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Subject[PATCH 1/3] usbip: tools: add more error codes for usbip request/reply messages
Date
Currently ST_OK and ST_NA are the only values defined to communicate
status of a request from a client. Add more error codes to clearly
indicate what failed. For example, when client sends request to import
a device that isn't export-able, server can send a specific error code
to the client.

Existing defines are moved to a common header in libsrc to be included
in the libusbip_la-usbip_common.o to be used by all the usbip tools.
Supporting interface to print error strings is added to the common lib.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/usb/usbip/libsrc/usbip_common.c | 23 +++++++++++++++++++++++
tools/usb/usbip/libsrc/usbip_common.h | 11 +++++++++++
tools/usb/usbip/src/usbip_network.h | 4 +---
3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/tools/usb/usbip/libsrc/usbip_common.c b/tools/usb/usbip/libsrc/usbip_common.c
index 001bb8e8f668..bb424638d75b 100644
--- a/tools/usb/usbip/libsrc/usbip_common.c
+++ b/tools/usb/usbip/libsrc/usbip_common.c
@@ -66,6 +66,29 @@ const char *usbip_speed_string(int num)
return "Unknown Speed";
}

+struct op_common_status_string {
+ int num;
+ char *desc;
+};
+
+static struct op_common_status_string op_common_status_strings[] = {
+ { ST_OK, "Request Completed Successfully" },
+ { ST_NA, "Request Failed" },
+ { ST_DEV_BUSY, "Device busy (exported)" },
+ { ST_DEV_ERR, "Device in error state" },
+ { ST_NODEV, "Device not found" },
+ { ST_ERROR, "Unexpected response" },
+ { 0, NULL}
+};
+
+const char *usbip_op_common_status_string(int status)
+{
+ for (int i = 0; op_common_status_strings[i].desc != NULL; i++)
+ if (op_common_status_strings[i].num == status)
+ return op_common_status_strings[i].desc;
+
+ return "Unknown Op Common Status";
+}

#define DBG_UDEV_INTEGER(name)\
dbg("%-20s = %x", to_string(name), (int) udev->name)
diff --git a/tools/usb/usbip/libsrc/usbip_common.h b/tools/usb/usbip/libsrc/usbip_common.h
index e45ec9d2fdbc..73a367a7fa10 100644
--- a/tools/usb/usbip/libsrc/usbip_common.h
+++ b/tools/usb/usbip/libsrc/usbip_common.h
@@ -43,6 +43,16 @@
#define SYSFS_PATH_MAX 256
#define SYSFS_BUS_ID_SIZE 32

+/* Defines for op_code status in server/client op_common PDUs */
+#define ST_OK 0x00
+#define ST_NA 0x01
+ /* Device requested for import is not available */
+#define ST_DEV_BUSY 0x02
+ /* Device requested for import is in error state */
+#define ST_DEV_ERR 0x03
+#define ST_NODEV 0x04
+#define ST_ERROR 0x05
+
extern int usbip_use_syslog;
extern int usbip_use_stderr;
extern int usbip_use_debug ;
@@ -130,6 +140,7 @@ int read_usb_interface(struct usbip_usb_device *udev, int i,

const char *usbip_speed_string(int num);
const char *usbip_status_string(int32_t status);
+const char *usbip_op_common_status_string(int status);

int usbip_names_init(char *);
void usbip_names_free(void);
diff --git a/tools/usb/usbip/src/usbip_network.h b/tools/usb/usbip/src/usbip_network.h
index 7032687621d3..b6a2f9be888c 100644
--- a/tools/usb/usbip/src/usbip_network.h
+++ b/tools/usb/usbip/src/usbip_network.h
@@ -27,9 +27,7 @@ struct op_common {
#define OP_REPLY (0x00 << 8)
uint16_t code;

- /* add more error code */
-#define ST_OK 0x00
-#define ST_NA 0x01
+ /* status codes defined in usbip_common.h */
uint32_t status; /* op_code status (for reply) */

} __attribute__((packed));
--
2.14.1
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