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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/* Ftp connection management
Copyright (C) 1997,2002 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <assert.h>
#include <stdint.h>
#include "ftpfs.h"
/* A particular connection. */
struct ftpfs_conn
{
struct ftp_conn *conn;
struct ftpfs_conn *next;
};
/* For debugging purposes, give each connection a unique integer id. */
static unsigned conn_id = 0;
/* Get an ftp connection to use for an operation. */
error_t
ftpfs_get_ftp_conn (struct ftpfs *fs, struct ftp_conn **conn)
{
struct ftpfs_conn *fsc;
spin_lock (&fs->conn_lock);
fsc = fs->free_conns;
if (fsc)
fs->free_conns = fsc->next;
spin_unlock (&fs->conn_lock);
if (! fsc)
{
error_t err;
fsc = malloc (sizeof (struct ftpfs_conn));
if (! fsc)
return ENOMEM;
err = ftp_conn_create (fs->ftp_params, fs->ftp_hooks, &fsc->conn);
if (! err)
{
/* Set connection type to binary. */
err = ftp_conn_set_type (fsc->conn, "I");
if (err)
ftp_conn_free (fsc->conn);
}
if (err)
{
free (fsc);
return err;
}
/* For debugging purposes, give each connection a unique integer id. */
fsc->conn->hook = (void *)(uintptr_t)conn_id++;
}
spin_lock (&fs->conn_lock);
fsc->next = fs->conns;
fs->conns = fsc;
spin_unlock (&fs->conn_lock);
*conn = fsc->conn;
return 0;
}
/* Return CONN to the pool of free connections in FS. */
void
ftpfs_release_ftp_conn (struct ftpfs *fs, struct ftp_conn *conn)
{
struct ftpfs_conn *fsc, *pfsc;
spin_lock (&fs->conn_lock);
for (pfsc = 0, fsc = fs->conns; fsc; pfsc = fsc, fsc = fsc->next)
if (fsc->conn == conn)
{
if (pfsc)
pfsc->next = fsc->next;
else
fs->conns = fsc->next;
fsc->next = fs->free_conns;
fs->free_conns = fsc;
break;
}
assert (fsc);
spin_unlock (&fs->conn_lock);
}
|
