blob: 8053cc11fbd1c471a618bd7e155aa6c42d947d76 (
plain)
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
|
'\" t
.\" Title: nvme-get-property
.\" Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\" Date: 02/14/2024
.\" Manual: NVMe Manual
.\" Source: NVMe
.\" Language: English
.\"
.TH "NVME\-GET\-PROPERTY" "1" "02/14/2024" "NVMe" "NVMe Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
nvme-get-property \- Reads and shows the defined NVMe controller property for NVMe over Fabric
.SH "SYNOPSIS"
.sp
.nf
\fInvme get\-property\fR <device> [\-\-offset=<offset> | \-O <offset>]
[\-\-human\-readable | \-H]
[\-\-output\-format=<fmt> | \-o <fmt>] [\-\-verbose | \-v]
.fi
.SH "DESCRIPTION"
.sp
Reads and shows the defined NVMe controller property for NVMe over Fabric\&.
.SH "OPTIONS"
.PP
\-O, \-\-offset
.RS 4
The offset of the property\&. One of CAP=0x0, VS=0x8, CC=0x14, CSTS=0x1c, NSSR=0x20
.RE
.PP
\-H
.RS 4
\-\-human\-readable: Show the fields packed in the property
.RE
.PP
\-o <fmt>, \-\-output\-format=<fmt>
.RS 4
Set the reporting format to
\fInormal\fR,
\fIjson\fR
or
\fIbinary\fR\&. Only one output format can be used at a time\&.
.RE
.PP
\-v, \-\-verbose
.RS 4
Increase the information detail in the output\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The following will run the get\-property command with offset 0
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme get\-property /dev/nvme0 \-\-offset=0x0 \-\-human\-readable
.fi
.if n \{\
.RE
.\}
.RE
.SH "BUGS"
.sp
Currently the CAP value is truncated to 32 bits due to a limitation in the ioctl interface\&.
.sp
In a recent enough kernel, the 64 bit value is shown in kernel traces\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
First enable traces by this command
.sp
.if n \{\
.RS 4
.\}
.nf
# echo 1 > /sys/kernel/debug/tracing/events/nvme/enable
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Then look for NVMe Fabrics command (0x7f) at trace
.sp
.if n \{\
.RS 4
.\}
.nf
/sys/kernel/debug/tracing/trace
.fi
.if n \{\
.RE
.\}
.RE
.SH "NVME"
.sp
Part of the nvme\-user suite
|
