Commit 61ba64fc authored by Al Viro's avatar Al Viro
Browse files

libfs: simple_follow_link() 



let "fast" symlinks store the pointer to the body into ->i_link and
use simple_follow_link for ->follow_link()

Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent a7a67e8a

fs/inode.c

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) 
	inode->i_pipe = NULL;

	inode->i_bdev = NULL;

	inode->i_cdev = NULL;

	inode->i_link = NULL;

	inode->i_rdev = 0;

	inode->dirtied_when = 0;

fs/libfs.c

+13 −0
Original line number Diff line number Diff line
@@ -1093,3 +1093,16 @@ simple_nosetlease(struct file *filp, long arg, struct file_lock **flp, 
	return -EINVAL;

}

EXPORT_SYMBOL(simple_nosetlease);



void *simple_follow_link(struct dentry *dentry, struct nameidata *nd)

{

	nd_set_link(nd, d_inode(dentry)->i_link);

	return NULL;

}

EXPORT_SYMBOL(simple_follow_link);



const struct inode_operations simple_symlink_inode_operations = {

	.follow_link = simple_follow_link,

	.readlink = generic_readlink

};

EXPORT_SYMBOL(simple_symlink_inode_operations);

include/linux/fs.h

+3 −0
Original line number Diff line number Diff line
@@ -656,6 +656,7 @@ struct inode { 
		struct pipe_inode_info	*i_pipe;

		struct block_device	*i_bdev;

		struct cdev		*i_cdev;

		char			*i_link;

	};



	__u32			i_generation;
@@ -2721,6 +2722,8 @@ void __inode_sub_bytes(struct inode *inode, loff_t bytes); 
void inode_sub_bytes(struct inode *inode, loff_t bytes);

loff_t inode_get_bytes(struct inode *inode);

void inode_set_bytes(struct inode *inode, loff_t bytes);

void *simple_follow_link(struct dentry *, struct nameidata *);

extern const struct inode_operations simple_symlink_inode_operations;



extern int iterate_dir(struct file *, struct dir_context *);

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