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https://github.com/RGBCube/serenity
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ProcFS: Port JSON generation to streaming serializers
This way we don't allocate giant JSON objects on the kernel heap first. Hopefully fixes https://github.com/SerenityOS/serenity/issues/484
This commit is contained in:
Sergey Bugaev
Andreas Kling
parent
216b7b3b80
commit
8ea25ca3b0
1 changed files with 155 additions and 144 deletions
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@ -4,8 +4,9 @@
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#include "Process.h"
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#include "Scheduler.h"
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#include "StdLib.h"
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#include <AK/JsonArray.h>
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#include <AK/JsonArraySerializer.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonObjectSerializer.h>
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#include <AK/JsonValue.h>
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#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/FileSystem/Custody.h>
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@ -201,20 +202,22 @@ Optional<KBuffer> procfs$pid_fds(InodeIdentifier identifier)
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auto& process = handle->process();
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if (process.number_of_open_file_descriptors() == 0)
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return {};
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JsonArray array;
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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for (int i = 0; i < process.max_open_file_descriptors(); ++i) {
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auto* description = process.file_description(i);
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if (!description)
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continue;
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JsonObject description_object;
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description_object.set("fd", i);
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description_object.set("absolute_path", description->absolute_path());
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description_object.set("seekable", description->file().is_seekable());
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description_object.set("class", description->file().class_name());
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description_object.set("offset", description->offset());
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array.append(move(description_object));
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JsonObjectSerializer description_object = array.add_object();
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description_object.add("fd", i);
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description_object.add("absolute_path", description->absolute_path());
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description_object.add("seekable", description->file().is_seekable());
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description_object.add("class", description->file().class_name());
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description_object.add("offset", description->offset());
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}
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return array.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$pid_fd_entry(InodeIdentifier identifier)
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@ -236,59 +239,61 @@ Optional<KBuffer> procfs$pid_vm(InodeIdentifier identifier)
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if (!handle)
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return {};
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auto& process = handle->process();
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JsonArray array;
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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for (auto& region : process.regions()) {
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JsonObject region_object;
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region_object.set("readable", region.is_readable());
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region_object.set("writable", region.is_writable());
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region_object.set("address", region.vaddr().get());
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region_object.set("size", region.size());
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region_object.set("amount_resident", region.amount_resident());
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region_object.set("name", region.name());
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array.append(move(region_object));
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JsonObjectSerializer region_object = array.add_object();
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region_object.add("readable", region.is_readable());
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region_object.add("writable", region.is_writable());
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region_object.add("address", region.vaddr().get());
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region_object.add("size", region.size());
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region_object.add("amount_resident", region.amount_resident());
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region_object.add("name", region.name());
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}
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return array.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$pci(InodeIdentifier)
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{
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JsonArray json;
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PCI::enumerate_all([&json](PCI::Address address, PCI::ID id) {
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JsonObject obj;
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obj.set("bus", address.bus());
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obj.set("slot", address.slot());
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obj.set("function", address.function());
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obj.set("vendor_id", id.vendor_id);
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obj.set("device_id", id.device_id);
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obj.set("revision_id", PCI::get_revision_id(address));
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obj.set("subclass", PCI::get_subclass(address));
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obj.set("class", PCI::get_class(address));
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obj.set("subsystem_id", PCI::get_subsystem_id(address));
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obj.set("subsystem_vendor_id", PCI::get_subsystem_vendor_id(address));
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json.append(move(obj));
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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PCI::enumerate_all([&array](PCI::Address address, PCI::ID id) {
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JsonObjectSerializer obj = array.add_object();
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obj.add("bus", address.bus());
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obj.add("slot", address.slot());
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obj.add("function", address.function());
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obj.add("vendor_id", id.vendor_id);
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obj.add("device_id", id.device_id);
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obj.add("revision_id", PCI::get_revision_id(address));
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obj.add("subclass", PCI::get_subclass(address));
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obj.add("class", PCI::get_class(address));
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obj.add("subsystem_id", PCI::get_subsystem_id(address));
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obj.add("subsystem_vendor_id", PCI::get_subsystem_vendor_id(address));
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$devices(InodeIdentifier)
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{
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JsonArray json;
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Device::for_each([&json](auto& device) {
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JsonObject obj;
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obj.set("major", device.major());
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obj.set("minor", device.minor());
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obj.set("class_name", device.class_name());
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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Device::for_each([&array](auto& device) {
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JsonObjectSerializer obj = array.add_object();
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obj.add("major", device.major());
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obj.add("minor", device.minor());
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obj.add("class_name", device.class_name());
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if (device.is_block_device())
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obj.set("type", "block");
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obj.add("type", "block");
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else if (device.is_character_device())
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obj.set("type", "character");
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obj.add("type", "character");
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else
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ASSERT_NOT_REACHED();
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json.append(move(obj));
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$uptime(InodeIdentifier)
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@ -307,69 +312,73 @@ Optional<KBuffer> procfs$cmdline(InodeIdentifier)
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Optional<KBuffer> procfs$net_adapters(InodeIdentifier)
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{
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JsonArray json;
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NetworkAdapter::for_each([&json](auto& adapter) {
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JsonObject obj;
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obj.set("name", adapter.name());
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obj.set("class_name", adapter.class_name());
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obj.set("mac_address", adapter.mac_address().to_string());
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obj.set("ipv4_address", adapter.ipv4_address().to_string());
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obj.set("packets_in", adapter.packets_in());
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obj.set("bytes_in", adapter.bytes_in());
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obj.set("packets_out", adapter.packets_out());
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obj.set("bytes_out", adapter.bytes_out());
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obj.set("link_up", adapter.link_up());
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json.append(obj);
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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NetworkAdapter::for_each([&array](auto& adapter) {
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JsonObjectSerializer obj = array.add_object();
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obj.add("name", adapter.name());
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obj.add("class_name", adapter.class_name());
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obj.add("mac_address", adapter.mac_address().to_string());
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obj.add("ipv4_address", adapter.ipv4_address().to_string());
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obj.add("packets_in", adapter.packets_in());
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obj.add("bytes_in", adapter.bytes_in());
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obj.add("packets_out", adapter.packets_out());
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obj.add("bytes_out", adapter.bytes_out());
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obj.add("link_up", adapter.link_up());
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$net_tcp(InodeIdentifier)
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{
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JsonArray json;
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TCPSocket::for_each([&json](auto& socket) {
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JsonObject obj;
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obj.set("local_address", socket.local_address().to_string());
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obj.set("local_port", socket.local_port());
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obj.set("peer_address", socket.peer_address().to_string());
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obj.set("peer_port", socket.peer_port());
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obj.set("state", TCPSocket::to_string(socket.state()));
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obj.set("ack_number", socket.ack_number());
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obj.set("sequence_number", socket.sequence_number());
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obj.set("packets_in", socket.packets_in());
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obj.set("bytes_in", socket.bytes_in());
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obj.set("packets_out", socket.packets_out());
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obj.set("bytes_out", socket.bytes_out());
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json.append(obj);
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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TCPSocket::for_each([&array](auto& socket) {
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JsonObjectSerializer obj = array.add_object();
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obj.add("local_address", socket.local_address().to_string());
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obj.add("local_port", socket.local_port());
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obj.add("peer_address", socket.peer_address().to_string());
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obj.add("peer_port", socket.peer_port());
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obj.add("state", TCPSocket::to_string(socket.state()));
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obj.add("ack_number", socket.ack_number());
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obj.add("sequence_number", socket.sequence_number());
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obj.add("packets_in", socket.packets_in());
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obj.add("bytes_in", socket.bytes_in());
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obj.add("packets_out", socket.packets_out());
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obj.add("bytes_out", socket.bytes_out());
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$net_udp(InodeIdentifier)
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{
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JsonArray json;
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UDPSocket::for_each([&json](auto& socket) {
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JsonObject obj;
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obj.set("local_address", socket.local_address().to_string());
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obj.set("local_port", socket.local_port());
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obj.set("peer_address", socket.peer_address().to_string());
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obj.set("peer_port", socket.peer_port());
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json.append(obj);
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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UDPSocket::for_each([&array](auto& socket) {
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JsonObjectSerializer obj = array.add_object();
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obj.add("local_address", socket.local_address().to_string());
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obj.add("local_port", socket.local_port());
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obj.add("peer_address", socket.peer_address().to_string());
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obj.add("peer_port", socket.peer_port());
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$net_local(InodeIdentifier)
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{
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JsonArray json;
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LocalSocket::for_each([&json](auto& socket) {
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JsonObject obj;
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obj.set("path", String(socket.socket_path()));
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obj.set("origin_pid", socket.origin_pid());
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obj.set("acceptor_pid", socket.acceptor_pid());
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json.append(obj);
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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LocalSocket::for_each([&array](auto& socket) {
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JsonObjectSerializer obj = array.add_object();
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obj.add("path", String(socket.socket_path()));
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obj.add("origin_pid", socket.origin_pid());
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obj.add("acceptor_pid", socket.acceptor_pid());
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$pid_vmo(InodeIdentifier identifier)
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@ -514,27 +523,27 @@ Optional<KBuffer> procfs$mounts(InodeIdentifier)
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Optional<KBuffer> procfs$df(InodeIdentifier)
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{
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// FIXME: This is obviously racy against the VFS mounts changing.
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JsonArray json;
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VFS::the().for_each_mount([&json](auto& mount) {
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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VFS::the().for_each_mount([&array](auto& mount) {
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auto& fs = mount.guest_fs();
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JsonObject fs_object;
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fs_object.set("class_name", fs.class_name());
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fs_object.set("total_block_count", fs.total_block_count());
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fs_object.set("free_block_count", fs.free_block_count());
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fs_object.set("total_inode_count", fs.total_inode_count());
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fs_object.set("free_inode_count", fs.free_inode_count());
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fs_object.set("mount_point", mount.absolute_path());
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fs_object.set("block_size", fs.block_size());
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fs_object.set("readonly", fs.is_readonly());
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JsonObjectSerializer fs_object = array.add_object();
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fs_object.add("class_name", fs.class_name());
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fs_object.add("total_block_count", fs.total_block_count());
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fs_object.add("free_block_count", fs.free_block_count());
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fs_object.add("total_inode_count", fs.total_inode_count());
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fs_object.add("free_inode_count", fs.free_inode_count());
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fs_object.add("mount_point", mount.absolute_path());
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fs_object.add("block_size", fs.block_size());
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fs_object.add("readonly", fs.is_readonly());
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if (fs.is_disk_backed())
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fs_object.set("device", static_cast<const DiskBackedFS&>(fs).device().absolute_path());
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fs_object.add("device", static_cast<const DiskBackedFS&>(fs).device().absolute_path());
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else
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fs_object.set("device", nullptr);
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json.append(move(fs_object));
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fs_object.add("device", nullptr);
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});
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return json.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$cpuinfo(InodeIdentifier)
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@ -603,54 +612,56 @@ Optional<KBuffer> procfs$cpuinfo(InodeIdentifier)
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Optional<KBuffer> procfs$memstat(InodeIdentifier)
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{
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InterruptDisabler disabler;
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JsonObject json;
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json.set("kmalloc_allocated", sum_alloc);
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json.set("kmalloc_available", sum_free);
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json.set("kmalloc_eternal_allocated", kmalloc_sum_eternal);
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json.set("user_physical_allocated", MM.user_physical_pages_used());
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json.set("user_physical_available", MM.user_physical_pages());
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json.set("super_physical_allocated", MM.super_physical_pages_used());
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json.set("super_physical_available", MM.super_physical_pages());
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json.set("kmalloc_call_count", g_kmalloc_call_count);
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json.set("kfree_call_count", g_kfree_call_count);
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return json.serialized<KBufferBuilder>();
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;
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KBufferBuilder builder;
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JsonObjectSerializer json { builder };
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json.add("kmalloc_allocated", sum_alloc);
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json.add("kmalloc_available", sum_free);
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json.add("kmalloc_eternal_allocated", kmalloc_sum_eternal);
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json.add("user_physical_allocated", MM.user_physical_pages_used());
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json.add("user_physical_available", MM.user_physical_pages());
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json.add("super_physical_allocated", MM.super_physical_pages_used());
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json.add("super_physical_available", MM.super_physical_pages());
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json.add("kmalloc_call_count", g_kmalloc_call_count);
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json.add("kfree_call_count", g_kfree_call_count);
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json.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$all(InodeIdentifier)
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{
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InterruptDisabler disabler;
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auto processes = Process::all_processes();
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JsonArray array;
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KBufferBuilder builder;
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JsonArraySerializer array { builder };
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// Keep this in sync with CProcessStatistics.
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auto build_process = [&](const Process& process) {
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JsonObject process_object;
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process_object.set("pid", process.pid());
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process_object.set("times_scheduled", process.main_thread().times_scheduled());
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process_object.set("pgid", process.tty() ? process.tty()->pgid() : 0);
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process_object.set("pgp", process.pgid());
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process_object.set("sid", process.sid());
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process_object.set("uid", process.uid());
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process_object.set("gid", process.gid());
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process_object.set("state", process.main_thread().state_string());
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process_object.set("ppid", process.ppid());
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process_object.set("nfds", process.number_of_open_file_descriptors());
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process_object.set("name", process.name());
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process_object.set("tty", process.tty() ? process.tty()->tty_name() : "notty");
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process_object.set("amount_virtual", process.amount_virtual());
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process_object.set("amount_resident", process.amount_resident());
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process_object.set("amount_shared", process.amount_shared());
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process_object.set("ticks", process.main_thread().ticks());
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process_object.set("priority", to_string(process.priority()));
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process_object.set("syscall_count", process.syscall_count());
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process_object.set("icon_id", process.icon_id());
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array.append(process_object);
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JsonObjectSerializer process_object = array.add_object();
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process_object.add("pid", process.pid());
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process_object.add("times_scheduled", process.main_thread().times_scheduled());
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process_object.add("pgid", process.tty() ? process.tty()->pgid() : 0);
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process_object.add("pgp", process.pgid());
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process_object.add("sid", process.sid());
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process_object.add("uid", process.uid());
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process_object.add("gid", process.gid());
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process_object.add("state", process.main_thread().state_string());
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process_object.add("ppid", process.ppid());
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process_object.add("nfds", process.number_of_open_file_descriptors());
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process_object.add("name", process.name());
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process_object.add("tty", process.tty() ? process.tty()->tty_name() : "notty");
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process_object.add("amount_virtual", process.amount_virtual());
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process_object.add("amount_resident", process.amount_resident());
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process_object.add("amount_shared", process.amount_shared());
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process_object.add("ticks", process.main_thread().ticks());
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process_object.add("priority", to_string(process.priority()));
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process_object.add("syscall_count", process.syscall_count());
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process_object.add("icon_id", process.icon_id());
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};
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build_process(*Scheduler::colonel());
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for (auto* process : processes)
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build_process(*process);
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return array.serialized<KBufferBuilder>();
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array.finish();
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return builder.build();
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}
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Optional<KBuffer> procfs$inodes(InodeIdentifier)
|
||||
|
|
|
|||
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Reference in a new issue