1 files changed, 122 insertions, 0 deletions

diff --git a/lib/libtle_glue/fd.c b/lib/libtle_glue/fd.c
new file mode 100644
index 0000000..cc855f9
--- /dev/null
+++ b/lib/libtle_glue/fd.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2018 Ant Financial Services Group.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <string.h>
+
+#include "fd.h"
+#include "log.h"
+#include "util.h"
+#include "config.h"
+
+bool fd_table_initialized;
+
+struct fd_table fd_table = { .fd_base = INT_MAX, };
+
+static int
+get_ulimit_nofile(void)
+{
+	struct rlimit rlim;
+
+#define GLUE_BASE_FD 1024
+	if (getrlimit(RLIMIT_NOFILE, &rlim) < 0)
+		return GLUE_BASE_FD;
+
+	return rlim.rlim_cur; /* soft limit, rlim_max is the hard limit */
+}
+
+static void
+fd_num_set(int *fd_base, int *fd_num)
+{
+	int limit = get_ulimit_nofile();
+
+	/* fix me: alignment of power of two */
+	/* fix me: use dup2 to occupy these fds */
+	*fd_num = limit / 2;
+	*fd_num = RTE_MIN(MAX_STREAMS_PER_CORE * 2 * MAX_NB_CTX, *fd_num);
+
+	*fd_base = limit - *fd_num;
+	GLUE_LOG(INFO, "fd_base = %d, fd_num = %d", *fd_base, *fd_num);
+}
+
+static void
+add_fd(struct rte_mempool *mp __rte_unused, void *opaque __rte_unused,
+       void *obj, unsigned obj_idx)
+{
+	((struct sock *)obj)->fd = obj_idx + fd_table.fd_base;
+	fd_table.socks[obj_idx] = obj;
+}
+
+void
+fd_init(void)
+{
+	int ret;
+	size_t sz;
+	uint32_t socket_id;
+	int fd_base, fd_num;
+	struct rte_mempool *mp = NULL;
+	char name[RTE_MEMPOOL_NAMESIZE];
+
+	socket_id = get_socket_id();
+
+	fd_num_set(&fd_base, &fd_num);
+
+	sz = sizeof(fd_table.socks[0]) * fd_num;
+	fd_table.socks = rte_zmalloc_socket("fdtable", sz,
+				RTE_CACHE_LINE_SIZE, socket_id);
+	if (fd_table.socks == NULL) {
+		GLUE_LOG(ERR, "Failed to malloc fd table");
+		goto err;
+	}
+
+	snprintf(name, RTE_MEMPOOL_NAMESIZE, "mp_fd_%d_%d", fd_base, fd_num);
+	mp = rte_mempool_create_empty(name, fd_num - 1, sizeof(struct sock),
+				      32, 0, socket_id, MEMPOOL_F_DYNAMIC);
+	if (mp == NULL) {
+		GLUE_LOG(ERR, "Failed to create mp for fd table");
+		goto err;
+	}
+
+	GLUE_LOG(INFO, "sizeof(struct sock): %lu, elt_size of fd table = %u",
+		 sizeof(struct sock), mp->elt_size);
+
+	ret = rte_mempool_set_ops_byname(mp, "ring_mp_mc", NULL);
+	if (ret != 0) {
+		GLUE_LOG(ERR, "Failed to set mp ops: %d", ret);
+		goto err;
+	}
+
+	rte_mempool_set_dynamic_size(mp, 1024);
+	rte_mempool_set_dynamic_cb(mp, add_fd);
+
+	fd_table.mp = mp;
+	fd_table.fd_base = fd_base;
+	fd_table.fd_num = fd_num;
+
+	/* should populate after fd_table is set */
+	ret = rte_mempool_populate_default(mp);
+	if (ret < 0) {
+		GLUE_LOG(ERR, "Failed to populate mp: %d", ret);
+		goto err;
+	}
+
+	fd_table_initialized = true;
+
+	return;
+err:
+	rte_mempool_free(mp);
+	rte_panic("Failed to init fd_table");
+}