diff options
| author |   Michael Dalton <mwdalton@google.com> | 2014-01-16 22:23:28 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-01-16 23:46:06 -0800 |
| commit | a953be53ce40440acb4740edb48577b9468d4c3d (patch) | |
| tree | c9bef1d8ce80a7f2dc852f87bcd2a969ef34e1f8 /include/linux/netdevice.h | |
| parent | virtio-net: auto-tune mergeable rx buffer size for improved performance (diff) | |
| download | linux-dev-a953be53ce40440acb4740edb48577b9468d4c3d.tar.xz linux-dev-a953be53ce40440acb4740edb48577b9468d4c3d.zip | |
net-sysfs: add support for device-specific rx queue sysfs attributes
Extend existing support for netdevice receive queue sysfs attributes to
permit a device-specific attribute group. Initial use case for this
support will be to allow the virtio-net device to export per-receive
queue mergeable receive buffer size.
Signed-off-by: Michael Dalton <mwdalton@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index d7668b881d08..e985231fe04b 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -668,15 +668,28 @@ extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, u16 filter_id); #endif +#endif /* CONFIG_RPS */ /* This structure contains an instance of an RX queue. */ struct netdev_rx_queue { +#ifdef CONFIG_RPS struct rps_map __rcu *rps_map; struct rps_dev_flow_table __rcu *rps_flow_table; +#endif struct kobject kobj; struct net_device *dev; } ____cacheline_aligned_in_smp; -#endif /* CONFIG_RPS */ + +/* + * RX queue sysfs structures and functions. + */ +struct rx_queue_attribute { + struct attribute attr; + ssize_t (*show)(struct netdev_rx_queue *queue, + struct rx_queue_attribute *attr, char *buf); + ssize_t (*store)(struct netdev_rx_queue *queue, + struct rx_queue_attribute *attr, const char *buf, size_t len); +}; #ifdef CONFIG_XPS /* @@ -1313,7 +1326,7 @@ struct net_device { unicast) */ -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS struct netdev_rx_queue *_rx; /* Number of RX queues allocated at register_netdev() time */ @@ -1424,6 +1437,8 @@ struct net_device { struct device dev; /* space for optional device, statistics, and wireless sysfs groups */ const struct attribute_group *sysfs_groups[4]; + /* space for optional per-rx queue attributes */ + const struct attribute_group *sysfs_rx_queue_group; /* rtnetlink link ops */ const struct rtnl_link_ops *rtnl_link_ops; @@ -2375,7 +2390,7 @@ static inline bool netif_is_multiqueue(const struct net_device *dev) int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); #else static inline int netif_set_real_num_rx_queues(struct net_device *dev, @@ -2394,7 +2409,7 @@ static inline int netif_copy_real_num_queues(struct net_device *to_dev, from_dev->real_num_tx_queues); if (err) return err; -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS return netif_set_real_num_rx_queues(to_dev, from_dev->real_num_rx_queues); #else @@ -2402,6 +2417,18 @@ static inline int netif_copy_real_num_queues(struct net_device *to_dev, #endif } +#ifdef CONFIG_SYSFS +static inline unsigned int get_netdev_rx_queue_index( + struct netdev_rx_queue *queue) +{ + struct net_device *dev = queue->dev; + int index = queue - dev->_rx; + + BUG_ON(index >= dev->num_rx_queues); + return index; +} +#endif + #define DEFAULT_MAX_NUM_RSS_QUEUES (8) int netif_get_num_default_rss_queues(void); |