[PATCH 3/8] remove jfs xattr permission checks

[Christoph Hellwig <hch@lst.de>]

remove checks now in the VFS

Signed-off-by: Christoph Hellwig <hch@lst.de>

Index: linux-2.6/fs/jfs/xattr.c
===================================================================
--- linux-2.6.orig/fs/jfs/xattr.c	2005-10-31 02:30:31.000000000 +0100
+++ linux-2.6/fs/jfs/xattr.c	2005-10-31 02:30:50.000000000 +0100
@@ -758,36 +758,23 @@
 static int can_set_xattr(struct inode *inode, const char *name,
 			 const void *value, size_t value_len)
 {
-	if (IS_RDONLY(inode))
-		return -EROFS;
-
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-		return -EPERM;
-
-	if(strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) == 0)
-		/*
-		 * "system.*"
-		 */
+	if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
 		return can_set_system_xattr(inode, name, value, value_len);
 
-	if(strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0)
-		return (capable(CAP_SYS_ADMIN) ? 0 : -EPERM);
-
-#ifdef CONFIG_JFS_SECURITY
-	if (strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)
-	    == 0)
-		return 0;	/* Leave it to the security module */
-#endif
-		
-	if((strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) != 0) &&
-	   (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) != 0))
+	/*
+	 * Don't allow setting an attribute in an unknown namespace.
+	 */
+	if (strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) &&
+	    strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) &&
+	    strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
+	    strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))
 		return -EOPNOTSUPP;
 
 	if (!S_ISREG(inode->i_mode) &&
 	    (!S_ISDIR(inode->i_mode) || inode->i_mode &S_ISVTX))
 		return -EPERM;
 
-	return permission(inode, MAY_WRITE, NULL);
+	return 0;
 }
 
 int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
@@ -957,22 +944,6 @@
 	return rc;
 }
 
-static int can_get_xattr(struct inode *inode, const char *name)
-{
-#ifdef CONFIG_JFS_SECURITY
-	if(strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0)
-		return 0;
-#endif
-
-	if(strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0)
-		return (capable(CAP_SYS_ADMIN) ? 0 : -EPERM);
-
-	if(strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) == 0)
-		return 0;
-
-	return permission(inode, MAY_READ, NULL);
-}
-
 ssize_t __jfs_getxattr(struct inode *inode, const char *name, void *data,
 		       size_t buf_size)
 {
@@ -983,12 +954,8 @@
 	ssize_t size;
 	int namelen = strlen(name);
 	char *os2name = NULL;
-	int rc;
 	char *value;
 
-	if ((rc = can_get_xattr(inode, name)))
-		return rc;
-
 	if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
 		os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1,
 				  GFP_KERNEL);