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Subject[PATCH 5/6] DCB: Add support for DCB BCN
Date
From: Alexander Duyck <alexander.h.duyck@intel.com>

Adds an interface to configure the Backward Congestion Notification (BCN) feature. In a BCN capabale network, congestion notifications from congested points out in the network can cause the end station limit the rate of a given traffic flow.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
---
drivers/net/ixgbe/ixgbe_dcb.h | 28 ++++++
drivers/net/ixgbe/ixgbe_dcb_nl.c | 176 ++++++++++++++++++++++++++++++++++++++
include/linux/dcbnl.h | 44 +++++++++-
include/net/dcbnl.h | 4 +
net/dcb/dcbnl.c | 174 ++++++++++++++++++++++++++++++++++++--
5 files changed, 416 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe_dcb.h b/drivers/net/ixgbe/ixgbe_dcb.h
index bc05c63..75f6efe 100644
--- a/drivers/net/ixgbe/ixgbe_dcb.h
+++ b/drivers/net/ixgbe/ixgbe_dcb.h
@@ -108,7 +108,34 @@ enum dcb_rx_pba_cfg {
pba_80_48 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */
};

+/*
+ * This structure contains many values encoded as fixed-point
+ * numbers, meaning that some of bits are dedicated to the
+ * magnitude and others to the fraction part. In the comments
+ * this is shown as f=n, where n is the number of fraction bits.
+ * These fraction bits are always the low-order bits. The size
+ * of the magnitude is not specified.
+ */
+struct bcn_config {
+ u32 rp_admin_mode[MAX_TRAFFIC_CLASS]; /* BCN enabled, per TC */
+ u32 bcna_option[2]; /* BCNA Port + MAC Addr */
+ u32 rp_w; /* Derivative Weight, f=3 */
+ u32 rp_gi; /* Increase Gain, f=12 */
+ u32 rp_gd; /* Decrease Gain, f=12 */
+ u32 rp_ru; /* Rate Unit */
+ u32 rp_alpha; /* Max Decrease Factor, f=12 */
+ u32 rp_beta; /* Max Increase Factor, f=12 */
+ u32 rp_ri; /* Initial Rate */
+ u32 rp_td; /* Drift Interval Timer */
+ u32 rp_rd; /* Drift Increase */
+ u32 rp_tmax; /* Severe Congestion Backoff Timer Range */
+ u32 rp_rmin; /* Severe Congestion Restart Rate */
+ u32 rp_wrtt; /* RTT Moving Average Weight */
+};
+
struct ixgbe_dcb_config {
+ struct bcn_config bcn;
+
struct tc_configuration tc_config[MAX_TRAFFIC_CLASS];
u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */

@@ -120,7 +147,6 @@ struct ixgbe_dcb_config {
u32 link_speed; /* For bandwidth allocation validation purpose */
};

-
/* DCB driver APIs */

/* DCB rule checking function.*/
diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index b750323..51d162d 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -34,6 +34,7 @@
#define BIT_PFC 0x02
#define BIT_PG_RX 0x04
#define BIT_PG_TX 0x08
+#define BIT_BCN 0x10

int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
struct ixgbe_dcb_config *dst_dcb_cfg, int tc_max)
@@ -88,6 +89,23 @@ int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
src_dcb_cfg->tc_config[i - DCB_PFC_UP_ATTR_0].dcb_pfc;
}

+ for (i = DCB_BCN_ATTR_RP_0; i < DCB_BCN_ATTR_RP_ALL; i++) {
+ dst_dcb_cfg->bcn.rp_admin_mode[i - DCB_BCN_ATTR_RP_0] =
+ src_dcb_cfg->bcn.rp_admin_mode[i - DCB_BCN_ATTR_RP_0];
+ }
+ dst_dcb_cfg->bcn.rp_alpha = src_dcb_cfg->bcn.rp_alpha;
+ dst_dcb_cfg->bcn.rp_beta = src_dcb_cfg->bcn.rp_beta;
+ dst_dcb_cfg->bcn.rp_gd = src_dcb_cfg->bcn.rp_gd;
+ dst_dcb_cfg->bcn.rp_gi = src_dcb_cfg->bcn.rp_gi;
+ dst_dcb_cfg->bcn.rp_tmax = src_dcb_cfg->bcn.rp_tmax;
+ dst_dcb_cfg->bcn.rp_td = src_dcb_cfg->bcn.rp_td;
+ dst_dcb_cfg->bcn.rp_rmin = src_dcb_cfg->bcn.rp_rmin;
+ dst_dcb_cfg->bcn.rp_w = src_dcb_cfg->bcn.rp_w;
+ dst_dcb_cfg->bcn.rp_rd = src_dcb_cfg->bcn.rp_rd;
+ dst_dcb_cfg->bcn.rp_ru = src_dcb_cfg->bcn.rp_ru;
+ dst_dcb_cfg->bcn.rp_wrtt = src_dcb_cfg->bcn.rp_wrtt;
+ dst_dcb_cfg->bcn.rp_ri = src_dcb_cfg->bcn.rp_ri;
+
return 0;
}

@@ -313,6 +331,7 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
struct ixgbe_adapter *adapter = netdev_priv(netdev);
int ret;

+ adapter->dcb_set_bitmap &= ~BIT_BCN; /* no set for BCN */
if (!adapter->dcb_set_bitmap)
return 1;

@@ -413,6 +432,157 @@ static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
return;
}

+static void ixgbe_dcbnl_getbcnrp(struct net_device *netdev, int priority,
+ u8 *setting)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(netdev);
+
+ *setting = adapter->dcb_cfg.bcn.rp_admin_mode[priority];
+}
+
+
+static void ixgbe_dcbnl_getbcncfg(struct net_device *netdev, int enum_index,
+ u32 *setting)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(netdev);
+
+ switch (enum_index) {
+ case DCB_BCN_ATTR_ALPHA:
+ *setting = adapter->dcb_cfg.bcn.rp_alpha;
+ break;
+ case DCB_BCN_ATTR_BETA:
+ *setting = adapter->dcb_cfg.bcn.rp_beta;
+ break;
+ case DCB_BCN_ATTR_GD:
+ *setting = adapter->dcb_cfg.bcn.rp_gd;
+ break;
+ case DCB_BCN_ATTR_GI:
+ *setting = adapter->dcb_cfg.bcn.rp_gi;
+ break;
+ case DCB_BCN_ATTR_TMAX:
+ *setting = adapter->dcb_cfg.bcn.rp_tmax;
+ break;
+ case DCB_BCN_ATTR_TD:
+ *setting = adapter->dcb_cfg.bcn.rp_td;
+ break;
+ case DCB_BCN_ATTR_RMIN:
+ *setting = adapter->dcb_cfg.bcn.rp_rmin;
+ break;
+ case DCB_BCN_ATTR_W:
+ *setting = adapter->dcb_cfg.bcn.rp_w;
+ break;
+ case DCB_BCN_ATTR_RD:
+ *setting = adapter->dcb_cfg.bcn.rp_rd;
+ break;
+ case DCB_BCN_ATTR_RU:
+ *setting = adapter->dcb_cfg.bcn.rp_ru;
+ break;
+ case DCB_BCN_ATTR_WRTT:
+ *setting = adapter->dcb_cfg.bcn.rp_wrtt;
+ break;
+ case DCB_BCN_ATTR_RI:
+ *setting = adapter->dcb_cfg.bcn.rp_ri;
+ break;
+ default:
+ *setting = -1;
+ }
+}
+
+static void ixgbe_dcbnl_setbcnrp(struct net_device *netdev, int priority,
+ u8 setting)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(netdev);
+
+ adapter->temp_dcb_cfg.bcn.rp_admin_mode[priority] = setting;
+
+ if (adapter->temp_dcb_cfg.bcn.rp_admin_mode[priority] !=
+ adapter->dcb_cfg.bcn.rp_admin_mode[priority])
+ adapter->dcb_set_bitmap |= BIT_BCN;
+}
+
+static void ixgbe_dcbnl_setbcncfg(struct net_device *netdev, int enum_index,
+ u32 setting)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(netdev);
+
+ switch (enum_index) {
+ case DCB_BCN_ATTR_ALPHA:
+ adapter->temp_dcb_cfg.bcn.rp_alpha = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_alpha !=
+ adapter->dcb_cfg.bcn.rp_alpha)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_BETA:
+ adapter->temp_dcb_cfg.bcn.rp_beta = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_beta !=
+ adapter->dcb_cfg.bcn.rp_beta)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_GD:
+ adapter->temp_dcb_cfg.bcn.rp_gd = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_gd !=
+ adapter->dcb_cfg.bcn.rp_gd)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_GI:
+ adapter->temp_dcb_cfg.bcn.rp_gi = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_gi !=
+ adapter->dcb_cfg.bcn.rp_gi)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_TMAX:
+ adapter->temp_dcb_cfg.bcn.rp_tmax = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_tmax !=
+ adapter->dcb_cfg.bcn.rp_tmax)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_TD:
+ adapter->temp_dcb_cfg.bcn.rp_td = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_td !=
+ adapter->dcb_cfg.bcn.rp_td)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_RMIN:
+ adapter->temp_dcb_cfg.bcn.rp_rmin = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_rmin !=
+ adapter->dcb_cfg.bcn.rp_rmin)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_W:
+ adapter->temp_dcb_cfg.bcn.rp_w = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_w !=
+ adapter->dcb_cfg.bcn.rp_w)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_RD:
+ adapter->temp_dcb_cfg.bcn.rp_rd = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_rd !=
+ adapter->dcb_cfg.bcn.rp_rd)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_RU:
+ adapter->temp_dcb_cfg.bcn.rp_ru = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_ru !=
+ adapter->dcb_cfg.bcn.rp_ru)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_WRTT:
+ adapter->temp_dcb_cfg.bcn.rp_wrtt = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_wrtt !=
+ adapter->dcb_cfg.bcn.rp_wrtt)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ case DCB_BCN_ATTR_RI:
+ adapter->temp_dcb_cfg.bcn.rp_ri = setting;
+ if (adapter->temp_dcb_cfg.bcn.rp_ri !=
+ adapter->dcb_cfg.bcn.rp_ri)
+ adapter->dcb_set_bitmap |= BIT_BCN;
+ break;
+ default:
+ break;
+ }
+}
+
struct dcbnl_rtnl_ops dcbnl_ops = {
.getstate = ixgbe_dcbnl_get_state,
.setstate = ixgbe_dcbnl_set_state,
@@ -432,6 +602,10 @@ struct dcbnl_rtnl_ops dcbnl_ops = {
.getnumtcs = ixgbe_dcbnl_getnumtcs,
.setnumtcs = ixgbe_dcbnl_setnumtcs,
.getpfcstate = ixgbe_dcbnl_getpfcstate,
- .setpfcstate = ixgbe_dcbnl_setpfcstate
+ .setpfcstate = ixgbe_dcbnl_setpfcstate,
+ .getbcncfg = ixgbe_dcbnl_getbcncfg,
+ .getbcnrp = ixgbe_dcbnl_getbcnrp,
+ .setbcncfg = ixgbe_dcbnl_setbcncfg,
+ .setbcnrp = ixgbe_dcbnl_setbcnrp
};

diff --git a/include/linux/dcbnl.h b/include/linux/dcbnl.h
index 6cc4560..e73a614 100644
--- a/include/linux/dcbnl.h
+++ b/include/linux/dcbnl.h
@@ -46,6 +46,8 @@ struct dcbmsg {
* @DCB_CMD_GCAP: request the DCB capabilities of the device
* @DCB_CMD_GNUMTCS: get the number of traffic classes currently supported
* @DCB_CMD_SNUMTCS: set the number of traffic classes
+ * @DCB_CMD_GBCN: set backward congestion notification configuration
+ * @DCB_CMD_SBCN: get backward congestion notification configration.
*/
enum dcbnl_commands {
DCB_CMD_UNDEFINED,
@@ -62,18 +64,24 @@ enum dcbnl_commands {
DCB_CMD_PFC_SCFG,

DCB_CMD_SET_ALL,
+
DCB_CMD_GPERM_HWADDR,
+
DCB_CMD_GCAP,
+
DCB_CMD_GNUMTCS,
DCB_CMD_SNUMTCS,
+
DCB_CMD_PFC_GSTATE,
DCB_CMD_PFC_SSTATE,

+ DCB_CMD_BCN_GCFG,
+ DCB_CMD_BCN_SCFG,
+
__DCB_CMD_ENUM_MAX,
DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
};

-
/**
* enum dcbnl_attrs - DCB top-level netlink attributes
*
@@ -88,6 +96,7 @@ enum dcbnl_commands {
* @DCB_ATTR_PERM_HWADDR: MAC address of the physical device (NLA_NESTED)
* @DCB_ATTR_CAP: DCB capabilities of the device (NLA_NESTED)
* @DCB_ATTR_NUMTCS: number of traffic classes supported (NLA_NESTED)
+ * @DCB_ATTR_BCN: backward congestion notification configuration (NLA_NESTED)
*/
enum dcbnl_attrs {
DCB_ATTR_UNDEFINED,
@@ -102,6 +111,7 @@ enum dcbnl_attrs {
DCB_ATTR_PERM_HWADDR,
DCB_ATTR_CAP,
DCB_ATTR_NUMTCS,
+ DCB_ATTR_BCN,

__DCB_ATTR_ENUM_MAX,
DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1,
@@ -282,6 +292,38 @@ enum dcbnl_numtcs_attrs {
DCB_NUMTCS_ATTR_MAX = __DCB_NUMTCS_ATTR_ENUM_MAX - 1,
};

+enum dcbnl_bcn_attrs{
+ DCB_BCN_ATTR_UNDEFINED = 0,
+
+ DCB_BCN_ATTR_RP_0,
+ DCB_BCN_ATTR_RP_1,
+ DCB_BCN_ATTR_RP_2,
+ DCB_BCN_ATTR_RP_3,
+ DCB_BCN_ATTR_RP_4,
+ DCB_BCN_ATTR_RP_5,
+ DCB_BCN_ATTR_RP_6,
+ DCB_BCN_ATTR_RP_7,
+ DCB_BCN_ATTR_RP_ALL,
+
+ DCB_BCN_ATTR_ALPHA,
+ DCB_BCN_ATTR_BETA,
+ DCB_BCN_ATTR_GD,
+ DCB_BCN_ATTR_GI,
+ DCB_BCN_ATTR_TMAX,
+ DCB_BCN_ATTR_TD,
+ DCB_BCN_ATTR_RMIN,
+ DCB_BCN_ATTR_W,
+ DCB_BCN_ATTR_RD,
+ DCB_BCN_ATTR_RU,
+ DCB_BCN_ATTR_WRTT,
+ DCB_BCN_ATTR_RI,
+ DCB_BCN_ATTR_C,
+ DCB_BCN_ATTR_ALL,
+
+ __DCB_BCN_ATTR_ENUM_MAX,
+ DCB_BCN_ATTR_MAX = __DCB_BCN_ATTR_ENUM_MAX - 1,
+};
+
/**
* enum dcb_general_attr_values - general DCB attribute values
*
diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index c7d87ca..91e0a3d 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -44,6 +44,10 @@ struct dcbnl_rtnl_ops {
u8 (*setnumtcs)(struct net_device *, int, u8);
u8 (*getpfcstate)(struct net_device *);
void (*setpfcstate)(struct net_device *, u8);
+ void (*getbcncfg)(struct net_device *, int, u32 *);
+ void (*setbcncfg)(struct net_device *, int, u32);
+ void (*getbcnrp)(struct net_device *, int, u8 *);
+ void (*setbcnrp)(struct net_device *, int, u8);
};

#endif /* __NET_DCBNL_H__ */
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 8c21a00..a8e0c79 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -55,14 +55,15 @@ MODULE_LICENSE("GPL");

/* DCB netlink attributes policy */
static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
- [DCB_ATTR_IFNAME] = {.type = NLA_STRING, .len = IFNAMSIZ - 1},
- [DCB_ATTR_STATE] = {.type = NLA_U8},
- [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
- [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
- [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
+ [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
+ [DCB_ATTR_STATE] = {.type = NLA_U8},
+ [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
+ [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
+ [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
[DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
- [DCB_ATTR_CAP] = {.type = NLA_NESTED},
- [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
+ [DCB_ATTR_CAP] = {.type = NLA_NESTED},
+ [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
+ [DCB_ATTR_BCN] = {.type = NLA_NESTED},
};

/* DCB priority flow control to User Priority nested attributes */
@@ -128,6 +129,33 @@ static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
[DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
};

+/* DCB BCN nested attributes. */
+static struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
+ [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8},
+ [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG},
+ [DCB_BCN_ATTR_ALPHA] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_BETA] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_GD] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_GI] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_TMAX] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_TD] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_RMIN] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_W] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_RD] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_RU] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_WRTT] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_RI] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_C] = {.type = NLA_U32},
+ [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG},
+};
+
/* standard netlink reply call */
static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
u32 seq, u16 flags)
@@ -847,6 +875,130 @@ static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
}

+static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
+ u32 pid, u32 seq, u16 flags)
+{
+ struct sk_buff *dcbnl_skb;
+ struct nlmsghdr *nlh;
+ struct dcbmsg *dcb;
+ struct nlattr *bcn_nest;
+ struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
+ u8 value_byte;
+ u32 value_integer;
+ int ret = -EINVAL;
+ bool getall = false;
+ int i;
+
+ if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
+ !netdev->dcbnl_ops->getbcncfg)
+ return ret;
+
+ ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
+ tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
+
+ if (ret)
+ goto err_out;
+
+ dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!dcbnl_skb)
+ goto err_out;
+
+ nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
+
+ dcb = NLMSG_DATA(nlh);
+ dcb->dcb_family = AF_UNSPEC;
+ dcb->cmd = DCB_CMD_BCN_GCFG;
+
+ bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
+ if (!bcn_nest)
+ goto err;
+
+ if (bcn_tb[DCB_BCN_ATTR_ALL])
+ getall = true;
+
+ for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
+ if (!getall && !bcn_tb[i])
+ continue;
+
+ netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
+ &value_byte);
+ ret = nla_put_u8(dcbnl_skb, i, value_byte);
+ if (ret)
+ goto err_bcn;
+ }
+
+ for (i = DCB_BCN_ATTR_ALPHA; i <= DCB_BCN_ATTR_RI; i++) {
+ if (!getall && !bcn_tb[i])
+ continue;
+
+ netdev->dcbnl_ops->getbcncfg(netdev, i,
+ &value_integer);
+ ret = nla_put_u32(dcbnl_skb, i, value_integer);
+ if (ret)
+ goto err_bcn;
+ }
+
+ nla_nest_end(dcbnl_skb, bcn_nest);
+
+ nlmsg_end(dcbnl_skb, nlh);
+
+ ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err_bcn:
+ nla_nest_cancel(dcbnl_skb, bcn_nest);
+nlmsg_failure:
+err:
+ kfree(dcbnl_skb);
+err_out:
+ ret = -EINVAL;
+ return ret;
+}
+
+static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
+ u32 pid, u32 seq, u16 flags)
+{
+ struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
+ int i;
+ int ret = -EINVAL;
+ u8 value_byte;
+ u32 value_int;
+
+ if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg
+ || !netdev->dcbnl_ops->setbcnrp)
+ return ret;
+
+ ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
+ tb[DCB_ATTR_BCN],
+ dcbnl_pfc_up_nest);
+ if (ret)
+ goto err;
+
+ for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
+ if (data[i] == NULL)
+ continue;
+ value_byte = nla_get_u8(data[i]);
+ netdev->dcbnl_ops->setbcnrp(netdev,
+ data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
+ }
+
+ for (i = DCB_BCN_ATTR_ALPHA; i <= DCB_BCN_ATTR_RI; i++) {
+ if (data[i] == NULL)
+ continue;
+ value_int = nla_get_u32(data[i]);
+ netdev->dcbnl_ops->setbcncfg(netdev,
+ i, value_int);
+ }
+
+ ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
+ pid, seq, flags);
+err:
+ return ret;
+}
+
static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct net *net = sock_net(skb->sk);
@@ -895,6 +1047,10 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags);
goto out;
+ case DCB_CMD_BCN_GCFG:
+ ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
+ nlh->nlmsg_flags);
+ goto out;
case DCB_CMD_SSTATE:
ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags);
@@ -936,6 +1092,10 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags);
goto out;
+ case DCB_CMD_BCN_SCFG:
+ ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
+ nlh->nlmsg_flags);
+ goto out;
default:
goto errout;
}


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  Last update: 2008-10-14 21:59    [from the cache]
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