1
0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-22 17:35:59 +03:00
Commit Graph

13728 Commits

Author SHA1 Message Date
Zdenek Kabelac
bdfc96cb08 raid: fix activation of tracked image
Activation of raid has brough up also splitted image with tracing
(without taking lock for this).

So when raid is now activate - such image is not put into
table (with _rmeta).  When user needs such device, just active it.
2016-12-18 19:10:38 +01:00
Bryn M. Reeves
a15f0d181c dmstats: don't declare _start_timestamp if HAVE_SYS_TIMERFD_H
The _start_timestamp is not used by the TIMERFD clock.
2016-12-18 14:08:11 +00:00
Bryn M. Reeves
3e53adf7c0 dmstats: fix TIMERFD _timer_running() test 2016-12-18 14:07:25 +00:00
Bryn M. Reeves
5a4750d76c dmstats: fix interval number reporting with --count=0
When --count=0 interval numbers are miscalculated:

Interval     #18446744069414584325     time delta:    999920887ns
Interval     #18446744069414584325   current err:       -79113ns
End interval #18446744069414584325  duration:    999920887ns

This is because the command line argument is cast through the
uint32_t type, and fixed to UINT32_MAX:

  _count = ((uint32_t)_int_args[COUNT_ARG]) ? : UINT32_MAX;

We also need to handle --count=0 specially when calculating the
interval number: since intervals count from #1, this must account
for the implicit "minus one" when converting from zero to the
UINT64_MAX value used (which is too large to store in _int_args).
2016-12-18 13:03:45 +00:00
Bryn M. Reeves
5635cd3b03 dmstats: separate TIMERFD and useleep() exit conditions
The time management code mixes tests of the _timer_fd value with
code that should be timer agnostic: this causes problems for users
of the usleep() timer, since it cannot properly detect the start
of a new interval:

Beginning first interval
Interval     #18446744069414584348     time delta:   1000000000ns
Interval     #18446744069414584348   current err:            0ns
End interval #18446744069414584348  duration:   1000000000ns
Adjusted sample interval duration:   1000000000ns
[...]
Beginning first interval
Interval     #18446744069414584349     time delta:   1000000000ns
Interval     #18446744069414584349   current err:            0ns
End interval #18446744069414584349  duration:   1000000000ns
Adjusted sample interval duration:   1000000000ns

Separate these out, by defining a _timer_running() call that each
timer implements, and only define _timer_fd if we are compiling
with TIMERFD enabled.
2016-12-18 13:03:44 +00:00
Bryn M. Reeves
886b4f755d dmstats: use better interval estimate for usleep() timer
Although the usleep() interval timer is not used if the Linux
TIMERFD interface is available it should still provide reasonably
good timing.

Instead of trying to estimate the error from the duration of the
last sleep, peg it to the start time of the program, and use the
value of  ((start_time - now) % interval) to correct the current
interval duration.

This always pulls us back into sync at the end of each interval,
rather than relying on trying to incrementally adjust the time
duration at each interval start.

This greatly reduces drift when the usleep() clock is used.
2016-12-18 13:03:44 +00:00
Bryn M. Reeves
68ec42ebaf dmstats: improve tool help output and option coverage 2016-12-18 11:51:13 +00:00
Bryn M. Reeves
4f9d901c71 man: fix 'dmstats create' formatting in dmstats.8.in 2016-12-18 10:23:12 +00:00
Bryn M. Reeves
14be8c4fad man: fix 'dmstats list' option formatting in dmstats.8.in 2016-12-18 10:12:56 +00:00
Bryn M. Reeves
25dd3988c3 man: fix 'dmstats <command>' formatting in dmstats.8.in 2016-12-18 10:12:45 +00:00
Bryn M. Reeves
35791689ba libdm: use destination size as limit in dm_bit_copy()
The dm_bit_copy() macro uses the source (bs1) bitset size as the
limit for memcpy:

    memcpy((bs1) + 1, (bs2) + 1, ((*(bs1) / DM_BITS_PER_INT) + 1)..)

This is safe if the destination bitset is smaller than the source,
or if the two bitsets are of the same size.

With a destination that is larger (e.g. when resizing a bitmap to
add more capacity), the memcpy will overrun the source bitset and
set garbage bits in the destination.

There are nine uses of the macro currently (8 in libdm/regex, and
1 in daemons/cmirrord): in each case the two bitsets are always of
equal size so the behaviour is unchanged.

Fix the macro to use bs2's size to simplify resizing bitsets and
avoid the need for another copy macro.
2016-12-14 11:28:11 +00:00
Zdenek Kabelac
0f98d5c2e6 cleanup: use exiting function
Reuse existing code and some indent change.
2016-12-14 11:41:42 +01:00
Zdenek Kabelac
fecd043cca raid: split preserves local exlusive activation 2016-12-14 11:40:01 +01:00
Zdenek Kabelac
77e09c3fb4 raid: activation with list
Commit 0690392040 revealed a problem
in raid metadata manipulation.

We do two operations in one table reload:
- raid leg/image extraction
- rename remaining raid legs

This should be made in separate steps. Otherwise we do an
uncorrectable table change on error path (leaving tables
for admin and dmsetup).

As a hotfix - restore the previous logic and use a single
new function _lv_update_and_reload_list which activates exclusively
extracted LVs on the list before resuming suspended raid LV.
This restore 'rename' functionality upon resume.

Also still preserve the 'origin_only' logic - although we know
it's not working properly for cluster and LV stacking.

Further fixes are needed.
2016-12-14 11:37:02 +01:00
Zdenek Kabelac
4a05f83278 configure: just move new macro to right file
aclocal is regenerated while acinclude is permanent.
Move new macro to permanent file.
2016-12-13 22:49:59 +01:00
Bryn M. Reeves
f4401fe351 libdm: ensure first extent is always counted
If FIEMAP returns a single extent after the first call, no extent
boundary is detected and the first extent is not counted by the
normal mechanism.

In this case, increment nr_extents at the same time the extent is
added to the region table, before returning.
2016-12-13 21:41:31 +00:00
Zdenek Kabelac
fce7449d73 cleanup: remove wrapping function
backup is not 'tested' for success and also it should
actually happen just when command is finished.
We do not target to make backups with each inter-step
metadata change.
2016-12-13 22:07:52 +01:00
Zdenek Kabelac
c7da16e5f1 cleanup: log message updates 2016-12-13 22:07:52 +01:00
Zdenek Kabelac
a8f5e1f274 cleanup: more lv_is_ usage 2016-12-13 22:07:52 +01:00
Zdenek Kabelac
47b96c3537 cleanup: allocate NAME_LEN size for lv name 2016-12-13 22:07:52 +01:00
Zdenek Kabelac
d0fe3ec0c5 raid: avoid manipulation of segment status
RAID is LV property

TODO: only 2 flags are seg->status: PVMOVE & MERGING
At least the second one should be soon elimanted as again
we merge LV not a segment.
2016-12-13 22:07:52 +01:00
Zdenek Kabelac
d1e398c474 segtype: check for seg type instead of status
RAID is LV property - which has single segment of raid type.
2016-12-13 22:07:52 +01:00
Zdenek Kabelac
0690392040 raid: improve table reload sequence
This is another place for 'common' use pattern or
reload and activation of deleted devices.
(Moving the exclusive activation to _deactivate_and_remove_lvs()).

TODO: looks like halve of raid function is reloading
just 'origin' - and the other full LV.
2016-12-13 22:07:52 +01:00
Bryn M. Reeves
7dff632c11 libdm: add min_num_bits to dm_bitset_parse_list()
It's useful to be able to specify a minimum number of bits for a
new bitmap parsed from a list, for e.g. to allow for expansing a
group without needing to copy/reallocate the bitmap.

Add a backwards compatible symbol for programs linked against old
versions of the library.
2016-12-13 21:02:18 +00:00
Bryn M. Reeves
e8d966bc31 libdm: use dm_bit_get_last() in _stats_group_tag_fill()
Instead of iterating over all bits, use dm_bit_get_last() to find
the last set bit in the group bitmap.
2016-12-13 21:02:18 +00:00
Bryn M. Reeves
5d1d65e735 libdm: add dm_bit_get_last()/dm_bit_get_prev()
It is sometimes convenient to iterate over the set bits in a dm
bitset in reverse order (from the highest set bit toward zero), or
to quickly find the last set bit.

Add dm_bit_get_last() and dm_bit_get_prev(), mirroring the existing
dm_bit_get_first() and dm_bit_get_next().

dm_bit_get_prev() uses __builtin_clz when available to efficiently
test the bitset in reverse.
2016-12-13 21:01:58 +00:00
Bryn M. Reeves
107bc13db3 util: add clz() and use __builtin_clz() if available
Add a macro for the clz (count leading zeros) operation.

Use the GCC __builtin_clz() for clz() if it is available and fall
back to a shift based implementation on systems that do not set
HAVE___BUILTIN_CLZ.
2016-12-13 20:41:29 +00:00
Bryn M. Reeves
83a9cd5258 configure: check for __builtin_clz() 2016-12-13 20:38:40 +00:00
Bryn M. Reeves
930b0b4c9e libdm: fix start of file detection in _stats_map_extents() 2016-12-13 20:25:47 +00:00
Bryn M. Reeves
eb65572217 libdm: break up _stats_get_extents_for_file()
Split out the loop that iterates over each batch of FIEMAP
extent data from the function that sets up and calls the ioctl
to reduce nesting and simplify local variable use:

  _stats_get_extents_for_file()
  ->  _stats_map_extents()

The _stats_map_extents() function is responsible for detecting
eof and extent boundaries and adding whole, allocated extents
to the file extent table for region creation.
2016-12-13 20:25:45 +00:00
Bryn M. Reeves
ea9af3e290 libdm: fix dm_stats_foreach_group() macro 2016-12-13 20:01:00 +00:00
Bryn M. Reeves
8e33972828 libdm: check for non-existent region_id values in groups
Check that all region_id values specified in a group bitmap are
actually present: although this should not normally happen when
using the dmstats tool, it is possible as a result of manual
changes (or bugs) for a group descriptor to contain one or more
group_id values that do not exist.

Check for this situation when reading group descriptors, warn
the user the user, and clear these bits in the bitmap when
formatting it for output.
2016-12-13 15:37:48 +00:00
Bryn M. Reeves
99b6d82e2d libdm: fix segfault with invalid group descriptor
If a region has a a DMS_GROUP tag in aux_data where the first
region_id in the bitmap is not the same as the containing region,
dmstats will segfault:

  # '2' is never a valid group bitset list for region_id == 0
  # dmsetup message vg_hex/root 0 "@stats_set_aux 0 DMS_GROUP=img:2#"

  # dmsetup message vg_hex/root 0 "@stats_list"
  0: 45383680+16384 16384 dmstats DMS_GROUP=img:2#
  1: 46071808+32768 32768 dmstats -
  2: 47382528+16384 16384 dmstats -

  # dmstats list
  Segmentation fault (core dumped)

The crash will occur in some arbitrary dm_stats_get_* property
method - this happens while processing the 1st region_id in the
bitset, because the region is marked as grouped, but there is
no group bitmap present at dms->groups[2]->regions.

Fix this by detecting a mismatch between the expected region_id
and dm_bit_get_first() for the parsed bitset during
_parse_aux_data_group().
2016-12-13 14:37:41 +00:00
Bryn M. Reeves
138e4336fd libdm: fix region overlap tests 2016-12-13 09:09:29 +00:00
Bryn M. Reeves
93f420caf4 libdm: fix _stats_get_extents_for_file()
Handle files that contain multiple logical extents in a single
physical extent properly:

  - In FIEMAP terms a logical extent is a contiguous range of
    sectors in the file's address space.

  - One or more physically adjacent logical extents comprise a
    physical extent: these are the disk areas that will be mapped
    to regions.

  - An extent boundary occurs when the start sector of extent
    n+1 is not equal to (n.start + n.length).

This requires that we accumulate the length values of extents
returned by FIEMAP until a discontinuity is found (since each
struct fiemap_extent returned by FIEMAP only represents a single
logical extent, which may be contiguous with other logical
extents on-disk).

This avoids creating large numbers of regions for physically
adjacent (logical) extents and fixes the earlier behaviour which
would only map the first logical extent of the physical extent,
leaving gaps in the region table for these files.
2016-12-13 09:09:25 +00:00
Heinz Mauelshagen
87117c2b25 lvchange: allow a transiently failed RaidLV to be refreshed
Enhance commit 0b8bf73a63 to refresh the top-level LV correctly
in case of a clustered, remotely activated RaidLV.

Related: rhbz1399844
2016-12-12 22:08:47 +01:00
Zdenek Kabelac
75ec7c8dee tests: update seg_size_pe
Default prepare_vg uses 512K - so update test accordingly
2016-12-12 11:51:50 +01:00
Zdenek Kabelac
3dd6e2c7e1 tests: use prepare_vg more often 2016-12-12 11:22:41 +01:00
Zdenek Kabelac
8c9c6ab660 tests: no left devices check for skipped test 2016-12-12 11:22:10 +01:00
Zdenek Kabelac
48d33e5fb6 cov: use unsigned for single bit values
Avoid using signed int.
2016-12-12 11:21:42 +01:00
Zdenek Kabelac
56e4e2ce2b tests: track leaked devices in tests
When test calls teardown, no devices created by test are expected
to be left in table. Trap such orphans and make the test fail.
2016-12-11 23:24:19 +01:00
Zdenek Kabelac
273ccb1170 tests: remove unwanted exit
Exit seemes slipped in from local testing in:
eb6b2a11e3
2016-12-11 23:24:19 +01:00
Zdenek Kabelac
b902fd08f6 tests: remove some leaking device
These tests leaks devices (known bugs).
Remove them via dmsetup.

TODO: fix actual commands
2016-12-11 23:24:19 +01:00
Zdenek Kabelac
bcf59a1b18 tests: test should clean devices it has created
To be able to detect lvm2 command is not leaking some
'unexpected' device - remove all devices before
test exits by its own command so test teardown
now can check what was 'left' unexpectedly.
2016-12-11 23:24:19 +01:00
Zdenek Kabelac
198f335139 tests: slower device
Some of test machines are too fast, slow raid syncing even more.
2016-12-11 23:24:19 +01:00
Zdenek Kabelac
4a33e4c509 cov: declaration matching 2016-12-11 23:24:19 +01:00
Zdenek Kabelac
b8c729efd0 cov: add internal error for impossible code path 2016-12-11 23:24:19 +01:00
Zdenek Kabelac
794093722c debug: missing stack traces 2016-12-11 23:24:19 +01:00
Zdenek Kabelac
dc7d3dd5ed cleanup: use NAME_LEN stack buffer
Using NAME_LEN we get at least easy max LV name size validation.
Also code gets more simple.
2016-12-11 23:24:19 +01:00
Zdenek Kabelac
6cd68c55dd cleanup: reuse existing function
Call lv_update_and_reload implementation.
2016-12-11 23:24:19 +01:00