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ivshmem: Store file descriptor for vhost-user negotiation

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If virtio-net driver allocates memory in ivshmem shared memory,
vhost-net will work correctly, but vhost-user will not work because
a fd of shared memory will not be sent to vhost-user backend.
This patch fixes ivshmem to store file descriptor of shared memory.
It will be used when vhost-user negotiates vhost-user backend.

Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Tetsuya Mukawa 2015-12-21 12:47:34 +09:00 • committed by Michael S. Tsirkin
parent 50e5ae4dc3
commit 56a571d9c8
3 changed files with 18 additions and 2 deletions
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10
exec.c
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@ -1757,6 +1757,16 @@ int qemu_get_ram_fd(ram_addr_t addr)
return fd;
}
void qemu_set_ram_fd(ram_addr_t addr, int fd)
{
RAMBlock *block;
rcu_read_lock();
block = qemu_get_ram_block(addr);
block->fd = fd;
rcu_read_unlock();
}
void *qemu_get_ram_block_host_ptr(ram_addr_t addr)
{
RAMBlock *block;