[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v4 10/30] qcow2: Add offset_to_sc_index()
From: |
Alberto Garcia |
Subject: |
[PATCH v4 10/30] qcow2: Add offset_to_sc_index() |
Date: |
Tue, 17 Mar 2020 19:16:07 +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>
Reviewed-by: Max Reitz <address@hidden>
---
block/qcow2.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block/qcow2.h b/block/qcow2.h
index 3052b14dc0..06929072d2 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
- [PATCH v4 00/30] Add subcluster allocation to qcow2, Alberto Garcia, 2020/03/17
- [PATCH v4 12/30] qcow2: Update get/set_l2_entry() and add get/set_l2_bitmap(), Alberto Garcia, 2020/03/17
- [PATCH v4 22/30] qcow2: Fix offset calculation in handle_dependencies(), Alberto Garcia, 2020/03/17
- [PATCH v4 10/30] qcow2: Add offset_to_sc_index(),
Alberto Garcia <=
- [PATCH v4 16/30] qcow2: Handle QCOW2_SUBCLUSTER_UNALLOCATED_ALLOC, Alberto Garcia, 2020/03/17
- [PATCH v4 29/30] qcow2: Add subcluster support to qcow2_measure(), Alberto Garcia, 2020/03/17
- [PATCH v4 18/30] qcow2: Add subcluster support to qcow2_get_host_offset(), Alberto Garcia, 2020/03/17
- [PATCH v4 06/30] qcow2: Add get_l2_entry() and set_l2_entry(), Alberto Garcia, 2020/03/17
- [PATCH v4 05/30] qcow2: Process QCOW2_CLUSTER_ZERO_ALLOC clusters in handle_copied(), Alberto Garcia, 2020/03/17
- [PATCH v4 11/30] qcow2: Add l2_entry_size(), Alberto Garcia, 2020/03/17
- [PATCH v4 02/30] qcow2: Convert qcow2_get_cluster_offset() into qcow2_get_host_offset(), Alberto Garcia, 2020/03/17
- [PATCH v4 15/30] qcow2: Replace QCOW2_CLUSTER_* with QCOW2_SUBCLUSTER_*, Alberto Garcia, 2020/03/17
- [PATCH v4 21/30] qcow2: Add subcluster support to check_refcounts_l2(), Alberto Garcia, 2020/03/17