From: Kan Liang <kan.li...@intel.com>
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.li...@intel.com>
---
Changes since V1:
- Checking the sub-command number to determine whether the command
requires CAP_NET_ADMIN
- Refine the struct ethtool_per_queue_op and improve the comments
include/uapi/linux/ethtool.h | 17 +++++++++++++++++
net/core/ethtool.c | 18 ++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index cd16291..1913d37 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1144,6 +1144,21 @@ 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;
+ unsigned long queue_mask[BITS_TO_LONGS(MAX_NUM_QUEUE)];
+ char data[];
+};
/* CMDs currently supported */
#define ETHTOOL_GSET 0x00000001 /* Get settings. */
@@ -1226,6 +1241,8 @@ enum ethtool_sfeatures_retval_bits {
#define ETHTOOL_GTUNABLE 0x00000048 /* Get tunable configuration */
#define ETHTOOL_STUNABLE 0x00000049 /* Set tunable configuration */
+#define ETHTOOL_PERQUEUE 0x0000004a /* Set per queue options */
+
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
#define SPARC_ETH_SSET ETHTOOL_SSET
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 09948a7..ac45597 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1748,6 +1748,20 @@ 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)
@@ -1799,6 +1813,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GEEE:
case ETHTOOL_GTUNABLE:
break;
+ case ETHTOOL_PERQUEUE:
default:
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
@@ -1991,6 +2006,9 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_STUNABLE:
rc = ethtool_set_tunable(dev, useraddr);
break;
+ case ETHTOOL_PERQUEUE:
+ rc = ethtool_set_per_queue(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}
--
1.8.3.1
--
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