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Diffstat (limited to 'fs/squashfs/file_direct.c')
-rw-r--r--fs/squashfs/file_direct.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/fs/squashfs/file_direct.c b/fs/squashfs/file_direct.c
index cb485d8e0e91..80db1b86a27c 100644
--- a/fs/squashfs/file_direct.c
+++ b/fs/squashfs/file_direct.c
@@ -21,10 +21,11 @@
#include "page_actor.h"
static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
- int pages, struct page **page);
+ int pages, struct page **page, int bytes);
/* Read separately compressed datablock directly into page cache */
-int squashfs_readpage_block(struct page *target_page, u64 block, int bsize)
+int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
+ int expected)
{
struct inode *inode = target_page->mapping->host;
@@ -83,7 +84,7 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize)
* using an intermediate buffer.
*/
res = squashfs_read_cache(target_page, block, bsize, pages,
- page);
+ page, expected);
if (res < 0)
goto mark_errored;
@@ -95,6 +96,11 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize)
if (res < 0)
goto mark_errored;
+ if (res != expected) {
+ res = -EIO;
+ goto mark_errored;
+ }
+
/* Last page may have trailing bytes not filled */
bytes = res % PAGE_SIZE;
if (bytes) {
@@ -138,13 +144,12 @@ out:
static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
- int pages, struct page **page)
+ int pages, struct page **page, int bytes)
{
struct inode *i = target_page->mapping->host;
struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
block, bsize);
- int bytes = buffer->length, res = buffer->error, n, offset = 0;
- void *pageaddr;
+ int res = buffer->error, n, offset = 0;
if (res) {
ERROR("Unable to read page, block %llx, size %x\n", block,
@@ -159,12 +164,7 @@ static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
if (page[n] == NULL)
continue;
- pageaddr = kmap_atomic(page[n]);
- squashfs_copy_data(pageaddr, buffer, offset, avail);
- memset(pageaddr + avail, 0, PAGE_SIZE - avail);
- kunmap_atomic(pageaddr);
- flush_dcache_page(page[n]);
- SetPageUptodate(page[n]);
+ squashfs_fill_page(page[n], buffer, offset, avail);
unlock_page(page[n]);
if (page[n] != target_page)
put_page(page[n]);