f2fs: update i_size when __allocate_data_block

The f2fs_direct_IO uses __allocate_data_block, but inside the allocation path,
we should update i_size at the changed time to update its inode page.
Otherwise, we can get wrong i_size after roll-forward recovery.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 7749f305b102861e1854f598c26c420d7d5aea0f..aaf22a9120441291b2772ad78a21c82568b1c9b0 100644 (file)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -572,9 +572,11 @@ put_err:
 static int __allocate_data_block(struct dnode_of_data *dn)
 {
        struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+       struct f2fs_inode_info *fi = F2FS_I(dn->inode);
        struct f2fs_summary sum;
        block_t new_blkaddr;
        struct node_info ni;
+       pgoff_t fofs;
        int type;
 
        if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
@@ -597,6 +599,12 @@ static int __allocate_data_block(struct dnode_of_data *dn)
        update_extent_cache(new_blkaddr, dn);
        clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT);
 
+       /* update i_size */
+       fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
+                                                       dn->ofs_in_node;
+       if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT))
+               i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT));
+
        dn->data_blkaddr = new_blkaddr;
        return 0;
 }