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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018 Red Hat, Inc.
*/
#ifndef __LIBXFS_GROUP_H
#define __LIBXFS_GROUP_H 1
struct xfs_group {
struct xfs_mount *xg_mount;
uint32_t xg_gno;
enum xfs_group_type xg_type;
atomic_t xg_ref; /* passive reference count */
atomic_t xg_active_ref; /* active reference count */
#ifdef __KERNEL__
/* -- kernel only structures below this line -- */
/*
* Bitsets of per-ag metadata that have been checked and/or are sick.
* Callers should hold xg_state_lock before accessing this field.
*/
uint16_t xg_checked;
uint16_t xg_sick;
spinlock_t xg_state_lock;
/*
* We use xfs_drain to track the number of deferred log intent items
* that have been queued (but not yet processed) so that waiters (e.g.
* scrub) will not lock resources when other threads are in the middle
* of processing a chain of intent items only to find momentary
* inconsistencies.
*/
struct xfs_defer_drain xg_intents_drain;
#endif /* __KERNEL__ */
};
struct xfs_group *xfs_group_get(struct xfs_mount *mp, uint32_t index,
enum xfs_group_type type);
struct xfs_group *xfs_group_hold(struct xfs_group *xg);
void xfs_group_put(struct xfs_group *xg);
struct xfs_group *xfs_group_grab(struct xfs_mount *mp, uint32_t index,
enum xfs_group_type type);
struct xfs_group *xfs_group_next_range(struct xfs_mount *mp,
struct xfs_group *xg, uint32_t start_index, uint32_t end_index,
enum xfs_group_type type);
struct xfs_group *xfs_group_grab_next_mark(struct xfs_mount *mp,
struct xfs_group *xg, xa_mark_t mark, enum xfs_group_type type);
void xfs_group_rele(struct xfs_group *xg);
void xfs_group_free(struct xfs_mount *mp, uint32_t index,
enum xfs_group_type type, void (*uninit)(struct xfs_group *xg));
int xfs_group_insert(struct xfs_mount *mp, struct xfs_group *xg,
uint32_t index, enum xfs_group_type);
#define xfs_group_set_mark(_xg, _mark) \
xa_set_mark(&(_xg)->xg_mount->m_groups[(_xg)->xg_type].xa, \
(_xg)->xg_gno, (_mark))
#define xfs_group_clear_mark(_xg, _mark) \
xa_clear_mark(&(_xg)->xg_mount->m_groups[(_xg)->xg_type].xa, \
(_xg)->xg_gno, (_mark))
#define xfs_group_marked(_mp, _type, _mark) \
xa_marked(&(_mp)->m_groups[(_type)].xa, (_mark))
#endif /* __LIBXFS_GROUP_H */
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