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Re: [libvirt] [PATCH] qemu-ns: Detect /dev/* mount point duplicates even better



On Wed, Nov 08, 2017 at 04:09:57PM +0100, Michal Privoznik wrote:
> In 4f1570720218302 I've tried to make duplicates detection for
> nested /dev mount better. However, I've missed the obvious case
> when there are two same mount points. For instance if:
> 
>   # mount --bind /dev/blah /dev/blah
>   # mount --bind /dev/blah /dev/blah
> 
> Yeah, very unlikely but possible.

It isn't all that unlikely - libvirt itself sets up mounts just like
that for LXC containers it spawns :-)

> 
> Signed-off-by: Michal Privoznik <mprivozn redhat com>
> ---
>  src/qemu/qemu_domain.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
> index 702463547..61d28337b 100644
> --- a/src/qemu/qemu_domain.c
> +++ b/src/qemu/qemu_domain.c
> @@ -8352,7 +8352,7 @@ qemuDomainGetPreservedMounts(virQEMUDriverConfigPtr cfg,
>          while (j < nmounts) {
>              char *c = STRSKIP(mounts[j], mounts[i]);
>  
> -            if (c && *c == '/') {
> +            if (c && (*c == '/' || *c == '\0')) {
>                  VIR_DEBUG("Dropping path %s because of %s", mounts[j], mounts[i]);
>                  VIR_DELETE_ELEMENT(mounts, j, nmounts);
>              } else {
> -- 
> 2.13.6
> 
> --
> libvir-list mailing list
> libvir-list redhat com
> https://www.redhat.com/mailman/listinfo/libvir-list

Regards,
Daniel
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