Request a read file descriptor for: - map subcommands: show_subset, show, dump, lookup, getnext and pin; - btf subcommand: dump; - prog subcommand: show (metadata); - struct_ops subcommands: show and dump; - do_build_table_cb(), to show the path of a pinned map.
Signed-off-by: Roberto Sassu roberto.sassu@huawei.com --- tools/bpf/bpftool/btf.c | 5 +++-- tools/bpf/bpftool/common.c | 5 +++-- tools/bpf/bpftool/map.c | 10 +++++----- tools/bpf/bpftool/prog.c | 2 +- tools/bpf/bpftool/struct_ops.c | 4 ++-- 5 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c index 69a7695030f9..a36710903549 100644 --- a/tools/bpf/bpftool/btf.c +++ b/tools/bpf/bpftool/btf.c @@ -529,7 +529,8 @@ static int do_dump(int argc, char **argv) return -1; }
- fd = map_parse_fd_and_info(&argc, &argv, &info, &len, 0); + fd = map_parse_fd_and_info(&argc, &argv, &info, &len, + BPF_F_RDONLY); if (fd < 0) return -1;
@@ -730,7 +731,7 @@ build_btf_type_table(struct hashmap *tab, enum bpf_obj_type type, fd = bpf_prog_get_fd_by_id(id); break; case BPF_OBJ_MAP: - fd = bpf_map_get_fd_by_id(id); + fd = bpf_map_get_fd_by_id_flags(id, BPF_F_RDONLY); break; default: err = -1; diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c index 0816ea2f0be1..d20e1fa8a5fd 100644 --- a/tools/bpf/bpftool/common.c +++ b/tools/bpf/bpftool/common.c @@ -228,7 +228,7 @@ int do_pin_any(int argc, char **argv, int (*get_fd)(int *, char ***, __u32)) int err; int fd;
- fd = get_fd(&argc, &argv, 0); + fd = get_fd(&argc, &argv, BPF_F_RDONLY); if (fd < 0) return fd;
@@ -401,7 +401,8 @@ static int do_build_table_cb(const char *fpath, const struct stat *sb, if (typeflag != FTW_F) goto out_ret;
- fd = open_obj_pinned(fpath, true, 0); + /* WARNING: setting flags to BPF_F_RDONLY has effect only for maps. */ + fd = open_obj_pinned(fpath, true, BPF_F_RDONLY); if (fd < 0) goto out_ret;
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index f253f69879a9..e4346c834e07 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -634,7 +634,7 @@ static int do_show_subset(int argc, char **argv) p_err("mem alloc failed"); return -1; } - nb_fds = map_parse_fds(&argc, &argv, &fds, 0); + nb_fds = map_parse_fds(&argc, &argv, &fds, BPF_F_RDONLY); if (nb_fds < 1) goto exit_free;
@@ -702,7 +702,7 @@ static int do_show(int argc, char **argv) break; }
- fd = bpf_map_get_fd_by_id(id); + fd = bpf_map_get_fd_by_id_flags(id, BPF_F_RDONLY); if (fd < 0) { if (errno == ENOENT) continue; @@ -910,7 +910,7 @@ static int do_dump(int argc, char **argv) p_err("mem alloc failed"); return -1; } - nb_fds = map_parse_fds(&argc, &argv, &fds, 0); + nb_fds = map_parse_fds(&argc, &argv, &fds, BPF_F_RDONLY); if (nb_fds < 1) goto exit_free;
@@ -1077,7 +1077,7 @@ static int do_lookup(int argc, char **argv) if (argc < 2) usage();
- fd = map_parse_fd_and_info(&argc, &argv, &info, &len, 0); + fd = map_parse_fd_and_info(&argc, &argv, &info, &len, BPF_F_RDONLY); if (fd < 0) return -1;
@@ -1128,7 +1128,7 @@ static int do_getnext(int argc, char **argv) if (argc < 2) usage();
- fd = map_parse_fd_and_info(&argc, &argv, &info, &len, 0); + fd = map_parse_fd_and_info(&argc, &argv, &info, &len, BPF_F_RDONLY); if (fd < 0) return -1;
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index 05480bf26a00..58d573badcb4 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -251,7 +251,7 @@ static void *find_metadata(int prog_fd, struct bpf_map_info *map_info) goto free_map_ids;
for (i = 0; i < prog_info.nr_map_ids; i++) { - map_fd = bpf_map_get_fd_by_id(map_ids[i]); + map_fd = bpf_map_get_fd_by_id_flags(map_ids[i], BPF_F_RDONLY); if (map_fd < 0) goto free_map_ids;
diff --git a/tools/bpf/bpftool/struct_ops.c b/tools/bpf/bpftool/struct_ops.c index e8252a76e115..ced5fe62b1d7 100644 --- a/tools/bpf/bpftool/struct_ops.c +++ b/tools/bpf/bpftool/struct_ops.c @@ -359,7 +359,7 @@ static int do_show(int argc, char **argv) }
res = do_work_on_struct_ops(search_type, search_term, __do_show, - NULL, json_wtr, 0); + NULL, json_wtr, BPF_F_RDONLY);
return cmd_retval(&res, !!search_term); } @@ -448,7 +448,7 @@ static int do_dump(int argc, char **argv) d.prog_id_as_func_ptr = true;
res = do_work_on_struct_ops(search_type, search_term, __do_dump, &d, - wtr, 0); + wtr, BPF_F_RDONLY);
if (!json_output) jsonw_destroy(&wtr);