linux-ext4 - [PATCH 03/10] fuse2fs: let the kernel tell us about acl/mode updates

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Message-ID: <175279461773.716436.5581132815831111781.stgit@frogsfrogsfrogs>
Date: Thu, 17 Jul 2025 16:46:10 -0700
From: "Darrick J. Wong" <djwong@...nel.org>
To: tytso@....edu
Cc: joannelkoong@...il.com, miklos@...redi.hu, John@...ves.net,
 linux-fsdevel@...r.kernel.org, bernd@...ernd.com, linux-ext4@...r.kernel.org,
 neal@...pa.dev
Subject: [PATCH 03/10] fuse2fs: let the kernel tell us about acl/mode updates

From: Darrick J. Wong <djwong@...nel.org>

When the kernel is running in iomap mode, it will also manage all the
ACL updates and the resulting file mode changes for us.  Disable the
manual implementation of it in fuse2fs.

Signed-off-by: "Darrick J. Wong" <djwong@...nel.org>
---
 misc/fuse2fs.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index 5d75cffa8f6bca..e580622d39b1d1 100644
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -1739,7 +1739,7 @@ static int propagate_default_acls(struct fuse2fs *ff, ext2_ino_t parent,
 	size_t deflen;
 	int ret;

-	if (!ff->acl)
+	if (!ff->acl || fuse2fs_iomap_does_fileio(ff))
 		return 0;

 	ret = __getxattr(ff, parent, XATTR_NAME_POSIX_ACL_DEFAULT, &def,
@@ -2999,7 +2999,7 @@ static int op_chmod(const char *path, mode_t mode
 	 * of the user's groups, but FUSE only tells us about the primary
 	 * group.
 	 */
-	if (!is_superuser(ff, ctxt)) {
+	if (!fuse2fs_iomap_does_fileio(ff) && !is_superuser(ff, ctxt)) {
 		ret = in_file_group(ctxt, &inode);
 		if (ret < 0)
 			goto out;