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uprobes: get rid of enum uprobe_filter_ctx in uprobe filter callbacks

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It serves no purpose beyond adding unnecessray argument passed to the
filter callback. Just get rid of it, no one is actually using it.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20240903174603.3554182-4-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2024-09-03 10:45:58 -07:00 committed by Peter Zijlstra
parent 8617408f7a
commit 59da880afe
4 changed files with 12 additions and 28 deletions
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10
include/linux/uprobes.h
View File

@ -28,20 +28,12 @@ struct page;
#define MAX_URETPROBE_DEPTH 64
enum uprobe_filter_ctx {
UPROBE_FILTER_REGISTER,
UPROBE_FILTER_UNREGISTER,
UPROBE_FILTER_MMAP,
};
struct uprobe_consumer {
int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
int (*ret_handler)(struct uprobe_consumer *self,
unsigned long func,
struct pt_regs *regs);
bool (*filter)(struct uprobe_consumer *self,
enum uprobe_filter_ctx ctx,
struct mm_struct *mm);
bool (*filter)(struct uprobe_consumer *self, struct mm_struct *mm);
struct uprobe_consumer *next;
};

18
kernel/events/uprobes.c
View File

@ -918,21 +918,19 @@ static int prepare_uprobe(struct uprobe *uprobe, struct file *file,
return ret;
}
static inline bool consumer_filter(struct uprobe_consumer *uc,
enum uprobe_filter_ctx ctx, struct mm_struct *mm)
static inline bool consumer_filter(struct uprobe_consumer *uc, struct mm_struct *mm)
{
return !uc->filter || uc->filter(uc, ctx, mm);
return !uc->filter || uc->filter(uc, mm);
}
static bool filter_chain(struct uprobe *uprobe,
enum uprobe_filter_ctx ctx, struct mm_struct *mm)
static bool filter_chain(struct uprobe *uprobe, struct mm_struct *mm)
{
struct uprobe_consumer *uc;
bool ret = false;
down_read(&uprobe->consumer_rwsem);
for (uc = uprobe->consumers; uc; uc = uc->next) {
ret = consumer_filter(uc, ctx, mm);
ret = consumer_filter(uc, mm);
if (ret)
break;
}
@ -1099,12 +1097,10 @@ register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new)
if (is_register) {
/* consult only the "caller", new consumer. */
if (consumer_filter(new,
UPROBE_FILTER_REGISTER, mm))
if (consumer_filter(new, mm))
err = install_breakpoint(uprobe, mm, vma, info->vaddr);
} else if (test_bit(MMF_HAS_UPROBES, &mm->flags)) {
if (!filter_chain(uprobe,
UPROBE_FILTER_UNREGISTER, mm))
if (!filter_chain(uprobe, mm))
err |= remove_breakpoint(uprobe, mm, info->vaddr);
}
@ -1387,7 +1383,7 @@ int uprobe_mmap(struct vm_area_struct *vma)
*/
list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) {
if (!fatal_signal_pending(current) &&
filter_chain(uprobe, UPROBE_FILTER_MMAP, vma->vm_mm)) {
filter_chain(uprobe, vma->vm_mm)) {
unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset);
install_breakpoint(uprobe, vma->vm_mm, vma, vaddr);
}

3
kernel/trace/bpf_trace.c
View File

@ -3320,8 +3320,7 @@ static int uprobe_prog_run(struct bpf_uprobe *uprobe,
}
static bool
uprobe_multi_link_filter(struct uprobe_consumer *con, enum uprobe_filter_ctx ctx,
struct mm_struct *mm)
uprobe_multi_link_filter(struct uprobe_consumer *con, struct mm_struct *mm)
{
struct bpf_uprobe *uprobe;

9
kernel/trace/trace_uprobe.c
View File

@ -1078,9 +1078,7 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e
return trace_handle_return(s);
}
typedef bool (*filter_func_t)(struct uprobe_consumer *self,
enum uprobe_filter_ctx ctx,
struct mm_struct *mm);
typedef bool (*filter_func_t)(struct uprobe_consumer *self, struct mm_struct *mm);
static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)
{
@ -1339,8 +1337,7 @@ static int uprobe_perf_open(struct trace_event_call *call,
return err;
}
static bool uprobe_perf_filter(struct uprobe_consumer *uc,
enum uprobe_filter_ctx ctx, struct mm_struct *mm)
static bool uprobe_perf_filter(struct uprobe_consumer *uc, struct mm_struct *mm)
{
struct trace_uprobe_filter *filter;
struct trace_uprobe *tu;
@ -1426,7 +1423,7 @@ static void __uprobe_perf_func(struct trace_uprobe *tu,
static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,
struct uprobe_cpu_buffer **ucbp)
{
if (!uprobe_perf_filter(&tu->consumer, 0, current->mm))
if (!uprobe_perf_filter(&tu->consumer, current->mm))
return UPROBE_HANDLER_REMOVE;
if (!is_ret_probe(tu))