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bcachefs: Improve error messages in superblock write path

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Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet
2022-01-01 19:04:33 -05:00
committed by Kent Overstreet
parent 2a84de3360
commit bf15946316
1 changed files with 17 additions and 4 deletions
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21
fs/bcachefs/super-io.c
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@@ -754,11 +754,24 @@ int bch2_write_super(struct bch_fs *c)
closure_sync(cl);
for_each_online_member(ca, c, i) {
if (!ca->sb_write_error &&
ca->disk_sb.seq !=
le64_to_cpu(ca->sb_read_scratch->seq)) {
if (ca->sb_write_error)
continue;
if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) {
bch2_fs_fatal_error(c,
"Superblock modified by another process");
"Superblock write was silently dropped! (seq %llu expected %llu)",
le64_to_cpu(ca->sb_read_scratch->seq),
ca->disk_sb.seq);
percpu_ref_put(&ca->io_ref);
ret = -EROFS;
goto out;
}
if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) {
bch2_fs_fatal_error(c,
"Superblock modified by another process (seq %llu expected %llu)",
le64_to_cpu(ca->sb_read_scratch->seq),
ca->disk_sb.seq);
percpu_ref_put(&ca->io_ref);
ret = -EROFS;
goto out;