| 1 | // SPDX-License-Identifier: GPL-2.0-only |
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| 2 | /* |
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| 3 | * Copyright (c) 2013 |
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| 4 | * Phillip Lougher <phillip@squashfs.org.uk> |
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| 5 | */ |
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| 6 | |
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| 7 | #include <linux/fs.h> |
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| 8 | #include <linux/vfs.h> |
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| 9 | #include <linux/kernel.h> |
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| 10 | #include <linux/slab.h> |
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| 11 | #include <linux/string.h> |
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| 12 | #include <linux/pagemap.h> |
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| 13 | #include <linux/mutex.h> |
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| 14 | |
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| 15 | #include "squashfs_fs.h" |
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| 16 | #include "squashfs_fs_sb.h" |
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| 17 | #include "squashfs_fs_i.h" |
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| 18 | #include "squashfs.h" |
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| 19 | |
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| 20 | /* Read separately compressed datablock and memcopy into page cache */ |
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| 21 | int squashfs_readpage_block(struct page *page, u64 block, int bsize, int expected) |
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| 22 | { |
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| 23 | struct inode *i = page->mapping->host; |
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| 24 | struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb, |
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| 25 | block, bsize); |
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| 26 | int res = buffer->error; |
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| 27 | |
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| 28 | if (res) |
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| 29 | ERROR("Unable to read page, block %llx, size %x\n" , block, |
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| 30 | bsize); |
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| 31 | else |
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| 32 | squashfs_copy_cache(page, buffer, expected, 0); |
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| 33 | |
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| 34 | squashfs_cache_put(buffer); |
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| 35 | return res; |
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| 36 | } |
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| 37 | |
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