eal: add channel for multi-process communication

[dpdk.git] / lib / librte_eal / common / eal_filesystem.h

diff --git a/lib/librte_eal/common/eal_filesystem.h b/lib/librte_eal/common/eal_filesystem.h
index e8959eb..4708dd5 100644 (file)
--- a/lib/librte_eal/common/eal_filesystem.h
+++ b/lib/librte_eal/common/eal_filesystem.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2010-2014 Intel Corporation
+ * Copyright(c) 2010-2018 Intel Corporation
  */
 
 /**
@@ -38,6 +38,23 @@ eal_runtime_config_path(void)
        return buffer;
 }
 
+/** Path of primary/secondary communication unix socket file. */
+#define MP_SOCKET_PATH_FMT "%s/.%s_unix"
+static inline const char *
+eal_mp_socket_path(void)
+{
+       static char buffer[PATH_MAX]; /* static so auto-zeroed */
+       const char *directory = default_config_dir;
+       const char *home_dir = getenv("HOME");
+
+       if (getuid() != 0 && home_dir != NULL)
+               directory = home_dir;
+       snprintf(buffer, sizeof(buffer) - 1, MP_SOCKET_PATH_FMT,
+                directory, internal_config.hugefile_prefix);
+
+       return buffer;
+}
+
 /** Path of hugepage info file. */
 #define HUGEPAGE_INFO_FMT "%s/.%s_hugepage_info"