lightnvm: move block provisioning to targets

In order to naturally support multi-target instances on an Open-Channel
SSD, targets should own the LUNs they get blocks from and manage
provisioning internally. This is done in several steps.

This patch moves the block provisioning inside of the target and removes
the get/put block interface from the media manager.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 037dff5951d4..1cdc8124c8c0 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -352,6 +352,7 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
 
         while (nlb) {
                 u32 cmd_nlb = min(nlb_pr_rq, nlb);
+                u64 elba = slba + cmd_nlb;
 
                 c.l2p.slba = cpu_to_le64(cmd_slba);
                 c.l2p.nlb = cpu_to_le32(cmd_nlb);
@@ -365,6 +366,11 @@ static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
                         goto out;
                 }
 
+                if (unlikely(elba > nvmdev->total_secs)) {
+                        pr_err("nvm: L2P data from device is out of bounds!\n");
+                        return -EINVAL;
+                }
+
                 if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
                         ret = -EINTR;
                         goto out;
@@ -383,11 +389,12 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
                                                                 u8 *blks)
 {
         struct request_queue *q = nvmdev->q;
+        struct nvm_geo *geo = &nvmdev->geo;
         struct nvme_ns *ns = q->queuedata;
         struct nvme_ctrl *ctrl = ns->ctrl;
         struct nvme_nvm_command c = {};
         struct nvme_nvm_bb_tbl *bb_tbl;
-        int nr_blks = nvmdev->blks_per_lun * nvmdev->plane_mode;
+        int nr_blks = geo->blks_per_lun * geo->plane_mode;
         int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
         int ret = 0;
 
@@ -428,7 +435,7 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
                 goto out;
         }
 
-        memcpy(blks, bb_tbl->blk, nvmdev->blks_per_lun * nvmdev->plane_mode);
+        memcpy(blks, bb_tbl->blk, geo->blks_per_lun * geo->plane_mode);
 out:
         kfree(bb_tbl);
         return ret;