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Add tests for STATMOUNT_BY_FD flag, which adds support for passing a file descriptors to statmount(). The fd can also be on a "unmounted" mount (mount unmounted with MNT_DETACH), we also include tests for that. Co-developed-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Bhavik Sachdev <b.sachdev1904@gmail.com> Link: https://patch.msgid.link/20251129091455.757724-4-b.sachdev1904@gmail.com Signed-off-by: Christian Brauner <brauner@kernel.org>
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __STATMOUNT_H
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#define __STATMOUNT_H
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#include <stdint.h>
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#include <linux/mount.h>
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#include <asm/unistd.h>
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#ifndef __NR_statmount
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#if defined __alpha__
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#define __NR_statmount 567
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#elif defined _MIPS_SIM
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#if _MIPS_SIM == _MIPS_SIM_ABI32 /* o32 */
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#define __NR_statmount 4457
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#endif
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#if _MIPS_SIM == _MIPS_SIM_NABI32 /* n32 */
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#define __NR_statmount 6457
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#endif
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#if _MIPS_SIM == _MIPS_SIM_ABI64 /* n64 */
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#define __NR_statmount 5457
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#endif
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#else
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#define __NR_statmount 457
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#endif
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#endif
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#ifndef __NR_listmount
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#if defined __alpha__
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#define __NR_listmount 568
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#elif defined _MIPS_SIM
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#if _MIPS_SIM == _MIPS_SIM_ABI32 /* o32 */
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#define __NR_listmount 4458
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#endif
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#if _MIPS_SIM == _MIPS_SIM_NABI32 /* n32 */
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#define __NR_listmount 6458
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#endif
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#if _MIPS_SIM == _MIPS_SIM_ABI64 /* n64 */
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#define __NR_listmount 5458
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#endif
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#else
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#define __NR_listmount 458
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#endif
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#endif
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static inline int statmount(uint64_t mnt_id, uint64_t mnt_ns_id, uint32_t fd,
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uint64_t mask, struct statmount *buf, size_t bufsize,
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unsigned int flags)
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{
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struct mnt_id_req req = {
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.size = MNT_ID_REQ_SIZE_VER0,
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.param = mask,
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};
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if (flags & STATMOUNT_BY_FD) {
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req.size = MNT_ID_REQ_SIZE_VER1;
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req.mnt_fd = fd;
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} else {
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req.mnt_id = mnt_id;
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if (mnt_ns_id) {
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req.size = MNT_ID_REQ_SIZE_VER1;
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req.mnt_ns_id = mnt_ns_id;
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}
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}
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return syscall(__NR_statmount, &req, buf, bufsize, flags);
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}
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static inline ssize_t listmount(uint64_t mnt_id, uint64_t mnt_ns_id,
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uint64_t last_mnt_id, uint64_t list[], size_t num,
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unsigned int flags)
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{
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struct mnt_id_req req = {
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.size = MNT_ID_REQ_SIZE_VER0,
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.mnt_id = mnt_id,
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.param = last_mnt_id,
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};
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if (mnt_ns_id) {
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req.size = MNT_ID_REQ_SIZE_VER1;
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req.mnt_ns_id = mnt_ns_id;
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}
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return syscall(__NR_listmount, &req, list, num, flags);
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}
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#endif /* __STATMOUNT_H */
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