[f2fs-dev] [PATCH 3/4] f2fs: record node block allocation in dnode_of_data

[Jaegeuk Kim]

This patch introduces recording node block allocation in dnode_of_data.
This information helps to figure out whether any node block is allocated during
specific file operations.

Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
 fs/f2fs/data.c | 1 +
 fs/f2fs/f2fs.h | 1 +
 fs/f2fs/file.c | 1 +
 fs/f2fs/node.c | 4 ++++
 4 files changed, 7 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index cf0c9dd..a7a9a05 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -226,6 +226,7 @@ void set_data_blkaddr(struct dnode_of_data *dn)
        addr_array = blkaddr_in_node(rn);
        addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
        set_page_dirty(node_page);
+       dn->node_changed = true;
 }
 
 int reserve_new_block(struct dnode_of_data *dn)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 90fb970..0f4d329 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -547,6 +547,7 @@ struct dnode_of_data {
        unsigned int ofs_in_node;       /* data offset in the node page */
        bool inode_page_locked;         /* inode page is locked or not */
        block_t data_blkaddr;           /* block address of the node block */
+       bool node_changed;              /* is node block changed */
 };
 
 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f2effe1..10ed357 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -484,6 +484,7 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, 
int count)
                dec_valid_block_count(sbi, dn->inode, nr_free);
                set_page_dirty(dn->node_page);
                sync_inode_page(dn);
+               dn->node_changed = true;
        }
        dn->ofs_in_node = ofs;
 
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 6cc8ac7..ff2acb1 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -542,6 +542,7 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t 
index, int mode)
 
                        set_nid(parent, offset[i - 1], nids[i], i == 1);
                        alloc_nid_done(sbi, nids[i]);
+                       dn->node_changed = true;
                        done = true;
                } else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
                        npage[i] = get_node_page_ra(parent, offset[i - 1]);
@@ -678,6 +679,7 @@ static int truncate_nodes(struct dnode_of_data *dn, 
unsigned int nofs,
                        if (ret < 0)
                                goto out_err;
                        set_nid(page, i, 0, false);
+                       dn->node_changed = true;
                }
        } else {
                child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1;
@@ -691,6 +693,7 @@ static int truncate_nodes(struct dnode_of_data *dn, 
unsigned int nofs,
                        ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
                        if (ret == (NIDS_PER_BLOCK + 1)) {
                                set_nid(page, i, 0, false);
+                               dn->node_changed = true;
                                child_nofs += ret;
                        } else if (ret < 0 && ret != -ENOENT) {
                                goto out_err;
@@ -752,6 +755,7 @@ static int truncate_partial_nodes(struct dnode_of_data *dn,
                if (err < 0)
                        goto fail;
                set_nid(pages[idx], i, 0, false);
+               dn->node_changed = true;
        }
 
        if (offset[idx + 1] == 0) {
-- 
2.5.4 (Apple Git-61)


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