diff mbox series

macvlan: Fix mc_filter calculation

Message ID ZCP6rRY+gargYJit@gondor.apana.org.au (mailing list archive)
State Accepted
Commit ae63ad9b2cc766bc4b3b6328e68dd27995abb0fe
Delegated to: Netdev Maintainers
Headers show
Series macvlan: Fix mc_filter calculation | expand

Checks

Context Check Description
netdev/series_format warning Single patches do not need cover letters; 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: 18 this patch: 18
netdev/cc_maintainers fail 1 blamed authors not CCed: davem@davemloft.net; 4 maintainers not CCed: kuba@kernel.org edumazet@google.com pabeni@redhat.com davem@davemloft.net
netdev/build_clang success Errors and warnings before: 18 this patch: 18
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: 18 this patch: 18
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 38 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Herbert Xu March 29, 2023, 8:45 a.m. UTC 
On Wed, Mar 29, 2023 at 08:10:26AM +0000, patchwork-bot+netdevbpf@kernel.org wrote:
> 
> Here is the summary with links:
>   - [1/2] macvlan: Skip broadcast queue if multicast with single receiver
>     https://git.kernel.org/netdev/net-next/c/d45276e75e90
>   - [2/2] macvlan: Add netlink attribute for broadcast cutoff
>     https://git.kernel.org/netdev/net-next/c/954d1fa1ac93

Sorry, I made an error and posted my patches from an earlier
revision so a follow-up fix was missing:

---8<---
The bc_cutoff patch broke the calculation of mc_filter causing
some multicast packets to not make it through to the targeted
device.

Fix this by checking whether vlan is set instead of cutoff >= 0.

Also move the cutoff < 0 logic into macvlan_recompute_bc_filter
so that it doesn't change the mc_filter at all.

Fixes: d45276e75e90 ("macvlan: Skip broadcast queue if multicast with single receiver")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

 drivers/net/macvlan.c |   15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org March 31, 2023, 8 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (main)
by David S. Miller <davem@davemloft.net>:

On Wed, 29 Mar 2023 16:45:33 +0800 you wrote:
> On Wed, Mar 29, 2023 at 08:10:26AM +0000, patchwork-bot+netdevbpf@kernel.org wrote:
> >
> > Here is the summary with links:
> >   - [1/2] macvlan: Skip broadcast queue if multicast with single receiver
> >     https://git.kernel.org/netdev/net-next/c/d45276e75e90
> >   - [2/2] macvlan: Add netlink attribute for broadcast cutoff
> >     https://git.kernel.org/netdev/net-next/c/954d1fa1ac93
> 
> [...]

Here is the summary with links:
  - macvlan: Fix mc_filter calculation
    https://git.kernel.org/netdev/net-next/c/ae63ad9b2cc7

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 4215106adc40..4a53debf9d7c 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -792,24 +792,20 @@  static void macvlan_compute_filter(unsigned long *mc_filter,
 				   struct macvlan_dev *vlan, int cutoff)
 {
 	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
-		if (cutoff >= 0)
-			bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ);
-		else
-			bitmap_zero(mc_filter, MACVLAN_MC_FILTER_SZ);
+		bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ);
 	} else {
 		DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
 		struct netdev_hw_addr *ha;
 
 		bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
 		netdev_for_each_mc_addr(ha, dev) {
-			if (cutoff >= 0 && ha->synced <= cutoff)
+			if (!vlan && ha->synced <= cutoff)
 				continue;
 
 			__set_bit(mc_hash(vlan, ha->addr), filter);
 		}
 
-		if (cutoff >= 0)
-			__set_bit(mc_hash(vlan, dev->broadcast), filter);
+		__set_bit(mc_hash(vlan, dev->broadcast), filter);
 
 		bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ);
 	}
@@ -817,6 +813,11 @@  static void macvlan_compute_filter(unsigned long *mc_filter,
 
 static void macvlan_recompute_bc_filter(struct macvlan_dev *vlan)
 {
+	if (vlan->port->bc_cutoff < 0) {
+		bitmap_zero(vlan->port->bc_filter, MACVLAN_MC_FILTER_SZ);
+		return;
+	}
+
 	macvlan_compute_filter(vlan->port->bc_filter, vlan->lowerdev, NULL,
 			       vlan->port->bc_cutoff);
 }