diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/lightnvm/core.c | 198 | ||||
| -rw-r--r-- | drivers/lightnvm/gennvm.c | 154 | ||||
| -rw-r--r-- | drivers/lightnvm/gennvm.h | 3 |
3 files changed, 196 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) diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c index 3d2762f2a6fe..41760b24bea7 100644 --- a/drivers/lightnvm/gennvm.c +++ b/drivers/lightnvm/gennvm.c @@ -20,6 +20,144 @@ #include "gennvm.h" +static struct nvm_target *gen_find_target(struct gen_dev *gn, const char *name) +{ + struct nvm_target *tgt; + + list_for_each_entry(tgt, &gn->targets, list) + if (!strcmp(name, tgt->disk->disk_name)) + return tgt; + + return NULL; +} + +static const struct block_device_operations gen_fops = { + .owner = THIS_MODULE, +}; + +static int gen_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) +{ + struct gen_dev *gn = dev->mp; + 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; + + tt = nvm_find_target_type(create->tgttype, 1); + if (!tt) { + pr_err("nvm: target type %s not found\n", create->tgttype); + return -EINVAL; + } + + mutex_lock(&gn->lock); + t = gen_find_target(gn, create->tgtname); + if (t) { + pr_err("nvm: target name already exists.\n"); + mutex_unlock(&gn->lock); + return -EINVAL; + } + mutex_unlock(&gn->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 = &gen_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; + + mutex_lock(&gn->lock); + list_add_tail(&t->list, &gn->targets); + mutex_unlock(&gn->lock); + + return 0; +err_init: + put_disk(tdisk); +err_queue: + blk_cleanup_queue(tqueue); +err_t: + kfree(t); + return -ENOMEM; +} + +static void __gen_remove_target(struct nvm_target *t) +{ + struct nvm_tgt_type *tt = t->type; + struct gendisk *tdisk = t->disk; + struct request_queue *q = tdisk->queue; + + del_gendisk(tdisk); + blk_cleanup_queue(q); + + if (tt->exit) + tt->exit(tdisk->private_data); + + put_disk(tdisk); + + list_del(&t->list); + kfree(t); +} + +/** + * gen_remove_tgt - Removes a target from the media manager + * @dev: device + * @remove: ioctl structure with target name to remove. + * + * Returns: + * 0: on success + * 1: on not found + * <0: on error + */ +static int gen_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) +{ + struct gen_dev *gn = dev->mp; + struct nvm_target *t; + + if (!gn) + return 1; + + mutex_lock(&gn->lock); + t = gen_find_target(gn, remove->tgtname); + if (!t) { + mutex_unlock(&gn->lock); + return 1; + } + __gen_remove_target(t); + mutex_unlock(&gn->lock); + + return 0; +} + static int gen_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len) { struct gen_dev *gn = dev->mp; @@ -295,6 +433,8 @@ static int gen_register(struct nvm_dev *dev) gn->dev = dev; gn->nr_luns = dev->nr_luns; INIT_LIST_HEAD(&gn->area_list); + mutex_init(&gn->lock); + INIT_LIST_HEAD(&gn->targets); dev->mp = gn; ret = gen_luns_init(dev, gn); @@ -318,6 +458,17 @@ err: static void gen_unregister(struct nvm_dev *dev) { + struct gen_dev *gn = dev->mp; + struct nvm_target *t, *tmp; + + mutex_lock(&gn->lock); + list_for_each_entry_safe(t, tmp, &gn->targets, list) { + if (t->dev != dev) + continue; + __gen_remove_target(t); + } + mutex_unlock(&gn->lock); + gen_free(dev); module_put(THIS_MODULE); } @@ -515,6 +666,9 @@ static struct nvmm_type gen = { .register_mgr = gen_register, .unregister_mgr = gen_unregister, + .create_tgt = gen_create_tgt, + .remove_tgt = gen_remove_tgt, + .get_blk_unlocked = gen_get_blk_unlocked, .put_blk_unlocked = gen_put_blk_unlocked, diff --git a/drivers/lightnvm/gennvm.h b/drivers/lightnvm/gennvm.h index bf0621963c7c..8ecfa817d21d 100644 --- a/drivers/lightnvm/gennvm.h +++ b/drivers/lightnvm/gennvm.h @@ -40,6 +40,9 @@ struct gen_dev { int nr_luns; struct gen_lun *luns; struct list_head area_list; + + struct mutex lock; + struct list_head targets; }; struct gen_area { |