display items as table rows
This commit is contained in:
Florian Stecker
parent
e2fb0cbb47
commit
80942c8ed3
@ -2,8 +2,8 @@ use std::convert::identity;
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use std::rc::Rc;
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use std::ops::{Deref, RangeBounds, Bound};
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use crate::btrfs_structs::{Leaf, Key, Item, InteriorNode, Node, ParseError, ParseBin, Value, Superblock, ItemType, ZERO_KEY, DirItem};
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use crate::addrmap::{node_at_log, LogToPhys, AddressMap};
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use crate::btrfs_structs::{Leaf, Key, Item, InteriorNode, Node, ParseError, ParseBin, Value, Superblock, ItemType, ZERO_KEY};
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use crate::addrmap::{node_at_log, AddressMap};
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/// Represents a B-Tree inside a filesystem image. Can be used to look up keys,
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/// and handles the tree traversal and the virtual address translation.
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@ -40,9 +40,16 @@ impl<'a> Tree<'a> {
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Ok(Tree { image, addr_map, root_addr_log: superblock.root })
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}
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pub fn chunk(image: &'a [u8]) -> Result<Tree<'a>, ParseError> {
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let addr_map = Rc::new(AddressMap::new(image)?);
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let superblock = Superblock::parse(&image[0x10000..])?;
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Ok(Tree { image, addr_map, root_addr_log: superblock.chunk_root })
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}
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/// Read a node given its logical address
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pub fn get_node(&self, addr: u64) -> Result<Rc<Node>, ParseError> {
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eprintln!("Reading node at {:x}", addr);
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// eprintln!("Reading node at {:x}", addr);
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let node_data = node_at_log(self.image, self.addr_map.as_ref(), addr)?;
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let node = Node::parse(node_data)?;
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@ -311,63 +311,63 @@ pub struct RootItem {
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct DirItem {
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location: Key,
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transid: u64,
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data_len: u16,
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name_len: u16,
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dir_type: u8,
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pub location: Key,
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pub transid: u64,
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pub data_len: u16,
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pub name_len: u16,
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pub dir_type: u8,
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// #[len = "name_len"]
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name: CString,
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pub name: CString,
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}
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct FreeSpaceInfoItem {
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extent_count: u32,
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flags: u32,
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pub extent_count: u32,
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pub flags: u32,
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}
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct UUIDSubvolItem {
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subvol_id: u64,
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pub subvol_id: u64,
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}
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct DevItem {
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devid: u64,
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total_bytes: u64,
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bytes_used: u64,
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io_align: u32,
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io_width: u32,
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sector_size: u32,
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dev_type: u64,
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generation: u64,
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start_offset: u64,
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dev_group: u32,
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seek_speed: u8,
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bandwidth: u8,
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uuid: UUID,
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fsid: UUID,
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pub devid: u64,
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pub total_bytes: u64,
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pub bytes_used: u64,
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pub io_align: u32,
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pub io_width: u32,
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pub sector_size: u32,
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pub dev_type: u64,
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pub generation: u64,
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pub start_offset: u64,
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pub dev_group: u32,
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pub seek_speed: u8,
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pub bandwidth: u8,
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pub uuid: UUID,
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pub fsid: UUID,
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}
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct DevExtentItem {
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chunk_tree: u64,
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chunk_objectid: u64,
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chunk_offset: u64,
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length: u64,
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chunk_tree_uuid: UUID,
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pub chunk_tree: u64,
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pub chunk_objectid: u64,
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pub chunk_offset: u64,
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pub length: u64,
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pub chunk_tree_uuid: UUID,
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}
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#[allow(unused)]
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#[derive(Debug,Clone)]
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pub struct ExtentDataItem {
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header: ExtentDataHeader,
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data: ExtentDataBody,
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pub header: ExtentDataHeader,
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pub data: ExtentDataBody,
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}
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#[allow(unused)]
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@ -380,31 +380,31 @@ pub enum ExtentDataBody {
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct ExternalExtent {
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disk_bytenr: u64,
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disk_num_bytes: u64,
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offset: u64,
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num_bytes: u64,
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pub disk_bytenr: u64,
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pub disk_num_bytes: u64,
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pub offset: u64,
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pub num_bytes: u64,
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}
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct ExtentDataHeader {
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generation: u64,
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ram_bytes: u64,
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compression: u8,
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encryption: u8,
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other_encoding: u16,
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extent_type: u8,
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pub generation: u64,
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pub ram_bytes: u64,
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pub compression: u8,
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pub encryption: u8,
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pub other_encoding: u16,
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pub extent_type: u8,
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}
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#[allow(unused)]
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#[derive(Debug,Clone,ParseBin)]
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pub struct RefItem {
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index: u64,
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name_len: u16,
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pub index: u64,
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pub name_len: u16,
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// #[len = "name_len"]
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name: Vec<u8>,
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pub name: CString,
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}
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#[allow(unused)]
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@ -721,6 +721,7 @@ impl fmt::Debug for Checksum {
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}
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}
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#[macro_export]
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macro_rules! key {
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($arg1:expr) => {
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btrfs_structs::Key { key_id: $arg1, key_type: btrfs_structs::ItemType::Invalid, key_offset: 0 }
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@ -733,4 +734,4 @@ macro_rules! key {
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};
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}
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pub(crate) use key;
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//pub(crate) use key;
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195
src/main.rs
195
src/main.rs
@ -3,12 +3,14 @@ use std::{
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env,
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fs::OpenOptions,
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collections::HashMap,
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str::FromStr,
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fs::File,
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};
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use memmap2::Mmap;
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use rouille::{Request, Response, router};
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use parsebtrfs::{
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btrfs_structs::{TreeID, Value::Extent, Value::BlockGroup, ParseError, NODE_SIZE, ItemType},
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btrfs_lookup::Tree,
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btrfs_structs::{TreeID, Value::Extent, Value::BlockGroup, ParseError, NODE_SIZE, ItemType, Item, RootItem, Value, Key, ExtentDataBody},
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btrfs_lookup::Tree, key,
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};
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const COLORS: &[&str] = &["#e6194b", "#3cb44b", "#ffe119", "#4363d8", "#f58231", "#911eb4", "#46f0f0", "#f032e6", "#bcf60c", "#fabebe", "#008080", "#e6beff", "#9a6324", "#fffac8", "#800000", "#aaffc3", "#808000", "#ffd8b1", "#000075", "#808080", "#000000"];
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@ -38,7 +40,11 @@ fn main() -> Result<(), MainError> {
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router!(
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request,
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(GET) ["/"] => http_main_boxes(&image, request),
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(GET) ["/root"] => http_root(&image, None, request),
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(GET) ["/tree/{tree}", tree: String] => http_tree(&image, &tree, None, request),
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(GET) ["/tree/{tree}/{key}", tree: String, key: String] => http_tree(&image, &tree, Some(&key), request),
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(GET) ["/favicon.ico"] => Response::empty_404(),
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(GET) ["/style.css"] => Response::from_file("text/css", File::open("style.css").unwrap()),
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_ => Response::empty_404(),
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)
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});
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@ -46,17 +52,31 @@ fn main() -> Result<(), MainError> {
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static CIRCLE_IMAGE: &str =
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"data:image/png;base64,\
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iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAABhGlDQ1BJQ0MgcHJvZmlsZQAAKJF9\
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kT1Iw0AcxV9bpUUqInYo4pChOtnFLxxrFYpQIdQKrTqYXPoFTRqSFBdHwbXg4Mdi1cHFWVcHV0EQ\
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/ABxdXFSdJES/5cUWsR4cNyPd/ced+8Af7PKVLMnAaiaZWRSSSGXXxWCrwhhEAFEMS0xU58TxTQ8\
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x9c9fHy9i/Ms73N/jn6lYDLAJxAnmG5YxBvEM5uWznmfOMLKkkJ8Tjxu0AWJH7kuu/zGueSwn2dG\
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jGxmnjhCLJS6WO5iVjZU4inimKJqlO/Puaxw3uKsVuusfU/+wnBBW1nmOs0RpLCIJYgQIKOOCqqw\
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EKdVI8VEhvaTHv5hxy+SSyZXBYwcC6hBheT4wf/gd7dmcXLCTQongd4X2/4YBYK7QKth29/Htt06\
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AQLPwJXW8deawOwn6Y2OFjsCBraBi+uOJu8BlztA9EmXDMmRAjT9xSLwfkbflAeGboG+Nbe39j5O\
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H4AsdZW+AQ4OgbESZa97vDvU3du/Z9r9/QChS3K5hXof0gAAAAZiS0dEAP8A/wD/oL2nkwAAAAlw\
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SFlzAAAuIwAALiMBeKU/dgAAAAd0SU1FB+cIEQMcKM7EsV8AAAA/SURBVBjTY2CgGfj//7/8////\
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J/3///8NFE/6//+/PDaFk/5jgknYFL7BovANTJ6JWKchK1yGRX4Z+Z6hGgAAmotacR/hRugAAAAA\
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SUVORK5CYII=";
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iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAP0lEQVQY02NgoBn4//+//P///yf9\
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////DRRP+v//vzw2hZP+Y4JJ2BS+waLwDUyeiVinIStchkV+GfmeoRoAAJqLWnEf4UboAAAAAElF\
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TkSuQmCC";
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static HTML_HEADER: &str = r###"<html>
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<head>
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<link rel="stylesheet" href="/style.css">
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<script>
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document.addEventListener("DOMContentLoaded", function() {
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folds = document.getElementsByClassName("fold");
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for(i = 0; i < folds.length; i++) {
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// folds[i].classList.add("open");
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folds[i].addEventListener("click", (event) => {
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folds[i].classList.add("open");
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});
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}
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});
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</script>
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</head>
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<body>
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"###;
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static HTML_FOOTER: &str = r###"</body>
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</html>
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"###;
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static EXPLANATION_TEXT: &str = "\
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<h3>Chunks</h3>
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@ -64,6 +84,24 @@ static EXPLANATION_TEXT: &str = "\
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<p>Here we look at the metadata chunks. They contain the B-treesm which btrfs gets its name from. They are key-value stores for different kinds of information. For example, the filesystem tree stores which files and directories are in the filesystem, and the extent tree stores which areas of the disk are in use. Each B-tree consists of a number of 16KiB <b>nodes</b>, here symbolized by colorful boxes, with the color indicating which tree the node belongs to. Most of the nodes are <b>leaves</b>, which contain the actual key-value pairs. The others are <b>interior nodes</b>, and we indicate them with a little white circle. They are important to find the leaf a key is stored in.</p>";
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fn root_key_desc(id: u64) -> Option<&'static str> {
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match id {
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1 => Some("root"),
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2 => Some("extent"),
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3 => Some("chunk"),
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4 => Some("device"),
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5 => Some("filesystem"),
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6 => Some("root directory"),
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7 => Some("checksum"),
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8 => Some("quota"),
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9 => Some("UUID"),
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10 => Some("free space"),
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11 => Some("block group"),
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0xffff_ffff_ffff_fff7 => Some("data reloc"),
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_ => None,
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}
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}
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fn http_main_boxes(image: &[u8], _req: &Request) -> Response {
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let mut treecolors: HashMap<u64, &str> = HashMap::new();
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@ -266,6 +304,137 @@ fn http_main_boxes(image: &[u8], _req: &Request) -> Response {
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Response::html(result)
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}
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fn html_item_row(key: Key, value: String, index: usize) -> String {
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let even = if index % 2 == 0 { "even" } else { "odd" };
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format!("<tr class = \"{even}\"><td>{:X}</td><td>{:?}</td><td>{:X}</td><td>{}</td></tr>\n",
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key.key_id, key.key_type, key.key_offset, value)
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}
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fn html_item_row_id_desc(key: Key, value: String, index: usize, desc: &str) -> String {
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let even = if index % 2 == 0 { "even" } else { "odd" };
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format!("<tr class = \"{even}\"><td>{}</td><td>{:?}</td><td>{:X}</td><td>{}</td></tr>\n",
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desc, key.key_type, key.key_offset, value)
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}
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fn item_value_string(tree_id: u64, key: Key, val: &Value) -> String {
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match val {
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Value::Root(_) => {
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format!("<a href=\"/tree/{}\">go</a>", key.key_id)
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},
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Value::Dir(dir_item) =>
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format!("name: {:?}, location: <a href=\"/tree/{}/{:x}\">{:X}<a>",
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&dir_item.name,
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tree_id,
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dir_item.location.key_id,
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dir_item.location.key_id),
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Value::DirIndex(dir_item) =>
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format!("name: {:?}, location: <a href=\"/tree/{}/{:x}\">{:X}<a>",
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&dir_item.name,
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tree_id,
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dir_item.location.key_id,
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dir_item.location.key_id),
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Value::Inode(inode_item) =>
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format!("mode: {:o}, ctime: {}, mtime: {}, otime: {}",
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inode_item.mode,
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inode_item.ctime.sec,
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inode_item.mtime.sec,
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inode_item.otime.sec),
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Value::ExtentData(extent_data_item) =>
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match &extent_data_item.data {
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ExtentDataBody::Inline(data) => format!("inline, len: {}", data.len()),
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ExtentDataBody::External(ext_extent) =>
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format!("external, disk_bytenr: {}, disk_num_bytes: {}, offset: {}, num_bytes: {}",
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ext_extent.disk_bytenr,
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ext_extent.disk_num_bytes,
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ext_extent.offset,
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ext_extent.num_bytes),
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},
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Value::Ref(ref_item) =>
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format!("name: {:?}, index: {}",
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&ref_item.name,
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ref_item.index),
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Value::Extent(extent_item) =>
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format!("flags: {}, block_refs: {:?}", extent_item.flags, extent_item.block_refs),
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Value::BlockGroup(blockgroup_item) =>
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format!("used: {} bytes", blockgroup_item.used),
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Value::DevExtent(dev_extent_item) =>
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format!("chunk_tree: {}, chunk_offset: {:x}, length: {} bytes", dev_extent_item.chunk_tree, dev_extent_item.chunk_offset, dev_extent_item.length),
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Value::UUIDSubvol(uuid_subvol_item) =>
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format!("subvolume id: {}", uuid_subvol_item.subvol_id),
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Value::FreeSpaceInfo(free_space_info) =>
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format!("extent_count: {}, flags: {}", free_space_info.extent_count, free_space_info.flags),
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Value::Dev(dev_item) =>
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format!("total_bytes: {}", dev_item.total_bytes),
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Value::Chunk(chunk_item) =>
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format!("size: {}", chunk_item.size),
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_ => {
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println!("{:?}", val);
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String::new()
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},
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}
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}
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fn http_tree_internal(tree: &Tree, tree_id: u64, key: Option<u64>) -> Response {
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let mut table: Vec<String> = Vec::new();
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table.push(String::from("<table><tbody>"));
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let k = Key {key_id: key.unwrap_or(0), key_type: ItemType::Invalid, key_offset: 0};
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let mut last_key_id: Option<u64> = None;
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let mut key_index = 0;
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for item in tree.range(k..).take(3000) {
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if last_key_id.replace(item.key.key_id).filter(|x| *x != item.key.key_id).is_some() {
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key_index += 1;
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}
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match &item.value {
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Value::Root(_) => {
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let id = match root_key_desc(item.key.key_id) {
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Some(desc) => format!("{:X} ({})", item.key.key_id, desc),
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None => format!("{:X}", item.key.key_id),
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};
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let value = item_value_string(tree_id, item.key, &item.value);
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table.push(html_item_row_id_desc(item.key, value, key_index, &id));
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},
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_ => {
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table.push(html_item_row(item.key, item_value_string(tree_id, item.key, &item.value), key_index));
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},
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}
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}
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table.push(String::from("</tbody></table>"));
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let mut result = String::new();
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result.push_str(HTML_HEADER);
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result.extend(table.iter().map(<String as AsRef<str>>::as_ref));
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result.push_str(HTML_FOOTER);
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Response::html(result)
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}
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fn http_tree(image: &[u8], tree_id: &str, key: Option<&str>, _req: &Request) -> Response {
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let key_id = key.and_then(|x|u64::from_str_radix(x, 16).ok());
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let tree_id = u64::from_str(tree_id).unwrap();
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let tree = if tree_id == 1 {
|
||||
Tree::root(image).unwrap()
|
||||
} else if tree_id == 3 {
|
||||
Tree::chunk(image).unwrap()
|
||||
} else {
|
||||
Tree::new(image, tree_id).unwrap()
|
||||
};
|
||||
http_tree_internal(&tree, tree_id, key_id)
|
||||
}
|
||||
|
||||
fn http_root(image: &[u8], key: Option<&str>, _req: &Request) -> Response {
|
||||
let key_id = key.and_then(|x|u64::from_str_radix(x, 16).ok());
|
||||
let tree = Tree::root(image).unwrap();
|
||||
http_tree_internal(&tree, 1, key_id)
|
||||
}
|
||||
|
||||
|
||||
// ----- Error handling -----
|
||||
|
||||
pub struct MainError(String);
|
||||
|
||||
52
style.css
Normal file
52
style.css
Normal file
@ -0,0 +1,52 @@
|
||||
body {
|
||||
padding: 0.2em 2em;
|
||||
}
|
||||
|
||||
table {
|
||||
width: 100%;
|
||||
}
|
||||
|
||||
table td {
|
||||
padding: 0.1em 0.2em;
|
||||
}
|
||||
|
||||
table tr:nth-child(even) {
|
||||
}
|
||||
|
||||
table th {
|
||||
text-align: left;
|
||||
border-bottom: 1px solid #ccc;
|
||||
}
|
||||
|
||||
table > tbody > tr.view {
|
||||
cursor: pointer;
|
||||
}
|
||||
|
||||
table > tbody > tr.even {
|
||||
background: #eee;
|
||||
}
|
||||
|
||||
table > tbody > tr.fold {
|
||||
display: none;
|
||||
}
|
||||
|
||||
table > tbody > tr.fold > td {
|
||||
padding-left: 1em;
|
||||
}
|
||||
|
||||
table > tbody > tr.fold.open {
|
||||
display: table-row;
|
||||
}
|
||||
|
||||
/*
|
||||
table > tbody > tr.view td:first-child:before {
|
||||
color: #999;
|
||||
content: "x";
|
||||
transition: all 0.3s ease;
|
||||
}
|
||||
|
||||
table > tbody > tr.view.open td:first-child:before {
|
||||
transform: rotate(-180deg);
|
||||
color: #333;
|
||||
}
|
||||
*/
|
||||
Loading…
Reference in New Issue
Block a user