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qemu-io: Use purely string blockdev options 

Currently, qemu-io only uses string-valued blockdev options (as all are
converted directly from QemuOpts) -- with one exception: -U adds the
force-share option as a boolean.  This in itself is already a bit
questionable, but a real issue is that it also assumes the value already
existing in the options QDict would be a boolean, which is wrong.

That has the following effect:

$ ./qemu-io -r -U --image-opts \
    driver=file,filename=/dev/null,force-share=off
[1]    15200 segmentation fault (core dumped)  ./qemu-io -r -U
--image-opts driver=file,filename=/dev/null,force-share=off

Since @opts is converted from QemuOpts, the value must be a string, and
we have to compare it as such.  Consequently, it makes sense to also set
it as a string instead of a boolean.

Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180502202051.15493-2-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2018-05-02 22:20:49 +02:00
parent c1e3489dfa
commit 2a01c01f9e
1 changed files with 2 additions and 2 deletions
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4
qemu-io.c
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@ -95,12 +95,12 @@ static int openfile(char *name, int flags, bool writethrough, bool force_share,
opts = qdict_new();
}
if (qdict_haskey(opts, BDRV_OPT_FORCE_SHARE)
&& !qdict_get_bool(opts, BDRV_OPT_FORCE_SHARE)) {
&& strcmp(qdict_get_str(opts, BDRV_OPT_FORCE_SHARE), "on")) {
error_report("-U conflicts with image options");
qobject_unref(opts);
return 1;
}
qdict_put_bool(opts, BDRV_OPT_FORCE_SHARE, true);
qdict_put_str(opts, BDRV_OPT_FORCE_SHARE, "on");
}
qemuio_blk = blk_new_open(name, NULL, opts, flags, &local_err);
if (!qemuio_blk) {