[multipathd] DM configuration ground work #2

This patch enables DM configuration at multipathd startup.

To achieve that simple goal, the following steps were necessary :

- new libmultipath/structs_vec.[ch] exporting high level method working
  on [vectored] {path,multipath} structs :
	- set_no_path_retry
	- adopt_paths
	- orphan_paths
	- orphan_path
	- verify_paths
	- update_mpp_paths
	- setup_multipath
	- update_multipath_strings
	- remove_map
	- stop_waiter_thread_func *stop_waiter, int purge_vec);
	- remove_maps
	- add_map_without_path
	- add_map_with_path
- teach coalesce_path() to use add_map_with_path() and verify_paths()
- add a configure() function to the daemon
- teach multipathd to coalesce its map vector after configuration
- multipathd/main.c:reconfigure() restarts the configuration process

Fixed 2 bugs in the implementation from Edward Goggin :

- set mpp wwid before the binded alias lookup so that friendly names
  work
- allocate a mpp->paths in adopt_paths() when mpp->pg is NULL and we
  must store a path there

And fixed one long standing careless bug in all structs.c:find_*().
Being passed a NULL vector shortcuts the lookups now.

1 files changed, 0 insertions, 6 deletions

diff --git a/multipathd/main.h b/multipathd/main.h
index e1c5782..d5fa4b5 100644
--- a/multipathd/main.h
+++ b/multipathd/main.h
@@ -6,12 +6,6 @@
 #define MAPGCINT 5
 #define MAX_CHECKINT CHECKINT << 2
 
-struct vectors {
-	pthread_mutex_t *lock;
-	vector pathvec;
-	vector mpvec;
-};
-
 int reconfigure (struct vectors *);
 int show_paths (char **, int *, struct vectors *);
 int show_maps (char **, int *, struct vectors *);