[PATCH 2.6.18] ext2: errors behaviour fix

[PATCH 2.6.18] ext2: errors behaviour fix

[Vasily Averin]

EXT2_ERRORS_CONTINUE should be read from the superblock as default value for
error behaviour.
parse_option() should clean the alternative options and should not change
default value taken from the superblock.

Signed-off-by:	Vasily Averin <vvs@sw.ru>
Acked-by:	Kirill Korotaev <dev@openvz.org>

--- linux-2.6.18/fs/ext2/super.c.e2erop	2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18/fs/ext2/super.c	2006-10-03 15:50:31.000000000 +0400
@@ -365,7 +365,6 @@ static int parse_options (char * options
 {
 	char * p;
 	substring_t args[MAX_OPT_ARGS];
-	unsigned long kind = EXT2_MOUNT_ERRORS_CONT;
 	int option;

 	if (!options)
@@ -405,13 +404,19 @@ static int parse_options (char * options
 			/* *sb_block = match_int(&args[0]); */
 			break;
 		case Opt_err_panic:
-			kind = EXT2_MOUNT_ERRORS_PANIC;
+			clear_opt (sbi->s_mount_opt, ERRORS_CONT);
+			clear_opt (sbi->s_mount_opt, ERRORS_RO);
+			set_opt (sbi->s_mount_opt, ERRORS_PANIC);
 			break;
 		case Opt_err_ro:
-			kind = EXT2_MOUNT_ERRORS_RO;
+			clear_opt (sbi->s_mount_opt, ERRORS_CONT);
+			clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
+			set_opt (sbi->s_mount_opt, ERRORS_RO);
 			break;
 		case Opt_err_cont:
-			kind = EXT2_MOUNT_ERRORS_CONT;
+			clear_opt (sbi->s_mount_opt, ERRORS_RO);
+			clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
+			set_opt (sbi->s_mount_opt, ERRORS_CONT);
 			break;
 		case Opt_nouid32:
 			set_opt (sbi->s_mount_opt, NO_UID32);
@@ -490,7 +495,6 @@ static int parse_options (char * options
 			return 0;
 		}
 	}
-	sbi->s_mount_opt |= kind;
 	return 1;
 }

@@ -710,6 +714,8 @@ static int ext2_fill_super(struct super_
 		set_opt(sbi->s_mount_opt, ERRORS_PANIC);
 	else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_RO)
 		set_opt(sbi->s_mount_opt, ERRORS_RO);
+	else
+		set_opt(sbi->s_mount_opt, ERRORS_CONT);

 	sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
 	sbi->s_resgid = le16_to_cpu(es->s_def_resgid);