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Sun, 25 Aug 2019 06:24:18 -0700 (PDT) From: Changbin Du To: Steven Rostedt , Ingo Molnar Subject: [PATCH 04/11] ftrace/hash: add private data field Date: Sun, 25 Aug 2019 21:23:23 +0800 Message-Id: <20190825132330.5015-5-changbin.du@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190825132330.5015-1-changbin.du@gmail.com> References: <20190825132330.5015-1-changbin.du@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190825_062419_927744_8AF28E34 X-CRM114-Status: GOOD ( 11.25 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:543 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (changbin.du[at]gmail.com) -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Jonathan Corbet , linux-parisc@vger.kernel.org, linux-doc@vger.kernel.org, linux-sh@vger.kernel.org, linux-s390@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Jessica Yu , sparclinux@vger.kernel.org, linux-kbuild@vger.kernel.org, Thomas Gleixner , linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Changbin Du Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org We will reuse ftrace_hash to lookup function prototype information. So we need an additional field to bind ftrace_func_entry to prototype information. Signed-off-by: Changbin Du --- kernel/trace/ftrace.c | 17 +++++++---------- kernel/trace/trace.h | 6 ++++++ 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index eca34503f178..a314f0768b2c 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1017,11 +1017,6 @@ static bool update_all_ops; # error Dynamic ftrace depends on MCOUNT_RECORD #endif -struct ftrace_func_entry { - struct hlist_node hlist; - unsigned long ip; -}; - struct ftrace_func_probe { struct ftrace_probe_ops *probe_ops; struct ftrace_ops ops; @@ -1169,7 +1164,8 @@ static void __add_hash_entry(struct ftrace_hash *hash, hash->count++; } -static int add_hash_entry(struct ftrace_hash *hash, unsigned long ip) +static int add_hash_entry(struct ftrace_hash *hash, unsigned long ip, + void *priv) { struct ftrace_func_entry *entry; @@ -1178,6 +1174,7 @@ static int add_hash_entry(struct ftrace_hash *hash, unsigned long ip) return -ENOMEM; entry->ip = ip; + entry->priv = priv; __add_hash_entry(hash, entry); return 0; @@ -1346,7 +1343,7 @@ alloc_and_copy_ftrace_hash(int size_bits, struct ftrace_hash *hash) size = 1 << hash->size_bits; for (i = 0; i < size; i++) { hlist_for_each_entry(entry, &hash->buckets[i], hlist) { - ret = add_hash_entry(new_hash, entry->ip); + ret = add_hash_entry(new_hash, entry->ip, NULL); if (ret < 0) goto free_hash; } @@ -3694,7 +3691,7 @@ enter_record(struct ftrace_hash *hash, struct dyn_ftrace *rec, int clear_filter) if (entry) return 0; - ret = add_hash_entry(hash, rec->ip); + ret = add_hash_entry(hash, rec->ip, NULL); } return ret; } @@ -4700,7 +4697,7 @@ ftrace_match_addr(struct ftrace_hash *hash, unsigned long ip, int remove) return 0; } - return add_hash_entry(hash, ip); + return add_hash_entry(hash, ip, NULL); } static int @@ -5380,7 +5377,7 @@ ftrace_graph_set_hash(struct ftrace_hash *hash, char *buffer) if (entry) continue; - if (add_hash_entry(hash, rec->ip) < 0) + if (add_hash_entry(hash, rec->ip, NULL) < 0) goto out; } else { if (entry) { diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 005f08629b8b..ad619c73a505 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -882,6 +882,12 @@ struct ftrace_hash { struct rcu_head rcu; }; +struct ftrace_func_entry { + struct hlist_node hlist; + unsigned long ip; + void *priv; +}; + struct ftrace_func_entry * ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);