automount: implement automount unit type

1 files changed, 229 insertions, 0 deletions

diff --git a/linux/auto_dev-ioctl.h b/linux/auto_dev-ioctl.h
new file mode 100644
index 0000000000..850f39b33e
--- /dev/null
+++ b/linux/auto_dev-ioctl.h
@@ -0,0 +1,229 @@
+/*
+ * Copyright 2008 Red Hat, Inc. All rights reserved.
+ * Copyright 2008 Ian Kent <raven@themaw.net>
+ *
+ * This file is part of the Linux kernel and is made available under
+ * the terms of the GNU General Public License, version 2, or at your
+ * option, any later version, incorporated herein by reference.
+ */
+
+#ifndef _LINUX_AUTO_DEV_IOCTL_H
+#define _LINUX_AUTO_DEV_IOCTL_H
+
+#include <linux/auto_fs.h>
+
+#ifdef __KERNEL__
+#include <linux/string.h>
+#else
+#include <string.h>
+#endif /* __KERNEL__ */
+
+#define AUTOFS_DEVICE_NAME		"autofs"
+
+#define AUTOFS_DEV_IOCTL_VERSION_MAJOR	1
+#define AUTOFS_DEV_IOCTL_VERSION_MINOR	0
+
+#define AUTOFS_DEVID_LEN		16
+
+#define AUTOFS_DEV_IOCTL_SIZE		sizeof(struct autofs_dev_ioctl)
+
+/*
+ * An ioctl interface for autofs mount point control.
+ */
+
+struct args_protover {
+	__u32	version;
+};
+
+struct args_protosubver {
+	__u32	sub_version;
+};
+
+struct args_openmount {
+	__u32	devid;
+};
+
+struct args_ready {
+	__u32	token;
+};
+
+struct args_fail {
+	__u32	token;
+	__s32	status;
+};
+
+struct args_setpipefd {
+	__s32	pipefd;
+};
+
+struct args_timeout {
+	__u64	timeout;
+};
+
+struct args_requester {
+	__u32	uid;
+	__u32	gid;
+};
+
+struct args_expire {
+	__u32	how;
+};
+
+struct args_askumount {
+	__u32	may_umount;
+};
+
+struct args_ismountpoint {
+	union {
+		struct args_in {
+			__u32	type;
+		} in;
+		struct args_out {
+			__u32	devid;
+			__u32	magic;
+		} out;
+	};
+};
+
+/*
+ * All the ioctls use this structure.
+ * When sending a path size must account for the total length
+ * of the chunk of memory otherwise is is the size of the
+ * structure.
+ */
+
+struct autofs_dev_ioctl {
+	__u32 ver_major;
+	__u32 ver_minor;
+	__u32 size;		/* total size of data passed in
+				 * including this struct */
+	__s32 ioctlfd;		/* automount command fd */
+
+	/* Command parameters */
+
+	union {
+		struct args_protover		protover;
+		struct args_protosubver		protosubver;
+		struct args_openmount		openmount;
+		struct args_ready		ready;
+		struct args_fail		fail;
+		struct args_setpipefd		setpipefd;
+		struct args_timeout		timeout;
+		struct args_requester		requester;
+		struct args_expire		expire;
+		struct args_askumount		askumount;
+		struct args_ismountpoint	ismountpoint;
+	};
+
+	char path[0];
+};
+
+static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
+{
+	memset(in, 0, sizeof(struct autofs_dev_ioctl));
+	in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
+	in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
+	in->size = sizeof(struct autofs_dev_ioctl);
+	in->ioctlfd = -1;
+	return;
+}
+
+/*
+ * If you change this make sure you make the corresponding change
+ * to autofs-dev-ioctl.c:lookup_ioctl()
+ */
+enum {
+	/* Get various version info */
+	AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
+	AUTOFS_DEV_IOCTL_PROTOVER_CMD,
+	AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
+
+	/* Open mount ioctl fd */
+	AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
+
+	/* Close mount ioctl fd */
+	AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
+
+	/* Mount/expire status returns */
+	AUTOFS_DEV_IOCTL_READY_CMD,
+	AUTOFS_DEV_IOCTL_FAIL_CMD,
+
+	/* Activate/deactivate autofs mount */
+	AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
+	AUTOFS_DEV_IOCTL_CATATONIC_CMD,
+
+	/* Expiry timeout */
+	AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
+
+	/* Get mount last requesting uid and gid */
+	AUTOFS_DEV_IOCTL_REQUESTER_CMD,
+
+	/* Check for eligible expire candidates */
+	AUTOFS_DEV_IOCTL_EXPIRE_CMD,
+
+	/* Request busy status */
+	AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
+
+	/* Check if path is a mountpoint */
+	AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
+};
+
+#define AUTOFS_IOCTL 0x93
+
+#define AUTOFS_DEV_IOCTL_VERSION \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_PROTOVER \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_PROTOSUBVER \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_OPENMOUNT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_READY \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_FAIL \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_SETPIPEFD \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_CATATONIC \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_TIMEOUT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_REQUESTER \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_EXPIRE \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_ASKUMOUNT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
+
+#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
+	_IOWR(AUTOFS_IOCTL, \
+	      AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
+
+#endif	/* _LINUX_AUTO_DEV_IOCTL_H */