static int fs_format(int cidx) {
s32_t r;
struct mount_info *m = &s_fsm;
_u32 fsc_size = FS_CONTAINER_SIZE(FS_SIZE);
dprintf(("formatting %d s=%u, cs=%d\n", cidx, FS_SIZE, (int) fsc_size));
m->cidx = cidx;
r = fs_create_container(cidx, FS_SIZE);
if (r < 0) goto out;
m->fh = r;
m->valid = m->rw = m->formatting = 1;
/* Touch a byte at the end to open a "hole". */
r = sl_FsWrite(m->fh, fsc_size - 1, (_u8 *) "\xff", 1);
dprintf(("write 1 @ %d %d\n", (int) (fsc_size - 1), (int) r));
if (r != 1) goto out_close;
/* There must be a mount attempt before format. It'll fail and that's ok. */
r = fs_mount_spiffs(m, FS_SIZE, FS_BLOCK_SIZE, FS_PAGE_SIZE);
dprintf(("mount: %d\n", (int) r));
r = SPIFFS_format(&m->fs);
dprintf(("format: %d\n", (int) r));
if (r != SPIFFS_OK) goto out_close;
m->seq = INITIAL_SEQ;
r = fs_write_meta(m);
out_close:
sl_FsClose(m->fh, NULL, NULL, 0);
out:
m->fh = -1;
m->valid = m->formatting = m->rw = 0;
return r;
}
static _i32 fs_switch_container(struct mount_info *m, _u32 mask_begin,
_u32 mask_len) {
int r;
int new_cidx = m->cidx ^ 1;
_i32 old_fh = m->fh, new_fh;
_u8 *buf;
_u32 offset, len, buf_size;
LOG(LL_DEBUG, ("%s %d -> %d", m->cpfx, m->cidx, new_cidx));
if (old_fh > 0 && m->rw) {
/*
* During the switch the destination container will be unusable.
* If switching from a writeable container (likely in response to an erase),
* close the old container first to make it safe and reopen for reading.
*/
fs_close_container(m);
old_fh = -1;
}
if (old_fh < 0) {
_u8 fname[MAX_FS_CONTAINER_FNAME_LEN];
fs_container_fname(m->cpfx, m->cidx, fname);
r = sl_FsOpen(fname, FS_MODE_OPEN_READ, NULL, &old_fh);
DBG(("fopen %s %d", m->cpfx, r));
if (r < 0) {
r = SPIFFS_ERR_NOT_READABLE;
goto out_close_old;
}
}
miot_wdt_feed();
new_fh = fs_create_container(m->cpfx, new_cidx, m->fs.cfg.phys_size);
if (new_fh < 0) {
r = new_fh;
goto out_close_old;
}
buf_size = 1024;
buf = get_buf(&buf_size);
if (buf == NULL) {
r = SPIFFS_ERR_INTERNAL;
goto out_close_new;
}
for (offset = 0; offset < m->fs.cfg.phys_size;) {
len = buf_size;
if (offset == mask_begin) {
offset = mask_begin + mask_len;
} else if (offset + len > mask_begin && offset < mask_begin + mask_len) {
len = mask_begin - offset;
}
if (offset + len > m->fs.cfg.phys_size) {
len = m->fs.cfg.phys_size - offset;
}
DBG(("copy %d @ %d", (int) len, (int) offset));
if (len > 0) {
r = sl_FsRead(old_fh, offset, buf, len);
if (r != len) {
r = SPIFFS_ERR_NOT_READABLE;
goto out_free;
}
r = sl_FsWrite(new_fh, offset, buf, len);
if (r != len) {
r = SPIFFS_ERR_NOT_WRITABLE;
goto out_free;
}
offset += len;
}
}
m->seq--;
m->cidx = new_cidx;
m->fh = new_fh;
new_fh = -1;
m->rw = 1;
r = fs_write_mount_meta(m);
m->last_write = mg_time();
out_free:
free(buf);
out_close_new:
if (new_fh > 0) sl_FsClose(new_fh, NULL, NULL, 0);
out_close_old:
sl_FsClose(old_fh, NULL, NULL, 0);
LOG((r == 0 ? LL_DEBUG : LL_ERROR), ("%d", r));
return r;
}
static _i32 fs_switch_container(struct mount_info *m, _u32 mask_begin,
_u32 mask_len) {
int r;
int new_cidx = m->cidx ^ 1;
_i32 old_fh = m->fh, new_fh;
_u8 *buf;
_u32 offset, len, buf_size;
dprintf(("switch %d -> %d\n", m->cidx, new_cidx));
if (old_fh < 0) {
r = sl_FsOpen(container_fname(m->cidx), FS_MODE_OPEN_READ, NULL, &old_fh);
dprintf(("fopen %d\n", r));
if (r < 0) {
r = SPIFFS_ERR_NOT_READABLE;
goto out_close_old;
}
}
new_fh = fs_create_container(new_cidx, m->fs.cfg.phys_size);
if (new_fh < 0) {
r = new_fh;
goto out_close_old;
}
buf_size = 8192;
buf = get_buf(&buf_size);
if (buf == NULL) {
r = SPIFFS_ERR_INTERNAL;
goto out_close_new;
}
for (offset = 0; offset < m->fs.cfg.phys_size;) {
len = buf_size;
if (offset == mask_begin) {
offset = mask_begin + mask_len;
} else if (offset + len > mask_begin && offset < mask_begin + mask_len) {
len = mask_begin - offset;
}
if (offset + len > m->fs.cfg.phys_size) {
len = m->fs.cfg.phys_size - offset;
}
dprintf(("copy %d @ %d\n", (int) len, (int) offset));
if (len > 0) {
r = sl_FsRead(old_fh, offset, buf, len);
if (r != len) {
r = SPIFFS_ERR_NOT_READABLE;
goto out_free;
}
r = sl_FsWrite(new_fh, offset, buf, len);
if (r != len) {
r = SPIFFS_ERR_NOT_WRITABLE;
goto out_free;
}
offset += len;
}
}
m->seq--;
m->cidx = new_cidx;
m->fh = new_fh;
new_fh = -1;
m->rw = 1;
r = fs_write_meta(m);
out_free:
free(buf);
out_close_new:
if (new_fh > 0) sl_FsClose(new_fh, NULL, NULL, 0);
out_close_old:
sl_FsClose(old_fh, NULL, NULL, 0);
dprintf(("switch: %d\n", r));
return r;
}
