linux-kernel - Re: [PATCH v1] tools/hv: async name resolution in kvp

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Message-ID: <20191028161754.GF1554@sasha-vm>
Date:   Mon, 28 Oct 2019 12:17:54 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Olaf Hering <olaf@...fle.de>
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "open list:Hyper-V CORE AND DRIVERS" <linux-hyperv@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] tools/hv: async name resolution in kvp_daemon

On Thu, Oct 24, 2019 at 04:49:43PM +0200, Olaf Hering wrote:
>The hostname is resolved just once since commit 58125210ab3b ("Tools:
>hv: cache FQDN in kvp_daemon to avoid timeouts") to make sure the VM
>responds within the timeout limits to requests from the host.
>
>If for some reason getaddrinfo fails, the string returned by the
>"FullyQualifiedDomainName" request contains some error string, which is
>then used by tools on the host side.
>
>Adjust the code to resolve the current hostname in a separate thread.
>This thread loops until getaddrinfo returns success. During this time
>all "FullyQualifiedDomainName" requests will be answered with an empty
>string.
>
>Signed-off-by: Olaf Hering <olaf@...fle.de>

Thank for the patch Olaf. However, it seems to break build for me:

/usr/bin/ld: hv_kvp_daemon-in.o: in function `kvp_obtain_domain_name':
/home/sasha/linux/tools/hv/hv_kvp_daemon.c:1372: undefined reference to `pthread_create'
/usr/bin/ld: /home/sasha/linux/tools/hv/hv_kvp_daemon.c:1377: undefined reference to `pthread_detach'
collect2: error: ld returned 1 exit status

-- 
Thanks,
Sasha