add freeze

debugfs.c

@@ -37,6 +37,9 @@ extern char *optarg;
 #include "jfs_user.h"
 #include "support/plausible.h"
 
+#include <linux/fs.h>
+#include <sys/ioctl.h>
+
 #ifndef BUFSIZ
 #define BUFSIZ 8192
 #endif
@@ -53,6 +56,9 @@ ext2_filsys	current_fs;
 quota_ctx_t	current_qctx;
 ext2_ino_t	root, cwd;
 
+static int fdDev = 0;
+static int g_open_flags = 0;
+
 static int debugfs_setup_tdb(const char *device_name, char *undo_file,
 			     io_manager *io_ptr)
 {
@@ -129,7 +135,8 @@ err:
 
 static void open_filesystem(char *device, int open_flags, blk64_t superblock,
 			    blk64_t blocksize, int catastrophic,
-			    char *data_filename, char *undo_file)
+			    char *data_filename, char *undo_file,
+				char *mnt_pt)
 {
 	int	retval;
 	io_channel data_io = 0;
@@ -170,7 +177,16 @@ static void open_filesystem(char *device, int open_flags, blk64_t superblock,
 			exit(1);
 	}
 
-	printf("1%s 2%d 3%llu 4%llu \n", device, open_flags, superblock, blocksize);
+	//printf("1%s 2%d 3%llu 4%llu \n", device, open_flags, superblock, blocksize);
+    if (mnt_pt) {
+        fdDev = open(mnt_pt, O_RDONLY);
+        retval = ioctl(fdDev, FIFREEZE, 0);
+        if (retval) {
+            com_err(device, retval, "freezing filesystem failed");
+            return;
+        }
+    }
+    g_open_flags = open_flags;
 
 	retval = ext2fs_open(device, open_flags, superblock, blocksize,
 			     io_ptr, &current_fs);
@@ -211,6 +227,12 @@ static void open_filesystem(char *device, int open_flags, blk64_t superblock,
 	return;
 
 errout:
+	if (fdDev) {
+		retval = ioctl(fdDev, FITHAW, 0);
+		if (retval)
+			com_err(device, retval, "thaw filesystem failed");
+	}
+
 	retval = ext2fs_close_free(&current_fs);
 	if (retval)
 		com_err(device, retval, "while trying to close filesystem");
@@ -225,9 +247,10 @@ void do_open_filesys(int argc, char **argv)
 	int	open_flags = EXT2_FLAG_SOFTSUPP_FEATURES | EXT2_FLAG_64BITS; 
 	char	*data_filename = 0;
 	char	*undo_file = NULL;
+	char 	*mnt_pt = NULL;
 
 	reset_getopt();
-	while ((c = getopt(argc, argv, "iwfecb:s:d:Dz:")) != EOF) {
+	while ((c = getopt(argc, argv, "iwfecb:s:d:Dz:m:")) != EOF) {
 		switch (c) {
 		case 'i':
 			open_flags |= EXT2_FLAG_IMAGE_FILE;
@@ -251,6 +274,9 @@ void do_open_filesys(int argc, char **argv)
 		case 'd':
 			data_filename = optarg;
 			break;
+		case 'm':
+			mnt_pt = optarg;
+			break;
 		case 'D':
 			open_flags |= EXT2_FLAG_DIRECT_IO;
 			break;
@@ -280,11 +306,11 @@ void do_open_filesys(int argc, char **argv)
 		return;
 	open_filesystem(argv[optind], open_flags,
 			superblock, blocksize, catastrophic,
-			data_filename, undo_file);
+			data_filename, undo_file, mnt_pt);
 	return;
 
 print_usage:
-	fprintf(stderr, "%s: Usage: open [-s superblock] [-b blocksize] "
+	fprintf(stderr, "%s: Usage: open [-s superblock][-m mnt_point] [-b blocksize] "
 		"[-d image_filename] [-c] [-i] [-f] [-e] [-D] "
 #ifndef READ_ONLY
 		"[-w] "
@@ -297,6 +323,14 @@ print_usage:
 static void close_filesystem(NOARGS)
 {
 	int	retval;
+	g_open_flags = 0;
+
+	if (fdDev) {
+        retval = ioctl(fdDev, FITHAW, 0);
+        if (retval)
+            com_err("thaw filesystem failed", retval, 0);
+        fdDev = 0;
+    }
 
 	if (current_fs->flags & EXT2_FLAG_IB_DIRTY) {
 		retval = ext2fs_write_inode_bitmap(current_fs);
@@ -1845,7 +1879,7 @@ int main(int argc, char **argv)
 {
 	int		retval;
 	const char	*usage = 
-		"Usage: %s [-b blocksize] [-s superblock] [-f cmd_file] "
+		"Usage: %s [-b blocksize] [-m mnt_point] [-s superblock] [-f cmd_file] "
 		"[-R request] [-V] ["
 #ifndef READ_ONLY
 		"[-w] [-z undo_file] "
@@ -1854,6 +1888,7 @@ int main(int argc, char **argv)
 	int		c;
 	int		open_flags = EXT2_FLAG_SOFTSUPP_FEATURES | EXT2_FLAG_64BITS;
 	char		*request = 0;
+	char		*mnt_pt = 0;
 	int		exit_status = 0;
 	char		*cmd_file = 0;
 	blk64_t		superblock = 0;
@@ -1861,9 +1896,9 @@ int main(int argc, char **argv)
 	int		catastrophic = 0;
 	char		*data_filename = 0;
 #ifdef READ_ONLY
-	const char	*opt_string = "nicR:f:b:s:Vd:D";
+	const char	*opt_string = "nicR:f:b:s:Vd:Dm:";
 #else
-	const char	*opt_string = "niwcR:f:b:s:Vd:Dz:";
+	const char	*opt_string = "niwcR:f:b:s:Vd:Dz:m:";
 	char		*undo_file = NULL;
 #endif
 #ifdef CONFIG_JBD_DEBUG
@@ -1898,6 +1933,9 @@ int main(int argc, char **argv)
 		case 'R':
 			request = optarg;
 			break;
+		case 'm':
+			mnt_pt = optarg;
+			break;
 		case 'f':
 			cmd_file = optarg;
 			break;
@@ -1948,7 +1986,7 @@ int main(int argc, char **argv)
 	if (optind < argc)
 		open_filesystem(argv[optind], open_flags,
 				superblock, blocksize, catastrophic,
-				data_filename, undo_file);
+				data_filename, undo_file, mnt_pt);
 
 	sci_idx = ss_create_invocation(debug_prog_name, "0.0", (char *) NULL,
 				       &debug_cmds, &retval);