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nodemcu-firmware/components/spiffs/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;
}
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;
}
#if !SPIFFS_CACHE
s32_t spiffs_phys_rd(
spiffs *fs,
u32_t addr,
u32_t len,
u8_t *dst) {
return fs->cfg.hal_read_f(addr, len, dst);
}
s32_t spiffs_phys_wr(
spiffs *fs,
u32_t addr,
u32_t len,
u8_t *src) {
return fs->cfg.hal_write_f(addr, len, src);
}
#endif
s32_t spiffs_phys_cpy(
spiffs *fs,
spiffs_file fh,
u32_t dst,
u32_t src,
u32_t len) {
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;
}
// 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_data any data, passed to the callback visitor function
// @param user_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,
u32_t user_data,
void *user_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_data,
user_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;
}
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));
(void)fs->cfg.hal_erase_f(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);
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;
}
static s32_t spiffs_obj_lu_scan_v(
spiffs *fs,
spiffs_obj_id obj_id,
spiffs_block_ix bix,
int ix_entry,
u32_t user_data,
void *user_p) {
(void)bix;
(void)user_data;
(void)user_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)) {
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);
res = spiffs_erase_block(fs, unerased_bix);
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;
}
// 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_VIS_END) {
SPIFFS_DBG("fs full\n");
}
return res == SPIFFS_VIS_END ? SPIFFS_ERR_FULL : res;
}
// 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,
u32_t user_data,
void *user_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_data &&
(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_p == 0 || *((spiffs_page_ix *)user_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,
(u32_t)spix,
exclusion_pix ? &exclusion_pix : 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;
}
// 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,
(u32_t)spix,
exclusion_pix ? &exclusion_pix : 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;
}
// 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;
}
// 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;
}
// 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;
}
// Create an object index header page with empty index and undefined length
s32_t spiffs_object_create(
spiffs *fs,
spiffs_obj_id obj_id,
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, (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;
}
// 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,
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, (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;
}
void spiffs_cb_object_event(
spiffs *fs,
spiffs_fd *fd,
int ev,
spiffs_obj_id obj_id,
spiffs_span_ix spix,
spiffs_page_ix new_pix,
u32_t new_size) {
(void)fd;
// update index caches in all file descriptors
obj_id &= ~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;
}
}
}
}
// 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;
}
// 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;
}
// 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;
}
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,
u32_t user_data,
void *user_p) {
(void)user_data;
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 (strncmp((char *)user_p, (char *)objix_hdr.name, SPIFFS_OBJ_NAME_LEN) == 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,
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,
0,
name,
&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;
}
// 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;
res = spiffs_gc_check(fs, remove ? 0 : SPIFFS_DATA_PAGE_SIZE(fs));
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
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 (cur_size - SPIFFS_DATA_PAGE_SIZE(fs) >= new_size) {
// 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;
}
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;
}
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,
u32_t user_data, void *user_p) {
if (id != SPIFFS_OBJ_ID_FREE && id != SPIFFS_OBJ_ID_DELETED) {
spiffs_obj_id min_obj_id = user_data;
u8_t *conflicting_name = (u8_t *)user_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 (strncmp((char *)user_p, (char *)objix_hdr.name, SPIFFS_OBJ_NAME_LEN) == 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<<bit_ix);
}
}
return SPIFFS_VIS_COUNTINUE;
}
static s32_t spiffs_obj_lu_find_free_obj_id_compact_v(spiffs *fs, spiffs_obj_id id, spiffs_block_ix bix, int ix_entry,
u32_t user_data, void *user_p) {
(void)user_data;
if (id != SPIFFS_OBJ_ID_FREE && id != SPIFFS_OBJ_ID_DELETED && (id & SPIFFS_OBJ_ID_IX_FLAG)) {
s32_t res;
spiffs_free_obj_id_state *state = (spiffs_free_obj_id_state *)user_p;
spiffs_page_object_ix_header objix_hdr;
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_OBJ_LOOKUP_ENTRY_TO_PADDR(fs, bix, ix_entry), sizeof(spiffs_page_object_ix_header), (u8_t*)&objix_hdr);
if (res == SPIFFS_OK && objix_hdr.p_hdr.span_ix == 0 &&
((objix_hdr.p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET)) ==
(SPIFFS_PH_FLAG_DELET))) {
// ok object look up entry
if (state->conflicting_name && strncmp((const char *)state->conflicting_name, (char *)objix_hdr.name, SPIFFS_OBJ_NAME_LEN) == 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 bitmasked is searched for a free id
s32_t spiffs_obj_lu_find_free_obj_id(spiffs *fs, spiffs_obj_id *obj_id, u8_t *conflicting_name) {
s32_t res = SPIFFS_OK;
u32_t max_objects = (SPIFFS_CFG_PHYS_SZ(fs) / (u32_t)SPIFFS_CFG_LOG_PAGE_SZ(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, state.min_obj_id,
conflicting_name, 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<<j)) == 0) {
*obj_id = (i<<3)+j+state.min_obj_id;
return SPIFFS_OK;
}
}
}
return SPIFFS_ERR_FULL;
} else {
// not possible to represent all ids in range in a bitmap, compact and count
if (state.compaction != 0) {
// select element in compacted table, decrease range and recompact
u32_t i, min_i = 0;
u8_t *map = (u8_t *)fs->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, 0, &state, 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;
}
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;
}
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