summaryrefslogtreecommitdiffstats
path: root/net/mptcp/pm_userspace.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/mptcp/pm_userspace.c')
-rw-r--r--net/mptcp/pm_userspace.c115
1 files changed, 88 insertions, 27 deletions
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index d042d32beb..01b3a8f2f0 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -26,7 +26,8 @@ void mptcp_free_local_addr_list(struct mptcp_sock *msk)
}
static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
- struct mptcp_pm_addr_entry *entry)
+ struct mptcp_pm_addr_entry *entry,
+ bool needs_id)
{
DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
struct mptcp_pm_addr_entry *match = NULL;
@@ -41,7 +42,7 @@ static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
spin_lock_bh(&msk->pm.lock);
list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) {
addr_match = mptcp_addresses_equal(&e->addr, &entry->addr, true);
- if (addr_match && entry->addr.id == 0)
+ if (addr_match && entry->addr.id == 0 && needs_id)
entry->addr.id = e->addr.id;
id_match = (e->addr.id == entry->addr.id);
if (addr_match && id_match) {
@@ -64,7 +65,7 @@ static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
}
*e = *entry;
- if (!e->addr.id)
+ if (!e->addr.id && needs_id)
e->addr.id = find_next_zero_bit(id_bitmap,
MPTCP_PM_MAX_ADDR_ID + 1,
1);
@@ -130,10 +131,21 @@ int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk,
int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk,
struct mptcp_addr_info *skc)
{
- struct mptcp_pm_addr_entry new_entry;
+ struct mptcp_pm_addr_entry *entry = NULL, *e, new_entry;
__be16 msk_sport = ((struct inet_sock *)
inet_sk((struct sock *)msk))->inet_sport;
+ spin_lock_bh(&msk->pm.lock);
+ list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) {
+ if (mptcp_addresses_equal(&e->addr, skc, false)) {
+ entry = e;
+ break;
+ }
+ }
+ spin_unlock_bh(&msk->pm.lock);
+ if (entry)
+ return entry->addr.id;
+
memset(&new_entry, 0, sizeof(struct mptcp_pm_addr_entry));
new_entry.addr = *skc;
new_entry.addr.id = 0;
@@ -142,16 +154,17 @@ int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk,
if (new_entry.addr.port == msk_sport)
new_entry.addr.port = 0;
- return mptcp_userspace_pm_append_new_local_addr(msk, &new_entry);
+ return mptcp_userspace_pm_append_new_local_addr(msk, &new_entry, true);
}
-int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
+int mptcp_pm_nl_announce_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
struct nlattr *addr = info->attrs[MPTCP_PM_ATTR_ADDR];
struct mptcp_pm_addr_entry addr_val;
struct mptcp_sock *msk;
int err = -EINVAL;
+ struct sock *sk;
u32 token_val;
if (!addr || !token) {
@@ -167,6 +180,8 @@ int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
return err;
}
+ sk = (struct sock *)msk;
+
if (!mptcp_pm_is_userspace(msk)) {
GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
goto announce_err;
@@ -184,13 +199,13 @@ int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
goto announce_err;
}
- err = mptcp_userspace_pm_append_new_local_addr(msk, &addr_val);
+ err = mptcp_userspace_pm_append_new_local_addr(msk, &addr_val, false);
if (err < 0) {
GENL_SET_ERR_MSG(info, "did not match address and id");
goto announce_err;
}
- lock_sock((struct sock *)msk);
+ lock_sock(sk);
spin_lock_bh(&msk->pm.lock);
if (mptcp_pm_alloc_anno_list(msk, &addr_val.addr)) {
@@ -200,15 +215,49 @@ int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
}
spin_unlock_bh(&msk->pm.lock);
- release_sock((struct sock *)msk);
+ release_sock(sk);
err = 0;
announce_err:
- sock_put((struct sock *)msk);
+ sock_put(sk);
return err;
}
-int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
+static int mptcp_userspace_pm_remove_id_zero_address(struct mptcp_sock *msk,
+ struct genl_info *info)
+{
+ struct mptcp_rm_list list = { .nr = 0 };
+ struct mptcp_subflow_context *subflow;
+ struct sock *sk = (struct sock *)msk;
+ bool has_id_0 = false;
+ int err = -EINVAL;
+
+ lock_sock(sk);
+ mptcp_for_each_subflow(msk, subflow) {
+ if (READ_ONCE(subflow->local_id) == 0) {
+ has_id_0 = true;
+ break;
+ }
+ }
+ if (!has_id_0) {
+ GENL_SET_ERR_MSG(info, "address with id 0 not found");
+ goto remove_err;
+ }
+
+ list.ids[list.nr++] = 0;
+
+ spin_lock_bh(&msk->pm.lock);
+ mptcp_pm_remove_addr(msk, &list);
+ spin_unlock_bh(&msk->pm.lock);
+
+ err = 0;
+
+remove_err:
+ release_sock(sk);
+ return err;
+}
+
+int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID];
@@ -217,6 +266,7 @@ int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
struct mptcp_sock *msk;
LIST_HEAD(free_list);
int err = -EINVAL;
+ struct sock *sk;
u32 token_val;
u8 id_val;
@@ -234,12 +284,19 @@ int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
return err;
}
+ sk = (struct sock *)msk;
+
if (!mptcp_pm_is_userspace(msk)) {
GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
goto remove_err;
}
- lock_sock((struct sock *)msk);
+ if (id_val == 0) {
+ err = mptcp_userspace_pm_remove_id_zero_address(msk, info);
+ goto remove_err;
+ }
+
+ lock_sock(sk);
list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
if (entry->addr.id == id_val) {
@@ -250,7 +307,7 @@ int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
if (!match) {
GENL_SET_ERR_MSG(info, "address with specified id not found");
- release_sock((struct sock *)msk);
+ release_sock(sk);
goto remove_err;
}
@@ -258,19 +315,19 @@ int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
mptcp_pm_remove_addrs(msk, &free_list);
- release_sock((struct sock *)msk);
+ release_sock(sk);
list_for_each_entry_safe(match, entry, &free_list, list) {
- sock_kfree_s((struct sock *)msk, match, sizeof(*match));
+ sock_kfree_s(sk, match, sizeof(*match));
}
err = 0;
remove_err:
- sock_put((struct sock *)msk);
+ sock_put(sk);
return err;
}
-int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
+int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
@@ -296,6 +353,8 @@ int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
return err;
}
+ sk = (struct sock *)msk;
+
if (!mptcp_pm_is_userspace(msk)) {
GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
goto create_err;
@@ -313,8 +372,6 @@ int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
goto create_err;
}
- sk = (struct sock *)msk;
-
if (!mptcp_pm_addr_families_match(sk, &addr_l, &addr_r)) {
GENL_SET_ERR_MSG(info, "families mismatch");
err = -EINVAL;
@@ -322,7 +379,7 @@ int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
}
local.addr = addr_l;
- err = mptcp_userspace_pm_append_new_local_addr(msk, &local);
+ err = mptcp_userspace_pm_append_new_local_addr(msk, &local, false);
if (err < 0) {
GENL_SET_ERR_MSG(info, "did not match address and id");
goto create_err;
@@ -342,7 +399,7 @@ int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
spin_unlock_bh(&msk->pm.lock);
create_err:
- sock_put((struct sock *)msk);
+ sock_put(sk);
return err;
}
@@ -394,7 +451,7 @@ static struct sock *mptcp_nl_find_ssk(struct mptcp_sock *msk,
return NULL;
}
-int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
+int mptcp_pm_nl_subflow_destroy_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
@@ -419,6 +476,8 @@ int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
return err;
}
+ sk = (struct sock *)msk;
+
if (!mptcp_pm_is_userspace(msk)) {
GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
goto destroy_err;
@@ -448,7 +507,6 @@ int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
goto destroy_err;
}
- sk = (struct sock *)msk;
lock_sock(sk);
ssk = mptcp_nl_find_ssk(msk, &addr_l, &addr_r);
if (ssk) {
@@ -468,7 +526,7 @@ int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
release_sock(sk);
destroy_err:
- sock_put((struct sock *)msk);
+ sock_put(sk);
return err;
}
@@ -478,6 +536,7 @@ int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
{
struct mptcp_sock *msk;
int ret = -EINVAL;
+ struct sock *sk;
u32 token_val;
token_val = nla_get_u32(token);
@@ -486,6 +545,8 @@ int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
if (!msk)
return ret;
+ sk = (struct sock *)msk;
+
if (!mptcp_pm_is_userspace(msk))
goto set_flags_err;
@@ -493,11 +554,11 @@ int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
rem->addr.family == AF_UNSPEC)
goto set_flags_err;
- lock_sock((struct sock *)msk);
+ lock_sock(sk);
ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc->addr, &rem->addr, bkup);
- release_sock((struct sock *)msk);
+ release_sock(sk);
set_flags_err:
- sock_put((struct sock *)msk);
+ sock_put(sk);
return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 13:41:50 +0000