[Cluster-devel] [PATCH 27/58] [GFS2] remove unnecessary permission checks

[swhiteho at redhat.com]

From: Ryan O'Hara <rohara at redhat.com>

Remove read/write permission() checks from xattr operations.
VFS layer is already handling permission for xattrs via the
xattr_permission() call, so there is no need for gfs2 to
check permissions. Futhermore, using permission() for SELinux
xattrs ops is incorrect.

Signed-off-by: Ryan O'Hara <rohara at redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho at redhat.com>

diff --git a/fs/gfs2/eaops.c b/fs/gfs2/eaops.c
index aa8dbf3..ef91b6e 100644
--- a/fs/gfs2/eaops.c
+++ b/fs/gfs2/eaops.c
@@ -59,9 +59,6 @@ unsigned int gfs2_ea_name2type(const char *name, const char **truncated_name)
 static int user_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 {
 	struct inode *inode = &ip->i_inode;
-	int error = permission(inode, MAY_READ, NULL);
-	if (error)
-		return error;
 
 	return gfs2_ea_get_i(ip, er);
 }
@@ -70,14 +67,6 @@ static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 {
 	struct inode *inode = &ip->i_inode;
 
-	if (S_ISREG(inode->i_mode) ||
-	    (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
-		int error = permission(inode, MAY_WRITE, NULL);
-		if (error)
-			return error;
-	} else
-		return -EPERM;
-
 	return gfs2_ea_set_i(ip, er);
 }
 
@@ -85,14 +74,6 @@ static int user_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 {
 	struct inode *inode = &ip->i_inode;
 
-	if (S_ISREG(inode->i_mode) ||
-	    (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
-		int error = permission(inode, MAY_WRITE, NULL);
-		if (error)
-			return error;
-	} else
-		return -EPERM;
-
 	return gfs2_ea_remove_i(ip, er);
 }
 
@@ -108,8 +89,6 @@ static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 	     GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
 		return -EOPNOTSUPP;
 
-
-
 	return gfs2_ea_get_i(ip, er);
 }
 
@@ -173,9 +152,6 @@ static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 static int security_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 {
 	struct inode *inode = &ip->i_inode;
-	int error = permission(inode, MAY_READ, NULL);
-	if (error)
-		return error;
 
 	return gfs2_ea_get_i(ip, er);
 }
@@ -183,9 +159,6 @@ static int security_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 static int security_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 {
 	struct inode *inode = &ip->i_inode;
-	int error = permission(inode, MAY_WRITE, NULL);
-	if (error)
-		return error;
 
 	return gfs2_ea_set_i(ip, er);
 }
@@ -193,9 +166,6 @@ static int security_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 static int security_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 {
 	struct inode *inode = &ip->i_inode;
-	int error = permission(inode, MAY_WRITE, NULL);
-	if (error)
-		return error;
 
 	return gfs2_ea_remove_i(ip, er);
 }
-- 
1.5.1.2