip, ap->a_vpp);
2544 hammer_rel_inode(nip, 0);
2546 cache_setunresolved(ap->a_nch);
2547 cache_setvp(ap->a_nch, *ap->a_vpp);
2548 hammer_knote(ap->a_dvp, NOTE_WRITE);
2551 hammer_done_transaction(&trans);
2552 lwkt_reltoken(&hmp->fs_token);
2557 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
2561 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
2563 struct hammer_transaction trans;
2564 struct hammer_inode *dip;
2568 dip = VTOI(ap->a_dvp);
2571 if (hammer_nohistory(dip) == 0 &&
2572 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0) {
2576 lwkt_gettoken(&hmp->fs_token);
2577 hammer_start_transaction(&trans, hmp);
2578 ++hammer_stats_file_iopsw;
2579 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
2580 ap->a_cred, ap->a_flags, -1);
2581 hammer_done_transaction(&trans);
2582 lwkt_reltoken(&hmp->fs_token);
2588 * hammer_vop_ioctl { vp, command, data, fflag, cred }
2592 hammer_vop_ioctl(struct vop_ioctl_args *ap)
2594 struct hammer_inode *ip = ap->a_vp->v_data;
2595 hammer_mount_t hmp = ip->hmp;
2598 ++hammer_stats_file_iopsr;
2599 lwkt_gettoken(&hmp->fs_token);
2600 error = hammer_ioctl(ip, ap->a_command, ap->a_data,
2601 ap->a_fflag, ap->a_cred);
2602 lwkt_reltoken(&hmp->fs_token);
2608 hammer_vop_mountctl(struct vop_mountctl_args *ap)
2610 static const struct mountctl_opt extraopt[] = {
2611 { HMNT_NOHISTORY, "nohistory" },
2612 { HMNT_MASTERID, "master" },
2616 struct hammer_mount *hmp;
2623 mp = ap->a_head.a_ops->head.vv_mount;
2624 KKASSERT(mp->mnt_data != NULL);
2625 hmp = (struct hammer_mount *)mp->mnt_data;
2627 lwkt_gettoken(&hmp->fs_token);
2630 case MOUNTCTL_SET_EXPORT:
2631 if (ap->a_ctllen != sizeof(struct export_args))
2634 error = hammer_vfs_export(mp, ap->a_op,
2635 (const struct export_args *)ap->a_ctl);
2637 case MOUNTCTL_MOUNTFLAGS:
2640 * Call standard mountctl VOP function
2641 * so we get user mount flags.
2643 error = vop_stdmountctl(ap);
2647 usedbytes = *ap->a_res;
2649 if (usedbytes > 0 && usedbytes < ap->a_buflen) {
2650 usedbytes += vfs_flagstostr(hmp->hflags, extraopt,
2652 ap->a_buflen - usedbytes,
2656 *ap->a_res += usedbytes;
2660 error = vop_stdmountctl(ap);
2663 lwkt_reltoken(&hmp->fs_token);
2668 * hammer_vop_strategy { vp, bio }
2670 * Strategy call, used for regular file read & write only. Note that the
2671 * bp may represent a cluster.
2673 * To simplify operation and allow better optimizations in the future,
2674 * this code does not make any assumptions with regards to buffer alignment
2679 hammer_vop_strategy(struct vop_strategy_args *ap)
2684 bp = ap->a_bio->bio_buf;
2688 error = hammer_vop_strategy_read(ap);
2691 error = hammer_vop_strategy_write(ap);
2694 bp->b_error = error = EINVAL;
2695 bp->b_flags |= B_ERROR;
2700 /* hammer_dump_dedup_cache(((hammer_inode_t)ap->a_vp->v_data)->hmp); */
2706 * Read from a regular file. Iterate the related records and fill in the
2707 * BIO/BUF. Gaps are zero-filled.
2709 * The support code in hammer_object.c should be used to deal with mixed
2710 * in-memory and on-disk records.
2712 * NOTE: Can be called from the cluster code with an oversized buf.
2718 hammer_vop_strategy_read(struct vop_strategy_args *ap)
2720 struct hammer_transaction trans;
2721 struct hammer_inode *ip;
2722 struct hammer_inode *dip;
2724 struct hammer_cursor cursor;
2725 hammer_base_elm_t base;
2726 hammer_off_t disk_offset;
2741 ip = ap->a_vp->v_data;
2745 * The zone-2 disk offset may have been set by the cluster code via
2746 * a BMAP operation, or else should be NOOFFSET.
2748 * Checking the high bits for a match against zone-2 should suffice.
2750 * In cases where a lot of data duplication is present it may be
2751 * more beneficial to drop through and doubule-buffer through the
2754 nbio = push_bio(bio);
2755 if ((nbio->bio_offset & HAMMER_OFF_ZONE_MASK) ==
2756 HAMMER_ZONE_LARGE_DATA) {
2757 if (hammer_double_buffer == 0) {
2758 lwkt_gettoken(&hmp->fs_token);
2759 error = hammer_io_direct_read(hmp, nbio, NULL);
2760 lwkt_reltoken(&hmp->fs_token);
2765 * Try to shortcut requests for double_buffer mode too.
2766 * Since this mode runs through the device buffer cache
2767 * only compatible buffer sizes (meaning those generated
2768 * by normal filesystem buffers) are legal.
2770 if (hammer_live_dedup == 0 && (bp->b_flags & B_PAGING) == 0) {
2771 error = hammer_io_indirect_read(hmp, nbio, NULL);
2777 * Well, that sucked. Do it the hard way. If all the stars are
2778 * aligned we may still be able to issue a direct-read.
2780 lwkt_gettoken(&hmp->fs_token);
2781 hammer_simple_transaction(&trans, hmp);
2782 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2785 * Key range (begin and end inclusive) to scan. Note that the key's
2786 * stored in the actual records represent BASE+LEN, not BASE. The
2787 * first record containing bio_offset will have a key > bio_offset.
2789 cursor.key_beg.localization = ip->obj_localization +
2790 HAMMER_LOCALIZE_MISC;
2791 cursor.key_beg.obj_id = ip->obj_id;
2792 cursor.key_beg.create_tid = 0;
2793 cursor.key_beg.delete_tid = 0;
2794 cursor.key_beg.obj_type = 0;
2795 cursor.key_beg.key = bio->bio_offset + 1;
2796 cursor.asof = ip->obj_asof;
2797 cursor.flags |= HAMMER_CURSOR_ASOF;
2799 cursor.key_end = cursor.key_beg;
2800 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2802 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_DBFILE) {
2803 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
2804 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
2805 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2809 ran_end = bio->bio_offset + bp->b_bufsize;
2810 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2811 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2812 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2813 if (tmp64 < ran_end)
2814 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2816 cursor.key_end.key = ran_end + MAXPHYS + 1;
2818 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2821 * Set NOSWAPCACHE for cursor data extraction if double buffering
2822 * is disabled or (if the file is not marked cacheable via chflags
2823 * and vm.swapcache_use_chflags is enabled).
2825 if (hammer_double_buffer == 0 ||
2826 ((ap->a_vp->v_flag & VSWAPCACHE) == 0 &&
2827 vm_swapcache_use_chflags)) {
2828 cursor.flags |= HAMMER_CURSOR_NOSWAPCACHE;
2831 error = hammer_ip_first(&cursor);
2834 while (error == 0) {
2836 * Get the base file offset of the record. The key for
2837 * data records is (base + bytes) rather then (base).
2839 base = &cursor.leaf->base;
2840 rec_offset = base->key - cursor.leaf->data_len;
2843 * Calculate the gap, if any, and zero-fill it.
2845 * n is the offset of the start of the record verses our
2846 * current seek offset in the bio.
2848 n = (int)(rec_offset - (bio->bio_offset + boff));
2850 if (n > bp->b_bufsize - boff)
2851 n = bp->b_bufsize - boff;
2852 bzero((char *)bp->b_data + boff, n);
2858 * Calculate the data offset in the record and the number
2859 * of bytes we can copy.
2861 * There are two degenerate cases. First, boff may already
2862 * be at bp->b_bufsize. Secondly, the data offset within
2863 * the record may exceed the record's size.
2867 n = cursor.leaf->data_len - roff;
2869 kprintf("strategy_read: bad n=%d roff=%d\n", n, roff);
2871 } else if (n > bp->b_bufsize - boff) {
2872 n = bp->b_bufsize - boff;
2876 * Deal with cached truncations. This cool bit of code
2877 * allows truncate()/ftruncate() to avoid having to sync
2880 * If the frontend is truncated then all backend records are
2881 * subject to the frontend's truncation.
2883 * If the backend is truncated then backend records on-disk
2884 * (but not in-memory) are subject to the backend's
2885 * truncation. In-memory records owned by the backend
2886 * represent data written after the truncation point on the
2887 * backend and must not be truncated.
2889 * Truncate operations deal with frontend buffer cache
2890 * buffers and frontend-owned in-memory records synchronously.
2892 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2893 if (hammer_cursor_ondisk(&cursor)/* ||
2894 cursor.iprec->flush_state == HAMMER_FST_FLUSH*/) {
2895 if (ip->trunc_off <= rec_offset)
2897 else if (ip->trunc_off < rec_offset + n)
2898 n = (int)(ip->trunc_off - rec_offset);
2901 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2902 if (hammer_cursor_ondisk(&cursor)) {
2903 if (ip->sync_trunc_off <= rec_offset)
2905 else if (ip->sync_trunc_off < rec_offset + n)
2906 n = (int)(ip->sync_trunc_off - rec_offset);
2911 * Try to issue a direct read into our bio if possible,
2912 * otherwise resolve the element data into a hammer_buffer
2915 * The buffer on-disk should be zerod past any real
2916 * truncation point, but may not be for any synthesized
2917 * truncation point from above.
2919 * NOTE: disk_offset is only valid if the cursor data is
2922 disk_offset = cursor.leaf->data_offset + roff;
2923 isdedupable = (boff == 0 && n == bp->b_bufsize &&
2924 hammer_cursor_ondisk(&cursor) &&
2925 ((int)disk_offset & HAMMER_BUFMASK) == 0);
2927 if (isdedupable && hammer_double_buffer == 0) {
2931 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2932 HAMMER_ZONE_LARGE_DATA);
2933 nbio->bio_offset = disk_offset;
2934 error = hammer_io_direct_read(hmp, nbio, cursor.leaf);
2935 if (hammer_live_dedup && error == 0)
2936 hammer_dedup_cache_add(ip, cursor.leaf);
2938 } else if (isdedupable) {
2940 * Async I/O case for reading from backing store
2941 * and copying the data to the filesystem buffer.
2942 * live-dedup has to verify the data anyway if it
2943 * gets a hit later so we can just add the entry
2946 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2947 HAMMER_ZONE_LARGE_DATA);
2948 nbio->bio_offset = disk_offset;
2949 if (hammer_live_dedup)
2950 hammer_dedup_cache_add(ip, cursor.leaf);
2951 error = hammer_io_indirect_read(hmp, nbio, cursor.leaf);
2954 error = hammer_ip_resolve_data(&cursor);
2956 if (hammer_live_dedup && isdedupable)
2957 hammer_dedup_cache_add(ip, cursor.leaf);
2958 bcopy((char *)cursor.data + roff,
2959 (char *)bp->b_data + boff, n);
2966 * We have to be sure that the only elements added to the
2967 * dedup cache are those which are already on-media.
2969 if (hammer_live_dedup && hammer_cursor_ondisk(&cursor))
2970 hammer_dedup_cache_add(ip, cursor.leaf);
2973 * Iterate until we have filled the request.
2976 if (boff == bp->b_bufsize)
2978 error = hammer_ip_next(&cursor);
2982 * There may have been a gap after the last record
2984 if (error == ENOENT)
2986 if (error == 0 && boff != bp->b_bufsize) {
2987 KKASSERT(boff < bp->b_bufsize);
2988 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
2989 /* boff = bp->b_bufsize; */
2993 * Disallow swapcache operation on the vnode buffer if double
2994 * buffering is enabled, the swapcache will get the data via
2995 * the block device buffer.
2997 if (hammer_double_buffer)
2998 bp->b_flags |= B_NOTMETA;
3004 bp->b_error = error;
3006 bp->b_flags |= B_ERROR;
3011 * Cache the b-tree node for the last data read in cache[1].
3013 * If we hit the file EOF then also cache the node in the
3014 * governing director's cache[3], it will be used to initialize
3015 * the inode's cache[1] for any inodes looked up via the directory.
3017 * This doesn't reduce disk accesses since the B-Tree chain is
3018 * likely cached, but it does reduce cpu overhead when looking
3019 * up file offsets for cpdup/tar/cpio style iterations.
3022 hammer_cache_node(&ip->cache[1], cursor.node);
3023 if (ran_end >= ip->ino_data.size) {
3024 dip = hammer_find_inode(&trans, ip->ino_data.parent_obj_id,
3025 ip->obj_asof, ip->obj_localization);
3027 hammer_cache_node(&dip->cache[3], cursor.node);
3028 hammer_rel_inode(dip, 0);
3031 hammer_done_cursor(&cursor);
3032 hammer_done_transaction(&trans);
3033 lwkt_reltoken(&hmp->fs_token);
3038 * BMAP operation - used to support cluster_read() only.
3040 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
3042 * This routine may return EOPNOTSUPP if the opration is not supported for
3043 * the specified offset. The contents of the pointer arguments do not
3044 * need to be initialized in that case.
3046 * If a disk address is available and properly aligned return 0 with
3047 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
3048 * to the run-length relative to that offset. Callers may assume that
3049 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
3050 * large, so return EOPNOTSUPP if it is not sufficiently large.
3054 hammer_vop_bmap(struct vop_bmap_args *ap)
3056 struct hammer_transaction trans;
3057 struct hammer_inode *ip;
3059 struct hammer_cursor cursor;
3060 hammer_base_elm_t base;
3064 int64_t base_offset;
3065 int64_t base_disk_offset;
3066 int64_t last_offset;
3067 hammer_off_t last_disk_offset;
3068 hammer_off_t disk_offset;
3073 ++hammer_stats_file_iopsr;
3074 ip = ap->a_vp->v_data;
3078 * We can only BMAP regular files. We can't BMAP database files,
3081 if (ip->ino_data.obj_type != HAMMER_OBJTYPE_REGFILE)
3085 * bmap is typically called with runp/runb both NULL when used
3086 * for writing. We do not support BMAP for writing atm.
3088 if (ap->a_cmd != BUF_CMD_READ)
3092 * Scan the B-Tree to acquire blockmap addresses, then translate
3095 lwkt_gettoken(&hmp->fs_token);
3096 hammer_simple_transaction(&trans, hmp);
3098 kprintf("bmap_beg %016llx ip->cache %p\n",
3099 (long long)ap->a_loffset, ip->cache[1]);
3101 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
3104 * Key range (begin and end inclusive) to scan. Note that the key's
3105 * stored in the actual records represent BASE+LEN, not BASE. The
3106 * first record containing bio_offset will have a key > bio_offset.
3108 cursor.key_beg.localization = ip->obj_localization +
3109 HAMMER_LOCALIZE_MISC;
3110 cursor.key_beg.obj_id = ip->obj_id;
3111 cursor.key_beg.create_tid = 0;
3112 cursor.key_beg.delete_tid = 0;
3113 cursor.key_beg.obj_type = 0;
3115 cursor.key_beg.key = ap->a_loffset - MAXPHYS + 1;
3117 cursor.key_beg.key = ap->a_loffset + 1;
3118 if (cursor.key_beg.key < 0)
3119 cursor.key_beg.key = 0;
3120 cursor.asof = ip->obj_asof;
3121 cursor.flags |= HAMMER_CURSOR_ASOF;
3123 cursor.key_end = cursor.key_beg;
3124 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
3126 ran_end = ap->a_loffset + MAXPHYS;
3127 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
3128 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
3129 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
3130 if (tmp64 < ran_end)
3131 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
3133 cursor.key_end.key = ran_end + MAXPHYS + 1;
3135 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
3137 error = hammer_ip_first(&cursor);
3138 base_offset = last_offset = 0;
3139 base_disk_offset = last_disk_offset = 0;
3141 while (error == 0) {
3143 * Get the base file offset of the record. The key for
3144 * data records is (base + bytes) rather then (base).
3146 * NOTE: rec_offset + rec_len may exceed the end-of-file.
3147 * The extra bytes should be zero on-disk and the BMAP op
3148 * should still be ok.
3150 base = &cursor.leaf->base;
3151 rec_offset = base->key - cursor.leaf->data_len;
3152 rec_len = cursor.leaf->data_len;
3155 * Incorporate any cached truncation.
3157 * NOTE: Modifications to rec_len based on synthesized
3158 * truncation points remove the guarantee that any extended
3159 * data on disk is zero (since the truncations may not have
3160 * taken place on-media yet).
3162 if (ip->flags & HAMMER_INODE_TRUNCATED) {
3163 if (hammer_cursor_ondisk(&cursor) ||
3164 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
3165 if (ip->trunc_off <= rec_offset)
3167 else if (ip->trunc_off < rec_offset + rec_len)
3168 rec_len = (int)(ip->trunc_off - rec_offset);
3171 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
3172 if (hammer_cursor_ondisk(&cursor)) {
3173 if (ip->sync_trunc_off <= rec_offset)
3175 else if (ip->sync_trunc_off < rec_offset + rec_len)
3176 rec_len = (int)(ip->sync_trunc_off - rec_offset);
3181 * Accumulate information. If we have hit a discontiguous
3182 * block reset base_offset unless we are already beyond the
3183 * requested offset. If we are, that's it, we stop.
3187 if (hammer_cursor_ondisk(&cursor)) {
3188 disk_offset = cursor.leaf->data_offset;
3189 if (rec_offset != last_offset ||
3190 disk_offset != last_disk_offset) {
3191 if (rec_offset > ap->a_loffset)
3193 base_offset = rec_offset;
3194 base_disk_offset = disk_offset;
3196 last_offset = rec_offset + rec_len;
3197 last_disk_offset = disk_offset + rec_len;
3199 if (hammer_live_dedup)
3200 hammer_dedup_cache_add(ip, cursor.leaf);
3203 error = hammer_ip_next(&cursor);
3207 kprintf("BMAP %016llx: %016llx - %016llx\n",
3208 (long long)ap->a_loffset,
3209 (long long)base_offset,
3210 (long long)last_offset);
3211 kprintf("BMAP %16s: %016llx - %016llx\n", "",
3212 (long long)base_disk_offset,
3213 (long long)last_disk_offset);
3217 hammer_cache_node(&ip->cache[1], cursor.node);
3219 kprintf("bmap_end2 %016llx ip->cache %p\n",
3220 (long long)ap->a_loffset, ip->cache[1]);
3223 hammer_done_cursor(&cursor);
3224 hammer_done_transaction(&trans);
3225 lwkt_reltoken(&hmp->fs_token);
3228 * If we couldn't find any records or the records we did find were
3229 * all behind the requested offset, return failure. A forward
3230 * truncation can leave a hole w/ no on-disk records.
3232 if (last_offset == 0 || last_offset < ap->a_loffset)
3233 return (EOPNOTSUPP);
3236 * Figure out the block size at the requested offset and adjust
3237 * our limits so the cluster_read() does not create inappropriately
3238 * sized buffer cache buffers.
3240 blksize = hammer_blocksize(ap->a_loffset);
3241 if (hammer_blocksize(base_offset) != blksize) {
3242 base_offset = hammer_blockdemarc(base_offset, ap->a_loffset);
3244 if (last_offset != ap->a_loffset &&
3245 hammer_blocksize(last_offset - 1) != blksize) {
3246 last_offset = hammer_blockdemarc(ap->a_loffset,
3251 * Returning EOPNOTSUPP simply prevents the direct-IO optimization
3254 disk_offset = base_disk_offset + (ap->a_loffset - base_offset);
3256 if ((disk_offset & HAMMER_OFF_ZONE_MASK) != HAMMER_ZONE_LARGE_DATA) {
3258 * Only large-data zones can be direct-IOd
3261 } else if ((disk_offset & HAMMER_BUFMASK) ||
3262 (last_offset - ap->a_loffset) < blksize) {
3264 * doffsetp is not aligned or the forward run size does
3265 * not cover a whole buffer, disallow the direct I/O.
3272 *ap->a_doffsetp = disk_offset;
3274 *ap->a_runb = ap->a_loffset - base_offset;
3275 KKASSERT(*ap->a_runb >= 0);
3278 *ap->a_runp = last_offset - ap->a_loffset;
3279 KKASSERT(*ap->a_runp >= 0);
3287 * Write to a regular file. Because this is a strategy call the OS is
3288 * trying to actually get data onto the media.
3292 hammer_vop_strategy_write(struct vop_strategy_args *ap)
3294 hammer_record_t record;
3299 int blksize __debugvar;
3305 ip = ap->a_vp->v_data;
3308 blksize = hammer_blocksize(bio->bio_offset);
3309 KKASSERT(bp->b_bufsize == blksize);
3311 if (ip->flags & HAMMER_INODE_RO) {
3312 bp->b_error = EROFS;
3313 bp->b_flags |= B_ERROR;
3318 lwkt_gettoken(&hmp->fs_token);
3321 * Disallow swapcache operation on the vnode buffer if double
3322 * buffering is enabled, the swapcache will get the data via
3323 * the block device buffer.
3325 if (hammer_double_buffer)
3326 bp->b_flags |= B_NOTMETA;
3329 * Interlock with inode destruction (no in-kernel or directory
3330 * topology visibility). If we queue new IO while trying to
3331 * destroy the inode we can deadlock the vtrunc call in
3332 * hammer_inode_unloadable_check().
3334 * Besides, there's no point flushing a bp associated with an
3335 * inode that is being destroyed on-media and has no kernel
3338 if ((ip->flags | ip->sync_flags) &
3339 (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) {
3342 lwkt_reltoken(&hmp->fs_token);
3347 * Reserve space and issue a direct-write from the front-end.
3348 * NOTE: The direct_io code will hammer_bread/bcopy smaller
3351 * An in-memory record will be installed to reference the storage
3352 * until the flusher can get to it.
3354 * Since we own the high level bio the front-end will not try to
3355 * do a direct-read until the write completes.
3357 * NOTE: The only time we do not reserve a full-sized buffers
3358 * worth of data is if the file is small. We do not try to
3359 * allocate a fragment (from the small-data zone) at the end of
3360 * an otherwise large file as this can lead to wildly separated
3363 KKASSERT((bio->bio_offset & HAMMER_BUFMASK) == 0);
3364 KKASSERT(bio->bio_offset < ip->ino_data.size);
3365 if (bio->bio_offset || ip->ino_data.size > HAMMER_BUFSIZE / 2)
3366 bytes = bp->b_bufsize;
3368 bytes = ((int)ip->ino_data.size + 15) & ~15;
3370 record = hammer_ip_add_bulk(ip, bio->bio_offset, bp->b_data,
3374 * B_VFSFLAG1 indicates that a REDO_WRITE entry was generated
3375 * in hammer_vop_write(). We must flag the record so the proper
3376 * REDO_TERM_WRITE entry is generated during the flush.
3379 if (bp->b_flags & B_VFSFLAG1) {
3380 record->flags |= HAMMER_RECF_REDO;
3381 bp->b_flags &= ~B_VFSFLAG1;
3383 if (record->flags & HAMMER_RECF_DEDUPED) {
3385 hammer_ip_replace_bulk(hmp, record);
3388 hammer_io_direct_write(hmp, bio, record);
3390 if (ip->rsv_recs > 1 && hmp->rsv_recs > hammer_limit_recs)
3391 hammer_flush_inode(ip, 0);
3393 bp->b_bio2.bio_offset = NOOFFSET;
3394 bp->b_error = error;
3395 bp->b_flags |= B_ERROR;
3398 lwkt_reltoken(&hmp->fs_token);
3403 * dounlink - disconnect a directory entry
3405 * XXX whiteout support not really in yet
3408 hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
3409 struct vnode *dvp, struct ucred *cred,
3410 int flags, int isdir)
3412 struct namecache *ncp;
3416 struct hammer_cursor cursor;
3418 u_int32_t max_iterations;
3422 * Calculate the namekey and setup the key range for the scan. This
3423 * works kinda like a chained hash table where the lower 32 bits
3424 * of the namekey synthesize the chain.
3426 * The key range is inclusive of both key_beg and key_end.
3432 if (dip->flags & HAMMER_INODE_RO)
3435 namekey = hammer_directory_namekey(dip, ncp->nc_name, ncp->nc_nlen,
3438 hammer_init_cursor(trans, &cursor, &dip->cache[1], dip);
3439 cursor.key_beg.localization = dip->obj_localization +
3440 hammer_dir_localization(dip);
3441 cursor.key_beg.obj_id = dip->obj_id;
3442 cursor.key_beg.key = namekey;
3443 cursor.key_beg.create_tid = 0;
3444 cursor.key_beg.delete_tid = 0;
3445 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
3446 cursor.key_beg.obj_type = 0;
3448 cursor.key_end = cursor.key_beg;
3449 cursor.key_end.key += max_iterations;
3450 cursor.asof = dip->obj_asof;
3451 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
3454 * Scan all matching records (the chain), locate the one matching
3455 * the requested path component. info->last_error contains the
3456 * error code on search termination and could be 0, ENOENT, or
3459 * The hammer_ip_*() functions merge in-memory records with on-disk
3460 * records for the purposes of the search.
3462 error = hammer_ip_first(&cursor);
3464 while (error == 0) {
3465 error = hammer_ip_resolve_data(&cursor);
3468 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
3470 if (ncp->nc_nlen == nlen &&
3471 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
3474 error = hammer_ip_next(&cursor);
3478 * If all is ok we have to get the inode so we can adjust nlinks.
3479 * To avoid a deadlock with the flusher we must release the inode
3480 * lock on the directory when acquiring the inode for the entry.
3482 * If the target is a directory, it must be empty.
3485 hammer_unlock(&cursor.ip->lock);
3486 ip = hammer_get_inode(trans, dip, cursor.data->entry.obj_id,
3488 cursor.data->entry.localization,
3490 hammer_lock_sh(&cursor.ip->lock);
3491 if (error == ENOENT) {
3492 kprintf("HAMMER: WARNING: Removing "
3493 "dirent w/missing inode \"%s\"\n"
3494 "\tobj_id = %016llx\n",
3496 (long long)cursor.data->entry.obj_id);
3501 * If isdir >= 0 we validate that the entry is or is not a
3502 * directory. If isdir < 0 we don't care.
3504 if (error == 0 && isdir >= 0 && ip) {
3506 ip->ino_data.obj_type != HAMMER_OBJTYPE_DIRECTORY) {
3508 } else if (isdir == 0 &&
3509 ip->ino_data.obj_type == HAMMER_OBJTYPE_DIRECTORY) {
3515 * If we are trying to remove a directory the directory must
3518 * The check directory code can loop and deadlock/retry. Our
3519 * own cursor's node locks must be released to avoid a 3-way
3520 * deadlock with the flusher if the check directory code
3523 * If any changes whatsoever have been made to the cursor
3524 * set EDEADLK and retry.
3526 * WARNING: See warnings in hammer_unlock_cursor()
3529 if (error == 0 && ip && ip->ino_data.obj_type ==
3530 HAMMER_OBJTYPE_DIRECTORY) {
3531 hammer_unlock_cursor(&cursor);
3532 error = hammer_ip_check_directory_empty(trans, ip);
3533 hammer_lock_cursor(&cursor);
3534 if (cursor.flags & HAMMER_CURSOR_RETEST) {
3535 kprintf("HAMMER: Warning: avoided deadlock "
3543 * Delete the directory entry.
3545 * WARNING: hammer_ip_del_directory() may have to terminate
3546 * the cursor to avoid a deadlock. It is ok to call
3547 * hammer_done_cursor() twice.
3550 error = hammer_ip_del_directory(trans, &cursor,
3553 hammer_done_cursor(&cursor);
3556 * Tell the namecache that we are now unlinked.
3561 * NOTE: ip->vp, if non-NULL, cannot be directly
3562 * referenced without formally acquiring the
3563 * vp since the vp might have zero refs on it,
3564 * or in the middle of a reclaim, etc.
3566 * NOTE: The cache_setunresolved() can rip the vp
3567 * out from under us since the vp may not have
3568 * any refs, in which case ip->vp will be NULL
3571 while (ip && ip->vp) {
3574 error = hammer_get_vnode(ip, &vp);
3575 if (error == 0 && vp) {
3577 hammer_knote(ip->vp, NOTE_DELETE);
3578 cache_inval_vp(ip->vp, CINV_DESTROY);
3582 kprintf("Debug: HAMMER ip/vp race1 avoided\n");
3586 hammer_rel_inode(ip, 0);
3588 hammer_done_cursor(&cursor);
3590 if (error == EDEADLK)
3596 /************************************************************************
3597 * FIFO AND SPECFS OPS *
3598 ************************************************************************
3602 hammer_vop_fifoclose (struct vop_close_args *ap)
3604 /* XXX update itimes */
3605 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3609 hammer_vop_fiforead (struct vop_read_args *ap)
3613 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
3614 /* XXX update access time */
3619 hammer_vop_fifowrite (struct vop_write_args *ap)
3623 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
3624 /* XXX update access time */
3630 hammer_vop_fifokqfilter(struct vop_kqfilter_args *ap)
3634 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
3636 error = hammer_vop_kqfilter(ap);
3640 /************************************************************************
3642 ************************************************************************
3645 static void filt_hammerdetach(struct knote *kn);
3646 static int filt_hammerread(struct knote *kn, long hint);
3647 static int filt_hammerwrite(struct knote *kn, long hint);
3648 static int filt_hammervnode(struct knote *kn, long hint);
3650 static struct filterops hammerread_filtops =
3651 { FILTEROP_ISFD, NULL, filt_hammerdetach, filt_hammerread };
3652 static struct filterops hammerwrite_filtops =
3653 { FILTEROP_ISFD, NULL, filt_hammerdetach, filt_hammerwrite };
3654 static struct filterops hammervnode_filtops =
3655 { FILTEROP_ISFD, NULL, filt_hammerdetach, filt_hammervnode };
3659 hammer_vop_kqfilter(struct vop_kqfilter_args *ap)
3661 struct vnode *vp = ap->a_vp;
3662 struct knote *kn = ap->a_kn;
3664 switch (kn->kn_filter) {
3666 kn->kn_fop = &hammerread_filtops;
3669 kn->kn_fop = &hammerwrite_filtops;
3672 kn->kn_fop = &hammervnode_filtops;
3675 return (EOPNOTSUPP);
3678 kn->kn_hook = (caddr_t)vp;
3680 knote_insert(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
3686 filt_hammerdetach(struct knote *kn)
3688 struct vnode *vp = (void *)kn->kn_hook;
3690 knote_remove(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
3694 filt_hammerread(struct knote *kn, long hint)
3696 struct vnode *vp = (void *)kn->kn_hook;
3697 hammer_inode_t ip = VTOI(vp);
3698 hammer_mount_t hmp = ip->hmp;
3701 if (hint == NOTE_REVOKE) {
3702 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
3705 lwkt_gettoken(&hmp->fs_token); /* XXX use per-ip-token */
3706 off = ip->ino_data.size - kn->kn_fp->f_offset;
3707 kn->kn_data = (off < INTPTR_MAX) ? off : INTPTR_MAX;
3708 lwkt_reltoken(&hmp->fs_token);
3709 if (kn->kn_sfflags & NOTE_OLDAPI)
3711 return (kn->kn_data != 0);
3715 filt_hammerwrite(struct knote *kn, long hint)
3717 if (hint == NOTE_REVOKE)
3718 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
3724 filt_hammervnode(struct knote *kn, long hint)
3726 if (kn->kn_sfflags & hint)
3727 kn->kn_fflags |= hint;
3728 if (hint == NOTE_REVOKE) {
3729 kn->kn_flags |= (EV_EOF | EV_NODATA);
3732 return (kn->kn_fflags != 0);