2 Unix SMB/CIFS implementation.
3 Manage smbsrv_handle structures
4 Copyright (C) Stefan Metzmacher 2006
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.
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.
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.
22 #include "lib/util/dlinklist.h"
23 #include "smb_server/smb_server.h"
24 #include "ntvfs/ntvfs.h"
27 /****************************************************************************
28 init the handle structures
29 ****************************************************************************/
30 NTSTATUS
smbsrv_init_handles(struct smbsrv_tcon
*tcon
, uint64_t limit
)
33 * the idr_* functions take 'int' as limit,
34 * and only work with a max limit 0x00FFFFFF
38 tcon
->handles
.idtree_hid
= idr_init(tcon
);
39 NT_STATUS_HAVE_NO_MEMORY(tcon
->handles
.idtree_hid
);
40 tcon
->handles
.idtree_limit
= limit
;
41 tcon
->handles
.list
= NULL
;
46 /****************************************************************************
47 find a handle given a handle id
48 ****************************************************************************/
49 static struct smbsrv_handle
*smbsrv_handle_find(struct smbsrv_handles_context
*handles_ctx
,
50 uint64_t hid
, struct timeval request_time
)
53 struct smbsrv_handle
*handle
;
55 if (hid
== 0) return NULL
;
57 if (hid
> handles_ctx
->idtree_limit
) return NULL
;
59 p
= idr_find(handles_ctx
->idtree_hid
, hid
);
62 handle
= talloc_get_type(p
, struct smbsrv_handle
);
63 if (!handle
) return NULL
;
65 /* only give it away when the ntvfs subsystem has made the handle valid */
66 if (!handle
->ntvfs
) return NULL
;
68 handle
->statistics
.last_use_time
= request_time
;
73 struct smbsrv_handle
*smbsrv_smb_handle_find(struct smbsrv_tcon
*smb_tcon
,
74 uint16_t fnum
, struct timeval request_time
)
76 return smbsrv_handle_find(&smb_tcon
->handles
, fnum
, request_time
);
79 struct smbsrv_handle
*smbsrv_smb2_handle_find(struct smbsrv_tcon
*smb_tcon
,
80 uint64_t hid
, struct timeval request_time
)
82 return smbsrv_handle_find(&smb_tcon
->handles
, hid
, request_time
);
86 destroy a connection structure
88 static int smbsrv_handle_destructor(struct smbsrv_handle
*handle
)
90 struct smbsrv_handles_context
*handles_ctx
;
92 handles_ctx
= &handle
->tcon
->handles
;
94 idr_remove(handles_ctx
->idtree_hid
, handle
->hid
);
95 DLIST_REMOVE(handles_ctx
->list
, handle
);
96 DLIST_REMOVE(handle
->session
->handles
, &handle
->session_item
);
98 /* tell the ntvfs backend that we are disconnecting */
100 talloc_free(handle
->ntvfs
);
101 handle
->ntvfs
= NULL
;
108 find first available handle slot
110 struct smbsrv_handle
*smbsrv_handle_new(struct smbsrv_session
*session
,
111 struct smbsrv_tcon
*tcon
,
113 struct timeval request_time
)
115 struct smbsrv_handles_context
*handles_ctx
= &tcon
->handles
;
116 struct smbsrv_handle
*handle
;
119 handle
= talloc_zero(mem_ctx
, struct smbsrv_handle
);
120 if (!handle
) return NULL
;
122 handle
->session
= session
;
124 i
= idr_get_new_above(handles_ctx
->idtree_hid
, handle
, 1, handles_ctx
->idtree_limit
);
126 DEBUG(1,("ERROR! Out of handle structures\n"));
130 handle
->session_item
.handle
= handle
;
132 DLIST_ADD(handles_ctx
->list
, handle
);
133 DLIST_ADD(session
->handles
, &handle
->session_item
);
134 talloc_set_destructor(handle
, smbsrv_handle_destructor
);
136 /* now fill in some statistics */
137 handle
->statistics
.open_time
= request_time
;
138 handle
->statistics
.last_use_time
= request_time
;