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linux/fs/gfs2/sys.c
David Teigland b3b94faa5f [GFS2] The core of GFS2 
This patch contains all the core files for GFS2.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-16 16:50:04 +00:00

641 lines
18 KiB
C
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/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*/
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include "gfs2.h"
#include "lm.h"
#include "sys.h"
#include "super.h"
#include "glock.h"
#include "quota.h"
char *gfs2_sys_margs;
spinlock_t gfs2_sys_margs_lock;
static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
{
return sprintf(buf, "%s\n", sdp->sd_vfs->s_id);
}
static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
{
return sprintf(buf, "%s\n", sdp->sd_fsname);
}
static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
{
unsigned int count;
down(&sdp->sd_freeze_lock);
count = sdp->sd_freeze_count;
up(&sdp->sd_freeze_lock);
return sprintf(buf, "%u\n", count);
}
static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
ssize_t ret = len;
int error = 0;
int n = simple_strtol(buf, NULL, 0);
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
switch (n) {
case 0:
gfs2_unfreeze_fs(sdp);
break;
case 1:
error = gfs2_freeze_fs(sdp);
break;
default:
ret = -EINVAL;
}
if (error)
fs_warn(sdp, "freeze %d error %d", n, error);
return ret;
}
static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
{
unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
return sprintf(buf, "%u\n", b);
}
static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (simple_strtol(buf, NULL, 0) != 1)
return -EINVAL;
gfs2_lm_withdraw(sdp,
"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
sdp->sd_fsname);
return len;
}
static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
size_t len)
{
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (simple_strtol(buf, NULL, 0) != 1)
return -EINVAL;
gfs2_statfs_sync(sdp);
return len;
}
static ssize_t shrink_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (simple_strtol(buf, NULL, 0) != 1)
return -EINVAL;
gfs2_gl_hash_clear(sdp, NO_WAIT);
return len;
}
static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
size_t len)
{
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (simple_strtol(buf, NULL, 0) != 1)
return -EINVAL;
gfs2_quota_sync(sdp);
return len;
}
static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
size_t len)
{
uint32_t id;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
id = simple_strtoul(buf, NULL, 0);
gfs2_quota_refresh(sdp, 1, id);
return len;
}
static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
size_t len)
{
uint32_t id;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
id = simple_strtoul(buf, NULL, 0);
gfs2_quota_refresh(sdp, 0, id);
return len;
}
struct gfs2_attr {
struct attribute attr;
ssize_t (*show)(struct gfs2_sbd *, char *);
ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
};
#define GFS2_ATTR(name, mode, show, store) \
static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
GFS2_ATTR(id, 0444, id_show, NULL);
GFS2_ATTR(fsname, 0444, fsname_show, NULL);
GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
GFS2_ATTR(shrink, 0200, NULL, shrink_store);
GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
static struct attribute *gfs2_attrs[] = {
&gfs2_attr_id.attr,
&gfs2_attr_fsname.attr,
&gfs2_attr_freeze.attr,
&gfs2_attr_shrink.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,
NULL,
};
static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
return a->show ? a->show(sdp, buf) : 0;
}
static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len)
{
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
return a->store ? a->store(sdp, buf, len) : len;
}
static struct sysfs_ops gfs2_attr_ops = {
.show = gfs2_attr_show,
.store = gfs2_attr_store,
};
static struct kobj_type gfs2_ktype = {
.default_attrs = gfs2_attrs,
.sysfs_ops = &gfs2_attr_ops,
};
static struct kset gfs2_kset = {
.subsys = &fs_subsys,
.kobj = {.name = "gfs2",},
.ktype = &gfs2_ktype,
};
/*
* display struct lm_lockstruct fields
*/
struct lockstruct_attr {
struct attribute attr;
ssize_t (*show)(struct gfs2_sbd *, char *);
};
#define LOCKSTRUCT_ATTR(name, fmt) \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
{ \
return sprintf(buf, fmt, sdp->sd_lockstruct.ls_##name); \
} \
static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
LOCKSTRUCT_ATTR(jid, "%u\n");
LOCKSTRUCT_ATTR(first, "%u\n");
LOCKSTRUCT_ATTR(lvb_size, "%u\n");
LOCKSTRUCT_ATTR(flags, "%d\n");
static struct attribute *lockstruct_attrs[] = {
&lockstruct_attr_jid.attr,
&lockstruct_attr_first.attr,
&lockstruct_attr_lvb_size.attr,
&lockstruct_attr_flags.attr,
NULL
};
/*
* display struct gfs2_args fields
*/
struct args_attr {
struct attribute attr;
ssize_t (*show)(struct gfs2_sbd *, char *);
};
#define ARGS_ATTR(name, fmt) \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
{ \
return sprintf(buf, fmt, sdp->sd_args.ar_##name); \
} \
static struct args_attr args_attr_##name = __ATTR_RO(name)
ARGS_ATTR(lockproto, "%s\n");
ARGS_ATTR(locktable, "%s\n");
ARGS_ATTR(hostdata, "%s\n");
ARGS_ATTR(spectator, "%d\n");
ARGS_ATTR(ignore_local_fs, "%d\n");
ARGS_ATTR(localcaching, "%d\n");
ARGS_ATTR(localflocks, "%d\n");
ARGS_ATTR(debug, "%d\n");
ARGS_ATTR(upgrade, "%d\n");
ARGS_ATTR(num_glockd, "%u\n");
ARGS_ATTR(posix_acl, "%d\n");
ARGS_ATTR(quota, "%u\n");
ARGS_ATTR(suiddir, "%d\n");
ARGS_ATTR(data, "%d\n");
/* one oddball doesn't fit the macro mold */
static ssize_t noatime_show(struct gfs2_sbd *sdp, char *buf)
{
return sprintf(buf, "%d\n", !!test_bit(SDF_NOATIME, &sdp->sd_flags));
}
static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
static struct attribute *args_attrs[] = {
&args_attr_lockproto.attr,
&args_attr_locktable.attr,
&args_attr_hostdata.attr,
&args_attr_spectator.attr,
&args_attr_ignore_local_fs.attr,
&args_attr_localcaching.attr,
&args_attr_localflocks.attr,
&args_attr_debug.attr,
&args_attr_upgrade.attr,
&args_attr_num_glockd.attr,
&args_attr_posix_acl.attr,
&args_attr_quota.attr,
&args_attr_suiddir.attr,
&args_attr_data.attr,
&args_attr_noatime.attr,
NULL
};
/*
* display counters from superblock
*/
struct counters_attr {
struct attribute attr;
ssize_t (*show)(struct gfs2_sbd *, char *);
};
#define COUNTERS_ATTR_GENERAL(name, fmt, val) \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
{ \
return sprintf(buf, fmt, val); \
} \
static struct counters_attr counters_attr_##name = __ATTR_RO(name)
#define COUNTERS_ATTR_SIMPLE(name, fmt) \
COUNTERS_ATTR_GENERAL(name, fmt, sdp->sd_##name)
#define COUNTERS_ATTR_ATOMIC(name, fmt) \
COUNTERS_ATTR_GENERAL(name, fmt, (unsigned int)atomic_read(&sdp->sd_##name))
COUNTERS_ATTR_ATOMIC(glock_count, "%u\n");
COUNTERS_ATTR_ATOMIC(glock_held_count, "%u\n");
COUNTERS_ATTR_ATOMIC(inode_count, "%u\n");
COUNTERS_ATTR_ATOMIC(bufdata_count, "%u\n");
COUNTERS_ATTR_ATOMIC(unlinked_count, "%u\n");
COUNTERS_ATTR_ATOMIC(quota_count, "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_gl, "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_buf, "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_revoke, "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_rg, "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_databuf, "%u\n");
COUNTERS_ATTR_SIMPLE(log_blks_free, "%u\n");
COUNTERS_ATTR_GENERAL(jd_blocks, "%u\n", sdp->sd_jdesc->jd_blocks);
COUNTERS_ATTR_ATOMIC(reclaim_count, "%u\n");
COUNTERS_ATTR_SIMPLE(log_wraps, "%llu\n");
COUNTERS_ATTR_ATOMIC(fh2dentry_misses, "%u\n");
COUNTERS_ATTR_ATOMIC(reclaimed, "%u\n");
COUNTERS_ATTR_ATOMIC(log_flush_incore, "%u\n");
COUNTERS_ATTR_ATOMIC(log_flush_ondisk, "%u\n");
COUNTERS_ATTR_ATOMIC(glock_nq_calls, "%u\n");
COUNTERS_ATTR_ATOMIC(glock_dq_calls, "%u\n");
COUNTERS_ATTR_ATOMIC(glock_prefetch_calls, "%u\n");
COUNTERS_ATTR_ATOMIC(lm_lock_calls, "%u\n");
COUNTERS_ATTR_ATOMIC(lm_unlock_calls, "%u\n");
COUNTERS_ATTR_ATOMIC(lm_callbacks, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_address, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_dentry, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_export, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_file, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_inode, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_super, "%u\n");
COUNTERS_ATTR_ATOMIC(ops_vm, "%u\n");
static struct attribute *counters_attrs[] = {
&counters_attr_glock_count.attr,
&counters_attr_glock_held_count.attr,
&counters_attr_inode_count.attr,
&counters_attr_bufdata_count.attr,
&counters_attr_unlinked_count.attr,
&counters_attr_quota_count.attr,
&counters_attr_log_num_gl.attr,
&counters_attr_log_num_buf.attr,
&counters_attr_log_num_revoke.attr,
&counters_attr_log_num_rg.attr,
&counters_attr_log_num_databuf.attr,
&counters_attr_log_blks_free.attr,
&counters_attr_jd_blocks.attr,
&counters_attr_reclaim_count.attr,
&counters_attr_log_wraps.attr,
&counters_attr_fh2dentry_misses.attr,
&counters_attr_reclaimed.attr,
&counters_attr_log_flush_incore.attr,
&counters_attr_log_flush_ondisk.attr,
&counters_attr_glock_nq_calls.attr,
&counters_attr_glock_dq_calls.attr,
&counters_attr_glock_prefetch_calls.attr,
&counters_attr_lm_lock_calls.attr,
&counters_attr_lm_unlock_calls.attr,
&counters_attr_lm_callbacks.attr,
&counters_attr_ops_address.attr,
&counters_attr_ops_dentry.attr,
&counters_attr_ops_export.attr,
&counters_attr_ops_file.attr,
&counters_attr_ops_inode.attr,
&counters_attr_ops_super.attr,
&counters_attr_ops_vm.attr,
NULL
};
/*
* get and set struct gfs2_tune fields
*/
static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
{
return sprintf(buf, "%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 -EACCES;
if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
return -EINVAL;
spin_lock(&gt->gt_spin);
gt->gt_quota_scale_num = x;
gt->gt_quota_scale_den = y;
spin_unlock(&gt->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;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
x = simple_strtoul(buf, NULL, 0);
if (check_zero && !x)
return -EINVAL;
spin_lock(&gt->gt_spin);
*field = x;
spin_unlock(&gt->gt_spin);
return len;
}
struct tune_attr {
struct attribute attr;
ssize_t (*show)(struct gfs2_sbd *, char *);
ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
};
#define TUNE_ATTR_3(name, show, store) \
static struct tune_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 sprintf(buf, "%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)
#define TUNE_ATTR_DAEMON(name, process) \
static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
{ \
ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
wake_up_process(sdp->sd_##process); \
return r; \
} \
TUNE_ATTR_2(name, name##_store)
TUNE_ATTR(ilimit, 0);
TUNE_ATTR(ilimit_tries, 0);
TUNE_ATTR(ilimit_min, 0);
TUNE_ATTR(demote_secs, 0);
TUNE_ATTR(incore_log_blocks, 0);
TUNE_ATTR(log_flush_secs, 0);
TUNE_ATTR(jindex_refresh_secs, 0);
TUNE_ATTR(quota_warn_period, 0);
TUNE_ATTR(quota_quantum, 0);
TUNE_ATTR(atime_quantum, 0);
TUNE_ATTR(max_readahead, 0);
TUNE_ATTR(complain_secs, 0);
TUNE_ATTR(reclaim_limit, 0);
TUNE_ATTR(prefetch_secs, 0);
TUNE_ATTR(statfs_slow, 0);
TUNE_ATTR(new_files_jdata, 0);
TUNE_ATTR(new_files_directio, 0);
TUNE_ATTR(quota_simul_sync, 1);
TUNE_ATTR(quota_cache_secs, 1);
TUNE_ATTR(max_atomic_write, 1);
TUNE_ATTR(stall_secs, 1);
TUNE_ATTR(entries_per_readdir, 1);
TUNE_ATTR(greedy_default, 1);
TUNE_ATTR(greedy_quantum, 1);
TUNE_ATTR(greedy_max, 1);
TUNE_ATTR(statfs_quantum, 1);
TUNE_ATTR_DAEMON(scand_secs, scand_process);
TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
TUNE_ATTR_DAEMON(logd_secs, logd_process);
TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
TUNE_ATTR_DAEMON(inoded_secs, inoded_process);
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
static struct attribute *tune_attrs[] = {
&tune_attr_ilimit.attr,
&tune_attr_ilimit_tries.attr,
&tune_attr_ilimit_min.attr,
&tune_attr_demote_secs.attr,
&tune_attr_incore_log_blocks.attr,
&tune_attr_log_flush_secs.attr,
&tune_attr_jindex_refresh_secs.attr,
&tune_attr_quota_warn_period.attr,
&tune_attr_quota_quantum.attr,
&tune_attr_atime_quantum.attr,
&tune_attr_max_readahead.attr,
&tune_attr_complain_secs.attr,
&tune_attr_reclaim_limit.attr,
&tune_attr_prefetch_secs.attr,
&tune_attr_statfs_slow.attr,
&tune_attr_quota_simul_sync.attr,
&tune_attr_quota_cache_secs.attr,
&tune_attr_max_atomic_write.attr,
&tune_attr_stall_secs.attr,
&tune_attr_entries_per_readdir.attr,
&tune_attr_greedy_default.attr,
&tune_attr_greedy_quantum.attr,
&tune_attr_greedy_max.attr,
&tune_attr_statfs_quantum.attr,
&tune_attr_scand_secs.attr,
&tune_attr_recoverd_secs.attr,
&tune_attr_logd_secs.attr,
&tune_attr_quotad_secs.attr,
&tune_attr_inoded_secs.attr,
&tune_attr_quota_scale.attr,
&tune_attr_new_files_jdata.attr,
&tune_attr_new_files_directio.attr,
NULL
};
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:
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);
return kset_register(&gfs2_kset);
}
void gfs2_sys_uninit(void)
{
kfree(gfs2_sys_margs);
kset_unregister(&gfs2_kset);
}
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