The function is used in two places, and the shared code for those will
diverge later in this series.
Instead factor out a new helper to get the ids for a namespace, simplify
the calling conventions for nvme_identify_ns and just open code the
sequence.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/nvme/host/core.c | 100 +++++++++++++++++++++++++----------------------
1 file changed, 53 insertions(+), 47 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f91c649c9ca5..157dbb7b328d 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -783,7 +783,8 @@ static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id)
return error;
}
-static int nvme_identify_ns_descs(struct nvme_ns *ns, unsigned nsid)
+static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid,
+ u8 *eui64, u8 *nguid, uuid_t *uuid)
{
struct nvme_command c = { };
int status;
@@ -799,7 +800,7 @@ static int nvme_identify_ns_descs(struct nvme_ns *ns, unsigned nsid)
if (!data)
return -ENOMEM;
- status = nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, data,
+ status = nvme_submit_sync_cmd(ctrl->admin_q, &c, data,
NVME_IDENTIFY_DATA_SIZE);
if (status)
goto free_data;
@@ -813,33 +814,33 @@ static int nvme_identify_ns_descs(struct nvme_ns *ns, unsigned nsid)
switch (cur->nidt) {
case NVME_NIDT_EUI64:
if (cur->nidl != NVME_NIDT_EUI64_LEN) {
- dev_warn(ns->ctrl->device,
+ dev_warn(ctrl->device,
"ctrl returned bogus length: %d for NVME_NIDT_EUI64\n",
cur->nidl);
goto free_data;
}
len = NVME_NIDT_EUI64_LEN;
- memcpy(ns->eui, data + pos + sizeof(*cur), len);
+ memcpy(eui64, data + pos + sizeof(*cur), len);
break;
case NVME_NIDT_NGUID:
if (cur->nidl != NVME_NIDT_NGUID_LEN) {
- dev_warn(ns->ctrl->device,
+ dev_warn(ctrl->device,
"ctrl returned bogus length: %d for NVME_NIDT_NGUID\n",
cur->nidl);
goto free_data;
}
len = NVME_NIDT_NGUID_LEN;
- memcpy(ns->nguid, data + pos + sizeof(*cur), len);
+ memcpy(nguid, data + pos + sizeof(*cur), len);
break;
case NVME_NIDT_UUID:
if (cur->nidl != NVME_NIDT_UUID_LEN) {
- dev_warn(ns->ctrl->device,
+ dev_warn(ctrl->device,
"ctrl returned bogus length: %d for NVME_NIDT_UUID\n",
cur->nidl);
goto free_data;
}
len = NVME_NIDT_UUID_LEN;
- uuid_copy(&ns->uuid, data + pos + sizeof(*cur));
+ uuid_copy(uuid, data + pos + sizeof(*cur));
break;
default:
/* Skip unnkown types */
@@ -864,9 +865,10 @@ static int nvme_identify_ns_list(struct nvme_ctrl *dev, unsigned nsid, __le32 *n
return nvme_submit_sync_cmd(dev->admin_q, &c, ns_list, 0x1000);
}
-static int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid,
- struct nvme_id_ns **id)
+static struct nvme_id_ns *nvme_identify_ns(struct nvme_ctrl *ctrl,
+ unsigned nsid)
{
+ struct nvme_id_ns *id;
struct nvme_command c = { };
int error;
@@ -875,15 +877,18 @@ static int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid,
c.identify.nsid = cpu_to_le32(nsid);
c.identify.cns = NVME_ID_CNS_NS;
- *id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL);
- if (!*id)
- return -ENOMEM;
+ id = kmalloc(sizeof(*id), GFP_KERNEL);
+ if (!id)
+ return NULL;
- error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
- sizeof(struct nvme_id_ns));
- if (error)
- kfree(*id);
- return error;
+ error = nvme_submit_sync_cmd(ctrl->admin_q, &c, id, sizeof(*id));
+ if (error) {
+ dev_warn(ctrl->device, "Identify namespace failed\n");
+ kfree(id);
+ return NULL;
+ }
+
+ return id;
}
static int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
@@ -1174,32 +1179,21 @@ static void nvme_config_discard(struct nvme_ns *ns)
blk_queue_max_write_zeroes_sectors(ns->queue, UINT_MAX);
}
-static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id)
+static void nvme_report_ns_ids(struct nvme_ctrl *ctrl, unsigned int nsid,
+ struct nvme_id_ns *id, u8 *eui64, u8 *nguid, uuid_t *uuid)
{
- if (nvme_identify_ns(ns->ctrl, ns->ns_id, id)) {
- dev_warn(ns->ctrl->device, "Identify namespace failed\n");
- return -ENODEV;
- }
-
- if ((*id)->ncap == 0) {
- kfree(*id);
- return -ENODEV;
- }
-
- if (ns->ctrl->vs >= NVME_VS(1, 1, 0))
- memcpy(ns->eui, (*id)->eui64, sizeof(ns->eui));
- if (ns->ctrl->vs >= NVME_VS(1, 2, 0))
- memcpy(ns->nguid, (*id)->nguid, sizeof(ns->nguid));
- if (ns->ctrl->vs >= NVME_VS(1, 3, 0)) {
+ if (ctrl->vs >= NVME_VS(1, 1, 0))
+ memcpy(eui64, id->eui64, sizeof(id->eui64));
+ if (ctrl->vs >= NVME_VS(1, 2, 0))
+ memcpy(nguid, id->nguid, sizeof(id->nguid));
+ if (ctrl->vs >= NVME_VS(1, 3, 0)) {
/* Don't treat error as fatal we potentially
* already have a NGUID or EUI-64
*/
- if (nvme_identify_ns_descs(ns, ns->ns_id))
- dev_warn(ns->ctrl->device,
+ if (nvme_identify_ns_descs(ctrl, nsid, eui64, nguid, uuid))
+ dev_warn(ctrl->device,
"%s: Identify Descriptors failed\n", __func__);
}
-
- return 0;
}
static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
@@ -1240,22 +1234,28 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
static int nvme_revalidate_disk(struct gendisk *disk)
{
struct nvme_ns *ns = disk->private_data;
- struct nvme_id_ns *id = NULL;
- int ret;
+ struct nvme_ctrl *ctrl = ns->ctrl;
+ struct nvme_id_ns *id;
+ int ret = 0;
if (test_bit(NVME_NS_DEAD, &ns->flags)) {
set_capacity(disk, 0);
return -ENODEV;
}
- ret = nvme_revalidate_ns(ns, &id);
- if (ret)
- return ret;
+ id = nvme_identify_ns(ctrl, ns->ns_id);
+ if (!id)
+ return -ENODEV;
- __nvme_revalidate_disk(disk, id);
- kfree(id);
+ if (id->ncap == 0) {
+ ret = -ENODEV;
+ goto out;
+ }
- return 0;
+ nvme_report_ns_ids(ctrl, ns->ns_id, id, ns->eui, ns->nguid, &ns->uuid);
+out:
+ kfree(id);
+ return ret;
}
static char nvme_pr_type(enum pr_type type)
@@ -2347,9 +2347,15 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->instance);
- if (nvme_revalidate_ns(ns, &id))
+ id = nvme_identify_ns(ctrl, nsid);
+ if (!id)
goto out_free_queue;
+ if (id->ncap == 0)
+ goto out_free_id;
+
+ nvme_report_ns_ids(ctrl, ns->ns_id, id, ns->eui, ns->nguid, &ns->uuid);
+
if (nvme_nvm_ns_supported(ns, id) &&
nvme_nvm_register(ns, disk_name, node)) {
dev_warn(ctrl->device, "%s: LightNVM init failure\n", __func__);
--
2.11.0
