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Commit Graph

15240 Commits

Author SHA1 Message Date
Zdenek Kabelac
66f4f8c27f lvconvert: preserve regionsize from existing mirror
When adding leg to existing mirror - preserve its regionsize.
2018-04-23 22:42:18 +02:00
Zdenek Kabelac
ae27461777 lvchange: update mirror table when changing monitoring
Since for non-monitored mirrors we let mirror running without
error handling - when monitoring changes for mirror, updated
table (refresh) is needed.
2018-04-23 22:42:18 +02:00
Zdenek Kabelac
fcdac700f9 gcc: remove duplicate typedef 2018-04-23 22:42:18 +02:00
David Teigland
1409c4a1c2 clvm: rescan when VG or PV not found
Rescan devices to update lvmcache content when
clvmd vg_read doesn't find a VG or PV.
2018-04-20 16:09:49 -05:00
David Teigland
c42a18d372 liblvm2app: missed the addition of lvmcache_label_scan 2018-04-20 12:00:49 -05:00
David Teigland
aee27dc7ba scan: skip device rescan in vg_read
For reporting commands (pvs,vgs,lvs,pvdisplay,vgdisplay,lvdisplay)
we do not need to repeat the label scan of devices in vg_read if
they all had matching metadata in the initial label scan.  The
data read by label scan can just be reused for the vg_read.
This cuts the amount of device i/o in half, from two reads of
each device to one.  We have to be careful to avoid repairing
the VG if we've skipped rescanning.  (The VG repair code is very
poor, and will be redone soon.)
2018-04-20 11:23:14 -05:00
David Teigland
7b0a8f47be lvmpolld: update to use new scanning correctly 2018-04-20 11:22:48 -05:00
David Teigland
aa833bdd8a bcache: intercept test mode before write
Don't allow writes in test mode.  test mode should be
more sophisticated than just faking writes, and this
should be a last defense for cases where test mode is
not being checked correctly.
2018-04-20 11:22:48 -05:00
David Teigland
9b6a62f944 lvmcache: simplify
Recent changes allow some major simplification of the way
lvmcache works and is used.  lvmcache_label_scan is now
called in a controlled fashion at the start of commands,
and not via various unpredictable side effects.  Remove
various calls to it from other places.  lvmcache_label_scan
should not be called from anywhere during a command, because
it produces an incorrect representation of PVs with no MDAs,
and misclassifies them as orphans.  This has been a long
standing problem.  The invalid flag and rescanning based on
that is no longer used and removed.  The 'force' variation is
no longer needed and removed.
2018-04-20 11:22:48 -05:00
David Teigland
c0973e70a5 dev_cache: clean up scan
Pull out all of the twisted logic and simply call dev_cache_scan
at the start of the command prior to label scan.
2018-04-20 11:22:48 -05:00
David Teigland
89c65d4f71 remove unnecessary REQUIRES_FULL_LABEL_SCAN
we always scan all devices
2018-04-20 11:22:48 -05:00
David Teigland
45e5e702c1 scan: improve io error checking and reporting 2018-04-20 11:22:48 -05:00
David Teigland
6d05859862 bcache: let caller see an error 2018-04-20 11:22:48 -05:00
David Teigland
ae21305ee7 scan: drop bcache between lvm shell commands
A running lvm shell keeps all lvm devices open
unless the bcache is dropped.
2018-04-20 11:22:48 -05:00
David Teigland
a01a8d7172 tests: vgck now exits with error for bad vg 2018-04-20 11:22:48 -05:00
David Teigland
a9b0aa5c17 lvmetad: more fixes related to bcache
Need to open devs prior to bcache io.
2018-04-20 11:22:48 -05:00
David Teigland
e351f8bc66 lvmetad: need to set up bcache in another place
We need to find one common place to set up bcache
for the lvmetad case, instead of adding calls in
various places.
2018-04-20 11:22:48 -05:00
David Teigland
7e33bd1335 lvmetad: fix process_each_label
Was missing the call to populate lvmcache info from lvmetad
at the start of process_each_label.
2018-04-20 11:22:48 -05:00
David Teigland
ddb5de7a98 clvm: fix bcache scan handling
We can't let clvmd keep all scanned devs open,
which prevents them from being removed.  So
drop the bcache data (and close fds) affter
doing a label scan.

Also set up bcache before the clvm-specific
vg_read (which needs to rescan the vg's devs
using bcache) and destroy the bcache after.
2018-04-20 11:22:48 -05:00
David Teigland
196579af1f scan: check for errors in text layer
The scanning code in the format_text layer
has previously ignored errors.  Start checking
for and returning them.
2018-04-20 11:22:47 -05:00
David Teigland
44726ed9cb scan: remove lvmcache info for failed devs
When scanning a device fails, drop an lvmcache
info struct for it.
2018-04-20 11:22:47 -05:00
David Teigland
1717d4cb17 lvmcache: add shorter way to delete dev info
Don't make the caller look up the info first.
2018-04-20 11:22:47 -05:00
David Teigland
570c6239ee bcache: fix error handling
The error handling code wasn't working, but it
appears that just removing it is what we need.
The doesn't really need any different behavior
related to bcache blocks on an io error, it just
wants to know if there was an error.
2018-04-20 11:22:47 -05:00
David Teigland
217f3f8741 scan: add function to drop bcache blocks
which can be a little more efficient that destroy.
2018-04-20 11:22:47 -05:00
David Teigland
da2b155a9d scan: invalidate bcache for dev after errors
If there are errors reading or writing dev,
invalidate bcache for it.
2018-04-20 11:22:47 -05:00
David Teigland
4331182964 bcache: add some error messages for debugging 2018-04-20 11:22:47 -05:00
David Teigland
21057676a1 scan: create bcache with minimum number of blocks
In some odd cases (e.g. tests) there are very few devices
which results in creating too few blocks in bcache, so
create bcache with a minimum number of blocks.
2018-04-20 11:22:47 -05:00
David Teigland
e49b114f7e bcache: use wrappers for bcache read write in lvm
Using a wrapper makes it easier to disable bcache if needed.
2018-04-20 11:22:47 -05:00
David Teigland
8065492046 bcache: do all writes through bcache 2018-04-20 11:22:47 -05:00
David Teigland
8b26a007b1 misc bcache fixes from ejt 2018-04-20 11:22:47 -05:00
David Teigland
0da296003d vgchange: invalidate bcache for stacked LVs when deactivating
An LV with a stacked PV will be open in bcache and needs to be
invalidated to close the fd before attempting to deactivate.
2018-04-20 11:22:47 -05:00
David Teigland
34fd818caf scan: drop bcache and close fd for LV with stacked PV
When a PV is stacked on an LV, the LV will be kept in
bcache, and the open fd on the LV may interfere with
processing the LV.  So, drop/close a bcache fd for
an LV before processing the LV.
2018-04-20 11:22:47 -05:00
David Teigland
c2b10daf69 scan: put dev back on caller's list
Commit 6e442875613915e506440e59a290b56756df2521 missed
adding devs back to caller's list.
2018-04-20 11:22:47 -05:00
David Teigland
e7670d3338 pvck: use bcache 2018-04-20 11:22:47 -05:00
David Teigland
b504bb809e scan: use 128K bcache block size 2018-04-20 11:22:46 -05:00
David Teigland
ae093df3f1 test: vgsplit-usage if LVM1 tests 2018-04-20 11:22:46 -05:00
David Teigland
d75aa55784 disable LVM1 tests 2018-04-20 11:22:46 -05:00
David Teigland
96a61337b0 lvmdiskscan: use the new label_scan
instead of doing it's own.
2018-04-20 11:22:46 -05:00
David Teigland
28255e3eee scan: always setup bcache for commands using lvmetad
Do this at the start of the command so that it doesn't
need to be checked and set up in every function that
could need it.
2018-04-20 11:22:46 -05:00
David Teigland
f328532f05 scan: leave the caller's dev list unchanged
When scanning the list of devs from the caller
they are moved to another temporary list, but
were never returned to the original list.
2018-04-20 11:22:46 -05:00
David Teigland
7bce66c5e8 scan: setup bcache for commands using lvmetad
Commands using lvmetad will not begin with a proper
label_scan which initializes bcache, but may later
decide they need to scan a set of devs, in which case
they'll need bcache set up at that point.
2018-04-20 11:22:46 -05:00
David Teigland
6e580465b5 vgremove: fix force remove on devs with damaged metadata
The improved detection of bad metadata when scanning
(where errors were ignored before) means we now have to
override some errors when forcibly erasing damaged metadata.
2018-04-20 11:22:46 -05:00
David Teigland
37471bb477 scan: skip extra scan in vg_read
Drop an extra label scan in the recovery part
of vg_read.  This is a temporary improvement
until the pending replacement for the broken
recovery code burried in vg_read.
2018-04-20 11:22:46 -05:00
David Teigland
e4f478d86d scan: handle request to scan missing dev 2018-04-20 11:22:46 -05:00
David Teigland
89f54a5094 remove debugging print 2018-04-20 11:22:46 -05:00
David Teigland
c29899b910 remove unused variable in _pvremove_check_single 2018-04-20 11:22:46 -05:00
David Teigland
a1e3398ffc scan: handle no devices
Still create bcache.
2018-04-20 11:22:46 -05:00
David Teigland
9d2add1361 scan: add a dev to bcache before each read to handle write path
This is a temporary hacky workaround to the problem of
reads going through bcache and writes not using bcache.
The write path wants to read parts of data that it is
incrementally writing to disk, but the reads (using
bcache) don't work because the writes are not in the
bcache.  For now, add a dev to bcache before each attempt
to read it in case it's being used on the write path.
2018-04-20 11:22:46 -05:00
David Teigland
6c67c7557c scan: use separate fd for bcache
Create a new dev->bcache_fd that the scanning code owns
and is in charge of opening/closing.  This prevents other
parts of lvm code (which do various open/close) from
interfering with the bcache fd.  A number of dev_open
and dev_close are removed from the reading path since
the read path now uses the bcache.

With that in place, open(O_EXCL) for pvcreate/pvremove
can then be fixed.  That wouldn't work previously because
of other open fds.
2018-04-20 11:22:46 -05:00
David Teigland
4343280ebc process_each_label: use lvmcache
In the same way as the other process_each functions.
In the common case all the info that's needed can be
used from lvmcache after a label scan.  But this means
that unchosen devs for duplicate PVs need to be handled
explicitly.
2018-04-20 11:22:46 -05:00