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-rw-r--r--tools/lib/bpf/btf.c123
1 files changed, 43 insertions, 80 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 231b07203e3d..89fecfe5cb2b 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -1560,6 +1560,20 @@ static void btf_type_inc_vlen(struct btf_type *t)
t->info = btf_type_info(btf_kind(t), btf_vlen(t) + 1, btf_kflag(t));
}
+static int btf_commit_type(struct btf *btf, int data_sz)
+{
+ int err;
+
+ err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
+ if (err)
+ return err;
+
+ btf->hdr->type_len += data_sz;
+ btf->hdr->str_off += data_sz;
+ btf->nr_types++;
+ return btf->nr_types;
+}
+
/*
* Append new BTF_KIND_INT type with:
* - *name* - non-empty, non-NULL type name;
@@ -1572,7 +1586,7 @@ static void btf_type_inc_vlen(struct btf_type *t)
int btf__add_int(struct btf *btf, const char *name, size_t byte_sz, int encoding)
{
struct btf_type *t;
- int sz, err, name_off;
+ int sz, name_off;
/* non-empty name */
if (!name || !name[0])
@@ -1606,14 +1620,7 @@ int btf__add_int(struct btf *btf, const char *name, size_t byte_sz, int encoding
/* set INT info, we don't allow setting legacy bit offset/size */
*(__u32 *)(t + 1) = (encoding << 24) | (byte_sz * 8);
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/* it's completely legal to append BTF types with type IDs pointing forward to
@@ -1631,7 +1638,7 @@ static int validate_type_id(int id)
static int btf_add_ref_kind(struct btf *btf, int kind, const char *name, int ref_type_id)
{
struct btf_type *t;
- int sz, name_off = 0, err;
+ int sz, name_off = 0;
if (validate_type_id(ref_type_id))
return -EINVAL;
@@ -1654,14 +1661,7 @@ static int btf_add_ref_kind(struct btf *btf, int kind, const char *name, int ref
t->info = btf_type_info(kind, 0, 0);
t->type = ref_type_id;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/*
@@ -1689,7 +1689,7 @@ int btf__add_array(struct btf *btf, int index_type_id, int elem_type_id, __u32 n
{
struct btf_type *t;
struct btf_array *a;
- int sz, err;
+ int sz;
if (validate_type_id(index_type_id) || validate_type_id(elem_type_id))
return -EINVAL;
@@ -1711,21 +1711,14 @@ int btf__add_array(struct btf *btf, int index_type_id, int elem_type_id, __u32 n
a->index_type = index_type_id;
a->nelems = nr_elems;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/* generic STRUCT/UNION append function */
static int btf_add_composite(struct btf *btf, int kind, const char *name, __u32 bytes_sz)
{
struct btf_type *t;
- int sz, err, name_off = 0;
+ int sz, name_off = 0;
if (btf_ensure_modifiable(btf))
return -ENOMEM;
@@ -1748,14 +1741,7 @@ static int btf_add_composite(struct btf *btf, int kind, const char *name, __u32
t->info = btf_type_info(kind, 0, 0);
t->size = bytes_sz;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/*
@@ -1793,6 +1779,11 @@ int btf__add_union(struct btf *btf, const char *name, __u32 byte_sz)
return btf_add_composite(btf, BTF_KIND_UNION, name, byte_sz);
}
+static struct btf_type *btf_last_type(struct btf *btf)
+{
+ return btf_type_by_id(btf, btf__get_nr_types(btf));
+}
+
/*
* Append new field for the current STRUCT/UNION type with:
* - *name* - name of the field, can be NULL or empty for anonymous field;
@@ -1814,7 +1805,7 @@ int btf__add_field(struct btf *btf, const char *name, int type_id,
/* last type should be union/struct */
if (btf->nr_types == 0)
return -EINVAL;
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
if (!btf_is_composite(t))
return -EINVAL;
@@ -1849,7 +1840,7 @@ int btf__add_field(struct btf *btf, const char *name, int type_id,
m->offset = bit_offset | (bit_size << 24);
/* btf_add_type_mem can invalidate t pointer */
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
/* update parent type's vlen and kflag */
t->info = btf_type_info(btf_kind(t), btf_vlen(t) + 1, is_bitfield || btf_kflag(t));
@@ -1874,7 +1865,7 @@ int btf__add_field(struct btf *btf, const char *name, int type_id,
int btf__add_enum(struct btf *btf, const char *name, __u32 byte_sz)
{
struct btf_type *t;
- int sz, err, name_off = 0;
+ int sz, name_off = 0;
/* byte_sz must be power of 2 */
if (!byte_sz || (byte_sz & (byte_sz - 1)) || byte_sz > 8)
@@ -1899,14 +1890,7 @@ int btf__add_enum(struct btf *btf, const char *name, __u32 byte_sz)
t->info = btf_type_info(BTF_KIND_ENUM, 0, 0);
t->size = byte_sz;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/*
@@ -1926,7 +1910,7 @@ int btf__add_enum_value(struct btf *btf, const char *name, __s64 value)
/* last type should be BTF_KIND_ENUM */
if (btf->nr_types == 0)
return -EINVAL;
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
if (!btf_is_enum(t))
return -EINVAL;
@@ -1953,7 +1937,7 @@ int btf__add_enum_value(struct btf *btf, const char *name, __s64 value)
v->val = value;
/* update parent type's vlen */
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
btf_type_inc_vlen(t);
btf->hdr->type_len += sz;
@@ -2093,7 +2077,7 @@ int btf__add_func(struct btf *btf, const char *name,
int btf__add_func_proto(struct btf *btf, int ret_type_id)
{
struct btf_type *t;
- int sz, err;
+ int sz;
if (validate_type_id(ret_type_id))
return -EINVAL;
@@ -2113,14 +2097,7 @@ int btf__add_func_proto(struct btf *btf, int ret_type_id)
t->info = btf_type_info(BTF_KIND_FUNC_PROTO, 0, 0);
t->type = ret_type_id;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/*
@@ -2143,7 +2120,7 @@ int btf__add_func_param(struct btf *btf, const char *name, int type_id)
/* last type should be BTF_KIND_FUNC_PROTO */
if (btf->nr_types == 0)
return -EINVAL;
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
if (!btf_is_func_proto(t))
return -EINVAL;
@@ -2166,7 +2143,7 @@ int btf__add_func_param(struct btf *btf, const char *name, int type_id)
p->type = type_id;
/* update parent type's vlen */
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
btf_type_inc_vlen(t);
btf->hdr->type_len += sz;
@@ -2188,7 +2165,7 @@ int btf__add_var(struct btf *btf, const char *name, int linkage, int type_id)
{
struct btf_type *t;
struct btf_var *v;
- int sz, err, name_off;
+ int sz, name_off;
/* non-empty name */
if (!name || !name[0])
@@ -2219,14 +2196,7 @@ int btf__add_var(struct btf *btf, const char *name, int linkage, int type_id)
v = btf_var(t);
v->linkage = linkage;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/*
@@ -2244,7 +2214,7 @@ int btf__add_var(struct btf *btf, const char *name, int linkage, int type_id)
int btf__add_datasec(struct btf *btf, const char *name, __u32 byte_sz)
{
struct btf_type *t;
- int sz, err, name_off;
+ int sz, name_off;
/* non-empty name */
if (!name || !name[0])
@@ -2267,14 +2237,7 @@ int btf__add_datasec(struct btf *btf, const char *name, __u32 byte_sz)
t->info = btf_type_info(BTF_KIND_DATASEC, 0, 0);
t->size = byte_sz;
- err = btf_add_type_idx_entry(btf, btf->hdr->type_len);
- if (err)
- return err;
-
- btf->hdr->type_len += sz;
- btf->hdr->str_off += sz;
- btf->nr_types++;
- return btf->nr_types;
+ return btf_commit_type(btf, sz);
}
/*
@@ -2296,7 +2259,7 @@ int btf__add_datasec_var_info(struct btf *btf, int var_type_id, __u32 offset, __
/* last type should be BTF_KIND_DATASEC */
if (btf->nr_types == 0)
return -EINVAL;
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
if (!btf_is_datasec(t))
return -EINVAL;
@@ -2317,7 +2280,7 @@ int btf__add_datasec_var_info(struct btf *btf, int var_type_id, __u32 offset, __
v->size = byte_sz;
/* update parent type's vlen */
- t = btf_type_by_id(btf, btf->nr_types);
+ t = btf_last_type(btf);
btf_type_inc_vlen(t);
btf->hdr->type_len += sz;
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-22 10:57:32 +0000