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[PULL 11/18] parallels: Add data_off repairing to parallels_open()
From: |
Denis V. Lunev |
Subject: |
[PULL 11/18] parallels: Add data_off repairing to parallels_open() |
Date: |
Wed, 6 Sep 2023 17:54:06 +0200 |
From: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
Place data_start/data_end calculation after reading the image header
to s->header. Set s->data_start to the offset calculated in
parallels_test_data_off(). Call bdrv_check() if data_off is incorrect.
Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Denis V. Lunev <den@openvz.org>
---
block/parallels.c | 29 ++++++++++++++++-------------
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/block/parallels.c b/block/parallels.c
index 103acb7b40..48c32d6821 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -1032,9 +1032,11 @@ static int parallels_open(BlockDriverState *bs, QDict
*options, int flags,
ParallelsHeader ph;
int ret, size, i;
int64_t file_nb_sectors, sector;
+ uint32_t data_start;
QemuOpts *opts = NULL;
Error *local_err = NULL;
char *buf;
+ bool data_off_is_correct;
ret = bdrv_open_file_child(NULL, options, "file", bs, errp);
if (ret < 0) {
@@ -1092,18 +1094,6 @@ static int parallels_open(BlockDriverState *bs, QDict
*options, int flags,
ret = -ENOMEM;
goto fail;
}
- s->data_start = le32_to_cpu(ph.data_off);
- if (s->data_start == 0) {
- s->data_start = DIV_ROUND_UP(size, BDRV_SECTOR_SIZE);
- }
- s->data_end = s->data_start;
- if (s->data_end < (s->header_size >> BDRV_SECTOR_BITS)) {
- /*
- * There is not enough unused space to fit to block align between BAT
- * and actual data. We can't avoid read-modify-write...
- */
- s->header_size = size;
- }
ret = bdrv_pread(bs->file, 0, s->header_size, s->header, 0);
if (ret < 0) {
@@ -1115,6 +1105,18 @@ static int parallels_open(BlockDriverState *bs, QDict
*options, int flags,
s->header_unclean = true;
}
+ data_off_is_correct = parallels_test_data_off(s, file_nb_sectors,
+ &data_start);
+ s->data_start = data_start;
+ s->data_end = s->data_start;
+ if (s->data_end < (s->header_size >> BDRV_SECTOR_BITS)) {
+ /*
+ * There is not enough unused space to fit to block align between BAT
+ * and actual data. We can't avoid read-modify-write...
+ */
+ s->header_size = size;
+ }
+
opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, errp);
if (!opts) {
goto fail_options;
@@ -1197,7 +1199,8 @@ static int parallels_open(BlockDriverState *bs, QDict
*options, int flags,
* Repair the image if it's dirty or
* out-of-image corruption was detected.
*/
- if (s->data_end > file_nb_sectors || s->header_unclean) {
+ if (s->data_end > file_nb_sectors || s->header_unclean
+ || !data_off_is_correct) {
BdrvCheckResult res;
ret = bdrv_check(bs, &res, BDRV_FIX_ERRORS | BDRV_FIX_LEAKS);
if (ret < 0) {
--
2.34.1
- [PULL 05/18] parallels: Add "explicit" argument to parallels_check_leak(), (continued)
- [PULL 05/18] parallels: Add "explicit" argument to parallels_check_leak(), Denis V. Lunev, 2023/09/06
- [PULL 02/18] parallels: Fix comments formatting inside parallels driver, Denis V. Lunev, 2023/09/06
- [PULL 09/18] parallels: Use bdrv_co_getlength() in parallels_check_outside_image(), Denis V. Lunev, 2023/09/06
- [PULL 03/18] parallels: Incorrect data end calculation in parallels_open(), Denis V. Lunev, 2023/09/06
- [PULL 01/18] MAINTAINERS: add tree to keep parallels format driver changes, Denis V. Lunev, 2023/09/06
- [PULL 06/18] parallels: Add data_start field to BDRVParallelsState, Denis V. Lunev, 2023/09/06
- [PULL 08/18] parallels: Image repairing in parallels_open(), Denis V. Lunev, 2023/09/06
- [PULL 07/18] parallels: Add checking and repairing duplicate offsets in BAT, Denis V. Lunev, 2023/09/06
- [PULL 10/18] parallels: Add data_off check, Denis V. Lunev, 2023/09/06
- [PULL 15/18] iotests: Refactor tests of parallels images checks (131), Denis V. Lunev, 2023/09/06
- [PULL 11/18] parallels: Add data_off repairing to parallels_open(),
Denis V. Lunev <=
- [PULL 12/18] iotests: Add out-of-image check test for parallels format, Denis V. Lunev, 2023/09/06
- [PULL 13/18] iotests: Add leak check test for parallels format, Denis V. Lunev, 2023/09/06
- [PULL 17/18] iotests: Fix test 131 after repair was added to parallels_open(), Denis V. Lunev, 2023/09/06
- [PULL 18/18] iotests: Add test for data_off check, Denis V. Lunev, 2023/09/06
- [PULL 14/18] iotests: Add test for BAT entries duplication check, Denis V. Lunev, 2023/09/06
- [PULL 16/18] iotests: Fix cluster size in parallels images tests (131), Denis V. Lunev, 2023/09/06
- Re: [PULL 00/18] Parallels format driver, Stefan Hajnoczi, 2023/09/07