Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / ocfs2 / cluster / masklog.c

diff --git a/kernel/fs/ocfs2/cluster/masklog.c b/kernel/fs/ocfs2/cluster/masklog.c
new file mode 100644 (file)
index 0000000..af7598b
--- /dev/null
+++ b/kernel/fs/ocfs2/cluster/masklog.c
@@ -0,0 +1,155 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/string.h>
+#include <asm/uaccess.h>
+
+#include "masklog.h"
+
+struct mlog_bits mlog_and_bits = MLOG_BITS_RHS(MLOG_INITIAL_AND_MASK);
+EXPORT_SYMBOL_GPL(mlog_and_bits);
+struct mlog_bits mlog_not_bits = MLOG_BITS_RHS(0);
+EXPORT_SYMBOL_GPL(mlog_not_bits);
+
+static ssize_t mlog_mask_show(u64 mask, char *buf)
+{
+       char *state;
+
+       if (__mlog_test_u64(mask, mlog_and_bits))
+               state = "allow";
+       else if (__mlog_test_u64(mask, mlog_not_bits))
+               state = "deny";
+       else
+               state = "off";
+
+       return snprintf(buf, PAGE_SIZE, "%s\n", state);
+}
+
+static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count)
+{
+       if (!strncasecmp(buf, "allow", 5)) {
+               __mlog_set_u64(mask, mlog_and_bits);
+               __mlog_clear_u64(mask, mlog_not_bits);
+       } else if (!strncasecmp(buf, "deny", 4)) {
+               __mlog_set_u64(mask, mlog_not_bits);
+               __mlog_clear_u64(mask, mlog_and_bits);
+       } else if (!strncasecmp(buf, "off", 3)) {
+               __mlog_clear_u64(mask, mlog_not_bits);
+               __mlog_clear_u64(mask, mlog_and_bits);
+       } else
+               return -EINVAL;
+
+       return count;
+}
+
+struct mlog_attribute {
+       struct attribute attr;
+       u64 mask;
+};
+
+#define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr)
+
+#define define_mask(_name) {                   \
+       .attr = {                               \
+               .name = #_name,                 \
+               .mode = S_IRUGO | S_IWUSR,      \
+       },                                      \
+       .mask = ML_##_name,                     \
+}
+
+static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
+       define_mask(TCP),
+       define_mask(MSG),
+       define_mask(SOCKET),
+       define_mask(HEARTBEAT),
+       define_mask(HB_BIO),
+       define_mask(DLMFS),
+       define_mask(DLM),
+       define_mask(DLM_DOMAIN),
+       define_mask(DLM_THREAD),
+       define_mask(DLM_MASTER),
+       define_mask(DLM_RECOVERY),
+       define_mask(DLM_GLUE),
+       define_mask(VOTE),
+       define_mask(CONN),
+       define_mask(QUORUM),
+       define_mask(BASTS),
+       define_mask(CLUSTER),
+       define_mask(ERROR),
+       define_mask(NOTICE),
+       define_mask(KTHREAD),
+};
+
+static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, };
+
+static ssize_t mlog_show(struct kobject *obj, struct attribute *attr,
+                        char *buf)
+{
+       struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
+
+       return mlog_mask_show(mlog_attr->mask, buf);
+}
+
+static ssize_t mlog_store(struct kobject *obj, struct attribute *attr,
+                         const char *buf, size_t count)
+{
+       struct mlog_attribute *mlog_attr = to_mlog_attr(attr);
+
+       return mlog_mask_store(mlog_attr->mask, buf, count);
+}
+
+static const struct sysfs_ops mlog_attr_ops = {
+       .show  = mlog_show,
+       .store = mlog_store,
+};
+
+static struct kobj_type mlog_ktype = {
+       .default_attrs = mlog_attr_ptrs,
+       .sysfs_ops     = &mlog_attr_ops,
+};
+
+static struct kset mlog_kset = {
+       .kobj   = {.ktype = &mlog_ktype},
+};
+
+int mlog_sys_init(struct kset *o2cb_kset)
+{
+       int i = 0;
+
+       while (mlog_attrs[i].attr.mode) {
+               mlog_attr_ptrs[i] = &mlog_attrs[i].attr;
+               i++;
+       }
+       mlog_attr_ptrs[i] = NULL;
+
+       kobject_set_name(&mlog_kset.kobj, "logmask");
+       mlog_kset.kobj.kset = o2cb_kset;
+       return kset_register(&mlog_kset);
+}
+
+void mlog_sys_shutdown(void)
+{
+       kset_unregister(&mlog_kset);
+}