diff options
Diffstat (limited to 'net/smc/smc.h')
| -rw-r--r-- | net/smc/smc.h | 188 |
1 files changed, 173 insertions, 15 deletions
diff --git a/net/smc/smc.h b/net/smc/smc.h index 5721416d0605..9e6af72784ba 100644 --- a/net/smc/smc.h +++ b/net/smc/smc.h @@ -14,16 +14,64 @@ #include <linux/socket.h> #include <linux/types.h> #include <linux/compiler.h> /* __aligned */ +#include <net/genetlink.h> #include <net/sock.h> #include "smc_ib.h" +#define SMC_V1 1 /* SMC version V1 */ +#define SMC_V2 2 /* SMC version V2 */ + +#define SMC_RELEASE_0 0 +#define SMC_RELEASE_1 1 +#define SMC_RELEASE SMC_RELEASE_1 /* the latest release version */ + #define SMCPROTO_SMC 0 /* SMC protocol, IPv4 */ #define SMCPROTO_SMC6 1 /* SMC protocol, IPv6 */ +#define SMC_AUTOCORKING_DEFAULT_SIZE 0x10000 /* 64K by default */ + extern struct proto smc_proto; extern struct proto smc_proto6; +extern struct smc_hashinfo smc_v4_hashinfo; +extern struct smc_hashinfo smc_v6_hashinfo; + +int smc_hash_sk(struct sock *sk); +void smc_unhash_sk(struct sock *sk); +void smc_release_cb(struct sock *sk); + +int smc_release(struct socket *sock); +int smc_bind(struct socket *sock, struct sockaddr_unsized *uaddr, + int addr_len); +int smc_connect(struct socket *sock, struct sockaddr_unsized *addr, + int alen, int flags); +int smc_accept(struct socket *sock, struct socket *new_sock, + struct proto_accept_arg *arg); +int smc_getname(struct socket *sock, struct sockaddr *addr, + int peer); +__poll_t smc_poll(struct file *file, struct socket *sock, + poll_table *wait); +int smc_ioctl(struct socket *sock, unsigned int cmd, + unsigned long arg); +int smc_listen(struct socket *sock, int backlog); +int smc_shutdown(struct socket *sock, int how); +int smc_setsockopt(struct socket *sock, int level, int optname, + sockptr_t optval, unsigned int optlen); +int smc_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *optlen); +int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len); +int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + int flags); +ssize_t smc_splice_read(struct socket *sock, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags); + +/* smc sock initialization */ +void smc_sk_init(struct net *net, struct sock *sk, int protocol); +/* clcsock initialization */ +int smc_create_clcsk(struct net *net, struct sock *sk, int family); + #ifdef ATOMIC64_INIT #define KERNEL_HAS_ATOMIC64 #endif @@ -45,10 +93,30 @@ enum smc_state { /* possible states of an SMC socket */ SMC_PROCESSABORT = 27, }; +enum smc_supplemental_features { + SMC_SPF_EMULATED_ISM_DEV = 0, +}; + +#define SMC_FEATURE_MASK \ + (BIT(SMC_SPF_EMULATED_ISM_DEV)) + struct smc_link_group; struct smc_wr_rx_hdr { /* common prefix part of LLC and CDC to demultiplex */ - u8 type; + union { + u8 type; +#if defined(__BIG_ENDIAN_BITFIELD) + struct { + u8 llc_version:4, + llc_type:4; + }; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + struct { + u8 llc_type:4, + llc_version:4; + }; +#endif + }; } __aligned(1); struct smc_cdc_conn_state_flags { @@ -113,14 +181,21 @@ struct smc_host_cdc_msg { /* Connection Data Control message */ } __aligned(8); enum smc_urg_state { - SMC_URG_VALID, /* data present */ - SMC_URG_NOTYET, /* data pending */ - SMC_URG_READ /* data was already read */ + SMC_URG_VALID = 1, /* data present */ + SMC_URG_NOTYET = 2, /* data pending */ + SMC_URG_READ = 3, /* data was already read */ +}; + +struct smc_mark_woken { + bool woken; + void *key; + wait_queue_entry_t wait_entry; }; struct smc_connection { struct rb_node alert_node; struct smc_link_group *lgr; /* link group of connection */ + struct smc_link *lnk; /* assigned SMC-R link */ u32 alert_token_local; /* unique conn. id */ u8 peer_rmbe_idx; /* from tcp handshake */ int peer_rmbe_size; /* size of peer rx buffer */ @@ -131,7 +206,7 @@ struct smc_connection { struct smc_buf_desc *sndbuf_desc; /* send buffer descriptor */ struct smc_buf_desc *rmb_desc; /* RMBE descriptor */ - int rmbe_size_short;/* compressed notation */ + int rmbe_size_comp; /* compressed notation */ int rmbe_update_limit; /* lower limit for consumer * cursor update @@ -142,6 +217,9 @@ struct smc_connection { * .prod cf. TCP snd_nxt * .cons cf. TCP sends ack */ + union smc_host_cursor local_tx_ctrl_fin; + /* prod crsr - confirmed by peer + */ union smc_host_cursor tx_curs_prep; /* tx - prepared data * snd_max..wmem_alloc */ @@ -153,7 +231,13 @@ struct smc_connection { */ atomic_t sndbuf_space; /* remaining space in sndbuf */ u16 tx_cdc_seq; /* sequence # for CDC send */ + u16 tx_cdc_seq_fin; /* sequence # - tx completed */ spinlock_t send_lock; /* protect wr_sends */ + atomic_t cdc_pend_tx_wr; /* number of pending tx CDC wqe + * - inc when post wqe, + * - dec on polled tx cqe + */ + wait_queue_head_t cdc_pend_tx_wq; /* wakeup on no cdc_pend_tx_wr*/ struct delayed_work tx_work; /* retry of smc_cdc_msg_send */ u32 tx_off; /* base offset in peer rmb */ @@ -173,6 +257,10 @@ struct smc_connection { * data still pending */ char urg_rx_byte; /* urgent byte */ + bool tx_in_release_sock; + /* flush pending tx data in + * sock release_cb() + */ atomic_t bytes_to_rcv; /* arrived data, * not yet received */ @@ -183,33 +271,46 @@ struct smc_connection { spinlock_t acurs_lock; /* protect cursors */ #endif struct work_struct close_work; /* peer sent some closing */ + struct work_struct abort_work; /* abort the connection */ struct tasklet_struct rx_tsklet; /* Receiver tasklet for SMC-D */ u8 rx_off; /* receive offset: * 0 for SMC-R, 32 for SMC-D */ u64 peer_token; /* SMC-D token of peer */ -}; - -struct smc_connect_info { - int flags; - int alen; - struct sockaddr addr; + u8 killed : 1; /* abnormal termination */ + u8 freed : 1; /* normal termination */ + u8 out_of_sync : 1; /* out of sync with peer */ }; struct smc_sock { /* smc sock container */ - struct sock sk; + union { + struct sock sk; + struct inet_sock icsk_inet; + }; struct socket *clcsock; /* internal tcp socket */ + void (*clcsk_state_change)(struct sock *sk); + /* original stat_change fct. */ + void (*clcsk_data_ready)(struct sock *sk); + /* original data_ready fct. */ + void (*clcsk_write_space)(struct sock *sk); + /* original write_space fct. */ + void (*clcsk_error_report)(struct sock *sk); + /* original error_report fct. */ struct smc_connection conn; /* smc connection */ struct smc_sock *listen_smc; /* listen parent */ - struct smc_connect_info *connect_info; /* connect address & flags */ struct work_struct connect_work; /* handle non-blocking connect*/ struct work_struct tcp_listen_work;/* handle tcp socket accepts */ struct work_struct smc_listen_work;/* prepare new accept socket */ struct list_head accept_q; /* sockets to be accepted */ spinlock_t accept_q_lock; /* protects accept_q */ + bool limit_smc_hs; /* put constraint on handshake */ bool use_fallback; /* fallback to tcp */ int fallback_rsn; /* reason for fallback */ u32 peer_diagnosis; /* decline reason from peer */ + atomic_t queued_smc_hs; /* queued smc handshakes */ + struct inet_connection_sock_af_ops af_ops; + const struct inet_connection_sock_af_ops *ori_af_ops; + /* original af ops */ int sockopt_defer_accept; /* sockopt TCP_DEFER_ACCEPT * value @@ -219,21 +320,63 @@ struct smc_sock { /* smc sock container */ * started, waiting for unsent * data to be sent */ + u8 connect_nonblock : 1; + /* non-blocking connect in + * flight + */ struct mutex clcsock_release_lock; /* protects clcsock of a listen * socket * */ }; -static inline struct smc_sock *smc_sk(const struct sock *sk) +#define smc_sk(ptr) container_of_const(ptr, struct smc_sock, sk) + +static inline void smc_init_saved_callbacks(struct smc_sock *smc) +{ + smc->clcsk_state_change = NULL; + smc->clcsk_data_ready = NULL; + smc->clcsk_write_space = NULL; + smc->clcsk_error_report = NULL; +} + +static inline struct smc_sock *smc_clcsock_user_data(const struct sock *clcsk) +{ + return (struct smc_sock *) + ((uintptr_t)clcsk->sk_user_data & ~SK_USER_DATA_NOCOPY); +} + +/* save target_cb in saved_cb, and replace target_cb with new_cb */ +static inline void smc_clcsock_replace_cb(void (**target_cb)(struct sock *), + void (*new_cb)(struct sock *), + void (**saved_cb)(struct sock *)) { - return (struct smc_sock *)sk; + /* only save once */ + if (!*saved_cb) + *saved_cb = *target_cb; + *target_cb = new_cb; } +/* restore target_cb to saved_cb, and reset saved_cb to NULL */ +static inline void smc_clcsock_restore_cb(void (**target_cb)(struct sock *), + void (**saved_cb)(struct sock *)) +{ + if (!*saved_cb) + return; + *target_cb = *saved_cb; + *saved_cb = NULL; +} + +extern struct workqueue_struct *smc_hs_wq; /* wq for handshake work */ +extern struct workqueue_struct *smc_close_wq; /* wq for close work */ + #define SMC_SYSTEMID_LEN 8 extern u8 local_systemid[SMC_SYSTEMID_LEN]; /* unique system identifier */ +#define ntohll(x) be64_to_cpu(x) +#define htonll(x) cpu_to_be64(x) + /* convert an u32 value into network byte order, store it into a 3 byte field */ static inline void hton24(u8 *net, u32 host) { @@ -265,7 +408,22 @@ static inline bool using_ipsec(struct smc_sock *smc) } #endif +struct smc_gidlist; + struct sock *smc_accept_dequeue(struct sock *parent, struct socket *new_sock); void smc_close_non_accepted(struct sock *sk); +void smc_fill_gid_list(struct smc_link_group *lgr, + struct smc_gidlist *gidlist, + struct smc_ib_device *known_dev, u8 *known_gid); + +/* smc handshake limitation interface for netlink */ +int smc_nl_dump_hs_limitation(struct sk_buff *skb, struct netlink_callback *cb); +int smc_nl_enable_hs_limitation(struct sk_buff *skb, struct genl_info *info); +int smc_nl_disable_hs_limitation(struct sk_buff *skb, struct genl_info *info); + +static inline void smc_sock_set_flag(struct sock *sk, enum sock_flags flag) +{ + set_bit(flag, &sk->sk_flags); +} #endif /* __SMC_H */ |