Skip to main content

Browse the archive

https://github.com/torvalds/linux
29 July 2024, 15:18:00 UTC
Revision 1f5d2e3bab16369d5d4b4020a25db4ab1f4f082c authored by Andrey Smetanin on 24 April 2023, 20:44:11 UTC, committed by Michael S. Tsirkin on 08 June 2023, 19:43:08 UTC 
vhost_net: revert upend_idx only on retriable error
 
Fix possible virtqueue used buffers leak and corresponding stuck
in case of temporary -EIO from sendmsg() which is produced by
tun driver while backend device is not up.

In case of no-retriable error and zcopy do not revert upend_idx
to pass packet data (that is update used_idx in corresponding
vhost_zerocopy_signal_used()) as if packet data has been
transferred successfully.

v2: set vq->heads[ubuf->desc].len equal to VHOST_DMA_DONE_LEN
in case of fake successful transmit.

Signed-off-by: Andrey Smetanin <asmetanin@yandex-team.ru>
Message-Id: <20230424204411.24888-1-asmetanin@yandex-team.ru>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andrey Smetanin <asmetanin@yandex-team.ru>
Acked-by: Jason Wang <jasowang@redhat.com>
1 parent 376daf3
Raw File
Tip revision: 1f5d2e3bab16369d5d4b4020a25db4ab1f4f082c authored by Andrey Smetanin on 24 April 2023, 20:44:11 UTC
vhost_net: revert upend_idx only on retriable error
Tip revision: 1f5d2e3
README 
Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
back to top