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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13 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
14 * the permission of UNIX System Laboratories, Inc.
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20 * notice, this list of conditions and the following disclaimer.
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26 * This product includes software developed by the University of
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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 1.43 2008/06/19 23:27:39 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>
58 #include <sys/fcntl.h>
63 #include <sys/mount.h>
65 #include <sys/vnode.h>
66 #include <sys/dirent.h>
67 #include <sys/lockf.h>
68 #include <sys/event.h>
72 #include <sys/namei.h>
73 #include <sys/signalvar.h>
74 #include <sys/unistd.h>
77 #include <vm/vm_extern.h>
78 #include <vm/vm_zone.h>
79 #include <vm/vnode_pager.h>
82 #include <sys/thread2.h>
84 #include <vfs/fifofs/fifo.h>
89 #include "ext2mount.h"
90 #include "ext2_fs_sb.h"
92 #include "ext2_extern.h"
95 static int ext2_access (struct vop_access_args *);
96 static int ext2_advlock (struct vop_advlock_args *);
97 static int ext2_chmod (struct vnode *, int, struct ucred *);
98 static int ext2_chown (struct vnode *, uid_t, gid_t, struct ucred *);
99 static int ext2_close (struct vop_close_args *);
100 static int ext2_getattr (struct vop_getattr_args *);
101 static int ext2_makeinode (int mode, struct vnode *, struct vnode **, struct componentname *);
102 static int ext2_mmap (struct vop_mmap_args *);
103 static int ext2_open (struct vop_open_args *);
104 static int ext2_pathconf (struct vop_pathconf_args *);
105 static int ext2_print (struct vop_print_args *);
106 static int ext2_readlink (struct vop_readlink_args *);
107 static int ext2_setattr (struct vop_setattr_args *);
108 static int ext2_strategy (struct vop_strategy_args *);
109 static int ext2_whiteout (struct vop_old_whiteout_args *);
110 static int filt_ext2read (struct knote *kn, long hint);
111 static int filt_ext2write (struct knote *kn, long hint);
112 static int filt_ext2vnode (struct knote *kn, long hint);
113 static void filt_ext2detach (struct knote *kn);
114 static int ext2_kqfilter (struct vop_kqfilter_args *ap);
115 static int ext2fifo_close (struct vop_close_args *);
116 static int ext2fifo_kqfilter (struct vop_kqfilter_args *);
117 static int ext2fifo_read (struct vop_read_args *);
118 static int ext2fifo_write (struct vop_write_args *);
120 static int ext2_fsync (struct vop_fsync_args *);
121 static int ext2_read (struct vop_read_args *);
122 static int ext2_write (struct vop_write_args *);
123 static int ext2_remove (struct vop_old_remove_args *);
124 static int ext2_link (struct vop_old_link_args *);
125 static int ext2_rename (struct vop_old_rename_args *);
126 static int ext2_mkdir (struct vop_old_mkdir_args *);
127 static int ext2_rmdir (struct vop_old_rmdir_args *);
128 static int ext2_create (struct vop_old_create_args *);
129 static int ext2_mknod (struct vop_old_mknod_args *);
130 static int ext2_symlink (struct vop_old_symlink_args *);
131 static int ext2_getpages (struct vop_getpages_args *);
133 #include "ext2_readwrite.c"
139 #define SETHIGH(q, h) { \
142 tmp.val[_QUAD_HIGHWORD] = (h); \
145 #define SETLOW(q, l) { \
148 tmp.val[_QUAD_LOWWORD] = (l); \
151 #define VN_KNOTE(vp, b) \
152 KNOTE(&vp->v_pollinfo.vpi_selinfo.si_note, (b))
154 #define OFSFMT(vp) ((vp)->v_mount->mnt_maxsymlinklen <= 0)
157 * A virgin directory (no blushing please).
158 * Note that the type and namlen fields are reversed relative to ufs.
159 * Also, we don't use `struct odirtemplate', since it would just cause
160 * endianness problems.
162 static struct dirtemplate ext2_mastertemplate = {
163 0, 12, 1, EXT2_FT_DIR, ".",
164 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
166 static struct dirtemplate ext2_omastertemplate = {
167 0, 12, 1, EXT2_FT_UNKNOWN, ".",
168 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".."
172 * Create a regular file
174 * ext2_create(struct vnode *a_dvp, struct vnode **a_vpp,
175 * struct componentname *a_cnp, struct vattr *a_vap)
178 ext2_create(struct vop_old_create_args *ap)
183 ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
184 ap->a_dvp, ap->a_vpp, ap->a_cnp);
191 * Synch an open file.
193 * ext2_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
198 static int ext2_fsync_bp(struct buf *bp, void *data);
200 struct ext2_fsync_bp_info {
206 ext2_fsync(struct vop_fsync_args *ap)
208 struct ext2_fsync_bp_info info;
209 struct vnode *vp = ap->a_vp;
214 * XXX why is all this fs specific?
218 * Flush all dirty buffers associated with a vnode.
220 ext2_discard_prealloc(VTOI(vp));
222 lwkt_gettoken(&vlock, &vp->v_token);
225 info.waitfor = ap->a_waitfor;
226 count = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
227 ext2_fsync_bp, &info);
231 if (ap->a_waitfor == MNT_WAIT) {
232 bio_track_wait(&vp->v_track_write, 0, 0);
234 if (!RB_EMPTY(&vp->v_rbdirty_tree)) {
235 vprint("ext2_fsync: dirty", vp);
240 lwkt_reltoken(&vlock);
241 return (EXT2_UPDATE(ap->a_vp, ap->a_waitfor == MNT_WAIT));
245 ext2_fsync_bp(struct buf *bp, void *data)
247 struct ext2_fsync_bp_info *info = data;
249 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
251 if ((bp->b_flags & B_DELWRI) == 0)
252 panic("ext2_fsync: not dirty");
257 * Wait for I/O associated with indirect blocks to complete,
258 * since there is no way to quickly wait for them below.
260 if (bp->b_vp == info->vp || info->waitfor == MNT_NOWAIT)
271 * ext2_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
272 * struct componentname *a_cnp, struct vattr *a_vap)
276 ext2_mknod(struct vop_old_mknod_args *ap)
278 struct vattr *vap = ap->a_vap;
279 struct vnode **vpp = ap->a_vpp;
284 if (vap->va_rmajor != VNOVAL &&
285 makeudev(vap->va_rmajor, vap->va_rminor) == NOUDEV) {
289 error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
290 ap->a_dvp, vpp, ap->a_cnp);
294 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
295 if (vap->va_rmajor != VNOVAL) {
297 * Want to be able to use this to make badblock
298 * inodes, so don't truncate the dev number.
300 ip->i_rdev = makeudev(vap->va_rmajor, vap->va_rminor);
303 * Remove inode, then reload it through VFS_VGET so it is
304 * checked to see if it is an alias of an existing entry in
307 (*vpp)->v_type = VNON;
308 ino = ip->i_number; /* Save this before vgone() invalidates ip. */
309 vgone_vxlocked(*vpp);
311 error = VFS_VGET(ap->a_dvp->v_mount, NULL, ino, vpp);
320 * ext2_remove(struct vnode *a_dvp, struct vnode *a_vp,
321 * struct componentname *a_cnp)
324 ext2_remove(struct vop_old_remove_args *ap)
327 struct vnode *vp = ap->a_vp;
328 struct vnode *dvp = ap->a_dvp;
332 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
333 (VTOI(dvp)->i_flags & APPEND)) {
337 error = ext2_dirremove(dvp, ap->a_cnp);
340 ip->i_flag |= IN_CHANGE;
349 * ext2_link(struct vnode *a_tdvp, struct vnode *a_vp,
350 * struct componentname *a_cnp)
353 ext2_link(struct vop_old_link_args *ap)
355 struct vnode *vp = ap->a_vp;
356 struct vnode *tdvp = ap->a_tdvp;
357 struct componentname *cnp = ap->a_cnp;
361 if (tdvp->v_mount != vp->v_mount) {
365 if (tdvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) {
369 if ((nlink_t)ip->i_nlink >= LINK_MAX) {
373 if (ip->i_flags & (IMMUTABLE | APPEND)) {
378 ip->i_flag |= IN_CHANGE;
379 error = EXT2_UPDATE(vp, 1);
381 error = ext2_direnter(ip, tdvp, cnp);
384 ip->i_flag |= IN_CHANGE;
394 * Rename system call. fdvp, fvp are ref'd. tvp, tdvp are ref'd and locked.
395 * all vp's are released and must be in an unlocked state on return.
397 * ext2_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
398 * struct componentname *a_fcnp, struct vnode *a_tdvp,
399 * struct vnode *a_tvp, struct componentname *a_tcnp)
402 ext2_rename(struct vop_old_rename_args *ap)
404 struct vnode *tvp = ap->a_tvp;
405 struct vnode *tdvp = ap->a_tdvp;
406 struct vnode *fvp = ap->a_fvp;
407 struct vnode *fdvp = ap->a_fdvp;
408 struct componentname *tcnp = ap->a_tcnp;
409 struct componentname *fcnp = ap->a_fcnp;
410 struct inode *ip, *xp, *dp;
411 struct dirtemplate dirbuf;
412 int doingdirectory = 0, oldparent = 0, newparent = 0;
417 * Check for cross-device rename.
419 if ((fvp->v_mount != tdvp->v_mount) ||
420 (tvp && (fvp->v_mount != tvp->v_mount)) ||
435 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
436 (VTOI(tdvp)->i_flags & APPEND))) {
442 * Renaming a file to itself has no effect. The upper layers should
443 * not call us in that case. Temporarily just warn if they do.
450 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0)
454 * fvp, tvp, tdvp locked. fdvp not locked but note that fdvp may
459 if (ip->i_nlink >= LINK_MAX) {
464 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
465 || (dp->i_flags & APPEND)) {
470 if ((ip->i_mode & IFMT) == IFDIR) {
472 * Avoid ".", "..", and aliases of "." for obvious reasons.
474 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
475 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & CNP_ISDOTDOT ||
476 (ip->i_flag & IN_RENAME)) {
481 ip->i_flag |= IN_RENAME;
482 oldparent = dp->i_number;
487 * tvp is non-NULL if the target exists. fvp is still locked but
488 * we will unlock it soon. The 'bad' goto target requires dp and
489 * xp to be correctly assigned.
498 * 1) Bump link count while we're moving stuff
499 * around. If we crash somewhere before
500 * completing our work, the link count
501 * may be wrong, but correctable.
504 ip->i_flag |= IN_CHANGE;
505 if ((error = EXT2_UPDATE(fvp, 1)) != 0) {
511 * If ".." must be changed (ie the directory gets a new
512 * parent) then the source directory must not be in the
513 * directory heirarchy above the target, as this would
514 * orphan everything below the source directory. Also
515 * the user must have write permission in the source so
516 * as to be able to change "..". We must repeat the call
517 * to namei, as the parent directory is unlocked by the
518 * call to checkpath().
520 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred);
524 * tvp (if not NULL) and tdvp are locked. fvp and fdvp are not.
525 * dp and xp are set according to tdvp and tvp.
527 if (oldparent != dp->i_number)
528 newparent = dp->i_number;
529 if (doingdirectory && newparent) {
530 if (error) /* write access check above */
534 * Prepare for relookup, get rid of xp
542 * checkpath vput()'s tdvp (VTOI(dp)) on return no matter what,
543 * get an extra ref so we wind up with just an unlocked, ref'd
544 * tdvp. The 'out' target skips xp and tdvp cleanups. Our
545 * tdvp is now unlocked so we have to clean it up ourselves.
548 error = ext2_checkpath(ip, dp, tcnp->cn_cred);
549 tcnp->cn_flags |= CNP_PDIRUNLOCK;
555 * relookup no longer messes with the ref count. An unlocked
556 * tdvp must be passed and if no error occurs a locked tdvp
557 * will be returned. We have to use the out target again.
559 error = relookup(tdvp, &tvp, tcnp);
561 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
569 * tdvp is locked at this point. in the RENAME case tvp may
570 * be NULL without an error, assign xp accordingly. The
571 * 'bad' target can be used again after this.
578 * 2) If target doesn't exist, link the target
579 * to the source and unlink the source.
580 * Otherwise, rewrite the target directory
581 * entry to reference the source inode and
582 * expunge the original entry's existence.
584 * tdvp and tvp are cleaned up by this code. tvp is only good if
588 if (dp->i_dev != ip->i_dev)
589 panic("ext2_rename: EXDEV");
591 * Account for ".." in new directory.
592 * When source and destination have the same
593 * parent we don't fool with the link count.
595 if (doingdirectory && newparent) {
596 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
601 dp->i_flag |= IN_CHANGE;
602 error = EXT2_UPDATE(tdvp, 1);
606 error = ext2_direnter(ip, tdvp, tcnp);
608 if (doingdirectory && newparent) {
610 dp->i_flag |= IN_CHANGE;
611 EXT2_UPDATE(tdvp, 1);
617 * manual cleanup, we can't use the bad or out target after
622 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
623 panic("ext2_rename: EXDEV");
625 * Short circuit rename(foo, foo).
627 if (xp->i_number == ip->i_number)
628 panic("ext2_rename: same file");
630 * If the parent directory is "sticky", then the user must
631 * own the parent directory, or the destination of the rename,
632 * otherwise the destination may not be changed (except by
633 * root). This implements append-only directories.
635 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
636 tcnp->cn_cred->cr_uid != dp->i_uid &&
637 xp->i_uid != tcnp->cn_cred->cr_uid) {
642 * Target must be empty if a directory and have no links
643 * to it. Also, ensure source and target are compatible
644 * (both directories, or both not directories).
646 if ((xp->i_mode&IFMT) == IFDIR) {
647 if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) ||
652 if (!doingdirectory) {
656 } else if (doingdirectory) {
660 error = ext2_dirrewrite(dp, ip, tcnp);
664 * If the target directory is in the same
665 * directory as the source directory,
666 * decrement the link count on the parent
667 * of the target directory.
669 if (doingdirectory && !newparent) {
671 dp->i_flag |= IN_CHANGE;
675 * manual cleanup, we can't use the bad or out target after
681 * Adjust the link count of the target to
682 * reflect the dirrewrite above. If this is
683 * a directory it is empty and there are
684 * no links to it, so we can squash the inode and
685 * any space associated with it. We disallowed
686 * renaming over top of a directory with links to
687 * it above, as the remaining link would point to
688 * a directory without "." or ".." entries.
691 if (doingdirectory) {
692 if (--xp->i_nlink != 0)
693 panic("ext2_rename: linked directory");
694 error = EXT2_TRUNCATE(tvp, (off_t)0, IO_SYNC,
697 xp->i_flag |= IN_CHANGE;
703 * tvp and tdvp have been cleaned up. The bad and out targets may
704 * not be used. fvp and fdvp are ref'd but not locked. ip
705 * still represents the old fvp and ip->i_flag may still have IN_RENAME
706 * set (if doingdirectory).
710 * 3) Unlink the source.
712 * fdvp is locked and ref'd. ap->a_fvp holds the old lookup unlocked
713 * and ref'd, fvp will hold the new lookup locked and ref'd.
715 * After the relookup ap->a_fvp must be released as part of our
716 * cleanup, not just fdvp and fvp. And, on success, fdvp and
717 * fvp will be locked so the bad and out targets cannot be used.
719 fcnp->cn_flags &= ~CNP_MODMASK;
720 fcnp->cn_flags |= CNP_LOCKPARENT;
721 KKASSERT(fcnp->cn_flags & CNP_PDIRUNLOCK);
722 error = relookup(fdvp, &fvp, fcnp);
725 * From name has disappeared.
728 panic("ext2_rename: lost dir entry");
729 /* ip->i_flag only sets IN_RENAME if doingdirectory */
731 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
737 KKASSERT((fcnp->cn_flags & CNP_PDIRUNLOCK) == 0);
740 * This case shouldn't occur
744 * From name has disappeared.
747 panic("ext2_rename: lost dir entry");
748 /* ip->i_flag only sets IN_RENAME if doingdirectory */
756 * fvp and fdvp are both ref'd and locked.
762 * Ensure that the directory entry still exists and has not
763 * changed while the new name has been entered. If the source is
764 * a file then the entry may have been unlinked or renamed. In
765 * either case there is no further work to be done. If the source
766 * is a directory then it cannot have been rmdir'ed; its link
767 * count of three would cause a rmdir to fail with ENOTEMPTY.
768 * The IN_RENAME flag ensures that it cannot be moved by another
773 panic("ext2_rename: lost dir entry");
774 /* ip->i_flag only sets IN_RENAME if doingdirectory */
777 * If the source is a directory with a
778 * new parent, the link count of the old
779 * parent directory must be decremented
780 * and ".." set to point to the new parent.
782 if (doingdirectory && newparent) {
784 dp->i_flag |= IN_CHANGE;
785 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf,
786 sizeof (struct dirtemplate), (off_t)0,
787 UIO_SYSSPACE, IO_NODELOCKED,
788 tcnp->cn_cred, NULL);
790 /* Like ext2 little-endian: */
791 namlen = dirbuf.dotdot_type;
793 dirbuf.dotdot_name[0] != '.' ||
794 dirbuf.dotdot_name[1] != '.') {
795 ext2_dirbad(xp, (doff_t)12,
796 "rename: mangled dir");
798 dirbuf.dotdot_ino = newparent;
799 vn_rdwr(UIO_WRITE, fvp,
801 sizeof (struct dirtemplate),
802 (off_t)0, UIO_SYSSPACE,
803 IO_NODELOCKED|IO_SYNC,
804 tcnp->cn_cred, NULL);
808 error = ext2_dirremove(fdvp, fcnp);
811 xp->i_flag |= IN_CHANGE;
813 xp->i_flag &= ~IN_RENAME;
827 ip->i_flag &= ~IN_RENAME;
828 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) {
830 ip->i_flag |= IN_CHANGE;
831 ip->i_flag &= ~IN_RENAME;
842 * ext2_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
843 * struct componentname *a_cnp, struct vattr *a_vap)
846 ext2_mkdir(struct vop_old_mkdir_args *ap)
848 struct vnode *dvp = ap->a_dvp;
849 struct vattr *vap = ap->a_vap;
850 struct componentname *cnp = ap->a_cnp;
851 struct inode *ip, *dp;
853 struct dirtemplate dirtemplate, *dtp;
857 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
861 dmode = vap->va_mode & 0777;
864 * Must simulate part of ext2_makeinode here to acquire the inode,
865 * but not have it entered in the parent directory. The entry is
866 * made later after writing "." and ".." entries.
868 error = EXT2_VALLOC(dvp, dmode, cnp->cn_cred, &tvp);
872 ip->i_gid = dp->i_gid;
876 struct ucred ucred, *ucp;
880 * if we are hacking owners here, (only do this where told to)
881 * and we are not giving it TOO root, (would subvert quotas)
882 * then go ahead and give it to the other user.
883 * The new directory also inherits the SUID bit.
884 * If user's UID and dir UID are the same,
885 * 'give it away' so that the SUID is still forced on.
887 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
888 (dp->i_mode & ISUID) && dp->i_uid) {
890 ip->i_uid = dp->i_uid;
892 if (dp->i_uid != cnp->cn_cred->cr_uid) {
894 * make sure the correct user gets charged
896 * Make a dummy credential for the victim.
897 * XXX This seems to never be accessed out of
898 * our context so a stack variable is ok.
901 ucred.cr_uid = ip->i_uid;
902 ucred.cr_ngroups = 1;
903 ucred.cr_groups[0] = dp->i_gid;
908 ip->i_uid = cnp->cn_cred->cr_uid;
911 if ((error = ext2_getinoquota(ip)) ||
912 (error = ext2_chkiq(ip, 1, ucp, 0))) {
913 EXT2_VFREE(tvp, ip->i_number, dmode);
920 ip->i_uid = cnp->cn_cred->cr_uid;
922 if ((error = ext2_getinoquota(ip)) ||
923 (error = ext2_chkiq(ip, 1, cnp->cn_cred, 0))) {
924 EXT2_VFREE(tvp, ip->i_number, dmode);
930 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
932 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
934 if (cnp->cn_flags & CNP_ISWHITEOUT)
935 ip->i_flags |= UF_OPAQUE;
936 error = EXT2_UPDATE(tvp, 1);
939 * The vnode must have a VM object in order to issue buffer cache
945 * Bump link count in parent directory
946 * to reflect work done below. Should
947 * be done before reference is created
948 * so reparation is possible if we crash.
951 dp->i_flag |= IN_CHANGE;
952 error = EXT2_UPDATE(dvp, 1);
956 /* Initialize directory with "." and ".." from static template. */
957 if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs->s_es,
958 EXT2_FEATURE_INCOMPAT_FILETYPE))
959 dtp = &ext2_mastertemplate;
961 dtp = &ext2_omastertemplate;
963 dirtemplate.dot_ino = ip->i_number;
964 dirtemplate.dotdot_ino = dp->i_number;
965 /* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE
966 * so let's just redefine it - for this function only
969 #define DIRBLKSIZ VTOI(dvp)->i_e2fs->s_blocksize
970 dirtemplate.dotdot_reclen = DIRBLKSIZ - 12;
971 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate,
972 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
973 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, NULL);
976 dp->i_flag |= IN_CHANGE;
979 if (DIRBLKSIZ > VFSTOEXT2(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
980 panic("ext2_mkdir: blksize"); /* XXX should grow with balloc() */
982 ip->i_size = DIRBLKSIZ;
983 ip->i_flag |= IN_CHANGE;
986 /* Directory set up, now install its entry in the parent directory. */
987 error = ext2_direnter(ip, dvp, cnp);
990 dp->i_flag |= IN_CHANGE;
994 * No need to do an explicit VOP_TRUNCATE here, vrele will do this
995 * for us because we set the link count to 0.
999 ip->i_flag |= IN_CHANGE;
1006 #define DIRBLKSIZ DEV_BSIZE
1010 * Rmdir system call.
1012 * ext2_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
1013 * struct componentname *a_cnp)
1016 ext2_rmdir(struct vop_old_rmdir_args *ap)
1018 struct vnode *vp = ap->a_vp;
1019 struct vnode *dvp = ap->a_dvp;
1020 struct componentname *cnp = ap->a_cnp;
1021 struct inode *ip, *dp;
1028 * Verify the directory is empty (and valid).
1029 * (Rmdir ".." won't be valid since
1030 * ".." will contain a reference to
1031 * the current directory and thus be
1035 if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) {
1039 if ((dp->i_flags & APPEND)
1040 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1045 * Delete reference to directory before purging
1046 * inode. If we crash in between, the directory
1047 * will be reattached to lost+found,
1049 error = ext2_dirremove(dvp, cnp);
1053 dp->i_flag |= IN_CHANGE;
1056 * Truncate inode. The only stuff left
1057 * in the directory is "." and "..". The
1058 * "." reference is inconsequential since
1059 * we're quashing it. The ".." reference
1060 * has already been adjusted above. We've
1061 * removed the "." reference and the reference
1062 * in the parent directory, but there may be
1063 * other hard links so decrement by 2 and
1064 * worry about them later.
1067 error = EXT2_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred);
1068 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1074 * symlink -- make a symbolic link
1076 * ext2_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1077 * struct componentname *a_cnp, struct vattr *a_vap,
1081 ext2_symlink(struct vop_old_symlink_args *ap)
1083 struct vnode *vp, **vpp = ap->a_vpp;
1087 error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1092 len = strlen(ap->a_target);
1093 if (len < vp->v_mount->mnt_maxsymlinklen) {
1095 bcopy(ap->a_target, (char *)ip->i_shortlink, len);
1097 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1100 * Make sure we have a VM object in order to use
1103 if (vp->v_object == NULL)
1106 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
1107 UIO_SYSSPACE, IO_NODELOCKED,
1108 ap->a_cnp->cn_cred, NULL);
1118 * Allocate a new inode.
1121 ext2_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
1122 struct componentname *cnp)
1124 struct inode *ip, *pdir;
1130 if ((mode & IFMT) == 0)
1133 error = EXT2_VALLOC(dvp, mode, cnp->cn_cred, &tvp);
1138 ip->i_gid = pdir->i_gid;
1142 struct ucred ucred, *ucp;
1147 * not the owner of the directory,
1148 * and we are hacking owners here, (only do this where told to)
1149 * and we are not giving it TOO root, (would subvert quotas)
1150 * then go ahead and give it to the other user.
1151 * Note that this drops off the execute bits for security.
1153 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1154 (pdir->i_mode & ISUID) &&
1155 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
1156 ip->i_uid = pdir->i_uid;
1160 * make sure the correct user gets charged
1162 * Quickly knock up a dummy credential for the victim.
1163 * XXX This seems to never be accessed out of our
1164 * context so a stack variable is ok.
1167 ucred.cr_uid = ip->i_uid;
1168 ucred.cr_ngroups = 1;
1169 ucred.cr_groups[0] = pdir->i_gid;
1173 ip->i_uid = cnp->cn_cred->cr_uid;
1177 if ((error = ext2_getinoquota(ip)) ||
1178 (error = ext2_chkiq(ip, 1, ucp, 0))) {
1179 EXT2_VFREE(tvp, ip->i_number, mode);
1186 ip->i_uid = cnp->cn_cred->cr_uid;
1188 if ((error = ext2_getinoquota(ip)) ||
1189 (error = ext2_chkiq(ip, 1, cnp->cn_cred, 0))) {
1190 EXT2_VFREE(tvp, ip->i_number, mode);
1196 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1198 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
1200 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
1201 priv_check_cred(cnp->cn_cred, PRIV_VFS_SETGID, 0))
1202 ip->i_mode &= ~ISGID;
1204 if (cnp->cn_flags & CNP_ISWHITEOUT)
1205 ip->i_flags |= UF_OPAQUE;
1208 * Regular files and directories need VM objects. Softlinks do
1209 * not (not immediately anyway).
1211 if (tvp->v_type == VREG || tvp->v_type == VDIR)
1215 * Make sure inode goes to disk before directory entry.
1217 error = EXT2_UPDATE(tvp, 1);
1220 error = ext2_direnter(ip, dvp, cnp);
1229 * Write error occurred trying to update the inode
1230 * or the directory so must deallocate the inode.
1233 ip->i_flag |= IN_CHANGE;
1241 * XXX By default, wimp out... note that a_offset is ignored (and always
1245 ext2_getpages(struct vop_getpages_args *ap)
1247 return (vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1252 ext2_itimes(struct vnode *vp)
1258 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0)
1260 if ((vp->v_type == VBLK || vp->v_type == VCHR) && !DOINGSOFTDEP(vp))
1261 ip->i_flag |= IN_LAZYMOD;
1263 ip->i_flag |= IN_MODIFIED;
1264 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
1266 if (ip->i_flag & IN_ACCESS) {
1267 ip->i_atime = ts.tv_sec;
1268 ip->i_atimensec = ts.tv_nsec;
1270 if (ip->i_flag & IN_UPDATE) {
1271 ip->i_mtime = ts.tv_sec;
1272 ip->i_mtimensec = ts.tv_nsec;
1275 if (ip->i_flag & IN_CHANGE) {
1276 ip->i_ctime = ts.tv_sec;
1277 ip->i_ctimensec = ts.tv_nsec;
1280 ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
1288 * ext2_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
1289 * struct file *a_fp)
1294 ext2_open(struct vop_open_args *ap)
1296 struct vnode *vp = ap->a_vp;
1299 * Files marked append-only must be opened for appending.
1301 if ((VTOI(vp)->i_flags & APPEND) &&
1302 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) {
1305 return (vop_stdopen(ap));
1311 * Update the times on the inode.
1313 * ext2_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred)
1318 ext2_close(struct vop_close_args *ap)
1320 struct vnode *vp = ap->a_vp;
1322 if (vp->v_sysref.refcnt > 1)
1324 return (vop_stdclose(ap));
1328 * ext2_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
1332 ext2_access(struct vop_access_args *ap)
1334 struct vnode *vp = ap->a_vp;
1335 struct inode *ip = VTOI(vp);
1336 struct ucred *cred = ap->a_cred;
1337 mode_t mask, mode = ap->a_mode;
1345 * Disallow write attempts on read-only filesystems;
1346 * unless the file is a socket, fifo, or a block or
1347 * character device resident on the filesystem.
1349 if (mode & VWRITE) {
1350 switch (vp->v_type) {
1354 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1357 if ((error = ext2_getinoquota(ip)) != 0)
1366 /* If immutable bit set, nobody gets to write it. */
1367 if ((mode & VWRITE) && (ip->i_flags & IMMUTABLE))
1370 /* Otherwise, user id 0 always gets access. */
1371 if (cred->cr_uid == 0)
1376 /* Otherwise, check the owner. */
1377 if (cred->cr_uid == ip->i_uid) {
1384 return ((ip->i_mode & mask) == mask ? 0 : EACCES);
1387 /* Otherwise, check the groups. */
1388 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
1389 if (ip->i_gid == *gp) {
1396 return ((ip->i_mode & mask) == mask ? 0 : EACCES);
1399 /* Otherwise, check everyone else. */
1406 return ((ip->i_mode & mask) == mask ? 0 : EACCES);
1410 * ext2_getattr(struct vnode *a_vp, struct vattr *a_vap)
1415 ext2_getattr(struct vop_getattr_args *ap)
1417 struct vnode *vp = ap->a_vp;
1418 struct inode *ip = VTOI(vp);
1419 struct vattr *vap = ap->a_vap;
1423 * Copy from inode table
1425 vap->va_fsid = dev2udev(ip->i_dev);
1426 vap->va_fileid = ip->i_number;
1427 vap->va_mode = ip->i_mode & ~IFMT;
1428 vap->va_nlink = VFSTOEXT2(vp->v_mount)->um_i_effnlink_valid ?
1429 ip->i_effnlink : ip->i_nlink;
1430 vap->va_uid = ip->i_uid;
1431 vap->va_gid = ip->i_gid;
1432 vap->va_rmajor = umajor(ip->i_rdev);
1433 vap->va_rminor = uminor(ip->i_rdev);
1434 vap->va_size = ip->i_din.di_size;
1435 vap->va_atime.tv_sec = ip->i_atime;
1436 vap->va_atime.tv_nsec = ip->i_atimensec;
1437 vap->va_mtime.tv_sec = ip->i_mtime;
1438 vap->va_mtime.tv_nsec = ip->i_mtimensec;
1439 vap->va_ctime.tv_sec = ip->i_ctime;
1440 vap->va_ctime.tv_nsec = ip->i_ctimensec;
1441 vap->va_flags = ip->i_flags;
1442 vap->va_gen = ip->i_gen;
1443 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
1444 vap->va_bytes = dbtob((u_quad_t)ip->i_blocks);
1445 vap->va_type = IFTOVT(ip->i_mode);
1446 vap->va_filerev = ip->i_modrev;
1451 * Set attribute vnode op. called from several syscalls
1453 * ext2_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
1457 ext2_setattr(struct vop_setattr_args *ap)
1459 struct vattr *vap = ap->a_vap;
1460 struct vnode *vp = ap->a_vp;
1461 struct inode *ip = VTOI(vp);
1462 struct ucred *cred = ap->a_cred;
1466 * Check for unsettable attributes.
1468 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
1469 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
1470 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) ||
1471 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
1474 if (vap->va_flags != VNOVAL) {
1475 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1477 if (cred->cr_uid != ip->i_uid &&
1478 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)))
1481 * Note that a root chflags becomes a user chflags when
1482 * we are jailed, unless the jail.chflags_allowed sysctl
1485 if (cred->cr_uid == 0 &&
1486 (!jailed(cred) || jail_chflags_allowed)) {
1488 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) &&
1491 ip->i_flags = vap->va_flags;
1494 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) ||
1495 (vap->va_flags & UF_SETTABLE) != vap->va_flags)
1497 ip->i_flags &= SF_SETTABLE;
1498 ip->i_flags |= (vap->va_flags & UF_SETTABLE);
1500 ip->i_flag |= IN_CHANGE;
1501 if (vap->va_flags & (IMMUTABLE | APPEND))
1504 if (ip->i_flags & (IMMUTABLE | APPEND))
1507 * Go through the fields and update iff not VNOVAL.
1509 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
1510 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1512 if ((error = ext2_chown(vp, vap->va_uid, vap->va_gid, cred)) != 0)
1515 if (vap->va_size != VNOVAL) {
1517 * Disallow write attempts on read-only filesystems;
1518 * unless the file is a socket, fifo, or a block or
1519 * character device resident on the filesystem.
1521 switch (vp->v_type) {
1526 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1532 if ((error = EXT2_TRUNCATE(vp, vap->va_size, 0, cred)) != 0)
1536 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
1537 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1539 if (cred->cr_uid != ip->i_uid &&
1540 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)) &&
1541 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
1542 (error = VOP_ACCESS(vp, VWRITE, cred))))
1544 if (vap->va_atime.tv_sec != VNOVAL)
1545 ip->i_flag |= IN_ACCESS;
1546 if (vap->va_mtime.tv_sec != VNOVAL)
1547 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1549 if (vap->va_atime.tv_sec != VNOVAL) {
1550 ip->i_atime = vap->va_atime.tv_sec;
1551 ip->i_atimensec = vap->va_atime.tv_nsec;
1553 if (vap->va_mtime.tv_sec != VNOVAL) {
1554 ip->i_mtime = vap->va_mtime.tv_sec;
1555 ip->i_mtimensec = vap->va_mtime.tv_nsec;
1557 error = EXT2_UPDATE(vp, 0);
1562 if (vap->va_mode != (mode_t)VNOVAL) {
1563 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1565 error = ext2_chmod(vp, (int)vap->va_mode, cred);
1567 VN_KNOTE(vp, NOTE_ATTRIB);
1572 * Change the mode on a file.
1573 * Inode must be locked before calling.
1576 ext2_chmod(struct vnode *vp, int mode, struct ucred *cred)
1578 struct inode *ip = VTOI(vp);
1581 if (cred->cr_uid != ip->i_uid) {
1582 error = priv_check_cred(cred, PRIV_VFS_CHMOD, 0);
1587 if (vp->v_type != VDIR && (mode & S_ISTXT))
1589 if (!groupmember(ip->i_gid, cred) && (mode & ISGID))
1592 ip->i_mode &= ~ALLPERMS;
1593 ip->i_mode |= (mode & ALLPERMS);
1594 ip->i_flag |= IN_CHANGE;
1599 * Perform chown operation on inode ip;
1600 * inode must be locked prior to call.
1603 ext2_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred)
1605 struct inode *ip = VTOI(vp);
1614 if (uid == (uid_t)VNOVAL)
1616 if (gid == (gid_t)VNOVAL)
1619 * If we don't own the file, are trying to change the owner
1620 * of the file, or are not a member of the target group,
1621 * the caller must be superuser or the call fails.
1623 if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid ||
1624 (gid != ip->i_gid && !(cred->cr_gid == gid ||
1625 groupmember((gid_t)gid, cred)))) &&
1626 (error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0)))
1631 if ((error = ext2_getinoquota(ip)) != 0)
1634 ext2_dqrele(vp, ip->i_dquot[USRQUOTA]);
1635 ip->i_dquot[USRQUOTA] = NODQUOT;
1638 ext2_dqrele(vp, ip->i_dquot[GRPQUOTA]);
1639 ip->i_dquot[GRPQUOTA] = NODQUOT;
1641 change = ip->i_blocks;
1642 (void) ext2_chkdq(ip, -change, cred, CHOWN);
1643 (void) ext2_chkiq(ip, -1, cred, CHOWN);
1644 for (i = 0; i < MAXQUOTAS; i++) {
1645 ext2_dqrele(vp, ip->i_dquot[i]);
1646 ip->i_dquot[i] = NODQUOT;
1652 if ((error = ext2_getinoquota(ip)) == 0) {
1654 ext2_dqrele(vp, ip->i_dquot[USRQUOTA]);
1655 ip->i_dquot[USRQUOTA] = NODQUOT;
1658 ext2_dqrele(vp, ip->i_dquot[GRPQUOTA]);
1659 ip->i_dquot[GRPQUOTA] = NODQUOT;
1661 if ((error = ext2_chkdq(ip, change, cred, CHOWN)) == 0) {
1662 if ((error = ext2_chkiq(ip, 1, cred, CHOWN)) == 0)
1665 (void)ext2_chkdq(ip, -change, cred, CHOWN|FORCE);
1667 for (i = 0; i < MAXQUOTAS; i++) {
1668 ext2_dqrele(vp, ip->i_dquot[i]);
1669 ip->i_dquot[i] = NODQUOT;
1674 if (ext2_getinoquota(ip) == 0) {
1676 ext2_dqrele(vp, ip->i_dquot[USRQUOTA]);
1677 ip->i_dquot[USRQUOTA] = NODQUOT;
1680 ext2_dqrele(vp, ip->i_dquot[GRPQUOTA]);
1681 ip->i_dquot[GRPQUOTA] = NODQUOT;
1683 (void) ext2_chkdq(ip, change, cred, FORCE|CHOWN);
1684 (void) ext2_chkiq(ip, 1, cred, FORCE|CHOWN);
1685 (void) ext2_getinoquota(ip);
1689 if (ext2_getinoquota(ip))
1690 panic("ext2_chown: lost quota");
1692 ip->i_flag |= IN_CHANGE;
1693 if (cred->cr_uid != 0 && (ouid != uid || ogid != gid))
1694 ip->i_mode &= ~(ISUID | ISGID);
1701 * NB Currently unsupported.
1703 * ext2_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
1708 ext2_mmap(struct vop_mmap_args *ap)
1714 * whiteout vnode call
1716 * ext2_whiteout(struct vnode *a_dvp, struct componentname *a_cnp, int a_flags)
1720 ext2_whiteout(struct vop_old_whiteout_args *ap)
1722 return (EOPNOTSUPP);
1726 * Return target name of a symbolic link
1728 * ext2_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1732 ext2_readlink(struct vop_readlink_args *ap)
1734 struct vnode *vp = ap->a_vp;
1735 struct inode *ip = VTOI(vp);
1739 if ((isize < vp->v_mount->mnt_maxsymlinklen) ||
1740 (ip->i_din.di_blocks == 0)) { /* XXX - for old fastlink support */
1741 uiomove((char *)ip->i_shortlink, isize, ap->a_uio);
1744 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
1748 * Calculate the logical to physical mapping if not done already,
1749 * then call the device strategy routine.
1751 * In order to be able to swap to a file, the VOP_BMAP operation may not
1752 * deadlock on memory. See ext2_bmap() for details.
1754 * ext2_strategy(struct vnode *a_vp, struct bio *a_bio)
1758 ext2_strategy(struct vop_strategy_args *ap)
1760 struct bio *bio = ap->a_bio;
1762 struct buf *bp = bio->bio_buf;
1763 struct vnode *vp = ap->a_vp;
1768 if (vp->v_type == VBLK || vp->v_type == VCHR)
1769 panic("ext2_strategy: spec");
1770 nbio = push_bio(bio);
1771 if (nbio->bio_offset == NOOFFSET) {
1772 error = VOP_BMAP(vp, bio->bio_offset, &nbio->bio_offset,
1773 NULL, NULL, bp->b_cmd);
1775 bp->b_error = error;
1776 bp->b_flags |= B_ERROR;
1777 /* I/O was never started on nbio, must biodone(bio) */
1781 if (nbio->bio_offset == NOOFFSET)
1784 if (nbio->bio_offset == NOOFFSET) {
1785 /* I/O was never started on nbio, must biodone(bio) */
1789 vn_strategy(ip->i_devvp, nbio);
1794 * Print out the contents of an inode.
1796 * ext2_print(struct vnode *a_vp)
1800 ext2_print(struct vop_print_args *ap)
1802 struct vnode *vp = ap->a_vp;
1803 struct inode *ip = VTOI(vp);
1805 kprintf("tag VT_EXT2FS, ino %lu, on dev %s (%d, %d)",
1806 (u_long)ip->i_number, devtoname(ip->i_dev), major(ip->i_dev),
1808 if (vp->v_type == VFIFO)
1810 lockmgr_printinfo(&vp->v_lock);
1816 * Read wrapper for fifos.
1818 * ext2fifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1819 * struct ucred *a_cred)
1823 ext2fifo_read(struct vop_read_args *ap)
1830 resid = uio->uio_resid;
1831 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1832 ip = VTOI(ap->a_vp);
1833 if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) == 0 && ip != NULL &&
1834 (uio->uio_resid != resid || (error == 0 && resid != 0)))
1835 VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
1840 * Write wrapper for fifos.
1842 * ext2fifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1843 * struct ucred *a_cred)
1847 ext2fifo_write(struct vop_write_args *ap)
1854 resid = uio->uio_resid;
1855 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1856 ip = VTOI(ap->a_vp);
1857 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
1858 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
1863 * Close wrapper for fifos.
1865 * Update the times on the inode then do device close.
1867 * ext2fifo_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred)
1871 ext2fifo_close(struct vop_close_args *ap)
1873 struct vnode *vp = ap->a_vp;
1875 if (vp->v_sysref.refcnt > 1)
1877 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
1881 * Kqfilter wrapper for fifos.
1883 * Fall through to ext2 kqfilter routines if needed
1887 ext2fifo_kqfilter(struct vop_kqfilter_args *ap)
1891 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1893 error = ext2_kqfilter(ap);
1898 * Return POSIX pathconf information applicable to ext2 filesystems.
1900 * ext2_pathconf(struct vnode *a_vp, int a_name, int *a_retval)
1904 ext2_pathconf(struct vop_pathconf_args *ap)
1906 switch (ap->a_name) {
1908 *ap->a_retval = LINK_MAX;
1911 *ap->a_retval = NAME_MAX;
1914 *ap->a_retval = PATH_MAX;
1917 *ap->a_retval = PIPE_BUF;
1919 case _PC_CHOWN_RESTRICTED:
1932 * Advisory record locking support
1934 * ext2_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
1939 ext2_advlock(struct vop_advlock_args *ap)
1941 struct inode *ip = VTOI(ap->a_vp);
1943 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size));
1947 * Initialize the vnode associated with a new inode, handle aliased
1951 ext2_vinit(struct mount *mntp, struct vnode **vpp)
1960 switch(vp->v_type = IFTOVT(ip->i_mode)) {
1963 vp->v_ops = &mntp->mnt_vn_spec_ops;
1964 addaliasu(vp, umajor(ip->i_rdev), uminor(ip->i_rdev));
1967 vp->v_ops = &mntp->mnt_vn_fifo_ops;
1971 vinitvmio(vp, ip->i_size);
1974 if ((ip->i_size >= vp->v_mount->mnt_maxsymlinklen) &&
1975 ip->i_din.di_blocks != 0
1977 vinitvmio(vp, ip->i_size);
1985 if (ip->i_number == ROOTINO)
1986 vp->v_flag |= VROOT;
1988 * Initialize modrev times
1990 getmicrouptime(&tv);
1991 SETHIGH(ip->i_modrev, tv.tv_sec);
1992 SETLOW(ip->i_modrev, tv.tv_usec * 4294);
1997 static struct filterops ext2read_filtops =
1998 { 1, NULL, filt_ext2detach, filt_ext2read };
1999 static struct filterops ext2write_filtops =
2000 { 1, NULL, filt_ext2detach, filt_ext2write };
2001 static struct filterops ext2vnode_filtops =
2002 { 1, NULL, filt_ext2detach, filt_ext2vnode };
2005 * ext2_kqfilter(struct vnode *a_vp, struct knote *a_kn)
2008 ext2_kqfilter(struct vop_kqfilter_args *ap)
2010 struct vnode *vp = ap->a_vp;
2011 struct knote *kn = ap->a_kn;
2014 switch (kn->kn_filter) {
2016 kn->kn_fop = &ext2read_filtops;
2019 kn->kn_fop = &ext2write_filtops;
2022 kn->kn_fop = &ext2vnode_filtops;
2028 kn->kn_hook = (caddr_t)vp;
2030 lwkt_gettoken(&vlock, &vp->v_token);
2031 SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext);
2032 lwkt_reltoken(&vlock);
2038 filt_ext2detach(struct knote *kn)
2040 struct vnode *vp = (struct vnode *)kn->kn_hook;
2043 lwkt_gettoken(&vlock, &vp->v_token);
2044 SLIST_REMOVE(&vp->v_pollinfo.vpi_selinfo.si_note,
2045 kn, knote, kn_selnext);
2046 lwkt_reltoken(&vlock);
2051 filt_ext2read(struct knote *kn, long hint)
2053 struct vnode *vp = (struct vnode *)kn->kn_hook;
2054 struct inode *ip = VTOI(vp);
2057 * filesystem is gone, so set the EOF flag and schedule
2058 * the knote for deletion.
2060 if (hint == NOTE_REVOKE) {
2061 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2065 kn->kn_data = ip->i_size - kn->kn_fp->f_offset;
2066 return (kn->kn_data != 0);
2071 filt_ext2write(struct knote *kn, long hint)
2074 * filesystem is gone, so set the EOF flag and schedule
2075 * the knote for deletion.
2077 if (hint == NOTE_REVOKE)
2078 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2085 filt_ext2vnode(struct knote *kn, long hint)
2087 if (kn->kn_sfflags & hint)
2088 kn->kn_fflags |= hint;
2089 if (hint == NOTE_REVOKE) {
2090 kn->kn_flags |= EV_EOF;
2093 return (kn->kn_fflags != 0);
2096 struct vop_ops ext2_vnode_vops = {
2097 .vop_default = vop_defaultop,
2098 .vop_fsync = ext2_fsync,
2099 .vop_read = ext2_read,
2100 .vop_reallocblks = ext2_reallocblks,
2101 .vop_write = ext2_write,
2102 .vop_access = ext2_access,
2103 .vop_advlock = ext2_advlock,
2104 .vop_bmap = ext2_bmap,
2105 .vop_old_lookup = ext2_lookup,
2106 .vop_close = ext2_close,
2107 .vop_old_create = ext2_create,
2108 .vop_getattr = ext2_getattr,
2109 .vop_inactive = ext2_inactive,
2110 .vop_old_link = ext2_link,
2111 .vop_old_mkdir = ext2_mkdir,
2112 .vop_old_mknod = ext2_mknod,
2113 .vop_mmap = ext2_mmap,
2114 .vop_open = ext2_open,
2115 .vop_pathconf = ext2_pathconf,
2116 .vop_poll = vop_stdpoll,
2117 .vop_kqfilter = ext2_kqfilter,
2118 .vop_print = ext2_print,
2119 .vop_readdir = ext2_readdir,
2120 .vop_readlink = ext2_readlink,
2121 .vop_reclaim = ext2_reclaim,
2122 .vop_old_remove = ext2_remove,
2123 .vop_old_rename = ext2_rename,
2124 .vop_old_rmdir = ext2_rmdir,
2125 .vop_setattr = ext2_setattr,
2126 .vop_strategy = ext2_strategy,
2127 .vop_old_symlink = ext2_symlink,
2128 .vop_old_whiteout = ext2_whiteout,
2129 .vop_getpages = ext2_getpages,
2130 .vop_putpages = vop_stdputpages
2133 struct vop_ops ext2_spec_vops = {
2134 .vop_default = vop_defaultop,
2135 .vop_fsync = ext2_fsync,
2136 .vop_access = ext2_access,
2137 .vop_close = ext2_close,
2138 .vop_getattr = ext2_getattr,
2139 .vop_inactive = ext2_inactive,
2140 .vop_print = ext2_print,
2141 .vop_read = vop_stdnoread,
2142 .vop_reclaim = ext2_reclaim,
2143 .vop_setattr = ext2_setattr,
2144 .vop_write = vop_stdnowrite
2147 struct vop_ops ext2_fifo_vops = {
2148 .vop_default = ext2_vnoperatefifo,
2149 .vop_fsync = ext2_fsync,
2150 .vop_access = ext2_access,
2151 .vop_close = ext2fifo_close,
2152 .vop_getattr = ext2_getattr,
2153 .vop_inactive = ext2_inactive,
2154 .vop_kqfilter = ext2fifo_kqfilter,
2155 .vop_print = ext2_print,
2156 .vop_read = ext2fifo_read,
2157 .vop_reclaim = ext2_reclaim,
2158 .vop_setattr = ext2_setattr,
2159 .vop_write = ext2fifo_write
2162 VNODEOP_SET(ext2_vnode_vops);
2163 VNODEOP_SET(ext2_spec_vops);
2164 VNODEOP_SET(ext2_fifo_vops);
2170 ext2_vnoperate(struct vop_generic_args *ap)
2172 return (VOCALL(&ext2_vnode_vops, ap));
2176 * ext2_vnoperatefifo()
2179 ext2_vnoperatefifo(struct vop_generic_args *ap)
2181 return (VOCALL(&ext2_fifo_vops, ap));