Some Hypervisors detach VFs from VMs by instantly causing an FLR event
to be generated for a VF.
In the mlx4 case, this will cause that VF's comm channel to be disabled
before the VM has an opportunity to invoke the VF device's "shutdown"
method.
For such Hypervisors, there is a race condition between the VF's
shutdown method and its internal-error detection/reset thread.
The internal-error detection/reset thread (which runs every 5 seconds) also
detects a disabled comm channel. If the internal-error detection/reset
flow wins the race, we still get delays (while that flow tries repeatedly
to detect comm-channel recovery).
The cited commit fixed the command timeout problem when the
internal-error detection/reset flow loses the race.
This commit avoids the unneeded delays when the internal-error
detection/reset flow wins.
The recent changes that added SMB3 encryption support introduced
a possible use after free in the demultiplex thread. When we
process an encrypted packed we obtain a pointer to SMB session
but do not obtain a reference. This can possibly lead to a situation
when this session was freed before we copy a decryption key from
there. Fix this by obtaining a copy of the key rather than a pointer
to the session under a spinlock.
Signed-off-by: Pavel Shilovsky <email address hidden>
Signed-off-by: Steve French <email address hidden>
(cherry picked from commit 61cfac6f267dabcf2740a7ec8a0295833b28b5f5)
Acked-by: Brad Figg <email address hidden>
Signed-off-by: Marcelo Henrique Cerri <email address hidden>
Allow to decrypt transformed packets that are bigger than the big
buffer size. In particular it is used for read responses that can
only exceed the big buffer size.
Since we have two different types of reads (pagecache and direct)
we need to process such responses differently after decryption of
a packet. The change allows to specify a callback that copies a read
payload data into preallocated pages.
We need to process read responses differently because the data
should go directly into preallocated pages. This can be done
by specifying a mid handle callback.