gfs2-utils: master - gfs2_tool: Use FIFREEZE/FITHAW ioctl

[Steven Whitehouse <swhiteho@fedoraproject.org>]

Gitweb:        http://git.fedorahosted.org/git/gfs2-utils.git?p=gfs2-utils.git;a=commitdiff;h=39f775e9824fefdedbf9020abf86b4399537e563
Commit:        39f775e9824fefdedbf9020abf86b4399537e563
Parent:        938529b7cd58a007eadbefea716ecbdee5218050
Author:        Steven Whitehouse <swhiteho@redhat.com>
AuthorDate:    Fri May 22 12:27:42 2009 +0100
Committer:     Steven Whitehouse <swhiteho@redhat.com>
CommitterDate: Fri May 22 12:27:42 2009 +0100

gfs2_tool: Use FIFREEZE/FITHAW ioctl

Updates gfs2_tool to use the generic ioctl rather than
the GFS2 specific interface. Eventually that interface
will be removed, and to the best of my knowledge, this
tool is the only userland package using it.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---
 gfs2/tool/misc.c |   25 ++++++++++++++-----------
 1 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/gfs2/tool/misc.c b/gfs2/tool/misc.c
index df422bd..649c354 100644
--- a/gfs2/tool/misc.c
+++ b/gfs2/tool/misc.c
@@ -23,6 +23,11 @@
 #include "gfs2_tool.h"
 #include "iflags.h"
 
+#ifndef FIFREZE
+#define FIFREEZE        _IOWR('X', 119, int)    /* Freeze */
+#define FITHAW          _IOWR('X', 120, int)    /* Thaw */
+#endif
+
 #define SYS_BASE "/sys/fs/gfs2" /* FIXME: Look in /proc/mounts to find this */
 
 /**
@@ -32,37 +37,35 @@
  *
  */
 
-void
-do_freeze(int argc, char **argv)
+void do_freeze(int argc, char **argv)
 {
 	char *command = argv[optind - 1];
-	char *name;
+	int fd;
 
 	if (optind == argc)
 		die("Usage: gfs2_tool %s <mountpoint>\n", command);
 
-	name = mp2fsname2(argv[optind]);
-	if (!name) {
+	fd = open(argv[optind], O_NOCTTY|O_RDONLY);
+	if (fd < 0) {
 		fprintf(stderr, _("Couldn't find a GFS2 filesystem mounted at %s\n"),
 				argv[optind]);
 		exit(-1);
 	}
 
 	if (strcmp(command, "freeze") == 0) {
-		if (set_sysfs(name, "freeze", "1")) {
-			fprintf(stderr, _("Error writing to sysfs freeze file: %s\n"),
+		if (ioctl(fd, FIFREEZE, 0)) {
+			fprintf(stderr, _("Error freezing fs: %s\n"),
 					strerror(errno));
 			exit(-1);
 		}
 	} else if (strcmp(command, "unfreeze") == 0) {
-		if (set_sysfs(name, "freeze", "0")) {
-			fprintf(stderr, _("Error writing to sysfs freeze file: %s\n"),
+		if (ioctl(fd, FITHAW, 0)) {
+			fprintf(stderr, _("Error thawing fs: %s\n"),
 					strerror(errno));
 			exit(-1);
 		}
 	}
-
-	sync();
+	close(fd);
 }
 
 /**