diff mbox series

[1/5] batman-adv: Trigger events for auto adjusted MTU

Message ID 20230816163318.189996-2-sw@simonwunderlich.de (mailing list archive)
State Accepted
Commit c6a953cce8d0438391e6da48c8d0793d3fbfcfa6
Delegated to: Netdev Maintainers
Headers show
Series [1/5] batman-adv: Trigger events for auto adjusted MTU | expand

Checks

Context Check Description
netdev/series_format warning Pull request is its own cover letter; Target tree name not specified in the subject
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1330 this patch: 1330
netdev/cc_maintainers warning 4 maintainers not CCed: edumazet@google.com a@unstable.cc mareklindner@neomailbox.ch pabeni@redhat.com
netdev/build_clang success Errors and warnings before: 1353 this patch: 1353
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 1353 this patch: 1353
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 8 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Simon Wunderlich Aug. 16, 2023, 4:33 p.m. UTC 
From: Sven Eckelmann <sven@narfation.org>

If an interface changes the MTU, it is expected that an NETDEV_PRECHANGEMTU
and NETDEV_CHANGEMTU notification events is triggered. This worked fine for
.ndo_change_mtu based changes because core networking code took care of it.
But for auto-adjustments after hard-interfaces changes, these events were
simply missing.

Due to this problem, non-batman-adv components weren't aware of MTU changes
and thus couldn't perform their own tasks correctly.

Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Cc: stable@vger.kernel.org
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 net/batman-adv/hard-interface.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

patchwork-bot+netdevbpf@kernel.org Aug. 18, 2023, 10:20 p.m. UTC | #1 
Hello:

This series was applied to netdev/net.git (main)
by Simon Wunderlich <sw@simonwunderlich.de>:

On Wed, 16 Aug 2023 18:33:14 +0200 you wrote:
> From: Sven Eckelmann <sven@narfation.org>
> 
> If an interface changes the MTU, it is expected that an NETDEV_PRECHANGEMTU
> and NETDEV_CHANGEMTU notification events is triggered. This worked fine for
> .ndo_change_mtu based changes because core networking code took care of it.
> But for auto-adjustments after hard-interfaces changes, these events were
> simply missing.
> 
> [...]

Here is the summary with links:
  - [1/5] batman-adv: Trigger events for auto adjusted MTU
    https://git.kernel.org/netdev/net/c/c6a953cce8d0
  - [2/5] batman-adv: Don't increase MTU when set by user
    https://git.kernel.org/netdev/net/c/d8e42a2b0add
  - [3/5] batman-adv: Do not get eth header before batadv_check_management_packet
    https://git.kernel.org/netdev/net/c/eac27a41ab64
  - [4/5] batman-adv: Fix TT global entry leak when client roamed back
    https://git.kernel.org/netdev/net/c/d25ddb7e788d
  - [5/5] batman-adv: Fix batadv_v_ogm_aggr_send memory leak
    https://git.kernel.org/netdev/net/c/421d467dc2d4

You are awesome, thank you!
diff mbox series

Patch

diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 41c1ad33d009..ae5762af0146 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -630,7 +630,7 @@  int batadv_hardif_min_mtu(struct net_device *soft_iface)
  */
 void batadv_update_min_mtu(struct net_device *soft_iface)
 {
-	soft_iface->mtu = batadv_hardif_min_mtu(soft_iface);
+	dev_set_mtu(soft_iface, batadv_hardif_min_mtu(soft_iface));
 
 	/* Check if the local translate table should be cleaned up to match a
 	 * new (and smaller) MTU.