modem: Migrate dump_modem.sh to rust
Test: adb bugreport
Bug: 286755695
Flag: EXEMPT refactor
Change-Id: I69b147263d423594a51904970ce5af05eff3b03b
Signed-off-by: Mahesh Kallelil <kallelil@google.com>
diff --git a/modem/dump_modemlog/dump_modem.rs b/modem/dump_modemlog/dump_modem.rs
new file mode 100644
index 0000000..d9af7eb
--- /dev/null
+++ b/modem/dump_modemlog/dump_modem.rs
@@ -0,0 +1,109 @@
+// Copyright 2024 Google LLC
+
+//! The dump_modem binary is used to capture kernel/userspace logs in bugreport
+
+use std::fs;
+
+const MODEM_STAT: &str = "/data/vendor/modem_stat/debug.txt";
+const SSRDUMP_DIR: &str = "/data/vendor/ssrdump";
+const RFSD_ERR_LOG_DIR: &str = "/data/vendor/log/rfsd";
+const WAKEUP_EVENTS: &str = "/sys/devices/platform/cpif/wakeup_events";
+const CPIF_LOGBUFFER: &str = "/dev/logbuffer_cpif";
+const PCIE_EVENT_STATS: &str = "/sys/devices/platform/cpif/modem/pcie_event_stats";
+
+fn handle_io_error(file: &str, err: std::io::Error) {
+ match err.kind() {
+ std::io::ErrorKind::NotFound => println!("{file} not found!"),
+ std::io::ErrorKind::PermissionDenied => println!("Permission denied to access {file}"),
+ _ => println!("I/O error accessing {file}: {err}"),
+ }
+}
+
+fn print_file(file: &str) -> Result<(), std::io::Error> {
+ fs::metadata(file)?;
+
+ let data = fs::read_to_string(file)?;
+
+ if data.is_empty() {
+ println!("{file} is empty");
+ } else {
+ print!("{data}");
+ }
+
+ Ok(())
+}
+
+fn print_file_and_handle_error(file: &str) {
+ if let Err(err) = print_file(file) {
+ handle_io_error(file, err);
+ }
+}
+
+fn print_matching_files_in_dir(dir: &str, filename: &str) {
+ let Ok(entries) = fs::read_dir(dir) else {
+ return println!("Cannot open directory {dir}");
+ };
+
+ for entry in entries {
+ let Ok(entry) = entry else {
+ continue;
+ };
+ if entry.path().is_file() && entry.file_name().to_string_lossy().starts_with(filename) {
+ if let Some(path_str) = entry.path().to_str() {
+ println!("{}", path_str);
+ print_file_and_handle_error(path_str);
+ }
+ }
+ }
+}
+
+// Capture modem stat log if it exists
+fn modem_stat() {
+ println!("------ Modem Stat ------");
+ print_file_and_handle_error(MODEM_STAT);
+ println!();
+}
+
+// Capture crash signatures from all modem crashes
+fn modem_ssr_history() {
+ println!("------ Modem SSR history ------");
+ print_matching_files_in_dir(SSRDUMP_DIR, "crashinfo_modem");
+ println!();
+}
+
+// Capture rfsd error logs from all existing log files
+fn rfsd_error_log() {
+ println!("------ RFSD error log ------");
+ print_matching_files_in_dir(RFSD_ERR_LOG_DIR, "rfslog");
+ println!();
+}
+
+// Capture modem wakeup events if the sysfs attribute exists
+fn wakeup_events() {
+ println!("------ Wakeup event counts ------");
+ print_file_and_handle_error(WAKEUP_EVENTS);
+ println!();
+}
+
+// Capture kernel driver logbuffer if it exists
+fn cpif_logbuffer() {
+ println!("------ CPIF Logbuffer ------");
+ print_file_and_handle_error(CPIF_LOGBUFFER);
+ println!();
+}
+
+// Capture modem pcie stats if the sysfs attribute exists
+fn pcie_event_stats() {
+ println!("------ PCIe event stats ------");
+ print_file_and_handle_error(PCIE_EVENT_STATS);
+ println!();
+}
+
+fn main() {
+ modem_stat();
+ modem_ssr_history();
+ rfsd_error_log();
+ wakeup_events();
+ cpif_logbuffer();
+ pcie_event_stats();
+}