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[Qemu-block] [PULL 19/37] specs/qcow2: Clarify that compressed clusters
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PULL 19/37] specs/qcow2: Clarify that compressed clusters have the COPIED bit reset |
Date: |
Tue, 15 May 2018 17:40:15 +0200 |
From: Alberto Garcia <address@hidden>
Compressed clusters are not supposed to have the COPIED bit set, but
this is not made explicit in the specs, so let's document it.
Signed-off-by: Alberto Garcia <address@hidden>
Message-id: address@hidden
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Max Reitz <address@hidden>
---
docs/interop/qcow2.txt | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/docs/interop/qcow2.txt b/docs/interop/qcow2.txt
index feb711fb6a..8e1547ded2 100644
--- a/docs/interop/qcow2.txt
+++ b/docs/interop/qcow2.txt
@@ -400,10 +400,10 @@ L2 table entry:
62: 0 for standard clusters
1 for compressed clusters
- 63: 0 for a cluster that is unused or requires COW, 1 if its
- refcount is exactly one. This information is only accurate
- in L2 tables that are reachable from the active L1
- table.
+ 63: 0 for clusters that are unused, compressed or require COW.
+ 1 for standard clusters whose refcount is exactly one.
+ This information is only accurate in L2 tables
+ that are reachable from the active L1 table.
Standard Cluster Descriptor:
--
2.13.6
- [Qemu-block] [PULL 06/37] vxhs: Switch to byte-based callbacks, (continued)
- [Qemu-block] [PULL 06/37] vxhs: Switch to byte-based callbacks, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 07/37] block: Drop last of the sector-based aio callbacks, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 08/37] block: Merge .bdrv_co_writev{, _flags} in drivers, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 09/37] hmp: Allow using a qdev id in block_set_io_throttle, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 01/37] block-backend: simplify blk_get_aio_context, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 10/37] blockjob: expose error string via query, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 15/37] blockjob: Introduce block_job_ratelimit_get_delay(), Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 11/37] blockjob: Fix assertion in block_job_finalize(), Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 16/37] blockjob: Add block_job_driver(), Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 14/37] blockjob: Implement block_job_set_speed() centrally, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 19/37] specs/qcow2: Clarify that compressed clusters have the COPIED bit reset,
Kevin Wolf <=
- [Qemu-block] [PULL 13/37] blockjob: Move RateLimit to BlockJob, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 12/37] blockjob: Wrappers for progress counter access, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 17/37] iotests: Split 214 off of 122, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 22/37] iotests: Add failure matching to common.qemu, Kevin Wolf, 2018/05/15
- [Qemu-block] [PULL 20/37] qcow2: Give the refcount cache the minimum possible size by default, Kevin Wolf, 2018/05/15