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786 Commits

Author SHA1 Message Date
Peter Rajnoha
7d47d109b9 Add support for new oom killer adjustment interface (oom_score_adj). 
The filename to adjust the oom score was changed in 2.6.36.
We should use oom_score_adj instead of oom_adj (which is still
there under /proc, but it's scheduled for removal in August 2012).

New oom_score_adj uses a range from -1000 (OOM_SCORE_ADJ_MIN,
disable oom killing) to 1000 (OOM_SCORE_ADJ_MAX).
 2011-07-28 13:03:37 +00:00
Petr Rockai
1d9c083fcc lvmetad: Edit the MISSING_PV flags only after making a "reply" copy of the 
metadata, which is then serialised and discarded. This fixes a couple of
outstanding TODO items about handling the MISSING flags correctly.
 2011-07-25 17:59:50 +00:00
Petr Rockai
059ee25951 lvmetad: Check integrity of multiple metadata copies, i.e. ensure that seqno 
equality implies metadata equality. Signal error in response to any update
requests that try to overwrite metadata without providing a higher seqno.
 2011-07-25 15:51:51 +00:00
Petr Rockai
9474992482 lvmetad: A couple of TODOs, and fix a few trivial memory leaks. 2011-07-25 15:33:04 +00:00
Petr Rockai
c2ca1a707a lvmetad: Obliterate vg_status by returning the same information from 
update_pv_status, saving a dozen lines of code and execution time of one
walkthrough of the PV list.
 2011-07-20 21:33:41 +00:00
Petr Rockai
bc0a902434 lvmetad: Fix a possible infinite loop in vg_status. 2011-07-20 21:27:28 +00:00
Petr Rockai
fba6c62b84 lvmetad: Robustify update_pv_status and remove an useless lookup. 2011-07-20 21:26:18 +00:00
Petr Rockai
0cfb99d385 First stab at making lvmetad-core threadsafe. The current design should allow 
very reasonable amount of parallel access, although the hash tables may become
a point of contention under heavy loads. Nevertheless, there should be orders
of magnitude less contention on the hash table locks than we currently have on
block device scanning.
 2011-07-20 21:23:43 +00:00
Petr Rockai
dcbf5a3b5d lvmetad: Avoid stale PV -> VG mappings on metadata update. 2011-07-20 18:45:32 +00:00
Petr Rockai
cd7bca83e1 Optimise PV -> VG lookups by using a UUID (hash) map. 2011-07-20 18:34:57 +00:00
Petr Rockai
652e0757c9 Free up allocated memory before exiting, in lvmetad. 2011-07-20 18:24:49 +00:00
Petr Rockai
a720420466 Fix two small (but eventually unbounded) leaks in daemon-server.c. 2011-07-20 18:23:33 +00:00
Petr Rockai
42e23dbf6c Can't have a global memory pool in lvmetad (that would constitute an ongoing 
memory leak) => remove it (it's been unused anyway).
 2011-07-20 16:49:21 +00:00
Petr Rockai
50ff3c076e Make lvmetad also report VGID in reply when adding a PV without MDAs (this 
obviously only works for VGs that already had at least some MDA discovered).
 2011-07-20 16:46:40 +00:00
Petr Rockai
4eb53158e5 Add code to lvmetad's testclient that scans an actual physical device, 
effectively emulating a future "pvscan --lvmetad" command.
 2011-07-20 15:15:41 +00:00
Petr Rockai
c33d33bab7 Make lvmetad report the VG ID and status (complete, partial) in reply to pv_add 
requests.
 2011-07-20 15:14:17 +00:00
Petr Rockai
2ef620ec7f Towards MISSING (PV) flag management in lvmetad. 2011-07-19 19:15:22 +00:00
Petr Rockai
3c238baf03 Work out some more details in metadata update in lvmetad. 2011-07-19 16:48:13 +00:00
Petr Rockai
9796bd4db6 More work on cache maintenance code in lvmetad: keep track of PV status. 2011-07-19 14:13:59 +00:00
Petr Rockai
252853560c Start filling in the core LVMetaD functionality and the corresponding 
testclient bits.
 2011-07-18 14:48:30 +00:00
Petr Rockai
372e9b3d64 Various improvements to the daemon-common code, including automated response 
formatting from config trees provided by the daemon implementation.
 2011-07-18 14:46:54 +00:00
Petr Rockai
aac236f4a8 Improve format_buffer in daemon-shared.c, adding block formatting in addition 
to string/integer (this propagates to the *simple* family of request/response
functionality).
 2011-07-18 14:42:44 +00:00
Alasdair Kergon
730cfc74b8 move doc to doc dir 2011-07-08 18:55:28 +00:00
Alasdair Kergon
c837830f6a report which dev was not found 2011-07-08 12:35:48 +00:00
Petr Rockai
14e012871f Differentiate the request and response format, in daemon/common. 2011-06-29 22:20:14 +00:00
Zdenek Kabelac
88fca3eff4 Annotate CLVMD_CMD_SYNC_NAMES in decode_cmd 2011-06-28 13:42:15 +00:00
Petr Rockai
94bb67ab37 Add int/str lookup routines specific to the reply (in client) and request (in 
server) for nicer-looking code (thin wrapping around find_config_{int,str}).
 2011-06-27 14:03:58 +00:00
Petr Rockai
aaca7f111f Also parse the config_tree on the client end (daemon-client.c). 2011-06-27 13:58:11 +00:00
Petr Rockai
55e300716f Parse the incoming config tree in daemon-server.c, providing the 
daemon-specific handler with a struct config_tree pointer to look things up in.
 2011-06-27 13:46:45 +00:00
Petr Rockai
9925977b07 LVMetaD build hack: link to lvm-internal &c. and add a simple test script. 2011-06-27 13:44:33 +00:00
Petr Rockai
4fcbeed6ef Implement daemon_send_simple and use it in the testclient. 2011-06-27 13:15:49 +00:00
Petr Rockai
308963261c Do not open the socket with SOCK_NONBLOCK in daemon-client, since we have no 
use for that behaviour (at least for now).
 2011-06-27 13:14:53 +00:00
Petr Rockai
ea32ca07e7 Call daemon_close before exit in the testclient. 2011-06-27 12:27:34 +00:00
Petr Rockai
5c1706e3ef Sketch out the actual on-wire format in daemon-client.h documentation, and add 
a simplified send interface.
 2011-06-27 12:26:54 +00:00
Petr Rockai
acf3616b3a Add a skeleton for lvmetad, a test client, and a temporary Makefile to build 
them. These are currently mostly for testing the daemon-common code. LVMetaD
functionality is expected to trickle in soon though.
 2011-06-14 02:36:38 +00:00
Petr Rockai
92658f5661 Common daemon code: Implement basic socket-based communication infrastructure 
(both client and server side). The server handles each connection in a separate
thread.
 2011-06-14 02:34:18 +00:00
Alasdair Kergon
df390f1799 Major pvmove fix to issue ioctls in the correct order when multiple LVs 
are affected by the move.  (Currently it's possible for I/O to become
trapped between suspended devices amongst other problems.

The current fix was selected so as to minimise the testing surface.  I
hope eventually to replace it with a cleaner one that extends the
deptree code.

Some lvconvert scenarios still suffer from related problems.
 2011-06-11 00:03:06 +00:00
Peter Rajnoha
554923e0ae Fix a few compile warnings. 
clvmd-command.c:84:2: warning: implicit declaration of function ‘init_test’
lvm-functions.c:141:3: warning: too many arguments for format
 2011-06-03 09:05:30 +00:00
Milan Broz
7c1a2417f5 Use /var/run/lvm for lvmetad socket. 2011-06-02 08:58:05 +00:00
Alasdair Kergon
0ebd0960b4 Propagate test mode to clvmd to skip activation and changes to held locks. 2011-06-01 21:16:55 +00:00
Petr Rockai
ba7d33be9c Mention code layout in lvmetad DESIGN. 2011-05-23 14:46:48 +00:00
Petr Rockai
dc85d3fb57 More work on the common daemon framework. Make things compile, too. 2011-05-15 11:02:29 +00:00
Petr Rockai
73ffd6e748 More scavenging of common daemon code, this time the clvmd local socket setup 
sequence.
 2011-05-13 09:34:12 +00:00
Petr Rockai
d7448a721b Start filling in some of the common daemon (server-side) functionality, taking 
dmeventd code as a starting point.
 2011-05-13 08:45:46 +00:00
Petr Rockai
04507b0ace First go at the lvmetad client-side interface. 2011-05-13 08:17:26 +00:00
Petr Rockai
56517bad21 First stab at the prototypes of the daemon-common functionality (to be 
eventually shared by dmeventd, lvmetad and clvmd).
 2011-05-13 08:07:28 +00:00
Petr Rockai
f03e3ac15b Initial design document for LVMetaD, building on the draft from June of last 
year, incorporating the outcomes of today's and yesterday's discussions.
 2011-05-12 17:49:46 +00:00
Petr Rockai
eee66d2a80 When glibc needs buffers for line buffering of input and output buffers, it 
allocates these buffers in such way it adds memory page for each such buffer
and size of unlock memory check will mismatch by 1 or 2 pages.

This happens when we print or read lines without '\n' so these buffers are
used. To avoid this extra allocation, use setvbuf to set these bufffers ahead.

Signed-off-by: Zdenek Kabelac <zkabelac@redhat.com>
Reviewed-by: Milan Broz <mbroz@redhat.com>
Reviewed-by: Petr Rockai <prockai@redhat.com>
 2011-05-07 13:50:11 +00:00
Zdenek Kabelac
a1eba521e3 Fix some unmatching sign comparation gcc warnings 
Simple replacement for unsigned type - usually in for() loops.
 2011-04-08 14:40:18 +00:00
Zdenek Kabelac
6b7fe2852a Use dm_snprintf 
and fix differently signed comparation.
 2011-04-08 14:18:40 +00:00