[PATCH v7 15/21] dts: os session docstring update
Yoan Picchi
yoan.picchi at foss.arm.com
Wed Nov 22 12:50:18 CET 2023
On 11/15/23 13:09, Juraj Linkeš wrote:
> Format according to the Google format and PEP257, with slight
> deviations.
>
> Signed-off-by: Juraj Linkeš <juraj.linkes at pantheon.tech>
> ---
> dts/framework/testbed_model/os_session.py | 275 ++++++++++++++++------
> 1 file changed, 208 insertions(+), 67 deletions(-)
>
> diff --git a/dts/framework/testbed_model/os_session.py b/dts/framework/testbed_model/os_session.py
> index 76e595a518..72b9193a61 100644
> --- a/dts/framework/testbed_model/os_session.py
> +++ b/dts/framework/testbed_model/os_session.py
> @@ -2,6 +2,29 @@
> # Copyright(c) 2023 PANTHEON.tech s.r.o.
> # Copyright(c) 2023 University of New Hampshire
>
> +"""OS-aware remote session.
> +
> +DPDK supports multiple different operating systems, meaning it can run on these different operating
> +systems. This module defines the common API that OS-unaware layers use and translates the API into
> +OS-aware calls/utility usage.
> +
> +Note:
> + Running commands with administrative privileges requires OS awareness. This is the only layer
> + that's aware of OS differences, so this is where non-privileged command get converted
> + to privileged commands.
> +
> +Example:
> + A user wishes to remove a directory on
> + a remote :class:`~framework.testbed_model.sut_node.SutNode`.
> + The :class:`~framework.testbed_model.sut_node.SutNode` object isn't aware what OS the node
> + is running - it delegates the OS translation logic
> + to :attr:`~framework.testbed_model.node.Node.main_session`. The SUT node calls
> + :meth:`~OSSession.remove_remote_dir` with a generic, OS-unaware path and
> + the :attr:`~framework.testbed_model.node.Node.main_session` translates that
> + to ``rm -rf`` if the node's OS is Linux and other commands for other OSs.
> + It also translates the path to match the underlying OS.
> +"""
> +
> from abc import ABC, abstractmethod
> from collections.abc import Iterable
> from ipaddress import IPv4Interface, IPv6Interface
> @@ -28,10 +51,16 @@
>
>
> class OSSession(ABC):
> - """
> - The OS classes create a DTS node remote session and implement OS specific
> + """OS-unaware to OS-aware translation API definition.
> +
> + The OSSession classes create a remote session to a DTS node and implement OS specific
> behavior. There a few control methods implemented by the base class, the rest need
> - to be implemented by derived classes.
> + to be implemented by subclasses.
> +
> + Attributes:
> + name: The name of the session.
> + remote_session: The remote session maintaining the connection to the node.
> + interactive_session: The interactive remote session maintaining the connection to the node.
> """
>
> _config: NodeConfiguration
> @@ -46,6 +75,15 @@ def __init__(
> name: str,
> logger: DTSLOG,
> ):
> + """Initialize the OS-aware session.
> +
> + Connect to the node right away and also create an interactive remote session.
> +
> + Args:
> + node_config: The test run configuration of the node to connect to.
> + name: The name of the session.
> + logger: The logger instance this session will use.
> + """
> self._config = node_config
> self.name = name
> self._logger = logger
> @@ -53,15 +91,15 @@ def __init__(
> self.interactive_session = create_interactive_session(node_config, logger)
>
> def close(self, force: bool = False) -> None:
> - """
> - Close the remote session.
> + """Close the underlying remote session.
> +
> + Args:
> + force: Force the closure of the connection.
> """
> self.remote_session.close(force)
>
> def is_alive(self) -> bool:
> - """
> - Check whether the remote session is still responding.
> - """
> + """Check whether the underlying remote session is still responding."""
> return self.remote_session.is_alive()
>
> def send_command(
> @@ -72,10 +110,23 @@ def send_command(
> verify: bool = False,
> env: dict | None = None,
> ) -> CommandResult:
> - """
> - An all-purpose API in case the command to be executed is already
> - OS-agnostic, such as when the path to the executed command has been
> - constructed beforehand.
> + """An all-purpose API for OS-agnostic commands.
> +
> + This can be used for an execution of a portable command that's executed the same way
> + on all operating systems, such as Python.
> +
> + The :option:`--timeout` command line argument and the :envvar:`DTS_TIMEOUT`
> + environment variable configure the timeout of command execution.
> +
> + Args:
> + command: The command to execute.
> + timeout: Wait at most this long in seconds to execute the command.
confusing start/end of execution
> + privileged: Whether to run the command with administrative privileges.
> + verify: If :data:`True`, will check the exit code of the command.
> + env: A dictionary with environment variables to be used with the command execution.
> +
> + Raises:
> + RemoteCommandExecutionError: If verify is :data:`True` and the command failed.
> """
> if privileged:
> command = self._get_privileged_command(command)
> @@ -89,8 +140,20 @@ def create_interactive_shell(
> privileged: bool,
> app_args: str,
> ) -> InteractiveShellType:
> - """
> - See "create_interactive_shell" in SutNode
> + """Factory for interactive session handlers.
> +
> + Instantiate `shell_cls` according to the remote OS specifics.
> +
> + Args:
> + shell_cls: The class of the shell.
> + timeout: Timeout for reading output from the SSH channel. If you are
> + reading from the buffer and don't receive any data within the timeout
> + it will throw an error.
> + privileged: Whether to run the shell with administrative privileges.
> + app_args: The arguments to be passed to the application.
> +
> + Returns:
> + An instance of the desired interactive application shell.
> """
> return shell_cls(
> self.interactive_session.session,
> @@ -114,27 +177,42 @@ def _get_privileged_command(command: str) -> str:
>
> @abstractmethod
> def guess_dpdk_remote_dir(self, remote_dir: str | PurePath) -> PurePath:
> - """
> - Try to find DPDK remote dir in remote_dir.
> + """Try to find DPDK directory in `remote_dir`.
> +
> + The directory is the one which is created after the extraction of the tarball. The files
> + are usually extracted into a directory starting with ``dpdk-``.
> +
> + Returns:
> + The absolute path of the DPDK remote directory, empty path if not found.
> """
>
> @abstractmethod
> def get_remote_tmp_dir(self) -> PurePath:
> - """
> - Get the path of the temporary directory of the remote OS.
> + """Get the path of the temporary directory of the remote OS.
> +
> + Returns:
> + The absolute path of the temporary directory.
> """
>
> @abstractmethod
> def get_dpdk_build_env_vars(self, arch: Architecture) -> dict:
> - """
> - Create extra environment variables needed for the target architecture. Get
> - information from the node if needed.
> + """Create extra environment variables needed for the target architecture.
> +
> + Different architectures may require different configuration, such as setting 32-bit CFLAGS.
> +
> + Returns:
> + A dictionary with keys as environment variables.
> """
>
> @abstractmethod
> def join_remote_path(self, *args: str | PurePath) -> PurePath:
> - """
> - Join path parts using the path separator that fits the remote OS.
> + """Join path parts using the path separator that fits the remote OS.
> +
> + Args:
> + args: Any number of paths to join.
> +
> + Returns:
> + The resulting joined path.
> """
>
> @abstractmethod
> @@ -143,13 +221,13 @@ def copy_from(
> source_file: str | PurePath,
> destination_file: str | PurePath,
> ) -> None:
> - """Copy a file from the remote Node to the local filesystem.
> + """Copy a file from the remote node to the local filesystem.
>
> - Copy source_file from the remote Node associated with this remote
> - session to destination_file on the local filesystem.
> + Copy `source_file` from the remote node associated with this remote
> + session to `destination_file` on the local filesystem.
>
> Args:
> - source_file: the file on the remote Node.
> + source_file: the file on the remote node.
> destination_file: a file or directory path on the local filesystem.
> """
>
> @@ -159,14 +237,14 @@ def copy_to(
> source_file: str | PurePath,
> destination_file: str | PurePath,
> ) -> None:
> - """Copy a file from local filesystem to the remote Node.
> + """Copy a file from local filesystem to the remote node.
>
> - Copy source_file from local filesystem to destination_file
> - on the remote Node associated with this remote session.
> + Copy `source_file` from local filesystem to `destination_file`
> + on the remote node associated with this remote session.
>
> Args:
> source_file: the file on the local filesystem.
> - destination_file: a file or directory path on the remote Node.
> + destination_file: a file or directory path on the remote node.
> """
>
> @abstractmethod
> @@ -176,8 +254,12 @@ def remove_remote_dir(
> recursive: bool = True,
> force: bool = True,
> ) -> None:
> - """
> - Remove remote directory, by default remove recursively and forcefully.
> + """Remove remote directory, by default remove recursively and forcefully.
> +
> + Args:
> + remote_dir_path: The path of the directory to remove.
> + recursive: If :data:`True`, also remove all contents inside the directory.
> + force: If :data:`True`, ignore all warnings and try to remove at all costs.
> """
>
> @abstractmethod
> @@ -186,9 +268,12 @@ def extract_remote_tarball(
> remote_tarball_path: str | PurePath,
> expected_dir: str | PurePath | None = None,
> ) -> None:
> - """
> - Extract remote tarball in place. If expected_dir is a non-empty string, check
> - whether the dir exists after extracting the archive.
> + """Extract remote tarball in its remote directory.
> +
> + Args:
> + remote_tarball_path: The path of the tarball on the remote node.
> + expected_dir: If non-empty, check whether `expected_dir` exists after extracting
> + the archive.
> """
>
> @abstractmethod
> @@ -201,69 +286,119 @@ def build_dpdk(
> rebuild: bool = False,
> timeout: float = SETTINGS.compile_timeout,
> ) -> None:
> - """
> - Build DPDK in the input dir with specified environment variables and meson
> - arguments.
> + """Build DPDK on the remote node.
> +
> + An extracted DPDK tarball must be present on the node. The build consists of two steps::
> +
> + meson setup <meson args> remote_dpdk_dir remote_dpdk_build_dir
> + ninja -C remote_dpdk_build_dir
> +
> + The :option:`--compile-timeout` command line argument and the :envvar:`DTS_COMPILE_TIMEOUT`
> + environment variable configure the timeout of DPDK build.
> +
> + Args:
> + env_vars: Use these environment variables then building DPDK.
> + meson_args: Use these meson arguments when building DPDK.
> + remote_dpdk_dir: The directory on the remote node where DPDK will be built.
> + remote_dpdk_build_dir: The target build directory on the remote node.
> + rebuild: If :data:`True`, do a subsequent build with ``meson configure`` instead
> + of ``meson setup``.
> + timeout: Wait at most this long in seconds for the build to execute.
confusing start/end of execution
> """
>
> @abstractmethod
> def get_dpdk_version(self, version_path: str | PurePath) -> str:
> - """
> - Inspect DPDK version on the remote node from version_path.
> + """Inspect the DPDK version on the remote node.
> +
> + Args:
> + version_path: The path to the VERSION file containing the DPDK version.
> +
> + Returns:
> + The DPDK version.
> """
>
> @abstractmethod
> def get_remote_cpus(self, use_first_core: bool) -> list[LogicalCore]:
> - """
> - Compose a list of LogicalCores present on the remote node.
> - If use_first_core is False, the first physical core won't be used.
> + r"""Get the list of :class:`~framework.testbed_model.cpu.LogicalCore`\s on the remote node.
> +
> + Args:
> + use_first_core: If :data:`False`, the first physical core won't be used.
> +
> + Returns:
> + The logical cores present on the node.
> """
>
> @abstractmethod
> def kill_cleanup_dpdk_apps(self, dpdk_prefix_list: Iterable[str]) -> None:
> - """
> - Kill and cleanup all DPDK apps identified by dpdk_prefix_list. If
> - dpdk_prefix_list is empty, attempt to find running DPDK apps to kill and clean.
> + """Kill and cleanup all DPDK apps.
> +
> + Args:
> + dpdk_prefix_list: Kill all apps identified by `dpdk_prefix_list`.
> + If `dpdk_prefix_list` is empty, attempt to find running DPDK apps to kill and clean.
> """
>
> @abstractmethod
> def get_dpdk_file_prefix(self, dpdk_prefix: str) -> str:
> - """
> - Get the DPDK file prefix that will be used when running DPDK apps.
> + """Make OS-specific modification to the DPDK file prefix.
> +
> + Args:
> + dpdk_prefix: The OS-unaware file prefix.
> +
> + Returns:
> + The OS-specific file prefix.
> """
>
> @abstractmethod
> - def setup_hugepages(self, hugepage_amount: int, force_first_numa: bool) -> None:
> - """
> - Get the node's Hugepage Size, configure the specified amount of hugepages
> + def setup_hugepages(self, hugepage_count: int, force_first_numa: bool) -> None:
> + """Configure hugepages on the node.
> +
> + Get the node's Hugepage Size, configure the specified count of hugepages
> if needed and mount the hugepages if needed.
> - If force_first_numa is True, configure hugepages just on the first socket.
> +
> + Args:
> + hugepage_count: Configure this many hugepages.
> + force_first_numa: If :data:`True`, configure hugepages just on the first socket.
force *numa* configures the first *socket* ?
> """
>
> @abstractmethod
> def get_compiler_version(self, compiler_name: str) -> str:
> - """
> - Get installed version of compiler used for DPDK
> + """Get installed version of compiler used for DPDK.
> +
> + Args:
> + compiler_name: The name of the compiler executable.
> +
> + Returns:
> + The compiler's version.
> """
>
> @abstractmethod
> def get_node_info(self) -> NodeInfo:
> - """
> - Collect information about the node
> + """Collect additional information about the node.
> +
> + Returns:
> + Node information.
> """
>
> @abstractmethod
> def update_ports(self, ports: list[Port]) -> None:
> - """
> - Get additional information about ports:
> - Logical name (e.g. enp7s0) if applicable
> - Mac address
> + """Get additional information about ports from the operating system and update them.
> +
> + The additional information is:
> +
> + * Logical name (e.g. ``enp7s0``) if applicable,
> + * Mac address.
> +
> + Args:
> + ports: The ports to update.
> """
>
> @abstractmethod
> def configure_port_state(self, port: Port, enable: bool) -> None:
> - """
> - Enable/disable port.
> + """Enable/disable `port` in the operating system.
> +
> + Args:
> + port: The port to configure.
> + enable: If :data:`True`, enable the port, otherwise shut it down.
> """
>
> @abstractmethod
> @@ -273,12 +408,18 @@ def configure_port_ip_address(
> port: Port,
> delete: bool,
> ) -> None:
> - """
> - Configure (add or delete) an IP address of the input port.
> + """Configure an IP address on `port` in the operating system.
> +
> + Args:
> + address: The address to configure.
> + port: The port to configure.
> + delete: If :data:`True`, remove the IP address, otherwise configure it.
> """
>
> @abstractmethod
> def configure_ipv4_forwarding(self, enable: bool) -> None:
> - """
> - Enable IPv4 forwarding in the underlying OS.
> + """Enable IPv4 forwarding in the operating system.
> +
> + Args:
> + enable: If :data:`True`, enable the forwarding, otherwise disable it.
> """
More information about the dev
mailing list