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cifs: return -ENODATA when deleting an xattr that does not exist

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BUGZILLA: https://bugzilla.kernel.org/show_bug.cgi?id=202007

When deleting an xattr/EA:
SMB2/3 servers will return SUCCESS when clients delete non-existing EAs.
This means that we need to first QUERY the server and check if the EA
exists or not so that we can return -ENODATA correctly when this happens.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2019-02-07 15:48:44 +10:00 committed by Steve French
parent eca0045238
commit 2109464184
1 changed files with 10 additions and 0 deletions
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10
fs/cifs/smb2ops.c
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@ -940,6 +940,16 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
if (ses->server->ops->query_all_EAs) {
if (!ea_value) {
rc = ses->server->ops->query_all_EAs(xid, tcon, path,
ea_name, NULL, 0,
cifs_sb);
if (rc == -ENODATA)
goto sea_exit;
}
}
/* Open */
memset(&open_iov, 0, sizeof(open_iov));
rqst[0].rq_iov = open_iov;