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 | 13 +++++++++++++ libmultipath/config.h | 1 + multipath/multipath.rules.in | 1 + multipathd/multipathd.8 | 2 ++ multipathd/multipathd.service | 1 + multipathd/multipathd.socket | 1 + 6 files changed, 19 insertions(+) diff --git a/libmultipath/config.c b/libmultipath/config.c index 5c5c0726..183b319d 100644 --- a/libmultipath/config.c +++ b/libmultipath/config.c @@ -966,6 +966,19 @@ int _init_config (const char *file, struct config *conf) } factorize_hwtable(conf->hwtable, builtin_hwtable_size, file); validate_pctable(conf->overrides, 0, file); + } else { + condlog(0, "/etc/multipath.conf does not exist, blacklisting all devices."); + 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, ".*", 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 87947469..0dc89c16 100644 --- a/libmultipath/config.h +++ b/libmultipath/config.h @@ -10,6 +10,7 @@ #define ORIGIN_DEFAULT 0 #define ORIGIN_CONFIG 1 +#define ORIGIN_NO_CONFIG 2 enum devtypes { DEV_NONE, diff --git a/multipath/multipath.rules.in b/multipath/multipath.rules.in index 6f123760..70b69a06 100644 --- a/multipath/multipath.rules.in +++ b/multipath/multipath.rules.in @@ -9,6 +9,7 @@ IMPORT{cmdline}="nompath" ENV{nompath}=="?*", GOTO="end_mpath" IMPORT{cmdline}="multipath" ENV{multipath}=="off", GOTO="end_mpath" +TEST!="/etc/multipath.conf", GOTO="end_mpath" ENV{DEVTYPE}!="partition", GOTO="test_dev" IMPORT{parent}="DM_MULTIPATH_DEVICE_PATH" diff --git a/multipathd/multipathd.8 b/multipathd/multipathd.8 index bdf102eb..a16a0bd5 100644 --- a/multipathd/multipathd.8 +++ b/multipathd/multipathd.8 @@ -48,6 +48,8 @@ map regains its maximum performance and redundancy. With the \fB-k\fR option, \fBmultipathd\fR acts as a client utility that sends commands to a running instance of the multipathd daemon (see \fBCOMMANDS\fR below). + +In this Linux distribution, multipathd does not run unless a /etc/multipath.conf file exists. . . .\" ---------------------------------------------------------------------------- diff --git a/multipathd/multipathd.service b/multipathd/multipathd.service index 5a9cde12..311f49c7 100644 --- a/multipathd/multipathd.service +++ b/multipathd/multipathd.service @@ -6,6 +6,7 @@ Wants=systemd-udevd-kernel.socket After=systemd-udevd-kernel.socket After=multipathd.socket systemd-remount-fs.service Before=initrd-cleanup.service +ConditionPathExists=/etc/multipath.conf DefaultDependencies=no Conflicts=shutdown.target Conflicts=initrd-cleanup.service diff --git a/multipathd/multipathd.socket b/multipathd/multipathd.socket index c777e5e3..3c20a2ff 100644 --- a/multipathd/multipathd.socket +++ b/multipathd/multipathd.socket @@ -1,6 +1,7 @@ [Unit] Description=multipathd control socket DefaultDependencies=no +ConditionPathExists=/etc/multipath.conf ConditionKernelCommandLine=!nompath ConditionKernelCommandLine=!multipath=off ConditionVirtualization=!container