MTP: Add extended operations to support in-place editing of files
MTP does not support partial writes of files (the entire file must be transferred at once).
This makes it impossible to implement a FUSE file system for MTP
with acceptable performance.
To fix this problem, this change adds extended MTP operations to allow
partial writes to files:
SendPartialObject - allows writing a subset of a file, or appending to the end of a file
TruncateObject - allows changing the size of a file
BeginEditObject - must be called before using SendPartialObject and TruncateObject
EndEditObject - commits changes to a file after it has been edited with SendPartialObject or TruncateObject
We also add GetPartialObject64, which is the same as GetPartialObject
but has a 64 bit offset rather than 32.
Change-Id: I4b110748b97ae05cdc8aab02ecdbbbeb263f7840
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpDebug.cpp b/media/mtp/MtpDebug.cpp
index 1668ecf..9f3037d 100644
--- a/media/mtp/MtpDebug.cpp
+++ b/media/mtp/MtpDebug.cpp
@@ -63,6 +63,12 @@
{ "MTP_OPERATION_GET_OBJECT_REFERENCES", 0x9810 },
{ "MTP_OPERATION_SET_OBJECT_REFERENCES", 0x9811 },
{ "MTP_OPERATION_SKIP", 0x9820 },
+ // android extensions
+ { "MTP_OPERATION_GET_PARTIAL_OBJECT_64", 0x95C1 },
+ { "MTP_OPERATION_SEND_PARTIAL_OBJECT", 0x95C2 },
+ { "MTP_OPERATION_TRUNCATE_OBJECT", 0x95C3 },
+ { "MTP_OPERATION_BEGIN_EDIT_OBJECT", 0x95C4 },
+ { "MTP_OPERATION_END_EDIT_OBJECT", 0x95C5 },
{ 0, 0 },
};