diff options
Diffstat (limited to 'tools/bpf/bpftool/common.c')
| -rw-r--r-- | tools/bpf/bpftool/common.c | 69 |
1 files changed, 30 insertions, 39 deletions
diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c index 172d3761d9ab..897483457bf0 100644 --- a/tools/bpf/bpftool/common.c +++ b/tools/bpf/bpftool/common.c @@ -1,35 +1,5 @@ -/* - * Copyright (C) 2017-2018 Netronome Systems, Inc. - * - * This software is dual licensed under the GNU General License Version 2, - * June 1991 as shown in the file COPYING in the top-level directory of this - * source tree or the BSD 2-Clause License provided below. You have the - * option to license this software under the complete terms of either license. - * - * The BSD 2-Clause License: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * 1. Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * 2. Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* Copyright (C) 2017-2018 Netronome Systems, Inc. */ #include <ctype.h> #include <errno.h> @@ -58,7 +28,7 @@ #define BPF_FS_MAGIC 0xcafe4a11 #endif -void p_err(const char *fmt, ...) +void __printf(1, 2) p_err(const char *fmt, ...) { va_list ap; @@ -76,7 +46,7 @@ void p_err(const char *fmt, ...) va_end(ap); } -void p_info(const char *fmt, ...) +void __printf(1, 2) p_info(const char *fmt, ...) { va_list ap; @@ -106,7 +76,8 @@ void set_max_rlimit(void) setrlimit(RLIMIT_MEMLOCK, &rinf); } -static int mnt_bpffs(const char *target, char *buff, size_t bufflen) +static int +mnt_fs(const char *target, const char *type, char *buff, size_t bufflen) { bool bind_done = false; @@ -128,15 +99,29 @@ static int mnt_bpffs(const char *target, char *buff, size_t bufflen) bind_done = true; } - if (mount("bpf", target, "bpf", 0, "mode=0700")) { - snprintf(buff, bufflen, "mount -t bpf bpf %s failed: %s", - target, strerror(errno)); + if (mount(type, target, type, 0, "mode=0700")) { + snprintf(buff, bufflen, "mount -t %s %s %s failed: %s", + type, type, target, strerror(errno)); return -1; } return 0; } +int mount_tracefs(const char *target) +{ + char err_str[ERR_MAX_LEN]; + int err; + + err = mnt_fs(target, "tracefs", err_str, ERR_MAX_LEN); + if (err) { + err_str[ERR_MAX_LEN - 1] = '\0'; + p_err("can't mount tracefs: %s", err_str); + } + + return err; +} + int open_obj_pinned(char *path, bool quiet) { int fd; @@ -192,7 +177,13 @@ int mount_bpffs_for_pin(const char *name) /* nothing to do if already mounted */ goto out_free; - err = mnt_bpffs(dir, err_str, ERR_MAX_LEN); + if (block_mount) { + p_err("no BPF file system found, not mounting it due to --nomount option"); + err = -1; + goto out_free; + } + + err = mnt_fs(dir, "bpf", err_str, ERR_MAX_LEN); if (err) { err_str[ERR_MAX_LEN - 1] = '\0'; p_err("can't mount BPF file system to pin the object (%s): %s", |