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btrfs: export and rename free_device

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The function will be used outside of volumes.c, the allocation
btrfs_alloc_device is also exported.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-03-20 15:47:33 +01:00
parent 6fc4749d25
commit a425f9d475
2 changed files with 13 additions and 12 deletions
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24
fs/btrfs/volumes.c
View File

@ -269,7 +269,7 @@ static struct btrfs_fs_devices *alloc_fs_devices(const u8 *fsid)
return fs_devs;
}
static void free_device(struct btrfs_device *device)
void btrfs_free_device(struct btrfs_device *device)
{
rcu_string_free(device->name);
bio_put(device->flush_bio);
@ -284,7 +284,7 @@ static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
device = list_entry(fs_devices->devices.next,
struct btrfs_device, dev_list);
list_del(&device->dev_list);
free_device(device);
btrfs_free_device(device);
}
kfree(fs_devices);
}
@ -317,7 +317,7 @@ void __exit btrfs_cleanup_fs_uuids(void)
/*
* Returns a pointer to a new btrfs_device on success; ERR_PTR() on error.
* Returned struct is not linked onto any lists and must be destroyed using
* free_device.
* btrfs_free_device.
*/
static struct btrfs_device *__alloc_device(void)
{
@ -672,7 +672,7 @@ static void btrfs_free_stale_devices(const char *path,
} else {
fs_devs->num_devices--;
list_del(&dev->dev_list);
free_device(dev);
btrfs_free_device(dev);
}
}
}
@ -787,7 +787,7 @@ static noinline struct btrfs_device *device_list_add(const char *path,
name = rcu_string_strdup(path, GFP_NOFS);
if (!name) {
free_device(device);
btrfs_free_device(device);
return ERR_PTR(-ENOMEM);
}
rcu_assign_pointer(device->name, name);
@ -900,7 +900,7 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
name = rcu_string_strdup(orig_dev->name->str,
GFP_KERNEL);
if (!name) {
free_device(device);
btrfs_free_device(device);
goto error;
}
rcu_assign_pointer(device->name, name);
@ -972,7 +972,7 @@ again:
}
list_del_init(&device->dev_list);
fs_devices->num_devices--;
free_device(device);
btrfs_free_device(device);
}
if (fs_devices->seed) {
@ -990,7 +990,7 @@ static void free_device_rcu(struct rcu_head *head)
struct btrfs_device *device;
device = container_of(head, struct btrfs_device, rcu);
free_device(device);
btrfs_free_device(device);
}
static void btrfs_close_bdev(struct btrfs_device *device)
@ -2602,7 +2602,7 @@ error_trans:
if (trans)
btrfs_end_transaction(trans);
error_free_device:
free_device(device);
btrfs_free_device(device);
error:
blkdev_put(bdev, FMODE_EXCL);
if (seeding_dev && !unlocked) {
@ -2673,7 +2673,7 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
name = rcu_string_strdup(device_path, GFP_KERNEL);
if (!name) {
free_device(device);
btrfs_free_device(device);
ret = -ENOMEM;
goto error;
}
@ -6448,7 +6448,7 @@ static struct btrfs_device *add_missing_dev(struct btrfs_fs_devices *fs_devices,
*
* Return: a pointer to a new &struct btrfs_device on success; ERR_PTR()
* on error. Returned struct is not linked onto any lists and must be
* destroyed with free_device.
* destroyed with btrfs_free_device.
*/
struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
const u64 *devid,
@ -6471,7 +6471,7 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
ret = find_next_devid(fs_info, &tmp);
if (ret) {
free_device(dev);
btrfs_free_device(dev);
return ERR_PTR(ret);
}
}

1
fs/btrfs/volumes.h
View File

@ -421,6 +421,7 @@ int btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, u64 devid,
struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
const u64 *devid,
const u8 *uuid);
void btrfs_free_device(struct btrfs_device *device);
int btrfs_rm_device(struct btrfs_fs_info *fs_info,
const char *device_path, u64 devid);
void __exit btrfs_cleanup_fs_uuids(void);