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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | /* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * sys.c * * OCFS2 cluster sysfs interface * * Copyright (C) 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, * version 2 of the License. * * 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/kernel.h> #include <linux/module.h> #include <linux/kobject.h> #include <linux/sysfs.h> #include "ocfs2_nodemanager.h" #include "masklog.h" #include "sys.h" struct o2cb_attribute { struct attribute attr; ssize_t (*show)(char *buf); ssize_t (*store)(const char *buf, size_t count); }; #define O2CB_ATTR(_name, _mode, _show, _store) \ struct o2cb_attribute o2cb_attr_##_name = __ATTR(_name, _mode, _show, _store) #define to_o2cb_attr(_attr) container_of(_attr, struct o2cb_attribute, attr) static ssize_t o2cb_interface_revision_show(char *buf) { return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION); } static O2CB_ATTR(interface_revision, S_IFREG | S_IRUGO, o2cb_interface_revision_show, NULL); static struct attribute *o2cb_attrs[] = { &o2cb_attr_interface_revision.attr, NULL, }; static ssize_t o2cb_show(struct kobject * kobj, struct attribute * attr, char * buffer); static ssize_t o2cb_store(struct kobject * kobj, struct attribute * attr, const char * buffer, size_t count); static struct sysfs_ops o2cb_sysfs_ops = { .show = o2cb_show, .store = o2cb_store, }; static struct kobj_type o2cb_subsys_type = { .default_attrs = o2cb_attrs, .sysfs_ops = &o2cb_sysfs_ops, }; /* gives us o2cb_subsys */ static decl_subsys(o2cb, NULL, NULL); static ssize_t o2cb_show(struct kobject * kobj, struct attribute * attr, char * buffer) { struct o2cb_attribute *o2cb_attr = to_o2cb_attr(attr); struct kset *sbs = to_kset(kobj); BUG_ON(sbs != &o2cb_subsys); if (o2cb_attr->show) return o2cb_attr->show(buffer); return -EIO; } static ssize_t o2cb_store(struct kobject * kobj, struct attribute * attr, const char * buffer, size_t count) { struct o2cb_attribute *o2cb_attr = to_o2cb_attr(attr); struct kset *sbs = to_kset(kobj); BUG_ON(sbs != &o2cb_subsys); if (o2cb_attr->store) return o2cb_attr->store(buffer, count); return -EIO; } void o2cb_sys_shutdown(void) { mlog_sys_shutdown(); subsystem_unregister(&o2cb_subsys); } int o2cb_sys_init(void) { int ret; o2cb_subsys.kobj.ktype = &o2cb_subsys_type; ret = subsystem_register(&o2cb_subsys); if (ret) return ret; ret = mlog_sys_init(&o2cb_subsys); if (ret) subsystem_unregister(&o2cb_subsys); return ret; } |