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From 9bd2994f91bb77604521cbe09a76a51d092c2cfd Mon Sep 17 00:00:00 2001
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From: Michal Suchanek <msuchanek@suse.de>
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Date: Wed, 6 Jan 2021 14:17:40 +0100
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Subject: [PATCH 028/217] ndctl/namespace: Skip seed namespaces when processing
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all namespaces.
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The seed namespaces are exposed by the kernel but most operations are
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not valid on seed namespaces.
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When processing all namespaces the user gets confusing errors from ndctl
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trying to process seed namespaces. The kernel does not provide any way
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to tell that a namspace is seed namespace but skipping namespaces with
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zero size and UUID is a good heuristic.
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The user can still specify the namespace by name directly in case
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processing it is desirable.
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Link: https://patchwork.kernel.org/patch/11473645/
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Link: https://lore.kernel.org/r/e55ae2c17b8b9c3288491efe6214338118e8c5ae.1609938610.git.msuchanek@suse.de
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Fixes: #41
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Tested-by: Harish Sriram <harish@linux.ibm.com>
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Reviewed-by: Santosh S <santosh@fossix.org>
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Signed-off-by: Michal Suchanek <msuchanek@suse.de>
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Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
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---
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ndctl/namespace.c | 16 +++++++++++++---
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1 file changed, 13 insertions(+), 3 deletions(-)
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diff --git a/ndctl/namespace.c b/ndctl/namespace.c
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index 1e8a2cd..5e65ed5 100644
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--- a/ndctl/namespace.c
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+++ b/ndctl/namespace.c
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@@ -2210,9 +2210,19 @@ static int do_xaction_namespace(const char *namespace,
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ndctl_namespace_foreach_safe(region, ndns, _n) {
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ndns_name = ndctl_namespace_get_devname(ndns);
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- if (strcmp(namespace, "all") != 0
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- && strcmp(namespace, ndns_name) != 0)
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- continue;
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+ if (strcmp(namespace, "all") == 0) {
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+ static const uuid_t zero_uuid;
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+ uuid_t uuid;
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+
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+ ndctl_namespace_get_uuid(ndns, uuid);
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+ if (!ndctl_namespace_get_size(ndns) &&
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+ !memcmp(uuid, zero_uuid, sizeof(uuid_t)))
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+ continue;
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+ } else {
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+ if (strcmp(namespace, ndns_name) != 0)
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+ continue;
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+ }
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+
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switch (action) {
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case ACTION_DISABLE:
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rc = ndctl_namespace_disable_safe(ndns);
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--
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2.27.0
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