From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <c.ebner@proxmox.com>
Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits))
(No client certificate requested)
by lists.proxmox.com (Postfix) with ESMTPS id C8E4A90AFF
for <pbs-devel@lists.proxmox.com>; Thu, 25 Jan 2024 14:26:53 +0100 (CET)
Received: from firstgate.proxmox.com (localhost [127.0.0.1])
by firstgate.proxmox.com (Proxmox) with ESMTP id AB9841993B
for <pbs-devel@lists.proxmox.com>; Thu, 25 Jan 2024 14:26:23 +0100 (CET)
Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com
[94.136.29.106])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits))
(No client certificate requested)
by firstgate.proxmox.com (Proxmox) with ESMTPS
for <pbs-devel@lists.proxmox.com>; Thu, 25 Jan 2024 14:26:23 +0100 (CET)
Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1])
by proxmox-new.maurer-it.com (Proxmox) with ESMTP id E2B1D492AD
for <pbs-devel@lists.proxmox.com>; Thu, 25 Jan 2024 14:26:22 +0100 (CET)
From: Christian Ebner <c.ebner@proxmox.com>
To: pbs-devel@lists.proxmox.com
Date: Thu, 25 Jan 2024 14:25:42 +0100
Message-Id: <20240125132608.1172472-4-c.ebner@proxmox.com>
X-Mailer: git-send-email 2.39.2
In-Reply-To: <20240125132608.1172472-1-c.ebner@proxmox.com>
References: <20240125132608.1172472-1-c.ebner@proxmox.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-SPAM-LEVEL: Spam detection results: 0
AWL 0.053 Adjusted score from AWL reputation of From: address
BAYES_00 -1.9 Bayes spam probability is 0 to 1%
DMARC_MISSING 0.1 Missing DMARC policy
KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment
SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record
SPF_PASS -0.001 SPF: sender matches SPF record
T_SCC_BODY_TEXT_LINE -0.01 -
Subject: [pbs-devel] [PATCH v6 pxar 3/29] fix #3174: encoder: calc filename
+ metadata byte size
X-BeenThere: pbs-devel@lists.proxmox.com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Proxmox Backup Server development discussion
<pbs-devel.lists.proxmox.com>
List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pbs-devel>,
<mailto:pbs-devel-request@lists.proxmox.com?subject=unsubscribe>
List-Archive: <http://lists.proxmox.com/pipermail/pbs-devel/>
List-Post: <mailto:pbs-devel@lists.proxmox.com>
List-Help: <mailto:pbs-devel-request@lists.proxmox.com?subject=help>
List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pbs-devel>,
<mailto:pbs-devel-request@lists.proxmox.com?subject=subscribe>
X-List-Received-Date: Thu, 25 Jan 2024 13:26:53 -0000
Introduce SeqSink and impl SeqWrite in order to create an encoder
implementation which instead of writing data to a stream, consumes
the encoded stream and returns the consumed bytes for that stream.
Based on this, implement a helper function `byte_len` which returns the
byte size of the filename entry and metadata entry as encoded by the
archive.
Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
---
Changes since v5:
- no changes
src/encoder/mod.rs | 35 +++++++++++++++++++++++++++++++++++
src/encoder/sync.rs | 5 +++++
2 files changed, 40 insertions(+)
diff --git a/src/encoder/mod.rs b/src/encoder/mod.rs
index 0d342ec..860c21f 100644
--- a/src/encoder/mod.rs
+++ b/src/encoder/mod.rs
@@ -85,6 +85,24 @@ where
}
}
+#[derive(Default)]
+/// Sink to consume sequential byte stream
+pub struct SeqSink;
+
+impl SeqWrite for SeqSink {
+ fn poll_seq_write(
+ self: Pin<&mut Self>,
+ _cx: &mut Context,
+ buf: &[u8],
+ ) -> Poll<io::Result<usize>> {
+ Poll::Ready(Ok(buf.len()))
+ }
+
+ fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context) -> Poll<io::Result<()>> {
+ Poll::Ready(Ok(()))
+ }
+}
+
/// awaitable verison of `poll_seq_write`.
async fn seq_write<T: SeqWrite + ?Sized>(
output: &mut T,
@@ -183,6 +201,23 @@ where
seq_write_pxar_entry(output, htype, buf, position).await
}
+/// Calculate the encoded byte len of filename and metadata struct
+pub async fn encoded_size(filename: &std::ffi::CStr, metadata: &Metadata) -> io::Result<u64> {
+ let mut this = EncoderImpl {
+ output: EncoderOutput::Owned(SeqSink::default()),
+ state: EncoderState::default(),
+ parent: None,
+ finished: false,
+ file_copy_buffer: Arc::new(Mutex::new(unsafe {
+ crate::util::vec_new_uninitialized(1024 * 1024)
+ })),
+ };
+
+ this.start_file_do(Some(metadata), filename.to_bytes())
+ .await?;
+ Ok(this.position())
+}
+
/// Error conditions caused by wrong usage of this crate.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum EncodeError {
diff --git a/src/encoder/sync.rs b/src/encoder/sync.rs
index 1ec91b8..93c3b2c 100644
--- a/src/encoder/sync.rs
+++ b/src/encoder/sync.rs
@@ -228,3 +228,8 @@ impl<T: io::Write> SeqWrite for StandardWriter<T> {
Poll::Ready(self.pin_to_inner().and_then(|inner| inner.flush()))
}
}
+
+/// Calculate the encoded byte len of filename and metadata struct
+pub fn encoded_size(filename: &std::ffi::CStr, metadata: &Metadata) -> io::Result<u64> {
+ poll_result_once(crate::encoder::encoded_size(filename, metadata))
+}
--
2.39.2