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authorSverker Eriksson <[email protected]>2018-02-26 15:36:34 +0100
committerSverker Eriksson <[email protected]>2018-03-02 19:16:48 +0100
commit337919abe6ed9a97e15d5f471ef8f79d44cb8363 (patch)
treeea9669087d2a27cf1fede34ba802995b9d0d56e1 /erts/emulator/beam
parent9a472f2899519234198f677269c5e70362bec351 (diff)
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erts,kernel: Add erts_internal:get_dflags/0
for kernel to ask erts about distribution flags and keep this info in one place.
Diffstat (limited to 'erts/emulator/beam')
-rw-r--r--erts/emulator/beam/atom.names1
-rw-r--r--erts/emulator/beam/bif.tab1
-rw-r--r--erts/emulator/beam/dist.c21
-rw-r--r--erts/emulator/beam/dist.h37
-rw-r--r--erts/emulator/beam/erl_node_tables.c2
5 files changed, 55 insertions, 7 deletions
diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names
index 42a368cdd8..b40d9a325b 100644
--- a/erts/emulator/beam/atom.names
+++ b/erts/emulator/beam/atom.names
@@ -250,6 +250,7 @@ atom error_handler
atom error_logger
atom erts_code_purger
atom erts_debug
+atom erts_dflags
atom erts_internal
atom ets
atom ETS_TRANSFER='ETS-TRANSFER'
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index 0d1166f6ed..be653ee2a0 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -690,6 +690,7 @@ bif erlang:iolist_to_iovec/1
# New in 21.0
#
+bif erts_internal:get_dflags/0
bif erts_internal:new_connection/1
bif erts_internal:abort_connection/2
bif erts_internal:map_next/3
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index 30390cdb5e..6f122273dc 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -641,6 +641,13 @@ trap_function(Eterm func, int arity)
return erts_export_put(am_erlang, func, arity);
}
+/*
+ * Sync with dist_util.erl:
+ *
+ * -record(erts_dflags, {default, mandatory, addable, rejectable}).
+ */
+static Eterm erts_dflags_record;
+
void init_dist(void)
{
init_nodes_monitors();
@@ -657,6 +664,15 @@ void init_dist(void)
dist_ctrl_put_data_trap = erts_export_put(am_erts_internal,
am_dist_ctrl_put_data,
2);
+ {
+ Eterm* hp = erts_alloc(ERTS_ALC_T_LITERAL, (1+5)*sizeof(Eterm));
+ erts_dflags_record = TUPLE5(hp, am_erts_dflags,
+ make_small(DFLAG_DIST_DEFAULT),
+ make_small(DFLAG_DIST_MANDATORY),
+ make_small(DFLAG_DIST_ADDABLE),
+ make_small(DFLAG_DIST_REJECTABLE));
+ erts_set_literal_tag(&erts_dflags_record, hp, (1+5));
+ }
}
#define ErtsDistOutputBuf2Binary(OB) \
@@ -3506,6 +3522,11 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3)
goto done;
}
+BIF_RETTYPE erts_internal_get_dflags_0(BIF_ALIST_0)
+{
+ return erts_dflags_record;
+}
+
BIF_RETTYPE erts_internal_new_connection_1(BIF_ALIST_1)
{
DistEntry* dep;
diff --git a/erts/emulator/beam/dist.h b/erts/emulator/beam/dist.h
index ea4697815f..202457bb3b 100644
--- a/erts/emulator/beam/dist.h
+++ b/erts/emulator/beam/dist.h
@@ -40,26 +40,51 @@
#define DFLAG_UNICODE_IO 0x1000
#define DFLAG_DIST_HDR_ATOM_CACHE 0x2000
#define DFLAG_SMALL_ATOM_TAGS 0x4000
-#define DFLAG_INTERNAL_TAGS 0x8000
+#define DFLAG_INTERNAL_TAGS 0x8000 /* used by ETS 'compressed' option */
#define DFLAG_UTF8_ATOMS 0x10000
#define DFLAG_MAP_TAG 0x20000
#define DFLAG_BIG_CREATION 0x40000
#define DFLAG_SEND_SENDER 0x80000
-#define DFLAG_NO_MAGIC 0x100000
+#define DFLAG_NO_MAGIC 0x100000 /* internal for pending connection */
-/* Mandatory flags for distribution (sync with dist_util.erl) */
+/* Mandatory flags for distribution */
#define DFLAG_DIST_MANDATORY (DFLAG_EXTENDED_REFERENCES \
| DFLAG_EXTENDED_PIDS_PORTS \
| DFLAG_UTF8_ATOMS \
| DFLAG_NEW_FUN_TAGS)
-/* Additional optimistic flags when encoding toward pending connection */
-#define DFLAG_DIST_HOPEFULLY (DFLAG_NO_MAGIC \
- | DFLAG_EXPORT_PTR_TAG \
+/*
+ * Additional optimistic flags when encoding toward pending connection.
+ * If remote node does not supporting these (erl_interface)
+ * then we will need to transcode all messages enqueued before
+ * connection setup was finished.
+ */
+#define DFLAG_DIST_HOPEFULLY (DFLAG_EXPORT_PTR_TAG \
| DFLAG_BIT_BINARIES \
| DFLAG_DIST_MONITOR \
| DFLAG_DIST_MONITOR_NAME)
+/* Our preferred set of flags. Used for connection setup handshake */
+#define DFLAG_DIST_DEFAULT (DFLAG_DIST_MANDATORY | DFLAG_DIST_HOPEFULLY \
+ | DFLAG_FUN_TAGS \
+ | DFLAG_NEW_FLOATS \
+ | DFLAG_UNICODE_IO \
+ | DFLAG_DIST_HDR_ATOM_CACHE \
+ | DFLAG_SMALL_ATOM_TAGS \
+ | DFLAG_UTF8_ATOMS \
+ | DFLAG_MAP_TAG \
+ | DFLAG_BIG_CREATION \
+ | DFLAG_SEND_SENDER)
+
+/* Flags addable by local distr implementations */
+#define DFLAG_DIST_ADDABLE DFLAG_DIST_DEFAULT
+
+/* Flags rejectable by local distr implementation */
+#define DFLAG_DIST_REJECTABLE (DFLAG_DIST_HDR_ATOM_CACHE \
+ | DFLAG_HIDDEN_ATOM_CACHE \
+ | DFLAG_ATOM_CACHE)
+
+
/* All flags that should be enabled when term_to_binary/1 is used. */
#define TERM_TO_BINARY_DFLAGS (DFLAG_EXTENDED_REFERENCES \
| DFLAG_NEW_FUN_TAGS \
diff --git a/erts/emulator/beam/erl_node_tables.c b/erts/emulator/beam/erl_node_tables.c
index eaf133f5c0..088b087ebb 100644
--- a/erts/emulator/beam/erl_node_tables.c
+++ b/erts/emulator/beam/erl_node_tables.c
@@ -628,7 +628,7 @@ erts_set_dist_entry_pending(DistEntry *dep)
erts_no_of_not_connected_dist_entries--;
dep->status = ERTS_DE_SFLG_PENDING;
- dep->flags = (DFLAG_DIST_MANDATORY | DFLAG_DIST_HOPEFULLY);
+ dep->flags = (DFLAG_DIST_MANDATORY | DFLAG_DIST_HOPEFULLY | DFLAG_NO_MAGIC);
dep->connection_id = (dep->connection_id + 1) & ERTS_DIST_CON_ID_MASK;
dep->prev = NULL;