![Josef 'Jeff' Sipek](/assets/img/avatar_default.png)
This patch is inspired by Arjan's "Patch series to mark struct file_operations and struct inode_operations const". Compile tested with gcc & sparse. Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1761 lines
43 KiB
C
1761 lines
43 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* super.c
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*
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* load/unload driver, mount/dismount volumes
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/utsname.h>
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#include <linux/init.h>
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#include <linux/random.h>
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#include <linux/statfs.h>
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#include <linux/moduleparam.h>
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#include <linux/blkdev.h>
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#include <linux/socket.h>
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#include <linux/inet.h>
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#include <linux/parser.h>
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#include <linux/crc32.h>
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#include <linux/debugfs.h>
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#include <cluster/nodemanager.h>
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#define MLOG_MASK_PREFIX ML_SUPER
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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/* this should be the only file to include a version 1 header */
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#include "ocfs1_fs_compat.h"
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#include "alloc.h"
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#include "dlmglue.h"
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#include "export.h"
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#include "extent_map.h"
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#include "heartbeat.h"
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#include "inode.h"
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#include "journal.h"
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#include "localalloc.h"
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#include "namei.h"
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#include "slot_map.h"
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#include "super.h"
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#include "sysfile.h"
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#include "uptodate.h"
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#include "ver.h"
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#include "vote.h"
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#include "buffer_head_io.h"
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static struct kmem_cache *ocfs2_inode_cachep = NULL;
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/* OCFS2 needs to schedule several differnt types of work which
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* require cluster locking, disk I/O, recovery waits, etc. Since these
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* types of work tend to be heavy we avoid using the kernel events
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* workqueue and schedule on our own. */
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struct workqueue_struct *ocfs2_wq = NULL;
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static struct dentry *ocfs2_debugfs_root = NULL;
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MODULE_AUTHOR("Oracle");
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MODULE_LICENSE("GPL");
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static int ocfs2_parse_options(struct super_block *sb, char *options,
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unsigned long *mount_opt, int is_remount);
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static void ocfs2_put_super(struct super_block *sb);
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static int ocfs2_mount_volume(struct super_block *sb);
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static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
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static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
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static int ocfs2_initialize_mem_caches(void);
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static void ocfs2_free_mem_caches(void);
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static void ocfs2_delete_osb(struct ocfs2_super *osb);
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static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
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static int ocfs2_sync_fs(struct super_block *sb, int wait);
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static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
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static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
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static int ocfs2_release_system_inodes(struct ocfs2_super *osb);
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static int ocfs2_fill_local_node_info(struct ocfs2_super *osb);
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static int ocfs2_check_volume(struct ocfs2_super *osb);
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static int ocfs2_verify_volume(struct ocfs2_dinode *di,
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struct buffer_head *bh,
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u32 sectsize);
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static int ocfs2_initialize_super(struct super_block *sb,
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struct buffer_head *bh,
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int sector_size);
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static int ocfs2_get_sector(struct super_block *sb,
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struct buffer_head **bh,
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int block,
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int sect_size);
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static void ocfs2_write_super(struct super_block *sb);
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static struct inode *ocfs2_alloc_inode(struct super_block *sb);
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static void ocfs2_destroy_inode(struct inode *inode);
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static unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
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static const struct super_operations ocfs2_sops = {
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.statfs = ocfs2_statfs,
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.alloc_inode = ocfs2_alloc_inode,
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.destroy_inode = ocfs2_destroy_inode,
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.drop_inode = ocfs2_drop_inode,
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.clear_inode = ocfs2_clear_inode,
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.delete_inode = ocfs2_delete_inode,
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.sync_fs = ocfs2_sync_fs,
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.write_super = ocfs2_write_super,
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.put_super = ocfs2_put_super,
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.remount_fs = ocfs2_remount,
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};
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enum {
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Opt_barrier,
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Opt_err_panic,
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Opt_err_ro,
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Opt_intr,
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Opt_nointr,
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Opt_hb_none,
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Opt_hb_local,
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Opt_data_ordered,
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Opt_data_writeback,
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Opt_atime_quantum,
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Opt_err,
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};
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static match_table_t tokens = {
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{Opt_barrier, "barrier=%u"},
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{Opt_err_panic, "errors=panic"},
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{Opt_err_ro, "errors=remount-ro"},
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{Opt_intr, "intr"},
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{Opt_nointr, "nointr"},
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{Opt_hb_none, OCFS2_HB_NONE},
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{Opt_hb_local, OCFS2_HB_LOCAL},
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{Opt_data_ordered, "data=ordered"},
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{Opt_data_writeback, "data=writeback"},
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{Opt_atime_quantum, "atime_quantum=%u"},
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{Opt_err, NULL}
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};
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/*
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* write_super and sync_fs ripped right out of ext3.
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*/
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static void ocfs2_write_super(struct super_block *sb)
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{
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if (mutex_trylock(&sb->s_lock) != 0)
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BUG();
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sb->s_dirt = 0;
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}
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static int ocfs2_sync_fs(struct super_block *sb, int wait)
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{
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int status = 0;
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tid_t target;
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struct ocfs2_super *osb = OCFS2_SB(sb);
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sb->s_dirt = 0;
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if (ocfs2_is_hard_readonly(osb))
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return -EROFS;
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if (wait) {
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status = ocfs2_flush_truncate_log(osb);
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if (status < 0)
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mlog_errno(status);
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} else {
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ocfs2_schedule_truncate_log_flush(osb, 0);
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}
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if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
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if (wait)
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log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
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target);
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}
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return 0;
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}
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static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
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{
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struct inode *new = NULL;
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int status = 0;
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int i;
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mlog_entry_void();
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new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE);
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if (IS_ERR(new)) {
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status = PTR_ERR(new);
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mlog_errno(status);
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goto bail;
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}
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osb->root_inode = new;
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new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE);
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if (IS_ERR(new)) {
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status = PTR_ERR(new);
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mlog_errno(status);
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goto bail;
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}
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osb->sys_root_inode = new;
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for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
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i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
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new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
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if (!new) {
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ocfs2_release_system_inodes(osb);
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status = -EINVAL;
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mlog_errno(status);
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/* FIXME: Should ERROR_RO_FS */
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mlog(ML_ERROR, "Unable to load system inode %d, "
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"possibly corrupt fs?", i);
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goto bail;
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}
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// the array now has one ref, so drop this one
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iput(new);
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}
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bail:
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mlog_exit(status);
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return status;
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}
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static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
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{
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struct inode *new = NULL;
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int status = 0;
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int i;
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mlog_entry_void();
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for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
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i < NUM_SYSTEM_INODES;
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i++) {
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new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
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if (!new) {
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ocfs2_release_system_inodes(osb);
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status = -EINVAL;
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mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
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status, i, osb->slot_num);
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goto bail;
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}
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/* the array now has one ref, so drop this one */
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iput(new);
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}
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bail:
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mlog_exit(status);
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return status;
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}
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static int ocfs2_release_system_inodes(struct ocfs2_super *osb)
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{
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int status = 0, i;
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struct inode *inode;
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mlog_entry_void();
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for (i = 0; i < NUM_SYSTEM_INODES; i++) {
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inode = osb->system_inodes[i];
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if (inode) {
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iput(inode);
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osb->system_inodes[i] = NULL;
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}
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}
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inode = osb->sys_root_inode;
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if (inode) {
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iput(inode);
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osb->sys_root_inode = NULL;
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}
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inode = osb->root_inode;
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if (inode) {
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iput(inode);
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osb->root_inode = NULL;
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}
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mlog_exit(status);
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return status;
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}
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/* We're allocating fs objects, use GFP_NOFS */
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static struct inode *ocfs2_alloc_inode(struct super_block *sb)
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{
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struct ocfs2_inode_info *oi;
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oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
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if (!oi)
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return NULL;
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return &oi->vfs_inode;
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}
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static void ocfs2_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
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}
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/* From xfs_super.c:xfs_max_file_offset
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* Copyright (c) 2000-2004 Silicon Graphics, Inc.
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*/
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static unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
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{
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unsigned int pagefactor = 1;
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unsigned int bitshift = BITS_PER_LONG - 1;
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/* Figure out maximum filesize, on Linux this can depend on
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* the filesystem blocksize (on 32 bit platforms).
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* __block_prepare_write does this in an [unsigned] long...
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* page->index << (PAGE_CACHE_SHIFT - bbits)
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* So, for page sized blocks (4K on 32 bit platforms),
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* this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
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* (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
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* but for smaller blocksizes it is less (bbits = log2 bsize).
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* Note1: get_block_t takes a long (implicit cast from above)
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* Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
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* can optionally convert the [unsigned] long from above into
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* an [unsigned] long long.
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*/
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#if BITS_PER_LONG == 32
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# if defined(CONFIG_LBD)
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BUILD_BUG_ON(sizeof(sector_t) != 8);
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pagefactor = PAGE_CACHE_SIZE;
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bitshift = BITS_PER_LONG;
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# else
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pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
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# endif
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#endif
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return (((unsigned long long)pagefactor) << bitshift) - 1;
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}
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static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
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{
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int incompat_features;
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int ret = 0;
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unsigned long parsed_options;
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struct ocfs2_super *osb = OCFS2_SB(sb);
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if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
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ret = -EINVAL;
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goto out;
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}
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if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
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(parsed_options & OCFS2_MOUNT_HB_LOCAL)) {
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ret = -EINVAL;
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mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
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goto out;
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}
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if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
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(parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) {
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ret = -EINVAL;
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mlog(ML_ERROR, "Cannot change data mode on remount\n");
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goto out;
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}
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/* We're going to/from readonly mode. */
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if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
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/* Lock here so the check of HARD_RO and the potential
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* setting of SOFT_RO is atomic. */
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spin_lock(&osb->osb_lock);
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if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
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mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
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ret = -EROFS;
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goto unlock_osb;
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}
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if (*flags & MS_RDONLY) {
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mlog(0, "Going to ro mode.\n");
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sb->s_flags |= MS_RDONLY;
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osb->osb_flags |= OCFS2_OSB_SOFT_RO;
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} else {
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mlog(0, "Making ro filesystem writeable.\n");
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if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
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mlog(ML_ERROR, "Cannot remount RDWR "
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"filesystem due to previous errors.\n");
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ret = -EROFS;
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goto unlock_osb;
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}
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incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
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if (incompat_features) {
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mlog(ML_ERROR, "Cannot remount RDWR because "
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"of unsupported optional features "
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"(%x).\n", incompat_features);
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ret = -EINVAL;
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goto unlock_osb;
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}
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sb->s_flags &= ~MS_RDONLY;
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osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
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}
|
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unlock_osb:
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spin_unlock(&osb->osb_lock);
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}
|
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|
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if (!ret) {
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if (!ocfs2_is_hard_readonly(osb))
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ocfs2_set_journal_params(osb);
|
|
|
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/* Only save off the new mount options in case of a successful
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* remount. */
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osb->s_mount_opt = parsed_options;
|
|
}
|
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out:
|
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return ret;
|
|
}
|
|
|
|
static int ocfs2_sb_probe(struct super_block *sb,
|
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struct buffer_head **bh,
|
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int *sector_size)
|
|
{
|
|
int status = 0, tmpstat;
|
|
struct ocfs1_vol_disk_hdr *hdr;
|
|
struct ocfs2_dinode *di;
|
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int blksize;
|
|
|
|
*bh = NULL;
|
|
|
|
/* may be > 512 */
|
|
*sector_size = bdev_hardsect_size(sb->s_bdev);
|
|
if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
|
|
mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
|
|
*sector_size, OCFS2_MAX_BLOCKSIZE);
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
/* Can this really happen? */
|
|
if (*sector_size < OCFS2_MIN_BLOCKSIZE)
|
|
*sector_size = OCFS2_MIN_BLOCKSIZE;
|
|
|
|
/* check block zero for old format */
|
|
status = ocfs2_get_sector(sb, bh, 0, *sector_size);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
|
|
if (hdr->major_version == OCFS1_MAJOR_VERSION) {
|
|
mlog(ML_ERROR, "incompatible version: %u.%u\n",
|
|
hdr->major_version, hdr->minor_version);
|
|
status = -EINVAL;
|
|
}
|
|
if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
|
|
strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
|
|
mlog(ML_ERROR, "incompatible volume signature: %8s\n",
|
|
hdr->signature);
|
|
status = -EINVAL;
|
|
}
|
|
brelse(*bh);
|
|
*bh = NULL;
|
|
if (status < 0) {
|
|
mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
|
|
"upgraded before mounting with ocfs v2\n");
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Now check at magic offset for 512, 1024, 2048, 4096
|
|
* blocksizes. 4096 is the maximum blocksize because it is
|
|
* the minimum clustersize.
|
|
*/
|
|
status = -EINVAL;
|
|
for (blksize = *sector_size;
|
|
blksize <= OCFS2_MAX_BLOCKSIZE;
|
|
blksize <<= 1) {
|
|
tmpstat = ocfs2_get_sector(sb, bh,
|
|
OCFS2_SUPER_BLOCK_BLKNO,
|
|
blksize);
|
|
if (tmpstat < 0) {
|
|
status = tmpstat;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
di = (struct ocfs2_dinode *) (*bh)->b_data;
|
|
status = ocfs2_verify_volume(di, *bh, blksize);
|
|
if (status >= 0)
|
|
goto bail;
|
|
brelse(*bh);
|
|
*bh = NULL;
|
|
if (status != -EAGAIN)
|
|
break;
|
|
}
|
|
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
|
|
{
|
|
if (ocfs2_mount_local(osb)) {
|
|
if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
|
|
mlog(ML_ERROR, "Cannot heartbeat on a locally "
|
|
"mounted device.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
|
|
if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb)) {
|
|
mlog(ML_ERROR, "Heartbeat has to be started to mount "
|
|
"a read-write clustered device.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
|
|
{
|
|
struct dentry *root;
|
|
int status, sector_size;
|
|
unsigned long parsed_opt;
|
|
struct inode *inode = NULL;
|
|
struct ocfs2_super *osb = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
char nodestr[8];
|
|
|
|
mlog_entry("%p, %p, %i", sb, data, silent);
|
|
|
|
if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) {
|
|
status = -EINVAL;
|
|
goto read_super_error;
|
|
}
|
|
|
|
/* for now we only have one cluster/node, make sure we see it
|
|
* in the heartbeat universe */
|
|
if (parsed_opt & OCFS2_MOUNT_HB_LOCAL) {
|
|
if (!o2hb_check_local_node_heartbeating()) {
|
|
status = -EINVAL;
|
|
goto read_super_error;
|
|
}
|
|
}
|
|
|
|
/* probe for superblock */
|
|
status = ocfs2_sb_probe(sb, &bh, §or_size);
|
|
if (status < 0) {
|
|
mlog(ML_ERROR, "superblock probe failed!\n");
|
|
goto read_super_error;
|
|
}
|
|
|
|
status = ocfs2_initialize_super(sb, bh, sector_size);
|
|
osb = OCFS2_SB(sb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto read_super_error;
|
|
}
|
|
brelse(bh);
|
|
bh = NULL;
|
|
osb->s_mount_opt = parsed_opt;
|
|
|
|
sb->s_magic = OCFS2_SUPER_MAGIC;
|
|
|
|
/* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
|
|
* heartbeat=none */
|
|
if (bdev_read_only(sb->s_bdev)) {
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
|
status = -EACCES;
|
|
mlog(ML_ERROR, "Readonly device detected but readonly "
|
|
"mount was not specified.\n");
|
|
goto read_super_error;
|
|
}
|
|
|
|
/* You should not be able to start a local heartbeat
|
|
* on a readonly device. */
|
|
if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
|
|
status = -EROFS;
|
|
mlog(ML_ERROR, "Local heartbeat specified on readonly "
|
|
"device.\n");
|
|
goto read_super_error;
|
|
}
|
|
|
|
status = ocfs2_check_journals_nolocks(osb);
|
|
if (status < 0) {
|
|
if (status == -EROFS)
|
|
mlog(ML_ERROR, "Recovery required on readonly "
|
|
"file system, but write access is "
|
|
"unavailable.\n");
|
|
else
|
|
mlog_errno(status);
|
|
goto read_super_error;
|
|
}
|
|
|
|
ocfs2_set_ro_flag(osb, 1);
|
|
|
|
printk(KERN_NOTICE "Readonly device detected. No cluster "
|
|
"services will be utilized for this mount. Recovery "
|
|
"will be skipped.\n");
|
|
}
|
|
|
|
if (!ocfs2_is_hard_readonly(osb)) {
|
|
if (sb->s_flags & MS_RDONLY)
|
|
ocfs2_set_ro_flag(osb, 0);
|
|
}
|
|
|
|
status = ocfs2_verify_heartbeat(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto read_super_error;
|
|
}
|
|
|
|
osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
|
|
ocfs2_debugfs_root);
|
|
if (!osb->osb_debug_root) {
|
|
status = -EINVAL;
|
|
mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
|
|
goto read_super_error;
|
|
}
|
|
|
|
status = ocfs2_mount_volume(sb);
|
|
if (osb->root_inode)
|
|
inode = igrab(osb->root_inode);
|
|
|
|
if (status < 0)
|
|
goto read_super_error;
|
|
|
|
if (!inode) {
|
|
status = -EIO;
|
|
mlog_errno(status);
|
|
goto read_super_error;
|
|
}
|
|
|
|
root = d_alloc_root(inode);
|
|
if (!root) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto read_super_error;
|
|
}
|
|
|
|
sb->s_root = root;
|
|
|
|
ocfs2_complete_mount_recovery(osb);
|
|
|
|
if (ocfs2_mount_local(osb))
|
|
snprintf(nodestr, sizeof(nodestr), "local");
|
|
else
|
|
snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num);
|
|
|
|
printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
|
|
"with %s data mode.\n",
|
|
osb->dev_str, nodestr, osb->slot_num,
|
|
osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
|
|
"ordered");
|
|
|
|
atomic_set(&osb->vol_state, VOLUME_MOUNTED);
|
|
wake_up(&osb->osb_mount_event);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
|
|
read_super_error:
|
|
if (bh != NULL)
|
|
brelse(bh);
|
|
|
|
if (inode)
|
|
iput(inode);
|
|
|
|
if (osb) {
|
|
atomic_set(&osb->vol_state, VOLUME_DISABLED);
|
|
wake_up(&osb->osb_mount_event);
|
|
ocfs2_dismount_volume(sb, 1);
|
|
}
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_get_sb(struct file_system_type *fs_type,
|
|
int flags,
|
|
const char *dev_name,
|
|
void *data,
|
|
struct vfsmount *mnt)
|
|
{
|
|
return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
|
|
mnt);
|
|
}
|
|
|
|
static struct file_system_type ocfs2_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ocfs2",
|
|
.get_sb = ocfs2_get_sb, /* is this called when we mount
|
|
* the fs? */
|
|
.kill_sb = kill_block_super, /* set to the generic one
|
|
* right now, but do we
|
|
* need to change that? */
|
|
.fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
|
|
.next = NULL
|
|
};
|
|
|
|
static int ocfs2_parse_options(struct super_block *sb,
|
|
char *options,
|
|
unsigned long *mount_opt,
|
|
int is_remount)
|
|
{
|
|
int status;
|
|
char *p;
|
|
|
|
mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
|
|
options ? options : "(none)");
|
|
|
|
*mount_opt = 0;
|
|
|
|
if (!options) {
|
|
status = 1;
|
|
goto bail;
|
|
}
|
|
|
|
while ((p = strsep(&options, ",")) != NULL) {
|
|
int token, option;
|
|
substring_t args[MAX_OPT_ARGS];
|
|
struct ocfs2_super * osb = OCFS2_SB(sb);
|
|
|
|
if (!*p)
|
|
continue;
|
|
|
|
token = match_token(p, tokens, args);
|
|
switch (token) {
|
|
case Opt_hb_local:
|
|
*mount_opt |= OCFS2_MOUNT_HB_LOCAL;
|
|
break;
|
|
case Opt_hb_none:
|
|
*mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
|
|
break;
|
|
case Opt_barrier:
|
|
if (match_int(&args[0], &option)) {
|
|
status = 0;
|
|
goto bail;
|
|
}
|
|
if (option)
|
|
*mount_opt |= OCFS2_MOUNT_BARRIER;
|
|
else
|
|
*mount_opt &= ~OCFS2_MOUNT_BARRIER;
|
|
break;
|
|
case Opt_intr:
|
|
*mount_opt &= ~OCFS2_MOUNT_NOINTR;
|
|
break;
|
|
case Opt_nointr:
|
|
*mount_opt |= OCFS2_MOUNT_NOINTR;
|
|
break;
|
|
case Opt_err_panic:
|
|
*mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
|
|
break;
|
|
case Opt_err_ro:
|
|
*mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
|
|
break;
|
|
case Opt_data_ordered:
|
|
*mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
|
|
break;
|
|
case Opt_data_writeback:
|
|
*mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
|
|
break;
|
|
case Opt_atime_quantum:
|
|
if (match_int(&args[0], &option)) {
|
|
status = 0;
|
|
goto bail;
|
|
}
|
|
if (option >= 0)
|
|
osb->s_atime_quantum = option;
|
|
else
|
|
osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
|
|
break;
|
|
default:
|
|
mlog(ML_ERROR,
|
|
"Unrecognized mount option \"%s\" "
|
|
"or missing value\n", p);
|
|
status = 0;
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
status = 1;
|
|
|
|
bail:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static int __init ocfs2_init(void)
|
|
{
|
|
int status;
|
|
|
|
mlog_entry_void();
|
|
|
|
ocfs2_print_version();
|
|
|
|
if (init_ocfs2_extent_maps())
|
|
return -ENOMEM;
|
|
|
|
status = init_ocfs2_uptodate_cache();
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_initialize_mem_caches();
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
|
|
if (!ocfs2_wq) {
|
|
status = -ENOMEM;
|
|
goto leave;
|
|
}
|
|
|
|
ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
|
|
if (!ocfs2_debugfs_root) {
|
|
status = -EFAULT;
|
|
mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
|
|
}
|
|
|
|
leave:
|
|
if (status < 0) {
|
|
ocfs2_free_mem_caches();
|
|
exit_ocfs2_uptodate_cache();
|
|
exit_ocfs2_extent_maps();
|
|
}
|
|
|
|
mlog_exit(status);
|
|
|
|
if (status >= 0) {
|
|
return register_filesystem(&ocfs2_fs_type);
|
|
} else
|
|
return -1;
|
|
}
|
|
|
|
static void __exit ocfs2_exit(void)
|
|
{
|
|
mlog_entry_void();
|
|
|
|
if (ocfs2_wq) {
|
|
flush_workqueue(ocfs2_wq);
|
|
destroy_workqueue(ocfs2_wq);
|
|
}
|
|
|
|
debugfs_remove(ocfs2_debugfs_root);
|
|
|
|
ocfs2_free_mem_caches();
|
|
|
|
unregister_filesystem(&ocfs2_fs_type);
|
|
|
|
exit_ocfs2_extent_maps();
|
|
|
|
exit_ocfs2_uptodate_cache();
|
|
|
|
mlog_exit_void();
|
|
}
|
|
|
|
static void ocfs2_put_super(struct super_block *sb)
|
|
{
|
|
mlog_entry("(0x%p)\n", sb);
|
|
|
|
ocfs2_sync_blockdev(sb);
|
|
ocfs2_dismount_volume(sb, 0);
|
|
|
|
mlog_exit_void();
|
|
}
|
|
|
|
static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
struct ocfs2_super *osb;
|
|
u32 numbits, freebits;
|
|
int status;
|
|
struct ocfs2_dinode *bm_lock;
|
|
struct buffer_head *bh = NULL;
|
|
struct inode *inode = NULL;
|
|
|
|
mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
|
|
|
|
osb = OCFS2_SB(dentry->d_sb);
|
|
|
|
inode = ocfs2_get_system_file_inode(osb,
|
|
GLOBAL_BITMAP_SYSTEM_INODE,
|
|
OCFS2_INVALID_SLOT);
|
|
if (!inode) {
|
|
mlog(ML_ERROR, "failed to get bitmap inode\n");
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_meta_lock(inode, &bh, 0);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
bm_lock = (struct ocfs2_dinode *) bh->b_data;
|
|
|
|
numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
|
|
freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
|
|
|
|
buf->f_type = OCFS2_SUPER_MAGIC;
|
|
buf->f_bsize = dentry->d_sb->s_blocksize;
|
|
buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
|
|
buf->f_blocks = ((sector_t) numbits) *
|
|
(osb->s_clustersize >> osb->sb->s_blocksize_bits);
|
|
buf->f_bfree = ((sector_t) freebits) *
|
|
(osb->s_clustersize >> osb->sb->s_blocksize_bits);
|
|
buf->f_bavail = buf->f_bfree;
|
|
buf->f_files = numbits;
|
|
buf->f_ffree = freebits;
|
|
|
|
brelse(bh);
|
|
|
|
ocfs2_meta_unlock(inode, 0);
|
|
status = 0;
|
|
bail:
|
|
if (inode)
|
|
iput(inode);
|
|
|
|
mlog_exit(status);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void ocfs2_inode_init_once(void *data,
|
|
struct kmem_cache *cachep,
|
|
unsigned long flags)
|
|
{
|
|
struct ocfs2_inode_info *oi = data;
|
|
|
|
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
|
|
SLAB_CTOR_CONSTRUCTOR) {
|
|
oi->ip_flags = 0;
|
|
oi->ip_open_count = 0;
|
|
spin_lock_init(&oi->ip_lock);
|
|
ocfs2_extent_map_init(&oi->vfs_inode);
|
|
INIT_LIST_HEAD(&oi->ip_io_markers);
|
|
oi->ip_created_trans = 0;
|
|
oi->ip_last_trans = 0;
|
|
oi->ip_dir_start_lookup = 0;
|
|
|
|
init_rwsem(&oi->ip_alloc_sem);
|
|
mutex_init(&oi->ip_io_mutex);
|
|
|
|
oi->ip_blkno = 0ULL;
|
|
oi->ip_clusters = 0;
|
|
|
|
ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
|
|
ocfs2_lock_res_init_once(&oi->ip_meta_lockres);
|
|
ocfs2_lock_res_init_once(&oi->ip_data_lockres);
|
|
|
|
ocfs2_metadata_cache_init(&oi->vfs_inode);
|
|
|
|
inode_init_once(&oi->vfs_inode);
|
|
}
|
|
}
|
|
|
|
static int ocfs2_initialize_mem_caches(void)
|
|
{
|
|
ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
|
|
sizeof(struct ocfs2_inode_info),
|
|
0,
|
|
(SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
|
|
SLAB_MEM_SPREAD),
|
|
ocfs2_inode_init_once, NULL);
|
|
if (!ocfs2_inode_cachep)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ocfs2_free_mem_caches(void)
|
|
{
|
|
if (ocfs2_inode_cachep)
|
|
kmem_cache_destroy(ocfs2_inode_cachep);
|
|
|
|
ocfs2_inode_cachep = NULL;
|
|
}
|
|
|
|
static int ocfs2_get_sector(struct super_block *sb,
|
|
struct buffer_head **bh,
|
|
int block,
|
|
int sect_size)
|
|
{
|
|
if (!sb_set_blocksize(sb, sect_size)) {
|
|
mlog(ML_ERROR, "unable to set blocksize\n");
|
|
return -EIO;
|
|
}
|
|
|
|
*bh = sb_getblk(sb, block);
|
|
if (!*bh) {
|
|
mlog_errno(-EIO);
|
|
return -EIO;
|
|
}
|
|
lock_buffer(*bh);
|
|
if (!buffer_dirty(*bh))
|
|
clear_buffer_uptodate(*bh);
|
|
unlock_buffer(*bh);
|
|
ll_rw_block(READ, 1, bh);
|
|
wait_on_buffer(*bh);
|
|
return 0;
|
|
}
|
|
|
|
/* ocfs2 1.0 only allows one cluster and node identity per kernel image. */
|
|
static int ocfs2_fill_local_node_info(struct ocfs2_super *osb)
|
|
{
|
|
int status;
|
|
|
|
/* XXX hold a ref on the node while mounte? easy enough, if
|
|
* desirable. */
|
|
if (ocfs2_mount_local(osb))
|
|
osb->node_num = 0;
|
|
else
|
|
osb->node_num = o2nm_this_node();
|
|
|
|
if (osb->node_num == O2NM_MAX_NODES) {
|
|
mlog(ML_ERROR, "could not find this host's node number\n");
|
|
status = -ENOENT;
|
|
goto bail;
|
|
}
|
|
|
|
mlog(0, "I am node %d\n", osb->node_num);
|
|
|
|
status = 0;
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_mount_volume(struct super_block *sb)
|
|
{
|
|
int status = 0;
|
|
int unlock_super = 0;
|
|
struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
|
|
mlog_entry_void();
|
|
|
|
if (ocfs2_is_hard_readonly(osb))
|
|
goto leave;
|
|
|
|
status = ocfs2_fill_local_node_info(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_register_hb_callbacks(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_dlm_init(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
/* requires vote_thread to be running. */
|
|
status = ocfs2_register_net_handlers(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_super_lock(osb, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
unlock_super = 1;
|
|
|
|
/* This will load up the node map and add ourselves to it. */
|
|
status = ocfs2_find_slot(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
ocfs2_populate_mounted_map(osb);
|
|
|
|
/* load all node-local system inodes */
|
|
status = ocfs2_init_local_system_inodes(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_check_volume(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_truncate_log_init(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
if (ocfs2_mount_local(osb))
|
|
goto leave;
|
|
|
|
/* This should be sent *after* we recovered our journal as it
|
|
* will cause other nodes to unmark us as needing
|
|
* recovery. However, we need to send it *before* dropping the
|
|
* super block lock as otherwise their recovery threads might
|
|
* try to clean us up while we're live! */
|
|
status = ocfs2_request_mount_vote(osb);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
leave:
|
|
if (unlock_super)
|
|
ocfs2_super_unlock(osb, 1);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* we can't grab the goofy sem lock from inside wait_event, so we use
|
|
* memory barriers to make sure that we'll see the null task before
|
|
* being woken up */
|
|
static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
|
|
{
|
|
mb();
|
|
return osb->recovery_thread_task != NULL;
|
|
}
|
|
|
|
static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
|
|
{
|
|
int tmp;
|
|
struct ocfs2_super *osb = NULL;
|
|
char nodestr[8];
|
|
|
|
mlog_entry("(0x%p)\n", sb);
|
|
|
|
BUG_ON(!sb);
|
|
osb = OCFS2_SB(sb);
|
|
BUG_ON(!osb);
|
|
|
|
ocfs2_shutdown_local_alloc(osb);
|
|
|
|
ocfs2_truncate_log_shutdown(osb);
|
|
|
|
/* disable any new recovery threads and wait for any currently
|
|
* running ones to exit. Do this before setting the vol_state. */
|
|
mutex_lock(&osb->recovery_lock);
|
|
osb->disable_recovery = 1;
|
|
mutex_unlock(&osb->recovery_lock);
|
|
wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
|
|
|
|
/* At this point, we know that no more recovery threads can be
|
|
* launched, so wait for any recovery completion work to
|
|
* complete. */
|
|
flush_workqueue(ocfs2_wq);
|
|
|
|
ocfs2_journal_shutdown(osb);
|
|
|
|
ocfs2_sync_blockdev(sb);
|
|
|
|
/* No dlm means we've failed during mount, so skip all the
|
|
* steps which depended on that to complete. */
|
|
if (osb->dlm) {
|
|
tmp = ocfs2_super_lock(osb, 1);
|
|
if (tmp < 0) {
|
|
mlog_errno(tmp);
|
|
return;
|
|
}
|
|
|
|
tmp = ocfs2_request_umount_vote(osb);
|
|
if (tmp < 0)
|
|
mlog_errno(tmp);
|
|
|
|
if (osb->slot_num != OCFS2_INVALID_SLOT)
|
|
ocfs2_put_slot(osb);
|
|
|
|
ocfs2_super_unlock(osb, 1);
|
|
}
|
|
|
|
ocfs2_release_system_inodes(osb);
|
|
|
|
if (osb->dlm) {
|
|
ocfs2_unregister_net_handlers(osb);
|
|
|
|
ocfs2_dlm_shutdown(osb);
|
|
}
|
|
|
|
ocfs2_clear_hb_callbacks(osb);
|
|
|
|
debugfs_remove(osb->osb_debug_root);
|
|
|
|
if (!mnt_err)
|
|
ocfs2_stop_heartbeat(osb);
|
|
|
|
atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
|
|
|
|
if (ocfs2_mount_local(osb))
|
|
snprintf(nodestr, sizeof(nodestr), "local");
|
|
else
|
|
snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num);
|
|
|
|
printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
|
|
osb->dev_str, nodestr);
|
|
|
|
ocfs2_delete_osb(osb);
|
|
kfree(osb);
|
|
sb->s_dev = 0;
|
|
sb->s_fs_info = NULL;
|
|
}
|
|
|
|
static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
|
|
unsigned uuid_bytes)
|
|
{
|
|
int i, ret;
|
|
char *ptr;
|
|
|
|
BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
|
|
|
|
osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
|
|
if (osb->uuid_str == NULL)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
|
|
/* print with null */
|
|
ret = snprintf(ptr, 3, "%02X", uuid[i]);
|
|
if (ret != 2) /* drop super cleans up */
|
|
return -EINVAL;
|
|
/* then only advance past the last char */
|
|
ptr += 2;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocfs2_initialize_super(struct super_block *sb,
|
|
struct buffer_head *bh,
|
|
int sector_size)
|
|
{
|
|
int status = 0;
|
|
int i;
|
|
struct ocfs2_dinode *di = NULL;
|
|
struct inode *inode = NULL;
|
|
struct buffer_head *bitmap_bh = NULL;
|
|
struct ocfs2_journal *journal;
|
|
__le32 uuid_net_key;
|
|
struct ocfs2_super *osb;
|
|
|
|
mlog_entry_void();
|
|
|
|
osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
|
|
if (!osb) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
sb->s_fs_info = osb;
|
|
sb->s_op = &ocfs2_sops;
|
|
sb->s_export_op = &ocfs2_export_ops;
|
|
sb->s_flags |= MS_NOATIME;
|
|
/* this is needed to support O_LARGEFILE */
|
|
sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits);
|
|
|
|
osb->sb = sb;
|
|
/* Save off for ocfs2_rw_direct */
|
|
osb->s_sectsize_bits = blksize_bits(sector_size);
|
|
BUG_ON(!osb->s_sectsize_bits);
|
|
|
|
osb->net_response_ids = 0;
|
|
spin_lock_init(&osb->net_response_lock);
|
|
INIT_LIST_HEAD(&osb->net_response_list);
|
|
|
|
INIT_LIST_HEAD(&osb->osb_net_handlers);
|
|
init_waitqueue_head(&osb->recovery_event);
|
|
spin_lock_init(&osb->vote_task_lock);
|
|
init_waitqueue_head(&osb->vote_event);
|
|
osb->vote_work_sequence = 0;
|
|
osb->vote_wake_sequence = 0;
|
|
INIT_LIST_HEAD(&osb->blocked_lock_list);
|
|
osb->blocked_lock_count = 0;
|
|
INIT_LIST_HEAD(&osb->vote_list);
|
|
spin_lock_init(&osb->osb_lock);
|
|
|
|
atomic_set(&osb->alloc_stats.moves, 0);
|
|
atomic_set(&osb->alloc_stats.local_data, 0);
|
|
atomic_set(&osb->alloc_stats.bitmap_data, 0);
|
|
atomic_set(&osb->alloc_stats.bg_allocs, 0);
|
|
atomic_set(&osb->alloc_stats.bg_extends, 0);
|
|
|
|
ocfs2_init_node_maps(osb);
|
|
|
|
snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
|
|
MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
|
|
|
|
mutex_init(&osb->recovery_lock);
|
|
|
|
osb->disable_recovery = 0;
|
|
osb->recovery_thread_task = NULL;
|
|
|
|
init_waitqueue_head(&osb->checkpoint_event);
|
|
atomic_set(&osb->needs_checkpoint, 0);
|
|
|
|
osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
|
|
|
|
osb->node_num = O2NM_INVALID_NODE_NUM;
|
|
osb->slot_num = OCFS2_INVALID_SLOT;
|
|
|
|
osb->local_alloc_state = OCFS2_LA_UNUSED;
|
|
osb->local_alloc_bh = NULL;
|
|
|
|
ocfs2_setup_hb_callbacks(osb);
|
|
|
|
init_waitqueue_head(&osb->osb_mount_event);
|
|
|
|
osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
|
|
if (!osb->vol_label) {
|
|
mlog(ML_ERROR, "unable to alloc vol label\n");
|
|
status = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
|
|
di = (struct ocfs2_dinode *)bh->b_data;
|
|
|
|
osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
|
|
if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
|
|
mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
|
|
osb->max_slots);
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
mlog(0, "max_slots for this device: %u\n", osb->max_slots);
|
|
|
|
init_waitqueue_head(&osb->osb_wipe_event);
|
|
osb->osb_orphan_wipes = kcalloc(osb->max_slots,
|
|
sizeof(*osb->osb_orphan_wipes),
|
|
GFP_KERNEL);
|
|
if (!osb->osb_orphan_wipes) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
osb->s_feature_compat =
|
|
le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
|
|
osb->s_feature_ro_compat =
|
|
le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
|
|
osb->s_feature_incompat =
|
|
le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
|
|
|
|
if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
|
|
mlog(ML_ERROR, "couldn't mount because of unsupported "
|
|
"optional features (%x).\n", i);
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
if (!(osb->sb->s_flags & MS_RDONLY) &&
|
|
(i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
|
|
mlog(ML_ERROR, "couldn't mount RDWR because of "
|
|
"unsupported optional features (%x).\n", i);
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
get_random_bytes(&osb->s_next_generation, sizeof(u32));
|
|
|
|
/* FIXME
|
|
* This should be done in ocfs2_journal_init(), but unknown
|
|
* ordering issues will cause the filesystem to crash.
|
|
* If anyone wants to figure out what part of the code
|
|
* refers to osb->journal before ocfs2_journal_init() is run,
|
|
* be my guest.
|
|
*/
|
|
/* initialize our journal structure */
|
|
|
|
journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
|
|
if (!journal) {
|
|
mlog(ML_ERROR, "unable to alloc journal\n");
|
|
status = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
osb->journal = journal;
|
|
journal->j_osb = osb;
|
|
|
|
atomic_set(&journal->j_num_trans, 0);
|
|
init_rwsem(&journal->j_trans_barrier);
|
|
init_waitqueue_head(&journal->j_checkpointed);
|
|
spin_lock_init(&journal->j_lock);
|
|
journal->j_trans_id = (unsigned long) 1;
|
|
INIT_LIST_HEAD(&journal->j_la_cleanups);
|
|
INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
|
|
journal->j_state = OCFS2_JOURNAL_FREE;
|
|
|
|
/* get some pseudo constants for clustersize bits */
|
|
osb->s_clustersize_bits =
|
|
le32_to_cpu(di->id2.i_super.s_clustersize_bits);
|
|
osb->s_clustersize = 1 << osb->s_clustersize_bits;
|
|
mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
|
|
|
|
if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
|
|
osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
|
|
mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
|
|
osb->s_clustersize);
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
|
|
> (u32)~0UL) {
|
|
mlog(ML_ERROR, "Volume might try to write to blocks beyond "
|
|
"what jbd can address in 32 bits.\n");
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
|
|
sizeof(di->id2.i_super.s_uuid))) {
|
|
mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
|
|
status = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
|
|
memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
|
|
osb->net_key = le32_to_cpu(uuid_net_key);
|
|
|
|
strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
|
|
osb->vol_label[63] = '\0';
|
|
osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
|
|
osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
|
|
osb->first_cluster_group_blkno =
|
|
le64_to_cpu(di->id2.i_super.s_first_cluster_group);
|
|
osb->fs_generation = le32_to_cpu(di->i_fs_generation);
|
|
mlog(0, "vol_label: %s\n", osb->vol_label);
|
|
mlog(0, "uuid: %s\n", osb->uuid_str);
|
|
mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
|
|
(unsigned long long)osb->root_blkno,
|
|
(unsigned long long)osb->system_dir_blkno);
|
|
|
|
osb->osb_dlm_debug = ocfs2_new_dlm_debug();
|
|
if (!osb->osb_dlm_debug) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
atomic_set(&osb->vol_state, VOLUME_INIT);
|
|
|
|
/* load root, system_dir, and all global system inodes */
|
|
status = ocfs2_init_global_system_inodes(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* global bitmap
|
|
*/
|
|
inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
|
|
OCFS2_INVALID_SLOT);
|
|
if (!inode) {
|
|
status = -EINVAL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
|
|
|
|
/* We don't have a cluster lock on the bitmap here because
|
|
* we're only interested in static information and the extra
|
|
* complexity at mount time isn't worht it. Don't pass the
|
|
* inode in to the read function though as we don't want it to
|
|
* be put in the cache. */
|
|
status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0,
|
|
NULL);
|
|
iput(inode);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
di = (struct ocfs2_dinode *) bitmap_bh->b_data;
|
|
osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
|
|
brelse(bitmap_bh);
|
|
mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n",
|
|
(unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg);
|
|
|
|
status = ocfs2_init_slot_info(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
bail:
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* will return: -EAGAIN if it is ok to keep searching for superblocks
|
|
* -EINVAL if there is a bad superblock
|
|
* 0 on success
|
|
*/
|
|
static int ocfs2_verify_volume(struct ocfs2_dinode *di,
|
|
struct buffer_head *bh,
|
|
u32 blksz)
|
|
{
|
|
int status = -EAGAIN;
|
|
|
|
mlog_entry_void();
|
|
|
|
if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
|
|
strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
|
|
status = -EINVAL;
|
|
if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
|
|
mlog(ML_ERROR, "found superblock with incorrect block "
|
|
"size: found %u, should be %u\n",
|
|
1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
|
|
blksz);
|
|
} else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
|
|
OCFS2_MAJOR_REV_LEVEL ||
|
|
le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
|
|
OCFS2_MINOR_REV_LEVEL) {
|
|
mlog(ML_ERROR, "found superblock with bad version: "
|
|
"found %u.%u, should be %u.%u\n",
|
|
le16_to_cpu(di->id2.i_super.s_major_rev_level),
|
|
le16_to_cpu(di->id2.i_super.s_minor_rev_level),
|
|
OCFS2_MAJOR_REV_LEVEL,
|
|
OCFS2_MINOR_REV_LEVEL);
|
|
} else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
|
|
mlog(ML_ERROR, "bad block number on superblock: "
|
|
"found %llu, should be %llu\n",
|
|
(unsigned long long)di->i_blkno,
|
|
(unsigned long long)bh->b_blocknr);
|
|
} else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
|
|
le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
|
|
mlog(ML_ERROR, "bad cluster size found: %u\n",
|
|
1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
|
|
} else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
|
|
mlog(ML_ERROR, "bad root_blkno: 0\n");
|
|
} else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
|
|
mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
|
|
} else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
|
|
mlog(ML_ERROR,
|
|
"Superblock slots found greater than file system "
|
|
"maximum: found %u, max %u\n",
|
|
le16_to_cpu(di->id2.i_super.s_max_slots),
|
|
OCFS2_MAX_SLOTS);
|
|
} else {
|
|
/* found it! */
|
|
status = 0;
|
|
}
|
|
}
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_check_volume(struct ocfs2_super *osb)
|
|
{
|
|
int status = 0;
|
|
int dirty;
|
|
int local;
|
|
struct ocfs2_dinode *local_alloc = NULL; /* only used if we
|
|
* recover
|
|
* ourselves. */
|
|
|
|
mlog_entry_void();
|
|
|
|
/* Init our journal object. */
|
|
status = ocfs2_journal_init(osb->journal, &dirty);
|
|
if (status < 0) {
|
|
mlog(ML_ERROR, "Could not initialize journal!\n");
|
|
goto finally;
|
|
}
|
|
|
|
/* If the journal was unmounted cleanly then we don't want to
|
|
* recover anything. Otherwise, journal_load will do that
|
|
* dirty work for us :) */
|
|
if (!dirty) {
|
|
status = ocfs2_journal_wipe(osb->journal, 0);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto finally;
|
|
}
|
|
} else {
|
|
mlog(ML_NOTICE, "File system was not unmounted cleanly, "
|
|
"recovering volume.\n");
|
|
}
|
|
|
|
local = ocfs2_mount_local(osb);
|
|
|
|
/* will play back anything left in the journal. */
|
|
ocfs2_journal_load(osb->journal, local);
|
|
|
|
if (dirty) {
|
|
/* recover my local alloc if we didn't unmount cleanly. */
|
|
status = ocfs2_begin_local_alloc_recovery(osb,
|
|
osb->slot_num,
|
|
&local_alloc);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto finally;
|
|
}
|
|
/* we complete the recovery process after we've marked
|
|
* ourselves as mounted. */
|
|
}
|
|
|
|
mlog(0, "Journal loaded.\n");
|
|
|
|
status = ocfs2_load_local_alloc(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto finally;
|
|
}
|
|
|
|
if (dirty) {
|
|
/* Recovery will be completed after we've mounted the
|
|
* rest of the volume. */
|
|
osb->dirty = 1;
|
|
osb->local_alloc_copy = local_alloc;
|
|
local_alloc = NULL;
|
|
}
|
|
|
|
/* go through each journal, trylock it and if you get the
|
|
* lock, and it's marked as dirty, set the bit in the recover
|
|
* map and launch a recovery thread for it. */
|
|
status = ocfs2_mark_dead_nodes(osb);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
finally:
|
|
if (local_alloc)
|
|
kfree(local_alloc);
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* The routine gets called from dismount or close whenever a dismount on
|
|
* volume is requested and the osb open count becomes 1.
|
|
* It will remove the osb from the global list and also free up all the
|
|
* initialized resources and fileobject.
|
|
*/
|
|
static void ocfs2_delete_osb(struct ocfs2_super *osb)
|
|
{
|
|
mlog_entry_void();
|
|
|
|
/* This function assumes that the caller has the main osb resource */
|
|
|
|
if (osb->slot_info)
|
|
ocfs2_free_slot_info(osb->slot_info);
|
|
|
|
kfree(osb->osb_orphan_wipes);
|
|
/* FIXME
|
|
* This belongs in journal shutdown, but because we have to
|
|
* allocate osb->journal at the start of ocfs2_initalize_osb(),
|
|
* we free it here.
|
|
*/
|
|
kfree(osb->journal);
|
|
if (osb->local_alloc_copy)
|
|
kfree(osb->local_alloc_copy);
|
|
kfree(osb->uuid_str);
|
|
ocfs2_put_dlm_debug(osb->osb_dlm_debug);
|
|
memset(osb, 0, sizeof(struct ocfs2_super));
|
|
|
|
mlog_exit_void();
|
|
}
|
|
|
|
/* Put OCFS2 into a readonly state, or (if the user specifies it),
|
|
* panic(). We do not support continue-on-error operation. */
|
|
static void ocfs2_handle_error(struct super_block *sb)
|
|
{
|
|
struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
|
|
if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
|
|
panic("OCFS2: (device %s): panic forced after error\n",
|
|
sb->s_id);
|
|
|
|
ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
|
|
|
|
if (sb->s_flags & MS_RDONLY &&
|
|
(ocfs2_is_soft_readonly(osb) ||
|
|
ocfs2_is_hard_readonly(osb)))
|
|
return;
|
|
|
|
printk(KERN_CRIT "File system is now read-only due to the potential "
|
|
"of on-disk corruption. Please run fsck.ocfs2 once the file "
|
|
"system is unmounted.\n");
|
|
sb->s_flags |= MS_RDONLY;
|
|
ocfs2_set_ro_flag(osb, 0);
|
|
}
|
|
|
|
static char error_buf[1024];
|
|
|
|
void __ocfs2_error(struct super_block *sb,
|
|
const char *function,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
vsnprintf(error_buf, sizeof(error_buf), fmt, args);
|
|
va_end(args);
|
|
|
|
/* Not using mlog here because we want to show the actual
|
|
* function the error came from. */
|
|
printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
|
|
sb->s_id, function, error_buf);
|
|
|
|
ocfs2_handle_error(sb);
|
|
}
|
|
|
|
/* Handle critical errors. This is intentionally more drastic than
|
|
* ocfs2_handle_error, so we only use for things like journal errors,
|
|
* etc. */
|
|
void __ocfs2_abort(struct super_block* sb,
|
|
const char *function,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
vsnprintf(error_buf, sizeof(error_buf), fmt, args);
|
|
va_end(args);
|
|
|
|
printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
|
|
sb->s_id, function, error_buf);
|
|
|
|
/* We don't have the cluster support yet to go straight to
|
|
* hard readonly in here. Until then, we want to keep
|
|
* ocfs2_abort() so that we can at least mark critical
|
|
* errors.
|
|
*
|
|
* TODO: This should abort the journal and alert other nodes
|
|
* that our slot needs recovery. */
|
|
|
|
/* Force a panic(). This stinks, but it's better than letting
|
|
* things continue without having a proper hard readonly
|
|
* here. */
|
|
OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
|
|
ocfs2_handle_error(sb);
|
|
}
|
|
|
|
module_init(ocfs2_init);
|
|
module_exit(ocfs2_exit);
|