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-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-map.rst5
-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-prog.rst5
-rw-r--r--tools/bpf/bpftool/common.c97
-rw-r--r--tools/bpf/bpftool/main.c18
-rw-r--r--tools/bpf/bpftool/main.h21
-rw-r--r--tools/bpf/bpftool/map.c22
-rw-r--r--tools/bpf/bpftool/prog.c25
7 files changed, 187 insertions, 6 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst
index abb9ee940b15..9f51a268eb06 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-map.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst
@@ -12,7 +12,7 @@ SYNOPSIS
**bpftool** [*OPTIONS*] **map** *COMMAND*
- *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] }
+ *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
*COMMANDS* :=
{ **show** | **dump** | **update** | **lookup** | **getnext** | **delete**
@@ -86,6 +86,9 @@ OPTIONS
-p, --pretty
Generate human-readable JSON output. Implies **-j**.
+ -f, --bpffs
+ Show file names of pinned maps.
+
EXAMPLES
========
**# bpftool map show**
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index 0f25d3c39e05..36e8d1c3c40d 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -12,7 +12,7 @@ SYNOPSIS
**bpftool** [*OPTIONS*] **prog** *COMMAND*
- *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] }
+ *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
*COMMANDS* :=
{ **show** | **dump xlated** | **dump jited** | **pin** | **help** }
@@ -75,6 +75,9 @@ OPTIONS
-p, --pretty
Generate human-readable JSON output. Implies **-j**.
+ -f, --bpffs
+ Show file names of pinned programs.
+
EXAMPLES
========
**# bpftool prog show**
diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
index aa7017098b2a..2bd3b280e6dd 100644
--- a/tools/bpf/bpftool/common.c
+++ b/tools/bpf/bpftool/common.c
@@ -34,7 +34,9 @@
/* Author: Jakub Kicinski <kubakici@wp.pl> */
#include <errno.h>
+#include <fts.h>
#include <libgen.h>
+#include <mntent.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
@@ -122,9 +124,8 @@ static int mnt_bpffs(const char *target, char *buff, size_t bufflen)
return 0;
}
-int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type)
+int open_obj_pinned(char *path)
{
- enum bpf_obj_type type;
int fd;
fd = bpf_obj_get(path);
@@ -136,6 +137,18 @@ int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type)
return -1;
}
+ return fd;
+}
+
+int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type)
+{
+ enum bpf_obj_type type;
+ int fd;
+
+ fd = open_obj_pinned(path);
+ if (fd < 0)
+ return -1;
+
type = get_fd_type(fd);
if (type < 0) {
close(fd);
@@ -310,3 +323,83 @@ void print_hex_data_json(uint8_t *data, size_t len)
jsonw_printf(json_wtr, "\"0x%02hhx\"", data[i]);
jsonw_end_array(json_wtr);
}
+
+int build_pinned_obj_table(struct pinned_obj_table *tab,
+ enum bpf_obj_type type)
+{
+ struct bpf_prog_info pinned_info = {};
+ struct pinned_obj *obj_node = NULL;
+ __u32 len = sizeof(pinned_info);
+ struct mntent *mntent = NULL;
+ enum bpf_obj_type objtype;
+ FILE *mntfile = NULL;
+ FTSENT *ftse = NULL;
+ FTS *fts = NULL;
+ int fd, err;
+
+ mntfile = setmntent("/proc/mounts", "r");
+ if (!mntfile)
+ return -1;
+
+ while ((mntent = getmntent(mntfile))) {
+ char *path[] = { mntent->mnt_dir, NULL };
+
+ if (strncmp(mntent->mnt_type, "bpf", 3) != 0)
+ continue;
+
+ fts = fts_open(path, 0, NULL);
+ if (!fts)
+ continue;
+
+ while ((ftse = fts_read(fts))) {
+ if (!(ftse->fts_info & FTS_F))
+ continue;
+ fd = open_obj_pinned(ftse->fts_path);
+ if (fd < 0)
+ continue;
+
+ objtype = get_fd_type(fd);
+ if (objtype != type) {
+ close(fd);
+ continue;
+ }
+ memset(&pinned_info, 0, sizeof(pinned_info));
+ err = bpf_obj_get_info_by_fd(fd, &pinned_info, &len);
+ if (err) {
+ close(fd);
+ continue;
+ }
+
+ obj_node = malloc(sizeof(*obj_node));
+ if (!obj_node) {
+ close(fd);
+ fts_close(fts);
+ fclose(mntfile);
+ return -1;
+ }
+
+ memset(obj_node, 0, sizeof(*obj_node));
+ obj_node->id = pinned_info.id;
+ obj_node->path = strdup(ftse->fts_path);
+ hash_add(tab->table, &obj_node->hash, obj_node->id);
+
+ close(fd);
+ }
+ fts_close(fts);
+ }
+ fclose(mntfile);
+ return 0;
+}
+
+void delete_pinned_obj_table(struct pinned_obj_table *tab)
+{
+ struct pinned_obj *obj;
+ struct hlist_node *tmp;
+ unsigned int bkt;
+
+ hash_for_each_safe(tab->table, bkt, tmp, obj, hash) {
+ hash_del(&obj->hash);
+ free(obj->path);
+ free(obj);
+ }
+}
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 78d9afb74ef4..d6e4762170a4 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -54,6 +54,9 @@ static int (*last_do_help)(int argc, char **argv);
json_writer_t *json_wtr;
bool pretty_output;
bool json_output;
+bool show_pinned;
+struct pinned_obj_table prog_table;
+struct pinned_obj_table map_table;
void usage(void)
{
@@ -263,6 +266,7 @@ int main(int argc, char **argv)
{ "help", no_argument, NULL, 'h' },
{ "pretty", no_argument, NULL, 'p' },
{ "version", no_argument, NULL, 'V' },
+ { "bpffs", no_argument, NULL, 'f' },
{ 0 }
};
int opt, ret;
@@ -270,9 +274,13 @@ int main(int argc, char **argv)
last_do_help = do_help;
pretty_output = false;
json_output = false;
+ show_pinned = false;
bin_name = argv[0];
- while ((opt = getopt_long(argc, argv, "Vhpj",
+ hash_init(prog_table.table);
+ hash_init(map_table.table);
+
+ while ((opt = getopt_long(argc, argv, "Vhpjf",
options, NULL)) >= 0) {
switch (opt) {
case 'V':
@@ -285,6 +293,9 @@ int main(int argc, char **argv)
case 'j':
json_output = true;
break;
+ case 'f':
+ show_pinned = true;
+ break;
default:
usage();
}
@@ -311,5 +322,10 @@ int main(int argc, char **argv)
if (json_output)
jsonw_destroy(&json_wtr);
+ if (show_pinned) {
+ delete_pinned_obj_table(&prog_table);
+ delete_pinned_obj_table(&map_table);
+ }
+
return ret;
}
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h
index ff5ad05b137b..9c191e222d6f 100644
--- a/tools/bpf/bpftool/main.h
+++ b/tools/bpf/bpftool/main.h
@@ -42,6 +42,7 @@
#include <stdio.h>
#include <linux/bpf.h>
#include <linux/kernel.h>
+#include <linux/hashtable.h>
#include "json_writer.h"
@@ -58,7 +59,7 @@
#define HELP_SPEC_PROGRAM \
"PROG := { id PROG_ID | pinned FILE | tag PROG_TAG }"
#define HELP_SPEC_OPTIONS \
- "OPTIONS := { {-j|--json} [{-p|--pretty}] }"
+ "OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} }"
enum bpf_obj_type {
BPF_OBJ_UNKNOWN,
@@ -70,6 +71,9 @@ extern const char *bin_name;
extern json_writer_t *json_wtr;
extern bool json_output;
+extern bool show_pinned;
+extern struct pinned_obj_table prog_table;
+extern struct pinned_obj_table map_table;
void p_err(const char *fmt, ...);
void p_info(const char *fmt, ...);
@@ -78,6 +82,20 @@ bool is_prefix(const char *pfx, const char *str);
void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
void usage(void) __attribute__((noreturn));
+struct pinned_obj_table {
+ DECLARE_HASHTABLE(table, 16);
+};
+
+struct pinned_obj {
+ __u32 id;
+ char *path;
+ struct hlist_node hash;
+};
+
+int build_pinned_obj_table(struct pinned_obj_table *table,
+ enum bpf_obj_type type);
+void delete_pinned_obj_table(struct pinned_obj_table *tab);
+
struct cmd {
const char *cmd;
int (*func)(int argc, char **argv);
@@ -89,6 +107,7 @@ int cmd_select(const struct cmd *cmds, int argc, char **argv,
int get_fd_type(int fd);
const char *get_fd_type_name(enum bpf_obj_type type);
char *get_fdinfo(int fd, const char *key);
+int open_obj_pinned(char *path);
int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type);
int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32));
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index e978ab23a77f..e2450c8e88e6 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -436,6 +436,18 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
free(memlock);
+ if (!hash_empty(map_table.table)) {
+ struct pinned_obj *obj;
+
+ jsonw_name(json_wtr, "pinned");
+ jsonw_start_array(json_wtr);
+ hash_for_each_possible(map_table.table, obj, hash, info->id) {
+ if (obj->id == info->id)
+ jsonw_string(json_wtr, obj->path);
+ }
+ jsonw_end_array(json_wtr);
+ }
+
jsonw_end_object(json_wtr);
return 0;
@@ -466,7 +478,14 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
free(memlock);
printf("\n");
+ if (!hash_empty(map_table.table)) {
+ struct pinned_obj *obj;
+ hash_for_each_possible(map_table.table, obj, hash, info->id) {
+ if (obj->id == info->id)
+ printf("\tpinned %s\n", obj->path);
+ }
+ }
return 0;
}
@@ -478,6 +497,9 @@ static int do_show(int argc, char **argv)
int err;
int fd;
+ if (show_pinned)
+ build_pinned_obj_table(&map_table, BPF_OBJ_MAP);
+
if (argc == 2) {
fd = map_parse_fd_and_info(&argc, &argv, &info, &len);
if (fd < 0)
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index d3ab808dc882..f45c44ef9bec 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -272,6 +272,18 @@ static void print_prog_json(struct bpf_prog_info *info, int fd)
if (info->nr_map_ids)
show_prog_maps(fd, info->nr_map_ids);
+ if (!hash_empty(prog_table.table)) {
+ struct pinned_obj *obj;
+
+ jsonw_name(json_wtr, "pinned");
+ jsonw_start_array(json_wtr);
+ hash_for_each_possible(prog_table.table, obj, hash, info->id) {
+ if (obj->id == info->id)
+ jsonw_string(json_wtr, obj->path);
+ }
+ jsonw_end_array(json_wtr);
+ }
+
jsonw_end_object(json_wtr);
}
@@ -331,6 +343,16 @@ static void print_prog_plain(struct bpf_prog_info *info, int fd)
if (info->nr_map_ids)
show_prog_maps(fd, info->nr_map_ids);
+ if (!hash_empty(prog_table.table)) {
+ struct pinned_obj *obj;
+
+ printf("\n");
+ hash_for_each_possible(prog_table.table, obj, hash, info->id) {
+ if (obj->id == info->id)
+ printf("\tpinned %s\n", obj->path);
+ }
+ }
+
printf("\n");
}
@@ -360,6 +382,9 @@ static int do_show(int argc, char **argv)
int err;
int fd;
+ if (show_pinned)
+ build_pinned_obj_table(&prog_table, BPF_OBJ_PROG);
+
if (argc == 2) {
fd = prog_parse_fd(&argc, &argv);
if (fd < 0)
generated by cgit v1.2.3-70-g09d2 (git 2.51.1) at 2025-11-04 07:01:02 +0000