libvirt/SOURCES/libvirt-RHEL-virscsi-Introduce-and-use-virSCSIDeviceGetUnprivSGIOSysfsPath.patch
2021-10-08 13:11:20 +00:00

138 lines
5.2 KiB
Diff

From c9fc757c867d197c17350b6a9cabc63cc08105d2 Mon Sep 17 00:00:00 2001
Message-Id: <c9fc757c867d197c17350b6a9cabc63cc08105d2@dist-git>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Fri, 6 Mar 2020 15:52:23 +0100
Subject: [PATCH] RHEL: virscsi: Introduce and use
virSCSIDeviceGetUnprivSGIOSysfsPath()
When constructing a path to the 'unpriv_sgio' file of given SCSI
device we don't need to go through /dev/* and major() + minor()
path. The generated path points to
/sys/dev/block/MAJ:MIN/queue/unpriv_sgio which is wrong if the
SCSI device in question is not a block device. We can generate a
different path: /sys/bus/scsi/devices/X:X:X:X/unpriv_sgio where
the file is directly accessible regardless of the SCSI device
type.
https://bugzilla.redhat.com/show_bug.cgi?id=1808390
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Message-Id: <20200306145226.1610708-4-abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
---
src/libvirt_private.syms | 1 +
src/qemu/qemu_conf.c | 18 +++++++++++-------
src/util/virscsi.c | 18 ++++++++++++++++++
src/util/virscsi.h | 5 +++++
4 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 5dc99e03cf..1f97879faa 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2959,6 +2959,7 @@ virSCSIDeviceGetSgName;
virSCSIDeviceGetShareable;
virSCSIDeviceGetTarget;
virSCSIDeviceGetUnit;
+virSCSIDeviceGetUnprivSGIOSysfsPath;
virSCSIDeviceIsAvailable;
virSCSIDeviceListAdd;
virSCSIDeviceListCount;
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 7aaf2862a4..6d6feb97cd 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -1789,7 +1789,6 @@ qemuSetUnprivSGIO(virDomainDeviceDefPtr dev)
virDomainDiskDefPtr disk = NULL;
virDomainHostdevDefPtr hostdev = NULL;
g_autofree char *sysfs_path = NULL;
- g_autofree char *hostdev_path = NULL;
const char *path = NULL;
int val = 0;
@@ -1804,24 +1803,29 @@ qemuSetUnprivSGIO(virDomainDeviceDefPtr dev)
return 0;
path = virDomainDiskGetSource(disk);
+
+ if (!(sysfs_path = virGetUnprivSGIOSysfsPath(path, NULL)))
+ return -1;
+
} else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) {
hostdev = dev->data.hostdev;
+ virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
+ virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
if (hostdev->source.subsys.u.scsi.protocol ==
VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI)
return 0;
- if (!(hostdev_path = qemuGetHostdevPath(hostdev)))
+ if (!(sysfs_path = virSCSIDeviceGetUnprivSGIOSysfsPath(NULL,
+ scsihostsrc->adapter,
+ scsihostsrc->bus,
+ scsihostsrc->target,
+ scsihostsrc->unit)))
return -1;
-
- path = hostdev_path;
} else {
return 0;
}
- if (!(sysfs_path = virGetUnprivSGIOSysfsPath(path, NULL)))
- return -1;
-
/* By default, filter the SG_IO commands, i.e. set unpriv_sgio to 0. */
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
if (disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED)
diff --git a/src/util/virscsi.c b/src/util/virscsi.c
index 57958c06ea..1bba4051b6 100644
--- a/src/util/virscsi.c
+++ b/src/util/virscsi.c
@@ -322,6 +322,24 @@ virSCSIDeviceGetDevName(const char *sysfs_prefix,
}
+char *
+virSCSIDeviceGetUnprivSGIOSysfsPath(const char *sysfs_prefix,
+ const char *adapter,
+ unsigned int bus,
+ unsigned int target,
+ unsigned long long unit)
+{
+ unsigned int adapter_id;
+ const char *prefix = sysfs_prefix ? sysfs_prefix : SYSFS_SCSI_DEVICES;
+
+ if (virSCSIDeviceGetAdapterId(adapter, &adapter_id) < 0)
+ return NULL;
+
+ return g_strdup_printf("%s/%d:%u:%u:%llu/unpriv_sgio",
+ prefix, adapter_id, bus, target, unit);
+}
+
+
virSCSIDevicePtr
virSCSIDeviceNew(const char *sysfs_prefix,
const char *adapter,
diff --git a/src/util/virscsi.h b/src/util/virscsi.h
index 51627e0c05..c040d76716 100644
--- a/src/util/virscsi.h
+++ b/src/util/virscsi.h
@@ -42,6 +42,11 @@ char *virSCSIDeviceGetDevName(const char *sysfs_prefix,
unsigned int bus,
unsigned int target,
unsigned long long unit);
+char *virSCSIDeviceGetUnprivSGIOSysfsPath(const char *sysfs_prefix,
+ const char *adapter,
+ unsigned int bus,
+ unsigned int target,
+ unsigned long long unit);
virSCSIDevicePtr virSCSIDeviceNew(const char *sysfs_prefix,
const char *adapter,
--
2.25.1