NAME
mount_attr - what mount properties to set and clear
LIBRARY
Linux kernel headers
SYNOPSIS
#include <sys/mount.h>
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.