[linux-2.6-block.git] / fs / ocfs2 / inode.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * inode.h
 *
 * Function prototypes
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 */

#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;

	/* 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 */

	/* Record unwritten extents during direct io. */
	struct list_head		ip_unwritten_list;

	/* 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;

	/*
	 * Transactions that contain inode's metadata needed to complete
	 * fsync and fdatasync, respectively.
	 */
	tid_t i_sync_tid;
	tid_t i_datasync_tid;

	struct dquot __rcu *i_dquot[MAXQUOTAS];
};

/*
 * 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
/* 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	0x00000010
/* Does someone have the file open O_DIRECT */
#define OCFS2_INODE_OPEN_DIRECT		0x00000020
/* Tell the inode wipe code it's not in orphan dir */
#define OCFS2_INODE_SKIP_ORPHAN_DIR     0x00000040
/* Entry in orphan dir with 'dio-' prefix */
#define OCFS2_INODE_DIO_ORPHAN_ENTRY	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 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
#define OCFS2_FI_FLAG_FILECHECK_CHK	0x4
#define OCFS2_FI_FLAG_FILECHECK_FIX	0x8

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_revalidate(struct dentry *dentry);
void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
			  int create_ino);
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);

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);
}

/* Does this inode have the reflink flag set? */
static inline bool ocfs2_is_refcount_inode(struct inode *inode)
{
	return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
}

#endif /* OCFS2_INODE_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
	2	/*
	3	* inode.h
	4	*
	5	* Function prototypes
	6	*
	7	* Copyright (C) 2002, 2004 Oracle. All rights reserved.
	8	*/
	9
	10	#ifndef OCFS2_INODE_H
	11	#define OCFS2_INODE_H
	12
	13	#include "extent_map.h"
	14
	15	/* OCFS2 Inode Private Data */
	16	struct ocfs2_inode_info
	17	{
	18	u64 ip_blkno;
	19
	20	struct ocfs2_lock_res ip_rw_lockres;
	21	struct ocfs2_lock_res ip_inode_lockres;
	22	struct ocfs2_lock_res ip_open_lockres;
	23
	24	/* protects allocation changes on this inode. */
	25	struct rw_semaphore ip_alloc_sem;
	26
	27	/* protects extended attribute changes on this inode */
	28	struct rw_semaphore ip_xattr_sem;
	29
	30	/* These fields are protected by ip_lock */
	31	spinlock_t ip_lock;
	32	u32 ip_open_count;
	33	struct list_head ip_io_markers;
	34	u32 ip_clusters;
	35
	36	u16 ip_dyn_features;
	37	struct mutex ip_io_mutex;
	38	u32 ip_flags; /* see below */
	39	u32 ip_attr; /* inode attributes */
	40
	41	/* Record unwritten extents during direct io. */
	42	struct list_head ip_unwritten_list;
	43
	44	/* protected by recovery_lock. */
	45	struct inode *ip_next_orphan;
	46
	47	struct ocfs2_caching_info ip_metadata_cache;
	48	struct ocfs2_extent_map ip_extent_map;
	49	struct inode vfs_inode;
	50	struct jbd2_inode ip_jinode;
	51
	52	u32 ip_dir_start_lookup;
	53
	54	/* Only valid if the inode is the dir. */
	55	u32 ip_last_used_slot;
	56	u64 ip_last_used_group;
	57	u32 ip_dir_lock_gen;
	58
	59	struct ocfs2_alloc_reservation ip_la_data_resv;
	60
	61	/*
	62	* Transactions that contain inode's metadata needed to complete
	63	* fsync and fdatasync, respectively.
	64	*/
	65	tid_t i_sync_tid;
	66	tid_t i_datasync_tid;
	67
	68	struct dquot __rcu *i_dquot[MAXQUOTAS];
	69	};
	70
	71	/*
	72	* Flags for the ip_flags field
	73	*/
	74	/* System file inodes */
	75	#define OCFS2_INODE_SYSTEM_FILE 0x00000001
	76	#define OCFS2_INODE_JOURNAL 0x00000002
	77	#define OCFS2_INODE_BITMAP 0x00000004
	78	/* This inode has been wiped from disk */
	79	#define OCFS2_INODE_DELETED 0x00000008
	80	/* Has the inode been orphaned on another node?
	81	*
	82	* This hints to ocfs2_drop_inode that it should clear i_nlink before
	83	* continuing.
	84	*
	85	* We only set this on unlink vote from another node. If the inode
	86	* was locally orphaned, then we're sure of the state and don't need
	87	* to twiddle i_nlink later - it's either zero or not depending on
	88	* whether our unlink succeeded. Otherwise we got this from a node
	89	* whose intention was to orphan the inode, however he may have
	90	* crashed, failed etc, so we let ocfs2_drop_inode zero the value and
	91	* rely on ocfs2_delete_inode to sort things out under the proper
	92	* cluster locks.
	93	*/
	94	#define OCFS2_INODE_MAYBE_ORPHANED 0x00000010
	95	/* Does someone have the file open O_DIRECT */
	96	#define OCFS2_INODE_OPEN_DIRECT 0x00000020
	97	/* Tell the inode wipe code it's not in orphan dir */
	98	#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040
	99	/* Entry in orphan dir with 'dio-' prefix */
	100	#define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080
	101
	102	static inline struct ocfs2_inode_info OCFS2_I(struct inode inode)
	103	{
	104	return container_of(inode, struct ocfs2_inode_info, vfs_inode);
	105	}
	106
	107	#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
	108	#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags \|= OCFS2_INODE_JOURNAL)
	109
	110	extern const struct address_space_operations ocfs2_aops;
	111	extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
	112
	113	static inline struct ocfs2_caching_info INODE_CACHE(struct inode inode)
	114	{
	115	return &OCFS2_I(inode)->ip_metadata_cache;
	116	}
	117
	118	void ocfs2_evict_inode(struct inode *inode);
	119	int ocfs2_drop_inode(struct inode *inode);
	120
	121	/* Flags for ocfs2_iget() */
	122	#define OCFS2_FI_FLAG_SYSFILE 0x1
	123	#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
	124	#define OCFS2_FI_FLAG_FILECHECK_CHK 0x4
	125	#define OCFS2_FI_FLAG_FILECHECK_FIX 0x8
	126
	127	struct inode ocfs2_ilookup(struct super_block sb, u64 feoff);
	128	struct inode ocfs2_iget(struct ocfs2_super osb, u64 feoff, unsigned flags,
	129	int sysfile_type);
	130	int ocfs2_inode_revalidate(struct dentry *dentry);
	131	void ocfs2_populate_inode(struct inode inode, struct ocfs2_dinode fe,
	132	int create_ino);
	133	void ocfs2_sync_blockdev(struct super_block *sb);
	134	void ocfs2_refresh_inode(struct inode *inode,
	135	struct ocfs2_dinode *fe);
	136	int ocfs2_mark_inode_dirty(handle_t *handle,
	137	struct inode *inode,
	138	struct buffer_head *bh);
	139
	140	void ocfs2_set_inode_flags(struct inode *inode);
	141	void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
	142
	143	static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
	144	{
	145	int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
	146
	147	return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
	148	}
	149
	150	/* Validate that a bh contains a valid inode */
	151	int ocfs2_validate_inode_block(struct super_block *sb,
	152	struct buffer_head *bh);
	153	/*
	154	* Read an inode block into bh. If bh is NULL, a bh will be allocated.
	155	* This is a cached read. The inode will be validated with
	156	* ocfs2_validate_inode_block().
	157	*/
	158	int ocfs2_read_inode_block(struct inode inode, struct buffer_head *bh);
	159	/* The same, but can be passed OCFS2_BH_* flags */
	160	int ocfs2_read_inode_block_full(struct inode inode, struct buffer_head *bh,
	161	int flags);
	162
	163	static inline struct ocfs2_inode_info cache_info_to_inode(struct ocfs2_caching_info ci)
	164	{
	165	return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
	166	}
	167
	168	/* Does this inode have the reflink flag set? */
	169	static inline bool ocfs2_is_refcount_inode(struct inode *inode)
	170	{
	171	return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
	172	}
	173
	174	#endif /* OCFS2_INODE_H */