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-rw-r--r--libglusterfs/src/lkowner.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/libglusterfs/src/lkowner.h b/libglusterfs/src/lkowner.h
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+++ b/libglusterfs/src/lkowner.h
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+/*
+ 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 */