From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- net/smc/smc_clc.h | 401 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 401 insertions(+) create mode 100644 net/smc/smc_clc.h (limited to 'net/smc/smc_clc.h') diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h new file mode 100644 index 000000000..5fee545c9 --- /dev/null +++ b/net/smc/smc_clc.h @@ -0,0 +1,401 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Shared Memory Communications over RDMA (SMC-R) and RoCE + * + * CLC (connection layer control) handshake over initial TCP socket to + * prepare for RDMA traffic + * + * Copyright IBM Corp. 2016 + * + * Author(s): Ursula Braun + */ + +#ifndef _SMC_CLC_H +#define _SMC_CLC_H + +#include +#include + +#include "smc.h" +#include "smc_netlink.h" + +#define SMC_CLC_PROPOSAL 0x01 +#define SMC_CLC_ACCEPT 0x02 +#define SMC_CLC_CONFIRM 0x03 +#define SMC_CLC_DECLINE 0x04 + +#define SMC_TYPE_R 0 /* SMC-R only */ +#define SMC_TYPE_D 1 /* SMC-D only */ +#define SMC_TYPE_N 2 /* neither SMC-R nor SMC-D */ +#define SMC_TYPE_B 3 /* SMC-R and SMC-D */ +#define CLC_WAIT_TIME (6 * HZ) /* max. wait time on clcsock */ +#define CLC_WAIT_TIME_SHORT HZ /* short wait time on clcsock */ +#define SMC_CLC_DECL_MEM 0x01010000 /* insufficient memory resources */ +#define SMC_CLC_DECL_TIMEOUT_CL 0x02010000 /* timeout w4 QP confirm link */ +#define SMC_CLC_DECL_TIMEOUT_AL 0x02020000 /* timeout w4 QP add link */ +#define SMC_CLC_DECL_CNFERR 0x03000000 /* configuration error */ +#define SMC_CLC_DECL_PEERNOSMC 0x03010000 /* peer did not indicate SMC */ +#define SMC_CLC_DECL_IPSEC 0x03020000 /* IPsec usage */ +#define SMC_CLC_DECL_NOSMCDEV 0x03030000 /* no SMC device found (R or D) */ +#define SMC_CLC_DECL_NOSMCDDEV 0x03030001 /* no SMC-D device found */ +#define SMC_CLC_DECL_NOSMCRDEV 0x03030002 /* no SMC-R device found */ +#define SMC_CLC_DECL_NOISM2SUPP 0x03030003 /* hardware has no ISMv2 support */ +#define SMC_CLC_DECL_NOV2EXT 0x03030004 /* peer sent no clc v2 extension */ +#define SMC_CLC_DECL_NOV2DEXT 0x03030005 /* peer sent no clc SMC-Dv2 ext. */ +#define SMC_CLC_DECL_NOSEID 0x03030006 /* peer sent no SEID */ +#define SMC_CLC_DECL_NOSMCD2DEV 0x03030007 /* no SMC-Dv2 device found */ +#define SMC_CLC_DECL_NOUEID 0x03030008 /* peer sent no UEID */ +#define SMC_CLC_DECL_MODEUNSUPP 0x03040000 /* smc modes do not match (R or D)*/ +#define SMC_CLC_DECL_RMBE_EC 0x03050000 /* peer has eyecatcher in RMBE */ +#define SMC_CLC_DECL_OPTUNSUPP 0x03060000 /* fastopen sockopt not supported */ +#define SMC_CLC_DECL_DIFFPREFIX 0x03070000 /* IP prefix / subnet mismatch */ +#define SMC_CLC_DECL_GETVLANERR 0x03080000 /* err to get vlan id of ip device*/ +#define SMC_CLC_DECL_ISMVLANERR 0x03090000 /* err to reg vlan id on ism dev */ +#define SMC_CLC_DECL_NOACTLINK 0x030a0000 /* no active smc-r link in lgr */ +#define SMC_CLC_DECL_NOSRVLINK 0x030b0000 /* SMC-R link from srv not found */ +#define SMC_CLC_DECL_VERSMISMAT 0x030c0000 /* SMC version mismatch */ +#define SMC_CLC_DECL_MAX_DMB 0x030d0000 /* SMC-D DMB limit exceeded */ +#define SMC_CLC_DECL_NOROUTE 0x030e0000 /* SMC-Rv2 conn. no route to peer */ +#define SMC_CLC_DECL_NOINDIRECT 0x030f0000 /* SMC-Rv2 conn. indirect mismatch*/ +#define SMC_CLC_DECL_SYNCERR 0x04000000 /* synchronization error */ +#define SMC_CLC_DECL_PEERDECL 0x05000000 /* peer declined during handshake */ +#define SMC_CLC_DECL_INTERR 0x09990000 /* internal error */ +#define SMC_CLC_DECL_ERR_RTOK 0x09990001 /* rtoken handling failed */ +#define SMC_CLC_DECL_ERR_RDYLNK 0x09990002 /* ib ready link failed */ +#define SMC_CLC_DECL_ERR_REGBUF 0x09990003 /* reg rdma bufs failed */ + +#define SMC_FIRST_CONTACT_MASK 0b10 /* first contact bit within typev2 */ + +struct smc_clc_msg_hdr { /* header1 of clc messages */ + u8 eyecatcher[4]; /* eye catcher */ + u8 type; /* proposal / accept / confirm / decline */ + __be16 length; +#if defined(__BIG_ENDIAN_BITFIELD) + u8 version : 4, + typev2 : 2, + typev1 : 2; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + u8 typev1 : 2, + typev2 : 2, + version : 4; +#endif +} __packed; /* format defined in RFC7609 */ + +struct smc_clc_msg_trail { /* trailer of clc messages */ + u8 eyecatcher[4]; +}; + +struct smc_clc_msg_local { /* header2 of clc messages */ + u8 id_for_peer[SMC_SYSTEMID_LEN]; /* unique system id */ + u8 gid[16]; /* gid of ib_device port */ + u8 mac[6]; /* mac of ib_device port */ +}; + +/* Struct would be 4 byte aligned, but it is used in an array that is sent + * to peers and must conform to RFC7609, hence we need to use packed here. + */ +struct smc_clc_ipv6_prefix { + struct in6_addr prefix; + u8 prefix_len; +} __packed; /* format defined in RFC7609 */ + +#if defined(__BIG_ENDIAN_BITFIELD) +struct smc_clc_v2_flag { + u8 release : 4, + rsvd : 3, + seid : 1; +}; +#elif defined(__LITTLE_ENDIAN_BITFIELD) +struct smc_clc_v2_flag { + u8 seid : 1, + rsvd : 3, + release : 4; +}; +#endif + +struct smc_clnt_opts_area_hdr { + u8 eid_cnt; /* number of user defined EIDs */ + u8 ism_gid_cnt; /* number of ISMv2 GIDs */ + u8 reserved1; + struct smc_clc_v2_flag flag; + u8 reserved2[2]; + __be16 smcd_v2_ext_offset; /* SMC-Dv2 Extension Offset */ +}; + +struct smc_clc_smcd_gid_chid { + __be64 gid; /* ISM GID */ + __be16 chid; /* ISMv2 CHID */ +} __packed; /* format defined in + * IBM Shared Memory Communications Version 2 + * (https://www.ibm.com/support/pages/node/6326337) + */ + +struct smc_clc_v2_extension { + struct smc_clnt_opts_area_hdr hdr; + u8 roce[16]; /* RoCEv2 GID */ + u8 reserved[16]; + u8 user_eids[][SMC_MAX_EID_LEN]; +}; + +struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/ + __be32 outgoing_subnet; /* subnet mask */ + u8 prefix_len; /* number of significant bits in mask */ + u8 reserved[2]; + u8 ipv6_prefixes_cnt; /* number of IPv6 prefixes in prefix array */ +} __aligned(4); + +struct smc_clc_msg_smcd { /* SMC-D GID information */ + struct smc_clc_smcd_gid_chid ism; /* ISM native GID+CHID of requestor */ + __be16 v2_ext_offset; /* SMC Version 2 Extension Offset */ + u8 reserved[28]; +}; + +struct smc_clc_smcd_v2_extension { + u8 system_eid[SMC_MAX_EID_LEN]; + u8 reserved[16]; + struct smc_clc_smcd_gid_chid gidchid[]; +}; + +struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */ + struct smc_clc_msg_hdr hdr; + struct smc_clc_msg_local lcl; + __be16 iparea_offset; /* offset to IP address information area */ +} __aligned(4); + +#define SMC_CLC_MAX_V6_PREFIX 8 +#define SMC_CLC_MAX_UEID 8 + +struct smc_clc_msg_proposal_area { + struct smc_clc_msg_proposal pclc_base; + struct smc_clc_msg_smcd pclc_smcd; + struct smc_clc_msg_proposal_prefix pclc_prfx; + struct smc_clc_ipv6_prefix pclc_prfx_ipv6[SMC_CLC_MAX_V6_PREFIX]; + struct smc_clc_v2_extension pclc_v2_ext; + u8 user_eids[SMC_CLC_MAX_UEID][SMC_MAX_EID_LEN]; + struct smc_clc_smcd_v2_extension pclc_smcd_v2_ext; + struct smc_clc_smcd_gid_chid pclc_gidchids[SMC_MAX_ISM_DEVS]; + struct smc_clc_msg_trail pclc_trl; +}; + +struct smcr_clc_msg_accept_confirm { /* SMCR accept/confirm */ + struct smc_clc_msg_local lcl; + u8 qpn[3]; /* QP number */ + __be32 rmb_rkey; /* RMB rkey */ + u8 rmbe_idx; /* Index of RMBE in RMB */ + __be32 rmbe_alert_token; /* unique connection id */ + #if defined(__BIG_ENDIAN_BITFIELD) + u8 rmbe_size : 4, /* buf size (compressed) */ + qp_mtu : 4; /* QP mtu */ +#elif defined(__LITTLE_ENDIAN_BITFIELD) + u8 qp_mtu : 4, + rmbe_size : 4; +#endif + u8 reserved; + __be64 rmb_dma_addr; /* RMB virtual address */ + u8 reserved2; + u8 psn[3]; /* packet sequence number */ +} __packed; + +struct smcd_clc_msg_accept_confirm_common { /* SMCD accept/confirm */ + u64 gid; /* Sender GID */ + u64 token; /* DMB token */ + u8 dmbe_idx; /* DMBE index */ +#if defined(__BIG_ENDIAN_BITFIELD) + u8 dmbe_size : 4, /* buf size (compressed) */ + reserved3 : 4; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + u8 reserved3 : 4, + dmbe_size : 4; +#endif + u16 reserved4; + __be32 linkid; /* Link identifier */ +} __packed; + +#define SMC_CLC_OS_ZOS 1 +#define SMC_CLC_OS_LINUX 2 +#define SMC_CLC_OS_AIX 3 + +struct smc_clc_first_contact_ext { +#if defined(__BIG_ENDIAN_BITFIELD) + u8 v2_direct : 1, + reserved : 7; + u8 os_type : 4, + release : 4; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + u8 reserved : 7, + v2_direct : 1; + u8 release : 4, + os_type : 4; +#endif + u8 reserved2[2]; + u8 hostname[SMC_MAX_HOSTNAME_LEN]; +}; + +struct smc_clc_fce_gid_ext { + u8 reserved[16]; + u8 gid_cnt; + u8 reserved2[3]; + u8 gid[][SMC_GID_SIZE]; +}; + +struct smc_clc_msg_accept_confirm { /* clc accept / confirm message */ + struct smc_clc_msg_hdr hdr; + union { + struct smcr_clc_msg_accept_confirm r0; /* SMC-R */ + struct { /* SMC-D */ + struct smcd_clc_msg_accept_confirm_common d0; + u32 reserved5[3]; + }; + }; +} __packed; /* format defined in RFC7609 */ + +struct smc_clc_msg_accept_confirm_v2 { /* clc accept / confirm message */ + struct smc_clc_msg_hdr hdr; + union { + struct { /* SMC-R */ + struct smcr_clc_msg_accept_confirm r0; + u8 eid[SMC_MAX_EID_LEN]; + u8 reserved6[8]; + } r1; + struct { /* SMC-D */ + struct smcd_clc_msg_accept_confirm_common d0; + __be16 chid; + u8 eid[SMC_MAX_EID_LEN]; + u8 reserved5[8]; + } d1; + }; +}; + +struct smc_clc_msg_decline { /* clc decline message */ + struct smc_clc_msg_hdr hdr; + u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */ + __be32 peer_diagnosis; /* diagnosis information */ +#if defined(__BIG_ENDIAN_BITFIELD) + u8 os_type : 4, + reserved : 4; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + u8 reserved : 4, + os_type : 4; +#endif + u8 reserved2[3]; + struct smc_clc_msg_trail trl; /* eye catcher "SMCD" or "SMCR" EBCDIC */ +} __aligned(4); + +#define SMC_DECL_DIAG_COUNT_V2 4 /* no. of additional peer diagnosis codes */ + +struct smc_clc_msg_decline_v2 { /* clc decline message */ + struct smc_clc_msg_hdr hdr; + u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */ + __be32 peer_diagnosis; /* diagnosis information */ +#if defined(__BIG_ENDIAN_BITFIELD) + u8 os_type : 4, + reserved : 4; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + u8 reserved : 4, + os_type : 4; +#endif + u8 reserved2[3]; + __be32 peer_diagnosis_v2[SMC_DECL_DIAG_COUNT_V2]; + struct smc_clc_msg_trail trl; /* eye catcher "SMCD" or "SMCR" EBCDIC */ +} __aligned(4); + +/* determine start of the prefix area within the proposal message */ +static inline struct smc_clc_msg_proposal_prefix * +smc_clc_proposal_get_prefix(struct smc_clc_msg_proposal *pclc) +{ + return (struct smc_clc_msg_proposal_prefix *) + ((u8 *)pclc + sizeof(*pclc) + ntohs(pclc->iparea_offset)); +} + +static inline bool smcr_indicated(int smc_type) +{ + return smc_type == SMC_TYPE_R || smc_type == SMC_TYPE_B; +} + +static inline bool smcd_indicated(int smc_type) +{ + return smc_type == SMC_TYPE_D || smc_type == SMC_TYPE_B; +} + +static inline u8 smc_indicated_type(int is_smcd, int is_smcr) +{ + if (is_smcd && is_smcr) + return SMC_TYPE_B; + if (is_smcd) + return SMC_TYPE_D; + if (is_smcr) + return SMC_TYPE_R; + return SMC_TYPE_N; +} + +/* get SMC-D info from proposal message */ +static inline struct smc_clc_msg_smcd * +smc_get_clc_msg_smcd(struct smc_clc_msg_proposal *prop) +{ + if (smcd_indicated(prop->hdr.typev1) && + ntohs(prop->iparea_offset) != sizeof(struct smc_clc_msg_smcd)) + return NULL; + + return (struct smc_clc_msg_smcd *)(prop + 1); +} + +static inline struct smc_clc_v2_extension * +smc_get_clc_v2_ext(struct smc_clc_msg_proposal *prop) +{ + struct smc_clc_msg_smcd *prop_smcd = smc_get_clc_msg_smcd(prop); + + if (!prop_smcd || !ntohs(prop_smcd->v2_ext_offset)) + return NULL; + + return (struct smc_clc_v2_extension *) + ((u8 *)prop_smcd + + offsetof(struct smc_clc_msg_smcd, v2_ext_offset) + + sizeof(prop_smcd->v2_ext_offset) + + ntohs(prop_smcd->v2_ext_offset)); +} + +static inline struct smc_clc_smcd_v2_extension * +smc_get_clc_smcd_v2_ext(struct smc_clc_v2_extension *prop_v2ext) +{ + if (!prop_v2ext) + return NULL; + if (!ntohs(prop_v2ext->hdr.smcd_v2_ext_offset)) + return NULL; + + return (struct smc_clc_smcd_v2_extension *) + ((u8 *)prop_v2ext + + offsetof(struct smc_clc_v2_extension, hdr) + + offsetof(struct smc_clnt_opts_area_hdr, smcd_v2_ext_offset) + + sizeof(prop_v2ext->hdr.smcd_v2_ext_offset) + + ntohs(prop_v2ext->hdr.smcd_v2_ext_offset)); +} + +struct smcd_dev; +struct smc_init_info; + +int smc_clc_prfx_match(struct socket *clcsock, + struct smc_clc_msg_proposal_prefix *prop); +int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, + u8 expected_type, unsigned long timeout); +int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info, u8 version); +int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini); +int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact, + u8 version, u8 *eid, struct smc_init_info *ini); +int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact, + u8 version, u8 *negotiated_eid); +void smc_clc_init(void) __init; +void smc_clc_exit(void); +void smc_clc_get_hostname(u8 **host); +bool smc_clc_match_eid(u8 *negotiated_eid, + struct smc_clc_v2_extension *smc_v2_ext, + u8 *peer_eid, u8 *local_eid); +int smc_clc_ueid_count(void); +int smc_nl_dump_ueid(struct sk_buff *skb, struct netlink_callback *cb); +int smc_nl_add_ueid(struct sk_buff *skb, struct genl_info *info); +int smc_nl_remove_ueid(struct sk_buff *skb, struct genl_info *info); +int smc_nl_flush_ueid(struct sk_buff *skb, struct genl_info *info); +int smc_nl_dump_seid(struct sk_buff *skb, struct netlink_callback *cb); +int smc_nl_enable_seid(struct sk_buff *skb, struct genl_info *info); +int smc_nl_disable_seid(struct sk_buff *skb, struct genl_info *info); + +#endif -- cgit v1.2.3