From patchwork Thu Apr 25 12:02:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643232 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 CE93184E0E; Thu, 25 Apr 2024 12:03:39 +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=1714046620; cv=none; b=FFfm/3SBrWFs7/eU6sxWhsw0GrcJCMm8TYSX912B3OnUQoeo5DRAGRkAqea+yPLKB9JJFHsh037Hdl/bY/Aekguarl0AKX/ZrpJHjMFVLXp7VDKt4aUE23SJUJ/WmW3TEDH/yCEduuDc7PcOH/o0JdUF+GdYbL6zINmyrQgUlac= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714046620; c=relaxed/simple; bh=uj6MhnbWfHKZpKNqZBp0Y+B1Ta8jXbhPpSfQJUVkuU0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=oR0u2JG/bYezzg9wh2gl6wtKGXIG2c71agz/TQB1zqOO/wsrwVjJR/Kom/tlU0h9H4Rc/zv1YJsCnYkbBqhv3XxoXnkfU7Hlo72cKIfFomjsuQGrgwbE2/SdGuT3QgbnRU7a/Dl3pCu/TuT9OOh1AhzzpeS7/nQwc+QlqSGJNGo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rm9s5o68; 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="rm9s5o68" Received: by smtp.kernel.org (Postfix) with ESMTPS id A0948C2BD11; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714046619; bh=uj6MhnbWfHKZpKNqZBp0Y+B1Ta8jXbhPpSfQJUVkuU0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=rm9s5o68jAcwhnVniyaE40TbsjgBwRmh7yuTiuUnVYABU8qsTn+wGIkgbnOVUrRHz a3wgbYT+l4vJu+88bA4StqMF4wl1RkO3VVvjdmB75eda4zSBL+1UwDioymhL/aoC07 KpMGtdDd2RtQ4p5Gn/rqesjKcKfs8jL4chh3ZJku0jz/Yc7GOG3tpGy/Lm6oycvT/U wLCLEGmtwSv+KK1B157nBa2KmO1IVFUnHV9Ov6d5mEoxJS39pIK+RLoj0wbOEAcNpr n5wLy6sL3XKz5463O9Qe6VtdFwc44yE4dmH+vI7ufa0MwQzh3k4fEoTHcirlgW1a7b 1CTLl0Hj41vmA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8401AC19F4F; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:02:59 +0200 Subject: [PATCH v4 1/8] net: Remove the now superfluous sentinel elements from ctl_table array Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-1-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. 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bh=+Ry/P3vnIgGlwYYGg5id8vbk1ld9jjoPMzlYNWVQJoU=; b=owJ4nAHtARL+kA0DAAoBupfNUreWQU8ByyZiAGYqRpW1dVZ1msfemPHv7jlxTgoYulw1pfKUL DY2XIhxsVbkr4kBswQAAQoAHRYhBK5HCVcl5jElzssnkLqXzVK3lkFPBQJmKkaVAAoJELqXzVK3 lkFPHh4L/RW9qNpmsOEAb+b52Y3DMmzSkr1g1fw/dAWvYxzqtMC/v/+HlJeeXgOSHC4VdZk5VkO qL2Dy755SF5uEMDiP+iw92M/DuLIMDpbJ/B/haSonlLwM8kswK9MLxEzRhehjHwuDKb048NQFQb LbXpOCLh8G1mxj6337cx0GdxZ9yd04NseAClNEXiu6AQKMtBMdEXMWGcqVm/vQtBj689hC6MXUt NVMOx85yeWf5XxcU63HNqmIVKzS1emG/zEktER18lPmBumC31nqD5dftNZRuSTX6Kw/FuWobdSZ B79O7X7tpGrfKPUJYNrbnT0IlWye5+rtTVE4sjeh+bTpnB+DsqbGjE7AZWUp9i2DRQkuChk2kkU EEXGYEZSiGpIchZo7XjvU8Ov/rUdfJ33sDCFRrqSTtnRZqdVo0eC9wdkbcWPiMg6Qj8vJZZs6hp IO54zOYjmQIDy+E/jglv4oa4u+jMhRqjOUZQivw8hsA7DBnhtseoSekdx1z9BIeVHt9PX4gOZR7 88= X-Developer-Key: i=j.granados@samsung.com; a=openpgp; fpr=F1F8E46D30F0F6C4A45FF4465895FAAC338C6E77 X-Endpoint-Received: by B4 Relay for j.granados@samsung.com/default with auth_id=70 X-Original-From: Joel Granados Reply-To: j.granados@samsung.com From: Joel Granados This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) * Remove sentinel element from ctl_table structs. * Remove the zeroing out of an array element (to make it look like a sentinel) in neigh_sysctl_register and lowpan_frags_ns_sysctl_register This is not longer needed and is safe after commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added the array size to the ctl_table registration. * Replace the for loop stop condition in sysctl_core_net_init that tests for procname == NULL with one that depends on array size * Removed the "-1" in mpls_net_init that adjusted for having an extra empty element when looping over ctl_table arrays * Use a table_size variable to keep the value of ARRAY_SIZE Signed-off-by: Joel Granados --- net/core/neighbour.c | 5 +---- net/core/sysctl_net_core.c | 12 +++++------- net/dccp/sysctl.c | 2 -- net/ieee802154/6lowpan/reassembly.c | 6 +----- net/mpls/af_mpls.c | 12 ++++++------ net/unix/sysctl_net_unix.c | 1 - 6 files changed, 13 insertions(+), 25 deletions(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 552719c3bbc3..b0327402b3e6 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -3728,7 +3728,7 @@ static int neigh_proc_base_reachable_time(struct ctl_table *ctl, int write, static struct neigh_sysctl_table { struct ctl_table_header *sysctl_header; - struct ctl_table neigh_vars[NEIGH_VAR_MAX + 1]; + struct ctl_table neigh_vars[NEIGH_VAR_MAX]; } neigh_sysctl_template __read_mostly = { .neigh_vars = { NEIGH_SYSCTL_ZERO_INTMAX_ENTRY(MCAST_PROBES, "mcast_solicit"), @@ -3779,7 +3779,6 @@ static struct neigh_sysctl_table { .extra2 = SYSCTL_INT_MAX, .proc_handler = proc_dointvec_minmax, }, - {}, }, }; @@ -3807,8 +3806,6 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p, if (dev) { dev_name_source = dev->name; /* Terminate the table early */ - memset(&t->neigh_vars[NEIGH_VAR_GC_INTERVAL], 0, - sizeof(t->neigh_vars[NEIGH_VAR_GC_INTERVAL])); neigh_vars_size = NEIGH_VAR_BASE_REACHABLE_TIME_MS + 1; } else { struct neigh_table *tbl = p->tbl; diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c index 6973dda3abda..a84690b13bb9 100644 --- a/net/core/sysctl_net_core.c +++ b/net/core/sysctl_net_core.c @@ -660,7 +660,6 @@ static struct ctl_table net_core_table[] = { .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, }, - { } }; static struct ctl_table netns_core_table[] = { @@ -697,7 +696,6 @@ static struct ctl_table netns_core_table[] = { .extra2 = SYSCTL_ONE, .proc_handler = proc_dou8vec_minmax, }, - { } }; static int __init fb_tunnels_only_for_init_net_sysctl_setup(char *str) @@ -715,7 +713,8 @@ __setup("fb_tunnels=", fb_tunnels_only_for_init_net_sysctl_setup); static __net_init int sysctl_core_net_init(struct net *net) { - struct ctl_table *tbl, *tmp; + size_t table_size = ARRAY_SIZE(netns_core_table); + struct ctl_table *tbl; tbl = netns_core_table; if (!net_eq(net, &init_net)) { @@ -723,12 +722,11 @@ static __net_init int sysctl_core_net_init(struct net *net) if (tbl == NULL) goto err_dup; - for (tmp = tbl; tmp->procname; tmp++) - tmp->data += (char *)net - (char *)&init_net; + for (int i = 0; i < table_size; ++i) + (tbl + i)->data += (char *)net - (char *)&init_net; } - net->core.sysctl_hdr = register_net_sysctl_sz(net, "net/core", tbl, - ARRAY_SIZE(netns_core_table)); + net->core.sysctl_hdr = register_net_sysctl_sz(net, "net/core", tbl, table_size); if (net->core.sysctl_hdr == NULL) goto err_reg; diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c index ee8d4f5afa72..3fc474d6e57d 100644 --- a/net/dccp/sysctl.c +++ b/net/dccp/sysctl.c @@ -90,8 +90,6 @@ static struct ctl_table dccp_default_table[] = { .mode = 0644, .proc_handler = proc_dointvec_ms_jiffies, }, - - { } }; static struct ctl_table_header *dccp_table_header; diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c index 6dd960ec558c..09b18ee6df00 100644 --- a/net/ieee802154/6lowpan/reassembly.c +++ b/net/ieee802154/6lowpan/reassembly.c @@ -338,7 +338,6 @@ static struct ctl_table lowpan_frags_ns_ctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; /* secret interval has been deprecated */ @@ -351,7 +350,6 @@ static struct ctl_table lowpan_frags_ctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; static int __net_init lowpan_frags_ns_sysctl_register(struct net *net) @@ -370,10 +368,8 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net) goto err_alloc; /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - table[0].procname = NULL; + if (net->user_ns != &init_user_ns) table_size = 0; - } } table[0].data = &ieee802154_lowpan->fqdir->high_thresh; diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c index 6dab883a08dd..1d15081090be 100644 --- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -1393,13 +1393,13 @@ static const struct ctl_table mpls_dev_table[] = { .proc_handler = mpls_conf_proc, .data = MPLS_PERDEV_SYSCTL_OFFSET(input_enabled), }, - { } }; static int mpls_dev_sysctl_register(struct net_device *dev, struct mpls_dev *mdev) { char path[sizeof("net/mpls/conf/") + IFNAMSIZ]; + size_t table_size = ARRAY_SIZE(mpls_dev_table); struct net *net = dev_net(dev); struct ctl_table *table; int i; @@ -1411,7 +1411,7 @@ static int mpls_dev_sysctl_register(struct net_device *dev, /* Table data contains only offsets relative to the base of * the mdev at this point, so make them absolute. */ - for (i = 0; i < ARRAY_SIZE(mpls_dev_table); i++) { + for (i = 0; i < table_size; i++) { table[i].data = (char *)mdev + (uintptr_t)table[i].data; table[i].extra1 = mdev; table[i].extra2 = net; @@ -1419,8 +1419,7 @@ static int mpls_dev_sysctl_register(struct net_device *dev, snprintf(path, sizeof(path), "net/mpls/conf/%s", dev->name); - mdev->sysctl = register_net_sysctl_sz(net, path, table, - ARRAY_SIZE(mpls_dev_table)); + mdev->sysctl = register_net_sysctl_sz(net, path, table, table_size); if (!mdev->sysctl) goto free; @@ -2674,6 +2673,7 @@ static const struct ctl_table mpls_table[] = { static int mpls_net_init(struct net *net) { + size_t table_size = ARRAY_SIZE(mpls_table); struct ctl_table *table; int i; @@ -2689,11 +2689,11 @@ static int mpls_net_init(struct net *net) /* Table data contains only offsets relative to the base of * the mdev at this point, so make them absolute. */ - for (i = 0; i < ARRAY_SIZE(mpls_table) - 1; i++) + for (i = 0; i < tabel_size; i++) table[i].data = (char *)net + (uintptr_t)table[i].data; net->mpls.ctl = register_net_sysctl_sz(net, "net/mpls", table, - ARRAY_SIZE(mpls_table)); + tabel_size); if (net->mpls.ctl == NULL) { kfree(table); return -ENOMEM; diff --git a/net/unix/sysctl_net_unix.c b/net/unix/sysctl_net_unix.c index 3e84b31c355a..ae45d4cfac39 100644 --- a/net/unix/sysctl_net_unix.c +++ b/net/unix/sysctl_net_unix.c @@ -19,7 +19,6 @@ static struct ctl_table unix_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, - { } }; int __net_init unix_sysctl_register(struct net *net) From patchwork Thu Apr 25 12:03:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643233 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 E373B12AAE8; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; 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Thu, 25 Apr 2024 12:03:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714046619; bh=i9h9lVLyNDoxDbhZO/CotTk6I6QCc/e0ElCPZRrEKjA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=L0uZlijwt55TeZl8wQ5iwj9JrKMGFgCrbt54SViix00Lc3xVib3ciC+XMRK9jRPiI lzrPfsxD1TKsv6J8yV3tfcFu9NpH8gz4h1DFr1CdkTF5JlAyTUjWI3j/cUwwyKKb3l dHlmEALCpxrRQv5GV4RQgqL9m6oxHwHTMDvWEp5kJyDtkm6jKKU0UDedIQXefCHtp6 RgSrdO+VgE4VZcUw3rlT2+AiEQjd4UC0ccdNkWc7Lyiw1sI3GGB3EzLUIN8yNdZPH+ 3esRtuPB8SlNZKyzS7XTLIx9cWU1YvrvcnCnZsoRfl0myUfGOgoQjwcGLiu0GMwiDG PptImyuwRGY/A== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2CD8C19F53; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:03:00 +0200 Subject: [PATCH v4 2/8] net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-2-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. 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This is not longer needed and is safe after commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added the array size to the ctl_table registration. * Remove extra sentinel element in the declaration of devinet_vars. * Removed the "-1" in __devinet_sysctl_register, sysctl_route_net_init, ipv6_sysctl_net_init and ipv4_sysctl_init_net that adjusted for having an extra empty element when looping over ctl_table arrays * Replace the for loop stop condition in __addrconf_sysctl_register that tests for procname == NULL with one that depends on array size * Removing the unprivileged user check in ipv6_route_sysctl_init is safe as it is replaced by calling ipv6_route_sysctl_table_size; introduced in commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") * Use a table_size variable to keep the value of ARRAY_SIZE Signed-off-by: Joel Granados --- net/ipv4/devinet.c | 5 ++--- net/ipv4/ip_fragment.c | 2 -- net/ipv4/route.c | 8 ++------ net/ipv4/sysctl_net_ipv4.c | 7 +++---- net/ipv4/xfrm4_policy.c | 1 - net/ipv6/addrconf.c | 8 +++----- net/ipv6/icmp.c | 1 - net/ipv6/reassembly.c | 2 -- net/ipv6/route.c | 5 ----- net/ipv6/sysctl_net_ipv6.c | 8 +++----- net/ipv6/xfrm6_policy.c | 1 - 11 files changed, 13 insertions(+), 35 deletions(-) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 7a437f0d4190..6195cc5be1fc 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -2515,7 +2515,7 @@ static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, static struct devinet_sysctl_table { struct ctl_table_header *sysctl_header; - struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX]; + struct ctl_table devinet_vars[IPV4_DEVCONF_MAX]; } devinet_sysctl = { .devinet_vars = { DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding", @@ -2578,7 +2578,7 @@ static int __devinet_sysctl_register(struct net *net, char *dev_name, if (!t) goto out; - for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) { + for (i = 0; i < ARRAY_SIZE(t->devinet_vars); i++) { t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf; t->devinet_vars[i].extra1 = p; t->devinet_vars[i].extra2 = net; @@ -2652,7 +2652,6 @@ static struct ctl_table ctl_forward_entry[] = { .extra1 = &ipv4_devconf, .extra2 = &init_net, }, - { }, }; #endif diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index a4941f53b523..e308779ed77b 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -580,7 +580,6 @@ static struct ctl_table ip4_frags_ns_ctl_table[] = { .proc_handler = proc_dointvec_minmax, .extra1 = &dist_min, }, - { } }; /* secret interval has been deprecated */ @@ -593,7 +592,6 @@ static struct ctl_table ip4_frags_ctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; static int __net_init ip4_frags_ns_ctl_register(struct net *net) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index c8f76f56dc16..deecfc0e5a91 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -3509,7 +3509,6 @@ static struct ctl_table ipv4_route_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; static const char ipv4_route_flush_procname[] = "flush"; @@ -3543,7 +3542,6 @@ static struct ctl_table ipv4_route_netns_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { }, }; static __net_init int sysctl_route_net_init(struct net *net) @@ -3561,16 +3559,14 @@ static __net_init int sysctl_route_net_init(struct net *net) /* Don't export non-whitelisted sysctls to unprivileged users */ if (net->user_ns != &init_user_ns) { - if (tbl[0].procname != ipv4_route_flush_procname) { - tbl[0].procname = NULL; + if (tbl[0].procname != ipv4_route_flush_procname) table_size = 0; - } } /* Update the variables to point into the current struct net * except for the first element flush */ - for (i = 1; i < ARRAY_SIZE(ipv4_route_netns_table) - 1; i++) + for (i = 1; i < table_size; i++) tbl[i].data += (void *)net - (void *)&init_net; } tbl[0].extra1 = net; diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 7e4f16a7dcc1..8b12bf195004 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -575,7 +575,6 @@ static struct ctl_table ipv4_table[] = { .extra1 = &sysctl_fib_sync_mem_min, .extra2 = &sysctl_fib_sync_mem_max, }, - { } }; static struct ctl_table ipv4_net_table[] = { @@ -1502,11 +1501,11 @@ static struct ctl_table ipv4_net_table[] = { .proc_handler = proc_dou8vec_minmax, .extra1 = SYSCTL_ONE, }, - { } }; static __net_init int ipv4_sysctl_init_net(struct net *net) { + size_t table_size = ARRAY_SIZE(ipv4_net_table); struct ctl_table *table; table = ipv4_net_table; @@ -1517,7 +1516,7 @@ static __net_init int ipv4_sysctl_init_net(struct net *net) if (!table) goto err_alloc; - for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) { + for (i = 0; i < table_size; i++) { if (table[i].data) { /* Update the variables to point into * the current struct net @@ -1533,7 +1532,7 @@ static __net_init int ipv4_sysctl_init_net(struct net *net) } net->ipv4.ipv4_hdr = register_net_sysctl_sz(net, "net/ipv4", table, - ARRAY_SIZE(ipv4_net_table)); + table_size); if (!net->ipv4.ipv4_hdr) goto err_reg; diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index c33bca2c3841..4c74fec034c5 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -152,7 +152,6 @@ static struct ctl_table xfrm4_policy_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; static __net_init int xfrm4_net_sysctl_init(struct net *net) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 247bd4d8ee45..6e7e8c4f1ab6 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -7181,14 +7181,12 @@ static const struct ctl_table addrconf_sysctl[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_TWO, }, - { - /* sentinel */ - } }; static int __addrconf_sysctl_register(struct net *net, char *dev_name, struct inet6_dev *idev, struct ipv6_devconf *p) { + size_t table_size = ARRAY_SIZE(addrconf_sysctl); int i, ifindex; struct ctl_table *table; char path[sizeof("net/ipv6/conf/") + IFNAMSIZ]; @@ -7197,7 +7195,7 @@ static int __addrconf_sysctl_register(struct net *net, char *dev_name, if (!table) goto out; - for (i = 0; table[i].data; i++) { + for (i = 0; i < table_size; i++) { table[i].data += (char *)p - (char *)&ipv6_devconf; /* If one of these is already set, then it is not safe to * overwrite either of them: this makes proc_dointvec_minmax @@ -7212,7 +7210,7 @@ static int __addrconf_sysctl_register(struct net *net, char *dev_name, snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name); p->sysctl_header = register_net_sysctl_sz(net, path, table, - ARRAY_SIZE(addrconf_sysctl)); + table_size); if (!p->sysctl_header) goto free; diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 1635da07285f..91cbf8e8009f 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -1206,7 +1206,6 @@ static struct ctl_table ipv6_icmp_table_template[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, - { }, }; struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net) diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index acb4f119e11f..afb343cb77ac 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -436,7 +436,6 @@ static struct ctl_table ip6_frags_ns_ctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; /* secret interval has been deprecated */ @@ -449,7 +448,6 @@ static struct ctl_table ip6_frags_ctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; static int __net_init ip6_frags_ns_sysctl_register(struct net *net) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 1f4b935a0e57..b49137c3031b 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -6428,7 +6428,6 @@ static struct ctl_table ipv6_route_table_template[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, - { } }; struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) @@ -6452,10 +6451,6 @@ struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; table[10].data = &net->ipv6.sysctl.skip_notify_on_dev_down; - - /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) - table[1].procname = NULL; } return table; diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c index 888676163e90..b8cbad351802 100644 --- a/net/ipv6/sysctl_net_ipv6.c +++ b/net/ipv6/sysctl_net_ipv6.c @@ -213,7 +213,6 @@ static struct ctl_table ipv6_table_template[] = { .proc_handler = proc_doulongvec_minmax, .extra2 = &ioam6_id_wide_max, }, - { } }; static struct ctl_table ipv6_rotable[] = { @@ -248,11 +247,11 @@ static struct ctl_table ipv6_rotable[] = { .proc_handler = proc_dointvec, }, #endif /* CONFIG_NETLABEL */ - { } }; static int __net_init ipv6_sysctl_net_init(struct net *net) { + size_t table_size = ARRAY_SIZE(ipv6_table_template); struct ctl_table *ipv6_table; struct ctl_table *ipv6_route_table; struct ctl_table *ipv6_icmp_table; @@ -264,7 +263,7 @@ static int __net_init ipv6_sysctl_net_init(struct net *net) if (!ipv6_table) goto out; /* Update the variables to point into the current struct net */ - for (i = 0; i < ARRAY_SIZE(ipv6_table_template) - 1; i++) + for (i = 0; i < table_size; i++) ipv6_table[i].data += (void *)net - (void *)&init_net; ipv6_route_table = ipv6_route_sysctl_init(net); @@ -276,8 +275,7 @@ static int __net_init ipv6_sysctl_net_init(struct net *net) goto out_ipv6_route_table; net->ipv6.sysctl.hdr = register_net_sysctl_sz(net, "net/ipv6", - ipv6_table, - ARRAY_SIZE(ipv6_table_template)); + ipv6_table, table_size); if (!net->ipv6.sysctl.hdr) goto out_ipv6_icmp_table; diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 42fb6996b077..499b5f5c19fc 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -184,7 +184,6 @@ static struct ctl_table xfrm6_policy_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; static int __net_init xfrm6_net_sysctl_init(struct net *net) From patchwork Thu Apr 25 12:03:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643235 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 286FF12BE8C; 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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. 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Signed-off-by: Joel Granados --- net/rds/ib_sysctl.c | 1 - net/rds/sysctl.c | 1 - net/rds/tcp.c | 1 - 3 files changed, 3 deletions(-) diff --git a/net/rds/ib_sysctl.c b/net/rds/ib_sysctl.c index e4e41b3afce7..2af678e71e3c 100644 --- a/net/rds/ib_sysctl.c +++ b/net/rds/ib_sysctl.c @@ -103,7 +103,6 @@ static struct ctl_table rds_ib_sysctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; void rds_ib_sysctl_exit(void) diff --git a/net/rds/sysctl.c b/net/rds/sysctl.c index e381bbcd9cc1..025f518a4349 100644 --- a/net/rds/sysctl.c +++ b/net/rds/sysctl.c @@ -89,7 +89,6 @@ static struct ctl_table rds_sysctl_rds_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; void rds_sysctl_exit(void) diff --git a/net/rds/tcp.c b/net/rds/tcp.c index 2dba7505b414..d8111ac83bb6 100644 --- a/net/rds/tcp.c +++ b/net/rds/tcp.c @@ -86,7 +86,6 @@ static struct ctl_table rds_tcp_sysctl_table[] = { .proc_handler = rds_tcp_skbuf_handler, .extra1 = &rds_tcp_min_rcvbuf, }, - { } }; u32 rds_tcp_write_seq(struct rds_tcp_connection *tc) From patchwork Thu Apr 25 12:03:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643236 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 724DB12C477; Thu, 25 Apr 2024 12:03:40 +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=1714046620; cv=none; b=jyUtlCihSEVmRff3BkKvACGaQ4XO/boGP7NgtoA18vobCEw1Q0W8IOwR9pKQe7IUYmWf/EVpSWrxlVQf7skqKmu4lVGEzGSI0BxHG09ctVeBqv7vIPTnNgJVKEwWDV1CEfiFBxx2J5b0pP7Sun2oJBYyuF7jtR15EBKCnkgnlpQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714046620; c=relaxed/simple; bh=wI15hI2kAJDu/Q8ruVpgWztbx7Cn9f+WAAD5UfCnh8M=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=F1tsG+ev6sMRw4QoU/FvOxc2g6mloksZlWk5fMjayYrJm/pUg1Ix8lezUPWAwkMASZ4rbUWpIhfTwkz20WvXQ73Gs0IwJBJl6ak0OReDuNFiECszK+L3MCyCYgX4Ia3fEG/sj1E2/leKSGJHmRN2HyK8833Z/s25/s/YX6GiNk8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ovPYDCpu; 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="ovPYDCpu" Received: by smtp.kernel.org (Postfix) with ESMTPS id E04B9C4AF11; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714046619; bh=wI15hI2kAJDu/Q8ruVpgWztbx7Cn9f+WAAD5UfCnh8M=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=ovPYDCpug86AlKoYJj+lQUZskX0b4K1m7U0vLPCM47gOSJHaGEb+40hGHry2kebAT iqcSPlDoyBPmAnurqi2dMR/nBNr/BFqhqP3OmF5XAj7zYRe9td0zdSSEbTpI9wMuGY CgRgeX77JrMYUkoJZfeKyURMWshscy4EDj2M+9/nMYrkP/wZ25RhgjxX+etd+S6VDJ VBxj3C+vXWCcia8BaPNCwz6jkR3pkmnlKUZ5T/U9ACaF6qBYMLdcQNVmnmorSEKUE3 uEekD9iqzHmM+oSnKafCfKaEFF3PfEeBaM2zpA1PNtMKIiOh327IIgn6ZFA3+sfXan Q97mxLrHaJnIw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE565C10F15; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:03:02 +0200 Subject: [PATCH v4 4/8] net: sunrpc: Remove the now superfluous sentinel elements from ctl_table array Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-4-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. 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Signed-off-by: Joel Granados --- net/sunrpc/sysctl.c | 1 - net/sunrpc/xprtrdma/svc_rdma.c | 1 - net/sunrpc/xprtrdma/transport.c | 1 - net/sunrpc/xprtsock.c | 1 - 4 files changed, 4 deletions(-) diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c index 93941ab12549..5f3170a1c9bb 100644 --- a/net/sunrpc/sysctl.c +++ b/net/sunrpc/sysctl.c @@ -160,7 +160,6 @@ static struct ctl_table debug_table[] = { .mode = 0444, .proc_handler = proc_do_xprt, }, - { } }; void diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c index f86970733eb0..474f7a98fe9e 100644 --- a/net/sunrpc/xprtrdma/svc_rdma.c +++ b/net/sunrpc/xprtrdma/svc_rdma.c @@ -209,7 +209,6 @@ static struct ctl_table svcrdma_parm_table[] = { .extra1 = &zero, .extra2 = &zero, }, - { }, }; static void svc_rdma_proc_cleanup(void) diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 29b0562d62e7..9a8ce5df83ca 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -137,7 +137,6 @@ static struct ctl_table xr_tunables_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { }, }; #endif diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index bb9b747d58a1..f62f7b65455b 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -160,7 +160,6 @@ static struct ctl_table xs_tunables_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { }, }; /* From patchwork Thu Apr 25 12:03:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643238 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 85C6F12C488; Thu, 25 Apr 2024 12:03:40 +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=1714046620; cv=none; b=kiSwKMZ99PDMjTmgqqjyFYdi3AK6fucGcCqlRbl7Nygl1WnY3zsP4tkN7EugGrFKe8XiBOD0Fpu9+tbA8BtWHDpJJBlmGJffsuSoJfsBkD4VR3vis5BfSyv4T8IGeCykGaQZWvhnwbYJ1x17I8lk2RCT/Th8ToSF20yP9jgBux0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714046620; c=relaxed/simple; bh=MLLgeQP7IMlxSSyHDKz7Xc2vb7hwc9bWb8kATLJW89U=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=FIuRLeiKkoNqahvAwyj23O70eZim2JJbWUgadrlnNDZiYYUOhGyGGBM5WFK7z+NX8tZOxB0qNPP0JxUfk/GAKAHK1bgdGMcfqPawfhOyOoZMVcJAYd0xx2DJT6cOBxmTDnliNlGGc2wUaLVqxAfpqhKAeO7s+Y/FsonQjNbdXr0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EBAzO72Q; 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="EBAzO72Q" Received: by smtp.kernel.org (Postfix) with ESMTPS id 00EF7C4AF52; Thu, 25 Apr 2024 12:03:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714046620; bh=MLLgeQP7IMlxSSyHDKz7Xc2vb7hwc9bWb8kATLJW89U=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=EBAzO72QqwNcZdyGKB1wE38LFdw7MTZNWQlFc2UEAhy/nUSfnpLFeGpWtsPeCE/0S x71eImGQak+WqyC09gZdSnJWdlFJYm1T4IpYvbtcOHdmcovOFHuP8ND40r3Juace/v 2qQe0Ah8QSZzSBDSPem/dwFGp6OtXLX5xTmQMPZxhOKjtTxlG9sSUUQ3mj7jTmH88n eVx64JF6QiLAicl0Q4SjlSZFk+xFTFz9gpRmokPcNBqTJ8zxXa2o6kBa73v43e6PCP Q6nneY8NsWe509a9mL956trAcBTFIdOfoxQzBe0eJZQdE0jBHoQbAHTvM9RfHnpRVy 0SPsWzYtVZ+Kw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8782C19F4F; Thu, 25 Apr 2024 12:03:39 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:03:03 +0200 Subject: [PATCH v4 5/8] net: Remove ctl_table sentinel elements from several networking subsystems Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-5-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. Wythe" , Tony Lu , Wen Gu , Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Jon Maloy , Ying Xue , Martin Schiller , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , Roopa Prabhu , Nikolay Aleksandrov , Simon Horman , Julian Anastasov , Joerg Reuter , Luis Chamberlain , Kees Cook Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dccp@vger.kernel.org, linux-wpan@vger.kernel.org, mptcp@lists.linux.dev, linux-hams@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-afs@lists.infradead.org, linux-sctp@vger.kernel.org, linux-s390@vger.kernel.org, linux-nfs@vger.kernel.org, tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, bridge@lists.linux.dev, lvs-devel@vger.kernel.org, Joel Granados X-Mailer: b4 0.13-dev-2d940 X-Developer-Signature: v=1; a=openpgp-sha256; l=7509; i=j.granados@samsung.com; h=from:subject:message-id; bh=ECJVmDZTABLmCLI3IvBjvSf32Movt48DJVWRJRYYOH8=; b=owJ4nAHtARL+kA0DAAoBupfNUreWQU8ByyZiAGYqRpfWsURjRi/6gTs5qfncwRROGUCpsBdEJ ZU24y0JOgy/uYkBswQAAQoAHRYhBK5HCVcl5jElzssnkLqXzVK3lkFPBQJmKkaXAAoJELqXzVK3 lkFPz1oL/iWbCeAmgciRXvMP50TVbCzQGMrBMN7BNlGcu/cunW/FJCLY4Lp+NGDBD3KjNznOdoN nh2ygkmGfpAVxQ8yd4oDH+gexrkn+RXJ41Lg01lfSI1cvsAkyN1pgbYhH+TWztEhy6figVpp/nt BpngMNDQU/VnFBQgacApZGw3qYj14jRuitEQiz1F5y1rvqLEfNwIqzWra76HHJ4XhLWNEu8sQbG Md0Sx+32E6gRI5Jq6AOqR85XUcnxmDFahW0c0xKjpcMNW7rvh8cLuw10r7Zr3p+rxVZSGgsMKi+ NW1mJN562gydVglaYsnot8XISVOlFsNz/iyWReC27N4HY92bXT4GCOdvXoLcmwS9FkCPv+O234y /5acYH3mmuYCB6Dm26y6pe1PSa+q9RT4y952Pu2o2mPS/2C/8CXKi4zkEE/BkRA/cV/KN5PAfBg x1KzAiYqshxJbIUzyuQQ0Cl80XZGHDcCa+mbP2H3ZsK3UobGjYzdXI8j7Xs+EKSWcat873j4Ql5 kM= X-Developer-Key: i=j.granados@samsung.com; a=openpgp; fpr=F1F8E46D30F0F6C4A45FF4465895FAAC338C6E77 X-Endpoint-Received: by B4 Relay for j.granados@samsung.com/default with auth_id=70 X-Original-From: Joel Granados Reply-To: j.granados@samsung.com From: Joel Granados This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) To avoid lots of small commits, this commit brings together network changes from (as they appear in MAINTAINERS) LLC, MPTCP, NETROM NETWORK LAYER, PHONET PROTOCOL, ROSE NETWORK LAYER, RXRPC SOCKETS, SCTP PROTOCOL, SHARED MEMORY COMMUNICATIONS (SMC), TIPC NETWORK LAYER and NETWORKING [IPSEC] * Remove sentinel element from ctl_table structs. * Replace empty array registration with the register_net_sysctl_sz call in llc_sysctl_init * Replace the for loop stop condition that tests for procname == NULL with one that depends on array size in sctp_sysctl_net_register * Remove instances where an array element is zeroed out to make it look like a sentinel in xfrm_sysctl_init. This is not longer needed and is safe after commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added the array size to the ctl_table registration * Use a table_size variable to keep the value of ARRAY_SIZE Signed-off-by: Joel Granados --- net/llc/sysctl_net_llc.c | 8 ++------ net/mptcp/ctrl.c | 1 - net/netrom/sysctl_net_netrom.c | 1 - net/phonet/sysctl.c | 1 - net/rose/sysctl_net_rose.c | 1 - net/rxrpc/sysctl.c | 1 - net/sctp/sysctl.c | 10 +++------- net/smc/smc_sysctl.c | 1 - net/tipc/sysctl.c | 1 - net/xfrm/xfrm_sysctl.c | 5 +---- 10 files changed, 6 insertions(+), 24 deletions(-) diff --git a/net/llc/sysctl_net_llc.c b/net/llc/sysctl_net_llc.c index 8443a6d841b0..72e101135f8c 100644 --- a/net/llc/sysctl_net_llc.c +++ b/net/llc/sysctl_net_llc.c @@ -44,11 +44,6 @@ static struct ctl_table llc2_timeout_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { }, -}; - -static struct ctl_table llc_station_table[] = { - { }, }; static struct ctl_table_header *llc2_timeout_header; @@ -56,8 +51,9 @@ static struct ctl_table_header *llc_station_header; int __init llc_sysctl_init(void) { + struct ctl_table empty[1] = {}; llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table); - llc_station_header = register_net_sysctl(&init_net, "net/llc/station", llc_station_table); + llc_station_header = register_net_sysctl_sz(&init_net, "net/llc/station", empty, 0); if (!llc2_timeout_header || !llc_station_header) { llc_sysctl_exit(); diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c index 13fe0748dde8..8bf7c26a0878 100644 --- a/net/mptcp/ctrl.c +++ b/net/mptcp/ctrl.c @@ -156,7 +156,6 @@ static struct ctl_table mptcp_sysctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - {} }; static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet) diff --git a/net/netrom/sysctl_net_netrom.c b/net/netrom/sysctl_net_netrom.c index 79fb2d3f477b..7dc0fa628f2e 100644 --- a/net/netrom/sysctl_net_netrom.c +++ b/net/netrom/sysctl_net_netrom.c @@ -140,7 +140,6 @@ static struct ctl_table nr_table[] = { .extra1 = &min_reset, .extra2 = &max_reset }, - { } }; int __init nr_register_sysctl(void) diff --git a/net/phonet/sysctl.c b/net/phonet/sysctl.c index 0d0bf41381c2..82fc22467a09 100644 --- a/net/phonet/sysctl.c +++ b/net/phonet/sysctl.c @@ -81,7 +81,6 @@ static struct ctl_table phonet_table[] = { .mode = 0644, .proc_handler = proc_local_port_range, }, - { } }; int __init phonet_sysctl_init(void) diff --git a/net/rose/sysctl_net_rose.c b/net/rose/sysctl_net_rose.c index d391d7758f52..d801315b7083 100644 --- a/net/rose/sysctl_net_rose.c +++ b/net/rose/sysctl_net_rose.c @@ -112,7 +112,6 @@ static struct ctl_table rose_table[] = { .extra1 = &min_window, .extra2 = &max_window }, - { } }; void __init rose_register_sysctl(void) diff --git a/net/rxrpc/sysctl.c b/net/rxrpc/sysctl.c index c9bedd0e2d86..9bf9a1f6e4cb 100644 --- a/net/rxrpc/sysctl.c +++ b/net/rxrpc/sysctl.c @@ -127,7 +127,6 @@ static struct ctl_table rxrpc_sysctl_table[] = { .extra1 = (void *)SYSCTL_ONE, .extra2 = (void *)&four, }, - { } }; int __init rxrpc_sysctl_init(void) diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c index f65d6f92afcb..c00087e01351 100644 --- a/net/sctp/sysctl.c +++ b/net/sctp/sysctl.c @@ -80,8 +80,6 @@ static struct ctl_table sctp_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - - { /* sentinel */ } }; /* The following index defines are used in sctp_sysctl_net_register(). @@ -384,8 +382,6 @@ static struct ctl_table sctp_net_table[] = { .extra1 = SYSCTL_ZERO, .extra2 = &pf_expose_max, }, - - { /* sentinel */ } }; static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write, @@ -597,6 +593,7 @@ static int proc_sctp_do_probe_interval(struct ctl_table *ctl, int write, int sctp_sysctl_net_register(struct net *net) { + size_t table_size = ARRAY_SIZE(sctp_net_table); struct ctl_table *table; int i; @@ -604,7 +601,7 @@ int sctp_sysctl_net_register(struct net *net) if (!table) return -ENOMEM; - for (i = 0; table[i].data; i++) + for (i = 0; i < table_size; i++) table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp; table[SCTP_RTO_MIN_IDX].extra2 = &net->sctp.rto_max; @@ -613,8 +610,7 @@ int sctp_sysctl_net_register(struct net *net) table[SCTP_PS_RETRANS_IDX].extra1 = &net->sctp.pf_retrans; net->sctp.sysctl_header = register_net_sysctl_sz(net, "net/sctp", - table, - ARRAY_SIZE(sctp_net_table)); + table, table_size); if (net->sctp.sysctl_header == NULL) { kfree(table); return -ENOMEM; diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c index a5946d1b9d60..bd0b7e2f8824 100644 --- a/net/smc/smc_sysctl.c +++ b/net/smc/smc_sysctl.c @@ -90,7 +90,6 @@ static struct ctl_table smc_table[] = { .extra1 = &conns_per_lgr_min, .extra2 = &conns_per_lgr_max, }, - { } }; int __net_init smc_sysctl_net_init(struct net *net) diff --git a/net/tipc/sysctl.c b/net/tipc/sysctl.c index 9fb65c988f7f..30d2e06e3d8c 100644 --- a/net/tipc/sysctl.c +++ b/net/tipc/sysctl.c @@ -91,7 +91,6 @@ static struct ctl_table tipc_table[] = { .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, - {} }; int tipc_register_sysctl(void) diff --git a/net/xfrm/xfrm_sysctl.c b/net/xfrm/xfrm_sysctl.c index 7fdeafc838a7..b0f542805e6e 100644 --- a/net/xfrm/xfrm_sysctl.c +++ b/net/xfrm/xfrm_sysctl.c @@ -38,7 +38,6 @@ static struct ctl_table xfrm_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, - {} }; int __net_init xfrm_sysctl_init(struct net *net) @@ -57,10 +56,8 @@ int __net_init xfrm_sysctl_init(struct net *net) table[3].data = &net->xfrm.sysctl_acq_expires; /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - table[0].procname = NULL; + if (net->user_ns != &init_user_ns) table_size = 0; - } net->xfrm.sysctl_hdr = register_net_sysctl_sz(net, "net/core", table, table_size); From patchwork Thu Apr 25 12:03:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643239 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 8847212C491; Thu, 25 Apr 2024 12:03:40 +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=1714046620; cv=none; b=IXpXZ7alzitGkvZmMLc933pfjov5yYfHNuBSnHt6KsYSShN8D8bwwqk91rHP1GU18GAZLqIkYsXEdlNnwgfC7xvCmv3Xm0QlhlwhIiQ0oeEYtn9AiKlLggjrhoeIniIVe2Ytx//MGpdWGpUAHYPjEcEMRUg5OOnrwEHCA+Swd9k= ARC-Message-Signature: i=1; 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b=ZYkxqNIAc3llJ3R6AcLpxG9noAnbzw6aU0QtrIdt45NbN2/SzwcYgEa8DRWDnNqou dI7XbIMDO02SuUZ0ntC1trr/Q/WU1/noW+4IfZUSxX22V2Opuz6zUKte4TU2AZGqVX AqpgLfzbeOQhg4byPkYKcmr5kDMuot9Sn1qybbmpSM67DBEdF5IWFgrlcg+k5bPwQJ 4aIJX0vz17PBWS8nkKjvG9gIYvoxXj2VwhbJy/ObI8wgRSWjAGTzlWDN5TnyXGtdg5 z+9QhZTUiXzR530MJFJ0h+v7GC020Wo76MFK52Q9GFPbCOvsSb2Z0jPAh7vHPvclwU NNzVNovondDUA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DD95C10F15; Thu, 25 Apr 2024 12:03:40 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:03:04 +0200 Subject: [PATCH v4 6/8] netfilter: Remove the now superfluous sentinel elements from ctl_table array Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-6-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. Wythe" , Tony Lu , Wen Gu , Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Jon Maloy , Ying Xue , Martin Schiller , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , Roopa Prabhu , Nikolay Aleksandrov , Simon Horman , Julian Anastasov , Joerg Reuter , Luis Chamberlain , Kees Cook Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dccp@vger.kernel.org, linux-wpan@vger.kernel.org, mptcp@lists.linux.dev, linux-hams@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-afs@lists.infradead.org, linux-sctp@vger.kernel.org, linux-s390@vger.kernel.org, linux-nfs@vger.kernel.org, tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, bridge@lists.linux.dev, lvs-devel@vger.kernel.org, Joel Granados X-Mailer: b4 0.13-dev-2d940 X-Developer-Signature: v=1; a=openpgp-sha256; l=6266; i=j.granados@samsung.com; h=from:subject:message-id; bh=8f/Dg8d3/rC6e0dRD7zz4wfwGN+n8oo3AOmfFngwe40=; b=owJ4nAHtARL+kA0DAAoBupfNUreWQU8ByyZiAGYqRpeEVDH7Y4gf9VIG4OqM4UXe7efGrsNvo OS7ly22ljn//4kBswQAAQoAHRYhBK5HCVcl5jElzssnkLqXzVK3lkFPBQJmKkaXAAoJELqXzVK3 lkFPs/wL/jpHxao1jpzbmpAJNwf97MqA7/3b8DaFm81ZOaUgl+xiQJ7aeGoNBn2D2FZuEOyU1ff MCD7toeXW67/TNlMF/xvUyZIZgl4hY9KQDbgOiZwujabrrTjDCci4jmmloV9IhLhZvH2B/3ZQh0 Xy05JPawBk2a4zcjMAtsLPCnBcZk0tpkowPoldMijracootK+n2GTAHl/nHo/0lXrjM+xMe+LJ7 hDKEVbszGzPo0Tcf7LWhtDKOKlo1b54QCnZDC+rPX/QLNm8kCiVIoHO7pSdu/0hjq8yRFOB8tL2 WjzWo9OD0DSZEPZQU4XUd9gMTp3OkTDliv7Z35kepaQZ+YenUvDi8ySNpSqYyprH4OgrkzBUG5e oqGZozcz4k1M7ezNf/Q76RD7fydE+CPiI2kU2K6tHnCCYeahko8Alhz1xQQ6XYlio9ey1V6gz2f MyrQbCtxHBvOYLdb2TZ0XL8PeIpBB7GOeqaML9Wils2nLsx1Hl9Cn6Ca19qGCQIYP7yqgB8evN/ Mw= X-Developer-Key: i=j.granados@samsung.com; a=openpgp; fpr=F1F8E46D30F0F6C4A45FF4465895FAAC338C6E77 X-Endpoint-Received: by B4 Relay for j.granados@samsung.com/default with auth_id=70 X-Original-From: Joel Granados Reply-To: j.granados@samsung.com From: Joel Granados This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) * Remove sentinel elements from ctl_table structs * Remove instances where an array element is zeroed out to make it look like a sentinel. This is not longer needed and is safe after commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added the array size to the ctl_table registration * Remove the need for having __NF_SYSCTL_CT_LAST_SYSCTL as the sysctl array size is now in NF_SYSCTL_CT_LAST_SYSCTL * Remove extra element in ctl_table arrays declarations Acked-by: Kees Cook # loadpin & yama Signed-off-by: Joel Granados --- net/bridge/br_netfilter_hooks.c | 1 - net/ipv6/netfilter/nf_conntrack_reasm.c | 1 - net/netfilter/ipvs/ip_vs_ctl.c | 5 +---- net/netfilter/ipvs/ip_vs_lblc.c | 5 +---- net/netfilter/ipvs/ip_vs_lblcr.c | 5 +---- net/netfilter/nf_conntrack_standalone.c | 6 +----- net/netfilter/nf_log.c | 3 +-- 7 files changed, 5 insertions(+), 21 deletions(-) diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c index 35e10c5a766d..d31f57ffe985 100644 --- a/net/bridge/br_netfilter_hooks.c +++ b/net/bridge/br_netfilter_hooks.c @@ -1219,7 +1219,6 @@ static struct ctl_table brnf_table[] = { .mode = 0644, .proc_handler = brnf_sysctl_call_tables, }, - { } }; static inline void br_netfilter_sysctl_default(struct brnf_net *brnf) diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c index 1a51a44571c3..8531750ec081 100644 --- a/net/ipv6/netfilter/nf_conntrack_reasm.c +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c @@ -62,7 +62,6 @@ static struct ctl_table nf_ct_frag6_sysctl_table[] = { .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, - { } }; static int nf_ct_frag6_sysctl_register(struct net *net) diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c index 143a341bbc0a..50b5dbe40eb8 100644 --- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -2263,7 +2263,6 @@ static struct ctl_table vs_vars[] = { .proc_handler = proc_dointvec, }, #endif - { } }; #endif @@ -4286,10 +4285,8 @@ static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) return -ENOMEM; /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - tbl[0].procname = NULL; + if (net->user_ns != &init_user_ns) ctl_table_size = 0; - } } else tbl = vs_vars; /* Initialize sysctl defaults */ diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c index 8ceec7a2fa8f..2423513d701d 100644 --- a/net/netfilter/ipvs/ip_vs_lblc.c +++ b/net/netfilter/ipvs/ip_vs_lblc.c @@ -123,7 +123,6 @@ static struct ctl_table vs_vars_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; #endif @@ -563,10 +562,8 @@ static int __net_init __ip_vs_lblc_init(struct net *net) return -ENOMEM; /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - ipvs->lblc_ctl_table[0].procname = NULL; + if (net->user_ns != &init_user_ns) vars_table_size = 0; - } } else ipvs->lblc_ctl_table = vs_vars_table; diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c index 0fb64707213f..cdb1d4bf6761 100644 --- a/net/netfilter/ipvs/ip_vs_lblcr.c +++ b/net/netfilter/ipvs/ip_vs_lblcr.c @@ -294,7 +294,6 @@ static struct ctl_table vs_vars_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { } }; #endif @@ -749,10 +748,8 @@ static int __net_init __ip_vs_lblcr_init(struct net *net) return -ENOMEM; /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - ipvs->lblcr_ctl_table[0].procname = NULL; + if (net->user_ns != &init_user_ns) vars_table_size = 0; - } } else ipvs->lblcr_ctl_table = vs_vars_table; ipvs->sysctl_lblcr_expiration = DEFAULT_EXPIRATION; diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index 0ee98ce5b816..2f226cfb32d0 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -616,11 +616,9 @@ enum nf_ct_sysctl_index { NF_SYSCTL_CT_LWTUNNEL, #endif - __NF_SYSCTL_CT_LAST_SYSCTL, + NF_SYSCTL_CT_LAST_SYSCTL, }; -#define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1) - static struct ctl_table nf_ct_sysctl_table[] = { [NF_SYSCTL_CT_MAX] = { .procname = "nf_conntrack_max", @@ -957,7 +955,6 @@ static struct ctl_table nf_ct_sysctl_table[] = { .proc_handler = nf_hooks_lwtunnel_sysctl_handler, }, #endif - {} }; static struct ctl_table nf_ct_netfilter_table[] = { @@ -968,7 +965,6 @@ static struct ctl_table nf_ct_netfilter_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net, diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c index 370f8231385c..d42ba733496b 100644 --- a/net/netfilter/nf_log.c +++ b/net/netfilter/nf_log.c @@ -395,7 +395,7 @@ static const struct seq_operations nflog_seq_ops = { #ifdef CONFIG_SYSCTL static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3]; -static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; +static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO]; static struct ctl_table_header *nf_log_sysctl_fhdr; static struct ctl_table nf_log_sysctl_ftable[] = { @@ -406,7 +406,6 @@ static struct ctl_table nf_log_sysctl_ftable[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { } }; static int nf_log_proc_dostring(struct ctl_table *table, int write, From patchwork Thu Apr 25 12:03:05 2024 Content-Type: text/plain; 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Thu, 25 Apr 2024 12:03:40 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:03:05 +0200 Subject: [PATCH v4 7/8] appletalk: Remove the now superfluous sentinel elements from ctl_table array Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-7-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. Wythe" , Tony Lu , Wen Gu , Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Jon Maloy , Ying Xue , Martin Schiller , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , Roopa Prabhu , Nikolay Aleksandrov , Simon Horman , Julian Anastasov , Joerg Reuter , Luis Chamberlain , Kees Cook Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dccp@vger.kernel.org, linux-wpan@vger.kernel.org, mptcp@lists.linux.dev, linux-hams@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-afs@lists.infradead.org, linux-sctp@vger.kernel.org, linux-s390@vger.kernel.org, linux-nfs@vger.kernel.org, tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, bridge@lists.linux.dev, lvs-devel@vger.kernel.org, Joel Granados X-Mailer: b4 0.13-dev-2d940 X-Developer-Signature: v=1; a=openpgp-sha256; l=1016; i=j.granados@samsung.com; h=from:subject:message-id; bh=7ZWigRPsHTDXgTA/blt/ZK1/GcOosAKMfp6DXoN0Jik=; b=owJ4nAHtARL+kA0DAAoBupfNUreWQU8ByyZiAGYqRpjxNMSiylxeozPo2ILChPZiYuHbTTem0 Pf3j3wo9SIQq4kBswQAAQoAHRYhBK5HCVcl5jElzssnkLqXzVK3lkFPBQJmKkaYAAoJELqXzVK3 lkFP32gL/jrkIX3LyuyYLpN96u6J7hYYFblxhEn2mRcexE52YvjNQARoirMF+7NS1zAWRF16q7H qNIQftrBBui12iCNWsd0BDEeryOgfqclMy3xiF/1r4xbSDY622PYqLZ7Cx3d0DBYHyn7HXjeWeS d2SZCdxPB5Nebc+JK7z3Vf1hMZwq/I27EMk2cPmJdfKFXLSs6zvOqQkA2gD72xoEYJnNTMkdrgq W37gxhtIY16xp8JGkf/qJJeiszNtTFWKak3eiyMhnv+lZHr8pzSajbx8PFDFKerTJbWgSoGv/m6 7X8IoEE3ms/TG6212cMz+j2x8qV4R5mZa7CNDcLDR1kBvFhOErqB4xXj/N6FpWBhQFHzpGsoy16 6jCq+OG4+OjaKhf9pjDN3GTLN8vR6GhS3n3sbK+GWd4M4KekkceHZLTrPJxLsQmaEfVrD8gTbjO dSKH7h+6ZRDIAKrnfrJLBlRhU4DIFLYtBQzLFV++v506LOVXcXdCwSNEIW5KpqqmKxoDSIet9+8 Uw= X-Developer-Key: i=j.granados@samsung.com; a=openpgp; fpr=F1F8E46D30F0F6C4A45FF4465895FAAC338C6E77 X-Endpoint-Received: by B4 Relay for j.granados@samsung.com/default with auth_id=70 X-Original-From: Joel Granados Reply-To: j.granados@samsung.com From: Joel Granados This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) Remove sentinel from atalk_table ctl_table array. Acked-by: Kees Cook # loadpin & yama Signed-off-by: Joel Granados --- net/appletalk/sysctl_net_atalk.c | 1 - 1 file changed, 1 deletion(-) diff --git a/net/appletalk/sysctl_net_atalk.c b/net/appletalk/sysctl_net_atalk.c index d945b7c0176d..7aebfe903242 100644 --- a/net/appletalk/sysctl_net_atalk.c +++ b/net/appletalk/sysctl_net_atalk.c @@ -40,7 +40,6 @@ static struct ctl_table atalk_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { }, }; static struct ctl_table_header *atalk_table_header; From patchwork Thu Apr 25 12:03:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Granados via B4 Relay X-Patchwork-Id: 13643240 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 A2A6612C555; Thu, 25 Apr 2024 12:03:40 +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=1714046620; cv=none; b=fDWwx2j8d0v9c2XLCxStLd7xbvEP+mInyY3y6ZrmliFIrUqOFfchZT3Mnod+weBfc2OEl2fQeHqbA1+kmG7xngcLmNGaFD4WbpqATZTAmTgmu4ThyfeB8y1ut2ix4uQr5+roN+3QQdvGBroUgg3ncwBjOlvSTNdUGBnBrMrKRgo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714046620; c=relaxed/simple; bh=GH2bezeza5fhtu1z47o7+tK1nF0tM45eNw6jY53xEPE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=oxMoZnyYPcMIOtfzzylGB/K93s5Y3AZ9aFCnOwhW+ya5n5ljDulSMP1tB7DUKOL4x+6gMX7syzvdYsd7uY2GNCJ4GdUY8anlJ1T3z0GmLy95GCyoV7hNPVzGkQHgUNcULtX5ZvX2wXpsKmerQowrJ5CG8EwSdNZVsjpHi8ssdKA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hlvwO97+; 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="hlvwO97+" Received: by smtp.kernel.org (Postfix) with ESMTPS id 57C80C4AF07; Thu, 25 Apr 2024 12:03:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714046620; bh=GH2bezeza5fhtu1z47o7+tK1nF0tM45eNw6jY53xEPE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=hlvwO97+skX0DnQ7KmoLQpuPjt5gbTop7ZeYcx75/u+/9Dz09gddrHv517YKzxw7w Qjy7nqjM8G86/k9CgiST/x5bMoYOIIcwOv30WR2ZV5/GarZzexpzOPDVcEibmCOghx 4hFik8LQp2ncQCjfaztxW2QBBoQ1tJmJeVoXovOuUKUq4y9quxWzEinehnlw2t14+1 fln8Odj11rSU4B4R6moihsXxptrLiHoliaLwWZIIPTW8WKm2wGlV83UhCzWIy74oaO YIUN3cxvWDIGUHcvrZL5yTE9XiDzORjnedQPSsWYJCP662KTMiXlQMjRtkzIwXld86 Je/gyqEIaFnAg== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DD62C10F15; Thu, 25 Apr 2024 12:03:40 +0000 (UTC) From: Joel Granados via B4 Relay Date: Thu, 25 Apr 2024 14:03:06 +0200 Subject: [PATCH v4 8/8] ax.25: x.25: Remove the now superfluous sentinel elements from ctl_table array Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-jag-sysctl_remset_net-v4-8-9e82f985777d@samsung.com> References: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> In-Reply-To: <20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexander Aring , Stefan Schmidt , Miquel Raynal , David Ahern , Steffen Klassert , Herbert Xu , Matthieu Baerts , Mat Martineau , Geliang Tang , Ralf Baechle , Remi Denis-Courmont , Allison Henderson , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Wenjia Zhang , Jan Karcher , "D. Wythe" , Tony Lu , Wen Gu , Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Jon Maloy , Ying Xue , Martin Schiller , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , Roopa Prabhu , Nikolay Aleksandrov , Simon Horman , Julian Anastasov , Joerg Reuter , Luis Chamberlain , Kees Cook Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dccp@vger.kernel.org, linux-wpan@vger.kernel.org, mptcp@lists.linux.dev, linux-hams@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-afs@lists.infradead.org, linux-sctp@vger.kernel.org, linux-s390@vger.kernel.org, linux-nfs@vger.kernel.org, tipc-discussion@lists.sourceforge.net, linux-x25@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, bridge@lists.linux.dev, lvs-devel@vger.kernel.org, Joel Granados X-Mailer: b4 0.13-dev-2d940 X-Developer-Signature: v=1; a=openpgp-sha256; l=3995; i=j.granados@samsung.com; h=from:subject:message-id; bh=NZnJW6XWgopf75vh1g8TgFTlOj8qaKFukPEjDf1p53c=; b=owJ4nAHtARL+kA0DAAoBupfNUreWQU8ByyZiAGYqRphNUhwxu2kexo/hYhmJ491ahYV7cLFwq w7VYyxuqYw7eokBswQAAQoAHRYhBK5HCVcl5jElzssnkLqXzVK3lkFPBQJmKkaYAAoJELqXzVK3 lkFP/g4L/Rw4jFAj8rRf+PUjXY8X6e94Tuaw6P4lDE+mlm7nTxevertGEyJPmkNLQDVRzXXjZ6x DIDWA6v0PSTnMQotoOGKoGWYNg5JfbvP4TLw874hFMnI6G9rxnbeOzwh1L7Ks+lwv48hoZ7danV hTUguAsJyW5uxY0s53pEEm7tZzUXkO2aHOldg2oqKyXaGeRsmif7sWTkdwww31zTzWRXWJ+dZpG nIxdmPJRJOjhU8L7Jw0NppJvjTdKjdCf3BqjlQfbwKqpU+pb6BJSSFJeOzMsAGpMbFOqqYyijt9 QHjSF8II19VF3jrxsRhb3ZGFHIY0v64VhBPZv3IeFm7cqaV7aSkSazJl8PLjCZCDQ0y24sR0Dpp Jl9tM99YG88VpBPncqPYzTrXWVwHs01y9eyV9iyTJozFFLoEAYvGC0Dvl8rnbNpTG5bD+T0eF6Z Eh162u2q2KdMYqraFWbaHk5T5OblKsB7S33tJM5YpdSKXmqW0g3RieYS9ac3pL7TWz4rwfyDdY6 8Y= X-Developer-Key: i=j.granados@samsung.com; a=openpgp; fpr=F1F8E46D30F0F6C4A45FF4465895FAAC338C6E77 X-Endpoint-Received: by B4 Relay for j.granados@samsung.com/default with auth_id=70 X-Original-From: Joel Granados Reply-To: j.granados@samsung.com From: Joel Granados This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) Avoid a buffer overflow when traversing the ctl_table by ensuring that AX25_MAX_VALUES is the same as the size of ax25_param_table. This is done with a BUILD_BUG_ON where ax25_param_table is defined and a CONFIG_AX25_DAMA_SLAVE guard in the unnamed enum definition as well as in the ax25_dev_device_up and ax25_ds_set_timer functions. The overflow happened when the sentinel was removed from ax25_param_table. The sentinel's data element was changed when CONFIG_AX25_DAMA_SLAVE was undefined. This had no adverse effects as it still stopped on the sentinel's null procname but needed to be addressed once the sentinel was removed. Signed-off-by: Joel Granados --- include/net/ax25.h | 2 ++ net/ax25/ax25_dev.c | 3 +++ net/ax25/ax25_ds_timer.c | 4 ++++ net/ax25/sysctl_net_ax25.c | 3 +-- net/x25/sysctl_net_x25.c | 1 - 5 files changed, 10 insertions(+), 3 deletions(-) diff --git a/include/net/ax25.h b/include/net/ax25.h index 0d939e5aee4e..eb9cee8252c8 100644 --- a/include/net/ax25.h +++ b/include/net/ax25.h @@ -139,7 +139,9 @@ enum { AX25_VALUES_N2, /* Default N2 value */ AX25_VALUES_PACLEN, /* AX.25 MTU */ AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */ +#ifdef CONFIG_AX25_DAMA_SLAVE AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */ +#endif AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */ }; diff --git a/net/ax25/ax25_dev.c b/net/ax25/ax25_dev.c index c5462486dbca..af547e185a94 100644 --- a/net/ax25/ax25_dev.c +++ b/net/ax25/ax25_dev.c @@ -78,7 +78,10 @@ void ax25_dev_device_up(struct net_device *dev) ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2; ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN; ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL; + +#ifdef CONFIG_AX25_DAMA_SLAVE ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT; +#endif #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) ax25_ds_setup_timer(ax25_dev); diff --git a/net/ax25/ax25_ds_timer.c b/net/ax25/ax25_ds_timer.c index c4f8adbf8144..8f385d2a7628 100644 --- a/net/ax25/ax25_ds_timer.c +++ b/net/ax25/ax25_ds_timer.c @@ -49,12 +49,16 @@ void ax25_ds_del_timer(ax25_dev *ax25_dev) void ax25_ds_set_timer(ax25_dev *ax25_dev) { +#ifdef CONFIG_AX25_DAMA_SLAVE if (ax25_dev == NULL) /* paranoia */ return; ax25_dev->dama.slave_timeout = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_DS_TIMEOUT]) / 10; mod_timer(&ax25_dev->dama.slave_timer, jiffies + HZ); +#else + return; +#endif } /* diff --git a/net/ax25/sysctl_net_ax25.c b/net/ax25/sysctl_net_ax25.c index db66e11e7fe8..4e593d36d311 100644 --- a/net/ax25/sysctl_net_ax25.c +++ b/net/ax25/sysctl_net_ax25.c @@ -141,8 +141,6 @@ static const struct ctl_table ax25_param_table[] = { .extra2 = &max_ds_timeout }, #endif - - { } /* that's all, folks! */ }; int ax25_register_dev_sysctl(ax25_dev *ax25_dev) @@ -155,6 +153,7 @@ int ax25_register_dev_sysctl(ax25_dev *ax25_dev) if (!table) return -ENOMEM; + BUILD_BUG_ON(ARRAY_SIZE(ax25_param_table) != AX25_MAX_VALUES); for (k = 0; k < AX25_MAX_VALUES; k++) table[k].data = &ax25_dev->values[k]; diff --git a/net/x25/sysctl_net_x25.c b/net/x25/sysctl_net_x25.c index e9802afa43d0..643f50874dfe 100644 --- a/net/x25/sysctl_net_x25.c +++ b/net/x25/sysctl_net_x25.c @@ -71,7 +71,6 @@ static struct ctl_table x25_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - { }, }; int __init x25_register_sysctl(void)