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bpf: Refactor to provide aux info to bpf_iter_init_seq_priv_t

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This patch refactored target bpf_iter_init_seq_priv_t callback
function to accept additional information. This will be needed
in later patches for map element targets since a particular
map should be passed to traverse elements for that particular
map. In the future, other information may be passed to target
as well, e.g., pid, cgroup id, etc. to customize the iterator.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200723184110.590156-1-yhs@fb.com
This commit is contained in:
Yonghong Song
2020-07-23 11:41:10 -07:00
committed by Alexei Starovoitov
parent 14fc6bd6b7
commit f9c7927295
7 changed files with 15 additions and 9 deletions
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3
include/linux/proc_fs.h
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@@ -133,7 +133,8 @@ struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mo
void *data);
extern struct pid *tgid_pidfd_to_pid(const struct file *file);
extern int bpf_iter_init_seq_net(void *priv_data);
struct bpf_iter_aux_info;
extern int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux);
extern void bpf_iter_fini_seq_net(void *priv_data);
#ifdef CONFIG_PROC_PID_ARCH_STATUS