[Libguestfs] [PATCH nbdkit 2/2] Add new retry filter.
Eric Blake
eblake at redhat.com
Thu Sep 19 12:25:53 UTC 2019
On 9/19/19 6:37 AM, Richard W.M. Jones wrote:
> On Thu, Sep 19, 2019 at 12:34:17PM +0100, Richard W.M. Jones wrote:
>> diff --git a/server/backend.c b/server/backend.c
>> index 8a434bd..b8c5742 100644
>> --- a/server/backend.c
>> +++ b/server/backend.c
>> @@ -224,9 +224,17 @@ backend_valid_range (struct backend *b, struct connection *conn,
>> int
>> backend_reopen (struct backend *b, struct connection *conn, int readonly)
>> {
>> + struct b_conn_handle *h = &conn->handles[b->i];
>> +
>> debug ("%s: reopen", b->name);
>>
>> b->close (b, conn);
>> +
>> + /* This forces .open to recalculate h->can_write, which might have
>> + * changed since we may have a new readonly value.
>> + */
>> + h->can_write = -1;
We probably ought to reset ALL of the h->can_* cached values. If
h->can_write changes, that also impacts h->can_zero and friends.
>> +
>> return backend_open (b, conn, readonly);
>> }
>
> Obviously this hunk should be in the first patch ...
>
> Rich.
>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
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