mirror of
https://github.com/ceph/ceph
synced 2024-12-25 04:43:17 +00:00
d72fca26ed
Since kernel 5.12, hardware read-only state and user read-only policy (BLKROGET/SET ioctls) are tracked separately in the block layer. As the purpose of our ->set_read_only() method was exactly that, it was removed. As a side effect, BLKROSET no longer returns EROFS on an attempt to make a read-only mapping read-write with "blockdev --setrw". The policy gets updated, but the device remains read-only as before because the hardware (== mapping) state is controlled by the driver. Fixes: https://tracker.ceph.com/issues/49858 Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
353 lines
9.8 KiB
Raku
353 lines
9.8 KiB
Raku
|
|
Setup
|
|
=====
|
|
|
|
$ RO_KEY=$(ceph auth get-or-create-key client.ro mon 'profile rbd' mgr 'profile rbd' osd 'profile rbd-read-only')
|
|
$ rbd create --size 10 img
|
|
$ rbd snap create --no-progress img@snap
|
|
$ rbd snap protect img@snap
|
|
$ rbd clone img@snap cloneimg
|
|
$ rbd create --size 1 imgpart
|
|
$ DEV=$(sudo rbd map imgpart)
|
|
$ cat <<EOF | sudo sfdisk $DEV >/dev/null 2>&1
|
|
> unit: sectors
|
|
> /dev/rbd0p1 : start= 512, size= 512, Id=83
|
|
> /dev/rbd0p2 : start= 1024, size= 512, Id=83
|
|
> EOF
|
|
$ sudo rbd unmap $DEV
|
|
$ rbd snap create --no-progress imgpart@snap
|
|
|
|
|
|
Image HEAD
|
|
==========
|
|
|
|
R/W, unpartitioned:
|
|
|
|
$ DEV=$(sudo rbd map img)
|
|
$ blockdev --getro $DEV
|
|
0
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard $DEV
|
|
$ blockdev --setro $DEV
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setro $DEV
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard $DEV
|
|
blkdiscard: /dev/rbd?: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ blockdev --setrw $DEV
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw $DEV
|
|
$ blockdev --getro $DEV
|
|
0
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard $DEV
|
|
$ sudo rbd unmap $DEV
|
|
|
|
R/W, partitioned:
|
|
|
|
$ DEV=$(sudo rbd map imgpart)
|
|
$ udevadm settle
|
|
$ blockdev --getro ${DEV}p1
|
|
0
|
|
$ blockdev --getro ${DEV}p2
|
|
0
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p1
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p2
|
|
$ blockdev --setro ${DEV}p1
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setro ${DEV}p1
|
|
$ blockdev --getro ${DEV}p1
|
|
1
|
|
$ blockdev --getro ${DEV}p2
|
|
0
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p1': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p1
|
|
blkdiscard: /dev/rbd?p1: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p2
|
|
$ blockdev --setrw ${DEV}p1
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw ${DEV}p1
|
|
$ blockdev --getro ${DEV}p1
|
|
0
|
|
$ blockdev --getro ${DEV}p2
|
|
0
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p1
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p2
|
|
$ sudo rbd unmap $DEV
|
|
|
|
$ DEV=$(sudo rbd map imgpart)
|
|
$ udevadm settle
|
|
$ blockdev --getro ${DEV}p1
|
|
0
|
|
$ blockdev --getro ${DEV}p2
|
|
0
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p1
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p2
|
|
$ blockdev --setro ${DEV}p2
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setro ${DEV}p2
|
|
$ blockdev --getro ${DEV}p1
|
|
0
|
|
$ blockdev --getro ${DEV}p2
|
|
1
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p1
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p2': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p2
|
|
blkdiscard: /dev/rbd?p2: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ blockdev --setrw ${DEV}p2
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw ${DEV}p2
|
|
$ blockdev --getro ${DEV}p1
|
|
0
|
|
$ blockdev --getro ${DEV}p2
|
|
0
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p1
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
$ blkdiscard ${DEV}p2
|
|
$ sudo rbd unmap $DEV
|
|
|
|
R/O, unpartitioned:
|
|
|
|
$ DEV=$(sudo rbd map --read-only img)
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard $DEV
|
|
blkdiscard: /dev/rbd?: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ blockdev --setrw $DEV
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw $DEV # succeeds but effectively ignored
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard $DEV
|
|
blkdiscard: /dev/rbd?: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ sudo rbd unmap $DEV
|
|
|
|
R/O, partitioned:
|
|
|
|
$ DEV=$(sudo rbd map --read-only imgpart)
|
|
$ udevadm settle
|
|
$ blockdev --getro ${DEV}p1
|
|
1
|
|
$ blockdev --getro ${DEV}p2
|
|
1
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p1': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p1
|
|
blkdiscard: /dev/rbd?p1: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p2': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p2
|
|
blkdiscard: /dev/rbd?p2: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ blockdev --setrw ${DEV}p1
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw ${DEV}p1 # succeeds but effectively ignored
|
|
$ blockdev --setrw ${DEV}p2
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw ${DEV}p2 # succeeds but effectively ignored
|
|
$ blockdev --getro ${DEV}p1
|
|
1
|
|
$ blockdev --getro ${DEV}p2
|
|
1
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p1': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p1
|
|
blkdiscard: /dev/rbd?p1: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p2': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p2
|
|
blkdiscard: /dev/rbd?p2: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ sudo rbd unmap $DEV
|
|
|
|
|
|
Image snapshot
|
|
==============
|
|
|
|
Unpartitioned:
|
|
|
|
$ DEV=$(sudo rbd map img@snap)
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard $DEV
|
|
blkdiscard: /dev/rbd?: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ blockdev --setrw $DEV
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw $DEV # succeeds but effectively ignored
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ dd if=/dev/urandom of=$DEV bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard $DEV
|
|
blkdiscard: /dev/rbd?: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ sudo rbd unmap $DEV
|
|
|
|
Partitioned:
|
|
|
|
$ DEV=$(sudo rbd map imgpart@snap)
|
|
$ udevadm settle
|
|
$ blockdev --getro ${DEV}p1
|
|
1
|
|
$ blockdev --getro ${DEV}p2
|
|
1
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p1': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p1
|
|
blkdiscard: /dev/rbd?p1: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p2': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p2
|
|
blkdiscard: /dev/rbd?p2: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ blockdev --setrw ${DEV}p1
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw ${DEV}p1 # succeeds but effectively ignored
|
|
$ blockdev --setrw ${DEV}p2
|
|
.*BLKROSET: Permission denied (re)
|
|
[1]
|
|
$ sudo blockdev --setrw ${DEV}p2 # succeeds but effectively ignored
|
|
$ blockdev --getro ${DEV}p1
|
|
1
|
|
$ blockdev --getro ${DEV}p2
|
|
1
|
|
$ dd if=/dev/urandom of=${DEV}p1 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p1': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p1
|
|
blkdiscard: /dev/rbd?p1: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ dd if=/dev/urandom of=${DEV}p2 bs=1k seek=1 count=1 status=none
|
|
dd: error writing '/dev/rbd?p2': Operation not permitted (glob)
|
|
[1]
|
|
$ blkdiscard ${DEV}p2
|
|
blkdiscard: /dev/rbd?p2: BLKDISCARD ioctl failed: Operation not permitted (glob)
|
|
[1]
|
|
$ sudo rbd unmap $DEV
|
|
|
|
|
|
read-only OSD caps
|
|
==================
|
|
|
|
R/W:
|
|
|
|
$ DEV=$(sudo rbd map --id ro --key $(echo $RO_KEY) img)
|
|
rbd: sysfs write failed
|
|
rbd: map failed: (1) Operation not permitted
|
|
[1]
|
|
|
|
R/O:
|
|
|
|
$ DEV=$(sudo rbd map --id ro --key $(echo $RO_KEY) --read-only img)
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ sudo rbd unmap $DEV
|
|
|
|
Snapshot:
|
|
|
|
$ DEV=$(sudo rbd map --id ro --key $(echo $RO_KEY) img@snap)
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ sudo rbd unmap $DEV
|
|
|
|
R/W, clone:
|
|
|
|
$ DEV=$(sudo rbd map --id ro --key $(echo $RO_KEY) cloneimg)
|
|
rbd: sysfs write failed
|
|
rbd: map failed: (1) Operation not permitted
|
|
[1]
|
|
|
|
R/O, clone:
|
|
|
|
$ DEV=$(sudo rbd map --id ro --key $(echo $RO_KEY) --read-only cloneimg)
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ sudo rbd unmap $DEV
|
|
|
|
|
|
rw -> ro with open_count > 0
|
|
============================
|
|
|
|
$ DEV=$(sudo rbd map img)
|
|
$ { sleep 10; sudo blockdev --setro $DEV; } &
|
|
$ dd if=/dev/urandom of=$DEV bs=1k oflag=direct status=noxfer
|
|
dd: error writing '/dev/rbd?': Operation not permitted (glob)
|
|
[1-9]\d*\+0 records in (re)
|
|
[1-9]\d*\+0 records out (re)
|
|
[1]
|
|
$ sudo rbd unmap $DEV
|
|
|
|
|
|
"-o rw --read-only" should result in read-only mapping
|
|
======================================================
|
|
|
|
$ DEV=$(sudo rbd map -o rw --read-only img)
|
|
$ blockdev --getro $DEV
|
|
1
|
|
$ sudo rbd unmap $DEV
|
|
|
|
|
|
Teardown
|
|
========
|
|
|
|
$ rbd snap purge imgpart >/dev/null 2>&1
|
|
$ rbd rm imgpart >/dev/null 2>&1
|
|
$ rbd rm cloneimg >/dev/null 2>&1
|
|
$ rbd snap unprotect img@snap
|
|
$ rbd snap purge img >/dev/null 2>&1
|
|
$ rbd rm img >/dev/null 2>&1
|
|
|