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block: add bdrv_co_delete_file_noerr

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This function wraps bdrv_co_delete_file for the common case of removing a file,
which was just created by format driver, on an error condition.

It hides the -ENOTSUPP error, and reports all other errors otherwise.

Use it in luks driver

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20201217170904.946013-3-mlevitsk@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Maxim Levitsky 2020-12-17 19:09:03 +02:00 committed by Kevin Wolf
parent dcb6699512
commit a890f08e58
3 changed files with 25 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
block.c
View File

@ -706,6 +706,28 @@ int coroutine_fn bdrv_co_delete_file(BlockDriverState *bs, Error **errp)
return ret;
}
void coroutine_fn bdrv_co_delete_file_noerr(BlockDriverState *bs)
{
Error *local_err = NULL;
int ret;
if (!bs) {
return;
}
ret = bdrv_co_delete_file(bs, &local_err);
/*
* ENOTSUP will happen if the block driver doesn't support
* the 'bdrv_co_delete_file' interface. This is a predictable
* scenario and shouldn't be reported back to the user.
*/
if (ret == -ENOTSUP) {
error_free(local_err);
} else if (ret < 0) {
error_report_err(local_err);
}
}
/**
* Try to get @bs's logical and physical block size.
* On success, store them in @bsz struct and return 0.

15
block/crypto.c
View File

@ -725,19 +725,8 @@ fail:
* If an error occurred, delete 'filename'. Even if the file existed
* beforehand, it has been truncated and corrupted in the process.
*/
if (ret && bs) {
Error *local_delete_err = NULL;
int r_del = bdrv_co_delete_file(bs, &local_delete_err);
/*
* ENOTSUP will happen if the block driver doesn't support
* the 'bdrv_co_delete_file' interface. This is a predictable
* scenario and shouldn't be reported back to the user.
*/
if ((r_del < 0) && (r_del != -ENOTSUP)) {
error_report_err(local_delete_err);
} else {
error_free(local_delete_err);
}
if (ret) {
bdrv_co_delete_file_noerr(bs);
}
bdrv_unref(bs);

1
include/block/block.h
View File

@ -441,6 +441,7 @@ int bdrv_freeze_backing_chain(BlockDriverState *bs, BlockDriverState *base,
Error **errp);
void bdrv_unfreeze_backing_chain(BlockDriverState *bs, BlockDriverState *base);
int coroutine_fn bdrv_co_delete_file(BlockDriverState *bs, Error **errp);
void coroutine_fn bdrv_co_delete_file_noerr(BlockDriverState *bs);
typedef struct BdrvCheckResult {