Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 131 insertions, 0 deletions

diff --git a/net/sctp/ssnmap.c b/net/sctp/ssnmap.c
new file mode 100644
index 000000000000..e627d2b451b6
--- /dev/null
+++ b/net/sctp/ssnmap.c
@@ -0,0 +1,131 @@
+/* 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, int 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);
+        }
+}