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From: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com,
	armbru@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com,
	andrey.shinkevich@virtuozzo.com, den@openvz.org,
	mreitz@redhat.com, jsnow@redhat.com
Subject: [PATCH v4 10/15] copy-on-read: Support change filename functions
Date: Tue, 12 May 2020 19:50:40 +0300	[thread overview]
Message-ID: <1589302245-893269-11-git-send-email-andrey.shinkevich@virtuozzo.com> (raw)
In-Reply-To: <1589302245-893269-1-git-send-email-andrey.shinkevich@virtuozzo.com>

The COR-filter driver should support a redirecting function to refresh
filenames. Otherwise, a file name of the filter will be copied
instead of the one of a data node. It is also true for the function
bdrv_change_backing_file().

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
---
 block/copy-on-read.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index c4fa468..74e01ee 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -21,6 +21,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/cutils.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
 
@@ -128,6 +129,21 @@ static void cor_lock_medium(BlockDriverState *bs, bool locked)
 }
 
 
+static void cor_refresh_filename(BlockDriverState *bs)
+{
+    pstrcpy(bs->exact_filename, sizeof(bs->exact_filename),
+            bs->file->bs->filename);
+}
+
+
+static int cor_change_backing_file(BlockDriverState *bs,
+                                   const char *backing_file,
+                                   const char *backing_fmt)
+{
+    return bdrv_change_backing_file(bs->file->bs, backing_file, backing_fmt);
+}
+
+
 static BlockDriver bdrv_copy_on_read = {
     .format_name                        = "copy-on-read",
 
@@ -146,6 +162,8 @@ static BlockDriver bdrv_copy_on_read = {
     .bdrv_lock_medium                   = cor_lock_medium,
 
     .bdrv_co_block_status               = bdrv_co_block_status_from_file,
+    .bdrv_refresh_filename              = cor_refresh_filename,
+    .bdrv_change_backing_file           = cor_change_backing_file,
 
     .has_variable_length                = true,
     .is_filter                          = true,
-- 
1.8.3.1



  parent reply	other threads:[~2020-05-12 16:58 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-12 16:50 [PATCH v4 00/15] Apply COR-filter to the block-stream permanently Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 01/15] block: Mark commit and mirror as filter drivers Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 02/15] copy-on-read: Support compressed writes Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 03/15] block: Add child access functions Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 04/15] block: Add chain helper functions Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 05/15] block: Include filters when freezing backing chain Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 06/15] block: Use CAFs in block status functions Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 07/15] commit: Deal with filters when blocking intermediate nodes Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 08/15] block: Use CAFs when working with backing chains Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 09/15] block: prepare block-stream for using COR-filter Andrey Shinkevich
2020-05-12 16:50 ` Andrey Shinkevich [this message]
2020-05-12 16:50 ` [PATCH v4 11/15] copy-on-read: Support preadv/pwritev_part functions Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 12/15] copy-on-read: add filter append/drop functions Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 13/15] qapi: add filter-node-name to block-stream Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 14/15] iotests: prepare 245 for using filter in block-stream Andrey Shinkevich
2020-05-12 16:50 ` [PATCH v4 15/15] block: apply COR-filter to block-stream jobs Andrey Shinkevich
2020-05-12 17:56 ` [PATCH v4 00/15] Apply COR-filter to the block-stream permanently Vladimir Sementsov-Ogievskiy
2020-05-13 14:06   ` Vladimir Sementsov-Ogievskiy
2020-05-13  0:09 ` no-reply
2020-05-13  0:13 ` no-reply
2020-05-13  0:15 ` no-reply

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