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src/tools/disks/zfs.rs: parse more infos (dedup, fragmentation, health)

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This commit is contained in:
Dietmar Maurer 2020-06-16 11:47:10 +02:00
parent 58c51cf3d9
commit 3378fd9fe5
1 changed files with 41 additions and 10 deletions
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51
src/tools/disks/zfs.rs
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@ -8,7 +8,7 @@ use lazy_static::lazy_static;
use nom::{
error::VerboseError,
bytes::complete::{take_while, take_while1, take_till, take_till1},
combinator::{map_res, all_consuming, recognize},
combinator::{map_res, all_consuming, recognize, opt},
sequence::{preceded, tuple},
character::complete::{space1, digit1, char, line_ending},
multi::{many0, many1},
@ -32,11 +32,14 @@ pub struct ZFSPoolUsage {
total: u64,
used: u64,
free: u64,
dedup: f64,
fragmentation: u64,
}
#[derive(Debug)]
pub struct ZFSPoolStatus {
name: String,
health: String,
usage: Option<ZFSPoolUsage>,
devices: Vec<String>,
}
@ -91,6 +94,11 @@ fn multispace1(i: &str) -> IResult<&str, &str> {
take_while1(|c| c == ' ' || c == '\t')(i)
}
/// Recognizes one or more non-whitespace-characters
fn notspace1(i: &str) -> IResult<&str, &str> {
take_while1(|c| !(c == ' ' || c == '\t' || c == '\n'))(i)
}
fn parse_optional_u64(i: &str) -> IResult<&str, Option<u64>> {
if i.starts_with('-') {
Ok((&i[1..], None))
@ -100,6 +108,15 @@ fn parse_optional_u64(i: &str) -> IResult<&str, Option<u64>> {
}
}
fn parse_optional_f64(i: &str) -> IResult<&str, Option<f64>> {
if i.starts_with('-') {
Ok((&i[1..], None))
} else {
let (i, value) = nom::number::complete::double(i)?;
Ok((i, Some(value)))
}
}
fn parse_pool_device(i: &str) -> IResult<&str, String> {
let (i, (device, _, _rest)) = tuple((
preceded(multispace1, take_till1(|c| c == ' ' || c == '\t')),
@ -111,24 +128,38 @@ fn parse_pool_device(i: &str) -> IResult<&str, String> {
}
fn parse_pool_header(i: &str) -> IResult<&str, ZFSPoolStatus> {
let (i, (text, total, used, free, _, _eol)) = tuple((
take_while1(|c| char::is_alphanumeric(c)),
preceded(multispace1, parse_optional_u64),
preceded(multispace1, parse_optional_u64),
preceded(multispace1, parse_optional_u64),
preceded(space1, take_till(|c| c == '\n')),
// name, size, allocated, free, checkpoint, expandsize, fragmentation, capacity, dedupratio, health, altroot.
let (i, (text, total, used, free, _, _,
fragmentation, _, dedup, health,
_, _eol)) = tuple((
take_while1(|c| char::is_alphanumeric(c)), // name
preceded(multispace1, parse_optional_u64), // size
preceded(multispace1, parse_optional_u64), // allocated
preceded(multispace1, parse_optional_u64), // free
preceded(multispace1, notspace1), // checkpoint
preceded(multispace1, notspace1), // expandsize
preceded(multispace1, parse_optional_u64), // fragmentation
preceded(multispace1, notspace1), // capacity
preceded(multispace1, parse_optional_f64), // dedup
preceded(multispace1, notspace1), // health
opt(preceded(space1, take_till(|c| c == '\n'))), // skip rest
line_ending,
))(i)?;
let status = if let (Some(total), Some(used), Some(free)) = (total, used, free) {
let status = if let (Some(total), Some(used), Some(free), Some(fragmentation), Some(dedup)) = (total, used, free, fragmentation, dedup) {
ZFSPoolStatus {
name: text.into(),
usage: Some(ZFSPoolUsage { total, used, free }),
health: health.into(),
usage: Some(ZFSPoolUsage { total, used, free, fragmentation, dedup }),
devices: Vec::new(),
}
} else {
ZFSPoolStatus {
name: text.into(), usage: None, devices: Vec::new(),
name: text.into(),
health: health.into(),
usage: None,
devices: Vec::new(),
}
};