diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index a6617067dbe6457a9d8cae8f60823e10813344ce..02f0244e005c67f5544dc09e2a7a71d67fc916d0 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -481,3 +481,4 @@
549 common faccessat2 sys_faccessat2
550 common process_madvise sys_process_madvise
551 common epoll_pwait2 sys_epoll_pwait2
+552 common mount_setattr sys_mount_setattr
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index 20e1170e2e0aaeb52ea10f1802c637164ea79b5e..dcc1191291a225509693b769ecee3be417403a34 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -455,3 +455,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 86a9d7b3eabe9ee254df4abd7f4fd008176d1cf5..949788f5ba4007049d0e92b55895ef738c1949fa 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -38,7 +38,7 @@
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5)
#define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800)
-#define __NR_compat_syscalls 442
+#define __NR_compat_syscalls 443
#endif
#define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index cccfbbefbf952e2c37d3cb39e046a3877df40638..3d874f624056b15b7e948d4c6821261f3907d4f5 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -891,6 +891,8 @@ __SYSCALL(__NR_faccessat2, sys_faccessat2)
__SYSCALL(__NR_process_madvise, sys_process_madvise)
#define __NR_epoll_pwait2 441
__SYSCALL(__NR_epoll_pwait2, compat_sys_epoll_pwait2)
+#define __NR_mount_setattr 442
+__SYSCALL(__NR_mount_setattr, sys_mount_setattr)
/*
* Please add new compat syscalls above this comment and update
diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
index bfc00f2bd437236823e16abf22f68ca1bc6bebdb..d89231166e19efbdae049f28da2194e34969da58 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -362,3 +362,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 7fe4e45c864c4f36ca7cdd6f410590541f5e6429..72bde6707dd33c311b5f239542279cc554bccb2b 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -441,3 +441,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index a522adf194abe3a3cd982a92888b58365d3858f7..d603a5ec933865b1876267e6e1bf5e57e0044137 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -447,3 +447,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index 0f03ad223f332cfe755c019fada0fbbaf958149c..8fd8c1790941c66048d8f90763dc29f9bdd74571 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -380,3 +380,4 @@
439 n32 faccessat2 sys_faccessat2
440 n32 process_madvise sys_process_madvise
441 n32 epoll_pwait2 compat_sys_epoll_pwait2
+442 n32 mount_setattr sys_mount_setattr
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index 91649690b52f1b25ac229ad4e224366861ab66b9..169f21438065b58d0722445fb1f4afe16ff16a27 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -356,3 +356,4 @@
439 n64 faccessat2 sys_faccessat2
440 n64 process_madvise sys_process_madvise
441 n64 epoll_pwait2 sys_epoll_pwait2
+442 n64 mount_setattr sys_mount_setattr
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 4bad0c40aed6bcfa46294cd0be3d3566137085e0..090d29ca80ff8fefb7ef4f962f69371189c3ae61 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -429,3 +429,4 @@
439 o32 faccessat2 sys_faccessat2
440 o32 process_madvise sys_process_madvise
441 o32 epoll_pwait2 sys_epoll_pwait2 compat_sys_epoll_pwait2
+442 o32 mount_setattr sys_mount_setattr
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 6bcc31966b4460b28a863384f97ea5c97d7b027c..271a9251968345de67e53a2f2f9ad1ba5aa855dd 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -439,3 +439,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2 compat_sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index f744eb5cba887d398e150e9ef9fbb1293d5fe08f..72e5aa67ab8ad1ac9341f221881fdedd2bb8082b 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -531,3 +531,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2 compat_sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index d443423495e565e49a8e57527f00dfdd4ffbea17..3abef2144dac79b69b25852ce28ffb2e5b284afe 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -444,3 +444,4 @@
439 common faccessat2 sys_faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2 compat_sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr sys_mount_setattr
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index 9df40ac0ebc05f584b43dc23777f027cddeff6b3..d08eebad6b7f394cf3bd10a469a179edd14368e3 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -444,3 +444,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 40d8c7cd82984b44ddf9f95074835961114547eb..84403a99039c819c1c43b3600105b5b7cd87a49f 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -487,3 +487,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2 compat_sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 874aeacde2dd157cd1d8f41e34f74598a4ef3f5a..a1c9f496fca6a2bfb44e761b2c5a18199b57d1c7 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -446,3 +446,4 @@
439 i386 faccessat2 sys_faccessat2
440 i386 process_madvise sys_process_madvise
441 i386 epoll_pwait2 sys_epoll_pwait2 compat_sys_epoll_pwait2
+442 i386 mount_setattr sys_mount_setattr
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 78672124d28be0da465300ee9a301bab59c1ac1d..7bf01cbe582f03bc26adb4092bb9023384ec217f 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -363,6 +363,7 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
#
# Due to a historical design error, certain syscalls are numbered differently
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 46116a28eeed3bd0b250ab06874f6238103720a4..365a9b84922482f194962e6744be37a9a82990bd 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -412,3 +412,4 @@
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
+442 common mount_setattr sys_mount_setattr
diff --git a/fs/namespace.c b/fs/namespace.c
index 00ed0d6cb2ee08d41a77bb0137610f3eebe77cbb..726a51c8c46ef7fe3394c4720b4dea1958414844 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -73,6 +73,14 @@ static DECLARE_RWSEM(namespace_sem);
static HLIST_HEAD(unmounted); /* protected by namespace_sem */
static LIST_HEAD(ex_mountpoints); /* protected by namespace_sem */
+struct mount_kattr {
+ unsigned int attr_set;
+ unsigned int attr_clr;
+ unsigned int propagation;
+ unsigned int lookup_flags;
+ bool recurse;
+};
+
/* /sys/fs */
struct kobject *fs_kobj;
EXPORT_SYMBOL_GPL(fs_kobj);
@@ -3469,6 +3477,11 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name,
(MOUNT_ATTR_RDONLY | MOUNT_ATTR_NOSUID | MOUNT_ATTR_NODEV | \
MOUNT_ATTR_NOEXEC | MOUNT_ATTR__ATIME | MOUNT_ATTR_NODIRATIME)
+#define MOUNT_SETATTR_VALID_FLAGS FSMOUNT_VALID_FLAGS
+
+#define MOUNT_SETATTR_PROPAGATION_FLAGS \
+ (MS_UNBINDABLE | MS_PRIVATE | MS_SLAVE | MS_SHARED)
+
static unsigned int attr_flags_to_mnt_flags(u64 attr_flags)
{
unsigned int mnt_flags = 0;
@@ -3820,6 +3833,256 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root,
return error;
}
+static unsigned int recalc_flags(struct mount_kattr *kattr, struct mount *mnt)
+{
+ unsigned int flags = mnt->mnt.mnt_flags;
+
+ /* flags to clear */
+ flags &= ~kattr->attr_clr;
+ /* flags to raise */
+ flags |= kattr->attr_set;
+
+ return flags;
+}
+
+static struct mount *mount_setattr_prepare(struct mount_kattr *kattr,
+ struct mount *mnt, int *err)
+{
+ struct mount *m = mnt, *last = NULL;
+
+ if (!is_mounted(&m->mnt)) {
+ *err = -EINVAL;
+ goto out;
+ }
+
+ if (!(mnt_has_parent(m) ? check_mnt(m) : is_anon_ns(m->mnt_ns))) {
+ *err = -EINVAL;
+ goto out;
+ }
+
+ do {
+ unsigned int flags;
+
+ flags = recalc_flags(kattr, m);
+ if (!can_change_locked_flags(m, flags)) {
+ *err = -EPERM;
+ goto out;
+ }
+
+ last = m;
+
+ if ((kattr->attr_set & MNT_READONLY) &&
+ !(m->mnt.mnt_flags & MNT_READONLY)) {
+ *err = mnt_hold_writers(m);
+ if (*err)
+ goto out;
+ }
+ } while (kattr->recurse && (m = next_mnt(m, mnt)));
+
+out:
+ return last;
+}
+
+static void mount_setattr_commit(struct mount_kattr *kattr,
+ struct mount *mnt, struct mount *last,
+ int err)
+{
+ struct mount *m = mnt;
+
+ do {
+ if (!err) {
+ unsigned int flags;
+
+ flags = recalc_flags(kattr, m);
+ WRITE_ONCE(m->mnt.mnt_flags, flags);
+ }
+
+ /*
+ * We either set MNT_READONLY above so make it visible
+ * before ~MNT_WRITE_HOLD or we failed to recursively
+ * apply mount options.
+ */
+ if ((kattr->attr_set & MNT_READONLY) &&
+ (m->mnt.mnt_flags & MNT_WRITE_HOLD))
+ mnt_unhold_writers(m);
+
+ if (!err && kattr->propagation)
+ change_mnt_propagation(m, kattr->propagation);
+
+ /*
+ * On failure, only cleanup until we found the first mount
+ * we failed to handle.
+ */
+ if (err && m == last)
+ break;
+ } while (kattr->recurse && (m = next_mnt(m, mnt)));
+
+ if (!err)
+ touch_mnt_namespace(mnt->mnt_ns);
+}
+
+static int do_mount_setattr(struct path *path, struct mount_kattr *kattr)
+{
+ struct mount *mnt = real_mount(path->mnt), *last = NULL;
+ int err = 0;
+
+ if (path->dentry != mnt->mnt.mnt_root)
+ return -EINVAL;
+
+ if (kattr->propagation) {
+ /*
+ * Only take namespace_lock() if we're actually changing
+ * propagation.
+ */
+ namespace_lock();
+ if (kattr->propagation == MS_SHARED) {
+ err = invent_group_ids(mnt, kattr->recurse);
+ if (err) {
+ namespace_unlock();
+ return err;
+ }
+ }
+ }
+
+ lock_mount_hash();
+
+ /*
+ * Get the mount tree in a shape where we can change mount
+ * properties without failure.
+ */
+ last = mount_setattr_prepare(kattr, mnt, &err);
+ if (last) /* Commit all changes or revert to the old state. */
+ mount_setattr_commit(kattr, mnt, last, err);
+
+ unlock_mount_hash();
+
+ if (kattr->propagation) {
+ namespace_unlock();
+ if (err)
+ cleanup_group_ids(mnt, NULL);
+ }
+
+ return err;
+}
+
+static int build_mount_kattr(const struct mount_attr *attr,
+ struct mount_kattr *kattr, unsigned int flags)
+{
+ unsigned int lookup_flags = LOOKUP_AUTOMOUNT | LOOKUP_FOLLOW;
+
+ if (flags & AT_NO_AUTOMOUNT)
+ lookup_flags &= ~LOOKUP_AUTOMOUNT;
+ if (flags & AT_SYMLINK_NOFOLLOW)
+ lookup_flags &= ~LOOKUP_FOLLOW;
+ if (flags & AT_EMPTY_PATH)
+ lookup_flags |= LOOKUP_EMPTY;
+
+ *kattr = (struct mount_kattr) {
+ .lookup_flags = lookup_flags,
+ .recurse = !!(flags & AT_RECURSIVE),
+ };
+
+ if (attr->propagation & ~MOUNT_SETATTR_PROPAGATION_FLAGS)
+ return -EINVAL;
+ if (hweight32(attr->propagation & MOUNT_SETATTR_PROPAGATION_FLAGS) > 1)
+ return -EINVAL;
+ kattr->propagation = attr->propagation;
+
+ if ((attr->attr_set | attr->attr_clr) & ~MOUNT_SETATTR_VALID_FLAGS)
+ return -EINVAL;
+
+ if (attr->userns_fd)
+ return -EINVAL;
+
+ kattr->attr_set = attr_flags_to_mnt_flags(attr->attr_set);
+ kattr->attr_clr = attr_flags_to_mnt_flags(attr->attr_clr);
+
+ /*
+ * Since the MOUNT_ATTR_<atime> values are an enum, not a bitmap,
+ * users wanting to transition to a different atime setting cannot
+ * simply specify the atime setting in @attr_set, but must also
+ * specify MOUNT_ATTR__ATIME in the @attr_clr field.
+ * So ensure that MOUNT_ATTR__ATIME can't be partially set in
+ * @attr_clr and that @attr_set can't have any atime bits set if
+ * MOUNT_ATTR__ATIME isn't set in @attr_clr.
+ */
+ if (attr->attr_clr & MOUNT_ATTR__ATIME) {
+ if ((attr->attr_clr & MOUNT_ATTR__ATIME) != MOUNT_ATTR__ATIME)
+ return -EINVAL;
+
+ /*
+ * Clear all previous time settings as they are mutually
+ * exclusive.
+ */
+ kattr->attr_clr |= MNT_RELATIME | MNT_NOATIME;
+ switch (attr->attr_set & MOUNT_ATTR__ATIME) {
+ case MOUNT_ATTR_RELATIME:
+ kattr->attr_set |= MNT_RELATIME;
+ break;
+ case MOUNT_ATTR_NOATIME:
+ kattr->attr_set |= MNT_NOATIME;
+ break;
+ case MOUNT_ATTR_STRICTATIME:
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ if (attr->attr_set & MOUNT_ATTR__ATIME)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path,
+ unsigned int, flags, struct mount_attr __user *, uattr,
+ size_t, usize)
+{
+ int err;
+ struct path target;
+ struct mount_attr attr;
+ struct mount_kattr kattr;
+
+ BUILD_BUG_ON(sizeof(struct mount_attr) != MOUNT_ATTR_SIZE_VER0);
+
+ if (flags & ~(AT_EMPTY_PATH |
+ AT_RECURSIVE |
+ AT_SYMLINK_NOFOLLOW |
+ AT_NO_AUTOMOUNT))
+ return -EINVAL;
+
+ if (unlikely(usize > PAGE_SIZE))
+ return -E2BIG;
+ if (unlikely(usize < MOUNT_ATTR_SIZE_VER0))
+ return -EINVAL;
+
+ if (!may_mount())
+ return -EPERM;
+
+ err = copy_struct_from_user(&attr, sizeof(attr), uattr, usize);
+ if (err)
+ return err;
+
+ /* Don't bother walking through the mounts if this is a nop. */
+ if (attr.attr_set == 0 &&
+ attr.attr_clr == 0 &&
+ attr.propagation == 0)
+ return 0;
+
+ err = build_mount_kattr(&attr, &kattr, flags);
+ if (err)
+ return err;
+
+ err = user_path_at(dfd, path, kattr.lookup_flags, &target);
+ if (err)
+ return err;
+
+ err = do_mount_setattr(&target, &kattr);
+ path_put(&target);
+ return err;
+}
+
static void __init init_mount_tree(void)
{
struct vfsmount *mnt;
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 7688bc983de54a0c8e75ea585f5cea1749523b02..cd7b5c817ba2c3e7baf1b89f66fd70e675837b7b 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -68,6 +68,7 @@ union bpf_attr;
struct io_uring_params;
struct clone_args;
struct open_how;
+struct mount_attr;
#include <linux/types.h>
#include <linux/aio_abi.h>
@@ -1028,6 +1029,9 @@ asmlinkage long sys_open_tree(int dfd, const char __user *path, unsigned flags);
asmlinkage long sys_move_mount(int from_dfd, const char __user *from_path,
int to_dfd, const char __user *to_path,
unsigned int ms_flags);
+asmlinkage long sys_mount_setattr(int dfd, const char __user *path,
+ unsigned int flags,
+ struct mount_attr __user *uattr, size_t usize);
asmlinkage long sys_fsopen(const char __user *fs_name, unsigned int flags);
asmlinkage long sys_fsconfig(int fs_fd, unsigned int cmd, const char __user *key,
const void __user *value, int aux);
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 728752917785efe99cc6a325edbb488a58ff4674..ce58cff99b66530a02e2bc85c7264b236f5b343d 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -861,9 +861,11 @@ __SYSCALL(__NR_faccessat2, sys_faccessat2)
__SYSCALL(__NR_process_madvise, sys_process_madvise)
#define __NR_epoll_pwait2 441
__SC_COMP(__NR_epoll_pwait2, sys_epoll_pwait2, compat_sys_epoll_pwait2)
+#define __NR_mount_setattr 442
+__SYSCALL(__NR_mount_setattr, sys_mount_setattr)
#undef __NR_syscalls
-#define __NR_syscalls 442
+#define __NR_syscalls 443
/*
* 32 bit systems traditionally used different
diff --git a/include/uapi/linux/mount.h b/include/uapi/linux/mount.h
index dd8306ea336c19b695fa9a748c14f5ad92fe3e63..d3bcefdfa73d3868f15b145cd22d5947c4dcdaa6 100644
--- a/include/uapi/linux/mount.h
+++ b/include/uapi/linux/mount.h
@@ -1,6 +1,8 @@
#ifndef _UAPI_LINUX_MOUNT_H
#define _UAPI_LINUX_MOUNT_H
+#include <linux/types.h>
+
/*
* These are the fs-independent mount-flags: up to 32 flags are supported
*
@@ -118,4 +120,17 @@ enum fsconfig_command {
#define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
#define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */
+/*
+ * mount_setattr()
+ */
+struct mount_attr {
+ __u64 attr_set;
+ __u64 attr_clr;
+ __u64 propagation;
+ __u64 userns_fd;
+};
+
+/* List of all mount_attr versions. */
+#define MOUNT_ATTR_SIZE_VER0 32 /* sizeof first published struct */
+
#endif /* _UAPI_LINUX_MOUNT_H */
diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h
index 728752917785efe99cc6a325edbb488a58ff4674..ce58cff99b66530a02e2bc85c7264b236f5b343d 100644
--- a/tools/include/uapi/asm-generic/unistd.h
+++ b/tools/include/uapi/asm-generic/unistd.h
@@ -861,9 +861,11 @@ __SYSCALL(__NR_faccessat2, sys_faccessat2)
__SYSCALL(__NR_process_madvise, sys_process_madvise)
#define __NR_epoll_pwait2 441
__SC_COMP(__NR_epoll_pwait2, sys_epoll_pwait2, compat_sys_epoll_pwait2)
+#define __NR_mount_setattr 442
+__SYSCALL(__NR_mount_setattr, sys_mount_setattr)
#undef __NR_syscalls
-#define __NR_syscalls 442
+#define __NR_syscalls 443
/*
* 32 bit systems traditionally used different