* [PATCH v3 bpf-next 1/2] bpf: Allow bpf_local_storage to be used by sleepable programs
2021-12-24 15:29 [PATCH v3 bpf-next 0/2] Sleepable local storage KP Singh
@ 2021-12-24 15:29 ` KP Singh
2021-12-28 23:58 ` Martin KaFai Lau
2021-12-24 15:29 ` [PATCH v3 bpf-next 2/2] bpf/selftests: Update local storage selftest for " KP Singh
2021-12-30 2:02 ` [PATCH v3 bpf-next 0/2] Sleepable local storage Alexei Starovoitov
2 siblings, 1 reply; 5+ messages in thread
From: KP Singh @ 2021-12-24 15:29 UTC (permalink / raw)
To: bpf
Cc: Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko,
Paul E. McKenney, Martin KaFai Lau
Other maps like hashmaps are already available to sleepable programs.
Sleepable BPF programs run under trace RCU. Allow task, sk and inode
storage to be used from sleepable programs. This allows sleepable and
non-sleepable programs to provide shareable annotations on kernel
objects.
Sleepable programs run in trace RCU where as non-sleepable programs run
in a normal RCU critical section i.e. __bpf_prog_enter{_sleepable}
and __bpf_prog_exit{_sleepable}) (rcu_read_lock or rcu_read_lock_trace).
In order to make the local storage maps accessible to both sleepable
and non-sleepable programs, one needs to call both
call_rcu_tasks_trace and call_rcu to wait for both trace and classical
RCU grace periods to expire before freeing memory.
Paul's work on call_rcu_tasks_trace allows us to have per CPU queueing
for call_rcu_tasks_trace. This behaviour can be achieved by setting
rcupdate.rcu_task_enqueue_lim=<num_cpus> boot parameter.
In light of these new performance changes and to keep the local storage
code simple, avoid adding a new flag for sleepable maps / local storage
to select the RCU synchronization (trace / classical).
Also, update the dereferencing of the pointers to use
rcu_derference_check (with either the trace or normal RCU locks held)
with a common bpf_rcu_lock_held helper method.
Signed-off-by: KP Singh <kpsingh@kernel.org>
---
include/linux/bpf_local_storage.h | 5 ++++
kernel/bpf/bpf_inode_storage.c | 6 +++-
kernel/bpf/bpf_local_storage.c | 50 +++++++++++++++++++++++--------
kernel/bpf/bpf_task_storage.c | 6 +++-
kernel/bpf/verifier.c | 3 ++
net/core/bpf_sk_storage.c | 8 ++++-
6 files changed, 62 insertions(+), 16 deletions(-)
diff --git a/include/linux/bpf_local_storage.h b/include/linux/bpf_local_storage.h
index 24496bc28e7b..475431a36a62 100644
--- a/include/linux/bpf_local_storage.h
+++ b/include/linux/bpf_local_storage.h
@@ -16,6 +16,9 @@
#define BPF_LOCAL_STORAGE_CACHE_SIZE 16
+#define bpf_rcu_lock_held() \
+ (rcu_read_lock_held() || rcu_read_lock_trace_held() || \
+ rcu_read_lock_bh_held())
struct bpf_local_storage_map_bucket {
struct hlist_head list;
raw_spinlock_t lock;
@@ -161,4 +164,6 @@ struct bpf_local_storage_data *
bpf_local_storage_update(void *owner, struct bpf_local_storage_map *smap,
void *value, u64 map_flags);
+void bpf_local_storage_free_rcu(struct rcu_head *rcu);
+
#endif /* _BPF_LOCAL_STORAGE_H */
diff --git a/kernel/bpf/bpf_inode_storage.c b/kernel/bpf/bpf_inode_storage.c
index 96ceed0e0fb5..e29d9e3d853e 100644
--- a/kernel/bpf/bpf_inode_storage.c
+++ b/kernel/bpf/bpf_inode_storage.c
@@ -17,6 +17,7 @@
#include <linux/bpf_lsm.h>
#include <linux/btf_ids.h>
#include <linux/fdtable.h>
+#include <linux/rcupdate_trace.h>
DEFINE_BPF_STORAGE_CACHE(inode_cache);
@@ -44,7 +45,8 @@ static struct bpf_local_storage_data *inode_storage_lookup(struct inode *inode,
if (!bsb)
return NULL;
- inode_storage = rcu_dereference(bsb->storage);
+ inode_storage =
+ rcu_dereference_check(bsb->storage, bpf_rcu_lock_held());
if (!inode_storage)
return NULL;
@@ -172,6 +174,7 @@ BPF_CALL_4(bpf_inode_storage_get, struct bpf_map *, map, struct inode *, inode,
{
struct bpf_local_storage_data *sdata;
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (flags & ~(BPF_LOCAL_STORAGE_GET_F_CREATE))
return (unsigned long)NULL;
@@ -204,6 +207,7 @@ BPF_CALL_4(bpf_inode_storage_get, struct bpf_map *, map, struct inode *, inode,
BPF_CALL_2(bpf_inode_storage_delete,
struct bpf_map *, map, struct inode *, inode)
{
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (!inode)
return -EINVAL;
diff --git a/kernel/bpf/bpf_local_storage.c b/kernel/bpf/bpf_local_storage.c
index b305270b7a4b..71de2a89869c 100644
--- a/kernel/bpf/bpf_local_storage.c
+++ b/kernel/bpf/bpf_local_storage.c
@@ -11,6 +11,9 @@
#include <net/sock.h>
#include <uapi/linux/sock_diag.h>
#include <uapi/linux/btf.h>
+#include <linux/rcupdate.h>
+#include <linux/rcupdate_trace.h>
+#include <linux/rcupdate_wait.h>
#define BPF_LOCAL_STORAGE_CREATE_FLAG_MASK (BPF_F_NO_PREALLOC | BPF_F_CLONE)
@@ -81,6 +84,22 @@ bpf_selem_alloc(struct bpf_local_storage_map *smap, void *owner,
return NULL;
}
+void bpf_local_storage_free_rcu(struct rcu_head *rcu)
+{
+ struct bpf_local_storage *local_storage;
+
+ local_storage = container_of(rcu, struct bpf_local_storage, rcu);
+ kfree_rcu(local_storage, rcu);
+}
+
+static void bpf_selem_free_rcu(struct rcu_head *rcu)
+{
+ struct bpf_local_storage_elem *selem;
+
+ selem = container_of(rcu, struct bpf_local_storage_elem, rcu);
+ kfree_rcu(selem, rcu);
+}
+
/* local_storage->lock must be held and selem->local_storage == local_storage.
* The caller must ensure selem->smap is still valid to be
* dereferenced for its smap->elem_size and smap->cache_idx.
@@ -93,7 +112,7 @@ bool bpf_selem_unlink_storage_nolock(struct bpf_local_storage *local_storage,
bool free_local_storage;
void *owner;
- smap = rcu_dereference(SDATA(selem)->smap);
+ smap = rcu_dereference_check(SDATA(selem)->smap, bpf_rcu_lock_held());
owner = local_storage->owner;
/* All uncharging on the owner must be done first.
@@ -118,12 +137,12 @@ bool bpf_selem_unlink_storage_nolock(struct bpf_local_storage *local_storage,
*
* Although the unlock will be done under
* rcu_read_lock(), it is more intutivie to
- * read if kfree_rcu(local_storage, rcu) is done
+ * read if the freeing of the storage is done
* after the raw_spin_unlock_bh(&local_storage->lock).
*
* Hence, a "bool free_local_storage" is returned
- * to the caller which then calls the kfree_rcu()
- * after unlock.
+ * to the caller which then calls then frees the storage after
+ * all the RCU grace periods have expired.
*/
}
hlist_del_init_rcu(&selem->snode);
@@ -131,8 +150,7 @@ bool bpf_selem_unlink_storage_nolock(struct bpf_local_storage *local_storage,
SDATA(selem))
RCU_INIT_POINTER(local_storage->cache[smap->cache_idx], NULL);
- kfree_rcu(selem, rcu);
-
+ call_rcu_tasks_trace(&selem->rcu, bpf_selem_free_rcu);
return free_local_storage;
}
@@ -146,7 +164,8 @@ static void __bpf_selem_unlink_storage(struct bpf_local_storage_elem *selem)
/* selem has already been unlinked from sk */
return;
- local_storage = rcu_dereference(selem->local_storage);
+ local_storage = rcu_dereference_check(selem->local_storage,
+ bpf_rcu_lock_held());
raw_spin_lock_irqsave(&local_storage->lock, flags);
if (likely(selem_linked_to_storage(selem)))
free_local_storage = bpf_selem_unlink_storage_nolock(
@@ -154,7 +173,8 @@ static void __bpf_selem_unlink_storage(struct bpf_local_storage_elem *selem)
raw_spin_unlock_irqrestore(&local_storage->lock, flags);
if (free_local_storage)
- kfree_rcu(local_storage, rcu);
+ call_rcu_tasks_trace(&local_storage->rcu,
+ bpf_local_storage_free_rcu);
}
void bpf_selem_link_storage_nolock(struct bpf_local_storage *local_storage,
@@ -174,7 +194,7 @@ void bpf_selem_unlink_map(struct bpf_local_storage_elem *selem)
/* selem has already be unlinked from smap */
return;
- smap = rcu_dereference(SDATA(selem)->smap);
+ smap = rcu_dereference_check(SDATA(selem)->smap, bpf_rcu_lock_held());
b = select_bucket(smap, selem);
raw_spin_lock_irqsave(&b->lock, flags);
if (likely(selem_linked_to_map(selem)))
@@ -213,12 +233,14 @@ bpf_local_storage_lookup(struct bpf_local_storage *local_storage,
struct bpf_local_storage_elem *selem;
/* Fast path (cache hit) */
- sdata = rcu_dereference(local_storage->cache[smap->cache_idx]);
+ sdata = rcu_dereference_check(local_storage->cache[smap->cache_idx],
+ bpf_rcu_lock_held());
if (sdata && rcu_access_pointer(sdata->smap) == smap)
return sdata;
/* Slow path (cache miss) */
- hlist_for_each_entry_rcu(selem, &local_storage->list, snode)
+ hlist_for_each_entry_rcu(selem, &local_storage->list, snode,
+ rcu_read_lock_trace_held())
if (rcu_access_pointer(SDATA(selem)->smap) == smap)
break;
@@ -306,7 +328,8 @@ int bpf_local_storage_alloc(void *owner,
* bucket->list, first_selem can be freed immediately
* (instead of kfree_rcu) because
* bpf_local_storage_map_free() does a
- * synchronize_rcu() before walking the bucket->list.
+ * synchronize_rcu_mult (waiting for both sleepable and
+ * normal programs) before walking the bucket->list.
* Hence, no one is accessing selem from the
* bucket->list under rcu_read_lock().
*/
@@ -342,7 +365,8 @@ bpf_local_storage_update(void *owner, struct bpf_local_storage_map *smap,
!map_value_has_spin_lock(&smap->map)))
return ERR_PTR(-EINVAL);
- local_storage = rcu_dereference(*owner_storage(smap, owner));
+ local_storage = rcu_dereference_check(*owner_storage(smap, owner),
+ bpf_rcu_lock_held());
if (!local_storage || hlist_empty(&local_storage->list)) {
/* Very first elem for the owner */
err = check_flags(NULL, map_flags);
diff --git a/kernel/bpf/bpf_task_storage.c b/kernel/bpf/bpf_task_storage.c
index bb69aea1a777..5da7bed0f5f6 100644
--- a/kernel/bpf/bpf_task_storage.c
+++ b/kernel/bpf/bpf_task_storage.c
@@ -17,6 +17,7 @@
#include <uapi/linux/btf.h>
#include <linux/btf_ids.h>
#include <linux/fdtable.h>
+#include <linux/rcupdate_trace.h>
DEFINE_BPF_STORAGE_CACHE(task_cache);
@@ -59,7 +60,8 @@ task_storage_lookup(struct task_struct *task, struct bpf_map *map,
struct bpf_local_storage *task_storage;
struct bpf_local_storage_map *smap;
- task_storage = rcu_dereference(task->bpf_storage);
+ task_storage =
+ rcu_dereference_check(task->bpf_storage, bpf_rcu_lock_held());
if (!task_storage)
return NULL;
@@ -229,6 +231,7 @@ BPF_CALL_4(bpf_task_storage_get, struct bpf_map *, map, struct task_struct *,
{
struct bpf_local_storage_data *sdata;
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (flags & ~(BPF_LOCAL_STORAGE_GET_F_CREATE))
return (unsigned long)NULL;
@@ -260,6 +263,7 @@ BPF_CALL_2(bpf_task_storage_delete, struct bpf_map *, map, struct task_struct *,
{
int ret;
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (!task)
return -EINVAL;
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index ca5cd0de804c..133599dfe2a2 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -11874,6 +11874,9 @@ static int check_map_prog_compatibility(struct bpf_verifier_env *env,
}
break;
case BPF_MAP_TYPE_RINGBUF:
+ case BPF_MAP_TYPE_INODE_STORAGE:
+ case BPF_MAP_TYPE_SK_STORAGE:
+ case BPF_MAP_TYPE_TASK_STORAGE:
break;
default:
verbose(env,
diff --git a/net/core/bpf_sk_storage.c b/net/core/bpf_sk_storage.c
index ea61dfe19c86..d9c37fd10809 100644
--- a/net/core/bpf_sk_storage.c
+++ b/net/core/bpf_sk_storage.c
@@ -13,6 +13,7 @@
#include <net/sock.h>
#include <uapi/linux/sock_diag.h>
#include <uapi/linux/btf.h>
+#include <linux/rcupdate_trace.h>
DEFINE_BPF_STORAGE_CACHE(sk_cache);
@@ -22,7 +23,8 @@ bpf_sk_storage_lookup(struct sock *sk, struct bpf_map *map, bool cacheit_lockit)
struct bpf_local_storage *sk_storage;
struct bpf_local_storage_map *smap;
- sk_storage = rcu_dereference(sk->sk_bpf_storage);
+ sk_storage =
+ rcu_dereference_check(sk->sk_bpf_storage, bpf_rcu_lock_held());
if (!sk_storage)
return NULL;
@@ -258,6 +260,7 @@ BPF_CALL_4(bpf_sk_storage_get, struct bpf_map *, map, struct sock *, sk,
{
struct bpf_local_storage_data *sdata;
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (!sk || !sk_fullsock(sk) || flags > BPF_SK_STORAGE_GET_F_CREATE)
return (unsigned long)NULL;
@@ -288,6 +291,7 @@ BPF_CALL_4(bpf_sk_storage_get, struct bpf_map *, map, struct sock *, sk,
BPF_CALL_2(bpf_sk_storage_delete, struct bpf_map *, map, struct sock *, sk)
{
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (!sk || !sk_fullsock(sk))
return -EINVAL;
@@ -416,6 +420,7 @@ static bool bpf_sk_storage_tracing_allowed(const struct bpf_prog *prog)
BPF_CALL_4(bpf_sk_storage_get_tracing, struct bpf_map *, map, struct sock *, sk,
void *, value, u64, flags)
{
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (in_hardirq() || in_nmi())
return (unsigned long)NULL;
@@ -425,6 +430,7 @@ BPF_CALL_4(bpf_sk_storage_get_tracing, struct bpf_map *, map, struct sock *, sk,
BPF_CALL_2(bpf_sk_storage_delete_tracing, struct bpf_map *, map,
struct sock *, sk)
{
+ WARN_ON_ONCE(!bpf_rcu_lock_held());
if (in_hardirq() || in_nmi())
return -EPERM;
--
2.34.1.448.ga2b2bfdf31-goog
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v3 bpf-next 2/2] bpf/selftests: Update local storage selftest for sleepable programs
2021-12-24 15:29 [PATCH v3 bpf-next 0/2] Sleepable local storage KP Singh
2021-12-24 15:29 ` [PATCH v3 bpf-next 1/2] bpf: Allow bpf_local_storage to be used by sleepable programs KP Singh
@ 2021-12-24 15:29 ` KP Singh
2021-12-30 2:02 ` [PATCH v3 bpf-next 0/2] Sleepable local storage Alexei Starovoitov
2 siblings, 0 replies; 5+ messages in thread
From: KP Singh @ 2021-12-24 15:29 UTC (permalink / raw)
To: bpf
Cc: Martin KaFai Lau, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Paul E. McKenney
Remove the spin lock logic and update the selftests to use sleepable
programs to use a mix of sleepable and non-sleepable programs. It's more
useful to test the sleepable programs since the tests don't really need
spinlocks.
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: KP Singh <kpsingh@kernel.org>
---
.../bpf/prog_tests/test_local_storage.c | 20 +++++-----------
.../selftests/bpf/progs/local_storage.c | 24 ++++---------------
2 files changed, 11 insertions(+), 33 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/test_local_storage.c b/tools/testing/selftests/bpf/prog_tests/test_local_storage.c
index d2c16eaae367..26ac26a88026 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_local_storage.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_local_storage.c
@@ -28,10 +28,6 @@ static unsigned int duration;
struct storage {
void *inode;
unsigned int value;
- /* Lock ensures that spin locked versions of local stoage operations
- * also work, most operations in this tests are still single threaded
- */
- struct bpf_spin_lock lock;
};
/* Fork and exec the provided rm binary and return the exit code of the
@@ -66,27 +62,24 @@ static int run_self_unlink(int *monitored_pid, const char *rm_path)
static bool check_syscall_operations(int map_fd, int obj_fd)
{
- struct storage val = { .value = TEST_STORAGE_VALUE, .lock = { 0 } },
- lookup_val = { .value = 0, .lock = { 0 } };
+ struct storage val = { .value = TEST_STORAGE_VALUE },
+ lookup_val = { .value = 0 };
int err;
/* Looking up an existing element should fail initially */
- err = bpf_map_lookup_elem_flags(map_fd, &obj_fd, &lookup_val,
- BPF_F_LOCK);
+ err = bpf_map_lookup_elem_flags(map_fd, &obj_fd, &lookup_val, 0);
if (CHECK(!err || errno != ENOENT, "bpf_map_lookup_elem",
"err:%d errno:%d\n", err, errno))
return false;
/* Create a new element */
- err = bpf_map_update_elem(map_fd, &obj_fd, &val,
- BPF_NOEXIST | BPF_F_LOCK);
+ err = bpf_map_update_elem(map_fd, &obj_fd, &val, BPF_NOEXIST);
if (CHECK(err < 0, "bpf_map_update_elem", "err:%d errno:%d\n", err,
errno))
return false;
/* Lookup the newly created element */
- err = bpf_map_lookup_elem_flags(map_fd, &obj_fd, &lookup_val,
- BPF_F_LOCK);
+ err = bpf_map_lookup_elem_flags(map_fd, &obj_fd, &lookup_val, 0);
if (CHECK(err < 0, "bpf_map_lookup_elem", "err:%d errno:%d", err,
errno))
return false;
@@ -102,8 +95,7 @@ static bool check_syscall_operations(int map_fd, int obj_fd)
return false;
/* The lookup should fail, now that the element has been deleted */
- err = bpf_map_lookup_elem_flags(map_fd, &obj_fd, &lookup_val,
- BPF_F_LOCK);
+ err = bpf_map_lookup_elem_flags(map_fd, &obj_fd, &lookup_val, 0);
if (CHECK(!err || errno != ENOENT, "bpf_map_lookup_elem",
"err:%d errno:%d\n", err, errno))
return false;
diff --git a/tools/testing/selftests/bpf/progs/local_storage.c b/tools/testing/selftests/bpf/progs/local_storage.c
index 95868bc7ada9..9b1f9b75d5c2 100644
--- a/tools/testing/selftests/bpf/progs/local_storage.c
+++ b/tools/testing/selftests/bpf/progs/local_storage.c
@@ -20,7 +20,6 @@ int sk_storage_result = -1;
struct local_storage {
struct inode *exec_inode;
__u32 value;
- struct bpf_spin_lock lock;
};
struct {
@@ -58,9 +57,7 @@ int BPF_PROG(unlink_hook, struct inode *dir, struct dentry *victim)
bpf_get_current_task_btf(), 0, 0);
if (storage) {
/* Don't let an executable delete itself */
- bpf_spin_lock(&storage->lock);
is_self_unlink = storage->exec_inode == victim->d_inode;
- bpf_spin_unlock(&storage->lock);
if (is_self_unlink)
return -EPERM;
}
@@ -68,7 +65,7 @@ int BPF_PROG(unlink_hook, struct inode *dir, struct dentry *victim)
return 0;
}
-SEC("lsm/inode_rename")
+SEC("lsm.s/inode_rename")
int BPF_PROG(inode_rename, struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
@@ -89,10 +86,8 @@ int BPF_PROG(inode_rename, struct inode *old_dir, struct dentry *old_dentry,
if (!storage)
return 0;
- bpf_spin_lock(&storage->lock);
if (storage->value != DUMMY_STORAGE_VALUE)
inode_storage_result = -1;
- bpf_spin_unlock(&storage->lock);
err = bpf_inode_storage_delete(&inode_storage_map, old_dentry->d_inode);
if (!err)
@@ -101,7 +96,7 @@ int BPF_PROG(inode_rename, struct inode *old_dir, struct dentry *old_dentry,
return 0;
}
-SEC("lsm/socket_bind")
+SEC("lsm.s/socket_bind")
int BPF_PROG(socket_bind, struct socket *sock, struct sockaddr *address,
int addrlen)
{
@@ -117,10 +112,8 @@ int BPF_PROG(socket_bind, struct socket *sock, struct sockaddr *address,
if (!storage)
return 0;
- bpf_spin_lock(&storage->lock);
if (storage->value != DUMMY_STORAGE_VALUE)
sk_storage_result = -1;
- bpf_spin_unlock(&storage->lock);
err = bpf_sk_storage_delete(&sk_storage_map, sock->sk);
if (!err)
@@ -129,7 +122,7 @@ int BPF_PROG(socket_bind, struct socket *sock, struct sockaddr *address,
return 0;
}
-SEC("lsm/socket_post_create")
+SEC("lsm.s/socket_post_create")
int BPF_PROG(socket_post_create, struct socket *sock, int family, int type,
int protocol, int kern)
{
@@ -144,9 +137,7 @@ int BPF_PROG(socket_post_create, struct socket *sock, int family, int type,
if (!storage)
return 0;
- bpf_spin_lock(&storage->lock);
storage->value = DUMMY_STORAGE_VALUE;
- bpf_spin_unlock(&storage->lock);
return 0;
}
@@ -154,7 +145,7 @@ int BPF_PROG(socket_post_create, struct socket *sock, int family, int type,
/* This uses the local storage to remember the inode of the binary that a
* process was originally executing.
*/
-SEC("lsm/bprm_committed_creds")
+SEC("lsm.s/bprm_committed_creds")
void BPF_PROG(exec, struct linux_binprm *bprm)
{
__u32 pid = bpf_get_current_pid_tgid() >> 32;
@@ -166,18 +157,13 @@ void BPF_PROG(exec, struct linux_binprm *bprm)
storage = bpf_task_storage_get(&task_storage_map,
bpf_get_current_task_btf(), 0,
BPF_LOCAL_STORAGE_GET_F_CREATE);
- if (storage) {
- bpf_spin_lock(&storage->lock);
+ if (storage)
storage->exec_inode = bprm->file->f_inode;
- bpf_spin_unlock(&storage->lock);
- }
storage = bpf_inode_storage_get(&inode_storage_map, bprm->file->f_inode,
0, BPF_LOCAL_STORAGE_GET_F_CREATE);
if (!storage)
return;
- bpf_spin_lock(&storage->lock);
storage->value = DUMMY_STORAGE_VALUE;
- bpf_spin_unlock(&storage->lock);
}
--
2.34.1.448.ga2b2bfdf31-goog
^ permalink raw reply related [flat|nested] 5+ messages in thread