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switch ->get_link() to delayed_call, kill ->put_link()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2015-12-29 15:58:39 -05:00
parent cd3417c8fc
commit fceef393a5
43 changed files with 206 additions and 218 deletions
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45
fs/overlayfs/inode.c
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@@ -131,19 +131,12 @@ out_dput:
return err;
}
struct ovl_link_data {
struct dentry *realdentry;
void *cookie;
};
static const char *ovl_get_link(struct dentry *dentry,
struct inode *inode, void **cookie)
struct inode *inode,
struct delayed_call *done)
{
struct dentry *realdentry;
struct inode *realinode;
struct ovl_link_data *data = NULL;
const char *ret;
if (!dentry)
return ERR_PTR(-ECHILD);
@@ -154,38 +147,7 @@ static const char *ovl_get_link(struct dentry *dentry,
if (WARN_ON(!realinode->i_op->get_link))
return ERR_PTR(-EPERM);
if (realinode->i_op->put_link) {
data = kmalloc(sizeof(struct ovl_link_data), GFP_KERNEL);
if (!data)
return ERR_PTR(-ENOMEM);
data->realdentry = realdentry;
}
ret = realinode->i_op->get_link(realdentry, realinode, cookie);
if (IS_ERR_OR_NULL(ret)) {
kfree(data);
return ret;
}
if (data)
data->cookie = *cookie;
*cookie = data;
return ret;
}
static void ovl_put_link(struct inode *unused, void *c)
{
struct inode *realinode;
struct ovl_link_data *data = c;
if (!data)
return;
realinode = data->realdentry->d_inode;
realinode->i_op->put_link(realinode, data->cookie);
kfree(data);
return realinode->i_op->get_link(realdentry, realinode, done);
}
static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
@@ -383,7 +345,6 @@ static const struct inode_operations ovl_file_inode_operations = {
static const struct inode_operations ovl_symlink_inode_operations = {
.setattr = ovl_setattr,
.get_link = ovl_get_link,
.put_link = ovl_put_link,
.readlink = ovl_readlink,
.getattr = ovl_getattr,
.setxattr = ovl_setxattr,