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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
When some target is passing empty parameters to some dm target,
report this as an internal error to better catch some broken
table construction (some mirror conversions seem to be doing
this for now).
This fn calls rm_dev_node directly - an exceptional case. It needs to check
the DM_UDEV_DISABLE_LIBRARY_FALLBACK flag directly (it's called in dm_task_run
normally where it's checked already).
and use this for the LVM critical section logic. Also report an error if
code tries to load a table while any device is known to be in the
suspended state.
(If the variety of problems these changes are showing up can't be fixed
before the next release, the error messages can be reduced to debug
level.)
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.
Align strdup char* allocation just on 2 bytes.
It looks like wasting space to align strings on 8 bytes.
(Could be even 1byte - but for hashing it might eventually get better
perfomance - but probably hardly measurable).
TODO: check on various architectures it's not making any problems.
Avoid locking sum testing with valgrind compilation.
Make memory unaccessible in the valgrind for dm_pool_abadon_object.
Valgrind hinting should not be needed in _free_chunk for dm_free.
LVM doesn't behave correctly if running as non-root user,
there is warning when it detects it.
Despite this, it produces many error messages, saying nothing.
See https://bugzilla.redhat.com/show_bug.cgi?id=620571
This patch fixes two things:
1) Removes eror message from device_is_usable() which has no
information value anyway (real warning is printed inside it).
2) it fixes device-mapper initialization, if we support
core dm module autoload and device node is present, it should
fail early and not try recreate existing and correct node.
(non-root == permission denied here)
N.B. In future code should support user roles, some more
drastic checks in code are probably contraproductive now.
dm_hash binary functions takes void* key - so there is no need to cast
pointers to char* (also the hash key does not have trailing '\0').
This is slight API change, but presents no change for the API user side
it just allows to write code easier as the casting could be removed.
When the ->params string is empty - memory access is made on the byte
before allocated buffer (catched by valgrind) - in the case it would
constain 0x20 - it would even overwrite this buffer.
So fix by checking len > 0 before doing such access.
Also slightly optimise this loop from repeated strlen call.
