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-rw-r--r--erts/emulator/beam/dist.c894
1 files changed, 545 insertions, 349 deletions
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index e6e4221c08..8593ad867a 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -103,21 +103,12 @@ dist_msg_dbg(ErtsDistExternal *edep, char *what, byte *buf, int sz)
-#define PASS_THROUGH 'p' /* This code should go */
-
int erts_is_alive; /* System must be blocked on change */
int erts_dist_buf_busy_limit;
/* distribution trap functions */
-Export* dsend2_trap = NULL;
-Export* dsend3_trap = NULL;
-/*Export* dsend_nosuspend_trap = NULL;*/
-Export* dlink_trap = NULL;
-Export* dunlink_trap = NULL;
Export* dmonitor_node_trap = NULL;
-Export* dgroup_leader_trap = NULL;
-Export* dexit_trap = NULL;
Export* dmonitor_p_trap = NULL;
/* local variables */
@@ -129,6 +120,7 @@ static void clear_dist_entry(DistEntry*);
static int dsig_send_ctl(ErtsDSigData* dsdp, Eterm ctl, int force_busy);
static void send_nodes_mon_msgs(Process *, Eterm, Eterm, Eterm, Eterm);
static void init_nodes_monitors(void);
+static Sint abort_connection(DistEntry* dep, Uint32 conn_id);
static erts_atomic_t no_caches;
static erts_atomic_t no_nodes;
@@ -486,41 +478,55 @@ int erts_do_net_exits(DistEntry *dep, Eterm reason)
if (dep == erts_this_dist_entry) { /* Net kernel has died (clean up!!) */
DistEntry *tdep;
- int no_dist_ctrl = 0;
+ int no_dist_ctrl;
+ int no_pending;
Eterm nd_reason = (reason == am_no_network
? am_no_network
: am_net_kernel_terminated);
+ int i = 0;
+ Eterm *dist_ctrl;
+ DistEntry** pending;
+
+ ERTS_UNDEF(dist_ctrl, NULL);
+ ERTS_UNDEF(pending, NULL);
+
erts_rwmtx_rlock(&erts_dist_table_rwmtx);
- for (tdep = erts_hidden_dist_entries; tdep; tdep = tdep->next)
- no_dist_ctrl++;
- for (tdep = erts_visible_dist_entries; tdep; tdep = tdep->next)
- no_dist_ctrl++;
+ no_dist_ctrl = (erts_no_of_hidden_dist_entries +
+ erts_no_of_visible_dist_entries);
+ no_pending = erts_no_of_pending_dist_entries;
/* KILL all port controllers */
- if (no_dist_ctrl == 0)
- erts_rwmtx_runlock(&erts_dist_table_rwmtx);
- else {
- Eterm def_buf[128];
- int i = 0;
- Eterm *dist_ctrl;
-
- if (no_dist_ctrl <= sizeof(def_buf)/sizeof(def_buf[0]))
- dist_ctrl = &def_buf[0];
- else
- dist_ctrl = erts_alloc(ERTS_ALC_T_TMP,
- sizeof(Eterm)*no_dist_ctrl);
+ if (no_dist_ctrl) {
+ dist_ctrl = erts_alloc(ERTS_ALC_T_TMP,
+ sizeof(Eterm)*no_dist_ctrl);
for (tdep = erts_hidden_dist_entries; tdep; tdep = tdep->next) {
ASSERT(is_internal_port(tdep->cid) || is_internal_pid(tdep->cid));
+ ASSERT(i < no_dist_ctrl);
dist_ctrl[i++] = tdep->cid;
}
for (tdep = erts_visible_dist_entries; tdep; tdep = tdep->next) {
ASSERT(is_internal_port(tdep->cid) || is_internal_pid(tdep->cid));
+ ASSERT(i < no_dist_ctrl);
dist_ctrl[i++] = tdep->cid;
}
- erts_rwmtx_runlock(&erts_dist_table_rwmtx);
+ ASSERT(i == no_dist_ctrl);
+ }
+ if (no_pending) {
+ pending = erts_alloc(ERTS_ALC_T_TMP, sizeof(DistEntry*)*no_pending);
+ i = 0;
+ for (tdep = erts_pending_dist_entries; tdep; tdep = tdep->next) {
+ ASSERT(is_nil(tdep->cid));
+ ASSERT(i < no_pending);
+ pending[i++] = tdep;
+ erts_ref_dist_entry(tdep);
+ }
+ ASSERT(i == no_pending);
+ }
+ erts_rwmtx_runlock(&erts_dist_table_rwmtx);
- for (i = 0; i < no_dist_ctrl; i++) {
+ if (no_dist_ctrl) {
+ for (i = 0; i < no_dist_ctrl; i++) {
if (is_internal_pid(dist_ctrl[i]))
schedule_kill_dist_ctrl_proc(dist_ctrl[i]);
else {
@@ -534,11 +540,18 @@ int erts_do_net_exits(DistEntry *dep, Eterm reason)
prt, dist_ctrl[i], nd_reason, NULL);
}
}
- }
+ }
+ erts_free(ERTS_ALC_T_TMP, dist_ctrl);
+ }
+
+ if (no_pending) {
+ for (i = 0; i < no_pending; i++) {
+ abort_connection(pending[i], pending[i]->connection_id);
+ erts_deref_dist_entry(pending[i]);
+ }
+ erts_free(ERTS_ALC_T_TMP, pending);
+ }
- if (dist_ctrl != &def_buf[0])
- erts_free(ERTS_ALC_T_TMP, dist_ctrl);
- }
/*
* When last dist ctrl exits, node will be taken
@@ -615,7 +628,6 @@ int erts_do_net_exits(DistEntry *dep, Eterm reason)
reason == am_normal ? am_connection_closed : reason);
clear_dist_entry(dep);
-
}
dec_no_nodes();
@@ -640,14 +652,7 @@ void init_dist(void)
erts_atomic_init_nob(&no_caches, 0);
/* Lookup/Install all references to trap functions */
- dsend2_trap = trap_function(am_dsend,2);
- dsend3_trap = trap_function(am_dsend,3);
- /* dsend_nosuspend_trap = trap_function(am_dsend_nosuspend,2);*/
- dlink_trap = trap_function(am_dlink,1);
- dunlink_trap = trap_function(am_dunlink,1);
dmonitor_node_trap = trap_function(am_dmonitor_node,3);
- dgroup_leader_trap = trap_function(am_dgroup_leader,2);
- dexit_trap = trap_function(am_dexit, 2);
dmonitor_p_trap = trap_function(am_dmonitor_p, 2);
dist_ctrl_put_data_trap = erts_export_put(am_erts_internal,
am_dist_ctrl_put_data,
@@ -666,6 +671,7 @@ alloc_dist_obuf(Uint size)
obuf = (ErtsDistOutputBuf *) &bin->orig_bytes[0];
#ifdef DEBUG
obuf->dbg_pattern = ERTS_DIST_OUTPUT_BUF_DBG_PATTERN;
+ obuf->alloc_endp = obuf->data + size;
ASSERT(bin == ErtsDistOutputBuf2Binary(obuf));
#endif
return obuf;
@@ -686,31 +692,11 @@ size_obuf(ErtsDistOutputBuf *obuf)
return bin->orig_size;
}
-static void clear_dist_entry(DistEntry *dep)
+static ErtsDistOutputBuf* clear_de_out_queues(DistEntry* dep)
{
- Sint obufsize = 0;
- ErtsAtomCache *cache;
- ErtsProcList *suspendees;
ErtsDistOutputBuf *obuf;
- erts_de_rwlock(dep);
- erts_atomic_set_nob(&dep->input_handler,
- (erts_aint_t) NIL);
- cache = dep->cache;
- dep->cache = NULL;
-
-#ifdef DEBUG
- erts_de_links_lock(dep);
- ASSERT(!dep->nlinks);
- ASSERT(!dep->node_links);
- ASSERT(!dep->monitors);
- erts_de_links_unlock(dep);
-#endif
-
- erts_mtx_lock(&dep->qlock);
-
- erts_atomic64_set_nob(&dep->in, 0);
- erts_atomic64_set_nob(&dep->out, 0);
+ ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&dep->qlock));
if (!dep->out_queue.last)
obuf = dep->finalized_out_queue.first;
@@ -730,17 +716,13 @@ static void clear_dist_entry(DistEntry *dep)
dep->tmp_out_queue.last = NULL;
dep->finalized_out_queue.first = NULL;
dep->finalized_out_queue.last = NULL;
- dep->status = 0;
- suspendees = get_suspended_on_de(dep, ERTS_DE_QFLGS_ALL);
- erts_mtx_unlock(&dep->qlock);
- erts_atomic_set_nob(&dep->dist_cmd_scheduled, 0);
- dep->send = NULL;
- erts_de_rwunlock(dep);
-
- erts_resume_processes(suspendees);
+ return obuf;
+}
- delete_cache(cache);
+static void free_de_out_queues(DistEntry* dep, ErtsDistOutputBuf *obuf)
+{
+ Sint obufsize = 0;
while (obuf) {
ErtsDistOutputBuf *fobuf;
@@ -752,13 +734,56 @@ static void clear_dist_entry(DistEntry *dep)
if (obufsize) {
erts_mtx_lock(&dep->qlock);
- ASSERT(erts_atomic_read_nob(&dep->qsize) >= obufsize);
+ ASSERT(erts_atomic_read_nob(&dep->qsize) >= obufsize);
erts_atomic_add_nob(&dep->qsize,
(erts_aint_t) -obufsize);
erts_mtx_unlock(&dep->qlock);
}
}
+static void clear_dist_entry(DistEntry *dep)
+{
+ ErtsAtomCache *cache;
+ ErtsProcList *suspendees;
+ ErtsDistOutputBuf *obuf;
+
+ erts_de_rwlock(dep);
+ erts_atomic_set_nob(&dep->input_handler,
+ (erts_aint_t) NIL);
+ cache = dep->cache;
+ dep->cache = NULL;
+
+#ifdef DEBUG
+ erts_de_links_lock(dep);
+ ASSERT(!dep->nlinks);
+ ASSERT(!dep->node_links);
+ ASSERT(!dep->monitors);
+ erts_de_links_unlock(dep);
+#endif
+
+ erts_mtx_lock(&dep->qlock);
+
+ erts_atomic64_set_nob(&dep->in, 0);
+ erts_atomic64_set_nob(&dep->out, 0);
+
+ obuf = clear_de_out_queues(dep);
+ dep->status = 0;
+ suspendees = get_suspended_on_de(dep, ERTS_DE_QFLGS_ALL);
+
+ erts_mtx_unlock(&dep->qlock);
+ erts_atomic_set_nob(&dep->dist_cmd_scheduled, 0);
+ dep->send = NULL;
+ erts_de_rwunlock(dep);
+
+ erts_resume_processes(suspendees);
+
+ delete_cache(cache);
+
+ free_de_out_queues(dep, obuf);
+ if (dep->transcode_ctx)
+ transcode_free_ctx(dep);
+}
+
int erts_dsend_context_dtor(Binary* ctx_bin)
{
ErtsSendContext* ctx = ERTS_MAGIC_BIN_DATA(ctx_bin);
@@ -774,8 +799,8 @@ int erts_dsend_context_dtor(Binary* ctx_bin)
if (ctx->dss.phase >= ERTS_DSIG_SEND_PHASE_ALLOC && ctx->dss.obuf) {
free_dist_obuf(ctx->dss.obuf);
}
- if (ctx->dep_to_deref)
- erts_deref_dist_entry(ctx->dep_to_deref);
+ if (ctx->deref_dep)
+ erts_deref_dist_entry(ctx->dep);
return 1;
}
@@ -1326,7 +1351,7 @@ int erts_net_message(Port *prt,
/* This is tricky (we MUST force a distributed send) */
ErtsDSigData dsd;
int code;
- code = erts_dsig_prepare(&dsd, dep, NULL, ERTS_DSP_NO_LOCK, 0);
+ code = erts_dsig_prepare(&dsd, dep, NULL, 0, ERTS_DSP_NO_LOCK, 0, 0);
if (code == ERTS_DSIG_PREP_CONNECTED) {
code = erts_dsig_send_exit(&dsd, to, from, am_noproc);
ASSERT(code == ERTS_DSIG_SEND_OK);
@@ -1418,7 +1443,7 @@ int erts_net_message(Port *prt,
if (!rp) {
ErtsDSigData dsd;
int code;
- code = erts_dsig_prepare(&dsd, dep, NULL, ERTS_DSP_NO_LOCK, 0);
+ code = erts_dsig_prepare(&dsd, dep, NULL, 0, ERTS_DSP_NO_LOCK, 0, 0);
if (code == ERTS_DSIG_PREP_CONNECTED) {
code = erts_dsig_send_m_exit(&dsd, watcher, watched, ref,
am_noproc);
@@ -1881,33 +1906,32 @@ erts_dsig_send(ErtsDSigData *dsdp, struct erts_dsig_send_context* ctx)
if (ctx->flags & DFLAG_DIST_HDR_ATOM_CACHE) {
ctx->acmp = erts_get_atom_cache_map(ctx->c_p);
- ctx->pass_through_size = 0;
+ ctx->max_finalize_prepend = 0;
}
else {
ctx->acmp = NULL;
- ctx->pass_through_size = 1;
+ ctx->max_finalize_prepend = 3;
}
#ifdef ERTS_DIST_MSG_DBG
- erts_fprintf(stderr, ">>%s CTL: %T\n", ctx->pass_through_size ? "P" : " ", ctx->ctl);
- if (is_value(ctx->msg))
- erts_fprintf(stderr, " MSG: %T\n", ctx->msg);
+ erts_fprintf(stderr, ">> CTL: %T\n", ctx->ctl);
+ if (is_value(ctx->msg))
+ erts_fprintf(stderr, " MSG: %T\n", ctx->msg);
#endif
- ctx->data_size = ctx->pass_through_size;
+ ctx->data_size = ctx->max_finalize_prepend;
erts_reset_atom_cache_map(ctx->acmp);
erts_encode_dist_ext_size(ctx->ctl, ctx->flags, ctx->acmp, &ctx->data_size);
- if (is_value(ctx->msg)) {
- ctx->u.sc.wstack.wstart = NULL;
- ctx->u.sc.flags = ctx->flags;
- ctx->u.sc.level = 0;
- ctx->phase = ERTS_DSIG_SEND_PHASE_MSG_SIZE;
- } else {
- ctx->phase = ERTS_DSIG_SEND_PHASE_ALLOC;
- }
- break;
+ if (is_non_value(ctx->msg)) {
+ ctx->phase = ERTS_DSIG_SEND_PHASE_ALLOC;
+ break;
+ }
+ ctx->u.sc.wstack.wstart = NULL;
+ ctx->u.sc.flags = ctx->flags;
+ ctx->u.sc.level = 0;
+ ctx->phase = ERTS_DSIG_SEND_PHASE_MSG_SIZE;
case ERTS_DSIG_SEND_PHASE_MSG_SIZE:
if (erts_encode_dist_ext_size_int(ctx->msg, ctx, &ctx->data_size)) {
retval = ERTS_DSIG_SEND_CONTINUE;
@@ -1922,23 +1946,24 @@ erts_dsig_send(ErtsDSigData *dsdp, struct erts_dsig_send_context* ctx)
ctx->data_size += ctx->dhdr_ext_size;
ctx->obuf = alloc_dist_obuf(ctx->data_size);
- ctx->obuf->ext_endp = &ctx->obuf->data[0] + ctx->pass_through_size + ctx->dhdr_ext_size;
+ ctx->obuf->ext_endp = &ctx->obuf->data[0] + ctx->max_finalize_prepend + ctx->dhdr_ext_size;
/* Encode internal version of dist header */
ctx->obuf->extp = erts_encode_ext_dist_header_setup(ctx->obuf->ext_endp, ctx->acmp);
/* Encode control message */
erts_encode_dist_ext(ctx->ctl, &ctx->obuf->ext_endp, ctx->flags, ctx->acmp, NULL, NULL);
- if (is_value(ctx->msg)) {
- ctx->u.ec.flags = ctx->flags;
- ctx->u.ec.level = 0;
- ctx->u.ec.wstack.wstart = NULL;
- ctx->phase = ERTS_DSIG_SEND_PHASE_MSG_ENCODE;
- } else {
- ctx->phase = ERTS_DSIG_SEND_PHASE_FIN;
- }
- break;
+ if (is_non_value(ctx->msg)) {
+ ctx->obuf->msg_start = NULL;
+ ctx->phase = ERTS_DSIG_SEND_PHASE_FIN;
+ break;
+ }
+ ctx->u.ec.flags = ctx->flags;
+ ctx->u.ec.level = 0;
+ ctx->u.ec.wstack.wstart = NULL;
+ ctx->obuf->msg_start = ctx->obuf->ext_endp;
- case ERTS_DSIG_SEND_PHASE_MSG_ENCODE:
+ ctx->phase = ERTS_DSIG_SEND_PHASE_MSG_ENCODE;
+ case ERTS_DSIG_SEND_PHASE_MSG_ENCODE:
if (erts_encode_dist_ext(ctx->msg, &ctx->obuf->ext_endp, ctx->flags, ctx->acmp, &ctx->u.ec, &ctx->reds)) {
retval = ERTS_DSIG_SEND_CONTINUE;
goto done;
@@ -1951,7 +1976,7 @@ erts_dsig_send(ErtsDSigData *dsdp, struct erts_dsig_send_context* ctx)
int resume = 0;
ASSERT(ctx->obuf->extp < ctx->obuf->ext_endp);
- ASSERT(&ctx->obuf->data[0] <= ctx->obuf->extp - ctx->pass_through_size);
+ ASSERT(&ctx->obuf->data[0] <= ctx->obuf->extp - ctx->max_finalize_prepend);
ASSERT(ctx->obuf->ext_endp <= &ctx->obuf->data[0] + ctx->data_size);
ctx->data_size = ctx->obuf->ext_endp - ctx->obuf->extp;
@@ -1963,9 +1988,9 @@ erts_dsig_send(ErtsDSigData *dsdp, struct erts_dsig_send_context* ctx)
ctx->obuf->next = NULL;
erts_de_rlock(dep);
cid = dep->cid;
- if (cid != dsdp->cid
- || dep->connection_id != dsdp->connection_id
- || dep->status & ERTS_DE_SFLG_EXITING) {
+ if (!(dep->status & (ERTS_DE_SFLG_PENDING | ERTS_DE_SFLG_CONNECTED))
+ || dep->status & ERTS_DE_SFLG_EXITING
+ || dep->connection_id != dsdp->connection_id) {
/* Not the same connection as when we started; drop message... */
erts_de_runlock(dep);
free_dist_obuf(ctx->obuf);
@@ -2039,8 +2064,13 @@ erts_dsig_send(ErtsDSigData *dsdp, struct erts_dsig_send_context* ctx)
}
erts_mtx_unlock(&dep->qlock);
- if (is_internal_port(dep->cid))
- erts_schedule_dist_command(NULL, dep);
+ if (!(dep->status & ERTS_DE_SFLG_PENDING)) {
+ if (is_internal_port(dep->cid))
+ erts_schedule_dist_command(NULL, dep);
+ }
+ else {
+ notify_proc = NIL;
+ }
erts_de_runlock(dep);
if (is_internal_pid(notify_proc))
notify_dist_data(ctx->c_p, notify_proc);
@@ -2205,7 +2235,6 @@ dist_port_commandv(Port *prt, ErtsDistOutputBuf *obuf)
#endif
#define ERTS_PORT_REDS_DIST_CMD_START 5
-#define ERTS_PORT_REDS_DIST_CMD_FINALIZE 3
#define ERTS_PORT_REDS_DIST_CMD_EXIT 200
#define ERTS_PORT_REDS_DIST_CMD_RESUMED 5
#define ERTS_PORT_REDS_DIST_CMD_DATA(SZ) \
@@ -2214,9 +2243,9 @@ dist_port_commandv(Port *prt, ErtsDistOutputBuf *obuf)
: ((((Sint) (SZ)) >> 10) & ((Sint) ERTS_PORT_REDS_MASK__)))
int
-erts_dist_command(Port *prt, int reds_limit)
+erts_dist_command(Port *prt, int initial_reds)
{
- Sint reds = ERTS_PORT_REDS_DIST_CMD_START;
+ Sint reds = initial_reds - ERTS_PORT_REDS_DIST_CMD_START;
Uint32 status;
Uint32 flags;
Sint qsize, obufsize = 0;
@@ -2238,9 +2267,12 @@ erts_dist_command(Port *prt, int reds_limit)
if (status & ERTS_DE_SFLG_EXITING) {
erts_deliver_port_exit(prt, prt->common.id, am_killed, 0, 1);
- return reds + ERTS_PORT_REDS_DIST_CMD_EXIT;
+ reds -= ERTS_PORT_REDS_DIST_CMD_EXIT;
+ return initial_reds - reds;
}
+ ASSERT(!(status & ERTS_DE_SFLG_PENDING));
+
ASSERT(send);
/*
@@ -2265,7 +2297,7 @@ erts_dist_command(Port *prt, int reds_limit)
sched_flags = erts_atomic32_read_nob(&prt->sched.flags);
- if (reds > reds_limit)
+ if (reds < 0)
goto preempted;
if (!(sched_flags & ERTS_PTS_FLG_BUSY_PORT) && foq.first) {
@@ -2280,13 +2312,13 @@ erts_dist_command(Port *prt, int reds_limit)
erts_fprintf(stderr, ">> ");
bw(foq.first->extp, size);
#endif
- reds += ERTS_PORT_REDS_DIST_CMD_DATA(size);
- fob = foq.first;
- obufsize += size_obuf(fob);
- foq.first = foq.first->next;
- free_dist_obuf(fob);
+ reds -= ERTS_PORT_REDS_DIST_CMD_DATA(size);
+ fob = foq.first;
+ obufsize += size_obuf(fob);
+ foq.first = foq.first->next;
+ free_dist_obuf(fob);
sched_flags = erts_atomic32_read_nob(&prt->sched.flags);
- preempt = reds > reds_limit || (sched_flags & ERTS_PTS_FLG_EXIT);
+ preempt = reds < 0 || (sched_flags & ERTS_PTS_FLG_EXIT);
if (sched_flags & ERTS_PTS_FLG_BUSY_PORT)
break;
} while (foq.first && !preempt);
@@ -2299,81 +2331,71 @@ erts_dist_command(Port *prt, int reds_limit)
if (sched_flags & ERTS_PTS_FLG_BUSY_PORT) {
if (oq.first) {
ErtsDistOutputBuf *ob;
- int preempt;
+ ErtsDistOutputBuf *last_finalized = NULL;
finalize_only:
- preempt = 0;
ob = oq.first;
ASSERT(ob);
do {
- ob->extp = erts_encode_ext_dist_header_finalize(ob->extp,
- dep->cache,
- flags);
- if (!(flags & DFLAG_DIST_HDR_ATOM_CACHE))
- *--ob->extp = PASS_THROUGH; /* Old node; 'pass through'
- needed */
- ASSERT(&ob->data[0] <= ob->extp && ob->extp < ob->ext_endp);
- reds += ERTS_PORT_REDS_DIST_CMD_FINALIZE;
- preempt = reds > reds_limit;
- if (preempt)
- break;
- ob = ob->next;
+ reds = erts_encode_ext_dist_header_finalize(ob, dep, flags, reds);
+ if (reds >= 0) {
+ last_finalized = ob;
+ ob = ob->next;
+ }
} while (ob);
- /*
- * At least one buffer was finalized; if we got preempted,
- * ob points to the last buffer that we finalized.
- */
- if (foq.last)
- foq.last->next = oq.first;
- else
- foq.first = oq.first;
- if (!preempt) {
- /* All buffers finalized */
- foq.last = oq.last;
- oq.first = oq.last = NULL;
- }
- else {
- /* Not all buffers finalized; split oq. */
- foq.last = ob;
- oq.first = ob->next;
- if (oq.first)
- ob->next = NULL;
- else
- oq.last = NULL;
- }
- if (preempt)
- goto preempted;
+ if (last_finalized) {
+ /*
+ * At least one buffer was finalized; if we got preempted,
+ * ob points to the next buffer to continue finalize.
+ */
+ if (foq.last)
+ foq.last->next = oq.first;
+ else
+ foq.first = oq.first;
+ foq.last = last_finalized;
+ if (!ob) {
+ /* All buffers finalized */
+ ASSERT(foq.last == oq.last);
+ ASSERT(foq.last->next == NULL);
+ oq.first = oq.last = NULL;
+ }
+ else {
+ /* Not all buffers finalized; split oq. */
+ ASSERT(foq.last->next == ob);
+ foq.last->next = NULL;
+ oq.first = ob;
+ }
+ }
+ if (reds <= 0)
+ goto preempted;
}
}
else {
int de_busy;
int preempt = 0;
while (oq.first && !preempt) {
- ErtsDistOutputBuf *fob;
- Uint size;
- oq.first->extp
- = erts_encode_ext_dist_header_finalize(oq.first->extp,
- dep->cache,
- flags);
- reds += ERTS_PORT_REDS_DIST_CMD_FINALIZE;
- if (!(flags & DFLAG_DIST_HDR_ATOM_CACHE))
- *--oq.first->extp = PASS_THROUGH; /* Old node; 'pass through'
- needed */
- ASSERT(&oq.first->data[0] <= oq.first->extp
- && oq.first->extp < oq.first->ext_endp);
- size = (*send)(prt, oq.first);
+ ErtsDistOutputBuf *fob;
+ Uint size;
+ reds = erts_encode_ext_dist_header_finalize(oq.first, dep, flags, reds);
+ if (reds < 0) {
+ preempt = 1;
+ break;
+ }
+ ASSERT(&oq.first->data[0] <= oq.first->extp
+ && oq.first->extp < oq.first->ext_endp);
+ size = (*send)(prt, oq.first);
erts_atomic64_inc_nob(&dep->out);
- esdp->io.out += (Uint64) size;
+ esdp->io.out += (Uint64) size;
#ifdef ERTS_RAW_DIST_MSG_DBG
erts_fprintf(stderr, ">> ");
bw(oq.first->extp, size);
#endif
- reds += ERTS_PORT_REDS_DIST_CMD_DATA(size);
- fob = oq.first;
- obufsize += size_obuf(fob);
- oq.first = oq.first->next;
- free_dist_obuf(fob);
+ reds -= ERTS_PORT_REDS_DIST_CMD_DATA(size);
+ fob = oq.first;
+ obufsize += size_obuf(fob);
+ oq.first = oq.first->next;
+ free_dist_obuf(fob);
sched_flags = erts_atomic32_read_nob(&prt->sched.flags);
- preempt = reds > reds_limit || (sched_flags & ERTS_PTS_FLG_EXIT);
+ preempt = reds <= 0 || (sched_flags & ERTS_PTS_FLG_EXIT);
if ((sched_flags & ERTS_PTS_FLG_BUSY_PORT) && oq.first && !preempt)
goto finalize_only;
}
@@ -2413,7 +2435,7 @@ erts_dist_command(Port *prt, int reds_limit)
erts_mtx_unlock(&dep->qlock);
resumed = erts_resume_processes(suspendees);
- reds += resumed*ERTS_PORT_REDS_DIST_CMD_RESUMED;
+ reds -= resumed*ERTS_PORT_REDS_DIST_CMD_RESUMED;
}
else
erts_mtx_unlock(&dep->qlock);
@@ -2436,8 +2458,7 @@ erts_dist_command(Port *prt, int reds_limit)
erts_mtx_unlock(&dep->qlock);
}
- ASSERT(foq.first || !foq.last);
- ASSERT(!foq.first || foq.last);
+ ASSERT(!!foq.first == !!foq.last);
ASSERT(!dep->finalized_out_queue.first);
ASSERT(!dep->finalized_out_queue.last);
@@ -2447,10 +2468,10 @@ erts_dist_command(Port *prt, int reds_limit)
}
/* Avoid wrapping reduction counter... */
- if (reds > INT_MAX/2)
- reds = INT_MAX/2;
+ if (reds < INT_MIN/2)
+ reds = INT_MIN/2;
- return reds;
+ return initial_reds - reds;
preempted:
/*
@@ -2458,8 +2479,7 @@ erts_dist_command(Port *prt, int reds_limit)
* since last call to driver.
*/
- ASSERT(oq.first || !oq.last);
- ASSERT(!oq.first || oq.last);
+ ASSERT(!!oq.first == !!oq.last);
if (sched_flags & ERTS_PTS_FLG_EXIT) {
/*
@@ -2483,12 +2503,6 @@ erts_dist_command(Port *prt, int reds_limit)
foq.first = NULL;
foq.last = NULL;
-
-#ifdef DEBUG
- erts_mtx_lock(&dep->qlock);
- ASSERT(erts_atomic_read_nob(&dep->qsize) == obufsize);
- erts_mtx_unlock(&dep->qlock);
-#endif
}
else {
if (oq.first) {
@@ -2778,7 +2792,8 @@ BIF_RETTYPE
dist_ctrl_get_data_1(BIF_ALIST_1)
{
DistEntry *dep = ERTS_PROC_GET_DIST_ENTRY(BIF_P);
- int reds = 1;
+ const Sint initial_reds = ERTS_BIF_REDS_LEFT(BIF_P);
+ Sint reds = initial_reds;
ErtsDistOutputBuf *obuf;
Eterm *hp;
ProcBin *pb;
@@ -2809,6 +2824,7 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
{
if (!dep->tmp_out_queue.first) {
ASSERT(!dep->tmp_out_queue.last);
+ ASSERT(!dep->transcode_ctx);
qsize = erts_atomic_read_acqb(&dep->qsize);
if (qsize > 0) {
erts_mtx_lock(&dep->qlock);
@@ -2826,21 +2842,18 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
erts_de_runlock(dep);
BIF_RET(am_none);
}
- else {
- obuf = dep->tmp_out_queue.first;
- dep->tmp_out_queue.first = obuf->next;
- if (!obuf->next)
- dep->tmp_out_queue.last = NULL;
+
+ obuf = dep->tmp_out_queue.first;
+ reds = erts_encode_ext_dist_header_finalize(obuf, dep, dep->flags, reds);
+ if (reds < 0) {
+ erts_de_runlock(dep);
+ ERTS_BIF_YIELD1(bif_export[BIF_dist_ctrl_get_data_1],
+ BIF_P, BIF_ARG_1);
}
- obuf->extp = erts_encode_ext_dist_header_finalize(obuf->extp,
- dep->cache,
- dep->flags);
- reds += ERTS_PORT_REDS_DIST_CMD_FINALIZE;
- if (!(dep->flags & DFLAG_DIST_HDR_ATOM_CACHE))
- *--obuf->extp = PASS_THROUGH; /* 'pass through' needed */
- ASSERT(&obuf->data[0] <= obuf->extp
- && obuf->extp < obuf->ext_endp);
+ dep->tmp_out_queue.first = obuf->next;
+ if (!obuf->next)
+ dep->tmp_out_queue.last = NULL;
}
erts_atomic64_inc_nob(&dep->out);
@@ -2868,11 +2881,11 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
erts_mtx_unlock(&dep->qlock);
if (resume_procs) {
int resumed = erts_resume_processes(resume_procs);
- reds += resumed*ERTS_PORT_REDS_DIST_CMD_RESUMED;
+ reds -= resumed*ERTS_PORT_REDS_DIST_CMD_RESUMED;
}
}
- BIF_RET2(make_binary(pb), reds);
+ BIF_RET2(make_binary(pb), (initial_reds - reds));
}
void
@@ -2894,24 +2907,31 @@ erts_dist_port_not_busy(Port *prt)
erts_schedule_dist_command(prt, NULL);
}
+static void kill_connection(DistEntry *dep)
+{
+ ERTS_LC_ASSERT(erts_lc_is_de_rwlocked(dep));
+ ASSERT(dep->status == ERTS_DE_SFLG_CONNECTED);
+
+ dep->status |= ERTS_DE_SFLG_EXITING;
+ erts_mtx_lock(&dep->qlock);
+ ASSERT(!(erts_atomic32_read_nob(&dep->qflgs) & ERTS_DE_QFLG_EXIT));
+ erts_atomic32_read_bor_nob(&dep->qflgs, ERTS_DE_QFLG_EXIT);
+ erts_mtx_unlock(&dep->qlock);
+
+ if (is_internal_port(dep->cid))
+ erts_schedule_dist_command(NULL, dep);
+ else if (is_internal_pid(dep->cid))
+ schedule_kill_dist_ctrl_proc(dep->cid);
+}
+
void
erts_kill_dist_connection(DistEntry *dep, Uint32 connection_id)
{
erts_de_rwlock(dep);
if (connection_id == dep->connection_id
- && !(dep->status & ERTS_DE_SFLG_EXITING)) {
+ && dep->status == ERTS_DE_SFLG_CONNECTED) {
- dep->status |= ERTS_DE_SFLG_EXITING;
-
- erts_mtx_lock(&dep->qlock);
- ASSERT(!(erts_atomic32_read_nob(&dep->qflgs) & ERTS_DE_QFLG_EXIT));
- erts_atomic32_read_bor_nob(&dep->qflgs, ERTS_DE_QFLG_EXIT);
- erts_mtx_unlock(&dep->qlock);
-
- if (is_internal_port(dep->cid))
- erts_schedule_dist_command(NULL, dep);
- else if (is_internal_pid(dep->cid))
- schedule_kill_dist_ctrl_proc(dep->cid);
+ kill_connection(dep);
}
erts_de_rwunlock(dep);
}
@@ -3071,6 +3091,10 @@ int distribution_info(fmtfn_t to, void *arg) /* Called by break handler */
info_dist_entry(to, arg, dep, 0, 1);
}
+ for (dep = erts_pending_dist_entries; dep; dep = dep->next) {
+ info_dist_entry(to, arg, dep, 0, 0);
+ }
+
for (dep = erts_not_connected_dist_entries; dep; dep = dep->next) {
if (dep != erts_this_dist_entry) {
info_dist_entry(to, arg, dep, 0, 0);
@@ -3093,7 +3117,6 @@ int distribution_info(fmtfn_t to, void *arg) /* Called by break handler */
monitor_node -- turn on/off node monitoring
node controller only:
- dist_exit/3 -- send exit signals from remote to local process
dist_link/2 -- link a remote process to a local
dist_unlink/2 -- unlink a remote from a local
****************************************************************************/
@@ -3103,15 +3126,6 @@ int distribution_info(fmtfn_t to, void *arg) /* Called by break handler */
/**********************************************************************
** Set the node name of current node fail if node already is set.
** setnode(name@host, Creation)
- ** loads functions pointer to trap_functions from module erlang.
- ** erlang:dsend/2
- ** erlang:dlink/1
- ** erlang:dunlink/1
- ** erlang:dmonitor_node/3
- ** erlang:dgroup_leader/2
- ** erlang:dexit/2
- ** -- are these needed ?
- ** dexit/1
***********************************************************************/
BIF_RETTYPE setnode_2(BIF_ALIST_2)
@@ -3135,15 +3149,8 @@ BIF_RETTYPE setnode_2(BIF_ALIST_2)
goto error;
/* Check that all trap functions are defined !! */
- if (dsend2_trap->addressv[0] == NULL ||
- dsend3_trap->addressv[0] == NULL ||
- /* dsend_nosuspend_trap->address == NULL ||*/
- dlink_trap->addressv[0] == NULL ||
- dunlink_trap->addressv[0] == NULL ||
- dmonitor_node_trap->addressv[0] == NULL ||
- dgroup_leader_trap->addressv[0] == NULL ||
- dmonitor_p_trap->addressv[0] == NULL ||
- dexit_trap->addressv[0] == NULL) {
+ if (dmonitor_node_trap->addressv[0] == NULL ||
+ dmonitor_p_trap->addressv[0] == NULL) {
goto error;
}
@@ -3220,6 +3227,8 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
ErtsProcLocks proc_unlock = 0;
Process *proc;
Port *pp = NULL;
+ Eterm notify_proc;
+ erts_aint32_t qflgs;
/*
* Check and pick out arguments
@@ -3247,21 +3256,25 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
if (!is_atom(ic) || !is_atom(oc))
goto badarg;
- /* DFLAG_EXTENDED_REFERENCES is compulsory from R9 and forward */
- if (!(DFLAG_EXTENDED_REFERENCES & flags)) {
+ if (~flags & DFLAG_DIST_MANDATORY) {
erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
erts_dsprintf(dsbufp, "%T", BIF_P->common.id);
if (BIF_P->common.u.alive.reg)
erts_dsprintf(dsbufp, " (%T)", BIF_P->common.u.alive.reg->name);
erts_dsprintf(dsbufp,
" attempted to enable connection to node %T "
- "which is not able to handle extended references.\n",
+ "which does not support all mandatory capabilities.\n",
BIF_ARG_1);
erts_send_error_to_logger(BIF_P->group_leader, dsbufp);
goto badarg;
}
/*
+ * ToDo: Should we not pass connection_id as well
+ * to make sure it's the right connection we commit.
+ */
+
+ /*
* Arguments seem to be in order.
*/
@@ -3304,6 +3317,23 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
goto badarg;
}
+ if (dep->status & ERTS_DE_SFLG_EXITING) {
+ /* Suspend on dist entry waiting for the exit to finish */
+ ErtsProcList *plp = erts_proclist_create(BIF_P);
+ plp->next = NULL;
+ erts_suspend(BIF_P, ERTS_PROC_LOCK_MAIN, NULL);
+ erts_mtx_lock(&dep->qlock);
+ erts_proclist_store_last(&dep->suspended, plp);
+ erts_mtx_unlock(&dep->qlock);
+ goto yield;
+ }
+ if (dep->status != ERTS_DE_SFLG_PENDING) {
+ if (dep->status == 0)
+ erts_set_dist_entry_pending(dep);
+ else
+ goto badarg;
+ }
+
if (is_not_nil(dep->cid))
goto badarg;
@@ -3346,8 +3376,12 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
erts_mtx_unlock(&dep->qlock);
goto yield;
}
-
- ASSERT(!(dep->status & ERTS_DE_SFLG_EXITING));
+ if (dep->status != ERTS_DE_SFLG_PENDING) {
+ if (dep->status == 0)
+ erts_set_dist_entry_pending(dep);
+ else
+ goto badarg;
+ }
if (pp->dist_entry || is_not_nil(dep->cid))
goto badarg;
@@ -3378,7 +3412,8 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
dep->creation = 0;
#ifdef DEBUG
- ASSERT(erts_atomic_read_nob(&dep->qsize) == 0);
+ ASSERT(erts_atomic_read_nob(&dep->qsize) == 0
+ || (dep->status & ERTS_DE_SFLG_PENDING));
#endif
if (flags & DFLAG_DIST_HDR_ATOM_CACHE)
@@ -3386,7 +3421,26 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
erts_set_dist_entry_connected(dep, BIF_ARG_2, flags);
+ notify_proc = NIL;
+ if (erts_atomic_read_nob(&dep->qsize)) {
+ if (is_internal_port(dep->cid)) {
+ erts_schedule_dist_command(NULL, dep);
+ }
+ else {
+ qflgs = erts_atomic32_read_nob(&dep->qflgs);
+ if (qflgs & ERTS_DE_QFLG_REQ_INFO) {
+ qflgs = erts_atomic32_read_band_mb(&dep->qflgs,
+ ~ERTS_DE_QFLG_REQ_INFO);
+ if (qflgs & ERTS_DE_QFLG_REQ_INFO) {
+ notify_proc = dep->cid;
+ ASSERT(is_internal_pid(notify_proc));
+ }
+ }
+ }
+ }
erts_de_rwunlock(dep);
+ if (is_internal_pid(notify_proc))
+ notify_dist_data(BIF_P, notify_proc);
ERTS_BIF_PREP_RET(ret, erts_make_dhandle(BIF_P, dep));
@@ -3428,79 +3482,168 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
goto done;
}
+BIF_RETTYPE erts_internal_new_connection_1(BIF_ALIST_1)
+{
+ DistEntry* dep;
+ Uint32 conn_id;
+ Eterm* hp;
+ Eterm dhandle;
-/**********************************************************************/
-/* dist_exit(Local, Term, Remote) -> Bool */
+ if (is_not_atom(BIF_ARG_1)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+ dep = erts_find_or_insert_dist_entry(BIF_ARG_1);
+
+ if (dep == erts_this_dist_entry) {
+ erts_deref_dist_entry(dep);
+ BIF_ERROR(BIF_P, BADARG);
+ }
+
+ erts_de_rwlock(dep);
+
+ if (ERTS_DE_IS_CONNECTED(dep) || dep->status & ERTS_DE_SFLG_PENDING)
+ conn_id = dep->connection_id;
+ else if (dep->status == 0) {
+ erts_set_dist_entry_pending(dep);
+ conn_id = dep->connection_id;
+ }
+ else {
+ ASSERT(dep->status & ERTS_DE_SFLG_EXITING);
+ conn_id = (dep->connection_id + 1) & ERTS_DIST_CON_ID_MASK;
+ }
+ erts_de_rwunlock(dep);
+ hp = HAlloc(BIF_P, 3 + ERTS_MAGIC_REF_THING_SIZE);
+ dhandle = erts_build_dhandle(&hp, &BIF_P->off_heap, dep);
+ erts_deref_dist_entry(dep);
+ BIF_RET(TUPLE2(hp, make_small(conn_id), dhandle));
+}
-BIF_RETTYPE dist_exit_3(BIF_ALIST_3)
+static Sint abort_connection(DistEntry* dep, Uint32 conn_id)
{
- Eterm local;
- Eterm remote;
- DistEntry *rdep;
+ erts_de_rwlock(dep);
- local = BIF_ARG_1;
- remote = BIF_ARG_3;
+ if (dep->connection_id != conn_id)
+ ;
+ else if (dep->status == ERTS_DE_SFLG_CONNECTED) {
+ kill_connection(dep);
+ }
+ else if (dep->status == ERTS_DE_SFLG_PENDING) {
+ NetExitsContext nec = {dep};
+ ErtsLink *nlinks;
+ ErtsLink *node_links;
+ ErtsMonitor *monitors;
+ ErtsAtomCache *cache;
+ ErtsDistOutputBuf *obuf;
+ ErtsProcList *resume_procs;
+ Sint reds = 0;
+
+ ASSERT(is_nil(dep->cid));
- /* Check that remote is a remote process */
- if (is_not_external_pid(remote))
- goto error;
+ erts_de_links_lock(dep);
+ monitors = dep->monitors;
+ nlinks = dep->nlinks;
+ node_links = dep->node_links;
+ dep->monitors = NULL;
+ dep->nlinks = NULL;
+ dep->node_links = NULL;
+ erts_de_links_unlock(dep);
- rdep = external_dist_entry(remote);
-
- if(rdep == erts_this_dist_entry)
- goto error;
+ cache = dep->cache;
+ dep->cache = NULL;
+ erts_mtx_lock(&dep->qlock);
+ obuf = dep->out_queue.first;
+ dep->out_queue.first = NULL;
+ dep->out_queue.last = NULL;
+ ASSERT(!dep->tmp_out_queue.first);
+ ASSERT(!dep->finalized_out_queue.first);
+ resume_procs = get_suspended_on_de(dep, ERTS_DE_QFLGS_ALL);
+ erts_mtx_unlock(&dep->qlock);
+ erts_atomic_set_nob(&dep->dist_cmd_scheduled, 0);
+ dep->send = NULL;
- /* Check that local is local */
- if (is_internal_pid(local)) {
- Process *lp;
- ErtsProcLocks lp_locks;
- if (BIF_P->common.id == local) {
- lp_locks = ERTS_PROC_LOCKS_ALL;
- lp = BIF_P;
- erts_proc_lock(BIF_P, ERTS_PROC_LOCKS_ALL_MINOR);
- }
- else {
- lp_locks = ERTS_PROC_LOCKS_XSIG_SEND;
- lp = erts_pid2proc(BIF_P, ERTS_PROC_LOCK_MAIN,
- local, lp_locks);
- if (!lp) {
- BIF_RET(am_true); /* ignore */
- }
- }
-
- (void) erts_send_exit_signal(BIF_P,
- remote,
- lp,
- &lp_locks,
- BIF_ARG_2,
- NIL,
- NULL,
- 0);
- if (lp == BIF_P)
- lp_locks &= ~ERTS_PROC_LOCK_MAIN;
- erts_proc_unlock(lp, lp_locks);
- if (lp == BIF_P) {
- erts_aint32_t state = erts_atomic32_read_acqb(&BIF_P->state);
- /*
- * We may have exited current process and may have to take action.
- */
- if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) {
- if (state & ERTS_PSFLG_PENDING_EXIT)
- erts_handle_pending_exit(BIF_P, ERTS_PROC_LOCK_MAIN);
- ERTS_BIF_EXITED(BIF_P);
- }
- }
+ erts_set_dist_entry_not_connected(dep);
+
+ erts_de_rwunlock(dep);
+
+ erts_sweep_monitors(monitors, &doit_monitor_net_exits, &nec);
+ erts_sweep_links(nlinks, &doit_link_net_exits, &nec);
+ erts_sweep_links(node_links, &doit_node_link_net_exits, &nec);
+
+ if (resume_procs) {
+ int resumed = erts_resume_processes(resume_procs);
+ reds += resumed*ERTS_PORT_REDS_DIST_CMD_RESUMED;
+ }
+
+ delete_cache(cache);
+ free_de_out_queues(dep, obuf);
+ return reds;
}
- else if (is_external_pid(local)
- && external_dist_entry(local) == erts_this_dist_entry) {
- BIF_RET(am_true); /* ignore */
+ erts_de_rwunlock(dep);
+ return 0;
+}
+
+BIF_RETTYPE erts_internal_abort_connection_2(BIF_ALIST_2)
+{
+ DistEntry* dep;
+ Eterm* tp;
+
+ if (is_not_atom(BIF_ARG_1) || is_not_tuple_arity(BIF_ARG_2, 2)) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+ tp = tuple_val(BIF_ARG_2);
+ dep = erts_dhandle_to_dist_entry(tp[2]);
+ if (is_not_small(tp[1]) || dep != erts_find_dist_entry(BIF_ARG_1)
+ || dep == erts_this_dist_entry) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+
+ if (dep) {
+ Sint reds = abort_connection(dep, unsigned_val(tp[1]));
+ BUMP_REDS(BIF_P, reds);
}
- else
- goto error;
BIF_RET(am_true);
+}
- error:
- BIF_ERROR(BIF_P, BADARG);
+int erts_auto_connect(DistEntry* dep, Process *proc, ErtsProcLocks proc_locks)
+{
+ erts_de_rwlock(dep);
+ if (dep->status != 0) {
+ erts_de_rwunlock(dep);
+ }
+ else {
+ Process* net_kernel;
+ ErtsProcLocks nk_locks = ERTS_PROC_LOCK_MSGQ;
+ Eterm *hp;
+ ErlOffHeap *ohp;
+ ErtsMessage *mp;
+ Eterm msg, dhandle;
+ Uint32 conn_id;
+
+ erts_set_dist_entry_pending(dep);
+ conn_id = dep->connection_id;
+ erts_de_rwunlock(dep);
+
+ net_kernel = erts_whereis_process(proc, proc_locks,
+ am_net_kernel, nk_locks, 0);
+ if (!net_kernel) {
+ abort_connection(dep, conn_id);
+ return 0;
+ }
+
+ /*
+ * Send {auto_connect, Node, ConnId, DHandle} to net_kernel
+ */
+ mp = erts_alloc_message_heap(net_kernel, &nk_locks,
+ 5 + ERTS_MAGIC_REF_THING_SIZE,
+ &hp, &ohp);
+ dhandle = erts_build_dhandle(&hp, ohp, dep);
+ msg = TUPLE4(hp, am_auto_connect, dep->sysname, make_small(conn_id),
+ dhandle);
+ erts_queue_message(net_kernel, nk_locks, mp, msg, proc->common.id);
+ erts_proc_unlock(net_kernel, nk_locks);
+ }
+
+ return 1;
}
/**********************************************************************/
@@ -3576,9 +3719,11 @@ BIF_RETTYPE nodes_1(BIF_ALIST_1)
ASSERT(erts_no_of_not_connected_dist_entries > 0);
ASSERT(erts_no_of_hidden_dist_entries >= 0);
+ ASSERT(erts_no_of_pending_dist_entries >= 0);
ASSERT(erts_no_of_visible_dist_entries >= 0);
if(not_connected)
- length += (erts_no_of_not_connected_dist_entries - 1);
+ length += ((erts_no_of_not_connected_dist_entries - 1)
+ + erts_no_of_pending_dist_entries);
if(hidden)
length += erts_no_of_hidden_dist_entries;
if(visible)
@@ -3598,13 +3743,18 @@ BIF_RETTYPE nodes_1(BIF_ALIST_1)
#ifdef DEBUG
endp = hp + length*2;
#endif
- if(not_connected)
+ if(not_connected) {
for(dep = erts_not_connected_dist_entries; dep; dep = dep->next) {
if (dep != erts_this_dist_entry) {
result = CONS(hp, dep->sysname, result);
hp += 2;
}
+ }
+ for(dep = erts_pending_dist_entries; dep; dep = dep->next) {
+ result = CONS(hp, dep->sysname, result);
+ hp += 2;
}
+ }
if(hidden)
for(dep = erts_hidden_dist_entries; dep; dep = dep->next) {
result = CONS(hp, dep->sysname, result);
@@ -3649,11 +3799,17 @@ monitor_node(Process* p, Eterm Node, Eterm Bool, Eterm Options)
DistEntry *dep;
ErtsLink *lnk;
Eterm l;
+ int async_connect = 1;
for (l = Options; l != NIL && is_list(l); l = CDR(list_val(l))) {
Eterm t = CAR(list_val(l));
- /* allow_passive_connect the only available option right now */
- if (t != am_allow_passive_connect) {
+ if (t == am_allow_passive_connect) {
+ /*
+ * Handle this horrible feature by falling back on old synchronous
+ * auto-connect (if needed)
+ */
+ async_connect = 0;
+ } else {
BIF_ERROR(p, BADARG);
}
}
@@ -3667,50 +3823,90 @@ monitor_node(Process* p, Eterm Node, Eterm Bool, Eterm Options)
&& (Node != erts_this_node->sysname))) {
BIF_ERROR(p, BADARG);
}
- dep = erts_sysname_to_connected_dist_entry(Node);
- if (!dep) {
- do_trap:
- BIF_TRAP3(dmonitor_node_trap, p, Node, Bool, Options);
- }
- if (dep == erts_this_dist_entry)
- goto done;
-
- erts_proc_lock(p, ERTS_PROC_LOCK_LINK);
- erts_de_rlock(dep);
- if (ERTS_DE_IS_NOT_CONNECTED(dep)) {
- erts_proc_unlock(p, ERTS_PROC_LOCK_LINK);
- erts_de_runlock(dep);
- goto do_trap;
- }
- erts_de_links_lock(dep);
- erts_de_runlock(dep);
if (Bool == am_true) {
- ASSERT(dep->cid != NIL);
- lnk = erts_add_or_lookup_link(&(dep->node_links), LINK_NODE,
- p->common.id);
- ++ERTS_LINK_REFC(lnk);
- lnk = erts_add_or_lookup_link(&ERTS_P_LINKS(p), LINK_NODE, Node);
- ++ERTS_LINK_REFC(lnk);
- }
- else {
- lnk = erts_lookup_link(dep->node_links, p->common.id);
- if (lnk != NULL) {
- if ((--ERTS_LINK_REFC(lnk)) == 0) {
- erts_destroy_link(erts_remove_link(&(dep->node_links),
- p->common.id));
- }
- }
- lnk = erts_lookup_link(ERTS_P_LINKS(p), Node);
- if (lnk != NULL) {
- if ((--ERTS_LINK_REFC(lnk)) == 0) {
- erts_destroy_link(erts_remove_link(&ERTS_P_LINKS(p),
- Node));
+ ErtsDSigData dsd;
+ dsd.node = Node;
+ dep = erts_find_or_insert_dist_entry(Node);
+ if (dep == erts_this_dist_entry)
+ goto done;
+
+ erts_proc_lock(p, ERTS_PROC_LOCK_LINK);
+
+ switch (erts_dsig_prepare(&dsd, dep, p,
+ (ERTS_PROC_LOCK_MAIN | ERTS_PROC_LOCK_LINK),
+ ERTS_DSP_RLOCK, 0, async_connect)) {
+ case ERTS_DSIG_PREP_NOT_ALIVE:
+ case ERTS_DSIG_PREP_NOT_CONNECTED:
+ /* Trap to either send 'nodedown' or do passive connection attempt */
+ trap:
+ erts_proc_unlock(p, ERTS_PROC_LOCK_LINK);
+ erts_deref_dist_entry(dep);
+ BIF_TRAP3(dmonitor_node_trap, p, Node, Bool, Options);
+ case ERTS_DSIG_PREP_PENDING:
+ if (!async_connect) {
+ /*
+ * Pending connection may fail, so we must trap
+ * to ensure passive connection attempt
+ */
+ erts_de_runlock(dep);
+ goto trap;
}
- }
+ /*fall through*/
+ case ERTS_DSIG_PREP_CONNECTED:
+ erts_de_links_lock(dep);
+ erts_de_runlock(dep);
+ lnk = erts_add_or_lookup_link(&(dep->node_links), LINK_NODE,
+ p->common.id);
+ ++ERTS_LINK_REFC(lnk);
+ lnk = erts_add_or_lookup_link(&ERTS_P_LINKS(p), LINK_NODE, Node);
+ ++ERTS_LINK_REFC(lnk);
+ erts_de_links_unlock(dep);
+ break;
+ default:
+ ERTS_ASSERT(! "Invalid dsig prepare result");
+ }
+ erts_deref_dist_entry(dep);
+ }
+ else { /* Bool == false */
+ dep = erts_sysname_to_connected_dist_entry(Node);
+ if (!dep) {
+ /*
+ * Before OTP-21 this case triggered auto-connect
+ * and a 'nodedown' message if that failed.
+ * Now it's a simple no-op which feels more reasonable.
+ */
+ BIF_RET(am_true);
+ }
+ if (dep == erts_this_dist_entry)
+ goto done;
+
+ erts_proc_lock(p, ERTS_PROC_LOCK_LINK);
+ erts_de_rlock(dep);
+ if (!(dep->status & (ERTS_DE_SFLG_PENDING | ERTS_DE_SFLG_CONNECTED))) {
+ erts_proc_unlock(p, ERTS_PROC_LOCK_LINK);
+ erts_de_runlock(dep);
+ goto done;
+ }
+ erts_de_links_lock(dep);
+ erts_de_runlock(dep);
+ lnk = erts_lookup_link(dep->node_links, p->common.id);
+ if (lnk != NULL) {
+ if ((--ERTS_LINK_REFC(lnk)) == 0) {
+ erts_destroy_link(erts_remove_link(&(dep->node_links),
+ p->common.id));
+ }
+ }
+ lnk = erts_lookup_link(ERTS_P_LINKS(p), Node);
+ if (lnk != NULL) {
+ if ((--ERTS_LINK_REFC(lnk)) == 0) {
+ erts_destroy_link(erts_remove_link(&ERTS_P_LINKS(p),
+ Node));
+ }
+ }
+ erts_de_links_unlock(dep);
}
- erts_de_links_unlock(dep);
erts_proc_unlock(p, ERTS_PROC_LOCK_LINK);
done: