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97 lines
3.0 KiB
97 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
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/* |
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* Upcall description for nfsdcld communication |
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* |
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* Copyright (c) 2012 Red Hat, Inc. |
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* Author(s): Jeff Layton <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#ifndef _NFSD_CLD_H |
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#define _NFSD_CLD_H |
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#include <linux/types.h> |
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/* latest upcall version available */ |
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#define CLD_UPCALL_VERSION 2 |
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/* defined by RFC3530 */ |
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#define NFS4_OPAQUE_LIMIT 1024 |
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#ifndef SHA256_DIGEST_SIZE |
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#define SHA256_DIGEST_SIZE 32 |
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#endif |
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enum cld_command { |
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Cld_Create, /* create a record for this cm_id */ |
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Cld_Remove, /* remove record of this cm_id */ |
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Cld_Check, /* is this cm_id allowed? */ |
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Cld_GraceDone, /* grace period is complete */ |
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Cld_GraceStart, /* grace start (upload client records) */ |
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Cld_GetVersion, /* query max supported upcall version */ |
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}; |
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/* representation of long-form NFSv4 client ID */ |
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struct cld_name { |
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__u16 cn_len; /* length of cm_id */ |
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unsigned char cn_id[NFS4_OPAQUE_LIMIT]; /* client-provided */ |
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} __attribute__((packed)); |
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/* sha256 hash of the kerberos principal */ |
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struct cld_princhash { |
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__u8 cp_len; /* length of cp_data */ |
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unsigned char cp_data[SHA256_DIGEST_SIZE]; /* hash of principal */ |
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} __attribute__((packed)); |
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struct cld_clntinfo { |
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struct cld_name cc_name; |
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struct cld_princhash cc_princhash; |
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} __attribute__((packed)); |
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/* message struct for communication with userspace */ |
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struct cld_msg { |
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__u8 cm_vers; /* upcall version */ |
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__u8 cm_cmd; /* upcall command */ |
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__s16 cm_status; /* return code */ |
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__u32 cm_xid; /* transaction id */ |
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union { |
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__s64 cm_gracetime; /* grace period start time */ |
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struct cld_name cm_name; |
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__u8 cm_version; /* for getting max version */ |
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} __attribute__((packed)) cm_u; |
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} __attribute__((packed)); |
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/* version 2 message can include hash of kerberos principal */ |
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struct cld_msg_v2 { |
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__u8 cm_vers; /* upcall version */ |
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__u8 cm_cmd; /* upcall command */ |
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__s16 cm_status; /* return code */ |
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__u32 cm_xid; /* transaction id */ |
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union { |
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struct cld_name cm_name; |
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__u8 cm_version; /* for getting max version */ |
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struct cld_clntinfo cm_clntinfo; /* name & princ hash */ |
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} __attribute__((packed)) cm_u; |
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} __attribute__((packed)); |
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struct cld_msg_hdr { |
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__u8 cm_vers; /* upcall version */ |
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__u8 cm_cmd; /* upcall command */ |
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__s16 cm_status; /* return code */ |
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__u32 cm_xid; /* transaction id */ |
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} __attribute__((packed)); |
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#endif /* !_NFSD_CLD_H */
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