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Miller" , Eric Dumazet , Paolo Abeni , Sridhar Samudrala , Stanislav Fomichev , Daniel Jurgens , linux-kernel@vger.kernel.org (open list) Subject: [PATCH net] netdev-genl: Set extack and fix error on napi-get Date: Sat, 31 Aug 2024 12:17:04 +0000 Message-Id: <20240831121707.17562-1-jdamato@fastly.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In commit 27f91aaf49b3 ("netdev-genl: Add netlink framework functions for napi"), when an invalid NAPI ID is specified the return value -EINVAL is used and no extack is set. Change the return value to -ENOENT and set the extack. Before this commit: $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ --do napi-get --json=3D'{"id": 451}' Netlink error: Invalid argument nl_len =3D 36 (20) nl_flags =3D 0x100 nl_type =3D 2 error: -22 After this commit: $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ --do napi-get --json=3D'{"id": 451}' Netlink error: No such file or directory nl_len =3D 44 (28) nl_flags =3D 0x300 nl_type =3D 2 error: -2 extack: {'bad-attr': '.id'} Cc: Amritha Nambiar Cc: stable@kernel.org Suggested-by: Jakub Kicinski Fixes: 27f91aaf49b3 ("netdev-genl: Add netlink framework functions for napi= ") Signed-off-by: Joe Damato --- net/core/netdev-genl.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c index 05f9515d2c05..a17d7eaeb001 100644 --- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -216,10 +216,12 @@ int netdev_nl_napi_get_doit(struct sk_buff *skb, stru= ct genl_info *info) rtnl_lock(); =20 napi =3D napi_by_id(napi_id); - if (napi) + if (napi) { err =3D netdev_nl_napi_fill_one(rsp, napi, info); - else - err =3D -EINVAL; + } else { + NL_SET_BAD_ATTR(info->extack, info->attrs[NETDEV_A_NAPI_ID]); + err =3D -ENOENT; + } =20 rtnl_unlock(); =20 --=20 2.25.1