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DCB: Add support for DCB BCN

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2008-11-20 21:10:23 -08:00 committed by David S. Miller
parent 0eb3aa9bab
commit 859ee3c438
5 changed files with 416 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/net/ixgbe/ixgbe_dcb.h
View File

@ -108,7 +108,34 @@ enum dcb_rx_pba_cfg {
pba_80_48 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */ 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 ixgbe_dcb_config {
struct bcn_config bcn;
struct tc_configuration tc_config[MAX_TRAFFIC_CLASS]; struct tc_configuration tc_config[MAX_TRAFFIC_CLASS];
u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */ u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */

176
drivers/net/ixgbe/ixgbe_dcb_nl.c
View File

@ -34,6 +34,7 @@
#define BIT_PFC 0x02 #define BIT_PFC 0x02
#define BIT_PG_RX 0x04 #define BIT_PG_RX 0x04
#define BIT_PG_TX 0x08 #define BIT_PG_TX 0x08
#define BIT_BCN 0x10
int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg, int ixgbe_copy_dcb_cfg(struct ixgbe_dcb_config *src_dcb_cfg,
struct ixgbe_dcb_config *dst_dcb_cfg, int tc_max) 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; 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; return 0;
} }
@ -313,6 +331,7 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_adapter *adapter = netdev_priv(netdev);
int ret; int ret;
adapter->dcb_set_bitmap &= ~BIT_BCN; /* no set for BCN */
if (!adapter->dcb_set_bitmap) if (!adapter->dcb_set_bitmap)
return 1; return 1;
@ -417,6 +436,157 @@ static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
return; 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 = { struct dcbnl_rtnl_ops dcbnl_ops = {
.getstate = ixgbe_dcbnl_get_state, .getstate = ixgbe_dcbnl_get_state,
.setstate = ixgbe_dcbnl_set_state, .setstate = ixgbe_dcbnl_set_state,
@ -436,6 +606,10 @@ struct dcbnl_rtnl_ops dcbnl_ops = {
.getnumtcs = ixgbe_dcbnl_getnumtcs, .getnumtcs = ixgbe_dcbnl_getnumtcs,
.setnumtcs = ixgbe_dcbnl_setnumtcs, .setnumtcs = ixgbe_dcbnl_setnumtcs,
.getpfcstate = ixgbe_dcbnl_getpfcstate, .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
}; };

44
include/linux/dcbnl.h
View File

@ -46,6 +46,8 @@ struct dcbmsg {
* @DCB_CMD_GCAP: request the DCB capabilities of the device * @DCB_CMD_GCAP: request the DCB capabilities of the device
* @DCB_CMD_GNUMTCS: get the number of traffic classes currently supported * @DCB_CMD_GNUMTCS: get the number of traffic classes currently supported
* @DCB_CMD_SNUMTCS: set the number of traffic classes * @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 { enum dcbnl_commands {
DCB_CMD_UNDEFINED, DCB_CMD_UNDEFINED,
@ -62,18 +64,24 @@ enum dcbnl_commands {
DCB_CMD_PFC_SCFG, DCB_CMD_PFC_SCFG,
DCB_CMD_SET_ALL, DCB_CMD_SET_ALL,
DCB_CMD_GPERM_HWADDR, DCB_CMD_GPERM_HWADDR,
DCB_CMD_GCAP, DCB_CMD_GCAP,
DCB_CMD_GNUMTCS, DCB_CMD_GNUMTCS,
DCB_CMD_SNUMTCS, DCB_CMD_SNUMTCS,
DCB_CMD_PFC_GSTATE, DCB_CMD_PFC_GSTATE,
DCB_CMD_PFC_SSTATE, DCB_CMD_PFC_SSTATE,
DCB_CMD_BCN_GCFG,
DCB_CMD_BCN_SCFG,
__DCB_CMD_ENUM_MAX, __DCB_CMD_ENUM_MAX,
DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1, DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
}; };
/** /**
* enum dcbnl_attrs - DCB top-level netlink attributes * 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_PERM_HWADDR: MAC address of the physical device (NLA_NESTED)
* @DCB_ATTR_CAP: DCB capabilities of the 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_NUMTCS: number of traffic classes supported (NLA_NESTED)
* @DCB_ATTR_BCN: backward congestion notification configuration (NLA_NESTED)
*/ */
enum dcbnl_attrs { enum dcbnl_attrs {
DCB_ATTR_UNDEFINED, DCB_ATTR_UNDEFINED,
@ -102,6 +111,7 @@ enum dcbnl_attrs {
DCB_ATTR_PERM_HWADDR, DCB_ATTR_PERM_HWADDR,
DCB_ATTR_CAP, DCB_ATTR_CAP,
DCB_ATTR_NUMTCS, DCB_ATTR_NUMTCS,
DCB_ATTR_BCN,
__DCB_ATTR_ENUM_MAX, __DCB_ATTR_ENUM_MAX,
DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1, 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, 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 * enum dcb_general_attr_values - general DCB attribute values
* *

4
include/net/dcbnl.h
View File

@ -44,6 +44,10 @@ struct dcbnl_rtnl_ops {
u8 (*setnumtcs)(struct net_device *, int, u8); u8 (*setnumtcs)(struct net_device *, int, u8);
u8 (*getpfcstate)(struct net_device *); u8 (*getpfcstate)(struct net_device *);
void (*setpfcstate)(struct net_device *, u8); 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__ */ #endif /* __NET_DCBNL_H__ */

174
net/dcb/dcbnl.c
View File

@ -55,14 +55,15 @@ MODULE_LICENSE("GPL");
/* DCB netlink attributes policy */ /* DCB netlink attributes policy */
static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = { static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
[DCB_ATTR_IFNAME] = {.type = NLA_STRING, .len = IFNAMSIZ - 1}, [DCB_ATTR_IFNAME] = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
[DCB_ATTR_STATE] = {.type = NLA_U8}, [DCB_ATTR_STATE] = {.type = NLA_U8},
[DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED}, [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
[DCB_ATTR_PG_CFG] = {.type = NLA_NESTED}, [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
[DCB_ATTR_SET_ALL] = {.type = NLA_U8}, [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
[DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG}, [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
[DCB_ATTR_CAP] = {.type = NLA_NESTED}, [DCB_ATTR_CAP] = {.type = NLA_NESTED},
[DCB_ATTR_PFC_STATE] = {.type = NLA_U8}, [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
[DCB_ATTR_BCN] = {.type = NLA_NESTED},
}; };
/* DCB priority flow control to User Priority nested attributes */ /* 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_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 */ /* standard netlink reply call */
static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid, static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
u32 seq, u16 flags) 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); 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) static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{ {
struct net *net = sock_net(skb->sk); 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, ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags); nlh->nlmsg_flags);
goto out; 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: case DCB_CMD_SSTATE:
ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq, ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags); 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, ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags); nlh->nlmsg_flags);
goto out; goto out;
case DCB_CMD_BCN_SCFG:
ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
nlh->nlmsg_flags);
goto out;
default: default:
goto errout; goto errout;
} }