// 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) 2004-2008 Red Hat, Inc. All rights reserved.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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/blkdev.h>
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#include <linux/kthread.h>
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#include <linux/export.h>
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#include <linux/namei.h>
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#include <linux/mount.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/quotaops.h>
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#include <linux/lockdep.h>
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#include <linux/module.h>
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#include <linux/backing-dev.h>
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#include <linux/fs_parser.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "bmap.h"
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#include "glock.h"
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#include "glops.h"
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#include "inode.h"
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#include "recovery.h"
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#include "rgrp.h"
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#include "super.h"
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#include "sys.h"
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#include "util.h"
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#include "log.h"
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#include "quota.h"
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#include "dir.h"
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#include "meta_io.h"
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#include "trace_gfs2.h"
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#include "lops.h"
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#define DO 0
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#define UNDO 1
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/**
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* gfs2_tune_init - Fill a gfs2_tune structure with default values
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* @gt: tune
|
*
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*/
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static void gfs2_tune_init(struct gfs2_tune *gt)
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{
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spin_lock_init(>->gt_spin);
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gt->gt_quota_warn_period = 10;
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gt->gt_quota_scale_num = 1;
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gt->gt_quota_scale_den = 1;
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gt->gt_new_files_jdata = 0;
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gt->gt_max_readahead = BIT(18);
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gt->gt_complain_secs = 10;
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}
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void free_sbd(struct gfs2_sbd *sdp)
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{
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if (sdp->sd_lkstats)
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free_percpu(sdp->sd_lkstats);
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kfree(sdp);
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}
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static struct gfs2_sbd *init_sbd(struct super_block *sb)
|
{
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struct gfs2_sbd *sdp;
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struct address_space *mapping;
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sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
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if (!sdp)
|
return NULL;
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sdp->sd_vfs = sb;
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sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats);
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if (!sdp->sd_lkstats)
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goto fail;
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sb->s_fs_info = sdp;
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set_bit(SDF_NOJOURNALID, &sdp->sd_flags);
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gfs2_tune_init(&sdp->sd_tune);
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init_waitqueue_head(&sdp->sd_glock_wait);
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init_waitqueue_head(&sdp->sd_async_glock_wait);
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atomic_set(&sdp->sd_glock_disposal, 0);
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init_completion(&sdp->sd_locking_init);
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init_completion(&sdp->sd_wdack);
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spin_lock_init(&sdp->sd_statfs_spin);
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spin_lock_init(&sdp->sd_rindex_spin);
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sdp->sd_rindex_tree.rb_node = NULL;
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INIT_LIST_HEAD(&sdp->sd_jindex_list);
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spin_lock_init(&sdp->sd_jindex_spin);
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mutex_init(&sdp->sd_jindex_mutex);
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init_completion(&sdp->sd_journal_ready);
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INIT_LIST_HEAD(&sdp->sd_quota_list);
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mutex_init(&sdp->sd_quota_mutex);
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mutex_init(&sdp->sd_quota_sync_mutex);
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init_waitqueue_head(&sdp->sd_quota_wait);
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INIT_LIST_HEAD(&sdp->sd_trunc_list);
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spin_lock_init(&sdp->sd_trunc_lock);
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spin_lock_init(&sdp->sd_bitmap_lock);
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INIT_LIST_HEAD(&sdp->sd_sc_inodes_list);
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mapping = &sdp->sd_aspace;
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address_space_init_once(mapping);
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mapping->a_ops = &gfs2_rgrp_aops;
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mapping->host = sb->s_bdev->bd_inode;
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mapping->flags = 0;
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mapping_set_gfp_mask(mapping, GFP_NOFS);
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mapping->private_data = NULL;
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mapping->writeback_index = 0;
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spin_lock_init(&sdp->sd_log_lock);
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atomic_set(&sdp->sd_log_pinned, 0);
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INIT_LIST_HEAD(&sdp->sd_log_revokes);
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INIT_LIST_HEAD(&sdp->sd_log_ordered);
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spin_lock_init(&sdp->sd_ordered_lock);
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init_waitqueue_head(&sdp->sd_log_waitq);
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init_waitqueue_head(&sdp->sd_logd_waitq);
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spin_lock_init(&sdp->sd_ail_lock);
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INIT_LIST_HEAD(&sdp->sd_ail1_list);
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INIT_LIST_HEAD(&sdp->sd_ail2_list);
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init_rwsem(&sdp->sd_log_flush_lock);
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atomic_set(&sdp->sd_log_in_flight, 0);
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atomic_set(&sdp->sd_reserving_log, 0);
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init_waitqueue_head(&sdp->sd_reserving_log_wait);
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init_waitqueue_head(&sdp->sd_log_flush_wait);
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atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
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mutex_init(&sdp->sd_freeze_mutex);
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return sdp;
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fail:
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free_sbd(sdp);
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return NULL;
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}
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/**
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* gfs2_check_sb - Check superblock
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* @sdp: the filesystem
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* @sb: The superblock
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* @silent: Don't print a message if the check fails
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*
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* Checks the version code of the FS is one that we understand how to
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* read and that the sizes of the various on-disk structures have not
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* changed.
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*/
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static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent)
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{
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struct gfs2_sb_host *sb = &sdp->sd_sb;
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if (sb->sb_magic != GFS2_MAGIC ||
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sb->sb_type != GFS2_METATYPE_SB) {
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if (!silent)
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pr_warn("not a GFS2 filesystem\n");
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return -EINVAL;
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}
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if (sb->sb_fs_format != GFS2_FORMAT_FS ||
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sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
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fs_warn(sdp, "Unknown on-disk format, unable to mount\n");
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return -EINVAL;
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}
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if (sb->sb_bsize < 512 || sb->sb_bsize > PAGE_SIZE ||
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(sb->sb_bsize & (sb->sb_bsize - 1))) {
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pr_warn("Invalid superblock size\n");
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return -EINVAL;
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}
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if (sb->sb_bsize_shift != ffs(sb->sb_bsize) - 1) {
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pr_warn("Invalid block size shift\n");
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return -EINVAL;
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}
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return 0;
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}
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static void end_bio_io_page(struct bio *bio)
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{
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struct page *page = bio->bi_private;
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if (!bio->bi_status)
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SetPageUptodate(page);
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else
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pr_warn("error %d reading superblock\n", bio->bi_status);
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unlock_page(page);
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}
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static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
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{
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struct gfs2_sb_host *sb = &sdp->sd_sb;
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struct super_block *s = sdp->sd_vfs;
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const struct gfs2_sb *str = buf;
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sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
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sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
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sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
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sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
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sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
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sb->sb_bsize = be32_to_cpu(str->sb_bsize);
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sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
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sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
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sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
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sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
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sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
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memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
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memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
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memcpy(&s->s_uuid, str->sb_uuid, 16);
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}
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/**
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* gfs2_read_super - Read the gfs2 super block from disk
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* @sdp: The GFS2 super block
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* @sector: The location of the super block
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* @error: The error code to return
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*
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* This uses the bio functions to read the super block from disk
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* because we want to be 100% sure that we never read cached data.
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* A super block is read twice only during each GFS2 mount and is
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* never written to by the filesystem. The first time its read no
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* locks are held, and the only details which are looked at are those
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* relating to the locking protocol. Once locking is up and working,
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* the sb is read again under the lock to establish the location of
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* the master directory (contains pointers to journals etc) and the
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* root directory.
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*
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* Returns: 0 on success or error
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*/
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static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
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{
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struct super_block *sb = sdp->sd_vfs;
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struct gfs2_sb *p;
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struct page *page;
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struct bio *bio;
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page = alloc_page(GFP_NOFS);
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if (unlikely(!page))
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return -ENOMEM;
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ClearPageUptodate(page);
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ClearPageDirty(page);
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lock_page(page);
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bio = bio_alloc(GFP_NOFS, 1);
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bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
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bio_set_dev(bio, sb->s_bdev);
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bio_add_page(bio, page, PAGE_SIZE, 0);
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bio->bi_end_io = end_bio_io_page;
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bio->bi_private = page;
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bio_set_op_attrs(bio, REQ_OP_READ, REQ_META);
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submit_bio(bio);
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wait_on_page_locked(page);
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bio_put(bio);
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if (!PageUptodate(page)) {
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__free_page(page);
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return -EIO;
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}
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p = kmap(page);
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gfs2_sb_in(sdp, p);
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kunmap(page);
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__free_page(page);
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return gfs2_check_sb(sdp, silent);
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}
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/**
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* gfs2_read_sb - Read super block
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* @sdp: The GFS2 superblock
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* @silent: Don't print message if mount fails
|
*
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*/
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static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
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{
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u32 hash_blocks, ind_blocks, leaf_blocks;
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u32 tmp_blocks;
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unsigned int x;
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int error;
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error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
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if (error) {
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if (!silent)
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fs_err(sdp, "can't read superblock\n");
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return error;
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}
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sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
|
GFS2_BASIC_BLOCK_SHIFT;
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sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
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sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
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sizeof(struct gfs2_dinode)) / sizeof(u64);
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sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
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sizeof(struct gfs2_meta_header)) / sizeof(u64);
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sdp->sd_ldptrs = (sdp->sd_sb.sb_bsize -
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sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
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sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
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sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
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sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
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sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
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sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
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sizeof(struct gfs2_meta_header)) /
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sizeof(struct gfs2_quota_change);
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sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
|
sizeof(struct gfs2_meta_header))
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* GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
|
|
/* Compute maximum reservation required to add a entry to a directory */
|
|
hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH),
|
sdp->sd_jbsize);
|
|
ind_blocks = 0;
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for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
|
tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
|
ind_blocks += tmp_blocks;
|
}
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|
leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
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|
sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
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|
sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
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sizeof(struct gfs2_dinode);
|
sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
|
for (x = 2;; x++) {
|
u64 space, d;
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u32 m;
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|
space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
|
d = space;
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m = do_div(d, sdp->sd_inptrs);
|
|
if (d != sdp->sd_heightsize[x - 1] || m)
|
break;
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sdp->sd_heightsize[x] = space;
|
}
|
sdp->sd_max_height = x;
|
sdp->sd_heightsize[x] = ~0;
|
gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
|
|
sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
|
sizeof(struct gfs2_leaf)) /
|
GFS2_MIN_DIRENT_SIZE;
|
return 0;
|
}
|
|
static int init_names(struct gfs2_sbd *sdp, int silent)
|
{
|
char *proto, *table;
|
int error = 0;
|
|
proto = sdp->sd_args.ar_lockproto;
|
table = sdp->sd_args.ar_locktable;
|
|
/* Try to autodetect */
|
|
if (!proto[0] || !table[0]) {
|
error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
|
if (error)
|
return error;
|
|
if (!proto[0])
|
proto = sdp->sd_sb.sb_lockproto;
|
if (!table[0])
|
table = sdp->sd_sb.sb_locktable;
|
}
|
|
if (!table[0])
|
table = sdp->sd_vfs->s_id;
|
|
BUILD_BUG_ON(GFS2_LOCKNAME_LEN > GFS2_FSNAME_LEN);
|
|
strscpy(sdp->sd_proto_name, proto, GFS2_LOCKNAME_LEN);
|
strscpy(sdp->sd_table_name, table, GFS2_LOCKNAME_LEN);
|
|
table = sdp->sd_table_name;
|
while ((table = strchr(table, '/')))
|
*table = '_';
|
|
return error;
|
}
|
|
static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
|
int undo)
|
{
|
int error = 0;
|
|
if (undo)
|
goto fail_trans;
|
|
error = gfs2_glock_nq_num(sdp,
|
GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
|
LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
|
mount_gh);
|
if (error) {
|
fs_err(sdp, "can't acquire mount glock: %d\n", error);
|
goto fail;
|
}
|
|
error = gfs2_glock_nq_num(sdp,
|
GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
|
LM_ST_SHARED,
|
LM_FLAG_NOEXP | GL_EXACT,
|
&sdp->sd_live_gh);
|
if (error) {
|
fs_err(sdp, "can't acquire live glock: %d\n", error);
|
goto fail_mount;
|
}
|
|
error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
|
CREATE, &sdp->sd_rename_gl);
|
if (error) {
|
fs_err(sdp, "can't create rename glock: %d\n", error);
|
goto fail_live;
|
}
|
|
error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops,
|
CREATE, &sdp->sd_freeze_gl);
|
if (error) {
|
fs_err(sdp, "can't create transaction glock: %d\n", error);
|
goto fail_rename;
|
}
|
|
return 0;
|
|
fail_trans:
|
gfs2_glock_put(sdp->sd_freeze_gl);
|
fail_rename:
|
gfs2_glock_put(sdp->sd_rename_gl);
|
fail_live:
|
gfs2_glock_dq_uninit(&sdp->sd_live_gh);
|
fail_mount:
|
gfs2_glock_dq_uninit(mount_gh);
|
fail:
|
return error;
|
}
|
|
static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
|
u64 no_addr, const char *name)
|
{
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
struct dentry *dentry;
|
struct inode *inode;
|
|
inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0,
|
GFS2_BLKST_FREE /* ignore */);
|
if (IS_ERR(inode)) {
|
fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
|
return PTR_ERR(inode);
|
}
|
dentry = d_make_root(inode);
|
if (!dentry) {
|
fs_err(sdp, "can't alloc %s dentry\n", name);
|
return -ENOMEM;
|
}
|
*dptr = dentry;
|
return 0;
|
}
|
|
static int init_sb(struct gfs2_sbd *sdp, int silent)
|
{
|
struct super_block *sb = sdp->sd_vfs;
|
struct gfs2_holder sb_gh;
|
u64 no_addr;
|
int ret;
|
|
ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
|
LM_ST_SHARED, 0, &sb_gh);
|
if (ret) {
|
fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
|
return ret;
|
}
|
|
ret = gfs2_read_sb(sdp, silent);
|
if (ret) {
|
fs_err(sdp, "can't read superblock: %d\n", ret);
|
goto out;
|
}
|
|
/* Set up the buffer cache and SB for real */
|
if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
|
ret = -EINVAL;
|
fs_err(sdp, "FS block size (%u) is too small for device "
|
"block size (%u)\n",
|
sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
|
goto out;
|
}
|
if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
|
ret = -EINVAL;
|
fs_err(sdp, "FS block size (%u) is too big for machine "
|
"page size (%u)\n",
|
sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
|
goto out;
|
}
|
sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
|
|
/* Get the root inode */
|
no_addr = sdp->sd_sb.sb_root_dir.no_addr;
|
ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
|
if (ret)
|
goto out;
|
|
/* Get the master inode */
|
no_addr = sdp->sd_sb.sb_master_dir.no_addr;
|
ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
|
if (ret) {
|
dput(sdp->sd_root_dir);
|
goto out;
|
}
|
sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
|
out:
|
gfs2_glock_dq_uninit(&sb_gh);
|
return ret;
|
}
|
|
static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
|
{
|
char *message = "FIRSTMOUNT=Done";
|
char *envp[] = { message, NULL };
|
|
fs_info(sdp, "first mount done, others may mount\n");
|
|
if (sdp->sd_lockstruct.ls_ops->lm_first_done)
|
sdp->sd_lockstruct.ls_ops->lm_first_done(sdp);
|
|
kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
|
}
|
|
/**
|
* gfs2_jindex_hold - Grab a lock on the jindex
|
* @sdp: The GFS2 superblock
|
* @ji_gh: the holder for the jindex glock
|
*
|
* Returns: errno
|
*/
|
|
static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
|
{
|
struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
|
struct qstr name;
|
char buf[20];
|
struct gfs2_jdesc *jd;
|
int error;
|
|
name.name = buf;
|
|
mutex_lock(&sdp->sd_jindex_mutex);
|
|
for (;;) {
|
struct gfs2_inode *jip;
|
|
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
|
if (error)
|
break;
|
|
name.len = sprintf(buf, "journal%u", sdp->sd_journals);
|
name.hash = gfs2_disk_hash(name.name, name.len);
|
|
error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
|
if (error == -ENOENT) {
|
error = 0;
|
break;
|
}
|
|
gfs2_glock_dq_uninit(ji_gh);
|
|
if (error)
|
break;
|
|
error = -ENOMEM;
|
jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
|
if (!jd)
|
break;
|
|
INIT_LIST_HEAD(&jd->extent_list);
|
INIT_LIST_HEAD(&jd->jd_revoke_list);
|
|
INIT_WORK(&jd->jd_work, gfs2_recover_func);
|
jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
|
if (IS_ERR_OR_NULL(jd->jd_inode)) {
|
if (!jd->jd_inode)
|
error = -ENOENT;
|
else
|
error = PTR_ERR(jd->jd_inode);
|
kfree(jd);
|
break;
|
}
|
|
spin_lock(&sdp->sd_jindex_spin);
|
jd->jd_jid = sdp->sd_journals++;
|
jip = GFS2_I(jd->jd_inode);
|
jd->jd_no_addr = jip->i_no_addr;
|
list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
|
spin_unlock(&sdp->sd_jindex_spin);
|
}
|
|
mutex_unlock(&sdp->sd_jindex_mutex);
|
|
return error;
|
}
|
|
/**
|
* init_statfs - look up and initialize master and local (per node) statfs inodes
|
* @sdp: The GFS2 superblock
|
*
|
* This should be called after the jindex is initialized in init_journal() and
|
* before gfs2_journal_recovery() is called because we need to be able to write
|
* to these inodes during recovery.
|
*
|
* Returns: errno
|
*/
|
static int init_statfs(struct gfs2_sbd *sdp)
|
{
|
int error = 0;
|
struct inode *master = d_inode(sdp->sd_master_dir);
|
struct inode *pn = NULL;
|
char buf[30];
|
struct gfs2_jdesc *jd;
|
struct gfs2_inode *ip;
|
|
sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
|
if (IS_ERR(sdp->sd_statfs_inode)) {
|
error = PTR_ERR(sdp->sd_statfs_inode);
|
fs_err(sdp, "can't read in statfs inode: %d\n", error);
|
goto out;
|
}
|
if (sdp->sd_args.ar_spectator)
|
goto out;
|
|
pn = gfs2_lookup_simple(master, "per_node");
|
if (IS_ERR(pn)) {
|
error = PTR_ERR(pn);
|
fs_err(sdp, "can't find per_node directory: %d\n", error);
|
goto put_statfs;
|
}
|
|
/* For each jid, lookup the corresponding local statfs inode in the
|
* per_node metafs directory and save it in the sdp->sd_sc_inodes_list. */
|
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
|
struct local_statfs_inode *lsi =
|
kmalloc(sizeof(struct local_statfs_inode), GFP_NOFS);
|
if (!lsi) {
|
error = -ENOMEM;
|
goto free_local;
|
}
|
sprintf(buf, "statfs_change%u", jd->jd_jid);
|
lsi->si_sc_inode = gfs2_lookup_simple(pn, buf);
|
if (IS_ERR(lsi->si_sc_inode)) {
|
error = PTR_ERR(lsi->si_sc_inode);
|
fs_err(sdp, "can't find local \"sc\" file#%u: %d\n",
|
jd->jd_jid, error);
|
kfree(lsi);
|
goto free_local;
|
}
|
lsi->si_jid = jd->jd_jid;
|
if (jd->jd_jid == sdp->sd_jdesc->jd_jid)
|
sdp->sd_sc_inode = lsi->si_sc_inode;
|
|
list_add_tail(&lsi->si_list, &sdp->sd_sc_inodes_list);
|
}
|
|
iput(pn);
|
pn = NULL;
|
ip = GFS2_I(sdp->sd_sc_inode);
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
|
&sdp->sd_sc_gh);
|
if (error) {
|
fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
|
goto free_local;
|
}
|
return 0;
|
|
free_local:
|
free_local_statfs_inodes(sdp);
|
iput(pn);
|
put_statfs:
|
iput(sdp->sd_statfs_inode);
|
out:
|
return error;
|
}
|
|
/* Uninitialize and free up memory used by the list of statfs inodes */
|
static void uninit_statfs(struct gfs2_sbd *sdp)
|
{
|
if (!sdp->sd_args.ar_spectator) {
|
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
|
free_local_statfs_inodes(sdp);
|
}
|
iput(sdp->sd_statfs_inode);
|
}
|
|
static int init_journal(struct gfs2_sbd *sdp, int undo)
|
{
|
struct inode *master = d_inode(sdp->sd_master_dir);
|
struct gfs2_holder ji_gh;
|
struct gfs2_inode *ip;
|
int jindex = 1;
|
int error = 0;
|
|
if (undo) {
|
jindex = 0;
|
goto fail_statfs;
|
}
|
|
sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
|
if (IS_ERR(sdp->sd_jindex)) {
|
fs_err(sdp, "can't lookup journal index: %d\n", error);
|
return PTR_ERR(sdp->sd_jindex);
|
}
|
|
/* Load in the journal index special file */
|
|
error = gfs2_jindex_hold(sdp, &ji_gh);
|
if (error) {
|
fs_err(sdp, "can't read journal index: %d\n", error);
|
goto fail;
|
}
|
|
error = -EUSERS;
|
if (!gfs2_jindex_size(sdp)) {
|
fs_err(sdp, "no journals!\n");
|
goto fail_jindex;
|
}
|
|
atomic_set(&sdp->sd_log_blks_needed, 0);
|
if (sdp->sd_args.ar_spectator) {
|
sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
|
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
|
atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
|
atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
|
} else {
|
if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
|
fs_err(sdp, "can't mount journal #%u\n",
|
sdp->sd_lockstruct.ls_jid);
|
fs_err(sdp, "there are only %u journals (0 - %u)\n",
|
gfs2_jindex_size(sdp),
|
gfs2_jindex_size(sdp) - 1);
|
goto fail_jindex;
|
}
|
sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
|
|
error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
|
&gfs2_journal_glops,
|
LM_ST_EXCLUSIVE,
|
LM_FLAG_NOEXP | GL_NOCACHE,
|
&sdp->sd_journal_gh);
|
if (error) {
|
fs_err(sdp, "can't acquire journal glock: %d\n", error);
|
goto fail_jindex;
|
}
|
|
ip = GFS2_I(sdp->sd_jdesc->jd_inode);
|
sdp->sd_jinode_gl = ip->i_gl;
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
|
LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
|
&sdp->sd_jinode_gh);
|
if (error) {
|
fs_err(sdp, "can't acquire journal inode glock: %d\n",
|
error);
|
goto fail_journal_gh;
|
}
|
|
error = gfs2_jdesc_check(sdp->sd_jdesc);
|
if (error) {
|
fs_err(sdp, "my journal (%u) is bad: %d\n",
|
sdp->sd_jdesc->jd_jid, error);
|
goto fail_jinode_gh;
|
}
|
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
|
atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
|
atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
|
|
/* Map the extents for this journal's blocks */
|
gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
|
}
|
trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
|
|
/* Lookup statfs inodes here so journal recovery can use them. */
|
error = init_statfs(sdp);
|
if (error)
|
goto fail_jinode_gh;
|
|
if (sdp->sd_lockstruct.ls_first) {
|
unsigned int x;
|
for (x = 0; x < sdp->sd_journals; x++) {
|
struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
|
|
if (sdp->sd_args.ar_spectator) {
|
error = check_journal_clean(sdp, jd, true);
|
if (error)
|
goto fail_statfs;
|
continue;
|
}
|
error = gfs2_recover_journal(jd, true);
|
if (error) {
|
fs_err(sdp, "error recovering journal %u: %d\n",
|
x, error);
|
goto fail_statfs;
|
}
|
}
|
|
gfs2_others_may_mount(sdp);
|
} else if (!sdp->sd_args.ar_spectator) {
|
error = gfs2_recover_journal(sdp->sd_jdesc, true);
|
if (error) {
|
fs_err(sdp, "error recovering my journal: %d\n", error);
|
goto fail_statfs;
|
}
|
}
|
|
sdp->sd_log_idle = 1;
|
set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
|
gfs2_glock_dq_uninit(&ji_gh);
|
jindex = 0;
|
INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
|
return 0;
|
|
fail_statfs:
|
uninit_statfs(sdp);
|
fail_jinode_gh:
|
/* A withdraw may have done dq/uninit so now we need to check it */
|
if (!sdp->sd_args.ar_spectator &&
|
gfs2_holder_initialized(&sdp->sd_jinode_gh))
|
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
|
fail_journal_gh:
|
if (!sdp->sd_args.ar_spectator &&
|
gfs2_holder_initialized(&sdp->sd_journal_gh))
|
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
|
fail_jindex:
|
gfs2_jindex_free(sdp);
|
if (jindex)
|
gfs2_glock_dq_uninit(&ji_gh);
|
fail:
|
iput(sdp->sd_jindex);
|
return error;
|
}
|
|
static struct lock_class_key gfs2_quota_imutex_key;
|
|
static int init_inodes(struct gfs2_sbd *sdp, int undo)
|
{
|
int error = 0;
|
struct inode *master = d_inode(sdp->sd_master_dir);
|
|
if (undo)
|
goto fail_qinode;
|
|
error = init_journal(sdp, undo);
|
complete_all(&sdp->sd_journal_ready);
|
if (error)
|
goto fail;
|
|
/* Read in the resource index inode */
|
sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
|
if (IS_ERR(sdp->sd_rindex)) {
|
error = PTR_ERR(sdp->sd_rindex);
|
fs_err(sdp, "can't get resource index inode: %d\n", error);
|
goto fail_journal;
|
}
|
sdp->sd_rindex_uptodate = 0;
|
|
/* Read in the quota inode */
|
sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
|
if (IS_ERR(sdp->sd_quota_inode)) {
|
error = PTR_ERR(sdp->sd_quota_inode);
|
fs_err(sdp, "can't get quota file inode: %d\n", error);
|
goto fail_rindex;
|
}
|
/*
|
* i_rwsem on quota files is special. Since this inode is hidden system
|
* file, we are safe to define locking ourselves.
|
*/
|
lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
|
&gfs2_quota_imutex_key);
|
|
error = gfs2_rindex_update(sdp);
|
if (error)
|
goto fail_qinode;
|
|
return 0;
|
|
fail_qinode:
|
iput(sdp->sd_quota_inode);
|
fail_rindex:
|
gfs2_clear_rgrpd(sdp);
|
iput(sdp->sd_rindex);
|
fail_journal:
|
init_journal(sdp, UNDO);
|
fail:
|
return error;
|
}
|
|
static int init_per_node(struct gfs2_sbd *sdp, int undo)
|
{
|
struct inode *pn = NULL;
|
char buf[30];
|
int error = 0;
|
struct gfs2_inode *ip;
|
struct inode *master = d_inode(sdp->sd_master_dir);
|
|
if (sdp->sd_args.ar_spectator)
|
return 0;
|
|
if (undo)
|
goto fail_qc_gh;
|
|
pn = gfs2_lookup_simple(master, "per_node");
|
if (IS_ERR(pn)) {
|
error = PTR_ERR(pn);
|
fs_err(sdp, "can't find per_node directory: %d\n", error);
|
return error;
|
}
|
|
sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
|
sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
|
if (IS_ERR(sdp->sd_qc_inode)) {
|
error = PTR_ERR(sdp->sd_qc_inode);
|
fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
|
goto fail_ut_i;
|
}
|
|
iput(pn);
|
pn = NULL;
|
|
ip = GFS2_I(sdp->sd_qc_inode);
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
|
&sdp->sd_qc_gh);
|
if (error) {
|
fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
|
goto fail_qc_i;
|
}
|
|
return 0;
|
|
fail_qc_gh:
|
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
|
fail_qc_i:
|
iput(sdp->sd_qc_inode);
|
fail_ut_i:
|
iput(pn);
|
return error;
|
}
|
|
static const match_table_t nolock_tokens = {
|
{ Opt_jid, "jid=%d", },
|
{ Opt_err, NULL },
|
};
|
|
static const struct lm_lockops nolock_ops = {
|
.lm_proto_name = "lock_nolock",
|
.lm_put_lock = gfs2_glock_free,
|
.lm_tokens = &nolock_tokens,
|
};
|
|
/**
|
* gfs2_lm_mount - mount a locking protocol
|
* @sdp: the filesystem
|
* @args: mount arguments
|
* @silent: if 1, don't complain if the FS isn't a GFS2 fs
|
*
|
* Returns: errno
|
*/
|
|
static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
|
{
|
const struct lm_lockops *lm;
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
struct gfs2_args *args = &sdp->sd_args;
|
const char *proto = sdp->sd_proto_name;
|
const char *table = sdp->sd_table_name;
|
char *o, *options;
|
int ret;
|
|
if (!strcmp("lock_nolock", proto)) {
|
lm = &nolock_ops;
|
sdp->sd_args.ar_localflocks = 1;
|
#ifdef CONFIG_GFS2_FS_LOCKING_DLM
|
} else if (!strcmp("lock_dlm", proto)) {
|
lm = &gfs2_dlm_ops;
|
#endif
|
} else {
|
pr_info("can't find protocol %s\n", proto);
|
return -ENOENT;
|
}
|
|
fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
|
|
ls->ls_ops = lm;
|
ls->ls_first = 1;
|
|
for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
|
substring_t tmp[MAX_OPT_ARGS];
|
int token, option;
|
|
if (!o || !*o)
|
continue;
|
|
token = match_token(o, *lm->lm_tokens, tmp);
|
switch (token) {
|
case Opt_jid:
|
ret = match_int(&tmp[0], &option);
|
if (ret || option < 0)
|
goto hostdata_error;
|
if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
|
ls->ls_jid = option;
|
break;
|
case Opt_id:
|
case Opt_nodir:
|
/* Obsolete, but left for backward compat purposes */
|
break;
|
case Opt_first:
|
ret = match_int(&tmp[0], &option);
|
if (ret || (option != 0 && option != 1))
|
goto hostdata_error;
|
ls->ls_first = option;
|
break;
|
case Opt_err:
|
default:
|
hostdata_error:
|
fs_info(sdp, "unknown hostdata (%s)\n", o);
|
return -EINVAL;
|
}
|
}
|
|
if (lm->lm_mount == NULL) {
|
fs_info(sdp, "Now mounting FS...\n");
|
complete_all(&sdp->sd_locking_init);
|
return 0;
|
}
|
ret = lm->lm_mount(sdp, table);
|
if (ret == 0)
|
fs_info(sdp, "Joined cluster. Now mounting FS...\n");
|
complete_all(&sdp->sd_locking_init);
|
return ret;
|
}
|
|
void gfs2_lm_unmount(struct gfs2_sbd *sdp)
|
{
|
const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
|
if (likely(!gfs2_withdrawn(sdp)) && lm->lm_unmount)
|
lm->lm_unmount(sdp);
|
}
|
|
static int wait_on_journal(struct gfs2_sbd *sdp)
|
{
|
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
|
return 0;
|
|
return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
|
? -EINTR : 0;
|
}
|
|
void gfs2_online_uevent(struct gfs2_sbd *sdp)
|
{
|
struct super_block *sb = sdp->sd_vfs;
|
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);
|
kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
|
}
|
|
static int init_threads(struct gfs2_sbd *sdp)
|
{
|
struct task_struct *p;
|
int error = 0;
|
|
p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
|
if (IS_ERR(p)) {
|
error = PTR_ERR(p);
|
fs_err(sdp, "can't start logd thread: %d\n", error);
|
return error;
|
}
|
sdp->sd_logd_process = p;
|
|
p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
|
if (IS_ERR(p)) {
|
error = PTR_ERR(p);
|
fs_err(sdp, "can't start quotad thread: %d\n", error);
|
goto fail;
|
}
|
sdp->sd_quotad_process = p;
|
return 0;
|
|
fail:
|
kthread_stop(sdp->sd_logd_process);
|
sdp->sd_logd_process = NULL;
|
return error;
|
}
|
|
/**
|
* gfs2_fill_super - Read in superblock
|
* @sb: The VFS superblock
|
* @args: Mount options
|
* @silent: Don't complain if it's not a GFS2 filesystem
|
*
|
* Returns: -errno
|
*/
|
static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
|
{
|
struct gfs2_args *args = fc->fs_private;
|
int silent = fc->sb_flags & SB_SILENT;
|
struct gfs2_sbd *sdp;
|
struct gfs2_holder mount_gh;
|
struct gfs2_holder freeze_gh;
|
int error;
|
|
sdp = init_sbd(sb);
|
if (!sdp) {
|
pr_warn("can't alloc struct gfs2_sbd\n");
|
return -ENOMEM;
|
}
|
sdp->sd_args = *args;
|
|
if (sdp->sd_args.ar_spectator) {
|
sb->s_flags |= SB_RDONLY;
|
set_bit(SDF_RORECOVERY, &sdp->sd_flags);
|
}
|
if (sdp->sd_args.ar_posix_acl)
|
sb->s_flags |= SB_POSIXACL;
|
if (sdp->sd_args.ar_nobarrier)
|
set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
|
|
sb->s_flags |= SB_NOSEC;
|
sb->s_magic = GFS2_MAGIC;
|
sb->s_op = &gfs2_super_ops;
|
sb->s_d_op = &gfs2_dops;
|
sb->s_export_op = &gfs2_export_ops;
|
sb->s_xattr = gfs2_xattr_handlers;
|
sb->s_qcop = &gfs2_quotactl_ops;
|
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
|
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
|
sb->s_time_gran = 1;
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
|
/* Set up the buffer cache and fill in some fake block size values
|
to allow us to read-in the on-disk superblock. */
|
sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
|
sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
|
sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
|
GFS2_BASIC_BLOCK_SHIFT;
|
sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
|
|
sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
|
sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
|
if (sdp->sd_args.ar_statfs_quantum) {
|
sdp->sd_tune.gt_statfs_slow = 0;
|
sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
|
} else {
|
sdp->sd_tune.gt_statfs_slow = 1;
|
sdp->sd_tune.gt_statfs_quantum = 30;
|
}
|
|
error = init_names(sdp, silent);
|
if (error)
|
goto fail_free;
|
|
snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
|
|
error = gfs2_sys_fs_add(sdp);
|
if (error)
|
goto fail_free;
|
|
gfs2_create_debugfs_file(sdp);
|
|
error = gfs2_lm_mount(sdp, silent);
|
if (error)
|
goto fail_debug;
|
|
error = init_locking(sdp, &mount_gh, DO);
|
if (error)
|
goto fail_lm;
|
|
error = init_sb(sdp, silent);
|
if (error)
|
goto fail_locking;
|
|
error = wait_on_journal(sdp);
|
if (error)
|
goto fail_sb;
|
|
/*
|
* If user space has failed to join the cluster or some similar
|
* failure has occurred, then the journal id will contain a
|
* negative (error) number. This will then be returned to the
|
* caller (of the mount syscall). We do this even for spectator
|
* mounts (which just write a jid of 0 to indicate "ok" even though
|
* the jid is unused in the spectator case)
|
*/
|
if (sdp->sd_lockstruct.ls_jid < 0) {
|
error = sdp->sd_lockstruct.ls_jid;
|
sdp->sd_lockstruct.ls_jid = 0;
|
goto fail_sb;
|
}
|
|
if (sdp->sd_args.ar_spectator)
|
snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s",
|
sdp->sd_table_name);
|
else
|
snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u",
|
sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
|
|
error = init_inodes(sdp, DO);
|
if (error)
|
goto fail_sb;
|
|
error = init_per_node(sdp, DO);
|
if (error)
|
goto fail_inodes;
|
|
error = gfs2_statfs_init(sdp);
|
if (error) {
|
fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
|
goto fail_per_node;
|
}
|
|
if (!sb_rdonly(sb)) {
|
error = init_threads(sdp);
|
if (error) {
|
gfs2_withdraw_delayed(sdp);
|
goto fail_per_node;
|
}
|
}
|
|
error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
|
if (error)
|
goto fail_per_node;
|
|
if (!sb_rdonly(sb))
|
error = gfs2_make_fs_rw(sdp);
|
|
gfs2_freeze_unlock(&freeze_gh);
|
if (error) {
|
if (sdp->sd_quotad_process)
|
kthread_stop(sdp->sd_quotad_process);
|
sdp->sd_quotad_process = NULL;
|
if (sdp->sd_logd_process)
|
kthread_stop(sdp->sd_logd_process);
|
sdp->sd_logd_process = NULL;
|
fs_err(sdp, "can't make FS RW: %d\n", error);
|
goto fail_per_node;
|
}
|
gfs2_glock_dq_uninit(&mount_gh);
|
gfs2_online_uevent(sdp);
|
return 0;
|
|
fail_per_node:
|
init_per_node(sdp, UNDO);
|
fail_inodes:
|
init_inodes(sdp, UNDO);
|
fail_sb:
|
if (sdp->sd_root_dir)
|
dput(sdp->sd_root_dir);
|
if (sdp->sd_master_dir)
|
dput(sdp->sd_master_dir);
|
if (sb->s_root)
|
dput(sb->s_root);
|
sb->s_root = NULL;
|
fail_locking:
|
init_locking(sdp, &mount_gh, UNDO);
|
fail_lm:
|
complete_all(&sdp->sd_journal_ready);
|
gfs2_gl_hash_clear(sdp);
|
gfs2_lm_unmount(sdp);
|
fail_debug:
|
gfs2_delete_debugfs_file(sdp);
|
gfs2_sys_fs_del(sdp);
|
fail_free:
|
free_sbd(sdp);
|
sb->s_fs_info = NULL;
|
return error;
|
}
|
|
/**
|
* gfs2_get_tree - Get the GFS2 superblock and root directory
|
* @fc: The filesystem context
|
*
|
* Returns: 0 or -errno on error
|
*/
|
static int gfs2_get_tree(struct fs_context *fc)
|
{
|
struct gfs2_args *args = fc->fs_private;
|
struct gfs2_sbd *sdp;
|
int error;
|
|
error = get_tree_bdev(fc, gfs2_fill_super);
|
if (error)
|
return error;
|
|
sdp = fc->root->d_sb->s_fs_info;
|
dput(fc->root);
|
if (args->ar_meta)
|
fc->root = dget(sdp->sd_master_dir);
|
else
|
fc->root = dget(sdp->sd_root_dir);
|
return 0;
|
}
|
|
static void gfs2_fc_free(struct fs_context *fc)
|
{
|
struct gfs2_args *args = fc->fs_private;
|
|
kfree(args);
|
}
|
|
enum gfs2_param {
|
Opt_lockproto,
|
Opt_locktable,
|
Opt_hostdata,
|
Opt_spectator,
|
Opt_ignore_local_fs,
|
Opt_localflocks,
|
Opt_localcaching,
|
Opt_debug,
|
Opt_upgrade,
|
Opt_acl,
|
Opt_quota,
|
Opt_quota_flag,
|
Opt_suiddir,
|
Opt_data,
|
Opt_meta,
|
Opt_discard,
|
Opt_commit,
|
Opt_errors,
|
Opt_statfs_quantum,
|
Opt_statfs_percent,
|
Opt_quota_quantum,
|
Opt_barrier,
|
Opt_rgrplvb,
|
Opt_loccookie,
|
};
|
|
static const struct constant_table gfs2_param_quota[] = {
|
{"off", GFS2_QUOTA_OFF},
|
{"account", GFS2_QUOTA_ACCOUNT},
|
{"on", GFS2_QUOTA_ON},
|
{}
|
};
|
|
enum opt_data {
|
Opt_data_writeback = GFS2_DATA_WRITEBACK,
|
Opt_data_ordered = GFS2_DATA_ORDERED,
|
};
|
|
static const struct constant_table gfs2_param_data[] = {
|
{"writeback", Opt_data_writeback },
|
{"ordered", Opt_data_ordered },
|
{}
|
};
|
|
enum opt_errors {
|
Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
|
Opt_errors_panic = GFS2_ERRORS_PANIC,
|
};
|
|
static const struct constant_table gfs2_param_errors[] = {
|
{"withdraw", Opt_errors_withdraw },
|
{"panic", Opt_errors_panic },
|
{}
|
};
|
|
static const struct fs_parameter_spec gfs2_fs_parameters[] = {
|
fsparam_string ("lockproto", Opt_lockproto),
|
fsparam_string ("locktable", Opt_locktable),
|
fsparam_string ("hostdata", Opt_hostdata),
|
fsparam_flag ("spectator", Opt_spectator),
|
fsparam_flag ("norecovery", Opt_spectator),
|
fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
|
fsparam_flag ("localflocks", Opt_localflocks),
|
fsparam_flag ("localcaching", Opt_localcaching),
|
fsparam_flag_no("debug", Opt_debug),
|
fsparam_flag ("upgrade", Opt_upgrade),
|
fsparam_flag_no("acl", Opt_acl),
|
fsparam_flag_no("suiddir", Opt_suiddir),
|
fsparam_enum ("data", Opt_data, gfs2_param_data),
|
fsparam_flag ("meta", Opt_meta),
|
fsparam_flag_no("discard", Opt_discard),
|
fsparam_s32 ("commit", Opt_commit),
|
fsparam_enum ("errors", Opt_errors, gfs2_param_errors),
|
fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
|
fsparam_s32 ("statfs_percent", Opt_statfs_percent),
|
fsparam_s32 ("quota_quantum", Opt_quota_quantum),
|
fsparam_flag_no("barrier", Opt_barrier),
|
fsparam_flag_no("rgrplvb", Opt_rgrplvb),
|
fsparam_flag_no("loccookie", Opt_loccookie),
|
/* quota can be a flag or an enum so it gets special treatment */
|
fsparam_flag_no("quota", Opt_quota_flag),
|
fsparam_enum("quota", Opt_quota, gfs2_param_quota),
|
{}
|
};
|
|
/* Parse a single mount parameter */
|
static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
|
{
|
struct gfs2_args *args = fc->fs_private;
|
struct fs_parse_result result;
|
int o;
|
|
o = fs_parse(fc, gfs2_fs_parameters, param, &result);
|
if (o < 0)
|
return o;
|
|
switch (o) {
|
case Opt_lockproto:
|
strscpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
|
break;
|
case Opt_locktable:
|
strscpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
|
break;
|
case Opt_hostdata:
|
strscpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
|
break;
|
case Opt_spectator:
|
args->ar_spectator = 1;
|
break;
|
case Opt_ignore_local_fs:
|
/* Retained for backwards compat only */
|
break;
|
case Opt_localflocks:
|
args->ar_localflocks = 1;
|
break;
|
case Opt_localcaching:
|
/* Retained for backwards compat only */
|
break;
|
case Opt_debug:
|
if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
|
return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
|
args->ar_debug = result.boolean;
|
break;
|
case Opt_upgrade:
|
/* Retained for backwards compat only */
|
break;
|
case Opt_acl:
|
args->ar_posix_acl = result.boolean;
|
break;
|
case Opt_quota_flag:
|
args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON;
|
break;
|
case Opt_quota:
|
args->ar_quota = result.int_32;
|
break;
|
case Opt_suiddir:
|
args->ar_suiddir = result.boolean;
|
break;
|
case Opt_data:
|
/* The uint_32 result maps directly to GFS2_DATA_* */
|
args->ar_data = result.uint_32;
|
break;
|
case Opt_meta:
|
args->ar_meta = 1;
|
break;
|
case Opt_discard:
|
args->ar_discard = result.boolean;
|
break;
|
case Opt_commit:
|
if (result.int_32 <= 0)
|
return invalfc(fc, "commit mount option requires a positive numeric argument");
|
args->ar_commit = result.int_32;
|
break;
|
case Opt_statfs_quantum:
|
if (result.int_32 < 0)
|
return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument");
|
args->ar_statfs_quantum = result.int_32;
|
break;
|
case Opt_quota_quantum:
|
if (result.int_32 <= 0)
|
return invalfc(fc, "quota_quantum mount option requires a positive numeric argument");
|
args->ar_quota_quantum = result.int_32;
|
break;
|
case Opt_statfs_percent:
|
if (result.int_32 < 0 || result.int_32 > 100)
|
return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100");
|
args->ar_statfs_percent = result.int_32;
|
break;
|
case Opt_errors:
|
if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
|
return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
|
args->ar_errors = result.uint_32;
|
break;
|
case Opt_barrier:
|
args->ar_nobarrier = result.boolean;
|
break;
|
case Opt_rgrplvb:
|
args->ar_rgrplvb = result.boolean;
|
break;
|
case Opt_loccookie:
|
args->ar_loccookie = result.boolean;
|
break;
|
default:
|
return invalfc(fc, "invalid mount option: %s", param->key);
|
}
|
return 0;
|
}
|
|
static int gfs2_reconfigure(struct fs_context *fc)
|
{
|
struct super_block *sb = fc->root->d_sb;
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
struct gfs2_args *oldargs = &sdp->sd_args;
|
struct gfs2_args *newargs = fc->fs_private;
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
int error = 0;
|
|
sync_filesystem(sb);
|
|
spin_lock(>->gt_spin);
|
oldargs->ar_commit = gt->gt_logd_secs;
|
oldargs->ar_quota_quantum = gt->gt_quota_quantum;
|
if (gt->gt_statfs_slow)
|
oldargs->ar_statfs_quantum = 0;
|
else
|
oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
|
spin_unlock(>->gt_spin);
|
|
if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
|
errorfc(fc, "reconfiguration of locking protocol not allowed");
|
return -EINVAL;
|
}
|
if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
|
errorfc(fc, "reconfiguration of lock table not allowed");
|
return -EINVAL;
|
}
|
if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
|
errorfc(fc, "reconfiguration of host data not allowed");
|
return -EINVAL;
|
}
|
if (newargs->ar_spectator != oldargs->ar_spectator) {
|
errorfc(fc, "reconfiguration of spectator mode not allowed");
|
return -EINVAL;
|
}
|
if (newargs->ar_localflocks != oldargs->ar_localflocks) {
|
errorfc(fc, "reconfiguration of localflocks not allowed");
|
return -EINVAL;
|
}
|
if (newargs->ar_meta != oldargs->ar_meta) {
|
errorfc(fc, "switching between gfs2 and gfs2meta not allowed");
|
return -EINVAL;
|
}
|
if (oldargs->ar_spectator)
|
fc->sb_flags |= SB_RDONLY;
|
|
if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
|
struct gfs2_holder freeze_gh;
|
|
error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
|
if (error)
|
return -EINVAL;
|
|
if (fc->sb_flags & SB_RDONLY) {
|
error = gfs2_make_fs_ro(sdp);
|
if (error)
|
errorfc(fc, "unable to remount read-only");
|
} else {
|
error = gfs2_make_fs_rw(sdp);
|
if (error)
|
errorfc(fc, "unable to remount read-write");
|
}
|
gfs2_freeze_unlock(&freeze_gh);
|
}
|
sdp->sd_args = *newargs;
|
|
if (sdp->sd_args.ar_posix_acl)
|
sb->s_flags |= SB_POSIXACL;
|
else
|
sb->s_flags &= ~SB_POSIXACL;
|
if (sdp->sd_args.ar_nobarrier)
|
set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
|
else
|
clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
|
spin_lock(>->gt_spin);
|
gt->gt_logd_secs = newargs->ar_commit;
|
gt->gt_quota_quantum = newargs->ar_quota_quantum;
|
if (newargs->ar_statfs_quantum) {
|
gt->gt_statfs_slow = 0;
|
gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
|
}
|
else {
|
gt->gt_statfs_slow = 1;
|
gt->gt_statfs_quantum = 30;
|
}
|
spin_unlock(>->gt_spin);
|
|
gfs2_online_uevent(sdp);
|
return error;
|
}
|
|
static const struct fs_context_operations gfs2_context_ops = {
|
.free = gfs2_fc_free,
|
.parse_param = gfs2_parse_param,
|
.get_tree = gfs2_get_tree,
|
.reconfigure = gfs2_reconfigure,
|
};
|
|
/* Set up the filesystem mount context */
|
static int gfs2_init_fs_context(struct fs_context *fc)
|
{
|
struct gfs2_args *args;
|
|
args = kmalloc(sizeof(*args), GFP_KERNEL);
|
if (args == NULL)
|
return -ENOMEM;
|
|
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
|
struct gfs2_sbd *sdp = fc->root->d_sb->s_fs_info;
|
|
*args = sdp->sd_args;
|
} else {
|
memset(args, 0, sizeof(*args));
|
args->ar_quota = GFS2_QUOTA_DEFAULT;
|
args->ar_data = GFS2_DATA_DEFAULT;
|
args->ar_commit = 30;
|
args->ar_statfs_quantum = 30;
|
args->ar_quota_quantum = 60;
|
args->ar_errors = GFS2_ERRORS_DEFAULT;
|
}
|
fc->fs_private = args;
|
fc->ops = &gfs2_context_ops;
|
return 0;
|
}
|
|
static int set_meta_super(struct super_block *s, struct fs_context *fc)
|
{
|
return -EINVAL;
|
}
|
|
static int test_meta_super(struct super_block *s, struct fs_context *fc)
|
{
|
return (fc->sget_key == s->s_bdev);
|
}
|
|
static int gfs2_meta_get_tree(struct fs_context *fc)
|
{
|
struct super_block *s;
|
struct gfs2_sbd *sdp;
|
struct path path;
|
int error;
|
|
if (!fc->source || !*fc->source)
|
return -EINVAL;
|
|
error = kern_path(fc->source, LOOKUP_FOLLOW, &path);
|
if (error) {
|
pr_warn("path_lookup on %s returned error %d\n",
|
fc->source, error);
|
return error;
|
}
|
fc->fs_type = &gfs2_fs_type;
|
fc->sget_key = path.dentry->d_sb->s_bdev;
|
s = sget_fc(fc, test_meta_super, set_meta_super);
|
path_put(&path);
|
if (IS_ERR(s)) {
|
pr_warn("gfs2 mount does not exist\n");
|
return PTR_ERR(s);
|
}
|
if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
|
deactivate_locked_super(s);
|
return -EBUSY;
|
}
|
sdp = s->s_fs_info;
|
fc->root = dget(sdp->sd_master_dir);
|
return 0;
|
}
|
|
static const struct fs_context_operations gfs2_meta_context_ops = {
|
.free = gfs2_fc_free,
|
.get_tree = gfs2_meta_get_tree,
|
};
|
|
static int gfs2_meta_init_fs_context(struct fs_context *fc)
|
{
|
int ret = gfs2_init_fs_context(fc);
|
|
if (ret)
|
return ret;
|
|
fc->ops = &gfs2_meta_context_ops;
|
return 0;
|
}
|
|
static void gfs2_kill_sb(struct super_block *sb)
|
{
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
if (sdp == NULL) {
|
kill_block_super(sb);
|
return;
|
}
|
|
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB);
|
dput(sdp->sd_root_dir);
|
dput(sdp->sd_master_dir);
|
sdp->sd_root_dir = NULL;
|
sdp->sd_master_dir = NULL;
|
shrink_dcache_sb(sb);
|
kill_block_super(sb);
|
}
|
|
struct file_system_type gfs2_fs_type = {
|
.name = "gfs2",
|
.fs_flags = FS_REQUIRES_DEV,
|
.init_fs_context = gfs2_init_fs_context,
|
.parameters = gfs2_fs_parameters,
|
.kill_sb = gfs2_kill_sb,
|
.owner = THIS_MODULE,
|
};
|
MODULE_ALIAS_FS("gfs2");
|
|
struct file_system_type gfs2meta_fs_type = {
|
.name = "gfs2meta",
|
.fs_flags = FS_REQUIRES_DEV,
|
.init_fs_context = gfs2_meta_init_fs_context,
|
.owner = THIS_MODULE,
|
};
|
MODULE_ALIAS_FS("gfs2meta");
|
