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Diffstat (limited to 'tools/bpf/bpftool/common.c')
-rw-r--r--tools/bpf/bpftool/common.c195
1 files changed, 164 insertions, 31 deletions
diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
index 2bd3b280e6dd..0b482c0070e0 100644
--- a/tools/bpf/bpftool/common.c
+++ b/tools/bpf/bpftool/common.c
@@ -34,6 +34,7 @@
/* Author: Jakub Kicinski <kubakici@wp.pl> */
#include <errno.h>
+#include <fcntl.h>
#include <fts.h>
#include <libgen.h>
#include <mntent.h>
@@ -44,7 +45,9 @@
#include <unistd.h>
#include <linux/limits.h>
#include <linux/magic.h>
+#include <net/if.h>
#include <sys/mount.h>
+#include <sys/stat.h>
#include <sys/types.h>
#include <sys/vfs.h>
@@ -163,13 +166,49 @@ int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type)
return fd;
}
-int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32))
+int do_pin_fd(int fd, const char *name)
{
char err_str[ERR_MAX_LEN];
- unsigned int id;
- char *endptr;
char *file;
char *dir;
+ int err = 0;
+
+ err = bpf_obj_pin(fd, name);
+ if (!err)
+ goto out;
+
+ file = malloc(strlen(name) + 1);
+ strcpy(file, name);
+ dir = dirname(file);
+
+ if (errno != EPERM || is_bpffs(dir)) {
+ p_err("can't pin the object (%s): %s", name, strerror(errno));
+ goto out_free;
+ }
+
+ /* Attempt to mount bpffs, then retry pinning. */
+ err = mnt_bpffs(dir, err_str, ERR_MAX_LEN);
+ if (!err) {
+ err = bpf_obj_pin(fd, name);
+ if (err)
+ p_err("can't pin the object (%s): %s", name,
+ strerror(errno));
+ } else {
+ err_str[ERR_MAX_LEN - 1] = '\0';
+ p_err("can't mount BPF file system to pin the object (%s): %s",
+ name, err_str);
+ }
+
+out_free:
+ free(file);
+out:
+ return err;
+}
+
+int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32))
+{
+ unsigned int id;
+ char *endptr;
int err;
int fd;
@@ -195,35 +234,8 @@ int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32))
return -1;
}
- err = bpf_obj_pin(fd, *argv);
- if (!err)
- goto out_close;
-
- file = malloc(strlen(*argv) + 1);
- strcpy(file, *argv);
- dir = dirname(file);
-
- if (errno != EPERM || is_bpffs(dir)) {
- p_err("can't pin the object (%s): %s", *argv, strerror(errno));
- goto out_free;
- }
-
- /* Attempt to mount bpffs, then retry pinning. */
- err = mnt_bpffs(dir, err_str, ERR_MAX_LEN);
- if (!err) {
- err = bpf_obj_pin(fd, *argv);
- if (err)
- p_err("can't pin the object (%s): %s", *argv,
- strerror(errno));
- } else {
- err_str[ERR_MAX_LEN - 1] = '\0';
- p_err("can't mount BPF file system to pin the object (%s): %s",
- *argv, err_str);
- }
+ err = do_pin_fd(fd, *argv);
-out_free:
- free(file);
-out_close:
close(fd);
return err;
}
@@ -403,3 +415,124 @@ void delete_pinned_obj_table(struct pinned_obj_table *tab)
free(obj);
}
}
+
+static char *
+ifindex_to_name_ns(__u32 ifindex, __u32 ns_dev, __u32 ns_ino, char *buf)
+{
+ struct stat st;
+ int err;
+
+ err = stat("/proc/self/ns/net", &st);
+ if (err) {
+ p_err("Can't stat /proc/self: %s", strerror(errno));
+ return NULL;
+ }
+
+ if (st.st_dev != ns_dev || st.st_ino != ns_ino)
+ return NULL;
+
+ return if_indextoname(ifindex, buf);
+}
+
+static int read_sysfs_hex_int(char *path)
+{
+ char vendor_id_buf[8];
+ int len;
+ int fd;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ p_err("Can't open %s: %s", path, strerror(errno));
+ return -1;
+ }
+
+ len = read(fd, vendor_id_buf, sizeof(vendor_id_buf));
+ close(fd);
+ if (len < 0) {
+ p_err("Can't read %s: %s", path, strerror(errno));
+ return -1;
+ }
+ if (len >= (int)sizeof(vendor_id_buf)) {
+ p_err("Value in %s too long", path);
+ return -1;
+ }
+
+ vendor_id_buf[len] = 0;
+
+ return strtol(vendor_id_buf, NULL, 0);
+}
+
+static int read_sysfs_netdev_hex_int(char *devname, const char *entry_name)
+{
+ char full_path[64];
+
+ snprintf(full_path, sizeof(full_path), "/sys/class/net/%s/device/%s",
+ devname, entry_name);
+
+ return read_sysfs_hex_int(full_path);
+}
+
+const char *ifindex_to_bfd_name_ns(__u32 ifindex, __u64 ns_dev, __u64 ns_ino)
+{
+ char devname[IF_NAMESIZE];
+ int vendor_id;
+ int device_id;
+
+ if (!ifindex_to_name_ns(ifindex, ns_dev, ns_ino, devname)) {
+ p_err("Can't get net device name for ifindex %d: %s", ifindex,
+ strerror(errno));
+ return NULL;
+ }
+
+ vendor_id = read_sysfs_netdev_hex_int(devname, "vendor");
+ if (vendor_id < 0) {
+ p_err("Can't get device vendor id for %s", devname);
+ return NULL;
+ }
+
+ switch (vendor_id) {
+ case 0x19ee:
+ device_id = read_sysfs_netdev_hex_int(devname, "device");
+ if (device_id != 0x4000 &&
+ device_id != 0x6000 &&
+ device_id != 0x6003)
+ p_info("Unknown NFP device ID, assuming it is NFP-6xxx arch");
+ return "NFP-6xxx";
+ default:
+ p_err("Can't get bfd arch name for device vendor id 0x%04x",
+ vendor_id);
+ return NULL;
+ }
+}
+
+void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode)
+{
+ char name[IF_NAMESIZE];
+
+ if (!ifindex)
+ return;
+
+ printf(" dev ");
+ if (ifindex_to_name_ns(ifindex, ns_dev, ns_inode, name))
+ printf("%s", name);
+ else
+ printf("ifindex %u ns_dev %llu ns_ino %llu",
+ ifindex, ns_dev, ns_inode);
+}
+
+void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode)
+{
+ char name[IF_NAMESIZE];
+
+ if (!ifindex)
+ return;
+
+ jsonw_name(json_wtr, "dev");
+ jsonw_start_object(json_wtr);
+ jsonw_uint_field(json_wtr, "ifindex", ifindex);
+ jsonw_uint_field(json_wtr, "ns_dev", ns_dev);
+ jsonw_uint_field(json_wtr, "ns_inode", ns_inode);
+ if (ifindex_to_name_ns(ifindex, ns_dev, ns_inode, name))
+ jsonw_string_field(json_wtr, "ifname", name);
+ jsonw_end_object(json_wtr);
+}