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20c8ccb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * Copyright (c) 2013 | |
4 | * Phillip Lougher <phillip@squashfs.org.uk> | |
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5 | */ |
6 | ||
7 | #include <linux/fs.h> | |
8 | #include <linux/vfs.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/string.h> | |
12 | #include <linux/pagemap.h> | |
13 | #include <linux/mutex.h> | |
14 | ||
15 | #include "squashfs_fs.h" | |
16 | #include "squashfs_fs_sb.h" | |
17 | #include "squashfs_fs_i.h" | |
18 | #include "squashfs.h" | |
19 | ||
20 | /* Read separately compressed datablock and memcopy into page cache */ | |
a3f94cb9 | 21 | int squashfs_readpage_block(struct page *page, u64 block, int bsize, int expected) |
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22 | { |
23 | struct inode *i = page->mapping->host; | |
24 | struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb, | |
25 | block, bsize); | |
26 | int res = buffer->error; | |
27 | ||
28 | if (res) | |
29 | ERROR("Unable to read page, block %llx, size %x\n", block, | |
30 | bsize); | |
31 | else | |
a3f94cb9 | 32 | squashfs_copy_cache(page, buffer, expected, 0); |
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33 | |
34 | squashfs_cache_put(buffer); | |
35 | return res; | |
36 | } |