move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 395 deletions

diff --git a/linux/bio.c b/linux/bio.c
deleted file mode 100644
index 93a791c4..00000000
--- a/linux/bio.c
+++ /dev/null
@@ -1,395 +0,0 @@
-/*
- * Copyright (C) 2001 Jens Axboe <axboe@kernel.dk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public Licens
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
- *
- */
-#include <linux/bio.h>
-#include <linux/blkdev.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-
-static const struct {
-	int		err;
-	const char	*name;
-} blk_errors[] = {
-	[BLK_STS_OK]		= { 0,		"" },
-	[BLK_STS_NOTSUPP]	= { -EOPNOTSUPP, "operation not supported" },
-	[BLK_STS_TIMEOUT]	= { -ETIMEDOUT,	"timeout" },
-	[BLK_STS_NOSPC]		= { -ENOSPC,	"critical space allocation" },
-	[BLK_STS_TRANSPORT]	= { -ENOLINK,	"recoverable transport" },
-	[BLK_STS_TARGET]	= { -EREMOTEIO,	"critical target" },
-	[BLK_STS_NEXUS]		= { -EBADE,	"critical nexus" },
-	[BLK_STS_MEDIUM]	= { -ENODATA,	"critical medium" },
-	[BLK_STS_PROTECTION]	= { -EILSEQ,	"protection" },
-	[BLK_STS_RESOURCE]	= { -ENOMEM,	"kernel resource" },
-	[BLK_STS_AGAIN]		= { -EAGAIN,	"nonblocking retry" },
-
-	/* device mapper special case, should not leak out: */
-	[BLK_STS_DM_REQUEUE]	= { -EREMCHG, "dm internal retry" },
-
-	/* everything else not covered above: */
-	[BLK_STS_IOERR]		= { -EIO,	"I/O" },
-};
-
-int blk_status_to_errno(blk_status_t status)
-{
-	int idx = (__force int)status;
-
-	if (WARN_ON_ONCE(idx >= ARRAY_SIZE(blk_errors)))
-		return -EIO;
-	return blk_errors[idx].err;
-}
-
-const char *blk_status_to_str(blk_status_t status)
-{
-	int idx = (__force int)status;
-
-	if (WARN_ON_ONCE(idx >= ARRAY_SIZE(blk_errors)))
-		return "(invalid error)";
-	return blk_errors[idx].name;
-}
-
-void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter,
-			struct bio *src, struct bvec_iter *src_iter)
-{
-	struct bio_vec src_bv, dst_bv;
-	void *src_p, *dst_p;
-	unsigned bytes;
-
-	while (src_iter->bi_size && dst_iter->bi_size) {
-		src_bv = bio_iter_iovec(src, *src_iter);
-		dst_bv = bio_iter_iovec(dst, *dst_iter);
-
-		bytes = min(src_bv.bv_len, dst_bv.bv_len);
-
-		src_p = kmap_atomic(src_bv.bv_page);
-		dst_p = kmap_atomic(dst_bv.bv_page);
-
-		memcpy(dst_p + dst_bv.bv_offset,
-		       src_p + src_bv.bv_offset,
-		       bytes);
-
-		kunmap_atomic(dst_p);
-		kunmap_atomic(src_p);
-
-		flush_dcache_page(dst_bv.bv_page);
-
-		bio_advance_iter(src, src_iter, bytes);
-		bio_advance_iter(dst, dst_iter, bytes);
-	}
-}
-
-/**
- * bio_copy_data - copy contents of data buffers from one bio to another
- * @src: source bio
- * @dst: destination bio
- *
- * Stops when it reaches the end of either @src or @dst - that is, copies
- * min(src->bi_size, dst->bi_size) bytes (or the equivalent for lists of bios).
- */
-void bio_copy_data(struct bio *dst, struct bio *src)
-{
-	struct bvec_iter src_iter = src->bi_iter;
-	struct bvec_iter dst_iter = dst->bi_iter;
-
-	bio_copy_data_iter(dst, &dst_iter, src, &src_iter);
-}
-
-void zero_fill_bio_iter(struct bio *bio, struct bvec_iter start)
-{
-	unsigned long flags;
-	struct bio_vec bv;
-	struct bvec_iter iter;
-
-	__bio_for_each_segment(bv, bio, iter, start) {
-		char *data = bvec_kmap_irq(&bv, &flags);
-		memset(data, 0, bv.bv_len);
-		bvec_kunmap_irq(data, &flags);
-	}
-}
-
-static int __bio_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp)
-{
-	bio_set_flag(bio, BIO_CLONED);
-	bio->bi_ioprio = bio_src->bi_ioprio;
-	bio->bi_iter = bio_src->bi_iter;
-	return 0;
-}
-
-struct bio *bio_alloc_clone(struct block_device *bdev, struct bio *bio_src,
-		gfp_t gfp, struct bio_set *bs)
-{
-	struct bio *bio;
-
-	bio = bio_alloc_bioset(bdev, 0, bio_src->bi_opf, gfp, bs);
-	if (!bio)
-		return NULL;
-
-	if (__bio_clone(bio, bio_src, gfp) < 0) {
-		bio_put(bio);
-		return NULL;
-	}
-	bio->bi_io_vec = bio_src->bi_io_vec;
-
-	return bio;
-}
-
-struct bio *bio_split(struct bio *bio, int sectors,
-		      gfp_t gfp, struct bio_set *bs)
-{
-	struct bio *split = NULL;
-
-	BUG_ON(sectors <= 0);
-	BUG_ON(sectors >= bio_sectors(bio));
-
-	split = bio_alloc_clone(bio->bi_bdev, bio, gfp, bs);
-	if (!split)
-		return NULL;
-
-	split->bi_iter.bi_size = sectors << 9;
-
-	bio_advance(bio, split->bi_iter.bi_size);
-
-	return split;
-}
-
-void bio_free_pages(struct bio *bio)
-{
-	struct bvec_iter_all iter;
-	struct bio_vec *bvec;
-
-	bio_for_each_segment_all(bvec, bio, iter)
-		__free_page(bvec->bv_page);
-}
-
-void bio_advance(struct bio *bio, unsigned bytes)
-{
-	bio_advance_iter(bio, &bio->bi_iter, bytes);
-}
-
-static void bio_free(struct bio *bio)
-{
-	struct bio_set *bs = bio->bi_pool;
-
-	if (bs) {
-		if (bio->bi_max_vecs > BIO_INLINE_VECS)
-			mempool_free(bio->bi_io_vec, &bs->bvec_pool);
-
-		mempool_free((void *) bio - bs->front_pad, &bs->bio_pool);
-	} else {
-		kfree(bio);
-	}
-}
-
-void bio_put(struct bio *bio)
-{
-	if (!bio_flagged(bio, BIO_REFFED))
-		bio_free(bio);
-	else {
-		BUG_ON(!atomic_read(&bio->__bi_cnt));
-
-		/*
-		 * last put frees it
-		 */
-		if (atomic_dec_and_test(&bio->__bi_cnt))
-			bio_free(bio);
-	}
-}
-
-int bio_add_page(struct bio *bio, struct page *page,
-		 unsigned int len, unsigned int off)
-{
-	struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt];
-
-	WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
-	WARN_ON_ONCE(bio->bi_vcnt >= bio->bi_max_vecs);
-
-	bv->bv_page = page;
-	bv->bv_offset = off;
-	bv->bv_len = len;
-
-	bio->bi_iter.bi_size += len;
-	bio->bi_vcnt++;
-	return len;
-}
-
-static inline bool bio_remaining_done(struct bio *bio)
-{
-	/*
-	 * If we're not chaining, then ->__bi_remaining is always 1 and
-	 * we always end io on the first invocation.
-	 */
-	if (!bio_flagged(bio, BIO_CHAIN))
-		return true;
-
-	BUG_ON(atomic_read(&bio->__bi_remaining) <= 0);
-
-	if (atomic_dec_and_test(&bio->__bi_remaining)) {
-		bio_clear_flag(bio, BIO_CHAIN);
-		return true;
-	}
-
-	return false;
-}
-
-static struct bio *__bio_chain_endio(struct bio *bio)
-{
-	struct bio *parent = bio->bi_private;
-
-	if (!parent->bi_status)
-		parent->bi_status = bio->bi_status;
-	bio_put(bio);
-	return parent;
-}
-
-static void bio_chain_endio(struct bio *bio)
-{
-	bio_endio(__bio_chain_endio(bio));
-}
-
-void bio_endio(struct bio *bio)
-{
-again:
-	if (!bio_remaining_done(bio))
-		return;
-
-	/*
-	 * Need to have a real endio function for chained bios, otherwise
-	 * various corner cases will break (like stacking block devices that
-	 * save/restore bi_end_io) - however, we want to avoid unbounded
-	 * recursion and blowing the stack. Tail call optimization would
-	 * handle this, but compiling with frame pointers also disables
-	 * gcc's sibling call optimization.
-	 */
-	if (bio->bi_end_io == bio_chain_endio) {
-		bio = __bio_chain_endio(bio);
-		goto again;
-	}
-
-	if (bio->bi_end_io)
-		bio->bi_end_io(bio);
-}
-
-void bio_reset(struct bio *bio, struct block_device *bdev, unsigned int opf)
-{
-	unsigned long flags = bio->bi_flags & (~0UL << BIO_RESET_BITS);
-
-	memset(bio, 0, BIO_RESET_BYTES);
-	bio->bi_bdev	= bdev;
-	bio->bi_opf	= opf;
-	bio->bi_flags	= flags;
-	atomic_set(&bio->__bi_remaining, 1);
-}
-
-struct bio *bio_kmalloc(unsigned int nr_iovecs, gfp_t gfp_mask)
-{
-	struct bio *bio;
-
-	bio = kmalloc(sizeof(struct bio) +
-		      sizeof(struct bio_vec) * nr_iovecs, gfp_mask);
-	if (unlikely(!bio))
-		return NULL;
-	bio_init(bio, NULL, nr_iovecs ? bio->bi_inline_vecs : NULL, nr_iovecs, 0);
-	bio->bi_pool = NULL;
-	return bio;
-}
-
-static struct bio_vec *bvec_alloc(mempool_t *pool, int *nr_vecs,
-		gfp_t gfp_mask)
-{
-	*nr_vecs = roundup_pow_of_two(*nr_vecs);
-	/*
-	 * Try a slab allocation first for all smaller allocations.  If that
-	 * fails and __GFP_DIRECT_RECLAIM is set retry with the mempool.
-	 * The mempool is sized to handle up to BIO_MAX_VECS entries.
-	 */
-	if (*nr_vecs < BIO_MAX_VECS) {
-		struct bio_vec *bvl;
-
-		bvl = kmalloc(sizeof(*bvl) * *nr_vecs, gfp_mask);
-		if (likely(bvl))
-			return bvl;
-		*nr_vecs = BIO_MAX_VECS;
-	}
-
-	return mempool_alloc(pool, gfp_mask);
-}
-
-struct bio *bio_alloc_bioset(struct block_device *bdev,
-			     unsigned nr_iovecs,
-			     unsigned opf,
-			     gfp_t gfp_mask,
-			     struct bio_set *bs)
-{
-	struct bio *bio;
-	void *p;
-
-	if (nr_iovecs > BIO_MAX_VECS)
-		return NULL;
-
-	p = mempool_alloc(&bs->bio_pool, gfp_mask);
-	if (unlikely(!p))
-		return NULL;
-
-	bio = p + bs->front_pad;
-	if (nr_iovecs > BIO_INLINE_VECS) {
-		struct bio_vec *bvl = NULL;
-
-		bvl = bvec_alloc(&bs->bvec_pool, &nr_iovecs, gfp_mask);
-		if (unlikely(!bvl))
-			goto err_free;
-
-		bio_init(bio, bdev, bvl, nr_iovecs, opf);
-	} else if (nr_iovecs) {
-		bio_init(bio, bdev, bio->bi_inline_vecs, BIO_INLINE_VECS, opf);
-	} else {
-		bio_init(bio, bdev, NULL, 0, opf);
-	}
-
-	bio->bi_pool = bs;
-	return bio;
-
-err_free:
-	mempool_free(p, &bs->bio_pool);
-	return NULL;
-}
-
-void bioset_exit(struct bio_set *bs)
-{
-	mempool_exit(&bs->bio_pool);
-	mempool_exit(&bs->bvec_pool);
-}
-
-int bioset_init(struct bio_set *bs,
-		unsigned int pool_size,
-		unsigned int front_pad,
-		int flags)
-{
-	int ret;
-
-	bs->front_pad = front_pad;
-	if (flags & BIOSET_NEED_BVECS)
-		bs->back_pad = BIO_INLINE_VECS * sizeof(struct bio_vec);
-	else
-		bs->back_pad = 0;
-
-	ret   = mempool_init_kmalloc_pool(&bs->bio_pool, pool_size, bs->front_pad +
-					  sizeof(struct bio) + bs->back_pad) ?:
-		mempool_init_kmalloc_pool(&bs->bvec_pool, pool_size,
-					  sizeof(struct bio_vec) * BIO_MAX_VECS);
-	if (ret)
-		bioset_exit(bs);
-	return ret;
-}