Bluetooth: introduce DEFINE_SHOW_ATTRIBUTE() macro

This macro deduplicates a lot of similar code across the hci_debugfs.c
module. Targeting to be moved to seq_file.h eventually.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 18 insertions, 166 deletions

diff --git a/net/bluetooth/hci_debugfs.c b/net/bluetooth/hci_debugfs.c
index e204bfdb5ba2..57403bd567d0 100644
--- a/net/bluetooth/hci_debugfs.c
+++ b/net/bluetooth/hci_debugfs.c
@@ -88,6 +88,9 @@ static int __name ## _show(struct seq_file *f, void *ptr)		      \
         return 0;                                                             \
 }                                                                             \
                                                                               \
+DEFINE_SHOW_ATTRIBUTE(__name)
+
+#define DEFINE_SHOW_ATTRIBUTE(__name)                                         \
 static int __name ## _open(struct inode *inode, struct file *file)            \
 {                                                                             \
         return single_open(file, __name ## _show, inode->i_private);          \
@@ -115,17 +118,7 @@ static int features_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int features_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, features_show, inode->i_private);
-}
-
-static const struct file_operations features_fops = {
-        .open           = features_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(features);
 
 static int device_id_show(struct seq_file *f, void *ptr)
 {
@@ -139,17 +132,7 @@ static int device_id_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int device_id_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, device_id_show, inode->i_private);
-}
-
-static const struct file_operations device_id_fops = {
-        .open           = device_id_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(device_id);
 
 static int device_list_show(struct seq_file *f, void *ptr)
 {
@@ -169,17 +152,7 @@ static int device_list_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int device_list_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, device_list_show, inode->i_private);
-}
-
-static const struct file_operations device_list_fops = {
-        .open           = device_list_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(device_list);
 
 static int blacklist_show(struct seq_file *f, void *p)
 {
@@ -194,17 +167,7 @@ static int blacklist_show(struct seq_file *f, void *p)
         return 0;
 }
 
-static int blacklist_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, blacklist_show, inode->i_private);
-}
-
-static const struct file_operations blacklist_fops = {
-        .open           = blacklist_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(blacklist);
 
 static int uuids_show(struct seq_file *f, void *p)
 {
@@ -229,17 +192,7 @@ static int uuids_show(struct seq_file *f, void *p)
        return 0;
 }
 
-static int uuids_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, uuids_show, inode->i_private);
-}
-
-static const struct file_operations uuids_fops = {
-        .open           = uuids_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(uuids);
 
 static int remote_oob_show(struct seq_file *f, void *ptr)
 {
@@ -258,17 +211,7 @@ static int remote_oob_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int remote_oob_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, remote_oob_show, inode->i_private);
-}
-
-static const struct file_operations remote_oob_fops = {
-        .open           = remote_oob_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(remote_oob);
 
 static int conn_info_min_age_set(void *data, u64 val)
 {
@@ -432,17 +375,7 @@ static int inquiry_cache_show(struct seq_file *f, void *p)
         return 0;
 }
 
-static int inquiry_cache_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, inquiry_cache_show, inode->i_private);
-}
-
-static const struct file_operations inquiry_cache_fops = {
-        .open           = inquiry_cache_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(inquiry_cache);
 
 static int link_keys_show(struct seq_file *f, void *ptr)
 {
@@ -458,17 +391,7 @@ static int link_keys_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int link_keys_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, link_keys_show, inode->i_private);
-}
-
-static const struct file_operations link_keys_fops = {
-        .open           = link_keys_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(link_keys);
 
 static int dev_class_show(struct seq_file *f, void *ptr)
 {
@@ -482,17 +405,7 @@ static int dev_class_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int dev_class_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, dev_class_show, inode->i_private);
-}
-
-static const struct file_operations dev_class_fops = {
-        .open           = dev_class_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(dev_class);
 
 static int voice_setting_get(void *data, u64 *val)
 {
@@ -681,17 +594,7 @@ static int identity_show(struct seq_file *f, void *p)
         return 0;
 }
 
-static int identity_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, identity_show, inode->i_private);
-}
-
-static const struct file_operations identity_fops = {
-        .open           = identity_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(identity);
 
 static int rpa_timeout_set(void *data, u64 val)
 {
@@ -735,17 +638,7 @@ static int random_address_show(struct seq_file *f, void *p)
         return 0;
 }
 
-static int random_address_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, random_address_show, inode->i_private);
-}
-
-static const struct file_operations random_address_fops = {
-        .open           = random_address_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(random_address);
 
 static int static_address_show(struct seq_file *f, void *p)
 {
@@ -758,17 +651,7 @@ static int static_address_show(struct seq_file *f, void *p)
         return 0;
 }
 
-static int static_address_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, static_address_show, inode->i_private);
-}
-
-static const struct file_operations static_address_fops = {
-        .open           = static_address_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(static_address);
 
 static ssize_t force_static_address_read(struct file *file,
                                          char __user *user_buf,
@@ -830,17 +713,7 @@ static int white_list_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int white_list_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, white_list_show, inode->i_private);
-}
-
-static const struct file_operations white_list_fops = {
-        .open           = white_list_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(white_list);
 
 static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
 {
@@ -858,18 +731,7 @@ static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int identity_resolving_keys_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, identity_resolving_keys_show,
-                           inode->i_private);
-}
-
-static const struct file_operations identity_resolving_keys_fops = {
-        .open           = identity_resolving_keys_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(identity_resolving_keys);
 
 static int long_term_keys_show(struct seq_file *f, void *ptr)
 {
@@ -887,17 +749,7 @@ static int long_term_keys_show(struct seq_file *f, void *ptr)
         return 0;
 }
 
-static int long_term_keys_open(struct inode *inode, struct file *file)
-{
-        return single_open(file, long_term_keys_show, inode->i_private);
-}
-
-static const struct file_operations long_term_keys_fops = {
-        .open           = long_term_keys_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(long_term_keys);
 
 static int conn_min_interval_set(void *data, u64 val)
 {