From 8f8181757771f252106efe2d6e833aabf0b64d01 Mon Sep 17 00:00:00 2001 From: Alberto Garcia Date: Mon, 5 Feb 2018 16:33:14 +0200 Subject: qcow2: Add offset_to_l2_slice_index() Similar to offset_to_l2_index(), this function takes a guest offset and returns the index in the L2 slice that contains its L2 entry. An L2 slice has currently the same size as an L2 table (one cluster), so both functions return the same value for now. Signed-off-by: Alberto Garcia Reviewed-by: Eric Blake Reviewed-by: Max Reitz Message-id: a1c45c5c5a76146dd1712d8d1e7b409ad539c718.1517840877.git.berto@igalia.com Signed-off-by: Max Reitz --- block/qcow2.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'block/qcow2.h') diff --git a/block/qcow2.h b/block/qcow2.h index 45fb7f4299..d956a6cdd2 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -474,6 +474,11 @@ static inline int offset_to_l2_index(BDRVQcow2State *s, int64_t offset) return (offset >> s->cluster_bits) & (s->l2_size - 1); } +static inline int offset_to_l2_slice_index(BDRVQcow2State *s, int64_t offset) +{ + return (offset >> s->cluster_bits) & (s->l2_slice_size - 1); +} + static inline int64_t align_offset(int64_t offset, int n) { offset = (offset + n - 1) & ~(n - 1); -- cgit v1.2.3