ceph: add btime field to ceph_inode_info

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/inode.c

@@ -509,6 +509,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
 
 	INIT_WORK(&ci->i_work, ceph_inode_work);
 	ci->i_work_mask = 0;
+	memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
 
 	ceph_fscache_inode_init(ci);
 
@@ -813,6 +814,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
 		dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
 		     from_kuid(&init_user_ns, inode->i_uid),
 		     from_kgid(&init_user_ns, inode->i_gid));
+		ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
 		ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
 	}
 

fs/ceph/mds_client.c

@@ -150,14 +150,13 @@ static int parse_reply_info_in(void **p, void *end,
 			info->pool_ns_data = *p;
 			*p += info->pool_ns_len;
 		}
-		/* btime, change_attr */
-		{
-			struct ceph_timespec btime;
-			u64 change_attr;
-			ceph_decode_need(p, end, sizeof(btime), bad);
-			ceph_decode_copy(p, &btime, sizeof(btime));
-			ceph_decode_64_safe(p, end, change_attr, bad);
-		}
+
+		/* btime */
+		ceph_decode_need(p, end, sizeof(info->btime), bad);
+		ceph_decode_copy(p, &info->btime, sizeof(info->btime));
+
+		/* change attribute */
+		ceph_decode_skip_64(p, end, bad);
 
 		/* dir pin */
 		if (struct_v >= 2) {
@@ -206,6 +205,12 @@ static int parse_reply_info_in(void **p, void *end,
 			}
 		}
 
+		if (features & CEPH_FEATURE_FS_BTIME) {
+			ceph_decode_need(p, end, sizeof(info->btime), bad);
+			ceph_decode_copy(p, &info->btime, sizeof(info->btime));
+			ceph_decode_skip_64(p, end, bad);
+		}
+
 		info->dir_pin = -ENODATA;
 		/* info->snap_btime remains zero */
 	}

fs/ceph/mds_client.h

@@ -69,6 +69,7 @@ struct ceph_mds_reply_info_in {
 	u64 max_bytes;
 	u64 max_files;
 	s32 dir_pin;
+	struct ceph_timespec btime;
 	struct ceph_timespec snap_btime;
 };
 

fs/ceph/super.h

@@ -384,6 +384,7 @@ struct ceph_inode_info {
 	int i_snap_realm_counter; /* snap realm (if caps) */
 	struct list_head i_snap_realm_item;
 	struct list_head i_snap_flush_item;
+	struct timespec64 i_btime;
 	struct timespec64 i_snap_btime;
 
 	struct work_struct i_work;