/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
 */

#ifndef __SHARE_CONFIG_MANAGEMENT_H__
#define __SHARE_CONFIG_MANAGEMENT_H__

#include <linux/workqueue.h>
#include <linux/hashtable.h>
#include <linux/path.h>
#include <linux/unicode.h>

struct ksmbd_work;

struct ksmbd_share_config {
        char                    *name;
        char                    *path;

        unsigned int            path_sz;
        unsigned int            flags;
        struct list_head        veto_list;

        struct path             vfs_path;

        atomic_t                refcount;
        struct hlist_node       hlist;
        unsigned short          create_mask;
        unsigned short          directory_mask;
        unsigned short          force_create_mode;
        unsigned short          force_directory_mode;
        unsigned short          force_uid;
        unsigned short          force_gid;
};

#define KSMBD_SHARE_INVALID_UID ((__u16)-1)
#define KSMBD_SHARE_INVALID_GID ((__u16)-1)

static inline umode_t
share_config_create_mode(struct ksmbd_share_config *share,
                         umode_t posix_mode)
{
        umode_t mode = (posix_mode ?: (umode_t)-1) & share->create_mask;

        return mode | share->force_create_mode;
}

static inline umode_t
share_config_directory_mode(struct ksmbd_share_config *share,
                            umode_t posix_mode)
{
        umode_t mode = (posix_mode ?: (umode_t)-1) & share->directory_mask;

        return mode | share->force_directory_mode;
}

static inline int test_share_config_flag(struct ksmbd_share_config *share,
                                         int flag)
{
        return share->flags & flag;
}

void ksmbd_share_config_del(struct ksmbd_share_config *share);
void __ksmbd_share_config_put(struct ksmbd_share_config *share);

static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
{
        if (!atomic_dec_and_test(&share->refcount))
                return;
        __ksmbd_share_config_put(share);
}

struct ksmbd_share_config *ksmbd_share_config_get(struct ksmbd_work *work,
                                                  const char *name);
bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
                               const char *filename);
#endif /* __SHARE_CONFIG_MANAGEMENT_H__ */