sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines. Possible replacements are

sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines. Possible replacements are for:
* bus_t
* exception_t
* manager_t
* match_t
* message_t
* object_t
* slot_t

Change-Id: I02e8e49b245f1f42d10983fee65f05efc5326fc7
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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OpenPOWER: Limit User-Requested System Dumps

System dumps can be several gigabytes in size. To conserve space,
only one dump is stored at a time. When a new dump is requested,
the existing dump will

OpenPOWER: Limit User-Requested System Dumps

System dumps can be several gigabytes in size. To conserve space,
only one dump is stored at a time. When a new dump is requested,
the existing dump will be discarded while creating a new one.
In the case of system-generated dumps, which are triggered by
critical errors, it is permissible to initiate a new dump even
if an existing dump is already present in the host memory
This commit adds a restriction on initiating new user-requested system
dumps while a system dump is in progress or if one is already stored
in host memory.

New user-requested system dumps will be allowed once the existing
dump is deleted or offloaded.

This change applies only to user-requested dumps and does not impact
system generated dumps.

Test:
- Initiate system dump when another dump in progress and verified
a Unavailable was returned
- Force a system generated system dump when one dump is present
a Unavailable was returned

Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
Change-Id: I4598912b0761669859f84a43ab4c60f47664b1e6

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OpenPOWER: Add support for OpenPOWER dump policy

This commit introduces support for the system dump policy,
wherein 'system dump' refers to all OpenPOWER dumps.
This term encompasses all dumps from

OpenPOWER: Add support for OpenPOWER dump policy

This commit introduces support for the system dump policy,
wherein 'system dump' refers to all OpenPOWER dumps.
This term encompasses all dumps from host subsystems on
OpenPOWER systems, which are collectively referred to
as system dumps. The currently supported policy is
'dump enable'. A dump will be created only if this
policy is enabled. If the policy is not enabled,
a 'dump disabled' error message will be returned.

In scenarios where the settings service is unavailable,
the system will default to considering the dump as enabled.

Tests:
- Create a dump with policy enabled
busctl --verbose call xyz.openbmc_project.Settings \
/xyz/openbmc_project/dump/system_dump_policy \
org.freedesktop.DBus.Properties \
Get ss "xyz.openbmc_project.Object.Enable" "Enabled"
MESSAGE "v" {
VARIANT "b" {
BOOLEAN true;
};
};

busctl --verbose call xyz.openbmc_project.Dump.Manager \
/xyz/openbmc_project/dump/resource \
xyz.openbmc_project.Dump.Create CreateDump a{sv} 2 \
"com.ibm.Dump.Create.CreateParameters.VSPString" s \
"vsp" "com.ibm.Dump.Create.CreateParameters.Password" \
s "password"
MESSAGE "o" {
OBJECT_PATH "/xyz/openbmc_project/dump/resource/entry/1";
};

Result: Dump created

- Create a dump with policy disabled
busctl --verbose call xyz.openbmc_project.Settings \
/xyz/openbmc_project/dump/system_dump_policy \
org.freedesktop.DBus.Properties Get ss \
"xyz.openbmc_project.Object.Enable" "Enabled"
MESSAGE "v" {
VARIANT "b" {
BOOLEAN false;
};
};

busctl --verbose call xyz.openbmc_project.Dump.Manager \
/xyz/openbmc_project/dump/resource \
xyz.openbmc_project.Dump.Create CreateDump a{sv} 2 \
"com.ibm.Dump.Create.CreateParameters.VSPString" s "vsp" \
"com.ibm.Dump.Create.CreateParameters.Password" s "password"
Call failed: Dump is disabled on this system.

Result: Dump is not allowed

Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
Change-Id: I5dc609b1f4fd0f36df8520f8a75c18a4cd3d7c4c

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