nfs_Getattr.c

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/*
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * Copyright CEA/DAM/DIF  (2008)
 * 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 <fcntl.h>
#include <sys/file.h>           /* for having FNDELAY */
#include "HashData.h"
#include "HashTable.h"
#include "log.h"
#include "ganesha_rpc.h"
#include "nfs23.h"
#include "nfs4.h"
#include "mount.h"
#include "nfs_core.h"
#include "cache_inode.h"
#include "nfs_exports.h"
#include "nfs_creds.h"
#include "nfs_proto_functions.h"
#include "nfs_tools.h"
#include "nfs_proto_tools.h"

int nfs_Getattr(nfs_arg_t *parg,
                exportlist_t *pexport,
                fsal_op_context_t *pcontext,
                nfs_worker_data_t *pworker,
                struct svc_req *preq,
                nfs_res_t *pres)
{
  fsal_attrib_list_t attr;
  cache_entry_t *pentry = NULL;
  cache_inode_status_t cache_status;
  int rc = NFS_REQ_OK;

  if(isDebug(COMPONENT_NFSPROTO))
    {
      char str[LEN_FH_STR];
      nfs_FhandleToStr(preq->rq_vers,
                       &(parg->arg_getattr2),
                       &(parg->arg_getattr3.object),
                       NULL,
                       str);
      LogDebug(COMPONENT_NFSPROTO,
               "REQUEST PROCESSING: Calling nfs_Getattr handle: %s", str);
    }

  if((pentry = nfs_FhandleToCache(preq->rq_vers,
                                  &(parg->arg_getattr2),
                                  &(parg->arg_getattr3.object),
                                  NULL,
                                  &(pres->res_attr2.status),
                                  &(pres->res_getattr3.status),
                                  NULL, &attr, pcontext, &rc)) == NULL)
    {
      /* Stale NFS FH ? */
      LogFullDebug(COMPONENT_NFSPROTO,
                   "nfs_Getattr returning %d", rc);
      goto out;
    }

  if((preq->rq_vers == NFS_V3) && (nfs3_Is_Fh_Xattr(&(parg->arg_getattr3.object))))
    {
      rc = nfs3_Getattr_Xattr(parg, pexport, pcontext, preq, pres);
      LogFullDebug(COMPONENT_NFSPROTO,
                   "nfs_Getattr returning %d from nfs3_Getattr_Xattr", rc);
      goto out;
    }

  /*
   * Get attributes.  Use NULL for the file name since we have the
   * vnode to define the file.
   */
  if(cache_inode_getattr(pentry,
                         &attr,
                         pcontext, &cache_status) == CACHE_INODE_SUCCESS)
    {
      /*
       * Client API should be keeping us from crossing junctions,
       * but double check to be sure.
       */

      switch (preq->rq_vers)
        {

        case NFS_V2:
          /* Copy data from vattr to Attributes */
          if(nfs2_FSALattr_To_Fattr(pexport, &attr,
                                    &(pres->res_attr2.ATTR2res_u.attributes)) == 0)
            {
              nfs_SetFailedStatus(pcontext, pexport,
                                  preq->rq_vers,
                                  CACHE_INODE_INVALID_ARGUMENT,
                                  &pres->res_attr2.status,
                                  &pres->res_getattr3.status,
                                  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
              LogFullDebug(COMPONENT_NFSPROTO,
                           "nfs_Getattr set failed status v2");
              rc = NFS_REQ_OK;
              goto out;
            }
          pres->res_attr2.status = NFS_OK;
          break;

        case NFS_V3:
          if(nfs3_FSALattr_To_Fattr(pexport, &attr,
                                    &(pres->res_getattr3.GETATTR3res_u.resok.
                                      obj_attributes)) == 0)
            {
              nfs_SetFailedStatus(pcontext, pexport,
                                  preq->rq_vers,
                                  CACHE_INODE_INVALID_ARGUMENT,
                                  &pres->res_attr2.status,
                                  &pres->res_getattr3.status,
                                  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);

              LogFullDebug(COMPONENT_NFSPROTO,
                           "nfs_Getattr set failed status v3");
              rc = NFS_REQ_OK;
              goto out;
            }
          pres->res_getattr3.status = NFS3_OK;
          break;
        }                       /* switch */

      LogFullDebug(COMPONENT_NFSPROTO, "nfs_Getattr succeeded");
      rc = NFS_REQ_OK;
      goto out;
    }

  LogFullDebug(COMPONENT_CACHE_INODE,"nfs_Getattr: cache_inode_get() "
               "returned cache status %d(%s)",
               cache_status, cache_inode_err_str(cache_status));

  if (cache_status != CACHE_INODE_FSAL_ESTALE)
    cache_status = CACHE_INODE_INVALID_ARGUMENT;

  nfs_SetFailedStatus(pcontext, pexport,
                      preq->rq_vers,
                      cache_status,
                      &pres->res_attr2.status,
                      &pres->res_getattr3.status,
                      NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);

  LogFullDebug(COMPONENT_NFSPROTO, "nfs_Getattr set failed status");

  rc = NFS_REQ_OK;

out:
  /* return references */
  if (pentry)
      cache_inode_put(pentry);

  return (rc);

}                               /* nfs_Getattr */

void nfs_Getattr_Free(nfs_res_t * resp)
{
  /* Nothing to do here */
  return;
}                               /* nfs_Getattr_Free */