On 06/24/2016 04:09 AM, Pranay Kr. Srivastava wrote: > When a timeout occurs or a recv fails, then > instead of abruplty killing nbd block device s/abruplty/abruptly/ > wait for it's users to finish. s/it's/its/ > > This is more required when filesystem(s) like > ext2 or ext3 don't expect their buffer heads to > disappear while the filesystem is mounted. > > Each open of a nbd device is refcounted, while > the userland program [nbd-client] doing the > NBD_DO_IT ioctl would now wait for any other users > of this device before invalidating the nbd device. > > A timedout or a disconnected device, if in use, can't > be used until it has been resetted. The resetting happens s/resetted/reset/ > when all tasks having this bdev open closes this bdev. > > Signed-off-by: Pranay Kr. Srivastava <pranjas@...17...> > --- > drivers/block/nbd.c | 124 ++++++++++++++++++++++++++++++++++++++++------------ > 1 file changed, 96 insertions(+), 28 deletions(-) > -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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