On 29.04.20 16:57, Dr. David Alan Gilbert wrote:
> * Dr. David Alan Gilbert (dgilb...@redhat.com) wrote:
>> * Max Reitz (mre...@redhat.com) wrote:
>>> Currently, setup_mounts() bind-mounts the shared directory without
>>> MS_REC. This makes all submounts disappear.
>>>
>>> Pass MS_REC so that the guest can see submounts again.
>>
>> Thanks!
>>
>>> Fixes: 3ca8a2b1c83eb185c232a4e87abbb65495263756
>>
>> Should this actually be 5baa3b8e95064c2434bd9e2f312edd5e9ae275dc ?
>>
>>> Signed-off-by: Max Reitz <mre...@redhat.com>
>>> ---
>>> tools/virtiofsd/passthrough_ll.c | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/tools/virtiofsd/passthrough_ll.c
>>> b/tools/virtiofsd/passthrough_ll.c
>>> index 4c35c95b25..9d7f863e66 100644
>>> --- a/tools/virtiofsd/passthrough_ll.c
>>> +++ b/tools/virtiofsd/passthrough_ll.c
>>> @@ -2643,7 +2643,7 @@ static void setup_mounts(const char *source)
>>> int oldroot;
>>> int newroot;
>>>
>>> - if (mount(source, source, NULL, MS_BIND, NULL) < 0) {
>>> + if (mount(source, source, NULL, MS_BIND | MS_REC, NULL) < 0) {
>>> fuse_log(FUSE_LOG_ERR, "mount(%s, %s, MS_BIND): %m\n", source,
>>> source);
>>> exit(1);
>>> }
>>
>> Do we want MS_SLAVE to pick up future mounts that might happenf rom the
>> host?
>> What's the interaction between this and the MS_REC|MS_SLAVE that we have
>> a few lines above for / ?
>
> Just to confirm something from vgoyal, and what had confused me about
> why we hadn't spotted this earlier.
>
> Even without this patch, the SLAVE stuff worked so if you start the
> daemon and *then* mount under the shared directory, the guest sees it
> with or without this patch.Hm, I don’t. Do you really? Max
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