File bootlist-Support-multiple-dev-paths-for-a-nvme-boot-.patch of Package powerpc-utils.33189
From 882335a30d04032d2684e165f70646b368a788b4 Mon Sep 17 00:00:00 2001
From: Wen Xiong <wenxiong@linux.ibm.com>
Date: Tue, 30 Jan 2024 10:49:13 -0600
Subject: [PATCH] bootlist: Support multiple dev paths for a nvme boot device
Multipath splitter drawer is going to support two physical paths for
each nvme device.
This patch adds the support for multiple device/of paths for a nvme boot
device.
For example,
#lsslot -c pci
U50EE.001.WZS000E-P3-C1-R1 U.2 PCI-E capable, Rev 4, 4x lanes with 2x
lanes connected 0581:10:00.0
U50EE.001.WZS000E-P3-C1-R2 U.2 PCI-E capable, Rev 4, 4x lanes with 2x
lanes connected 0521:10:00.0
#nvme list-subsys
nvme-subsys1 -
NQN=nqn.1994-11.com.samsung:nvme:PM1735a:2.5-inch:S6RUNE0R900042
hostnqn=nqn.2014-08.org.nvmexpress:uuid:3c6c1ace-e9b1-4a17-8ff0-6a84d3dd15f4
iopolicy=numa
\
+- nvme1 pcie 0523:20:00.0 live
+- nvme0 pcie 0583:20:00.0 live
# bootlist -m normal nvme1n1
# bootlist -m normal -o
nvme0
nvme1n1
#bootlist -m normal -r
/pci@800000020000583/pci1014,6bc@0/namespace@1
/pci@800000020000523/pci1014,6bc@0/namespace@1
Signed-off-by: Wen Xiong <wenxiong@linux.ibm.com>
[tyreld: fixup whitespace errors]
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
scripts/bootlist | 80 +++++++++++++++++++++++++++++++++++++++---------
1 file changed, 66 insertions(+), 14 deletions(-)
diff --git a/scripts/bootlist b/scripts/bootlist
index cc8718e..58c090f 100755
--- a/scripts/bootlist
+++ b/scripts/bootlist
@@ -304,6 +304,21 @@ is_nvmf_device()
fi
}
+# is_multipath_nvme_device
+# Check to see if this is a multipath nvme device
+#
+is_multipath_nvme_device()
+{
+ local res
+
+ res=`$FIND /sys/devices/virtual/nvme-subsystem -name $1 2>/dev/null`
+ if [[ ${#res} = 0 ]]; then
+ echo "no"
+ else
+ echo "yes"
+ fi
+}
+
# get_link
# return the directory path that a link points to.
# The only parameter is the link name.
@@ -340,6 +355,32 @@ add_nvmf()
fi
}
+add_multipath_nvme()
+{
+ local DEVNAME=$1
+
+ ctrl_name=$DEVNAME
+ local startctr=$ctr
+
+ local dir
+ for dir in `$FIND /sys/devices/virtual/nvme-subsystem -name "$ctrl_name"`; do
+ cd $dir
+ cd ..
+ for slave in `ls -d $PWD/nvme*`; do
+ slavedev=${slave##*/}
+ if [[ "$slavedev" != *nvme*n* ]] ; then
+ LOGICAL_NAMES[$ctr]=${slavedev}
+ ctr=$[$ctr + 1]
+ fi
+ done
+ done
+
+ if [[ "$startctr" = "$ctr" ]] ; then
+ LOGICAL_NAMES[$ctr]=$1
+ ctr=$[$ctr + 1]
+ fi
+}
+
add_logical()
{
local DEVNAME=$1
@@ -487,31 +528,40 @@ while [[ -n $1 ]]; do
if [[ "$1" == *"dm-"* ]] ; then
add_logical $1
else
- if [[ "$1" == *"nvme-of"* ]]; then
+ if [[ "$1" == *"nvme-of"* ]] || [[ "$1" == *"namespace"* ]]; then
ctrl_name=`get_logical_device_name $1`
+ master_of_path=$1
else
ctrl_name=$1
ctrl_name=${ctrl_name##*/}
+ master_of_path=`get_of_device_name $1`
fi
+
+ if [[ -z $master_of_path ]]; then
+ echo "Device $1 does not appear to be valid." >&2
+ exit 1
+ fi
+
ctrl_name="${ctrl_name%n[0-9]*}"
is_nvmf=$(is_nvmf_device $ctrl_name)
if [[ $is_nvmf = "yes" ]]; then
- if [[ "$1" == *"nvme-of"* ]]; then
- master_of_path=$1
- else
- master_of_path=`get_of_device_name $1`
- fi
-
- if [[ -z $master_of_path ]]; then
- echo "Device $1 does not appear to be valid." >&2
- exit 1
- fi
-
namespace_base=${master_of_path##*/}
DEVTYPE="nvme-of"
add_nvmf $ctrl_name
else
- add_logical $1
+ is_multipath_nvme=$(is_multipath_nvme_device $ctrl_name)
+ if [[ $is_multipath_nvme = "yes" ]]; then
+ if [[ "$master_of_path" == *namespace* ]] ; then
+ namespace_base=${master_of_path##*/}
+ else
+ echo "Device $1 does not appear to be valid." >&2
+ exit 1
+ fi
+ DEVTYPE="multi-nvme"
+ add_multipath_nvme $ctrl_name
+ else
+ add_logical $1
+ fi
fi
fi
fi
@@ -534,8 +584,10 @@ if [[ ${#LOGICAL_NAMES[*]} -ne 0 ]]; then
if [[ -z ${OF_DEVPATH[$ctr]} ]]; then
# See if this is an OF pathname
OF_DEVPATH[$ctr]=`get_of_device_name ${LOGICAL_NAMES[$ctr]}`
- if [[ $DEVTYPE = "nvme-of" ]]; then
+ if [[ $DEVTYPE = "nvme-of" ]] || [[ $DEVTYPE = "multi-nvme" ]]; then
OF_DEVPATH[$ctr]=${OF_DEVPATH[$ctr]}/$namespace_base
+ else
+ OF_DEVPATH[$ctr]=${OF_DEVPATH[$ctr]}
fi
else
OF_DEVPATH[$ctr]=${LOGICAL_NAMES[$ctr]}
--
2.43.0
