linux-kernel - [PATCH v4 10/14] xfs: Do not free EOF blocks for forcealign

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Message-Id: <20240813163638.3751939-11-john.g.garry@oracle.com>
Date: Tue, 13 Aug 2024 16:36:34 +0000
From: John Garry <john.g.garry@...cle.com>
To: chandan.babu@...cle.com, djwong@...nel.org, dchinner@...hat.com,
        hch@....de
Cc: viro@...iv.linux.org.uk, brauner@...nel.org, jack@...e.cz,
        linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, catherine.hoang@...cle.com,
        martin.petersen@...cle.com, John Garry <john.g.garry@...cle.com>
Subject: [PATCH v4 10/14] xfs: Do not free EOF blocks for forcealign

For when forcealign is enabled, we want the EOF to be aligned as well, so
do not free EOF blocks.

Reviewed-by: "Darrick J. Wong" <djwong@...nel.org> #earlier version
Signed-off-by: John Garry <john.g.garry@...cle.com>
---
 fs/xfs/xfs_bmap_util.c |  6 +++---
 fs/xfs/xfs_inode.c     | 12 ++++++++++++
 fs/xfs/xfs_inode.h     |  2 ++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index fe2e2c930975..7a51859eaf84 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -536,9 +536,9 @@ xfs_can_free_eofblocks(
 	 * range supported by the page cache, because the truncation will loop
 	 * forever.
 	 */
-	end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip));
-	if (xfs_inode_has_bigrtalloc(ip))
-		end_fsb = xfs_rtb_roundup_rtx(mp, end_fsb);
+	end_fsb = xfs_inode_roundup_alloc_unit(ip,
+			XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip)));
+
 	last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
 	if (last_fsb <= end_fsb)
 		return false;
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 5af12f35062d..94ab3f4d6cef 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3129,6 +3129,18 @@ xfs_inode_alloc_unitsize(
 	return XFS_FSB_TO_B(ip->i_mount, xfs_inode_alloc_fsbsize(ip));
 }
 
+xfs_fileoff_t
+xfs_inode_roundup_alloc_unit(
+	struct xfs_inode	*ip,
+	xfs_fileoff_t		offset)
+{
+	unsigned int		rounding = xfs_inode_alloc_fsbsize(ip);
+
+	if (rounding == 1)
+		return offset;
+	return roundup_64(offset, rounding);
+}
+
 /* Should we always be using copy on write for file writes? */
 bool
 xfs_is_always_cow_inode(
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 158afad8c7a4..71acddb8061d 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -643,6 +643,8 @@ void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
 		xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
 unsigned int xfs_inode_alloc_fsbsize(struct xfs_inode *ip);
 unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);
+xfs_fileoff_t xfs_inode_roundup_alloc_unit(struct xfs_inode *ip,
+		xfs_fileoff_t offset);
 
 int xfs_icreate_dqalloc(const struct xfs_icreate_args *args,
 		struct xfs_dquot **udqpp, struct xfs_dquot **gdqpp,
-- 
2.31.1