v3: move qemu_fd_is_valid() checking into a new function qemu_try_set_nonblock(), and use qemu_try_set_nonblock() in qemu_set_nonblock().
v2: Add patch from Daniel to check the fd can be used I have updated Daniel's patch not to check for EINVAL on TUNGETIFF as I think we can avoid this special case because TUNGETIFF is available since kernel v2.6.27 (October 2008) Moreover I think the code was wrong as it was checking with -EINVAL and not EINVAL. Daniel P. Berrang�� (1): net: detect errors from probing vnet hdr flag for TAP devices Laurent Vivier (1): net: tap: check if the file descriptor is valid before using it include/qemu/sockets.h | 1 + net/tap-bsd.c | 2 +- net/tap-linux.c | 8 +++--- net/tap-solaris.c | 2 +- net/tap-stub.c | 2 +- net/tap.c | 41 ++++++++++++++++++++++++------ net/tap_int.h | 2 +- util/oslib-posix.c | 26 +++++++++++++------ util/oslib-win32.c | 57 ++++++++++++++++++++++++------------------ 9 files changed, 93 insertions(+), 48 deletions(-) -- 2.26.2