1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
Copyright (C) 1994,95,96,2001 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
#include <string.h>
#include <assert.h>
/* Build and return in CRED a protid which has no user identification, for
peropen PO. On success, consume a reference to PO. */
error_t
diskfs_start_protid (struct peropen *po, struct protid **cred)
{
error_t err =
ports_create_port_noinstall (diskfs_protid_class, diskfs_port_bucket,
sizeof (struct protid), cred);
if (! err)
{
/* Consume a reference to po. */
(*cred)->po = po;
(*cred)->shared_object = MACH_PORT_NULL;
(*cred)->mapped = 0;
}
return err;
}
/* Finish building protid CRED started with diskfs_start_protid;
the user to install is USER. */
void
diskfs_finish_protid (struct protid *cred, struct iouser *user)
{
error_t err;
if (!user)
err = iohelp_create_simple_iouser (&cred->user, 0, 0);
else
err = iohelp_dup_iouser (&cred->user, user);
assert_perror (err);
err = mach_port_move_member (mach_task_self (), cred->pi.port_right,
diskfs_port_bucket->portset);
assert_perror (err);
}
/* Create and return a protid for an existing peropen PO in CRED for
USER. On success, consume a reference to PO. */
error_t
diskfs_create_protid (struct peropen *po, struct iouser *user,
struct protid **cred)
{
error_t err = diskfs_start_protid (po, cred);
if (! err)
diskfs_finish_protid (*cred, user);
return err;
}
|
