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Additionally, change TestQueryFields.testSomeFields() to handle lists of
fields shorter than 20 elements.
Signed-off-by: Adeodato Simo <dato@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Locks can now be queried using “Query(what="lock", …)” over LUXI.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This allows “gnt-node list” to show the difference between modes marked
offline and nodes with e.g. RPC errors (“(nodata)”). node1 is the
master, node2's node daemon crashed and node3 is marked offline:

$ gnt-node list -o name,offline,dtotal,dfree
Node              Offline    DTotal     DFree
node1.example.com N            1.3T      1.3T
node2.example.com N        (nodata)  (nodata)
node3.example.com Y       (offline) (offline)
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

It'll be used for querying locks.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Also replace “sorted” with “utils.NiceSort” now that it supports a key
function.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

In upgraded configurations, some items might miss the “ctime” and/or
“mtime” values and need to be handled specially.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

- Show only field definition, not callback when a result row is
  inconsistent
- Show list of duplicate titles if there are any (module load time)
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Adeodato Simo <dato@google.com>

This includes a bunch of helper functions which can be helpful for other
queries, too. Unittests are included.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

While not immediately visible, using definition-based queries will allow
for a number of optimizations and simplifications. This patch just
contains the utility class used for executing queries.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>