linux.git/Documentation/admin-guide/device-mapper, branch v6.6.131 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Documentation: dm-integrity: Document an example of how the tunables relate. 2023-06-22T22:39:51+00:00 Russell Harmon eatnumber1@gmail.com 2023-06-05T05:08:53+00:00 2971c058746319e9853919553259cef7fe280c94 Signed-off-by: Russell Harmon <eatnumber1@gmail.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
Signed-off-by: Russell Harmon <eatnumber1@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Documentation: dm-integrity: Document default values. 2023-06-22T22:39:50+00:00 Russell Harmon eatnumber1@gmail.com 2023-06-05T05:08:52+00:00 52145f284c66b9de5be7b054444dd0da066079d6 Signed-off-by: Russell Harmon <eatnumber1@gmail.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
Signed-off-by: Russell Harmon <eatnumber1@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Documentation: dm-integrity: Document the meaning of "buffer". 2023-06-22T22:39:50+00:00 Russell Harmon eatnumber1@gmail.com 2023-06-05T05:08:51+00:00 3b671459e687e6b7d3f87d39a0b242bbebf871be "Buffers" are buffers of the metadata/checksum area of dm-integrity. They are always at most as large as a single metadata area on-disk, but may be smaller. Signed-off-by: Russell Harmon <eatnumber1@gmail.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
"Buffers" are buffers of the metadata/checksum area of dm-integrity.
They are always at most as large as a single metadata area on-disk, but
may be smaller.

Signed-off-by: Russell Harmon <eatnumber1@gmail.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Documentation: dm-integrity: Fix minor grammatical error. 2023-06-22T22:39:50+00:00 Russell Harmon eatnumber1@gmail.com 2023-06-05T05:08:50+00:00 c3ba5aa6f789097364398ad38fe541841bade17d "where dm-integrity uses bitmap" becomes "where dm-integrity uses a bitmap" Signed-off-by: Russell Harmon <eatnumber1@gmail.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
"where dm-integrity uses bitmap" becomes "where dm-integrity uses a
bitmap"

Signed-off-by: Russell Harmon <eatnumber1@gmail.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
dm flakey: introduce random_read_corrupt and random_write_corrupt options 2023-06-16T22:24:13+00:00 Mikulas Patocka mpatocka@redhat.com 2023-05-01T13:20:08+00:00 4c2c845bdc9a3443ce805460a75242923b0c5ab5 The random_read_corrupt and random_write_corrupt options corrupt a random byte in a bio with the provided probability. The corruption only happens in the "down" interval. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
The random_read_corrupt and random_write_corrupt options corrupt a
random byte in a bio with the provided probability. The corruption
only happens in the "down" interval.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
dm flakey: add an "error_reads" option 2023-04-19T15:13:43+00:00 Mikulas Patocka mpatocka@redhat.com 2023-04-18T19:56:41+00:00 aa7d7bc99fed71664e9a241b32294ee15a88d938 dm-flakey returns error on reads if no other argument is specified. This commit simplifies associated logic while formalizing an "error_reads" argument and an ERROR_READS flag. If no argument is specified, set ERROR_READS flag so that it behaves just like before this commit. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
dm-flakey returns error on reads if no other argument is specified.
This commit simplifies associated logic while formalizing an
"error_reads" argument and an ERROR_READS flag.

If no argument is specified, set ERROR_READS flag so that it behaves
just like before this commit.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Documentation: admin-guide: correct spelling 2023-02-02T18:04:42+00:00 Randy Dunlap rdunlap@infradead.org 2023-01-29T23:10:45+00:00 dbeb56fe80e5574388ed9767788e8eb493589443 Correct spelling problems for Documentation/admin-guide/ as reported by codespell. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com> Cc: Tejun Heo <tj@kernel.org> Cc: Zefan Li <lizefan.x@bytedance.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: cgroups@vger.kernel.org Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@kernel.org> Cc: dm-devel@redhat.com Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-media@vger.kernel.org Cc: linux-mm@kvack.org Link: https://lore.kernel.org/r/20230129231053.20863-2-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> 
Correct spelling problems for Documentation/admin-guide/ as reported
by codespell.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan.x@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: cgroups@vger.kernel.org
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: dm-devel@redhat.com
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org
Cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20230129231053.20863-2-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
dm init: add dm-mod.waitfor to wait for asynchronously probed block devices 2022-12-02T22:37:45+00:00 Peter Korsgaard peter@korsgaard.com 2022-11-16T06:16:56+00:00 035641b01e72af4f6c6cf22a4bdb5d7dfc4e8e8e Just calling wait_for_device_probe() is not enough to ensure that asynchronously probed block devices are available (E.G. mmc, usb), so add a "dm-mod.waitfor=<device1>[,..,<deviceN>]" parameter to get dm-init to explicitly wait for specific block devices before initializing the tables with logic similar to the rootwait logic that was introduced with commit cc1ed7542c8c ("init: wait for asynchronously scanned block devices"). E.G. with dm-verity on mmc using: dm-mod.waitfor="PARTLABEL=hash-a,PARTLABEL=root-a" [ 0.671671] device-mapper: init: waiting for all devices to be available before creating mapped devices [ 0.671679] device-mapper: init: waiting for device PARTLABEL=hash-a ... [ 0.710695] mmc0: new HS200 MMC card at address 0001 [ 0.711158] mmcblk0: mmc0:0001 004GA0 3.69 GiB [ 0.715954] mmcblk0boot0: mmc0:0001 004GA0 partition 1 2.00 MiB [ 0.722085] mmcblk0boot1: mmc0:0001 004GA0 partition 2 2.00 MiB [ 0.728093] mmcblk0rpmb: mmc0:0001 004GA0 partition 3 512 KiB, chardev (249:0) [ 0.738274] mmcblk0: p1 p2 p3 p4 p5 p6 p7 [ 0.751282] device-mapper: init: waiting for device PARTLABEL=root-a ... [ 0.751306] device-mapper: init: all devices available [ 0.751683] device-mapper: verity: sha256 using implementation "sha256-generic" [ 0.759344] device-mapper: ioctl: dm-0 (vroot) is ready [ 0.766540] VFS: Mounted root (squashfs filesystem) readonly on device 254:0. Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
Just calling wait_for_device_probe() is not enough to ensure that
asynchronously probed block devices are available (E.G. mmc, usb), so
add a "dm-mod.waitfor=<device1>[,..,<deviceN>]" parameter to get
dm-init to explicitly wait for specific block devices before
initializing the tables with logic similar to the rootwait logic that
was introduced with commit  cc1ed7542c8c ("init: wait for
asynchronously scanned block devices").

E.G. with dm-verity on mmc using:
dm-mod.waitfor="PARTLABEL=hash-a,PARTLABEL=root-a"

[    0.671671] device-mapper: init: waiting for all devices to be available before creating mapped devices
[    0.671679] device-mapper: init: waiting for device PARTLABEL=hash-a ...
[    0.710695] mmc0: new HS200 MMC card at address 0001
[    0.711158] mmcblk0: mmc0:0001 004GA0 3.69 GiB
[    0.715954] mmcblk0boot0: mmc0:0001 004GA0 partition 1 2.00 MiB
[    0.722085] mmcblk0boot1: mmc0:0001 004GA0 partition 2 2.00 MiB
[    0.728093] mmcblk0rpmb: mmc0:0001 004GA0 partition 3 512 KiB, chardev (249:0)
[    0.738274]  mmcblk0: p1 p2 p3 p4 p5 p6 p7
[    0.751282] device-mapper: init: waiting for device PARTLABEL=root-a ...
[    0.751306] device-mapper: init: all devices available
[    0.751683] device-mapper: verity: sha256 using implementation "sha256-generic"
[    0.759344] device-mapper: ioctl: dm-0 (vroot) is ready
[    0.766540] VFS: Mounted root (squashfs filesystem) readonly on device 254:0.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
dm verity: Add documentation for try_verify_in_tasklet option 2022-10-18T21:17:48+00:00 Milan Broz gmazyland@gmail.com 2022-09-27T18:42:26+00:00 dc3efedf9f7b802d0817183020ed01cb0c120fe8 Add documentation that was missing from commit 5721d4e5a9cd ("dm verity: Add optional "try_verify_in_tasklet" feature"). Signed-off-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
Add documentation that was missing from commit 5721d4e5a9cd ("dm
verity: Add optional "try_verify_in_tasklet" feature").

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
dm writecache: count number of blocks discarded, not number of discard bios 2022-07-14T19:54:46+00:00 Mikulas Patocka mpatocka@redhat.com 2022-07-11T20:31:52+00:00 2ee73ef60db4d79b9f9b8cd501e8188b5179449f Change dm-writecache, so that it counts the number of blocks discarded instead of the number of discard bios. Make it consistent with the read and write statistics counters that were changed to count the number of blocks instead of bios. Fixes: e3a35d03407c ("dm writecache: add event counters") Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> 
Change dm-writecache, so that it counts the number of blocks discarded
instead of the number of discard bios. Make it consistent with the
read and write statistics counters that were changed to count the
number of blocks instead of bios.

Fixes: e3a35d03407c ("dm writecache: add event counters")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>