use std::ffi::{OsStr, OsString};
use std::os::unix::ffi::OsStringExt;
use std::path::{Path, PathBuf};
use std::ptr::null_mut;
use libc::c_char;
use super::ffi;
use super::utils::c_buf_to_utf8_str;
use crate::{Disk, DiskKind, DiskRefreshKind, DiskUsage};
#[derive(Debug)]
pub(crate) struct DiskInner {
name: OsString,
c_mount_point: Vec<c_char>,
dev_id: Vec<c_char>,
mount_point: PathBuf,
total_space: u64,
available_space: u64,
pub(crate) file_system: OsString,
is_removable: bool,
is_read_only: bool,
read_bytes: u64,
old_read_bytes: u64,
written_bytes: u64,
old_written_bytes: u64,
updated: bool,
}
#[cfg(test)]
impl Default for DiskInner {
fn default() -> Self {
Self {
name: OsString::new(),
c_mount_point: Vec::new(),
dev_id: Vec::new(),
mount_point: PathBuf::new(),
total_space: 0,
available_space: 0,
file_system: OsString::new(),
is_removable: false,
is_read_only: false,
read_bytes: 0,
old_read_bytes: 0,
written_bytes: 0,
old_written_bytes: 0,
updated: false,
}
}
}
impl DiskInner {
pub(crate) fn kind(&self) -> DiskKind {
DiskKind::Unknown(-1)
}
pub(crate) fn name(&self) -> &OsStr {
&self.name
}
pub(crate) fn file_system(&self) -> &OsStr {
&self.file_system
}
pub(crate) fn mount_point(&self) -> &Path {
&self.mount_point
}
pub(crate) fn total_space(&self) -> u64 {
self.total_space
}
pub(crate) fn available_space(&self) -> u64 {
self.available_space
}
pub(crate) fn is_removable(&self) -> bool {
self.is_removable
}
pub(crate) fn is_read_only(&self) -> bool {
self.is_read_only
}
pub(crate) fn refresh_specifics(&mut self, refresh_kind: DiskRefreshKind) -> bool {
refresh_disk(self, refresh_kind)
}
pub(crate) fn usage(&self) -> DiskUsage {
DiskUsage {
read_bytes: self.read_bytes.saturating_sub(self.old_read_bytes),
total_read_bytes: self.read_bytes,
written_bytes: self.written_bytes.saturating_sub(self.old_written_bytes),
total_written_bytes: self.written_bytes,
}
}
fn update_old(&mut self) {
self.old_read_bytes = self.read_bytes;
self.old_written_bytes = self.written_bytes;
}
}
impl crate::DisksInner {
pub(crate) fn new() -> Self {
Self {
disks: Vec::with_capacity(2),
}
}
pub(crate) fn refresh_specifics(
&mut self,
remove_not_listed_disks: bool,
refresh_kind: DiskRefreshKind,
) {
unsafe { get_all_list(&mut self.disks, remove_not_listed_disks, refresh_kind) }
}
pub(crate) fn list(&self) -> &[Disk] {
&self.disks
}
pub(crate) fn list_mut(&mut self) -> &mut [Disk] {
&mut self.disks
}
}
unsafe fn get_statvfs(
c_mount_point: &[c_char],
vfs: &mut libc::statvfs,
) -> Option<(u64, u64, bool)> {
if unsafe { libc::statvfs(c_mount_point.as_ptr() as *const _, vfs as *mut _) < 0 } {
sysinfo_debug!("statvfs failed");
None
} else {
let block_size: u64 = vfs.f_frsize as _;
Some((
vfs.f_blocks.saturating_mul(block_size),
vfs.f_favail.saturating_mul(block_size),
(vfs.f_flag & libc::ST_RDONLY) != 0,
))
}
}
fn refresh_disk(disk: &mut DiskInner, refresh_kind: DiskRefreshKind) -> bool {
if refresh_kind.storage() {
unsafe {
let mut vfs: libc::statvfs = std::mem::zeroed();
if let Some((total_space, available_space, is_read_only)) =
get_statvfs(&disk.c_mount_point, &mut vfs)
{
disk.total_space = total_space;
disk.available_space = available_space;
disk.is_read_only = is_read_only;
}
}
}
if refresh_kind.io_usage() {
unsafe {
refresh_disk_io(&mut [disk]);
}
}
true
}
trait GetValues {
fn update_old(&mut self);
fn get_read(&mut self) -> &mut u64;
fn get_written(&mut self) -> &mut u64;
fn dev_id(&self) -> &[c_char];
}
impl GetValues for crate::Disk {
fn update_old(&mut self) {
self.inner.update_old()
}
fn get_read(&mut self) -> &mut u64 {
self.inner.get_read()
}
fn get_written(&mut self) -> &mut u64 {
self.inner.get_written()
}
fn dev_id(&self) -> &[c_char] {
self.inner.dev_id()
}
}
impl GetValues for &mut DiskInner {
fn update_old(&mut self) {
self.old_read_bytes = self.read_bytes;
self.old_written_bytes = self.written_bytes;
}
fn get_read(&mut self) -> &mut u64 {
&mut self.read_bytes
}
fn get_written(&mut self) -> &mut u64 {
&mut self.written_bytes
}
fn dev_id(&self) -> &[c_char] {
self.dev_id.as_slice()
}
}
impl GetValues for DiskInner {
fn update_old(&mut self) {
self.old_read_bytes = self.read_bytes;
self.old_written_bytes = self.written_bytes;
}
fn get_read(&mut self) -> &mut u64 {
&mut self.read_bytes
}
fn get_written(&mut self) -> &mut u64 {
&mut self.written_bytes
}
fn dev_id(&self) -> &[c_char] {
self.dev_id.as_slice()
}
}
fn same_name(dev_id: &[c_char], drive_name: &[c_char]) -> bool {
for (c1, c2) in dev_id.iter().zip(drive_name.iter()) {
if c1 != c2 {
return false;
}
}
true
}
unsafe fn refresh_disk_io<T: GetValues>(disks: &mut [T]) {
const IO_SYSCTL_SIZE: usize = std::mem::size_of::<ffi::io_sysctl>();
let mib = &[ffi::CTL_HW, ffi::HW_IOSTATS, IO_SYSCTL_SIZE as libc::c_int];
let mut size: libc::size_t = 0;
unsafe {
if !super::utils::get_sysctl_raw(mib, null_mut(), &mut size) {
sysinfo_debug!("failed to get iostats info");
return;
}
let mut nb_drives = size as usize / IO_SYSCTL_SIZE;
if nb_drives < 1 {
sysinfo_debug!("no drive");
return;
}
let mut drives: Vec<ffi::io_sysctl> = Vec::with_capacity(nb_drives);
if !super::utils::get_sysctl_raw(mib, drives.as_mut_ptr() as *mut _, &mut size) {
sysinfo_debug!("failed to get iostats drives");
return;
}
nb_drives = size as usize / IO_SYSCTL_SIZE;
drives.set_len(nb_drives);
for drive in drives {
if let Some(disk) = disks
.iter_mut()
.find(|disk| same_name(disk.dev_id(), &drive.name))
{
disk.update_old();
*disk.get_read() = drive.rbytes;
*disk.get_written() = drive.wbytes;
}
}
}
}
fn get_dev_id(path: &[c_char]) -> Vec<c_char> {
let mut start = None;
let mut end = None;
for (pos, c) in path.iter().enumerate().rev() {
if *c == b'/' as _ {
start = Some(pos + 1);
break;
} else if end.is_none() && *c != 0 {
end = Some(pos);
}
}
let start = start.unwrap_or(0);
match end {
Some(end) => path[start..=end].to_vec(),
None => path[start..].to_vec(),
}
}
pub unsafe fn get_all_list(
container: &mut Vec<Disk>,
remove_not_listed_disks: bool,
refresh_kind: DiskRefreshKind,
) {
let mut mnt_buf: *mut libc::statvfs = null_mut();
let count = unsafe { libc::getmntinfo(&mut mnt_buf, libc::MNT_WAIT) };
if count < 1 {
return;
}
let mnt_buf: &[libc::statvfs] = unsafe { std::slice::from_raw_parts(mnt_buf as _, count as _) };
for fs_info in mnt_buf {
if (fs_info.f_flag & libc::MNT_IGNORE as u64) != 0 {
continue;
}
if (fs_info.f_flag & libc::MNT_LOCAL as u64) == 0 {
continue;
}
if fs_info.f_mntfromname[0] == 0 || fs_info.f_mntonname[0] == 0 {
continue;
}
let fs_type: Vec<u8> = {
let len = fs_info
.f_fstypename
.iter()
.position(|x| *x == 0)
.unwrap_or(fs_info.f_fstypename.len());
fs_info.f_fstypename[..len]
.iter()
.map(|c| *c as u8)
.collect()
};
match &fs_type[..] {
b"autofs" | b"devfs" | b"linprocfs" | b"procfs" | b"fdesckfs" | b"tmpfs"
| b"linsysfs" | b"kernfs" | b"ptyfs" => {
sysinfo_debug!(
"Memory filesystem `{:?}`, ignoring it.",
c_buf_to_utf8_str(&fs_info.f_fstypename),
);
continue;
}
_ => {}
}
let mount_point = match c_buf_to_utf8_str(&fs_info.f_mntonname) {
Some(m) => m,
None => {
sysinfo_debug!("Cannot get disk mount point, ignoring it.");
continue;
}
};
if mount_point == "/boot/efi" {
continue;
}
let name = if mount_point == "/" {
OsString::from("root")
} else {
OsString::from(mount_point)
};
if let Some(disk) = container.iter_mut().find(|d| {
d.inner.name == name
&& d.inner
.file_system
.as_encoded_bytes()
.iter()
.zip(fs_type.iter())
.all(|(a, b)| a == b)
}) {
refresh_disk(&mut disk.inner, refresh_kind.without_io_usage());
disk.inner.updated = true;
} else {
let is_removable = if refresh_kind.storage() {
[b"USB", b"usb"].iter().any(|b| *b == &fs_type[..])
|| fs_type.starts_with(b"/dev/cd")
} else {
false
};
let mut disk = DiskInner {
name,
c_mount_point: fs_info.f_mntonname.to_vec(),
dev_id: get_dev_id(&fs_info.f_mntfromname),
mount_point: PathBuf::from(mount_point),
total_space: 0,
available_space: 0,
file_system: OsString::from_vec(fs_type),
is_removable,
is_read_only: false,
read_bytes: 0,
old_read_bytes: 0,
written_bytes: 0,
old_written_bytes: 0,
updated: true,
};
refresh_disk(&mut disk, refresh_kind.without_io_usage());
container.push(Disk { inner: disk });
}
}
if remove_not_listed_disks {
container.retain_mut(|disk| {
if !disk.inner.updated {
return false;
}
disk.inner.updated = false;
true
});
} else {
for c in container.iter_mut() {
c.inner.updated = false;
}
}
if refresh_kind.io_usage() {
unsafe {
refresh_disk_io(container);
}
}
}