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https://github.com/brain-hackers/u-boot-brain
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![Marek Behún](/assets/img/avatar_default.png)
This adds the proper implementation for the BTRFS filesystem. The implementation currently supports only read-only mode and the filesystem can be only on a single device. Checksums of data chunks is unimplemented. Compression is implemented (ZLIB + LZO). Signed-off-by: Marek Behun <marek.behun@nic.cz> create mode 100644 fs/btrfs/btrfs.h create mode 100644 fs/btrfs/chunk-map.c create mode 100644 fs/btrfs/compression.c create mode 100644 fs/btrfs/ctree.c create mode 100644 fs/btrfs/dev.c create mode 100644 fs/btrfs/dir-item.c create mode 100644 fs/btrfs/extent-io.c create mode 100644 fs/btrfs/hash.c create mode 100644 fs/btrfs/inode.c create mode 100644 fs/btrfs/root.c create mode 100644 fs/btrfs/subvolume.c create mode 100644 fs/btrfs/super.c
39 lines
693 B
C
39 lines
693 B
C
/*
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* BTRFS filesystem implementation for U-Boot
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*
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* 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include "btrfs.h"
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#include <u-boot/crc.h>
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static u32 btrfs_crc32c_table[256];
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void btrfs_hash_init(void)
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{
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static int inited = 0;
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if (!inited) {
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crc32c_init(btrfs_crc32c_table, 0x82F63B78);
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inited = 1;
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}
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}
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u32 btrfs_crc32c(u32 crc, const void *data, size_t length)
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{
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return crc32c_cal(crc, (const char *) data, length,
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btrfs_crc32c_table);
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}
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u32 btrfs_csum_data(char *data, u32 seed, size_t len)
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{
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return btrfs_crc32c(seed, data, len);
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}
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void btrfs_csum_final(u32 crc, void *result)
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{
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*((u32 *) result) = cpu_to_le32(~crc);
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}
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