/* * 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; }
static int ocfs2_move_extent(struct ocfs2_move_extents_context *context, u32 cpos, u32 phys_cpos, u32 *new_phys_cpos, u32 len, int ext_flags) { int ret, credits = 0, extra_blocks = 0, goal_bit = 0; handle_t *handle; struct inode *inode = context->inode; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct inode *tl_inode = osb->osb_tl_inode; struct inode *gb_inode = NULL; struct buffer_head *gb_bh = NULL; struct buffer_head *gd_bh = NULL; struct ocfs2_group_desc *gd; struct ocfs2_refcount_tree *ref_tree = NULL; u32 move_max_hop = ocfs2_blocks_to_clusters(inode->i_sb, context->range->me_threshold); u64 phys_blkno, new_phys_blkno; phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); if ((ext_flags & OCFS2_EXT_REFCOUNTED) && len) { BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); BUG_ON(!context->refcount_loc); ret = ocfs2_lock_refcount_tree(osb, context->refcount_loc, 1, &ref_tree, NULL); if (ret) { mlog_errno(ret); return ret; } ret = ocfs2_prepare_refcount_change_for_del(inode, context->refcount_loc, phys_blkno, len, &credits, &extra_blocks); if (ret) { mlog_errno(ret); goto out; } } ret = ocfs2_lock_allocators_move_extents(inode, &context->et, len, 1, &context->meta_ac, NULL, extra_blocks, &credits); if (ret) { mlog_errno(ret); goto out; } /* * need to count 2 extra credits for global_bitmap inode and * group descriptor. */ credits += OCFS2_INODE_UPDATE_CREDITS + 1; /* * ocfs2_move_extent() didn't reserve any clusters in lock_allocators() * logic, while we still need to lock the global_bitmap. */ gb_inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, OCFS2_INVALID_SLOT); if (!gb_inode) { mlog(ML_ERROR, "unable to get global_bitmap inode\n"); ret = -EIO; goto out; } inode_lock(gb_inode); ret = ocfs2_inode_lock(gb_inode, &gb_bh, 1); if (ret) { mlog_errno(ret); goto out_unlock_gb_mutex; } inode_lock(tl_inode); handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); mlog_errno(ret); goto out_unlock_tl_inode; } new_phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, *new_phys_cpos); ret = ocfs2_find_victim_alloc_group(inode, new_phys_blkno, GLOBAL_BITMAP_SYSTEM_INODE, OCFS2_INVALID_SLOT, &goal_bit, &gd_bh); if (ret) { mlog_errno(ret); goto out_commit; } /* * probe the victim cluster group to find a proper * region to fit wanted movement, it even will perfrom * a best-effort attempt by compromising to a threshold * around the goal. */ ocfs2_probe_alloc_group(inode, gd_bh, &goal_bit, len, move_max_hop, new_phys_cpos); if (!*new_phys_cpos)
static int ocfs2_move_extent(struct ocfs2_move_extents_context *context, u32 cpos, u32 phys_cpos, u32 *new_phys_cpos, u32 len, int ext_flags) { int ret, credits = 0, extra_blocks = 0, goal_bit = 0; handle_t *handle; struct inode *inode = context->inode; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct inode *tl_inode = osb->osb_tl_inode; struct inode *gb_inode = NULL; struct buffer_head *gb_bh = NULL; struct buffer_head *gd_bh = NULL; struct ocfs2_group_desc *gd; struct ocfs2_refcount_tree *ref_tree = NULL; u32 move_max_hop = ocfs2_blocks_to_clusters(inode->i_sb, context->range->me_threshold); u64 phys_blkno, new_phys_blkno; phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); if ((ext_flags & OCFS2_EXT_REFCOUNTED) && len) { BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); BUG_ON(!context->refcount_loc); ret = ocfs2_lock_refcount_tree(osb, context->refcount_loc, 1, &ref_tree, NULL); if (ret) { mlog_errno(ret); return ret; } ret = ocfs2_prepare_refcount_change_for_del(inode, context->refcount_loc, phys_blkno, len, &credits, &extra_blocks); if (ret) { mlog_errno(ret); goto out; } } ret = ocfs2_lock_allocators_move_extents(inode, &context->et, len, 1, &context->meta_ac, NULL, extra_blocks, &credits); if (ret) { mlog_errno(ret); goto out; } credits += OCFS2_INODE_UPDATE_CREDITS + 1; gb_inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, OCFS2_INVALID_SLOT); if (!gb_inode) { mlog(ML_ERROR, "unable to get global_bitmap inode\n"); ret = -EIO; goto out; } mutex_lock(&gb_inode->i_mutex); ret = ocfs2_inode_lock(gb_inode, &gb_bh, 1); if (ret) { mlog_errno(ret); goto out_unlock_gb_mutex; } mutex_lock(&tl_inode->i_mutex); handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); mlog_errno(ret); goto out_unlock_tl_inode; } new_phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, *new_phys_cpos); ret = ocfs2_find_victim_alloc_group(inode, new_phys_blkno, GLOBAL_BITMAP_SYSTEM_INODE, OCFS2_INVALID_SLOT, &goal_bit, &gd_bh); if (ret) { mlog_errno(ret); goto out_commit; } ocfs2_probe_alloc_group(inode, gd_bh, &goal_bit, len, move_max_hop, new_phys_cpos); if (!*new_phys_cpos) { ret = -ENOSPC; goto out_commit; } ret = __ocfs2_move_extent(handle, context, cpos, len, phys_cpos, *new_phys_cpos, ext_flags); if (ret) { mlog_errno(ret); goto out_commit; } gd = (struct ocfs2_group_desc *)gd_bh->b_data; ret = ocfs2_alloc_dinode_update_counts(gb_inode, handle, gb_bh, len, le16_to_cpu(gd->bg_chain)); if (ret) { mlog_errno(ret); goto out_commit; } ret = ocfs2_block_group_set_bits(handle, gb_inode, gd, gd_bh, goal_bit, len); if (ret) mlog_errno(ret); ret = ocfs2_cow_sync_writeback(inode->i_sb, context->inode, cpos, len); if (ret) mlog_errno(ret); out_commit: ocfs2_commit_trans(osb, handle); brelse(gd_bh); out_unlock_tl_inode: mutex_unlock(&tl_inode->i_mutex); ocfs2_inode_unlock(gb_inode, 1); out_unlock_gb_mutex: mutex_unlock(&gb_inode->i_mutex); brelse(gb_bh); iput(gb_inode); out: if (context->meta_ac) { ocfs2_free_alloc_context(context->meta_ac); context->meta_ac = NULL; } if (ref_tree) ocfs2_unlock_refcount_tree(osb, ref_tree, 1); return ret; }