d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

eal: support driver loading from directory

Browse Source 
Add support for directories as arguments to -d for loading all drivers
from a given directory. Additionally a default driver directory can be
set in build-time configuration, in which case it will be always be used
when EAL is initialized.

This simplifies usage in shared library configuration significantly over
manually loading individual drivers with -d, and allows distros to
establish a drop-in driver directory for seamless integration
with 3rd party drivers etc.

Suggested-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Suggested-by: David Marchand <david.marchand@6wind.com>
Signed-off-by: Panu Matilainen <pmatilai@redhat.com>
Acked-by: David Marchand <david.marchand@6wind.com>
This commit is contained in:
Panu Matilainen 2015-11-10 16:28:15 +02:00 committed by Thomas Monjalon
parent fa9cdc6f84
commit 9f8eb1d9ca
3 changed files with 75 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
config/common_bsdapp
View File

@ -108,6 +108,9 @@ CONFIG_RTE_EAL_ALLOW_INV_SOCKET_ID=n
CONFIG_RTE_EAL_ALWAYS_PANIC_ON_ERROR=n
CONFIG_RTE_MALLOC_DEBUG=n
# Default driver path (or "" to disable)
CONFIG_RTE_EAL_PMD_PATH=""
#
# FreeBSD contiguous memory driver settings
#

3
config/common_linuxapp
View File

@ -111,6 +111,9 @@ CONFIG_RTE_EAL_IGB_UIO=y
CONFIG_RTE_EAL_VFIO=y
CONFIG_RTE_MALLOC_DEBUG=n
# Default driver path (or "" to disable)
CONFIG_RTE_EAL_PMD_PATH=""
#
# Special configurations in PCI Config Space for high performance
#

68
lib/librte_eal/common/eal_common_options.c
View File

@ -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 +112,9 @@ 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;
static int master_lcore_parsed;
static int mem_parsed;
@ -167,18 +173,75 @@ 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) {
if (dent->d_type != DT_REG && dent->d_type != DT_LNK)
continue;
snprintf(sopath, PATH_MAX-1, "%s/%s", path, dent->d_name);
sopath[PATH_MAX-1] = 0;
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);
struct stat sb;
if (stat(solib->name, &sb) == -1) {
RTE_LOG(ERR, EAL, "Invalid plugin specified: %s: %s\n",
solib->name, strerror(errno));
return -1;
}
switch (sb.st_mode & S_IFMT) {
case S_IFDIR:
if (eal_plugindir_init(solib->name) == -1) {
RTE_LOG(ERR, EAL,
"Cannot init plugin directory %s\n",
solib->name);
return -1;
}
break;
case S_IFREG:
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;
}
break;
}
}
return 0;
}
@ -948,7 +1011,8 @@ 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"