d7bea6b629
Add a new option `--network-namespace-path` to systemd-nspawn to allow users to specify an arbitrary network namespace, e.g. `/run/netns/foo`. Then systemd-nspawn will open the netns file, pass the fd to outer_child, and enter the namespace represented by the fd before running inner_child. ``` $ sudo ip netns add foo $ mount | grep /run/netns/foo nsfs on /run/netns/foo type nsfs (rw) ... $ sudo systemd-nspawn -D /srv/fc27 --network-namespace-path=/run/netns/foo \ /bin/readlink -f /proc/self/ns/net /proc/1/ns/net:[4026532009] ``` Note that the option `--network-namespace-path=` cannot be used together with other network-related options such as `--private-network` so that the options do not conflict with each other. Fixes https://github.com/systemd/systemd/issues/7361
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010-2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <stddef.h>
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#include <sys/stat.h>
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#include <sys/statfs.h>
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#include <sys/types.h>
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#include <sys/vfs.h>
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#include "macro.h"
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int is_symlink(const char *path);
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int is_dir(const char *path, bool follow);
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int is_device_node(const char *path);
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int dir_is_empty(const char *path);
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static inline int dir_is_populated(const char *path) {
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int r;
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r = dir_is_empty(path);
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if (r < 0)
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return r;
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return !r;
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}
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bool null_or_empty(struct stat *st) _pure_;
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int null_or_empty_path(const char *fn);
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int null_or_empty_fd(int fd);
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int path_is_read_only_fs(const char *path);
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int path_is_os_tree(const char *path);
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int files_same(const char *filea, const char *fileb, int flags);
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/* The .f_type field of struct statfs is really weird defined on
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* different archs. Let's give its type a name. */
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typedef typeof(((struct statfs*)NULL)->f_type) statfs_f_type_t;
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bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) _pure_;
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int fd_is_fs_type(int fd, statfs_f_type_t magic_value);
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int path_is_fs_type(const char *path, statfs_f_type_t magic_value);
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bool is_temporary_fs(const struct statfs *s) _pure_;
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int fd_is_temporary_fs(int fd);
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int fd_is_network_ns(int fd);
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int path_is_temporary_fs(const char *path);
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/* Because statfs.t_type can be int on some architectures, we have to cast
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* the const magic to the type, otherwise the compiler warns about
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* signed/unsigned comparison, because the magic can be 32 bit unsigned.
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*/
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#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
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