[mirror_ubuntu-artful-kernel.git] / fs / ocfs2 / inode.h

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * inode.h
 *
 * Function prototypes
 *
 * 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_INODE_H
#define OCFS2_INODE_H

#include "extent_map.h"

/* OCFS2 Inode Private Data */
struct ocfs2_inode_info
{
	u64			ip_blkno;

	struct ocfs2_lock_res		ip_rw_lockres;
	struct ocfs2_lock_res		ip_inode_lockres;
	struct ocfs2_lock_res		ip_open_lockres;

	/* protects allocation changes on this inode. */
	struct rw_semaphore		ip_alloc_sem;

	/* protects extended attribute changes on this inode */
	struct rw_semaphore		ip_xattr_sem;

	/* Number of outstanding AIO's which are not page aligned */
	atomic_t			ip_unaligned_aio;

	/* These fields are protected by ip_lock */
	spinlock_t			ip_lock;
	u32				ip_open_count;
	struct list_head		ip_io_markers;
	u32				ip_clusters;

	u16				ip_dyn_features;
	struct mutex			ip_io_mutex;
	u32				ip_flags; /* see below */
	u32				ip_attr; /* inode attributes */

	/* protected by recovery_lock. */
	struct inode			*ip_next_orphan;

	struct ocfs2_caching_info	ip_metadata_cache;
	struct ocfs2_extent_map		ip_extent_map;
	struct inode			vfs_inode;
	struct jbd2_inode		ip_jinode;

	u32				ip_dir_start_lookup;

	/* Only valid if the inode is the dir. */
	u32				ip_last_used_slot;
	u64				ip_last_used_group;
	u32				ip_dir_lock_gen;

	struct ocfs2_alloc_reservation	ip_la_data_resv;
};

/*
 * Flags for the ip_flags field
 */
/* System file inodes  */
#define OCFS2_INODE_SYSTEM_FILE		0x00000001
#define OCFS2_INODE_JOURNAL		0x00000002
#define OCFS2_INODE_BITMAP		0x00000004
/* This inode has been wiped from disk */
#define OCFS2_INODE_DELETED		0x00000008
/* Another node is deleting, so our delete is a nop */
#define OCFS2_INODE_SKIP_DELETE		0x00000010
/* Has the inode been orphaned on another node?
 *
 * This hints to ocfs2_drop_inode that it should clear i_nlink before
 * continuing.
 *
 * We *only* set this on unlink vote from another node. If the inode
 * was locally orphaned, then we're sure of the state and don't need
 * to twiddle i_nlink later - it's either zero or not depending on
 * whether our unlink succeeded. Otherwise we got this from a node
 * whose intention was to orphan the inode, however he may have
 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
 * rely on ocfs2_delete_inode to sort things out under the proper
 * cluster locks.
 */
#define OCFS2_INODE_MAYBE_ORPHANED	0x00000020
/* Does someone have the file open O_DIRECT */
#define OCFS2_INODE_OPEN_DIRECT		0x00000040
/* Tell the inode wipe code it's not in orphan dir */
#define OCFS2_INODE_SKIP_ORPHAN_DIR     0x00000080

static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
{
	return container_of(inode, struct ocfs2_inode_info, vfs_inode);
}

#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)

extern struct kmem_cache *ocfs2_inode_cache;

extern const struct address_space_operations ocfs2_aops;
extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;

static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
{
	return &OCFS2_I(inode)->ip_metadata_cache;
}

void ocfs2_evict_inode(struct inode *inode);
int ocfs2_drop_inode(struct inode *inode);

/* Flags for ocfs2_iget() */
#define OCFS2_FI_FLAG_SYSFILE		0x1
#define OCFS2_FI_FLAG_ORPHAN_RECOVERY	0x2
struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
			 int sysfile_type);
int ocfs2_inode_init_private(struct inode *inode);
int ocfs2_inode_revalidate(struct dentry *dentry);
void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
			  int create_ino);
void ocfs2_read_inode(struct inode *inode);
void ocfs2_read_inode2(struct inode *inode, void *opaque);
ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
			size_t size, loff_t *offp);
void ocfs2_sync_blockdev(struct super_block *sb);
void ocfs2_refresh_inode(struct inode *inode,
			 struct ocfs2_dinode *fe);
int ocfs2_mark_inode_dirty(handle_t *handle,
			   struct inode *inode,
			   struct buffer_head *bh);
struct buffer_head *ocfs2_bread(struct inode *inode,
				int block, int *err, int reada);

void ocfs2_set_inode_flags(struct inode *inode);
void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);

static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
{
	int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;

	return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
}

/* Validate that a bh contains a valid inode */
int ocfs2_validate_inode_block(struct super_block *sb,
			       struct buffer_head *bh);
/*
 * Read an inode block into *bh.  If *bh is NULL, a bh will be allocated.
 * This is a cached read.  The inode will be validated with
 * ocfs2_validate_inode_block().
 */
int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
/* The same, but can be passed OCFS2_BH_* flags */
int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
				int flags);

static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
{
	return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
}

#endif /* OCFS2_INODE_H */
Commit	Line	Data
ccd979bd MF	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* inode.h
	5	*
	6	* Function prototypes
	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_INODE_H
	27	#define OCFS2_INODE_H
	28
83418978 MF	29	#include "extent_map.h"
83418978 MF	30
ccd979bd MF	31	/* OCFS2 Inode Private Data */
	32	struct ocfs2_inode_info
	33	{
	34	u64 ip_blkno;
	35
	36	struct ocfs2_lock_res ip_rw_lockres;
e63aecb6	37	struct ocfs2_lock_res ip_inode_lockres;
50008630	38	struct ocfs2_lock_res ip_open_lockres;
ccd979bd MF	39
	40	/* protects allocation changes on this inode. */
	41	struct rw_semaphore ip_alloc_sem;
	42
cf1d6c76 TY	43	/* protects extended attribute changes on this inode */
	44	struct rw_semaphore ip_xattr_sem;
	45
a11f7e63 MF	46	/* Number of outstanding AIO's which are not page aligned */
	47	atomic_t ip_unaligned_aio;
	48
ccd979bd MF	49	/* These fields are protected by ip_lock */
	50	spinlock_t ip_lock;
	51	u32 ip_open_count;
ccd979bd	52	struct list_head ip_io_markers;
83fd9c7f	53	u32 ip_clusters;
ccd979bd	54
83fd9c7f	55	u16 ip_dyn_features;
251b6ecc	56	struct mutex ip_io_mutex;
ccd979bd	57	u32 ip_flags; /* see below */
ca4d147e	58	u32 ip_attr; /* inode attributes */
ccd979bd MF	59
	60	/* protected by recovery_lock. */
	61	struct inode *ip_next_orphan;
	62
ccd979bd	63	struct ocfs2_caching_info ip_metadata_cache;
83418978	64	struct ocfs2_extent_map ip_extent_map;
ccd979bd	65	struct inode vfs_inode;
2b4e30fb	66	struct jbd2_inode ip_jinode;
13821151	67
83fd9c7f GR	68	u32 ip_dir_start_lookup;
83fd9c7f GR	69
13821151 TM	70	/* Only valid if the inode is the dir. */
	71	u32 ip_last_used_slot;
	72	u64 ip_last_used_group;
5e98d492	73	u32 ip_dir_lock_gen;
4fe370af MF	74
4fe370af MF	75	struct ocfs2_alloc_reservation ip_la_data_resv;
ccd979bd MF	76	};
	77
	78	/*
	79	* Flags for the ip_flags field
	80	*/
	81	/* System file inodes */
	82	#define OCFS2_INODE_SYSTEM_FILE 0x00000001
	83	#define OCFS2_INODE_JOURNAL 0x00000002
	84	#define OCFS2_INODE_BITMAP 0x00000004
	85	/* This inode has been wiped from disk */
	86	#define OCFS2_INODE_DELETED 0x00000008
	87	/* Another node is deleting, so our delete is a nop */
	88	#define OCFS2_INODE_SKIP_DELETE 0x00000010
	89	/* Has the inode been orphaned on another node?
	90	*
	91	* This hints to ocfs2_drop_inode that it should clear i_nlink before
	92	* continuing.
	93	*
	94	* We only set this on unlink vote from another node. If the inode
	95	* was locally orphaned, then we're sure of the state and don't need
	96	* to twiddle i_nlink later - it's either zero or not depending on
	97	* whether our unlink succeeded. Otherwise we got this from a node
	98	* whose intention was to orphan the inode, however he may have
	99	* crashed, failed etc, so we let ocfs2_drop_inode zero the value and
	100	* rely on ocfs2_delete_inode to sort things out under the proper
	101	* cluster locks.
	102	*/
	103	#define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
	104	/* Does someone have the file open O_DIRECT */
	105	#define OCFS2_INODE_OPEN_DIRECT 0x00000040
d4cd1871 LD	106	/* Tell the inode wipe code it's not in orphan dir */
d4cd1871 LD	107	#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000080
ccd979bd MF	108
	109	static inline struct ocfs2_inode_info OCFS2_I(struct inode inode)
	110	{
	111	return container_of(inode, struct ocfs2_inode_info, vfs_inode);
	112	}
	113
	114	#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
	115	#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags \|= OCFS2_INODE_JOURNAL)
	116
e18b890b	117	extern struct kmem_cache *ocfs2_inode_cache;
ccd979bd	118
f5e54d6e	119	extern const struct address_space_operations ocfs2_aops;
6e5a3d75	120	extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
ccd979bd	121
8cb471e8 JB	122	static inline struct ocfs2_caching_info INODE_CACHE(struct inode inode)
	123	{
	124	return &OCFS2_I(inode)->ip_metadata_cache;
	125	}
	126
066d92dc	127	void ocfs2_evict_inode(struct inode *inode);
45321ac5	128	int ocfs2_drop_inode(struct inode *inode);
24c19ef4 MF	129
24c19ef4 MF	130	/* Flags for ocfs2_iget() */
5fa0613e JK	131	#define OCFS2_FI_FLAG_SYSFILE 0x1
5fa0613e JK	132	#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
6ca497a8	133	struct inode ocfs2_ilookup(struct super_block sb, u64 feoff);
5fa0613e JK	134	struct inode ocfs2_iget(struct ocfs2_super osb, u64 feoff, unsigned flags,
5fa0613e JK	135	int sysfile_type);
ccd979bd MF	136	int ocfs2_inode_init_private(struct inode *inode);
ccd979bd MF	137	int ocfs2_inode_revalidate(struct dentry *dentry);
b657c95c JB	138	void ocfs2_populate_inode(struct inode inode, struct ocfs2_dinode fe,
b657c95c JB	139	int create_ino);
ccd979bd MF	140	void ocfs2_read_inode(struct inode *inode);
	141	void ocfs2_read_inode2(struct inode inode, void opaque);
	142	ssize_t ocfs2_rw_direct(int rw, struct file filp, char buf,
	143	size_t size, loff_t *offp);
	144	void ocfs2_sync_blockdev(struct super_block *sb);
	145	void ocfs2_refresh_inode(struct inode *inode,
	146	struct ocfs2_dinode *fe);
1fabe148	147	int ocfs2_mark_inode_dirty(handle_t *handle,
ccd979bd MF	148	struct inode *inode,
ccd979bd MF	149	struct buffer_head *bh);
9e33d69f JK	150	struct buffer_head ocfs2_bread(struct inode inode,
9e33d69f JK	151	int block, int *err, int reada);
ccd979bd	152
ca4d147e	153	void ocfs2_set_inode_flags(struct inode *inode);
6e4b0d56	154	void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
ca4d147e	155
8110b073 MF	156	static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
	157	{
	158	int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
	159
	160	return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
	161	}
	162
b657c95c JB	163	/* Validate that a bh contains a valid inode */
	164	int ocfs2_validate_inode_block(struct super_block *sb,
	165	struct buffer_head *bh);
	166	/*
	167	* Read an inode block into bh. If bh is NULL, a bh will be allocated.
	168	* This is a cached read. The inode will be validated with
	169	* ocfs2_validate_inode_block().
	170	*/
	171	int ocfs2_read_inode_block(struct inode inode, struct buffer_head *bh);
	172	/* The same, but can be passed OCFS2_BH_* flags */
	173	int ocfs2_read_inode_block_full(struct inode inode, struct buffer_head *bh,
	174	int flags);
6136ca5f JB	175
	176	static inline struct ocfs2_inode_info cache_info_to_inode(struct ocfs2_caching_info ci)
	177	{
	178	return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
	179	}
	180
ccd979bd	181	#endif /* OCFS2_INODE_H */