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Commit Graph

2946 Commits

Author SHA1 Message Date
David Teigland
5fef89361d integrity: display total mismatches at raid LV level
Each integrity image in a raid LV reports its own number
of integrity mismatches, e.g.

lvs -o integritymismatches vg/lv_rimage_0
lvs -o integritymismatches vg/lv_rimage_1

In addition to this, allow the total number of integrity
mismatches from all images to be displayed for the raid LV.

lvs -o integritymismatches vg/lv

shows the number of mismatches from both lv_rimage_0 and
lv_rimage_1.
2020-11-11 15:10:15 -06:00
Zdenek Kabelac
7bafae48bb gcc: cleanup warns from older gcc 2020-10-26 13:06:53 +01:00
Zdenek Kabelac
9740e98cbd lv_manip: add space into message
Just add space between %s(.
2020-10-24 01:42:16 +02:00
David Teigland
6226512ad2 get dev size when setting pv device
In some cases the dev size may not have been read yet
in set_pv_devices().  In this case get the dev size
before comparing the dev size with the pv size.
2020-10-22 13:19:17 -05:00
Zdenek Kabelac
b75c2dfe1b debug: shorten error message
Just check for sigint during log_error().
2020-10-19 16:53:18 +02:00
Zdenek Kabelac
e7fff97b8d wipe_lv: use BLKZEROOUT when possible
Since BLKZEROOUT ioctl should be supposedly fastest
way how to clear block device start using this ioctl
for zeroing a device. Commonly we do zero typically
small portion of a device (8KiB) - however since we now
also started to zero metadata devices, in the case
of i.e. thin-pool metadata this can go upto ~16GiB
and here the performance starts to be noticable.
2020-10-02 21:04:16 +02:00
Zdenek Kabelac
c65d3a6b8a wipe_lv: interruptible wiping
Since we now block signals and wiping may take unexpectedly long
time - support breaking command while wipe is in progress.
2020-10-02 21:03:19 +02:00
Zdenek Kabelac
7396f1cfee wipe_lv: drop label_scan_invalidate on error path
Since dev_set_bytes() now closes  dev on error path itself,
remove this unneeded call now (introduced few commits back
in history thus removing comment from WHATS_NEW)
2020-10-02 21:02:04 +02:00
David Teigland
c32d7fed4f writecache: use two step detach
When detaching a writecache, use the cleaner setting
by default to writeback data prior to suspending the
lv to detach the writecache.  This avoids potentially
blocking for a long period with the device suspended.

Detaching a writecache first sets the cleaner option, waits
for a short period of time (less than a second), and checks
if the writecache has quickly become clean.  If so, the
writecache is detached immediately.  This optimizes the case
where little writeback is needed.

If the writecache does not quickly become clean, then the
detach command leaves the writecache attached with the
cleaner option set.  This leaves the LV in the same state
as if the user had set the cleaner option directly with
lvchange --cachesettings cleaner=1 LV.

After leaving the LV with the cleaner option set, the
detach command will wait and watch the writeback progress,
and will finally detach the writecache when the writeback
is finished.  The detach command does not need to wait
during the writeback phase, and can be canceled, in which
case the LV will remain with the writecache attached and
the cleaner option set.  When the user runs the detach
command again it will complete the detach.

To detach a writecache directly, without using the cleaner
step (which has been the approach previously), add the
option --cachesettings cleaner=0 to the detach command.
2020-10-01 11:33:02 -05:00
David Teigland
2272a32e6f lvmlockd vdo: add support
lvmlockd handling for vdo lv and vdo pool is like
thin lv and thin pool.
2020-09-29 14:43:27 -05:00
Zdenek Kabelac
bd0d4de4e2 active: fix compilation without devmapper
Better support for compilation without device-mapper.
2020-09-29 10:43:56 +02:00
Zdenek Kabelac
4de6f58085 thin: use lv_status_thin and lv_status_thin_pool
Introduce structures lv_status_thin_pool and
lv_status_thin  (pair to lv_status_cache, lv_status_vdo)

Convert lv_thin_percent() -> lv_thin_status()
and  lv_thin_pool_percent() + lv_thin_pool_transaction_id() ->
lv_thin_pool_status().

This way a function user can see not only percentages, but also
other important status info about thin-pool.

TODO:
This patch tries to not change too many other things,
but pool_below_threshold() now uses new thin-pool info to return
failure if thin-pool cannot be actually modified.
This should be handle separately in a better way.
2020-09-29 10:43:56 +02:00
Zdenek Kabelac
92c0e8c17f writecache: archive before modification of metadata
Archive before we start to modify metadata.
2020-09-29 10:43:56 +02:00
Zdenek Kabelac
08e838f488 cleanup: avoid unneeded check
Since creation of thin snapshot already makes sure,
the message list is empty, there is no need to check
this again.
2020-09-29 10:43:56 +02:00
Heinz Mauelshagen
8952dcbff0 Revert "lvconvert: display warning if raid1 LV image count does not change"
This reverts superfluous commit 3c9177fdc0 as
_lv_raid_change_image_count() already checks for non-changed image count.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1872130
2020-09-28 17:14:03 +02:00
Zdenek Kabelac
e414ebef6e thin: pass through whole code
Instead of early 'return 0' let the whole code finish
in case of an error with syncing.
2020-09-25 22:59:35 +02:00
Zdenek Kabelac
ef59c83f2d thin: enhance lvcreate error paths
Improve error response and reporting, when creating thin snapshots.
If the thin pool kernel metadata already have device with ID lvm2
tries to create, give more meanigful error message and also properly
restore transaction id to the value known to thin-pool in this case.

Before it's been possible to divert by one from kernel TID value,
and lvm2 stacked delete message for such thin device.
2020-09-25 22:56:40 +02:00
Zdenek Kabelac
e2eb1dc501 thin: no delete message for device_id 0
Since we always use device_id > 0, we could use
device_id == 0 to actually mark thinLV as an
LV we want to remove without delete message.
2020-09-25 22:54:07 +02:00
Zdenek Kabelac
7c19186271 vdo: disable support for online rename of vdopool LV
Since ATM kernel does not support this operation,
disable 'lvrename' of an active vdopool.

As a workaround, user may simply deactivate, rename and activate.
2020-09-23 13:18:23 +02:00
Zdenek Kabelac
3a3307c0d8 vdo: enhance vdo pool extension
When user tries to extend vdo pool - he needs to go always
at least by 1 full VDO slab  (defined as  vdo_slab_size_mb).

To avoid all trouble around find 'workable' size - lvm2 automatically
increases the passed (or by --use-policies calculated) extension size
(and informs a user about sometimes possibly large increase as slab
size can go upto 32GiB)

With VDO users need to always 'think-big' anyway and expect such
operation to be in GiB domain range.
2020-09-22 23:28:43 +02:00
Zdenek Kabelac
f38b7afd62 vdo: extend vdo segment validation
Try to catch all suspicious VDO segments in metadata early.
2020-09-22 23:25:16 +02:00
Zdenek Kabelac
642ef54399 vdo: correct message about policy extend support
Policy extend is already supported for vdo pools as well,
so correct the error message.
2020-09-22 23:25:16 +02:00
Zdenek Kabelac
5bc66532c7 activation: use revert_lv on tree suspend failure
When thetable reload fails during suspend() - we were only calling
plain resume() - and this will reload only those devices,
which were left suspend, but will not try to restore
metadata state according to lvm2 reverted metadata.
So if we were reloading device tree - we have restored
only top-level LV and rest of reverted device manipulation
were left alone and possibly mismatched what is in committed
metadata.

FIXME: There are several cases were such revert will likely not work
properly anyway as some operation are currenly handled in single commit,
while they need multiple commits, but it's step towards better correctness.
At least we catch there errors now earlier.
2020-09-22 21:02:14 +02:00
David Teigland
1404e5ee61 metadata: open rw fd before closing ro fd
lvm opens devices readonly to scan them, but
needs to open then readwrite to update the metadata.
Previously, the ro fd was closed before the rw fd
was opened, leaving a small gap where the dev was
not held open, and during which the dev could
possibly change which storage it referred to.

With the bcache_change_fd() interface, lvm opens a
rw fd on a device to be written, tells bcache to
change to the new rw fd, and closes the ro fd.

. open dev ro
. read dev with the ro fd (label_scan)
. lock vg (ex for writing)
. open dev rw
. close ro fd
. rescan dev to check if the metadata changed
  between the scan and the lock
. if the metadata did change, reread in full
. write the metadata
2020-09-18 15:10:11 -05:00
David Teigland
1570e76233 bcache: use indirection table for fd
Add a "device index" (di) for each device, and use this
in the bcache api to the rest of lvm.  This replaces the
file descriptor (fd) in the api.  The rest of lvm uses
new functions bcache_set_fd(), bcache_clear_fd(), and
bcache_change_fd() to control which fd bcache uses for
io to a particular device.

. lvm opens a dev and gets and fd.
  fd = open(dev);

. lvm passes fd to the bcache layer and gets a di
  to use in the bcache api for the dev.
  di = bcache_set_fd(fd);

. lvm uses bcache functions, passing di for the dev.
  bcache_write_bytes(di, ...), etc.

. bcache translates di to fd to do io.

. lvm closes the device and clears the di/fd bcache state.
  close(fd);
  bcache_clear_fd(di);

In the bcache layer, a di-to-fd translation table
(int *_fd_table) is added.  When bcache needs to
perform io on a di, it uses _fd_table[di].

In the following commit, lvm will make use of the new
bcache_change_fd() function to change the fd that
bcache uses for the dev, without dropping cached blocks.
2020-09-18 15:10:11 -05:00
Zdenek Kabelac
2b36542f41 wipe: dev_set_bytes resolves zeroing
Since dev_write_zeros() is just subset of dev_set_bytes()
use it directly and simplify code.
2020-09-15 23:07:06 +02:00
Zdenek Kabelac
d588de77aa wipe: convert zero_value to uint8_t
We always write this value as byte.
2020-09-15 22:52:25 +02:00
Zdenek Kabelac
ec4e8b5c0e wipe: zeroing of 8 sectors is granted
With do_zero min is always 8 sectors, so use 0 as default.
2020-09-15 22:52:25 +02:00
Zdenek Kabelac
187cc8d344 lvcreate: change error message
Provide more useful error message.
2020-09-15 22:52:25 +02:00
Zdenek Kabelac
39198eb2ce lvcreate: add extra synchronization at error path
Put explict udev synchronization before we try to deactive devices.
2020-09-15 22:52:25 +02:00
Zdenek Kabelac
b2978efbff cache: simplier signal handling
Use just single sigint_allow()/restore() within flushing loop
and void one extra signal manipulation.
2020-09-14 00:15:14 +02:00
Zdenek Kabelac
77fdc17d70 alloc: improve estimation of sufficient_pes_free
Metadata size was calculated correctly only for raids.

Fixes problem for crash during lvcreate when thin-pool was created
on a VG where remaining free space had the size to only fit a single
metadata LV and not also its _pmspare.

Lvcreate crashed with this assert message:

lvcreate: metadata/pv_map.c:198: consume_pv_area: Assertion `to_go <= pva->count' failed.
Aborted (core dumped)

TODO: there is probably to large overload of several alloc_handle
variables.

Reported-by: Wu Guanghao<wuguanghao3@huawei.com>
Reported-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
2020-09-11 21:51:24 +02:00
Zdenek Kabelac
9f78acfee9 thin: compensate metadata size by extra percent
When using --use-policy for automatic extension of thin-pool,
the extension of thin-pool's metadata itself can actually take
some extra space.
Since I'm not aware of exact compensation formula, add just
1% extra to calculated amount and hope it fits.

Wanted target is to always have usable thin-pool that fits
bellow pool_metadata_min_threshold().
2020-09-11 21:42:37 +02:00
Zdenek Kabelac
b798554a20 lv_manip: even better rounding 2020-09-11 13:37:04 +02:00
Zdenek Kabelac
678951f635 cleanup: comment typo 2020-09-10 23:55:03 +02:00
Zdenek Kabelac
e7bd3ba22d debug: drop debug trace from regular path
Since we query on regular code these:
  lv_raid_has_integrity()
  lv_has_integrity_recalculate_metadata()
without prior checking for lv_is_raid() - these 'return 0' should
not use <stacktrace> as they are expected.
2020-09-10 23:55:03 +02:00
Zdenek Kabelac
bc09803628 lv_manip: relocate check to proper function 2020-09-10 23:54:33 +02:00
Zdenek Kabelac
e7f5acdfa6 lvextend: improve percentage estimation
Correcting rounding rules for percentage evaluation.

Validate supported range of percentage.
(although ranges are already validated earlier on code path)
2020-09-10 23:54:31 +02:00
Zdenek Kabelac
3e6bb77228 lv_manip: add synchronization points 2020-09-08 21:23:03 +02:00
David Teigland
d1019a6434 integrity: improve lv type checks 2020-09-02 12:40:45 -05:00
David Teigland
9a7b81fb72 integrity: fix segfault for lv with no seg
in lv_raid_has_integrity
2020-09-02 09:15:58 -05:00
David Teigland
ed249a2c53 integrity: report mismatches
with lvs -o integritymismatches

reported for integrity images, which may report
different values
2020-09-01 17:13:21 -05:00
David Teigland
f2c1de783c integrity: always default to journal mode
lvconvert was defaulting to bitmap mode,
and lvcreate was defaulting to journal mode.
2020-09-01 17:12:28 -05:00
Zdenek Kabelac
672d5ad98b gcc: hide warn about possible uninitialized use of dev_ret
Older gcc reports this fp problem.
2020-09-01 23:40:24 +02:00
Zdenek Kabelac
56c41b7522 cov: avoid duplicated assign 2020-09-01 17:57:50 +02:00
Zdenek Kabelac
fd96f1014b gcc: zero-sized array to fexlible array C99
Switch remaining zero sized struct to flexible arrays to be C99
complient.

These simple rules should apply:

- The incomplete array type must be the last element within the structure.
- There cannot be an array of structures that contain a flexible array member.
- Structures that contain a flexible array member cannot be used as a member of another structure.
- The structure must contain at least one named member in addition to the flexible array member.

Although some of the code pieces should be still improved.
2020-09-01 17:57:50 +02:00
Zdenek Kabelac
b722ce2f10 gcc: drop bogus ; 2020-08-28 21:43:03 +02:00
Zdenek Kabelac
ee0cb17608 gcc: use apropriate type for reading and printing values 2020-08-28 21:43:03 +02:00
Zdenek Kabelac
ff4827ffb1 lv_manip: get_default_region_size return uint32_t 2020-08-28 21:43:02 +02:00
Zdenek Kabelac
03f9cd95b4 writecache: correct usage of const struct 2020-08-28 21:43:02 +02:00