vfs_mount(9) [freebsd man page]

VFS_MOUNT(9)						   BSD Kernel Developer's Manual					      VFS_MOUNT(9)

NAME

     VFS_MOUNT -- mount a file system

SYNOPSIS

     #include <sys/param.h>
     #include <sys/mount.h>
     #include <sys/vnode.h>

     int
     VFS_MOUNT(struct mount *mp);

DESCRIPTION

     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).

SEE ALSO

     VFS(9), vnode(9)

AUTHORS

     This manual page was written by Doug Rabson.

BSD
								   May 23, 2009 							       BSD

VFS_FHTOVP(9)						   BSD Kernel Developer's Manual					     VFS_FHTOVP(9)

NAME

     VFS_FHTOVP -- turn an NFS filehandle into a vnode

SYNOPSIS

     #include <sys/param.h>
     #include <sys/mount.h>
     #include <sys/vnode.h>

     int
     VFS_FHTOVP(struct mount *mp, struct fid *fhp, struct vnode **vpp);

DESCRIPTION

     The VFS_FHTOVP() macro is used by the NFS server to turn an NFS filehandle into a vnode.

     The arguments it expects are:

     mp   The file system.

     fhp  The filehandle to convert.

     vpp  Return parameter for the new locked vnode.

     The contents of the filehandle are defined by the file system and are not examined by any other part of the system.  It should contain enough
     information to uniquely identify a file within the file system as well as noticing when a file has been removed and the file system resources
     have been reused for a new file.  For instance, UFS file system stores the inode number and inode generation counter in its filehandle.

     A call to VFS_FHTOVP() should generally be preceded by a call to VFS_CHECKEXP(9) to check if the file is accessible to the client.

RETURN VALUES

     The locked vnode for the file will be returned in *vpp.

SEE ALSO

     VFS(9), VFS_CHECKEXP(9), VOP_VPTOFH(9), vnode(9)

AUTHORS

     This manual page was written by Doug Rabson.

BSD
								  January 4, 2010							       BSD