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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Linus Torvalds](/assets/img/avatar_default.png)
Pull vfs file system parameter updates from Al Viro: "Saner fs_parser.c guts and data structures. The system-wide registry of syntax types (string/enum/int32/oct32/.../etc.) is gone and so is the horror switch() in fs_parse() that would have to grow another case every time something got added to that system-wide registry. New syntax types can be added by filesystems easily now, and their namespace is that of functions - not of system-wide enum members. IOW, they can be shared or kept private and if some turn out to be widely useful, we can make them common library helpers, etc., without having to do anything whatsoever to fs_parse() itself. And we already get that kind of requests - the thing that finally pushed me into doing that was "oh, and let's add one for timeouts - things like 15s or 2h". If some filesystem really wants that, let them do it. Without somebody having to play gatekeeper for the variants blessed by direct support in fs_parse(), TYVM. Quite a bit of boilerplate is gone. And IMO the data structures make a lot more sense now. -200LoC, while we are at it" * 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (25 commits) tmpfs: switch to use of invalfc() cgroup1: switch to use of errorfc() et.al. procfs: switch to use of invalfc() hugetlbfs: switch to use of invalfc() cramfs: switch to use of errofc() et.al. gfs2: switch to use of errorfc() et.al. fuse: switch to use errorfc() et.al. ceph: use errorfc() and friends instead of spelling the prefix out prefix-handling analogues of errorf() and friends turn fs_param_is_... into functions fs_parse: handle optional arguments sanely fs_parse: fold fs_parameter_desc/fs_parameter_spec fs_parser: remove fs_parameter_description name field add prefix to fs_context->log ceph_parse_param(), ceph_parse_mon_ips(): switch to passing fc_log new primitive: __fs_parse() switch rbd and libceph to p_log-based primitives struct p_log, variants of warnf() et.al. taking that one instead teach logfc() to handle prefices, give it saner calling conventions get rid of cg_invalf() ...
1644 lines
42 KiB
C
1644 lines
42 KiB
C
// 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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*/
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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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{
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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)
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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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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 format numbers match exactly, we're done. */
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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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return 0;
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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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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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*/
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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 -
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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 -
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sizeof(struct gfs2_meta_header))
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* GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
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/* Compute maximum reservation required to add a entry to a directory */
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hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH),
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sdp->sd_jbsize);
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ind_blocks = 0;
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for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
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tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
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ind_blocks += tmp_blocks;
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}
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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);
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sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
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for (x = 2;; x++) {
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u64 space, d;
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u32 m;
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space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
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d = space;
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m = do_div(d, sdp->sd_inptrs);
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if (d != sdp->sd_heightsize[x - 1] || m)
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break;
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sdp->sd_heightsize[x] = space;
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}
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sdp->sd_max_height = x;
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sdp->sd_heightsize[x] = ~0;
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gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
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sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
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sizeof(struct gfs2_leaf)) /
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GFS2_MIN_DIRENT_SIZE;
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return 0;
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}
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|
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static int init_names(struct gfs2_sbd *sdp, int silent)
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{
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char *proto, *table;
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int error = 0;
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proto = sdp->sd_args.ar_lockproto;
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table = sdp->sd_args.ar_locktable;
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|
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/* Try to autodetect */
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if (!proto[0] || !table[0]) {
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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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return error;
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|
|
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if (!proto[0])
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proto = sdp->sd_sb.sb_lockproto;
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if (!table[0])
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table = sdp->sd_sb.sb_locktable;
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}
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|
|
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if (!table[0])
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table = sdp->sd_vfs->s_id;
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|
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strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
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strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
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|
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table = sdp->sd_table_name;
|
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while ((table = strchr(table, '/')))
|
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*table = '_';
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|
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return error;
|
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}
|
|
|
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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,
|
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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,
|
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GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
|
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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 (;;) {
|
|
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++;
|
|
list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
}
|
|
|
|
mutex_unlock(&sdp->sd_jindex_mutex);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* check_journal_clean - Make sure a journal is clean for a spectator mount
|
|
* @sdp: The GFS2 superblock
|
|
* @jd: The journal descriptor
|
|
*
|
|
* Returns: 0 if the journal is clean or locked, else an error
|
|
*/
|
|
static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
|
|
{
|
|
int error;
|
|
struct gfs2_holder j_gh;
|
|
struct gfs2_log_header_host head;
|
|
struct gfs2_inode *ip;
|
|
|
|
ip = GFS2_I(jd->jd_inode);
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
|
|
GL_EXACT | GL_NOCACHE, &j_gh);
|
|
if (error) {
|
|
fs_err(sdp, "Error locking journal for spectator mount.\n");
|
|
return -EPERM;
|
|
}
|
|
error = gfs2_jdesc_check(jd);
|
|
if (error) {
|
|
fs_err(sdp, "Error checking journal for spectator mount.\n");
|
|
goto out_unlock;
|
|
}
|
|
error = gfs2_find_jhead(jd, &head, false);
|
|
if (error) {
|
|
fs_err(sdp, "Error parsing journal for spectator mount.\n");
|
|
goto out_unlock;
|
|
}
|
|
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
|
|
error = -EPERM;
|
|
fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
|
|
"must not be a spectator.\n", jd->jd_jid);
|
|
}
|
|
|
|
out_unlock:
|
|
gfs2_glock_dq_uninit(&j_gh);
|
|
return error;
|
|
}
|
|
|
|
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_jinode_gh;
|
|
}
|
|
|
|
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,
|
|
&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);
|
|
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));
|
|
|
|
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);
|
|
if (error)
|
|
goto fail_jinode_gh;
|
|
continue;
|
|
}
|
|
error = gfs2_recover_journal(jd, true);
|
|
if (error) {
|
|
fs_err(sdp, "error recovering journal %u: %d\n",
|
|
x, error);
|
|
goto fail_jinode_gh;
|
|
}
|
|
}
|
|
|
|
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_jinode_gh;
|
|
}
|
|
}
|
|
|
|
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_jinode_gh:
|
|
if (!sdp->sd_args.ar_spectator)
|
|
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
|
|
fail_journal_gh:
|
|
if (!sdp->sd_args.ar_spectator)
|
|
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 master statfs inode */
|
|
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 fail_journal;
|
|
}
|
|
|
|
/* 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_statfs;
|
|
}
|
|
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_statfs:
|
|
iput(sdp->sd_statfs_inode);
|
|
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, "statfs_change%u", sdp->sd_jdesc->jd_jid);
|
|
sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
|
|
if (IS_ERR(sdp->sd_sc_inode)) {
|
|
error = PTR_ERR(sdp->sd_sc_inode);
|
|
fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
|
|
goto fail;
|
|
}
|
|
|
|
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_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 fail_qc_i;
|
|
}
|
|
|
|
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_ut_gh;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail_qc_gh:
|
|
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
|
|
fail_ut_gh:
|
|
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
|
|
fail_qc_i:
|
|
iput(sdp->sd_qc_inode);
|
|
fail_ut_i:
|
|
iput(sdp->sd_sc_inode);
|
|
fail:
|
|
iput(pn);
|
|
return error;
|
|
}
|
|
|
|
static const match_table_t nolock_tokens = {
|
|
{ Opt_jid, "jid=%d\n", },
|
|
{ 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);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
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) {
|
|
/* In this case, we haven't initialized sysfs, so we have to
|
|
manually free the sdp. */
|
|
free_sbd(sdp);
|
|
sb->s_fs_info = NULL;
|
|
return error;
|
|
}
|
|
|
|
snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
|
|
|
|
error = gfs2_sys_fs_add(sdp);
|
|
/*
|
|
* If we hit an error here, gfs2_sys_fs_add will have called function
|
|
* kobject_put which causes the sysfs usage count to go to zero, which
|
|
* causes sysfs to call function gfs2_sbd_release, which frees sdp.
|
|
* Subsequent error paths here will call gfs2_sys_fs_del, which also
|
|
* kobject_put to free sdp.
|
|
*/
|
|
if (error)
|
|
return error;
|
|
|
|
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 = gfs2_make_fs_rw(sdp);
|
|
if (error) {
|
|
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 must be the last thing we do, since it causes
|
|
* sysfs to call function gfs2_sbd_release, which frees sdp. */
|
|
gfs2_sys_fs_del(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:
|
|
strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
|
|
break;
|
|
case Opt_locktable:
|
|
strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
|
|
break;
|
|
case Opt_hostdata:
|
|
strlcpy(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) {
|
|
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");
|
|
}
|
|
}
|
|
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");
|