[libvirt] [PATCH v3 3/4] scsi: Adjust return value for virStorageBackendSCSINewLun
Use virStorageBackendPoolUseDevPath API to determine whether creation of
stable target path is possible for the volume. If not, then return failure.
This will differentiate a failed virStorageBackendStablePath which won't
need to be fatal. Thus, we'll add a -2 return value to differentiate that
the failure was a result of either the inability to find the symlink for
the device or failure to open the target path directory
Signed-off-by: John Ferlan <jferlan(a)redhat.com>
---
src/storage/storage_backend_scsi.c | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
diff --git a/src/storage/storage_backend_scsi.c b/src/storage/storage_backend_scsi.c
index b96caec..d3c6470 100644
--- a/src/storage/storage_backend_scsi.c
+++ b/src/storage/storage_backend_scsi.c
@@ -146,6 +146,16 @@ virStorageBackendSCSISerial(const char *dev)
}
+/*
+ * Attempt to create a new LUN
+ *
+ * Returns:
+ *
+ * 0 => Success
+ * -1 => Failure due to some sort of OOM or other fatal issue found when
+ * attempting to get/update information about a found volume
+ * -2 => Failure to find a stable path, not fatal, caller can try another
+ */
static int
virStorageBackendSCSINewLun(virStoragePoolObjPtr pool,
uint32_t host ATTRIBUTE_UNUSED,
@@ -158,6 +168,18 @@ virStorageBackendSCSINewLun(virStoragePoolObjPtr pool,
char *devpath = NULL;
int retval = -1;
+ /* Before we get too far - let's see if the pool is using target path
+ * starting with /dev. Attempts to find a stable path not based on a
+ * pool target starting with /dev will fail and do lots of unnecessary
+ * work - so we'll short circuit here.
+ */
+ if (!virStorageBackendPoolUseDevPath(pool)) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("unable to use target path '%s' for dev
'%s'"),
+ NULLSTR(pool->def->target.path), dev);
+ goto cleanup;
+ }
+
if (VIR_ALLOC(vol) < 0)
goto cleanup;
@@ -187,13 +209,12 @@ virStorageBackendSCSINewLun(virStoragePoolObjPtr pool,
true)) == NULL)
goto cleanup;
- if (STREQ(devpath, vol->target.path) &&
- !(STREQ(pool->def->target.path, "/dev") ||
- STREQ(pool->def->target.path, "/dev/"))) {
+ if (STREQ(devpath, vol->target.path)) {
VIR_DEBUG("No stable path found for '%s' in '%s'",
devpath, pool->def->target.path);
+ retval = -2;
goto cleanup;
}
--
2.1.0