801 lines
20 KiB
C
801 lines
20 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/sched.h>
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#include <linux/cred.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/module.h>
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#include <linux/kobject.h>
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#include <linux/uaccess.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/blkdev.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "sys.h"
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#include "super.h"
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#include "glock.h"
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#include "quota.h"
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#include "util.h"
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#include "glops.h"
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#include "recovery.h"
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struct gfs2_attr {
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struct attribute attr;
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ssize_t (*show)(struct gfs2_sbd *, char *);
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ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
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};
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static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
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char *buf)
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{
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struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
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struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
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return a->show ? a->show(sdp, buf) : 0;
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}
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static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
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const char *buf, size_t len)
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{
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struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
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struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
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return a->store ? a->store(sdp, buf, len) : len;
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}
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static const struct sysfs_ops gfs2_attr_ops = {
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.show = gfs2_attr_show,
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.store = gfs2_attr_store,
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};
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static struct kset *gfs2_kset;
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static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%u:%u\n",
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MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
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}
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static ssize_t status_show(struct gfs2_sbd *sdp, char *buf)
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{
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unsigned long f = sdp->sd_flags;
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ssize_t s;
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s = snprintf(buf, PAGE_SIZE,
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"Journal Checked: %d\n"
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"Journal Live: %d\n"
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"Journal ID: %d\n"
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"Spectator: %d\n"
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"Withdrawn: %d\n"
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"No barriers: %d\n"
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"No recovery: %d\n"
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"Demote: %d\n"
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"No Journal ID: %d\n"
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"Mounted RO: %d\n"
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"RO Recovery: %d\n"
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"Skip DLM Unlock: %d\n"
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"Force AIL Flush: %d\n"
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"FS Frozen: %d\n"
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"Withdrawing: %d\n"
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"Withdraw In Prog: %d\n"
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"Remote Withdraw: %d\n"
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"Withdraw Recovery: %d\n"
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"sd_log_error: %d\n"
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"sd_log_flush_lock: %d\n"
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"sd_log_num_revoke: %u\n"
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"sd_log_in_flight: %d\n"
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"sd_log_blks_needed: %d\n"
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"sd_log_blks_free: %d\n"
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"sd_log_flush_head: %d\n"
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"sd_log_flush_tail: %d\n"
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"sd_log_blks_reserved: %d\n"
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"sd_log_revokes_available: %d\n",
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test_bit(SDF_JOURNAL_CHECKED, &f),
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test_bit(SDF_JOURNAL_LIVE, &f),
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(sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0),
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(sdp->sd_args.ar_spectator ? 1 : 0),
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test_bit(SDF_WITHDRAWN, &f),
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test_bit(SDF_NOBARRIERS, &f),
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test_bit(SDF_NORECOVERY, &f),
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test_bit(SDF_DEMOTE, &f),
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test_bit(SDF_NOJOURNALID, &f),
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(sb_rdonly(sdp->sd_vfs) ? 1 : 0),
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test_bit(SDF_RORECOVERY, &f),
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test_bit(SDF_SKIP_DLM_UNLOCK, &f),
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test_bit(SDF_FORCE_AIL_FLUSH, &f),
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test_bit(SDF_FS_FROZEN, &f),
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test_bit(SDF_WITHDRAWING, &f),
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test_bit(SDF_WITHDRAW_IN_PROG, &f),
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test_bit(SDF_REMOTE_WITHDRAW, &f),
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test_bit(SDF_WITHDRAW_RECOVERY, &f),
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sdp->sd_log_error,
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rwsem_is_locked(&sdp->sd_log_flush_lock),
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sdp->sd_log_num_revoke,
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atomic_read(&sdp->sd_log_in_flight),
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atomic_read(&sdp->sd_log_blks_needed),
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atomic_read(&sdp->sd_log_blks_free),
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sdp->sd_log_flush_head,
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sdp->sd_log_flush_tail,
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sdp->sd_log_blks_reserved,
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atomic_read(&sdp->sd_log_revokes_available));
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return s;
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}
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static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
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}
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static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct super_block *s = sdp->sd_vfs;
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buf[0] = '\0';
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if (uuid_is_null(&s->s_uuid))
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return 0;
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return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
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}
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static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct super_block *sb = sdp->sd_vfs;
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int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
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return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
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}
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static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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int error, n;
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error = kstrtoint(buf, 0, &n);
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if (error)
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return error;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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switch (n) {
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case 0:
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error = thaw_super(sdp->sd_vfs);
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break;
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case 1:
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error = freeze_super(sdp->sd_vfs);
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break;
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default:
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return -EINVAL;
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}
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if (error) {
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fs_warn(sdp, "freeze %d error %d\n", n, error);
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return error;
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}
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return len;
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}
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static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
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{
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unsigned int b = gfs2_withdrawn(sdp);
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return snprintf(buf, PAGE_SIZE, "%u\n", b);
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}
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static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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int error, val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtoint(buf, 0, &val);
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if (error)
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return error;
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if (val != 1)
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return -EINVAL;
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gfs2_lm(sdp, "withdrawing from cluster at user's request\n");
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gfs2_withdraw(sdp);
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return len;
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}
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static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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int error, val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtoint(buf, 0, &val);
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if (error)
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return error;
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if (val != 1)
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return -EINVAL;
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gfs2_statfs_sync(sdp->sd_vfs, 0);
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return len;
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}
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static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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int error, val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtoint(buf, 0, &val);
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if (error)
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return error;
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if (val != 1)
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return -EINVAL;
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gfs2_quota_sync(sdp->sd_vfs, 0);
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return len;
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}
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static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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struct kqid qid;
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int error;
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u32 id;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtou32(buf, 0, &id);
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if (error)
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return error;
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qid = make_kqid(current_user_ns(), USRQUOTA, id);
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if (!qid_valid(qid))
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return -EINVAL;
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error = gfs2_quota_refresh(sdp, qid);
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return error ? error : len;
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}
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static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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struct kqid qid;
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int error;
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u32 id;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtou32(buf, 0, &id);
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if (error)
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return error;
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qid = make_kqid(current_user_ns(), GRPQUOTA, id);
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if (!qid_valid(qid))
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return -EINVAL;
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error = gfs2_quota_refresh(sdp, qid);
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return error ? error : len;
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}
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static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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struct gfs2_glock *gl;
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const struct gfs2_glock_operations *glops;
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unsigned int glmode;
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unsigned int gltype;
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unsigned long long glnum;
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char mode[16];
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int rv;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
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mode);
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if (rv != 3)
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return -EINVAL;
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if (strcmp(mode, "EX") == 0)
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glmode = LM_ST_UNLOCKED;
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else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
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glmode = LM_ST_DEFERRED;
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else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
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glmode = LM_ST_SHARED;
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else
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return -EINVAL;
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if (gltype > LM_TYPE_JOURNAL)
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return -EINVAL;
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if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
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glops = &gfs2_freeze_glops;
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else
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glops = gfs2_glops_list[gltype];
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if (glops == NULL)
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return -EINVAL;
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if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
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fs_info(sdp, "demote interface used\n");
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rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
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if (rv)
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return rv;
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gfs2_glock_cb(gl, glmode);
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gfs2_glock_put(gl);
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return len;
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}
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#define GFS2_ATTR(name, mode, show, store) \
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static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
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GFS2_ATTR(id, 0444, id_show, NULL);
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GFS2_ATTR(fsname, 0444, fsname_show, NULL);
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GFS2_ATTR(uuid, 0444, uuid_show, NULL);
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GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
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GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
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GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
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GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
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GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
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GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
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GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
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GFS2_ATTR(status, 0400, status_show, NULL);
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static struct attribute *gfs2_attrs[] = {
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&gfs2_attr_id.attr,
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&gfs2_attr_fsname.attr,
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&gfs2_attr_uuid.attr,
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|
|
&gfs2_attr_freeze.attr,
|
||
|
|
&gfs2_attr_withdraw.attr,
|
||
|
|
&gfs2_attr_statfs_sync.attr,
|
||
|
|
&gfs2_attr_quota_sync.attr,
|
||
|
|
&gfs2_attr_quota_refresh_user.attr,
|
||
|
|
&gfs2_attr_quota_refresh_group.attr,
|
||
|
|
&gfs2_attr_demote_rq.attr,
|
||
|
|
&gfs2_attr_status.attr,
|
||
|
|
NULL,
|
||
|
|
};
|
||
|
|
ATTRIBUTE_GROUPS(gfs2);
|
||
|
|
|
||
|
|
static void gfs2_sbd_release(struct kobject *kobj)
|
||
|
|
{
|
||
|
|
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
|
||
|
|
|
||
|
|
complete(&sdp->sd_kobj_unregister);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct kobj_type gfs2_ktype = {
|
||
|
|
.release = gfs2_sbd_release,
|
||
|
|
.default_groups = gfs2_groups,
|
||
|
|
.sysfs_ops = &gfs2_attr_ops,
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* lock_module. Originally from lock_dlm
|
||
|
|
*/
|
||
|
|
|
||
|
|
static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
|
||
|
|
return sprintf(buf, "%s\n", ops->lm_proto_name);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
||
|
|
ssize_t ret;
|
||
|
|
int val = 0;
|
||
|
|
|
||
|
|
if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
|
||
|
|
val = 1;
|
||
|
|
ret = sprintf(buf, "%d\n", val);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
||
|
|
int ret, val;
|
||
|
|
|
||
|
|
ret = kstrtoint(buf, 0, &val);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (val == 1)
|
||
|
|
set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
|
||
|
|
else if (val == 0) {
|
||
|
|
clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
|
||
|
|
smp_mb__after_atomic();
|
||
|
|
gfs2_glock_thaw(sdp);
|
||
|
|
} else {
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
|
||
|
|
|
||
|
|
return sprintf(buf, "%d\n", val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
int ret, val;
|
||
|
|
|
||
|
|
ret = kstrtoint(buf, 0, &val);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if ((val == 1) &&
|
||
|
|
!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
|
||
|
|
complete(&sdp->sd_wdack);
|
||
|
|
else
|
||
|
|
return -EINVAL;
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
||
|
|
return sprintf(buf, "%d\n", ls->ls_first);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
unsigned first;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
rv = sscanf(buf, "%u", &first);
|
||
|
|
if (rv != 1 || first > 1)
|
||
|
|
return -EINVAL;
|
||
|
|
rv = wait_for_completion_killable(&sdp->sd_locking_init);
|
||
|
|
if (rv)
|
||
|
|
return rv;
|
||
|
|
spin_lock(&sdp->sd_jindex_spin);
|
||
|
|
rv = -EBUSY;
|
||
|
|
if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
|
||
|
|
goto out;
|
||
|
|
rv = -EINVAL;
|
||
|
|
if (sdp->sd_args.ar_spectator)
|
||
|
|
goto out;
|
||
|
|
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
|
||
|
|
goto out;
|
||
|
|
sdp->sd_lockstruct.ls_first = first;
|
||
|
|
rv = 0;
|
||
|
|
out:
|
||
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
||
|
|
return rv ? rv : len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
||
|
|
return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
|
||
|
|
}
|
||
|
|
|
||
|
|
int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
|
||
|
|
{
|
||
|
|
struct gfs2_jdesc *jd;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
/* Wait for our primary journal to be initialized */
|
||
|
|
wait_for_completion(&sdp->sd_journal_ready);
|
||
|
|
|
||
|
|
spin_lock(&sdp->sd_jindex_spin);
|
||
|
|
rv = -EBUSY;
|
||
|
|
/**
|
||
|
|
* If we're a spectator, we use journal0, but it's not really ours.
|
||
|
|
* So we need to wait for its recovery too. If we skip it we'd never
|
||
|
|
* queue work to the recovery workqueue, and so its completion would
|
||
|
|
* never clear the DFL_BLOCK_LOCKS flag, so all our locks would
|
||
|
|
* permanently stop working.
|
||
|
|
*/
|
||
|
|
if (!sdp->sd_jdesc)
|
||
|
|
goto out;
|
||
|
|
if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
|
||
|
|
goto out;
|
||
|
|
rv = -ENOENT;
|
||
|
|
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
|
||
|
|
if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
|
||
|
|
continue;
|
||
|
|
rv = gfs2_recover_journal(jd, false);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
out:
|
||
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
unsigned jid;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
rv = sscanf(buf, "%u", &jid);
|
||
|
|
if (rv != 1)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
|
||
|
|
rv = -ESHUTDOWN;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
rv = gfs2_recover_set(sdp, jid);
|
||
|
|
out:
|
||
|
|
return rv ? rv : len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
||
|
|
return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
||
|
|
return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
int jid;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
rv = sscanf(buf, "%d", &jid);
|
||
|
|
if (rv != 1)
|
||
|
|
return -EINVAL;
|
||
|
|
rv = wait_for_completion_killable(&sdp->sd_locking_init);
|
||
|
|
if (rv)
|
||
|
|
return rv;
|
||
|
|
spin_lock(&sdp->sd_jindex_spin);
|
||
|
|
rv = -EINVAL;
|
||
|
|
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
|
||
|
|
goto out;
|
||
|
|
rv = -EBUSY;
|
||
|
|
if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
|
||
|
|
goto out;
|
||
|
|
rv = 0;
|
||
|
|
if (sdp->sd_args.ar_spectator && jid > 0)
|
||
|
|
rv = jid = -EINVAL;
|
||
|
|
sdp->sd_lockstruct.ls_jid = jid;
|
||
|
|
clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
|
||
|
|
smp_mb__after_atomic();
|
||
|
|
wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
|
||
|
|
out:
|
||
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
||
|
|
return rv ? rv : len;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define GDLM_ATTR(_name,_mode,_show,_store) \
|
||
|
|
static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
|
||
|
|
|
||
|
|
GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
|
||
|
|
GDLM_ATTR(block, 0644, block_show, block_store);
|
||
|
|
GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
|
||
|
|
GDLM_ATTR(jid, 0644, jid_show, jid_store);
|
||
|
|
GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
|
||
|
|
GDLM_ATTR(first_done, 0444, first_done_show, NULL);
|
||
|
|
GDLM_ATTR(recover, 0600, NULL, recover_store);
|
||
|
|
GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
|
||
|
|
GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
|
||
|
|
|
||
|
|
static struct attribute *lock_module_attrs[] = {
|
||
|
|
&gdlm_attr_proto_name.attr,
|
||
|
|
&gdlm_attr_block.attr,
|
||
|
|
&gdlm_attr_withdraw.attr,
|
||
|
|
&gdlm_attr_jid.attr,
|
||
|
|
&gdlm_attr_first.attr,
|
||
|
|
&gdlm_attr_first_done.attr,
|
||
|
|
&gdlm_attr_recover.attr,
|
||
|
|
&gdlm_attr_recover_done.attr,
|
||
|
|
&gdlm_attr_recover_status.attr,
|
||
|
|
NULL,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* get and set struct gfs2_tune fields
|
||
|
|
*/
|
||
|
|
|
||
|
|
static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
|
||
|
|
{
|
||
|
|
return snprintf(buf, PAGE_SIZE, "%u %u\n",
|
||
|
|
sdp->sd_tune.gt_quota_scale_num,
|
||
|
|
sdp->sd_tune.gt_quota_scale_den);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
|
||
|
|
size_t len)
|
||
|
|
{
|
||
|
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
||
|
|
unsigned int x, y;
|
||
|
|
|
||
|
|
if (!capable(CAP_SYS_ADMIN))
|
||
|
|
return -EPERM;
|
||
|
|
|
||
|
|
if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
spin_lock(>->gt_spin);
|
||
|
|
gt->gt_quota_scale_num = x;
|
||
|
|
gt->gt_quota_scale_den = y;
|
||
|
|
spin_unlock(>->gt_spin);
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
|
||
|
|
int check_zero, const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
||
|
|
unsigned int x;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
if (!capable(CAP_SYS_ADMIN))
|
||
|
|
return -EPERM;
|
||
|
|
|
||
|
|
error = kstrtouint(buf, 0, &x);
|
||
|
|
if (error)
|
||
|
|
return error;
|
||
|
|
|
||
|
|
if (check_zero && !x)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
spin_lock(>->gt_spin);
|
||
|
|
*field = x;
|
||
|
|
spin_unlock(>->gt_spin);
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define TUNE_ATTR_3(name, show, store) \
|
||
|
|
static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
|
||
|
|
|
||
|
|
#define TUNE_ATTR_2(name, store) \
|
||
|
|
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
|
||
|
|
{ \
|
||
|
|
return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
|
||
|
|
} \
|
||
|
|
TUNE_ATTR_3(name, name##_show, store)
|
||
|
|
|
||
|
|
#define TUNE_ATTR(name, check_zero) \
|
||
|
|
static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
|
||
|
|
{ \
|
||
|
|
return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
|
||
|
|
} \
|
||
|
|
TUNE_ATTR_2(name, name##_store)
|
||
|
|
|
||
|
|
TUNE_ATTR(quota_warn_period, 0);
|
||
|
|
TUNE_ATTR(quota_quantum, 0);
|
||
|
|
TUNE_ATTR(max_readahead, 0);
|
||
|
|
TUNE_ATTR(complain_secs, 0);
|
||
|
|
TUNE_ATTR(statfs_slow, 0);
|
||
|
|
TUNE_ATTR(new_files_jdata, 0);
|
||
|
|
TUNE_ATTR(statfs_quantum, 1);
|
||
|
|
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
|
||
|
|
|
||
|
|
static struct attribute *tune_attrs[] = {
|
||
|
|
&tune_attr_quota_warn_period.attr,
|
||
|
|
&tune_attr_quota_quantum.attr,
|
||
|
|
&tune_attr_max_readahead.attr,
|
||
|
|
&tune_attr_complain_secs.attr,
|
||
|
|
&tune_attr_statfs_slow.attr,
|
||
|
|
&tune_attr_statfs_quantum.attr,
|
||
|
|
&tune_attr_quota_scale.attr,
|
||
|
|
&tune_attr_new_files_jdata.attr,
|
||
|
|
NULL,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct attribute_group tune_group = {
|
||
|
|
.name = "tune",
|
||
|
|
.attrs = tune_attrs,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct attribute_group lock_module_group = {
|
||
|
|
.name = "lock_module",
|
||
|
|
.attrs = lock_module_attrs,
|
||
|
|
};
|
||
|
|
|
||
|
|
int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
|
||
|
|
{
|
||
|
|
struct super_block *sb = sdp->sd_vfs;
|
||
|
|
int error;
|
||
|
|
char ro[20];
|
||
|
|
char spectator[20];
|
||
|
|
char *envp[] = { ro, spectator, NULL };
|
||
|
|
|
||
|
|
sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
|
||
|
|
sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
|
||
|
|
|
||
|
|
init_completion(&sdp->sd_kobj_unregister);
|
||
|
|
sdp->sd_kobj.kset = gfs2_kset;
|
||
|
|
error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
|
||
|
|
"%s", sdp->sd_table_name);
|
||
|
|
if (error)
|
||
|
|
goto fail_reg;
|
||
|
|
|
||
|
|
error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
|
||
|
|
if (error)
|
||
|
|
goto fail_reg;
|
||
|
|
|
||
|
|
error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
|
||
|
|
if (error)
|
||
|
|
goto fail_tune;
|
||
|
|
|
||
|
|
error = sysfs_create_link(&sdp->sd_kobj,
|
||
|
|
&disk_to_dev(sb->s_bdev->bd_disk)->kobj,
|
||
|
|
"device");
|
||
|
|
if (error)
|
||
|
|
goto fail_lock_module;
|
||
|
|
|
||
|
|
kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail_lock_module:
|
||
|
|
sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
|
||
|
|
fail_tune:
|
||
|
|
sysfs_remove_group(&sdp->sd_kobj, &tune_group);
|
||
|
|
fail_reg:
|
||
|
|
fs_err(sdp, "error %d adding sysfs files\n", error);
|
||
|
|
kobject_put(&sdp->sd_kobj);
|
||
|
|
wait_for_completion(&sdp->sd_kobj_unregister);
|
||
|
|
sb->s_fs_info = NULL;
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
|
||
|
|
{
|
||
|
|
sysfs_remove_link(&sdp->sd_kobj, "device");
|
||
|
|
sysfs_remove_group(&sdp->sd_kobj, &tune_group);
|
||
|
|
sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
|
||
|
|
kobject_put(&sdp->sd_kobj);
|
||
|
|
wait_for_completion(&sdp->sd_kobj_unregister);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gfs2_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
|
||
|
|
{
|
||
|
|
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
|
||
|
|
struct super_block *s = sdp->sd_vfs;
|
||
|
|
|
||
|
|
add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
|
||
|
|
add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
|
||
|
|
if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
|
||
|
|
add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
|
||
|
|
if (!uuid_is_null(&s->s_uuid))
|
||
|
|
add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct kset_uevent_ops gfs2_uevent_ops = {
|
||
|
|
.uevent = gfs2_uevent,
|
||
|
|
};
|
||
|
|
|
||
|
|
int gfs2_sys_init(void)
|
||
|
|
{
|
||
|
|
gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
|
||
|
|
if (!gfs2_kset)
|
||
|
|
return -ENOMEM;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void gfs2_sys_uninit(void)
|
||
|
|
{
|
||
|
|
kset_unregister(gfs2_kset);
|
||
|
|
}
|
||
|
|
|