704 lines
14 KiB
C
704 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2014 Red Hat, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_sysfs.h"
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#include "xfs_log.h"
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#include "xfs_log_priv.h"
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#include "xfs_mount.h"
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struct xfs_sysfs_attr {
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struct attribute attr;
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ssize_t (*show)(struct kobject *kobject, char *buf);
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ssize_t (*store)(struct kobject *kobject, const char *buf,
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size_t count);
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};
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static inline struct xfs_sysfs_attr *
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to_attr(struct attribute *attr)
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{
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return container_of(attr, struct xfs_sysfs_attr, attr);
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}
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#define XFS_SYSFS_ATTR_RW(name) \
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static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
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#define XFS_SYSFS_ATTR_RO(name) \
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static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
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#define XFS_SYSFS_ATTR_WO(name) \
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static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name)
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#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
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STATIC ssize_t
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xfs_sysfs_object_show(
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struct kobject *kobject,
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struct attribute *attr,
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char *buf)
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{
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struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
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return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0;
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}
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STATIC ssize_t
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xfs_sysfs_object_store(
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struct kobject *kobject,
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struct attribute *attr,
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const char *buf,
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size_t count)
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{
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struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
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return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0;
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}
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static const struct sysfs_ops xfs_sysfs_ops = {
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.show = xfs_sysfs_object_show,
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.store = xfs_sysfs_object_store,
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};
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static struct attribute *xfs_mp_attrs[] = {
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NULL,
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};
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struct kobj_type xfs_mp_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_sysfs_ops,
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.default_attrs = xfs_mp_attrs,
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};
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#ifdef DEBUG
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/* debug */
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STATIC ssize_t
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bug_on_assert_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val == 1)
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xfs_globals.bug_on_assert = true;
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else if (val == 0)
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xfs_globals.bug_on_assert = false;
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else
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return -EINVAL;
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return count;
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}
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STATIC ssize_t
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bug_on_assert_show(
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struct kobject *kobject,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.bug_on_assert ? 1 : 0);
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}
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XFS_SYSFS_ATTR_RW(bug_on_assert);
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STATIC ssize_t
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log_recovery_delay_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val < 0 || val > 60)
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return -EINVAL;
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xfs_globals.log_recovery_delay = val;
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return count;
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}
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STATIC ssize_t
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log_recovery_delay_show(
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struct kobject *kobject,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.log_recovery_delay);
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}
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XFS_SYSFS_ATTR_RW(log_recovery_delay);
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STATIC ssize_t
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mount_delay_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val < 0 || val > 60)
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return -EINVAL;
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xfs_globals.mount_delay = val;
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return count;
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}
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STATIC ssize_t
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mount_delay_show(
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struct kobject *kobject,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.mount_delay);
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}
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XFS_SYSFS_ATTR_RW(mount_delay);
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static ssize_t
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always_cow_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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ssize_t ret;
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ret = kstrtobool(buf, &xfs_globals.always_cow);
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if (ret < 0)
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return ret;
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return count;
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}
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static ssize_t
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always_cow_show(
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struct kobject *kobject,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.always_cow);
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}
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XFS_SYSFS_ATTR_RW(always_cow);
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#ifdef DEBUG
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/*
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* Override how many threads the parallel work queue is allowed to create.
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* This has to be a debug-only global (instead of an errortag) because one of
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* the main users of parallel workqueues is mount time quotacheck.
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*/
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STATIC ssize_t
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pwork_threads_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val < -1 || val > num_possible_cpus())
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return -EINVAL;
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xfs_globals.pwork_threads = val;
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return count;
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}
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STATIC ssize_t
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pwork_threads_show(
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struct kobject *kobject,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.pwork_threads);
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}
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XFS_SYSFS_ATTR_RW(pwork_threads);
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#endif /* DEBUG */
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static struct attribute *xfs_dbg_attrs[] = {
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ATTR_LIST(bug_on_assert),
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ATTR_LIST(log_recovery_delay),
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ATTR_LIST(mount_delay),
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ATTR_LIST(always_cow),
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#ifdef DEBUG
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ATTR_LIST(pwork_threads),
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#endif
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NULL,
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};
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struct kobj_type xfs_dbg_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_sysfs_ops,
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.default_attrs = xfs_dbg_attrs,
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};
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#endif /* DEBUG */
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/* stats */
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static inline struct xstats *
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to_xstats(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xstats, xs_kobj);
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}
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STATIC ssize_t
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stats_show(
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struct kobject *kobject,
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char *buf)
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{
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struct xstats *stats = to_xstats(kobject);
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return xfs_stats_format(stats->xs_stats, buf);
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}
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XFS_SYSFS_ATTR_RO(stats);
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STATIC ssize_t
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stats_clear_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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int ret;
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int val;
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struct xstats *stats = to_xstats(kobject);
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val != 1)
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return -EINVAL;
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xfs_stats_clearall(stats->xs_stats);
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return count;
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}
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XFS_SYSFS_ATTR_WO(stats_clear);
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static struct attribute *xfs_stats_attrs[] = {
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ATTR_LIST(stats),
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ATTR_LIST(stats_clear),
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NULL,
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};
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struct kobj_type xfs_stats_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_sysfs_ops,
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.default_attrs = xfs_stats_attrs,
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};
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/* xlog */
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static inline struct xlog *
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to_xlog(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xlog, l_kobj);
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}
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STATIC ssize_t
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log_head_lsn_show(
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struct kobject *kobject,
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char *buf)
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{
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int cycle;
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int block;
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struct xlog *log = to_xlog(kobject);
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spin_lock(&log->l_icloglock);
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cycle = log->l_curr_cycle;
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block = log->l_curr_block;
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spin_unlock(&log->l_icloglock);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
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}
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XFS_SYSFS_ATTR_RO(log_head_lsn);
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STATIC ssize_t
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log_tail_lsn_show(
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struct kobject *kobject,
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char *buf)
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{
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int cycle;
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int block;
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struct xlog *log = to_xlog(kobject);
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xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
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}
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XFS_SYSFS_ATTR_RO(log_tail_lsn);
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STATIC ssize_t
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reserve_grant_head_show(
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struct kobject *kobject,
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char *buf)
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{
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int cycle;
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int bytes;
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struct xlog *log = to_xlog(kobject);
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xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
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}
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XFS_SYSFS_ATTR_RO(reserve_grant_head);
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STATIC ssize_t
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write_grant_head_show(
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struct kobject *kobject,
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char *buf)
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{
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int cycle;
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int bytes;
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struct xlog *log = to_xlog(kobject);
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xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
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return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
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}
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XFS_SYSFS_ATTR_RO(write_grant_head);
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static struct attribute *xfs_log_attrs[] = {
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ATTR_LIST(log_head_lsn),
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ATTR_LIST(log_tail_lsn),
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ATTR_LIST(reserve_grant_head),
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ATTR_LIST(write_grant_head),
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NULL,
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};
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struct kobj_type xfs_log_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_sysfs_ops,
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.default_attrs = xfs_log_attrs,
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};
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/*
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* Metadata IO error configuration
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*
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* The sysfs structure here is:
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* ...xfs/<dev>/error/<class>/<errno>/<error_attrs>
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*
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* where <class> allows us to discriminate between data IO and metadata IO,
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* and any other future type of IO (e.g. special inode or directory error
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* handling) we care to support.
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*/
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static inline struct xfs_error_cfg *
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to_error_cfg(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xfs_error_cfg, kobj);
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}
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static inline struct xfs_mount *
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err_to_mp(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xfs_mount, m_error_kobj);
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}
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static ssize_t
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max_retries_show(
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struct kobject *kobject,
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char *buf)
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{
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int retries;
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struct xfs_error_cfg *cfg = to_error_cfg(kobject);
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if (cfg->max_retries == XFS_ERR_RETRY_FOREVER)
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retries = -1;
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else
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retries = cfg->max_retries;
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return snprintf(buf, PAGE_SIZE, "%d\n", retries);
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}
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static ssize_t
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max_retries_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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struct xfs_error_cfg *cfg = to_error_cfg(kobject);
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val < -1)
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return -EINVAL;
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if (val == -1)
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cfg->max_retries = XFS_ERR_RETRY_FOREVER;
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else
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cfg->max_retries = val;
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return count;
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}
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XFS_SYSFS_ATTR_RW(max_retries);
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static ssize_t
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retry_timeout_seconds_show(
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struct kobject *kobject,
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char *buf)
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{
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int timeout;
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struct xfs_error_cfg *cfg = to_error_cfg(kobject);
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if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER)
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timeout = -1;
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else
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timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC;
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return snprintf(buf, PAGE_SIZE, "%d\n", timeout);
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}
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static ssize_t
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retry_timeout_seconds_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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struct xfs_error_cfg *cfg = to_error_cfg(kobject);
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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/* 1 day timeout maximum, -1 means infinite */
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if (val < -1 || val > 86400)
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return -EINVAL;
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if (val == -1)
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cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
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else {
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cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC);
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ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX);
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}
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return count;
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}
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XFS_SYSFS_ATTR_RW(retry_timeout_seconds);
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static ssize_t
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fail_at_unmount_show(
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struct kobject *kobject,
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char *buf)
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{
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struct xfs_mount *mp = err_to_mp(kobject);
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return snprintf(buf, PAGE_SIZE, "%d\n", mp->m_fail_unmount);
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}
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static ssize_t
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fail_at_unmount_store(
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struct kobject *kobject,
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const char *buf,
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size_t count)
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{
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struct xfs_mount *mp = err_to_mp(kobject);
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int ret;
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int val;
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ret = kstrtoint(buf, 0, &val);
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if (ret)
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return ret;
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if (val < 0 || val > 1)
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return -EINVAL;
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mp->m_fail_unmount = val;
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return count;
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}
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XFS_SYSFS_ATTR_RW(fail_at_unmount);
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static struct attribute *xfs_error_attrs[] = {
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ATTR_LIST(max_retries),
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ATTR_LIST(retry_timeout_seconds),
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NULL,
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};
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static struct kobj_type xfs_error_cfg_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_sysfs_ops,
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.default_attrs = xfs_error_attrs,
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};
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static struct kobj_type xfs_error_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_sysfs_ops,
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};
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/*
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* Error initialization tables. These need to be ordered in the same
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* order as the enums used to index the array. All class init tables need to
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* define a "default" behaviour as the first entry, all other entries can be
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* empty.
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*/
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struct xfs_error_init {
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char *name;
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int max_retries;
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int retry_timeout; /* in seconds */
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};
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static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = {
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{ .name = "default",
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.max_retries = XFS_ERR_RETRY_FOREVER,
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.retry_timeout = XFS_ERR_RETRY_FOREVER,
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},
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{ .name = "EIO",
|
|
.max_retries = XFS_ERR_RETRY_FOREVER,
|
|
.retry_timeout = XFS_ERR_RETRY_FOREVER,
|
|
},
|
|
{ .name = "ENOSPC",
|
|
.max_retries = XFS_ERR_RETRY_FOREVER,
|
|
.retry_timeout = XFS_ERR_RETRY_FOREVER,
|
|
},
|
|
{ .name = "ENODEV",
|
|
.max_retries = 0, /* We can't recover from devices disappearing */
|
|
.retry_timeout = 0,
|
|
},
|
|
};
|
|
|
|
static int
|
|
xfs_error_sysfs_init_class(
|
|
struct xfs_mount *mp,
|
|
int class,
|
|
const char *parent_name,
|
|
struct xfs_kobj *parent_kobj,
|
|
const struct xfs_error_init init[])
|
|
{
|
|
struct xfs_error_cfg *cfg;
|
|
int error;
|
|
int i;
|
|
|
|
ASSERT(class < XFS_ERR_CLASS_MAX);
|
|
|
|
error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype,
|
|
&mp->m_error_kobj, parent_name);
|
|
if (error)
|
|
return error;
|
|
|
|
for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) {
|
|
cfg = &mp->m_error_cfg[class][i];
|
|
error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype,
|
|
parent_kobj, init[i].name);
|
|
if (error)
|
|
goto out_error;
|
|
|
|
cfg->max_retries = init[i].max_retries;
|
|
if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER)
|
|
cfg->retry_timeout = XFS_ERR_RETRY_FOREVER;
|
|
else
|
|
cfg->retry_timeout = msecs_to_jiffies(
|
|
init[i].retry_timeout * MSEC_PER_SEC);
|
|
}
|
|
return 0;
|
|
|
|
out_error:
|
|
/* unwind the entries that succeeded */
|
|
for (i--; i >= 0; i--) {
|
|
cfg = &mp->m_error_cfg[class][i];
|
|
xfs_sysfs_del(&cfg->kobj);
|
|
}
|
|
xfs_sysfs_del(parent_kobj);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_error_sysfs_init(
|
|
struct xfs_mount *mp)
|
|
{
|
|
int error;
|
|
|
|
/* .../xfs/<dev>/error/ */
|
|
error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype,
|
|
&mp->m_kobj, "error");
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysfs_create_file(&mp->m_error_kobj.kobject,
|
|
ATTR_LIST(fail_at_unmount));
|
|
|
|
if (error)
|
|
goto out_error;
|
|
|
|
/* .../xfs/<dev>/error/metadata/ */
|
|
error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA,
|
|
"metadata", &mp->m_error_meta_kobj,
|
|
xfs_error_meta_init);
|
|
if (error)
|
|
goto out_error;
|
|
|
|
return 0;
|
|
|
|
out_error:
|
|
xfs_sysfs_del(&mp->m_error_kobj);
|
|
return error;
|
|
}
|
|
|
|
void
|
|
xfs_error_sysfs_del(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_error_cfg *cfg;
|
|
int i, j;
|
|
|
|
for (i = 0; i < XFS_ERR_CLASS_MAX; i++) {
|
|
for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) {
|
|
cfg = &mp->m_error_cfg[i][j];
|
|
|
|
xfs_sysfs_del(&cfg->kobj);
|
|
}
|
|
}
|
|
xfs_sysfs_del(&mp->m_error_meta_kobj);
|
|
xfs_sysfs_del(&mp->m_error_kobj);
|
|
}
|
|
|
|
struct xfs_error_cfg *
|
|
xfs_error_get_cfg(
|
|
struct xfs_mount *mp,
|
|
int error_class,
|
|
int error)
|
|
{
|
|
struct xfs_error_cfg *cfg;
|
|
|
|
if (error < 0)
|
|
error = -error;
|
|
|
|
switch (error) {
|
|
case EIO:
|
|
cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO];
|
|
break;
|
|
case ENOSPC:
|
|
cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC];
|
|
break;
|
|
case ENODEV:
|
|
cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV];
|
|
break;
|
|
default:
|
|
cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT];
|
|
break;
|
|
}
|
|
|
|
return cfg;
|
|
}
|