afs: get rid of junk in fs/afs/proc.c

kill pointless method instances and don't bother with ->owner - it's
ignored for procfs files anyway, make use of remove_proc_subtree() for
removal, get rid of cell->proc_dir.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/afs/internal.h

@@ -195,7 +195,6 @@ struct afs_cell {
 	struct list_head	link;		/* main cell list link */
 	struct key		*anonymous_key;	/* anonymous user key for this cell */
 	struct list_head	proc_link;	/* /proc cell list link */
-	struct proc_dir_entry	*proc_dir;	/* /proc dir for this cell */
 #ifdef CONFIG_AFS_FSCACHE
 	struct fscache_cookie	*cache;		/* caching cookie */
 #endif

fs/afs/proc.c

@@ -41,11 +41,8 @@ static const struct file_operations afs_proc_cells_fops = {
 	.write		= afs_proc_cells_write,
 	.llseek		= seq_lseek,
 	.release	= seq_release,
-	.owner		= THIS_MODULE,
 };
 
-static int afs_proc_rootcell_open(struct inode *inode, struct file *file);
-static int afs_proc_rootcell_release(struct inode *inode, struct file *file);
 static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
 				      size_t size, loff_t *_pos);
 static ssize_t afs_proc_rootcell_write(struct file *file,
@@ -53,17 +50,12 @@ static ssize_t afs_proc_rootcell_write(struct file *file,
 				       size_t size, loff_t *_pos);
 
 static const struct file_operations afs_proc_rootcell_fops = {
-	.open		= afs_proc_rootcell_open,
 	.read		= afs_proc_rootcell_read,
 	.write		= afs_proc_rootcell_write,
 	.llseek		= no_llseek,
-	.release	= afs_proc_rootcell_release,
-	.owner		= THIS_MODULE,
 };
 
 static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file);
-static int afs_proc_cell_volumes_release(struct inode *inode,
-					 struct file *file);
 static void *afs_proc_cell_volumes_start(struct seq_file *p, loff_t *pos);
 static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
 					loff_t *pos);
@@ -81,14 +73,11 @@ static const struct file_operations afs_proc_cell_volumes_fops = {
 	.open		= afs_proc_cell_volumes_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= afs_proc_cell_volumes_release,
-	.owner		= THIS_MODULE,
+	.release	= seq_release,
 };
 
 static int afs_proc_cell_vlservers_open(struct inode *inode,
 					struct file *file);
-static int afs_proc_cell_vlservers_release(struct inode *inode,
-					   struct file *file);
 static void *afs_proc_cell_vlservers_start(struct seq_file *p, loff_t *pos);
 static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
 					  loff_t *pos);
@@ -106,13 +95,10 @@ static const struct file_operations afs_proc_cell_vlservers_fops = {
 	.open		= afs_proc_cell_vlservers_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= afs_proc_cell_vlservers_release,
-	.owner		= THIS_MODULE,
+	.release	= seq_release,
 };
 
 static int afs_proc_cell_servers_open(struct inode *inode, struct file *file);
-static int afs_proc_cell_servers_release(struct inode *inode,
-					 struct file *file);
 static void *afs_proc_cell_servers_start(struct seq_file *p, loff_t *pos);
 static void *afs_proc_cell_servers_next(struct seq_file *p, void *v,
 					loff_t *pos);
@@ -130,8 +116,7 @@ static const struct file_operations afs_proc_cell_servers_fops = {
 	.open		= afs_proc_cell_servers_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= afs_proc_cell_servers_release,
-	.owner		= THIS_MODULE,
+	.release	= seq_release,
 };
 
 /*
@@ -139,29 +124,21 @@ static const struct file_operations afs_proc_cell_servers_fops = {
  */
 int afs_proc_init(void)
 {
-	struct proc_dir_entry *p;
-
 	_enter("");
 
 	proc_afs = proc_mkdir("fs/afs", NULL);
 	if (!proc_afs)
 		goto error_dir;
 
-	p = proc_create("cells", 0, proc_afs, &afs_proc_cells_fops);
-	if (!p)
-		goto error_cells;
-
-	p = proc_create("rootcell", 0, proc_afs, &afs_proc_rootcell_fops);
-	if (!p)
-		goto error_rootcell;
+	if (!proc_create("cells", 0, proc_afs, &afs_proc_cells_fops) ||
+	    !proc_create("rootcell", 0, proc_afs, &afs_proc_rootcell_fops))
+		goto error_tree;
 
 	_leave(" = 0");
 	return 0;
 
-error_rootcell:
- 	remove_proc_entry("cells", proc_afs);
-error_cells:
-	remove_proc_entry("fs/afs", NULL);
+error_tree:
+	remove_proc_subtree("fs/afs", NULL);
 error_dir:
 	_leave(" = -ENOMEM");
 	return -ENOMEM;
@@ -172,9 +149,7 @@ error_dir:
  */
 void afs_proc_cleanup(void)
 {
-	remove_proc_entry("rootcell", proc_afs);
-	remove_proc_entry("cells", proc_afs);
-	remove_proc_entry("fs/afs", NULL);
+	remove_proc_subtree("fs/afs", NULL);
 }
 
 /*
@@ -319,19 +294,6 @@ inval:
 	goto done;
 }
 
-/*
- * Stubs for /proc/fs/afs/rootcell
- */
-static int afs_proc_rootcell_open(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-static int afs_proc_rootcell_release(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
 static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
 				      size_t size, loff_t *_pos)
 {
@@ -387,38 +349,27 @@ nomem:
  */
 int afs_proc_cell_setup(struct afs_cell *cell)
 {
-	struct proc_dir_entry *p;
+	struct proc_dir_entry *dir;
 
 	_enter("%p{%s}", cell, cell->name);
 
-	cell->proc_dir = proc_mkdir(cell->name, proc_afs);
-	if (!cell->proc_dir)
+	dir = proc_mkdir(cell->name, proc_afs);
+	if (!dir)
 		goto error_dir;
 
-	p = proc_create_data("servers", 0, cell->proc_dir,
-			     &afs_proc_cell_servers_fops, cell);
-	if (!p)
-		goto error_servers;
-
-	p = proc_create_data("vlservers", 0, cell->proc_dir,
-			     &afs_proc_cell_vlservers_fops, cell);
-	if (!p)
-		goto error_vlservers;
-
-	p = proc_create_data("volumes", 0, cell->proc_dir,
-			     &afs_proc_cell_volumes_fops, cell);
-	if (!p)
-		goto error_volumes;
+	if (!proc_create_data("servers", 0, dir,
+			     &afs_proc_cell_servers_fops, cell) ||
+	    !proc_create_data("vlservers", 0, dir,
+			     &afs_proc_cell_vlservers_fops, cell) ||
+	    !proc_create_data("volumes", 0, dir,
+			     &afs_proc_cell_volumes_fops, cell))
+		goto error_tree;
 
 	_leave(" = 0");
 	return 0;
 
-error_volumes:
-	remove_proc_entry("vlservers", cell->proc_dir);
-error_vlservers:
-	remove_proc_entry("servers", cell->proc_dir);
-error_servers:
-	remove_proc_entry(cell->name, proc_afs);
+error_tree:
+	remove_proc_subtree(cell->name, proc_afs);
 error_dir:
 	_leave(" = -ENOMEM");
 	return -ENOMEM;
@@ -431,10 +382,7 @@ void afs_proc_cell_remove(struct afs_cell *cell)
 {
 	_enter("");
 
-	remove_proc_entry("volumes", cell->proc_dir);
-	remove_proc_entry("vlservers", cell->proc_dir);
-	remove_proc_entry("servers", cell->proc_dir);
-	remove_proc_entry(cell->name, proc_afs);
+	remove_proc_subtree(cell->name, proc_afs);
 
 	_leave("");
 }
@@ -462,14 +410,6 @@ static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-/*
- * close the file and release the ref to the cell
- */
-static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file)
-{
-	return seq_release(inode, file);
-}
-
 /*
  * set up the iterator to start reading from the cells list and return the
  * first item
@@ -568,15 +508,6 @@ static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-/*
- * close the file and release the ref to the cell
- */
-static int afs_proc_cell_vlservers_release(struct inode *inode,
-					   struct file *file)
-{
-	return seq_release(inode, file);
-}
-
 /*
  * set up the iterator to start reading from the cells list and return the
  * first item
@@ -672,15 +603,6 @@ static int afs_proc_cell_servers_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-/*
- * close the file and release the ref to the cell
- */
-static int afs_proc_cell_servers_release(struct inode *inode,
-					 struct file *file)
-{
-	return seq_release(inode, file);
-}
-
 /*
  * set up the iterator to start reading from the cells list and return the
  * first item