607 lines
14 KiB
C
607 lines
14 KiB
C
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/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* filecheck.c
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*
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* Code which implements online file check.
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*
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* Copyright (C) 2016 SuSE. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/kmod.h>
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#include <linux/fs.h>
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#include <linux/kobject.h>
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#include <linux/sysfs.h>
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#include <linux/sysctl.h>
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "ocfs2_fs.h"
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#include "stackglue.h"
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#include "inode.h"
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#include "filecheck.h"
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/* File check error strings,
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* must correspond with error number in header file.
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*/
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static const char * const ocfs2_filecheck_errs[] = {
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"SUCCESS",
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"FAILED",
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"INPROGRESS",
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"READONLY",
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"INJBD",
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"INVALIDINO",
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"BLOCKECC",
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"BLOCKNO",
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"VALIDFLAG",
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"GENERATION",
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"UNSUPPORTED"
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};
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static DEFINE_SPINLOCK(ocfs2_filecheck_sysfs_lock);
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static LIST_HEAD(ocfs2_filecheck_sysfs_list);
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struct ocfs2_filecheck {
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struct list_head fc_head; /* File check entry list head */
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spinlock_t fc_lock;
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unsigned int fc_max; /* Maximum number of entry in list */
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unsigned int fc_size; /* Current entry count in list */
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unsigned int fc_done; /* Finished entry count in list */
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};
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struct ocfs2_filecheck_sysfs_entry { /* sysfs entry per mounting */
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struct list_head fs_list;
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atomic_t fs_count;
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struct super_block *fs_sb;
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struct kset *fs_devicekset;
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struct kset *fs_fcheckkset;
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struct ocfs2_filecheck *fs_fcheck;
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};
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#define OCFS2_FILECHECK_MAXSIZE 100
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#define OCFS2_FILECHECK_MINSIZE 10
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/* File check operation type */
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enum {
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OCFS2_FILECHECK_TYPE_CHK = 0, /* Check a file(inode) */
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OCFS2_FILECHECK_TYPE_FIX, /* Fix a file(inode) */
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OCFS2_FILECHECK_TYPE_SET = 100 /* Set entry list maximum size */
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};
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struct ocfs2_filecheck_entry {
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struct list_head fe_list;
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unsigned long fe_ino;
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unsigned int fe_type;
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unsigned int fe_done:1;
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unsigned int fe_status:31;
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};
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struct ocfs2_filecheck_args {
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unsigned int fa_type;
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union {
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unsigned long fa_ino;
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unsigned int fa_len;
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};
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};
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static const char *
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ocfs2_filecheck_error(int errno)
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{
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if (!errno)
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return ocfs2_filecheck_errs[errno];
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BUG_ON(errno < OCFS2_FILECHECK_ERR_START ||
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errno > OCFS2_FILECHECK_ERR_END);
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return ocfs2_filecheck_errs[errno - OCFS2_FILECHECK_ERR_START + 1];
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}
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static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *buf);
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static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
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struct kobj_attribute *attr,
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const char *buf, size_t count);
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static struct kobj_attribute ocfs2_attr_filecheck_chk =
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__ATTR(check, S_IRUSR | S_IWUSR,
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ocfs2_filecheck_show,
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ocfs2_filecheck_store);
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static struct kobj_attribute ocfs2_attr_filecheck_fix =
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__ATTR(fix, S_IRUSR | S_IWUSR,
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ocfs2_filecheck_show,
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ocfs2_filecheck_store);
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static struct kobj_attribute ocfs2_attr_filecheck_set =
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__ATTR(set, S_IRUSR | S_IWUSR,
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ocfs2_filecheck_show,
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ocfs2_filecheck_store);
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static int ocfs2_filecheck_sysfs_wait(atomic_t *p)
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{
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schedule();
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return 0;
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}
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static void
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ocfs2_filecheck_sysfs_free(struct ocfs2_filecheck_sysfs_entry *entry)
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{
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struct ocfs2_filecheck_entry *p;
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if (!atomic_dec_and_test(&entry->fs_count))
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wait_on_atomic_t(&entry->fs_count, ocfs2_filecheck_sysfs_wait,
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TASK_UNINTERRUPTIBLE);
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spin_lock(&entry->fs_fcheck->fc_lock);
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while (!list_empty(&entry->fs_fcheck->fc_head)) {
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p = list_first_entry(&entry->fs_fcheck->fc_head,
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struct ocfs2_filecheck_entry, fe_list);
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list_del(&p->fe_list);
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BUG_ON(!p->fe_done); /* To free a undone file check entry */
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kfree(p);
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}
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spin_unlock(&entry->fs_fcheck->fc_lock);
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kset_unregister(entry->fs_fcheckkset);
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kset_unregister(entry->fs_devicekset);
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kfree(entry->fs_fcheck);
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kfree(entry);
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}
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static void
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ocfs2_filecheck_sysfs_add(struct ocfs2_filecheck_sysfs_entry *entry)
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{
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spin_lock(&ocfs2_filecheck_sysfs_lock);
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list_add_tail(&entry->fs_list, &ocfs2_filecheck_sysfs_list);
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spin_unlock(&ocfs2_filecheck_sysfs_lock);
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}
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static int ocfs2_filecheck_sysfs_del(const char *devname)
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{
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struct ocfs2_filecheck_sysfs_entry *p;
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spin_lock(&ocfs2_filecheck_sysfs_lock);
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list_for_each_entry(p, &ocfs2_filecheck_sysfs_list, fs_list) {
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if (!strcmp(p->fs_sb->s_id, devname)) {
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list_del(&p->fs_list);
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spin_unlock(&ocfs2_filecheck_sysfs_lock);
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ocfs2_filecheck_sysfs_free(p);
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return 0;
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}
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}
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spin_unlock(&ocfs2_filecheck_sysfs_lock);
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return 1;
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}
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static void
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ocfs2_filecheck_sysfs_put(struct ocfs2_filecheck_sysfs_entry *entry)
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{
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if (atomic_dec_and_test(&entry->fs_count))
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wake_up_atomic_t(&entry->fs_count);
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}
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static struct ocfs2_filecheck_sysfs_entry *
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ocfs2_filecheck_sysfs_get(const char *devname)
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{
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struct ocfs2_filecheck_sysfs_entry *p = NULL;
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spin_lock(&ocfs2_filecheck_sysfs_lock);
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list_for_each_entry(p, &ocfs2_filecheck_sysfs_list, fs_list) {
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if (!strcmp(p->fs_sb->s_id, devname)) {
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atomic_inc(&p->fs_count);
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spin_unlock(&ocfs2_filecheck_sysfs_lock);
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return p;
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}
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}
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spin_unlock(&ocfs2_filecheck_sysfs_lock);
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return NULL;
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}
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int ocfs2_filecheck_create_sysfs(struct super_block *sb)
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{
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int ret = 0;
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struct kset *device_kset = NULL;
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struct kset *fcheck_kset = NULL;
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struct ocfs2_filecheck *fcheck = NULL;
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struct ocfs2_filecheck_sysfs_entry *entry = NULL;
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struct attribute **attrs = NULL;
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struct attribute_group attrgp;
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if (!ocfs2_kset)
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return -ENOMEM;
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attrs = kmalloc(sizeof(struct attribute *) * 4, GFP_NOFS);
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if (!attrs) {
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ret = -ENOMEM;
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goto error;
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} else {
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attrs[0] = &ocfs2_attr_filecheck_chk.attr;
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attrs[1] = &ocfs2_attr_filecheck_fix.attr;
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attrs[2] = &ocfs2_attr_filecheck_set.attr;
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attrs[3] = NULL;
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memset(&attrgp, 0, sizeof(attrgp));
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attrgp.attrs = attrs;
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}
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fcheck = kmalloc(sizeof(struct ocfs2_filecheck), GFP_NOFS);
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if (!fcheck) {
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ret = -ENOMEM;
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goto error;
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} else {
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INIT_LIST_HEAD(&fcheck->fc_head);
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spin_lock_init(&fcheck->fc_lock);
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fcheck->fc_max = OCFS2_FILECHECK_MINSIZE;
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fcheck->fc_size = 0;
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fcheck->fc_done = 0;
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}
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if (strlen(sb->s_id) <= 0) {
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mlog(ML_ERROR,
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"Cannot get device basename when create filecheck sysfs\n");
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ret = -ENODEV;
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goto error;
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}
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device_kset = kset_create_and_add(sb->s_id, NULL, &ocfs2_kset->kobj);
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if (!device_kset) {
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ret = -ENOMEM;
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goto error;
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}
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fcheck_kset = kset_create_and_add("filecheck", NULL,
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&device_kset->kobj);
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if (!fcheck_kset) {
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ret = -ENOMEM;
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goto error;
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}
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ret = sysfs_create_group(&fcheck_kset->kobj, &attrgp);
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if (ret)
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goto error;
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entry = kmalloc(sizeof(struct ocfs2_filecheck_sysfs_entry), GFP_NOFS);
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if (!entry) {
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ret = -ENOMEM;
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goto error;
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} else {
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atomic_set(&entry->fs_count, 1);
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entry->fs_sb = sb;
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entry->fs_devicekset = device_kset;
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entry->fs_fcheckkset = fcheck_kset;
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entry->fs_fcheck = fcheck;
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ocfs2_filecheck_sysfs_add(entry);
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}
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kfree(attrs);
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return 0;
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error:
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kfree(attrs);
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kfree(entry);
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kfree(fcheck);
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kset_unregister(fcheck_kset);
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kset_unregister(device_kset);
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return ret;
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}
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int ocfs2_filecheck_remove_sysfs(struct super_block *sb)
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{
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return ocfs2_filecheck_sysfs_del(sb->s_id);
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}
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static int
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ocfs2_filecheck_erase_entries(struct ocfs2_filecheck_sysfs_entry *ent,
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unsigned int count);
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static int
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ocfs2_filecheck_adjust_max(struct ocfs2_filecheck_sysfs_entry *ent,
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unsigned int len)
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{
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int ret;
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if ((len < OCFS2_FILECHECK_MINSIZE) || (len > OCFS2_FILECHECK_MAXSIZE))
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return -EINVAL;
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spin_lock(&ent->fs_fcheck->fc_lock);
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if (len < (ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done)) {
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mlog(ML_ERROR,
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"Cannot set online file check maximum entry number "
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"to %u due to too many pending entries(%u)\n",
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len, ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done);
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ret = -EBUSY;
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} else {
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if (len < ent->fs_fcheck->fc_size)
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BUG_ON(!ocfs2_filecheck_erase_entries(ent,
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ent->fs_fcheck->fc_size - len));
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ent->fs_fcheck->fc_max = len;
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ret = 0;
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}
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spin_unlock(&ent->fs_fcheck->fc_lock);
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return ret;
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}
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#define OCFS2_FILECHECK_ARGS_LEN 24
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static int
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ocfs2_filecheck_args_get_long(const char *buf, size_t count,
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unsigned long *val)
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{
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char buffer[OCFS2_FILECHECK_ARGS_LEN];
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memcpy(buffer, buf, count);
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buffer[count] = '\0';
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if (kstrtoul(buffer, 0, val))
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return 1;
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return 0;
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}
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static int
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ocfs2_filecheck_type_parse(const char *name, unsigned int *type)
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{
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if (!strncmp(name, "fix", 4))
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*type = OCFS2_FILECHECK_TYPE_FIX;
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else if (!strncmp(name, "check", 6))
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*type = OCFS2_FILECHECK_TYPE_CHK;
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else if (!strncmp(name, "set", 4))
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*type = OCFS2_FILECHECK_TYPE_SET;
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else
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return 1;
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return 0;
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}
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static int
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ocfs2_filecheck_args_parse(const char *name, const char *buf, size_t count,
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struct ocfs2_filecheck_args *args)
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|
{
|
||
|
|
unsigned long val = 0;
|
||
|
|
unsigned int type;
|
||
|
|
|
||
|
|
/* too short/long args length */
|
||
|
|
if ((count < 1) || (count >= OCFS2_FILECHECK_ARGS_LEN))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (ocfs2_filecheck_type_parse(name, &type))
|
||
|
|
return 1;
|
||
|
|
if (ocfs2_filecheck_args_get_long(buf, count, &val))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (val <= 0)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
args->fa_type = type;
|
||
|
|
if (type == OCFS2_FILECHECK_TYPE_SET)
|
||
|
|
args->fa_len = (unsigned int)val;
|
||
|
|
else
|
||
|
|
args->fa_ino = val;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t ocfs2_filecheck_show(struct kobject *kobj,
|
||
|
|
struct kobj_attribute *attr,
|
||
|
|
char *buf)
|
||
|
|
{
|
||
|
|
|
||
|
|
ssize_t ret = 0, total = 0, remain = PAGE_SIZE;
|
||
|
|
unsigned int type;
|
||
|
|
struct ocfs2_filecheck_entry *p;
|
||
|
|
struct ocfs2_filecheck_sysfs_entry *ent;
|
||
|
|
|
||
|
|
if (ocfs2_filecheck_type_parse(attr->attr.name, &type))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
ent = ocfs2_filecheck_sysfs_get(kobj->parent->name);
|
||
|
|
if (!ent) {
|
||
|
|
mlog(ML_ERROR,
|
||
|
|
"Cannot get the corresponding entry via device basename %s\n",
|
||
|
|
kobj->name);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (type == OCFS2_FILECHECK_TYPE_SET) {
|
||
|
|
spin_lock(&ent->fs_fcheck->fc_lock);
|
||
|
|
total = snprintf(buf, remain, "%u\n", ent->fs_fcheck->fc_max);
|
||
|
|
spin_unlock(&ent->fs_fcheck->fc_lock);
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = snprintf(buf, remain, "INO\t\tDONE\tERROR\n");
|
||
|
|
total += ret;
|
||
|
|
remain -= ret;
|
||
|
|
spin_lock(&ent->fs_fcheck->fc_lock);
|
||
|
|
list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) {
|
||
|
|
if (p->fe_type != type)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
ret = snprintf(buf + total, remain, "%lu\t\t%u\t%s\n",
|
||
|
|
p->fe_ino, p->fe_done,
|
||
|
|
ocfs2_filecheck_error(p->fe_status));
|
||
|
|
if (ret < 0) {
|
||
|
|
total = ret;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (ret == remain) {
|
||
|
|
/* snprintf() didn't fit */
|
||
|
|
total = -E2BIG;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
total += ret;
|
||
|
|
remain -= ret;
|
||
|
|
}
|
||
|
|
spin_unlock(&ent->fs_fcheck->fc_lock);
|
||
|
|
|
||
|
|
exit:
|
||
|
|
ocfs2_filecheck_sysfs_put(ent);
|
||
|
|
return total;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
ocfs2_filecheck_erase_entry(struct ocfs2_filecheck_sysfs_entry *ent)
|
||
|
|
{
|
||
|
|
struct ocfs2_filecheck_entry *p;
|
||
|
|
|
||
|
|
list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) {
|
||
|
|
if (p->fe_done) {
|
||
|
|
list_del(&p->fe_list);
|
||
|
|
kfree(p);
|
||
|
|
ent->fs_fcheck->fc_size--;
|
||
|
|
ent->fs_fcheck->fc_done--;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
ocfs2_filecheck_erase_entries(struct ocfs2_filecheck_sysfs_entry *ent,
|
||
|
|
unsigned int count)
|
||
|
|
{
|
||
|
|
unsigned int i = 0;
|
||
|
|
unsigned int ret = 0;
|
||
|
|
|
||
|
|
while (i++ < count) {
|
||
|
|
if (ocfs2_filecheck_erase_entry(ent))
|
||
|
|
ret++;
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return (ret == count ? 1 : 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
ocfs2_filecheck_done_entry(struct ocfs2_filecheck_sysfs_entry *ent,
|
||
|
|
struct ocfs2_filecheck_entry *entry)
|
||
|
|
{
|
||
|
|
entry->fe_done = 1;
|
||
|
|
spin_lock(&ent->fs_fcheck->fc_lock);
|
||
|
|
ent->fs_fcheck->fc_done++;
|
||
|
|
spin_unlock(&ent->fs_fcheck->fc_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int
|
||
|
|
ocfs2_filecheck_handle(struct super_block *sb,
|
||
|
|
unsigned long ino, unsigned int flags)
|
||
|
|
{
|
||
|
|
unsigned int ret = OCFS2_FILECHECK_ERR_SUCCESS;
|
||
|
|
struct inode *inode = NULL;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
inode = ocfs2_iget(OCFS2_SB(sb), ino, flags, 0);
|
||
|
|
if (IS_ERR(inode)) {
|
||
|
|
rc = (int)(-(long)inode);
|
||
|
|
if (rc >= OCFS2_FILECHECK_ERR_START &&
|
||
|
|
rc < OCFS2_FILECHECK_ERR_END)
|
||
|
|
ret = rc;
|
||
|
|
else
|
||
|
|
ret = OCFS2_FILECHECK_ERR_FAILED;
|
||
|
|
} else
|
||
|
|
iput(inode);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
ocfs2_filecheck_handle_entry(struct ocfs2_filecheck_sysfs_entry *ent,
|
||
|
|
struct ocfs2_filecheck_entry *entry)
|
||
|
|
{
|
||
|
|
if (entry->fe_type == OCFS2_FILECHECK_TYPE_CHK)
|
||
|
|
entry->fe_status = ocfs2_filecheck_handle(ent->fs_sb,
|
||
|
|
entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_CHK);
|
||
|
|
else if (entry->fe_type == OCFS2_FILECHECK_TYPE_FIX)
|
||
|
|
entry->fe_status = ocfs2_filecheck_handle(ent->fs_sb,
|
||
|
|
entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_FIX);
|
||
|
|
else
|
||
|
|
entry->fe_status = OCFS2_FILECHECK_ERR_UNSUPPORTED;
|
||
|
|
|
||
|
|
ocfs2_filecheck_done_entry(ent, entry);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t ocfs2_filecheck_store(struct kobject *kobj,
|
||
|
|
struct kobj_attribute *attr,
|
||
|
|
const char *buf, size_t count)
|
||
|
|
{
|
||
|
|
struct ocfs2_filecheck_args args;
|
||
|
|
struct ocfs2_filecheck_entry *entry;
|
||
|
|
struct ocfs2_filecheck_sysfs_entry *ent;
|
||
|
|
ssize_t ret = 0;
|
||
|
|
|
||
|
|
if (count == 0)
|
||
|
|
return count;
|
||
|
|
|
||
|
|
if (ocfs2_filecheck_args_parse(attr->attr.name, buf, count, &args)) {
|
||
|
|
mlog(ML_ERROR, "Invalid arguments for online file check\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ent = ocfs2_filecheck_sysfs_get(kobj->parent->name);
|
||
|
|
if (!ent) {
|
||
|
|
mlog(ML_ERROR,
|
||
|
|
"Cannot get the corresponding entry via device basename %s\n",
|
||
|
|
kobj->parent->name);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (args.fa_type == OCFS2_FILECHECK_TYPE_SET) {
|
||
|
|
ret = ocfs2_filecheck_adjust_max(ent, args.fa_len);
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
entry = kmalloc(sizeof(struct ocfs2_filecheck_entry), GFP_NOFS);
|
||
|
|
if (!entry) {
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock(&ent->fs_fcheck->fc_lock);
|
||
|
|
if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
|
||
|
|
(ent->fs_fcheck->fc_done == 0)) {
|
||
|
|
mlog(ML_ERROR,
|
||
|
|
"Cannot do more file check "
|
||
|
|
"since file check queue(%u) is full now\n",
|
||
|
|
ent->fs_fcheck->fc_max);
|
||
|
|
ret = -EBUSY;
|
||
|
|
kfree(entry);
|
||
|
|
} else {
|
||
|
|
if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
|
||
|
|
(ent->fs_fcheck->fc_done > 0)) {
|
||
|
|
/* Delete the oldest entry which was done,
|
||
|
|
* make sure the entry size in list does
|
||
|
|
* not exceed maximum value
|
||
|
|
*/
|
||
|
|
BUG_ON(!ocfs2_filecheck_erase_entry(ent));
|
||
|
|
}
|
||
|
|
|
||
|
|
entry->fe_ino = args.fa_ino;
|
||
|
|
entry->fe_type = args.fa_type;
|
||
|
|
entry->fe_done = 0;
|
||
|
|
entry->fe_status = OCFS2_FILECHECK_ERR_INPROGRESS;
|
||
|
|
list_add_tail(&entry->fe_list, &ent->fs_fcheck->fc_head);
|
||
|
|
ent->fs_fcheck->fc_size++;
|
||
|
|
}
|
||
|
|
spin_unlock(&ent->fs_fcheck->fc_lock);
|
||
|
|
|
||
|
|
if (!ret)
|
||
|
|
ocfs2_filecheck_handle_entry(ent, entry);
|
||
|
|
|
||
|
|
exit:
|
||
|
|
ocfs2_filecheck_sysfs_put(ent);
|
||
|
|
return (!ret ? count : ret);
|
||
|
|
}
|