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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_FS_H
#define _BCACHEFS_FS_H
#include "inode.h"
#include "opts.h"
#include "str_hash.h"
#include "quota_types.h"
#include <linux/seqlock.h>
#include <linux/stat.h>
/*
* Two-state lock - can be taken for add or block - both states are shared,
* like read side of rwsem, but conflict with other state:
*/
struct pagecache_lock {
atomic_long_t v;
wait_queue_head_t wait;
};
static inline void pagecache_lock_init(struct pagecache_lock *lock)
{
atomic_long_set(&lock->v, 0);
init_waitqueue_head(&lock->wait);
}
void bch2_pagecache_add_put(struct pagecache_lock *);
void bch2_pagecache_add_get(struct pagecache_lock *);
void bch2_pagecache_block_put(struct pagecache_lock *);
void bch2_pagecache_block_get(struct pagecache_lock *);
struct bch_inode_info {
struct inode v;
struct mutex ei_update_lock;
u64 ei_journal_seq;
u64 ei_quota_reserved;
unsigned long ei_last_dirtied;
struct pagecache_lock ei_pagecache_lock;
struct mutex ei_quota_lock;
struct bch_qid ei_qid;
struct bch_hash_info ei_str_hash;
/* copy of inode in btree: */
struct bch_inode_unpacked ei_inode;
};
#define to_bch_ei(_inode) \
container_of_or_null(_inode, struct bch_inode_info, v)
static inline struct bch_inode_info *file_bch_inode(struct file *file)
{
return to_bch_ei(file_inode(file));
}
static inline u8 mode_to_type(umode_t mode)
{
return (mode >> 12) & 15;
}
static inline unsigned nlink_bias(umode_t mode)
{
return S_ISDIR(mode) ? 2 : 1;
}
struct bch_inode_unpacked;
#ifndef NO_BCACHEFS_FS
/* returns 0 if we want to do the update, or error is passed up */
typedef int (*inode_set_fn)(struct bch_inode_info *,
struct bch_inode_unpacked *, void *);
void bch2_inode_update_after_write(struct bch_fs *,
struct bch_inode_info *,
struct bch_inode_unpacked *,
unsigned);
int __must_check bch2_write_inode_trans(struct btree_trans *,
struct bch_inode_info *,
struct bch_inode_unpacked *,
inode_set_fn, void *);
int __must_check bch2_write_inode(struct bch_fs *, struct bch_inode_info *,
inode_set_fn, void *, unsigned);
void bch2_vfs_exit(void);
int bch2_vfs_init(void);
#else
static inline void bch2_vfs_exit(void) {}
static inline int bch2_vfs_init(void) { return 0; }
#endif /* NO_BCACHEFS_FS */
#endif /* _BCACHEFS_FS_H */
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