diff options
| -rw-r--r-- | net/core/net-sysfs.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index b39987c81d53..f25ac5ff48a6 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -1283,6 +1283,88 @@ static ssize_t xps_cpus_store(struct netdev_queue *queue, static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init = __ATTR_RW(xps_cpus); + +static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf) +{ + struct net_device *dev = queue->dev; + struct xps_dev_maps *dev_maps; + unsigned long *mask, index; + int j, len, num_tc = 1, tc = 0; + + index = get_netdev_queue_index(queue); + + if (dev->num_tc) { + num_tc = dev->num_tc; + tc = netdev_txq_to_tc(dev, index); + if (tc < 0) + return -EINVAL; + } + mask = kcalloc(BITS_TO_LONGS(dev->num_rx_queues), sizeof(long), + GFP_KERNEL); + if (!mask) + return -ENOMEM; + + rcu_read_lock(); + dev_maps = rcu_dereference(dev->xps_rxqs_map); + if (!dev_maps) + goto out_no_maps; + + for (j = -1; j = netif_attrmask_next(j, NULL, dev->num_rx_queues), + j < dev->num_rx_queues;) { + int i, tci = j * num_tc + tc; + struct xps_map *map; + + map = rcu_dereference(dev_maps->attr_map[tci]); + if (!map) + continue; + + for (i = map->len; i--;) { + if (map->queues[i] == index) { + set_bit(j, mask); + break; + } + } + } +out_no_maps: + rcu_read_unlock(); + + len = bitmap_print_to_pagebuf(false, buf, mask, dev->num_rx_queues); + kfree(mask); + + return len < PAGE_SIZE ? len : -EINVAL; +} + +static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf, + size_t len) +{ + struct net_device *dev = queue->dev; + struct net *net = dev_net(dev); + unsigned long *mask, index; + int err; + + if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) + return -EPERM; + + mask = kcalloc(BITS_TO_LONGS(dev->num_rx_queues), sizeof(long), + GFP_KERNEL); + if (!mask) + return -ENOMEM; + + index = get_netdev_queue_index(queue); + + err = bitmap_parse(buf, len, mask, dev->num_rx_queues); + if (err) { + kfree(mask); + return err; + } + + err = __netif_set_xps_queue(dev, mask, index, true); + kfree(mask); + return err ? : len; +} + +static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init + = __ATTR_RW(xps_rxqs); #endif /* CONFIG_XPS */ static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { @@ -1290,6 +1372,7 @@ static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { &queue_traffic_class.attr, #ifdef CONFIG_XPS &xps_cpus_attribute.attr, + &xps_rxqs_attribute.attr, &queue_tx_maxrate.attr, #endif NULL |