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.\" Copyright (c) 2016, 2022, Oracle and/or its affiliates.
.TH nfssnoop 8 "26 Aug 2022" "Oracle Solaris 11.4" "System Administration Commands"
.SH NAME
nfssnoop \- construct dtrace scripts to inspect NFS requests or responses
.SH SYNOPSIS

.LP
.nf
nfssnoop [-ln] [-o output_file] [-s script_file]
     [-x dtrace_options] operations
.fi
.SH DESCRIPTION
.sp
.LP
The \fBnfssnoop\fR command is a debugging tool based on a collection of \fBdtrace\fR command scripts.
.sp
.LP
The \fBnfssnoop\fR command displays each request or response pair in multi-line forms and output. For more information on debugging, see the \fBdtrace\fR(8) man page.
.SH OPTIONS
.sp
.LP
The following options are supported:

.sp
.ne 2
.mk
.na
\fB\fB-l\fR\fR
.ad
.br
.sp .6
.RS 4n
List traceable NFS operations
.RE

.sp
.ne 2
.mk
.na
\fB\fB-n\fR\fR
.ad
.br
.sp .6
.RS 4n
Constructs the \fBdtrace\fR file and does not run it
.RE

.sp
.ne 2
.mk
.na
\fB\fB-o\fR \fIoutput_file\fR\fR
.ad
.br
.sp .6
.RS 4n
Redirects output to file specified by \fBoutput_file\fR
.RE

.sp
.ne 2
.mk
.na
\fB\fB-s\fR \fIscript_file\fR\fR
.ad
.br
.sp .6
.RS 4n
Saves constructed script to file specified by \fBscript_file\fR
.RE

.sp
.ne 2
.mk
.na
\fB\fB-x\fR \fIdtrace_options\fR\fR
.ad
.br
.sp .6
.RS 4n
Adds additional \fBdtrace\fR command line options. Each occurrence can add one option
.RE

.sp
.ne 2
.mk
.na
\fB\fB-d\fR \fIdetail_type\fR\fR
.ad
.br
.sp .6
.RS 4n
Adds extra detail of the type named. The only \fBdetail_type\fR currently implemented is "\fBrdma\fR", which adds tracing of lower-level RDMA messages associated with the NFS protocol operations traced
.RE

.sp
.ne 2
.mk
.na
\fB\fB-e\fR\fR
.ad
.br
.sp .6
.RS 4n
Adds tracing for errors which occur outside the processing of individual NFS operations
.RE

.SH OPERANDS
.sp
.LP
The following operands are supported:

.sp
.ne 2
.mk
.na
\fB\fIoperations\fR\fR
.ad
.RS 14n
.rt
List of operations to trace. Use the -l option to get a list of supported operations.
.sp
For example, \fBnfssnoop open close delete\fR traces basic delegation information.
.RE

.SH EXAMPLES
.LP
\fBExample 1\fR 
Tracing NFSv4 Open and Close Operations:

.sp
.LP
The following example traces the NFSv4 open and close operations.

.sp
.in +2
.nf
example# \fB/usr/lib/nfs/nfssnoop open close\fR
12:25:32.178 116498899  OPEN_START proto=rdma remoteIP=10.135.197.59
12:25:32.178 116498899  OPEN_START_CONT seqid=8 share_access=1 share
12:25:32.178 116498899  OPEN_START_CONT attrmask=0.0 attrlist_len=0 
12:25:32.178 116498899  OPEN_START_CONT file=libc.so
12:25:32.178 116498899  OPEN_DONE status#=10011 status=EXPIRED
12:25:32.178 116498899  OPEN_DONE_CONT why=not-wanted server_will_pu
12:25:32.192 200384979  CLOSE_START proto=rdma remoteIP=10.135.197.5
12:25:32.192 200384979  CLOSE_START_CONT stateid.seqid=0x2 stateid.o
12:25:32.192 200384979  CLOSE_DONE status#=0 status=OK
12:25:32.192 200384979  CLOSE_DONE_CONT stateid.seqid=0x3 stateid.ot
.fi
.in -2
.sp

.LP
\fBExample 2\fR 
Constructing a Script to Trace Read and Write Operations

.sp
.LP
The following example constructs a script to trace read and write operations.

.sp
.in +2
.nf
example# \fB/usr/lib/nfs/nfssnoop -n -s /path/generated_script.d read write\fR
.fi
.in -2
.sp

.SH EXIT STATUS
.sp
.LP
The following exit values are returned:

.sp
.ne 2
.mk
.na
\fB\fB0\fR\fR
.ad
.RS 6n
.rt
Successful completion
.RE

.sp
.ne 2
.mk
.na
\fB\fB>0\fR\fR
.ad
.RS 6n
.rt
An error occurred
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp
.TS
tab(
) box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPE
ATTRIBUTE VALUE
_
Availability
system/file-system/nfs
.TE
.sp
.SH SEE ALSO
.sp
.LP
\fBzones\fR(7), \fBdtrace\fR(8)