[PATCH v4 4/5] lightnvm: Disable interleaved metadata
From: Igor Konopko <hidden>
Date: 2018-11-29 07:21:46
Subsystem:
nvm express driver, the rest · Maintainers:
Keith Busch, Jens Axboe, Christoph Hellwig, Sagi Grimberg, Linus Torvalds
Currently pblk and lightnvm does only check for size of OOB metadata and does not care wheather this meta is located in separate buffer or is interleaved with data in single buffer. In reality only the first scenario is supported, where second mode will break pblk functionality during any IO operation. The goal of this patch is to block creation of pblk devices in case of interleaved metadata Reviewed-by: Javier González <redacted> Signed-off-by: Igor Konopko <redacted> --- drivers/lightnvm/pblk-init.c | 6 ++++++ drivers/nvme/host/lightnvm.c | 1 + include/linux/lightnvm.h | 1 + 3 files changed, 8 insertions(+)
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index b67bca810eb7..a728f861edd6 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c@@ -1179,6 +1179,12 @@ 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 60ac32b03fb6..ceb92610f43b 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c@@ -982,6 +982,7 @@ void nvme_nvm_update_nvm_info(struct nvme_ns *ns) if (geo->version != NVM_OCSSD_SPEC_12) { geo->csecs = 1 << ns->lba_shift; geo->sos = ns->ms; + geo->ext = ns->ext; } if (nvm_create_dma_pool(ndev))
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 216b373b7fea..2717e6141b1a 100644
--- 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 */
--
2.14.5