nfstest_sparse (1) - Linux Manuals

nfstest_sparse: Sparse file tests

NAME

nfstest_sparse - Sparse file tests

SYNOPSIS

nfstest_sparse --server <server> [options]

DESCRIPTION

Verify correct functionality of sparse files. These are files which have unallocated or uninitialized data blocks as holes. The new NFSv4.2 operation SEEK is used to search for the next hole or data segment in a file.

Basic tests verify the SEEK operation returns the correct offset of the next hole or data with respect to the starting offset given to the seek system call. Verify the SEEK operation is sent to the server with the correct stateid as a READ call. All files have a virtual hole at the end of the file so when searching for the next hole, even if the file does not have a hole, it returns the size of the file.

Some tests include testing at the protocol level by taking a packet trace and inspecting the actual packets sent to the server.

Negative tests include trying to SEEK starting from an offset beyond the end of the file.

OPTIONS

--version

show program's version number and exit

-h, --help

show this help message and exit

-f FILE, --file=FILE

File where options are specified besides the system wide file /etc/nfstest, user wide file $HOME/.nfstest or in the current directory .nfstest file

NFS specific options:

-s SERVER, --server=SERVER

Server name or IP address

-e EXPORT, --export=EXPORT

Exported file system to mount [default: '/']

--nfsversion=NFSVERSION

NFS version, e.g., 3, 4, 4.1, etc. [default: 4.2]

-m MTPOINT, --mtpoint=MTPOINT

Mount point [default: '/mnt/t']

-p PORT, --port=PORT

NFS server port [default: 2049]

--proto=PROTO

NFS protocol name [default: 'tcp']

--sec=SEC

Security flavor [default: 'sys']

-o MTOPTS, --mtopts=MTOPTS

Mount options [default: 'hard,rsize=4096,wsize=4096']

--datadir=DATADIR

Data directory where files are created, directory is created on the mount point [default: '']

Logging options:

-v VERBOSE, --verbose=VERBOSE

Verbose level for debug messages [default: 'none']

--tverbose=TVERBOSE

Verbose level for test messages [default: '1']

--createlog

Create log file

--warnings

Display warnings

--tag=TAG

Informational tag, it is displayed as an INFO message [default: '']

Packet trace options:

--createtraces

Create a packet trace for each test

--tbsize=TBSIZE

Capture buffer size for tcpdump [default: '50000']

--trcdelay=TRCDELAY

Seconds to delay before stopping packet trace [default: 0.0]

--keeptraces

Do not remove any trace files [default: remove trace files if no errors]

--rmtraces

Remove trace files [default: remove trace files if no errors]

-i INTERFACE, --interface=INTERFACE

Device interface [default: automatically selected]

File options:

--nfiles=NFILES

Number of files to create [default: 2]

--filesize=FILESIZE

File size to use for test files [default: 65536]

--rsize=RSIZE

Read size to use when reading files [default: 4096]

--wsize=WSIZE

Write size to use when writing files [default: 4096]

--iodelay=IODELAY

Seconds to delay I/O operations [default: 0.1]

--offset-delta=OFFSET_DELTA

Read/Write offset delta [default: 4096]

Path options:

--sudo=SUDO

Full path of binary for sudo [default: '/usr/bin/sudo']

--tcpdump=TCPDUMP

Full path of binary for tcpdump [default: '/usr/sbin/tcpdump']

--iptables=IPTABLES

Full path of binary for iptables [default: '/sbin/iptables']

--messages=MESSAGES

Full path of log messages file [default: '/var/log/messages']

--tmpdir=TMPDIR

Temporary directory [default: '/tmp']

Debug options:

--nocleanup

Do not cleanup created files

--bugmsgs=BUGMSGS

File containing test messages to mark as bugs if they failed

--ignore

Ignore all bugs given by bugmsgs

--nomount

Do not mount server and run the tests on local disk space

--basename=BASENAME

Base name for all files and logs [default: automatically generated]

--nfsdebug=NFSDEBUG

Set NFS kernel debug flags and save log messages [default: '']

--rpcdebug=RPCDEBUG

Set RPC kernel debug flags and save log messages [default: '']

Test options:

--runtest=RUNTEST

Comma separated list of tests to run, if list starts with a '^' then all tests are run except the ones listed [default: 'all']

TESTS

seek

Run all SEEK tests: seek01, seek02, seek03, seek04

seek01

Verify SEEK succeeds searching for the next data

seek02

Verify SEEK succeeds searching for the next hole

seek03

Verify SEEK searching for next data fails with ENXIO when offset is beyond the end of the file

seek04

Verify SEEK searching for next hole fails with ENXIO when offset is beyond the end of the file

EXAMPLES

The only required option is --server
$ nfstest_sparse --server 192.168.0.11

NOTES

The user id in the local host must have access to run commands as root using the 'sudo' command without the need for a password.

Valid only for NFS version 4.2 and above.

BUGS

No known bugs.

AUTHOR

Jorge Mora (mora [at] netapp.com)