UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

bpf: Add bpf_selem_free_rcu callback 

Add bpf_selem_free_rcu() callback to do the kfree() instead
of using kfree_rcu. It is a preparation work for using
bpf_mem_cache_alloc/free in a later patch.

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20230308065936.1550103-9-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Martin KaFai Lau 2023-03-07 22:59:27 -08:00 committed by Alexei Starovoitov
parent c609981342
commit f8ccf30c17
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
kernel/bpf/bpf_local_storage.c
View File

@ -109,15 +109,20 @@ static void bpf_local_storage_free_rcu(struct rcu_head *rcu)
kfree_rcu(local_storage, rcu);
}
static void bpf_selem_free_trace_rcu(struct rcu_head *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(selem);
}
static void bpf_selem_free_trace_rcu(struct rcu_head *rcu)
{
if (rcu_trace_implies_rcu_gp())
kfree(selem);
bpf_selem_free_rcu(rcu);
else
kfree_rcu(selem, rcu);
call_rcu(rcu, bpf_selem_free_rcu);
}
/* local_storage->lock must be held and selem->local_storage == local_storage.
@ -174,7 +179,7 @@ static bool bpf_selem_unlink_storage_nolock(struct bpf_local_storage *local_stor
if (!reuse_now)
call_rcu_tasks_trace(&selem->rcu, bpf_selem_free_trace_rcu);
else
kfree_rcu(selem, rcu);
call_rcu(&selem->rcu, bpf_selem_free_rcu);
if (rcu_access_pointer(local_storage->smap) == smap)
RCU_INIT_POINTER(local_storage->smap, NULL);