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 * SPDX-License-Identifier: BSD-3-Clause
10 * Copyright (c) 1982, 1986, 1989, 1993
11 * The Regents of the University of California. All rights reserved.
12 * (c) UNIX System Laboratories, Inc.
13 * All or some portions of this file are derived from material licensed
14 * to the University of California by American Telephone and Telegraph
15 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
16 * the permission of UNIX System Laboratories, Inc.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * @(#)ufs_vnops.c 8.7 (Berkeley) 2/3/94
43 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95
47 #include "opt_suiddir.h"
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
52 #include <sys/fcntl.h>
53 #include <sys/filio.h>
54 #include <sys/limits.h>
59 #include <sys/endian.h>
61 #include <sys/rwlock.h>
62 #include <sys/mount.h>
63 #include <sys/unistd.h>
65 #include <sys/vnode.h>
66 #include <sys/namei.h>
67 #include <sys/lockf.h>
68 #include <sys/event.h>
71 #include <sys/extattr.h>
72 #include <sys/vmmeter.h>
75 #include <vm/vm_param.h>
76 #include <vm/vm_extern.h>
77 #include <vm/vm_object.h>
78 #include <vm/vm_page.h>
79 #include <vm/vm_pager.h>
80 #include <vm/vnode_pager.h>
82 #include "opt_directio.h"
84 #include <ufs/ufs/dir.h>
86 #include <fs/ext2fs/fs.h>
87 #include <fs/ext2fs/inode.h>
88 #include <fs/ext2fs/ext2_acl.h>
89 #include <fs/ext2fs/ext2fs.h>
90 #include <fs/ext2fs/ext2_extern.h>
91 #include <fs/ext2fs/ext2_dinode.h>
92 #include <fs/ext2fs/ext2_dir.h>
93 #include <fs/ext2fs/ext2_mount.h>
94 #include <fs/ext2fs/ext2_extattr.h>
95 #include <fs/ext2fs/ext2_extents.h>
97 SDT_PROVIDER_DECLARE(ext2fs);
100 * arg0: verbosity. Higher numbers give more verbose messages
101 * arg1: Textual message
103 SDT_PROBE_DEFINE2(ext2fs, , vnops, trace, "int", "char*");
105 static int ext2_makeinode(int mode, struct vnode *, struct vnode **, struct componentname *);
106 static void ext2_itimes_locked(struct vnode *);
108 static vop_access_t ext2_access;
109 static int ext2_chmod(struct vnode *, int, struct ucred *, struct thread *);
110 static int ext2_chown(struct vnode *, uid_t, gid_t, struct ucred *,
112 static vop_close_t ext2_close;
113 static vop_create_t ext2_create;
114 static vop_fsync_t ext2_fsync;
115 static vop_getattr_t ext2_getattr;
116 static vop_ioctl_t ext2_ioctl;
117 static vop_link_t ext2_link;
118 static vop_mkdir_t ext2_mkdir;
119 static vop_mknod_t ext2_mknod;
120 static vop_open_t ext2_open;
121 static vop_pathconf_t ext2_pathconf;
122 static vop_print_t ext2_print;
123 static vop_read_t ext2_read;
124 static vop_readlink_t ext2_readlink;
125 static vop_remove_t ext2_remove;
126 static vop_rename_t ext2_rename;
127 static vop_rmdir_t ext2_rmdir;
128 static vop_setattr_t ext2_setattr;
129 static vop_strategy_t ext2_strategy;
130 static vop_symlink_t ext2_symlink;
131 static vop_write_t ext2_write;
132 static vop_deleteextattr_t ext2_deleteextattr;
133 static vop_getextattr_t ext2_getextattr;
134 static vop_listextattr_t ext2_listextattr;
135 static vop_setextattr_t ext2_setextattr;
136 static vop_vptofh_t ext2_vptofh;
137 static vop_close_t ext2fifo_close;
138 static vop_kqfilter_t ext2fifo_kqfilter;
140 /* Global vfs data structures for ext2. */
141 struct vop_vector ext2_vnodeops = {
142 .vop_default = &default_vnodeops,
143 .vop_access = ext2_access,
144 .vop_bmap = ext2_bmap,
145 .vop_cachedlookup = ext2_lookup,
146 .vop_close = ext2_close,
147 .vop_create = ext2_create,
148 .vop_fsync = ext2_fsync,
149 .vop_getpages = vnode_pager_local_getpages,
150 .vop_getpages_async = vnode_pager_local_getpages_async,
151 .vop_getattr = ext2_getattr,
152 .vop_inactive = ext2_inactive,
153 .vop_ioctl = ext2_ioctl,
154 .vop_link = ext2_link,
155 .vop_lookup = vfs_cache_lookup,
156 .vop_mkdir = ext2_mkdir,
157 .vop_mknod = ext2_mknod,
158 .vop_open = ext2_open,
159 .vop_pathconf = ext2_pathconf,
160 .vop_poll = vop_stdpoll,
161 .vop_print = ext2_print,
162 .vop_read = ext2_read,
163 .vop_readdir = ext2_readdir,
164 .vop_readlink = ext2_readlink,
165 .vop_reallocblks = ext2_reallocblks,
166 .vop_reclaim = ext2_reclaim,
167 .vop_remove = ext2_remove,
168 .vop_rename = ext2_rename,
169 .vop_rmdir = ext2_rmdir,
170 .vop_setattr = ext2_setattr,
171 .vop_strategy = ext2_strategy,
172 .vop_symlink = ext2_symlink,
173 .vop_write = ext2_write,
174 .vop_deleteextattr = ext2_deleteextattr,
175 .vop_getextattr = ext2_getextattr,
176 .vop_listextattr = ext2_listextattr,
177 .vop_setextattr = ext2_setextattr,
179 .vop_getacl = ext2_getacl,
180 .vop_setacl = ext2_setacl,
181 .vop_aclcheck = ext2_aclcheck,
183 .vop_vptofh = ext2_vptofh,
186 struct vop_vector ext2_fifoops = {
187 .vop_default = &fifo_specops,
188 .vop_access = ext2_access,
189 .vop_close = ext2fifo_close,
190 .vop_fsync = ext2_fsync,
191 .vop_getattr = ext2_getattr,
192 .vop_inactive = ext2_inactive,
193 .vop_kqfilter = ext2fifo_kqfilter,
194 .vop_pathconf = ext2_pathconf,
195 .vop_print = ext2_print,
196 .vop_read = VOP_PANIC,
197 .vop_reclaim = ext2_reclaim,
198 .vop_setattr = ext2_setattr,
199 .vop_write = VOP_PANIC,
200 .vop_vptofh = ext2_vptofh,
204 * A virgin directory (no blushing please).
205 * Note that the type and namlen fields are reversed relative to ext2.
206 * Also, we don't use `struct odirtemplate', since it would just cause
207 * endianness problems.
209 static struct dirtemplate mastertemplate = {
210 0, 12, 1, EXT2_FT_DIR, ".",
211 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
213 static struct dirtemplate omastertemplate = {
214 0, 12, 1, EXT2_FT_UNKNOWN, ".",
215 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".."
219 ext2_itimes_locked(struct vnode *vp)
224 ASSERT_VI_LOCKED(vp, __func__);
227 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0)
229 if ((vp->v_type == VBLK || vp->v_type == VCHR))
230 ip->i_flag |= IN_LAZYMOD;
232 ip->i_flag |= IN_MODIFIED;
233 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
235 if (ip->i_flag & IN_ACCESS) {
236 ip->i_atime = ts.tv_sec;
237 ip->i_atimensec = ts.tv_nsec;
239 if (ip->i_flag & IN_UPDATE) {
240 ip->i_mtime = ts.tv_sec;
241 ip->i_mtimensec = ts.tv_nsec;
244 if (ip->i_flag & IN_CHANGE) {
245 ip->i_ctime = ts.tv_sec;
246 ip->i_ctimensec = ts.tv_nsec;
249 ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
253 ext2_itimes(struct vnode *vp)
257 ext2_itimes_locked(vp);
262 * Create a regular file
265 ext2_create(struct vop_create_args *ap)
270 ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
271 ap->a_dvp, ap->a_vpp, ap->a_cnp);
274 if ((ap->a_cnp->cn_flags & MAKEENTRY) != 0)
275 cache_enter(ap->a_dvp, *ap->a_vpp, ap->a_cnp);
280 ext2_open(struct vop_open_args *ap)
283 if (ap->a_vp->v_type == VBLK || ap->a_vp->v_type == VCHR)
287 * Files marked append-only must be opened for appending.
289 if ((VTOI(ap->a_vp)->i_flags & APPEND) &&
290 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
293 vnode_create_vobject(ap->a_vp, VTOI(ap->a_vp)->i_size, ap->a_td);
301 * Update the times on the inode.
304 ext2_close(struct vop_close_args *ap)
306 struct vnode *vp = ap->a_vp;
309 if (vp->v_usecount > 1)
310 ext2_itimes_locked(vp);
316 ext2_access(struct vop_access_args *ap)
318 struct vnode *vp = ap->a_vp;
319 struct inode *ip = VTOI(vp);
320 accmode_t accmode = ap->a_accmode;
323 if (vp->v_type == VBLK || vp->v_type == VCHR)
327 * Disallow write attempts on read-only file systems;
328 * unless the file is a socket, fifo, or a block or
329 * character device resident on the file system.
331 if (accmode & VWRITE) {
332 switch (vp->v_type) {
336 if (vp->v_mount->mnt_flag & MNT_RDONLY)
344 /* If immutable bit set, nobody gets to write it. */
345 if ((accmode & VWRITE) && (ip->i_flags & (SF_IMMUTABLE | SF_SNAPSHOT)))
348 error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid,
349 ap->a_accmode, ap->a_cred, NULL);
354 ext2_getattr(struct vop_getattr_args *ap)
356 struct vnode *vp = ap->a_vp;
357 struct inode *ip = VTOI(vp);
358 struct vattr *vap = ap->a_vap;
362 * Copy from inode table
364 vap->va_fsid = dev2udev(ip->i_devvp->v_rdev);
365 vap->va_fileid = ip->i_number;
366 vap->va_mode = ip->i_mode & ~IFMT;
367 vap->va_nlink = ip->i_nlink;
368 vap->va_uid = ip->i_uid;
369 vap->va_gid = ip->i_gid;
370 vap->va_rdev = ip->i_rdev;
371 vap->va_size = ip->i_size;
372 vap->va_atime.tv_sec = ip->i_atime;
373 vap->va_atime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_atimensec : 0;
374 vap->va_mtime.tv_sec = ip->i_mtime;
375 vap->va_mtime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_mtimensec : 0;
376 vap->va_ctime.tv_sec = ip->i_ctime;
377 vap->va_ctime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_ctimensec : 0;
378 if E2DI_HAS_XTIME(ip) {
379 vap->va_birthtime.tv_sec = ip->i_birthtime;
380 vap->va_birthtime.tv_nsec = ip->i_birthnsec;
382 vap->va_flags = ip->i_flags;
383 vap->va_gen = ip->i_gen;
384 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
385 vap->va_bytes = dbtob((u_quad_t)ip->i_blocks);
386 vap->va_type = IFTOVT(ip->i_mode);
387 vap->va_filerev = ip->i_modrev;
392 * Set attribute vnode op. called from several syscalls
395 ext2_setattr(struct vop_setattr_args *ap)
397 struct vattr *vap = ap->a_vap;
398 struct vnode *vp = ap->a_vp;
399 struct inode *ip = VTOI(vp);
400 struct ucred *cred = ap->a_cred;
401 struct thread *td = curthread;
405 * Check for unsettable attributes.
407 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
408 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
409 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
410 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
413 if (vap->va_flags != VNOVAL) {
414 /* Disallow flags not supported by ext2fs. */
415 if (vap->va_flags & ~(SF_APPEND | SF_IMMUTABLE | UF_NODUMP))
418 if (vp->v_mount->mnt_flag & MNT_RDONLY)
421 * Callers may only modify the file flags on objects they
422 * have VADMIN rights for.
424 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
427 * Unprivileged processes and privileged processes in
428 * jail() are not permitted to unset system flags, or
429 * modify flags if any system flags are set.
430 * Privileged non-jail processes may not modify system flags
431 * if securelevel > 0 and any existing system flags are set.
433 if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS)) {
434 if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) {
435 error = securelevel_gt(cred, 0);
440 if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND) ||
441 ((vap->va_flags ^ ip->i_flags) & SF_SETTABLE))
444 ip->i_flags = vap->va_flags;
445 ip->i_flag |= IN_CHANGE;
446 if (ip->i_flags & (IMMUTABLE | APPEND))
449 if (ip->i_flags & (IMMUTABLE | APPEND))
452 * Go through the fields and update iff not VNOVAL.
454 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
455 if (vp->v_mount->mnt_flag & MNT_RDONLY)
457 if ((error = ext2_chown(vp, vap->va_uid, vap->va_gid, cred,
461 if (vap->va_size != VNOVAL) {
463 * Disallow write attempts on read-only file systems;
464 * unless the file is a socket, fifo, or a block or
465 * character device resident on the file system.
467 switch (vp->v_type) {
472 if (vp->v_mount->mnt_flag & MNT_RDONLY)
478 if ((error = ext2_truncate(vp, vap->va_size, 0, cred, td)) != 0)
481 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
482 if (vp->v_mount->mnt_flag & MNT_RDONLY)
486 * If times is NULL, ... The caller must be the owner of
487 * the file, have permission to write the file, or be the
489 * If times is non-NULL, ... The caller must be the owner of
490 * the file or be the super-user.
492 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)) &&
493 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
494 (error = VOP_ACCESS(vp, VWRITE, cred, td))))
496 ip->i_flag |= IN_CHANGE | IN_MODIFIED;
497 if (vap->va_atime.tv_sec != VNOVAL) {
498 ip->i_flag &= ~IN_ACCESS;
499 ip->i_atime = vap->va_atime.tv_sec;
500 ip->i_atimensec = vap->va_atime.tv_nsec;
502 if (vap->va_mtime.tv_sec != VNOVAL) {
503 ip->i_flag &= ~IN_UPDATE;
504 ip->i_mtime = vap->va_mtime.tv_sec;
505 ip->i_mtimensec = vap->va_mtime.tv_nsec;
507 ip->i_birthtime = vap->va_birthtime.tv_sec;
508 ip->i_birthnsec = vap->va_birthtime.tv_nsec;
509 error = ext2_update(vp, 0);
514 if (vap->va_mode != (mode_t)VNOVAL) {
515 if (vp->v_mount->mnt_flag & MNT_RDONLY)
517 error = ext2_chmod(vp, (int)vap->va_mode, cred, td);
523 * Change the mode on a file.
524 * Inode must be locked before calling.
527 ext2_chmod(struct vnode *vp, int mode, struct ucred *cred, struct thread *td)
529 struct inode *ip = VTOI(vp);
533 * To modify the permissions on a file, must possess VADMIN
536 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
539 * Privileged processes may set the sticky bit on non-directories,
540 * as well as set the setgid bit on a file with a group that the
541 * process is not a member of.
543 if (vp->v_type != VDIR && (mode & S_ISTXT)) {
544 error = priv_check_cred(cred, PRIV_VFS_STICKYFILE);
548 if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) {
549 error = priv_check_cred(cred, PRIV_VFS_SETGID);
553 ip->i_mode &= ~ALLPERMS;
554 ip->i_mode |= (mode & ALLPERMS);
555 ip->i_flag |= IN_CHANGE;
560 * Perform chown operation on inode ip;
561 * inode must be locked prior to call.
564 ext2_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred,
567 struct inode *ip = VTOI(vp);
572 if (uid == (uid_t)VNOVAL)
574 if (gid == (gid_t)VNOVAL)
577 * To modify the ownership of a file, must possess VADMIN
580 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
583 * To change the owner of a file, or change the group of a file
584 * to a group of which we are not a member, the caller must
587 if (uid != ip->i_uid || (gid != ip->i_gid &&
588 !groupmember(gid, cred))) {
589 error = priv_check_cred(cred, PRIV_VFS_CHOWN);
597 ip->i_flag |= IN_CHANGE;
598 if ((ip->i_mode & (ISUID | ISGID)) && (ouid != uid || ogid != gid)) {
599 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID) != 0)
600 ip->i_mode &= ~(ISUID | ISGID);
606 * Synch an open file.
610 ext2_fsync(struct vop_fsync_args *ap)
613 * Flush all dirty buffers associated with a vnode.
618 return (ext2_update(ap->a_vp, ap->a_waitfor == MNT_WAIT));
626 ext2_mknod(struct vop_mknod_args *ap)
628 struct vattr *vap = ap->a_vap;
629 struct vnode **vpp = ap->a_vpp;
634 error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
635 ap->a_dvp, vpp, ap->a_cnp);
639 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
640 if (vap->va_rdev != VNOVAL) {
642 * Want to be able to use this to make badblock
643 * inodes, so don't truncate the dev number.
645 if (!(ip->i_flag & IN_E4EXTENTS))
646 ip->i_rdev = vap->va_rdev;
649 * Remove inode, then reload it through VFS_VGET so it is
650 * checked to see if it is an alias of an existing entry in
651 * the inode cache. XXX I don't believe this is necessary now.
653 (*vpp)->v_type = VNON;
654 ino = ip->i_number; /* Save this before vgone() invalidates ip. */
657 error = VFS_VGET(ap->a_dvp->v_mount, ino, LK_EXCLUSIVE, vpp);
666 ext2_remove(struct vop_remove_args *ap)
669 struct vnode *vp = ap->a_vp;
670 struct vnode *dvp = ap->a_dvp;
674 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
675 (VTOI(dvp)->i_flags & APPEND)) {
679 error = ext2_dirremove(dvp, ap->a_cnp);
682 ip->i_flag |= IN_CHANGE;
692 ext2_link(struct vop_link_args *ap)
694 struct vnode *vp = ap->a_vp;
695 struct vnode *tdvp = ap->a_tdvp;
696 struct componentname *cnp = ap->a_cnp;
701 if ((cnp->cn_flags & HASBUF) == 0)
702 panic("ext2_link: no name");
705 if ((nlink_t)ip->i_nlink >= EXT4_LINK_MAX) {
709 if (ip->i_flags & (IMMUTABLE | APPEND)) {
714 ip->i_flag |= IN_CHANGE;
715 error = ext2_update(vp, !DOINGASYNC(vp));
717 error = ext2_direnter(ip, tdvp, cnp);
720 ip->i_flag |= IN_CHANGE;
727 ext2_inc_nlink(struct inode *ip)
732 if (S_ISDIR(ip->i_mode) &&
733 EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, EXT2F_ROCOMPAT_DIR_NLINK) &&
735 if (ip->i_nlink >= EXT4_LINK_MAX || ip->i_nlink == 2)
737 } else if (ip->i_nlink > EXT4_LINK_MAX) {
746 ext2_dec_nlink(struct inode *ip)
749 if (!S_ISDIR(ip->i_mode) || ip->i_nlink > 2)
754 * Rename system call.
755 * rename("foo", "bar");
758 * link("foo", "bar");
760 * but ``atomically''. Can't do full commit without saving state in the
761 * inode on disk which isn't feasible at this time. Best we can do is
762 * always guarantee the target exists.
764 * Basic algorithm is:
766 * 1) Bump link count on source while we're linking it to the
767 * target. This also ensure the inode won't be deleted out
768 * from underneath us while we work (it may be truncated by
769 * a concurrent `trunc' or `open' for creation).
770 * 2) Link source to destination. If destination already exists,
772 * 3) Unlink source reference to inode if still around. If a
773 * directory was moved and the parent of the destination
774 * is different from the source, patch the ".." entry in the
778 ext2_rename(struct vop_rename_args *ap)
780 struct vnode *tvp = ap->a_tvp;
781 struct vnode *tdvp = ap->a_tdvp;
782 struct vnode *fvp = ap->a_fvp;
783 struct vnode *fdvp = ap->a_fdvp;
784 struct componentname *tcnp = ap->a_tcnp;
785 struct componentname *fcnp = ap->a_fcnp;
786 struct inode *ip, *xp, *dp;
787 struct dirtemplate *dirbuf;
788 int doingdirectory = 0, oldparent = 0, newparent = 0;
793 if ((tcnp->cn_flags & HASBUF) == 0 ||
794 (fcnp->cn_flags & HASBUF) == 0)
795 panic("ext2_rename: no name");
798 * Check for cross-device rename.
800 if ((fvp->v_mount != tdvp->v_mount) ||
801 (tvp && (fvp->v_mount != tvp->v_mount))) {
815 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
816 (VTOI(tdvp)->i_flags & APPEND))) {
822 * Renaming a file to itself has no effect. The upper layers should
823 * not call us in that case. Temporarily just warn if they do.
826 SDT_PROBE2(ext2fs, , vnops, trace, 1,
827 "rename: fvp == tvp (can't happen)");
832 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0)
836 if (ip->i_nlink >= EXT4_LINK_MAX &&
837 !EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, EXT2F_ROCOMPAT_DIR_NLINK)) {
842 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
843 || (dp->i_flags & APPEND)) {
848 if ((ip->i_mode & IFMT) == IFDIR) {
850 * Avoid ".", "..", and aliases of "." for obvious reasons.
852 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
853 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT ||
854 (ip->i_flag & IN_RENAME)) {
859 ip->i_flag |= IN_RENAME;
860 oldparent = dp->i_number;
866 * When the target exists, both the directory
867 * and target vnodes are returned locked.
875 * 1) Bump link count while we're moving stuff
876 * around. If we crash somewhere before
877 * completing our work, the link count
878 * may be wrong, but correctable.
881 ip->i_flag |= IN_CHANGE;
882 if ((error = ext2_update(fvp, !DOINGASYNC(fvp))) != 0) {
888 * If ".." must be changed (ie the directory gets a new
889 * parent) then the source directory must not be in the
890 * directory hierarchy above the target, as this would
891 * orphan everything below the source directory. Also
892 * the user must have write permission in the source so
893 * as to be able to change "..". We must repeat the call
894 * to namei, as the parent directory is unlocked by the
895 * call to checkpath().
897 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
899 if (oldparent != dp->i_number)
900 newparent = dp->i_number;
901 if (doingdirectory && newparent) {
902 if (error) /* write access check above */
906 error = ext2_checkpath(ip, dp, tcnp->cn_cred);
910 error = relookup(tdvp, &tvp, tcnp);
920 * 2) If target doesn't exist, link the target
921 * to the source and unlink the source.
922 * Otherwise, rewrite the target directory
923 * entry to reference the source inode and
924 * expunge the original entry's existence.
927 if (dp->i_devvp != ip->i_devvp)
928 panic("ext2_rename: EXDEV");
930 * Account for ".." in new directory.
931 * When source and destination have the same
932 * parent we don't fool with the link count.
934 if (doingdirectory && newparent) {
935 error = ext2_inc_nlink(dp);
939 dp->i_flag |= IN_CHANGE;
940 error = ext2_update(tdvp, !DOINGASYNC(tdvp));
944 error = ext2_direnter(ip, tdvp, tcnp);
946 if (doingdirectory && newparent) {
948 dp->i_flag |= IN_CHANGE;
949 (void)ext2_update(tdvp, 1);
955 if (xp->i_devvp != dp->i_devvp || xp->i_devvp != ip->i_devvp)
956 panic("ext2_rename: EXDEV");
958 * Short circuit rename(foo, foo).
960 if (xp->i_number == ip->i_number)
961 panic("ext2_rename: same file");
963 * If the parent directory is "sticky", then the user must
964 * own the parent directory, or the destination of the rename,
965 * otherwise the destination may not be changed (except by
966 * root). This implements append-only directories.
968 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
969 tcnp->cn_cred->cr_uid != dp->i_uid &&
970 xp->i_uid != tcnp->cn_cred->cr_uid) {
975 * Target must be empty if a directory and have no links
976 * to it. Also, ensure source and target are compatible
977 * (both directories, or both not directories).
979 if ((xp->i_mode & IFMT) == IFDIR) {
980 if (!ext2_dirempty(xp, dp->i_number, tcnp->cn_cred)) {
984 if (!doingdirectory) {
989 } else if (doingdirectory) {
993 error = ext2_dirrewrite(dp, ip, tcnp);
997 * If the target directory is in the same
998 * directory as the source directory,
999 * decrement the link count on the parent
1000 * of the target directory.
1002 if (doingdirectory && !newparent) {
1004 dp->i_flag |= IN_CHANGE;
1008 * Adjust the link count of the target to
1009 * reflect the dirrewrite above. If this is
1010 * a directory it is empty and there are
1011 * no links to it, so we can squash the inode and
1012 * any space associated with it. We disallowed
1013 * renaming over top of a directory with links to
1014 * it above, as the remaining link would point to
1015 * a directory without "." or ".." entries.
1018 if (doingdirectory) {
1019 if (--xp->i_nlink != 0)
1020 panic("ext2_rename: linked directory");
1021 error = ext2_truncate(tvp, (off_t)0, IO_SYNC,
1022 tcnp->cn_cred, tcnp->cn_thread);
1024 xp->i_flag |= IN_CHANGE;
1030 * 3) Unlink the source.
1032 fcnp->cn_flags &= ~MODMASK;
1033 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1035 error = relookup(fdvp, &fvp, fcnp);
1043 * From name has disappeared. IN_RENAME is not sufficient
1044 * to protect against directory races due to timing windows,
1045 * so we can't panic here.
1051 * Ensure that the directory entry still exists and has not
1052 * changed while the new name has been entered. If the source is
1053 * a file then the entry may have been unlinked or renamed. In
1054 * either case there is no further work to be done. If the source
1055 * is a directory then it cannot have been rmdir'ed; its link
1056 * count of three would cause a rmdir to fail with ENOTEMPTY.
1057 * The IN_RENAME flag ensures that it cannot be moved by another
1062 * From name resolves to a different inode. IN_RENAME is
1063 * not sufficient protection against timing window races
1064 * so we can't panic here.
1068 * If the source is a directory with a
1069 * new parent, the link count of the old
1070 * parent directory must be decremented
1071 * and ".." set to point to the new parent.
1073 if (doingdirectory && newparent) {
1075 dp->i_flag |= IN_CHANGE;
1076 dirbuf = malloc(dp->i_e2fs->e2fs_bsize, M_TEMP, M_WAITOK | M_ZERO);
1081 error = vn_rdwr(UIO_READ, fvp, (caddr_t)dirbuf,
1082 ip->i_e2fs->e2fs_bsize, (off_t)0,
1083 UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK,
1084 tcnp->cn_cred, NOCRED, NULL, NULL);
1086 /* Like ufs little-endian: */
1087 namlen = dirbuf->dotdot_type;
1089 dirbuf->dotdot_name[0] != '.' ||
1090 dirbuf->dotdot_name[1] != '.') {
1091 ext2_dirbad(xp, (doff_t)12,
1092 "rename: mangled dir");
1094 dirbuf->dotdot_ino = newparent;
1096 * dirblock 0 could be htree root,
1097 * try both csum update functions.
1099 ext2_dirent_csum_set(ip,
1100 (struct ext2fs_direct_2 *)dirbuf);
1101 ext2_dx_csum_set(ip,
1102 (struct ext2fs_direct_2 *)dirbuf);
1103 (void)vn_rdwr(UIO_WRITE, fvp,
1105 ip->i_e2fs->e2fs_bsize,
1106 (off_t)0, UIO_SYSSPACE,
1107 IO_NODELOCKED | IO_SYNC |
1108 IO_NOMACCHECK, tcnp->cn_cred,
1109 NOCRED, NULL, NULL);
1113 free(dirbuf, M_TEMP);
1115 error = ext2_dirremove(fdvp, fcnp);
1118 xp->i_flag |= IN_CHANGE;
1120 xp->i_flag &= ~IN_RENAME;
1135 ip->i_flag &= ~IN_RENAME;
1136 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) {
1138 ip->i_flag |= IN_CHANGE;
1139 ip->i_flag &= ~IN_RENAME;
1148 ext2_do_posix1e_acl_inheritance_dir(struct vnode *dvp, struct vnode *tvp,
1149 mode_t dmode, struct ucred *cred, struct thread *td)
1152 struct inode *ip = VTOI(tvp);
1153 struct acl *dacl, *acl;
1155 acl = acl_alloc(M_WAITOK);
1156 dacl = acl_alloc(M_WAITOK);
1159 * Retrieve default ACL from parent, if any.
1161 error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cred, td);
1165 * Retrieved a default ACL, so merge mode and ACL if
1166 * necessary. If the ACL is empty, fall through to
1167 * the "not defined or available" case.
1169 if (acl->acl_cnt != 0) {
1170 dmode = acl_posix1e_newfilemode(dmode, acl);
1173 ext2_sync_acl_from_inode(ip, acl);
1180 * Just use the mode as-is.
1190 error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cred, td);
1192 error = VOP_SETACL(tvp, ACL_TYPE_DEFAULT, dacl, cred, td);
1199 * XXX: This should not happen, as EOPNOTSUPP above
1200 * was supposed to free acl.
1203 printf("ext2_mkdir: VOP_GETACL() but no VOP_SETACL()\n");
1219 ext2_do_posix1e_acl_inheritance_file(struct vnode *dvp, struct vnode *tvp,
1220 mode_t mode, struct ucred *cred, struct thread *td)
1223 struct inode *ip = VTOI(tvp);
1226 acl = acl_alloc(M_WAITOK);
1229 * Retrieve default ACL for parent, if any.
1231 error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cred, td);
1235 * Retrieved a default ACL, so merge mode and ACL if
1238 if (acl->acl_cnt != 0) {
1240 * Two possible ways for default ACL to not
1241 * be present. First, the EA can be
1242 * undefined, or second, the default ACL can
1243 * be blank. If it's blank, fall through to
1244 * the it's not defined case.
1246 mode = acl_posix1e_newfilemode(mode, acl);
1248 ext2_sync_acl_from_inode(ip, acl);
1255 * Just use the mode as-is.
1265 error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cred, td);
1272 * XXX: This should not happen, as EOPNOTSUPP above was
1273 * supposed to free acl.
1275 printf("ufs_do_posix1e_acl_inheritance_file: VOP_GETACL() "
1276 "but no VOP_SETACL()\n");
1277 /* panic("ufs_do_posix1e_acl_inheritance_file: VOP_GETACL() "
1278 "but no VOP_SETACL()"); */
1291 #endif /* UFS_ACL */
1297 ext2_mkdir(struct vop_mkdir_args *ap)
1299 struct m_ext2fs *fs;
1300 struct vnode *dvp = ap->a_dvp;
1301 struct vattr *vap = ap->a_vap;
1302 struct componentname *cnp = ap->a_cnp;
1303 struct inode *ip, *dp;
1305 struct dirtemplate dirtemplate, *dtp;
1310 if ((cnp->cn_flags & HASBUF) == 0)
1311 panic("ext2_mkdir: no name");
1314 if ((nlink_t)dp->i_nlink >= EXT4_LINK_MAX &&
1315 !EXT2_HAS_RO_COMPAT_FEATURE(dp->i_e2fs, EXT2F_ROCOMPAT_DIR_NLINK)) {
1319 dmode = vap->va_mode & 0777;
1322 * Must simulate part of ext2_makeinode here to acquire the inode,
1323 * but not have it entered in the parent directory. The entry is
1324 * made later after writing "." and ".." entries.
1326 error = ext2_valloc(dvp, dmode, cnp->cn_cred, &tvp);
1331 ip->i_gid = dp->i_gid;
1335 * if we are hacking owners here, (only do this where told to)
1336 * and we are not giving it TOO root, (would subvert quotas)
1337 * then go ahead and give it to the other user.
1338 * The new directory also inherits the SUID bit.
1339 * If user's UID and dir UID are the same,
1340 * 'give it away' so that the SUID is still forced on.
1342 if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1343 (dp->i_mode & ISUID) && dp->i_uid) {
1345 ip->i_uid = dp->i_uid;
1347 ip->i_uid = cnp->cn_cred->cr_uid;
1351 ip->i_uid = cnp->cn_cred->cr_uid;
1353 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1355 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
1357 if (cnp->cn_flags & ISWHITEOUT)
1358 ip->i_flags |= UF_OPAQUE;
1359 error = ext2_update(tvp, 1);
1362 * Bump link count in parent directory
1363 * to reflect work done below. Should
1364 * be done before reference is created
1365 * so reparation is possible if we crash.
1368 dp->i_flag |= IN_CHANGE;
1369 error = ext2_update(dvp, !DOINGASYNC(dvp));
1373 /* Initialize directory with "." and ".." from static template. */
1374 if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs,
1375 EXT2F_INCOMPAT_FTYPE))
1376 dtp = &mastertemplate;
1378 dtp = &omastertemplate;
1380 dirtemplate.dot_ino = ip->i_number;
1381 dirtemplate.dotdot_ino = dp->i_number;
1383 * note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE so let's
1384 * just redefine it - for this function only
1387 #define DIRBLKSIZ VTOI(dvp)->i_e2fs->e2fs_bsize
1388 dirtemplate.dotdot_reclen = DIRBLKSIZ - 12;
1389 buf = malloc(DIRBLKSIZ, M_TEMP, M_WAITOK | M_ZERO);
1393 dp->i_flag |= IN_CHANGE;
1396 if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_METADATA_CKSUM)) {
1397 dirtemplate.dotdot_reclen -= sizeof(struct ext2fs_direct_tail);
1398 ext2_init_dirent_tail(EXT2_DIRENT_TAIL(buf, DIRBLKSIZ));
1400 memcpy(buf, &dirtemplate, sizeof(dirtemplate));
1401 ext2_dirent_csum_set(ip, (struct ext2fs_direct_2 *)buf);
1402 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)buf,
1403 DIRBLKSIZ, (off_t)0, UIO_SYSSPACE,
1404 IO_NODELOCKED | IO_SYNC | IO_NOMACCHECK, cnp->cn_cred, NOCRED,
1408 dp->i_flag |= IN_CHANGE;
1411 if (DIRBLKSIZ > VFSTOEXT2(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
1412 /* XXX should grow with balloc() */
1413 panic("ext2_mkdir: blksize");
1415 ip->i_size = DIRBLKSIZ;
1416 ip->i_flag |= IN_CHANGE;
1420 if (dvp->v_mount->mnt_flag & MNT_ACLS) {
1421 error = ext2_do_posix1e_acl_inheritance_dir(dvp, tvp, dmode,
1422 cnp->cn_cred, cnp->cn_thread);
1427 #endif /* UFS_ACL */
1429 /* Directory set up, now install its entry in the parent directory. */
1430 error = ext2_direnter(ip, dvp, cnp);
1433 dp->i_flag |= IN_CHANGE;
1437 * No need to do an explicit VOP_TRUNCATE here, vrele will do this
1438 * for us because we set the link count to 0.
1442 ip->i_flag |= IN_CHANGE;
1450 #define DIRBLKSIZ DEV_BSIZE
1454 * Rmdir system call.
1457 ext2_rmdir(struct vop_rmdir_args *ap)
1459 struct vnode *vp = ap->a_vp;
1460 struct vnode *dvp = ap->a_dvp;
1461 struct componentname *cnp = ap->a_cnp;
1462 struct inode *ip, *dp;
1469 * Verify the directory is empty (and valid).
1470 * (Rmdir ".." won't be valid since
1471 * ".." will contain a reference to
1472 * the current directory and thus be
1475 if (!ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) {
1479 if ((dp->i_flags & APPEND)
1480 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1485 * Delete reference to directory before purging
1486 * inode. If we crash in between, the directory
1487 * will be reattached to lost+found,
1489 error = ext2_dirremove(dvp, cnp);
1493 dp->i_flag |= IN_CHANGE;
1497 * Truncate inode. The only stuff left
1498 * in the directory is "." and "..".
1501 error = ext2_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred,
1503 cache_purge(ITOV(ip));
1504 if (vn_lock(dvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) {
1506 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1507 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1514 * symlink -- make a symbolic link
1517 ext2_symlink(struct vop_symlink_args *ap)
1519 struct vnode *vp, **vpp = ap->a_vpp;
1523 error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1528 len = strlen(ap->a_target);
1529 if (len < vp->v_mount->mnt_maxsymlinklen) {
1531 bcopy(ap->a_target, (char *)ip->i_shortlink, len);
1533 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1535 error = vn_rdwr(UIO_WRITE, vp, __DECONST(void *, ap->a_target),
1536 len, (off_t)0, UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK,
1537 ap->a_cnp->cn_cred, NOCRED, NULL, NULL);
1544 * Return target name of a symbolic link
1547 ext2_readlink(struct vop_readlink_args *ap)
1549 struct vnode *vp = ap->a_vp;
1550 struct inode *ip = VTOI(vp);
1554 if (isize < vp->v_mount->mnt_maxsymlinklen) {
1555 uiomove((char *)ip->i_shortlink, isize, ap->a_uio);
1558 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
1562 * Calculate the logical to physical mapping if not done already,
1563 * then call the device strategy routine.
1565 * In order to be able to swap to a file, the ext2_bmaparray() operation may not
1566 * deadlock on memory. See ext2_bmap() for details.
1569 ext2_strategy(struct vop_strategy_args *ap)
1571 struct buf *bp = ap->a_bp;
1572 struct vnode *vp = ap->a_vp;
1577 if (vp->v_type == VBLK || vp->v_type == VCHR)
1578 panic("ext2_strategy: spec");
1579 if (bp->b_blkno == bp->b_lblkno) {
1581 if (VTOI(ap->a_vp)->i_flag & IN_E4EXTENTS)
1582 error = ext4_bmapext(vp, bp->b_lblkno, &blkno, NULL, NULL);
1584 error = ext2_bmaparray(vp, bp->b_lblkno, &blkno, NULL, NULL);
1586 bp->b_blkno = blkno;
1588 bp->b_error = error;
1589 bp->b_ioflags |= BIO_ERROR;
1593 if ((long)bp->b_blkno == -1)
1596 if ((long)bp->b_blkno == -1) {
1600 bp->b_iooffset = dbtob(bp->b_blkno);
1601 bo = VFSTOEXT2(vp->v_mount)->um_bo;
1602 BO_STRATEGY(bo, bp);
1607 * Print out the contents of an inode.
1610 ext2_print(struct vop_print_args *ap)
1612 struct vnode *vp = ap->a_vp;
1613 struct inode *ip = VTOI(vp);
1615 vn_printf(ip->i_devvp, "\tino %ju", (uintmax_t)ip->i_number);
1616 if (vp->v_type == VFIFO)
1623 * Close wrapper for fifos.
1625 * Update the times on the inode then do device close.
1628 ext2fifo_close(struct vop_close_args *ap)
1630 struct vnode *vp = ap->a_vp;
1633 if (vp->v_usecount > 1)
1634 ext2_itimes_locked(vp);
1636 return (fifo_specops.vop_close(ap));
1640 * Kqfilter wrapper for fifos.
1642 * Fall through to ext2 kqfilter routines if needed
1645 ext2fifo_kqfilter(struct vop_kqfilter_args *ap)
1649 error = fifo_specops.vop_kqfilter(ap);
1651 error = vfs_kqfilter(ap);
1656 * Return POSIX pathconf information applicable to ext2 filesystems.
1659 ext2_pathconf(struct vop_pathconf_args *ap)
1663 switch (ap->a_name) {
1665 if (EXT2_HAS_RO_COMPAT_FEATURE(VTOI(ap->a_vp)->i_e2fs,
1666 EXT2F_ROCOMPAT_DIR_NLINK))
1667 *ap->a_retval = INT_MAX;
1669 *ap->a_retval = EXT4_LINK_MAX;
1672 *ap->a_retval = NAME_MAX;
1675 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO)
1676 *ap->a_retval = PIPE_BUF;
1680 case _PC_CHOWN_RESTRICTED:
1688 case _PC_ACL_EXTENDED:
1689 if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS)
1694 case _PC_ACL_PATH_MAX:
1695 if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS)
1696 *ap->a_retval = ACL_MAX_ENTRIES;
1700 #endif /* UFS_ACL */
1702 case _PC_MIN_HOLE_SIZE:
1703 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
1711 case _PC_ALLOC_SIZE_MIN:
1712 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_bsize;
1714 case _PC_FILESIZEBITS:
1717 case _PC_REC_INCR_XFER_SIZE:
1718 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
1720 case _PC_REC_MAX_XFER_SIZE:
1721 *ap->a_retval = -1; /* means ``unlimited'' */
1723 case _PC_REC_MIN_XFER_SIZE:
1724 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
1726 case _PC_REC_XFER_ALIGN:
1727 *ap->a_retval = PAGE_SIZE;
1729 case _PC_SYMLINK_MAX:
1730 *ap->a_retval = MAXPATHLEN;
1734 error = vop_stdpathconf(ap);
1741 * Vnode operation to remove a named attribute.
1744 ext2_deleteextattr(struct vop_deleteextattr_args *ap)
1747 struct m_ext2fs *fs;
1750 ip = VTOI(ap->a_vp);
1753 if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR))
1754 return (EOPNOTSUPP);
1756 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1757 return (EOPNOTSUPP);
1759 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1760 ap->a_cred, ap->a_td, VWRITE);
1766 if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) {
1767 error = ext2_extattr_inode_delete(ip, ap->a_attrnamespace, ap->a_name);
1768 if (error != ENOATTR)
1773 error = ext2_extattr_block_delete(ip, ap->a_attrnamespace, ap->a_name);
1779 * Vnode operation to retrieve a named extended attribute.
1782 ext2_getextattr(struct vop_getextattr_args *ap)
1785 struct m_ext2fs *fs;
1788 ip = VTOI(ap->a_vp);
1791 if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR))
1792 return (EOPNOTSUPP);
1794 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1795 return (EOPNOTSUPP);
1797 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1798 ap->a_cred, ap->a_td, VREAD);
1802 if (ap->a_size != NULL)
1807 if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) {
1808 error = ext2_extattr_inode_get(ip, ap->a_attrnamespace,
1809 ap->a_name, ap->a_uio, ap->a_size);
1810 if (error != ENOATTR)
1815 error = ext2_extattr_block_get(ip, ap->a_attrnamespace,
1816 ap->a_name, ap->a_uio, ap->a_size);
1822 * Vnode operation to retrieve extended attributes on a vnode.
1825 ext2_listextattr(struct vop_listextattr_args *ap)
1828 struct m_ext2fs *fs;
1831 ip = VTOI(ap->a_vp);
1834 if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR))
1835 return (EOPNOTSUPP);
1837 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1838 return (EOPNOTSUPP);
1840 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1841 ap->a_cred, ap->a_td, VREAD);
1845 if (ap->a_size != NULL)
1848 if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) {
1849 error = ext2_extattr_inode_list(ip, ap->a_attrnamespace,
1850 ap->a_uio, ap->a_size);
1856 error = ext2_extattr_block_list(ip, ap->a_attrnamespace,
1857 ap->a_uio, ap->a_size);
1863 * Vnode operation to set a named attribute.
1866 ext2_setextattr(struct vop_setextattr_args *ap)
1869 struct m_ext2fs *fs;
1872 ip = VTOI(ap->a_vp);
1875 if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR))
1876 return (EOPNOTSUPP);
1878 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1879 return (EOPNOTSUPP);
1881 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1882 ap->a_cred, ap->a_td, VWRITE);
1886 error = ext2_extattr_valid_attrname(ap->a_attrnamespace, ap->a_name);
1890 if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) {
1891 error = ext2_extattr_inode_set(ip, ap->a_attrnamespace,
1892 ap->a_name, ap->a_uio);
1893 if (error != ENOSPC)
1897 error = ext2_extattr_block_set(ip, ap->a_attrnamespace,
1898 ap->a_name, ap->a_uio);
1904 * Vnode pointer to File handle
1908 ext2_vptofh(struct vop_vptofh_args *ap)
1913 ip = VTOI(ap->a_vp);
1914 ufhp = (struct ufid *)ap->a_fhp;
1915 ufhp->ufid_len = sizeof(struct ufid);
1916 ufhp->ufid_ino = ip->i_number;
1917 ufhp->ufid_gen = ip->i_gen;
1922 * Initialize the vnode associated with a new inode, handle aliased
1926 ext2_vinit(struct mount *mntp, struct vop_vector *fifoops, struct vnode **vpp)
1933 vp->v_type = IFTOVT(ip->i_mode);
1935 * Only unallocated inodes should be of type VNON.
1937 if (ip->i_mode != 0 && vp->v_type == VNON)
1939 if (vp->v_type == VFIFO)
1942 if (ip->i_number == EXT2_ROOTINO)
1943 vp->v_vflag |= VV_ROOT;
1944 ip->i_modrev = init_va_filerev();
1950 * Allocate a new inode.
1953 ext2_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
1954 struct componentname *cnp)
1956 struct inode *ip, *pdir;
1962 if ((cnp->cn_flags & HASBUF) == 0)
1963 panic("ext2_makeinode: no name");
1966 if ((mode & IFMT) == 0)
1969 error = ext2_valloc(dvp, mode, cnp->cn_cred, &tvp);
1974 ip->i_gid = pdir->i_gid;
1979 * not the owner of the directory,
1980 * and we are hacking owners here, (only do this where told to)
1981 * and we are not giving it TOO root, (would subvert quotas)
1982 * then go ahead and give it to the other user.
1983 * Note that this drops off the execute bits for security.
1985 if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1986 (pdir->i_mode & ISUID) &&
1987 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
1988 ip->i_uid = pdir->i_uid;
1991 ip->i_uid = cnp->cn_cred->cr_uid;
1995 ip->i_uid = cnp->cn_cred->cr_uid;
1997 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1999 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
2001 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred)) {
2002 if (priv_check_cred(cnp->cn_cred, PRIV_VFS_RETAINSUGID))
2003 ip->i_mode &= ~ISGID;
2006 if (cnp->cn_flags & ISWHITEOUT)
2007 ip->i_flags |= UF_OPAQUE;
2010 * Make sure inode goes to disk before directory entry.
2012 error = ext2_update(tvp, !DOINGASYNC(tvp));
2017 if (dvp->v_mount->mnt_flag & MNT_ACLS) {
2018 error = ext2_do_posix1e_acl_inheritance_file(dvp, tvp, mode,
2019 cnp->cn_cred, cnp->cn_thread);
2023 #endif /* UFS_ACL */
2025 error = ext2_direnter(ip, dvp, cnp);
2034 * Write error occurred trying to update the inode
2035 * or the directory so must deallocate the inode.
2038 ip->i_flag |= IN_CHANGE;
2044 * Vnode op for reading.
2047 ext2_read(struct vop_read_args *ap)
2052 struct m_ext2fs *fs;
2054 daddr_t lbn, nextlbn;
2056 long size, xfersize, blkoffset;
2057 int error, orig_resid, seqcount;
2062 ioflag = ap->a_ioflag;
2064 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
2068 if (uio->uio_rw != UIO_READ)
2069 panic("%s: mode", "ext2_read");
2071 if (vp->v_type == VLNK) {
2072 if ((int)ip->i_size < vp->v_mount->mnt_maxsymlinklen)
2073 panic("%s: short symlink", "ext2_read");
2074 } else if (vp->v_type != VREG && vp->v_type != VDIR)
2075 panic("%s: type %d", "ext2_read", vp->v_type);
2077 orig_resid = uio->uio_resid;
2078 KASSERT(orig_resid >= 0, ("ext2_read: uio->uio_resid < 0"));
2079 if (orig_resid == 0)
2081 KASSERT(uio->uio_offset >= 0, ("ext2_read: uio->uio_offset < 0"));
2083 if (uio->uio_offset < ip->i_size &&
2084 uio->uio_offset >= fs->e2fs_maxfilesize)
2087 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
2088 if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0)
2090 lbn = lblkno(fs, uio->uio_offset);
2092 size = blksize(fs, ip, lbn);
2093 blkoffset = blkoff(fs, uio->uio_offset);
2095 xfersize = fs->e2fs_fsize - blkoffset;
2096 if (uio->uio_resid < xfersize)
2097 xfersize = uio->uio_resid;
2098 if (bytesinfile < xfersize)
2099 xfersize = bytesinfile;
2101 if (lblktosize(fs, nextlbn) >= ip->i_size)
2102 error = bread(vp, lbn, size, NOCRED, &bp);
2103 else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
2104 error = cluster_read(vp, ip->i_size, lbn, size,
2105 NOCRED, blkoffset + uio->uio_resid, seqcount,
2107 } else if (seqcount > 1) {
2108 u_int nextsize = blksize(fs, ip, nextlbn);
2110 error = breadn(vp, lbn,
2111 size, &nextlbn, &nextsize, 1, NOCRED, &bp);
2113 error = bread(vp, lbn, size, NOCRED, &bp);
2121 * We should only get non-zero b_resid when an I/O error
2122 * has occurred, which should cause us to break above.
2123 * However, if the short read did not cause an error,
2124 * then we want to ensure that we do not uiomove bad
2125 * or uninitialized data.
2127 size -= bp->b_resid;
2128 if (size < xfersize) {
2133 error = uiomove((char *)bp->b_data + blkoffset,
2134 (int)xfersize, uio);
2137 vfs_bio_brelse(bp, ioflag);
2141 * This can only happen in the case of an error because the loop
2142 * above resets bp to NULL on each iteration and on normal
2143 * completion has not set a new value into it. so it must have come
2144 * from a 'break' statement
2147 vfs_bio_brelse(bp, ioflag);
2149 if ((error == 0 || uio->uio_resid != orig_resid) &&
2150 (vp->v_mount->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0)
2151 ip->i_flag |= IN_ACCESS;
2156 ext2_ioctl(struct vop_ioctl_args *ap)
2159 switch (ap->a_command) {
2162 return (vn_bmap_seekhole(ap->a_vp, ap->a_command,
2163 (off_t *)ap->a_data, ap->a_cred));
2170 * Vnode op for writing.
2173 ext2_write(struct vop_write_args *ap)
2178 struct m_ext2fs *fs;
2182 int blkoffset, error, flags, ioflag, resid, size, seqcount, xfersize;
2184 ioflag = ap->a_ioflag;
2188 seqcount = ioflag >> IO_SEQSHIFT;
2192 if (uio->uio_rw != UIO_WRITE)
2193 panic("%s: mode", "ext2_write");
2196 switch (vp->v_type) {
2198 if (ioflag & IO_APPEND)
2199 uio->uio_offset = ip->i_size;
2200 if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size)
2206 /* XXX differs from ffs -- this is called from ext2_mkdir(). */
2207 if ((ioflag & IO_SYNC) == 0)
2208 panic("ext2_write: nonsync dir write");
2211 panic("ext2_write: type %p %d (%jd,%jd)", (void *)vp,
2212 vp->v_type, (intmax_t)uio->uio_offset,
2213 (intmax_t)uio->uio_resid);
2216 KASSERT(uio->uio_resid >= 0, ("ext2_write: uio->uio_resid < 0"));
2217 KASSERT(uio->uio_offset >= 0, ("ext2_write: uio->uio_offset < 0"));
2219 if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->e2fs_maxfilesize)
2222 * Maybe this should be above the vnode op call, but so long as
2223 * file servers have no limits, I don't think it matters.
2225 if (vn_rlimit_fsize(vp, uio, uio->uio_td))
2228 resid = uio->uio_resid;
2230 if (seqcount > BA_SEQMAX)
2231 flags = BA_SEQMAX << BA_SEQSHIFT;
2233 flags = seqcount << BA_SEQSHIFT;
2234 if ((ioflag & IO_SYNC) && !DOINGASYNC(vp))
2237 for (error = 0; uio->uio_resid > 0;) {
2238 lbn = lblkno(fs, uio->uio_offset);
2239 blkoffset = blkoff(fs, uio->uio_offset);
2240 xfersize = fs->e2fs_fsize - blkoffset;
2241 if (uio->uio_resid < xfersize)
2242 xfersize = uio->uio_resid;
2243 if (uio->uio_offset + xfersize > ip->i_size)
2244 vnode_pager_setsize(vp, uio->uio_offset + xfersize);
2247 * We must perform a read-before-write if the transfer size
2248 * does not cover the entire buffer.
2250 if (fs->e2fs_bsize > xfersize)
2253 flags &= ~BA_CLRBUF;
2254 error = ext2_balloc(ip, lbn, blkoffset + xfersize,
2255 ap->a_cred, &bp, flags);
2259 if ((ioflag & (IO_SYNC | IO_INVAL)) == (IO_SYNC | IO_INVAL))
2260 bp->b_flags |= B_NOCACHE;
2261 if (uio->uio_offset + xfersize > ip->i_size)
2262 ip->i_size = uio->uio_offset + xfersize;
2263 size = blksize(fs, ip, lbn) - bp->b_resid;
2264 if (size < xfersize)
2268 uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio);
2270 * If the buffer is not already filled and we encounter an
2271 * error while trying to fill it, we have to clear out any
2272 * garbage data from the pages instantiated for the buffer.
2273 * If we do not, a failed uiomove() during a write can leave
2274 * the prior contents of the pages exposed to a userland mmap.
2276 * Note that we need only clear buffers with a transfer size
2277 * equal to the block size because buffers with a shorter
2278 * transfer size were cleared above by the call to ext2_balloc()
2279 * with the BA_CLRBUF flag set.
2281 * If the source region for uiomove identically mmaps the
2282 * buffer, uiomove() performed the NOP copy, and the buffer
2283 * content remains valid because the page fault handler
2284 * validated the pages.
2286 if (error != 0 && (bp->b_flags & B_CACHE) == 0 &&
2287 fs->e2fs_bsize == xfersize)
2290 vfs_bio_set_flags(bp, ioflag);
2293 * If IO_SYNC each buffer is written synchronously. Otherwise
2294 * if we have a severe page deficiency write the buffer
2295 * asynchronously. Otherwise try to cluster, and if that
2296 * doesn't do it then either do an async write (if O_DIRECT),
2297 * or a delayed write (if not).
2299 if (ioflag & IO_SYNC) {
2301 } else if (vm_page_count_severe() ||
2302 buf_dirty_count_severe() ||
2303 (ioflag & IO_ASYNC)) {
2304 bp->b_flags |= B_CLUSTEROK;
2306 } else if (xfersize + blkoffset == fs->e2fs_fsize) {
2307 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
2308 bp->b_flags |= B_CLUSTEROK;
2309 cluster_write(vp, bp, ip->i_size, seqcount, 0);
2313 } else if (ioflag & IO_DIRECT) {
2314 bp->b_flags |= B_CLUSTEROK;
2317 bp->b_flags |= B_CLUSTEROK;
2320 if (error || xfersize == 0)
2324 * If we successfully wrote any data, and we are not the superuser
2325 * we clear the setuid and setgid bits as a precaution against
2328 if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid &&
2330 if (priv_check_cred(ap->a_cred, PRIV_VFS_RETAINSUGID))
2331 ip->i_mode &= ~(ISUID | ISGID);
2334 if (ioflag & IO_UNIT) {
2335 (void)ext2_truncate(vp, osize,
2336 ioflag & IO_SYNC, ap->a_cred, uio->uio_td);
2337 uio->uio_offset -= resid - uio->uio_resid;
2338 uio->uio_resid = resid;
2341 if (uio->uio_resid != resid) {
2342 ip->i_flag |= IN_CHANGE | IN_UPDATE;
2343 if (ioflag & IO_SYNC)
2344 error = ext2_update(vp, 1);