starlingx/integ
Code Issues Proposed changes
3c9ec741c0
integ/base/systemd/debian/patches/0015-Port-udev-old-sas-paths-creation-from-RHEL.patch
Dan Voiculeasa 8ec9595b4f Debian: systemd: switch to old sas naming 
This work is part of integration effort for Standard with dedicated
Storage.
It was observed SAS disk naming convention changed between CentOS
systemd v219 and Debian v247. Using the newer scheme we observe an
issue as described in the patch commit message.

Switch to using older naming scheme as a fix for the issue.

This change only affects Debian.
Tests on Standard with dedicated Storage:
PASS: build-pkgs, build-image, deploy
PASS: unlocked enabled available controller nodes
      unlocked enabled available storage nodes

Story: 2010211
Task: 46614
Signed-off-by: Dan Voiculeasa <dan.voiculeasa@windriver.com>
Change-Id: I0a1a923cdd1c1eec894e93fb5daea74e136303ee
2022-10-20 18:39:14 +03:00

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From a2403bcd26c154325871b8e99e809c47fe9f52b8 Mon Sep 17 00:00:00 2001
From: Dan Voiculeasa <dan.voiculeasa@windriver.com>
Date: Wed, 19 Oct 2022 18:41:18 +0300
Subject: [PATCH 15/15] Port udev old sas paths creation from RHEL
This ports the following patch file from RHEL:
0186-udev-also-create-old-sas-paths.patch [1]
On CentOS in systemd-219-78.el7_9.3.src.rpm the above mentioned patch
allows old naming scheme before upstream commit [2] merged.
With current implementation we see a mix of disks linked to the same
partitions, when multiple SAS disks are used, which is wrong.
ls -la /dev/disk/by-path/
pci-0000:04:00.0-sas-phy0-lun-0 -> ../../sda
pci-0000:04:00.0-sas-phy0-lun-0-part1 -> ../../sde1
pci-0000:04:00.0-sas-phy0-lun-0-part2 -> ../../sda2
pci-0000:04:00.0-sas-phy0-lun-0-part3 -> ../../sda3
pci-0000:04:00.0-sas-phy0-lun-0-part4 -> ../../sda4
pci-0000:04:00.0-sas-phy0-lun-0-part5 -> ../../sda5
pci-0000:04:00.0-sas-phy0-lun-0-part6 -> ../../sde6
pci-0000:04:00.0-sas-phy1-lun-0 -> ../../sdf
pci-0000:04:00.0-sas-phy1-lun-0-part1 -> ../../sdb1
pci-0000:04:00.0-sas-phy2-lun-0 -> ../../sdg
pci-0000:04:00.0-sas-phy3-lun-0 -> ../../sdd
With patch applied we see the disk links unfolded as expected.
ls -la /dev/disk/by-path/
pci-0000:04:00.0-sas-0x5000c5006c3d93ad-lun-0 -> ../../sde
pci-0000:04:00.0-sas-0x5000c5006c3d93ad-lun-0-part1 -> ../../sde1
pci-0000:04:00.0-sas-0x5000c5006c3f97ad-lun-0 -> ../../sdf
pci-0000:04:00.0-sas-0x5000c5006c3f97ad-lun-0-part1 -> ../../sdf1
pci-0000:04:00.0-sas-0x5000c5006c3fa189-lun-0 -> ../../sdd
pci-0000:04:00.0-sas-0x5000c5006c3fa189-lun-0-part1 -> ../../sdd1
pci-0000:04:00.0-sas-0x5000c5006c3fa1fd-lun-0 -> ../../sdc
pci-0000:04:00.0-sas-0x5000c5006c3fa1fd-lun-0-part1 -> ../../sdc1
pci-0000:04:00.0-sas-0x5000c5006c4033fd-lun-0 -> ../../sdb
pci-0000:04:00.0-sas-0x5000c5006c4033fd-lun-0-part1 -> ../../sdb1
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0 -> ../../sdg
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0-part1 -> ../../sdg1
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0-part2 -> ../../sdg2
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0-part3 -> ../../sdg3
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0-part4 -> ../../sdg4
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0-part5 -> ../../sdg5
pci-0000:04:00.0-sas-0x5000c50071886b25-lun-0-part6 -> ../../sdg6
pci-0000:04:00.0-sas-0x5001e67680f0d000-lun-0 -> ../../sda
pci-0000:04:00.0-sas-0x5001e67680f0d000-lun-0-part1 -> ../../sda1
pci-0000:04:00.0-sas-0x5001e67680f0d000-lun-0-part2 -> ../../sda2
pci-0000:04:00.0-sas-0x5001e67680f0d000-lun-0-part3 -> ../../sda3
pci-0000:04:00.0-sas-0x5001e67680f0d000-lun-0-part4 -> ../../sda4
pci-0000:04:00.0-sas-0x5001e67680f0d000-lun-0-part5 -> ../../sda5
Upside is we get to keep the same naming as on CentOS, making a
smoother upgrade experience.
Downside is we need to carry this patch until the upstream issue
is fixed and we decide to swtich to the new naming scheme.
Note: the code here was not redesigned to keep up with latest coding
trends (for example between upsteam v247 and v219 labels were dropped
in the modified functions, but the port introduces the 'restart'
label).
Don't port the changes in udev rules related to ID_SAS_PATH, since
we have not been using them. If needed later, we can update the repo
responsible for providing configuration files for systemd [3].
[1]: https://git.centos.org/rpms/systemd/blob/
c62b8ee391509d79d67dbdbbcc555ab3d4721409/f/SOURCES/
0186-udev-also-create-old-sas-paths.patch
[2]: https://github.com/systemd/systemd/commit/
66bba0e701b95dc42ed53e8f0799a7e2b944c147
[3]: https://opendev.org/starlingx/config-files/src/
branch/master/systemd-config
Signed-off-by: Dan Voiculeasa <dan.voiculeasa@windriver.com>
---
src/udev/udev-builtin-path_id.c | 35 +++++++++++++++++++++++++--------
1 file changed, 27 insertions(+), 8 deletions(-)
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c
index 0da59e2c75..eea6d7e798 100644
--- a/src/udev/udev-builtin-path_id.c
+++ b/src/udev/udev-builtin-path_id.c
@@ -148,7 +148,7 @@ static sd_device *handle_scsi_sas_wide_port(sd_device *parent, char **path) {
return parent;
}
-static sd_device *handle_scsi_sas(sd_device *parent, char **path) {
+static sd_device *handle_scsi_sas(sd_device *parent, char **path, bool enable_new_sas_path, bool *new_sas_path) {
sd_device *targetdev, *target_parent, *port, *expander;
_cleanup_(sd_device_unrefp) sd_device *target_sasdev = NULL, *expander_sasdev = NULL, *port_sasdev = NULL;
const char *sas_address = NULL;
@@ -159,6 +159,8 @@ static sd_device *handle_scsi_sas(sd_device *parent, char **path) {
assert(parent);
assert(path);
+ *new_sas_path = false;
+
if (sd_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target", &targetdev) < 0)
return NULL;
if (sd_device_get_parent(targetdev, &target_parent) < 0)
@@ -180,7 +182,7 @@ static sd_device *handle_scsi_sas(sd_device *parent, char **path) {
return NULL;
/* Check if we are simple disk */
- if (strncmp(phy_count, "1", 2) != 0)
+ if (strncmp(phy_count, "1", 2) != 0 || !enable_new_sas_path)
return handle_scsi_sas_wide_port(parent, path);
/* Get connected phy */
@@ -206,6 +208,8 @@ static sd_device *handle_scsi_sas(sd_device *parent, char **path) {
else
path_prepend(path, "sas-phy%s-%s", phy_id, lun);
+ *new_sas_path = true;
+
return parent;
}
@@ -408,7 +412,7 @@ static sd_device *handle_scsi_hyperv(sd_device *parent, char **path, size_t guid
return parent;
}
-static sd_device *handle_scsi(sd_device *parent, char **path, char **compat_path, bool *supported_parent) {
+static sd_device *handle_scsi(sd_device *parent, char **path, char **compat_path, bool *supported_parent, bool enable_new_sas_path, bool *new_sas_path) {
const char *devtype, *id, *name;
if (sd_device_get_devtype(parent, &devtype) < 0 ||
@@ -433,7 +437,7 @@ static sd_device *handle_scsi(sd_device *parent, char **path, char **compat_path
if (strstr(name, "/end_device-")) {
*supported_parent = true;
- return handle_scsi_sas(parent, path);
+ return handle_scsi_sas(parent, path, enable_new_sas_path, new_sas_path);
}
if (strstr(name, "/session")) {
@@ -540,9 +544,13 @@ static int builtin_path_id(sd_device *dev, int argc, char *argv[], bool test) {
bool supported_transport = false;
bool supported_parent = false;
const char *subsystem;
+ bool enable_new_sas_path = true;
+ bool new_sas_path = false;
assert(dev);
+restart:
+ ;
/* walk up the chain of devices and compose path */
parent = dev;
while (parent) {
@@ -554,7 +562,7 @@ static int builtin_path_id(sd_device *dev, int argc, char *argv[], bool test) {
} else if (streq(subsys, "scsi_tape")) {
handle_scsi_tape(parent, &path);
} else if (streq(subsys, "scsi")) {
- parent = handle_scsi(parent, &path, &compat_path, &supported_parent);
+ parent = handle_scsi(parent, &path, &compat_path, &supported_parent, enable_new_sas_path, &new_sas_path);
supported_transport = true;
} else if (streq(subsys, "cciss")) {
parent = handle_cciss(parent, &path);
@@ -709,9 +717,20 @@ static int builtin_path_id(sd_device *dev, int argc, char *argv[], bool test) {
i--;
tag[i] = '\0';
- udev_builtin_add_property(dev, test, "ID_PATH", path);
- udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag);
- }
+ if (new_sas_path) {
+ udev_builtin_add_property(dev, test, "ID_SAS_PATH", path);
+ } else {
+ udev_builtin_add_property(dev, test, "ID_PATH", path);
+ udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag);
+ }
+
+ if (new_sas_path) {
+ free(path);
+ path = NULL;
+ enable_new_sas_path = false;
+ goto restart;
+ }
+ }
/*
* Compatible link generation for ATA devices
--
2.34.1
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