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-rw-r--r--fs/bcachefs/keylist.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/bcachefs/keylist.c b/fs/bcachefs/keylist.c
new file mode 100644
index 0000000000..5699cd4873
--- /dev/null
+++ b/fs/bcachefs/keylist.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bcachefs.h"
+#include "bkey.h"
+#include "keylist.h"
+
+int bch2_keylist_realloc(struct keylist *l, u64 *inline_u64s,
+ size_t nr_inline_u64s, size_t new_u64s)
+{
+ size_t oldsize = bch2_keylist_u64s(l);
+ size_t newsize = oldsize + new_u64s;
+ u64 *old_buf = l->keys_p == inline_u64s ? NULL : l->keys_p;
+ u64 *new_keys;
+
+ newsize = roundup_pow_of_two(newsize);
+
+ if (newsize <= nr_inline_u64s ||
+ (old_buf && roundup_pow_of_two(oldsize) == newsize))
+ return 0;
+
+ new_keys = krealloc(old_buf, sizeof(u64) * newsize, GFP_NOFS);
+ if (!new_keys)
+ return -ENOMEM;
+
+ if (!old_buf)
+ memcpy_u64s(new_keys, inline_u64s, oldsize);
+
+ l->keys_p = new_keys;
+ l->top_p = new_keys + oldsize;
+
+ return 0;
+}
+
+void bch2_keylist_pop_front(struct keylist *l)
+{
+ l->top_p -= bch2_keylist_front(l)->k.u64s;
+
+ memmove_u64s_down(l->keys,
+ bkey_next(l->keys),
+ bch2_keylist_u64s(l));
+}
+
+#ifdef CONFIG_BCACHEFS_DEBUG
+void bch2_verify_keylist_sorted(struct keylist *l)
+{
+ struct bkey_i *k;
+
+ for_each_keylist_key(l, k)
+ BUG_ON(bkey_next(k) != l->top &&
+ bpos_ge(k->k.p, bkey_next(k)->k.p));
+}
+#endif