* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <linux/gfp.h>
#include <linux/stddef.h>
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/compiler.h>
#define KMOD_PATH_LEN 256
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
/* modprobe exit status on success, -ve on error. Return value
* usually useless though. */
-extern int request_module(const char * name, ...) __attribute__ ((format (printf, 1, 2)));
+extern int __request_module(bool wait, const char *name, ...) \
+ __attribute__((format(printf, 2, 3)));
+#define request_module(mod...) __request_module(true, mod)
+#define request_module_nowait(mod...) __request_module(false, mod)
+#define try_then_request_module(x, mod...) \
+ ((x) ?: (__request_module(true, mod), (x)))
#else
-static inline int request_module(const char * name, ...) { return -ENOSYS; }
+static inline int request_module(const char *name, ...) { return -ENOSYS; }
+static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; }
+#define try_then_request_module(x, mod...) (x)
#endif
-#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, gfp_t gfp_mask);
+
+/* 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, enum umh_wait wait)
+{
+ struct subprocess_info *info;
+ gfp_t gfp_mask = (wait == UMH_NO_WAIT) ? GFP_ATOMIC : GFP_KERNEL;
+
+ info = call_usermodehelper_setup(path, argv, envp, gfp_mask);
+ if (info == NULL)
+ return -ENOMEM;
+ return call_usermodehelper_exec(info, wait);
+}
static inline int
-call_usermodehelper(char *path, char **argv, char **envp, int wait)
+call_usermodehelper_keys(char *path, char **argv, char **envp,
+ struct key *session_keyring, enum umh_wait wait)
{
- return call_usermodehelper_keys(path, argv, envp, NULL, wait);
+ struct subprocess_info *info;
+ gfp_t gfp_mask = (wait == UMH_NO_WAIT) ? GFP_ATOMIC : GFP_KERNEL;
+
+ info = call_usermodehelper_setup(path, argv, envp, gfp_mask);
+ if (info == NULL)
+ return -ENOMEM;
+
+ call_usermodehelper_setkeys(info, session_keyring);
+ return call_usermodehelper_exec(info, wait);
}
extern void usermodehelper_init(void);
+struct file;
+extern int call_usermodehelper_pipe(char *path, char *argv[], char *envp[],
+ struct file **filp);
+
+extern int usermodehelper_disable(void);
+extern void usermodehelper_enable(void);
+
#endif /* __LINUX_KMOD_H__ */