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Commit 09b63599 authored by Murali Nalajala's avatar Murali Nalajala
Browse files

vservices: block: Port virtual block drivers to 4.14 



Virtual block drivers are broken for4.14 due to block
level framework primitives change. Port the virtual
block drivers to build and compile for 4.14.

Change-Id: I50808765b4b1bf817db06d523d17fb2a87e80ddc
Signed-off-by: default avatarMurali Nalajala <mnalajal@codeaurora.org>
Signed-off-by: default avatarPrakruthi Deepak Heragu <pheragu@codeaurora.org>
parent 4bfd2011

drivers/block/vs_block_client.c

+12 −91
Original line number Diff line number Diff line
@@ -39,21 +39,11 @@ 
#include <vservices/session.h>

#include <vservices/wait.h>



/*

 * BLK_DEF_MAX_SECTORS was replaced with the hard-coded number 1024 in 3.19,

 * and restored in 4.3

 */

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)) && \

        (LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0))

#define BLK_DEF_MAX_SECTORS 1024

#endif



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)

#define bio_sector(bio) (bio)->bi_iter.bi_sector

#define bio_size(bio) (bio)->bi_iter.bi_size

#else

#define bio_sector(bio) (bio)->bi_sector

#define bio_size(bio) (bio)->bi_size



#if !defined(bio_flags)

#define bio_flags(bio) bio->bi_opf

#endif



#define CLIENT_BLKDEV_NAME		"vblock"
@@ -171,27 +161,15 @@ static void vs_block_device_put(struct vs_block_device *blkdev) 
	kref_put(&blkdev->kref, vs_block_device_kfree);

}



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)

static void

#else

static int

#endif

vs_block_client_blkdev_release(struct gendisk *disk, fmode_t mode)

{

	struct vs_block_device *blkdev = disk->private_data;



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)

	if (WARN_ON(!blkdev))

		return;

#else

	if (WARN_ON(!blkdev))

		return -ENXIO;

#endif



	vs_block_device_put(blkdev);

#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)

	return 0;

#endif

}



static int vs_block_client_blkdev_open(struct block_device *bdev, fmode_t mode)
@@ -288,12 +266,8 @@ static int block_client_send_write_req(struct block_client *client, 
	struct bio_vec *bvec;

	int err;

	bool flush, nodelay, commit;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)

	struct bvec_iter iter;

	struct bio_vec bvec_local;

#else

	int i;

#endif



	err = vs_block_client_check_sector_size(client, bio);

	if (err < 0)
@@ -323,12 +297,8 @@ static int block_client_send_write_req(struct block_client *client, 


	vs_pbuf_resize(&pbuf, 0);



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)

	bvec = &bvec_local;

	bio_for_each_segment(bvec_local, bio, iter)

#else

	bio_for_each_segment(bvec, bio, i)

#endif

	{

		unsigned long flags;

		void *buf = bvec_kmap_irq(bvec, &flags);
@@ -350,15 +320,10 @@ static int block_client_send_write_req(struct block_client *client, 
		err = -EIO;

		goto fail_free_write;

	}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)



	flush = (bio_flags(bio) & REQ_PREFLUSH);

	commit = (bio_flags(bio) & REQ_FUA);

	nodelay = (bio_flags(bio) & REQ_SYNC);

#else

	flush = (bio->bi_rw & REQ_FLUSH);

	commit = (bio->bi_rw & REQ_FUA);

	nodelay = (bio->bi_rw & REQ_SYNC);

#endif

	err = vs_client_block_io_req_write(state, bio, bio_sector(bio),

			bio_sectors(bio), nodelay, flush, commit, pbuf, mbuf);
@@ -386,13 +351,8 @@ static int block_client_send_read_req(struct block_client *client, 
	err = vs_block_client_check_sector_size(client, bio);

	if (err < 0)

		return err;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)

	flush = (bio_flags(bio) & REQ_PREFLUSH);

	nodelay = (bio_flags(bio) & REQ_SYNC);

#else

	flush = (bio->bi_rw & REQ_FLUSH);

	nodelay = (bio->bi_rw & REQ_SYNC);

#endif

	do {

		/* Wait until it's possible to send a read request */

		err = vs_wait_state_nointr(state,
@@ -413,15 +373,10 @@ static int block_client_send_read_req(struct block_client *client, 
	return err;

}



#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)

static blk_qc_t

#else

static void

#endif

vs_block_client_make_request(struct request_queue *q, struct bio *bio)

{

	struct block_device *bdev = bio->bi_bdev;

	struct vs_block_device *blkdev = bdev->bd_disk->private_data;

	struct vs_block_device *blkdev = bio->bi_disk->private_data;

	struct block_client *client;

	int err = 0;
@@ -431,9 +386,7 @@ vs_block_client_make_request(struct request_queue *q, struct bio *bio) 
		goto fail_get_client;

	}



#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	blk_queue_split(q, &bio, q->bio_split);

#endif

	blk_queue_split(q, &bio);



	if (!vs_state_lock_safe(&client->client)) {

		err = -ENODEV;
@@ -459,18 +412,13 @@ vs_block_client_make_request(struct request_queue *q, struct bio *bio) 
fail_lock_client:

	vs_block_client_put(client);

fail_get_client:

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)



	if (err < 0) {

		bio->bi_error = err;

		bio->bi_status = err;

		bio_endio(bio);

	}

#else

	if (err < 0)

		bio_endio(bio, err);

#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)



	return BLK_QC_T_NONE;

#endif

}



static int vs_block_client_get_blkdev_id(struct block_client *client)
@@ -567,9 +515,6 @@ static int vs_block_client_disk_add(struct block_client *client) 
	blkdev->disk->major = block_client_major;

	blkdev->disk->first_minor = blkdev->id * PERDEV_MINORS;

	blkdev->disk->fops         = &block_client_ops;

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)

	blkdev->disk->driverfs_dev = &client->service->dev;

#endif

	blkdev->disk->private_data = blkdev;

	blkdev->disk->queue        = blkdev->queue;

	blkdev->disk->flags       |= GENHD_FL_EXT_DEVT;
@@ -605,11 +550,7 @@ static int vs_block_client_disk_add(struct block_client *client) 
	client->blkdev = blkdev;

	vs_service_state_unlock(client->service);



#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,7,0)

	device_add_disk(&client->service->dev, blkdev->disk);

#else

	add_disk(blkdev->disk);

#endif

	dev_dbg(&client->service->dev, "added block disk '%s'\n",

			blkdev->disk->disk_name);
@@ -781,19 +722,11 @@ static int vs_block_client_ack_read(struct vs_client_block_state *state, 
	struct bio_vec *bvec;

	int err = 0;

	size_t bytes_read = 0;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)

	struct bio_vec bvec_local;

	struct bvec_iter iter;

#else

	int i;

#endif



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)

	bvec = &bvec_local;

	bio_for_each_segment(bvec_local, bio, iter)

#else

	bio_for_each_segment(bvec, bio, i)

#endif

	{

		unsigned long flags;

		void *buf;
@@ -814,13 +747,8 @@ static int vs_block_client_ack_read(struct vs_client_block_state *state, 


	vs_client_block_io_free_ack_read(state, &pbuf, mbuf);



#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	if (err < 0)

		bio->bi_error = err;

	bio->bi_status = err;

	bio_endio(bio);

#else

	bio_endio(bio, err);

#endif



	return 0;

}
@@ -877,11 +805,8 @@ static int vs_block_client_ack_write(struct vs_client_block_state *state, 
	if (WARN_ON(!bio))

		return -EPROTO;



#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	bio->bi_status = 0;

	bio_endio(bio);

#else

	bio_endio(bio, 0);

#endif



	wake_up(&state->service->quota_wq);
@@ -896,12 +821,8 @@ static int vs_block_client_nack_io(struct vs_client_block_state *state, 
	if (WARN_ON(!bio))

		return -EPROTO;



#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	bio->bi_error = block_client_vs_to_linux_error(err);

	bio->bi_status = block_client_vs_to_linux_error(err);

	bio_endio(bio);

#else

	bio_endio(bio, block_client_vs_to_linux_error(err));

#endif



	wake_up(&state->service->quota_wq);

drivers/block/vs_block_server.c

+7 −71
Original line number Diff line number Diff line
@@ -120,11 +120,7 @@ static inline u32 vs_req_num_sectors(struct block_server *server, 


static inline u64 vs_req_sector_index(struct block_server_request *req)

{

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)

	return req->bio.bi_iter.bi_sector;

#else

	return req->bio.bi_sector;

#endif

}



static void vs_block_server_closed(struct vs_server_block_state *state)
@@ -425,11 +421,7 @@ static int vs_block_server_complete_req(struct block_server *server, 
{

	int err;



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)

	req->bio.bi_iter.bi_idx = 0;

#else

	req->bio.bi_idx = 0;

#endif

	if (!vs_state_lock_safe(&server->server))

		return -ENOLINK;
@@ -544,16 +536,10 @@ static int vs_block_bio_map_pbuf(struct bio *bio, struct vs_pbuf *pbuf) 
}



/* Read request handling */

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)

static void vs_block_server_read_done(struct bio *bio, int err)

#else

static void vs_block_server_read_done(struct bio *bio)

#endif

{

	unsigned long flags;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	int err = bio->bi_error;

#endif

	int err = blk_status_to_errno(bio->bi_status);

	struct block_server_request *req = container_of(bio,

			struct block_server_request, bio);

	struct block_server *server = req->server;
@@ -599,11 +585,7 @@ static int vs_block_submit_read(struct block_server *server, 
			err = vs_block_bio_map_pbuf(bio, &req->pbuf);

	} else {

		/* We need a bounce buffer. First set up the bvecs. */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)

		bio->bi_iter.bi_size = size;

#else

		bio->bi_size = size;

#endif



		while (size > 0) {

			struct bio_vec *bvec = &bio->bi_io_vec[bio->bi_vcnt];
@@ -626,12 +608,8 @@ static int vs_block_submit_read(struct block_server *server, 
	}



	if (err) {

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

		bio->bi_error = err;

		bio->bi_status = err;

		bio_endio(bio);

#else

		bio_endio(bio, err);

#endif

	} else {

		dev_vdbg(&server->service->dev,

				"submit read req sector %#llx count %#x\n",
@@ -678,27 +656,15 @@ static int vs_block_server_io_req_read(struct vs_server_block_state *state, 
	req->submitted = false;



	if (flush) {

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)

		op_flags |= REQ_PREFLUSH;

#else

		op_flags |= REQ_FLUSH;

#endif

	}

	if (nodelay) {

		op_flags |= REQ_SYNC;

	}



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)

	bio->bi_iter.bi_sector = (sector_t)sector_index;

#else

	bio->bi_sector = (sector_t)sector_index;

#endif

	bio->bi_bdev = server->bdev;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)

	bio_set_dev(bio, server->bdev);

	bio_set_op_attrs(bio, REQ_OP_READ, op_flags);

#else

	bio->bi_rw = READ | op_flags;

#endif

	bio->bi_end_io = vs_block_server_read_done;



	req->mbuf = vs_server_block_io_alloc_ack_read(state, &req->pbuf,
@@ -707,12 +673,8 @@ static int vs_block_server_io_req_read(struct vs_server_block_state *state, 
		/* Fall back to a bounce buffer */

		req->mbuf = NULL;

	} else if (IS_ERR(req->mbuf)) {

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

		bio->bi_error = PTR_ERR(req->mbuf);

		bio->bi_status = PTR_ERR(req->mbuf);

		bio_endio(bio);

#else

		bio_endio(bio, PTR_ERR(req->mbuf));

#endif

		return 0;

	}
@@ -783,16 +745,10 @@ static void vs_block_server_write_bounce_work(struct work_struct *work) 
	spin_unlock(&server->bounce_req_lock);

}



#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)

static void vs_block_server_write_done(struct bio *bio, int err)

#else

static void vs_block_server_write_done(struct bio *bio)

#endif

{

	unsigned long flags;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	int err = bio->bi_error;

#endif

	int err = blk_status_to_errno(bio->bi_status);

	struct block_server_request *req = container_of(bio,

			struct block_server_request, bio);

	struct block_server *server = req->server;
@@ -850,11 +806,7 @@ static int vs_block_server_io_req_write(struct vs_server_block_state *state, 
	req->submitted = false;



	if (flush) {

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,8,0)

		op_flags |= REQ_PREFLUSH;

#else

		op_flags |= REQ_FLUSH;

#endif

	}

	if (commit) {

		op_flags |= REQ_FUA;
@@ -863,17 +815,9 @@ static int vs_block_server_io_req_write(struct vs_server_block_state *state, 
		op_flags |= REQ_SYNC;

	}



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)

	bio->bi_iter.bi_sector = (sector_t)sector_index;

#else

	bio->bi_sector = (sector_t)sector_index;

#endif

	bio->bi_bdev = server->bdev;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)

	bio_set_dev(bio, server->bdev);

	bio_set_op_attrs(bio, REQ_OP_WRITE, op_flags);

#else

	bio->bi_rw = WRITE | op_flags;

#endif

	bio->bi_end_io = vs_block_server_write_done;



	if (pbuf.size < req->size) {
@@ -892,11 +836,7 @@ static int vs_block_server_io_req_write(struct vs_server_block_state *state, 
		/* We need a bounce buffer. First set up the bvecs. */

		int size = pbuf.size;



#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)

		bio->bi_iter.bi_size = size;

#else

		bio->bi_size = size;

#endif



		while (size > 0) {

			struct bio_vec *bvec = &bio->bi_io_vec[bio->bi_vcnt];
@@ -939,12 +879,8 @@ static int vs_block_server_io_req_write(struct vs_server_block_state *state, 
	return 0;



fail_bio:

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)

	bio->bi_error = err;

	bio->bi_status = err;

	bio_endio(bio);

#else

	bio_endio(bio, err);

#endif

	return 0;

}