[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[RFC PATCH v3 08/27] qcow2: Add offset_to_sc_index()
From: |
Alberto Garcia |
Subject: |
[RFC PATCH v3 08/27] qcow2: Add offset_to_sc_index() |
Date: |
Sun, 22 Dec 2019 12:36:49 +0100 |
For a given offset, return the subcluster number within its cluster
(i.e. with 32 subclusters per cluster it returns a number between 0
and 31).
Signed-off-by: Alberto Garcia <address@hidden>
---
block/qcow2.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block/qcow2.h b/block/qcow2.h
index 941330cfc9..523bc489a5 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -566,6 +566,11 @@ 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 int offset_to_sc_index(BDRVQcow2State *s, int64_t offset)
+{
+ return (offset >> s->subcluster_bits) & (s->subclusters_per_cluster - 1);
+}
+
static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s)
{
return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);
--
2.20.1
- [RFC PATCH v3 01/27] qcow2: Add calculate_l2_meta(), (continued)
- [RFC PATCH v3 01/27] qcow2: Add calculate_l2_meta(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 24/27] qcow2: Restrict qcow2_co_pwrite_zeroes() to full clusters only, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 11/27] qcow2: Add QCow2SubclusterType and qcow2_get_subcluster_type(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 07/27] qcow2: Add subcluster-related fields to BDRVQcow2State, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 18/27] qcow2: Add subcluster support to check_refcounts_l2(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 27/27] iotests: Add tests for qcow2 images with extended L2 entries, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 17/27] qcow2: Add subcluster support to discard_in_l2_slice(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 10/27] qcow2: Update get/set_l2_entry() and add get/set_l2_bitmap(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 03/27] qcow2: Process QCOW2_CLUSTER_ZERO_ALLOC clusters in handle_copied(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 22/27] qcow2: Clear the L2 bitmap when allocating a compressed cluster, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 08/27] qcow2: Add offset_to_sc_index(),
Alberto Garcia <=
- [RFC PATCH v3 19/27] qcow2: Add subcluster support to expand_zero_clusters_in_l1(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 21/27] qcow2: Update L2 bitmap in qcow2_alloc_cluster_link_l2(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 06/27] qcow2: Add dummy has_subclusters() function, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 02/27] qcow2: Split cluster_needs_cow() out of count_cow_clusters(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 13/27] qcow2: Handle QCOW2_SUBCLUSTER_UNALLOCATED_ALLOC, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 15/27] qcow2: Add subcluster support to qcow2_get_cluster_offset(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 20/27] qcow2: Fix offset calculation in handle_dependencies(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 23/27] qcow2: Add subcluster support to handle_alloc_space(), Alberto Garcia, 2019/12/22
- [RFC PATCH v3 05/27] qcow2: Document the Extended L2 Entries feature, Alberto Garcia, 2019/12/22
- [RFC PATCH v3 09/27] qcow2: Add l2_entry_size(), Alberto Garcia, 2019/12/22