[PATCH net-next 0/3] devlink: Add extack messages for reload and port split/unsplit

[PATCH net-next 0/3] devlink: Add extack messages for reload and port split/unsplit

[dsahern]

From: David Ahern <dsahern@gmail.com>

Patch 1 adds extack arg to reload, port_split and port_unsplit devlink
operations.

Patch 2 adds extack messages for reload operation in netdevsim.

Patch 3 adds extack messages to port split/unsplit in mlxsw driver.

David Ahern (3):
  devlink: Add extack to reload and port_{un,}split operations
  netdevsim: Add extack error message for devlink reload
  mlxsw: Add extack messages for port_{un,}split failures

 drivers/net/ethernet/mellanox/mlxsw/core.c       | 23 ++++++++++++++++-------
 drivers/net/ethernet/mellanox/mlxsw/core.h       |  5 +++--
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c   | 13 +++++++++++--
 drivers/net/ethernet/netronome/nfp/nfp_devlink.c |  5 +++--
 drivers/net/netdevsim/devlink.c                  |  7 ++++---
 drivers/net/netdevsim/fib.c                      |  9 ++++++---
 drivers/net/netdevsim/netdevsim.h                |  3 ++-
 include/net/devlink.h                            |  7 ++++---
 net/core/devlink.c                               | 18 ++++++++++--------
 9 files changed, 59 insertions(+), 31 deletions(-)

-- 
2.11.0

[PATCH net-next 1/3] devlink: Add extack to reload and port_{un,}split operations

[dsahern]

From: David Ahern <dsahern@gmail.com>

Add extack argument to reload, port_split and port_unsplit operations.

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c       |  9 ++++++---
 drivers/net/ethernet/netronome/nfp/nfp_devlink.c |  5 +++--
 drivers/net/netdevsim/devlink.c                  |  3 ++-
 include/net/devlink.h                            |  7 ++++---
 net/core/devlink.c                               | 18 ++++++++++--------
 5 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 8a766fe28fa0..7ed38d80bc08 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -770,7 +770,8 @@ static void mlxsw_core_driver_put(const char *kind)
 
 static int mlxsw_devlink_port_split(struct devlink *devlink,
 				    unsigned int port_index,
-				    unsigned int count)
+				    unsigned int count,
+				    struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
@@ -782,7 +783,8 @@ static int mlxsw_devlink_port_split(struct devlink *devlink,
 }
 
 static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
-				      unsigned int port_index)
+				      unsigned int port_index,
+				      struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
@@ -963,7 +965,8 @@ mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port,
 						     pool_type, p_cur, p_max);
 }
 
-static int mlxsw_devlink_core_bus_device_reload(struct devlink *devlink)
+static int mlxsw_devlink_core_bus_device_reload(struct devlink *devlink,
+						struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 	int err;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index 71c2edd83031..db463e20a876 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -92,7 +92,7 @@ nfp_devlink_set_lanes(struct nfp_pf *pf, unsigned int idx, unsigned int lanes)
 
 static int
 nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
-		       unsigned int count)
+		       unsigned int count, struct netlink_ext_ack *extack)
 {
 	struct nfp_pf *pf = devlink_priv(devlink);
 	struct nfp_eth_table_port eth_port;
@@ -123,7 +123,8 @@ nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
 }
 
 static int
-nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index)
+nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index,
+			 struct netlink_ext_ack *extack)
 {
 	struct nfp_pf *pf = devlink_priv(devlink);
 	struct nfp_eth_table_port eth_port;
diff --git a/drivers/net/netdevsim/devlink.c b/drivers/net/netdevsim/devlink.c
index bef7db5d129a..e8366cf372ff 100644
--- a/drivers/net/netdevsim/devlink.c
+++ b/drivers/net/netdevsim/devlink.c
@@ -147,7 +147,8 @@ static int devlink_resources_register(struct devlink *devlink)
 	return err;
 }
 
-static int nsim_devlink_reload(struct devlink *devlink)
+static int nsim_devlink_reload(struct devlink *devlink,
+			       struct netlink_ext_ack *extack)
 {
 	enum nsim_resource_id res_ids[] = {
 		NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 9686a1aa4ec9..e336ea9c73df 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -296,12 +296,13 @@ struct devlink_resource {
 #define DEVLINK_RESOURCE_ID_PARENT_TOP 0
 
 struct devlink_ops {
-	int (*reload)(struct devlink *devlink);
+	int (*reload)(struct devlink *devlink, struct netlink_ext_ack *extack);
 	int (*port_type_set)(struct devlink_port *devlink_port,
 			     enum devlink_port_type port_type);
 	int (*port_split)(struct devlink *devlink, unsigned int port_index,
-			  unsigned int count);
-	int (*port_unsplit)(struct devlink *devlink, unsigned int port_index);
+			  unsigned int count, struct netlink_ext_ack *extack);
+	int (*port_unsplit)(struct devlink *devlink, unsigned int port_index,
+			    struct netlink_ext_ack *extack);
 	int (*sb_pool_get)(struct devlink *devlink, unsigned int sb_index,
 			   u16 pool_index,
 			   struct devlink_sb_pool_info *pool_info);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index f75ee022e6b2..22099705cc41 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -702,12 +702,13 @@ static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 	return 0;
 }
 
-static int devlink_port_split(struct devlink *devlink,
-			      u32 port_index, u32 count)
+static int devlink_port_split(struct devlink *devlink, u32 port_index,
+			      u32 count, struct netlink_ext_ack *extack)
 
 {
 	if (devlink->ops && devlink->ops->port_split)
-		return devlink->ops->port_split(devlink, port_index, count);
+		return devlink->ops->port_split(devlink, port_index, count,
+						extack);
 	return -EOPNOTSUPP;
 }
 
@@ -724,14 +725,15 @@ static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 
 	port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 	count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
-	return devlink_port_split(devlink, port_index, count);
+	return devlink_port_split(devlink, port_index, count, info->extack);
 }
 
-static int devlink_port_unsplit(struct devlink *devlink, u32 port_index)
+static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
+				struct netlink_ext_ack *extack)
 
 {
 	if (devlink->ops && devlink->ops->port_unsplit)
-		return devlink->ops->port_unsplit(devlink, port_index);
+		return devlink->ops->port_unsplit(devlink, port_index, extack);
 	return -EOPNOTSUPP;
 }
 
@@ -745,7 +747,7 @@ static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 		return -EINVAL;
 
 	port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
-	return devlink_port_unsplit(devlink, port_index);
+	return devlink_port_unsplit(devlink, port_index, info->extack);
 }
 
 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
@@ -2599,7 +2601,7 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
 		NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
 		return err;
 	}
-	return devlink->ops->reload(devlink);
+	return devlink->ops->reload(devlink, info->extack);
 }
 
 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
-- 
2.11.0

[PATCH net-next 2/3] netdevsim: Add extack error message for devlink reload

[dsahern]

From: David Ahern <dsahern@gmail.com>

devlink reset command can fail if a FIB resource limit is set to a value
lower than the current occupancy. Return a proper message indicating the
reason for the failure.

$ devlink resource sh netdevsim/netdevsim0
netdevsim/netdevsim0:
  name IPv4 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
    resources:
      name fib size unlimited occ 43 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
      name fib-rules size unlimited occ 4 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
  name IPv6 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
    resources:
      name fib size unlimited occ 54 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
      name fib-rules size unlimited occ 3 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none

$ devlink resource set netdevsim/netdevsim0 path /IPv4/fib size 40

$ devlink dev  reload netdevsim/netdevsim0
Error: netdevsim: New size is less than current occupancy.
devlink answers: Invalid argument

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 drivers/net/netdevsim/devlink.c   | 4 ++--
 drivers/net/netdevsim/fib.c       | 9 ++++++---
 drivers/net/netdevsim/netdevsim.h | 3 ++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/netdevsim/devlink.c b/drivers/net/netdevsim/devlink.c
index e8366cf372ff..ba663e5af168 100644
--- a/drivers/net/netdevsim/devlink.c
+++ b/drivers/net/netdevsim/devlink.c
@@ -163,7 +163,7 @@ static int nsim_devlink_reload(struct devlink *devlink,
 
 		err = devlink_resource_size_get(devlink, res_ids[i], &val);
 		if (!err) {
-			err = nsim_fib_set_max(net, res_ids[i], val);
+			err = nsim_fib_set_max(net, res_ids[i], val, extack);
 			if (err)
 				return err;
 		}
@@ -181,7 +181,7 @@ static void nsim_devlink_net_reset(struct net *net)
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(res_ids); ++i) {
-		if (nsim_fib_set_max(net, res_ids[i], (u64)-1)) {
+		if (nsim_fib_set_max(net, res_ids[i], (u64)-1, NULL)) {
 			pr_err("Failed to reset limit for resource %u\n",
 			       res_ids[i]);
 		}
diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c
index 9bfe9e151e13..f61d094746c0 100644
--- a/drivers/net/netdevsim/fib.c
+++ b/drivers/net/netdevsim/fib.c
@@ -64,7 +64,8 @@ u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max)
 	return max ? entry->max : entry->num;
 }
 
-int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val)
+int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val,
+		     struct netlink_ext_ack *extack)
 {
 	struct nsim_fib_data *fib_data = net_generic(net, nsim_fib_net_id);
 	struct nsim_fib_entry *entry;
@@ -90,10 +91,12 @@ int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val)
 	/* not allowing a new max to be less than curren occupancy
 	 * --> no means of evicting entries
 	 */
-	if (val < entry->num)
+	if (val < entry->num) {
+		NL_SET_ERR_MSG_MOD(extack, "New size is less than current occupancy");
 		err = -EINVAL;
-	else
+	} else {
 		entry->max = val;
+	}
 
 	return err;
 }
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index 3a8581af3b85..8ca50b72c328 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -126,7 +126,8 @@ void nsim_devlink_exit(void);
 int nsim_fib_init(void);
 void nsim_fib_exit(void);
 u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max);
-int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val);
+int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val,
+		     struct netlink_ext_ack *extack);
 #else
 static inline int nsim_devlink_setup(struct netdevsim *ns)
 {
-- 
2.11.0

[PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures

[dsahern]

From: David Ahern <dsahern@gmail.com>

Return messages in extack for port split/unsplit errors. e.g.,
    $ devlink port split swp1s1 count 4
    Error: mlxsw_spectrum: Port cannot be split further.
    devlink answers: Invalid argument

    $ devlink port unsplit swp4
    Error: mlxsw_spectrum: Port was not split.
    devlink answers: Invalid argument

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c     | 14 ++++++++++----
 drivers/net/ethernet/mellanox/mlxsw/core.h     |  5 +++--
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 13 +++++++++++--
 3 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 7ed38d80bc08..f9c724752a32 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -775,11 +775,14 @@ static int mlxsw_devlink_port_split(struct devlink *devlink,
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
-	if (port_index >= mlxsw_core->max_ports)
+	if (port_index >= mlxsw_core->max_ports) {
+		NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
 		return -EINVAL;
+	}
 	if (!mlxsw_core->driver->port_split)
 		return -EOPNOTSUPP;
-	return mlxsw_core->driver->port_split(mlxsw_core, port_index, count);
+	return mlxsw_core->driver->port_split(mlxsw_core, port_index, count,
+					      extack);
 }
 
 static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
@@ -788,11 +791,14 @@ static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 
-	if (port_index >= mlxsw_core->max_ports)
+	if (port_index >= mlxsw_core->max_ports) {
+		NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
 		return -EINVAL;
+	}
 	if (!mlxsw_core->driver->port_unsplit)
 		return -EOPNOTSUPP;
-	return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index);
+	return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index,
+						extack);
 }
 
 static int
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
index 4a8d4c7f89d9..552cfa29c2f7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.h
@@ -274,8 +274,9 @@ struct mlxsw_driver {
 	int (*port_type_set)(struct mlxsw_core *mlxsw_core, u8 local_port,
 			     enum devlink_port_type new_type);
 	int (*port_split)(struct mlxsw_core *mlxsw_core, u8 local_port,
-			  unsigned int count);
-	int (*port_unsplit)(struct mlxsw_core *mlxsw_core, u8 local_port);
+			  unsigned int count, struct netlink_ext_ack *extack);
+	int (*port_unsplit)(struct mlxsw_core *mlxsw_core, u8 local_port,
+			    struct netlink_ext_ack *extack);
 	int (*sb_pool_get)(struct mlxsw_core *mlxsw_core,
 			   unsigned int sb_index, u16 pool_index,
 			   struct devlink_sb_pool_info *pool_info);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index fc39f22e5c70..1b6d930e452d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -3092,7 +3092,8 @@ static void mlxsw_sp_port_unsplit_create(struct mlxsw_sp *mlxsw_sp,
 }
 
 static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
-			       unsigned int count)
+			       unsigned int count,
+			       struct netlink_ext_ack *extack)
 {
 	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
 	struct mlxsw_sp_port *mlxsw_sp_port;
@@ -3104,6 +3105,7 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
 	if (!mlxsw_sp_port) {
 		dev_err(mlxsw_sp->bus_info->dev, "Port number \"%d\" does not exist\n",
 			local_port);
+		NL_SET_ERR_MSG_MOD(extack, "Port number does not exist");
 		return -EINVAL;
 	}
 
@@ -3112,11 +3114,13 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
 
 	if (count != 2 && count != 4) {
 		netdev_err(mlxsw_sp_port->dev, "Port can only be split into 2 or 4 ports\n");
+		NL_SET_ERR_MSG_MOD(extack, "Port can only be split into 2 or 4 ports");
 		return -EINVAL;
 	}
 
 	if (cur_width != MLXSW_PORT_MODULE_MAX_WIDTH) {
 		netdev_err(mlxsw_sp_port->dev, "Port cannot be split further\n");
+		NL_SET_ERR_MSG_MOD(extack, "Port cannot be split further");
 		return -EINVAL;
 	}
 
@@ -3125,6 +3129,7 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
 		base_port = local_port;
 		if (mlxsw_sp->ports[base_port + 1]) {
 			netdev_err(mlxsw_sp_port->dev, "Invalid split configuration\n");
+			NL_SET_ERR_MSG_MOD(extack, "Invalid split configuration");
 			return -EINVAL;
 		}
 	} else {
@@ -3132,6 +3137,7 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
 		if (mlxsw_sp->ports[base_port + 1] ||
 		    mlxsw_sp->ports[base_port + 3]) {
 			netdev_err(mlxsw_sp_port->dev, "Invalid split configuration\n");
+			NL_SET_ERR_MSG_MOD(extack, "Invalid split configuration");
 			return -EINVAL;
 		}
 	}
@@ -3153,7 +3159,8 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
 	return err;
 }
 
-static int mlxsw_sp_port_unsplit(struct mlxsw_core *mlxsw_core, u8 local_port)
+static int mlxsw_sp_port_unsplit(struct mlxsw_core *mlxsw_core, u8 local_port,
+				 struct netlink_ext_ack *extack)
 {
 	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
 	struct mlxsw_sp_port *mlxsw_sp_port;
@@ -3165,11 +3172,13 @@ static int mlxsw_sp_port_unsplit(struct mlxsw_core *mlxsw_core, u8 local_port)
 	if (!mlxsw_sp_port) {
 		dev_err(mlxsw_sp->bus_info->dev, "Port number \"%d\" does not exist\n",
 			local_port);
+		NL_SET_ERR_MSG_MOD(extack, "Port number does not exist");
 		return -EINVAL;
 	}
 
 	if (!mlxsw_sp_port->split) {
 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
+		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
 		return -EINVAL;
 	}
 
-- 
2.11.0

Re: [PATCH net-next 2/3] netdevsim: Add extack error message for devlink reload

[Jakub Kicinski]

On Mon,  4 Jun 2018 15:15:02 -0700, dsahern@kernel.org wrote:
> From: David Ahern <dsahern@gmail.com>
> 
> devlink reset command can fail if a FIB resource limit is set to a value
> lower than the current occupancy. Return a proper message indicating the
> reason for the failure.
> 
> $ devlink resource sh netdevsim/netdevsim0
> netdevsim/netdevsim0:
>   name IPv4 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
>     resources:
>       name fib size unlimited occ 43 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
>       name fib-rules size unlimited occ 4 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
>   name IPv6 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
>     resources:
>       name fib size unlimited occ 54 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
>       name fib-rules size unlimited occ 3 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
> 
> $ devlink resource set netdevsim/netdevsim0 path /IPv4/fib size 40
> 
> $ devlink dev  reload netdevsim/netdevsim0
> Error: netdevsim: New size is less than current occupancy.
> devlink answers: Invalid argument
> 
> Signed-off-by: David Ahern <dsahern@gmail.com>

Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>

The entire set looks very useful, thanks!

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures

[Ido Schimmel]

On Mon, Jun 04, 2018 at 03:15:03PM -0700, dsahern@kernel.org wrote:
> From: David Ahern <dsahern@gmail.com>
> 
> Return messages in extack for port split/unsplit errors. e.g.,
>     $ devlink port split swp1s1 count 4
>     Error: mlxsw_spectrum: Port cannot be split further.
>     devlink answers: Invalid argument
> 
>     $ devlink port unsplit swp4
>     Error: mlxsw_spectrum: Port was not split.
>     devlink answers: Invalid argument
> 
> Signed-off-by: David Ahern <dsahern@gmail.com>

Reviewed-by: Ido Schimmel <idosch@mellanox.com>

Thanks!

Re: [PATCH net-next 1/3] devlink: Add extack to reload and port_{un,}split operations

[Jiri Pirko]

Tue, Jun 05, 2018 at 12:15:01AM CEST, dsahern@kernel.org wrote:
>From: David Ahern <dsahern@gmail.com>
>
>Add extack argument to reload, port_split and port_unsplit operations.
>
>Signed-off-by: David Ahern <dsahern@gmail.com>

Acked-by: Jiri Pirko <jiri@mellanox.com>

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures^[

[Jiri Pirko]

Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
>From: David Ahern <dsahern@gmail.com>
>
>Return messages in extack for port split/unsplit errors. e.g.,
>    $ devlink port split swp1s1 count 4
>    Error: mlxsw_spectrum: Port cannot be split further.
>    devlink answers: Invalid argument
>
>    $ devlink port unsplit swp4
>    Error: mlxsw_spectrum: Port was not split.
>    devlink answers: Invalid argument
>
>Signed-off-by: David Ahern <dsahern@gmail.com>
>---
> drivers/net/ethernet/mellanox/mlxsw/core.c     | 14 ++++++++++----
> drivers/net/ethernet/mellanox/mlxsw/core.h     |  5 +++--
> drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 13 +++++++++++--
> 3 files changed, 24 insertions(+), 8 deletions(-)
>
>diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
>index 7ed38d80bc08..f9c724752a32 100644
>--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
>+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
>@@ -775,11 +775,14 @@ static int mlxsw_devlink_port_split(struct devlink *devlink,
> {
> 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
> 
>-	if (port_index >= mlxsw_core->max_ports)
>+	if (port_index >= mlxsw_core->max_ports) {
>+		NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
> 		return -EINVAL;
>+	}
> 	if (!mlxsw_core->driver->port_split)
> 		return -EOPNOTSUPP;
>-	return mlxsw_core->driver->port_split(mlxsw_core, port_index, count);
>+	return mlxsw_core->driver->port_split(mlxsw_core, port_index, count,
>+					      extack);
> }
> 
> static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
>@@ -788,11 +791,14 @@ static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
> {
> 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
> 
>-	if (port_index >= mlxsw_core->max_ports)
>+	if (port_index >= mlxsw_core->max_ports) {
>+		NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
> 		return -EINVAL;
>+	}
> 	if (!mlxsw_core->driver->port_unsplit)
> 		return -EOPNOTSUPP;
>-	return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index);
>+	return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index,
>+						extack);
> }
> 
> static int
>diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
>index 4a8d4c7f89d9..552cfa29c2f7 100644
>--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
>+++ b/drivers/net/ethernet/mellanox/mlxsw/core.h
>@@ -274,8 +274,9 @@ struct mlxsw_driver {
> 	int (*port_type_set)(struct mlxsw_core *mlxsw_core, u8 local_port,
> 			     enum devlink_port_type new_type);
> 	int (*port_split)(struct mlxsw_core *mlxsw_core, u8 local_port,
>-			  unsigned int count);
>-	int (*port_unsplit)(struct mlxsw_core *mlxsw_core, u8 local_port);
>+			  unsigned int count, struct netlink_ext_ack *extack);
>+	int (*port_unsplit)(struct mlxsw_core *mlxsw_core, u8 local_port,
>+			    struct netlink_ext_ack *extack);
> 	int (*sb_pool_get)(struct mlxsw_core *mlxsw_core,
> 			   unsigned int sb_index, u16 pool_index,
> 			   struct devlink_sb_pool_info *pool_info);
>diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
>index fc39f22e5c70..1b6d930e452d 100644
>--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
>+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
>@@ -3092,7 +3092,8 @@ static void mlxsw_sp_port_unsplit_create(struct mlxsw_sp *mlxsw_sp,
> }
> 
> static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
>-			       unsigned int count)
>+			       unsigned int count,
>+			       struct netlink_ext_ack *extack)
> {
> 	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
> 	struct mlxsw_sp_port *mlxsw_sp_port;
>@@ -3104,6 +3105,7 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
> 	if (!mlxsw_sp_port) {
> 		dev_err(mlxsw_sp->bus_info->dev, "Port number \"%d\" does not exist\n",
> 			local_port);
>+		NL_SET_ERR_MSG_MOD(extack, "Port number does not exist");
> 		return -EINVAL;
> 	}
> 
>@@ -3112,11 +3114,13 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
> 
> 	if (count != 2 && count != 4) {
> 		netdev_err(mlxsw_sp_port->dev, "Port can only be split into 2 or 4 ports\n");
>+		NL_SET_ERR_MSG_MOD(extack, "Port can only be split into 2 or 4 ports");
> 		return -EINVAL;
> 	}
> 
> 	if (cur_width != MLXSW_PORT_MODULE_MAX_WIDTH) {
> 		netdev_err(mlxsw_sp_port->dev, "Port cannot be split further\n");
>+		NL_SET_ERR_MSG_MOD(extack, "Port cannot be split further");
> 		return -EINVAL;
> 	}
> 
>@@ -3125,6 +3129,7 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
> 		base_port = local_port;
> 		if (mlxsw_sp->ports[base_port + 1]) {
> 			netdev_err(mlxsw_sp_port->dev, "Invalid split configuration\n");
>+			NL_SET_ERR_MSG_MOD(extack, "Invalid split configuration");
> 			return -EINVAL;
> 		}
> 	} else {
>@@ -3132,6 +3137,7 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
> 		if (mlxsw_sp->ports[base_port + 1] ||
> 		    mlxsw_sp->ports[base_port + 3]) {
> 			netdev_err(mlxsw_sp_port->dev, "Invalid split configuration\n");
>+			NL_SET_ERR_MSG_MOD(extack, "Invalid split configuration");
> 			return -EINVAL;
> 		}
> 	}
>@@ -3153,7 +3159,8 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port,
> 	return err;
> }
> 
>-static int mlxsw_sp_port_unsplit(struct mlxsw_core *mlxsw_core, u8 local_port)
>+static int mlxsw_sp_port_unsplit(struct mlxsw_core *mlxsw_core, u8 local_port,
>+				 struct netlink_ext_ack *extack)
> {
> 	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
> 	struct mlxsw_sp_port *mlxsw_sp_port;
>@@ -3165,11 +3172,13 @@ static int mlxsw_sp_port_unsplit(struct mlxsw_core *mlxsw_core, u8 local_port)
> 	if (!mlxsw_sp_port) {
> 		dev_err(mlxsw_sp->bus_info->dev, "Port number \"%d\" does not exist\n",
> 			local_port);
>+		NL_SET_ERR_MSG_MOD(extack, "Port number does not exist");
> 		return -EINVAL;
> 	}
> 
> 	if (!mlxsw_sp_port->split) {
> 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
>+		NL_SET_ERR_MSG_MOD(extack, "Port was not split");

I wonder if we need the dmesg for these as well. Plus it is not the same
(wasn't/was not) which is maybe confusing. Any objection against the
original dmesg messages removal?


> 		return -EINVAL;
> 	}
> 
>-- 
>2.11.0
>

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures?

[Ido Schimmel]

On Tue, Jun 05, 2018 at 09:52:30AM +0200, Jiri Pirko wrote:
> Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
> > 	if (!mlxsw_sp_port->split) {
> > 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
> >+		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
> 
> I wonder if we need the dmesg for these as well. Plus it is not the same
> (wasn't/was not) which is maybe confusing. Any objection against the
> original dmesg messages removal?

We had this discussion about three months ago and decided to keep the
existing messages:
https://marc.info/?l=linux-netdev&m=151982813309466&w=2

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures?

[Jiri Pirko]

Tue, Jun 05, 2018 at 10:05:28AM CEST, idosch@idosch.org wrote:
>On Tue, Jun 05, 2018 at 09:52:30AM +0200, Jiri Pirko wrote:
>> Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
>> > 	if (!mlxsw_sp_port->split) {
>> > 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
>> >+		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
>> 
>> I wonder if we need the dmesg for these as well. Plus it is not the same
>> (wasn't/was not) which is maybe confusing. Any objection against the
>> original dmesg messages removal?
>
>We had this discussion about three months ago and decided to keep the
>existing messages:
>https://marc.info/?l=linux-netdev&m=151982813309466&w=2

I forgot. Thanks for reminding me. So could we at least have the
messages 100% same? Thanks.

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures?

[David Miller]

From: Jiri Pirko <jiri@resnulli.us>
Date: Tue, 5 Jun 2018 10:18:36 +0200

> Tue, Jun 05, 2018 at 10:05:28AM CEST, idosch@idosch.org wrote:
>>On Tue, Jun 05, 2018 at 09:52:30AM +0200, Jiri Pirko wrote:
>>> Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
>>> > 	if (!mlxsw_sp_port->split) {
>>> > 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
>>> >+		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
>>> 
>>> I wonder if we need the dmesg for these as well. Plus it is not the same
>>> (wasn't/was not) which is maybe confusing. Any objection against the
>>> original dmesg messages removal?
>>
>>We had this discussion about three months ago and decided to keep the
>>existing messages:
>>https://marc.info/?l=linux-netdev&m=151982813309466&w=2
> 
> I forgot. Thanks for reminding me. So could we at least have the
> messages 100% same? Thanks.

Seems like a reasonable request, David A.?

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures?

[David Ahern]

On 6/5/18 1:18 AM, Jiri Pirko wrote:
> Tue, Jun 05, 2018 at 10:05:28AM CEST, idosch@idosch.org wrote:
>> On Tue, Jun 05, 2018 at 09:52:30AM +0200, Jiri Pirko wrote:
>>> Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
>>>> 	if (!mlxsw_sp_port->split) {
>>>> 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
>>>> +		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
>>>
>>> I wonder if we need the dmesg for these as well. Plus it is not the same
>>> (wasn't/was not) which is maybe confusing. Any objection against the
>>> original dmesg messages removal?
>>
>> We had this discussion about three months ago and decided to keep the
>> existing messages:
>> https://marc.info/?l=linux-netdev&m=151982813309466&w=2
> 
> I forgot. Thanks for reminding me. So could we at least have the
> messages 100% same? Thanks.
> 

ok if I convert the current message to 'was not' and avoid the
contraction in messages?

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures?

[David Miller]

From: David Ahern <dsahern@gmail.com>
Date: Tue, 5 Jun 2018 07:58:44 -0700

> On 6/5/18 1:18 AM, Jiri Pirko wrote:
>> Tue, Jun 05, 2018 at 10:05:28AM CEST, idosch@idosch.org wrote:
>>> On Tue, Jun 05, 2018 at 09:52:30AM +0200, Jiri Pirko wrote:
>>>> Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
>>>>> 	if (!mlxsw_sp_port->split) {
>>>>> 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
>>>>> +		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
>>>>
>>>> I wonder if we need the dmesg for these as well. Plus it is not the same
>>>> (wasn't/was not) which is maybe confusing. Any objection against the
>>>> original dmesg messages removal?
>>>
>>> We had this discussion about three months ago and decided to keep the
>>> existing messages:
>>> https://marc.info/?l=linux-netdev&m=151982813309466&w=2
>> 
>> I forgot. Thanks for reminding me. So could we at least have the
>> messages 100% same? Thanks.
>> 
> 
> ok if I convert the current message to 'was not' and avoid the
> contraction in messages?

Sure.

Re: [PATCH net-next 3/3] mlxsw: Add extack messages for port_{un,}split failures?

[Jiri Pirko]

Tue, Jun 05, 2018 at 04:58:44PM CEST, dsahern@gmail.com wrote:
>On 6/5/18 1:18 AM, Jiri Pirko wrote:
>> Tue, Jun 05, 2018 at 10:05:28AM CEST, idosch@idosch.org wrote:
>>> On Tue, Jun 05, 2018 at 09:52:30AM +0200, Jiri Pirko wrote:
>>>> Tue, Jun 05, 2018 at 12:15:03AM CEST, dsahern@kernel.org wrote:
>>>>> 	if (!mlxsw_sp_port->split) {
>>>>> 		netdev_err(mlxsw_sp_port->dev, "Port wasn't split\n");
>>>>> +		NL_SET_ERR_MSG_MOD(extack, "Port was not split");
>>>>
>>>> I wonder if we need the dmesg for these as well. Plus it is not the same
>>>> (wasn't/was not) which is maybe confusing. Any objection against the
>>>> original dmesg messages removal?
>>>
>>> We had this discussion about three months ago and decided to keep the
>>> existing messages:
>>> https://marc.info/?l=linux-netdev&m=151982813309466&w=2
>> 
>> I forgot. Thanks for reminding me. So could we at least have the
>> messages 100% same? Thanks.
>> 
>
>ok if I convert the current message to 'was not' and avoid the
>contraction in messages?

Sure.