From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Tue, 16 Sep 2014 02:32:16 +0000 (-0700)
Subject: f2fs: update i_size when __allocate_data_block
X-Git-Tag: v4.9.8~5599^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=976e4c50aea111bc7193b48950a3b0c8bc0a25ff;p=platform%2Fkernel%2Flinux-rpi3.git

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 7749f30..aaf22a9 100644
--- 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;
 }