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Ext2FS: Don't allocate blocks until we're committed to a new inode

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Otherwise we would leak the blocks in case we returned earlier than
expected. :^)
This commit is contained in:
Andreas Kling
2019-09-22 18:50:24 +02:00
parent bd7c38e7b6
commit e364846622
1 changed files with 3 additions and 7 deletions
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10
Kernel/FileSystem/Ext2FileSystem.cpp
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@@ -1204,13 +1204,6 @@ RefPtr<Inode> Ext2FS::create_inode(InodeIdentifier parent_id, const String& name
return {};
}
auto blocks = allocate_blocks(group_index_from_inode(inode_id), needed_blocks);
if (blocks.size() != needed_blocks) {
kprintf("Ext2FS: create_inode: allocate_blocks failed\n");
error = -ENOSPC;
return {};
}
// Try adding it to the directory first, in case the name is already in use.
auto result = parent_inode->add_child({ fsid(), inode_id }, name, mode);
if (result.is_error()) {
@@ -1218,6 +1211,9 @@ RefPtr<Inode> Ext2FS::create_inode(InodeIdentifier parent_id, const String& name
return {};
}
auto blocks = allocate_blocks(group_index_from_inode(inode_id), needed_blocks);
ASSERT(blocks.size() == needed_blocks);
// Looks like we're good, time to update the inode bitmap and group+global inode counters.
bool success = set_inode_allocation_state(inode_id, true);
ASSERT(success);