mirror of https://github.com/acidanthera/audk.git
c3f76ef89d
The EFI_FILE_PROTOCOL.SetInfo() member is somewhat under-specified; one of its modes of operation is renaming/moving the file. In order to create the destination pathname in canonical format, 2*2=4 cases have to be considered. For the sake of discussion, assume the current canonical pathname of a VIRTIO_FS_FILE is "/home/user/f1.txt". Then, consider the following rename/move requests from EFI_FILE_PROTOCOL.SetInfo(): Destination requested Destination Move into Destination in by SetInfo() relative? directory? canonical format --------------------- ----------- ---------- ----------------------- L"\\dir\\f2.txt" no no "/dir/f2.txt" L"\\dir\\" no yes "/dir/f1.txt" L"dir\\f2.txt" yes no "/home/user/dir/f2.txt" L"dir\\" yes yes "/home/user/dir/f1.txt" Add the VirtioFsComposeRenameDestination() function, for composing the last column from the current canonical pathname and the SetInfo() input. The function works on the following principles: - The prefix of the destination path is "/", if the SetInfo() rename request is absolute. Otherwise, the dest prefix is the "current directory" (the most specific parent directory) of the original pathname (in the above example, "/home/user"). - The suffix of the destination path is precisely the SetInfo() request string, if the "move into directory" convenience format -- the trailing backslash -- is not used. (In the above example, L"\\dir\\f2.txt" and L"dir\\f2.txt".) Otherwise, the suffix is the SetInfo() request, plus the original basename (in the above example, L"\\dir\\f1.txt" and L"dir\\f1.txt"). - The complete destination is created by fusing the dest prefix and the dest suffix, using the VirtioFsAppendPath() function. Cc: Ard Biesheuvel <ard.biesheuvel@arm.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20201216211125.19496-43-lersek@redhat.com> Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com> |
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| .. | ||
| DriverBinding.c | ||
| FuseFlush.c | ||
| FuseForget.c | ||
| FuseFsync.c | ||
| FuseGetAttr.c | ||
| FuseInit.c | ||
| FuseLookup.c | ||
| FuseMkDir.c | ||
| FuseOpen.c | ||
| FuseOpenDir.c | ||
| FuseOpenOrCreate.c | ||
| FuseRead.c | ||
| FuseRelease.c | ||
| FuseRename.c | ||
| FuseStatFs.c | ||
| FuseUnlink.c | ||
| FuseWrite.c | ||
| Helpers.c | ||
| SimpleFsClose.c | ||
| SimpleFsDelete.c | ||
| SimpleFsFlush.c | ||
| SimpleFsGetInfo.c | ||
| SimpleFsGetPosition.c | ||
| SimpleFsOpen.c | ||
| SimpleFsOpenVolume.c | ||
| SimpleFsRead.c | ||
| SimpleFsSetInfo.c | ||
| SimpleFsSetPosition.c | ||
| SimpleFsWrite.c | ||
| VirtioFsDxe.h | ||
| VirtioFsDxe.inf | ||