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ovl: Use out_err instead of out_nomem 

Right now we use goto out_nomem which assumes error code is -ENOMEM.  But
there are other errors returned like -ESTALE as well.  So instead of
out_nomem, use out_err which will do ERR_PTR(err).  That way one can put
error code in err and jump to out_err.

This just code reorganization and no change of functionality.

I am about to add more code and this organization helps laying more code
and error paths on top of it.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Vivek Goyal 2018-05-11 11:49:28 -04:00 committed by Miklos Szeredi
parent 0c28887493
commit 027065b726
1 changed files with 10 additions and 7 deletions
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17
fs/overlayfs/inode.c
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@ -782,6 +782,7 @@ struct inode *ovl_get_inode(struct super_block *sb,
int fsid = bylower ? oip->lowerpath->layer->fsid : 0;
bool is_dir;
unsigned long ino = 0;
int err = -ENOMEM;
if (!realinode)
realinode = d_inode(lowerdentry);
@ -798,7 +799,7 @@ struct inode *ovl_get_inode(struct super_block *sb,
inode = ovl_iget5(sb, oip->newinode, key);
if (!inode)
goto out_nomem;
goto out_err;
if (!(inode->i_state & I_NEW)) {
/*
* Verify that the underlying files stored in the inode
@ -807,8 +808,8 @@ struct inode *ovl_get_inode(struct super_block *sb,
if (!ovl_verify_inode(inode, lowerdentry, upperdentry,
true)) {
iput(inode);
inode = ERR_PTR(-ESTALE);
goto out;
err = -ESTALE;
goto out_err;
}
dput(upperdentry);
@ -824,8 +825,10 @@ struct inode *ovl_get_inode(struct super_block *sb,
} else {
/* Lower hardlink that will be broken on copy up */
inode = new_inode(sb);
if (!inode)
goto out_nomem;
if (!inode) {
err = -ENOMEM;
goto out_err;
}
}
ovl_fill_inode(inode, realinode->i_mode, realinode->i_rdev, ino, fsid);
ovl_inode_init(inode, upperdentry, lowerdentry);
@ -851,7 +854,7 @@ struct inode *ovl_get_inode(struct super_block *sb,
out:
return inode;
out_nomem:
inode = ERR_PTR(-ENOMEM);
out_err:
inode = ERR_PTR(err);
goto out;
}