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 1.41 2008/04/27 00:45:37 dillon Exp $
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/fcntl.h>
41 #include <sys/namecache.h>
42 #include <sys/vnode.h>
43 #include <sys/lockf.h>
44 #include <sys/event.h>
46 #include <sys/dirent.h>
47 #include <vm/vm_extern.h>
48 #include <vfs/fifofs/fifo.h>
54 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
55 static int hammer_vop_fsync(struct vop_fsync_args *);
56 static int hammer_vop_read(struct vop_read_args *);
57 static int hammer_vop_write(struct vop_write_args *);
58 static int hammer_vop_access(struct vop_access_args *);
59 static int hammer_vop_advlock(struct vop_advlock_args *);
60 static int hammer_vop_close(struct vop_close_args *);
61 static int hammer_vop_ncreate(struct vop_ncreate_args *);
62 static int hammer_vop_getattr(struct vop_getattr_args *);
63 static int hammer_vop_nresolve(struct vop_nresolve_args *);
64 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
65 static int hammer_vop_nlink(struct vop_nlink_args *);
66 static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
67 static int hammer_vop_nmknod(struct vop_nmknod_args *);
68 static int hammer_vop_open(struct vop_open_args *);
69 static int hammer_vop_pathconf(struct vop_pathconf_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_nsymlink(struct vop_nsymlink_args *);
79 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
80 static int hammer_vop_ioctl(struct vop_ioctl_args *);
81 static int hammer_vop_mountctl(struct vop_mountctl_args *);
83 static int hammer_vop_fifoclose (struct vop_close_args *);
84 static int hammer_vop_fiforead (struct vop_read_args *);
85 static int hammer_vop_fifowrite (struct vop_write_args *);
87 static int hammer_vop_specclose (struct vop_close_args *);
88 static int hammer_vop_specread (struct vop_read_args *);
89 static int hammer_vop_specwrite (struct vop_write_args *);
91 struct vop_ops hammer_vnode_vops = {
92 .vop_default = vop_defaultop,
93 .vop_fsync = hammer_vop_fsync,
94 .vop_getpages = vop_stdgetpages,
95 .vop_putpages = vop_stdputpages,
96 .vop_read = hammer_vop_read,
97 .vop_write = hammer_vop_write,
98 .vop_access = hammer_vop_access,
99 .vop_advlock = hammer_vop_advlock,
100 .vop_close = hammer_vop_close,
101 .vop_ncreate = hammer_vop_ncreate,
102 .vop_getattr = hammer_vop_getattr,
103 .vop_inactive = hammer_vop_inactive,
104 .vop_reclaim = hammer_vop_reclaim,
105 .vop_nresolve = hammer_vop_nresolve,
106 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
107 .vop_nlink = hammer_vop_nlink,
108 .vop_nmkdir = hammer_vop_nmkdir,
109 .vop_nmknod = hammer_vop_nmknod,
110 .vop_open = hammer_vop_open,
111 .vop_pathconf = hammer_vop_pathconf,
112 .vop_print = hammer_vop_print,
113 .vop_readdir = hammer_vop_readdir,
114 .vop_readlink = hammer_vop_readlink,
115 .vop_nremove = hammer_vop_nremove,
116 .vop_nrename = hammer_vop_nrename,
117 .vop_nrmdir = hammer_vop_nrmdir,
118 .vop_setattr = hammer_vop_setattr,
119 .vop_strategy = hammer_vop_strategy,
120 .vop_nsymlink = hammer_vop_nsymlink,
121 .vop_nwhiteout = hammer_vop_nwhiteout,
122 .vop_ioctl = hammer_vop_ioctl,
123 .vop_mountctl = hammer_vop_mountctl
126 struct vop_ops hammer_spec_vops = {
127 .vop_default = spec_vnoperate,
128 .vop_fsync = hammer_vop_fsync,
129 .vop_read = hammer_vop_specread,
130 .vop_write = hammer_vop_specwrite,
131 .vop_access = hammer_vop_access,
132 .vop_close = hammer_vop_specclose,
133 .vop_getattr = hammer_vop_getattr,
134 .vop_inactive = hammer_vop_inactive,
135 .vop_reclaim = hammer_vop_reclaim,
136 .vop_setattr = hammer_vop_setattr
139 struct vop_ops hammer_fifo_vops = {
140 .vop_default = fifo_vnoperate,
141 .vop_fsync = hammer_vop_fsync,
142 .vop_read = hammer_vop_fiforead,
143 .vop_write = hammer_vop_fifowrite,
144 .vop_access = hammer_vop_access,
145 .vop_close = hammer_vop_fifoclose,
146 .vop_getattr = hammer_vop_getattr,
147 .vop_inactive = hammer_vop_inactive,
148 .vop_reclaim = hammer_vop_reclaim,
149 .vop_setattr = hammer_vop_setattr
152 static int hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
153 struct vnode *dvp, struct ucred *cred, int flags);
154 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
155 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
160 hammer_vop_vnoperate(struct vop_generic_args *)
162 return (VOCALL(&hammer_vnode_vops, ap));
167 * hammer_vop_fsync { vp, waitfor }
171 hammer_vop_fsync(struct vop_fsync_args *ap)
173 hammer_inode_t ip = VTOI(ap->a_vp);
175 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
176 if (ap->a_waitfor == MNT_WAIT)
177 hammer_wait_inode(ip);
182 * hammer_vop_read { vp, uio, ioflag, cred }
186 hammer_vop_read(struct vop_read_args *ap)
188 struct hammer_transaction trans;
197 if (ap->a_vp->v_type != VREG)
201 seqcount = ap->a_ioflag >> 16;
203 hammer_start_transaction(&trans, ip->hmp);
206 * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
209 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_rec.ino_size) {
210 offset = uio->uio_offset & HAMMER_BUFMASK;
212 error = cluster_read(ap->a_vp, ip->ino_rec.ino_size,
213 uio->uio_offset - offset, HAMMER_BUFSIZE,
214 MAXBSIZE, seqcount, &bp);
216 error = bread(ap->a_vp, uio->uio_offset - offset,
217 HAMMER_BUFSIZE, &bp);
222 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
223 n = HAMMER_BUFSIZE - offset;
224 if (n > uio->uio_resid)
226 if (n > ip->ino_rec.ino_size - uio->uio_offset)
227 n = (int)(ip->ino_rec.ino_size - uio->uio_offset);
228 error = uiomove((char *)bp->b_data + offset, n, uio);
235 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
236 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
237 ip->ino_rec.ino_atime = trans.time;
238 hammer_modify_inode(&trans, ip, HAMMER_INODE_ITIMES);
240 hammer_done_transaction(&trans);
245 * hammer_vop_write { vp, uio, ioflag, cred }
249 hammer_vop_write(struct vop_write_args *ap)
251 struct hammer_transaction trans;
252 struct hammer_inode *ip;
261 if (ap->a_vp->v_type != VREG)
266 if (ip->flags & HAMMER_INODE_RO)
270 * Create a transaction to cover the operations we perform.
272 hammer_start_transaction(&trans, ip->hmp);
278 if (ap->a_ioflag & IO_APPEND)
279 uio->uio_offset = ip->ino_rec.ino_size;
282 * Check for illegal write offsets. Valid range is 0...2^63-1
284 if (uio->uio_offset < 0 || uio->uio_offset + uio->uio_resid <= 0) {
285 hammer_done_transaction(&trans);
290 * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
293 while (uio->uio_resid > 0) {
297 * Do not allow huge writes to deadlock the buffer cache
299 if ((++count & 15) == 0) {
301 if ((ap->a_ioflag & IO_NOBWILL) == 0)
303 vn_lock(ap->a_vp, LK_EXCLUSIVE|LK_RETRY);
306 offset = uio->uio_offset & HAMMER_BUFMASK;
307 n = HAMMER_BUFSIZE - offset;
308 if (n > uio->uio_resid)
310 if (uio->uio_offset + n > ip->ino_rec.ino_size) {
311 vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
315 if (uio->uio_segflg == UIO_NOCOPY) {
317 * Issuing a write with the same data backing the
318 * buffer. Instantiate the buffer to collect the
319 * backing vm pages, then read-in any missing bits.
321 * This case is used by vop_stdputpages().
323 bp = getblk(ap->a_vp, uio->uio_offset - offset,
324 HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
325 if ((bp->b_flags & B_CACHE) == 0) {
327 error = bread(ap->a_vp,
328 uio->uio_offset - offset,
329 HAMMER_BUFSIZE, &bp);
331 } else if (offset == 0 && uio->uio_resid >= HAMMER_BUFSIZE) {
333 * entirely overwrite the buffer
335 bp = getblk(ap->a_vp, uio->uio_offset - offset,
336 HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
337 } else if (offset == 0 && uio->uio_offset >= ip->ino_rec.ino_size) {
341 bp = getblk(ap->a_vp, uio->uio_offset - offset,
342 HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
346 * Partial overwrite, read in any missing bits then
347 * replace the portion being written.
349 error = bread(ap->a_vp, uio->uio_offset - offset,
350 HAMMER_BUFSIZE, &bp);
355 error = uiomove((char *)bp->b_data + offset, n, uio);
358 * If we screwed up we have to undo any VM size changes we
364 vtruncbuf(ap->a_vp, ip->ino_rec.ino_size,
369 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
370 hammer_lock_sh(&ip->lock);
371 if (ip->ino_rec.ino_size < uio->uio_offset) {
372 ip->ino_rec.ino_size = uio->uio_offset;
373 flags = HAMMER_INODE_RDIRTY;
374 vnode_pager_setsize(ap->a_vp, ip->ino_rec.ino_size);
378 ip->ino_rec.ino_mtime = trans.time;
379 flags |= HAMMER_INODE_ITIMES | HAMMER_INODE_BUFS;
380 hammer_modify_inode(&trans, ip, flags);
381 hammer_unlock(&ip->lock);
383 if (ap->a_ioflag & IO_SYNC) {
385 } else if (ap->a_ioflag & IO_DIRECT) {
388 } else if ((ap->a_ioflag >> 16) == IO_SEQMAX &&
389 (uio->uio_offset & HAMMER_BUFMASK) == 0) {
391 * XXX HAMMER can only fsync the whole inode,
392 * doing it on every buffer would be a bad idea.
395 * If seqcount indicates sequential operation and
396 * we just finished filling a buffer, push it out
397 * now to prevent the buffer cache from becoming
398 * too full, which would trigger non-optimal
407 hammer_done_transaction(&trans);
412 * hammer_vop_access { vp, mode, cred }
416 hammer_vop_access(struct vop_access_args *ap)
418 struct hammer_inode *ip = VTOI(ap->a_vp);
423 uid = hammer_to_unix_xid(&ip->ino_data.uid);
424 gid = hammer_to_unix_xid(&ip->ino_data.gid);
426 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
427 ip->ino_data.uflags);
432 * hammer_vop_advlock { vp, id, op, fl, flags }
436 hammer_vop_advlock(struct vop_advlock_args *ap)
438 struct hammer_inode *ip = VTOI(ap->a_vp);
440 return (lf_advlock(ap, &ip->advlock, ip->ino_rec.ino_size));
444 * hammer_vop_close { vp, fflag }
448 hammer_vop_close(struct vop_close_args *ap)
450 return (vop_stdclose(ap));
454 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
456 * The operating system has already ensured that the directory entry
457 * does not exist and done all appropriate namespace locking.
461 hammer_vop_ncreate(struct vop_ncreate_args *ap)
463 struct hammer_transaction trans;
464 struct hammer_inode *dip;
465 struct hammer_inode *nip;
466 struct nchandle *nch;
470 dip = VTOI(ap->a_dvp);
472 if (dip->flags & HAMMER_INODE_RO)
476 * Create a transaction to cover the operations we perform.
478 hammer_start_transaction(&trans, dip->hmp);
481 * Create a new filesystem object of the requested type. The
482 * returned inode will be referenced and shared-locked to prevent
483 * it from being moved to the flusher.
486 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
488 kprintf("hammer_create_inode error %d\n", error);
489 hammer_done_transaction(&trans);
493 hammer_lock_sh(&nip->lock);
494 hammer_lock_sh(&dip->lock);
497 * Add the new filesystem object to the directory. This will also
498 * bump the inode's link count.
500 error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
501 hammer_finalize_inode(&trans, nip, error);
503 kprintf("hammer_ip_add_directory error %d\n", error);
504 hammer_unlock(&dip->lock);
505 hammer_unlock(&nip->lock);
511 hammer_rel_inode(nip, 0);
512 hammer_done_transaction(&trans);
515 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
516 hammer_done_transaction(&trans);
517 hammer_rel_inode(nip, 0);
519 cache_setunresolved(ap->a_nch);
520 cache_setvp(ap->a_nch, *ap->a_vpp);
527 * hammer_vop_getattr { vp, vap }
531 hammer_vop_getattr(struct vop_getattr_args *ap)
533 struct hammer_inode *ip = VTOI(ap->a_vp);
534 struct vattr *vap = ap->a_vap;
537 if (cache_check_fsmid_vp(ap->a_vp, &ip->fsmid) &&
538 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 &&
543 hammer_itimes(ap->a_vp);
546 vap->va_fsid = ip->hmp->fsid_udev;
547 vap->va_fileid = ip->ino_rec.base.base.obj_id;
548 vap->va_mode = ip->ino_data.mode;
549 vap->va_nlink = ip->ino_rec.ino_nlinks;
550 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
551 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
554 vap->va_size = ip->ino_rec.ino_size;
555 hammer_to_timespec(ip->ino_rec.ino_atime, &vap->va_atime);
556 hammer_to_timespec(ip->ino_rec.ino_mtime, &vap->va_mtime);
557 hammer_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
558 vap->va_flags = ip->ino_data.uflags;
559 vap->va_gen = 1; /* hammer inums are unique for all time */
560 vap->va_blocksize = HAMMER_BUFSIZE;
561 vap->va_bytes = (ip->ino_rec.ino_size + 63) & ~63;
562 vap->va_type = hammer_get_vnode_type(ip->ino_rec.base.base.obj_type);
563 vap->va_filerev = 0; /* XXX */
564 /* mtime uniquely identifies any adjustments made to the file */
565 vap->va_fsmid = ip->ino_rec.ino_mtime;
566 vap->va_uid_uuid = ip->ino_data.uid;
567 vap->va_gid_uuid = ip->ino_data.gid;
568 vap->va_fsid_uuid = ip->hmp->fsid;
569 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
572 switch (ip->ino_rec.base.base.obj_type) {
573 case HAMMER_OBJTYPE_CDEV:
574 case HAMMER_OBJTYPE_BDEV:
575 vap->va_rmajor = ip->ino_data.rmajor;
576 vap->va_rminor = ip->ino_data.rminor;
586 * hammer_vop_nresolve { nch, dvp, cred }
588 * Locate the requested directory entry.
592 hammer_vop_nresolve(struct vop_nresolve_args *ap)
594 struct hammer_transaction trans;
595 struct namecache *ncp;
599 struct hammer_cursor cursor;
600 union hammer_record_ondisk *rec;
610 * Misc initialization, plus handle as-of name extensions. Look for
611 * the '@@' extension. Note that as-of files and directories cannot
614 dip = VTOI(ap->a_dvp);
615 ncp = ap->a_nch->ncp;
616 asof = dip->obj_asof;
620 hammer_simple_transaction(&trans, dip->hmp);
622 for (i = 0; i < nlen; ++i) {
623 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
624 asof = hammer_str_to_tid(ncp->nc_name + i + 2);
625 flags |= HAMMER_INODE_RO;
632 * If there is no path component the time extension is relative to
636 ip = hammer_get_inode(&trans, &dip->cache[1], dip->obj_id,
637 asof, flags, &error);
639 error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
640 hammer_rel_inode(ip, 0);
646 cache_setvp(ap->a_nch, vp);
653 * Calculate the namekey and setup the key range for the scan. This
654 * works kinda like a chained hash table where the lower 32 bits
655 * of the namekey synthesize the chain.
657 * The key range is inclusive of both key_beg and key_end.
659 namekey = hammer_directory_namekey(ncp->nc_name, nlen);
661 error = hammer_init_cursor(&trans, &cursor, &dip->cache[0]);
662 cursor.key_beg.obj_id = dip->obj_id;
663 cursor.key_beg.key = namekey;
664 cursor.key_beg.create_tid = 0;
665 cursor.key_beg.delete_tid = 0;
666 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
667 cursor.key_beg.obj_type = 0;
669 cursor.key_end = cursor.key_beg;
670 cursor.key_end.key |= 0xFFFFFFFFULL;
672 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
675 * Scan all matching records (the chain), locate the one matching
676 * the requested path component.
678 * The hammer_ip_*() functions merge in-memory records with on-disk
679 * records for the purposes of the search.
682 error = hammer_ip_first(&cursor, dip);
688 error = hammer_ip_resolve_data(&cursor);
692 if (nlen == rec->entry.base.data_len &&
693 bcmp(ncp->nc_name, cursor.data, nlen) == 0) {
694 obj_id = rec->entry.obj_id;
697 error = hammer_ip_next(&cursor);
699 hammer_done_cursor(&cursor);
701 ip = hammer_get_inode(&trans, &dip->cache[1],
702 obj_id, asof, flags, &error);
704 error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
705 hammer_rel_inode(ip, 0);
711 cache_setvp(ap->a_nch, vp);
714 } else if (error == ENOENT) {
715 cache_setvp(ap->a_nch, NULL);
718 hammer_done_transaction(&trans);
723 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
725 * Locate the parent directory of a directory vnode.
727 * dvp is referenced but not locked. *vpp must be returned referenced and
728 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
729 * at the root, instead it could indicate that the directory we were in was
732 * NOTE: as-of sequences are not linked into the directory structure. If
733 * we are at the root with a different asof then the mount point, reload
734 * the same directory with the mount point's asof. I'm not sure what this
735 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
736 * get confused, but it hasn't been tested.
740 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
742 struct hammer_transaction trans;
743 struct hammer_inode *dip;
744 struct hammer_inode *ip;
745 int64_t parent_obj_id;
749 dip = VTOI(ap->a_dvp);
750 asof = dip->obj_asof;
751 parent_obj_id = dip->ino_data.parent_obj_id;
753 if (parent_obj_id == 0) {
754 if (dip->obj_id == HAMMER_OBJID_ROOT &&
755 asof != dip->hmp->asof) {
756 parent_obj_id = dip->obj_id;
757 asof = dip->hmp->asof;
758 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
759 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
767 hammer_simple_transaction(&trans, dip->hmp);
769 ip = hammer_get_inode(&trans, &dip->cache[1], parent_obj_id,
770 asof, dip->flags, &error);
772 error = hammer_get_vnode(ip, LK_EXCLUSIVE, ap->a_vpp);
773 hammer_rel_inode(ip, 0);
777 hammer_done_transaction(&trans);
782 * hammer_vop_nlink { nch, dvp, vp, cred }
786 hammer_vop_nlink(struct vop_nlink_args *ap)
788 struct hammer_transaction trans;
789 struct hammer_inode *dip;
790 struct hammer_inode *ip;
791 struct nchandle *nch;
795 dip = VTOI(ap->a_dvp);
798 if (dip->flags & HAMMER_INODE_RO)
800 if (ip->flags & HAMMER_INODE_RO)
804 * Create a transaction to cover the operations we perform.
806 hammer_start_transaction(&trans, dip->hmp);
809 * Add the filesystem object to the directory. Note that neither
810 * dip nor ip are referenced or locked, but their vnodes are
811 * referenced. This function will bump the inode's link count.
813 hammer_lock_sh(&ip->lock);
814 hammer_lock_sh(&dip->lock);
815 error = hammer_ip_add_directory(&trans, dip, nch->ncp, ip);
816 hammer_unlock(&dip->lock);
817 hammer_unlock(&ip->lock);
823 cache_setunresolved(nch);
824 cache_setvp(nch, ap->a_vp);
826 hammer_done_transaction(&trans);
831 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
833 * The operating system has already ensured that the directory entry
834 * does not exist and done all appropriate namespace locking.
838 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
840 struct hammer_transaction trans;
841 struct hammer_inode *dip;
842 struct hammer_inode *nip;
843 struct nchandle *nch;
847 dip = VTOI(ap->a_dvp);
849 if (dip->flags & HAMMER_INODE_RO)
853 * Create a transaction to cover the operations we perform.
855 hammer_start_transaction(&trans, dip->hmp);
858 * Create a new filesystem object of the requested type. The
859 * returned inode will be referenced but not locked.
861 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
863 kprintf("hammer_mkdir error %d\n", error);
864 hammer_done_transaction(&trans);
869 * Add the new filesystem object to the directory. This will also
870 * bump the inode's link count.
872 hammer_lock_sh(&nip->lock);
873 hammer_lock_sh(&dip->lock);
874 error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
875 hammer_finalize_inode(&trans, nip, error);
876 hammer_unlock(&dip->lock);
877 hammer_unlock(&nip->lock);
879 kprintf("hammer_mkdir (add) error %d\n", error);
885 hammer_rel_inode(nip, 0);
888 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
889 hammer_rel_inode(nip, 0);
891 cache_setunresolved(ap->a_nch);
892 cache_setvp(ap->a_nch, *ap->a_vpp);
895 hammer_done_transaction(&trans);
900 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
902 * The operating system has already ensured that the directory entry
903 * does not exist and done all appropriate namespace locking.
907 hammer_vop_nmknod(struct vop_nmknod_args *ap)
909 struct hammer_transaction trans;
910 struct hammer_inode *dip;
911 struct hammer_inode *nip;
912 struct nchandle *nch;
916 dip = VTOI(ap->a_dvp);
918 if (dip->flags & HAMMER_INODE_RO)
922 * Create a transaction to cover the operations we perform.
924 hammer_start_transaction(&trans, dip->hmp);
927 * Create a new filesystem object of the requested type. The
928 * returned inode will be referenced but not locked.
930 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
932 hammer_done_transaction(&trans);
938 * Add the new filesystem object to the directory. This will also
939 * bump the inode's link count.
941 hammer_lock_sh(&nip->lock);
942 hammer_lock_sh(&dip->lock);
943 error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
944 hammer_finalize_inode(&trans, nip, error);
945 hammer_unlock(&dip->lock);
946 hammer_unlock(&nip->lock);
952 hammer_rel_inode(nip, 0);
955 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
956 hammer_rel_inode(nip, 0);
958 cache_setunresolved(ap->a_nch);
959 cache_setvp(ap->a_nch, *ap->a_vpp);
962 hammer_done_transaction(&trans);
967 * hammer_vop_open { vp, mode, cred, fp }
971 hammer_vop_open(struct vop_open_args *ap)
973 if ((ap->a_mode & FWRITE) && (VTOI(ap->a_vp)->flags & HAMMER_INODE_RO))
976 return(vop_stdopen(ap));
980 * hammer_vop_pathconf { vp, name, retval }
984 hammer_vop_pathconf(struct vop_pathconf_args *ap)
990 * hammer_vop_print { vp }
994 hammer_vop_print(struct vop_print_args *ap)
1000 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
1004 hammer_vop_readdir(struct vop_readdir_args *ap)
1006 struct hammer_transaction trans;
1007 struct hammer_cursor cursor;
1008 struct hammer_inode *ip;
1010 hammer_record_ondisk_t rec;
1011 hammer_base_elm_t base;
1019 ip = VTOI(ap->a_vp);
1021 saveoff = uio->uio_offset;
1023 if (ap->a_ncookies) {
1024 ncookies = uio->uio_resid / 16 + 1;
1025 if (ncookies > 1024)
1027 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1035 hammer_simple_transaction(&trans, ip->hmp);
1038 * Handle artificial entries
1042 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1046 cookies[cookie_index] = saveoff;
1049 if (cookie_index == ncookies)
1053 if (ip->ino_data.parent_obj_id) {
1054 r = vop_write_dirent(&error, uio,
1055 ip->ino_data.parent_obj_id,
1058 r = vop_write_dirent(&error, uio,
1059 ip->obj_id, DT_DIR, 2, "..");
1064 cookies[cookie_index] = saveoff;
1067 if (cookie_index == ncookies)
1072 * Key range (begin and end inclusive) to scan. Directory keys
1073 * directly translate to a 64 bit 'seek' position.
1075 hammer_init_cursor(&trans, &cursor, &ip->cache[0]);
1076 cursor.key_beg.obj_id = ip->obj_id;
1077 cursor.key_beg.create_tid = 0;
1078 cursor.key_beg.delete_tid = 0;
1079 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1080 cursor.key_beg.obj_type = 0;
1081 cursor.key_beg.key = saveoff;
1083 cursor.key_end = cursor.key_beg;
1084 cursor.key_end.key = HAMMER_MAX_KEY;
1085 cursor.asof = ip->obj_asof;
1086 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1088 error = hammer_ip_first(&cursor, ip);
1090 while (error == 0) {
1091 error = hammer_ip_resolve_record_and_data(&cursor);
1094 rec = cursor.record;
1095 base = &rec->base.base;
1096 saveoff = base->key;
1098 if (base->obj_id != ip->obj_id)
1099 panic("readdir: bad record at %p", cursor.node);
1101 r = vop_write_dirent(
1102 &error, uio, rec->entry.obj_id,
1103 hammer_get_dtype(rec->entry.base.base.obj_type),
1104 rec->entry.base.data_len,
1105 (void *)cursor.data);
1110 cookies[cookie_index] = base->key;
1112 if (cookie_index == ncookies)
1114 error = hammer_ip_next(&cursor);
1116 hammer_done_cursor(&cursor);
1119 hammer_done_transaction(&trans);
1122 *ap->a_eofflag = (error == ENOENT);
1123 uio->uio_offset = saveoff;
1124 if (error && cookie_index == 0) {
1125 if (error == ENOENT)
1128 kfree(cookies, M_TEMP);
1129 *ap->a_ncookies = 0;
1130 *ap->a_cookies = NULL;
1133 if (error == ENOENT)
1136 *ap->a_ncookies = cookie_index;
1137 *ap->a_cookies = cookies;
1144 * hammer_vop_readlink { vp, uio, cred }
1148 hammer_vop_readlink(struct vop_readlink_args *ap)
1150 struct hammer_transaction trans;
1151 struct hammer_cursor cursor;
1152 struct hammer_inode *ip;
1155 ip = VTOI(ap->a_vp);
1157 hammer_simple_transaction(&trans, ip->hmp);
1159 hammer_init_cursor(&trans, &cursor, &ip->cache[0]);
1162 * Key range (begin and end inclusive) to scan. Directory keys
1163 * directly translate to a 64 bit 'seek' position.
1165 cursor.key_beg.obj_id = ip->obj_id;
1166 cursor.key_beg.create_tid = 0;
1167 cursor.key_beg.delete_tid = 0;
1168 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1169 cursor.key_beg.obj_type = 0;
1170 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1171 cursor.asof = ip->obj_asof;
1172 cursor.flags |= HAMMER_CURSOR_ASOF;
1174 error = hammer_ip_lookup(&cursor, ip);
1176 error = hammer_ip_resolve_data(&cursor);
1178 error = uiomove((char *)cursor.data,
1179 cursor.record->base.data_len,
1183 hammer_done_cursor(&cursor);
1184 hammer_done_transaction(&trans);
1189 * hammer_vop_nremove { nch, dvp, cred }
1193 hammer_vop_nremove(struct vop_nremove_args *ap)
1195 struct hammer_transaction trans;
1198 hammer_start_transaction(&trans, VTOI(ap->a_dvp)->hmp);
1199 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0);
1200 hammer_done_transaction(&trans);
1206 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1210 hammer_vop_nrename(struct vop_nrename_args *ap)
1212 struct hammer_transaction trans;
1213 struct namecache *fncp;
1214 struct namecache *tncp;
1215 struct hammer_inode *fdip;
1216 struct hammer_inode *tdip;
1217 struct hammer_inode *ip;
1218 struct hammer_cursor cursor;
1219 union hammer_record_ondisk *rec;
1223 fdip = VTOI(ap->a_fdvp);
1224 tdip = VTOI(ap->a_tdvp);
1225 fncp = ap->a_fnch->ncp;
1226 tncp = ap->a_tnch->ncp;
1227 ip = VTOI(fncp->nc_vp);
1228 KKASSERT(ip != NULL);
1230 if (fdip->flags & HAMMER_INODE_RO)
1232 if (tdip->flags & HAMMER_INODE_RO)
1234 if (ip->flags & HAMMER_INODE_RO)
1237 hammer_start_transaction(&trans, fdip->hmp);
1239 hammer_lock_sh(&ip->lock);
1240 if (fdip->obj_id < tdip->obj_id) {
1241 hammer_lock_sh(&fdip->lock);
1242 hammer_lock_sh(&tdip->lock);
1244 hammer_lock_sh(&tdip->lock);
1245 hammer_lock_sh(&fdip->lock);
1249 * Remove tncp from the target directory and then link ip as
1250 * tncp. XXX pass trans to dounlink
1252 * Force the inode sync-time to match the transaction so it is
1253 * in-sync with the creation of the target directory entry.
1255 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp, ap->a_cred, 0);
1256 if (error == 0 || error == ENOENT) {
1257 error = hammer_ip_add_directory(&trans, tdip, tncp, ip);
1259 ip->ino_data.parent_obj_id = tdip->obj_id;
1260 hammer_modify_inode(&trans, ip, HAMMER_INODE_DDIRTY);
1264 goto failed; /* XXX */
1267 * Locate the record in the originating directory and remove it.
1269 * Calculate the namekey and setup the key range for the scan. This
1270 * works kinda like a chained hash table where the lower 32 bits
1271 * of the namekey synthesize the chain.
1273 * The key range is inclusive of both key_beg and key_end.
1275 namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
1277 hammer_init_cursor(&trans, &cursor, &fdip->cache[0]);
1278 cursor.key_beg.obj_id = fdip->obj_id;
1279 cursor.key_beg.key = namekey;
1280 cursor.key_beg.create_tid = 0;
1281 cursor.key_beg.delete_tid = 0;
1282 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1283 cursor.key_beg.obj_type = 0;
1285 cursor.key_end = cursor.key_beg;
1286 cursor.key_end.key |= 0xFFFFFFFFULL;
1287 cursor.asof = fdip->obj_asof;
1288 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1291 * Scan all matching records (the chain), locate the one matching
1292 * the requested path component.
1294 * The hammer_ip_*() functions merge in-memory records with on-disk
1295 * records for the purposes of the search.
1297 error = hammer_ip_first(&cursor, fdip);
1298 while (error == 0) {
1299 if (hammer_ip_resolve_data(&cursor) != 0)
1301 rec = cursor.record;
1302 if (fncp->nc_nlen == rec->entry.base.data_len &&
1303 bcmp(fncp->nc_name, cursor.data, fncp->nc_nlen) == 0) {
1306 error = hammer_ip_next(&cursor);
1310 * If all is ok we have to get the inode so we can adjust nlinks.
1312 * WARNING: hammer_ip_del_directory() may have to terminate the
1313 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
1317 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1320 * XXX A deadlock here will break rename's atomicy for the purposes
1321 * of crash recovery.
1323 if (error == EDEADLK) {
1324 hammer_unlock(&ip->lock);
1325 hammer_unlock(&fdip->lock);
1326 hammer_unlock(&tdip->lock);
1327 hammer_done_cursor(&cursor);
1328 hammer_lock_sh(&ip->lock);
1329 if (fdip->obj_id < tdip->obj_id) {
1330 hammer_lock_sh(&fdip->lock);
1331 hammer_lock_sh(&tdip->lock);
1333 hammer_lock_sh(&tdip->lock);
1334 hammer_lock_sh(&fdip->lock);
1340 * Cleanup and tell the kernel that the rename succeeded.
1342 hammer_done_cursor(&cursor);
1344 cache_rename(ap->a_fnch, ap->a_tnch);
1347 hammer_unlock(&ip->lock);
1348 hammer_unlock(&fdip->lock);
1349 hammer_unlock(&tdip->lock);
1350 hammer_done_transaction(&trans);
1355 * hammer_vop_nrmdir { nch, dvp, cred }
1359 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1361 struct hammer_transaction trans;
1364 hammer_start_transaction(&trans, VTOI(ap->a_dvp)->hmp);
1365 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0);
1366 hammer_done_transaction(&trans);
1372 * hammer_vop_setattr { vp, vap, cred }
1376 hammer_vop_setattr(struct vop_setattr_args *ap)
1378 struct hammer_transaction trans;
1380 struct hammer_inode *ip;
1389 ip = ap->a_vp->v_data;
1392 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1394 if (ip->flags & HAMMER_INODE_RO)
1397 hammer_start_transaction(&trans, ip->hmp);
1398 hammer_lock_sh(&ip->lock);
1401 if (vap->va_flags != VNOVAL) {
1402 flags = ip->ino_data.uflags;
1403 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1404 hammer_to_unix_xid(&ip->ino_data.uid),
1407 if (ip->ino_data.uflags != flags) {
1408 ip->ino_data.uflags = flags;
1409 modflags |= HAMMER_INODE_DDIRTY;
1411 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1418 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1422 if (vap->va_uid != (uid_t)VNOVAL) {
1423 hammer_guid_to_uuid(&uuid, vap->va_uid);
1424 if (bcmp(&uuid, &ip->ino_data.uid, sizeof(uuid)) != 0) {
1425 ip->ino_data.uid = uuid;
1426 modflags |= HAMMER_INODE_DDIRTY;
1429 if (vap->va_gid != (uid_t)VNOVAL) {
1430 hammer_guid_to_uuid(&uuid, vap->va_gid);
1431 if (bcmp(&uuid, &ip->ino_data.gid, sizeof(uuid)) != 0) {
1432 ip->ino_data.gid = uuid;
1433 modflags |= HAMMER_INODE_DDIRTY;
1436 while (vap->va_size != VNOVAL && ip->ino_rec.ino_size != vap->va_size) {
1437 switch(ap->a_vp->v_type) {
1439 if (vap->va_size == ip->ino_rec.ino_size)
1442 * XXX break atomicy, we can deadlock the backend
1443 * if we do not release the lock. Probably not a
1446 hammer_unlock(&ip->lock);
1447 if (vap->va_size < ip->ino_rec.ino_size) {
1448 vtruncbuf(ap->a_vp, vap->va_size,
1452 vnode_pager_setsize(ap->a_vp, vap->va_size);
1455 hammer_lock_sh(&ip->lock);
1456 ip->ino_rec.ino_size = vap->va_size;
1457 modflags |= HAMMER_INODE_RDIRTY;
1458 aligned_size = (vap->va_size + HAMMER_BUFMASK) &
1462 * on-media truncation is cached in the inode until
1463 * the inode is synchronized.
1466 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1467 ip->flags |= HAMMER_INODE_TRUNCATED;
1468 ip->trunc_off = vap->va_size;
1469 } else if (ip->trunc_off > vap->va_size) {
1470 ip->trunc_off = vap->va_size;
1475 * If truncating we have to clean out a portion of
1476 * the last block on-disk. We do this in the
1477 * front-end buffer cache.
1479 if (truncating && vap->va_size < aligned_size) {
1483 offset = vap->va_size & HAMMER_BUFMASK;
1484 error = bread(ap->a_vp,
1485 aligned_size - HAMMER_BUFSIZE,
1486 HAMMER_BUFSIZE, &bp);
1488 bzero(bp->b_data + offset,
1489 HAMMER_BUFSIZE - offset);
1497 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1498 ip->flags |= HAMMER_INODE_TRUNCATED;
1499 ip->trunc_off = vap->va_size;
1500 } else if (ip->trunc_off > vap->va_size) {
1501 ip->trunc_off = vap->va_size;
1503 ip->ino_rec.ino_size = vap->va_size;
1504 modflags |= HAMMER_INODE_RDIRTY;
1512 if (vap->va_atime.tv_sec != VNOVAL) {
1513 ip->ino_rec.ino_atime =
1514 hammer_timespec_to_transid(&vap->va_atime);
1515 modflags |= HAMMER_INODE_ITIMES;
1517 if (vap->va_mtime.tv_sec != VNOVAL) {
1518 ip->ino_rec.ino_mtime =
1519 hammer_timespec_to_transid(&vap->va_mtime);
1520 modflags |= HAMMER_INODE_ITIMES;
1522 if (vap->va_mode != (mode_t)VNOVAL) {
1523 if (ip->ino_data.mode != vap->va_mode) {
1524 ip->ino_data.mode = vap->va_mode;
1525 modflags |= HAMMER_INODE_DDIRTY;
1530 hammer_modify_inode(&trans, ip, modflags);
1531 hammer_unlock(&ip->lock);
1532 hammer_done_transaction(&trans);
1537 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1541 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
1543 struct hammer_transaction trans;
1544 struct hammer_inode *dip;
1545 struct hammer_inode *nip;
1546 struct nchandle *nch;
1547 hammer_record_t record;
1551 ap->a_vap->va_type = VLNK;
1554 dip = VTOI(ap->a_dvp);
1556 if (dip->flags & HAMMER_INODE_RO)
1560 * Create a transaction to cover the operations we perform.
1562 hammer_start_transaction(&trans, dip->hmp);
1565 * Create a new filesystem object of the requested type. The
1566 * returned inode will be referenced but not locked.
1569 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
1571 hammer_done_transaction(&trans);
1577 * Add the new filesystem object to the directory. This will also
1578 * bump the inode's link count.
1580 hammer_lock_sh(&nip->lock);
1581 hammer_lock_sh(&dip->lock);
1582 error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
1585 * Add a record representing the symlink. symlink stores the link
1586 * as pure data, not a string, and is no \0 terminated.
1589 record = hammer_alloc_mem_record(nip);
1590 bytes = strlen(ap->a_target);
1592 record->rec.base.base.key = HAMMER_FIXKEY_SYMLINK;
1593 record->rec.base.base.rec_type = HAMMER_RECTYPE_FIX;
1594 record->rec.base.data_len = bytes;
1595 record->data = (void *)ap->a_target;
1596 /* will be reallocated by routine below */
1597 error = hammer_ip_add_record(&trans, record);
1600 * Set the file size to the length of the link.
1603 nip->ino_rec.ino_size = bytes;
1604 hammer_modify_inode(&trans, nip, HAMMER_INODE_RDIRTY);
1607 hammer_finalize_inode(&trans, nip, error);
1608 hammer_unlock(&dip->lock);
1609 hammer_unlock(&nip->lock);
1615 hammer_rel_inode(nip, 0);
1618 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
1619 hammer_rel_inode(nip, 0);
1621 cache_setunresolved(ap->a_nch);
1622 cache_setvp(ap->a_nch, *ap->a_vpp);
1625 hammer_done_transaction(&trans);
1630 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
1634 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
1636 struct hammer_transaction trans;
1639 hammer_start_transaction(&trans, VTOI(ap->a_dvp)->hmp);
1640 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
1641 ap->a_cred, ap->a_flags);
1642 hammer_done_transaction(&trans);
1648 * hammer_vop_ioctl { vp, command, data, fflag, cred }
1652 hammer_vop_ioctl(struct vop_ioctl_args *ap)
1654 struct hammer_inode *ip = ap->a_vp->v_data;
1656 return(hammer_ioctl(ip, ap->a_command, ap->a_data,
1657 ap->a_fflag, ap->a_cred));
1662 hammer_vop_mountctl(struct vop_mountctl_args *ap)
1667 mp = ap->a_head.a_ops->head.vv_mount;
1670 case MOUNTCTL_SET_EXPORT:
1671 if (ap->a_ctllen != sizeof(struct export_args))
1673 error = hammer_vfs_export(mp, ap->a_op,
1674 (const struct export_args *)ap->a_ctl);
1677 error = journal_mountctl(ap);
1684 * hammer_vop_strategy { vp, bio }
1686 * Strategy call, used for regular file read & write only. Note that the
1687 * bp may represent a cluster.
1689 * To simplify operation and allow better optimizations in the future,
1690 * this code does not make any assumptions with regards to buffer alignment
1695 hammer_vop_strategy(struct vop_strategy_args *ap)
1700 bp = ap->a_bio->bio_buf;
1704 error = hammer_vop_strategy_read(ap);
1707 error = hammer_vop_strategy_write(ap);
1710 bp->b_error = error = EINVAL;
1711 bp->b_flags |= B_ERROR;
1719 * Read from a regular file. Iterate the related records and fill in the
1720 * BIO/BUF. Gaps are zero-filled.
1722 * The support code in hammer_object.c should be used to deal with mixed
1723 * in-memory and on-disk records.
1729 hammer_vop_strategy_read(struct vop_strategy_args *ap)
1731 struct hammer_transaction trans;
1732 struct hammer_inode *ip;
1733 struct hammer_cursor cursor;
1734 hammer_record_ondisk_t rec;
1735 hammer_base_elm_t base;
1748 ip = ap->a_vp->v_data;
1750 hammer_simple_transaction(&trans, ip->hmp);
1751 hammer_init_cursor(&trans, &cursor, &ip->cache[0]);
1754 * Key range (begin and end inclusive) to scan. Note that the key's
1755 * stored in the actual records represent BASE+LEN, not BASE. The
1756 * first record containing bio_offset will have a key > bio_offset.
1758 cursor.key_beg.obj_id = ip->obj_id;
1759 cursor.key_beg.create_tid = 0;
1760 cursor.key_beg.delete_tid = 0;
1761 cursor.key_beg.obj_type = 0;
1762 cursor.key_beg.key = bio->bio_offset + 1;
1763 cursor.asof = ip->obj_asof;
1764 cursor.flags |= HAMMER_CURSOR_ASOF | HAMMER_CURSOR_DATAEXTOK;
1766 cursor.key_end = cursor.key_beg;
1767 KKASSERT(ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_REGFILE);
1769 if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1770 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
1771 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
1772 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1776 ran_end = bio->bio_offset + bp->b_bufsize;
1777 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
1778 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
1779 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
1780 if (tmp64 < ran_end)
1781 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1783 cursor.key_end.key = ran_end + MAXPHYS + 1;
1785 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
1787 error = hammer_ip_first(&cursor, ip);
1790 while (error == 0) {
1791 error = hammer_ip_resolve_data(&cursor);
1794 rec = cursor.record;
1795 base = &rec->base.base;
1797 rec_offset = base->key - rec->data.base.data_len;
1800 * Calculate the gap, if any, and zero-fill it.
1802 n = (int)(rec_offset - (bio->bio_offset + boff));
1804 if (n > bp->b_bufsize - boff)
1805 n = bp->b_bufsize - boff;
1806 bzero((char *)bp->b_data + boff, n);
1812 * Calculate the data offset in the record and the number
1813 * of bytes we can copy.
1815 * Note there is a degenerate case here where boff may
1816 * already be at bp->b_bufsize.
1820 n = rec->data.base.data_len - roff;
1822 if (n > bp->b_bufsize - boff)
1823 n = bp->b_bufsize - boff;
1826 * If we cached a truncation point on our front-end the
1827 * on-disk version may still have physical records beyond
1828 * that point. Truncate visibility.
1830 if (ip->trunc_off <= rec_offset)
1832 else if (ip->trunc_off < rec_offset + n)
1833 n = (int)(ip->trunc_off - rec_offset);
1839 bcopy((char *)cursor.data + roff,
1840 (char *)bp->b_data + boff, n);
1843 if (boff == bp->b_bufsize)
1845 error = hammer_ip_next(&cursor);
1847 hammer_done_cursor(&cursor);
1848 hammer_done_transaction(&trans);
1851 * There may have been a gap after the last record
1853 if (error == ENOENT)
1855 if (error == 0 && boff != bp->b_bufsize) {
1856 KKASSERT(boff < bp->b_bufsize);
1857 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
1858 /* boff = bp->b_bufsize; */
1861 bp->b_error = error;
1863 bp->b_flags |= B_ERROR;
1869 * Write to a regular file. Because this is a strategy call the OS is
1870 * trying to actually sync data to the media. HAMMER can only flush
1871 * the entire inode (so the TID remains properly synchronized).
1873 * Basically all we do here is place the bio on the inode's flush queue
1874 * and activate the flusher.
1878 hammer_vop_strategy_write(struct vop_strategy_args *ap)
1886 ip = ap->a_vp->v_data;
1888 if (ip->flags & HAMMER_INODE_RO) {
1889 bp->b_error = EROFS;
1890 bp->b_flags |= B_ERROR;
1896 * If the inode is being flushed we cannot re-queue buffers
1897 * it may have already flushed, or it could result in duplicate
1898 * records in the database.
1901 if (ip->flush_state == HAMMER_FST_FLUSH)
1902 TAILQ_INSERT_TAIL(&ip->bio_alt_list, bio, bio_act);
1904 TAILQ_INSERT_TAIL(&ip->bio_list, bio, bio_act);
1905 hammer_modify_inode(NULL, ip, HAMMER_INODE_XDIRTY);
1906 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
1912 * Backend code which actually performs the write to the media. This
1913 * routine is typically called from the flusher. The bio will be disposed
1914 * of (biodone'd) by this routine.
1916 * Iterate the related records and mark for deletion. If existing edge
1917 * records (left and right side) overlap our write they have to be marked
1918 * deleted and new records created, usually referencing a portion of the
1919 * original data. Then add a record to represent the buffer.
1922 hammer_dowrite(hammer_transaction_t trans, hammer_inode_t ip, struct bio *bio)
1924 struct buf *bp = bio->bio_buf;
1927 KKASSERT(ip->flush_state == HAMMER_FST_FLUSH);
1930 * Delete any records overlapping our range. This function will
1931 * (eventually) properly truncate partial overlaps.
1933 if (ip->sync_ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1934 error = hammer_ip_delete_range(trans, ip, bio->bio_offset,
1937 error = hammer_ip_delete_range(trans, ip, bio->bio_offset,
1943 * Add a single record to cover the write. We can write a record
1944 * with only the actual file data - for example, a small 200 byte
1945 * file does not have to write out a 16K record.
1947 * While the data size does not have to be aligned, we still do it
1948 * to reduce fragmentation in a future allocation model.
1953 if (ip->sync_ino_rec.ino_size - bio->bio_offset >
1955 limit_size = bp->b_bufsize;
1957 limit_size = (int)(ip->sync_ino_rec.ino_size -
1959 KKASSERT(limit_size >= 0);
1960 limit_size = (limit_size + 63) & ~63;
1962 error = hammer_ip_sync_data(trans, ip, bio->bio_offset,
1963 bp->b_data, limit_size);
1967 bp->b_resid = bp->b_bufsize;
1968 bp->b_error = error;
1969 bp->b_flags |= B_ERROR;
1978 * dounlink - disconnect a directory entry
1980 * XXX whiteout support not really in yet
1983 hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
1984 struct vnode *dvp, struct ucred *cred, int flags)
1986 struct namecache *ncp;
1989 hammer_record_ondisk_t rec;
1990 struct hammer_cursor cursor;
1995 * Calculate the namekey and setup the key range for the scan. This
1996 * works kinda like a chained hash table where the lower 32 bits
1997 * of the namekey synthesize the chain.
1999 * The key range is inclusive of both key_beg and key_end.
2004 if (dip->flags & HAMMER_INODE_RO)
2007 namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
2009 hammer_init_cursor(trans, &cursor, &dip->cache[0]);
2010 cursor.key_beg.obj_id = dip->obj_id;
2011 cursor.key_beg.key = namekey;
2012 cursor.key_beg.create_tid = 0;
2013 cursor.key_beg.delete_tid = 0;
2014 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2015 cursor.key_beg.obj_type = 0;
2017 cursor.key_end = cursor.key_beg;
2018 cursor.key_end.key |= 0xFFFFFFFFULL;
2019 cursor.asof = dip->obj_asof;
2020 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
2023 * Scan all matching records (the chain), locate the one matching
2024 * the requested path component. info->last_error contains the
2025 * error code on search termination and could be 0, ENOENT, or
2028 * The hammer_ip_*() functions merge in-memory records with on-disk
2029 * records for the purposes of the search.
2031 error = hammer_ip_first(&cursor, dip);
2032 while (error == 0) {
2033 error = hammer_ip_resolve_data(&cursor);
2036 rec = cursor.record;
2037 if (ncp->nc_nlen == rec->entry.base.data_len &&
2038 bcmp(ncp->nc_name, cursor.data, ncp->nc_nlen) == 0) {
2041 error = hammer_ip_next(&cursor);
2045 * If all is ok we have to get the inode so we can adjust nlinks.
2047 * If the target is a directory, it must be empty.
2050 ip = hammer_get_inode(trans, &dip->cache[1],
2052 dip->hmp->asof, 0, &error);
2053 if (error == ENOENT) {
2054 kprintf("obj_id %016llx\n", rec->entry.obj_id);
2055 Debugger("ENOENT unlinking object that should exist");
2057 if (error == 0 && ip->ino_rec.base.base.obj_type ==
2058 HAMMER_OBJTYPE_DIRECTORY) {
2059 error = hammer_ip_check_directory_empty(trans, ip);
2062 * WARNING: hammer_ip_del_directory() may have to terminate
2063 * the cursor to avoid a lock recursion. It's ok to call
2064 * hammer_done_cursor() twice.
2067 hammer_lock_sh(&ip->lock);
2068 hammer_lock_sh(&dip->lock);
2069 error = hammer_ip_del_directory(trans, &cursor,
2071 hammer_unlock(&dip->lock);
2072 hammer_unlock(&ip->lock);
2075 cache_setunresolved(nch);
2076 cache_setvp(nch, NULL);
2079 cache_inval_vp(ip->vp, CINV_DESTROY);
2081 hammer_rel_inode(ip, 0);
2083 hammer_done_cursor(&cursor);
2084 if (error == EDEADLK)
2090 /************************************************************************
2091 * FIFO AND SPECFS OPS *
2092 ************************************************************************
2097 hammer_vop_fifoclose (struct vop_close_args *ap)
2099 /* XXX update itimes */
2100 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
2104 hammer_vop_fiforead (struct vop_read_args *ap)
2108 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2109 /* XXX update access time */
2114 hammer_vop_fifowrite (struct vop_write_args *ap)
2118 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2119 /* XXX update access time */
2124 hammer_vop_specclose (struct vop_close_args *ap)
2126 /* XXX update itimes */
2127 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2131 hammer_vop_specread (struct vop_read_args *ap)
2133 /* XXX update access time */
2134 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2138 hammer_vop_specwrite (struct vop_write_args *ap)
2140 /* XXX update last change time */
2141 return (VOCALL(&spec_vnode_vops, &ap->a_head));