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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107/* SPDX-License-Identifier: GPL-2.0 *//* * Shared Memory Communications over RDMA (SMC-R) and RoCE * * Definitions for the SMC module (socket related) * * Copyright IBM Corp. 2016 * * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> */#ifndef _SMC_H#define _SMC_H
#include <linux/device.h>#include <linux/spinlock.h>#include <linux/types.h>#include <linux/wait.h>#include <linux/dibs.h>
struct tcp_sock;struct inet_request_sock;struct sock;
#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
struct smc_hashinfo { rwlock_t lock; struct hlist_head ht;};
/* SMCD/ISM device driver interface */#define ISM_RESERVED_VLANID 0x1FFF
struct smcd_gid { u64 gid; u64 gid_ext;};
struct smcd_dev { struct dibs_dev *dibs; struct list_head list; spinlock_t lock; struct list_head vlan; struct workqueue_struct *event_wq; u8 pnetid[SMC_MAX_PNETID_LEN]; bool pnetid_by_user; struct list_head lgr_list; spinlock_t lgr_lock; atomic_t lgr_cnt; wait_queue_head_t lgrs_deleted; u8 going_away : 1; struct smc_connection *conn[];};
#define SMC_HS_CTRL_NAME_MAX 16
enum { /* ops can be inherit from init_net */ SMC_HS_CTRL_FLAG_INHERITABLE = 0x1,
SMC_HS_CTRL_ALL_FLAGS = SMC_HS_CTRL_FLAG_INHERITABLE,};
struct smc_hs_ctrl { /* private */
struct list_head list; struct module *owner;
/* public */
/* unique name */ char name[SMC_HS_CTRL_NAME_MAX]; int flags;
/* Invoked before computing SMC option for SYN packets. * We can control whether to set SMC options by returning various value. * Return 0 to disable SMC, or return any other value to enable it. */ int (*syn_option)(struct tcp_sock *tp);
/* Invoked before Set up SMC options for SYN-ACK packets * We can control whether to respond SMC options by returning various * value. Return 0 to disable SMC, or return any other value to enable * it. */ int (*synack_option)(const struct tcp_sock *tp, struct inet_request_sock *ireq);};
#if IS_ENABLED(CONFIG_SMC_HS_CTRL_BPF)#define smc_call_hsbpf(init_val, tp, func, ...) ({ \ typeof(init_val) __ret = (init_val); \ struct smc_hs_ctrl *ctrl; \ rcu_read_lock(); \ ctrl = rcu_dereference(sock_net((struct sock *)(tp))->smc.hs_ctrl); \ if (ctrl && ctrl->func) \ __ret = ctrl->func(tp, ##__VA_ARGS__); \ rcu_read_unlock(); \ __ret; \})#else#define smc_call_hsbpf(init_val, tp, ...) ({ (void)(tp); (init_val); })#endif /* CONFIG_SMC_HS_CTRL_BPF */
#endif /* _SMC_H */