linux-kernel - [PATCH 11/29] ubifs: Implement directory open operation

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Message-Id: <1479072072-6844-12-git-send-email-richard@nod.at>
Date:   Sun, 13 Nov 2016 22:20:54 +0100
From:   Richard Weinberger <richard@....at>
To:     linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        dedekind1@...il.com, adrian.hunter@...el.com, tytso@....edu,
        jaegeuk@...nel.org, david@...ma-star.at, wd@...x.de,
        sbabic@...x.de, dengler@...utronix.de, ebiggers@...gle.com,
        mhalcrow@...gle.com, hch@...radead.org,
        Richard Weinberger <richard@....at>
Subject: [PATCH 11/29] ubifs: Implement directory open operation

We need the ->open() hook to load the crypto context
which is needed for all crypto operations within that
directory.

Signed-off-by: Richard Weinberger <richard@....at>
---
 fs/ubifs/dir.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 2315cb864c39..477817567971 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1410,6 +1410,14 @@ int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 	return 0;
 }
 
+static int ubifs_dir_open(struct inode *dir, struct file *file)
+{
+	if (ubifs_crypt_is_encrypted(dir))
+		return fscrypt_get_encryption_info(dir) ? -EACCES : 0;
+
+	return 0;
+}
+
 const struct inode_operations ubifs_dir_inode_operations = {
 	.lookup      = ubifs_lookup,
 	.create      = ubifs_create,
@@ -1436,6 +1444,7 @@ const struct file_operations ubifs_dir_operations = {
 	.iterate_shared = ubifs_readdir,
 	.fsync          = ubifs_fsync,
 	.unlocked_ioctl = ubifs_ioctl,
+	.open		= ubifs_dir_open,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl   = ubifs_compat_ioctl,
 #endif
-- 
2.7.3