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1071 Commits

Author SHA1 Message Date
Bryn M. Reeves
f868624f85 WHATS_NEW_DM: fix histogram entries for 1.02.107
The histogram entries were under the wrong version (1.02.106). Fix
that and describe the library changes in more detail.
2015-09-04 19:53:10 +01:00
Zdenek Kabelac
a3c7e326c3 libdm: relocate parsing of thin-pool status
Use single routine for parsing status.

Internally we do not need to allocate pool memory for
passed struct.
2015-09-03 23:34:36 +02:00
Peter Rajnoha
fc35b6988d libdm: pkgconfig: fix devmapper.pc to not reference nonexistent rt.pc file
librt doesn't have a pkgconfig file so use Libs.private: -lrt instead
to declare the dependency directly.

The same applies for -lm which is also used and which hasn't been
defined in the devmapper.pc file yet.
2015-09-03 09:28:42 +02:00
Bryn M. Reeves
3c0fc6f0da dmstats: add histogram support
Add support to dmstats to create and report histograms.

Add a --histogram switch to 'create' that accepts a string
description of bin boundaries and DR_STATS and DR_STATS_META fields
to report bin configuration and absolute and relative histogram
values:

  hist_bins
  hist_bounds
  hist_ranges
  hist_count
  hist_count_bounds
  hist_count_ranges
  hist_percent
  hist_percent_bounds
  hist_percent_ranges

A new 'histogram' subcommand displays a report that emphasizes
histogram data as either counters or percentage values.
2015-09-02 21:02:12 +01:00
Bryn M. Reeves
a0cf3d47f1 libdm: add latency histogram support
Add support for creating, parsing, and reporting dm-stats latency
histograms on kernels that support precise_timestamps.

Histograms are specified as a series of time values that give the
boundaries of the bins into which I/O counts accumulate (with
implicit lower and upper bounds on the first and last bins).

A new type, struct dm_histogram, is introduced to represent
histogram values and bin boundaries.

The boundary values may be given as either a string of values (with
optional unit suffixes) or as a zero terminated array of uint64_t
values expressing boundary times in nanoseconds.

A new bounds argument is added to dm_stats_create_region() which
accepts a pointer to a struct dm_histogram initialised with bounds
values.

Histogram data associated with a region is parsed during a call to
dm_stats_populate() and used to build a table of histogram values
that are pointed to from the containing area's counter set. The
histogram for a specified area may then be obtained and interogated
for values and properties.

This relies on kernel support to provide the boundary values in
a @stats_list response: this will be present in 4.3 and 4.2-stable. A
check for a minimum driver version of 4.33.0 is implemented to ensure
that this is present (4.32.0 has the necessary precise_timestamps and
histogram features but is unable to report these via @stats_list).

Access methods are provided to retrieve histogram values and bounds
as well as simple string representations of the counts and bin
boundaries.  Methods are also available to return the total count
for a histogram and the relative value (as a dm_percent_t) of a
specified bin.
2015-09-02 20:48:59 +01:00
Alasdair G Kergon
cb57f4f89b libdm: Reinstate dm_task_get_info@Base.
Move the version script local:* wildcard into a node of its own
to avoid conflicting with in-source export macro definitions.
2015-09-01 16:26:02 +01:00
Alasdair G Kergon
d797f4d590 post-release 2015-08-26 23:13:34 +01:00
Alasdair G Kergon
a37fd93fbb pre-release 2015-08-26 23:11:13 +01:00
Bryn M. Reeves
463f59eca4 dmstats: add 'precise' flag field to stats report
Add a flag indicating whether or not precise_timestamps are enabled for
a given region or area.
2015-08-24 20:03:21 +01:00
Bryn M. Reeves
e4145ebc47 dmstats: add --precise switch to enable nanosecond counters. 2015-08-24 20:03:21 +01:00
Bryn M. Reeves
f4262026b6 libdm: add precise timestamps support to libdm-stats
Add support for the kernel precise_timestamps feature. This allows
regions to be created using counters with nanosecond precision.

A new dm_stats method, dm_stats_set_precise_timestamps() causes all
future regions created with this handle to attempt to enable precise
counters.
2015-08-24 20:03:21 +01:00
Alasdair G Kergon
d1c65d1b28 post-release 2015-08-17 17:26:20 +01:00
Alasdair G Kergon
be1db6b6c1 pre-release 2015-08-17 17:20:14 +01:00
Alasdair G Kergon
b297d78367 WHATS_NEW: Update. 2015-08-16 01:16:16 +01:00
Bryn M. Reeves
4d5b618d52 WHATS_NEW_DM: recent commits (stats field split and timestamp headers) 2015-08-14 13:43:12 +01:00
Alasdair G Kergon
043fb32c4b dmsetup: Restructure arg handling.
Introduce enums and global variables to record cleanly which command we
are processing and eliminate the historically inconsistent use of the
shifted argv[0] and fix assorted bugs discovered along the way.

Add dm_report_is_empty() to indicate there is no data awaiting output
and use this to suppress dmsetup report headings when no data is output
so we don't get a stray line saying 'Help' at the end of reporting help.

Define a report type (as the interface requires) so -o all selects
the right fields in splitname.  (A fix for stats list will follow.)

Exit immediately if no device is supplied to dmsetup wipe_table instead
of hitting errors later and failing.

Adjust the command name printed in usage/help output to match command
invoked (most of the time).
2015-08-13 22:30:39 +01:00
Bryn M. Reeves
6b81ac5807 dmstats: replace --force with new stats-specific --alldevices
The '--force' switch is only used by dmstats to allow either
creation or deletion of one or more regions on all devices.

These operations do not carry any risk: just a possible mess of
region IDs to be cleaned up.

Remove the use of '--force' for stats commands and change current
uses to a new '--alldevices' switch.
2015-08-13 19:05:46 +01:00
Zdenek Kabelac
08f047eb51 libdm: cache target arg validation
Add some arg validation for dm_tree_node_add_cache_target().
2015-08-12 14:33:15 +02:00
Alasdair G Kergon
5383697c78 post-release 2015-08-10 01:02:31 +01:00
Alasdair G Kergon
0b05048341 pre-release 2015-08-10 00:40:42 +01:00
Bryn M. Reeves
d62a8d2f15 dmstats: add libdm-stats library and 'dmsetup stats' command
Add the libdm-stats module to libdm: this implements a simple interface
for creating, managing and interrogating I/O statistics regions and
areas on device-mapper devices.

The library interface is documented in libdevmapper.h and provides a
'dm_stats' handle that is used to perform statistics operations and
obtain data.

Public methods are provided to create and destroy handles and to list,
create, and destroy statistics regions as well as to obtain and parse
counter data and calculate rate-based metrics.

This commit also adds a 'dmsetup stats' (aka 'dmstats') command with
'clear', 'create', 'delete', 'list', 'print', and 'report' sub-commands.

See the library documentation and the dmstats.8 manual page for detailed
API and command descriptions.
2015-08-09 14:37:58 +01:00
Bryn M. Reeves
f06d866110 WHATS_NEW_DM: Update for preliminary stats commits
Add entries for dm_report_column_headings() and report row leaks
and remove the dm_report interval/wait entry.
2015-08-08 17:48:30 +01:00
Alasdair G Kergon
559ca8bc65 dmsetup: Report timestamps of ioctls with -vvv.
If enabled, record timestamp immediately after the ioctl() returns.
2015-08-05 08:28:35 +01:00
Peter Rajnoha
a5b476a7d3 report: recognize report field name variants without any underscores too
Whenver reporting field name is registered with libdevmapper and if
the field name contains any number of underscores ('_'), libdm
can now automatically recognize any of its variant without any
underscores used.

For example:

..for underscores in prefixes:
  pvs -o pv_name
  pvs -o name
  pvs -o pvname (newly recognized besides pvname)

..for underscores in the name:
  lvs -o cache_mode
  lvs -o cachemode

..or even multiple underscores:
  pvs -o pv___na___me

It's all variant of the same field name.
2015-08-03 16:29:50 +02:00
Bryn M. Reeves
a161e29c59 dmsetup: Add --count and --interval to reports.
For example, to monitor active devices every second you can now run
dmsetup info -c --count 0.
2015-07-31 21:59:34 +01:00
Alasdair G Kergon
a28fb37b9e libdm: Add dm_timestamp functions. 2015-07-29 19:21:07 +01:00
Alasdair G Kergon
ce6a0f4469 post-release 2015-07-24 23:21:51 +01:00
Alasdair G Kergon
33eb7d7dfb pre-release 2015-07-24 23:20:42 +01:00
Alasdair G Kergon
1612c570b6 libdm: Use wrappers for all malloc functions.
Move the DEBUG_MEM decision inside libdevmapper.so instead of exposing
it in libdevmapper.h which causes failures if the binary and library
were compiled with opposite debugging settings.
2015-07-22 23:11:48 +01:00
Alasdair G Kergon
a421879bb5 post-release 2015-07-07 13:57:13 +01:00
Alasdair G Kergon
3472910177 pre-release 2015-07-07 13:54:37 +01:00
Alasdair G Kergon
dfe3eb12d0 include: Standardise around new tool.h. 2015-07-06 17:30:18 +01:00
Alasdair G Kergon
810ab095e6 macros: Wrap PRI with FMT.
Create a set of wrappers with embedded % such as
  #define FMTu64 "%" PRIu64
2015-07-06 15:09:17 +01:00
Alasdair G Kergon
b4e8de3a31 post-release 2015-07-03 16:58:24 +01:00
Alasdair G Kergon
36ce97c625 pre-release 2015-07-03 16:34:40 +01:00
Zdenek Kabelac
5bef18f2eb libdm: support for posting messages in suspend
Add support for sending message in suspend tree for thin-pools.
When this operation is requested whole subtree suspend is then skipped.

This is experimantal support for new lvm2 code for sending message
in suspend phase where 'thin-pool origin-only suspend' will send
messages instead of really suspending thin-pool tree.

When suspening thin volume origin-only - only thin volume is suspended,
then messages are posted and thin-pool suspend is skipped.
2015-07-03 16:13:14 +02:00
Peter Rajnoha
335707b0e2 report: add infrastructure to recognize fuzzy reserved names and returning dynamic reserved values
With fuzzy names we mean the names for which it's hard or even impossible
to enumerate all possible variations of the name - the name needs to
be evaluated. An example of fuzzy name is a name which has a base
(substring) which matches and it can contain arbitrary variations
around this base. We can cover human language better with fuzzy
names as people may use several different names (or sentences) to
denote the same thing.

With dynamic values we mean the values which are not constants
and they need to be evaluated in runtime. An example of dynamic
value is a value which depends on current system state (e.g. time,
current configuration or any other state which may change and it
needs runtime evaluation).

There's a handler that can be registered with reporting/selection
using dm_report_reserved_handler instance. This is a central point
in which the computation/evaluation happens when processing reserved
values. Currently, there are two actions declared:

  DM_REPORT_RESERVED_PARSE_FUZZY_NAME
  (translates fuzzy name into canonical name)

  DM_REPORT_RESERVED_GET_DYNAMIC_VALUE
  (gets value for canonical name)

The handler is then registered as value in struct
dm_report_reserved_value (see explaining comments besided
the struct dm_report_reserved_value in libdevmapper.h).

Also, this patch provides support for simple caching of values
used during report/selection via dm_report_value_cache_{set,get}.
This is supposed to be used mainly in the dm_report_reserved_handler
instances to save values among calls so all the handler calls work
with the same base value used in computation/evaluation and/or
possibly to save resources if the evaluation is more time-consuming.
The cache is attached to the dm_report handle and so the cache is
dropped one dm_report is dropped.
2015-07-03 10:47:09 +02:00
Zdenek Kabelac
21c0b1134f libdm: enhance tracing messages
Use new _node_name() and print name major:minor for thin-pool device.
2015-07-01 13:44:28 +02:00
Alasdair G Kergon
3489e68ef7 post-release 2015-06-30 17:12:56 +01:00
Alasdair G Kergon
a3af8b0626 pre-release 2015-06-30 17:11:21 +01:00
Peter Rajnoha
ded279f826 report: add support for time (basic)
This patch adds support for time values used in reporting fields.
The raw values are always stored as number of seconds since epoch.

The support that comes with this patch is the basic one which allows
only for recognition of strictly formatted date and time in selection
criteria (the format follows a subset of formats defined by ISO 8601):

  date time timezone

  date:
    YYYY-MM-DD (or shortly YYYYMMDD)
    YYYY-MM (shortly YYYYMM), auto DD=1
    YYYY, auto MM=01 and DD=01

  time:
    hh:mm:ss (or shortly hhmmss)
    hh:mm (or shortly hhmm), auto ss=0
    hh (or shortly hh), auto mm=0, auto ss=0

  timezone (always with + or - sign):
    +hh:mm or -hh:mm (or shortly +hhmm or -hhmm)
    +hh or -hh

Or directly the time (number of seconds) since Epoch (1970-01-01 00:00:00 UTC)
when the number value is prefixed by "@":

   @number_of_seconds_since_epoch

This patch also adds aliases for comparison operators
used together with time values which are more intuitive
to use:
  since (as alias for >=)
  after (as alias for >)
  until (as alias for <=)
  before (as alias for <)

For example:

$ lvmconfig --type full report/time_format
time_format="%Y-%m-%d %T %z %Z [%s]"

$ lvs -o name,time vg
  LV    Time
  lvol0 2015-06-28 21:25:41 +0200 CEST [1435519541]
  lvol1 2015-06-30 03:25:43 +0200 CEST [1435627543]
  lvol2 2015-04-26 14:52:20 +0200 CEST [1430052740]
  lvol3 2015-06-30 14:52:23 +0200 CEST [1435668743]

$ lvs vg -o name,time -S 'time since "2015-04-26 15:00" && time until "2015-06-30"'
  LV    Time
  lvol0 2015-06-28 21:25:41 +0200 CEST [1435519541]
  lvol1 2015-06-30 03:25:43 +0200 CEST [1435627543]
  lvol3 2015-06-30 14:52:23 +0200 CEST [1435668743]

$ lvs vg -o name,time -S 'time since "2015-04-26 15:00" && time until "2015-06-30 6:00"'
  LV    Time
  lvol0 2015-06-28 21:25:41 +0200 CEST [1435519541]
  lvol1 2015-06-30 03:25:43 +0200 CEST [1435627543]

$ lvs vg -o name,time -S 'time since @1435519541'
  LV    Time
  lvol0 2015-06-28 21:25:41 +0200 CEST [1435519541]
  lvol1 2015-06-30 03:25:43 +0200 CEST [1435627543]
  lvol3 2015-06-30 14:52:23 +0200 CEST [1435668743]

This is basic time recognition support that is directly a part of
libdevmapper. Recognition of more free-form expressions will be a
part of subsequent patches.
2015-06-30 15:15:10 +02:00
Peter Rajnoha
d8996a17d1 select: add support for range reserved values and flagging named-only values
This patch allows for registration and recognition of reserved
values which are ranges, so they're composed of two values actually
to denote the lower and upper bound for the range (stored as an array
with exactly two items to define the boundaries).

Also, this patch allows for flagging reserved values as named-only
which means that such values are not strictly reserved. The strictly
reserved values are reserved values as used before this patch.

Distinction between strictly-reserved and named-only values
is clearly visible with comparisons. Normally, strictly reserved
value is not accounted for if we do "greater than" or "lower than"
comparisons, for example:

1  2  3 ....
   |
  abc

- we have "abc" as reserved value for field with value "2"
- the value reported for the field is "abc" (or "2", it doesn't matter here)
- the selection we're processing is -S 'field < abc'
- the result of the selection gives nothing as "abc" is strictly
reserved value (bound to "2") and there's no order defined for
it and it would only match if we directly compared the value
(so -S 'field = abc' would match)

With named-only values, the "abc" is named-only value for "2",
so selection -S 'field < abc" is the same as using -S 'field < 2'.
The "abc" is just an alias for some value so the value or its
assigned name can be used equally in selection criteria.
2015-06-30 10:47:50 +02:00
Peter Rajnoha
a25d92c88b WHATS_NEW: recent commits - config value format flags 2015-06-24 11:34:02 +02:00
Alasdair G Kergon
50d70eff35 post-release 2015-06-20 01:05:21 +01:00
Alasdair G Kergon
134b727b4f pre-release 2015-06-20 00:57:35 +01:00
Zdenek Kabelac
69132f55ea libdm: add dm_tree_node_set_thin_pool_read_only
Support thin-pool tree node with activation in read-only mode.
(Native kernel API).
2015-06-18 15:15:39 +02:00
Zdenek Kabelac
9a06ae7b35 libdm: better debug message
Print reason for failing ioctl if thin pool message fails.
2015-06-15 14:48:04 +02:00
Alasdair G Kergon
f715fefe31 post-release 2015-06-12 21:42:57 +01:00
Alasdair G Kergon
2c64762a40 pre-release 2015-06-12 21:40:56 +01:00
Alasdair G Kergon
eeb498627c libdm: Add dm_task_get_errno to return ioctl errno.
There are reports of unexplained ioctl failures when using dmeventd.
An explanation might be that the wrong value of errno is being used.

Change libdevmapper to store an errno set by from dm ioctl() directly
and provide it to the caller through a new dm_task_get_errno() function.

[Replaced f9510548667754d9209b232348ccd2d806c0f1d8]
2015-05-26 15:13:49 +01:00
Alasdair G Kergon
2fca6cdeb3 post-release 2015-05-15 23:28:47 +01:00
Alasdair G Kergon
0300730cc9 pre-release 2015-05-15 23:19:29 +01:00
Zdenek Kabelac
797c18d543 libdm: new dm_task_get_info with internal_suspend
Introduce new implmentation of dm_task_get_info() function
with support for reading internal_suspend.
.
This time it is done in a 'versioned' way.

We keep the old fashion dm_task_get_info(Base) to implement
the old behavior of 1.02.95 libdm code.

libdm version 1.02.96 introduced 'macro' wrapper
dm_task_get_info_with_deferred_remove with new implementation
of dm_task_get_info() - we cannot do anything else then to
provide compatible version of this symbol.

Now in version 1.02.97 we add new versioned implementation of
dm_task_get_info(DM_1_02_97) symbol.

This has the effect that i.e. rpm build will finaly resolve proper
dependency on a new symbol - so it will be no longer possible,
to build a new binary and use old library
(rpm -q --provides will show libdevmapper.so.1.02(DM_1_02_97)(64bit))

Also the history is now tracked. If a new function is added (or
reimplemented), it needs to be placed in proper file,
so it could be exported with right versioning symbol.
File .exported_symbols.Base should and any existing older DM
should be treated as read-only after a release.

Also - only libdm has been currently enhanced with versioned .Base
file, as soon as other libs (liblvm, libdevmapper-event) needs changes
they should also get their exported symbol files - meanwhile
make.tmpl handles both cases.
2015-05-15 16:48:22 +02:00
Alasdair G Kergon
9fb93fcd90 post-release 2015-05-02 01:52:05 +01:00
Alasdair G Kergon
bee2df3903 pre-release 2015-05-02 01:41:17 +01:00
Peter Rajnoha
82f6dbfaf7 select: fix matching reserved values while <,<=,>,>= is used in selection criteria
Scenario:

$ vgs -o+vg_mda_copies
  VG     #PV #LV #SN Attr   VSize VFree #VMdaCps
  fedora   1   2   0 wz--n- 9.51g    0  unmanaged
  vg      16   9   0 wz--n- 1.94g 1.83g         2

$ lvs -o+read_ahead vg/lvol6 vg/lvol7
  LV    VG   Attr       LSize Pool Origin Data%  Rahead
  lvol6 vg   Vwi-a-tz-- 1.00g pool lvol5  0.00      auto
  lvol7 vg   Vwi---tz-k 1.00g pool lvol6         256.00k

Before this patch:

$vgs -o vg_name,vg_mda_copies -S 'vg_mda_copies < unmanaged'
  VG   #VMdaCps
  vg          2

Problem:
Reserved values can be only used with exact match = or !=, not <,<=,>,>=.
In the example above, the "unamanaged" is internally represented as
18446744073709551615, but this should be ignored while not comparing
field directly with "unmanaged" reserved name with = or !=. Users
should not be aware of this internal mapping of the reserved value
name to its internal value and hence it doesn't make sense for such
reserved value to take place in results of <,<=,> and >=.
There's no order defined for reserved values!!! It's a special
*reserved* value that is taken out of the usual value range
of that type.

This is very similar to what we have already fixed with
2f7f6932dc, but it's the other way round
now - we're using reserved value name in selection criteria now
(in the patch 2f7f693, we had concrete value and we compared it
with the reserved value). So this patch completes patch 2f7f693.

This patch also fixes this problem:

$ lvs -o+read_ahead vg/lvol6 vg/lvol7 -S 'read_ahead > 32k'
  LV    VG   Attr       LSize Pool Origin Data%  Rahead
  lvol6 vg   Vwi-a-tz-- 1.00g pool lvol5  0.00      auto
  lvol7 vg   Vwi---tz-k 1.00g pool lvol6         256.00k

Problem:
In the example above, the internal reserved value "auto" is in the
range of selection "> 32k" - it shouldn't match as well. Here the
"auto" is internally represented as MAX_DBL and of course, numerically,
MAX_DBL > 256k. But for users, the reserved value should be uncomparable
to any number so the mapping of the reserved value name to its interna
 value is transparent to users. Again, there's no order defined for
reserved values and hence it should never match if using <,<=,>,>=
operators.

This is actually exactly the same problem as already described in
2f7f6932dc, but that patch failed for
size field types because of incorrect internal representation used.

With this patch applied, both problematic scenarios mentioned
above are fixed now:

$ vgs -o vg_name,vg_mda_copies -S 'vg_mda_copies < unmanaged'
(blank)

$ lvs -o+read_ahead vg/lvol6 vg/lvol7 -S 'read_ahead > 32k'
  LV    VG   Attr       LSize Pool Origin Rahead
  lvol7 vg   Vwi---tz-k 1.00g pool lvol6  256.00k
2015-04-24 09:48:57 +02:00
Alasdair G Kergon
8853462528 libdm: Add uuid/devno to ioctl failure log message. 2015-04-23 19:26:52 +01:00
Alasdair G Kergon
1906619187 libdm: Add DM_INTERNAL_SUSPEND_FLAG.
Still needs to be reported by dmsetup.
2015-04-23 18:39:04 +01:00
Peter Rajnoha
e3c831030d WHATS_NEW: commit 375ed98 2015-04-14 15:28:42 +02:00
Alasdair G Kergon
83587f0555 post-release 2015-03-24 02:02:07 +00:00
Alasdair G Kergon
8bb1dfdd32 pre-release 2015-03-24 01:59:35 +00:00
Alasdair G Kergon
56606b5f21 post-release 2015-03-04 14:00:46 +00:00
Alasdair G Kergon
930fa3290d pre-release 2015-03-04 13:49:51 +00:00
Peter Rajnoha
123a3383a0 libdm: report: add dm_report_object_is_selected
The new dm_report_object_is_selected fn makes it possible to opt whether the
object reported should be displayed on output or not. Also, in addition to
that, it makes it possible to save the result of selection (either 0 or 1).

So dm_report_object_is_selected is simply  more general form of object
reporting fn - combinations now allow for:

  dm_report_object_is_selected(rh, object, 1, NULL):
  This is exactly the original dm_report_object fn and it's fully equal
  to it.

  dm_report_object_is_selected(rh, object, 0, selected):
  Do not display the result on output, but save info whether the object
  is selected or not in 'selected' variable.

  dm_report_object_is_selected(rh, object, 1, selected):
  Display the result on output (if it passes selection criteria) and save
  whether the object is selected or not in 'selected' variable.

  dm_report_object(rh, object, 0, NULL):
  This combination is not allowed - it will end up with internal error.
  We're either interested in selection status or we want to display the
  result on output or both, but never nothing of the two.
2015-02-10 16:04:38 +01:00
Alasdair G Kergon
99c443facc post-release 2015-01-30 16:18:43 +00:00
Alasdair G Kergon
d0837dcceb pre-release 2015-01-30 16:16:51 +00:00
Alasdair G Kergon
57f67ce855 post-release 2015-01-21 13:25:10 +00:00
Alasdair G Kergon
fa01faaa4a pre-release 2015-01-21 13:08:12 +00:00
Alasdair G Kergon
25d906dbde dmeventd: Reduce waitevent EINTR message severity. 2015-01-21 12:54:00 +00:00
Alasdair G Kergon
7cfc9a4f64 libdevmapper: Improve incompatible version msg. 2015-01-21 12:23:56 +00:00
Zdenek Kabelac
2908ab3eed thin: errrorwhenfull support
Support error_if_no_space feature for thin pools.
Report more info about thinpool status:
(out_of_data (D), metadata_read_only (M), failed  (F) also as health
attribute.)
2015-01-14 14:52:05 +01:00
Peter Rajnoha
5378a1a63e WHATS_NEW: f94f846 actually fixes DM issue, not LVM issue 2014-12-09 10:52:07 +01:00
Peter Rajnoha
5edf6a56c4 libdm: report: add dm_report_compact_fields
Add new dm_report_compact_fields function to cause report outout
(dm_report_output) to ignore fields which don't have any value set
in any of the rows reported. This provides support for compact report
output where only fields which have something to report are displayed.
2014-12-05 12:00:28 +01:00
Peter Rajnoha
44394cd246 libdm: remove unimplemented dm_report_set_output_selection fn
The dm_report_set_output_selection was not implemented in the end -
we have dm_report_init_with_selection instead. This is just a remnant
from development code that got into libdevmapper.h by mistake.
2014-12-05 11:54:25 +01:00
Alasdair G Kergon
9258e57a50 post-release 2014-11-28 23:07:31 +00:00
Alasdair G Kergon
e492861749 pre-release 2014-11-28 23:06:07 +00:00
Alasdair G Kergon
cd3b6070aa post-release 2014-11-24 17:48:25 +00:00
Alasdair G Kergon
2aca834724 pre-release 2014-11-24 17:46:50 +00:00
Petr Rockai
14472d62ba Update WHATS_NEW. 2014-11-23 23:30:27 +01:00
Zdenek Kabelac
fc935495c8 libdm: fix reporting of empty string list
Don't write behind the allocated array when list is empty.
Use index 0 for the allocated element.

Error triggered by i.e.:  lvs -a -o all,lv_modules
2014-11-22 18:50:53 +01:00
Stéphane Aulery
112302d41a man: fix (\+) syntax warning of Groff
Signed-off-by: Stéphane Aulery <saulery@free.fr>
2014-11-12 09:39:19 +01:00
Alasdair G Kergon
131aaeb634 post-release 2014-11-11 14:15:32 +00:00
Alasdair G Kergon
9a5910bdf9 pre-release 2014-11-11 14:13:00 +00:00
Zdenek Kabelac
824019531c libdm: tunning cache API
Support new PASSTHROUGH 'feature' flag.

Add dm_config_node to pass in policy args.

Really use origin_uuid instead of using extra call
to pass seg_areas.

Switch to 64bit feature flag bit set so there is
enough space in future for new bits...
2014-11-10 22:05:48 +01:00
Zdenek Kabelac
89233544e0 libdm: allow to activate any pool with tid == 0
When transaction_id is set 0 for thin-pool, libdm avoids validation
of thin-pool, unless there are real messages to be send to thin-pool.
This relaxes strict policy which always required to know
in front transaction_id for the kernel target.

It now allows to activate thin-pool with any transaction_id
(when transaction_id is passed in)

It is now upto application to validate transaction_id from life
thin-pool volume with transaction_id within it's own metadata.
2014-11-04 15:28:00 +01:00
Zdenek Kabelac
ed2a0560ad libdm: init char array
When non-root uses dm_check_version() it's been printing some unit
values from stack. So always init those vars.
2014-11-03 14:19:31 +01:00
Peter Rajnoha
2f7f6932dc report: selection: fix selection criteria to not match reserved values when using >, <, >=, <
Some values are reserved for special purpose like 'undefined', 'unmanaged' etc.
When using >, <, >= and < comparison operators where the range is considered,
do not include reserved values as proper values in this range which
would otherwise result in not so obvious criteria match (as the reserved value is
actually transparent for the user). It's incorrect.

Example scenario:
$ vgs -o vg_name,vg_mda_copies vg1 vg2
  VG   #VMdaCps
  vg1          1
  vg2  unmanaged

The "unmanaged" is actually mapped onto reserved value
18446744073709551615 (2^64 - 1) internally.

Such reseved value is already caught on selection criteria input
properly:

$ vgs -o name,vg_mda_copies vg1 vg2 -S 'vg_mda_copies=18446744073709551615'
  Numeric value 18446744073709551615 found in selection is reserved.

However, we still need to fix situaton where the reserved value may be
included in resulting range:

Before this patch:
$ vgs -o vg_name,vg_mda_copies vg1 vg2 -S 'vg_mda_copies >= 1'
  VG   #VMdaCps
  vg1          1
  vg2  unmanaged

With this patch applied:
$ vgs -o vg_name,vg_mda_copies vg1 vg2 -S 'vg_mda_copies >= 1'
  VG   #VMdaCps
  vg1         1

From the examples above, we can see that without this patch applied,
the vg_mda_copies >= 1 also matched the reserved value 18446744073709551615
(which is represented by the "unamanged" string on report). When
applying the operators, such values must be skipped! They're meant to
be matched only against their string representation only, e.g.:

$ vgs -o name,vg_mda_copies vg1 vg2 -S 'vg_mda_copies=unmanaged'
  VG   #VMdaCps
  vg2  unmanaged

...or any synonyms:

$ vgs -o name,vg_mda_copies vg1 vg2 -S 'vg_mda_copies=undefined'
  VG   #VMdaCps
  vg2  unmanaged
2014-10-27 11:25:08 +01:00
Zdenek Kabelac
482e572e5d libdm: add DM_LIST_HEAD_INIT macro
Support to initialize dm_list struct members.
2014-10-24 16:39:31 +02:00
Peter Rajnoha
5895657b59 libdm: fix dm_is_dm_major to not issue error about missing /proc lines for dm module.
This is probably better approach than 3880ca5eca.

If dm module is not loaded during dm_is_dm_major call, there are no
lines for dm in /proc/devices, of course. Normally, dm_is_dm_major
is called to check existing devices, hence if module is not loaded,
we can expect there's no DM device present at the same time so we
can directly return 0 here (meaning the major number being inspected
is not dm device's one).

See also https://bugzilla.redhat.com/show_bug.cgi?id=1059711.
2014-09-12 15:28:51 +02:00
Peter Rajnoha
25ae9383bb revert: commit 3880ca5eca
There's a better solution to this...
2014-09-12 15:28:51 +02:00
Peter Rajnoha
3880ca5eca libdm: use dm-mod autoloading during dm_is_dm_major call if needed
For dm_is_dm_major to determine whether the major number given as
an argument belongs to a DM device, libdm code needs to know what
the actual DM major is to do the comparison.

It may happen that the dm-mod module is not loaded during this
call and so for the completness let's try our best before we start
giving various errors - we can still make use of dm-mod autoloading,
though only since kernels 2.6.36 where this feature was introduced.
2014-09-12 12:49:37 +02:00
Alasdair G Kergon
b25e0086b6 post-release 2014-09-01 01:53:44 +01:00
Alasdair G Kergon
fcb433abec pre-release 2014-09-01 01:51:47 +01:00
Zdenek Kabelac
91a453de05 WHATS_NEW_DM 2014-08-29 13:10:19 +02:00
Alasdair G Kergon
dd9700f192 post-release 2014-08-26 16:41:18 +01:00
Alasdair G Kergon
8b8d21f873 pre-release 2014-08-26 16:34:14 +01:00
Zdenek Kabelac
8f518cf197 libdm: add check transaction_id after message
Add extra safety detection for thin pool transaction id
and query pool status after confirmed message.

In case there is a missmatch, immeditelly abort further
processing.
2014-08-26 14:12:20 +02:00
Peter Rajnoha
02dc3c773e report: add dm_report_field_string_list_unsorted 2014-08-25 16:11:40 +02:00
Alasdair G Kergon
42e07d2bce dmsetup: Support remove --deferred.
This patch adds a new flag --deferred to dmsetup remove. If this flag is
specified and the device is open, it is scheduled to be deleted on
close.

struct dm_info is extended.

The existing dm_task_get_info() is converted into a wrapper around the
new version dm_task_get_info_with_deferred_remove() so existing binaries
can still use the old smaller structure.

Recompiled code will pick up the new larger structure.

From: Mikulas Patocka <mpatocka@redhat.com>
2014-08-16 00:34:48 +01:00
Alasdair G Kergon
8a7682cbc9 libdm: Add DM_DEFERRED_REMOVE to dm-ioctl.h. 2014-08-15 13:45:55 +01:00
Peter Rajnoha
fa793bed64 select: add support for selection to match string list subset, recognize { } operator
Using "[ ]" operator together with "&&" (or ",") inside causes the
string list to be matched if and only if all the items given match
the value reported and the number of items also match. This is
strict list matching and the original behaviour we already have.

In contrast to that, the new "{ }" operator together with "&&" inside
causes the string list to be matched if and only if all the items given
match the value reported but the number of items don't need to match.
So we can provide a subset in selection criteria and if the subset
is found, it matches.

For example:

$ lvs -o name,tags
  LV    LV Tags
  lvol0 a
  lvol1 a,b
  lvol2 b,c,x
  lvol3 a,b,y

$ lvs -o name,tags -S 'tags=[a,b]'
  LV    LV Tags
  lvol1 a,b

$ lvs -o name,tags -S 'tags={a,b}'
  LV    LV Tags
  lvol1 a,b
  lvol3 a,b,y

So in the example above the a,b is subset of a,b,y and therefore
it also matches.

Clearly, when using "||" (or "#") inside, the { } and [ ] is the
same:

$ lvs -o name,tags -S 'tags=[a#b]'
  LV    LV Tags
  lvol0 a
  lvol1 a,b
  lvol2 b,c,x
  lvol3 a,b,y

$ lvs -o name,tags -S 'tags={a#b}'
  LV    LV Tags
  lvol0 a
  lvol1 a,b
  lvol2 b,c,x
  lvol3 a,b,y

Also in addition to the above feature, fix list with single value
matching when using [ ]:

Before this patch:
$ lvs -o name,tags -S 'tags=[a]'
  LV    LV Tags
  lvol0 a
  lvol1 a,b
  lvol3 a,b,y

With this patch applied:
$ lvs -o name,tags -S 'tags=[a]'
  LV    LV Tags
  lvol0 a

In case neither [] or {} is used, assume {} (the behaviour is not
changed here):

$ lvs -o name,tags -S 'tags=a'
  LV    LV Tags
  lvol0 a
  lvol1 a,b
  lvol3 a,b,y

So in new terms 'tags=a' is equal to 'tags={a}'.
2014-08-13 16:10:12 +02:00
Peter Rajnoha
6dd98c1fa8 select: fix string list selection to match whole words only but not prefixes of searched string
$ lvs -o name,tags vg/lvol0
  LV    LV Tags
  lvol0 a

Before this patch:

$ lvs -o name,tags vg/lvol0 -S 'tags=[a]'
  LV    LV Tags
  lvol0 a

$ lvs -o name,tags vg/lvol0 -S 'tags=[ab]'
  LV    LV Tags
  lvol0 a
(incorrect!)

$ lvs -o name,tags vg/lvol0 -S 'tags=[abc]'
  LV    LV Tags
  lvol0 a
(incorrect!)

With this patch applied:

$ lvs -o name,tags vg/lvol0 -S 'tags=[a]'
  LV    LV Tags
  lvol0 a

$ lvs -o name,tags vg/lvol0 -S 'tags=[ab]'
(no result - correct!)

$ lvs -o name,tags vg/lvol0 -S 'tags=[abc]'
(no result - correct!)
2014-08-13 16:04:02 +02:00
Alasdair G Kergon
26885ea119 post-release 2014-08-05 02:12:20 +01:00
Alasdair G Kergon
9d4e1e51a9 pre-release 2014-08-05 02:07:35 +01:00
Alasdair G Kergon
7cff640d9a activation: Fix upgrades using uuid suffixes.
2.02.106 added suffixes to some LV uuids in the kernel.

If any of these LVs is activated with 2.02.105 or earlier,
and then a later version is used, the LVs appear invisible and
activation commands fail.

The code now has to check the kernel for both old and new uuids.
2014-07-30 21:55:11 +01:00
Alasdair G Kergon
321bed7137 post-release 2014-07-23 16:23:52 +01:00
Alasdair G Kergon
25fa725b05 pre-release 2014-07-23 16:05:22 +01:00
Peter Rajnoha
e38af4e28f libdm: report: fix string list internal representation if delimiter is composed of more than one char 2014-07-10 16:18:05 +02:00
Peter Rajnoha
4b65d7ec72 WHATS_NEW: commits a473435..7021c8f1 2014-07-07 16:52:43 +02:00
Alasdair G Kergon
29ca0573ba post-release 2014-06-23 15:23:09 +01:00
Alasdair G Kergon
0bb6ffb81f pre-release 2014-06-23 14:16:39 +01:00
Alasdair G Kergon
8d27f8e003 pre-release 2014-06-23 14:03:32 +01:00
Peter Rajnoha
a40bc36b2e libdevmapper: revoke commit 7c86131233
We have "help" and "?" defined as implicit fields now. As such, we
don't need to export these names in libdevmapper (as it was introduced
by commit 7c86131233 within this release).
If anyone uses these field names by mistake, the libdevmapper code can
error out correctly if it detects that the set of explicit field names
(the ones supplied by "fields" arg in dm_report_init/dm_report_init_with_selection)
contains any of the implicit field names (the ones defined internally
by libdevmapper itself).
2014-06-19 16:09:32 +02:00
Peter Rajnoha
cd7325f18d report: make "help" and "?" field implicit
Making "help" and "?" implicit also simplifies code since the
dm_report_init caller (lvm/dmsetup) doesn't need to check on
dm_report_init return whether "help" or "?" was hit while parsing
fields/sort keys in libdevmapper.

The libdevmapper now sets internal "RH_ALREADY_REPORTED" flag
after it reports the "help" or "?" implicit field. Then libdevmapper
itself checks for this flag in dm_report_object and if found,
the actual reporting is skipped (because the "help" implicit field
was reported instead of the actual report).
2014-06-19 16:09:31 +02:00
Peter Rajnoha
ca1abe70ff WHATS_NEW: commit 76467bdcfd
Ordering string list items on reports is also new compared to
previous state where items were not ordered at all and they
got reported simply as they appeared/were processed.
2014-06-18 12:30:34 +02:00
Peter Rajnoha
63f5be0170 WHATS_NEW: commits 7dbbc05a69c4cb9756464720cad29e3c1ed971c3..b16f5633ab199dedfd25f08562f686a6fb4aba9d
Report selection support...
2014-06-18 10:48:53 +02:00
Peter Rajnoha
fea8abe56a systemd: use RemoveOnStop for dm-event.socket and lvm2-lvmetad.socket
Systemd version 214 introduced new "RemoveOnStop" option for socket
units to remove the socket/FIFO when the particular unit is stopped.

Also https://bugzilla.redhat.com/show_bug.cgi?id=802748.
2014-06-13 15:45:25 +02:00
Zdenek Kabelac
93c2614e56 man: document DM_DEFAULT_NAME_MANGLING_MODE
Document DM_DEFAULT_NAME_MANGLING_MODE environmental variable.
(its default setting is build time configurable)
2014-06-05 17:47:21 +02:00
Zdenek Kabelac
3cb2658fb7 dmsetup: add warning
Warn when --udevcookie/DM_UDEV_COOKIE is used with 'dmsetup remove --force'.

When command is doing multiple ioctl operations on a single device,
it may invoke udev activity, that is colliding with further ioctl commands.
The result of such operation becomes unpredictable.
Use of --retry could partially help...
2014-05-26 22:56:30 +02:00
Peter Rajnoha
7c86131233 report: export DM_REPORT_FIELD_RESERVED_NAME_{HELP,HELP_ALT} and show help on '<lvm_command> -O help'
Share DM_REPORT_FIELD_RESERVED_NAME_{HELP,HELP_ALT} between libdm and
any libdm user to handle reserved field names, in this case the virtual
field name to show help instead of failing on unrecognized field.
The libdm user also needs to check the field name so it can fire
proper code in this case (cleanup, exit etc.).
2014-05-15 10:58:14 +02:00
Peter Rajnoha
4360fdf89c libdevmapper: add dm_units_to_factor for size unit parsing
Actually moving the existing code from LVM to libdm for reuse.
2014-04-28 10:25:43 +02:00
Zdenek Kabelac
0b6d6bfb77 thin: dmeventd plugins support more minors
Kernel supports upto 1M (20bit) minors.
TODO: convert to hash to reduce memory requirements
2014-04-18 16:38:47 +02:00
Alasdair G Kergon
6320c3b905 post-release 2014-04-10 17:13:27 +01:00
Alasdair G Kergon
2043f8c729 pre-release 2014-04-10 16:28:28 +01:00
Zdenek Kabelac
6d3d2d5e3d libdm: check for _build_dev_path failure
Enhance internal function _build_dev_path for failure
if buffer would be too small.
Use memcpy instead printf for a single string.
2014-04-08 11:00:13 +02:00
Zdenek Kabelac
2c28197630 libdm: check for size when opening control node
Use dm_snprintf() to detect fail if open_control node would
not have fit into buffer.
2014-04-08 11:00:13 +02:00
Zdenek Kabelac
583fbdba84 libdm: fail if buffer for version is to short
Return fail error code, if supplied buffer is too small.
2014-04-08 11:00:12 +02:00
Zdenek Kabelac
f0003d3be5 libdm: always dm_lib_init mangling mode
If there ever would be a second call to dm_lib_init()
and envvar would be improperly set, some last set value
would be used while it should reset to default mangling mode.
2014-04-08 11:00:12 +02:00
Zdenek Kabelac
bd2500e62e libdm: track implicit dependecies
When the node enters dtree with implicit dependency, it
automatically has udev flags from parent node
and could not be changed later when the node has been
entered again via i.e lvm's preload tracking.

Resolve this by tracking whether the node has been
created by implicit dependency tracking or has been
entered explicitely. Implicit node could be later
upgraded by an explicit _add_dev() with proper udev_flags.

For implicit devices add special udev flags to avoid
any scan and udev rule processing if we resume such device.

Patch allows easier removing of orphan nodes.
2014-04-08 11:00:12 +02:00
Zdenek Kabelac
7a6c0e2425 dmeventd: wakeup timeout thread earlier
When the last entry in the timeout queue is unregistered,
wakeup sleeping condition, so the thread is deleted earlier.
So the thread resource is release earlier.

Also when monitored with tools like valgrind this eliminites reported
leak.
2014-03-10 12:24:07 +01:00
Zdenek Kabelac
2a9b62c7f9 dmeventd: remember number of log disablings
Individual events are handled through separate threads,
so once we have more then a single thread in this eventwait
sleeping, we got race on the dm_log setting, since
if one event is timeout out on alarm, while another is still waiting,
then dm log has been restored to NULL and the next sigalarm
has been reported as error.

Fix it by introducing counter which is protected via mutex,
and only when the last event is released, logging is restored.

TODO: libdm seems to have some static vars which may audit
for this type of use.
2014-03-10 12:22:47 +01:00
Zdenek Kabelac
203affffc7 libdm: enhance thin transaction_id validation
Reuse _node_send_messages for just checking
for valid transaction_id with preload.

This allows earlier detection of incosistent thin pool.

Code does the same thing, except for sending messages.
2014-02-24 21:06:31 +01:00
Zdenek Kabelac
c7b7cb60e4 libdm: hardening transaction_id validation
Improve testing of transation_id to not allow other difference
then either kernel TID is equal or is lower by oned and there
are queued messages for transaction.

Mark messages as submitted if the transaction_id is already matching.

Do not try to deactivate node on failure here and leave it on
proper error path of the caller.
2014-02-24 21:04:50 +01:00
Zdenek Kabelac
1911c61639 libdm: call preload callback only when success
Do not call node's preload callback, if there is
any failure during preload.
2014-02-24 21:01:13 +01:00
Zdenek Kabelac
8346f106b4 libdm: internal is_selinux_enabled wrapper
There is no point to call this external function more then once.
(As suggested by selinux developer)
2014-02-24 20:58:41 +01:00
Zdenek Kabelac
7ec8e691c4 libdm: use 64bit type for raid index
Used properly signed 64bit constant for shifting.
2014-02-15 11:36:37 +01:00
Peter Rajnoha
290e58b0b6 WHATS_NEW: latest commits 2014-02-06 18:19:24 +01:00
Peter Rajnoha
34e6d59bba WHATS_NEW: be more specific about cryptsetup version that sets the udev flags 2014-01-22 15:48:40 +01:00
Peter Rajnoha
36a09cf463 udev: drop cryptsetup specific rules from 10-dm.rules
These udev flags are set directly in cryptsetup for some
time now so there's no need to have it in our rules then.

See also:
https://code.google.com/p/cryptsetup/source/detail?spec=svn4f14b43a3d3e7310465005c401f37e19f8cb85e6&r=4f14b43a3d3e7310465005c401f37e19f8cb85e6
2014-01-22 15:18:57 +01:00
Alasdair G Kergon
899a079c8f post-release 2014-01-20 19:41:30 +00:00
Alasdair G Kergon
aa21e79991 pre-release 2014-01-20 19:22:56 +00:00
Zdenek Kabelac
5f90353636 libdm: WHATSNEW 2014-01-17 11:02:29 +01:00
Zdenek Kabelac
7c5feaed3b dmeventd: prevent busy looping on CPU
Use usleep when looping on DM_WAIT_RETRY.
2013-12-12 13:40:55 +01:00
Zdenek Kabelac
b87c148499 dmeventd: change locking code
Ensure global lock is being hold when working with thread->.
2013-12-12 13:38:55 +01:00
Zdenek Kabelac
4fc97980b6 dmeventd: drop taking timeout mutex
Taking _timeout_mutex is not needed when registering and unregistering.
Global mutex is already being hold for this case.
2013-12-12 13:32:49 +01:00
Alasdair G Kergon
b6d3fd62fc libdm: prevent empty config file section names
Change c353949597 to use existing
_dup_string_tok().  alloca() doesn't fail cleanly (and needs
replacing.)
2013-12-05 01:09:03 +00:00
Zdenek Kabelac
b3679590df dmeventd: simplify error path
Use common 'bad:' label for exit error path where
fifo is closed before exit().
2013-11-28 12:45:02 +01:00
Zdenek Kabelac
6fa95d17ee dmeventd: move format text to printf
Instead of passing argument with format string to printf(),
put the string as arg directly.
Also move there remains args to make the code shorter.
2013-11-22 21:00:51 +01:00
Zdenek Kabelac
eb4b03768f libdm: catch wrongly reported values
Add internal error warning when string value is used
as sort value for numerical field.

Using log_warn since the function itself does not return error,
so we do not confuse log_error() checker.
2013-11-15 12:38:37 +01:00
Alasdair G Kergon
322e7b3060 post-release 2013-11-13 14:11:11 +00:00
Alasdair G Kergon
77a1efeb8e release 2.02.104
87 files changed, 1207 insertions(+), 294 deletions(-)
2013-11-13 14:02:34 +00:00
Zdenek Kabelac
52f41baedb dmsetup: report error on stderr
Send error message on stdout, since after _display_info_long()
command return errors.

Patch makes consistent behavior for command:

dmsetup info -c non-existing-dev
&
dmsetup info non-existing-dev

Now both commands report error on stderr when they return error status
for non-existing device.
2013-11-01 13:05:03 +01:00
Mikulas Patocka
ed30145f4a libdm: fix races with udev
On modern systems udev manages nodes in /dev/mapper directory.
It creates, deletes and renames the nodes according to the
state of the kernel driver.

When the dmsetup is compiled without udev support (--enable-udev_sync)
and runs on the system with running udevd it tries to manage nodes in
/dev/mapper too, so it can race with udev.
dmsetup checks if the node was created/deleted/renamed with the stat
syscall, and skips the operation if it was. However, if udev
creates/deletes/renames the node after the stat syscall and before the
mknod/unlink/rename syscall, dmsetup reports an error.

Since in the system everything happened as expected, skip reporting
error for such case.

These races can be easily provoked by inserting sleep at appropriate
places.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2013-10-17 11:57:33 +02:00
Zdenek Kabelac
3ac7f927e1 libdm: do not show holders missing error
On older system this may not be present, so skip this error message.
2013-10-17 11:55:21 +02:00
mpatocka@redhat.com
efd1dc6bd3 headers: use __linux__ instead of linux
This file may be included by other programs, so it should be compliant
with the C standard.

* use __linux__ instead of linux - __linux__ is always defined, linux is
  not defined when gcc runs in standard-compliant mode (with -std=c89 or
  -std=c99) because the C standard doesn't allow polluting namespace
  with arbitrary defines.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2013-10-17 11:54:44 +02:00
Alasdair G Kergon
761b524519 post-release 2013-10-04 14:41:32 +01:00
Alasdair G Kergon
04d9a52684 release 2.02.103
52 files changed, 598 insertions(+), 264 deletions(-)
2013-10-04 14:32:23 +01:00
Peter Rajnoha
23ce3352d7 libdm: export DM_UDEV_SUBSYSTEM_FLAG names for subystem udev flags
Just like we have symbolic names assigned to general DM udev flags
(DM_UDEV_* flags), we have the same for any subsystem flags now
(DM_SUBSYSTEM_UDEV_FLAG*), making it easier to use.
2013-09-30 11:19:09 +02:00
Peter Rajnoha
ec9b3dcecc udev: make subsystem rules responsible for importing subsystem flags
Each subsystem rule that needs to import any of DM_SUBSYSTEM_UDEV_FLAG*
flags is responsible for doing so. This simply moves control of these
flags from general 10-dm.rules to any subsystem rule using these flags
as each subsystem knows better how to handle these flags on its own.
2013-09-30 11:11:18 +02:00
Alasdair G Kergon
229e0752f1 post-release 2013-09-23 15:55:11 +01:00
Alasdair G Kergon
c8057aec36 release 2.02.102
18 files changed, 137 insertions(+), 203 deletions(-)
2013-09-23 15:43:37 +01:00
Alasdair G Kergon
bd75844024 release 2.02.101
112 files changed, 4131 insertions(+), 1312 deletions(-)
2013-09-20 13:56:29 +01:00
Alasdair G Kergon
68f841fcda dmsetup: Detect invalid sector supplied to message.
atoll doesn't check for errors, so invalid sector numbers were silently
accepted in the "dmsetup message" command.

(Mikulas)
2013-09-18 01:24:19 +01:00
Alasdair G Kergon
a0ca2c11ee libdm: avoid leak if dm_task_set_* fn called again
(Mikulas)
2013-09-18 01:13:06 +01:00
Zdenek Kabelac
350cf7968c libdm: new name can't be empty
Do not allow passing '' names to kernel.

This test was missing also in kernel, so it has allowed
to create device with '' name.  This then confused dmsetup tool,
since such name is unexpected and unsupported. To remove
such name from table, user has to use -j -m to specify which device
should be removed.

This patch fixes the posibility to run this operation:

dmsetup rename existingdev ''

after this operation commands like  'dmsetup table' are failing.
This patch prohibits to use such name.
2013-08-31 21:40:28 +02:00
Alasdair G Kergon
d8b781e8ab dmsetup: display any message output from kernel
Recent kernels allow messages to respond with a string.
Add dm_task_get_message_response() to libdevmapper to perform some
basic sanity checks and return this.
Have 'dmsetup message' display any response.

DM statistics will make extensive use of this.

(From Mikulas.)
2013-08-16 15:25:39 +01:00
Alasdair G Kergon
32148369d1 post-release 2013-08-13 11:54:48 +01:00
Alasdair G Kergon
297907899c release 2.02.100
84 files changed, 1540 insertions(+), 442 deletions(-)

Mostly bug fixes this time.

Also note:
  md raid replaces dm mirroring as the default implementation.
  Can call out to thin_repair to fix thin metadata.
  Improved clvmd error detection/debugging information.
2013-08-13 11:29:21 +01:00
Peter Rajnoha
1cdd563b6c WHATS_NEW: move line to WHATS_NEW_DM 2013-08-06 11:42:01 +02:00
Zdenek Kabelac
5d9628475e libdm: add DM_ABORT_ON_INTERNAL_ERRORS
Support tests with abort when libdm encounters internal
error - i.e. for dmsetup tool.

Code execution will be aborted when
env var DM_ABORT_ON_INTERNAL_ERRORS is set to 1
2013-07-31 15:27:34 +02:00
Alasdair G Kergon
06dce7d539 post-release 2013-07-25 00:38:53 +01:00
Alasdair G Kergon
76e617b158 release 2.02.99
363 files changed, 19863 insertions(+), 9055 deletions(-)

This is a very large release - so expect bugs!

Please treat this release like a release candidate.
Changes to the external interfaces since 2.02.98 are not yet frozen.

Updated releases will follow quickly (days not weeks) as any problems
are handled.
2013-07-24 23:59:03 +01:00
Zdenek Kabelac
5658ec2bdc libdm: thin pool target sends messages once
Clear send_messages flag when they have been delivered successfully.
There is no need to validate it for all other activations of the same
node in the dm_tree.

Also add extra debug message which shows the reason for skipping
sending of messages because the transaction_id has already the matching
value.
2013-07-15 15:45:28 +02:00
Zdenek Kabelac
e5c30061fc libdm: remove unneeded read_ahead settings
Skip settings are read_ahead value which is already set in kernel.
2013-07-15 15:43:28 +02:00
Zdenek Kabelac
1b4f888bc5 libdm: add DM_ARRAY_SIZE
Add macro for reading detecting size of array.
2013-07-08 14:00:17 +02:00
Zdenek Kabelac
fd399d52a9 dmeventd: move code from signal handler
Instead of calling syslog() from signal event handler,
run all logging code in the main loop.

Also it needs to take the lock and check for list
only when really needed.
2013-07-01 23:06:11 +02:00
Alasdair G Kergon
c2dc21d89f text: miscellaneous comments & message tweaks 2013-06-15 01:28:54 +01:00
Zdenek Kabelac
c5c452a137 libdm: add public macro DM_TO_STRING
Since this stringifying macro is usable in more places,
move it to the public header with DM_ prefix.
2013-05-30 16:53:59 +02:00
Peter Rajnoha
798ed9ea1c WHATS_NEW: return success on dmeventd -V 2013-05-29 13:24:16 +02:00
Zdenek Kabelac
e992cb253c dmeventd: use dm_get_status_snapshot()
Switch to use libdm dm_get_status_snapshot() function for
reading status info.
This fixes bug, where the code was using 32bit integers,
while the snapshot target is able to return 64bit sizes.
However this also means, someone is using >1TB snapshot
cow devices, which is actually very bad idea anyway, since the
perfomance and memory usage in this case is very bad.
2013-05-27 10:33:06 +02:00
Zdenek Kabelac
4707ac7200 libdm: add dm_get_status_snapshot
Add dm_get_status_snapshot() for parsing snapshot status.
2013-05-27 10:30:51 +02:00
Zdenek Kabelac
7fab9a9dda libdm: improve detection of mounted fs
To detect mounted device, use also /proc/self/mountinfo
as so far the check was only able to detect ext4 mounted filesystem.

TODO:
Once proper testing for this feature is added, it may appear,
mountinfo check is enough and covers all cases and sysfs check
could be removed.
2013-05-20 16:47:31 +02:00
Zdenek Kabelac
1f30e5a052 libdm: introduce dm_mountinfo_read
Add function for parsing /proc/self/mountinfo entries.
This can be used to detected mounted device.
2013-05-20 16:28:30 +02:00
Zdenek Kabelac
a5ad1ee858 dmeventd: return error if device is not found
Do not return 'ok' status if we have failed to found device.
(Since it looks like the device is monitored)
2013-04-25 17:33:24 +02:00
Zdenek Kabelac
8184a57c2b dmeventd: prevent double free
Since device.name is relased on more places, mark already
released name with NULL.
2013-04-21 23:02:36 +02:00
Zdenek Kabelac
5ea466673a dmeventd: convert union to struct members
Sharing char* with field has a problem in error path,
when we allocate event, but fail to allocate timeout string.
Instead of creating complicated error paths to resolve
it individually stop using unions, and let the resource
to be released in a simple _free_message().
2013-04-21 23:01:35 +02:00
Zdenek Kabelac
3fd0242a0a libdm: validate params for NULL
Validate passed params and report error
instead of dereferencing NULL passed argument.
2013-04-05 14:13:12 +02:00
Peter Rajnoha
521a0a3323 dmsetup: fix 'splitname -o' to not fail if used without '-c'
This was a regression introduced with e33fd978a8
(libdm v1.02.68/lvm2 v2.02.89) with the introduction of new output
fields blkdevname and blkdevs_used for ls and deps dmsetup commands.

A new common '_process_options' fn was added with that commit, but the
fn was called prematurely which then broke processing of
'dmsetup splitname -o' which should implicitly use '-c' option
and this was failing after the commit:

  alatyr/~ $ dmsetup splitname -o lv_name /dev/mapper/vg_data-test
  Option not recognised: lv_name
  Couldn't process command line.

The '-c' had to be used for correct operation:

  alatyr/~ $ dmsetup splitname -c -o lv_name /dev/mapper/vg_data-test
  LV
  test

Now fixed to work as it did before:

  alatyr/~ $ dmsetup splitname -o lv_name /dev/mapper/vg_data-test
  LV
  test
2013-03-12 13:01:57 +01:00
Peter Rajnoha
03b5c51730 WHATS_NEW: add lines for config validation support 2013-03-06 11:00:30 +01:00
Peter Rajnoha
6c81cd26cc config: fix config node lookup inside empty sections to not return the section itself
When a section was empty in a configuration tree (no children - this is
allowed) and we were looking for a config node inside that section, the
_find_config_node function incorrectly returned the section itself if
the node inside that section was not found.

For example the configuration below:

The config:
    abc {
    }

And a function call to get the "def" node inside "abc" section:
     _find_config_node(..., "abc/def")

...returned the "abc" node instead of NULL ("def" not found).

This in turn caused segfaults in the code using lookups in such
a configuration tree as we (correctly) expected that the node
returned was always the one we were looking for or NULL if not
found. But if incorrect node was returned instead, we processed
that as if this was the node we were looking for and so we
processed its value as well. But sections don't have values => segfault.
2013-02-27 13:47:57 +01:00
Zdenek Kabelac
d2eae42c0e libdm: support newer thin pool status parameters
Support read_only and discards information.
2013-02-04 19:01:10 +01:00
Zdenek Kabelac
4f439707fd libdm: fix segault for truncated string token.
This patch fixes problem reported here:

https://www.redhat.com/archives/dm-devel/2013-January/msg00311.html

Fixing it by separating function for duplicating string token.

---
When /etc/lvm/lvm.conf is truncated at the first '"' of a line, all LVM
utilities crash with a segfault.

The segfault only seems to occur if the last character is the first '"'
(double quote) of a line. If you truncate it at any other point, lvm
detects the error and report parse error

lvm.conf ends like this.

$hexdump -C lvm.conf
....
69 72 20 3d 20 22 2f 64  65 76 22 0a 0a 0a 20 20  |ir = "/dev"...  |
20 20 23 20 41 6e 20 61  72 72 61 79 20 6f 66 20  |  # An array of |
64 69 72 65 63 74 6f 72  69 65 73 20 74 68 61 74  |directories that|
20 63 6f 6e 74 61 69 6e  20 74 68 65 20 64 65 76  | contain the dev|
69 63 65 20 6e 6f 64 65  73 20 79 6f 75 20 77 69  |ice nodes you wi|
73 68 0a 20 20 20 20 23  20 74 6f 20 75 73 65 20  |sh.    # to use |
77 69 74 68 20 4c 56 4d  32 2e 0a 20 20 20 20 73  |with LVM2..    s|
63 61 6e 20 3d 20 5b 20  22 2f 78 22 2c 0a 20 20  |can = [ "/x",.  |
20 20 20 20 20 20 20 20  20 20 20 22              | "|
...

Reported-by: dongmao zhang <dmzhang suse com>
2013-02-04 19:01:10 +01:00
Peter Rajnoha
6fc596ca90 dmeventd: close dmeventd FIFO FDs on exec (add FD_CLOEXEC). 2013-01-15 14:59:54 +01:00
Zdenek Kabelac
6f9e26f5c0 thin: dmeventd fix memleak on error path
Some error paths on _umount have leaked bitset.
2012-12-15 17:23:27 +01:00
Zdenek Kabelac
97f8454ecc libdm: deactivate failed node in preload
If the resume of preloaded node fails, do not leave such
node in the table - since it may not be easy to detach such
node later when the node is i.e. internal.

i.e. failing activation of the thin pool with mismatching
chunk size may leave -tpool device in the table, which
could have been then removed only by dmsetup command.
2012-12-02 17:59:40 +01:00
Peter Rajnoha
4891a735d3 udev: recognize DM_DISABLE_UDEV environment variable
Setting this environment variable will cause a full fallback
to old direct node and symlink management in libdevmapper and lvm2.

It means:

 - disabling udev synchronization
   (--noudevsync in dmsetup and --noudevsync + activation/udev_sync=0
    lvm2 config)
 - disabling dm and any subsystem related udev rules
   (--noudevrules in dmsetup and activation/udev_rules=0 lvm2 config)
 - management of nodes/symlinks under /dev directly by libdevmapper/lvm2
   (--verifyudev in dmsetup and activation/verify_udev_operations=1
    lvm2 config)
 - not obtaining any device list from udev database
   (devices/obtain_device_list_from_udev=0 lvm2 config)

Note: we could set all of these before - there's no functional change!
However the DM_DISABLE_UDEV environment variable is a nice shortcut
to make it easier for libdevmapper users so that one can switch off all
of the udev management off at one go directly on the command line,
without a need to modify any source or add any extra switches.
2012-11-29 14:03:48 +01:00
Peter Rajnoha
291909ecaf WHATS_NEW: latest changes under libdm 1.02.78 2012-10-25 16:29:35 +02:00
Peter Rajnoha
a820a68619 udev_sync: cookie_set=1 on each dm_task_set_cookie call
cookie_set variable found in the struct dm_task should be always
set to 1 after dm_task_set_cookie_call, even if udev_sync is disabled
as the cookie itself carries synchronization informations *as well as*
extra flags to control other aspects of udev support.

For example, one could disable the synchronization itself, but still
direct the libdm code to disable library fallback via
DM_UDEV_DISABLE_LIBRARY_FALLBACK flag. These extra flags still need
to be carried out!

A concrete example:
  $ dmsetup create test --table "0 1 zero" --noudevsync

This disables synchronization with udev. As the --verifyudev option is
not used, we don't want to do any corrections. In other words, we
need DM_UDEV_DISABLE_LIBRARY_FALLBACK flag to be used. However,
with --noudevsync this was not the case - the flag was ignored!

This patch fixes the case when noudevsync is used but there are still
some extra flags passed within the cookie flag part. The synchronization
part of the cookie stays zero (which is ok as dm_udev_wait call on such a
cookie is simply a NOOP).
2012-10-23 13:23:35 +02:00
Alasdair G Kergon
ea6a8078b4 release: prepare for release 2012-10-15 15:19:32 +01:00
Zdenek Kabelac
3972bd98fb thin: add support to unmount volumes
Reset counter after thin pool resize failure.

If the pool goes above threshold, support unmounting
of all thin volumes if the lvextend fails to avoid
overfilling of the pool.
2012-10-14 23:19:20 +02:00
Peter Rajnoha
3af43af493 WHATS_NEW: update 2012-10-10 17:36:37 +02:00
Zdenek Kabelac
1946a45329 libdm: reset delay flag for devs used by thin
Patch clears the flag if thin pool is stacked over mirror.

Since thin pool could be used to stack device over mirrors,
it needs resume properly i.e. mirrors with corelog which are otherwise
unconditionally skipped (for pvmove functionality).
2012-10-03 15:04:41 +02:00
Peter Rajnoha
847e2856a2 config: require dm_config_create_value for dm_config_node's value
If we were defining a section (which is a node without a value) and
the value was created automatically on dm_config_create_node call,
we were wasting resources as the next step after creating the config
node itself was assigning NULL for the node's value.

The dm_config_node_create + dm_config_create_value sequence should be
used instead for settings and dm_config_node_create alone for sections.

The majority of the code already used the correct sequence. Though
with dm_config_node_create fn creating the value as well, the pool
memory was being trashed this way.

This patch removes the node value initialization on dm_config_create_node
fn call and keeps it for the direct dm_config_create_value fn call.
2012-08-27 14:33:54 +02:00
Zdenek Kabelac
b1640df5e6 dmsetup: check if new_name is non NULL 2012-08-23 14:37:18 +02:00
Zdenek Kabelac
7e318dad42 dmsetup: fix memleak in _get_split_name
Free allocated buffer in _get_split_name error path.
2012-08-23 14:36:10 +02:00
Alasdair G Kergon
701b4a8363 thin: use discards as plural rather than singular
Global change from --discard to --discards, as that feels more natural.
2012-08-07 21:24:41 +01:00
Alasdair G Kergon
df452b47a1 release: update version/WHATS_NEW 2012-08-07 20:41:45 +01:00
Alasdair G Kergon
25ae0b39b7 dmsetup: allow --noflush with status/wait for thin
Allow --noflush with dmsetup status and wait (for thin target 1.3.0 /
ioctl 4.23.0).
2012-07-27 20:03:07 +01:00
Peter Rajnoha
5e36b86c46 config: fix one-node dumpconfig, add dm_config_write_one_node
A regression introduced in 2.02.89 (11e520256b)
caused the lvm dumpconfig <node> to print out
the node as well as its subsequent siblings.
The information about "only_one" mode got lost.

Before this patch (just an example node):
  # lvm dumpconfig global/use_lvmetad
  use_lvmetad=1
  thin_check_executable="/usr/sbin/thin_check"
  thin_check_options="-q"
  (...all nodes to the end of the section)

With this patch applied:
   # lvm dumpconfig global/use_lvmetad
   use_lvmetad=1
2012-07-20 15:53:04 +02:00
Zdenek Kabelac
c4db22bd4f libdm: support reserve and release metadata snap msg
Add support for new message types for thinp target 1.1
2012-07-18 14:34:19 +02:00
Zdenek Kabelac
dcd4afc716 libdm: add support for external origin and discard 2012-07-18 14:33:37 +02:00
Peter Rajnoha
e6f8d86409 udev: udev rules cleanup
Remove executable path detection in udev rules and use sbindir that
is configured, but still provide the original functionality by means
of 'configure --enable-udev-rule-exec-detection'.

Normally, the exec path for the tools called in udev rules should
not differ from the sbindir used, however, there are cases this is
necessary. For example different environments could be assembled
in a way that these path differ for some reason (distribution installer,
initrd ...).

This functionality is kept for compatibility only. Any environment
moving the binaries around and using different paths should be fixed
eventually!
2012-06-27 12:11:56 +02:00
Peter Rajnoha
9a96f930a7 configure: run directory configuration cleanup
There were several hard-coded values for run directory around the code.
Also, some tools are DM specific only, others are LVM specific and there
was no distinction made here before. With this patch applied, we have
this cleaned up a bit (subsystem in brackets, defaults in parentheses):

          [common] configurable PID_DIR     (/var/run)

 lvm      [lvm]    configurable RUN_DIR     (/var/run/lvm)
                   configurable locking dir (/var/lock/lvm)

 clvmd    [lvm]    configurable pid file    (PID_DIR/clvmd.pid)
                   socket                   (RUN_DIR/clvmd.sock)

 lvmetad  [lvm]    configurable pid file    (PID_DIR/lvmetad.pid)
                   socket                   (RUN_DIR/lvmetad.socket)

 dm       [dm]     configurable DM_RUN_DIR  (/var/run)

 cmirrord [dm]     configurable pid file    (PID_DIR/cmirrord.pid)

 dmeventd [dm]     configurable pid file    (PID_DIR/dmeventd.pid)
                   server fifo              (DM_RUN_DIR/dmeventd-server)
                   client fifo              (DM_RUN_DIR/dmeventd-client)

The changes briefly:
  - added configure --with-default-pid-dir
  - added configure --with-default-dm-run-dir
  - added configure --with-lvmetad-pidfile
  - by default, using one common pid directory for everything
    (only lvmetad was not following this before)
2012-06-27 12:11:47 +02:00
Peter Rajnoha
e77803edc9 systemd: Add Documentation references
These documentation references show up in "systemctl status" output.
2012-06-20 14:23:50 +02:00
Alasdair G Kergon
05fb515863 veritysetup: Remove code as now in cryptsetup.
The veritysetup code has moved to the cryptsetup package.
  http://code.google.com/p/cryptsetup/
2012-06-11 16:12:20 +01:00
Alasdair G Kergon
d41ad502b8 release: post-release update version 2012-06-09 00:44:01 +01:00
Alasdair G Kergon
389498764a WHATS_NEW_DM: Update for release. 2012-06-08 22:13:33 +01:00
Alasdair G Kergon
64a3ac8f51 Upstream source repo move to fedorahosted.org git.
Change version number suffix from -cvs to -git.
2012-06-06 13:26:46 +01:00
Peter Rajnoha
06738cac05 Remove unsupported udev_get_dev_path libudev call used for checking udev dir.
With latest changes in the udev, some deprecated functions were removed
from libudev amongst which there was the "udev_get_dev_path" function
we used to compare a device directory used in udev and directore set in
libdevmapper. The "/dev" is hardcoded in udev now (udev version >= 183).

Amongst other changes and from packager's point of view, it's also
important to note that the libudev development library ("libudev-devel")
could now be a part of the systemd development library ("systemd-devel")
because of the udev + systemd merge.
2012-05-29 08:09:10 +00:00
Alasdair Kergon
f1aabd5c60 Set delay_resume_if_new on deptree snapshot origin.
(Must avoid activating snapshot origin more than once concurrently.)
2012-05-15 21:27:24 +00:00
Alasdair Kergon
fccc6ea295 Log value chosen in _find_config_bool like other variable types do. 2012-05-08 14:31:44 +00:00
Zdenek Kabelac
d6f894edf8 Synchronize with self-destruction of dmeventd
In some occasional case dmevent restart was experiencing problems
with obtaining pid lockfile. So this patch tries to send several more kill
message until daemon kills itself so there is would reponse.
With this small loop the restart seems to work reliable,
although the loopsize and usleep are just randomly picked for now.
2012-04-24 12:25:12 +00:00
Peter Rajnoha
d13f356bf5 Also rename DevNos header to DevNosUsed in dmsetup info -c output. 2012-04-24 08:24:36 +00:00
Peter Rajnoha
0be6c87a56 Rename (Blk)DevNames header to (Blk)DevNamesUsed in dmsetup info -c output.
Just to make it clearer since there is the "dmsetup info -c -o blkdevname"
as well that shows the "block device name for this mapping", having a
"BlkDevName" header on output.

It's a bit confusing then if the "dmsetup info -c -o devs_used,blkdevs_used"
is named with a plural "DevNames"/"BlkDevNames" but at the same time having
a totally different meaning than the singular form "BlkDevName".

  DevNames --> DevNamesUsed
  BlkDevNames --> BlkDevNamesUsed

...makes it much more comprehensible.
2012-04-24 08:00:55 +00:00
Alasdair Kergon
3d962ed68f First veritysetup version using configure --with-veritysetup. 2012-03-24 01:59:59 +00:00
Zdenek Kabelac
516b79299a Fix check for passed in path for dmeventd startup
Check passed in executable path for dmeventd instead of predefined
compiled in path which is not the thing to be executed.
2012-03-20 17:38:47 +00:00
Peter Rajnoha
08e846e3d9 Remove dmeventd fifos on exit if they are not managed by systemd. 2012-03-15 08:45:55 +00:00
Peter Rajnoha
93945bb616 Use SD_ACTIVATION env. var. in systemd units to better detect systemd in use.
LISTEN_PID and LISTEN_FDS environment variables are defined only during systemd
"start" action. But we still need to know whether we're activated during
"reload" action as well - we use the reload action to call "dmeventd -R"/"lvmetad -R"
for statefull daemon restart. We can't use normal "restart" as that is simply
composed of "stop" and "start" and we would lose any state the daemon has.
2012-03-14 15:51:51 +00:00
Peter Rajnoha
c02af0773f Do not run a new dmeventd instance on restart if there's no existing one. 2012-03-14 11:16:00 +00:00
Zdenek Kabelac
65cfc5d16d We need longer window for checking read from fifo.
Seems like some dmeventd startups are taking more time then expected,
so make the time window longer here.
2012-03-12 14:46:53 +00:00
Alasdair Kergon
a17ac481ab post-release 2012-03-06 04:47:37 +00:00
Alasdair Kergon
ce05af1d32 pre-release 2012-03-06 02:50:40 +00:00
Peter Rajnoha
ba428469e6 Check for multiple mangled names in auto mangling mode.
Auto mode can't deal with multiple mangled names. We can do that while working
in hex mode, but in auto mode, this would lead to device name ambiguity.
2012-03-05 12:48:12 +00:00
Peter Rajnoha
4961c3b4af Fix dm_task_get_name_unmangled to not unmangle already unmangled name.
In 'auto' and 'hex' mode, these names are already unmangled on ioctl return.
There's no point on trying to do that once again (actually it's a bug!).
2012-03-05 12:45:43 +00:00
Peter Rajnoha
921a46446d Check whether device names are properly mangled on ioctl return.
Be more strict when unmangling names on ioctl return - require the name to be
properly mangled in 'auto' and 'hex' mode. There really should not be any
blacklisted character since the names should be renamed already (by means of
renaming it directly or running 'dmsetup mangle' for automatic rename).
2012-03-05 12:43:03 +00:00
Zdenek Kabelac
d18c70b4df Validate udev structures
Avoid using NULL pointers from udev. It seems like some older versions of udev
were improperly returning NULL in some case, so do not silently break here,
and give at least a warning to the user.
2012-03-04 17:40:59 +00:00
Alasdair Kergon
37160ef249 post-release 2012-03-03 02:08:37 +00:00
Alasdair Kergon
02b351ad95 pre-release 2012-03-03 01:00:49 +00:00
Zdenek Kabelac
0438b15353 List _thread_registry missed mutex
Operation on _thread_registry needs to be covered by mutex.
Cosmetic move a die code after free for valgind short leak list.
2012-03-02 22:57:25 +00:00
Zdenek Kabelac
7e35dfff3d Added dm_tree_node_set_callback() for preload and deactivation hooks
Run users hook after preload for the node is finished,
or after the node has been deactivated.
2012-03-02 17:31:21 +00:00
Zdenek Kabelac
6a5706a3a5 Remove support for TRIM message
It's been unsupporte for now - and it's not going to be
implemented for thin pool kernel driver - so dropping
appearence of TRIM from libdm and lvm.
2012-03-02 13:26:08 +00:00
Zdenek Kabelac
96b93199a0 Improve logging
Use %m for strerror.
Switch to use 0 for fail return code.
2012-03-01 22:06:18 +00:00
Zdenek Kabelac
d2ebc1dfa0 Add some more pointer validation
Ensure _display_name() and _add_dep() would not deref NULL names.
Switch to use internal dm_basename().
2012-03-01 21:56:44 +00:00
Zdenek Kabelac
521ddeaecc Check for version string buffer
Since lvm seems to call driver_version(NULL, 0)  this would lead
to crash. Though the combination of the code is probably very hard to hit.
If the user doesn't supply version buffer, just skip printing to buffer.
2012-03-01 10:07:38 +00:00
Zdenek Kabelac
ce1c28af19 Log fail of pthread_join
Syslog error outside of mutex section.
2012-03-01 09:50:04 +00:00
Alasdair Kergon
ebf5552754 Fix empty string warning logic in _find_config_str. (1.02.68)
pvcreate gives
WARNING: Ignoring unsupported value for metadata/pvmetadataignore.

It was warning if there is no config file entry instead of only if the node
exists but is empty.
2012-02-28 17:46:47 +00:00
Peter Rajnoha
25b25bd1a2 Fix dm_task_set_name to properly resolve path to dm name.
Wrong variable was checked in _dm_task_set_name_from_path.
2012-02-28 08:36:51 +00:00
Zdenek Kabelac
b3d10d7bf1 Introduce dm_strncpy
Should be faster then strncpy - since we could avoid clearing 4KB pages
with each strncpy(...,PATH_MAX).
Also it's easy to check whether string fit - and eventually avoid
to continue working we incomplete string.
2012-02-23 22:45:43 +00:00
Alasdair Kergon
1a4b6136be post-release 2012-02-23 18:26:28 +00:00
Alasdair Kergon
f9fc7d8da4 pre-release 2012-02-23 18:22:09 +00:00
Zdenek Kabelac
f72b184e3e Limit number of mem allocs and copies
If we have good enough glibc to return number of needed chars, do not
loop try to reach good size, but use this size directly for allocation,
saving also last strdup.

Since now we start with 16 bytes - skip buffer realloc for shorter string.
2012-02-23 18:05:12 +00:00
Alasdair Kergon
971248911b post-release 2012-02-20 21:11:06 +00:00
Alasdair Kergon
815aa3555f pre-release 2012-02-20 19:38:19 +00:00
Peter Rajnoha
36c90588fc Switch to using built-in blkid in 13-dm-disk.rules.
Available in udev since version 176.
2012-02-16 14:39:02 +00:00
Peter Rajnoha
9a0cf1ad84 Add watch rule to 13-dm-disk.rules.
We don't have anything better yet...

The problems the watch rule caused when removing devices should be covered
now with the "retry remove" logic. It's also better to have this maintained
by us, rather than having this rule anywhere else without proper control.
2012-02-15 14:50:33 +00:00
Zdenek Kabelac
80202ecd98 Detect failing fifo
If the fifo died because of dmeventd restart - do not wait for 20s
in select  - it will not get better and return error immediately.
2012-02-15 13:56:47 +00:00
Peter Rajnoha
05bfdefdf8 Add DM_DEFAULT_NAME_MANGLING_MODE env. variable to override configured value.
Just in case of emergency when name mangling code causes any problems so
we can override the default value and switch off the mangling globally.
2012-02-15 12:23:15 +00:00
Peter Rajnoha
3eb23ab3d2 Replace any '\' char with '\\' in table specification on input.
Device-mapper in kernel uses '\' as escape character so it's better
to double it to avoid any confusion when using existing device names
with '\' in the table specification.

For example:

dmsetup create x --table "0 8 linear /dev/mapper/a\x20b 0"

should pass just fine now without a need to explicitly escape the '\' char
like this:

dmsetup create x --table "0 8 linear /dev/mapper/a\\x20b 0"
2012-02-15 12:17:34 +00:00
Peter Rajnoha
4491acea0b Add mangle command to dmsetup to provide renaming to correct mangled form. 2012-02-15 12:08:57 +00:00
Peter Rajnoha
d4aa0496fb Add 'mangled_name' and 'unmangled_name' fields to dmsetup info -c -o. 2012-02-15 12:06:17 +00:00
Peter Rajnoha
0f49ede3b1 Add --manglename option to dmsetup to select the name mangling mode. 2012-02-15 12:02:58 +00:00
Peter Rajnoha
bd364a70b5 Add dm_task_get_name_mangled/unmangled to libdevmapper.
dm_task_get_name_mangled will always return mangled form of the name while
the dm_task_get_name_unmangled will always return unmangled form of the name
irrespective of the global setting (dm_set/get_name_mangling_mode).

This is handy in situations where we need to detect whether the name is already
mangled or not. Also display functions make use of it.
2012-02-15 11:39:38 +00:00
Peter Rajnoha
55761e14af Mangle device name on dm_task_set_name/newname call if necessary.
If dm_task_set_name/newname is called, the name provided will be
automatically translated to correct encoded form with the hex enconding
so any character not on udev whitelist will be mangled with \xNN
format where NN is hex value of the character used.

By default, the name mangling mode used is the one set during
configure with the '--with-default-name-mangling' option.
2012-02-15 11:27:01 +00:00
Peter Rajnoha
53f3ebce92 Add configure --with-default-name-mangling.
This option configures the default name mangling mode used, one of:
AUTO, NONE and HEX.

The name mangling is primarily used to support udev character whitelist
(0-9, A-Z, a-z, #*-.:=@_) so any character that is not on udev whitelist
will get translated into an encoded form \xNN where NN is the hex value
of the character.
2012-02-15 11:17:57 +00:00
Zdenek Kabelac
5e4f234918 Make sure dereferenced words[0] and words[1] are defined 2012-02-13 14:17:04 +00:00
Zdenek Kabelac
e66b3e8e3b Ensure allocated device does not leak on error path
For unimplementd canonicalize_file_name set to NULL
2012-02-13 12:06:39 +00:00
Zdenek Kabelac
74b5744b4b Check for missing reply_uuid 2012-02-13 11:24:09 +00:00
Zdenek Kabelac
65d01ed981 Check for allocation failure 2012-02-13 11:18:45 +00:00
Zdenek Kabelac
daaea2ef94 Add few missing allocation failures tests 2012-02-13 11:13:44 +00:00
Zdenek Kabelac
820aa36192 Do not write to -1 buffer address
In case of zero bytes would be read from sysfs, it would store '\0' on
temp_buf[-1] address.

Simplify some buffer length calculation and use strcpy if we've just
checked string fits in give buffer.

Replace jump label error: with bad: commonly used in libdm.
2012-02-13 10:49:28 +00:00
Alasdair Kergon
0a182731e4 post-release 2012-02-13 00:23:21 +00:00
Alasdair Kergon
79b3966a34 pre-release 2012-02-12 23:02:52 +00:00
Zdenek Kabelac
8380b37529 Fix message check
Check pointer from strchr for NULL instead of crash later.
Badly formated message would have crash dmeventd otherwise.
2012-02-10 15:17:52 +00:00
Zdenek Kabelac
4d95ccc696 Check for deps pointer before dererence
As _deps() call may return NULL - check for it.
2012-02-10 14:48:28 +00:00
Zdenek Kabelac
3b5834d78b Add validation of name and uuid
Do not accept NULL pointers.
2012-02-10 14:42:28 +00:00
Zdenek Kabelac
2c711a2502 Do not crash for NULL sort_key
Guard against NULL pointer for sort_key and let it behave like an empty
string would have been passed in (i.e. no key).
2012-02-10 14:00:07 +00:00
Zdenek Kabelac
36ddbdbbe2 Return error for failing allocation
Fix case, where final strdup would have failed and it would miss to return
failure for this case and return success and NULL pointer.
2012-02-10 13:56:19 +00:00
Zdenek Kabelac
c046a59e7f Add test for failing allocation
Avoid memcpy to NULL if realloc fails.
2012-02-10 13:52:05 +00:00
Zdenek Kabelac
511a5f3ad8 Add test for memory allocation failures
Replace asserts with test for failing memory allocation.
Add at least stack traces.
Index counter starts from 1 (0 reserved for error), so replacing fingerprint.
2012-02-10 13:49:29 +00:00
Zdenek Kabelac
d707e133d3 Use dm_asprintf to simplify code 2012-02-08 12:59:19 +00:00
Zdenek Kabelac
ebc9abf6c0 Set all parameters to 0
Since the function dm_get_next_target() returns NULL as 'next' pointer
so it's not a 'real' error - set 0 to all parameters when NULL is
returned because of missing head.

i.e. one of use case::
do {
	next = dm_get_next_target(dmt, next, &start, &length,
				  &target_type, &params);
	size += length;
} while (next);
2012-02-08 11:25:09 +00:00
Zdenek Kabelac
b6e97cea2c Fix fd resource leak in error path
Use 'goto bad' to cleanup fd on error path.
2012-02-08 11:07:17 +00:00
Zdenek Kabelac
5dfd775384 Ensure strncpy() function always ends with '\0'
Since last character needs to be \0 for string,
pass buffer size smaller by 1 byte.
2012-02-08 11:05:04 +00:00
Alasdair Kergon
2a57a934bb post-release 2012-02-01 18:46:57 +00:00
Alasdair Kergon
c8250560cd pre-release 2012-02-01 15:17:04 +00:00
Alasdair Kergon
91c631c558 post-release 2012-01-27 01:23:40 +00:00
Alasdair Kergon
a1991f101d pre-release 2012-01-26 14:02:42 +00:00
Alasdair Kergon
b475be8d77 pre-release 2012-01-26 10:11:30 +00:00
Zdenek Kabelac
fc5c61df97 Ensure whole info is initialised
Since _create_dm_tree_node is copying whole structure,
make sure all members are initialized.
2012-01-25 21:50:50 +00:00
Alasdair Kergon
8a35706cb1 Add dmsetup 'wipe_table' to replace table with one that uses error target. 2012-01-18 18:52:02 +00:00
Peter Rajnoha
e33fd978a8 Support different device name types on output of dmsetup deps, ls and info -c command.
Add 'blkdevname' and 'blkdevs_used' field to dmsetup info -c -o.
Add 'blkdevname' option to dmsetup ls --tree to see block device names.
Add '-o options' to dmsetup deps and ls to select device name type on output.
2012-01-11 12:46:19 +00:00
Peter Rajnoha
17c3e42b21 Add dm_device_get_name to get map name or block device name for given devno.
This is accomplished by reading associated sysfs information. For a dm device,
this is /sys/dev/block/major:minor/dm/name (supported in kernel version >= 2.6.29,
for older kernels, the behaviour is the same as for non-dm devices).

For a non-dm device, this is a readlink on /sys/dev/block/major:minor, e.g.
  /sys/dev/block/253:0 --> ../../devices/virtual/block/dm-0.
The last component of the path is a proper kernel name (block device name).

One can request to read only kernel names by setting the 'prefer_kernel_name'
argument if needed.
2012-01-11 12:34:44 +00:00
Alasdair Kergon
2e5ff5d11c Add dm_uuid_prefix/dm_set_uuid_prefix for non-lvm users to override hard-coded
LVM- prefix.

Try harder not to leave stray empty devices around (locally or remotely) when
reverting changes after failures while there are inactive tables.
2012-01-10 02:03:31 +00:00
Zdenek Kabelac
e49622ef17 Improve readahead in dmsetup man page 2012-01-09 12:28:47 +00:00
Zdenek Kabelac
044abcf91b Use sysfs to set/get of read-ahead
If we know major:minor number of device (which is known after resume) we will
try to use  sysfs to set/get read ahead parameters of device.
This avoid potential problem of blocking commands like 'dmsetup info' awaiting
for device being usable for open/close - i.e. overfilled thin pool may block
such command.
2012-01-09 12:26:14 +00:00
Zdenek Kabelac
99a150fc26 Add dm_config_find_str_allow_empty
Support empty string values.
2011-12-21 12:47:44 +00:00
Peter Rajnoha
0644371f09 Fix lvm2-monitor init script to use normalized output when using vgs. 2011-12-07 12:29:41 +00:00
Zdenek Kabelac
5392675f4c Check target type name for DM_MAX_TYPE_NAME length
Avoid creation of target type name when it's longer then
DM_MAX_TYPE_NAME (noticed by static analyzer where the
sp.target_type might be missing '\0' at the end.)

Before patch:

$> dmsetup create long
0 1000 looooooooooooooooooooooooooong
^D
device-mapper: reload ioctl failed: Invalid argument

After patch:

$> dmsetup create xxx
0 1000 looooooooooooooooooooooooooong
Target type name looooooooooooooooooooooooooong is too long.
Command failed
2011-11-18 19:34:02 +00:00
Alasdair Kergon
fb7817fe7c Include a copy of kernel DM documentation in doc/kernel 2011-11-15 13:54:20 +00:00
Zdenek Kabelac
5e62f7038f Update dmsetup man page
Use standard manpage style.
Keep options and commands in alphabetic order.
Added at least a very simply info about some other targets.
TODO: documenting targest needs far more work...
2011-11-12 22:48:44 +00:00