diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_da_btree.c')
-rw-r--r-- | fs/xfs/libxfs/xfs_da_btree.c | 69 |
1 files changed, 31 insertions, 38 deletions
diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c index e576560b46e9..5457188bb4de 100644 --- a/fs/xfs/libxfs/xfs_da_btree.c +++ b/fs/xfs/libxfs/xfs_da_btree.c @@ -421,6 +421,25 @@ xfs_da3_node_read_mapped( return xfs_da3_node_set_type(tp, *bpp); } +/* + * Copy src directory/attr leaf/node buffer to the dst. + * For v5 file systems make sure the right blkno is stamped in. + */ +void +xfs_da_buf_copy( + struct xfs_buf *dst, + struct xfs_buf *src, + size_t size) +{ + struct xfs_da3_blkinfo *da3 = dst->b_addr; + + memcpy(dst->b_addr, src->b_addr, size); + dst->b_ops = src->b_ops; + xfs_trans_buf_copy_type(dst, src); + if (xfs_has_crc(dst->b_mount)) + da3->blkno = cpu_to_be64(xfs_buf_daddr(dst)); +} + /*======================================================================== * Routines used for growing the Btree. *========================================================================*/ @@ -690,12 +709,6 @@ xfs_da3_root_split( btree = icnodehdr.btree; size = (int)((char *)&btree[icnodehdr.count] - (char *)oldroot); level = icnodehdr.level; - - /* - * we are about to copy oldroot to bp, so set up the type - * of bp while we know exactly what it will be. - */ - xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF); } else { struct xfs_dir3_icleaf_hdr leafhdr; @@ -707,31 +720,17 @@ xfs_da3_root_split( size = (int)((char *)&leafhdr.ents[leafhdr.count] - (char *)leaf); level = 0; - - /* - * we are about to copy oldroot to bp, so set up the type - * of bp while we know exactly what it will be. - */ - xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF); } /* - * we can copy most of the information in the node from one block to - * another, but for CRC enabled headers we have to make sure that the - * block specific identifiers are kept intact. We update the buffer - * directly for this. + * Copy old root to new buffer and log it. */ - memcpy(node, oldroot, size); - if (oldroot->hdr.info.magic == cpu_to_be16(XFS_DA3_NODE_MAGIC) || - oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) { - struct xfs_da3_intnode *node3 = (struct xfs_da3_intnode *)node; - - node3->hdr.info.blkno = cpu_to_be64(xfs_buf_daddr(bp)); - } + xfs_da_buf_copy(bp, blk1->bp, size); xfs_trans_log_buf(tp, bp, 0, size - 1); - bp->b_ops = blk1->bp->b_ops; - xfs_trans_buf_copy_type(bp, blk1->bp); + /* + * Update blk1 to point to new buffer. + */ blk1->bp = bp; blk1->blkno = blkno; @@ -1220,21 +1219,14 @@ xfs_da3_root_join( xfs_da_blkinfo_onlychild_validate(bp->b_addr, oldroothdr.level); /* - * This could be copying a leaf back into the root block in the case of - * there only being a single leaf block left in the tree. Hence we have - * to update the b_ops pointer as well to match the buffer type change - * that could occur. For dir3 blocks we also need to update the block - * number in the buffer header. + * Copy child to root buffer and log it. */ - memcpy(root_blk->bp->b_addr, bp->b_addr, args->geo->blksize); - root_blk->bp->b_ops = bp->b_ops; - xfs_trans_buf_copy_type(root_blk->bp, bp); - if (oldroothdr.magic == XFS_DA3_NODE_MAGIC) { - struct xfs_da3_blkinfo *da3 = root_blk->bp->b_addr; - da3->blkno = cpu_to_be64(xfs_buf_daddr(root_blk->bp)); - } + xfs_da_buf_copy(root_blk->bp, bp, args->geo->blksize); xfs_trans_log_buf(args->trans, root_blk->bp, 0, args->geo->blksize - 1); + /* + * Now we can drop the child buffer. + */ error = xfs_da_shrink_inode(args, child, bp); return error; } @@ -2317,9 +2309,10 @@ xfs_da3_swap_lastblock( /* * Copy the last block into the dead buffer and log it. */ - memcpy(dead_buf->b_addr, last_buf->b_addr, args->geo->blksize); + xfs_da_buf_copy(dead_buf, last_buf, args->geo->blksize); xfs_trans_log_buf(tp, dead_buf, 0, args->geo->blksize - 1); dead_info = dead_buf->b_addr; + /* * Get values from the moved block. */ |