From: Mateusz Majewski <m.majewski2@samsung.com>
Date: Wed, 7 Sep 2022 11:17:29 +0000 (+0200)
Subject: zlogger: add clear ioctl
X-Git-Tag: accepted/tizen/unified/20220921.022911~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b7db92bffebd682d5956e99689b07f18f91850a7;p=platform%2Fkernel%2Flinux-tizen-modules-source.git

zlogger: add clear ioctl

Change-Id: I44590f2cb68d6cb26c13ad56b88d1c202abf2ae2
Signed-off-by: Mateusz Majewski <m.majewski2@samsung.com>
---

diff --git a/include/uapi/linux/zlogger.h b/include/uapi/linux/zlogger.h
index 5456cbf..8fb32ce 100644
--- a/include/uapi/linux/zlogger.h
+++ b/include/uapi/linux/zlogger.h
@@ -35,6 +35,7 @@
 #define ZLOGGER_MSG_MAX (140)
 
 #define ZLOGGER_IOCTL_COMMAND_ALLOC (20745321)
+#define ZLOGGER_IOCTL_COMMAND_CLEAR (20745322)
 #define ZLOGGER_IOCTL_COMMAND_SET_DEFAULT_PRIORITY _IOW('a', 'a', uint32_t)
 #define ZLOGGER_IOCTL_COMMAND_SET_DEFAULT_TAG _IOW('a', 'b', char* )
 
diff --git a/kernel/zlogger/zlogger.c b/kernel/zlogger/zlogger.c
index ea6c99b..003e032 100644
--- a/kernel/zlogger/zlogger.c
+++ b/kernel/zlogger/zlogger.c
@@ -622,6 +622,30 @@ static long zlogger_set_default_tag(struct file *filp,  unsigned long arg)
 	return 0;
 }
 
+static long zlogger_clear(void)
+{
+	int i;
+	struct thread_table_field *ptr = NULL;
+
+	mutex_lock(&g_block_mutex);
+
+	for (i = 1; i <= ZLOGGER_BLOCK_COUNT; i++) {
+		struct zlogger_block *block = get_block(i);
+
+		memset(&block->head, 0, sizeof(block->head));
+	}
+
+	hash_for_each(g_thread_table->data, i, ptr, next) {
+		if (ptr->blk != 0) {
+			queue_push(&g_free_q, ptr->blk);
+			ptr->blk = 0;
+		}
+	}
+
+	mutex_unlock(&g_block_mutex);
+	return 0;
+}
+
 static long zlogger_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	switch (cmd) {
@@ -629,6 +653,10 @@ static long zlogger_ioctl(struct file *filp, unsigned int cmd, unsigned long arg
 			return alloc_block_for_thread(false);
 		break;
 
+		case ZLOGGER_IOCTL_COMMAND_CLEAR:
+			return zlogger_clear();
+		break;
+
 		case ZLOGGER_IOCTL_COMMAND_SET_DEFAULT_PRIORITY:
 			return zlogger_update_prio(filp, arg);
 		break;