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Man Pages
VFS_MOUNT(9) FreeBSD Kernel Developer's Manual VFS_MOUNT(9)

VFS_MOUNT
mount a file system

#include <sys/param.h>
#include <sys/mount.h>
#include <sys/vnode.h>
int
VFS_MOUNT(struct mount *mp);

The VFS_MOUNT() macro mounts a file system into the system's namespace or updates the attributes of an already mounted file system.
The arguments it expects are:
mp
Structure representing the file system.
The VFS_MOUNT() macro is called both to mount new file systems and to change the attributes of an existing file system. If the MNT_UPDATE flag is set in mp->mnt_flag then the file system should update its internal state from the value of mp->mnt_flag. This can be used, for instance, to convert a read-only file system to read-write. It is also used by mountd(8) to update the NFS export information for the file system.
If the MNT_UPDATE flag is not specified, then this is a newly mounted file system. The file system code should allocate and initialize any private data needed to represent the file system (it can use the mp->mnt_data field to store this information).

VFS(9), vnode(9)

This manual page was written by Doug Rabson.
May 23, 2009 FreeBSD 12.0-RELEASE

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