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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019 Samsung Electronics Co., Ltd.
*/
#ifndef __VFS_CACHE_H__
#define __VFS_CACHE_H__
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/rwsem.h>
#include <linux/spinlock.h>
#include <linux/idr.h>
#include <linux/workqueue.h>
#include "vfs.h"
/* Windows style file permissions for extended response */
#define FILE_GENERIC_ALL 0x1F01FF
#define FILE_GENERIC_READ 0x120089
#define FILE_GENERIC_WRITE 0x120116
#define FILE_GENERIC_EXECUTE 0X1200a0
#define KSMBD_START_FID 0
#define KSMBD_NO_FID (INT_MAX)
#define SMB2_NO_FID (0xFFFFFFFFFFFFFFFFULL)
struct ksmbd_conn;
struct ksmbd_session;
struct ksmbd_lock {
struct file_lock *fl;
struct list_head clist;
struct list_head flist;
struct list_head llist;
unsigned int flags;
int cmd;
int zero_len;
unsigned long long start;
unsigned long long end;
};
struct stream {
char *name;
ssize_t size;
};
struct ksmbd_inode {
rwlock_t m_lock;
atomic_t m_count;
atomic_t op_count;
/* opinfo count for streams */
atomic_t sop_count;
struct inode *m_inode;
unsigned int m_flags;
struct hlist_node m_hash;
struct list_head m_fp_list;
struct list_head m_op_list;
struct oplock_info *m_opinfo;
__le32 m_fattr;
};
struct ksmbd_file {
struct file *filp;
char *filename;
u64 persistent_id;
u64 volatile_id;
spinlock_t f_lock;
struct ksmbd_inode *f_ci;
struct ksmbd_inode *f_parent_ci;
struct oplock_info __rcu *f_opinfo;
struct ksmbd_conn *conn;
struct ksmbd_tree_connect *tcon;
atomic_t refcount;
__le32 daccess;
__le32 saccess;
__le32 coption;
__le32 cdoption;
__u64 create_time;
__u64 itime;
bool is_nt_open;
bool attrib_only;
char client_guid[16];
char create_guid[16];
char app_instance_id[16];
struct stream stream;
struct list_head node;
struct list_head blocked_works;
struct list_head lock_list;
int durable_timeout;
/* for SMB1 */
int pid;
/* conflict lock fail count for SMB1 */
unsigned int cflock_cnt;
/* last lock failure start offset for SMB1 */
unsigned long long llock_fstart;
int dirent_offset;
/* if ls is happening on directory, below is valid*/
struct ksmbd_readdir_data readdir_data;
int dot_dotdot[2];
};
static inline void set_ctx_actor(struct dir_context *ctx,
filldir_t actor)
{
ctx->actor = actor;
}
#define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG
struct ksmbd_file_table {
rwlock_t lock;
struct idr *idr;
};
static inline bool has_file_id(u64 id)
{
return id < KSMBD_NO_FID;
}
static inline bool ksmbd_stream_fd(struct ksmbd_file *fp)
{
return fp->stream.name != NULL;
}
int ksmbd_init_file_table(struct ksmbd_file_table *ft);
void ksmbd_destroy_file_table(struct ksmbd_file_table *ft);
int ksmbd_close_fd(struct ksmbd_work *work, u64 id);
struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, u64 id);
struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, u64 id);
struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id,
u64 pid);
void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp);
struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id);
struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid);
struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode);
unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp);
struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp);
void ksmbd_close_tree_conn_fds(struct ksmbd_work *work);
void ksmbd_close_session_fds(struct ksmbd_work *work);
int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode);
int ksmbd_init_global_file_table(void);
void ksmbd_free_global_file_table(void);
int ksmbd_file_table_flush(struct ksmbd_work *work);
void ksmbd_set_fd_limit(unsigned long limit);
/*
* INODE hash
*/
int __init ksmbd_inode_hash_init(void);
void ksmbd_release_inode_hash(void);
enum KSMBD_INODE_STATUS {
KSMBD_INODE_STATUS_OK,
KSMBD_INODE_STATUS_UNKNOWN,
KSMBD_INODE_STATUS_PENDING_DELETE,
};
int ksmbd_query_inode_status(struct inode *inode);
bool ksmbd_inode_pending_delete(struct ksmbd_file *fp);
void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp);
void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp);
void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp,
int file_info);
int ksmbd_init_file_cache(void);
void ksmbd_exit_file_cache(void);
#endif /* __VFS_CACHE_H__ */
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