2 * modified for EXT2FS support in Lites 1.1
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
8 * Copyright (c) 1982, 1986, 1989, 1993
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44 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95
45 * @(#)ext2_vnops.c 8.7 (Berkeley) 2/3/94
46 * $FreeBSD: src/sys/gnu/ext2fs/ext2_vnops.c,v 1.51.2.2 2003/01/02 17:26:18 bde Exp $
47 * $DragonFly: src/sys/vfs/gnu/ext2fs/ext2_vnops.c,v 1.19 2005/02/15 08:32:18 joerg Exp $
50 #include "opt_quota.h"
51 #include "opt_suiddir.h"
53 #include <sys/param.h>
54 #include <sys/systm.h>
55 #include <sys/resourcevar.h>
56 #include <sys/kernel.h>
60 #include <sys/mount.h>
62 #include <sys/vnode.h>
63 #include <sys/namei.h>
66 #include <vm/vm_extern.h>
67 #include <vm/vm_zone.h>
68 #include <vm/vnode_pager.h>
71 #include <sys/signalvar.h>
72 #include <vfs/ufs/dir.h>
73 #include <vfs/ufs/quota.h>
74 #include <vfs/ufs/inode.h>
75 #include <vfs/ufs/ufsmount.h>
76 #include <vfs/ufs/ufs_extern.h>
78 #include "ext2_fs_sb.h"
80 #include "ext2_extern.h"
83 static int ext2_makeinode (int mode, struct vnode *, struct vnode **, struct componentname *);
85 static int ext2_fsync (struct vop_fsync_args *);
86 static int ext2_read (struct vop_read_args *);
87 static int ext2_write (struct vop_write_args *);
88 static int ext2_remove (struct vop_remove_args *);
89 static int ext2_link (struct vop_link_args *);
90 static int ext2_rename (struct vop_rename_args *);
91 static int ext2_mkdir (struct vop_mkdir_args *);
92 static int ext2_rmdir (struct vop_rmdir_args *);
93 static int ext2_create (struct vop_create_args *);
94 static int ext2_mknod (struct vop_mknod_args *);
95 static int ext2_symlink (struct vop_symlink_args *);
96 static int ext2_getpages (struct vop_getpages_args *);
97 static int ext2_putpages (struct vop_putpages_args *);
99 /* Global vfs data structures for ufs. */
100 struct vnodeopv_entry_desc ext2_vnodeop_entries[] = {
101 { &vop_default_desc, (vnodeopv_entry_t) ufs_vnoperate },
102 { &vop_fsync_desc, (vnodeopv_entry_t) ext2_fsync },
103 { &vop_inactive_desc, (vnodeopv_entry_t) ext2_inactive },
104 { &vop_lookup_desc, (vnodeopv_entry_t) ext2_lookup },
105 { &vop_read_desc, (vnodeopv_entry_t) ext2_read },
106 { &vop_readdir_desc, (vnodeopv_entry_t) ext2_readdir },
107 { &vop_reallocblks_desc, (vnodeopv_entry_t) ext2_reallocblks },
108 { &vop_write_desc, (vnodeopv_entry_t) ext2_write },
109 { &vop_remove_desc, (vnodeopv_entry_t) ext2_remove },
110 { &vop_link_desc, (vnodeopv_entry_t) ext2_link },
111 { &vop_rename_desc, (vnodeopv_entry_t) ext2_rename },
112 { &vop_mkdir_desc, (vnodeopv_entry_t) ext2_mkdir },
113 { &vop_rmdir_desc, (vnodeopv_entry_t) ext2_rmdir },
114 { &vop_create_desc, (vnodeopv_entry_t) ext2_create },
115 { &vop_mknod_desc, (vnodeopv_entry_t) ext2_mknod },
116 { &vop_symlink_desc, (vnodeopv_entry_t) ext2_symlink },
117 { &vop_getpages_desc, (vnodeopv_entry_t) ext2_getpages },
118 { &vop_putpages_desc, (vnodeopv_entry_t) ext2_putpages },
122 struct vnodeopv_entry_desc ext2_specop_entries[] = {
123 { &vop_default_desc, (vnodeopv_entry_t) ufs_vnoperatespec },
124 { &vop_fsync_desc, (vnodeopv_entry_t) ext2_fsync },
125 { &vop_inactive_desc, (vnodeopv_entry_t) ext2_inactive },
129 struct vnodeopv_entry_desc ext2_fifoop_entries[] = {
130 { &vop_default_desc, (vnodeopv_entry_t) ufs_vnoperatefifo },
131 { &vop_fsync_desc, (vnodeopv_entry_t) ext2_fsync },
132 { &vop_inactive_desc, (vnodeopv_entry_t) ext2_inactive },
136 #include "ext2_readwrite.c"
139 * A virgin directory (no blushing please).
140 * Note that the type and namlen fields are reversed relative to ufs.
141 * Also, we don't use `struct odirtemplate', since it would just cause
142 * endianness problems.
144 static struct dirtemplate mastertemplate = {
145 0, 12, 1, EXT2_FT_DIR, ".",
146 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
148 static struct dirtemplate omastertemplate = {
149 0, 12, 1, EXT2_FT_UNKNOWN, ".",
150 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".."
154 * Create a regular file
156 * ext2_create(struct vnode *a_dvp, struct vnode **a_vpp,
157 * struct componentname *a_cnp, struct vattr *a_vap)
160 ext2_create(struct vop_create_args *ap)
165 ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
166 ap->a_dvp, ap->a_vpp, ap->a_cnp);
173 * Synch an open file.
175 * ext2_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
180 ext2_fsync(struct vop_fsync_args *ap)
182 struct vnode *vp = ap->a_vp;
188 * XXX why is all this fs specific?
192 * Flush all dirty buffers associated with a vnode.
194 ext2_discard_prealloc(VTOI(vp));
198 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
199 nbp = TAILQ_NEXT(bp, b_vnbufs);
200 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
202 if ((bp->b_flags & B_DELWRI) == 0)
203 panic("ext2_fsync: not dirty");
207 * Wait for I/O associated with indirect blocks to complete,
208 * since there is no way to quickly wait for them below.
210 if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT)
216 if (ap->a_waitfor == MNT_WAIT) {
217 while (vp->v_numoutput) {
218 vp->v_flag |= VBWAIT;
219 tsleep(&vp->v_numoutput, 0, "e2fsyn", 0);
222 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
223 vprint("ext2_fsync: dirty", vp);
229 return (UFS_UPDATE(ap->a_vp, ap->a_waitfor == MNT_WAIT));
235 * ext2_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
236 * struct componentname *a_cnp, struct vattr *a_vap)
240 ext2_mknod(struct vop_mknod_args *ap)
242 struct vattr *vap = ap->a_vap;
243 struct vnode **vpp = ap->a_vpp;
248 error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
249 ap->a_dvp, vpp, ap->a_cnp);
253 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
254 if (vap->va_rdev != VNOVAL) {
256 * Want to be able to use this to make badblock
257 * inodes, so don't truncate the dev number.
259 ip->i_rdev = vap->va_rdev;
262 * Remove inode, then reload it through VFS_VGET so it is
263 * checked to see if it is an alias of an existing entry in
266 (*vpp)->v_type = VNON;
267 ino = ip->i_number; /* Save this before vgone() invalidates ip. */
270 error = VFS_VGET(ap->a_dvp->v_mount, ino, vpp);
279 * ext2_remove(struct vnode *a_dvp, struct vnode *a_vp,
280 * struct componentname *a_cnp)
283 ext2_remove(struct vop_remove_args *ap)
286 struct vnode *vp = ap->a_vp;
287 struct vnode *dvp = ap->a_dvp;
291 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
292 (VTOI(dvp)->i_flags & APPEND)) {
296 error = ext2_dirremove(dvp, ap->a_cnp);
299 ip->i_flag |= IN_CHANGE;
308 * ext2_link(struct vnode *a_tdvp, struct vnode *a_vp,
309 * struct componentname *a_cnp)
312 ext2_link(struct vop_link_args *ap)
314 struct vnode *vp = ap->a_vp;
315 struct vnode *tdvp = ap->a_tdvp;
316 struct componentname *cnp = ap->a_cnp;
317 struct thread *td = cnp->cn_td;
321 if (tdvp->v_mount != vp->v_mount) {
325 if (tdvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE, td))) {
329 if ((nlink_t)ip->i_nlink >= LINK_MAX) {
333 if (ip->i_flags & (IMMUTABLE | APPEND)) {
338 ip->i_flag |= IN_CHANGE;
339 error = UFS_UPDATE(vp, 1);
341 error = ext2_direnter(ip, tdvp, cnp);
344 ip->i_flag |= IN_CHANGE;
348 VOP_UNLOCK(vp, 0, td);
354 * Rename system call. fdvp, fvp are ref'd. tvp, tdvp are ref'd and locked.
355 * all vp's are released and must be in an unlocked state on return.
357 * ext2_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
358 * struct componentname *a_fcnp, struct vnode *a_tdvp,
359 * struct vnode *a_tvp, struct componentname *a_tcnp)
362 ext2_rename(struct vop_rename_args *ap)
364 struct vnode *tvp = ap->a_tvp;
365 struct vnode *tdvp = ap->a_tdvp;
366 struct vnode *fvp = ap->a_fvp;
367 struct vnode *fdvp = ap->a_fdvp;
368 struct componentname *tcnp = ap->a_tcnp;
369 struct componentname *fcnp = ap->a_fcnp;
370 struct thread *td = fcnp->cn_td;
371 struct inode *ip, *xp, *dp;
372 struct dirtemplate dirbuf;
373 int doingdirectory = 0, oldparent = 0, newparent = 0;
378 * Check for cross-device rename.
380 if ((fvp->v_mount != tdvp->v_mount) ||
381 (tvp && (fvp->v_mount != tvp->v_mount)) ||
396 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
397 (VTOI(tdvp)->i_flags & APPEND))) {
403 * Renaming a file to itself has no effect. The upper layers should
404 * not call us in that case. Temporarily just warn if they do.
411 if ((error = vn_lock(fvp, LK_EXCLUSIVE, td)) != 0)
415 * fvp, tvp, tdvp locked. fdvp not locked but note that fdvp may
420 if (ip->i_nlink >= LINK_MAX) {
421 VOP_UNLOCK(fvp, 0, td);
425 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
426 || (dp->i_flags & APPEND)) {
427 VOP_UNLOCK(fvp, 0, td);
431 if ((ip->i_mode & IFMT) == IFDIR) {
433 * Avoid ".", "..", and aliases of "." for obvious reasons.
435 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
436 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & CNP_ISDOTDOT ||
437 (ip->i_flag & IN_RENAME)) {
438 VOP_UNLOCK(fvp, 0, td);
442 ip->i_flag |= IN_RENAME;
443 oldparent = dp->i_number;
448 * tvp is non-NULL if the target exists. fvp is still locked but
449 * we will unlock it soon. The 'bad' goto target requires dp and
450 * xp to be correctly assigned.
459 * 1) Bump link count while we're moving stuff
460 * around. If we crash somewhere before
461 * completing our work, the link count
462 * may be wrong, but correctable.
465 ip->i_flag |= IN_CHANGE;
466 if ((error = UFS_UPDATE(fvp, 1)) != 0) {
467 VOP_UNLOCK(fvp, 0, td);
472 * If ".." must be changed (ie the directory gets a new
473 * parent) then the source directory must not be in the
474 * directory heirarchy above the target, as this would
475 * orphan everything below the source directory. Also
476 * the user must have write permission in the source so
477 * as to be able to change "..". We must repeat the call
478 * to namei, as the parent directory is unlocked by the
479 * call to checkpath().
481 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td);
482 VOP_UNLOCK(fvp, 0, td);
485 * tvp (if not NULL) and tdvp are locked. fvp and fdvp are not.
486 * dp and xp are set according to tdvp and tvp.
488 if (oldparent != dp->i_number)
489 newparent = dp->i_number;
490 if (doingdirectory && newparent) {
491 if (error) /* write access check above */
495 * Prepare for relookup, get rid of xp
503 * checkpath vput()'s tdvp (VTOI(dp)) on return no matter what,
504 * get an extra ref so we wind up with just an unlocked, ref'd
505 * tdvp. The 'out' target skips xp and tdvp cleanups. Our
506 * tdvp is now unlocked so we have to clean it up ourselves.
509 error = ext2_checkpath(ip, dp, tcnp->cn_cred);
510 tcnp->cn_flags |= CNP_PDIRUNLOCK;
516 * relookup no longer messes with the ref count. An unlocked
517 * tdvp must be passed and if no error occurs a locked tdvp
518 * will be returned. We have to use the out target again.
520 error = relookup(tdvp, &tvp, tcnp);
522 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
530 * tdvp is locked at this point. in the RENAME case tvp may
531 * be NULL without an error, assign xp accordingly. The
532 * 'bad' target can be used again after this.
539 * 2) If target doesn't exist, link the target
540 * to the source and unlink the source.
541 * Otherwise, rewrite the target directory
542 * entry to reference the source inode and
543 * expunge the original entry's existence.
545 * tdvp and tvp are cleaned up by this code. tvp is only good if
549 if (dp->i_dev != ip->i_dev)
550 panic("ufs_rename: EXDEV");
552 * Account for ".." in new directory.
553 * When source and destination have the same
554 * parent we don't fool with the link count.
556 if (doingdirectory && newparent) {
557 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
562 dp->i_flag |= IN_CHANGE;
563 error = UFS_UPDATE(tdvp, 1);
567 error = ext2_direnter(ip, tdvp, tcnp);
569 if (doingdirectory && newparent) {
571 dp->i_flag |= IN_CHANGE;
572 (void)UFS_UPDATE(tdvp, 1);
578 * manual cleanup, we can't use the bad or out target after
583 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
584 panic("ufs_rename: EXDEV");
586 * Short circuit rename(foo, foo).
588 if (xp->i_number == ip->i_number)
589 panic("ufs_rename: same file");
591 * If the parent directory is "sticky", then the user must
592 * own the parent directory, or the destination of the rename,
593 * otherwise the destination may not be changed (except by
594 * root). This implements append-only directories.
596 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
597 tcnp->cn_cred->cr_uid != dp->i_uid &&
598 xp->i_uid != tcnp->cn_cred->cr_uid) {
603 * Target must be empty if a directory and have no links
604 * to it. Also, ensure source and target are compatible
605 * (both directories, or both not directories).
607 if ((xp->i_mode&IFMT) == IFDIR) {
608 if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) ||
613 if (!doingdirectory) {
617 } else if (doingdirectory) {
621 error = ext2_dirrewrite(dp, ip, tcnp);
625 * If the target directory is in the same
626 * directory as the source directory,
627 * decrement the link count on the parent
628 * of the target directory.
630 if (doingdirectory && !newparent) {
632 dp->i_flag |= IN_CHANGE;
636 * manual cleanup, we can't use the bad or out target after
642 * Adjust the link count of the target to
643 * reflect the dirrewrite above. If this is
644 * a directory it is empty and there are
645 * no links to it, so we can squash the inode and
646 * any space associated with it. We disallowed
647 * renaming over top of a directory with links to
648 * it above, as the remaining link would point to
649 * a directory without "." or ".." entries.
652 if (doingdirectory) {
653 if (--xp->i_nlink != 0)
654 panic("ufs_rename: linked directory");
655 error = UFS_TRUNCATE(tvp, (off_t)0, IO_SYNC,
656 tcnp->cn_cred, tcnp->cn_td);
658 xp->i_flag |= IN_CHANGE;
664 * tvp and tdvp have been cleaned up. The bad and out targets may
665 * not be used. fvp and fdvp are ref'd but not locked. ip
666 * still represents the old fvp and ip->i_flag may still have IN_RENAME
667 * set (if doingdirectory).
671 * 3) Unlink the source.
673 * fdvp is locked and ref'd. ap->a_fvp holds the old lookup unlocked
674 * and ref'd, fvp will hold the new lookup locked and ref'd.
676 * After the relookup ap->a_fvp must be released as part of our
677 * cleanup, not just fdvp and fvp. And, on success, fdvp and
678 * fvp will be locked so the bad and out targets cannot be used.
680 fcnp->cn_flags &= ~CNP_MODMASK;
681 fcnp->cn_flags |= CNP_LOCKPARENT;
682 KKASSERT(fcnp->cn_flags & CNP_PDIRUNLOCK);
683 error = relookup(fdvp, &fvp, fcnp);
686 * From name has disappeared.
689 panic("ufs_rename: lost dir entry");
690 /* ip->i_flag only sets IN_RENAME if doingdirectory */
692 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
698 KKASSERT((fcnp->cn_flags & CNP_PDIRUNLOCK) == 0);
701 * This case shouldn't occur
705 * From name has disappeared.
708 panic("ufs_rename: lost dir entry");
709 /* ip->i_flag only sets IN_RENAME if doingdirectory */
717 * fvp and fdvp are both ref'd and locked.
723 * Ensure that the directory entry still exists and has not
724 * changed while the new name has been entered. If the source is
725 * a file then the entry may have been unlinked or renamed. In
726 * either case there is no further work to be done. If the source
727 * is a directory then it cannot have been rmdir'ed; its link
728 * count of three would cause a rmdir to fail with ENOTEMPTY.
729 * The IN_RENAME flag ensures that it cannot be moved by another
734 panic("ufs_rename: lost dir entry");
735 /* ip->i_flag only sets IN_RENAME if doingdirectory */
738 * If the source is a directory with a
739 * new parent, the link count of the old
740 * parent directory must be decremented
741 * and ".." set to point to the new parent.
743 if (doingdirectory && newparent) {
745 dp->i_flag |= IN_CHANGE;
746 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf,
747 sizeof (struct dirtemplate), (off_t)0,
748 UIO_SYSSPACE, IO_NODELOCKED,
749 tcnp->cn_cred, (int *)0, NULL);
751 /* Like ufs little-endian: */
752 namlen = dirbuf.dotdot_type;
754 dirbuf.dotdot_name[0] != '.' ||
755 dirbuf.dotdot_name[1] != '.') {
756 ufs_dirbad(xp, (doff_t)12,
757 "rename: mangled dir");
759 dirbuf.dotdot_ino = newparent;
760 (void) vn_rdwr(UIO_WRITE, fvp,
762 sizeof (struct dirtemplate),
763 (off_t)0, UIO_SYSSPACE,
764 IO_NODELOCKED|IO_SYNC,
765 tcnp->cn_cred, (int *)0,
770 error = ext2_dirremove(fdvp, fcnp);
773 xp->i_flag |= IN_CHANGE;
775 xp->i_flag &= ~IN_RENAME;
789 ip->i_flag &= ~IN_RENAME;
790 if (vn_lock(fvp, LK_EXCLUSIVE, td) == 0) {
792 ip->i_flag |= IN_CHANGE;
793 ip->i_flag &= ~IN_RENAME;
804 * ext2_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
805 * struct componentname *a_cnp, struct vattr *a_vap)
808 ext2_mkdir(struct vop_mkdir_args *ap)
810 struct vnode *dvp = ap->a_dvp;
811 struct vattr *vap = ap->a_vap;
812 struct componentname *cnp = ap->a_cnp;
813 struct inode *ip, *dp;
815 struct dirtemplate dirtemplate, *dtp;
819 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
823 dmode = vap->va_mode & 0777;
826 * Must simulate part of ext2_makeinode here to acquire the inode,
827 * but not have it entered in the parent directory. The entry is
828 * made later after writing "." and ".." entries.
830 error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, &tvp);
834 ip->i_gid = dp->i_gid;
838 struct ucred ucred, *ucp;
842 * if we are hacking owners here, (only do this where told to)
843 * and we are not giving it TOO root, (would subvert quotas)
844 * then go ahead and give it to the other user.
845 * The new directory also inherits the SUID bit.
846 * If user's UID and dir UID are the same,
847 * 'give it away' so that the SUID is still forced on.
849 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
850 (dp->i_mode & ISUID) && dp->i_uid) {
852 ip->i_uid = dp->i_uid;
854 if (dp->i_uid != cnp->cn_cred->cr_uid) {
856 * make sure the correct user gets charged
858 * Make a dummy credential for the victim.
859 * XXX This seems to never be accessed out of
860 * our context so a stack variable is ok.
863 ucred.cr_uid = ip->i_uid;
864 ucred.cr_ngroups = 1;
865 ucred.cr_groups[0] = dp->i_gid;
870 ip->i_uid = cnp->cn_cred->cr_uid;
873 if ((error = getinoquota(ip)) ||
874 (error = chkiq(ip, 1, ucp, 0))) {
875 UFS_VFREE(tvp, ip->i_number, dmode);
882 ip->i_uid = cnp->cn_cred->cr_uid;
884 if ((error = getinoquota(ip)) ||
885 (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
886 UFS_VFREE(tvp, ip->i_number, dmode);
892 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
894 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
896 if (cnp->cn_flags & CNP_ISWHITEOUT)
897 ip->i_flags |= UF_OPAQUE;
898 error = UFS_UPDATE(tvp, 1);
901 * Bump link count in parent directory
902 * to reflect work done below. Should
903 * be done before reference is created
904 * so reparation is possible if we crash.
907 dp->i_flag |= IN_CHANGE;
908 error = UFS_UPDATE(dvp, 1);
912 /* Initialize directory with "." and ".." from static template. */
913 if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs->s_es,
914 EXT2_FEATURE_INCOMPAT_FILETYPE))
915 dtp = &mastertemplate;
917 dtp = &omastertemplate;
919 dirtemplate.dot_ino = ip->i_number;
920 dirtemplate.dotdot_ino = dp->i_number;
921 /* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE
922 * so let's just redefine it - for this function only
925 #define DIRBLKSIZ VTOI(dvp)->i_e2fs->s_blocksize
926 dirtemplate.dotdot_reclen = DIRBLKSIZ - 12;
927 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate,
928 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
929 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, NULL);
932 dp->i_flag |= IN_CHANGE;
935 if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
936 panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */
938 ip->i_size = DIRBLKSIZ;
939 ip->i_flag |= IN_CHANGE;
942 /* Directory set up, now install its entry in the parent directory. */
943 error = ext2_direnter(ip, dvp, cnp);
946 dp->i_flag |= IN_CHANGE;
950 * No need to do an explicit VOP_TRUNCATE here, vrele will do this
951 * for us because we set the link count to 0.
955 ip->i_flag |= IN_CHANGE;
962 #define DIRBLKSIZ DEV_BSIZE
968 * ext2_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
969 * struct componentname *a_cnp)
972 ext2_rmdir(struct vop_rmdir_args *ap)
974 struct vnode *vp = ap->a_vp;
975 struct vnode *dvp = ap->a_dvp;
976 struct componentname *cnp = ap->a_cnp;
977 struct thread *td = cnp->cn_td;
978 struct inode *ip, *dp;
985 * Verify the directory is empty (and valid).
986 * (Rmdir ".." won't be valid since
987 * ".." will contain a reference to
988 * the current directory and thus be
992 if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) {
996 if ((dp->i_flags & APPEND)
997 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1002 * Delete reference to directory before purging
1003 * inode. If we crash in between, the directory
1004 * will be reattached to lost+found,
1006 error = ext2_dirremove(dvp, cnp);
1010 dp->i_flag |= IN_CHANGE;
1011 VOP_UNLOCK(dvp, 0, td);
1013 * Truncate inode. The only stuff left
1014 * in the directory is "." and "..". The
1015 * "." reference is inconsequential since
1016 * we're quashing it. The ".." reference
1017 * has already been adjusted above. We've
1018 * removed the "." reference and the reference
1019 * in the parent directory, but there may be
1020 * other hard links so decrement by 2 and
1021 * worry about them later.
1024 error = UFS_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, td);
1025 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
1031 * symlink -- make a symbolic link
1033 * ext2_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1034 * struct componentname *a_cnp, struct vattr *a_vap,
1038 ext2_symlink(struct vop_symlink_args *ap)
1040 struct vnode *vp, **vpp = ap->a_vpp;
1044 error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1049 len = strlen(ap->a_target);
1050 if (len < vp->v_mount->mnt_maxsymlinklen) {
1052 bcopy(ap->a_target, (char *)ip->i_shortlink, len);
1054 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1056 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
1057 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0,
1065 * Allocate a new inode.
1068 ext2_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
1069 struct componentname *cnp)
1071 struct inode *ip, *pdir;
1077 if ((mode & IFMT) == 0)
1080 error = UFS_VALLOC(dvp, mode, cnp->cn_cred, &tvp);
1085 ip->i_gid = pdir->i_gid;
1089 struct ucred ucred, *ucp;
1094 * not the owner of the directory,
1095 * and we are hacking owners here, (only do this where told to)
1096 * and we are not giving it TOO root, (would subvert quotas)
1097 * then go ahead and give it to the other user.
1098 * Note that this drops off the execute bits for security.
1100 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1101 (pdir->i_mode & ISUID) &&
1102 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
1103 ip->i_uid = pdir->i_uid;
1107 * make sure the correct user gets charged
1109 * Quickly knock up a dummy credential for the victim.
1110 * XXX This seems to never be accessed out of our
1111 * context so a stack variable is ok.
1114 ucred.cr_uid = ip->i_uid;
1115 ucred.cr_ngroups = 1;
1116 ucred.cr_groups[0] = pdir->i_gid;
1120 ip->i_uid = cnp->cn_cred->cr_uid;
1124 if ((error = getinoquota(ip)) ||
1125 (error = chkiq(ip, 1, ucp, 0))) {
1126 UFS_VFREE(tvp, ip->i_number, mode);
1133 ip->i_uid = cnp->cn_cred->cr_uid;
1135 if ((error = getinoquota(ip)) ||
1136 (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
1137 UFS_VFREE(tvp, ip->i_number, mode);
1143 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1145 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
1147 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
1148 suser_cred(cnp->cn_cred, PRISON_ROOT))
1149 ip->i_mode &= ~ISGID;
1151 if (cnp->cn_flags & CNP_ISWHITEOUT)
1152 ip->i_flags |= UF_OPAQUE;
1155 * Make sure inode goes to disk before directory entry.
1157 error = UFS_UPDATE(tvp, 1);
1160 error = ext2_direnter(ip, dvp, cnp);
1169 * Write error occurred trying to update the inode
1170 * or the directory so must deallocate the inode.
1173 ip->i_flag |= IN_CHANGE;
1181 * XXX By default, wimp out... note that a_offset is ignored (and always
1185 ext2_getpages(struct vop_getpages_args *ap)
1187 return (vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1194 * XXX By default, wimp out... note that a_offset is ignored (and always
1198 ext2_putpages(struct vop_putpages_args *ap)
1200 return (vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1201 ap->a_sync, ap->a_rtvals));