diff options
author | Christoph Hellwig <hch@lst.de> | 2024-02-22 23:36:17 +0300 |
---|---|---|
committer | Darrick J. Wong <djwong@kernel.org> | 2024-02-22 23:36:17 +0300 |
commit | 4f0cd5a555072e21fb589975607b70798e073f8f (patch) | |
tree | 44c356ee6fcb0f8d0a3aeca0a5832f9c1169fb5c /fs/xfs/libxfs/xfs_btree.c | |
parent | 1a9d26291c68fbb8f8d24f9f694b32223a072745 (diff) | |
download | linux-4f0cd5a555072e21fb589975607b70798e073f8f.tar.xz |
xfs: split out a btree type from the btree ops geometry flags
Two of the btree cursor flags are always used together and encode
the fundamental btree type. There currently are two such types:
1) an on-disk AG-rooted btree with 32-bit pointers
2) an on-disk inode-rooted btree with 64-bit pointers
and we're about to add:
3) an in-memory btree with 64-bit pointers
Introduce a new enum and a new type field in struct xfs_btree_geom
to encode this type directly instead of using flags and change most
code to switch on this enum.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
[djwong: make the pointer lengths explicit]
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_btree.c')
-rw-r--r-- | fs/xfs/libxfs/xfs_btree.c | 66 |
1 files changed, 36 insertions, 30 deletions
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index 7907711322d4..e5d4b435a60a 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -447,10 +447,19 @@ xfs_btree_del_cursor( */ ASSERT(cur->bc_btnum != XFS_BTNUM_BMAP || cur->bc_ino.allocated == 0 || xfs_is_shutdown(cur->bc_mp) || error != 0); + + switch (cur->bc_ops->type) { + case XFS_BTREE_TYPE_AG: + if (cur->bc_ag.pag) + xfs_perag_put(cur->bc_ag.pag); + break; + case XFS_BTREE_TYPE_INODE: + /* nothing to do */ + break; + } + if (unlikely(cur->bc_flags & XFS_BTREE_STAGING)) kfree(cur->bc_ops); - if (!(cur->bc_ops->ptr_len == XFS_BTREE_LONG_PTR_LEN) && cur->bc_ag.pag) - xfs_perag_put(cur->bc_ag.pag); kmem_cache_free(cur->bc_cache, cur); } @@ -708,7 +717,7 @@ struct xfs_ifork * xfs_btree_ifork_ptr( struct xfs_btree_cur *cur) { - ASSERT(cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE); + ASSERT(cur->bc_ops->type == XFS_BTREE_TYPE_INODE); if (cur->bc_flags & XFS_BTREE_STAGING) return cur->bc_ino.ifake->if_fork; @@ -740,8 +749,8 @@ xfs_btree_get_block( int level, /* level in btree */ struct xfs_buf **bpp) /* buffer containing the block */ { - if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && - (level == cur->bc_nlevels - 1)) { + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE && + level == cur->bc_nlevels - 1) { *bpp = NULL; return xfs_btree_get_iroot(cur); } @@ -983,8 +992,8 @@ xfs_btree_readahead( * No readahead needed if we are at the root level and the * btree root is stored in the inode. */ - if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && - (lev == cur->bc_nlevels - 1)) + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE && + lev == cur->bc_nlevels - 1) return 0; if ((cur->bc_levels[lev].ra | lr) == cur->bc_levels[lev].ra) @@ -1172,14 +1181,12 @@ __xfs_btree_init_block( buf->bb_u.l.bb_lsn = 0; } } else { - /* owner is a 32 bit value on short blocks */ - __u32 __owner = (__u32)owner; - buf->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); buf->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); if (crc) { buf->bb_u.s.bb_blkno = cpu_to_be64(blkno); - buf->bb_u.s.bb_owner = cpu_to_be32(__owner); + /* owner is a 32 bit value on short blocks */ + buf->bb_u.s.bb_owner = cpu_to_be32((__u32)owner); uuid_copy(&buf->bb_u.s.bb_uuid, &mp->m_sb.sb_meta_uuid); buf->bb_u.s.bb_lsn = 0; } @@ -1217,7 +1224,7 @@ static inline __u64 xfs_btree_owner( struct xfs_btree_cur *cur) { - if (cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE) return cur->bc_ino.ip->i_ino; return cur->bc_ag.pag->pag_agno; } @@ -1638,7 +1645,7 @@ xfs_btree_increment( * confused or have the tree root in an inode. */ if (lev == cur->bc_nlevels) { - if (cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE) goto out0; ASSERT(0); xfs_btree_mark_sick(cur); @@ -1732,7 +1739,7 @@ xfs_btree_decrement( * or the root of the tree is in an inode. */ if (lev == cur->bc_nlevels) { - if (cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE) goto out0; ASSERT(0); xfs_btree_mark_sick(cur); @@ -1807,8 +1814,8 @@ xfs_btree_lookup_get_block( int error = 0; /* special case the root block if in an inode */ - if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && - (level == cur->bc_nlevels - 1)) { + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE && + level == cur->bc_nlevels - 1) { *blkp = xfs_btree_get_iroot(cur); return 0; } @@ -2343,7 +2350,7 @@ xfs_btree_lshift( int error; /* error return value */ int i; - if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && + if ((cur->bc_ops->type == XFS_BTREE_TYPE_INODE) && level == cur->bc_nlevels - 1) goto out0; @@ -2539,8 +2546,8 @@ xfs_btree_rshift( int error; /* error return value */ int i; /* loop counter */ - if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && - (level == cur->bc_nlevels - 1)) + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE && + level == cur->bc_nlevels - 1) goto out0; /* Set up variables for this block as "left". */ @@ -2990,7 +2997,6 @@ xfs_btree_split( #define xfs_btree_split __xfs_btree_split #endif /* __KERNEL__ */ - /* * Copy the old inode root contents into a real block and make the * broot point to it. @@ -3015,7 +3021,7 @@ xfs_btree_new_iroot( XFS_BTREE_STATS_INC(cur, newroot); - ASSERT(cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE); + ASSERT(cur->bc_ops->type == XFS_BTREE_TYPE_INODE); level = cur->bc_nlevels - 1; @@ -3240,7 +3246,7 @@ xfs_btree_make_block_unfull( { int error = 0; - if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE && level == cur->bc_nlevels - 1) { struct xfs_inode *ip = cur->bc_ino.ip; @@ -3326,8 +3332,8 @@ xfs_btree_insrec( * If we have an external root pointer, and we've made it to the * root level, allocate a new root block and we're done. */ - if (!(cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) && - (level >= cur->bc_nlevels)) { + if (cur->bc_ops->type != XFS_BTREE_TYPE_INODE && + level >= cur->bc_nlevels) { error = xfs_btree_new_root(cur, stat); xfs_btree_set_ptr_null(cur, ptrp); @@ -3614,7 +3620,7 @@ xfs_btree_kill_iroot( #endif int i; - ASSERT(cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE); + ASSERT(cur->bc_ops->type == XFS_BTREE_TYPE_INODE); ASSERT(cur->bc_nlevels > 1); /* @@ -3851,7 +3857,7 @@ xfs_btree_delrec( * nothing left to do. */ if (level == cur->bc_nlevels - 1) { - if (cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) { + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE) { xfs_iroot_realloc(cur->bc_ino.ip, -1, cur->bc_ino.whichfork); @@ -3919,7 +3925,7 @@ xfs_btree_delrec( xfs_btree_get_sibling(cur, block, &rptr, XFS_BB_RIGHTSIB); xfs_btree_get_sibling(cur, block, &lptr, XFS_BB_LEFTSIB); - if (cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) { + if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE) { /* * One child of root, need to get a chance to copy its contents * into the root and delete it. Can't go up to next level, @@ -4236,8 +4242,8 @@ xfs_btree_delrec( * If we joined with the right neighbor and there's a level above * us, increment the cursor at that level. */ - else if ((cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE) || - (level + 1 < cur->bc_nlevels)) { + else if (cur->bc_ops->type == XFS_BTREE_TYPE_INODE || + level + 1 < cur->bc_nlevels) { error = xfs_btree_increment(cur, level + 1, &i); if (error) goto error0; @@ -4528,7 +4534,7 @@ xfs_btree_block_change_owner( * though, so everything is consistent in memory. */ if (!bp) { - ASSERT(cur->bc_ops->geom_flags & XFS_BTGEO_ROOT_IN_INODE); + ASSERT(cur->bc_ops->type == XFS_BTREE_TYPE_INODE); ASSERT(level == cur->bc_nlevels - 1); return 0; } |