From: Andrey Albershteyn Date: Wed, 20 May 2026 12:37:07 +0000 (+0200) Subject: iomap: introduce iomap_fsverity_write() for writing fsverity metadata X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36a36c4cac914510123071fb58270f6380faed1b;p=thirdparty%2Flinux.git iomap: introduce iomap_fsverity_write() for writing fsverity metadata This is just a wrapper around iomap_file_buffered_write() to create necessary iterator over metadata. Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Andrey Albershteyn Link: https://patch.msgid.link/20260520123722.405752-10-aalbersh@kernel.org Reviewed-by: "Darrick J. Wong" Signed-off-by: Christian Brauner (Amutable) --- diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index f9cc5a32e222d..dab4aacff313a 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -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) diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 1be2e16b696a8..3582ed1fe2361 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -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,