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block: Use bdrv_reopen_set_read_only() in qmp_change_backing_file() 

This patch replaces the bdrv_reopen() calls that set and remove the
BDRV_O_RDWR flag with the new bdrv_reopen_set_read_only() function.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alberto Garcia 2018-11-12 16:00:38 +02:00 committed by Kevin Wolf
parent e7d22f8bc6
commit 051a60f6a3
1 changed files with 2 additions and 6 deletions
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8
blockdev.c
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@ -4100,7 +4100,6 @@ void qmp_change_backing_file(const char *device,
BlockDriverState *image_bs = NULL;
Error *local_err = NULL;
bool ro;
int open_flags;
int ret;
bs = qmp_get_root_bs(device, errp);
@ -4142,13 +4141,10 @@ void qmp_change_backing_file(const char *device,
}
/* if not r/w, reopen to make r/w */
open_flags = image_bs->open_flags;
ro = bdrv_is_read_only(image_bs);
if (ro) {
bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
if (local_err) {
error_propagate(errp, local_err);
if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) {
goto out;
}
}
@ -4164,7 +4160,7 @@ void qmp_change_backing_file(const char *device,
}
if (ro) {
bdrv_reopen(image_bs, open_flags, &local_err);
bdrv_reopen_set_read_only(image_bs, true, &local_err);
error_propagate(errp, local_err);
}