mirror of https://gitee.com/openkylin/linux.git
xfs: use generic get_unaligned_beXX helpers
Switch the shortform directory code over to use the generic get_unaligned_beXX helpers instead of reinventing them. As a result kill off xfs_arch.h and move the setting of XFS_NATIVE_HOST into xfs_linux.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig
parent
2282396d81
commit
218106a110
|
|
@ -33,7 +33,6 @@
|
|||
#endif
|
||||
|
||||
#include <xfs_types.h>
|
||||
#include <xfs_arch.h>
|
||||
|
||||
#include <kmem.h>
|
||||
#include <mrlock.h>
|
||||
|
|
@ -88,6 +87,12 @@
|
|||
#include <xfs_buf.h>
|
||||
#include <xfs_message.h>
|
||||
|
||||
#ifdef __BIG_ENDIAN
|
||||
#define XFS_NATIVE_HOST 1
|
||||
#else
|
||||
#undef XFS_NATIVE_HOST
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Feature macros (disable/enable)
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -1,136 +0,0 @@
|
|||
/*
|
||||
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
|
||||
* All Rights Reserved.
|
||||
*
|
||||
* This program 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.
|
||||
*
|
||||
* This program is distributed in the hope that it would 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, write the Free Software Foundation,
|
||||
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
#ifndef __XFS_ARCH_H__
|
||||
#define __XFS_ARCH_H__
|
||||
|
||||
#ifndef XFS_BIG_INUMS
|
||||
# error XFS_BIG_INUMS must be defined true or false
|
||||
#endif
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#include <asm/byteorder.h>
|
||||
|
||||
#ifdef __BIG_ENDIAN
|
||||
#define XFS_NATIVE_HOST 1
|
||||
#else
|
||||
#undef XFS_NATIVE_HOST
|
||||
#endif
|
||||
|
||||
#else /* __KERNEL__ */
|
||||
|
||||
#if __BYTE_ORDER == __BIG_ENDIAN
|
||||
#define XFS_NATIVE_HOST 1
|
||||
#else
|
||||
#undef XFS_NATIVE_HOST
|
||||
#endif
|
||||
|
||||
#ifdef XFS_NATIVE_HOST
|
||||
#define cpu_to_be16(val) ((__force __be16)(__u16)(val))
|
||||
#define cpu_to_be32(val) ((__force __be32)(__u32)(val))
|
||||
#define cpu_to_be64(val) ((__force __be64)(__u64)(val))
|
||||
#define be16_to_cpu(val) ((__force __u16)(__be16)(val))
|
||||
#define be32_to_cpu(val) ((__force __u32)(__be32)(val))
|
||||
#define be64_to_cpu(val) ((__force __u64)(__be64)(val))
|
||||
#else
|
||||
#define cpu_to_be16(val) ((__force __be16)__swab16((__u16)(val)))
|
||||
#define cpu_to_be32(val) ((__force __be32)__swab32((__u32)(val)))
|
||||
#define cpu_to_be64(val) ((__force __be64)__swab64((__u64)(val)))
|
||||
#define be16_to_cpu(val) (__swab16((__force __u16)(__be16)(val)))
|
||||
#define be32_to_cpu(val) (__swab32((__force __u32)(__be32)(val)))
|
||||
#define be64_to_cpu(val) (__swab64((__force __u64)(__be64)(val)))
|
||||
#endif
|
||||
|
||||
static inline void be16_add_cpu(__be16 *a, __s16 b)
|
||||
{
|
||||
*a = cpu_to_be16(be16_to_cpu(*a) + b);
|
||||
}
|
||||
|
||||
static inline void be32_add_cpu(__be32 *a, __s32 b)
|
||||
{
|
||||
*a = cpu_to_be32(be32_to_cpu(*a) + b);
|
||||
}
|
||||
|
||||
static inline void be64_add_cpu(__be64 *a, __s64 b)
|
||||
{
|
||||
*a = cpu_to_be64(be64_to_cpu(*a) + b);
|
||||
}
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
/*
|
||||
* get and set integers from potentially unaligned locations
|
||||
*/
|
||||
|
||||
#define INT_GET_UNALIGNED_16_BE(pointer) \
|
||||
((__u16)((((__u8*)(pointer))[0] << 8) | (((__u8*)(pointer))[1])))
|
||||
#define INT_SET_UNALIGNED_16_BE(pointer,value) \
|
||||
{ \
|
||||
((__u8*)(pointer))[0] = (((value) >> 8) & 0xff); \
|
||||
((__u8*)(pointer))[1] = (((value) ) & 0xff); \
|
||||
}
|
||||
|
||||
/*
|
||||
* In directories inode numbers are stored as unaligned arrays of unsigned
|
||||
* 8bit integers on disk.
|
||||
*
|
||||
* For v1 directories or v2 directories that contain inode numbers that
|
||||
* do not fit into 32bit the array has eight members, but the first member
|
||||
* is always zero:
|
||||
*
|
||||
* |unused|48-55|40-47|32-39|24-31|16-23| 8-15| 0- 7|
|
||||
*
|
||||
* For v2 directories that only contain entries with inode numbers that fit
|
||||
* into 32bits a four-member array is used:
|
||||
*
|
||||
* |24-31|16-23| 8-15| 0- 7|
|
||||
*/
|
||||
|
||||
#define XFS_GET_DIR_INO4(di) \
|
||||
(((__u32)(di).i[0] << 24) | ((di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3]))
|
||||
|
||||
#define XFS_PUT_DIR_INO4(from, di) \
|
||||
do { \
|
||||
(di).i[0] = (((from) & 0xff000000ULL) >> 24); \
|
||||
(di).i[1] = (((from) & 0x00ff0000ULL) >> 16); \
|
||||
(di).i[2] = (((from) & 0x0000ff00ULL) >> 8); \
|
||||
(di).i[3] = ((from) & 0x000000ffULL); \
|
||||
} while (0)
|
||||
|
||||
#define XFS_DI_HI(di) \
|
||||
(((__u32)(di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3]))
|
||||
#define XFS_DI_LO(di) \
|
||||
(((__u32)(di).i[4] << 24) | ((di).i[5] << 16) | ((di).i[6] << 8) | ((di).i[7]))
|
||||
|
||||
#define XFS_GET_DIR_INO8(di) \
|
||||
(((xfs_ino_t)XFS_DI_LO(di) & 0xffffffffULL) | \
|
||||
((xfs_ino_t)XFS_DI_HI(di) << 32))
|
||||
|
||||
#define XFS_PUT_DIR_INO8(from, di) \
|
||||
do { \
|
||||
(di).i[0] = 0; \
|
||||
(di).i[1] = (((from) & 0x00ff000000000000ULL) >> 48); \
|
||||
(di).i[2] = (((from) & 0x0000ff0000000000ULL) >> 40); \
|
||||
(di).i[3] = (((from) & 0x000000ff00000000ULL) >> 32); \
|
||||
(di).i[4] = (((from) & 0x00000000ff000000ULL) >> 24); \
|
||||
(di).i[5] = (((from) & 0x0000000000ff0000ULL) >> 16); \
|
||||
(di).i[6] = (((from) & 0x000000000000ff00ULL) >> 8); \
|
||||
(di).i[7] = ((from) & 0x00000000000000ffULL); \
|
||||
} while (0)
|
||||
|
||||
#endif /* __XFS_ARCH_H__ */
|
||||
|
|
@ -59,11 +59,12 @@ static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
|
|||
static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
|
||||
#endif /* XFS_BIG_INUMS */
|
||||
|
||||
|
||||
/*
|
||||
* Inode numbers in short-form directories can come in two versions,
|
||||
* either 4 bytes or 8 bytes wide. These helpers deal with the
|
||||
* two forms transparently by looking at the headers i8count field.
|
||||
*
|
||||
* For 64-bit inode number the most significant byte must be zero.
|
||||
*/
|
||||
static xfs_ino_t
|
||||
xfs_dir2_sf_get_ino(
|
||||
|
|
@ -71,9 +72,9 @@ xfs_dir2_sf_get_ino(
|
|||
xfs_dir2_inou_t *from)
|
||||
{
|
||||
if (hdr->i8count)
|
||||
return XFS_GET_DIR_INO8(from->i8);
|
||||
return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL;
|
||||
else
|
||||
return XFS_GET_DIR_INO4(from->i4);
|
||||
return get_unaligned_be32(&from->i4.i);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -82,10 +83,12 @@ xfs_dir2_sf_put_ino(
|
|||
xfs_dir2_inou_t *to,
|
||||
xfs_ino_t ino)
|
||||
{
|
||||
ASSERT((ino & 0xff00000000000000ULL) == 0);
|
||||
|
||||
if (hdr->i8count)
|
||||
XFS_PUT_DIR_INO8(ino, to->i8);
|
||||
put_unaligned_be64(ino, &to->i8.i);
|
||||
else
|
||||
XFS_PUT_DIR_INO4(ino, to->i4);
|
||||
put_unaligned_be32(ino, &to->i4.i);
|
||||
}
|
||||
|
||||
xfs_ino_t
|
||||
|
|
|
|||
|
|
@ -95,13 +95,13 @@ static inline int xfs_dir2_sf_hdr_size(int i8count)
|
|||
static inline xfs_dir2_data_aoff_t
|
||||
xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep)
|
||||
{
|
||||
return INT_GET_UNALIGNED_16_BE(&(sfep)->offset.i);
|
||||
return get_unaligned_be16(&sfep->offset.i);
|
||||
}
|
||||
|
||||
static inline void
|
||||
xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep, xfs_dir2_data_aoff_t off)
|
||||
{
|
||||
INT_SET_UNALIGNED_16_BE(&(sfep)->offset.i, off);
|
||||
put_unaligned_be16(off, &sfep->offset.i);
|
||||
}
|
||||
|
||||
static inline int
|
||||
|
|
|
|||
Loading…
Reference in New Issue