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lightnvm: allow targets to use sysfs

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In order to register through the sysfs interface, a driver needs to know
its kobject. On a disk structure, this happens when the partition
information is added (device_add_disk), which for lightnvm takes place
after the target has been initialized. This means that on target
initialization, the kboject has not been created yet.

This patch adds a target function to let targets initialize their own
kboject as a child of the disk kobject.

Signed-off-by: Javier González <[email protected]>
Added exit typedef and passed gendisk instead of void pointer for exit.
Signed-off-by: Matias Bjørling <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Javier González 2017-01-31 13:17:20 +01:00 • committed by Jens Axboe
commit 9a69b0ed62
2 changed files with 15 additions and 0 deletions
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9
drivers/lightnvm/core.c
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@ -289,6 +289,9 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
set_capacity(tdisk, tt->capacity(targetdata));
add_disk(tdisk);
if (tt->sysfs_init && tt->sysfs_init(tdisk))
goto err_sysfs;
t->type = tt;
t->disk = tdisk;
t->dev = tgt_dev;
@ -298,6 +301,9 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
mutex_unlock(&dev->mlock);
return 0;
err_sysfs:
if (tt->exit)
tt->exit(targetdata);
err_init:
put_disk(tdisk);
err_queue:
@ -320,6 +326,9 @@ static void __nvm_remove_target(struct nvm_target *t)
del_gendisk(tdisk);
blk_cleanup_queue(q);
if (tt->sysfs_exit)
tt->sysfs_exit(tdisk);
if (tt->exit)
tt->exit(tdisk->private_data);