1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

// Copyright 2020 John Millikin and the rust-fuse contributors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

use crate::protocol::prelude::*;
use crate::protocol::release::fuse_release_in_v7p1;

#[cfg(test)]
mod releasedir_test;

// ReleasedirRequest {{{

/// Request type for [`FuseHandlers::releasedir`].
///
/// [`FuseHandlers::releasedir`]: ../../trait.FuseHandlers.html#method.releasedir
pub struct ReleasedirRequest<'a> {
	phantom: PhantomData<&'a ()>,
	node_id: NodeId,
	handle: u64,
	lock_owner: Option<u64>,
	opendir_flags: u32,
}

impl ReleasedirRequest<'_> {
	pub fn node_id(&self) -> NodeId {
		self.node_id
	}

	/// The value passed to [`OpendirResponse::set_handle`], or zero if not set.
	///
	/// [`OpendirResponse::set_handle`]: protocol/struct.OpendirResponse.html#method.set_handle
	pub fn handle(&self) -> u64 {
		self.handle
	}

	pub fn lock_owner(&self) -> Option<u64> {
		self.lock_owner
	}

	/// Platform-specific flags passed to [`FuseHandlers::opendir`]. See
	/// [`OpendirRequest::flags`] for details.
	///
	/// [`FuseHandlers::opendir`]: ../../trait.FuseHandlers.html#method.opendir
	/// [`OpendirRequest::flags`]: struct.OpendirRequest.html#method.flags
	pub fn opendir_flags(&self) -> u32 {
		self.opendir_flags
	}
}

impl fmt::Debug for ReleasedirRequest<'_> {
	fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
		fmt.debug_struct("ReleasedirRequest")
			.field("node_id", &self.node_id)
			.field("handle", &self.handle)
			.field("lock_owner", &self.lock_owner)
			.field("opendir_flags", &DebugHexU32(self.opendir_flags))
			.finish()
	}
}

impl<'a> fuse_io::DecodeRequest<'a> for ReleasedirRequest<'a> {
	fn decode_request(
		mut dec: fuse_io::RequestDecoder<'a>,
	) -> Result<Self, Error> {
		let header = dec.header();
		debug_assert!(header.opcode == fuse_kernel::FUSE_RELEASEDIR);

		let node_id = try_node_id(header.nodeid)?;

		// FUSE v7.8 added new fields to `fuse_release_in`.
		if dec.version().minor() < 8 {
			let raw: &'a fuse_release_in_v7p1 = dec.next_sized()?;
			return Ok(Self {
				phantom: PhantomData,
				node_id,
				handle: raw.fh,
				lock_owner: None,
				opendir_flags: raw.flags,
			});
		}

		let raw: &'a fuse_kernel::fuse_release_in = dec.next_sized()?;

		let mut lock_owner = None;
		if raw.release_flags & fuse_kernel::FUSE_RELEASE_FLOCK_UNLOCK != 0 {
			lock_owner = Some(raw.lock_owner);
		}

		Ok(Self {
			phantom: PhantomData,
			node_id,
			handle: raw.fh,
			lock_owner,
			opendir_flags: raw.flags,
		})
	}
}

// }}}

// ReleasedirResponse {{{

/// Response type for [`FuseHandlers::releasedir`].
///
/// [`FuseHandlers::releasedir`]: ../../trait.FuseHandlers.html#method.releasedir
pub struct ReleasedirResponse<'a> {
	phantom: PhantomData<&'a ()>,
}

impl<'a> ReleasedirResponse<'a> {
	pub fn new() -> ReleasedirResponse<'a> {
		Self {
			phantom: PhantomData,
		}
	}
}

impl fmt::Debug for ReleasedirResponse<'_> {
	fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
		fmt.debug_struct("ReleasedirResponse").finish()
	}
}

impl fuse_io::EncodeResponse for ReleasedirResponse<'_> {
	fn encode_response<'a, Chan: fuse_io::Channel>(
		&'a self,
		enc: fuse_io::ResponseEncoder<Chan>,
	) -> Result<(), Chan::Error> {
		enc.encode_header_only()
	}
}

// }}}