File: [Development] / xfs-linux-nodel / linux-2.6 / xfs_ioctl.c (download)
Revision 1.159, Mon Nov 19 14:46:07 2007 UTC (9 years, 11 months ago) by lachlan.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.158: +8 -12
lines
Undoes mod: xfs-linux-melb:xfs-kern:29840a
Various fixups for xfs_bulkstat().
- sanity check for NULL user buffer in xfs_ioc_bulkstat[_compat]()
- remove the special case for XFS_IOC_FSBULKSTAT with count == 1. This special
case causes bulkstat to fail because the special case uses xfs_bulkstat_single()
instead of xfs_bulkstat() and the two functions have different semantics.
xfs_bulkstat() will return the next inode after the one supplied while skipping
internal inodes (ie quota inodes). xfs_bulkstate_single() will only lookup the
inode supplied and return an error if it is an internal inode.
- in xfs_bulkstat(), need to initialise 'lastino' to the inode supplied so in cases
were we return without examining any inodes the scan wont restart back at zero.
- sanity check for valid *ubcountp values. Cannot sanity check for valid ubuffer
here because some users of xfs_bulkstat() don't supply a buffer.
- checks against 'ubleft' (the space left in the user's buffer) should be against
'statstruct_size' which is the supplied minimum object size. The mixture of
checks against statstruct_size and 0 was one of the reasons we were skipping
inodes.
- if the formatter function returns BULKSTAT_RV_NOTHING and an error and the error
is not ENOENT or EINVAL then we need to abort the scan. ENOENT is for inodes that
are no longer valid and we just skip them. EINVAL is returned if we try to lookup
an internal inode so we skip them too. For a DMF scan if the inode and DMF
attribute cannot fit into the space left in the user's buffer it would return
ERANGE. We didn't handle this error and skipped the inode. We would continue to
skip inodes until one fitted into the user's buffer or we completed the scan.
- put back the recalculation of agino (that got removed with the last fix) at the
end of the while loop. This is because the code at the start of the loop expects
agino to be the last inode examined if it is non-zero.
- if we found some inodes but then encountered an error, return success this time
and the error next time. If the formatter aborted with ENOMEM we will now return
this error but only if we couldn't read any inodes. Previously if we encountered
ENOMEM without reading any inodes we returned a zero count and no error which
falsely indicated the scan was complete.
Merge of xfs-linux-melb:xfs-kern:30089a by kenmcd.
|
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir2.h"
#include "xfs_alloc.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_attr_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_btree.h"
#include "xfs_ialloc.h"
#include "xfs_rtalloc.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_rw.h"
#include "xfs_acl.h"
#include "xfs_attr.h"
#include "xfs_bmap.h"
#include "xfs_buf_item.h"
#include "xfs_utils.h"
#include "xfs_dfrag.h"
#include "xfs_fsops.h"
#include "xfs_vnodeops.h"
#include <linux/capability.h>
#include <linux/dcache.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/pagemap.h>
/*
* 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,
void __user *arg)
{
int hsize;
xfs_handle_t handle;
xfs_fsop_handlereq_t hreq;
struct inode *inode;
if (copy_from_user(&hreq, arg, sizeof(hreq)))
return -XFS_ERROR(EFAULT);
memset((char *)&handle, 0, sizeof(handle));
switch (cmd) {
case XFS_IOC_PATH_TO_FSHANDLE:
case XFS_IOC_PATH_TO_HANDLE: {
struct nameidata nd;
int error;
error = user_path_walk_link((const char __user *)hreq.path, &nd);
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_path.dentry);
ASSERT(file->f_path.dentry->d_inode);
inode = igrab(file->f_path.dentry->d_inode);
fput(file);
break;
}
default:
ASSERT(0);
return -XFS_ERROR(EINVAL);
}
if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
/* we're not in XFS anymore, Toto */
iput(inode);
return -XFS_ERROR(EINVAL);
}
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
case S_IFDIR:
case S_IFLNK:
break;
default:
iput(inode);
return -XFS_ERROR(EBADF);
}
/* now we can grab the fsid */
memcpy(&handle.ha_fsid, XFS_I(inode)->i_mount->m_fixedfsid,
sizeof(xfs_fsid_t));
hsize = sizeof(xfs_fsid_t);
if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
xfs_inode_t *ip = XFS_I(inode);
int lock_mode;
/* need to get access to the xfs_inode to read the generation */
lock_mode = xfs_ilock_map_shared(ip);
/* fill in fid section of handle from inode */
handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
sizeof(handle.ha_fid.fid_len);
handle.ha_fid.fid_pad = 0;
handle.ha_fid.fid_gen = ip->i_d.di_gen;
handle.ha_fid.fid_ino = ip->i_ino;
xfs_iunlock_map_shared(ip, lock_mode);
hsize = XFS_HSIZE(handle);
}
/* now copy our handle into the user buffer & write out the size */
if (copy_to_user(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 inode.
*
* We 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 pass that sub structure into this handy, shared routine.
*
* If no error, caller must always iput the returned inode.
*/
STATIC int
xfs_vget_fsop_handlereq(
xfs_mount_t *mp,
struct inode *parinode, /* parent inode pointer */
xfs_fsop_handlereq_t *hreq,
struct inode **inode)
{
void __user *hanp;
size_t hlen;
xfs_fid_t *xfid;
xfs_handle_t *handlep;
xfs_handle_t handle;
xfs_inode_t *ip;
xfs_ino_t ino;
__u32 igen;
int error;
/*
* Only allow handle opens under a directory.
*/
if (!S_ISDIR(parinode->i_mode))
return XFS_ERROR(ENOTDIR);
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))
memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen);
if (hlen > sizeof(handlep->ha_fsid)) {
if (handlep->ha_fid.fid_len !=
(hlen - sizeof(handlep->ha_fsid) -
sizeof(handlep->ha_fid.fid_len)) ||
handlep->ha_fid.fid_pad)
return XFS_ERROR(EINVAL);
}
/*
* Crack the handle, obtain the inode # & generation #
*/
xfid = (struct xfs_fid *)&handlep->ha_fid;
if (xfid->fid_len == sizeof(*xfid) - sizeof(xfid->fid_len)) {
ino = xfid->fid_ino;
igen = xfid->fid_gen;
} else {
return XFS_ERROR(EINVAL);
}
/*
* Get the XFS inode, building a Linux inode to go with it.
*/
error = xfs_iget(mp, NULL, ino, 0, 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_new(ip, XFS_ILOCK_SHARED);
return XFS_ERROR(ENOENT);
}
xfs_iunlock(ip, XFS_ILOCK_SHARED);
*inode = XFS_ITOV(ip);
return 0;
}
STATIC int
xfs_open_by_handle(
xfs_mount_t *mp,
void __user *arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
int new_fd;
int permflag;
struct file *filp;
struct inode *inode;
struct dentry *dentry;
xfs_fsop_handlereq_t hreq;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
return -XFS_ERROR(EFAULT);
error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &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);
}
#if BITS_PER_LONG != 32
hreq.oflags |= O_LARGEFILE;
#endif
/* Put open permission in namei format. */
permflag = hreq.oflags;
if ((permflag+1) & O_ACCMODE)
permflag++;
if (permflag & O_TRUNC)
permflag |= 2;
if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
(permflag & FMODE_WRITE) && IS_APPEND(inode)) {
iput(inode);
return -XFS_ERROR(EPERM);
}
if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
iput(inode);
return -XFS_ERROR(EACCES);
}
/* 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;
}
dentry = d_alloc_anon(inode);
if (dentry == NULL) {
iput(inode);
put_unused_fd(new_fd);
return -XFS_ERROR(ENOMEM);
}
/* Ensure umount returns EBUSY on umounts while this file is open. */
mntget(parfilp->f_path.mnt);
/* Create file pointer. */
filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags);
if (IS_ERR(filp)) {
put_unused_fd(new_fd);
return -XFS_ERROR(-PTR_ERR(filp));
}
if (inode->i_mode & S_IFREG) {
/* invisible operation should not change atime */
filp->f_flags |= O_NOATIME;
filp->f_op = &xfs_invis_file_operations;
}
fd_install(new_fd, filp);
return new_fd;
}
/*
* This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
* unused first argument.
*/
STATIC int
do_readlink(
char __user *buffer,
int buflen,
const char *link)
{
int len;
len = PTR_ERR(link);
if (IS_ERR(link))
goto out;
len = strlen(link);
if (len > (unsigned) buflen)
len = buflen;
if (copy_to_user(buffer, link, len))
len = -EFAULT;
out:
return len;
}
STATIC int
xfs_readlink_by_handle(
xfs_mount_t *mp,
void __user *arg,
struct inode *parinode)
{
struct inode *inode;
xfs_fsop_handlereq_t hreq;
__u32 olen;
void *link;
int error;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
return -XFS_ERROR(EFAULT);
error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode);
if (error)
return -error;
/* Restrict this handle operation to symlinks only. */
if (!S_ISLNK(inode->i_mode)) {
error = -XFS_ERROR(EINVAL);
goto out_iput;
}
if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
error = -XFS_ERROR(EFAULT);
goto out_iput;
}
link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
if (!link)
goto out_iput;
error = -xfs_readlink(XFS_I(inode), link);
if (error)
goto out_kfree;
error = do_readlink(hreq.ohandle, olen, link);
if (error)
goto out_kfree;
out_kfree:
kfree(link);
out_iput:
iput(inode);
return error;
}
STATIC int
xfs_fssetdm_by_handle(
xfs_mount_t *mp,
void __user *arg,
struct inode *parinode)
{
int error;
struct fsdmidata fsd;
xfs_fsop_setdm_handlereq_t dmhreq;
struct inode *inode;
if (!capable(CAP_MKNOD))
return -XFS_ERROR(EPERM);
if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
return -XFS_ERROR(EFAULT);
error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &inode);
if (error)
return -error;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
error = -XFS_ERROR(EPERM);
goto out;
}
if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
error = -XFS_ERROR(EFAULT);
goto out;
}
error = -xfs_set_dmattrs(XFS_I(inode), fsd.fsd_dmevmask,
fsd.fsd_dmstate);
out:
iput(inode);
return error;
}
STATIC int
xfs_attrlist_by_handle(
xfs_mount_t *mp,
void __user *arg,
struct inode *parinode)
{
int error;
attrlist_cursor_kern_t *cursor;
xfs_fsop_attrlist_handlereq_t al_hreq;
struct inode *inode;
char *kbuf;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
return -XFS_ERROR(EFAULT);
if (al_hreq.buflen > XATTR_LIST_MAX)
return -XFS_ERROR(EINVAL);
error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, &inode);
if (error)
goto out;
kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
if (!kbuf)
goto out_vn_rele;
cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
error = xfs_attr_list(XFS_I(inode), kbuf, al_hreq.buflen,
al_hreq.flags, cursor);
if (error)
goto out_kfree;
if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
error = -EFAULT;
out_kfree:
kfree(kbuf);
out_vn_rele:
iput(inode);
out:
return -error;
}
STATIC int
xfs_attrmulti_attr_get(
struct inode *inode,
char *name,
char __user *ubuf,
__uint32_t *len,
__uint32_t flags)
{
char *kbuf;
int error = EFAULT;
if (*len > XATTR_SIZE_MAX)
return EINVAL;
kbuf = kmalloc(*len, GFP_KERNEL);
if (!kbuf)
return ENOMEM;
error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags, NULL);
if (error)
goto out_kfree;
if (copy_to_user(ubuf, kbuf, *len))
error = EFAULT;
out_kfree:
kfree(kbuf);
return error;
}
STATIC int
xfs_attrmulti_attr_set(
struct inode *inode,
char *name,
const char __user *ubuf,
__uint32_t len,
__uint32_t flags)
{
char *kbuf;
int error = EFAULT;
if (IS_RDONLY(inode))
return -EROFS;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
return EPERM;
if (len > XATTR_SIZE_MAX)
return EINVAL;
kbuf = kmalloc(len, GFP_KERNEL);
if (!kbuf)
return ENOMEM;
if (copy_from_user(kbuf, ubuf, len))
goto out_kfree;
error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
out_kfree:
kfree(kbuf);
return error;
}
STATIC int
xfs_attrmulti_attr_remove(
struct inode *inode,
char *name,
__uint32_t flags)
{
if (IS_RDONLY(inode))
return -EROFS;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
return EPERM;
return xfs_attr_remove(XFS_I(inode), name, flags);
}
STATIC int
xfs_attrmulti_by_handle(
xfs_mount_t *mp,
void __user *arg,
struct inode *parinode)
{
int error;
xfs_attr_multiop_t *ops;
xfs_fsop_attrmulti_handlereq_t am_hreq;
struct inode *inode;
unsigned int i, size;
char *attr_name;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
return -XFS_ERROR(EFAULT);
error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &inode);
if (error)
goto out;
error = E2BIG;
size = am_hreq.opcount * sizeof(attr_multiop_t);
if (!size || size > 16 * PAGE_SIZE)
goto out_vn_rele;
error = ENOMEM;
ops = kmalloc(size, GFP_KERNEL);
if (!ops)
goto out_vn_rele;
error = EFAULT;
if (copy_from_user(ops, am_hreq.ops, size))
goto out_kfree_ops;
attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
if (!attr_name)
goto out_kfree_ops;
error = 0;
for (i = 0; i < am_hreq.opcount; i++) {
ops[i].am_error = strncpy_from_user(attr_name,
ops[i].am_attrname, MAXNAMELEN);
if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
error = -ERANGE;
if (ops[i].am_error < 0)
break;
switch (ops[i].am_opcode) {
case ATTR_OP_GET:
ops[i].am_error = xfs_attrmulti_attr_get(inode,
attr_name, ops[i].am_attrvalue,
&ops[i].am_length, ops[i].am_flags);
break;
case ATTR_OP_SET:
ops[i].am_error = xfs_attrmulti_attr_set(inode,
attr_name, ops[i].am_attrvalue,
ops[i].am_length, ops[i].am_flags);
break;
case ATTR_OP_REMOVE:
ops[i].am_error = xfs_attrmulti_attr_remove(inode,
attr_name, ops[i].am_flags);
break;
default:
ops[i].am_error = EINVAL;
}
}
if (copy_to_user(am_hreq.ops, ops, size))
error = XFS_ERROR(EFAULT);
kfree(attr_name);
out_kfree_ops:
kfree(ops);
out_vn_rele:
iput(inode);
out:
return -error;
}
/* prototypes for a few of the stack-hungry cases that have
* their own functions. Functions are defined after their use
* so gcc doesn't get fancy and inline them with -03 */
STATIC int
xfs_ioc_space(
struct xfs_inode *ip,
struct inode *inode,
struct file *filp,
int flags,
unsigned int cmd,
void __user *arg);
STATIC int
xfs_ioc_bulkstat(
xfs_mount_t *mp,
unsigned int cmd,
void __user *arg);
STATIC int
xfs_ioc_fsgeometry_v1(
xfs_mount_t *mp,
void __user *arg);
STATIC int
xfs_ioc_fsgeometry(
xfs_mount_t *mp,
void __user *arg);
STATIC int
xfs_ioc_xattr(
xfs_inode_t *ip,
struct file *filp,
unsigned int cmd,
void __user *arg);
STATIC int
xfs_ioc_fsgetxattr(
xfs_inode_t *ip,
int attr,
void __user *arg);
STATIC int
xfs_ioc_getbmap(
struct xfs_inode *ip,
int flags,
unsigned int cmd,
void __user *arg);
STATIC int
xfs_ioc_getbmapx(
struct xfs_inode *ip,
void __user *arg);
int
xfs_ioctl(
xfs_inode_t *ip,
struct file *filp,
int ioflags,
unsigned int cmd,
void __user *arg)
{
struct inode *inode = filp->f_path.dentry->d_inode;
xfs_mount_t *mp = ip->i_mount;
int error;
xfs_itrace_entry(XFS_I(inode));
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:
/*
* Only allow the sys admin to reserve space unless
* unwritten extents are enabled.
*/
if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) &&
!capable(CAP_SYS_ADMIN))
return -EPERM;
return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg);
case XFS_IOC_DIOINFO: {
struct dioattr da;
xfs_buftarg_t *target =
XFS_IS_REALTIME_INODE(ip) ?
mp->m_rtdev_targp : mp->m_ddev_targp;
da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
if (copy_to_user(arg, &da, sizeof(da)))
return -XFS_ERROR(EFAULT);
return 0;
}
case XFS_IOC_FSBULKSTAT_SINGLE:
case XFS_IOC_FSBULKSTAT:
case XFS_IOC_FSINUMBERS:
return xfs_ioc_bulkstat(mp, cmd, arg);
case XFS_IOC_FSGEOMETRY_V1:
return xfs_ioc_fsgeometry_v1(mp, arg);
case XFS_IOC_FSGEOMETRY:
return xfs_ioc_fsgeometry(mp, arg);
case XFS_IOC_GETVERSION:
return put_user(inode->i_generation, (int __user *)arg);
case XFS_IOC_FSGETXATTR:
return xfs_ioc_fsgetxattr(ip, 0, arg);
case XFS_IOC_FSGETXATTRA:
return xfs_ioc_fsgetxattr(ip, 1, arg);
case XFS_IOC_GETXFLAGS:
case XFS_IOC_SETXFLAGS:
case XFS_IOC_FSSETXATTR:
return xfs_ioc_xattr(ip, filp, cmd, arg);
case XFS_IOC_FSSETDM: {
struct fsdmidata dmi;
if (copy_from_user(&dmi, arg, sizeof(dmi)))
return -XFS_ERROR(EFAULT);
error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
dmi.fsd_dmstate);
return -error;
}
case XFS_IOC_GETBMAP:
case XFS_IOC_GETBMAPA:
return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
case XFS_IOC_GETBMAPX:
return xfs_ioc_getbmapx(ip, arg);
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, inode);
case XFS_IOC_READLINK_BY_HANDLE:
return xfs_readlink_by_handle(mp, arg, inode);
case XFS_IOC_ATTRLIST_BY_HANDLE:
return xfs_attrlist_by_handle(mp, arg, inode);
case XFS_IOC_ATTRMULTI_BY_HANDLE:
return xfs_attrmulti_by_handle(mp, arg, inode);
case XFS_IOC_SWAPEXT: {
error = xfs_swapext((struct xfs_swapext __user *)arg);
return -error;
}
case XFS_IOC_FSCOUNTS: {
xfs_fsop_counts_t out;
error = xfs_fs_counts(mp, &out);
if (error)
return -error;
if (copy_to_user(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, 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 (error)
return -error;
if (copy_to_user(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(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, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_data(mp, &in);
return -error;
}
case XFS_IOC_FSGROWFSLOG: {
xfs_growfs_log_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_log(mp, &in);
return -error;
}
case XFS_IOC_FSGROWFSRT: {
xfs_growfs_rt_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_rt(mp, &in);
return -error;
}
case XFS_IOC_FREEZE:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (inode->i_sb->s_frozen == SB_UNFROZEN)
freeze_bdev(inode->i_sb->s_bdev);
return 0;
case XFS_IOC_THAW:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (inode->i_sb->s_frozen != SB_UNFROZEN)
thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
return 0;
case XFS_IOC_GOINGDOWN: {
__uint32_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(in, (__uint32_t __user *)arg))
return -XFS_ERROR(EFAULT);
error = xfs_fs_goingdown(mp, in);
return -error;
}
case XFS_IOC_ERROR_INJECTION: {
xfs_error_injection_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, arg, sizeof(in)))
return -XFS_ERROR(EFAULT);
error = xfs_errortag_add(in.errtag, mp);
return -error;
}
case XFS_IOC_ERROR_CLEARALL:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
error = xfs_errortag_clearall(mp, 1);
return -error;
default:
return -ENOTTY;
}
}
STATIC int
xfs_ioc_space(
struct xfs_inode *ip,
struct inode *inode,
struct file *filp,
int ioflags,
unsigned int cmd,
void __user *arg)
{
xfs_flock64_t bf;
int attr_flags = 0;
int error;
if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
return -XFS_ERROR(EPERM);
if (!(filp->f_mode & FMODE_WRITE))
return -XFS_ERROR(EBADF);
if (!S_ISREG(inode->i_mode))
return -XFS_ERROR(EINVAL);
if (copy_from_user(&bf, arg, sizeof(bf)))
return -XFS_ERROR(EFAULT);
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
attr_flags |= ATTR_NONBLOCK;
if (ioflags & IO_INVIS)
attr_flags |= ATTR_DMI;
error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos,
NULL, attr_flags);
return -error;
}
STATIC int
xfs_ioc_bulkstat(
xfs_mount_t *mp,
unsigned int cmd,
void __user *arg)
{
xfs_fsop_bulkreq_t bulkreq;
int count; /* # of records returned */
xfs_ino_t inlast; /* last inode number */
int done;
int error;
/* 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, arg, sizeof(xfs_fsop_bulkreq_t)))
return -XFS_ERROR(EFAULT);
if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
return -XFS_ERROR(EFAULT);
if ((count = bulkreq.icount) <= 0)
return -XFS_ERROR(EINVAL);
if (bulkreq.ubuffer == NULL)
return -XFS_ERROR(EINVAL);
if (cmd == XFS_IOC_FSINUMBERS)
error = xfs_inumbers(mp, &inlast, &count,
bulkreq.ubuffer, xfs_inumbers_fmt);
else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
error = xfs_bulkstat_single(mp, &inlast,
bulkreq.ubuffer, &done);
else /* XFS_IOC_FSBULKSTAT */
error = xfs_bulkstat(mp, &inlast, &count,
(bulkstat_one_pf)xfs_bulkstat_one, NULL,
sizeof(xfs_bstat_t), bulkreq.ubuffer,
BULKSTAT_FG_QUICK, &done);
if (error)
return -error;
if (bulkreq.ocount != NULL) {
if (copy_to_user(bulkreq.lastip, &inlast,
sizeof(xfs_ino_t)))
return -XFS_ERROR(EFAULT);
if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
return -XFS_ERROR(EFAULT);
}
return 0;
}
STATIC int
xfs_ioc_fsgeometry_v1(
xfs_mount_t *mp,
void __user *arg)
{
xfs_fsop_geom_v1_t fsgeo;
int error;
error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
if (error)
return -error;
if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
return -XFS_ERROR(EFAULT);
return 0;
}
STATIC int
xfs_ioc_fsgeometry(
xfs_mount_t *mp,
void __user *arg)
{
xfs_fsop_geom_t fsgeo;
int error;
error = xfs_fs_geometry(mp, &fsgeo, 4);
if (error)
return -error;
if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
return -XFS_ERROR(EFAULT);
return 0;
}
/*
* Linux extended inode flags interface.
*/
STATIC unsigned int
xfs_merge_ioc_xflags(
unsigned int flags,
unsigned int start)
{
unsigned int xflags = start;
if (flags & FS_IMMUTABLE_FL)
xflags |= XFS_XFLAG_IMMUTABLE;
else
xflags &= ~XFS_XFLAG_IMMUTABLE;
if (flags & FS_APPEND_FL)
xflags |= XFS_XFLAG_APPEND;
else
xflags &= ~XFS_XFLAG_APPEND;
if (flags & FS_SYNC_FL)
xflags |= XFS_XFLAG_SYNC;
else
xflags &= ~XFS_XFLAG_SYNC;
if (flags & FS_NOATIME_FL)
xflags |= XFS_XFLAG_NOATIME;
else
xflags &= ~XFS_XFLAG_NOATIME;
if (flags & FS_NODUMP_FL)
xflags |= XFS_XFLAG_NODUMP;
else
xflags &= ~XFS_XFLAG_NODUMP;
return xflags;
}
STATIC unsigned int
xfs_di2lxflags(
__uint16_t di_flags)
{
unsigned int flags = 0;
if (di_flags & XFS_DIFLAG_IMMUTABLE)
flags |= FS_IMMUTABLE_FL;
if (di_flags & XFS_DIFLAG_APPEND)
flags |= FS_APPEND_FL;
if (di_flags & XFS_DIFLAG_SYNC)
flags |= FS_SYNC_FL;
if (di_flags & XFS_DIFLAG_NOATIME)
flags |= FS_NOATIME_FL;
if (di_flags & XFS_DIFLAG_NODUMP)
flags |= FS_NODUMP_FL;
return flags;
}
STATIC int
xfs_ioc_fsgetxattr(
xfs_inode_t *ip,
int attr,
void __user *arg)
{
struct fsxattr fa;
xfs_ilock(ip, XFS_ILOCK_SHARED);
fa.fsx_xflags = xfs_ip2xflags(ip);
fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
fa.fsx_projid = ip->i_d.di_projid;
if (attr) {
if (ip->i_afp) {
if (ip->i_afp->if_flags & XFS_IFEXTENTS)
fa.fsx_nextents = ip->i_afp->if_bytes /
sizeof(xfs_bmbt_rec_t);
else
fa.fsx_nextents = ip->i_d.di_anextents;
} else
fa.fsx_nextents = 0;
} else {
if (ip->i_df.if_flags & XFS_IFEXTENTS)
fa.fsx_nextents = ip->i_df.if_bytes /
sizeof(xfs_bmbt_rec_t);
else
fa.fsx_nextents = ip->i_d.di_nextents;
}
xfs_iunlock(ip, XFS_ILOCK_SHARED);
if (copy_to_user(arg, &fa, sizeof(fa)))
return -EFAULT;
return 0;
}
STATIC int
xfs_ioc_xattr(
xfs_inode_t *ip,
struct file *filp,
unsigned int cmd,
void __user *arg)
{
struct fsxattr fa;
struct bhv_vattr *vattr;
int error = 0;
int attr_flags;
unsigned int flags;
vattr = kmalloc(sizeof(*vattr), GFP_KERNEL);
if (unlikely(!vattr))
return -ENOMEM;
switch (cmd) {
case XFS_IOC_FSSETXATTR: {
if (copy_from_user(&fa, arg, sizeof(fa))) {
error = -EFAULT;
break;
}
attr_flags = 0;
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
attr_flags |= ATTR_NONBLOCK;
vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID;
vattr->va_xflags = fa.fsx_xflags;
vattr->va_extsize = fa.fsx_extsize;
vattr->va_projid = fa.fsx_projid;
error = xfs_setattr(ip, vattr, attr_flags, NULL);
if (likely(!error))
vn_revalidate(XFS_ITOV(ip)); /* update flags */
error = -error;
break;
}
case XFS_IOC_GETXFLAGS: {
flags = xfs_di2lxflags(ip->i_d.di_flags);
if (copy_to_user(arg, &flags, sizeof(flags)))
error = -EFAULT;
break;
}
case XFS_IOC_SETXFLAGS: {
if (copy_from_user(&flags, arg, sizeof(flags))) {
error = -EFAULT;
break;
}
if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
FS_NOATIME_FL | FS_NODUMP_FL | \
FS_SYNC_FL)) {
error = -EOPNOTSUPP;
break;
}
attr_flags = 0;
if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
attr_flags |= ATTR_NONBLOCK;
vattr->va_mask = XFS_AT_XFLAGS;
vattr->va_xflags = xfs_merge_ioc_xflags(flags,
xfs_ip2xflags(ip));
error = xfs_setattr(ip, vattr, attr_flags, NULL);
if (likely(!error))
vn_revalidate(XFS_ITOV(ip)); /* update flags */
error = -error;
break;
}
default:
error = -ENOTTY;
break;
}
kfree(vattr);
return error;
}
STATIC int
xfs_ioc_getbmap(
struct xfs_inode *ip,
int ioflags,
unsigned int cmd,
void __user *arg)
{
struct getbmap bm;
int iflags;
int error;
if (copy_from_user(&bm, 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 (ioflags & IO_INVIS)
iflags |= BMV_IF_NO_DMAPI_READ;
error = xfs_getbmap(ip, &bm, (struct getbmap __user *)arg+1, iflags);
if (error)
return -error;
if (copy_to_user(arg, &bm, sizeof(bm)))
return -XFS_ERROR(EFAULT);
return 0;
}
STATIC int
xfs_ioc_getbmapx(
struct xfs_inode *ip,
void __user *arg)
{
struct getbmapx bmx;
struct getbmap bm;
int iflags;
int error;
if (copy_from_user(&bmx, 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(ip, &bm, (struct getbmapx __user *)arg+1, iflags);
if (error)
return -error;
GETBMAP_CONVERT(bm, bmx);
if (copy_to_user(arg, &bmx, sizeof(bmx)))
return -XFS_ERROR(EFAULT);
return 0;
}
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