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Kernel: Move DevFS APIs towards OOM safety

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Brian Gianforcaro 2021-05-28 05:40:22 -07:00 • committed by Linus Groh
parent d2d6ab40f9
commit 8f9872581b
1 changed files with 11 additions and 7 deletions
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18
Kernel/FileSystem/DevFS.cpp
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@ -275,13 +275,15 @@ KResultOr<NonnullRefPtr<Inode>> DevFSRootDirectoryInode::create_child(const Stri
}
if (name != "pts")
return EROFS;
auto new_directory_inode = adopt_ref(*new DevFSPtsDirectoryInode(m_parent_fs));
auto new_directory_inode = adopt_ref_if_nonnull(new DevFSPtsDirectoryInode(m_parent_fs));
if (!new_directory_inode)
return ENOMEM;
if (!m_subfolders.try_ensure_capacity(m_subfolders.size() + 1))
return ENOMEM;
if (!m_parent_fs.m_nodes.try_ensure_capacity(m_parent_fs.m_nodes.size() + 1))
return ENOMEM;
m_subfolders.append(new_directory_inode);
m_parent_fs.m_nodes.append(new_directory_inode);
m_subfolders.append(*new_directory_inode);
m_parent_fs.m_nodes.append(*new_directory_inode);
return KResult(KSuccess);
}
if (metadata.is_symlink()) {
@ -289,14 +291,16 @@ KResultOr<NonnullRefPtr<Inode>> DevFSRootDirectoryInode::create_child(const Stri
if (link.name() == name)
return EEXIST;
}
auto new_link_inode = adopt_ref(*new DevFSLinkInode(m_parent_fs, name));
auto new_link_inode = adopt_ref_if_nonnull(new DevFSLinkInode(m_parent_fs, name));
if (!new_link_inode)
return ENOMEM;
if (!m_links.try_ensure_capacity(m_links.size() + 1))
return ENOMEM;
if (!m_parent_fs.m_nodes.try_ensure_capacity(m_parent_fs.m_nodes.size() + 1))
return ENOMEM;
m_links.append(new_link_inode);
m_parent_fs.m_nodes.append(new_link_inode);
return new_link_inode;
m_links.append(*new_link_inode);
m_parent_fs.m_nodes.append(*new_link_inode);
return new_link_inode.release_nonnull();
}
return EROFS;
}