[PATCH] NFSD: Put cache get-reqs dump attrs under reply

Chuck Lever
2026-04-23T17:17:35Z

From: Chuck Lever <chuck.lever@oracle.com>

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")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
Documentation/netlink/specs/nfsd.yaml | 4 +--
Documentation/netlink/specs/sunrpc_cache.yaml | 4 +--
fs/nfsd/netlink.c | 26 +++++--------------
net/sunrpc/netlink.c | 26 +++++--------------
4 files changed, 16 insertions(+), 44 deletions(-)

diff --git a/Documentation/netlink/specs/nfsd.yaml b/Documentation/netlink/specs/nfsd.yaml
index 17e714ef683d..8f36fadd68f7 100644
--- a/Documentation/netlink/specs/nfsd.yaml
+++ b/Documentation/netlink/specs/nfsd.yaml
@@ -445,7 +445,7 @@ operations:
attribute-set: svc-export-reqs
flags: [admin-perm]
dump:
- request:
+ reply:
attributes:
- requests
-
@@ -463,7 +463,7 @@ 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 df5b0e2fb286..fbee3676d253 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),
@@ -184,11 +174,9 @@ 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,
@@ -198,11 +186,9 @@ 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,
--
2.53.0