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Add seek() 

Dehyphenate "data-transfer".
tags/v0.9.3
Michael Brown 18 years ago
parent
ff1222a8d3
commit
280160139d
4 changed files with 137 additions and 38 deletions
Split View Show Diff Stats
  1. 4
    4
      src/core/open.c
  2. 75
    18
      src/core/xfer.c
  3. 2
    2
      src/include/gpxe/open.h
  4. 56
    14
      src/include/gpxe/xfer.h

+ 4
- 4
src/core/open.c View File 

@@ -45,7 +45,7 @@ static struct socket_opener socket_openers_end[0]
45 45 
 /**
46 46 
  * Open URI
47 47 
  *
48 
- * @v xfer		Data-transfer interface
48 
+ * @v xfer		Data transfer interface
49 49 
  * @v uri_string	URI string (e.g. "http://etherboot.org/kernel")
50 50 
  * @ret rc		Return status code
51 51 
  */
 
@@ -74,7 +74,7 @@ int open_uri ( struct xfer_interface *xfer, const char *uri_string ) {
74 74 
 /**
75 75 
  * Open socket
76 76 
  *
77 
- * @v xfer		Data-transfer interface
77 
+ * @v xfer		Data transfer interface
78 78 
  * @v domain		Communication domain (e.g. PF_INET)
79 79 
  * @v type		Communication semantics (e.g. SOCK_STREAM)
80 80 
  */
 
@@ -101,7 +101,7 @@ int open_socket ( struct xfer_interface *xfer,
101 101 
 /**
102 102 
  * Open location
103 103 
  *
104 
- * @v xfer		Data-transfer interface
104 
+ * @v xfer		Data transfer interface
105 105 
  * @v type		Location type
106 106 
  * @v args		Remaining arguments depend upon location type
107 107 
  * @ret rc		Return status code
 
@@ -128,7 +128,7 @@ int vopen ( struct xfer_interface *xfer, int type, va_list args ) {
128 128 
 /**
129 129 
  * Open location
130 130 
  *
131 
- * @v xfer		Data-transfer interface
131 
+ * @v xfer		Data transfer interface
132 132 
  * @v type		Location type
133 133 
  * @v ...		Remaining arguments depend upon location type
134 134 
  * @ret rc		Return status code

+ 75
- 18
src/core/xfer.c View File 

@@ -26,10 +26,36 @@
26 26 
  *
27 27 
  */
28 28
29 
+/**
30 
+ * Close data transfer interface
31 
+ *
32 
+ * @v xfer		Data transfer interface
33 
+ * @v rc		Reason for close
34 
+ */
35 
+void close ( struct xfer_interface *xfer, int rc ) {
36 
+	struct xfer_interface *dest = xfer_dest ( xfer );
37 
+
38 
+	dest->op->close ( dest, rc );
39 
+	xfer_unplug ( xfer );
40 
+}
41 
+
42 
+/**
43 
+ * Seek to position
44 
+ *
45 
+ * @v xfer		Data transfer interface
46 
+ * @v pos		New position
47 
+ * @ret rc		Return status code
48 
+ */
49 
+int seek ( struct xfer_interface *xfer, size_t pos ) {
50 
+	struct xfer_interface *dest = xfer_dest ( xfer );
51 
+
52 
+	return dest->op->seek ( dest, pos );
53 
+}
54 
+
29 55 
 /**
30 56 
  * Send redirection event
31 57 
  *
32 
- * @v xfer		Data-transfer interface
58 
+ * @v xfer		Data transfer interface
33 59 
  * @v type		New location type
34 60 
  * @v args		Remaining arguments depend upon location type
35 61 
  * @ret rc		Return status code
 
@@ -43,7 +69,7 @@ int vredirect ( struct xfer_interface *xfer, int type, va_list args ) {
43 69 
 /**
44 70 
  * Send redirection event
45 71 
  *
46 
- * @v xfer		Data-transfer interface
72 
+ * @v xfer		Data transfer interface
47 73 
  * @v type		New location type
48 74 
  * @v ...		Remaining arguments depend upon location type
49 75 
  * @ret rc		Return status code
 
@@ -61,7 +87,7 @@ int redirect ( struct xfer_interface *xfer, int type, ... ) {
61 87 
 /**
62 88 
  * Deliver datagram
63 89 
  *
64 
- * @v xfer		Data-transfer interface
90 
+ * @v xfer		Data transfer interface
65 91 
  * @v iobuf		Datagram I/O buffer
66 92 
  * @ret rc		Return status code
67 93 
  */
 
@@ -74,7 +100,7 @@ int deliver ( struct xfer_interface *xfer, struct io_buffer *iobuf ) {
74 100 
 /**
75 101 
  * Deliver datagram as raw data
76 102 
  *
77 
- * @v xfer		Data-transfer interface
103 
+ * @v xfer		Data transfer interface
78 104 
  * @v iobuf		Datagram I/O buffer
79 105 
  * @ret rc		Return status code
80 106 
  */
 
@@ -93,10 +119,44 @@ int deliver_raw ( struct xfer_interface *xfer, const void *data, size_t len ) {
93 119 
  *
94 120 
  */
95 121
122 
+/**
123 
+ * Ignore close()
124 
+ *
125 
+ * @v xfer		Data transfer interface
126 
+ * @v rc		Reason for close
127 
+ */
128 
+void ignore_close ( struct xfer_interface *xfer __unused, int rc __unused ) {
129 
+	/* Nothing to do */
130 
+}
131 
+
132 
+/**
133 
+ * Ignore vredirect()
134 
+ *
135 
+ * @v xfer		Data transfer interface
136 
+ * @v type		New location type
137 
+ * @v args		Remaining arguments depend upon location type
138 
+ * @ret rc		Return status code
139 
+ */
140 
+int ignore_vredirect ( struct xfer_interface *xfer __unused,
141 
+		       int type __unused, va_list args __unused ) {
142 
+	return 0;
143 
+}
144 
+
145 
+/**
146 
+ * Ignore seek()
147 
+ *
148 
+ * @v xfer		Data transfer interface
149 
+ * @v pos		New position
150 
+ * @ret rc		Return status code
151 
+ */
152 
+int ignore_seek ( struct xfer_interface *xfer __unused, size_t pos __unused ) {
153 
+	return 0;
154 
+}
155 
+
96 156 
 /**
97 157 
  * Deliver datagram as raw data
98 158 
  *
99 
- * @v xfer		Data-transfer interface
159 
+ * @v xfer		Data transfer interface
100 160 
  * @v iobuf		Datagram I/O buffer
101 161 
  * @ret rc		Return status code
102 162 
  *
 
@@ -115,7 +175,7 @@ int deliver_as_raw ( struct xfer_interface *xfer,
115 175 
 /**
116 176 
  * Deliver datagram as I/O buffer
117 177 
  *
118 
- * @v xfer		Data-transfer interface
178 
+ * @v xfer		Data transfer interface
119 179 
  * @v data		Data buffer
120 180 
  * @v len		Length of data buffer
121 181 
  * @ret rc		Return status code
 
@@ -135,32 +195,29 @@ int deliver_as_iobuf ( struct xfer_interface *xfer,
135 195 
 	return xfer->op->deliver ( xfer, iobuf );
136 196 
 }
137 197
138 
-/****************************************************************************
139 
- *
140 
- * Null data transfer interface
141 
- *
142 
- */
143 
-
144 198 
 /**
145 
- * Null deliver datagram as raw data
199 
+ * Ignore datagram as raw data
146 200 
  *
147 
- * @v xfer		Data-transfer interface
201 
+ * @v xfer		Data transfer interface
148 202 
  * @v data		Data buffer
149 203 
  * @v len		Length of data buffer
150 204 
  * @ret rc		Return status code
151 205 
  */
152 
-static int null_deliver_raw ( struct xfer_interface *xfer,
153 
-			      const void *data __unused, size_t len ) {
206 
+int ignore_deliver_raw ( struct xfer_interface *xfer,
207 
+			 const void *data __unused, size_t len ) {
154 208 
 	DBGC ( xfer, "XFER %p %zd bytes delivered %s\n", xfer, len,
155 209 
 	       ( ( xfer == &null_xfer ) ?
156 210 
 		 "before connection" : "after termination" ) );
157 
-	return -EPIPE;
211 
+	return 0;
158 212 
 }
159 213
160 214 
 /** Null data transfer interface operations */
161 215 
 struct xfer_interface_operations null_xfer_ops = {
216 
+	.close		= ignore_close,
217 
+	.vredirect	= ignore_vredirect,
218 
+	.seek		= ignore_seek,
162 219 
 	.deliver	= deliver_as_raw,
163 
-	.deliver_raw	= null_deliver_raw,
220 
+	.deliver_raw	= ignore_deliver_raw,
164 221 
 };
165 222
166 223 
 /**

+ 2
- 2
src/include/gpxe/open.h View File 

@@ -41,7 +41,7 @@ struct uri_opener {
41 41 
 	const char *scheme;
42 42 
 	/** Open URI
43 43 
 	 *
44 
-	 * @v xfer		Data-transfer interface
44 
+	 * @v xfer		Data transfer interface
45 45 
 	 * @v uri		URI
46 46 
 	 * @ret rc		Return status code
47 47 
 	 *
 
@@ -62,7 +62,7 @@ struct socket_opener {
62 62 
 	int type;
63 63 
 	/** Open socket
64 64 
 	 *
65 
-	 * @v xfer		Data-transfer interface
65 
+	 * @v xfer		Data transfer interface
66 66 
 	 * @v sa		Socket address
67 67 
 	 * @ret rc		Return status code
68 68 
 	 */

+ 56
- 14
src/include/gpxe/xfer.h View File 

@@ -32,22 +32,29 @@ struct xfer_interface_operations {
32 32
33 33 
 	/** Close interface
34 34 
 	 *
35 
-	 * @v xfer		Data-transfer interface
35 
+	 * @v xfer		Data transfer interface
36 36 
 	 * @v rc		Reason for close
37 37 
 	 */
38 38 
 	void ( * close ) ( struct xfer_interface *xfer, int rc );
39 39 
 	/** Redirect to new location
40 40 
 	 *
41 
-	 * @v xfer		Data-transfer interface
41 
+	 * @v xfer		Data transfer interface
42 42 
 	 * @v type		New location type
43 43 
 	 * @v args		Remaining arguments depend upon location type
44 44 
 	 * @ret rc		Return status code
45 45 
 	 */
46 46 
 	int ( * vredirect ) ( struct xfer_interface *xfer, int type,
47 47 
 			      va_list args );
48 
+	/** Seek to position
49 
+	 *
50 
+	 * @v xfer		Data transfer interface
51 
+	 * @v pos		New position
52 
+	 * @ret rc		Return status code
53 
+	 */
54 
+	int ( * seek ) ( struct xfer_interface *xfer, size_t pos );
48 55 
 	/** Deliver datagram
49 56 
 	 *
50 
-	 * @v xfer		Data-transfer interface
57 
+	 * @v xfer		Data transfer interface
51 58 
 	 * @v iobuf		Datagram I/O buffer
52 59 
 	 * @ret rc		Return status code
53 60 
 	 *
 
@@ -59,7 +66,7 @@ struct xfer_interface_operations {
59 66 
 			    struct io_buffer *iobuf );
60 67 
 	/** Deliver datagram as raw data
61 68 
 	 *
62 
-	 * @v xfer		Data-transfer interface
69 
+	 * @v xfer		Data transfer interface
63 70 
 	 * @v data		Data buffer
64 71 
 	 * @v len		Length of data buffer
65 72 
 	 * @ret rc		Return status code
 
@@ -83,32 +90,67 @@ struct xfer_interface {
83 90 
 extern struct xfer_interface null_xfer;
84 91 
 extern struct xfer_interface_operations null_xfer_ops;
85 92
93 
+extern void close ( struct xfer_interface *xfer, int rc );
94 
+extern int seek ( struct xfer_interface *xfer, size_t pos );
86 95 
 extern int vredirect ( struct xfer_interface *xfer, int type, va_list args );
87 96 
 extern int redirect ( struct xfer_interface *xfer, int type, ... );
88 97 
 extern int deliver ( struct xfer_interface *xfer, struct io_buffer *iobuf );
89 98 
 extern int deliver_raw ( struct xfer_interface *xfer,
90 99 
 			 const void *data, size_t len );
91 100
101 
+extern void ignore_close ( struct xfer_interface *xfer, int rc );
102 
+extern int ignore_vredirect ( struct xfer_interface *xfer,
103 
+			      int type, va_list args );
104 
+extern int ignore_seek ( struct xfer_interface *xfer, size_t pos );
92 105 
 extern int deliver_as_raw ( struct xfer_interface *xfer,
93 106 
 			    struct io_buffer *iobuf );
94 107 
 extern int deliver_as_iobuf ( struct xfer_interface *xfer,
95 108 
 			      const void *data, size_t len );
109 
+extern int ignore_deliver_raw ( struct xfer_interface *xfer,
110 
+				const void *data __unused, size_t len );
111 
+
112 
+/**
113 
+ * Initialise a data transfer interface
114 
+ *
115 
+ * @v xfer		Data transfer interface
116 
+ * @v op		Data transfer interface operations
117 
+ * @v refcnt		Data transfer interface reference counting method
118 
+ */
119 
+static inline void xfer_init ( struct xfer_interface *xfer,
120 
+			       struct xfer_interface_operations *op,
121 
+			       void ( * refcnt ) ( struct interface *intf,
122 
+						   int delta ) ) {
123 
+	xfer->intf.dest = &null_xfer.intf;
124 
+	xfer->intf.refcnt = refcnt;
125 
+	xfer->op = op;
126 
+}
127 
+
128 
+/**
129 
+ * Get data transfer interface from generic object communication interface
130 
+ *
131 
+ * @v intf		Generic object communication interface
132 
+ * @ret xfer		Data transfer interface
133 
+ */
134 
+static inline struct xfer_interface *
135 
+intf_to_xfer ( struct interface *intf ) {
136 
+	return container_of ( intf, struct xfer_interface, intf );
137 
+}
96 138
97 139 
 /**
98 
- * Get destination data-transfer interface
140 
+ * Get destination data transfer interface
99 141 
  *
100 
- * @v xfer		Data-transfer interface
142 
+ * @v xfer		Data transfer interface
101 143 
  * @ret dest		Destination interface
102 144 
  */
103 145 
 static inline struct xfer_interface *
104 146 
 xfer_dest ( struct xfer_interface *xfer ) {
105 
-	return container_of ( xfer->intf.dest, struct xfer_interface, intf );
147 
+	return intf_to_xfer ( xfer->intf.dest );
106 148 
 }
107 149
108 150 
 /**
109 
- * Plug a data-transfer interface into a new destination interface
151 
+ * Plug a data transfer interface into a new destination interface
110 152 
  *
111 
- * @v xfer		Data-transfer interface
153 
+ * @v xfer		Data transfer interface
112 154 
  * @v dest		New destination interface
113 155 
  */
114 156 
 static inline void xfer_plug ( struct xfer_interface *xfer,
 
@@ -117,23 +159,23 @@ static inline void xfer_plug ( struct xfer_interface *xfer,
117 159 
 }
118 160
119 161 
 /**
120 
- * Unplug a data-transfer interface
162 
+ * Unplug a data transfer interface
121 163 
  *
122 
- * @v xfer		Data-transfer interface
164 
+ * @v xfer		Data transfer interface
123 165 
  */
124 166 
 static inline void xfer_unplug ( struct xfer_interface *xfer ) {
125 167 
 	plug ( &xfer->intf, &null_xfer.intf );
126 168 
 }
127 169
128 170 
 /**
129 
- * Terminate a data-transfer interface
171 
+ * Stop using a data transfer interface
130 172 
  *
131 
- * @v xfer		Data-transfer interface
173 
+ * @v xfer		Data transfer interface
132 174 
  *
133 175 
  * After calling this method, no further messages will be received via
134 176 
  * the interface.
135 177 
  */
136 
-static inline void xfer_terminate ( struct xfer_interface *xfer ) {
178 
+static inline void xfer_nullify ( struct xfer_interface *xfer ) {
137 179 
 	xfer->op = &null_xfer_ops;
138 180 
 };
139 181

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