linux-ext4 - [PATCH 20/22] fuse2fs: set iomap-related inode flags

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Message-ID: <175279461395.715479.7477289872117738395.stgit@frogsfrogsfrogs>
Date: Thu, 17 Jul 2025 16:44:35 -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 20/22] fuse2fs: set iomap-related inode flags

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

Set FUSE_IFLAG_* when we do a getattr, so that all files will have iomap
enabled.

Signed-off-by: "Darrick J. Wong" <djwong@...nel.org>
---
 misc/fuse2fs.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index c21a95b6920d5c..e71fcbaeeaf0c6 100644
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -1571,6 +1571,25 @@ static int op_getattr(const char *path, struct stat *statbuf
 	return ret;
 }

+#ifdef HAVE_FUSE_IOMAP
+static int op_getattr_iflags(const char *path, struct stat *statbuf,
+			     unsigned int *iflags, struct fuse_file_info *fi)
+{
+	struct fuse_context *ctxt = fuse_get_context();
+	struct fuse2fs *ff = (struct fuse2fs *)ctxt->private_data;
+	int ret = op_getattr(path, statbuf, fi);
+
+	if (ret)
+		return ret;
+
+	if (fuse2fs_iomap_does_fileio(ff))
+		*iflags |= FUSE_IFLAG_IOMAP_DIRECTIO | FUSE_IFLAG_IOMAP_FILEIO;
+
+	return 0;
+}
+#endif
+
+
 static int op_readlink(const char *path, char *buf, size_t len)
 {
 	struct fuse_context *ctxt = fuse_get_context();
@@ -6178,6 +6197,7 @@ static struct fuse_operations fs_ops = {
 	.iomap_end = op_iomap_end,
 	.iomap_config = op_iomap_config,
 	.iomap_ioend = op_iomap_ioend,
+	.getattr_iflags = op_getattr_iflags,
 #endif /* HAVE_FUSE_IOMAP */
 };