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Subject[PATCH 3/3] usbip: tools: change to use new error codes in server reply messages
Date
Changed usbip_network, usbip_attach, usbip_list, and usbipd to use
and propagate the new error codes in server reply messages.

usbip_net_recv_op_common() is changed to take a pointer to status
return the status returned in the op_common.status to callers.

usbip_attach and usbip_list use the common interface to print error
messages to indicate why the request failed.

With this change the messages say why a request failed:

- when a client requests a device that is already exported:

usbip attach -r server_name -b 3-10.2
usbip: error: Attach Request for 3-10.2 failed - Device busy (exported)

- when a client requests a device that isn't exportable,

usbip attach -r server_name -b 3-10.4
usbip: error: Attach Request for 3-10.4 failed - Device not found

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
---
tools/usb/usbip/src/usbip_attach.c | 11 +++++------
tools/usb/usbip/src/usbip_list.c | 6 ++++--
tools/usb/usbip/src/usbip_network.c | 6 +++++-
tools/usb/usbip/src/usbip_network.h | 2 +-
tools/usb/usbip/src/usbipd.c | 18 +++++++++---------
5 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/tools/usb/usbip/src/usbip_attach.c b/tools/usb/usbip/src/usbip_attach.c
index f60738735398..ba88728483ff 100644
--- a/tools/usb/usbip/src/usbip_attach.c
+++ b/tools/usb/usbip/src/usbip_attach.c
@@ -135,6 +135,7 @@ static int query_import_device(int sockfd, char *busid)
struct op_import_request request;
struct op_import_reply reply;
uint16_t code = OP_REP_IMPORT;
+ int status;

memset(&request, 0, sizeof(request));
memset(&reply, 0, sizeof(reply));
@@ -157,9 +158,10 @@ static int query_import_device(int sockfd, char *busid)
}

/* receive a reply */
- rc = usbip_net_recv_op_common(sockfd, &code);
+ rc = usbip_net_recv_op_common(sockfd, &code, &status);
if (rc < 0) {
- err("recv op_common");
+ err("Attach Request for %s failed - %s\n",
+ busid, usbip_op_common_status_string(status));
return -1;
}

@@ -194,11 +196,8 @@ static int attach_device(char *host, char *busid)
}

rhport = query_import_device(sockfd, busid);
- if (rhport < 0) {
- err("Attach request for Device %s. Is this device exported?",
- busid);
+ if (rhport < 0)
return -1;
- }

close(sockfd);

diff --git a/tools/usb/usbip/src/usbip_list.c b/tools/usb/usbip/src/usbip_list.c
index d65a9f444174..8d4ccf4b9480 100644
--- a/tools/usb/usbip/src/usbip_list.c
+++ b/tools/usb/usbip/src/usbip_list.c
@@ -62,6 +62,7 @@ static int get_exported_devices(char *host, int sockfd)
struct usbip_usb_interface uintf;
unsigned int i;
int rc, j;
+ int status;

rc = usbip_net_send_op_common(sockfd, OP_REQ_DEVLIST, 0);
if (rc < 0) {
@@ -69,9 +70,10 @@ static int get_exported_devices(char *host, int sockfd)
return -1;
}

- rc = usbip_net_recv_op_common(sockfd, &code);
+ rc = usbip_net_recv_op_common(sockfd, &code, &status);
if (rc < 0) {
- dbg("usbip_net_recv_op_common failed");
+ err("Exported Device List Request failed - %s\n",
+ usbip_op_common_status_string(status));
return -1;
}

diff --git a/tools/usb/usbip/src/usbip_network.c b/tools/usb/usbip/src/usbip_network.c
index 90325fa8bc38..8ffcd47d9638 100644
--- a/tools/usb/usbip/src/usbip_network.c
+++ b/tools/usb/usbip/src/usbip_network.c
@@ -163,7 +163,7 @@ int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status)
return 0;
}

-int usbip_net_recv_op_common(int sockfd, uint16_t *code)
+int usbip_net_recv_op_common(int sockfd, uint16_t *code, int *status)
{
struct op_common op_common;
int rc;
@@ -191,10 +191,14 @@ int usbip_net_recv_op_common(int sockfd, uint16_t *code)
if (op_common.code != *code) {
dbg("unexpected pdu %#0x for %#0x", op_common.code,
*code);
+ /* return error status */
+ *status = ST_ERROR;
goto err;
}
}

+ *status = op_common.status;
+
if (op_common.status != ST_OK) {
dbg("request failed at peer: %d", op_common.status);
goto err;
diff --git a/tools/usb/usbip/src/usbip_network.h b/tools/usb/usbip/src/usbip_network.h
index b6a2f9be888c..555215eae43e 100644
--- a/tools/usb/usbip/src/usbip_network.h
+++ b/tools/usb/usbip/src/usbip_network.h
@@ -174,7 +174,7 @@ void usbip_net_pack_usb_interface(int pack, struct usbip_usb_interface *uinf);
ssize_t usbip_net_recv(int sockfd, void *buff, size_t bufflen);
ssize_t usbip_net_send(int sockfd, void *buff, size_t bufflen);
int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status);
-int usbip_net_recv_op_common(int sockfd, uint16_t *code);
+int usbip_net_recv_op_common(int sockfd, uint16_t *code, int *status);
int usbip_net_set_reuseaddr(int sockfd);
int usbip_net_set_nodelay(int sockfd);
int usbip_net_set_keepalive(int sockfd);
diff --git a/tools/usb/usbip/src/usbipd.c b/tools/usb/usbip/src/usbipd.c
index c6dad2a13c80..f8ff735eb100 100644
--- a/tools/usb/usbip/src/usbipd.c
+++ b/tools/usb/usbip/src/usbipd.c
@@ -107,7 +107,7 @@ static int recv_request_import(int sockfd)
struct usbip_usb_device pdu_udev;
struct list_head *i;
int found = 0;
- int error = 0;
+ int status = ST_OK;
int rc;

memset(&req, 0, sizeof(req));
@@ -133,22 +133,21 @@ static int recv_request_import(int sockfd)
usbip_net_set_nodelay(sockfd);

/* export device needs a TCP/IP socket descriptor */
- rc = usbip_export_device(edev, sockfd);
- if (rc < 0)
- error = 1;
+ status = usbip_export_device(edev, sockfd);
+ if (status < 0)
+ status = ST_NA;
} else {
info("requested device not found: %s", req.busid);
- error = 1;
+ status = ST_NODEV;
}

- rc = usbip_net_send_op_common(sockfd, OP_REP_IMPORT,
- (!error ? ST_OK : ST_NA));
+ rc = usbip_net_send_op_common(sockfd, OP_REP_IMPORT, status);
if (rc < 0) {
dbg("usbip_net_send_op_common failed: %#0x", OP_REP_IMPORT);
return -1;
}

- if (error) {
+ if (status) {
dbg("import request busid %s: failed", req.busid);
return -1;
}
@@ -251,8 +250,9 @@ static int recv_pdu(int connfd)
{
uint16_t code = OP_UNSPEC;
int ret;
+ int status;

- ret = usbip_net_recv_op_common(connfd, &code);
+ ret = usbip_net_recv_op_common(connfd, &code, &status);
if (ret < 0) {
dbg("could not receive opcode: %#0x", code);
return -1;
--
2.14.1
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