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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
*/
#ifndef __SMB_COMMON_H__
#define __SMB_COMMON_H__
#include <linux/kernel.h>
#include "glob.h"
#include "nterr.h"
#include "../common/smbglob.h"
#include "../common/smb2pdu.h"
#include "../common/fscc.h"
#include "smb2pdu.h"
/* ksmbd's Specific ERRNO */
#define ESHARE 50000
#define SMB1_PROT 0
#define SMB2_PROT 1
#define SMB21_PROT 2
/* multi-protocol negotiate request */
#define SMB2X_PROT 3
#define SMB30_PROT 4
#define SMB302_PROT 5
#define SMB311_PROT 6
#define BAD_PROT 0xFFFF
#define SMB_ECHO_INTERVAL (60 * HZ)
#define MAX_STREAM_PROT_LEN 0x00FFFFFF
/* Responses when opening a file. */
#define F_SUPERSEDED 0
#define F_OPENED 1
#define F_CREATED 2
#define F_OVERWRITTEN 3
/*
* File Attribute flags
*/
#define ATTR_POSIX_SEMANTICS 0x01000000
#define ATTR_BACKUP_SEMANTICS 0x02000000
#define ATTR_DELETE_ON_CLOSE 0x04000000
#define ATTR_SEQUENTIAL_SCAN 0x08000000
#define ATTR_RANDOM_ACCESS 0x10000000
#define ATTR_NO_BUFFERING 0x20000000
#define ATTR_WRITE_THROUGH 0x80000000
/* Combinations of file access permission bits */
#define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA \
| FILE_READ_ATTRIBUTES \
| DELETE | READ_CONTROL | WRITE_DAC \
| WRITE_OWNER | SYNCHRONIZE)
#define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
| FILE_WRITE_EA \
| FILE_DELETE_CHILD \
| FILE_WRITE_ATTRIBUTES \
| DELETE | READ_CONTROL | WRITE_DAC \
| WRITE_OWNER | SYNCHRONIZE)
/* generic flags for file open */
#define GENERIC_READ_FLAGS (READ_CONTROL | FILE_READ_DATA | \
FILE_READ_ATTRIBUTES | \
FILE_READ_EA | SYNCHRONIZE)
#define GENERIC_WRITE_FLAGS (READ_CONTROL | FILE_WRITE_DATA | \
FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA | \
FILE_APPEND_DATA | SYNCHRONIZE)
#define GENERIC_EXECUTE_FLAGS (READ_CONTROL | FILE_EXECUTE | \
FILE_READ_ATTRIBUTES | SYNCHRONIZE)
#define GENERIC_ALL_FLAGS (DELETE | READ_CONTROL | WRITE_DAC | \
WRITE_OWNER | SYNCHRONIZE | FILE_READ_DATA | \
FILE_WRITE_DATA | FILE_APPEND_DATA | \
FILE_READ_EA | FILE_WRITE_EA | \
FILE_EXECUTE | FILE_DELETE_CHILD | \
FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES)
#define SMB_COM_NEGOTIATE 0x72
#define SMB1_CLIENT_GUID_SIZE (16)
#define SMBFLG_RESPONSE 0x80 /* this PDU is a response from server */
#define SMBFLG2_IS_LONG_NAME cpu_to_le16(0x40)
#define SMBFLG2_EXT_SEC cpu_to_le16(0x800)
#define SMBFLG2_ERR_STATUS cpu_to_le16(0x4000)
#define SMBFLG2_UNICODE cpu_to_le16(0x8000)
/* See MS-CIFS 2.2.4.52.2 */
struct smb_negotiate_rsp {
struct smb_hdr hdr; /* wct = 17 */
__le16 DialectIndex; /* 0xFFFF = no dialect acceptable */
__le16 ByteCount;
} __packed;
struct filesystem_attribute_info {
__le32 Attributes;
__le32 MaxPathNameComponentLength;
__le32 FileSystemNameLen;
__le16 FileSystemName[]; /* do not have to save this - get subset? */
} __packed;
struct filesystem_vol_info {
__le64 VolumeCreationTime;
__le32 SerialNumber;
__le32 VolumeLabelSize;
__le16 Reserved;
__le16 VolumeLabel[];
} __packed;
struct filesystem_info {
__le64 TotalAllocationUnits;
__le64 FreeAllocationUnits;
__le32 SectorsPerAllocationUnit;
__le32 BytesPerSector;
} __packed; /* size info, level 0x103 */
#define EXTENDED_INFO_MAGIC 0x43667364 /* Cfsd */
#define STRING_LENGTH 28
struct fs_extended_info {
__le32 magic;
__le32 version;
__le32 release;
__u64 rel_date;
char version_string[STRING_LENGTH];
} __packed;
struct object_id_info {
char objid[16];
struct fs_extended_info extended_info;
} __packed;
struct file_names_info {
__le32 NextEntryOffset;
__u32 FileIndex;
__le32 FileNameLength;
char FileName[];
} __packed; /* level 0xc FF resp data */
struct file_id_both_directory_info {
__le32 NextEntryOffset;
__u32 FileIndex;
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
__le64 ChangeTime;
__le64 EndOfFile;
__le64 AllocationSize;
__le32 ExtFileAttributes;
__le32 FileNameLength;
__le32 EaSize; /* length of the xattrs */
__u8 ShortNameLength;
__u8 Reserved;
__u8 ShortName[24];
__le16 Reserved2;
__le64 UniqueId;
char FileName[];
} __packed;
struct smb_version_ops {
u16 (*get_cmd_val)(struct ksmbd_work *swork);
int (*init_rsp_hdr)(struct ksmbd_work *swork);
void (*set_rsp_status)(struct ksmbd_work *swork, __le32 err);
int (*allocate_rsp_buf)(struct ksmbd_work *work);
int (*set_rsp_credits)(struct ksmbd_work *work);
int (*check_user_session)(struct ksmbd_work *work);
int (*get_ksmbd_tcon)(struct ksmbd_work *work);
bool (*is_sign_req)(struct ksmbd_work *work, unsigned int command);
int (*check_sign_req)(struct ksmbd_work *work);
void (*set_sign_rsp)(struct ksmbd_work *work);
int (*generate_signingkey)(struct ksmbd_session *sess, struct ksmbd_conn *conn);
void (*generate_encryptionkey)(struct ksmbd_conn *conn, struct ksmbd_session *sess);
bool (*is_transform_hdr)(void *buf);
int (*decrypt_req)(struct ksmbd_work *work);
int (*encrypt_resp)(struct ksmbd_work *work);
};
struct smb_version_cmds {
int (*proc)(struct ksmbd_work *swork);
};
int ksmbd_min_protocol(void);
int ksmbd_max_protocol(void);
int ksmbd_lookup_protocol_idx(char *str);
int ksmbd_verify_smb_message(struct ksmbd_work *work);
bool ksmbd_smb_request(struct ksmbd_conn *conn);
int ksmbd_lookup_dialect_by_id(__le16 *cli_dialects, __le16 dialects_count);
int ksmbd_init_smb_server(struct ksmbd_conn *conn);
struct ksmbd_kstat;
int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work,
int info_level,
struct ksmbd_file *dir,
struct ksmbd_dir_info *d_info,
char *search_pattern,
int (*fn)(struct ksmbd_conn *,
int,
struct ksmbd_dir_info *,
struct ksmbd_kstat *));
int ksmbd_extract_shortname(struct ksmbd_conn *conn,
const char *longname,
char *shortname);
int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command);
int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp);
int __ksmbd_override_fsids(struct ksmbd_work *work,
struct ksmbd_share_config *share);
int ksmbd_override_fsids(struct ksmbd_work *work);
void ksmbd_revert_fsids(struct ksmbd_work *work);
unsigned int ksmbd_server_side_copy_max_chunk_count(void);
unsigned int ksmbd_server_side_copy_max_chunk_size(void);
unsigned int ksmbd_server_side_copy_max_total_size(void);
bool is_asterisk(char *p);
__le32 smb_map_generic_desired_access(__le32 daccess);
#endif /* __SMB_COMMON_H__ */
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