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[XFS] xlog_rec_header/xlog_rec_ext_header endianess annotations

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Mostly trivial conversion with one exceptions: h_num_logops was kept in
native endian previously and only converted to big endian in xlog_sync,
but we always keep it big endian now. With todays cpus fast byteswap
instructions that's not an issue but the new variant keeps the code clean
and maintainable.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:29821a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Christoph Hellwig
2007-10-12 10:59:34 +10:00
committed by Lachlan McIlroy
parent 67fcb7bfb6
commit b53e675dc8
4 changed files with 120 additions and 133 deletions
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40
fs/xfs/xfs_log_priv.h
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@@ -63,10 +63,10 @@ static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block)
static inline uint xlog_get_cycle(char *ptr)
{
if (INT_GET(*(uint *)ptr, ARCH_CONVERT) == XLOG_HEADER_MAGIC_NUM)
return INT_GET(*((uint *)ptr + 1), ARCH_CONVERT);
if (be32_to_cpu(*(__be32 *)ptr) == XLOG_HEADER_MAGIC_NUM)
return be32_to_cpu(*((__be32 *)ptr + 1));
else
return INT_GET(*(uint *)ptr, ARCH_CONVERT);
return be32_to_cpu(*(__be32 *)ptr);
}
#define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1)
@@ -85,9 +85,9 @@ static inline uint xlog_get_cycle(char *ptr)
*
* this has endian issues, of course.
*/
static inline uint xlog_get_client_id(uint i)
static inline uint xlog_get_client_id(__be32 i)
{
return INT_GET(i, ARCH_CONVERT) >> 24;
return be32_to_cpu(i) >> 24;
}
#define xlog_panic(args...) cmn_err(CE_PANIC, ## args)
@@ -287,25 +287,25 @@ typedef struct xlog_op_header {
#endif
typedef struct xlog_rec_header {
uint h_magicno; /* log record (LR) identifier : 4 */
uint h_cycle; /* write cycle of log : 4 */
int h_version; /* LR version : 4 */
int h_len; /* len in bytes; should be 64-bit aligned: 4 */
xfs_lsn_t h_lsn; /* lsn of this LR : 8 */
xfs_lsn_t h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */
uint h_chksum; /* may not be used; non-zero if used : 4 */
int h_prev_block; /* block number to previous LR : 4 */
int h_num_logops; /* number of log operations in this LR : 4 */
uint h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE];
__be32 h_magicno; /* log record (LR) identifier : 4 */
__be32 h_cycle; /* write cycle of log : 4 */
__be32 h_version; /* LR version : 4 */
__be32 h_len; /* len in bytes; should be 64-bit aligned: 4 */
__be64 h_lsn; /* lsn of this LR : 8 */
__be64 h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */
__be32 h_chksum; /* may not be used; non-zero if used : 4 */
__be32 h_prev_block; /* block number to previous LR : 4 */
__be32 h_num_logops; /* number of log operations in this LR : 4 */
__be32 h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE];
/* new fields */
int h_fmt; /* format of log record : 4 */
uuid_t h_fs_uuid; /* uuid of FS : 16 */
int h_size; /* iclog size : 4 */
__be32 h_fmt; /* format of log record : 4 */
uuid_t h_fs_uuid; /* uuid of FS : 16 */
__be32 h_size; /* iclog size : 4 */
} xlog_rec_header_t;
typedef struct xlog_rec_ext_header {
uint xh_cycle; /* write cycle of log : 4 */
uint xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /* : 256 */
__be32 xh_cycle; /* write cycle of log : 4 */
__be32 xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /* : 256 */
} xlog_rec_ext_header_t;
#ifdef __KERNEL__