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ovl: prepare to copy up without workdir

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With index=on, we copy up lower hardlinks to work dir and move them into
index dir. Fix locking to allow work dir and index dir to be the same
directory.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Amir Goldstein 2020-04-03 08:43:12 +03:00 committed by Miklos Szeredi
parent 3011645b5b
commit 773cb4c56b
1 changed files with 4 additions and 3 deletions
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7
fs/overlayfs/copy_up.c
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@ -584,9 +584,10 @@ static int ovl_copy_up_workdir(struct ovl_copy_up_ctx *c)
.link = c->link
};
err = ovl_lock_rename_workdir(c->workdir, c->destdir);
if (err)
return err;
/* workdir and destdir could be the same when copying up to indexdir */
err = -EIO;
if (lock_rename(c->workdir, c->destdir) != NULL)
goto unlock;
err = ovl_prep_cu_creds(c->dentry, &cc);
if (err)