s32_t SPIFFS_lseek(spiffs *fs, spiffs_file fh, s32_t offs, int whence) { SPIFFS_API_CHECK_CFG(fs); SPIFFS_API_CHECK_MOUNT(fs); SPIFFS_LOCK(fs); spiffs_fd *fd; s32_t res; fh = SPIFFS_FH_UNOFFS(fs, fh); res = spiffs_fd_get(fs, fh, &fd); SPIFFS_API_CHECK_RES(fs, res); #if SPIFFS_CACHE_WR spiffs_fflush_cache(fs, fh); #endif switch (whence) { case SPIFFS_SEEK_CUR: offs = fd->fdoffset+offs; break; case SPIFFS_SEEK_END: offs = (fd->size == SPIFFS_UNDEFINED_LEN ? 0 : fd->size) + offs; break; } if ((offs > (s32_t)fd->size) && (SPIFFS_UNDEFINED_LEN != fd->size)) { res = SPIFFS_ERR_END_OF_OBJECT; } SPIFFS_API_CHECK_RES_UNLOCK(fs, res); spiffs_span_ix data_spix = offs / SPIFFS_DATA_PAGE_SIZE(fs); spiffs_span_ix objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix); if (fd->cursor_objix_spix != objix_spix) { spiffs_page_ix pix; res = spiffs_obj_lu_find_id_and_span( fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, objix_spix, 0, &pix); SPIFFS_API_CHECK_RES_UNLOCK(fs, res); fd->cursor_objix_spix = objix_spix; fd->cursor_objix_pix = pix; } fd->fdoffset = offs; SPIFFS_UNLOCK(fs); return offs; }
// Empties given block by moving all data into free pages of another block // Strategy: // loop: // scan object lookup for object data pages // for first found id, check spix and load corresponding object index page to memory // push object scan lookup entry index // rescan object lookup, find data pages with same id and referenced by same object index // move data page, update object index in memory // when reached end of lookup, store updated object index // pop object scan lookup entry index // repeat loop until end of object lookup // scan object lookup again for remaining object index pages, move to new page in other block // s32_t spiffs_gc_clean(spiffs *fs, spiffs_block_ix bix) { s32_t res = SPIFFS_OK; int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)); int cur_entry = 0; spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work; spiffs_gc gc; spiffs_page_ix cur_pix = 0; 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_GC_DBG("gc_clean: cleaning block %i\n", bix); c_memset(&gc, 0, sizeof(spiffs_gc)); gc.state = FIND_OBJ_DATA; if (fs->free_cursor_block_ix == bix) { // move free cursor to next block, cannot use free pages from the block we want to clean fs->free_cursor_block_ix = (bix+1)%fs->block_count; fs->free_cursor_obj_lu_entry = 0; SPIFFS_GC_DBG("gc_clean: move free cursor to block %i\n", fs->free_cursor_block_ix); } while (res == SPIFFS_OK && gc.state != FINISHED) { SPIFFS_GC_DBG("gc_clean: state = %i entry:%i\n", gc.state, cur_entry); gc.obj_id_found = 0; // scan through lookup pages int obj_lookup_page = cur_entry / entries_per_page; u8_t scan = 1; // check each object lookup page while (scan && 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, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); // check each entry while (scan && res == SPIFFS_OK && cur_entry - entry_offset < entries_per_page && cur_entry < (int)(SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))) { spiffs_obj_id obj_id = obj_lu_buf[cur_entry-entry_offset]; cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, cur_entry); // act upon object id depending on gc state switch (gc.state) { case FIND_OBJ_DATA: if (obj_id != SPIFFS_OBJ_ID_DELETED && obj_id != SPIFFS_OBJ_ID_FREE && ((obj_id & SPIFFS_OBJ_ID_IX_FLAG) == 0)) { SPIFFS_GC_DBG("gc_clean: FIND_DATA state:%i - found obj id %04x\n", gc.state, obj_id); gc.obj_id_found = 1; gc.cur_obj_id = obj_id; scan = 0; } break; case MOVE_OBJ_DATA: if (obj_id == gc.cur_obj_id) { spiffs_page_header p_hdr; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr); SPIFFS_CHECK_RES(res); SPIFFS_GC_DBG("gc_clean: MOVE_DATA found data page %04x:%04x @ %04x\n", gc.cur_obj_id, p_hdr.span_ix, cur_pix); if (SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, p_hdr.span_ix) != gc.cur_objix_spix) { SPIFFS_GC_DBG("gc_clean: MOVE_DATA no objix spix match, take in another run\n"); } else { spiffs_page_ix new_data_pix; if (p_hdr.flags & SPIFFS_PH_FLAG_DELET) { // move page res = spiffs_page_move(fs, 0, 0, obj_id, &p_hdr, cur_pix, &new_data_pix); SPIFFS_GC_DBG("gc_clean: MOVE_DATA move objix %04x:%04x page %04x to %04x\n", gc.cur_obj_id, p_hdr.span_ix, cur_pix, new_data_pix); SPIFFS_CHECK_RES(res); // move wipes obj_lu, reload it res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); SPIFFS_CHECK_RES(res); } else { // page is deleted but not deleted in lookup, scrap it SPIFFS_GC_DBG("gc_clean: MOVE_DATA wipe objix %04x:%04x page %04x\n", obj_id, p_hdr.span_ix, cur_pix); res = spiffs_page_delete(fs, cur_pix); SPIFFS_CHECK_RES(res); new_data_pix = SPIFFS_OBJ_ID_FREE; } // update memory representation of object index page with new data page if (gc.cur_objix_spix == 0) { // update object index header page ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[p_hdr.span_ix] = new_data_pix; SPIFFS_GC_DBG("gc_clean: MOVE_DATA wrote page %04x to objix_hdr entry %02x in mem\n", new_data_pix, SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)); } else { // update object index page ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)] = new_data_pix; SPIFFS_GC_DBG("gc_clean: MOVE_DATA wrote page %04x to objix entry %02x in mem\n", new_data_pix, SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)); } } } break; case MOVE_OBJ_IX: if (obj_id != SPIFFS_OBJ_ID_DELETED && obj_id != SPIFFS_OBJ_ID_FREE && (obj_id & SPIFFS_OBJ_ID_IX_FLAG)) { // found an index object id spiffs_page_header p_hdr; spiffs_page_ix new_pix; // load header res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr); SPIFFS_CHECK_RES(res); if (p_hdr.flags & SPIFFS_PH_FLAG_DELET) { // move page res = spiffs_page_move(fs, 0, 0, obj_id, &p_hdr, cur_pix, &new_pix); SPIFFS_GC_DBG("gc_clean: MOVE_OBJIX move objix %04x:%04x page %04x to %04x\n", obj_id, p_hdr.span_ix, cur_pix, new_pix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, 0, SPIFFS_EV_IX_UPD, obj_id, p_hdr.span_ix, new_pix, 0); // move wipes obj_lu, reload it res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); SPIFFS_CHECK_RES(res); } else { // page is deleted but not deleted in lookup, scrap it SPIFFS_GC_DBG("gc_clean: MOVE_OBJIX wipe objix %04x:%04x page %04x\n", obj_id, p_hdr.span_ix, cur_pix); res = spiffs_page_delete(fs, cur_pix); if (res == SPIFFS_OK) { spiffs_cb_object_event(fs, 0, SPIFFS_EV_IX_DEL, obj_id, p_hdr.span_ix, cur_pix, 0); } } SPIFFS_CHECK_RES(res); } break; default: scan = 0; break; } cur_entry++; } // per entry obj_lookup_page++; } // per object lookup page if (res != SPIFFS_OK) break; // state finalization and switch switch (gc.state) { case FIND_OBJ_DATA: if (gc.obj_id_found) { // find out corresponding obj ix page and load it to memory spiffs_page_header p_hdr; spiffs_page_ix objix_pix; gc.stored_scan_entry_index = cur_entry; cur_entry = 0; gc.state = MOVE_OBJ_DATA; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr); SPIFFS_CHECK_RES(res); gc.cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, p_hdr.span_ix); SPIFFS_GC_DBG("gc_clean: FIND_DATA find objix span_ix:%04x\n", gc.cur_objix_spix); res = spiffs_obj_lu_find_id_and_span(fs, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_spix, 0, &objix_pix); SPIFFS_CHECK_RES(res); SPIFFS_GC_DBG("gc_clean: FIND_DATA found object index at page %04x\n", objix_pix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, 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, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_spix); gc.cur_objix_pix = objix_pix; } else { gc.state = MOVE_OBJ_IX; cur_entry = 0; // restart entry scan index } break; case MOVE_OBJ_DATA: { // store modified objix (hdr) page spiffs_page_ix new_objix_pix; gc.state = FIND_OBJ_DATA; cur_entry = gc.stored_scan_entry_index; if (gc.cur_objix_spix == 0) { // store object index header page res = spiffs_object_update_index_hdr(fs, 0, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_pix, fs->work, 0, 0, &new_objix_pix); SPIFFS_GC_DBG("gc_clean: MOVE_DATA store modified objix_hdr page, %04x:%04x\n", new_objix_pix, 0); SPIFFS_CHECK_RES(res); } else { // store object index page res = spiffs_page_move(fs, 0, fs->work, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, gc.cur_objix_pix, &new_objix_pix); SPIFFS_GC_DBG("gc_clean: MOVE_DATA store modified objix page, %04x:%04x\n", new_objix_pix, objix->p_hdr.span_ix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, 0, SPIFFS_EV_IX_UPD, gc.cur_obj_id, objix->p_hdr.span_ix, new_objix_pix, 0); } } break; case MOVE_OBJ_IX: gc.state = FINISHED; break; default: cur_entry = 0; break; } SPIFFS_GC_DBG("gc_clean: state-> %i\n", gc.state); } // while state != FINISHED return res; }
// Empties given block by moving all data into free pages of another block // Strategy: // loop: // scan object lookup for object data pages // for first found id, check spix and load corresponding object index page to memory // push object scan lookup entry index // rescan object lookup, find data pages with same id and referenced by same object index // move data page, update object index in memory // when reached end of lookup, store updated object index // pop object scan lookup entry index // repeat loop until end of object lookup // scan object lookup again for remaining object index pages, move to new page in other block // s32_t spiffs_gc_clean(spiffs *fs, spiffs_block_ix bix) { s32_t res = SPIFFS_OK; const int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)); // this is the global localizer being pushed and popped int cur_entry = 0; spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work; spiffs_gc gc; // our stack frame/state spiffs_page_ix cur_pix = 0; 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_GC_DBG("gc_clean: cleaning block "_SPIPRIbl"\n", bix); memset(&gc, 0, sizeof(spiffs_gc)); gc.state = FIND_OBJ_DATA; if (fs->free_cursor_block_ix == bix) { // move free cursor to next block, cannot use free pages from the block we want to clean fs->free_cursor_block_ix = (bix+1)%fs->block_count; fs->free_cursor_obj_lu_entry = 0; SPIFFS_GC_DBG("gc_clean: move free cursor to block "_SPIPRIbl"\n", fs->free_cursor_block_ix); } while (res == SPIFFS_OK && gc.state != FINISHED) { SPIFFS_GC_DBG("gc_clean: state = "_SPIPRIi" entry:"_SPIPRIi"\n", gc.state, cur_entry); gc.obj_id_found = 0; // reset (to no found data page) // scan through lookup pages int obj_lookup_page = cur_entry / entries_per_page; u8_t scan = 1; // check each object lookup page while (scan && 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, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); // check each object lookup entry while (scan && res == SPIFFS_OK && cur_entry - entry_offset < entries_per_page && cur_entry < (int)(SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))) { spiffs_obj_id obj_id = obj_lu_buf[cur_entry-entry_offset]; cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, cur_entry); // act upon object id depending on gc state switch (gc.state) { case FIND_OBJ_DATA: // find a data page if (obj_id != SPIFFS_OBJ_ID_DELETED && obj_id != SPIFFS_OBJ_ID_FREE && ((obj_id & SPIFFS_OBJ_ID_IX_FLAG) == 0)) { // found a data page, stop scanning and handle in switch case below SPIFFS_GC_DBG("gc_clean: FIND_DATA state:"_SPIPRIi" - found obj id "_SPIPRIid"\n", gc.state, obj_id); gc.obj_id_found = 1; gc.cur_obj_id = obj_id; gc.cur_data_pix = cur_pix; scan = 0; } break; case MOVE_OBJ_DATA: // evacuate found data pages for corresponding object index we have in memory, // update memory representation if (obj_id == gc.cur_obj_id) { spiffs_page_header p_hdr; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr); SPIFFS_CHECK_RES(res); SPIFFS_GC_DBG("gc_clean: MOVE_DATA found data page "_SPIPRIid":"_SPIPRIsp" @ "_SPIPRIpg"\n", gc.cur_obj_id, p_hdr.span_ix, cur_pix); if (SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, p_hdr.span_ix) != gc.cur_objix_spix) { SPIFFS_GC_DBG("gc_clean: MOVE_DATA no objix spix match, take in another run\n"); } else { spiffs_page_ix new_data_pix; if (p_hdr.flags & SPIFFS_PH_FLAG_DELET) { // move page res = spiffs_page_move(fs, 0, 0, obj_id, &p_hdr, cur_pix, &new_data_pix); SPIFFS_GC_DBG("gc_clean: MOVE_DATA move objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg" to "_SPIPRIpg"\n", gc.cur_obj_id, p_hdr.span_ix, cur_pix, new_data_pix); SPIFFS_CHECK_RES(res); // move wipes obj_lu, reload it res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); SPIFFS_CHECK_RES(res); } else { // page is deleted but not deleted in lookup, scrap it - // might seem unnecessary as we will erase this block, but // we might get aborted SPIFFS_GC_DBG("gc_clean: MOVE_DATA wipe objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg"\n", obj_id, p_hdr.span_ix, cur_pix); res = spiffs_page_delete(fs, cur_pix); SPIFFS_CHECK_RES(res); new_data_pix = SPIFFS_OBJ_ID_FREE; } // update memory representation of object index page with new data page if (gc.cur_objix_spix == 0) { // update object index header page ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[p_hdr.span_ix] = new_data_pix; SPIFFS_GC_DBG("gc_clean: MOVE_DATA wrote page "_SPIPRIpg" to objix_hdr entry "_SPIPRIsp" in mem\n", new_data_pix, (spiffs_span_ix)SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)); } else { // update object index page ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)] = new_data_pix; SPIFFS_GC_DBG("gc_clean: MOVE_DATA wrote page "_SPIPRIpg" to objix entry "_SPIPRIsp" in mem\n", new_data_pix, (spiffs_span_ix)SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)); } } } break; case MOVE_OBJ_IX: // find and evacuate object index pages if (obj_id != SPIFFS_OBJ_ID_DELETED && obj_id != SPIFFS_OBJ_ID_FREE && (obj_id & SPIFFS_OBJ_ID_IX_FLAG)) { // found an index object id spiffs_page_header p_hdr; spiffs_page_ix new_pix; // load header res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr); SPIFFS_CHECK_RES(res); if (p_hdr.flags & SPIFFS_PH_FLAG_DELET) { // move page res = spiffs_page_move(fs, 0, 0, obj_id, &p_hdr, cur_pix, &new_pix); SPIFFS_GC_DBG("gc_clean: MOVE_OBJIX move objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg" to "_SPIPRIpg"\n", obj_id, p_hdr.span_ix, cur_pix, new_pix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, (spiffs_page_object_ix *)&p_hdr, SPIFFS_EV_IX_MOV, obj_id, p_hdr.span_ix, new_pix, 0); // move wipes obj_lu, reload it res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ, 0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work); SPIFFS_CHECK_RES(res); } else { // page is deleted but not deleted in lookup, scrap it - // might seem unnecessary as we will erase this block, but // we might get aborted SPIFFS_GC_DBG("gc_clean: MOVE_OBJIX wipe objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg"\n", obj_id, p_hdr.span_ix, cur_pix); res = spiffs_page_delete(fs, cur_pix); if (res == SPIFFS_OK) { spiffs_cb_object_event(fs, (spiffs_page_object_ix *)0, SPIFFS_EV_IX_DEL, obj_id, p_hdr.span_ix, cur_pix, 0); } } SPIFFS_CHECK_RES(res); } break; default: scan = 0; break; } // switch gc state cur_entry++; } // per entry obj_lookup_page++; // no need to check scan variable here, obj_lookup_page is set in start of loop } // per object lookup page if (res != SPIFFS_OK) break; // state finalization and switch switch (gc.state) { case FIND_OBJ_DATA: if (gc.obj_id_found) { // handle found data page - // find out corresponding obj ix page and load it to memory spiffs_page_header p_hdr; spiffs_page_ix objix_pix; gc.stored_scan_entry_index = cur_entry; // push cursor cur_entry = 0; // restart scan from start gc.state = MOVE_OBJ_DATA; res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr); SPIFFS_CHECK_RES(res); gc.cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, p_hdr.span_ix); SPIFFS_GC_DBG("gc_clean: FIND_DATA find objix span_ix:"_SPIPRIsp"\n", gc.cur_objix_spix); res = spiffs_obj_lu_find_id_and_span(fs, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_spix, 0, &objix_pix); if (res == SPIFFS_ERR_NOT_FOUND) { // on borked systems we might get an ERR_NOT_FOUND here - // this is handled by simply deleting the page as it is not referenced // from anywhere SPIFFS_GC_DBG("gc_clean: FIND_OBJ_DATA objix not found! Wipe page "_SPIPRIpg"\n", gc.cur_data_pix); res = spiffs_page_delete(fs, gc.cur_data_pix); SPIFFS_CHECK_RES(res); // then we restore states and continue scanning for data pages cur_entry = gc.stored_scan_entry_index; // pop cursor gc.state = FIND_OBJ_DATA; break; // done } SPIFFS_CHECK_RES(res); SPIFFS_GC_DBG("gc_clean: FIND_DATA found object index at page "_SPIPRIpg"\n", objix_pix); res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, SPIFFS_PAGE_TO_PADDR(fs, objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work); SPIFFS_CHECK_RES(res); // cannot allow a gc if the presumed index in fact is no index, a // check must run or lot of data may be lost SPIFFS_VALIDATE_OBJIX(objix->p_hdr, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_spix); gc.cur_objix_pix = objix_pix; } else { // no more data pages found, passed thru all block, start evacuating object indices gc.state = MOVE_OBJ_IX; cur_entry = 0; // restart entry scan index } break; case MOVE_OBJ_DATA: { // store modified objix (hdr) page residing in memory now that all // data pages belonging to this object index and residing in the block // we want to evacuate spiffs_page_ix new_objix_pix; gc.state = FIND_OBJ_DATA; cur_entry = gc.stored_scan_entry_index; // pop cursor if (gc.cur_objix_spix == 0) { // store object index header page res = spiffs_object_update_index_hdr(fs, 0, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_pix, fs->work, 0, 0, 0, &new_objix_pix); SPIFFS_GC_DBG("gc_clean: MOVE_DATA store modified objix_hdr page, "_SPIPRIpg":"_SPIPRIsp"\n", new_objix_pix, 0); SPIFFS_CHECK_RES(res); } else { // store object index page res = spiffs_page_move(fs, 0, fs->work, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, gc.cur_objix_pix, &new_objix_pix); SPIFFS_GC_DBG("gc_clean: MOVE_DATA store modified objix page, "_SPIPRIpg":"_SPIPRIsp"\n", new_objix_pix, objix->p_hdr.span_ix); SPIFFS_CHECK_RES(res); spiffs_cb_object_event(fs, (spiffs_page_object_ix *)fs->work, SPIFFS_EV_IX_UPD, gc.cur_obj_id, objix->p_hdr.span_ix, new_objix_pix, 0); } } break; case MOVE_OBJ_IX: // scanned thru all block, no more object indices found - our work here is done gc.state = FINISHED; break; default: cur_entry = 0; break; } // switch gc.state SPIFFS_GC_DBG("gc_clean: state-> "_SPIPRIi"\n", gc.state); } // while state != FINISHED return res; }