#include <linux/buffer_head.h>
#include <linux/ext2_fs_sb.h>
#include <linux/ext2_fs.h>
+#include <linux/blkdev.h>
#include "ext2.h"
#include "xip.h"
static inline int
-__inode_direct_access(struct inode *inode, sector_t sector,
- unsigned long *data)
+__inode_direct_access(struct inode *inode, sector_t block,
+ void **kaddr, unsigned long *pfn)
{
- BUG_ON(!inode->i_sb->s_bdev->bd_disk->fops->direct_access);
- return inode->i_sb->s_bdev->bd_disk->fops
- ->direct_access(inode->i_sb->s_bdev,sector,data);
+ struct block_device *bdev = inode->i_sb->s_bdev;
+ struct block_device_operations *ops = bdev->bd_disk->fops;
+ sector_t sector;
+
+ sector = block * (PAGE_SIZE / 512); /* ext2 block to bdev sector */
+
+ BUG_ON(!ops->direct_access);
+ return ops->direct_access(bdev, sector, kaddr, pfn);
}
static inline int
-__ext2_get_sector(struct inode *inode, sector_t offset, int create,
+__ext2_get_block(struct inode *inode, pgoff_t pgoff, int create,
sector_t *result)
{
struct buffer_head tmp;
int rc;
memset(&tmp, 0, sizeof(struct buffer_head));
- rc = ext2_get_block(inode, offset/ (PAGE_SIZE/512), &tmp,
- create);
+ rc = ext2_get_block(inode, pgoff, &tmp, create);
*result = tmp.b_blocknr;
/* did we get a sparse block (hole in the file)? */
}
int
-ext2_clear_xip_target(struct inode *inode, int block)
+ext2_clear_xip_target(struct inode *inode, sector_t block)
{
- sector_t sector = block * (PAGE_SIZE/512);
- unsigned long data;
+ void *kaddr;
+ unsigned long pfn;
int rc;
- rc = __inode_direct_access(inode, sector, &data);
+ rc = __inode_direct_access(inode, block, &kaddr, &pfn);
if (!rc)
- clear_page((void*)data);
+ clear_page(kaddr);
return rc;
}
if ((sbi->s_mount_opt & EXT2_MOUNT_XIP) &&
!sb->s_bdev->bd_disk->fops->direct_access) {
sbi->s_mount_opt &= (~EXT2_MOUNT_XIP);
- ext2_warning(sb, __FUNCTION__,
+ ext2_warning(sb, __func__,
"ignoring xip option - not supported by bdev");
}
}
-struct page *
-ext2_get_xip_page(struct address_space *mapping, sector_t offset,
- int create)
+int ext2_get_xip_mem(struct address_space *mapping, pgoff_t pgoff, int create,
+ void **kmem, unsigned long *pfn)
{
int rc;
- unsigned long data;
- sector_t sector;
+ sector_t block;
/* first, retrieve the sector number */
- rc = __ext2_get_sector(mapping->host, offset, create, §or);
+ rc = __ext2_get_block(mapping->host, pgoff, create, &block);
if (rc)
- goto error;
+ return rc;
/* retrieve address of the target data */
- rc = __inode_direct_access
- (mapping->host, sector * (PAGE_SIZE/512), &data);
- if (!rc)
- return virt_to_page(data);
-
- error:
- return ERR_PTR(rc);
+ rc = __inode_direct_access(mapping->host, block, kmem, pfn);
+ return rc;
}