Re: [PATCH] vfs: inline new_inode_pseudo() and de-staticize alloc_inode()

From: Jan Kara
Date: Wed Feb 19 2025 - 11:13:12 EST


On Wed 12-02-25 19:04:59, Mateusz Guzik wrote:
> The former is a no-op wrapper with the same argument.
>
> I left it in place to not lose the information who needs it -- one day
> "pseudo" inodes may start differing from what alloc_inode() returns.
>
> In the meantime no point taking a detour.
>
> Signed-off-by: Mateusz Guzik <mjguzik@xxxxxxxxx>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@xxxxxxx>

Honza

> ---
> fs/inode.c | 29 ++++++++++++-----------------
> include/linux/fs.h | 6 +++++-
> 2 files changed, 17 insertions(+), 18 deletions(-)
>
> diff --git a/fs/inode.c b/fs/inode.c
> index 5587aabdaa5e..6e251e43bf70 100644
> --- a/fs/inode.c
> +++ b/fs/inode.c
> @@ -327,7 +327,17 @@ static void i_callback(struct rcu_head *head)
> free_inode_nonrcu(inode);
> }
>
> -static struct inode *alloc_inode(struct super_block *sb)
> +/**
> + * alloc_inode - obtain an inode
> + * @sb: superblock
> + *
> + * Allocates a new inode for given superblock.
> + * Inode wont be chained in superblock s_inodes list
> + * This means :
> + * - fs can't be unmount
> + * - quotas, fsnotify, writeback can't work
> + */
> +struct inode *alloc_inode(struct super_block *sb)
> {
> const struct super_operations *ops = sb->s_op;
> struct inode *inode;
> @@ -1159,21 +1169,6 @@ unsigned int get_next_ino(void)
> }
> EXPORT_SYMBOL(get_next_ino);
>
> -/**
> - * new_inode_pseudo - obtain an inode
> - * @sb: superblock
> - *
> - * Allocates a new inode for given superblock.
> - * Inode wont be chained in superblock s_inodes list
> - * This means :
> - * - fs can't be unmount
> - * - quotas, fsnotify, writeback can't work
> - */
> -struct inode *new_inode_pseudo(struct super_block *sb)
> -{
> - return alloc_inode(sb);
> -}
> -
> /**
> * new_inode - obtain an inode
> * @sb: superblock
> @@ -1190,7 +1185,7 @@ struct inode *new_inode(struct super_block *sb)
> {
> struct inode *inode;
>
> - inode = new_inode_pseudo(sb);
> + inode = alloc_inode(sb);
> if (inode)
> inode_sb_list_add(inode);
> return inode;
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 640949116cf9..ac5d699e3aab 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -3287,7 +3287,11 @@ static inline void __iget(struct inode *inode)
> extern void iget_failed(struct inode *);
> extern void clear_inode(struct inode *);
> extern void __destroy_inode(struct inode *);
> -extern struct inode *new_inode_pseudo(struct super_block *sb);
> +struct inode *alloc_inode(struct super_block *sb);
> +static inline struct inode *new_inode_pseudo(struct super_block *sb)
> +{
> + return alloc_inode(sb);
> +}
> extern struct inode *new_inode(struct super_block *sb);
> extern void free_inode_nonrcu(struct inode *inode);
> extern int setattr_should_drop_suidgid(struct mnt_idmap *, struct inode *);
> --
> 2.43.0
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR