[PATCH] extras/multipath update

here is the next update which brings this multipath to the state i'm not
ashamed of it being in udev :)

* drop a libdevmapper copy in extras/multipath; maybe discussions w/
Sistina folks will bring a better solution in the future.
* drop a putchar usage in libdevmapper to compile cleanly with klibc
* drop another such usage of my own in main.c
* massage the Makefile to compile libdevmapper against klibc
* use "ld" to produce the binary rather than "gcc -static"
* stop being stupid w/ uneeded major, minor & dev in main.c:dm_mk_node()
* reverse to creating striped target for now because the multipath
target is more hairy than expected initialy
* push the version code to 009 to be in synch w/ udev

builds & run here.
binary size is 43ko, which is fairly gratifying after all the efforts
I've put to compiling it with klibc :)

1 files changed, 147 insertions, 0 deletions

diff --git a/extras/multipath/libdevmapper/libdevmapper.h b/extras/multipath/libdevmapper/libdevmapper.h
new file mode 100644
index 0000000000..6549af3641
--- /dev/null
+++ b/extras/multipath/libdevmapper/libdevmapper.h
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2001 Sistina Software (UK) Limited.
+ *
+ * This file is released under the LGPL.
+ */
+
+#ifndef LIB_DEVICE_MAPPER_H
+#define LIB_DEVICE_MAPPER_H
+
+#include <inttypes.h>
+#include <sys/types.h>
+
+#ifdef linux
+#  include <linux/types.h>
+#endif
+
+/*
+ * Since it is quite laborious to build the ioctl
+ * arguments for the device-mapper people are
+ * encouraged to use this library.
+ *
+ * You will need to build a struct dm_task for
+ * each ioctl command you want to execute.
+ */
+
+typedef void (*dm_log_fn) (int level, const char *file, int line,
+			   const char *f, ...);
+
+/*
+ * The library user may wish to register their own
+ * logging function, by default errors go to
+ * stderr.
+ */
+void dm_log_init(dm_log_fn fn);
+void dm_log_init_verbose(int level);
+
+enum {
+	DM_DEVICE_CREATE,
+	DM_DEVICE_RELOAD,
+	DM_DEVICE_REMOVE,
+	DM_DEVICE_REMOVE_ALL,
+
+	DM_DEVICE_SUSPEND,
+	DM_DEVICE_RESUME,
+
+	DM_DEVICE_INFO,
+	DM_DEVICE_DEPS,
+	DM_DEVICE_RENAME,
+
+	DM_DEVICE_VERSION,
+
+	DM_DEVICE_STATUS,
+	DM_DEVICE_TABLE,
+	DM_DEVICE_WAITEVENT,
+
+	DM_DEVICE_LIST,
+
+	DM_DEVICE_CLEAR,
+
+	DM_DEVICE_MKNODES
+};
+
+struct dm_task;
+
+struct dm_task *dm_task_create(int type);
+void dm_task_destroy(struct dm_task *dmt);
+
+int dm_task_set_name(struct dm_task *dmt, const char *name);
+int dm_task_set_uuid(struct dm_task *dmt, const char *uuid);
+
+/*
+ * Retrieve attributes after an info.
+ */
+struct dm_info {
+	int exists;
+	int suspended;
+	int live_table;
+	int inactive_table;
+	int32_t open_count;
+	uint32_t event_nr;
+	uint32_t major;
+	uint32_t minor;		/* minor device number */
+	int read_only;		/* 0:read-write; 1:read-only */
+
+	int32_t target_count;
+};
+
+struct dm_deps {
+	uint32_t count;
+	uint32_t filler;
+	uint64_t device[0];
+};
+
+struct dm_names {
+	uint64_t dev;
+	uint32_t next;		/* Offset to next struct from start of this struct */
+	char name[0];
+};
+
+int dm_get_library_version(char *version, size_t size);
+int dm_task_get_driver_version(struct dm_task *dmt, char *version, size_t size);
+int dm_task_get_info(struct dm_task *dmt, struct dm_info *dmi);
+const char *dm_task_get_name(struct dm_task *dmt);
+const char *dm_task_get_uuid(struct dm_task *dmt);
+
+struct dm_deps *dm_task_get_deps(struct dm_task *dmt);
+struct dm_names *dm_task_get_names(struct dm_task *dmt);
+
+int dm_task_set_ro(struct dm_task *dmt);
+int dm_task_set_newname(struct dm_task *dmt, const char *newname);
+int dm_task_set_minor(struct dm_task *dmt, int minor);
+int dm_task_set_major(struct dm_task *dmt, int major);
+int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr);
+
+/*
+ * Use these to prepare for a create or reload.
+ */
+int dm_task_add_target(struct dm_task *dmt,
+		       uint64_t start,
+		       uint64_t size, const char *ttype, const char *params);
+
+/*
+ * Format major/minor numbers correctly for input to driver
+ */
+int dm_format_dev(char *buf, int bufsize, uint32_t dev_major, uint32_t dev_minor);
+
+/* Use this to retrive target information returned from a STATUS call */
+void *dm_get_next_target(struct dm_task *dmt,
+			 void *next, uint64_t *start, uint64_t *length,
+			 char **target_type, char **params);
+
+/*
+ * Call this to actually run the ioctl.
+ */
+int dm_task_run(struct dm_task *dmt);
+
+/*
+ * Configure the device-mapper directory
+ */
+int dm_set_dev_dir(const char *dir);
+const char *dm_dir(void);
+
+/* Release library resources */
+void dm_lib_release(void);
+void dm_lib_exit(void);
+
+#endif				/* LIB_DEVICE_MAPPER_H */