From patchwork Mon Sep 11 12:49:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 13379270 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1B24F3D65 for ; Mon, 11 Sep 2023 12:50:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39166C433C8; Mon, 11 Sep 2023 12:50:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1694436609; bh=tHzf9IpTRRObT2Wt3tnU7xQFrfxfs3mf7RJ8SD6UTgk=; h=From:To:Cc:Subject:Date:From; b=giXe9f9PkYJf6xsj7SqiplLBd9eSD1v1yjrk9YCiV93a/XC0+Vvo+gfcvRTiaoU48 AzoCqKhcLJ+1CK7wKweXDpCjKyP4DAOmMyZmasWKdmRKwOOgcDf8ohsGGMuyjT0n45 odqgjihH6iO02MrjqyhfbRm5ybcCZ5L4PqkFCMGvrprboc6Wf1z7kY8VoWKexo5/E+ aqJxjF4fCGfOG2f9b4NlAyK+VA4H1N3j4+TygbmA0/O3sqLSggw3rOGqwzpnQFROnT AD8R9qw+Aum1gvwe1ym6vzvVH3hqhY64Rny51xFwJleurhhYIqjNe9Qq/UIrTbLDew 4YFIFQKy+s5xA== From: Lorenzo Bianconi To: linux-nfs@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, chuck.lever@oracle.com, jlayton@kernel.org, neilb@suse.de, netdev@vger.kernel.org Subject: [PATCH v8 0/3] add rpc_status netlink support for NFSD Date: Mon, 11 Sep 2023 14:49:43 +0200 Message-ID: X-Mailer: git-send-email 2.41.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Introduce rpc_status netlink support for NFSD in order to dump pending RPC requests debugging information from userspace. The new code can be tested with the user-space tool reported below: https://github.com/LorenzoBianconi/nfsd-rpc-netlink-monitor/tree/main Changes since v7: - introduce nfsd_server.yaml for netlink messages Changes since v6: - report info to user-space through netlink and get rid of the related entry in the procfs Changes since v5: - add missing delimiters for nfs4 compound ops - add a header line for rpc_status handler - do not dump rq_prog - do not dump rq_flags in hex Changes since v4: - rely on acquire/release APIs and get rid of atomic operation - fix kdoc for nfsd_rpc_status_open - get rid of ',' as field delimiter in nfsd_rpc_status hanlder - move nfsd_rpc_status before nfsd_v4 enum entries - fix compilantion error if nfsdv4 is not enabled Changes since v3: - introduce rq_status_counter in order to detect if the RPC request is pending and RPC info are stable - rely on __svc_print_addr to dump IP info Changes since v2: - minor changes in nfsd_rpc_status_show output Changes since v1: - rework nfsd_rpc_status_show output Changes since RFCv1: - riduce time holding nfsd_mutex bumping svc_serv refcoung in nfsd_rpc_status_open() - dump rqstp->rq_stime - add missing kdoc for nfsd_rpc_status_open() Link: https://bugzilla.linux-nfs.org/show_bug.cgi?id=3D3D3D366 Lorenzo Bianconi (3): Documentation: netlink: add a YAML spec for nfsd_server NFSD: introduce netlink rpc_status stubs NFSD: add rpc_status netlink support Documentation/netlink/specs/nfsd_server.yaml | 97 +++++++++ fs/nfsd/Makefile | 3 +- fs/nfsd/nfs_netlink_gen.c | 32 +++ fs/nfsd/nfs_netlink_gen.h | 22 ++ fs/nfsd/nfsctl.c | 204 +++++++++++++++++++ fs/nfsd/nfsd.h | 16 ++ fs/nfsd/nfssvc.c | 15 ++ fs/nfsd/state.h | 2 - include/linux/sunrpc/svc.h | 1 + include/uapi/linux/nfsd_server.h | 49 +++++ 10 files changed, 438 insertions(+), 3 deletions(-) create mode 100644 Documentation/netlink/specs/nfsd_server.yaml create mode 100644 fs/nfsd/nfs_netlink_gen.c create mode 100644 fs/nfsd/nfs_netlink_gen.h create mode 100644 include/uapi/linux/nfsd_server.h