Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
49 lines
978 B
C
49 lines
978 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __IDMAP_UTILS_H
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#define __IDMAP_UTILS_H
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <errno.h>
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#include <linux/types.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syscall.h>
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#include <sys/capability.h>
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#include <sys/fsuid.h>
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#include <sys/types.h>
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#include <unistd.h>
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extern int get_userns_fd(unsigned long nsid, unsigned long hostid,
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unsigned long range);
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extern int caps_down(void);
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extern int cap_down(cap_value_t down);
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extern bool switch_ids(uid_t uid, gid_t gid);
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extern int setup_userns(void);
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static inline bool switch_userns(int fd, uid_t uid, gid_t gid, bool drop_caps)
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{
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if (setns(fd, CLONE_NEWUSER))
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return false;
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if (!switch_ids(uid, gid))
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return false;
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if (drop_caps && !caps_down())
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return false;
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return true;
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}
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extern uint64_t get_unique_mnt_id(const char *path);
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#endif /* __IDMAP_UTILS_H */
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