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-rw-r--r--kernel/trace/bpf_trace.c146
-rw-r--r--kernel/trace/fgraph.c31
-rw-r--r--kernel/trace/trace.c6
-rw-r--r--kernel/trace/trace_osnoise.c54
-rw-r--r--kernel/trace/trace_sched_wakeup.c2
-rw-r--r--kernel/trace/trace_selftest.c23
-rw-r--r--kernel/trace/trace_syscalls.c12
-rw-r--r--kernel/trace/trace_uprobe.c44
8 files changed, 134 insertions, 184 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index cd098846e251..a582cd25ca87 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -24,7 +24,6 @@
#include <linux/key.h>
#include <linux/verification.h>
#include <linux/namei.h>
-#include <linux/fileattr.h>
#include <net/bpf_sk_storage.h>
@@ -798,29 +797,6 @@ const struct bpf_func_proto bpf_task_pt_regs_proto = {
.ret_btf_id = &bpf_task_pt_regs_ids[0],
};
-BPF_CALL_2(bpf_current_task_under_cgroup, struct bpf_map *, map, u32, idx)
-{
- struct bpf_array *array = container_of(map, struct bpf_array, map);
- struct cgroup *cgrp;
-
- if (unlikely(idx >= array->map.max_entries))
- return -E2BIG;
-
- cgrp = READ_ONCE(array->ptrs[idx]);
- if (unlikely(!cgrp))
- return -EAGAIN;
-
- return task_under_cgroup_hierarchy(current, cgrp);
-}
-
-static const struct bpf_func_proto bpf_current_task_under_cgroup_proto = {
- .func = bpf_current_task_under_cgroup,
- .gpl_only = false,
- .ret_type = RET_INTEGER,
- .arg1_type = ARG_CONST_MAP_PTR,
- .arg2_type = ARG_ANYTHING,
-};
-
struct send_signal_irq_work {
struct irq_work irq_work;
struct task_struct *task;
@@ -1226,7 +1202,8 @@ static const struct bpf_func_proto bpf_get_func_arg_proto = {
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
.arg2_type = ARG_ANYTHING,
- .arg3_type = ARG_PTR_TO_LONG,
+ .arg3_type = ARG_PTR_TO_FIXED_SIZE_MEM | MEM_UNINIT | MEM_ALIGNED,
+ .arg3_size = sizeof(u64),
};
BPF_CALL_2(get_func_ret, void *, ctx, u64 *, value)
@@ -1242,7 +1219,8 @@ static const struct bpf_func_proto bpf_get_func_ret_proto = {
.func = get_func_ret,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_CTX,
- .arg2_type = ARG_PTR_TO_LONG,
+ .arg2_type = ARG_PTR_TO_FIXED_SIZE_MEM | MEM_UNINIT | MEM_ALIGNED,
+ .arg2_size = sizeof(u64),
};
BPF_CALL_1(get_func_arg_cnt, void *, ctx)
@@ -1439,73 +1417,6 @@ static int __init bpf_key_sig_kfuncs_init(void)
late_initcall(bpf_key_sig_kfuncs_init);
#endif /* CONFIG_KEYS */
-/* filesystem kfuncs */
-__bpf_kfunc_start_defs();
-
-/**
- * bpf_get_file_xattr - get xattr of a file
- * @file: file to get xattr from
- * @name__str: name of the xattr
- * @value_p: output buffer of the xattr value
- *
- * Get xattr *name__str* of *file* and store the output in *value_ptr*.
- *
- * For security reasons, only *name__str* with prefix "user." is allowed.
- *
- * Return: 0 on success, a negative value on error.
- */
-__bpf_kfunc int bpf_get_file_xattr(struct file *file, const char *name__str,
- struct bpf_dynptr *value_p)
-{
- struct bpf_dynptr_kern *value_ptr = (struct bpf_dynptr_kern *)value_p;
- struct dentry *dentry;
- u32 value_len;
- void *value;
- int ret;
-
- if (strncmp(name__str, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
- return -EPERM;
-
- value_len = __bpf_dynptr_size(value_ptr);
- value = __bpf_dynptr_data_rw(value_ptr, value_len);
- if (!value)
- return -EINVAL;
-
- dentry = file_dentry(file);
- ret = inode_permission(&nop_mnt_idmap, dentry->d_inode, MAY_READ);
- if (ret)
- return ret;
- return __vfs_getxattr(dentry, dentry->d_inode, name__str, value, value_len);
-}
-
-__bpf_kfunc_end_defs();
-
-BTF_KFUNCS_START(fs_kfunc_set_ids)
-BTF_ID_FLAGS(func, bpf_get_file_xattr, KF_SLEEPABLE | KF_TRUSTED_ARGS)
-BTF_KFUNCS_END(fs_kfunc_set_ids)
-
-static int bpf_get_file_xattr_filter(const struct bpf_prog *prog, u32 kfunc_id)
-{
- if (!btf_id_set8_contains(&fs_kfunc_set_ids, kfunc_id))
- return 0;
-
- /* Only allow to attach from LSM hooks, to avoid recursion */
- return prog->type != BPF_PROG_TYPE_LSM ? -EACCES : 0;
-}
-
-static const struct btf_kfunc_id_set bpf_fs_kfunc_set = {
- .owner = THIS_MODULE,
- .set = &fs_kfunc_set_ids,
- .filter = bpf_get_file_xattr_filter,
-};
-
-static int __init bpf_fs_kfuncs_init(void)
-{
- return register_btf_kfunc_id_set(BPF_PROG_TYPE_LSM, &bpf_fs_kfunc_set);
-}
-
-late_initcall(bpf_fs_kfuncs_init);
-
static const struct bpf_func_proto *
bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
@@ -1548,8 +1459,6 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_get_numa_node_id_proto;
case BPF_FUNC_perf_event_read:
return &bpf_perf_event_read_proto;
- case BPF_FUNC_current_task_under_cgroup:
- return &bpf_current_task_under_cgroup_proto;
case BPF_FUNC_get_prandom_u32:
return &bpf_get_prandom_u32_proto;
case BPF_FUNC_probe_write_user:
@@ -1578,6 +1487,8 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_cgrp_storage_get_proto;
case BPF_FUNC_cgrp_storage_delete:
return &bpf_cgrp_storage_delete_proto;
+ case BPF_FUNC_current_task_under_cgroup:
+ return &bpf_current_task_under_cgroup_proto;
#endif
case BPF_FUNC_send_signal:
return &bpf_send_signal_proto;
@@ -1598,7 +1509,8 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
case BPF_FUNC_jiffies64:
return &bpf_jiffies64_proto;
case BPF_FUNC_get_task_stack:
- return &bpf_get_task_stack_proto;
+ return prog->sleepable ? &bpf_get_task_stack_sleepable_proto
+ : &bpf_get_task_stack_proto;
case BPF_FUNC_copy_from_user:
return &bpf_copy_from_user_proto;
case BPF_FUNC_copy_from_user_task:
@@ -1654,7 +1566,7 @@ kprobe_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
case BPF_FUNC_get_stackid:
return &bpf_get_stackid_proto;
case BPF_FUNC_get_stack:
- return &bpf_get_stack_proto;
+ return prog->sleepable ? &bpf_get_stack_sleepable_proto : &bpf_get_stack_proto;
#ifdef CONFIG_BPF_KPROBE_OVERRIDE
case BPF_FUNC_override_return:
return &bpf_override_return_proto;
@@ -3160,6 +3072,7 @@ struct bpf_uprobe {
loff_t offset;
unsigned long ref_ctr_offset;
u64 cookie;
+ struct uprobe *uprobe;
struct uprobe_consumer consumer;
};
@@ -3178,15 +3091,15 @@ struct bpf_uprobe_multi_run_ctx {
struct bpf_uprobe *uprobe;
};
-static void bpf_uprobe_unregister(struct path *path, struct bpf_uprobe *uprobes,
- u32 cnt)
+static void bpf_uprobe_unregister(struct bpf_uprobe *uprobes, u32 cnt)
{
u32 i;
- for (i = 0; i < cnt; i++) {
- uprobe_unregister(d_real_inode(path->dentry), uprobes[i].offset,
- &uprobes[i].consumer);
- }
+ for (i = 0; i < cnt; i++)
+ uprobe_unregister_nosync(uprobes[i].uprobe, &uprobes[i].consumer);
+
+ if (cnt)
+ uprobe_unregister_sync();
}
static void bpf_uprobe_multi_link_release(struct bpf_link *link)
@@ -3194,7 +3107,7 @@ static void bpf_uprobe_multi_link_release(struct bpf_link *link)
struct bpf_uprobe_multi_link *umulti_link;
umulti_link = container_of(link, struct bpf_uprobe_multi_link, link);
- bpf_uprobe_unregister(&umulti_link->path, umulti_link->uprobes, umulti_link->cnt);
+ bpf_uprobe_unregister(umulti_link->uprobes, umulti_link->cnt);
if (umulti_link->task)
put_task_struct(umulti_link->task);
path_put(&umulti_link->path);
@@ -3298,7 +3211,7 @@ static int uprobe_prog_run(struct bpf_uprobe *uprobe,
struct bpf_run_ctx *old_run_ctx;
int err = 0;
- if (link->task && current->mm != link->task->mm)
+ if (link->task && !same_thread_group(current, link->task))
return 0;
if (sleepable)
@@ -3322,8 +3235,7 @@ 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;
@@ -3480,22 +3392,26 @@ int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *pr
&bpf_uprobe_multi_link_lops, prog);
for (i = 0; i < cnt; i++) {
- err = uprobe_register_refctr(d_real_inode(link->path.dentry),
- uprobes[i].offset,
- uprobes[i].ref_ctr_offset,
- &uprobes[i].consumer);
- if (err) {
- bpf_uprobe_unregister(&path, uprobes, i);
- goto error_free;
+ uprobes[i].uprobe = uprobe_register(d_real_inode(link->path.dentry),
+ uprobes[i].offset,
+ uprobes[i].ref_ctr_offset,
+ &uprobes[i].consumer);
+ if (IS_ERR(uprobes[i].uprobe)) {
+ err = PTR_ERR(uprobes[i].uprobe);
+ link->cnt = i;
+ goto error_unregister;
}
}
err = bpf_link_prime(&link->link, &link_primer);
if (err)
- goto error_free;
+ goto error_unregister;
return bpf_link_settle(&link_primer);
+error_unregister:
+ bpf_uprobe_unregister(uprobes, link->cnt);
+
error_free:
kvfree(uprobes);
kfree(link);
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index d1d5ea2d0a1b..d7d4fb403f6f 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c
@@ -1206,18 +1206,24 @@ static void init_task_vars(int idx)
read_unlock(&tasklist_lock);
}
-static void ftrace_graph_enable_direct(bool enable_branch)
+static void ftrace_graph_enable_direct(bool enable_branch, struct fgraph_ops *gops)
{
trace_func_graph_ent_t func = NULL;
trace_func_graph_ret_t retfunc = NULL;
int i;
- for_each_set_bit(i, &fgraph_array_bitmask,
- sizeof(fgraph_array_bitmask) * BITS_PER_BYTE) {
- func = fgraph_array[i]->entryfunc;
- retfunc = fgraph_array[i]->retfunc;
- fgraph_direct_gops = fgraph_array[i];
- }
+ if (gops) {
+ func = gops->entryfunc;
+ retfunc = gops->retfunc;
+ fgraph_direct_gops = gops;
+ } else {
+ for_each_set_bit(i, &fgraph_array_bitmask,
+ sizeof(fgraph_array_bitmask) * BITS_PER_BYTE) {
+ func = fgraph_array[i]->entryfunc;
+ retfunc = fgraph_array[i]->retfunc;
+ fgraph_direct_gops = fgraph_array[i];
+ }
+ }
if (WARN_ON_ONCE(!func))
return;
@@ -1256,8 +1262,6 @@ int register_ftrace_graph(struct fgraph_ops *gops)
ret = -ENOSPC;
goto out;
}
-
- fgraph_array[i] = gops;
gops->idx = i;
ftrace_graph_active++;
@@ -1266,7 +1270,7 @@ int register_ftrace_graph(struct fgraph_ops *gops)
ftrace_graph_disable_direct(true);
if (ftrace_graph_active == 1) {
- ftrace_graph_enable_direct(false);
+ ftrace_graph_enable_direct(false, gops);
register_pm_notifier(&ftrace_suspend_notifier);
ret = start_graph_tracing();
if (ret)
@@ -1281,14 +1285,15 @@ int register_ftrace_graph(struct fgraph_ops *gops)
} else {
init_task_vars(gops->idx);
}
-
/* Always save the function, and reset at unregistering */
gops->saved_func = gops->entryfunc;
ret = ftrace_startup_subops(&graph_ops, &gops->ops, command);
+ if (!ret)
+ fgraph_array[i] = gops;
+
error:
if (ret) {
- fgraph_array[i] = &fgraph_stub;
ftrace_graph_active--;
gops->saved_func = NULL;
fgraph_lru_release_index(i);
@@ -1324,7 +1329,7 @@ void unregister_ftrace_graph(struct fgraph_ops *gops)
ftrace_shutdown_subops(&graph_ops, &gops->ops, command);
if (ftrace_graph_active == 1)
- ftrace_graph_enable_direct(true);
+ ftrace_graph_enable_direct(true, NULL);
else if (!ftrace_graph_active)
ftrace_graph_disable_direct(false);
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ebe7ce2f5f4a..c3b2c7dfadef 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2226,10 +2226,6 @@ static __init int init_trace_selftests(void)
}
core_initcall(init_trace_selftests);
#else
-static inline int run_tracer_selftest(struct tracer *type)
-{
- return 0;
-}
static inline int do_run_tracer_selftest(struct tracer *type)
{
return 0;
@@ -3958,6 +3954,8 @@ void tracing_iter_reset(struct trace_iterator *iter, int cpu)
break;
entries++;
ring_buffer_iter_advance(buf_iter);
+ /* This could be a big loop */
+ cond_resched();
}
per_cpu_ptr(iter->array_buffer->data, cpu)->skipped_entries = entries;
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 66a871553d4a..1439064f65d6 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -228,6 +228,11 @@ static inline struct osnoise_variables *this_cpu_osn_var(void)
return this_cpu_ptr(&per_cpu_osnoise_var);
}
+/*
+ * Protect the interface.
+ */
+static struct mutex interface_lock;
+
#ifdef CONFIG_TIMERLAT_TRACER
/*
* Runtime information for the timer mode.
@@ -259,14 +264,20 @@ static inline void tlat_var_reset(void)
{
struct timerlat_variables *tlat_var;
int cpu;
+
+ /* Synchronize with the timerlat interfaces */
+ mutex_lock(&interface_lock);
/*
* So far, all the values are initialized as 0, so
* zeroing the structure is perfect.
*/
for_each_cpu(cpu, cpu_online_mask) {
tlat_var = per_cpu_ptr(&per_cpu_timerlat_var, cpu);
+ if (tlat_var->kthread)
+ hrtimer_cancel(&tlat_var->timer);
memset(tlat_var, 0, sizeof(*tlat_var));
}
+ mutex_unlock(&interface_lock);
}
#else /* CONFIG_TIMERLAT_TRACER */
#define tlat_var_reset() do {} while (0)
@@ -332,11 +343,6 @@ struct timerlat_sample {
#endif
/*
- * Protect the interface.
- */
-static struct mutex interface_lock;
-
-/*
* Tracer data.
*/
static struct osnoise_data {
@@ -1535,7 +1541,7 @@ static int run_osnoise(void)
* This will eventually cause unwarranted noise as PREEMPT_RCU
* will force preemption as the means of ending the current
* grace period. We avoid this problem by calling
- * rcu_momentary_dyntick_idle(), which performs a zero duration
+ * rcu_momentary_eqs(), which performs a zero duration
* EQS allowing PREEMPT_RCU to end the current grace period.
* This call shouldn't be wrapped inside an RCU critical
* section.
@@ -1547,7 +1553,7 @@ static int run_osnoise(void)
if (!disable_irq)
local_irq_disable();
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
if (!disable_irq)
local_irq_enable();
@@ -1612,6 +1618,7 @@ out:
static struct cpumask osnoise_cpumask;
static struct cpumask save_cpumask;
+static struct cpumask kthread_cpumask;
/*
* osnoise_sleep - sleep until the next period
@@ -1675,6 +1682,7 @@ static inline int osnoise_migration_pending(void)
*/
mutex_lock(&interface_lock);
this_cpu_osn_var()->kthread = NULL;
+ cpumask_clear_cpu(smp_processor_id(), &kthread_cpumask);
mutex_unlock(&interface_lock);
return 1;
@@ -1945,11 +1953,16 @@ static void stop_kthread(unsigned int cpu)
{
struct task_struct *kthread;
+ mutex_lock(&interface_lock);
kthread = per_cpu(per_cpu_osnoise_var, cpu).kthread;
if (kthread) {
- if (test_bit(OSN_WORKLOAD, &osnoise_options)) {
+ per_cpu(per_cpu_osnoise_var, cpu).kthread = NULL;
+ mutex_unlock(&interface_lock);
+
+ if (cpumask_test_and_clear_cpu(cpu, &kthread_cpumask) &&
+ !WARN_ON(!test_bit(OSN_WORKLOAD, &osnoise_options))) {
kthread_stop(kthread);
- } else {
+ } else if (!WARN_ON(test_bit(OSN_WORKLOAD, &osnoise_options))) {
/*
* This is a user thread waiting on the timerlat_fd. We need
* to close all users, and the best way to guarantee this is
@@ -1958,8 +1971,8 @@ static void stop_kthread(unsigned int cpu)
kill_pid(kthread->thread_pid, SIGKILL, 1);
put_task_struct(kthread);
}
- per_cpu(per_cpu_osnoise_var, cpu).kthread = NULL;
} else {
+ mutex_unlock(&interface_lock);
/* if no workload, just return */
if (!test_bit(OSN_WORKLOAD, &osnoise_options)) {
/*
@@ -1967,7 +1980,6 @@ static void stop_kthread(unsigned int cpu)
*/
per_cpu(per_cpu_osnoise_var, cpu).sampling = false;
barrier();
- return;
}
}
}
@@ -1982,12 +1994,8 @@ static void stop_per_cpu_kthreads(void)
{
int cpu;
- cpus_read_lock();
-
- for_each_online_cpu(cpu)
+ for_each_possible_cpu(cpu)
stop_kthread(cpu);
-
- cpus_read_unlock();
}
/*
@@ -2021,6 +2029,7 @@ static int start_kthread(unsigned int cpu)
}
per_cpu(per_cpu_osnoise_var, cpu).kthread = kthread;
+ cpumask_set_cpu(cpu, &kthread_cpumask);
return 0;
}
@@ -2048,8 +2057,16 @@ static int start_per_cpu_kthreads(void)
*/
cpumask_and(current_mask, cpu_online_mask, &osnoise_cpumask);
- for_each_possible_cpu(cpu)
+ for_each_possible_cpu(cpu) {
+ if (cpumask_test_and_clear_cpu(cpu, &kthread_cpumask)) {
+ struct task_struct *kthread;
+
+ kthread = per_cpu(per_cpu_osnoise_var, cpu).kthread;
+ if (!WARN_ON(!kthread))
+ kthread_stop(kthread);
+ }
per_cpu(per_cpu_osnoise_var, cpu).kthread = NULL;
+ }
for_each_cpu(cpu, current_mask) {
retval = start_kthread(cpu);
@@ -2579,7 +2596,8 @@ static int timerlat_fd_release(struct inode *inode, struct file *file)
osn_var = per_cpu_ptr(&per_cpu_osnoise_var, cpu);
tlat_var = per_cpu_ptr(&per_cpu_timerlat_var, cpu);
- hrtimer_cancel(&tlat_var->timer);
+ if (tlat_var->kthread)
+ hrtimer_cancel(&tlat_var->timer);
memset(tlat_var, 0, sizeof(*tlat_var));
osn_var->sampling = 0;
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 130ca7e7787e..ae2ace5e515a 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -547,7 +547,7 @@ probe_wakeup(void *ignore, struct task_struct *p)
* - wakeup_dl handles tasks belonging to sched_dl class only.
*/
if (tracing_dl || (wakeup_dl && !dl_task(p)) ||
- (wakeup_rt && !dl_task(p) && !rt_task(p)) ||
+ (wakeup_rt && !rt_or_dl_task(p)) ||
(!dl_task(p) && (p->prio >= wakeup_prio || p->prio >= current->prio)))
return;
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 97f1e4bc47dc..c4ad7cd7e778 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -942,7 +942,7 @@ static __init int test_graph_storage_multi(void)
{
struct fgraph_fixture *fixture;
bool printed = false;
- int i, ret;
+ int i, j, ret;
pr_cont("PASSED\n");
pr_info("Testing multiple fgraph storage on a function: ");
@@ -953,22 +953,35 @@ static __init int test_graph_storage_multi(void)
if (ret && ret != -ENODEV) {
pr_cont("*Could not set filter* ");
printed = true;
- goto out;
+ goto out2;
}
+ }
+ for (j = 0; j < ARRAY_SIZE(store_bytes); j++) {
+ fixture = &store_bytes[j];
ret = register_ftrace_graph(&fixture->gops);
if (ret) {
pr_warn("Failed to init store_bytes fgraph tracing\n");
printed = true;
- goto out;
+ goto out1;
}
}
DYN_FTRACE_TEST_NAME();
-out:
+out1:
+ while (--j >= 0) {
+ fixture = &store_bytes[j];
+ unregister_ftrace_graph(&fixture->gops);
+
+ if (fixture->error_str && !printed) {
+ pr_cont("*** %s ***", fixture->error_str);
+ printed = true;
+ }
+ }
+out2:
while (--i >= 0) {
fixture = &store_bytes[i];
- unregister_ftrace_graph(&fixture->gops);
+ ftrace_free_filter(&fixture->gops.ops);
if (fixture->error_str && !printed) {
pr_cont("*** %s ***", fixture->error_str);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 9c581d6da843..785733245ead 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -564,6 +564,7 @@ static int perf_call_bpf_enter(struct trace_event_call *call, struct pt_regs *re
BUILD_BUG_ON(sizeof(param.ent) < sizeof(void *));
/* bpf prog requires 'regs' to be the first member in the ctx (a.k.a. &param) */
+ perf_fetch_caller_regs(regs);
*(struct pt_regs **)&param = regs;
param.syscall_nr = rec->nr;
for (i = 0; i < sys_data->nb_args; i++)
@@ -575,6 +576,7 @@ static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id)
{
struct syscall_metadata *sys_data;
struct syscall_trace_enter *rec;
+ struct pt_regs *fake_regs;
struct hlist_head *head;
unsigned long args[6];
bool valid_prog_array;
@@ -602,7 +604,7 @@ static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id)
size = ALIGN(size + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
- rec = perf_trace_buf_alloc(size, NULL, &rctx);
+ rec = perf_trace_buf_alloc(size, &fake_regs, &rctx);
if (!rec)
return;
@@ -611,7 +613,7 @@ static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id)
memcpy(&rec->args, args, sizeof(unsigned long) * sys_data->nb_args);
if ((valid_prog_array &&
- !perf_call_bpf_enter(sys_data->enter_event, regs, sys_data, rec)) ||
+ !perf_call_bpf_enter(sys_data->enter_event, fake_regs, sys_data, rec)) ||
hlist_empty(head)) {
perf_swevent_put_recursion_context(rctx);
return;
@@ -666,6 +668,7 @@ static int perf_call_bpf_exit(struct trace_event_call *call, struct pt_regs *reg
} __aligned(8) param;
/* bpf prog requires 'regs' to be the first member in the ctx (a.k.a. &param) */
+ perf_fetch_caller_regs(regs);
*(struct pt_regs **)&param = regs;
param.syscall_nr = rec->nr;
param.ret = rec->ret;
@@ -676,6 +679,7 @@ static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
{
struct syscall_metadata *sys_data;
struct syscall_trace_exit *rec;
+ struct pt_regs *fake_regs;
struct hlist_head *head;
bool valid_prog_array;
int syscall_nr;
@@ -701,7 +705,7 @@ static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
size = ALIGN(sizeof(*rec) + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
- rec = perf_trace_buf_alloc(size, NULL, &rctx);
+ rec = perf_trace_buf_alloc(size, &fake_regs, &rctx);
if (!rec)
return;
@@ -709,7 +713,7 @@ static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
rec->ret = syscall_get_return_value(current, regs);
if ((valid_prog_array &&
- !perf_call_bpf_exit(sys_data->exit_event, regs, rec)) ||
+ !perf_call_bpf_exit(sys_data->exit_event, fake_regs, rec)) ||
hlist_empty(head)) {
perf_swevent_put_recursion_context(rctx);
return;
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index c98e3b3386ba..f7443e996b1b 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -58,8 +58,8 @@ struct trace_uprobe {
struct dyn_event devent;
struct uprobe_consumer consumer;
struct path path;
- struct inode *inode;
char *filename;
+ struct uprobe *uprobe;
unsigned long offset;
unsigned long ref_ctr_offset;
unsigned long nhit;
@@ -1078,43 +1078,40 @@ 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)
{
- int ret;
+ struct inode *inode = d_real_inode(tu->path.dentry);
+ struct uprobe *uprobe;
tu->consumer.filter = filter;
- tu->inode = d_real_inode(tu->path.dentry);
-
- if (tu->ref_ctr_offset)
- ret = uprobe_register_refctr(tu->inode, tu->offset,
- tu->ref_ctr_offset, &tu->consumer);
- else
- ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);
+ uprobe = uprobe_register(inode, tu->offset, tu->ref_ctr_offset, &tu->consumer);
+ if (IS_ERR(uprobe))
+ return PTR_ERR(uprobe);
- if (ret)
- tu->inode = NULL;
-
- return ret;
+ tu->uprobe = uprobe;
+ return 0;
}
static void __probe_event_disable(struct trace_probe *tp)
{
struct trace_uprobe *tu;
+ bool sync = false;
tu = container_of(tp, struct trace_uprobe, tp);
WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));
list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
- if (!tu->inode)
+ if (!tu->uprobe)
continue;
- uprobe_unregister(tu->inode, tu->offset, &tu->consumer);
- tu->inode = NULL;
+ uprobe_unregister_nosync(tu->uprobe, &tu->consumer);
+ sync = true;
+ tu->uprobe = NULL;
}
+ if (sync)
+ uprobe_unregister_sync();
}
static int probe_event_enable(struct trace_event_call *call,
@@ -1310,7 +1307,7 @@ static int uprobe_perf_close(struct trace_event_call *call,
return 0;
list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
- ret = uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);
+ ret = uprobe_apply(tu->uprobe, &tu->consumer, false);
if (ret)
break;
}
@@ -1334,7 +1331,7 @@ static int uprobe_perf_open(struct trace_event_call *call,
return 0;
list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {
- err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);
+ err = uprobe_apply(tu->uprobe, &tu->consumer, true);
if (err) {
uprobe_perf_close(call, event);
break;
@@ -1344,8 +1341,7 @@ 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;
@@ -1431,7 +1427,7 @@ 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))
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-23 16:18:29 +0000