提交 f73f047d 编写于 作者: L Linus Torvalds

Merge tag 'for-linus-4.16a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - fixes for the Xen pvcalls frontend driver

 - fix for booting Xen pv domains

 - fix for the xenbus driver user interface

* tag 'for-linus-4.16a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  pvcalls-front: wait for other operations to return when release passive sockets
  pvcalls-front: introduce a per sock_mapping refcount
  x86/xen: Calculate __max_logical_packages on PV domains
  xenbus: track caller request id
......@@ -129,6 +129,7 @@ static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
void cpu_disable_common(void);
void native_smp_prepare_boot_cpu(void);
void native_smp_prepare_cpus(unsigned int max_cpus);
void calculate_max_logical_packages(void);
void native_smp_cpus_done(unsigned int max_cpus);
void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
......
......@@ -1281,11 +1281,10 @@ void __init native_smp_prepare_boot_cpu(void)
cpu_set_state_online(me);
}
void __init native_smp_cpus_done(unsigned int max_cpus)
void __init calculate_max_logical_packages(void)
{
int ncpus;
pr_debug("Boot done\n");
/*
* Today neither Intel nor AMD support heterogenous systems so
* extrapolate the boot cpu's data to all packages.
......@@ -1293,6 +1292,13 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
ncpus = cpu_data(0).booted_cores * topology_max_smt_threads();
__max_logical_packages = DIV_ROUND_UP(nr_cpu_ids, ncpus);
pr_info("Max logical packages: %u\n", __max_logical_packages);
}
void __init native_smp_cpus_done(unsigned int max_cpus)
{
pr_debug("Boot done\n");
calculate_max_logical_packages();
if (x86_has_numa_in_package)
set_sched_topology(x86_numa_in_package_topology);
......
......@@ -122,6 +122,8 @@ void __init xen_smp_cpus_done(unsigned int max_cpus)
if (xen_hvm_domain())
native_smp_cpus_done(max_cpus);
else
calculate_max_logical_packages();
if (xen_have_vcpu_info_placement)
return;
......
......@@ -60,6 +60,7 @@ struct sock_mapping {
bool active_socket;
struct list_head list;
struct socket *sock;
atomic_t refcount;
union {
struct {
int irq;
......@@ -93,6 +94,32 @@ struct sock_mapping {
};
};
static inline struct sock_mapping *pvcalls_enter_sock(struct socket *sock)
{
struct sock_mapping *map;
if (!pvcalls_front_dev ||
dev_get_drvdata(&pvcalls_front_dev->dev) == NULL)
return ERR_PTR(-ENOTCONN);
map = (struct sock_mapping *)sock->sk->sk_send_head;
if (map == NULL)
return ERR_PTR(-ENOTSOCK);
pvcalls_enter();
atomic_inc(&map->refcount);
return map;
}
static inline void pvcalls_exit_sock(struct socket *sock)
{
struct sock_mapping *map;
map = (struct sock_mapping *)sock->sk->sk_send_head;
atomic_dec(&map->refcount);
pvcalls_exit();
}
static inline int get_request(struct pvcalls_bedata *bedata, int *req_id)
{
*req_id = bedata->ring.req_prod_pvt & (RING_SIZE(&bedata->ring) - 1);
......@@ -369,31 +396,23 @@ int pvcalls_front_connect(struct socket *sock, struct sockaddr *addr,
if (addr->sa_family != AF_INET || sock->type != SOCK_STREAM)
return -EOPNOTSUPP;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -ENOTCONN;
}
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return PTR_ERR(map);
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *)sock->sk->sk_send_head;
if (!map) {
pvcalls_exit();
return -ENOTSOCK;
}
spin_lock(&bedata->socket_lock);
ret = get_request(bedata, &req_id);
if (ret < 0) {
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
ret = create_active(map, &evtchn);
if (ret < 0) {
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
......@@ -423,7 +442,7 @@ int pvcalls_front_connect(struct socket *sock, struct sockaddr *addr,
smp_rmb();
ret = bedata->rsp[req_id].ret;
bedata->rsp[req_id].req_id = PVCALLS_INVALID_ID;
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
......@@ -488,23 +507,15 @@ int pvcalls_front_sendmsg(struct socket *sock, struct msghdr *msg,
if (flags & (MSG_CONFIRM|MSG_DONTROUTE|MSG_EOR|MSG_OOB))
return -EOPNOTSUPP;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -ENOTCONN;
}
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return PTR_ERR(map);
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (!map) {
pvcalls_exit();
return -ENOTSOCK;
}
mutex_lock(&map->active.out_mutex);
if ((flags & MSG_DONTWAIT) && !pvcalls_front_write_todo(map)) {
mutex_unlock(&map->active.out_mutex);
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EAGAIN;
}
if (len > INT_MAX)
......@@ -526,7 +537,7 @@ int pvcalls_front_sendmsg(struct socket *sock, struct msghdr *msg,
tot_sent = sent;
mutex_unlock(&map->active.out_mutex);
pvcalls_exit();
pvcalls_exit_sock(sock);
return tot_sent;
}
......@@ -591,19 +602,11 @@ int pvcalls_front_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (flags & (MSG_CMSG_CLOEXEC|MSG_ERRQUEUE|MSG_OOB|MSG_TRUNC))
return -EOPNOTSUPP;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -ENOTCONN;
}
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return PTR_ERR(map);
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (!map) {
pvcalls_exit();
return -ENOTSOCK;
}
mutex_lock(&map->active.in_mutex);
if (len > XEN_FLEX_RING_SIZE(PVCALLS_RING_ORDER))
len = XEN_FLEX_RING_SIZE(PVCALLS_RING_ORDER);
......@@ -623,7 +626,7 @@ int pvcalls_front_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
ret = 0;
mutex_unlock(&map->active.in_mutex);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
......@@ -637,24 +640,16 @@ int pvcalls_front_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
if (addr->sa_family != AF_INET || sock->type != SOCK_STREAM)
return -EOPNOTSUPP;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -ENOTCONN;
}
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return PTR_ERR(map);
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (map == NULL) {
pvcalls_exit();
return -ENOTSOCK;
}
spin_lock(&bedata->socket_lock);
ret = get_request(bedata, &req_id);
if (ret < 0) {
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
req = RING_GET_REQUEST(&bedata->ring, req_id);
......@@ -684,7 +679,7 @@ int pvcalls_front_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
bedata->rsp[req_id].req_id = PVCALLS_INVALID_ID;
map->passive.status = PVCALLS_STATUS_BIND;
pvcalls_exit();
pvcalls_exit_sock(sock);
return 0;
}
......@@ -695,21 +690,13 @@ int pvcalls_front_listen(struct socket *sock, int backlog)
struct xen_pvcalls_request *req;
int notify, req_id, ret;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -ENOTCONN;
}
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return PTR_ERR(map);
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (!map) {
pvcalls_exit();
return -ENOTSOCK;
}
if (map->passive.status != PVCALLS_STATUS_BIND) {
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EOPNOTSUPP;
}
......@@ -717,7 +704,7 @@ int pvcalls_front_listen(struct socket *sock, int backlog)
ret = get_request(bedata, &req_id);
if (ret < 0) {
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
req = RING_GET_REQUEST(&bedata->ring, req_id);
......@@ -741,7 +728,7 @@ int pvcalls_front_listen(struct socket *sock, int backlog)
bedata->rsp[req_id].req_id = PVCALLS_INVALID_ID;
map->passive.status = PVCALLS_STATUS_LISTEN;
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
......@@ -753,21 +740,13 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
struct xen_pvcalls_request *req;
int notify, req_id, ret, evtchn, nonblock;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -ENOTCONN;
}
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return PTR_ERR(map);
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (!map) {
pvcalls_exit();
return -ENOTSOCK;
}
if (map->passive.status != PVCALLS_STATUS_LISTEN) {
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EINVAL;
}
......@@ -785,13 +764,13 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
goto received;
}
if (nonblock) {
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EAGAIN;
}
if (wait_event_interruptible(map->passive.inflight_accept_req,
!test_and_set_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT,
(void *)&map->passive.flags))) {
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EINTR;
}
}
......@@ -802,7 +781,7 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
clear_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT,
(void *)&map->passive.flags);
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
map2 = kzalloc(sizeof(*map2), GFP_ATOMIC);
......@@ -810,7 +789,7 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
clear_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT,
(void *)&map->passive.flags);
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return -ENOMEM;
}
ret = create_active(map2, &evtchn);
......@@ -819,7 +798,7 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
clear_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT,
(void *)&map->passive.flags);
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
list_add_tail(&map2->list, &bedata->socket_mappings);
......@@ -841,13 +820,13 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
/* We could check if we have received a response before returning. */
if (nonblock) {
WRITE_ONCE(map->passive.inflight_req_id, req_id);
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EAGAIN;
}
if (wait_event_interruptible(bedata->inflight_req,
READ_ONCE(bedata->rsp[req_id].req_id) == req_id)) {
pvcalls_exit();
pvcalls_exit_sock(sock);
return -EINTR;
}
/* read req_id, then the content */
......@@ -862,7 +841,7 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
clear_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT,
(void *)&map->passive.flags);
pvcalls_front_free_map(bedata, map2);
pvcalls_exit();
pvcalls_exit_sock(sock);
return -ENOMEM;
}
newsock->sk->sk_send_head = (void *)map2;
......@@ -874,7 +853,7 @@ int pvcalls_front_accept(struct socket *sock, struct socket *newsock, int flags)
clear_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT, (void *)&map->passive.flags);
wake_up(&map->passive.inflight_accept_req);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
......@@ -965,23 +944,16 @@ __poll_t pvcalls_front_poll(struct file *file, struct socket *sock,
struct sock_mapping *map;
__poll_t ret;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
map = pvcalls_enter_sock(sock);
if (IS_ERR(map))
return EPOLLNVAL;
}
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (!map) {
pvcalls_exit();
return EPOLLNVAL;
}
if (map->active_socket)
ret = pvcalls_front_poll_active(file, bedata, map, wait);
else
ret = pvcalls_front_poll_passive(file, bedata, map, wait);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
......@@ -995,25 +967,20 @@ int pvcalls_front_release(struct socket *sock)
if (sock->sk == NULL)
return 0;
pvcalls_enter();
if (!pvcalls_front_dev) {
pvcalls_exit();
return -EIO;
map = pvcalls_enter_sock(sock);
if (IS_ERR(map)) {
if (PTR_ERR(map) == -ENOTCONN)
return -EIO;
else
return 0;
}
bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
map = (struct sock_mapping *) sock->sk->sk_send_head;
if (map == NULL) {
pvcalls_exit();
return 0;
}
spin_lock(&bedata->socket_lock);
ret = get_request(bedata, &req_id);
if (ret < 0) {
spin_unlock(&bedata->socket_lock);
pvcalls_exit();
pvcalls_exit_sock(sock);
return ret;
}
sock->sk->sk_send_head = NULL;
......@@ -1043,14 +1010,20 @@ int pvcalls_front_release(struct socket *sock)
/*
* We need to make sure that sendmsg/recvmsg on this socket have
* not started before we've cleared sk_send_head here. The
* easiest (though not optimal) way to guarantee this is to see
* that no pvcall (other than us) is in progress.
* easiest way to guarantee this is to see that no pvcalls
* (other than us) is in progress on this socket.
*/
while (atomic_read(&pvcalls_refcount) > 1)
while (atomic_read(&map->refcount) > 1)
cpu_relax();
pvcalls_front_free_map(bedata, map);
} else {
wake_up(&bedata->inflight_req);
wake_up(&map->passive.inflight_accept_req);
while (atomic_read(&map->refcount) > 1)
cpu_relax();
spin_lock(&bedata->socket_lock);
list_del(&map->list);
spin_unlock(&bedata->socket_lock);
......
......@@ -76,6 +76,7 @@ struct xb_req_data {
struct list_head list;
wait_queue_head_t wq;
struct xsd_sockmsg msg;
uint32_t caller_req_id;
enum xsd_sockmsg_type type;
char *body;
const struct kvec *vec;
......
......@@ -309,6 +309,7 @@ static int process_msg(void)
goto out;
if (req->state == xb_req_state_wait_reply) {
req->msg.req_id = req->caller_req_id;
req->msg.type = state.msg.type;
req->msg.len = state.msg.len;
req->body = state.body;
......
......@@ -227,6 +227,8 @@ static void xs_send(struct xb_req_data *req, struct xsd_sockmsg *msg)
req->state = xb_req_state_queued;
init_waitqueue_head(&req->wq);
/* Save the caller req_id and restore it later in the reply */
req->caller_req_id = req->msg.req_id;
req->msg.req_id = xs_request_enter(req);
mutex_lock(&xb_write_mutex);
......@@ -310,6 +312,7 @@ static void *xs_talkv(struct xenbus_transaction t,
req->num_vecs = num_vecs;
req->cb = xs_wake_up;
msg.req_id = 0;
msg.tx_id = t.id;
msg.type = type;
msg.len = 0;
......
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