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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [tags/] [linux-2.6/] [linux-2.6.24_or32_unified_v2.3/] [net/] [sctp/] [ssnmap.c] - Blame information for rev 8

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/* SCTP kernel reference Implementation
 * Copyright (c) 2003 International Business Machines, Corp.
 *
 * This file is part of the SCTP kernel reference Implementation
 *
 * These functions manipulate sctp SSN tracker.
 *
 * The SCTP reference implementation 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 SCTP reference implementation 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 GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <lksctp-developers@lists.sourceforge.net>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * Written or modified by:
 *    Jon Grimm             <jgrimm@us.ibm.com>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */
 
#include <linux/types.h>
#include <net/sctp/sctp.h>
#include <net/sctp/sm.h>
 
#define MAX_KMALLOC_SIZE        131072
 
static struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *map, __u16 in,
                                            __u16 out);
 
/* Storage size needed for map includes 2 headers and then the
 * specific needs of in or out streams.
 */
static inline size_t sctp_ssnmap_size(__u16 in, __u16 out)
{
        return sizeof(struct sctp_ssnmap) + (in + out) * sizeof(__u16);
}
 
 
/* Create a new sctp_ssnmap.
 * Allocate room to store at least 'len' contiguous TSNs.
 */
struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out,
                                    gfp_t gfp)
{
        struct sctp_ssnmap *retval;
        int size;
 
        size = sctp_ssnmap_size(in, out);
        if (size <= MAX_KMALLOC_SIZE)
                retval = kmalloc(size, gfp);
        else
                retval = (struct sctp_ssnmap *)
                          __get_free_pages(gfp, get_order(size));
        if (!retval)
                goto fail;
 
        if (!sctp_ssnmap_init(retval, in, out))
                goto fail_map;
 
        retval->malloced = 1;
        SCTP_DBG_OBJCNT_INC(ssnmap);
 
        return retval;
 
fail_map:
        if (size <= MAX_KMALLOC_SIZE)
                kfree(retval);
        else
                free_pages((unsigned long)retval, get_order(size));
fail:
        return NULL;
}
 
 
/* Initialize a block of memory as a ssnmap.  */
static struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *map, __u16 in,
                                            __u16 out)
{
        memset(map, 0x00, sctp_ssnmap_size(in, out));
 
        /* Start 'in' stream just after the map header. */
        map->in.ssn = (__u16 *)&map[1];
        map->in.len = in;
 
        /* Start 'out' stream just after 'in'. */
        map->out.ssn = &map->in.ssn[in];
        map->out.len = out;
 
        return map;
}
 
/* Clear out the ssnmap streams.  */
void sctp_ssnmap_clear(struct sctp_ssnmap *map)
{
        size_t size;
 
        size = (map->in.len + map->out.len) * sizeof(__u16);
        memset(map->in.ssn, 0x00, size);
}
 
/* Dispose of a ssnmap.  */
void sctp_ssnmap_free(struct sctp_ssnmap *map)
{
        if (map && map->malloced) {
                int size;
 
                size = sctp_ssnmap_size(map->in.len, map->out.len);
                if (size <= MAX_KMALLOC_SIZE)
                        kfree(map);
                else
                        free_pages((unsigned long)map, get_order(size));
                SCTP_DBG_OBJCNT_DEC(ssnmap);
        }
}

Line No.	Rev	Author	Line
1	3	xianfeng	`/* SCTP kernel reference Implementation`
2			`* Copyright (c) 2003 International Business Machines, Corp.`
3			`*`
4			`* This file is part of the SCTP kernel reference Implementation`
5			`*`
6			`* These functions manipulate sctp SSN tracker.`
7			`*`
8			`* The SCTP reference implementation is free software;`
9			`* you can redistribute it and/or modify it under the terms of`
10			`* the GNU General Public License as published by`
11			`* the Free Software Foundation; either version 2, or (at your option)`
12			`* any later version.`
13			`*`
14			`* The SCTP reference implementation is distributed in the hope that it`
15			`* will be useful, but WITHOUT ANY WARRANTY; without even the implied`
16			`* ************************`
17			`* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.`
18			`* See the GNU General Public License for more details.`
19			`*`
20			`* You should have received a copy of the GNU General Public License`
21			`* along with GNU CC; see the file COPYING. If not, write to`
22			`* the Free Software Foundation, 59 Temple Place - Suite 330,`
23			`* Boston, MA 02111-1307, USA.`
24			`*`
25			`* Please send any bug reports or fixes you make to the`
26			`* email address(es):`
27			`* lksctp developers <lksctp-developers@lists.sourceforge.net>`
28			`*`
29			`* Or submit a bug report through the following website:`
30			`* http://www.sf.net/projects/lksctp`
31			`*`
32			`* Written or modified by:`
33			`* Jon Grimm <jgrimm@us.ibm.com>`
34			`*`
35			`* Any bugs reported given to us we will try to fix... any fixes shared will`
36			`* be incorporated into the next SCTP release.`
37			`*/`
38
39			`#include <linux/types.h>`
40			`#include <net/sctp/sctp.h>`
41			`#include <net/sctp/sm.h>`
42
43			`#define MAX_KMALLOC_SIZE 131072`
44
45			`static struct sctp_ssnmap sctp_ssnmap_init(struct sctp_ssnmap map, __u16 in,`
46			`__u16 out);`
47
48			`/* Storage size needed for map includes 2 headers and then the`
49			`* specific needs of in or out streams.`
50			`*/`
51			`static inline size_t sctp_ssnmap_size(__u16 in, __u16 out)`
52			`{`
53			`return sizeof(struct sctp_ssnmap) + (in + out) * sizeof(__u16);`
54			`}`
55
56
57			`/* Create a new sctp_ssnmap.`
58			`* Allocate room to store at least 'len' contiguous TSNs.`
59			`*/`
60			`struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out,`
61			`gfp_t gfp)`
62			`{`
63			`struct sctp_ssnmap *retval;`
64			`int size;`
65
66			`size = sctp_ssnmap_size(in, out);`
67			`if (size <= MAX_KMALLOC_SIZE)`
68			`retval = kmalloc(size, gfp);`
69			`else`
70			`retval = (struct sctp_ssnmap *)`
71			`__get_free_pages(gfp, get_order(size));`
72			`if (!retval)`
73			`goto fail;`
74
75			`if (!sctp_ssnmap_init(retval, in, out))`
76			`goto fail_map;`
77
78			`retval->malloced = 1;`
79			`SCTP_DBG_OBJCNT_INC(ssnmap);`
80
81			`return retval;`
82
83			`fail_map:`
84			`if (size <= MAX_KMALLOC_SIZE)`
85			`kfree(retval);`
86			`else`
87			`free_pages((unsigned long)retval, get_order(size));`
88			`fail:`
89			`return NULL;`
90			`}`
91
92
93			`/* Initialize a block of memory as a ssnmap. */`
94			`static struct sctp_ssnmap sctp_ssnmap_init(struct sctp_ssnmap map, __u16 in,`
95			`__u16 out)`
96			`{`
97			`memset(map, 0x00, sctp_ssnmap_size(in, out));`
98
99			`/* Start 'in' stream just after the map header. */`
100			`map->in.ssn = (__u16 *)&map[1];`
101			`map->in.len = in;`
102
103			`/* Start 'out' stream just after 'in'. */`
104			`map->out.ssn = &map->in.ssn[in];`
105			`map->out.len = out;`
106
107			`return map;`
108			`}`
109
110			`/* Clear out the ssnmap streams. */`
111			`void sctp_ssnmap_clear(struct sctp_ssnmap *map)`
112			`{`
113			`size_t size;`
114
115			`size = (map->in.len + map->out.len) * sizeof(__u16);`
116			`memset(map->in.ssn, 0x00, size);`
117			`}`
118
119			`/* Dispose of a ssnmap. */`
120			`void sctp_ssnmap_free(struct sctp_ssnmap *map)`
121			`{`
122			`if (map && map->malloced) {`
123			`int size;`
124
125			`size = sctp_ssnmap_size(map->in.len, map->out.len);`
126			`if (size <= MAX_KMALLOC_SIZE)`
127			`kfree(map);`
128			`else`
129			`free_pages((unsigned long)map, get_order(size));`
130			`SCTP_DBG_OBJCNT_DEC(ssnmap);`
131			`}`
132			`}`

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[/] [or1k_soc_on_altera_embedded_dev_kit/] [tags/] [linux-2.6/] [linux-2.6.24_or32_unified_v2.3/] [net/] [sctp/] [ssnmap.c] - Blame information for rev 8