2 * Copyright (c) 2013 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Antonio Huete Jimenez <tuxillo@quantumachine.net>
6 * by Matthew Dillon <dillon@dragonflybsd.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * See below a small table with the vnode operation and syscall correspondence
41 * VNODE OP SCALL SCALL_AT FD PATH COMMENTS
42 * dirfs_ncreate Y Y Y Y open(2), openat(2)
43 * dirfs_nresolve - - - Y no syscall needed
44 * dirfs_nlookupdot - - - - -
45 * dirfs_nmknod Y Y Y Y mknod(2), mknodat(2)
46 * dirfs_open Y Y Y Y open(2), openat(2)
47 * dirfs_close Y Y Y Y close(2)
48 * dirfs_access - - - - data from stat(2)
49 * dirfs_getattr Y Y Y Y lstat(2), fstatat(2)
50 * dirfs_setattr - - - - -
51 * dirfs_read Y - Y - read(2).
52 * dirfs_write Y - Y - write(2).
53 * dirfs_fsync Y - Y - fsync(2)
54 * dirfs_mountctl - - - - -
55 * dirfs_nremove Y - - Y unlink(2)
56 * dirfs_nlink - - - - -
57 * dirfs_nrename Y Y Y Y rename(2), renameat(2)
58 * dirfs_nmkdir Y Y Y Y mkdir(2), mkdirat(2)
59 * dirfs_nrmdir Y - - Y rmdir(2)
60 * dirfs_nsymlink Y Y Y Y symlink(2), symlinkat(2)
61 * dirfs_readdir Y - Y - getdirentries(2)
62 * dirfs_readlink Y Y Y Y readlinkat(2)
63 * dirfs_inactive - - - - -
64 * dirfs_reclaim - - - - -
65 * dirfs_print - - - - -
66 * dirfs_pathconf - - - - -
67 * dirfs_bmap - - - - -
68 * dirfs_strategy Y - Y - pwrite(2), pread(2)
69 * dirfs_advlock - - - - -
70 * dirfs_kqfilter - - - - -
78 #include <sys/vfsops.h>
79 #include <sys/vnode.h>
81 #include <sys/namecache.h>
82 #include <sys/queue.h>
83 #include <sys/systm.h>
84 #include <sys/dirent.h>
85 #include <sys/mount.h>
86 #include <sys/signalvar.h>
87 #include <sys/resource.h>
89 #include <sys/kern_syscall.h>
95 * Kernel tracing facilities
97 KTR_INFO_MASTER_EXTERN(dirfs);
99 KTR_INFO(KTR_DIRFS, dirfs, unsupported, 0,
103 KTR_INFO(KTR_DIRFS, dirfs, nresolve, 0,
104 "DIRFS(dnp=%p ncp_name=%s parent=%p pfd=%d error=%d)",
105 dirfs_node_t dnp, char *name, dirfs_node_t pdnp, int pfd, int error);
107 KTR_INFO(KTR_DIRFS, dirfs, ncreate, 1,
108 "DIRFS(dnp=%p ncp_name=%s parent=%p pfd=%d error=%d)",
109 dirfs_node_t dnp, char *name, dirfs_node_t pdnp, int pfd, int error);
111 KTR_INFO(KTR_DIRFS, dirfs, open, 2,
112 "DIRFS(dnp=%p dn_name=%s nfd=%d)",
113 dirfs_node_t dnp, char *name, int fd);
115 KTR_INFO(KTR_DIRFS, dirfs, close, 3,
116 "DIRFS(dnp=%p fd=%d opencount=%d writecount=%d vfsync error=%d)",
117 dirfs_node_t dnp, int fd, int oc, int wc, int error);
119 KTR_INFO(KTR_DIRFS, dirfs, readdir, 4,
120 "DIRFS(dnp=%p fd=%d startoff=%jd uio_offset=%jd)",
121 dirfs_node_t dnp, int fd, off_t startoff, off_t uoff);
123 KTR_INFO(KTR_DIRFS, dirfs, access, 5,
124 "DIRFS(dnp=%p error=%d)",
125 dirfs_node_t dnp, int error);
127 KTR_INFO(KTR_DIRFS, dirfs, getattr, 6,
128 "DIRFS(dnp=%p error=%d)",
129 dirfs_node_t dnp, int error);
131 KTR_INFO(KTR_DIRFS, dirfs, setattr, 7,
132 "DIRFS(dnp=%p action=%s error=%d)",
133 dirfs_node_t dnp, const char *action, int error);
135 KTR_INFO(KTR_DIRFS, dirfs, fsync, 8,
136 "DIRFS(dnp=%p error=%d)",
137 dirfs_node_t dnp, int error);
139 KTR_INFO(KTR_DIRFS, dirfs, read, 9,
140 "DIRFS(dnp=%p size=%jd error=%d)",
141 dirfs_node_t dnp, size_t size, int error);
143 KTR_INFO(KTR_DIRFS, dirfs, write, 10,
144 "DIRFS(dnp=%p size=%jd boff=%jd uio_resid=%jd error=%d)",
145 dirfs_node_t dnp, off_t boff, size_t resid, size_t size, int error);
147 KTR_INFO(KTR_DIRFS, dirfs, strategy, 11,
148 "DIRFS(dnp=%p dnp_size=%jd iosize=%jd b_cmd=%d b_error=%d "
149 "b_resid=%d bio_off=%jd error=%d)",
150 dirfs_node_t dnp, size_t size, size_t iosize, int cmd, int berror,
151 int bresid, off_t biooff, int error);
153 KTR_INFO(KTR_DIRFS, dirfs, nremove, 12,
154 "DIRFS(dnp=%p pdnp=%p error=%d)",
155 dirfs_node_t dnp, dirfs_node_t pdnp, int error);
157 KTR_INFO(KTR_DIRFS, dirfs, nmkdir, 13,
158 "DIRFS(pdnp=%p dnp=%p nc_name=%p error=%d)",
159 dirfs_node_t dnp, dirfs_node_t pdnp, char *n, int error);
161 KTR_INFO(KTR_DIRFS, dirfs, nrmdir, 13,
162 "DIRFS(pdnp=%p dnp=%p error=%d)",
163 dirfs_node_t dnp, dirfs_node_t pdnp, int error);
165 KTR_INFO(KTR_DIRFS, dirfs, nsymlink, 14,
166 "DIRFS(dnp=%p target=%s symlink=%s error=%d)",
167 dirfs_node_t dnp, char *tgt, char *lnk, int error);
169 /* Needed prototypes */
170 int dirfs_access(struct vop_access_args *);
171 int dirfs_getattr(struct vop_getattr_args *);
172 int dirfs_setattr(struct vop_setattr_args *);
173 int dirfs_reclaim(struct vop_reclaim_args *);
176 dirfs_nresolve(struct vop_nresolve_args *ap)
178 dirfs_node_t pdnp, dnp, d1, d2;
180 struct namecache *ncp;
181 struct nchandle *nch;
195 dnp = d1 = d2 = NULL;
196 pdnp = VP_TO_NODE(dvp);
197 dmp = VFS_TO_DIRFS(mp);
199 error = dirfs_alloc_file(dmp, &dnp, pdnp, ncp, &vp, NULL, 0);
202 if (error && error == ENOENT) {
203 cache_setvp(nch, NULL);
206 cache_setvp(nch, vp);
211 KTR_LOG(dirfs_nresolve, dnp, ncp->nc_name, pdnp, pdnp->dn_fd, error);
217 dirfs_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
221 KTR_LOG(dirfs_unsupported, __func__);
227 dirfs_ncreate(struct vop_ncreate_args *ap)
232 struct namecache *ncp;
244 pdnp = VP_TO_NODE(dvp);
245 dmp = VFS_TO_DIRFS(dvp->v_mount);
247 ncp = ap->a_nch->ncp;
250 dirfs_mount_gettoken(dmp);
252 dirfs_node_getperms(pdnp, &perms);
253 if ((perms & DIRFS_NODE_WR) == 0)
256 error = dirfs_alloc_file(dmp, &dnp, pdnp, ncp, vpp, vap,
260 cache_setunresolved(ap->a_nch);
261 cache_setvp(ap->a_nch, *vpp);
264 dirfs_mount_reltoken(dmp);
266 KTR_LOG(dirfs_ncreate, dnp, ncp->nc_name, pdnp, pdnp->dn_fd, error);
272 dirfs_nmknod(struct vop_nmknod_args *v)
280 dirfs_open(struct vop_open_args *ap)
290 dnp = VP_TO_NODE(vp);
291 dmp = VFS_TO_DIRFS(vp->v_mount);
296 if (!dirfs_node_isroot(dnp)) {
297 if (!dirfs_node_hasfd(dnp))
298 error = dirfs_open_helper(dmp, dnp, DIRFS_NOFD, NULL);
304 KTR_LOG(dirfs_open, dnp, dnp->dn_name, dnp->dn_fd);
306 return vop_stdopen(ap);
310 dirfs_close(struct vop_close_args *ap)
321 dmp = VFS_TO_DIRFS(vp->v_mount);
322 dnp = VP_TO_NODE(vp);
324 if (vp->v_type == VREG) {
325 error = vfsync(vp, 0, 1, NULL, NULL);
327 dbg(5, "vfsync error=%d\n", error);
330 if (!dirfs_node_isroot(dnp) && vp->v_opencount == 1) {
331 dirfs_node_setflags(dnp, DIRFS_DOOMED);
334 KTR_LOG(dirfs_close, dnp, dnp->dn_fd, vp->v_opencount,
335 vp->v_writecount, error);
343 dirfs_access(struct vop_access_args *ap)
345 struct vnode *vp = ap->a_vp;
351 dnp = VP_TO_NODE(vp);
353 switch (vp->v_type) {
359 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
378 error = vop_helper_access(ap, dnp->dn_uid,
379 dnp->dn_gid, dnp->dn_mode, 0);
382 KTR_LOG(dirfs_access, dnp, error);
388 dirfs_getattr(struct vop_getattr_args *ap)
403 dnp = VP_TO_NODE(vp);
404 dmp = VFS_TO_DIRFS(vp->v_mount);
406 KKASSERT(dnp); /* This must not happen */
408 if (!dirfs_node_isroot(dnp)) {
409 pathnp = dirfs_findfd(dmp, dnp, &tmp, &pathfree);
411 KKASSERT(pathnp->dn_fd != DIRFS_NOFD);
413 error = dirfs_node_stat(pathnp->dn_fd, tmp, dnp);
414 dirfs_dropfd(dmp, pathnp, pathfree);
416 error = dirfs_node_stat(DIRFS_NOFD, dmp->dm_path, dnp);
420 dirfs_node_lock(dnp);
421 vap->va_nlink = dnp->dn_links;
422 vap->va_type = dnp->dn_type;
423 vap->va_mode = dnp->dn_mode;
424 vap->va_uid = dnp->dn_uid;
425 vap->va_gid = dnp->dn_gid;
426 vap->va_fileid = dnp->dn_ino;
427 vap->va_size = dnp->dn_size;
428 vap->va_blocksize = dnp->dn_blocksize;
429 vap->va_atime.tv_sec = dnp->dn_atime;
430 vap->va_atime.tv_nsec = dnp->dn_atimensec;
431 vap->va_mtime.tv_sec = dnp->dn_mtime;
432 vap->va_mtime.tv_nsec = dnp->dn_mtimensec;
433 vap->va_ctime.tv_sec = dnp->dn_ctime;
434 vap->va_ctime.tv_nsec = dnp->dn_ctimensec;
435 vap->va_bytes = dnp->dn_size;
436 vap->va_gen = dnp->dn_gen;
437 vap->va_flags = dnp->dn_flags;
438 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
439 dirfs_node_unlock(dnp);
442 KTR_LOG(dirfs_getattr, dnp, error);
448 dirfs_setattr(struct vop_setattr_args *ap)
457 const char *msg[6] = {
474 dnp = VP_TO_NODE(vp);
475 dmp = VFS_TO_DIRFS(vp->v_mount);
477 dirfs_mount_gettoken(dmp);
480 * Check for unsettable attributes.
482 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
483 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
484 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) ||
485 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
494 if (error == 0 && (vap->va_flags != VNOVAL)) {
495 if (vp->v_mount->mnt_flag & MNT_RDONLY)
498 error = dirfs_node_chflags(dnp, vap->va_flags, cred);
504 * Extend or truncate a file
506 if (error == 0 && (vap->va_size != VNOVAL)) {
507 if (vp->v_mount->mnt_flag & MNT_RDONLY)
510 error = dirfs_node_chsize(dnp, vap->va_size);
511 dbg(2, "dnp size=%jd vap size=%jd\n", dnp->dn_size, vap->va_size);
517 * Change file owner or group
519 if (error == 0 && (vap->va_uid != (uid_t)VNOVAL ||
520 vap->va_gid != (gid_t)VNOVAL)) {
521 if (vp->v_mount->mnt_flag & MNT_RDONLY) {
524 mode_t cur_mode = dnp->dn_mode;
525 uid_t cur_uid = dnp->dn_uid;
526 gid_t cur_gid = dnp->dn_gid;
528 error = vop_helper_chown(ap->a_vp, vap->va_uid,
529 vap->va_gid, ap->a_cred,
530 &cur_uid, &cur_gid, &cur_mode);
532 (cur_mode != dnp->dn_mode ||
533 cur_uid != dnp->dn_uid ||
534 cur_gid != dnp->dn_gid)) {
535 error = dirfs_node_chown(dmp, dnp, cur_uid,
546 if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) {
547 if (vp->v_mount->mnt_flag & MNT_RDONLY) {
550 mode_t cur_mode = dnp->dn_mode;
551 uid_t cur_uid = dnp->dn_uid;
552 gid_t cur_gid = dnp->dn_gid;
554 error = vop_helper_chmod(ap->a_vp, vap->va_mode,
556 cur_uid, cur_gid, &cur_mode);
557 if (error == 0 && cur_mode != dnp->dn_mode) {
558 error = dirfs_node_chmod(dmp, dnp, cur_mode);
568 if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL &&
569 vap->va_atime.tv_nsec != VNOVAL) ||
570 (vap->va_mtime.tv_sec != VNOVAL &&
571 vap->va_mtime.tv_nsec != VNOVAL) )) {
572 if (vp->v_mount->mnt_flag & MNT_RDONLY)
575 error = dirfs_node_chtimes(dnp);
581 dirfs_mount_reltoken(dmp);
583 KTR_LOG(dirfs_setattr, dnp, msg[msgno], error);
589 dirfs_fsync(struct vop_fsync_args *ap)
591 dirfs_node_t dnp = VP_TO_NODE(ap->a_vp);
596 vfsync(ap->a_vp, ap->a_waitfor, 1, NULL, NULL);
598 if (dnp->dn_fd != DIRFS_NOFD) {
599 if (fsync(dnp->dn_fd) == -1)
600 error = fsync(dnp->dn_fd);
603 KTR_LOG(dirfs_fsync, dnp, error);
609 dirfs_read(struct vop_read_args *ap)
612 struct vnode *vp = ap->a_vp;
613 struct uio *uio = ap->a_uio;
623 if (uio->uio_resid == 0) {
624 dbg(5, "zero len uio->uio_resid\n");
628 dnp = VP_TO_NODE(vp);
630 if (uio->uio_offset < 0)
632 if (vp->v_type != VREG)
635 while (uio->uio_resid > 0 && uio->uio_offset < dnp->dn_size) {
637 * Use buffer cache I/O (via dirfs_strategy)
639 offset = (size_t)uio->uio_offset & BMASK;
640 base_offset = (off_t)uio->uio_offset - offset;
641 bp = getcacheblk(vp, base_offset, BSIZE, 0);
643 lwkt_gettoken(&vp->v_mount->mnt_token);
644 error = bread(vp, base_offset, BSIZE, &bp);
647 lwkt_reltoken(&vp->v_mount->mnt_token);
648 dbg(5, "dirfs_read bread error %d\n", error);
651 lwkt_reltoken(&vp->v_mount->mnt_token);
655 * Figure out how many bytes we can actually copy this loop.
657 len = BSIZE - offset;
658 if (len > uio->uio_resid)
659 len = uio->uio_resid;
660 if (len > dnp->dn_size - uio->uio_offset)
661 len = (size_t)(dnp->dn_size - uio->uio_offset);
663 error = uiomovebp(bp, (char *)bp->b_data + offset, len, uio);
666 dbg(5, "dirfs_read uiomove error %d\n", error);
671 KTR_LOG(dirfs_read, dnp, dnp->dn_size, error);
677 dirfs_write (struct vop_write_args *ap)
682 struct vnode *vp = ap->a_vp;
683 struct uio *uio = ap->a_uio;
684 struct thread *td = uio->uio_td;
696 if (uio->uio_resid == 0) {
697 dbg(5, "zero-length uio->uio_resid\n");
701 dnp = VP_TO_NODE(vp);
702 dmp = VFS_TO_DIRFS(vp->v_mount);
704 if (vp->v_type != VREG)
707 if (vp->v_type == VREG && td != NULL) {
708 error = kern_getrlimit(RLIMIT_FSIZE, &limit);
710 dbg(5, "rlimit failure\n");
713 if (uio->uio_offset + uio->uio_resid > limit.rlim_cur) {
714 dbg(5, "file too big\n");
715 ksignal(td->td_proc, SIGXFSZ);
720 if (ap->a_ioflag & IO_APPEND)
721 uio->uio_offset = dnp->dn_size;
724 * buffer cache operations may be deferred, make sure
725 * the file is correctly sized right now.
727 osize = dnp->dn_size;
728 nsize = uio->uio_offset + uio->uio_resid;
729 if (nsize > osize && uio->uio_resid) {
730 KKASSERT(dnp->dn_fd >= 0);
731 dnp->dn_size = nsize;
732 ftruncate(dnp->dn_fd, nsize);
733 nvextendbuf(vp, osize, nsize,
734 BSIZE, BSIZE, -1, -1, 0);
735 } /* else nsize = osize; NOT USED */
737 while (uio->uio_resid > 0) {
739 * Use buffer cache I/O (via dirfs_strategy)
741 offset = (size_t)uio->uio_offset & BMASK;
742 base_offset = (off_t)uio->uio_offset - offset;
743 len = BSIZE - offset;
745 if (len > uio->uio_resid)
746 len = uio->uio_resid;
748 error = bread(vp, base_offset, BSIZE, &bp);
749 error = uiomovebp(bp, (char *)bp->b_data + offset, len, uio);
752 dbg(2, "WRITE uiomove failed\n");
756 // dbg(2, "WRITE dn_size=%jd uio_offset=%jd uio_resid=%jd base_offset=%jd\n",
757 // dnp->dn_size, uio->uio_offset, uio->uio_resid, base_offset);
759 if (ap->a_ioflag & IO_SYNC)
765 KTR_LOG(dirfs_write, dnp, base_offset, uio->uio_resid,
766 dnp->dn_size, error);
772 dirfs_advlock (struct vop_advlock_args *ap)
774 struct vnode *vp = ap->a_vp;
775 dirfs_node_t dnp = VP_TO_NODE(vp);
779 return (lf_advlock(ap, &dnp->dn_advlock, dnp->dn_size));
783 dirfs_strategy(struct vop_strategy_args *ap)
787 struct bio *bio = ap->a_bio;
788 struct buf *bp = bio->bio_buf;
789 struct vnode *vp = ap->a_vp;
797 dnp = VP_TO_NODE(vp);
798 dmp = VFS_TO_DIRFS(vp->v_mount);
802 if (vp->v_type != VREG) {
803 dbg(5, "not VREG\n");
804 bp->b_resid = bp->b_bcount;
805 bp->b_flags |= B_ERROR | B_INVAL;
806 bp->b_error = EINVAL;
811 if (dnp->dn_fd == DIRFS_NOFD) {
813 panic("Meh, no fd to write to. dnp=%p\n", dnp);
816 if (bio->bio_offset + bp->b_bcount > dnp->dn_size)
817 iosize = dnp->dn_size - bio->bio_offset;
819 iosize = bp->b_bcount;
820 KKASSERT((ssize_t)iosize >= 0);
824 error = pwrite(dnp->dn_fd, bp->b_data, iosize, bio->bio_offset);
827 error = pread(dnp->dn_fd, bp->b_data, iosize, bio->bio_offset);
830 bp->b_error = error = EINVAL;
831 bp->b_flags |= B_ERROR;
835 if (error >= 0 && error < bp->b_bcount)
836 bzero(bp->b_data + error, bp->b_bcount - error);
838 if (error < 0 && errno != EINTR) {
839 dbg(5, "error=%d dnp=%p dnp->dn_fd=%d "
840 "bio->bio_offset=%ld bcount=%d resid=%d iosize=%zd\n",
841 errno, dnp, dnp->dn_fd, bio->bio_offset, bp->b_bcount,
842 bp->b_resid, iosize);
844 bp->b_resid = bp->b_bcount;
845 bp->b_flags |= B_ERROR;
847 tmp = dirfs_node_absolute_path(dmp, dnp, &pathfree);
848 dirfs_node_stat(DIRFS_NOFD, tmp, dnp);
849 dirfs_dropfd(dmp, NULL, pathfree);
852 KTR_LOG(dirfs_strategy, dnp, dnp->dn_size, iosize, bp->b_cmd,
853 bp->b_error, bp->b_resid, bio->bio_offset, error);
861 dirfs_bmap(struct vop_bmap_args *ap)
865 if (ap->a_doffsetp != NULL)
866 *ap->a_doffsetp = ap->a_loffset;
867 if (ap->a_runp != NULL)
869 if (ap->a_runb != NULL)
876 dirfs_nremove(struct vop_nremove_args *ap)
878 dirfs_node_t dnp, pdnp;
882 struct nchandle *nch;
883 struct namecache *ncp;
899 dmp = VFS_TO_DIRFS(mp);
901 lwkt_gettoken(&mp->mnt_token);
902 cache_vget(nch, ap->a_cred, LK_SHARED, &vp);
905 pdnp = VP_TO_NODE(dvp);
906 dnp = VP_TO_NODE(vp);
908 if (vp->v_type == VDIR) {
911 pathnp = dirfs_findfd(dmp, dnp, &tmp, &pathfree);
912 dirfs_node_lock(pdnp);
913 error = unlinkat(pathnp->dn_fd, tmp, 0);
916 if (dnp->dn_parent) {
917 dirfs_node_drop(dmp, dnp->dn_parent);
918 dnp->dn_parent = NULL;
923 dirfs_node_unlock(pdnp);
924 dirfs_dropfd(dmp, pathnp, pathfree);
927 lwkt_reltoken(&mp->mnt_token);
929 KTR_LOG(dirfs_nremove, dnp, pdnp, error);
935 dirfs_nlink(struct vop_nlink_args *ap)
939 KTR_LOG(dirfs_unsupported, __func__);
945 dirfs_nrename(struct vop_nrename_args *ap)
947 dirfs_node_t dnp, fdnp, tdnp;
949 struct namecache *fncp, *tncp;
950 struct vnode *fdvp, *tdvp, *vp;
952 char *fpath, *fpathfree;
953 char *tpath, *tpathfree;
961 fncp = ap->a_fnch->ncp;
962 tncp = ap->a_tnch->ncp;
964 dmp = VFS_TO_DIRFS(mp);
965 fdnp = VP_TO_NODE(fdvp);
966 tdnp = VP_TO_NODE(tdvp);
968 dbg(5, "fdnp=%p tdnp=%p from=%s to=%s\n", fdnp, tdnp, fncp->nc_name,
971 if (fdvp->v_mount != tdvp->v_mount)
973 if (fdvp->v_mount != fncp->nc_vp->v_mount)
975 if (fdvp->v_mount->mnt_flag & MNT_RDONLY)
978 tpath = dirfs_node_absolute_path_plus(dmp, tdnp,
979 tncp->nc_name, &tpathfree);
980 fpath = dirfs_node_absolute_path_plus(dmp, fdnp,
981 fncp->nc_name, &fpathfree);
982 error = rename(fpath, tpath);
986 vp = fncp->nc_vp; /* file being renamed */
987 dnp = VP_TO_NODE(vp);
988 dirfs_node_setname(dnp, tncp->nc_name, tncp->nc_nlen);
991 * We have to mark the target file that was replaced by
992 * the rename as having been unlinked.
997 dnp = VP_TO_NODE(vp);
998 cache_unlink(ap->a_tnch);
999 if (dnp->dn_parent) {
1000 dirfs_node_drop(dmp, dnp->dn_parent);
1001 dnp->dn_parent = NULL;
1005 * nlinks on directories can be a bit weird. Zero
1009 cache_inval_vp(vp, CINV_DESTROY);
1011 cache_rename(ap->a_fnch, ap->a_tnch);
1013 dirfs_dropfd(dmp, NULL, fpathfree);
1014 dirfs_dropfd(dmp, NULL, tpathfree);
1020 dirfs_nmkdir(struct vop_nmkdir_args *ap)
1023 dirfs_node_t dnp, pdnp, dnp1;
1024 struct namecache *ncp;
1028 char *tmp, *pathfree;
1035 extrapath = error = 0;
1038 dmp = VFS_TO_DIRFS(dvp->v_mount);
1039 pdnp = VP_TO_NODE(dvp);
1040 ncp = ap->a_nch->ncp;
1042 pathfree = tmp = path = NULL;
1045 dirfs_node_lock(pdnp);
1046 if (pdnp->dn_fd != DIRFS_NOFD) {
1048 path = ncp->nc_name;
1050 dnp1 = dirfs_findfd(dmp, pdnp, &tmp, &pathfree);
1052 /* XXX check there is room to copy the path */
1053 path = kmalloc(MAXPATHLEN, M_DIRFS_MISC, M_ZERO | M_WAITOK);
1054 ksnprintf(path, MAXPATHLEN, "%s/%s", tmp, ncp->nc_name);
1056 dirfs_dropfd(dmp, dnp1, pathfree);
1059 error = mkdirat(pfd, path, vap->va_mode);
1062 } else { /* Directory has been made */
1063 error = dirfs_alloc_file(dmp, &dnp, pdnp, ncp, vpp,
1067 cache_setunresolved(ap->a_nch);
1068 cache_setvp(ap->a_nch, *vpp);
1070 dirfs_node_unlock(pdnp);
1073 kfree(path, M_DIRFS_MISC);
1075 KTR_LOG(dirfs_nmkdir, pdnp, dnp, ncp->nc_name, error);
1081 dirfs_nrmdir(struct vop_nrmdir_args *ap)
1083 dirfs_node_t dnp, pdnp;
1086 struct nchandle *nch;
1087 struct namecache *ncp;
1104 dmp = VFS_TO_DIRFS(mp);
1106 lwkt_gettoken(&mp->mnt_token);
1107 cache_vget(nch, ap->a_cred, LK_SHARED, &vp);
1110 pdnp = VP_TO_NODE(dvp);
1111 dnp = VP_TO_NODE(vp);
1113 if (vp->v_type != VDIR) {
1116 tmp = dirfs_node_absolute_path(dmp, dnp, &pathfree);
1117 dirfs_node_lock(pdnp);
1121 if (dnp->dn_parent) {
1122 dirfs_node_drop(dmp, dnp->dn_parent);
1123 dnp->dn_parent = NULL;
1127 * nlinks on directories can be a bit weird. Zero
1131 cache_inval_vp(vp, CINV_DESTROY);
1135 dirfs_node_unlock(pdnp);
1136 dirfs_dropfd(dmp, NULL, pathfree);
1139 lwkt_reltoken(&mp->mnt_token);
1141 KTR_LOG(dirfs_nrmdir, dnp, pdnp, error);
1147 dirfs_nsymlink(struct vop_nsymlink_args *ap)
1150 dirfs_node_t dnp, pdnp;
1152 struct namecache *ncp;
1156 char *tmp, *pathfree;
1166 dmp = VFS_TO_DIRFS(dvp->v_mount);
1167 pdnp = VP_TO_NODE(dvp);
1168 ncp = ap->a_nch->ncp;
1170 pathfree = tmp = path = NULL;
1173 lwkt_gettoken(&mp->mnt_token);
1174 vap->va_type = VLNK;
1176 /* Find out the whole path of our new symbolic link */
1177 tmp = dirfs_node_absolute_path(dmp, pdnp, &pathfree);
1178 /* XXX check there is room to copy the path */
1179 path = kmalloc(MAXPATHLEN, M_DIRFS_MISC, M_ZERO | M_WAITOK);
1180 ksnprintf(path, MAXPATHLEN, "%s/%s", tmp, ncp->nc_name);
1181 dirfs_dropfd(dmp, NULL, pathfree);
1183 error = symlink(ap->a_target, path);
1186 } else { /* Symlink has been made */
1187 error = dirfs_alloc_file(dmp, &dnp, pdnp, ncp, vpp,
1191 cache_setunresolved(ap->a_nch);
1192 cache_setvp(ap->a_nch, *vpp);
1194 dbg(5, "path=%s a_target=%s\n", path, ap->a_target);
1196 KTR_LOG(dirfs_nsymlink, dnp, ap->a_target, path, error);
1197 kfree(path, M_DIRFS_MISC);
1198 lwkt_reltoken(&mp->mnt_token);
1205 dirfs_readdir(struct vop_readdir_args *ap)
1208 struct dirent *dp, *dpn;
1209 off_t __unused **cookies = ap->a_cookies;
1210 int *ncookies = ap->a_ncookies;
1214 struct vnode *vp = ap->a_vp;
1226 debug(1, "ncookies=%d\n", *ncookies);
1228 dnp = VP_TO_NODE(vp);
1230 startoff = uio->uio_offset;
1236 if (vp->v_type != VDIR)
1238 if (uio->uio_resid < 0)
1240 if ((bufsiz = uio->uio_resid) > 4096)
1242 buf = kmalloc(bufsiz, M_DIRFS_MISC, M_WAITOK | M_ZERO);
1245 * Generally speaking we have to be able to process ALL the
1246 * entries returned by getdirentries() in order for the seek
1247 * position to be correct. For now try to size the buffer
1248 * to make this happen. A smaller buffer always works. For
1249 * now just use an appropriate size.
1251 dirfs_node_lock(dnp);
1252 lseek(dnp->dn_fd, startoff, SEEK_SET);
1253 bytes = getdirentries(dnp->dn_fd, buf, bufsiz, &base);
1254 dbg(5, "seek %016jx %016jx %016jx\n",
1255 (intmax_t)startoff, (intmax_t)base,
1256 (intmax_t)lseek(dnp->dn_fd, 0, SEEK_CUR));
1258 if (errno == EINVAL)
1259 panic("EINVAL on readdir\n");
1263 } else if (bytes == 0) {
1269 for (dp = (struct dirent *)buf; bytes > 0 && uio->uio_resid > 0;
1270 bytes -= _DIRENT_DIRSIZ(dp), dp = dpn) {
1271 r = vop_write_dirent(&error, uio, dp->d_ino, dp->d_type,
1272 dp->d_namlen, dp->d_name);
1275 dpn = _DIRENT_NEXT(dp);
1279 curoff = lseek(dnp->dn_fd, 0, SEEK_CUR);
1282 kfree(buf, M_DIRFS_MISC);
1283 uio->uio_offset = curoff;
1284 dirfs_node_unlock(dnp);
1286 KTR_LOG(dirfs_readdir, dnp, dnp->dn_fd, startoff, uio->uio_offset);
1292 dirfs_readlink(struct vop_readlink_args *ap)
1294 dirfs_node_t dnp, pathnp;
1299 char *tmp, *pathfree, *buf;
1307 KKASSERT(vp->v_type == VLNK);
1310 tmp = pathfree = NULL;
1313 dmp = VFS_TO_DIRFS(mp);
1314 dnp = VP_TO_NODE(vp);
1316 lwkt_gettoken(&mp->mnt_token);
1318 pathnp = dirfs_findfd(dmp, dnp, &tmp, &pathfree);
1320 buf = kmalloc(uio->uio_resid, M_DIRFS_MISC, M_WAITOK | M_ZERO);
1321 nlen = readlinkat(pathnp->dn_fd, dnp->dn_name, buf, uio->uio_resid);
1325 error = uiomove(buf, nlen + 1, uio);
1330 dirfs_dropfd(dmp, pathnp, pathfree);
1331 kfree(buf, M_DIRFS_MISC);
1333 lwkt_reltoken(&mp->mnt_token);
1339 * Main tasks to be performed.
1340 * 1) When inode is NULL recycle the vnode
1341 * 2) When the inode has 0 links:
1342 * - Check if in the TAILQ, if so remove.
1343 * - Destroy the inode.
1344 * - Recycle the vnode.
1345 * 3) If none of the above, add the node to the TAILQ
1346 * when it has a valid fd and there is room on the
1351 dirfs_inactive(struct vop_inactive_args *ap)
1358 kprintf("Called VOP_INACTIVE()\n");
1360 dmp = VFS_TO_DIRFS(vp->v_mount);
1361 dnp = VP_TO_NODE(vp);
1363 /* Degenerate case */
1365 dbg(5, "dnp was NULL\n");
1370 if (dirfs_node_refcnt(dnp) == 0)
1371 dirfs_node_free(dmp,dnp);
1374 * Deal with the case the inode has 0 links which means it was unlinked.
1376 if (dnp->dn_links == 0) {
1378 dbg(5, "recycled a vnode of an unlinked dnp\n");
1390 dirfs_reclaim(struct vop_reclaim_args *ap)
1399 dnp = VP_TO_NODE(vp);
1400 dmp = VFS_TO_DIRFS(vp->v_mount);
1402 // dirfs_free_vp(dnp);
1404 /* dnp is now invalid, may have been destroyed */
1405 dbg(5, "ending reclaim\n");
1410 dirfs_mountctl(struct vop_mountctl_args *ap)
1414 KTR_LOG(dirfs_unsupported, __func__);
1420 dirfs_print(struct vop_print_args *v)
1424 KTR_LOG(dirfs_unsupported, __func__);
1430 dirfs_pathconf(struct vop_pathconf_args *v)
1438 dirfs_kqfilter (struct vop_kqfilter_args *ap)
1442 KTR_LOG(dirfs_unsupported, __func__);
1447 struct vop_ops dirfs_vnode_vops = {
1448 .vop_default = vop_defaultop,
1449 .vop_nwhiteout = vop_compat_nwhiteout,
1450 .vop_ncreate = dirfs_ncreate,
1451 .vop_nresolve = dirfs_nresolve,
1452 .vop_markatime = vop_stdmarkatime,
1453 .vop_nlookupdotdot = dirfs_nlookupdotdot,
1454 .vop_nmknod = dirfs_nmknod,
1455 .vop_open = dirfs_open,
1456 .vop_close = dirfs_close,
1457 .vop_access = dirfs_access,
1458 .vop_getattr = dirfs_getattr,
1459 .vop_setattr = dirfs_setattr,
1460 .vop_read = dirfs_read,
1461 .vop_write = dirfs_write,
1462 .vop_fsync = dirfs_fsync,
1463 .vop_mountctl = dirfs_mountctl,
1464 .vop_nremove = dirfs_nremove,
1465 .vop_nlink = dirfs_nlink,
1466 .vop_nrename = dirfs_nrename,
1467 .vop_nmkdir = dirfs_nmkdir,
1468 .vop_nrmdir = dirfs_nrmdir,
1469 .vop_nsymlink = dirfs_nsymlink,
1470 .vop_readdir = dirfs_readdir,
1471 .vop_readlink = dirfs_readlink,
1472 .vop_inactive = dirfs_inactive,
1473 .vop_reclaim = dirfs_reclaim,
1474 .vop_print = dirfs_print,
1475 .vop_pathconf = vop_stdpathconf,
1476 .vop_bmap = dirfs_bmap,
1477 .vop_strategy = dirfs_strategy,
1478 .vop_advlock = dirfs_advlock,
1479 .vop_kqfilter = dirfs_kqfilter,
1480 .vop_getpages = vop_stdgetpages,
1481 .vop_putpages = vop_stdputpages