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
9 * The Regents of the University of California. All rights reserved.
10 * (c) UNIX System Laboratories, Inc.
11 * All or some portions of this file are derived from material licensed
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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 1.17 2004/11/12 00:09:30 dillon 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, (void *) ufs_vnoperate },
102 { &vop_fsync_desc, (void *) ext2_fsync },
103 { &vop_inactive_desc, (void *) ext2_inactive },
104 { &vop_lookup_desc, (void *) ext2_lookup },
105 { &vop_read_desc, (void *) ext2_read },
106 { &vop_readdir_desc, (void *) ext2_readdir },
107 { &vop_reallocblks_desc, (void *) ext2_reallocblks },
108 { &vop_write_desc, (void *) ext2_write },
109 { &vop_remove_desc, (void *) ext2_remove },
110 { &vop_link_desc, (void *) ext2_link },
111 { &vop_rename_desc, (void *) ext2_rename },
112 { &vop_mkdir_desc, (void *) ext2_mkdir },
113 { &vop_rmdir_desc, (void *) ext2_rmdir },
114 { &vop_create_desc, (void *) ext2_create },
115 { &vop_mknod_desc, (void *) ext2_mknod },
116 { &vop_symlink_desc, (void *) ext2_symlink },
117 { &vop_getpages_desc, (void *) ext2_getpages },
118 { &vop_putpages_desc, (void *) ext2_putpages },
122 struct vnodeopv_entry_desc ext2_specop_entries[] = {
123 { &vop_default_desc, (void *) ufs_vnoperatespec },
124 { &vop_fsync_desc, (void *) ext2_fsync },
125 { &vop_inactive_desc, (void *) ext2_inactive },
129 struct vnodeopv_entry_desc ext2_fifoop_entries[] = {
130 { &vop_default_desc, (void *) ufs_vnoperatefifo },
131 { &vop_fsync_desc, (void *) ext2_fsync },
132 { &vop_inactive_desc, (void *) 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);
515 * relookup no longer messes with the ref count. An unlocked
516 * tdvp must be passed and if no error occurs a locked tdvp
517 * will be returned. We have to use the out target again.
519 error = relookup(tdvp, &tvp, tcnp);
521 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
529 * tdvp is locked at this point. in the RENAME case tvp may
530 * be NULL without an error, assign xp accordingly. The
531 * 'bad' target can be used again after this.
538 * 2) If target doesn't exist, link the target
539 * to the source and unlink the source.
540 * Otherwise, rewrite the target directory
541 * entry to reference the source inode and
542 * expunge the original entry's existence.
544 * tdvp and tvp are cleaned up by this code. tvp is only good if
548 if (dp->i_dev != ip->i_dev)
549 panic("ufs_rename: EXDEV");
551 * Account for ".." in new directory.
552 * When source and destination have the same
553 * parent we don't fool with the link count.
555 if (doingdirectory && newparent) {
556 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
561 dp->i_flag |= IN_CHANGE;
562 error = UFS_UPDATE(tdvp, 1);
566 error = ext2_direnter(ip, tdvp, tcnp);
568 if (doingdirectory && newparent) {
570 dp->i_flag |= IN_CHANGE;
571 (void)UFS_UPDATE(tdvp, 1);
577 * manual cleanup, we can't use the bad or out target after
582 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
583 panic("ufs_rename: EXDEV");
585 * Short circuit rename(foo, foo).
587 if (xp->i_number == ip->i_number)
588 panic("ufs_rename: same file");
590 * If the parent directory is "sticky", then the user must
591 * own the parent directory, or the destination of the rename,
592 * otherwise the destination may not be changed (except by
593 * root). This implements append-only directories.
595 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
596 tcnp->cn_cred->cr_uid != dp->i_uid &&
597 xp->i_uid != tcnp->cn_cred->cr_uid) {
602 * Target must be empty if a directory and have no links
603 * to it. Also, ensure source and target are compatible
604 * (both directories, or both not directories).
606 if ((xp->i_mode&IFMT) == IFDIR) {
607 if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) ||
612 if (!doingdirectory) {
616 } else if (doingdirectory) {
620 error = ext2_dirrewrite(dp, ip, tcnp);
624 * If the target directory is in the same
625 * directory as the source directory,
626 * decrement the link count on the parent
627 * of the target directory.
629 if (doingdirectory && !newparent) {
631 dp->i_flag |= IN_CHANGE;
635 * manual cleanup, we can't use the bad or out target after
641 * Adjust the link count of the target to
642 * reflect the dirrewrite above. If this is
643 * a directory it is empty and there are
644 * no links to it, so we can squash the inode and
645 * any space associated with it. We disallowed
646 * renaming over top of a directory with links to
647 * it above, as the remaining link would point to
648 * a directory without "." or ".." entries.
651 if (doingdirectory) {
652 if (--xp->i_nlink != 0)
653 panic("ufs_rename: linked directory");
654 error = UFS_TRUNCATE(tvp, (off_t)0, IO_SYNC,
655 tcnp->cn_cred, tcnp->cn_td);
657 xp->i_flag |= IN_CHANGE;
663 * tvp and tdvp have been cleaned up. The bad and out targets may
664 * not be used. fvp and fdvp are ref'd but not locked. ip
665 * still represents the old fvp and ip->i_flag may still have IN_RENAME
666 * set (if doingdirectory).
670 * 3) Unlink the source.
672 * fdvp is locked and ref'd. ap->a_fvp holds the old lookup unlocked
673 * and ref'd, fvp will hold the new lookup locked and ref'd.
675 * After the relookup ap->a_fvp must be released as part of our
676 * cleanup, not just fdvp and fvp. And, on success, fdvp and
677 * fvp will be locked so the bad and out targets cannot be used.
679 fcnp->cn_flags &= ~CNP_MODMASK;
680 fcnp->cn_flags |= CNP_LOCKPARENT;
681 KKASSERT(fcnp->cn_flags & CNP_PDIRUNLOCK);
682 error = relookup(fdvp, &fvp, fcnp);
685 * From name has disappeared.
688 panic("ufs_rename: lost dir entry");
689 /* ip->i_flag only sets IN_RENAME if doingdirectory */
691 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
697 KKASSERT((fcnp->cn_flags & CNP_PDIRUNLOCK) == 0);
700 * This case shouldn't occur
704 * From name has disappeared.
707 panic("ufs_rename: lost dir entry");
708 /* ip->i_flag only sets IN_RENAME if doingdirectory */
716 * fvp and fdvp are both ref'd and locked.
722 * Ensure that the directory entry still exists and has not
723 * changed while the new name has been entered. If the source is
724 * a file then the entry may have been unlinked or renamed. In
725 * either case there is no further work to be done. If the source
726 * is a directory then it cannot have been rmdir'ed; its link
727 * count of three would cause a rmdir to fail with ENOTEMPTY.
728 * The IN_RENAME flag ensures that it cannot be moved by another
733 panic("ufs_rename: lost dir entry");
734 /* ip->i_flag only sets IN_RENAME if doingdirectory */
737 * If the source is a directory with a
738 * new parent, the link count of the old
739 * parent directory must be decremented
740 * and ".." set to point to the new parent.
742 if (doingdirectory && newparent) {
744 dp->i_flag |= IN_CHANGE;
745 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf,
746 sizeof (struct dirtemplate), (off_t)0,
747 UIO_SYSSPACE, IO_NODELOCKED,
748 tcnp->cn_cred, (int *)0, NULL);
750 /* Like ufs little-endian: */
751 namlen = dirbuf.dotdot_type;
753 dirbuf.dotdot_name[0] != '.' ||
754 dirbuf.dotdot_name[1] != '.') {
755 ufs_dirbad(xp, (doff_t)12,
756 "rename: mangled dir");
758 dirbuf.dotdot_ino = newparent;
759 (void) vn_rdwr(UIO_WRITE, fvp,
761 sizeof (struct dirtemplate),
762 (off_t)0, UIO_SYSSPACE,
763 IO_NODELOCKED|IO_SYNC,
764 tcnp->cn_cred, (int *)0,
769 error = ext2_dirremove(fdvp, fcnp);
772 xp->i_flag |= IN_CHANGE;
774 xp->i_flag &= ~IN_RENAME;
788 ip->i_flag &= ~IN_RENAME;
789 if (vn_lock(fvp, LK_EXCLUSIVE, td) == 0) {
791 ip->i_flag |= IN_CHANGE;
792 ip->i_flag &= ~IN_RENAME;
803 * ext2_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
804 * struct componentname *a_cnp, struct vattr *a_vap)
807 ext2_mkdir(struct vop_mkdir_args *ap)
809 struct vnode *dvp = ap->a_dvp;
810 struct vattr *vap = ap->a_vap;
811 struct componentname *cnp = ap->a_cnp;
812 struct inode *ip, *dp;
814 struct dirtemplate dirtemplate, *dtp;
818 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
822 dmode = vap->va_mode & 0777;
825 * Must simulate part of ext2_makeinode here to acquire the inode,
826 * but not have it entered in the parent directory. The entry is
827 * made later after writing "." and ".." entries.
829 error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, &tvp);
833 ip->i_gid = dp->i_gid;
837 struct ucred ucred, *ucp;
841 * if we are hacking owners here, (only do this where told to)
842 * and we are not giving it TOO root, (would subvert quotas)
843 * then go ahead and give it to the other user.
844 * The new directory also inherits the SUID bit.
845 * If user's UID and dir UID are the same,
846 * 'give it away' so that the SUID is still forced on.
848 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
849 (dp->i_mode & ISUID) && dp->i_uid) {
851 ip->i_uid = dp->i_uid;
853 if (dp->i_uid != cnp->cn_cred->cr_uid) {
855 * make sure the correct user gets charged
857 * Make a dummy credential for the victim.
858 * XXX This seems to never be accessed out of
859 * our context so a stack variable is ok.
862 ucred.cr_uid = ip->i_uid;
863 ucred.cr_ngroups = 1;
864 ucred.cr_groups[0] = dp->i_gid;
869 ip->i_uid = cnp->cn_cred->cr_uid;
872 if ((error = getinoquota(ip)) ||
873 (error = chkiq(ip, 1, ucp, 0))) {
874 UFS_VFREE(tvp, ip->i_number, dmode);
881 ip->i_uid = cnp->cn_cred->cr_uid;
883 if ((error = getinoquota(ip)) ||
884 (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
885 UFS_VFREE(tvp, ip->i_number, dmode);
891 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
893 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
895 if (cnp->cn_flags & CNP_ISWHITEOUT)
896 ip->i_flags |= UF_OPAQUE;
897 error = UFS_UPDATE(tvp, 1);
900 * Bump link count in parent directory
901 * to reflect work done below. Should
902 * be done before reference is created
903 * so reparation is possible if we crash.
906 dp->i_flag |= IN_CHANGE;
907 error = UFS_UPDATE(dvp, 1);
911 /* Initialize directory with "." and ".." from static template. */
912 if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs->s_es,
913 EXT2_FEATURE_INCOMPAT_FILETYPE))
914 dtp = &mastertemplate;
916 dtp = &omastertemplate;
918 dirtemplate.dot_ino = ip->i_number;
919 dirtemplate.dotdot_ino = dp->i_number;
920 /* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE
921 * so let's just redefine it - for this function only
924 #define DIRBLKSIZ VTOI(dvp)->i_e2fs->s_blocksize
925 dirtemplate.dotdot_reclen = DIRBLKSIZ - 12;
926 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate,
927 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
928 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, NULL);
931 dp->i_flag |= IN_CHANGE;
934 if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
935 panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */
937 ip->i_size = DIRBLKSIZ;
938 ip->i_flag |= IN_CHANGE;
941 /* Directory set up, now install its entry in the parent directory. */
942 error = ext2_direnter(ip, dvp, cnp);
945 dp->i_flag |= IN_CHANGE;
949 * No need to do an explicit VOP_TRUNCATE here, vrele will do this
950 * for us because we set the link count to 0.
954 ip->i_flag |= IN_CHANGE;
961 #define DIRBLKSIZ DEV_BSIZE
967 * ext2_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
968 * struct componentname *a_cnp)
971 ext2_rmdir(struct vop_rmdir_args *ap)
973 struct vnode *vp = ap->a_vp;
974 struct vnode *dvp = ap->a_dvp;
975 struct componentname *cnp = ap->a_cnp;
976 struct thread *td = cnp->cn_td;
977 struct inode *ip, *dp;
984 * Verify the directory is empty (and valid).
985 * (Rmdir ".." won't be valid since
986 * ".." will contain a reference to
987 * the current directory and thus be
991 if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) {
995 if ((dp->i_flags & APPEND)
996 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1001 * Delete reference to directory before purging
1002 * inode. If we crash in between, the directory
1003 * will be reattached to lost+found,
1005 error = ext2_dirremove(dvp, cnp);
1009 dp->i_flag |= IN_CHANGE;
1010 VOP_UNLOCK(dvp, 0, td);
1012 * Truncate inode. The only stuff left
1013 * in the directory is "." and "..". The
1014 * "." reference is inconsequential since
1015 * we're quashing it. The ".." reference
1016 * has already been adjusted above. We've
1017 * removed the "." reference and the reference
1018 * in the parent directory, but there may be
1019 * other hard links so decrement by 2 and
1020 * worry about them later.
1023 error = UFS_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, td);
1024 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
1030 * symlink -- make a symbolic link
1032 * ext2_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1033 * struct componentname *a_cnp, struct vattr *a_vap,
1037 ext2_symlink(struct vop_symlink_args *ap)
1039 struct vnode *vp, **vpp = ap->a_vpp;
1043 error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1048 len = strlen(ap->a_target);
1049 if (len < vp->v_mount->mnt_maxsymlinklen) {
1051 bcopy(ap->a_target, (char *)ip->i_shortlink, len);
1053 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1055 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
1056 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0,
1064 * Allocate a new inode.
1067 ext2_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
1068 struct componentname *cnp)
1070 struct inode *ip, *pdir;
1076 if ((mode & IFMT) == 0)
1079 error = UFS_VALLOC(dvp, mode, cnp->cn_cred, &tvp);
1084 ip->i_gid = pdir->i_gid;
1088 struct ucred ucred, *ucp;
1093 * not the owner of the directory,
1094 * and we are hacking owners here, (only do this where told to)
1095 * and we are not giving it TOO root, (would subvert quotas)
1096 * then go ahead and give it to the other user.
1097 * Note that this drops off the execute bits for security.
1099 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1100 (pdir->i_mode & ISUID) &&
1101 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
1102 ip->i_uid = pdir->i_uid;
1106 * make sure the correct user gets charged
1108 * Quickly knock up a dummy credential for the victim.
1109 * XXX This seems to never be accessed out of our
1110 * context so a stack variable is ok.
1113 ucred.cr_uid = ip->i_uid;
1114 ucred.cr_ngroups = 1;
1115 ucred.cr_groups[0] = pdir->i_gid;
1119 ip->i_uid = cnp->cn_cred->cr_uid;
1123 if ((error = getinoquota(ip)) ||
1124 (error = chkiq(ip, 1, ucp, 0))) {
1125 UFS_VFREE(tvp, ip->i_number, mode);
1132 ip->i_uid = cnp->cn_cred->cr_uid;
1134 if ((error = getinoquota(ip)) ||
1135 (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
1136 UFS_VFREE(tvp, ip->i_number, mode);
1142 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1144 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
1146 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
1147 suser_cred(cnp->cn_cred, PRISON_ROOT))
1148 ip->i_mode &= ~ISGID;
1150 if (cnp->cn_flags & CNP_ISWHITEOUT)
1151 ip->i_flags |= UF_OPAQUE;
1154 * Make sure inode goes to disk before directory entry.
1156 error = UFS_UPDATE(tvp, 1);
1159 error = ext2_direnter(ip, dvp, cnp);
1168 * Write error occurred trying to update the inode
1169 * or the directory so must deallocate the inode.
1172 ip->i_flag |= IN_CHANGE;
1180 * XXX By default, wimp out... note that a_offset is ignored (and always
1184 ext2_getpages(struct vop_getpages_args *ap)
1186 return (vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1193 * XXX By default, wimp out... note that a_offset is ignored (and always
1197 ext2_putpages(struct vop_putpages_args *ap)
1199 return (vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1200 ap->a_sync, ap->a_rtvals));