#include "spiffs.h" #include "spiffs_nucleus.h" static s32_t spiffs_page_data_check(spiffs *fs, spiffs_fd *fd, spiffs_page_ix pix, spiffs_span_ix spix) { s32_t res = SPIFFS_OK; if (pix == (spiffs_page_ix)-1) { // referring to page 0xffff...., bad object index return SPIFFS_ERR_INDEX_REF_FREE; } if (pix % SPIFFS_PAGES_PER_BLOCK(fs) < SPIFFS_OBJ_LOOKUP_PAGES(fs)) { // referring to an object lookup page, bad object index return SPIFFS_ERR_INDEX_REF_LU; } if (pix > SPIFFS_MAX_PAGES(fs)) { // referring to a bad page return SPIFFS_ERR_INDEX_REF_INVALID; } #if SPIFFS_PAGE_CHECK spiffs_page_header ph; res = _spiffs_rd( fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, pix), sizeof(spiffs_page_header), (u8_t *)&ph); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_DATA(ph, fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, spix); #endif return res; } #if !SPIFFS_READ_ONLY static s32_t spiffs_page_index_check(spiffs *fs, spiffs_fd *fd, spiffs_page_ix pix, spiffs_span_ix spix) { s32_t res = SPIFFS_OK; if (pix == (spiffs_page_ix)-1) { // referring to page 0xffff...., bad object index return SPIFFS_ERR_INDEX_FREE; } if (pix % SPIFFS_PAGES_PER_BLOCK(fs) < SPIFFS_OBJ_LOOKUP_PAGES(fs)) { // referring to an object lookup page, bad object index return SPIFFS_ERR_INDEX_LU; } if (pix > SPIFFS_MAX_PAGES(fs)) { // referring to a bad page return SPIFFS_ERR_INDEX_INVALID; } #if SPIFFS_PAGE_CHECK spiffs_page_header ph; res = _spiffs_rd( fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, pix), sizeof(spiffs_page_header), (u8_t *)&ph); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(ph, fd->obj_id, spix); #endif return res; } #endif // !SPIFFS_READ_ONLY #if !SPIFFS_CACHE s32_t spiffs_phys_rd( spiffs *fs, u32_t addr, u32_t len, u8_t *dst) { return SPIFFS_HAL_READ(fs, addr, len, dst); } s32_t spiffs_phys_wr( spiffs *fs, u32_t addr, u32_t len, u8_t *src) { return SPIFFS_HAL_WRITE(fs, addr, len, src); } #endif #if !SPIFFS_READ_ONLY s32_t spiffs_phys_cpy( spiffs *fs, spiffs_file fh, u32_t dst, u32_t src, u32_t len) { (void)fh; s32_t res; u8_t b[SPIFFS_COPY_BUFFER_STACK]; while (len > 0) { u32_t chunk_size = MIN(SPIFFS_COPY_BUFFER_STACK, len); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_MOVS, fh, src, chunk_size, b); SPIFFS_CHECK_RES(res); res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_MOVD, fh, dst, chunk_size, b); SPIFFS_CHECK_RES(res); len -= chunk_size; src += chunk_size; dst += chunk_size; } return SPIFFS_OK; } #endif // !SPIFFS_READ_ONLY // Find object lookup entry containing given id with visitor. // Iterate over object lookup pages in each block until a given object id entry is found. // When found, the visitor function is called with block index, entry index and user data. // If visitor returns SPIFFS_VIS_CONTINUE, the search goes on. Otherwise, the search will be // ended and visitor's return code is returned to caller. // If no visitor is given (0) the search returns on first entry with matching object id. // If no match is found in all look up, SPIFFS_VIS_END is returned. // @param fs the file system // @param starting_block the starting block to start search in // @param starting_lu_entry the look up index entry to start search in // @param flags ored combination of SPIFFS_VIS_CHECK_ID, SPIFFS_VIS_CHECK_PH, // SPIFFS_VIS_NO_WRAP // @param obj_id argument object id // @param v visitor callback function // @param user_const_p any const pointer, passed to the callback visitor function // @param user_var_p any pointer, passed to the callback visitor function // @param block_ix reported block index where match was found // @param lu_entry reported look up index where match was found s32_t spiffs_obj_lu_find_entry_visitor( spiffs *fs, spiffs_block_ix starting_block, int starting_lu_entry, u8_t flags, spiffs_obj_id obj_id, spiffs_visitor_f v, const void *user_const_p, void *user_var_p, spiffs_block_ix *block_ix, int *lu_entry) { s32_t res = SPIFFS_OK; s32_t entry_count = fs->block_count * SPIFFS_OBJ_LOOKUP_MAX_ENTRIES(fs); spiffs_block_ix cur_block = starting_block; u32_t cur_block_addr = starting_block * SPIFFS_CFG_LOG_BLOCK_SZ(fs); spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work; int cur_entry = starting_lu_entry; int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)); // wrap initial if (cur_entry >= (int)SPIFFS_OBJ_LOOKUP_MAX_ENTRIES(fs) - 1) { cur_entry = 0; cur_block++; cur_block_addr = cur_block * SPIFFS_CFG_LOG_BLOCK_SZ(fs); if (cur_block >= fs->block_count) { if (flags & SPIFFS_VIS_NO_WRAP) { return SPIFFS_VIS_END; } else { // block wrap cur_block = 0; cur_block_addr = 0; } } } // check each block while (res == SPIFFS_OK && entry_count > 0) { int obj_lookup_page = cur_entry / entries_per_page; // check each object lookup page while (res == SPIFFS_OK && obj_lookup_page < (int)SPIFFS_OBJ_LOOKUP_PAGES(fs)) { int entry_offset = obj_lookup_page * entries_per_page; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, cur_block_addr + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); // check each entry while (res == SPIFFS_OK && cur_entry - entry_offset < entries_per_page && // for non-last obj lookup pages cur_entry < (int)SPIFFS_OBJ_LOOKUP_MAX_ENTRIES(fs)) // for last obj lookup page { if ((flags & SPIFFS_VIS_CHECK_ID) == 0 || obj_lu_buf[cur_entry-entry_offset] == obj_id) { if (block_ix) *block_ix = cur_block; if (lu_entry) *lu_entry = cur_entry; if (v) { res = v( fs, (flags & SPIFFS_VIS_CHECK_PH) ? obj_id : obj_lu_buf[cur_entry-entry_offset], cur_block, cur_entry, user_const_p, user_var_p); if (res == SPIFFS_VIS_COUNTINUE || res == SPIFFS_VIS_COUNTINUE_RELOAD) { if (res == SPIFFS_VIS_COUNTINUE_RELOAD) { res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, cur_block_addr + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); SPIFFS_CHECK_RES(res); } res = SPIFFS_OK; cur_entry++; entry_count--; continue; } else { return res; } } else { return SPIFFS_OK; } } entry_count--; cur_entry++; } // per entry obj_lookup_page++; } // per object lookup page cur_entry = 0; cur_block++; cur_block_addr += SPIFFS_CFG_LOG_BLOCK_SZ(fs); if (cur_block >= fs->block_count) { if (flags & SPIFFS_VIS_NO_WRAP) { return SPIFFS_VIS_END; } else { // block wrap cur_block = 0; cur_block_addr = 0; } } } // per block SPIFFS_CHECK_RES(res); return SPIFFS_VIS_END; } #if !SPIFFS_READ_ONLY s32_t spiffs_erase_block( spiffs *fs, spiffs_block_ix bix) { s32_t res; u32_t addr = SPIFFS_BLOCK_TO_PADDR(fs, bix); s32_t size = SPIFFS_CFG_LOG_BLOCK_SZ(fs); // here we ignore res, just try erasing the block while (size > 0) { SPIFFS_DBG("erase %08x:%08x\n", addr, SPIFFS_CFG_PHYS_ERASE_SZ(fs)); SPIFFS_HAL_ERASE(fs, addr, SPIFFS_CFG_PHYS_ERASE_SZ(fs)); addr += SPIFFS_CFG_PHYS_ERASE_SZ(fs); size -= SPIFFS_CFG_PHYS_ERASE_SZ(fs); } fs->free_blocks++; // register erase count for this block res = _spiffs_wr(fs, SPIFFS_OP_C_WRTHRU | SPIFFS_OP_T_OBJ_LU2, 0, SPIFFS_ERASE_COUNT_PADDR(fs, bix), sizeof(spiffs_obj_id), (u8_t *)&fs->max_erase_count); SPIFFS_CHECK_RES(res); #if SPIFFS_USE_MAGIC // finally, write magic spiffs_obj_id magic = SPIFFS_MAGIC(fs, bix); res = _spiffs_wr(fs, SPIFFS_OP_C_WRTHRU | SPIFFS_OP_T_OBJ_LU2, 0, SPIFFS_MAGIC_PADDR(fs, bix), sizeof(spiffs_obj_id), (u8_t *)&magic); SPIFFS_CHECK_RES(res); #endif fs->max_erase_count++; if (fs->max_erase_count == SPIFFS_OBJ_ID_IX_FLAG) { fs->max_erase_count = 0; } return res; } #endif // !SPIFFS_READ_ONLY #if SPIFFS_USE_MAGIC && SPIFFS_USE_MAGIC_LENGTH && SPIFFS_SINGLETON==0 s32_t spiffs_probe( spiffs_config *cfg) { s32_t res; u32_t paddr; spiffs dummy_fs; // create a dummy fs struct just to be able to use macros memcpy(&dummy_fs.cfg, cfg, sizeof(spiffs_config)); dummy_fs.block_count = 0; // Read three magics, as one block may be in an aborted erase state. // At least two of these must contain magic and be in decreasing order. spiffs_obj_id magic[3]; spiffs_obj_id bix_count[3]; spiffs_block_ix bix; for (bix = 0; bix < 3; bix++) { paddr = SPIFFS_MAGIC_PADDR(&dummy_fs, bix); #if SPIFFS_HAL_CALLBACK_EXTRA // not any proper fs to report here, so callback with null // (cross fingers that no-one gets angry) res = cfg->hal_read_f((void *)0, paddr, sizeof(spiffs_obj_id), (u8_t *)&magic[bix]); #else res = cfg->hal_read_f(paddr, sizeof(spiffs_obj_id), (u8_t *)&magic[bix]); #endif bix_count[bix] = magic[bix] ^ SPIFFS_MAGIC(&dummy_fs, 0); SPIFFS_CHECK_RES(res); } // check that we have sane number of blocks if (bix_count[0] < 3) return SPIFFS_ERR_PROBE_TOO_FEW_BLOCKS; // check that the order is correct, take aborted erases in calculation // first block aborted erase if (magic[0] == (spiffs_obj_id)(-1) && bix_count[1] - bix_count[2] == 1) { return (bix_count[1]+1) * cfg->log_block_size; } // second block aborted erase if (magic[1] == (spiffs_obj_id)(-1) && bix_count[0] - bix_count[2] == 2) { return bix_count[0] * cfg->log_block_size; } // third block aborted erase if (magic[2] == (spiffs_obj_id)(-1) && bix_count[0] - bix_count[1] == 1) { return bix_count[0] * cfg->log_block_size; } // no block has aborted erase if (bix_count[0] - bix_count[1] == 1 && bix_count[1] - bix_count[2] == 1) { return bix_count[0] * cfg->log_block_size; } return SPIFFS_ERR_PROBE_NOT_A_FS; } #endif // SPIFFS_USE_MAGIC && SPIFFS_USE_MAGIC_LENGTH && SPIFFS_SINGLETON==0 static s32_t spiffs_obj_lu_scan_v( spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix bix, int ix_entry, const void *user_const_p, void *user_var_p) { (void)bix; (void)user_const_p; (void)user_var_p; if (obj_id == SPIFFS_OBJ_ID_FREE) { if (ix_entry == 0) { fs->free_blocks++; // todo optimize further, return SPIFFS_NEXT_BLOCK } } else if (obj_id == SPIFFS_OBJ_ID_DELETED) { fs->stats_p_deleted++; } else { fs->stats_p_allocated++; } return SPIFFS_VIS_COUNTINUE; } // Scans thru all obj lu and counts free, deleted and used pages // Find the maximum block erase count // Checks magic if enabled s32_t spiffs_obj_lu_scan( spiffs *fs) { s32_t res; spiffs_block_ix bix; int entry; #if SPIFFS_USE_MAGIC spiffs_block_ix unerased_bix = (spiffs_block_ix)-1; #endif // find out erase count // if enabled, check magic bix = 0; spiffs_obj_id erase_count_final; spiffs_obj_id erase_count_min = SPIFFS_OBJ_ID_FREE; spiffs_obj_id erase_count_max = 0; while (bix < fs->block_count) { #if SPIFFS_USE_MAGIC spiffs_obj_id magic; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_MAGIC_PADDR(fs, bix) , sizeof(spiffs_obj_id), (u8_t *)&magic); SPIFFS_CHECK_RES(res); if (magic != SPIFFS_MAGIC(fs, bix)) { if (unerased_bix == (spiffs_block_ix)-1) { // allow one unerased block as it might be powered down during an erase unerased_bix = bix; } else { // more than one unerased block, bail out SPIFFS_CHECK_RES(SPIFFS_ERR_NOT_A_FS); } } #endif spiffs_obj_id erase_count; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_ERASE_COUNT_PADDR(fs, bix) , sizeof(spiffs_obj_id), (u8_t *)&erase_count); SPIFFS_CHECK_RES(res); if (erase_count != SPIFFS_OBJ_ID_FREE) { erase_count_min = MIN(erase_count_min, erase_count); erase_count_max = MAX(erase_count_max, erase_count); } bix++; } if (erase_count_min == 0 && erase_count_max == SPIFFS_OBJ_ID_FREE) { // clean system, set counter to zero erase_count_final = 0; } else if (erase_count_max - erase_count_min > (SPIFFS_OBJ_ID_FREE)/2) { // wrap, take min erase_count_final = erase_count_min+1; } else { erase_count_final = erase_count_max+1; } fs->max_erase_count = erase_count_final; #if SPIFFS_USE_MAGIC if (unerased_bix != (spiffs_block_ix)-1) { // found one unerased block, remedy SPIFFS_DBG("mount: erase block %i\n", bix); #if SPIFFS_READ_ONLY res = SPIFFS_ERR_RO_ABORTED_OPERATION; #else res = spiffs_erase_block(fs, unerased_bix); #endif // SPIFFS_READ_ONLY SPIFFS_CHECK_RES(res); } #endif // count blocks fs->free_blocks = 0; fs->stats_p_allocated = 0; fs->stats_p_deleted = 0; res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_obj_lu_scan_v, 0, 0, &bix, &entry); if (res == SPIFFS_VIS_END) { res = SPIFFS_OK; } SPIFFS_CHECK_RES(res); return res; } #if !SPIFFS_READ_ONLY // Find free object lookup entry // Iterate over object lookup pages in each block until a free object id entry is found s32_t spiffs_obj_lu_find_free( spiffs *fs, spiffs_block_ix starting_block, int starting_lu_entry, spiffs_block_ix *block_ix, int *lu_entry) { s32_t res; if (!fs->cleaning && fs->free_blocks < 2) { res = spiffs_gc_quick(fs, 0); if (res == SPIFFS_ERR_NO_DELETED_BLOCKS) { res = SPIFFS_OK; } SPIFFS_CHECK_RES(res); if (fs->free_blocks < 2) { return SPIFFS_ERR_FULL; } } res = spiffs_obj_lu_find_id(fs, starting_block, starting_lu_entry, SPIFFS_OBJ_ID_FREE, block_ix, lu_entry); if (res == SPIFFS_OK) { fs->free_cursor_block_ix = *block_ix; fs->free_cursor_obj_lu_entry = *lu_entry; if (*lu_entry == 0) { fs->free_blocks--; } } if (res == SPIFFS_ERR_FULL) { SPIFFS_DBG("fs full\n"); } return res; } #endif // !SPIFFS_READ_ONLY // Find object lookup entry containing given id // Iterate over object lookup pages in each block until a given object id entry is found s32_t spiffs_obj_lu_find_id( spiffs *fs, spiffs_block_ix starting_block, int starting_lu_entry, spiffs_obj_id obj_id, spiffs_block_ix *block_ix, int *lu_entry) { s32_t res = spiffs_obj_lu_find_entry_visitor( fs, starting_block, starting_lu_entry, SPIFFS_VIS_CHECK_ID, obj_id, 0, 0, 0, block_ix, lu_entry); if (res == SPIFFS_VIS_END) { res = SPIFFS_ERR_NOT_FOUND; } return res; } static s32_t spiffs_obj_lu_find_id_and_span_v( spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix bix, int ix_entry, const void *user_const_p, void *user_var_p) { s32_t res; spiffs_page_header ph; spiffs_page_ix pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, ix_entry); res = _spiffs_rd(fs, 0, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, SPIFFS_PAGE_TO_PADDR(fs, pix), sizeof(spiffs_page_header), (u8_t *)&ph); SPIFFS_CHECK_RES(res); if (ph.obj_id == obj_id && ph.span_ix == *((spiffs_span_ix*)user_var_p) && (ph.flags & (SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_USED)) == SPIFFS_PH_FLAG_DELET && !((obj_id & SPIFFS_OBJ_ID_IX_FLAG) && (ph.flags & SPIFFS_PH_FLAG_IXDELE) == 0 && ph.span_ix == 0) && (user_const_p == 0 || *((const spiffs_page_ix*)user_const_p) != pix)) { return SPIFFS_OK; } else { return SPIFFS_VIS_COUNTINUE; } } // Find object lookup entry containing given id and span index // Iterate over object lookup pages in each block until a given object id entry is found s32_t spiffs_obj_lu_find_id_and_span( spiffs *fs, spiffs_obj_id obj_id, spiffs_span_ix spix, spiffs_page_ix exclusion_pix, spiffs_page_ix *pix) { s32_t res; spiffs_block_ix bix; int entry; res = spiffs_obj_lu_find_entry_visitor(fs, fs->cursor_block_ix, fs->cursor_obj_lu_entry, SPIFFS_VIS_CHECK_ID, obj_id, spiffs_obj_lu_find_id_and_span_v, exclusion_pix ? &exclusion_pix : 0, &spix, &bix, &entry); if (res == SPIFFS_VIS_END) { res = SPIFFS_ERR_NOT_FOUND; } SPIFFS_CHECK_RES(res); if (pix) { *pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry); } fs->cursor_block_ix = bix; fs->cursor_obj_lu_entry = entry; return res; } // Find object lookup entry containing given id and span index in page headers only // Iterate over object lookup pages in each block until a given object id entry is found s32_t spiffs_obj_lu_find_id_and_span_by_phdr( spiffs *fs, spiffs_obj_id obj_id, spiffs_span_ix spix, spiffs_page_ix exclusion_pix, spiffs_page_ix *pix) { s32_t res; spiffs_block_ix bix; int entry; res = spiffs_obj_lu_find_entry_visitor(fs, fs->cursor_block_ix, fs->cursor_obj_lu_entry, SPIFFS_VIS_CHECK_PH, obj_id, spiffs_obj_lu_find_id_and_span_v, exclusion_pix ? &exclusion_pix : 0, &spix, &bix, &entry); if (res == SPIFFS_VIS_END) { res = SPIFFS_ERR_NOT_FOUND; } SPIFFS_CHECK_RES(res); if (pix) { *pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry); } fs->cursor_block_ix = bix; fs->cursor_obj_lu_entry = entry; return res; } #if !SPIFFS_READ_ONLY // Allocates a free defined page with given obj_id // Occupies object lookup entry and page // data may be NULL; where only page header is stored, len and page_offs is ignored s32_t spiffs_page_allocate_data( spiffs *fs, spiffs_obj_id obj_id, spiffs_page_header *ph, u8_t *data, u32_t len, u32_t page_offs, u8_t finalize, spiffs_page_ix *pix) { s32_t res = SPIFFS_OK; spiffs_block_ix bix; int entry; // find free entry res = spiffs_obj_lu_find_free(fs, fs->free_cursor_block_ix, fs->free_cursor_obj_lu_entry, &bix, &entry); SPIFFS_CHECK_RES(res); // occupy page in object lookup res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT, 0, SPIFFS_BLOCK_TO_PADDR(fs, bix) + entry * sizeof(spiffs_obj_id), sizeof(spiffs_obj_id), (u8_t*)&obj_id); SPIFFS_CHECK_RES(res); fs->stats_p_allocated++; // write page header ph->flags &= ~SPIFFS_PH_FLAG_USED; res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, 0, SPIFFS_OBJ_LOOKUP_ENTRY_TO_PADDR(fs, bix, entry), sizeof(spiffs_page_header), (u8_t*)ph); SPIFFS_CHECK_RES(res); // write page data if (data) { res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, 0,SPIFFS_OBJ_LOOKUP_ENTRY_TO_PADDR(fs, bix, entry) + sizeof(spiffs_page_header) + page_offs, len, data); SPIFFS_CHECK_RES(res); } // finalize header if necessary if (finalize && (ph->flags & SPIFFS_PH_FLAG_FINAL)) { ph->flags &= ~SPIFFS_PH_FLAG_FINAL; res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, 0, SPIFFS_OBJ_LOOKUP_ENTRY_TO_PADDR(fs, bix, entry) + offsetof(spiffs_page_header, flags), sizeof(u8_t), (u8_t *)&ph->flags); SPIFFS_CHECK_RES(res); } // return written page if (pix) { *pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry); } return res; } #endif // !SPIFFS_READ_ONLY #if !SPIFFS_READ_ONLY // Moves a page from src to a free page and finalizes it. Updates page index. Page data is given in param page. // If page data is null, provided header is used for metainfo and page data is physically copied. s32_t spiffs_page_move( spiffs *fs, spiffs_file fh, u8_t *page_data, spiffs_obj_id obj_id, spiffs_page_header *page_hdr, spiffs_page_ix src_pix, spiffs_page_ix *dst_pix) { s32_t res; u8_t was_final = 0; spiffs_page_header *p_hdr; spiffs_block_ix bix; int entry; spiffs_page_ix free_pix; // find free entry res = spiffs_obj_lu_find_free(fs, fs->free_cursor_block_ix, fs->free_cursor_obj_lu_entry, &bix, &entry); SPIFFS_CHECK_RES(res); free_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry); if (dst_pix) *dst_pix = free_pix; p_hdr = page_data ? (spiffs_page_header *)page_data : page_hdr; if (page_data) { // got page data was_final = (p_hdr->flags & SPIFFS_PH_FLAG_FINAL) == 0; // write unfinalized page p_hdr->flags |= SPIFFS_PH_FLAG_FINAL; p_hdr->flags &= ~SPIFFS_PH_FLAG_USED; res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, 0, SPIFFS_PAGE_TO_PADDR(fs, free_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), page_data); } else { // copy page data res = spiffs_phys_cpy(fs, fh, SPIFFS_PAGE_TO_PADDR(fs, free_pix), SPIFFS_PAGE_TO_PADDR(fs, src_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs)); } SPIFFS_CHECK_RES(res); // mark entry in destination object lookup res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT, 0, SPIFFS_BLOCK_TO_PADDR(fs, SPIFFS_BLOCK_FOR_PAGE(fs, free_pix)) + SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, free_pix) * sizeof(spiffs_page_ix), sizeof(spiffs_obj_id), (u8_t *)&obj_id); SPIFFS_CHECK_RES(res); fs->stats_p_allocated++; if (was_final) { // mark finalized in destination page p_hdr->flags &= ~(SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_USED); res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, fh, SPIFFS_PAGE_TO_PADDR(fs, free_pix) + offsetof(spiffs_page_header, flags), sizeof(u8_t), (u8_t *)&p_hdr->flags); SPIFFS_CHECK_RES(res); } // mark source deleted res = spiffs_page_delete(fs, src_pix); return res; } #endif // !SPIFFS_READ_ONLY #if !SPIFFS_READ_ONLY // Deletes a page and removes it from object lookup. s32_t spiffs_page_delete( spiffs *fs, spiffs_page_ix pix) { s32_t res; spiffs_page_header hdr; hdr.flags = 0xff & ~(SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_USED); // mark deleted entry in source object lookup spiffs_obj_id d_obj_id = SPIFFS_OBJ_ID_DELETED; res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_DELE, 0, SPIFFS_BLOCK_TO_PADDR(fs, SPIFFS_BLOCK_FOR_PAGE(fs, pix)) + SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, pix) * sizeof(spiffs_page_ix), sizeof(spiffs_obj_id), (u8_t *)&d_obj_id); SPIFFS_CHECK_RES(res); fs->stats_p_deleted++; fs->stats_p_allocated--; // mark deleted in source page res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_DELE, 0, SPIFFS_PAGE_TO_PADDR(fs, pix) + offsetof(spiffs_page_header, flags), sizeof(u8_t), (u8_t *)&hdr.flags); return res; } #endif // !SPIFFS_READ_ONLY #if !SPIFFS_READ_ONLY // Create an object index header page with empty index and undefined length s32_t spiffs_object_create( spiffs *fs, spiffs_obj_id obj_id, const u8_t name[SPIFFS_OBJ_NAME_LEN], spiffs_obj_type type, spiffs_page_ix *objix_hdr_pix) { s32_t res = SPIFFS_OK; spiffs_block_ix bix; spiffs_page_object_ix_header oix_hdr; int entry; res = spiffs_gc_check(fs, SPIFFS_DATA_PAGE_SIZE(fs)); SPIFFS_CHECK_RES(res); obj_id |= SPIFFS_OBJ_ID_IX_FLAG; // find free entry res = spiffs_obj_lu_find_free(fs, fs->free_cursor_block_ix, fs->free_cursor_obj_lu_entry, &bix, &entry); SPIFFS_CHECK_RES(res); SPIFFS_DBG("create: found free page @ %04x bix:%i entry:%i\n", SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry), bix, entry); // occupy page in object lookup res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT, 0, SPIFFS_BLOCK_TO_PADDR(fs, bix) + entry * sizeof(spiffs_obj_id), sizeof(spiffs_obj_id), (u8_t*)&obj_id); SPIFFS_CHECK_RES(res); fs->stats_p_allocated++; // write empty object index page oix_hdr.p_hdr.obj_id = obj_id; oix_hdr.p_hdr.span_ix = 0; oix_hdr.p_hdr.flags = 0xff & ~(SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_USED); oix_hdr.type = type; oix_hdr.size = SPIFFS_UNDEFINED_LEN; // keep ones so we can update later without wasting this page strncpy((char*)&oix_hdr.name, (const char*)name, SPIFFS_OBJ_NAME_LEN); // update page res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, 0, SPIFFS_OBJ_LOOKUP_ENTRY_TO_PADDR(fs, bix, entry), sizeof(spiffs_page_object_ix_header), (u8_t*)&oix_hdr); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, 0, SPIFFS_EV_IX_NEW, obj_id, 0, SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry), SPIFFS_UNDEFINED_LEN); if (objix_hdr_pix) { *objix_hdr_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry); } return res; } #endif // !SPIFFS_READ_ONLY #if !SPIFFS_READ_ONLY // update object index header with any combination of name/size/index // new_objix_hdr_data may be null, if so the object index header page is loaded // name may be null, if so name is not changed // size may be null, if so size is not changed s32_t spiffs_object_update_index_hdr( spiffs *fs, spiffs_fd *fd, spiffs_obj_id obj_id, spiffs_page_ix objix_hdr_pix, u8_t *new_objix_hdr_data, const u8_t name[SPIFFS_OBJ_NAME_LEN], u32_t size, spiffs_page_ix *new_pix) { s32_t res = SPIFFS_OK; spiffs_page_object_ix_header *objix_hdr; spiffs_page_ix new_objix_hdr_pix; obj_id |= SPIFFS_OBJ_ID_IX_FLAG; if (new_objix_hdr_data) { // object index header page already given to us, no need to load it objix_hdr = (spiffs_page_object_ix_header *)new_objix_hdr_data; } else { // read object index header page res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, objix_hdr_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); objix_hdr = (spiffs_page_object_ix_header *)fs->work; } SPIFFS_VALIDATE_OBJIX(objix_hdr->p_hdr, obj_id, 0); // change name if (name) { strncpy((char*)objix_hdr->name, (const char*)name, SPIFFS_OBJ_NAME_LEN); } if (size) { objix_hdr->size = size; } // move and update page res = spiffs_page_move(fs, fd == 0 ? 0 : fd->file_nbr, (u8_t*)objix_hdr, obj_id, 0, objix_hdr_pix, &new_objix_hdr_pix); if (res == SPIFFS_OK) { if (new_pix) { *new_pix = new_objix_hdr_pix; } // callback on object index update spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD, obj_id, objix_hdr->p_hdr.span_ix, new_objix_hdr_pix, objix_hdr->size); if (fd) fd->objix_hdr_pix = new_objix_hdr_pix; // if this is not in the registered cluster } return res; } #endif // !SPIFFS_READ_ONLY void spiffs_cb_object_event( spiffs *fs, spiffs_fd *fd, int ev, spiffs_obj_id obj_id_raw, spiffs_span_ix spix, spiffs_page_ix new_pix, u32_t new_size) { (void)fd; // update index caches in all file descriptors spiffs_obj_id obj_id = obj_id_raw & ~SPIFFS_OBJ_ID_IX_FLAG; u32_t i; spiffs_fd *fds = (spiffs_fd *)fs->fd_space; for (i = 0; i < fs->fd_count; i++) { spiffs_fd *cur_fd = &fds[i]; if (cur_fd->file_nbr == 0 || (cur_fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG) != obj_id) continue; if (spix == 0) { if (ev == SPIFFS_EV_IX_NEW || ev == SPIFFS_EV_IX_UPD) { SPIFFS_DBG(" callback: setting fd %i:%04x objix_hdr_pix to %04x, size:%i\n", cur_fd->file_nbr, cur_fd->obj_id, new_pix, new_size); cur_fd->objix_hdr_pix = new_pix; if (new_size != 0) { cur_fd->size = new_size; } } else if (ev == SPIFFS_EV_IX_DEL) { cur_fd->file_nbr = 0; cur_fd->obj_id = SPIFFS_OBJ_ID_DELETED; } } if (cur_fd->cursor_objix_spix == spix) { if (ev == SPIFFS_EV_IX_NEW || ev == SPIFFS_EV_IX_UPD) { SPIFFS_DBG(" callback: setting fd %i:%04x span:%04x objix_pix to %04x\n", cur_fd->file_nbr, cur_fd->obj_id, spix, new_pix); cur_fd->cursor_objix_pix = new_pix; } else { cur_fd->cursor_objix_pix = 0; } } } // callback to user if object index header if (fs->file_cb_f && spix == 0 && (obj_id_raw & SPIFFS_OBJ_ID_IX_FLAG)) { spiffs_fileop_type op; if (ev == SPIFFS_EV_IX_NEW) { op = SPIFFS_CB_CREATED; } else if (ev == SPIFFS_EV_IX_UPD) { op = SPIFFS_CB_UPDATED; } else if (ev == SPIFFS_EV_IX_DEL) { op = SPIFFS_CB_DELETED; } else { SPIFFS_DBG(" callback: WARNING unknown callback event %02x\n", ev); return; // bail out } fs->file_cb_f(fs, op, obj_id, new_pix); } } // Open object by id s32_t spiffs_object_open_by_id( spiffs *fs, spiffs_obj_id obj_id, spiffs_fd *fd, spiffs_flags flags, spiffs_mode mode) { s32_t res = SPIFFS_OK; spiffs_page_ix pix; res = spiffs_obj_lu_find_id_and_span(fs, obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &pix); SPIFFS_CHECK_RES(res); res = spiffs_object_open_by_page(fs, pix, fd, flags, mode); return res; } // Open object by page index s32_t spiffs_object_open_by_page( spiffs *fs, spiffs_page_ix pix, spiffs_fd *fd, spiffs_flags flags, spiffs_mode mode) { (void)mode; s32_t res = SPIFFS_OK; spiffs_page_object_ix_header oix_hdr; spiffs_obj_id obj_id; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, pix), sizeof(spiffs_page_object_ix_header), (u8_t *)&oix_hdr); SPIFFS_CHECK_RES(res); spiffs_block_ix bix = SPIFFS_BLOCK_FOR_PAGE(fs, pix); int entry = SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, pix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, SPIFFS_BLOCK_TO_PADDR(fs, bix) + entry * sizeof(spiffs_obj_id), sizeof(spiffs_obj_id), (u8_t *)&obj_id); fd->fs = fs; fd->objix_hdr_pix = pix; fd->size = oix_hdr.size; fd->offset = 0; fd->cursor_objix_pix = pix; fd->cursor_objix_spix = 0; fd->obj_id = obj_id; fd->flags = flags; SPIFFS_VALIDATE_OBJIX(oix_hdr.p_hdr, fd->obj_id, 0); SPIFFS_DBG("open: fd %i is obj id %04x\n", fd->file_nbr, fd->obj_id); return res; } #if !SPIFFS_READ_ONLY // Append to object // keep current object index (header) page in fs->work buffer s32_t spiffs_object_append(spiffs_fd *fd, u32_t offset, u8_t *data, u32_t len) { spiffs *fs = fd->fs; s32_t res = SPIFFS_OK; u32_t written = 0; SPIFFS_DBG("append: %i bytes @ offs %i of size %i\n", len, offset, fd->size); if (offset > fd->size) { SPIFFS_DBG("append: offset reversed to size\n"); offset = fd->size; } res = spiffs_gc_check(fs, len + SPIFFS_DATA_PAGE_SIZE(fs)); // add an extra page of data worth for meta if (res != SPIFFS_OK) { SPIFFS_DBG("append: gc check fail %i\n", res); } SPIFFS_CHECK_RES(res); spiffs_page_object_ix_header *objix_hdr = (spiffs_page_object_ix_header *)fs->work; spiffs_page_object_ix *objix = (spiffs_page_object_ix *)fs->work; spiffs_page_header p_hdr; spiffs_span_ix cur_objix_spix = 0; spiffs_span_ix prev_objix_spix = (spiffs_span_ix)-1; spiffs_page_ix cur_objix_pix = fd->objix_hdr_pix; spiffs_page_ix new_objix_hdr_page; spiffs_span_ix data_spix = offset / SPIFFS_DATA_PAGE_SIZE(fs); spiffs_page_ix data_page; u32_t page_offs = offset % SPIFFS_DATA_PAGE_SIZE(fs); // write all data while (res == SPIFFS_OK && written < len) { // calculate object index page span index cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix); // handle storing and loading of object indices if (cur_objix_spix != prev_objix_spix) { // new object index page // within this clause we return directly if something fails, object index mess-up if (written > 0) { // store previous object index page, unless first pass SPIFFS_DBG("append: %04x store objix %04x:%04x, written %i\n", fd->obj_id, cur_objix_pix, prev_objix_spix, written); if (prev_objix_spix == 0) { // this is an update to object index header page objix_hdr->size = offset+written; if (offset == 0) { // was an empty object, update same page (size was 0xffffffff) res = spiffs_page_index_check(fs, fd, cur_objix_pix, 0); SPIFFS_CHECK_RES(res); res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, cur_objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); } else { // was a nonempty object, update to new page res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, fs->work, 0, offset+written, &new_objix_hdr_page); SPIFFS_CHECK_RES(res); SPIFFS_DBG("append: %04x store new objix_hdr, %04x:%04x, written %i\n", fd->obj_id, new_objix_hdr_page, 0, written); } } else { // this is an update to an object index page res = spiffs_page_index_check(fs, fd, cur_objix_pix, prev_objix_spix); SPIFFS_CHECK_RES(res); res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, cur_objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD,fd->obj_id, objix->p_hdr.span_ix, cur_objix_pix, 0); // update length in object index header page res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, 0, 0, offset+written, &new_objix_hdr_page); SPIFFS_CHECK_RES(res); SPIFFS_DBG("append: %04x store new size I %i in objix_hdr, %04x:%04x, written %i\n", fd->obj_id, offset+written, new_objix_hdr_page, 0, written); } fd->size = offset+written; fd->offset = offset+written; } // create or load new object index page if (cur_objix_spix == 0) { // load object index header page, must always exist SPIFFS_DBG("append: %04x load objixhdr page %04x:%04x\n", fd->obj_id, cur_objix_pix, cur_objix_spix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, cur_objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(objix_hdr->p_hdr, fd->obj_id, cur_objix_spix); } else { spiffs_span_ix len_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, (fd->size-1)/SPIFFS_DATA_PAGE_SIZE(fs)); // on subsequent passes, create a new object index page if (written > 0 || cur_objix_spix > len_objix_spix) { p_hdr.obj_id = fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG; p_hdr.span_ix = cur_objix_spix; p_hdr.flags = 0xff & ~(SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_INDEX); res = spiffs_page_allocate_data(fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, &p_hdr, 0, 0, 0, 1, &cur_objix_pix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_NEW, fd->obj_id, cur_objix_spix, cur_objix_pix, 0); // quick "load" of new object index page memset(fs->work, 0xff, SPIFFS_CFG_LOG_PAGE_SZ(fs)); memcpy(fs->work, &p_hdr, sizeof(spiffs_page_header)); SPIFFS_DBG("append: %04x create objix page, %04x:%04x, written %i\n", fd->obj_id , cur_objix_pix, cur_objix_spix, written); } else { // on first pass, we load existing object index page spiffs_page_ix pix; SPIFFS_DBG("append: %04x find objix span_ix:%04x\n", fd->obj_id, cur_objix_spix); if (fd->cursor_objix_spix == cur_objix_spix) { pix = fd->cursor_objix_pix; } else { res = spiffs_obj_lu_find_id_and_span(fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, cur_objix_spix, 0, &pix); SPIFFS_CHECK_RES(res); } SPIFFS_DBG("append: %04x found object index at page %04x [fd size %i]\n", fd->obj_id, pix, fd->size); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(objix_hdr->p_hdr, fd->obj_id, cur_objix_spix); cur_objix_pix = pix; } fd->cursor_objix_pix = cur_objix_pix; fd->cursor_objix_spix = cur_objix_spix; fd->offset = offset+written; fd->size = offset+written; } prev_objix_spix = cur_objix_spix; } // write data u32_t to_write = MIN(len-written, SPIFFS_DATA_PAGE_SIZE(fs) - page_offs); if (page_offs == 0) { // at beginning of a page, allocate and write a new page of data p_hdr.obj_id = fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG; p_hdr.span_ix = data_spix; p_hdr.flags = 0xff & ~(SPIFFS_PH_FLAG_FINAL); // finalize immediately res = spiffs_page_allocate_data(fs, fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, &p_hdr, &data[written], to_write, page_offs, 1, &data_page); SPIFFS_DBG("append: %04x store new data page, %04x:%04x offset:%i, len %i, written %i\n", fd->obj_id, data_page, data_spix, page_offs, to_write, written); } else { // append to existing page, fill out free data in existing page if (cur_objix_spix == 0) { // get data page from object index header page data_page = ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix]; } else { // get data page from object index page data_page = ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)]; } res = spiffs_page_data_check(fs, fd, data_page, data_spix); SPIFFS_CHECK_RES(res); res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, data_page) + sizeof(spiffs_page_header) + page_offs, to_write, &data[written]); SPIFFS_DBG("append: %04x store to existing data page, %04x:%04x offset:%i, len %i, written %i\n", fd->obj_id , data_page, data_spix, page_offs, to_write, written); } if (res != SPIFFS_OK) break; // update memory representation of object index page with new data page if (cur_objix_spix == 0) { // update object index header page ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix] = data_page; SPIFFS_DBG("append: %04x wrote page %04x to objix_hdr entry %02x in mem\n", fd->obj_id , data_page, data_spix); objix_hdr->size = offset+written; } else { // update object index page ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)] = data_page; SPIFFS_DBG("append: %04x wrote page %04x to objix entry %02x in mem\n", fd->obj_id , data_page, SPIFFS_OBJ_IX_ENTRY(fs, data_spix)); } // update internals page_offs = 0; data_spix++; written += to_write; } // while all data fd->size = offset+written; fd->offset = offset+written; fd->cursor_objix_pix = cur_objix_pix; fd->cursor_objix_spix = cur_objix_spix; // finalize updated object indices s32_t res2 = SPIFFS_OK; if (cur_objix_spix != 0) { // wrote beyond object index header page // write last modified object index page, unless object header index page SPIFFS_DBG("append: %04x store objix page, %04x:%04x, written %i\n", fd->obj_id, cur_objix_pix, cur_objix_spix, written); res2 = spiffs_page_index_check(fs, fd, cur_objix_pix, cur_objix_spix); SPIFFS_CHECK_RES(res2); res2 = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, cur_objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res2); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD, fd->obj_id, objix->p_hdr.span_ix, cur_objix_pix, 0); // update size in object header index page res2 = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, 0, 0, offset+written, &new_objix_hdr_page); SPIFFS_DBG("append: %04x store new size II %i in objix_hdr, %04x:%04x, written %i, res %i\n", fd->obj_id , offset+written, new_objix_hdr_page, 0, written, res2); SPIFFS_CHECK_RES(res2); } else { // wrote within object index header page if (offset == 0) { // wrote to empty object - simply update size and write whole page objix_hdr->size = offset+written; SPIFFS_DBG("append: %04x store fresh objix_hdr page, %04x:%04x, written %i\n", fd->obj_id , cur_objix_pix, cur_objix_spix, written); res2 = spiffs_page_index_check(fs, fd, cur_objix_pix, cur_objix_spix); SPIFFS_CHECK_RES(res2); res2 = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, cur_objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res2); // callback on object index update spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD, fd->obj_id, objix_hdr->p_hdr.span_ix, cur_objix_pix, objix_hdr->size); } else { // modifying object index header page, update size and make new copy res2 = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, fs->work, 0, offset+written, &new_objix_hdr_page); SPIFFS_DBG("append: %04x store modified objix_hdr page, %04x:%04x, written %i\n", fd->obj_id , new_objix_hdr_page, 0, written); SPIFFS_CHECK_RES(res2); } } return res; } // spiffs_object_append #endif // !SPIFFS_READ_ONLY #if !SPIFFS_READ_ONLY // Modify object // keep current object index (header) page in fs->work buffer s32_t spiffs_object_modify(spiffs_fd *fd, u32_t offset, u8_t *data, u32_t len) { spiffs *fs = fd->fs; s32_t res = SPIFFS_OK; u32_t written = 0; res = spiffs_gc_check(fs, len + SPIFFS_DATA_PAGE_SIZE(fs)); SPIFFS_CHECK_RES(res); spiffs_page_object_ix_header *objix_hdr = (spiffs_page_object_ix_header *)fs->work; spiffs_page_object_ix *objix = (spiffs_page_object_ix *)fs->work; spiffs_page_header p_hdr; spiffs_span_ix cur_objix_spix = 0; spiffs_span_ix prev_objix_spix = (spiffs_span_ix)-1; spiffs_page_ix cur_objix_pix = fd->objix_hdr_pix; spiffs_page_ix new_objix_hdr_pix; spiffs_span_ix data_spix = offset / SPIFFS_DATA_PAGE_SIZE(fs); spiffs_page_ix data_pix; u32_t page_offs = offset % SPIFFS_DATA_PAGE_SIZE(fs); // write all data while (res == SPIFFS_OK && written < len) { // calculate object index page span index cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix); // handle storing and loading of object indices if (cur_objix_spix != prev_objix_spix) { // new object index page // within this clause we return directly if something fails, object index mess-up if (written > 0) { // store previous object index (header) page, unless first pass if (prev_objix_spix == 0) { // store previous object index header page res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, fs->work, 0, 0, &new_objix_hdr_pix); SPIFFS_DBG("modify: store modified objix_hdr page, %04x:%04x, written %i\n", new_objix_hdr_pix, 0, written); SPIFFS_CHECK_RES(res); } else { // store new version of previous object index page spiffs_page_ix new_objix_pix; res = spiffs_page_index_check(fs, fd, cur_objix_pix, prev_objix_spix); SPIFFS_CHECK_RES(res); res = spiffs_page_move(fs, fd->file_nbr, (u8_t*)objix, fd->obj_id, 0, cur_objix_pix, &new_objix_pix); SPIFFS_DBG("modify: store previous modified objix page, %04x:%04x, written %i\n", new_objix_pix, objix->p_hdr.span_ix, written); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD, fd->obj_id, objix->p_hdr.span_ix, new_objix_pix, 0); } } // load next object index page if (cur_objix_spix == 0) { // load object index header page, must exist SPIFFS_DBG("modify: load objixhdr page %04x:%04x\n", cur_objix_pix, cur_objix_spix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, cur_objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(objix_hdr->p_hdr, fd->obj_id, cur_objix_spix); } else { // load existing object index page on first pass spiffs_page_ix pix; SPIFFS_DBG("modify: find objix span_ix:%04x\n", cur_objix_spix); if (fd->cursor_objix_spix == cur_objix_spix) { pix = fd->cursor_objix_pix; } else { res = spiffs_obj_lu_find_id_and_span(fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, cur_objix_spix, 0, &pix); SPIFFS_CHECK_RES(res); } SPIFFS_DBG("modify: found object index at page %04x\n", pix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(objix_hdr->p_hdr, fd->obj_id, cur_objix_spix); cur_objix_pix = pix; } fd->cursor_objix_pix = cur_objix_pix; fd->cursor_objix_spix = cur_objix_spix; fd->offset = offset+written; prev_objix_spix = cur_objix_spix; } // write partial data u32_t to_write = MIN(len-written, SPIFFS_DATA_PAGE_SIZE(fs) - page_offs); spiffs_page_ix orig_data_pix; if (cur_objix_spix == 0) { // get data page from object index header page orig_data_pix = ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix]; } else { // get data page from object index page orig_data_pix = ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)]; } p_hdr.obj_id = fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG; p_hdr.span_ix = data_spix; p_hdr.flags = 0xff; if (page_offs == 0 && to_write == SPIFFS_DATA_PAGE_SIZE(fs)) { // a full page, allocate and write a new page of data res = spiffs_page_allocate_data(fs, fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, &p_hdr, &data[written], to_write, page_offs, 1, &data_pix); SPIFFS_DBG("modify: store new data page, %04x:%04x offset:%i, len %i, written %i\n", data_pix, data_spix, page_offs, to_write, written); } else { // write to existing page, allocate new and copy unmodified data res = spiffs_page_data_check(fs, fd, orig_data_pix, data_spix); SPIFFS_CHECK_RES(res); res = spiffs_page_allocate_data(fs, fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, &p_hdr, 0, 0, 0, 0, &data_pix); if (res != SPIFFS_OK) break; // copy unmodified data if (page_offs > 0) { // before modification res = spiffs_phys_cpy(fs, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, data_pix) + sizeof(spiffs_page_header), SPIFFS_PAGE_TO_PADDR(fs, orig_data_pix) + sizeof(spiffs_page_header), page_offs); if (res != SPIFFS_OK) break; } if (page_offs + to_write < SPIFFS_DATA_PAGE_SIZE(fs)) { // after modification res = spiffs_phys_cpy(fs, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, data_pix) + sizeof(spiffs_page_header) + page_offs + to_write, SPIFFS_PAGE_TO_PADDR(fs, orig_data_pix) + sizeof(spiffs_page_header) + page_offs + to_write, SPIFFS_DATA_PAGE_SIZE(fs) - (page_offs + to_write)); if (res != SPIFFS_OK) break; } res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, data_pix) + sizeof(spiffs_page_header) + page_offs, to_write, &data[written]); if (res != SPIFFS_OK) break; p_hdr.flags &= ~SPIFFS_PH_FLAG_FINAL; res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, data_pix) + offsetof(spiffs_page_header, flags), sizeof(u8_t), (u8_t *)&p_hdr.flags); if (res != SPIFFS_OK) break; SPIFFS_DBG("modify: store to existing data page, src:%04x, dst:%04x:%04x offset:%i, len %i, written %i\n", orig_data_pix, data_pix, data_spix, page_offs, to_write, written); } // delete original data page res = spiffs_page_delete(fs, orig_data_pix); if (res != SPIFFS_OK) break; // update memory representation of object index page with new data page if (cur_objix_spix == 0) { // update object index header page ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix] = data_pix; SPIFFS_DBG("modify: wrote page %04x to objix_hdr entry %02x in mem\n", data_pix, data_spix); } else { // update object index page ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)] = data_pix; SPIFFS_DBG("modify: wrote page %04x to objix entry %02x in mem\n", data_pix, SPIFFS_OBJ_IX_ENTRY(fs, data_spix)); } // update internals page_offs = 0; data_spix++; written += to_write; } // while all data fd->offset = offset+written; fd->cursor_objix_pix = cur_objix_pix; fd->cursor_objix_spix = cur_objix_spix; // finalize updated object indices s32_t res2 = SPIFFS_OK; if (cur_objix_spix != 0) { // wrote beyond object index header page // write last modified object index page // move and update page spiffs_page_ix new_objix_pix; res2 = spiffs_page_index_check(fs, fd, cur_objix_pix, cur_objix_spix); SPIFFS_CHECK_RES(res2); res2 = spiffs_page_move(fs, fd->file_nbr, (u8_t*)objix, fd->obj_id, 0, cur_objix_pix, &new_objix_pix); SPIFFS_DBG("modify: store modified objix page, %04x:%04x, written %i\n", new_objix_pix, cur_objix_spix, written); fd->cursor_objix_pix = new_objix_pix; fd->cursor_objix_spix = cur_objix_spix; SPIFFS_CHECK_RES(res2); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD, fd->obj_id, objix->p_hdr.span_ix, new_objix_pix, 0); } else { // wrote within object index header page res2 = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, fs->work, 0, 0, &new_objix_hdr_pix); SPIFFS_DBG("modify: store modified objix_hdr page, %04x:%04x, written %i\n", new_objix_hdr_pix, 0, written); SPIFFS_CHECK_RES(res2); } return res; } // spiffs_object_modify #endif // !SPIFFS_READ_ONLY static s32_t spiffs_object_find_object_index_header_by_name_v( spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix bix, int ix_entry, const void *user_const_p, void *user_var_p) { (void)user_var_p; s32_t res; spiffs_page_object_ix_header objix_hdr; spiffs_page_ix pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, ix_entry); if (obj_id == SPIFFS_OBJ_ID_FREE || obj_id == SPIFFS_OBJ_ID_DELETED || (obj_id & SPIFFS_OBJ_ID_IX_FLAG) == 0) { return SPIFFS_VIS_COUNTINUE; } res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, pix), sizeof(spiffs_page_object_ix_header), (u8_t *)&objix_hdr); SPIFFS_CHECK_RES(res); if (objix_hdr.p_hdr.span_ix == 0 && (objix_hdr.p_hdr.flags & (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_IXDELE)) == (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) { if (strcmp((const char*)user_const_p, (char*)objix_hdr.name) == 0) { return SPIFFS_OK; } } return SPIFFS_VIS_COUNTINUE; } // Finds object index header page by name s32_t spiffs_object_find_object_index_header_by_name( spiffs *fs, const u8_t name[SPIFFS_OBJ_NAME_LEN], spiffs_page_ix *pix) { s32_t res; spiffs_block_ix bix; int entry; res = spiffs_obj_lu_find_entry_visitor(fs, fs->cursor_block_ix, fs->cursor_obj_lu_entry, 0, 0, spiffs_object_find_object_index_header_by_name_v, name, 0, &bix, &entry); if (res == SPIFFS_VIS_END) { res = SPIFFS_ERR_NOT_FOUND; } SPIFFS_CHECK_RES(res); if (pix) { *pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry); } fs->cursor_block_ix = bix; fs->cursor_obj_lu_entry = entry; return res; } #if !SPIFFS_READ_ONLY // Truncates object to new size. If new size is null, object may be removed totally s32_t spiffs_object_truncate( spiffs_fd *fd, u32_t new_size, u8_t remove) { s32_t res = SPIFFS_OK; spiffs *fs = fd->fs; if ((fd->size == SPIFFS_UNDEFINED_LEN || fd->size == 0) && !remove) { // no op return res; } // need 2 pages if not removing: object index page + possibly chopped data page if (remove == 0) { res = spiffs_gc_check(fs, SPIFFS_DATA_PAGE_SIZE(fs) * 2); SPIFFS_CHECK_RES(res); } spiffs_page_ix objix_pix = fd->objix_hdr_pix; spiffs_span_ix data_spix = (fd->size > 0 ? fd->size-1 : 0) / SPIFFS_DATA_PAGE_SIZE(fs); u32_t cur_size = fd->size == (u32_t)SPIFFS_UNDEFINED_LEN ? 0 : fd->size ; spiffs_span_ix cur_objix_spix = 0; spiffs_span_ix prev_objix_spix = (spiffs_span_ix)-1; spiffs_page_object_ix_header *objix_hdr = (spiffs_page_object_ix_header *)fs->work; spiffs_page_object_ix *objix = (spiffs_page_object_ix *)fs->work; spiffs_page_ix data_pix; spiffs_page_ix new_objix_hdr_pix; // before truncating, check if object is to be fully removed and mark this if (remove && new_size == 0) { u8_t flags = ~( SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_IXDELE); res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, fd->objix_hdr_pix) + offsetof(spiffs_page_header, flags), sizeof(u8_t), (u8_t *)&flags); SPIFFS_CHECK_RES(res); } // delete from end of object until desired len is reached while (cur_size > new_size) { cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix); // put object index for current data span index in work buffer if (prev_objix_spix != cur_objix_spix) { if (prev_objix_spix != (spiffs_span_ix)-1) { // remove previous object index page SPIFFS_DBG("truncate: delete objix page %04x:%04x\n", objix_pix, prev_objix_spix); res = spiffs_page_index_check(fs, fd, objix_pix, prev_objix_spix); SPIFFS_CHECK_RES(res); res = spiffs_page_delete(fs, objix_pix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_DEL, fd->obj_id, objix->p_hdr.span_ix, objix_pix, 0); if (prev_objix_spix > 0) { // Update object index header page, unless we totally want to remove the file. // If fully removing, we're not keeping consistency as good as when storing the header between chunks, // would we be aborted. But when removing full files, a crammed system may otherwise // report ERR_FULL a la windows. We cannot have that. // Hence, take the risk - if aborted, a file check would free the lost pages and mend things // as the file is marked as fully deleted in the beginning. if (remove == 0) { SPIFFS_DBG("truncate: update objix hdr page %04x:%04x to size %i\n", fd->objix_hdr_pix, prev_objix_spix, cur_size); res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, 0, 0, cur_size, &new_objix_hdr_pix); SPIFFS_CHECK_RES(res); } fd->size = cur_size; } } // load current object index (header) page if (cur_objix_spix == 0) { objix_pix = fd->objix_hdr_pix; } else { res = spiffs_obj_lu_find_id_and_span(fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, cur_objix_spix, 0, &objix_pix); SPIFFS_CHECK_RES(res); } SPIFFS_DBG("truncate: load objix page %04x:%04x for data spix:%04x\n", objix_pix, cur_objix_spix, data_spix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(objix_hdr->p_hdr, fd->obj_id, cur_objix_spix); fd->cursor_objix_pix = objix_pix; fd->cursor_objix_spix = cur_objix_spix; fd->offset = cur_size; prev_objix_spix = cur_objix_spix; } if (cur_objix_spix == 0) { // get data page from object index header page data_pix = ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix]; ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix] = SPIFFS_OBJ_ID_FREE; } else { // get data page from object index page data_pix = ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)]; ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)] = SPIFFS_OBJ_ID_FREE; } SPIFFS_DBG("truncate: got data pix %04x\n", data_pix); if (new_size == 0 || remove || cur_size - new_size >= SPIFFS_DATA_PAGE_SIZE(fs)) { // delete full data page res = spiffs_page_data_check(fs, fd, data_pix, data_spix); if (res != SPIFFS_ERR_DELETED && res != SPIFFS_OK && res != SPIFFS_ERR_INDEX_REF_FREE) { SPIFFS_DBG("truncate: err validating data pix %i\n", res); break; } if (res == SPIFFS_OK) { res = spiffs_page_delete(fs, data_pix); if (res != SPIFFS_OK) { SPIFFS_DBG("truncate: err deleting data pix %i\n", res); break; } } else if (res == SPIFFS_ERR_DELETED || res == SPIFFS_ERR_INDEX_REF_FREE) { res = SPIFFS_OK; } // update current size if (cur_size % SPIFFS_DATA_PAGE_SIZE(fs) == 0) { cur_size -= SPIFFS_DATA_PAGE_SIZE(fs); } else { cur_size -= cur_size % SPIFFS_DATA_PAGE_SIZE(fs); } fd->size = cur_size; fd->offset = cur_size; SPIFFS_DBG("truncate: delete data page %04x for data spix:%04x, cur_size:%i\n", data_pix, data_spix, cur_size); } else { // delete last page, partially spiffs_page_header p_hdr; spiffs_page_ix new_data_pix; u32_t bytes_to_remove = SPIFFS_DATA_PAGE_SIZE(fs) - (new_size % SPIFFS_DATA_PAGE_SIZE(fs)); SPIFFS_DBG("truncate: delete %i bytes from data page %04x for data spix:%04x, cur_size:%i\n", bytes_to_remove, data_pix, data_spix, cur_size); res = spiffs_page_data_check(fs, fd, data_pix, data_spix); if (res != SPIFFS_OK) break; p_hdr.obj_id = fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG; p_hdr.span_ix = data_spix; p_hdr.flags = 0xff; // allocate new page and copy unmodified data res = spiffs_page_allocate_data(fs, fd->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, &p_hdr, 0, 0, 0, 0, &new_data_pix); if (res != SPIFFS_OK) break; res = spiffs_phys_cpy(fs, 0, SPIFFS_PAGE_TO_PADDR(fs, new_data_pix) + sizeof(spiffs_page_header), SPIFFS_PAGE_TO_PADDR(fs, data_pix) + sizeof(spiffs_page_header), SPIFFS_DATA_PAGE_SIZE(fs) - bytes_to_remove); if (res != SPIFFS_OK) break; // delete original data page res = spiffs_page_delete(fs, data_pix); if (res != SPIFFS_OK) break; p_hdr.flags &= ~SPIFFS_PH_FLAG_FINAL; res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, new_data_pix) + offsetof(spiffs_page_header, flags), sizeof(u8_t), (u8_t *)&p_hdr.flags); if (res != SPIFFS_OK) break; // update memory representation of object index page with new data page if (cur_objix_spix == 0) { // update object index header page ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix] = new_data_pix; SPIFFS_DBG("truncate: wrote page %04x to objix_hdr entry %02x in mem\n", new_data_pix, SPIFFS_OBJ_IX_ENTRY(fs, data_spix)); } else { // update object index page ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)] = new_data_pix; SPIFFS_DBG("truncate: wrote page %04x to objix entry %02x in mem\n", new_data_pix, SPIFFS_OBJ_IX_ENTRY(fs, data_spix)); } cur_size = new_size; fd->size = new_size; fd->offset = cur_size; break; } data_spix--; } // while all data // update object indices if (cur_objix_spix == 0) { // update object index header page if (cur_size == 0) { if (remove) { // remove object altogether SPIFFS_DBG("truncate: remove object index header page %04x\n", objix_pix); res = spiffs_page_index_check(fs, fd, objix_pix, 0); SPIFFS_CHECK_RES(res); res = spiffs_page_delete(fs, objix_pix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_DEL, fd->obj_id, 0, objix_pix, 0); } else { // make uninitialized object SPIFFS_DBG("truncate: reset objix_hdr page %04x\n", objix_pix); memset(fs->work + sizeof(spiffs_page_object_ix_header), 0xff, SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_object_ix_header)); res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, objix_pix, fs->work, 0, SPIFFS_UNDEFINED_LEN, &new_objix_hdr_pix); SPIFFS_CHECK_RES(res); } } else { // update object index header page SPIFFS_DBG("truncate: update object index header page with indices and size\n"); res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, objix_pix, fs->work, 0, cur_size, &new_objix_hdr_pix); SPIFFS_CHECK_RES(res); } } else { // update both current object index page and object index header page spiffs_page_ix new_objix_pix; res = spiffs_page_index_check(fs, fd, objix_pix, cur_objix_spix); SPIFFS_CHECK_RES(res); // move and update object index page res = spiffs_page_move(fs, fd->file_nbr, (u8_t*)objix_hdr, fd->obj_id, 0, objix_pix, &new_objix_pix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, fd, SPIFFS_EV_IX_UPD, fd->obj_id, objix->p_hdr.span_ix, new_objix_pix, 0); SPIFFS_DBG("truncate: store modified objix page, %04x:%04x\n", new_objix_pix, cur_objix_spix); fd->cursor_objix_pix = new_objix_pix; fd->cursor_objix_spix = cur_objix_spix; fd->offset = cur_size; // update object index header page with new size res = spiffs_object_update_index_hdr(fs, fd, fd->obj_id, fd->objix_hdr_pix, 0, 0, cur_size, &new_objix_hdr_pix); SPIFFS_CHECK_RES(res); } fd->size = cur_size; return res; } // spiffs_object_truncate #endif // !SPIFFS_READ_ONLY s32_t spiffs_object_read( spiffs_fd *fd, u32_t offset, u32_t len, u8_t *dst) { s32_t res = SPIFFS_OK; spiffs *fs = fd->fs; spiffs_page_ix objix_pix; spiffs_page_ix data_pix; spiffs_span_ix data_spix = offset / SPIFFS_DATA_PAGE_SIZE(fs); u32_t cur_offset = offset; spiffs_span_ix cur_objix_spix; spiffs_span_ix prev_objix_spix = (spiffs_span_ix)-1; spiffs_page_object_ix_header *objix_hdr = (spiffs_page_object_ix_header *)fs->work; spiffs_page_object_ix *objix = (spiffs_page_object_ix *)fs->work; while (cur_offset < offset + len) { cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix); if (prev_objix_spix != cur_objix_spix) { // load current object index (header) page if (cur_objix_spix == 0) { objix_pix = fd->objix_hdr_pix; } else { SPIFFS_DBG("read: find objix %04x:%04x\n", fd->obj_id, cur_objix_spix); res = spiffs_obj_lu_find_id_and_span(fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, cur_objix_spix, 0, &objix_pix); SPIFFS_CHECK_RES(res); } SPIFFS_DBG("read: load objix page %04x:%04x for data spix:%04x\n", objix_pix, cur_objix_spix, data_spix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_IX | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); SPIFFS_VALIDATE_OBJIX(objix->p_hdr, fd->obj_id, cur_objix_spix); fd->offset = cur_offset; fd->cursor_objix_pix = objix_pix; fd->cursor_objix_spix = cur_objix_spix; prev_objix_spix = cur_objix_spix; } if (cur_objix_spix == 0) { // get data page from object index header page data_pix = ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[data_spix]; } else { // get data page from object index page data_pix = ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)]; } // all remaining data u32_t len_to_read = offset + len - cur_offset; // remaining data in page len_to_read = MIN(len_to_read, SPIFFS_DATA_PAGE_SIZE(fs) - (cur_offset % SPIFFS_DATA_PAGE_SIZE(fs))); // remaining data in file len_to_read = MIN(len_to_read, fd->size); SPIFFS_DBG("read: offset:%i rd:%i data spix:%04x is data_pix:%04x addr:%08x\n", cur_offset, len_to_read, data_spix, data_pix, SPIFFS_PAGE_TO_PADDR(fs, data_pix) + sizeof(spiffs_page_header) + (cur_offset % SPIFFS_DATA_PAGE_SIZE(fs))); if (len_to_read <= 0) { res = SPIFFS_ERR_END_OF_OBJECT; break; } res = spiffs_page_data_check(fs, fd, data_pix, data_spix); SPIFFS_CHECK_RES(res); res = _spiffs_rd( fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_READ, fd->file_nbr, SPIFFS_PAGE_TO_PADDR(fs, data_pix) + sizeof(spiffs_page_header) + (cur_offset % SPIFFS_DATA_PAGE_SIZE(fs)), len_to_read, dst); SPIFFS_CHECK_RES(res); dst += len_to_read; cur_offset += len_to_read; fd->offset = cur_offset; data_spix++; } return res; } #if !SPIFFS_READ_ONLY typedef struct { spiffs_obj_id min_obj_id; spiffs_obj_id max_obj_id; u32_t compaction; const u8_t *conflicting_name; } spiffs_free_obj_id_state; static s32_t spiffs_obj_lu_find_free_obj_id_bitmap_v(spiffs *fs, spiffs_obj_id id, spiffs_block_ix bix, int ix_entry, const void *user_const_p, void *user_var_p) { if (id != SPIFFS_OBJ_ID_FREE && id != SPIFFS_OBJ_ID_DELETED) { spiffs_obj_id min_obj_id = *((spiffs_obj_id*)user_var_p); const u8_t *conflicting_name = (const u8_t*)user_const_p; // if conflicting name parameter is given, also check if this name is found in object index hdrs if (conflicting_name && (id & SPIFFS_OBJ_ID_IX_FLAG)) { spiffs_page_ix pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, ix_entry); int res; spiffs_page_object_ix_header objix_hdr; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, pix), sizeof(spiffs_page_object_ix_header), (u8_t *)&objix_hdr); SPIFFS_CHECK_RES(res); if (objix_hdr.p_hdr.span_ix == 0 && (objix_hdr.p_hdr.flags & (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_IXDELE)) == (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) { if (strcmp((const char*)user_const_p, (char*)objix_hdr.name) == 0) { return SPIFFS_ERR_CONFLICTING_NAME; } } } id &= ~SPIFFS_OBJ_ID_IX_FLAG; u32_t bit_ix = (id-min_obj_id) & 7; int byte_ix = (id-min_obj_id) >> 3; if (byte_ix >= 0 && (u32_t)byte_ix < SPIFFS_CFG_LOG_PAGE_SZ(fs)) { fs->work[byte_ix] |= (1<conflicting_name && strcmp((const char *)state->conflicting_name, (char *)objix_hdr.name) == 0) { return SPIFFS_ERR_CONFLICTING_NAME; } id &= ~SPIFFS_OBJ_ID_IX_FLAG; if (id >= state->min_obj_id && id <= state->max_obj_id) { u8_t *map = (u8_t *)fs->work; int ix = (id - state->min_obj_id) / state->compaction; //SPIFFS_DBG("free_obj_id: add ix %i for id %04x min:%04x max%04x comp:%i\n", ix, id, state->min_obj_id, state->max_obj_id, state->compaction); map[ix]++; } } } return SPIFFS_VIS_COUNTINUE; } // Scans thru all object lookup for object index header pages. If total possible number of // object ids cannot fit into a work buffer, these are grouped. When a group containing free // object ids is found, the object lu is again scanned for object ids within group and bitmasked. // Finally, the bitmask is searched for a free id s32_t spiffs_obj_lu_find_free_obj_id(spiffs *fs, spiffs_obj_id *obj_id, const u8_t *conflicting_name) { s32_t res = SPIFFS_OK; u32_t max_objects = (fs->block_count * SPIFFS_OBJ_LOOKUP_MAX_ENTRIES(fs)) / 2; spiffs_free_obj_id_state state; spiffs_obj_id free_obj_id = SPIFFS_OBJ_ID_FREE; state.min_obj_id = 1; state.max_obj_id = max_objects + 1; if (state.max_obj_id & SPIFFS_OBJ_ID_IX_FLAG) { state.max_obj_id = ((spiffs_obj_id)-1) & ~SPIFFS_OBJ_ID_IX_FLAG; } state.compaction = 0; state.conflicting_name = conflicting_name; while (res == SPIFFS_OK && free_obj_id == SPIFFS_OBJ_ID_FREE) { if (state.max_obj_id - state.min_obj_id <= (spiffs_obj_id)SPIFFS_CFG_LOG_PAGE_SZ(fs)*8) { // possible to represent in bitmap u32_t i, j; SPIFFS_DBG("free_obj_id: BITM min:%04x max:%04x\n", state.min_obj_id, state.max_obj_id); memset(fs->work, 0, SPIFFS_CFG_LOG_PAGE_SZ(fs)); res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_obj_lu_find_free_obj_id_bitmap_v, conflicting_name, &state.min_obj_id, 0, 0); if (res == SPIFFS_VIS_END) res = SPIFFS_OK; SPIFFS_CHECK_RES(res); // traverse bitmask until found free obj_id for (i = 0; i < SPIFFS_CFG_LOG_PAGE_SZ(fs); i++) { u8_t mask = fs->work[i]; if (mask == 0xff) { continue; } for (j = 0; j < 8; j++) { if ((mask & (1<work; u8_t min_count = 0xff; for (i = 0; i < SPIFFS_CFG_LOG_PAGE_SZ(fs)/sizeof(u8_t); i++) { if (map[i] < min_count) { min_count = map[i]; min_i = i; if (min_count == 0) { break; } } } if (min_count == state.compaction) { // there are no free objids! SPIFFS_DBG("free_obj_id: compacted table is full\n"); return SPIFFS_ERR_FULL; } SPIFFS_DBG("free_obj_id: COMP select index:%i min_count:%i min:%04x max:%04x compact:%i\n", min_i, min_count, state.min_obj_id, state.max_obj_id, state.compaction); if (min_count == 0) { // no id in this range, skip compacting and use directly *obj_id = min_i * state.compaction + state.min_obj_id; return SPIFFS_OK; } else { SPIFFS_DBG("free_obj_id: COMP SEL chunk:%04x min:%04x -> %04x\n", state.compaction, state.min_obj_id, state.min_obj_id + min_i * state.compaction); state.min_obj_id += min_i * state.compaction; state.max_obj_id = state.min_obj_id + state.compaction; // decrease compaction } if ((state.max_obj_id - state.min_obj_id <= (spiffs_obj_id)SPIFFS_CFG_LOG_PAGE_SZ(fs)*8)) { // no need for compacting, use bitmap continue; } } // in a work memory of log_page_size bytes, we may fit in log_page_size ids // todo what if compaction is > 255 - then we cannot fit it in a byte state.compaction = (state.max_obj_id-state.min_obj_id) / ((SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(u8_t))); SPIFFS_DBG("free_obj_id: COMP min:%04x max:%04x compact:%i\n", state.min_obj_id, state.max_obj_id, state.compaction); memset(fs->work, 0, SPIFFS_CFG_LOG_PAGE_SZ(fs)); res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_obj_lu_find_free_obj_id_compact_v, &state, 0, 0, 0); if (res == SPIFFS_VIS_END) res = SPIFFS_OK; SPIFFS_CHECK_RES(res); state.conflicting_name = 0; // searched for conflicting name once, no need to do it again } } return res; } #endif // !SPIFFS_READ_ONLY s32_t spiffs_fd_find_new(spiffs *fs, spiffs_fd **fd) { u32_t i; spiffs_fd *fds = (spiffs_fd *)fs->fd_space; for (i = 0; i < fs->fd_count; i++) { spiffs_fd *cur_fd = &fds[i]; if (cur_fd->file_nbr == 0) { cur_fd->file_nbr = i+1; *fd = cur_fd; return SPIFFS_OK; } } return SPIFFS_ERR_OUT_OF_FILE_DESCS; } s32_t spiffs_fd_return(spiffs *fs, spiffs_file f) { if (f <= 0 || f > (s16_t)fs->fd_count) { return SPIFFS_ERR_BAD_DESCRIPTOR; } spiffs_fd *fds = (spiffs_fd *)fs->fd_space; spiffs_fd *fd = &fds[f-1]; if (fd->file_nbr == 0) { return SPIFFS_ERR_FILE_CLOSED; } fd->file_nbr = 0; return SPIFFS_OK; } s32_t spiffs_fd_get(spiffs *fs, spiffs_file f, spiffs_fd **fd) { if (f <= 0 || f > (s16_t)fs->fd_count) { return SPIFFS_ERR_BAD_DESCRIPTOR; } spiffs_fd *fds = (spiffs_fd *)fs->fd_space; *fd = &fds[f-1]; if ((*fd)->file_nbr == 0) { return SPIFFS_ERR_FILE_CLOSED; } return SPIFFS_OK; }