diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_group.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_group.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_group.h b/fs/xfs/libxfs/xfs_group.h new file mode 100644 index 000000000000..242b05627c7a --- /dev/null +++ b/fs/xfs/libxfs/xfs_group.h @@ -0,0 +1,164 @@ +/* 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 */ + + /* Precalculated geometry info */ + uint32_t xg_block_count; /* max usable gbno */ + uint32_t xg_min_gbno; /* min usable gbno */ + +#ifdef __KERNEL__ + /* -- kernel only structures below this line -- */ + + /* + * Track freed but not yet committed extents. + */ + struct xfs_extent_busy_tree *xg_busy_extents; + + /* + * 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; + + /* + * Hook to feed rmapbt updates to an active online repair. + */ + struct xfs_hooks xg_rmap_update_hooks; +#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_get_by_fsb(struct xfs_mount *mp, + xfs_fsblock_t fsbno, 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)) + +static inline xfs_agblock_t +xfs_group_max_blocks( + struct xfs_group *xg) +{ + return xg->xg_mount->m_groups[xg->xg_type].blocks; +} + +static inline xfs_fsblock_t +xfs_group_start_fsb( + struct xfs_group *xg) +{ + return ((xfs_fsblock_t)xg->xg_gno) << + xg->xg_mount->m_groups[xg->xg_type].blklog; +} + +static inline xfs_fsblock_t +xfs_gbno_to_fsb( + struct xfs_group *xg, + xfs_agblock_t gbno) +{ + return xfs_group_start_fsb(xg) | gbno; +} + +static inline xfs_daddr_t +xfs_gbno_to_daddr( + struct xfs_group *xg, + xfs_agblock_t gbno) +{ + struct xfs_mount *mp = xg->xg_mount; + uint32_t blocks = mp->m_groups[xg->xg_type].blocks; + + return XFS_FSB_TO_BB(mp, (xfs_fsblock_t)xg->xg_gno * blocks + gbno); +} + +static inline uint32_t +xfs_fsb_to_gno( + struct xfs_mount *mp, + xfs_fsblock_t fsbno, + enum xfs_group_type type) +{ + if (!mp->m_groups[type].blklog) + return 0; + return fsbno >> mp->m_groups[type].blklog; +} + +static inline xfs_agblock_t +xfs_fsb_to_gbno( + struct xfs_mount *mp, + xfs_fsblock_t fsbno, + enum xfs_group_type type) +{ + return fsbno & mp->m_groups[type].blkmask; +} + +static inline bool +xfs_verify_gbno( + struct xfs_group *xg, + uint32_t gbno) +{ + if (gbno >= xg->xg_block_count) + return false; + if (gbno < xg->xg_min_gbno) + return false; + return true; +} + +static inline bool +xfs_verify_gbext( + struct xfs_group *xg, + uint32_t gbno, + uint32_t glen) +{ + uint32_t end; + + if (!xfs_verify_gbno(xg, gbno)) + return false; + if (glen == 0 || check_add_overflow(gbno, glen - 1, &end)) + return false; + if (!xfs_verify_gbno(xg, end)) + return false; + return true; +} + +#endif /* __LIBXFS_GROUP_H */ |