diff options
author | Florian Westphal <fw@strlen.de> | 2021-02-04 15:23:30 -0800 |
---|---|---|
committer | Jakub Kicinski <kuba@kernel.org> | 2021-02-06 14:35:47 -0800 |
commit | 3abc05d9ef6fe989706b679e1e6371d6360d3db4 (patch) | |
tree | 5672614138e7851ae7d4a191bfd784085d16588c /net/mptcp | |
parent | 1002b89f23eaa6d48ca1d2f362e894086bd063f1 (diff) | |
download | linux-3abc05d9ef6fe989706b679e1e6371d6360d3db4.tar.bz2 |
mptcp: pm: add lockdep assertions
Add a few assertions to make sure functions are called with the needed
locks held.
Two functions gain might_sleep annotations because they contain
conditional calls to functions that sleep.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp')
-rw-r--r-- | net/mptcp/pm.c | 2 | ||||
-rw-r--r-- | net/mptcp/pm_netlink.c | 13 | ||||
-rw-r--r-- | net/mptcp/protocol.c | 4 | ||||
-rw-r--r-- | net/mptcp/protocol.h | 5 |
4 files changed, 24 insertions, 0 deletions
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 3a22e73220b9..1a25003fd8e3 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -20,6 +20,8 @@ int mptcp_pm_announce_addr(struct mptcp_sock *msk, pr_debug("msk=%p, local_id=%d", msk, addr->id); + lockdep_assert_held(&msk->pm.lock); + if (add_addr) { pr_warn("addr_signal error, add_addr=%d", add_addr); return -EINVAL; diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index e7b1abb4f0c2..23780a13b934 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -145,6 +145,8 @@ select_local_address(const struct pm_nl_pernet *pernet, struct mptcp_pm_addr_entry *entry, *ret = NULL; struct sock *sk = (struct sock *)msk; + msk_owned_by_me(msk); + rcu_read_lock(); __mptcp_flush_join_list(msk); list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) { @@ -246,6 +248,8 @@ lookup_anno_list_by_saddr(struct mptcp_sock *msk, { struct mptcp_pm_add_entry *entry; + lockdep_assert_held(&msk->pm.lock); + list_for_each_entry(entry, &msk->pm.anno_list, list) { if (addresses_equal(&entry->addr, addr, true)) return entry; @@ -342,6 +346,8 @@ static bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk, struct sock *sk = (struct sock *)msk; struct net *net = sock_net(sk); + lockdep_assert_held(&msk->pm.lock); + if (lookup_anno_list_by_saddr(msk, &entry->addr)) return false; @@ -496,6 +502,9 @@ void mptcp_pm_nl_add_addr_send_ack(struct mptcp_sock *msk) { struct mptcp_subflow_context *subflow; + msk_owned_by_me(msk); + lockdep_assert_held(&msk->pm.lock); + if (!mptcp_pm_should_add_signal(msk)) return; @@ -566,6 +575,8 @@ void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk) pr_debug("address rm_id %d", msk->pm.rm_id); + msk_owned_by_me(msk); + if (!msk->pm.rm_id) return; @@ -601,6 +612,8 @@ void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk, u8 rm_id) pr_debug("subflow rm_id %d", rm_id); + msk_owned_by_me(msk); + if (!rm_id) return; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 1405e146dd7c..b9f16a1535d2 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2187,6 +2187,8 @@ static void __mptcp_close_subflow(struct mptcp_sock *msk) { struct mptcp_subflow_context *subflow, *tmp; + might_sleep(); + list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) { struct sock *ssk = mptcp_subflow_tcp_sock(subflow); @@ -2529,6 +2531,8 @@ static void __mptcp_destroy_sock(struct sock *sk) pr_debug("msk=%p", msk); + might_sleep(); + /* dispose the ancillatory tcp socket, if any */ if (msk->subflow) { iput(SOCK_INODE(msk->subflow)); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 1cc7948a1826..73a923d02aad 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -288,6 +288,11 @@ struct mptcp_sock { #define mptcp_for_each_subflow(__msk, __subflow) \ list_for_each_entry(__subflow, &((__msk)->conn_list), node) +static inline void msk_owned_by_me(const struct mptcp_sock *msk) +{ + sock_owned_by_me((const struct sock *)msk); +} + static inline struct mptcp_sock *mptcp_sk(const struct sock *sk) { return (struct mptcp_sock *)sk; |