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-rw-r--r--fs/squashfs/file.c25
-rw-r--r--fs/squashfs/file_direct.c8
-rw-r--r--fs/squashfs/squashfs.h1
3 files changed, 20 insertions, 14 deletions
diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c
index fcff2e0487fe..cce3060650ae 100644
--- a/fs/squashfs/file.c
+++ b/fs/squashfs/file.c
@@ -374,13 +374,29 @@ static int read_blocklist(struct inode *inode, int index, u64 *block)
return squashfs_block_size(size);
}
+void squashfs_fill_page(struct page *page, struct squashfs_cache_entry *buffer, int offset, int avail)
+{
+ int copied;
+ void *pageaddr;
+
+ pageaddr = kmap_atomic(page);
+ copied = squashfs_copy_data(pageaddr, buffer, offset, avail);
+ memset(pageaddr + copied, 0, PAGE_SIZE - copied);
+ kunmap_atomic(pageaddr);
+
+ flush_dcache_page(page);
+ if (copied == avail)
+ SetPageUptodate(page);
+ else
+ SetPageError(page);
+}
+
/* Copy data into page cache */
void squashfs_copy_cache(struct page *page, struct squashfs_cache_entry *buffer,
int bytes, int offset)
{
struct inode *inode = page->mapping->host;
struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
- void *pageaddr;
int i, mask = (1 << (msblk->block_log - PAGE_SHIFT)) - 1;
int start_index = page->index & ~mask, end_index = start_index | mask;
@@ -406,12 +422,7 @@ void squashfs_copy_cache(struct page *page, struct squashfs_cache_entry *buffer,
if (PageUptodate(push_page))
goto skip_page;
- pageaddr = kmap_atomic(push_page);
- squashfs_copy_data(pageaddr, buffer, offset, avail);
- memset(pageaddr + avail, 0, PAGE_SIZE - avail);
- kunmap_atomic(pageaddr);
- flush_dcache_page(push_page);
- SetPageUptodate(push_page);
+ squashfs_fill_page(push_page, buffer, offset, avail);
skip_page:
unlock_page(push_page);
if (i != page->index)
diff --git a/fs/squashfs/file_direct.c b/fs/squashfs/file_direct.c
index cb485d8e0e91..096990254a2e 100644
--- a/fs/squashfs/file_direct.c
+++ b/fs/squashfs/file_direct.c
@@ -144,7 +144,6 @@ static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
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;
if (res) {
ERROR("Unable to read page, block %llx, size %x\n", block,
@@ -159,12 +158,7 @@ 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]);
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index 887d6d270080..d8d43724cf2a 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -67,6 +67,7 @@ extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
u64, u64, unsigned int);
/* file.c */
+void squashfs_fill_page(struct page *, struct squashfs_cache_entry *, int, int);
void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int,
int);