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authorPeter Maydell <peter.maydell@linaro.org>2014-01-24 14:56:17 +0100
committerKevin Wolf <kwolf@redhat.com>2014-01-24 16:07:08 +0100
commit031fd1be5618c347f9aeb44ec294f14a541e42b2 (patch)
treea410b58ea398e4df26543d0751352cab3a401961 /xen-all.c
parent0901f67ecdb74d9ba1451e3b4367194cd43f96b4 (diff)
block/curl: Implement the libcurl timer callback interface
libcurl versions 7.16.0 and later have a timer callback interface which must be implemented in order for libcurl to make forward progress (it will sometimes rely on being called back on the timeout if there are no file descriptors registered). Implement the callback, and use a QEMU AIO timer to ensure we prod libcurl again when it asks us to. Based on Peter's original patch plus my fix to add curl_multi_timeout_do. Should compile just fine even on older versions of libcurl. I also tried copy-on-read and streaming: $ ./qemu-img create -f qcow2 -o \ backing_file=http://download.fedoraproject.org/pub/fedora/linux/releases/20/Live/x86_64/Fedora-Live-Desktop-x86_64-20-1.iso \ foo.qcow2 1G $ x86_64-softmmu/qemu-system-x86_64 \ -drive if=none,file=foo.qcow2,copy-on-read=on,id=cd \ -device ide-cd,drive=cd --enable-kvm -m 1024 Direct http usage is probably too slow, but with copy-on-read ultimately the image does boot! After some time, streaming gets canceled by an EIO, which needs further investigation. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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