cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

smb_common.h (14663B)


      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
      4 */
      5
      6#ifndef __SMB_COMMON_H__
      7#define __SMB_COMMON_H__
      8
      9#include <linux/kernel.h>
     10
     11#include "glob.h"
     12#include "nterr.h"
     13#include "../smbfs_common/smb2pdu.h"
     14#include "smb2pdu.h"
     15
     16/* ksmbd's Specific ERRNO */
     17#define ESHARE			50000
     18
     19#define SMB1_PROT		0
     20#define SMB2_PROT		1
     21#define SMB21_PROT		2
     22/* multi-protocol negotiate request */
     23#define SMB2X_PROT		3
     24#define SMB30_PROT		4
     25#define SMB302_PROT		5
     26#define SMB311_PROT		6
     27#define BAD_PROT		0xFFFF
     28
     29#define SMB1_VERSION_STRING	"1.0"
     30#define SMB20_VERSION_STRING	"2.0"
     31#define SMB21_VERSION_STRING	"2.1"
     32#define SMB30_VERSION_STRING	"3.0"
     33#define SMB302_VERSION_STRING	"3.02"
     34#define SMB311_VERSION_STRING	"3.1.1"
     35
     36#define SMB_ECHO_INTERVAL	(60 * HZ)
     37
     38#define CIFS_DEFAULT_IOSIZE	(64 * 1024)
     39#define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */
     40
     41#define MAX_STREAM_PROT_LEN	0x00FFFFFF
     42
     43/* Responses when opening a file. */
     44#define F_SUPERSEDED	0
     45#define F_OPENED	1
     46#define F_CREATED	2
     47#define F_OVERWRITTEN	3
     48
     49/*
     50 * File Attribute flags
     51 */
     52#define ATTR_POSIX_SEMANTICS		0x01000000
     53#define ATTR_BACKUP_SEMANTICS		0x02000000
     54#define ATTR_DELETE_ON_CLOSE		0x04000000
     55#define ATTR_SEQUENTIAL_SCAN		0x08000000
     56#define ATTR_RANDOM_ACCESS		0x10000000
     57#define ATTR_NO_BUFFERING		0x20000000
     58#define ATTR_WRITE_THROUGH		0x80000000
     59
     60/* List of FileSystemAttributes - see 2.5.1 of MS-FSCC */
     61#define FILE_SUPPORTS_SPARSE_VDL	0x10000000 /* faster nonsparse extend */
     62#define FILE_SUPPORTS_BLOCK_REFCOUNTING	0x08000000 /* allow ioctl dup extents */
     63#define FILE_SUPPORT_INTEGRITY_STREAMS	0x04000000
     64#define FILE_SUPPORTS_USN_JOURNAL	0x02000000
     65#define FILE_SUPPORTS_OPEN_BY_FILE_ID	0x01000000
     66#define FILE_SUPPORTS_EXTENDED_ATTRIBUTES 0x00800000
     67#define FILE_SUPPORTS_HARD_LINKS	0x00400000
     68#define FILE_SUPPORTS_TRANSACTIONS	0x00200000
     69#define FILE_SEQUENTIAL_WRITE_ONCE	0x00100000
     70#define FILE_READ_ONLY_VOLUME		0x00080000
     71#define FILE_NAMED_STREAMS		0x00040000
     72#define FILE_SUPPORTS_ENCRYPTION	0x00020000
     73#define FILE_SUPPORTS_OBJECT_IDS	0x00010000
     74#define FILE_VOLUME_IS_COMPRESSED	0x00008000
     75#define FILE_SUPPORTS_REMOTE_STORAGE	0x00000100
     76#define FILE_SUPPORTS_REPARSE_POINTS	0x00000080
     77#define FILE_SUPPORTS_SPARSE_FILES	0x00000040
     78#define FILE_VOLUME_QUOTAS		0x00000020
     79#define FILE_FILE_COMPRESSION		0x00000010
     80#define FILE_PERSISTENT_ACLS		0x00000008
     81#define FILE_UNICODE_ON_DISK		0x00000004
     82#define FILE_CASE_PRESERVED_NAMES	0x00000002
     83#define FILE_CASE_SENSITIVE_SEARCH	0x00000001
     84
     85#define FILE_READ_DATA        0x00000001  /* Data can be read from the file   */
     86#define FILE_WRITE_DATA       0x00000002  /* Data can be written to the file  */
     87#define FILE_APPEND_DATA      0x00000004  /* Data can be appended to the file */
     88#define FILE_READ_EA          0x00000008  /* Extended attributes associated   */
     89/* with the file can be read        */
     90#define FILE_WRITE_EA         0x00000010  /* Extended attributes associated   */
     91/* with the file can be written     */
     92#define FILE_EXECUTE          0x00000020  /*Data can be read into memory from */
     93/* the file using system paging I/O */
     94#define FILE_DELETE_CHILD     0x00000040
     95#define FILE_READ_ATTRIBUTES  0x00000080  /* Attributes associated with the   */
     96/* file can be read                 */
     97#define FILE_WRITE_ATTRIBUTES 0x00000100  /* Attributes associated with the   */
     98/* file can be written              */
     99#define DELETE                0x00010000  /* The file can be deleted          */
    100#define READ_CONTROL          0x00020000  /* The access control list and      */
    101/* ownership associated with the    */
    102/* file can be read                 */
    103#define WRITE_DAC             0x00040000  /* The access control list and      */
    104/* ownership associated with the    */
    105/* file can be written.             */
    106#define WRITE_OWNER           0x00080000  /* Ownership information associated */
    107/* with the file can be written     */
    108#define SYNCHRONIZE           0x00100000  /* The file handle can waited on to */
    109/* synchronize with the completion  */
    110/* of an input/output request       */
    111#define GENERIC_ALL           0x10000000
    112#define GENERIC_EXECUTE       0x20000000
    113#define GENERIC_WRITE         0x40000000
    114#define GENERIC_READ          0x80000000
    115/* In summary - Relevant file       */
    116/* access flags from CIFS are       */
    117/* file_read_data, file_write_data  */
    118/* file_execute, file_read_attributes*/
    119/* write_dac, and delete.           */
    120
    121#define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA \
    122		| FILE_READ_ATTRIBUTES \
    123		| DELETE | READ_CONTROL | WRITE_DAC \
    124		| WRITE_OWNER | SYNCHRONIZE)
    125#define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
    126		| FILE_WRITE_EA \
    127		| FILE_DELETE_CHILD \
    128		| FILE_WRITE_ATTRIBUTES \
    129		| DELETE | READ_CONTROL | WRITE_DAC \
    130		| WRITE_OWNER | SYNCHRONIZE)
    131#define SET_FILE_EXEC_RIGHTS (FILE_READ_EA | FILE_WRITE_EA | FILE_EXECUTE \
    132		| FILE_READ_ATTRIBUTES \
    133		| FILE_WRITE_ATTRIBUTES \
    134		| DELETE | READ_CONTROL | WRITE_DAC \
    135		| WRITE_OWNER | SYNCHRONIZE)
    136
    137#define SET_MINIMUM_RIGHTS (FILE_READ_EA | FILE_READ_ATTRIBUTES \
    138		| READ_CONTROL | SYNCHRONIZE)
    139
    140/* generic flags for file open */
    141#define GENERIC_READ_FLAGS	(READ_CONTROL | FILE_READ_DATA | \
    142		FILE_READ_ATTRIBUTES | \
    143		FILE_READ_EA | SYNCHRONIZE)
    144
    145#define GENERIC_WRITE_FLAGS	(READ_CONTROL | FILE_WRITE_DATA | \
    146		FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA | \
    147		FILE_APPEND_DATA | SYNCHRONIZE)
    148
    149#define GENERIC_EXECUTE_FLAGS	(READ_CONTROL | FILE_EXECUTE | \
    150		FILE_READ_ATTRIBUTES | SYNCHRONIZE)
    151
    152#define GENERIC_ALL_FLAGS	(DELETE | READ_CONTROL | WRITE_DAC | \
    153		WRITE_OWNER | SYNCHRONIZE | FILE_READ_DATA | \
    154		FILE_WRITE_DATA | FILE_APPEND_DATA | \
    155		FILE_READ_EA | FILE_WRITE_EA | \
    156		FILE_EXECUTE | FILE_DELETE_CHILD | \
    157		FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES)
    158
    159#define SMB1_PROTO_NUMBER		cpu_to_le32(0x424d53ff)
    160#define SMB_COM_NEGOTIATE		0x72
    161
    162#define SMB1_CLIENT_GUID_SIZE		(16)
    163struct smb_hdr {
    164	__be32 smb_buf_length;
    165	__u8 Protocol[4];
    166	__u8 Command;
    167	union {
    168		struct {
    169			__u8 ErrorClass;
    170			__u8 Reserved;
    171			__le16 Error;
    172		} __packed DosError;
    173		__le32 CifsError;
    174	} __packed Status;
    175	__u8 Flags;
    176	__le16 Flags2;          /* note: le */
    177	__le16 PidHigh;
    178	union {
    179		struct {
    180			__le32 SequenceNumber;  /* le */
    181			__u32 Reserved; /* zero */
    182		} __packed Sequence;
    183		__u8 SecuritySignature[8];      /* le */
    184	} __packed Signature;
    185	__u8 pad[2];
    186	__le16 Tid;
    187	__le16 Pid;
    188	__le16 Uid;
    189	__le16 Mid;
    190	__u8 WordCount;
    191} __packed;
    192
    193struct smb_negotiate_req {
    194	struct smb_hdr hdr;     /* wct = 0 */
    195	__le16 ByteCount;
    196	unsigned char DialectsArray[1];
    197} __packed;
    198
    199struct smb_negotiate_rsp {
    200	struct smb_hdr hdr;     /* wct = 17 */
    201	__le16 DialectIndex; /* 0xFFFF = no dialect acceptable */
    202	__u8 SecurityMode;
    203	__le16 MaxMpxCount;
    204	__le16 MaxNumberVcs;
    205	__le32 MaxBufferSize;
    206	__le32 MaxRawSize;
    207	__le32 SessionKey;
    208	__le32 Capabilities;    /* see below */
    209	__le32 SystemTimeLow;
    210	__le32 SystemTimeHigh;
    211	__le16 ServerTimeZone;
    212	__u8 EncryptionKeyLength;
    213	__le16 ByteCount;
    214	union {
    215		unsigned char EncryptionKey[8]; /* cap extended security off */
    216		/* followed by Domain name - if extended security is off */
    217		/* followed by 16 bytes of server GUID */
    218		/* then security blob if cap_extended_security negotiated */
    219		struct {
    220			unsigned char GUID[SMB1_CLIENT_GUID_SIZE];
    221			unsigned char SecurityBlob[1];
    222		} __packed extended_response;
    223	} __packed u;
    224} __packed;
    225
    226struct filesystem_attribute_info {
    227	__le32 Attributes;
    228	__le32 MaxPathNameComponentLength;
    229	__le32 FileSystemNameLen;
    230	__le16 FileSystemName[1]; /* do not have to save this - get subset? */
    231} __packed;
    232
    233struct filesystem_device_info {
    234	__le32 DeviceType;
    235	__le32 DeviceCharacteristics;
    236} __packed; /* device info level 0x104 */
    237
    238struct filesystem_vol_info {
    239	__le64 VolumeCreationTime;
    240	__le32 SerialNumber;
    241	__le32 VolumeLabelSize;
    242	__le16 Reserved;
    243	__le16 VolumeLabel[1];
    244} __packed;
    245
    246struct filesystem_info {
    247	__le64 TotalAllocationUnits;
    248	__le64 FreeAllocationUnits;
    249	__le32 SectorsPerAllocationUnit;
    250	__le32 BytesPerSector;
    251} __packed;     /* size info, level 0x103 */
    252
    253#define EXTENDED_INFO_MAGIC 0x43667364	/* Cfsd */
    254#define STRING_LENGTH 28
    255
    256struct fs_extended_info {
    257	__le32 magic;
    258	__le32 version;
    259	__le32 release;
    260	__u64 rel_date;
    261	char    version_string[STRING_LENGTH];
    262} __packed;
    263
    264struct object_id_info {
    265	char objid[16];
    266	struct fs_extended_info extended_info;
    267} __packed;
    268
    269struct file_directory_info {
    270	__le32 NextEntryOffset;
    271	__u32 FileIndex;
    272	__le64 CreationTime;
    273	__le64 LastAccessTime;
    274	__le64 LastWriteTime;
    275	__le64 ChangeTime;
    276	__le64 EndOfFile;
    277	__le64 AllocationSize;
    278	__le32 ExtFileAttributes;
    279	__le32 FileNameLength;
    280	char FileName[1];
    281} __packed;   /* level 0x101 FF resp data */
    282
    283struct file_names_info {
    284	__le32 NextEntryOffset;
    285	__u32 FileIndex;
    286	__le32 FileNameLength;
    287	char FileName[1];
    288} __packed;   /* level 0xc FF resp data */
    289
    290struct file_full_directory_info {
    291	__le32 NextEntryOffset;
    292	__u32 FileIndex;
    293	__le64 CreationTime;
    294	__le64 LastAccessTime;
    295	__le64 LastWriteTime;
    296	__le64 ChangeTime;
    297	__le64 EndOfFile;
    298	__le64 AllocationSize;
    299	__le32 ExtFileAttributes;
    300	__le32 FileNameLength;
    301	__le32 EaSize;
    302	char FileName[1];
    303} __packed; /* level 0x102 FF resp */
    304
    305struct file_both_directory_info {
    306	__le32 NextEntryOffset;
    307	__u32 FileIndex;
    308	__le64 CreationTime;
    309	__le64 LastAccessTime;
    310	__le64 LastWriteTime;
    311	__le64 ChangeTime;
    312	__le64 EndOfFile;
    313	__le64 AllocationSize;
    314	__le32 ExtFileAttributes;
    315	__le32 FileNameLength;
    316	__le32 EaSize; /* length of the xattrs */
    317	__u8   ShortNameLength;
    318	__u8   Reserved;
    319	__u8   ShortName[24];
    320	char FileName[1];
    321} __packed; /* level 0x104 FFrsp data */
    322
    323struct file_id_both_directory_info {
    324	__le32 NextEntryOffset;
    325	__u32 FileIndex;
    326	__le64 CreationTime;
    327	__le64 LastAccessTime;
    328	__le64 LastWriteTime;
    329	__le64 ChangeTime;
    330	__le64 EndOfFile;
    331	__le64 AllocationSize;
    332	__le32 ExtFileAttributes;
    333	__le32 FileNameLength;
    334	__le32 EaSize; /* length of the xattrs */
    335	__u8   ShortNameLength;
    336	__u8   Reserved;
    337	__u8   ShortName[24];
    338	__le16 Reserved2;
    339	__le64 UniqueId;
    340	char FileName[1];
    341} __packed;
    342
    343struct file_id_full_dir_info {
    344	__le32 NextEntryOffset;
    345	__u32 FileIndex;
    346	__le64 CreationTime;
    347	__le64 LastAccessTime;
    348	__le64 LastWriteTime;
    349	__le64 ChangeTime;
    350	__le64 EndOfFile;
    351	__le64 AllocationSize;
    352	__le32 ExtFileAttributes;
    353	__le32 FileNameLength;
    354	__le32 EaSize; /* EA size */
    355	__le32 Reserved;
    356	__le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
    357	char FileName[1];
    358} __packed; /* level 0x105 FF rsp data */
    359
    360struct smb_version_values {
    361	char		*version_string;
    362	__u16		protocol_id;
    363	__le16		lock_cmd;
    364	__u32		capabilities;
    365	__u32		max_read_size;
    366	__u32		max_write_size;
    367	__u32		max_trans_size;
    368	__u32		max_credits;
    369	__u32		large_lock_type;
    370	__u32		exclusive_lock_type;
    371	__u32		shared_lock_type;
    372	__u32		unlock_lock_type;
    373	size_t		header_size;
    374	size_t		max_header_size;
    375	size_t		read_rsp_size;
    376	unsigned int	cap_unix;
    377	unsigned int	cap_nt_find;
    378	unsigned int	cap_large_files;
    379	__u16		signing_enabled;
    380	__u16		signing_required;
    381	size_t		create_lease_size;
    382	size_t		create_durable_size;
    383	size_t		create_durable_v2_size;
    384	size_t		create_mxac_size;
    385	size_t		create_disk_id_size;
    386	size_t		create_posix_size;
    387};
    388
    389struct filesystem_posix_info {
    390	/* For undefined recommended transfer size return -1 in that field */
    391	__le32 OptimalTransferSize;  /* bsize on some os, iosize on other os */
    392	__le32 BlockSize;
    393	/* The next three fields are in terms of the block size.
    394	 * (above). If block size is unknown, 4096 would be a
    395	 * reasonable block size for a server to report.
    396	 * Note that returning the blocks/blocksavail removes need
    397	 * to make a second call (to QFSInfo level 0x103 to get this info.
    398	 * UserBlockAvail is typically less than or equal to BlocksAvail,
    399	 * if no distinction is made return the same value in each
    400	 */
    401	__le64 TotalBlocks;
    402	__le64 BlocksAvail;       /* bfree */
    403	__le64 UserBlocksAvail;   /* bavail */
    404	/* For undefined Node fields or FSID return -1 */
    405	__le64 TotalFileNodes;
    406	__le64 FreeFileNodes;
    407	__le64 FileSysIdentifier;   /* fsid */
    408	/* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
    409	/* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
    410} __packed;
    411
    412struct smb_version_ops {
    413	u16 (*get_cmd_val)(struct ksmbd_work *swork);
    414	int (*init_rsp_hdr)(struct ksmbd_work *swork);
    415	void (*set_rsp_status)(struct ksmbd_work *swork, __le32 err);
    416	int (*allocate_rsp_buf)(struct ksmbd_work *work);
    417	int (*set_rsp_credits)(struct ksmbd_work *work);
    418	int (*check_user_session)(struct ksmbd_work *work);
    419	int (*get_ksmbd_tcon)(struct ksmbd_work *work);
    420	bool (*is_sign_req)(struct ksmbd_work *work, unsigned int command);
    421	int (*check_sign_req)(struct ksmbd_work *work);
    422	void (*set_sign_rsp)(struct ksmbd_work *work);
    423	int (*generate_signingkey)(struct ksmbd_session *sess, struct ksmbd_conn *conn);
    424	int (*generate_encryptionkey)(struct ksmbd_session *sess);
    425	bool (*is_transform_hdr)(void *buf);
    426	int (*decrypt_req)(struct ksmbd_work *work);
    427	int (*encrypt_resp)(struct ksmbd_work *work);
    428};
    429
    430struct smb_version_cmds {
    431	int (*proc)(struct ksmbd_work *swork);
    432};
    433
    434int ksmbd_min_protocol(void);
    435int ksmbd_max_protocol(void);
    436
    437int ksmbd_lookup_protocol_idx(char *str);
    438
    439int ksmbd_verify_smb_message(struct ksmbd_work *work);
    440bool ksmbd_smb_request(struct ksmbd_conn *conn);
    441
    442int ksmbd_lookup_dialect_by_id(__le16 *cli_dialects, __le16 dialects_count);
    443
    444int ksmbd_init_smb_server(struct ksmbd_work *work);
    445
    446struct ksmbd_kstat;
    447int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work,
    448				      int info_level,
    449				      struct ksmbd_file *dir,
    450				      struct ksmbd_dir_info *d_info,
    451				      char *search_pattern,
    452				      int (*fn)(struct ksmbd_conn *,
    453						int,
    454						struct ksmbd_dir_info *,
    455						struct ksmbd_kstat *));
    456
    457int ksmbd_extract_shortname(struct ksmbd_conn *conn,
    458			    const char *longname,
    459			    char *shortname);
    460
    461int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command);
    462
    463int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp);
    464int ksmbd_override_fsids(struct ksmbd_work *work);
    465void ksmbd_revert_fsids(struct ksmbd_work *work);
    466
    467unsigned int ksmbd_server_side_copy_max_chunk_count(void);
    468unsigned int ksmbd_server_side_copy_max_chunk_size(void);
    469unsigned int ksmbd_server_side_copy_max_total_size(void);
    470bool is_asterisk(char *p);
    471__le32 smb_map_generic_desired_access(__le32 daccess);
    472
    473static inline unsigned int get_rfc1002_len(void *buf)
    474{
    475	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
    476}
    477
    478static inline void inc_rfc1001_len(void *buf, int count)
    479{
    480	be32_add_cpu((__be32 *)buf, count);
    481}
    482#endif /* __SMB_COMMON_H__ */