[PATCH v6 3/6] nvme: refactor ns info setup function

Daniel Wagner
2023-12-18T17:00:16Z

Use nvme_ns_head instead of nvme_ns where possible. This reduces the
coupling between the different data structures.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
---
drivers/nvme/host/core.c | 106 +++++++++++++++++++--------------------
drivers/nvme/host/zns.c | 16 +++---
2 files changed, 62 insertions(+), 60 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 7be1db8caff4..e3e997a437d9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1665,14 +1665,14 @@ int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo)
}

#ifdef CONFIG_BLK_DEV_INTEGRITY
-static void nvme_init_integrity(struct gendisk *disk, struct nvme_ns *ns,
- u32 max_integrity_segments)
+static void nvme_init_integrity(struct gendisk *disk,
+ struct nvme_ns_head *head, u32 max_integrity_segments)
{
struct blk_integrity integrity = { };

- switch (ns->head->pi_type) {
+ switch (head->pi_type) {
case NVME_NS_DPS_PI_TYPE3:
- switch (ns->head->guard_type) {
+ switch (head->guard_type) {
case NVME_NVM_NS_16B_GUARD:
integrity.profile = &t10_pi_type3_crc;
integrity.tag_size = sizeof(u16) + sizeof(u32);
@@ -1690,7 +1690,7 @@ static void nvme_init_integrity(struct gendisk *disk, struct nvme_ns *ns,
break;
case NVME_NS_DPS_PI_TYPE1:
case NVME_NS_DPS_PI_TYPE2:
- switch (ns->head->guard_type) {
+ switch (head->guard_type) {
case NVME_NVM_NS_16B_GUARD:
integrity.profile = &t10_pi_type1_crc;
integrity.tag_size = sizeof(u16);
@@ -1711,26 +1711,26 @@ static void nvme_init_integrity(struct gendisk *disk, struct nvme_ns *ns,
break;
}

- integrity.tuple_size = ns->head->ms;
+ integrity.tuple_size = head->ms;
blk_integrity_register(disk, &integrity);
blk_queue_max_integrity_segments(disk->queue, max_integrity_segments);
}
#else
-static void nvme_init_integrity(struct gendisk *disk, struct nvme_ns *ns,
- u32 max_integrity_segments)
+static void nvme_init_integrity(struct gendisk *disk,
+ struct nvme_ns_head *head, u32 max_integrity_segments)
{
}
#endif /* CONFIG_BLK_DEV_INTEGRITY */

-static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns)
+static void nvme_config_discard(struct nvme_ctrl *ctrl, struct gendisk *disk,
+ struct nvme_ns_head *head)
{
- struct nvme_ctrl *ctrl = ns->ctrl;
struct request_queue *queue = disk->queue;
u32 size = queue_logical_block_size(queue);

- if (ctrl->dmrsl && ctrl->dmrsl <= nvme_sect_to_lba(ns->head, UINT_MAX))
+ if (ctrl->dmrsl && ctrl->dmrsl <= nvme_sect_to_lba(head, UINT_MAX))
ctrl->max_discard_sectors =
- nvme_lba_to_sect(ns->head, ctrl->dmrsl);
+ nvme_lba_to_sect(head, ctrl->dmrsl);

if (ctrl->max_discard_sectors == 0) {
blk_queue_max_discard_sectors(queue, 0);
@@ -1761,21 +1761,21 @@ static bool nvme_ns_ids_equal(struct nvme_ns_ids *a, struct nvme_ns_ids *b)
a->csi == b->csi;
}

-static int nvme_init_ms(struct nvme_ns *ns, struct nvme_id_ns *id)
+static int nvme_init_ms(struct nvme_ctrl *ctrl, struct nvme_ns_head *head,
+ struct nvme_id_ns *id)
{
bool first = id->dps & NVME_NS_DPS_PI_FIRST;
unsigned lbaf = nvme_lbaf_index(id->flbas);
- struct nvme_ctrl *ctrl = ns->ctrl;
struct nvme_command c = { };
struct nvme_id_ns_nvm *nvm;
int ret = 0;
u32 elbaf;

- ns->head->pi_size = 0;
- ns->head->ms = le16_to_cpu(id->lbaf[lbaf].ms);
+ head->pi_size = 0;
+ head->ms = le16_to_cpu(id->lbaf[lbaf].ms);
if (!(ctrl->ctratt & NVME_CTRL_ATTR_ELBAS)) {
- ns->head->pi_size = sizeof(struct t10_pi_tuple);
- ns->head->guard_type = NVME_NVM_NS_16B_GUARD;
+ head->pi_size = sizeof(struct t10_pi_tuple);
+ head->guard_type = NVME_NVM_NS_16B_GUARD;
goto set_pi;
}

@@ -1784,11 +1784,11 @@ static int nvme_init_ms(struct nvme_ns *ns, struct nvme_id_ns *id)
return -ENOMEM;

c.identify.opcode = nvme_admin_identify;
- c.identify.nsid = cpu_to_le32(ns->head->ns_id);
+ c.identify.nsid = cpu_to_le32(head->ns_id);
c.identify.cns = NVME_ID_CNS_CS_NS;
c.identify.csi = NVME_CSI_NVM;

- ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, nvm, sizeof(*nvm));
+ ret = nvme_submit_sync_cmd(ctrl->admin_q, &c, nvm, sizeof(*nvm));
if (ret)
goto free_data;

@@ -1798,13 +1798,13 @@ static int nvme_init_ms(struct nvme_ns *ns, struct nvme_id_ns *id)
if (nvme_elbaf_sts(elbaf))
goto free_data;

- ns->head->guard_type = nvme_elbaf_guard_type(elbaf);
- switch (ns->head->guard_type) {
+ head->guard_type = nvme_elbaf_guard_type(elbaf);
+ switch (head->guard_type) {
case NVME_NVM_NS_64B_GUARD:
- ns->head->pi_size = sizeof(struct crc64_pi_tuple);
+ head->pi_size = sizeof(struct crc64_pi_tuple);
break;
case NVME_NVM_NS_16B_GUARD:
- ns->head->pi_size = sizeof(struct t10_pi_tuple);
+ head->pi_size = sizeof(struct t10_pi_tuple);
break;
default:
break;
@@ -1813,25 +1813,25 @@ static int nvme_init_ms(struct nvme_ns *ns, struct nvme_id_ns *id)
free_data:
kfree(nvm);
set_pi:
- if (ns->head->pi_size && (first || ns->head->ms == ns->head->pi_size))
- ns->head->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
+ if (head->pi_size && (first || head->ms == head->pi_size))
+ head->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
else
- ns->head->pi_type = 0;
+ head->pi_type = 0;

return ret;
}

-static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id)
+static int nvme_configure_metadata(struct nvme_ctrl *ctrl,
+ struct nvme_ns_head *head, struct nvme_id_ns *id)
{
- struct nvme_ctrl *ctrl = ns->ctrl;
int ret;

- ret = nvme_init_ms(ns, id);
+ ret = nvme_init_ms(ctrl, head, id);
if (ret)
return ret;

- ns->head->features &= ~(NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS);
- if (!ns->head->ms || !(ctrl->ops->flags & NVME_F_METADATA_SUPPORTED))
+ head->features &= ~(NVME_NS_METADATA_SUPPORTED | NVME_NS_EXT_LBAS);
+ if (!head->ms || !(ctrl->ops->flags & NVME_F_METADATA_SUPPORTED))
return 0;

if (ctrl->ops->flags & NVME_F_FABRICS) {
@@ -1843,7 +1843,7 @@ static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id)
if (WARN_ON_ONCE(!(id->flbas & NVME_NS_FLBAS_META_EXT)))
return 0;

- ns->head->features |= NVME_NS_EXT_LBAS;
+ head->features |= NVME_NS_EXT_LBAS;

/*
* The current fabrics transport drivers support namespace
@@ -1854,8 +1854,8 @@ static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id)
* Note, this check will need to be modified if any drivers
* gain the ability to use other metadata formats.
*/
- if (ctrl->max_integrity_segments && nvme_ns_has_pi(ns->head))
- ns->head->features |= NVME_NS_METADATA_SUPPORTED;
+ if (ctrl->max_integrity_segments && nvme_ns_has_pi(head))
+ head->features |= NVME_NS_METADATA_SUPPORTED;
} else {
/*
* For PCIe controllers, we can't easily remap the separate
@@ -1864,9 +1864,9 @@ static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id)
* We allow extended LBAs for the passthrough interface, though.
*/
if (id->flbas & NVME_NS_FLBAS_META_EXT)
- ns->head->features |= NVME_NS_EXT_LBAS;
+ head->features |= NVME_NS_EXT_LBAS;
else
- ns->head->features |= NVME_NS_METADATA_SUPPORTED;
+ head->features |= NVME_NS_METADATA_SUPPORTED;
}
return 0;
}
@@ -1889,18 +1889,18 @@ static void nvme_set_queue_limits(struct nvme_ctrl *ctrl,
blk_queue_write_cache(q, vwc, vwc);
}

-static void nvme_update_disk_info(struct gendisk *disk,
- struct nvme_ns *ns, struct nvme_id_ns *id)
+static void nvme_update_disk_info(struct nvme_ctrl *ctrl, struct gendisk *disk,
+ struct nvme_ns_head *head, struct nvme_id_ns *id)
{
- sector_t capacity = nvme_lba_to_sect(ns->head, le64_to_cpu(id->nsze));
- u32 bs = 1U << ns->head->lba_shift;
+ sector_t capacity = nvme_lba_to_sect(head, le64_to_cpu(id->nsze));
+ u32 bs = 1U << head->lba_shift;
u32 atomic_bs, phys_bs, io_opt = 0;

/*
* The block layer can't support LBA sizes larger than the page size
* yet, so catch this early and don't allow block I/O.
*/
- if (ns->head->lba_shift > PAGE_SHIFT) {
+ if (head->lba_shift > PAGE_SHIFT) {
capacity = 0;
bs = (1 << 9);
}
@@ -1917,7 +1917,7 @@ static void nvme_update_disk_info(struct gendisk *disk,
if (id->nsfeat & NVME_NS_FEAT_ATOMICS && id->nawupf)
atomic_bs = (1 + le16_to_cpu(id->nawupf)) * bs;
else
- atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs;
+ atomic_bs = (1 + ctrl->subsys->awupf) * bs;
}

if (id->nsfeat & NVME_NS_FEAT_IO_OPT) {
@@ -1943,20 +1943,20 @@ static void nvme_update_disk_info(struct gendisk *disk,
* I/O to namespaces with metadata except when the namespace supports
* PI, as it can strip/insert in that case.
*/
- if (ns->head->ms) {
+ if (head->ms) {
if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) &&
- (ns->head->features & NVME_NS_METADATA_SUPPORTED))
- nvme_init_integrity(disk, ns,
- ns->ctrl->max_integrity_segments);
- else if (!nvme_ns_has_pi(ns->head))
+ (head->features & NVME_NS_METADATA_SUPPORTED))
+ nvme_init_integrity(disk, head,
+ ctrl->max_integrity_segments);
+ else if (!nvme_ns_has_pi(head))
capacity = 0;
}

set_capacity_and_notify(disk, capacity);

- nvme_config_discard(disk, ns);
+ nvme_config_discard(ctrl, disk, head);
blk_queue_max_write_zeroes_sectors(disk->queue,
- ns->ctrl->max_zeroes_sectors);
+ ctrl->max_zeroes_sectors);
}

static bool nvme_ns_is_readonly(struct nvme_ns *ns, struct nvme_ns_info *info)
@@ -2042,13 +2042,13 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns,
ns->head->lba_shift = id->lbaf[lbaf].ds;
nvme_set_queue_limits(ns->ctrl, ns->queue);

- ret = nvme_configure_metadata(ns, id);
+ ret = nvme_configure_metadata(ns->ctrl, ns->head, id);
if (ret < 0) {
blk_mq_unfreeze_queue(ns->disk->queue);
goto out;
}
nvme_set_chunk_sectors(ns, id);
- nvme_update_disk_info(ns->disk, ns, id);
+ nvme_update_disk_info(ns->ctrl, ns->disk, ns->head, id);

if (ns->head->ids.csi == NVME_CSI_ZNS) {
ret = nvme_update_zone_info(ns, lbaf);
@@ -2078,7 +2078,7 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns,

if (nvme_ns_head_multipath(ns->head)) {
blk_mq_freeze_queue(ns->head->disk->queue);
- nvme_update_disk_info(ns->head->disk, ns, id);
+ nvme_update_disk_info(ns->ctrl, ns->head->disk, ns->head, id);
set_disk_ro(ns->head->disk, nvme_ns_is_readonly(ns, info));
nvme_mpath_revalidate_paths(ns);
blk_stack_limits(&ns->head->disk->queue->limits,
diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c
index ded52ab05424..56b27aabcad9 100644
--- a/drivers/nvme/host/zns.c
+++ b/drivers/nvme/host/zns.c
@@ -148,7 +148,8 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns,
return NULL;
}

-static int nvme_zone_parse_entry(struct nvme_ns *ns,
+static int nvme_zone_parse_entry(struct nvme_ctrl *ctrl,
+ struct nvme_ns_head *head,
struct nvme_zone_descriptor *entry,
unsigned int idx, report_zones_cb cb,
void *data)
@@ -156,20 +157,20 @@ static int nvme_zone_parse_entry(struct nvme_ns *ns,
struct blk_zone zone = { };

if ((entry->zt & 0xf) != NVME_ZONE_TYPE_SEQWRITE_REQ) {
- dev_err(ns->ctrl->device, "invalid zone type %#x\n",
+ dev_err(ctrl->device, "invalid zone type %#x\n",
entry->zt);
return -EINVAL;
}

zone.type = BLK_ZONE_TYPE_SEQWRITE_REQ;
zone.cond = entry->zs >> 4;
- zone.len = ns->head->zsze;
- zone.capacity = nvme_lba_to_sect(ns->head, le64_to_cpu(entry->zcap));
- zone.start = nvme_lba_to_sect(ns->head, le64_to_cpu(entry->zslba));
+ zone.len = head->zsze;
+ zone.capacity = nvme_lba_to_sect(head, le64_to_cpu(entry->zcap));
+ zone.start = nvme_lba_to_sect(head, le64_to_cpu(entry->zslba));
if (zone.cond == BLK_ZONE_COND_FULL)
zone.wp = zone.start + zone.len;
else
- zone.wp = nvme_lba_to_sect(ns->head, le64_to_cpu(entry->wp));
+ zone.wp = nvme_lba_to_sect(head, le64_to_cpu(entry->wp));

return cb(&zone, idx, data);
}
@@ -214,7 +215,8 @@ int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
break;

for (i = 0; i < nz && zone_idx < nr_zones; i++) {
- ret = nvme_zone_parse_entry(ns, &report->entries[i],
+ ret = nvme_zone_parse_entry(ns->ctrl, ns->head,
+ &report->entries[i],
zone_idx, cb, data);
if (ret)
goto out_free;
--
2.43.0