KFunc bpf_iter_css_next
Iterate over cGroup subsystem states.
Definition
struct cgroup_subsys_state *bpf_iter_css_next(struct bpf_iter_css *it)
Note
The pointer returned by the kfunc may be NULL. Hence, it forces the user to do a NULL check on the pointer returned from the kfunc before making use of it (dereferencing or passing to another helper).
Usage
See bpf_iter_css_new
for usage details.
Program types
The following program types can make use of this kfunc:
BPF_PROG_TYPE_CGROUP_SKB
BPF_PROG_TYPE_CGROUP_SOCK_ADDR
BPF_PROG_TYPE_LSM
BPF_PROG_TYPE_LWT_IN
BPF_PROG_TYPE_LWT_OUT
BPF_PROG_TYPE_LWT_SEG6LOCAL
BPF_PROG_TYPE_LWT_XMIT
BPF_PROG_TYPE_NETFILTER
BPF_PROG_TYPE_SCHED_ACT
BPF_PROG_TYPE_SCHED_CLS
BPF_PROG_TYPE_SK_SKB
BPF_PROG_TYPE_SOCKET_FILTER
BPF_PROG_TYPE_STRUCT_OPS
BPF_PROG_TYPE_SYSCALL
BPF_PROG_TYPE_TRACING
BPF_PROG_TYPE_XDP
Example
See bpf_iter_css_new
an example.