source4/ntvfs/ntvfs_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NTVFS utility code
   4    Copyright (C) Stefan Metzmacher 2004
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20 /*
  21   this implements common utility functions that many NTVFS backends may wish to use
  22 */
  23
  24 #include "includes.h"
  25 #include "dlinklist.h"
  26 #include "ntvfs/ntvfs.h"
  27
  28
  29 _PUBLIC_ struct ntvfs_request *ntvfs_request_create(struct ntvfs_context *ctx, TALLOC_CTX *mem_ctx,
  30                                                     struct auth_session_info *session_info,
  31                                                     uint16_t smbpid, uint16_t smbmid,
  32                                                     struct timeval request_time,
  33                                                     void *private_data,
  34                                                     void (*send_fn)(struct ntvfs_request *),
  35                                                     uint32_t state)
  36 {
  37         struct ntvfs_request *req;
  38         struct ntvfs_async_state *async;
  39
  40         req = talloc(mem_ctx, struct ntvfs_request);
  41         if (!req) return NULL;
  42         req->ctx                        = ctx;
  43         req->async_states               = NULL;
  44         req->session_info               = session_info;
  45         req->smbpid                     = smbpid;
  46         req->smbmid                     = smbmid;
  47         req->statistics.request_time    = request_time;
  48
  49         async = talloc(req, struct ntvfs_async_state);
  50         if (!async) goto failed;
  51
  52         async->state            = state;
  53         async->private_data     = private_data;
  54         async->send_fn          = send_fn;
  55         async->status           = NT_STATUS_INTERNAL_ERROR;
  56         async->ntvfs            = NULL;
  57
  58         DLIST_ADD(req->async_states, async);
  59
  60         return req;
  61
  62 failed:
  63         return NULL;
  64 }
  65
  66 _PUBLIC_ NTSTATUS ntvfs_async_state_push(struct ntvfs_module_context *ntvfs,
  67                                          struct ntvfs_request *req,
  68                                          void *private_data,
  69                                          void (*send_fn)(struct ntvfs_request *))
  70 {
  71         struct ntvfs_async_state *async;
  72
  73         async = talloc(req, struct ntvfs_async_state);
  74         NT_STATUS_HAVE_NO_MEMORY(async);
  75
  76         async->state            = req->async_states->state;
  77         async->private_data     = private_data;
  78         async->send_fn          = send_fn;
  79         async->status           = NT_STATUS_INTERNAL_ERROR;
  80
  81         async->ntvfs            = ntvfs;
  82
  83         DLIST_ADD(req->async_states, async);
  84
  85         return NT_STATUS_OK;
  86 }
  87
  88 _PUBLIC_ void ntvfs_async_state_pop(struct ntvfs_request *req)
  89 {
  90         struct ntvfs_async_state *async;
  91
  92         async = req->async_states;
  93
  94         DLIST_REMOVE(req->async_states, async);
  95
  96         req->async_states->state        = async->state;
  97         req->async_states->status       = async->status;
  98
  99         talloc_free(async);
 100 }