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(chore) updates from PR, we decided not to move forward with changing v1 code since it can be risky. Let's improve the future! Also renamed and moved around a the lookahead free / reset function

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This commit is contained in:
Derek Thrasher
2020-03-26 08:47:12 -04:00
committed by Christopher Haster
parent d498b9fb31
commit 5e5b5d8572
1 changed files with 15 additions and 17 deletions
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32
lfs.c
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@@ -26,15 +26,6 @@ static inline void lfs_cache_zero(lfs_t *lfs, lfs_cache_t *pcache) {
pcache->block = LFS_BLOCK_NULL;
}
/// Invalidate the lookahead buffer. This is done during mounting and failed traversals ///
static inline void lfs_setup_invalid_lookahead_buffer(lfs_t *lfs)
{
lfs->free.off = lfs->seed % lfs->cfg->block_size;
lfs->free.size = 0;
lfs->free.i = 0;
lfs_alloc_ack(lfs);
}
static int lfs_bd_read(lfs_t *lfs,
const lfs_cache_t *pcache, lfs_cache_t *rcache, lfs_size_t hint,
lfs_block_t block, lfs_off_t off,
@@ -448,6 +439,19 @@ static int lfs_alloc_lookahead(void *p, lfs_block_t block) {
return 0;
}
static void lfs_alloc_ack(lfs_t *lfs) {
lfs->free.ack = lfs->cfg->block_count;
}
/// Invalidate the lookahead buffer. This is done during mounting and failed traversals ///
static void lfs_alloc_reset(lfs_t *lfs)
{
lfs->free.off = lfs->seed % lfs->cfg->block_size;
lfs->free.size = 0;
lfs->free.i = 0;
lfs_alloc_ack(lfs);
}
static int lfs_alloc(lfs_t *lfs, lfs_block_t *block) {
while (true) {
while (lfs->free.i != lfs->free.size) {
@@ -488,17 +492,12 @@ static int lfs_alloc(lfs_t *lfs, lfs_block_t *block) {
memset(lfs->free.buffer, 0, lfs->cfg->lookahead_size);
int err = lfs_fs_traverseraw(lfs, lfs_alloc_lookahead, lfs, true);
if (err) {
lfs_setup_invalid_lookahead_buffer(lfs);
lfs_alloc_reset(lfs);
return err;
}
}
}
static void lfs_alloc_ack(lfs_t *lfs) {
lfs->free.ack = lfs->cfg->block_count;
}
/// Metadata pair and directory operations ///
static lfs_stag_t lfs_dir_getslice(lfs_t *lfs, const lfs_mdir_t *dir,
lfs_tag_t gmask, lfs_tag_t gtag,
@@ -3784,7 +3783,7 @@ int lfs_mount(lfs_t *lfs, const struct lfs_config *cfg) {
lfs->gdisk = lfs->gstate;
// setup free lookahead
lfs_setup_invalid_lookahead_buffer(lfs);
lfs_alloc_reset(lfs);
LFS_TRACE("lfs_mount -> %d", 0);
return 0;
@@ -4603,7 +4602,6 @@ static int lfs1_mount(lfs_t *lfs, struct lfs1 *lfs1,
lfs->lfs1->root[1] = LFS_BLOCK_NULL;
// setup free lookahead
// TODO should this also call lfs_setup_invalid_lookahead_buffer(lfs); the free.off is different in the current version of lfs
lfs->free.off = 0;
lfs->free.size = 0;
lfs->free.i = 0;