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Clean the SD card save directory when opening the emulator (#2564)

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Cleans "sdcard:/Nintendo/save" and deletes "sdcard:/save" when opening the emulator.

Works around invalid encryption when keys or the SD card encryption seed are changed.
This commit is contained in:
Alex Barney 2021-08-20 13:36:14 -07:00 • committed by GitHub
parent 97aedc030d
commit e0af248e6f
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 34 deletions
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26
Ryujinx.HLE/HOS/LibHacHorizonManager.cs
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@ -1,5 +1,8 @@
using LibHac;
using LibHac.Bcat;
using LibHac.Common;
using LibHac.Fs.Fsa;
using LibHac.Fs.Shim;
using LibHac.FsSrv.Impl;
using LibHac.Loader;
using LibHac.Ncm;
@ -57,6 +60,8 @@ namespace Ryujinx.HLE.HOS
virtualFileSystem.InitializeFsServer(Server, out var fsClient);
FsClient = fsClient;
CleanSdCardDirectory();
}
public void InitializeSystemClients()
@ -80,6 +85,27 @@ namespace Ryujinx.HLE.HOS
npdm.FsAccessControlData, npdm.FsAccessControlDescriptor);
}
// This function was added to avoid errors that come from a user's keys or SD encryption seed changing.
// Catching these errors and recreating the file ended up not working because of the different ways
// applications respond to a file suddenly containing all zeros or having a length of zero.
// Clearing the SD card save directory was determined to be the best option for the moment since
// the saves on the SD card are meant as caches that can be deleted at any time.
private void CleanSdCardDirectory()
{
Result rc = RyujinxClient.Fs.MountSdCard("sdcard".ToU8Span());
if (rc.IsFailure()) return;
try
{
RyujinxClient.Fs.CleanDirectoryRecursively("sdcard:/Nintendo/save".ToU8Span()).IgnoreResult();
RyujinxClient.Fs.DeleteDirectoryRecursively("sdcard:/save".ToU8Span()).IgnoreResult();
}
finally
{
RyujinxClient.Fs.Unmount("sdcard".ToU8Span());
}
}
private static AccessControlBits.Bits AccountFsPermissions => AccessControlBits.Bits.SystemSaveData |
AccessControlBits.Bits.GameCard |
AccessControlBits.Bits.SaveDataMeta |