1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * Copyright (C) 2004, 2005 Oracle. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public 17 * License along with this program; if not, write to the 18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 19 * Boston, MA 021110-1307, USA. 20 */ 21 22 #include <linux/module.h> 23 #include <linux/kernel.h> 24 #include <linux/proc_fs.h> 25 #include <linux/seq_file.h> 26 #include <linux/string.h> 27 #include <linux/uaccess.h> 28 29 #include "masklog.h" 30 31 struct mlog_bits mlog_and_bits = MLOG_BITS_RHS(MLOG_INITIAL_AND_MASK); 32 EXPORT_SYMBOL_GPL(mlog_and_bits); 33 struct mlog_bits mlog_not_bits = MLOG_BITS_RHS(0); 34 EXPORT_SYMBOL_GPL(mlog_not_bits); 35 36 static ssize_t mlog_mask_show(u64 mask, char *buf) 37 { 38 char *state; 39 40 if (__mlog_test_u64(mask, mlog_and_bits)) 41 state = "allow"; 42 else if (__mlog_test_u64(mask, mlog_not_bits)) 43 state = "deny"; 44 else 45 state = "off"; 46 47 return snprintf(buf, PAGE_SIZE, "%s\n", state); 48 } 49 50 static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count) 51 { 52 if (!strncasecmp(buf, "allow", 5)) { 53 __mlog_set_u64(mask, mlog_and_bits); 54 __mlog_clear_u64(mask, mlog_not_bits); 55 } else if (!strncasecmp(buf, "deny", 4)) { 56 __mlog_set_u64(mask, mlog_not_bits); 57 __mlog_clear_u64(mask, mlog_and_bits); 58 } else if (!strncasecmp(buf, "off", 3)) { 59 __mlog_clear_u64(mask, mlog_not_bits); 60 __mlog_clear_u64(mask, mlog_and_bits); 61 } else 62 return -EINVAL; 63 64 return count; 65 } 66 67 void __mlog_printk(const u64 *mask, const char *func, int line, 68 const char *fmt, ...) 69 { 70 struct va_format vaf; 71 va_list args; 72 const char *level; 73 const char *prefix = ""; 74 75 if (!__mlog_test_u64(*mask, mlog_and_bits) || 76 __mlog_test_u64(*mask, mlog_not_bits)) 77 return; 78 79 if (*mask & ML_ERROR) { 80 level = KERN_ERR; 81 prefix = "ERROR: "; 82 } else if (*mask & ML_NOTICE) { 83 level = KERN_NOTICE; 84 } else { 85 level = KERN_INFO; 86 } 87 88 va_start(args, fmt); 89 90 vaf.fmt = fmt; 91 vaf.va = &args; 92 93 printk("%s(%s,%u,%u):%s:%d %s%pV", 94 level, current->comm, task_pid_nr(current), 95 raw_smp_processor_id(), func, line, prefix, &vaf); 96 97 va_end(args); 98 } 99 EXPORT_SYMBOL_GPL(__mlog_printk); 100 101 struct mlog_attribute { 102 struct attribute attr; 103 u64 mask; 104 }; 105 106 #define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr) 107 108 #define define_mask(_name) { \ 109 .attr = { \ 110 .name = #_name, \ 111 .mode = S_IRUGO | S_IWUSR, \ 112 }, \ 113 .mask = ML_##_name, \ 114 } 115 116 static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = { 117 define_mask(TCP), 118 define_mask(MSG), 119 define_mask(SOCKET), 120 define_mask(HEARTBEAT), 121 define_mask(HB_BIO), 122 define_mask(DLMFS), 123 define_mask(DLM), 124 define_mask(DLM_DOMAIN), 125 define_mask(DLM_THREAD), 126 define_mask(DLM_MASTER), 127 define_mask(DLM_RECOVERY), 128 define_mask(DLM_GLUE), 129 define_mask(VOTE), 130 define_mask(CONN), 131 define_mask(QUORUM), 132 define_mask(BASTS), 133 define_mask(CLUSTER), 134 define_mask(ERROR), 135 define_mask(NOTICE), 136 define_mask(KTHREAD), 137 }; 138 139 static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, }; 140 141 static ssize_t mlog_show(struct kobject *obj, struct attribute *attr, 142 char *buf) 143 { 144 struct mlog_attribute *mlog_attr = to_mlog_attr(attr); 145 146 return mlog_mask_show(mlog_attr->mask, buf); 147 } 148 149 static ssize_t mlog_store(struct kobject *obj, struct attribute *attr, 150 const char *buf, size_t count) 151 { 152 struct mlog_attribute *mlog_attr = to_mlog_attr(attr); 153 154 return mlog_mask_store(mlog_attr->mask, buf, count); 155 } 156 157 static const struct sysfs_ops mlog_attr_ops = { 158 .show = mlog_show, 159 .store = mlog_store, 160 }; 161 162 static struct kobj_type mlog_ktype = { 163 .default_attrs = mlog_attr_ptrs, 164 .sysfs_ops = &mlog_attr_ops, 165 }; 166 167 static struct kset mlog_kset = { 168 .kobj = {.ktype = &mlog_ktype}, 169 }; 170 171 int mlog_sys_init(struct kset *o2cb_kset) 172 { 173 int i = 0; 174 175 while (mlog_attrs[i].attr.mode) { 176 mlog_attr_ptrs[i] = &mlog_attrs[i].attr; 177 i++; 178 } 179 mlog_attr_ptrs[i] = NULL; 180 181 kobject_set_name(&mlog_kset.kobj, "logmask"); 182 mlog_kset.kobj.kset = o2cb_kset; 183 return kset_register(&mlog_kset); 184 } 185 186 void mlog_sys_shutdown(void) 187 { 188 kset_unregister(&mlog_kset); 189 } 190