Merge tag 'bcachefs-2024-07-22' of https://evilpiepirate.org/git/bcachefs

Pull bcachefs fixes from Kent Overstreet:

 - another fix for fsck getting stuck, from marcin

 - small syzbot fix

 - another undefined shift fix

* tag 'bcachefs-2024-07-22' of https://evilpiepirate.org/git/bcachefs:
  bcachefs: Fix printbuf usage while atomic
  bcachefs: More informative error message in reattach_inode()
  bcachefs: kill btree_trans_too_many_iters() in bch2_bucket_alloc_freelist()
  bcachefs: mean_and_variance: Avoid too-large shift amounts

fs/bcachefs/alloc_foreground.c

@@ -496,12 +496,6 @@ static struct open_bucket *bch2_bucket_alloc_freelist(struct btree_trans *trans,
 		for (alloc_cursor = max(alloc_cursor, bkey_start_offset(k.k));
 		     alloc_cursor < k.k->p.offset;
 		     alloc_cursor++) {
-			ret = btree_trans_too_many_iters(trans);
-			if (ret) {
-				ob = ERR_PTR(ret);
-				break;
-			}
-
 			s->buckets_seen++;
 
 			u64 bucket = alloc_cursor & ~(~0ULL << 56);

fs/bcachefs/fsck.c

@@ -283,6 +283,7 @@ static int reattach_inode(struct btree_trans *trans,
 			  struct bch_inode_unpacked *inode,
 			  u32 inode_snapshot)
 {
+	struct bch_fs *c = trans->c;
 	struct bch_hash_info dir_hash;
 	struct bch_inode_unpacked lostfound;
 	char name_buf[20];
@@ -317,7 +318,7 @@ static int reattach_inode(struct btree_trans *trans,
 			return ret;
 	}
 
-	dir_hash = bch2_hash_info_init(trans->c, &lostfound);
+	dir_hash = bch2_hash_info_init(c, &lostfound);
 
 	name = (struct qstr) QSTR(name_buf);
 
@@ -330,8 +331,10 @@ static int reattach_inode(struct btree_trans *trans,
 				inode->bi_subvol ?: inode->bi_inum,
 				&dir_offset,
 				STR_HASH_must_create);
-	if (ret)
+	if (ret) {
+		bch_err_msg(c, ret, "error creating dirent");
 		return ret;
+	}
 
 	inode->bi_dir		= lostfound.bi_inum;
 	inode->bi_dir_offset	= dir_offset;

fs/bcachefs/journal_reclaim.c

@@ -206,6 +206,7 @@ void bch2_journal_space_available(struct journal *j)
 
 	if (nr_online < metadata_replicas_required(c)) {
 		struct printbuf buf = PRINTBUF;
+		buf.atomic++;
 		prt_printf(&buf, "insufficient writeable journal devices available: have %u, need %u\n"
 			   "rw journal devs:", nr_online, metadata_replicas_required(c));
 

fs/bcachefs/mean_and_variance.h

@@ -111,11 +111,11 @@ static inline u128_u u128_shl(u128_u i, s8 shift)
 {
 	u128_u r;
 
-	r.lo = i.lo << shift;
+	r.lo = i.lo << (shift & 63);
 	if (shift < 64)
-		r.hi = (i.hi << shift) | (i.lo >> (64 - shift));
+		r.hi = (i.hi << (shift & 63)) | (i.lo >> (-shift & 63));
 	else {
-		r.hi = i.lo << (shift - 64);
+		r.hi = i.lo << (-shift & 63);
 		r.lo = 0;
 	}
 	return r;