scst: Port to Linux kernel v4.8

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6991 d57e44dd-8a1f-0410-8b47-8ef2f437770f

scst/src/dev_handlers/scst_vdisk.c

@@ -6519,8 +6519,10 @@ static void blockio_endio(struct bio *bio)
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
 		if (bio->bi_rw & (1 << BIO_RW))
-#else
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 		if (bio->bi_rw & REQ_WRITE)
+#else
+		if (bio_op(bio) == REQ_OP_WRITE)
 #endif
 			scst_set_cmd_error(blockio_work->cmd,
 				SCST_LOAD_SENSE(scst_sense_write_error));
@@ -6551,16 +6553,22 @@ static void vdisk_bio_set_failfast(struct bio *bio)
 	bio->bi_rw |= (1 << BIO_RW_FAILFAST_DEV) |
 		      (1 << BIO_RW_FAILFAST_TRANSPORT) |
 		      (1 << BIO_RW_FAILFAST_DRIVER);
-#else
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 	bio->bi_rw |= REQ_FAILFAST_DEV |
 		      REQ_FAILFAST_TRANSPORT |
 		      REQ_FAILFAST_DRIVER;
+#else
+	bio->bi_opf |= REQ_FAILFAST_DEV |
+		       REQ_FAILFAST_TRANSPORT |
+		       REQ_FAILFAST_DRIVER;
 #endif
 }
 
 static void vdisk_bio_set_hoq(struct bio *bio)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) ||			\
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+	bio->bi_opf |= REQ_SYNC;
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) ||			\
 	(defined(RHEL_MAJOR) &&						\
 	 (RHEL_MAJOR -0 > 6 || RHEL_MAJOR -0 == 6 && RHEL_MINOR -0 > 0))
 	bio->bi_rw |= REQ_SYNC;
@@ -6569,7 +6577,9 @@ static void vdisk_bio_set_hoq(struct bio *bio)
 #else
 	bio->bi_rw |= 1 << BIO_RW_SYNC;
 #endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) ||			\
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+	bio->bi_opf |= REQ_META;
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) ||			\
 	(defined(RHEL_MAJOR) &&						\
 	 (RHEL_MAJOR -0 > 6 || RHEL_MAJOR -0 == 6 && RHEL_MINOR -0 > 0))
 	bio->bi_rw |= REQ_META;
@@ -6819,6 +6829,14 @@ static void blockio_exec_rw(struct vdisk_cmd_params *p, bool write, bool fua)
 				bio->bi_private = blockio_work;
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)) && (LINUX_VERSION_CODE <= KERNEL_VERSION(3, 6, 0))
 				bio->bi_destructor = blockio_bio_destructor;
+#endif
+				if (write)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+					bio->bi_rw |= (1 << BIO_RW);
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
+					bio->bi_rw |= REQ_WRITE;
+#else
+					bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 #endif
 				/*
 				 * Better to fail fast w/o any local recovery
@@ -6830,7 +6848,11 @@ static void blockio_exec_rw(struct vdisk_cmd_params *p, bool write, bool fua)
 				bio->bi_rw |= REQ_SYNC;
 #endif
 				if (fua)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 					bio->bi_rw |= REQ_FUA;
+#else
+					bio->bi_opf |= REQ_FUA;
+#endif
 
 				if (cmd->queue_type == SCST_CMD_QUEUE_HEAD_OF_QUEUE)
 					vdisk_bio_set_hoq(bio);
@@ -6883,7 +6905,11 @@ static void blockio_exec_rw(struct vdisk_cmd_params *p, bool write, bool fua)
 		hbio = hbio->bi_next;
 		bio->bi_next = NULL;
 
-		submit_bio((write != 0), bio);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
+		submit_bio(bio->bi_rw, bio);
+#else
+		submit_bio(bio);
+#endif
 	}
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39)
@@ -6974,7 +7000,12 @@ static int vdisk_blockio_flush(struct block_device *bdev, gfp_t gfp_mask,
 		bio->bi_end_io = vdev_flush_end_io;
 		bio->bi_private = cmd;
 		bio->bi_bdev = bdev;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 		submit_bio(WRITE_FLUSH, bio);
+#else
+		bio_set_op_attrs(bio, REQ_OP_FLUSH, 0);
+		submit_bio(bio);
+#endif
 		goto out;
 	} else {
 #else
@@ -7114,7 +7145,11 @@ static ssize_t blockio_read_sync(struct scst_vdisk_dev *virt_dev, void *buf,
 	if (!bio)
 		goto out;
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 	bio->bi_rw = READ_SYNC;
+#else
+	bio_set_op_attrs(bio, REQ_OP_READ, REQ_SYNC);
+#endif
 	bio->bi_bdev = bdev;
 	bio->bi_end_io = blockio_end_sync_io;
 	bio->bi_private = &s;
@@ -7141,7 +7176,11 @@ static ssize_t blockio_read_sync(struct scst_vdisk_dev *virt_dev, void *buf,
 			}
 		}
 	}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 	submit_bio(bio->bi_rw, bio);
+#else
+	submit_bio(bio);
+#endif
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)) && (LINUX_VERSION_CODE <= KERNEL_VERSION(3, 6, 0))
 	submitted = true;
 #endif

scst/src/scst_lib.c

@@ -7803,6 +7803,34 @@ static void bio_kmalloc_destructor(struct bio *bio)
 }
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+static struct request *blk_make_request(struct request_queue *q,
+					struct bio *bio,
+					gfp_t gfp_mask)
+{
+	struct request *rq = blk_get_request(q, bio_data_dir(bio), gfp_mask);
+
+	if (IS_ERR(rq))
+		return rq;
+
+	blk_rq_set_block_pc(rq);
+
+	for_each_bio(bio) {
+		struct bio *bounce_bio = bio;
+		int ret;
+
+		blk_queue_bounce(q, &bounce_bio);
+		ret = blk_rq_append_bio(rq, bounce_bio);
+		if (unlikely(ret)) {
+			blk_put_request(rq);
+			return ERR_PTR(ret);
+		}
+	}
+
+	return rq;
+}
+#endif
+
 /* __blk_map_kern_sg - map kernel data to a request for REQ_TYPE_BLOCK_PC */
 static struct request *__blk_map_kern_sg(struct request_queue *q,
 	struct scatterlist *sgl, int nents, struct blk_kern_sg_work *bw,
@@ -7885,8 +7913,10 @@ static struct request *__blk_map_kern_sg(struct request_queue *q,
 				if (!reading)
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
 					bio->bi_rw |= 1 << BIO_RW;
-#else
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
 					bio->bi_rw |= REQ_WRITE;
+#else
+					bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 #endif
 				bios++;
 				bio->bi_private = bw;