566 lines
15 KiB
C
566 lines
15 KiB
C
/*
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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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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#include <linux/sched.h>
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#include <linux/slab.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/gfs2_ondisk.h>
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#include <linux/lm_interface.h>
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#include <asm/uaccess.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "lm.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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char *gfs2_sys_margs;
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spinlock_t gfs2_sys_margs_lock;
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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, "%s\n", sdp->sd_vfs->s_id);
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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 freeze_show(struct gfs2_sbd *sdp, char *buf)
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{
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unsigned int count;
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mutex_lock(&sdp->sd_freeze_lock);
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count = sdp->sd_freeze_count;
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mutex_unlock(&sdp->sd_freeze_lock);
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return snprintf(buf, PAGE_SIZE, "%u\n", count);
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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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ssize_t ret = len;
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int error = 0;
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int n = simple_strtol(buf, NULL, 0);
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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switch (n) {
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case 0:
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gfs2_unfreeze_fs(sdp);
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break;
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case 1:
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error = gfs2_freeze_fs(sdp);
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break;
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default:
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ret = -EINVAL;
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}
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if (error)
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fs_warn(sdp, "freeze %d error %d", n, error);
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return ret;
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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 = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
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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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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (simple_strtol(buf, NULL, 0) != 1)
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return -EINVAL;
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gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
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sdp->sd_fsname);
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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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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (simple_strtol(buf, NULL, 0) != 1)
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return -EINVAL;
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gfs2_statfs_sync(sdp);
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return len;
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}
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static ssize_t shrink_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (simple_strtol(buf, NULL, 0) != 1)
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return -EINVAL;
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gfs2_gl_hash_clear(sdp, NO_WAIT);
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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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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (simple_strtol(buf, NULL, 0) != 1)
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return -EINVAL;
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gfs2_quota_sync(sdp);
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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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u32 id;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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id = simple_strtoul(buf, NULL, 0);
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gfs2_quota_refresh(sdp, 1, id);
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return 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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u32 id;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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id = simple_strtoul(buf, NULL, 0);
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gfs2_quota_refresh(sdp, 0, id);
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return len;
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}
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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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#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(freeze, 0644, freeze_show, freeze_store);
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GFS2_ATTR(shrink, 0200, NULL, shrink_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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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_freeze.attr,
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&gfs2_attr_shrink.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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NULL,
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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 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 kobj_type gfs2_ktype = {
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.default_attrs = gfs2_attrs,
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.sysfs_ops = &gfs2_attr_ops,
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};
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static struct kset gfs2_kset = {
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.kobj = {.name = "gfs2"},
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.ktype = &gfs2_ktype,
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};
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/*
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* display struct lm_lockstruct fields
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*/
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struct lockstruct_attr {
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struct attribute attr;
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ssize_t (*show)(struct gfs2_sbd *, char *);
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};
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#define LOCKSTRUCT_ATTR(name, fmt) \
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static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
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{ \
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return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
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} \
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static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
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LOCKSTRUCT_ATTR(jid, "%u\n");
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LOCKSTRUCT_ATTR(first, "%u\n");
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LOCKSTRUCT_ATTR(lvb_size, "%u\n");
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LOCKSTRUCT_ATTR(flags, "%d\n");
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static struct attribute *lockstruct_attrs[] = {
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&lockstruct_attr_jid.attr,
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&lockstruct_attr_first.attr,
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&lockstruct_attr_lvb_size.attr,
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&lockstruct_attr_flags.attr,
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NULL,
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};
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/*
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* display struct gfs2_args fields
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*/
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struct args_attr {
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struct attribute attr;
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ssize_t (*show)(struct gfs2_sbd *, char *);
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};
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#define ARGS_ATTR(name, fmt) \
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static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
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{ \
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return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
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} \
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static struct args_attr args_attr_##name = __ATTR_RO(name)
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ARGS_ATTR(lockproto, "%s\n");
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ARGS_ATTR(locktable, "%s\n");
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ARGS_ATTR(hostdata, "%s\n");
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ARGS_ATTR(spectator, "%d\n");
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ARGS_ATTR(ignore_local_fs, "%d\n");
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ARGS_ATTR(localcaching, "%d\n");
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ARGS_ATTR(localflocks, "%d\n");
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ARGS_ATTR(debug, "%d\n");
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ARGS_ATTR(upgrade, "%d\n");
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ARGS_ATTR(num_glockd, "%u\n");
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ARGS_ATTR(posix_acl, "%d\n");
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ARGS_ATTR(quota, "%u\n");
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ARGS_ATTR(suiddir, "%d\n");
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ARGS_ATTR(data, "%d\n");
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/* one oddball doesn't fit the macro mold */
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static ssize_t noatime_show(struct gfs2_sbd *sdp, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n",
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!!test_bit(SDF_NOATIME, &sdp->sd_flags));
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}
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static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
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static struct attribute *args_attrs[] = {
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&args_attr_lockproto.attr,
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&args_attr_locktable.attr,
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&args_attr_hostdata.attr,
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&args_attr_spectator.attr,
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&args_attr_ignore_local_fs.attr,
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&args_attr_localcaching.attr,
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&args_attr_localflocks.attr,
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&args_attr_debug.attr,
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&args_attr_upgrade.attr,
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&args_attr_num_glockd.attr,
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&args_attr_posix_acl.attr,
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&args_attr_quota.attr,
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&args_attr_suiddir.attr,
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&args_attr_data.attr,
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&args_attr_noatime.attr,
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NULL,
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};
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/*
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* display counters from superblock
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*/
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struct counters_attr {
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struct attribute attr;
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ssize_t (*show)(struct gfs2_sbd *, char *);
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};
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#define COUNTERS_ATTR(name, fmt) \
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static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
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{ \
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return snprintf(buf, PAGE_SIZE, fmt, \
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(unsigned int)atomic_read(&sdp->sd_##name)); \
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} \
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static struct counters_attr counters_attr_##name = __ATTR_RO(name)
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COUNTERS_ATTR(glock_count, "%u\n");
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COUNTERS_ATTR(glock_held_count, "%u\n");
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COUNTERS_ATTR(inode_count, "%u\n");
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COUNTERS_ATTR(reclaimed, "%u\n");
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static struct attribute *counters_attrs[] = {
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&counters_attr_glock_count.attr,
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&counters_attr_glock_held_count.attr,
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&counters_attr_inode_count.attr,
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&counters_attr_reclaimed.attr,
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NULL,
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};
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/*
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* get and set struct gfs2_tune fields
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*/
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static ssize_t quota_scale_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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sdp->sd_tune.gt_quota_scale_num,
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sdp->sd_tune.gt_quota_scale_den);
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}
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static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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struct gfs2_tune *gt = &sdp->sd_tune;
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unsigned int x, y;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
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return -EINVAL;
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spin_lock(>->gt_spin);
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gt->gt_quota_scale_num = x;
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gt->gt_quota_scale_den = y;
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spin_unlock(>->gt_spin);
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return len;
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}
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static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
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int check_zero, const char *buf, size_t len)
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{
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struct gfs2_tune *gt = &sdp->sd_tune;
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unsigned int x;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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x = simple_strtoul(buf, NULL, 0);
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if (check_zero && !x)
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return -EINVAL;
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spin_lock(>->gt_spin);
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*field = x;
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spin_unlock(>->gt_spin);
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return len;
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}
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struct tune_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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#define TUNE_ATTR_3(name, show, store) \
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static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
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#define TUNE_ATTR_2(name, store) \
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static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
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{ \
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return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
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} \
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TUNE_ATTR_3(name, name##_show, store)
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#define TUNE_ATTR(name, check_zero) \
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static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
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{ \
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return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
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} \
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TUNE_ATTR_2(name, name##_store)
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#define TUNE_ATTR_DAEMON(name, process) \
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static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
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{ \
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ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
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wake_up_process(sdp->sd_##process); \
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return r; \
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} \
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TUNE_ATTR_2(name, name##_store)
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TUNE_ATTR(demote_secs, 0);
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TUNE_ATTR(incore_log_blocks, 0);
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TUNE_ATTR(log_flush_secs, 0);
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TUNE_ATTR(jindex_refresh_secs, 0);
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TUNE_ATTR(quota_warn_period, 0);
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TUNE_ATTR(quota_quantum, 0);
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TUNE_ATTR(atime_quantum, 0);
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TUNE_ATTR(max_readahead, 0);
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TUNE_ATTR(complain_secs, 0);
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TUNE_ATTR(reclaim_limit, 0);
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TUNE_ATTR(statfs_slow, 0);
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TUNE_ATTR(new_files_jdata, 0);
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TUNE_ATTR(new_files_directio, 0);
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TUNE_ATTR(quota_simul_sync, 1);
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TUNE_ATTR(quota_cache_secs, 1);
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TUNE_ATTR(stall_secs, 1);
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TUNE_ATTR(statfs_quantum, 1);
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TUNE_ATTR_DAEMON(scand_secs, scand_process);
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TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
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TUNE_ATTR_DAEMON(logd_secs, logd_process);
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TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
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TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
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static struct attribute *tune_attrs[] = {
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&tune_attr_demote_secs.attr,
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&tune_attr_incore_log_blocks.attr,
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&tune_attr_log_flush_secs.attr,
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&tune_attr_jindex_refresh_secs.attr,
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&tune_attr_quota_warn_period.attr,
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&tune_attr_quota_quantum.attr,
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&tune_attr_atime_quantum.attr,
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&tune_attr_max_readahead.attr,
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&tune_attr_complain_secs.attr,
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&tune_attr_reclaim_limit.attr,
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&tune_attr_statfs_slow.attr,
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&tune_attr_quota_simul_sync.attr,
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&tune_attr_quota_cache_secs.attr,
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&tune_attr_stall_secs.attr,
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&tune_attr_statfs_quantum.attr,
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&tune_attr_scand_secs.attr,
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&tune_attr_recoverd_secs.attr,
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&tune_attr_logd_secs.attr,
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&tune_attr_quotad_secs.attr,
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&tune_attr_quota_scale.attr,
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&tune_attr_new_files_jdata.attr,
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&tune_attr_new_files_directio.attr,
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NULL,
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|
};
|
|
|
|
static struct attribute_group lockstruct_group = {
|
|
.name = "lockstruct",
|
|
.attrs = lockstruct_attrs,
|
|
};
|
|
|
|
static struct attribute_group counters_group = {
|
|
.name = "counters",
|
|
.attrs = counters_attrs,
|
|
};
|
|
|
|
static struct attribute_group args_group = {
|
|
.name = "args",
|
|
.attrs = args_attrs,
|
|
};
|
|
|
|
static struct attribute_group tune_group = {
|
|
.name = "tune",
|
|
.attrs = tune_attrs,
|
|
};
|
|
|
|
int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
|
|
{
|
|
int error;
|
|
|
|
sdp->sd_kobj.kset = &gfs2_kset;
|
|
sdp->sd_kobj.ktype = &gfs2_ktype;
|
|
|
|
error = kobject_set_name(&sdp->sd_kobj, "%s", sdp->sd_table_name);
|
|
if (error)
|
|
goto fail;
|
|
|
|
error = kobject_register(&sdp->sd_kobj);
|
|
if (error)
|
|
goto fail;
|
|
|
|
error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
|
|
if (error)
|
|
goto fail_reg;
|
|
|
|
error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
|
|
if (error)
|
|
goto fail_lockstruct;
|
|
|
|
error = sysfs_create_group(&sdp->sd_kobj, &args_group);
|
|
if (error)
|
|
goto fail_counters;
|
|
|
|
error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
|
|
if (error)
|
|
goto fail_args;
|
|
|
|
return 0;
|
|
|
|
fail_args:
|
|
sysfs_remove_group(&sdp->sd_kobj, &args_group);
|
|
fail_counters:
|
|
sysfs_remove_group(&sdp->sd_kobj, &counters_group);
|
|
fail_lockstruct:
|
|
sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
|
|
fail_reg:
|
|
kobject_unregister(&sdp->sd_kobj);
|
|
fail:
|
|
fs_err(sdp, "error %d adding sysfs files", error);
|
|
return error;
|
|
}
|
|
|
|
void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
|
|
{
|
|
sysfs_remove_group(&sdp->sd_kobj, &tune_group);
|
|
sysfs_remove_group(&sdp->sd_kobj, &args_group);
|
|
sysfs_remove_group(&sdp->sd_kobj, &counters_group);
|
|
sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
|
|
kobject_unregister(&sdp->sd_kobj);
|
|
}
|
|
|
|
int gfs2_sys_init(void)
|
|
{
|
|
gfs2_sys_margs = NULL;
|
|
spin_lock_init(&gfs2_sys_margs_lock);
|
|
kobj_set_kset_s(&gfs2_kset, fs_subsys);
|
|
return kset_register(&gfs2_kset);
|
|
}
|
|
|
|
void gfs2_sys_uninit(void)
|
|
{
|
|
kfree(gfs2_sys_margs);
|
|
kset_unregister(&gfs2_kset);
|
|
}
|
|
|