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This fixes a regression from commit a7c45ddc5, which moved
the lvmetad VG update from vg_commit() to unlock_vg().
The lvmetad VG update needs to send the version of metadata
that was committed rather than sending the state of struct 'vg'.
The 'vg' may have been partially modified since vg_commit(),
and contain non-committed metadata that shouldn't be sent
to lvmetad.
Any failing stripes in raid0/raid0_meta type LVs cause data loss,
thus replacement via 'lvconvert --replace...' does not make sense.
Patch prohibits replacement on raid0/raid0_meta LVs.
- resolves rhbz1356734
Commit ca878a3426 changed behavior
or resize operation. Later the code has been futher changed
to skip fs resize completely when size of LV is already matching
and finaly at the most recent resize changeset for resize the
check for matching size has been eliminated as well so we ended
with a request call to resize fs to 0 size in some cases.
This commit reoders some test so the prompt happens just once before
resize of possibly 2 related volumes.
Also extra test for having LV already given size is added, and
whole metadata update is skipped for this case as the only
result would be an increment of seqno.
However the filesystem is still resized when requested,
so if the LV has some size and the resize is resolved to
the same size, the filesystem resize is called so in case FS
would not match, the resize will happen.
A livelock occurs on extension in lv_manip when adjusting the region size,
which doesn't apply to any raid0/raid0_meta LVs (these don't have a bitmap).
Fix by prohibiting the region size adjustment on any such LVs.
- resolves rhbz1354604
An unconditional access to the non-existing MetaLV of a raid0 LV in
lv_raid_remove_missing() was causing the segfault.
Only call log_debug() on replacements of existing MetaLVs.
- resolves rhbz1354646
When logging to epoch files we would like to prevent creating too large
log files otherwise a spining command could fulfill available space
very easily and quickly.
Limit for to 100000 per command.
This patch fixes link validation for used thin-pool.
Udev rules correctly creates symlinks only for unused new thin-pool.
Such thin-pool can be used by foreing apps (like Docker) thus
has /dev/vg/lv link.
However when thin-pool becomes used by thinLV - this link is no
longer exposed to user - but internal verfication missed this
and caused messages like this to be printed upon 'vgchange -ay':
The link /dev/vg/pool should have been created by udev but it was not
found. Falling back to direct link creation.
And same with 'vgchange -an':
The link /dev/vg/pool should have been removed by udev but it is still
present. Falling back to direct link removal.
This patch ensures only unused thin-pool has this link.
Apply the same idea as vg_update.
Before doing the VG remove on disk, invalidate
the VG in lvmetad. After the VG is removed,
remove the VG in lvmetad. If the command fails
after removing the VG on disk, but before removing
the VG metadata from lvmetad, then a subsequent
command will see the INVALID flag and not use the
stale metadata from lvmetad.
Previously, a command sent lvmetad new VG metadata in vg_commit().
In vg_commit(), devices are suspended, so any memory allocation
done by the command while sending to lvmetad, or by lvmetad while
updating its cache could deadlock if memory reclaim was triggered.
Now lvmetad is updated in unlock_vg(), after devices are resumed.
The new method for updating VG metadata in lvmetad is in two phases:
1. In vg_write(), before devices are suspended, the command sends
lvmetad a short message ("set_vg_info") telling it what the new
VG seqno will be. lvmetad sees that the seqno is newer than
the seqno of its cached VG, so it sets the INVALID flag for the
cached VG. If sending the message to lvmetad fails, the command
fails before the metadata is committed and the change is not made.
If sending the message succeeds, vg_commit() is called.
2. In unlock_vg(), after devices are resumed, the command sends
lvmetad the standard vg_update message with the new metadata.
lvmetad sees that the seqno in the new metadata matches the
seqno it saved from set_vg_info, and knows it has the latest
copy, so it clears the INVALID flag for the cached VG.
If a command fails between 1 and 2 (after committing the VG on disk,
but before sending lvmetad the new metadata), the cached VG retains
the INVALID flag in lvmetad. A subsequent command will read the
cached VG from lvmetad, see the INVALID flag, ignore the cached
copy, read the VG from disk instead, update the lvmetad copy
with the latest copy from disk, (this clears the INVALID flag
in lvmetad), and use the correct VG metadata for the command.
(This INVALID mechanism already existed for use by lvmlockd.)
Simplify code around _do_get_report_selection - remove "expected_idxs[]"
argument which is superfluous and add "allow_single" switch instead to
allow for recognition of "--configreport <report_name> -S" as well as
single "-S" if needed.
Null pointer dereferences (FORWARD_NULL) /safe/guest2/covscan/LVM2.2.02.158/tools/reporter.c: 961 in _do_report_get_selection()
Null pointer dereferences (FORWARD_NULL) Dereferencing null pointer "single_args".
Uninitialized variables (UNINIT) /safe/guest2/covscan/LVM2.2.02.158/tools/toollib.c: 3520 in _process_pvs_in_vgs()
Uninitialized variables (UNINIT) Using uninitialized value "do_report_ret_code".
Null pointer dereferences (REVERSE_INULL) /safe/guest2/covscan/LVM2.2.02.158/libdm/libdm-report.c: 4745 in dm_report_output()
Null pointer dereferences (REVERSE_INULL) Null-checking "rh" suggests that it may be null, but it has already been dereferenced on all paths leading to the check.
Incorrect expression (MISSING_COMMA) /safe/guest2/covscan/LVM2.2.02.158/lib/log/log.c: 280 in _get_log_level_name()
Incorrect expression (MISSING_COMMA) In the initialization of "log_level_names", a suspicious concatenated string ""noticeinfo"" is produced.
Null pointer dereferences (FORWARD_NULL) /safe/guest2/covscan/LVM2.2.02.158/tools/reporter.c: 816 in_get_report_options()
Null pointer dereferences (FORWARD_NULL) Comparing "mem" to null implies that "mem" might be null.
This reverts commit fa69ed0bc8.
This code sometimes expects to be presented with a read-only filesystem
(during some boot sequences for example) and copes appropriately with
this and it should not lead to expected error messages that might cause
unnecessary alarm.
lv_name arg is only used without known LV for resolving '*lv'.
Once we know *lv, never use lv_name ever again.
So setting it when passing *lv has not needed.
Add code to support more LVs to be resized through a same code path
using a single lvresize_params struct.
(Now it's used for thin-pool metadata resize,
next user will be snapshot virtual resize).
Update code to adjust percent amount resize for use_policies.
Properly activate inactive thin-pool in case of any pool resize
as the command should not 'deffer' this operation to next activation.
Use common API design and pass just LV pointer to lv_manip.c functions.
Read cmd struct via lv->vg->cmd when needed.
Also do not try to return EINVALID_CMD_LINE error when we
have already openned VG - this error code can only be returned before
locking VG.
We have only 2 users of _lv_active() - one was already checking for ==1
while the other use (_lv_is_active()) could have take '-1' as a sign of having
an LV active. So return 0 and log_debug also the reason while detection
has failed (i.e. in case --driverload n - it's kind of expectable,
but might have confused user seeing just <backtrace>).
This fixes commit f50d4011cd which
introduced a problem when using older lvm2 code with newer libdm.
In this case, the old LVM didn't recognize new _LOG_BYPASS_REPORT flag
that libdm-report code used. This ended up with no output at all
from libdm where log_print_bypass_report was called because the
_LOG_BYPASS_REPORT was not masked properly in lvm2's print_log fn
which was called as callback function for logging.
With this patch, the lvm2 registers separate print_log_libdm logging
function for libdm instead. The print_log_libdm is exactly the same
as print_log (used throughout lvm2 code) but it checks whether we're
printing common line on output where "common" means not going to stderr,
not a warning and not an error and if we are, it adds the
_LOG_BYPASS_REPORT flag so the log_print goes directly to output, not
to any log report.
So this achieves the same goal as in f50d4011cd,
just doing it in a way that newer libdm is still compatible with older
lvm2 code (libdm-report is the only code using log_print).
Looking at the opposite mixture - older libdm with newer lvm2 code,
that won't be compilable because the new log report functionality
that is in lvm2 also requires new dm_report_group_* libdm functions
so we don't need to care here.
Move code from original print_log fn to a separate _vprint_log function
that accepts va_list and make print_log a wrapper over _vprint_log.
The print_log just initializes the va_list and uses it for _vprint_log
call now. This way, we can reuse _vprint_log if needed.
Previously, vgcfgrestore would attempt to vg_remove the
existing VG from lvmetad and then vg_update to add the
restored VG. But, if there was a failure in the command
or with vg_update, the lvmetad cache would be left incorrect.
Now, disable lvmetad before the restore begins, and then
rescan to populate lvmetad from disk after restore has
written the new VG to disk.
log_print is used during cmd line processing to log the result of the
operation (e.g. "Volume group vg successfully changed" and similar).
We don't want output from log_print to be interleaved with current
reports from group where log is reported as well. Also, the information
printed by log_print belongs to the log report too, so it should be
rerouted to log report if it's set.
Since the code in libdm-report which is responsible for doing the report
output uses log_print too, we need to use a different kind of log_print
which bypasses any log report currently used for logging (...simply,
we can't call log_print to output the log report itself which in turn
would again reroute to report - the report would never get on output
this way).
This patch adds structures and functions to reroute error and warning
logs to log report, if it's set.
There are 5 new functions:
- log_set_report
Set log report where logging will be rerouted.
- log_set_report_context
Set context globally so any report_cmdlog call will use it.
- log_set_report_object_type
Set object type globally so any report_cmdlog call will use it.
- log_set_report_object_name_and_id
Set object ID and name globally so any report_cmdlog call will use it.
- log_set_report_object_group_and_group_id
Set object group ID and name globally so any report_cmdlog call will use it.
These functions will be called during LVM command processing so any logs
which are rerouted to log report contain proper information about current
processing state.
lvm fullreport executes 5 subreports (vg, pv, lv, pvseg, seg) per each VG
(and so taking one VG lock each time) within one command which makes it
easier to produce full report about LVM entities.
Since all 5 subreports for a VG are done under a VG lock, the output is
more consistent mainly in cases where LVM entities may be changed in
parallel.
New report/output_format configuration sets the output format used
for all LVM commands globally. Currently, there are 2 formats
recognized:
- basic (the classical basic output with columns and rows, used by default)
- json (output is in json format)
Add new --reportformat option and new report_format_init function that
checks this option and creates new report group accordingly, also
preparing log report handle and adding it to the report group just
created.
This is a preparation for new CMDLOG report type which is going to be
used for reporting LVM command log.
The new report type introduces several new fields (log_seq_num, log_type,
log_context, log_object_type, log_object_group, log_object_id, object_name,
log_message, log_errno, log_ret_code) as well as new configuration settings
to set this report type (report/command_log_sort and report/command_log_cols
lvm.conf settings).
This patch also introduces internal report_cmdlog helper function
which is a wrapper over dm_report_object to report command log via
CMDLOG report type and which is going to be used throughout the code
to report the log items.
This fixes a problem in commit ae0a8740c. The problem
in that commit was that all existing PVs are initially
dropped from lvmetad. This works if the VG is updated
at the end, which replaces the dropped PVs, but if the
rescan finds that the VG seqno is unchanged, it leaves
the cached VG in place. So, we should only drop the
existing PVs in lvmetad when the VG is going to be updated.
Original code missed to catch all apperances of SIGINT.
Also enhance logging when running in shell without tty.
Accept this regex as valid input:
'^[ ^t]*([Yy]([Ee]([Ss]|)|)|[Nn]([Oo]|))[ ^t]*$'
Some commands scan labels to populate lvmcache multiple
times, i.e. lvmcache_init, scan labels to fill lvmcache,
lvmcache_destroy, then later repeat
Each time labels are scanned, duplicates are detected,
and preferred devices are chosen. Each time this is done
within a single command, we want to choose the same
preferred devices. So, check for existing preferences
when choosing preferred devices.
This also fixes a problem with the list of unused duplicate
devs when run in an lvm shell. The devs had been allocated
from cmd memory, resulting in invalid list entries between
commands.
A number of places are working on a specific dev when they
call lvmcache_info_from_pvid() to look up an info struct
based on a pvid. In those cases, pass the dev being used
to lvmcache_info_from_pvid(). When a dev is specified,
lvmcache_info_from_pvid() will verify that the cached
info it's using matches the dev being processed before
returning the info. Calling code will not mistakenly
get info for the wrong dev when duplicate devs exist.
This confusion was happening when scanning labels when
duplicate devs existed. label_read for the first dev
would add an info struct to lvmcache for that dev/pvid.
label_read for the second dev would see the pvid in
lvmcache from first dev, and mistakenly conclude that
the label_read from the second dev can be skipped
because it's already been done. By verifying that the
dev for the cached pvid matches the dev being read,
this mismatch is avoided and the label is actually read
from the second duplicate.
If a command gets stuck during an lvmetad update, lvmetad
will cancel that update after the timeout. The next command
to check the lvmetad will see that lvmetad needs to be
populated because lvmetad will return token of "none" after
a timed out update (same as when lvmetad is not populated
at all after starting.)
If a command gets an error during an lvmetad update, it
will now just quit and leave its updating token in place.
That update will be cancelled after the timeout.
Treat loop device created with 'losetup -P' as regular
partitioned device - so if it has partition table,
prevent its usage in commands like 'pvcreate'.
Before 'pvcreate /dev/loop0' could have erased and formated as PV,
after this patch, device is filtered out and cannot be used.
Before this fix, when reporting 'lvm devtypes', the report was
initialized with incorrect reserved values - the ones used for
pvs/vgs/lvs report were used instead of NULL value (because devtypes
doesn't have any reserved values).
For example, trying to (incorrectly) use lv_name for the -S|--select
with lvm devtypes which doesn't have this field at all:
Before this patch (internal error issued):
$ lvm devtypes -S 'lv_name=lvol0'
Internal error: _check_reserved_values_supported: field-specific reserved value of type 0x0 for field not supported
Internal error: dm_report_init_with_selection: trying to register unsupported reserved value type, skipping report selection
DevType MaxParts Description
aoe 16 ATA over Ethernet
ataraid 16 ATA Raid
bcache 1 bcache block device cache
...
With this patch applied (correct error displayed about
unrecognized selection field):
$ lvm devtypes -S 'lv_name=lvol0'
Device Types Fields
-------------------
devtype_name - Name of Device Type exactly as it appears in /proc/devices. [string]
devtype_max_partitions - Maximum number of partitions. (How many device minor numbers get reserved for each device.) [number]
devtype_description - Description of Device Type. [string]
Special Fields
--------------
selected - Set if item passes selection criteria. [number]
help - Show help. [unselectable number]
? - Show help. [unselectable number]
Unrecognised selection field: lv_name
Selection syntax error at 'lv_name=lvol0'.
Use 'help' for selection to get more help.
Convert fields into using a single status ioctl call per LV.
This is a bit tricky since when there are more complicated
stacks, at this moment its undefined which values should be shown.
It's clear we need to cache more then single ioctl per LV,
but also we need to define more explicitely relation between
reported values for snapshots.
This patch is not a final state, rather a transitional step.
It should not be giving more 'worst' values then previous
many-ioctl-calls-per-lv solution.
Add function to obtain percentage value for cache lv_seg_status.
This API is rather evolving 'middle' step as the ultimate goal
is segment API fuctionality.
But first we need to be clear at reporting level which values
are needed to be reported for which LVs and segments.
Add more code to properly store status for snapshot segment
maintaining lvm2 fiction of COW and snapshot internal volumes.
The key issue here is however not though-through reporting
logic - as there is no single answer for whole line state.
It not counting with layer and we may need few more ioctl to
cover all reporting needs depending upon what is actually
needed.
In reality we need to 'cache' more ioctl status queries for
individual LVs and their segments (so they checked at most once).
The other 'hard' topic for conversion is mirror segment handling.
Also we definitelly need to relocate some logic into segment's methods,
yet it might be complex as we have not clear border between targets.
TODO: define more clearly how are reporting fields defined in case
we 'stack' volumes like - cache of stacked thin LV snapshot origin.
lv_refresh_suspend_resume() has escaped with fail ret code
after failing suspend and could have left many volumes in suspend state.
So always unconditionally call resume also when suspend has failed.
