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author | David S. Miller <davem@davemloft.net> | 2020-03-30 19:52:37 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2020-03-30 19:52:37 -0700 |
commit | ed52f2c608c9451fa2bad298b2ab927416105d65 (patch) | |
tree | d624be01447b5d578aa79b02b37f0023a867bb42 /kernel/cgroup | |
parent | f87238d30c0d550553a37585d0e27a8052952bb4 (diff) | |
parent | 8596a75f6c830a693ec86e6467a58b225713a7f1 (diff) | |
download | linux-ed52f2c608c9451fa2bad298b2ab927416105d65.tar.bz2 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/cgroup')
-rw-r--r-- | kernel/cgroup/cgroup.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 3dead0416b91..915dda3f7f19 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -6303,27 +6303,58 @@ void cgroup_sk_free(struct sock_cgroup_data *skcd) #endif /* CONFIG_SOCK_CGROUP_DATA */ #ifdef CONFIG_CGROUP_BPF -int cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog, - struct bpf_prog *replace_prog, enum bpf_attach_type type, +int cgroup_bpf_attach(struct cgroup *cgrp, + struct bpf_prog *prog, struct bpf_prog *replace_prog, + struct bpf_cgroup_link *link, + enum bpf_attach_type type, u32 flags) { int ret; mutex_lock(&cgroup_mutex); - ret = __cgroup_bpf_attach(cgrp, prog, replace_prog, type, flags); + ret = __cgroup_bpf_attach(cgrp, prog, replace_prog, link, type, flags); mutex_unlock(&cgroup_mutex); return ret; } + +int cgroup_bpf_replace(struct bpf_link *link, struct bpf_prog *old_prog, + struct bpf_prog *new_prog) +{ + struct bpf_cgroup_link *cg_link; + int ret; + + if (link->ops != &bpf_cgroup_link_lops) + return -EINVAL; + + cg_link = container_of(link, struct bpf_cgroup_link, link); + + mutex_lock(&cgroup_mutex); + /* link might have been auto-released by dying cgroup, so fail */ + if (!cg_link->cgroup) { + ret = -EINVAL; + goto out_unlock; + } + if (old_prog && link->prog != old_prog) { + ret = -EPERM; + goto out_unlock; + } + ret = __cgroup_bpf_replace(cg_link->cgroup, cg_link, new_prog); +out_unlock: + mutex_unlock(&cgroup_mutex); + return ret; +} + int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog, - enum bpf_attach_type type, u32 flags) + enum bpf_attach_type type) { int ret; mutex_lock(&cgroup_mutex); - ret = __cgroup_bpf_detach(cgrp, prog, type); + ret = __cgroup_bpf_detach(cgrp, prog, NULL, type); mutex_unlock(&cgroup_mutex); return ret; } + int cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr, union bpf_attr __user *uattr) { |