linux-ext4 - [PATCH 3/8] ext4 crypto: make sure the encryption info is initialized on opendir(2)

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Message-Id: <1432856867-5710-3-git-send-email-tytso@mit.edu>
Date:	Thu, 28 May 2015 19:47:42 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	jaegeuk@...nel.org, mhalcrow@...gle.com,
	Theodore Ts'o <tytso@....edu>
Subject: [PATCH 3/8] ext4 crypto: make sure the encryption info is initialized on opendir(2)

Signed-off-by: Theodore Ts'o <tytso@....edu>
---
 fs/ext4/dir.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index e11e6ae..f9e1491 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -593,6 +593,13 @@ finished:
 	return 0;
 }
 
+static int ext4_dir_open(struct inode * inode, struct file * filp)
+{
+	if (ext4_encrypted_inode(inode))
+		return ext4_get_encryption_info(inode) ? -EACCES : 0;
+	return 0;
+}
+
 static int ext4_release_dir(struct inode *inode, struct file *filp)
 {
 	if (filp->private_data)
@@ -635,5 +642,6 @@ 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,
 };
-- 
2.3.0

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