blob: f87add2d2a757fa6e33ac8ec86f4a46b2cc2bc73 [file] [log] [blame]
// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <lib/fdio/vfs.h>
#include <lib/vfs/cpp/internal/dirent_filler.h>
#include <lib/vfs/cpp/lazy_dir.h>
#include <algorithm>
namespace vfs {
bool LazyDir::LazyEntry::operator<(const LazyDir::LazyEntry& rhs) const { return id < rhs.id; }
LazyDir::LazyDir() {}
LazyDir::~LazyDir() = default;
zx_status_t LazyDir::GetAttr(fuchsia::io::NodeAttributes* out_attributes) const {
out_attributes->mode = fuchsia::io::MODE_TYPE_DIRECTORY | V_IRUSR;
out_attributes->id = fuchsia::io::INO_UNKNOWN;
out_attributes->content_size = 0;
out_attributes->storage_size = 0;
out_attributes->link_count = 1;
out_attributes->creation_time = 0;
out_attributes->modification_time = 0;
return ZX_OK;
}
zx_status_t LazyDir::Lookup(const std::string& name, Node** out_node) const {
LazyEntryVector entries;
GetContents(&entries);
for (const auto& entry : entries) {
if (name == entry.name) {
return GetFile(out_node, entry.id, entry.name);
}
}
return ZX_ERR_NOT_FOUND;
}
zx_status_t LazyDir::Readdir(uint64_t offset, void* data, uint64_t len, uint64_t* out_offset,
uint64_t* out_actual) {
LazyEntryVector entries;
GetContents(&entries);
std::sort(entries.begin(), entries.end());
vfs::internal::DirentFiller filler(data, len);
const uint64_t ino = fuchsia::io::INO_UNKNOWN;
if (offset < kDotId) {
if (filler.Next(".", 1, fuchsia::io::DIRENT_TYPE_DIRECTORY, ino) != ZX_OK) {
*out_actual = filler.GetBytesFilled();
return ZX_ERR_INVALID_ARGS; // out_actual would be 0
}
offset++;
*out_offset = kDotId;
}
for (auto it = std::upper_bound(entries.begin(), entries.end(), offset,
[](uint64_t b_id, const LazyEntry&a) { return b_id < a.id; });
it != entries.end(); ++it) {
auto dtype = ((fuchsia::io::MODE_TYPE_MASK & it->type) >> 12);
if (filler.Next(it->name, dtype, ino) != ZX_OK) {
*out_actual = filler.GetBytesFilled();
if (*out_actual == 0) {
// no space to fill even 1 dentry
return ZX_ERR_INVALID_ARGS;
}
return ZX_OK;
}
*out_offset = it->id;
}
*out_actual = filler.GetBytesFilled();
return ZX_OK;
}
uint64_t LazyDir::GetStartingId() const { return kDotId + 1; }
} // namespace vfs