diff mbox series

[bpf-next,v2,14/20] bpf: Export bpf_dynptr_set_size

Message ID 20250125111109.732718-15-houtao@huaweicloud.com (mailing list archive)
State New
Delegated to: BPF
Headers show
Series Support dynptr key for hash map | expand

Checks

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bpf/vmtest-bpf-next-VM_Test-6 success Logs for aarch64-gcc / test (test_maps, false, 360) / test_maps on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-33 success Logs for x86_64-llvm-18 / veristat-kernel
bpf/vmtest-bpf-next-VM_Test-34 success Logs for x86_64-llvm-18 / veristat-meta
bpf/vmtest-bpf-next-PR fail PR summary
bpf/vmtest-bpf-next-VM_Test-7 success Logs for aarch64-gcc / test (test_progs, false, 360) / test_progs on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-8 success Logs for aarch64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-14 success Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-15 success Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
netdev/series_format fail Series longer than 15 patches
netdev/tree_selection success Clearly marked for bpf-next, async
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
netdev/build_32bit success Errors and warnings before: 196 this patch: 196
netdev/build_tools success Errors and warnings before: 26 (+1) this patch: 26 (+1)
netdev/cc_maintainers success CCed 13 of 13 maintainers
netdev/build_clang success Errors and warnings before: 9353 this patch: 9353
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 7001 this patch: 7001
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 15 lines checked
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netdev/kdoc success Errors and warnings before: 17 this patch: 17
netdev/source_inline success Was 0 now: 0

Commit Message

Hou Tao Jan. 25, 2025, 11:11 a.m. UTC
From: Hou Tao <houtao1@huawei.com>

It will be used by the following patch to shrink the size of dynptr when
the actual data length is smaller than the size of dynptr during
map_get_next_key operation.

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

Patch

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index ee02a5d313c56..a7dcdbd8c2824 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1351,6 +1351,7 @@  enum bpf_dynptr_type {
 };
 
 int bpf_dynptr_check_size(u32 size);
+void bpf_dynptr_set_size(struct bpf_dynptr_kern *ptr, u32 new_size);
 u32 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr);
 const void *__bpf_dynptr_data(const struct bpf_dynptr_kern *ptr, u32 len);
 void *__bpf_dynptr_data_rw(const struct bpf_dynptr_kern *ptr, u32 len);
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 9fc35656d3e68..a045c131dcefe 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -1723,7 +1723,7 @@  u32 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr)
 	return ptr->size & DYNPTR_SIZE_MASK;
 }
 
-static void bpf_dynptr_set_size(struct bpf_dynptr_kern *ptr, u32 new_size)
+void bpf_dynptr_set_size(struct bpf_dynptr_kern *ptr, u32 new_size)
 {
 	u32 metadata = ptr->size & ~DYNPTR_SIZE_MASK;