From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C2BC239E6C; Tue, 16 Jun 2026 12:45:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781613946; cv=none; b=uVuqYNTWMJ9PrxclKO+5cjXhXJ4B0YF4O3NOJhA6NHpbTRGiU4DBZrEHqHqp4URps0tV6LIsalk24yWrG06FlmUvpGle8bvCdLR+m1BEZjMSVbxG5hPMLSDkd7TPrPWbsE3DDT8uzR8QePaEr3JT4BPAobgBqcLbvLQRnTsXGBw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781613946; c=relaxed/simple; bh=KZgToN0i1gMbI5vQga8B4nQkwpSgV9eroO58XYOzkTo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Jp5jbLmfM7+fsQTq+u0w93a1bVk4+hXmSK2R79vCfEO6utkYpVSFSH5jHXhBMH4kAiSnJCjtdfzh5aYs4t11j+DmGgSYzIfT8j8og0lcxlvBvk4iQA4gwgqjwtTCDXy7/WqT2dYlU7Cbsfmic8mfsBiwv4k/ThiatFPsQINfX9w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OMxL0V1E; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OMxL0V1E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F0D21F00A3E; Tue, 16 Jun 2026 12:45:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781613945; bh=hD03CktBmJm9PueyGnisOj08erlSq9J3gQrM2AtOTWU=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=OMxL0V1ENbkE/3X7Nm6J1vC0g2JRqSbqty0y4GQgpSP2vYWi8qUECPlM6VZox+Soz TakSOmFRZ1n312NhPqkXSceUjjdOjGgowokSS7vs5QgImPjoyI21WX13dbKEs/8ffi oFGqKnoP8/al7uyJHRPx+/YOA6ayYB9vAfpN6TGZZNNQEp/ICfMhEqpp3weLWRHseT egaGqMgQAKk5KwwsOIPRxbhLuEm6eaWbkXCEzpIEmhmNPga6IRb4gD7/7JdteWmE7K xDllqF5RfHzqWJBQWxHhTHpt4jxnIoOr8KjxBBd8wXT6KtPW4HkDLUTJfqOUQtTwKx WLl2JF4/K2p+w== From: Jeff Layton Date: Tue, 16 Jun 2026 08:45:33 -0400 Subject: [PATCH v4 1/4] sunrpc: add per-netns per-procedure call counts to svc_stat Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260616-exportd-netlink-v4-1-03505aee3883@kernel.org> References: <20260616-exportd-netlink-v4-0-03505aee3883@kernel.org> In-Reply-To: <20260616-exportd-netlink-v4-0-03505aee3883@kernel.org> To: NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Chuck Lever Cc: Trond Myklebust , Anna Schumaker , Steve Dickson , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=5361; i=jlayton@kernel.org; h=from:subject:message-id; bh=KZgToN0i1gMbI5vQga8B4nQkwpSgV9eroO58XYOzkTo=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBqMUV2s6ZtwOowvWV0fOtjpHMATKiF0oCD+aWf0 O6lP6ZIpf2JAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCajFFdgAKCRAADmhBGVaC FXl6D/0WsC6QblageKl1lOnWncOHtEPbWfA6ZQ3tOmC/neuhVdGsiLrzMnzJ6jI06yTPZCUyq/G KbF0pBCXxm+jDgJqhlcFgoBGyg6qvME9lKjXqKa9bXcAe8ajll9quiXogm3n9E30tlwQiRjiBXx 2txuNWbCTdXEGg+XA0fDoSO2zj2TAC9fWxqYd+FUSuXO4gzQXC7qpGuTPoSm3pEPNwEENPgy7hB Ed7jM9iwjrJ+i4XN0ucf7o/7yjdHCeDjbynYX+ud2Ae6xIzJCehlSPHoVStFOTt7l9RDiCSgPCd vT3gYBG0gvh6UZHe5bIfCx1OIvOkf9sbkOXUkEfUasKOJI+HrjrQXDcBbpin2f+syd8DJbNcO8B cY9aawh7in0E8ew3vluBCu8iR/Gfu/d0VxYrbicBL2hnMNomHOgETOGkGG/+NMZRLjThZOCKcWQ 65MAzbr4bHwN3xSlqm18KPofcgbtPzPYYQTT5hsWEym0IpbL9uTm9AdUsMhR9rIfBcNDA3lE23e hPqrKr0CC/6wl7RPJlgw4RYnyVaOtnEXQNO+UWKLQ2UC7/7bjnk1imKBROhFcy1h9cwCVQ8e2xr InvZJ4ZH1X89+eSDZo0SClmoqQprMAovPE+1tTM0thO2XpMy0pJD/SJBi2CnpJbAebokMj8+Bqe /sEFP5tekN7yxRA== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 The existing per-procedure call counts live in global svc_version->vs_count[] arrays which are not network-namespace-aware. Add per-netns equivalents in struct svc_stat so the upcoming netlink stats interface can return namespace-scoped statistics. Add a vs_count pointer array to struct svc_stat, along with svc_stat_alloc_counts() and svc_stat_free_counts() helpers to manage per-version percpu call count arrays. Increment the per-net counter alongside the global one in svc_generic_init_request(). Call the alloc/free helpers from nfsd_net_init() and nfsd_net_exit(). Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Jeff Layton --- fs/nfsd/nfsctl.c | 8 ++++++- include/linux/sunrpc/stats.h | 6 +++++ net/sunrpc/stats.c | 54 ++++++++++++++++++++++++++++++++++++++++++++ net/sunrpc/svc.c | 8 +++++++ 4 files changed, 75 insertions(+), 1 deletion(-) diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index caf59421f8f4..601301e34fc7 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -2514,9 +2514,12 @@ static __net_init int nfsd_net_init(struct net *net) memset(&nn->nfsd_svcstats, 0, sizeof(nn->nfsd_svcstats)); nn->nfsd_svcstats.program = &nfsd_programs[0]; + retval = svc_stat_alloc_counts(&nn->nfsd_svcstats); + if (retval) + goto out_proc_error; if (!nfsd_proc_stat_init(net)) { retval = -ENOMEM; - goto out_proc_error; + goto out_svcstats_error; } for (i = 0; i < sizeof(nn->nfsd_versions); i++) @@ -2534,6 +2537,8 @@ static __net_init int nfsd_net_init(struct net *net) #endif return 0; +out_svcstats_error: + svc_stat_free_counts(&nn->nfsd_svcstats); out_proc_error: percpu_counter_destroy_many(nn->counter, NFSD_STATS_COUNTERS_NUM); out_repcache_error: @@ -2574,6 +2579,7 @@ static __net_exit void nfsd_net_exit(struct net *net) kfree_sensitive(nn->fh_key); nfsd_net_cb_shutdown(nn); nfsd_proc_stat_shutdown(net); + svc_stat_free_counts(&nn->nfsd_svcstats); percpu_counter_destroy_many(nn->counter, NFSD_STATS_COUNTERS_NUM); nfsd_idmap_shutdown(net); nfsd_export_shutdown(net); diff --git a/include/linux/sunrpc/stats.h b/include/linux/sunrpc/stats.h index 3ce1550d1beb..087ade905e29 100644 --- a/include/linux/sunrpc/stats.h +++ b/include/linux/sunrpc/stats.h @@ -37,9 +37,15 @@ struct svc_stat { rpcbadfmt, rpcbadauth, rpcbadclnt; + + /* Per-version per-procedure call counts (per-cpu, per-netns) */ + unsigned long __percpu **vs_count; }; struct net; +int svc_stat_alloc_counts(struct svc_stat *statp); +void svc_stat_free_counts(struct svc_stat *statp); + #ifdef CONFIG_PROC_FS int rpc_proc_init(struct net *); void rpc_proc_exit(struct net *); diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c index 7093e18ac26c..5bcecd2919b1 100644 --- a/net/sunrpc/stats.c +++ b/net/sunrpc/stats.c @@ -116,6 +116,60 @@ void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) } EXPORT_SYMBOL_GPL(svc_seq_show); +/** + * svc_stat_alloc_counts - allocate per-netns per-version call count arrays + * @statp: svc_stat whose vs_count arrays should be allocated + * + * statp->program must be set before calling this. + * + * Returns zero on success, or a negative errno otherwise. + */ +int svc_stat_alloc_counts(struct svc_stat *statp) +{ + struct svc_program *prog = statp->program; + unsigned int i; + + statp->vs_count = kcalloc(prog->pg_nvers, + sizeof(unsigned long __percpu *), + GFP_KERNEL); + if (!statp->vs_count) + return -ENOMEM; + + for (i = 0; i < prog->pg_nvers; i++) { + if (!prog->pg_vers[i]) + continue; + statp->vs_count[i] = __alloc_percpu(prog->pg_vers[i]->vs_nproc * + sizeof(unsigned long), + sizeof(unsigned long)); + if (!statp->vs_count[i]) + goto err; + } + return 0; +err: + svc_stat_free_counts(statp); + return -ENOMEM; +} +EXPORT_SYMBOL_GPL(svc_stat_alloc_counts); + +/** + * svc_stat_free_counts - free per-netns per-version call count arrays + * @statp: svc_stat whose vs_count arrays should be freed + */ +void svc_stat_free_counts(struct svc_stat *statp) +{ + struct svc_program *prog = statp->program; + unsigned int i; + + if (!statp->vs_count) + return; + + for (i = 0; i < prog->pg_nvers; i++) + free_percpu(statp->vs_count[i]); + kfree(statp->vs_count); + statp->vs_count = NULL; +} +EXPORT_SYMBOL_GPL(svc_stat_free_counts); + /** * rpc_alloc_iostats - allocate an rpc_iostats structure * @clnt: RPC program, version, and xprt diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index dd80a2eaaa74..f748004835f7 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -1438,6 +1438,14 @@ svc_generic_init_request(struct svc_rqst *rqstp, /* Bump per-procedure stats counter */ this_cpu_inc(versp->vs_count[rqstp->rq_proc]); + /* Bump per-net per-procedure stats counter */ + if (rqstp->rq_server->sv_stats && + rqstp->rq_server->sv_stats->program == progp && + rqstp->rq_server->sv_stats->vs_count && + rqstp->rq_server->sv_stats->vs_count[rqstp->rq_vers]) + this_cpu_inc(rqstp->rq_server->sv_stats->vs_count + [rqstp->rq_vers][rqstp->rq_proc]); + ret->dispatch = versp->vs_dispatch; return rpc_success; err_bad_vers: -- 2.54.0