VFS_GETVFS(9) |
FreeBSD Kernel Developer's Manual |
VFS_GETVFS(9) |
NAME
vfs_getvfs —
returns a mount point given its file system identifier
DESCRIPTION
The
vfs_getvfs() function returns the mount point structure for a file system given its file system identifier. The file system ID should have been allocated by calling
vfs_getnewfsid(9); otherwise, it will not be found.
A major user of vfs_getvfs() is NFS, which uses the fsid as part of file handles in order to determine the file system a given RPC is for. If vfs_getvfs() fails to find the mount point related to fsid, the file system is considered stale.
RETURN VALUES
If
fsid is found, the mount point for the ID is returned; otherwise,
NULL is returned.
PSEUDOCODE
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
error = ESTALE;
goto out;
}
AUTHORS
This manual page was written by
Chad David <davidc@acns.ab.ca>.