mount_attr - what mount properties to set and clear

NAME LIBRARY SYNOPSIS DESCRIPTION STANDARDS HISTORY SEE ALSO

NAME

mount_attr − what mount properties to set and clear

struct mount_attr {
u64 attr_set; /* Mount properties to set */
u64 attr_clr; /* Mount properties to clear */
u64 propagation; /* Mount propagation type */
u64 userns_fd; /* User namespace file descriptor */
/* ... */
};

DESCRIPTION

Specifies which mount properties should be changed with mount_setattr(2).

The fields are as follows:
.attr_set

This field specifies which MOUNT_ATTR_* attribute flags to set.

.attr_clr

This field specifies which MOUNT_ATTR_* attribute flags to clear.

.propagation

This field specifies what mount propagation will be applied. The valid values of this field are the same propagation types described in mount_namespaces(7).

.userns_fd

This field specifies a file descriptor that indicates which user namespace to use as a reference for ID-mapped mounts with MOUNT_ATTR_IDMAP.

STANDARDS

Linux.

HISTORY

Linux 5.12. glibc 2.36.

Extra fields may be appended to the structure, with a zero value in a new field resulting in the kernel behaving as though that extension field was not present. Therefore, a user must zero-fill this structure on initialization.