@@ -31,6 +31,7 @@ prefix =
exec_prefix = $(prefix)
bindir = $(exec_prefix)/sbin
libudevdir = ${prefix}/lib/udev
+udevrulesdir = $(libudevdir)/rules.d
multipathdir = $(TOPDIR)/libmultipath
mandir = $(prefix)/usr/share/man/man8
man5dir = $(prefix)/usr/share/man/man5
new file mode 100644
@@ -0,0 +1,34 @@
+ACTION!="add|change", GOTO="mpath_end"
+ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="mpath_end"
+ENV{DM_UUID}!="mpath-?*", GOTO="mpath_end"
+
+# Do not initiate scanning if no path is available,
+# otherwise there would be a hang or IO error on access.
+# We'd like to avoid this, especially within udev processing.
+ENV{DM_NR_VALID_PATHS}!="?*", IMPORT{db}="DM_NR_VALID_PATHS"
+ENV{DM_NR_VALID_PATHS}=="0", ENV{DM_NOSCAN}="1"
+
+# Also skip all foreign rules if no path is available.
+# Remember the original value of DM_DISABLE_OTHER_RULES_FLAG
+# and restore it back once we have at least one path available.
+IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
+ENV{DM_ACTION}=="PATH_FAILED",\
+ ENV{DM_NR_VALID_PATHS}=="0",\
+ ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}=="",\
+ ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}",\
+ ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
+ENV{DM_ACTION}=="PATH_REINSTATED",\
+ ENV{DM_NR_VALID_PATHS}=="1",\
+ ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}",\
+ ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="",\
+ ENV{DM_ACTIVATION}="1"
+
+# DM_SUBSYSTEM_UDEV_FLAG0 is the "RELOAD" flag for multipath subsystem.
+# Drop the DM_ACTIVATION flag here as mpath reloads tables if any of its
+# paths are lost/recovered. For any stack above the mpath device, this is not
+# something that should be reacted upon since it would be useless extra work.
+# It's exactly mpath's job to provide *seamless* device access to any of the
+# paths that are available underneath.
+ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", ENV{DM_ACTIVATION}="0"
+
+LABEL="mpath_end"
@@ -21,6 +21,8 @@ $(EXEC): $(OBJS)
install:
$(INSTALL_PROGRAM) -d $(DESTDIR)$(bindir)
$(INSTALL_PROGRAM) -m 755 $(EXEC) $(DESTDIR)$(bindir)/
+ $(INSTALL_PROGRAM) -d $(DESTDIR)$(udevrulesdir)
+ $(INSTALL_PROGRAM) -m 644 11-dm-mpath.rules $(DESTDIR)$(udevrulesdir)
$(INSTALL_PROGRAM) -d $(DESTDIR)$(mandir)
$(INSTALL_PROGRAM) -m 644 $(EXEC).8.gz $(DESTDIR)$(mandir)
$(INSTALL_PROGRAM) -d $(DESTDIR)$(man5dir)
@@ -28,6 +30,7 @@ install:
uninstall:
rm $(DESTDIR)$(bindir)/$(EXEC)
+ rm $(DESTDIR)$(udevrulesdir)/11-dm-mpath.rules
rm $(DESTDIR)$(mandir)/$(EXEC).8.gz
rm $(DESTDIR)$(man5dir)/$(EXEC).conf.5.gz