[pve-devel] [PATCH installer v4 21/30] auto-installer: fetch: add gathering of system identifiers and restructure code

[Aaron Lauterer <a.lauterer@proxmox.com>]

They will be used as payload when POSTing a request for an answer file. The
idea is, that with this information, it should be possible to identify
the system and generate a matching answer file on the fly.
Many of these properties can also be found on the machine or packaging
of the machine and could therefore be scanned into a database.

Identifiers are the following properties from `dmidecode` sections 1, 2,
and 3:
* Asset Tag
* Product Name
* Serial Number
* SKU Number
* UUID

As well as a list of the MAC addresses of all the NICs and the product
type: pve, pmg, pbs.

Since we now have more than a simple utils.rs module in the fetch
plugins, it, and the additional fetch plugin utilities are placed in
their own directory.

Signed-off-by: Aaron Lauterer <a.lauterer@proxmox.com>
---
 .../src/fetch_plugins/mod.rs                  |  2 +-
 .../fetch_plugins/{utils.rs => utils/mod.rs}  | 43 ++++++++--
 .../src/fetch_plugins/utils/sysinfo.rs        | 81 +++++++++++++++++++
 3 files changed, 119 insertions(+), 7 deletions(-)
 rename proxmox-auto-installer/src/fetch_plugins/{utils.rs => utils/mod.rs} (72%)
 create mode 100644 proxmox-auto-installer/src/fetch_plugins/utils/sysinfo.rs

diff --git a/proxmox-auto-installer/src/fetch_plugins/mod.rs b/proxmox-auto-installer/src/fetch_plugins/mod.rs
index 11d6937..6f1e8a2 100644
--- a/proxmox-auto-installer/src/fetch_plugins/mod.rs
+++ b/proxmox-auto-installer/src/fetch_plugins/mod.rs
@@ -1,2 +1,2 @@
 pub mod partition;
-mod utils;
+pub mod utils;
diff --git a/proxmox-auto-installer/src/fetch_plugins/utils.rs b/proxmox-auto-installer/src/fetch_plugins/utils/mod.rs
similarity index 72%
rename from proxmox-auto-installer/src/fetch_plugins/utils.rs
rename to proxmox-auto-installer/src/fetch_plugins/utils/mod.rs
index f2a8e74..b3e9dad 100644
--- a/proxmox-auto-installer/src/fetch_plugins/utils.rs
+++ b/proxmox-auto-installer/src/fetch_plugins/utils/mod.rs
@@ -1,5 +1,7 @@
-use anyhow::{bail, Error, Result};
+use anyhow::{Error, Result};
 use log::{info, warn};
+use serde::Deserialize;
+use serde_json;
 use std::{
     fs::{self, create_dir_all},
     path::{Path, PathBuf},
@@ -10,6 +12,8 @@ static ANSWER_MP: &str = "/mnt/answer";
 static PARTLABEL: &str = "proxmoxinst";
 static SEARCH_PATH: &str = "/dev/disk/by-label";
 
+pub mod sysinfo;
+
 /// Searches for upper and lower case existence of the partlabel in the search_path
 ///
 /// # Arguemnts
@@ -20,10 +24,10 @@ pub fn scan_partlabels(partlabel_source: &str, search_path: &str) -> Result<Path
     let path = Path::new(search_path).join(&partlabel);
     match path.try_exists() {
         Ok(true) => {
-            info!("Found partition with label '{partlabel}'");
+            info!("Found partition with label '{}'", partlabel);
             return Ok(path);
         }
-        Ok(false) => info!("Did not detect partition with label '{partlabel}'"),
+        Ok(false) => info!("Did not detect partition with label '{}'", partlabel),
         Err(err) => info!("Encountered issue, accessing '{}': {}", path.display(), err),
     }
 
@@ -31,13 +35,15 @@ pub fn scan_partlabels(partlabel_source: &str, search_path: &str) -> Result<Path
     let path = Path::new(search_path).join(&partlabel);
     match path.try_exists() {
         Ok(true) => {
-            info!("Found partition with label '{partlabel}'");
+            info!("Found partition with label '{}'", partlabel);
             return Ok(path);
         }
-        Ok(false) => info!("Did not detect partition with label '{partlabel}'"),
+        Ok(false) => info!("Did not detect partition with label '{}'", partlabel),
         Err(err) => info!("Encountered issue, accessing '{}': {}", path.display(), err),
     }
-    bail!("Could not detect upper or lower case labels for '{partlabel_source}'");
+    Err(Error::msg(format!(
+        "Could not detect upper or lower case labels for '{partlabel_source}'"
+    )))
 }
 
 /// Will search and mount a partition/FS labeled proxmoxinst in lower or uppercase to ANSWER_MP;
@@ -79,3 +85,28 @@ fn check_if_mounted(target_path: &str) -> Result<bool> {
     }
     Ok(false)
 }
+
+#[derive(Deserialize, Debug)]
+struct IpLinksUdevInfo {
+    ifname: String,
+}
+
+/// Returns vec of usable NICs
+pub fn get_nic_list() -> Result<Vec<String>> {
+    let ip_output = Command::new("/usr/sbin/ip")
+        .arg("-j")
+        .arg("link")
+        .output()?;
+    let parsed_links: Vec<IpLinksUdevInfo> =
+        serde_json::from_str(String::from_utf8(ip_output.stdout)?.as_str())?;
+    let mut links: Vec<String> = Vec::new();
+
+    for link in parsed_links {
+        if link.ifname == *"lo" {
+            continue;
+        }
+        links.push(link.ifname);
+    }
+
+    Ok(links)
+}
diff --git a/proxmox-auto-installer/src/fetch_plugins/utils/sysinfo.rs b/proxmox-auto-installer/src/fetch_plugins/utils/sysinfo.rs
new file mode 100644
index 0000000..8c57283
--- /dev/null
+++ b/proxmox-auto-installer/src/fetch_plugins/utils/sysinfo.rs
@@ -0,0 +1,81 @@
+use anyhow::{bail, Result};
+use proxmox_installer_common::setup::SetupInfo;
+use serde::Serialize;
+use std::{collections::HashMap, fs, io, path::Path};
+
+use super::get_nic_list;
+
+const DMI_PATH: &str = "/sys/devices/virtual/dmi/id";
+
+pub fn get_sysinfo(pretty: bool) -> Result<String> {
+    let system_files = vec![
+        "product_serial",
+        "product_sku",
+        "product_uuid",
+        "product_name",
+    ];
+    let baseboard_files = vec!["board_asset_tag", "board_serial", "board_name"];
+    let chassis_files = vec!["chassis_serial", "chassis_sku", "chassis_asset_tag"];
+
+    let system = get_dmi_infos(system_files)?;
+    let baseboard = get_dmi_infos(baseboard_files)?;
+    let chassis = get_dmi_infos(chassis_files)?;
+
+    let mut mac_addresses: Vec<String> = Vec::new();
+    let links = get_nic_list()?;
+    for link in links {
+        let address = fs::read_to_string(format!("/sys/class/net/{link}/address"))?;
+        let address = String::from(address.trim());
+        mac_addresses.push(address);
+    }
+
+    let iso_info = Path::new("/run/proxmox-installer/iso-info.json");
+    let mut product = String::from("Not available. Would be one of the following: pve, pmg, pbs");
+    if iso_info.exists() {
+        let file = fs::File::open("/run/proxmox-installer/iso-info.json")?;
+        let reader = io::BufReader::new(file);
+        let setup_info: SetupInfo = serde_json::from_reader(reader)?;
+        product = setup_info.config.product.to_string();
+    }
+
+    let sysinfo = SysInfo {
+        product,
+        system,
+        baseboard,
+        chassis,
+        mac_addresses,
+    };
+    if pretty {
+        return Ok(serde_json::to_string_pretty(&sysinfo)?);
+    }
+    Ok(serde_json::to_string(&sysinfo)?)
+}
+
+#[derive(Debug, Serialize)]
+struct SysInfo {
+    product: String,
+    system: HashMap<String, String>,
+    baseboard: HashMap<String, String>,
+    chassis: HashMap<String, String>,
+    mac_addresses: Vec<String>,
+}
+
+fn get_dmi_infos(files: Vec<&str>) -> Result<HashMap<String, String>> {
+    let mut res: HashMap<String, String> = HashMap::new();
+
+    for file in files {
+        let path = format!("{DMI_PATH}/{file}");
+        let content = match fs::read_to_string(&path) {
+            Err(ref err) if err.kind() == std::io::ErrorKind::NotFound => continue,
+            Err(ref err) if err.kind() == std::io::ErrorKind::PermissionDenied => {
+                bail!("Could not read data. Are you running as root or with sudo?")
+            }
+            Err(err) => bail!("Error: '{err}' on '{path}'"),
+            Ok(content) => content.trim().into(),
+        };
+        let key = file.splitn(2, '_').last().unwrap();
+        res.insert(key.into(), content);
+    }
+
+    Ok(res)
+}
-- 
2.39.2