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Commit 4823d49c authored by Vivek Goyal's avatar Vivek Goyal Committed by Miklos Szeredi
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ovl: Add helper ovl_inode_realdata() 



Add an helper to retrieve real data inode associated with overlay inode.
This helper will ignore all metacopy inodes and will return only the real
inode which has data.

Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
Reviewed-by: default avatarAmir Goldstein <amir73il@gmail.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 2664bd08

fs/overlayfs/overlayfs.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -229,6 +229,7 @@ struct inode *ovl_inode_upper(struct inode *inode); 
struct inode *ovl_inode_lower(struct inode *inode);

struct inode *ovl_inode_lower(struct inode *inode);

struct inode *ovl_inode_lowerdata(struct inode *inode);

struct inode *ovl_inode_lowerdata(struct inode *inode);

struct inode *ovl_inode_real(struct inode *inode);

struct inode *ovl_inode_real(struct inode *inode);

struct inode *ovl_inode_realdata(struct inode *inode);

struct ovl_dir_cache *ovl_dir_cache(struct inode *inode);

struct ovl_dir_cache *ovl_dir_cache(struct inode *inode);

void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache);

void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache);

void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry);

void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry);

fs/overlayfs/util.c

+12 −0
Original line number Original line Diff line number Diff line
@@ -256,6 +256,18 @@ struct inode *ovl_inode_lowerdata(struct inode *inode) 
	return OVL_I(inode)->lowerdata ?: ovl_inode_lower(inode);

	return OVL_I(inode)->lowerdata ?: ovl_inode_lower(inode);

}

}





/* Return real inode which contains data. Does not return metacopy inode */

struct inode *ovl_inode_realdata(struct inode *inode)

{

	struct inode *upperinode;



	upperinode = ovl_inode_upper(inode);

	if (upperinode && ovl_has_upperdata(inode))

		return upperinode;



	return ovl_inode_lowerdata(inode);

}



struct ovl_dir_cache *ovl_dir_cache(struct inode *inode)

struct ovl_dir_cache *ovl_dir_cache(struct inode *inode)

{

{

	return OVL_I(inode)->cache;

	return OVL_I(inode)->cache;