Release 4.17 drivers/hv/channel.c
/*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/hyperv.h>
#include <linux/uio.h>
#include <linux/interrupt.h>
#include "hyperv_vmbus.h"
#define NUM_PAGES_SPANNED(addr, len) \
((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT))
/*
* vmbus_setevent- Trigger an event notification on the specified
* channel.
*/
void vmbus_setevent(struct vmbus_channel *channel)
{
struct hv_monitor_page *monitorpage;
trace_vmbus_setevent(channel);
/*
* For channels marked as in "low latency" mode
* bypass the monitor page mechanism.
*/
if (channel->offermsg.monitor_allocated && !channel->low_latency) {
vmbus_send_interrupt(channel->offermsg.child_relid);
/* Get the child to parent monitor page */
monitorpage = vmbus_connection.monitor_pages[1];
sync_set_bit(channel->monitor_bit,
(unsigned long *)&monitorpage->trigger_group
[channel->monitor_grp].pending);
} else {
vmbus_set_event(channel);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 39 | 44.83% | 1 | 6.25% |
| Haiyang Zhang | 21 | 24.14% | 7 | 43.75% |
| Greg Kroah-Hartman | 8 | 9.20% | 3 | 18.75% |
| Bill Pemberton | 6 | 6.90% | 1 | 6.25% |
| K. Y. Srinivasan | 6 | 6.90% | 1 | 6.25% |
| Vitaly Kuznetsov | 5 | 5.75% | 1 | 6.25% |
| Stephen Hemminger | 1 | 1.15% | 1 | 6.25% |
| Olaf Hering | 1 | 1.15% | 1 | 6.25% |
| Total | 87 | 100.00% | 16 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_setevent);
/*
* vmbus_open - Open the specified channel.
*/
int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
u32 recv_ringbuffer_size, void *userdata, u32 userdatalen,
void (*onchannelcallback)(void *context), void *context)
{
struct vmbus_channel_open_channel *open_msg;
struct vmbus_channel_msginfo *open_info = NULL;
unsigned long flags;
int ret, err = 0;
struct page *page;
if (send_ringbuffer_size % PAGE_SIZE ||
recv_ringbuffer_size % PAGE_SIZE)
return -EINVAL;
spin_lock_irqsave(&newchannel->lock, flags);
if (newchannel->state == CHANNEL_OPEN_STATE) {
newchannel->state = CHANNEL_OPENING_STATE;
} else {
spin_unlock_irqrestore(&newchannel->lock, flags);
return -EINVAL;
}
spin_unlock_irqrestore(&newchannel->lock, flags);
newchannel->onchannel_callback = onchannelcallback;
newchannel->channel_callback_context = context;
/* Allocate the ring buffer */
page = alloc_pages_node(cpu_to_node(newchannel->target_cpu),
GFP_KERNEL|__GFP_ZERO,
get_order(send_ringbuffer_size +
recv_ringbuffer_size));
if (!page)
page = alloc_pages(GFP_KERNEL|__GFP_ZERO,
get_order(send_ringbuffer_size +
recv_ringbuffer_size));
if (!page) {
err = -ENOMEM;
goto error_set_chnstate;
}
newchannel->ringbuffer_pages = page_address(page);
newchannel->ringbuffer_pagecount = (send_ringbuffer_size +
recv_ringbuffer_size) >> PAGE_SHIFT;
ret = hv_ringbuffer_init(&newchannel->outbound, page,
send_ringbuffer_size >> PAGE_SHIFT);
if (ret != 0) {
err = ret;
goto error_free_pages;
}
ret = hv_ringbuffer_init(&newchannel->inbound,
&page[send_ringbuffer_size >> PAGE_SHIFT],
recv_ringbuffer_size >> PAGE_SHIFT);
if (ret != 0) {
err = ret;
goto error_free_pages;
}
/* Establish the gpadl for the ring buffer */
newchannel->ringbuffer_gpadlhandle = 0;
ret = vmbus_establish_gpadl(newchannel,
page_address(page),
send_ringbuffer_size +
recv_ringbuffer_size,
&newchannel->ringbuffer_gpadlhandle);
if (ret != 0) {
err = ret;
goto error_free_pages;
}
/* Create and init the channel open message */
open_info = kmalloc(sizeof(*open_info) +
sizeof(struct vmbus_channel_open_channel),
GFP_KERNEL);
if (!open_info) {
err = -ENOMEM;
goto error_free_gpadl;
}
init_completion(&open_info->waitevent);
open_info->waiting_channel = newchannel;
open_msg = (struct vmbus_channel_open_channel *)open_info->msg;
open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
open_msg->openid = newchannel->offermsg.child_relid;
open_msg->child_relid = newchannel->offermsg.child_relid;
open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
open_msg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >>
PAGE_SHIFT;
open_msg->target_vp = newchannel->target_vp;
if (userdatalen > MAX_USER_DEFINED_BYTES) {
err = -EINVAL;
goto error_free_gpadl;
}
if (userdatalen)
memcpy(open_msg->userdata, userdata, userdatalen);
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_add_tail(&open_info->msglistentry,
&vmbus_connection.chn_msg_list);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
if (newchannel->rescind) {
err = -ENODEV;
goto error_free_gpadl;
}
ret = vmbus_post_msg(open_msg,
sizeof(struct vmbus_channel_open_channel), true);
trace_vmbus_open(open_msg, ret);
if (ret != 0) {
err = ret;
goto error_clean_msglist;
}
wait_for_completion(&open_info->waitevent);
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_del(&open_info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
if (newchannel->rescind) {
err = -ENODEV;
goto error_free_gpadl;
}
if (open_info->response.open_result.status) {
err = -EAGAIN;
goto error_free_gpadl;
}
newchannel->state = CHANNEL_OPENED_STATE;
kfree(open_info);
return 0;
error_clean_msglist:
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_del(&open_info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
error_free_gpadl:
vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
kfree(open_info);
error_free_pages:
hv_ringbuffer_cleanup(&newchannel->outbound);
hv_ringbuffer_cleanup(&newchannel->inbound);
__free_pages(page,
get_order(send_ringbuffer_size + recv_ringbuffer_size));
error_set_chnstate:
newchannel->state = CHANNEL_OPEN_STATE;
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| K. Y. Srinivasan | 210 | 28.42% | 14 | 30.43% |
| Hank Janssen | 170 | 23.00% | 1 | 2.17% |
| Vitaly Kuznetsov | 108 | 14.61% | 7 | 15.22% |
| Bill Pemberton | 104 | 14.07% | 8 | 17.39% |
| Haiyang Zhang | 75 | 10.15% | 7 | 15.22% |
| Greg Kroah-Hartman | 59 | 7.98% | 8 | 17.39% |
| Dexuan Cui | 13 | 1.76% | 1 | 2.17% |
| Total | 739 | 100.00% | 46 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_open);
/* Used for Hyper-V Socket: a guest client's connect() to the host */
int vmbus_send_tl_connect_request(const uuid_le *shv_guest_servie_id,
const uuid_le *shv_host_servie_id)
{
struct vmbus_channel_tl_connect_request conn_msg;
int ret;
memset(&conn_msg, 0, sizeof(conn_msg));
conn_msg.header.msgtype = CHANNELMSG_TL_CONNECT_REQUEST;
conn_msg.guest_endpoint_id = *shv_guest_servie_id;
conn_msg.host_service_id = *shv_host_servie_id;
ret = vmbus_post_msg(&conn_msg, sizeof(conn_msg), true);
trace_vmbus_send_tl_connect_request(&conn_msg, ret);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dexuan Cui | 65 | 78.31% | 1 | 33.33% |
| Vitaly Kuznetsov | 18 | 21.69% | 2 | 66.67% |
| Total | 83 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_send_tl_connect_request);
/*
* create_gpadl_header - Creates a gpadl for the specified buffer
*/
static int create_gpadl_header(void *kbuffer, u32 size,
struct vmbus_channel_msginfo **msginfo)
{
int i;
int pagecount;
struct vmbus_channel_gpadl_header *gpadl_header;
struct vmbus_channel_gpadl_body *gpadl_body;
struct vmbus_channel_msginfo *msgheader;
struct vmbus_channel_msginfo *msgbody = NULL;
u32 msgsize;
int pfnsum, pfncount, pfnleft, pfncurr, pfnsize;
pagecount = size >> PAGE_SHIFT;
/* do we need a gpadl body msg */
pfnsize = MAX_SIZE_CHANNEL_MESSAGE -
sizeof(struct vmbus_channel_gpadl_header) -
sizeof(struct gpa_range);
pfncount = pfnsize / sizeof(u64);
if (pagecount > pfncount) {
/* we need a gpadl body */
/* fill in the header */
msgsize = sizeof(struct vmbus_channel_msginfo) +
sizeof(struct vmbus_channel_gpadl_header) +
sizeof(struct gpa_range) + pfncount * sizeof(u64);
msgheader = kzalloc(msgsize, GFP_KERNEL);
if (!msgheader)
goto nomem;
INIT_LIST_HEAD(&msgheader->submsglist);
msgheader->msgsize = msgsize;
gpadl_header = (struct vmbus_channel_gpadl_header *)
msgheader->msg;
gpadl_header->rangecount = 1;
gpadl_header->range_buflen = sizeof(struct gpa_range) +
pagecount * sizeof(u64);
gpadl_header->range[0].byte_offset = 0;
gpadl_header->range[0].byte_count = size;
for (i = 0; i < pfncount; i++)
gpadl_header->range[0].pfn_array[i] = slow_virt_to_phys(
kbuffer + PAGE_SIZE * i) >> PAGE_SHIFT;
*msginfo = msgheader;
pfnsum = pfncount;
pfnleft = pagecount - pfncount;
/* how many pfns can we fit */
pfnsize = MAX_SIZE_CHANNEL_MESSAGE -
sizeof(struct vmbus_channel_gpadl_body);
pfncount = pfnsize / sizeof(u64);
/* fill in the body */
while (pfnleft) {
if (pfnleft > pfncount)
pfncurr = pfncount;
else
pfncurr = pfnleft;
msgsize = sizeof(struct vmbus_channel_msginfo) +
sizeof(struct vmbus_channel_gpadl_body) +
pfncurr * sizeof(u64);
msgbody = kzalloc(msgsize, GFP_KERNEL);
if (!msgbody) {
struct vmbus_channel_msginfo *pos = NULL;
struct vmbus_channel_msginfo *tmp = NULL;
/*
* Free up all the allocated messages.
*/
list_for_each_entry_safe(pos, tmp,
&msgheader->submsglist,
msglistentry) {
list_del(&pos->msglistentry);
kfree(pos);
}
goto nomem;
}
msgbody->msgsize = msgsize;
gpadl_body =
(struct vmbus_channel_gpadl_body *)msgbody->msg;
/*
* Gpadl is u32 and we are using a pointer which could
* be 64-bit
* This is governed by the guest/host protocol and
* so the hypervisor guarantees that this is ok.
*/
for (i = 0; i < pfncurr; i++)
gpadl_body->pfn[i] = slow_virt_to_phys(
kbuffer + PAGE_SIZE * (pfnsum + i)) >>
PAGE_SHIFT;
/* add to msg header */
list_add_tail(&msgbody->msglistentry,
&msgheader->submsglist);
pfnsum += pfncurr;
pfnleft -= pfncurr;
}
} else {
/* everything fits in a header */
msgsize = sizeof(struct vmbus_channel_msginfo) +
sizeof(struct vmbus_channel_gpadl_header) +
sizeof(struct gpa_range) + pagecount * sizeof(u64);
msgheader = kzalloc(msgsize, GFP_KERNEL);
if (msgheader == NULL)
goto nomem;
INIT_LIST_HEAD(&msgheader->submsglist);
msgheader->msgsize = msgsize;
gpadl_header = (struct vmbus_channel_gpadl_header *)
msgheader->msg;
gpadl_header->rangecount = 1;
gpadl_header->range_buflen = sizeof(struct gpa_range) +
pagecount * sizeof(u64);
gpadl_header->range[0].byte_offset = 0;
gpadl_header->range[0].byte_count = size;
for (i = 0; i < pagecount; i++)
gpadl_header->range[0].pfn_array[i] = slow_virt_to_phys(
kbuffer + PAGE_SIZE * i) >> PAGE_SHIFT;
*msginfo = msgheader;
}
return 0;
nomem:
kfree(msgheader);
kfree(msgbody);
return -ENOMEM;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 334 | 51.86% | 1 | 4.55% |
| Haiyang Zhang | 148 | 22.98% | 5 | 22.73% |
| Greg Kroah-Hartman | 67 | 10.40% | 9 | 40.91% |
| K. Y. Srinivasan | 42 | 6.52% | 1 | 4.55% |
| Bill Pemberton | 36 | 5.59% | 3 | 13.64% |
| Vasiliy Kulikov | 8 | 1.24% | 1 | 4.55% |
| Vitaly Kuznetsov | 8 | 1.24% | 1 | 4.55% |
| Stephen Hemminger | 1 | 0.16% | 1 | 4.55% |
| Total | 644 | 100.00% | 22 | 100.00% |
/*
* vmbus_establish_gpadl - Establish a GPADL for the specified buffer
*
* @channel: a channel
* @kbuffer: from kmalloc or vmalloc
* @size: page-size multiple
* @gpadl_handle: some funky thing
*/
int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer,
u32 size, u32 *gpadl_handle)
{
struct vmbus_channel_gpadl_header *gpadlmsg;
struct vmbus_channel_gpadl_body *gpadl_body;
struct vmbus_channel_msginfo *msginfo = NULL;
struct vmbus_channel_msginfo *submsginfo, *tmp;
struct list_head *curr;
u32 next_gpadl_handle;
unsigned long flags;
int ret = 0;
next_gpadl_handle =
(atomic_inc_return(&vmbus_connection.next_gpadl_handle) - 1);
ret = create_gpadl_header(kbuffer, size, &msginfo);
if (ret)
return ret;
init_completion(&msginfo->waitevent);
msginfo->waiting_channel = channel;
gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg;
gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER;
gpadlmsg->child_relid = channel->offermsg.child_relid;
gpadlmsg->gpadl = next_gpadl_handle;
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_add_tail(&msginfo->msglistentry,
&vmbus_connection.chn_msg_list);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
if (channel->rescind) {
ret = -ENODEV;
goto cleanup;
}
ret = vmbus_post_msg(gpadlmsg, msginfo->msgsize -
sizeof(*msginfo), true);
trace_vmbus_establish_gpadl_header(gpadlmsg, ret);
if (ret != 0)
goto cleanup;
list_for_each(curr, &msginfo->submsglist) {
submsginfo = (struct vmbus_channel_msginfo *)curr;
gpadl_body =
(struct vmbus_channel_gpadl_body *)submsginfo->msg;
gpadl_body->header.msgtype =
CHANNELMSG_GPADL_BODY;
gpadl_body->gpadl = next_gpadl_handle;
ret = vmbus_post_msg(gpadl_body,
submsginfo->msgsize - sizeof(*submsginfo),
true);
trace_vmbus_establish_gpadl_body(gpadl_body, ret);
if (ret != 0)
goto cleanup;
}
wait_for_completion(&msginfo->waitevent);
if (channel->rescind) {
ret = -ENODEV;
goto cleanup;
}
/* At this point, we received the gpadl created msg */
*gpadl_handle = gpadlmsg->gpadl;
cleanup:
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_del(&msginfo->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
list_for_each_entry_safe(submsginfo, tmp, &msginfo->submsglist,
msglistentry) {
kfree(submsginfo);
}
kfree(msginfo);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 150 | 38.17% | 1 | 3.45% |
| Haiyang Zhang | 74 | 18.83% | 7 | 24.14% |
| K. Y. Srinivasan | 52 | 13.23% | 7 | 24.14% |
| Greg Kroah-Hartman | 50 | 12.72% | 6 | 20.69% |
| Vitaly Kuznetsov | 38 | 9.67% | 3 | 10.34% |
| Bill Pemberton | 29 | 7.38% | 5 | 17.24% |
| Total | 393 | 100.00% | 29 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_establish_gpadl);
/*
* vmbus_teardown_gpadl -Teardown the specified GPADL handle
*/
int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
{
struct vmbus_channel_gpadl_teardown *msg;
struct vmbus_channel_msginfo *info;
unsigned long flags;
int ret;
info = kmalloc(sizeof(*info) +
sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL);
if (!info)
return -ENOMEM;
init_completion(&info->waitevent);
info->waiting_channel = channel;
msg = (struct vmbus_channel_gpadl_teardown *)info->msg;
msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN;
msg->child_relid = channel->offermsg.child_relid;
msg->gpadl = gpadl_handle;
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_add_tail(&info->msglistentry,
&vmbus_connection.chn_msg_list);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
if (channel->rescind)
goto post_msg_err;
ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_gpadl_teardown),
true);
trace_vmbus_teardown_gpadl(msg, ret);
if (ret)
goto post_msg_err;
wait_for_completion(&info->waitevent);
post_msg_err:
/*
* If the channel has been rescinded;
* we will be awakened by the rescind
* handler; set the error code to zero so we don't leak memory.
*/
if (channel->rescind)
ret = 0;
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_del(&info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
kfree(info);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 102 | 43.40% | 1 | 4.17% |
| Greg Kroah-Hartman | 45 | 19.15% | 6 | 25.00% |
| K. Y. Srinivasan | 39 | 16.60% | 6 | 25.00% |
| Haiyang Zhang | 24 | 10.21% | 6 | 25.00% |
| Bill Pemberton | 16 | 6.81% | 3 | 12.50% |
| Vitaly Kuznetsov | 9 | 3.83% | 2 | 8.33% |
| Total | 235 | 100.00% | 24 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl);
static void reset_channel_cb(void *arg)
{
struct vmbus_channel *channel = arg;
channel->onchannel_callback = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| K. Y. Srinivasan | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
static int vmbus_close_internal(struct vmbus_channel *channel)
{
struct vmbus_channel_close_channel *msg;
int ret;
/*
* vmbus_on_event(), running in the per-channel tasklet, can race
* with vmbus_close_internal() in the case of SMP guest, e.g., when
* the former is accessing channel->inbound.ring_buffer, the latter
* could be freeing the ring_buffer pages, so here we must stop it
* first.
*/
tasklet_disable(&channel->callback_event);
/*
* In case a device driver's probe() fails (e.g.,
* util_probe() -> vmbus_open() returns -ENOMEM) and the device is
* rescinded later (e.g., we dynamically disable an Integrated Service
* in Hyper-V Manager), the driver's remove() invokes vmbus_close():
* here we should skip most of the below cleanup work.
*/
if (channel->state != CHANNEL_OPENED_STATE) {
ret = -EINVAL;
goto out;
}
channel->state = CHANNEL_OPEN_STATE;
channel->sc_creation_callback = NULL;
/* Stop callback and cancel the timer asap */
if (channel->target_cpu != get_cpu()) {
put_cpu();
smp_call_function_single(channel->target_cpu, reset_channel_cb,
channel, true);
} else {
reset_channel_cb(channel);
put_cpu();
}
/* Send a closing message */
msg = &channel->close_msg.msg;
msg->header.msgtype = CHANNELMSG_CLOSECHANNEL;
msg->child_relid = channel->offermsg.child_relid;
ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_close_channel),
true);
trace_vmbus_close_internal(msg, ret);
if (ret) {
pr_err("Close failed: close post msg return is %d\n", ret);
/*
* If we failed to post the close msg,
* it is perhaps better to leak memory.
*/
goto out;
}
/* Tear down the gpadl for the channel's ring buffer */
if (channel->ringbuffer_gpadlhandle) {
ret = vmbus_teardown_gpadl(channel,
channel->ringbuffer_gpadlhandle);
if (ret) {
pr_err("Close failed: teardown gpadl return %d\n", ret);
/*
* If we failed to teardown gpadl,
* it is perhaps better to leak memory.
*/
goto out;
}
}
/* Cleanup the ring buffers for this channel */
hv_ringbuffer_cleanup(&channel->outbound);
hv_ringbuffer_cleanup(&channel->inbound);
free_pages((unsigned long)channel->ringbuffer_pages,
get_order(channel->ringbuffer_pagecount * PAGE_SIZE));
out:
/* re-enable tasklet for use on re-open */
tasklet_enable(&channel->callback_event);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| K. Y. Srinivasan | 102 | 40.32% | 10 | 37.04% |
| Hank Janssen | 59 | 23.32% | 1 | 3.70% |
| Dexuan Cui | 35 | 13.83% | 4 | 14.81% |
| Haiyang Zhang | 25 | 9.88% | 4 | 14.81% |
| Vitaly Kuznetsov | 9 | 3.56% | 2 | 7.41% |
| Greg Kroah-Hartman | 9 | 3.56% | 3 | 11.11% |
| Stephen Hemminger | 9 | 3.56% | 1 | 3.70% |
| Bill Pemberton | 4 | 1.58% | 1 | 3.70% |
| Masahiro Yamada | 1 | 0.40% | 1 | 3.70% |
| Total | 253 | 100.00% | 27 | 100.00% |
/*
* vmbus_close - Close the specified channel
*/
void vmbus_close(struct vmbus_channel *channel)
{
struct list_head *cur, *tmp;
struct vmbus_channel *cur_channel;
if (channel->primary_channel != NULL) {
/*
* We will only close sub-channels when
* the primary is closed.
*/
return;
}
/*
* Close all the sub-channels first and then close the
* primary channel.
*/
list_for_each_safe(cur, tmp, &channel->sc_list) {
cur_channel = list_entry(cur, struct vmbus_channel, sc_list);
if (cur_channel->rescind) {
wait_for_completion(&cur_channel->rescind_event);
mutex_lock(&vmbus_connection.channel_mutex);
vmbus_close_internal(cur_channel);
hv_process_channel_removal(
cur_channel->offermsg.child_relid);
} else {
mutex_lock(&vmbus_connection.channel_mutex);
vmbus_close_internal(cur_channel);
}
mutex_unlock(&vmbus_connection.channel_mutex);
}
/*
* Now close the primary.
*/
mutex_lock(&vmbus_connection.channel_mutex);
vmbus_close_internal(channel);
mutex_unlock(&vmbus_connection.channel_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| K. Y. Srinivasan | 142 | 100.00% | 4 | 100.00% |
| Total | 142 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_close);
/**
* vmbus_sendpacket() - Send the specified buffer on the given channel
* @channel: Pointer to vmbus_channel structure.
* @buffer: Pointer to the buffer you want to receive the data into.
* @bufferlen: Maximum size of what the the buffer will hold
* @requestid: Identifier of the request
* @type: Type of packet that is being send e.g. negotiate, time
* packet etc.
*
* Sends data in @buffer directly to hyper-v via the vmbus
* This will send the data unparsed to hyper-v.
*
* Mainly used by Hyper-V drivers.
*/
int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer,
u32 bufferlen, u64 requestid,
enum vmbus_packet_type type, u32 flags)
{
struct vmpacket_descriptor desc;
u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen;
u32 packetlen_aligned = ALIGN(packetlen, sizeof(u64));
struct kvec bufferlist[3];
u64 aligned_data = 0;
int num_vecs = ((bufferlen != 0) ? 3 : 1);
/* Setup the descriptor */
desc.type = type; /* VmbusPacketTypeDataInBand; */
desc.flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */
/* in 8-bytes granularity */
desc.offset8 = sizeof(struct vmpacket_descriptor) >> 3;
desc.len8 = (u16)(packetlen_aligned >> 3);
desc.trans_id = requestid;
bufferlist[0].iov_base = &desc;
bufferlist[0].iov_len = sizeof(struct vmpacket_descriptor);
bufferlist[1].iov_base = buffer;
bufferlist[1].iov_len = bufferlen;
bufferlist[2].iov_base = &aligned_data;
bufferlist[2].iov_len = (packetlen_aligned - packetlen);
return hv_ringbuffer_write(channel, bufferlist, num_vecs);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 87 | 42.86% | 1 | 5.56% |
| K. Y. Srinivasan | 54 | 26.60% | 4 | 22.22% |
| Haiyang Zhang | 31 | 15.27% | 2 | 11.11% |
| Greg Kroah-Hartman | 23 | 11.33% | 7 | 38.89% |
| Bill Pemberton | 3 | 1.48% | 1 | 5.56% |
| Nicolas Palix | 3 | 1.48% | 1 | 5.56% |
| Stephen Hemminger | 1 | 0.49% | 1 | 5.56% |
| Uwe Kleine-König | 1 | 0.49% | 1 | 5.56% |
| Total | 203 | 100.00% | 18 | 100.00% |
EXPORT_SYMBOL(vmbus_sendpacket);
/*
* vmbus_sendpacket_pagebuffer - Send a range of single-page buffer
* packets using a GPADL Direct packet type. This interface allows you
* to control notifying the host. This will be useful for sending
* batched data. Also the sender can control the send flags
* explicitly.
*/
int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
struct hv_page_buffer pagebuffers[],
u32 pagecount, void *buffer, u32 bufferlen,
u64 requestid)
{
int i;
struct vmbus_channel_packet_page_buffer desc;
u32 descsize;
u32 packetlen;
u32 packetlen_aligned;
struct kvec bufferlist[3];
u64 aligned_data = 0;
if (pagecount > MAX_PAGE_BUFFER_COUNT)
return -EINVAL;
/*
* Adjust the size down since vmbus_channel_packet_page_buffer is the
* largest size we support
*/
descsize = sizeof(struct vmbus_channel_packet_page_buffer) -
((MAX_PAGE_BUFFER_COUNT - pagecount) *
sizeof(struct hv_page_buffer));
packetlen = descsize + bufferlen;
packetlen_aligned = ALIGN(packetlen, sizeof(u64));
/* Setup the descriptor */
desc.type = VM_PKT_DATA_USING_GPA_DIRECT;
desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
desc.dataoffset8 = descsize >> 3; /* in 8-bytes granularity */
desc.length8 = (u16)(packetlen_aligned >> 3);
desc.transactionid = requestid;
desc.reserved = 0;
desc.rangecount = pagecount;
for (i = 0; i < pagecount; i++) {
desc.range[i].len = pagebuffers[i].len;
desc.range[i].offset = pagebuffers[i].offset;
desc.range[i].pfn = pagebuffers[i].pfn;
}
bufferlist[0].iov_base = &desc;
bufferlist[0].iov_len = descsize;
bufferlist[1].iov_base = buffer;
bufferlist[1].iov_len = bufferlen;
bufferlist[2].iov_base = &aligned_data;
bufferlist[2].iov_len = (packetlen_aligned - packetlen);
return hv_ringbuffer_write(channel, bufferlist, 3);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 157 | 53.58% | 1 | 4.55% |
| Haiyang Zhang | 57 | 19.45% | 4 | 18.18% |
| K. Y. Srinivasan | 38 | 12.97% | 3 | 13.64% |
| Greg Kroah-Hartman | 17 | 5.80% | 6 | 27.27% |
| Bill Pemberton | 11 | 3.75% | 3 | 13.64% |
| Stephen Hemminger | 9 | 3.07% | 3 | 13.64% |
| Nicolas Palix | 3 | 1.02% | 1 | 4.55% |
| Uwe Kleine-König | 1 | 0.34% | 1 | 4.55% |
| Total | 293 | 100.00% | 22 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer);
/*
* vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet
* using a GPADL Direct packet type.
* The buffer includes the vmbus descriptor.
*/
int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
struct vmbus_packet_mpb_array *desc,
u32 desc_size,
void *buffer, u32 bufferlen, u64 requestid)
{
u32 packetlen;
u32 packetlen_aligned;
struct kvec bufferlist[3];
u64 aligned_data = 0;
packetlen = desc_size + bufferlen;
packetlen_aligned = ALIGN(packetlen, sizeof(u64));
/* Setup the descriptor */
desc->type = VM_PKT_DATA_USING_GPA_DIRECT;
desc->flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED;
desc->dataoffset8 = desc_size >> 3; /* in 8-bytes granularity */
desc->length8 = (u16)(packetlen_aligned >> 3);
desc->transactionid = requestid;
desc->reserved = 0;
desc->rangecount = 1;
bufferlist[0].iov_base = desc;
bufferlist[0].iov_len = desc_size;
bufferlist[1].iov_base = buffer;
bufferlist[1].iov_len = bufferlen;
bufferlist[2].iov_base = &aligned_data;
bufferlist[2].iov_len = (packetlen_aligned - packetlen);
return hv_ringbuffer_write(channel, bufferlist, 3);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| K. Y. Srinivasan | 179 | 96.24% | 2 | 50.00% |
| Stephen Hemminger | 7 | 3.76% | 2 | 50.00% |
| Total | 186 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_sendpacket_mpb_desc);
/**
* vmbus_recvpacket() - Retrieve the user packet on the specified channel
* @channel: Pointer to vmbus_channel structure.
* @buffer: Pointer to the buffer you want to receive the data into.
* @bufferlen: Maximum size of what the the buffer will hold
* @buffer_actual_len: The actual size of the data after it was received
* @requestid: Identifier of the request
*
* Receives directly from the hyper-v vmbus and puts the data it received
* into Buffer. This will receive the data unparsed from hyper-v.
*
* Mainly used by Hyper-V drivers.
*/
static inline int
__vmbus_recvpacket(struct vmbus_channel *channel, void *buffer,
u32 bufferlen, u32 *buffer_actual_len, u64 *requestid,
bool raw)
{
return hv_ringbuffer_read(channel, buffer, bufferlen,
buffer_actual_len, requestid, raw);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 14 | 30.43% | 1 | 8.33% |
| Vitaly Kuznetsov | 13 | 28.26% | 2 | 16.67% |
| Greg Kroah-Hartman | 8 | 17.39% | 5 | 41.67% |
| Haiyang Zhang | 7 | 15.22% | 1 | 8.33% |
| K. Y. Srinivasan | 4 | 8.70% | 3 | 25.00% |
| Total | 46 | 100.00% | 12 | 100.00% |
int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer,
u32 bufferlen, u32 *buffer_actual_len,
u64 *requestid)
{
return __vmbus_recvpacket(channel, buffer, bufferlen,
buffer_actual_len, requestid, false);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vitaly Kuznetsov | 39 | 95.12% | 1 | 50.00% |
| Hank Janssen | 2 | 4.88% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(vmbus_recvpacket);
/*
* vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel
*/
int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer,
u32 bufferlen, u32 *buffer_actual_len,
u64 *requestid)
{
return __vmbus_recvpacket(channel, buffer, bufferlen,
buffer_actual_len, requestid, true);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 19 | 46.34% | 1 | 11.11% |
| Haiyang Zhang | 8 | 19.51% | 2 | 22.22% |
| Greg Kroah-Hartman | 7 | 17.07% | 4 | 44.44% |
| Vitaly Kuznetsov | 6 | 14.63% | 1 | 11.11% |
| K. Y. Srinivasan | 1 | 2.44% | 1 | 11.11% |
| Total | 41 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hank Janssen | 1153 | 32.72% | 3 | 2.29% |
| K. Y. Srinivasan | 928 | 26.33% | 43 | 32.82% |
| Haiyang Zhang | 478 | 13.56% | 12 | 9.16% |
| Greg Kroah-Hartman | 329 | 9.34% | 26 | 19.85% |
| Vitaly Kuznetsov | 253 | 7.18% | 16 | 12.21% |
| Bill Pemberton | 209 | 5.93% | 13 | 9.92% |
| Dexuan Cui | 122 | 3.46% | 6 | 4.58% |
| Stephen Hemminger | 31 | 0.88% | 6 | 4.58% |
| Vasiliy Kulikov | 8 | 0.23% | 1 | 0.76% |
| Nicolas Palix | 6 | 0.17% | 1 | 0.76% |
| Tejun Heo | 3 | 0.09% | 1 | 0.76% |
| Uwe Kleine-König | 2 | 0.06% | 1 | 0.76% |
| Olaf Hering | 1 | 0.03% | 1 | 0.76% |
| Masahiro Yamada | 1 | 0.03% | 1 | 0.76% |
| Total | 3524 | 100.00% | 131 | 100.00% |
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