diff mbox series

[bpf-next,10/16] bpf: Disable unsupported functionalities for map with dynptr key

Message ID 20241008091501.8302-11-houtao@huaweicloud.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series Support dynptr key for hash map | expand

Checks

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bpf/vmtest-bpf-next-PR success PR summary
netdev/series_format fail Series longer than 15 patches
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netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
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netdev/verify_fixes success No Fixes tag
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Commit Message

Hou Tao Oct. 8, 2024, 9:14 a.m. UTC 
From: Hou Tao <houtao1@huawei.com>

For map with dynptr key, batched map operations and dumping all elements
through bpffs file are not yet supported. Therefore, disable these
functionalities for now.

Signed-off-by: Hou Tao <houtao1@huawei.com>
---
 include/linux/bpf.h  | 3 ++-
 kernel/bpf/syscall.c | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 3e25e94b7457..127952377025 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -592,7 +592,8 @@  static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
 {
 	return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
-		map->ops->map_seq_show_elem;
+		map->ops->map_seq_show_elem &&
+		!bpf_map_has_dynptr_key(map);
 }
 
 int map_check_no_btf(const struct bpf_map *map,
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 338f17530068..262f8a5541b6 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -5316,6 +5316,10 @@  static int bpf_map_do_batch(const union bpf_attr *attr,
 		err = -EPERM;
 		goto err_put;
 	}
+	if (bpf_map_has_dynptr_key(map)) {
+		err = -EOPNOTSUPP;
+		goto err_put;
+	}
 
 	if (cmd == BPF_MAP_LOOKUP_BATCH)
 		BPF_DO_BATCH(map->ops->map_lookup_batch, map, attr, uattr);