From: Xie Yongji <xieyongji@bytedance.com>
To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com,
sgarzare@redhat.com, parav@nvidia.com, akpm@linux-foundation.org,
rdunlap@infradead.org, willy@infradead.org,
viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org,
corbet@lwn.net
Cc: virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Subject: [RFC v2 10/13] vduse: grab the module's references until there is no vduse device
Date: Tue, 22 Dec 2020 22:52:18 +0800 [thread overview]
Message-ID: <20201222145221.711-11-xieyongji@bytedance.com> (raw)
In-Reply-To: <20201222145221.711-1-xieyongji@bytedance.com>
The module should not be unloaded if any vduse device exists.
So increase the module's reference count when creating vduse
device. And the reference count is kept until the device is
destroyed.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
---
drivers/vdpa/vdpa_user/vduse_dev.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index d24aaacb6008..c29b24a7e7e9 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -1052,6 +1052,7 @@ static int vduse_destroy_dev(u32 id)
kfree(dev->vqs);
vduse_iova_domain_destroy(dev->domain);
vduse_dev_destroy(dev);
+ module_put(THIS_MODULE);
return 0;
}
@@ -1096,6 +1097,7 @@ static int vduse_create_dev(struct vduse_dev_config *config)
refcount_inc(&dev->refcnt);
list_add(&dev->list, &vduse_devs);
+ __module_get(THIS_MODULE);
return fd;
err_fd:
--
2.11.0
next prev parent reply other threads:[~2020-12-22 14:55 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-22 14:52 [RFC v2 00/13] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2020-12-22 14:52 ` [RFC v2 01/13] mm: export zap_page_range() for driver use Xie Yongji
2020-12-22 15:44 ` Christoph Hellwig
2020-12-22 14:52 ` [RFC v2 02/13] eventfd: track eventfd_signal() recursion depth separately in different cases Xie Yongji
2020-12-22 14:52 ` [RFC v2 03/13] eventfd: Increase the recursion depth of eventfd_signal() Xie Yongji
2020-12-22 14:52 ` [RFC v2 04/13] vdpa: Remove the restriction that only supports virtio-net devices Xie Yongji
2020-12-22 14:52 ` [RFC v2 05/13] vdpa: Pass the netlink attributes to ops.dev_add() Xie Yongji
2020-12-22 14:52 ` [RFC v2 06/13] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2020-12-23 8:08 ` Jason Wang
2020-12-23 14:17 ` Yongji Xie
2020-12-24 3:01 ` Jason Wang
2020-12-24 8:34 ` Yongji Xie
2020-12-25 6:59 ` Jason Wang
2021-01-08 13:32 ` Bob Liu
2021-01-10 10:03 ` Yongji Xie
2020-12-22 14:52 ` [RFC v2 07/13] vduse: support get/set virtqueue state Xie Yongji
2020-12-22 14:52 ` [RFC v2 08/13] vdpa: Introduce process_iotlb_msg() in vdpa_config_ops Xie Yongji
2020-12-23 8:36 ` Jason Wang
2020-12-23 11:06 ` Yongji Xie
2020-12-24 2:36 ` Jason Wang
2020-12-24 7:24 ` Yongji Xie
2020-12-22 14:52 ` [RFC v2 09/13] vduse: Add support for processing vhost iotlb message Xie Yongji
2020-12-23 9:05 ` Jason Wang
2020-12-23 12:14 ` [External] " Yongji Xie
2020-12-24 2:41 ` Jason Wang
2020-12-24 7:37 ` Yongji Xie
2020-12-25 2:37 ` Yongji Xie
2020-12-25 7:02 ` Jason Wang
2020-12-25 11:36 ` Yongji Xie
2020-12-25 6:57 ` Jason Wang
2020-12-25 10:31 ` Yongji Xie
2020-12-28 7:43 ` Jason Wang
2020-12-28 8:14 ` Yongji Xie
2020-12-28 8:43 ` Jason Wang
2020-12-28 9:12 ` Yongji Xie
2020-12-29 9:11 ` Jason Wang
2020-12-29 10:26 ` Yongji Xie
2020-12-30 6:10 ` Jason Wang
2020-12-30 7:09 ` Yongji Xie
2020-12-30 8:41 ` Jason Wang
2020-12-30 10:12 ` Yongji Xie
2020-12-31 2:49 ` Jason Wang
2020-12-31 5:15 ` Yongji Xie
2020-12-31 5:49 ` Jason Wang
2020-12-31 6:52 ` Yongji Xie
2020-12-31 7:11 ` Jason Wang
2020-12-31 8:00 ` Yongji Xie
2020-12-22 14:52 ` Xie Yongji [this message]
2020-12-22 14:52 ` [RFC v2 11/13] vduse/iova_domain: Support reclaiming bounce pages Xie Yongji
2020-12-22 14:52 ` [RFC v2 12/13] vduse: Add memory shrinker to reclaim " Xie Yongji
2020-12-22 14:52 ` [RFC v2 13/13] vduse: Introduce a workqueue for irq injection Xie Yongji
2020-12-23 6:38 ` [RFC v2 00/13] Introduce VDUSE - vDPA Device in Userspace Jason Wang
2020-12-23 8:14 ` Jason Wang
2020-12-23 10:59 ` Yongji Xie
2020-12-24 2:24 ` Jason Wang
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