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193 Commits

Author SHA1 Message Date
Petr Rockai
cf1b05e7dd Beef up the lvmetad code with more functionality and a bunch of bugfixes. There 
used to be a few mis-ordered memory accesses (release and access in the next
block). Fix that set_flag could have sometimes corrupted the flags being
modified.

A few issues with metadata tracking are sorted out as well now, and there are
only a few problems remaining before we can integrate lvmetad, mostly on the
client side:

- metadata areas need to be tracked in lvmetad (most likely to be addressed
  through an extension of metadata, meaning no special support in lvmetad would
  be needed)
- non-udev scanning code needs to be taught about telling lvmetad about device
  disappearance (pvscan most importantly)
- this last item also needs to mesh with metadata inconsistencies and
  suddenly-incomplete volume groups (aux disable_dev in tests); udev-based
  scanning should address this separately and more elegantly
 2012-01-16 08:25:32 +00:00
Petr Rockai
f401655ee8 Fix up lvmetad for the minor API change in dm_config_create. 2011-12-18 22:31:10 +00:00
Alasdair Kergon
594753751a Only use built-in stack size in clvmd - ignore lvm.conf. 2011-12-08 21:24:08 +00:00
Zdenek Kabelac
ade2b9345f Cleanup for lvmetad passing uninit structure 
Shown by clang analyzer.
 2011-10-30 21:58:59 +00:00
Zdenek Kabelac
13dd31381c Use Makefile for daemmons/common library. 
Next iteration for better fit of lvmetad compilation.

Move build of libdaemon.a into common subdir Makefile.
libdaemon.a is device-mapper target.

Build and install lvmetad as lvm2 target.
 2011-09-24 20:57:49 +00:00
Zdenek Kabelac
11dd5cf2aa Few more updates to lvmetad build deps 
It seem lvmetad deps must be expressed after the include.
Also adding lvmetad deps to device-mapper target in daemons dir.
 2011-09-19 00:29:11 +00:00
Zdenek Kabelac
de154812a9 Build fixes for lvmetad 
Should now be giving better build order and install lvmetad.
 2011-09-17 14:50:22 +00:00
Zdenek Kabelac
1b8724d866 Fix for gcc compilation warnings 
and put _XOPEN_SOURCE so pthread_mutexattr is properly defined.
 2011-09-17 13:33:51 +00:00
Zdenek Kabelac
49cd515cd2 Compile fix 
Reflecting change in dm_config_value  float r -> float f.
 2011-09-02 11:04:12 +00:00
Petr Rockai
e68a6fbf20 Fix warnings and constness handling in lvmetad-core (adjusting the 
dm_config_find_node to give non-const node pointer, since that better reflects
the contract of that function).
 2011-08-31 12:39:58 +00:00
Petr Rockai
d008fc86a0 Get rid of the old lvmetad Makefile. 2011-08-31 11:44:27 +00:00
Petr Rockai
615534d305 A compromise integration of LVMetaD into the build: I have kept all the 
daemon/common code in a single libdaemon.a, which is completely private. This
is currently linked into the lvmetad binary, and will be linked into LVM (the
client part, since static linking only picks up only symbols that are actually
used). I have also added --enable/disable-lvmetad to ./configure; although the
current default is off, I expect this to be flipped to on shortly. There's no
LVM-side support yet, but when there is, even when built, it'll still need to
be enabled by an lvm.conf option.
 2011-08-31 11:31:57 +00:00
Petr Rockai
04e647aa84 Adapt LVMetaD to use the new dm_config interfaces. 2011-08-30 15:44:01 +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
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
Alasdair Kergon
730cfc74b8 move doc to doc dir 2011-07-08 18:55:28 +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
ea32ca07e7 Call daemon_close before exit in the testclient. 2011-06-27 12:27:34 +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
Milan Broz
7c1a2417f5 Use /var/run/lvm for lvmetad socket. 2011-06-02 08:58:05 +00:00
Petr Rockai
ba7d33be9c Mention code layout in lvmetad DESIGN. 2011-05-23 14:46:48 +00:00
Petr Rockai
04507b0ace First go at the lvmetad client-side interface. 2011-05-13 08:17:26 +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