vfs(9) [freebsd man page]

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

NAME

     VFS -- kernel interface to file systems

DESCRIPTION

     Calls used to set or query file systems for settings or information.

     File systems that do not implement a VFS operation should use the appropriate vfs_std function from src/sys/kern/vfs_default.c rather than
     implementing empty functions or casting to eopnotsupp.

SEE ALSO

     VFS_CHECKEXP(9), VFS_FHTOVP(9), VFS_INIT(9), VFS_MOUNT(9), VFS_QUOTACTL(9), VFS_SET(9), VFS_STATFS(9), VFS_SYNC(9), VFS_UNMOUNT(9),
     VFS_VGET(9), vnode(9), VOP_VPTOFH(9)

AUTHORS

     This manual page was written by Doug Rabson.

BSD
								 February 9, 2010							       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