函数逻辑报告 |
Source Code:kernel\bpf\syscall.c |
Create Date:2022-07-27 14:05:32 |
| Last Modify:2022-05-19 18:06:12 | Copyright©Brick |
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函数名称：map_lookup_and_delete_elem
函数原型：static int map_lookup_and_delete_elem(union bpf_attr *attr)
返回类型：int
参数：
| 类型 | 参数 | 名称 |
|---|---|---|
| union bpf_attr * | attr |
| 1185 | __user乘ukey等于u64_to_user_ptr(key) |
| 1186 | __user乘uvalue等于u64_to_user_ptr(value) |
| 1194 | 如果helper macro to check that unused fields 'union bpf_attr' are zero (BPF_MAP_LOOKUP_AND_DELETE_ELEM)则返回:负EINVAL |
| 1198 | map等于 error is returned, fd is released.* On success caller should complete fd access with matching fdput() |
| 1201 | 如果非map_get_sys_perms(map, f)按位与Has write method(s) 的值则 |
| 1206 | key等于__bpf_copy_key(ukey, key_size) |
| 1207 | 如果是错误则 |
| 1212 | value_size等于value_size |
| 1219 | 如果map_type恒等于BPF_MAP_TYPE_QUEUE或map_type恒等于BPF_MAP_TYPE_STACK则 |
| 1221 | err等于map_pop_elem(map, value) |
| 1222 | 否则 |
| 1223 | err等于负Operation is not supported |
| 1226 | 如果err则转到:free_value |
| 1229 | 如果copy_to_user(uvalue, value, value_size)不等于0则转到:free_value |
| 1232 | err等于0 |
| 1234 | free_value : |
| 1236 | free_key : |
| 1238 | err_put : |
| 1240 | 返回:err |
| 源代码转换工具 开放的插件接口 | X |
|---|---|
| 支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告 代码生成和批量转换代码 |