Index: head/sys/compat/linux/linux_stats.c =================================================================== --- head/sys/compat/linux/linux_stats.c (revision 335056) +++ head/sys/compat/linux/linux_stats.c (revision 335057) @@ -1,730 +1,732 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1994-1995 Søren Schmidt * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include __FBSDID("$FreeBSD$"); #include "opt_compat.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef COMPAT_LINUX32 #include #include #else #include #include #endif #include #include static void translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) { int major, minor; if (vp->v_type == VCHR && vp->v_rdev != NULL && linux_driver_get_major_minor(devtoname(vp->v_rdev), &major, &minor) == 0) { sb->st_rdev = (major << 8 | minor); } } static int linux_kern_statat(struct thread *td, int flag, int fd, char *path, enum uio_seg pathseg, struct stat *sbp) { return (kern_statat(td, flag, fd, path, pathseg, sbp, translate_vnhook_major_minor)); } static int linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, struct stat *sbp) { return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); } static int linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, struct stat *sbp) { return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, pathseg, sbp)); } static void translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) { struct file *fp; struct vnode *vp; int major, minor; /* * No capability rights required here. */ if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || fget(td, fd, &cap_no_rights, &fp) != 0) return; vp = fp->f_vnode; if (vp != NULL && vp->v_rdev != NULL && linux_driver_get_major_minor(devtoname(vp->v_rdev), &major, &minor) == 0) { buf->st_rdev = (major << 8 | minor); } else if (fp->f_type == DTYPE_PTS) { struct tty *tp = fp->f_data; /* Convert the numbers for the slave device. */ if (linux_driver_get_major_minor(devtoname(tp->t_dev), &major, &minor) == 0) { buf->st_rdev = (major << 8 | minor); } } fdrop(fp, td); } /* * l_dev_t has the same encoding as dev_t in the latter's low 16 bits, so - * don't bother going through major() and minor(). Keep doing blind - * truncation, as for other fields. The previous version didn't even do - * blind truncation after dev_t was expanded to 64 bits. It failed to - * mask out bits 8-15 in minor(). These bits can only be nonzero in th - * 64-bit version. + * truncation of a dev_t to 16 bits gives the same result as unpacking + * using major() and minor() and repacking in the l_dev_t format. This + * detail is hidden in dev_to_ldev(). Overflow in conversions of dev_t's + * are not checked for, as for other fields. * - * This is only used for st_dev. st_dev is for the mounted-on device so - * it can't be a device that needs very special translation. The translation - * of blind truncation is done here. st_rdev is supposed to be specially - * translated in callers, with the blind truncation done there too and - * st_rdev in the native struct state abused to hold the linux st_rdev. - * Callers do the last step using an open-coded Linux makedev(). + * dev_to_ldev() is only used for translating st_dev. When we convert + * st_rdev for copying it out, it isn't really a dev_t, but has already + * been translated to an l_dev_t in a nontrivial way. Translating it + * again would be illogical but would have no effect since the low 16 + * bits have the same encoding. + * + * The nontrivial translation for st_rdev renumbers some devices, but not + * ones that can be mounted on, so it is consistent with the translation + * for st_dev except when the renumbering or truncation causes conflicts. */ #define dev_to_ldev(d) ((uint16_t)(d)) static int newstat_copyout(struct stat *buf, void *ubuf) { struct l_newstat tbuf; bzero(&tbuf, sizeof(tbuf)); tbuf.st_dev = dev_to_ldev(buf->st_dev); tbuf.st_ino = buf->st_ino; tbuf.st_mode = buf->st_mode; tbuf.st_nlink = buf->st_nlink; tbuf.st_uid = buf->st_uid; tbuf.st_gid = buf->st_gid; tbuf.st_rdev = buf->st_rdev; tbuf.st_size = buf->st_size; tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; tbuf.st_blksize = buf->st_blksize; tbuf.st_blocks = buf->st_blocks; return (copyout(&tbuf, ubuf, sizeof(tbuf))); } int linux_newstat(struct thread *td, struct linux_newstat_args *args) { struct stat buf; char *path; int error; LCONVPATHEXIST(td, args->path, &path); #ifdef DEBUG if (ldebug(newstat)) printf(ARGS(newstat, "%s, *"), path); #endif error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); LFREEPATH(path); if (error) return (error); return (newstat_copyout(&buf, args->buf)); } int linux_newlstat(struct thread *td, struct linux_newlstat_args *args) { struct stat sb; char *path; int error; LCONVPATHEXIST(td, args->path, &path); #ifdef DEBUG if (ldebug(newlstat)) printf(ARGS(newlstat, "%s, *"), path); #endif error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); LFREEPATH(path); if (error) return (error); return (newstat_copyout(&sb, args->buf)); } int linux_newfstat(struct thread *td, struct linux_newfstat_args *args) { struct stat buf; int error; #ifdef DEBUG if (ldebug(newfstat)) printf(ARGS(newfstat, "%d, *"), args->fd); #endif error = kern_fstat(td, args->fd, &buf); translate_fd_major_minor(td, args->fd, &buf); if (!error) error = newstat_copyout(&buf, args->buf); return (error); } #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) static int stat_copyout(struct stat *buf, void *ubuf) { struct l_stat lbuf; bzero(&lbuf, sizeof(lbuf)); lbuf.st_dev = dev_to_ldev(buf->st_dev); lbuf.st_ino = buf->st_ino; lbuf.st_mode = buf->st_mode; lbuf.st_nlink = buf->st_nlink; lbuf.st_uid = buf->st_uid; lbuf.st_gid = buf->st_gid; lbuf.st_rdev = buf->st_rdev; lbuf.st_size = MIN(buf->st_size, INT32_MAX); lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; lbuf.st_blksize = buf->st_blksize; lbuf.st_blocks = buf->st_blocks; lbuf.st_flags = buf->st_flags; lbuf.st_gen = buf->st_gen; return (copyout(&lbuf, ubuf, sizeof(lbuf))); } int linux_stat(struct thread *td, struct linux_stat_args *args) { struct stat buf; char *path; int error; LCONVPATHEXIST(td, args->path, &path); #ifdef DEBUG if (ldebug(stat)) printf(ARGS(stat, "%s, *"), path); #endif error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); if (error) { LFREEPATH(path); return (error); } LFREEPATH(path); return (stat_copyout(&buf, args->up)); } int linux_lstat(struct thread *td, struct linux_lstat_args *args) { struct stat buf; char *path; int error; LCONVPATHEXIST(td, args->path, &path); #ifdef DEBUG if (ldebug(lstat)) printf(ARGS(lstat, "%s, *"), path); #endif error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); if (error) { LFREEPATH(path); return (error); } LFREEPATH(path); return (stat_copyout(&buf, args->up)); } #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ struct l_statfs { l_long f_type; l_long f_bsize; l_long f_blocks; l_long f_bfree; l_long f_bavail; l_long f_files; l_long f_ffree; l_fsid_t f_fsid; l_long f_namelen; l_long f_frsize; l_long f_flags; l_long f_spare[4]; }; #define LINUX_CODA_SUPER_MAGIC 0x73757245L #define LINUX_EXT2_SUPER_MAGIC 0xEF53L #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L #define LINUX_ISOFS_SUPER_MAGIC 0x9660L #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L #define LINUX_NCP_SUPER_MAGIC 0x564cL #define LINUX_NFS_SUPER_MAGIC 0x6969L #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL #define LINUX_PROC_SUPER_MAGIC 0x9fa0L #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L #define LINUX_SHMFS_MAGIC 0x01021994 static long bsd_to_linux_ftype(const char *fstypename) { int i; static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { {"ufs", LINUX_UFS_SUPER_MAGIC}, {"zfs", LINUX_ZFS_SUPER_MAGIC}, {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, {"nfs", LINUX_NFS_SUPER_MAGIC}, {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, {"procfs", LINUX_PROC_SUPER_MAGIC}, {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, {"ntfs", LINUX_NTFS_SUPER_MAGIC}, {"nwfs", LINUX_NCP_SUPER_MAGIC}, {"hpfs", LINUX_HPFS_SUPER_MAGIC}, {"coda", LINUX_CODA_SUPER_MAGIC}, {"devfs", LINUX_DEVFS_SUPER_MAGIC}, {"tmpfs", LINUX_SHMFS_MAGIC}, {NULL, 0L}}; for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) return (b2l_tbl[i].linux_type); return (0L); } static int bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) { #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) uint64_t tmp; #define LINUX_HIBITS 0xffffffff00000000ULL tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | bsd_statfs->f_bsize; if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || (tmp & LINUX_HIBITS)) return (EOVERFLOW); #undef LINUX_HIBITS #endif linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); linux_statfs->f_bsize = bsd_statfs->f_bsize; linux_statfs->f_blocks = bsd_statfs->f_blocks; linux_statfs->f_bfree = bsd_statfs->f_bfree; linux_statfs->f_bavail = bsd_statfs->f_bavail; linux_statfs->f_ffree = bsd_statfs->f_ffree; linux_statfs->f_files = bsd_statfs->f_files; linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; linux_statfs->f_namelen = MAXNAMLEN; linux_statfs->f_frsize = bsd_statfs->f_bsize; linux_statfs->f_flags = 0; memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); return (0); } int linux_statfs(struct thread *td, struct linux_statfs_args *args) { struct l_statfs linux_statfs; struct statfs *bsd_statfs; char *path; int error; LCONVPATHEXIST(td, args->path, &path); #ifdef DEBUG if (ldebug(statfs)) printf(ARGS(statfs, "%s, *"), path); #endif bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); LFREEPATH(path); if (error == 0) error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); free(bsd_statfs, M_STATFS); if (error != 0) return (error); return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); } #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) static void bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) { linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); linux_statfs->f_bsize = bsd_statfs->f_bsize; linux_statfs->f_blocks = bsd_statfs->f_blocks; linux_statfs->f_bfree = bsd_statfs->f_bfree; linux_statfs->f_bavail = bsd_statfs->f_bavail; linux_statfs->f_ffree = bsd_statfs->f_ffree; linux_statfs->f_files = bsd_statfs->f_files; linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; linux_statfs->f_namelen = MAXNAMLEN; linux_statfs->f_frsize = bsd_statfs->f_bsize; linux_statfs->f_flags = 0; memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); } int linux_statfs64(struct thread *td, struct linux_statfs64_args *args) { struct l_statfs64 linux_statfs; struct statfs *bsd_statfs; char *path; int error; if (args->bufsize != sizeof(struct l_statfs64)) return (EINVAL); LCONVPATHEXIST(td, args->path, &path); #ifdef DEBUG if (ldebug(statfs64)) printf(ARGS(statfs64, "%s, *"), path); #endif bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); LFREEPATH(path); if (error == 0) bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); free(bsd_statfs, M_STATFS); if (error != 0) return (error); return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); } int linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) { struct l_statfs64 linux_statfs; struct statfs *bsd_statfs; int error; #ifdef DEBUG if (ldebug(fstatfs64)) printf(ARGS(fstatfs64, "%d, *"), args->fd); #endif if (args->bufsize != sizeof(struct l_statfs64)) return (EINVAL); bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fstatfs(td, args->fd, bsd_statfs); if (error == 0) bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); free(bsd_statfs, M_STATFS); if (error != 0) return (error); return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); } #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ int linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) { struct l_statfs linux_statfs; struct statfs *bsd_statfs; int error; #ifdef DEBUG if (ldebug(fstatfs)) printf(ARGS(fstatfs, "%d, *"), args->fd); #endif bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fstatfs(td, args->fd, bsd_statfs); if (error == 0) error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); free(bsd_statfs, M_STATFS); if (error != 0) return (error); return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); } struct l_ustat { l_daddr_t f_tfree; l_ino_t f_tinode; char f_fname[6]; char f_fpack[6]; }; int linux_ustat(struct thread *td, struct linux_ustat_args *args) { #ifdef DEBUG if (ldebug(ustat)) printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); #endif return (EOPNOTSUPP); } #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) static int stat64_copyout(struct stat *buf, void *ubuf) { struct l_stat64 lbuf; bzero(&lbuf, sizeof(lbuf)); lbuf.st_dev = dev_to_ldev(buf->st_dev); lbuf.st_ino = buf->st_ino; lbuf.st_mode = buf->st_mode; lbuf.st_nlink = buf->st_nlink; lbuf.st_uid = buf->st_uid; lbuf.st_gid = buf->st_gid; lbuf.st_rdev = buf->st_rdev; lbuf.st_size = buf->st_size; lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; lbuf.st_blksize = buf->st_blksize; lbuf.st_blocks = buf->st_blocks; /* * The __st_ino field makes all the difference. In the Linux kernel * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, * but without the assignment to __st_ino the runtime linker refuses * to mmap(2) any shared libraries. I guess it's broken alright :-) */ lbuf.__st_ino = buf->st_ino; return (copyout(&lbuf, ubuf, sizeof(lbuf))); } int linux_stat64(struct thread *td, struct linux_stat64_args *args) { struct stat buf; char *filename; int error; LCONVPATHEXIST(td, args->filename, &filename); #ifdef DEBUG if (ldebug(stat64)) printf(ARGS(stat64, "%s, *"), filename); #endif error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); LFREEPATH(filename); if (error) return (error); return (stat64_copyout(&buf, args->statbuf)); } int linux_lstat64(struct thread *td, struct linux_lstat64_args *args) { struct stat sb; char *filename; int error; LCONVPATHEXIST(td, args->filename, &filename); #ifdef DEBUG if (ldebug(lstat64)) printf(ARGS(lstat64, "%s, *"), args->filename); #endif error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); LFREEPATH(filename); if (error) return (error); return (stat64_copyout(&sb, args->statbuf)); } int linux_fstat64(struct thread *td, struct linux_fstat64_args *args) { struct stat buf; int error; #ifdef DEBUG if (ldebug(fstat64)) printf(ARGS(fstat64, "%d, *"), args->fd); #endif error = kern_fstat(td, args->fd, &buf); translate_fd_major_minor(td, args->fd, &buf); if (!error) error = stat64_copyout(&buf, args->statbuf); return (error); } int linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) { char *path; int error, dfd, flag; struct stat buf; if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) return (EINVAL); flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? AT_SYMLINK_NOFOLLOW : 0; dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); #ifdef DEBUG if (ldebug(fstatat64)) printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); #endif error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); if (!error) error = stat64_copyout(&buf, args->statbuf); LFREEPATH(path); return (error); } #else /* __amd64__ && !COMPAT_LINUX32 */ int linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) { char *path; int error, dfd, flag; struct stat buf; if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) return (EINVAL); flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? AT_SYMLINK_NOFOLLOW : 0; dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); #ifdef DEBUG if (ldebug(newfstatat)) printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); #endif error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); if (error == 0) error = newstat_copyout(&buf, args->statbuf); LFREEPATH(path); return (error); } #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ int linux_syncfs(struct thread *td, struct linux_syncfs_args *args) { struct mount *mp; struct vnode *vp; int error, save; error = fgetvp(td, args->fd, &cap_fsync_rights, &vp); if (error != 0) /* * Linux syncfs() returns only EBADF, however fgetvp() * can return EINVAL in case of file descriptor does * not represent a vnode. XXX. */ return (error); mp = vp->v_mount; mtx_lock(&mountlist_mtx); error = vfs_busy(mp, MBF_MNTLSTLOCK); if (error != 0) { /* See comment above. */ mtx_unlock(&mountlist_mtx); goto out; } if ((mp->mnt_flag & MNT_RDONLY) == 0 && vn_start_write(NULL, &mp, V_NOWAIT) == 0) { save = curthread_pflags_set(TDP_SYNCIO); vfs_msync(mp, MNT_NOWAIT); VFS_SYNC(mp, MNT_NOWAIT); curthread_pflags_restore(save); vn_finished_write(mp); } vfs_unbusy(mp); out: vrele(vp); return (error); }