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Commit Graph

1056 Commits

Author SHA1 Message Date
Peter Rajnoha
0a2cadf6b8 libdm: report: consolidate use of string list selection structures 2015-11-18 10:54:09 +01:00
Zdenek Kabelac
83661c8f7f cleanup: use embeded list
Skip pointer and put list into selection_str_list.
2015-11-17 19:01:25 +01:00
Zdenek Kabelac
121341e52c cleanup: unify NULL custom check
Unify testing of NULL custom pointer.
Resolve 'factor' only in required if() branch.
2015-11-17 19:01:25 +01:00
Zdenek Kabelac
51dfba002b libdm: update error message
Correcting error message.
2015-11-17 19:01:25 +01:00
David Teigland
931fede81b hash: change name of new lookup function 2015-11-17 11:59:44 -06:00
David Teigland
485d2ca945 lvmetad: different style for hash functions
In lookup, return a count of entries with the
same key rather than the value from a second
entry with the same key.

Using some slightly different names.
2015-11-17 10:27:16 -06:00
David Teigland
920a281994 hash: add comment about multiple values 2015-11-16 11:02:25 -06:00
Zdenek Kabelac
b6a45963e3 libdm: fix check of pointer
Ahhh being blind here - wanted to check the pointer before dereference
not a dereferenced one.
2015-11-16 13:10:24 +01:00
Zdenek Kabelac
2a2487f02f libdm: better error reporting from dm_split_lvm_name
Report errors from all error paths correctly.
Validate passed args before dereferencing them.
2015-11-16 13:09:53 +01:00
Zdenek Kabelac
96d73dc6ea libdm: check for passed custom time value
Coverity reports custom should be checked before derefernce.
2015-11-16 01:16:11 +01:00
Zdenek Kabelac
d4288c9bdf libdm: check for null from pool strdup
Unlikely to happen, but Coverity shown we may have possible
derefer NULL pointer.
2015-11-16 01:16:09 +01:00
Zdenek Kabelac
422c7474ca libdm: check if passed return pointer is not NULL
Coverity: before storing return value, check passed space will
not dereference NULL pointer.
2015-11-16 01:15:04 +01:00
David Teigland
d9295410e9 lvmetad: change the new hash to take data len
If the data len is passed into the hash table
and saved there, then the hash table internals
do not need to assume that the data value is
a string at any point.
2015-11-13 16:54:22 -06:00
David Teigland
46193f4a59 lvmetad: handle duplicate VG names
New hash table functions are added that allow for
multiple entries with the same key.  Use of the
vgname_to_vgid hash table is converted to these
new functions since there are multiple entries
in vgname_to_vgid that have the same key (vgname).

When multiple VGs with the same name exist, commands
that reference only a VG name will fail saying the
VG could not be found (that error message could be
improved.)  Any command that works with the select
option can access one of the VGs with -S vg_uuid=X.
vgrename is a special case that allows the first VG
name arg to be replaced by a uuid, which also works.

(The existing hash table implementation is not well
suited for handling this case, but it works ok with
the new extensions.  Changing lvmetad to use its own
custom hash tables may be preferable at some point.)
2015-11-13 14:56:35 -06:00
Zdenek Kabelac
d74e1291cd libdm: put in secure check
Coverity complains about NULL deref - while this cannot currently
happen, put in secure INTERNAL_ERROR.
2015-11-13 11:17:05 +01:00
Zdenek Kabelac
6d0db97163 libdm: reorder error path
Coverity noticed recent fix of an error path missed to
release 'dmt' - reoder code to ensure 'dmt' is released.
2015-11-10 21:41:47 +01:00
Zdenek Kabelac
fb59847a0f libdm: replace assign with increment
Coverity didn't liked assign with && expression, so use trick.
It does not complain against this prefix incremenent operation.
2015-11-09 22:51:48 +01:00
Zdenek Kabelac
846adadbcc cleanup: use code in place
Pass const strings to printf(),
and use  struct names directly instead of creating unused vars on stack.
2015-11-09 10:22:52 +01:00
Zdenek Kabelac
3cadc1c87e libdm: add test for dm_task_get_message_response()
Coverity notices dm_task_get_message_response() result should be
checked for NULL which should not be passed to dm_pool_strdup().
2015-11-09 10:19:19 +01:00
Zdenek Kabelac
84303dc17a libdm: exlicitly check for NULL
Coverity: another explict check for NULL, where coverity fails to
see it.
2015-11-09 10:19:19 +01:00
Zdenek Kabelac
f6c140e200 libdm: ensure vars are initialized
Coverity found potential error path, where code could
have used some unset variables.
2015-11-09 10:19:19 +01:00
Zdenek Kabelac
b1c4017743 libdm: add missing error path check
Coverity: do not continue with section cloning when root node
would a NULL.
2015-11-09 10:19:19 +01:00
Zdenek Kabelac
428ca9b120 libdm: enable no_flush for driver version > 11
It appears the driver version 11 has troubles with usage of no_flush
So require at least version 12.
2015-10-26 07:37:59 +01:00
Zdenek Kabelac
9ef820a2a5 libdm: dm_tree_node_size_changed recognizes reduction
Add more functionality to size_changed function.
While 'existing' API only detected  0 for
unchanged,  and !0 for changed,
new improved API will also detected if the
size has only went bigger - or there was
size reduction.

Function work for the whole dm-tree - so
no change is size is always 0.
only size extension  1.
and if some size reduction is there - returns -1.

This result can be used for better evaluation
whether we need to flush before suspend.
2015-10-25 21:05:15 +01:00
Zdenek Kabelac
39cffa4e9b cleanup: declare vars before code 2015-10-22 22:46:10 +02:00
Zdenek Kabelac
09a62cca0c libdm: add dm_hold_control_dev
Support hold of control device open.
Useful for daemons so the control device is not frequently reopenned.
2015-10-22 22:27:31 +02:00
Peter Rajnoha
c3bfe07f2a config: add report/compact_output_cols to control which columns to compact in report output
The new report/compact_output_cols setting has exactly the same effect
as report/compact_output setting. The difference is that with the new
setting it's possible to define which cols should be compacted exactly
in contrast to all cols in case of report/compact_output.

In case both compact_output and compact_output_cols is enabled/set,
the compact_output prevails.

For example:

$ lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=0
compact_output_cols=""

$ lvs vg
  LV    VG   Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lvol0 vg   -wi-a----- 4.00m

---

$ lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=0
compact_output_cols="data_percent,metadata_percent,pool_lv,move_pv,origin"

$ lvs vg
  LV    VG   Attr       LSize Log Cpy%Sync Convert
  lvol0 vg   -wi-a----- 4.00m

---

$ lvmconfig --type full report/compact_output report/compact_output_cols
compact_output=1
compact_output_cols="data_percent,metadata_percent,pool_lv,move_pv,origin"

$ lvs vg
  LV    VG   Attr       LSize
  lvol0 vg   -wi-a----- 4.00m
2015-10-16 17:05:54 +02:00
Peter Rajnoha
508f0f5a21 libdm: add dm_report_compact_given_fields
dm_report_compact_given_fields is the same as dm_report_compact_fields,
but it processes only given fields, not all the fields in the report
like dm_report_compact_field does.
2015-10-16 17:05:54 +02:00
Zdenek Kabelac
362558cd66 cleanup: typo in comment 2015-10-13 15:22:58 +02:00
Zdenek Kabelac
5695c6aca6 libdm: enforce writethrough mode for cleaner
With "cleaner" policy always use 'writethrough' mode.
2015-10-13 14:35:48 +02:00
Alasdair G Kergon
0173c260d8 libdm: Move status fns from deptree to targets.
libdm-deptree is only for functions working with dm tree nodes.
2015-09-28 20:28:31 +01:00
Heinz Mauelshagen
1945a0f504 libdm: fix bogus macro causing false parameter count 2015-09-24 14:22:52 +02:00
Heinz Mauelshagen
4e60e62444 raid: Fix raid target write_behind parameter.
Now uses correct "max_write_behind" instead of "writebehind".
(Includes some tidying up.)
2015-09-23 15:53:27 +01:00
Heinz Mauelshagen
96a6210198 libdm: Improve raid segment parameter handling. 2015-09-23 15:25:46 +01:00
Zdenek Kabelac
e0d915a873 libdm: parse Overflow string from snapshot status
This is likely to be a new 'info' provided by kernel
snapshot target.
For now just parse this string.
2015-09-18 17:45:45 +02:00
Peter Rajnoha
6c0b4a2769 libdm: file: add proper checks for directory components in dm_create_dir
Also make error messages more consistent:

Before this patch:

(/run/lock exists and is not a directory)
$ pvs
  /run/lock/lvm: mkdir failed: Not a directory
  File-based locking initialisation failed.

(/run/lock/lvm exists and is not a directory)
$ pvs
  Directory "/run/lock/lvm" not found
  File-based locking initialisation failed.

With this patch applied:

(/run/lock exists and is not a directory)
$ pvs
  Existing path /run/lock is not a directory.
  Failed to create directory /run/lock/lvm.
  File-based locking initialisation failed

(/run/lock/lvm exists and is not a directory)
$ pvs
  Existing path /run/lock/lvm is not a directory.
  Failed to create directory /run/lock/lvm.
  File-based locking initialisation failed.
2015-09-17 14:29:51 +02:00
Peter Rajnoha
afdae26c71 libdm: dev_node: use lstat instead of stat while removing and renaming nodes
When using udev, the /dev/mapper entries are symlinks - fix the code
to count with this.

This patch also fixes the dmsetup mknodes and vgmknodes to properly
repair /dev/mapper content if it sees dangling symlink in /dev/mapper.
2015-09-17 13:37:15 +02:00
Peter Rajnoha
b5022102bb libdm: report: make it possible to use blank value as selection for string list report field
$ lvs -o name,tags vg
  LV    LV Tags
  lvol0
  lvol1 mytag

Before this patch:
$ lvs -o name,tags vg -S 'tags=""'
  Failed to parse string list value for selection field lv_tags.
  Selection syntax error at 'tags=""'.
  Use 'help' for selection to get more help.

(and the same for -S 'tags={}' and -S 'tags=[]')

With this patch applied:
$ lvs -o name,tags vg -S 'tags=""'
  LV    LV Tags
  lvol0

(and the same for -S 'tags={}' and -S 'tags=[]')
2015-09-17 10:19:15 +02:00
Alasdair G Kergon
a729b1aa29 pre-release 2015-09-15 13:17:50 +01:00
Zdenek Kabelac
c356991fa8 libdm: no validate for pool without messages
Avoid validation of free space in pool, when no messages are passed.

Patch a3c7e326c3 add new check for
pool overload - but this check should not be made if there are
no messages and transaction_id is still within 'bounds' (bigger by 1).
2015-09-14 20:18:54 +02:00
Bryn M. Reeves
d7f45ebca5 libdm: clean up stats local variable use 2015-09-07 20:14:53 +01:00
Bryn M. Reeves
daa94eb792 libdm: fix display of nsec suffixes in histogram strings 2015-09-07 20:14:53 +01:00
Bryn M. Reeves
5f990473e4 libdm: clean up _build_histogram_arg()
Split up _build_histogram_arg() into separate functions to allocate
and fill the histogram arg string and remove nested local variable
declarations from the parent function.
2015-09-07 19:30:03 +01:00
Bryn M. Reeves
4bc7a86f3a libdm: only free the first histogram explicitly (Coverity)
Coverity flags a user-after-free in _stats_histograms_destroy():

>>>     Calling "dm_pool_free" frees pointer "mem->chunk" which has
>>>     already been freed.

This should not be possible since the histograms are destroyed in
reverse order of allocation:

 203         for (n = _nr_areas_region(region) - 1; n; n--)
 204                 if (region->counters[n].histogram)
 205                         dm_pool_free(mem, region->counters[n].histogram);

It appears that Coverity is unaware that pool->chunk is updated
during the call to dm_pool_free() and valgrind flags no errors in
this function when called with multiple allocated histograms.

Since there is no actual need to free the histograms individually
in this way simplify the code and just free the first allocated
object (which will also free all later allocated histograms in a
single call).
2015-09-07 17:53:56 +01:00
Bryn M. Reeves
ab1b54c3e3 libdm: fix dm_stats leak in dm_stats_create()
The histogram changes adds a new error path to dm_stats_create().
Make sure that the dm_stats handle is properly destroyed if we fail
to create the histogram pool and check for failures setting the
program_id.
2015-09-07 12:08:34 +01:00
Bryn M. Reeves
0f5933ecc1 libdm: handle pool errors in dm_histogram_to_string() 2015-09-07 12:01:20 +01:00
Bryn M. Reeves
e75b4bc2df libdm: check dm_pool_begin_object() return value. 2015-09-07 11:52:54 +01:00
Bryn M. Reeves
36b09fd147 libdm: add missing error handling in _stats_parse_histogram()
Since we are growing an object in the histogram pool the return
value of dm_pool_grow_object() must be checked and error paths need
to abandon the object before returning.
2015-09-07 11:44:53 +01:00
Alasdair G Kergon
fb12308416 style: Standardise some error paths. 2015-09-05 23:56:30 +01:00
Bryn M. Reeves
cdca2782d2 libdm: fix uninitialized variable warnings on older gcc
Older versions of gcc aren't able to track the assignments of
local variables as well as the latest versions leading to spurious
warnings like:

libdm-stats.c:2183: warning: "len" may be used uninitialized in this
function
libdm-stats.c:2177: warning: "minwidth" may be used uninitialized in
this function

Both of these variables are in fact assigned in all possible paths
through the function and later compilers do not produce these
warnings.

There's no reason to not initialize these variables though and
it makes the function slightly easier to follow.

Also fix one use of 'unsigned' for a nr_bins value.
2015-09-04 11:46:48 +01:00