mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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7f4f229195
Apart from the network and mount namespace all other namespaces expose a stable inode number and userspace has been relying on that for a very long time now. It's very much heavily used API. Align the mount namespace and use a stable inode number from the reserved procfs inode number space so this is consistent across all namespaces. Link: https://lore.kernel.org/20250606-work-nsfs-v1-3-b8749c9a8844@kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org>
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __LINUX_NSFS_H
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#define __LINUX_NSFS_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#define NSIO 0xb7
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/* Returns a file descriptor that refers to an owning user namespace */
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#define NS_GET_USERNS _IO(NSIO, 0x1)
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/* Returns a file descriptor that refers to a parent namespace */
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#define NS_GET_PARENT _IO(NSIO, 0x2)
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/* Returns the type of namespace (CLONE_NEW* value) referred to by
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file descriptor */
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#define NS_GET_NSTYPE _IO(NSIO, 0x3)
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/* Get owner UID (in the caller's user namespace) for a user namespace */
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#define NS_GET_OWNER_UID _IO(NSIO, 0x4)
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/* Get the id for a mount namespace */
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#define NS_GET_MNTNS_ID _IOR(NSIO, 0x5, __u64)
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/* Translate pid from target pid namespace into the caller's pid namespace. */
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#define NS_GET_PID_FROM_PIDNS _IOR(NSIO, 0x6, int)
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/* Return thread-group leader id of pid in the callers pid namespace. */
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#define NS_GET_TGID_FROM_PIDNS _IOR(NSIO, 0x7, int)
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/* Translate pid from caller's pid namespace into a target pid namespace. */
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#define NS_GET_PID_IN_PIDNS _IOR(NSIO, 0x8, int)
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/* Return thread-group leader id of pid in the target pid namespace. */
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#define NS_GET_TGID_IN_PIDNS _IOR(NSIO, 0x9, int)
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struct mnt_ns_info {
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__u32 size;
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__u32 nr_mounts;
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__u64 mnt_ns_id;
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};
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#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
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/* Get information about namespace. */
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#define NS_MNT_GET_INFO _IOR(NSIO, 10, struct mnt_ns_info)
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/* Get next namespace. */
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#define NS_MNT_GET_NEXT _IOR(NSIO, 11, struct mnt_ns_info)
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/* Get previous namespace. */
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#define NS_MNT_GET_PREV _IOR(NSIO, 12, struct mnt_ns_info)
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enum init_ns_ino {
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IPC_NS_INIT_INO = 0xEFFFFFFFU,
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UTS_NS_INIT_INO = 0xEFFFFFFEU,
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USER_NS_INIT_INO = 0xEFFFFFFDU,
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PID_NS_INIT_INO = 0xEFFFFFFCU,
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CGROUP_NS_INIT_INO = 0xEFFFFFFBU,
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TIME_NS_INIT_INO = 0xEFFFFFFAU,
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NET_NS_INIT_INO = 0xEFFFFFF9U,
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MNT_NS_INIT_INO = 0xEFFFFFF8U,
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};
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#endif /* __LINUX_NSFS_H */
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