Commit bb69e8a2 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Greg Kroah-Hartman

xfs: don't set v3 xflags for v2 inodes

commit dd60687e upstream.

Reject attempts to set XFLAGS that correspond to di_flags2 inode flags
if the inode isn't a v3 inode, because di_flags2 only exists on v3.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f46a61f6
......@@ -928,16 +928,15 @@ xfs_ioc_fsgetxattr(
return 0;
}
STATIC void
xfs_set_diflags(
STATIC uint16_t
xfs_flags2diflags(
struct xfs_inode *ip,
unsigned int xflags)
{
unsigned int di_flags;
uint64_t di_flags2;
/* can't set PREALLOC this way, just preserve it */
di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
uint16_t di_flags =
(ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
if (xflags & FS_XFLAG_IMMUTABLE)
di_flags |= XFS_DIFLAG_IMMUTABLE;
if (xflags & FS_XFLAG_APPEND)
......@@ -967,19 +966,24 @@ xfs_set_diflags(
if (xflags & FS_XFLAG_EXTSIZE)
di_flags |= XFS_DIFLAG_EXTSIZE;
}
ip->i_d.di_flags = di_flags;
/* diflags2 only valid for v3 inodes. */
if (ip->i_d.di_version < 3)
return;
return di_flags;
}
STATIC uint64_t
xfs_flags2diflags2(
struct xfs_inode *ip,
unsigned int xflags)
{
uint64_t di_flags2 =
(ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
if (xflags & FS_XFLAG_DAX)
di_flags2 |= XFS_DIFLAG2_DAX;
if (xflags & FS_XFLAG_COWEXTSIZE)
di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
ip->i_d.di_flags2 = di_flags2;
return di_flags2;
}
STATIC void
......@@ -1020,6 +1024,7 @@ xfs_ioctl_setattr_xflags(
struct fsxattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
uint64_t di_flags2;
/* Can't change realtime flag if any extents are allocated. */
if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
......@@ -1050,7 +1055,14 @@ xfs_ioctl_setattr_xflags(
!capable(CAP_LINUX_IMMUTABLE))
return -EPERM;
xfs_set_diflags(ip, fa->fsx_xflags);
/* diflags2 only valid for v3 inodes. */
di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
if (di_flags2 && ip->i_d.di_version < 3)
return -EINVAL;
ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
ip->i_d.di_flags2 = di_flags2;
xfs_diflags_to_linux(ip);
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
......
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