/* Returns device name (e.g. "sdc") on success, or NULL
* on failure.
*/
char *
virSCSIDeviceGetDevName(const char *sysfs_prefix,
const char *adapter,
unsigned int bus,
unsigned int target,
unsigned long long unit)
{
DIR *dir = NULL;
struct dirent *entry;
char *path = NULL;
char *name = NULL;
unsigned int adapter_id;
const char *prefix = sysfs_prefix ? sysfs_prefix : SYSFS_SCSI_DEVICES;
if (virSCSIDeviceGetAdapterId(adapter, &adapter_id) < 0)
return NULL;
if (virAsprintf(&path,
"%s/%d:%u:%u:%llu/block",
prefix, adapter_id, bus, target, unit) < 0)
return NULL;
if (virDirOpen(&dir, path) < 0)
goto cleanup;
while (virDirRead(dir, &entry, path) > 0) {
ignore_value(VIR_STRDUP(name, entry->d_name));
break;
}
cleanup:
VIR_DIR_CLOSE(dir);
VIR_FREE(path);
return name;
}
/* Returns device name (e.g. "sdc") on success, or NULL
* on failure.
*/
char *
virSCSIDeviceGetDevName(const char *adapter,
unsigned int bus,
unsigned int target,
unsigned int unit)
{
DIR *dir = NULL;
struct dirent *entry;
char *path = NULL;
char *name = NULL;
unsigned int adapter_id;
if (virSCSIDeviceGetAdapterId(adapter, &adapter_id) < 0)
return NULL;
if (virAsprintf(&path,
SYSFS_SCSI_DEVICES "/%d:%d:%d:%d/block",
adapter_id, bus, target, unit) < 0)
return NULL;
if (!(dir = opendir(path))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to open %s"), path);
goto cleanup;
}
while ((entry = readdir(dir))) {
if (entry->d_name[0] == '.')
continue;
ignore_value(VIR_STRDUP(name, entry->d_name));
break;
}
cleanup:
closedir(dir);
VIR_FREE(path);
return name;
}
virSCSIDevicePtr
virSCSIDeviceNew(const char *adapter,
unsigned int bus,
unsigned int target,
unsigned int unit,
bool readonly)
{
virSCSIDevicePtr dev, ret = NULL;
char *sg = NULL;
char *vendor_path = NULL;
char *model_path = NULL;
char *vendor = NULL;
char *model = NULL;
if (VIR_ALLOC(dev) < 0)
return NULL;
dev->bus = bus;
dev->target = target;
dev->unit = unit;
dev->readonly = readonly;
if (!(sg = virSCSIDeviceGetSgName(adapter, bus, target, unit)))
goto cleanup;
if (virSCSIDeviceGetAdapterId(adapter, &dev->adapter) < 0)
goto cleanup;
if (virAsprintf(&dev->name, "%d:%d:%d:%d", dev->adapter,
dev->bus, dev->target, dev->unit) < 0 ||
virAsprintf(&dev->sg_path, "/dev/%s", sg) < 0)
goto cleanup;
if (access(dev->sg_path, F_OK) != 0) {
virReportSystemError(errno,
_("SCSI device '%s': could not access %s"),
dev->name, dev->sg_path);
goto cleanup;
}
if (virAsprintf(&vendor_path,
SYSFS_SCSI_DEVICES "/%s/vendor", dev->name) < 0 ||
virAsprintf(&model_path,
SYSFS_SCSI_DEVICES "/%s/model", dev->name) < 0)
goto cleanup;
if (virFileReadAll(vendor_path, 1024, &vendor) < 0)
goto cleanup;
if (virFileReadAll(model_path, 1024, &model) < 0)
goto cleanup;
virTrimSpaces(vendor, NULL);
virTrimSpaces(model, NULL);
if (virAsprintf(&dev->id, "%s:%s", vendor, model) < 0)
goto cleanup;
ret = dev;
cleanup:
VIR_FREE(sg);
VIR_FREE(vendor);
VIR_FREE(model);
VIR_FREE(vendor_path);
VIR_FREE(model_path);
if (!ret)
virSCSIDeviceFree(dev);
return ret;
}
virSCSIDevicePtr
virSCSIDeviceNew(const char *sysfs_prefix,
const char *adapter,
unsigned int bus,
unsigned int target,
unsigned long long unit,
bool readonly,
bool shareable)
{
virSCSIDevicePtr dev, ret = NULL;
char *sg = NULL;
char *vendor_path = NULL;
char *model_path = NULL;
char *vendor = NULL;
char *model = NULL;
const char *prefix = sysfs_prefix ? sysfs_prefix : SYSFS_SCSI_DEVICES;
if (VIR_ALLOC(dev) < 0)
return NULL;
dev->bus = bus;
dev->target = target;
dev->unit = unit;
dev->readonly = readonly;
dev->shareable = shareable;
if (!(sg = virSCSIDeviceGetSgName(prefix, adapter, bus, target, unit)))
goto cleanup;
if (virSCSIDeviceGetAdapterId(adapter, &dev->adapter) < 0)
goto cleanup;
if (virAsprintf(&dev->name, "%d:%u:%u:%llu", dev->adapter,
dev->bus, dev->target, dev->unit) < 0 ||
virAsprintf(&dev->sg_path, "%s/%s",
sysfs_prefix ? sysfs_prefix : "/dev", sg) < 0)
goto cleanup;
if (!virFileExists(dev->sg_path)) {
virReportSystemError(errno,
_("SCSI device '%s': could not access %s"),
dev->name, dev->sg_path);
goto cleanup;
}
if (virAsprintf(&vendor_path,
"%s/%s/vendor", prefix, dev->name) < 0 ||
virAsprintf(&model_path,
"%s/%s/model", prefix, dev->name) < 0)
goto cleanup;
if (virFileReadAll(vendor_path, 1024, &vendor) < 0)
goto cleanup;
if (virFileReadAll(model_path, 1024, &model) < 0)
goto cleanup;
virTrimSpaces(vendor, NULL);
virTrimSpaces(model, NULL);
if (virAsprintf(&dev->id, "%s:%s", vendor, model) < 0)
goto cleanup;
ret = dev;
cleanup:
VIR_FREE(sg);
VIR_FREE(vendor);
VIR_FREE(model);
VIR_FREE(vendor_path);
VIR_FREE(model_path);
if (!ret)
virSCSIDeviceFree(dev);
return ret;
}
