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From 323ef68faf1bbd9b1e66aea268fd09d358d7e8ab Mon Sep 17 00:00:00 2001
From: Andy Whitcroft <apw@canonical.com>
Date: Wed, 16 Feb 2011 04:49:59 +0000
Subject: ecryptfs: read on a directory should return EISDIR if not supported
From: Andy Whitcroft <apw@canonical.com>
commit 323ef68faf1bbd9b1e66aea268fd09d358d7e8ab upstream.
read() calls against a file descriptor connected to a directory are
incorrectly returning EINVAL rather than EISDIR:
[EISDIR]
[XSI] [Option Start] The fildes argument refers to a directory and the
implementation does not allow the directory to be read using read()
or pread(). The readdir() function should be used instead. [Option End]
This occurs because we do not have a .read operation defined for
ecryptfs directories. Connect this up to generic_read_dir().
BugLink: http://bugs.launchpad.net/bugs/719691
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
---
fs/ecryptfs/file.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -323,6 +323,7 @@ ecryptfs_compat_ioctl(struct file *file,
const struct file_operations ecryptfs_dir_fops = {
.readdir = ecryptfs_readdir,
+ .read = generic_read_dir,
.unlocked_ioctl = ecryptfs_unlocked_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ecryptfs_compat_ioctl,
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