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Merge pull request #802 from littlefs-project/assert-minimum-block-size

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Add explicit assert for minimum block size of 128 bytes
This commit is contained in:
Christopher Haster
2023-04-26 02:41:44 -05:00
committed by GitHub
parent 50b394ca36 b0a4a44e5b
commit 92298c749d
1 changed files with 4 additions and 1 deletions
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lfs.c
+4 -1
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@@ -4040,7 +4040,10 @@ static int lfs_init(lfs_t *lfs, const struct lfs_config *cfg) {
LFS_ASSERT(lfs->cfg->cache_size % lfs->cfg->prog_size == 0);
LFS_ASSERT(lfs->cfg->block_size % lfs->cfg->cache_size == 0);
// check that the block size is large enough to fit ctz pointers
// check that the block size is large enough to fit all ctz pointers
LFS_ASSERT(lfs->cfg->block_size >= 128);
// this is the exact calculation for all ctz pointers, if this fails
// and the simpler assert above does not, math must be broken
LFS_ASSERT(4*lfs_npw2(0xffffffff / (lfs->cfg->block_size-2*4))
<= lfs->cfg->block_size);