de5fe16817
The content of this branch was automatically imported from Fedora ELN with the following as its source: https://src.fedoraproject.org/rpms/device-mapper-multipath#2cf40b2f98808e3533e915c0a204b885d9da5e43
90 lines
2.4 KiB
Diff
90 lines
2.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Benjamin Marzinski <bmarzins@redhat.com>
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Date: Tue, 19 May 2020 12:08:40 -0500
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Subject: [PATCH] libmultipath: make libmp_dm_init optional
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Move dm_initialized out of libmp_dm_task_create(), and add
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a function skip_libmp_dm_init() so that users of libmultipath can skip
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initializing device-mapper. This is needed for other programs that
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use libmultipath (or a library that depends on it) but want to control
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how device-mapper is set up.
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Also make dm_prereq a global function.
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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libmultipath/devmapper.c | 17 +++++++++++++----
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libmultipath/devmapper.h | 3 ++-
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2 files changed, 15 insertions(+), 5 deletions(-)
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diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
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index 13a1cf53..7ed494a1 100644
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--- a/libmultipath/devmapper.c
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+++ b/libmultipath/devmapper.c
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@@ -33,6 +33,8 @@
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#define MAX_WAIT 5
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#define LOOPS_PER_SEC 5
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+static pthread_once_t dm_initialized = PTHREAD_ONCE_INIT;
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+
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static int dm_conf_verbosity;
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#ifdef LIBDM_API_DEFERRED
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@@ -229,7 +231,7 @@ dm_tgt_prereq (unsigned int *ver)
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return 1;
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}
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-static int dm_prereq(unsigned int *v)
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+int dm_prereq(unsigned int *v)
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{
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if (dm_lib_prereq())
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return 1;
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@@ -243,7 +245,7 @@ void libmp_udev_set_sync_support(int on)
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libmp_dm_udev_sync = !!on;
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}
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-void libmp_dm_init(void)
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+static void libmp_dm_init(void)
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{
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struct config *conf;
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int verbosity;
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@@ -262,11 +264,18 @@ void libmp_dm_init(void)
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dm_udev_set_sync_support(libmp_dm_udev_sync);
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}
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+static void _do_skip_libmp_dm_init(void)
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+{
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+}
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+
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+void skip_libmp_dm_init(void)
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+{
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+ pthread_once(&dm_initialized, _do_skip_libmp_dm_init);
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+}
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+
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struct dm_task*
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libmp_dm_task_create(int task)
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{
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- static pthread_once_t dm_initialized = PTHREAD_ONCE_INIT;
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-
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pthread_once(&dm_initialized, libmp_dm_init);
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return dm_task_create(task);
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}
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diff --git a/libmultipath/devmapper.h b/libmultipath/devmapper.h
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index 7557a86b..17fc9faf 100644
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--- a/libmultipath/devmapper.h
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+++ b/libmultipath/devmapper.h
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@@ -28,7 +28,8 @@
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#define UUID_PREFIX_LEN (sizeof(UUID_PREFIX) - 1)
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void dm_init(int verbosity);
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-void libmp_dm_init(void);
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+int dm_prereq(unsigned int *v);
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+void skip_libmp_dm_init(void);
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void libmp_udev_set_sync_support(int on);
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struct dm_task *libmp_dm_task_create(int task);
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int dm_drv_version (unsigned int * version);
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--
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2.17.2
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