From: Jiri Olsa <jolsa@kernel.org>
To: Steven Rostedt <rostedt@kernel.org>,
Florent Revest <revest@google.com>,
Mark Rutland <mark.rutland@arm.com>
Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Menglong Dong <menglong8.dong@gmail.com>,
Song Liu <song@kernel.org>
Subject: [PATCHv4 bpf-next 3/9] ftrace: Export some of hash related functions
Date: Wed, 3 Dec 2025 09:23:56 +0100 [thread overview]
Message-ID: <20251203082402.78816-4-jolsa@kernel.org> (raw)
In-Reply-To: <20251203082402.78816-1-jolsa@kernel.org>
We are going to use these functions in following changes.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
include/linux/ftrace.h | 16 ++++++++++++++++
kernel/trace/ftrace.c | 7 +++----
kernel/trace/trace.h | 8 --------
3 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 505b7d3f5641..8c034b028af4 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -405,6 +405,22 @@ enum ftrace_ops_cmd {
typedef int (*ftrace_ops_func_t)(struct ftrace_ops *op, enum ftrace_ops_cmd cmd);
#ifdef CONFIG_DYNAMIC_FTRACE
+
+#define FTRACE_HASH_DEFAULT_BITS 10
+
+struct ftrace_hash {
+ unsigned long size_bits;
+ struct hlist_head *buckets;
+ unsigned long count;
+ unsigned long flags;
+ struct rcu_head rcu;
+};
+
+struct ftrace_hash *alloc_ftrace_hash(int size_bits);
+void free_ftrace_hash(struct ftrace_hash *hash);
+struct ftrace_func_entry *add_hash_entry_direct(struct ftrace_hash *hash,
+ unsigned long ip, unsigned long direct);
+
/* The hash used to know what functions callbacks trace */
struct ftrace_ops_hash {
struct ftrace_hash __rcu *notrace_hash;
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 7e3a81bd6f1e..84aee9096a9e 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -68,7 +68,6 @@
})
/* hash bits for specific function selection */
-#define FTRACE_HASH_DEFAULT_BITS 10
#define FTRACE_HASH_MAX_BITS 12
#ifdef CONFIG_DYNAMIC_FTRACE
@@ -1185,7 +1184,7 @@ static void __add_hash_entry(struct ftrace_hash *hash,
hash->count++;
}
-static struct ftrace_func_entry *
+struct ftrace_func_entry *
add_hash_entry_direct(struct ftrace_hash *hash, unsigned long ip, unsigned long direct)
{
struct ftrace_func_entry *entry;
@@ -1265,7 +1264,7 @@ static void clear_ftrace_mod_list(struct list_head *head)
mutex_unlock(&ftrace_lock);
}
-static void free_ftrace_hash(struct ftrace_hash *hash)
+void free_ftrace_hash(struct ftrace_hash *hash)
{
if (!hash || hash == EMPTY_HASH)
return;
@@ -1305,7 +1304,7 @@ void ftrace_free_filter(struct ftrace_ops *ops)
}
EXPORT_SYMBOL_GPL(ftrace_free_filter);
-static struct ftrace_hash *alloc_ftrace_hash(int size_bits)
+struct ftrace_hash *alloc_ftrace_hash(int size_bits)
{
struct ftrace_hash *hash;
int size;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 85eabb454bee..62e0ac625f65 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -899,14 +899,6 @@ enum {
FTRACE_HASH_FL_MOD = (1 << 0),
};
-struct ftrace_hash {
- unsigned long size_bits;
- struct hlist_head *buckets;
- unsigned long count;
- unsigned long flags;
- struct rcu_head rcu;
-};
-
struct ftrace_func_entry *
ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
--
2.52.0
next prev parent reply other threads:[~2025-12-03 8:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-03 8:23 [PATCHv4 bpf-next 0/9] ftrace,bpf: Use single direct ops for bpf trampolines Jiri Olsa
2025-12-03 8:23 ` [PATCHv4 bpf-next 1/9] ftrace,bpf: Remove FTRACE_OPS_FL_JMP ftrace_ops flag Jiri Olsa
2025-12-03 9:15 ` Menglong Dong
2025-12-03 20:23 ` Jiri Olsa
2025-12-03 8:23 ` [PATCHv4 bpf-next 2/9] ftrace: Make alloc_and_copy_ftrace_hash direct friendly Jiri Olsa
2025-12-03 8:23 ` Jiri Olsa [this message]
2025-12-03 8:23 ` [PATCHv4 bpf-next 4/9] ftrace: Add update_ftrace_direct_add function Jiri Olsa
2025-12-03 8:47 ` bot+bpf-ci
2025-12-03 20:25 ` Jiri Olsa
2025-12-03 8:23 ` [PATCHv4 bpf-next 5/9] ftrace: Add update_ftrace_direct_del function Jiri Olsa
2025-12-03 8:23 ` [PATCHv4 bpf-next 6/9] ftrace: Add update_ftrace_direct_mod function Jiri Olsa
2025-12-03 8:24 ` [PATCHv4 bpf-next 7/9] bpf: Add trampoline ip hash table Jiri Olsa
2025-12-03 8:24 ` [PATCHv4 bpf-next 8/9] ftrace: Factor ftrace_ops ops_func interface Jiri Olsa
2025-12-03 8:24 ` [PATCHv4 bpf-next 9/9] bpf,x86: Use single ftrace_ops for direct calls Jiri Olsa
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