[dm-devel] [PATCH 11/21] libmultipath: add global variable for current bindings

[mwilck]

From: Martin Wilck <mwi...@suse.com>

Add a variable global_bindings that holds the currently active vector of
bindings. This variable is freed at program exit.

Signed-off-by: Martin Wilck <mwi...@suse.com>
---
 libmultipath/alias.c              | 11 +++++++++--
 libmultipath/alias.h              |  1 +
 libmultipath/libmultipath.version |  1 +
 multipath/main.c                  |  2 ++
 multipathd/main.c                 |  1 +
 5 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/libmultipath/alias.c b/libmultipath/alias.c
index e61eb91..0759643 100644
--- a/libmultipath/alias.c
+++ b/libmultipath/alias.c
@@ -522,6 +522,7 @@ static void _free_binding(struct binding *bdg)
  * an abstract type.
  */
 typedef struct _vector Bindings;
+static Bindings global_bindings = { .allocated = 0 };
 
 static void free_bindings(Bindings *bindings)
 {
@@ -533,6 +534,11 @@ static void free_bindings(Bindings *bindings)
        vector_reset(bindings);
 }
 
+void cleanup_bindings(void)
+{
+       free_bindings(&global_bindings);
+}
+
 enum {
        BINDING_EXISTS,
        BINDING_CONFLICT,
@@ -762,7 +768,6 @@ int check_alias_settings(const struct config *conf)
        pthread_cleanup_pop(1);
        pthread_cleanup_pop(1);
 
-       pthread_cleanup_push_cast(free_bindings, &bindings);
        fd = open_file(conf->bindings_file, &can_write, BINDINGS_FILE_HEADER);
        if (fd != -1) {
                FILE *file = fdopen(fd, "r");
@@ -782,6 +787,8 @@ int check_alias_settings(const struct config *conf)
                        close(fd);
                }
        }
-       pthread_cleanup_pop(1);
+
+       cleanup_bindings();
+       global_bindings = bindings;
        return rc;
 }
diff --git a/libmultipath/alias.h b/libmultipath/alias.h
index fa33223..37b49d9 100644
--- a/libmultipath/alias.h
+++ b/libmultipath/alias.h
@@ -9,5 +9,6 @@ char *get_user_friendly_alias(const char *wwid, const char 
*file,
 
 struct config;
 int check_alias_settings(const struct config *);
+void cleanup_bindings(void);
 
 #endif /* _ALIAS_H */
diff --git a/libmultipath/libmultipath.version 
b/libmultipath/libmultipath.version
index a7b8c33..ddd302f 100644
--- a/libmultipath/libmultipath.version
+++ b/libmultipath/libmultipath.version
@@ -64,6 +64,7 @@ global:
        checker_name;
        checker_state_name;
        check_foreign;
+       cleanup_bindings;
        cleanup_lock;
        coalesce_paths;
        count_active_paths;
diff --git a/multipath/main.c b/multipath/main.c
index b78f316..45e9745 100644
--- a/multipath/main.c
+++ b/multipath/main.c
@@ -843,6 +843,8 @@ main (int argc, char *argv[])
        conf->force_sync = 1;
        if (atexit(cleanup_vecs))
                condlog(1, "failed to register cleanup handler for vecs: %m");
+       if (atexit(cleanup_bindings))
+               condlog(1, "failed to register cleanup handler for bindings: 
%m");
        while ((arg = getopt(argc, argv, ":adDcChl::eFfM:v:p:b:BrR:itTquUwW")) 
!= EOF ) {
                switch(arg) {
                case 'v':
diff --git a/multipathd/main.c b/multipathd/main.c
index 2e02a54..214ed4a 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -3325,6 +3325,7 @@ static void cleanup_child(void)
 {
        cleanup_threads();
        cleanup_vecs();
+       cleanup_bindings();
        if (poll_dmevents)
                cleanup_dmevent_waiter();
 
-- 
2.41.0

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