summaryrefslogtreecommitdiffstats
path: root/drivers/lightnvm/core.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/lightnvm/core.c')
-rw-r--r--drivers/lightnvm/core.c198
1 files changed, 39 insertions, 159 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 0da196f6891b..8afb04cc4d5a 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -18,8 +18,6 @@
*
*/
-#include <linux/blkdev.h>
-#include <linux/blk-mq.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/sem.h>
@@ -28,42 +26,37 @@
#include <linux/miscdevice.h>
#include <linux/lightnvm.h>
#include <linux/sched/sysctl.h>
-#include <uapi/linux/lightnvm.h>
static LIST_HEAD(nvm_tgt_types);
static LIST_HEAD(nvm_mgrs);
static LIST_HEAD(nvm_devices);
-static LIST_HEAD(nvm_targets);
static DECLARE_RWSEM(nvm_lock);
-static struct nvm_target *nvm_find_target(const char *name)
+struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
{
- struct nvm_target *tgt;
+ struct nvm_tgt_type *tmp, *tt = NULL;
- list_for_each_entry(tgt, &nvm_targets, list)
- if (!strcmp(name, tgt->disk->disk_name))
- return tgt;
+ if (lock)
+ down_write(&nvm_lock);
- return NULL;
-}
-
-static struct nvm_tgt_type *nvm_find_target_type(const char *name)
-{
- struct nvm_tgt_type *tt;
-
- list_for_each_entry(tt, &nvm_tgt_types, list)
- if (!strcmp(name, tt->name))
- return tt;
+ list_for_each_entry(tmp, &nvm_tgt_types, list)
+ if (!strcmp(name, tmp->name)) {
+ tt = tmp;
+ break;
+ }
- return NULL;
+ if (lock)
+ up_write(&nvm_lock);
+ return tt;
}
+EXPORT_SYMBOL(nvm_find_target_type);
int nvm_register_tgt_type(struct nvm_tgt_type *tt)
{
int ret = 0;
down_write(&nvm_lock);
- if (nvm_find_target_type(tt->name))
+ if (nvm_find_target_type(tt->name, 0))
ret = -EEXIST;
else
list_add(&tt->list, &nvm_tgt_types);
@@ -605,42 +598,11 @@ err_fmtype:
return ret;
}
-static void nvm_remove_target(struct nvm_target *t)
-{
- struct nvm_tgt_type *tt = t->type;
- struct gendisk *tdisk = t->disk;
- struct request_queue *q = tdisk->queue;
-
- lockdep_assert_held(&nvm_lock);
-
- del_gendisk(tdisk);
- blk_cleanup_queue(q);
-
- if (tt->exit)
- tt->exit(tdisk->private_data);
-
- put_disk(tdisk);
-
- list_del(&t->list);
- kfree(t);
-}
-
static void nvm_free_mgr(struct nvm_dev *dev)
{
- struct nvm_target *tgt, *tmp;
-
if (!dev->mt)
return;
- down_write(&nvm_lock);
- list_for_each_entry_safe(tgt, tmp, &nvm_targets, list) {
- if (tgt->dev != dev)
- continue;
-
- nvm_remove_target(tgt);
- }
- up_write(&nvm_lock);
-
dev->mt->unregister_mgr(dev);
dev->mt = NULL;
}
@@ -787,91 +749,6 @@ void nvm_unregister(char *disk_name)
}
EXPORT_SYMBOL(nvm_unregister);
-static const struct block_device_operations nvm_fops = {
- .owner = THIS_MODULE,
-};
-
-static int nvm_create_target(struct nvm_dev *dev,
- struct nvm_ioctl_create *create)
-{
- struct nvm_ioctl_create_simple *s = &create->conf.s;
- struct request_queue *tqueue;
- struct gendisk *tdisk;
- struct nvm_tgt_type *tt;
- struct nvm_target *t;
- void *targetdata;
-
- if (!dev->mt) {
- pr_info("nvm: device has no media manager registered.\n");
- return -ENODEV;
- }
-
- down_write(&nvm_lock);
- tt = nvm_find_target_type(create->tgttype);
- if (!tt) {
- pr_err("nvm: target type %s not found\n", create->tgttype);
- up_write(&nvm_lock);
- return -EINVAL;
- }
-
- t = nvm_find_target(create->tgtname);
- if (t) {
- pr_err("nvm: target name already exists.\n");
- up_write(&nvm_lock);
- return -EINVAL;
- }
- up_write(&nvm_lock);
-
- t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
- if (!t)
- return -ENOMEM;
-
- tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
- if (!tqueue)
- goto err_t;
- blk_queue_make_request(tqueue, tt->make_rq);
-
- tdisk = alloc_disk(0);
- if (!tdisk)
- goto err_queue;
-
- sprintf(tdisk->disk_name, "%s", create->tgtname);
- tdisk->flags = GENHD_FL_EXT_DEVT;
- tdisk->major = 0;
- tdisk->first_minor = 0;
- tdisk->fops = &nvm_fops;
- tdisk->queue = tqueue;
-
- targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end);
- if (IS_ERR(targetdata))
- goto err_init;
-
- tdisk->private_data = targetdata;
- tqueue->queuedata = targetdata;
-
- blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
-
- set_capacity(tdisk, tt->capacity(targetdata));
- add_disk(tdisk);
-
- t->type = tt;
- t->disk = tdisk;
- t->dev = dev;
-
- down_write(&nvm_lock);
- list_add_tail(&t->list, &nvm_targets);
- up_write(&nvm_lock);
-
- return 0;
-err_init:
- put_disk(tdisk);
-err_queue:
- blk_cleanup_queue(tqueue);
-err_t:
- kfree(t);
- return -ENOMEM;
-}
-
static int __nvm_configure_create(struct nvm_ioctl_create *create)
{
struct nvm_dev *dev;
@@ -880,11 +757,17 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
down_write(&nvm_lock);
dev = nvm_find_nvm_dev(create->dev);
up_write(&nvm_lock);
+
if (!dev) {
pr_err("nvm: device not found\n");
return -EINVAL;
}
+ if (!dev->mt) {
+ pr_info("nvm: device has no media manager registered.\n");
+ return -ENODEV;
+ }
+
if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
pr_err("nvm: config type not valid\n");
return -EINVAL;
@@ -897,25 +780,7 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
return -EINVAL;
}
- return nvm_create_target(dev, create);
-}
-
-static int __nvm_configure_remove(struct nvm_ioctl_remove *remove)
-{
- struct nvm_target *t;
-
- down_write(&nvm_lock);
- t = nvm_find_target(remove->tgtname);
- if (!t) {
- pr_err("nvm: target \"%s\" doesn't exist.\n", remove->tgtname);
- up_write(&nvm_lock);
- return -EINVAL;
- }
-
- nvm_remove_target(t);
- up_write(&nvm_lock);
-
- return 0;
+ return dev->mt->create_tgt(dev, create);
}
#ifdef CONFIG_NVM_DEBUG
@@ -950,8 +815,9 @@ static int nvm_configure_show(const char *val)
static int nvm_configure_remove(const char *val)
{
struct nvm_ioctl_remove remove;
+ struct nvm_dev *dev;
char opcode;
- int ret;
+ int ret = 0;
ret = sscanf(val, "%c %256s", &opcode, remove.tgtname);
if (ret != 2) {
@@ -961,7 +827,13 @@ static int nvm_configure_remove(const char *val)
remove.flags = 0;
- return __nvm_configure_remove(&remove);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ ret = dev->mt->remove_tgt(dev, &remove);
+ if (!ret)
+ break;
+ }
+
+ return ret;
}
static int nvm_configure_create(const char *val)
@@ -1158,6 +1030,8 @@ static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
{
struct nvm_ioctl_remove remove;
+ struct nvm_dev *dev;
+ int ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -1172,7 +1046,13 @@ static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
return -EINVAL;
}
- return __nvm_configure_remove(&remove);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ ret = dev->mt->remove_tgt(dev, &remove);
+ if (!ret)
+ break;
+ }
+
+ return ret;
}
static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 20:51:16 +0000