From 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Thu, 20 Nov 2008 21:10:23 -0800 Subject: [PATCH] DCB: Add support for DCB BCN 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 Signed-off-by: Jeff Kirsher Signed-off-by: Peter P Waskiewicz Jr Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe_dcb.h | 27 +++++ 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(+), 9 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_dcb.h b/drivers/net/ixgbe/ixgbe_dcb.h index 62dfd243bedc..75f6efe1e369 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 */ diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c index dd940a8f9357..615c2803202a 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; @@ -417,6 +436,157 @@ 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, @@ -436,6 +606,10 @@ 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 6cc4560bc376..e73a61449ad6 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 c7d87caf3f99..91e0a3d7faf2 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 758419c6f59b..b2bda3f610df 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) @@ -843,6 +871,130 @@ 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); @@ -891,6 +1043,10 @@ 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); @@ -932,6 +1088,10 @@ 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; } -- 2.20.1