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bcachefs: Improve checksum error messages

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We're seeing checksum errors in the bch2_rechecksum_bio() path - give it
a better error message to help track this down.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-06-18 19:03:25 -04:00 committed by Kent Overstreet
parent 50b13beef0
commit 23189da9eb
2 changed files with 13 additions and 5 deletions
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11
fs/bcachefs/checksum.c
View file

@ -425,8 +425,17 @@ int bch2_rechecksum_bio(struct bch_fs *c, struct bio *bio,
merged = bch2_checksum_bio(c, crc_old.csum_type,
extent_nonce(version, crc_old), bio);
if (bch2_crc_cmp(merged, crc_old.csum))
if (bch2_crc_cmp(merged, crc_old.csum)) {
bch_err(c, "checksum error in bch2_rechecksum_bio() (memory corruption or bug?)\n"
"expected %0llx:%0llx got %0llx:%0llx (old type %s new type %s)",
crc_old.csum.hi,
crc_old.csum.lo,
merged.hi,
merged.lo,
bch2_csum_types[crc_old.csum_type],
bch2_csum_types[new_csum_type]);
return -EIO;
}
for (i = splits; i < splits + ARRAY_SIZE(splits); i++) {
if (i->crc)

7
fs/bcachefs/io.c
View file

@ -1186,8 +1186,7 @@ static int bch2_write_extent(struct bch_write_op *op, struct write_point *wp,
*_dst = dst;
return more;
csum_err:
bch_err(c, "error verifying existing checksum while "
"rewriting existing data (memory corruption?)");
bch_err(c, "error verifying existing checksum while rewriting existing data (memory corruption?)");
ret = -EIO;
err:
if (to_wbio(dst)->bounce)
@ -1977,9 +1976,9 @@ static void __bch2_read_endio(struct work_struct *work)
}
bch2_dev_inum_io_error(ca, rbio->read_pos.inode, (u64) rbio->bvec_iter.bi_sector,
"data checksum error: expected %0llx:%0llx got %0llx:%0llx (type %u)",
"data checksum error: expected %0llx:%0llx got %0llx:%0llx (type %s)",
rbio->pick.crc.csum.hi, rbio->pick.crc.csum.lo,
csum.hi, csum.lo, crc.csum_type);
csum.hi, csum.lo, bch2_csum_types[crc.csum_type]);
bch2_rbio_error(rbio, READ_RETRY_AVOID, BLK_STS_IOERR);
goto out;
decompression_err: