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btrfs: drop lock parameter from update_ioctl_balance_args and rename

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The parameter controls locking of the stats part but we can lock it
unconditionally, as this only happens once when balance starts. This is
not performance critical.

Add the prefix for an exported function.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-03-21 02:05:27 +01:00
parent cf7d20f447
commit 008ef0969d
3 changed files with 9 additions and 11 deletions
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4
fs/btrfs/ctree.h
View file

@ -3267,7 +3267,9 @@ int btrfs_is_empty_uuid(u8 *uuid);
int btrfs_defrag_file(struct inode *inode, struct file *file,
struct btrfs_ioctl_defrag_range_args *range,
u64 newer_than, unsigned long max_pages);
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
void btrfs_get_block_group_info(struct list_head *groups_list,
struct btrfs_ioctl_space_info *space);
void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_balance_args *bargs);
ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
struct file *dst_file, u64 dst_loff);

14
fs/btrfs/ioctl.c
View file

@ -4305,7 +4305,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_fs_info *fs_info,
return ret;
}
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_balance_args *bargs)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
@ -4323,13 +4323,9 @@ void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
memcpy(&bargs->meta, &bctl->meta, sizeof(bargs->meta));
memcpy(&bargs->sys, &bctl->sys, sizeof(bargs->sys));
if (lock) {
spin_lock(&fs_info->balance_lock);
memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat));
spin_unlock(&fs_info->balance_lock);
} else {
memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat));
}
spin_lock(&fs_info->balance_lock);
memcpy(&bargs->stat, &bctl->stat, sizeof(bargs->stat));
spin_unlock(&fs_info->balance_lock);
}
static long btrfs_ioctl_balance(struct file *file, void __user *arg)
@ -4515,7 +4511,7 @@ static long btrfs_ioctl_balance_progress(struct btrfs_fs_info *fs_info,
goto out;
}
update_ioctl_balance_args(fs_info, 1, bargs);
btrfs_update_ioctl_balance_args(fs_info, bargs);
if (copy_to_user(arg, bargs, sizeof(*bargs)))
ret = -EFAULT;

2
fs/btrfs/volumes.c
View file

@ -3918,7 +3918,7 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
if (bargs) {
memset(bargs, 0, sizeof(*bargs));
update_ioctl_balance_args(fs_info, 0, bargs);
btrfs_update_ioctl_balance_args(fs_info, bargs);
}
if ((ret && ret != -ECANCELED && ret != -ENOSPC) ||