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virtio, vhost: features, fixes, cleanups

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discard in virtio blk
 misc fixes and cleanups
 
 Signed-off-by: Michael S. Tsirkin <[email protected]>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost updates from Michael Tsirkin:
"Features, fixes, cleanups:

   - discard in virtio blk

   - misc fixes and cleanups"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost: correct the related warning message
  vhost: split structs into a separate header file
  virtio: remove deprecated VIRTIO_PCI_CONFIG()
  vhost/vsock: switch to a mutex for vhost_vsock_hash
  virtio_blk: add discard and write zeroes support
This commit is contained in:
Linus Torvalds 2019-01-02 18:54:45 -08:00
commit d548e65904
7 changed files with 279 additions and 125 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/vhost/scsi.c
View file

@ -884,7 +884,7 @@ vhost_scsi_get_req(struct vhost_virtqueue *vq, struct vhost_scsi_ctx *vc,
if (unlikely(!copy_from_iter_full(vc->req, vc->req_size,
&vc->out_iter))) {
vq_err(vq, "Faulted on copy_from_iter\n");
vq_err(vq, "Faulted on copy_from_iter_full\n");
} else if (unlikely(*vc->lunp != 1)) {
/* virtio-scsi spec requires byte 0 of the lun to be 1 */
vq_err(vq, "Illegal virtio-scsi lun: %u\n", *vc->lunp);
@ -1436,7 +1436,7 @@ vhost_scsi_set_endpoint(struct vhost_scsi *vs,
se_tpg = &tpg->se_tpg;
ret = target_depend_item(&se_tpg->tpg_group.cg_item);
if (ret) {
pr_warn("configfs_depend_item() failed: %d\n", ret);
pr_warn("target_depend_item() failed: %d\n", ret);
kfree(vs_tpg);
mutex_unlock(&tpg->tv_tpg_mutex);
goto out;

16
drivers/vhost/vsock.c
View file

@ -27,14 +27,14 @@ enum {
};
/* Used to track all the vhost_vsock instances on the system. */
static DEFINE_SPINLOCK(vhost_vsock_lock);
static DEFINE_MUTEX(vhost_vsock_mutex);
static DEFINE_READ_MOSTLY_HASHTABLE(vhost_vsock_hash, 8);
struct vhost_vsock {
struct vhost_dev dev;
struct vhost_virtqueue vqs[2];
/* Link to global vhost_vsock_hash, writes use vhost_vsock_lock */
/* Link to global vhost_vsock_hash, writes use vhost_vsock_mutex */
struct hlist_node hash;
struct vhost_work send_pkt_work;
@ -51,7 +51,7 @@ static u32 vhost_transport_get_local_cid(void)
return VHOST_VSOCK_DEFAULT_HOST_CID;
}
/* Callers that dereference the return value must hold vhost_vsock_lock or the
/* Callers that dereference the return value must hold vhost_vsock_mutex or the
* RCU read lock.
*/
static struct vhost_vsock *vhost_vsock_get(u32 guest_cid)
@ -584,10 +584,10 @@ static int vhost_vsock_dev_release(struct inode *inode, struct file *file)
{
struct vhost_vsock *vsock = file->private_data;
spin_lock_bh(&vhost_vsock_lock);
mutex_lock(&vhost_vsock_mutex);
if (vsock->guest_cid)
hash_del_rcu(&vsock->hash);
spin_unlock_bh(&vhost_vsock_lock);
mutex_unlock(&vhost_vsock_mutex);
/* Wait for other CPUs to finish using vsock */
synchronize_rcu();
@ -631,10 +631,10 @@ static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid)
return -EINVAL;
/* Refuse if CID is already in use */
spin_lock_bh(&vhost_vsock_lock);
mutex_lock(&vhost_vsock_mutex);
other = vhost_vsock_get(guest_cid);
if (other && other != vsock) {
spin_unlock_bh(&vhost_vsock_lock);
mutex_unlock(&vhost_vsock_mutex);
return -EADDRINUSE;
}
@ -643,7 +643,7 @@ static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid)
vsock->guest_cid = guest_cid;
hash_add_rcu(vhost_vsock_hash, &vsock->hash, guest_cid);
spin_unlock_bh(&vhost_vsock_lock);
mutex_unlock(&vhost_vsock_mutex);
return 0;
}