23  *   struct bpf_mprog_entry *entry, *entry_new;
27  *   // fetch active @entry from attach location
29  *   ret = bpf_mprog_attach(entry, &entry_new, [...]);
31  *       if (entry != entry_new) {
32  *           // swap @entry to @entry_new at attach location
33  *           // ensure there are no inflight users of @entry:
36  *       bpf_mprog_commit(entry);
44  *   struct bpf_mprog_entry *entry, *entry_new;
48  *   // fetch active @entry from attach location
50  *   ret = bpf_mprog_detach(entry, &entry_new, [...]);
56  *       // swap @entry to @entry_new at attach location
57  *       // ensure there are no inflight users of @entry:
59  *       bpf_mprog_commit(entry);
69  *   struct bpf_mprog_entry *entry;
73  *   // fetch active @entry from attach location
75  *   ret = bpf_mprog_query(attr, uattr, entry);
80  *   struct bpf_mprog_entry *entry;
86  *   // fetch active @entry from attach location
88  *   bpf_mprog_foreach_prog(entry, fp, prog) {
115 #define bpf_mprog_foreach_tuple(entry, fp, cp, t)			\  argument
116 	for (fp = &entry->fp_items[0], cp = &entry->parent->cp_items[0];\
124 #define bpf_mprog_foreach_prog(entry, fp, p)				\  argument
125 	for (fp = &entry->fp_items[0];					\
159 bpf_mprog_peer(const struct bpf_mprog_entry *entry)  in bpf_mprog_peer()  argument
161 	if (entry == &entry->parent->a)  in bpf_mprog_peer()
162 		return &entry->parent->b;  in bpf_mprog_peer()
164 		return &entry->parent->a;  in bpf_mprog_peer()
179 static inline void bpf_mprog_inc(struct bpf_mprog_entry *entry)  in bpf_mprog_inc()  argument
181 	entry->parent->count++;  in bpf_mprog_inc()
184 static inline void bpf_mprog_dec(struct bpf_mprog_entry *entry)  in bpf_mprog_dec()  argument
186 	entry->parent->count--;  in bpf_mprog_dec()
194 static inline int bpf_mprog_total(struct bpf_mprog_entry *entry)  in bpf_mprog_total()  argument
196 	int total = entry->parent->count;  in bpf_mprog_total()
202 static inline bool bpf_mprog_exists(struct bpf_mprog_entry *entry,  in bpf_mprog_exists()  argument
208 	bpf_mprog_foreach_prog(entry, fp, tmp) {  in bpf_mprog_exists()
215 static inline void bpf_mprog_mark_for_release(struct bpf_mprog_entry *entry,  in bpf_mprog_mark_for_release()  argument
218 	WARN_ON_ONCE(entry->parent->ref);  in bpf_mprog_mark_for_release()
220 		entry->parent->ref = tuple->prog;  in bpf_mprog_mark_for_release()
223 static inline void bpf_mprog_complete_release(struct bpf_mprog_entry *entry)  in bpf_mprog_complete_release()  argument
231 	if (entry->parent->ref) {  in bpf_mprog_complete_release()
232 		bpf_prog_put(entry->parent->ref);  in bpf_mprog_complete_release()
233 		entry->parent->ref = NULL;  in bpf_mprog_complete_release()
237 static inline void bpf_mprog_revision_new(struct bpf_mprog_entry *entry)  in bpf_mprog_revision_new()  argument
239 	atomic64_inc(&entry->parent->revision);  in bpf_mprog_revision_new()
242 static inline void bpf_mprog_commit(struct bpf_mprog_entry *entry)  in bpf_mprog_commit()  argument
244 	bpf_mprog_complete_release(entry);  in bpf_mprog_commit()
245 	bpf_mprog_revision_new(entry);  in bpf_mprog_commit()
248 static inline u64 bpf_mprog_revision(struct bpf_mprog_entry *entry)  in bpf_mprog_revision()  argument
250 	return atomic64_read(&entry->parent->revision);  in bpf_mprog_revision()
264 static inline void bpf_mprog_clear_all(struct bpf_mprog_entry *entry,  in bpf_mprog_clear_all()  argument
269 	peer = bpf_mprog_peer(entry);  in bpf_mprog_clear_all()
275 static inline void bpf_mprog_entry_grow(struct bpf_mprog_entry *entry, int idx)  in bpf_mprog_entry_grow()  argument
277 	int total = bpf_mprog_total(entry);  in bpf_mprog_entry_grow()
279 	memmove(entry->fp_items + idx + 1,  in bpf_mprog_entry_grow()
280 		entry->fp_items + idx,  in bpf_mprog_entry_grow()
283 	memmove(entry->parent->cp_items + idx + 1,  in bpf_mprog_entry_grow()
284 		entry->parent->cp_items + idx,  in bpf_mprog_entry_grow()
288 static inline void bpf_mprog_entry_shrink(struct bpf_mprog_entry *entry, int idx)  in bpf_mprog_entry_shrink()  argument
291 	 * entry is copied at the end.  in bpf_mprog_entry_shrink()
293 	int total = ARRAY_SIZE(entry->fp_items);  in bpf_mprog_entry_shrink()
295 	memmove(entry->fp_items + idx,  in bpf_mprog_entry_shrink()
296 		entry->fp_items + idx + 1,  in bpf_mprog_entry_shrink()
299 	memmove(entry->parent->cp_items + idx,  in bpf_mprog_entry_shrink()
300 		entry->parent->cp_items + idx + 1,  in bpf_mprog_entry_shrink()
304 static inline void bpf_mprog_read(struct bpf_mprog_entry *entry, u32 idx,  in bpf_mprog_read()  argument
308 	*fp = &entry->fp_items[idx];  in bpf_mprog_read()
309 	*cp = &entry->parent->cp_items[idx];  in bpf_mprog_read()
320 int bpf_mprog_attach(struct bpf_mprog_entry *entry,
326 int bpf_mprog_detach(struct bpf_mprog_entry *entry,
332 		    struct bpf_mprog_entry *entry);