bcachefs: Add private error codes for ENOSPC

Continuing the saga of introducing private dedicated error codes for
each error path, this patch converts ENOSPC to error codes that are
subtypes of ENOSPC. We've recently had a test failure where we got
-ENOSPC where we shouldn't have, and didn't have enough information to
tell where it came from, so this patch will solve that problem.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 8 insertions, 5 deletions

diff --git a/fs/bcachefs/journal.c b/fs/bcachefs/journal.c
index 9961cc674ad7..97c1ecb65dbd 100644
--- a/fs/bcachefs/journal.c
+++ b/fs/bcachefs/journal.c
@@ -808,14 +808,16 @@ static int __bch2_set_nr_journal_buckets(struct bch_dev *ca, unsigned nr,
 		if (new_fs) {
 			bu[nr_got] = bch2_bucket_alloc_new_fs(ca);
 			if (bu[nr_got] < 0) {
-				ret = -ENOSPC;
+				ret = -BCH_ERR_ENOSPC_bucket_alloc;
 				break;
 			}
 		} else {
 			ob[nr_got] = bch2_bucket_alloc(c, ca, RESERVE_none,
 					       false, cl);
 			if (IS_ERR(ob[nr_got])) {
-				ret = cl ? -EAGAIN : -ENOSPC;
+				ret = cl
+					? -EAGAIN
+					: -BCH_ERR_ENOSPC_bucket_alloc;
 				break;
 			}
 
@@ -942,10 +944,11 @@ int bch2_set_nr_journal_buckets(struct bch_fs *c, struct bch_dev *ca,
 		 * reservation to ensure we'll actually be able to allocate:
 		 */
 
-		if (bch2_disk_reservation_get(c, &disk_res,
-					      bucket_to_sector(ca, nr - ja->nr), 1, 0)) {
+		ret = bch2_disk_reservation_get(c, &disk_res,
+						bucket_to_sector(ca, nr - ja->nr), 1, 0);
+		if (ret) {
 			mutex_unlock(&c->sb_lock);
-			return -ENOSPC;
+			return ret;
 		}
 
 		ret = __bch2_set_nr_journal_buckets(ca, nr, false, &cl);