[PATCH 2/2] Declare debug_mask in debugfs

[Eugene Krasnikov]

Now debug_mask can be changed in runtime.

Signed-off-by: Eugene Krasnikov <k.eugene.e at gmail.com>
---
 debug.c | 37 +++++++++++++++++++++++++++++++++++++
 debug.h |  1 +
 2 files changed, 38 insertions(+)

diff --git a/debug.c b/debug.c
index 4dcaa82..529dd54 100644
--- a/debug.c
+++ b/debug.c
@@ -123,6 +123,41 @@ static const struct file_operations fops_wcn36xx_dump = {
 	.write =       write_file_dump,
 };
 
+static ssize_t read_file_debug_mask(struct file *file, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	char buf[32];
+	unsigned int len;
+	len = snprintf(buf, 32, "0x%08x\n", debug_mask);
+	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+}
+
+static ssize_t write_file_debug_mask(struct file *file,
+				    const char __user *user_buf,
+				    size_t count, loff_t *ppos)
+{
+	unsigned long mask;
+	char buf[32];
+	ssize_t len;
+
+	len = min(count, sizeof(buf) - 1);
+	if (copy_from_user(buf, user_buf, len))
+		return -EFAULT;
+
+	buf[len] = '\0';
+	if (kstrtoul(buf, 0, &mask))
+		return -EINVAL;
+
+	debug_mask = mask;
+	return count;
+}
+
+static const struct file_operations fops_wcn36xx_debug_mask = {
+	.open  =       wcn36xx_debugfs_open,
+	.read  =       read_file_debug_mask,
+	.write =       write_file_debug_mask,
+};
+
 #define ADD_FILE(name, mode, fop, priv_data)		\
 	do {							\
 		struct dentry *d;				\
@@ -150,6 +185,8 @@ void wcn36xx_debugfs_init(struct wcn36xx *wcn)
 	ADD_FILE(bmps_switcher, S_IRUSR | S_IWUSR,
 		      &fops_wcn36xx_bmps, wcn);
 	ADD_FILE(dump, S_IWUSR, &fops_wcn36xx_dump, wcn);
+	ADD_FILE(debug_mask, S_IRUSR | S_IWUSR,
+		      &fops_wcn36xx_debug_mask, wcn);
 }
 
 void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
diff --git a/debug.h b/debug.h
index 5bafc7e..3a3cf5f 100644
--- a/debug.h
+++ b/debug.h
@@ -35,6 +35,7 @@ struct wcn36xx_dfs_entry {
 	struct dentry *rootdir;
 	struct wcn36xx_dfs_file file_bmps_switcher;
 	struct wcn36xx_dfs_file file_dump;
+	struct wcn36xx_dfs_file file_debug_mask;
 };
 
 void wcn36xx_debugfs_init(struct wcn36xx *wcn);
-- 
1.7.11.3