1 files changed, 48 insertions, 4 deletions

diff --git a/include/linux/kmod.h b/include/linux/kmod.h
index 10f505c8431d..5dc13848891b 100644
--- a/include/linux/kmod.h
+++ b/include/linux/kmod.h
@@ -36,13 +36,57 @@ static inline int request_module(const char * name, ...) { return -ENOSYS; }
 #define try_then_request_module(x, mod...) ((x) ?: (request_module(mod), (x)))
 
 struct key;
-extern int call_usermodehelper_keys(char *path, char *argv[], char *envp[],
-                                    struct key *session_keyring, int wait);
+struct file;
+struct subprocess_info;
+
+/* Allocate a subprocess_info structure */
+struct subprocess_info *call_usermodehelper_setup(char *path,
+                                                  char **argv, char **envp);
+
+/* Set various pieces of state into the subprocess_info structure */
+void call_usermodehelper_setkeys(struct subprocess_info *info,
+                                 struct key *session_keyring);
+int call_usermodehelper_stdinpipe(struct subprocess_info *sub_info,
+                                  struct file **filp);
+void call_usermodehelper_setcleanup(struct subprocess_info *info,
+                                    void (*cleanup)(char **argv, char **envp));
+
+enum umh_wait {
+        UMH_NO_WAIT = -1,       /* don't wait at all */
+        UMH_WAIT_EXEC = 0,      /* wait for the exec, but not the process */
+        UMH_WAIT_PROC = 1,      /* wait for the process to complete */
+};
+
+/* Actually execute the sub-process */
+int call_usermodehelper_exec(struct subprocess_info *info, enum umh_wait wait);
+
+/* Free the subprocess_info. This is only needed if you're not going
+   to call call_usermodehelper_exec */
+void call_usermodehelper_freeinfo(struct subprocess_info *info);
 
 static inline int
-call_usermodehelper(char *path, char **argv, char **envp, int wait)
+call_usermodehelper(char *path, char **argv, char **envp, enum umh_wait wait)
 {
-        return call_usermodehelper_keys(path, argv, envp, NULL, wait);
+        struct subprocess_info *info;
+
+        info = call_usermodehelper_setup(path, argv, envp);
+        if (info == NULL)
+                return -ENOMEM;
+        return call_usermodehelper_exec(info, wait);
+}
+
+static inline int
+call_usermodehelper_keys(char *path, char **argv, char **envp,
+                         struct key *session_keyring, enum umh_wait wait)
+{
+        struct subprocess_info *info;
+
+        info = call_usermodehelper_setup(path, argv, envp);
+        if (info == NULL)
+                return -ENOMEM;
+
+        call_usermodehelper_setkeys(info, session_keyring);
+        return call_usermodehelper_exec(info, wait);
 }
 
 extern void usermodehelper_init(void);