[dpdk-dev] [PATCH v4 4/5] eal: don't hardcode socket filter value in IPC

[Anatoly Burakov]

Currently, filter value is hardcoded and disconnected from actual
value returned by eal_mp_socket_path(). Fix this to generate filter
value by deriving it from eal_mp_socket_path() instead.

Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan at intel.com>
---

Notes:
    v4: added filtering for init files as well
    
    v3: no changes
    
    v2: no changes

 lib/librte_eal/common/eal_common_proc.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_proc.c b/lib/librte_eal/common/eal_common_proc.c
index 94672ba..f382184 100644
--- a/lib/librte_eal/common/eal_common_proc.c
+++ b/lib/librte_eal/common/eal_common_proc.c
@@ -402,7 +402,7 @@ socket_is_ready(const char *peer_name)
 }
 
 static int
-unlink_sockets(const char *filter)
+unlink_files(const char *filter)
 {
 	int dir_fd;
 	DIR *mp_dir;
@@ -466,16 +466,22 @@ int
 rte_mp_channel_init(void)
 {
 	char thread_name[RTE_MAX_THREAD_NAME_LEN];
-	char *path;
+	char path[PATH_MAX];
+	char init_filter[PATH_MAX];
 	int dir_fd;
 	pthread_t tid;
 
-	snprintf(mp_filter, PATH_MAX, ".%s_unix_*",
-		 internal_config.hugefile_prefix);
+	/* create filter path */
+	create_socket_path("*", path, sizeof(path));
+	snprintf(mp_filter, sizeof(mp_filter), "%s", basename(path));
 
-	path = strdup(eal_mp_socket_path());
-	snprintf(mp_dir_path, PATH_MAX, "%s", dirname(path));
-	free(path);
+	/* path may have been modified, so recreate it */
+	create_socket_path("*", path, sizeof(path));
+	snprintf(mp_dir_path, sizeof(mp_dir_path), "%s", dirname(path));
+
+	/* also, create init file filter */
+	create_initfile_path("*", path, sizeof(path));
+	snprintf(init_filter, sizeof(init_filter), "%s", basename(path));
 
 	/* lock the directory */
 	dir_fd = open(mp_dir_path, O_RDONLY);
@@ -493,7 +499,8 @@ rte_mp_channel_init(void)
 	}
 
 	if (rte_eal_process_type() == RTE_PROC_PRIMARY &&
-	    unlink_sockets(mp_filter)) {
+			(unlink_files(mp_filter) ||
+			 unlink_files(init_filter))) {
 		RTE_LOG(ERR, EAL, "failed to unlink mp sockets\n");
 		close(dir_fd);
 		return -1;
-- 
2.7.4