B.A.T.M.A.N July 2022

b.a.t.m.a.n@lists.open-mesh.org

4 participants
8 discussions

Question about batman for ARM
by Charles Chien 01 Nov '22

01 Nov '22

Hello developers, We’re currently trying to install batman-adv on an ARM platform but we ran into some issues and we would appreciate your help to answer our questions below: Is the batman-adv module compatible with an ARM processor (Raspberry PI 4)? I’m trying to install batman-adv onto an ARM Raspberry PI 4 with a Debian based Linux distribution (Pop OS). However, when I run “modprobe batman-adv”, it returns a FATAL error complaining that the module is not found in the “/lib/modules” directory. Where can I find/download the “.ko” for batman-adv for the ARM platform? And if I need to recompile the .ko file for ARM, is there an online repository where I can find the original source code for the batman-adv driver? -- Regards, Charles

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[for-next][PATCH 02/21] batman-adv: tracing: Use the new __vstring() helper
by Steven Rostedt 31 Jul '22

31 Jul '22

From: "Steven Rostedt (Google)" <rostedt(a)goodmis.org> Instead of open coding a __dynamic_array() with a fixed length (which defeats the purpose of the dynamic array in the first place). Use the new __vstring() helper that will use a va_list and only write enough of the string into the ring buffer that is needed. Link: https://lkml.kernel.org/r/20220724191650.236b1355@rorschach.local.home Cc: Marek Lindner <mareklindner(a)neomailbox.ch> Cc: Ingo Molnar <mingo(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Simon Wunderlich <sw(a)simonwunderlich.de> Cc: Antonio Quartulli <a(a)unstable.cc> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Eric Dumazet <edumazet(a)google.com> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: Paolo Abeni <pabeni(a)redhat.com> Cc: b.a.t.m.a.n(a)lists.open-mesh.org Cc: netdev(a)vger.kernel.org Acked-by: Sven Eckelmann <sven(a)narfation.org> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- net/batman-adv/trace.h | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/net/batman-adv/trace.h b/net/batman-adv/trace.h index d673ebdd0426..31c8f922651d 100644 --- a/net/batman-adv/trace.h +++ b/net/batman-adv/trace.h @@ -28,8 +28,6 @@ #endif /* CONFIG_BATMAN_ADV_TRACING */ -#define BATADV_MAX_MSG_LEN 256 - TRACE_EVENT(batadv_dbg, TP_PROTO(struct batadv_priv *bat_priv, @@ -40,16 +38,13 @@ TRACE_EVENT(batadv_dbg, TP_STRUCT__entry( __string(device, bat_priv->soft_iface->name) __string(driver, KBUILD_MODNAME) - __dynamic_array(char, msg, BATADV_MAX_MSG_LEN) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(device, bat_priv->soft_iface->name); __assign_str(driver, KBUILD_MODNAME); - WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), - BATADV_MAX_MSG_LEN, - vaf->fmt, - *vaf->va) >= BATADV_MAX_MSG_LEN); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk( -- 2.35.1

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[PATCH v2] batman-adv: tracing: Use the new __vstring() helper
by Steven Rostedt 25 Jul '22

25 Jul '22

From: "Steven Rostedt (Google)" <rostedt(a)goodmis.org> Instead of open coding a __dynamic_array() with a fixed length (which defeats the purpose of the dynamic array in the first place). Use the new __vstring() helper that will use a va_list and only write enough of the string into the ring buffer that is needed. Cc: Marek Lindner <mareklindner(a)neomailbox.ch> Cc: Ingo Molnar <mingo(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Simon Wunderlich <sw(a)simonwunderlich.de> Cc: Antonio Quartulli <a(a)unstable.cc> Cc: Sven Eckelmann <sven(a)narfation.org> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Eric Dumazet <edumazet(a)google.com> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: Paolo Abeni <pabeni(a)redhat.com> Cc: b.a.t.m.a.n(a)lists.open-mesh.org Cc: netdev(a)vger.kernel.org Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- Changes since v1: https://lkml.kernel.org/r/20220705224751.080390002@goodmis.org - Removed no longer used BATADV_MAX_MSG_LEN net/batman-adv/trace.h | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/net/batman-adv/trace.h b/net/batman-adv/trace.h index d673ebdd0426..31c8f922651d 100644 --- a/net/batman-adv/trace.h +++ b/net/batman-adv/trace.h @@ -28,8 +28,6 @@ #endif /* CONFIG_BATMAN_ADV_TRACING */ -#define BATADV_MAX_MSG_LEN 256 - TRACE_EVENT(batadv_dbg, TP_PROTO(struct batadv_priv *bat_priv, @@ -40,16 +38,13 @@ TRACE_EVENT(batadv_dbg, TP_STRUCT__entry( __string(device, bat_priv->soft_iface->name) __string(driver, KBUILD_MODNAME) - __dynamic_array(char, msg, BATADV_MAX_MSG_LEN) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(device, bat_priv->soft_iface->name); __assign_str(driver, KBUILD_MODNAME); - WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), - BATADV_MAX_MSG_LEN, - vaf->fmt, - *vaf->va) >= BATADV_MAX_MSG_LEN); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk( -- 2.35.1

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[for-next][PATCH 17/23] batman-adv: tracing: Use the new __vstring() helper
by Steven Rostedt 24 Jul '22

24 Jul '22

2 2

[PATCH] batman-adv: tracing: Use the new __vstring() helper
by Sven Eckelmann 24 Jul '22

24 Jul '22

From: "Steven Rostedt (Google)" <rostedt(a)goodmis.org> Instead of open coding a __dynamic_array() with a fixed length (which defeats the purpose of the dynamic array in the first place). Use the new __vstring() helper that will use a va_list and only write enough of the string into the ring buffer that is needed. Link: https://lkml.kernel.org/r/20220705224751.080390002@goodmis.org Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> [sven(a)narfation.org: add compat code] Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- Already added to https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git/com… compat-include/linux/tracepoint.h | 24 ++++++++++++++++++++++++ net/batman-adv/trace.h | 7 ++----- 2 files changed, 26 insertions(+), 5 deletions(-) create mode 100644 compat-include/linux/tracepoint.h diff --git a/compat-include/linux/tracepoint.h b/compat-include/linux/tracepoint.h new file mode 100644 index 00000000..61df01a3 --- /dev/null +++ b/compat-include/linux/tracepoint.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This file contains macros for maintaining compatibility with older versions + * of the Linux kernel. + */ + +#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_TRACEPOINT_H_ +#define _NET_BATMAN_ADV_COMPAT_LINUX_TRACEPOINT_H_ + +#include <linux/version.h> +#include_next <linux/tracepoint.h> + +#if LINUX_VERSION_IS_LESS(5, 19, 0) + +#define __vstring(item, fmt, ap) __dynamic_array(char, item, 256) +#define __assign_vstr(dst, fmt, va) \ + WARN_ON_ONCE(vsnprintf(__get_dynamic_array(dst), 256, fmt, *va) >= 256) + +#endif /* LINUX_VERSION_IS_LESS(5, 19, 0) */ + +#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_TRACEPOINT_H_ */ diff --git a/net/batman-adv/trace.h b/net/batman-adv/trace.h index d673ebdd..67d2a8a0 100644 --- a/net/batman-adv/trace.h +++ b/net/batman-adv/trace.h @@ -40,16 +40,13 @@ TRACE_EVENT(batadv_dbg, TP_STRUCT__entry( __string(device, bat_priv->soft_iface->name) __string(driver, KBUILD_MODNAME) - __dynamic_array(char, msg, BATADV_MAX_MSG_LEN) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(device, bat_priv->soft_iface->name); __assign_str(driver, KBUILD_MODNAME); - WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), - BATADV_MAX_MSG_LEN, - vaf->fmt, - *vaf->va) >= BATADV_MAX_MSG_LEN); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk( -- 2.30.2

1 0

[PATCH 5.15] batman-adv: Use netif_rx_any_context() any.
by Sebastian Andrzej Siewior 23 Jul '22

23 Jul '22

This reverts the stable commit e65d78b12fbc0 ("batman-adv: Use netif_rx().") The commit message says: | Since commit | baebdf48c3600 ("net: dev: Makes sure netif_rx() can be invoked in any context.") | | the function netif_rx() can be used in preemptible/thread context as | well as in interrupt context. This commit (baebdf48c3600) has not been backported to the 5.15 stable series and therefore, the commit which builds upon it, must not be backported either. Revert the backport and use netif_rx_any_context() again. Signed-off-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> --- net/batman-adv/bridge_loop_avoidance.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 11f6ef657d822..17687848daec5 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -443,7 +443,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, skb->len + ETH_HLEN); - netif_rx(skb); + netif_rx_any_context(skb); out: batadv_hardif_put(primary_if); } -- 2.36.1

3 2

[PATCH 5.15 098/230] batman-adv: Use netif_rx().
by Greg Kroah-Hartman 11 Jul '22

11 Jul '22

From: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> [ Upstream commit 94da81e2fc4285db373fe9a1eb012c2ee205b110 ] Since commit baebdf48c3600 ("net: dev: Makes sure netif_rx() can be invoked in any context.") the function netif_rx() can be used in preemptible/thread context as well as in interrupt context. Use netif_rx(). Cc: Antonio Quartulli <a(a)unstable.cc> Cc: Marek Lindner <mareklindner(a)neomailbox.ch> Cc: Simon Wunderlich <sw(a)simonwunderlich.de> Cc: Sven Eckelmann <sven(a)narfation.org> Cc: b.a.t.m.a.n(a)lists.open-mesh.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Acked-by: Sven Eckelmann <sven(a)narfation.org> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- net/batman-adv/bridge_loop_avoidance.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 17687848daec..11f6ef657d82 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -443,7 +443,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, skb->len + ETH_HLEN); - netif_rx_any_context(skb); + netif_rx(skb); out: batadv_hardif_put(primary_if); } -- 2.35.1

1 0

[PATCH 12/13] batman-adv: tracing: Use the new __vstring() helper
by Steven Rostedt 05 Jul '22

05 Jul '22

1 0

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B.A.T.M.A.N July 2022