[PATCH v2 30/35] ubifs: adapt quota space informatin in do_setattr

[Dongsheng Yang]

In do_setattr, there is a possibility to change the size of
a file. In this case, we have to notify the changed size to
quota subsystem.

Signed-off-by: Dongsheng Yang <yangds.fnst at cn.fujitsu.com>
---
 fs/ubifs/file.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 1e8ee41..24af30c 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1250,6 +1250,17 @@ static int do_setattr(struct ubifs_info *c, struct inode *inode,
 
 	if (attr->ia_valid & ATTR_SIZE) {
 		dbg_gen("size %lld -> %lld", inode->i_size, new_size);
+		if (S_ISREG(inode->i_mode)) {
+			if (new_size > inode->i_size) {
+				err = dquot_alloc_space_nodirty(inode, new_size - inode->i_size);
+				if (err) {
+					ubifs_release_budget(c, &req);
+					return err;
+				}
+			} else {
+				dquot_free_space_nodirty(inode, inode->i_size - new_size);
+			}
+		}
 		truncate_setsize(inode, new_size);
 	}
 
-- 
1.8.4.2