linux-ext4 - [PATCH 11/16] fuse2fs: support changing newer iflags

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Message-ID: <174553065123.1160461.3149004980436873980.stgit@frogsfrogsfrogs>
Date: Thu, 24 Apr 2025 14:43:39 -0700
From: "Darrick J. Wong" <djwong@...nel.org>
To: tytso@....edu
Cc: linux-ext4@...r.kernel.org
Subject: [PATCH 11/16] fuse2fs: support changing newer iflags

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

Redefine FUSE2FS_MODIFIABLE_IFLAGS so that userspace can modify any
flags that the kernel can, except for the ones that fuse2fs lacks the
ability to change.

Signed-off-by: "Darrick J. Wong" <djwong@...nel.org>
---
 misc/fuse2fs.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index 6066984fa7f6e0..2220da4c3e8f64 100644
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -2954,9 +2954,8 @@ static int op_utimens(const char *path, const struct timespec ctv[2]
 }

 #define FUSE2FS_MODIFIABLE_IFLAGS \
-	(EXT2_IMMUTABLE_FL | EXT2_APPEND_FL | EXT2_NODUMP_FL | \
-	 EXT2_NOATIME_FL | EXT3_JOURNAL_DATA_FL | EXT2_DIRSYNC_FL | \
-	 EXT2_TOPDIR_FL)
+	(EXT2_FL_USER_MODIFIABLE & ~(EXT4_EXTENTS_FL | EXT4_CASEFOLD_FL | \
+				     EXT3_JOURNAL_DATA_FL))

 static inline int set_iflags(struct ext2_inode_large *inode, __u32 iflags)
 {