diff options
Diffstat (limited to 'sys/gnu/fs/ext2fs/ext2_vnops.c')
| -rw-r--r-- | sys/gnu/fs/ext2fs/ext2_vnops.c | 1649 |
1 files changed, 0 insertions, 1649 deletions
diff --git a/sys/gnu/fs/ext2fs/ext2_vnops.c b/sys/gnu/fs/ext2fs/ext2_vnops.c deleted file mode 100644 index 6b44b9b..0000000 --- a/sys/gnu/fs/ext2fs/ext2_vnops.c +++ /dev/null @@ -1,1649 +0,0 @@ -/*- - * modified for EXT2FS support in Lites 1.1 - * - * Aug 1995, Godmar Back (gback@cs.utah.edu) - * University of Utah, Department of Computer Science - */ -/*- - * Copyright (c) 1982, 1986, 1989, 1993 - * The Regents of the University of California. All rights reserved. - * (c) UNIX System Laboratories, Inc. - * All or some portions of this file are derived from material licensed - * to the University of California by American Telephone and Telegraph - * Co. or Unix System Laboratories, Inc. and are reproduced herein with - * the permission of UNIX System Laboratories, Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)ufs_vnops.c 8.7 (Berkeley) 2/3/94 - * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95 - * $FreeBSD$ - */ - -#include "opt_suiddir.h" - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/resourcevar.h> -#include <sys/kernel.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#include <sys/bio.h> -#include <sys/buf.h> -#include <sys/endian.h> -#include <sys/priv.h> -#include <sys/proc.h> -#include <sys/mount.h> -#include <sys/unistd.h> -#include <sys/time.h> -#include <sys/vnode.h> -#include <sys/namei.h> -#include <sys/lockf.h> -#include <sys/event.h> -#include <sys/conf.h> -#include <sys/file.h> - -#include <vm/vm.h> -#include <vm/vm_extern.h> -#include <vm/vnode_pager.h> - -#include <fs/fifofs/fifo.h> - -#include <sys/signalvar.h> -#include <ufs/ufs/dir.h> - -#include <gnu/fs/ext2fs/inode.h> -#include <gnu/fs/ext2fs/ext2_mount.h> -#include <gnu/fs/ext2fs/ext2_fs_sb.h> -#include <gnu/fs/ext2fs/fs.h> -#include <gnu/fs/ext2fs/ext2_extern.h> -#include <gnu/fs/ext2fs/ext2_fs.h> - -static int ext2_makeinode(int mode, struct vnode *, struct vnode **, struct componentname *); - -static vop_access_t ext2_access; -static int ext2_chmod(struct vnode *, int, struct ucred *, struct thread *); -static int ext2_chown(struct vnode *, uid_t, gid_t, struct ucred *, - struct thread *); -static vop_close_t ext2_close; -static vop_create_t ext2_create; -static vop_fsync_t ext2_fsync; -static vop_getattr_t ext2_getattr; -static vop_link_t ext2_link; -static vop_mkdir_t ext2_mkdir; -static vop_mknod_t ext2_mknod; -static vop_open_t ext2_open; -static vop_pathconf_t ext2_pathconf; -static vop_print_t ext2_print; -static vop_read_t ext2_read; -static vop_readlink_t ext2_readlink; -static vop_remove_t ext2_remove; -static vop_rename_t ext2_rename; -static vop_rmdir_t ext2_rmdir; -static vop_setattr_t ext2_setattr; -static vop_strategy_t ext2_strategy; -static vop_symlink_t ext2_symlink; -static vop_write_t ext2_write; -static vop_vptofh_t ext2_vptofh; -static vop_close_t ext2fifo_close; -static vop_kqfilter_t ext2fifo_kqfilter; - -/* Global vfs data structures for ext2. */ -struct vop_vector ext2_vnodeops = { - .vop_default = &default_vnodeops, - .vop_access = ext2_access, - .vop_bmap = ext2_bmap, - .vop_cachedlookup = ext2_lookup, - .vop_close = ext2_close, - .vop_create = ext2_create, - .vop_fsync = ext2_fsync, - .vop_getattr = ext2_getattr, - .vop_inactive = ext2_inactive, - .vop_link = ext2_link, - .vop_lookup = vfs_cache_lookup, - .vop_mkdir = ext2_mkdir, - .vop_mknod = ext2_mknod, - .vop_open = ext2_open, - .vop_pathconf = ext2_pathconf, - .vop_poll = vop_stdpoll, - .vop_print = ext2_print, - .vop_read = ext2_read, - .vop_readdir = ext2_readdir, - .vop_readlink = ext2_readlink, - .vop_reallocblks = ext2_reallocblks, - .vop_reclaim = ext2_reclaim, - .vop_remove = ext2_remove, - .vop_rename = ext2_rename, - .vop_rmdir = ext2_rmdir, - .vop_setattr = ext2_setattr, - .vop_strategy = ext2_strategy, - .vop_symlink = ext2_symlink, - .vop_write = ext2_write, - .vop_vptofh = ext2_vptofh, -}; - -struct vop_vector ext2_fifoops = { - .vop_default = &fifo_specops, - .vop_access = ext2_access, - .vop_close = ext2fifo_close, - .vop_fsync = ext2_fsync, - .vop_getattr = ext2_getattr, - .vop_inactive = ext2_inactive, - .vop_kqfilter = ext2fifo_kqfilter, - .vop_print = ext2_print, - .vop_read = VOP_PANIC, - .vop_reclaim = ext2_reclaim, - .vop_setattr = ext2_setattr, - .vop_write = VOP_PANIC, - .vop_vptofh = ext2_vptofh, -}; - -#include <gnu/fs/ext2fs/ext2_readwrite.c> - -/* - * A virgin directory (no blushing please). - * Note that the type and namlen fields are reversed relative to ext2. - * Also, we don't use `struct odirtemplate', since it would just cause - * endianness problems. - */ -static struct dirtemplate mastertemplate = { - 0, 12, 1, EXT2_FT_DIR, ".", - 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".." -}; -static struct dirtemplate omastertemplate = { - 0, 12, 1, EXT2_FT_UNKNOWN, ".", - 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".." -}; - -void -ext2_itimes(vp) - struct vnode *vp; -{ - struct inode *ip; - struct timespec ts; - - ip = VTOI(vp); - if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0) - return; - if ((vp->v_type == VBLK || vp->v_type == VCHR)) - ip->i_flag |= IN_LAZYMOD; - else - ip->i_flag |= IN_MODIFIED; - if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { - vfs_timestamp(&ts); - if (ip->i_flag & IN_ACCESS) { - ip->i_atime = ts.tv_sec; - ip->i_atimensec = ts.tv_nsec; - } - if (ip->i_flag & IN_UPDATE) { - ip->i_mtime = ts.tv_sec; - ip->i_mtimensec = ts.tv_nsec; - ip->i_modrev++; - } - if (ip->i_flag & IN_CHANGE) { - ip->i_ctime = ts.tv_sec; - ip->i_ctimensec = ts.tv_nsec; - } - } - ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); -} - -/* - * Create a regular file - */ -static int -ext2_create(ap) - struct vop_create_args /* { - struct vnode *a_dvp; - struct vnode **a_vpp; - struct componentname *a_cnp; - struct vattr *a_vap; - } */ *ap; -{ - int error; - - error = - ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), - ap->a_dvp, ap->a_vpp, ap->a_cnp); - if (error) - return (error); - return (0); -} - -static int -ext2_open(ap) - struct vop_open_args /* { - struct vnode *a_vp; - int a_mode; - struct ucred *a_cred; - struct thread *a_td; - } */ *ap; -{ - - if (ap->a_vp->v_type == VBLK || ap->a_vp->v_type == VCHR) - return (EOPNOTSUPP); - - /* - * Files marked append-only must be opened for appending. - */ - if ((VTOI(ap->a_vp)->i_flags & APPEND) && - (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) - return (EPERM); - - vnode_create_vobject(ap->a_vp, VTOI(ap->a_vp)->i_size, ap->a_td); - - return (0); -} - -/* - * Close called. - * - * Update the times on the inode. - */ -static int -ext2_close(ap) - struct vop_close_args /* { - struct vnode *a_vp; - int a_fflag; - struct ucred *a_cred; - struct thread *a_td; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - - VI_LOCK(vp); - if (vp->v_usecount > 1) - ext2_itimes(vp); - VI_UNLOCK(vp); - return (0); -} - -static int -ext2_access(ap) - struct vop_access_args /* { - struct vnode *a_vp; - accmode_t a_accmode; - struct ucred *a_cred; - struct thread *a_td; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - struct inode *ip = VTOI(vp); - accmode_t accmode = ap->a_accmode; - int error; - - if (vp->v_type == VBLK || vp->v_type == VCHR) - return (EOPNOTSUPP); - - /* - * Disallow write attempts on read-only file systems; - * unless the file is a socket, fifo, or a block or - * character device resident on the file system. - */ - if (accmode & VWRITE) { - switch (vp->v_type) { - case VDIR: - case VLNK: - case VREG: - if (vp->v_mount->mnt_flag & MNT_RDONLY) - return (EROFS); - break; - default: - break; - } - } - - /* If immutable bit set, nobody gets to write it. */ - if ((accmode & VWRITE) && (ip->i_flags & (IMMUTABLE | SF_SNAPSHOT))) - return (EPERM); - - error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid, - ap->a_accmode, ap->a_cred, NULL); - return (error); -} - -static int -ext2_getattr(ap) - struct vop_getattr_args /* { - struct vnode *a_vp; - struct vattr *a_vap; - struct ucred *a_cred; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - struct inode *ip = VTOI(vp); - struct vattr *vap = ap->a_vap; - - ext2_itimes(vp); - /* - * Copy from inode table - */ - vap->va_fsid = dev2udev(ip->i_devvp->v_rdev); - vap->va_fileid = ip->i_number; - vap->va_mode = ip->i_mode & ~IFMT; - vap->va_nlink = ip->i_nlink; - vap->va_uid = ip->i_uid; - vap->va_gid = ip->i_gid; - vap->va_rdev = ip->i_rdev; - vap->va_size = ip->i_size; - vap->va_atime.tv_sec = ip->i_atime; - vap->va_atime.tv_nsec = ip->i_atimensec; - vap->va_mtime.tv_sec = ip->i_mtime; - vap->va_mtime.tv_nsec = ip->i_mtimensec; - vap->va_ctime.tv_sec = ip->i_ctime; - vap->va_ctime.tv_nsec = ip->i_ctimensec; - vap->va_flags = ip->i_flags; - vap->va_gen = ip->i_gen; - vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; - vap->va_bytes = dbtob((u_quad_t)ip->i_blocks); - vap->va_type = IFTOVT(ip->i_mode); - vap->va_filerev = ip->i_modrev; - return (0); -} - -/* - * Set attribute vnode op. called from several syscalls - */ -static int -ext2_setattr(ap) - struct vop_setattr_args /* { - struct vnode *a_vp; - struct vattr *a_vap; - struct ucred *a_cred; - } */ *ap; -{ - struct vattr *vap = ap->a_vap; - struct vnode *vp = ap->a_vp; - struct inode *ip = VTOI(vp); - struct ucred *cred = ap->a_cred; - struct thread *td = curthread; - int error; - - /* - * Check for unsettable attributes. - */ - if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || - (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || - (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || - ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { - return (EINVAL); - } - if (vap->va_flags != VNOVAL) { - /* Disallow flags not supported by ext2fs. */ - if (vap->va_flags & ~(SF_APPEND | SF_IMMUTABLE | UF_NODUMP)) - return (EOPNOTSUPP); - - if (vp->v_mount->mnt_flag & MNT_RDONLY) - return (EROFS); - /* - * Callers may only modify the file flags on objects they - * have VADMIN rights for. - */ - if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) - return (error); - /* - * Unprivileged processes and privileged processes in - * jail() are not permitted to unset system flags, or - * modify flags if any system flags are set. - * Privileged non-jail processes may not modify system flags - * if securelevel > 0 and any existing system flags are set. - */ - if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0)) { - if (ip->i_flags - & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) { - error = securelevel_gt(cred, 0); - if (error) - return (error); - } - ip->i_flags = vap->va_flags; - } else { - if (ip->i_flags - & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) || - (vap->va_flags & UF_SETTABLE) != vap->va_flags) - return (EPERM); - ip->i_flags &= SF_SETTABLE; - ip->i_flags |= (vap->va_flags & UF_SETTABLE); - } - ip->i_flag |= IN_CHANGE; - if (vap->va_flags & (IMMUTABLE | APPEND)) - return (0); - } - if (ip->i_flags & (IMMUTABLE | APPEND)) - return (EPERM); - /* - * Go through the fields and update iff not VNOVAL. - */ - if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { - if (vp->v_mount->mnt_flag & MNT_RDONLY) - return (EROFS); - if ((error = ext2_chown(vp, vap->va_uid, vap->va_gid, cred, - td)) != 0) - return (error); - } - if (vap->va_size != VNOVAL) { - /* - * Disallow write attempts on read-only file systems; - * unless the file is a socket, fifo, or a block or - * character device resident on the file system. - */ - switch (vp->v_type) { - case VDIR: - return (EISDIR); - case VLNK: - case VREG: - if (vp->v_mount->mnt_flag & MNT_RDONLY) - return (EROFS); - break; - default: - break; - } - if ((error = ext2_truncate(vp, vap->va_size, 0, cred, td)) != 0) - return (error); - } - if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { - if (vp->v_mount->mnt_flag & MNT_RDONLY) - return (EROFS); - /* - * From utimes(2): - * If times is NULL, ... The caller must be the owner of - * the file, have permission to write the file, or be the - * super-user. - * If times is non-NULL, ... The caller must be the owner of - * the file or be the super-user. - */ - if ((error = VOP_ACCESS(vp, VADMIN, cred, td)) && - ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || - (error = VOP_ACCESS(vp, VWRITE, cred, td)))) - return (error); - if (vap->va_atime.tv_sec != VNOVAL) - ip->i_flag |= IN_ACCESS; - if (vap->va_mtime.tv_sec != VNOVAL) - ip->i_flag |= IN_CHANGE | IN_UPDATE; - ext2_itimes(vp); - if (vap->va_atime.tv_sec != VNOVAL) { - ip->i_atime = vap->va_atime.tv_sec; - ip->i_atimensec = vap->va_atime.tv_nsec; - } - if (vap->va_mtime.tv_sec != VNOVAL) { - ip->i_mtime = vap->va_mtime.tv_sec; - ip->i_mtimensec = vap->va_mtime.tv_nsec; - } - error = ext2_update(vp, 0); - if (error) - return (error); - } - error = 0; - if (vap->va_mode != (mode_t)VNOVAL) { - if (vp->v_mount->mnt_flag & MNT_RDONLY) - return (EROFS); - error = ext2_chmod(vp, (int)vap->va_mode, cred, td); - } - return (error); -} - -/* - * Change the mode on a file. - * Inode must be locked before calling. - */ -static int -ext2_chmod(vp, mode, cred, td) - struct vnode *vp; - int mode; - struct ucred *cred; - struct thread *td; -{ - struct inode *ip = VTOI(vp); - int error; - - /* - * To modify the permissions on a file, must possess VADMIN - * for that file. - */ - if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) - return (error); - /* - * Privileged processes may set the sticky bit on non-directories, - * as well as set the setgid bit on a file with a group that the - * process is not a member of. - */ - if (vp->v_type != VDIR && (mode & S_ISTXT)) { - error = priv_check_cred(cred, PRIV_VFS_STICKYFILE, 0); - if (error) - return (EFTYPE); - } - if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) { - error = priv_check_cred(cred, PRIV_VFS_SETGID, 0); - if (error) - return (error); - } - ip->i_mode &= ~ALLPERMS; - ip->i_mode |= (mode & ALLPERMS); - ip->i_flag |= IN_CHANGE; - return (0); -} - -/* - * Perform chown operation on inode ip; - * inode must be locked prior to call. - */ -static int -ext2_chown(vp, uid, gid, cred, td) - struct vnode *vp; - uid_t uid; - gid_t gid; - struct ucred *cred; - struct thread *td; -{ - struct inode *ip = VTOI(vp); - uid_t ouid; - gid_t ogid; - int error = 0; - - if (uid == (uid_t)VNOVAL) - uid = ip->i_uid; - if (gid == (gid_t)VNOVAL) - gid = ip->i_gid; - /* - * To modify the ownership of a file, must possess VADMIN - * for that file. - */ - if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) - return (error); - /* - * To change the owner of a file, or change the group of a file - * to a group of which we are not a member, the caller must - * have privilege. - */ - if (uid != ip->i_uid || (gid != ip->i_gid && - !groupmember(gid, cred))) { - error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0); - if (error) - return (error); - } - ogid = ip->i_gid; - ouid = ip->i_uid; - ip->i_gid = gid; - ip->i_uid = uid; - ip->i_flag |= IN_CHANGE; - if ((ip->i_mode & (ISUID | ISGID)) && (ouid != uid || ogid != gid)) { - if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID, 0) != 0) - ip->i_mode &= ~(ISUID | ISGID); - } - return (0); -} - -/* - * Synch an open file. - */ -/* ARGSUSED */ -static int -ext2_fsync(ap) - struct vop_fsync_args /* { - struct vnode *a_vp; - struct ucred *a_cred; - int a_waitfor; - struct thread *a_td; - } */ *ap; -{ - /* - * Flush all dirty buffers associated with a vnode. - */ - ext2_discard_prealloc(VTOI(ap->a_vp)); - - vop_stdfsync(ap); - - return (ext2_update(ap->a_vp, ap->a_waitfor == MNT_WAIT)); -} - -/* - * Mknod vnode call - */ -/* ARGSUSED */ -static int -ext2_mknod(ap) - struct vop_mknod_args /* { - struct vnode *a_dvp; - struct vnode **a_vpp; - struct componentname *a_cnp; - struct vattr *a_vap; - } */ *ap; -{ - struct vattr *vap = ap->a_vap; - struct vnode **vpp = ap->a_vpp; - struct inode *ip; - ino_t ino; - int error; - - error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), - ap->a_dvp, vpp, ap->a_cnp); - if (error) - return (error); - ip = VTOI(*vpp); - ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; - if (vap->va_rdev != VNOVAL) { - /* - * Want to be able to use this to make badblock - * inodes, so don't truncate the dev number. - */ - ip->i_rdev = vap->va_rdev; - } - /* - * Remove inode, then reload it through VFS_VGET so it is - * checked to see if it is an alias of an existing entry in - * the inode cache. XXX I don't believe this is necessary now. - */ - (*vpp)->v_type = VNON; - ino = ip->i_number; /* Save this before vgone() invalidates ip. */ - vgone(*vpp); - vput(*vpp); - error = VFS_VGET(ap->a_dvp->v_mount, ino, LK_EXCLUSIVE, vpp); - if (error) { - *vpp = NULL; - return (error); - } - return (0); -} - -static int -ext2_remove(ap) - struct vop_remove_args /* { - struct vnode *a_dvp; - struct vnode *a_vp; - struct componentname *a_cnp; - } */ *ap; -{ - struct inode *ip; - struct vnode *vp = ap->a_vp; - struct vnode *dvp = ap->a_dvp; - int error; - - ip = VTOI(vp); - if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || - (VTOI(dvp)->i_flags & APPEND)) { - error = EPERM; - goto out; - } - error = ext2_dirremove(dvp, ap->a_cnp); - if (error == 0) { - ip->i_nlink--; - ip->i_flag |= IN_CHANGE; - } -out: - return (error); -} - -/* - * link vnode call - */ -static int -ext2_link(ap) - struct vop_link_args /* { - struct vnode *a_tdvp; - struct vnode *a_vp; - struct componentname *a_cnp; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - struct vnode *tdvp = ap->a_tdvp; - struct componentname *cnp = ap->a_cnp; - struct inode *ip; - int error; - -#ifdef DIAGNOSTIC - if ((cnp->cn_flags & HASBUF) == 0) - panic("ext2_link: no name"); -#endif - if (tdvp->v_mount != vp->v_mount) { - error = EXDEV; - goto out; - } - ip = VTOI(vp); - if ((nlink_t)ip->i_nlink >= LINK_MAX) { - error = EMLINK; - goto out; - } - if (ip->i_flags & (IMMUTABLE | APPEND)) { - error = EPERM; - goto out; - } - ip->i_nlink++; - ip->i_flag |= IN_CHANGE; - error = ext2_update(vp, 1); - if (!error) - error = ext2_direnter(ip, tdvp, cnp); - if (error) { - ip->i_nlink--; - ip->i_flag |= IN_CHANGE; - } -out: - return (error); -} - -/* - * Rename system call. - * See comments in sys/ufs/ufs/ufs_vnops.c - */ -static int -ext2_rename(ap) - struct vop_rename_args /* { - struct vnode *a_fdvp; - struct vnode *a_fvp; - struct componentname *a_fcnp; - struct vnode *a_tdvp; - struct vnode *a_tvp; - struct componentname *a_tcnp; - } */ *ap; -{ - struct vnode *tvp = ap->a_tvp; - struct vnode *tdvp = ap->a_tdvp; - struct vnode *fvp = ap->a_fvp; - struct vnode *fdvp = ap->a_fdvp; - struct componentname *tcnp = ap->a_tcnp; - struct componentname *fcnp = ap->a_fcnp; - struct inode *ip, *xp, *dp; - struct dirtemplate dirbuf; - int doingdirectory = 0, oldparent = 0, newparent = 0; - int error = 0; - u_char namlen; - -#ifdef DIAGNOSTIC - if ((tcnp->cn_flags & HASBUF) == 0 || - (fcnp->cn_flags & HASBUF) == 0) - panic("ext2_rename: no name"); -#endif - /* - * Check for cross-device rename. - */ - if ((fvp->v_mount != tdvp->v_mount) || - (tvp && (fvp->v_mount != tvp->v_mount))) { - error = EXDEV; -abortit: - if (tdvp == tvp) - vrele(tdvp); - else - vput(tdvp); - if (tvp) - vput(tvp); - vrele(fdvp); - vrele(fvp); - return (error); - } - - if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || - (VTOI(tdvp)->i_flags & APPEND))) { - error = EPERM; - goto abortit; - } - - /* - * Renaming a file to itself has no effect. The upper layers should - * not call us in that case. Temporarily just warn if they do. - */ - if (fvp == tvp) { - printf("ext2_rename: fvp == tvp (can't happen)\n"); - error = 0; - goto abortit; - } - - if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) - goto abortit; - dp = VTOI(fdvp); - ip = VTOI(fvp); - if (ip->i_nlink >= LINK_MAX) { - VOP_UNLOCK(fvp, 0); - error = EMLINK; - goto abortit; - } - if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) - || (dp->i_flags & APPEND)) { - VOP_UNLOCK(fvp, 0); - error = EPERM; - goto abortit; - } - if ((ip->i_mode & IFMT) == IFDIR) { - /* - * Avoid ".", "..", and aliases of "." for obvious reasons. - */ - if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || - dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT || - (ip->i_flag & IN_RENAME)) { - VOP_UNLOCK(fvp, 0); - error = EINVAL; - goto abortit; - } - ip->i_flag |= IN_RENAME; - oldparent = dp->i_number; - doingdirectory++; - } - vrele(fdvp); - - /* - * When the target exists, both the directory - * and target vnodes are returned locked. - */ - dp = VTOI(tdvp); - xp = NULL; - if (tvp) - xp = VTOI(tvp); - - /* - * 1) Bump link count while we're moving stuff - * around. If we crash somewhere before - * completing our work, the link count - * may be wrong, but correctable. - */ - ip->i_nlink++; - ip->i_flag |= IN_CHANGE; - if ((error = ext2_update(fvp, 1)) != 0) { - VOP_UNLOCK(fvp, 0); - goto bad; - } - - /* - * If ".." must be changed (ie the directory gets a new - * parent) then the source directory must not be in the - * directory heirarchy above the target, as this would - * orphan everything below the source directory. Also - * the user must have write permission in the source so - * as to be able to change "..". We must repeat the call - * to namei, as the parent directory is unlocked by the - * call to checkpath(). - */ - error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); - VOP_UNLOCK(fvp, 0); - if (oldparent != dp->i_number) - newparent = dp->i_number; - if (doingdirectory && newparent) { - if (error) /* write access check above */ - goto bad; - if (xp != NULL) - vput(tvp); - error = ext2_checkpath(ip, dp, tcnp->cn_cred); - if (error) - goto out; - VREF(tdvp); - error = relookup(tdvp, &tvp, tcnp); - if (error) - goto out; - vrele(tdvp); - dp = VTOI(tdvp); - xp = NULL; - if (tvp) - xp = VTOI(tvp); - } - /* - * 2) If target doesn't exist, link the target - * to the source and unlink the source. - * Otherwise, rewrite the target directory - * entry to reference the source inode and - * expunge the original entry's existence. - */ - if (xp == NULL) { - if (dp->i_devvp != ip->i_devvp) - panic("ext2_rename: EXDEV"); - /* - * Account for ".." in new directory. - * When source and destination have the same - * parent we don't fool with the link count. - */ - if (doingdirectory && newparent) { - if ((nlink_t)dp->i_nlink >= LINK_MAX) { - error = EMLINK; - goto bad; - } - dp->i_nlink++; - dp->i_flag |= IN_CHANGE; - error = ext2_update(tdvp, 1); - if (error) - goto bad; - } - error = ext2_direnter(ip, tdvp, tcnp); - if (error) { - if (doingdirectory && newparent) { - dp->i_nlink--; - dp->i_flag |= IN_CHANGE; - (void)ext2_update(tdvp, 1); - } - goto bad; - } - vput(tdvp); - } else { - if (xp->i_devvp != dp->i_devvp || xp->i_devvp != ip->i_devvp) - panic("ext2_rename: EXDEV"); - /* - * Short circuit rename(foo, foo). - */ - if (xp->i_number == ip->i_number) - panic("ext2_rename: same file"); - /* - * If the parent directory is "sticky", then the user must - * own the parent directory, or the destination of the rename, - * otherwise the destination may not be changed (except by - * root). This implements append-only directories. - */ - if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && - tcnp->cn_cred->cr_uid != dp->i_uid && - xp->i_uid != tcnp->cn_cred->cr_uid) { - error = EPERM; - goto bad; - } - /* - * Target must be empty if a directory and have no links - * to it. Also, ensure source and target are compatible - * (both directories, or both not directories). - */ - if ((xp->i_mode&IFMT) == IFDIR) { - if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) || - xp->i_nlink > 2) { - error = ENOTEMPTY; - goto bad; - } - if (!doingdirectory) { - error = ENOTDIR; - goto bad; - } - cache_purge(tdvp); - } else if (doingdirectory) { - error = EISDIR; - goto bad; - } - error = ext2_dirrewrite(dp, ip, tcnp); - if (error) - goto bad; - /* - * If the target directory is in the same - * directory as the source directory, - * decrement the link count on the parent - * of the target directory. - */ - if (doingdirectory && !newparent) { - dp->i_nlink--; - dp->i_flag |= IN_CHANGE; - } - vput(tdvp); - /* - * Adjust the link count of the target to - * reflect the dirrewrite above. If this is - * a directory it is empty and there are - * no links to it, so we can squash the inode and - * any space associated with it. We disallowed - * renaming over top of a directory with links to - * it above, as the remaining link would point to - * a directory without "." or ".." entries. - */ - xp->i_nlink--; - if (doingdirectory) { - if (--xp->i_nlink != 0) - panic("ext2_rename: linked directory"); - error = ext2_truncate(tvp, (off_t)0, IO_SYNC, - tcnp->cn_cred, tcnp->cn_thread); - } - xp->i_flag |= IN_CHANGE; - vput(tvp); - xp = NULL; - } - - /* - * 3) Unlink the source. - */ - fcnp->cn_flags &= ~MODMASK; - fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; - VREF(fdvp); - error = relookup(fdvp, &fvp, fcnp); - if (error == 0) - vrele(fdvp); - if (fvp != NULL) { - xp = VTOI(fvp); - dp = VTOI(fdvp); - } else { - /* - * From name has disappeared. - */ - if (doingdirectory) - panic("ext2_rename: lost dir entry"); - vrele(ap->a_fvp); - return (0); - } - /* - * Ensure that the directory entry still exists and has not - * changed while the new name has been entered. If the source is - * a file then the entry may have been unlinked or renamed. In - * either case there is no further work to be done. If the source - * is a directory then it cannot have been rmdir'ed; its link - * count of three would cause a rmdir to fail with ENOTEMPTY. - * The IN_RENAME flag ensures that it cannot be moved by another - * rename. - */ - if (xp != ip) { - if (doingdirectory) - panic("ext2_rename: lost dir entry"); - } else { - /* - * If the source is a directory with a - * new parent, the link count of the old - * parent directory must be decremented - * and ".." set to point to the new parent. - */ - if (doingdirectory && newparent) { - dp->i_nlink--; - dp->i_flag |= IN_CHANGE; - error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, - sizeof (struct dirtemplate), (off_t)0, - UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, - tcnp->cn_cred, NOCRED, NULL, NULL); - if (error == 0) { - /* Like ufs little-endian: */ - namlen = dirbuf.dotdot_type; - if (namlen != 2 || - dirbuf.dotdot_name[0] != '.' || - dirbuf.dotdot_name[1] != '.') { - ext2_dirbad(xp, (doff_t)12, - "rename: mangled dir"); - } else { - dirbuf.dotdot_ino = newparent; - (void) vn_rdwr(UIO_WRITE, fvp, - (caddr_t)&dirbuf, - sizeof (struct dirtemplate), - (off_t)0, UIO_SYSSPACE, - IO_NODELOCKED | IO_SYNC | - IO_NOMACCHECK, tcnp->cn_cred, - NOCRED, NULL, NULL); - cache_purge(fdvp); - } - } - } - error = ext2_dirremove(fdvp, fcnp); - if (!error) { - xp->i_nlink--; - xp->i_flag |= IN_CHANGE; - } - xp->i_flag &= ~IN_RENAME; - } - if (dp) - vput(fdvp); - if (xp) - vput(fvp); - vrele(ap->a_fvp); - return (error); - -bad: - if (xp) - vput(ITOV(xp)); - vput(ITOV(dp)); -out: - if (doingdirectory) - ip->i_flag &= ~IN_RENAME; - if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { - ip->i_nlink--; - ip->i_flag |= IN_CHANGE; - ip->i_flag &= ~IN_RENAME; - vput(fvp); - } else - vrele(fvp); - return (error); -} - -/* - * Mkdir system call - */ -static int -ext2_mkdir(ap) - struct vop_mkdir_args /* { - struct vnode *a_dvp; - struct vnode **a_vpp; - struct componentname *a_cnp; - struct vattr *a_vap; - } */ *ap; -{ - struct vnode *dvp = ap->a_dvp; - struct vattr *vap = ap->a_vap; - struct componentname *cnp = ap->a_cnp; - struct inode *ip, *dp; - struct vnode *tvp; - struct dirtemplate dirtemplate, *dtp; - int error, dmode; - -#ifdef DIAGNOSTIC - if ((cnp->cn_flags & HASBUF) == 0) - panic("ext2_mkdir: no name"); -#endif - dp = VTOI(dvp); - if ((nlink_t)dp->i_nlink >= LINK_MAX) { - error = EMLINK; - goto out; - } - dmode = vap->va_mode & 0777; - dmode |= IFDIR; - /* - * Must simulate part of ext2_makeinode here to acquire the inode, - * but not have it entered in the parent directory. The entry is - * made later after writing "." and ".." entries. - */ - error = ext2_valloc(dvp, dmode, cnp->cn_cred, &tvp); - if (error) - goto out; - ip = VTOI(tvp); - ip->i_gid = dp->i_gid; -#ifdef SUIDDIR - { - /* - * if we are hacking owners here, (only do this where told to) - * and we are not giving it TOO root, (would subvert quotas) - * then go ahead and give it to the other user. - * The new directory also inherits the SUID bit. - * If user's UID and dir UID are the same, - * 'give it away' so that the SUID is still forced on. - */ - if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) && - (dp->i_mode & ISUID) && dp->i_uid) { - dmode |= ISUID; - ip->i_uid = dp->i_uid; - } else { - ip->i_uid = cnp->cn_cred->cr_uid; - } - } -#else - ip->i_uid = cnp->cn_cred->cr_uid; -#endif - ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; - ip->i_mode = dmode; - tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ - ip->i_nlink = 2; - if (cnp->cn_flags & ISWHITEOUT) - ip->i_flags |= UF_OPAQUE; - error = ext2_update(tvp, 1); - - /* - * Bump link count in parent directory - * to reflect work done below. Should - * be done before reference is created - * so reparation is possible if we crash. - */ - dp->i_nlink++; - dp->i_flag |= IN_CHANGE; - error = ext2_update(dvp, 1); - if (error) - goto bad; - - /* Initialize directory with "." and ".." from static template. */ - if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs, - EXT2_FEATURE_INCOMPAT_FILETYPE)) - dtp = &mastertemplate; - else - dtp = &omastertemplate; - dirtemplate = *dtp; - dirtemplate.dot_ino = ip->i_number; - dirtemplate.dotdot_ino = dp->i_number; - /* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE - * so let's just redefine it - for this function only - */ -#undef DIRBLKSIZ -#define DIRBLKSIZ VTOI(dvp)->i_e2fs->s_blocksize - dirtemplate.dotdot_reclen = DIRBLKSIZ - 12; - error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, - sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, - IO_NODELOCKED | IO_SYNC | IO_NOMACCHECK, cnp->cn_cred, NOCRED, - NULL, NULL); - if (error) { - dp->i_nlink--; - dp->i_flag |= IN_CHANGE; - goto bad; - } - if (DIRBLKSIZ > VFSTOEXT2(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) - /* XXX should grow with balloc() */ - panic("ext2_mkdir: blksize"); - else { - ip->i_size = DIRBLKSIZ; - ip->i_flag |= IN_CHANGE; - } - - /* Directory set up, now install its entry in the parent directory. */ - error = ext2_direnter(ip, dvp, cnp); - if (error) { - dp->i_nlink--; - dp->i_flag |= IN_CHANGE; - } -bad: - /* - * No need to do an explicit VOP_TRUNCATE here, vrele will do this - * for us because we set the link count to 0. - */ - if (error) { - ip->i_nlink = 0; - ip->i_flag |= IN_CHANGE; - vput(tvp); - } else - *ap->a_vpp = tvp; -out: - return (error); -#undef DIRBLKSIZ -#define DIRBLKSIZ DEV_BSIZE -} - -/* - * Rmdir system call. - */ -static int -ext2_rmdir(ap) - struct vop_rmdir_args /* { - struct vnode *a_dvp; - struct vnode *a_vp; - struct componentname *a_cnp; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - struct vnode *dvp = ap->a_dvp; - struct componentname *cnp = ap->a_cnp; - struct inode *ip, *dp; - int error; - - ip = VTOI(vp); - dp = VTOI(dvp); - - /* - * Verify the directory is empty (and valid). - * (Rmdir ".." won't be valid since - * ".." will contain a reference to - * the current directory and thus be - * non-empty.) - */ - error = 0; - if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) { - error = ENOTEMPTY; - goto out; - } - if ((dp->i_flags & APPEND) - || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) { - error = EPERM; - goto out; - } - /* - * Delete reference to directory before purging - * inode. If we crash in between, the directory - * will be reattached to lost+found, - */ - error = ext2_dirremove(dvp, cnp); - if (error) - goto out; - dp->i_nlink--; - dp->i_flag |= IN_CHANGE; - cache_purge(dvp); - VOP_UNLOCK(dvp, 0); - /* - * Truncate inode. The only stuff left - * in the directory is "." and "..". The - * "." reference is inconsequential since - * we're quashing it. The ".." reference - * has already been adjusted above. We've - * removed the "." reference and the reference - * in the parent directory, but there may be - * other hard links so decrement by 2 and - * worry about them later. - */ - ip->i_nlink -= 2; - error = ext2_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred, - cnp->cn_thread); - cache_purge(ITOV(ip)); - vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); -out: - return (error); -} - -/* - * symlink -- make a symbolic link - */ -static int -ext2_symlink(ap) - struct vop_symlink_args /* { - struct vnode *a_dvp; - struct vnode **a_vpp; - struct componentname *a_cnp; - struct vattr *a_vap; - char *a_target; - } */ *ap; -{ - struct vnode *vp, **vpp = ap->a_vpp; - struct inode *ip; - int len, error; - - error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, - vpp, ap->a_cnp); - if (error) - return (error); - vp = *vpp; - len = strlen(ap->a_target); - if (len < vp->v_mount->mnt_maxsymlinklen) { - ip = VTOI(vp); - bcopy(ap->a_target, (char *)ip->i_shortlink, len); - ip->i_size = len; - ip->i_flag |= IN_CHANGE | IN_UPDATE; - } else - error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, - UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, - ap->a_cnp->cn_cred, NOCRED, NULL, NULL); - if (error) - vput(vp); - return (error); -} - -/* - * Return target name of a symbolic link - */ -static int -ext2_readlink(ap) - struct vop_readlink_args /* { - struct vnode *a_vp; - struct uio *a_uio; - struct ucred *a_cred; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - struct inode *ip = VTOI(vp); - int isize; - - isize = ip->i_size; - if (isize < vp->v_mount->mnt_maxsymlinklen) { - uiomove((char *)ip->i_shortlink, isize, ap->a_uio); - return (0); - } - return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); -} - -/* - * Calculate the logical to physical mapping if not done already, - * then call the device strategy routine. - * - * In order to be able to swap to a file, the ext2_bmaparray() operation may not - * deadlock on memory. See ext2_bmap() for details. - */ -static int -ext2_strategy(ap) - struct vop_strategy_args /* { - struct vnode *a_vp; - struct buf *a_bp; - } */ *ap; -{ - struct buf *bp = ap->a_bp; - struct vnode *vp = ap->a_vp; - struct inode *ip; - struct bufobj *bo; - int32_t blkno; - int error; - - ip = VTOI(vp); - if (vp->v_type == VBLK || vp->v_type == VCHR) - panic("ext2_strategy: spec"); - if (bp->b_blkno == bp->b_lblkno) { - error = ext2_bmaparray(vp, bp->b_lblkno, &blkno, NULL, NULL); - bp->b_blkno = blkno; - if (error) { - bp->b_error = error; - bp->b_ioflags |= BIO_ERROR; - bufdone(bp); - return (0); - } - if ((long)bp->b_blkno == -1) - vfs_bio_clrbuf(bp); - } - if ((long)bp->b_blkno == -1) { - bufdone(bp); - return (0); - } - bp->b_iooffset = dbtob(bp->b_blkno); - bo = VFSTOEXT2(vp->v_mount)->um_bo; - BO_STRATEGY(bo, bp); - return (0); -} - -/* - * Print out the contents of an inode. - */ -static int -ext2_print(ap) - struct vop_print_args /* { - struct vnode *a_vp; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - struct inode *ip = VTOI(vp); - - vn_printf(ip->i_devvp, "\tino %lu", (u_long)ip->i_number); - if (vp->v_type == VFIFO) - fifo_printinfo(vp); - printf("\n"); - return (0); -} - -/* - * Close wrapper for fifos. - * - * Update the times on the inode then do device close. - */ -static int -ext2fifo_close(ap) - struct vop_close_args /* { - struct vnode *a_vp; - int a_fflag; - struct ucred *a_cred; - struct thread *a_td; - } */ *ap; -{ - struct vnode *vp = ap->a_vp; - - VI_LOCK(vp); - if (vp->v_usecount > 1) - ext2_itimes(vp); - VI_UNLOCK(vp); - return (fifo_specops.vop_close(ap)); -} - -/* - * Kqfilter wrapper for fifos. - * - * Fall through to ext2 kqfilter routines if needed - */ -static int -ext2fifo_kqfilter(ap) - struct vop_kqfilter_args *ap; -{ - int error; - - error = fifo_specops.vop_kqfilter(ap); - if (error) - error = vfs_kqfilter(ap); - return (error); -} - -/* - * Return POSIX pathconf information applicable to ext2 filesystems. - */ -static int -ext2_pathconf(ap) - struct vop_pathconf_args /* { - struct vnode *a_vp; - int a_name; - int *a_retval; - } */ *ap; -{ - - switch (ap->a_name) { - case _PC_LINK_MAX: - *ap->a_retval = LINK_MAX; - return (0); - case _PC_NAME_MAX: - *ap->a_retval = NAME_MAX; - return (0); - case _PC_PATH_MAX: - *ap->a_retval = PATH_MAX; - return (0); - case _PC_PIPE_BUF: - *ap->a_retval = PIPE_BUF; - return (0); - case _PC_CHOWN_RESTRICTED: - *ap->a_retval = 1; - return (0); - case _PC_NO_TRUNC: - *ap->a_retval = 1; - return (0); - default: - return (EINVAL); - } - /* NOTREACHED */ -} - -/* - * Vnode pointer to File handle - */ -/* ARGSUSED */ -static int -ext2_vptofh(ap) - struct vop_vptofh_args /* { - struct vnode *a_vp; - struct fid *a_fhp; - } */ *ap; -{ - struct inode *ip; - struct ufid *ufhp; - - ip = VTOI(ap->a_vp); - ufhp = (struct ufid *)ap->a_fhp; - ufhp->ufid_len = sizeof(struct ufid); - ufhp->ufid_ino = ip->i_number; - ufhp->ufid_gen = ip->i_gen; - return (0); -} - -/* - * Initialize the vnode associated with a new inode, handle aliased - * vnodes. - */ -int -ext2_vinit(mntp, fifoops, vpp) - struct mount *mntp; - struct vop_vector *fifoops; - struct vnode **vpp; -{ - struct inode *ip; - struct vnode *vp; - - vp = *vpp; - ip = VTOI(vp); - vp->v_type = IFTOVT(ip->i_mode); - if (vp->v_type == VFIFO) - vp->v_op = fifoops; - - if (ip->i_number == ROOTINO) - vp->v_vflag |= VV_ROOT; - ip->i_modrev = init_va_filerev(); - *vpp = vp; - return (0); -} - -/* - * Allocate a new inode. - */ -static int -ext2_makeinode(mode, dvp, vpp, cnp) - int mode; - struct vnode *dvp; - struct vnode **vpp; - struct componentname *cnp; -{ - struct inode *ip, *pdir; - struct vnode *tvp; - int error; - - pdir = VTOI(dvp); -#ifdef DIAGNOSTIC - if ((cnp->cn_flags & HASBUF) == 0) - panic("ext2_makeinode: no name"); -#endif - *vpp = NULL; - if ((mode & IFMT) == 0) - mode |= IFREG; - - error = ext2_valloc(dvp, mode, cnp->cn_cred, &tvp); - if (error) { - return (error); - } - ip = VTOI(tvp); - ip->i_gid = pdir->i_gid; -#ifdef SUIDDIR - { - /* - * if we are - * not the owner of the directory, - * and we are hacking owners here, (only do this where told to) - * and we are not giving it TOO root, (would subvert quotas) - * then go ahead and give it to the other user. - * Note that this drops off the execute bits for security. - */ - if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) && - (pdir->i_mode & ISUID) && - (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) { - ip->i_uid = pdir->i_uid; - mode &= ~07111; - } else { - ip->i_uid = cnp->cn_cred->cr_uid; - } - } -#else - ip->i_uid = cnp->cn_cred->cr_uid; -#endif - ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; - ip->i_mode = mode; - tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ - ip->i_nlink = 1; - if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred)) { - if (priv_check_cred(cnp->cn_cred, PRIV_VFS_RETAINSUGID, 0)) - ip->i_mode &= ~ISGID; - } - - if (cnp->cn_flags & ISWHITEOUT) - ip->i_flags |= UF_OPAQUE; - - /* - * Make sure inode goes to disk before directory entry. - */ - error = ext2_update(tvp, 1); - if (error) - goto bad; - error = ext2_direnter(ip, dvp, cnp); - if (error) - goto bad; - - *vpp = tvp; - return (0); - -bad: - /* - * Write error occurred trying to update the inode - * or the directory so must deallocate the inode. - */ - ip->i_nlink = 0; - ip->i_flag |= IN_CHANGE; - vput(tvp); - return (error); -} |
