summaryrefslogtreecommitdiffstats
path: root/fs/ext2/xip.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext2/xip.c')
-rw-r--r--fs/ext2/xip.c37
1 files changed, 15 insertions, 22 deletions
diff --git a/fs/ext2/xip.c b/fs/ext2/xip.c
index 430b4c8..233f7fd 100644
--- a/fs/ext2/xip.c
+++ b/fs/ext2/xip.c
@@ -15,26 +15,28 @@
#include "xip.h"
static inline int
-__inode_direct_access(struct inode *inode, sector_t sector,
+__inode_direct_access(struct inode *inode, sector_t block,
void **kaddr, unsigned long *pfn)
{
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)? */
@@ -47,14 +49,13 @@ __ext2_get_sector(struct inode *inode, sector_t offset, int create,
}
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);
void *kaddr;
unsigned long pfn;
int rc;
- rc = __inode_direct_access(inode, sector, &kaddr, &pfn);
+ rc = __inode_direct_access(inode, block, &kaddr, &pfn);
if (!rc)
clear_page(kaddr);
return rc;
@@ -72,26 +73,18 @@ void ext2_xip_verify_sb(struct super_block *sb)
}
}
-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;
- void *kaddr;
- unsigned long pfn;
- sector_t sector;
+ sector_t block;
/* first, retrieve the sector number */
- rc = __ext2_get_sector(mapping->host, offset, create, &sector);
+ 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), &kaddr, &pfn);
- if (!rc)
- return pfn_to_page(pfn);
-
- error:
- return ERR_PTR(rc);
+ rc = __inode_direct_access(mapping->host, block, kmem, pfn);
+ return rc;
}
OpenPOWER on IntegriCloud