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
34 * $DragonFly: src/sys/vfs/hammer/hammer_vnops.c,v 1.100 2008/09/28 05:04:21 dillon Exp $
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/fcntl.h>
41 #include <sys/namecache.h>
42 #include <sys/vnode.h>
43 #include <sys/lockf.h>
44 #include <sys/event.h>
46 #include <sys/dirent.h>
47 #include <vm/vm_extern.h>
48 #include <vfs/fifofs/fifo.h>
54 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
55 static int hammer_vop_fsync(struct vop_fsync_args *);
56 static int hammer_vop_read(struct vop_read_args *);
57 static int hammer_vop_write(struct vop_write_args *);
58 static int hammer_vop_access(struct vop_access_args *);
59 static int hammer_vop_advlock(struct vop_advlock_args *);
60 static int hammer_vop_close(struct vop_close_args *);
61 static int hammer_vop_ncreate(struct vop_ncreate_args *);
62 static int hammer_vop_getattr(struct vop_getattr_args *);
63 static int hammer_vop_nresolve(struct vop_nresolve_args *);
64 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
65 static int hammer_vop_nlink(struct vop_nlink_args *);
66 static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
67 static int hammer_vop_nmknod(struct vop_nmknod_args *);
68 static int hammer_vop_open(struct vop_open_args *);
69 static int hammer_vop_print(struct vop_print_args *);
70 static int hammer_vop_readdir(struct vop_readdir_args *);
71 static int hammer_vop_readlink(struct vop_readlink_args *);
72 static int hammer_vop_nremove(struct vop_nremove_args *);
73 static int hammer_vop_nrename(struct vop_nrename_args *);
74 static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
75 static int hammer_vop_setattr(struct vop_setattr_args *);
76 static int hammer_vop_strategy(struct vop_strategy_args *);
77 static int hammer_vop_bmap(struct vop_bmap_args *ap);
78 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
79 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
80 static int hammer_vop_ioctl(struct vop_ioctl_args *);
81 static int hammer_vop_mountctl(struct vop_mountctl_args *);
83 static int hammer_vop_fifoclose (struct vop_close_args *);
84 static int hammer_vop_fiforead (struct vop_read_args *);
85 static int hammer_vop_fifowrite (struct vop_write_args *);
87 static int hammer_vop_specclose (struct vop_close_args *);
88 static int hammer_vop_specread (struct vop_read_args *);
89 static int hammer_vop_specwrite (struct vop_write_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_setattr = hammer_vop_setattr,
119 .vop_bmap = hammer_vop_bmap,
120 .vop_strategy = hammer_vop_strategy,
121 .vop_nsymlink = hammer_vop_nsymlink,
122 .vop_nwhiteout = hammer_vop_nwhiteout,
123 .vop_ioctl = hammer_vop_ioctl,
124 .vop_mountctl = hammer_vop_mountctl
127 struct vop_ops hammer_spec_vops = {
128 .vop_default = spec_vnoperate,
129 .vop_fsync = hammer_vop_fsync,
130 .vop_read = hammer_vop_specread,
131 .vop_write = hammer_vop_specwrite,
132 .vop_access = hammer_vop_access,
133 .vop_close = hammer_vop_specclose,
134 .vop_getattr = hammer_vop_getattr,
135 .vop_inactive = hammer_vop_inactive,
136 .vop_reclaim = hammer_vop_reclaim,
137 .vop_setattr = hammer_vop_setattr
140 struct vop_ops hammer_fifo_vops = {
141 .vop_default = fifo_vnoperate,
142 .vop_fsync = hammer_vop_fsync,
143 .vop_read = hammer_vop_fiforead,
144 .vop_write = hammer_vop_fifowrite,
145 .vop_access = hammer_vop_access,
146 .vop_close = hammer_vop_fifoclose,
147 .vop_getattr = hammer_vop_getattr,
148 .vop_inactive = hammer_vop_inactive,
149 .vop_reclaim = hammer_vop_reclaim,
150 .vop_setattr = hammer_vop_setattr
153 #ifdef DEBUG_TRUNCATE
154 struct hammer_inode *HammerTruncIp;
157 static int hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
158 struct vnode *dvp, struct ucred *cred,
159 int flags, int isdir);
160 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
161 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
166 hammer_vop_vnoperate(struct vop_generic_args *)
168 return (VOCALL(&hammer_vnode_vops, ap));
173 * hammer_vop_fsync { vp, waitfor }
175 * fsync() an inode to disk and wait for it to be completely committed
176 * such that the information would not be undone if a crash occured after
181 hammer_vop_fsync(struct vop_fsync_args *ap)
183 hammer_inode_t ip = VTOI(ap->a_vp);
185 ++hammer_count_fsyncs;
186 vfsync(ap->a_vp, ap->a_waitfor, 1, NULL, NULL);
187 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
188 if (ap->a_waitfor == MNT_WAIT) {
190 hammer_wait_inode(ip);
191 vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY);
197 * hammer_vop_read { vp, uio, ioflag, cred }
201 hammer_vop_read(struct vop_read_args *ap)
203 struct hammer_transaction trans;
214 if (ap->a_vp->v_type != VREG)
221 * Allow the UIO's size to override the sequential heuristic.
223 blksize = hammer_blocksize(uio->uio_offset);
224 seqcount = (uio->uio_resid + (blksize - 1)) / blksize;
225 ioseqcount = ap->a_ioflag >> 16;
226 if (seqcount < ioseqcount)
227 seqcount = ioseqcount;
229 hammer_start_transaction(&trans, ip->hmp);
232 * Access the data typically in HAMMER_BUFSIZE blocks via the
233 * buffer cache, but HAMMER may use a variable block size based
236 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_data.size) {
240 blksize = hammer_blocksize(uio->uio_offset);
241 offset = (int)uio->uio_offset & (blksize - 1);
242 base_offset = uio->uio_offset - offset;
244 if (hammer_cluster_enable) {
246 * Use file_limit to prevent cluster_read() from
247 * creating buffers of the wrong block size past
250 file_limit = ip->ino_data.size;
251 if (base_offset < HAMMER_XDEMARC &&
252 file_limit > HAMMER_XDEMARC) {
253 file_limit = HAMMER_XDEMARC;
255 error = cluster_read(ap->a_vp,
256 file_limit, base_offset,
260 error = bread(ap->a_vp, base_offset, blksize, &bp);
263 kprintf("error %d\n", error);
268 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
269 n = blksize - offset;
270 if (n > uio->uio_resid)
272 if (n > ip->ino_data.size - uio->uio_offset)
273 n = (int)(ip->ino_data.size - uio->uio_offset);
274 error = uiomove((char *)bp->b_data + offset, n, uio);
276 /* data has a lower priority then meta-data */
277 bp->b_flags |= B_AGE;
281 hammer_stats_file_read += n;
283 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
284 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
285 ip->ino_data.atime = trans.time;
286 hammer_modify_inode(ip, HAMMER_INODE_ATIME);
288 hammer_done_transaction(&trans);
293 * hammer_vop_write { vp, uio, ioflag, cred }
297 hammer_vop_write(struct vop_write_args *ap)
299 struct hammer_transaction trans;
300 struct hammer_inode *ip;
312 if (ap->a_vp->v_type != VREG)
317 seqcount = ap->a_ioflag >> 16;
319 if (ip->flags & HAMMER_INODE_RO)
323 * Create a transaction to cover the operations we perform.
325 hammer_start_transaction(&trans, hmp);
331 if (ap->a_ioflag & IO_APPEND)
332 uio->uio_offset = ip->ino_data.size;
335 * Check for illegal write offsets. Valid range is 0...2^63-1.
337 * NOTE: the base_off assignment is required to work around what
338 * I consider to be a GCC-4 optimization bug.
340 if (uio->uio_offset < 0) {
341 hammer_done_transaction(&trans);
344 base_offset = uio->uio_offset + uio->uio_resid; /* work around gcc-4 */
345 if (uio->uio_resid > 0 && base_offset <= 0) {
346 hammer_done_transaction(&trans);
351 * Access the data typically in HAMMER_BUFSIZE blocks via the
352 * buffer cache, but HAMMER may use a variable block size based
355 while (uio->uio_resid > 0) {
360 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE)) != 0)
363 blksize = hammer_blocksize(uio->uio_offset);
366 * Do not allow HAMMER to blow out the buffer cache. Very
367 * large UIOs can lockout other processes due to bwillwrite()
370 * The hammer inode is not locked during these operations.
371 * The vnode is locked which can interfere with the pageout
372 * daemon for non-UIO_NOCOPY writes but should not interfere
373 * with the buffer cache. Even so, we cannot afford to
374 * allow the pageout daemon to build up too many dirty buffer
377 /*if (((int)uio->uio_offset & (blksize - 1)) == 0)*/
381 * Do not allow HAMMER to blow out system memory by
382 * accumulating too many records. Records are so well
383 * decoupled from the buffer cache that it is possible
384 * for userland to push data out to the media via
385 * direct-write, but build up the records queued to the
386 * backend faster then the backend can flush them out.
387 * HAMMER has hit its write limit but the frontend has
388 * no pushback to slow it down.
390 if (hmp->rsv_recs > hammer_limit_recs / 2) {
392 * Get the inode on the flush list
394 if (ip->rsv_recs >= 64)
395 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
396 else if (ip->rsv_recs >= 16)
397 hammer_flush_inode(ip, 0);
400 * Keep the flusher going if the system keeps
403 delta = hmp->count_newrecords -
404 hmp->last_newrecords;
405 if (delta < 0 || delta > hammer_limit_recs / 2) {
406 hmp->last_newrecords = hmp->count_newrecords;
407 hammer_sync_hmp(hmp, MNT_NOWAIT);
411 * If we have gotten behind start slowing
414 delta = (hmp->rsv_recs - hammer_limit_recs) *
415 hz / hammer_limit_recs;
417 tsleep(&trans, 0, "hmrslo", delta);
421 * Calculate the blocksize at the current offset and figure
422 * out how much we can actually write.
424 blkmask = blksize - 1;
425 offset = (int)uio->uio_offset & blkmask;
426 base_offset = uio->uio_offset & ~(int64_t)blkmask;
427 n = blksize - offset;
428 if (n > uio->uio_resid)
430 if (uio->uio_offset + n > ip->ino_data.size) {
431 vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
435 if (uio->uio_segflg == UIO_NOCOPY) {
437 * Issuing a write with the same data backing the
438 * buffer. Instantiate the buffer to collect the
439 * backing vm pages, then read-in any missing bits.
441 * This case is used by vop_stdputpages().
443 bp = getblk(ap->a_vp, base_offset,
444 blksize, GETBLK_BHEAVY, 0);
445 if ((bp->b_flags & B_CACHE) == 0) {
447 error = bread(ap->a_vp, base_offset,
450 } else if (offset == 0 && uio->uio_resid >= blksize) {
452 * Even though we are entirely overwriting the buffer
453 * we may still have to zero it out to avoid a
454 * mmap/write visibility issue.
456 bp = getblk(ap->a_vp, base_offset, blksize, GETBLK_BHEAVY, 0);
457 if ((bp->b_flags & B_CACHE) == 0)
459 } else if (base_offset >= ip->ino_data.size) {
461 * If the base offset of the buffer is beyond the
462 * file EOF, we don't have to issue a read.
464 bp = getblk(ap->a_vp, base_offset,
465 blksize, GETBLK_BHEAVY, 0);
469 * Partial overwrite, read in any missing bits then
470 * replace the portion being written.
472 error = bread(ap->a_vp, base_offset, blksize, &bp);
477 error = uiomove((char *)bp->b_data + offset,
482 * If we screwed up we have to undo any VM size changes we
488 vtruncbuf(ap->a_vp, ip->ino_data.size,
489 hammer_blocksize(ip->ino_data.size));
493 hammer_stats_file_write += n;
494 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
495 if (ip->ino_data.size < uio->uio_offset) {
496 ip->ino_data.size = uio->uio_offset;
497 flags = HAMMER_INODE_DDIRTY;
498 vnode_pager_setsize(ap->a_vp, ip->ino_data.size);
502 ip->ino_data.mtime = trans.time;
503 flags |= HAMMER_INODE_MTIME | HAMMER_INODE_BUFS;
504 hammer_modify_inode(ip, flags);
507 * Once we dirty the buffer any cached zone-X offset
508 * becomes invalid. HAMMER NOTE: no-history mode cannot
509 * allow overwriting over the same data sector unless
510 * we provide UNDOs for the old data, which we don't.
512 bp->b_bio2.bio_offset = NOOFFSET;
515 * Final buffer disposition.
517 bp->b_flags |= B_AGE;
518 if (ap->a_ioflag & IO_SYNC) {
520 } else if (ap->a_ioflag & IO_DIRECT) {
526 hammer_done_transaction(&trans);
531 * hammer_vop_access { vp, mode, cred }
535 hammer_vop_access(struct vop_access_args *ap)
537 struct hammer_inode *ip = VTOI(ap->a_vp);
542 ++hammer_stats_file_iopsr;
543 uid = hammer_to_unix_xid(&ip->ino_data.uid);
544 gid = hammer_to_unix_xid(&ip->ino_data.gid);
546 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
547 ip->ino_data.uflags);
552 * hammer_vop_advlock { vp, id, op, fl, flags }
556 hammer_vop_advlock(struct vop_advlock_args *ap)
558 hammer_inode_t ip = VTOI(ap->a_vp);
560 return (lf_advlock(ap, &ip->advlock, ip->ino_data.size));
564 * hammer_vop_close { vp, fflag }
568 hammer_vop_close(struct vop_close_args *ap)
570 /*hammer_inode_t ip = VTOI(ap->a_vp);*/
571 return (vop_stdclose(ap));
575 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
577 * The operating system has already ensured that the directory entry
578 * does not exist and done all appropriate namespace locking.
582 hammer_vop_ncreate(struct vop_ncreate_args *ap)
584 struct hammer_transaction trans;
585 struct hammer_inode *dip;
586 struct hammer_inode *nip;
587 struct nchandle *nch;
591 dip = VTOI(ap->a_dvp);
593 if (dip->flags & HAMMER_INODE_RO)
595 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
599 * Create a transaction to cover the operations we perform.
601 hammer_start_transaction(&trans, dip->hmp);
602 ++hammer_stats_file_iopsw;
605 * Create a new filesystem object of the requested type. The
606 * returned inode will be referenced and shared-locked to prevent
607 * it from being moved to the flusher.
610 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
613 hkprintf("hammer_create_inode error %d\n", error);
614 hammer_done_transaction(&trans);
620 * Add the new filesystem object to the directory. This will also
621 * bump the inode's link count.
623 error = hammer_ip_add_directory(&trans, dip,
624 nch->ncp->nc_name, nch->ncp->nc_nlen,
627 hkprintf("hammer_ip_add_directory error %d\n", error);
633 hammer_rel_inode(nip, 0);
634 hammer_done_transaction(&trans);
637 error = hammer_get_vnode(nip, ap->a_vpp);
638 hammer_done_transaction(&trans);
639 hammer_rel_inode(nip, 0);
641 cache_setunresolved(ap->a_nch);
642 cache_setvp(ap->a_nch, *ap->a_vpp);
649 * hammer_vop_getattr { vp, vap }
651 * Retrieve an inode's attribute information. When accessing inodes
652 * historically we fake the atime field to ensure consistent results.
653 * The atime field is stored in the B-Tree element and allowed to be
654 * updated without cycling the element.
658 hammer_vop_getattr(struct vop_getattr_args *ap)
660 struct hammer_inode *ip = VTOI(ap->a_vp);
661 struct vattr *vap = ap->a_vap;
664 * We want the fsid to be different when accessing a filesystem
665 * with different as-of's so programs like diff don't think
666 * the files are the same.
668 * We also want the fsid to be the same when comparing snapshots,
669 * or when comparing mirrors (which might be backed by different
670 * physical devices). HAMMER fsids are based on the PFS's
673 * XXX there is a chance of collision here. The va_fsid reported
674 * by stat is different from the more involved fsid used in the
677 ++hammer_stats_file_iopsr;
678 vap->va_fsid = ip->pfsm->fsid_udev ^ (u_int32_t)ip->obj_asof ^
679 (u_int32_t)(ip->obj_asof >> 32);
681 vap->va_fileid = ip->ino_leaf.base.obj_id;
682 vap->va_mode = ip->ino_data.mode;
683 vap->va_nlink = ip->ino_data.nlinks;
684 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
685 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
688 vap->va_size = ip->ino_data.size;
691 * Special case for @@PFS softlinks. The actual size of the
692 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
694 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_SOFTLINK &&
695 ip->ino_data.size == 10 &&
696 ip->obj_asof == HAMMER_MAX_TID &&
697 ip->obj_localization == 0 &&
698 strncmp(ip->ino_data.ext.symlink, "@@PFS", 5) == 0) {
703 * We must provide a consistent atime and mtime for snapshots
704 * so people can do a 'tar cf - ... | md5' on them and get
705 * consistent results.
707 if (ip->flags & HAMMER_INODE_RO) {
708 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_atime);
709 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_mtime);
711 hammer_time_to_timespec(ip->ino_data.atime, &vap->va_atime);
712 hammer_time_to_timespec(ip->ino_data.mtime, &vap->va_mtime);
714 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
715 vap->va_flags = ip->ino_data.uflags;
716 vap->va_gen = 1; /* hammer inums are unique for all time */
717 vap->va_blocksize = HAMMER_BUFSIZE;
718 if (ip->ino_data.size >= HAMMER_XDEMARC) {
719 vap->va_bytes = (ip->ino_data.size + HAMMER_XBUFMASK64) &
721 } else if (ip->ino_data.size > HAMMER_BUFSIZE / 2) {
722 vap->va_bytes = (ip->ino_data.size + HAMMER_BUFMASK64) &
725 vap->va_bytes = (ip->ino_data.size + 15) & ~15;
728 vap->va_type = hammer_get_vnode_type(ip->ino_data.obj_type);
729 vap->va_filerev = 0; /* XXX */
730 /* mtime uniquely identifies any adjustments made to the file XXX */
731 vap->va_fsmid = ip->ino_data.mtime;
732 vap->va_uid_uuid = ip->ino_data.uid;
733 vap->va_gid_uuid = ip->ino_data.gid;
734 vap->va_fsid_uuid = ip->hmp->fsid;
735 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
738 switch (ip->ino_data.obj_type) {
739 case HAMMER_OBJTYPE_CDEV:
740 case HAMMER_OBJTYPE_BDEV:
741 vap->va_rmajor = ip->ino_data.rmajor;
742 vap->va_rminor = ip->ino_data.rminor;
751 * hammer_vop_nresolve { nch, dvp, cred }
753 * Locate the requested directory entry.
757 hammer_vop_nresolve(struct vop_nresolve_args *ap)
759 struct hammer_transaction trans;
760 struct namecache *ncp;
764 struct hammer_cursor cursor;
773 u_int32_t localization;
776 * Misc initialization, plus handle as-of name extensions. Look for
777 * the '@@' extension. Note that as-of files and directories cannot
780 dip = VTOI(ap->a_dvp);
781 ncp = ap->a_nch->ncp;
782 asof = dip->obj_asof;
784 flags = dip->flags & HAMMER_INODE_RO;
787 hammer_simple_transaction(&trans, dip->hmp);
788 ++hammer_stats_file_iopsr;
790 for (i = 0; i < nlen; ++i) {
791 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
792 asof = hammer_str_to_tid(ncp->nc_name + i + 2,
793 &ispfs, &localization);
794 if (asof != HAMMER_MAX_TID)
795 flags |= HAMMER_INODE_RO;
802 * If this is a PFS softlink we dive into the PFS
804 if (ispfs && nlen == 0) {
805 ip = hammer_get_inode(&trans, dip, HAMMER_OBJID_ROOT,
809 error = hammer_get_vnode(ip, &vp);
810 hammer_rel_inode(ip, 0);
816 cache_setvp(ap->a_nch, vp);
823 * If there is no path component the time extension is relative to
827 ip = hammer_get_inode(&trans, dip, dip->obj_id,
828 asof, dip->obj_localization,
831 error = hammer_get_vnode(ip, &vp);
832 hammer_rel_inode(ip, 0);
838 cache_setvp(ap->a_nch, vp);
845 * Calculate the namekey and setup the key range for the scan. This
846 * works kinda like a chained hash table where the lower 32 bits
847 * of the namekey synthesize the chain.
849 * The key range is inclusive of both key_beg and key_end.
851 namekey = hammer_directory_namekey(ncp->nc_name, nlen);
853 error = hammer_init_cursor(&trans, &cursor, &dip->cache[1], dip);
854 cursor.key_beg.localization = dip->obj_localization +
855 HAMMER_LOCALIZE_MISC;
856 cursor.key_beg.obj_id = dip->obj_id;
857 cursor.key_beg.key = namekey;
858 cursor.key_beg.create_tid = 0;
859 cursor.key_beg.delete_tid = 0;
860 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
861 cursor.key_beg.obj_type = 0;
863 cursor.key_end = cursor.key_beg;
864 cursor.key_end.key |= 0xFFFFFFFFULL;
866 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
869 * Scan all matching records (the chain), locate the one matching
870 * the requested path component.
872 * The hammer_ip_*() functions merge in-memory records with on-disk
873 * records for the purposes of the search.
876 localization = HAMMER_DEF_LOCALIZATION;
879 error = hammer_ip_first(&cursor);
881 error = hammer_ip_resolve_data(&cursor);
884 if (nlen == cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF &&
885 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
886 obj_id = cursor.data->entry.obj_id;
887 localization = cursor.data->entry.localization;
890 error = hammer_ip_next(&cursor);
893 hammer_done_cursor(&cursor);
895 ip = hammer_get_inode(&trans, dip, obj_id,
899 error = hammer_get_vnode(ip, &vp);
900 hammer_rel_inode(ip, 0);
906 cache_setvp(ap->a_nch, vp);
909 } else if (error == ENOENT) {
910 cache_setvp(ap->a_nch, NULL);
913 hammer_done_transaction(&trans);
918 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
920 * Locate the parent directory of a directory vnode.
922 * dvp is referenced but not locked. *vpp must be returned referenced and
923 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
924 * at the root, instead it could indicate that the directory we were in was
927 * NOTE: as-of sequences are not linked into the directory structure. If
928 * we are at the root with a different asof then the mount point, reload
929 * the same directory with the mount point's asof. I'm not sure what this
930 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
931 * get confused, but it hasn't been tested.
935 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
937 struct hammer_transaction trans;
938 struct hammer_inode *dip;
939 struct hammer_inode *ip;
940 int64_t parent_obj_id;
941 u_int32_t parent_obj_localization;
945 dip = VTOI(ap->a_dvp);
946 asof = dip->obj_asof;
949 * Whos are parent? This could be the root of a pseudo-filesystem
950 * whos parent is in another localization domain.
952 parent_obj_id = dip->ino_data.parent_obj_id;
953 if (dip->obj_id == HAMMER_OBJID_ROOT)
954 parent_obj_localization = dip->ino_data.ext.obj.parent_obj_localization;
956 parent_obj_localization = dip->obj_localization;
958 if (parent_obj_id == 0) {
959 if (dip->obj_id == HAMMER_OBJID_ROOT &&
960 asof != dip->hmp->asof) {
961 parent_obj_id = dip->obj_id;
962 asof = dip->hmp->asof;
963 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
964 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
972 hammer_simple_transaction(&trans, dip->hmp);
973 ++hammer_stats_file_iopsr;
975 ip = hammer_get_inode(&trans, dip, parent_obj_id,
976 asof, parent_obj_localization,
979 error = hammer_get_vnode(ip, ap->a_vpp);
980 hammer_rel_inode(ip, 0);
984 hammer_done_transaction(&trans);
989 * hammer_vop_nlink { nch, dvp, vp, cred }
993 hammer_vop_nlink(struct vop_nlink_args *ap)
995 struct hammer_transaction trans;
996 struct hammer_inode *dip;
997 struct hammer_inode *ip;
998 struct nchandle *nch;
1001 if (ap->a_dvp->v_mount != ap->a_vp->v_mount)
1005 dip = VTOI(ap->a_dvp);
1006 ip = VTOI(ap->a_vp);
1008 if (dip->obj_localization != ip->obj_localization)
1011 if (dip->flags & HAMMER_INODE_RO)
1013 if (ip->flags & HAMMER_INODE_RO)
1015 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1019 * Create a transaction to cover the operations we perform.
1021 hammer_start_transaction(&trans, dip->hmp);
1022 ++hammer_stats_file_iopsw;
1025 * Add the filesystem object to the directory. Note that neither
1026 * dip nor ip are referenced or locked, but their vnodes are
1027 * referenced. This function will bump the inode's link count.
1029 error = hammer_ip_add_directory(&trans, dip,
1030 nch->ncp->nc_name, nch->ncp->nc_nlen,
1037 cache_setunresolved(nch);
1038 cache_setvp(nch, ap->a_vp);
1040 hammer_done_transaction(&trans);
1045 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1047 * The operating system has already ensured that the directory entry
1048 * does not exist and done all appropriate namespace locking.
1052 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
1054 struct hammer_transaction trans;
1055 struct hammer_inode *dip;
1056 struct hammer_inode *nip;
1057 struct nchandle *nch;
1061 dip = VTOI(ap->a_dvp);
1063 if (dip->flags & HAMMER_INODE_RO)
1065 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1069 * Create a transaction to cover the operations we perform.
1071 hammer_start_transaction(&trans, dip->hmp);
1072 ++hammer_stats_file_iopsw;
1075 * Create a new filesystem object of the requested type. The
1076 * returned inode will be referenced but not locked.
1078 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1081 hkprintf("hammer_mkdir error %d\n", error);
1082 hammer_done_transaction(&trans);
1087 * Add the new filesystem object to the directory. This will also
1088 * bump the inode's link count.
1090 error = hammer_ip_add_directory(&trans, dip,
1091 nch->ncp->nc_name, nch->ncp->nc_nlen,
1094 hkprintf("hammer_mkdir (add) error %d\n", error);
1100 hammer_rel_inode(nip, 0);
1103 error = hammer_get_vnode(nip, ap->a_vpp);
1104 hammer_rel_inode(nip, 0);
1106 cache_setunresolved(ap->a_nch);
1107 cache_setvp(ap->a_nch, *ap->a_vpp);
1110 hammer_done_transaction(&trans);
1115 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1117 * The operating system has already ensured that the directory entry
1118 * does not exist and done all appropriate namespace locking.
1122 hammer_vop_nmknod(struct vop_nmknod_args *ap)
1124 struct hammer_transaction trans;
1125 struct hammer_inode *dip;
1126 struct hammer_inode *nip;
1127 struct nchandle *nch;
1131 dip = VTOI(ap->a_dvp);
1133 if (dip->flags & HAMMER_INODE_RO)
1135 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1139 * Create a transaction to cover the operations we perform.
1141 hammer_start_transaction(&trans, dip->hmp);
1142 ++hammer_stats_file_iopsw;
1145 * Create a new filesystem object of the requested type. The
1146 * returned inode will be referenced but not locked.
1148 * If mknod specifies a directory a pseudo-fs is created.
1150 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1153 hammer_done_transaction(&trans);
1159 * Add the new filesystem object to the directory. This will also
1160 * bump the inode's link count.
1162 error = hammer_ip_add_directory(&trans, dip,
1163 nch->ncp->nc_name, nch->ncp->nc_nlen,
1170 hammer_rel_inode(nip, 0);
1173 error = hammer_get_vnode(nip, ap->a_vpp);
1174 hammer_rel_inode(nip, 0);
1176 cache_setunresolved(ap->a_nch);
1177 cache_setvp(ap->a_nch, *ap->a_vpp);
1180 hammer_done_transaction(&trans);
1185 * hammer_vop_open { vp, mode, cred, fp }
1189 hammer_vop_open(struct vop_open_args *ap)
1193 ++hammer_stats_file_iopsr;
1194 ip = VTOI(ap->a_vp);
1196 if ((ap->a_mode & FWRITE) && (ip->flags & HAMMER_INODE_RO))
1198 return(vop_stdopen(ap));
1202 * hammer_vop_print { vp }
1206 hammer_vop_print(struct vop_print_args *ap)
1212 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
1216 hammer_vop_readdir(struct vop_readdir_args *ap)
1218 struct hammer_transaction trans;
1219 struct hammer_cursor cursor;
1220 struct hammer_inode *ip;
1222 hammer_base_elm_t base;
1231 ++hammer_stats_file_iopsr;
1232 ip = VTOI(ap->a_vp);
1234 saveoff = uio->uio_offset;
1236 if (ap->a_ncookies) {
1237 ncookies = uio->uio_resid / 16 + 1;
1238 if (ncookies > 1024)
1240 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1248 hammer_simple_transaction(&trans, ip->hmp);
1251 * Handle artificial entries
1255 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1259 cookies[cookie_index] = saveoff;
1262 if (cookie_index == ncookies)
1266 if (ip->ino_data.parent_obj_id) {
1267 r = vop_write_dirent(&error, uio,
1268 ip->ino_data.parent_obj_id,
1271 r = vop_write_dirent(&error, uio,
1272 ip->obj_id, DT_DIR, 2, "..");
1277 cookies[cookie_index] = saveoff;
1280 if (cookie_index == ncookies)
1285 * Key range (begin and end inclusive) to scan. Directory keys
1286 * directly translate to a 64 bit 'seek' position.
1288 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1289 cursor.key_beg.localization = ip->obj_localization +
1290 HAMMER_LOCALIZE_MISC;
1291 cursor.key_beg.obj_id = ip->obj_id;
1292 cursor.key_beg.create_tid = 0;
1293 cursor.key_beg.delete_tid = 0;
1294 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1295 cursor.key_beg.obj_type = 0;
1296 cursor.key_beg.key = saveoff;
1298 cursor.key_end = cursor.key_beg;
1299 cursor.key_end.key = HAMMER_MAX_KEY;
1300 cursor.asof = ip->obj_asof;
1301 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1303 error = hammer_ip_first(&cursor);
1305 while (error == 0) {
1306 error = hammer_ip_resolve_data(&cursor);
1309 base = &cursor.leaf->base;
1310 saveoff = base->key;
1311 KKASSERT(cursor.leaf->data_len > HAMMER_ENTRY_NAME_OFF);
1313 if (base->obj_id != ip->obj_id)
1314 panic("readdir: bad record at %p", cursor.node);
1317 * Convert pseudo-filesystems into softlinks
1319 dtype = hammer_get_dtype(cursor.leaf->base.obj_type);
1320 r = vop_write_dirent(
1321 &error, uio, cursor.data->entry.obj_id,
1323 cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF ,
1324 (void *)cursor.data->entry.name);
1329 cookies[cookie_index] = base->key;
1331 if (cookie_index == ncookies)
1333 error = hammer_ip_next(&cursor);
1335 hammer_done_cursor(&cursor);
1338 hammer_done_transaction(&trans);
1341 *ap->a_eofflag = (error == ENOENT);
1342 uio->uio_offset = saveoff;
1343 if (error && cookie_index == 0) {
1344 if (error == ENOENT)
1347 kfree(cookies, M_TEMP);
1348 *ap->a_ncookies = 0;
1349 *ap->a_cookies = NULL;
1352 if (error == ENOENT)
1355 *ap->a_ncookies = cookie_index;
1356 *ap->a_cookies = cookies;
1363 * hammer_vop_readlink { vp, uio, cred }
1367 hammer_vop_readlink(struct vop_readlink_args *ap)
1369 struct hammer_transaction trans;
1370 struct hammer_cursor cursor;
1371 struct hammer_inode *ip;
1373 u_int32_t localization;
1374 hammer_pseudofs_inmem_t pfsm;
1377 ip = VTOI(ap->a_vp);
1380 * Shortcut if the symlink data was stuffed into ino_data.
1382 * Also expand special "@@PFS%05d" softlinks (expansion only
1383 * occurs for non-historical (current) accesses made from the
1384 * primary filesystem).
1386 if (ip->ino_data.size <= HAMMER_INODE_BASESYMLEN) {
1390 ptr = ip->ino_data.ext.symlink;
1391 bytes = (int)ip->ino_data.size;
1393 ip->obj_asof == HAMMER_MAX_TID &&
1394 ip->obj_localization == 0 &&
1395 strncmp(ptr, "@@PFS", 5) == 0) {
1396 hammer_simple_transaction(&trans, ip->hmp);
1397 bcopy(ptr + 5, buf, 5);
1399 localization = strtoul(buf, NULL, 10) << 16;
1400 pfsm = hammer_load_pseudofs(&trans, localization,
1403 if (pfsm->pfsd.mirror_flags &
1404 HAMMER_PFSD_SLAVE) {
1405 ksnprintf(buf, sizeof(buf),
1407 pfsm->pfsd.sync_end_tid,
1408 localization >> 16);
1410 ksnprintf(buf, sizeof(buf),
1413 localization >> 16);
1416 bytes = strlen(buf);
1419 hammer_rel_pseudofs(trans.hmp, pfsm);
1420 hammer_done_transaction(&trans);
1422 error = uiomove(ptr, bytes, ap->a_uio);
1429 hammer_simple_transaction(&trans, ip->hmp);
1430 ++hammer_stats_file_iopsr;
1431 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1434 * Key range (begin and end inclusive) to scan. Directory keys
1435 * directly translate to a 64 bit 'seek' position.
1437 cursor.key_beg.localization = ip->obj_localization +
1438 HAMMER_LOCALIZE_MISC;
1439 cursor.key_beg.obj_id = ip->obj_id;
1440 cursor.key_beg.create_tid = 0;
1441 cursor.key_beg.delete_tid = 0;
1442 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1443 cursor.key_beg.obj_type = 0;
1444 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1445 cursor.asof = ip->obj_asof;
1446 cursor.flags |= HAMMER_CURSOR_ASOF;
1448 error = hammer_ip_lookup(&cursor);
1450 error = hammer_ip_resolve_data(&cursor);
1452 KKASSERT(cursor.leaf->data_len >=
1453 HAMMER_SYMLINK_NAME_OFF);
1454 error = uiomove(cursor.data->symlink.name,
1455 cursor.leaf->data_len -
1456 HAMMER_SYMLINK_NAME_OFF,
1460 hammer_done_cursor(&cursor);
1461 hammer_done_transaction(&trans);
1466 * hammer_vop_nremove { nch, dvp, cred }
1470 hammer_vop_nremove(struct vop_nremove_args *ap)
1472 struct hammer_transaction trans;
1473 struct hammer_inode *dip;
1476 dip = VTOI(ap->a_dvp);
1478 if (hammer_nohistory(dip) == 0 &&
1479 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1483 hammer_start_transaction(&trans, dip->hmp);
1484 ++hammer_stats_file_iopsw;
1485 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 0);
1486 hammer_done_transaction(&trans);
1492 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1496 hammer_vop_nrename(struct vop_nrename_args *ap)
1498 struct hammer_transaction trans;
1499 struct namecache *fncp;
1500 struct namecache *tncp;
1501 struct hammer_inode *fdip;
1502 struct hammer_inode *tdip;
1503 struct hammer_inode *ip;
1504 struct hammer_cursor cursor;
1508 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1510 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1513 fdip = VTOI(ap->a_fdvp);
1514 tdip = VTOI(ap->a_tdvp);
1515 fncp = ap->a_fnch->ncp;
1516 tncp = ap->a_tnch->ncp;
1517 ip = VTOI(fncp->nc_vp);
1518 KKASSERT(ip != NULL);
1520 if (fdip->obj_localization != tdip->obj_localization)
1522 if (fdip->obj_localization != ip->obj_localization)
1525 if (fdip->flags & HAMMER_INODE_RO)
1527 if (tdip->flags & HAMMER_INODE_RO)
1529 if (ip->flags & HAMMER_INODE_RO)
1531 if ((error = hammer_checkspace(fdip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1534 hammer_start_transaction(&trans, fdip->hmp);
1535 ++hammer_stats_file_iopsw;
1538 * Remove tncp from the target directory and then link ip as
1539 * tncp. XXX pass trans to dounlink
1541 * Force the inode sync-time to match the transaction so it is
1542 * in-sync with the creation of the target directory entry.
1544 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp,
1546 if (error == 0 || error == ENOENT) {
1547 error = hammer_ip_add_directory(&trans, tdip,
1548 tncp->nc_name, tncp->nc_nlen,
1551 ip->ino_data.parent_obj_id = tdip->obj_id;
1552 hammer_modify_inode(ip, HAMMER_INODE_DDIRTY);
1556 goto failed; /* XXX */
1559 * Locate the record in the originating directory and remove it.
1561 * Calculate the namekey and setup the key range for the scan. This
1562 * works kinda like a chained hash table where the lower 32 bits
1563 * of the namekey synthesize the chain.
1565 * The key range is inclusive of both key_beg and key_end.
1567 namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
1569 hammer_init_cursor(&trans, &cursor, &fdip->cache[1], fdip);
1570 cursor.key_beg.localization = fdip->obj_localization +
1571 HAMMER_LOCALIZE_MISC;
1572 cursor.key_beg.obj_id = fdip->obj_id;
1573 cursor.key_beg.key = namekey;
1574 cursor.key_beg.create_tid = 0;
1575 cursor.key_beg.delete_tid = 0;
1576 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1577 cursor.key_beg.obj_type = 0;
1579 cursor.key_end = cursor.key_beg;
1580 cursor.key_end.key |= 0xFFFFFFFFULL;
1581 cursor.asof = fdip->obj_asof;
1582 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1585 * Scan all matching records (the chain), locate the one matching
1586 * the requested path component.
1588 * The hammer_ip_*() functions merge in-memory records with on-disk
1589 * records for the purposes of the search.
1591 error = hammer_ip_first(&cursor);
1592 while (error == 0) {
1593 if (hammer_ip_resolve_data(&cursor) != 0)
1595 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
1597 if (fncp->nc_nlen == nlen &&
1598 bcmp(fncp->nc_name, cursor.data->entry.name, nlen) == 0) {
1601 error = hammer_ip_next(&cursor);
1605 * If all is ok we have to get the inode so we can adjust nlinks.
1607 * WARNING: hammer_ip_del_directory() may have to terminate the
1608 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
1612 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1615 * XXX A deadlock here will break rename's atomicy for the purposes
1616 * of crash recovery.
1618 if (error == EDEADLK) {
1619 hammer_done_cursor(&cursor);
1624 * Cleanup and tell the kernel that the rename succeeded.
1626 hammer_done_cursor(&cursor);
1628 cache_rename(ap->a_fnch, ap->a_tnch);
1631 hammer_done_transaction(&trans);
1636 * hammer_vop_nrmdir { nch, dvp, cred }
1640 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1642 struct hammer_transaction trans;
1643 struct hammer_inode *dip;
1646 dip = VTOI(ap->a_dvp);
1648 if (hammer_nohistory(dip) == 0 &&
1649 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1653 hammer_start_transaction(&trans, dip->hmp);
1654 ++hammer_stats_file_iopsw;
1655 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 1);
1656 hammer_done_transaction(&trans);
1662 * hammer_vop_setattr { vp, vap, cred }
1666 hammer_vop_setattr(struct vop_setattr_args *ap)
1668 struct hammer_transaction trans;
1670 struct hammer_inode *ip;
1675 int64_t aligned_size;
1679 ip = ap->a_vp->v_data;
1682 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1684 if (ip->flags & HAMMER_INODE_RO)
1686 if (hammer_nohistory(ip) == 0 &&
1687 (error = hammer_checkspace(ip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1691 hammer_start_transaction(&trans, ip->hmp);
1692 ++hammer_stats_file_iopsw;
1695 if (vap->va_flags != VNOVAL) {
1696 flags = ip->ino_data.uflags;
1697 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1698 hammer_to_unix_xid(&ip->ino_data.uid),
1701 if (ip->ino_data.uflags != flags) {
1702 ip->ino_data.uflags = flags;
1703 modflags |= HAMMER_INODE_DDIRTY;
1705 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1712 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1716 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
1717 mode_t cur_mode = ip->ino_data.mode;
1718 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1719 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1723 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
1725 &cur_uid, &cur_gid, &cur_mode);
1727 hammer_guid_to_uuid(&uuid_uid, cur_uid);
1728 hammer_guid_to_uuid(&uuid_gid, cur_gid);
1729 if (bcmp(&uuid_uid, &ip->ino_data.uid,
1730 sizeof(uuid_uid)) ||
1731 bcmp(&uuid_gid, &ip->ino_data.gid,
1732 sizeof(uuid_gid)) ||
1733 ip->ino_data.mode != cur_mode
1735 ip->ino_data.uid = uuid_uid;
1736 ip->ino_data.gid = uuid_gid;
1737 ip->ino_data.mode = cur_mode;
1739 modflags |= HAMMER_INODE_DDIRTY;
1742 while (vap->va_size != VNOVAL && ip->ino_data.size != vap->va_size) {
1743 switch(ap->a_vp->v_type) {
1745 if (vap->va_size == ip->ino_data.size)
1748 * XXX break atomicy, we can deadlock the backend
1749 * if we do not release the lock. Probably not a
1752 blksize = hammer_blocksize(vap->va_size);
1753 if (vap->va_size < ip->ino_data.size) {
1754 vtruncbuf(ap->a_vp, vap->va_size, blksize);
1757 vnode_pager_setsize(ap->a_vp, vap->va_size);
1760 ip->ino_data.size = vap->va_size;
1761 modflags |= HAMMER_INODE_DDIRTY;
1764 * on-media truncation is cached in the inode until
1765 * the inode is synchronized.
1768 hammer_ip_frontend_trunc(ip, vap->va_size);
1769 #ifdef DEBUG_TRUNCATE
1770 if (HammerTruncIp == NULL)
1773 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1774 ip->flags |= HAMMER_INODE_TRUNCATED;
1775 ip->trunc_off = vap->va_size;
1776 #ifdef DEBUG_TRUNCATE
1777 if (ip == HammerTruncIp)
1778 kprintf("truncate1 %016llx\n", ip->trunc_off);
1780 } else if (ip->trunc_off > vap->va_size) {
1781 ip->trunc_off = vap->va_size;
1782 #ifdef DEBUG_TRUNCATE
1783 if (ip == HammerTruncIp)
1784 kprintf("truncate2 %016llx\n", ip->trunc_off);
1787 #ifdef DEBUG_TRUNCATE
1788 if (ip == HammerTruncIp)
1789 kprintf("truncate3 %016llx (ignored)\n", vap->va_size);
1795 * If truncating we have to clean out a portion of
1796 * the last block on-disk. We do this in the
1797 * front-end buffer cache.
1799 aligned_size = (vap->va_size + (blksize - 1)) &
1800 ~(int64_t)(blksize - 1);
1801 if (truncating && vap->va_size < aligned_size) {
1805 aligned_size -= blksize;
1807 offset = (int)vap->va_size & (blksize - 1);
1808 error = bread(ap->a_vp, aligned_size,
1810 hammer_ip_frontend_trunc(ip, aligned_size);
1812 bzero(bp->b_data + offset,
1814 /* must de-cache direct-io offset */
1815 bp->b_bio2.bio_offset = NOOFFSET;
1818 kprintf("ERROR %d\n", error);
1824 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1825 ip->flags |= HAMMER_INODE_TRUNCATED;
1826 ip->trunc_off = vap->va_size;
1827 } else if (ip->trunc_off > vap->va_size) {
1828 ip->trunc_off = vap->va_size;
1830 hammer_ip_frontend_trunc(ip, vap->va_size);
1831 ip->ino_data.size = vap->va_size;
1832 modflags |= HAMMER_INODE_DDIRTY;
1840 if (vap->va_atime.tv_sec != VNOVAL) {
1841 ip->ino_data.atime =
1842 hammer_timespec_to_time(&vap->va_atime);
1843 modflags |= HAMMER_INODE_ATIME;
1845 if (vap->va_mtime.tv_sec != VNOVAL) {
1846 ip->ino_data.mtime =
1847 hammer_timespec_to_time(&vap->va_mtime);
1848 modflags |= HAMMER_INODE_MTIME;
1850 if (vap->va_mode != (mode_t)VNOVAL) {
1851 mode_t cur_mode = ip->ino_data.mode;
1852 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1853 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1855 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
1856 cur_uid, cur_gid, &cur_mode);
1857 if (error == 0 && ip->ino_data.mode != cur_mode) {
1858 ip->ino_data.mode = cur_mode;
1859 modflags |= HAMMER_INODE_DDIRTY;
1864 hammer_modify_inode(ip, modflags);
1865 hammer_done_transaction(&trans);
1870 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1874 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
1876 struct hammer_transaction trans;
1877 struct hammer_inode *dip;
1878 struct hammer_inode *nip;
1879 struct nchandle *nch;
1880 hammer_record_t record;
1884 ap->a_vap->va_type = VLNK;
1887 dip = VTOI(ap->a_dvp);
1889 if (dip->flags & HAMMER_INODE_RO)
1891 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1895 * Create a transaction to cover the operations we perform.
1897 hammer_start_transaction(&trans, dip->hmp);
1898 ++hammer_stats_file_iopsw;
1901 * Create a new filesystem object of the requested type. The
1902 * returned inode will be referenced but not locked.
1905 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1908 hammer_done_transaction(&trans);
1914 * Add a record representing the symlink. symlink stores the link
1915 * as pure data, not a string, and is no \0 terminated.
1918 bytes = strlen(ap->a_target);
1920 if (bytes <= HAMMER_INODE_BASESYMLEN) {
1921 bcopy(ap->a_target, nip->ino_data.ext.symlink, bytes);
1923 record = hammer_alloc_mem_record(nip, bytes);
1924 record->type = HAMMER_MEM_RECORD_GENERAL;
1926 record->leaf.base.localization = nip->obj_localization +
1927 HAMMER_LOCALIZE_MISC;
1928 record->leaf.base.key = HAMMER_FIXKEY_SYMLINK;
1929 record->leaf.base.rec_type = HAMMER_RECTYPE_FIX;
1930 record->leaf.data_len = bytes;
1931 KKASSERT(HAMMER_SYMLINK_NAME_OFF == 0);
1932 bcopy(ap->a_target, record->data->symlink.name, bytes);
1933 error = hammer_ip_add_record(&trans, record);
1937 * Set the file size to the length of the link.
1940 nip->ino_data.size = bytes;
1941 hammer_modify_inode(nip, HAMMER_INODE_DDIRTY);
1945 error = hammer_ip_add_directory(&trans, dip, nch->ncp->nc_name,
1946 nch->ncp->nc_nlen, nip);
1952 hammer_rel_inode(nip, 0);
1955 error = hammer_get_vnode(nip, ap->a_vpp);
1956 hammer_rel_inode(nip, 0);
1958 cache_setunresolved(ap->a_nch);
1959 cache_setvp(ap->a_nch, *ap->a_vpp);
1962 hammer_done_transaction(&trans);
1967 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
1971 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
1973 struct hammer_transaction trans;
1974 struct hammer_inode *dip;
1977 dip = VTOI(ap->a_dvp);
1979 if (hammer_nohistory(dip) == 0 &&
1980 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0) {
1984 hammer_start_transaction(&trans, dip->hmp);
1985 ++hammer_stats_file_iopsw;
1986 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
1987 ap->a_cred, ap->a_flags, -1);
1988 hammer_done_transaction(&trans);
1994 * hammer_vop_ioctl { vp, command, data, fflag, cred }
1998 hammer_vop_ioctl(struct vop_ioctl_args *ap)
2000 struct hammer_inode *ip = ap->a_vp->v_data;
2002 ++hammer_stats_file_iopsr;
2003 return(hammer_ioctl(ip, ap->a_command, ap->a_data,
2004 ap->a_fflag, ap->a_cred));
2009 hammer_vop_mountctl(struct vop_mountctl_args *ap)
2014 mp = ap->a_head.a_ops->head.vv_mount;
2017 case MOUNTCTL_SET_EXPORT:
2018 if (ap->a_ctllen != sizeof(struct export_args))
2021 error = hammer_vfs_export(mp, ap->a_op,
2022 (const struct export_args *)ap->a_ctl);
2025 error = journal_mountctl(ap);
2032 * hammer_vop_strategy { vp, bio }
2034 * Strategy call, used for regular file read & write only. Note that the
2035 * bp may represent a cluster.
2037 * To simplify operation and allow better optimizations in the future,
2038 * this code does not make any assumptions with regards to buffer alignment
2043 hammer_vop_strategy(struct vop_strategy_args *ap)
2048 bp = ap->a_bio->bio_buf;
2052 error = hammer_vop_strategy_read(ap);
2055 error = hammer_vop_strategy_write(ap);
2058 bp->b_error = error = EINVAL;
2059 bp->b_flags |= B_ERROR;
2067 * Read from a regular file. Iterate the related records and fill in the
2068 * BIO/BUF. Gaps are zero-filled.
2070 * The support code in hammer_object.c should be used to deal with mixed
2071 * in-memory and on-disk records.
2073 * NOTE: Can be called from the cluster code with an oversized buf.
2079 hammer_vop_strategy_read(struct vop_strategy_args *ap)
2081 struct hammer_transaction trans;
2082 struct hammer_inode *ip;
2083 struct hammer_cursor cursor;
2084 hammer_base_elm_t base;
2085 hammer_off_t disk_offset;
2099 ip = ap->a_vp->v_data;
2102 * The zone-2 disk offset may have been set by the cluster code via
2103 * a BMAP operation, or else should be NOOFFSET.
2105 * Checking the high bits for a match against zone-2 should suffice.
2107 nbio = push_bio(bio);
2108 if ((nbio->bio_offset & HAMMER_OFF_ZONE_MASK) ==
2109 HAMMER_ZONE_LARGE_DATA) {
2110 error = hammer_io_direct_read(ip->hmp, nbio, NULL);
2115 * Well, that sucked. Do it the hard way. If all the stars are
2116 * aligned we may still be able to issue a direct-read.
2118 hammer_simple_transaction(&trans, ip->hmp);
2119 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2122 * Key range (begin and end inclusive) to scan. Note that the key's
2123 * stored in the actual records represent BASE+LEN, not BASE. The
2124 * first record containing bio_offset will have a key > bio_offset.
2126 cursor.key_beg.localization = ip->obj_localization +
2127 HAMMER_LOCALIZE_MISC;
2128 cursor.key_beg.obj_id = ip->obj_id;
2129 cursor.key_beg.create_tid = 0;
2130 cursor.key_beg.delete_tid = 0;
2131 cursor.key_beg.obj_type = 0;
2132 cursor.key_beg.key = bio->bio_offset + 1;
2133 cursor.asof = ip->obj_asof;
2134 cursor.flags |= HAMMER_CURSOR_ASOF;
2136 cursor.key_end = cursor.key_beg;
2137 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2139 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_DBFILE) {
2140 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
2141 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
2142 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2146 ran_end = bio->bio_offset + bp->b_bufsize;
2147 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2148 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2149 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2150 if (tmp64 < ran_end)
2151 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2153 cursor.key_end.key = ran_end + MAXPHYS + 1;
2155 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2157 error = hammer_ip_first(&cursor);
2160 while (error == 0) {
2162 * Get the base file offset of the record. The key for
2163 * data records is (base + bytes) rather then (base).
2165 base = &cursor.leaf->base;
2166 rec_offset = base->key - cursor.leaf->data_len;
2169 * Calculate the gap, if any, and zero-fill it.
2171 * n is the offset of the start of the record verses our
2172 * current seek offset in the bio.
2174 n = (int)(rec_offset - (bio->bio_offset + boff));
2176 if (n > bp->b_bufsize - boff)
2177 n = bp->b_bufsize - boff;
2178 bzero((char *)bp->b_data + boff, n);
2184 * Calculate the data offset in the record and the number
2185 * of bytes we can copy.
2187 * There are two degenerate cases. First, boff may already
2188 * be at bp->b_bufsize. Secondly, the data offset within
2189 * the record may exceed the record's size.
2193 n = cursor.leaf->data_len - roff;
2195 kprintf("strategy_read: bad n=%d roff=%d\n", n, roff);
2197 } else if (n > bp->b_bufsize - boff) {
2198 n = bp->b_bufsize - boff;
2202 * Deal with cached truncations. This cool bit of code
2203 * allows truncate()/ftruncate() to avoid having to sync
2206 * If the frontend is truncated then all backend records are
2207 * subject to the frontend's truncation.
2209 * If the backend is truncated then backend records on-disk
2210 * (but not in-memory) are subject to the backend's
2211 * truncation. In-memory records owned by the backend
2212 * represent data written after the truncation point on the
2213 * backend and must not be truncated.
2215 * Truncate operations deal with frontend buffer cache
2216 * buffers and frontend-owned in-memory records synchronously.
2218 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2219 if (hammer_cursor_ondisk(&cursor) ||
2220 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2221 if (ip->trunc_off <= rec_offset)
2223 else if (ip->trunc_off < rec_offset + n)
2224 n = (int)(ip->trunc_off - rec_offset);
2227 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2228 if (hammer_cursor_ondisk(&cursor)) {
2229 if (ip->sync_trunc_off <= rec_offset)
2231 else if (ip->sync_trunc_off < rec_offset + n)
2232 n = (int)(ip->sync_trunc_off - rec_offset);
2237 * Try to issue a direct read into our bio if possible,
2238 * otherwise resolve the element data into a hammer_buffer
2241 * The buffer on-disk should be zerod past any real
2242 * truncation point, but may not be for any synthesized
2243 * truncation point from above.
2245 disk_offset = cursor.leaf->data_offset + roff;
2246 if (boff == 0 && n == bp->b_bufsize &&
2247 hammer_cursor_ondisk(&cursor) &&
2248 (disk_offset & HAMMER_BUFMASK) == 0) {
2249 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2250 HAMMER_ZONE_LARGE_DATA);
2251 nbio->bio_offset = disk_offset;
2252 error = hammer_io_direct_read(trans.hmp, nbio,
2256 error = hammer_ip_resolve_data(&cursor);
2258 bcopy((char *)cursor.data + roff,
2259 (char *)bp->b_data + boff, n);
2266 * Iterate until we have filled the request.
2269 if (boff == bp->b_bufsize)
2271 error = hammer_ip_next(&cursor);
2275 * There may have been a gap after the last record
2277 if (error == ENOENT)
2279 if (error == 0 && boff != bp->b_bufsize) {
2280 KKASSERT(boff < bp->b_bufsize);
2281 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
2282 /* boff = bp->b_bufsize; */
2285 bp->b_error = error;
2287 bp->b_flags |= B_ERROR;
2292 hammer_cache_node(&ip->cache[1], cursor.node);
2293 hammer_done_cursor(&cursor);
2294 hammer_done_transaction(&trans);
2299 * BMAP operation - used to support cluster_read() only.
2301 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
2303 * This routine may return EOPNOTSUPP if the opration is not supported for
2304 * the specified offset. The contents of the pointer arguments do not
2305 * need to be initialized in that case.
2307 * If a disk address is available and properly aligned return 0 with
2308 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
2309 * to the run-length relative to that offset. Callers may assume that
2310 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
2311 * large, so return EOPNOTSUPP if it is not sufficiently large.
2315 hammer_vop_bmap(struct vop_bmap_args *ap)
2317 struct hammer_transaction trans;
2318 struct hammer_inode *ip;
2319 struct hammer_cursor cursor;
2320 hammer_base_elm_t base;
2324 int64_t base_offset;
2325 int64_t base_disk_offset;
2326 int64_t last_offset;
2327 hammer_off_t last_disk_offset;
2328 hammer_off_t disk_offset;
2333 ++hammer_stats_file_iopsr;
2334 ip = ap->a_vp->v_data;
2337 * We can only BMAP regular files. We can't BMAP database files,
2340 if (ip->ino_data.obj_type != HAMMER_OBJTYPE_REGFILE)
2344 * bmap is typically called with runp/runb both NULL when used
2345 * for writing. We do not support BMAP for writing atm.
2347 if (ap->a_cmd != BUF_CMD_READ)
2351 * Scan the B-Tree to acquire blockmap addresses, then translate
2354 hammer_simple_transaction(&trans, ip->hmp);
2356 kprintf("bmap_beg %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2358 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2361 * Key range (begin and end inclusive) to scan. Note that the key's
2362 * stored in the actual records represent BASE+LEN, not BASE. The
2363 * first record containing bio_offset will have a key > bio_offset.
2365 cursor.key_beg.localization = ip->obj_localization +
2366 HAMMER_LOCALIZE_MISC;
2367 cursor.key_beg.obj_id = ip->obj_id;
2368 cursor.key_beg.create_tid = 0;
2369 cursor.key_beg.delete_tid = 0;
2370 cursor.key_beg.obj_type = 0;
2372 cursor.key_beg.key = ap->a_loffset - MAXPHYS + 1;
2374 cursor.key_beg.key = ap->a_loffset + 1;
2375 if (cursor.key_beg.key < 0)
2376 cursor.key_beg.key = 0;
2377 cursor.asof = ip->obj_asof;
2378 cursor.flags |= HAMMER_CURSOR_ASOF;
2380 cursor.key_end = cursor.key_beg;
2381 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2383 ran_end = ap->a_loffset + MAXPHYS;
2384 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2385 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2386 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2387 if (tmp64 < ran_end)
2388 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2390 cursor.key_end.key = ran_end + MAXPHYS + 1;
2392 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2394 error = hammer_ip_first(&cursor);
2395 base_offset = last_offset = 0;
2396 base_disk_offset = last_disk_offset = 0;
2398 while (error == 0) {
2400 * Get the base file offset of the record. The key for
2401 * data records is (base + bytes) rather then (base).
2403 * NOTE: rec_offset + rec_len may exceed the end-of-file.
2404 * The extra bytes should be zero on-disk and the BMAP op
2405 * should still be ok.
2407 base = &cursor.leaf->base;
2408 rec_offset = base->key - cursor.leaf->data_len;
2409 rec_len = cursor.leaf->data_len;
2412 * Incorporate any cached truncation.
2414 * NOTE: Modifications to rec_len based on synthesized
2415 * truncation points remove the guarantee that any extended
2416 * data on disk is zero (since the truncations may not have
2417 * taken place on-media yet).
2419 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2420 if (hammer_cursor_ondisk(&cursor) ||
2421 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2422 if (ip->trunc_off <= rec_offset)
2424 else if (ip->trunc_off < rec_offset + rec_len)
2425 rec_len = (int)(ip->trunc_off - rec_offset);
2428 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2429 if (hammer_cursor_ondisk(&cursor)) {
2430 if (ip->sync_trunc_off <= rec_offset)
2432 else if (ip->sync_trunc_off < rec_offset + rec_len)
2433 rec_len = (int)(ip->sync_trunc_off - rec_offset);
2438 * Accumulate information. If we have hit a discontiguous
2439 * block reset base_offset unless we are already beyond the
2440 * requested offset. If we are, that's it, we stop.
2444 if (hammer_cursor_ondisk(&cursor)) {
2445 disk_offset = cursor.leaf->data_offset;
2446 if (rec_offset != last_offset ||
2447 disk_offset != last_disk_offset) {
2448 if (rec_offset > ap->a_loffset)
2450 base_offset = rec_offset;
2451 base_disk_offset = disk_offset;
2453 last_offset = rec_offset + rec_len;
2454 last_disk_offset = disk_offset + rec_len;
2456 error = hammer_ip_next(&cursor);
2460 kprintf("BMAP %016llx: %016llx - %016llx\n",
2461 ap->a_loffset, base_offset, last_offset);
2462 kprintf("BMAP %16s: %016llx - %016llx\n",
2463 "", base_disk_offset, last_disk_offset);
2467 hammer_cache_node(&ip->cache[1], cursor.node);
2469 kprintf("bmap_end2 %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2472 hammer_done_cursor(&cursor);
2473 hammer_done_transaction(&trans);
2476 * If we couldn't find any records or the records we did find were
2477 * all behind the requested offset, return failure. A forward
2478 * truncation can leave a hole w/ no on-disk records.
2480 if (last_offset == 0 || last_offset < ap->a_loffset)
2481 return (EOPNOTSUPP);
2484 * Figure out the block size at the requested offset and adjust
2485 * our limits so the cluster_read() does not create inappropriately
2486 * sized buffer cache buffers.
2488 blksize = hammer_blocksize(ap->a_loffset);
2489 if (hammer_blocksize(base_offset) != blksize) {
2490 base_offset = hammer_blockdemarc(base_offset, ap->a_loffset);
2492 if (last_offset != ap->a_loffset &&
2493 hammer_blocksize(last_offset - 1) != blksize) {
2494 last_offset = hammer_blockdemarc(ap->a_loffset,
2499 * Returning EOPNOTSUPP simply prevents the direct-IO optimization
2502 disk_offset = base_disk_offset + (ap->a_loffset - base_offset);
2504 if ((disk_offset & HAMMER_OFF_ZONE_MASK) != HAMMER_ZONE_LARGE_DATA) {
2506 * Only large-data zones can be direct-IOd
2509 } else if ((disk_offset & HAMMER_BUFMASK) ||
2510 (last_offset - ap->a_loffset) < blksize) {
2512 * doffsetp is not aligned or the forward run size does
2513 * not cover a whole buffer, disallow the direct I/O.
2520 *ap->a_doffsetp = disk_offset;
2522 *ap->a_runb = ap->a_loffset - base_offset;
2523 KKASSERT(*ap->a_runb >= 0);
2526 *ap->a_runp = last_offset - ap->a_loffset;
2527 KKASSERT(*ap->a_runp >= 0);
2535 * Write to a regular file. Because this is a strategy call the OS is
2536 * trying to actually get data onto the media.
2540 hammer_vop_strategy_write(struct vop_strategy_args *ap)
2542 hammer_record_t record;
2553 ip = ap->a_vp->v_data;
2556 blksize = hammer_blocksize(bio->bio_offset);
2557 KKASSERT(bp->b_bufsize == blksize);
2559 if (ip->flags & HAMMER_INODE_RO) {
2560 bp->b_error = EROFS;
2561 bp->b_flags |= B_ERROR;
2567 * Interlock with inode destruction (no in-kernel or directory
2568 * topology visibility). If we queue new IO while trying to
2569 * destroy the inode we can deadlock the vtrunc call in
2570 * hammer_inode_unloadable_check().
2572 * Besides, there's no point flushing a bp associated with an
2573 * inode that is being destroyed on-media and has no kernel
2576 if ((ip->flags | ip->sync_flags) &
2577 (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) {
2584 * Reserve space and issue a direct-write from the front-end.
2585 * NOTE: The direct_io code will hammer_bread/bcopy smaller
2588 * An in-memory record will be installed to reference the storage
2589 * until the flusher can get to it.
2591 * Since we own the high level bio the front-end will not try to
2592 * do a direct-read until the write completes.
2594 * NOTE: The only time we do not reserve a full-sized buffers
2595 * worth of data is if the file is small. We do not try to
2596 * allocate a fragment (from the small-data zone) at the end of
2597 * an otherwise large file as this can lead to wildly separated
2600 KKASSERT((bio->bio_offset & HAMMER_BUFMASK) == 0);
2601 KKASSERT(bio->bio_offset < ip->ino_data.size);
2602 if (bio->bio_offset || ip->ino_data.size > HAMMER_BUFSIZE / 2)
2603 bytes = bp->b_bufsize;
2605 bytes = ((int)ip->ino_data.size + 15) & ~15;
2607 record = hammer_ip_add_bulk(ip, bio->bio_offset, bp->b_data,
2610 hammer_io_direct_write(hmp, record, bio);
2611 if (ip->rsv_recs > 1 && hmp->rsv_recs > hammer_limit_recs)
2612 hammer_flush_inode(ip, 0);
2614 bp->b_bio2.bio_offset = NOOFFSET;
2615 bp->b_error = error;
2616 bp->b_flags |= B_ERROR;
2623 * dounlink - disconnect a directory entry
2625 * XXX whiteout support not really in yet
2628 hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
2629 struct vnode *dvp, struct ucred *cred,
2630 int flags, int isdir)
2632 struct namecache *ncp;
2635 struct hammer_cursor cursor;
2640 * Calculate the namekey and setup the key range for the scan. This
2641 * works kinda like a chained hash table where the lower 32 bits
2642 * of the namekey synthesize the chain.
2644 * The key range is inclusive of both key_beg and key_end.
2649 if (dip->flags & HAMMER_INODE_RO)
2652 namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
2654 hammer_init_cursor(trans, &cursor, &dip->cache[1], dip);
2655 cursor.key_beg.localization = dip->obj_localization +
2656 HAMMER_LOCALIZE_MISC;
2657 cursor.key_beg.obj_id = dip->obj_id;
2658 cursor.key_beg.key = namekey;
2659 cursor.key_beg.create_tid = 0;
2660 cursor.key_beg.delete_tid = 0;
2661 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2662 cursor.key_beg.obj_type = 0;
2664 cursor.key_end = cursor.key_beg;
2665 cursor.key_end.key |= 0xFFFFFFFFULL;
2666 cursor.asof = dip->obj_asof;
2667 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
2670 * Scan all matching records (the chain), locate the one matching
2671 * the requested path component. info->last_error contains the
2672 * error code on search termination and could be 0, ENOENT, or
2675 * The hammer_ip_*() functions merge in-memory records with on-disk
2676 * records for the purposes of the search.
2678 error = hammer_ip_first(&cursor);
2680 while (error == 0) {
2681 error = hammer_ip_resolve_data(&cursor);
2684 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
2686 if (ncp->nc_nlen == nlen &&
2687 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
2690 error = hammer_ip_next(&cursor);
2694 * If all is ok we have to get the inode so we can adjust nlinks.
2695 * To avoid a deadlock with the flusher we must release the inode
2696 * lock on the directory when acquiring the inode for the entry.
2698 * If the target is a directory, it must be empty.
2701 hammer_unlock(&cursor.ip->lock);
2702 ip = hammer_get_inode(trans, dip, cursor.data->entry.obj_id,
2704 cursor.data->entry.localization,
2706 hammer_lock_sh(&cursor.ip->lock);
2707 if (error == ENOENT) {
2708 kprintf("obj_id %016llx\n", cursor.data->entry.obj_id);
2709 Debugger("ENOENT unlinking object that should exist");
2713 * If isdir >= 0 we validate that the entry is or is not a
2714 * directory. If isdir < 0 we don't care.
2716 if (error == 0 && isdir >= 0) {
2718 ip->ino_data.obj_type != HAMMER_OBJTYPE_DIRECTORY) {
2720 } else if (isdir == 0 &&
2721 ip->ino_data.obj_type == HAMMER_OBJTYPE_DIRECTORY) {
2727 * If we are trying to remove a directory the directory must
2730 * WARNING: hammer_ip_check_directory_empty() may have to
2731 * terminate the cursor to avoid a deadlock. It is ok to
2732 * call hammer_done_cursor() twice.
2734 if (error == 0 && ip->ino_data.obj_type ==
2735 HAMMER_OBJTYPE_DIRECTORY) {
2736 error = hammer_ip_check_directory_empty(trans, ip);
2740 * Delete the directory entry.
2742 * WARNING: hammer_ip_del_directory() may have to terminate
2743 * the cursor to avoid a deadlock. It is ok to call
2744 * hammer_done_cursor() twice.
2747 error = hammer_ip_del_directory(trans, &cursor,
2750 hammer_done_cursor(&cursor);
2752 cache_setunresolved(nch);
2753 cache_setvp(nch, NULL);
2756 cache_inval_vp(ip->vp, CINV_DESTROY);
2759 hammer_rel_inode(ip, 0);
2761 hammer_done_cursor(&cursor);
2763 if (error == EDEADLK)
2769 /************************************************************************
2770 * FIFO AND SPECFS OPS *
2771 ************************************************************************
2776 hammer_vop_fifoclose (struct vop_close_args *ap)
2778 /* XXX update itimes */
2779 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
2783 hammer_vop_fiforead (struct vop_read_args *ap)
2787 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2788 /* XXX update access time */
2793 hammer_vop_fifowrite (struct vop_write_args *ap)
2797 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2798 /* XXX update access time */
2803 hammer_vop_specclose (struct vop_close_args *ap)
2805 /* XXX update itimes */
2806 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2810 hammer_vop_specread (struct vop_read_args *ap)
2812 /* XXX update access time */
2813 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2817 hammer_vop_specwrite (struct vop_write_args *ap)
2819 /* XXX update last change time */
2820 return (VOCALL(&spec_vnode_vops, &ap->a_head));