X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_tagscompat.c;h=fb5495fc535f6b147f602d49e8b09b625e3c63d0;hp=818f72bbc64c17ea8f47cc61133289f3c386dff1;hb=7dea5fe7a9a58636b5ce32fdbd58541c95c4a37d;hpb=b70ea39d4f2547564197afa8866b388301765583 diff --git a/yaffs_tagscompat.c b/yaffs_tagscompat.c index 818f72b..fb5495f 100644 --- a/yaffs_tagscompat.c +++ b/yaffs_tagscompat.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2010 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning @@ -22,7 +22,7 @@ static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk); /********** Tags ECC calculations *********/ -void yaffs_calc_ecc(const u8 * data, struct yaffs_spare *spare) +void yaffs_calc_ecc(const u8 *data, struct yaffs_spare *spare) { yaffs_ecc_cacl(data, spare->ecc1); yaffs_ecc_cacl(&data[256], spare->ecc2); @@ -31,7 +31,6 @@ void yaffs_calc_ecc(const u8 * data, struct yaffs_spare *spare) void yaffs_calc_tags_ecc(struct yaffs_tags *tags) { /* Calculate an ecc */ - unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; unsigned i, j; unsigned ecc = 0; @@ -46,9 +45,7 @@ void yaffs_calc_tags_ecc(struct yaffs_tags *tags) ecc ^= bit; } } - tags->ecc = ecc; - } int yaffs_check_tags_ecc(struct yaffs_tags *tags) @@ -76,7 +73,6 @@ int yaffs_check_tags_ecc(struct yaffs_tags *tags) /* TODO Need to do somethiong here */ return -1; /* unrecovered error */ } - return 0; } @@ -124,11 +120,11 @@ static void yaffs_get_tags_from_spare(struct yaffs_dev *dev, static void yaffs_spare_init(struct yaffs_spare *spare) { - memset(spare, 0xFF, sizeof(struct yaffs_spare)); + memset(spare, 0xff, sizeof(struct yaffs_spare)); } static int yaffs_wr_nand(struct yaffs_dev *dev, - int nand_chunk, const u8 * data, + int nand_chunk, const u8 *data, struct yaffs_spare *spare) { if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) { @@ -143,7 +139,7 @@ static int yaffs_wr_nand(struct yaffs_dev *dev, static int yaffs_rd_chunk_nand(struct yaffs_dev *dev, int nand_chunk, - u8 * data, + u8 *data, struct yaffs_spare *spare, enum yaffs_ecc_result *ecc_result, int correct_errors) @@ -268,9 +264,8 @@ static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk) int flash_block = nand_chunk / dev->param.chunks_per_block; /* Mark the block for retirement */ - yaffs_get_block_info(dev, - flash_block + dev->block_offset)->needs_retiring = - 1; + yaffs_get_block_info(dev, flash_block + dev->block_offset)-> + needs_retiring = 1; yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, "**>>Block %d marked for retirement", flash_block); @@ -284,20 +279,20 @@ static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk) int yaffs_tags_compat_wr(struct yaffs_dev *dev, int nand_chunk, - const u8 * data, const struct yaffs_ext_tags *ext_tags) + const u8 *data, const struct yaffs_ext_tags *ext_tags) { struct yaffs_spare spare; struct yaffs_tags tags; yaffs_spare_init(&spare); - + if (ext_tags->is_deleted) spare.page_status = 0; else { tags.obj_id = ext_tags->obj_id; tags.chunk_id = ext_tags->chunk_id; - tags.n_bytes_lsb = ext_tags->n_bytes & 0x3ff; + tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1); if (dev->data_bytes_per_chunk >= 1024) tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3; @@ -310,69 +305,61 @@ int yaffs_tags_compat_wr(struct yaffs_dev *dev, yaffs_calc_ecc(data, &spare); yaffs_load_tags_to_spare(&spare, &tags); - } - return yaffs_wr_nand(dev, nand_chunk, data, &spare); } int yaffs_tags_compat_rd(struct yaffs_dev *dev, int nand_chunk, - u8 * data, struct yaffs_ext_tags *ext_tags) + u8 *data, struct yaffs_ext_tags *ext_tags) { - struct yaffs_spare spare; struct yaffs_tags tags; enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN; - static struct yaffs_spare spare_ff; static int init; + int deleted; if (!init) { - memset(&spare_ff, 0xFF, sizeof(spare_ff)); + memset(&spare_ff, 0xff, sizeof(spare_ff)); init = 1; } - if (yaffs_rd_chunk_nand(dev, nand_chunk, data, &spare, &ecc_result, 1)) { - /* ext_tags may be NULL */ - if (ext_tags) { - - int deleted = - (hweight8(spare.page_status) < 7) ? 1 : 0; + if (!yaffs_rd_chunk_nand(dev, nand_chunk, + data, &spare, &ecc_result, 1)) + return YAFFS_FAIL; - ext_tags->is_deleted = deleted; - ext_tags->ecc_result = ecc_result; - ext_tags->block_bad = 0; /* We're reading it */ - /* therefore it is not a bad block */ - ext_tags->chunk_used = - (memcmp(&spare_ff, &spare, sizeof(spare_ff)) != - 0) ? 1 : 0; + /* ext_tags may be NULL */ + if (!ext_tags) + return YAFFS_OK; - if (ext_tags->chunk_used) { - yaffs_get_tags_from_spare(dev, &spare, &tags); + deleted = (hweight8(spare.page_status) < 7) ? 1 : 0; - ext_tags->obj_id = tags.obj_id; - ext_tags->chunk_id = tags.chunk_id; - ext_tags->n_bytes = tags.n_bytes_lsb; + ext_tags->is_deleted = deleted; + ext_tags->ecc_result = ecc_result; + ext_tags->block_bad = 0; /* We're reading it */ + /* therefore it is not a bad block */ + ext_tags->chunk_used = + memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0; - if (dev->data_bytes_per_chunk >= 1024) - ext_tags->n_bytes |= - (((unsigned)tags. - n_bytes_msb) << 10); + if (ext_tags->chunk_used) { + yaffs_get_tags_from_spare(dev, &spare, &tags); + ext_tags->obj_id = tags.obj_id; + ext_tags->chunk_id = tags.chunk_id; + ext_tags->n_bytes = tags.n_bytes_lsb; - ext_tags->serial_number = tags.serial_number; - } - } + if (dev->data_bytes_per_chunk >= 1024) + ext_tags->n_bytes |= + (((unsigned)tags.n_bytes_msb) << 10); - return YAFFS_OK; - } else { - return YAFFS_FAIL; + ext_tags->serial_number = tags.serial_number; } + + return YAFFS_OK; } int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) { - struct yaffs_spare spare; memset(&spare, 0xff, sizeof(struct yaffs_spare)); @@ -385,22 +372,20 @@ int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) NULL, &spare); return YAFFS_OK; - } int yaffs_tags_compat_query_block(struct yaffs_dev *dev, int block_no, enum yaffs_block_state *state, - u32 * seq_number) + u32 *seq_number) { - struct yaffs_spare spare0, spare1; static struct yaffs_spare spare_ff; static int init; enum yaffs_ecc_result dummy; if (!init) { - memset(&spare_ff, 0xFF, sizeof(spare_ff)); + memset(&spare_ff, 0xff, sizeof(spare_ff)); init = 1; } @@ -416,7 +401,7 @@ int yaffs_tags_compat_query_block(struct yaffs_dev *dev, else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0) *state = YAFFS_BLOCK_STATE_EMPTY; else - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; + *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; return YAFFS_OK; }