fscrypt: Remove unused functions and workqueue

Remove functions that are no longer used:

- fscrypt_decrypt_bio()
- fscrypt_decrypt_pagecache_blocks()
- fscrypt_inode_uses_fs_layer_crypto()
- fscrypt_inode_uses_inline_crypto()
- fscrypt_enqueue_decrypt_work()

This makes the decryption workqueue unused, so remove it too.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260713023708.9245-16-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

1 files changed, 0 insertions, 47 deletions

diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h
index 96c7af05424c..03c0f50bb6f6 100644
--- a/include/linux/fscrypt.h
+++ b/include/linux/fscrypt.h
@@ -345,7 +345,6 @@ static inline void fscrypt_prepare_dentry(struct dentry *dentry,
 }
 
 /* crypto.c */
-void fscrypt_enqueue_decrypt_work(struct work_struct *);
 
 struct page *fscrypt_encrypt_pagecache_blocks(struct folio *folio,
 		size_t len, size_t offs, gfp_t gfp_flags);
@@ -353,8 +352,6 @@ int fscrypt_encrypt_block_inplace(const struct inode *inode, struct page *page,
 				  unsigned int len, unsigned int offs,
 				  u64 lblk_num);
 
-int fscrypt_decrypt_pagecache_blocks(struct folio *folio, size_t len,
-				     size_t offs);
 int fscrypt_decrypt_block_inplace(const struct inode *inode, struct page *page,
 				  unsigned int len, unsigned int offs,
 				  u64 lblk_num);
@@ -452,7 +449,6 @@ bool fscrypt_match_name(const struct fscrypt_name *fname,
 u64 fscrypt_fname_siphash(const struct inode *dir, const struct qstr *name);
 
 /* bio.c */
-bool fscrypt_decrypt_bio(struct bio *bio);
 int fscrypt_zeroout_range(const struct inode *inode, loff_t pos,
 			  sector_t sector, u64 len);
 
@@ -512,9 +508,6 @@ static inline void fscrypt_prepare_dentry(struct dentry *dentry,
 }
 
 /* crypto.c */
-static inline void fscrypt_enqueue_decrypt_work(struct work_struct *work)
-{
-}
 
 static inline struct page *fscrypt_encrypt_pagecache_blocks(struct folio *folio,
 		size_t len, size_t offs, gfp_t gfp_flags)
@@ -530,12 +523,6 @@ static inline int fscrypt_encrypt_block_inplace(const struct inode *inode,
 	return -EOPNOTSUPP;
 }
 
-static inline int fscrypt_decrypt_pagecache_blocks(struct folio *folio,
-						   size_t len, size_t offs)
-{
-	return -EOPNOTSUPP;
-}
-
 static inline int fscrypt_decrypt_block_inplace(const struct inode *inode,
 						struct page *page,
 						unsigned int len,
@@ -753,10 +740,6 @@ static inline int fscrypt_d_revalidate(struct inode *dir, const struct qstr *nam
 }
 
 /* bio.c */
-static inline bool fscrypt_decrypt_bio(struct bio *bio)
-{
-	return true;
-}
 
 static inline int fscrypt_zeroout_range(const struct inode *inode, loff_t pos,
 					sector_t sector, u64 len)
@@ -895,36 +878,6 @@ static inline u64 fscrypt_limit_io_blocks(const struct inode *inode, u64 lblk,
 #endif /* !CONFIG_FS_ENCRYPTION_INLINE_CRYPT */
 
 /**
- * fscrypt_inode_uses_inline_crypto() - test whether an inode uses inline
- *					encryption
- * @inode: an inode. If encrypted, its key must be set up.
- *
- * Return: true if the inode requires file contents encryption and if the
- *	   encryption should be done in the block layer via blk-crypto rather
- *	   than in the filesystem layer.
- */
-static inline bool fscrypt_inode_uses_inline_crypto(const struct inode *inode)
-{
-	return fscrypt_needs_contents_encryption(inode) &&
-	       inode->i_sb->s_cop->is_block_based;
-}
-
-/**
- * fscrypt_inode_uses_fs_layer_crypto() - test whether an inode uses fs-layer
- *					  encryption
- * @inode: an inode. If encrypted, its key must be set up.
- *
- * Return: true if the inode requires file contents encryption and if the
- *	   encryption should be done in the filesystem layer rather than in the
- *	   block layer via blk-crypto.
- */
-static inline bool fscrypt_inode_uses_fs_layer_crypto(const struct inode *inode)
-{
-	return fscrypt_needs_contents_encryption(inode) &&
-	       !inode->i_sb->s_cop->is_block_based;
-}
-
-/**
  * fscrypt_has_encryption_key() - check whether an inode has had its key set up
  * @inode: the inode to check
  *