Stefan Hajnoczi e7b337326d virtiofsd: prevent fv_queue_thread() vs virtio_loop() races ... We call into libvhost-user from the virtqueue handler thread and the vhost-user message processing thread without a lock. There is nothing protecting the virtqueue handler thread if the vhost-user message processing thread changes the virtqueue or memory table while it is running. This patch introduces a read-write lock. Virtqueue handler threads are readers. The vhost-user message processing thread is a writer. This will allow concurrency for multiqueue in the future while protecting against fv_queue_thread() vs virtio_loop() races. Note that the critical sections could be made smaller but it would be more invasive and require libvhost-user changes. Let's start simple and improve performance later, if necessary. Another option would be an RCU-style approach with lighter-weight primitives. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>		2020-01-23 16:41:37 +00:00
..
50-qemu-virtiofsd.json.in	virtiofsd: add vhost-user.json file	2020-01-23 16:41:36 +00:00
buffer.c	virtiofsd: add fuse_mbuf_iter API	2020-01-23 16:41:36 +00:00
fuse_common.h	virtiofsd: Parse flag FUSE_WRITE_KILL_PRIV	2020-01-23 16:41:37 +00:00
fuse_i.h	virtiofsd: Plumb fuse_bufvec through to do_write_buf	2020-01-23 16:41:36 +00:00
fuse_log.c	virtiofsd: Fix common header and define for QEMU builds	2020-01-23 16:41:36 +00:00
fuse_log.h	virtiofsd: Format imported files to qemu style	2020-01-23 16:41:36 +00:00
fuse_lowlevel.c	virtiofsd: use fuse_lowlevel_is_virtio() in fuse_session_destroy()	2020-01-23 16:41:37 +00:00
fuse_lowlevel.h	virtiofsd: print log only when priority is high enough	2020-01-23 16:41:37 +00:00
fuse_misc.h	virtiofsd: support nanosecond resolution for file timestamp	2020-01-23 16:41:37 +00:00
fuse_opt.c	virtiofsd: Fix common header and define for QEMU builds	2020-01-23 16:41:36 +00:00
fuse_opt.h	virtiofsd: Format imported files to qemu style	2020-01-23 16:41:36 +00:00
fuse_signals.c	virtiofsd: Fix common header and define for QEMU builds	2020-01-23 16:41:36 +00:00
fuse_virtio.c	virtiofsd: prevent fv_queue_thread() vs virtio_loop() races	2020-01-23 16:41:37 +00:00
fuse_virtio.h	virtiofsd: cleanup allocated resource in se	2020-01-23 16:41:37 +00:00
fuse.h	virtiofsd: Format imported files to qemu style	2020-01-23 16:41:36 +00:00
helper.c	virtiofsd: Support remote posix locks	2020-01-23 16:41:37 +00:00
Makefile.objs	virtiofsd: add seccomp whitelist	2020-01-23 16:41:37 +00:00
passthrough_helpers.h	virtiofsd: Format imported files to qemu style	2020-01-23 16:41:36 +00:00
passthrough_ll.c	virtiofsd: Support remote posix locks	2020-01-23 16:41:37 +00:00
seccomp.c	virtiofsd: add --syslog command-line option	2020-01-23 16:41:37 +00:00
seccomp.h	virtiofsd: add --syslog command-line option	2020-01-23 16:41:37 +00:00