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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20251203082402.78816-4-jolsa@kernel.org \
--to=jolsa@kernel.org \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=menglong8.dong@gmail.com \
--cc=revest@google.com \
--cc=rostedt@kernel.org \
--cc=song@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.