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800 lines
20 KiB
800 lines
20 KiB
// 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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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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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/blkdev.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 status_show(struct gfs2_sbd *sdp, char *buf) |
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{ |
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unsigned long f = sdp->sd_flags; |
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ssize_t s; |
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s = snprintf(buf, PAGE_SIZE, |
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"Journal Checked: %d\n" |
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"Journal Live: %d\n" |
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"Journal ID: %d\n" |
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"Spectator: %d\n" |
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"Withdrawn: %d\n" |
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"No barriers: %d\n" |
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"No recovery: %d\n" |
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"Demote: %d\n" |
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"No Journal ID: %d\n" |
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"Mounted RO: %d\n" |
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"RO Recovery: %d\n" |
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"Skip DLM Unlock: %d\n" |
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"Force AIL Flush: %d\n" |
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"FS Frozen: %d\n" |
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"Withdrawing: %d\n" |
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"Withdraw In Prog: %d\n" |
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"Remote Withdraw: %d\n" |
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"Withdraw Recovery: %d\n" |
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"sd_log_error: %d\n" |
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"sd_log_flush_lock: %d\n" |
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"sd_log_num_revoke: %u\n" |
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"sd_log_in_flight: %d\n" |
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"sd_log_blks_needed: %d\n" |
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"sd_log_blks_free: %d\n" |
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"sd_log_flush_head: %d\n" |
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"sd_log_flush_tail: %d\n" |
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"sd_log_blks_reserved: %d\n" |
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"sd_log_revokes_available: %d\n", |
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test_bit(SDF_JOURNAL_CHECKED, &f), |
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test_bit(SDF_JOURNAL_LIVE, &f), |
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(sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0), |
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(sdp->sd_args.ar_spectator ? 1 : 0), |
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test_bit(SDF_WITHDRAWN, &f), |
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test_bit(SDF_NOBARRIERS, &f), |
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test_bit(SDF_NORECOVERY, &f), |
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test_bit(SDF_DEMOTE, &f), |
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test_bit(SDF_NOJOURNALID, &f), |
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(sb_rdonly(sdp->sd_vfs) ? 1 : 0), |
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test_bit(SDF_RORECOVERY, &f), |
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test_bit(SDF_SKIP_DLM_UNLOCK, &f), |
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test_bit(SDF_FORCE_AIL_FLUSH, &f), |
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test_bit(SDF_FS_FROZEN, &f), |
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test_bit(SDF_WITHDRAWING, &f), |
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test_bit(SDF_WITHDRAW_IN_PROG, &f), |
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test_bit(SDF_REMOTE_WITHDRAW, &f), |
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test_bit(SDF_WITHDRAW_RECOVERY, &f), |
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sdp->sd_log_error, |
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rwsem_is_locked(&sdp->sd_log_flush_lock), |
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sdp->sd_log_num_revoke, |
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atomic_read(&sdp->sd_log_in_flight), |
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atomic_read(&sdp->sd_log_blks_needed), |
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atomic_read(&sdp->sd_log_blks_free), |
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sdp->sd_log_flush_head, |
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sdp->sd_log_flush_tail, |
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sdp->sd_log_blks_reserved, |
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atomic_read(&sdp->sd_log_revokes_available)); |
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return s; |
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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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GFS2_ATTR(status, 0400, status_show, NULL); |
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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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&gfs2_attr_status.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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complete(&sdp->sd_kobj_unregister); |
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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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|
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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) |
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return -EINVAL; |
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|
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if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
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rv = -ESHUTDOWN; |
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goto out; |
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} |
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rv = gfs2_recover_set(sdp, jid); |
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out: |
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return rv ? rv : len; |
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} |
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|
|
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); |
|
|
|
init_completion(&sdp->sd_kobj_unregister); |
|
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); |
|
wait_for_completion(&sdp->sd_kobj_unregister); |
|
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); |
|
wait_for_completion(&sdp->sd_kobj_unregister); |
|
} |
|
|
|
static int gfs2_uevent(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); |
|
} |
|
|
|
|