53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/****************************************************************
|
|
* *
|
|
* Copyright 2010, 2013 Fidelity Information Services, Inc *
|
|
* *
|
|
* 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 "have_crit.h"
|
|
#include "eintr_wrappers.h"
|
|
#include "get_fs_block_size.h"
|
|
|
|
#ifndef VMS
|
|
#include "gtm_statvfs.h"
|
|
#endif
|
|
|
|
uint4 get_fs_block_size(int fd)
|
|
{
|
|
# ifndef VMS
|
|
struct statvfs bufvfs;
|
|
int status;
|
|
# endif
|
|
uint4 gtm_fs_block_size;
|
|
unsigned long sys_fs_block_size;
|
|
|
|
# if defined(__vms)
|
|
sys_fs_block_size = DISK_BLOCK_SIZE;
|
|
# else
|
|
FSTATVFS(fd, &bufvfs, status);
|
|
assert(-1 != status);
|
|
assert(SIZEOF(sys_fs_block_size) == SIZEOF(bufvfs.f_frsize));
|
|
/* If fstatvfs call fails, we dont know what the underlying filesystem size is.
|
|
* We found some NFS implementations return bufvfs.f.frsize values that are inappropriate.
|
|
* Instead of erroring out at this point, we assume a safe value (4K) and continue as much as we can.
|
|
*/
|
|
sys_fs_block_size = ((-1 == status) || (MAX_IO_BLOCK_SIZE < bufvfs.f_frsize)
|
|
|| (DISK_BLOCK_SIZE > bufvfs.f_frsize)) ? 4096 : bufvfs.f_frsize;
|
|
# endif
|
|
/* Fit file system block size in a 4-byte unsigned integer as that is the size in jnl_buffer.
|
|
* Assert that we never get a block size > what can be held in a 4-byte unsigned integer.
|
|
*/
|
|
gtm_fs_block_size = (uint4)sys_fs_block_size;
|
|
assert(gtm_fs_block_size == sys_fs_block_size);
|
|
assert(MAX_IO_BLOCK_SIZE >= gtm_fs_block_size);
|
|
assert(MAX_IO_BLOCK_SIZE % gtm_fs_block_size == 0);
|
|
return gtm_fs_block_size;
|
|
}
|