lightnvm: disable interleaved metadata

Currently pblk only check the size of I/O metadata and does not take
into account if this metadata is in a separate buffer or interleaved
in a single metadata buffer.

In reality only the first scenario is supported, where second mode will
break pblk functionality during any IO operation.

This patch prevents pblk to be instantiated in case device only
supports interleaved metadata.

Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index ff6a6df..e8055b7 100644 (file)
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -1175,6 +1175,12 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
                return ERR_PTR(-EINVAL);
        }
 
+       if (geo->ext) {
+               pblk_err(pblk, "extended metadata not supported\n");
+               kfree(pblk);
+               return ERR_PTR(-EINVAL);
+       }
+
        spin_lock_init(&pblk->resubmit_lock);
        spin_lock_init(&pblk->trans_lock);
        spin_lock_init(&pblk->lock);

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index ba268d7..f145fc0 100644 (file)
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -990,6 +990,7 @@ int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
        geo = &dev->geo;
        geo->csecs = 1 << ns->lba_shift;
        geo->sos = ns->ms;
+       geo->ext = ns->ext;
 
        dev->q = q;
        memcpy(dev->name, disk_name, DISK_NAME_LEN);

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 7afedad..5d865a5 100644 (file)
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -357,6 +357,7 @@ struct nvm_geo {
        u32     clba;           /* sectors per chunk */
        u16     csecs;          /* sector size */
        u16     sos;            /* out-of-band area size */
+       bool    ext;            /* metadata in extended data buffer */
 
        /* device write constrains */
        u32     ws_min;         /* minimum write size */