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Run backup of metadata on remote nodes in the
same place like local node - when calling backup().
Introduce backup_locally() which calls only
local backup if needed.
Remote backup is now trigerred by LCK_VG_BACKUP flag
combination (special VG lock).
This lock type will call check_current_backup()
(including backup_locally() call) and updates
metadata on all nodes.
(Patch fixes non-functional remote backup,
current call during VG lock never triggers.)
The backup() call store metadata from memory.
But in cluster backup() call performs
remote nodes metadata backup and it reads data from disk.
For metadata backup consistency,
patch moves all backup() calls after vg_commit.
(Moreover, some tools already do that this way.)
# pvs -a -o devices
Volume group name (null) has invalid characters
Skipping volume group (null)
...
_pvsegs_sub_single creates fake vg, we need to check
that pv is real here.
Since now, all code reading volume group is responsible for releasing
the memory allocated by calling vg_release(vg).
(For simplicity of use, vg_releae can be called for vg == NULL,
the same logic like free(NULL)).
Also providing simple macro for unlocking & releasing in one step,
tools usualy uses this approach.
The global memory pool (cmd->mem) should be used only for global
physical volume operations.
This patch have to be applied with all subsequent patches to complete
memory pool per vg logic.
Using separate memory pool has quite bit memory saving impact when
using large VGs, this is mainly needed when we have to use
preallocated and locked memory (and should not overflow from that
memory space).
The all_pvs list, used in vg_read, should make its own private
copy of pv structures, otherwise (when vg will use its own pool)
it will point to released memory pool.
The same applies for get_pvs() call.
Patch adds pv_list copy helper and adds explicit memory pool
parameter into _copy_pv.
(Please note that all these helper functions cannot guarantee that
vg related fields are valid - proper vg read & lock must be used
if it is requested.)
Patch fixes these problems:
- during the snapshot creation process, it needs create 2 LVs,
one is cow, second becomes snapshot.
If the code fails in vg_add_snapshot, code lvcreate will not remove
LV cow volume.
- if max_lv is set and VG contains snapshot, it can happen that
during the activation lv_count is temporarily increased over the limit
and VG metadata are not properly processed
see https://bugzilla.redhat.com/show_bug.cgi?id=490298
- vgcfgrestore alows restore with max_lv set to lower valuer that actual
LV count. This later leads to situation that max_lv is completely ignored.
- vgck doesn't call vg_validate(). It should at least try:-)
Signed-off-by: Milan Broz <mbroz@redhat.com>
The original liblvm.a has been moved to liblvm-internal.a.
We now use liblvm.a for the new application library and build
it inside liblvm directory.
Change dependencies so tools depend on liblvm application library,
and application library depends on liblvm internal.
if rlocn not defined (there is no metadata area).
In most cases it fails in validate_name(),
unfortunately there are situatuions, when
validate_name is ok and later code fails with
checksum error.
Reproducer:
# dd if=/dev/zero of=/dev/loop0
# pvcreate --metadatasize 637k /dev/loop0
Physical volume "/dev/loop0" successfully created
# pvs /dev/loop0
/dev/loop0: Checksum error
PV VG Fmt Attr PSize PFree
/dev/loop0 lvm2 -- 1.00M 1.00M
Signed-off-by: Milan Broz <mbroz@redhat.com>
-
Using argv[] list in exec_cmd() to allow more params for external commands.
Fsadm does not allow checking mounted filesystem.
Fsadm no longer accepts 'any other key' as 'no' answer to y/n.
Fsadm improved handling of command line options.
New structure lvm (used as an alias to cmd_context), new type definition lvm_t
for the lvm handle. Added functions lvm_create, lvm_destroy and
lvm_reload_config using the new handle.
Modified test/api/test.c:
Use new lvm.h header file and lvm_t handle.
Removed lib/lvm2.h
Author: Thomas Woerner <twoerner@redhat.com>
This patch is not fully tested and leaves some related bugs unfixed.
Intended behaviour of the code now:
pe_start in the lvm2 format PV label header is set only by pvcreate (or
vgconvert -M2) and then preserved in *all* operations thereafter.
In some specialist cases, after the PV is added to a VG, the pe_start
field in the VG metadata may hold a different value and if so, it
overrides the other one for as long as the PV is in such a VG.
Currently, the field storing the size of the data area in the PV label
header always holds 0. As it only has meaning in the context of a
volume group, it is calculated whenever the PV is added to a VG (and can
be derived from extent_size and pe_count in the VG metadata).
When reporting explicitly label attributes (pv_uuid for example), we do not
need to read metadata.
This patch separate the label fileds and removes scan_vgs_for_pvs
in process_each_pv() if not needed.
(There should be no user visible change in output.)
We display '0' for these fields now in this case. Ideally these values are
undefined for an orphan PV but today there is no way to specify undefined
with display functions such as _size64_disp().
Reports the size of the smallest metadata area in a PV or a VG.
Useful to confirm pvcreate --metadatasize or pvmetadatasize setting in
/etc/lvm/lvm.conf file.
NOTE: Actual value in these fields will most always differ from that
given in pvcreate options due to rounding and alignment effects.
pvcreate $DEV
vgcreate -s 1k vg_test $DEV
lvcreate -l 1 -n lv1 vg_test
..
/dev/vg_test/lv1: write failed after 1024 of 4096 at 0: No space left on device
Just check for maximum write size in set_lv.
It fails for 1k PE now.
Patch adds log_region_size into allocation habdle struct
and use it in _alloc_parallel_area() for proper log size calculation
instead of hardcoded 1 extent - which can fail.
Reproducer for incorrect log size calculation:
DEV=/dev/sd[bcd]
pvcreate $DEV
vgcreate -s 1k vg_test $DEV
lvcreate -m1 -L 12M -n mirr vg_test
https://bugzilla.redhat.com/show_bug.cgi?id=477040
The log size calculation is mostly copied from kernel code.
Check for major/minor collision is added in _add_dev_to_dtree()
where we already read info by uuid,
so in the case of requesting major/minor it queries device-mapper
by major/minor for device availability.
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=204992
Very simple / crude method of removing 'is_static' from initialization.
Why should we require an application tell us whether it is linked
statically or dynamically to libLVM? If the application is linked
statically, but libraries exist and dlopen() calls succeed, why
do we care if it's statically linked?
This allows us to remove one argument from create_toolcontext() and
moves it closer to a generic library init function.
In the arg_*() functions, we just use _the_args() directly.
For now we leave the first parameter to these
arg_*() functions (struct cmd_context *) because
of the number of files involved in removing the
parameter.
Problem is dm_report_init() may return NULL and subsequent call to
dm_report_set_output_field_name_prefix() doesn't handle NULL value.
Example:
pvs --nameprefixes --rows --unquoted --noheadings -opv_name,fred
Logical Volume Fields
---------------------
lv_uuid - Unique identifier
lv_name - Name. LVs created for internal use are enclosed in brackets.
...
Physical Volume Segment Fields
------------------------------
pvseg_start - Physical Extent number of start of segment.
pvseg_size - Number of extents in segment.
Unrecognised field: fred
Segmentation fault
Move init_full_scan_done(0) and init_mirror_in_sync(0) from init_lvm()
after call to create_toolcontext() to _init_globals(), called from bottom
of create_toolcontext(). No functional change.
Author: Dave Wysochanski <dwysocha@redhat.com>
Acked-by: James Cameron <james.cameron@hp.com>
Acked-by: Alasdair G Kergon <agk@redhat.com>
init_formats() sets up the command formats, and currently sets cmd->fmt_backup
but does not set cmd->fmt to a default value. This seems incorrect so we
set it to cmd->default_settings.fmt before returning.
The call we remove here may set cmd->fmt based on a command line setting.
But it is safe to remove this, because the only caller of init_lvm() that
cares about the cmdline override is the cmdline tools (clvmd does not care),
called from lvm2_main(). After lvm2_main() calls init_lvm(), it later calls
lvm_run_command(). In lvm_run_command(), we have a call to _apply_settings(),
which has the identical assignment of cmd->fmt that this patch removes.
Identical argument to previous patch which removed archive_enable() calls.
We add a new parameter to backup_init() which sets the enable value based
on the cmd->default_settings.backup value. This value was used to set
cmd->current_settings.backup, used in the removed backup_enable() call.
_init_backup() calls archive_init(), which originally set 'enabled' to
a hardcoded '1' value. This seems incorrect based on my read of other
areas of the code so here we add a 'enabled' paramter to archive_init().
We pass in cmd->default_settings.archive, which is obtained from the
config tree. Later in create_toolcontext, cmd->current_settings is
set to cmd->default_settings. The archive_enable() call we remove
here was using cmd->current_settings to set the 'archive' enable
value. The final value of cmd->archive_params->enabled should thus
be equivalent to the original code.
This one we actually need to move. _init_logging() is called from
create_toolcontext(), which makes this call:
/* Test mode */
cmd->default_settings.test =
find_config_tree_int(cmd, "global/test", 0);
But it does not call init_test(). So we need an init_test() somewhere.
The most logical place is to put it inside _init_logging(), since this
is where the config value is read and default_settings are set. Placing
the init_test() call here matches what is done with other variables and
seems to make sense.
(Avoids having same mirror table loaded twice concurrently by first
using a 'zero' table to set the size of the device so when mirror
table is preloaded it doesn't have to be activated immediately.)
