* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2016, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*
* lnet/include/lnet/lib-types.h
*
#include <linux/kthread.h>
#include <linux/uio.h>
+#include <linux/semaphore.h>
#include <linux/types.h>
+#include <linux/kref.h>
#include <uapi/linux/lnet/lnet-dlc.h>
#include <uapi/linux/lnet/lnetctl.h>
+#include <uapi/linux/lnet/nidstr.h>
/* Max payload size */
-#ifndef CONFIG_LNET_MAX_PAYLOAD
-# error "CONFIG_LNET_MAX_PAYLOAD must be defined in config.h"
-#endif
+#define LNET_MAX_PAYLOAD LNET_MTU
-#define LNET_MAX_PAYLOAD CONFIG_LNET_MAX_PAYLOAD
-#if (LNET_MAX_PAYLOAD < LNET_MTU)
-# error "LNET_MAX_PAYLOAD too small - error in configure --with-max-payload-mb"
-#elif (LNET_MAX_PAYLOAD > (PAGE_SIZE * LNET_MAX_IOV))
-# error "LNET_MAX_PAYLOAD too large - error in configure --with-max-payload-mb"
-#endif
+/** limit on the number of fragments in discontiguous MDs */
+#define LNET_MAX_IOV 256
+
+/*
+ * This is the maximum health value.
+ * All local and peer NIs created have their health default to this value.
+ */
+#define LNET_MAX_HEALTH_VALUE 1000
+#define LNET_MAX_SELECTION_PRIORITY UINT_MAX
/* forward refs */
struct lnet_libmd;
-typedef struct lnet_msg {
+enum lnet_msg_hstatus {
+ LNET_MSG_STATUS_OK = 0,
+ LNET_MSG_STATUS_LOCAL_INTERRUPT,
+ LNET_MSG_STATUS_LOCAL_DROPPED,
+ LNET_MSG_STATUS_LOCAL_ABORTED,
+ LNET_MSG_STATUS_LOCAL_NO_ROUTE,
+ LNET_MSG_STATUS_LOCAL_ERROR,
+ LNET_MSG_STATUS_LOCAL_TIMEOUT,
+ LNET_MSG_STATUS_REMOTE_ERROR,
+ LNET_MSG_STATUS_REMOTE_DROPPED,
+ LNET_MSG_STATUS_REMOTE_TIMEOUT,
+ LNET_MSG_STATUS_NETWORK_TIMEOUT,
+ LNET_MSG_STATUS_END,
+};
+
+struct lnet_rsp_tracker {
+ /* chain on the waiting list */
+ struct list_head rspt_on_list;
+ /* cpt to lock */
+ int rspt_cpt;
+ /* nid of next hop */
+ lnet_nid_t rspt_next_hop_nid;
+ /* deadline of the REPLY/ACK */
+ ktime_t rspt_deadline;
+ /* parent MD */
+ struct lnet_handle_md rspt_mdh;
+};
+
+struct lnet_msg {
struct list_head msg_activelist;
struct list_head msg_list; /* Q for credits/MD */
lnet_nid_t msg_from;
__u32 msg_type;
+ /*
+ * hold parameters in case message is with held due
+ * to discovery
+ */
+ lnet_nid_t msg_src_nid_param;
+ lnet_nid_t msg_rtr_nid_param;
+
+ /*
+ * Deadline for the message after which it will be finalized if it
+ * has not completed.
+ */
+ ktime_t msg_deadline;
+
+ /* The message health status. */
+ enum lnet_msg_hstatus msg_health_status;
+ /* This is a recovery message */
+ bool msg_recovery;
+ /* the number of times a transmission has been retried */
+ int msg_retry_count;
+ /* flag to indicate that we do not want to resend this message */
+ bool msg_no_resend;
+
/* committed for sending */
unsigned int msg_tx_committed:1;
/* CPT # this message committed for sending */
unsigned int msg_wanted;
unsigned int msg_offset;
unsigned int msg_niov;
- struct kvec *msg_iov;
- lnet_kiov_t *msg_kiov;
+ struct bio_vec *msg_kiov;
struct lnet_event msg_ev;
struct lnet_hdr msg_hdr;
-} lnet_msg_t;
+};
-typedef struct lnet_libhandle {
+struct lnet_libhandle {
struct list_head lh_hash_chain;
__u64 lh_cookie;
-} lnet_libhandle_t;
+};
#define lh_entry(ptr, type, member) \
((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
-typedef struct lnet_eq {
- struct list_head eq_list;
- struct lnet_libhandle eq_lh;
- unsigned long eq_enq_seq;
- unsigned long eq_deq_seq;
- unsigned int eq_size;
- lnet_eq_handler_t eq_callback;
- struct lnet_event *eq_events;
- int **eq_refs; /* percpt refcount for EQ */
-} lnet_eq_t;
-
-typedef struct lnet_me {
+struct lnet_me {
struct list_head me_list;
- struct lnet_libhandle me_lh;
+ int me_cpt;
struct lnet_process_id me_match_id;
unsigned int me_portal;
unsigned int me_pos; /* hash offset in mt_hash */
__u64 me_ignore_bits;
enum lnet_unlink me_unlink;
struct lnet_libmd *me_md;
-} lnet_me_t;
-
-typedef struct lnet_libmd {
- struct list_head md_list;
- struct lnet_libhandle md_lh;
- struct lnet_me *md_me;
- char *md_start;
- unsigned int md_offset;
- unsigned int md_length;
- unsigned int md_max_size;
- int md_threshold;
- int md_refcount;
- unsigned int md_options;
- unsigned int md_flags;
- unsigned int md_niov; /* # frags at end of struct */
- void *md_user_ptr;
- struct lnet_eq *md_eq;
- struct lnet_handle_md md_bulk_handle;
- union {
- struct kvec iov[LNET_MAX_IOV];
- lnet_kiov_t kiov[LNET_MAX_IOV];
- } md_iov;
-} lnet_libmd_t;
+};
+
+struct lnet_libmd {
+ struct list_head md_list;
+ struct lnet_libhandle md_lh;
+ struct lnet_me *md_me;
+ char *md_start;
+ unsigned int md_offset;
+ unsigned int md_length;
+ unsigned int md_max_size;
+ int md_threshold;
+ int md_refcount;
+ unsigned int md_options;
+ unsigned int md_flags;
+ unsigned int md_niov; /* # frags at end of struct */
+ void *md_user_ptr;
+ struct lnet_rsp_tracker *md_rspt_ptr;
+ lnet_handler_t md_handler;
+ struct lnet_handle_md md_bulk_handle;
+ struct bio_vec md_kiov[LNET_MAX_IOV];
+};
-#define LNET_MD_FLAG_ZOMBIE (1 << 0)
-#define LNET_MD_FLAG_AUTO_UNLINK (1 << 1)
-#define LNET_MD_FLAG_ABORTED (1 << 2)
+#define LNET_MD_FLAG_ZOMBIE BIT(0)
+#define LNET_MD_FLAG_AUTO_UNLINK BIT(1)
+#define LNET_MD_FLAG_ABORTED BIT(2)
+/* LNET_MD_FLAG_HANDLING is set when a non-unlink event handler
+ * is being called for an event relating to the md.
+ * It ensures only one such handler runs at a time.
+ * The final "unlink" event is only called once the
+ * md_refcount has reached zero, and this flag has been cleared,
+ * ensuring that it doesn't race with any other event handler
+ * call.
+ */
+#define LNET_MD_FLAG_HANDLING BIT(3)
+#define LNET_MD_FLAG_DISCARD BIT(4)
-typedef struct lnet_test_peer {
+struct lnet_test_peer {
/* info about peers we are trying to fail */
struct list_head tp_list; /* ln_test_peers */
lnet_nid_t tp_nid; /* matching nid */
unsigned int tp_threshold; /* # failures to simulate */
-} lnet_test_peer_t;
+};
#define LNET_COOKIE_TYPE_MD 1
#define LNET_COOKIE_TYPE_ME 2
#define LNET_COOKIE_TYPE_BITS 2
#define LNET_COOKIE_MASK ((1ULL << LNET_COOKIE_TYPE_BITS) - 1ULL)
+struct netstrfns {
+ u32 nf_type;
+ char *nf_name;
+ char *nf_modname;
+ void (*nf_addr2str)(u32 addr, char *str, size_t size);
+ int (*nf_str2addr)(const char *str, int nob, u32 *addr);
+ int (*nf_parse_addrlist)(char *str, int len,
+ struct list_head *list);
+ int (*nf_print_addrlist)(char *buffer, int count,
+ struct list_head *list);
+ int (*nf_match_addr)(u32 addr, struct list_head *list);
+ int (*nf_min_max)(struct list_head *nidlist, u32 *min_nid,
+ u32 *max_nid);
+};
+
struct lnet_ni; /* forward ref */
struct socket;
-typedef struct lnet_lnd {
- /* fields managed by portals */
- struct list_head lnd_list; /* stash in the LND table */
- int lnd_refcount; /* # active instances */
-
+struct lnet_lnd {
/* fields initialized by the LND */
__u32 lnd_type;
int (*lnd_ctl)(struct lnet_ni *ni, unsigned int cmd, void *arg);
/* In data movement APIs below, payload buffers are described as a set
- * of 'niov' fragments which are...
- * EITHER
- * in virtual memory (struct kvec *iov != NULL)
- * OR
- * in pages (kernel only: plt_kiov_t *kiov != NULL).
+ * of 'niov' fragments which are in pages.
* The LND may NOT overwrite these fragment descriptors.
* An 'offset' and may specify a byte offset within the set of
* fragments to start from
* credit if the LND does flow control. */
int (*lnd_recv)(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
int delayed, unsigned int niov,
- struct kvec *iov, lnet_kiov_t *kiov,
+ struct bio_vec *kiov,
unsigned int offset, unsigned int mlen, unsigned int rlen);
/* lnet_parse() has had to delay processing of this message
int (*lnd_eager_recv)(struct lnet_ni *ni, void *private,
struct lnet_msg *msg, void **new_privatep);
- /* notification of peer health */
- void (*lnd_notify)(struct lnet_ni *ni, lnet_nid_t peer, int alive);
-
- /* query of peer aliveness */
- void (*lnd_query)(struct lnet_ni *ni, lnet_nid_t peer, cfs_time_t *when);
+ /* notification of peer down */
+ void (*lnd_notify_peer_down)(lnet_nid_t peer);
/* accept a new connection */
int (*lnd_accept)(struct lnet_ni *ni, struct socket *sock);
-} lnd_t;
-
-typedef struct lnet_ni_status {
- lnet_nid_t ns_nid;
- __u32 ns_status;
- __u32 ns_unused;
-} WIRE_ATTR lnet_ni_status_t;
+};
struct lnet_tx_queue {
int tq_credits; /* # tx credits free */
};
enum lnet_ni_state {
- /* set when NI block is allocated */
+ /* initial state when NI is created */
LNET_NI_STATE_INIT = 0,
- /* set when NI is started successfully */
+ /* set when NI is brought up */
LNET_NI_STATE_ACTIVE,
- /* set when LND notifies NI failed */
- LNET_NI_STATE_FAILED,
- /* set when LND notifies NI degraded */
- LNET_NI_STATE_DEGRADED,
- /* set when shuttding down NI */
- LNET_NI_STATE_DELETING
+ /* set when NI is being shutdown */
+ LNET_NI_STATE_DELETING,
+};
+
+#define LNET_NI_RECOVERY_PENDING BIT(0)
+#define LNET_NI_RECOVERY_FAILED BIT(1)
+
+enum lnet_stats_type {
+ LNET_STATS_TYPE_SEND = 0,
+ LNET_STATS_TYPE_RECV,
+ LNET_STATS_TYPE_DROP
+};
+
+struct lnet_comm_count {
+ atomic_t co_get_count;
+ atomic_t co_put_count;
+ atomic_t co_reply_count;
+ atomic_t co_ack_count;
+ atomic_t co_hello_count;
};
struct lnet_element_stats {
- atomic_t send_count;
- atomic_t recv_count;
- atomic_t drop_count;
+ struct lnet_comm_count el_send_stats;
+ struct lnet_comm_count el_recv_stats;
+ struct lnet_comm_count el_drop_stats;
+};
+
+struct lnet_health_local_stats {
+ atomic_t hlt_local_interrupt;
+ atomic_t hlt_local_dropped;
+ atomic_t hlt_local_aborted;
+ atomic_t hlt_local_no_route;
+ atomic_t hlt_local_timeout;
+ atomic_t hlt_local_error;
+};
+
+struct lnet_health_remote_stats {
+ atomic_t hlt_remote_dropped;
+ atomic_t hlt_remote_timeout;
+ atomic_t hlt_remote_error;
+ atomic_t hlt_network_timeout;
};
struct lnet_net {
* lnet/include/lnet/nidstr.h */
__u32 net_id;
- /* priority of the network */
- __u32 net_prio;
+ /* round robin selection */
+ __u32 net_seq;
/* total number of CPTs in the array */
__u32 net_ncpts;
/* cumulative CPTs of all NIs in this net */
__u32 *net_cpts;
+ /* relative net selection priority */
+ __u32 net_sel_priority;
+
/* network tunables */
struct lnet_ioctl_config_lnd_cmn_tunables net_tunables;
bool net_tunables_set;
/* procedural interface */
- struct lnet_lnd *net_lnd;
+ const struct lnet_lnd *net_lnd;
/* list of NIs on this net */
struct list_head net_ni_list;
/* dying LND instances */
struct list_head net_ni_zombie;
- /* network state */
- enum lnet_net_state net_state;
+ /* when I was last alive */
+ time64_t net_last_alive;
+
+ /* protects access to net_last_alive */
+ spinlock_t net_lock;
+
+ /* list of router nids preferred for this network */
+ struct list_head net_rtr_pref_nids;
};
-typedef struct lnet_ni {
+struct lnet_ni {
/* chain on the lnet_net structure */
struct list_head ni_netlist;
- /* chain on net_ni_cpt */
- struct list_head ni_cptlist;
+ /* chain on the recovery queue */
+ struct list_head ni_recovery;
+
+ /* MD handle for recovery ping */
+ struct lnet_handle_md ni_ping_mdh;
spinlock_t ni_lock;
/* percpt reference count */
int **ni_refs;
- /* when I was last alive */
- long ni_last_alive;
-
/* pointer to parent network */
struct lnet_net *ni_net;
/* my health status */
struct lnet_ni_status *ni_status;
- /* NI FSM */
+ /* NI FSM. Protected by lnet_ni_lock() */
enum lnet_ni_state ni_state;
+ /* Recovery state. Protected by lnet_ni_lock() */
+ __u32 ni_recovery_state;
+
+ /* When to send the next recovery ping */
+ time64_t ni_next_ping;
+ /* How many pings sent during current recovery period did not receive
+ * a reply. NB: reset whenever _any_ message arrives on this NI
+ */
+ unsigned int ni_ping_count;
+
/* per NI LND tunables */
struct lnet_lnd_tunables ni_lnd_tunables;
/* NI statistics */
struct lnet_element_stats ni_stats;
+ struct lnet_health_local_stats ni_hstats;
/* physical device CPT */
int ni_dev_cpt;
__u32 ni_seq;
/*
- * equivalent interfaces to use
- * This is an array because socklnd bonding can still be configured
+ * health value
+ * initialized to LNET_MAX_HEALTH_VALUE
+ * Value is decremented every time we fail to send a message over
+ * this NI because of a NI specific failure.
+ * Value is incremented if we successfully send a message.
*/
- char *ni_interfaces[LNET_NUM_INTERFACES];
+ atomic_t ni_healthv;
+
+ /*
+ * Set to 1 by the LND when it receives an event telling it the device
+ * has gone into a fatal state. Set to 0 when the LND receives an
+ * even telling it the device is back online.
+ */
+ atomic_t ni_fatal_error_on;
+
+ /* the relative selection priority of this NI */
+ __u32 ni_sel_priority;
+
+ /*
+ * equivalent interface to use
+ */
+ char *ni_interface;
struct net *ni_net_ns; /* original net namespace */
-} lnet_ni_t;
+};
#define LNET_PROTO_PING_MATCHBITS 0x8000000000000000LL
-/* NB: value of these features equal to LNET_PROTO_PING_VERSION_x
- * of old LNet, so there shouldn't be any compatibility issue */
-#define LNET_PING_FEAT_INVAL (0) /* no feature */
-#define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
-#define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
-#define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
-
-#define LNET_PING_FEAT_MASK (LNET_PING_FEAT_BASE | \
- LNET_PING_FEAT_NI_STATUS)
-
-typedef struct lnet_ping_info {
- __u32 pi_magic;
- __u32 pi_features;
- lnet_pid_t pi_pid;
- __u32 pi_nnis;
- struct lnet_ni_status pi_ni[0];
-} WIRE_ATTR lnet_ping_info_t;
-
-/* router checker data, per router */
-#define LNET_MAX_RTR_NIS 16
-#define LNET_PINGINFO_SIZE offsetof(struct lnet_ping_info, pi_ni[LNET_MAX_RTR_NIS])
-typedef struct lnet_rc_data {
- /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */
- struct list_head rcd_list;
- struct lnet_handle_md rcd_mdh; /* ping buffer MD */
- struct lnet_peer_ni *rcd_gateway; /* reference to gateway */
- struct lnet_ping_info *rcd_pinginfo; /* ping buffer */
-} lnet_rc_data_t;
+/*
+ * Descriptor of a ping info buffer: keep a separate indicator of the
+ * size and a reference count. The type is used both as a source and
+ * sink of data, so we need to keep some information outside of the
+ * area that may be overwritten by network data.
+ */
+struct lnet_ping_buffer {
+ int pb_nnis;
+ atomic_t pb_refcnt;
+ bool pb_needs_post;
+ struct lnet_ping_info pb_info;
+};
+
+#define LNET_PING_BUFFER_SIZE(NNIDS) \
+ offsetof(struct lnet_ping_buffer, pb_info.pi_ni[NNIDS])
+#define LNET_PING_BUFFER_LONI(PBUF) ((PBUF)->pb_info.pi_ni[0].ns_nid)
+#define LNET_PING_BUFFER_SEQNO(PBUF) ((PBUF)->pb_info.pi_ni[0].ns_status)
+
+#define LNET_PING_INFO_TO_BUFFER(PINFO) \
+ container_of((PINFO), struct lnet_ping_buffer, pb_info)
+
+struct lnet_nid_list {
+ struct list_head nl_list;
+ lnet_nid_t nl_nid;
+};
struct lnet_peer_ni {
- /* chain on peer_net */
- struct list_head lpni_on_peer_net_list;
+ /* chain on lpn_peer_nis */
+ struct list_head lpni_peer_nis;
/* chain on remote peer list */
struct list_head lpni_on_remote_peer_ni_list;
+ /* chain on recovery queue */
+ struct list_head lpni_recovery;
/* chain on peer hash */
struct list_head lpni_hashlist;
/* messages blocking for tx credits */
struct list_head lpni_txq;
- /* messages blocking for router credits */
- struct list_head lpni_rtrq;
- /* chain on router list */
- struct list_head lpni_rtr_list;
/* pointer to peer net I'm part of */
struct lnet_peer_net *lpni_peer_net;
/* statistics kept on each peer NI */
struct lnet_element_stats lpni_stats;
- /* spin lock protecting credits and lpni_txq / lpni_rtrq */
+ struct lnet_health_remote_stats lpni_hstats;
+ /* spin lock protecting credits and lpni_txq */
spinlock_t lpni_lock;
/* # tx credits available */
int lpni_txcredits;
/* low water mark */
int lpni_mintxcredits;
+ /*
+ * Each peer_ni in a gateway maintains its own credits. This
+ * allows more traffic to gateways that have multiple interfaces.
+ */
/* # router credits */
int lpni_rtrcredits;
/* low water mark */
int lpni_minrtrcredits;
/* bytes queued for sending */
long lpni_txqnob;
- /* alive/dead? */
- bool lpni_alive;
- /* notification outstanding? */
- bool lpni_notify;
- /* outstanding notification for LND? */
- bool lpni_notifylnd;
- /* some thread is handling notification */
- bool lpni_notifying;
- /* SEND event outstanding from ping */
- bool lpni_ping_notsent;
- /* # times router went dead<->alive. Protected with lpni_lock */
- int lpni_alive_count;
- /* time of last aliveness news */
- cfs_time_t lpni_timestamp;
- /* time of last ping attempt */
- cfs_time_t lpni_ping_timestamp;
- /* != 0 if ping reply expected */
- cfs_time_t lpni_ping_deadline;
- /* when I was last alive */
- cfs_time_t lpni_last_alive;
- /* when lpni_ni was queried last time */
- cfs_time_t lpni_last_query;
/* network peer is on */
struct lnet_net *lpni_net;
/* peer's NID */
lnet_nid_t lpni_nid;
/* # refs */
- atomic_t lpni_refcount;
+ struct kref lpni_kref;
+ /* health value for the peer */
+ atomic_t lpni_healthv;
+ /* recovery ping mdh */
+ struct lnet_handle_md lpni_recovery_ping_mdh;
+ /* When to send the next recovery ping */
+ time64_t lpni_next_ping;
+ /* How many pings sent during current recovery period did not receive
+ * a reply. NB: reset whenever _any_ message arrives from this peer NI
+ */
+ unsigned int lpni_ping_count;
/* CPT this peer attached on */
int lpni_cpt;
- /* # refs from lnet_route_t::lr_gateway */
- int lpni_rtr_refcount;
+ /* state flags -- protected by lpni_lock */
+ unsigned lpni_state;
+ /* status of the peer NI as reported by the peer */
+ __u32 lpni_ns_status;
/* sequence number used to round robin over peer nis within a net */
__u32 lpni_seq;
/* sequence number used to round robin over gateways */
__u32 lpni_gw_seq;
- /* health flag */
- bool lpni_healthy;
/* returned RC ping features. Protected with lpni_lock */
unsigned int lpni_ping_feats;
- /* routes on this peer */
- struct list_head lpni_routes;
- /* array of preferred local nids */
- lnet_nid_t *lpni_pref_nids;
+ /* time last message was received from the peer */
+ time64_t lpni_last_alive;
+ /* preferred local nids: if only one, use lpni_pref.nid */
+ union lpni_pref {
+ lnet_nid_t nid;
+ struct list_head nids;
+ } lpni_pref;
+ /* list of router nids preferred for this peer NI */
+ struct list_head lpni_rtr_pref_nids;
+ /* The relative selection priority of this peer NI */
+ __u32 lpni_sel_priority;
/* number of preferred NIDs in lnpi_pref_nids */
__u32 lpni_pref_nnids;
- /* router checker state */
- struct lnet_rc_data *lpni_rcd;
};
+/* Preferred path added due to traffic on non-MR peer_ni */
+#define LNET_PEER_NI_NON_MR_PREF BIT(0)
+/* peer is being recovered. */
+#define LNET_PEER_NI_RECOVERY_PENDING BIT(1)
+/* recovery ping failed */
+#define LNET_PEER_NI_RECOVERY_FAILED BIT(2)
+/* peer is being deleted */
+#define LNET_PEER_NI_DELETING BIT(3)
+
struct lnet_peer {
- /* chain on global peer list */
- struct list_head lp_on_lnet_peer_list;
+ /* chain on pt_peer_list */
+ struct list_head lp_peer_list;
/* list of peer nets */
struct list_head lp_peer_nets;
+ /* list of messages pending discovery*/
+ struct list_head lp_dc_pendq;
+
+ /* chain on router list */
+ struct list_head lp_rtr_list;
+
/* primary NID of the peer */
lnet_nid_t lp_primary_nid;
- /* peer is Multi-Rail enabled peer */
- bool lp_multi_rail;
+ /* source NID to use during discovery */
+ lnet_nid_t lp_disc_src_nid;
+ /* destination NID to use during discovery */
+ lnet_nid_t lp_disc_dst_nid;
+
+ /* net to perform discovery on */
+ __u32 lp_disc_net_id;
+
+ /* CPT of peer_table */
+ int lp_cpt;
+
+ /* number of NIDs on this peer */
+ int lp_nnis;
+
+ /* # refs from lnet_route::lr_gateway */
+ int lp_rtr_refcount;
+
+ /*
+ * peer specific health sensitivity value to decrement peer nis in
+ * this peer with if set to something other than 0
+ */
+ __u32 lp_health_sensitivity;
+
+ /* messages blocking for router credits */
+ struct list_head lp_rtrq;
+
+ /* routes on this peer */
+ struct list_head lp_routes;
+
+ /* reference count */
+ atomic_t lp_refcount;
+
+ /* lock protecting peer state flags and lpni_rtrq */
+ spinlock_t lp_lock;
+
+ /* peer state flags */
+ unsigned lp_state;
+
+ /* buffer for data pushed by peer */
+ struct lnet_ping_buffer *lp_data;
+
+ /* MD handle for ping in progress */
+ struct lnet_handle_md lp_ping_mdh;
+
+ /* MD handle for push in progress */
+ struct lnet_handle_md lp_push_mdh;
+
+ /* number of NIDs for sizing push data */
+ int lp_data_nnis;
+
+ /* NI config sequence number of peer */
+ __u32 lp_peer_seqno;
+
+ /* Local NI config sequence number acked by peer */
+ __u32 lp_node_seqno;
+
+ /* Local NI config sequence number sent to peer */
+ __u32 lp_node_seqno_sent;
+
+ /* Ping error encountered during discovery. */
+ int lp_ping_error;
+
+ /* Push error encountered during discovery. */
+ int lp_push_error;
+
+ /* Error encountered during discovery. */
+ int lp_dc_error;
+
+ /* time it was put on the ln_dc_working queue */
+ time64_t lp_last_queued;
+
+ /* link on discovery-related lists */
+ struct list_head lp_dc_list;
+
+ /* tasks waiting on discovery of this peer */
+ wait_queue_head_t lp_dc_waitq;
+
+ /* cached peer aliveness */
+ bool lp_alive;
};
+/*
+ * The status flags in lp_state. Their semantics have chosen so that
+ * lp_state can be zero-initialized.
+ *
+ * A peer is marked MULTI_RAIL in two cases: it was configured using DLC
+ * as multi-rail aware, or the LNET_PING_FEAT_MULTI_RAIL bit was set.
+ *
+ * A peer is marked NO_DISCOVERY if the LNET_PING_FEAT_DISCOVERY bit was
+ * NOT set when the peer was pinged by discovery.
+ *
+ * A peer is marked ROUTER if it indicates so in the feature bit.
+ */
+#define LNET_PEER_MULTI_RAIL BIT(0) /* Multi-rail aware */
+#define LNET_PEER_NO_DISCOVERY BIT(1) /* Peer disabled discovery */
+#define LNET_PEER_ROUTER_ENABLED BIT(2) /* router feature enabled */
+
+/*
+ * A peer is marked CONFIGURED if it was configured by DLC.
+ *
+ * In addition, a peer is marked DISCOVERED if it has fully passed
+ * through Peer Discovery.
+ *
+ * When Peer Discovery is disabled, the discovery thread will mark
+ * peers REDISCOVER to indicate that they should be re-examined if
+ * discovery is (re)enabled on the node.
+ *
+ * A peer that was created as the result of inbound traffic will not
+ * be marked at all.
+ */
+#define LNET_PEER_CONFIGURED BIT(3) /* Configured via DLC */
+#define LNET_PEER_DISCOVERED BIT(4) /* Peer was discovered */
+#define LNET_PEER_REDISCOVER BIT(5) /* Discovery was disabled */
+/*
+ * A peer is marked DISCOVERING when discovery is in progress.
+ * The other flags below correspond to stages of discovery.
+ */
+#define LNET_PEER_DISCOVERING BIT(6) /* Discovering */
+#define LNET_PEER_DATA_PRESENT BIT(7) /* Remote peer data present */
+#define LNET_PEER_NIDS_UPTODATE BIT(8) /* Remote peer info uptodate */
+#define LNET_PEER_PING_SENT BIT(9) /* Waiting for REPLY to Ping */
+#define LNET_PEER_PUSH_SENT BIT(10) /* Waiting for ACK of Push */
+#define LNET_PEER_PING_FAILED BIT(11) /* Ping send failure */
+#define LNET_PEER_PUSH_FAILED BIT(12) /* Push send failure */
+/*
+ * A ping can be forced as a way to fix up state, or as a manual
+ * intervention by an admin.
+ * A push can be forced in circumstances that would normally not
+ * allow for one to happen.
+ */
+#define LNET_PEER_FORCE_PING BIT(13) /* Forced Ping */
+#define LNET_PEER_FORCE_PUSH BIT(14) /* Forced Push */
+
+/* force delete even if router */
+#define LNET_PEER_RTR_NI_FORCE_DEL BIT(15)
+
+/* gw undergoing alive discovery */
+#define LNET_PEER_RTR_DISCOVERY BIT(16)
+/* gw has undergone discovery (does not indicate success or failure) */
+#define LNET_PEER_RTR_DISCOVERED BIT(17)
+
+/* peer is marked for deletion */
+#define LNET_PEER_MARK_DELETION BIT(18)
+/* lnet_peer_del()/lnet_peer_del_locked() has been called on the peer */
+#define LNET_PEER_MARK_DELETED BIT(19)
+
struct lnet_peer_net {
- /* chain on peer block */
- struct list_head lpn_on_peer_list;
+ /* chain on lp_peer_nets */
+ struct list_head lpn_peer_nets;
/* list of peer_nis on this network */
struct list_head lpn_peer_nis;
/* Net ID */
__u32 lpn_net_id;
+
+ /* peer net health */
+ int lpn_healthv;
+
+ /* time of next router ping on this net */
+ time64_t lpn_next_ping;
+
+ /* selection sequence number */
+ __u32 lpn_seq;
+
+ /* relative peer net selection priority */
+ __u32 lpn_sel_priority;
+
+ /* reference count */
+ atomic_t lpn_refcount;
};
/* peer hash size */
#define LNET_PEER_HASH_BITS 9
#define LNET_PEER_HASH_SIZE (1 << LNET_PEER_HASH_BITS)
-/* peer hash table */
+/*
+ * peer hash table - one per CPT
+ *
+ * protected by lnet_net_lock/EX for update
+ * pt_version
+ * pt_hash[...]
+ * pt_peer_list
+ * pt_peers
+ * protected by pt_zombie_lock:
+ * pt_zombie_list
+ * pt_zombies
+ *
+ * pt_zombie lock nests inside lnet_net_lock
+ */
struct lnet_peer_table {
int pt_version; /* /proc validity stamp */
- atomic_t pt_number; /* # peers extant */
struct list_head *pt_hash; /* NID->peer hash */
- struct list_head pt_zombie_list; /* zombie peers */
- int pt_zombies; /* # zombie peers */
+ struct list_head pt_peer_list; /* peers */
+ int pt_peers; /* # peers */
+ struct list_head pt_zombie_list; /* zombie peer_ni */
+ int pt_zombies; /* # zombie peers_ni */
spinlock_t pt_zombie_lock; /* protect list and count */
};
((lp)->lpni_net) && \
(lp)->lpni_net->net_tunables.lct_peer_timeout > 0)
-typedef struct lnet_route {
+struct lnet_route {
struct list_head lr_list; /* chain on net */
struct list_head lr_gwlist; /* chain on gateway */
- struct lnet_peer_ni *lr_gateway; /* router node */
+ struct lnet_peer *lr_gateway; /* router node */
+ lnet_nid_t lr_nid; /* NID used to add route */
__u32 lr_net; /* remote network number */
+ __u32 lr_lnet; /* local network number */
int lr_seq; /* sequence for round-robin */
- unsigned int lr_downis; /* number of down NIs */
__u32 lr_hops; /* how far I am */
unsigned int lr_priority; /* route priority */
-} lnet_route_t;
+ atomic_t lr_alive; /* cached route aliveness */
+ bool lr_single_hop; /* this route is single-hop */
+};
#define LNET_REMOTE_NETS_HASH_DEFAULT (1U << 7)
#define LNET_REMOTE_NETS_HASH_MAX (1U << 16)
#define LNET_REMOTE_NETS_HASH_SIZE (1 << the_lnet.ln_remote_nets_hbits)
-typedef struct lnet_remotenet {
+struct lnet_remotenet {
/* chain on ln_remote_nets_hash */
struct list_head lrn_list;
/* routes to me */
struct list_head lrn_routes;
/* my net number */
__u32 lrn_net;
-} lnet_remotenet_t;
+};
/** lnet message has credit and can be submitted to lnd for send/receive */
#define LNET_CREDIT_OK 0
/** lnet message is waiting for credit */
#define LNET_CREDIT_WAIT 1
+/** lnet message is waiting for discovery */
+#define LNET_DC_WAIT 2
-typedef struct lnet_rtrbufpool {
+struct lnet_rtrbufpool {
/* my free buffer pool */
struct list_head rbp_bufs;
/* messages blocking for a buffer */
int rbp_credits;
/* low water mark */
int rbp_mincredits;
-} lnet_rtrbufpool_t;
+};
-typedef struct lnet_rtrbuf {
+struct lnet_rtrbuf {
struct list_head rb_list; /* chain on rbp_bufs */
struct lnet_rtrbufpool *rb_pool; /* owning pool */
- lnet_kiov_t rb_kiov[0]; /* the buffer space */
-} lnet_rtrbuf_t;
+ struct bio_vec rb_kiov[0]; /* the buffer space */
+};
#define LNET_PEER_HASHSIZE 503 /* prime! */
enum lnet_match_flags {
/* Didn't match anything */
- LNET_MATCHMD_NONE = (1 << 0),
+ LNET_MATCHMD_NONE = BIT(0),
/* Matched OK */
- LNET_MATCHMD_OK = (1 << 1),
+ LNET_MATCHMD_OK = BIT(1),
/* Must be discarded */
- LNET_MATCHMD_DROP = (1 << 2),
+ LNET_MATCHMD_DROP = BIT(2),
/* match and buffer is exhausted */
- LNET_MATCHMD_EXHAUSTED = (1 << 3),
+ LNET_MATCHMD_EXHAUSTED = BIT(3),
/* match or drop */
LNET_MATCHMD_FINISH = (LNET_MATCHMD_OK | LNET_MATCHMD_DROP),
};
/* Options for struct lnet_portal::ptl_options */
-#define LNET_PTL_LAZY (1 << 0)
-#define LNET_PTL_MATCH_UNIQUE (1 << 1) /* unique match, for RDMA */
-#define LNET_PTL_MATCH_WILDCARD (1 << 2) /* wildcard match, request portal */
+#define LNET_PTL_LAZY BIT(0)
+#define LNET_PTL_MATCH_UNIQUE BIT(1) /* unique match, for RDMA */
+#define LNET_PTL_MATCH_WILDCARD BIT(2) /* wildcard match, request portal */
/* parameter for matching operations (GET, PUT) */
struct lnet_match_info {
/* dispatch routed PUT message by hashing source NID for wildcard portals */
#define LNET_PTL_ROTOR_HASH_RT 3
-typedef struct lnet_portal {
+struct lnet_portal {
spinlock_t ptl_lock;
unsigned int ptl_index; /* portal ID, reserved */
/* flags on this portal: lazy, unique... */
int ptl_mt_nmaps;
/* array of active entries' cpu-partition-id */
int ptl_mt_maps[0];
-} lnet_portal_t;
+};
#define LNET_LH_HASH_BITS 12
#define LNET_LH_HASH_SIZE (1ULL << LNET_LH_HASH_BITS)
int msc_nfinalizers;
/* msgs waiting to complete finalizing */
struct list_head msc_finalizing;
+ /* msgs waiting to be resent */
+ struct list_head msc_resending;
struct list_head msc_active; /* active message list */
/* threads doing finalization */
void **msc_finalizers;
+ /* threads doing resends */
+ void **msc_resenders;
+};
+
+/* This UDSP structures need to match the user space liblnetconfig structures
+ * in order for the marshall and unmarshall functions to be common.
+ */
+
+/* Net is described as a
+ * 1. net type
+ * 2. num range
+ */
+struct lnet_ud_net_descr {
+ __u32 udn_net_type;
+ struct list_head udn_net_num_range;
};
+/* each NID range is defined as
+ * 1. net descriptor
+ * 2. address range descriptor
+ */
+struct lnet_ud_nid_descr {
+ struct lnet_ud_net_descr ud_net_id;
+ struct list_head ud_addr_range;
+ __u32 ud_mem_size;
+};
+
+/* a UDSP rule can have up to three user defined NID descriptors
+ * - src: defines the local NID range for the rule
+ * - dst: defines the peer NID range for the rule
+ * - rte: defines the router NID range for the rule
+ *
+ * An action union defines the action to take when the rule
+ * is matched
+ */
+struct lnet_udsp {
+ struct list_head udsp_on_list;
+ __u32 udsp_idx;
+ struct lnet_ud_nid_descr udsp_src;
+ struct lnet_ud_nid_descr udsp_dst;
+ struct lnet_ud_nid_descr udsp_rte;
+ enum lnet_udsp_action_type udsp_action_type;
+ union {
+ __u32 udsp_priority;
+ } udsp_action;
+};
+
+/* Peer Discovery states */
+#define LNET_DC_STATE_SHUTDOWN 0 /* not started */
+#define LNET_DC_STATE_RUNNING 1 /* started up OK */
+#define LNET_DC_STATE_STOPPING 2 /* telling thread to stop */
+
/* Router Checker states */
-#define LNET_RC_STATE_SHUTDOWN 0 /* not started */
-#define LNET_RC_STATE_RUNNING 1 /* started up OK */
-#define LNET_RC_STATE_STOPPING 2 /* telling thread to stop */
+#define LNET_MT_STATE_SHUTDOWN 0 /* not started */
+#define LNET_MT_STATE_RUNNING 1 /* started up OK */
+#define LNET_MT_STATE_STOPPING 2 /* telling thread to stop */
/* LNet states */
#define LNET_STATE_SHUTDOWN 0 /* not started */
#define LNET_STATE_RUNNING 1 /* started up OK */
#define LNET_STATE_STOPPING 2 /* telling thread to stop */
-typedef struct lnet {
+struct lnet {
/* CPU partition table of LNet */
struct cfs_cpt_table *ln_cpt_table;
/* number of CPTs in ln_cpt_table */
int ln_nportals;
/* the vector of portals */
struct lnet_portal **ln_portals;
- /* percpt ME containers */
- struct lnet_res_container **ln_me_containers;
/* percpt MD container */
struct lnet_res_container **ln_md_containers;
/* Event Queue container */
struct lnet_res_container ln_eq_container;
- wait_queue_head_t ln_eq_waitq;
spinlock_t ln_eq_wait_lock;
unsigned int ln_remote_nets_hbits;
struct lnet_msg_container **ln_msg_containers;
struct lnet_counters **ln_counters;
struct lnet_peer_table **ln_peer_tables;
- /* list of configured or discovered peers */
- struct list_head ln_peers;
/* list of peer nis not on a local network */
struct list_head ln_remote_peer_ni_list;
/* failure simulation */
struct lnet_ni *ln_loni;
/* network zombie list */
struct list_head ln_net_zombie;
+ /* resend messages list */
+ struct list_head ln_msg_resend;
+ /* spin lock to protect the msg resend list */
+ spinlock_t ln_msg_resend_lock;
/* remote networks with routes to them */
struct list_head *ln_remote_nets_hash;
/* percpt router buffer pools */
struct lnet_rtrbufpool **ln_rtrpools;
+ /*
+ * Ping target / Push source
+ *
+ * The ping target and push source share a single buffer. The
+ * ln_ping_target is protected against concurrent updates by
+ * ln_api_mutex.
+ */
struct lnet_handle_md ln_ping_target_md;
- struct lnet_handle_eq ln_ping_target_eq;
- struct lnet_ping_info *ln_ping_info;
-
- /* router checker startup/shutdown state */
- int ln_rc_state;
- /* router checker's event queue */
- struct lnet_handle_eq ln_rc_eqh;
- /* rcd still pending on net */
- struct list_head ln_rcd_deathrow;
- /* rcd ready for free */
- struct list_head ln_rcd_zombie;
+ lnet_handler_t ln_ping_target_handler;
+ struct lnet_ping_buffer *ln_ping_target;
+ atomic_t ln_ping_target_seqno;
+
+ /*
+ * Push Target
+ *
+ * ln_push_nnis contains the desired size of the push target.
+ * The lnet_net_lock is used to handle update races. The old
+ * buffer may linger a while after it has been unlinked, in
+ * which case the event handler cleans up.
+ */
+ lnet_handler_t ln_push_target_handler;
+ struct lnet_handle_md ln_push_target_md;
+ struct lnet_ping_buffer *ln_push_target;
+ int ln_push_target_nnis;
+
+ /* discovery event queue handle */
+ lnet_handler_t ln_dc_handler;
+ /* discovery requests */
+ struct list_head ln_dc_request;
+ /* discovery working list */
+ struct list_head ln_dc_working;
+ /* discovery expired list */
+ struct list_head ln_dc_expired;
+ /* discovery thread wait queue */
+ wait_queue_head_t ln_dc_waitq;
+ /* discovery startup/shutdown state */
+ int ln_dc_state;
+
+ /* monitor thread startup/shutdown state */
+ int ln_mt_state;
/* serialise startup/shutdown */
- struct semaphore ln_rc_signal;
+ struct semaphore ln_mt_signal;
struct mutex ln_api_mutex;
struct mutex ln_lnd_mutex;
/* uniquely identifies this ni in this epoch */
__u64 ln_interface_cookie;
/* registered LNDs */
- struct list_head ln_lnds;
+ const struct lnet_lnd *ln_lnds[NUM_LNDS];
/* test protocol compatibility flags */
- int ln_testprotocompat;
+ unsigned long ln_testprotocompat;
/* 0 - load the NIs from the mod params
* 1 - do not load the NIs from the mod params
*/
bool ln_nis_from_mod_params;
- /* waitq for router checker. As long as there are no routes in
- * the list, the router checker will sleep on this queue. when
- * routes are added the thread will wake up */
- wait_queue_head_t ln_rc_waitq;
-} lnet_t;
+ /*
+ * completion for the monitor thread. The monitor thread takes care of
+ * checking routes, timedout messages and resending messages.
+ */
+ struct completion ln_mt_wait_complete;
+
+ /* per-cpt resend queues */
+ struct list_head **ln_mt_resendqs;
+ /* local NIs to recover */
+ struct list_head ln_mt_localNIRecovq;
+ /* local NIs to recover */
+ struct list_head ln_mt_peerNIRecovq;
+ /*
+ * An array of queues for GET/PUT waiting for REPLY/ACK respectively.
+ * There are CPT number of queues. Since response trackers will be
+ * added on the fast path we can't afford to grab the exclusive
+ * net lock to protect these queues. The CPT will be calculated
+ * based on the mdh cookie.
+ */
+ struct list_head **ln_mt_rstq;
+ /*
+ * A response tracker becomes a zombie when the associated MD is queued
+ * for unlink before the response tracker is detached from the MD. An
+ * entry on a zombie list can be freed when either the remaining
+ * operations on the MD complete or when LNet has shut down.
+ */
+ struct list_head **ln_mt_zombie_rstqs;
+ /* recovery handler */
+ lnet_handler_t ln_mt_handler;
+
+ /*
+ * Completed when the discovery and monitor threads can enter their
+ * work loops
+ */
+ struct completion ln_started;
+ /* UDSP list */
+ struct list_head ln_udsp_list;
+};
#endif