File 0100-nvme_fc-auto-connect-scripts.patch of Package nvme-cli.11346

From 6d827f7848212033ba2e560922a4b55bc323a1ef Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Mon, 14 Jan 2019 10:15:16 +0100
Subject: [PATCH] nvme_fc auto-connect scripts

References: bsc#1103354

Here's a set of script to enable FC-NVMe autoconnect, based on
the initial posting from James Smart.
FC-NVMe already generates an uevent whenever a new FC-NVMe remote
port is registered, so we can create an udev rule to parse this
event and start connecting to it.

The problem here is that the 'nvme connect' call might be taking
some time or might even stall altogether, so we cannot call it
directly from the udev rule. Rather, the udev rule starts a systemd
service, which then calls 'nvme connect' as a 'oneshot' program.
With this approach we are insulated from any stalls in udev rules.
Additionally we can implement a boot service to restart any missed
connections attempts.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
---
 nvme-fc-autoconnect/70-nvmefc-autoconnect.conf      |  1 +
 nvme-fc-autoconnect/70-nvmefc-autoconnect.rules     |  8 ++++++++
 nvme-fc-autoconnect/nvmefc-boot-connections.service |  9 +++++++++
 nvme-fc-autoconnect/nvmefc-connect@.service         | 14 ++++++++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 nvme-fc-autoconnect/70-nvmefc-autoconnect.conf
 create mode 100644 nvme-fc-autoconnect/70-nvmefc-autoconnect.rules
 create mode 100644 nvme-fc-autoconnect/nvmefc-boot-connections.service
 create mode 100644 nvme-fc-autoconnect/nvmefc-connect@.service

diff --git a/nvme-fc-autoconnect/70-nvmefc-autoconnect.conf b/nvme-fc-autoconnect/70-nvmefc-autoconnect.conf
new file mode 100644
index 0000000..b92d94f
--- /dev/null
+++ b/nvme-fc-autoconnect/70-nvmefc-autoconnect.conf
@@ -0,0 +1 @@
+install_items+="/usr/lib/udev/rules.d/70-nvmefc-autoconnect.rules"
diff --git a/nvme-fc-autoconnect/70-nvmefc-autoconnect.rules b/nvme-fc-autoconnect/70-nvmefc-autoconnect.rules
new file mode 100644
index 0000000..aa4f9bf
--- /dev/null
+++ b/nvme-fc-autoconnect/70-nvmefc-autoconnect.rules
@@ -0,0 +1,8 @@
+#
+# nvme_fc: udev event to automatically scan (via discovery controller)
+#   new FC nvme remote ports and auto-connect to the subsystems they report.
+#
+
+ACTION=="change", SUBSYSTEM=="fc", ENV{FC_EVENT}=="nvmediscovery", \
+  ENV{NVMEFC_HOST_TRADDR}=="*",  ENV{NVMEFC_TRADDR}=="*", \
+  RUN+="/usr/bin/systemctl --no-block start nvmefc-connect@--host-traddr=$env{NVMEFC_HOST_TRADDR}\\x20--traddr=$env{NVMEFC_TRADDR}.service"
diff --git a/nvme-fc-autoconnect/nvmefc-boot-connections.service b/nvme-fc-autoconnect/nvmefc-boot-connections.service
new file mode 100644
index 0000000..aa35c15
--- /dev/null
+++ b/nvme-fc-autoconnect/nvmefc-boot-connections.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Auto-connect to subsystems on FC-NVME devices during boot
+
+[Service]
+Type=oneshot
+ExecStart=/bin/sh -c "echo add > /sys/class/fc/fc_udev_device/nvme_discovery"
+
+[Install]
+WantedBy=default.target
diff --git a/nvme-fc-autoconnect/nvmefc-connect@.service b/nvme-fc-autoconnect/nvmefc-connect@.service
new file mode 100644
index 0000000..c2370d6
--- /dev/null
+++ b/nvme-fc-autoconnect/nvmefc-connect@.service
@@ -0,0 +1,14 @@
+#
+# Unit file used by 70-nvmefc-autoconnect.rules.
+#
+
+[Unit]
+Description=Auto-connect to subsystems on FC-NVME devices
+After=syslog.target
+
+[Service]
+Type=oneshot
+ExecStart=/bin/sh -c "/usr/sbin/nvme connect-all --transport=fc `/usr/bin/echo -e '%i'`"
+
+[Install]
+WantedBy=default.target
-- 
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