NFSD: Put cache get-reqs dump attrs under reply

The new get-reqs dump operations added to sunrpc_cache.yaml and
nfsd.yaml place the "requests" nested attribute under dump.request.
A netlink dump carries an empty request; its payload travels back
in the reply. Because the spec names no reply attributes, the YNL
C code generator synthesizes a forward reference to a
<op>_rsp struct that is never defined, breaking any consumer of
these specs.

This first surfaced when Thorsten Leemhuis built tools/net/ynl
against -next:

  nfsd-user.h:746: error: field 'obj' has incomplete type
    struct nfsd_svc_export_get_reqs_rsp obj ...
  nfsd-user.h:826: error: field 'obj' has incomplete type
    struct nfsd_expkey_get_reqs_rsp obj ...
  nfsd-user.c:1211: error: 'nfsd_svc_export_get_reqs_rsp_parse'
    undeclared

sunrpc_cache.yaml has the same defect in ip-map-get-reqs and
unix-gid-get-reqs, but nfsd.yaml errors out first in the Makefile's
alphabetical build order and hides the sunrpc failures.

These bugs were introduced by incorrect merge conflict resolution.

Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
Closes: https://lore.kernel.org/linux-nfs/f6a3ca6d-e5cb-4a5c-9af2-8d2b1ce33ef0@leemhuis.info/
Fixes: 1045ccf519ce30 ("sunrpc: add netlink upcall for the auth.unix.ip cache")
Tested-by: Thorsten Leemhuis <linux@leemhuis.info>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

4 files changed, 16 insertions, 44 deletions

diff --git a/Documentation/netlink/specs/nfsd.yaml b/Documentation/netlink/specs/nfsd.yaml
index 40eca7c15680..25497b533185 100644
--- a/Documentation/netlink/specs/nfsd.yaml
+++ b/Documentation/netlink/specs/nfsd.yaml
@@ -416,7 +416,7 @@ operations:
       attribute-set: svc-export-reqs
       flags: [admin-perm]
       dump:
-          request:
+          reply:
             attributes:
               - requests
     -
@@ -434,7 +434,7 @@ operations:
       attribute-set: expkey-reqs
       flags: [admin-perm]
       dump:
-          request:
+          reply:
             attributes:
               - requests
     -
diff --git a/Documentation/netlink/specs/sunrpc_cache.yaml b/Documentation/netlink/specs/sunrpc_cache.yaml
index 55dabc914dbc..f22ff22b9418 100644
--- a/Documentation/netlink/specs/sunrpc_cache.yaml
+++ b/Documentation/netlink/specs/sunrpc_cache.yaml
@@ -101,7 +101,7 @@ operations:
       attribute-set: ip-map-reqs
       flags: [admin-perm]
       dump:
-          request:
+          reply:
             attributes:
               - requests
     -
@@ -119,7 +119,7 @@ operations:
       attribute-set: unix-gid-reqs
       flags: [admin-perm]
       dump:
-          request:
+          reply:
             attributes:
               - requests
     -
diff --git a/fs/nfsd/netlink.c b/fs/nfsd/netlink.c
index 30c4f8be3df9..f99add477cc7 100644
--- a/fs/nfsd/netlink.c
+++ b/fs/nfsd/netlink.c
@@ -88,21 +88,11 @@ static const struct nla_policy nfsd_pool_mode_set_nl_policy[NFSD_A_POOL_MODE_MOD
 	[NFSD_A_POOL_MODE_MODE] = { .type = NLA_NUL_STRING, },
 };
 
-/* NFSD_CMD_SVC_EXPORT_GET_REQS - dump */
-static const struct nla_policy nfsd_svc_export_get_reqs_nl_policy[NFSD_A_SVC_EXPORT_REQS_REQUESTS + 1] = {
-	[NFSD_A_SVC_EXPORT_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_svc_export_nl_policy),
-};
-
 /* NFSD_CMD_SVC_EXPORT_SET_REQS - do */
 static const struct nla_policy nfsd_svc_export_set_reqs_nl_policy[NFSD_A_SVC_EXPORT_REQS_REQUESTS + 1] = {
 	[NFSD_A_SVC_EXPORT_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_svc_export_nl_policy),
 };
 
-/* NFSD_CMD_EXPKEY_GET_REQS - dump */
-static const struct nla_policy nfsd_expkey_get_reqs_nl_policy[NFSD_A_EXPKEY_REQS_REQUESTS + 1] = {
-	[NFSD_A_EXPKEY_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_expkey_nl_policy),
-};
-
 /* NFSD_CMD_EXPKEY_SET_REQS - do */
 static const struct nla_policy nfsd_expkey_set_reqs_nl_policy[NFSD_A_EXPKEY_REQS_REQUESTS + 1] = {
 	[NFSD_A_EXPKEY_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_expkey_nl_policy),
@@ -169,11 +159,9 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
 		.flags	= GENL_CMD_CAP_DO,
 	},
 	{
-		.cmd		= NFSD_CMD_SVC_EXPORT_GET_REQS,
-		.dumpit		= nfsd_nl_svc_export_get_reqs_dumpit,
-		.policy		= nfsd_svc_export_get_reqs_nl_policy,
-		.maxattr	= NFSD_A_SVC_EXPORT_REQS_REQUESTS,
-		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+		.cmd	= NFSD_CMD_SVC_EXPORT_GET_REQS,
+		.dumpit	= nfsd_nl_svc_export_get_reqs_dumpit,
+		.flags	= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 	},
 	{
 		.cmd		= NFSD_CMD_SVC_EXPORT_SET_REQS,
@@ -183,11 +171,9 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
 		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
 	},
 	{
-		.cmd		= NFSD_CMD_EXPKEY_GET_REQS,
-		.dumpit		= nfsd_nl_expkey_get_reqs_dumpit,
-		.policy		= nfsd_expkey_get_reqs_nl_policy,
-		.maxattr	= NFSD_A_EXPKEY_REQS_REQUESTS,
-		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+		.cmd	= NFSD_CMD_EXPKEY_GET_REQS,
+		.dumpit	= nfsd_nl_expkey_get_reqs_dumpit,
+		.flags	= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 	},
 	{
 		.cmd		= NFSD_CMD_EXPKEY_SET_REQS,
diff --git a/net/sunrpc/netlink.c b/net/sunrpc/netlink.c
index 5ccf0967809c..ce09ecc0faa2 100644
--- a/net/sunrpc/netlink.c
+++ b/net/sunrpc/netlink.c
@@ -29,21 +29,11 @@ const struct nla_policy sunrpc_unix_gid_nl_policy[SUNRPC_A_UNIX_GID_EXPIRY + 1]
 	[SUNRPC_A_UNIX_GID_EXPIRY] = { .type = NLA_U64, },
 };
 
-/* SUNRPC_CMD_IP_MAP_GET_REQS - dump */
-static const struct nla_policy sunrpc_ip_map_get_reqs_nl_policy[SUNRPC_A_IP_MAP_REQS_REQUESTS + 1] = {
-	[SUNRPC_A_IP_MAP_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_ip_map_nl_policy),
-};
-
 /* SUNRPC_CMD_IP_MAP_SET_REQS - do */
 static const struct nla_policy sunrpc_ip_map_set_reqs_nl_policy[SUNRPC_A_IP_MAP_REQS_REQUESTS + 1] = {
 	[SUNRPC_A_IP_MAP_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_ip_map_nl_policy),
 };
 
-/* SUNRPC_CMD_UNIX_GID_GET_REQS - dump */
-static const struct nla_policy sunrpc_unix_gid_get_reqs_nl_policy[SUNRPC_A_UNIX_GID_REQS_REQUESTS + 1] = {
-	[SUNRPC_A_UNIX_GID_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_unix_gid_nl_policy),
-};
-
 /* SUNRPC_CMD_UNIX_GID_SET_REQS - do */
 static const struct nla_policy sunrpc_unix_gid_set_reqs_nl_policy[SUNRPC_A_UNIX_GID_REQS_REQUESTS + 1] = {
 	[SUNRPC_A_UNIX_GID_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_unix_gid_nl_policy),
@@ -57,11 +47,9 @@ static const struct nla_policy sunrpc_cache_flush_nl_policy[SUNRPC_A_CACHE_FLUSH
 /* Ops table for sunrpc */
 static const struct genl_split_ops sunrpc_nl_ops[] = {
 	{
-		.cmd		= SUNRPC_CMD_IP_MAP_GET_REQS,
-		.dumpit		= sunrpc_nl_ip_map_get_reqs_dumpit,
-		.policy		= sunrpc_ip_map_get_reqs_nl_policy,
-		.maxattr	= SUNRPC_A_IP_MAP_REQS_REQUESTS,
-		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+		.cmd	= SUNRPC_CMD_IP_MAP_GET_REQS,
+		.dumpit	= sunrpc_nl_ip_map_get_reqs_dumpit,
+		.flags	= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 	},
 	{
 		.cmd		= SUNRPC_CMD_IP_MAP_SET_REQS,
@@ -71,11 +59,9 @@ static const struct genl_split_ops sunrpc_nl_ops[] = {
 		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
 	},
 	{
-		.cmd		= SUNRPC_CMD_UNIX_GID_GET_REQS,
-		.dumpit		= sunrpc_nl_unix_gid_get_reqs_dumpit,
-		.policy		= sunrpc_unix_gid_get_reqs_nl_policy,
-		.maxattr	= SUNRPC_A_UNIX_GID_REQS_REQUESTS,
-		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+		.cmd	= SUNRPC_CMD_UNIX_GID_GET_REQS,
+		.dumpit	= sunrpc_nl_unix_gid_get_reqs_dumpit,
+		.flags	= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 	},
 	{
 		.cmd		= SUNRPC_CMD_UNIX_GID_SET_REQS,