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spiffs_nucleus.c
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#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 "_SPIPRIad":"_SPIPRIi"\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
_SPIFFS_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 "_SPIPRIbl"\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) + 1;
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_IX_MAP
// update index map of given fd with given object index data
static void spiffs_update_ix_map(spiffs *fs,
spiffs_fd *fd, spiffs_span_ix objix_spix, spiffs_page_object_ix *objix) {
#if SPIFFS_SINGLETON
(void)fs;
#endif
spiffs_ix_map *map = fd->ix_map;
spiffs_span_ix map_objix_start_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, map->start_spix);
spiffs_span_ix map_objix_end_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, map->end_spix);
// check if updated ix is within map range
if (objix_spix < map_objix_start_spix || objix_spix > map_objix_end_spix) {
return;
}
// update memory mapped page index buffer to new pages
// get range of updated object index map data span indices
spiffs_span_ix objix_data_spix_start =
SPIFFS_DATA_SPAN_IX_FOR_OBJ_IX_SPAN_IX(fs, objix_spix);
spiffs_span_ix objix_data_spix_end = objix_data_spix_start +
(objix_spix == 0 ? SPIFFS_OBJ_HDR_IX_LEN(fs) : SPIFFS_OBJ_IX_LEN(fs));
// calc union of object index range and index map range array
spiffs_span_ix map_spix = MAX(map->start_spix, objix_data_spix_start);
spiffs_span_ix map_spix_end = MIN(map->end_spix + 1, objix_data_spix_end);
while (map_spix < map_spix_end) {
spiffs_page_ix objix_data_pix;
if (objix_spix == 0) {
// get data page from object index header page
objix_data_pix = ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix_header)))[map_spix];
} else {
// get data page from object index page
objix_data_pix = ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, map_spix)];
}
if (objix_data_pix == (spiffs_page_ix)-1) {
// reached end of object, abort
break;
}
map->map_buf[map_spix - map->start_spix] = objix_data_pix;
SPIFFS_DBG("map "_SPIPRIid":"_SPIPRIsp" ("_SPIPRIsp"--"_SPIPRIsp") objix.spix:"_SPIPRIsp" to pix "_SPIPRIpg"\n",
fd->obj_id, map_spix - map->start_spix,
map->start_spix, map->end_spix,
objix->p_hdr.span_ix,
objix_data_pix);
map_spix++;
}
}
typedef struct {
spiffs_fd *fd;
u32_t remaining_objix_pages_to_visit;
spiffs_span_ix map_objix_start_spix;
spiffs_span_ix map_objix_end_spix;
} spiffs_ix_map_populate_state;
static s32_t spiffs_populate_ix_map_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_const_p;
s32_t res;
spiffs_ix_map_populate_state *state = (spiffs_ix_map_populate_state *)user_var_p;
spiffs_page_ix pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, ix_entry);
// load header to check it
spiffs_page_object_ix *objix = (spiffs_page_object_ix *)fs->work;
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), (u8_t *)objix);
SPIFFS_CHECK_RES(res);
SPIFFS_VALIDATE_OBJIX(objix->p_hdr, obj_id, objix->p_hdr.span_ix);
// check if hdr is ok, and if objix range overlap with ix map range
if ((objix->p_hdr.flags & (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_IXDELE)) ==
(SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE) &&
objix->p_hdr.span_ix >= state->map_objix_start_spix &&
objix->p_hdr.span_ix <= state->map_objix_end_spix) {
// ok, load rest of object index
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),
SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_object_ix),
(u8_t *)objix + sizeof(spiffs_page_object_ix));
SPIFFS_CHECK_RES(res);
spiffs_update_ix_map(fs, state->fd, objix->p_hdr.span_ix, objix);
state->remaining_objix_pages_to_visit--;
SPIFFS_DBG("map "_SPIPRIid" ("_SPIPRIsp"--"_SPIPRIsp") remaining objix pages "_SPIPRIi"\n",
state->fd->obj_id,
state->fd->ix_map->start_spix, state->fd->ix_map->end_spix,
state->remaining_objix_pages_to_visit);
}
if (res == SPIFFS_OK) {
res = state->remaining_objix_pages_to_visit ? SPIFFS_VIS_COUNTINUE : SPIFFS_VIS_END;
}
return res;
}
// populates index map, from vector entry start to vector entry end, inclusive
s32_t spiffs_populate_ix_map(spiffs *fs, spiffs_fd *fd, u32_t vec_entry_start, u32_t vec_entry_end) {
s32_t res;
spiffs_ix_map *map = fd->ix_map;
spiffs_ix_map_populate_state state;
vec_entry_start = MIN((u32_t)(map->end_spix - map->start_spix), vec_entry_start);
vec_entry_end = MAX((u32_t)(map->end_spix - map->start_spix), vec_entry_end);
if (vec_entry_start > vec_entry_end) {
return SPIFFS_ERR_IX_MAP_BAD_RANGE;
}
state.map_objix_start_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, map->start_spix + vec_entry_start);
state.map_objix_end_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, map->start_spix + vec_entry_end);
state.remaining_objix_pages_to_visit =
state.map_objix_end_spix - state.map_objix_start_spix + 1;
state.fd = fd;
res = spiffs_obj_lu_find_entry_visitor(
fs,
SPIFFS_BLOCK_FOR_PAGE(fs, fd->objix_hdr_pix),
SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, fd->objix_hdr_pix),
SPIFFS_VIS_CHECK_ID,
fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG,
spiffs_populate_ix_map_v,
0,
&state,
0,
0);
if (res == SPIFFS_VIS_END) {
res = SPIFFS_OK;
}
return res;
}
#endif
#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;
// 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--;
#if SPIFFS_SECURE_ERASE
// Secure erase
unsigned char data[SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_header)];
bzero(data, sizeof(data));
res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_DELE,
0,
SPIFFS_PAGE_TO_PADDR(fs, pix) + sizeof(spiffs_page_header), sizeof(data), data);
SPIFFS_CHECK_RES(res);
#endif
// mark deleted in source page
u8_t flags = 0xff;
#if SPIFFS_NO_BLIND_WRITES
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, pix) + offsetof(spiffs_page_header, flags),
sizeof(flags), &flags);
SPIFFS_CHECK_RES(res);
#endif
flags &= ~(SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_USED);
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(flags), &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[],
const u8_t meta[],
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 @ "_SPIPRIpg" bix:"_SPIPRIbl" entry:"_SPIPRIsp"\n", (spiffs_page_ix)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, sizeof(oix_hdr.name) - 1);
((char*)oix_hdr.name)[sizeof(oix_hdr.name) - 1] = '\0';
#if SPIFFS_OBJ_META_LEN
if (meta) {
_SPIFFS_MEMCPY(oix_hdr.meta, meta, SPIFFS_OBJ_META_LEN);
} else {
memset(oix_hdr.meta, 0xff, SPIFFS_OBJ_META_LEN);
}
#else
(void) meta;
#endif
// 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, (spiffs_page_object_ix *)&oix_hdr,
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[],
const u8_t meta[],
u32_t size,
spiffs_page_ix *new_pix) {
s32_t res = SPIFFS_OK;