[PATCH 2.5.74-mm2] nbd: make nbd and block layer agree about device and block sizes

[Paul Clements <Paul.Clements@SteelEye.com>]

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Andrew,

here's the revised patch for block and device size changes, using
set_blocksize() as Jeff suggested

Thanks,
Paul

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--- linux-2.5.74-mm2/drivers/block/nbd.c.MINUS_OPEN_RELEASE	2003-07-06 16:55:22.224389840 -0400
+++ linux-2.5.74-mm2/drivers/block/nbd.c	2003-07-06 16:50:46.287338648 -0400
@@ -588,18 +588,22 @@ static int nbd_ioctl(struct inode *inode
 		}
 		return error;
 	case NBD_SET_BLKSIZE:
-		if ((arg & (arg-1)) || (arg < 512) || (arg > PAGE_SIZE))
-			return -EINVAL;
 		lo->blksize = arg;
-		lo->bytesize &= ~(lo->blksize-1); 
+		lo->bytesize &= ~(lo->blksize-1);
+		inode->i_bdev->bd_inode->i_size = lo->bytesize;
+		set_blocksize(inode->i_bdev, lo->blksize);
 		set_capacity(lo->disk, lo->bytesize >> 9);
 		return 0;
 	case NBD_SET_SIZE:
-		lo->bytesize = arg & ~(lo->blksize-1); 
+		lo->bytesize = arg & ~(lo->blksize-1);
+		inode->i_bdev->bd_inode->i_size = lo->bytesize;
+		set_blocksize(inode->i_bdev, lo->blksize);
 		set_capacity(lo->disk, lo->bytesize >> 9);
 		return 0;
 	case NBD_SET_SIZE_BLOCKS:
 		lo->bytesize = ((u64) arg) * lo->blksize;
+		inode->i_bdev->bd_inode->i_size = lo->bytesize;
+		set_blocksize(inode->i_bdev, lo->blksize);
 		set_capacity(lo->disk, lo->bytesize >> 9);
 		return 0;
 	case NBD_DO_IT: