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Commit Graph

69 Commits

Author SHA1 Message Date
David Teigland
664fa6d1be lvmlockd: use new sanlock flag to avoid blocking
This flag allows sanlock requests to avoid all blocking.
2016-02-24 10:10:59 -06:00
Zdenek Kabelac
dbc71dc05e gcc: cleanup some sign warnings
When comparing unsigned with int, the comparision is made
as 'unsigned' type, so make it rather explicit which type
is being compared.
2016-02-23 12:25:25 +01:00
David Teigland
c716813651 lvmlockd: invalidate name in lockspace struct after remove
After the lockspace has been successfully removed,
invalidate the name field in the lockspace struct.
The struct remains on the list of lockspaces until
the struct can be freed later.  Until the struct is
freed, its name will prevent another new lockspace
from being created with the same name.
2016-02-22 09:36:35 -06:00
David Teigland
161ae36363 test: add make check_lvmlockd_test
Which runs lvmlockd in --test mode, without
any lock manager.

Also make some adjustments to the check_lvmlockd
variations using the lock managds.
2016-02-22 09:36:35 -06:00
David Teigland
762b0d697f lvmlockd: don't adopt locks from unused lm
When built without dlm or sanlock support, don't
attempt to adopt locks from that lm.
2016-01-28 09:42:45 -06:00
Zdenek Kabelac
fcbef05aae doc: change fsf address
Hmm rpmlint suggest fsf is using a different address these days,
so lets keep it up-to-date
2016-01-21 12:11:37 +01:00
David Teigland
06346eab84 lvmlockd: cosemtic improvements to logging
Also pass our name to sanlock so it appears in
the sanlock status output.
2016-01-18 09:35:21 -06:00
David Teigland
95ead96004 lvmlockd: fix lvb validation for conversion
Make the lvb validation rules for convert match
those for unlock (even though it would be very
unlikely or impossible for convert to deal with
zero lvb.)
2016-01-18 09:35:20 -06:00
David Teigland
1752f5c31e lvmlockd: fixes for test mode
Get the test mode working (lvmlockd running with no
lock manager).
2016-01-14 16:01:29 -06:00
David Teigland
1b1f42b490 lvmlockd: fix exit code
libdaemon uses 1 for success
2016-01-13 16:40:02 -06:00
David Teigland
124b490fe6 lvmlockd: update VG lock version earlier
Have commands send lvmlockd the update message
in vg_write instead of vg_commit, so that it's
not done while LVs are suspended.  If the vg_write
is not committed, and the seqno sent to lvmlockd
is not used, then lvmlockd can detect this when
the next update uses the same seqno.
2015-12-15 16:14:49 -06:00
David Teigland
dcb26b5f13 lvmlockd: reconnect to lvmetad if it's restarted
If lvmetad is restarted after lvmlockd has connected
to it, then lvmlockd should reconnect.
2015-12-10 10:50:19 -06:00
David Teigland
d2d5191b78 lvmlockd: reverse some unnecessary checking
These are unnecessary or not useful.
2015-11-09 12:18:43 -06:00
David Teigland
6762eec88c lvmlockd: fix the NO_GL_LS condition
indicating when no global lockspace exists.
2015-11-09 11:33:16 -06:00
Zdenek Kabelac
b1215b7f8c lvmlockd: enforce 64bit arithmetic
Coverity suggest to stay on the 'safe' side and widen operators early
so 64bit offset is made from 64bit arithmentic.
2015-11-09 17:04:10 +01:00
Zdenek Kabelac
d6767d753f lvmlockd: add missing error checks
Detect error from function and report them.
2015-11-09 17:04:10 +01:00
Zdenek Kabelac
3db5ba08b1 cleanup: drop unneded headers
Coverity notices they are not really needed.
2015-11-09 17:04:10 +01:00
Zdenek Kabelac
32762e2a9c libdaemon: fix passing 32bit values for %d
Since %d is now prohibited for its great confusion,
replace it with  FMTd64 and correctly converted int64_t
parameter.
2015-11-09 17:04:10 +01:00
David Teigland
e207ededd6 lvmlockd: shut up warnings 2015-11-09 10:00:04 -06:00
David Teigland
df34fcdafd lvmlockd: use flag to avoid blocking in sanlock_acquire
If a host failed while holding a sanlock lease,
sanlock_acquire will by default block and wait
for the lease to expire before returning.  We
want it to return with an error so we can retry
instead of blocking, which allows us to process
other lock operations.

(Enclose this in an ifdef until the new flag
appears in a sanlock release.)
2015-10-14 14:39:29 -05:00
David Teigland
b7410c95cf lvmlockd: unlock lv if command fails before lock completes
If lvmlockd acquires an lv lock for a command, but the
command exits before the reply, then the command has
not activated the lv and lvmlockd should unlock it.
This only applies when the lv was not already locked.

(There will always be a chance that the lv lock is held
while the lv is not active, i.e. if the command fails in
the small window between getting the lv lock and before
doing the activation.  In that case, rerunning the
activation command corrects the inconsistency.)

This commit helps by automatically clearing the
inconsistency (lv locked by not activated) in the most
common case when the lv lock operation is slow to
complete and the command is canceled by the user.

This commit also adds and cleans up references to the
client id in a bunch of log messages, which is useful
to follow processing on each independent lock request.
2015-09-16 15:56:54 -05:00
David Teigland
6bc3d72a65 lvmlockd: prevent vgremove of dlm VG while lockspace is used
This applies the same rule/logic to dlm VGs that has always
existed for sanlock VGs.  Allowing a dlm VG to be removed
while its lockspace was still running on other hosts largely
worked, but there were difficult problems if another VG with
the same name was recreated.  Forcing the VG lockspace to
be stopped, gives both sanlock and dlm VGs the same behavior.
2015-09-11 14:12:13 -05:00
David Teigland
854a559a49 lvmlockd: remove shortcut for lockspace thread cleanup
This shortcut was added for an odd case that I do not
believe is relevant any more.  Having an alternate
path for lockspace thread cleanup is a complication
that could lead to problems.
2015-09-11 13:20:20 -05:00
David Teigland
18dfbbb150 lvmlockd: optimize dlm global lockspace creation
Set a flag indicating that the dlm global lockspace
exists to avoid going through the entire process of
trying to add it before finding it exists.
2015-09-11 13:20:01 -05:00
David Teigland
3670f095c7 lvmlockd: check all variations of lvb values
The dlm will often lose the lvb content, so we need to
check quite a few possibilities for lvb values that
were not being checked before.

Refactoring was required to pass the entire lvb value
back to the core code instead of the single value.

The only functional change should be detecting new
lvb states where metadata is now invalidated where
it wasn't before.
2015-09-10 09:47:26 -05:00
David Teigland
f11d690967 lvmlockd: flag for internal actions
When an action is created by lvmlockd for itself,
there is no client to send the result to.  Add
the NO_CLIENT flag to the action to skip sending
the result to a client.
2015-09-10 09:47:26 -05:00
David Teigland
15ae237d2c lvmlockd: rename ADOPT_CLIENT_ID
to INTERNAL_CLIENT_ID since it will be
used for more than adopting locks.
2015-09-10 09:47:26 -05:00
David Teigland
10ccbc5efa lvmlockd: don't stop lockspace for EREMOVED
Undo the part of the recent EREMOVED change which
automatically stopped the lockspace for a remotely
removed VG.  It didn't always work (would not work
when lvb content was rebuilt in the dlm).  This will
be handled better when the lvb content is controlled
more strictly.
2015-09-04 13:41:38 -05:00
David Teigland
c71af0895d lvmlockctl: update command descriptions and add logging
The one line descriptions will match the man page.

Add a syslog entry when enabling/disabling the global lock
to help debugging.
2015-09-04 11:05:13 -05:00
David Teigland
6240a7639d lvmlockd: fixes for starting dlm global lockspace
Remove the optimization/shortcut for starting the dlm global
lockspace when it was already running.

Reenable automatically starting the dlm global lockspace
when a command attempts to use it and it's not yet started.
This had become disabled at some point.
2015-09-03 16:47:54 -05:00
David Teigland
c27015368b lvmlockd: improve log messages for adding dlm global lockspace 2015-09-03 16:47:54 -05:00
David Teigland
8b6226997e lvmlockd: also use vg name in set_vg_info
Include both the VG uuid and name in the lvmetad
set_vg_info message.  This works around an obscure
problem where the VG uuid in lvmlockd is wrong
when one host removes a dlm VG, then creates a new
VG with the same name.  If the dlm lockspace for
the initial VG was never stopped on another host,
that other host will be using the old uuid in its
lvmetad set_vg_info message.  (That can be
corrected with a larger change, but this is an
effective workaround.)
2015-08-28 14:43:58 -05:00
David Teigland
3c1924c9c0 lvmlockd: fix starting dlm global lockspace
lvmlockd would fail to recognize that the global lockspace
failed to start if the dlm wasn't running, so future attempts
to start the dlm global lockspace would do nothing, thinking
it was already running.
2015-08-27 16:00:24 -05:00
David Teigland
e4d5d05119 lvmlockd: remove list of inactive lockspaces
This was only used to return two flags indicating specific
reasons for a lock failure so that a more specific error
message could be printed by the command (lockspace had been
stopped, or lockspace had an error starting.)

Remove the list, given its limited usefulness, the fact it
would easily become inaccurate, and the fact it was causing
misleading error messages.  The error conditions it was meant
to help could be reported differently.
2015-08-27 15:23:14 -05:00
David Teigland
58713d34dd lvmlockd: detect when dlm lvb is invalidated
The lvb content can be lost during dlm recovery,
and we need to detect when this happens to revalidate.
2015-08-27 10:27:24 -05:00
David Teigland
231b7df6cc lvmlockd: improve VG removal for lock_type dlm
This makes lvmlockd removal steps for dlm VGs closely match
sanlock VGs.  Because dlm lockspaces are not required to be
stopped on all hosts before vgremove, there is an extra bit
for dlm lockspaces, where a flag is set in the VG lock lvb
indicating that the VG was removed.  If other hosts happen
to use the VG lock they will see this flag and stop their
lockspace.
2015-08-27 10:27:24 -05:00
David Teigland
521136181b lvmlockd: fix to work around dlm lvb bug
Work around a dlm bug that fails to copy lvb
on a NL->EX conversion.
2015-08-27 10:27:24 -05:00
David Teigland
fda19b55b1 lvmlockd: fix dlm EAGAIN checks
libdlm returns EAGAIN in errno
2015-08-27 10:27:24 -05:00
David Teigland
1fae121b22 lvmlockd: fix sending debug info to lvmlockctl
Single messages sent over unix sockets are limited in
size to /proc/sys/net/core/wmem_max, so send the 1MB
debug buffer in smaller chunks to avoid EMSGSIZE.

Also look for EAGAIN and retry sending for a limited
time when the reader is slower than the writer.

Also shift the location of that code so it's the same
as other requests.
2015-08-20 14:07:11 -05:00
David Teigland
62a87c84ed lvmlockd: ignore cmd close if no locks were taken
When a command closes its connection, don't waste
time looking for locks to purge if it did not make
any lock requests.
2015-08-19 12:16:04 -05:00
David Teigland
ce2e60ab45 lvmlockd: change log_error to log_debug for non error
It's not uncommon for a command like vgchange -an to
deactivate and unlock LVs that were not active, so
don't lock that as an error.
2015-08-19 11:43:39 -05:00
David Teigland
9c5a85ce24 lvmlockctl: fix debug output 2015-08-18 16:49:33 -05:00
David Teigland
597de9d586 lvmlockd: add LV name to some debug logging
The LV uuid is used as the lock name, and including
the LV name in some log messages makes it easier to
follow log messages.
2015-08-10 15:07:10 -05:00
David Teigland
6bd5bf3cb5 lvmlockd: fix check for other sanlock lockspaces
The check for other sanlock lockspaces was not checking
that the lockspace type was sanlock, so if dlm lockspaces
were visible, they were wrongly included.
2015-08-10 13:16:04 -05:00
David Teigland
fd1782b5fc lvmlockd: handle loss of sanlock lease storage
This adds the infrastructure, code paths, error reporting,
etc. to handle storage errors, or storage loss, under the
sanlock leases in a VG that is being used.  The loss of
storage means sanlock cannot renew its leases, which means
that the host needs to stop using the shared VG before its
leases expire.

This still requires manually shutting down a VG that has
lost lease storage, e.g. unmounting file systems,
deactivating LVs in the VG.  The next step is to
automatically use a command like blkdeactivate to do that.
2015-08-05 10:21:45 -05:00
Peter Rajnoha
c78033233a coverity: return value check in lvmlockd-dlm
daemons/lvmlockd/lvmlockd-dlm.c:647: check_return: Calling "closedir" without checking return value (as is done elsewhere 13 out of 14 times).
2015-08-04 09:49:29 +02:00
Peter Rajnoha
83541123c8 coverity: fix cppcheck warnings
/lib/log/log.c:88: warning[invalidScanfArgType_int]: %llu in format string (no. 2) requires 'unsigned long long *' but the argument type is 'long long *'.
daemons/lvmlockd/lvmlockd-core.c:791: error[uninitstring]: Dangerous usage of 'version' (strncpy doesn't always null-terminate it).
2015-08-04 09:33:55 +02:00
David Teigland
d11f8d4228 lvmlockd: automatically remove the dlm global lockspace
The dlm global lockspace is automatically added when the
first dlm VG lockspace is added.  Reverse this by removing
the dlm global lockspace after the last dlm VG lockspace
is removed.  (Remove old non-working code that did this
based on an old command that could explicitly add/remove
the dlm global lockspace.)
2015-08-03 10:23:01 -05:00
David Teigland
78135c24b4 lvmlockd: small fixes and cleanup for lvmlockctl
. clean up the info output for readability
. remove some internal debug output
. fix the daemon quit option
2015-07-30 10:50:22 -05:00
David Teigland
9aabf441bd vgremove: warn when removing sanlock global lock
When the sanlock VG holding the global lock is removed,
print a warning indicating that the global needs to be
enabled in another sanlock VG.
2015-07-29 14:27:32 -05:00