From patchwork Fri Mar 1 18:18:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthieu Baerts \(NGI0\)" X-Patchwork-Id: 777231 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 CABB63EA95; Fri, 1 Mar 2024 18:19:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709317148; cv=none; b=cbRc1SOsy4jMcle5DvajSBKLr4sXg/C8At14W53XwLJpAyd6MiI+tXRn2bIVGNtjwB2VTzBtsX9UGcnV+KOgEC3HAR4E11ndMSoW0z+kCCzFNOrjRwE91blMqKzzh73HSarGRp1202I3W4Q53P7vr9H21RY12A/MdTQvKkSlD0s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709317148; c=relaxed/simple; bh=tHamsSu2PawSNJB14dKAoQh031PkcNlcqRe8m9+N4mc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=E6S57sNVpi65bDQSUfZqFOHFLQyLL2Y08lKrM8P5464p2fVbxJI6rWC/zf8y8LyRc3K9M6YJlN/u2RrqoTBLcU58PNjT14cHgnhmXT5PeU+9tMocuHPxizT29XheP7T6aPMQVfEOurIt0bJhBnRPBpkaXIJNCEKA+YxIkYfrnl4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Nmf2yNpu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Nmf2yNpu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 218B8C43390; Fri, 1 Mar 2024 18:19:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1709317148; bh=tHamsSu2PawSNJB14dKAoQh031PkcNlcqRe8m9+N4mc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Nmf2yNpujL2CHG661S5q7iJdLcHamibB9G2a5K33DMTKqnxKmm6fOrxxfpnNcBvEr 9bbQdwHvUZ+Ll8fCUX3fvqeT1xX1jbgeYTB6D2Q4wzwFoypR5fldRNdyHL6c8jbhJx 8la90ah2+OOV565Z/3gtGHwQvoi5L8b1mAyVMhKCGZm0wFBCI+h31Hqx6YK/q6y0Kr jL85E0CFl1BRdGtgKrEeTGOW2y7rdbI6lFRzQ0pgDnEmx26WQtWGrHuvYGp8SKMBVh 8BrQRp1CpJxBuIiAz5d8eVyCTHoOT+a2kDscxOU+CWK4449HnDrXvLe652W04zdUQH FbhIKlDKrZUvQ== From: "Matthieu Baerts (NGI0)" Date: Fri, 01 Mar 2024 19:18:36 +0100 Subject: [PATCH net-next 12/15] mptcp: implement mptcp_userspace_pm_get_addr Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240301-upstream-net-next-20240301-mptcp-userspace-pm-dump-addr-v1-12-dc30a420b3a0@kernel.org> References: <20240301-upstream-net-next-20240301-mptcp-userspace-pm-dump-addr-v1-0-dc30a420b3a0@kernel.org> In-Reply-To: <20240301-upstream-net-next-20240301-mptcp-userspace-pm-dump-addr-v1-0-dc30a420b3a0@kernel.org> To: mptcp@lists.linux.dev, Mat Martineau , Geliang Tang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan Cc: Geliang Tang , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, "Matthieu Baerts (NGI0)" X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3385; i=matttbe@kernel.org; h=from:subject:message-id; bh=XPYkNYFkRqDS+13nMn34SF5wNQUL95yNz7wdaGXQ2tw=; b=owEBbQKS/ZANAwAIAfa3gk9CaaBzAcsmYgBl4hv14pbx2noDI54Mo4L2YVHo34EtkFMByEi9M E9TS62MN92JAjMEAAEIAB0WIQToy4X3aHcFem4n93r2t4JPQmmgcwUCZeIb9QAKCRD2t4JPQmmg cyc1D/9R+4npbNXeI6GHXHnqxjS7MlLAgkJv6RXNzICibMNDOPUQzi/SBC0j8dCMwTka1bOqYCz zSRZOnNKL80pYLxVQ+qgjYYNDoo5NkbX5sRBb4Jp4BdcTSLVC/KcVxdMXqRx7HmSo1swqf7EYs9 GxGHJc3NVLep7oq77qlaycUE0Jq452W46yFrpjvbynf7BgpKi6U6qoTBdoGl7vS+RLnKxFg1rPv hihfxbbAis2pst6aQfi7IjCJlTzyh5v9l2RBBk/m52m9tV7Kq/B99s4pKMe6IVf3zniuAvXlSwu 06+Hox4O1g8uTeGrhZ498TjPW4GI3nthvQ9bg/xrPNWQaKB+dWy8EZh03lMoK8oyD6gBN1Oi4s+ Ae6zq5rIJPLxkqDA3g2WKyPwUCDUNDU8o+8ot7FblQxb0IuoN4NLndvcdwQmk2BAYFDMLl4l4Fk Ks7+Sd6oseNHdk2jMxE3nZPakmHN5Pe+9su/pRBohHHWGB0dBSwiOvCSX1GXmO/CqaHB3HeFYo3 GCRG1xQpKP5GZaRTY21AeQprLZt88xqTnwF2wjBCT/+Y0IKpvVfLUbKL/s1f6Odf2EXNi+k9kzT zGbUA8av9eMv9ZG/INYIFyHEuS1Krz/9MarP4CAOcJ/ewhb2nBHa5+9cSkZtCzGxZElUsX8SUSa rwZzz0pz/6fPSwQ== X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 From: Geliang Tang This patch implements mptcp_userspace_pm_get_addr() to get an address from userspace pm address list according the given 'token' and 'id'. Use nla_get_u32() to get the u32 value of 'token', then pass it to mptcp_token_get_sock() to get the msk. Pass 'msk' and 'id' to the helper mptcp_userspace_pm_lookup_addr_by_id() to get the address entry. Put this entry to userspace using mptcp_pm_nl_put_entry_info(). Signed-off-by: Geliang Tang Reviewed-by: Matthieu Baerts (NGI0) Reviewed-by: Mat Martineau Signed-off-by: Matthieu Baerts (NGI0) --- net/mptcp/pm_userspace.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++ net/mptcp/protocol.h | 2 ++ 2 files changed, 76 insertions(+) diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 20cbcb62cd8c..b9809d988693 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -638,3 +638,77 @@ int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, sock_put(sk); return ret; } + +int mptcp_userspace_pm_get_addr(struct sk_buff *skb, + struct genl_info *info) +{ + struct nlattr *attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR]; + struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; + struct mptcp_pm_addr_entry addr, *entry; + struct net *net = sock_net(skb->sk); + struct mptcp_sock *msk; + struct sk_buff *msg; + int ret = -EINVAL; + struct sock *sk; + void *reply; + + msk = mptcp_token_get_sock(net, nla_get_u32(token)); + if (!msk) { + NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); + return ret; + } + + sk = (struct sock *)msk; + + if (!mptcp_pm_is_userspace(msk)) { + GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); + goto out; + } + + ret = mptcp_pm_parse_entry(attr, info, false, &addr); + if (ret < 0) + goto out; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) { + ret = -ENOMEM; + goto out; + } + + reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0, + info->genlhdr->cmd); + if (!reply) { + GENL_SET_ERR_MSG(info, "not enough space in Netlink message"); + ret = -EMSGSIZE; + goto fail; + } + + lock_sock(sk); + spin_lock_bh(&msk->pm.lock); + entry = mptcp_userspace_pm_lookup_addr_by_id(msk, addr.addr.id); + if (!entry) { + GENL_SET_ERR_MSG(info, "address not found"); + ret = -EINVAL; + goto unlock_fail; + } + + ret = mptcp_nl_fill_addr(msg, entry); + if (ret) + goto unlock_fail; + + genlmsg_end(msg, reply); + ret = genlmsg_reply(msg, info); + spin_unlock_bh(&msk->pm.lock); + release_sock(sk); + sock_put(sk); + return ret; + +unlock_fail: + spin_unlock_bh(&msk->pm.lock); + release_sock(sk); +fail: + nlmsg_free(msg); +out: + sock_put(sk); + return ret; +} diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 69338a6c040f..bf708ddbef5f 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -1047,6 +1047,8 @@ int mptcp_pm_nl_dump_addr(struct sk_buff *msg, struct netlink_callback *cb); int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, struct netlink_callback *cb); +int mptcp_userspace_pm_get_addr(struct sk_buff *skb, + struct genl_info *info); static inline u8 subflow_get_local_id(const struct mptcp_subflow_context *subflow) {