commit - c025a41e7f67c88958f622544f1045bd18a482c3
commit + 1e4880cbfee9d652ec24606387f69819c96da4e2
blob - 19198aeebdb4e90ebbe8dc7628be1cbb53784090
blob + e4d4cb98585281191f6cfe184696e2b55449afd3
--- lib/got_lib_privsep.h
+++ lib/got_lib_privsep.h
* Data is communicated between processes via imsg_read(3)/imsg_compose(3).
* This behaviour is transparent to users of the library.
*
- * File descriptor passing is used in cases where sizes exceed MAX_IMSGSIZE.
+ * We generally transmit data in imsg buffers, split across several messages
+ * if necessary. File descriptor passing is used in cases where this is
+ * impractical, such as when accessing pack files or when transferring
+ * large blobs.
*
* We currently do not exec(2) after a fork(2).
* To achieve fork+exec, relevant parts of our library functionality could
/* An error occured while processing a request. */
GOT_IMSG_ERROR,
+ /* Messages for transmitting deltas and associated delta streams. */
+ GOT_IMSG_DELTA,
+ GOT_IMSG_DELTA_STREAM,
+
/*
* Messages concerned with read access to objects in a repository.
* Object and pack files are opened by the main process, where
*/
GOT_IMSG_READ_LOOSE_OBJECT_HEADER_REQUEST,
GOT_IMSG_READ_LOOSE_OBJECT_HEADER_REPLY,
- GOT_IMSG_DELTA,
GOT_IMSG_READ_LOOSE_BLOB_OBJECT_REQUEST,
GOT_IMSG_READ_LOOSE_BLOB_OBJECT_REPLY,
GOT_IMSG_READ_LOOSE_TREE_OBJECT_REQUEST,
int code; /* an error code from got_error.h */
};
+/* Structure for GOT_IMSG_DELTA data. */
+struct got_imsg_delta {
+ /* These fields are the same as in struct got_delta. */
+ off_t offset;
+ size_t tslen;
+ int type;
+ size_t size;
+ off_t data_offset;
+ size_t delta_len;
+
+ /*
+ * Followed by DELTA_STREAM messages until delta_len bytes
+ * of delta stream data have been transmitted.
+ */
+};
+
+/* Structure for GOT_IMSG_DELTA_STREAM data. */
+struct got_imsg_delta_stream {
+ /*
+ * Empty since the following is implied:
+ * Read delta stream data from imsg buffer.
+ */
+};
+
/* Structure for GOT_IMSG_READ_LOOSE_OBJECT_HEADER_REQUEST data. */
struct got_imsg_read_loose_object_header_request {
/*
int ndeltas; /* this many GOT_IMSG_DELTA messages follow */
};
-/* Structure for GOT_IMSG_DELTA data. */
-struct got_imsg_delta {
- /* These fields are the same as in struct got_delta. */
- off_t offset;
- size_t tslen;
- int type;
- size_t size;
- off_t data_offset;
- size_t delta_len;
-
- /*
- * Followed by raw delta data: If imsg fd == -1 then read
- * delta data from imsg buffer, else read from fd.
- */
-};
-
/* TODO: Implement the above, and then add more message data types here. */