no reason to keep exec_permission() separate now

cache footprint alone makes it a bad idea...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namei.c b/fs/namei.c
index 758bae7..b3c1a97 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -311,43 +311,6 @@ int inode_permission(struct inode *inode, int mask)
 }
 
 /**
- * exec_permission  -  check for right to do lookups in a given directory
- * @inode:     inode to check permission on
- * @mask:      MAY_EXEC and possibly MAY_NOT_BLOCK flags.
- *
- * Short-cut version of inode_permission(), for calling on directories
- * during pathname resolution.  Combines parts of inode_permission()
- * and generic_permission(), and tests ONLY for MAY_EXEC permission.
- *
- * If appropriate, check DAC only.  If not appropriate, or
- * short-cut DAC fails, then call ->permission() to do more
- * complete permission check.
- */
-static inline int exec_permission(struct inode *inode, int mask)
-{
-       int ret;
-       struct user_namespace *ns = inode_userns(inode);
-
-       if (inode->i_op->permission) {
-               ret = inode->i_op->permission(inode, mask);
-               if (likely(!ret))
-                       goto ok;
-       } else {
-               ret = acl_permission_check(inode, mask);
-               if (likely(!ret))
-                       goto ok;
-               if (ret != -EACCES)
-                       return ret;
-               if (ns_capable(ns, CAP_DAC_OVERRIDE) ||
-                               ns_capable(ns, CAP_DAC_READ_SEARCH))
-                       goto ok;
-       }
-       return ret;
-ok:
-       return security_inode_permission(inode, mask);
-}
-
-/**
  * path_get - get a reference to a path
  * @path: path to get the reference to
  *
@@ -1220,13 +1183,13 @@ retry:
 static inline int may_lookup(struct nameidata *nd)
 {
        if (nd->flags & LOOKUP_RCU) {
-               int err = exec_permission(nd->inode, MAY_EXEC|MAY_NOT_BLOCK);
+               int err = inode_permission(nd->inode, MAY_EXEC|MAY_NOT_BLOCK);
                if (err != -ECHILD)
                        return err;
                if (unlazy_walk(nd, NULL))
                        return -ECHILD;
        }
-       return exec_permission(nd->inode, MAY_EXEC);
+       return inode_permission(nd->inode, MAY_EXEC);
 }
 
 static inline int handle_dots(struct nameidata *nd, int type)
@@ -1501,7 +1464,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
                        if (!S_ISDIR(dentry->d_inode->i_mode))
                                goto fput_fail;
 
-                       retval = exec_permission(dentry->d_inode, MAY_EXEC);
+                       retval = inode_permission(dentry->d_inode, MAY_EXEC);
                        if (retval)
                                goto fput_fail;
                }
@@ -1658,7 +1621,7 @@ static struct dentry *__lookup_hash(struct qstr *name,
        struct dentry *dentry;
        int err;
 
-       err = exec_permission(inode, MAY_EXEC);
+       err = inode_permission(inode, MAY_EXEC);
        if (err)
                return ERR_PTR(err);