From 9674df3543fd2ca8dc722f51100c5732e3dbdd7b Mon Sep 17 00:00:00 2001
From: Sebastian Schmelzer
Date: Wed, 9 Apr 2008 01:56:28 +0000
Subject:  * added fixes for kernel api changes (kernel >= 2.6.24)   
 (rq_for_each_bio + bio_for_each_segment => rq_for_each_segment)  * added
 kernel version check to exclude devfs_* includes/commands    (devfs_* was
 dropped with 2.6.18)

git-svn-id: http://svn.openslx.org/svn/openslx/contrib/dnbd/trunk@1733 95ad53e4-c205-0410-b2fa-d234c58c8868
---
 kernel/cache.c | 15 +++++++++++++--
 kernel/main.c  | 27 +++++++++++++++++++++++----
 2 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/kernel/cache.c b/kernel/cache.c
index e72b2ff..b47e32b 100644
--- a/kernel/cache.c
+++ b/kernel/cache.c
@@ -10,6 +10,7 @@
 #include <linux/file.h>
 /* use red-black library of kernel */
 #include <linux/rbtree.h>
+#include <linux/version.h>
 #include <asm/uaccess.h>
 
 #include "../common/dnbd-cliserv.h"
@@ -42,8 +43,12 @@ int dnbd_cache_search(dnbd_cache_t * cache, struct request *req)
 	size_t blksize;
 	void *kaddr;
 
-	int i;
-	struct bio *bio;
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
+		int i;
+		struct bio *bio;
+	#else
+		struct req_iterator iter;
+	#endif
 	struct bio_vec *bvec;
 
 	int result = 0, rbytes;
@@ -75,8 +80,12 @@ int dnbd_cache_search(dnbd_cache_t * cache, struct request *req)
       found:
 	cache->hits++;
 	offset = cn->rb_data * blksize;
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
 	rq_for_each_bio(bio, req) {
 		bio_for_each_segment(bvec, bio, i) {
+	#else
+	rq_for_each_segment(bvec, req, iter) {
+	#endif
 			if (bvec->bv_len > blksize) {
 				printk(KERN_WARNING
 				       "bvec->bv_len greater than cache block size\n");
@@ -103,7 +112,9 @@ int dnbd_cache_search(dnbd_cache_t * cache, struct request *req)
 			result += rbytes;
 			if (result == blksize)
 				goto out;
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
 		}
+	#endif
 	}
 
       out:
diff --git a/kernel/main.c b/kernel/main.c
index 22a6032..f0eea1c 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -15,6 +15,7 @@
   *
   */
 
+#include <linux/version.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
 #include <linux/blkdev.h>
@@ -25,7 +26,9 @@
 #include <linux/bio.h>
 
 #include <linux/errno.h>	/* error codes */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
 #include <linux/devfs_fs_kernel.h>
+#endif
 #include <asm/uaccess.h>
 #include <linux/file.h>
 
@@ -213,7 +216,6 @@ static void dnbd_xfer_to_cache(dnbd_device_t * dnbd, struct sk_buff *skb,
 static int inline dnbd_recv_reply(dnbd_device_t * dnbd)
 {
 	mm_segment_t oldfs = get_fs();
-	int i;
 	unsigned int nsect = 0;
 	int err;
 	struct sk_buff *skb;
@@ -221,7 +223,12 @@ static int inline dnbd_recv_reply(dnbd_device_t * dnbd)
 	int remain, offset, tocopy;
 	dnbd_reply_t *reply;
 	struct request *req = NULL;
-	struct bio *bio;
+        #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
+		int i;
+		struct bio *bio;
+	#else
+		struct req_iterator iter;
+	#endif
 	struct bio_vec *bvec;
 	int tt;
 	void *kaddr;
@@ -306,8 +313,12 @@ static int inline dnbd_recv_reply(dnbd_device_t * dnbd)
 	nsect = 0;
 	err = 0;
 	/* copy network data to BIOs */
-	rq_for_each_bio(bio, req) {
-		bio_for_each_segment(bvec, bio, i) {
+        #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
+        rq_for_each_bio(bio, req) {
+                bio_for_each_segment(bvec, bio, i) {
+        #else
+        rq_for_each_segment(bvec, req, iter) {
+        #endif
 			tocopy = bvec->bv_len;
 			if (tocopy > remain)
 				goto nobytesleft;
@@ -329,7 +340,9 @@ static int inline dnbd_recv_reply(dnbd_device_t * dnbd)
 			offset += tocopy;
 			remain -= tocopy;
 			nsect += bvec->bv_len >> 9;
+        #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
 		}
+	#endif
 	}
       nobytesleft:
 	/* end request partially or fully */
@@ -1160,7 +1173,9 @@ static int __init dnbd_init(void)
 	printk(KERN_INFO "dnbd: module loaded with major %i\n",
 	       dnbd_major);
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 	devfs_mk_dir("dnbd");
+#endif
 	for (i = 0; i < MAX_DNBD; i++) {
 		struct gendisk *disk = dnbd_dev[i].disk;
 		dnbd_dev[i].state = DNBD_STATE_LOADED;
@@ -1194,7 +1209,9 @@ static int __init dnbd_init(void)
 		disk->private_data = &dnbd_dev[i];
 		disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
 		sprintf(disk->disk_name, "dnbd%d", i);
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 		sprintf(disk->devfs_name, "dnbd/%d", i);
+		#endif
 		set_capacity(disk, 0);
 
 		/* initialize cache */
@@ -1243,7 +1260,9 @@ static void __exit dnbd_exit(void)
 			put_disk(disk);
 		}
 	}
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
 	devfs_remove("dnbd");
+	#endif
 	unregister_blkdev(dnbd_major, "dnbd");
 
 	for (i = 0; (i < MAX_DNBD && i < 100); i++) {
-- 
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