From: Darrick J. Wong <djwong@xxxxxxxxxx> Define helper functions to lock all metadata inodes related to a realtime group. There's not much to look at now, but this will become important when we add per-rtgroup metadata files and online fsck code for them. Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> --- fs/xfs/libxfs/xfs_rtgroup.c | 49 +++++++++++++++++++++++++++++++++++++++++++ fs/xfs/libxfs/xfs_rtgroup.h | 16 ++++++++++++++ 2 files changed, 65 insertions(+) diff --git a/fs/xfs/libxfs/xfs_rtgroup.c b/fs/xfs/libxfs/xfs_rtgroup.c index 2bad1ecb811eb..51f04cad5227c 100644 --- a/fs/xfs/libxfs/xfs_rtgroup.c +++ b/fs/xfs/libxfs/xfs_rtgroup.c @@ -194,3 +194,52 @@ xfs_rtgroup_extents( ASSERT(xfs_has_rtgroups(mp)); return mp->m_sb.sb_rgextents; } + +/* Lock metadata inodes associated with this rt group. */ +void +xfs_rtgroup_lock( + struct xfs_rtgroup *rtg, + unsigned int rtglock_flags) +{ + ASSERT(!(rtglock_flags & ~XFS_RTGLOCK_ALL_FLAGS)); + ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) || + !(rtglock_flags & XFS_RTGLOCK_BITMAP)); + + if (rtglock_flags & XFS_RTGLOCK_BITMAP) + xfs_rtbitmap_lock(rtg->rtg_mount); + else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) + xfs_rtbitmap_lock_shared(rtg->rtg_mount, XFS_RBMLOCK_BITMAP); +} + +/* Unlock metadata inodes associated with this rt group. */ +void +xfs_rtgroup_unlock( + struct xfs_rtgroup *rtg, + unsigned int rtglock_flags) +{ + ASSERT(!(rtglock_flags & ~XFS_RTGLOCK_ALL_FLAGS)); + ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) || + !(rtglock_flags & XFS_RTGLOCK_BITMAP)); + + if (rtglock_flags & XFS_RTGLOCK_BITMAP) + xfs_rtbitmap_unlock(rtg->rtg_mount); + else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) + xfs_rtbitmap_unlock_shared(rtg->rtg_mount, XFS_RBMLOCK_BITMAP); +} + +/* + * Join realtime group metadata inodes to the transaction. The ILOCKs will be + * released on transaction commit. + */ +void +xfs_rtgroup_trans_join( + struct xfs_trans *tp, + struct xfs_rtgroup *rtg, + unsigned int rtglock_flags) +{ + ASSERT(!(rtglock_flags & ~XFS_RTGLOCK_ALL_FLAGS)); + ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED)); + + if (rtglock_flags & XFS_RTGLOCK_BITMAP) + xfs_rtbitmap_trans_join(tp); +} diff --git a/fs/xfs/libxfs/xfs_rtgroup.h b/fs/xfs/libxfs/xfs_rtgroup.h index 2c09ecfc50328..d2eb2cd5775dd 100644 --- a/fs/xfs/libxfs/xfs_rtgroup.h +++ b/fs/xfs/libxfs/xfs_rtgroup.h @@ -205,8 +205,24 @@ xfs_daddr_to_rtb( #ifdef CONFIG_XFS_RT xfs_rtxnum_t xfs_rtgroup_extents(struct xfs_mount *mp, xfs_rgnumber_t rgno); + +/* Lock the rt bitmap inode in exclusive mode */ +#define XFS_RTGLOCK_BITMAP (1U << 0) +/* Lock the rt bitmap inode in shared mode */ +#define XFS_RTGLOCK_BITMAP_SHARED (1U << 1) + +#define XFS_RTGLOCK_ALL_FLAGS (XFS_RTGLOCK_BITMAP | \ + XFS_RTGLOCK_BITMAP_SHARED) + +void xfs_rtgroup_lock(struct xfs_rtgroup *rtg, unsigned int rtglock_flags); +void xfs_rtgroup_unlock(struct xfs_rtgroup *rtg, unsigned int rtglock_flags); +void xfs_rtgroup_trans_join(struct xfs_trans *tp, struct xfs_rtgroup *rtg, + unsigned int rtglock_flags); #else # define xfs_rtgroup_extents(mp, rgno) (0) +# define xfs_rtgroup_lock(rtg, gf) ((void)0) +# define xfs_rtgroup_unlock(rtg, gf) ((void)0) +# define xfs_rtgroup_trans_join(tp, rtg, gf) ((void)0) #endif /* CONFIG_XFS_RT */ #endif /* __LIBXFS_RTGROUP_H */