summaryrefslogtreecommitdiff
path: root/drivers/vhost/vhost.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/vhost/vhost.c')
-rw-r--r--drivers/vhost/vhost.c51
1 files changed, 50 insertions, 1 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 4d135b1a861e..e58cf0001cee 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/kthread.h>
#include <linux/cgroup.h>
+#include <linux/module.h>
#include "vhost.h"
@@ -66,6 +67,7 @@ void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn)
work->flushing = 0;
work->queue_seq = work->done_seq = 0;
}
+EXPORT_SYMBOL_GPL(vhost_work_init);
/* Init poll structure */
void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
@@ -79,6 +81,7 @@ void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
vhost_work_init(&poll->work, fn);
}
+EXPORT_SYMBOL_GPL(vhost_poll_init);
/* Start polling a file. We add ourselves to file's wait queue. The caller must
* keep a reference to a file until after vhost_poll_stop is called. */
@@ -101,6 +104,7 @@ int vhost_poll_start(struct vhost_poll *poll, struct file *file)
return ret;
}
+EXPORT_SYMBOL_GPL(vhost_poll_start);
/* Stop polling a file. After this function returns, it becomes safe to drop the
* file reference. You must also flush afterwards. */
@@ -111,6 +115,7 @@ void vhost_poll_stop(struct vhost_poll *poll)
poll->wqh = NULL;
}
}
+EXPORT_SYMBOL_GPL(vhost_poll_stop);
static bool vhost_work_seq_done(struct vhost_dev *dev, struct vhost_work *work,
unsigned seq)
@@ -123,7 +128,7 @@ static bool vhost_work_seq_done(struct vhost_dev *dev, struct vhost_work *work,
return left <= 0;
}
-static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work)
+void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work)
{
unsigned seq;
int flushing;
@@ -138,6 +143,7 @@ static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work)
spin_unlock_irq(&dev->work_lock);
BUG_ON(flushing < 0);
}
+EXPORT_SYMBOL_GPL(vhost_work_flush);
/* Flush any work that has been scheduled. When calling this, don't hold any
* locks that are also used by the callback. */
@@ -145,6 +151,7 @@ void vhost_poll_flush(struct vhost_poll *poll)
{
vhost_work_flush(poll->dev, &poll->work);
}
+EXPORT_SYMBOL_GPL(vhost_poll_flush);
void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
{
@@ -158,11 +165,13 @@ void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work)
}
spin_unlock_irqrestore(&dev->work_lock, flags);
}
+EXPORT_SYMBOL_GPL(vhost_work_queue);
void vhost_poll_queue(struct vhost_poll *poll)
{
vhost_work_queue(poll->dev, &poll->work);
}
+EXPORT_SYMBOL_GPL(vhost_poll_queue);
static void vhost_vq_reset(struct vhost_dev *dev,
struct vhost_virtqueue *vq)
@@ -311,6 +320,7 @@ long vhost_dev_init(struct vhost_dev *dev,
return 0;
}
+EXPORT_SYMBOL_GPL(vhost_dev_init);
/* Caller should have device mutex */
long vhost_dev_check_owner(struct vhost_dev *dev)
@@ -318,6 +328,7 @@ long vhost_dev_check_owner(struct vhost_dev *dev)
/* Are you the owner? If not, I don't think you mean to do that */
return dev->mm == current->mm ? 0 : -EPERM;
}
+EXPORT_SYMBOL_GPL(vhost_dev_check_owner);
struct vhost_attach_cgroups_struct {
struct vhost_work work;
@@ -349,6 +360,7 @@ bool vhost_dev_has_owner(struct vhost_dev *dev)
{
return dev->mm;
}
+EXPORT_SYMBOL_GPL(vhost_dev_has_owner);
/* Caller should have device mutex */
long vhost_dev_set_owner(struct vhost_dev *dev)
@@ -392,11 +404,13 @@ err_worker:
err_mm:
return err;
}
+EXPORT_SYMBOL_GPL(vhost_dev_set_owner);
struct vhost_memory *vhost_dev_reset_owner_prepare(void)
{
return kmalloc(offsetof(struct vhost_memory, regions), GFP_KERNEL);
}
+EXPORT_SYMBOL_GPL(vhost_dev_reset_owner_prepare);
/* Caller should have device mutex */
void vhost_dev_reset_owner(struct vhost_dev *dev, struct vhost_memory *memory)
@@ -407,6 +421,7 @@ void vhost_dev_reset_owner(struct vhost_dev *dev, struct vhost_memory *memory)
memory->nregions = 0;
RCU_INIT_POINTER(dev->memory, memory);
}
+EXPORT_SYMBOL_GPL(vhost_dev_reset_owner);
void vhost_dev_stop(struct vhost_dev *dev)
{
@@ -419,6 +434,7 @@ void vhost_dev_stop(struct vhost_dev *dev)
}
}
}
+EXPORT_SYMBOL_GPL(vhost_dev_stop);
/* Caller should have device mutex if and only if locked is set */
void vhost_dev_cleanup(struct vhost_dev *dev, bool locked)
@@ -459,6 +475,7 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked)
mmput(dev->mm);
dev->mm = NULL;
}
+EXPORT_SYMBOL_GPL(vhost_dev_cleanup);
static int log_access_ok(void __user *log_base, u64 addr, unsigned long sz)
{
@@ -544,6 +561,7 @@ int vhost_log_access_ok(struct vhost_dev *dev)
lockdep_is_held(&dev->mutex));
return memory_access_ok(dev, mp, 1);
}
+EXPORT_SYMBOL_GPL(vhost_log_access_ok);
/* Verify access for write logging. */
/* Caller should have vq mutex and device mutex */
@@ -569,6 +587,7 @@ int vhost_vq_access_ok(struct vhost_virtqueue *vq)
return vq_access_ok(vq->dev, vq->num, vq->desc, vq->avail, vq->used) &&
vq_log_access_ok(vq->dev, vq, vq->log_base);
}
+EXPORT_SYMBOL_GPL(vhost_vq_access_ok);
static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m)
{
@@ -798,6 +817,7 @@ long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp)
vhost_poll_flush(&vq->poll);
return r;
}
+EXPORT_SYMBOL_GPL(vhost_vring_ioctl);
/* Caller must have device mutex */
long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
@@ -878,6 +898,7 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
done:
return r;
}
+EXPORT_SYMBOL_GPL(vhost_dev_ioctl);
static const struct vhost_memory_region *find_region(struct vhost_memory *mem,
__u64 addr, __u32 len)
@@ -969,6 +990,7 @@ int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
BUG();
return 0;
}
+EXPORT_SYMBOL_GPL(vhost_log_write);
static int vhost_update_used_flags(struct vhost_virtqueue *vq)
{
@@ -1020,6 +1042,7 @@ int vhost_init_used(struct vhost_virtqueue *vq)
vq->signalled_used_valid = false;
return get_user(vq->last_used_idx, &vq->used->idx);
}
+EXPORT_SYMBOL_GPL(vhost_init_used);
static int translate_desc(struct vhost_dev *dev, u64 addr, u32 len,
struct iovec iov[], int iov_size)
@@ -1296,12 +1319,14 @@ int vhost_get_vq_desc(struct vhost_dev *dev, struct vhost_virtqueue *vq,
BUG_ON(!(vq->used_flags & VRING_USED_F_NO_NOTIFY));
return head;
}
+EXPORT_SYMBOL_GPL(vhost_get_vq_desc);
/* Reverse the effect of vhost_get_vq_desc. Useful for error handling. */
void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n)
{
vq->last_avail_idx -= n;
}
+EXPORT_SYMBOL_GPL(vhost_discard_vq_desc);
/* After we've used one of their buffers, we tell them about it. We'll then
* want to notify the guest, using eventfd. */
@@ -1350,6 +1375,7 @@ int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)
vq->signalled_used_valid = false;
return 0;
}
+EXPORT_SYMBOL_GPL(vhost_add_used);
static int __vhost_add_used_n(struct vhost_virtqueue *vq,
struct vring_used_elem *heads,
@@ -1419,6 +1445,7 @@ int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads,
}
return r;
}
+EXPORT_SYMBOL_GPL(vhost_add_used_n);
static bool vhost_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
{
@@ -1463,6 +1490,7 @@ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
if (vq->call_ctx && vhost_notify(dev, vq))
eventfd_signal(vq->call_ctx, 1);
}
+EXPORT_SYMBOL_GPL(vhost_signal);
/* And here's the combo meal deal. Supersize me! */
void vhost_add_used_and_signal(struct vhost_dev *dev,
@@ -1472,6 +1500,7 @@ void vhost_add_used_and_signal(struct vhost_dev *dev,
vhost_add_used(vq, head, len);
vhost_signal(dev, vq);
}
+EXPORT_SYMBOL_GPL(vhost_add_used_and_signal);
/* multi-buffer version of vhost_add_used_and_signal */
void vhost_add_used_and_signal_n(struct vhost_dev *dev,
@@ -1481,6 +1510,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *dev,
vhost_add_used_n(vq, heads, count);
vhost_signal(dev, vq);
}
+EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n);
/* OK, now we need to know about added descriptors. */
bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
@@ -1518,6 +1548,7 @@ bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
return avail_idx != vq->avail_idx;
}
+EXPORT_SYMBOL_GPL(vhost_enable_notify);
/* We don't need to be notified again. */
void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
@@ -1534,3 +1565,21 @@ void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
&vq->used->flags, r);
}
}
+EXPORT_SYMBOL_GPL(vhost_disable_notify);
+
+static int __init vhost_init(void)
+{
+ return 0;
+}
+
+static void __exit vhost_exit(void)
+{
+}
+
+module_init(vhost_init);
+module_exit(vhost_exit);
+
+MODULE_VERSION("0.0.1");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Michael S. Tsirkin");
+MODULE_DESCRIPTION("Host kernel accelerator for virtio");