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-rw-r--r--fs/nilfs2/recovery.c75
1 files changed, 31 insertions, 44 deletions
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index 6dc83591d118..017bedc761a0 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -39,7 +39,6 @@ enum {
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 @@ static int nilfs_warn_segment_error(int err)
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 @@ int nilfs_read_super_root_block(struct super_block *sb, sector_t sr_block,
* @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 @@ load_segment_summary(struct nilfs_sb_info *sbi, sector_t pseg_start,
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 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
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;
@@ -770,14 +751,8 @@ int nilfs_recover_logical_segments(struct the_nilfs *nilfs,
nilfs_finish_roll_forward(nilfs, sbi, ri);
}
- nilfs_detach_checkpoint(sbi);
- return 0;
-
failed:
nilfs_detach_checkpoint(sbi);
- nilfs_mdt_clear(nilfs->ns_cpfile);
- nilfs_mdt_clear(nilfs->ns_sufile);
- nilfs_mdt_clear(nilfs->ns_dat);
return err;
}
@@ -804,6 +779,7 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
struct nilfs_segsum_info ssi;
sector_t pseg_start, pseg_end, sr_pseg_start = 0;
sector_t seg_start, seg_end; /* range of full segment (block number) */
+ sector_t b, end;
u64 seg_seq;
__u64 segnum, nextnum = 0;
__u64 cno;
@@ -819,9 +795,14 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
/* Calculate range of segment */
nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);
+ /* Read ahead segment */
+ b = seg_start;
+ while (b <= seg_end)
+ sb_breadahead(sbi->s_super, b++);
+
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;
@@ -841,14 +822,20 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
ri->ri_nextnum = nextnum;
empty_seg = 0;
+ if (!NILFS_SEG_HAS_SR(&ssi) && !scan_newer) {
+ /* This will never happen because a superblock
+ (last_segment) always points to a pseg
+ having a super root. */
+ ret = NILFS_SEG_FAIL_CONSISTENCY;
+ goto failed;
+ }
+
+ if (pseg_start == seg_start) {
+ nilfs_get_segment_range(nilfs, nextnum, &b, &end);
+ while (b <= end)
+ sb_breadahead(sbi->s_super, b++);
+ }
if (!NILFS_SEG_HAS_SR(&ssi)) {
- if (!scan_newer) {
- /* This will never happen because a superblock
- (last_segment) always points to a pseg
- having a super root. */
- ret = NILFS_SEG_FAIL_CONSISTENCY;
- goto failed;
- }
if (!ri->ri_lsegs_start && NILFS_SEG_LOGBGN(&ssi)) {
ri->ri_lsegs_start = pseg_start;
ri->ri_lsegs_start_seq = seg_seq;
@@ -919,7 +906,7 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
super_root_found:
/* Updating pointers relating to the latest checkpoint */
- list_splice(&segments, ri->ri_used_segments.prev);
+ list_splice_tail(&segments, &ri->ri_used_segments);
nilfs->ns_last_pseg = sr_pseg_start;
nilfs->ns_last_seq = nilfs->ns_seg_seq;
nilfs->ns_last_cno = ri->ri_cno;
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-04-27 04:58:52 +0200