Commit c76e14dc authored by Matthew Wilcox's avatar Matthew Wilcox Committed by Theodore Ts'o
Browse files

fscrypt: Add some folio helper functions 



fscrypt_is_bounce_folio() is the equivalent of fscrypt_is_bounce_page()
and fscrypt_pagecache_folio() is the equivalent of fscrypt_pagecache_page().

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarRitesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20230324180129.1220691-3-willy@infradead.org


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent e999a5c5

include/linux/fscrypt.h

+21 −0
Original line number Diff line number Diff line
@@ -273,6 +273,16 @@ static inline struct page *fscrypt_pagecache_page(struct page *bounce_page) 
	return (struct page *)page_private(bounce_page);

}



static inline bool fscrypt_is_bounce_folio(struct folio *folio)

{

	return folio->mapping == NULL;

}



static inline struct folio *fscrypt_pagecache_folio(struct folio *bounce_folio)

{

	return bounce_folio->private;

}



void fscrypt_free_bounce_page(struct page *bounce_page);



/* policy.c */
@@ -445,6 +455,17 @@ static inline struct page *fscrypt_pagecache_page(struct page *bounce_page) 
	return ERR_PTR(-EINVAL);

}



static inline bool fscrypt_is_bounce_folio(struct folio *folio)

{

	return false;

}



static inline struct folio *fscrypt_pagecache_folio(struct folio *bounce_folio)

{

	WARN_ON_ONCE(1);

	return ERR_PTR(-EINVAL);

}



static inline void fscrypt_free_bounce_page(struct page *bounce_page)

{

}