/* * XXX: helper to validate and adjust moving goal. */ static int ocfs2_validate_and_adjust_move_goal(struct inode *inode, struct ocfs2_move_extents *range) { int ret, goal_bit = 0; struct buffer_head *gd_bh = NULL; struct ocfs2_group_desc *bg; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); int c_to_b = 1 << (osb->s_clustersize_bits - inode->i_sb->s_blocksize_bits); /* * make goal become cluster aligned. */ range->me_goal = ocfs2_block_to_cluster_start(inode->i_sb, range->me_goal); /* * validate goal sits within global_bitmap, and return the victim * group desc */ ret = ocfs2_find_victim_alloc_group(inode, range->me_goal, GLOBAL_BITMAP_SYSTEM_INODE, OCFS2_INVALID_SLOT, &goal_bit, &gd_bh); if (ret) goto out; bg = (struct ocfs2_group_desc *)gd_bh->b_data; /* * moving goal is not allowd to start with a group desc blok(#0 blk) * let's compromise to the latter cluster. */ if (range->me_goal == le64_to_cpu(bg->bg_blkno)) range->me_goal += c_to_b; /* * movement is not gonna cross two groups. */ if ((le16_to_cpu(bg->bg_bits) - goal_bit) * osb->s_clustersize < range->me_len) { ret = -EINVAL; goto out; } /* * more exact validations/adjustments will be performed later during * moving operation for each extent range. */ mlog(0, "extents get ready to be moved to #%llu block\n", range->me_goal); out: brelse(gd_bh); return ret; }
static int ocfs2_validate_and_adjust_move_goal(struct inode *inode, struct ocfs2_move_extents *range) { int ret, goal_bit = 0; struct buffer_head *gd_bh = NULL; struct ocfs2_group_desc *bg = NULL; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); int c_to_b = 1 << (osb->s_clustersize_bits - inode->i_sb->s_blocksize_bits); range->me_goal = ocfs2_block_to_cluster_start(inode->i_sb, range->me_goal); if (range->me_goal == le64_to_cpu(bg->bg_blkno)) range->me_goal += c_to_b; ret = ocfs2_find_victim_alloc_group(inode, range->me_goal, GLOBAL_BITMAP_SYSTEM_INODE, OCFS2_INVALID_SLOT, &goal_bit, &gd_bh); if (ret) goto out; bg = (struct ocfs2_group_desc *)gd_bh->b_data; if ((le16_to_cpu(bg->bg_bits) - goal_bit) * osb->s_clustersize < range->me_len) { ret = -EINVAL; goto out; } mlog(0, "extents get ready to be moved to #%llu block\n", range->me_goal); out: brelse(gd_bh); return ret; }