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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

NAME | SYNOPSIS | DESCRIPTION | PSEUDOCODE | SEE ALSO | AUTHORS

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