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6 commits

Author SHA1 Message Date
David Gibson
a83c806d17 vhost_user: Don't export several functions
vhost-user added several functions which are exposed in headers, but not
used outside the file where they're defined.  I can't tell if these are
really internal functions, or of they're logically supposed to be exported,
but we don't happen to have anything using them yet.

For the time being, just remove the exports.  We can add them back if we
need to.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2025-03-07 02:21:24 +01:00
Laurent Vivier
3c1d91b816 vhost-user: add VHOST_USER_SET_LOG_BASE command
Sets logging shared memory space.

When the back-end has VHOST_USER_PROTOCOL_F_LOG_SHMFD protocol feature,
the log memory fd is provided in the ancillary data of
VHOST_USER_SET_LOG_BASE message, the size and offset of shared memory
area provided in the message.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
[sbrivio: Fix coding style in a bunch of places]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2025-01-20 19:51:24 +01:00
Laurent Vivier
b04195c60f vhost-user: add VHOST_USER_SET_LOG_FD command
VHOST_USER_SET_LOG_FD is an optional message with an eventfd
in ancillary data, it may be used to inform the front-end that the
log has been modified.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
[sbrivio: Fix comment to vu_set_log_fd_exec()]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2025-01-20 19:51:24 +01:00
Laurent Vivier
6016e04a3a vhost-user: update protocol features and commands list
vhost-user protocol specification has been updated with
feature flags and commands we will need to implement migration.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
[sbrivio: Fix comment to union vhost_user_payload]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2025-01-20 19:51:24 +01:00
Laurent Vivier
28997fcb29 vhost-user: add vhost-user
add virtio and vhost-user functions to connect with QEMU.

  $ ./passt --vhost-user

and

  # qemu-system-x86_64 ... -m 4G \
        -object memory-backend-memfd,id=memfd0,share=on,size=4G \
        -numa node,memdev=memfd0 \
        -chardev socket,id=chr0,path=/tmp/passt_1.socket \
        -netdev vhost-user,id=netdev0,chardev=chr0 \
        -device virtio-net,mac=9a:2b:2c:2d:2e:2f,netdev=netdev0 \
        ...

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: as suggested by lvivier, include <netinet/if_ether.h>
 before including <linux/if_ether.h> as C libraries such as musl
 __UAPI_DEF_ETHHDR in <netinet/if_ether.h> if they already have
 a definition of struct ethhdr]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2024-11-27 16:47:32 +01:00
Laurent Vivier
31117b27c6 vhost-user: introduce vhost-user API
Add vhost_user.c and vhost_user.h that define the functions needed
to implement vhost-user backend.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
2024-11-27 16:12:19 +01:00