src/bin/proxmox-backup-client.rs

   1 extern crate proxmox_backup;
   2
   3 use failure::*;
   4 use std::os::unix::io::AsRawFd;
   5
   6 use proxmox_backup::tools;
   7 use proxmox_backup::cli::command::*;
   8 use proxmox_backup::api::schema::*;
   9 use proxmox_backup::api::router::*;
  10 //use proxmox_backup::backup::chunk_store::*;
  11 //use proxmox_backup::backup::image_index::*;
  12 //use proxmox_backup::config::datastore;
  13 use proxmox_backup::catar::encoder::*;
  14 use proxmox_backup::backup::datastore::*;
  15 use serde_json::{Value};
  16
  17 fn required_string_param<'a>(param: &'a Value, name: &str) -> &'a str {
  18     param[name].as_str().expect(&format!("missing parameter '{}'", name))
  19 }
  20
  21 fn backup_dir(
  22     datastore: &DataStore,
  23     path: &str,
  24     dir: &mut nix::dir::Dir,
  25     target: &str,
  26     chunk_size: usize,
  27 ) -> Result<(), Error> {
  28
  29     let mut target = std::path::PathBuf::from(target);
  30
  31     if let Some(ext) = target.extension() {
  32         if ext != "aidx" {
  33             bail!("got wrong file extension - expected '.aidx'");
  34         }
  35     } else {
  36         target.set_extension("aidx");
  37     }
  38
  39     let mut index = datastore.create_archive_writer(&target, chunk_size)?;
  40
  41     let path = std::path::PathBuf::from(path);
  42
  43     CaTarEncoder::encode(path, dir, &mut index)?;
  44
  45     index.close()?; // commit changes
  46
  47     Ok(())
  48 }
  49
  50 fn backup_image(datastore: &DataStore, file: &std::fs::File, size: usize, target: &str, chunk_size: usize) -> Result<(), Error> {
  51
  52     let mut target = std::path::PathBuf::from(target);
  53
  54     if let Some(ext) = target.extension() {
  55         if ext != "iidx" {
  56             bail!("got wrong file extension - expected '.iidx'");
  57         }
  58     } else {
  59         target.set_extension("iidx");
  60     }
  61
  62     let mut index = datastore.create_image_writer(&target, size, chunk_size)?;
  63
  64     tools::file_chunker(file, chunk_size, |pos, chunk| {
  65         index.add_chunk(pos, chunk)?;
  66         Ok(true)
  67     })?;
  68
  69     index.close()?; // commit changes
  70
  71     Ok(())
  72 }
  73
  74 fn create_backup(param: Value, _info: &ApiMethod) -> Result<Value, Error> {
  75
  76     let filename = required_string_param(&param, "filename");
  77     let store = required_string_param(&param, "store");
  78     let target = required_string_param(&param, "target");
  79
  80     let mut chunk_size = 4*1024*1024;
  81
  82     if let Some(size) = param["chunk-size"].as_u64() {
  83         static SIZES: [u64; 7] = [64, 128, 256, 512, 1024, 2048, 4096];
  84
  85         if SIZES.contains(&size) {
  86             chunk_size = (size as usize) * 1024;
  87         } else {
  88             bail!("Got unsupported chunk size '{}'", size);
  89         }
  90     }
  91
  92     let datastore = DataStore::open(store)?;
  93
  94     let file = std::fs::File::open(filename)?;
  95     let rawfd = file.as_raw_fd();
  96     let stat = nix::sys::stat::fstat(rawfd)?;
  97
  98     if (stat.st_mode & libc::S_IFDIR) != 0 {
  99         println!("Backup directory '{}' to '{}'", filename, store);
 100
 101         let mut dir = nix::dir::Dir::from_fd(rawfd)?;
 102
 103         backup_dir(&datastore, &filename, &mut dir, &target, chunk_size)?;
 104
 105     } else if (stat.st_mode & (libc::S_IFREG|libc::S_IFBLK)) != 0 {
 106         println!("Backup file '{}' to '{}'", filename, store);
 107
 108         if stat.st_size <= 0 { bail!("got strange file size '{}'", stat.st_size); }
 109         let size = stat.st_size as usize;
 110
 111         backup_image(&datastore, &file, size, &target, chunk_size)?;
 112
 113        // let idx = datastore.open_image_reader(target)?;
 114        // idx.print_info();
 115
 116     } else {
 117         bail!("unsupported file type (expected a directory, file or block device)");
 118     }
 119
 120     //datastore.garbage_collection()?;
 121
 122     Ok(Value::Null)
 123 }
 124
 125
 126 fn main() {
 127
 128     let cmd_def = CliCommand::new(
 129         ApiMethod::new(
 130             create_backup,
 131             ObjectSchema::new("Create backup.")
 132                 .required("filename", StringSchema::new("Source name (file or directory name)"))
 133                 .required("store", StringSchema::new("Datastore name."))
 134                 .required("target", StringSchema::new("Target name."))
 135                 .optional(
 136                     "chunk-size",
 137                     IntegerSchema::new("Chunk size in KB. Must be a power of 2.")
 138                         .minimum(64)
 139                         .maximum(4096)
 140                         .default(4096)
 141                 )
 142         ))
 143         .arg_param(vec!["filename", "target"])
 144         .completion_cb("store", proxmox_backup::config::datastore::complete_datastore_name);
 145
 146
 147     if let Err(err) = run_cli_command(&cmd_def.into()) {
 148         eprintln!("Error: {}", err);
 149         if err.downcast::<UsageError>().is_ok() {
 150             print_cli_usage();
 151         }
 152         std::process::exit(-1);
 153     }
 154
 155 }