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Diffstat (limited to 'net/smc/smc_pnet.c')
-rw-r--r--net/smc/smc_pnet.c145
1 files changed, 102 insertions, 43 deletions
diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index 5497a8b44287..878f5c085444 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -20,6 +20,9 @@
#include <rdma/ib_verbs.h>
+#include <net/netns/generic.h>
+#include "smc_netns.h"
+
#include "smc_pnet.h"
#include "smc_ib.h"
#include "smc_ism.h"
@@ -47,19 +50,6 @@ static struct nla_policy smc_pnet_policy[SMC_PNETID_MAX + 1] = {
static struct genl_family smc_pnet_nl_family;
/**
- * struct smc_pnettable - SMC PNET table anchor
- * @lock: Lock for list action
- * @pnetlist: List of PNETIDs
- */
-static struct smc_pnettable {
- rwlock_t lock;
- struct list_head pnetlist;
-} smc_pnettable = {
- .pnetlist = LIST_HEAD_INIT(smc_pnettable.pnetlist),
- .lock = __RW_LOCK_UNLOCKED(smc_pnettable.lock)
-};
-
-/**
* struct smc_user_pnetentry - pnet identifier name entry for/from user
* @list: List node.
* @pnet_name: Pnet identifier name
@@ -101,17 +91,23 @@ static bool smc_pnet_match(u8 *pnetid1, u8 *pnetid2)
/* Remove a pnetid from the pnet table.
*/
-static int smc_pnet_remove_by_pnetid(char *pnet_name)
+static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
{
struct smc_pnetentry *pnetelem, *tmp_pe;
+ struct smc_pnettable *pnettable;
struct smc_ib_device *ibdev;
struct smcd_dev *smcd_dev;
+ struct smc_net *sn;
int rc = -ENOENT;
int ibport;
+ /* get pnettable for namespace */
+ sn = net_generic(net, smc_net_id);
+ pnettable = &sn->pnettable;
+
/* remove netdevices */
- write_lock(&smc_pnettable.lock);
- list_for_each_entry_safe(pnetelem, tmp_pe, &smc_pnettable.pnetlist,
+ 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)) {
@@ -121,7 +117,12 @@ static int smc_pnet_remove_by_pnetid(char *pnet_name)
rc = 0;
}
}
- write_unlock(&smc_pnettable.lock);
+ write_unlock(&pnettable->lock);
+
+ /* if this is not the initial namespace, stop here */
+ if (net != &init_net)
+ return rc;
+
/* remove ib devices */
spin_lock(&smc_ib_devices.lock);
list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
@@ -158,11 +159,17 @@ static int smc_pnet_remove_by_pnetid(char *pnet_name)
static int smc_pnet_remove_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;
- write_lock(&smc_pnettable.lock);
- list_for_each_entry_safe(pnetelem, tmp_pe, &smc_pnettable.pnetlist,
- list) {
+ /* 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->ndev == ndev) {
list_del(&pnetelem->list);
dev_put(pnetelem->ndev);
@@ -171,13 +178,14 @@ static int smc_pnet_remove_by_ndev(struct net_device *ndev)
break;
}
}
- write_unlock(&smc_pnettable.lock);
+ write_unlock(&pnettable->lock);
return rc;
}
/* Append a pnetid to the end of the pnet table if not already on this list.
*/
-static int smc_pnet_enter(struct smc_user_pnetentry *new_pnetelem)
+static int smc_pnet_enter(struct smc_pnettable *pnettable,
+ struct smc_user_pnetentry *new_pnetelem)
{
u8 pnet_null[SMC_MAX_PNETID_LEN] = {0};
u8 ndev_pnetid[SMC_MAX_PNETID_LEN];
@@ -233,17 +241,17 @@ static int smc_pnet_enter(struct smc_user_pnetentry *new_pnetelem)
SMC_MAX_PNETID_LEN);
tmp_pnetelem->ndev = new_pnetelem->ndev;
- write_lock(&smc_pnettable.lock);
- list_for_each_entry(pnetelem, &smc_pnettable.pnetlist, list) {
+ 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, &smc_pnettable.pnetlist);
- write_unlock(&smc_pnettable.lock);
+ list_add_tail(&tmp_pnetelem->list, &pnettable->pnetlist);
+ write_unlock(&pnettable->lock);
} else {
- write_unlock(&smc_pnettable.lock);
+ write_unlock(&pnettable->lock);
kfree(tmp_pnetelem);
}
@@ -340,6 +348,10 @@ static int smc_pnet_fill_entry(struct net *net,
goto error;
}
+ /* if this is not the initial namespace, stop here */
+ if (net != &init_net)
+ return 0;
+
rc = -EINVAL;
if (tb[SMC_PNETID_IBNAME]) {
ibname = (char *)nla_data(tb[SMC_PNETID_IBNAME]);
@@ -403,11 +415,17 @@ 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(&pnetelem);
+ rc = smc_pnet_enter(pnettable, &pnetelem);
if (pnetelem.ndev)
dev_put(pnetelem.ndev);
return rc;
@@ -415,9 +433,11 @@ static int smc_pnet_add(struct sk_buff *skb, struct genl_info *info)
static int smc_pnet_del(struct sk_buff *skb, struct genl_info *info)
{
+ struct net *net = genl_info_net(info);
+
if (!info->attrs[SMC_PNETID_NAME])
return -EINVAL;
- return smc_pnet_remove_by_pnetid(
+ return smc_pnet_remove_by_pnetid(net,
(char *)nla_data(info->attrs[SMC_PNETID_NAME]));
}
@@ -445,19 +465,25 @@ static int smc_pnet_dumpinfo(struct sk_buff *skb,
return 0;
}
-static int _smc_pnet_dump(struct sk_buff *skb, u32 portid, u32 seq, u8 *pnetid,
- int start_idx)
+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 */
- read_lock(&smc_pnettable.lock);
- list_for_each_entry(pnetelem, &smc_pnettable.pnetlist, list) {
+ 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)
@@ -472,7 +498,11 @@ static int _smc_pnet_dump(struct sk_buff *skb, u32 portid, u32 seq, u8 *pnetid,
break;
}
}
- read_unlock(&smc_pnettable.lock);
+ 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);
@@ -528,9 +558,10 @@ static int _smc_pnet_dump(struct sk_buff *skb, u32 portid, u32 seq, u8 *pnetid,
static int smc_pnet_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct net *net = sock_net(skb->sk);
int idx;
- idx = _smc_pnet_dump(skb, NETLINK_CB(cb->skb).portid,
+ idx = _smc_pnet_dump(net, skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NULL, cb->args[0]);
cb->args[0] = idx;
@@ -540,6 +571,7 @@ static int smc_pnet_dump(struct sk_buff *skb, struct netlink_callback *cb)
/* Retrieve one PNETID entry */
static int smc_pnet_get(struct sk_buff *skb, struct genl_info *info)
{
+ struct net *net = genl_info_net(info);
struct sk_buff *msg;
void *hdr;
@@ -550,7 +582,7 @@ static int smc_pnet_get(struct sk_buff *skb, struct genl_info *info)
if (!msg)
return -ENOMEM;
- _smc_pnet_dump(msg, info->snd_portid, info->snd_seq,
+ _smc_pnet_dump(net, msg, info->snd_portid, info->snd_seq,
nla_data(info->attrs[SMC_PNETID_NAME]), 0);
/* finish multi part message and send it */
@@ -567,7 +599,9 @@ static int smc_pnet_get(struct sk_buff *skb, struct genl_info *info)
*/
static int smc_pnet_flush(struct sk_buff *skb, struct genl_info *info)
{
- return smc_pnet_remove_by_pnetid(NULL);
+ struct net *net = genl_info_net(info);
+
+ return smc_pnet_remove_by_pnetid(net, NULL);
}
/* SMC_PNETID generic netlink operation definition */
@@ -631,6 +665,18 @@ static struct notifier_block smc_netdev_notifier = {
.notifier_call = smc_pnet_netdev_event
};
+/* init network namespace */
+int smc_pnet_net_init(struct net *net)
+{
+ struct smc_net *sn = net_generic(net, smc_net_id);
+ struct smc_pnettable *pnettable = &sn->pnettable;
+
+ INIT_LIST_HEAD(&pnettable->pnetlist);
+ rwlock_init(&pnettable->lock);
+
+ return 0;
+}
+
int __init smc_pnet_init(void)
{
int rc;
@@ -644,9 +690,15 @@ int __init smc_pnet_init(void)
return rc;
}
+/* exit network namespace */
+void smc_pnet_net_exit(struct net *net)
+{
+ /* flush pnet table */
+ smc_pnet_remove_by_pnetid(net, NULL);
+}
+
void smc_pnet_exit(void)
{
- smc_pnet_flush(NULL, NULL);
unregister_netdevice_notifier(&smc_netdev_notifier);
genl_unregister_family(&smc_pnet_nl_family);
}
@@ -674,22 +726,29 @@ static struct net_device *pnet_find_base_ndev(struct net_device *ndev)
return ndev;
}
-static int smc_pnet_find_ndev_pnetid_by_table(struct net_device *netdev,
+static int smc_pnet_find_ndev_pnetid_by_table(struct net_device *ndev,
u8 *pnetid)
{
+ struct smc_pnettable *pnettable;
+ struct net *net = dev_net(ndev);
struct smc_pnetentry *pnetelem;
+ struct smc_net *sn;
int rc = -ENOENT;
- read_lock(&smc_pnettable.lock);
- list_for_each_entry(pnetelem, &smc_pnettable.pnetlist, list) {
- if (netdev == pnetelem->ndev) {
+ /* get pnettable for namespace */
+ sn = net_generic(net, smc_net_id);
+ pnettable = &sn->pnettable;
+
+ read_lock(&pnettable->lock);
+ list_for_each_entry(pnetelem, &pnettable->pnetlist, list) {
+ if (ndev == pnetelem->ndev) {
/* get pnetid of netdev device */
memcpy(pnetid, pnetelem->pnet_name, SMC_MAX_PNETID_LEN);
rc = 0;
break;
}
}
- read_unlock(&smc_pnettable.lock);
+ read_unlock(&pnettable->lock);
return rc;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.