Kenneth Skovhede
0f81b42146
This PR adds support for locking files if the backend supports it. To activate locking, set the option `--file-lock-duration=30D` and the backup will lock the files. If the database is rebuilt with the intention of continuing the backups, use the option `--repair-refresh-lock-info` which will update lock information in the database after recreating the database. The locking works by asking the backend to lock files after a backup has completed. The implementation keeps track of which files are currently assigned a lock and prevents attempting to delete the files that are currently locked. Note that the bucket should not have a default lock policy as Duplicati needs to finish the backup before the locking is applied. In this initial version, Azure Blob Storage, B2, S3 and iDrive are supported with locking. The CLI is updated to allow setting locks on a specific version. The backend tool is updated to allow setting locks on specific files.
50 lines
2.5 KiB
C#
50 lines
2.5 KiB
C#
// Copyright (C) 2025, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Duplicati.Library.Interface
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{
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/// <summary>
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/// An interface a backend may implement if it supports object locking operations.
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/// </summary>
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public interface ILockingBackend : IBackend
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{
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/// <summary>
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/// Gets the expiration time for the immutable object lock on a remote file, if one is set.
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/// </summary>
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/// <param name="remotename">The remote filename, relative to the root.</param>
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/// <param name="cancellationToken">Token to cancel the operation.</param>
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/// <returns>The UTC time when the object lock expires, or <c>null</c> if not set or unknown.</returns>
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Task<DateTime?> GetObjectLockUntilAsync(string remotename, CancellationToken cancellationToken);
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/// <summary>
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/// Applies or updates the immutable object lock for a remote file.
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/// </summary>
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/// <param name="remotename">The remote filename, relative to the root.</param>
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/// <param name="lockUntilUtc">The UTC time until which the object lock should remain in effect.</param>
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/// <param name="cancellationToken">Token to cancel the operation.</param>
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Task SetObjectLockUntilAsync(string remotename, DateTime lockUntilUtc, CancellationToken cancellationToken);
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}
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}
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