Add [-m map] option to zpool_layout

By default the zpool_layout command would always use the slot
number assigned by Linux when generating the zdev.conf file.
This is a reasonable default there are cases when it makes
sense to remap the slot id assigned by Linux using your own
custom mapping.

This commit adds support to zpool_layout to provide a custom
slot mapping file.  The file contains in the first column the
Linux slot it and in the second column the custom slot mapping.
By passing this map file with '-m map' to zpool_config the
mapping will be applied when generating zdev.conf.

Additionally, two sample mapping have been added which reflect
different ways to map the slots in the dragon drawers.

scripts/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = zpool-config zpios-test zpios-profile
+SUBDIRS = zpool-config zpool-layout zpios-test zpios-profile
 
 pkglibexecdir = $(libexecdir)/@PACKAGE@
 dist_pkglibexec_SCRIPTS = \

scripts/Makefile.in

@@ -311,7 +311,7 @@ target_vendor = @target_vendor@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-SUBDIRS = zpool-config zpios-test zpios-profile
+SUBDIRS = zpool-config zpool-layout zpios-test zpios-profile
 dist_pkglibexec_SCRIPTS = \
 	$(top_builddir)/scripts/common.sh \
 	$(top_srcdir)/scripts/zconfig.sh \

scripts/zpool-layout/Makefile.am

@@ -0,0 +1,22 @@
+pkglibexecdir = $(libexecdir)/@PACKAGE@/zpool-layout
+dist_pkglibexec_SCRIPTS = \
+	$(top_srcdir)/scripts/zpool-layout/dragon.ddn.conf \
+	$(top_srcdir)/scripts/zpool-layout/dragon.llnl.conf
+
+all:
+	@list='$(dist_pkglibexec_SCRIPTS)'; \
+	for file in $$list; do \
+		link=$$(basename $$file); \
+		if [ ! -e $$link ]; then \
+			$(LN_S) $$file $$link; \
+		fi \
+	done
+
+clean:
+	@list='$(dist_pkglibexec_SCRIPTS)'; \
+	for file in $$list; do \
+		link=$$(basename $$file); \
+		if [ -L $$link ]; then \
+			$(RM) $$link; \
+		fi \
+	done

scripts/zpool-layout/dragon.ddn.conf

@@ -0,0 +1,67 @@
+#
+# Custom DDN slot mapping for zpool_layout command and
+# StorageScaler 6000 enclosures (Dragon Drawer).
+#
+# Linux	DDN
+# Slot	Slot
+#
+1	1
+2	13
+3	25
+4	37
+5	49
+6	2
+7	14
+8	26
+9	38
+10	50
+11	3
+12	15
+13	27
+14	39
+15	51
+16	4
+17	16
+18	28
+19	40
+20	52
+21	5
+22	17
+23	29
+24	41
+25	53
+26	6
+27	18
+28	30
+29	42
+30	54
+31	7
+32	19
+33	31
+34	43
+35	55
+36	8
+37	20
+38	32
+39	44
+40	56
+41	9
+42	21
+43	33
+44	45
+45	57
+46	10
+47	22
+48	34
+49	46
+50	58
+51	11
+52	23
+53	35
+54	47
+55	59
+56	12
+57	24
+58	36
+59	48
+60	60

scripts/zpool-layout/dragon.llnl.conf

@@ -0,0 +1,67 @@
+#
+# Custom LLNL slot mapping for zpool_layout command and
+# StorageScaler 6000 enclosures (Dragon Drawer).
+#
+# Linux	LLNL
+# Slot	Slot
+#
+1	25
+2	19
+3	13
+4	7
+5	1
+6	26
+7	20
+8	14
+9	8
+10	2
+11	27
+12	21
+13	15
+14	9
+15	3
+16	28
+17	22
+18	16
+19	10
+20	4
+21	29
+22	23
+23	17
+24	11
+25	5
+26	30
+27	24
+28	18
+29	12
+30	6
+31	60
+32	54
+33	48
+34	42
+35	36
+36	59
+37	53
+38	47
+39	41
+40	35
+41	58
+42	52
+43	46
+44	40
+45	34
+46	57
+47	51
+48	45
+49	39
+50	33
+51	56
+52	50
+53	44
+54	38
+55	32
+56	55
+57	49
+58	43
+59	37
+60	31