From 9c5daeb8c99ca12a66387de448f585742887fd75 Mon Sep 17 00:00:00 2001 Message-Id: <9c5daeb8c99ca12a66387de448f585742887fd75@dist-git> From: Michal Privoznik 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 Signed-off-by: Andrea Bolognani Message-Id: <20200306145226.1610708-2-abologna@redhat.com> Reviewed-by: Jiri Denemark --- 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