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authorMatias Bjørling <m@bjorling.me>2016-09-16 14:25:04 +0200
committerJens Axboe <axboe@fb.com>2016-09-21 07:56:12 -0600
commitac81bfa9867103c9d50996ec21fa9179b81b727e (patch)
treef286f5ea3943c3532b852b44c460d6beb0c6d3c7 /drivers
parente105ddb4a2a13d779311349df2c32fa22a87c406 (diff)
downloadlinux-ac81bfa9867103c9d50996ec21fa9179b81b727e.tar.bz2
nvme: refactor namespaces to support non-gendisk devices
With LightNVM enabled namespaces, the gendisk structure is not exposed to the user. This prevents LightNVM users from accessing the NVMe device driver specific sysfs entries, and LightNVM namespace geometry. Refactor the revalidation process, so that a namespace, instead of a gendisk, is revalidated. This later allows patches to wire up the sysfs entries up to a non-gendisk namespace. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/lightnvm/core.c2
-rw-r--r--drivers/nvme/host/core.c114
-rw-r--r--drivers/nvme/host/lightnvm.c5
3 files changed, 78 insertions, 43 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 9ebd2cfbd849..25c5df920326 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -581,6 +581,8 @@ static int nvm_core_init(struct nvm_dev *dev)
mutex_init(&dev->mlock);
spin_lock_init(&dev->lock);
+ blk_queue_logical_block_size(dev->q, dev->sec_size);
+
return 0;
err_fmtype:
kfree(dev->lun_map);
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 2feacc70bf61..2c3da3315a02 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -888,42 +888,33 @@ static void nvme_config_discard(struct nvme_ns *ns)
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
}
-static int nvme_revalidate_disk(struct gendisk *disk)
+static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id)
{
- struct nvme_ns *ns = disk->private_data;
- struct nvme_id_ns *id;
- u8 lbaf, pi_type;
- u16 old_ms;
- unsigned short bs;
-
- if (test_bit(NVME_NS_DEAD, &ns->flags)) {
- set_capacity(disk, 0);
- return -ENODEV;
- }
- if (nvme_identify_ns(ns->ctrl, ns->ns_id, &id)) {
+ if (nvme_identify_ns(ns->ctrl, ns->ns_id, id)) {
dev_warn(disk_to_dev(ns->disk), "%s: Identify failure\n",
__func__);
return -ENODEV;
}
- if (id->ncap == 0) {
- kfree(id);
- return -ENODEV;
- }
- if (nvme_nvm_ns_supported(ns, id) && ns->type != NVME_NS_LIGHTNVM) {
- if (nvme_nvm_register(ns->queue, disk->disk_name)) {
- dev_warn(disk_to_dev(ns->disk),
- "%s: LightNVM init failure\n", __func__);
- kfree(id);
- return -ENODEV;
- }
- ns->type = NVME_NS_LIGHTNVM;
+ if ((*id)->ncap == 0) {
+ kfree(*id);
+ return -ENODEV;
}
if (ns->ctrl->vs >= NVME_VS(1, 1))
- memcpy(ns->eui, id->eui64, sizeof(ns->eui));
+ memcpy(ns->eui, (*id)->eui64, sizeof(ns->eui));
if (ns->ctrl->vs >= NVME_VS(1, 2))
- memcpy(ns->uuid, id->nguid, sizeof(ns->uuid));
+ memcpy(ns->uuid, (*id)->nguid, sizeof(ns->uuid));
+
+ return 0;
+}
+
+static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
+{
+ struct nvme_ns *ns = disk->private_data;
+ u8 lbaf, pi_type;
+ u16 old_ms;
+ unsigned short bs;
old_ms = ns->ms;
lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
@@ -962,8 +953,26 @@ static int nvme_revalidate_disk(struct gendisk *disk)
if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM)
nvme_config_discard(ns);
blk_mq_unfreeze_queue(disk->queue);
+}
+static int nvme_revalidate_disk(struct gendisk *disk)
+{
+ struct nvme_ns *ns = disk->private_data;
+ struct nvme_id_ns *id = NULL;
+ int ret;
+
+ if (test_bit(NVME_NS_DEAD, &ns->flags)) {
+ set_capacity(disk, 0);
+ return -ENODEV;
+ }
+
+ ret = nvme_revalidate_ns(ns, &id);
+ if (ret)
+ return ret;
+
+ __nvme_revalidate_disk(disk, id);
kfree(id);
+
return 0;
}
@@ -1642,6 +1651,8 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
{
struct nvme_ns *ns;
struct gendisk *disk;
+ struct nvme_id_ns *id;
+ char disk_name[DISK_NAME_LEN];
int node = dev_to_node(ctrl->dev);
ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node);
@@ -1659,33 +1670,54 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
ns->queue->queuedata = ns;
ns->ctrl = ctrl;
- disk = alloc_disk_node(0, node);
- if (!disk)
- goto out_free_queue;
-
kref_init(&ns->kref);
ns->ns_id = nsid;
- ns->disk = disk;
ns->lba_shift = 9; /* set to a default value for 512 until disk is validated */
-
blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift);
nvme_set_queue_limits(ctrl, ns->queue);
- disk->fops = &nvme_fops;
- disk->private_data = ns;
- disk->queue = ns->queue;
- disk->flags = GENHD_FL_EXT_DEVT;
- sprintf(disk->disk_name, "nvme%dn%d", ctrl->instance, ns->instance);
+ sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->instance);
- if (nvme_revalidate_disk(ns->disk))
- goto out_free_disk;
+ if (nvme_revalidate_ns(ns, &id))
+ goto out_free_queue;
+
+ if (nvme_nvm_ns_supported(ns, id)) {
+ if (nvme_nvm_register(ns->queue, disk_name)) {
+ dev_warn(ctrl->dev,
+ "%s: LightNVM init failure\n", __func__);
+ goto out_free_id;
+ }
+
+ disk = alloc_disk_node(0, node);
+ if (!disk)
+ goto out_free_id;
+ memcpy(disk->disk_name, disk_name, DISK_NAME_LEN);
+ ns->disk = disk;
+ ns->type = NVME_NS_LIGHTNVM;
+ } else {
+ disk = alloc_disk_node(0, node);
+ if (!disk)
+ goto out_free_id;
+
+ disk->fops = &nvme_fops;
+ disk->private_data = ns;
+ disk->queue = ns->queue;
+ disk->flags = GENHD_FL_EXT_DEVT;
+ memcpy(disk->disk_name, disk_name, DISK_NAME_LEN);
+ ns->disk = disk;
+
+ __nvme_revalidate_disk(disk, id);
+ }
mutex_lock(&ctrl->namespaces_mutex);
list_add_tail(&ns->list, &ctrl->namespaces);
mutex_unlock(&ctrl->namespaces_mutex);
kref_get(&ctrl->kref);
+
+ kfree(id);
+
if (ns->type == NVME_NS_LIGHTNVM)
return;
@@ -1695,8 +1727,8 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
pr_warn("%s: failed to create sysfs group for identification\n",
ns->disk->disk_name);
return;
- out_free_disk:
- kfree(disk);
+ out_free_id:
+ kfree(id);
out_free_queue:
blk_cleanup_queue(ns->queue);
out_release_instance:
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 63f483daf930..7268a7a1a19a 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -474,8 +474,9 @@ static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
if (rqd->opcode == NVM_OP_HBWRITE || rqd->opcode == NVM_OP_HBREAD)
- c->hb_rw.slba = cpu_to_le64(nvme_block_nr(ns,
- rqd->bio->bi_iter.bi_sector));
+ /* momentarily hardcode the shift configuration. lba_shift from
+ * nvm_dev will be available in a follow-up patch */
+ c->hb_rw.slba = cpu_to_le64(rqd->bio->bi_iter.bi_sector >> 3);
}
static void nvme_nvm_end_io(struct request *rq, int error)