9p_clunk.c

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/*
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * Copyright CEA/DAM/DIF  (2011)
 * contributeur : Philippe DENIEL   philippe.deniel@cea.fr
 *                Thomas LEIBOVICI  thomas.leibovici@cea.fr
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * ---------------------------------------
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef _SOLARIS
#include "solaris_port.h"
#endif

#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include "nfs_core.h"
#include "log.h"
#include "cache_inode.h"
#include "fsal.h"
#include "9p.h"


int _9p_clunk( _9p_request_data_t * preq9p,
               void  * pworker_data,
               u32 * plenout,
               char * preply)
{
  char * cursor = preq9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE ;

  u16 * msgtag = NULL ;
  u32 * fid    = NULL ;

  _9p_fid_t * pfid = NULL ;
  cache_inode_status_t cache_status ;

  if ( !preq9p || !pworker_data || !plenout || !preply )
   return -1 ;

  /* Get data */
  _9p_getptr( cursor, msgtag, u16 ) ; 
  _9p_getptr( cursor, fid,    u32 ) ; 

  LogDebug( COMPONENT_9P, "TCLUNK: tag=%u fid=%u", (u32)*msgtag, *fid ) ;

  if( *fid >= _9P_FID_PER_CONN )
    return _9p_rerror( preq9p, msgtag, ERANGE, plenout, preply ) ;

  pfid =  &preq9p->pconn->fids[*fid] ;

  /* If the fid is related to a xattr, free the related memory */
  if( pfid->specdata.xattr.xattr_content != NULL )
    gsh_free( pfid->specdata.xattr.xattr_content ) ;

  /* If object is an opened file, close it */
  if( ( pfid->pentry->type == REGULAR_FILE ) && 
      ( cache_inode_fd( pfid->pentry ) != NULL ) )
   {
     if(cache_inode_close( pfid->pentry,
                           CACHE_INODE_FLAG_REALLYCLOSE, // A clunk is associated with an actual close on the client side
                           &cache_status) != CACHE_INODE_SUCCESS)
        return _9p_rerror( preq9p, msgtag, _9p_tools_errno( cache_status ), plenout, preply ) ;
   }

  /* Clean the fid */
  memset( (char *)pfid, 0, sizeof( _9p_fid_t ) ) ;

  /* Build the reply */
  _9p_setinitptr( cursor, preply, _9P_RCLUNK ) ;
  _9p_setptr( cursor, msgtag, u16 ) ;

  _9p_setendptr( cursor, preply ) ;
  _9p_checkbound( cursor, preply, plenout ) ;

  LogDebug( COMPONENT_9P, "RCLUNK: tag=%u fid=%u", (u32)*msgtag, *fid ) ;

  return 1 ;
}