/*
 * 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"


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



#if !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN80_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;
    struct cell *tcell;
    struct vrequest *treq = NULL;
    afs_int32 code = 0, cellindex;
    afs_int32 ret;

    memcpy((char *)&Sfid, afidp->fid_data, SIZEOF_SMALLFID);

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

    return code;
}
#endif /* AFS_LINUX20_ENV */
