eal: export default plugin path to external tools

[dpdk.git] / lib / librte_eal / common / eal_common_options.c

diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index e40f65b..0a594d7 100644 (file)
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -40,6 +40,9 @@
 #include <errno.h>
 #include <getopt.h>
 #include <dlfcn.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
 
 #include <rte_eal.h>
 #include <rte_log.h>
@@ -109,6 +112,18 @@ struct shared_driver {
 static struct shared_driver_list solib_list =
 TAILQ_HEAD_INITIALIZER(solib_list);
 
+/* Default path of external loadable drivers */
+static const char *default_solib_dir = RTE_EAL_PMD_PATH;
+
+/*
+ * Stringified version of solib path used by pmdinfo.py
+ * Note: PLEASE DO NOT ALTER THIS without making a corresponding
+ * change to tools/pmdinfo.py
+ */
+static const char dpdk_solib_path[] __attribute__((used)) =
+"DPDK_PLUGIN_PATH=" RTE_EAL_PMD_PATH;
+
+
 static int master_lcore_parsed;
 static int mem_parsed;
 
@@ -133,7 +148,11 @@ eal_reset_internal_config(struct internal_config *internal_cfg)
 
        internal_cfg->syslog_facility = LOG_DAEMON;
        /* default value from build option */
+#if RTE_LOG_LEVEL >= RTE_LOG_DEBUG
+       internal_cfg->log_level = RTE_LOG_INFO;
+#else
        internal_cfg->log_level = RTE_LOG_LEVEL;
+#endif
 
        internal_cfg->xen_dom0_support = 0;
 
@@ -167,18 +186,69 @@ eal_plugin_add(const char *path)
        return 0;
 }
 
+static int
+eal_plugindir_init(const char *path)
+{
+       DIR *d = NULL;
+       struct dirent *dent = NULL;
+       char sopath[PATH_MAX];
+
+       if (path == NULL || *path == '\0')
+               return 0;
+
+       d = opendir(path);
+       if (d == NULL) {
+               RTE_LOG(ERR, EAL, "failed to open directory %s: %s\n",
+                       path, strerror(errno));
+               return -1;
+       }
+
+       while ((dent = readdir(d)) != NULL) {
+               struct stat sb;
+
+               snprintf(sopath, PATH_MAX-1, "%s/%s", path, dent->d_name);
+               sopath[PATH_MAX-1] = 0;
+
+               if (!(stat(sopath, &sb) == 0 && S_ISREG(sb.st_mode)))
+                       continue;
+
+               if (eal_plugin_add(sopath) == -1)
+                       break;
+       }
+
+       closedir(d);
+       /* XXX this ignores failures from readdir() itself */
+       return (dent == NULL) ? 0 : -1;
+}
+
 int
 eal_plugins_init(void)
 {
        struct shared_driver *solib = NULL;
 
+       if (*default_solib_dir != '\0')
+               eal_plugin_add(default_solib_dir);
+
        TAILQ_FOREACH(solib, &solib_list, next) {
-               RTE_LOG(DEBUG, EAL, "open shared lib %s\n", solib->name);
-               solib->lib_handle = dlopen(solib->name, RTLD_NOW);
-               if (solib->lib_handle == NULL) {
-                       RTE_LOG(ERR, EAL, "%s\n", dlerror());
-                       return -1;
+               struct stat sb;
+
+               if (stat(solib->name, &sb) == 0 && S_ISDIR(sb.st_mode)) {
+                       if (eal_plugindir_init(solib->name) == -1) {
+                               RTE_LOG(ERR, EAL,
+                                       "Cannot init plugin directory %s\n",
+                                       solib->name);
+                               return -1;
+                       }
+               } else {
+                       RTE_LOG(DEBUG, EAL, "open shared lib %s\n",
+                               solib->name);
+                       solib->lib_handle = dlopen(solib->name, RTLD_NOW);
+                       if (solib->lib_handle == NULL) {
+                               RTE_LOG(ERR, EAL, "%s\n", dlerror());
+                               return -1;
+                       }
                }
+
        }
        return 0;
 }
@@ -740,8 +810,7 @@ eal_parse_common_option(int opt, const char *optarg,
        /* force number of channels */
        case 'n':
                conf->force_nchannel = atoi(optarg);
-               if (conf->force_nchannel == 0 ||
-                   conf->force_nchannel > 4) {
+               if (conf->force_nchannel == 0) {
                        RTE_LOG(ERR, EAL, "invalid channel number\n");
                        return -1;
                }
@@ -948,7 +1017,8 @@ eal_common_usage(void)
               "  --"OPT_VDEV"              Add a virtual device.\n"
               "                      The argument format is <driver><id>[,key=val,...]\n"
               "                      (ex: --vdev=eth_pcap0,iface=eth2).\n"
-              "  -d LIB.so           Add driver (can be used multiple times)\n"
+              "  -d LIB.so|DIR       Add a driver or driver directory\n"
+              "                      (can be used multiple times)\n"
               "  --"OPT_VMWARE_TSC_MAP"    Use VMware TSC map instead of native RDTSC\n"
               "  --"OPT_PROC_TYPE"         Type of this process (primary|secondary|auto)\n"
               "  --"OPT_SYSLOG"            Set syslog facility\n"