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lightnvm: disable interleaved metadata

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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>
This commit is contained in:
Igor Konopko 2018-12-11 20:16:25 +01:00 committed by Jens Axboe
parent 24828d0536
commit a16816b9e4
3 changed files with 8 additions and 0 deletions
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6
drivers/lightnvm/pblk-init.c
View File

@ -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);

1
drivers/nvme/host/lightnvm.c
View File

@ -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);

1
include/linux/lightnvm.h
View File

@ -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 */