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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _LK_OWNER_H
#define _LK_OWNER_H
#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], "%02hhx", 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));
}
static inline int
is_lk_owner_null (gf_lkowner_t *lkowner)
{
int is_null = 1;
int i = 0;
if (lkowner == NULL || lkowner->len == 0)
goto out;
for (i = 0; i < lkowner->len; i++) {
if (lkowner->data[i] != 0) {
is_null = 0;
break;
}
}
out:
return is_null;
}
#endif /* _LK_OWNER_H */
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