@@ -11,12 +11,17 @@
#ifndef _SMC_H
#define _SMC_H
+#include <net/inet_connection_sock.h>
#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/wait.h>
#include "linux/ism.h"
+#ifdef ATOMIC64_INIT
+#define KERNEL_HAS_ATOMIC64
+#endif
+
struct sock;
#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
@@ -91,4 +96,224 @@ struct smcd_dev {
u8 going_away : 1;
};
+struct smc_wr_rx_hdr { /* common prefix part of LLC and CDC to demultiplex */
+ 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 {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ u8 peer_done_writing : 1; /* Sending done indicator */
+ u8 peer_conn_closed : 1; /* Peer connection closed indicator */
+ u8 peer_conn_abort : 1; /* Abnormal close indicator */
+ u8 reserved : 5;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ u8 reserved : 5;
+ u8 peer_conn_abort : 1;
+ u8 peer_conn_closed : 1;
+ u8 peer_done_writing : 1;
+#endif
+};
+
+struct smc_cdc_producer_flags {
+#if defined(__BIG_ENDIAN_BITFIELD)
+ u8 write_blocked : 1; /* Writing Blocked, no rx buf space */
+ u8 urg_data_pending : 1; /* Urgent Data Pending */
+ u8 urg_data_present : 1; /* Urgent Data Present */
+ u8 cons_curs_upd_req : 1; /* cursor update requested */
+ u8 failover_validation : 1;/* message replay due to failover */
+ u8 reserved : 3;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+ u8 reserved : 3;
+ u8 failover_validation : 1;
+ u8 cons_curs_upd_req : 1;
+ u8 urg_data_present : 1;
+ u8 urg_data_pending : 1;
+ u8 write_blocked : 1;
+#endif
+};
+
+/* in host byte order */
+union smc_host_cursor { /* SMC cursor - an offset in an RMBE */
+ struct {
+ u16 reserved;
+ u16 wrap; /* window wrap sequence number */
+ u32 count; /* cursor (= offset) part */
+ };
+#ifdef KERNEL_HAS_ATOMIC64
+ atomic64_t acurs; /* for atomic processing */
+#else
+ u64 acurs; /* for atomic processing */
+#endif
+} __aligned(8);
+
+/* in host byte order, except for flag bitfields in network byte order */
+struct smc_host_cdc_msg { /* Connection Data Control message */
+ struct smc_wr_rx_hdr common; /* .type = 0xFE */
+ u8 len; /* length = 44 */
+ u16 seqno; /* connection seq # */
+ u32 token; /* alert_token */
+ union smc_host_cursor prod; /* producer cursor */
+ union smc_host_cursor cons; /* consumer cursor,
+ * piggy backed "ack"
+ */
+ struct smc_cdc_producer_flags prod_flags; /* conn. tx/rx status */
+ struct smc_cdc_conn_state_flags conn_state_flags; /* peer conn. status*/
+ u8 reserved[18];
+} __aligned(8);
+
+enum smc_urg_state {
+ SMC_URG_VALID = 1, /* data present */
+ SMC_URG_NOTYET = 2, /* data pending */
+ SMC_URG_READ = 3, /* data was already read */
+};
+
+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 */
+ atomic_t peer_rmbe_space;/* remaining free bytes in peer
+ * rmbe
+ */
+ int rtoken_idx; /* idx to peer RMB rkey/addr */
+
+ 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_update_limit;
+ /* lower limit for consumer
+ * cursor update
+ */
+
+ struct smc_host_cdc_msg local_tx_ctrl; /* host byte order staging
+ * buffer for CDC msg send
+ * .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
+ */
+ union smc_host_cursor tx_curs_sent; /* tx - sent data
+ * snd_nxt ?
+ */
+ union smc_host_cursor tx_curs_fin; /* tx - confirmed by peer
+ * snd-wnd-begin ?
+ */
+ 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*/
+ atomic_t tx_pushing; /* nr_threads trying tx push */
+ struct delayed_work tx_work; /* retry of smc_cdc_msg_send */
+ u32 tx_off; /* base offset in peer rmb */
+
+ struct smc_host_cdc_msg local_rx_ctrl; /* filled during event_handl.
+ * .prod cf. TCP rcv_nxt
+ * .cons cf. TCP snd_una
+ */
+ union smc_host_cursor rx_curs_confirmed; /* confirmed to peer
+ * source of snd_una ?
+ */
+ union smc_host_cursor urg_curs; /* points at urgent byte */
+ enum smc_urg_state urg_state;
+ bool urg_tx_pend; /* urgent data staged */
+ bool urg_rx_skip_pend;
+ /* indicate urgent oob data
+ * read, but previous regular
+ * 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
+ */
+ atomic_t splice_pending; /* number of spliced bytes
+ * pending processing
+ */
+#ifndef KERNEL_HAS_ATOMIC64
+ 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 */
+ u8 killed : 1; /* abnormal termination */
+ u8 freed : 1; /* normal termiation */
+ u8 out_of_sync : 1; /* out of sync with peer */
+};
+
+struct smc_sock { /* smc sock container */
+ struct sock sk;
+ 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 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
+ */
+ u8 wait_close_tx_prepared : 1;
+ /* shutdown wr or close
+ * 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
+ */
+};
+
#endif /* _SMC_H */
@@ -34,10 +34,6 @@
extern struct proto smc_proto;
extern struct proto smc_proto6;
-#ifdef ATOMIC64_INIT
-#define KERNEL_HAS_ATOMIC64
-#endif
-
enum smc_state { /* possible states of an SMC socket */
SMC_ACTIVE = 1,
SMC_INIT = 2,
@@ -57,232 +53,12 @@ enum smc_state { /* possible states of an SMC socket */
struct smc_link_group;
-struct smc_wr_rx_hdr { /* common prefix part of LLC and CDC to demultiplex */
- 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 {
-#if defined(__BIG_ENDIAN_BITFIELD)
- u8 peer_done_writing : 1; /* Sending done indicator */
- u8 peer_conn_closed : 1; /* Peer connection closed indicator */
- u8 peer_conn_abort : 1; /* Abnormal close indicator */
- u8 reserved : 5;
-#elif defined(__LITTLE_ENDIAN_BITFIELD)
- u8 reserved : 5;
- u8 peer_conn_abort : 1;
- u8 peer_conn_closed : 1;
- u8 peer_done_writing : 1;
-#endif
-};
-
-struct smc_cdc_producer_flags {
-#if defined(__BIG_ENDIAN_BITFIELD)
- u8 write_blocked : 1; /* Writing Blocked, no rx buf space */
- u8 urg_data_pending : 1; /* Urgent Data Pending */
- u8 urg_data_present : 1; /* Urgent Data Present */
- u8 cons_curs_upd_req : 1; /* cursor update requested */
- u8 failover_validation : 1;/* message replay due to failover */
- u8 reserved : 3;
-#elif defined(__LITTLE_ENDIAN_BITFIELD)
- u8 reserved : 3;
- u8 failover_validation : 1;
- u8 cons_curs_upd_req : 1;
- u8 urg_data_present : 1;
- u8 urg_data_pending : 1;
- u8 write_blocked : 1;
-#endif
-};
-
-/* in host byte order */
-union smc_host_cursor { /* SMC cursor - an offset in an RMBE */
- struct {
- u16 reserved;
- u16 wrap; /* window wrap sequence number */
- u32 count; /* cursor (= offset) part */
- };
-#ifdef KERNEL_HAS_ATOMIC64
- atomic64_t acurs; /* for atomic processing */
-#else
- u64 acurs; /* for atomic processing */
-#endif
-} __aligned(8);
-
-/* in host byte order, except for flag bitfields in network byte order */
-struct smc_host_cdc_msg { /* Connection Data Control message */
- struct smc_wr_rx_hdr common; /* .type = 0xFE */
- u8 len; /* length = 44 */
- u16 seqno; /* connection seq # */
- u32 token; /* alert_token */
- union smc_host_cursor prod; /* producer cursor */
- union smc_host_cursor cons; /* consumer cursor,
- * piggy backed "ack"
- */
- struct smc_cdc_producer_flags prod_flags; /* conn. tx/rx status */
- struct smc_cdc_conn_state_flags conn_state_flags; /* peer conn. status*/
- u8 reserved[18];
-} __aligned(8);
-
-enum smc_urg_state {
- 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 */
- atomic_t peer_rmbe_space;/* remaining free bytes in peer
- * rmbe
- */
- int rtoken_idx; /* idx to peer RMB rkey/addr */
-
- 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_update_limit;
- /* lower limit for consumer
- * cursor update
- */
-
- struct smc_host_cdc_msg local_tx_ctrl; /* host byte order staging
- * buffer for CDC msg send
- * .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
- */
- union smc_host_cursor tx_curs_sent; /* tx - sent data
- * snd_nxt ?
- */
- union smc_host_cursor tx_curs_fin; /* tx - confirmed by peer
- * snd-wnd-begin ?
- */
- 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*/
- atomic_t tx_pushing; /* nr_threads trying tx push */
- struct delayed_work tx_work; /* retry of smc_cdc_msg_send */
- u32 tx_off; /* base offset in peer rmb */
-
- struct smc_host_cdc_msg local_rx_ctrl; /* filled during event_handl.
- * .prod cf. TCP rcv_nxt
- * .cons cf. TCP snd_una
- */
- union smc_host_cursor rx_curs_confirmed; /* confirmed to peer
- * source of snd_una ?
- */
- union smc_host_cursor urg_curs; /* points at urgent byte */
- enum smc_urg_state urg_state;
- bool urg_tx_pend; /* urgent data staged */
- bool urg_rx_skip_pend;
- /* indicate urgent oob data
- * read, but previous regular
- * 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
- */
- atomic_t splice_pending; /* number of spliced bytes
- * pending processing
- */
-#ifndef KERNEL_HAS_ATOMIC64
- 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 */
- u8 killed : 1; /* abnormal termination */
- u8 freed : 1; /* normal termiation */
- u8 out_of_sync : 1; /* out of sync with peer */
-};
-
-struct smc_sock { /* smc sock container */
- struct sock sk;
- 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 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
- */
- u8 wait_close_tx_prepared : 1;
- /* shutdown wr or close
- * 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
- * */
-};
-
#define smc_sk(ptr) container_of_const(ptr, struct smc_sock, sk)
static inline void smc_init_saved_callbacks(struct smc_sock *smc)