linux-kernel - Re: [PATCH 03/10] AXFS: axfs.h

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Message-ID: <48AD1E66.40307@de.ibm.com>
Date:	Thu, 21 Aug 2008 09:51:02 +0200
From:	Carsten Otte <cotte@...ibm.com>
To:	jaredeh@...il.com
CC:	Linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	Jörn Engel <joern@...fs.org>,
	tim.bird@...SONY.COM, nickpiggin@...oo.com.au
Subject: Re: [PATCH 03/10] AXFS: axfs.h

Jared Hulbert wrote:
> +#define AXFS_GET_BYTETABLE_VAL(desc,index) \
> +  axfs_bytetable_stitch(((struct axfs_region_desc)(desc)).table_byte_depth,\
> +  (u8 *)((struct axfs_region_desc)(desc)).virt_addr, index)
> +
> +#define AXFS_GET_NODE_TYPE(sbi,node_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->node_type,\
> +   (node_index))
> +
> +#define AXFS_GET_NODE_INDEX(sbi,node__index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->node_index,\
> +   (node__index))
> +
> +#define AXFS_IS_NODE_XIP(sbi,node_index) \
> +  (AXFS_GET_NODE_TYPE(sbi, (node_index)) == XIP)
> +
> +#define AXFS_GET_CNODE_INDEX(sbi,node_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->cnode_index,\
> +   (node_index))
> +
> +#define AXFS_GET_CNODE_OFFSET(desc,node_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->cnode_offset,\
> +   (node_index))
> +
> +#define AXFS_GET_BANODE_OFFSET(desc,node_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->banode_offset,\
> +   (node_index))
> +
> +#define AXFS_GET_CBLOCK_OFFSET(desc,node_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->cblock_offset,\
> +   (node_index))
> +
> +#define AXFS_GET_INODE_FILE_SIZE(sbi,inode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_file_size,\
> +   (inode_index))
> +
> +#define AXFS_GET_INODE_NAME_OFFSET(sbi,inode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_name_offset,\
> +	(inode_index))
> +
> +#define AXFS_GET_INODE_NUM_ENTRIES(sbi,inode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_num_entries,\
> +	(inode_index))
> +
> +#define AXFS_GET_INODE_MODE_INDEX(sbi,inode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_mode_index,\
> +   (inode_index))
> +
> +#define AXFS_GET_INODE_ARRAY_INDEX(sbi,inode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->inode_array_index,\
> +   (inode_index))
> +
> +#define AXFS_GET_MODE(sbi,mode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->modes,\
> +  (AXFS_GET_INODE_MODE_INDEX(sbi, (mode_index))))
> +
> +#define AXFS_GET_UID(sbi,mode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->uids,\
> +  (AXFS_GET_INODE_MODE_INDEX(sbi, (mode_index))))
> +
> +#define AXFS_GET_GID(sbi,mode_index) \
> +  AXFS_GET_BYTETABLE_VAL(((struct axfs_super *)(sbi))->gids,\
> +  (AXFS_GET_INODE_MODE_INDEX(sbi, (mode_index))))
> +
> +#define AXFS_IS_REGION_COMPRESSED(_region) \
> +    (( \
> +     ((struct axfs_region_desc *)(_region))->compressed_size > \
> +     0 \
> +    ) ? TRUE : FALSE)
> +
> +#define AXFS_PHYSADDR_IS_VALID(sbi) \
> +    (((((struct axfs_super *)(sbi))->phys_start_addr) > 0 \
> +	) ? TRUE : FALSE)
> +
> +#define AXFS_VIRTADDR_IS_VALID(sbi) \
> +    (((((struct axfs_super *)(sbi))->virt_start_addr) > 0 \
> +	) ? TRUE : FALSE)
> +
> +#define AXFS_IS_IOMEM(sbi) \
> +    (((((struct axfs_super *)(sbi))->iomem_size) > 0) ? TRUE : FALSE)
> +
> +#define AXFS_IS_POINTED(sbi) \
> +    (((((struct axfs_super *)(sbi))->mtd_pointed) > 0) ? TRUE : FALSE)
> +
> +#define AXFS_IS_PHYSMEM(sbi) \
> +    (( \
> +      AXFS_PHYSADDR_IS_VALID(sbi) \
> +      && !AXFS_IS_IOMEM(sbi) \
> +      && !AXFS_IS_POINTED(sbi) \
> +    ) ? TRUE : FALSE)
> +
> +#define AXFS_IS_MMAPABLE(sbi,offset) \
> +    ((\
> +       (((struct axfs_super *)(sbi))->mmap_size) > (offset) \
> +    ) ? TRUE : FALSE)
> +
> +#define AXFS_IS_OFFSET_MMAPABLE(sbi,offset) \
> +    (( \
> +       AXFS_IS_MMAPABLE(sbi, offset) && AXFS_VIRTADDR_IS_VALID(sbi) \
> +     ) ? TRUE : FALSE)
> +
> +#define AXFS_IS_REGION_MMAPABLE(sbi,_region) \
> +    (( \
> +      AXFS_IS_MMAPABLE(sbi, ((struct axfs_region_desc *)(_region))->fsoffset) \
> +      && AXFS_VIRTADDR_IS_VALID(sbi) \
> +     ) ? TRUE : FALSE)
> +
> +#define AXFS_IS_REGION_INCORE(_region) \
> +    (((_region)->incore > 0) ? TRUE : FALSE)
> +
> +#define AXFS_IS_REGION_XIP(sbi,_region) \
> +    (( \
> +     !AXFS_IS_REGION_COMPRESSED(_region) && \
> +     !AXFS_IS_REGION_INCORE(_region) && \
> +     AXFS_IS_REGION_MMAPABLE(sbi,_region) \
> +    ) ? TRUE : FALSE)
> +
> +#define AXFS_GET_XIP_REGION_PHYSADDR(sbi) \
> +    (unsigned long)((sbi)->phys_start_addr + (sbi)->xip.fsoffset)
> +
> +#define AXFS_GET_INODE_NAME(sbi,inode_index) \
> +     (char *)( \
> +	(sbi)->strings.virt_addr \
> +	+ AXFS_GET_INODE_NAME_OFFSET(sbi,inode_index) \
> +     )
> +
> +#define AXFS_GET_CBLOCK_ADDRESS(sbi, cnode_index)\
> +    (unsigned long)( \
> +       (sbi)->compressed.virt_addr \
> +       + AXFS_GET_CBLOCK_OFFSET(sbi, cnode_index) \
> +    )
> +
> +#define AXFS_GET_NODE_ADDRESS(sbi,node__index) \
> +    (unsigned long)( \
> +       (sbi)->node_index.virt_addr \
> +       + AXFS_GET_NODE_INDEX(sbi, node__index) \
> +    )
> +
> +#define AXFS_GET_BANODE_ADDRESS(sbi,banode_index) \
> +    (unsigned long)( \
> +       (sbi)->byte_aligned.virt_addr \
> +       + AXFS_GET_BANODE_OFFSET(sbi, banode_index) \
> +    )
> +
> +#define AXFS_FSOFFSET_2_DEVOFFSET(sbi,fsoffset) \
> +    (( \
> +      ((sbi)->phys_start_addr == 0) && ((sbi)->virt_start_addr == 0) \
> +      ) ? (fsoffset) : (fsoffset - (sbi)->mmap_size) \
> +    )
> +
> +#define AXFS_GET_CBLOCK_LENGTH(sbi,cblock_index) \
> +    (u64)( \
> +      (u64)AXFS_GET_CBLOCK_OFFSET(sbi, ((u64)(cblock_index)+(u64)1)) \
> +      - (u64)AXFS_GET_CBLOCK_OFFSET(sbi, (cblock_index)) \
> +    )
> +
> +#ifndef TRUE
> +#define TRUE 1
> +#endif
> +#ifndef FALSE
> +#define FALSE 0
> +#endif
*Shrug*. That part reads scary. Are all those casts and macros really 
needed? Maybe it is worth considering to clean this up a little.
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