/* * 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 "lm.h" #include "sys.h" #include "super.h" #include "glock.h" #include "quota.h" #include "util.h" char *gfs2_sys_margs; spinlock_t gfs2_sys_margs_lock; 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 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) { 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(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; /* * 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(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 snprintf(buf, PAGE_SIZE, "%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(name, fmt) \ static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ { \ return snprintf(buf, PAGE_SIZE, fmt, \ (unsigned int)atomic_read(&sdp->sd_##name)); \ } \ static struct counters_attr counters_attr_##name = __ATTR_RO(name) COUNTERS_ATTR(glock_count, "%u\n"); COUNTERS_ATTR(glock_held_count, "%u\n"); COUNTERS_ATTR(inode_count, "%u\n"); COUNTERS_ATTR(reclaimed, "%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_reclaimed.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(demote_secs, 0); 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(atime_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(new_files_directio, 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_DAEMON(quotad_secs, quotad_process); TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); static struct attribute *tune_attrs[] = { &tune_attr_demote_secs.attr, &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_atime_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_quotad_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; 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, &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; kobject_uevent(&sdp->sd_kobj, KOBJ_ADD); 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_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, &counters_group); sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group); kobject_put(&sdp->sd_kobj); } int gfs2_sys_init(void) { gfs2_sys_margs = NULL; spin_lock_init(&gfs2_sys_margs_lock); gfs2_kset = kset_create_and_add("gfs2", NULL, fs_kobj); if (!gfs2_kset) return -ENOMEM; return 0; } void gfs2_sys_uninit(void) { kfree(gfs2_sys_margs); kset_unregister(gfs2_kset); }