File: [Development] / xfs-linux-nodel / linux-2.6 / xfs_ioctl.c (download)
Revision 1.47, Thu Aug 16 20:34:51 2001 UTC (16 years, 2 months ago) by eric
Branch: MAIN
Changes since 1.46: +2 -28
lines
"Merge" of irix6.5f:irix:100627b
Move freeze/thaw ioctls out of case statements into functions
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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include <xfs.h>
#include <xfs_fsops.h>
#include <xfs_dfrag.h>
#include <linux/xfs_iops.h>
#include <linux/locks.h>
#include <linux/smp_lock.h>
#include <linux/dcache.h>
/*
* The "open_by_handle() & readlink_by_handle() ioctl's
* require 'root', or 'SysAdmin' capabilies.
* To change to a simple 'permission' test,
* uncomment the following #define.
*/
/* #define PERMISSIONS_BY_USER */
int
xfs_getattr(
bhv_desc_t *bdp,
vattr_t *vap,
int flags,
cred_t *credp);
int
xfs_setattr(
bhv_desc_t *bdp,
vattr_t *vap,
int flags,
cred_t *credp);
int
xfs_set_dmattrs (
bhv_desc_t *bdp,
u_int evmask,
u_int16_t state,
cred_t *credp);
int
xfs_get_uiosize(
xfs_mount_t *mp,
xfs_inode_t *ip,
struct biosize *bs,
cred_t *credp);
int
xfs_set_uiosize(
xfs_mount_t *mp,
xfs_inode_t *ip,
uint flags,
int read_iosizelog,
int write_iosizelog,
cred_t *credp);
int
xfs_change_file_space(
bhv_desc_t *bdp,
int cmd,
xfs_flock64_t *bf,
xfs_off_t offset,
cred_t *credp,
int attr_flags);
/*
* xfs_find_handle: map from userspace xfs_fsop_handlereq structure to
* a file or fs handle - used for XFS_IOC_PATH_TO_FSHANDLE,
* XFS_IOC_PATH_TO_HANDLE and XFS_IOC_FD_TO_HANDLE.
*/
int
xfs_find_handle(
unsigned int cmd,
unsigned long arg)
{
int hsize;
xfs_handle_t handle;
xfs_fsop_handlereq_t hreq;
struct inode *inode;
struct vnode *vp;
int only_fsid;
/* read handle request from user */
if (copy_from_user(&hreq, (struct xfs_fsop_handlereq *)arg,
sizeof(struct xfs_fsop_handlereq)))
return -XFS_ERROR(EFAULT);
/* zero our handle */
bzero((char *)&handle, sizeof(handle));
/* now we need the inode in question */
only_fsid=0;
switch (cmd) {
case XFS_IOC_PATH_TO_FSHANDLE:
only_fsid=1;
/* fallthrough */
case XFS_IOC_PATH_TO_HANDLE: {
struct nameidata nd;
char *path;
int error;
/* we need the path */
path = getname(hreq.path);
if (IS_ERR(path))
return PTR_ERR(path);
/* traverse the path */
error = 0;
if (path_init(path, LOOKUP_POSITIVE, &nd))
error = path_walk(path, &nd);
putname(path);
if (error)
return error;
ASSERT(nd.dentry);
ASSERT(nd.dentry->d_inode);
inode = igrab(nd.dentry->d_inode);
path_release(&nd);
break;
}
case XFS_IOC_FD_TO_HANDLE: {
struct file * file;
file = fget(hreq.fd);
if (!file)
return -EBADF;
ASSERT(file->f_dentry);
ASSERT(file->f_dentry->d_inode);
inode = igrab(file->f_dentry->d_inode);
fput(file);
break;
}
default:
ASSERT(0);
return -XFS_ERROR(EINVAL);
}
/* we need the vnode */
vp = LINVFS_GET_VP(inode);
if (!vp || !vp->v_vfsp->vfs_altfsid) {
/* we're not in XFS anymore, Toto */
iput(inode);
return -XFS_ERROR(EINVAL);
}
if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
iput(inode);
return -XFS_ERROR(EBADF);
}
/* now we can grab the fsid */
memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t));
hsize = sizeof(xfs_fsid_t);
if (!only_fsid) {
xfs_inode_t *ip;
bhv_desc_t *bhv;
int lock_mode;
/* we need to get access to the xfs_inode to read the generation */
VN_BHV_READ_LOCK(&(vp)->v_bh);
bhv = VNODE_TO_FIRST_BHV(vp);
ASSERT(bhv);
ip = XFS_BHVTOI(bhv);
ASSERT(ip);
lock_mode = xfs_ilock_map_shared(ip);
/* fill in fid section of handle from inode */
handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) -
sizeof(handle.ha_fid.xfs_fid_len);
handle.ha_fid.xfs_fid_pad = 0;
handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen;
handle.ha_fid.xfs_fid_ino = ip->i_ino;
xfs_iunlock_map_shared(ip, lock_mode);
VN_BHV_READ_UNLOCK(&(vp)->v_bh);
hsize = XFS_HSIZE(handle);
}
/* now copy our handle into the user buffer & write out the size */
if (copy_to_user((xfs_handle_t *)hreq.ohandle, &handle, hsize) ||
copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
iput(inode);
return -XFS_ERROR(EFAULT);
}
iput(inode);
return 0;
}
int
xfs_open_by_handle(
unsigned int cmd,
unsigned long arg,
struct file *parfilp,
struct inode *parinode,
vfs_t *vfsp,
xfs_mount_t *mp)
{
int error;
int new_fd;
int permflag;
__u32 igen;
struct dentry *dentry = NULL;
struct file *filp = NULL;
struct inode *inode = NULL;
struct list_head *lp;
void *hanp;
size_t hlen;
ino_t ino;
xfs_fid_t *xfid;
xfs_handle_t *handlep;
xfs_handle_t handle;
xfs_fsop_handlereq_t hreq;
xfs_inode_t *ip;
vnode_t *vp;
#ifndef PERMISSIONS_BY_USER
/*
* Only allow Sys Admin capable users.
*/
if (! capable(CAP_SYS_ADMIN))
return -EPERM;
#endif /* ! PERMISSIONS_BY_USER */
/*
* Only allow handle opens under a directory.
*/
if ( !S_ISDIR(parinode->i_mode) )
return -ENOTDIR;
/*
* Copy the handle down from the user and validate
* that it looks to be in the correct format.
*/
if (copy_from_user(&hreq, (struct xfs_fsop_handlereq *)arg,
sizeof(struct xfs_fsop_handlereq)))
return -XFS_ERROR(EFAULT);
hanp = hreq.ihandle;
hlen = hreq.ihandlen;
handlep = &handle;
/*
* gethandle(hanp, hlen, &handle)
*/
if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
return -XFS_ERROR(EINVAL);
if (copy_from_user(handlep, hanp, hlen))
return -XFS_ERROR(EFAULT);
if (hlen < sizeof(*handlep))
bzero(((char *)handlep) + hlen,
sizeof(*handlep) - hlen);
if (hlen > sizeof(handlep->ha_fsid)) {
if ( handlep->ha_fid.xfs_fid_len !=
(hlen - sizeof(handlep->ha_fsid)
- sizeof(handlep->ha_fid.xfs_fid_len))
|| handlep->ha_fid.xfs_fid_pad) {
return -XFS_ERROR(EINVAL);
}
}
/*
* Crack the handle, obtain the inode # & generation #
*/
xfid = (struct xfs_fid *)&handlep->ha_fid;
if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
ino = xfid->xfs_fid_ino;
igen = xfid->xfs_fid_gen;
} else {
/*
* Invalid. Since handles can be created in user
* space and passed in, this is not cause for a panic.
*/
return -XFS_ERROR(EINVAL);
}
/*
* Get the XFS inode, building a vnode to go with it.
*/
error = xfs_iget(mp, NULL, ino, XFS_ILOCK_SHARED, &ip, 0);
if (error)
return -error;
if (ip == NULL)
return -XFS_ERROR(EIO);
if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
xfs_iput(ip, XFS_ILOCK_SHARED);
return -XFS_ERROR(ENOENT);
}
vp = XFS_ITOV(ip);
inode = LINVFS_GET_IP(vp);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
linvfs_set_inode_ops(inode);
error = linvfs_revalidate_core(inode, ATTR_COMM);
if (error) {
iput(inode);
return -XFS_ERROR(error);
}
/*
* Restrict handle operations to directories & regular files.
*/
if (! (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) ) {
iput(inode);
return -XFS_ERROR(EINVAL);
}
/*
* Put open permission in namei format.
*/
permflag = hreq.oflags;
if ((permflag+1) & O_ACCMODE)
permflag++;
if (permflag & O_TRUNC)
permflag |= 2;
/*
* Can't write directories.
*/
if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
iput(inode);
return -XFS_ERROR(EISDIR);
}
/*
* Create new_fd
*/
if ((new_fd = get_unused_fd()) < 0) {
iput(inode);
return new_fd;
}
/* now to find a dentry.
* If possible, get a well-connected one
*/
spin_lock(&dcache_lock);
for (lp = inode->i_dentry.next; lp != &inode->i_dentry ; lp=lp->next) {
dentry = list_entry(lp,struct dentry, d_alias);
if (! (dentry->d_flags & DCACHE_NFSD_DISCONNECTED)) {
dget_locked(dentry);
dentry->d_vfs_flags |= DCACHE_REFERENCED;
spin_unlock(&dcache_lock);
iput(inode);
goto found;
}
}
spin_unlock(&dcache_lock);
/*
* ELSE didn't find dentry Create anonymous dcache entry.
*/
dentry = d_alloc_root(inode);
if (dentry == NULL) {
iput(inode);
put_unused_fd(new_fd);
return -XFS_ERROR(ENOMEM);
}
/*
* Keep nfsd happy.
*/
dentry->d_flags |= DCACHE_NFSD_DISCONNECTED;
found:
/*
* Make sure umount returns an EBUSY on umounts while this file is open.
*/
mntget(parfilp->f_vfsmnt);
/*
* Create file pointer.
*/
filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags);
if (IS_ERR(filp)) {
dput(dentry);
put_unused_fd(new_fd);
return -XFS_ERROR(-PTR_ERR(filp));
}
#ifdef PERMISSIONS_BY_USER
/*
* Do permission/write checks
*/
permflag = 0;
if (filp->f_mode & FMODE_READ)
permflag |= MAY_READ;
if (filp->f_mode & FMODE_WRITE)
permflag |= MAY_WRITE;
if (error = permission(inode, permflag)) {
put_unused_fd(new_fd);
fput(filp);
return -XFS_ERROR(-error);
}
#endif /* PERMISSIONS_BY_USER */
fd_install(new_fd, filp);
return new_fd;
}
int
xfs_readlink_by_handle(
unsigned int cmd,
unsigned long arg,
struct file *parfilp,
struct inode *parinode,
vfs_t *vfsp,
xfs_mount_t *mp)
{
int error;
int rlsize;
__u32 igen;
struct iovec aiov;
struct uio auio;
void *hanp;
size_t hlen;
vnode_t *vp = NULL;
struct inode *inode = NULL;
xfs_fid_t *xfid;
xfs_handle_t *handlep;
xfs_handle_t handle;
xfs_ino_t ino;
xfs_inode_t *ip = NULL;
xfs_fsop_handlereq_t hreq;
__u32 olen;
#ifndef PERMISSIONS_BY_USER
/*
* Only allow Sys Admin capable users.
*/
if (! capable(CAP_SYS_ADMIN))
return -EPERM;
#endif /* ! PERMISSIONS_BY_USER */
/*
* Only allow handle opens under a directory.
*/
if ( !S_ISDIR(parinode->i_mode) )
return -ENOTDIR;
/*
* Copy the handle down from the user and validate
* that it looks to be in the correct format.
*/
if (copy_from_user(&hreq, (struct xfs_fsop_handlereq *)arg,
sizeof(struct xfs_fsop_handlereq)))
return -XFS_ERROR(EFAULT);
hanp = hreq.ihandle;
hlen = hreq.ihandlen;
handlep = &handle;
/*
* gethandle(hanp, hlen, &handle)
*/
if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
return -XFS_ERROR(EINVAL);
if (copy_from_user(handlep, hanp, hlen))
return -XFS_ERROR(EFAULT);
if (hlen < sizeof(*handlep))
bzero(((char *)handlep) + hlen,
sizeof(*handlep) - hlen);
if (hlen > sizeof(handlep->ha_fsid)) {
if ( handlep->ha_fid.xfs_fid_len !=
(hlen - sizeof(handlep->ha_fsid)
- sizeof(handlep->ha_fid.xfs_fid_len))
|| handlep->ha_fid.xfs_fid_pad) {
return -XFS_ERROR(EINVAL);
}
}
/*
* Crack the handle, obtain the inode # & generation #
*/
/*
* handle_to_vp(&handle)
* VFS_VGET (vfsp, &vp, &handlep->ha_fid, error)
* bdp, **vp, fidp;
*/
xfid = (struct xfs_fid *)&handlep->ha_fid;
if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
ino = xfid->xfs_fid_ino;
igen = xfid->xfs_fid_gen;
} else {
/*
* Invalid. Since handles can be created in user
* space and passed in via gethandle(), this is not
* cause for a panic.
*/
return -XFS_ERROR(EINVAL);
}
/*
* Get the XFS inode, building a vnode to go with it.
*/
error = xfs_iget(mp, NULL, ino, XFS_ILOCK_SHARED, &ip, 0);
if (error)
return -error;
if (ip == NULL)
return -XFS_ERROR(EIO);
if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
xfs_iput(ip, XFS_ILOCK_SHARED);
return -XFS_ERROR(ENOENT);
}
vp = XFS_ITOV(ip);
inode = LINVFS_GET_IP(vp);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
linvfs_set_inode_ops(inode);
error = linvfs_revalidate_core(inode, ATTR_COMM);
if (error) {
iput(inode);
return -XFS_ERROR(error);
}
/*
* Restrict handle operations to symlinks.
*/
if (vp->v_type != VLNK) {
VN_RELE(vp);
return -XFS_ERROR(EINVAL);
}
aiov.iov_base = hreq.ohandle;
if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))){
VN_RELE(vp);
return -XFS_ERROR(EFAULT);
}
aiov.iov_len = olen;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_fmode = FINVIS;
auio.uio_offset = 0;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_resid = olen;
VOP_READLINK(vp, &auio, get_current_cred(), error);
VN_RELE(vp);
rlsize = olen - auio.uio_resid;
return rlsize;
}
int
xfs_fssetdm_by_handle(
unsigned int cmd,
unsigned long arg,
struct file *parfilp,
struct inode *parinode,
vfs_t *vfsp,
xfs_mount_t *mp)
{
struct inode *inode = NULL;
vnode_t *vp = NULL;
xfs_inode_t *ip = NULL;
int error;
xfs_ino_t ino;
__u32 igen;
xfs_fid_t *xfid;
xfs_handle_t *handlep;
xfs_handle_t handle;
void *hanp;
size_t hlen;
xfs_fsop_setdm_handlereq_t dmhreq;
struct fsdmidata fsd;
dm_fcntl_t dmfcntl;
bhv_desc_t *bdp;
if (! capable(CAP_MKNOD))
return -EPERM;
/*
* Copy the handle down from the user and validate
* that it looks to be in the correct format.
*/
if (copy_from_user(&dmhreq, (struct xfs_fsop_setdm_handlereq *)arg,
sizeof(struct xfs_fsop_setdm_handlereq)))
return -XFS_ERROR(EFAULT);
hanp = dmhreq.hreq.ihandle;
hlen = dmhreq.hreq.ihandlen;
handlep = &handle;
/*
* gethandle(hanp, hlen, &handle)
*/
if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
return -XFS_ERROR(EINVAL);
if (copy_from_user(handlep, hanp, hlen))
return -XFS_ERROR(EFAULT);
if (hlen < sizeof(*handlep))
bzero(((char *)handlep) + hlen,
sizeof(*handlep) - hlen);
if (hlen > sizeof(handlep->ha_fsid)) {
if ( handlep->ha_fid.xfs_fid_len !=
(hlen - sizeof(handlep->ha_fsid)
- sizeof(handlep->ha_fid.xfs_fid_len))
|| handlep->ha_fid.xfs_fid_pad) {
return -XFS_ERROR(EINVAL);
}
}
/*
* Crack the handle, obtain the inode # & generation #
*/
/*
* handle_to_vp(&handle)
* VFS_VGET (vfsp, &vp, &handlep->ha_fid, error)
* bdp, **vp, fidp;
*/
xfid = (struct xfs_fid *)&handlep->ha_fid;
if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
ino = xfid->xfs_fid_ino;
igen = xfid->xfs_fid_gen;
} else {
/*
* Invalid. Since handles can be created in user
* space and passed in via gethandle(), this is not
* cause for a panic.
*/
return -XFS_ERROR(EINVAL);
}
/*
* Get the XFS inode, building a vnode to go with it.
*/
error = xfs_iget(mp, NULL, ino, XFS_ILOCK_SHARED, &ip, 0);
if (error)
return -error;
if (ip == NULL)
return -XFS_ERROR(EIO);
if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
xfs_iput(ip, XFS_ILOCK_SHARED);
return -XFS_ERROR(ENOENT);
}
vp = XFS_ITOV(ip);
inode = LINVFS_GET_IP(vp);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
linvfs_set_inode_ops(inode);
error = linvfs_revalidate_core(inode, ATTR_COMM);
if (error) {
iput(inode);
return -XFS_ERROR(error);
}
/* copy in the 'struct fsdmidata' */
if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))){
iput(inode);
return -XFS_ERROR(EFAULT);
}
dmfcntl.dmfc_subfunc = DM_FCNTL_FSSETDM;
dmfcntl.u_fcntl.setdmrq.fsd_dmevmask = fsd.fsd_dmevmask;
dmfcntl.u_fcntl.setdmrq.fsd_dmstate = fsd.fsd_dmstate;
bdp = bhv_base_unlocked(VN_BHV_HEAD(vp));
error = xfs_dm_fcntl(bdp, &dmfcntl, 0, 0, get_current_cred(), NULL);
VN_RELE(vp);
return error;
}
int
xfs_attrctl_by_handle(
unsigned int cmd,
unsigned long arg,
struct file *parfilp,
struct inode *parinode,
vfs_t *vfsp,
xfs_mount_t *mp)
{
#ifdef CONFIG_HAVE_ATTRCTL
int error;
xfs_fsop_attr_handlereq_t attr_hreq;
xfs_fsop_handlereq_t hreq;
attr_op_t *ops;
void *hanp;
size_t hlen;
xfs_handle_t handle;
xfs_handle_t *handlep;
xfs_fid_t *xfid;
xfs_ino_t xinode;
xfs_inode_t *xip = NULL;
__u32 xigen;
vnode_t *vp = NULL;
struct inode *inode = NULL;
#ifndef PERMISSIONS_BY_USER
/*
* Only allow Sys Admin capable users.
*/
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
#endif /* !PERMISSIONS_BY_USER */
/*
* Only allow handle opens under a directory.
*/
if (!S_ISDIR(parinode->i_mode))
return -ENOTDIR;
/*
* Copy the compound attribute/handle structure down.
*/
if (copy_from_user(&attr_hreq, (struct xfs_fsop_attr_handlereq *)arg,
sizeof(struct xfs_fsop_attr_handlereq)))
return -XFS_ERROR(EFAULT);
/*
* Now copy the handle down from the user and validate
* that it looks to be in the correct format.
*/
if (copy_from_user(&hreq, (struct xfs_fsop_handlereq *)attr_hreq.hreq,
sizeof(struct xfs_fsop_handlereq)))
return -XFS_ERROR(EFAULT);
if (!attr_hreq.ops)
return -XFS_ERROR(EINVAL);
hanp = hreq.ihandle;
hlen = hreq.ihandlen;
handlep = &handle;
if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
return -XFS_ERROR(EINVAL);
if (copy_from_user(handlep, hanp, hlen))
return -XFS_ERROR(EFAULT);
if (hlen < sizeof(*handlep))
bzero(((char *)handlep) + hlen, sizeof(*handlep) - hlen);
if (hlen > sizeof(handlep->ha_fsid)) {
if (handlep->ha_fid.xfs_fid_len !=
(hlen - sizeof(handlep->ha_fsid)
- sizeof(handlep->ha_fid.xfs_fid_len))
|| handlep->ha_fid.xfs_fid_pad) {
return -XFS_ERROR(EINVAL);
}
}
/*
* Crack the handle, obtain the inode # & generation #
*/
xfid = (struct xfs_fid *)&handlep->ha_fid;
if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
xinode = xfid->xfs_fid_ino;
xigen = xfid->xfs_fid_gen;
} else {
/*
* Invalid. Since handles can be created in user
* space and passed in via gethandle(), this is not
* cause for a panic.
*/
return -XFS_ERROR(EINVAL);
}
/* get the xfs inode */
error = xfs_iget(mp, NULL, xinode, XFS_ILOCK_SHARED, &xip, 0);
if (error)
return -error;
if (xip == NULL)
return -XFS_ERROR(EIO);
if (xip->i_d.di_mode == 0 || xip->i_d.di_gen != xigen) {
xfs_iput(xip, XFS_ILOCK_SHARED);
return -XFS_ERROR(ENOENT);
}
/* get vnode and linux inode */
vp = XFS_ITOV(xip);
inode = LINVFS_GET_IP(vp);
xfs_iunlock(xip, XFS_ILOCK_SHARED);
linvfs_set_inode_ops(inode);
error = linvfs_revalidate_core(inode, ATTR_COMM);
if (error) {
iput(inode);
return -XFS_ERROR(error);
}
/* Copyin and hand off to VFS */
lock_kernel();
error = -EINVAL;
/* allocate space for attribute ops */
ops = (attr_op_t *) kmalloc(attr_hreq.count * sizeof(attr_op_t), GFP_KERNEL);
if (!ops) {
iput(inode);
error = -ENOMEM;
goto unlock;
}
if (copy_from_user(ops, attr_hreq.ops, attr_hreq.count * sizeof(attr_op_t)) != 0) {
iput(inode);
error = -EFAULT;
goto free_mem;
}
UPDATE_ATIME(inode);
/* call through to the vfs: note we know this is an XFS inode */
if (inode->i_op && inode->i_op->attrctl)
error = inode->i_op->attrctl(inode, ops, attr_hreq.count);
VN_RELE(vp);
if (copy_to_user(attr_hreq.ops, ops, attr_hreq.count * sizeof(attr_op_t)) != 0) {
error = -EFAULT;
goto free_mem;
}
free_mem:
kfree(ops);
unlock:
unlock_kernel();
return error;
#else /* !CONFIG_HAVE_ATTRCTL */
return -ENOSYS;
#endif /* CONFIG_HAVE_ATTRCTL */
}
int
xfs_ioctl(
bhv_desc_t *bdp,
struct inode *inode,
struct file *filp,
unsigned int cmd,
unsigned long arg)
{
int error;
struct biosize bs;
struct dioattr da;
struct fsdmidata dmi;
struct fsxattr fa;
cred_t cred; /* Temporary cred workaround */
vattr_t va;
vnode_t *vp;
vfs_t *vfsp;
xfs_fsop_geom_t fsgeo;
xfs_flock64_t bf;
xfs_inode_t *ip;
xfs_mount_t *mp;
vp = LINVFS_GET_VN_ADDRESS(inode);
ASSERT(vp);
vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address);
ip = XFS_BHVTOI(bdp);
mp = ip->i_mount;
vfsp = LINVFS_GET_VFS(inode->i_sb);
ASSERT(vfsp);
switch (cmd) {
case XFS_IOC_ALLOCSP:
case XFS_IOC_FREESP:
case XFS_IOC_RESVSP:
case XFS_IOC_UNRESVSP:
case XFS_IOC_ALLOCSP64:
case XFS_IOC_FREESP64:
case XFS_IOC_RESVSP64:
case XFS_IOC_UNRESVSP64: {
int attr_flags;
if (filp->f_flags & O_RDONLY)
return -XFS_ERROR(EBADF);
if (vp->v_type != VREG)
return -XFS_ERROR(EINVAL);
if (copy_from_user(&bf, (xfs_flock64_t *)arg,
sizeof(xfs_flock64_t)))
return -XFS_ERROR(EFAULT);
attr_flags = (filp->f_flags & (O_NDELAY|O_NONBLOCK))
? ATTR_NONBLOCK : 0;
if (filp->f_flags & O_INVISIBLE)
attr_flags |= ATTR_DMI;
error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos,
&cred, attr_flags);
if (error)
return -error;
return 0;
}
case XFS_IOC_DIOINFO:
da.d_miniosz = mp->m_sb.sb_blocksize;
da.d_mem = 512;
/*
* this only really needs to be BBSIZE.
* it is set to the file system block size to
* avoid having to do block zeroing on short writes.
*/
da.d_maxiosz = XFS_FSB_TO_B(mp,
XFS_B_TO_FSBT(mp, pagebuf_max_direct()));
if (copy_to_user((struct dioattr *)arg, &da,
sizeof(struct dioattr)))
return -XFS_ERROR(EFAULT);
return 0;
case XFS_IOC_FSBULKSTAT_SINGLE:
case XFS_IOC_FSBULKSTAT: {
int count; /* # of records returned */
xfs_ino_t inlast; /* last inode number */
int done; /* = 1 if there are more
* stats to get and if
* bulkstat should be called
* again.
* This is unused in syssgi
* but used in dmi */
xfs_fsop_bulkreq_t bulkreq;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&bulkreq, (xfs_fsop_bulkreq_t *)arg,
sizeof(xfs_fsop_bulkreq_t)))
return -XFS_ERROR(EFAULT);
if (copy_from_user(&inlast, (__s64 *)bulkreq.lastip,
sizeof(__s64)))
return -XFS_ERROR(EFAULT);
if ((count = bulkreq.icount) <= 0)
return -XFS_ERROR(EINVAL);
if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
error = xfs_bulkstat_single(mp, &inlast,
bulkreq.ubuffer, &done);
} else {
if (count == 1 && inlast != 0) {
inlast++;
error = xfs_bulkstat_single(mp, &inlast,
bulkreq.ubuffer, &done);
} else {
error = xfs_bulkstat(mp, NULL, &inlast, &count,
(bulkstat_one_pf)xfs_bulkstat_one,
sizeof(xfs_bstat_t), bulkreq.ubuffer,
BULKSTAT_FG_QUICK, &done);
}
}
if (error)
return -error;
if (bulkreq.ocount != NULL) {
if (copy_to_user((xfs_ino_t *)bulkreq.lastip, &inlast,
sizeof(xfs_ino_t)))
return -XFS_ERROR(EFAULT);
if (copy_to_user((__s32 *)bulkreq.ocount, &count,
sizeof(count)))
return -XFS_ERROR(EFAULT);
}
return 0;
}
case XFS_IOC_FSGEOMETRY:
error = xfs_fs_geometry(mp, &fsgeo, 3);
if (error)
return -error;
if (copy_to_user((xfs_fsop_geom_t *)arg, &fsgeo,
sizeof(xfs_fsop_geom_t)))
return -XFS_ERROR(EFAULT);
return 0;
case XFS_IOC_FSGETXATTR:
va.va_mask = AT_XFLAGS|AT_EXTSIZE|AT_NEXTENTS;
error = xfs_getattr(bdp, &va, 0, &cred);
if (error)
return -error;
fa.fsx_xflags = va.va_xflags;
fa.fsx_extsize = va.va_extsize;
fa.fsx_nextents = va.va_nextents;
if (copy_to_user((struct fsxattr *)arg, &fa,
sizeof(struct fsxattr)))
return -XFS_ERROR(EFAULT);
return 0;
case XFS_IOC_FSSETXATTR: {
int attr_flags;
if (copy_from_user(&fa, (struct fsxattr *)arg,
sizeof(struct fsxattr)))
return -XFS_ERROR(EFAULT);
va.va_mask = AT_XFLAGS | AT_EXTSIZE;
va.va_xflags = fa.fsx_xflags;
va.va_extsize = fa.fsx_extsize;
attr_flags = (filp->f_flags & (O_NDELAY|O_NONBLOCK) )
? ATTR_NONBLOCK : 0;
error = xfs_setattr(bdp, &va, attr_flags, &cred);
if (error)
return -error;
return 0;
}
case XFS_IOC_FSGETXATTRA:
va.va_mask = AT_XFLAGS|AT_EXTSIZE|AT_ANEXTENTS;
error = xfs_getattr(bdp, &va, 0, &cred);
if (error)
return -error;
fa.fsx_xflags = va.va_xflags;
fa.fsx_extsize = va.va_extsize;
fa.fsx_nextents = va.va_anextents;
if (copy_to_user((struct fsxattr *)arg, &fa,
sizeof(struct fsxattr)))
return -XFS_ERROR(EFAULT);
return 0;
case XFS_IOC_GETBIOSIZE:
error = xfs_get_uiosize(mp, ip, &bs, &cred);
if (error)
return -error;
if (copy_to_user((struct biosize *)arg, &bs,
sizeof(struct biosize)))
return -XFS_ERROR(EFAULT);
return 0;
case XFS_IOC_SETBIOSIZE:
if (copy_from_user(&bs, (struct biosize *)arg,
sizeof(struct biosize)))
return -XFS_ERROR(EFAULT);
error = xfs_set_uiosize(mp, ip, bs.biosz_flags, bs.biosz_read,
bs.biosz_write, &cred);
if (error)
return -error;
return 0;
case XFS_IOC_FSSETDM:
if (copy_from_user(&dmi, (struct fsdmidata *)arg,
sizeof(struct fsdmidata)))
return -XFS_ERROR(EFAULT);
error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate,
&cred);
if (error)
return -error;
return 0;
case XFS_IOC_GETBMAP:
case XFS_IOC_GETBMAPA: {
struct getbmap bm;
int iflags;
if (copy_from_user(&bm, (struct getbmap *)arg,
sizeof(struct getbmap)))
return -XFS_ERROR(EFAULT);
if (bm.bmv_count < 2)
return -XFS_ERROR(EINVAL);
iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
if (filp->f_flags & O_INVISIBLE)
iflags |= BMV_IF_NO_DMAPI_READ;
error = xfs_getbmap(bdp, &bm,
(struct getbmap *)arg + 1, iflags);
if (error)
return -error;
if (copy_to_user((struct getbmap *)arg, &bm, sizeof(bm)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_GETBMAPX: {
struct getbmapx bmx;
struct getbmap bm;
int iflags;
if (copy_from_user(&bmx, (struct getbmapx *)arg,
sizeof(struct getbmapx)))
return -XFS_ERROR(EFAULT);
if (bmx.bmv_count < 2)
return -XFS_ERROR(EINVAL);
/*
* Map input getbmapx structure to a getbmap
* structure for xfs_getbmap.
*/
GETBMAP_CONVERT(bmx, bm);
iflags = bmx.bmv_iflags;
if (iflags & (~BMV_IF_VALID))
return -XFS_ERROR(EINVAL);
iflags |= BMV_IF_EXTENDED;
error = xfs_getbmap(bdp, &bm,
(struct getbmapx *)arg + 1, iflags);
if (error)
return -error;
GETBMAP_CONVERT(bm, bmx);
if (copy_to_user((struct getbmapx *)arg, &bmx, sizeof(bmx)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_PATH_TO_FSHANDLE:
case XFS_IOC_FD_TO_HANDLE:
case XFS_IOC_PATH_TO_HANDLE:
/*
* XFS_IOC_PATH_TO_FSHANDLE
* returns fs handle for a mount point or path within
* that mount point
* XFS_IOC_FD_TO_HANDLE
* returns full handle for a FD opened in user space
* XFS_IOC_PATH_TO_HANDLE
* returns full handle for a path
*/
return xfs_find_handle(cmd, arg);
case XFS_IOC_OPEN_BY_HANDLE:
return xfs_open_by_handle(cmd, arg, filp, inode, vfsp, mp);
case XFS_IOC_FSSETDM_BY_HANDLE:
return xfs_fssetdm_by_handle(cmd, arg, filp, inode, vfsp, mp);
case XFS_IOC_READLINK_BY_HANDLE:
return xfs_readlink_by_handle(cmd, arg, filp, inode, vfsp, mp);
case XFS_IOC_ATTRCTL_BY_HANDLE:
return xfs_attrctl_by_handle(cmd, arg, filp, inode, vfsp, mp);
case XFS_IOC_SWAPEXT:
error = xfs_swapext((struct xfs_swapext *)arg);
if (error)
return -error;
return 0;
case XFS_IOC_GETFSUUID:
if (copy_to_user((char *)arg, (char *)&mp->m_sb.sb_uuid,
sizeof(uuid_t)))
return -XFS_ERROR(EFAULT);
return 0;
case XFS_IOC_FSCOUNTS: {
xfs_fsop_counts_t out;
error = xfs_fs_counts(mp, &out);
if (error)
return -error;
if (copy_to_user((char *)arg, &out, sizeof(xfs_fsop_counts_t)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_SET_RESBLKS: {
xfs_fsop_resblks_t inout;
__uint64_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
error = copy_from_user(&inout, (char *)arg, sizeof(xfs_fsop_resblks_t));
if (error)
return -XFS_ERROR(EFAULT);
/* input parameter is passed in resblks field of structure */
in=inout.resblks;
error = xfs_reserve_blocks(mp, &in, &inout);
if (copy_to_user((char *)arg, &inout, sizeof(xfs_fsop_resblks_t)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_GET_RESBLKS: {
xfs_fsop_resblks_t out;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
error = xfs_reserve_blocks(mp, NULL, &out);
if (error)
return -error;
if (copy_to_user((char *)arg, &out, sizeof(xfs_fsop_resblks_t)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_FSGROWFSDATA: {
xfs_growfs_data_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, (char *)arg, sizeof(xfs_growfs_data_t)))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_data(mp, &in);
if (error)
return -error;
return 0;
}
case XFS_IOC_FSGROWFSLOG: {
xfs_growfs_log_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, (char *)arg, sizeof(xfs_growfs_log_t)))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_log(mp, &in);
if (error)
return -error;
return 0;
}
case XFS_IOC_FSGROWFSRT: {
xfs_growfs_rt_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, (char *)arg, sizeof(xfs_growfs_rt_t)))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_rt(mp, &in);
if (error)
return -error;
return 0;
}
case XFS_IOC_FREEZE:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
xfs_fs_freeze(mp);
return 0;
case XFS_IOC_THAW:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
xfs_fs_thaw(mp);
return 0;
#if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
case XFS_IOC_ERROR_INJECTION: {
xfs_error_injection_t in;
error = copy_from_user(&in, (char *)arg, sizeof(xfs_error_injection_t));
if (error) {
return -error;
}
error = xfs_errortag_add(in.errtag, mp);
if (error) {
return -error;
}
return 0;
}
case XFS_IOC_ERROR_CLEARALL:
error = xfs_errortag_clearall(mp);
return -error;
#endif /* DEBUG || INDUCE_IO_ERROR */
default:
return -EINVAL;
}
}
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