9p_lcreate.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 <sys/stat.h>
#include "nfs_core.h"
#include "log.h"
#include "cache_inode.h"
#include "fsal.h"
#include "9p.h"

int _9p_lcreate( _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 ;
  u32  * flags  = NULL ;
  u32  * mode   = NULL ;
  u32  * gid    = NULL ;
  u16  * name_len = NULL ;
  char * name_str = NULL ;

  _9p_fid_t * pfid = NULL ;
  _9p_qid_t qid_newfile ;
  u32 iounit = 0 ;

  cache_entry_t       * pentry_newfile = NULL ;
  fsal_name_t           file_name ; 
  fsal_attrib_list_t    fsalattr ;
  cache_inode_status_t  cache_status ;
  fsal_openflags_t      openflags = 0 ;

  if ( !preq9p || !pworker_data || !plenout || !preply )
   return -1 ;
  /* Get data */
  _9p_getptr( cursor, msgtag, u16 ) ; 

  _9p_getptr( cursor, fid,    u32 ) ; 
  _9p_getstr( cursor, name_len, name_str ) ;
  _9p_getptr( cursor, flags,  u32 ) ;
  _9p_getptr( cursor, mode,   u32 ) ;
  _9p_getptr( cursor, gid,    u32 ) ;

  LogDebug( COMPONENT_9P, "TLCREATE: tag=%u fid=%u name=%.*s flags=0%o mode=0%o gid=%u",
            (u32)*msgtag, *fid, *name_len, name_str, *flags, *mode, *gid ) ;

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

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

   snprintf( file_name.name, FSAL_MAX_NAME_LEN, "%.*s", *name_len, name_str ) ;
   file_name.len = *name_len+1 ;

   /* Create the file */

   /* BUGAZOMEU: @todo : the gid parameter is not used yet, flags is not yet used */
   if( ( pentry_newfile = cache_inode_create( pfid->pentry,
                                              &file_name,
                                              REGULAR_FILE,
                                              *mode,
                                              NULL,
                                              &fsalattr,
                                              &pfid->fsal_op_context, 
                                              &cache_status)) == NULL)
     return  _9p_rerror( preq9p, msgtag,  _9p_tools_errno( cache_status ) , plenout, preply ) ;
      
   _9p_openflags2FSAL( flags, &openflags ) ; 

   if(cache_inode_open( pentry_newfile, 
                        openflags, 
                        &pfid->fsal_op_context,
                        0, 
                        &cache_status) != CACHE_INODE_SUCCESS) 
     return _9p_rerror( preq9p, msgtag, _9p_tools_errno( cache_status ), plenout, preply ) ;

   /* Build the qid */
   qid_newfile.type    = _9P_QTFILE ;
   qid_newfile.version = 0 ;
   qid_newfile.path    = fsalattr.fileid ;

   iounit = 0 ; /* default value */

   /* The fid will represent the new file now */
   pfid->pentry = pentry_newfile ;
   pfid->qid = qid_newfile ;
   pfid->specdata.xattr.xattr_id = 0 ;
   pfid->specdata.xattr.xattr_content = NULL ;


   /* Build the reply */
  _9p_setinitptr( cursor, preply, _9P_RLCREATE ) ;
  _9p_setptr( cursor, msgtag, u16 ) ;

  _9p_setqid( cursor, qid_newfile ) ;
  _9p_setvalue( cursor, iounit, u32 ) ;

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

  LogDebug( COMPONENT_9P, 
            "RLCREATE: tag=%u fid=%u name=%.*s qid=(type=%u,version=%u,path=%llu) iounit=%u",
            (u32)*msgtag, *fid, *name_len, name_str, qid_newfile.type, qid_newfile.version, (unsigned long long)qid_newfile.path, iounit ) ;

  return 1 ;
}