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/* SPDX-License-Identifier: GPL-2.0 */
/*
* DOS share management for lockd.
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#ifndef _LOCKD_SHARE_H
#define _LOCKD_SHARE_H
#include <linux/bits.h>
/* Synthetic svid for lockowner lookup during share operations */
#define LOCKD_SHARE_SVID (~(u32)0)
/* One bit per (access, deny) pair; index = (access << 2) | deny */
#define LOCKD_FSH_BIT(a, d) BIT(((a) << 2) | (d))
/*
* DOS share for a specific file
*/
struct lockd_share {
struct lockd_share * s_next; /* linked list */
struct nlm_host * s_host; /* client host */
struct nlm_file * s_file; /* shared file */
struct xdr_netobj s_owner; /* owner handle */
u32 s_access; /* access mode */
u32 s_mode; /* deny mode */
u16 s_access_deny_bmap; /* held (access, deny) pairs */
};
__be32 nlmsvc_share_file(struct nlm_host *host, struct nlm_file *file,
struct xdr_netobj *oh, u32 access, u32 mode);
__be32 nlmsvc_unshare_file(struct nlm_host *host, struct nlm_file *file,
struct xdr_netobj *oh, u32 access, u32 mode);
void nlmsvc_traverse_shares(struct nlm_host *, struct nlm_file *,
nlm_host_match_fn_t);
#endif /* _LOCKD_SHARE_H */
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