5f55dbc0c5
Restructure squashfs_readpage() splitting it into separate functions for datablocks, fragments and sparse blocks. Move the memcpying (from squashfs cache entry) implementation of squashfs_readpage_block into file_cache.c This allows different implementations to be supported. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reviewed-by: Minchan Kim <minchan@kernel.org>
38 lines
961 B
C
38 lines
961 B
C
/*
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* Copyright (c) 2013
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*/
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#include <linux/fs.h>
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#include <linux/vfs.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/pagemap.h>
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#include <linux/mutex.h>
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#include "squashfs_fs.h"
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#include "squashfs_fs_sb.h"
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#include "squashfs_fs_i.h"
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#include "squashfs.h"
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/* Read separately compressed datablock and memcopy into page cache */
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int squashfs_readpage_block(struct page *page, u64 block, int bsize)
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{
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struct inode *i = page->mapping->host;
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struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
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block, bsize);
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int res = buffer->error;
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if (res)
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ERROR("Unable to read page, block %llx, size %x\n", block,
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bsize);
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else
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squashfs_copy_cache(page, buffer, buffer->length, 0);
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squashfs_cache_put(buffer);
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return res;
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}
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