diff options
Diffstat (limited to 'fs/ocfs2/cluster/masklog.c')
| -rw-r--r-- | fs/ocfs2/cluster/masklog.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c new file mode 100644 index 0000000000..563881ddbf --- /dev/null +++ b/fs/ocfs2/cluster/masklog.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2004, 2005 Oracle. All rights reserved. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/string.h> +#include <linux/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; +} + +void __mlog_printk(const u64 *mask, const char *func, int line, + const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + const char *level; + const char *prefix = ""; + + if (!__mlog_test_u64(*mask, mlog_and_bits) || + __mlog_test_u64(*mask, mlog_not_bits)) + return; + + if (*mask & ML_ERROR) { + level = KERN_ERR; + prefix = "ERROR: "; + } else if (*mask & ML_NOTICE) { + level = KERN_NOTICE; + } else { + level = KERN_INFO; + } + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + printk("%s(%s,%u,%u):%s:%d %s%pV", + level, current->comm, task_pid_nr(current), + raw_smp_processor_id(), func, line, prefix, &vaf); + + va_end(args); +} +EXPORT_SYMBOL_GPL(__mlog_printk); + +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_default_attrs[MLOG_MAX_BITS] = {NULL, }; +ATTRIBUTE_GROUPS(mlog_default); + +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_groups = mlog_default_groups, + .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_default_attrs[i] = &mlog_attrs[i].attr; + i++; + } + mlog_default_attrs[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); +} |