[net-next-2.6.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"

/* 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 recovery_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;
	s16 preferred_slot;
	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 dc_task_lock;
	struct task_struct *dc_task;
	wait_queue_head_t dc_event;
	unsigned long dc_wake_sequence;
	unsigned long dc_work_sequence;

	struct list_head blocked_lock_list;
	unsigned long blocked_lock_count;

	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;
}

static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
{
	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
		return 1;
	return 0;
}

static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
{
	/*
	 * Support for sparse files is a pre-requisite
	 */
	if (!ocfs2_sparse_alloc(osb))
		return 0;

	if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
		return 1;
	return 0;
}

static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
{
	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
		return 1;
	return 0;
}

/* 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)le64_to_cpu((____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)le64_to_cpu((____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)le64_to_cpu((____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);
}

static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
							unsigned long pg_index)
{
	u32 clusters = pg_index;
	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;

	if (unlikely(PAGE_CACHE_SHIFT > cbits))
		clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
	else if (PAGE_CACHE_SHIFT < cbits)
		clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);

	return clusters;
}

/*
 * Find the 1st page index which covers the given clusters.
 */
static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
							u32 clusters)
{
	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
        pgoff_t index = clusters;

	if (PAGE_CACHE_SHIFT > cbits) {
		index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
	} else if (PAGE_CACHE_SHIFT < cbits) {
		index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
	}

	return index;
}

static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
{
	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
	unsigned int pages_per_cluster = 1;

	if (PAGE_CACHE_SHIFT < cbits)
		pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);

	return pages_per_cluster;
}

#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
ccd979bd MF	49	/* Most user visible OCFS2 inodes will have very few pieces of
	50	* metadata, but larger files (including bitmaps, etc) must be taken
	51	* into account when designing an access scheme. We allow a small
	52	* amount of inlined blocks to be stored on an array and grow the
	53	* structure into a rb tree when necessary. */
	54	#define OCFS2_INODE_MAX_CACHE_ARRAY 2
	55
	56	struct ocfs2_caching_info {
	57	unsigned int ci_num_cached;
	58	union {
	59	sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY];
	60	struct rb_root ci_tree;
	61	} ci_cache;
	62	};
	63
	64	/* this limits us to 256 nodes
	65	* if we need more, we can do a kmalloc for the map */
	66	#define OCFS2_NODE_MAP_MAX_NODES 256
	67	struct ocfs2_node_map {
	68	u16 num_nodes;
	69	unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
	70	};
	71
	72	enum ocfs2_ast_action {
	73	OCFS2_AST_INVALID = 0,
	74	OCFS2_AST_ATTACH,
	75	OCFS2_AST_CONVERT,
	76	OCFS2_AST_DOWNCONVERT,
	77	};
	78
	79	/* actions for an unlockast function to take. */
	80	enum ocfs2_unlock_action {
	81	OCFS2_UNLOCK_INVALID = 0,
	82	OCFS2_UNLOCK_CANCEL_CONVERT,
	83	OCFS2_UNLOCK_DROP_LOCK,
	84	};
	85
	86	/* ocfs2_lock_res->l_flags flags. */
	87	#define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized
	88	* the lvb */
	89	#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
	90	* dlm_lock */
	91	#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
	92	* downconvert*/
	93	#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
	94	#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
	95	#define OCFS2_LOCK_REFRESHING (0x00000020)
	96	#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
	97	* for shutdown paths */
	98	#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
	99	* when to skip queueing
	100	* a lock because it's
	101	* about to be
	102	* dropped. */
	103	#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
	104
	105	struct ocfs2_lock_res_ops;
	106
	107	typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
	108
	109	struct ocfs2_lock_res {
	110	void *l_priv;
	111	struct ocfs2_lock_res_ops *l_ops;
	112	spinlock_t l_lock;
113
114	struct list_head l_blocked_list;
115	struct list_head l_mask_waiters;
116
117	enum ocfs2_lock_type l_type;
118	unsigned long l_flags;
119	char l_name[OCFS2_LOCK_ID_MAX_LEN];
120	int l_level;
121	unsigned int l_ro_holders;
122	unsigned int l_ex_holders;
123	struct dlm_lockstatus l_lksb;
124
125	/* used from AST/BAST funcs. */
126	enum ocfs2_ast_action l_action;
127	enum ocfs2_unlock_action l_unlock_action;
128	int l_requested;
129	int l_blocking;
130
131	wait_queue_head_t l_event;
132
133	struct list_head l_debug_list;
134	};
135
136	struct ocfs2_dlm_debug {
137	struct kref d_refcnt;
138	struct dentry *d_locking_state;
139	struct list_head d_lockres_tracking;
140	};
141
142	enum ocfs2_vol_state
143	{
144	VOLUME_INIT = 0,
145	VOLUME_MOUNTED,
146	VOLUME_DISMOUNTED,
147	VOLUME_DISABLED
148	};
149
150	struct ocfs2_alloc_stats
151	{
152	atomic_t moves;
153	atomic_t local_data;
154	atomic_t bitmap_data;
155	atomic_t bg_allocs;
156	atomic_t bg_extends;
157	};
158
159	enum ocfs2_local_alloc_state
160	{
161	OCFS2_LA_UNUSED = 0,
162	OCFS2_LA_ENABLED,
163	OCFS2_LA_DISABLED
164	};
165
166	enum ocfs2_mount_options
167	{
168	OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */
169	OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
170	OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
171	OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
172	OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
ccd979bd MF	173	};
	174
	175	#define OCFS2_OSB_SOFT_RO 0x0001
	176	#define OCFS2_OSB_HARD_RO 0x0002
	177	#define OCFS2_OSB_ERROR_FS 0x0004
7f1a37e3	178	#define OCFS2_DEFAULT_ATIME_QUANTUM 60
ccd979bd MF	179
ccd979bd MF	180	struct ocfs2_journal;
ccd979bd MF	181	struct ocfs2_super
ccd979bd MF	182	{
ccd979bd MF	183	struct task_struct *commit_task;
	184	struct super_block *sb;
	185	struct inode *root_inode;
	186	struct inode *sys_root_inode;
	187	struct inode *system_inodes[NUM_SYSTEM_INODES];
	188
	189	struct ocfs2_slot_info *slot_info;
	190
	191	spinlock_t node_map_lock;
ccd979bd	192	struct ocfs2_node_map recovery_map;
ccd979bd	193
ccd979bd MF	194	u64 root_blkno;
	195	u64 system_dir_blkno;
	196	u64 bitmap_blkno;
	197	u32 bitmap_cpg;
	198	u8 *uuid;
	199	char *uuid_str;
	200	u8 *vol_label;
	201	u64 first_cluster_group_blkno;
	202	u32 fs_generation;
	203
	204	u32 s_feature_compat;
	205	u32 s_feature_incompat;
	206	u32 s_feature_ro_compat;
	207
	208	/* Protects s_next_generaion, osb_flags. Could protect more on
	209	* osb as it's very short lived. */
	210	spinlock_t osb_lock;
	211	u32 s_next_generation;
	212	unsigned long osb_flags;
	213
	214	unsigned long s_mount_opt;
7f1a37e3	215	unsigned int s_atime_quantum;
ccd979bd MF	216
ccd979bd MF	217	u16 max_slots;
ccd979bd MF	218	s16 node_num;
ccd979bd MF	219	s16 slot_num;
baf4661a	220	s16 preferred_slot;
ccd979bd MF	221	int s_sectsize_bits;
	222	int s_clustersize;
	223	int s_clustersize_bits;
ccd979bd MF	224
ccd979bd MF	225	atomic_t vol_state;
c74ec2f7	226	struct mutex recovery_lock;
ccd979bd MF	227	struct task_struct *recovery_thread_task;
	228	int disable_recovery;
	229	wait_queue_head_t checkpoint_event;
	230	atomic_t needs_checkpoint;
	231	struct ocfs2_journal *journal;
	232
	233	enum ocfs2_local_alloc_state local_alloc_state;
	234	struct buffer_head *local_alloc_bh;
883d4cae	235	u64 la_last_gd;
ccd979bd MF	236
	237	/* Next two fields are for local node slot recovery during
	238	* mount. */
	239	int dirty;
	240	struct ocfs2_dinode *local_alloc_copy;
	241
	242	struct ocfs2_alloc_stats alloc_stats;
	243	char dev_str[20]; /* "major,minor" of the device */
	244
	245	struct dlm_ctxt *dlm;
	246	struct ocfs2_lock_res osb_super_lockres;
	247	struct ocfs2_lock_res osb_rename_lockres;
	248	struct dlm_eviction_cb osb_eviction_cb;
	249	struct ocfs2_dlm_debug *osb_dlm_debug;
	250
	251	struct dentry *osb_debug_root;
	252
	253	wait_queue_head_t recovery_event;
	254
34d024f8 MF	255	spinlock_t dc_task_lock;
	256	struct task_struct *dc_task;
	257	wait_queue_head_t dc_event;
	258	unsigned long dc_wake_sequence;
	259	unsigned long dc_work_sequence;
ccd979bd MF	260
	261	struct list_head blocked_lock_list;
	262	unsigned long blocked_lock_count;
	263
ccd979bd MF	264	wait_queue_head_t osb_mount_event;
	265
	266	/* Truncate log info */
	267	struct inode *osb_tl_inode;
	268	struct buffer_head *osb_tl_bh;
c4028958	269	struct delayed_work osb_truncate_log_wq;
b4df6ed8 MF	270
	271	struct ocfs2_node_map osb_recovering_orphan_dirs;
	272	unsigned int *osb_orphan_wipes;
	273	wait_queue_head_t osb_wipe_event;
ccd979bd MF	274	};
	275
	276	#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
ccd979bd MF	277
	278	static inline int ocfs2_should_order_data(struct inode *inode)
	279	{
	280	if (!S_ISREG(inode->i_mode))
	281	return 0;
	282	if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
	283	return 0;
	284	return 1;
	285	}
	286
dcd0538f MF	287	static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
	288	{
	289	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
	290	return 1;
	291	return 0;
	292	}
	293
328d5752 MF	294	static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
	295	{
	296	/*
	297	* Support for sparse files is a pre-requisite
	298	*/
	299	if (!ocfs2_sparse_alloc(osb))
	300	return 0;
	301
	302	if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
	303	return 1;
	304	return 0;
	305	}
	306
15b1e36b MF	307	static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
	308	{
	309	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
	310	return 1;
	311	return 0;
	312	}
	313
ccd979bd MF	314	/* set / clear functions because cluster events can make these happen
	315	* in parallel so we want the transitions to be atomic. this also
	316	* means that any future flags osb_flags must be protected by spinlock
	317	* too! */
	318	static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
	319	unsigned long flag)
	320	{
	321	spin_lock(&osb->osb_lock);
	322	osb->osb_flags \|= flag;
	323	spin_unlock(&osb->osb_lock);
	324	}
	325
	326	static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
	327	int hard)
	328	{
	329	spin_lock(&osb->osb_lock);
	330	osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO\|OCFS2_OSB_HARD_RO);
	331	if (hard)
	332	osb->osb_flags \|= OCFS2_OSB_HARD_RO;
	333	else
	334	osb->osb_flags \|= OCFS2_OSB_SOFT_RO;
	335	spin_unlock(&osb->osb_lock);
	336	}
	337
	338	static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
	339	{
	340	int ret;
	341
	342	spin_lock(&osb->osb_lock);
	343	ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
	344	spin_unlock(&osb->osb_lock);
	345
	346	return ret;
	347	}
	348
	349	static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
	350	{
	351	int ret;
	352
	353	spin_lock(&osb->osb_lock);
	354	ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
	355	spin_unlock(&osb->osb_lock);
	356
	357	return ret;
	358	}
	359
c271c5c2 SM	360	static inline int ocfs2_mount_local(struct ocfs2_super *osb)
	361	{
	362	return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
	363	}
	364
ccd979bd MF	365	#define OCFS2_IS_VALID_DINODE(ptr) \
	366	(!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
	367
	368	#define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
	369	typeof(__di) ____di = (__di); \
	370	ocfs2_error((__sb), \
b0697053	371	"Dinode # %llu has bad signature %.*s", \
1ca1a111	372	(unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \
ccd979bd	373	(____di)->i_signature); \
1ca1a111	374	} while (0)
ccd979bd MF	375
	376	#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
	377	(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
	378
	379	#define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
	380	typeof(__eb) ____eb = (__eb); \
	381	ocfs2_error((__sb), \
b0697053	382	"Extent Block # %llu has bad signature %.*s", \
1ca1a111	383	(unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \
ccd979bd	384	(____eb)->h_signature); \
1ca1a111	385	} while (0)
ccd979bd MF	386
	387	#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
	388	(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
	389
	390	#define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
	391	typeof(__gd) ____gd = (__gd); \
	392	ocfs2_error((__sb), \
b0697053	393	"Group Descriptor # %llu has bad signature %.*s", \
1ca1a111	394	(unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \
ccd979bd	395	(____gd)->bg_signature); \
1ca1a111	396	} while (0)
ccd979bd MF	397
	398	static inline unsigned long ino_from_blkno(struct super_block *sb,
	399	u64 blkno)
	400	{
	401	return (unsigned long)(blkno & (u64)ULONG_MAX);
	402	}
	403
	404	static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
	405	u32 clusters)
	406	{
	407	int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
	408	sb->s_blocksize_bits;
	409
	410	return (u64)clusters << c_to_b_bits;
	411	}
	412
	413	static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
	414	u64 blocks)
	415	{
	416	int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
	417	sb->s_blocksize_bits;
	418
	419	return (u32)(blocks >> b_to_c_bits);
	420	}
	421
	422	static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
	423	u64 bytes)
	424	{
	425	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
	426	unsigned int clusters;
	427
	428	bytes += OCFS2_SB(sb)->s_clustersize - 1;
	429	/* OCFS2 just cannot have enough clusters to overflow this */
	430	clusters = (unsigned int)(bytes >> cl_bits);
	431
	432	return clusters;
	433	}
	434
	435	static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
	436	u64 bytes)
	437	{
	438	bytes += sb->s_blocksize - 1;
	439	return bytes >> sb->s_blocksize_bits;
	440	}
	441
	442	static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
	443	u32 clusters)
	444	{
	445	return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
	446	}
	447
	448	static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
	449	u64 bytes)
	450	{
	451	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
	452	unsigned int clusters;
	453
	454	clusters = ocfs2_clusters_for_bytes(sb, bytes);
	455	return (u64)clusters << cl_bits;
	456	}
	457
	458	static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
	459	u64 bytes)
	460	{
461	u64 blocks;
462
463	blocks = ocfs2_blocks_for_bytes(sb, bytes);
464	return blocks << sb->s_blocksize_bits;
465	}
466
467	static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
468	{
469	return (unsigned long)((bytes + 511) >> 9);
470	}
471
9517bac6 MF	472	static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
	473	unsigned long pg_index)
	474	{
	475	u32 clusters = pg_index;
	476	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
	477
	478	if (unlikely(PAGE_CACHE_SHIFT > cbits))
	479	clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
	480	else if (PAGE_CACHE_SHIFT < cbits)
	481	clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
	482
	483	return clusters;
	484	}
	485
	486	/*
	487	* Find the 1st page index which covers the given clusters.
	488	*/
7c08d70c	489	static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
9517bac6 MF	490	u32 clusters)
	491	{
	492	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
7c08d70c	493	pgoff_t index = clusters;
9517bac6 MF	494
9517bac6 MF	495	if (PAGE_CACHE_SHIFT > cbits) {
7c08d70c	496	index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
9517bac6	497	} else if (PAGE_CACHE_SHIFT < cbits) {
7c08d70c	498	index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
9517bac6 MF	499	}
	500
	501	return index;
	502	}
	503
60b11392 MF	504	static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
	505	{
	506	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
	507	unsigned int pages_per_cluster = 1;
	508
	509	if (PAGE_CACHE_SHIFT < cbits)
	510	pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
	511
	512	return pages_per_cluster;
	513	}
	514
ccd979bd MF	515	#define ocfs2_set_bit ext2_set_bit
	516	#define ocfs2_clear_bit ext2_clear_bit
	517	#define ocfs2_test_bit ext2_test_bit
	518	#define ocfs2_find_next_zero_bit ext2_find_next_zero_bit
	519	#endif /* OCFS2_H */
	520