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Message-ID: <20260529171103.12343-3-luis@igalia.com>
Date: Fri, 29 May 2026 18:10:59 +0100
From: Luis Henriques <luis@...lia.com>
To: musl@...ts.openwall.com
Cc: Luis Henriques <luis@...lia.com>
Subject: [RFC PATCH 2/6] add move_mount() linux syscall wrapper
The move_mount() syscall is part of the "new" mount API which was merged into
the linux kernel 5.2.
Signed-off-by: Luis Henriques <luis@...lia.com>
---
include/sys/mount.h | 10 ++++++++++
src/linux/mount.c | 5 +++++
2 files changed, 15 insertions(+)
diff --git a/include/sys/mount.h b/include/sys/mount.h
index c77a81c1b552..ec7027a3c967 100644
--- a/include/sys/mount.h
+++ b/include/sys/mount.h
@@ -67,11 +67,21 @@ extern "C" {
#define OPEN_TREE_CLONE 1
#define OPEN_TREE_CLOEXEC O_CLOEXEC
+#define MOVE_MOUNT_F_SYMLINKS 0x00000001
+#define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002
+#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004
+#define MOVE_MOUNT_T_SYMLINKS 0x00000010
+#define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020
+#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040
+#define MOVE_MOUNT_SET_GROUP 0x00000100
+#define MOVE_MOUNT_BENEATH 0x00000200
+
int mount(const char *, const char *, const char *, unsigned long, const void *);
int umount(const char *);
int umount2(const char *, int);
int open_tree(int, const char *, unsigned int);
+int move_mount(int, const char *, int, const char *, unsigned int);
#ifdef __cplusplus
}
diff --git a/src/linux/mount.c b/src/linux/mount.c
index 080ec9e1222b..b91d9e8c8d22 100644
--- a/src/linux/mount.c
+++ b/src/linux/mount.c
@@ -20,3 +20,8 @@ int open_tree(int dirfd, const char *path, unsigned int flags)
{
return syscall(SYS_open_tree, dirfd, path, flags);
}
+
+int move_mount(int from_dirfd, const char *from_path, int to_dirfd, const char *to_path, unsigned int flags)
+{
+ return syscall(SYS_move_mount, from_dirfd, from_path, to_dirfd, to_path, flags);
+}
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