From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id BEA0BDDA6 for ; Fri, 22 Sep 2023 14:41:51 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 990D0A614 for ; Fri, 22 Sep 2023 14:41:21 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for ; Fri, 22 Sep 2023 14:41:19 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 2ACB148807 for ; Fri, 22 Sep 2023 14:41:19 +0200 (CEST) From: Filip Schauer To: pbs-devel@lists.proxmox.com Date: Fri, 22 Sep 2023 14:41:11 +0200 Message-Id: <20230922124111.121415-1-f.schauer@proxmox.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.007 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [main.rs, default.mk, vma.rs, matches.free, proxmox.com, build.rs] Subject: [pbs-devel] [PATCH vma-to-pbs] Initial commit X-BeenThere: pbs-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox Backup Server development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Sep 2023 12:41:51 -0000 Implement a tool to import VMA files into a Proxmox Backup Server Signed-off-by: Filip Schauer --- I could not assign this to one distinct repository, so I propose a new one. In its current state this will not be able to build a deb package yet since the debian directory is missing. The program calls extern "C" functions from proxmox-backup-qemu to interface with the Backup Server. I chose these functions since those are the only abstracted functions I could find. The proxmox-sys dependency is used for reading passwords from the tty. .cargo/config | 5 + .gitmodules | 6 + Cargo.toml | 16 ++ Makefile | 70 ++++++++ src/main.rs | 266 +++++++++++++++++++++++++++++ src/vma.rs | 297 +++++++++++++++++++++++++++++++++ submodules/proxmox | 1 + submodules/proxmox-backup-qemu | 1 + 8 files changed, 662 insertions(+) create mode 100644 .cargo/config create mode 100644 .gitmodules create mode 100644 Cargo.toml create mode 100644 Makefile create mode 100644 src/main.rs create mode 100644 src/vma.rs create mode 160000 submodules/proxmox create mode 160000 submodules/proxmox-backup-qemu diff --git a/.cargo/config b/.cargo/config new file mode 100644 index 0000000..3b5b6e4 --- /dev/null +++ b/.cargo/config @@ -0,0 +1,5 @@ +[source] +[source.debian-packages] +directory = "/usr/share/cargo/registry" +[source.crates-io] +replace-with = "debian-packages" diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000..526f5ef --- /dev/null +++ b/.gitmodules @@ -0,0 +1,6 @@ +[submodule "submodules/proxmox-backup-qemu"] + path = submodules/proxmox-backup-qemu + url = git://git.proxmox.com/git/proxmox-backup-qemu.git +[submodule "submodules/proxmox"] + path = submodules/proxmox + url = git://git.proxmox.com/git/proxmox.git diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..72e2812 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,16 @@ +[package] +name = "vma-to-pbs" +version = "0.0.1" +authors = ["Filip Schauer "] +edition = "2021" + +[dependencies] +getopts = "0.2" +proxmox-sys = { path = "submodules/proxmox/proxmox-sys" } +proxmox-backup-qemu = { path = "submodules/proxmox-backup-qemu" } +proxmox-uuid = "1" +md5 = "0.7.0" +bincode = "1.3" +serde = "1.0" +serde-big-array = "0.4.1" +array-init = "2.0.1" diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..a0c841d --- /dev/null +++ b/Makefile @@ -0,0 +1,70 @@ +include /usr/share/dpkg/default.mk + +PACKAGE = proxmox-vma-to-pbs +BUILDDIR = $(PACKAGE)-$(DEB_VERSION_UPSTREAM) + +ARCH := $(DEB_BUILD_ARCH) + +DSC=$(DEB_SOURCE)_$(DEB_VERSION).dsc +MAIN_DEB=$(PACKAGE)_$(DEB_VERSION)_$(ARCH).deb +OTHER_DEBS = \ + $(PACKAGE)-dev_$(DEB_VERSION)_$(ARCH).deb \ + $(PACKAGE)-dbgsym_$(DEB_VERSION)_$(ARCH).deb +DEBS=$(MAIN_DEB) $(OTHER_DEBS) + +DESTDIR= + +TARGET_DIR := target/debug + +ifeq ($(BUILD_MODE), release) +CARGO_BUILD_ARGS += --release +TARGETDIR := target/release +endif + +.PHONY: all build +all: build + +build: $(TARGETDIR)/vma-to-pbs +$(TARGETDIR)/vma-to-pbs: Cargo.toml src/ + cargo build $(CARGO_BUILD_ARGS) + +.PHONY: install +install: $(TARGETDIR)/vma-to-pbs + install -D -m 0755 $(TARGETDIR)/vma-to-pbs $(DESTDIR)/usr/bin/vma-to-pbs + +$(BUILDDIR): submodule + rm -rf $@ $@.tmp && mkdir $@.tmp + cp -a submodules debian Makefile .cargo Cargo.toml build.rs src $@.tmp/ + mv $@.tmp $@ + +submodule: + [ -e submodules/proxmox-backup-qemu/Cargo.toml ] || [ -e submodules/proxmox/proxmox-sys/Cargo.toml ] || git submodule update --init --recursive + +dsc: + rm -rf $(BUILDDIR) $(DSC) + $(MAKE) $(DSC) + lintian $(DSC) + +$(DSC): $(BUILDDIR) + cd $(BUILDDIR); dpkg-buildpackage -S -us -uc -d + +sbuild: $(DSC) + sbuild $< + +.PHONY: deb dsc +deb: $(OTHER_DEBS) +$(OTHER_DEBS): $(MAIN_DEB) +$(MAIN_DEB): $(BUILDDIR) + cd $(BUILDDIR); dpkg-buildpackage -b -us -uc + lintian $(DEBS) + +distclean: clean +clean: + cargo clean + rm -rf $(PACKAGE)-[0-9]*/ + rm -r *.deb *.dsc $(DEB_SOURCE)*.tar* *.build *.buildinfo *.changes Cargo.lock + +.PHONY: dinstall +dinstall: $(DEBS) + dpkg -i $(DEBS) + diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..1e8c240 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,266 @@ +extern crate getopts; +extern crate proxmox_sys; +extern crate proxmox_backup_qemu; + +use std::time::{SystemTime, UNIX_EPOCH}; +use std::ffi::{c_char, CStr, CString}; +use std::env; +use std::ptr; + +use getopts::Options; +use proxmox_sys::linux::tty; +use proxmox_backup_qemu::*; + +mod vma; +use vma::*; + +fn print_usage(program: &str, opts: Options) { + let brief = format!("Usage: {} vma_file [options]", program); + print!("{}", opts.usage(&brief)); +} + +fn backup_vma_to_pbs( + vma_file_path: String, + pbs_repository: String, + backup_id: String, + pbs_password: String, + keyfile: Option, + key_password: Option, + master_keyfile: Option, + fingerprint: String, + compress: bool, + encrypt: bool +) { + println!("VMA input file: {}", vma_file_path); + println!("PBS repository: {}", pbs_repository); + println!("PBS fingerprint: {}", fingerprint); + println!("compress: {}", compress); + println!("encrypt: {}", encrypt); + + let backup_time = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs(); + println!("backup time: {}", backup_time); + + let pbs_err: *mut c_char = ptr::null_mut(); + + let pbs_repository_cstr = CString::new(pbs_repository).unwrap(); + let backup_id_cstr = CString::new(backup_id).unwrap(); + let pbs_password_cstr = CString::new(pbs_password).unwrap(); + let fingerprint_cstr = CString::new(fingerprint).unwrap(); + let keyfile_cstr = match keyfile { + Some(x) => Some(CString::new(x).unwrap()), + None => None + }; + let keyfile_ptr = match keyfile_cstr { + Some(x) => x.as_ptr(), + None => ptr::null() + }; + let key_password_cstr = match key_password { + Some(x) => Some(CString::new(x).unwrap()), + None => None + }; + let key_password_ptr = match key_password_cstr { + Some(x) => x.as_ptr(), + None => ptr::null() + }; + let master_keyfile_cstr = match master_keyfile { + Some(x) => Some(CString::new(x).unwrap()), + None => None + }; + let master_keyfile_ptr = match master_keyfile_cstr { + Some(x) => x.as_ptr(), + None => ptr::null() + }; + + let pbs = proxmox_backup_new_ns( + pbs_repository_cstr.as_ptr(), + ptr::null(), + backup_id_cstr.as_ptr(), + backup_time, + PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE, + pbs_password_cstr.as_ptr(), + keyfile_ptr, + key_password_ptr, + master_keyfile_ptr, + true, + false, + fingerprint_cstr.as_ptr(), + &pbs_err as *const _ as *mut _); + + if pbs == ptr::null_mut() { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_new_ns failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + + let connect_result = proxmox_backup_connect(pbs, &pbs_err as *const _ as *mut _); + + if connect_result < 0 { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_connect failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + + let mut vma_reader = VmaReader::new(&vma_file_path); + + // Handle configs + let configs = vma_reader.get_configs(); + for (config_name, config_data) in &configs { + println!("CFG: size: {} name: {}", config_data.len(), config_name); + + let config_name_cstr = CString::new(config_name.as_bytes()).unwrap(); + + if proxmox_backup_add_config(pbs, config_name_cstr.as_ptr(), config_data.as_ptr(), config_data.len() as u64, &pbs_err as *const _ as *mut _) < 0 { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_add_config failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + } + + // Handle block devices + for device_id in 0..255 { + let device_name = match vma_reader.get_device_name(device_id) { + Some(x) => { x } + None => { continue; } + }; + + let device_size = match vma_reader.get_device_size(device_id) { + Some(x) => { x } + None => { continue; } + }; + + println!("DEV: dev_id={} size: {} devname: {}", device_id, device_size, device_name); + + let device_name_cstr = CString::new(device_name.as_bytes()).unwrap(); + let pbs_device_id = proxmox_backup_register_image(pbs, device_name_cstr.as_ptr(), device_size, false, &pbs_err as *const _ as *mut _); + + if pbs_device_id < 0 { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_register_image failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + + let mut image_chunk_buffer = [0u8; PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE as usize]; + let mut bytes_transferred = 0; + + while bytes_transferred < device_size { + let bytes_left = device_size - bytes_transferred; + let this_chunk_size = if bytes_left < PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE { bytes_left } else { PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE }; + println!("Uploading dev_id: {} offset: {:#0X} - {:#0X}", device_id, bytes_transferred, bytes_transferred + this_chunk_size); + + let is_zero_chunk = vma_reader.read_device_contents(device_id, &mut image_chunk_buffer, bytes_transferred).unwrap(); + let write_data_result = proxmox_backup_write_data( + pbs, + pbs_device_id as u8, + if is_zero_chunk { ptr::null() } else { image_chunk_buffer.as_ptr() }, + bytes_transferred, + this_chunk_size, + &pbs_err as *const _ as *mut _ + ); + + if write_data_result < 0 { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_write_data failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + + bytes_transferred += this_chunk_size; + } + + if proxmox_backup_close_image(pbs, pbs_device_id as u8, &pbs_err as *const _ as *mut _) < 0 { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_close_image failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + } + + if proxmox_backup_finish(pbs, &pbs_err as *const _ as *mut _) < 0 { + unsafe { + let pbs_err_cstr = CStr::from_ptr(pbs_err); + panic!("proxmox_backup_finish failed: {}", pbs_err_cstr.to_str().unwrap()); + } + } + + proxmox_backup_disconnect(pbs); +} + +fn main() { + let args: Vec = env::args().collect(); + let program = args[0].clone(); + + let mut opts = Options::new(); + opts.optopt("", "repository", "Repository URL", "@::"); + opts.optopt("", "vmid", "Backup ID", "VMID"); + opts.optopt("", "fingerprint", "Proxmox Backup Server Fingerprint", "FINGERPRINT"); + opts.optopt("", "keyfile", "Key file", "KEYFILE"); + opts.optopt("", "master_keyfile", "Master key file", "MASTER_KEYFILE"); + opts.optflag("c", "compress", "Compress the Backup"); + opts.optflag("e", "encrypt", "Encrypt the Backup"); + opts.optflag("h", "help", "print this help menu"); + let matches = match opts.parse(&args[1..]) { + Ok(m) => { m } + Err(f) => { panic!("{}", f.to_string()) } + }; + + if matches.opt_present("h") { + print_usage(&program, opts); + return; + } + + if !matches.opt_present("repository") { + println!("missing --repository option"); + print_usage(&program, opts); + return; + } + let pbs_repository = matches.opt_str("repository").unwrap(); + + if !matches.opt_present("vmid") { + println!("missing --vmid option"); + print_usage(&program, opts); + return; + } + let vmid = matches.opt_str("vmid").unwrap(); + + if !matches.opt_present("fingerprint") { + println!("missing --fingerprint option"); + print_usage(&program, opts); + return; + } + let fingerprint = matches.opt_str("fingerprint").unwrap(); + + let keyfile = matches.opt_str("keyfile"); + let master_keyfile = matches.opt_str("master_keyfile"); + let compress = matches.opt_present("c"); + let encrypt = matches.opt_present("e"); + + let vma_file_path = if !matches.free.is_empty() { + matches.free[0].clone() + } else { + print_usage(&program, opts); + return; + }; + + let pbs_password = String::from_utf8(tty::read_password(&"Password: ").unwrap()).unwrap(); + let key_password = match keyfile { + Some(_) => Some(String::from_utf8(tty::read_password(&"Key Password: ").unwrap()).unwrap()), + None => None + }; + + backup_vma_to_pbs( + vma_file_path, + pbs_repository, + vmid, + pbs_password, + keyfile, + key_password, + master_keyfile, + fingerprint, + compress, + encrypt + ); +} diff --git a/src/vma.rs b/src/vma.rs new file mode 100644 index 0000000..4b239c8 --- /dev/null +++ b/src/vma.rs @@ -0,0 +1,297 @@ +extern crate md5; + +use std::fs::File; +use std::io::{Read, Seek, SeekFrom}; +use std::mem::size_of; +use std::{cmp, error, str, result}; +use std::collections::HashMap; + +use array_init::array_init; +use bincode::*; +use serde::{Deserialize, Serialize}; +use serde_big_array::BigArray; + +const VMA_BLOCKS_PER_EXTENT: usize = 59; +const VMA_MAX_CONFIGS: usize = 256; + +#[repr(C)] +#[derive(Serialize, Deserialize)] +struct VmaDeviceInfoHeader { + pub device_name_offset: u32, + reserved: [u8; 4], + pub device_size: u64, + reserved1: [u8; 16] +} + +#[repr(C)] +#[derive(Serialize, Deserialize)] +struct VmaHeader { + pub magic: [u8; 4], + pub version: u32, + pub uuid: [u8; 16], + pub ctime: u64, + pub md5sum: [u8; 16], + pub blob_buffer_offset: u32, + pub blob_buffer_size: u32, + pub header_size: u32, + #[serde(with = "BigArray")] + reserved: [u8; 1984], + #[serde(with = "BigArray")] + pub config_names: [u32; 256], + #[serde(with = "BigArray")] + pub config_data: [u32; 256], + reserved1: [u8; 4], + #[serde(with = "BigArray")] + pub dev_info: [VmaDeviceInfoHeader; 256] +} + +#[repr(C)] +#[derive(Serialize, Deserialize)] +struct VmaBlockInfo { + pub mask: u16, + reserved: u8, + pub dev_id: u8, + pub cluster_num: u32 +} + +#[repr(C)] +#[derive(Serialize, Deserialize)] +struct VmaExtentHeader { + pub magic: [u8; 4], + reserved: [u8; 2], + pub block_count: u16, + pub uuid: [u8; 16], + pub md5sum: [u8; 16], + #[serde(with = "BigArray")] + pub blockinfo: [VmaBlockInfo; VMA_BLOCKS_PER_EXTENT] +} + +#[derive(Clone)] +struct VmaBlockIndexEntry { + pub cluster_file_offset: u64, + pub mask: u16 +} + +pub struct VmaReader { + vma_file: File, + vma_header: VmaHeader, + configs: HashMap, + block_index: [Vec; 256], + blocks_are_indexed: bool +} + +impl VmaReader { + pub fn new(vma_file_path: &str) -> Self { + let mut vma_file = match File::open(vma_file_path) { + Err(why) => panic!("couldn't open {}: {}", vma_file_path, why), + Ok(file) => file, + }; + + let vma_header = Self::read_header(&mut vma_file).unwrap(); + let configs = Self::read_blob_buffer(&mut vma_file, &vma_header).unwrap(); + let block_index: [Vec; 256] = array_init(|_| Vec::new()); + + let instance = Self { + vma_file, + vma_header, + configs, + block_index, + blocks_are_indexed: false + }; + + return instance; + } + + fn read_header(vma_file: &mut File) -> result::Result> { + let mut buffer = vec![0u8; size_of::()]; + vma_file.read_exact(&mut buffer)?; + + let bincode_options = bincode::DefaultOptions::new() + .with_fixint_encoding() + .with_big_endian(); + + let vma_header: VmaHeader = bincode_options.deserialize(&buffer)?; + + if vma_header.magic != [b'V', b'M', b'A', 0] { + return Err("Invalid magic number".into()); + } + + if vma_header.version != 1 { + return Err(format!("Invalid VMA version {}", vma_header.version).into()); + } + + buffer.resize(vma_header.header_size as usize, 0); + vma_file.read_exact(&mut buffer[size_of::()..])?; + + buffer[32..48].fill(0); + let computed_md5sum: [u8; 16] = md5::compute(&buffer).into(); + + if vma_header.md5sum != computed_md5sum { + return Err("Wrong VMA header checksum".into()); + } + + return Ok(vma_header); + } + + fn read_string_from_file(vma_file: &mut File, file_offset: u64) -> result::Result> { + let mut size_bytes = [0u8; 2]; + vma_file.seek(SeekFrom::Start(file_offset))?; + vma_file.read_exact(&mut size_bytes)?; + let size = u16::from_le_bytes(size_bytes) as usize; + let mut string_bytes = vec![0u8; size - 1]; + vma_file.read_exact(&mut string_bytes)?; + let string = str::from_utf8(&string_bytes)?; + + return Ok(string.to_string()); + } + + fn read_blob_buffer(vma_file: &mut File, vma_header: &VmaHeader) -> result::Result, Box> { + let mut configs = HashMap::new(); + + for i in 0..VMA_MAX_CONFIGS { + let config_name_offset = vma_header.config_names[i]; + let config_data_offset = vma_header.config_data[i]; + + if config_name_offset == 0 || config_data_offset == 0 { + continue; + } + + let config_name_file_offset = (vma_header.blob_buffer_offset + config_name_offset) as u64; + let config_data_file_offset = (vma_header.blob_buffer_offset + config_data_offset) as u64; + let config_name = Self::read_string_from_file(vma_file, config_name_file_offset)?; + let config_data = Self::read_string_from_file(vma_file, config_data_file_offset)?; + + configs.insert(String::from(config_name), String::from(config_data)); + } + + return Ok(configs); + } + + pub fn get_configs(&self) -> HashMap { + return self.configs.clone(); + } + + pub fn get_device_name(&mut self, device_id: u8) -> Option { + let device_name_offset = self.vma_header.dev_info[device_id as usize].device_name_offset; + + if device_name_offset == 0 { + return None; + } + + let device_name_file_offset = (self.vma_header.blob_buffer_offset + device_name_offset) as u64; + let device_name = Self::read_string_from_file(&mut self.vma_file, device_name_file_offset).unwrap(); + + return Some(device_name.to_string()); + } + + pub fn get_device_size(&self, device_id: u8) -> Option { + if self.vma_header.dev_info[device_id as usize].device_name_offset == 0 { + return None; + } + + return Some(self.vma_header.dev_info[device_id as usize].device_size); + } + + fn read_extent_header(vma_file: &mut File) -> result::Result> { + let mut buffer = vec![0u8; size_of::()]; + vma_file.read_exact(&mut buffer)?; + + let bincode_options = bincode::DefaultOptions::new() + .with_fixint_encoding() + .with_big_endian(); + + let vma_extent_header: VmaExtentHeader = bincode_options.deserialize(&buffer)?; + + if vma_extent_header.magic != [b'V', b'M', b'A', b'E'] { + return Err("Invalid magic number".into()); + } + + buffer[24..40].fill(0); + let computed_md5sum: [u8; 16] = md5::compute(&buffer).into(); + + if vma_extent_header.md5sum != computed_md5sum { + return Err("Wrong VMA extent header checksum".into()); + } + + return Ok(vma_extent_header); + } + + fn index_device_clusters(&mut self) -> result::Result<(), Box> { + for device_id in 0..255 { + let device_size = match self.get_device_size(device_id) { + Some(x) => { x } + None => { continue; } + }; + + let device_cluster_count = (device_size + 4096 * 16 - 1) / (4096 * 16); + + let block_index_entry_placeholder = VmaBlockIndexEntry { + cluster_file_offset: 0, + mask: 0 + }; + + self.block_index[device_id as usize].resize(device_cluster_count as usize, block_index_entry_placeholder); + } + + let mut file_offset = self.vma_header.header_size as u64; + let vma_file_size = self.vma_file.metadata()?.len(); + + while file_offset < vma_file_size { + self.vma_file.seek(SeekFrom::Start(file_offset))?; + let vma_extent_header = Self::read_extent_header(&mut self.vma_file)?; + file_offset += 512; + + for i in 0..59 as usize { + let blockinfo = &vma_extent_header.blockinfo[i]; + + if blockinfo.dev_id == 0 { + continue; + } + + let block_index_entry = VmaBlockIndexEntry { + cluster_file_offset: file_offset, + mask: blockinfo.mask + }; + + self.block_index[blockinfo.dev_id as usize][blockinfo.cluster_num as usize] = block_index_entry; + file_offset += blockinfo.mask.count_ones() as u64 * 4096; + } + } + + return Ok(()); + } + + pub fn read_device_contents(&mut self, device_id: u8, buffer: &mut [u8], offset: u64) -> result::Result> { + assert_eq!(offset % (4096 * 16), 0); + + // Make sure that the device clusters are already indexed + if !self.blocks_are_indexed { + self.index_device_clusters()?; + } + + let this_device_block_index = &self.block_index[device_id as usize]; + let length = cmp::min(buffer.len(), this_device_block_index.len() * 4096 * 16 - offset as usize); + let mut buffer_offset = 0; + let mut buffer_is_zero = true; + + while buffer_offset < length { + let block_index_entry = &this_device_block_index[(offset as usize + buffer_offset) / (4096 * 16)]; + self.vma_file.seek(SeekFrom::Start(block_index_entry.cluster_file_offset))?; + + for i in 0..16 { + let current_block_mask = ((block_index_entry.mask >> i) & 1) == 1; + + if current_block_mask { + self.vma_file.read_exact(&mut buffer[buffer_offset..(buffer_offset + 4096)])?; + buffer_is_zero = false; + } else { + buffer[buffer_offset..(buffer_offset + 4096)].fill(0); + } + + buffer_offset += 4096; + } + } + + return Ok(buffer_is_zero); + } +} diff --git a/submodules/proxmox b/submodules/proxmox new file mode 160000 index 0000000..dc9ee73 --- /dev/null +++ b/submodules/proxmox @@ -0,0 +1 @@ +Subproject commit dc9ee737512fc2c7325f47b875d6c69ccf484cea diff --git a/submodules/proxmox-backup-qemu b/submodules/proxmox-backup-qemu new file mode 160000 index 0000000..73a09e9 --- /dev/null +++ b/submodules/proxmox-backup-qemu @@ -0,0 +1 @@ +Subproject commit 73a09e96720434e4aba7f876f9c6cf56bce58c2c -- 2.39.2