btrfs progs v0.18 (required for 2.6.29-rc2)

btrfs progs v0.18 (required for 2.6.29-rc2)

[Chris Mason]

Hello everyone,

As mentioned in the ioctl update email, I've released btrfs v0.18.  This
only includes the ioctl change and none of the patches that I've been
queuing up for testing.

If you're using 2.6.29-rc2, you'll need to update if you plan on using
btrfsctl or btrfs-vol.

-chris

Re: btrfs progs v0.18 (required for 2.6.29-rc2)

[Gabor MICSKO]

On Sat, 2009-01-17 at 07:18 -0500, Chris Mason wrote:

> Hello everyone,

hi,

> As mentioned in the ioctl update email, I've released btrfs v0.18.  This
> only includes the ioctl change and none of the patches that I've been
> queuing up for testing.

With the following patches everything looks good on 2.6.27.

diff --git a/compat.h b/compat.h
index 7c4503e..74d2e32 100644
--- a/compat.h
+++ b/compat.h
@@ -4,4 +4,28 @@
 #define btrfs_drop_nlink(inode) drop_nlink(inode)
 #define btrfs_inc_nlink(inode)	inc_nlink(inode)
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 27)
+static inline struct dentry *d_obtain_alias(struct inode *inode)
+{
+       struct dentry *d;
+
+       if (!inode)
+               return NULL;
+       if (IS_ERR(inode))
+               return ERR_CAST(inode);
+
+       d = d_alloc_anon(inode);
+       if (!d)
+               iput(inode);
+       return d;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 28)
+# define  __pagevec_lru_add_file __pagevec_lru_add
+# define open_bdev_exclusive open_bdev_excl
+# define close_bdev_exclusive(bdev, mode) close_bdev_excl(bdev)
+typedef unsigned __bitwise__ fmode_t;
+#endif
+
 #endif /* _COMPAT_H_ */
diff --git a/extent-tree.c b/extent-tree.c
index 293da65..41fc059 100644
--- a/extent-tree.c
+++ b/extent-tree.c
@@ -869,7 +869,11 @@ static noinline int remove_extent_backref(struct
btrfs_trans_handle *trans,
 static void btrfs_issue_discard(struct block_device *bdev,
 				u64 start, u64 len)
 {
-	blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+       blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL);
+#else
+       blkdev_issue_discard(bdev, start >> 9, len >> 9);
+#endif
 }
 #endif