From be6fe1d8e1023bd80e122fa5eeeaff2ce66e9247 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Mon, 25 Feb 2019 19:34:07 -0800 Subject: [PATCH] devlink: require non-NULL ops for devlink instances Commit 76726ccb7f46 ("devlink: add flash update command") and commit 2d8dc5bbf4e7 ("devlink: Add support for reload") access devlink ops without NULL-checking. There is, however, no driver which would pass in NULL ops, so let's just make that a requirement. Remove the now unnecessary NULL-checking. Signed-off-by: Jakub Kicinski Reviewed-by: Florian Fainelli Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- net/core/devlink.c | 48 +++++++++++++++++++++------------------------- 1 file changed, 22 insertions(+), 26 deletions(-) diff --git a/net/core/devlink.c b/net/core/devlink.c index ecff6e63bc4d..a49dee67e66f 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -723,7 +723,7 @@ static int devlink_port_type_set(struct devlink *devlink, { int err; - if (devlink->ops && devlink->ops->port_type_set) { + if (devlink->ops->port_type_set) { if (port_type == DEVLINK_PORT_TYPE_NOTSET) return -EINVAL; if (port_type == devlink_port->type) @@ -760,7 +760,7 @@ 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) + if (devlink->ops->port_split) return devlink->ops->port_split(devlink, port_index, count, extack); return -EOPNOTSUPP; @@ -786,7 +786,7 @@ static int devlink_port_unsplit(struct devlink *devlink, u32 port_index, struct netlink_ext_ack *extack) { - if (devlink->ops && devlink->ops->port_unsplit) + if (devlink->ops->port_unsplit) return devlink->ops->port_unsplit(devlink, port_index, extack); return -EOPNOTSUPP; } @@ -961,7 +961,7 @@ static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb, if (err) return err; - if (!devlink->ops || !devlink->ops->sb_pool_get) + if (!devlink->ops->sb_pool_get) return -EOPNOTSUPP; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); @@ -1017,7 +1017,7 @@ static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg, mutex_lock(&devlink_mutex); list_for_each_entry(devlink, &devlink_list, list) { if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) || - !devlink->ops || !devlink->ops->sb_pool_get) + !devlink->ops->sb_pool_get) continue; mutex_lock(&devlink->lock); list_for_each_entry(devlink_sb, &devlink->sb_list, list) { @@ -1046,7 +1046,7 @@ static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index, { const struct devlink_ops *ops = devlink->ops; - if (ops && ops->sb_pool_set) + if (ops->sb_pool_set) return ops->sb_pool_set(devlink, sb_index, pool_index, size, threshold_type); return -EOPNOTSUPP; @@ -1151,7 +1151,7 @@ static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb, if (err) return err; - if (!devlink->ops || !devlink->ops->sb_port_pool_get) + if (!devlink->ops->sb_port_pool_get) return -EOPNOTSUPP; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); @@ -1213,7 +1213,7 @@ static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg, mutex_lock(&devlink_mutex); list_for_each_entry(devlink, &devlink_list, list) { if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) || - !devlink->ops || !devlink->ops->sb_port_pool_get) + !devlink->ops->sb_port_pool_get) continue; mutex_lock(&devlink->lock); list_for_each_entry(devlink_sb, &devlink->sb_list, list) { @@ -1242,7 +1242,7 @@ static int devlink_sb_port_pool_set(struct devlink_port *devlink_port, { const struct devlink_ops *ops = devlink_port->devlink->ops; - if (ops && ops->sb_port_pool_set) + if (ops->sb_port_pool_set) return ops->sb_port_pool_set(devlink_port, sb_index, pool_index, threshold); return -EOPNOTSUPP; @@ -1355,7 +1355,7 @@ static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb, if (err) return err; - if (!devlink->ops || !devlink->ops->sb_tc_pool_bind_get) + if (!devlink->ops->sb_tc_pool_bind_get) return -EOPNOTSUPP; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); @@ -1439,7 +1439,7 @@ devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg, mutex_lock(&devlink_mutex); list_for_each_entry(devlink, &devlink_list, list) { if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) || - !devlink->ops || !devlink->ops->sb_tc_pool_bind_get) + !devlink->ops->sb_tc_pool_bind_get) continue; mutex_lock(&devlink->lock); @@ -1471,7 +1471,7 @@ static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port, { const struct devlink_ops *ops = devlink_port->devlink->ops; - if (ops && ops->sb_tc_pool_bind_set) + if (ops->sb_tc_pool_bind_set) return ops->sb_tc_pool_bind_set(devlink_port, sb_index, tc_index, pool_type, pool_index, threshold); @@ -1519,7 +1519,7 @@ static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb, struct devlink_sb *devlink_sb = info->user_ptr[1]; const struct devlink_ops *ops = devlink->ops; - if (ops && ops->sb_occ_snapshot) + if (ops->sb_occ_snapshot) return ops->sb_occ_snapshot(devlink, devlink_sb->index); return -EOPNOTSUPP; } @@ -1531,7 +1531,7 @@ static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb, struct devlink_sb *devlink_sb = info->user_ptr[1]; const struct devlink_ops *ops = devlink->ops; - if (ops && ops->sb_occ_max_clear) + if (ops->sb_occ_max_clear) return ops->sb_occ_max_clear(devlink, devlink_sb->index); return -EOPNOTSUPP; } @@ -1594,13 +1594,9 @@ static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info) { struct devlink *devlink = info->user_ptr[0]; - const struct devlink_ops *ops = devlink->ops; struct sk_buff *msg; int err; - if (!ops) - return -EOPNOTSUPP; - msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -1625,9 +1621,6 @@ static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb, int err = 0; u16 mode; - if (!ops) - return -EOPNOTSUPP; - if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) { if (!ops->eswitch_mode_set) return -EOPNOTSUPP; @@ -3869,7 +3862,7 @@ static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb, struct sk_buff *msg; int err; - if (!devlink->ops || !devlink->ops->info_get) + if (!devlink->ops->info_get) return -EOPNOTSUPP; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); @@ -5232,6 +5225,9 @@ struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size) { struct devlink *devlink; + if (WARN_ON(!ops)) + return NULL; + devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL); if (!devlink) return NULL; @@ -6091,7 +6087,7 @@ __devlink_param_driverinit_value_set(struct devlink *devlink, int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id, union devlink_param_value *init_val) { - if (!devlink->ops || !devlink->ops->reload) + if (!devlink->ops->reload) return -EOPNOTSUPP; return __devlink_param_driverinit_value_get(&devlink->param_list, @@ -6138,7 +6134,7 @@ int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port, { struct devlink *devlink = devlink_port->devlink; - if (!devlink->ops || !devlink->ops->reload) + if (!devlink->ops->reload) return -EOPNOTSUPP; return __devlink_param_driverinit_value_get(&devlink_port->param_list, @@ -6435,7 +6431,7 @@ void devlink_compat_running_version(struct net_device *dev, mutex_lock(&devlink_mutex); devlink = netdev_to_devlink(dev); - if (!devlink || !devlink->ops || !devlink->ops->info_get) + if (!devlink || !devlink->ops->info_get) goto unlock_list; mutex_lock(&devlink->lock); @@ -6458,7 +6454,7 @@ int devlink_compat_flash_update(struct net_device *dev, const char *file_name) mutex_lock(&devlink_mutex); devlink = netdev_to_devlink(dev); - if (!devlink || !devlink->ops || !devlink->ops->flash_update) + if (!devlink || !devlink->ops->flash_update) goto unlock_list; mutex_lock(&devlink->lock); -- 2.45.2