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net/smc: rework pnet table to support SMC-R failover 

The pnet table stored pnet ids in the smc device structures. When a
device is going down its smc device structure is freed, and when the
device is brought online again it no longer has a pnet id set.
Rework the pnet table implementation to store the device name with their
assigned pnet id and apply the pnet id to devices when they are
registered.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Graul 2020-04-29 17:10:37 +02:00 committed by David S. Miller
parent 21615efa6a
commit fdff704dc6
4 changed files with 322 additions and 233 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/smc/smc_ib.c
View File

@ -579,8 +579,9 @@ static void smc_ib_add_dev(struct ib_device *ibdev)
i++) {
set_bit(i, &smcibdev->port_event_mask);
/* determine pnetids of the port */
smc_pnetid_by_dev_port(ibdev->dev.parent, i,
smcibdev->pnetid[i]);
if (smc_pnetid_by_dev_port(ibdev->dev.parent, i,
smcibdev->pnetid[i]))
smc_pnetid_by_table_ib(smcibdev, i + 1);
}
schedule_work(&smcibdev->port_event_work);
}

3
net/smc/smc_ism.c
View File

@ -296,7 +296,8 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
device_initialize(&smcd->dev);
dev_set_name(&smcd->dev, name);
smcd->ops = ops;
smc_pnetid_by_dev_port(parent, 0, smcd->pnetid);
if (smc_pnetid_by_dev_port(parent, 0, smcd->pnetid))
smc_pnetid_by_table_smcd(smcd);
spin_lock_init(&smcd->lock);
spin_lock_init(&smcd->lgr_lock);

545
net/smc/smc_pnet.c
View File

@ -50,29 +50,26 @@ static struct nla_policy smc_pnet_policy[SMC_PNETID_MAX + 1] = {
static struct genl_family smc_pnet_nl_family;
/**
* struct smc_user_pnetentry - pnet identifier name entry for/from user
* @list: List node.
* @pnet_name: Pnet identifier name
* @ndev: pointer to network device.
* @smcibdev: Pointer to IB device.
* @ib_port: Port of IB device.
* @smcd_dev: Pointer to smcd device.
*/
struct smc_user_pnetentry {
struct list_head list;
char pnet_name[SMC_MAX_PNETID_LEN + 1];
struct net_device *ndev;
struct smc_ib_device *smcibdev;
u8 ib_port;
struct smcd_dev *smcd_dev;
enum smc_pnet_nametype {
SMC_PNET_ETH = 1,
SMC_PNET_IB = 2,
};
/* pnet entry stored in pnet table */
struct smc_pnetentry {
struct list_head list;
char pnet_name[SMC_MAX_PNETID_LEN + 1];
struct net_device *ndev;
enum smc_pnet_nametype type;
union {
struct {
char eth_name[IFNAMSIZ + 1];
struct net_device *ndev;
};
struct {
char ib_name[IB_DEVICE_NAME_MAX + 1];
u8 ib_port;
};
};
};
/* Check if two given pnetids match */
@ -106,14 +103,15 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
sn = net_generic(net, smc_net_id);
pnettable = &sn->pnettable;
/* remove netdevices */
/* remove table entry */
write_lock(&pnettable->lock);
list_for_each_entry_safe(pnetelem, tmp_pe, &pnettable->pnetlist,
list) {
if (!pnet_name ||
smc_pnet_match(pnetelem->pnet_name, pnet_name)) {
list_del(&pnetelem->list);
dev_put(pnetelem->ndev);
if (pnetelem->type == SMC_PNET_ETH && pnetelem->ndev)
dev_put(pnetelem->ndev);
kfree(pnetelem);
rc = 0;
}
@ -155,7 +153,35 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
return rc;
}
/* Remove a pnet entry mentioning a given network device from the pnet table.
/* Add the reference to a given network device to the pnet table.
*/
static int smc_pnet_add_by_ndev(struct net_device *ndev)
{
struct smc_pnetentry *pnetelem, *tmp_pe;
struct smc_pnettable *pnettable;
struct net *net = dev_net(ndev);
struct smc_net *sn;
int rc = -ENOENT;
/* get pnettable for namespace */
sn = net_generic(net, smc_net_id);
pnettable = &sn->pnettable;
write_lock(&pnettable->lock);
list_for_each_entry_safe(pnetelem, tmp_pe, &pnettable->pnetlist, list) {
if (pnetelem->type == SMC_PNET_ETH && !pnetelem->ndev &&
!strncmp(pnetelem->eth_name, ndev->name, IFNAMSIZ)) {
dev_hold(ndev);
pnetelem->ndev = ndev;
rc = 0;
break;
}
}
write_unlock(&pnettable->lock);
return rc;
}
/* Remove the reference to a given network device from the pnet table.
*/
static int smc_pnet_remove_by_ndev(struct net_device *ndev)
{
@ -171,10 +197,9 @@ static int smc_pnet_remove_by_ndev(struct net_device *ndev)
write_lock(&pnettable->lock);
list_for_each_entry_safe(pnetelem, tmp_pe, &pnettable->pnetlist, list) {
if (pnetelem->ndev == ndev) {
list_del(&pnetelem->list);
if (pnetelem->type == SMC_PNET_ETH && pnetelem->ndev == ndev) {
dev_put(pnetelem->ndev);
kfree(pnetelem);
pnetelem->ndev = NULL;
rc = 0;
break;
}
@ -183,80 +208,40 @@ static int smc_pnet_remove_by_ndev(struct net_device *ndev)
return rc;
}
/* Append a pnetid to the end of the pnet table if not already on this list.
/* Apply pnetid to ib device when no pnetid is set.
*/
static int smc_pnet_enter(struct smc_pnettable *pnettable,
struct smc_user_pnetentry *new_pnetelem)
static bool smc_pnet_apply_ib(struct smc_ib_device *ib_dev, u8 ib_port,
char *pnet_name)
{
u8 pnet_null[SMC_MAX_PNETID_LEN] = {0};
u8 ndev_pnetid[SMC_MAX_PNETID_LEN];
struct smc_pnetentry *tmp_pnetelem;
struct smc_pnetentry *pnetelem;
bool new_smcddev = false;
struct net_device *ndev;
bool new_netdev = true;
bool new_ibdev = false;
bool applied = false;
if (new_pnetelem->smcibdev) {
struct smc_ib_device *ib_dev = new_pnetelem->smcibdev;
int ib_port = new_pnetelem->ib_port;
spin_lock(&smc_ib_devices.lock);
if (smc_pnet_match(ib_dev->pnetid[ib_port - 1], pnet_null)) {
memcpy(ib_dev->pnetid[ib_port - 1],
new_pnetelem->pnet_name, SMC_MAX_PNETID_LEN);
ib_dev->pnetid_by_user[ib_port - 1] = true;
new_ibdev = true;
}
spin_unlock(&smc_ib_devices.lock);
spin_lock(&smc_ib_devices.lock);
if (smc_pnet_match(ib_dev->pnetid[ib_port - 1], pnet_null)) {
memcpy(ib_dev->pnetid[ib_port - 1], pnet_name,
SMC_MAX_PNETID_LEN);
ib_dev->pnetid_by_user[ib_port - 1] = true;
applied = true;
}
if (new_pnetelem->smcd_dev) {
struct smcd_dev *smcd_dev = new_pnetelem->smcd_dev;
spin_unlock(&smc_ib_devices.lock);
return applied;
}
spin_lock(&smcd_dev_list.lock);
if (smc_pnet_match(smcd_dev->pnetid, pnet_null)) {
memcpy(smcd_dev->pnetid, new_pnetelem->pnet_name,
SMC_MAX_PNETID_LEN);
smcd_dev->pnetid_by_user = true;
new_smcddev = true;
}
spin_unlock(&smcd_dev_list.lock);
/* Apply pnetid to smcd device when no pnetid is set.
*/
static bool smc_pnet_apply_smcd(struct smcd_dev *smcd_dev, char *pnet_name)
{
u8 pnet_null[SMC_MAX_PNETID_LEN] = {0};
bool applied = false;
spin_lock(&smcd_dev_list.lock);
if (smc_pnet_match(smcd_dev->pnetid, pnet_null)) {
memcpy(smcd_dev->pnetid, pnet_name, SMC_MAX_PNETID_LEN);
smcd_dev->pnetid_by_user = true;
applied = true;
}
if (!new_pnetelem->ndev)
return (new_ibdev || new_smcddev) ? 0 : -EEXIST;
/* check if (base) netdev already has a pnetid. If there is one, we do
* not want to add a pnet table entry
*/
ndev = pnet_find_base_ndev(new_pnetelem->ndev);
if (!smc_pnetid_by_dev_port(ndev->dev.parent, ndev->dev_port,
ndev_pnetid))
return (new_ibdev || new_smcddev) ? 0 : -EEXIST;
/* add a new netdev entry to the pnet table if there isn't one */
tmp_pnetelem = kzalloc(sizeof(*pnetelem), GFP_KERNEL);
if (!tmp_pnetelem)
return -ENOMEM;
memcpy(tmp_pnetelem->pnet_name, new_pnetelem->pnet_name,
SMC_MAX_PNETID_LEN);
tmp_pnetelem->ndev = new_pnetelem->ndev;
write_lock(&pnettable->lock);
list_for_each_entry(pnetelem, &pnettable->pnetlist, list) {
if (pnetelem->ndev == new_pnetelem->ndev)
new_netdev = false;
}
if (new_netdev) {
dev_hold(tmp_pnetelem->ndev);
list_add_tail(&tmp_pnetelem->list, &pnettable->pnetlist);
write_unlock(&pnettable->lock);
} else {
write_unlock(&pnettable->lock);
kfree(tmp_pnetelem);
}
return (new_netdev || new_ibdev || new_smcddev) ? 0 : -EEXIST;
spin_unlock(&smcd_dev_list.lock);
return applied;
}
/* The limit for pnetid is 16 characters.
@ -323,57 +308,167 @@ static struct smcd_dev *smc_pnet_find_smcd(char *smcd_name)
return smcd_dev;
}
/* Parse the supplied netlink attributes and fill a pnetentry structure.
* For ethernet and infiniband device names verify that the devices exist.
*/
static int smc_pnet_fill_entry(struct net *net,
struct smc_user_pnetentry *pnetelem,
struct nlattr *tb[])
static int smc_pnet_add_eth(struct smc_pnettable *pnettable, struct net *net,
char *eth_name, char *pnet_name)
{
char *string, *ibname;
struct smc_pnetentry *tmp_pe, *new_pe;
struct net_device *ndev, *base_ndev;
u8 ndev_pnetid[SMC_MAX_PNETID_LEN];
bool new_netdev;
int rc;
memset(pnetelem, 0, sizeof(*pnetelem));
INIT_LIST_HEAD(&pnetelem->list);
/* check if (base) netdev already has a pnetid. If there is one, we do
* not want to add a pnet table entry
*/
rc = -EEXIST;
ndev = dev_get_by_name(net, eth_name); /* dev_hold() */
if (ndev) {
base_ndev = pnet_find_base_ndev(ndev);
if (!smc_pnetid_by_dev_port(base_ndev->dev.parent,
base_ndev->dev_port, ndev_pnetid))
goto out_put;
}
/* add a new netdev entry to the pnet table if there isn't one */
rc = -ENOMEM;
new_pe = kzalloc(sizeof(*new_pe), GFP_KERNEL);
if (!new_pe)
goto out_put;
new_pe->type = SMC_PNET_ETH;
memcpy(new_pe->pnet_name, pnet_name, SMC_MAX_PNETID_LEN);
strncpy(new_pe->eth_name, eth_name, IFNAMSIZ);
new_pe->ndev = ndev;
rc = -EEXIST;
new_netdev = true;
write_lock(&pnettable->lock);
list_for_each_entry(tmp_pe, &pnettable->pnetlist, list) {
if (tmp_pe->type == SMC_PNET_ETH &&
!strncmp(tmp_pe->eth_name, eth_name, IFNAMSIZ)) {
new_netdev = false;
break;
}
}
if (new_netdev) {
list_add_tail(&new_pe->list, &pnettable->pnetlist);
write_unlock(&pnettable->lock);
} else {
write_unlock(&pnettable->lock);
kfree(new_pe);
goto out_put;
}
return 0;
out_put:
if (ndev)
dev_put(ndev);
return rc;
}
static int smc_pnet_add_ib(struct smc_pnettable *pnettable, char *ib_name,
u8 ib_port, char *pnet_name)
{
struct smc_pnetentry *tmp_pe, *new_pe;
struct smc_ib_device *ib_dev;
bool smcddev_applied = true;
bool ibdev_applied = true;
struct smcd_dev *smcd_dev;
bool new_ibdev;
/* try to apply the pnetid to active devices */
ib_dev = smc_pnet_find_ib(ib_name);
if (ib_dev)
ibdev_applied = smc_pnet_apply_ib(ib_dev, ib_port, pnet_name);
smcd_dev = smc_pnet_find_smcd(ib_name);
if (smcd_dev)
smcddev_applied = smc_pnet_apply_smcd(smcd_dev, pnet_name);
/* Apply fails when a device has a hardware-defined pnetid set, do not
* add a pnet table entry in that case.
*/
if (!ibdev_applied || !smcddev_applied)
return -EEXIST;
/* add a new ib entry to the pnet table if there isn't one */
new_pe = kzalloc(sizeof(*new_pe), GFP_KERNEL);
if (!new_pe)
return -ENOMEM;
new_pe->type = SMC_PNET_IB;
memcpy(new_pe->pnet_name, pnet_name, SMC_MAX_PNETID_LEN);
strncpy(new_pe->ib_name, ib_name, IB_DEVICE_NAME_MAX);
new_pe->ib_port = ib_port;
new_ibdev = true;
write_lock(&pnettable->lock);
list_for_each_entry(tmp_pe, &pnettable->pnetlist, list) {
if (tmp_pe->type == SMC_PNET_IB &&
!strncmp(tmp_pe->ib_name, ib_name, IB_DEVICE_NAME_MAX)) {
new_ibdev = false;
break;
}
}
if (new_ibdev) {
list_add_tail(&new_pe->list, &pnettable->pnetlist);
write_unlock(&pnettable->lock);
} else {
write_unlock(&pnettable->lock);
kfree(new_pe);
}
return (new_ibdev) ? 0 : -EEXIST;
}
/* Append a pnetid to the end of the pnet table if not already on this list.
*/
static int smc_pnet_enter(struct net *net, struct nlattr *tb[])
{
char pnet_name[SMC_MAX_PNETID_LEN + 1];
struct smc_pnettable *pnettable;
bool new_netdev = false;
bool new_ibdev = false;
struct smc_net *sn;
u8 ibport = 1;
char *string;
int rc;
/* get pnettable for namespace */
sn = net_generic(net, smc_net_id);
pnettable = &sn->pnettable;
rc = -EINVAL;
if (!tb[SMC_PNETID_NAME])
goto error;
string = (char *)nla_data(tb[SMC_PNETID_NAME]);
if (!smc_pnetid_valid(string, pnetelem->pnet_name))
if (!smc_pnetid_valid(string, pnet_name))
goto error;
rc = -EINVAL;
if (tb[SMC_PNETID_ETHNAME]) {
string = (char *)nla_data(tb[SMC_PNETID_ETHNAME]);
pnetelem->ndev = dev_get_by_name(net, string);
if (!pnetelem->ndev)
rc = smc_pnet_add_eth(pnettable, net, string, pnet_name);
if (!rc)
new_netdev = true;
else if (rc != -EEXIST)
goto error;
}
/* if this is not the initial namespace, stop here */
if (net != &init_net)
return 0;
return new_netdev ? 0 : -EEXIST;
rc = -EINVAL;
if (tb[SMC_PNETID_IBNAME]) {
ibname = (char *)nla_data(tb[SMC_PNETID_IBNAME]);
ibname = strim(ibname);
pnetelem->smcibdev = smc_pnet_find_ib(ibname);
pnetelem->smcd_dev = smc_pnet_find_smcd(ibname);
if (!pnetelem->smcibdev && !pnetelem->smcd_dev)
goto error;
if (pnetelem->smcibdev) {
if (!tb[SMC_PNETID_IBPORT])
goto error;
pnetelem->ib_port = nla_get_u8(tb[SMC_PNETID_IBPORT]);
if (pnetelem->ib_port < 1 ||
pnetelem->ib_port > SMC_MAX_PORTS)
string = (char *)nla_data(tb[SMC_PNETID_IBNAME]);
string = strim(string);
if (tb[SMC_PNETID_IBPORT]) {
ibport = nla_get_u8(tb[SMC_PNETID_IBPORT]);
if (ibport < 1 || ibport > SMC_MAX_PORTS)
goto error;
}
rc = smc_pnet_add_ib(pnettable, string, ibport, pnet_name);
if (!rc)
new_ibdev = true;
else if (rc != -EEXIST)
goto error;
}
return 0;
return (new_netdev || new_ibdev) ? 0 : -EEXIST;
error:
return rc;
@ -381,28 +476,22 @@ static int smc_pnet_fill_entry(struct net *net,
/* Convert an smc_pnetentry to a netlink attribute sequence */
static int smc_pnet_set_nla(struct sk_buff *msg,
struct smc_user_pnetentry *pnetelem)
struct smc_pnetentry *pnetelem)
{
if (nla_put_string(msg, SMC_PNETID_NAME, pnetelem->pnet_name))
return -1;
if (pnetelem->ndev) {
if (pnetelem->type == SMC_PNET_ETH) {
if (nla_put_string(msg, SMC_PNETID_ETHNAME,
pnetelem->ndev->name))
pnetelem->eth_name))
return -1;
} else {
if (nla_put_string(msg, SMC_PNETID_ETHNAME, "n/a"))
return -1;
}
if (pnetelem->smcibdev) {
if (nla_put_string(msg, SMC_PNETID_IBNAME,
dev_name(pnetelem->smcibdev->ibdev->dev.parent)) ||
if (pnetelem->type == SMC_PNET_IB) {
if (nla_put_string(msg, SMC_PNETID_IBNAME, pnetelem->ib_name) ||
nla_put_u8(msg, SMC_PNETID_IBPORT, pnetelem->ib_port))
return -1;
} else if (pnetelem->smcd_dev) {
if (nla_put_string(msg, SMC_PNETID_IBNAME,
dev_name(&pnetelem->smcd_dev->dev)) ||
nla_put_u8(msg, SMC_PNETID_IBPORT, 1))
return -1;
} else {
if (nla_put_string(msg, SMC_PNETID_IBNAME, "n/a") ||
nla_put_u8(msg, SMC_PNETID_IBPORT, 0xff))
@ -415,21 +504,8 @@ static int smc_pnet_set_nla(struct sk_buff *msg,
static int smc_pnet_add(struct sk_buff *skb, struct genl_info *info)
{
struct net *net = genl_info_net(info);
struct smc_user_pnetentry pnetelem;
struct smc_pnettable *pnettable;
struct smc_net *sn;
int rc;
/* get pnettable for namespace */
sn = net_generic(net, smc_net_id);
pnettable = &sn->pnettable;
rc = smc_pnet_fill_entry(net, &pnetelem, info->attrs);
if (!rc)
rc = smc_pnet_enter(pnettable, &pnetelem);
if (pnetelem.ndev)
dev_put(pnetelem.ndev);
return rc;
return smc_pnet_enter(net, info->attrs);
}
static int smc_pnet_del(struct sk_buff *skb, struct genl_info *info)
@ -450,7 +526,7 @@ static int smc_pnet_dump_start(struct netlink_callback *cb)
static int smc_pnet_dumpinfo(struct sk_buff *skb,
u32 portid, u32 seq, u32 flags,
struct smc_user_pnetentry *pnetelem)
struct smc_pnetentry *pnetelem)
{
void *hdr;
@ -469,91 +545,32 @@ static int smc_pnet_dumpinfo(struct sk_buff *skb,
static int _smc_pnet_dump(struct net *net, struct sk_buff *skb, u32 portid,
u32 seq, u8 *pnetid, int start_idx)
{
struct smc_user_pnetentry tmp_entry;
struct smc_pnettable *pnettable;
struct smc_pnetentry *pnetelem;
struct smc_ib_device *ibdev;
struct smcd_dev *smcd_dev;
struct smc_net *sn;
int idx = 0;
int ibport;
/* get pnettable for namespace */
sn = net_generic(net, smc_net_id);
pnettable = &sn->pnettable;
/* dump netdevices */
/* dump pnettable entries */
read_lock(&pnettable->lock);
list_for_each_entry(pnetelem, &pnettable->pnetlist, list) {
if (pnetid && !smc_pnet_match(pnetelem->pnet_name, pnetid))
continue;
if (idx++ < start_idx)
continue;
memset(&tmp_entry, 0, sizeof(tmp_entry));
memcpy(&tmp_entry.pnet_name, pnetelem->pnet_name,
SMC_MAX_PNETID_LEN);
tmp_entry.ndev = pnetelem->ndev;
/* if this is not the initial namespace, dump only netdev */
if (net != &init_net && pnetelem->type != SMC_PNET_ETH)
continue;
if (smc_pnet_dumpinfo(skb, portid, seq, NLM_F_MULTI,
&tmp_entry)) {
pnetelem)) {
--idx;
break;
}
}
read_unlock(&pnettable->lock);
/* if this is not the initial namespace, stop here */
if (net != &init_net)
return idx;
/* dump ib devices */
spin_lock(&smc_ib_devices.lock);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
for (ibport = 0; ibport < SMC_MAX_PORTS; ibport++) {
if (ibdev->pnetid_by_user[ibport]) {
if (pnetid &&
!smc_pnet_match(ibdev->pnetid[ibport],
pnetid))
continue;
if (idx++ < start_idx)
continue;
memset(&tmp_entry, 0, sizeof(tmp_entry));
memcpy(&tmp_entry.pnet_name,
ibdev->pnetid[ibport],
SMC_MAX_PNETID_LEN);
tmp_entry.smcibdev = ibdev;
tmp_entry.ib_port = ibport + 1;
if (smc_pnet_dumpinfo(skb, portid, seq,
NLM_F_MULTI,
&tmp_entry)) {
--idx;
break;
}
}
}
}
spin_unlock(&smc_ib_devices.lock);
/* dump smcd devices */
spin_lock(&smcd_dev_list.lock);
list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) {
if (smcd_dev->pnetid_by_user) {
if (pnetid && !smc_pnet_match(smcd_dev->pnetid, pnetid))
continue;
if (idx++ < start_idx)
continue;
memset(&tmp_entry, 0, sizeof(tmp_entry));
memcpy(&tmp_entry.pnet_name, smcd_dev->pnetid,
SMC_MAX_PNETID_LEN);
tmp_entry.smcd_dev = smcd_dev;
if (smc_pnet_dumpinfo(skb, portid, seq, NLM_F_MULTI,
&tmp_entry)) {
--idx;
break;
}
}
}
spin_unlock(&smcd_dev_list.lock);
return idx;
}
@ -659,6 +676,9 @@ static int smc_pnet_netdev_event(struct notifier_block *this,
case NETDEV_UNREGISTER:
smc_pnet_remove_by_ndev(event_dev);
return NOTIFY_OK;
case NETDEV_REGISTER:
smc_pnet_add_by_ndev(event_dev);
return NOTIFY_OK;
default:
return NOTIFY_DONE;
}
@ -744,7 +764,7 @@ static int smc_pnet_find_ndev_pnetid_by_table(struct net_device *ndev,
read_lock(&pnettable->lock);
list_for_each_entry(pnetelem, &pnettable->pnetlist, list) {
if (ndev == pnetelem->ndev) {
if (pnetelem->type == SMC_PNET_ETH && ndev == pnetelem->ndev) {
/* get pnetid of netdev device */
memcpy(pnetid, pnetelem->pnet_name, SMC_MAX_PNETID_LEN);
rc = 0;
@ -755,6 +775,34 @@ static int smc_pnet_find_ndev_pnetid_by_table(struct net_device *ndev,
return rc;
}
/* find a roce device for the given pnetid */
static void _smc_pnet_find_roce_by_pnetid(u8 *pnet_id,
struct smc_init_info *ini)
{
struct smc_ib_device *ibdev;
int i;
ini->ib_dev = NULL;
spin_lock(&smc_ib_devices.lock);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
for (i = 1; i <= SMC_MAX_PORTS; i++) {
if (!rdma_is_port_valid(ibdev->ibdev, i))
continue;
if (smc_pnet_match(ibdev->pnetid[i - 1], pnet_id) &&
smc_ib_port_active(ibdev, i) &&
!test_bit(i - 1, ibdev->ports_going_away) &&
!smc_ib_determine_gid(ibdev, i, ini->vlan_id,
ini->ib_gid, NULL)) {
ini->ib_dev = ibdev;
ini->ib_port = i;
goto out;
}
}
}
out:
spin_unlock(&smc_ib_devices.lock);
}
/* if handshake network device belongs to a roce device, return its
* IB device and port
*/
@ -801,8 +849,6 @@ static void smc_pnet_find_roce_by_pnetid(struct net_device *ndev,
struct smc_init_info *ini)
{
u8 ndev_pnetid[SMC_MAX_PNETID_LEN];
struct smc_ib_device *ibdev;
int i;
ndev = pnet_find_base_ndev(ndev);
if (smc_pnetid_by_dev_port(ndev->dev.parent, ndev->dev_port,
@ -811,25 +857,7 @@ static void smc_pnet_find_roce_by_pnetid(struct net_device *ndev,
smc_pnet_find_rdma_dev(ndev, ini);
return; /* pnetid could not be determined */
}
spin_lock(&smc_ib_devices.lock);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
for (i = 1; i <= SMC_MAX_PORTS; i++) {
if (!rdma_is_port_valid(ibdev->ibdev, i))
continue;
if (smc_pnet_match(ibdev->pnetid[i - 1], ndev_pnetid) &&
smc_ib_port_active(ibdev, i) &&
!test_bit(i - 1, ibdev->ports_going_away) &&
!smc_ib_determine_gid(ibdev, i, ini->vlan_id,
ini->ib_gid, NULL)) {
ini->ib_dev = ibdev;
ini->ib_port = i;
goto out;
}
}
}
out:
spin_unlock(&smc_ib_devices.lock);
_smc_pnet_find_roce_by_pnetid(ndev_pnetid, ini);
}
static void smc_pnet_find_ism_by_pnetid(struct net_device *ndev,
@ -895,3 +923,60 @@ void smc_pnet_find_ism_resource(struct sock *sk, struct smc_init_info *ini)
out:
return;
}
/* Lookup and apply a pnet table entry to the given ib device.
*/
int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port)
{
char *ib_name = smcibdev->ibdev->name;
struct smc_pnettable *pnettable;
struct smc_pnetentry *tmp_pe;
struct smc_net *sn;
int rc = -ENOENT;
/* get pnettable for init namespace */
sn = net_generic(&init_net, smc_net_id);
pnettable = &sn->pnettable;
read_lock(&pnettable->lock);
list_for_each_entry(tmp_pe, &pnettable->pnetlist, list) {
if (tmp_pe->type == SMC_PNET_IB &&
!strncmp(tmp_pe->ib_name, ib_name, IB_DEVICE_NAME_MAX) &&
tmp_pe->ib_port == ib_port) {
smc_pnet_apply_ib(smcibdev, ib_port, tmp_pe->pnet_name);
rc = 0;
break;
}
}
read_unlock(&pnettable->lock);
return rc;
}
/* Lookup and apply a pnet table entry to the given smcd device.
*/
int smc_pnetid_by_table_smcd(struct smcd_dev *smcddev)
{
const char *ib_name = dev_name(&smcddev->dev);
struct smc_pnettable *pnettable;
struct smc_pnetentry *tmp_pe;
struct smc_net *sn;
int rc = -ENOENT;
/* get pnettable for init namespace */
sn = net_generic(&init_net, smc_net_id);
pnettable = &sn->pnettable;
read_lock(&pnettable->lock);
list_for_each_entry(tmp_pe, &pnettable->pnetlist, list) {
if (tmp_pe->type == SMC_PNET_IB &&
!strncmp(tmp_pe->ib_name, ib_name, IB_DEVICE_NAME_MAX)) {
smc_pnet_apply_smcd(smcddev, tmp_pe->pnet_name);
rc = 0;
break;
}
}
read_unlock(&pnettable->lock);
return rc;
}

2
net/smc/smc_pnet.h
View File

@ -46,5 +46,7 @@ void smc_pnet_exit(void);
void smc_pnet_net_exit(struct net *net);
void smc_pnet_find_roce_resource(struct sock *sk, struct smc_init_info *ini);
void smc_pnet_find_ism_resource(struct sock *sk, struct smc_init_info *ini);
int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port);
int smc_pnetid_by_table_smcd(struct smcd_dev *smcd);
#endif