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_markatime(struct vop_markatime_args *);
77 static int hammer_vop_setattr(struct vop_setattr_args *);
78 static int hammer_vop_strategy(struct vop_strategy_args *);
79 static int hammer_vop_bmap(struct vop_bmap_args *ap);
80 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
81 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
82 static int hammer_vop_ioctl(struct vop_ioctl_args *);
83 static int hammer_vop_mountctl(struct vop_mountctl_args *);
84 static int hammer_vop_kqfilter (struct vop_kqfilter_args *);
86 static int hammer_vop_fifoclose (struct vop_close_args *);
87 static int hammer_vop_fiforead (struct vop_read_args *);
88 static int hammer_vop_fifowrite (struct vop_write_args *);
89 static int hammer_vop_fifokqfilter (struct vop_kqfilter_args *);
91 static int hammer_vop_specclose (struct vop_close_args *);
92 static int hammer_vop_specread (struct vop_read_args *);
93 static int hammer_vop_specwrite (struct vop_write_args *);
94 static int hammer_vop_specgetattr (struct vop_getattr_args *);
96 struct vop_ops hammer_vnode_vops = {
97 .vop_default = vop_defaultop,
98 .vop_fsync = hammer_vop_fsync,
99 .vop_getpages = vop_stdgetpages,
100 .vop_putpages = vop_stdputpages,
101 .vop_read = hammer_vop_read,
102 .vop_write = hammer_vop_write,
103 .vop_access = hammer_vop_access,
104 .vop_advlock = hammer_vop_advlock,
105 .vop_close = hammer_vop_close,
106 .vop_ncreate = hammer_vop_ncreate,
107 .vop_getattr = hammer_vop_getattr,
108 .vop_inactive = hammer_vop_inactive,
109 .vop_reclaim = hammer_vop_reclaim,
110 .vop_nresolve = hammer_vop_nresolve,
111 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
112 .vop_nlink = hammer_vop_nlink,
113 .vop_nmkdir = hammer_vop_nmkdir,
114 .vop_nmknod = hammer_vop_nmknod,
115 .vop_open = hammer_vop_open,
116 .vop_pathconf = vop_stdpathconf,
117 .vop_print = hammer_vop_print,
118 .vop_readdir = hammer_vop_readdir,
119 .vop_readlink = hammer_vop_readlink,
120 .vop_nremove = hammer_vop_nremove,
121 .vop_nrename = hammer_vop_nrename,
122 .vop_nrmdir = hammer_vop_nrmdir,
123 .vop_markatime = hammer_vop_markatime,
124 .vop_setattr = hammer_vop_setattr,
125 .vop_bmap = hammer_vop_bmap,
126 .vop_strategy = hammer_vop_strategy,
127 .vop_nsymlink = hammer_vop_nsymlink,
128 .vop_nwhiteout = hammer_vop_nwhiteout,
129 .vop_ioctl = hammer_vop_ioctl,
130 .vop_mountctl = hammer_vop_mountctl,
131 .vop_kqfilter = hammer_vop_kqfilter
134 struct vop_ops hammer_spec_vops = {
135 .vop_default = spec_vnoperate,
136 .vop_fsync = hammer_vop_fsync,
137 .vop_read = hammer_vop_specread,
138 .vop_write = hammer_vop_specwrite,
139 .vop_access = hammer_vop_access,
140 .vop_close = hammer_vop_specclose,
141 .vop_markatime = hammer_vop_markatime,
142 .vop_getattr = hammer_vop_specgetattr,
143 .vop_inactive = hammer_vop_inactive,
144 .vop_reclaim = hammer_vop_reclaim,
145 .vop_setattr = hammer_vop_setattr
148 struct vop_ops hammer_fifo_vops = {
149 .vop_default = fifo_vnoperate,
150 .vop_fsync = hammer_vop_fsync,
151 .vop_read = hammer_vop_fiforead,
152 .vop_write = hammer_vop_fifowrite,
153 .vop_access = hammer_vop_access,
154 .vop_close = hammer_vop_fifoclose,
155 .vop_markatime = hammer_vop_markatime,
156 .vop_getattr = hammer_vop_getattr,
157 .vop_inactive = hammer_vop_inactive,
158 .vop_reclaim = hammer_vop_reclaim,
159 .vop_setattr = hammer_vop_setattr,
160 .vop_kqfilter = hammer_vop_fifokqfilter
165 hammer_knote(struct vnode *vp, int flags)
168 KNOTE(&vp->v_pollinfo.vpi_selinfo.si_note, flags);
171 #ifdef DEBUG_TRUNCATE
172 struct hammer_inode *HammerTruncIp;
175 static int hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
176 struct vnode *dvp, struct ucred *cred,
177 int flags, int isdir);
178 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
179 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
184 hammer_vop_vnoperate(struct vop_generic_args *)
186 return (VOCALL(&hammer_vnode_vops, ap));
191 * hammer_vop_fsync { vp, waitfor }
193 * fsync() an inode to disk and wait for it to be completely committed
194 * such that the information would not be undone if a crash occured after
199 hammer_vop_fsync(struct vop_fsync_args *ap)
201 hammer_inode_t ip = VTOI(ap->a_vp);
203 ++hammer_count_fsyncs;
204 vfsync(ap->a_vp, ap->a_waitfor, 1, NULL, NULL);
205 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
206 if (ap->a_waitfor == MNT_WAIT) {
208 hammer_wait_inode(ip);
209 vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY);
215 * hammer_vop_read { vp, uio, ioflag, cred }
219 hammer_vop_read(struct vop_read_args *ap)
221 struct hammer_transaction trans;
232 if (ap->a_vp->v_type != VREG)
239 * Allow the UIO's size to override the sequential heuristic.
241 blksize = hammer_blocksize(uio->uio_offset);
242 seqcount = (uio->uio_resid + (blksize - 1)) / blksize;
243 ioseqcount = ap->a_ioflag >> 16;
244 if (seqcount < ioseqcount)
245 seqcount = ioseqcount;
247 hammer_start_transaction(&trans, ip->hmp);
250 * Access the data typically in HAMMER_BUFSIZE blocks via the
251 * buffer cache, but HAMMER may use a variable block size based
254 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_data.size) {
258 blksize = hammer_blocksize(uio->uio_offset);
259 offset = (int)uio->uio_offset & (blksize - 1);
260 base_offset = uio->uio_offset - offset;
262 if (hammer_cluster_enable) {
264 * Use file_limit to prevent cluster_read() from
265 * creating buffers of the wrong block size past
268 file_limit = ip->ino_data.size;
269 if (base_offset < HAMMER_XDEMARC &&
270 file_limit > HAMMER_XDEMARC) {
271 file_limit = HAMMER_XDEMARC;
273 error = cluster_read(ap->a_vp,
274 file_limit, base_offset,
278 error = bread(ap->a_vp, base_offset, blksize, &bp);
281 kprintf("error %d\n", error);
286 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
287 n = blksize - offset;
288 if (n > uio->uio_resid)
290 if (n > ip->ino_data.size - uio->uio_offset)
291 n = (int)(ip->ino_data.size - uio->uio_offset);
292 error = uiomove((char *)bp->b_data + offset, n, uio);
294 /* data has a lower priority then meta-data */
295 bp->b_flags |= B_AGE;
299 hammer_stats_file_read += n;
301 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
302 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
303 ip->ino_data.atime = trans.time;
304 hammer_modify_inode(ip, HAMMER_INODE_ATIME);
306 hammer_done_transaction(&trans);
311 * hammer_vop_write { vp, uio, ioflag, cred }
315 hammer_vop_write(struct vop_write_args *ap)
317 struct hammer_transaction trans;
318 struct hammer_inode *ip;
331 if (ap->a_vp->v_type != VREG)
337 seqcount = ap->a_ioflag >> 16;
339 if (ip->flags & HAMMER_INODE_RO)
343 * Create a transaction to cover the operations we perform.
345 hammer_start_transaction(&trans, hmp);
351 if (ap->a_ioflag & IO_APPEND)
352 uio->uio_offset = ip->ino_data.size;
355 * Check for illegal write offsets. Valid range is 0...2^63-1.
357 * NOTE: the base_off assignment is required to work around what
358 * I consider to be a GCC-4 optimization bug.
360 if (uio->uio_offset < 0) {
361 hammer_done_transaction(&trans);
364 base_offset = uio->uio_offset + uio->uio_resid; /* work around gcc-4 */
365 if (uio->uio_resid > 0 && base_offset <= 0) {
366 hammer_done_transaction(&trans);
371 * Access the data typically in HAMMER_BUFSIZE blocks via the
372 * buffer cache, but HAMMER may use a variable block size based
375 while (uio->uio_resid > 0) {
380 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE)) != 0)
383 blksize = hammer_blocksize(uio->uio_offset);
386 * Do not allow HAMMER to blow out the buffer cache. Very
387 * large UIOs can lockout other processes due to bwillwrite()
390 * The hammer inode is not locked during these operations.
391 * The vnode is locked which can interfere with the pageout
392 * daemon for non-UIO_NOCOPY writes but should not interfere
393 * with the buffer cache. Even so, we cannot afford to
394 * allow the pageout daemon to build up too many dirty buffer
397 * Only call this if we aren't being recursively called from
398 * a virtual disk device (vn), else we may deadlock.
400 if ((ap->a_ioflag & IO_RECURSE) == 0)
404 * Do not allow HAMMER to blow out system memory by
405 * accumulating too many records. Records are so well
406 * decoupled from the buffer cache that it is possible
407 * for userland to push data out to the media via
408 * direct-write, but build up the records queued to the
409 * backend faster then the backend can flush them out.
410 * HAMMER has hit its write limit but the frontend has
411 * no pushback to slow it down.
413 if (hmp->rsv_recs > hammer_limit_recs / 2) {
415 * Get the inode on the flush list
417 if (ip->rsv_recs >= 64)
418 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
419 else if (ip->rsv_recs >= 16)
420 hammer_flush_inode(ip, 0);
423 * Keep the flusher going if the system keeps
426 delta = hmp->count_newrecords -
427 hmp->last_newrecords;
428 if (delta < 0 || delta > hammer_limit_recs / 2) {
429 hmp->last_newrecords = hmp->count_newrecords;
430 hammer_sync_hmp(hmp, MNT_NOWAIT);
434 * If we have gotten behind start slowing
437 delta = (hmp->rsv_recs - hammer_limit_recs) *
438 hz / hammer_limit_recs;
440 tsleep(&trans, 0, "hmrslo", delta);
444 * Calculate the blocksize at the current offset and figure
445 * out how much we can actually write.
447 blkmask = blksize - 1;
448 offset = (int)uio->uio_offset & blkmask;
449 base_offset = uio->uio_offset & ~(int64_t)blkmask;
450 n = blksize - offset;
451 if (n > uio->uio_resid)
453 if (uio->uio_offset + n > ip->ino_data.size) {
454 vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
456 kflags |= NOTE_EXTEND;
459 if (uio->uio_segflg == UIO_NOCOPY) {
461 * Issuing a write with the same data backing the
462 * buffer. Instantiate the buffer to collect the
463 * backing vm pages, then read-in any missing bits.
465 * This case is used by vop_stdputpages().
467 bp = getblk(ap->a_vp, base_offset,
468 blksize, GETBLK_BHEAVY, 0);
469 if ((bp->b_flags & B_CACHE) == 0) {
471 error = bread(ap->a_vp, base_offset,
474 } else if (offset == 0 && uio->uio_resid >= blksize) {
476 * Even though we are entirely overwriting the buffer
477 * we may still have to zero it out to avoid a
478 * mmap/write visibility issue.
480 bp = getblk(ap->a_vp, base_offset, blksize, GETBLK_BHEAVY, 0);
481 if ((bp->b_flags & B_CACHE) == 0)
483 } else if (base_offset >= ip->ino_data.size) {
485 * If the base offset of the buffer is beyond the
486 * file EOF, we don't have to issue a read.
488 bp = getblk(ap->a_vp, base_offset,
489 blksize, GETBLK_BHEAVY, 0);
493 * Partial overwrite, read in any missing bits then
494 * replace the portion being written.
496 error = bread(ap->a_vp, base_offset, blksize, &bp);
501 error = uiomove((char *)bp->b_data + offset,
506 * If we screwed up we have to undo any VM size changes we
512 vtruncbuf(ap->a_vp, ip->ino_data.size,
513 hammer_blocksize(ip->ino_data.size));
517 kflags |= NOTE_WRITE;
518 hammer_stats_file_write += n;
519 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
520 if (ip->ino_data.size < uio->uio_offset) {
521 ip->ino_data.size = uio->uio_offset;
522 flags = HAMMER_INODE_DDIRTY;
523 vnode_pager_setsize(ap->a_vp, ip->ino_data.size);
527 ip->ino_data.mtime = trans.time;
528 flags |= HAMMER_INODE_MTIME | HAMMER_INODE_BUFS;
529 hammer_modify_inode(ip, flags);
532 * Once we dirty the buffer any cached zone-X offset
533 * becomes invalid. HAMMER NOTE: no-history mode cannot
534 * allow overwriting over the same data sector unless
535 * we provide UNDOs for the old data, which we don't.
537 bp->b_bio2.bio_offset = NOOFFSET;
540 * Final buffer disposition.
542 bp->b_flags |= B_AGE;
543 if (ap->a_ioflag & IO_SYNC) {
545 } else if (ap->a_ioflag & IO_DIRECT) {
551 hammer_done_transaction(&trans);
552 hammer_knote(ap->a_vp, kflags);
557 * hammer_vop_access { vp, mode, cred }
561 hammer_vop_access(struct vop_access_args *ap)
563 struct hammer_inode *ip = VTOI(ap->a_vp);
568 ++hammer_stats_file_iopsr;
569 uid = hammer_to_unix_xid(&ip->ino_data.uid);
570 gid = hammer_to_unix_xid(&ip->ino_data.gid);
572 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
573 ip->ino_data.uflags);
578 * hammer_vop_advlock { vp, id, op, fl, flags }
582 hammer_vop_advlock(struct vop_advlock_args *ap)
584 hammer_inode_t ip = VTOI(ap->a_vp);
586 return (lf_advlock(ap, &ip->advlock, ip->ino_data.size));
590 * hammer_vop_close { vp, fflag }
594 hammer_vop_close(struct vop_close_args *ap)
596 /*hammer_inode_t ip = VTOI(ap->a_vp);*/
597 return (vop_stdclose(ap));
601 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
603 * The operating system has already ensured that the directory entry
604 * does not exist and done all appropriate namespace locking.
608 hammer_vop_ncreate(struct vop_ncreate_args *ap)
610 struct hammer_transaction trans;
611 struct hammer_inode *dip;
612 struct hammer_inode *nip;
613 struct nchandle *nch;
617 dip = VTOI(ap->a_dvp);
619 if (dip->flags & HAMMER_INODE_RO)
621 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
625 * Create a transaction to cover the operations we perform.
627 hammer_start_transaction(&trans, dip->hmp);
628 ++hammer_stats_file_iopsw;
631 * Create a new filesystem object of the requested type. The
632 * returned inode will be referenced and shared-locked to prevent
633 * it from being moved to the flusher.
636 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
639 hkprintf("hammer_create_inode error %d\n", error);
640 hammer_done_transaction(&trans);
646 * Add the new filesystem object to the directory. This will also
647 * bump the inode's link count.
649 error = hammer_ip_add_directory(&trans, dip,
650 nch->ncp->nc_name, nch->ncp->nc_nlen,
653 hkprintf("hammer_ip_add_directory error %d\n", error);
659 hammer_rel_inode(nip, 0);
660 hammer_done_transaction(&trans);
663 error = hammer_get_vnode(nip, ap->a_vpp);
664 hammer_done_transaction(&trans);
665 hammer_rel_inode(nip, 0);
667 cache_setunresolved(ap->a_nch);
668 cache_setvp(ap->a_nch, *ap->a_vpp);
670 hammer_knote(ap->a_dvp, NOTE_WRITE);
676 * hammer_vop_getattr { vp, vap }
678 * Retrieve an inode's attribute information. When accessing inodes
679 * historically we fake the atime field to ensure consistent results.
680 * The atime field is stored in the B-Tree element and allowed to be
681 * updated without cycling the element.
685 hammer_vop_getattr(struct vop_getattr_args *ap)
687 struct hammer_inode *ip = VTOI(ap->a_vp);
688 struct vattr *vap = ap->a_vap;
691 * We want the fsid to be different when accessing a filesystem
692 * with different as-of's so programs like diff don't think
693 * the files are the same.
695 * We also want the fsid to be the same when comparing snapshots,
696 * or when comparing mirrors (which might be backed by different
697 * physical devices). HAMMER fsids are based on the PFS's
700 * XXX there is a chance of collision here. The va_fsid reported
701 * by stat is different from the more involved fsid used in the
704 ++hammer_stats_file_iopsr;
705 vap->va_fsid = ip->pfsm->fsid_udev ^ (u_int32_t)ip->obj_asof ^
706 (u_int32_t)(ip->obj_asof >> 32);
708 vap->va_fileid = ip->ino_leaf.base.obj_id;
709 vap->va_mode = ip->ino_data.mode;
710 vap->va_nlink = ip->ino_data.nlinks;
711 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
712 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
715 vap->va_size = ip->ino_data.size;
718 * Special case for @@PFS softlinks. The actual size of the
719 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
720 * or for MAX_TID is "@@-1:%05d" == 10 bytes.
722 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_SOFTLINK &&
723 ip->ino_data.size == 10 &&
724 ip->obj_asof == HAMMER_MAX_TID &&
725 ip->obj_localization == 0 &&
726 strncmp(ip->ino_data.ext.symlink, "@@PFS", 5) == 0) {
727 if (ip->pfsm->pfsd.mirror_flags & HAMMER_PFSD_SLAVE)
734 * We must provide a consistent atime and mtime for snapshots
735 * so people can do a 'tar cf - ... | md5' on them and get
736 * consistent results.
738 if (ip->flags & HAMMER_INODE_RO) {
739 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_atime);
740 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_mtime);
742 hammer_time_to_timespec(ip->ino_data.atime, &vap->va_atime);
743 hammer_time_to_timespec(ip->ino_data.mtime, &vap->va_mtime);
745 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
746 vap->va_flags = ip->ino_data.uflags;
747 vap->va_gen = 1; /* hammer inums are unique for all time */
748 vap->va_blocksize = HAMMER_BUFSIZE;
749 if (ip->ino_data.size >= HAMMER_XDEMARC) {
750 vap->va_bytes = (ip->ino_data.size + HAMMER_XBUFMASK64) &
752 } else if (ip->ino_data.size > HAMMER_BUFSIZE / 2) {
753 vap->va_bytes = (ip->ino_data.size + HAMMER_BUFMASK64) &
756 vap->va_bytes = (ip->ino_data.size + 15) & ~15;
759 vap->va_type = hammer_get_vnode_type(ip->ino_data.obj_type);
760 vap->va_filerev = 0; /* XXX */
761 /* mtime uniquely identifies any adjustments made to the file XXX */
762 vap->va_fsmid = ip->ino_data.mtime;
763 vap->va_uid_uuid = ip->ino_data.uid;
764 vap->va_gid_uuid = ip->ino_data.gid;
765 vap->va_fsid_uuid = ip->hmp->fsid;
766 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
769 switch (ip->ino_data.obj_type) {
770 case HAMMER_OBJTYPE_CDEV:
771 case HAMMER_OBJTYPE_BDEV:
772 vap->va_rmajor = ip->ino_data.rmajor;
773 vap->va_rminor = ip->ino_data.rminor;
782 * hammer_vop_nresolve { nch, dvp, cred }
784 * Locate the requested directory entry.
788 hammer_vop_nresolve(struct vop_nresolve_args *ap)
790 struct hammer_transaction trans;
791 struct namecache *ncp;
795 struct hammer_cursor cursor;
804 u_int32_t localization;
805 u_int32_t max_iterations;
808 * Misc initialization, plus handle as-of name extensions. Look for
809 * the '@@' extension. Note that as-of files and directories cannot
812 dip = VTOI(ap->a_dvp);
813 ncp = ap->a_nch->ncp;
814 asof = dip->obj_asof;
815 localization = dip->obj_localization; /* for code consistency */
817 flags = dip->flags & HAMMER_INODE_RO;
820 hammer_simple_transaction(&trans, dip->hmp);
821 ++hammer_stats_file_iopsr;
823 for (i = 0; i < nlen; ++i) {
824 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
825 error = hammer_str_to_tid(ncp->nc_name + i + 2,
826 &ispfs, &asof, &localization);
831 if (asof != HAMMER_MAX_TID)
832 flags |= HAMMER_INODE_RO;
839 * If this is a PFS softlink we dive into the PFS
841 if (ispfs && nlen == 0) {
842 ip = hammer_get_inode(&trans, dip, HAMMER_OBJID_ROOT,
846 error = hammer_get_vnode(ip, &vp);
847 hammer_rel_inode(ip, 0);
853 cache_setvp(ap->a_nch, vp);
860 * If there is no path component the time extension is relative to dip.
861 * e.g. "fubar/@@<snapshot>"
863 * "." is handled by the kernel, but ".@@<snapshot>" is not.
864 * e.g. "fubar/.@@<snapshot>"
866 * ".." is handled by the kernel. We do not currently handle
869 if (nlen == 0 || (nlen == 1 && ncp->nc_name[0] == '.')) {
870 ip = hammer_get_inode(&trans, dip, dip->obj_id,
871 asof, dip->obj_localization,
874 error = hammer_get_vnode(ip, &vp);
875 hammer_rel_inode(ip, 0);
881 cache_setvp(ap->a_nch, vp);
888 * Calculate the namekey and setup the key range for the scan. This
889 * works kinda like a chained hash table where the lower 32 bits
890 * of the namekey synthesize the chain.
892 * The key range is inclusive of both key_beg and key_end.
894 namekey = hammer_directory_namekey(dip, ncp->nc_name, nlen,
897 error = hammer_init_cursor(&trans, &cursor, &dip->cache[1], dip);
898 cursor.key_beg.localization = dip->obj_localization +
899 HAMMER_LOCALIZE_MISC;
900 cursor.key_beg.obj_id = dip->obj_id;
901 cursor.key_beg.key = namekey;
902 cursor.key_beg.create_tid = 0;
903 cursor.key_beg.delete_tid = 0;
904 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
905 cursor.key_beg.obj_type = 0;
907 cursor.key_end = cursor.key_beg;
908 cursor.key_end.key += max_iterations;
910 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
913 * Scan all matching records (the chain), locate the one matching
914 * the requested path component.
916 * The hammer_ip_*() functions merge in-memory records with on-disk
917 * records for the purposes of the search.
920 localization = HAMMER_DEF_LOCALIZATION;
923 error = hammer_ip_first(&cursor);
925 error = hammer_ip_resolve_data(&cursor);
928 if (nlen == cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF &&
929 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
930 obj_id = cursor.data->entry.obj_id;
931 localization = cursor.data->entry.localization;
934 error = hammer_ip_next(&cursor);
937 hammer_done_cursor(&cursor);
940 * Lookup the obj_id. This should always succeed. If it does not
941 * the filesystem may be damaged and we return a dummy inode.
944 ip = hammer_get_inode(&trans, dip, obj_id,
947 if (error == ENOENT) {
948 kprintf("HAMMER: WARNING: Missing "
949 "inode for dirent \"%s\"\n"
950 "\tobj_id = %016llx\n",
951 ncp->nc_name, (long long)obj_id);
953 ip = hammer_get_dummy_inode(&trans, dip, obj_id,
958 error = hammer_get_vnode(ip, &vp);
959 hammer_rel_inode(ip, 0);
965 cache_setvp(ap->a_nch, vp);
968 } else if (error == ENOENT) {
969 cache_setvp(ap->a_nch, NULL);
972 hammer_done_transaction(&trans);
977 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
979 * Locate the parent directory of a directory vnode.
981 * dvp is referenced but not locked. *vpp must be returned referenced and
982 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
983 * at the root, instead it could indicate that the directory we were in was
986 * NOTE: as-of sequences are not linked into the directory structure. If
987 * we are at the root with a different asof then the mount point, reload
988 * the same directory with the mount point's asof. I'm not sure what this
989 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
990 * get confused, but it hasn't been tested.
994 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
996 struct hammer_transaction trans;
997 struct hammer_inode *dip;
998 struct hammer_inode *ip;
999 int64_t parent_obj_id;
1000 u_int32_t parent_obj_localization;
1004 dip = VTOI(ap->a_dvp);
1005 asof = dip->obj_asof;
1008 * Whos are parent? This could be the root of a pseudo-filesystem
1009 * whos parent is in another localization domain.
1011 parent_obj_id = dip->ino_data.parent_obj_id;
1012 if (dip->obj_id == HAMMER_OBJID_ROOT)
1013 parent_obj_localization = dip->ino_data.ext.obj.parent_obj_localization;
1015 parent_obj_localization = dip->obj_localization;
1017 if (parent_obj_id == 0) {
1018 if (dip->obj_id == HAMMER_OBJID_ROOT &&
1019 asof != dip->hmp->asof) {
1020 parent_obj_id = dip->obj_id;
1021 asof = dip->hmp->asof;
1022 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
1023 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
1031 hammer_simple_transaction(&trans, dip->hmp);
1032 ++hammer_stats_file_iopsr;
1034 ip = hammer_get_inode(&trans, dip, parent_obj_id,
1035 asof, parent_obj_localization,
1036 dip->flags, &error);
1038 error = hammer_get_vnode(ip, ap->a_vpp);
1039 hammer_rel_inode(ip, 0);
1043 hammer_done_transaction(&trans);
1048 * hammer_vop_nlink { nch, dvp, vp, cred }
1052 hammer_vop_nlink(struct vop_nlink_args *ap)
1054 struct hammer_transaction trans;
1055 struct hammer_inode *dip;
1056 struct hammer_inode *ip;
1057 struct nchandle *nch;
1060 if (ap->a_dvp->v_mount != ap->a_vp->v_mount)
1064 dip = VTOI(ap->a_dvp);
1065 ip = VTOI(ap->a_vp);
1067 if (dip->obj_localization != ip->obj_localization)
1070 if (dip->flags & HAMMER_INODE_RO)
1072 if (ip->flags & HAMMER_INODE_RO)
1074 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1078 * Create a transaction to cover the operations we perform.
1080 hammer_start_transaction(&trans, dip->hmp);
1081 ++hammer_stats_file_iopsw;
1084 * Add the filesystem object to the directory. Note that neither
1085 * dip nor ip are referenced or locked, but their vnodes are
1086 * referenced. This function will bump the inode's link count.
1088 error = hammer_ip_add_directory(&trans, dip,
1089 nch->ncp->nc_name, nch->ncp->nc_nlen,
1096 cache_setunresolved(nch);
1097 cache_setvp(nch, ap->a_vp);
1099 hammer_done_transaction(&trans);
1100 hammer_knote(ap->a_vp, NOTE_LINK);
1101 hammer_knote(ap->a_dvp, NOTE_WRITE);
1106 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1108 * The operating system has already ensured that the directory entry
1109 * does not exist and done all appropriate namespace locking.
1113 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
1115 struct hammer_transaction trans;
1116 struct hammer_inode *dip;
1117 struct hammer_inode *nip;
1118 struct nchandle *nch;
1122 dip = VTOI(ap->a_dvp);
1124 if (dip->flags & HAMMER_INODE_RO)
1126 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1130 * Create a transaction to cover the operations we perform.
1132 hammer_start_transaction(&trans, dip->hmp);
1133 ++hammer_stats_file_iopsw;
1136 * Create a new filesystem object of the requested type. The
1137 * returned inode will be referenced but not locked.
1139 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1142 hkprintf("hammer_mkdir error %d\n", error);
1143 hammer_done_transaction(&trans);
1148 * Add the new filesystem object to the directory. This will also
1149 * bump the inode's link count.
1151 error = hammer_ip_add_directory(&trans, dip,
1152 nch->ncp->nc_name, nch->ncp->nc_nlen,
1155 hkprintf("hammer_mkdir (add) error %d\n", error);
1161 hammer_rel_inode(nip, 0);
1164 error = hammer_get_vnode(nip, ap->a_vpp);
1165 hammer_rel_inode(nip, 0);
1167 cache_setunresolved(ap->a_nch);
1168 cache_setvp(ap->a_nch, *ap->a_vpp);
1171 hammer_done_transaction(&trans);
1173 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
1178 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1180 * The operating system has already ensured that the directory entry
1181 * does not exist and done all appropriate namespace locking.
1185 hammer_vop_nmknod(struct vop_nmknod_args *ap)
1187 struct hammer_transaction trans;
1188 struct hammer_inode *dip;
1189 struct hammer_inode *nip;
1190 struct nchandle *nch;
1194 dip = VTOI(ap->a_dvp);
1196 if (dip->flags & HAMMER_INODE_RO)
1198 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1202 * Create a transaction to cover the operations we perform.
1204 hammer_start_transaction(&trans, dip->hmp);
1205 ++hammer_stats_file_iopsw;
1208 * Create a new filesystem object of the requested type. The
1209 * returned inode will be referenced but not locked.
1211 * If mknod specifies a directory a pseudo-fs is created.
1213 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
1216 hammer_done_transaction(&trans);
1222 * Add the new filesystem object to the directory. This will also
1223 * bump the inode's link count.
1225 error = hammer_ip_add_directory(&trans, dip,
1226 nch->ncp->nc_name, nch->ncp->nc_nlen,
1233 hammer_rel_inode(nip, 0);
1236 error = hammer_get_vnode(nip, ap->a_vpp);
1237 hammer_rel_inode(nip, 0);
1239 cache_setunresolved(ap->a_nch);
1240 cache_setvp(ap->a_nch, *ap->a_vpp);
1243 hammer_done_transaction(&trans);
1245 hammer_knote(ap->a_dvp, NOTE_WRITE);
1250 * hammer_vop_open { vp, mode, cred, fp }
1254 hammer_vop_open(struct vop_open_args *ap)
1258 ++hammer_stats_file_iopsr;
1259 ip = VTOI(ap->a_vp);
1261 if ((ap->a_mode & FWRITE) && (ip->flags & HAMMER_INODE_RO))
1263 return(vop_stdopen(ap));
1267 * hammer_vop_print { vp }
1271 hammer_vop_print(struct vop_print_args *ap)
1277 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
1281 hammer_vop_readdir(struct vop_readdir_args *ap)
1283 struct hammer_transaction trans;
1284 struct hammer_cursor cursor;
1285 struct hammer_inode *ip;
1287 hammer_base_elm_t base;
1296 ++hammer_stats_file_iopsr;
1297 ip = VTOI(ap->a_vp);
1299 saveoff = uio->uio_offset;
1301 if (ap->a_ncookies) {
1302 ncookies = uio->uio_resid / 16 + 1;
1303 if (ncookies > 1024)
1305 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1313 hammer_simple_transaction(&trans, ip->hmp);
1316 * Handle artificial entries
1318 * It should be noted that the minimum value for a directory
1319 * hash key on-media is 0x0000000100000000, so we can use anything
1320 * less then that to represent our 'special' key space.
1324 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1328 cookies[cookie_index] = saveoff;
1331 if (cookie_index == ncookies)
1335 if (ip->ino_data.parent_obj_id) {
1336 r = vop_write_dirent(&error, uio,
1337 ip->ino_data.parent_obj_id,
1340 r = vop_write_dirent(&error, uio,
1341 ip->obj_id, DT_DIR, 2, "..");
1346 cookies[cookie_index] = saveoff;
1349 if (cookie_index == ncookies)
1354 * Key range (begin and end inclusive) to scan. Directory keys
1355 * directly translate to a 64 bit 'seek' position.
1357 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1358 cursor.key_beg.localization = ip->obj_localization +
1359 HAMMER_LOCALIZE_MISC;
1360 cursor.key_beg.obj_id = ip->obj_id;
1361 cursor.key_beg.create_tid = 0;
1362 cursor.key_beg.delete_tid = 0;
1363 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1364 cursor.key_beg.obj_type = 0;
1365 cursor.key_beg.key = saveoff;
1367 cursor.key_end = cursor.key_beg;
1368 cursor.key_end.key = HAMMER_MAX_KEY;
1369 cursor.asof = ip->obj_asof;
1370 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1372 error = hammer_ip_first(&cursor);
1374 while (error == 0) {
1375 error = hammer_ip_resolve_data(&cursor);
1378 base = &cursor.leaf->base;
1379 saveoff = base->key;
1380 KKASSERT(cursor.leaf->data_len > HAMMER_ENTRY_NAME_OFF);
1382 if (base->obj_id != ip->obj_id)
1383 panic("readdir: bad record at %p", cursor.node);
1386 * Convert pseudo-filesystems into softlinks
1388 dtype = hammer_get_dtype(cursor.leaf->base.obj_type);
1389 r = vop_write_dirent(
1390 &error, uio, cursor.data->entry.obj_id,
1392 cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF ,
1393 (void *)cursor.data->entry.name);
1398 cookies[cookie_index] = base->key;
1400 if (cookie_index == ncookies)
1402 error = hammer_ip_next(&cursor);
1404 hammer_done_cursor(&cursor);
1407 hammer_done_transaction(&trans);
1410 *ap->a_eofflag = (error == ENOENT);
1411 uio->uio_offset = saveoff;
1412 if (error && cookie_index == 0) {
1413 if (error == ENOENT)
1416 kfree(cookies, M_TEMP);
1417 *ap->a_ncookies = 0;
1418 *ap->a_cookies = NULL;
1421 if (error == ENOENT)
1424 *ap->a_ncookies = cookie_index;
1425 *ap->a_cookies = cookies;
1432 * hammer_vop_readlink { vp, uio, cred }
1436 hammer_vop_readlink(struct vop_readlink_args *ap)
1438 struct hammer_transaction trans;
1439 struct hammer_cursor cursor;
1440 struct hammer_inode *ip;
1442 u_int32_t localization;
1443 hammer_pseudofs_inmem_t pfsm;
1446 ip = VTOI(ap->a_vp);
1449 * Shortcut if the symlink data was stuffed into ino_data.
1451 * Also expand special "@@PFS%05d" softlinks (expansion only
1452 * occurs for non-historical (current) accesses made from the
1453 * primary filesystem).
1455 if (ip->ino_data.size <= HAMMER_INODE_BASESYMLEN) {
1459 ptr = ip->ino_data.ext.symlink;
1460 bytes = (int)ip->ino_data.size;
1462 ip->obj_asof == HAMMER_MAX_TID &&
1463 ip->obj_localization == 0 &&
1464 strncmp(ptr, "@@PFS", 5) == 0) {
1465 hammer_simple_transaction(&trans, ip->hmp);
1466 bcopy(ptr + 5, buf, 5);
1468 localization = strtoul(buf, NULL, 10) << 16;
1469 pfsm = hammer_load_pseudofs(&trans, localization,
1472 if (pfsm->pfsd.mirror_flags &
1473 HAMMER_PFSD_SLAVE) {
1474 /* vap->va_size == 26 */
1475 ksnprintf(buf, sizeof(buf),
1477 pfsm->pfsd.sync_end_tid,
1478 localization >> 16);
1480 /* vap->va_size == 10 */
1481 ksnprintf(buf, sizeof(buf),
1483 localization >> 16);
1485 ksnprintf(buf, sizeof(buf),
1488 localization >> 16);
1492 bytes = strlen(buf);
1495 hammer_rel_pseudofs(trans.hmp, pfsm);
1496 hammer_done_transaction(&trans);
1498 error = uiomove(ptr, bytes, ap->a_uio);
1505 hammer_simple_transaction(&trans, ip->hmp);
1506 ++hammer_stats_file_iopsr;
1507 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
1510 * Key range (begin and end inclusive) to scan. Directory keys
1511 * directly translate to a 64 bit 'seek' position.
1513 cursor.key_beg.localization = ip->obj_localization +
1514 HAMMER_LOCALIZE_MISC;
1515 cursor.key_beg.obj_id = ip->obj_id;
1516 cursor.key_beg.create_tid = 0;
1517 cursor.key_beg.delete_tid = 0;
1518 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1519 cursor.key_beg.obj_type = 0;
1520 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1521 cursor.asof = ip->obj_asof;
1522 cursor.flags |= HAMMER_CURSOR_ASOF;
1524 error = hammer_ip_lookup(&cursor);
1526 error = hammer_ip_resolve_data(&cursor);
1528 KKASSERT(cursor.leaf->data_len >=
1529 HAMMER_SYMLINK_NAME_OFF);
1530 error = uiomove(cursor.data->symlink.name,
1531 cursor.leaf->data_len -
1532 HAMMER_SYMLINK_NAME_OFF,
1536 hammer_done_cursor(&cursor);
1537 hammer_done_transaction(&trans);
1542 * hammer_vop_nremove { nch, dvp, cred }
1546 hammer_vop_nremove(struct vop_nremove_args *ap)
1548 struct hammer_transaction trans;
1549 struct hammer_inode *dip;
1552 dip = VTOI(ap->a_dvp);
1554 if (hammer_nohistory(dip) == 0 &&
1555 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1559 hammer_start_transaction(&trans, dip->hmp);
1560 ++hammer_stats_file_iopsw;
1561 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 0);
1562 hammer_done_transaction(&trans);
1564 hammer_knote(ap->a_dvp, NOTE_WRITE);
1569 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1573 hammer_vop_nrename(struct vop_nrename_args *ap)
1575 struct hammer_transaction trans;
1576 struct namecache *fncp;
1577 struct namecache *tncp;
1578 struct hammer_inode *fdip;
1579 struct hammer_inode *tdip;
1580 struct hammer_inode *ip;
1581 struct hammer_cursor cursor;
1583 u_int32_t max_iterations;
1586 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1588 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1591 fdip = VTOI(ap->a_fdvp);
1592 tdip = VTOI(ap->a_tdvp);
1593 fncp = ap->a_fnch->ncp;
1594 tncp = ap->a_tnch->ncp;
1595 ip = VTOI(fncp->nc_vp);
1596 KKASSERT(ip != NULL);
1598 if (fdip->obj_localization != tdip->obj_localization)
1600 if (fdip->obj_localization != ip->obj_localization)
1603 if (fdip->flags & HAMMER_INODE_RO)
1605 if (tdip->flags & HAMMER_INODE_RO)
1607 if (ip->flags & HAMMER_INODE_RO)
1609 if ((error = hammer_checkspace(fdip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
1612 hammer_start_transaction(&trans, fdip->hmp);
1613 ++hammer_stats_file_iopsw;
1616 * Remove tncp from the target directory and then link ip as
1617 * tncp. XXX pass trans to dounlink
1619 * Force the inode sync-time to match the transaction so it is
1620 * in-sync with the creation of the target directory entry.
1622 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp,
1624 if (error == 0 || error == ENOENT) {
1625 error = hammer_ip_add_directory(&trans, tdip,
1626 tncp->nc_name, tncp->nc_nlen,
1629 ip->ino_data.parent_obj_id = tdip->obj_id;
1630 ip->ino_data.ctime = trans.time;
1631 hammer_modify_inode(ip, HAMMER_INODE_DDIRTY);
1635 goto failed; /* XXX */
1638 * Locate the record in the originating directory and remove it.
1640 * Calculate the namekey and setup the key range for the scan. This
1641 * works kinda like a chained hash table where the lower 32 bits
1642 * of the namekey synthesize the chain.
1644 * The key range is inclusive of both key_beg and key_end.
1646 namekey = hammer_directory_namekey(fdip, fncp->nc_name, fncp->nc_nlen,
1649 hammer_init_cursor(&trans, &cursor, &fdip->cache[1], fdip);
1650 cursor.key_beg.localization = fdip->obj_localization +
1651 HAMMER_LOCALIZE_MISC;
1652 cursor.key_beg.obj_id = fdip->obj_id;
1653 cursor.key_beg.key = namekey;
1654 cursor.key_beg.create_tid = 0;
1655 cursor.key_beg.delete_tid = 0;
1656 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1657 cursor.key_beg.obj_type = 0;
1659 cursor.key_end = cursor.key_beg;
1660 cursor.key_end.key += max_iterations;
1661 cursor.asof = fdip->obj_asof;
1662 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1665 * Scan all matching records (the chain), locate the one matching
1666 * the requested path component.
1668 * The hammer_ip_*() functions merge in-memory records with on-disk
1669 * records for the purposes of the search.
1671 error = hammer_ip_first(&cursor);
1672 while (error == 0) {
1673 if (hammer_ip_resolve_data(&cursor) != 0)
1675 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
1677 if (fncp->nc_nlen == nlen &&
1678 bcmp(fncp->nc_name, cursor.data->entry.name, nlen) == 0) {
1681 error = hammer_ip_next(&cursor);
1685 * If all is ok we have to get the inode so we can adjust nlinks.
1687 * WARNING: hammer_ip_del_directory() may have to terminate the
1688 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
1692 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1695 * XXX A deadlock here will break rename's atomicy for the purposes
1696 * of crash recovery.
1698 if (error == EDEADLK) {
1699 hammer_done_cursor(&cursor);
1704 * Cleanup and tell the kernel that the rename succeeded.
1706 hammer_done_cursor(&cursor);
1708 cache_rename(ap->a_fnch, ap->a_tnch);
1709 hammer_knote(ap->a_fdvp, NOTE_WRITE);
1710 hammer_knote(ap->a_tdvp, NOTE_WRITE);
1712 hammer_knote(ip->vp, NOTE_RENAME);
1716 hammer_done_transaction(&trans);
1721 * hammer_vop_nrmdir { nch, dvp, cred }
1725 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1727 struct hammer_transaction trans;
1728 struct hammer_inode *dip;
1731 dip = VTOI(ap->a_dvp);
1733 if (hammer_nohistory(dip) == 0 &&
1734 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1738 hammer_start_transaction(&trans, dip->hmp);
1739 ++hammer_stats_file_iopsw;
1740 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 1);
1741 hammer_done_transaction(&trans);
1743 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
1748 * hammer_vop_markatime { vp, cred }
1752 hammer_vop_markatime(struct vop_markatime_args *ap)
1754 struct hammer_transaction trans;
1755 struct hammer_inode *ip;
1757 ip = VTOI(ap->a_vp);
1758 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1760 if (ip->flags & HAMMER_INODE_RO)
1762 if (ip->hmp->mp->mnt_flag & MNT_NOATIME)
1764 hammer_start_transaction(&trans, ip->hmp);
1765 ++hammer_stats_file_iopsw;
1767 ip->ino_data.atime = trans.time;
1768 hammer_modify_inode(ip, HAMMER_INODE_ATIME);
1769 hammer_done_transaction(&trans);
1770 hammer_knote(ap->a_vp, NOTE_ATTRIB);
1775 * hammer_vop_setattr { vp, vap, cred }
1779 hammer_vop_setattr(struct vop_setattr_args *ap)
1781 struct hammer_transaction trans;
1783 struct hammer_inode *ip;
1789 int64_t aligned_size;
1793 ip = ap->a_vp->v_data;
1797 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1799 if (ip->flags & HAMMER_INODE_RO)
1801 if (hammer_nohistory(ip) == 0 &&
1802 (error = hammer_checkspace(ip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
1806 hammer_start_transaction(&trans, ip->hmp);
1807 ++hammer_stats_file_iopsw;
1810 if (vap->va_flags != VNOVAL) {
1811 flags = ip->ino_data.uflags;
1812 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1813 hammer_to_unix_xid(&ip->ino_data.uid),
1816 if (ip->ino_data.uflags != flags) {
1817 ip->ino_data.uflags = flags;
1818 ip->ino_data.ctime = trans.time;
1819 modflags |= HAMMER_INODE_DDIRTY;
1820 kflags |= NOTE_ATTRIB;
1822 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1829 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1833 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
1834 mode_t cur_mode = ip->ino_data.mode;
1835 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1836 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1840 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
1842 &cur_uid, &cur_gid, &cur_mode);
1844 hammer_guid_to_uuid(&uuid_uid, cur_uid);
1845 hammer_guid_to_uuid(&uuid_gid, cur_gid);
1846 if (bcmp(&uuid_uid, &ip->ino_data.uid,
1847 sizeof(uuid_uid)) ||
1848 bcmp(&uuid_gid, &ip->ino_data.gid,
1849 sizeof(uuid_gid)) ||
1850 ip->ino_data.mode != cur_mode
1852 ip->ino_data.uid = uuid_uid;
1853 ip->ino_data.gid = uuid_gid;
1854 ip->ino_data.mode = cur_mode;
1855 ip->ino_data.ctime = trans.time;
1856 modflags |= HAMMER_INODE_DDIRTY;
1858 kflags |= NOTE_ATTRIB;
1861 while (vap->va_size != VNOVAL && ip->ino_data.size != vap->va_size) {
1862 switch(ap->a_vp->v_type) {
1864 if (vap->va_size == ip->ino_data.size)
1867 * XXX break atomicy, we can deadlock the backend
1868 * if we do not release the lock. Probably not a
1871 blksize = hammer_blocksize(vap->va_size);
1872 if (vap->va_size < ip->ino_data.size) {
1873 vtruncbuf(ap->a_vp, vap->va_size, blksize);
1875 kflags |= NOTE_WRITE;
1877 vnode_pager_setsize(ap->a_vp, vap->va_size);
1879 kflags |= NOTE_WRITE | NOTE_EXTEND;
1881 ip->ino_data.size = vap->va_size;
1882 ip->ino_data.mtime = trans.time;
1883 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
1886 * on-media truncation is cached in the inode until
1887 * the inode is synchronized.
1890 hammer_ip_frontend_trunc(ip, vap->va_size);
1891 #ifdef DEBUG_TRUNCATE
1892 if (HammerTruncIp == NULL)
1895 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1896 ip->flags |= HAMMER_INODE_TRUNCATED;
1897 ip->trunc_off = vap->va_size;
1898 #ifdef DEBUG_TRUNCATE
1899 if (ip == HammerTruncIp)
1900 kprintf("truncate1 %016llx\n", ip->trunc_off);
1902 } else if (ip->trunc_off > vap->va_size) {
1903 ip->trunc_off = vap->va_size;
1904 #ifdef DEBUG_TRUNCATE
1905 if (ip == HammerTruncIp)
1906 kprintf("truncate2 %016llx\n", ip->trunc_off);
1909 #ifdef DEBUG_TRUNCATE
1910 if (ip == HammerTruncIp)
1911 kprintf("truncate3 %016llx (ignored)\n", vap->va_size);
1917 * If truncating we have to clean out a portion of
1918 * the last block on-disk. We do this in the
1919 * front-end buffer cache.
1921 aligned_size = (vap->va_size + (blksize - 1)) &
1922 ~(int64_t)(blksize - 1);
1923 if (truncating && vap->va_size < aligned_size) {
1927 aligned_size -= blksize;
1929 offset = (int)vap->va_size & (blksize - 1);
1930 error = bread(ap->a_vp, aligned_size,
1932 hammer_ip_frontend_trunc(ip, aligned_size);
1934 bzero(bp->b_data + offset,
1936 /* must de-cache direct-io offset */
1937 bp->b_bio2.bio_offset = NOOFFSET;
1940 kprintf("ERROR %d\n", error);
1946 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1947 ip->flags |= HAMMER_INODE_TRUNCATED;
1948 ip->trunc_off = vap->va_size;
1949 } else if (ip->trunc_off > vap->va_size) {
1950 ip->trunc_off = vap->va_size;
1952 hammer_ip_frontend_trunc(ip, vap->va_size);
1953 ip->ino_data.size = vap->va_size;
1954 ip->ino_data.mtime = trans.time;
1955 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
1956 kflags |= NOTE_ATTRIB;
1964 if (vap->va_atime.tv_sec != VNOVAL) {
1965 ip->ino_data.atime = hammer_timespec_to_time(&vap->va_atime);
1966 modflags |= HAMMER_INODE_ATIME;
1967 kflags |= NOTE_ATTRIB;
1969 if (vap->va_mtime.tv_sec != VNOVAL) {
1970 ip->ino_data.mtime = hammer_timespec_to_time(&vap->va_mtime);
1971 modflags |= HAMMER_INODE_MTIME;
1972 kflags |= NOTE_ATTRIB;
1974 if (vap->va_mode != (mode_t)VNOVAL) {
1975 mode_t cur_mode = ip->ino_data.mode;
1976 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1977 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1979 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
1980 cur_uid, cur_gid, &cur_mode);
1981 if (error == 0 && ip->ino_data.mode != cur_mode) {
1982 ip->ino_data.mode = cur_mode;
1983 ip->ino_data.ctime = trans.time;
1984 modflags |= HAMMER_INODE_DDIRTY;
1985 kflags |= NOTE_ATTRIB;
1990 hammer_modify_inode(ip, modflags);
1991 hammer_done_transaction(&trans);
1992 hammer_knote(ap->a_vp, kflags);
1997 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
2001 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
2003 struct hammer_transaction trans;
2004 struct hammer_inode *dip;
2005 struct hammer_inode *nip;
2006 struct nchandle *nch;
2007 hammer_record_t record;
2011 ap->a_vap->va_type = VLNK;
2014 dip = VTOI(ap->a_dvp);
2016 if (dip->flags & HAMMER_INODE_RO)
2018 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
2022 * Create a transaction to cover the operations we perform.
2024 hammer_start_transaction(&trans, dip->hmp);
2025 ++hammer_stats_file_iopsw;
2028 * Create a new filesystem object of the requested type. The
2029 * returned inode will be referenced but not locked.
2032 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
2035 hammer_done_transaction(&trans);
2041 * Add a record representing the symlink. symlink stores the link
2042 * as pure data, not a string, and is no \0 terminated.
2045 bytes = strlen(ap->a_target);
2047 if (bytes <= HAMMER_INODE_BASESYMLEN) {
2048 bcopy(ap->a_target, nip->ino_data.ext.symlink, bytes);
2050 record = hammer_alloc_mem_record(nip, bytes);
2051 record->type = HAMMER_MEM_RECORD_GENERAL;
2053 record->leaf.base.localization = nip->obj_localization +
2054 HAMMER_LOCALIZE_MISC;
2055 record->leaf.base.key = HAMMER_FIXKEY_SYMLINK;
2056 record->leaf.base.rec_type = HAMMER_RECTYPE_FIX;
2057 record->leaf.data_len = bytes;
2058 KKASSERT(HAMMER_SYMLINK_NAME_OFF == 0);
2059 bcopy(ap->a_target, record->data->symlink.name, bytes);
2060 error = hammer_ip_add_record(&trans, record);
2064 * Set the file size to the length of the link.
2067 nip->ino_data.size = bytes;
2068 hammer_modify_inode(nip, HAMMER_INODE_DDIRTY);
2072 error = hammer_ip_add_directory(&trans, dip, nch->ncp->nc_name,
2073 nch->ncp->nc_nlen, nip);
2079 hammer_rel_inode(nip, 0);
2082 error = hammer_get_vnode(nip, ap->a_vpp);
2083 hammer_rel_inode(nip, 0);
2085 cache_setunresolved(ap->a_nch);
2086 cache_setvp(ap->a_nch, *ap->a_vpp);
2087 hammer_knote(ap->a_dvp, NOTE_WRITE);
2090 hammer_done_transaction(&trans);
2095 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
2099 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
2101 struct hammer_transaction trans;
2102 struct hammer_inode *dip;
2105 dip = VTOI(ap->a_dvp);
2107 if (hammer_nohistory(dip) == 0 &&
2108 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0) {
2112 hammer_start_transaction(&trans, dip->hmp);
2113 ++hammer_stats_file_iopsw;
2114 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
2115 ap->a_cred, ap->a_flags, -1);
2116 hammer_done_transaction(&trans);
2122 * hammer_vop_ioctl { vp, command, data, fflag, cred }
2126 hammer_vop_ioctl(struct vop_ioctl_args *ap)
2128 struct hammer_inode *ip = ap->a_vp->v_data;
2130 ++hammer_stats_file_iopsr;
2131 return(hammer_ioctl(ip, ap->a_command, ap->a_data,
2132 ap->a_fflag, ap->a_cred));
2137 hammer_vop_mountctl(struct vop_mountctl_args *ap)
2142 mp = ap->a_head.a_ops->head.vv_mount;
2145 case MOUNTCTL_SET_EXPORT:
2146 if (ap->a_ctllen != sizeof(struct export_args))
2149 error = hammer_vfs_export(mp, ap->a_op,
2150 (const struct export_args *)ap->a_ctl);
2153 error = journal_mountctl(ap);
2160 * hammer_vop_strategy { vp, bio }
2162 * Strategy call, used for regular file read & write only. Note that the
2163 * bp may represent a cluster.
2165 * To simplify operation and allow better optimizations in the future,
2166 * this code does not make any assumptions with regards to buffer alignment
2171 hammer_vop_strategy(struct vop_strategy_args *ap)
2176 bp = ap->a_bio->bio_buf;
2180 error = hammer_vop_strategy_read(ap);
2183 error = hammer_vop_strategy_write(ap);
2186 bp->b_error = error = EINVAL;
2187 bp->b_flags |= B_ERROR;
2195 * Read from a regular file. Iterate the related records and fill in the
2196 * BIO/BUF. Gaps are zero-filled.
2198 * The support code in hammer_object.c should be used to deal with mixed
2199 * in-memory and on-disk records.
2201 * NOTE: Can be called from the cluster code with an oversized buf.
2207 hammer_vop_strategy_read(struct vop_strategy_args *ap)
2209 struct hammer_transaction trans;
2210 struct hammer_inode *ip;
2211 struct hammer_cursor cursor;
2212 hammer_base_elm_t base;
2213 hammer_off_t disk_offset;
2227 ip = ap->a_vp->v_data;
2230 * The zone-2 disk offset may have been set by the cluster code via
2231 * a BMAP operation, or else should be NOOFFSET.
2233 * Checking the high bits for a match against zone-2 should suffice.
2235 nbio = push_bio(bio);
2236 if ((nbio->bio_offset & HAMMER_OFF_ZONE_MASK) ==
2237 HAMMER_ZONE_LARGE_DATA) {
2238 error = hammer_io_direct_read(ip->hmp, nbio, NULL);
2243 * Well, that sucked. Do it the hard way. If all the stars are
2244 * aligned we may still be able to issue a direct-read.
2246 hammer_simple_transaction(&trans, ip->hmp);
2247 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2250 * Key range (begin and end inclusive) to scan. Note that the key's
2251 * stored in the actual records represent BASE+LEN, not BASE. The
2252 * first record containing bio_offset will have a key > bio_offset.
2254 cursor.key_beg.localization = ip->obj_localization +
2255 HAMMER_LOCALIZE_MISC;
2256 cursor.key_beg.obj_id = ip->obj_id;
2257 cursor.key_beg.create_tid = 0;
2258 cursor.key_beg.delete_tid = 0;
2259 cursor.key_beg.obj_type = 0;
2260 cursor.key_beg.key = bio->bio_offset + 1;
2261 cursor.asof = ip->obj_asof;
2262 cursor.flags |= HAMMER_CURSOR_ASOF;
2264 cursor.key_end = cursor.key_beg;
2265 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2267 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_DBFILE) {
2268 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
2269 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
2270 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2274 ran_end = bio->bio_offset + bp->b_bufsize;
2275 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2276 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2277 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2278 if (tmp64 < ran_end)
2279 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2281 cursor.key_end.key = ran_end + MAXPHYS + 1;
2283 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2285 error = hammer_ip_first(&cursor);
2288 while (error == 0) {
2290 * Get the base file offset of the record. The key for
2291 * data records is (base + bytes) rather then (base).
2293 base = &cursor.leaf->base;
2294 rec_offset = base->key - cursor.leaf->data_len;
2297 * Calculate the gap, if any, and zero-fill it.
2299 * n is the offset of the start of the record verses our
2300 * current seek offset in the bio.
2302 n = (int)(rec_offset - (bio->bio_offset + boff));
2304 if (n > bp->b_bufsize - boff)
2305 n = bp->b_bufsize - boff;
2306 bzero((char *)bp->b_data + boff, n);
2312 * Calculate the data offset in the record and the number
2313 * of bytes we can copy.
2315 * There are two degenerate cases. First, boff may already
2316 * be at bp->b_bufsize. Secondly, the data offset within
2317 * the record may exceed the record's size.
2321 n = cursor.leaf->data_len - roff;
2323 kprintf("strategy_read: bad n=%d roff=%d\n", n, roff);
2325 } else if (n > bp->b_bufsize - boff) {
2326 n = bp->b_bufsize - boff;
2330 * Deal with cached truncations. This cool bit of code
2331 * allows truncate()/ftruncate() to avoid having to sync
2334 * If the frontend is truncated then all backend records are
2335 * subject to the frontend's truncation.
2337 * If the backend is truncated then backend records on-disk
2338 * (but not in-memory) are subject to the backend's
2339 * truncation. In-memory records owned by the backend
2340 * represent data written after the truncation point on the
2341 * backend and must not be truncated.
2343 * Truncate operations deal with frontend buffer cache
2344 * buffers and frontend-owned in-memory records synchronously.
2346 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2347 if (hammer_cursor_ondisk(&cursor) ||
2348 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2349 if (ip->trunc_off <= rec_offset)
2351 else if (ip->trunc_off < rec_offset + n)
2352 n = (int)(ip->trunc_off - rec_offset);
2355 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2356 if (hammer_cursor_ondisk(&cursor)) {
2357 if (ip->sync_trunc_off <= rec_offset)
2359 else if (ip->sync_trunc_off < rec_offset + n)
2360 n = (int)(ip->sync_trunc_off - rec_offset);
2365 * Try to issue a direct read into our bio if possible,
2366 * otherwise resolve the element data into a hammer_buffer
2369 * The buffer on-disk should be zerod past any real
2370 * truncation point, but may not be for any synthesized
2371 * truncation point from above.
2373 disk_offset = cursor.leaf->data_offset + roff;
2374 if (boff == 0 && n == bp->b_bufsize &&
2375 hammer_cursor_ondisk(&cursor) &&
2376 (disk_offset & HAMMER_BUFMASK) == 0) {
2377 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2378 HAMMER_ZONE_LARGE_DATA);
2379 nbio->bio_offset = disk_offset;
2380 error = hammer_io_direct_read(trans.hmp, nbio,
2384 error = hammer_ip_resolve_data(&cursor);
2386 bcopy((char *)cursor.data + roff,
2387 (char *)bp->b_data + boff, n);
2394 * Iterate until we have filled the request.
2397 if (boff == bp->b_bufsize)
2399 error = hammer_ip_next(&cursor);
2403 * There may have been a gap after the last record
2405 if (error == ENOENT)
2407 if (error == 0 && boff != bp->b_bufsize) {
2408 KKASSERT(boff < bp->b_bufsize);
2409 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
2410 /* boff = bp->b_bufsize; */
2413 bp->b_error = error;
2415 bp->b_flags |= B_ERROR;
2420 hammer_cache_node(&ip->cache[1], cursor.node);
2421 hammer_done_cursor(&cursor);
2422 hammer_done_transaction(&trans);
2427 * BMAP operation - used to support cluster_read() only.
2429 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
2431 * This routine may return EOPNOTSUPP if the opration is not supported for
2432 * the specified offset. The contents of the pointer arguments do not
2433 * need to be initialized in that case.
2435 * If a disk address is available and properly aligned return 0 with
2436 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
2437 * to the run-length relative to that offset. Callers may assume that
2438 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
2439 * large, so return EOPNOTSUPP if it is not sufficiently large.
2443 hammer_vop_bmap(struct vop_bmap_args *ap)
2445 struct hammer_transaction trans;
2446 struct hammer_inode *ip;
2447 struct hammer_cursor cursor;
2448 hammer_base_elm_t base;
2452 int64_t base_offset;
2453 int64_t base_disk_offset;
2454 int64_t last_offset;
2455 hammer_off_t last_disk_offset;
2456 hammer_off_t disk_offset;
2461 ++hammer_stats_file_iopsr;
2462 ip = ap->a_vp->v_data;
2465 * We can only BMAP regular files. We can't BMAP database files,
2468 if (ip->ino_data.obj_type != HAMMER_OBJTYPE_REGFILE)
2472 * bmap is typically called with runp/runb both NULL when used
2473 * for writing. We do not support BMAP for writing atm.
2475 if (ap->a_cmd != BUF_CMD_READ)
2479 * Scan the B-Tree to acquire blockmap addresses, then translate
2482 hammer_simple_transaction(&trans, ip->hmp);
2484 kprintf("bmap_beg %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2486 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2489 * Key range (begin and end inclusive) to scan. Note that the key's
2490 * stored in the actual records represent BASE+LEN, not BASE. The
2491 * first record containing bio_offset will have a key > bio_offset.
2493 cursor.key_beg.localization = ip->obj_localization +
2494 HAMMER_LOCALIZE_MISC;
2495 cursor.key_beg.obj_id = ip->obj_id;
2496 cursor.key_beg.create_tid = 0;
2497 cursor.key_beg.delete_tid = 0;
2498 cursor.key_beg.obj_type = 0;
2500 cursor.key_beg.key = ap->a_loffset - MAXPHYS + 1;
2502 cursor.key_beg.key = ap->a_loffset + 1;
2503 if (cursor.key_beg.key < 0)
2504 cursor.key_beg.key = 0;
2505 cursor.asof = ip->obj_asof;
2506 cursor.flags |= HAMMER_CURSOR_ASOF;
2508 cursor.key_end = cursor.key_beg;
2509 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2511 ran_end = ap->a_loffset + MAXPHYS;
2512 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2513 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2514 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2515 if (tmp64 < ran_end)
2516 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2518 cursor.key_end.key = ran_end + MAXPHYS + 1;
2520 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2522 error = hammer_ip_first(&cursor);
2523 base_offset = last_offset = 0;
2524 base_disk_offset = last_disk_offset = 0;
2526 while (error == 0) {
2528 * Get the base file offset of the record. The key for
2529 * data records is (base + bytes) rather then (base).
2531 * NOTE: rec_offset + rec_len may exceed the end-of-file.
2532 * The extra bytes should be zero on-disk and the BMAP op
2533 * should still be ok.
2535 base = &cursor.leaf->base;
2536 rec_offset = base->key - cursor.leaf->data_len;
2537 rec_len = cursor.leaf->data_len;
2540 * Incorporate any cached truncation.
2542 * NOTE: Modifications to rec_len based on synthesized
2543 * truncation points remove the guarantee that any extended
2544 * data on disk is zero (since the truncations may not have
2545 * taken place on-media yet).
2547 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2548 if (hammer_cursor_ondisk(&cursor) ||
2549 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2550 if (ip->trunc_off <= rec_offset)
2552 else if (ip->trunc_off < rec_offset + rec_len)
2553 rec_len = (int)(ip->trunc_off - rec_offset);
2556 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2557 if (hammer_cursor_ondisk(&cursor)) {
2558 if (ip->sync_trunc_off <= rec_offset)
2560 else if (ip->sync_trunc_off < rec_offset + rec_len)
2561 rec_len = (int)(ip->sync_trunc_off - rec_offset);
2566 * Accumulate information. If we have hit a discontiguous
2567 * block reset base_offset unless we are already beyond the
2568 * requested offset. If we are, that's it, we stop.
2572 if (hammer_cursor_ondisk(&cursor)) {
2573 disk_offset = cursor.leaf->data_offset;
2574 if (rec_offset != last_offset ||
2575 disk_offset != last_disk_offset) {
2576 if (rec_offset > ap->a_loffset)
2578 base_offset = rec_offset;
2579 base_disk_offset = disk_offset;
2581 last_offset = rec_offset + rec_len;
2582 last_disk_offset = disk_offset + rec_len;
2584 error = hammer_ip_next(&cursor);
2588 kprintf("BMAP %016llx: %016llx - %016llx\n",
2589 ap->a_loffset, base_offset, last_offset);
2590 kprintf("BMAP %16s: %016llx - %016llx\n",
2591 "", base_disk_offset, last_disk_offset);
2595 hammer_cache_node(&ip->cache[1], cursor.node);
2597 kprintf("bmap_end2 %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2600 hammer_done_cursor(&cursor);
2601 hammer_done_transaction(&trans);
2604 * If we couldn't find any records or the records we did find were
2605 * all behind the requested offset, return failure. A forward
2606 * truncation can leave a hole w/ no on-disk records.
2608 if (last_offset == 0 || last_offset < ap->a_loffset)
2609 return (EOPNOTSUPP);
2612 * Figure out the block size at the requested offset and adjust
2613 * our limits so the cluster_read() does not create inappropriately
2614 * sized buffer cache buffers.
2616 blksize = hammer_blocksize(ap->a_loffset);
2617 if (hammer_blocksize(base_offset) != blksize) {
2618 base_offset = hammer_blockdemarc(base_offset, ap->a_loffset);
2620 if (last_offset != ap->a_loffset &&
2621 hammer_blocksize(last_offset - 1) != blksize) {
2622 last_offset = hammer_blockdemarc(ap->a_loffset,
2627 * Returning EOPNOTSUPP simply prevents the direct-IO optimization
2630 disk_offset = base_disk_offset + (ap->a_loffset - base_offset);
2632 if ((disk_offset & HAMMER_OFF_ZONE_MASK) != HAMMER_ZONE_LARGE_DATA) {
2634 * Only large-data zones can be direct-IOd
2637 } else if ((disk_offset & HAMMER_BUFMASK) ||
2638 (last_offset - ap->a_loffset) < blksize) {
2640 * doffsetp is not aligned or the forward run size does
2641 * not cover a whole buffer, disallow the direct I/O.
2648 *ap->a_doffsetp = disk_offset;
2650 *ap->a_runb = ap->a_loffset - base_offset;
2651 KKASSERT(*ap->a_runb >= 0);
2654 *ap->a_runp = last_offset - ap->a_loffset;
2655 KKASSERT(*ap->a_runp >= 0);
2663 * Write to a regular file. Because this is a strategy call the OS is
2664 * trying to actually get data onto the media.
2668 hammer_vop_strategy_write(struct vop_strategy_args *ap)
2670 hammer_record_t record;
2681 ip = ap->a_vp->v_data;
2684 blksize = hammer_blocksize(bio->bio_offset);
2685 KKASSERT(bp->b_bufsize == blksize);
2687 if (ip->flags & HAMMER_INODE_RO) {
2688 bp->b_error = EROFS;
2689 bp->b_flags |= B_ERROR;
2695 * Interlock with inode destruction (no in-kernel or directory
2696 * topology visibility). If we queue new IO while trying to
2697 * destroy the inode we can deadlock the vtrunc call in
2698 * hammer_inode_unloadable_check().
2700 * Besides, there's no point flushing a bp associated with an
2701 * inode that is being destroyed on-media and has no kernel
2704 if ((ip->flags | ip->sync_flags) &
2705 (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) {
2712 * Reserve space and issue a direct-write from the front-end.
2713 * NOTE: The direct_io code will hammer_bread/bcopy smaller
2716 * An in-memory record will be installed to reference the storage
2717 * until the flusher can get to it.
2719 * Since we own the high level bio the front-end will not try to
2720 * do a direct-read until the write completes.
2722 * NOTE: The only time we do not reserve a full-sized buffers
2723 * worth of data is if the file is small. We do not try to
2724 * allocate a fragment (from the small-data zone) at the end of
2725 * an otherwise large file as this can lead to wildly separated
2728 KKASSERT((bio->bio_offset & HAMMER_BUFMASK) == 0);
2729 KKASSERT(bio->bio_offset < ip->ino_data.size);
2730 if (bio->bio_offset || ip->ino_data.size > HAMMER_BUFSIZE / 2)
2731 bytes = bp->b_bufsize;
2733 bytes = ((int)ip->ino_data.size + 15) & ~15;
2735 record = hammer_ip_add_bulk(ip, bio->bio_offset, bp->b_data,
2738 hammer_io_direct_write(hmp, record, bio);
2739 if (ip->rsv_recs > 1 && hmp->rsv_recs > hammer_limit_recs)
2740 hammer_flush_inode(ip, 0);
2742 bp->b_bio2.bio_offset = NOOFFSET;
2743 bp->b_error = error;
2744 bp->b_flags |= B_ERROR;
2751 * dounlink - disconnect a directory entry
2753 * XXX whiteout support not really in yet
2756 hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
2757 struct vnode *dvp, struct ucred *cred,
2758 int flags, int isdir)
2760 struct namecache *ncp;
2763 struct hammer_cursor cursor;
2765 u_int32_t max_iterations;
2769 * Calculate the namekey and setup the key range for the scan. This
2770 * works kinda like a chained hash table where the lower 32 bits
2771 * of the namekey synthesize the chain.
2773 * The key range is inclusive of both key_beg and key_end.
2778 if (dip->flags & HAMMER_INODE_RO)
2781 namekey = hammer_directory_namekey(dip, ncp->nc_name, ncp->nc_nlen,
2784 hammer_init_cursor(trans, &cursor, &dip->cache[1], dip);
2785 cursor.key_beg.localization = dip->obj_localization +
2786 HAMMER_LOCALIZE_MISC;
2787 cursor.key_beg.obj_id = dip->obj_id;
2788 cursor.key_beg.key = namekey;
2789 cursor.key_beg.create_tid = 0;
2790 cursor.key_beg.delete_tid = 0;
2791 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2792 cursor.key_beg.obj_type = 0;
2794 cursor.key_end = cursor.key_beg;
2795 cursor.key_end.key += max_iterations;
2796 cursor.asof = dip->obj_asof;
2797 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
2800 * Scan all matching records (the chain), locate the one matching
2801 * the requested path component. info->last_error contains the
2802 * error code on search termination and could be 0, ENOENT, or
2805 * The hammer_ip_*() functions merge in-memory records with on-disk
2806 * records for the purposes of the search.
2808 error = hammer_ip_first(&cursor);
2810 while (error == 0) {
2811 error = hammer_ip_resolve_data(&cursor);
2814 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
2816 if (ncp->nc_nlen == nlen &&
2817 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
2820 error = hammer_ip_next(&cursor);
2824 * If all is ok we have to get the inode so we can adjust nlinks.
2825 * To avoid a deadlock with the flusher we must release the inode
2826 * lock on the directory when acquiring the inode for the entry.
2828 * If the target is a directory, it must be empty.
2831 hammer_unlock(&cursor.ip->lock);
2832 ip = hammer_get_inode(trans, dip, cursor.data->entry.obj_id,
2834 cursor.data->entry.localization,
2836 hammer_lock_sh(&cursor.ip->lock);
2837 if (error == ENOENT) {
2838 kprintf("HAMMER: WARNING: Removing "
2839 "dirent w/missing inode \"%s\"\n"
2840 "\tobj_id = %016llx\n",
2842 (long long)cursor.data->entry.obj_id);
2847 * If isdir >= 0 we validate that the entry is or is not a
2848 * directory. If isdir < 0 we don't care.
2850 if (error == 0 && isdir >= 0 && ip) {
2852 ip->ino_data.obj_type != HAMMER_OBJTYPE_DIRECTORY) {
2854 } else if (isdir == 0 &&
2855 ip->ino_data.obj_type == HAMMER_OBJTYPE_DIRECTORY) {
2861 * If we are trying to remove a directory the directory must
2864 * The check directory code can loop and deadlock/retry. Our
2865 * own cursor's node locks must be released to avoid a 3-way
2866 * deadlock with the flusher if the check directory code
2869 * If any changes whatsoever have been made to the cursor
2870 * set EDEADLK and retry.
2872 if (error == 0 && ip && ip->ino_data.obj_type ==
2873 HAMMER_OBJTYPE_DIRECTORY) {
2874 hammer_unlock_cursor(&cursor);
2875 error = hammer_ip_check_directory_empty(trans, ip);
2876 hammer_lock_cursor(&cursor);
2877 if (cursor.flags & HAMMER_CURSOR_RETEST) {
2878 kprintf("HAMMER: Warning: avoided deadlock "
2886 * Delete the directory entry.
2888 * WARNING: hammer_ip_del_directory() may have to terminate
2889 * the cursor to avoid a deadlock. It is ok to call
2890 * hammer_done_cursor() twice.
2893 error = hammer_ip_del_directory(trans, &cursor,
2896 hammer_done_cursor(&cursor);
2898 cache_setunresolved(nch);
2899 cache_setvp(nch, NULL);
2902 hammer_knote(ip->vp, NOTE_DELETE);
2903 cache_inval_vp(ip->vp, CINV_DESTROY);
2907 hammer_rel_inode(ip, 0);
2909 hammer_done_cursor(&cursor);
2911 if (error == EDEADLK)
2917 /************************************************************************
2918 * FIFO AND SPECFS OPS *
2919 ************************************************************************
2924 hammer_vop_fifoclose (struct vop_close_args *ap)
2926 /* XXX update itimes */
2927 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
2931 hammer_vop_fiforead (struct vop_read_args *ap)
2935 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2936 /* XXX update access time */
2941 hammer_vop_fifowrite (struct vop_write_args *ap)
2945 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2946 /* XXX update access time */
2952 hammer_vop_fifokqfilter(struct vop_kqfilter_args *ap)
2956 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2958 error = hammer_vop_kqfilter(ap);
2963 hammer_vop_specclose (struct vop_close_args *ap)
2965 /* XXX update itimes */
2966 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2970 hammer_vop_specread (struct vop_read_args *ap)
2972 /* XXX update access time */
2973 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2977 hammer_vop_specwrite (struct vop_write_args *ap)
2979 /* XXX update last change time */
2980 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2984 * SPECFS's getattr will override fields as necessary, but does not fill
2985 * stuff in from scratch.
2989 hammer_vop_specgetattr (struct vop_getattr_args *ap)
2993 error = hammer_vop_getattr(ap);
2995 VOCALL(&spec_vnode_vops, &ap->a_head);
3000 /************************************************************************
3002 ************************************************************************
3005 static void filt_hammerdetach(struct knote *kn);
3006 static int filt_hammerread(struct knote *kn, long hint);
3007 static int filt_hammerwrite(struct knote *kn, long hint);
3008 static int filt_hammervnode(struct knote *kn, long hint);
3010 static struct filterops hammerread_filtops =
3011 { 1, NULL, filt_hammerdetach, filt_hammerread };
3012 static struct filterops hammerwrite_filtops =
3013 { 1, NULL, filt_hammerdetach, filt_hammerwrite };
3014 static struct filterops hammervnode_filtops =
3015 { 1, NULL, filt_hammerdetach, filt_hammervnode };
3019 hammer_vop_kqfilter(struct vop_kqfilter_args *ap)
3021 struct vnode *vp = ap->a_vp;
3022 struct knote *kn = ap->a_kn;
3025 switch (kn->kn_filter) {
3027 kn->kn_fop = &hammerread_filtops;
3030 kn->kn_fop = &hammerwrite_filtops;
3033 kn->kn_fop = &hammervnode_filtops;
3039 kn->kn_hook = (caddr_t)vp;
3041 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
3042 SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext);
3043 lwkt_reltoken(&ilock);
3049 filt_hammerdetach(struct knote *kn)
3051 struct vnode *vp = (void *)kn->kn_hook;
3054 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
3055 SLIST_REMOVE(&vp->v_pollinfo.vpi_selinfo.si_note,
3056 kn, knote, kn_selnext);
3057 lwkt_reltoken(&ilock);
3061 filt_hammerread(struct knote *kn, long hint)
3063 struct vnode *vp = (void *)kn->kn_hook;
3064 hammer_inode_t ip = VTOI(vp);
3066 if (hint == NOTE_REVOKE) {
3067 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
3070 kn->kn_data = ip->ino_data.size - kn->kn_fp->f_offset;
3071 return (kn->kn_data != 0);
3075 filt_hammerwrite(struct knote *kn, long hint)
3077 if (hint == NOTE_REVOKE)
3078 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
3084 filt_hammervnode(struct knote *kn, long hint)
3086 if (kn->kn_sfflags & hint)
3087 kn->kn_fflags |= hint;
3088 if (hint == NOTE_REVOKE) {
3089 kn->kn_flags |= EV_EOF;
3092 return (kn->kn_fflags != 0);