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WIP Added allocation randomization for dynamic wear-leveling

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Christopher Haster
2018-08-09 09:06:17 -05:00
parent 67bbee56f5
commit 24eaf86b0e
10 changed files with 250 additions and 59 deletions
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15
lfs.c
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@@ -879,6 +879,8 @@ static int32_t lfs_dir_fetchmatch(lfs_t *lfs,
dir->tail[1] = temptail[1];
dir->split = tempsplit;
dir->locals = templocals;
lfs->seed ^= crc;
crc = 0xffffffff;
} else {
err = lfs_bd_crc32(lfs, dir->pair[0],
@@ -2874,6 +2876,7 @@ static int lfs_init(lfs_t *lfs, const struct lfs_config *cfg) {
lfs->root[0] = 0xffffffff;
lfs->root[1] = 0xffffffff;
lfs->mlist = NULL;
lfs->seed = 0;
lfs->globals.s.movepair[0] = 0xffffffff;
lfs->globals.s.movepair[1] = 0xffffffff;
lfs->globals.s.moveid = 0x3ff;
@@ -2962,12 +2965,6 @@ int lfs_mount(lfs_t *lfs, const struct lfs_config *cfg) {
return err;
}
// setup free lookahead
lfs->free.off = 0;
lfs->free.size = 0;
lfs->free.i = 0;
lfs_alloc_ack(lfs);
// load superblock
lfs_mdir_t root;
err = lfs_dir_fetch(lfs, &root, (const lfs_block_t[2]){0, 1});
@@ -3065,6 +3062,12 @@ int lfs_mount(lfs_t *lfs, const struct lfs_config *cfg) {
lfs->globals.s.moveid);
}
// setup free lookahead
lfs->free.off = lfs->seed % lfs->cfg->block_size;
lfs->free.size = 0;
lfs->free.i = 0;
lfs_alloc_ack(lfs);
return 0;
cleanup: