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Commit Graph

18 Commits

Author SHA1 Message Date
Jonathan Brassow
4047e4dfb1 RAID: Add support for RAID10
This patch adds support for RAID10.  It is not the default at this
stage.  The user needs to specify '--type raid10' if they would like
RAID10 instead of stacked mirror over stripe.
2012-08-24 15:34:19 -05:00
Zdenek Kabelac
54b2aadf40 Revert free of allocated segtype
lvm_register_segtype takes ownership of segtype and call destructor
for it in error path.
2012-02-28 14:23:41 +00:00
Zdenek Kabelac
e1153fd385 Test seg pointer for non-null
As the function accepts NULL for 'seg' parameter,
check for it before dereference.
2012-02-27 10:15:08 +00:00
Jonathan Earl Brassow
ad48a46fc9 Make conversion from a synced 'mirror' to 'raid1' not cause a full resync.
It was not possible to pass down the DM_[FORCE|NO]SYNC flags to
'dm_tree_node_add_raid_target'.  This meant that converting to 'raid1' from
'mirror' would cause a full resync.  (It also meant that '--nosync' was
ineffective when creating a 'raid1' LV.)

I've taken the 'reserved' parameter in 'dm_tree_node_add_raid_target' and
used it for the "flags" parameter.  Now it is possible to pass the sync
flags and any other flags that may come up.
2012-02-13 20:13:39 +00:00
Zdenek Kabelac
a980f56d2a Free allocated segment type in error path 2012-01-25 21:54:00 +00:00
Jonathan Earl Brassow
0c506d9a40 Support the ability to replace specific devices in a RAID array.
RAID is not like traditional LVM mirroring.  LVM mirroring required failed
devices to be removed or the logical volume would simply hang.  RAID arrays can
keep on running with failed devices.  In fact, for RAID types other than RAID1,
removing a device would mean substituting an error target or converting to a
lower level RAID (e.g. RAID6 -> RAID5, or RAID4/5 to RAID0).  Therefore, rather
than removing a failed device unconditionally and potentially allocating a
replacement, RAID allows the user to "replace" a device with a new one.  This
approach is a 1-step solution vs the current 2-step solution.

example> lvconvert --replace <dev_to_remove> vg/lv [possible_replacement_PVs]

'--replace' can be specified more than once.

example> lvconvert --replace /dev/sdb1 --replace /dev/sdc1 vg/lv
2011-11-30 02:02:10 +00:00
Zdenek Kabelac
f1ab501a58 Fix log_error() usage
Cosmetic - skip <bactrace> when error has been just printed in raid segtype.
Add missing log_error if allocation would fail for unknown segtype.
2011-09-24 21:19:30 +00:00
Petr Rockai
97a4b5165e Replace const usage of dm_config_find_node with more appropriate value-lookup
functionality. A number of bugs (copied and pasted all over the code) should
disappear:

- most string lookup based on dm_config_find_node would segfault when
  encountering a non-zero integer (the intention there was to print an
  error message instead)
- check for required sections in metadata would have been satisfied by
  values as well (i.e. not sections)
- encountering a section in place of expected flag value would have
  segfaulted (due to assumed but unchecked cn->v != NULL)
2011-08-31 15:19:19 +00:00
Petr Rockai
e59e2f7c3c Move the core of the lib/config/config.c functionality into libdevmapper,
leaving behind the LVM-specific parts of the code (convenience wrappers that
handle `struct device` and `struct cmd_context`, basically). A number of
functions have been renamed (in addition to getting a dm_ prefix) -- namely,
all of the config interface now has a dm_config_ prefix.
2011-08-30 14:55:15 +00:00
Alasdair Kergon
f9b92564a7 Fix raid shared lib segtype registration (2.02.87). 2011-08-24 13:41:46 +00:00
Alasdair Kergon
3250b38583 _ for static fns 2011-08-19 15:59:15 +00:00
Jonathan Earl Brassow
f439e65b64 Add support for m-way to n-way up-convert in RAID1 (no linear to n-way yet)
This patch adds the ability to upconvert a raid1 array - say from 2-way to
3-way.  It does not yet support upconverting linear to n-way.

The 'raid' device-mapper target allows for individual components (images) of
an array to be specified for rebuild.  This mechanism is used when adding
new images to the array so that the new images can be resync'ed while the
rest of the images in the array can remain 'in-sync'.  (There is no
mirror-on-mirror layering required.)
2011-08-18 19:41:21 +00:00
Jonathan Earl Brassow
4903b85d23 Compiler warning fixes, better error messaging, and cosmetic changes.
1) add new function 'raid_remove_top_layer' which will be useful
to other conversion functions later (also cleans up code)
2) Add error messages if raid_[extract|add]_images fails
3) Add function prototypes to prevent compiler warnings when
compiling with '--with-raid=shared'
2011-08-13 04:28:34 +00:00
Jonathan Earl Brassow
a22515c87f Various code clean-ups (s/malloc/zalloc/, new msgs, etc)
Fix a couple more issues that kabi found.
- Add some error messages in failure cases
- s/malloc/zalloc/
- use vg->vgmem for lv names instead of vg->cmd->mem
2011-08-11 21:32:18 +00:00
Jonathan Earl Brassow
34338a3406 Need 'ifdef' checks around RAID monitoring functions as well to catch the
case where the user does not want dmeventd support compiled in.
2011-08-11 14:00:58 +00:00
Milan Broz
26303811a4 Fix build of raid without dmeventd. 2011-08-11 13:30:36 +00:00
Jonathan Earl Brassow
3041b72f06 Add dmeventd monitoring for RAID devices. 2011-08-11 05:00:20 +00:00
Jonathan Earl Brassow
cac52ca4ce Add basic RAID segment type(s) support.
Implementation described in doc/lvm2-raid.txt.

Basic support includes:
- ability to create RAID 1/4/5/6 arrays
- ability to delete RAID arrays
- ability to display RAID arrays
Notable missing features (not included in this patch):
- ability to clean-up/repair failures
- ability to convert RAID segment types
- ability to monitor RAID segment types
2011-08-02 22:07:20 +00:00