/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * System independent part of vget VFS call.
 */

#include <afsconfig.h>
#include "../afs/param.h"

RCSID("$Header: /cvs/openafs/src/afs/afs_osi_vget.c,v 1.5.2.2 2003/03/06 14:53:25 shadow Exp $");

#include "../afs/sysincludes.h"	/* Standard vendor system headers */
#include "../afs/afsincludes.h"	/* Afs-based standard headers */
#include "../afs/afs_stats.h"   /* statistics stuff */



#if !defined(AFS_LINUX20_ENV)
/* This is the common part of the vget VFS call. */
int afs_osi_vget(struct vcache **avcpp, struct fid *afidp,
		 struct vrequest *areqp)
{
    struct VenusFid vfid;
    struct SmallFid Sfid;
    register struct cell *tcell;
    struct vrequest treq;
    register afs_int32 code = 0, cellindex;
    afs_int32 ret;

    memcpy((char *)&Sfid, afidp->fid_data, SIZEOF_SMALLFID);
#ifdef AFS_OSF_ENV
    Sfid.Vnode = afidp->fid_reserved;
#endif

    /* Need to extract fid from SmallFid. Will need a wild card option for
     * finding the right vcache entry.
     */
    cellindex = (Sfid.CellAndUnique >> 24) & 0xff;
    tcell = afs_GetCellByIndex(cellindex, READ_LOCK);
    if (!tcell)
	return ENOENT;
    vfid.Cell = tcell->cellNum;
    afs_PutCell(tcell, WRITE_LOCK);
    vfid.Fid.Volume = Sfid.Volume;
    vfid.Fid.Vnode = Sfid.Vnode;
    vfid.Fid.Unique = Sfid.CellAndUnique & 0xffffff;

    /* First attempt to find in cache using wildcard. If that fails,
     * try the usual route to try to get the vcache from the server.
     * This could be done better by splitting out afs_FindVCache from
     * afs_GetVCache.
     */

    ret = afs_NFSFindVCache(avcpp, &vfid, 1);
    if (ret > 1) {
	/* More than one entry matches. */
	code = ENOENT;
    }
    else if (ret == 0) {
	/* didn't find an entry. */
	*avcpp = afs_GetVCache(&vfid, &treq, (afs_int32 *)0, (struct vcache*)0, 0);
    }
    if (! *avcpp) {
	code = ENOENT;
    }

    return code;
}
#endif /* AFS_LINUX20_ENV */
