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Drivers: hv: vmbus: Move __vmbus_open()
Pure function movement, no functional changes. The move is made, because in a later change, __vmbus_open() will rely on some static functions afterwards, so we separate the move and the modification of __vmbus_open() in two patches to make it easy to review. Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200916034817.30282-3-boqun.feng@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Boqun Feng
Wei Liu
parent
a5dda201a0
commit
edd9bbc1d9
@ -109,160 +109,6 @@ int vmbus_alloc_ring(struct vmbus_channel *newchannel,
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}
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EXPORT_SYMBOL_GPL(vmbus_alloc_ring);
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static int __vmbus_open(struct vmbus_channel *newchannel,
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void *userdata, u32 userdatalen,
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void (*onchannelcallback)(void *context), void *context)
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{
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struct vmbus_channel_open_channel *open_msg;
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struct vmbus_channel_msginfo *open_info = NULL;
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struct page *page = newchannel->ringbuffer_page;
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u32 send_pages, recv_pages;
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unsigned long flags;
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int err;
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if (userdatalen > MAX_USER_DEFINED_BYTES)
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return -EINVAL;
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send_pages = newchannel->ringbuffer_send_offset;
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recv_pages = newchannel->ringbuffer_pagecount - send_pages;
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if (newchannel->state != CHANNEL_OPEN_STATE)
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return -EINVAL;
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newchannel->state = CHANNEL_OPENING_STATE;
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newchannel->onchannel_callback = onchannelcallback;
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newchannel->channel_callback_context = context;
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err = hv_ringbuffer_init(&newchannel->outbound, page, send_pages);
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if (err)
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goto error_clean_ring;
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err = hv_ringbuffer_init(&newchannel->inbound,
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&page[send_pages], recv_pages);
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if (err)
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goto error_clean_ring;
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/* Establish the gpadl for the ring buffer */
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newchannel->ringbuffer_gpadlhandle = 0;
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err = vmbus_establish_gpadl(newchannel,
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page_address(newchannel->ringbuffer_page),
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(send_pages + recv_pages) << PAGE_SHIFT,
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&newchannel->ringbuffer_gpadlhandle);
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if (err)
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goto error_clean_ring;
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/* Create and init the channel open message */
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open_info = kmalloc(sizeof(*open_info) +
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sizeof(struct vmbus_channel_open_channel),
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GFP_KERNEL);
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if (!open_info) {
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err = -ENOMEM;
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goto error_free_gpadl;
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}
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init_completion(&open_info->waitevent);
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open_info->waiting_channel = newchannel;
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open_msg = (struct vmbus_channel_open_channel *)open_info->msg;
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open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
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open_msg->openid = newchannel->offermsg.child_relid;
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open_msg->child_relid = newchannel->offermsg.child_relid;
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open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
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open_msg->downstream_ringbuffer_pageoffset = newchannel->ringbuffer_send_offset;
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open_msg->target_vp = hv_cpu_number_to_vp_number(newchannel->target_cpu);
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if (userdatalen)
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memcpy(open_msg->userdata, userdata, userdatalen);
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_add_tail(&open_info->msglistentry,
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&vmbus_connection.chn_msg_list);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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if (newchannel->rescind) {
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err = -ENODEV;
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goto error_free_info;
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}
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err = vmbus_post_msg(open_msg,
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sizeof(struct vmbus_channel_open_channel), true);
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trace_vmbus_open(open_msg, err);
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if (err != 0)
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goto error_clean_msglist;
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wait_for_completion(&open_info->waitevent);
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_del(&open_info->msglistentry);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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if (newchannel->rescind) {
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err = -ENODEV;
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goto error_free_info;
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}
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if (open_info->response.open_result.status) {
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err = -EAGAIN;
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goto error_free_info;
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}
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newchannel->state = CHANNEL_OPENED_STATE;
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kfree(open_info);
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return 0;
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error_clean_msglist:
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_del(&open_info->msglistentry);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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error_free_info:
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kfree(open_info);
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error_free_gpadl:
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vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
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newchannel->ringbuffer_gpadlhandle = 0;
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error_clean_ring:
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hv_ringbuffer_cleanup(&newchannel->outbound);
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hv_ringbuffer_cleanup(&newchannel->inbound);
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newchannel->state = CHANNEL_OPEN_STATE;
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return err;
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}
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/*
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* vmbus_connect_ring - Open the channel but reuse ring buffer
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*/
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int vmbus_connect_ring(struct vmbus_channel *newchannel,
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void (*onchannelcallback)(void *context), void *context)
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{
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return __vmbus_open(newchannel, NULL, 0, onchannelcallback, context);
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}
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EXPORT_SYMBOL_GPL(vmbus_connect_ring);
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/*
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* vmbus_open - Open the specified channel.
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*/
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int vmbus_open(struct vmbus_channel *newchannel,
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u32 send_ringbuffer_size, u32 recv_ringbuffer_size,
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void *userdata, u32 userdatalen,
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void (*onchannelcallback)(void *context), void *context)
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{
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int err;
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err = vmbus_alloc_ring(newchannel, send_ringbuffer_size,
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recv_ringbuffer_size);
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if (err)
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return err;
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err = __vmbus_open(newchannel, userdata, userdatalen,
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onchannelcallback, context);
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if (err)
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vmbus_free_ring(newchannel);
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return err;
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}
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EXPORT_SYMBOL_GPL(vmbus_open);
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/* Used for Hyper-V Socket: a guest client's connect() to the host */
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int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id,
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const guid_t *shv_host_servie_id)
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@ -556,6 +402,161 @@ cleanup:
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}
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EXPORT_SYMBOL_GPL(vmbus_establish_gpadl);
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static int __vmbus_open(struct vmbus_channel *newchannel,
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void *userdata, u32 userdatalen,
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void (*onchannelcallback)(void *context), void *context)
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{
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struct vmbus_channel_open_channel *open_msg;
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struct vmbus_channel_msginfo *open_info = NULL;
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struct page *page = newchannel->ringbuffer_page;
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u32 send_pages, recv_pages;
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unsigned long flags;
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int err;
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if (userdatalen > MAX_USER_DEFINED_BYTES)
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return -EINVAL;
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send_pages = newchannel->ringbuffer_send_offset;
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recv_pages = newchannel->ringbuffer_pagecount - send_pages;
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if (newchannel->state != CHANNEL_OPEN_STATE)
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return -EINVAL;
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newchannel->state = CHANNEL_OPENING_STATE;
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newchannel->onchannel_callback = onchannelcallback;
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newchannel->channel_callback_context = context;
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err = hv_ringbuffer_init(&newchannel->outbound, page, send_pages);
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if (err)
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goto error_clean_ring;
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err = hv_ringbuffer_init(&newchannel->inbound,
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&page[send_pages], recv_pages);
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if (err)
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goto error_clean_ring;
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/* Establish the gpadl for the ring buffer */
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newchannel->ringbuffer_gpadlhandle = 0;
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err = vmbus_establish_gpadl(newchannel,
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page_address(newchannel->ringbuffer_page),
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(send_pages + recv_pages) << PAGE_SHIFT,
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&newchannel->ringbuffer_gpadlhandle);
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if (err)
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goto error_clean_ring;
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/* Create and init the channel open message */
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open_info = kmalloc(sizeof(*open_info) +
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sizeof(struct vmbus_channel_open_channel),
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GFP_KERNEL);
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if (!open_info) {
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err = -ENOMEM;
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goto error_free_gpadl;
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}
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init_completion(&open_info->waitevent);
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open_info->waiting_channel = newchannel;
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open_msg = (struct vmbus_channel_open_channel *)open_info->msg;
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open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
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open_msg->openid = newchannel->offermsg.child_relid;
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open_msg->child_relid = newchannel->offermsg.child_relid;
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open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
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open_msg->downstream_ringbuffer_pageoffset = newchannel->ringbuffer_send_offset;
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open_msg->target_vp = hv_cpu_number_to_vp_number(newchannel->target_cpu);
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if (userdatalen)
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memcpy(open_msg->userdata, userdata, userdatalen);
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_add_tail(&open_info->msglistentry,
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&vmbus_connection.chn_msg_list);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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if (newchannel->rescind) {
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err = -ENODEV;
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goto error_free_info;
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}
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err = vmbus_post_msg(open_msg,
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sizeof(struct vmbus_channel_open_channel), true);
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trace_vmbus_open(open_msg, err);
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if (err != 0)
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goto error_clean_msglist;
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wait_for_completion(&open_info->waitevent);
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_del(&open_info->msglistentry);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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if (newchannel->rescind) {
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err = -ENODEV;
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goto error_free_info;
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}
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if (open_info->response.open_result.status) {
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err = -EAGAIN;
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goto error_free_info;
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}
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newchannel->state = CHANNEL_OPENED_STATE;
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kfree(open_info);
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return 0;
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error_clean_msglist:
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_del(&open_info->msglistentry);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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error_free_info:
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kfree(open_info);
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error_free_gpadl:
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vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
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newchannel->ringbuffer_gpadlhandle = 0;
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error_clean_ring:
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hv_ringbuffer_cleanup(&newchannel->outbound);
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hv_ringbuffer_cleanup(&newchannel->inbound);
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newchannel->state = CHANNEL_OPEN_STATE;
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return err;
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}
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/*
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* vmbus_connect_ring - Open the channel but reuse ring buffer
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*/
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int vmbus_connect_ring(struct vmbus_channel *newchannel,
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void (*onchannelcallback)(void *context), void *context)
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{
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return __vmbus_open(newchannel, NULL, 0, onchannelcallback, context);
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}
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EXPORT_SYMBOL_GPL(vmbus_connect_ring);
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/*
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* vmbus_open - Open the specified channel.
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*/
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int vmbus_open(struct vmbus_channel *newchannel,
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u32 send_ringbuffer_size, u32 recv_ringbuffer_size,
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void *userdata, u32 userdatalen,
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void (*onchannelcallback)(void *context), void *context)
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{
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int err;
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err = vmbus_alloc_ring(newchannel, send_ringbuffer_size,
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recv_ringbuffer_size);
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if (err)
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return err;
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err = __vmbus_open(newchannel, userdata, userdatalen,
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onchannelcallback, context);
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if (err)
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vmbus_free_ring(newchannel);
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return err;
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}
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EXPORT_SYMBOL_GPL(vmbus_open);
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/*
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* vmbus_teardown_gpadl -Teardown the specified GPADL handle
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*/
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