ovl: abstract ovl_inode lock with a helper
The abstraction improves code readabilty (to some).
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index d3a7860..7c01327 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -521,13 +521,13 @@ bool ovl_already_copied_up(struct dentry *dentry, int flags)
int ovl_copy_up_start(struct dentry *dentry, int flags)
{
- struct ovl_inode *oi = OVL_I(d_inode(dentry));
+ struct inode *inode = d_inode(dentry);
int err;
- err = mutex_lock_interruptible(&oi->lock);
+ err = ovl_inode_lock(inode);
if (!err && ovl_already_copied_up_locked(dentry, flags)) {
err = 1; /* Already copied up */
- mutex_unlock(&oi->lock);
+ ovl_inode_unlock(inode);
}
return err;
@@ -535,7 +535,7 @@ int ovl_copy_up_start(struct dentry *dentry, int flags)
void ovl_copy_up_end(struct dentry *dentry)
{
- mutex_unlock(&OVL_I(d_inode(dentry))->lock);
+ ovl_inode_unlock(d_inode(dentry));
}
bool ovl_check_origin_xattr(struct dentry *dentry)
@@ -740,11 +740,11 @@ static void ovl_cleanup_index(struct dentry *dentry)
*/
int ovl_nlink_start(struct dentry *dentry)
{
- struct ovl_inode *oi = OVL_I(d_inode(dentry));
+ struct inode *inode = d_inode(dentry);
const struct cred *old_cred;
int err;
- if (WARN_ON(!d_inode(dentry)))
+ if (WARN_ON(!inode))
return -ENOENT;
/*
@@ -767,11 +767,11 @@ int ovl_nlink_start(struct dentry *dentry)
return err;
}
- err = mutex_lock_interruptible(&oi->lock);
+ err = ovl_inode_lock(inode);
if (err)
return err;
- if (d_is_dir(dentry) || !ovl_test_flag(OVL_INDEX, d_inode(dentry)))
+ if (d_is_dir(dentry) || !ovl_test_flag(OVL_INDEX, inode))
goto out;
old_cred = ovl_override_creds(dentry->d_sb);
@@ -786,15 +786,16 @@ int ovl_nlink_start(struct dentry *dentry)
out:
if (err)
- mutex_unlock(&oi->lock);
+ ovl_inode_unlock(inode);
return err;
}
void ovl_nlink_end(struct dentry *dentry)
{
- if (ovl_test_flag(OVL_INDEX, d_inode(dentry)) &&
- d_inode(dentry)->i_nlink == 0) {
+ struct inode *inode = d_inode(dentry);
+
+ if (ovl_test_flag(OVL_INDEX, inode) && inode->i_nlink == 0) {
const struct cred *old_cred;
old_cred = ovl_override_creds(dentry->d_sb);
@@ -802,7 +803,7 @@ void ovl_nlink_end(struct dentry *dentry)
revert_creds(old_cred);
}
- mutex_unlock(&OVL_I(d_inode(dentry))->lock);
+ ovl_inode_unlock(inode);
}
int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir)