[GFS2] The lock modules for GFS2
This patch contains the pluggable locking modules
for GFS2.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/locking/dlm/sysfs.c b/fs/gfs2/locking/dlm/sysfs.c
new file mode 100644
index 0000000..8964733
--- /dev/null
+++ b/fs/gfs2/locking/dlm/sysfs.c
@@ -0,0 +1,315 @@
+/******************************************************************************
+*******************************************************************************
+**
+** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
+**
+** This copyrighted material is made available to anyone wishing to use,
+** modify, copy, or redistribute it subject to the terms and conditions
+** of the GNU General Public License v.2.
+**
+*******************************************************************************
+******************************************************************************/
+
+#include <linux/ctype.h>
+#include <linux/stat.h>
+
+#include "lock_dlm.h"
+
+static ssize_t gdlm_block_show(struct gdlm_ls *ls, char *buf)
+{
+ ssize_t ret;
+ int val = 0;
+
+ if (test_bit(DFL_BLOCK_LOCKS, &ls->flags))
+ val = 1;
+ ret = sprintf(buf, "%d\n", val);
+ return ret;
+}
+
+static ssize_t gdlm_block_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ssize_t ret = len;
+ int val;
+
+ val = simple_strtol(buf, NULL, 0);
+
+ if (val == 1)
+ set_bit(DFL_BLOCK_LOCKS, &ls->flags);
+ else if (val == 0) {
+ clear_bit(DFL_BLOCK_LOCKS, &ls->flags);
+ gdlm_submit_delayed(ls);
+ } else
+ ret = -EINVAL;
+ return ret;
+}
+
+static ssize_t gdlm_mounted_show(struct gdlm_ls *ls, char *buf)
+{
+ ssize_t ret;
+ int val = -2;
+
+ if (test_bit(DFL_TERMINATE, &ls->flags))
+ val = -1;
+ else if (test_bit(DFL_LEAVE_DONE, &ls->flags))
+ val = 0;
+ else if (test_bit(DFL_JOIN_DONE, &ls->flags))
+ val = 1;
+ ret = sprintf(buf, "%d\n", val);
+ return ret;
+}
+
+static ssize_t gdlm_mounted_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ssize_t ret = len;
+ int val;
+
+ val = simple_strtol(buf, NULL, 0);
+
+ if (val == 1)
+ set_bit(DFL_JOIN_DONE, &ls->flags);
+ else if (val == 0)
+ set_bit(DFL_LEAVE_DONE, &ls->flags);
+ else if (val == -1) {
+ set_bit(DFL_TERMINATE, &ls->flags);
+ set_bit(DFL_JOIN_DONE, &ls->flags);
+ set_bit(DFL_LEAVE_DONE, &ls->flags);
+ } else
+ ret = -EINVAL;
+ wake_up(&ls->wait_control);
+ return ret;
+}
+
+static ssize_t gdlm_withdraw_show(struct gdlm_ls *ls, char *buf)
+{
+ ssize_t ret;
+ int val = 0;
+
+ if (test_bit(DFL_WITHDRAW, &ls->flags))
+ val = 1;
+ ret = sprintf(buf, "%d\n", val);
+ return ret;
+}
+
+static ssize_t gdlm_withdraw_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ssize_t ret = len;
+ int val;
+
+ val = simple_strtol(buf, NULL, 0);
+
+ if (val == 1)
+ set_bit(DFL_WITHDRAW, &ls->flags);
+ else
+ ret = -EINVAL;
+ wake_up(&ls->wait_control);
+ return ret;
+}
+
+static ssize_t gdlm_jid_show(struct gdlm_ls *ls, char *buf)
+{
+ return sprintf(buf, "%u\n", ls->jid);
+}
+
+static ssize_t gdlm_jid_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ls->jid = simple_strtol(buf, NULL, 0);
+ return len;
+}
+
+static ssize_t gdlm_first_show(struct gdlm_ls *ls, char *buf)
+{
+ return sprintf(buf, "%u\n", ls->first);
+}
+
+static ssize_t gdlm_first_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ls->first = simple_strtol(buf, NULL, 0);
+ return len;
+}
+
+static ssize_t gdlm_first_done_show(struct gdlm_ls *ls, char *buf)
+{
+ return sprintf(buf, "%d\n", ls->first_done);
+}
+
+static ssize_t gdlm_recover_show(struct gdlm_ls *ls, char *buf)
+{
+ return sprintf(buf, "%u\n", ls->recover_jid);
+}
+
+static ssize_t gdlm_recover_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ls->recover_jid = simple_strtol(buf, NULL, 0);
+ ls->fscb(ls->fsdata, LM_CB_NEED_RECOVERY, &ls->recover_jid);
+ return len;
+}
+
+static ssize_t gdlm_recover_done_show(struct gdlm_ls *ls, char *buf)
+{
+ ssize_t ret;
+ ret = sprintf(buf, "%d\n", ls->recover_done);
+ return ret;
+}
+
+static ssize_t gdlm_cluster_show(struct gdlm_ls *ls, char *buf)
+{
+ ssize_t ret;
+ ret = sprintf(buf, "%s\n", ls->clustername);
+ return ret;
+}
+
+static ssize_t gdlm_options_show(struct gdlm_ls *ls, char *buf)
+{
+ ssize_t ret = 0;
+
+ if (ls->fsflags & LM_MFLAG_SPECTATOR)
+ ret += sprintf(buf, "spectator ");
+
+ return ret;
+}
+
+struct gdlm_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct gdlm_ls *, char *);
+ ssize_t (*store)(struct gdlm_ls *, const char *, size_t);
+};
+
+static struct gdlm_attr gdlm_attr_block = {
+ .attr = {.name = "block", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_block_show,
+ .store = gdlm_block_store
+};
+
+static struct gdlm_attr gdlm_attr_mounted = {
+ .attr = {.name = "mounted", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_mounted_show,
+ .store = gdlm_mounted_store
+};
+
+static struct gdlm_attr gdlm_attr_withdraw = {
+ .attr = {.name = "withdraw", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_withdraw_show,
+ .store = gdlm_withdraw_store
+};
+
+static struct gdlm_attr gdlm_attr_jid = {
+ .attr = {.name = "jid", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_jid_show,
+ .store = gdlm_jid_store
+};
+
+static struct gdlm_attr gdlm_attr_first = {
+ .attr = {.name = "first", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_first_show,
+ .store = gdlm_first_store
+};
+
+static struct gdlm_attr gdlm_attr_first_done = {
+ .attr = {.name = "first_done", .mode = S_IRUGO},
+ .show = gdlm_first_done_show,
+};
+
+static struct gdlm_attr gdlm_attr_recover = {
+ .attr = {.name = "recover", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_recover_show,
+ .store = gdlm_recover_store
+};
+
+static struct gdlm_attr gdlm_attr_recover_done = {
+ .attr = {.name = "recover_done", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_recover_done_show,
+};
+
+static struct gdlm_attr gdlm_attr_cluster = {
+ .attr = {.name = "cluster", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_cluster_show,
+};
+
+static struct gdlm_attr gdlm_attr_options = {
+ .attr = {.name = "options", .mode = S_IRUGO | S_IWUSR},
+ .show = gdlm_options_show,
+};
+
+static struct attribute *gdlm_attrs[] = {
+ &gdlm_attr_block.attr,
+ &gdlm_attr_mounted.attr,
+ &gdlm_attr_withdraw.attr,
+ &gdlm_attr_jid.attr,
+ &gdlm_attr_first.attr,
+ &gdlm_attr_first_done.attr,
+ &gdlm_attr_recover.attr,
+ &gdlm_attr_recover_done.attr,
+ &gdlm_attr_cluster.attr,
+ &gdlm_attr_options.attr,
+ NULL,
+};
+
+static ssize_t gdlm_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
+ struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
+ return a->show ? a->show(ls, buf) : 0;
+}
+
+static ssize_t gdlm_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
+ struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
+ return a->store ? a->store(ls, buf, len) : len;
+}
+
+static struct sysfs_ops gdlm_attr_ops = {
+ .show = gdlm_attr_show,
+ .store = gdlm_attr_store,
+};
+
+static struct kobj_type gdlm_ktype = {
+ .default_attrs = gdlm_attrs,
+ .sysfs_ops = &gdlm_attr_ops,
+};
+
+static struct kset gdlm_kset = {
+ .subsys = &kernel_subsys,
+ .kobj = {.name = "lock_dlm",},
+ .ktype = &gdlm_ktype,
+};
+
+int gdlm_kobject_setup(struct gdlm_ls *ls)
+{
+ int error;
+
+ error = kobject_set_name(&ls->kobj, "%s", ls->fsname);
+ if (error)
+ return error;
+
+ ls->kobj.kset = &gdlm_kset;
+ ls->kobj.ktype = &gdlm_ktype;
+
+ error = kobject_register(&ls->kobj);
+
+ return 0;
+}
+
+void gdlm_kobject_release(struct gdlm_ls *ls)
+{
+ kobject_unregister(&ls->kobj);
+}
+
+int gdlm_sysfs_init(void)
+{
+ int error;
+
+ error = kset_register(&gdlm_kset);
+ if (error)
+ printk("lock_dlm: cannot register kset %d\n", error);
+
+ return error;
+}
+
+void gdlm_sysfs_exit(void)
+{
+ kset_unregister(&gdlm_kset);
+}
+