b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 3 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 4 | * |
| 5 | * Copyright (C) 2004, 2005 Oracle. All rights reserved. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/proc_fs.h> |
| 11 | #include <linux/seq_file.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/uaccess.h> |
| 14 | |
| 15 | #include "masklog.h" |
| 16 | |
| 17 | struct mlog_bits mlog_and_bits = MLOG_BITS_RHS(MLOG_INITIAL_AND_MASK); |
| 18 | EXPORT_SYMBOL_GPL(mlog_and_bits); |
| 19 | struct mlog_bits mlog_not_bits = MLOG_BITS_RHS(0); |
| 20 | EXPORT_SYMBOL_GPL(mlog_not_bits); |
| 21 | |
| 22 | static ssize_t mlog_mask_show(u64 mask, char *buf) |
| 23 | { |
| 24 | char *state; |
| 25 | |
| 26 | if (__mlog_test_u64(mask, mlog_and_bits)) |
| 27 | state = "allow"; |
| 28 | else if (__mlog_test_u64(mask, mlog_not_bits)) |
| 29 | state = "deny"; |
| 30 | else |
| 31 | state = "off"; |
| 32 | |
| 33 | return snprintf(buf, PAGE_SIZE, "%s\n", state); |
| 34 | } |
| 35 | |
| 36 | static ssize_t mlog_mask_store(u64 mask, const char *buf, size_t count) |
| 37 | { |
| 38 | if (!strncasecmp(buf, "allow", 5)) { |
| 39 | __mlog_set_u64(mask, mlog_and_bits); |
| 40 | __mlog_clear_u64(mask, mlog_not_bits); |
| 41 | } else if (!strncasecmp(buf, "deny", 4)) { |
| 42 | __mlog_set_u64(mask, mlog_not_bits); |
| 43 | __mlog_clear_u64(mask, mlog_and_bits); |
| 44 | } else if (!strncasecmp(buf, "off", 3)) { |
| 45 | __mlog_clear_u64(mask, mlog_not_bits); |
| 46 | __mlog_clear_u64(mask, mlog_and_bits); |
| 47 | } else |
| 48 | return -EINVAL; |
| 49 | |
| 50 | return count; |
| 51 | } |
| 52 | |
| 53 | void __mlog_printk(const u64 *mask, const char *func, int line, |
| 54 | const char *fmt, ...) |
| 55 | { |
| 56 | struct va_format vaf; |
| 57 | va_list args; |
| 58 | const char *level; |
| 59 | const char *prefix = ""; |
| 60 | |
| 61 | if (!__mlog_test_u64(*mask, mlog_and_bits) || |
| 62 | __mlog_test_u64(*mask, mlog_not_bits)) |
| 63 | return; |
| 64 | |
| 65 | if (*mask & ML_ERROR) { |
| 66 | level = KERN_ERR; |
| 67 | prefix = "ERROR: "; |
| 68 | } else if (*mask & ML_NOTICE) { |
| 69 | level = KERN_NOTICE; |
| 70 | } else { |
| 71 | level = KERN_INFO; |
| 72 | } |
| 73 | |
| 74 | va_start(args, fmt); |
| 75 | |
| 76 | vaf.fmt = fmt; |
| 77 | vaf.va = &args; |
| 78 | |
| 79 | printk("%s(%s,%u,%u):%s:%d %s%pV", |
| 80 | level, current->comm, task_pid_nr(current), |
| 81 | raw_smp_processor_id(), func, line, prefix, &vaf); |
| 82 | |
| 83 | va_end(args); |
| 84 | } |
| 85 | EXPORT_SYMBOL_GPL(__mlog_printk); |
| 86 | |
| 87 | struct mlog_attribute { |
| 88 | struct attribute attr; |
| 89 | u64 mask; |
| 90 | }; |
| 91 | |
| 92 | #define to_mlog_attr(_attr) container_of(_attr, struct mlog_attribute, attr) |
| 93 | |
| 94 | #define define_mask(_name) { \ |
| 95 | .attr = { \ |
| 96 | .name = #_name, \ |
| 97 | .mode = S_IRUGO | S_IWUSR, \ |
| 98 | }, \ |
| 99 | .mask = ML_##_name, \ |
| 100 | } |
| 101 | |
| 102 | static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = { |
| 103 | define_mask(TCP), |
| 104 | define_mask(MSG), |
| 105 | define_mask(SOCKET), |
| 106 | define_mask(HEARTBEAT), |
| 107 | define_mask(HB_BIO), |
| 108 | define_mask(DLMFS), |
| 109 | define_mask(DLM), |
| 110 | define_mask(DLM_DOMAIN), |
| 111 | define_mask(DLM_THREAD), |
| 112 | define_mask(DLM_MASTER), |
| 113 | define_mask(DLM_RECOVERY), |
| 114 | define_mask(DLM_GLUE), |
| 115 | define_mask(VOTE), |
| 116 | define_mask(CONN), |
| 117 | define_mask(QUORUM), |
| 118 | define_mask(BASTS), |
| 119 | define_mask(CLUSTER), |
| 120 | define_mask(ERROR), |
| 121 | define_mask(NOTICE), |
| 122 | define_mask(KTHREAD), |
| 123 | }; |
| 124 | |
| 125 | static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, }; |
| 126 | |
| 127 | static ssize_t mlog_show(struct kobject *obj, struct attribute *attr, |
| 128 | char *buf) |
| 129 | { |
| 130 | struct mlog_attribute *mlog_attr = to_mlog_attr(attr); |
| 131 | |
| 132 | return mlog_mask_show(mlog_attr->mask, buf); |
| 133 | } |
| 134 | |
| 135 | static ssize_t mlog_store(struct kobject *obj, struct attribute *attr, |
| 136 | const char *buf, size_t count) |
| 137 | { |
| 138 | struct mlog_attribute *mlog_attr = to_mlog_attr(attr); |
| 139 | |
| 140 | return mlog_mask_store(mlog_attr->mask, buf, count); |
| 141 | } |
| 142 | |
| 143 | static const struct sysfs_ops mlog_attr_ops = { |
| 144 | .show = mlog_show, |
| 145 | .store = mlog_store, |
| 146 | }; |
| 147 | |
| 148 | static struct kobj_type mlog_ktype = { |
| 149 | .default_attrs = mlog_attr_ptrs, |
| 150 | .sysfs_ops = &mlog_attr_ops, |
| 151 | }; |
| 152 | |
| 153 | static struct kset mlog_kset = { |
| 154 | .kobj = {.ktype = &mlog_ktype}, |
| 155 | }; |
| 156 | |
| 157 | int mlog_sys_init(struct kset *o2cb_kset) |
| 158 | { |
| 159 | int i = 0; |
| 160 | |
| 161 | while (mlog_attrs[i].attr.mode) { |
| 162 | mlog_attr_ptrs[i] = &mlog_attrs[i].attr; |
| 163 | i++; |
| 164 | } |
| 165 | mlog_attr_ptrs[i] = NULL; |
| 166 | |
| 167 | kobject_set_name(&mlog_kset.kobj, "logmask"); |
| 168 | mlog_kset.kobj.kset = o2cb_kset; |
| 169 | return kset_register(&mlog_kset); |
| 170 | } |
| 171 | |
| 172 | void mlog_sys_shutdown(void) |
| 173 | { |
| 174 | kset_unregister(&mlog_kset); |
| 175 | } |