linux-ext4 - [PATCH 1/9] ext4: remove ext4_dir

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Date:   Tue, 24 Nov 2020 16:23:28 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-fscrypt@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-mtd@...ts.infradead.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 1/9] ext4: remove ext4_dir_open()

From: Eric Biggers <ebiggers@...gle.com>

Since encrypted directories can be opened without their encryption key
being available, and each readdir tries to set up the key, trying to set
up the key in ->open() too isn't really useful.

Just remove it so that directories don't need an ->open() method
anymore, and so that we eliminate a use of fscrypt_get_encryption_info()
(which I'd like to stop exporting to filesystems).

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 fs/ext4/dir.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index ca50c90adc4c..16bfbdd5007c 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -616,13 +616,6 @@ static int ext4_dx_readdir(struct file *file, struct dir_context *ctx)
 	return 0;
 }
 
-static int ext4_dir_open(struct inode * inode, struct file * filp)
-{
-	if (IS_ENCRYPTED(inode))
-		return fscrypt_get_encryption_info(inode) ? -EACCES : 0;
-	return 0;
-}
-
 static int ext4_release_dir(struct inode *inode, struct file *filp)
 {
 	if (filp->private_data)
@@ -664,7 +657,6 @@ const struct file_operations ext4_dir_operations = {
 	.compat_ioctl	= ext4_compat_ioctl,
 #endif
 	.fsync		= ext4_sync_file,
-	.open		= ext4_dir_open,
 	.release	= ext4_release_dir,
 };
 
-- 
2.29.2