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-rw-r--r--fs/ocfs2/super.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index ac61eeaf3837..71ea9ce71a6b 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -175,6 +175,7 @@ enum {
Opt_dir_resv_level,
Opt_journal_async_commit,
Opt_err_cont,
+ Opt_nocluster,
Opt_err,
};
@@ -208,6 +209,7 @@ static const match_table_t tokens = {
{Opt_dir_resv_level, "dir_resv_level=%u"},
{Opt_journal_async_commit, "journal_async_commit"},
{Opt_err_cont, "errors=continue"},
+ {Opt_nocluster, "nocluster"},
{Opt_err, NULL}
};
@@ -619,6 +621,13 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
goto out;
}
+ tmp = OCFS2_MOUNT_NOCLUSTER;
+ if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
+ ret = -EINVAL;
+ mlog(ML_ERROR, "Cannot change nocluster option on remount\n");
+ goto out;
+ }
+
tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
OCFS2_MOUNT_HB_NONE;
if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
@@ -859,6 +868,7 @@ static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
}
if (ocfs2_userspace_stack(osb) &&
+ !(osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
OCFS2_STACK_LABEL_LEN)) {
mlog(ML_ERROR,
@@ -1139,6 +1149,11 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
"ordered");
+ if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
+ !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT))
+ printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted "
+ "without cluster aware mode.\n", osb->dev_str);
+
atomic_set(&osb->vol_state, VOLUME_MOUNTED);
wake_up(&osb->osb_mount_event);
@@ -1445,6 +1460,9 @@ static int ocfs2_parse_options(struct super_block *sb,
case Opt_journal_async_commit:
mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
break;
+ case Opt_nocluster:
+ mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER;
+ break;
default:
mlog(ML_ERROR,
"Unrecognized mount option \"%s\" "
@@ -1556,6 +1574,9 @@ static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
seq_printf(s, ",journal_async_commit");
+ if (opts & OCFS2_MOUNT_NOCLUSTER)
+ seq_printf(s, ",nocluster");
+
return 0;
}