--- /dev/null
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ *
+ * Author: Zach Brown <zab@zabbo.net>
+ * Author: Peter J. Braam <braam@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
+ * Author: Eric Barton <eric@bartonsoftware.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org
+ *
+ * Portals is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Portals is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Portals; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#define DEBUG_PORTAL_ALLOC
+#define DEBUG_SUBSYSTEM S_LND
+
+#include "socklnd_lib-linux.h"
+
+#include "../../../include/linux/libcfs/libcfs.h"
+#include "../../../include/linux/lnet/lnet.h"
+#include "../../../include/linux/lnet/lib-lnet.h"
+#include "../../../include/linux/lnet/socklnd.h"
+#include "../../../include/linux/lnet/lnet-sysctl.h"
+
+#define SOCKNAL_PEER_HASH_SIZE 101 /* # peer lists */
+#define SOCKNAL_RESCHED 100 /* # scheduler loops before reschedule */
+#define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */
+#define SOCKNAL_ENOMEM_RETRY CFS_TICK /* jiffies between retries */
+
+#define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
+#define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
+
+#define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
+
+/* risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
+ * no risk if we're not running on a CONFIG_HIGHMEM platform. */
+#ifdef CONFIG_HIGHMEM
+# define SOCKNAL_RISK_KMAP_DEADLOCK 0
+#else
+# define SOCKNAL_RISK_KMAP_DEADLOCK 1
+#endif
+
+struct ksock_sched_info;
+
+typedef struct /* per scheduler state */
+{
+ spinlock_t kss_lock; /* serialise */
+ struct list_head kss_rx_conns; /* conn waiting to be read */
+ /* conn waiting to be written */
+ struct list_head kss_tx_conns;
+ /* zombie noop tx list */
+ struct list_head kss_zombie_noop_txs;
+ wait_queue_head_t kss_waitq; /* where scheduler sleeps */
+ /* # connections assigned to this scheduler */
+ int kss_nconns;
+ struct ksock_sched_info *kss_info; /* owner of it */
+ struct page *kss_rx_scratch_pgs[LNET_MAX_IOV];
+ struct kvec kss_scratch_iov[LNET_MAX_IOV];
+} ksock_sched_t;
+
+struct ksock_sched_info {
+ int ksi_nthreads_max; /* max allowed threads */
+ int ksi_nthreads; /* number of threads */
+ int ksi_cpt; /* CPT id */
+ ksock_sched_t *ksi_scheds; /* array of schedulers */
+};
+
+#define KSOCK_CPT_SHIFT 16
+#define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
+#define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
+#define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
+
+typedef struct /* in-use interface */
+{
+ __u32 ksni_ipaddr; /* interface's IP address */
+ __u32 ksni_netmask; /* interface's network mask */
+ int ksni_nroutes; /* # routes using (active) */
+ int ksni_npeers; /* # peers using (passive) */
+ char ksni_name[IFNAMSIZ]; /* interface name */
+} ksock_interface_t;
+
+typedef struct {
+ /* "stuck" socket timeout (seconds) */
+ int *ksnd_timeout;
+ /* # scheduler threads in each pool while starting */
+ int *ksnd_nscheds;
+ int *ksnd_nconnds; /* # connection daemons */
+ int *ksnd_nconnds_max; /* max # connection daemons */
+ int *ksnd_min_reconnectms; /* first connection retry after (ms)... */
+ int *ksnd_max_reconnectms; /* ...exponentially increasing to this */
+ int *ksnd_eager_ack; /* make TCP ack eagerly? */
+ int *ksnd_typed_conns; /* drive sockets by type? */
+ int *ksnd_min_bulk; /* smallest "large" message */
+ int *ksnd_tx_buffer_size; /* socket tx buffer size */
+ int *ksnd_rx_buffer_size; /* socket rx buffer size */
+ int *ksnd_nagle; /* enable NAGLE? */
+ int *ksnd_round_robin; /* round robin for multiple interfaces */
+ int *ksnd_keepalive; /* # secs for sending keepalive NOOP */
+ int *ksnd_keepalive_idle; /* # idle secs before 1st probe */
+ int *ksnd_keepalive_count; /* # probes */
+ int *ksnd_keepalive_intvl; /* time between probes */
+ int *ksnd_credits; /* # concurrent sends */
+ int *ksnd_peertxcredits; /* # concurrent sends to 1 peer */
+ int *ksnd_peerrtrcredits; /* # per-peer router buffer credits */
+ int *ksnd_peertimeout; /* seconds to consider peer dead */
+ int *ksnd_enable_csum; /* enable check sum */
+ int *ksnd_inject_csum_error; /* set non-zero to inject checksum error */
+ int *ksnd_nonblk_zcack; /* always send zc-ack on non-blocking connection */
+ unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload size */
+ int *ksnd_zc_recv; /* enable ZC receive (for Chelsio TOE) */
+ int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to enable ZC receive */
+} ksock_tunables_t;
+
+typedef struct {
+ __u64 ksnn_incarnation; /* my epoch */
+ spinlock_t ksnn_lock; /* serialise */
+ struct list_head ksnn_list; /* chain on global list */
+ int ksnn_npeers; /* # peers */
+ int ksnn_shutdown; /* shutting down? */
+ int ksnn_ninterfaces; /* IP interfaces */
+ ksock_interface_t ksnn_interfaces[LNET_MAX_INTERFACES];
+} ksock_net_t;
+
+/** connd timeout */
+#define SOCKNAL_CONND_TIMEOUT 120
+/** reserved thread for accepting & creating new connd */
+#define SOCKNAL_CONND_RESV 1
+
+typedef struct {
+ int ksnd_init; /* initialisation state */
+ int ksnd_nnets; /* # networks set up */
+ struct list_head ksnd_nets; /* list of nets */
+ /* stabilize peer/conn ops */
+ rwlock_t ksnd_global_lock;
+ /* hash table of all my known peers */
+ struct list_head *ksnd_peers;
+ int ksnd_peer_hash_size; /* size of ksnd_peers */
+
+ int ksnd_nthreads; /* # live threads */
+ int ksnd_shuttingdown; /* tell threads to exit */
+ /* schedulers information */
+ struct ksock_sched_info **ksnd_sched_info;
+
+ atomic_t ksnd_nactive_txs; /* #active txs */
+
+ struct list_head ksnd_deathrow_conns; /* conns to close: reaper_lock*/
+ struct list_head ksnd_zombie_conns; /* conns to free: reaper_lock */
+ struct list_head ksnd_enomem_conns; /* conns to retry: reaper_lock*/
+ wait_queue_head_t ksnd_reaper_waitq; /* reaper sleeps here */
+ unsigned long ksnd_reaper_waketime;/* when reaper will wake */
+ spinlock_t ksnd_reaper_lock; /* serialise */
+
+ int ksnd_enomem_tx; /* test ENOMEM sender */
+ int ksnd_stall_tx; /* test sluggish sender */
+ int ksnd_stall_rx; /* test sluggish receiver */
+
+ struct list_head ksnd_connd_connreqs; /* incoming connection requests */
+ struct list_head ksnd_connd_routes; /* routes waiting to be connected */
+ wait_queue_head_t ksnd_connd_waitq; /* connds sleep here */
+ int ksnd_connd_connecting;/* # connds connecting */
+ /** time stamp of the last failed connecting attempt */
+ long ksnd_connd_failed_stamp;
+ /** # starting connd */
+ unsigned ksnd_connd_starting;
+ /** time stamp of the last starting connd */
+ long ksnd_connd_starting_stamp;
+ /** # running connd */
+ unsigned ksnd_connd_running;
+ spinlock_t ksnd_connd_lock; /* serialise */
+
+ struct list_head ksnd_idle_noop_txs; /* list head for freed noop tx */
+ spinlock_t ksnd_tx_lock; /* serialise, g_lock unsafe */
+
+} ksock_nal_data_t;
+
+#define SOCKNAL_INIT_NOTHING 0
+#define SOCKNAL_INIT_DATA 1
+#define SOCKNAL_INIT_ALL 2
+
+/* A packet just assembled for transmission is represented by 1 or more
+ * struct iovec fragments (the first frag contains the portals header),
+ * followed by 0 or more lnet_kiov_t fragments.
+ *
+ * On the receive side, initially 1 struct iovec fragment is posted for
+ * receive (the header). Once the header has been received, the payload is
+ * received into either struct iovec or lnet_kiov_t fragments, depending on
+ * what the header matched or whether the message needs forwarding. */
+
+struct ksock_conn; /* forward ref */
+struct ksock_peer; /* forward ref */
+struct ksock_route; /* forward ref */
+struct ksock_proto; /* forward ref */
+
+typedef struct /* transmit packet */
+{
+ struct list_head tx_list; /* queue on conn for transmission etc */
+ struct list_head tx_zc_list; /* queue on peer for ZC request */
+ atomic_t tx_refcount; /* tx reference count */
+ int tx_nob; /* # packet bytes */
+ int tx_resid; /* residual bytes */
+ int tx_niov; /* # packet iovec frags */
+ struct kvec *tx_iov; /* packet iovec frags */
+ int tx_nkiov; /* # packet page frags */
+ unsigned short tx_zc_aborted; /* aborted ZC request */
+ unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
+ unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
+ unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
+ lnet_kiov_t *tx_kiov; /* packet page frags */
+ struct ksock_conn *tx_conn; /* owning conn */
+ lnet_msg_t *tx_lnetmsg; /* lnet message for lnet_finalize() */
+ unsigned long tx_deadline; /* when (in jiffies) tx times out */
+ ksock_msg_t tx_msg; /* socklnd message buffer */
+ int tx_desc_size; /* size of this descriptor */
+ union {
+ struct {
+ struct kvec iov; /* virt hdr */
+ lnet_kiov_t kiov[0]; /* paged payload */
+ } paged;
+ struct {
+ struct kvec iov[1]; /* virt hdr + payload */
+ } virt;
+ } tx_frags;
+} ksock_tx_t;
+
+#define KSOCK_NOOP_TX_SIZE ((int)offsetof(ksock_tx_t, tx_frags.paged.kiov[0]))
+
+/* network zero copy callback descriptor embedded in ksock_tx_t */
+
+/* space for the rx frag descriptors; we either read a single contiguous
+ * header, or up to LNET_MAX_IOV frags of payload of either type. */
+typedef union {
+ struct kvec iov[LNET_MAX_IOV];
+ lnet_kiov_t kiov[LNET_MAX_IOV];
+} ksock_rxiovspace_t;
+
+#define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
+#define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
+#define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
+#define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
+#define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
+#define SOCKNAL_RX_SLOP 6 /* skipping body */
+
+typedef struct ksock_conn {
+ struct ksock_peer *ksnc_peer; /* owning peer */
+ struct ksock_route *ksnc_route; /* owning route */
+ struct list_head ksnc_list; /* stash on peer's conn list */
+ struct socket *ksnc_sock; /* actual socket */
+ void *ksnc_saved_data_ready; /* socket's original data_ready() callback */
+ void *ksnc_saved_write_space; /* socket's original write_space() callback */
+ atomic_t ksnc_conn_refcount; /* conn refcount */
+ atomic_t ksnc_sock_refcount; /* sock refcount */
+ ksock_sched_t *ksnc_scheduler; /* who schedules this connection */
+ __u32 ksnc_myipaddr; /* my IP */
+ __u32 ksnc_ipaddr; /* peer's IP */
+ int ksnc_port; /* peer's port */
+ signed int ksnc_type:3; /* type of connection,
+ * should be signed value */
+ unsigned int ksnc_closing:1; /* being shut down */
+ unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
+ unsigned int ksnc_zc_capable:1; /* enable to ZC */
+ struct ksock_proto *ksnc_proto; /* protocol for the connection */
+
+ /* reader */
+ struct list_head ksnc_rx_list; /* where I enq waiting input or a forwarding descriptor */
+ unsigned long ksnc_rx_deadline; /* when (in jiffies) receive times out */
+ __u8 ksnc_rx_started; /* started receiving a message */
+ __u8 ksnc_rx_ready; /* data ready to read */
+ __u8 ksnc_rx_scheduled;/* being progressed */
+ __u8 ksnc_rx_state; /* what is being read */
+ int ksnc_rx_nob_left; /* # bytes to next hdr/body */
+ int ksnc_rx_nob_wanted; /* bytes actually wanted */
+ int ksnc_rx_niov; /* # iovec frags */
+ struct kvec *ksnc_rx_iov; /* the iovec frags */
+ int ksnc_rx_nkiov; /* # page frags */
+ lnet_kiov_t *ksnc_rx_kiov; /* the page frags */
+ ksock_rxiovspace_t ksnc_rx_iov_space;/* space for frag descriptors */
+ __u32 ksnc_rx_csum; /* partial checksum for incoming data */
+ void *ksnc_cookie; /* rx lnet_finalize passthru arg */
+ ksock_msg_t ksnc_msg; /* incoming message buffer:
+ * V2.x message takes the
+ * whole struct
+ * V1.x message is a bare
+ * lnet_hdr_t, it's stored in
+ * ksnc_msg.ksm_u.lnetmsg */
+
+ /* WRITER */
+ struct list_head ksnc_tx_list; /* where I enq waiting for output space */
+ struct list_head ksnc_tx_queue; /* packets waiting to be sent */
+ ksock_tx_t *ksnc_tx_carrier; /* next TX that can carry a LNet message or ZC-ACK */
+ unsigned long ksnc_tx_deadline; /* when (in jiffies) tx times out */
+ int ksnc_tx_bufnob; /* send buffer marker */
+ atomic_t ksnc_tx_nob; /* # bytes queued */
+ int ksnc_tx_ready; /* write space */
+ int ksnc_tx_scheduled; /* being progressed */
+ unsigned long ksnc_tx_last_post; /* time stamp of the last posted TX */
+} ksock_conn_t;
+
+typedef struct ksock_route {
+ struct list_head ksnr_list; /* chain on peer route list */
+ struct list_head ksnr_connd_list; /* chain on ksnr_connd_routes */
+ struct ksock_peer *ksnr_peer; /* owning peer */
+ atomic_t ksnr_refcount; /* # users */
+ unsigned long ksnr_timeout; /* when (in jiffies) reconnection can happen next */
+ long ksnr_retry_interval; /* how long between retries */
+ __u32 ksnr_myipaddr; /* my IP */
+ __u32 ksnr_ipaddr; /* IP address to connect to */
+ int ksnr_port; /* port to connect to */
+ unsigned int ksnr_scheduled:1; /* scheduled for attention */
+ unsigned int ksnr_connecting:1;/* connection establishment in progress */
+ unsigned int ksnr_connected:4; /* connections established by type */
+ unsigned int ksnr_deleted:1; /* been removed from peer? */
+ unsigned int ksnr_share_count; /* created explicitly? */
+ int ksnr_conn_count; /* # conns established by this route */
+} ksock_route_t;
+
+#define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
+
+typedef struct ksock_peer {
+ struct list_head ksnp_list; /* stash on global peer list */
+ unsigned long ksnp_last_alive; /* when (in jiffies) I was last alive */
+ lnet_process_id_t ksnp_id; /* who's on the other end(s) */
+ atomic_t ksnp_refcount; /* # users */
+ int ksnp_sharecount; /* lconf usage counter */
+ int ksnp_closing; /* being closed */
+ int ksnp_accepting;/* # passive connections pending */
+ int ksnp_error; /* errno on closing last conn */
+ __u64 ksnp_zc_next_cookie;/* ZC completion cookie */
+ __u64 ksnp_incarnation; /* latest known peer incarnation */
+ struct ksock_proto *ksnp_proto; /* latest known peer protocol */
+ struct list_head ksnp_conns; /* all active connections */
+ struct list_head ksnp_routes; /* routes */
+ struct list_head ksnp_tx_queue; /* waiting packets */
+ spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
+ struct list_head ksnp_zc_req_list; /* zero copy requests wait for ACK */
+ unsigned long ksnp_send_keepalive; /* time to send keepalive */
+ lnet_ni_t *ksnp_ni; /* which network */
+ int ksnp_n_passive_ips; /* # of... */
+ __u32 ksnp_passive_ips[LNET_MAX_INTERFACES]; /* preferred local interfaces */
+} ksock_peer_t;
+
+typedef struct ksock_connreq {
+ struct list_head ksncr_list; /* stash on ksnd_connd_connreqs */
+ lnet_ni_t *ksncr_ni; /* chosen NI */
+ struct socket *ksncr_sock; /* accepted socket */
+} ksock_connreq_t;
+
+extern ksock_nal_data_t ksocknal_data;
+extern ksock_tunables_t ksocknal_tunables;
+
+#define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
+#define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
+#define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
+
+typedef struct ksock_proto {
+ int pro_version; /* version number of protocol */
+ int (*pro_send_hello)(ksock_conn_t *, ksock_hello_msg_t *); /* handshake function */
+ int (*pro_recv_hello)(ksock_conn_t *, ksock_hello_msg_t *, int);/* handshake function */
+ void (*pro_pack)(ksock_tx_t *); /* message pack */
+ void (*pro_unpack)(ksock_msg_t *); /* message unpack */
+ ksock_tx_t *(*pro_queue_tx_msg)(ksock_conn_t *, ksock_tx_t *); /* queue tx on the connection */
+ int (*pro_queue_tx_zcack)(ksock_conn_t *, ksock_tx_t *, __u64); /* queue ZC ack on the connection */
+ int (*pro_handle_zcreq)(ksock_conn_t *, __u64, int); /* handle ZC request */
+ int (*pro_handle_zcack)(ksock_conn_t *, __u64, __u64); /* handle ZC ACK */
+ int (*pro_match_tx)(ksock_conn_t *, ksock_tx_t *, int); /* msg type matches the connection type:
+ * return value:
+ * return MATCH_NO : no
+ * return MATCH_YES : matching type
+ * return MATCH_MAY : can be backup */
+} ksock_proto_t;
+
+extern ksock_proto_t ksocknal_protocol_v1x;
+extern ksock_proto_t ksocknal_protocol_v2x;
+extern ksock_proto_t ksocknal_protocol_v3x;
+
+#define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
+#define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
+#define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
+
+#ifndef CPU_MASK_NONE
+#define CPU_MASK_NONE 0UL
+#endif
+
+static inline int
+ksocknal_route_mask(void)
+{
+ if (!*ksocknal_tunables.ksnd_typed_conns)
+ return (1 << SOCKLND_CONN_ANY);
+
+ return ((1 << SOCKLND_CONN_CONTROL) |
+ (1 << SOCKLND_CONN_BULK_IN) |
+ (1 << SOCKLND_CONN_BULK_OUT));
+}
+
+static inline struct list_head *
+ksocknal_nid2peerlist(lnet_nid_t nid)
+{
+ unsigned int hash = ((unsigned int)nid) % ksocknal_data.ksnd_peer_hash_size;
+
+ return &ksocknal_data.ksnd_peers[hash];
+}
+
+static inline void
+ksocknal_conn_addref(ksock_conn_t *conn)
+{
+ LASSERT(atomic_read(&conn->ksnc_conn_refcount) > 0);
+ atomic_inc(&conn->ksnc_conn_refcount);
+}
+
+extern void ksocknal_queue_zombie_conn(ksock_conn_t *conn);
+extern void ksocknal_finalize_zcreq(ksock_conn_t *conn);
+
+static inline void
+ksocknal_conn_decref(ksock_conn_t *conn)
+{
+ LASSERT(atomic_read(&conn->ksnc_conn_refcount) > 0);
+ if (atomic_dec_and_test(&conn->ksnc_conn_refcount))
+ ksocknal_queue_zombie_conn(conn);
+}
+
+static inline int
+ksocknal_connsock_addref(ksock_conn_t *conn)
+{
+ int rc = -ESHUTDOWN;
+
+ read_lock(&ksocknal_data.ksnd_global_lock);
+ if (!conn->ksnc_closing) {
+ LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0);
+ atomic_inc(&conn->ksnc_sock_refcount);
+ rc = 0;
+ }
+ read_unlock(&ksocknal_data.ksnd_global_lock);
+
+ return rc;
+}
+
+static inline void
+ksocknal_connsock_decref(ksock_conn_t *conn)
+{
+ LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0);
+ if (atomic_dec_and_test(&conn->ksnc_sock_refcount)) {
+ LASSERT(conn->ksnc_closing);
+ libcfs_sock_release(conn->ksnc_sock);
+ conn->ksnc_sock = NULL;
+ ksocknal_finalize_zcreq(conn);
+ }
+}
+
+static inline void
+ksocknal_tx_addref(ksock_tx_t *tx)
+{
+ LASSERT(atomic_read(&tx->tx_refcount) > 0);
+ atomic_inc(&tx->tx_refcount);
+}
+
+extern void ksocknal_tx_prep(ksock_conn_t *, ksock_tx_t *tx);
+extern void ksocknal_tx_done(lnet_ni_t *ni, ksock_tx_t *tx);
+
+static inline void
+ksocknal_tx_decref(ksock_tx_t *tx)
+{
+ LASSERT(atomic_read(&tx->tx_refcount) > 0);
+ if (atomic_dec_and_test(&tx->tx_refcount))
+ ksocknal_tx_done(NULL, tx);
+}
+
+static inline void
+ksocknal_route_addref(ksock_route_t *route)
+{
+ LASSERT(atomic_read(&route->ksnr_refcount) > 0);
+ atomic_inc(&route->ksnr_refcount);
+}
+
+extern void ksocknal_destroy_route(ksock_route_t *route);
+
+static inline void
+ksocknal_route_decref(ksock_route_t *route)
+{
+ LASSERT(atomic_read(&route->ksnr_refcount) > 0);
+ if (atomic_dec_and_test(&route->ksnr_refcount))
+ ksocknal_destroy_route(route);
+}
+
+static inline void
+ksocknal_peer_addref(ksock_peer_t *peer)
+{
+ LASSERT(atomic_read(&peer->ksnp_refcount) > 0);
+ atomic_inc(&peer->ksnp_refcount);
+}
+
+extern void ksocknal_destroy_peer(ksock_peer_t *peer);
+
+static inline void
+ksocknal_peer_decref(ksock_peer_t *peer)
+{
+ LASSERT(atomic_read(&peer->ksnp_refcount) > 0);
+ if (atomic_dec_and_test(&peer->ksnp_refcount))
+ ksocknal_destroy_peer(peer);
+}
+
+int ksocknal_startup(lnet_ni_t *ni);
+void ksocknal_shutdown(lnet_ni_t *ni);
+int ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
+int ksocknal_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
+int ksocknal_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
+ int delayed, unsigned int niov,
+ struct kvec *iov, lnet_kiov_t *kiov,
+ unsigned int offset, unsigned int mlen, unsigned int rlen);
+int ksocknal_accept(lnet_ni_t *ni, struct socket *sock);
+
+extern int ksocknal_add_peer(lnet_ni_t *ni, lnet_process_id_t id, __u32 ip, int port);
+extern ksock_peer_t *ksocknal_find_peer_locked(lnet_ni_t *ni, lnet_process_id_t id);
+extern ksock_peer_t *ksocknal_find_peer(lnet_ni_t *ni, lnet_process_id_t id);
+extern void ksocknal_peer_failed(ksock_peer_t *peer);
+extern int ksocknal_create_conn(lnet_ni_t *ni, ksock_route_t *route,
+ struct socket *sock, int type);
+extern void ksocknal_close_conn_locked(ksock_conn_t *conn, int why);
+extern void ksocknal_terminate_conn(ksock_conn_t *conn);
+extern void ksocknal_destroy_conn(ksock_conn_t *conn);
+extern int ksocknal_close_peer_conns_locked(ksock_peer_t *peer,
+ __u32 ipaddr, int why);
+extern int ksocknal_close_conn_and_siblings(ksock_conn_t *conn, int why);
+extern int ksocknal_close_matching_conns(lnet_process_id_t id, __u32 ipaddr);
+extern ksock_conn_t *ksocknal_find_conn_locked(ksock_peer_t *peer,
+ ksock_tx_t *tx, int nonblk);
+
+extern int ksocknal_launch_packet(lnet_ni_t *ni, ksock_tx_t *tx,
+ lnet_process_id_t id);
+extern ksock_tx_t *ksocknal_alloc_tx(int type, int size);
+extern void ksocknal_free_tx(ksock_tx_t *tx);
+extern ksock_tx_t *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
+extern void ksocknal_next_tx_carrier(ksock_conn_t *conn);
+extern void ksocknal_queue_tx_locked(ksock_tx_t *tx, ksock_conn_t *conn);
+extern void ksocknal_txlist_done(lnet_ni_t *ni, struct list_head *txlist,
+ int error);
+extern void ksocknal_notify(lnet_ni_t *ni, lnet_nid_t gw_nid, int alive);
+extern void ksocknal_query(struct lnet_ni *ni, lnet_nid_t nid, unsigned long *when);
+extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
+extern void ksocknal_thread_fini(void);
+extern void ksocknal_launch_all_connections_locked(ksock_peer_t *peer);
+extern ksock_route_t *ksocknal_find_connectable_route_locked(ksock_peer_t *peer);
+extern ksock_route_t *ksocknal_find_connecting_route_locked(ksock_peer_t *peer);
+extern int ksocknal_new_packet(ksock_conn_t *conn, int skip);
+extern int ksocknal_scheduler(void *arg);
+extern int ksocknal_connd(void *arg);
+extern int ksocknal_reaper(void *arg);
+extern int ksocknal_send_hello(lnet_ni_t *ni, ksock_conn_t *conn,
+ lnet_nid_t peer_nid, ksock_hello_msg_t *hello);
+extern int ksocknal_recv_hello(lnet_ni_t *ni, ksock_conn_t *conn,
+ ksock_hello_msg_t *hello, lnet_process_id_t *id,
+ __u64 *incarnation);
+extern void ksocknal_read_callback(ksock_conn_t *conn);
+extern void ksocknal_write_callback(ksock_conn_t *conn);
+
+extern int ksocknal_lib_zc_capable(ksock_conn_t *conn);
+extern void ksocknal_lib_save_callback(struct socket *sock, ksock_conn_t *conn);
+extern void ksocknal_lib_set_callback(struct socket *sock, ksock_conn_t *conn);
+extern void ksocknal_lib_reset_callback(struct socket *sock, ksock_conn_t *conn);
+extern void ksocknal_lib_push_conn(ksock_conn_t *conn);
+extern int ksocknal_lib_get_conn_addrs(ksock_conn_t *conn);
+extern int ksocknal_lib_setup_sock(struct socket *so);
+extern int ksocknal_lib_send_iov(ksock_conn_t *conn, ksock_tx_t *tx);
+extern int ksocknal_lib_send_kiov(ksock_conn_t *conn, ksock_tx_t *tx);
+extern void ksocknal_lib_eager_ack(ksock_conn_t *conn);
+extern int ksocknal_lib_recv_iov(ksock_conn_t *conn);
+extern int ksocknal_lib_recv_kiov(ksock_conn_t *conn);
+extern int ksocknal_lib_get_conn_tunables(ksock_conn_t *conn, int *txmem,
+ int *rxmem, int *nagle);
+
+extern int ksocknal_tunables_init(void);
+
+extern void ksocknal_lib_csum_tx(ksock_tx_t *tx);
+
+extern int ksocknal_lib_memory_pressure(ksock_conn_t *conn);
+extern int ksocknal_lib_bind_thread_to_cpu(int id);
Code Review / kvmfornfv.git / blobdiff