linux-kernel - [PATCH v2 08/13] xfs: Do not free EOF blocks for forcealign

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240705162450.3481169-9-john.g.garry@oracle.com>
Date: Fri,  5 Jul 2024 16:24:45 +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 v2 08/13] 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>
Signed-off-by: John Garry <john.g.garry@...cle.com>
---
 fs/xfs/xfs_bmap_util.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index fe2e2c930975..b9f8093ae78c 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -537,8 +537,13 @@ xfs_can_free_eofblocks(
 	 * forever.
 	 */
 	end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip));
-	if (xfs_inode_has_bigrtalloc(ip))
+
+	/* Only try to free beyond the allocation unit that crosses EOF */
+	if (xfs_inode_has_forcealign(ip))
+		end_fsb = roundup_64(end_fsb, ip->i_extsize);
+	else if (xfs_inode_has_bigrtalloc(ip))
 		end_fsb = xfs_rtb_roundup_rtx(mp, end_fsb);
+
 	last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
 	if (last_fsb <= end_fsb)
 		return false;
-- 
2.31.1