Viewing file:  xfs_ioctl.c (21.99 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* 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>
extern int xfs_change_file_space(bhv_desc_t *, int,
xfs_flock64_t *, xfs_off_t, cred_t *, int);
extern int xfs_set_dmattrs(bhv_desc_t *, u_int, u_int16_t, cred_t *);
/*
* xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
* a file or fs 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
*/
STATIC 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;
if (copy_from_user(&hreq, (xfs_fsop_handlereq_t *)arg, sizeof(hreq)))
return -XFS_ERROR(EFAULT);
bzero((char *)&handle, sizeof(handle));
switch (cmd) {
case XFS_IOC_PATH_TO_FSHANDLE:
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 (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
xfs_inode_t *ip;
bhv_desc_t *bhv;
int lock_mode;
/* 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;
}
/*
* Convert userspace handle data into vnode (and inode).
* We [ab]use the fact that all the fsop_handlereq ioctl calls
* have a data structure argument whose first component is always
* a xfs_fsop_handlereq_t, so we can cast to and from this type.
* This allows us to optimise the copy_from_user calls and gives
* a handy, shared routine.
*
* If no error, caller must always VN_RELE the returned vp.
*/
STATIC int
xfs_vget_fsop_handlereq(
xfs_mount_t *mp,
struct inode *parinode, /* parent inode pointer */
int cap, /* capability level for op */
unsigned long arg, /* userspace data pointer */
unsigned long size, /* size of expected struct */
/* output arguments */
xfs_fsop_handlereq_t *hreq,
vnode_t **vp,
struct inode **inode)
{
void *hanp;
size_t hlen;
xfs_fid_t *xfid;
xfs_handle_t *handlep;
xfs_handle_t handle;
xfs_inode_t *ip;
struct inode *inodep;
vnode_t *vpp;
__u32 igen;
ino_t ino;
int error;
if (!capable(cap))
return XFS_ERROR(EPERM);
/*
* Only allow handle opens under a directory.
*/
if (!S_ISDIR(parinode->i_mode))
return XFS_ERROR(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, size))
return XFS_ERROR(EFAULT);
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)) {
ino = xfid->xfs_fid_ino;
igen = xfid->xfs_fid_gen;
} else {
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);
}
vpp = XFS_ITOV(ip);
inodep = LINVFS_GET_IP(vpp);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
linvfs_set_inode_ops(inodep);
error = linvfs_revalidate_core(inodep, ATTR_COMM);
if (error) {
iput(inodep);
return XFS_ERROR(error);
}
*vp = vpp;
*inode = inodep;
return 0;
}
STATIC int
xfs_open_by_handle(
xfs_mount_t *mp,
unsigned long arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
int new_fd;
int permflag;
struct file *filp;
struct inode *inode;
struct dentry *dentry;
vnode_t *vp;
xfs_fsop_handlereq_t hreq;
struct list_head *lp;
error = xfs_vget_fsop_handlereq(mp, parinode, CAP_SYS_ADMIN, arg,
sizeof(xfs_fsop_handlereq_t),
&hreq, &vp, &inode);
if (error)
return -error;
/* Restrict xfs_open_by_handle 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);
}
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:
/* Ensure umount returns 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));
}
filp->f_mode |= FINVIS;
fd_install(new_fd, filp);
return new_fd;
}
STATIC int
xfs_readlink_by_handle(
xfs_mount_t *mp,
unsigned long arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
struct iovec aiov;
struct uio auio;
struct inode *inode;
xfs_fsop_handlereq_t hreq;
vnode_t *vp;
__u32 olen;
error = xfs_vget_fsop_handlereq(mp, parinode, CAP_SYS_ADMIN, arg,
sizeof(xfs_fsop_handlereq_t),
&hreq, &vp, &inode);
if (error)
return -error;
/* Restrict this handle operation to symlinks only. */
if (vp->v_type != VLNK) {
VN_RELE(vp);
return -XFS_ERROR(EINVAL);
}
if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
VN_RELE(vp);
return -XFS_ERROR(EFAULT);
}
aiov.iov_len = olen;
aiov.iov_base = hreq.ohandle;
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, NULL, error);
VN_RELE(vp);
return (olen - auio.uio_resid);
}
STATIC int
xfs_fssetdm_by_handle(
xfs_mount_t *mp,
unsigned long arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
struct fsdmidata fsd;
xfs_fsop_setdm_handlereq_t dmhreq;
struct inode *inode;
bhv_desc_t *bdp;
vnode_t *vp;
error = xfs_vget_fsop_handlereq(mp, parinode, CAP_MKNOD, arg,
sizeof(xfs_fsop_setdm_handlereq_t),
(xfs_fsop_handlereq_t *)&dmhreq,
&vp, &inode);
if (error)
return -error;
if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
VN_RELE(vp);
return -XFS_ERROR(EFAULT);
}
bdp = bhv_base_unlocked(VN_BHV_HEAD(vp));
error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate,
get_current_cred());
VN_RELE(vp);
if (error)
return -error;
return 0;
}
STATIC int
xfs_attrlist_by_handle(
xfs_mount_t *mp,
unsigned long arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
attrlist_cursor_kern_t *cursor;
xfs_fsop_attrlist_handlereq_t al_hreq;
struct inode *inode;
vnode_t *vp;
error = xfs_vget_fsop_handlereq(mp, parinode, CAP_SYS_ADMIN, arg,
sizeof(xfs_fsop_attrlist_handlereq_t),
(xfs_fsop_handlereq_t *)&al_hreq,
&vp, &inode);
if (error)
return -error;
cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
VOP_ATTR_LIST(vp, al_hreq.buffer, al_hreq.buflen, al_hreq.flags,
cursor, NULL, error);
VN_RELE(vp);
if (error)
return -error;
return 0;
}
STATIC int
xfs_attrmulti_by_handle(
xfs_mount_t *mp,
unsigned long arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
xfs_attr_multiop_t *ops;
xfs_fsop_attrmulti_handlereq_t am_hreq;
struct inode *inode;
vnode_t *vp;
int i, size;
error = xfs_vget_fsop_handlereq(mp, parinode, CAP_SYS_ADMIN, arg,
sizeof(xfs_fsop_attrmulti_handlereq_t),
(xfs_fsop_handlereq_t *)&am_hreq,
&vp, &inode);
if (error)
return -error;
size = am_hreq.opcount * sizeof(attr_multiop_t);
ops = (xfs_attr_multiop_t *)kmalloc(size, GFP_KERNEL);
if (!ops) {
VN_RELE(vp);
return -XFS_ERROR(ENOMEM);
}
if (copy_from_user(ops, am_hreq.ops, size)) {
kfree(ops);
VN_RELE(vp);
return -XFS_ERROR(EFAULT);
}
for (i = 0; i < am_hreq.opcount; i++) {
switch(ops[i].am_opcode) {
case ATTR_OP_GET:
VOP_ATTR_GET(vp,ops[i].am_attrname, ops[i].am_attrvalue,
&ops[i].am_length, ops[i].am_flags,
NULL, ops[i].am_error);
break;
case ATTR_OP_SET:
VOP_ATTR_SET(vp,ops[i].am_attrname, ops[i].am_attrvalue,
ops[i].am_length, ops[i].am_flags,
NULL, ops[i].am_error);
break;
case ATTR_OP_REMOVE:
VOP_ATTR_REMOVE(vp, ops[i].am_attrname, ops[i].am_flags,
NULL, ops[i].am_error);
break;
default:
ops[i].am_error = EINVAL;
}
}
if (copy_to_user(am_hreq.ops, ops, size))
error = -XFS_ERROR(EFAULT);
kfree(ops);
VN_RELE(vp);
return error;
}
int
xfs_ioctl(
bhv_desc_t *bdp,
struct inode *inode,
struct file *filp,
unsigned int cmd,
unsigned long arg)
{
int error;
cred_t cred; /* Temporary cred workaround */
vattr_t va;
vnode_t *vp;
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;
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: {
xfs_flock64_t bf;
int attr_flags = 0;
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(bf)))
return -XFS_ERROR(EFAULT);
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
attr_flags |= ATTR_NONBLOCK;
if (filp->f_mode & FINVIS)
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: {
struct dioattr da;
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(da)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_FSBULKSTAT_SINGLE:
case XFS_IOC_FSBULKSTAT:
case XFS_IOC_FSINUMBERS: {
xfs_fsop_bulkreq_t bulkreq;
int count; /* # of records returned */
xfs_ino_t inlast; /* last inode number */
int done;
/* done = 1 if there are more stats to get and if bulkstat */
/* should be called again (unused here, but used in dmapi) */
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (XFS_FORCED_SHUTDOWN(mp))
return -XFS_ERROR(EIO);
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_FSINUMBERS)
error = xfs_inumbers(mp, NULL, &inlast, &count,
bulkreq.ubuffer);
else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
error = xfs_bulkstat_single(mp, &inlast,
bulkreq.ubuffer, &done);
else { /* XFS_IOC_FSBULKSTAT */
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: {
xfs_fsop_geom_t fsgeo;
error = xfs_fs_geometry(mp, &fsgeo, 3);
if (error)
return -error;
if (copy_to_user((xfs_fsop_geom_t *)arg, &fsgeo, sizeof(fsgeo)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_FSGETXATTR: {
struct fsxattr fa;
va.va_mask = AT_XFLAGS|AT_EXTSIZE|AT_NEXTENTS;
VOP_GETATTR(vp, &va, 0, &cred, error);
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(fa)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_FSSETXATTR: {
struct fsxattr fa;
int attr_flags = 0;
if (copy_from_user(&fa, (struct fsxattr *)arg, sizeof(fa)))
return -XFS_ERROR(EFAULT);
va.va_mask = AT_XFLAGS | AT_EXTSIZE;
va.va_xflags = fa.fsx_xflags;
va.va_extsize = fa.fsx_extsize;
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
attr_flags |= ATTR_NONBLOCK;
VOP_SETATTR(vp, &va, attr_flags, &cred, error);
if (error)
return -error;
return 0;
}
case XFS_IOC_FSGETXATTRA: {
struct fsxattr fa;
va.va_mask = AT_XFLAGS|AT_EXTSIZE|AT_ANEXTENTS;
VOP_GETATTR(vp, &va, 0, &cred, error);
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(fa)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_FSSETDM: {
struct fsdmidata dmi;
if (copy_from_user(&dmi, (struct fsdmidata *)arg, sizeof(dmi)))
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(bm)))
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_mode & FINVIS)
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(bmx)))
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_FD_TO_HANDLE:
case XFS_IOC_PATH_TO_HANDLE:
case XFS_IOC_PATH_TO_FSHANDLE:
return xfs_find_handle(cmd, arg);
case XFS_IOC_OPEN_BY_HANDLE:
return xfs_open_by_handle(mp, arg, filp, inode);
case XFS_IOC_FSSETDM_BY_HANDLE:
return xfs_fssetdm_by_handle(mp, arg, filp, inode);
case XFS_IOC_READLINK_BY_HANDLE:
return xfs_readlink_by_handle(mp, arg, filp, inode);
case XFS_IOC_ATTRLIST_BY_HANDLE:
return xfs_attrlist_by_handle(mp, arg, filp, inode);
case XFS_IOC_ATTRMULTI_BY_HANDLE:
return xfs_attrmulti_by_handle(mp, arg, filp, inode);
case XFS_IOC_SWAPEXT: {
error = xfs_swapext((struct xfs_swapext *)arg);
if (error)
return -error;
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(out)))
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;
if (copy_from_user(&inout, (char *)arg, sizeof(inout)))
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(inout)))
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(out)))
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(in)))
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(in)))
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(in)))
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;
case XFS_IOC_ERROR_INJECTION: {
xfs_error_injection_t in;
if (copy_from_user(&in, (char *)arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
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;
default:
return -ENOTTY;
}
}
|