| #ifndef _RDS_RDS_H |
| #define _RDS_RDS_H |
| |
| #include <net/sock.h> |
| #include <linux/scatterlist.h> |
| #include <linux/highmem.h> |
| #include <rdma/rdma_cm.h> |
| #include <linux/mutex.h> |
| #include <linux/rds.h> |
| |
| #include "info.h" |
| |
| /* |
| * RDS Network protocol version |
| */ |
| #define RDS_PROTOCOL_3_0 0x0300 |
| #define RDS_PROTOCOL_3_1 0x0301 |
| #define RDS_PROTOCOL_VERSION RDS_PROTOCOL_3_1 |
| #define RDS_PROTOCOL_MAJOR(v) ((v) >> 8) |
| #define RDS_PROTOCOL_MINOR(v) ((v) & 255) |
| #define RDS_PROTOCOL(maj, min) (((maj) << 8) | min) |
| |
| /* |
| * XXX randomly chosen, but at least seems to be unused: |
| * # 18464-18768 Unassigned |
| * We should do better. We want a reserved port to discourage unpriv'ed |
| * userspace from listening. |
| */ |
| #define RDS_PORT 18634 |
| |
| #ifdef ATOMIC64_INIT |
| #define KERNEL_HAS_ATOMIC64 |
| #endif |
| |
| #ifdef DEBUG |
| #define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args) |
| #else |
| /* sigh, pr_debug() causes unused variable warnings */ |
| static inline void __attribute__ ((format (printf, 1, 2))) |
| rdsdebug(char *fmt, ...) |
| { |
| } |
| #endif |
| |
| /* XXX is there one of these somewhere? */ |
| #define ceil(x, y) \ |
| ({ unsigned long __x = (x), __y = (y); (__x + __y - 1) / __y; }) |
| |
| #define RDS_FRAG_SHIFT 12 |
| #define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT)) |
| |
| #define RDS_CONG_MAP_BYTES (65536 / 8) |
| #define RDS_CONG_MAP_LONGS (RDS_CONG_MAP_BYTES / sizeof(unsigned long)) |
| #define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE) |
| #define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8) |
| |
| struct rds_cong_map { |
| struct rb_node m_rb_node; |
| __be32 m_addr; |
| wait_queue_head_t m_waitq; |
| struct list_head m_conn_list; |
| unsigned long m_page_addrs[RDS_CONG_MAP_PAGES]; |
| }; |
| |
| |
| /* |
| * This is how we will track the connection state: |
| * A connection is always in one of the following |
| * states. Updates to the state are atomic and imply |
| * a memory barrier. |
| */ |
| enum { |
| RDS_CONN_DOWN = 0, |
| RDS_CONN_CONNECTING, |
| RDS_CONN_DISCONNECTING, |
| RDS_CONN_UP, |
| RDS_CONN_ERROR, |
| }; |
| |
| /* Bits for c_flags */ |
| #define RDS_LL_SEND_FULL 0 |
| #define RDS_RECONNECT_PENDING 1 |
| |
| struct rds_connection { |
| struct hlist_node c_hash_node; |
| __be32 c_laddr; |
| __be32 c_faddr; |
| unsigned int c_loopback:1; |
| struct rds_connection *c_passive; |
| |
| struct rds_cong_map *c_lcong; |
| struct rds_cong_map *c_fcong; |
| |
| struct mutex c_send_lock; /* protect send ring */ |
| struct rds_message *c_xmit_rm; |
| unsigned long c_xmit_sg; |
| unsigned int c_xmit_hdr_off; |
| unsigned int c_xmit_data_off; |
| unsigned int c_xmit_atomic_sent; |
| unsigned int c_xmit_rdma_sent; |
| unsigned int c_xmit_data_sent; |
| |
| spinlock_t c_lock; /* protect msg queues */ |
| u64 c_next_tx_seq; |
| struct list_head c_send_queue; |
| struct list_head c_retrans; |
| |
| u64 c_next_rx_seq; |
| |
| struct rds_transport *c_trans; |
| void *c_transport_data; |
| |
| atomic_t c_state; |
| unsigned long c_flags; |
| unsigned long c_reconnect_jiffies; |
| struct delayed_work c_send_w; |
| struct delayed_work c_recv_w; |
| struct delayed_work c_conn_w; |
| struct work_struct c_down_w; |
| struct mutex c_cm_lock; /* protect conn state & cm */ |
| |
| struct list_head c_map_item; |
| unsigned long c_map_queued; |
| |
| unsigned int c_unacked_packets; |
| unsigned int c_unacked_bytes; |
| |
| /* Protocol version */ |
| unsigned int c_version; |
| }; |
| |
| #define RDS_FLAG_CONG_BITMAP 0x01 |
| #define RDS_FLAG_ACK_REQUIRED 0x02 |
| #define RDS_FLAG_RETRANSMITTED 0x04 |
| #define RDS_MAX_ADV_CREDIT 255 |
| |
| /* |
| * Maximum space available for extension headers. |
| */ |
| #define RDS_HEADER_EXT_SPACE 16 |
| |
| struct rds_header { |
| __be64 h_sequence; |
| __be64 h_ack; |
| __be32 h_len; |
| __be16 h_sport; |
| __be16 h_dport; |
| u8 h_flags; |
| u8 h_credit; |
| u8 h_padding[4]; |
| __sum16 h_csum; |
| |
| u8 h_exthdr[RDS_HEADER_EXT_SPACE]; |
| }; |
| |
| /* |
| * Reserved - indicates end of extensions |
| */ |
| #define RDS_EXTHDR_NONE 0 |
| |
| /* |
| * This extension header is included in the very |
| * first message that is sent on a new connection, |
| * and identifies the protocol level. This will help |
| * rolling updates if a future change requires breaking |
| * the protocol. |
| * NB: This is no longer true for IB, where we do a version |
| * negotiation during the connection setup phase (protocol |
| * version information is included in the RDMA CM private data). |
| */ |
| #define RDS_EXTHDR_VERSION 1 |
| struct rds_ext_header_version { |
| __be32 h_version; |
| }; |
| |
| /* |
| * This extension header is included in the RDS message |
| * chasing an RDMA operation. |
| */ |
| #define RDS_EXTHDR_RDMA 2 |
| struct rds_ext_header_rdma { |
| __be32 h_rdma_rkey; |
| }; |
| |
| /* |
| * This extension header tells the peer about the |
| * destination <R_Key,offset> of the requested RDMA |
| * operation. |
| */ |
| #define RDS_EXTHDR_RDMA_DEST 3 |
| struct rds_ext_header_rdma_dest { |
| __be32 h_rdma_rkey; |
| __be32 h_rdma_offset; |
| }; |
| |
| #define __RDS_EXTHDR_MAX 16 /* for now */ |
| |
| struct rds_incoming { |
| atomic_t i_refcount; |
| struct list_head i_item; |
| struct rds_connection *i_conn; |
| struct rds_header i_hdr; |
| unsigned long i_rx_jiffies; |
| __be32 i_saddr; |
| |
| rds_rdma_cookie_t i_rdma_cookie; |
| }; |
| |
| struct rds_mr { |
| struct rb_node r_rb_node; |
| atomic_t r_refcount; |
| u32 r_key; |
| |
| /* A copy of the creation flags */ |
| unsigned int r_use_once:1; |
| unsigned int r_invalidate:1; |
| unsigned int r_write:1; |
| |
| /* This is for RDS_MR_DEAD. |
| * It would be nice & consistent to make this part of the above |
| * bit field here, but we need to use test_and_set_bit. |
| */ |
| unsigned long r_state; |
| struct rds_sock *r_sock; /* back pointer to the socket that owns us */ |
| struct rds_transport *r_trans; |
| void *r_trans_private; |
| }; |
| |
| /* Flags for mr->r_state */ |
| #define RDS_MR_DEAD 0 |
| |
| static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset) |
| { |
| return r_key | (((u64) offset) << 32); |
| } |
| |
| static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie) |
| { |
| return cookie; |
| } |
| |
| static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie) |
| { |
| return cookie >> 32; |
| } |
| |
| /* atomic operation types */ |
| #define RDS_ATOMIC_TYPE_CSWP 0 |
| #define RDS_ATOMIC_TYPE_FADD 1 |
| |
| /* |
| * m_sock_item and m_conn_item are on lists that are serialized under |
| * conn->c_lock. m_sock_item has additional meaning in that once it is empty |
| * the message will not be put back on the retransmit list after being sent. |
| * messages that are canceled while being sent rely on this. |
| * |
| * m_inc is used by loopback so that it can pass an incoming message straight |
| * back up into the rx path. It embeds a wire header which is also used by |
| * the send path, which is kind of awkward. |
| * |
| * m_sock_item indicates the message's presence on a socket's send or receive |
| * queue. m_rs will point to that socket. |
| * |
| * m_daddr is used by cancellation to prune messages to a given destination. |
| * |
| * The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock |
| * nesting. As paths iterate over messages on a sock, or conn, they must |
| * also lock the conn, or sock, to remove the message from those lists too. |
| * Testing the flag to determine if the message is still on the lists lets |
| * us avoid testing the list_head directly. That means each path can use |
| * the message's list_head to keep it on a local list while juggling locks |
| * without confusing the other path. |
| * |
| * m_ack_seq is an optional field set by transports who need a different |
| * sequence number range to invalidate. They can use this in a callback |
| * that they pass to rds_send_drop_acked() to see if each message has been |
| * acked. The HAS_ACK_SEQ flag can be used to detect messages which haven't |
| * had ack_seq set yet. |
| */ |
| #define RDS_MSG_ON_SOCK 1 |
| #define RDS_MSG_ON_CONN 2 |
| #define RDS_MSG_HAS_ACK_SEQ 3 |
| #define RDS_MSG_ACK_REQUIRED 4 |
| #define RDS_MSG_RETRANSMITTED 5 |
| #define RDS_MSG_MAPPED 6 |
| #define RDS_MSG_PAGEVEC 7 |
| |
| struct rds_message { |
| atomic_t m_refcount; |
| struct list_head m_sock_item; |
| struct list_head m_conn_item; |
| struct rds_incoming m_inc; |
| u64 m_ack_seq; |
| __be32 m_daddr; |
| unsigned long m_flags; |
| |
| /* Never access m_rs without holding m_rs_lock. |
| * Lock nesting is |
| * rm->m_rs_lock |
| * -> rs->rs_lock |
| */ |
| spinlock_t m_rs_lock; |
| struct rds_sock *m_rs; |
| |
| /* cookie to send to remote, in rds header */ |
| rds_rdma_cookie_t m_rdma_cookie; |
| |
| unsigned int m_used_sgs; |
| unsigned int m_total_sgs; |
| |
| struct { |
| struct rm_atomic_op { |
| int op_type; |
| uint64_t op_swap_add; |
| uint64_t op_compare; |
| |
| u32 op_rkey; |
| u64 op_remote_addr; |
| unsigned int op_notify:1; |
| unsigned int op_recverr:1; |
| unsigned int op_mapped:1; |
| unsigned int op_silent:1; |
| unsigned int op_active:1; |
| struct scatterlist *op_sg; |
| struct rds_notifier *op_notifier; |
| |
| struct rds_mr *op_rdma_mr; |
| } atomic; |
| struct rm_rdma_op { |
| u32 op_rkey; |
| u64 op_remote_addr; |
| unsigned int op_write:1; |
| unsigned int op_fence:1; |
| unsigned int op_notify:1; |
| unsigned int op_recverr:1; |
| unsigned int op_mapped:1; |
| unsigned int op_silent:1; |
| unsigned int op_active:1; |
| unsigned int op_bytes; |
| unsigned int op_nents; |
| unsigned int op_count; |
| struct scatterlist *op_sg; |
| struct rds_notifier *op_notifier; |
| |
| struct rds_mr *op_rdma_mr; |
| } rdma; |
| struct rm_data_op { |
| unsigned int op_active:1; |
| unsigned int op_nents; |
| unsigned int op_count; |
| struct scatterlist *op_sg; |
| } data; |
| }; |
| }; |
| |
| /* |
| * The RDS notifier is used (optionally) to tell the application about |
| * completed RDMA operations. Rather than keeping the whole rds message |
| * around on the queue, we allocate a small notifier that is put on the |
| * socket's notifier_list. Notifications are delivered to the application |
| * through control messages. |
| */ |
| struct rds_notifier { |
| struct list_head n_list; |
| uint64_t n_user_token; |
| int n_status; |
| }; |
| |
| /** |
| * struct rds_transport - transport specific behavioural hooks |
| * |
| * @xmit: .xmit is called by rds_send_xmit() to tell the transport to send |
| * part of a message. The caller serializes on the send_sem so this |
| * doesn't need to be reentrant for a given conn. The header must be |
| * sent before the data payload. .xmit must be prepared to send a |
| * message with no data payload. .xmit should return the number of |
| * bytes that were sent down the connection, including header bytes. |
| * Returning 0 tells the caller that it doesn't need to perform any |
| * additional work now. This is usually the case when the transport has |
| * filled the sending queue for its connection and will handle |
| * triggering the rds thread to continue the send when space becomes |
| * available. Returning -EAGAIN tells the caller to retry the send |
| * immediately. Returning -ENOMEM tells the caller to retry the send at |
| * some point in the future. |
| * |
| * @conn_shutdown: conn_shutdown stops traffic on the given connection. Once |
| * it returns the connection can not call rds_recv_incoming(). |
| * This will only be called once after conn_connect returns |
| * non-zero success and will The caller serializes this with |
| * the send and connecting paths (xmit_* and conn_*). The |
| * transport is responsible for other serialization, including |
| * rds_recv_incoming(). This is called in process context but |
| * should try hard not to block. |
| * |
| * @xmit_cong_map: This asks the transport to send the local bitmap down the |
| * given connection. XXX get a better story about the bitmap |
| * flag and header. |
| */ |
| |
| #define RDS_TRANS_IB 0 |
| #define RDS_TRANS_IWARP 1 |
| #define RDS_TRANS_TCP 2 |
| #define RDS_TRANS_COUNT 3 |
| |
| struct rds_transport { |
| char t_name[TRANSNAMSIZ]; |
| struct list_head t_item; |
| struct module *t_owner; |
| unsigned int t_prefer_loopback:1; |
| unsigned int t_type; |
| |
| int (*laddr_check)(__be32 addr); |
| int (*conn_alloc)(struct rds_connection *conn, gfp_t gfp); |
| void (*conn_free)(void *data); |
| int (*conn_connect)(struct rds_connection *conn); |
| void (*conn_shutdown)(struct rds_connection *conn); |
| void (*xmit_prepare)(struct rds_connection *conn); |
| void (*xmit_complete)(struct rds_connection *conn); |
| int (*xmit)(struct rds_connection *conn, struct rds_message *rm, |
| unsigned int hdr_off, unsigned int sg, unsigned int off); |
| int (*xmit_cong_map)(struct rds_connection *conn, |
| struct rds_cong_map *map, unsigned long offset); |
| int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op); |
| int (*xmit_atomic)(struct rds_connection *conn, struct rds_message *rm); |
| int (*recv)(struct rds_connection *conn); |
| int (*inc_copy_to_user)(struct rds_incoming *inc, struct iovec *iov, |
| size_t size); |
| void (*inc_free)(struct rds_incoming *inc); |
| |
| int (*cm_handle_connect)(struct rdma_cm_id *cm_id, |
| struct rdma_cm_event *event); |
| int (*cm_initiate_connect)(struct rdma_cm_id *cm_id); |
| void (*cm_connect_complete)(struct rds_connection *conn, |
| struct rdma_cm_event *event); |
| |
| unsigned int (*stats_info_copy)(struct rds_info_iterator *iter, |
| unsigned int avail); |
| void (*exit)(void); |
| void *(*get_mr)(struct scatterlist *sg, unsigned long nr_sg, |
| struct rds_sock *rs, u32 *key_ret); |
| void (*sync_mr)(void *trans_private, int direction); |
| void (*free_mr)(void *trans_private, int invalidate); |
| void (*flush_mrs)(void); |
| }; |
| |
| struct rds_sock { |
| struct sock rs_sk; |
| |
| u64 rs_user_addr; |
| u64 rs_user_bytes; |
| |
| /* |
| * bound_addr used for both incoming and outgoing, no INADDR_ANY |
| * support. |
| */ |
| struct rb_node rs_bound_node; |
| __be32 rs_bound_addr; |
| __be32 rs_conn_addr; |
| __be16 rs_bound_port; |
| __be16 rs_conn_port; |
| |
| /* |
| * This is only used to communicate the transport between bind and |
| * initiating connections. All other trans use is referenced through |
| * the connection. |
| */ |
| struct rds_transport *rs_transport; |
| |
| /* |
| * rds_sendmsg caches the conn it used the last time around. |
| * This helps avoid costly lookups. |
| */ |
| struct rds_connection *rs_conn; |
| |
| /* flag indicating we were congested or not */ |
| int rs_congested; |
| /* seen congestion (ENOBUFS) when sending? */ |
| int rs_seen_congestion; |
| |
| /* rs_lock protects all these adjacent members before the newline */ |
| spinlock_t rs_lock; |
| struct list_head rs_send_queue; |
| u32 rs_snd_bytes; |
| int rs_rcv_bytes; |
| struct list_head rs_notify_queue; /* currently used for failed RDMAs */ |
| |
| /* Congestion wake_up. If rs_cong_monitor is set, we use cong_mask |
| * to decide whether the application should be woken up. |
| * If not set, we use rs_cong_track to find out whether a cong map |
| * update arrived. |
| */ |
| uint64_t rs_cong_mask; |
| uint64_t rs_cong_notify; |
| struct list_head rs_cong_list; |
| unsigned long rs_cong_track; |
| |
| /* |
| * rs_recv_lock protects the receive queue, and is |
| * used to serialize with rds_release. |
| */ |
| rwlock_t rs_recv_lock; |
| struct list_head rs_recv_queue; |
| |
| /* just for stats reporting */ |
| struct list_head rs_item; |
| |
| /* these have their own lock */ |
| spinlock_t rs_rdma_lock; |
| struct rb_root rs_rdma_keys; |
| |
| /* Socket options - in case there will be more */ |
| unsigned char rs_recverr, |
| rs_cong_monitor; |
| }; |
| |
| static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk) |
| { |
| return container_of(sk, struct rds_sock, rs_sk); |
| } |
| static inline struct sock *rds_rs_to_sk(struct rds_sock *rs) |
| { |
| return &rs->rs_sk; |
| } |
| |
| /* |
| * The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value |
| * to account for overhead. We don't account for overhead, we just apply |
| * the number of payload bytes to the specified value. |
| */ |
| static inline int rds_sk_sndbuf(struct rds_sock *rs) |
| { |
| return rds_rs_to_sk(rs)->sk_sndbuf / 2; |
| } |
| static inline int rds_sk_rcvbuf(struct rds_sock *rs) |
| { |
| return rds_rs_to_sk(rs)->sk_rcvbuf / 2; |
| } |
| |
| struct rds_statistics { |
| uint64_t s_conn_reset; |
| uint64_t s_recv_drop_bad_checksum; |
| uint64_t s_recv_drop_old_seq; |
| uint64_t s_recv_drop_no_sock; |
| uint64_t s_recv_drop_dead_sock; |
| uint64_t s_recv_deliver_raced; |
| uint64_t s_recv_delivered; |
| uint64_t s_recv_queued; |
| uint64_t s_recv_immediate_retry; |
| uint64_t s_recv_delayed_retry; |
| uint64_t s_recv_ack_required; |
| uint64_t s_recv_rdma_bytes; |
| uint64_t s_recv_ping; |
| uint64_t s_send_queue_empty; |
| uint64_t s_send_queue_full; |
| uint64_t s_send_sem_contention; |
| uint64_t s_send_sem_queue_raced; |
| uint64_t s_send_immediate_retry; |
| uint64_t s_send_delayed_retry; |
| uint64_t s_send_drop_acked; |
| uint64_t s_send_ack_required; |
| uint64_t s_send_queued; |
| uint64_t s_send_rdma; |
| uint64_t s_send_rdma_bytes; |
| uint64_t s_send_pong; |
| uint64_t s_page_remainder_hit; |
| uint64_t s_page_remainder_miss; |
| uint64_t s_copy_to_user; |
| uint64_t s_copy_from_user; |
| uint64_t s_cong_update_queued; |
| uint64_t s_cong_update_received; |
| uint64_t s_cong_send_error; |
| uint64_t s_cong_send_blocked; |
| uint64_t s_atomic_cswp; |
| uint64_t s_atomic_fadd; |
| }; |
| |
| /* af_rds.c */ |
| void rds_sock_addref(struct rds_sock *rs); |
| void rds_sock_put(struct rds_sock *rs); |
| void rds_wake_sk_sleep(struct rds_sock *rs); |
| static inline void __rds_wake_sk_sleep(struct sock *sk) |
| { |
| wait_queue_head_t *waitq = sk_sleep(sk); |
| |
| if (!sock_flag(sk, SOCK_DEAD) && waitq) |
| wake_up(waitq); |
| } |
| extern wait_queue_head_t rds_poll_waitq; |
| |
| |
| /* bind.c */ |
| int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); |
| void rds_remove_bound(struct rds_sock *rs); |
| struct rds_sock *rds_find_bound(__be32 addr, __be16 port); |
| |
| /* cong.c */ |
| int rds_cong_get_maps(struct rds_connection *conn); |
| void rds_cong_add_conn(struct rds_connection *conn); |
| void rds_cong_remove_conn(struct rds_connection *conn); |
| void rds_cong_set_bit(struct rds_cong_map *map, __be16 port); |
| void rds_cong_clear_bit(struct rds_cong_map *map, __be16 port); |
| int rds_cong_wait(struct rds_cong_map *map, __be16 port, int nonblock, struct rds_sock *rs); |
| void rds_cong_queue_updates(struct rds_cong_map *map); |
| void rds_cong_map_updated(struct rds_cong_map *map, uint64_t); |
| int rds_cong_updated_since(unsigned long *recent); |
| void rds_cong_add_socket(struct rds_sock *); |
| void rds_cong_remove_socket(struct rds_sock *); |
| void rds_cong_exit(void); |
| struct rds_message *rds_cong_update_alloc(struct rds_connection *conn); |
| |
| /* conn.c */ |
| int __init rds_conn_init(void); |
| void rds_conn_exit(void); |
| struct rds_connection *rds_conn_create(__be32 laddr, __be32 faddr, |
| struct rds_transport *trans, gfp_t gfp); |
| struct rds_connection *rds_conn_create_outgoing(__be32 laddr, __be32 faddr, |
| struct rds_transport *trans, gfp_t gfp); |
| void rds_conn_shutdown(struct rds_connection *conn); |
| void rds_conn_destroy(struct rds_connection *conn); |
| void rds_conn_reset(struct rds_connection *conn); |
| void rds_conn_drop(struct rds_connection *conn); |
| void rds_for_each_conn_info(struct socket *sock, unsigned int len, |
| struct rds_info_iterator *iter, |
| struct rds_info_lengths *lens, |
| int (*visitor)(struct rds_connection *, void *), |
| size_t item_len); |
| void __rds_conn_error(struct rds_connection *conn, const char *, ...) |
| __attribute__ ((format (printf, 2, 3))); |
| #define rds_conn_error(conn, fmt...) \ |
| __rds_conn_error(conn, KERN_WARNING "RDS: " fmt) |
| |
| static inline int |
| rds_conn_transition(struct rds_connection *conn, int old, int new) |
| { |
| return atomic_cmpxchg(&conn->c_state, old, new) == old; |
| } |
| |
| static inline int |
| rds_conn_state(struct rds_connection *conn) |
| { |
| return atomic_read(&conn->c_state); |
| } |
| |
| static inline int |
| rds_conn_up(struct rds_connection *conn) |
| { |
| return atomic_read(&conn->c_state) == RDS_CONN_UP; |
| } |
| |
| static inline int |
| rds_conn_connecting(struct rds_connection *conn) |
| { |
| return atomic_read(&conn->c_state) == RDS_CONN_CONNECTING; |
| } |
| |
| /* message.c */ |
| struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp); |
| struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents); |
| int rds_message_copy_from_user(struct rds_message *rm, struct iovec *first_iov, |
| size_t total_len); |
| struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len); |
| void rds_message_populate_header(struct rds_header *hdr, __be16 sport, |
| __be16 dport, u64 seq); |
| int rds_message_add_extension(struct rds_header *hdr, |
| unsigned int type, const void *data, unsigned int len); |
| int rds_message_next_extension(struct rds_header *hdr, |
| unsigned int *pos, void *buf, unsigned int *buflen); |
| int rds_message_add_version_extension(struct rds_header *hdr, unsigned int version); |
| int rds_message_get_version_extension(struct rds_header *hdr, unsigned int *version); |
| int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset); |
| int rds_message_inc_copy_to_user(struct rds_incoming *inc, |
| struct iovec *first_iov, size_t size); |
| void rds_message_inc_free(struct rds_incoming *inc); |
| void rds_message_addref(struct rds_message *rm); |
| void rds_message_put(struct rds_message *rm); |
| void rds_message_wait(struct rds_message *rm); |
| void rds_message_unmapped(struct rds_message *rm); |
| |
| static inline void rds_message_make_checksum(struct rds_header *hdr) |
| { |
| hdr->h_csum = 0; |
| hdr->h_csum = ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2); |
| } |
| |
| static inline int rds_message_verify_checksum(const struct rds_header *hdr) |
| { |
| return !hdr->h_csum || ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2) == 0; |
| } |
| |
| |
| /* page.c */ |
| int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes, |
| gfp_t gfp); |
| int rds_page_copy_user(struct page *page, unsigned long offset, |
| void __user *ptr, unsigned long bytes, |
| int to_user); |
| #define rds_page_copy_to_user(page, offset, ptr, bytes) \ |
| rds_page_copy_user(page, offset, ptr, bytes, 1) |
| #define rds_page_copy_from_user(page, offset, ptr, bytes) \ |
| rds_page_copy_user(page, offset, ptr, bytes, 0) |
| void rds_page_exit(void); |
| |
| /* recv.c */ |
| void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, |
| __be32 saddr); |
| void rds_inc_addref(struct rds_incoming *inc); |
| void rds_inc_put(struct rds_incoming *inc); |
| void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr, |
| struct rds_incoming *inc, gfp_t gfp, enum km_type km); |
| int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
| size_t size, int msg_flags); |
| void rds_clear_recv_queue(struct rds_sock *rs); |
| int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msg); |
| void rds_inc_info_copy(struct rds_incoming *inc, |
| struct rds_info_iterator *iter, |
| __be32 saddr, __be32 daddr, int flip); |
| |
| /* send.c */ |
| int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
| size_t payload_len); |
| void rds_send_reset(struct rds_connection *conn); |
| int rds_send_xmit(struct rds_connection *conn); |
| struct sockaddr_in; |
| void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest); |
| typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack); |
| void rds_send_drop_acked(struct rds_connection *conn, u64 ack, |
| is_acked_func is_acked); |
| int rds_send_acked_before(struct rds_connection *conn, u64 seq); |
| void rds_send_remove_from_sock(struct list_head *messages, int status); |
| int rds_send_pong(struct rds_connection *conn, __be16 dport); |
| struct rds_message *rds_send_get_message(struct rds_connection *, |
| struct rm_rdma_op *); |
| |
| /* rdma.c */ |
| void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force); |
| int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen); |
| int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen); |
| int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen); |
| void rds_rdma_drop_keys(struct rds_sock *rs); |
| int rds_rdma_extra_size(struct rds_rdma_args *args); |
| int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, |
| struct cmsghdr *cmsg); |
| int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm, |
| struct cmsghdr *cmsg); |
| int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, |
| struct cmsghdr *cmsg); |
| int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm, |
| struct cmsghdr *cmsg); |
| void rds_rdma_free_op(struct rm_rdma_op *ro); |
| void rds_atomic_free_op(struct rm_atomic_op *ao); |
| void rds_rdma_send_complete(struct rds_message *rm, int wc_status); |
| void rds_atomic_send_complete(struct rds_message *rm, int wc_status); |
| int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm, |
| struct cmsghdr *cmsg); |
| |
| extern void __rds_put_mr_final(struct rds_mr *mr); |
| static inline void rds_mr_put(struct rds_mr *mr) |
| { |
| if (atomic_dec_and_test(&mr->r_refcount)) |
| __rds_put_mr_final(mr); |
| } |
| |
| /* stats.c */ |
| DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats); |
| #define rds_stats_inc_which(which, member) do { \ |
| per_cpu(which, get_cpu()).member++; \ |
| put_cpu(); \ |
| } while (0) |
| #define rds_stats_inc(member) rds_stats_inc_which(rds_stats, member) |
| #define rds_stats_add_which(which, member, count) do { \ |
| per_cpu(which, get_cpu()).member += count; \ |
| put_cpu(); \ |
| } while (0) |
| #define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count) |
| int __init rds_stats_init(void); |
| void rds_stats_exit(void); |
| void rds_stats_info_copy(struct rds_info_iterator *iter, |
| uint64_t *values, const char *const *names, |
| size_t nr); |
| |
| /* sysctl.c */ |
| int __init rds_sysctl_init(void); |
| void rds_sysctl_exit(void); |
| extern unsigned long rds_sysctl_sndbuf_min; |
| extern unsigned long rds_sysctl_sndbuf_default; |
| extern unsigned long rds_sysctl_sndbuf_max; |
| extern unsigned long rds_sysctl_reconnect_min_jiffies; |
| extern unsigned long rds_sysctl_reconnect_max_jiffies; |
| extern unsigned int rds_sysctl_max_unacked_packets; |
| extern unsigned int rds_sysctl_max_unacked_bytes; |
| extern unsigned int rds_sysctl_ping_enable; |
| extern unsigned long rds_sysctl_trace_flags; |
| extern unsigned int rds_sysctl_trace_level; |
| |
| /* threads.c */ |
| int __init rds_threads_init(void); |
| void rds_threads_exit(void); |
| extern struct workqueue_struct *rds_wq; |
| void rds_queue_reconnect(struct rds_connection *conn); |
| void rds_connect_worker(struct work_struct *); |
| void rds_shutdown_worker(struct work_struct *); |
| void rds_send_worker(struct work_struct *); |
| void rds_recv_worker(struct work_struct *); |
| void rds_connect_complete(struct rds_connection *conn); |
| |
| /* transport.c */ |
| int rds_trans_register(struct rds_transport *trans); |
| void rds_trans_unregister(struct rds_transport *trans); |
| struct rds_transport *rds_trans_get_preferred(__be32 addr); |
| unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter, |
| unsigned int avail); |
| int __init rds_trans_init(void); |
| void rds_trans_exit(void); |
| |
| #endif |