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Commit Graph

156 Commits

Author SHA1 Message Date
Zdenek Kabelac
341055ddb3 cleanup: clvmd use struct initializers
Simplify code, and use compiler capability to
initilize struct members on its own.
2014-03-10 12:24:10 +01:00
Zdenek Kabelac
c44ede31a3 cleanup: clvmd use else if
When string already matches, skip rest of tests.
2014-03-10 12:24:09 +01:00
Zdenek Kabelac
2cfe0840d2 cleanup: clvmd assign NULL to pointers
Use NULL when assigning to void*.
2014-03-10 12:24:09 +01:00
Zdenek Kabelac
c824369fbd cleanup: clvmd indent changes
Improve readbility of clvmd code.
Remove some unneeded braces.
2014-03-10 12:24:09 +01:00
Zdenek Kabelac
109564d6a5 cleanup: clvmd simplify loops
Rewrite write loops to be more readable.
2014-03-10 12:24:09 +01:00
Zdenek Kabelac
3d23404081 cleanup: clvmd rewrite send_message
Improve readability of code and make it clear what it tries
to achieve.
2014-03-10 12:24:09 +01:00
Zdenek Kabelac
460c19df62 clvmd: fix memleak on exit
This patch will releases allocated private resources from
startup. Needs previous dm_zalloc patch to ensure unset
private pointer is NULL.

TODO: check on real cluster.
2014-03-10 12:21:32 +01:00
Zdenek Kabelac
38ce06e448 clvmd: use dm_zalloc for socket allocation
Instead of doing individual settings for struct members,
ensure whole struct is in defined state.
2014-03-10 12:20:49 +01:00
Zdenek Kabelac
50e1fad86a cleanup: use matching signed types 2013-11-28 12:47:51 +01:00
David Teigland
4c0db84948 clvmd: fix verify message rejection of REMOTE flag
This fixes a bug in commit 19baf842 where verify_message
was rejecting the CLVMD_FLAG_REMOTE flag.  It was missed
since the patch was ported from an lvm version where that
flag does not exist.
2013-10-24 11:18:22 -05:00
Petr Rockai
25bed99681 clvmd: Avoid a 3-way deadlock in dead-client cleanup. 2013-09-18 21:17:48 +02:00
Peter Rajnoha
0563bd0037 fix: some issues reported by coverity
- null_fd resource leak on error path in _reopen_fd_null fn
  - dead code in verify_message in clvmd code
  - dead code in _init_filter_components in toolcontext code
  - null dereference in dm_prepare_selinux_context on error path if
    setfscreatecon fails while resetting SELinux context
2013-08-15 12:23:49 +02:00
Zdenek Kabelac
7b1315411f clmvd: fix decriptor leak on restart
Do not leave descriptor used for dup2() openned.
2013-08-06 16:20:36 +02:00
David Teigland
19baf84290 clvmd: verify messages before processing
Check that fields in clvm_header are valid when
local or remote messages are received.  If not,
log an error, dump the message data and ignore
the message.
2013-08-02 09:55:54 -05:00
Zdenek Kabelac
d38af2857f cleanup: cast to len's type
Cleanup different signess gcc warning.
2013-04-21 23:14:05 +02:00
Zdenek Kabelac
5070ffbca7 clvmd: avoid logging in signal handler
debuglog in the main thread.
2013-04-21 22:56:59 +02:00
Zdenek Kabelac
0125518d6d clvmd: preserve foreground mode across restart
Keep clvmd in foreground when restarted.
Useful for testing.
2013-04-21 22:56:48 +02:00
Zdenek Kabelac
8bcc1da2f3 locales: use higher prio LC_ALL variable
For reseting locale environment into significantly less memory
consuming version 'C' - use LC_ALL instead of LANG since it has
higher priority in locale settings.

Otherwise we may observe whole locale-archive which might be
over 100MB on i.e. Fedora systems locked in memory with
some daemons.
2013-01-22 11:25:02 +01:00
Zdenek Kabelac
1d774e5667 cleanup: drop test for optarg NULL
Since -d takes an argument, we do not need to check for
optarg being NULL here.
2012-12-15 14:57:40 +01:00
Zdenek Kabelac
13fe333b54 clvmd: fix parsing of -d argument
clvmd -d option parsing was not working properly.

clvmd -d 2   (with space) has been ignored because of
'::' used in getopt string, and as failsafe it's been used '1'.

Later this debug_arg has been ignored and debug_opt was used
instead which happend to have value '1'.

Submitted-by: Robert Milasan <rmilasan at suse.com>
Reported-by: Robert Milasan  <rmilasan at suse.com>
2012-10-19 15:35:56 +02:00
Zdenek Kabelac
c6f680ee49 clvmd,lvmetad: check for fcntl result
Report any problem of fcntl.
2012-08-23 14:38:48 +02:00
Zdenek Kabelac
59ca324c35 clvmd: release excl_uuid hash
Release allocated hash before exit.
2012-08-23 14:34:56 +02:00
Zdenek Kabelac
6f3cd63551 cleanup: replace memset with struct initilization
Simplifies the code, properly detects too long socket paths,
drops unused parameter.
2012-06-22 13:23:03 +02:00
Milan Broz
61a1effcf1 Avoid closing clvmd socket twice. 2012-03-27 16:59:28 +00:00
Zdenek Kabelac
4ea8533f30 Make sure namelen fits into buffer allocated on stack 2012-03-23 09:43:44 +00:00
Zdenek Kabelac
f3c177312f Correct enum type
Using debug_t and some forgetten alloc_policy_t, force_t from past commit.
2012-03-01 21:14:43 +00:00
Zdenek Kabelac
c452307543 Few more close and dev_close trace
Adding (void) where we cannot really report an error.
2012-03-01 21:12:37 +00:00
Zdenek Kabelac
bd046f0201 Ensure clvmd message is always \0 terminated
Drop whole buffer clearing (most messages at <100 bytes).
Just make sure we have always \0 terminated string for strlen() operations.
(before for PIPE_BUF sized messages this was not set).
2012-02-28 11:06:56 +00:00
Zdenek Kabelac
e5d399f667 Missed to properly merge patch for definition of MAX_MISSING_LEN
(fix previous commit)
2012-02-28 10:42:20 +00:00
Zdenek Kabelac
4d44893d60 Add log_sys_error for close 2012-02-28 10:14:06 +00:00
Zdenek Kabelac
696052b78e Limit max size of clvmd message
This could be seen as some sort of simple validation - it's not easy to
recognize a valid message for now - but we definitely do not want to
allocate a lot of megabytes in  clvmd memory locked daemon when broken
message gets in.

Size of 8000 is just selected for now - possibly there could be much
lower value put in.
2012-02-28 09:58:19 +00:00
Zdenek Kabelac
782a37e411 Do not send uninitilised bytes
Use struct initalizers to fill struct members and at the same time have
all unspecified members set to 0.
2012-02-28 09:53:55 +00:00
Zdenek Kabelac
8918bf2430 Add some log_sys_errors to close() call 2012-02-27 11:28:47 +00:00
Zdenek Kabelac
75f8f3ce8b Nicer cleanup of excl_uuid hash
Since it on exit path, it's not a big difference,
but makes less noise in analyzer and valgrind.
2012-02-27 11:26:25 +00:00
Zdenek Kabelac
25555737bd A bit more safe version of sprintf
Use just buffer size limit (it's used for debug only)
2012-02-27 10:17:06 +00:00
Zdenek Kabelac
7e25b8f932 Drop uname call, it's not used from gulm era. 2012-02-27 09:58:18 +00:00
Zdenek Kabelac
cdcf7aaf07 A bit more readable code
Just a minor readability conversion.
2012-02-08 13:03:40 +00:00
Zdenek Kabelac
eb2dd721ab Oops missed braces in previous commit
This has disabled clvmd for being executed.
(FIXME improve testing part to catch this fault)
2012-01-26 17:55:55 +00:00
Zdenek Kabelac
4125cf5067 Fix leak of hash table
Minor leak on command initialization.
2012-01-25 22:36:33 +00:00
Alasdair Kergon
cab1c8ade1 Add CLVMD_FLAG_REMOTE to skip processing on local node. 2012-01-21 05:31:54 +00:00
Zdenek Kabelac
5ba3b21921 Remove unused variables 2011-10-11 10:06:57 +00:00
Zdenek Kabelac
1ba44957bf Add some fixme locking
Code here is using thread write protected variable without locking.
So add locking, for proper synchronization and a FIXME, since the
code needs closer look.
2011-10-11 09:56:44 +00:00
Zdenek Kabelac
8a706f836d Simplify worker loop
Do not reacquire mutex several times without a real reason.
Code readability is also better.
2011-10-11 09:54:39 +00:00
Zdenek Kabelac
96de8adcc9 Use barrier instead of mutex
Barrier is supposed to be used in situation like this
and replace tricky mutex usage, where mutex has been unlocked
by a different thread than the locking thread.
2011-10-11 09:26:04 +00:00
Zdenek Kabelac
61a45c7b3a Add FIXMEs for init_test
Usage of thread unprotected init_test is not correct and needs probably lvm lock
since it part of lvm library. Current implementation may probably fail with
test mode and actually create something unexpectedly (and vice versa).
2011-10-11 09:23:48 +00:00
Zdenek Kabelac
0448a9265a Limit thread stack
Since default thread stack size is around 8MB and clvmd creates for now thread
for message, clvmd may easily reach multi GB size of in-memory locked pages
(runs with mlockall()).

This patch significantly reduces memory usage to just tens of MB,
and now different reasons are the cause of server overloading.
Now we are running out of free file descriptors mostly.
2011-10-11 09:18:49 +00:00
Zdenek Kabelac
a039e204e7 CLVMD bugfix support for args -S -E
Bugfix:
Add (most probably unfinished) support for -E arg with list of exclusive
locks.  (During clvmd restart all exclusive locks would have been lost and
in fact, if there would have been an exclusive lock, usage text would be
printed and clvmd exits.)

Instead of parsing list options multiple times every time some lock UUID is
checked - put them straight into the hash table - make the code easier to
understand as well.

Remove  was_ex_lock() function (replaced with dm_hash_lookup()).

Swap return value for get_initial_state() (1 means success).

Update man pages and usage info for -E option.
2011-09-24 20:48:34 +00:00
Milan Broz
63b8ed7c37 Fix clvmd processing of invalid request on local socket. (rommer)
Code now detects small packet and wrong arglen and reply with
error intead of infinite loop.

https://bugzilla.redhat.com/show_bug.cgi?id=738484
2011-09-16 14:40:06 +00:00
Alasdair Kergon
d8b1aa198b more pre-release fixes 2011-08-12 02:16:46 +00:00
Milan Broz
fc438d74b7 Never ever use uninitialised descriptors if pipe() fails
(because of maximum open count fd exceeded or so).

Better return busy message, so even clients fail in more controlled way.

Without patch,  clvmd crashes with various strange backtraces
if under heavy load of connection requests.

https://bugzilla.redhat.com/show_bug.cgi?id=698393
https://bugzilla.redhat.com/show_bug.cgi?id=697945

(It still can OOM but that's different issue.)
2011-08-11 12:57:10 +00:00