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* src/storage_backend_scsi.[ch]: add SCSI storage rescan support,

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patch by David Allan
daniel
This commit is contained in:
Daniel Veillard 2009-04-07 12:50:17 +00:00
parent 8536e697b6
commit b2df3510b7
3 changed files with 60 additions and 1 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
Tue Apr 7 14:48:35 CEST 2009 Daniel Veillard <veillard@redhat.com>
* src/storage_backend_scsi.[ch]: add SCSI storage rescan support,
patch by David Allan
Fri Apr 3 16:47:22 CEST 2009 Daniel Veillard <veillard@redhat.com>
* configure.in libvirt.spec.in NEWS docs/*: release of 0.6.2

55
src/storage_backend_scsi.c
View File

@ -565,6 +565,53 @@ out:
}
static int
virStorageBackendSCSITriggerRescan(virConnectPtr conn,
uint32_t host)
{
int fd = -1;
int retval = 0;
char *path;
VIR_DEBUG(_("Triggering rescan of host %d"), host);
if (virAsprintf(&path, "/sys/class/scsi_host/host%u/scan", host) < 0) {
virReportOOMError(conn);
retval = -1;
goto out;
}
VIR_DEBUG(_("Scan trigger path is '%s'"), path);
fd = open(path, O_WRONLY);
if (fd < 0) {
virReportSystemError(conn, errno,
_("Could not open '%s' to trigger host scan"),
path);
retval = -1;
goto free_path;
}
if (safewrite(fd,
LINUX_SYSFS_SCSI_HOST_SCAN_STRING,
sizeof(LINUX_SYSFS_SCSI_HOST_SCAN_STRING)) < 0) {
virReportSystemError(conn, errno,
_("Write to '%s' to trigger host scan failed"),
path);
retval = -1;
}
close(fd);
free_path:
VIR_FREE(path);
out:
VIR_DEBUG(_("Rescan of host %d complete"), host);
return retval;
}
static int
virStorageBackendSCSIRefreshPool(virConnectPtr conn,
virStoragePoolObjPtr pool)
@ -575,13 +622,19 @@ virStorageBackendSCSIRefreshPool(virConnectPtr conn,
pool->def->allocation = pool->def->capacity = pool->def->available = 0;
if (sscanf(pool->def->source.adapter, "host%u", &host) != 1) {
VIR_DEBUG(_("Failed to get host number from '%s'"), pool->def->source.adapter);
VIR_DEBUG(_("Failed to get host number from '%s'"),
pool->def->source.adapter);
retval = -1;
goto out;
}
VIR_DEBUG(_("Scanning host%u"), host);
if (virStorageBackendSCSITriggerRescan(conn, host) < 0) {
retval = -1;
goto out;
}
virStorageBackendSCSIFindLUs(conn, pool, host);
out:

1
src/storage_backend_scsi.h
View File

@ -28,6 +28,7 @@
#define LINUX_SYSFS_SCSI_HOST_PREFIX "/sys/class/scsi_host"
#define LINUX_SYSFS_SCSI_HOST_POSTFIX "device"
#define LINUX_SYSFS_SCSI_HOST_SCAN_STRING "- - -"
extern virStorageBackend virStorageBackendSCSI;