debian man page for vfs_getnewfsid

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

NAME
     vfs_getnewfsid -- allocate a new file system identifier

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

     void
     vfs_getnewfsid(struct mount *mp);

DESCRIPTION
     The vfs_getnewfsid() function allocates a new file system identifier for the mount point given.  File systems typically call vfs_getnewfsid()
     in their mount routine in order to acquire a unique ID within the system which can later be used to uniquely identify the file system via
     calls such as vfs_getvfs(9).

     The actual fsid is made up of two 32 bit integers, that are stored in the statfs structure of mp.	The first integer is unique in the set of
     mounted file systems, while the second holds the file system type.

     typedef struct fsid {
	     int32_t val[2];
     } fsid_t;

PSEUDOCODE
     xxx_mount(struct mount *mp, char *path, caddr_t data,
	     struct nameidata *ndp, struct thread *td)
     {
	     ...
	     vfs_getnewfsid(mp);
	     ...
     }

SEE ALSO
     vfs_getvfs(9)

AUTHORS
     This manual page was written by Chad David <davidc@acns.ab.ca>.

BSD
								 November 21, 2001							       BSD