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fs/xfs: Combine xfs_diflags_to_linux() and xfs_diflags_to_iflags() 

The functionality in xfs_diflags_to_linux() and xfs_diflags_to_iflags() are
nearly identical.  The only difference is that *_to_linux() is called after
inode setup and disallows changing the DAX flag.

Combining them can be done with a flag which indicates if this is the initial
setup to allow the DAX flag to be properly set only at init time.

So remove xfs_diflags_to_linux() and call the modified xfs_diflags_to_iflags()
directly.

While we are here simplify xfs_diflags_to_iflags() to take struct xfs_inode and
use xfs_ip2xflags() to ensure future diflags are included correctly.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Ira Weiny 2020-05-04 09:02:43 -07:00 committed by Darrick J. Wong
parent 32dbc5655f
commit 840d493dff
3 changed files with 27 additions and 49 deletions
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1
fs/xfs/xfs_inode.h
View File

@ -467,6 +467,7 @@ int xfs_break_layouts(struct inode *inode, uint *iolock,
/* from xfs_iops.c */
extern void xfs_setup_inode(struct xfs_inode *ip);
extern void xfs_setup_iops(struct xfs_inode *ip);
extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
/*
* When setting up a newly allocated inode, we need to call

33
fs/xfs/xfs_ioctl.c
View File

@ -1201,37 +1201,6 @@ xfs_flags2diflags2(
return di_flags2;
}
STATIC void
xfs_diflags_to_linux(
struct xfs_inode *ip)
{
struct inode *inode = VFS_I(ip);
unsigned int xflags = xfs_ip2xflags(ip);
if (xflags & FS_XFLAG_IMMUTABLE)
inode->i_flags |= S_IMMUTABLE;
else
inode->i_flags &= ~S_IMMUTABLE;
if (xflags & FS_XFLAG_APPEND)
inode->i_flags |= S_APPEND;
else
inode->i_flags &= ~S_APPEND;
if (xflags & FS_XFLAG_SYNC)
inode->i_flags |= S_SYNC;
else
inode->i_flags &= ~S_SYNC;
if (xflags & FS_XFLAG_NOATIME)
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
#if 0 /* disabled until the flag switching races are sorted out */
if (xflags & FS_XFLAG_DAX)
inode->i_flags |= S_DAX;
else
inode->i_flags &= ~S_DAX;
#endif
}
static int
xfs_ioctl_setattr_xflags(
struct xfs_trans *tp,
@ -1269,7 +1238,7 @@ xfs_ioctl_setattr_xflags(
ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
ip->i_d.di_flags2 = di_flags2;
xfs_diflags_to_linux(ip);
xfs_diflags_to_iflags(ip, false);
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
XFS_STATS_INC(mp, xs_ig_attrchg);

42
fs/xfs/xfs_iops.c
View File

@ -1271,26 +1271,34 @@ xfs_inode_should_enable_dax(
return false;
}
STATIC void
void
xfs_diflags_to_iflags(
struct inode *inode,
struct xfs_inode *ip)
struct xfs_inode *ip,
bool init)
{
uint16_t flags = ip->i_d.di_flags;
struct inode *inode = VFS_I(ip);
unsigned int xflags = xfs_ip2xflags(ip);
unsigned int flags = 0;
inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
S_NOATIME | S_DAX);
ASSERT(!(IS_DAX(inode) && init));
if (flags & XFS_DIFLAG_IMMUTABLE)
inode->i_flags |= S_IMMUTABLE;
if (flags & XFS_DIFLAG_APPEND)
inode->i_flags |= S_APPEND;
if (flags & XFS_DIFLAG_SYNC)
inode->i_flags |= S_SYNC;
if (flags & XFS_DIFLAG_NOATIME)
inode->i_flags |= S_NOATIME;
if (xfs_inode_should_enable_dax(ip))
inode->i_flags |= S_DAX;
if (xflags & FS_XFLAG_IMMUTABLE)
flags |= S_IMMUTABLE;
if (xflags & FS_XFLAG_APPEND)
flags |= S_APPEND;
if (xflags & FS_XFLAG_SYNC)
flags |= S_SYNC;
if (xflags & FS_XFLAG_NOATIME)
flags |= S_NOATIME;
if (init && xfs_inode_should_enable_dax(ip))
flags |= S_DAX;
/*
* S_DAX can only be set during inode initialization and is never set by
* the VFS, so we cannot mask off S_DAX in i_flags.
*/
inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | S_NOATIME);
inode->i_flags |= flags;
}
/*
@ -1316,7 +1324,7 @@ xfs_setup_inode(
inode_fake_hash(inode);
i_size_write(inode, ip->i_d.di_size);
xfs_diflags_to_iflags(inode, ip);
xfs_diflags_to_iflags(ip, true);
if (S_ISDIR(inode->i_mode)) {
/*