src-test/bin/dd, branch main

Add O_DIRECT flag to DD for cache bypass

2020-06-04T20:47:11Z

FreeBSD DD utility has not had support for the O_DIRECT flag, which is useful to bypass local caching, e.g. for unconditionally issuing NFS IO requests during testing. Reviewed by: rgrimes (mentor) Approved by: rgrimes (mentor, blanket) MFC after: 3 weeks Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D25066

Add iflag=fullblock to dd

2019-09-30T22:00:48Z

Normally, count=n means read(2) will be called n times on the input to dd. If the read() returns short, as may happen when reading from a pipe, fewer bytes will be copied from the input. With conv=sync the buffer is padded with zeros to fill the rest of the block. iflag=fullblock causes dd to continue reading until the block is full, so that count=n means n full blocks are copied. This flag is compatible with illumos and GNU dd and is used in the ZFS test suite. Submitted by: Ryan Moeller Reviewed by: manpages, mmacy@ MFC after: 1 week Sponsored by: iXsystems, Inc. Differential Revision: https://reviews.freebsd.org/D21441

Add oflag=fsync and oflag=sync capability to dd

2019-09-30T21:56:42Z

Sets the O_FSYNC flag on the output file. oflag=fsync and oflag=sync are synonyms just as O_FSYNC and O_SYNC are synonyms. This functionality is intended to improve portability of dd commands in the ZFS test suite. Submitted by: Ryan Moeller Reviewed by: manpages, mmacy@ MFC after: 1 week Sponsored by: iXsytems, Inc. Differential Revision: https://reviews.freebsd.org/D21422

dd: Check result of close(2) for errors

2019-09-30T21:53:26Z

close(2) can return errors from previous operations which should not be ignored. PR: 229616 Submitted by: Thomas Hurst Reported by: Thomas Hurst Reviewed by: mmacy@ Obtained from: Ryan Moeller MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D21376

Add conv=fdatasync flag to dd

2019-09-30T21:48:12Z

The fdatasync flag performs an fdatasync(2) on the output file before closing it. This will be useful for the ZFS test suite. Submitted by: Ryan Moeller Reviewed by: manpages, mmacy@ MFC after: 1 week Sponsored by: iXSystems, Inc. Differential Revision: https://reviews.freebsd.org/D21373

Add conv=fsync flag to dd

2019-09-03T18:35:55Z

The fsync flag performs an fsync(2) on the output file before closing it. This will be useful for the ZFS test suite. Submitted by: ryan@ixsystems.com Reviewed by: jilles@, imp@ MFC after: 1 week Sponsored by: iXsystems, Inc.

.Xr trim(8) from dd(1).

2019-03-26T15:44:06Z

MFC after: 2 weeks Sponsored by: DARPA, AFRL

Replace hand-crafted naive byte-by-byte zero block detection routine

2018-11-29T19:28:01Z

with macro based around memcmp(). The latter is expected to be some 8 times faster on a modern 64-bit architectures. In practice, throughput of doing conv=sparse from /dev/zero to /dev/null went up some 5-fold here from 1.9GB/sec to 9.7GB/sec with this change (bs=128k). MFC after: 2 weeks

capsicum: use a new capsicum helpers in tools

2018-11-04T19:24:49Z

Use caph_{rights,ioctls,fcntls}_limit to simplify the code.

dd(1): Correct padding in status=progress

2018-09-13T14:54:46Z

Output padding is specified via outlen, which is set using the return value of fprintf. Because it's printing that padding plus a trailing byte, it grows by one each iteration rather than reflecting actual length. Additionally, iec was sized improperly for scaling up similarly to si. Fixing this revealed that the humanize_number(3) call to populate persec was using the wrong width. Submitted by: Thomas Hurst Reviewed by: imp Approved by: re (kib) Differential Revision: https://reviews.freebsd.org/D16960