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fs/xfs: Support that ioctl(SETXFLAGS/GETXFLAGS) can set/get inode DAX on XFS.

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1) FS_DAX_FL has been introduced by commit b383a73f2b.
2) In future, chattr/lsattr command from e2fsprogs can set/get
   inode DAX on XFS by calling ioctl(SETXFLAGS/GETXFLAGS).

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Xiao Yang 2020-07-28 08:57:21 -07:00 • committed by Darrick J. Wong
parent 0f89edcd8e
commit 818d5a9155
1 changed files with 11 additions and 3 deletions
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14
fs/xfs/xfs_ioctl.c
View file

@ -1075,13 +1075,18 @@ xfs_merge_ioc_xflags(
xflags |= FS_XFLAG_NODUMP;
else
xflags &= ~FS_XFLAG_NODUMP;
if (flags & FS_DAX_FL)
xflags |= FS_XFLAG_DAX;
else
xflags &= ~FS_XFLAG_DAX;
return xflags;
}
STATIC unsigned int
xfs_di2lxflags(
uint16_t di_flags)
uint16_t di_flags,
uint64_t di_flags2)
{
unsigned int flags = 0;
@ -1095,6 +1100,9 @@ xfs_di2lxflags(
flags |= FS_NOATIME_FL;
if (di_flags & XFS_DIFLAG_NODUMP)
flags |= FS_NODUMP_FL;
if (di_flags2 & XFS_DIFLAG2_DAX) {
flags |= FS_DAX_FL;
}
return flags;
}
@ -1565,7 +1573,7 @@ xfs_ioc_getxflags(
{
unsigned int flags;
flags = xfs_di2lxflags(ip->i_d.di_flags);
flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2);
if (copy_to_user(arg, &flags, sizeof(flags)))
return -EFAULT;
return 0;
@ -1588,7 +1596,7 @@ xfs_ioc_setxflags(
if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
FS_NOATIME_FL | FS_NODUMP_FL | \
FS_SYNC_FL))
FS_SYNC_FL | FS_DAX_FL))
return -EOPNOTSUPP;
fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));