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	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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| 
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| #include "btrfs.h"
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| #include <u-boot/crc.h>
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| 
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| static u32 btrfs_crc32c_table[256];
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| 
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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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| 
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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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| 
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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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| 
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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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| 
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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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