[PATCH 0/5] V2 lvm2app & python bindings bug fixes

[PATCH 0/5] V2 lvm2app & python bindings bug fixes

[Tony Asleson]

This patch set should resolve the following issues:

* Handle signed properties better

I added another flag on the properties structure to indicate if the property is
signed and added a int64_t signed_integer to the union.  Updated python binding
to build the correct representation.  I didn't get any feedback on this
approach in the bz, not sure if another approach would work better.

ref. https://bugzilla.redhat.com/show_bug.cgi?id=838257


* Unable to retrieve specific properties:

Any property that internally was defined as a string list was broken, ended up
being a missing flag.

ref. https://bugzilla.redhat.com/show_bug.cgi?id=1139920

Would appreciate someone taking a peek at these changes.

V2: Re-word the commit headers to provide more context.

Thanks,
Tony

Tony Asleson (5):
  lvm2app: Add signed numerical property values
  python: Build correct python value for numerical property
  python: Check for NULL value before constructing string property
  lvm2app: Correct missing string properties
  Python: Improve lv property test coverage

 lib/properties/prop_common.h |  5 +++-
 lib/report/columns.h         |  8 +++----
 lib/report/properties.c      |  3 ++-
 lib/report/report.c          |  2 ++
 liblvm/lvm2app.h             |  4 +++-
 liblvm/lvm_misc.c            |  1 +
 liblvm/lvm_prop.c            |  2 +-
 python/liblvm.c              | 17 ++++++++++----
 test/api/python_lvm_unit.py  | 56 +++++++++++++++++++++++++++++++++++++++++---
 9 files changed, 83 insertions(+), 15 deletions(-)

-- 
1.8.2.1

[PATCH 1/5] lvm2app: Add signed numerical property values

[Tony Asleson]

Currently lvm2app properties have the following structure:

typedef struct lvm_property_value {
        uint32_t is_settable:1;
        uint32_t is_string:1;
        uint32_t is_integer:1;
        uint32_t is_valid:1;
        uint32_t padding:28;
        union {
                const char *string;
                uint64_t integer;
        } value;
} lvm_property_value_t;

which assumes that numerical values were in the range of 0 to 2**64-1.  However,
some of the properties were 'signed', like LV major/minor numbers and some
reserved values for properties that represent percentages.  Thus when the
values were retrieved they were in two's complement notation.  So for a -1
major number the API user would get a value of 18446744073709551615.  The
API user could cast the returned value to an int64_t to handle this, but that
requires the API developer to look at the source code and determine when it
should be done.

This change modifies the return property structure to:

typedef struct lvm_property_value {
        uint32_t is_settable:1;
        uint32_t is_string:1;
        uint32_t is_integer:1;
        uint32_t is_valid:1;
        uint32_t is_signed:1;
        uint32_t padding:27;
        union {
                const char *string;
                uint64_t integer;
                int64_t signed_integer;
        } value;
} lvm_property_value_t;

With this addition the API user can interrogate that the value is numerical,
(is_integer = 1) and subsequently check if it's signed (is_signed = 1) too.
If signed, then the API developer should use the union's signed_integer to
avoid casting.

This change maintains backwards compatibility as the structure size remains
unchanged and integer value remains unchanged.  Only the additional bit
taken from the pad is utilized.

Bugzilla reference:
https://bugzilla.redhat.com/show_bug.cgi?id=838257

Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
 lib/properties/prop_common.h | 5 ++++-
 lib/report/columns.h         | 8 ++++----
 lib/report/properties.c      | 3 ++-
 lib/report/report.c          | 2 ++
 liblvm/lvm2app.h             | 4 +++-
 liblvm/lvm_misc.c            | 1 +
 liblvm/lvm_prop.c            | 2 +-
 7 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/lib/properties/prop_common.h b/lib/properties/prop_common.h
index d7d01af..0b1678d 100644
--- a/lib/properties/prop_common.h
+++ b/lib/properties/prop_common.h
@@ -26,9 +26,11 @@ struct lvm_property_type {
 	unsigned is_settable:1;
 	unsigned is_string:1;
 	unsigned is_integer:1;
+	unsigned is_signed:1;
 	union {
 		const char *string;
 		uint64_t integer;
+		int64_t signed_integer;
 	} value;
 	int (*get) (const void *obj, struct lvm_property_type *prop);
 	int (*set) (void *obj, struct lvm_property_type *prop);
@@ -126,9 +128,10 @@ static int _ ## NAME ## _get (const void *obj, struct lvm_property_type *prop) \
 #define SIZ 4
 #define PCT 5
 #define STR_LIST 6
+#define SNUM 7              /* Signed Number */
 
 #define FIELD_MODIFIABLE 0x00000001
 #define FIELD(type, strct, field_type, head, field, width, fn, id, desc, settable) \
-	{ type, #id, settable, field_type == STR, ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
+	{ type, #id, settable, field_type == STR, ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
 
 #endif
diff --git a/lib/report/columns.h b/lib/report/columns.h
index cf84295..06282c5 100644
--- a/lib/report/columns.h
+++ b/lib/report/columns.h
@@ -56,8 +56,8 @@ FIELD(LVS, lv, STR, "Active", lvid, 6, lvactive, lv_active, "Active state of the
 FIELD(LVS, lv, BIN, "ActLocal", lvid, 10, lvactivelocally, lv_active_locally, "Set if the LV is active locally.", 0)
 FIELD(LVS, lv, BIN, "ActRemote", lvid, 10, lvactiveremotely, lv_active_remotely, "Set if the LV is active remotely.", 0)
 FIELD(LVS, lv, BIN, "ActExcl", lvid, 10, lvactiveexclusively, lv_active_exclusively, "Set if the LV is active exclusively.", 0)
-FIELD(LVS, lv, NUM, "Maj", major, 3, int32, lv_major, "Persistent major number or -1 if not persistent.", 0)
-FIELD(LVS, lv, NUM, "Min", minor, 3, int32, lv_minor, "Persistent minor number or -1 if not persistent.", 0)
+FIELD(LVS, lv, SNUM, "Maj", major, 3, int32, lv_major, "Persistent major number or -1 if not persistent.", 0)
+FIELD(LVS, lv, SNUM, "Min", minor, 3, int32, lv_minor, "Persistent minor number or -1 if not persistent.", 0)
 FIELD(LVS, lv, SIZ, "Rahead", lvid, 6, lvreadahead, lv_read_ahead, "Read ahead setting in current units.", 0)
 FIELD(LVS, lv, SIZ, "LSize", size, 5, size64, lv_size, "Size of LV in current units.", 0)
 FIELD(LVS, lv, SIZ, "MSize", lvid, 6, lvmetadatasize, lv_metadata_size, "For thin and cache pools, the size of the LV that holds the metadata.", 0)
@@ -88,8 +88,8 @@ FIELD(LVS, lv, STR, "Time", lvid, 26, lvtime, lv_time, "Creation time of the LV,
 FIELD(LVS, lv, STR, "Host", lvid, 10, lvhost, lv_host, "Creation host of the LV, if known.", 0)
 FIELD(LVS, lv, STR_LIST, "Modules", lvid, 7, modules, lv_modules, "Kernel device-mapper modules required for this LV.", 0)
 
-FIELD(LVSINFO, lv, NUM, "KMaj", lvid, 4, lvkmaj, lv_kernel_major, "Currently assigned major number or -1 if LV is not active.", 0)
-FIELD(LVSINFO, lv, NUM, "KMin", lvid, 4, lvkmin, lv_kernel_minor, "Currently assigned minor number or -1 if LV is not active.", 0)
+FIELD(LVSINFO, lv, SNUM, "KMaj", lvid, 4, lvkmaj, lv_kernel_major, "Currently assigned major number or -1 if LV is not active.", 0)
+FIELD(LVSINFO, lv, SNUM, "KMin", lvid, 4, lvkmin, lv_kernel_minor, "Currently assigned minor number or -1 if LV is not active.", 0)
 FIELD(LVSINFO, lv, SIZ, "KRahead", lvid, 7, lvkreadahead, lv_kernel_read_ahead, "Currently-in-use read ahead setting in current units.", 0)
 FIELD(LVSINFO, lv, STR, "LPerms", lvid, 8, lvpermissions, lv_permissions, "LV permissions.", 0)
 FIELD(LVSINFO, lv, BIN, "Suspended", lvid, 10, lvsuspended, lv_suspended, "Set if LV is suspended.", 0)
diff --git a/lib/report/properties.c b/lib/report/properties.c
index ea70690..b0a91a7 100644
--- a/lib/report/properties.c
+++ b/lib/report/properties.c
@@ -462,7 +462,7 @@ GET_PVSEG_NUM_PROPERTY_FN(pvseg_size, (SECTOR_SIZE * pvseg->len))
 
 struct lvm_property_type _properties[] = {
 #include "columns.h"
-	{ 0, "", 0, 0, 0, { .integer = 0 }, prop_not_implemented_get, prop_not_implemented_set },
+	{ 0, "", 0, 0, 0, 0, { .integer = 0 }, prop_not_implemented_get, prop_not_implemented_set },
 };
 
 #undef STR
@@ -471,6 +471,7 @@ struct lvm_property_type _properties[] = {
 #undef SIZ
 #undef PCT
 #undef STR_LIST
+#undef SNUM
 #undef FIELD
 
 int lvseg_get_property(const struct lv_segment *lvseg,
diff --git a/lib/report/report.c b/lib/report/report.c
index 500bf2b..a107669 100644
--- a/lib/report/report.c
+++ b/lib/report/report.c
@@ -2057,6 +2057,7 @@ static const struct dm_report_object_type _devtypes_report_types[] = {
 #define SIZ DM_REPORT_FIELD_TYPE_SIZE
 #define PCT DM_REPORT_FIELD_TYPE_PERCENT
 #define STR_LIST DM_REPORT_FIELD_TYPE_STRING_LIST
+#define SNUM DM_REPORT_FIELD_TYPE_NUMBER
 #define FIELD(type, strct, sorttype, head, field, width, func, id, desc, writeable) \
 	{type, sorttype, offsetof(type_ ## strct, field), width, \
 	 #id, head, &_ ## func ## _disp, desc},
@@ -2085,6 +2086,7 @@ static const struct dm_report_field_type _devtypes_fields[] = {
 #undef BIN
 #undef SIZ
 #undef STR_LIST
+#undef SNUM
 #undef FIELD
 
 void *report_init(struct cmd_context *cmd, const char *format, const char *keys,
diff --git a/liblvm/lvm2app.h b/liblvm/lvm2app.h
index 3692f9a..1a5bc08 100644
--- a/liblvm/lvm2app.h
+++ b/liblvm/lvm2app.h
@@ -231,10 +231,12 @@ typedef struct lvm_property_value {
 	uint32_t is_string:1;
 	uint32_t is_integer:1;
 	uint32_t is_valid:1;
-	uint32_t padding:28;
+	uint32_t is_signed:1;
+	uint32_t padding:27;
 	union {
 		const char *string;
 		uint64_t integer;
+		int64_t signed_integer;
 	} value;
 } lvm_property_value_t;
 
diff --git a/liblvm/lvm_misc.c b/liblvm/lvm_misc.c
index ff26cdf..431d354 100644
--- a/liblvm/lvm_misc.c
+++ b/liblvm/lvm_misc.c
@@ -88,6 +88,7 @@ struct lvm_property_value get_property(const pv_t pv, const vg_t vg,
 	v.is_settable = prop.is_settable;
 	v.is_string = prop.is_string;
 	v.is_integer = prop.is_integer;
+	v.is_signed = prop.is_signed;
 	if (v.is_string)
 		v.value.string = prop.value.string;
 	if (v.is_integer)
diff --git a/liblvm/lvm_prop.c b/liblvm/lvm_prop.c
index 79ed113..4ea868d 100644
--- a/liblvm/lvm_prop.c
+++ b/liblvm/lvm_prop.c
@@ -41,7 +41,7 @@ SET_PVCREATEPARAMS_NUM_PROPERTY_FN(zero, pvcp->zero)
 
 struct lvm_property_type _lib_properties[] = {
 #include "lvm_prop_fields.h"
-	{ 0, "", 0, 0, 0, { .integer = 0 }, prop_not_implemented_get,
+	{ 0, "", 0, 0, 0, 0, { .integer = 0 }, prop_not_implemented_get,
 			prop_not_implemented_set },
 };
 
-- 
1.8.2.1

[PATCH 2/5] python: Build correct python value for numerical property

[Tony Asleson]

With the lvm2app C API adding the ability to determine when a property is
signed we can then use this information to construct the correct representation
of the number for python which will maintain value and sign.  Previously, we
only represented the numbers in python as positive integers.

Python long type exceeds the range for unsigned and signed integers, we just
need to use the appropriate parsing code to build correctly.

Python part of the fix for:
https://bugzilla.redhat.com/show_bug.cgi?id=838257

Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
 python/liblvm.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/python/liblvm.c b/python/liblvm.c
index 6151745..f4a7a2d 100644
--- a/python/liblvm.c
+++ b/python/liblvm.c
@@ -870,10 +870,15 @@ static PyObject *get_property(struct lvm_property_value *prop)
 	if (!(pytuple = PyTuple_New(2)))
 		return NULL;
 
-	if (prop->is_integer)
-		PyTuple_SET_ITEM(pytuple, 0, Py_BuildValue("K", prop->value.integer));
-	else
+	if (prop->is_integer) {
+		if (prop->is_signed) {
+			PyTuple_SET_ITEM(pytuple, 0, Py_BuildValue("L", prop->value.signed_integer));
+		} else {
+			PyTuple_SET_ITEM(pytuple, 0, Py_BuildValue("K", prop->value.integer));
+		}
+	} else {
 		PyTuple_SET_ITEM(pytuple, 0, PYSTRTYPE_FROMSTRING(prop->value.string));
+	}
 
 	if (prop->is_settable)
 		setable = Py_True;
-- 
1.8.2.1

[PATCH 3/5] python: Check for NULL value before constructing string property

[Tony Asleson]

When retrieving a property value that is a string, if the character pointer in C
was NULL, we would segfault.  This change checks for non-null before creating a
python string representation.  In the case where the character pointer is NULL
we will return a python 'None' for the value.

Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
 python/liblvm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/python/liblvm.c b/python/liblvm.c
index f4a7a2d..089abb3 100644
--- a/python/liblvm.c
+++ b/python/liblvm.c
@@ -877,7 +877,11 @@ static PyObject *get_property(struct lvm_property_value *prop)
 			PyTuple_SET_ITEM(pytuple, 0, Py_BuildValue("K", prop->value.integer));
 		}
 	} else {
-		PyTuple_SET_ITEM(pytuple, 0, PYSTRTYPE_FROMSTRING(prop->value.string));
+		if ( prop->value.string ) {
+			PyTuple_SET_ITEM(pytuple, 0, PYSTRTYPE_FROMSTRING(prop->value.string));
+		} else {
+			PyTuple_SET_ITEM(pytuple, 0, Py_None);
+		}
 	}
 
 	if (prop->is_settable)
-- 
1.8.2.1

[PATCH 4/5] lvm2app: Correct missing string properties

[Tony Asleson]

Synopsis: STR_LIST needs to be treated as STR for properties.

For any lvm property that was internally 'typed' as a string list we were failing
to return a string in the property API.  This was due to the fact that for the
properties to work the value needs to either be evaulated as a string or a
number.  This change corrects the macro used to build the memory array of
structures so that the string bitfield is set as needed to ensure that the value
is a string.

https://bugzilla.redhat.com/show_bug.cgi?id=1139920

Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
 lib/properties/prop_common.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/properties/prop_common.h b/lib/properties/prop_common.h
index 0b1678d..9cc963a 100644
--- a/lib/properties/prop_common.h
+++ b/lib/properties/prop_common.h
@@ -132,6 +132,6 @@ static int _ ## NAME ## _get (const void *obj, struct lvm_property_type *prop) \
 
 #define FIELD_MODIFIABLE 0x00000001
 #define FIELD(type, strct, field_type, head, field, width, fn, id, desc, settable) \
-	{ type, #id, settable, field_type == STR, ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
+	{ type, #id, settable, (field_type == STR || field_type == STR_LIST), ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
 
 #endif
-- 
1.8.2.1

[PATCH 5/5] Python: Improve lv property test coverage

[Tony Asleson]

Improve the python unit test case to cover all of the properties of a LV and
the properties of a LV segment.

In addition we also add a 'tag' to the lv so that we can retrieve it
using the 'lv_tags' property to ensure that this works as expected.

Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
 test/api/python_lvm_unit.py | 56 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 53 insertions(+), 3 deletions(-)

diff --git a/test/api/python_lvm_unit.py b/test/api/python_lvm_unit.py
index e66ebda..6fc1963 100755
--- a/test/api/python_lvm_unit.py
+++ b/test/api/python_lvm_unit.py
@@ -21,7 +21,7 @@ import itertools
 import sys
 
 if sys.version_info[0] > 2:
-    long = int
+	long = int
 
 # Set of basic unit tests for the python bindings.
 #
@@ -309,7 +309,11 @@ class TestLvm(unittest.TestCase):
 	def _test_prop(self, prop_obj, prop, var_type, settable):
 		result = prop_obj.getProperty(prop)
 
-		self.assertEqual(type(result[0]), var_type)
+		#If we have no string value we can get a None type back
+		if result[0] is not None:
+			self.assertEqual(type(result[0]), var_type)
+		else:
+			self.assertTrue(str == var_type)
 		self.assertEqual(type(result[1]), bool)
 		self.assertTrue(result[1] == settable)
 
@@ -332,7 +336,53 @@ class TestLvm(unittest.TestCase):
 		lv_name = 'lv_test'
 		TestLvm._create_thin_lv(TestLvm._get_pv_device_names(), lv_name)
 		lv, vg = TestLvm._get_lv(None, lv_name)
-		self._test_prop(lv, 'seg_count', long, False)
+
+		lv_seg_properties = [
+			('chunk_size', long, False), ('devices', str, False),
+			('discards', str, False), ('region_size', long, False),
+			('segtype', str, False), ('seg_pe_ranges', str, False),
+			('seg_size', long, False), ('seg_size_pe', long, False),
+			('seg_start', long, False), ('seg_start_pe', long, False),
+			('seg_tags', str, False), ('stripes', long, False),
+			('stripe_size', long, False), ('thin_count', long, False),
+			('transaction_id', long, False), ('zero', long, False)]
+
+		lv_properties = [
+			('convert_lv', str, False), ('copy_percent', long, False),
+			('data_lv', str, False), ('lv_attr', str, False),
+			('lv_host', str, False), ('lv_kernel_major', long, False),
+			('lv_kernel_minor', long, False),
+			('lv_kernel_read_ahead', long, False),
+			('lv_major', long, False), ('lv_minor', long, False),
+			('lv_name', str, False), ('lv_path', str, False),
+			('lv_profile', str, False), ('lv_read_ahead', long, False),
+			('lv_size', long, False), ('lv_tags', str, False),
+			('lv_time', str, False), ('lv_uuid', str, False),
+			('metadata_lv', str, False), ('mirror_log', str, False),
+			('lv_modules', str, False), ('move_pv', str, False),
+			('origin', str, False), ('origin_size', long, False),
+			('pool_lv', str, False), ('raid_max_recovery_rate', long, False),
+			('raid_min_recovery_rate', long, False),
+			('raid_mismatch_count', long, False),
+			('raid_sync_action', str, False),
+			('raid_write_behind', long, False), ('seg_count', long, False),
+			('snap_percent', long, False), ('sync_percent', long, False)]
+
+		# Generic test case, make sure we get what we expect
+		for t in lv_properties:
+			self._test_prop(lv, *t)
+
+		segments = lv.listLVsegs()
+		if segments and len(segments):
+			for s in segments:
+				for t in lv_seg_properties:
+					self._test_prop(s, *t)
+
+		# Test specific cases
+		tag = 'hello_world'
+		lv.addTag(tag)
+		tags = lv.getProperty('lv_tags')
+		self.assertTrue(tag in tags[0])
 		vg.close()
 
 	def test_lv_tags(self):
-- 
1.8.2.1

[PATCH 1/5] lvm2app: Add signed numerical property values

[Peter Rajnoha]

On 05/05/2015 11:34 PM, Tony Asleson wrote:
> Currently lvm2app properties have the following structure:
> 
> typedef struct lvm_property_value {
>         uint32_t is_settable:1;
>         uint32_t is_string:1;
>         uint32_t is_integer:1;
>         uint32_t is_valid:1;
>         uint32_t padding:28;
>         union {
>                 const char *string;
>                 uint64_t integer;
>         } value;
> } lvm_property_value_t;
> 
> which assumes that numerical values were in the range of 0 to 2**64-1.  However,
> some of the properties were 'signed', like LV major/minor numbers and some
> reserved values for properties that represent percentages.  Thus when the
> values were retrieved they were in two's complement notation.  So for a -1
> major number the API user would get a value of 18446744073709551615.  The
> API user could cast the returned value to an int64_t to handle this, but that
> requires the API developer to look at the source code and determine when it
> should be done.
> 
> This change modifies the return property structure to:
> 
> typedef struct lvm_property_value {
>         uint32_t is_settable:1;
>         uint32_t is_string:1;
>         uint32_t is_integer:1;
>         uint32_t is_valid:1;
>         uint32_t is_signed:1;
>         uint32_t padding:27;
>         union {
>                 const char *string;
>                 uint64_t integer;
>                 int64_t signed_integer;
>         } value;
> } lvm_property_value_t;
> 
...
> +FIELD(LVS, lv, SNUM, "Maj", major, 3, int32, lv_major, "Persistent major number or -1 if not persistent.", 0)
> +FIELD(LVS, lv, SNUM, "Min", minor, 3, int32, lv_minor, "Persistent minor number or -1 if not persistent.", 0)
...
> +FIELD(LVSINFO, lv, SNUM, "KMaj", lvid, 4, lvkmaj, lv_kernel_major, "Currently assigned major number or -1 if LV is not active.", 0)
> +FIELD(LVSINFO, lv, SNUM, "KMin", lvid, 4, lvkmin, lv_kernel_minor, "Currently assigned minor number or -1 if LV is not active.", 0)
>  FIELD(LVSINFO, lv, SIZ, "KRahead", lvid, 7, lvkreadahead, lv_kernel_read_ahead, "Currently-in-use read ahead setting in current units.", 0)
>  FIELD(LVSINFO, lv, STR, "LPerms", lvid, 8, lvpermissions, lv_permissions, "LV permissions.", 0)
>  FIELD(LVSINFO, lv, BIN, "Suspended", lvid, 10, lvsuspended, lv_suspended, "Set if LV is suspended.", 0)
...
> diff --git a/lib/report/report.c b/lib/report/report.c
> index 500bf2b..a107669 100644
> --- a/lib/report/report.c
> +++ b/lib/report/report.c
> @@ -2057,6 +2057,7 @@ static const struct dm_report_object_type _devtypes_report_types[] = {
>  #define SIZ DM_REPORT_FIELD_TYPE_SIZE
>  #define PCT DM_REPORT_FIELD_TYPE_PERCENT
>  #define STR_LIST DM_REPORT_FIELD_TYPE_STRING_LIST
> +#define SNUM DM_REPORT_FIELD_TYPE_NUMBER

Yes, for now, these negative numbers are here to indicate individual
special values only (just like the "-1" for major/minor/kmajor/kminor
when it's "undefined").

When it comes to reporting, we cover these extra values at the moment
with "reserved" values (defined in values.h). But once we need to report
negative numbers fully, not just individual reserved values, we'd need
similar patch for reporting part too, introducing new DM_REPORT_FIELD_TYPE_SIGNED_NUMBER.

But for now, I think it's fine to map SNUM to DM_REPORT_FILED_TYPE_NUMBER
as we don't actually report negative numbers in their full range, it's
just the "-1" (with the "undefined", "undef", "unknown" synonyms for
those 4 fields).

But we surely need your patch for the liblvm as we don't export these
synonyms/reserved values via liblvm in any way so liblvm users
don't know about these mappings of these special values...

-- 
Peter

[PATCH 4/5] lvm2app: Correct missing string properties

[Peter Rajnoha]

On 05/05/2015 11:34 PM, Tony Asleson wrote:
> Synopsis: STR_LIST needs to be treated as STR for properties.
> 
> For any lvm property that was internally 'typed' as a string list we were failing
> to return a string in the property API.  This was due to the fact that for the
> properties to work the value needs to either be evaulated as a string or a
> number.  This change corrects the macro used to build the memory array of
> structures so that the string bitfield is set as needed to ensure that the value
> is a string.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1139920
> 
> Signed-off-by: Tony Asleson <tasleson@redhat.com>
> ---
>  lib/properties/prop_common.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/properties/prop_common.h b/lib/properties/prop_common.h
> index 0b1678d..9cc963a 100644
> --- a/lib/properties/prop_common.h
> +++ b/lib/properties/prop_common.h
> @@ -132,6 +132,6 @@ static int _ ## NAME ## _get (const void *obj, struct lvm_property_type *prop) \
>  
>  #define FIELD_MODIFIABLE 0x00000001
>  #define FIELD(type, strct, field_type, head, field, width, fn, id, desc, settable) \
> -	{ type, #id, settable, field_type == STR, ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
> +	{ type, #id, settable, (field_type == STR || field_type == STR_LIST), ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },

My mistake! I always forget to add these. Thanks for fixing this!

-- 
Peter

[PATCH 4/5] lvm2app: Correct missing string properties

[Tony Asleson]

We were not handling the case correctly where the return value was a
string list instead of simply being a string.

https://bugzilla.redhat.com/show_bug.cgi?id=1139920

Signed-off-by: Tony Asleson <tasleson@redhat.com>
---
 lib/properties/prop_common.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/properties/prop_common.h b/lib/properties/prop_common.h
index 0b1678d..9cc963a 100644
--- a/lib/properties/prop_common.h
+++ b/lib/properties/prop_common.h
@@ -132,6 +132,6 @@ static int _ ## NAME ## _get (const void *obj, struct lvm_property_type *prop) \
 
 #define FIELD_MODIFIABLE 0x00000001
 #define FIELD(type, strct, field_type, head, field, width, fn, id, desc, settable) \
-	{ type, #id, settable, field_type == STR, ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
+	{ type, #id, settable, (field_type == STR || field_type == STR_LIST), ((field_type == NUM) || (field_type == BIN) || (field_type == SIZ) || (field_type == PCT) || (field_type == SNUM)), ((field_type == SNUM) || (field_type == PCT)), { .integer = 0 }, _ ## id ## _get, _ ## id ## _set },
 
 #endif
-- 
1.7.1