Move c_src dirs back to toplevel

We just wanted c sourcefiles out of the top level, not c source
directories.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 428 deletions

diff --git a/c_src/linux/blkdev.c b/c_src/linux/blkdev.c
deleted file mode 100644
index 61f23362..00000000
--- a/c_src/linux/blkdev.c
+++ /dev/null
@@ -1,428 +0,0 @@
-
-#include <alloca.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <unistd.h>
-
-#include <libaio.h>
-
-#ifdef CONFIG_VALGRIND
-#include <valgrind/memcheck.h>
-#endif
-
-#include <linux/bio.h>
-#include <linux/blkdev.h>
-#include <linux/completion.h>
-#include <linux/fs.h>
-#include <linux/kthread.h>
-
-#include "tools-util.h"
-
-struct fops {
-	void (*init)(void);
-	void (*cleanup)(void);
-	void (*read)(struct bio *bio, struct iovec * iov, unsigned i);
-	void (*write)(struct bio *bio, struct iovec * iov, unsigned i);
-};
-
-static struct fops *fops;
-static io_context_t aio_ctx;
-static atomic_t running_requests;
-
-void generic_make_request(struct bio *bio)
-{
-	struct iovec *iov;
-	struct bvec_iter iter;
-	struct bio_vec bv;
-	ssize_t ret;
-	unsigned i;
-
-	if (bio->bi_opf & REQ_PREFLUSH) {
-		ret = fdatasync(bio->bi_bdev->bd_fd);
-		if (ret) {
-			fprintf(stderr, "fsync error: %m\n");
-			bio->bi_status = BLK_STS_IOERR;
-			bio_endio(bio);
-			return;
-		}
-	}
-
-	i = 0;
-	bio_for_each_segment(bv, bio, iter)
-		i++;
-
-	iov = alloca(sizeof(*iov) * i);
-
-	i = 0;
-	bio_for_each_segment(bv, bio, iter) {
-		void *start = page_address(bv.bv_page) + bv.bv_offset;
-		size_t len = bv.bv_len;
-
-		iov[i++] = (struct iovec) {
-			.iov_base = start,
-			.iov_len = len,
-		};
-
-#ifdef CONFIG_VALGRIND
-		/* To be pedantic it should only be on IO completion. */
-		if (bio_op(bio) == REQ_OP_READ)
-			VALGRIND_MAKE_MEM_DEFINED(start, len);
-#endif
-	}
-
-	switch (bio_op(bio)) {
-	case REQ_OP_READ:
-		fops->read(bio, iov, i);
-		break;
-	case REQ_OP_WRITE:
-		fops->write(bio, iov, i);
-		break;
-	case REQ_OP_FLUSH:
-		ret = fsync(bio->bi_bdev->bd_fd);
-		if (ret)
-			die("fsync error: %m");
-		bio_endio(bio);
-		break;
-	default:
-		BUG();
-	}
-}
-
-static void submit_bio_wait_endio(struct bio *bio)
-{
-	complete(bio->bi_private);
-}
-
-int submit_bio_wait(struct bio *bio)
-{
-	struct completion done;
-
-	init_completion(&done);
-	bio->bi_private = &done;
-	bio->bi_end_io = submit_bio_wait_endio;
-	bio->bi_opf |= REQ_SYNC;
-	submit_bio(bio);
-	wait_for_completion(&done);
-
-	return blk_status_to_errno(bio->bi_status);
-}
-
-int blkdev_issue_discard(struct block_device *bdev,
-			 sector_t sector, sector_t nr_sects,
-			 gfp_t gfp_mask)
-{
-	return 0;
-}
-
-int blkdev_issue_zeroout(struct block_device *bdev,
-			 sector_t sector, sector_t nr_sects,
-			 gfp_t gfp_mask, unsigned flags)
-{
-	/* Not yet implemented: */
-	BUG();
-}
-
-unsigned bdev_logical_block_size(struct block_device *bdev)
-{
-	struct stat statbuf;
-	unsigned blksize;
-	int ret;
-
-	ret = fstat(bdev->bd_fd, &statbuf);
-	BUG_ON(ret);
-
-	if (!S_ISBLK(statbuf.st_mode))
-		return statbuf.st_blksize;
-
-	xioctl(bdev->bd_fd, BLKPBSZGET, &blksize);
-	return blksize;
-}
-
-sector_t get_capacity(struct gendisk *disk)
-{
-	struct block_device *bdev =
-		container_of(disk, struct block_device, __bd_disk);
-	struct stat statbuf;
-	u64 bytes;
-	int ret;
-
-	ret = fstat(bdev->bd_fd, &statbuf);
-	BUG_ON(ret);
-
-	if (!S_ISBLK(statbuf.st_mode))
-		return statbuf.st_size >> 9;
-
-	ret = ioctl(bdev->bd_fd, BLKGETSIZE64, &bytes);
-	BUG_ON(ret);
-
-	return bytes >> 9;
-}
-
-void blkdev_put(struct block_device *bdev, void *holder)
-{
-	fdatasync(bdev->bd_fd);
-	close(bdev->bd_fd);
-	free(bdev);
-}
-
-struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
-					void *holder, const struct blk_holder_ops *hop)
-{
-	struct block_device *bdev;
-	int fd, flags = 0;
-
-	if ((mode & (BLK_OPEN_READ|BLK_OPEN_WRITE)) == (BLK_OPEN_READ|BLK_OPEN_WRITE))
-		flags = O_RDWR;
-	else if (mode & BLK_OPEN_READ)
-		flags = O_RDONLY;
-	else if (mode & BLK_OPEN_WRITE)
-		flags = O_WRONLY;
-
-	if (!(mode & BLK_OPEN_BUFFERED))
-		flags |= O_DIRECT;
-
-	if (mode & BLK_OPEN_EXCL)
-		flags |= O_EXCL;
-
-	fd = open(path, flags);
-	if (fd < 0)
-		return ERR_PTR(-errno);
-
-	bdev = malloc(sizeof(*bdev));
-	memset(bdev, 0, sizeof(*bdev));
-
-	strncpy(bdev->name, path, sizeof(bdev->name));
-	bdev->name[sizeof(bdev->name) - 1] = '\0';
-
-	bdev->bd_dev		= xfstat(fd).st_rdev;
-	bdev->bd_fd		= fd;
-	bdev->bd_holder		= holder;
-	bdev->bd_disk		= &bdev->__bd_disk;
-	bdev->bd_disk->bdi	= &bdev->bd_disk->__bdi;
-	bdev->queue.backing_dev_info = bdev->bd_disk->bdi;
-
-	return bdev;
-}
-
-void bdput(struct block_device *bdev)
-{
-	BUG();
-}
-
-int lookup_bdev(const char *path, dev_t *dev)
-{
-	return -EINVAL;
-}
-
-static void io_fallback(void)
-{
-	fops++;
-	if (fops->init == NULL)
-		die("no fallback possible, something is very wrong");
-	fops->init();
-}
-
-static void sync_check(struct bio *bio, int ret)
-{
-	if (ret != bio->bi_iter.bi_size) {
-		die("IO error: %s\n", strerror(-ret));
-	}
-
-	if (bio->bi_opf & REQ_FUA) {
-		ret = fdatasync(bio->bi_bdev->bd_fd);
-		if (ret)
-			die("fsync error: %s\n", strerror(-ret));
-	}
-	bio_endio(bio);
-}
-
-static void sync_init(void) {}
-
-static void sync_cleanup(void)
-{
-	/* not necessary? */
-	sync();
-}
-
-static void sync_read(struct bio *bio, struct iovec * iov, unsigned i)
-{
-
-	ssize_t ret = preadv(bio->bi_bdev->bd_fd, iov, i,
-			     bio->bi_iter.bi_sector << 9);
-	sync_check(bio, ret);
-}
-
-static void sync_write(struct bio *bio, struct iovec * iov, unsigned i)
-{
-	ssize_t ret = pwritev2(bio->bi_bdev->bd_fd, iov, i,
-			       bio->bi_iter.bi_sector << 9,
-			       bio->bi_opf & REQ_FUA ? RWF_SYNC : 0);
-	sync_check(bio, ret);
-}
-
-static DECLARE_WAIT_QUEUE_HEAD(aio_events_completed);
-
-static int aio_completion_thread(void *arg)
-{
-	struct io_event events[8], *ev;
-	int ret;
-	bool stop = false;
-
-	while (!stop) {
-		ret = io_getevents(aio_ctx, 1, ARRAY_SIZE(events),
-				   events, NULL);
-
-		if (ret < 0 && ret == -EINTR)
-			continue;
-		if (ret < 0)
-			die("io_getevents() error: %s", strerror(-ret));
-		if (ret)
-			wake_up(&aio_events_completed);
-
-		for (ev = events; ev < events + ret; ev++) {
-			struct bio *bio = (struct bio *) ev->data;
-
-			/* This should only happen during blkdev_cleanup() */
-			if (!bio) {
-				BUG_ON(atomic_read(&running_requests) != 0);
-				stop = true;
-				continue;
-			}
-
-			if (ev->res != bio->bi_iter.bi_size)
-				bio->bi_status = BLK_STS_IOERR;
-
-			bio_endio(bio);
-			atomic_dec(&running_requests);
-		}
-	}
-
-	return 0;
-}
-
-static struct task_struct *aio_task = NULL;
-
-static void aio_init(void)
-{
-	struct task_struct *p;
-	long err = io_setup(256, &aio_ctx);
-	if (!err) {
-		p = kthread_run(aio_completion_thread, NULL, "aio_completion");
-		BUG_ON(IS_ERR(p));
-
-		aio_task = p;
-
-	} else if (err == -ENOSYS) {
-		io_fallback();
-	} else {
-		die("io_setup() error: %s", strerror(err));
-	}
-}
-
-static void aio_cleanup(void)
-{
-	struct task_struct *p = NULL;
-	swap(aio_task, p);
-	get_task_struct(p);
-
-	/* I mean, really?! IO_CMD_NOOP is even defined, but not implemented. */
-	int fds[2];
-	int ret = pipe(fds);
-	if (ret != 0)
-		die("pipe err: %s", strerror(ret));
-
-	/* Wake up the completion thread with spurious work. */
-	int junk = 0;
-	struct iocb iocb = {
-		.aio_lio_opcode = IO_CMD_PWRITE,
-		.data = NULL, /* Signal to stop */
-		.aio_fildes = fds[1],
-		.u.c.buf = &junk,
-		.u.c.nbytes = 1,
-	}, *iocbp = &iocb;
-	ret = io_submit(aio_ctx, 1, &iocbp);
-	if (ret != 1)
-		die("io_submit cleanup err: %s", strerror(-ret));
-
-	ret = kthread_stop(p);
-	BUG_ON(ret);
-
-	put_task_struct(p);
-
-	close(fds[0]);
-	close(fds[1]);
-}
-
-static void aio_op(struct bio *bio, struct iovec *iov, unsigned i, int opcode)
-{
-	ssize_t ret;
-	struct iocb iocb = {
-		.data		= bio,
-		.aio_fildes	= bio->bi_bdev->bd_fd,
-		.aio_rw_flags	= bio->bi_opf & REQ_FUA ? RWF_SYNC : 0,
-		.aio_lio_opcode	= opcode,
-		.u.c.buf        = iov,
-		.u.c.nbytes     = i,
-		.u.c.offset     = bio->bi_iter.bi_sector << 9,
-
-	}, *iocbp = &iocb;
-
-	atomic_inc(&running_requests);
-
-	wait_event(aio_events_completed,
-		   (ret = io_submit(aio_ctx, 1, &iocbp)) != -EAGAIN);;
-
-	if (ret != 1)
-		die("io_submit err: %s", strerror(-ret));
-}
-
-static void aio_read(struct bio *bio, struct iovec *iov, unsigned i)
-{
-	aio_op(bio, iov, i, IO_CMD_PREADV);
-}
-
-static void aio_write(struct bio *bio, struct iovec * iov, unsigned i)
-{
-	aio_op(bio, iov, i, IO_CMD_PWRITEV);
-}
-
-
-/* not implemented */
-static void uring_init(void) {
-	io_fallback();
-}
-
-struct fops fops_list[] = {
-	{
-		.init		= uring_init,
-	}, {
-		.init		= aio_init,
-		.cleanup	= aio_cleanup,
-		.read		= aio_read,
-		.write		= aio_write,
-	}, {
-		.init		= sync_init,
-		.cleanup	= sync_cleanup,
-		.read		= sync_read,
-		.write		= sync_write,
-	}, {
-		/* NULL */
-	}
-};
-
-__attribute__((constructor(102)))
-static void blkdev_init(void)
-{
-	fops = fops_list;
-	fops->init();
-}
-
-__attribute__((destructor(102)))
-static void blkdev_cleanup(void)
-{
-	fops->cleanup();
-}