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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

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Pull SCSI target fixes from Nicholas Bellinger:
 "This includes the bug-fix for a >= v3.8-rc1 regression specific to
  iscsi-target persistent reservation conflict handling (CC'ed to
  stable), and a tcm_vhost patch to drop VIRTIO_RING_F_EVENT_IDX usage
  so that in-flight qemu vhost-scsi-pci device code can detect the
  proper vhost feature bits.

  Also, there are two more tcm_vhost patches still being discussed by
  MST and Asias for v3.9 that will be required for the in-flight qemu
  vhost-scsi-pci device patch to function properly, and that should
  (hopefully) be the last target fixes for this round."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  target: Fix RESERVATION_CONFLICT status regression for iscsi-target special case
  tcm_vhost: Avoid VIRTIO_RING_F_EVENT_IDX feature bit
This commit is contained in:
Linus Torvalds 2013-03-30 13:13:05 -07:00
commit 13d2080db3
2 changed files with 14 additions and 3 deletions
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4
drivers/target/target_core_transport.c
View file

@ -1139,8 +1139,10 @@ target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
return ret;
ret = target_check_reservation(cmd);
if (ret)
if (ret) {
cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
return ret;
}
ret = dev->transport->parse_cdb(cmd);
if (ret)

13
drivers/vhost/tcm_vhost.c
View file

@ -60,6 +60,15 @@ enum {
VHOST_SCSI_VQ_IO = 2,
};
/*
* VIRTIO_RING_F_EVENT_IDX seems broken. Not sure the bug is in
* kernel but disabling it helps.
* TODO: debug and remove the workaround.
*/
enum {
VHOST_SCSI_FEATURES = VHOST_FEATURES & (~VIRTIO_RING_F_EVENT_IDX)
};
#define VHOST_SCSI_MAX_TARGET 256
#define VHOST_SCSI_MAX_VQ 128
@ -946,7 +955,7 @@ static void vhost_scsi_flush(struct vhost_scsi *vs)
static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features)
{
if (features & ~VHOST_FEATURES)
if (features & ~VHOST_SCSI_FEATURES)
return -EOPNOTSUPP;
mutex_lock(&vs->dev.mutex);
@ -992,7 +1001,7 @@ static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl,
return -EFAULT;
return 0;
case VHOST_GET_FEATURES:
features = VHOST_FEATURES;
features = VHOST_SCSI_FEATURES;
if (copy_to_user(featurep, &features, sizeof features))
return -EFAULT;
return 0;