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e9c4d8bfb2
Split the lookup and refcount handling of struct xfs_perag into an embedded xfs_group structure that can be reused for the upcoming realtime groups. It will be extended with more features later. Note that he xg_type field will only need a single bit even with realtime group support. For now it fills a hole, but it might be worth to fold it into another field if we can use this space better. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2018 Red Hat, Inc.
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*/
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#ifndef __LIBXFS_GROUP_H
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#define __LIBXFS_GROUP_H 1
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struct xfs_group {
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struct xfs_mount *xg_mount;
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uint32_t xg_gno;
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enum xfs_group_type xg_type;
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atomic_t xg_ref; /* passive reference count */
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atomic_t xg_active_ref; /* active reference count */
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};
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struct xfs_group *xfs_group_get(struct xfs_mount *mp, uint32_t index,
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enum xfs_group_type type);
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struct xfs_group *xfs_group_hold(struct xfs_group *xg);
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void xfs_group_put(struct xfs_group *xg);
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struct xfs_group *xfs_group_grab(struct xfs_mount *mp, uint32_t index,
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enum xfs_group_type type);
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struct xfs_group *xfs_group_grab_next_mark(struct xfs_mount *mp,
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struct xfs_group *xg, xa_mark_t mark, enum xfs_group_type type);
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void xfs_group_rele(struct xfs_group *xg);
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void xfs_group_free(struct xfs_mount *mp, uint32_t index,
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enum xfs_group_type type, void (*uninit)(struct xfs_group *xg));
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int xfs_group_insert(struct xfs_mount *mp, struct xfs_group *xg,
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uint32_t index, enum xfs_group_type);
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#define xfs_group_set_mark(_xg, _mark) \
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xa_set_mark(&(_xg)->xg_mount->m_groups[(_xg)->xg_type].xa, \
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(_xg)->xg_gno, (_mark))
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#define xfs_group_clear_mark(_xg, _mark) \
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xa_clear_mark(&(_xg)->xg_mount->m_groups[(_xg)->xg_type].xa, \
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(_xg)->xg_gno, (_mark))
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#define xfs_group_marked(_mp, _type, _mark) \
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xa_marked(&(_mp)->m_groups[(_type)].xa, (_mark))
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#endif /* __LIBXFS_GROUP_H */
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