[stgt] [PATCH 1/3] Allow creating SBC devices without any media loaded.

[Ronnie Sahlberg]

When creating a device that is supposed to have a backing file
but no path was provided. Treat this as creating a removable device
without any media loaded.
Set removable=1 and make sure online=0 to indicate this is a
removable device and that all media access commands will fail with
check-condition/not ready/medium not present.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg at gmail.com>
---
 usr/target.c |    6 +++---
 usr/tgtadm.c |    3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/usr/target.c b/usr/target.c
index dd4b358..fad6801 100644
--- a/usr/target.c
+++ b/usr/target.c
@@ -586,9 +586,9 @@ int tgt_device_create(int tid, int dev_type, uint64_t lun, char *params,
 			goto fail_lu_init;
 	}
 
-	if (backing && !path && !lu->attrs.removable) {
-		ret = TGTADM_INVALID_REQUEST;
-		goto fail_bs_init;
+	if (backing && !path) {
+		lu->attrs.removable = 1;
+		lu->attrs.online    = 0;
 	}
 
 	if (backing && path) {
diff --git a/usr/tgtadm.c b/usr/tgtadm.c
index 7dca0f8..26c82bc 100644
--- a/usr/tgtadm.c
+++ b/usr/tgtadm.c
@@ -779,7 +779,8 @@ int main(int argc, char **argv)
 					  "allowed/supported\n", rc);
 				exit(EINVAL);
 			}
-			if (!path && dev_type != TYPE_MMC) {
+			if (!path && dev_type != TYPE_MMC
+			    && dev_type != TYPE_DISK) {
 				eprintf("'backing-store' option "
 						"is necessary\n");
 				exit(EINVAL);
-- 
1.7.3.1

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