proc_parse: Remember a type of FS provided by a kernel

We will need it for btrfs handling. Also print out the
FS type for easier debug

 | (00.003545)     type unsupported (cgroup) source cgroup 1c / @ /sys/fs/cgroup/blkio flags 30000e options blkio,
 | (00.003558)     type unsupported (cgroup) source cgroup 1d / @ /sys/fs/cgroup/perf_event flags 30000e options perf_event,
 | (00.003571)     type unsupported (cgroup) source cgroup 1e / @ /sys/fs/cgroup/hugetlb flags 30000e options hugetlb,
 | (00.003584)     type unsupported (ext4) source /dev/sda2 800002 / @ / flags 300000 options data=ordered,
 | (00.003670)     type tmpfs (tmpfs) source tmpfs 20 / @ /tmp flags 100000 options
 | (00.003696)     type unsupported (mqueue) source mqueue d / @ /dev/mqueue flags 300000 options
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/proc_parse.h

@@ -107,6 +107,7 @@ struct mount_info {
 	int		master_id;
 	int		shared_id;
 	struct fstype	*fstype;
+	char		*kfstype;
 	char		*source;
 	char		*options;
 	bool		mounted;

mount.c

@@ -1109,6 +1109,7 @@ void mnt_entry_free(struct mount_info *mi)
 
 	xfree(mi->root);
 	xfree(mi->mountpoint);
+	xfree(mi->kfstype);
 	xfree(mi->source);
 	xfree(mi->options);
 	xfree(mi);

proc_parse.c

@@ -760,6 +760,9 @@ static int parse_mountinfo_ent(char *str, struct mount_info *new)
 		return -1;
 
 	ret = -1;
+	new->kfstype = xstrdup(fstype);
+	if (!new->kfstype)
+		goto err;
 	new->fstype = find_fstype_by_name(fstype);
 
 	new->options = xmalloc(strlen(opt) + 1);
@@ -806,8 +809,8 @@ struct mount_info *parse_mountinfo(pid_t pid)
 			goto err;
 		}
 
-		pr_info("\ttype %s source %s %x %s @ %s flags %x options %s\n",
-				new->fstype->name, new->source,
+		pr_info("\ttype %s (%s) source %s %x %s @ %s flags %x options %s\n",
+				new->fstype->name, new->kfstype, new->source,
 				new->s_dev, new->root, new->mountpoint,
 				new->flags, new->options);
 	}