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/****************************************************************
* *
* Copyright (c) 2011-2023 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_ipc.h"
#include "mmrhash.h"
#include <sys/types.h>
#include <gtm_stat.h>
#include <eintr_wrappers.h>
unsigned int gtm_stat_hash(struct stat *statbuf)
{
hash128_state_t state;
gtm_uint16 out16;
uint4 key = 0;
/* This needs to be the classic MurmurHash3 for compatibility with prior versions */
MurmurHash3_x86_32(&statbuf->st_dev, sizeof statbuf->st_dev, key, &key);
MurmurHash3_x86_32(&statbuf->st_ino, sizeof statbuf->st_ino, key, &key);
return key;
}
key_t gtm_ftok(const char *path, int id)
{
int rc;
struct stat statbuf;
uint4 key;
STAT_FILE(path, &statbuf, rc);
if (rc < 0)
{
return (key_t)-1;
}
key = gtm_stat_hash(&statbuf);
/* substitute the id for the top 8 bits of the hash */
key &= 0x00ffffff;
key |= (id & 0xff) << 24;
return (key_t)key;
}
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