tetragon: Keep map setup in doLoadProgram #2803
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Adding PinPath to Map object to carry path relative to the sysfs bpf root tetragon tree. At the moment we have map's Name as a real (bpf object) name and PinName when we need to pin map under different name. The PinName will be removed once we move to new hierarchy structure, but we still need to keep the relative pinned path of the map. Signed-off-by: Jiri Olsa <[email protected]>
We provide sysfs bpf tetragon root path as pinPathPrefix to the MapLoad's Load function, so we can provide pin path to possible inner maps that get loaded. We are going to introduce new sysfs hierarchy in following changes, where each map can be placed in specific directory, so the sysfs root is no longer enough. Passing map's PinPath through Load's function directly. Signed-off-by: Jiri Olsa <[email protected]>
Adding map type fields that specify how the map is shared and when it's placed in the sysfs hierarchy. MapTypeGlobal - under sysfs root, shared with everyone MapTypePolicy - under policy dir, shared within policy MapTypeSensor - under sensor dir, shared within sensor MapTypeProgram - under program dir, program specific MapTypeGlobal -> /sys/fs/bpf/tetragon/map-1 MapTypePolicy -> /sys/fs/bpf/tetragon/policy-name/map-2 MapTypeSensor -> /sys/fs/bpf/tetragon/policy-name/sensor-1/map-3 MapTypeProgram -> /sys/fs/bpf/tetragon/policy-name/sensor-1/prog-1/map-4 Adding just types at the moment, implementation is coming in following changes. Signed-off-by: Jiri Olsa <[email protected]>
Creating sensor directory hierarchy on sensor loading. When sensor is loading we: - create directory sysfs hierarchy for each program in the sensor - assign PinPath for each pinned map in the sensor Adding PinName to Program object to hold sysfs program name, at the moment it's initialized same way as the PinPath, but PinPath is changed when the sensor is loaded to be relative program path from sysfs tetragon root. Signed-off-by: Jiri Olsa <[email protected]>
Moving execve_calls map under execve program directory, because it's specific to the program. The rest of the base sensor maps are kept as global, because they are shared by all the other sensors. Signed-off-by: Jiri Olsa <[email protected]>
Moving generickprobe sensor maps under new hierarchy: per program maps: argfilter_maps addr4lpm_maps addr6lpm_maps string_prefix_maps string_postfix_maps kprobe_calls filter_map tg_mb_sel_opts tg_mb_paths stack_trace_map config_map retkprobe_calls override_tasks per sensor maps: fdinstall_map retprobe_map process_call_heap socktrack_map ratelimit_map Signed-off-by: Jiri Olsa <[email protected]>
Moving generictracepoint sensor maps under new hierarchy. per program maps: tp_calls filter_map argfilter_maps addr4lpm_maps addr6lpm_maps string_prefix_maps string_postfix_maps tg_mb_paths tg_mb_sel_opts per sensor maps: fdinstall_map Signed-off-by: Jiri Olsa <[email protected]>
Moving genericuprobe sensor maps under new hierarchy. per program maps: config_map uprobe_calls filter_map tg_mb_sel_opts Signed-off-by: Jiri Olsa <[email protected]>
Moving genericlsm sensor maps under new hierarchy: per program maps: config_map lsm_calls filter_map tg_mb_sel_opts tg_mb_paths argfilter_maps addr4lpm_maps addr6lpm_maps string_maps_%d string_prefix_maps string_postfix_maps process_call_heap Signed-off-by: Jiri Olsa <[email protected]>
Change the generickprobe sensor pin path for programs under sysfs hierarchy. Now the program pin looks like below, for multi kprobes: sigkilltest/gkp-sensor-1/multi_kprobe/prog sigkilltest/gkp-sensor-1/multi_retkprobe/prog for regular kprobes: sigkilltest/gkp-sensor-1/__x64_sys_lseek/prog sigkilltest/gkp-sensor-1/__x64_sys_lseek_return/prog Signed-off-by: Jiri Olsa <[email protected]>
Change the generictracepoint sensor pin path for programs under sysfs hierarchy. Now the program pin looks like below: raw-syscalls/gtp-sensor-1/raw_syscalls:sys_enter/prog Signed-off-by: Jiri Olsa <[email protected]>
Change the genericuprobe sensor pin path for programs under sysfs hierarchy. Now the program pin looks like below: uprobe/gup-sensor-1/0-readline/prog uprobe/gup-sensor-1/1-main/prog Signed-off-by: Jiri Olsa <[email protected]>
Change the genericlsm sensor pin path for programs under sysfs hierarchy. Now the program pin looks like below: lsm-file-open/glsm-sensor-1/file_open/prog Signed-off-by: Jiri Olsa <[email protected]>
Moving enforcer sensor maps under new hierarchy. per policy maps: enforcer_data Signed-off-by: Jiri Olsa <[email protected]>
Removing MapBuilderPin, because it's no longer needed and removing the pin argument from mapBuilder function. Signed-off-by: Jiri Olsa <[email protected]>
Policy name is provided by tracing-policy/user. It already has some restrictions, but let's add at least substitute for '/' characters for '_' to ensure the path is not mangled. Signed-off-by: Jiri Olsa <[email protected]>
Adjusting linkPinPath for new hierarchy to use program's PinPath directory with 'link' file name. Plus '_override' suffix for override link. Signed-off-by: Jiri Olsa <[email protected]>
Adding policy argument to SensorBuilder function so it's passed to the Sensor object. Signed-off-by: Jiri Olsa <[email protected]>
Add tests for the map builders, will be likely extended. Signed-off-by: Jiri Olsa <[email protected]>
Adding tests for map max entries setup. Signed-off-by: Jiri Olsa <[email protected]>
Adding some notes in map.go header about maps usage. Signed-off-by: Jiri Olsa <[email protected]>
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Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
With current pattern we can match functions with extra suffix while the expected function is missing, which can happen on current upstream kernel. Signed-off-by: Jiri Olsa <[email protected]>
Adding missing spaces to the message. Signed-off-by: Jiri Olsa <[email protected]>
We're missing cleanup in some kprobe tests, so we get leftovers in the tetragon directory, like: time="2024-08-17T18:01:54Z" level=info msg="`gkp-sensor-3-multi_kprobe-string_maps_5` still exists after test" time="2024-08-17T18:01:54Z" level=info msg="`gkp-sensor-3-multi_kprobe-string_maps_6` still exists after test" time="2024-08-17T18:01:54Z" level=info msg="`gkp-sensor-3-multi_kprobe-string_maps_7` still exists after test" Adding missing DeleteTracingPolicy cleanup call. Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
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