Cross platform get_info

Signed-off-by: junxiang Mu <1948535941@qq.com>

ecstore/src/utils/os/linux.rs

@@ -0,0 +1,84 @@
+use nix::sys::{
+    stat::{major, minor, stat},
+    statfs::{statfs, FsType},
+};
+
+use crate::{
+    disk::Info,
+    error::{Error, Result},
+};
+
+use lazy_static::lazy_static;
+use std::collections::HashMap;
+
+lazy_static! {
+    static ref FS_TYPE_TO_STRING_MAP: HashMap<&'static str, &'static str> = {
+        let mut m = HashMap::new();
+        m.insert("1021994", "TMPFS");
+        m.insert("137d", "EXT");
+        m.insert("4244", "HFS");
+        m.insert("4d44", "MSDOS");
+        m.insert("52654973", "REISERFS");
+        m.insert("5346544e", "NTFS");
+        m.insert("58465342", "XFS");
+        m.insert("61756673", "AUFS");
+        m.insert("6969", "NFS");
+        m.insert("ef51", "EXT2OLD");
+        m.insert("ef53", "EXT4");
+        m.insert("f15f", "ecryptfs");
+        m.insert("794c7630", "overlayfs");
+        m.insert("2fc12fc1", "zfs");
+        m.insert("ff534d42", "cifs");
+        m.insert("53464846", "wslfs");
+        m
+    };
+}
+
+fn get_fs_type(ftype: FsType) -> String {
+    let binding = format!("{:?}", ftype);
+    let fs_type_hex = binding.as_str();
+    match FS_TYPE_TO_STRING_MAP.get(fs_type_hex) {
+        Some(fs_type_string) => fs_type_string.to_string(),
+        None => "UNKNOWN".to_string(),
+    }
+}
+
+pub fn get_info(path: &str, first_time: bool) -> Result<Info> {
+    let statfs = statfs(path)?;
+    let reserved_blocks = statfs.blocks_free() - statfs.blocks_available();
+    let mut info = Info {
+        total: statfs.block_size() as u64 * (statfs.blocks() - reserved_blocks),
+        free: statfs.blocks() as u64 * statfs.blocks_available(),
+        files: statfs.files(),
+        ffree: statfs.files_free(),
+        fstype: get_fs_type(statfs.filesystem_type()),
+        ..Default::default()
+    };
+
+    let stat = stat(path)?;
+    let dev_id = stat.st_dev as u64;
+    info.major = major(dev_id);
+    info.minor = minor(dev_id);
+
+    if info.free > info.total {
+        return Err(Error::from_string(format!(
+            "detected free space {} > total drive space {}, fs corruption at {}. please run 'fsck'",
+            info.free, info.total, path
+        )));
+    }
+
+    info.used = info.total - info.free;
+
+    if first_time {
+        // todo
+    }
+
+    Ok(info)
+}
+
+pub fn same_disk(disk1: &str, disk2: &str) -> Result<bool> {
+    let stat1 = stat(disk1)?;
+    let stat2 = stat(disk2)?;
+
+    Ok(stat1.st_dev == stat2.st_dev)
+}