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iomap: introduce iomap_fsverity_write() for writing fsverity metadata

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This is just a wrapper around iomap_file_buffered_write() to create
necessary iterator over metadata.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Link: https://patch.msgid.link/20260520123722.405752-10-aalbersh@kernel.org
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Andrey Albershteyn 2026-05-20 14:37:07 +02:00 committed by Christian Brauner
parent 1d14073175
commit 36a36c4cac
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2 changed files with 28 additions and 0 deletions
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25
fs/iomap/buffered-io.c
View File

@ -1290,6 +1290,31 @@ iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i,
}
EXPORT_SYMBOL_GPL(iomap_file_buffered_write);
int iomap_fsverity_write(struct file *file, loff_t pos, size_t length,
const void *buf, const struct iomap_ops *ops,
const struct iomap_write_ops *write_ops)
{
int ret;
struct iov_iter iiter;
struct kvec kvec = {
.iov_base = (void *)buf,
.iov_len = length,
};
struct kiocb iocb = {
.ki_filp = file,
.ki_ioprio = get_current_ioprio(),
.ki_pos = pos,
};
iov_iter_kvec(&iiter, WRITE, &kvec, 1, length);
ret = iomap_file_buffered_write(&iocb, &iiter, ops, write_ops, NULL);
if (ret < 0)
return ret;
return ret == length ? 0 : -EIO;
}
EXPORT_SYMBOL_GPL(iomap_fsverity_write);
static void iomap_write_delalloc_ifs_punch(struct inode *inode,
struct folio *folio, loff_t start_byte, loff_t end_byte,
struct iomap *iomap, iomap_punch_t punch)

3
include/linux/iomap.h
View File

@ -353,6 +353,9 @@ static inline bool iomap_want_unshare_iter(const struct iomap_iter *iter)
ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from,
const struct iomap_ops *ops,
const struct iomap_write_ops *write_ops, void *private);
int iomap_fsverity_write(struct file *file, loff_t pos, size_t length,
const void *buf, const struct iomap_ops *ops,
const struct iomap_write_ops *write_ops);
void iomap_read_folio(const struct iomap_ops *ops,
struct iomap_read_folio_ctx *ctx, void *private);
void iomap_readahead(const struct iomap_ops *ops,