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qeth: clean up error handling 

In the functions that are registering and unregistering MAC
addresses in the qeth-handled hardware, remove callback functions
that are unnesessary, as only the return code is analyzed.
Translate hardware response codes to semi-standard 'errno'-like
codes for readability.

Add kernel-doc description to the internal API function
qeth_send_control_data().

Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Reviewed-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eugene Crosser 2015-01-21 13:39:09 +01:00 committed by David S. Miller
parent b0a1ba5992
commit efbbc1d567
2 changed files with 122 additions and 111 deletions
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36
drivers/s390/net/qeth_core_main.c
View File

@ -2021,10 +2021,36 @@ void qeth_prepare_control_data(struct qeth_card *card, int len,
}
EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
/**
* qeth_send_control_data() - send control command to the card
* @card: qeth_card structure pointer
* @len: size of the command buffer
* @iob: qeth_cmd_buffer pointer
* @reply_cb: callback function pointer
* @cb_card: pointer to the qeth_card structure
* @cb_reply: pointer to the qeth_reply structure
* @cb_cmd: pointer to the original iob for non-IPA
* commands, or to the qeth_ipa_cmd structure
* for the IPA commands.
* @reply_param: private pointer passed to the callback
*
* Returns the value of the `return_code' field of the response
* block returned from the hardware, or other error indication.
* Value of zero indicates successful execution of the command.
*
* Callback function gets called one or more times, with cb_cmd
* pointing to the response returned by the hardware. Callback
* function must return non-zero if more reply blocks are expected,
* and zero if the last or only reply block is received. Callback
* function can get the value of the reply_param pointer from the
* field 'param' of the structure qeth_reply.
*/
int qeth_send_control_data(struct qeth_card *card, int len,
struct qeth_cmd_buffer *iob,
int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
unsigned long),
int (*reply_cb)(struct qeth_card *cb_card,
struct qeth_reply *cb_reply,
unsigned long cb_cmd),
void *reply_param)
{
int rc;
@ -2932,6 +2958,12 @@ void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
}
EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
/**
* qeth_send_ipa_cmd() - send an IPA command
*
* See qeth_send_control_data() for explanation of the arguments.
*/
int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
unsigned long),

197
drivers/s390/net/qeth_l2_main.c
View File

@ -27,10 +27,7 @@ static int qeth_l2_set_offline(struct ccwgroup_device *);
static int qeth_l2_stop(struct net_device *);
static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
enum qeth_ipa_cmds,
int (*reply_cb) (struct qeth_card *,
struct qeth_reply*,
unsigned long));
enum qeth_ipa_cmds);
static void qeth_l2_set_multicast_list(struct net_device *);
static int qeth_l2_recover(void *);
static void qeth_bridgeport_query_support(struct qeth_card *card);
@ -130,56 +127,68 @@ static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
return ndev;
}
static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
static int qeth_setdel_makerc(struct qeth_card *card, int retcode)
{
struct qeth_ipa_cmd *cmd;
__u8 *mac;
int rc;
QETH_CARD_TEXT(card, 2, "L2Sgmacb");
cmd = (struct qeth_ipa_cmd *) data;
mac = &cmd->data.setdelmac.mac[0];
/* MAC already registered, needed in couple/uncouple case */
if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) {
QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
mac, QETH_CARD_IFNAME(card));
cmd->hdr.return_code = 0;
if (retcode)
QETH_CARD_TEXT_(card, 2, "err%d", retcode);
switch (retcode) {
case IPA_RC_SUCCESS:
rc = 0;
break;
case IPA_RC_L2_UNSUPPORTED_CMD:
rc = -ENOSYS;
break;
case IPA_RC_L2_ADDR_TABLE_FULL:
rc = -ENOSPC;
break;
case IPA_RC_L2_DUP_MAC:
case IPA_RC_L2_DUP_LAYER3_MAC:
rc = -EEXIST;
break;
case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
rc = -EPERM;
break;
case IPA_RC_L2_MAC_NOT_FOUND:
rc = -ENOENT;
break;
default:
rc = -EIO;
break;
}
if (cmd->hdr.return_code)
QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
return 0;
return rc;
}
static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
{
int rc;
QETH_CARD_TEXT(card, 2, "L2Sgmac");
return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
qeth_l2_send_setgroupmac_cb);
}
static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd;
__u8 *mac;
QETH_CARD_TEXT(card, 2, "L2Dgmacb");
cmd = (struct qeth_ipa_cmd *) data;
mac = &cmd->data.setdelmac.mac[0];
if (cmd->hdr.return_code)
QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
return 0;
rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
IPA_CMD_SETGMAC));
if (rc == -EEXIST)
QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
mac, QETH_CARD_IFNAME(card));
else if (rc)
QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
mac, QETH_CARD_IFNAME(card), rc);
return rc;
}
static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
{
int rc;
QETH_CARD_TEXT(card, 2, "L2Dgmac");
return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
qeth_l2_send_delgroupmac_cb);
rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
IPA_CMD_DELGMAC));
if (rc)
QETH_DBF_MESSAGE(2,
"Could not delete group MAC %pM on %s: %d\n",
mac, QETH_CARD_IFNAME(card), rc);
return rc;
}
static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
@ -197,10 +206,11 @@ static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
mc->is_vmac = vmac;
if (vmac) {
rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
NULL);
rc = qeth_setdel_makerc(card,
qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC));
} else {
rc = qeth_l2_send_setgroupmac(card, mac);
rc = qeth_setdel_makerc(card,
qeth_l2_send_setgroupmac(card, mac));
}
if (!rc)
@ -218,7 +228,7 @@ static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
if (del) {
if (mc->is_vmac)
qeth_l2_send_setdelmac(card, mc->mc_addr,
IPA_CMD_DELVMAC, NULL);
IPA_CMD_DELVMAC);
else
qeth_l2_send_delgroupmac(card, mc->mc_addr);
}
@ -539,10 +549,7 @@ out:
}
static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
enum qeth_ipa_cmds ipacmd,
int (*reply_cb) (struct qeth_card *,
struct qeth_reply*,
unsigned long))
enum qeth_ipa_cmds ipacmd)
{
struct qeth_ipa_cmd *cmd;
struct qeth_cmd_buffer *iob;
@ -552,78 +559,50 @@ static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
}
static int qeth_l2_send_setmac_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "L2Smaccb");
cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code) {
QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
switch (cmd->hdr.return_code) {
case IPA_RC_L2_DUP_MAC:
case IPA_RC_L2_DUP_LAYER3_MAC:
dev_warn(&card->gdev->dev,
"MAC address %pM already exists\n",
cmd->data.setdelmac.mac);
break;
case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
dev_warn(&card->gdev->dev,
"MAC address %pM is not authorized\n",
cmd->data.setdelmac.mac);
break;
default:
break;
}
} else {
card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
OSA_ADDR_LEN);
dev_info(&card->gdev->dev,
"MAC address %pM successfully registered on device %s\n",
card->dev->dev_addr, card->dev->name);
}
return 0;
return qeth_send_ipa_cmd(card, iob, NULL, NULL);
}
static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
{
int rc;
QETH_CARD_TEXT(card, 2, "L2Setmac");
return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
qeth_l2_send_setmac_cb);
}
static int qeth_l2_send_delmac_cb(struct qeth_card *card,
struct qeth_reply *reply,
unsigned long data)
{
struct qeth_ipa_cmd *cmd;
QETH_CARD_TEXT(card, 2, "L2Dmaccb");
cmd = (struct qeth_ipa_cmd *) data;
if (cmd->hdr.return_code) {
QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
return 0;
rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
IPA_CMD_SETVMAC));
if (rc == 0) {
card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
dev_info(&card->gdev->dev,
"MAC address %pM successfully registered on device %s\n",
card->dev->dev_addr, card->dev->name);
} else {
card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
switch (rc) {
case -EEXIST:
dev_warn(&card->gdev->dev,
"MAC address %pM already exists\n", mac);
break;
case -EPERM:
dev_warn(&card->gdev->dev,
"MAC address %pM is not authorized\n", mac);
break;
}
}
card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
return 0;
return rc;
}
static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
{
int rc;
QETH_CARD_TEXT(card, 2, "L2Delmac");
if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
return 0;
return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
qeth_l2_send_delmac_cb);
rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
IPA_CMD_DELVMAC));
if (rc == 0)
card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
return rc;
}
static int qeth_l2_request_initial_mac(struct qeth_card *card)
@ -687,7 +666,7 @@ static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
return -ERESTARTSYS;
}
rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
if (!rc || (rc == IPA_RC_L2_MAC_NOT_FOUND))
if (!rc || (rc == -ENOENT))
rc = qeth_l2_send_setmac(card, addr->sa_data);
return rc ? -EINVAL : 0;
}