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Handle mismatch of reported 'dm raid' status, where the active
raid LV can be actually showing higher numebr of raid leg devices,
that the number of shown status characters.
This can happen if the raid leg is dropped during initial
resynchronization.
We already create /dev/disk/by-uuid symlinks for DM devices which
contain crypto-type as next layer (as identified by blkid).
Also create /dev/disk/by-label symlinks as the labels can be
defined for crypto-type devices too.
Reported and fix suggested by: Patrick Plenefisch <simonpatp@gmail.com>
See also:
https://lore.kernel.org/lvm-devel/CAOCpoWfYjOVNJNt+cnOVXDHiDq2wRogTqBijcUoa7chqOLRa5Q@mail.gmail.com/
When reporting in JSON format, we need to be able to find the 'last
displayed row', not just 'last row' as we did before. This is used
to decide whether to put the JSON_SEPARATOR (the ',' character)
between the lines when reporting in JSON format.
This is mainly important in case we use a combination of JSON format
and a report marked with DM_REPORT_OUTPUT_MULTIPLE_TIMES flag.
Such report may be reused several times with different selection
criteria each time. In that case, the report always contains all lines
in memory, even though some of them do not need to pass the selection
criteria that are currently used.
Without DM_REPORT_OUTPUT_MULTIPLE_TIMES flag, the report only contains
the lines that have passed the selection criteria, so the this wasn't
an issue in this case.
Fix suggested by Lars Ellenberg and reported here: https://github.com/lvmteam/lvm2/issues/130
Add '--headings none|abbrev|full|0|1|2' command line option to select
the heading type.
none|0 - no headings
abbrev|1 - column name abbreviations
full|2 - full column names (column names are equal to exact names
that -o|--options also accepts to set report output)
Add new DM_REPORT_OUTPUT_FIELD_IDS_IN_HEADINGS report output flag.
If enabled, column IDs are reported instead of column names in report
headings.
The 'column IDs' are IDs as found in 'const struct dm_report_field_type *fields'
array that is passed during report initialization (that is, a call to
dm_report_init/dm_report_init_with_selection). In this case, the 'id'
dm_report_field_type member is used instead of the 'heading' member.
Follow-up for e10f67e917.
The commit e10f67e917 tries to keep device
node symlinks even if the device is in the suspended state. However,
necessary properties that may previously obtained by the blkid command
were not imported at least in the .rules file. So, unless ID_FS_xyz
properties are imported by another earlier .rules file, the device node
symlinks are still lost when event is processed in the suspended state.
Let's explicitly import the necessary properties.
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=2158628
GHPR: https://github.com/lvmteam/lvm2/pull/105
We used KERNEL=="device-mapper", NAME="/dev/mapper/control" udev rule to
create the /dev/mapper/control file. The "NAME" rule should be only used
to rename network devices, otherwise udev issues a warning message. The
device-mapper driver has proper DEVNAME=/dev/mapper/control propagated
in the uevent environment when it is loaded so we don't need further
instruction on where to create the node - udev knows already.
Also, these days, it is created directly by kernel inside devtmpfs.
This makes the NAME="/dev/mapper/control" rule completely obsolete.
With newer kernels (>5.13) DM_CREATE no longer generates
uevent for DM devices without table.
There are even no sysfs block device entries in such case,
although device has asigned major:minor and it is being listed
by 'dmsetup info'.
So this patch calculates amount of 'table' lines and in case
no table line comes from cmdline or stdin - waiting on cookie
is avoided generically instead of disabling just case with
option --notable - which then also skipped handling of an
option --addnodeoncreate (which is however historical and
should be avoided)
As a result there should be no leaking udev cookies and endlessly
waiting commands like this:
dmsetup create mytestdev </dev/null
Kernel patch 8b638081bd4520f63db1defc660666ec5f65bc15
introduced support to return UUID in DM_LIST_DEVICES_CMD.
Useful when asking for UUID of each device where the list
could be now returned directly with NAME && UUID for each device.
Returning UUID is done in backward-compatible way. There's one unused
32-bit word value after the event number. This patch sets the bit
DM_NAME_LIST_FLAG_HAS_UUID if UUID is present and
DM_NAME_LIST_FLAG_DOESNT_HAVE_UUID if it isn't (if none of these bits is
set, then we have an old kernel that doesn't support returning UUIDs). The
UUID is stored after this word. The 'next' value is updated to point after
the UUID, so that old version of libdevmapper will skip the UUID without
attempting to interpret it.
Existing mechanism was not able to trace root volume issue.
Simplify the functionality by using simply using activated flag
and trace the dtree in reverse order.
When generating table line for cache target line,
the estimation of added arguments was incorrectly
calculated as the evaluation order of "?" is
made after "+".
However the result was 'masked' by the
Reported-by: Jian Cai jcai19
