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 1.102 2008/10/16 17:24:16 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>
48 #include <vm/vm_extern.h>
49 #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_setattr(struct vop_setattr_args *);
77 static int hammer_vop_strategy(struct vop_strategy_args *);
78 static int hammer_vop_bmap(struct vop_bmap_args *ap);
79 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
80 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
81 static int hammer_vop_ioctl(struct vop_ioctl_args *);
82 static int hammer_vop_mountctl(struct vop_mountctl_args *);
83 static int hammer_vop_kqfilter (struct vop_kqfilter_args *);
85 static int hammer_vop_fifoclose (struct vop_close_args *);
86 static int hammer_vop_fiforead (struct vop_read_args *);
87 static int hammer_vop_fifowrite (struct vop_write_args *);
88 static int hammer_vop_fifokqfilter (struct vop_kqfilter_args *);
90 static int hammer_vop_specclose (struct vop_close_args *);
91 static int hammer_vop_specread (struct vop_read_args *);
92 static int hammer_vop_specwrite (struct vop_write_args *);
94 struct vop_ops hammer_vnode_vops = {
95 .vop_default = vop_defaultop,
96 .vop_fsync = hammer_vop_fsync,
97 .vop_getpages = vop_stdgetpages,
98 .vop_putpages = vop_stdputpages,
99 .vop_read = hammer_vop_read,
100 .vop_write = hammer_vop_write,
101 .vop_access = hammer_vop_access,
102 .vop_advlock = hammer_vop_advlock,
103 .vop_close = hammer_vop_close,
104 .vop_ncreate = hammer_vop_ncreate,
105 .vop_getattr = hammer_vop_getattr,
106 .vop_inactive = hammer_vop_inactive,
107 .vop_reclaim = hammer_vop_reclaim,
108 .vop_nresolve = hammer_vop_nresolve,
109 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
110 .vop_nlink = hammer_vop_nlink,
111 .vop_nmkdir = hammer_vop_nmkdir,
112 .vop_nmknod = hammer_vop_nmknod,
113 .vop_open = hammer_vop_open,
114 .vop_pathconf = vop_stdpathconf,
115 .vop_print = hammer_vop_print,
116 .vop_readdir = hammer_vop_readdir,
117 .vop_readlink = hammer_vop_readlink,
118 .vop_nremove = hammer_vop_nremove,
119 .vop_nrename = hammer_vop_nrename,
120 .vop_nrmdir = hammer_vop_nrmdir,
121 .vop_setattr = hammer_vop_setattr,
122 .vop_bmap = hammer_vop_bmap,
123 .vop_strategy = hammer_vop_strategy,
124 .vop_nsymlink = hammer_vop_nsymlink,
125 .vop_nwhiteout = hammer_vop_nwhiteout,
126 .vop_ioctl = hammer_vop_ioctl,
127 .vop_mountctl = hammer_vop_mountctl,
128 .vop_kqfilter = hammer_vop_kqfilter
131 struct vop_ops hammer_spec_vops = {
132 .vop_default = spec_vnoperate,
133 .vop_fsync = hammer_vop_fsync,
134 .vop_read = hammer_vop_specread,
135 .vop_write = hammer_vop_specwrite,
136 .vop_access = hammer_vop_access,
137 .vop_close = hammer_vop_specclose,
138 .vop_getattr = hammer_vop_getattr,
139 .vop_inactive = hammer_vop_inactive,
140 .vop_reclaim = hammer_vop_reclaim,
141 .vop_setattr = hammer_vop_setattr
144 struct vop_ops hammer_fifo_vops = {
145 .vop_default = fifo_vnoperate,
146 .vop_fsync = hammer_vop_fsync,
147 .vop_read = hammer_vop_fiforead,
148 .vop_write = hammer_vop_fifowrite,
149 .vop_access = hammer_vop_access,
150 .vop_close = hammer_vop_fifoclose,
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_selinfo.si_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
194 hammer_vop_fsync(struct vop_fsync_args *ap)
196 hammer_inode_t ip = VTOI(ap->a_vp);
198 ++hammer_count_fsyncs;
199 vfsync(ap->a_vp, ap->a_waitfor, 1, NULL, NULL);
200 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
201 if (ap->a_waitfor == MNT_WAIT) {
203 hammer_wait_inode(ip);
204 vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY);
210 * hammer_vop_read { vp, uio, ioflag, cred }
214 hammer_vop_read(struct vop_read_args *ap)
216 struct hammer_transaction trans;
227 if (ap->a_vp->v_type != VREG)
234 * Allow the UIO's size to override the sequential heuristic.
236 blksize = hammer_blocksize(uio->uio_offset);
237 seqcount = (uio->uio_resid + (blksize - 1)) / blksize;
238 ioseqcount = ap->a_ioflag >> 16;
239 if (seqcount < ioseqcount)
240 seqcount = ioseqcount;
242 hammer_start_transaction(&trans, ip->hmp);
245 * Access the data typically in HAMMER_BUFSIZE blocks via the
246 * buffer cache, but HAMMER may use a variable block size based
249 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_data.size) {
253 blksize = hammer_blocksize(uio->uio_offset);
254 offset = (int)uio->uio_offset & (blksize - 1);
255 base_offset = uio->uio_offset - offset;
257 if (hammer_cluster_enable) {
259 * Use file_limit to prevent cluster_read() from
260 * creating buffers of the wrong block size past
263 file_limit = ip->ino_data.size;
264 if (base_offset < HAMMER_XDEMARC &&
265 file_limit > HAMMER_XDEMARC) {
266 file_limit = HAMMER_XDEMARC;
268 error = cluster_read(ap->a_vp,
269 file_limit, base_offset,
273 error = bread(ap->a_vp, base_offset, blksize, &bp);
276 kprintf("error %d\n", error);
281 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
282 n = blksize - offset;
283 if (n > uio->uio_resid)
285 if (n > ip->ino_data.size - uio->uio_offset)
286 n = (int)(ip->ino_data.size - uio->uio_offset);
287 error = uiomove((char *)bp->b_data + offset, n, uio);
289 /* data has a lower priority then meta-data */
290 bp->b_flags |= B_AGE;
294 hammer_stats_file_read += n;
296 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
297 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
298 ip->ino_data.atime = trans.time;
299 hammer_modify_inode(ip, HAMMER_INODE_ATIME);
301 hammer_done_transaction(&trans);
306 * hammer_vop_write { vp, uio, ioflag, cred }
310 hammer_vop_write(struct vop_write_args *ap)
312 struct hammer_transaction trans;
313 struct hammer_inode *ip;
326 if (ap->a_vp->v_type != VREG)
332 seqcount = ap->a_ioflag >> 16;
334 if (ip->flags & HAMMER_INODE_RO)
338 * Create a transaction to cover the operations we perform.
340 hammer_start_transaction(&trans, hmp);
346 if (ap->a_ioflag & IO_APPEND)
347 uio->uio_offset = ip->ino_data.size;
350 * Check for illegal write offsets. Valid range is 0...2^63-1.
352 * NOTE: the base_off assignment is required to work around what
353 * I consider to be a GCC-4 optimization bug.
355 if (uio->uio_offset < 0) {
356 hammer_done_transaction(&trans);
359 base_offset = uio->uio_offset + uio->uio_resid; /* work around gcc-4 */
360 if (uio->uio_resid > 0 && base_offset <= 0) {
361 hammer_done_transaction(&trans);
366 * Access the data typically in HAMMER_BUFSIZE blocks via the
367 * buffer cache, but HAMMER may use a variable block size based
370 while (uio->uio_resid > 0) {
375 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE)) != 0)
378 blksize = hammer_blocksize(uio->uio_offset);
381 * Do not allow HAMMER to blow out the buffer cache. Very
382 * large UIOs can lockout other processes due to bwillwrite()
385 * The hammer inode is not locked during these operations.
386 * The vnode is locked which can interfere with the pageout
387 * daemon for non-UIO_NOCOPY writes but should not interfere
388 * with the buffer cache. Even so, we cannot afford to
389 * allow the pageout daemon to build up too many dirty buffer
392 /*if (((int)uio->uio_offset & (blksize - 1)) == 0)*/
396 * Do not allow HAMMER to blow out system memory by
397 * accumulating too many records. Records are so well
398 * decoupled from the buffer cache that it is possible
399 * for userland to push data out to the media via
400 * direct-write, but build up the records queued to the
401 * backend faster then the backend can flush them out.
402 * HAMMER has hit its write limit but the frontend has
403 * no pushback to slow it down.
405 if (hmp->rsv_recs > hammer_limit_recs / 2) {
407 * Get the inode on the flush list
409 if (ip->rsv_recs >= 64)
410 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
411 else if (ip->rsv_recs >= 16)
412 hammer_flush_inode(ip, 0);
415 * Keep the flusher going if the system keeps
418 delta = hmp->count_newrecords -
419 hmp->last_newrecords;
420 if (delta < 0 || delta > hammer_limit_recs / 2) {
421 hmp->last_newrecords = hmp->count_newrecords;
422 hammer_sync_hmp(hmp, MNT_NOWAIT);
426 * If we have gotten behind start slowing
429 delta = (hmp->rsv_recs - hammer_limit_recs) *
430 hz / hammer_limit_recs;
432 tsleep(&trans, 0, "hmrslo", delta);
436 * Calculate the blocksize at the current offset and figure
437 * out how much we can actually write.
439 blkmask = blksize - 1;
440 offset = (int)uio->uio_offset & blkmask;
441 base_offset = uio->uio_offset & ~(int64_t)blkmask;
442 n = blksize - offset;
443 if (n > uio->uio_resid)
445 if (uio->uio_offset + n > ip->ino_data.size) {
446 vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
448 kflags |= NOTE_EXTEND;
451 if (uio->uio_segflg == UIO_NOCOPY) {
453 * Issuing a write with the same data backing the
454 * buffer. Instantiate the buffer to collect the
455 * backing vm pages, then read-in any missing bits.
457 * This case is used by vop_stdputpages().
459 bp = getblk(ap->a_vp, base_offset,
460 blksize, GETBLK_BHEAVY, 0);
461 if ((bp->b_flags & B_CACHE) == 0) {
463 error = bread(ap->a_vp, base_offset,
466 } else if (offset == 0 && uio->uio_resid >= blksize) {
468 * Even though we are entirely overwriting the buffer
469 * we may still have to zero it out to avoid a
470 * mmap/write visibility issue.
472 bp = getblk(ap->a_vp, base_offset, blksize, GETBLK_BHEAVY, 0);
473 if ((bp->b_flags & B_CACHE) == 0)
475 } else if (base_offset >= ip->ino_data.size) {
477 * If the base offset of the buffer is beyond the
478 * file EOF, we don't have to issue a read.
480 bp = getblk(ap->a_vp, base_offset,
481 blksize, GETBLK_BHEAVY, 0);
485 * Partial overwrite, read in any missing bits then
486 * replace the portion being written.
488 error = bread(ap->a_vp, base_offset, blksize, &bp);
493 error = uiomove((char *)bp->b_data + offset,
498 * If we screwed up we have to undo any VM size changes we
504 vtruncbuf(ap->a_vp, ip->ino_data.size,
505 hammer_blocksize(ip->ino_data.size));
509 kflags |= NOTE_WRITE;
510 hammer_stats_file_write += n;
511 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
512 if (ip->ino_data.size < uio->uio_offset) {
513 ip->ino_data.size = uio->uio_offset;
514 flags = HAMMER_INODE_DDIRTY;
515 vnode_pager_setsize(ap->a_vp, ip->ino_data.size);
519 ip->ino_data.mtime = trans.time;
520 flags |= HAMMER_INODE_MTIME | HAMMER_INODE_BUFS;
521 hammer_modify_inode(ip, flags);
524 * Once we dirty the buffer any cached zone-X offset
525 * becomes invalid. HAMMER NOTE: no-history mode cannot
526 * allow overwriting over the same data sector unless
527 * we provide UNDOs for the old data, which we don't.
529 bp->b_bio2.bio_offset = NOOFFSET;
532 * Final buffer disposition.
534 bp->b_flags |= B_AGE;
535 if (ap->a_ioflag & IO_SYNC) {
537 } else if (ap->a_ioflag & IO_DIRECT) {
543 hammer_done_transaction(&trans);
544 hammer_knote(ap->a_vp, kflags);
549 * hammer_vop_access { vp, mode, cred }
553 hammer_vop_access(struct vop_access_args *ap)
555 struct hammer_inode *ip = VTOI(ap->a_vp);
560 ++hammer_stats_file_iopsr;
561 uid = hammer_to_unix_xid(&ip->ino_data.uid);
562 gid = hammer_to_unix_xid(&ip->ino_data.gid);
564 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
565 ip->ino_data.uflags);
570 * hammer_vop_advlock { vp, id, op, fl, flags }
574 hammer_vop_advlock(struct vop_advlock_args *ap)
576 hammer_inode_t ip = VTOI(ap->a_vp);
578 return (lf_advlock(ap, &ip->advlock, ip->ino_data.size));
582 * hammer_vop_close { vp, fflag }
586 hammer_vop_close(struct vop_close_args *ap)
588 /*hammer_inode_t ip = VTOI(ap->a_vp);*/
589 return (vop_stdclose(ap));
593 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
595 * The operating system has already ensured that the directory entry
596 * does not exist and done all appropriate namespace locking.
600 hammer_vop_ncreate(struct vop_ncreate_args *ap)
602 struct hammer_transaction trans;
603 struct hammer_inode *dip;
604 struct hammer_inode *nip;
605 struct nchandle *nch;
609 dip = VTOI(ap->a_dvp);
611 if (dip->flags & HAMMER_INODE_RO)
613 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
617 * Create a transaction to cover the operations we perform.
619 hammer_start_transaction(&trans, dip->hmp);
620 ++hammer_stats_file_iopsw;
623 * Create a new filesystem object of the requested type. The
624 * returned inode will be referenced and shared-locked to prevent
625 * it from being moved to the flusher.
628 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
631 hkprintf("hammer_create_inode error %d\n", error);
632 hammer_done_transaction(&trans);
638 * Add the new filesystem object to the directory. This will also
639 * bump the inode's link count.
641 error = hammer_ip_add_directory(&trans, dip,
642 nch->ncp->nc_name, nch->ncp->nc_nlen,
645 hkprintf("hammer_ip_add_directory error %d\n", error);
651 hammer_rel_inode(nip, 0);
652 hammer_done_transaction(&trans);
655 error = hammer_get_vnode(nip, ap->a_vpp);
656 hammer_done_transaction(&trans);
657 hammer_rel_inode(nip, 0);
659 cache_setunresolved(ap->a_nch);
660 cache_setvp(ap->a_nch, *ap->a_vpp);
662 hammer_knote(ap->a_dvp, NOTE_WRITE);
668 * hammer_vop_getattr { vp, vap }
670 * Retrieve an inode's attribute information. When accessing inodes
671 * historically we fake the atime field to ensure consistent results.
672 * The atime field is stored in the B-Tree element and allowed to be
673 * updated without cycling the element.
677 hammer_vop_getattr(struct vop_getattr_args *ap)
679 struct hammer_inode *ip = VTOI(ap->a_vp);
680 struct vattr *vap = ap->a_vap;
683 * We want the fsid to be different when accessing a filesystem
684 * with different as-of's so programs like diff don't think
685 * the files are the same.
687 * We also want the fsid to be the same when comparing snapshots,
688 * or when comparing mirrors (which might be backed by different
689 * physical devices). HAMMER fsids are based on the PFS's
692 * XXX there is a chance of collision here. The va_fsid reported
693 * by stat is different from the more involved fsid used in the
696 ++hammer_stats_file_iopsr;
697 vap->va_fsid = ip->pfsm->fsid_udev ^ (u_int32_t)ip->obj_asof ^
698 (u_int32_t)(ip->obj_asof >> 32);
700 vap->va_fileid = ip->ino_leaf.base.obj_id;
701 vap->va_mode = ip->ino_data.mode;
702 vap->va_nlink = ip->ino_data.nlinks;
703 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
704 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
707 vap->va_size = ip->ino_data.size;
710 * Special case for @@PFS softlinks. The actual size of the
711 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
713 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_SOFTLINK &&
714 ip->ino_data.size == 10 &&
715 ip->obj_asof == HAMMER_MAX_TID &&
716 ip->obj_localization == 0 &&
717 strncmp(ip->ino_data.ext.symlink, "@@PFS", 5) == 0) {
722 * We must provide a consistent atime and mtime for snapshots
723 * so people can do a 'tar cf - ... | md5' on them and get
724 * consistent results.
726 if (ip->flags & HAMMER_INODE_RO) {
727 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_atime);
728 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_mtime);
730 hammer_time_to_timespec(ip->ino_data.atime, &vap->va_atime);
731 hammer_time_to_timespec(ip->ino_data.mtime, &vap->va_mtime);
733 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
734 vap->va_flags = ip->ino_data.uflags;
735 vap->va_gen = 1; /* hammer inums are unique for all time */
736 vap->va_blocksize = HAMMER_BUFSIZE;
737 if (ip->ino_data.size >= HAMMER_XDEMARC) {
738 vap->va_bytes = (ip->ino_data.size + HAMMER_XBUFMASK64) &
740 } else if (ip->ino_data.size > HAMMER_BUFSIZE / 2) {
741 vap->va_bytes = (ip->ino_data.size + HAMMER_BUFMASK64) &
744 vap->va_bytes = (ip->ino_data.size + 15) & ~15;
747 vap->va_type = hammer_get_vnode_type(ip->ino_data.obj_type);
748 vap->va_filerev = 0; /* XXX */
749 /* mtime uniquely identifies any adjustments made to the file XXX */
750 vap->va_fsmid = ip->ino_data.mtime;
751 vap->va_uid_uuid = ip->ino_data.uid;
752 vap->va_gid_uuid = ip->ino_data.gid;
753 vap->va_fsid_uuid = ip->hmp->fsid;
754 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
757 switch (ip->ino_data.obj_type) {
758 case HAMMER_OBJTYPE_CDEV:
759 case HAMMER_OBJTYPE_BDEV:
760 vap->va_rmajor = ip->ino_data.rmajor;
761 vap->va_rminor = ip->ino_data.rminor;
770 * hammer_vop_nresolve { nch, dvp, cred }
772 * Locate the requested directory entry.
776 hammer_vop_nresolve(struct vop_nresolve_args *ap)
778 struct hammer_transaction trans;
779 struct namecache *ncp;
783 struct hammer_cursor cursor;
792 u_int32_t localization;
793 u_int32_t max_iterations;
796 * Misc initialization, plus handle as-of name extensions. Look for
797 * the '@@' extension. Note that as-of files and directories cannot
800 dip = VTOI(ap->a_dvp);
801 ncp = ap->a_nch->ncp;
802 asof = dip->obj_asof;
803 localization = dip->obj_localization; /* for code consistency */
805 flags = dip->flags & HAMMER_INODE_RO;
808 hammer_simple_transaction(&trans, dip->hmp);
809 ++hammer_stats_file_iopsr;
811 for (i = 0; i < nlen; ++i) {
812 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
813 error = hammer_str_to_tid(ncp->nc_name + i + 2,
814 &ispfs, &asof, &localization);
819 if (asof != HAMMER_MAX_TID)
820 flags |= HAMMER_INODE_RO;
827 * If this is a PFS softlink we dive into the PFS
829 if (ispfs && nlen == 0) {
830 ip = hammer_get_inode(&trans, dip, HAMMER_OBJID_ROOT,
834 error = hammer_get_vnode(ip, &vp);
835 hammer_rel_inode(ip, 0);
841 cache_setvp(ap->a_nch, vp);
848 * If there is no path component the time extension is relative to
852 ip = hammer_get_inode(&trans, dip, dip->obj_id,
853 asof, dip->obj_localization,
856 error = hammer_get_vnode(ip, &vp);
857 hammer_rel_inode(ip, 0);
863 cache_setvp(ap->a_nch, vp);
870 * Calculate the namekey and setup the key range for the scan. This
871 * works kinda like a chained hash table where the lower 32 bits
872 * of the namekey synthesize the chain.
874 * The key range is inclusive of both key_beg and key_end.
876 namekey = hammer_directory_namekey(dip, ncp->nc_name, nlen,
879 error = hammer_init_cursor(&trans, &cursor, &dip->cache[1], dip);
880 cursor.key_beg.localization = dip->obj_localization +
881 HAMMER_LOCALIZE_MISC;
882 cursor.key_beg.obj_id = dip->obj_id;
883 cursor.key_beg.key = namekey;
884 cursor.key_beg.create_tid = 0;
885 cursor.key_beg.delete_tid = 0;
886 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
887 cursor.key_beg.obj_type = 0;
889 cursor.key_end = cursor.key_beg;
890 cursor.key_end.key += max_iterations;
892 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
895 * Scan all matching records (the chain), locate the one matching
896 * the requested path component.
898 * The hammer_ip_*() functions merge in-memory records with on-disk
899 * records for the purposes of the search.
902 localization = HAMMER_DEF_LOCALIZATION;
905 error = hammer_ip_first(&cursor);
907 error = hammer_ip_resolve_data(&cursor);
910 if (nlen == cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF &&
911 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
912 obj_id = cursor.data->entry.obj_id;
913 localization = cursor.data->entry.localization;
916 error = hammer_ip_next(&cursor);
919 hammer_done_cursor(&cursor);
921 ip = hammer_get_inode(&trans, dip, obj_id,
925 error = hammer_get_vnode(ip, &vp);
926 hammer_rel_inode(ip, 0);
932 cache_setvp(ap->a_nch, vp);
935 } else if (error == ENOENT) {
936 cache_setvp(ap->a_nch, NULL);
939 hammer_done_transaction(&trans);
944 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
946 * Locate the parent directory of a directory vnode.
948 * dvp is referenced but not locked. *vpp must be returned referenced and
949 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
950 * at the root, instead it could indicate that the directory we were in was
953 * NOTE: as-of sequences are not linked into the directory structure. If
954 * we are at the root with a different asof then the mount point, reload
955 * the same directory with the mount point's asof. I'm not sure what this
956 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
957 * get confused, but it hasn't been tested.
961 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
963 struct hammer_transaction trans;
964 struct hammer_inode *dip;
965 struct hammer_inode *ip;
966 int64_t parent_obj_id;
967 u_int32_t parent_obj_localization;
971 dip = VTOI(ap->a_dvp);
972 asof = dip->obj_asof;
975 * Whos are parent? This could be the root of a pseudo-filesystem
976 * whos parent is in another localization domain.
978 parent_obj_id = dip->ino_data.parent_obj_id;
979 if (dip->obj_id == HAMMER_OBJID_ROOT)
980 parent_obj_localization = dip->ino_data.ext.obj.parent_obj_localization;
982 parent_obj_localization = dip->obj_localization;
984 if (parent_obj_id == 0) {
985 if (dip->obj_id == HAMMER_OBJID_ROOT &&
986 asof != dip->hmp->asof) {
987 parent_obj_id = dip->obj_id;
988 asof = dip->hmp->asof;
989 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
990 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
998 hammer_simple_transaction(&trans, dip->hmp);
999 ++hammer_stats_file_iopsr;
1001 ip = hammer_get_inode(&trans, dip, parent_obj_id,
1002 asof, parent_obj_localization,
1003 dip->flags, &error);
1005 error = hammer_get_vnode(ip, ap->a_vpp);
1006 hammer_rel_inode(ip, 0);
1010 hammer_done_transaction(&trans);
1015 * hammer_vop_nlink { nch, dvp, vp, cred }
1019 hammer_vop_nlink(struct vop_nlink_args *ap)
1021 struct hammer_transaction trans;
1022 struct hammer_inode *dip;
1023 struct hammer_inode *ip;
1024 struct nchandle *nch;
1027 if (ap->a_dvp->v_mount != ap->a_vp->v_mount)
1031 dip = VTOI(ap->a_dvp);
1032 ip = VTOI(ap->a_vp);
1034 if (dip->obj_localization != ip->obj_localization)
1037 if (dip->flags & HAMMER_INODE_RO)
1039 if (ip->flags & HAMMER_INODE_RO)
1041 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1045 * Create a transaction to cover the operations we perform.
1047 hammer_start_transaction(&trans, dip->hmp);
1048 ++hammer_stats_file_iopsw;
1051 * Add the filesystem object to the directory. Note that neither
1052 * dip nor ip are referenced or locked, but their vnodes are
1053 * referenced. This function will bump the inode's link count.
1055 error = hammer_ip_add_directory(&trans, dip,
1056 nch->ncp->nc_name, nch->ncp->nc_nlen,
1063 cache_setunresolved(nch);
1064 cache_setvp(nch, ap->a_vp);
1066 hammer_done_transaction(&trans);
1067 hammer_knote(ap->a_vp, NOTE_LINK);
1068 hammer_knote(ap->a_dvp, NOTE_WRITE);
1073 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1075 * The operating system has already ensured that the directory entry
1076 * does not exist and done all appropriate namespace locking.
1080 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
1082 struct hammer_transaction trans;
1083 struct hammer_inode *dip;
1084 struct hammer_inode *nip;
1085 struct nchandle *nch;
1089 dip = VTOI(ap->a_dvp);
1091 if (dip->flags & HAMMER_INODE_RO)
1093 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1097 * Create a transaction to cover the operations we perform.
1099 hammer_start_transaction(&trans, dip->hmp);
1100 ++hammer_stats_file_iopsw;
1103 * Create a new filesystem object of the requested type. The
1104 * returned inode will be referenced but not locked.
1106 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1109 hkprintf("hammer_mkdir error %d\n", error);
1110 hammer_done_transaction(&trans);
1115 * Add the new filesystem object to the directory. This will also
1116 * bump the inode's link count.
1118 error = hammer_ip_add_directory(&trans, dip,
1119 nch->ncp->nc_name, nch->ncp->nc_nlen,
1122 hkprintf("hammer_mkdir (add) error %d\n", error);
1128 hammer_rel_inode(nip, 0);
1131 error = hammer_get_vnode(nip, ap->a_vpp);
1132 hammer_rel_inode(nip, 0);
1134 cache_setunresolved(ap->a_nch);
1135 cache_setvp(ap->a_nch, *ap->a_vpp);
1138 hammer_done_transaction(&trans);
1140 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
1145 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1147 * The operating system has already ensured that the directory entry
1148 * does not exist and done all appropriate namespace locking.
1152 hammer_vop_nmknod(struct vop_nmknod_args *ap)
1154 struct hammer_transaction trans;
1155 struct hammer_inode *dip;
1156 struct hammer_inode *nip;
1157 struct nchandle *nch;
1161 dip = VTOI(ap->a_dvp);
1163 if (dip->flags & HAMMER_INODE_RO)
1165 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1169 * Create a transaction to cover the operations we perform.
1171 hammer_start_transaction(&trans, dip->hmp);
1172 ++hammer_stats_file_iopsw;
1175 * Create a new filesystem object of the requested type. The
1176 * returned inode will be referenced but not locked.
1178 * If mknod specifies a directory a pseudo-fs is created.
1180 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1183 hammer_done_transaction(&trans);
1189 * Add the new filesystem object to the directory. This will also
1190 * bump the inode's link count.
1192 error = hammer_ip_add_directory(&trans, dip,
1193 nch->ncp->nc_name, nch->ncp->nc_nlen,
1200 hammer_rel_inode(nip, 0);
1203 error = hammer_get_vnode(nip, ap->a_vpp);
1204 hammer_rel_inode(nip, 0);
1206 cache_setunresolved(ap->a_nch);
1207 cache_setvp(ap->a_nch, *ap->a_vpp);
1210 hammer_done_transaction(&trans);
1212 hammer_knote(ap->a_dvp, NOTE_WRITE);
1217 * hammer_vop_open { vp, mode, cred, fp }
1221 hammer_vop_open(struct vop_open_args *ap)
1225 ++hammer_stats_file_iopsr;
1226 ip = VTOI(ap->a_vp);
1228 if ((ap->a_mode & FWRITE) && (ip->flags & HAMMER_INODE_RO))
1230 return(vop_stdopen(ap));
1234 * hammer_vop_print { vp }
1238 hammer_vop_print(struct vop_print_args *ap)
1244 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
1248 hammer_vop_readdir(struct vop_readdir_args *ap)
1250 struct hammer_transaction trans;
1251 struct hammer_cursor cursor;
1252 struct hammer_inode *ip;
1254 hammer_base_elm_t base;
1263 ++hammer_stats_file_iopsr;
1264 ip = VTOI(ap->a_vp);
1266 saveoff = uio->uio_offset;
1268 if (ap->a_ncookies) {
1269 ncookies = uio->uio_resid / 16 + 1;
1270 if (ncookies > 1024)
1272 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1280 hammer_simple_transaction(&trans, ip->hmp);
1283 * Handle artificial entries
1287 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1291 cookies[cookie_index] = saveoff;
1294 if (cookie_index == ncookies)
1298 if (ip->ino_data.parent_obj_id) {
1299 r = vop_write_dirent(&error, uio,
1300 ip->ino_data.parent_obj_id,
1303 r = vop_write_dirent(&error, uio,
1304 ip->obj_id, DT_DIR, 2, "..");
1309 cookies[cookie_index] = saveoff;
1312 if (cookie_index == ncookies)
1317 * Key range (begin and end inclusive) to scan. Directory keys
1318 * directly translate to a 64 bit 'seek' position.
1320 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1321 cursor.key_beg.localization = ip->obj_localization +
1322 HAMMER_LOCALIZE_MISC;
1323 cursor.key_beg.obj_id = ip->obj_id;
1324 cursor.key_beg.create_tid = 0;
1325 cursor.key_beg.delete_tid = 0;
1326 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1327 cursor.key_beg.obj_type = 0;
1328 cursor.key_beg.key = saveoff;
1330 cursor.key_end = cursor.key_beg;
1331 cursor.key_end.key = HAMMER_MAX_KEY;
1332 cursor.asof = ip->obj_asof;
1333 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1335 error = hammer_ip_first(&cursor);
1337 while (error == 0) {
1338 error = hammer_ip_resolve_data(&cursor);
1341 base = &cursor.leaf->base;
1342 saveoff = base->key;
1343 KKASSERT(cursor.leaf->data_len > HAMMER_ENTRY_NAME_OFF);
1345 if (base->obj_id != ip->obj_id)
1346 panic("readdir: bad record at %p", cursor.node);
1349 * Convert pseudo-filesystems into softlinks
1351 dtype = hammer_get_dtype(cursor.leaf->base.obj_type);
1352 r = vop_write_dirent(
1353 &error, uio, cursor.data->entry.obj_id,
1355 cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF ,
1356 (void *)cursor.data->entry.name);
1361 cookies[cookie_index] = base->key;
1363 if (cookie_index == ncookies)
1365 error = hammer_ip_next(&cursor);
1367 hammer_done_cursor(&cursor);
1370 hammer_done_transaction(&trans);
1373 *ap->a_eofflag = (error == ENOENT);
1374 uio->uio_offset = saveoff;
1375 if (error && cookie_index == 0) {
1376 if (error == ENOENT)
1379 kfree(cookies, M_TEMP);
1380 *ap->a_ncookies = 0;
1381 *ap->a_cookies = NULL;
1384 if (error == ENOENT)
1387 *ap->a_ncookies = cookie_index;
1388 *ap->a_cookies = cookies;
1395 * hammer_vop_readlink { vp, uio, cred }
1399 hammer_vop_readlink(struct vop_readlink_args *ap)
1401 struct hammer_transaction trans;
1402 struct hammer_cursor cursor;
1403 struct hammer_inode *ip;
1405 u_int32_t localization;
1406 hammer_pseudofs_inmem_t pfsm;
1409 ip = VTOI(ap->a_vp);
1412 * Shortcut if the symlink data was stuffed into ino_data.
1414 * Also expand special "@@PFS%05d" softlinks (expansion only
1415 * occurs for non-historical (current) accesses made from the
1416 * primary filesystem).
1418 if (ip->ino_data.size <= HAMMER_INODE_BASESYMLEN) {
1422 ptr = ip->ino_data.ext.symlink;
1423 bytes = (int)ip->ino_data.size;
1425 ip->obj_asof == HAMMER_MAX_TID &&
1426 ip->obj_localization == 0 &&
1427 strncmp(ptr, "@@PFS", 5) == 0) {
1428 hammer_simple_transaction(&trans, ip->hmp);
1429 bcopy(ptr + 5, buf, 5);
1431 localization = strtoul(buf, NULL, 10) << 16;
1432 pfsm = hammer_load_pseudofs(&trans, localization,
1435 if (pfsm->pfsd.mirror_flags &
1436 HAMMER_PFSD_SLAVE) {
1437 ksnprintf(buf, sizeof(buf),
1439 pfsm->pfsd.sync_end_tid,
1440 localization >> 16);
1442 ksnprintf(buf, sizeof(buf),
1445 localization >> 16);
1448 bytes = strlen(buf);
1451 hammer_rel_pseudofs(trans.hmp, pfsm);
1452 hammer_done_transaction(&trans);
1454 error = uiomove(ptr, bytes, ap->a_uio);
1461 hammer_simple_transaction(&trans, ip->hmp);
1462 ++hammer_stats_file_iopsr;
1463 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1466 * Key range (begin and end inclusive) to scan. Directory keys
1467 * directly translate to a 64 bit 'seek' position.
1469 cursor.key_beg.localization = ip->obj_localization +
1470 HAMMER_LOCALIZE_MISC;
1471 cursor.key_beg.obj_id = ip->obj_id;
1472 cursor.key_beg.create_tid = 0;
1473 cursor.key_beg.delete_tid = 0;
1474 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1475 cursor.key_beg.obj_type = 0;
1476 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1477 cursor.asof = ip->obj_asof;
1478 cursor.flags |= HAMMER_CURSOR_ASOF;
1480 error = hammer_ip_lookup(&cursor);
1482 error = hammer_ip_resolve_data(&cursor);
1484 KKASSERT(cursor.leaf->data_len >=
1485 HAMMER_SYMLINK_NAME_OFF);
1486 error = uiomove(cursor.data->symlink.name,
1487 cursor.leaf->data_len -
1488 HAMMER_SYMLINK_NAME_OFF,
1492 hammer_done_cursor(&cursor);
1493 hammer_done_transaction(&trans);
1498 * hammer_vop_nremove { nch, dvp, cred }
1502 hammer_vop_nremove(struct vop_nremove_args *ap)
1504 struct hammer_transaction trans;
1505 struct hammer_inode *dip;
1508 dip = VTOI(ap->a_dvp);
1510 if (hammer_nohistory(dip) == 0 &&
1511 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1515 hammer_start_transaction(&trans, dip->hmp);
1516 ++hammer_stats_file_iopsw;
1517 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 0);
1518 hammer_done_transaction(&trans);
1520 hammer_knote(ap->a_dvp, NOTE_WRITE);
1525 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1529 hammer_vop_nrename(struct vop_nrename_args *ap)
1531 struct hammer_transaction trans;
1532 struct namecache *fncp;
1533 struct namecache *tncp;
1534 struct hammer_inode *fdip;
1535 struct hammer_inode *tdip;
1536 struct hammer_inode *ip;
1537 struct hammer_cursor cursor;
1539 u_int32_t max_iterations;
1542 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1544 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1547 fdip = VTOI(ap->a_fdvp);
1548 tdip = VTOI(ap->a_tdvp);
1549 fncp = ap->a_fnch->ncp;
1550 tncp = ap->a_tnch->ncp;
1551 ip = VTOI(fncp->nc_vp);
1552 KKASSERT(ip != NULL);
1554 if (fdip->obj_localization != tdip->obj_localization)
1556 if (fdip->obj_localization != ip->obj_localization)
1559 if (fdip->flags & HAMMER_INODE_RO)
1561 if (tdip->flags & HAMMER_INODE_RO)
1563 if (ip->flags & HAMMER_INODE_RO)
1565 if ((error = hammer_checkspace(fdip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1568 hammer_start_transaction(&trans, fdip->hmp);
1569 ++hammer_stats_file_iopsw;
1572 * Remove tncp from the target directory and then link ip as
1573 * tncp. XXX pass trans to dounlink
1575 * Force the inode sync-time to match the transaction so it is
1576 * in-sync with the creation of the target directory entry.
1578 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp,
1580 if (error == 0 || error == ENOENT) {
1581 error = hammer_ip_add_directory(&trans, tdip,
1582 tncp->nc_name, tncp->nc_nlen,
1585 ip->ino_data.parent_obj_id = tdip->obj_id;
1586 hammer_modify_inode(ip, HAMMER_INODE_DDIRTY);
1590 goto failed; /* XXX */
1593 * Locate the record in the originating directory and remove it.
1595 * Calculate the namekey and setup the key range for the scan. This
1596 * works kinda like a chained hash table where the lower 32 bits
1597 * of the namekey synthesize the chain.
1599 * The key range is inclusive of both key_beg and key_end.
1601 namekey = hammer_directory_namekey(fdip, fncp->nc_name, fncp->nc_nlen,
1604 hammer_init_cursor(&trans, &cursor, &fdip->cache[1], fdip);
1605 cursor.key_beg.localization = fdip->obj_localization +
1606 HAMMER_LOCALIZE_MISC;
1607 cursor.key_beg.obj_id = fdip->obj_id;
1608 cursor.key_beg.key = namekey;
1609 cursor.key_beg.create_tid = 0;
1610 cursor.key_beg.delete_tid = 0;
1611 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1612 cursor.key_beg.obj_type = 0;
1614 cursor.key_end = cursor.key_beg;
1615 cursor.key_end.key += max_iterations;
1616 cursor.asof = fdip->obj_asof;
1617 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1620 * Scan all matching records (the chain), locate the one matching
1621 * the requested path component.
1623 * The hammer_ip_*() functions merge in-memory records with on-disk
1624 * records for the purposes of the search.
1626 error = hammer_ip_first(&cursor);
1627 while (error == 0) {
1628 if (hammer_ip_resolve_data(&cursor) != 0)
1630 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
1632 if (fncp->nc_nlen == nlen &&
1633 bcmp(fncp->nc_name, cursor.data->entry.name, nlen) == 0) {
1636 error = hammer_ip_next(&cursor);
1640 * If all is ok we have to get the inode so we can adjust nlinks.
1642 * WARNING: hammer_ip_del_directory() may have to terminate the
1643 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
1647 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1650 * XXX A deadlock here will break rename's atomicy for the purposes
1651 * of crash recovery.
1653 if (error == EDEADLK) {
1654 hammer_done_cursor(&cursor);
1659 * Cleanup and tell the kernel that the rename succeeded.
1661 hammer_done_cursor(&cursor);
1663 cache_rename(ap->a_fnch, ap->a_tnch);
1664 hammer_knote(ap->a_fdvp, NOTE_WRITE);
1665 hammer_knote(ap->a_tdvp, NOTE_WRITE);
1667 hammer_knote(ip->vp, NOTE_RENAME);
1671 hammer_done_transaction(&trans);
1676 * hammer_vop_nrmdir { nch, dvp, cred }
1680 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1682 struct hammer_transaction trans;
1683 struct hammer_inode *dip;
1686 dip = VTOI(ap->a_dvp);
1688 if (hammer_nohistory(dip) == 0 &&
1689 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1693 hammer_start_transaction(&trans, dip->hmp);
1694 ++hammer_stats_file_iopsw;
1695 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 1);
1696 hammer_done_transaction(&trans);
1698 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
1703 * hammer_vop_setattr { vp, vap, cred }
1707 hammer_vop_setattr(struct vop_setattr_args *ap)
1709 struct hammer_transaction trans;
1711 struct hammer_inode *ip;
1717 int64_t aligned_size;
1721 ip = ap->a_vp->v_data;
1725 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1727 if (ip->flags & HAMMER_INODE_RO)
1729 if (hammer_nohistory(ip) == 0 &&
1730 (error = hammer_checkspace(ip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1734 hammer_start_transaction(&trans, ip->hmp);
1735 ++hammer_stats_file_iopsw;
1738 if (vap->va_flags != VNOVAL) {
1739 flags = ip->ino_data.uflags;
1740 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1741 hammer_to_unix_xid(&ip->ino_data.uid),
1744 if (ip->ino_data.uflags != flags) {
1745 ip->ino_data.uflags = flags;
1746 modflags |= HAMMER_INODE_DDIRTY;
1747 kflags |= NOTE_ATTRIB;
1749 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1756 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1760 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
1761 mode_t cur_mode = ip->ino_data.mode;
1762 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1763 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1767 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
1769 &cur_uid, &cur_gid, &cur_mode);
1771 hammer_guid_to_uuid(&uuid_uid, cur_uid);
1772 hammer_guid_to_uuid(&uuid_gid, cur_gid);
1773 if (bcmp(&uuid_uid, &ip->ino_data.uid,
1774 sizeof(uuid_uid)) ||
1775 bcmp(&uuid_gid, &ip->ino_data.gid,
1776 sizeof(uuid_gid)) ||
1777 ip->ino_data.mode != cur_mode
1779 ip->ino_data.uid = uuid_uid;
1780 ip->ino_data.gid = uuid_gid;
1781 ip->ino_data.mode = cur_mode;
1783 modflags |= HAMMER_INODE_DDIRTY;
1784 kflags |= NOTE_ATTRIB;
1787 while (vap->va_size != VNOVAL && ip->ino_data.size != vap->va_size) {
1788 switch(ap->a_vp->v_type) {
1790 if (vap->va_size == ip->ino_data.size)
1793 * XXX break atomicy, we can deadlock the backend
1794 * if we do not release the lock. Probably not a
1797 blksize = hammer_blocksize(vap->va_size);
1798 if (vap->va_size < ip->ino_data.size) {
1799 vtruncbuf(ap->a_vp, vap->va_size, blksize);
1801 kflags |= NOTE_WRITE;
1803 vnode_pager_setsize(ap->a_vp, vap->va_size);
1805 kflags |= NOTE_WRITE | NOTE_EXTEND;
1807 ip->ino_data.size = vap->va_size;
1808 modflags |= HAMMER_INODE_DDIRTY;
1811 * on-media truncation is cached in the inode until
1812 * the inode is synchronized.
1815 hammer_ip_frontend_trunc(ip, vap->va_size);
1816 #ifdef DEBUG_TRUNCATE
1817 if (HammerTruncIp == NULL)
1820 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1821 ip->flags |= HAMMER_INODE_TRUNCATED;
1822 ip->trunc_off = vap->va_size;
1823 #ifdef DEBUG_TRUNCATE
1824 if (ip == HammerTruncIp)
1825 kprintf("truncate1 %016llx\n", ip->trunc_off);
1827 } else if (ip->trunc_off > vap->va_size) {
1828 ip->trunc_off = vap->va_size;
1829 #ifdef DEBUG_TRUNCATE
1830 if (ip == HammerTruncIp)
1831 kprintf("truncate2 %016llx\n", ip->trunc_off);
1834 #ifdef DEBUG_TRUNCATE
1835 if (ip == HammerTruncIp)
1836 kprintf("truncate3 %016llx (ignored)\n", vap->va_size);
1842 * If truncating we have to clean out a portion of
1843 * the last block on-disk. We do this in the
1844 * front-end buffer cache.
1846 aligned_size = (vap->va_size + (blksize - 1)) &
1847 ~(int64_t)(blksize - 1);
1848 if (truncating && vap->va_size < aligned_size) {
1852 aligned_size -= blksize;
1854 offset = (int)vap->va_size & (blksize - 1);
1855 error = bread(ap->a_vp, aligned_size,
1857 hammer_ip_frontend_trunc(ip, aligned_size);
1859 bzero(bp->b_data + offset,
1861 /* must de-cache direct-io offset */
1862 bp->b_bio2.bio_offset = NOOFFSET;
1865 kprintf("ERROR %d\n", error);
1871 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1872 ip->flags |= HAMMER_INODE_TRUNCATED;
1873 ip->trunc_off = vap->va_size;
1874 } else if (ip->trunc_off > vap->va_size) {
1875 ip->trunc_off = vap->va_size;
1877 hammer_ip_frontend_trunc(ip, vap->va_size);
1878 ip->ino_data.size = vap->va_size;
1879 modflags |= HAMMER_INODE_DDIRTY;
1880 kflags |= NOTE_ATTRIB;
1888 if (vap->va_atime.tv_sec != VNOVAL) {
1889 ip->ino_data.atime =
1890 hammer_timespec_to_time(&vap->va_atime);
1891 modflags |= HAMMER_INODE_ATIME;
1892 kflags |= NOTE_ATTRIB;
1894 if (vap->va_mtime.tv_sec != VNOVAL) {
1895 ip->ino_data.mtime =
1896 hammer_timespec_to_time(&vap->va_mtime);
1897 modflags |= HAMMER_INODE_MTIME;
1898 kflags |= NOTE_ATTRIB;
1900 if (vap->va_mode != (mode_t)VNOVAL) {
1901 mode_t cur_mode = ip->ino_data.mode;
1902 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1903 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1905 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
1906 cur_uid, cur_gid, &cur_mode);
1907 if (error == 0 && ip->ino_data.mode != cur_mode) {
1908 ip->ino_data.mode = cur_mode;
1909 modflags |= HAMMER_INODE_DDIRTY;
1910 kflags |= NOTE_ATTRIB;
1915 hammer_modify_inode(ip, modflags);
1916 hammer_done_transaction(&trans);
1917 hammer_knote(ap->a_vp, kflags);
1922 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1926 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
1928 struct hammer_transaction trans;
1929 struct hammer_inode *dip;
1930 struct hammer_inode *nip;
1931 struct nchandle *nch;
1932 hammer_record_t record;
1936 ap->a_vap->va_type = VLNK;
1939 dip = VTOI(ap->a_dvp);
1941 if (dip->flags & HAMMER_INODE_RO)
1943 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1947 * Create a transaction to cover the operations we perform.
1949 hammer_start_transaction(&trans, dip->hmp);
1950 ++hammer_stats_file_iopsw;
1953 * Create a new filesystem object of the requested type. The
1954 * returned inode will be referenced but not locked.
1957 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1960 hammer_done_transaction(&trans);
1966 * Add a record representing the symlink. symlink stores the link
1967 * as pure data, not a string, and is no \0 terminated.
1970 bytes = strlen(ap->a_target);
1972 if (bytes <= HAMMER_INODE_BASESYMLEN) {
1973 bcopy(ap->a_target, nip->ino_data.ext.symlink, bytes);
1975 record = hammer_alloc_mem_record(nip, bytes);
1976 record->type = HAMMER_MEM_RECORD_GENERAL;
1978 record->leaf.base.localization = nip->obj_localization +
1979 HAMMER_LOCALIZE_MISC;
1980 record->leaf.base.key = HAMMER_FIXKEY_SYMLINK;
1981 record->leaf.base.rec_type = HAMMER_RECTYPE_FIX;
1982 record->leaf.data_len = bytes;
1983 KKASSERT(HAMMER_SYMLINK_NAME_OFF == 0);
1984 bcopy(ap->a_target, record->data->symlink.name, bytes);
1985 error = hammer_ip_add_record(&trans, record);
1989 * Set the file size to the length of the link.
1992 nip->ino_data.size = bytes;
1993 hammer_modify_inode(nip, HAMMER_INODE_DDIRTY);
1997 error = hammer_ip_add_directory(&trans, dip, nch->ncp->nc_name,
1998 nch->ncp->nc_nlen, nip);
2004 hammer_rel_inode(nip, 0);
2007 error = hammer_get_vnode(nip, ap->a_vpp);
2008 hammer_rel_inode(nip, 0);
2010 cache_setunresolved(ap->a_nch);
2011 cache_setvp(ap->a_nch, *ap->a_vpp);
2012 hammer_knote(ap->a_dvp, NOTE_WRITE);
2015 hammer_done_transaction(&trans);
2020 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
2024 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
2026 struct hammer_transaction trans;
2027 struct hammer_inode *dip;
2030 dip = VTOI(ap->a_dvp);
2032 if (hammer_nohistory(dip) == 0 &&
2033 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0) {
2037 hammer_start_transaction(&trans, dip->hmp);
2038 ++hammer_stats_file_iopsw;
2039 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
2040 ap->a_cred, ap->a_flags, -1);
2041 hammer_done_transaction(&trans);
2047 * hammer_vop_ioctl { vp, command, data, fflag, cred }
2051 hammer_vop_ioctl(struct vop_ioctl_args *ap)
2053 struct hammer_inode *ip = ap->a_vp->v_data;
2055 ++hammer_stats_file_iopsr;
2056 return(hammer_ioctl(ip, ap->a_command, ap->a_data,
2057 ap->a_fflag, ap->a_cred));
2062 hammer_vop_mountctl(struct vop_mountctl_args *ap)
2067 mp = ap->a_head.a_ops->head.vv_mount;
2070 case MOUNTCTL_SET_EXPORT:
2071 if (ap->a_ctllen != sizeof(struct export_args))
2074 error = hammer_vfs_export(mp, ap->a_op,
2075 (const struct export_args *)ap->a_ctl);
2078 error = journal_mountctl(ap);
2085 * hammer_vop_strategy { vp, bio }
2087 * Strategy call, used for regular file read & write only. Note that the
2088 * bp may represent a cluster.
2090 * To simplify operation and allow better optimizations in the future,
2091 * this code does not make any assumptions with regards to buffer alignment
2096 hammer_vop_strategy(struct vop_strategy_args *ap)
2101 bp = ap->a_bio->bio_buf;
2105 error = hammer_vop_strategy_read(ap);
2108 error = hammer_vop_strategy_write(ap);
2111 bp->b_error = error = EINVAL;
2112 bp->b_flags |= B_ERROR;
2120 * Read from a regular file. Iterate the related records and fill in the
2121 * BIO/BUF. Gaps are zero-filled.
2123 * The support code in hammer_object.c should be used to deal with mixed
2124 * in-memory and on-disk records.
2126 * NOTE: Can be called from the cluster code with an oversized buf.
2132 hammer_vop_strategy_read(struct vop_strategy_args *ap)
2134 struct hammer_transaction trans;
2135 struct hammer_inode *ip;
2136 struct hammer_cursor cursor;
2137 hammer_base_elm_t base;
2138 hammer_off_t disk_offset;
2152 ip = ap->a_vp->v_data;
2155 * The zone-2 disk offset may have been set by the cluster code via
2156 * a BMAP operation, or else should be NOOFFSET.
2158 * Checking the high bits for a match against zone-2 should suffice.
2160 nbio = push_bio(bio);
2161 if ((nbio->bio_offset & HAMMER_OFF_ZONE_MASK) ==
2162 HAMMER_ZONE_LARGE_DATA) {
2163 error = hammer_io_direct_read(ip->hmp, nbio, NULL);
2168 * Well, that sucked. Do it the hard way. If all the stars are
2169 * aligned we may still be able to issue a direct-read.
2171 hammer_simple_transaction(&trans, ip->hmp);
2172 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2175 * Key range (begin and end inclusive) to scan. Note that the key's
2176 * stored in the actual records represent BASE+LEN, not BASE. The
2177 * first record containing bio_offset will have a key > bio_offset.
2179 cursor.key_beg.localization = ip->obj_localization +
2180 HAMMER_LOCALIZE_MISC;
2181 cursor.key_beg.obj_id = ip->obj_id;
2182 cursor.key_beg.create_tid = 0;
2183 cursor.key_beg.delete_tid = 0;
2184 cursor.key_beg.obj_type = 0;
2185 cursor.key_beg.key = bio->bio_offset + 1;
2186 cursor.asof = ip->obj_asof;
2187 cursor.flags |= HAMMER_CURSOR_ASOF;
2189 cursor.key_end = cursor.key_beg;
2190 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2192 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_DBFILE) {
2193 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
2194 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
2195 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2199 ran_end = bio->bio_offset + bp->b_bufsize;
2200 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2201 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2202 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2203 if (tmp64 < ran_end)
2204 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2206 cursor.key_end.key = ran_end + MAXPHYS + 1;
2208 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2210 error = hammer_ip_first(&cursor);
2213 while (error == 0) {
2215 * Get the base file offset of the record. The key for
2216 * data records is (base + bytes) rather then (base).
2218 base = &cursor.leaf->base;
2219 rec_offset = base->key - cursor.leaf->data_len;
2222 * Calculate the gap, if any, and zero-fill it.
2224 * n is the offset of the start of the record verses our
2225 * current seek offset in the bio.
2227 n = (int)(rec_offset - (bio->bio_offset + boff));
2229 if (n > bp->b_bufsize - boff)
2230 n = bp->b_bufsize - boff;
2231 bzero((char *)bp->b_data + boff, n);
2237 * Calculate the data offset in the record and the number
2238 * of bytes we can copy.
2240 * There are two degenerate cases. First, boff may already
2241 * be at bp->b_bufsize. Secondly, the data offset within
2242 * the record may exceed the record's size.
2246 n = cursor.leaf->data_len - roff;
2248 kprintf("strategy_read: bad n=%d roff=%d\n", n, roff);
2250 } else if (n > bp->b_bufsize - boff) {
2251 n = bp->b_bufsize - boff;
2255 * Deal with cached truncations. This cool bit of code
2256 * allows truncate()/ftruncate() to avoid having to sync
2259 * If the frontend is truncated then all backend records are
2260 * subject to the frontend's truncation.
2262 * If the backend is truncated then backend records on-disk
2263 * (but not in-memory) are subject to the backend's
2264 * truncation. In-memory records owned by the backend
2265 * represent data written after the truncation point on the
2266 * backend and must not be truncated.
2268 * Truncate operations deal with frontend buffer cache
2269 * buffers and frontend-owned in-memory records synchronously.
2271 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2272 if (hammer_cursor_ondisk(&cursor) ||
2273 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2274 if (ip->trunc_off <= rec_offset)
2276 else if (ip->trunc_off < rec_offset + n)
2277 n = (int)(ip->trunc_off - rec_offset);
2280 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2281 if (hammer_cursor_ondisk(&cursor)) {
2282 if (ip->sync_trunc_off <= rec_offset)
2284 else if (ip->sync_trunc_off < rec_offset + n)
2285 n = (int)(ip->sync_trunc_off - rec_offset);
2290 * Try to issue a direct read into our bio if possible,
2291 * otherwise resolve the element data into a hammer_buffer
2294 * The buffer on-disk should be zerod past any real
2295 * truncation point, but may not be for any synthesized
2296 * truncation point from above.
2298 disk_offset = cursor.leaf->data_offset + roff;
2299 if (boff == 0 && n == bp->b_bufsize &&
2300 hammer_cursor_ondisk(&cursor) &&
2301 (disk_offset & HAMMER_BUFMASK) == 0) {
2302 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2303 HAMMER_ZONE_LARGE_DATA);
2304 nbio->bio_offset = disk_offset;
2305 error = hammer_io_direct_read(trans.hmp, nbio,
2309 error = hammer_ip_resolve_data(&cursor);
2311 bcopy((char *)cursor.data + roff,
2312 (char *)bp->b_data + boff, n);
2319 * Iterate until we have filled the request.
2322 if (boff == bp->b_bufsize)
2324 error = hammer_ip_next(&cursor);
2328 * There may have been a gap after the last record
2330 if (error == ENOENT)
2332 if (error == 0 && boff != bp->b_bufsize) {
2333 KKASSERT(boff < bp->b_bufsize);
2334 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
2335 /* boff = bp->b_bufsize; */
2338 bp->b_error = error;
2340 bp->b_flags |= B_ERROR;
2345 hammer_cache_node(&ip->cache[1], cursor.node);
2346 hammer_done_cursor(&cursor);
2347 hammer_done_transaction(&trans);
2352 * BMAP operation - used to support cluster_read() only.
2354 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
2356 * This routine may return EOPNOTSUPP if the opration is not supported for
2357 * the specified offset. The contents of the pointer arguments do not
2358 * need to be initialized in that case.
2360 * If a disk address is available and properly aligned return 0 with
2361 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
2362 * to the run-length relative to that offset. Callers may assume that
2363 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
2364 * large, so return EOPNOTSUPP if it is not sufficiently large.
2368 hammer_vop_bmap(struct vop_bmap_args *ap)
2370 struct hammer_transaction trans;
2371 struct hammer_inode *ip;
2372 struct hammer_cursor cursor;
2373 hammer_base_elm_t base;
2377 int64_t base_offset;
2378 int64_t base_disk_offset;
2379 int64_t last_offset;
2380 hammer_off_t last_disk_offset;
2381 hammer_off_t disk_offset;
2386 ++hammer_stats_file_iopsr;
2387 ip = ap->a_vp->v_data;
2390 * We can only BMAP regular files. We can't BMAP database files,
2393 if (ip->ino_data.obj_type != HAMMER_OBJTYPE_REGFILE)
2397 * bmap is typically called with runp/runb both NULL when used
2398 * for writing. We do not support BMAP for writing atm.
2400 if (ap->a_cmd != BUF_CMD_READ)
2404 * Scan the B-Tree to acquire blockmap addresses, then translate
2407 hammer_simple_transaction(&trans, ip->hmp);
2409 kprintf("bmap_beg %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2411 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2414 * Key range (begin and end inclusive) to scan. Note that the key's
2415 * stored in the actual records represent BASE+LEN, not BASE. The
2416 * first record containing bio_offset will have a key > bio_offset.
2418 cursor.key_beg.localization = ip->obj_localization +
2419 HAMMER_LOCALIZE_MISC;
2420 cursor.key_beg.obj_id = ip->obj_id;
2421 cursor.key_beg.create_tid = 0;
2422 cursor.key_beg.delete_tid = 0;
2423 cursor.key_beg.obj_type = 0;
2425 cursor.key_beg.key = ap->a_loffset - MAXPHYS + 1;
2427 cursor.key_beg.key = ap->a_loffset + 1;
2428 if (cursor.key_beg.key < 0)
2429 cursor.key_beg.key = 0;
2430 cursor.asof = ip->obj_asof;
2431 cursor.flags |= HAMMER_CURSOR_ASOF;
2433 cursor.key_end = cursor.key_beg;
2434 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2436 ran_end = ap->a_loffset + MAXPHYS;
2437 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2438 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2439 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2440 if (tmp64 < ran_end)
2441 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2443 cursor.key_end.key = ran_end + MAXPHYS + 1;
2445 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2447 error = hammer_ip_first(&cursor);
2448 base_offset = last_offset = 0;
2449 base_disk_offset = last_disk_offset = 0;
2451 while (error == 0) {
2453 * Get the base file offset of the record. The key for
2454 * data records is (base + bytes) rather then (base).
2456 * NOTE: rec_offset + rec_len may exceed the end-of-file.
2457 * The extra bytes should be zero on-disk and the BMAP op
2458 * should still be ok.
2460 base = &cursor.leaf->base;
2461 rec_offset = base->key - cursor.leaf->data_len;
2462 rec_len = cursor.leaf->data_len;
2465 * Incorporate any cached truncation.
2467 * NOTE: Modifications to rec_len based on synthesized
2468 * truncation points remove the guarantee that any extended
2469 * data on disk is zero (since the truncations may not have
2470 * taken place on-media yet).
2472 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2473 if (hammer_cursor_ondisk(&cursor) ||
2474 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2475 if (ip->trunc_off <= rec_offset)
2477 else if (ip->trunc_off < rec_offset + rec_len)
2478 rec_len = (int)(ip->trunc_off - rec_offset);
2481 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2482 if (hammer_cursor_ondisk(&cursor)) {
2483 if (ip->sync_trunc_off <= rec_offset)
2485 else if (ip->sync_trunc_off < rec_offset + rec_len)
2486 rec_len = (int)(ip->sync_trunc_off - rec_offset);
2491 * Accumulate information. If we have hit a discontiguous
2492 * block reset base_offset unless we are already beyond the
2493 * requested offset. If we are, that's it, we stop.
2497 if (hammer_cursor_ondisk(&cursor)) {
2498 disk_offset = cursor.leaf->data_offset;
2499 if (rec_offset != last_offset ||
2500 disk_offset != last_disk_offset) {
2501 if (rec_offset > ap->a_loffset)
2503 base_offset = rec_offset;
2504 base_disk_offset = disk_offset;
2506 last_offset = rec_offset + rec_len;
2507 last_disk_offset = disk_offset + rec_len;
2509 error = hammer_ip_next(&cursor);
2513 kprintf("BMAP %016llx: %016llx - %016llx\n",
2514 ap->a_loffset, base_offset, last_offset);
2515 kprintf("BMAP %16s: %016llx - %016llx\n",
2516 "", base_disk_offset, last_disk_offset);
2520 hammer_cache_node(&ip->cache[1], cursor.node);
2522 kprintf("bmap_end2 %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2525 hammer_done_cursor(&cursor);
2526 hammer_done_transaction(&trans);
2529 * If we couldn't find any records or the records we did find were
2530 * all behind the requested offset, return failure. A forward
2531 * truncation can leave a hole w/ no on-disk records.
2533 if (last_offset == 0 || last_offset < ap->a_loffset)
2534 return (EOPNOTSUPP);
2537 * Figure out the block size at the requested offset and adjust
2538 * our limits so the cluster_read() does not create inappropriately
2539 * sized buffer cache buffers.
2541 blksize = hammer_blocksize(ap->a_loffset);
2542 if (hammer_blocksize(base_offset) != blksize) {
2543 base_offset = hammer_blockdemarc(base_offset, ap->a_loffset);
2545 if (last_offset != ap->a_loffset &&
2546 hammer_blocksize(last_offset - 1) != blksize) {
2547 last_offset = hammer_blockdemarc(ap->a_loffset,
2552 * Returning EOPNOTSUPP simply prevents the direct-IO optimization
2555 disk_offset = base_disk_offset + (ap->a_loffset - base_offset);
2557 if ((disk_offset & HAMMER_OFF_ZONE_MASK) != HAMMER_ZONE_LARGE_DATA) {
2559 * Only large-data zones can be direct-IOd
2562 } else if ((disk_offset & HAMMER_BUFMASK) ||
2563 (last_offset - ap->a_loffset) < blksize) {
2565 * doffsetp is not aligned or the forward run size does
2566 * not cover a whole buffer, disallow the direct I/O.
2573 *ap->a_doffsetp = disk_offset;
2575 *ap->a_runb = ap->a_loffset - base_offset;
2576 KKASSERT(*ap->a_runb >= 0);
2579 *ap->a_runp = last_offset - ap->a_loffset;
2580 KKASSERT(*ap->a_runp >= 0);
2588 * Write to a regular file. Because this is a strategy call the OS is
2589 * trying to actually get data onto the media.
2593 hammer_vop_strategy_write(struct vop_strategy_args *ap)
2595 hammer_record_t record;
2606 ip = ap->a_vp->v_data;
2609 blksize = hammer_blocksize(bio->bio_offset);
2610 KKASSERT(bp->b_bufsize == blksize);
2612 if (ip->flags & HAMMER_INODE_RO) {
2613 bp->b_error = EROFS;
2614 bp->b_flags |= B_ERROR;
2620 * Interlock with inode destruction (no in-kernel or directory
2621 * topology visibility). If we queue new IO while trying to
2622 * destroy the inode we can deadlock the vtrunc call in
2623 * hammer_inode_unloadable_check().
2625 * Besides, there's no point flushing a bp associated with an
2626 * inode that is being destroyed on-media and has no kernel
2629 if ((ip->flags | ip->sync_flags) &
2630 (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) {
2637 * Reserve space and issue a direct-write from the front-end.
2638 * NOTE: The direct_io code will hammer_bread/bcopy smaller
2641 * An in-memory record will be installed to reference the storage
2642 * until the flusher can get to it.
2644 * Since we own the high level bio the front-end will not try to
2645 * do a direct-read until the write completes.
2647 * NOTE: The only time we do not reserve a full-sized buffers
2648 * worth of data is if the file is small. We do not try to
2649 * allocate a fragment (from the small-data zone) at the end of
2650 * an otherwise large file as this can lead to wildly separated
2653 KKASSERT((bio->bio_offset & HAMMER_BUFMASK) == 0);
2654 KKASSERT(bio->bio_offset < ip->ino_data.size);
2655 if (bio->bio_offset || ip->ino_data.size > HAMMER_BUFSIZE / 2)
2656 bytes = bp->b_bufsize;
2658 bytes = ((int)ip->ino_data.size + 15) & ~15;
2660 record = hammer_ip_add_bulk(ip, bio->bio_offset, bp->b_data,
2663 hammer_io_direct_write(hmp, record, bio);
2664 if (ip->rsv_recs > 1 && hmp->rsv_recs > hammer_limit_recs)
2665 hammer_flush_inode(ip, 0);
2667 bp->b_bio2.bio_offset = NOOFFSET;
2668 bp->b_error = error;
2669 bp->b_flags |= B_ERROR;
2676 * dounlink - disconnect a directory entry
2678 * XXX whiteout support not really in yet
2681 hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
2682 struct vnode *dvp, struct ucred *cred,
2683 int flags, int isdir)
2685 struct namecache *ncp;
2688 struct hammer_cursor cursor;
2690 u_int32_t max_iterations;
2694 * Calculate the namekey and setup the key range for the scan. This
2695 * works kinda like a chained hash table where the lower 32 bits
2696 * of the namekey synthesize the chain.
2698 * The key range is inclusive of both key_beg and key_end.
2703 if (dip->flags & HAMMER_INODE_RO)
2706 namekey = hammer_directory_namekey(dip, ncp->nc_name, ncp->nc_nlen,
2709 hammer_init_cursor(trans, &cursor, &dip->cache[1], dip);
2710 cursor.key_beg.localization = dip->obj_localization +
2711 HAMMER_LOCALIZE_MISC;
2712 cursor.key_beg.obj_id = dip->obj_id;
2713 cursor.key_beg.key = namekey;
2714 cursor.key_beg.create_tid = 0;
2715 cursor.key_beg.delete_tid = 0;
2716 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2717 cursor.key_beg.obj_type = 0;
2719 cursor.key_end = cursor.key_beg;
2720 cursor.key_end.key += max_iterations;
2721 cursor.asof = dip->obj_asof;
2722 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
2725 * Scan all matching records (the chain), locate the one matching
2726 * the requested path component. info->last_error contains the
2727 * error code on search termination and could be 0, ENOENT, or
2730 * The hammer_ip_*() functions merge in-memory records with on-disk
2731 * records for the purposes of the search.
2733 error = hammer_ip_first(&cursor);
2735 while (error == 0) {
2736 error = hammer_ip_resolve_data(&cursor);
2739 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
2741 if (ncp->nc_nlen == nlen &&
2742 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
2745 error = hammer_ip_next(&cursor);
2749 * If all is ok we have to get the inode so we can adjust nlinks.
2750 * To avoid a deadlock with the flusher we must release the inode
2751 * lock on the directory when acquiring the inode for the entry.
2753 * If the target is a directory, it must be empty.
2756 hammer_unlock(&cursor.ip->lock);
2757 ip = hammer_get_inode(trans, dip, cursor.data->entry.obj_id,
2759 cursor.data->entry.localization,
2761 hammer_lock_sh(&cursor.ip->lock);
2762 if (error == ENOENT) {
2763 kprintf("obj_id %016llx\n", cursor.data->entry.obj_id);
2764 Debugger("ENOENT unlinking object that should exist");
2768 * If isdir >= 0 we validate that the entry is or is not a
2769 * directory. If isdir < 0 we don't care.
2771 if (error == 0 && isdir >= 0) {
2773 ip->ino_data.obj_type != HAMMER_OBJTYPE_DIRECTORY) {
2775 } else if (isdir == 0 &&
2776 ip->ino_data.obj_type == HAMMER_OBJTYPE_DIRECTORY) {
2782 * If we are trying to remove a directory the directory must
2785 * WARNING: hammer_ip_check_directory_empty() may have to
2786 * terminate the cursor to avoid a deadlock. It is ok to
2787 * call hammer_done_cursor() twice.
2789 if (error == 0 && ip->ino_data.obj_type ==
2790 HAMMER_OBJTYPE_DIRECTORY) {
2791 error = hammer_ip_check_directory_empty(trans, ip);
2795 * Delete the directory entry.
2797 * WARNING: hammer_ip_del_directory() may have to terminate
2798 * the cursor to avoid a deadlock. It is ok to call
2799 * hammer_done_cursor() twice.
2802 error = hammer_ip_del_directory(trans, &cursor,
2805 hammer_done_cursor(&cursor);
2807 cache_setunresolved(nch);
2808 cache_setvp(nch, NULL);
2811 hammer_knote(ip->vp, NOTE_DELETE);
2812 cache_inval_vp(ip->vp, CINV_DESTROY);
2816 hammer_rel_inode(ip, 0);
2818 hammer_done_cursor(&cursor);
2820 if (error == EDEADLK)
2826 /************************************************************************
2827 * FIFO AND SPECFS OPS *
2828 ************************************************************************
2833 hammer_vop_fifoclose (struct vop_close_args *ap)
2835 /* XXX update itimes */
2836 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
2840 hammer_vop_fiforead (struct vop_read_args *ap)
2844 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2845 /* XXX update access time */
2850 hammer_vop_fifowrite (struct vop_write_args *ap)
2854 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2855 /* XXX update access time */
2861 hammer_vop_fifokqfilter(struct vop_kqfilter_args *ap)
2865 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2867 error = hammer_vop_kqfilter(ap);
2872 hammer_vop_specclose (struct vop_close_args *ap)
2874 /* XXX update itimes */
2875 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2879 hammer_vop_specread (struct vop_read_args *ap)
2881 /* XXX update access time */
2882 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2886 hammer_vop_specwrite (struct vop_write_args *ap)
2888 /* XXX update last change time */
2889 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2892 /************************************************************************
2894 ************************************************************************
2897 static void filt_hammerdetach(struct knote *kn);
2898 static int filt_hammerread(struct knote *kn, long hint);
2899 static int filt_hammerwrite(struct knote *kn, long hint);
2900 static int filt_hammervnode(struct knote *kn, long hint);
2902 static struct filterops hammerread_filtops =
2903 { 1, NULL, filt_hammerdetach, filt_hammerread };
2904 static struct filterops hammerwrite_filtops =
2905 { 1, NULL, filt_hammerdetach, filt_hammerwrite };
2906 static struct filterops hammervnode_filtops =
2907 { 1, NULL, filt_hammerdetach, filt_hammervnode };
2911 hammer_vop_kqfilter(struct vop_kqfilter_args *ap)
2913 struct vnode *vp = ap->a_vp;
2914 struct knote *kn = ap->a_kn;
2917 switch (kn->kn_filter) {
2919 kn->kn_fop = &hammerread_filtops;
2922 kn->kn_fop = &hammerwrite_filtops;
2925 kn->kn_fop = &hammervnode_filtops;
2931 kn->kn_hook = (caddr_t)vp;
2933 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
2934 SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext);
2935 lwkt_reltoken(&ilock);
2941 filt_hammerdetach(struct knote *kn)
2943 struct vnode *vp = (void *)kn->kn_hook;
2946 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
2947 SLIST_REMOVE(&vp->v_pollinfo.vpi_selinfo.si_note,
2948 kn, knote, kn_selnext);
2949 lwkt_reltoken(&ilock);
2953 filt_hammerread(struct knote *kn, long hint)
2955 struct vnode *vp = (void *)kn->kn_hook;
2956 hammer_inode_t ip = VTOI(vp);
2958 if (hint == NOTE_REVOKE) {
2959 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2962 kn->kn_data = ip->ino_data.size - kn->kn_fp->f_offset;
2963 return (kn->kn_data != 0);
2967 filt_hammerwrite(struct knote *kn, long hint)
2969 if (hint == NOTE_REVOKE)
2970 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2976 filt_hammervnode(struct knote *kn, long hint)
2978 if (kn->kn_sfflags & hint)
2979 kn->kn_fflags |= hint;
2980 if (hint == NOTE_REVOKE) {
2981 kn->kn_flags |= EV_EOF;
2984 return (kn->kn_fflags != 0);