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[Qemu-devel] [PATCH v2 07/10] file-posix: Forbid trying to change unsupp
From: |
Alberto Garcia |
Subject: |
[Qemu-devel] [PATCH v2 07/10] file-posix: Forbid trying to change unsupported options during reopen |
Date: |
Mon, 3 Sep 2018 17:34:05 +0300 |
The file-posix code is used for the "file", "host_device" and
"host_cdrom" drivers, and it allows reopening images. However the only
option that is actually processed is "x-check-cache-dropped", and
changes in all other options (e.g. "filename") are silently ignored:
(qemu) qemu-io virtio0 "reopen -o file.filename=no-such-file"
While we could allow changing some of the other options, let's keep
things as they are for now but return an error if the user tries to
change any of them.
Signed-off-by: Alberto Garcia <address@hidden>
---
block/file-posix.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index ddac0cc3e6..d4ec2cb3dd 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -850,8 +850,13 @@ static int raw_reopen_prepare(BDRVReopenState *state,
goto out;
}
- rs->check_cache_dropped = qemu_opt_get_bool(opts, "x-check-cache-dropped",
- false);
+ rs->check_cache_dropped =
+ qemu_opt_get_bool_del(opts, "x-check-cache-dropped", false);
+
+ /* This driver's reopen function doesn't currently allow changing
+ * other options, so let's put them back in the original QDict and
+ * bdrv_reopen_prepare() will detect changes and complain. */
+ qemu_opts_to_qdict(opts, state->options);
if (s->type == FTYPE_CD) {
rs->open_flags |= O_NONBLOCK;
--
2.11.0
- [Qemu-devel] [PATCH v2 05/10] block: Allow child references on reopen, (continued)
- [Qemu-devel] [PATCH v2 05/10] block: Allow child references on reopen, Alberto Garcia, 2018/09/03
- [Qemu-devel] [PATCH v2 09/10] block: Allow changing 'detect-zeroes' on reopen, Alberto Garcia, 2018/09/03
- [Qemu-devel] [PATCH v2 08/10] block: Allow changing 'discard' on reopen, Alberto Garcia, 2018/09/03
- [Qemu-devel] [PATCH v2 02/10] file-posix: x-check-cache-dropped should default to false on reopen, Alberto Garcia, 2018/09/03
- [Qemu-devel] [PATCH v2 06/10] block: Forbid trying to change unsupported options during reopen, Alberto Garcia, 2018/09/03
- [Qemu-devel] [PATCH v2 07/10] file-posix: Forbid trying to change unsupported options during reopen,
Alberto Garcia <=