core: change lk-owner as a 1k buffer

so, NLM can send the lk-owner field directly to the locks translators,
while doing the same effort, also enabled sending maximum of 500 aux gid
over protocol.

Change-Id: I87c2514392748416f7ffe21d5154faad2e413969
Signed-off-by: Amar Tumballi <amar@gluster.com>
BUG: 767229
Reviewed-on: http://review.gluster.com/779
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/libglusterfs/src/lkowner.h b/libglusterfs/src/lkowner.h
new file mode 100644
index 000000000..5fee17b3d
--- /dev/null
+++ b/libglusterfs/src/lkowner.h
@@ -0,0 +1,92 @@
+/*
+  Copyright (c) 2012 Red Hat <http://www.redhat.com/>
+  This file is part of GlusterFS.
+
+  GlusterFS 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 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS 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, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _LK_OWNER_H
+#define _LK_OWNER_H
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#define GF_MAX_LOCK_OWNER_LEN 1024 /* 1kB as per NLM */
+
+/* 16strings-16strings-... */
+#define GF_LKOWNER_BUF_SIZE  ((GF_MAX_LOCK_OWNER_LEN * 2) +     \
+                              (GF_MAX_LOCK_OWNER_LEN / 8))
+
+typedef struct gf_lkowner_ {
+        int  len;
+        char data[GF_MAX_LOCK_OWNER_LEN];
+} gf_lkowner_t;
+
+
+/* LKOWNER to string functions */
+static inline void
+lkowner_unparse (gf_lkowner_t *lkowner, char *buf, int buf_len)
+{
+        int i = 0;
+        int j = 0;
+
+        for (i = 0; i < lkowner->len; i++) {
+                if (i && !(i % 8)) {
+                        buf[j] = '-';
+                        j++;
+                }
+                sprintf (&buf[j], "%02x", lkowner->data[i]);
+                j += 2;
+                if (j == buf_len)
+                        break;
+        }
+        if (j < buf_len)
+                buf[j] = '\0';
+}
+
+static inline void
+set_lk_owner_from_ptr (gf_lkowner_t *lkowner, void *data)
+{
+        int i = 0;
+        int j = 0;
+
+        lkowner->len = sizeof (unsigned long);
+        for (i = 0, j = 0; i < lkowner->len; i++, j += 8) {
+                lkowner->data[i] =  (char)((((unsigned long)data) >> j) & 0xff);
+        }
+}
+
+static inline void
+set_lk_owner_from_uint64 (gf_lkowner_t *lkowner, uint64_t data)
+{
+        int i = 0;
+        int j = 0;
+
+        lkowner->len = 8;
+        for (i = 0, j = 0; i < lkowner->len; i++, j += 8) {
+                lkowner->data[i] =  (char)((data >> j) & 0xff);
+        }
+}
+
+/* Return true if the locks have the same owner */
+static inline int
+is_same_lkowner (gf_lkowner_t *l1, gf_lkowner_t *l2)
+{
+        return ((l1->len == l2->len) && !memcmp(l1->data, l2->data, l1->len));
+}
+
+#endif /* _LK_OWNER_H */