mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
91d5354a2c
- struct plimit includes a mutex to protect a reference count. The plimit structure is treated similarly to struct ucred in that is is always copy on write, so having a reference to a structure is sufficient to read from it without needing a further lock. - The proc lock protects the p_limit pointer and must be held while reading limits from a process to keep the limit structure from changing out from under you while reading from it. - Various global limits that are ints are not protected by a lock since int writes are atomic on all the archs we support and thus a lock wouldn't buy us anything. - All accesses to individual resource limits from a process are abstracted behind a simple lim_rlimit(), lim_max(), and lim_cur() API that return either an rlimit, or the current or max individual limit of the specified resource from a process. - dosetrlimit() was renamed to kern_setrlimit() to match existing style of other similar syscall helper functions. - The alpha OSF/1 compat layer no longer calls getrlimit() and setrlimit() (it didn't used the stackgap when it should have) but uses lim_rlimit() and kern_setrlimit() instead. - The svr4 compat no longer uses the stackgap for resource limits calls, but uses lim_rlimit() and kern_setrlimit() instead. - The ibcs2 compat no longer uses the stackgap for resource limits. It also no longer uses the stackgap for accessing sysctl's for the ibcs2_sysconf() syscall but uses kernel_sysctl() instead. As a result, ibcs2_sysconf() no longer needs Giant. - The p_rlimit macro no longer exists. Submitted by: mtm (mostly, I only did a few cleanups and catchups) Tested on: i386 Compiled on: alpha, amd64
1893 lines
49 KiB
C
1893 lines
49 KiB
C
/* $FreeBSD$ */
|
|
/* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */
|
|
|
|
/*-
|
|
* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
|
|
* Copyright (C) 1994, 1995, 1997 TooLs GmbH.
|
|
* All rights reserved.
|
|
* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by TooLs GmbH.
|
|
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
|
|
*/
|
|
/*
|
|
* Written by Paul Popelka (paulp@uts.amdahl.com)
|
|
*
|
|
* You can do anything you want with this software, just don't say you wrote
|
|
* it, and don't remove this notice.
|
|
*
|
|
* This software is provided "as is".
|
|
*
|
|
* The author supplies this software to be publicly redistributed on the
|
|
* understanding that the author is not responsible for the correct
|
|
* functioning of this software in any circumstances and is not liable for
|
|
* any damages caused by this software.
|
|
*
|
|
* October 1992
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/lockf.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/resourcevar.h> /* defines plimit structure in proc struct */
|
|
#include <sys/kernel.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/dirent.h>
|
|
#include <sys/signalvar.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_extern.h>
|
|
#include <vm/vnode_pager.h>
|
|
|
|
#include <machine/mutex.h>
|
|
|
|
#include <fs/msdosfs/bpb.h>
|
|
#include <fs/msdosfs/msdosfsmount.h>
|
|
#include <fs/msdosfs/direntry.h>
|
|
#include <fs/msdosfs/denode.h>
|
|
#include <fs/msdosfs/fat.h>
|
|
|
|
#define DOS_FILESIZE_MAX 0xffffffff
|
|
|
|
/*
|
|
* Prototypes for MSDOSFS vnode operations
|
|
*/
|
|
static int msdosfs_advlock(struct vop_advlock_args *);
|
|
static int msdosfs_create(struct vop_create_args *);
|
|
static int msdosfs_mknod(struct vop_mknod_args *);
|
|
static int msdosfs_close(struct vop_close_args *);
|
|
static int msdosfs_access(struct vop_access_args *);
|
|
static int msdosfs_getattr(struct vop_getattr_args *);
|
|
static int msdosfs_setattr(struct vop_setattr_args *);
|
|
static int msdosfs_read(struct vop_read_args *);
|
|
static int msdosfs_write(struct vop_write_args *);
|
|
static int msdosfs_fsync(struct vop_fsync_args *);
|
|
static int msdosfs_remove(struct vop_remove_args *);
|
|
static int msdosfs_link(struct vop_link_args *);
|
|
static int msdosfs_rename(struct vop_rename_args *);
|
|
static int msdosfs_mkdir(struct vop_mkdir_args *);
|
|
static int msdosfs_rmdir(struct vop_rmdir_args *);
|
|
static int msdosfs_symlink(struct vop_symlink_args *);
|
|
static int msdosfs_readdir(struct vop_readdir_args *);
|
|
static int msdosfs_bmap(struct vop_bmap_args *);
|
|
static int msdosfs_strategy(struct vop_strategy_args *);
|
|
static int msdosfs_print(struct vop_print_args *);
|
|
static int msdosfs_pathconf(struct vop_pathconf_args *ap);
|
|
|
|
/*
|
|
* Some general notes:
|
|
*
|
|
* In the ufs filesystem the inodes, superblocks, and indirect blocks are
|
|
* read/written using the vnode for the filesystem. Blocks that represent
|
|
* the contents of a file are read/written using the vnode for the file
|
|
* (including directories when they are read/written as files). This
|
|
* presents problems for the dos filesystem because data that should be in
|
|
* an inode (if dos had them) resides in the directory itself. Since we
|
|
* must update directory entries without the benefit of having the vnode
|
|
* for the directory we must use the vnode for the filesystem. This means
|
|
* that when a directory is actually read/written (via read, write, or
|
|
* readdir, or seek) we must use the vnode for the filesystem instead of
|
|
* the vnode for the directory as would happen in ufs. This is to insure we
|
|
* retreive the correct block from the buffer cache since the hash value is
|
|
* based upon the vnode address and the desired block number.
|
|
*/
|
|
|
|
/*
|
|
* Create a regular file. On entry the directory to contain the file being
|
|
* created is locked. We must release before we return. We must also free
|
|
* the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
|
|
* only if the SAVESTART bit in cn_flags is clear on success.
|
|
*/
|
|
static int
|
|
msdosfs_create(ap)
|
|
struct vop_create_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
} */ *ap;
|
|
{
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct denode ndirent;
|
|
struct denode *dep;
|
|
struct denode *pdep = VTODE(ap->a_dvp);
|
|
struct timespec ts;
|
|
int error;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
|
|
#endif
|
|
|
|
/*
|
|
* If this is the root directory and there is no space left we
|
|
* can't do anything. This is because the root directory can not
|
|
* change size.
|
|
*/
|
|
if (pdep->de_StartCluster == MSDOSFSROOT
|
|
&& pdep->de_fndoffset >= pdep->de_FileSize) {
|
|
error = ENOSPC;
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Create a directory entry for the file, then call createde() to
|
|
* have it installed. NOTE: DOS files are always executable. We
|
|
* use the absence of the owner write bit to make the file
|
|
* readonly.
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if ((cnp->cn_flags & HASBUF) == 0)
|
|
panic("msdosfs_create: no name");
|
|
#endif
|
|
bzero(&ndirent, sizeof(ndirent));
|
|
error = uniqdosname(pdep, cnp, ndirent.de_Name);
|
|
if (error)
|
|
goto bad;
|
|
|
|
ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
|
|
ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
|
|
ndirent.de_LowerCase = 0;
|
|
ndirent.de_StartCluster = 0;
|
|
ndirent.de_FileSize = 0;
|
|
ndirent.de_dev = pdep->de_dev;
|
|
ndirent.de_devvp = pdep->de_devvp;
|
|
ndirent.de_pmp = pdep->de_pmp;
|
|
ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
|
|
getnanotime(&ts);
|
|
DETIMES(&ndirent, &ts, &ts, &ts);
|
|
error = createde(&ndirent, pdep, &dep, cnp);
|
|
if (error)
|
|
goto bad;
|
|
*ap->a_vpp = DETOV(dep);
|
|
return (0);
|
|
|
|
bad:
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
msdosfs_mknod(ap)
|
|
struct vop_mknod_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
} */ *ap;
|
|
{
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
msdosfs_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;
|
|
struct denode *dep = VTODE(vp);
|
|
struct timespec ts;
|
|
|
|
VI_LOCK(vp);
|
|
if (vp->v_usecount > 1) {
|
|
getnanotime(&ts);
|
|
DETIMES(dep, &ts, &ts, &ts);
|
|
}
|
|
VI_UNLOCK(vp);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
msdosfs_access(ap)
|
|
struct vop_access_args /* {
|
|
struct vnode *a_vp;
|
|
int a_mode;
|
|
struct ucred *a_cred;
|
|
struct thread *a_td;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
mode_t file_mode, mode = ap->a_mode;
|
|
|
|
file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
|
|
((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
|
|
file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
|
|
|
|
/*
|
|
* Disallow write attempts on read-only filesystems;
|
|
* unless the file is a socket, fifo, or a block or
|
|
* character device resident on the filesystem.
|
|
*/
|
|
if (mode & VWRITE) {
|
|
switch (vp->v_type) {
|
|
case VDIR:
|
|
case VLNK:
|
|
case VREG:
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid,
|
|
ap->a_mode, ap->a_cred, NULL));
|
|
}
|
|
|
|
static int
|
|
msdosfs_getattr(ap)
|
|
struct vop_getattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct thread *a_td;
|
|
} */ *ap;
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct vattr *vap = ap->a_vap;
|
|
mode_t mode;
|
|
struct timespec ts;
|
|
u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
|
|
u_long fileid;
|
|
|
|
getnanotime(&ts);
|
|
DETIMES(dep, &ts, &ts, &ts);
|
|
vap->va_fsid = dev2udev(dep->de_dev);
|
|
/*
|
|
* The following computation of the fileid must be the same as that
|
|
* used in msdosfs_readdir() to compute d_fileno. If not, pwd
|
|
* doesn't work.
|
|
*/
|
|
if (dep->de_Attributes & ATTR_DIRECTORY) {
|
|
fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
|
|
if (dep->de_StartCluster == MSDOSFSROOT)
|
|
fileid = 1;
|
|
} else {
|
|
fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
|
|
if (dep->de_dirclust == MSDOSFSROOT)
|
|
fileid = roottobn(pmp, 0) * dirsperblk;
|
|
fileid += dep->de_diroffset / sizeof(struct direntry);
|
|
}
|
|
vap->va_fileid = fileid;
|
|
if ((dep->de_Attributes & ATTR_READONLY) == 0)
|
|
mode = S_IRWXU|S_IRWXG|S_IRWXO;
|
|
else
|
|
mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
|
|
vap->va_mode = mode &
|
|
(ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
|
|
vap->va_uid = pmp->pm_uid;
|
|
vap->va_gid = pmp->pm_gid;
|
|
vap->va_nlink = 1;
|
|
vap->va_rdev = 0;
|
|
vap->va_size = dep->de_FileSize;
|
|
dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
|
|
if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
|
|
dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
|
|
dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
|
|
} else {
|
|
vap->va_atime = vap->va_mtime;
|
|
vap->va_ctime = vap->va_mtime;
|
|
}
|
|
vap->va_flags = 0;
|
|
if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
|
|
vap->va_flags |= SF_ARCHIVED;
|
|
vap->va_gen = 0;
|
|
vap->va_blocksize = pmp->pm_bpcluster;
|
|
vap->va_bytes =
|
|
(dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
|
|
vap->va_type = ap->a_vp->v_type;
|
|
vap->va_filerev = dep->de_modrev;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
msdosfs_setattr(ap)
|
|
struct vop_setattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct thread *a_td;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct ucred *cred = ap->a_cred;
|
|
int error = 0;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
|
|
ap->a_vp, vap, cred, ap->a_td);
|
|
#endif
|
|
|
|
/*
|
|
* 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) ||
|
|
(vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_setattr(): returning EINVAL\n");
|
|
printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
|
|
vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
|
|
printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
|
|
vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
|
|
printf(" va_uid %x, va_gid %x\n",
|
|
vap->va_uid, vap->va_gid);
|
|
#endif
|
|
return (EINVAL);
|
|
}
|
|
if (vap->va_flags != VNOVAL) {
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
if (cred->cr_uid != pmp->pm_uid &&
|
|
(error = suser_cred(cred, PRISON_ROOT)))
|
|
return (error);
|
|
/*
|
|
* We are very inconsistent about handling unsupported
|
|
* attributes. We ignored the access time and the
|
|
* read and execute bits. We were strict for the other
|
|
* attributes.
|
|
*
|
|
* Here we are strict, stricter than ufs in not allowing
|
|
* users to attempt to set SF_SETTABLE bits or anyone to
|
|
* set unsupported bits. However, we ignore attempts to
|
|
* set ATTR_ARCHIVE for directories `cp -pr' from a more
|
|
* sensible filesystem attempts it a lot.
|
|
*/
|
|
if (suser_cred(cred, PRISON_ROOT)) {
|
|
if (vap->va_flags & SF_SETTABLE)
|
|
return EPERM;
|
|
}
|
|
if (vap->va_flags & ~SF_ARCHIVED)
|
|
return EOPNOTSUPP;
|
|
if (vap->va_flags & SF_ARCHIVED)
|
|
dep->de_Attributes &= ~ATTR_ARCHIVE;
|
|
else if (!(dep->de_Attributes & ATTR_DIRECTORY))
|
|
dep->de_Attributes |= ATTR_ARCHIVE;
|
|
dep->de_flag |= DE_MODIFIED;
|
|
}
|
|
|
|
if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
|
|
uid_t uid;
|
|
gid_t gid;
|
|
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
uid = vap->va_uid;
|
|
if (uid == (uid_t)VNOVAL)
|
|
uid = pmp->pm_uid;
|
|
gid = vap->va_gid;
|
|
if (gid == (gid_t)VNOVAL)
|
|
gid = pmp->pm_gid;
|
|
if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
|
|
(gid != pmp->pm_gid && !groupmember(gid, cred))) &&
|
|
(error = suser_cred(cred, PRISON_ROOT)))
|
|
return error;
|
|
if (uid != pmp->pm_uid || gid != pmp->pm_gid)
|
|
return EINVAL;
|
|
}
|
|
|
|
if (vap->va_size != VNOVAL) {
|
|
/*
|
|
* Disallow write attempts on read-only filesystems;
|
|
* unless the file is a socket, fifo, or a block or
|
|
* character device resident on the filesystem.
|
|
*/
|
|
switch (vp->v_type) {
|
|
case VDIR:
|
|
return (EISDIR);
|
|
/* NOT REACHED */
|
|
case VLNK:
|
|
case VREG:
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
error = detrunc(dep, vap->va_size, 0, cred, ap->a_td);
|
|
if (error)
|
|
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);
|
|
if (cred->cr_uid != pmp->pm_uid &&
|
|
(error = suser_cred(cred, PRISON_ROOT)) &&
|
|
((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
|
|
(error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td))))
|
|
return (error);
|
|
if (vp->v_type != VDIR) {
|
|
if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
|
|
vap->va_atime.tv_sec != VNOVAL) {
|
|
dep->de_flag &= ~DE_ACCESS;
|
|
unix2dostime(&vap->va_atime, &dep->de_ADate,
|
|
NULL, NULL);
|
|
}
|
|
if (vap->va_mtime.tv_sec != VNOVAL) {
|
|
dep->de_flag &= ~DE_UPDATE;
|
|
unix2dostime(&vap->va_mtime, &dep->de_MDate,
|
|
&dep->de_MTime, NULL);
|
|
}
|
|
dep->de_Attributes |= ATTR_ARCHIVE;
|
|
dep->de_flag |= DE_MODIFIED;
|
|
}
|
|
}
|
|
/*
|
|
* DOS files only have the ability to have their writability
|
|
* attribute set, so we use the owner write bit to set the readonly
|
|
* attribute.
|
|
*/
|
|
if (vap->va_mode != (mode_t)VNOVAL) {
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
if (cred->cr_uid != pmp->pm_uid &&
|
|
(error = suser_cred(cred, PRISON_ROOT)))
|
|
return (error);
|
|
if (vp->v_type != VDIR) {
|
|
/* We ignore the read and execute bits. */
|
|
if (vap->va_mode & VWRITE)
|
|
dep->de_Attributes &= ~ATTR_READONLY;
|
|
else
|
|
dep->de_Attributes |= ATTR_READONLY;
|
|
dep->de_Attributes |= ATTR_ARCHIVE;
|
|
dep->de_flag |= DE_MODIFIED;
|
|
}
|
|
}
|
|
return (deupdat(dep, 1));
|
|
}
|
|
|
|
static int
|
|
msdosfs_read(ap)
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
int error = 0;
|
|
int blsize;
|
|
int isadir;
|
|
int orig_resid;
|
|
u_int n;
|
|
u_long diff;
|
|
u_long on;
|
|
daddr_t lbn;
|
|
daddr_t rablock;
|
|
int rasize;
|
|
int seqcount;
|
|
struct buf *bp;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct denode *dep = VTODE(vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct uio *uio = ap->a_uio;
|
|
|
|
if (uio->uio_offset < 0)
|
|
return (EINVAL);
|
|
|
|
if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
|
|
return (0);
|
|
/*
|
|
* If they didn't ask for any data, then we are done.
|
|
*/
|
|
orig_resid = uio->uio_resid;
|
|
if (orig_resid <= 0)
|
|
return (0);
|
|
|
|
seqcount = ap->a_ioflag >> IO_SEQSHIFT;
|
|
|
|
isadir = dep->de_Attributes & ATTR_DIRECTORY;
|
|
do {
|
|
if (uio->uio_offset >= dep->de_FileSize)
|
|
break;
|
|
lbn = de_cluster(pmp, uio->uio_offset);
|
|
/*
|
|
* If we are operating on a directory file then be sure to
|
|
* do i/o with the vnode for the filesystem instead of the
|
|
* vnode for the directory.
|
|
*/
|
|
if (isadir) {
|
|
/* convert cluster # to block # */
|
|
error = pcbmap(dep, lbn, &lbn, 0, &blsize);
|
|
if (error == E2BIG) {
|
|
error = EINVAL;
|
|
break;
|
|
} else if (error)
|
|
break;
|
|
error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp);
|
|
} else {
|
|
blsize = pmp->pm_bpcluster;
|
|
rablock = lbn + 1;
|
|
if (seqcount > 1 &&
|
|
de_cn2off(pmp, rablock) < dep->de_FileSize) {
|
|
rasize = pmp->pm_bpcluster;
|
|
error = breadn(vp, lbn, blsize,
|
|
&rablock, &rasize, 1, NOCRED, &bp);
|
|
} else {
|
|
error = bread(vp, lbn, blsize, NOCRED, &bp);
|
|
}
|
|
}
|
|
if (error) {
|
|
brelse(bp);
|
|
break;
|
|
}
|
|
on = uio->uio_offset & pmp->pm_crbomask;
|
|
diff = pmp->pm_bpcluster - on;
|
|
n = diff > uio->uio_resid ? uio->uio_resid : diff;
|
|
diff = dep->de_FileSize - uio->uio_offset;
|
|
if (diff < n)
|
|
n = diff;
|
|
diff = blsize - bp->b_resid;
|
|
if (diff < n)
|
|
n = diff;
|
|
error = uiomove(bp->b_data + on, (int) n, uio);
|
|
brelse(bp);
|
|
} while (error == 0 && uio->uio_resid > 0 && n != 0);
|
|
if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
|
|
(vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
|
|
dep->de_flag |= DE_ACCESS;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Write data to a file or directory.
|
|
*/
|
|
static int
|
|
msdosfs_write(ap)
|
|
struct vop_write_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
int n;
|
|
int croffset;
|
|
int resid;
|
|
u_long osize;
|
|
int error = 0;
|
|
u_long count;
|
|
daddr_t bn, lastcn;
|
|
struct buf *bp;
|
|
int ioflag = ap->a_ioflag;
|
|
struct uio *uio = ap->a_uio;
|
|
struct thread *td = uio->uio_td;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *thisvp;
|
|
struct denode *dep = VTODE(vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct ucred *cred = ap->a_cred;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
|
|
vp, uio, ioflag, cred);
|
|
printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
|
|
dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
|
|
#endif
|
|
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
if (ioflag & IO_APPEND)
|
|
uio->uio_offset = dep->de_FileSize;
|
|
thisvp = vp;
|
|
break;
|
|
case VDIR:
|
|
return EISDIR;
|
|
default:
|
|
panic("msdosfs_write(): bad file type");
|
|
}
|
|
|
|
if (uio->uio_offset < 0)
|
|
return (EFBIG);
|
|
|
|
if (uio->uio_resid == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* If they've exceeded their filesize limit, tell them about it.
|
|
*/
|
|
if (td != NULL) {
|
|
PROC_LOCK(td->td_proc);
|
|
if ((uoff_t)uio->uio_offset + uio->uio_resid >
|
|
lim_cur(td->td_proc, RLIMIT_FSIZE)) {
|
|
psignal(td->td_proc, SIGXFSZ);
|
|
PROC_UNLOCK(td->td_proc);
|
|
return (EFBIG);
|
|
}
|
|
PROC_UNLOCK(td->td_proc);
|
|
}
|
|
|
|
if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
|
|
return (EFBIG);
|
|
|
|
/*
|
|
* If the offset we are starting the write at is beyond the end of
|
|
* the file, then they've done a seek. Unix filesystems allow
|
|
* files with holes in them, DOS doesn't so we must fill the hole
|
|
* with zeroed blocks.
|
|
*/
|
|
if (uio->uio_offset > dep->de_FileSize) {
|
|
error = deextend(dep, uio->uio_offset, cred);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remember some values in case the write fails.
|
|
*/
|
|
resid = uio->uio_resid;
|
|
osize = dep->de_FileSize;
|
|
|
|
/*
|
|
* If we write beyond the end of the file, extend it to its ultimate
|
|
* size ahead of the time to hopefully get a contiguous area.
|
|
*/
|
|
if (uio->uio_offset + resid > osize) {
|
|
count = de_clcount(pmp, uio->uio_offset + resid) -
|
|
de_clcount(pmp, osize);
|
|
error = extendfile(dep, count, NULL, NULL, 0);
|
|
if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
|
|
goto errexit;
|
|
lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
|
|
} else
|
|
lastcn = de_clcount(pmp, osize) - 1;
|
|
|
|
do {
|
|
if (de_cluster(pmp, uio->uio_offset) > lastcn) {
|
|
error = ENOSPC;
|
|
break;
|
|
}
|
|
|
|
croffset = uio->uio_offset & pmp->pm_crbomask;
|
|
n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
|
|
if (uio->uio_offset + n > dep->de_FileSize) {
|
|
dep->de_FileSize = uio->uio_offset + n;
|
|
/* The object size needs to be set before buffer is allocated */
|
|
vnode_pager_setsize(vp, dep->de_FileSize);
|
|
}
|
|
|
|
bn = de_cluster(pmp, uio->uio_offset);
|
|
if ((uio->uio_offset & pmp->pm_crbomask) == 0
|
|
&& (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
|
|
> de_cluster(pmp, uio->uio_offset)
|
|
|| uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
|
|
/*
|
|
* If either the whole cluster gets written,
|
|
* or we write the cluster from its start beyond EOF,
|
|
* then no need to read data from disk.
|
|
*/
|
|
bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0);
|
|
clrbuf(bp);
|
|
/*
|
|
* Do the bmap now, since pcbmap needs buffers
|
|
* for the fat table. (see msdosfs_strategy)
|
|
*/
|
|
if (bp->b_blkno == bp->b_lblkno) {
|
|
error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0);
|
|
if (error)
|
|
bp->b_blkno = -1;
|
|
else
|
|
bp->b_blkno = bn;
|
|
}
|
|
if (bp->b_blkno == -1) {
|
|
brelse(bp);
|
|
if (!error)
|
|
error = EIO; /* XXX */
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* The block we need to write into exists, so read it in.
|
|
*/
|
|
error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Should these vnode_pager_* functions be done on dir
|
|
* files?
|
|
*/
|
|
|
|
/*
|
|
* Copy the data from user space into the buf header.
|
|
*/
|
|
error = uiomove(bp->b_data + croffset, n, uio);
|
|
if (error) {
|
|
brelse(bp);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If they want this synchronous then write it and wait for
|
|
* it. Otherwise, if on a cluster boundary write it
|
|
* asynchronously so we can move on to the next block
|
|
* without delay. Otherwise do a delayed write because we
|
|
* may want to write somemore into the block later.
|
|
*/
|
|
if (ioflag & IO_SYNC)
|
|
(void) bwrite(bp);
|
|
else if (n + croffset == pmp->pm_bpcluster)
|
|
bawrite(bp);
|
|
else
|
|
bdwrite(bp);
|
|
dep->de_flag |= DE_UPDATE;
|
|
} while (error == 0 && uio->uio_resid > 0);
|
|
|
|
/*
|
|
* If the write failed and they want us to, truncate the file back
|
|
* to the size it was before the write was attempted.
|
|
*/
|
|
errexit:
|
|
if (error) {
|
|
if (ioflag & IO_UNIT) {
|
|
detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL);
|
|
uio->uio_offset -= resid - uio->uio_resid;
|
|
uio->uio_resid = resid;
|
|
} else {
|
|
detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL);
|
|
if (uio->uio_resid != resid)
|
|
error = 0;
|
|
}
|
|
} else if (ioflag & IO_SYNC)
|
|
error = deupdat(dep, 1);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Flush the blocks of a file to disk.
|
|
*
|
|
* This function is worthless for vnodes that represent directories. Maybe we
|
|
* could just do a sync if they try an fsync on a directory file.
|
|
*/
|
|
static int
|
|
msdosfs_fsync(ap)
|
|
struct vop_fsync_args /* {
|
|
struct vnode *a_vp;
|
|
struct ucred *a_cred;
|
|
int a_waitfor;
|
|
struct thread *a_td;
|
|
} */ *ap;
|
|
{
|
|
/*
|
|
* Flush our dirty buffers.
|
|
*/
|
|
vop_stdfsync(ap);
|
|
|
|
return (deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT));
|
|
}
|
|
|
|
static int
|
|
msdosfs_remove(ap)
|
|
struct vop_remove_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode *a_vp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap;
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct denode *ddep = VTODE(ap->a_dvp);
|
|
int error;
|
|
|
|
if (ap->a_vp->v_type == VDIR)
|
|
error = EPERM;
|
|
else
|
|
error = removede(ddep, dep);
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* DOS filesystems don't know what links are.
|
|
*/
|
|
static int
|
|
msdosfs_link(ap)
|
|
struct vop_link_args /* {
|
|
struct vnode *a_tdvp;
|
|
struct vnode *a_vp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap;
|
|
{
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* Renames on files require moving the denode to a new hash queue since the
|
|
* denode's location is used to compute which hash queue to put the file
|
|
* in. Unless it is a rename in place. For example "mv a b".
|
|
*
|
|
* What follows is the basic algorithm:
|
|
*
|
|
* if (file move) {
|
|
* if (dest file exists) {
|
|
* remove dest file
|
|
* }
|
|
* if (dest and src in same directory) {
|
|
* rewrite name in existing directory slot
|
|
* } else {
|
|
* write new entry in dest directory
|
|
* update offset and dirclust in denode
|
|
* move denode to new hash chain
|
|
* clear old directory entry
|
|
* }
|
|
* } else {
|
|
* directory move
|
|
* if (dest directory exists) {
|
|
* if (dest is not empty) {
|
|
* return ENOTEMPTY
|
|
* }
|
|
* remove dest directory
|
|
* }
|
|
* if (dest and src in same directory) {
|
|
* rewrite name in existing entry
|
|
* } else {
|
|
* be sure dest is not a child of src directory
|
|
* write entry in dest directory
|
|
* update "." and ".." in moved directory
|
|
* clear old directory entry for moved directory
|
|
* }
|
|
* }
|
|
*
|
|
* On entry:
|
|
* source's parent directory is unlocked
|
|
* source file or directory is unlocked
|
|
* destination's parent directory is locked
|
|
* destination file or directory is locked if it exists
|
|
*
|
|
* On exit:
|
|
* all denodes should be released
|
|
*/
|
|
static int
|
|
msdosfs_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 *tdvp = ap->a_tdvp;
|
|
struct vnode *fvp = ap->a_fvp;
|
|
struct vnode *fdvp = ap->a_fdvp;
|
|
struct vnode *tvp = ap->a_tvp;
|
|
struct componentname *tcnp = ap->a_tcnp;
|
|
struct componentname *fcnp = ap->a_fcnp;
|
|
struct thread *td = fcnp->cn_thread;
|
|
struct denode *ip, *xp, *dp, *zp;
|
|
u_char toname[11], oldname[11];
|
|
u_long from_diroffset, to_diroffset;
|
|
u_char to_count;
|
|
int doingdirectory = 0, newparent = 0;
|
|
int error;
|
|
u_long cn;
|
|
daddr_t bn;
|
|
struct denode *fddep; /* from file's parent directory */
|
|
struct msdosfsmount *pmp;
|
|
struct direntry *dotdotp;
|
|
struct buf *bp;
|
|
|
|
fddep = VTODE(ap->a_fdvp);
|
|
pmp = fddep->de_pmp;
|
|
|
|
pmp = VFSTOMSDOSFS(fdvp->v_mount);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if ((tcnp->cn_flags & HASBUF) == 0 ||
|
|
(fcnp->cn_flags & HASBUF) == 0)
|
|
panic("msdosfs_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 source and dest are the same, do nothing.
|
|
*/
|
|
if (tvp == fvp) {
|
|
error = 0;
|
|
goto abortit;
|
|
}
|
|
|
|
error = vn_lock(fvp, LK_EXCLUSIVE, td);
|
|
if (error)
|
|
goto abortit;
|
|
dp = VTODE(fdvp);
|
|
ip = VTODE(fvp);
|
|
|
|
/*
|
|
* Be sure we are not renaming ".", "..", or an alias of ".". This
|
|
* leads to a crippled directory tree. It's pretty tough to do a
|
|
* "ls" or "pwd" with the "." directory entry missing, and "cd .."
|
|
* doesn't work if the ".." entry is missing.
|
|
*/
|
|
if (ip->de_Attributes & ATTR_DIRECTORY) {
|
|
/*
|
|
* Avoid ".", "..", and aliases of "." for obvious reasons.
|
|
*/
|
|
if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
|
|
dp == ip ||
|
|
(fcnp->cn_flags & ISDOTDOT) ||
|
|
(tcnp->cn_flags & ISDOTDOT) ||
|
|
(ip->de_flag & DE_RENAME)) {
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
error = EINVAL;
|
|
goto abortit;
|
|
}
|
|
ip->de_flag |= DE_RENAME;
|
|
doingdirectory++;
|
|
}
|
|
|
|
/*
|
|
* When the target exists, both the directory
|
|
* and target vnodes are returned locked.
|
|
*/
|
|
dp = VTODE(tdvp);
|
|
xp = tvp ? VTODE(tvp) : NULL;
|
|
/*
|
|
* Remember direntry place to use for destination
|
|
*/
|
|
to_diroffset = dp->de_fndoffset;
|
|
to_count = dp->de_fndcnt;
|
|
|
|
/*
|
|
* 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 doscheckpath().
|
|
*/
|
|
error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
|
|
newparent = 1;
|
|
if (doingdirectory && newparent) {
|
|
if (error) /* write access check above */
|
|
goto bad;
|
|
if (xp != NULL)
|
|
vput(tvp);
|
|
/*
|
|
* doscheckpath() vput()'s dp,
|
|
* so we have to do a relookup afterwards
|
|
*/
|
|
error = doscheckpath(ip, dp);
|
|
if (error)
|
|
goto out;
|
|
if ((tcnp->cn_flags & SAVESTART) == 0)
|
|
panic("msdosfs_rename: lost to startdir");
|
|
error = relookup(tdvp, &tvp, tcnp);
|
|
if (error)
|
|
goto out;
|
|
dp = VTODE(tdvp);
|
|
xp = tvp ? VTODE(tvp) : NULL;
|
|
}
|
|
|
|
if (xp != NULL) {
|
|
/*
|
|
* 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->de_Attributes & ATTR_DIRECTORY) {
|
|
if (!dosdirempty(xp)) {
|
|
error = ENOTEMPTY;
|
|
goto bad;
|
|
}
|
|
if (!doingdirectory) {
|
|
error = ENOTDIR;
|
|
goto bad;
|
|
}
|
|
cache_purge(tdvp);
|
|
} else if (doingdirectory) {
|
|
error = EISDIR;
|
|
goto bad;
|
|
}
|
|
error = removede(dp, xp);
|
|
if (error)
|
|
goto bad;
|
|
vput(tvp);
|
|
xp = NULL;
|
|
}
|
|
|
|
/*
|
|
* Convert the filename in tcnp into a dos filename. We copy this
|
|
* into the denode and directory entry for the destination
|
|
* file/directory.
|
|
*/
|
|
error = uniqdosname(VTODE(tdvp), tcnp, toname);
|
|
if (error)
|
|
goto abortit;
|
|
|
|
/*
|
|
* Since from wasn't locked at various places above,
|
|
* have to do a relookup here.
|
|
*/
|
|
fcnp->cn_flags &= ~MODMASK;
|
|
fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
|
|
if ((fcnp->cn_flags & SAVESTART) == 0)
|
|
panic("msdosfs_rename: lost from startdir");
|
|
if (!newparent)
|
|
VOP_UNLOCK(tdvp, 0, td);
|
|
if (relookup(fdvp, &fvp, fcnp) == 0)
|
|
vrele(fdvp);
|
|
if (fvp == NULL) {
|
|
/*
|
|
* From name has disappeared.
|
|
*/
|
|
if (doingdirectory)
|
|
panic("rename: lost dir entry");
|
|
vrele(ap->a_fvp);
|
|
if (newparent)
|
|
VOP_UNLOCK(tdvp, 0, td);
|
|
vrele(tdvp);
|
|
return 0;
|
|
}
|
|
xp = VTODE(fvp);
|
|
zp = VTODE(fdvp);
|
|
from_diroffset = zp->de_fndoffset;
|
|
|
|
/*
|
|
* Ensure that the directory entry still exists and has not
|
|
* changed till now. If the source is a file 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 or renamed; this is
|
|
* prohibited by the DE_RENAME flag.
|
|
*/
|
|
if (xp != ip) {
|
|
if (doingdirectory)
|
|
panic("rename: lost dir entry");
|
|
vrele(ap->a_fvp);
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0, td);
|
|
xp = NULL;
|
|
} else {
|
|
vrele(fvp);
|
|
xp = NULL;
|
|
|
|
/*
|
|
* First write a new entry in the destination
|
|
* directory and mark the entry in the source directory
|
|
* as deleted. Then move the denode to the correct hash
|
|
* chain for its new location in the filesystem. And, if
|
|
* we moved a directory, then update its .. entry to point
|
|
* to the new parent directory.
|
|
*/
|
|
bcopy(ip->de_Name, oldname, 11);
|
|
bcopy(toname, ip->de_Name, 11); /* update denode */
|
|
dp->de_fndoffset = to_diroffset;
|
|
dp->de_fndcnt = to_count;
|
|
error = createde(ip, dp, (struct denode **)0, tcnp);
|
|
if (error) {
|
|
bcopy(oldname, ip->de_Name, 11);
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0, td);
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
goto bad;
|
|
}
|
|
ip->de_refcnt++;
|
|
zp->de_fndoffset = from_diroffset;
|
|
error = removede(zp, ip);
|
|
if (error) {
|
|
/* XXX should really panic here, fs is corrupt */
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0, td);
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
goto bad;
|
|
}
|
|
if (!doingdirectory) {
|
|
error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
|
|
&ip->de_dirclust, 0);
|
|
if (error) {
|
|
/* XXX should really panic here, fs is corrupt */
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0, td);
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
goto bad;
|
|
}
|
|
if (ip->de_dirclust == MSDOSFSROOT)
|
|
ip->de_diroffset = to_diroffset;
|
|
else
|
|
ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
|
|
}
|
|
reinsert(ip);
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0, td);
|
|
}
|
|
|
|
/*
|
|
* If we moved a directory to a new parent directory, then we must
|
|
* fixup the ".." entry in the moved directory.
|
|
*/
|
|
if (doingdirectory && newparent) {
|
|
cn = ip->de_StartCluster;
|
|
if (cn == MSDOSFSROOT) {
|
|
/* this should never happen */
|
|
panic("msdosfs_rename(): updating .. in root directory?");
|
|
} else
|
|
bn = cntobn(pmp, cn);
|
|
error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster,
|
|
NOCRED, &bp);
|
|
if (error) {
|
|
/* XXX should really panic here, fs is corrupt */
|
|
brelse(bp);
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
goto bad;
|
|
}
|
|
dotdotp = (struct direntry *)bp->b_data + 1;
|
|
putushort(dotdotp->deStartCluster, dp->de_StartCluster);
|
|
if (FAT32(pmp))
|
|
putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
|
|
error = bwrite(bp);
|
|
if (error) {
|
|
/* XXX should really panic here, fs is corrupt */
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
VOP_UNLOCK(fvp, 0, td);
|
|
bad:
|
|
if (xp)
|
|
vput(tvp);
|
|
vput(tdvp);
|
|
out:
|
|
ip->de_flag &= ~DE_RENAME;
|
|
vrele(fdvp);
|
|
vrele(fvp);
|
|
return (error);
|
|
|
|
}
|
|
|
|
static struct {
|
|
struct direntry dot;
|
|
struct direntry dotdot;
|
|
} dosdirtemplate = {
|
|
{ ". ", " ", /* the . entry */
|
|
ATTR_DIRECTORY, /* file attribute */
|
|
0, /* reserved */
|
|
0, { 0, 0 }, { 0, 0 }, /* create time & date */
|
|
{ 0, 0 }, /* access date */
|
|
{ 0, 0 }, /* high bits of start cluster */
|
|
{ 210, 4 }, { 210, 4 }, /* modify time & date */
|
|
{ 0, 0 }, /* startcluster */
|
|
{ 0, 0, 0, 0 } /* filesize */
|
|
},
|
|
{ ".. ", " ", /* the .. entry */
|
|
ATTR_DIRECTORY, /* file attribute */
|
|
0, /* reserved */
|
|
0, { 0, 0 }, { 0, 0 }, /* create time & date */
|
|
{ 0, 0 }, /* access date */
|
|
{ 0, 0 }, /* high bits of start cluster */
|
|
{ 210, 4 }, { 210, 4 }, /* modify time & date */
|
|
{ 0, 0 }, /* startcluster */
|
|
{ 0, 0, 0, 0 } /* filesize */
|
|
}
|
|
};
|
|
|
|
static int
|
|
msdosfs_mkdir(ap)
|
|
struct vop_mkdir_args /* {
|
|
struct vnode *a_dvp;
|
|
struvt vnode **a_vpp;
|
|
struvt componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
} */ *ap;
|
|
{
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct denode *dep;
|
|
struct denode *pdep = VTODE(ap->a_dvp);
|
|
struct direntry *denp;
|
|
struct msdosfsmount *pmp = pdep->de_pmp;
|
|
struct buf *bp;
|
|
u_long newcluster, pcl;
|
|
int bn;
|
|
int error;
|
|
struct denode ndirent;
|
|
struct timespec ts;
|
|
|
|
/*
|
|
* If this is the root directory and there is no space left we
|
|
* can't do anything. This is because the root directory can not
|
|
* change size.
|
|
*/
|
|
if (pdep->de_StartCluster == MSDOSFSROOT
|
|
&& pdep->de_fndoffset >= pdep->de_FileSize) {
|
|
error = ENOSPC;
|
|
goto bad2;
|
|
}
|
|
|
|
/*
|
|
* Allocate a cluster to hold the about to be created directory.
|
|
*/
|
|
error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
|
|
if (error)
|
|
goto bad2;
|
|
|
|
bzero(&ndirent, sizeof(ndirent));
|
|
ndirent.de_pmp = pmp;
|
|
ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
|
|
getnanotime(&ts);
|
|
DETIMES(&ndirent, &ts, &ts, &ts);
|
|
|
|
/*
|
|
* Now fill the cluster with the "." and ".." entries. And write
|
|
* the cluster to disk. This way it is there for the parent
|
|
* directory to be pointing at if there were a crash.
|
|
*/
|
|
bn = cntobn(pmp, newcluster);
|
|
/* always succeeds */
|
|
bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0);
|
|
bzero(bp->b_data, pmp->pm_bpcluster);
|
|
bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
|
|
denp = (struct direntry *)bp->b_data;
|
|
putushort(denp[0].deStartCluster, newcluster);
|
|
putushort(denp[0].deCDate, ndirent.de_CDate);
|
|
putushort(denp[0].deCTime, ndirent.de_CTime);
|
|
denp[0].deCHundredth = ndirent.de_CHun;
|
|
putushort(denp[0].deADate, ndirent.de_ADate);
|
|
putushort(denp[0].deMDate, ndirent.de_MDate);
|
|
putushort(denp[0].deMTime, ndirent.de_MTime);
|
|
pcl = pdep->de_StartCluster;
|
|
if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
|
|
pcl = 0;
|
|
putushort(denp[1].deStartCluster, pcl);
|
|
putushort(denp[1].deCDate, ndirent.de_CDate);
|
|
putushort(denp[1].deCTime, ndirent.de_CTime);
|
|
denp[1].deCHundredth = ndirent.de_CHun;
|
|
putushort(denp[1].deADate, ndirent.de_ADate);
|
|
putushort(denp[1].deMDate, ndirent.de_MDate);
|
|
putushort(denp[1].deMTime, ndirent.de_MTime);
|
|
if (FAT32(pmp)) {
|
|
putushort(denp[0].deHighClust, newcluster >> 16);
|
|
putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
|
|
}
|
|
|
|
error = bwrite(bp);
|
|
if (error)
|
|
goto bad;
|
|
|
|
/*
|
|
* Now build up a directory entry pointing to the newly allocated
|
|
* cluster. This will be written to an empty slot in the parent
|
|
* directory.
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if ((cnp->cn_flags & HASBUF) == 0)
|
|
panic("msdosfs_mkdir: no name");
|
|
#endif
|
|
error = uniqdosname(pdep, cnp, ndirent.de_Name);
|
|
if (error)
|
|
goto bad;
|
|
|
|
ndirent.de_Attributes = ATTR_DIRECTORY;
|
|
ndirent.de_LowerCase = 0;
|
|
ndirent.de_StartCluster = newcluster;
|
|
ndirent.de_FileSize = 0;
|
|
ndirent.de_dev = pdep->de_dev;
|
|
ndirent.de_devvp = pdep->de_devvp;
|
|
error = createde(&ndirent, pdep, &dep, cnp);
|
|
if (error)
|
|
goto bad;
|
|
*ap->a_vpp = DETOV(dep);
|
|
return (0);
|
|
|
|
bad:
|
|
clusterfree(pmp, newcluster, NULL);
|
|
bad2:
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
msdosfs_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 denode *ip, *dp;
|
|
struct thread *td = cnp->cn_thread;
|
|
int error;
|
|
|
|
ip = VTODE(vp);
|
|
dp = VTODE(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 (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
|
|
error = ENOTEMPTY;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Delete the entry from the directory. For dos filesystems this
|
|
* gets rid of the directory entry on disk, the in memory copy
|
|
* still exists but the de_refcnt is <= 0. This prevents it from
|
|
* being found by deget(). When the vput() on dep is done we give
|
|
* up access and eventually msdosfs_reclaim() will be called which
|
|
* will remove it from the denode cache.
|
|
*/
|
|
error = removede(dp, ip);
|
|
if (error)
|
|
goto out;
|
|
/*
|
|
* This is where we decrement the link count in the parent
|
|
* directory. Since dos filesystems don't do this we just purge
|
|
* the name cache.
|
|
*/
|
|
cache_purge(dvp);
|
|
VOP_UNLOCK(dvp, 0, td);
|
|
/*
|
|
* Truncate the directory that is being deleted.
|
|
*/
|
|
error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, td);
|
|
cache_purge(vp);
|
|
|
|
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
out:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* DOS filesystems don't know what symlinks are.
|
|
*/
|
|
static int
|
|
msdosfs_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;
|
|
{
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
msdosfs_readdir(ap)
|
|
struct vop_readdir_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
int *a_eofflag;
|
|
int *a_ncookies;
|
|
u_long **a_cookies;
|
|
} */ *ap;
|
|
{
|
|
int error = 0;
|
|
int diff;
|
|
long n;
|
|
int blsize;
|
|
long on;
|
|
u_long cn;
|
|
u_long fileno;
|
|
u_long dirsperblk;
|
|
long bias = 0;
|
|
daddr_t bn, lbn;
|
|
struct buf *bp;
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct direntry *dentp;
|
|
struct dirent dirbuf;
|
|
struct uio *uio = ap->a_uio;
|
|
u_long *cookies = NULL;
|
|
int ncookies = 0;
|
|
off_t offset, off;
|
|
int chksum = -1;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
|
|
ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
|
|
#endif
|
|
|
|
/*
|
|
* msdosfs_readdir() won't operate properly on regular files since
|
|
* it does i/o only with the the filesystem vnode, and hence can
|
|
* retrieve the wrong block from the buffer cache for a plain file.
|
|
* So, fail attempts to readdir() on a plain file.
|
|
*/
|
|
if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
|
|
return (ENOTDIR);
|
|
|
|
/*
|
|
* To be safe, initialize dirbuf
|
|
*/
|
|
bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
|
|
|
|
/*
|
|
* If the user buffer is smaller than the size of one dos directory
|
|
* entry or the file offset is not a multiple of the size of a
|
|
* directory entry, then we fail the read.
|
|
*/
|
|
off = offset = uio->uio_offset;
|
|
if (uio->uio_resid < sizeof(struct direntry) ||
|
|
(offset & (sizeof(struct direntry) - 1)))
|
|
return (EINVAL);
|
|
|
|
if (ap->a_ncookies) {
|
|
ncookies = uio->uio_resid / 16;
|
|
MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
|
|
M_WAITOK);
|
|
*ap->a_cookies = cookies;
|
|
*ap->a_ncookies = ncookies;
|
|
}
|
|
|
|
dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
|
|
|
|
/*
|
|
* If they are reading from the root directory then, we simulate
|
|
* the . and .. entries since these don't exist in the root
|
|
* directory. We also set the offset bias to make up for having to
|
|
* simulate these entries. By this I mean that at file offset 64 we
|
|
* read the first entry in the root directory that lives on disk.
|
|
*/
|
|
if (dep->de_StartCluster == MSDOSFSROOT
|
|
|| (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
|
|
#if 0
|
|
printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
|
|
offset);
|
|
#endif
|
|
bias = 2 * sizeof(struct direntry);
|
|
if (offset < bias) {
|
|
for (n = (int)offset / sizeof(struct direntry);
|
|
n < 2; n++) {
|
|
if (FAT32(pmp))
|
|
dirbuf.d_fileno = cntobn(pmp,
|
|
pmp->pm_rootdirblk)
|
|
* dirsperblk;
|
|
else
|
|
dirbuf.d_fileno = 1;
|
|
dirbuf.d_type = DT_DIR;
|
|
switch (n) {
|
|
case 0:
|
|
dirbuf.d_namlen = 1;
|
|
strcpy(dirbuf.d_name, ".");
|
|
break;
|
|
case 1:
|
|
dirbuf.d_namlen = 2;
|
|
strcpy(dirbuf.d_name, "..");
|
|
break;
|
|
}
|
|
dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
|
|
if (uio->uio_resid < dirbuf.d_reclen)
|
|
goto out;
|
|
error = uiomove(&dirbuf, dirbuf.d_reclen, uio);
|
|
if (error)
|
|
goto out;
|
|
offset += sizeof(struct direntry);
|
|
off = offset;
|
|
if (cookies) {
|
|
*cookies++ = offset;
|
|
if (--ncookies <= 0)
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mbnambuf_init();
|
|
off = offset;
|
|
while (uio->uio_resid > 0) {
|
|
lbn = de_cluster(pmp, offset - bias);
|
|
on = (offset - bias) & pmp->pm_crbomask;
|
|
n = min(pmp->pm_bpcluster - on, uio->uio_resid);
|
|
diff = dep->de_FileSize - (offset - bias);
|
|
if (diff <= 0)
|
|
break;
|
|
n = min(n, diff);
|
|
error = pcbmap(dep, lbn, &bn, &cn, &blsize);
|
|
if (error)
|
|
break;
|
|
error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
n = min(n, blsize - bp->b_resid);
|
|
if (n == 0) {
|
|
brelse(bp);
|
|
return (EIO);
|
|
}
|
|
|
|
/*
|
|
* Convert from dos directory entries to fs-independent
|
|
* directory entries.
|
|
*/
|
|
for (dentp = (struct direntry *)(bp->b_data + on);
|
|
(char *)dentp < bp->b_data + on + n;
|
|
dentp++, offset += sizeof(struct direntry)) {
|
|
#if 0
|
|
printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
|
|
dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
|
|
#endif
|
|
/*
|
|
* If this is an unused entry, we can stop.
|
|
*/
|
|
if (dentp->deName[0] == SLOT_EMPTY) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Skip deleted entries.
|
|
*/
|
|
if (dentp->deName[0] == SLOT_DELETED) {
|
|
chksum = -1;
|
|
mbnambuf_init();
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Handle Win95 long directory entries
|
|
*/
|
|
if (dentp->deAttributes == ATTR_WIN95) {
|
|
if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
|
|
continue;
|
|
chksum = win2unixfn((struct winentry *)dentp,
|
|
chksum, pmp);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Skip volume labels
|
|
*/
|
|
if (dentp->deAttributes & ATTR_VOLUME) {
|
|
chksum = -1;
|
|
mbnambuf_init();
|
|
continue;
|
|
}
|
|
/*
|
|
* This computation of d_fileno must match
|
|
* the computation of va_fileid in
|
|
* msdosfs_getattr.
|
|
*/
|
|
if (dentp->deAttributes & ATTR_DIRECTORY) {
|
|
fileno = getushort(dentp->deStartCluster);
|
|
if (FAT32(pmp))
|
|
fileno |= getushort(dentp->deHighClust) << 16;
|
|
/* if this is the root directory */
|
|
if (fileno == MSDOSFSROOT)
|
|
if (FAT32(pmp))
|
|
fileno = cntobn(pmp,
|
|
pmp->pm_rootdirblk)
|
|
* dirsperblk;
|
|
else
|
|
fileno = 1;
|
|
else
|
|
fileno = cntobn(pmp, fileno) * dirsperblk;
|
|
dirbuf.d_fileno = fileno;
|
|
dirbuf.d_type = DT_DIR;
|
|
} else {
|
|
dirbuf.d_fileno = offset / sizeof(struct direntry);
|
|
dirbuf.d_type = DT_REG;
|
|
}
|
|
if (chksum != winChksum(dentp->deName)) {
|
|
dirbuf.d_namlen = dos2unixfn(dentp->deName,
|
|
(u_char *)dirbuf.d_name,
|
|
dentp->deLowerCase |
|
|
((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
|
|
(LCASE_BASE | LCASE_EXT) : 0),
|
|
pmp);
|
|
mbnambuf_init();
|
|
} else
|
|
mbnambuf_flush(&dirbuf);
|
|
chksum = -1;
|
|
dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
|
|
if (uio->uio_resid < dirbuf.d_reclen) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
error = uiomove(&dirbuf, dirbuf.d_reclen, uio);
|
|
if (error) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
if (cookies) {
|
|
*cookies++ = offset + sizeof(struct direntry);
|
|
if (--ncookies <= 0) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
}
|
|
off = offset + sizeof(struct direntry);
|
|
}
|
|
brelse(bp);
|
|
}
|
|
out:
|
|
/* Subtract unused cookies */
|
|
if (ap->a_ncookies)
|
|
*ap->a_ncookies -= ncookies;
|
|
|
|
uio->uio_offset = off;
|
|
|
|
/*
|
|
* Set the eofflag (NFS uses it)
|
|
*/
|
|
if (ap->a_eofflag) {
|
|
if (dep->de_FileSize - (offset - bias) <= 0)
|
|
*ap->a_eofflag = 1;
|
|
else
|
|
*ap->a_eofflag = 0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* vp - address of vnode file the file
|
|
* bn - which cluster we are interested in mapping to a filesystem block number.
|
|
* vpp - returns the vnode for the block special file holding the filesystem
|
|
* containing the file of interest
|
|
* bnp - address of where to return the filesystem relative block number
|
|
*/
|
|
static int
|
|
msdosfs_bmap(ap)
|
|
struct vop_bmap_args /* {
|
|
struct vnode *a_vp;
|
|
daddr_t a_bn;
|
|
struct vnode **a_vpp;
|
|
daddr_t *a_bnp;
|
|
int *a_runp;
|
|
int *a_runb;
|
|
} */ *ap;
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
daddr_t blkno;
|
|
int error;
|
|
|
|
if (ap->a_vpp != NULL)
|
|
*ap->a_vpp = dep->de_devvp;
|
|
if (ap->a_bnp == NULL)
|
|
return (0);
|
|
if (ap->a_runp) {
|
|
/*
|
|
* Sequential clusters should be counted here.
|
|
*/
|
|
*ap->a_runp = 0;
|
|
}
|
|
if (ap->a_runb) {
|
|
*ap->a_runb = 0;
|
|
}
|
|
error = pcbmap(dep, ap->a_bn, &blkno, 0, 0);
|
|
*ap->a_bnp = blkno;
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
msdosfs_strategy(ap)
|
|
struct vop_strategy_args /* {
|
|
struct vnode *a_vp;
|
|
struct buf *a_bp;
|
|
} */ *ap;
|
|
{
|
|
struct buf *bp = ap->a_bp;
|
|
struct denode *dep = VTODE(bp->b_vp);
|
|
struct vnode *vp;
|
|
int error = 0;
|
|
daddr_t blkno;
|
|
|
|
KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)",
|
|
__func__, ap->a_vp, ap->a_bp->b_vp));
|
|
if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
|
|
panic("msdosfs_strategy: spec");
|
|
/*
|
|
* If we don't already know the filesystem relative block number
|
|
* then get it using pcbmap(). If pcbmap() returns the block
|
|
* number as -1 then we've got a hole in the file. DOS filesystems
|
|
* don't allow files with holes, so we shouldn't ever see this.
|
|
*/
|
|
if (bp->b_blkno == bp->b_lblkno) {
|
|
error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0);
|
|
bp->b_blkno = blkno;
|
|
if (error) {
|
|
bp->b_error = error;
|
|
bp->b_ioflags |= BIO_ERROR;
|
|
bufdone(bp);
|
|
return (error);
|
|
}
|
|
if ((long)bp->b_blkno == -1)
|
|
vfs_bio_clrbuf(bp);
|
|
}
|
|
if (bp->b_blkno == -1) {
|
|
bufdone(bp);
|
|
return (0);
|
|
}
|
|
/*
|
|
* Read/write the block from/to the disk that contains the desired
|
|
* file block.
|
|
*/
|
|
vp = dep->de_devvp;
|
|
bp->b_dev = vp->v_rdev;
|
|
bp->b_iooffset = dbtob(bp->b_blkno);
|
|
VOP_SPECSTRATEGY(vp, bp);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
msdosfs_print(ap)
|
|
struct vop_print_args /* {
|
|
struct vnode *vp;
|
|
} */ *ap;
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
|
|
printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ",
|
|
dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
|
|
printf("on dev (%d, %d)\n", major(dep->de_dev), minor(dep->de_dev));
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
msdosfs_pathconf(ap)
|
|
struct vop_pathconf_args /* {
|
|
struct vnode *a_vp;
|
|
int a_name;
|
|
int *a_retval;
|
|
} */ *ap;
|
|
{
|
|
struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
|
|
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_NAME_MAX:
|
|
*ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
|
|
return (0);
|
|
case _PC_PATH_MAX:
|
|
*ap->a_retval = PATH_MAX;
|
|
return (0);
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_NO_TRUNC:
|
|
*ap->a_retval = 0;
|
|
return (0);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static int
|
|
msdosfs_advlock(ap)
|
|
struct vop_advlock_args /* {
|
|
struct vnode *a_vp;
|
|
u_char a_id;
|
|
int a_op;
|
|
struct flock *a_fl;
|
|
int a_flags;
|
|
} */ *ap;
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
|
|
return (lf_advlock(ap, &dep->de_lockf, dep->de_FileSize));
|
|
}
|
|
|
|
/* Global vfs data structures for msdosfs */
|
|
vop_t **msdosfs_vnodeop_p;
|
|
static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *) vop_defaultop },
|
|
{ &vop_access_desc, (vop_t *) msdosfs_access },
|
|
{ &vop_advlock_desc, (vop_t *) msdosfs_advlock },
|
|
{ &vop_bmap_desc, (vop_t *) msdosfs_bmap },
|
|
{ &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup },
|
|
{ &vop_close_desc, (vop_t *) msdosfs_close },
|
|
{ &vop_create_desc, (vop_t *) msdosfs_create },
|
|
{ &vop_fsync_desc, (vop_t *) msdosfs_fsync },
|
|
{ &vop_getattr_desc, (vop_t *) msdosfs_getattr },
|
|
{ &vop_inactive_desc, (vop_t *) msdosfs_inactive },
|
|
{ &vop_link_desc, (vop_t *) msdosfs_link },
|
|
{ &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
|
|
{ &vop_mkdir_desc, (vop_t *) msdosfs_mkdir },
|
|
{ &vop_mknod_desc, (vop_t *) msdosfs_mknod },
|
|
{ &vop_pathconf_desc, (vop_t *) msdosfs_pathconf },
|
|
{ &vop_print_desc, (vop_t *) msdosfs_print },
|
|
{ &vop_read_desc, (vop_t *) msdosfs_read },
|
|
{ &vop_readdir_desc, (vop_t *) msdosfs_readdir },
|
|
{ &vop_reclaim_desc, (vop_t *) msdosfs_reclaim },
|
|
{ &vop_remove_desc, (vop_t *) msdosfs_remove },
|
|
{ &vop_rename_desc, (vop_t *) msdosfs_rename },
|
|
{ &vop_rmdir_desc, (vop_t *) msdosfs_rmdir },
|
|
{ &vop_setattr_desc, (vop_t *) msdosfs_setattr },
|
|
{ &vop_strategy_desc, (vop_t *) msdosfs_strategy },
|
|
{ &vop_symlink_desc, (vop_t *) msdosfs_symlink },
|
|
{ &vop_write_desc, (vop_t *) msdosfs_write },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
|
|
{ &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
|
|
|
|
VNODEOP_SET(msdosfs_vnodeop_opv_desc);
|