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xfs: rename XFS_REFC_COW_START to _COWFLAG

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We've been (ab)using XFS_REFC_COW_START as both an integer quantity and
a bit flag, even though it's *only* a bit flag.  Rename the variable to
reflect its nature and update the cast target since we're not supposed
to be comparing it to xfs_agblock_t now.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2022-10-10 11:13:20 -07:00
parent c1ccf967bf
commit 8b972158af
3 changed files with 6 additions and 6 deletions
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2
fs/xfs/libxfs/xfs_format.h
View File

@ -1612,7 +1612,7 @@ unsigned int xfs_refc_block(struct xfs_mount *mp);
* on the startblock. This speeds up mount time deletion of stale
* staging extents because they're all at the right side of the tree.
*/
#define XFS_REFC_COW_START ((xfs_agblock_t)(1U << 31))
#define XFS_REFC_COWFLAG (1U << 31)
#define REFCNTBT_COWFLAG_BITLEN 1
#define REFCNTBT_AGBLOCK_BITLEN 31

6
fs/xfs/libxfs/xfs_refcount.c
View File

@ -108,8 +108,8 @@ xfs_refcount_btrec_to_irec(
uint32_t start;
start = be32_to_cpu(rec->refc.rc_startblock);
if (start & XFS_REFC_COW_START) {
start &= ~XFS_REFC_COW_START;
if (start & XFS_REFC_COWFLAG) {
start &= ~XFS_REFC_COWFLAG;
irec->rc_domain = XFS_REFC_DOMAIN_COW;
} else {
irec->rc_domain = XFS_REFC_DOMAIN_SHARED;
@ -1799,7 +1799,7 @@ xfs_refcount_recover_cow_leftovers(
int error;
/* reflink filesystems mustn't have AGs larger than 2^31-1 blocks */
BUILD_BUG_ON(XFS_MAX_CRC_AG_BLOCKS >= XFS_REFC_COW_START);
BUILD_BUG_ON(XFS_MAX_CRC_AG_BLOCKS >= XFS_REFC_COWFLAG);
if (mp->m_sb.sb_agblocks > XFS_MAX_CRC_AG_BLOCKS)
return -EOPNOTSUPP;

4
fs/xfs/libxfs/xfs_refcount.h
View File

@ -34,9 +34,9 @@ xfs_refcount_encode_startblock(
* query functions (which set rc_domain == -1U), so we check that the
* domain is /not/ shared.
*/
start = startblock & ~XFS_REFC_COW_START;
start = startblock & ~XFS_REFC_COWFLAG;
if (domain != XFS_REFC_DOMAIN_SHARED)
start |= XFS_REFC_COW_START;
start |= XFS_REFC_COWFLAG;
return start;
}