Add udev rule to define lower timeout for instance storage volumes

The timeout will be enabled only for kernel versions>=4.14.146
[tt:D12076018]. Any kernel version below that should not be affected
due to absence of sysfs attributes all together.

Author: anchalag

70-ec2-nvme-devices.rules

@@ -14,3 +14,5 @@ KERNEL=="nvme[0-9]*n[0-9]*p[0-9]*", ENV{DEVTYPE}=="partition", ATTRS{serial}=="?
 # ebs nvme devices
 KERNEL=="nvme[0-9]*n[0-9]*",        ENV{DEVTYPE}=="disk",      ATTRS{model}=="Amazon Elastic Block Store", PROGRAM="/sbin/ebsnvme-id -u /dev/%k", SYMLINK+="%c"
 KERNEL=="nvme[0-9]*n[0-9]*p[0-9]*", ENV{DEVTYPE}=="partition", ATTRS{model}=="Amazon Elastic Block Store", PROGRAM="/sbin/ebsnvme-id -u /dev/%k", SYMLINK+="%c%n"
+# instance store nvme devices
+KERNEL=="nvme[0-9]*n[0-9]*",        ENV{DEVTYPE}=="disk",      ATTRS{model}=="Amazon EC2 NVMe Instance Storage", ATTR{queue/io_timeout}="90000"

ec2-utils.spec

@@ -1,7 +1,7 @@
 Name:      ec2-utils
 Summary:   A set of tools for running in EC2
 Version:   1.0
-Release:   1%{?dist}
+Release:   2%{?dist}
 License:   MIT
 Group:     System Tools
 
@@ -80,6 +80,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_sysconfdir}/udev/rules.d/70-ec2-nvme-devices.rules
 
 %changelog
+* Tue Aug 27 2019 Anchal Agarwal <anchalag@amazon.com>
+- Add udev rule to define lower timeout for instance storage volumes
+
 * Wed Sep 22 2010 Nathan Blackham <blackham@amazon.com>
 - move to ec2-utils
 - add udev code for symlinking xvd* devices to sd*