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net: don't dump Tx and uninitialized NAPIs

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We use NAPI ID as the key for continuing dumps. We also depend
on the NAPIs being sorted by ID within the driver list. Tx NAPIs
(which don't have an ID assigned) break this expectation, it's
not currently possible to dump them reliably. Since Tx NAPIs
are relatively rare, and can't be used in doit (GET or SET)
hide them from the dump API as well.

Fixes: 27f91aaf49 ("netdev-genl: Add netlink framework functions for napi")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250103183207.1216004-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jakub Kicinski
2025-01-03 10:32:07 -08:00
committed by Paolo Abeni
parent 4c1224501e
commit fd48f071a3
1 changed files with 3 additions and 2 deletions
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net/core/netdev-genl.c
+3 -2
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@@ -176,8 +176,7 @@ netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi,
if (!hdr)
return -EMSGSIZE;
if (napi->napi_id >= MIN_NAPI_ID &&
nla_put_u32(rsp, NETDEV_A_NAPI_ID, napi->napi_id))
if (nla_put_u32(rsp, NETDEV_A_NAPI_ID, napi->napi_id))
goto nla_put_failure;
if (nla_put_u32(rsp, NETDEV_A_NAPI_IFINDEX, napi->dev->ifindex))
@@ -272,6 +271,8 @@ netdev_nl_napi_dump_one(struct net_device *netdev, struct sk_buff *rsp,
return err;
list_for_each_entry(napi, &netdev->napi_list, dev_list) {
if (napi->napi_id < MIN_NAPI_ID)
continue;
if (ctx->napi_id && napi->napi_id >= ctx->napi_id)
continue;