diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_inode_fork.h')
-rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.h | 76 |
1 files changed, 62 insertions, 14 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h index 3d64a3acb0ed..4f68c1f20beb 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.h +++ b/fs/xfs/libxfs/xfs_inode_fork.h @@ -21,9 +21,9 @@ struct xfs_ifork { void *if_root; /* extent tree root */ char *if_data; /* inline file data */ } if_u1; + xfs_extnum_t if_nextents; /* # of extents in this fork */ short if_broot_bytes; /* bytes allocated for root */ int8_t if_format; /* format of this fork */ - xfs_extnum_t if_nextents; /* # of extents in this fork */ }; /* @@ -40,19 +40,6 @@ struct xfs_ifork { #define XFS_IEXT_PUNCH_HOLE_CNT (1) /* - * Directory entry addition can cause the following, - * 1. Data block can be added/removed. - * A new extent can cause extent count to increase by 1. - * 2. Free disk block can be added/removed. - * Same behaviour as described above for Data block. - * 3. Dabtree blocks. - * XFS_DA_NODE_MAXDEPTH blocks can be added. Each of these can be new - * extents. Hence extent count can increase by XFS_DA_NODE_MAXDEPTH. - */ -#define XFS_IEXT_DIR_MANIP_CNT(mp) \ - ((XFS_DA_NODE_MAXDEPTH + 1 + 1) * (mp)->m_dir_geo->fsbcount) - -/* * Adding/removing an xattr can cause XFS_DA_NODE_MAXDEPTH extents to * be added. One extra extent for dabtree in case a local attr is * large enough to cause a double split. It can also cause extent @@ -133,6 +120,65 @@ static inline int8_t xfs_ifork_format(struct xfs_ifork *ifp) return ifp->if_format; } +static inline xfs_extnum_t xfs_iext_max_nextents(bool has_large_extent_counts, + int whichfork) +{ + switch (whichfork) { + case XFS_DATA_FORK: + case XFS_COW_FORK: + if (has_large_extent_counts) + return XFS_MAX_EXTCNT_DATA_FORK_LARGE; + return XFS_MAX_EXTCNT_DATA_FORK_SMALL; + + case XFS_ATTR_FORK: + if (has_large_extent_counts) + return XFS_MAX_EXTCNT_ATTR_FORK_LARGE; + return XFS_MAX_EXTCNT_ATTR_FORK_SMALL; + + default: + ASSERT(0); + return 0; + } +} + +static inline xfs_extnum_t +xfs_dfork_data_extents( + struct xfs_dinode *dip) +{ + if (xfs_dinode_has_large_extent_counts(dip)) + return be64_to_cpu(dip->di_big_nextents); + + return be32_to_cpu(dip->di_nextents); +} + +static inline xfs_extnum_t +xfs_dfork_attr_extents( + struct xfs_dinode *dip) +{ + if (xfs_dinode_has_large_extent_counts(dip)) + return be32_to_cpu(dip->di_big_anextents); + + return be16_to_cpu(dip->di_anextents); +} + +static inline xfs_extnum_t +xfs_dfork_nextents( + struct xfs_dinode *dip, + int whichfork) +{ + switch (whichfork) { + case XFS_DATA_FORK: + return xfs_dfork_data_extents(dip); + case XFS_ATTR_FORK: + return xfs_dfork_attr_extents(dip); + default: + ASSERT(0); + break; + } + + return 0; +} + struct xfs_ifork *xfs_ifork_alloc(enum xfs_dinode_fmt format, xfs_extnum_t nextents); struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); @@ -229,6 +275,8 @@ int xfs_ifork_verify_local_data(struct xfs_inode *ip); int xfs_ifork_verify_local_attr(struct xfs_inode *ip); int xfs_iext_count_may_overflow(struct xfs_inode *ip, int whichfork, int nr_to_add); +int xfs_iext_count_upgrade(struct xfs_trans *tp, struct xfs_inode *ip, + uint nr_to_add); /* returns true if the fork has extents but they are not read in yet. */ static inline bool xfs_need_iread_extents(struct xfs_ifork *ifp) |