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pstore: Fail to unlink if a driver has not defined pstore_erase

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commit bf2883339a upstream.

pstore_erase is used to erase the record from the persistent store.
So if a driver has not defined pstore_erase callback return
-EPERM instead of unlinking a file as deleting the file without
erasing its record in persistent store will give a wrong impression
to customers.

Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: HuKeping <hukeping@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aruna Balakrishnaiah 2013-06-25 14:33:56 +05:30 committed by Greg Kroah-Hartman
parent b12835bdb9
commit 841eb01f53
1 changed files with 2 additions and 0 deletions
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2
fs/pstore/inode.c
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@ -178,6 +178,8 @@ static int pstore_unlink(struct inode *dir, struct dentry *dentry)
if (p->psi->erase)
p->psi->erase(p->type, p->id, p->count,
dentry->d_inode->i_ctime, p->psi);
else
return -EPERM;
return simple_unlink(dir, dentry);
}