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Subject: Re: safe versions of NFS
From:   hedrick@rutgers.edu
In-Reply-To: <EE014097-EDF8-484B-81DF-9E7012122BB9@rutgers.edu>
Date:   Tue, 13 Apr 2021 15:48:16 -0400
Cc:     Benjamin Coddington <bcodding@redhat.com>,
        Patrick Goetz <pgoetz@math.utexas.edu>,
        Linux NFS Mailing List <linux-nfs@vger.kernel.org>
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I have log entries for two Ubuntu 18 systems, but there=E2=80=99s no way to=
 get you a network trace for them without using a time machine.

> On Apr 13, 2021, at 3:40 PM, hedrick@rutgers.edu wrote:
>=20
> This is from Centos 7.9, with all file systems mounted via NFS 4.0 (in th=
eory =E2=80=94 there may be 4.2 that were unmounted =E2=80=94lazy):
>=20
> 463 106.786384244 172.17.141.150 -> 172.17.11.218 TCP 66 nlogin > nfs [AC=
K] Seq=3D39641 Ack=3D46777 Win=3D24576 Len=3D0 TSval=3D520277320 TSecr=3D14=
78982393
> 464 108.000270192 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xe696b554, [Check: RD LU MD XT DL]
> 465 108.000361904 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xd61aa475, [Check: RD LU MD XT DL]
> 466 108.000476711 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 464) ACCESS, [Allowed: RD LU MD XT DL]
> 467 108.000495290 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D9189 Ack=3D8761 Win=3D16605 Len=3D0 TSval=3D520278534 TSecr=3D147898=
3647
> 468 108.000591598 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 465) ACCESS, [Allowed: RD LU MD XT DL]
> 469 108.000608160 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D9189 Ack=3D8917 Win=3D16605 Len=3D0 TSval=3D520278534 TSecr=3D147898=
3647
> 470 118.952127064 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xef7d152e, [Check: RD LU MD XT DL]
> 471 118.952356881 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 470) ACCESS, [Allowed: RD LU MD XT DL]
> 472 118.952372768 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D9361 Ack=3D9073 Win=3D16605 Len=3D0 TSval=3D520289486 TSecr=3D147899=
4599
> 473 119.999835420 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0x94a968d5, [Check: RD LU MD XT DL]
> 474 120.000067817 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 473) ACCESS, [Allowed: RD LU MD XT DL]
> 475 120.000082882 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D9533 Ack=3D9229 Win=3D16605 Len=3D0 TSval=3D520290533 TSecr=3D147899=
5646
> 476 140.000587688 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xe696b554, [Check: RD LU MD XT DL]
> 477 140.000688677 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xd61aa475, [Check: RD LU MD XT DL]
> 478 140.000746915 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 476) ACCESS, [Allowed: RD LU MD XT DL]
> 479 140.000759241 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D9877 Ack=3D9385 Win=3D16605 Len=3D0 TSval=3D520310534 TSecr=3D147901=
5647
> 480 140.000830146 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 477) ACCESS, [Allowed: RD LU MD XT DL]
> 481 140.000836443 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D9877 Ack=3D9541 Win=3D16605 Len=3D0 TSval=3D520310534 TSecr=3D147901=
5647
> 482 148.442466129 172.17.141.150 -> 172.17.11.218 NFS 226 V4 Call RENEW C=
ID: 0x04da
> 483 148.442650203 172.17.11.218 -> 172.17.141.150 NFS 182 V4 Reply (Call =
In 482) RENEW
> 484 148.442664846 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D10037 Ack=3D9657 Win=3D16605 Len=3D0 TSval=3D520318976 TSecr=3D14790=
24089
> 485 149.953317362 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xef7d152e, [Check: RD LU MD XT DL]
> 486 149.953550872 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 485) ACCESS, [Allowed: RD LU MD XT DL]
> 487 149.953565993 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D10209 Ack=3D9813 Win=3D16605 Len=3D0 TSval=3D520320487 TSecr=3D14790=
25600
> 488 162.000571296 172.17.141.150 -> 172.17.11.218 NFS 226 V4 Call ACCESS =
FH: 0xcd1903be, [Check: RD LU MD XT DL]
> 489 162.000794395 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 488) ACCESS, [Access Denied: MD XT DL], [Allowed: RD LU]
> 490 162.000825598 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D10369 Ack=3D9969 Win=3D16605 Len=3D0 TSval=3D520332534 TSecr=3D14790=
37647
> 491 162.000998283 172.17.141.150 -> 172.17.11.218 NFS 238 V4 Call ACCESS =
FH: 0xeabd4697, [Check: RD LU MD XT DL]
> 492 162.001218772 172.17.11.218 -> 172.17.141.150 NFS 222 V4 Reply (Call =
In 491) ACCESS, [Allowed: RD LU MD XT DL]
> 493 162.040415201 172.17.141.150 -> 172.17.11.218 TCP 66 rndc > nfs [ACK]=
 Seq=3D10541 Ack=3D10125 Win=3D16605 Len=3D0 TSval=3D520332574 TSecr=3D1479=
037647
> 494 166.874398617 172.17.141.150 -> 172.17.11.218 TCP 66 [TCP Keep-Alive]=
 nlogin > nfs [ACK] Seq=3D39640 Ack=3D46777 Win=3D24576 Len=3D0 TSval=3D520=
337408 TSecr=3D1478982393
> 495 166.874438892 172.17.141.150 -> 172.17.11.218 NFS 250 V4 Call SEQUENC=
E
> 496 166.874506845 172.17.11.218 -> 172.17.141.150 TCP 66 [TCP Dup ACK 462=
#1] nfs > nlogin [ACK] Seq=3D46777 Ack=3D39641 Win=3D24559 Len=3D0 TSval=3D=
1479042521 TSecr=3D520277320
> 497 166.874720218 172.17.11.218 -> 172.17.141.150 NFS 218 V4 Reply (Call =
In 495) SEQUENCE
> 498 166.874730215 172.17.141.150 -> 172.17.11.218 TCP 66 nlogin > nfs [AC=
K] Seq=3D39825 Ack=3D46929 Win=3D24575 Len=3D0 TSval=3D520337408 TSecr=3D14=
79042521
> 499 166.874987010 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 500 166.875172744 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 499) TEST_STATEID
> 501 166.875309487 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x534735df/
> 502 166.875655661 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 501) OPEN StateID: 0xd7ae
> 503 166.875801366 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 504 166.876042044 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 503) TEST_STATEID
> 505 166.876210946 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xdabfc399/
> 506 166.876485761 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 505) OPEN StateID: 0x9578
> 507 166.876607463 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xdabfc399/
> 508 166.876820365 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 507) OPEN StateID: 0xfa83
> 509 166.876941430 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 510 166.877123487 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 509) TEST_STATEID
> 511 166.877205876 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x968ca393/
> 512 166.877464268 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 511) OPEN StateID: 0x25d5
> 513 166.877600104 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 514 166.877841822 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 513) TEST_STATEID
> 515 166.877997847 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xde4187cf/
> 516 166.878265626 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 515) OPEN StateID: 0xd5ce
> 517 166.878393548 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 518 166.878603997 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 517) TEST_STATEID
> 519 166.878692334 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x9f6703e9/
> 520 166.878920958 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 519) OPEN StateID: 0x69a1
> 521 166.878964818 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 522 166.879156141 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 521) TEST_STATEID
> 523 166.879195140 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xe5c84183/
> 524 166.879435831 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 523) OPEN StateID: 0x6069
> 525 166.879518910 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 526 166.879709592 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 525) TEST_STATEID
> 527 166.879796731 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x927973ae/
> 528 166.880024682 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 527) OPEN StateID: 0xf420
> 529 166.880070944 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x927973ae/
> 530 166.880265884 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 529) OPEN StateID: 0xec63
> 531 166.880301034 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 532 166.880511051 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 531) TEST_STATEID
> 533 166.880575938 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x05761d23/
> 534 166.880798417 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 533) OPEN StateID: 0xb199
> 535 166.880840801 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 536 166.881008021 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 535) TEST_STATEID
> 537 166.881043797 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xb6b205f7/
> 538 166.881270127 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 537) OPEN StateID: 0x49df
> 539 166.881304710 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xb6b205f7/
> 540 166.881498628 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 539) OPEN StateID: 0xf0d5
> 541 166.881545126 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 542 166.881732646 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 541) TEST_STATEID
> 543 166.881775578 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x0183cd1e/
> 544 166.881978864 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 543) OPEN StateID: 0x546d
> 545 166.882021595 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 546 166.882209030 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 545) TEST_STATEID
> 547 166.882252306 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x673ef4c3/
> 548 166.882484514 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 547) OPEN StateID: 0xa46d
> 549 166.882523043 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x673ef4c3/
> 550 166.882710061 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 549) OPEN StateID: 0xaa9a
> 551 166.882750420 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 552 166.882933338 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 551) TEST_STATEID
> 553 166.882961488 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x3699764a/
> 554 166.883192776 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 553) OPEN StateID: 0x3c37
> 555 166.883223581 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 556 166.883407176 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 555) TEST_STATEID
> 557 166.883468198 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x94fd1187/
> 558 166.883679012 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 557) OPEN StateID: 0xbedf
> 559 166.883719911 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 560 166.883910224 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 559) TEST_STATEID
> 561 166.883937791 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xcd96c73b/
> 562 166.884165115 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 561) OPEN StateID: 0xbf6c
> 563 166.884194351 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 564 166.884378426 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 563) TEST_STATEID
> 565 166.884433848 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xd24bb22d/
> 566 166.884661584 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 565) OPEN StateID: 0xaaf5
> 567 166.884719445 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 568 166.884904098 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 567) TEST_STATEID
> 569 166.884952255 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x5e594598/
> 570 166.885154240 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 569) OPEN StateID: 0x11cb
> 571 166.885206342 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 572 166.885389478 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 571) TEST_STATEID
> 573 166.885454506 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xa4fd80c1/
> 574 166.885686638 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 573) OPEN StateID: 0x9363
> 575 166.885745762 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 576 166.885933232 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 575) TEST_STATEID
> 577 166.885980692 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x80e4743a/
> 578 166.886212637 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 577) OPEN StateID: 0x63af
> 579 166.886272585 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 580 166.886457823 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 579) TEST_STATEID
> 581 166.886514332 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xb3e2d284/
> 582 166.886742488 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 581) OPEN StateID: 0x52d9
> 583 166.886803826 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 584 166.886989516 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 583) TEST_STATEID
> 585 166.887100351 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x95137efa/
> 586 166.887304377 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 585) OPEN StateID: 0xb26e
> 587 166.887395696 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 588 166.887587544 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 587) TEST_STATEID
> 589 166.887703373 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x1d70394e/
> 590 166.887919160 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 589) OPEN StateID: 0x753c
> 591 166.887999278 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 592 166.888190709 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 591) TEST_STATEID
> 593 166.888298867 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x680da7ff/
> 594 166.888530666 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 593) OPEN StateID: 0x097c
> 595 166.888605330 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 596 166.888795331 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 595) TEST_STATEID
> 597 166.888902566 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x0a52a987/
> 598 166.889113308 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 597) OPEN StateID: 0x7781
> 599 166.889162100 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 600 166.889353078 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 599) TEST_STATEID
> 601 166.889461157 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x56462642/
> 602 166.889699242 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 601) OPEN StateID: 0xb209
> 603 166.889772552 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 604 166.889963172 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 603) TEST_STATEID
> 605 166.890070241 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x850c0567/
> 606 166.890272350 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 605) OPEN StateID: 0x8134
> 607 166.890335412 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 608 166.890542793 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 607) TEST_STATEID
> 609 166.890650208 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x31aa2390/
> 610 166.890886053 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 609) OPEN StateID: 0x1f30
> 611 166.890959992 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 612 166.891158969 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 611) TEST_STATEID
> 613 166.891264349 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x2ae7f451/
> 614 166.891516937 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 613) OPEN StateID: 0x3fce
> 615 166.891591778 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 616 166.891788024 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 615) TEST_STATEID
> 617 166.891902329 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xa5cb13d3/
> 618 166.892117369 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 617) OPEN StateID: 0x03d6
> 619 166.892175933 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 620 166.892398086 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 619) TEST_STATEID
> 621 166.892447518 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x3f5cfcdb/
> 622 166.892671544 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 621) OPEN StateID: 0x8bff
> 623 166.892716533 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 624 166.892901971 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 623) TEST_STATEID
> 625 166.892940753 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x40b4d194/
> 626 166.893167930 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 625) OPEN StateID: 0xe3e8
> 627 166.893215973 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 628 166.893398652 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 627) TEST_STATEID
> 629 166.893445197 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x4643d6fc/
> 630 166.893682547 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 629) OPEN StateID: 0xe194
> 631 166.893731829 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 632 166.893915920 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 631) TEST_STATEID
> 633 166.893960986 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xd246cbd3/
> 634 166.894191435 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 633) OPEN StateID: 0x22f5
> 635 166.894240889 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 636 166.894425035 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 635) TEST_STATEID
> 637 166.894470784 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xde40a6e1/
> 638 166.894695618 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 637) OPEN StateID: 0x9ce2
> 639 166.894744788 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 640 166.894929372 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 639) TEST_STATEID
> 641 166.894967975 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x0f26a4dc/
> 642 166.895197152 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 641) OPEN StateID: 0x879c
> 643 166.895245038 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 644 166.895429467 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 643) TEST_STATEID
> 645 166.895471234 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x82162062/
> 646 166.895694775 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 645) OPEN StateID: 0xab68
> 647 166.895744208 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 648 166.895929221 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 647) TEST_STATEID
> 649 166.895973162 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0xb8b3b57f/
> 650 166.896197535 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 649) OPEN StateID: 0xfb0b
> 651 166.896245960 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 652 166.896430271 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 651) TEST_STATEID
> 653 166.896475752 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x2e6c2b31/
> 654 166.896705501 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 653) OPEN StateID: 0x8e00
> 655 166.896754419 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 656 166.896939911 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 655) TEST_STATEID
> 657 166.896983440 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x547cf5ea/
> 658 166.897209526 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 657) OPEN StateID: 0x0532
> 659 166.897258079 172.17.141.150 -> 172.17.11.218 NFS 274 V4 Call TEST_ST=
ATEID
> 660 166.897443527 172.17.11.218 -> 172.17.141.150 NFS 234 V4 Reply (Call =
In 659) TEST_STATEID
> 661 166.897484081 172.17.141.150 -> 172.17.11.218 NFS 334 V4 Call OPEN DH=
: 0x33c176ce/
> 662 166.897693578 172.17.11.218 -> 172.17.141.150 NFS 454 V4 Reply (Call =
In 661) OPEN StateID: 0x3648
> 663 166.937386876 172.17.141.150 -> 172.17.11.218 TCP 66 nlogin > nfs [AC=
K] Seq=3D59461 Ack=3D70165 Win=3D24576 Len=3D0 TSval=3D520337471 TSecr=3D14=
79042544
> ^C663 packets captured
> [hedrick@camaro ~]$=20
>=20
> Here=E2=80=99s the corresponding section of /var/log/messages
>=20
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: nfs4_reclaim_open_state: =
1 callbacks suppressed
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
> Apr 13 15:36:05 camaro.lcsr.rutgers.edu kernel: NFS: nfs4_reclaim_open_st=
ate: Lock reclaim failed!
>=20
>=20
>=20
>=20
>> On Apr 13, 2021, at 1:24 PM, Chuck Lever III <chuck.lever@oracle.com> wr=
ote:
>>=20
>>=20
>>=20
>>> On Apr 13, 2021, at 12:23 PM, Benjamin Coddington <bcodding@redhat.com>=
 wrote:
>>>=20
>>> (resending this as it bounced off the list - I accidentally embedded HT=
ML)
>>>=20
>>> Yes, if you're pretty sure your hostnames are all different, the client=
_ids
>>> should be different.  For v4.0 you can turn on debugging (rpcdebug -m n=
fs -s
>>> proc) and see the client_id in the kernel log in lines that look like: =
"NFS
>>> call setclientid auth=3D%s, '%s'\n", which will happen at mount time, b=
ut it
>>> doesn't look like we have any debugging for v4.1 and v4.2 for EXCHANGE_=
ID.
>>>=20
>>> You can extract it via the crash utility, or via systemtap, or by doing=
 a
>>> wire capture, but nothing that's easily translated to running across a =
large
>>> number of machines.  There's probably other ways, perhaps we should tac=
k
>>> that string into the tracepoints for exchange_id and setclientid.
>>>=20
>>> If you're interested in troubleshooting, wire capture's usually the mos=
t
>>> informative.  If the lockup events all happen at the same time, there
>>> might be some network event that is triggering the issue.
>>>=20
>>> You should expect NFSv4.1 to be rock-solid.  Its rare we have reports
>>> that it isn't, and I'd love to know why you're having these problems.
>>=20
>> I echo that: NFSv4.1 protocol and implementation are mature, so if
>> there are operational problems, it should be root-caused.
>>=20
>> NFSv4.1 uses a uniform client ID. That should be the "good" one,
>> not the NFSv4.0 one that has a non-zero probability of collision.
>>=20
>> Charles, please let us know if there are particular workloads that
>> trigger the lock reclaim failure. A narrow reproducer would help
>> get to the root issue quickly.
>>=20
>>=20
>>> Ben
>>>=20
>>> On 13 Apr 2021, at 11:38, hedrick@rutgers.edu wrote:
>>>=20
>>>> The server is ubuntu 20, with a ZFS file system.
>>>>=20
>>>> I don=E2=80=99t set the unique ID. Documentation claims that it is set=
 from the hostname. They will surely be unique, or the whole world would bl=
ow up. How can I check the actual unique ID being used? The kernel reports =
a blank one, but I think that just means to use the hostname. We could obvi=
ously set a unique one if that would be useful.
>>>>=20
>>>>> On Apr 13, 2021, at 11:35 AM, Benjamin Coddington <bcodding@redhat.co=
m> wrote:
>>>>>=20
>>>>> It would be interesting to know why your clients are failing to recla=
im their locks.  Something is misconfigured.  What server are you using, an=
d is there anything fancy on the server-side (like HA)?  Is it possible tha=
t you have clients with the same nfs4_unique_id?
>>>>>=20
>>>>> Ben
>>>>>=20
>>>>> On 13 Apr 2021, at 11:17, hedrick@rutgers.edu wrote:
>>>>>=20
>>>>>> many, though not all, of the problems are =E2=80=9Clock reclaim fail=
ed=E2=80=9D.
>>>>>>=20
>>>>>>> On Apr 13, 2021, at 10:52 AM, Patrick Goetz <pgoetz@math.utexas.edu=
> wrote:
>>>>>>>=20
>>>>>>> I use NFS 4.2 with Ubuntu 18/20 workstations and Ubuntu 18/20 serve=
rs and haven't had any problems.
>>>>>>>=20
>>>>>>> Check your configuration files; the last time I experienced somethi=
ng like this it's because I inadvertently used the same fsid on two differe=
nt exports. Also recommend exporting top level directories only.  Bind moun=
t everything you want to export into /srv/nfs and only export those directo=
ries. According to Bruce F. this doesn't buy you any security (I still don'=
t understand why), but it makes for a cleaner system configuration.
>>>>>>>=20
>>>>>>> On 4/13/21 9:33 AM, hedrick@rutgers.edu wrote:
>>>>>>>> I am in charge of a large computer science dept computing infrastr=
ucture. We have a variety of student and develo9pment users. If there are p=
roblems we=E2=80=99ll see them.
>>>>>>>> We use an Ubuntu 20 server, with NVMe storage.
>>>>>>>> I=E2=80=99ve just had to move Centos 7 and Ubuntu 18 to use NFS 4.=
0. We had hangs with NFS 4.1 and 4.2. Files would appear to be locked, alth=
ough eventually the lock would time out. It=E2=80=99s too soon to be sure t=
hat moving back to NFS 4.0 will fix it. Next is either NFS 3 or disabling d=
elegations on the server.
>>>>>>>> Are there known versions of NFS that are safe to use in production=
 for various kernel versions? The one we=E2=80=99re most interested in is U=
buntu 20, which can be anything from 5.4 to 5.8.
>>>>>=20
>>>=20
>>>=20
>>>=20
>>=20
>> --
>> Chuck Lever
>>=20
>>=20
>>=20
>=20