[linux.git] / fs / ocfs2 / ocfs2.h

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * ocfs2.h
 *
 * Defines macros and structures used in OCFS2
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef OCFS2_H
#define OCFS2_H

#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/rbtree.h>
#include <linux/workqueue.h>
#include <linux/kref.h>
#include <linux/mutex.h>
#include <linux/jbd.h>

#include "cluster/nodemanager.h"
#include "cluster/heartbeat.h"
#include "cluster/tcp.h"

#include "dlm/dlmapi.h"

#include "ocfs2_fs.h"
#include "endian.h"
#include "ocfs2_lockid.h"

struct ocfs2_extent_map {
	u32		em_clusters;
	struct rb_root	em_extents;
};

/* Most user visible OCFS2 inodes will have very few pieces of
 * metadata, but larger files (including bitmaps, etc) must be taken
 * into account when designing an access scheme. We allow a small
 * amount of inlined blocks to be stored on an array and grow the
 * structure into a rb tree when necessary. */
#define OCFS2_INODE_MAX_CACHE_ARRAY 2

struct ocfs2_caching_info {
	unsigned int		ci_num_cached;
	union {
		sector_t	ci_array[OCFS2_INODE_MAX_CACHE_ARRAY];
		struct rb_root	ci_tree;
	} ci_cache;
};

/* this limits us to 256 nodes
 * if we need more, we can do a kmalloc for the map */
#define OCFS2_NODE_MAP_MAX_NODES    256
struct ocfs2_node_map {
	u16 num_nodes;
	unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
};

enum ocfs2_ast_action {
	OCFS2_AST_INVALID = 0,
	OCFS2_AST_ATTACH,
	OCFS2_AST_CONVERT,
	OCFS2_AST_DOWNCONVERT,
};

/* actions for an unlockast function to take. */
enum ocfs2_unlock_action {
	OCFS2_UNLOCK_INVALID = 0,
	OCFS2_UNLOCK_CANCEL_CONVERT,
	OCFS2_UNLOCK_DROP_LOCK,
};

/* ocfs2_lock_res->l_flags flags. */
#define OCFS2_LOCK_ATTACHED      (0x00000001) /* have we initialized
					       * the lvb */
#define OCFS2_LOCK_BUSY          (0x00000002) /* we are currently in
					       * dlm_lock */
#define OCFS2_LOCK_BLOCKED       (0x00000004) /* blocked waiting to
					       * downconvert*/
#define OCFS2_LOCK_LOCAL         (0x00000008) /* newly created inode */
#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
#define OCFS2_LOCK_REFRESHING    (0x00000020)
#define OCFS2_LOCK_INITIALIZED   (0x00000040) /* track initialization
					       * for shutdown paths */
#define OCFS2_LOCK_FREEING       (0x00000080) /* help dlmglue track
					       * when to skip queueing
					       * a lock because it's
					       * about to be
					       * dropped. */
#define OCFS2_LOCK_QUEUED        (0x00000100) /* queued for downconvert */

struct ocfs2_lock_res_ops;

typedef void (*ocfs2_lock_callback)(int status, unsigned long data);

struct ocfs2_lock_res {
	void                    *l_priv;
	struct ocfs2_lock_res_ops *l_ops;
	spinlock_t               l_lock;

	struct list_head         l_blocked_list;
	struct list_head         l_mask_waiters;

	enum ocfs2_lock_type     l_type;
	unsigned long		 l_flags;
	char                     l_name[OCFS2_LOCK_ID_MAX_LEN];
	int                      l_level;
	unsigned int             l_ro_holders;
	unsigned int             l_ex_holders;
	struct dlm_lockstatus    l_lksb;

	/* used from AST/BAST funcs. */
	enum ocfs2_ast_action    l_action;
	enum ocfs2_unlock_action l_unlock_action;
	int                      l_requested;
	int                      l_blocking;

	wait_queue_head_t        l_event;

	struct list_head         l_debug_list;
};

struct ocfs2_dlm_debug {
	struct kref d_refcnt;
	struct dentry *d_locking_state;
	struct list_head d_lockres_tracking;
};

enum ocfs2_vol_state
{
	VOLUME_INIT = 0,
	VOLUME_MOUNTED,
	VOLUME_DISMOUNTED,
	VOLUME_DISABLED
};

struct ocfs2_alloc_stats
{
	atomic_t moves;
	atomic_t local_data;
	atomic_t bitmap_data;
	atomic_t bg_allocs;
	atomic_t bg_extends;
};

enum ocfs2_local_alloc_state
{
	OCFS2_LA_UNUSED = 0,
	OCFS2_LA_ENABLED,
	OCFS2_LA_DISABLED
};

enum ocfs2_mount_options
{
	OCFS2_MOUNT_HB_LOCAL   = 1 << 0, /* Heartbeat started in local mode */
	OCFS2_MOUNT_BARRIER = 1 << 1,	/* Use block barriers */
	OCFS2_MOUNT_NOINTR  = 1 << 2,   /* Don't catch signals */
	OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
	OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
};

#define OCFS2_OSB_SOFT_RO	0x0001
#define OCFS2_OSB_HARD_RO	0x0002
#define OCFS2_OSB_ERROR_FS	0x0004
#define OCFS2_DEFAULT_ATIME_QUANTUM	60

struct ocfs2_journal;
struct ocfs2_super
{
	struct task_struct *commit_task;
	struct super_block *sb;
	struct inode *root_inode;
	struct inode *sys_root_inode;
	struct inode *system_inodes[NUM_SYSTEM_INODES];

	struct ocfs2_slot_info *slot_info;

	spinlock_t node_map_lock;
	struct ocfs2_node_map mounted_map;
	struct ocfs2_node_map recovery_map;
	struct ocfs2_node_map umount_map;

	u64 root_blkno;
	u64 system_dir_blkno;
	u64 bitmap_blkno;
	u32 bitmap_cpg;
	u8 *uuid;
	char *uuid_str;
	u8 *vol_label;
	u64 first_cluster_group_blkno;
	u32 fs_generation;

	u32 s_feature_compat;
	u32 s_feature_incompat;
	u32 s_feature_ro_compat;

	/* Protects s_next_generaion, osb_flags. Could protect more on
	 * osb as it's very short lived. */
	spinlock_t osb_lock;
	u32 s_next_generation;
	unsigned long osb_flags;

	unsigned long s_mount_opt;
	unsigned int s_atime_quantum;

	u16 max_slots;
	s16 node_num;
	s16 slot_num;
	int s_sectsize_bits;
	int s_clustersize;
	int s_clustersize_bits;

	atomic_t vol_state;
	struct mutex recovery_lock;
	struct task_struct *recovery_thread_task;
	int disable_recovery;
	wait_queue_head_t checkpoint_event;
	atomic_t needs_checkpoint;
	struct ocfs2_journal *journal;

	enum ocfs2_local_alloc_state local_alloc_state;
	struct buffer_head *local_alloc_bh;
	u64 la_last_gd;

	/* Next two fields are for local node slot recovery during
	 * mount. */
	int dirty;
	struct ocfs2_dinode *local_alloc_copy;

	struct ocfs2_alloc_stats alloc_stats;
	char dev_str[20];		/* "major,minor" of the device */

	struct dlm_ctxt *dlm;
	struct ocfs2_lock_res osb_super_lockres;
	struct ocfs2_lock_res osb_rename_lockres;
	struct dlm_eviction_cb osb_eviction_cb;
	struct ocfs2_dlm_debug *osb_dlm_debug;

	struct dentry *osb_debug_root;

	wait_queue_head_t recovery_event;

	spinlock_t vote_task_lock;
	struct task_struct *vote_task;
	wait_queue_head_t vote_event;
	unsigned long vote_wake_sequence;
	unsigned long vote_work_sequence;

	struct list_head blocked_lock_list;
	unsigned long blocked_lock_count;

	struct list_head vote_list;
	int vote_count;

	u32 net_key;
	spinlock_t net_response_lock;
	unsigned int net_response_ids;
	struct list_head net_response_list;

	struct o2hb_callback_func osb_hb_up;
	struct o2hb_callback_func osb_hb_down;

	struct list_head	osb_net_handlers;

	wait_queue_head_t		osb_mount_event;

	/* Truncate log info */
	struct inode			*osb_tl_inode;
	struct buffer_head		*osb_tl_bh;
	struct delayed_work		osb_truncate_log_wq;

	struct ocfs2_node_map		osb_recovering_orphan_dirs;
	unsigned int			*osb_orphan_wipes;
	wait_queue_head_t		osb_wipe_event;
};

#define OCFS2_SB(sb)	    ((struct ocfs2_super *)(sb)->s_fs_info)

static inline int ocfs2_should_order_data(struct inode *inode)
{
	if (!S_ISREG(inode->i_mode))
		return 0;
	if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
		return 0;
	return 1;
}

/* set / clear functions because cluster events can make these happen
 * in parallel so we want the transitions to be atomic. this also
 * means that any future flags osb_flags must be protected by spinlock
 * too! */
static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
				      unsigned long flag)
{
	spin_lock(&osb->osb_lock);
	osb->osb_flags |= flag;
	spin_unlock(&osb->osb_lock);
}

static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
				     int hard)
{
	spin_lock(&osb->osb_lock);
	osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
	if (hard)
		osb->osb_flags |= OCFS2_OSB_HARD_RO;
	else
		osb->osb_flags |= OCFS2_OSB_SOFT_RO;
	spin_unlock(&osb->osb_lock);
}

static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
{
	int ret;

	spin_lock(&osb->osb_lock);
	ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
	spin_unlock(&osb->osb_lock);

	return ret;
}

static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
{
	int ret;

	spin_lock(&osb->osb_lock);
	ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
	spin_unlock(&osb->osb_lock);

	return ret;
}

static inline int ocfs2_mount_local(struct ocfs2_super *osb)
{
	return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
}

#define OCFS2_IS_VALID_DINODE(ptr)					\
	(!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))

#define OCFS2_RO_ON_INVALID_DINODE(__sb, __di)	do {			\
	typeof(__di) ____di = (__di);					\
	ocfs2_error((__sb), 						\
		"Dinode # %llu has bad signature %.*s",			\
		(unsigned long long)(____di)->i_blkno, 7,		\
		(____di)->i_signature);					\
} while (0);

#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr)				\
	(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))

#define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb)	do {		\
	typeof(__eb) ____eb = (__eb);					\
	ocfs2_error((__sb), 						\
		"Extent Block # %llu has bad signature %.*s",		\
		(unsigned long long)(____eb)->h_blkno, 7,		\
		(____eb)->h_signature);					\
} while (0);

#define OCFS2_IS_VALID_GROUP_DESC(ptr)					\
	(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))

#define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd)	do {		\
	typeof(__gd) ____gd = (__gd);					\
		ocfs2_error((__sb),					\
		"Group Descriptor # %llu has bad signature %.*s",	\
		(unsigned long long)(____gd)->bg_blkno, 7,		\
		(____gd)->bg_signature);				\
} while (0);

static inline unsigned long ino_from_blkno(struct super_block *sb,
					   u64 blkno)
{
	return (unsigned long)(blkno & (u64)ULONG_MAX);
}

static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
					   u32 clusters)
{
	int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
		sb->s_blocksize_bits;

	return (u64)clusters << c_to_b_bits;
}

static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
					   u64 blocks)
{
	int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
		sb->s_blocksize_bits;

	return (u32)(blocks >> b_to_c_bits);
}

static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
						    u64 bytes)
{
	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
	unsigned int clusters;

	bytes += OCFS2_SB(sb)->s_clustersize - 1;
	/* OCFS2 just cannot have enough clusters to overflow this */
	clusters = (unsigned int)(bytes >> cl_bits);

	return clusters;
}

static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
					 u64 bytes)
{
	bytes += sb->s_blocksize - 1;
	return bytes >> sb->s_blocksize_bits;
}

static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
					  u32 clusters)
{
	return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
}

static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
						u64 bytes)
{
	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
	unsigned int clusters;

	clusters = ocfs2_clusters_for_bytes(sb, bytes);
	return (u64)clusters << cl_bits;
}

static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
					      u64 bytes)
{
	u64 blocks;

        blocks = ocfs2_blocks_for_bytes(sb, bytes);
	return blocks << sb->s_blocksize_bits;
}

static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
{
	return (unsigned long)((bytes + 511) >> 9);
}

#define ocfs2_set_bit ext2_set_bit
#define ocfs2_clear_bit ext2_clear_bit
#define ocfs2_test_bit ext2_test_bit
#define ocfs2_find_next_zero_bit ext2_find_next_zero_bit
#endif  /* OCFS2_H */
Commit	Line	Data
ccd979bd MF	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* ocfs2.h
	5	*
	6	* Defines macros and structures used in OCFS2
	7	*
	8	* Copyright (C) 2002, 2004 Oracle. All rights reserved.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public
	12	* License as published by the Free Software Foundation; either
	13	* version 2 of the License, or (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public
	21	* License along with this program; if not, write to the
	22	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	23	* Boston, MA 021110-1307, USA.
	24	*/
	25
	26	#ifndef OCFS2_H
	27	#define OCFS2_H
	28
	29	#include <linux/spinlock.h>
	30	#include <linux/sched.h>
	31	#include <linux/wait.h>
	32	#include <linux/list.h>
	33	#include <linux/rbtree.h>
	34	#include <linux/workqueue.h>
	35	#include <linux/kref.h>
c74ec2f7	36	#include <linux/mutex.h>
1fabe148	37	#include <linux/jbd.h>
ccd979bd MF	38
	39	#include "cluster/nodemanager.h"
	40	#include "cluster/heartbeat.h"
	41	#include "cluster/tcp.h"
	42
	43	#include "dlm/dlmapi.h"
	44
	45	#include "ocfs2_fs.h"
	46	#include "endian.h"
	47	#include "ocfs2_lockid.h"
	48
	49	struct ocfs2_extent_map {
	50	u32 em_clusters;
	51	struct rb_root em_extents;
	52	};
	53
	54	/* Most user visible OCFS2 inodes will have very few pieces of
	55	* metadata, but larger files (including bitmaps, etc) must be taken
	56	* into account when designing an access scheme. We allow a small
	57	* amount of inlined blocks to be stored on an array and grow the
	58	* structure into a rb tree when necessary. */
	59	#define OCFS2_INODE_MAX_CACHE_ARRAY 2
	60
	61	struct ocfs2_caching_info {
	62	unsigned int ci_num_cached;
	63	union {
	64	sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY];
	65	struct rb_root ci_tree;
	66	} ci_cache;
	67	};
	68
	69	/* this limits us to 256 nodes
	70	* if we need more, we can do a kmalloc for the map */
	71	#define OCFS2_NODE_MAP_MAX_NODES 256
	72	struct ocfs2_node_map {
	73	u16 num_nodes;
	74	unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
	75	};
	76
	77	enum ocfs2_ast_action {
	78	OCFS2_AST_INVALID = 0,
	79	OCFS2_AST_ATTACH,
	80	OCFS2_AST_CONVERT,
	81	OCFS2_AST_DOWNCONVERT,
	82	};
	83
	84	/* actions for an unlockast function to take. */
	85	enum ocfs2_unlock_action {
	86	OCFS2_UNLOCK_INVALID = 0,
	87	OCFS2_UNLOCK_CANCEL_CONVERT,
	88	OCFS2_UNLOCK_DROP_LOCK,
	89	};
	90
	91	/* ocfs2_lock_res->l_flags flags. */
	92	#define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized
	93	* the lvb */
	94	#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
	95	* dlm_lock */
	96	#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
	97	* downconvert*/
	98	#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
	99	#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
	100	#define OCFS2_LOCK_REFRESHING (0x00000020)
	101	#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
102	* for shutdown paths */
103	#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
104	* when to skip queueing
105	* a lock because it's
106	* about to be
107	* dropped. */
108	#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
109
110	struct ocfs2_lock_res_ops;
111
112	typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
113
114	struct ocfs2_lock_res {
115	void *l_priv;
116	struct ocfs2_lock_res_ops *l_ops;
117	spinlock_t l_lock;
118
119	struct list_head l_blocked_list;
120	struct list_head l_mask_waiters;
121
122	enum ocfs2_lock_type l_type;
123	unsigned long l_flags;
124	char l_name[OCFS2_LOCK_ID_MAX_LEN];
125	int l_level;
126	unsigned int l_ro_holders;
127	unsigned int l_ex_holders;
128	struct dlm_lockstatus l_lksb;
129
130	/* used from AST/BAST funcs. */
131	enum ocfs2_ast_action l_action;
132	enum ocfs2_unlock_action l_unlock_action;
133	int l_requested;
134	int l_blocking;
135
136	wait_queue_head_t l_event;
137
138	struct list_head l_debug_list;
139	};
140
141	struct ocfs2_dlm_debug {
142	struct kref d_refcnt;
143	struct dentry *d_locking_state;
144	struct list_head d_lockres_tracking;
145	};
146
147	enum ocfs2_vol_state
148	{
149	VOLUME_INIT = 0,
150	VOLUME_MOUNTED,
151	VOLUME_DISMOUNTED,
152	VOLUME_DISABLED
153	};
154
155	struct ocfs2_alloc_stats
156	{
157	atomic_t moves;
158	atomic_t local_data;
159	atomic_t bitmap_data;
160	atomic_t bg_allocs;
161	atomic_t bg_extends;
162	};
163
164	enum ocfs2_local_alloc_state
165	{
166	OCFS2_LA_UNUSED = 0,
167	OCFS2_LA_ENABLED,
168	OCFS2_LA_DISABLED
169	};
170
171	enum ocfs2_mount_options
172	{
173	OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */
174	OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
175	OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
176	OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
177	OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
ccd979bd MF	178	};
	179
	180	#define OCFS2_OSB_SOFT_RO 0x0001
	181	#define OCFS2_OSB_HARD_RO 0x0002
	182	#define OCFS2_OSB_ERROR_FS 0x0004
7f1a37e3	183	#define OCFS2_DEFAULT_ATIME_QUANTUM 60
ccd979bd MF	184
ccd979bd MF	185	struct ocfs2_journal;
ccd979bd MF	186	struct ocfs2_super
ccd979bd MF	187	{
ccd979bd MF	188	struct task_struct *commit_task;
	189	struct super_block *sb;
	190	struct inode *root_inode;
	191	struct inode *sys_root_inode;
	192	struct inode *system_inodes[NUM_SYSTEM_INODES];
	193
	194	struct ocfs2_slot_info *slot_info;
	195
	196	spinlock_t node_map_lock;
	197	struct ocfs2_node_map mounted_map;
	198	struct ocfs2_node_map recovery_map;
	199	struct ocfs2_node_map umount_map;
	200
ccd979bd MF	201	u64 root_blkno;
	202	u64 system_dir_blkno;
	203	u64 bitmap_blkno;
	204	u32 bitmap_cpg;
	205	u8 *uuid;
	206	char *uuid_str;
	207	u8 *vol_label;
	208	u64 first_cluster_group_blkno;
	209	u32 fs_generation;
	210
	211	u32 s_feature_compat;
	212	u32 s_feature_incompat;
	213	u32 s_feature_ro_compat;
	214
	215	/* Protects s_next_generaion, osb_flags. Could protect more on
	216	* osb as it's very short lived. */
	217	spinlock_t osb_lock;
	218	u32 s_next_generation;
	219	unsigned long osb_flags;
	220
	221	unsigned long s_mount_opt;
7f1a37e3	222	unsigned int s_atime_quantum;
ccd979bd MF	223
ccd979bd MF	224	u16 max_slots;
ccd979bd MF	225	s16 node_num;
	226	s16 slot_num;
	227	int s_sectsize_bits;
	228	int s_clustersize;
	229	int s_clustersize_bits;
ccd979bd MF	230
ccd979bd MF	231	atomic_t vol_state;
c74ec2f7	232	struct mutex recovery_lock;
ccd979bd MF	233	struct task_struct *recovery_thread_task;
	234	int disable_recovery;
	235	wait_queue_head_t checkpoint_event;
	236	atomic_t needs_checkpoint;
	237	struct ocfs2_journal *journal;
	238
	239	enum ocfs2_local_alloc_state local_alloc_state;
	240	struct buffer_head *local_alloc_bh;
883d4cae	241	u64 la_last_gd;
ccd979bd MF	242
	243	/* Next two fields are for local node slot recovery during
	244	* mount. */
	245	int dirty;
	246	struct ocfs2_dinode *local_alloc_copy;
	247
	248	struct ocfs2_alloc_stats alloc_stats;
	249	char dev_str[20]; /* "major,minor" of the device */
	250
	251	struct dlm_ctxt *dlm;
	252	struct ocfs2_lock_res osb_super_lockres;
	253	struct ocfs2_lock_res osb_rename_lockres;
	254	struct dlm_eviction_cb osb_eviction_cb;
	255	struct ocfs2_dlm_debug *osb_dlm_debug;
	256
	257	struct dentry *osb_debug_root;
	258
	259	wait_queue_head_t recovery_event;
	260
	261	spinlock_t vote_task_lock;
	262	struct task_struct *vote_task;
	263	wait_queue_head_t vote_event;
	264	unsigned long vote_wake_sequence;
	265	unsigned long vote_work_sequence;
	266
	267	struct list_head blocked_lock_list;
	268	unsigned long blocked_lock_count;
	269
	270	struct list_head vote_list;
	271	int vote_count;
	272
	273	u32 net_key;
	274	spinlock_t net_response_lock;
	275	unsigned int net_response_ids;
	276	struct list_head net_response_list;
	277
	278	struct o2hb_callback_func osb_hb_up;
	279	struct o2hb_callback_func osb_hb_down;
	280
	281	struct list_head osb_net_handlers;
	282
	283	wait_queue_head_t osb_mount_event;
	284
	285	/* Truncate log info */
	286	struct inode *osb_tl_inode;
	287	struct buffer_head *osb_tl_bh;
c4028958	288	struct delayed_work osb_truncate_log_wq;
b4df6ed8 MF	289
	290	struct ocfs2_node_map osb_recovering_orphan_dirs;
	291	unsigned int *osb_orphan_wipes;
	292	wait_queue_head_t osb_wipe_event;
ccd979bd MF	293	};
	294
	295	#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
ccd979bd MF	296
	297	static inline int ocfs2_should_order_data(struct inode *inode)
	298	{
	299	if (!S_ISREG(inode->i_mode))
	300	return 0;
	301	if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
	302	return 0;
	303	return 1;
	304	}
	305
	306	/* set / clear functions because cluster events can make these happen
	307	* in parallel so we want the transitions to be atomic. this also
	308	* means that any future flags osb_flags must be protected by spinlock
	309	* too! */
	310	static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
	311	unsigned long flag)
	312	{
	313	spin_lock(&osb->osb_lock);
	314	osb->osb_flags \|= flag;
	315	spin_unlock(&osb->osb_lock);
	316	}
	317
	318	static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
	319	int hard)
	320	{
	321	spin_lock(&osb->osb_lock);
	322	osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO\|OCFS2_OSB_HARD_RO);
	323	if (hard)
	324	osb->osb_flags \|= OCFS2_OSB_HARD_RO;
	325	else
	326	osb->osb_flags \|= OCFS2_OSB_SOFT_RO;
	327	spin_unlock(&osb->osb_lock);
	328	}
	329
	330	static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
	331	{
	332	int ret;
	333
	334	spin_lock(&osb->osb_lock);
	335	ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
	336	spin_unlock(&osb->osb_lock);
	337
	338	return ret;
	339	}
	340
	341	static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
	342	{
	343	int ret;
	344
	345	spin_lock(&osb->osb_lock);
	346	ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
	347	spin_unlock(&osb->osb_lock);
	348
	349	return ret;
	350	}
	351
c271c5c2 SM	352	static inline int ocfs2_mount_local(struct ocfs2_super *osb)
	353	{
	354	return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
	355	}
	356
ccd979bd MF	357	#define OCFS2_IS_VALID_DINODE(ptr) \
	358	(!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
	359
	360	#define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
	361	typeof(__di) ____di = (__di); \
	362	ocfs2_error((__sb), \
b0697053 MF	363	"Dinode # %llu has bad signature %.*s", \
b0697053 MF	364	(unsigned long long)(____di)->i_blkno, 7, \
ccd979bd MF	365	(____di)->i_signature); \
	366	} while (0);
	367
	368	#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
	369	(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
	370
	371	#define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
	372	typeof(__eb) ____eb = (__eb); \
	373	ocfs2_error((__sb), \
b0697053 MF	374	"Extent Block # %llu has bad signature %.*s", \
b0697053 MF	375	(unsigned long long)(____eb)->h_blkno, 7, \
ccd979bd MF	376	(____eb)->h_signature); \
	377	} while (0);
	378
	379	#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
	380	(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
	381
	382	#define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
	383	typeof(__gd) ____gd = (__gd); \
	384	ocfs2_error((__sb), \
b0697053 MF	385	"Group Descriptor # %llu has bad signature %.*s", \
b0697053 MF	386	(unsigned long long)(____gd)->bg_blkno, 7, \
ccd979bd MF	387	(____gd)->bg_signature); \
	388	} while (0);
	389
	390	static inline unsigned long ino_from_blkno(struct super_block *sb,
	391	u64 blkno)
	392	{
	393	return (unsigned long)(blkno & (u64)ULONG_MAX);
	394	}
	395
	396	static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
	397	u32 clusters)
	398	{
	399	int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
	400	sb->s_blocksize_bits;
	401
	402	return (u64)clusters << c_to_b_bits;
	403	}
	404
	405	static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
	406	u64 blocks)
	407	{
	408	int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
	409	sb->s_blocksize_bits;
	410
	411	return (u32)(blocks >> b_to_c_bits);
	412	}
	413
	414	static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
	415	u64 bytes)
	416	{
	417	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
	418	unsigned int clusters;
	419
	420	bytes += OCFS2_SB(sb)->s_clustersize - 1;
	421	/* OCFS2 just cannot have enough clusters to overflow this */
	422	clusters = (unsigned int)(bytes >> cl_bits);
	423
	424	return clusters;
	425	}
	426
	427	static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
	428	u64 bytes)
	429	{
	430	bytes += sb->s_blocksize - 1;
	431	return bytes >> sb->s_blocksize_bits;
	432	}
	433
	434	static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
	435	u32 clusters)
	436	{
	437	return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
	438	}
	439
	440	static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
	441	u64 bytes)
	442	{
	443	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
	444	unsigned int clusters;
	445
	446	clusters = ocfs2_clusters_for_bytes(sb, bytes);
	447	return (u64)clusters << cl_bits;
	448	}
	449
	450	static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
451	u64 bytes)
452	{
453	u64 blocks;
454
455	blocks = ocfs2_blocks_for_bytes(sb, bytes);
456	return blocks << sb->s_blocksize_bits;
457	}
458
459	static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
460	{
461	return (unsigned long)((bytes + 511) >> 9);
462	}
463
464	#define ocfs2_set_bit ext2_set_bit
465	#define ocfs2_clear_bit ext2_clear_bit
466	#define ocfs2_test_bit ext2_test_bit
467	#define ocfs2_find_next_zero_bit ext2_find_next_zero_bit
468	#endif /* OCFS2_H */
469