1 files changed, 0 insertions, 294 deletions
diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c
deleted file mode 100644
index b80437971d80..000000000000
--- a/tools/perf/examples/bpf/augmented_raw_syscalls.c
+++ /dev/null
@@ -1,294 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Augment the raw_syscalls tracepoints with the contents of the pointer arguments.
- *
- * Test it with:
- *
- * perf trace -e tools/perf/examples/bpf/augmented_raw_syscalls.c cat /etc/passwd > /dev/null
- *
- * This exactly matches what is marshalled into the raw_syscall:sys_enter
- * payload expected by the 'perf trace' beautifiers.
- *
- * For now it just uses the existing tracepoint augmentation code in 'perf
- * trace', in the next csets we'll hook up these with the sys_enter/sys_exit
- * code that will combine entry/exit in a strace like way.
- */
-
-#include <unistd.h>
-#include <linux/limits.h>
-#include <linux/socket.h>
-#include <pid_filter.h>
-
-/* bpf-output associated map */
-bpf_map(__augmented_syscalls__, PERF_EVENT_ARRAY, int, u32, __NR_CPUS__);
-
-/*
- * string_args_len: one per syscall arg, 0 means not a string or don't copy it,
- * 		    PATH_MAX for copying everything, any other value to limit
- * 		    it a la 'strace -s strsize'.
- */
-struct syscall {
-	bool	enabled;
-	u16	string_args_len[6];
-};
-
-bpf_map(syscalls, ARRAY, int, struct syscall, 512);
-
-/*
- * What to augment at entry?
- *
- * Pointer arg payloads (filenames, etc) passed from userspace to the kernel
- */
-bpf_map(syscalls_sys_enter, PROG_ARRAY, u32, u32, 512);
-
-/*
- * What to augment at exit?
- *
- * Pointer arg payloads returned from the kernel (struct stat, etc) to userspace.
- */
-bpf_map(syscalls_sys_exit, PROG_ARRAY, u32, u32, 512);
-
-struct syscall_enter_args {
-	unsigned long long common_tp_fields;
-	long		   syscall_nr;
-	unsigned long	   args[6];
-};
-
-struct syscall_exit_args {
-	unsigned long long common_tp_fields;
-	long		   syscall_nr;
-	long		   ret;
-};
-
-struct augmented_arg {
-	unsigned int	size;
-	int		err;
-	char		value[PATH_MAX];
-};
-
-pid_filter(pids_filtered);
-
-struct augmented_args_payload {
-       struct syscall_enter_args args;
-       union {
-		struct {
-			struct augmented_arg arg, arg2;
-		};
-		struct sockaddr_storage saddr;
-	};
-};
-
-// We need more tmp space than the BPF stack can give us
-bpf_map(augmented_args_tmp, PERCPU_ARRAY, int, struct augmented_args_payload, 1);
-
-static inline struct augmented_args_payload *augmented_args_payload(void)
-{
-	int key = 0;
-	return bpf_map_lookup_elem(&augmented_args_tmp, &key);
-}
-
-static inline int augmented__output(void *ctx, struct augmented_args_payload *args, int len)
-{
-	/* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
-	return perf_event_output(ctx, &__augmented_syscalls__, BPF_F_CURRENT_CPU, args, len);
-}
-
-static inline
-unsigned int augmented_arg__read_str(struct augmented_arg *augmented_arg, const void *arg, unsigned int arg_len)
-{
-	unsigned int augmented_len = sizeof(*augmented_arg);
-	int string_len = probe_read_str(&augmented_arg->value, arg_len, arg);
-
-	augmented_arg->size = augmented_arg->err = 0;
-	/*
-	 * probe_read_str may return < 0, e.g. -EFAULT
-	 * So we leave that in the augmented_arg->size that userspace will
-	 */
-	if (string_len > 0) {
-		augmented_len -= sizeof(augmented_arg->value) - string_len;
-		augmented_len &= sizeof(augmented_arg->value) - 1;
-		augmented_arg->size = string_len;
-	} else {
-		/*
-		 * So that username notice the error while still being able
-		 * to skip this augmented arg record
-		 */
-		augmented_arg->err = string_len;
-		augmented_len = offsetof(struct augmented_arg, value);
-	}
-
-	return augmented_len;
-}
-
-SEC("!raw_syscalls:unaugmented")
-int syscall_unaugmented(struct syscall_enter_args *args)
-{
-	return 1;
-}
-
-/*
- * These will be tail_called from SEC("raw_syscalls:sys_enter"), so will find in
- * augmented_args_tmp what was read by that raw_syscalls:sys_enter and go
- * on from there, reading the first syscall arg as a string, i.e. open's
- * filename.
- */
-SEC("!syscalls:sys_enter_connect")
-int sys_enter_connect(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args = augmented_args_payload();
-	const void *sockaddr_arg = (const void *)args->args[1];
-	unsigned int socklen = args->args[2];
-	unsigned int len = sizeof(augmented_args->args);
-
-        if (augmented_args == NULL)
-                return 1; /* Failure: don't filter */
-
-	if (socklen > sizeof(augmented_args->saddr))
-		socklen = sizeof(augmented_args->saddr);
-
-	probe_read(&augmented_args->saddr, socklen, sockaddr_arg);
-
-	return augmented__output(args, augmented_args, len + socklen);
-}
-
-SEC("!syscalls:sys_enter_sendto")
-int sys_enter_sendto(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args = augmented_args_payload();
-	const void *sockaddr_arg = (const void *)args->args[4];
-	unsigned int socklen = args->args[5];
-	unsigned int len = sizeof(augmented_args->args);
-
-        if (augmented_args == NULL)
-                return 1; /* Failure: don't filter */
-
-	if (socklen > sizeof(augmented_args->saddr))
-		socklen = sizeof(augmented_args->saddr);
-
-	probe_read(&augmented_args->saddr, socklen, sockaddr_arg);
-
-	return augmented__output(args, augmented_args, len + socklen);
-}
-
-SEC("!syscalls:sys_enter_open")
-int sys_enter_open(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args = augmented_args_payload();
-	const void *filename_arg = (const void *)args->args[0];
-	unsigned int len = sizeof(augmented_args->args);
-
-        if (augmented_args == NULL)
-                return 1; /* Failure: don't filter */
-
-	len += augmented_arg__read_str(&augmented_args->arg, filename_arg, sizeof(augmented_args->arg.value));
-
-	return augmented__output(args, augmented_args, len);
-}
-
-SEC("!syscalls:sys_enter_openat")
-int sys_enter_openat(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args = augmented_args_payload();
-	const void *filename_arg = (const void *)args->args[1];
-	unsigned int len = sizeof(augmented_args->args);
-
-        if (augmented_args == NULL)
-                return 1; /* Failure: don't filter */
-
-	len += augmented_arg__read_str(&augmented_args->arg, filename_arg, sizeof(augmented_args->arg.value));
-
-	return augmented__output(args, augmented_args, len);
-}
-
-SEC("!syscalls:sys_enter_rename")
-int sys_enter_rename(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args = augmented_args_payload();
-	const void *oldpath_arg = (const void *)args->args[0],
-		   *newpath_arg = (const void *)args->args[1];
-	unsigned int len = sizeof(augmented_args->args), oldpath_len;
-
-        if (augmented_args == NULL)
-                return 1; /* Failure: don't filter */
-
-	oldpath_len = augmented_arg__read_str(&augmented_args->arg, oldpath_arg, sizeof(augmented_args->arg.value));
-	len += oldpath_len + augmented_arg__read_str((void *)(&augmented_args->arg) + oldpath_len, newpath_arg, sizeof(augmented_args->arg.value));
-
-	return augmented__output(args, augmented_args, len);
-}
-
-SEC("!syscalls:sys_enter_renameat")
-int sys_enter_renameat(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args = augmented_args_payload();
-	const void *oldpath_arg = (const void *)args->args[1],
-		   *newpath_arg = (const void *)args->args[3];
-	unsigned int len = sizeof(augmented_args->args), oldpath_len;
-
-        if (augmented_args == NULL)
-                return 1; /* Failure: don't filter */
-
-	oldpath_len = augmented_arg__read_str(&augmented_args->arg, oldpath_arg, sizeof(augmented_args->arg.value));
-	len += oldpath_len + augmented_arg__read_str((void *)(&augmented_args->arg) + oldpath_len, newpath_arg, sizeof(augmented_args->arg.value));
-
-	return augmented__output(args, augmented_args, len);
-}
-
-SEC("raw_syscalls:sys_enter")
-int sys_enter(struct syscall_enter_args *args)
-{
-	struct augmented_args_payload *augmented_args;
-	/*
-	 * We start len, the amount of data that will be in the perf ring
-	 * buffer, if this is not filtered out by one of pid_filter__has(),
-	 * syscall->enabled, etc, with the non-augmented raw syscall payload,
-	 * i.e. sizeof(augmented_args->args).
-	 *
-	 * We'll add to this as we add augmented syscalls right after that
-	 * initial, non-augmented raw_syscalls:sys_enter payload.
-	 */
-	unsigned int len = sizeof(augmented_args->args);
-	struct syscall *syscall;
-
-	if (pid_filter__has(&pids_filtered, getpid()))
-		return 0;
-
-	augmented_args = augmented_args_payload();
-	if (augmented_args == NULL)
-		return 1;
-
-	probe_read(&augmented_args->args, sizeof(augmented_args->args), args);
-
-	/*
-	 * Jump to syscall specific augmenter, even if the default one,
-	 * "!raw_syscalls:unaugmented" that will just return 1 to return the
-	 * unagmented tracepoint payload.
-	 */
-	bpf_tail_call(args, &syscalls_sys_enter, augmented_args->args.syscall_nr);
-
-	// If not found on the PROG_ARRAY syscalls map, then we're filtering it:
-	return 0;
-}
-
-SEC("raw_syscalls:sys_exit")
-int sys_exit(struct syscall_exit_args *args)
-{
-	struct syscall_exit_args exit_args;
-
-	if (pid_filter__has(&pids_filtered, getpid()))
-		return 0;
-
-	probe_read(&exit_args, sizeof(exit_args), args);
-	/*
-	 * Jump to syscall specific return augmenter, even if the default one,
-	 * "!raw_syscalls:unaugmented" that will just return 1 to return the
-	 * unagmented tracepoint payload.
-	 */
-	bpf_tail_call(args, &syscalls_sys_exit, exit_args.syscall_nr);
-	/*
-	 * If not found on the PROG_ARRAY syscalls map, then we're filtering it:
-	 */
-	return 0;
-}
-
-license(GPL);