/usr/src/aufs-4.9+20161219/fs/aufs/spl.h is in aufs-dkms 4.9+20161219-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | /*
* Copyright (C) 2005-2016 Junjiro R. Okajima
*
* This program, aufs is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* simple list protected by a spinlock
*/
#ifndef __AUFS_SPL_H__
#define __AUFS_SPL_H__
#ifdef __KERNEL__
#if 0
struct au_splhead {
spinlock_t spin;
struct list_head head;
};
static inline void au_spl_init(struct au_splhead *spl)
{
spin_lock_init(&spl->spin);
INIT_LIST_HEAD(&spl->head);
}
static inline void au_spl_add(struct list_head *list, struct au_splhead *spl)
{
spin_lock(&spl->spin);
list_add(list, &spl->head);
spin_unlock(&spl->spin);
}
static inline void au_spl_del(struct list_head *list, struct au_splhead *spl)
{
spin_lock(&spl->spin);
list_del(list);
spin_unlock(&spl->spin);
}
static inline void au_spl_del_rcu(struct list_head *list,
struct au_splhead *spl)
{
spin_lock(&spl->spin);
list_del_rcu(list);
spin_unlock(&spl->spin);
}
#endif
/* ---------------------------------------------------------------------- */
struct au_sphlhead {
spinlock_t spin;
struct hlist_head head;
};
static inline void au_sphl_init(struct au_sphlhead *sphl)
{
spin_lock_init(&sphl->spin);
INIT_HLIST_HEAD(&sphl->head);
}
static inline void au_sphl_add(struct hlist_node *hlist,
struct au_sphlhead *sphl)
{
spin_lock(&sphl->spin);
hlist_add_head(hlist, &sphl->head);
spin_unlock(&sphl->spin);
}
static inline void au_sphl_del(struct hlist_node *hlist,
struct au_sphlhead *sphl)
{
spin_lock(&sphl->spin);
hlist_del(hlist);
spin_unlock(&sphl->spin);
}
static inline void au_sphl_del_rcu(struct hlist_node *hlist,
struct au_sphlhead *sphl)
{
spin_lock(&sphl->spin);
hlist_del_rcu(hlist);
spin_unlock(&sphl->spin);
}
static inline unsigned long au_sphl_count(struct au_sphlhead *sphl)
{
unsigned long cnt;
struct hlist_node *pos;
cnt = 0;
spin_lock(&sphl->spin);
hlist_for_each(pos, &sphl->head)
cnt++;
spin_unlock(&sphl->spin);
return cnt;
}
#endif /* __KERNEL__ */
#endif /* __AUFS_SPL_H__ */
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