RE: [f2fs-dev] [PATCH 02/11] f2fs: punch the core function for inode management

[Chao Yu]

> -----Original Message-----
> From: Jaegeuk Kim [mailto:jaegeuk@xxxxxxxxxx]
> Sent: Saturday, July 26, 2014 6:47 AM
> To: linux-kernel@xxxxxxxxxxxxxxx; linux-fsdevel@xxxxxxxxxxxxxxx;
> linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Jaegeuk Kim
> Subject: [f2fs-dev] [PATCH 02/11] f2fs: punch the core function for inode management
> 
> This patch punches out the core functions to manage the inode numbers.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>

Reviewed-by: Chao Yu <chao2.yu@xxxxxxxxxxx>

> ---
>  fs/f2fs/checkpoint.c | 81 ++++++++++++++++++++++++++++------------------------
>  1 file changed, 44 insertions(+), 37 deletions(-)
> 
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index 0b4710c..3e3c2c3 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -282,6 +282,47 @@ const struct address_space_operations f2fs_meta_aops = {
>  	.set_page_dirty	= f2fs_set_meta_page_dirty,
>  };
> 
> +static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino)
> +{
> +	struct list_head *head;
> +	struct ino_entry *new, *e;
> +
> +	new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
> +	new->ino = ino;
> +
> +	spin_lock(&sbi->orphan_inode_lock);
> +	list_for_each_entry(e, &sbi->orphan_inode_list, list) {
> +		if (e->ino == ino) {
> +			spin_unlock(&sbi->orphan_inode_lock);
> +			kmem_cache_free(orphan_entry_slab, new);
> +			return;
> +		}
> +		if (e->ino > ino)
> +			break;
> +	}
> +
> +	/* add new entry into list which is sorted by inode number */
> +	list_add_tail(&new->list, &e->list);
> +	spin_unlock(&sbi->orphan_inode_lock);
> +}
> +
> +static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino)
> +{
> +	struct ino_entry *e;
> +
> +	spin_lock(&sbi->orphan_inode_lock);
> +	list_for_each_entry(e, &sbi->orphan_inode_list, list) {
> +		if (e->ino == ino) {
> +			list_del(&e->list);
> +			sbi->n_orphans--;
> +			spin_unlock(&sbi->orphan_inode_lock);
> +			kmem_cache_free(orphan_entry_slab, e);
> +			return;
> +		}
> +	}
> +	spin_unlock(&sbi->orphan_inode_lock);
> +}
> +
>  int acquire_orphan_inode(struct f2fs_sb_info *sbi)
>  {
>  	int err = 0;
> @@ -306,48 +347,14 @@ void release_orphan_inode(struct f2fs_sb_info *sbi)
> 
>  void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
>  {
> -	struct list_head *head;
> -	struct orphan_inode_entry *new, *orphan;
> -
> -	new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
> -	new->ino = ino;
> -
> -	spin_lock(&sbi->orphan_inode_lock);
> -	head = &sbi->orphan_inode_list;
> -	list_for_each_entry(orphan, head, list) {
> -		if (orphan->ino == ino) {
> -			spin_unlock(&sbi->orphan_inode_lock);
> -			kmem_cache_free(orphan_entry_slab, new);
> -			return;
> -		}
> -
> -		if (orphan->ino > ino)
> -			break;
> -	}
> -
>  	/* add new orphan entry into list which is sorted by inode number */
> -	list_add_tail(&new->list, &orphan->list);
> -	spin_unlock(&sbi->orphan_inode_lock);
> +	__add_ino_entry(sbi, ino);
>  }
> 
>  void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
>  {
> -	struct list_head *head;
> -	struct orphan_inode_entry *orphan;
> -
> -	spin_lock(&sbi->orphan_inode_lock);
> -	head = &sbi->orphan_inode_list;
> -	list_for_each_entry(orphan, head, list) {
> -		if (orphan->ino == ino) {
> -			list_del(&orphan->list);
> -			f2fs_bug_on(sbi->n_orphans == 0);
> -			sbi->n_orphans--;
> -			spin_unlock(&sbi->orphan_inode_lock);
> -			kmem_cache_free(orphan_entry_slab, orphan);
> -			return;
> -		}
> -	}
> -	spin_unlock(&sbi->orphan_inode_lock);
> +	/* remove orphan entry from orphan list */
> +	__remove_ino_entry(sbi, ino);
>  }
> 
>  static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
> --
> 1.8.5.2 (Apple Git-48)
> 
> 
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