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[ox/fs] Fix various file system bugs

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This commit is contained in:
Gary Talent
2019-10-31 00:07:39 -05:00
parent fc337922ac
commit 7f5f74e2a6
5 changed files with 71 additions and 38 deletions
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56
deps/ox/src/ox/fs/filesystem/directory.hpp vendored
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@ -25,7 +25,7 @@ struct __attribute__((packed)) DirectoryEntry {
char name[MaxFileNameLength];
static constexpr std::size_t spaceNeeded(std::size_t chars) {
return offsetof(DirectoryEntryData, name) + chars;
return offsetof(DirectoryEntryData, name) + chars + 1;
}
};
@ -227,35 +227,33 @@ ox::Error Directory<FileStore, InodeId_t>::write(PathIterator path, InodeId_t in
// find existing version of directory
oxTrace("ox::fs::Directory::write") << "Searching for inode" << m_inodeId;
auto old = m_fs.read(m_inodeId);
if (old.valid()) {
const auto entrySize = DirectoryEntry<InodeId_t>::spaceNeeded(name->len());
const auto entryDataSize =DirectoryEntry<InodeId_t>::DirectoryEntryData::spaceNeeded(name->len());
const auto newSize = m_size + entrySize;
auto cpy = ox_malloca(newSize, Buffer, old);
if (cpy != nullptr) {
// TODO: look for old version of this entry and delete it
oxReturnError(cpy->setSize(newSize));
auto val = cpy->malloc(entryDataSize);
if (val.valid()) {
oxTrace("ox::fs::Directory::write") << "Attempting to write Directory entry:" << name->data();
oxTrace("ox::fs::Directory::write") << "Attempting to write Directory to FileStore";
oxReturnError(val->init(inode, name->data(), entrySize));
return m_fs.write(m_inodeId, cpy, cpy->size());
} else {
oxTrace("ox::fs::Directory::write::fail") << "Could not allocate memory for new directory entry";
return OxError(1);
}
} else {
oxTrace("ox::fs::Directory::write::fail") << "Could not allocate memory for copy of Directory";
return OxError(1);
}
} else {
if (!old.valid()) {
oxTrace("ox::fs::Directory::write::fail") << "Could not read existing version of Directory";
return OxError(1);
}
const auto entrySize = DirectoryEntry<InodeId_t>::spaceNeeded(name->len() + 1); // add 1 for \0
const auto entryDataSize = DirectoryEntry<InodeId_t>::DirectoryEntryData::spaceNeeded(name->len());
const auto newSize = Buffer::spaceNeeded(m_size + entrySize);
auto cpy = ox_malloca(newSize, Buffer, old);
if (cpy == nullptr) {
oxTrace("ox::fs::Directory::write::fail") << "Could not allocate memory for copy of Directory";
return OxError(1);
}
// TODO: look for old version of this entry and delete it
oxReturnError(cpy->setSize(newSize));
auto val = cpy->malloc(entryDataSize);
if (!val.valid()) {
oxTrace("ox::fs::Directory::write::fail") << "Could not allocate memory for new directory entry";
return OxError(1);
}
oxTrace("ox::fs::Directory::write") << "Attempting to write Directory entry:" << name->data();
oxTrace("ox::fs::Directory::write") << "Attempting to write Directory to FileStore";
oxReturnError(val->init(inode, name->data(), entrySize));
return m_fs.write(m_inodeId, cpy, cpy->size());
}
return OxError(1);
}
template<typename FileStore, typename InodeId_t>
@ -324,7 +322,7 @@ ValErr<typename FileStore::InodeId_t> Directory<FileStore, InodeId_t>::findEntry
auto data = i->data();
if (data.valid()) {
oxTrace("ox::fs::Directory::findEntry").del("") << "Comparing \"" << name.c_str() << "\" to \"" << data->name << "\"";
if (ox_strncmp(data->name, name.c_str(), name.len()) == 0) {
if (ox_strncmp(data->name, name.c_str(), MaxFileNameLength) == 0) { // <-- TODO: bad compare
oxTrace("ox::fs::Directory::findEntry").del("") << "\"" << name.c_str() << "\" match found.";
return static_cast<InodeId_t>(data->inode);
}
@ -345,9 +343,7 @@ ValErr<typename FileStore::InodeId_t> Directory<FileStore, InodeId_t>::find(Path
// determine if already exists
auto name = nameBuff;
if (path.get(name)) {
return {0, OxError(1)};
}
oxReturnError(path.get(name));
auto v = findEntry(name->c_str());
if (!v.error) {