git simplify nilfs check for busy subtree
Reviewed-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index af3ba04..7ac2a12 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -994,23 +994,16 @@
return ret;
}
-static int nilfs_tree_was_touched(struct dentry *root_dentry)
-{
- return d_count(root_dentry) > 1;
-}
-
/**
- * nilfs_try_to_shrink_tree() - try to shrink dentries of a checkpoint
+ * nilfs_tree_is_busy() - try to shrink dentries of a checkpoint
* @root_dentry: root dentry of the tree to be shrunk
*
* This function returns true if the tree was in-use.
*/
-static int nilfs_try_to_shrink_tree(struct dentry *root_dentry)
+static bool nilfs_tree_is_busy(struct dentry *root_dentry)
{
- if (have_submounts(root_dentry))
- return true;
shrink_dcache_parent(root_dentry);
- return nilfs_tree_was_touched(root_dentry);
+ return d_count(root_dentry) > 1;
}
int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno)
@@ -1034,8 +1027,7 @@
if (inode) {
dentry = d_find_alias(inode);
if (dentry) {
- if (nilfs_tree_was_touched(dentry))
- ret = nilfs_try_to_shrink_tree(dentry);
+ ret = nilfs_tree_is_busy(dentry);
dput(dentry);
}
iput(inode);
@@ -1331,11 +1323,8 @@
s->s_flags |= MS_ACTIVE;
} else if (!sd.cno) {
- int busy = false;
-
- if (nilfs_tree_was_touched(s->s_root)) {
- busy = nilfs_try_to_shrink_tree(s->s_root);
- if (busy && (flags ^ s->s_flags) & MS_RDONLY) {
+ if (nilfs_tree_is_busy(s->s_root)) {
+ if ((flags ^ s->s_flags) & MS_RDONLY) {
printk(KERN_ERR "NILFS: the device already "
"has a %s mount.\n",
(s->s_flags & MS_RDONLY) ?
@@ -1343,8 +1332,7 @@
err = -EBUSY;
goto failed_super;
}
- }
- if (!busy) {
+ } else {
/*
* Try remount to setup mount states if the current
* tree is not mounted and only snapshots use this sb.