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dcbnl: add support for ieee8021Qaz attributes
The IEEE8021Qaz is the IEEE standard version of CEE. The standard has had enough significant changes from the CEE version that many of the CEE attributes have no meaning in the new spec or do not easily map to IEEE standards. Rather then attempt to create a complicated mapping between CEE and IEEE standards this patch adds a nested IEEE attribute to the list of DCB attributes. The policy is, [DCB_ATTR_IFNAME] [DCB_ATTR_STATE] ... [DCB_ATTR_IEEE] [DCB_ATTR_IEEE_ETS] [DCB_ATTR_IEEE_PFC] [DCB_ATTR_IEEE_APP_TABLE] [DCB_ATTR_IEEE_APP] ... The following dcbnl_rtnl_ops routines were added to handle the IEEE standard, int (*ieee_getets) (struct net_device *, struct ieee_ets *); int (*ieee_setets) (struct net_device *, struct ieee_ets *); int (*ieee_getpfc) (struct net_device *, struct ieee_pfc *); int (*ieee_setpfc) (struct net_device *, struct ieee_pfc *); int (*ieee_getapp) (struct net_device *, struct dcb_app *); int (*ieee_setapp) (struct net_device *, struct dcb_app *); Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Fastabend
David S. Miller
parent
a7dd6027e5
commit
3e29027af4
@ -22,6 +22,87 @@
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#include <linux/types.h>
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/* IEEE 802.1Qaz std supported values */
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#define IEEE_8021QAZ_MAX_TCS 8
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/* This structure contains the IEEE 802.1Qaz ETS managed object
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*
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* @willing: willing bit in ETS configuratin TLV
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* @ets_cap: indicates supported capacity of ets feature
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* @cbs: credit based shaper ets algorithm supported
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* @tc_tx_bw: tc tx bandwidth indexed by traffic class
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* @tc_rx_bw: tc rx bandwidth indexed by traffic class
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* @tc_tsa: TSA Assignment table, indexed by traffic class
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* @prio_tc: priority assignment table mapping 8021Qp to traffic class
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* @tc_reco_bw: recommended tc bandwidth indexed by traffic class for TLV
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* @tc_reco_tsa: recommended tc bandwidth indexed by traffic class for TLV
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* @reco_prio_tc: recommended tc tx bandwidth indexed by traffic class for TLV
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*
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* Recommended values are used to set fields in the ETS recommendation TLV
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* with hardware offloaded LLDP.
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*
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* ----
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* TSA Assignment 8 bit identifiers
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* 0 strict priority
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* 1 credit-based shaper
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* 2 enhanced transmission selection
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* 3-254 reserved
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* 255 vendor specific
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*/
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struct ieee_ets {
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__u8 willing;
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__u8 ets_cap;
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__u8 cbs;
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__u8 tc_tx_bw[IEEE_8021QAZ_MAX_TCS];
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__u8 tc_rx_bw[IEEE_8021QAZ_MAX_TCS];
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__u8 tc_tsa[IEEE_8021QAZ_MAX_TCS];
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__u8 prio_tc[IEEE_8021QAZ_MAX_TCS];
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__u8 tc_reco_bw[IEEE_8021QAZ_MAX_TCS];
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__u8 tc_reco_tsa[IEEE_8021QAZ_MAX_TCS];
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__u8 reco_prio_tc[IEEE_8021QAZ_MAX_TCS];
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};
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/* This structure contains the IEEE 802.1Qaz PFC managed object
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*
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* @pfc_cap: Indicates the number of traffic classes on the local device
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* that may simultaneously have PFC enabled.
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* @pfc_en: bitmap indicating pfc enabled traffic classes
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* @mbc: enable macsec bypass capability
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* @delay: the allowance made for a round-trip propagation delay of the
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* link in bits.
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* @requests: count of the sent pfc frames
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* @indications: count of the received pfc frames
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*/
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struct ieee_pfc {
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__u8 pfc_cap;
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__u8 pfc_en;
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__u8 mbc;
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__u16 delay;
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__u64 requests[IEEE_8021QAZ_MAX_TCS];
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__u64 indications[IEEE_8021QAZ_MAX_TCS];
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};
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/* This structure contains the IEEE 802.1Qaz APP managed object
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*
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* @selector: protocol identifier type
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* @protocol: protocol of type indicated
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* @priority: 3-bit unsigned integer indicating priority
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*
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* ----
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* Selector field values
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* 0 Reserved
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* 1 Ethertype
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* 2 Well known port number over TCP or SCTP
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* 3 Well known port number over UDP or DCCP
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* 4 Well known port number over TCP, SCTP, UDP, or DCCP
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* 5-7 Reserved
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*/
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struct dcb_app {
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__u8 selector;
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__u32 protocol;
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__u8 priority;
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};
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struct dcbmsg {
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__u8 dcb_family;
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__u8 cmd;
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@ -50,6 +131,8 @@ struct dcbmsg {
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* @DCB_CMD_SBCN: get backward congestion notification configration.
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* @DCB_CMD_GAPP: get application protocol configuration
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* @DCB_CMD_SAPP: set application protocol configuration
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* @DCB_CMD_IEEE_SET: set IEEE 802.1Qaz configuration
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* @DCB_CMD_IEEE_GET: get IEEE 802.1Qaz configuration
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*/
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enum dcbnl_commands {
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DCB_CMD_UNDEFINED,
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@ -83,6 +166,9 @@ enum dcbnl_commands {
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DCB_CMD_GAPP,
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DCB_CMD_SAPP,
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DCB_CMD_IEEE_SET,
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DCB_CMD_IEEE_GET,
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__DCB_CMD_ENUM_MAX,
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DCB_CMD_MAX = __DCB_CMD_ENUM_MAX - 1,
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};
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@ -102,6 +188,7 @@ enum dcbnl_commands {
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* @DCB_ATTR_CAP: DCB capabilities of the device (NLA_NESTED)
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* @DCB_ATTR_NUMTCS: number of traffic classes supported (NLA_NESTED)
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* @DCB_ATTR_BCN: backward congestion notification configuration (NLA_NESTED)
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* @DCB_ATTR_IEEE: IEEE 802.1Qaz supported attributes (NLA_NESTED)
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*/
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enum dcbnl_attrs {
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DCB_ATTR_UNDEFINED,
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@ -119,10 +206,29 @@ enum dcbnl_attrs {
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DCB_ATTR_BCN,
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DCB_ATTR_APP,
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/* IEEE std attributes */
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DCB_ATTR_IEEE,
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__DCB_ATTR_ENUM_MAX,
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DCB_ATTR_MAX = __DCB_ATTR_ENUM_MAX - 1,
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};
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enum ieee_attrs {
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DCB_ATTR_IEEE_UNSPEC,
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DCB_ATTR_IEEE_ETS,
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DCB_ATTR_IEEE_PFC,
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DCB_ATTR_IEEE_APP_TABLE,
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__DCB_ATTR_IEEE_MAX
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};
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#define DCB_ATTR_IEEE_MAX (__DCB_ATTR_IEEE_MAX - 1)
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enum ieee_attrs_app {
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DCB_ATTR_IEEE_APP_UNSPEC,
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DCB_ATTR_IEEE_APP,
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__DCB_ATTR_IEEE_APP_MAX
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};
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#define DCB_ATTR_IEEE_APP_MAX (__DCB_ATTR_IEEE_APP_MAX - 1)
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/**
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* enum dcbnl_pfc_attrs - DCB Priority Flow Control user priority nested attrs
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*
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@ -20,11 +20,22 @@
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#ifndef __NET_DCBNL_H__
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#define __NET_DCBNL_H__
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#include <linux/dcbnl.h>
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/*
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* Ops struct for the netlink callbacks. Used by DCB-enabled drivers through
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* the netdevice struct.
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*/
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struct dcbnl_rtnl_ops {
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/* IEEE 802.1Qaz std */
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int (*ieee_getets) (struct net_device *, struct ieee_ets *);
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int (*ieee_setets) (struct net_device *, struct ieee_ets *);
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int (*ieee_getpfc) (struct net_device *, struct ieee_pfc *);
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int (*ieee_setpfc) (struct net_device *, struct ieee_pfc *);
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int (*ieee_getapp) (struct net_device *, struct dcb_app *);
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int (*ieee_setapp) (struct net_device *, struct dcb_app *);
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/* CEE std */
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u8 (*getstate)(struct net_device *);
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u8 (*setstate)(struct net_device *, u8);
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void (*getpermhwaddr)(struct net_device *, u8 *);
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131
net/dcb/dcbnl.c
131
net/dcb/dcbnl.c
@ -66,6 +66,7 @@ static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
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[DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
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[DCB_ATTR_BCN] = {.type = NLA_NESTED},
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[DCB_ATTR_APP] = {.type = NLA_NESTED},
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[DCB_ATTR_IEEE] = {.type = NLA_NESTED},
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};
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/* DCB priority flow control to User Priority nested attributes */
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@ -167,6 +168,17 @@ static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
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[DCB_APP_ATTR_PRIORITY] = {.type = NLA_U8},
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};
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/* IEEE 802.1Qaz nested attributes. */
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static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
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[DCB_ATTR_IEEE_ETS] = {.len = sizeof(struct ieee_ets)},
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[DCB_ATTR_IEEE_PFC] = {.len = sizeof(struct ieee_pfc)},
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[DCB_ATTR_IEEE_APP_TABLE] = {.type = NLA_NESTED},
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};
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static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
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[DCB_ATTR_IEEE_APP] = {.len = sizeof(struct dcb_app)},
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};
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/* standard netlink reply call */
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static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
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u32 seq, u16 flags)
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@ -1118,6 +1130,117 @@ err:
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return ret;
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}
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/* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
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* be completed the entire msg is aborted and error value is returned.
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* No attempt is made to reconcile the case where only part of the
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* cmd can be completed.
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*/
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static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
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u32 pid, u32 seq, u16 flags)
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{
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const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
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struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
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int err = -EOPNOTSUPP;
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if (!ops)
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goto err;
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err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
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tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
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if (err)
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goto err;
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if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
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struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
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err = ops->ieee_setets(netdev, ets);
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if (err)
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goto err;
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}
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if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setets) {
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struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
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err = ops->ieee_setpfc(netdev, pfc);
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if (err)
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goto err;
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}
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if (ieee[DCB_ATTR_IEEE_APP_TABLE] && ops->ieee_setapp) {
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struct nlattr *attr;
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int rem;
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nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
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struct dcb_app *app_data;
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if (nla_type(attr) != DCB_ATTR_IEEE_APP)
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continue;
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app_data = nla_data(attr);
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err = ops->ieee_setapp(netdev, app_data);
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if (err)
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goto err;
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}
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}
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err:
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dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
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pid, seq, flags);
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return err;
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}
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/* Handle IEEE 802.1Qaz GET commands. */
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static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
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u32 pid, u32 seq, u16 flags)
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{
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struct sk_buff *skb;
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struct nlmsghdr *nlh;
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struct dcbmsg *dcb;
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struct nlattr *ieee;
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const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
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int err;
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if (!ops)
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return -EOPNOTSUPP;
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skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!skb)
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return -ENOBUFS;
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nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
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dcb = NLMSG_DATA(nlh);
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dcb->dcb_family = AF_UNSPEC;
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dcb->cmd = DCB_CMD_IEEE_GET;
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NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
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ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
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if (!ieee)
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goto nla_put_failure;
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if (ops->ieee_getets) {
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struct ieee_ets ets;
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err = ops->ieee_getets(netdev, &ets);
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if (!err)
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NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
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}
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if (ops->ieee_getpfc) {
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struct ieee_pfc pfc;
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err = ops->ieee_getpfc(netdev, &pfc);
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if (!err)
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NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
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}
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nla_nest_end(skb, ieee);
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nlmsg_end(skb, nlh);
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return rtnl_unicast(skb, &init_net, pid);
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nla_put_failure:
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nlmsg_cancel(skb, nlh);
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nlmsg_failure:
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kfree_skb(skb);
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return -1;
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}
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static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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{
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struct net *net = sock_net(skb->sk);
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@ -1223,6 +1346,14 @@ static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
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nlh->nlmsg_flags);
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goto out;
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case DCB_CMD_IEEE_SET:
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ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
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nlh->nlmsg_flags);
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goto out;
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case DCB_CMD_IEEE_GET:
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ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
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nlh->nlmsg_flags);
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goto out;
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default:
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goto errout;
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}
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