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update(rule_loader): deprecate append key and add a warning

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Signed-off-by: Andrea Terzolo <andreaterzolo3@gmail.com>
This commit is contained in:
Andrea Terzolo
2024-01-03 15:40:46 +01:00
committed by poiana
parent 63736563a2
commit 4aebee684a
5 changed files with 64 additions and 22 deletions
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9
userspace/engine/falco_load_result.cpp
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@@ -66,7 +66,8 @@ static const std::string warning_codes[] = {
"LOAD_UNKNOWN_FILTER",
"LOAD_UNUSED_MACRO",
"LOAD_UNUSED_LIST",
"LOAD_UNKNOWN_ITEM"
"LOAD_UNKNOWN_ITEM",
"LOAD_DEPRECATED_ITEM"
};
const std::string& falco::load_result::warning_code_str(warning_code wc)
@@ -81,7 +82,8 @@ static const std::string warning_strings[] = {
"Unknown field or event-type in condition or output",
"Unused macro",
"Unused list",
"Unknown rules file item"
"Unknown rules file item",
"Used deprecated item"
};
const std::string& falco::load_result::warning_str(warning_code wc)
@@ -96,7 +98,8 @@ static const std::string warning_descs[] = {
"A rule condition or output refers to a field or evt.type that does not exist. This is normally an error, but if a rule has a skip-if-unknown-filter property, the error is downgraded to a warning.",
"A macro is defined in the rules content but is not used by any other macro or rule.",
"A list is defined in the rules content but is not used by any other list, macro, or rule.",
"An unknown top-level object is in the rules content. It will be ignored."
"An unknown top-level object is in the rules content. It will be ignored.",
"A deprecated item is employed by lists, macros, or rules."
};
const std::string& falco::load_result::warning_desc(warning_code wc)

3
userspace/engine/falco_load_result.h
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@@ -54,7 +54,8 @@ public:
LOAD_UNKNOWN_FILTER,
LOAD_UNUSED_MACRO,
LOAD_UNUSED_LIST,
LOAD_UNKNOWN_ITEM
LOAD_UNKNOWN_ITEM,
LOAD_DEPRECATED_ITEM
};
virtual ~load_result() = default;

40
userspace/engine/rule_loader_reader.cpp
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@@ -434,27 +434,28 @@ static void read_item(
rule_loader::context ctx(item, rule_loader::context::LIST, name, parent);
rule_loader::list_info v(ctx);
bool append = false;
bool has_append_flag = false;
decode_val(item, "list", v.name, ctx);
decode_items(item, v.items, ctx);
decode_optional_val(item, "append", append, ctx);
decode_optional_val(item, "append", has_append_flag, ctx);
if(has_append_flag)
{
cfg.res->add_warning(falco::load_result::LOAD_DEPRECATED_ITEM, WARNING_APPEND_MESSAGE, ctx);
}
std::set<std::string> override_append, override_replace;
std::set<std::string> overridable {"items"};
decode_overrides(item, overridable, overridable, override_append, override_replace, ctx);
bool has_overrides = !override_append.empty() || !override_replace.empty();
if(append == true && has_overrides)
{
THROW(true, OVERRIDE_APPEND_ERROR_MESSAGE, ctx);
}
THROW(has_append_flag && has_overrides, OVERRIDE_APPEND_ERROR_MESSAGE, ctx);
// Since a list only has items, if we have chosen to append them we can append the entire object
// otherwise we just want to redefine the list.
append |= override_append.find("items") != override_append.end();
has_append_flag |= override_append.find("items") != override_append.end();
if(append)
if(has_append_flag)
{
collector.append(cfg, v);
}
@@ -474,29 +475,30 @@ static void read_item(
rule_loader::macro_info v(ctx);
v.name = name;
bool append = false;
bool has_append_flag = false;
decode_val(item, "condition", v.cond, ctx);
// Now set the proper context for the condition now that we know it exists
v.cond_ctx = rule_loader::context(item["condition"], rule_loader::context::MACRO_CONDITION, "", ctx);
decode_optional_val(item, "append", append, ctx);
decode_optional_val(item, "append", has_append_flag, ctx);
if(has_append_flag)
{
cfg.res->add_warning(falco::load_result::LOAD_DEPRECATED_ITEM, WARNING_APPEND_MESSAGE, ctx);
}
std::set<std::string> override_append, override_replace;
std::set<std::string> overridable {"condition"};
decode_overrides(item, overridable, overridable, override_append, override_replace, ctx);
bool has_overrides = !override_append.empty() || !override_replace.empty();
if(append == true && has_overrides)
{
THROW(true, OVERRIDE_APPEND_ERROR_MESSAGE, ctx);
}
THROW((has_append_flag && has_overrides), OVERRIDE_APPEND_ERROR_MESSAGE, ctx);
// Since a macro only has a condition, if we have chosen to append to it we can append the entire object
// otherwise we just want to redefine the macro.
append |= override_append.find("condition") != override_append.end();
has_append_flag |= override_append.find("condition") != override_append.end();
if(append)
if(has_append_flag)
{
collector.append(cfg, v);
}
@@ -517,6 +519,10 @@ static void read_item(
bool has_append_flag = false;
decode_optional_val(item, "append", has_append_flag, ctx);
if(has_append_flag)
{
cfg.res->add_warning(falco::load_result::LOAD_DEPRECATED_ITEM, WARNING_APPEND_MESSAGE, ctx);
}
std::set<std::string> override_append, override_replace;
std::set<std::string> overridable_append {"condition", "output", "desc", "tags", "exceptions"};

5
userspace/engine/rule_loader_reader.h
View File

@@ -24,7 +24,10 @@ limitations under the License.
#include "falco_engine_version.h"
// Error message used when both 'override' and 'append' are specified.
#define OVERRIDE_APPEND_ERROR_MESSAGE "Keys 'override' and 'append: true' cannot be used together. Add an append entry (e.g. 'condition: append') under override instead."
#define OVERRIDE_APPEND_ERROR_MESSAGE "Keys 'override' and 'append: true' cannot be used together. Add an append entry (e.g. 'condition: append') under 'override' instead."
// Warning message used when `append` is used.
#define WARNING_APPEND_MESSAGE "'append' key is deprecated. Add an append entry (e.g. 'condition: append') under 'override' instead."
namespace rule_loader
{