* [PATCH v2 net-next 1/3] net: dsa: fix incorrect function pointer check for MRP ring roles
2022-01-05 13:18 [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup Vladimir Oltean
@ 2022-01-05 13:18 ` Vladimir Oltean
2022-01-05 13:18 ` [PATCH v2 net-next 2/3] net: dsa: remove cross-chip support for MRP Vladimir Oltean
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Vladimir Oltean @ 2022-01-05 13:18 UTC (permalink / raw)
To: netdev
Cc: David S. Miller, Jakub Kicinski, Andrew Lunn, Vivien Didelot,
Florian Fainelli, Horatiu Vultur
The cross-chip notifier boilerplate code meant to check the presence of
ds->ops->port_mrp_add_ring_role before calling it, but checked
ds->ops->port_mrp_add instead, before calling
ds->ops->port_mrp_add_ring_role.
Therefore, a driver which implements one operation but not the other
would trigger a NULL pointer dereference.
There isn't any such driver in DSA yet, so there is no reason to
backport the change. Issue found through code inspection.
Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Fixes: c595c4330da0 ("net: dsa: add MRP support")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
v1->v2: patch is new
net/dsa/switch.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 393f2d8a860a..260d8e7d6e5a 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -729,7 +729,7 @@ static int
dsa_switch_mrp_add_ring_role(struct dsa_switch *ds,
struct dsa_notifier_mrp_ring_role_info *info)
{
- if (!ds->ops->port_mrp_add)
+ if (!ds->ops->port_mrp_add_ring_role)
return -EOPNOTSUPP;
if (ds->index == info->sw_index)
@@ -743,7 +743,7 @@ static int
dsa_switch_mrp_del_ring_role(struct dsa_switch *ds,
struct dsa_notifier_mrp_ring_role_info *info)
{
- if (!ds->ops->port_mrp_del)
+ if (!ds->ops->port_mrp_del_ring_role)
return -EOPNOTSUPP;
if (ds->index == info->sw_index)
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 net-next 2/3] net: dsa: remove cross-chip support for MRP
2022-01-05 13:18 [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup Vladimir Oltean
2022-01-05 13:18 ` [PATCH v2 net-next 1/3] net: dsa: fix incorrect function pointer check for MRP ring roles Vladimir Oltean
@ 2022-01-05 13:18 ` Vladimir Oltean
2022-01-05 13:18 ` [PATCH v2 net-next 3/3] net: dsa: remove cross-chip support for HSR Vladimir Oltean
2022-01-05 15:20 ` [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup patchwork-bot+netdevbpf
3 siblings, 0 replies; 5+ messages in thread
From: Vladimir Oltean @ 2022-01-05 13:18 UTC (permalink / raw)
To: netdev
Cc: David S. Miller, Jakub Kicinski, Andrew Lunn, Vivien Didelot,
Florian Fainelli, Horatiu Vultur
The cross-chip notifiers for MRP are bypass operations, meaning that
even though all switches in a tree are notified, only the switch
specified in the info structure is targeted.
We can eliminate the unnecessary complexity by deleting the cross-chip
notifier logic and calling the ds->ops straight from port.c.
Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
v1->v2: delete leftover definitions of struct dsa_notifier_mrp_info and
struct dsa_notifier_mrp_ring_role_info.
net/dsa/dsa_priv.h | 18 -------------
net/dsa/port.c | 44 +++++++++++++++----------------
net/dsa/switch.c | 64 ----------------------------------------------
3 files changed, 20 insertions(+), 106 deletions(-)
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index b5ae21f172a8..c593d56c94b3 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -40,10 +40,6 @@ enum {
DSA_NOTIFIER_TAG_PROTO,
DSA_NOTIFIER_TAG_PROTO_CONNECT,
DSA_NOTIFIER_TAG_PROTO_DISCONNECT,
- DSA_NOTIFIER_MRP_ADD,
- DSA_NOTIFIER_MRP_DEL,
- DSA_NOTIFIER_MRP_ADD_RING_ROLE,
- DSA_NOTIFIER_MRP_DEL_RING_ROLE,
DSA_NOTIFIER_TAG_8021Q_VLAN_ADD,
DSA_NOTIFIER_TAG_8021Q_VLAN_DEL,
};
@@ -107,20 +103,6 @@ struct dsa_notifier_tag_proto_info {
const struct dsa_device_ops *tag_ops;
};
-/* DSA_NOTIFIER_MRP_* */
-struct dsa_notifier_mrp_info {
- const struct switchdev_obj_mrp *mrp;
- int sw_index;
- int port;
-};
-
-/* DSA_NOTIFIER_MRP_* */
-struct dsa_notifier_mrp_ring_role_info {
- const struct switchdev_obj_ring_role_mrp *mrp;
- int sw_index;
- int port;
-};
-
/* DSA_NOTIFIER_TAG_8021Q_VLAN_* */
struct dsa_notifier_tag_8021q_vlan_info {
int tree_index;
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 05677e016982..05be4577b044 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -907,49 +907,45 @@ int dsa_port_vlan_del(struct dsa_port *dp,
int dsa_port_mrp_add(const struct dsa_port *dp,
const struct switchdev_obj_mrp *mrp)
{
- struct dsa_notifier_mrp_info info = {
- .sw_index = dp->ds->index,
- .port = dp->index,
- .mrp = mrp,
- };
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_add)
+ return -EOPNOTSUPP;
- return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
+ return ds->ops->port_mrp_add(ds, dp->index, mrp);
}
int dsa_port_mrp_del(const struct dsa_port *dp,
const struct switchdev_obj_mrp *mrp)
{
- struct dsa_notifier_mrp_info info = {
- .sw_index = dp->ds->index,
- .port = dp->index,
- .mrp = mrp,
- };
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_del)
+ return -EOPNOTSUPP;
- return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
+ return ds->ops->port_mrp_del(ds, dp->index, mrp);
}
int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
const struct switchdev_obj_ring_role_mrp *mrp)
{
- struct dsa_notifier_mrp_ring_role_info info = {
- .sw_index = dp->ds->index,
- .port = dp->index,
- .mrp = mrp,
- };
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_add_ring_role)
+ return -EOPNOTSUPP;
- return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
+ return ds->ops->port_mrp_add_ring_role(ds, dp->index, mrp);
}
int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
const struct switchdev_obj_ring_role_mrp *mrp)
{
- struct dsa_notifier_mrp_ring_role_info info = {
- .sw_index = dp->ds->index,
- .port = dp->index,
- .mrp = mrp,
- };
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_mrp_del_ring_role)
+ return -EOPNOTSUPP;
- return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
+ return ds->ops->port_mrp_del_ring_role(ds, dp->index, mrp);
}
void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 260d8e7d6e5a..a164ec02b4e9 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -701,58 +701,6 @@ dsa_switch_disconnect_tag_proto(struct dsa_switch *ds,
return 0;
}
-static int dsa_switch_mrp_add(struct dsa_switch *ds,
- struct dsa_notifier_mrp_info *info)
-{
- if (!ds->ops->port_mrp_add)
- return -EOPNOTSUPP;
-
- if (ds->index == info->sw_index)
- return ds->ops->port_mrp_add(ds, info->port, info->mrp);
-
- return 0;
-}
-
-static int dsa_switch_mrp_del(struct dsa_switch *ds,
- struct dsa_notifier_mrp_info *info)
-{
- if (!ds->ops->port_mrp_del)
- return -EOPNOTSUPP;
-
- if (ds->index == info->sw_index)
- return ds->ops->port_mrp_del(ds, info->port, info->mrp);
-
- return 0;
-}
-
-static int
-dsa_switch_mrp_add_ring_role(struct dsa_switch *ds,
- struct dsa_notifier_mrp_ring_role_info *info)
-{
- if (!ds->ops->port_mrp_add_ring_role)
- return -EOPNOTSUPP;
-
- if (ds->index == info->sw_index)
- return ds->ops->port_mrp_add_ring_role(ds, info->port,
- info->mrp);
-
- return 0;
-}
-
-static int
-dsa_switch_mrp_del_ring_role(struct dsa_switch *ds,
- struct dsa_notifier_mrp_ring_role_info *info)
-{
- if (!ds->ops->port_mrp_del_ring_role)
- return -EOPNOTSUPP;
-
- if (ds->index == info->sw_index)
- return ds->ops->port_mrp_del_ring_role(ds, info->port,
- info->mrp);
-
- return 0;
-}
-
static int dsa_switch_event(struct notifier_block *nb,
unsigned long event, void *info)
{
@@ -826,18 +774,6 @@ static int dsa_switch_event(struct notifier_block *nb,
case DSA_NOTIFIER_TAG_PROTO_DISCONNECT:
err = dsa_switch_disconnect_tag_proto(ds, info);
break;
- case DSA_NOTIFIER_MRP_ADD:
- err = dsa_switch_mrp_add(ds, info);
- break;
- case DSA_NOTIFIER_MRP_DEL:
- err = dsa_switch_mrp_del(ds, info);
- break;
- case DSA_NOTIFIER_MRP_ADD_RING_ROLE:
- err = dsa_switch_mrp_add_ring_role(ds, info);
- break;
- case DSA_NOTIFIER_MRP_DEL_RING_ROLE:
- err = dsa_switch_mrp_del_ring_role(ds, info);
- break;
case DSA_NOTIFIER_TAG_8021Q_VLAN_ADD:
err = dsa_switch_tag_8021q_vlan_add(ds, info);
break;
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 net-next 3/3] net: dsa: remove cross-chip support for HSR
2022-01-05 13:18 [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup Vladimir Oltean
2022-01-05 13:18 ` [PATCH v2 net-next 1/3] net: dsa: fix incorrect function pointer check for MRP ring roles Vladimir Oltean
2022-01-05 13:18 ` [PATCH v2 net-next 2/3] net: dsa: remove cross-chip support for MRP Vladimir Oltean
@ 2022-01-05 13:18 ` Vladimir Oltean
2022-01-05 15:20 ` [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup patchwork-bot+netdevbpf
3 siblings, 0 replies; 5+ messages in thread
From: Vladimir Oltean @ 2022-01-05 13:18 UTC (permalink / raw)
To: netdev
Cc: David S. Miller, Jakub Kicinski, Andrew Lunn, Vivien Didelot,
Florian Fainelli, George McCollister
The cross-chip notifiers for HSR are bypass operations, meaning that
even though all switches in a tree are notified, only the switch
specified in the info structure is targeted.
We can eliminate the unnecessary complexity by deleting the cross-chip
notifier logic and calling the ds->ops straight from port.c.
Cc: George McCollister <george.mccollister@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: George McCollister <george.mccollister@gmail.com>
---
v1->v2:
- delete leftover definition of struct dsa_notifier_hsr_info
- guard against absence of ds->ops->port_hsr_join and
ds->ops->port_hsr_leave
net/dsa/dsa_priv.h | 9 ---------
net/dsa/port.c | 29 +++++++++++++----------------
net/dsa/switch.c | 24 ------------------------
3 files changed, 13 insertions(+), 49 deletions(-)
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index c593d56c94b3..760306f0012f 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -25,8 +25,6 @@ enum {
DSA_NOTIFIER_FDB_DEL,
DSA_NOTIFIER_HOST_FDB_ADD,
DSA_NOTIFIER_HOST_FDB_DEL,
- DSA_NOTIFIER_HSR_JOIN,
- DSA_NOTIFIER_HSR_LEAVE,
DSA_NOTIFIER_LAG_CHANGE,
DSA_NOTIFIER_LAG_JOIN,
DSA_NOTIFIER_LAG_LEAVE,
@@ -125,13 +123,6 @@ struct dsa_switchdev_event_work {
bool host_addr;
};
-/* DSA_NOTIFIER_HSR_* */
-struct dsa_notifier_hsr_info {
- struct net_device *hsr;
- int sw_index;
- int port;
-};
-
struct dsa_slave_priv {
/* Copy of CPU port xmit for faster access in slave transmit hot path */
struct sk_buff * (*xmit)(struct sk_buff *skb,
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 05be4577b044..bd78192e0e47 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -1317,16 +1317,15 @@ EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
{
- struct dsa_notifier_hsr_info info = {
- .sw_index = dp->ds->index,
- .port = dp->index,
- .hsr = hsr,
- };
+ struct dsa_switch *ds = dp->ds;
int err;
+ if (!ds->ops->port_hsr_join)
+ return -EOPNOTSUPP;
+
dp->hsr_dev = hsr;
- err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_JOIN, &info);
+ err = ds->ops->port_hsr_join(ds, dp->index, hsr);
if (err)
dp->hsr_dev = NULL;
@@ -1335,20 +1334,18 @@ int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr)
{
- struct dsa_notifier_hsr_info info = {
- .sw_index = dp->ds->index,
- .port = dp->index,
- .hsr = hsr,
- };
+ struct dsa_switch *ds = dp->ds;
int err;
dp->hsr_dev = NULL;
- err = dsa_port_notify(dp, DSA_NOTIFIER_HSR_LEAVE, &info);
- if (err)
- dev_err(dp->ds->dev,
- "port %d failed to notify DSA_NOTIFIER_HSR_LEAVE: %pe\n",
- dp->index, ERR_PTR(err));
+ if (ds->ops->port_hsr_leave) {
+ err = ds->ops->port_hsr_leave(ds, dp->index, hsr);
+ if (err)
+ dev_err(dp->ds->dev,
+ "port %d failed to leave HSR %s: %pe\n",
+ dp->index, hsr->name, ERR_PTR(err));
+ }
}
int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast)
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index a164ec02b4e9..e3c7d2627a61 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -437,24 +437,6 @@ static int dsa_switch_fdb_del(struct dsa_switch *ds,
return dsa_port_do_fdb_del(dp, info->addr, info->vid);
}
-static int dsa_switch_hsr_join(struct dsa_switch *ds,
- struct dsa_notifier_hsr_info *info)
-{
- if (ds->index == info->sw_index && ds->ops->port_hsr_join)
- return ds->ops->port_hsr_join(ds, info->port, info->hsr);
-
- return -EOPNOTSUPP;
-}
-
-static int dsa_switch_hsr_leave(struct dsa_switch *ds,
- struct dsa_notifier_hsr_info *info)
-{
- if (ds->index == info->sw_index && ds->ops->port_hsr_leave)
- return ds->ops->port_hsr_leave(ds, info->port, info->hsr);
-
- return -EOPNOTSUPP;
-}
-
static int dsa_switch_lag_change(struct dsa_switch *ds,
struct dsa_notifier_lag_info *info)
{
@@ -729,12 +711,6 @@ static int dsa_switch_event(struct notifier_block *nb,
case DSA_NOTIFIER_HOST_FDB_DEL:
err = dsa_switch_host_fdb_del(ds, info);
break;
- case DSA_NOTIFIER_HSR_JOIN:
- err = dsa_switch_hsr_join(ds, info);
- break;
- case DSA_NOTIFIER_HSR_LEAVE:
- err = dsa_switch_hsr_leave(ds, info);
- break;
case DSA_NOTIFIER_LAG_CHANGE:
err = dsa_switch_lag_change(ds, info);
break;
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup
2022-01-05 13:18 [PATCH v2 net-next 0/3] DSA cross-chip notifier cleanup Vladimir Oltean
` (2 preceding siblings ...)
2022-01-05 13:18 ` [PATCH v2 net-next 3/3] net: dsa: remove cross-chip support for HSR Vladimir Oltean
@ 2022-01-05 15:20 ` patchwork-bot+netdevbpf
3 siblings, 0 replies; 5+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-01-05 15:20 UTC (permalink / raw)
To: Vladimir Oltean
Cc: netdev, davem, kuba, andrew, vivien.didelot, f.fainelli,
horatiu.vultur, george.mccollister
Hello:
This series was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:
On Wed, 5 Jan 2022 15:18:10 +0200 you wrote:
> This series deletes the no-op cross-chip notifier support for MRP and
> HSR, features which were introduced relatively recently and did not get
> full review at the time. The new code is functionally equivalent, but
> simpler.
>
> Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
> Cc: George McCollister <george.mccollister@gmail.com>
>
> [...]
Here is the summary with links:
- [v2,net-next,1/3] net: dsa: fix incorrect function pointer check for MRP ring roles
https://git.kernel.org/netdev/net-next/c/ff91e1b68490
- [v2,net-next,2/3] net: dsa: remove cross-chip support for MRP
https://git.kernel.org/netdev/net-next/c/cad69019f2f8
- [v2,net-next,3/3] net: dsa: remove cross-chip support for HSR
https://git.kernel.org/netdev/net-next/c/a68dc7b938fb
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 5+ messages in thread