nilfs2: delete unnecessary condition in load_segment_summary
This is a trivial patch to remove unnecessary condition.
load_segment_summary() checks crc of segment_summary OR crc of whole
log data blocks based on boolean argument full_check. However,
callers of the function pass only 1 as full_check, which means only
whole log data blocks checking code is running all the time.
This patch deletes the condition and full_check argument and also
deletes enum 'NILFS_SEG_FAIL_CHECKSUM_SEGSUM' and corresponding case
clause, for it is nolonger used anymore.
Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index c9c96c7..017bedc 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -39,7 +39,6 @@
NILFS_SEG_FAIL_IO,
NILFS_SEG_FAIL_MAGIC,
NILFS_SEG_FAIL_SEQ,
- NILFS_SEG_FAIL_CHECKSUM_SEGSUM,
NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT,
NILFS_SEG_FAIL_CHECKSUM_FULL,
NILFS_SEG_FAIL_CONSISTENCY,
@@ -71,10 +70,6 @@
printk(KERN_WARNING
"NILFS warning: Sequence number mismatch\n");
break;
- case NILFS_SEG_FAIL_CHECKSUM_SEGSUM:
- printk(KERN_WARNING
- "NILFS warning: Checksum error in segment summary\n");
- break;
case NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT:
printk(KERN_WARNING
"NILFS warning: Checksum error in super root\n");
@@ -206,19 +201,15 @@
* @pseg_start: start disk block number of partial segment
* @seg_seq: sequence number requested
* @ssi: pointer to nilfs_segsum_info struct to store information
- * @full_check: full check flag
- * (0: only checks segment summary CRC, 1: data CRC)
*/
static int
load_segment_summary(struct nilfs_sb_info *sbi, sector_t pseg_start,
- u64 seg_seq, struct nilfs_segsum_info *ssi,
- int full_check)
+ u64 seg_seq, struct nilfs_segsum_info *ssi)
{
struct buffer_head *bh_sum;
struct nilfs_segment_summary *sum;
- unsigned long offset, nblock;
- u64 check_bytes;
- u32 crc, crc_sum;
+ unsigned long nblock;
+ u32 crc;
int ret = NILFS_SEG_FAIL_IO;
bh_sum = sb_bread(sbi->s_super, pseg_start);
@@ -237,34 +228,24 @@
ret = NILFS_SEG_FAIL_SEQ;
goto failed;
}
- if (full_check) {
- offset = sizeof(sum->ss_datasum);
- check_bytes =
- ((u64)ssi->nblocks << sbi->s_super->s_blocksize_bits);
- nblock = ssi->nblocks;
- crc_sum = le32_to_cpu(sum->ss_datasum);
- ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
- } else { /* only checks segment summary */
- offset = sizeof(sum->ss_datasum) + sizeof(sum->ss_sumsum);
- check_bytes = ssi->sumbytes;
- nblock = ssi->nsumblk;
- crc_sum = le32_to_cpu(sum->ss_sumsum);
- ret = NILFS_SEG_FAIL_CHECKSUM_SEGSUM;
- }
+ nblock = ssi->nblocks;
if (unlikely(nblock == 0 ||
nblock > sbi->s_nilfs->ns_blocks_per_segment)) {
/* This limits the number of blocks read in the CRC check */
ret = NILFS_SEG_FAIL_CONSISTENCY;
goto failed;
}
- if (calc_crc_cont(sbi, bh_sum, &crc, offset, check_bytes,
+ if (calc_crc_cont(sbi, bh_sum, &crc, sizeof(sum->ss_datasum),
+ ((u64)nblock << sbi->s_super->s_blocksize_bits),
pseg_start, nblock)) {
ret = NILFS_SEG_FAIL_IO;
goto failed;
}
- if (crc == crc_sum)
+ if (crc == le32_to_cpu(sum->ss_datasum))
ret = 0;
+ else
+ ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
failed:
brelse(bh_sum);
out:
@@ -598,7 +579,7 @@
while (segnum != ri->ri_segnum || pseg_start <= ri->ri_pseg_start) {
- ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi, 1);
+ ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi);
if (ret) {
if (ret == NILFS_SEG_FAIL_IO) {
err = -EIO;
@@ -821,7 +802,7 @@
for (;;) {
/* Load segment summary */
- ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi, 1);
+ ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi);
if (ret) {
if (ret == NILFS_SEG_FAIL_IO)
goto failed;