Eric Blake 7423f41782 nbd: Limit nbdflags to 16 bits ... Rather than asserting that nbdflags is within range, just give it the correct type to begin with :) nbdflags corresponds to the per-export portion of NBD Protocol "transmission flags", which is 16 bits in response to NBD_OPT_EXPORT_NAME and NBD_OPT_GO. Furthermore, upstream NBD has never passed the global flags to the kernel via ioctl(NBD_SET_FLAGS) (the ioctl was first introduced in NBD 2.9.22; then a latent bug in NBD 3.1 actually tried to OR the global flags with the transmission flags, with the disaster that the addition of NBD_FLAG_NO_ZEROES in 3.9 caused all earlier NBD 3.x clients to treat every export as read-only; NBD 3.10 and later intentionally clip things to 16 bits to pass only transmission flags). Qemu should follow suit, since the current two global flags (NBD_FLAG_FIXED_NEWSTYLE and NBD_FLAG_NO_ZEROES) have no impact on the kernel's behavior during transmission. CC: qemu-stable@nongnu.org Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1469129688-22848-3-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2016-08-03 18:44:56 +02:00
..
client.c	nbd: Limit nbdflags to 16 bits	2016-08-03 18:44:56 +02:00
common.c	nbd: Drop unused offset parameter	2016-07-20 14:11:54 +01:00
Makefile.objs	nbd: Split nbd.c	2016-01-15 18:58:02 +01:00
nbd-internal.h	nbd: Drop unused offset parameter	2016-07-20 14:11:54 +01:00
server.c	nbd: Limit nbdflags to 16 bits	2016-08-03 18:44:56 +02:00