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Code Issues Releases Wiki Activity

nvme: cleanup setting the disk name

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Return false from nvme_set_disk_name and let the caller set the
non-multipath name instead of duplicating the naming information in two
places.  Also remove the pointless local variables for the disk name
and flags and the not needed ctrl argument.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Javier González <javier.gonz@samsung.com>
This commit is contained in:
Christoph Hellwig 2021-04-07 12:46:46 +02:00
parent 3089738868
commit 9953ab0c5a
3 changed files with 26 additions and 27 deletions
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17
drivers/nvme/host/core.c
View file

@ -3998,8 +3998,7 @@ 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 = ctrl->numa_node, flags = GENHD_FL_EXT_DEVT;
int node = ctrl->numa_node;
if (nvme_identify_ns(ctrl, nsid, ids, &id))
return;
@ -4025,7 +4024,6 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
if (nvme_init_ns_head(ns, nsid, ids, id->nmic & NVME_NS_NMIC_SHARED))
goto out_free_queue;
nvme_set_disk_name(disk_name, ns, ctrl, &flags);
disk = alloc_disk_node(0, node);
if (!disk)
@ -4034,15 +4032,22 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
disk->fops = &nvme_bdev_ops;
disk->private_data = ns;
disk->queue = ns->queue;
disk->flags = flags;
memcpy(disk->disk_name, disk_name, DISK_NAME_LEN);
disk->flags = GENHD_FL_EXT_DEVT;
/*
* Without the multipath code enabled, multiple controller per
* subsystems are visible as devices and thus we cannot use the
* subsystem instance.
*/
if (!nvme_mpath_set_disk_name(ns, disk->disk_name, &disk->flags))
sprintf(disk->disk_name, "nvme%dn%d", ctrl->instance,
ns->head->instance);
ns->disk = disk;
if (nvme_update_ns_info(ns, id))
goto out_put_disk;
if ((ctrl->quirks & NVME_QUIRK_LIGHTNVM) && id->vs[0] == 0x1) {
if (nvme_nvm_register(ns, disk_name, node)) {
if (nvme_nvm_register(ns, disk->disk_name, node)) {
dev_warn(ctrl->device, "LightNVM init failure\n");
goto out_put_disk;
}

22
drivers/nvme/host/multipath.c
View file

@ -50,19 +50,19 @@ void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
* and those that have a single controller and use the controller node
* directly.
*/
void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
struct nvme_ctrl *ctrl, int *flags)
bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags)
{
if (!multipath) {
sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
} else if (ns->head->disk) {
sprintf(disk_name, "nvme%dc%dn%d", ctrl->subsys->instance,
ctrl->instance, ns->head->instance);
*flags = GENHD_FL_HIDDEN;
} else {
sprintf(disk_name, "nvme%dn%d", ctrl->subsys->instance,
ns->head->instance);
if (!multipath)
return false;
if (!ns->head->disk) {
sprintf(disk_name, "nvme%dn%d", ns->ctrl->subsys->instance,
ns->head->instance);
return true;
}
sprintf(disk_name, "nvme%dc%dn%d", ns->ctrl->subsys->instance,
ns->ctrl->instance, ns->head->instance);
*flags = GENHD_FL_HIDDEN;
return true;
}
void nvme_failover_req(struct request *req)

14
drivers/nvme/host/nvme.h
View file

@ -668,8 +668,7 @@ static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
struct nvme_ctrl *ctrl, int *flags);
bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags);
void nvme_failover_req(struct request *req);
void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
@ -708,16 +707,11 @@ static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
{
return false;
}
/*
* Without the multipath code enabled, multiple controller per subsystems are
* visible as devices and thus we cannot use the subsystem instance.
*/
static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
struct nvme_ctrl *ctrl, int *flags)
static inline bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name,
int *flags)
{
sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
return false;
}
static inline void nvme_failover_req(struct request *req)
{
}