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libvirt/SOURCES/libvirt-RHEL-virscsi-Check-device-type-before-getting-it-s-dev-node-name.patch

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From b2bfe4e417e1a8a3703ef88320d38b555ef9d79f Mon Sep 17 00:00:00 2001
Message-Id: <b2bfe4e417e1a8a3703ef88320d38b555ef9d79f@dist-git>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Fri, 6 Mar 2020 15:52:21 +0100
Subject: [PATCH] RHEL: virscsi: Check device type before getting it's /dev
node name
Not all SCSI devices are block devices, therefore
/sys/bus/scsi/devices/X:X:X:X/block/ directory does not always
exist. Check if the SCSI device is a block device beforehand.
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: <20200306145226.1610708-2-abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
---
src/util/virscsi.c | 140 ++++++++++++++++++++++++++++++---
tests/virscsidata/0-0-0-0/type | 1 +
tests/virscsidata/1-0-0-0/type | 1 +
3 files changed, 131 insertions(+), 11 deletions(-)
create mode 100644 tests/virscsidata/0-0-0-0/type
create mode 100644 tests/virscsidata/1-0-0-0/type
diff --git a/src/util/virscsi.c b/src/util/virscsi.c
index 6a90d9002f..770f727cac 100644
--- a/src/util/virscsi.c
+++ b/src/util/virscsi.c
@@ -47,6 +47,32 @@ struct _virUsedByInfo {
};
typedef struct _virUsedByInfo virUsedByInfo;
+
+/* Keep in sync with scsi/scsi_proto.h */
+typedef enum {
+ VIR_SCSI_DEVICE_TYPE_NONE = -1,
+ VIR_SCSI_DEVICE_TYPE_DISK = 0x00,
+ VIR_SCSI_DEVICE_TYPE_TAPE = 0x01,
+ VIR_SCSI_DEVICE_TYPE_PRINTER = 0x02,
+ VIR_SCSI_DEVICE_TYPE_PROCESSOR = 0x03,
+ VIR_SCSI_DEVICE_TYPE_WORM = 0x04,
+ VIR_SCSI_DEVICE_TYPE_ROM = 0x05,
+ VIR_SCSI_DEVICE_TYPE_SCANNER = 0x06,
+ VIR_SCSI_DEVICE_TYPE_MOD = 0x07,
+ VIR_SCSI_DEVICE_TYPE_MEDIUM_CHANGER = 0x08,
+ VIR_SCSI_DEVICE_TYPE_COMM = 0x09,
+ VIR_SCSI_DEVICE_TYPE_RAID = 0x0c,
+ VIR_SCSI_DEVICE_TYPE_ENCLOSURE = 0x0d,
+ VIR_SCSI_DEVICE_TYPE_RBC = 0x0e,
+ VIR_SCSI_DEVICE_TYPE_OSD = 0x11,
+ VIR_SCSI_DEVICE_TYPE_ZBC = 0x14,
+ VIR_SCSI_DEVICE_TYPE_WLUN = 0x1e,
+ VIR_SCSI_DEVICE_TYPE_NO_LUN = 0x7f,
+
+ VIR_SCSI_DEVICE_TYPE_LAST,
+} virSCSIDeviceType;
+
+
struct _virSCSIDevice {
unsigned int adapter;
unsigned int bus;
@@ -126,6 +152,78 @@ virSCSIDeviceGetSgName(const char *sysfs_prefix,
return NULL;
}
+
+static int
+virSCSIDeviceGetType(const char *prefix,
+ unsigned int adapter,
+ unsigned int bus,
+ unsigned int target,
+ unsigned long long unit,
+ virSCSIDeviceType *type)
+{
+ int intType;
+
+ if (virFileReadValueInt(&intType,
+ "%s/%d:%u:%u:%llu/type",
+ prefix, adapter, bus, target, unit) < 0)
+ return -1;
+
+ switch (intType) {
+ case VIR_SCSI_DEVICE_TYPE_DISK:
+ case VIR_SCSI_DEVICE_TYPE_TAPE:
+ case VIR_SCSI_DEVICE_TYPE_PRINTER:
+ case VIR_SCSI_DEVICE_TYPE_PROCESSOR:
+ case VIR_SCSI_DEVICE_TYPE_WORM:
+ case VIR_SCSI_DEVICE_TYPE_ROM:
+ case VIR_SCSI_DEVICE_TYPE_SCANNER:
+ case VIR_SCSI_DEVICE_TYPE_MOD:
+ case VIR_SCSI_DEVICE_TYPE_MEDIUM_CHANGER:
+ case VIR_SCSI_DEVICE_TYPE_COMM:
+ case VIR_SCSI_DEVICE_TYPE_RAID:
+ case VIR_SCSI_DEVICE_TYPE_ENCLOSURE:
+ case VIR_SCSI_DEVICE_TYPE_RBC:
+ case VIR_SCSI_DEVICE_TYPE_OSD:
+ case VIR_SCSI_DEVICE_TYPE_ZBC:
+ case VIR_SCSI_DEVICE_TYPE_WLUN:
+ case VIR_SCSI_DEVICE_TYPE_NO_LUN:
+ *type = intType;
+ break;
+
+ default:
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unknown SCSI device type: %x"),
+ intType);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static char *
+virSCSIDeviceGetDevNameBlock(const char *prefix,
+ unsigned int adapter,
+ unsigned int bus,
+ unsigned int target,
+ unsigned long long unit)
+{
+ g_autoptr(DIR) dir = NULL;
+ struct dirent *entry;
+ g_autofree char *path = NULL;
+
+ path = g_strdup_printf("%s/%d:%u:%u:%llu/block",
+ prefix, adapter, bus, target, unit);
+
+ if (virDirOpen(&dir, path) < 0)
+ return NULL;
+
+ if (virDirRead(dir, &entry, path) > 0)
+ return g_strdup(entry->d_name);
+
+ return NULL;
+}
+
+
/* Returns device name (e.g. "sdc") on success, or NULL
* on failure.
*/
@@ -136,25 +234,45 @@ virSCSIDeviceGetDevName(const char *sysfs_prefix,
unsigned int target,
unsigned long long unit)
{
- g_autoptr(DIR) dir = NULL;
- struct dirent *entry;
- g_autofree char *path = NULL;
unsigned int adapter_id;
+ virSCSIDeviceType type;
const char *prefix = sysfs_prefix ? sysfs_prefix : SYSFS_SCSI_DEVICES;
if (virSCSIDeviceGetAdapterId(adapter, &adapter_id) < 0)
return NULL;
- path = g_strdup_printf("%s/%d:%u:%u:%llu/block", prefix, adapter_id, bus,
- target, unit);
-
- if (virDirOpen(&dir, path) < 0)
+ if (virSCSIDeviceGetType(prefix, adapter_id,
+ bus, target, unit, &type) < 0)
return NULL;
- if (virDirRead(dir, &entry, path) > 0)
- return g_strdup(entry->d_name);
-
- return NULL;
+ switch (type) {
+ case VIR_SCSI_DEVICE_TYPE_DISK:
+ return virSCSIDeviceGetDevNameBlock(prefix, adapter_id, bus, target, unit);
+
+ case VIR_SCSI_DEVICE_TYPE_TAPE:
+ case VIR_SCSI_DEVICE_TYPE_PRINTER:
+ case VIR_SCSI_DEVICE_TYPE_PROCESSOR:
+ case VIR_SCSI_DEVICE_TYPE_WORM:
+ case VIR_SCSI_DEVICE_TYPE_ROM:
+ case VIR_SCSI_DEVICE_TYPE_SCANNER:
+ case VIR_SCSI_DEVICE_TYPE_MOD:
+ case VIR_SCSI_DEVICE_TYPE_MEDIUM_CHANGER:
+ case VIR_SCSI_DEVICE_TYPE_COMM:
+ case VIR_SCSI_DEVICE_TYPE_RAID:
+ case VIR_SCSI_DEVICE_TYPE_ENCLOSURE:
+ case VIR_SCSI_DEVICE_TYPE_RBC:
+ case VIR_SCSI_DEVICE_TYPE_OSD:
+ case VIR_SCSI_DEVICE_TYPE_ZBC:
+ case VIR_SCSI_DEVICE_TYPE_WLUN:
+ case VIR_SCSI_DEVICE_TYPE_NO_LUN:
+ case VIR_SCSI_DEVICE_TYPE_NONE:
+ case VIR_SCSI_DEVICE_TYPE_LAST:
+ default:
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("unsupported SCSI device type: %x"),
+ type);
+ return NULL;
+ }
}
virSCSIDevice *
diff --git a/tests/virscsidata/0-0-0-0/type b/tests/virscsidata/0-0-0-0/type
new file mode 100644
index 0000000000..573541ac97
--- /dev/null
+++ b/tests/virscsidata/0-0-0-0/type
@@ -0,0 +1 @@
+0
diff --git a/tests/virscsidata/1-0-0-0/type b/tests/virscsidata/1-0-0-0/type
new file mode 100644
index 0000000000..573541ac97
--- /dev/null
+++ b/tests/virscsidata/1-0-0-0/type
@@ -0,0 +1 @@
+0
--
2.34.1
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