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authorMiklos Szeredi <miklos@szeredi.hu>2008-07-31 15:41:58 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2008-10-23 13:13:25 +0400
commitf696a3659fc4b3a3bf4bc83d9dbec5e5a2ffd929 (patch)
tree738adf557608f26e881a710839de12b7527549b6 /fs/coda
parent5cec56deb6d41b5b570306b17cd0b1590ebd0897 (diff)
downloadlinux-f696a3659fc4b3a3bf4bc83d9dbec5e5a2ffd929.tar.xz
[PATCH] move executable checking into ->permission()
For execute permission on a regular files we need to check if file has any execute bits at all, regardless of capabilites. This check is normally performed by generic_permission() but was also added to the case when the filesystem defines its own ->permission() method. In the latter case the filesystem should be responsible for performing this check. Move the check from inode_permission() inside filesystems which are not calling generic_permission(). Create a helper function execute_ok() that returns true if the inode is a directory or if any execute bits are present in i_mode. Also fix up the following code: - coda control file is never executable - sysctl files are never executable - hfs_permission seems broken on MAY_EXEC, remove - hfsplus_permission is eqivalent to generic_permission(), remove Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/coda')
-rw-r--r--fs/coda/dir.c3
-rw-r--r--fs/coda/pioctl.c2
2 files changed, 4 insertions, 1 deletions
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index c5916228243c..75b1fa90b2cb 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -146,6 +146,9 @@ int coda_permission(struct inode *inode, int mask)
if (!mask)
return 0;
+ if ((mask & MAY_EXEC) && !execute_ok(inode))
+ return -EACCES;
+
lock_kernel();
if (coda_cache_check(inode, mask))
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index c51365422aa8..773f2ce9aa06 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -43,7 +43,7 @@ const struct file_operations coda_ioctl_operations = {
/* the coda pioctl inode ops */
static int coda_ioctl_permission(struct inode *inode, int mask)
{
- return 0;
+ return (mask & MAY_EXEC) ? -EACCES : 0;
}
static int coda_pioctl(struct inode * inode, struct file * filp,