![Bob Peterson](/assets/img/avatar_default.png)
When a node withdraws from a file system, it often leaves its journal in an incomplete state. This is especially true when the withdraw is caused by io errors writing to the journal. Before this patch, a withdraw would try to write a "shutdown" record to the journal, tell dlm it's done with the file system, and none of the other nodes know about the problem. Later, when the problem is fixed and the withdrawn node is rebooted, it would then discover that its own journal was incomplete, and replay it. However, replaying it at this point is almost guaranteed to introduce corruption because the other nodes are likely to have used affected resource groups that appeared in the journal since the time of the withdraw. Replaying the journal later will overwrite any changes made, and not through any fault of dlm, which was instructed during the withdraw to release those resources. This patch makes file system withdraws seen by the entire cluster. Withdrawing nodes dequeue their journal glock to allow recovery. The remaining nodes check all the journals to see if they are clean or in need of replay. They try to replay dirty journals, but only the journals of withdrawn nodes will be "not busy" and therefore available for replay. Until the journal replay is complete, no i/o related glocks may be given out, to ensure that the replay does not cause the aforementioned corruption: We cannot allow any journal replay to overwrite blocks associated with a glock once it is held. The "live" glock which is now used to signal when a withdraw occurs. When a withdraw occurs, the node signals its withdraw by dequeueing the "live" glock and trying to enqueue it in EX mode, thus forcing the other nodes to all see a demote request, by way of a "1CB" (one callback) try lock. The "live" glock is not granted in EX; the callback is only just used to indicate a withdraw has occurred. Note that all nodes in the cluster must wait for the recovering node to finish replaying the withdrawing node's journal before continuing. To this end, it checks that the journals are clean multiple times in a retry loop. Also note that the withdraw function may be called from a wide variety of situations, and therefore, we need to take extra precautions to make sure pointers are valid before using them in many circumstances. We also need to take care when glocks decide to withdraw, since the withdraw code now uses glocks. Also, before this patch, if a process encountered an error and decided to withdraw, if another process was already withdrawing, the second withdraw would be silently ignored, which set it free to unlock its glocks. That's correct behavior if the original withdrawer encounters further errors down the road. But if secondary waiters don't wait for the journal replay, unlocking glocks will allow other nodes to use them, despite the fact that the journal containing those blocks is being replayed. The replay needs to finish before our glocks are released to other nodes. IOW, secondary withdraws need to wait for the first withdraw to finish. For example, if an rgrp glock is unlocked by a process that didn't wait for the first withdraw, a journal replay could introduce file system corruption by replaying a rgrp block that has already been granted to a different cluster node. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
732 lines
18 KiB
C
732 lines
18 KiB
C
// 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/genhd.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 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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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,
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&gfs2_attr_withdraw.attr,
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&gfs2_attr_statfs_sync.attr,
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&gfs2_attr_quota_sync.attr,
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&gfs2_attr_quota_refresh_user.attr,
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&gfs2_attr_quota_refresh_group.attr,
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&gfs2_attr_demote_rq.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(gfs2);
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static void gfs2_sbd_release(struct kobject *kobj)
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{
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struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
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free_sbd(sdp);
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}
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static struct kobj_type gfs2_ktype = {
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.release = gfs2_sbd_release,
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.default_groups = gfs2_groups,
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.sysfs_ops = &gfs2_attr_ops,
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};
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/*
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* lock_module. Originally from lock_dlm
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*/
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static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
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{
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const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
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return sprintf(buf, "%s\n", ops->lm_proto_name);
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}
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static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct lm_lockstruct *ls = &sdp->sd_lockstruct;
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ssize_t ret;
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int val = 0;
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if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
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val = 1;
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ret = sprintf(buf, "%d\n", val);
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return ret;
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}
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static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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struct lm_lockstruct *ls = &sdp->sd_lockstruct;
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int ret, 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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set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
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else if (val == 0) {
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clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
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smp_mb__after_atomic();
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gfs2_glock_thaw(sdp);
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} else {
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return -EINVAL;
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}
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return len;
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}
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static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
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{
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int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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int ret, 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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!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
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complete(&sdp->sd_wdack);
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else
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return -EINVAL;
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return len;
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}
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static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct lm_lockstruct *ls = &sdp->sd_lockstruct;
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return sprintf(buf, "%d\n", ls->ls_first);
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}
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static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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unsigned first;
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int rv;
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rv = sscanf(buf, "%u", &first);
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if (rv != 1 || first > 1)
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return -EINVAL;
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rv = wait_for_completion_killable(&sdp->sd_locking_init);
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if (rv)
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return rv;
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spin_lock(&sdp->sd_jindex_spin);
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rv = -EBUSY;
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if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
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goto out;
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rv = -EINVAL;
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if (sdp->sd_args.ar_spectator)
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goto out;
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if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
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goto out;
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sdp->sd_lockstruct.ls_first = first;
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rv = 0;
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out:
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spin_unlock(&sdp->sd_jindex_spin);
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return rv ? rv : len;
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}
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static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct lm_lockstruct *ls = &sdp->sd_lockstruct;
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return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
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}
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int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
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{
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struct gfs2_jdesc *jd;
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int rv;
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/* Wait for our primary journal to be initialized */
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wait_for_completion(&sdp->sd_journal_ready);
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spin_lock(&sdp->sd_jindex_spin);
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rv = -EBUSY;
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/**
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* If we're a spectator, we use journal0, but it's not really ours.
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* So we need to wait for its recovery too. If we skip it we'd never
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* queue work to the recovery workqueue, and so its completion would
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* never clear the DFL_BLOCK_LOCKS flag, so all our locks would
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* permanently stop working.
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*/
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if (!sdp->sd_jdesc)
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goto out;
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if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
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goto out;
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rv = -ENOENT;
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list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
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if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
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continue;
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rv = gfs2_recover_journal(jd, false);
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break;
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}
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out:
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spin_unlock(&sdp->sd_jindex_spin);
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return rv;
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}
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static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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unsigned jid;
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int rv;
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rv = sscanf(buf, "%u", &jid);
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|
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);
|
|
|
|
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);
|
|
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);
|
|
}
|
|
|
|
static int gfs2_uevent(struct kset *kset, 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);
|
|
}
|
|
|