From patchwork Tue Oct 22 09:14:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13845386 X-Patchwork-Delegate: matthieu.baerts@tessares.net 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 3CF5D19258C for ; Tue, 22 Oct 2024 09:15:14 +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=1729588514; cv=none; b=jZxSRr/p6bZTiA8LXEek+MT8WW8ZCtGHh8Rb4qr68/8knrr1kpypi2aTHW+kUgXNrpEQAtszmo2NkIZ5wFHuGaZeDXR5D8jzjPdkItZLnXnNxNcS1RgQ3YtrnCJKIYY3mjhRI9iC8xsJup5dcm41GQV9SKVUBUbJLHP6KflVkKE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729588514; c=relaxed/simple; bh=jxnliQgObZ6J9UJUzgjw1cLCXUhe5qokADPfyxB0sWU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ANecNP45krvv7mZv1TCaxOecx2MOJXhqZn+/0RdxiT+FFYy1jpljowUqO68G6fKcS8uOP0yynNzCnie8MY3GID2fGgp8CRAaQoxNZ9jallzNjaABU7ffevsuL/WMExuIEKsVeJc15F5g/BHoF0SSC+v4FoAPxlXTt9aGvqM8MA0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OQsfLBR3; 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="OQsfLBR3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B23E2C4CEC3; Tue, 22 Oct 2024 09:15:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729588514; bh=jxnliQgObZ6J9UJUzgjw1cLCXUhe5qokADPfyxB0sWU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OQsfLBR3mL32jpePOYf0AdvtT0sq/FgjBic//k2bcf1VD9L+/jvx6lULRUoa4q5jg SrEJgBkgFKkQuE12XdfzDMlMtyaeCUxFnfmNcNgef+hcsT4l0wpJqRFt6yqTAbVKE4 /51XBYbI9UgzWUDv58iMIMtUoBpIcnq6SfNhXKYqKm+HSBcOh6xNqE82/ERj2HePSr qSN54HggsHtheyN//ftS8iWDLU0tqK0l7HFFcbU6kC0v1VbV3HKSR7ovhWNi9SgeSy tCJ7dET1k0thxIOt5Yz7SLokoaqkg6meGG0r9jnHvz/skzbqTQh5KCngo1SLZ6EX5h zr1EpjTGR6zwg== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 13/36] mptcp: add struct mptcp_id_bitmap Date: Tue, 22 Oct 2024 17:14:21 +0800 Message-ID: <344964d66ab0250ae027ffd46a0e6782d572c33d.1729588019.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Geliang Tang A new struct mptcp_id_bitmap is defined to unify all bitmap type of address IDs for both in-kernel PM and userspace PM. This type can be used to easily refactor dump_addr() interface of the path managers to accept an mptcp_id_bitmap type parameter. It also allows this parameter of dump_addr() can be modified by BPF program when implementing this interface of a BFP path manager. Signed-off-by: Geliang Tang --- net/mptcp/pm.c | 2 +- net/mptcp/pm_netlink.c | 42 ++++++++++++++++++++-------------------- net/mptcp/pm_userspace.c | 14 ++++++-------- net/mptcp/protocol.h | 6 +++++- 4 files changed, 33 insertions(+), 31 deletions(-) diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index f5725c00eb70..b6e6859903ef 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -512,7 +512,7 @@ void mptcp_pm_data_reset(struct mptcp_sock *msk) WRITE_ONCE(pm->addr_signal, 0); WRITE_ONCE(pm->remote_deny_join_id0, false); pm->status = 0; - bitmap_fill(msk->pm.id_avail_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); + bitmap_fill(msk->pm.id_avail_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1); } void mptcp_pm_data_init(struct mptcp_sock *msk) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 02e4dda0dc13..c030a79cd1dd 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -37,7 +37,7 @@ struct pm_nl_pernet { unsigned int local_addr_max; unsigned int subflows_max; unsigned int next_id; - DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); + struct mptcp_id_bitmap id_bitmap; }; #define MPTCP_PM_ADDR_MAX 8 @@ -161,7 +161,7 @@ select_local_address(const struct pm_nl_pernet *pernet, if (!(entry->flags & MPTCP_PM_ADDR_FLAG_SUBFLOW)) continue; - if (!test_bit(entry->addr.id, msk->pm.id_avail_bitmap)) + if (!test_bit(entry->addr.id, msk->pm.id_avail_bitmap.map)) continue; new_local->addr = entry->addr; @@ -189,7 +189,7 @@ select_signal_address(struct pm_nl_pernet *pernet, const struct mptcp_sock *msk, * can lead to additional addresses not being announced. */ list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) { - if (!test_bit(entry->addr.id, msk->pm.id_avail_bitmap)) + if (!test_bit(entry->addr.id, msk->pm.id_avail_bitmap.map)) continue; if (!(entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) @@ -243,7 +243,7 @@ bool mptcp_pm_nl_check_work_pending(struct mptcp_sock *msk) struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk); if (msk->pm.subflows == mptcp_pm_get_subflows_max(msk) || - (find_next_and_bit(pernet->id_bitmap, msk->pm.id_avail_bitmap, + (find_next_and_bit(pernet->id_bitmap.map, msk->pm.id_avail_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1, 0) == MPTCP_PM_MAX_ADDR_ID + 1)) { WRITE_ONCE(msk->pm.work_pending, false); return false; @@ -443,15 +443,15 @@ static unsigned int fill_remote_addresses_vec(struct mptcp_sock *msk, msk->pm.subflows++; addrs[i++] = remote; } else { - DECLARE_BITMAP(unavail_id, MPTCP_PM_MAX_ADDR_ID + 1); + struct mptcp_id_bitmap unavail_id; /* Forbid creation of new subflows matching existing * ones, possibly already created by incoming ADD_ADDR */ - bitmap_zero(unavail_id, MPTCP_PM_MAX_ADDR_ID + 1); + bitmap_zero(unavail_id.map, MPTCP_PM_MAX_ADDR_ID + 1); mptcp_for_each_subflow(msk, subflow) if (READ_ONCE(subflow->local_id) == local->id) - __set_bit(subflow->remote_id, unavail_id); + __set_bit(subflow->remote_id, unavail_id.map); mptcp_for_each_subflow(msk, subflow) { ssk = mptcp_subflow_tcp_sock(subflow); @@ -460,7 +460,7 @@ static unsigned int fill_remote_addresses_vec(struct mptcp_sock *msk, if (deny_id0 && !addrs[i].id) continue; - if (test_bit(addrs[i].id, unavail_id)) + if (test_bit(addrs[i].id, unavail_id.map)) continue; if (!mptcp_pm_addr_families_match(sk, local, &addrs[i])) @@ -470,7 +470,7 @@ static unsigned int fill_remote_addresses_vec(struct mptcp_sock *msk, /* forbid creating multiple address towards * this id */ - __set_bit(addrs[i].id, unavail_id); + __set_bit(addrs[i].id, unavail_id.map); msk->pm.subflows++; i++; } @@ -558,7 +558,7 @@ static void mptcp_pm_create_subflow_or_signal_addr(struct mptcp_sock *msk) rcu_read_lock(); entry = __lookup_addr(pernet, &mpc_addr); if (entry) { - __clear_bit(entry->addr.id, msk->pm.id_avail_bitmap); + __clear_bit(entry->addr.id, msk->pm.id_avail_bitmap.map); msk->mpc_endpoint_id = entry->addr.id; backup = !!(entry->flags & MPTCP_PM_ADDR_FLAG_BACKUP); } @@ -596,7 +596,7 @@ static void mptcp_pm_create_subflow_or_signal_addr(struct mptcp_sock *msk) if (!mptcp_pm_alloc_anno_list(msk, &local.addr)) return; - __clear_bit(local.addr.id, msk->pm.id_avail_bitmap); + __clear_bit(local.addr.id, msk->pm.id_avail_bitmap.map); msk->pm.add_addr_signaled++; /* Special case for ID0: set the correct ID */ @@ -625,7 +625,7 @@ static void mptcp_pm_create_subflow_or_signal_addr(struct mptcp_sock *msk) fullmesh = !!(local.flags & MPTCP_PM_ADDR_FLAG_FULLMESH); - __clear_bit(local.addr.id, msk->pm.id_avail_bitmap); + __clear_bit(local.addr.id, msk->pm.id_avail_bitmap.map); /* Special case for ID0: set the correct ID */ if (local.addr.id == msk->mpc_endpoint_id) @@ -991,7 +991,7 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet, ret = -ERANGE; goto out; } - if (test_bit(entry->addr.id, pernet->id_bitmap)) { + if (test_bit(entry->addr.id, pernet->id_bitmap.map)) { ret = -EBUSY; goto out; } @@ -1025,7 +1025,7 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet, if (!entry->addr.id && needs_id) { find_next: - entry->addr.id = find_next_zero_bit(pernet->id_bitmap, + entry->addr.id = find_next_zero_bit(pernet->id_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1, pernet->next_id); if (!entry->addr.id && pernet->next_id != 1) { @@ -1037,7 +1037,7 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet, if (!entry->addr.id && needs_id) goto out; - __set_bit(entry->addr.id, pernet->id_bitmap); + __set_bit(entry->addr.id, pernet->id_bitmap.map); if (entry->addr.id > pernet->next_id) pernet->next_id = entry->addr.id; @@ -1480,7 +1480,7 @@ static bool mptcp_pm_remove_anno_addr(struct mptcp_sock *msk, if (ret || force) { spin_lock_bh(&msk->pm.lock); if (ret) { - __set_bit(addr->id, msk->pm.id_avail_bitmap); + __set_bit(addr->id, msk->pm.id_avail_bitmap.map); msk->pm.add_addr_signaled--; } mptcp_pm_remove_addr(msk, &list); @@ -1492,7 +1492,7 @@ static bool mptcp_pm_remove_anno_addr(struct mptcp_sock *msk, static void __mark_subflow_endp_available(struct mptcp_sock *msk, u8 id) { /* If it was marked as used, and not ID 0, decrement local_addr_used */ - if (!__test_and_set_bit(id ? : msk->mpc_endpoint_id, msk->pm.id_avail_bitmap) && + if (!__test_and_set_bit(id ? : msk->mpc_endpoint_id, msk->pm.id_avail_bitmap.map) && id && !WARN_ON_ONCE(msk->pm.local_addr_used == 0)) msk->pm.local_addr_used--; } @@ -1623,7 +1623,7 @@ int mptcp_pm_nl_del_addr_doit(struct sk_buff *skb, struct genl_info *info) pernet->addrs--; list_del_rcu(&entry->list); - __clear_bit(entry->addr.id, pernet->id_bitmap); + __clear_bit(entry->addr.id, pernet->id_bitmap.map); spin_unlock_bh(&pernet->lock); mptcp_nl_remove_subflow_and_signal_addr(sock_net(skb->sk), entry); @@ -1687,7 +1687,7 @@ static void mptcp_pm_flush_addrs_and_subflows(struct mptcp_sock *msk, if (slist.nr) mptcp_pm_nl_rm_subflow_received(msk, &slist); /* Reset counters: maybe some subflows have been removed before */ - bitmap_fill(msk->pm.id_avail_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); + bitmap_fill(msk->pm.id_avail_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1); msk->pm.local_addr_used = 0; spin_unlock_bh(&msk->pm.lock); } @@ -1745,7 +1745,7 @@ int mptcp_pm_nl_flush_addrs_doit(struct sk_buff *skb, struct genl_info *info) list_splice_init(&pernet->local_addr_list, &free_list); __reset_counters(pernet); pernet->next_id = 1; - bitmap_zero(pernet->id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); + bitmap_zero(pernet->id_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1); spin_unlock_bh(&pernet->lock); mptcp_nl_flush_addrs_list(sock_net(skb->sk), &free_list); synchronize_rcu(); @@ -1878,7 +1878,7 @@ static int mptcp_pm_nl_dump_addr(struct sk_buff *msg, spin_lock_bh(&pernet->lock); for (i = id; i < MPTCP_PM_MAX_ADDR_ID + 1; i++) { - if (test_bit(i, pernet->id_bitmap)) { + if (test_bit(i, pernet->id_bitmap.map)) { entry = __lookup_addr_by_id(pernet, i); if (!entry) break; diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index c10794154187..cb4f2a174d0d 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -42,15 +42,15 @@ static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, struct mptcp_pm_addr_entry *entry, bool needs_id) { - DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); struct mptcp_pm_addr_entry *match = NULL; struct sock *sk = (struct sock *)msk; + struct mptcp_id_bitmap id_bitmap; struct mptcp_pm_addr_entry *e; bool addr_match = false; bool id_match = false; int ret = -EINVAL; - bitmap_zero(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); + bitmap_zero(id_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1); spin_lock_bh(&msk->pm.lock); mptcp_for_each_address(msk, e) { @@ -64,7 +64,7 @@ static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, } else if (addr_match || id_match) { break; } - __set_bit(e->addr.id, id_bitmap); + __set_bit(e->addr.id, id_bitmap.map); } if (!match && !addr_match && !id_match) { @@ -79,7 +79,7 @@ static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, *e = *entry; if (!e->addr.id && needs_id) - e->addr.id = find_next_zero_bit(id_bitmap, + e->addr.id = find_next_zero_bit(id_bitmap.map, MPTCP_PM_MAX_ADDR_ID + 1, 1); list_add_tail_rcu(&e->list, &msk->pm.userspace_pm_local_addr_list); @@ -586,17 +586,15 @@ int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info) int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, struct netlink_callback *cb) { - struct id_bitmap { - DECLARE_BITMAP(map, MPTCP_PM_MAX_ADDR_ID + 1); - } *bitmap; const struct genl_info *info = genl_info_dump(cb); struct mptcp_pm_addr_entry *entry; + struct mptcp_id_bitmap *bitmap; struct mptcp_sock *msk; int ret = -EINVAL; struct sock *sk; void *hdr; - bitmap = (struct id_bitmap *)cb->ctx; + bitmap = (struct mptcp_id_bitmap *)cb->ctx; msk = mptcp_userspace_pm_get_sock(info); if (!msk) diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 8282a6355765..4358a9a21270 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -211,6 +211,10 @@ enum mptcp_addr_signal_status { /* max value of mptcp_addr_info.id */ #define MPTCP_PM_MAX_ADDR_ID U8_MAX +struct mptcp_id_bitmap { + DECLARE_BITMAP(map, MPTCP_PM_MAX_ADDR_ID + 1); +}; + struct mptcp_pm_data { struct mptcp_addr_info local; struct mptcp_addr_info remote; @@ -231,7 +235,7 @@ struct mptcp_pm_data { u8 pm_type; u8 subflows; u8 status; - DECLARE_BITMAP(id_avail_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); + struct mptcp_id_bitmap id_avail_bitmap; struct mptcp_rm_list rm_list_tx; struct mptcp_rm_list rm_list_rx; };