Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

[firefly-linux-kernel-4.4.55.git] / fs / ext3 / super.c

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 524b349c6299ca248b366cf299071939e5843aba..a8d80a7f11050d7a518e79ac003701d12865b3a7 100644 (file)
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -543,6 +543,19 @@ static inline void ext3_show_quota_options(struct seq_file *seq, struct super_bl
 #endif
 }
 
+static char *data_mode_string(unsigned long mode)
+{
+       switch (mode) {
+       case EXT3_MOUNT_JOURNAL_DATA:
+               return "journal";
+       case EXT3_MOUNT_ORDERED_DATA:
+               return "ordered";
+       case EXT3_MOUNT_WRITEBACK_DATA:
+               return "writeback";
+       }
+       return "unknown";
+}
+
 /*
  * Show an option if
  *  - it's set to a non-default value OR
@@ -616,13 +629,8 @@ static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
        if (test_opt(sb, NOBH))
                seq_puts(seq, ",nobh");
 
-       if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
-               seq_puts(seq, ",data=journal");
-       else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
-               seq_puts(seq, ",data=ordered");
-       else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
-               seq_puts(seq, ",data=writeback");
-
+       seq_printf(seq, ",data=%s", data_mode_string(sbi->s_mount_opt &
+                                                    EXT3_MOUNT_DATA_FLAGS));
        if (test_opt(sb, DATA_ERR_ABORT))
                seq_puts(seq, ",data_err=abort");
 
@@ -1024,12 +1032,18 @@ static int parse_options (char *options, struct super_block *sb,
                datacheck:
                        if (is_remount) {
                                if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
-                                               != data_opt) {
-                                       printk(KERN_ERR
-                                               "EXT3-fs: cannot change data "
-                                               "mode on remount\n");
-                                       return 0;
-                               }
+                                               == data_opt)
+                                       break;
+                               printk(KERN_ERR
+                                       "EXT3-fs (device %s): Cannot change "
+                                       "data mode on remount. The filesystem "
+                                       "is mounted in data=%s mode and you "
+                                       "try to remount it in data=%s mode.\n",
+                                       sb->s_id,
+                                       data_mode_string(sbi->s_mount_opt &
+                                                       EXT3_MOUNT_DATA_FLAGS),
+                                       data_mode_string(data_opt));
+                               return 0;
                        } else {
                                sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
                                sbi->s_mount_opt |= data_opt;