467 строки
12 KiB
C
467 строки
12 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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* ocfs2.h
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*
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* Defines macros and structures used in OCFS2
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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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#ifndef OCFS2_H
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#define OCFS2_H
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include <linux/workqueue.h>
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#include <linux/kref.h>
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#include <linux/mutex.h>
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#include "cluster/nodemanager.h"
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#include "cluster/heartbeat.h"
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#include "cluster/tcp.h"
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#include "dlm/dlmapi.h"
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#include "ocfs2_fs.h"
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#include "endian.h"
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#include "ocfs2_lockid.h"
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struct ocfs2_extent_map {
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u32 em_clusters;
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struct rb_root em_extents;
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};
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/* Most user visible OCFS2 inodes will have very few pieces of
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* metadata, but larger files (including bitmaps, etc) must be taken
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* into account when designing an access scheme. We allow a small
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* amount of inlined blocks to be stored on an array and grow the
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* structure into a rb tree when necessary. */
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#define OCFS2_INODE_MAX_CACHE_ARRAY 2
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struct ocfs2_caching_info {
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unsigned int ci_num_cached;
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union {
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sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY];
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struct rb_root ci_tree;
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} ci_cache;
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};
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/* this limits us to 256 nodes
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* if we need more, we can do a kmalloc for the map */
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#define OCFS2_NODE_MAP_MAX_NODES 256
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struct ocfs2_node_map {
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u16 num_nodes;
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unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
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};
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enum ocfs2_ast_action {
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OCFS2_AST_INVALID = 0,
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OCFS2_AST_ATTACH,
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OCFS2_AST_CONVERT,
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OCFS2_AST_DOWNCONVERT,
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};
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/* actions for an unlockast function to take. */
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enum ocfs2_unlock_action {
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OCFS2_UNLOCK_INVALID = 0,
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OCFS2_UNLOCK_CANCEL_CONVERT,
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OCFS2_UNLOCK_DROP_LOCK,
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};
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/* ocfs2_lock_res->l_flags flags. */
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#define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized
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* the lvb */
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#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
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* dlm_lock */
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#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
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* downconvert*/
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#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
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#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
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#define OCFS2_LOCK_REFRESHING (0x00000020)
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#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
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* for shutdown paths */
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#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
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* when to skip queueing
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* a lock because it's
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* about to be
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* dropped. */
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#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
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struct ocfs2_lock_res_ops;
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typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
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struct ocfs2_lock_res {
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void *l_priv;
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struct ocfs2_lock_res_ops *l_ops;
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spinlock_t l_lock;
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struct list_head l_blocked_list;
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struct list_head l_mask_waiters;
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enum ocfs2_lock_type l_type;
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unsigned long l_flags;
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char l_name[OCFS2_LOCK_ID_MAX_LEN];
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int l_level;
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unsigned int l_ro_holders;
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unsigned int l_ex_holders;
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struct dlm_lockstatus l_lksb;
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/* used from AST/BAST funcs. */
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enum ocfs2_ast_action l_action;
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enum ocfs2_unlock_action l_unlock_action;
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int l_requested;
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int l_blocking;
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wait_queue_head_t l_event;
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struct list_head l_debug_list;
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};
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struct ocfs2_dlm_debug {
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struct kref d_refcnt;
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struct dentry *d_locking_state;
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struct list_head d_lockres_tracking;
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};
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enum ocfs2_vol_state
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{
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VOLUME_INIT = 0,
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VOLUME_MOUNTED,
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VOLUME_DISMOUNTED,
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VOLUME_DISABLED
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};
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struct ocfs2_alloc_stats
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{
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atomic_t moves;
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atomic_t local_data;
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atomic_t bitmap_data;
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atomic_t bg_allocs;
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atomic_t bg_extends;
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};
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enum ocfs2_local_alloc_state
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{
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OCFS2_LA_UNUSED = 0,
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OCFS2_LA_ENABLED,
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OCFS2_LA_DISABLED
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};
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enum ocfs2_mount_options
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{
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OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */
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OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
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OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
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OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
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OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
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};
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#define OCFS2_OSB_SOFT_RO 0x0001
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#define OCFS2_OSB_HARD_RO 0x0002
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#define OCFS2_OSB_ERROR_FS 0x0004
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struct ocfs2_journal;
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struct ocfs2_journal_handle;
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struct ocfs2_super
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{
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u32 osb_id; /* id used by the proc interface */
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struct task_struct *commit_task;
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struct super_block *sb;
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struct inode *root_inode;
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struct inode *sys_root_inode;
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struct inode *system_inodes[NUM_SYSTEM_INODES];
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struct ocfs2_slot_info *slot_info;
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spinlock_t node_map_lock;
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struct ocfs2_node_map mounted_map;
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struct ocfs2_node_map recovery_map;
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struct ocfs2_node_map umount_map;
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u32 num_clusters;
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u64 root_blkno;
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u64 system_dir_blkno;
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u64 bitmap_blkno;
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u32 bitmap_cpg;
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u8 *uuid;
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char *uuid_str;
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u8 *vol_label;
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u64 first_cluster_group_blkno;
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u32 fs_generation;
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u32 s_feature_compat;
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u32 s_feature_incompat;
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u32 s_feature_ro_compat;
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/* Protects s_next_generaion, osb_flags. Could protect more on
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* osb as it's very short lived. */
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spinlock_t osb_lock;
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u32 s_next_generation;
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unsigned long osb_flags;
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unsigned long s_mount_opt;
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u16 max_slots;
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u16 num_nodes;
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s16 node_num;
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s16 slot_num;
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int s_sectsize_bits;
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int s_clustersize;
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int s_clustersize_bits;
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struct proc_dir_entry *proc_sub_dir; /* points to /proc/fs/ocfs2/<maj_min> */
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atomic_t vol_state;
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struct mutex recovery_lock;
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struct task_struct *recovery_thread_task;
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int disable_recovery;
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wait_queue_head_t checkpoint_event;
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atomic_t needs_checkpoint;
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struct ocfs2_journal *journal;
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enum ocfs2_local_alloc_state local_alloc_state;
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struct buffer_head *local_alloc_bh;
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/* Next two fields are for local node slot recovery during
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* mount. */
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int dirty;
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struct ocfs2_dinode *local_alloc_copy;
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struct ocfs2_alloc_stats alloc_stats;
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char dev_str[20]; /* "major,minor" of the device */
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struct dlm_ctxt *dlm;
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struct ocfs2_lock_res osb_super_lockres;
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struct ocfs2_lock_res osb_rename_lockres;
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struct dlm_eviction_cb osb_eviction_cb;
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struct ocfs2_dlm_debug *osb_dlm_debug;
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struct dentry *osb_debug_root;
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wait_queue_head_t recovery_event;
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spinlock_t vote_task_lock;
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struct task_struct *vote_task;
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wait_queue_head_t vote_event;
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unsigned long vote_wake_sequence;
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unsigned long vote_work_sequence;
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struct list_head blocked_lock_list;
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unsigned long blocked_lock_count;
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struct list_head vote_list;
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int vote_count;
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u32 net_key;
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spinlock_t net_response_lock;
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unsigned int net_response_ids;
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struct list_head net_response_list;
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struct o2hb_callback_func osb_hb_up;
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struct o2hb_callback_func osb_hb_down;
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struct list_head osb_net_handlers;
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wait_queue_head_t osb_mount_event;
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/* Truncate log info */
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struct inode *osb_tl_inode;
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struct buffer_head *osb_tl_bh;
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struct work_struct osb_truncate_log_wq;
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struct ocfs2_node_map osb_recovering_orphan_dirs;
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unsigned int *osb_orphan_wipes;
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wait_queue_head_t osb_wipe_event;
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};
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#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
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#define OCFS2_MAX_OSB_ID 65536
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static inline int ocfs2_should_order_data(struct inode *inode)
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{
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if (!S_ISREG(inode->i_mode))
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return 0;
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if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
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return 0;
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return 1;
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}
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/* set / clear functions because cluster events can make these happen
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* in parallel so we want the transitions to be atomic. this also
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* means that any future flags osb_flags must be protected by spinlock
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* too! */
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static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
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unsigned long flag)
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{
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spin_lock(&osb->osb_lock);
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osb->osb_flags |= flag;
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spin_unlock(&osb->osb_lock);
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}
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static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
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int hard)
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{
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spin_lock(&osb->osb_lock);
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osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
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if (hard)
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osb->osb_flags |= OCFS2_OSB_HARD_RO;
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else
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osb->osb_flags |= OCFS2_OSB_SOFT_RO;
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spin_unlock(&osb->osb_lock);
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}
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static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
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{
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int ret;
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spin_lock(&osb->osb_lock);
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ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
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spin_unlock(&osb->osb_lock);
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return ret;
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}
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static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
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{
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int ret;
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spin_lock(&osb->osb_lock);
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ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
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spin_unlock(&osb->osb_lock);
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return ret;
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}
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#define OCFS2_IS_VALID_DINODE(ptr) \
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(!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
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#define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
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typeof(__di) ____di = (__di); \
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ocfs2_error((__sb), \
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"Dinode # %llu has bad signature %.*s", \
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(unsigned long long)(____di)->i_blkno, 7, \
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(____di)->i_signature); \
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} while (0);
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#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
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(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
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#define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
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typeof(__eb) ____eb = (__eb); \
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ocfs2_error((__sb), \
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"Extent Block # %llu has bad signature %.*s", \
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(unsigned long long)(____eb)->h_blkno, 7, \
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(____eb)->h_signature); \
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} while (0);
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#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
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(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
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#define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
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typeof(__gd) ____gd = (__gd); \
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ocfs2_error((__sb), \
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"Group Descriptor # %llu has bad signature %.*s", \
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(unsigned long long)(____gd)->bg_blkno, 7, \
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(____gd)->bg_signature); \
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} while (0);
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static inline unsigned long ino_from_blkno(struct super_block *sb,
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u64 blkno)
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{
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return (unsigned long)(blkno & (u64)ULONG_MAX);
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}
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static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
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u32 clusters)
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{
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int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
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sb->s_blocksize_bits;
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return (u64)clusters << c_to_b_bits;
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}
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static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
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u64 blocks)
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{
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int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
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sb->s_blocksize_bits;
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return (u32)(blocks >> b_to_c_bits);
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}
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static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
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u64 bytes)
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{
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int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
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unsigned int clusters;
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bytes += OCFS2_SB(sb)->s_clustersize - 1;
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/* OCFS2 just cannot have enough clusters to overflow this */
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clusters = (unsigned int)(bytes >> cl_bits);
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return clusters;
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}
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static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
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u64 bytes)
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{
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bytes += sb->s_blocksize - 1;
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return bytes >> sb->s_blocksize_bits;
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}
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static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
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u32 clusters)
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{
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return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
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}
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static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
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u64 bytes)
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{
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int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
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unsigned int clusters;
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clusters = ocfs2_clusters_for_bytes(sb, bytes);
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return (u64)clusters << cl_bits;
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}
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static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
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u64 bytes)
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{
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u64 blocks;
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blocks = ocfs2_blocks_for_bytes(sb, bytes);
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return blocks << sb->s_blocksize_bits;
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}
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static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
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{
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return (unsigned long)((bytes + 511) >> 9);
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}
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#define ocfs2_set_bit ext2_set_bit
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#define ocfs2_clear_bit ext2_clear_bit
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#define ocfs2_test_bit ext2_test_bit
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#define ocfs2_find_next_zero_bit ext2_find_next_zero_bit
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#endif /* OCFS2_H */
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