/fs/gfs2/sys.c
C | 487 lines | 386 code | 84 blank | 17 comment | 26 complexity | 5618d018a69a6c38e2beb89c42084d07 MD5 | raw file
Possible License(s): AGPL-1.0, GPL-2.0, LGPL-2.0
- /*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 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 version 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 <linux/gfs2_ondisk.h>
- #include <linux/lm_interface.h>
- #include <asm/uaccess.h>
- #include "gfs2.h"
- #include "incore.h"
- #include "sys.h"
- #include "super.h"
- #include "glock.h"
- #include "quota.h"
- #include "util.h"
- static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
- {
- return snprintf(buf, PAGE_SIZE, "%u:%u\n",
- MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
- }
- static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
- {
- return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
- }
- static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
- {
- unsigned int count;
- mutex_lock(&sdp->sd_freeze_lock);
- count = sdp->sd_freeze_count;
- mutex_unlock(&sdp->sd_freeze_lock);
- return snprintf(buf, PAGE_SIZE, "%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 snprintf(buf, PAGE_SIZE, "%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 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)
- {
- u32 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)
- {
- u32 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(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_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;
- /*
- * 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 snprintf(buf, PAGE_SIZE, 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 snprintf(buf, PAGE_SIZE, 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(posix_acl, "%d\n");
- ARGS_ATTR(quota, "%u\n");
- ARGS_ATTR(suiddir, "%d\n");
- ARGS_ATTR(data, "%d\n");
- 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_posix_acl.attr,
- &args_attr_quota.attr,
- &args_attr_suiddir.attr,
- &args_attr_data.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 -EACCES;
- 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;
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- x = simple_strtoul(buf, NULL, 0);
- if (check_zero && !x)
- return -EINVAL;
- spin_lock(>->gt_spin);
- *field = x;
- spin_unlock(>->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 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)
- #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(incore_log_blocks, 0);
- TUNE_ATTR(log_flush_secs, 0);
- 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(quota_simul_sync, 1);
- TUNE_ATTR(quota_cache_secs, 1);
- TUNE_ATTR(stall_secs, 1);
- TUNE_ATTR(statfs_quantum, 1);
- TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
- TUNE_ATTR_DAEMON(logd_secs, logd_process);
- TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
- static struct attribute *tune_attrs[] = {
- &tune_attr_incore_log_blocks.attr,
- &tune_attr_log_flush_secs.attr,
- &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_quota_simul_sync.attr,
- &tune_attr_quota_cache_secs.attr,
- &tune_attr_stall_secs.attr,
- &tune_attr_statfs_quantum.attr,
- &tune_attr_recoverd_secs.attr,
- &tune_attr_logd_secs.attr,
- &tune_attr_quota_scale.attr,
- &tune_attr_new_files_jdata.attr,
- NULL,
- };
- static struct attribute_group lockstruct_group = {
- .name = "lockstruct",
- .attrs = lockstruct_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;
- error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
- "%s", sdp->sd_table_name);
- 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, &args_group);
- if (error)
- goto fail_lockstruct;
- error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
- if (error)
- goto fail_args;
- kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
- return 0;
- fail_args:
- sysfs_remove_group(&sdp->sd_kobj, &args_group);
- fail_lockstruct:
- sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
- fail_reg:
- kobject_put(&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, &lockstruct_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);
- add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
- add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
- return 0;
- }
- static 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);
- }