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fscrypt: move fscrypt_set_bio_crypt_ctx_bh to buffer.c

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fscrypt_set_bio_crypt_ctx_bh is only used by submit_bh_wbc now.  Move it
there and merge bh_get_inode_and_lblk_num into it.

Note that this does not add ifdefs for fscrypt as the compiler will
optimize away the dead code if it is not built in.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20260302141922.370070-6-hch@lst.de
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
This commit is contained in:
Christoph Hellwig
2026-03-02 06:18:10 -08:00
committed by Eric Biggers
parent 588e7c048d
commit a18b1ab816
3 changed files with 20 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/buffer.c
+20 -1
View File
@@ -2774,6 +2774,24 @@ static void end_bio_bh_io_sync(struct bio *bio)
bio_put(bio);
}
static void buffer_set_crypto_ctx(struct bio *bio, const struct buffer_head *bh,
gfp_t gfp_mask)
{
const struct address_space *mapping = folio_mapping(bh->b_folio);
const struct inode *inode;
u64 lblk;
/*
* The ext4 journal (jbd2) can submit a buffer_head it directly created
* for a non-pagecache page. fscrypt doesn't care about these.
*/
if (!mapping)
return;
inode = mapping->host;
lblk = (folio_pos(bh->b_folio) + bh_offset(bh)) >> inode->i_blkbits;
fscrypt_set_bio_crypt_ctx(bio, inode, lblk, gfp_mask);
}
static void submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh,
enum rw_hint write_hint,
struct writeback_control *wbc)
@@ -2800,7 +2818,8 @@ static void submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh,
bio = bio_alloc(bh->b_bdev, 1, opf, GFP_NOIO);
fscrypt_set_bio_crypt_ctx_bh(bio, bh, GFP_NOIO);
if (IS_ENABLED(CONFIG_FS_ENCRYPTION))
buffer_set_crypto_ctx(bio, bh, GFP_NOIO);
bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
bio->bi_write_hint = write_hint;
fs/crypto/inline_crypt.c
-45
View File
@@ -314,51 +314,6 @@ void fscrypt_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,
}
EXPORT_SYMBOL_GPL(fscrypt_set_bio_crypt_ctx);
/* Extract the inode and logical block number from a buffer_head. */
static bool bh_get_inode_and_lblk_num(const struct buffer_head *bh,
const struct inode **inode_ret,
u64 *lblk_num_ret)
{
struct folio *folio = bh->b_folio;
const struct address_space *mapping;
const struct inode *inode;
/*
* The ext4 journal (jbd2) can submit a buffer_head it directly created
* for a non-pagecache page. fscrypt doesn't care about these.
*/
mapping = folio_mapping(folio);
if (!mapping)
return false;
inode = mapping->host;
*inode_ret = inode;
*lblk_num_ret = (folio_pos(folio) + bh_offset(bh)) >> inode->i_blkbits;
return true;
}
/**
* fscrypt_set_bio_crypt_ctx_bh() - prepare a file contents bio for inline
* crypto
* @bio: a bio which will eventually be submitted to the file
* @first_bh: the first buffer_head for which I/O will be submitted
* @gfp_mask: memory allocation flags
*
* Same as fscrypt_set_bio_crypt_ctx(), except this takes a buffer_head instead
* of an inode and block number directly.
*/
void fscrypt_set_bio_crypt_ctx_bh(struct bio *bio,
const struct buffer_head *first_bh,
gfp_t gfp_mask)
{
const struct inode *inode;
u64 first_lblk;
if (bh_get_inode_and_lblk_num(first_bh, &inode, &first_lblk))
fscrypt_set_bio_crypt_ctx(bio, inode, first_lblk, gfp_mask);
}
EXPORT_SYMBOL_GPL(fscrypt_set_bio_crypt_ctx_bh);
/**
* fscrypt_mergeable_bio() - test whether data can be added to a bio
* @bio: the bio being built up
include/linux/fscrypt.h
-9
View File
@@ -869,10 +869,6 @@ void fscrypt_set_bio_crypt_ctx(struct bio *bio,
const struct inode *inode, u64 first_lblk,
gfp_t gfp_mask);
void fscrypt_set_bio_crypt_ctx_bh(struct bio *bio,
const struct buffer_head *first_bh,
gfp_t gfp_mask);
bool fscrypt_mergeable_bio(struct bio *bio, const struct inode *inode,
u64 next_lblk);
@@ -891,11 +887,6 @@ static inline void fscrypt_set_bio_crypt_ctx(struct bio *bio,
const struct inode *inode,
u64 first_lblk, gfp_t gfp_mask) { }
static inline void fscrypt_set_bio_crypt_ctx_bh(
struct bio *bio,
const struct buffer_head *first_bh,
gfp_t gfp_mask) { }
static inline bool fscrypt_mergeable_bio(struct bio *bio,
const struct inode *inode,
u64 next_lblk)