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net/ethtool: introduce a new ioctl for per queue setting 

Introduce a new ioctl ETHTOOL_PERQUEUE for per queue parameters setting.
The following patches will enable some SUB_COMMANDs for per queue
setting.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Reviewed-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kan Liang 2016-02-19 09:24:01 -05:00 committed by David S. Miller
parent 5fd003f56c
commit ac2c7ad0e5
2 changed files with 42 additions and 2 deletions
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17
include/uapi/linux/ethtool.h
View File

@ -1202,6 +1202,21 @@ enum ethtool_sfeatures_retval_bits {
#define ETHTOOL_F_WISH (1 << ETHTOOL_F_WISH__BIT)
#define ETHTOOL_F_COMPAT (1 << ETHTOOL_F_COMPAT__BIT)
#define MAX_NUM_QUEUE 4096
/**
* struct ethtool_per_queue_op - apply sub command to the queues in mask.
* @cmd: ETHTOOL_PERQUEUE
* @sub_command: the sub command which apply to each queues
* @queue_mask: Bitmap of the queues which sub command apply to
* @data: A complete command structure following for each of the queues addressed
*/
struct ethtool_per_queue_op {
__u32 cmd;
__u32 sub_command;
__u32 queue_mask[DIV_ROUND_UP(MAX_NUM_QUEUE, 32)];
char data[];
};
/* CMDs currently supported */
#define ETHTOOL_GSET 0x00000001 /* Get settings. */
@ -1285,6 +1300,8 @@ enum ethtool_sfeatures_retval_bits {
#define ETHTOOL_STUNABLE 0x00000049 /* Set tunable configuration */
#define ETHTOOL_GPHYSTATS 0x0000004a /* get PHY-specific statistics */
#define ETHTOOL_PERQUEUE 0x0000004b /* Set per queue options */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
#define SPARC_ETH_SSET ETHTOOL_SSET

27
net/core/ethtool.c
View File

@ -1888,13 +1888,27 @@ out:
return ret;
}
static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
{
struct ethtool_per_queue_op per_queue_opt;
if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
return -EFAULT;
switch (per_queue_opt.sub_command) {
default:
return -EOPNOTSUPP;
};
}
/* The main entry point in this file. Called from net/core/dev_ioctl.c */
int dev_ethtool(struct net *net, struct ifreq *ifr)
{
struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
void __user *useraddr = ifr->ifr_data;
u32 ethcmd;
u32 ethcmd, sub_cmd;
int rc;
netdev_features_t old_features;
@ -1904,8 +1918,14 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
return -EFAULT;
if (ethcmd == ETHTOOL_PERQUEUE) {
if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
return -EFAULT;
} else {
sub_cmd = ethcmd;
}
/* Allow some commands to be done by anyone */
switch (ethcmd) {
switch (sub_cmd) {
case ETHTOOL_GSET:
case ETHTOOL_GDRVINFO:
case ETHTOOL_GMSGLVL:
@ -2135,6 +2155,9 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GPHYSTATS:
rc = ethtool_get_phy_stats(dev, useraddr);
break;
case ETHTOOL_PERQUEUE:
rc = ethtool_set_per_queue(dev, useraddr);
break;
default:
rc = -EOPNOTSUPP;
}