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mufs: add mufs_extend_tree() to extend the depth of a file tree

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This commit is contained in:
S.J.R. van Schaik 2017-05-29 14:41:47 +02:00
parent c5c24788c8
commit 281c1abdfa
2 changed files with 22 additions and 0 deletions
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21
source/fs/mufs/tree.c
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@ -95,3 +95,24 @@ void mufs_free_page(struct mufs *fs, struct mufs_tree *tree, uint32_t va)
{
mufs_do_free_page(fs, tree->root, tree->depth, va);
}
int mufs_extend_tree(struct mufs *fs, struct mufs_tree *tree, uint8_t depth)
{
uint32_t root;
for (; tree->depth < depth; ++tree->depth) {
if (mufs_alloc_block(fs, &root) < 0)
return -1;
if (!root)
continue;
if (flash_write(fs->dev, root << fs->dev->log2_block_size, &tree->root,
sizeof tree->root) == 0) {
mufs_free_block(fs, root);
return -1;
}
}
return 0;
}

1
source/fs/mufs/tree.h
View file

@ -5,3 +5,4 @@ int mufs_lookup_page(struct mufs *fs, struct mufs_tree *tree, uint32_t *page,
int mufs_alloc_page(struct mufs *fs, struct mufs_tree *tree, uint32_t *page,
uint32_t va);
void mufs_free_page(struct mufs *fs, struct mufs_tree *tree, uint32_t va);
int mufs_extend_tree(struct mufs *fs, struct mufs_tree *tree, uint8_t depth);