diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-01-07 01:52:21 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-02-01 17:26:47 +0300 |
| commit | d25cc43c6775bff6b8e3dad97c747954b805e421 (patch) | |
| tree | 92029ddc6e84b3ff4e2e2d0c66a77067e2d1fba4 | |
| parent | 09f332a589232f524b579ba4319433dcc7c0ed32 (diff) | |
| download | linux-d25cc43c6775bff6b8e3dad97c747954b805e421.tar.xz | |
vhost: don't hold onto file pointer for VHOST_SET_LOG_FD
We already hold a reference to the eventfd_ctx, which is sufficient;
there's no need to hold a reference to the struct file as well. So get
rid of vhost_dev->log_file.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
| -rw-r--r-- | drivers/vhost/vhost.c | 24 | ||||
| -rw-r--r-- | drivers/vhost/vhost.h | 1 |
2 files changed, 5 insertions, 20 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 40a72d15361f..66775446248a 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -419,7 +419,6 @@ void vhost_dev_init(struct vhost_dev *dev, dev->nvqs = nvqs; mutex_init(&dev->mutex); dev->log_ctx = NULL; - dev->log_file = NULL; dev->umem = NULL; dev->iotlb = NULL; dev->mm = NULL; @@ -625,9 +624,6 @@ void vhost_dev_cleanup(struct vhost_dev *dev) if (dev->log_ctx) eventfd_ctx_put(dev->log_ctx); dev->log_ctx = NULL; - if (dev->log_file) - fput(dev->log_file); - dev->log_file = NULL; /* No one will access memory at this point */ vhost_umem_clean(dev->umem); dev->umem = NULL; @@ -1572,8 +1568,7 @@ EXPORT_SYMBOL_GPL(vhost_init_device_iotlb); /* Caller must have device mutex */ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) { - struct file *eventfp, *filep = NULL; - struct eventfd_ctx *ctx = NULL; + struct eventfd_ctx *ctx; u64 p; long r; int i, fd; @@ -1619,19 +1614,12 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) r = get_user(fd, (int __user *)argp); if (r < 0) break; - eventfp = fd == -1 ? NULL : eventfd_fget(fd); - if (IS_ERR(eventfp)) { - r = PTR_ERR(eventfp); + ctx = fd == -1 ? NULL : eventfd_ctx_fdget(fd); + if (IS_ERR(ctx)) { + r = PTR_ERR(ctx); break; } - if (eventfp != d->log_file) { - filep = d->log_file; - d->log_file = eventfp; - ctx = d->log_ctx; - d->log_ctx = eventfp ? - eventfd_ctx_fileget(eventfp) : NULL; - } else - filep = eventfp; + swap(ctx, d->log_ctx); for (i = 0; i < d->nvqs; ++i) { mutex_lock(&d->vqs[i]->mutex); d->vqs[i]->log_ctx = d->log_ctx; @@ -1639,8 +1627,6 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) } if (ctx) eventfd_ctx_put(ctx); - if (filep) - fput(filep); break; default: r = -ENOIOCTLCMD; diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index e3c463ce3d48..45d12b01cfe4 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -157,7 +157,6 @@ struct vhost_dev { struct mutex mutex; struct vhost_virtqueue **vqs; int nvqs; - struct file *log_file; struct eventfd_ctx *log_ctx; struct llist_head work_list; struct task_struct *worker; |