1 files changed, 31 insertions, 21 deletions

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 6e50223b3299..5546ca225ffe 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -916,21 +916,24 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
 			"Not enough memory for storing quotafile name");
 		return 0;
 	}
-	if (sbi->s_qf_names[qtype] &&
-		strcmp(sbi->s_qf_names[qtype], qname)) {
-		ext3_msg(sb, KERN_ERR,
-			"%s quota file already specified", QTYPE2NAME(qtype));
+	if (sbi->s_qf_names[qtype]) {
+		int same = !strcmp(sbi->s_qf_names[qtype], qname);
+
 		kfree(qname);
-		return 0;
+		if (!same) {
+			ext3_msg(sb, KERN_ERR,
+				 "%s quota file already specified",
+				 QTYPE2NAME(qtype));
+		}
+		return same;
 	}
-	sbi->s_qf_names[qtype] = qname;
-	if (strchr(sbi->s_qf_names[qtype], '/')) {
+	if (strchr(qname, '/')) {
 		ext3_msg(sb, KERN_ERR,
 			"quotafile must be on filesystem root");
-		kfree(sbi->s_qf_names[qtype]);
-		sbi->s_qf_names[qtype] = NULL;
+		kfree(qname);
 		return 0;
 	}
+	sbi->s_qf_names[qtype] = qname;
 	set_opt(sbi->s_mount_opt, QUOTA);
 	return 1;
 }
@@ -945,11 +948,10 @@ static int clear_qf_name(struct super_block *sb, int qtype) {
 			" when quota turned on");
 		return 0;
 	}
-	/*
-	 * The space will be released later when all options are confirmed
-	 * to be correct
-	 */
-	sbi->s_qf_names[qtype] = NULL;
+	if (sbi->s_qf_names[qtype]) {
+		kfree(sbi->s_qf_names[qtype]);
+		sbi->s_qf_names[qtype] = NULL;
+	}
 	return 1;
 }
 #endif
@@ -2065,6 +2067,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
 		test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
 		"writeback");
+	sb->s_flags |= MS_SNAP_STABLE;
 
 	return 0;
 
@@ -2605,7 +2608,18 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 #ifdef CONFIG_QUOTA
 	old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
 	for (i = 0; i < MAXQUOTAS; i++)
-		old_opts.s_qf_names[i] = sbi->s_qf_names[i];
+		if (sbi->s_qf_names[i]) {
+			old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i],
+							 GFP_KERNEL);
+			if (!old_opts.s_qf_names[i]) {
+				int j;
+
+				for (j = 0; j < i; j++)
+					kfree(old_opts.s_qf_names[j]);
+				return -ENOMEM;
+			}
+		} else
+			old_opts.s_qf_names[i] = NULL;
 #endif
 
 	/*
@@ -2698,9 +2712,7 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 #ifdef CONFIG_QUOTA
 	/* Release old quota file names */
 	for (i = 0; i < MAXQUOTAS; i++)
-		if (old_opts.s_qf_names[i] &&
-		    old_opts.s_qf_names[i] != sbi->s_qf_names[i])
-			kfree(old_opts.s_qf_names[i]);
+		kfree(old_opts.s_qf_names[i]);
 #endif
 	if (enable_quota)
 		dquot_resume(sb, -1);
@@ -2714,9 +2726,7 @@ restore_opts:
 #ifdef CONFIG_QUOTA
 	sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
 	for (i = 0; i < MAXQUOTAS; i++) {
-		if (sbi->s_qf_names[i] &&
-		    old_opts.s_qf_names[i] != sbi->s_qf_names[i])
-			kfree(sbi->s_qf_names[i]);
+		kfree(sbi->s_qf_names[i]);
 		sbi->s_qf_names[i] = old_opts.s_qf_names[i];
 	}
 #endif