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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
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
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commit
13d2080db3
@ -1139,8 +1139,10 @@ target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
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return ret;
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ret = target_check_reservation(cmd);
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if (ret)
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if (ret) {
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cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
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return ret;
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}
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ret = dev->transport->parse_cdb(cmd);
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if (ret)
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@ -60,6 +60,15 @@ enum {
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VHOST_SCSI_VQ_IO = 2,
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};
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/*
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* VIRTIO_RING_F_EVENT_IDX seems broken. Not sure the bug is in
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* kernel but disabling it helps.
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* TODO: debug and remove the workaround.
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*/
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enum {
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VHOST_SCSI_FEATURES = VHOST_FEATURES & (~VIRTIO_RING_F_EVENT_IDX)
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};
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#define VHOST_SCSI_MAX_TARGET 256
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#define VHOST_SCSI_MAX_VQ 128
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@ -946,7 +955,7 @@ static void vhost_scsi_flush(struct vhost_scsi *vs)
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static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features)
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{
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if (features & ~VHOST_FEATURES)
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if (features & ~VHOST_SCSI_FEATURES)
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return -EOPNOTSUPP;
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mutex_lock(&vs->dev.mutex);
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@ -992,7 +1001,7 @@ static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl,
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return -EFAULT;
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return 0;
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case VHOST_GET_FEATURES:
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features = VHOST_FEATURES;
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features = VHOST_SCSI_FEATURES;
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if (copy_to_user(featurep, &features, sizeof features))
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return -EFAULT;
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return 0;
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