1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
extern crate libzfs_sys as sys;
use libzfs_error::{LibZfsError, Result};
use nvpair;
use std::ffi::CStr;
use std::io::{Error, ErrorKind};
#[derive(Debug, PartialEq, Serialize, Deserialize)]
pub enum VDev {
Mirror {
children: Vec<VDev>,
is_log: Option<bool>,
},
RaidZ {
children: Vec<VDev>,
},
Replacing {
children: Vec<VDev>,
},
Root {
children: Vec<VDev>,
spares: Vec<VDev>,
cache: Vec<VDev>,
},
Disk {
guid: Option<u64>,
state: String,
path: String,
dev_id: Option<String>,
phys_path: Option<String>,
whole_disk: Option<bool>,
is_log: Option<bool>,
},
File {
guid: Option<u64>,
state: String,
path: String,
is_log: Option<bool>,
},
}
pub fn enumerate_vdev_tree(tree: &nvpair::NvList) -> Result<VDev> {
let tmp = tree.lookup_string(sys::zpool_config_type())?;
let x = tmp.as_bytes_with_nul();
fn get_children(tree: &nvpair::NvList) -> Result<Vec<VDev>> {
tree.lookup_nv_list_array(sys::zpool_config_children())?
.iter()
.map(enumerate_vdev_tree)
.collect()
}
fn get_spares(tree: &nvpair::NvList) -> Result<Vec<VDev>> {
let spares = tree.lookup_nv_list_array(sys::zpool_config_spares());
match spares {
Ok(x) => x.iter().map(enumerate_vdev_tree).collect(),
Err(_) => Ok(vec![]),
}
}
fn get_cache(tree: &nvpair::NvList) -> Result<Vec<VDev>> {
let cache = tree.lookup_nv_list_array(sys::zpool_config_l2cache());
match cache {
Ok(x) => x.iter().map(enumerate_vdev_tree).collect(),
Err(_) => Ok(vec![]),
}
}
fn lookup_tree_str(tree: &nvpair::NvList, name: String) -> Result<Option<String>> {
let x = tree.lookup_string(name);
match x {
Ok(x) => Ok(Some(x.into_string()?)),
Err(_) => Ok(None),
}
}
fn lookup_is_log(tree: &nvpair::NvList) -> Option<bool> {
tree.lookup_uint64(sys::zpool_config_is_log())
.map(|x| x == 1)
.ok()
}
fn lookup_guid(tree: &nvpair::NvList) -> Option<u64> {
tree.lookup_uint64(sys::zpool_config_guid()).ok()
}
fn lookup_state(tree: &nvpair::NvList) -> Result<String> {
let vdev_stats = tree
.lookup_uint64_array(sys::zpool_config_vdev_stats())
.map(sys::to_vdev_stat)?;
let state = unsafe {
let s = sys::zpool_state_to_name(
sys::to_vdev_state(vdev_stats.vs_state as u32).ok_or(Error::new(
ErrorKind::NotFound,
"vs_state not in enum range",
))?,
sys::to_vdev_aux(vdev_stats.vs_aux as u32)
.ok_or(Error::new(ErrorKind::NotFound, "vs_aux not in enum range"))?,
);
CStr::from_ptr(s)
};
state.to_owned().into_string().map_err(LibZfsError::from)
}
match x {
x if x == sys::VDEV_TYPE_DISK => {
let path = tree
.lookup_string(sys::zpool_config_path())?
.into_string()?;
let dev_id = lookup_tree_str(tree, sys::zpool_config_dev_id())?;
let phys_path = lookup_tree_str(tree, sys::zpool_config_phys_path())?;
let whole_disk = tree
.lookup_uint64(sys::zpool_config_whole_disk())
.map(|x| x == 1)
.ok();
Ok(VDev::Disk {
guid: lookup_guid(tree),
state: lookup_state(tree)?,
path,
dev_id,
phys_path,
whole_disk,
is_log: lookup_is_log(tree),
})
}
x if x == sys::VDEV_TYPE_FILE => {
let path = tree
.lookup_string(sys::zpool_config_path())?
.into_string()?;
Ok(VDev::File {
guid: lookup_guid(tree),
state: lookup_state(tree)?,
path,
is_log: lookup_is_log(tree),
})
}
x if x == sys::VDEV_TYPE_MIRROR => {
let children = get_children(tree)?;
let is_log = tree
.lookup_uint64(sys::zpool_config_is_log())
.map(|x| x == 1)
.ok();
Ok(VDev::Mirror { children, is_log })
}
x if x == sys::VDEV_TYPE_RAIDZ => {
let children = get_children(tree)?;
Ok(VDev::RaidZ { children })
}
x if x == sys::VDEV_TYPE_REPLACING => {
let children = get_children(tree)?;
Ok(VDev::Replacing { children })
}
x if x == sys::VDEV_TYPE_ROOT => {
let children = get_children(tree)?;
let spares = get_spares(tree)?;
let cache = get_cache(tree)?;
Ok(VDev::Root {
children,
spares,
cache,
})
}
_ => Err(LibZfsError::Io(Error::new(
ErrorKind::NotFound,
"hit unknown vdev type",
))),
}
}