From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Benjamin Marzinski Date: Wed, 15 Oct 2014 10:39:30 -0500 Subject: [PATCH] RH: don't start without a config file If /etc/multipath.conf doesn't exist, don't start multipathd and blacklist all devices when running multipath. A completely blank configuration file is almost never what users want. Also, people may have the multipath packages installed but don't want to use them. This patch provides a simple way to disable multipath. Simply removing or renaming /etc/multipath.conf will keep multipath from doing anything. Signed-off-by: Benjamin Marzinski --- libmultipath/config.c | 17 +++++++++++++++++ libmultipath/config.h | 1 + multipath/multipath.rules | 1 + multipathd/multipathd.service | 1 + 4 files changed, 20 insertions(+) diff --git a/libmultipath/config.c b/libmultipath/config.c index bb6619b..aae69b8 100644 --- a/libmultipath/config.c +++ b/libmultipath/config.c @@ -25,6 +25,7 @@ #include "prio.h" #include "devmapper.h" #include "mpath_cmd.h" +#include "version.h" static int hwe_strmatch (struct hwentry *hwe1, struct hwentry *hwe2) @@ -667,6 +668,22 @@ load_config (char * file) factorize_hwtable(conf->hwtable, builtin_hwtable_size); } + } else { + condlog(0, "/etc/multipath.conf does not exist, blacklisting all devices."); + condlog(0, "A default multipath.conf file is located at"); + condlog(0, "/usr/share/doc/device-mapper-multipath-%d.%d.%d/multipath.conf", MULTIPATH_VERSION(VERSION_CODE)); + if (conf->blist_devnode == NULL) { + conf->blist_devnode = vector_alloc(); + if (!conf->blist_devnode) { + condlog(0, "cannot allocate blacklist\n"); + goto out; + } + } + if (store_ble(conf->blist_devnode, strdup(".*"), + ORIGIN_NO_CONFIG)) { + condlog(0, "cannot store default no-config blacklist\n"); + goto out; + } } conf->processed_main_config = 1; diff --git a/libmultipath/config.h b/libmultipath/config.h index ffc69b5..614331c 100644 --- a/libmultipath/config.h +++ b/libmultipath/config.h @@ -7,6 +7,7 @@ #define ORIGIN_DEFAULT 0 #define ORIGIN_CONFIG 1 +#define ORIGIN_NO_CONFIG 2 /* * In kernel, fast_io_fail == 0 means immediate failure on rport delete. diff --git a/multipath/multipath.rules b/multipath/multipath.rules index 4d78b98..5753766 100644 --- a/multipath/multipath.rules +++ b/multipath/multipath.rules @@ -6,6 +6,7 @@ IMPORT{cmdline}="nompath" ENV{nompath}=="?*", GOTO="end_mpath" IMPORT{cmdline}="multipath" ENV{multipath}=="off", GOTO="end_mpath" +TEST!="/etc/multipath.conf", GOTO="end_mpath" KERNEL=="dm-*", GOTO="check_kpartx" ENV{DEVTYPE}!="partition", GOTO="test_dev" diff --git a/multipathd/multipathd.service b/multipathd/multipathd.service index fd66cf6..fafd088 100644 --- a/multipathd/multipathd.service +++ b/multipathd/multipathd.service @@ -4,6 +4,7 @@ Wants=systemd-udev-trigger.service systemd-udev-settle.service Before=iscsi.service iscsid.service lvm2-lvmetad.service lvm2-activation-early.service Before=local-fs-pre.target blk-availability.service After=multipathd.socket systemd-udev-trigger.service systemd-udev-settle.service +ConditionPathExists=/etc/multipath.conf DefaultDependencies=no Conflicts=shutdown.target ConditionKernelCommandLine=!nompath -- 2.7.4