[ndctl,rebased,2/3] ndctl/namespace: Suppress -ENXIO when processing all namespaces.

Commit Message

Michal Suchánek Jan. 6, 2021, 1:17 p.m. UTC

When processing all namespaces and no namespaces exist user gets the
default -ENXIO. Set default rc to 0 when processing all namespaces.
This avoids confusing error message printed in addition to the message
saying 0 namespaces were affected.

Before:

 # ndctl check-namespace all
namespace0.0: namespace_check: namespace0.0: check aborted, namespace online
error checking namespaces: Device or resource busy
checked 0 namespaces
 # ndctl disable-namespace all
disabled 1 namespace
 # ndctl check-namespace all
namespace0.0: namespace_check: Unable to recover any BTT info blocks
error checking namespaces: No such device or address
checked 0 namespaces
 # ndctl destroy-namespace all
destroyed 1 namespace
 # ndctl check-namespace all
error checking namespaces: No such device or address
checked 0 namespaces
 # ndctl destroy-namespace all
error destroying namespaces: No such device or address
destroyed 0 namespaces

After:

 # ndctl check-namespace all
namespace0.0: namespace_check: namespace0.0: check aborted, namespace online
error checking namespaces: Device or resource busy
checked 0 namespaces
 # ndctl disable-namespace namespace0.0
disabled 1 namespace
 # ndctl check-namespace all
namespace0.0: namespace_check: Unable to recover any BTT info blocks
error checking namespaces: No such device or address
checked 0 namespaces
 # ndctl destroy-namespace all
destroyed 1 namespace
 # ndctl check-namespace all
checked 0 namespaces
 # ndctl destroy-namespace all
destroyed 0 namespaces
 # ndctl destroy-namespace all
destroyed 0 namespaces

Note: this does change the return value from -ENXIO to 0 in the cases
when no namespaces exist and processing all namespaces was requested.

Link: https://patchwork.kernel.org/patch/11681431/
Signed-off-by: Michal Suchanek <[e-mail]>
Reviewed-by: Santosh S <[e-mail]>
---
v2: fix the error code references in the commit message
---
 ndctl/namespace.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/ndctl/namespace.c b/ndctl/namespace.c
index b9ffd21fe7bf..c3a058d8ff1a 100644
--- a/ndctl/namespace.c
+++ b/ndctl/namespace.c
@@ -2148,6 +2148,9 @@  static int do_xaction_namespace(const char *namespace,
 	if (!namespace && action != ACTION_CREATE)
 		return rc;
 
+	if (namespace && (strcmp(namespace, "all") == 0))
+		rc = 0;
+
 	if (verbose)
 		ndctl_set_log_priority(ctx, LOG_DEBUG);