WSL2-Linux-Kernel/fs/cifs/smb2pdu.h

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/* SPDX-License-Identifier: LGPL-2.1 */
/*
*
* Copyright (c) International Business Machines Corp., 2009, 2013
* Etersoft, 2012
* Author(s): Steve French (sfrench@us.ibm.com)
* Pavel Shilovsky (pshilovsky@samba.org) 2012
*
*/
#ifndef _SMB2PDU_H
#define _SMB2PDU_H
#include <net/sock.h>
#include "cifsacl.h"
/* 52 transform hdr + 64 hdr + 88 create rsp */
#define SMB2_TRANSFORM_HEADER_SIZE 52
#define MAX_SMB2_HDR_SIZE 204
/* The total header size for SMB2 read and write */
#define SMB2_READWRITE_PDU_HEADER_SIZE (48 + sizeof(struct smb2_hdr))
/* See MS-SMB2 2.2.43 */
struct smb2_rdma_transform {
__le16 RdmaDescriptorOffset;
__le16 RdmaDescriptorLength;
__le32 Channel; /* for values see channel description in smb2 read above */
__le16 TransformCount;
__le16 Reserved1;
__le32 Reserved2;
} __packed;
/* TransformType */
#define SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION 0x0001
#define SMB2_RDMA_TRANSFORM_TYPE_SIGNING 0x0002
struct smb2_rdma_crypto_transform {
__le16 TransformType;
__le16 SignatureLength;
__le16 NonceLength;
__u16 Reserved;
__u8 Signature[]; /* variable length */
/* u8 Nonce[] */
/* followed by padding */
} __packed;
/*
* Definitions for SMB2 Protocol Data Units (network frames)
*
* See MS-SMB2.PDF specification for protocol details.
* The Naming convention is the lower case version of the SMB2
* command code name for the struct. Note that structures must be packed.
*
*/
#define COMPOUND_FID 0xFFFFFFFFFFFFFFFFULL
#define SMB2_SYMLINK_STRUCT_SIZE \
smb3: Replace smb2pdu 1-element arrays with flex-arrays The kernel is globally removing the ambiguous 0-length and 1-element arrays in favor of flexible arrays, so that we can gain both compile-time and run-time array bounds checking[1]. Replace the trailing 1-element array with a flexible array in the following structures: struct smb2_err_rsp struct smb2_tree_connect_req struct smb2_negotiate_rsp struct smb2_sess_setup_req struct smb2_sess_setup_rsp struct smb2_read_req struct smb2_read_rsp struct smb2_write_req struct smb2_write_rsp struct smb2_query_directory_req struct smb2_query_directory_rsp struct smb2_set_info_req struct smb2_change_notify_rsp struct smb2_create_rsp struct smb2_query_info_req struct smb2_query_info_rsp Replace the trailing 1-element array with a flexible array, but leave the existing structure padding: struct smb2_file_all_info struct smb2_lock_req Adjust all related size calculations to match the changes to sizeof(). No machine code output or .data section differences are produced after these changes. [1] For lots of details, see both: https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays https://people.kernel.org/kees/bounded-flexible-arrays-in-c Cc: Steve French <sfrench@samba.org> Cc: Paulo Alcantara <pc@cjr.nz> Cc: Ronnie Sahlberg <lsahlber@redhat.com> Cc: Shyam Prasad N <sprasad@microsoft.com> Cc: Tom Talpey <tom@talpey.com> Cc: Namjae Jeon <linkinjeon@kernel.org> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: linux-cifs@vger.kernel.org Cc: samba-technical@lists.samba.org Reviewed-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2023-02-18 03:24:40 +03:00
(sizeof(struct smb2_err_rsp) + sizeof(struct smb2_symlink_err_rsp))
#define SYMLINK_ERROR_TAG 0x4c4d5953
struct smb2_symlink_err_rsp {
__le32 SymLinkLength;
__le32 SymLinkErrorTag;
__le32 ReparseTag;
__le16 ReparseDataLength;
__le16 UnparsedPathLength;
__le16 SubstituteNameOffset;
__le16 SubstituteNameLength;
__le16 PrintNameOffset;
__le16 PrintNameLength;
__le32 Flags;
__u8 PathBuffer[];
} __packed;
/* SMB 3.1.1 and later dialects. See MS-SMB2 section 2.2.2.1 */
struct smb2_error_context_rsp {
__le32 ErrorDataLength;
__le32 ErrorId;
__u8 ErrorContextData; /* ErrorDataLength long array */
} __packed;
/* ErrorId values */
#define SMB2_ERROR_ID_DEFAULT 0x00000000
#define SMB2_ERROR_ID_SHARE_REDIRECT cpu_to_le32(0x72645253) /* "rdRS" */
/* Defines for Type field below (see MS-SMB2 2.2.2.2.2.1) */
#define MOVE_DST_IPADDR_V4 cpu_to_le32(0x00000001)
#define MOVE_DST_IPADDR_V6 cpu_to_le32(0x00000002)
struct move_dst_ipaddr {
__le32 Type;
__u32 Reserved;
__u8 address[16]; /* IPv4 followed by 12 bytes rsvd or IPv6 address */
} __packed;
struct share_redirect_error_context_rsp {
__le32 StructureSize;
__le32 NotificationType;
__le32 ResourceNameOffset;
__le32 ResourceNameLength;
__le16 Reserved;
__le16 TargetType;
__le32 IPAddrCount;
struct move_dst_ipaddr IpAddrMoveList[];
/* __u8 ResourceName[] */ /* Name of share as counted Unicode string */
} __packed;
/*
* Maximum number of iovs we need for an open/create request.
* [0] : struct smb2_create_req
* [1] : path
* [2] : lease context
* [3] : durable context
* [4] : posix context
* [5] : time warp context
* [6] : query id context
* [7] : compound padding
*/
#define SMB2_CREATE_IOV_SIZE 8
/*
* Maximum size of a SMB2_CREATE response is 64 (smb2 header) +
* 88 (fixed part of create response) + 520 (path) + 208 (contexts) +
* 2 bytes of padding.
*/
#define MAX_SMB2_CREATE_RESPONSE_SIZE 880
#define SMB2_LEASE_READ_CACHING_HE 0x01
#define SMB2_LEASE_HANDLE_CACHING_HE 0x02
#define SMB2_LEASE_WRITE_CACHING_HE 0x04
/* See MS-SMB2 2.2.13.2.11 */
/* Flags */
#define SMB2_DHANDLE_FLAG_PERSISTENT 0x00000002
struct durable_context_v2 {
__le32 Timeout;
__le32 Flags;
__u64 Reserved;
__u8 CreateGuid[16];
} __packed;
struct create_durable_v2 {
struct create_context ccontext;
__u8 Name[8];
struct durable_context_v2 dcontext;
} __packed;
/* See MS-SMB2 2.2.13.2.12 */
struct durable_reconnect_context_v2 {
struct {
__u64 PersistentFileId;
__u64 VolatileFileId;
} Fid;
__u8 CreateGuid[16];
__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
} __packed;
/* See MS-SMB2 2.2.14.2.12 */
struct durable_reconnect_context_v2_rsp {
__le32 Timeout;
__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
} __packed;
struct create_durable_handle_reconnect_v2 {
struct create_context ccontext;
__u8 Name[8];
struct durable_reconnect_context_v2 dcontext;
__u8 Pad[4];
} __packed;
smb3: allow previous versions to be mounted with snapshot= mount parm mounting with the "snapshots=" mount parm allows a read-only view of a previous version of a file system (see MS-SMB2 and "timewarp" tokens, section 2.2.13.2.6) based on the timestamp passed in on the snapshots mount parm. Add processing to optionally send this create context. Example output: /mnt1 is mounted with "snapshots=..." and will see an earlier version of the directory, with three fewer files than /mnt2 the current version of the directory. root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# cat /proc/mounts | grep cifs //172.22.149.186/public /mnt1 cifs ro,relatime,vers=default,cache=strict,username=smfrench,uid=0,noforceuid,gid=0,noforcegid,addr=172.22.149.186,file_mode=0755,dir_mode=0755,soft,nounix,mapposix,rsize=1048576,wsize=1048576,echo_interval=60,snapshot=131748608570000000,actimeo=1 //172.22.149.186/public /mnt2 cifs rw,relatime,vers=default,cache=strict,username=smfrench,uid=0,noforceuid,gid=0,noforcegid,addr=172.22.149.186,file_mode=0755,dir_mode=0755,soft,nounix,mapposix,rsize=1048576,wsize=1048576,echo_interval=60,actimeo=1 root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt1 EmptyDir newerdir root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt1/newerdir root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt2 EmptyDir file newerdir newestdir timestamp-trace.cap root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt2/newerdir new-file-not-in-snapshot Snapshots are extremely useful for comparing previous versions of files or directories, and recovering from data corruptions or mistakes. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-08-10 10:25:06 +03:00
/* See MS-SMB2 2.2.13.2.5 */
struct crt_twarp_ctxt {
struct create_context ccontext;
__u8 Name[8];
__le64 Timestamp;
} __packed;
/* See MS-SMB2 2.2.13.2.9 */
struct crt_query_id_ctxt {
struct create_context ccontext;
__u8 Name[8];
} __packed;
struct crt_sd_ctxt {
struct create_context ccontext;
__u8 Name[8];
struct smb3_sd sd;
} __packed;
#define COPY_CHUNK_RES_KEY_SIZE 24
struct resume_key_req {
char ResumeKey[COPY_CHUNK_RES_KEY_SIZE];
__le32 ContextLength; /* MBZ */
char Context[]; /* ignored, Windows sets to 4 bytes of zero */
} __packed;
/* this goes in the ioctl buffer when doing a copychunk request */
struct copychunk_ioctl {
char SourceKey[COPY_CHUNK_RES_KEY_SIZE];
__le32 ChunkCount; /* we are only sending 1 */
__le32 Reserved;
/* array will only be one chunk long for us */
__le64 SourceOffset;
__le64 TargetOffset;
__le32 Length; /* how many bytes to copy */
__u32 Reserved2;
} __packed;
struct copychunk_ioctl_rsp {
__le32 ChunksWritten;
__le32 ChunkBytesWritten;
__le32 TotalBytesWritten;
} __packed;
/* See MS-FSCC 2.3.29 and 2.3.30 */
struct get_retrieval_pointer_count_req {
__le64 StartingVcn; /* virtual cluster number (signed) */
} __packed;
struct get_retrieval_pointer_count_rsp {
__le32 ExtentCount;
} __packed;
/*
* See MS-FSCC 2.3.33 and 2.3.34
* request is the same as get_retrieval_point_count_req struct above
*/
struct smb3_extents {
__le64 NextVcn;
__le64 Lcn; /* logical cluster number */
} __packed;
struct get_retrieval_pointers_refcount_rsp {
__le32 ExtentCount;
__u32 Reserved;
__le64 StartingVcn;
struct smb3_extents extents[];
} __packed;
/* See MS-DFSC 2.2.2 */
struct fsctl_get_dfs_referral_req {
__le16 MaxReferralLevel;
__u8 RequestFileName[];
} __packed;
/* DFS response is struct get_dfs_refer_rsp */
/* See MS-SMB2 2.2.31.3 */
struct network_resiliency_req {
__le32 Timeout;
__le32 Reserved;
} __packed;
/* There is no buffer for the response ie no struct network_resiliency_rsp */
#define RSS_CAPABLE cpu_to_le32(0x00000001)
#define RDMA_CAPABLE cpu_to_le32(0x00000002)
#define INTERNETWORK cpu_to_le16(0x0002)
#define INTERNETWORKV6 cpu_to_le16(0x0017)
struct network_interface_info_ioctl_rsp {
__le32 Next; /* next interface. zero if this is last one */
__le32 IfIndex;
__le32 Capability; /* RSS or RDMA Capable */
__le32 Reserved;
__le64 LinkSpeed;
__le16 Family;
__u8 Buffer[126];
} __packed;
struct iface_info_ipv4 {
__be16 Port;
__be32 IPv4Address;
__be64 Reserved;
} __packed;
struct iface_info_ipv6 {
__be16 Port;
__be32 FlowInfo;
__u8 IPv6Address[16];
__be32 ScopeId;
} __packed;
#define NO_FILE_ID 0xFFFFFFFFFFFFFFFFULL /* general ioctls to srv not to file */
struct compress_ioctl {
__le16 CompressionState; /* See cifspdu.h for possible flag values */
} __packed;
/*
* Maximum number of iovs we need for an ioctl request.
* [0] : struct smb2_ioctl_req
* [1] : in_data
*/
#define SMB2_IOCTL_IOV_SIZE 2
/*
* PDU query infolevel structure definitions
* BB consider moving to a different header
*/
struct smb2_file_full_ea_info { /* encoding of response for level 15 */
__le32 next_entry_offset;
__u8 flags;
__u8 ea_name_length;
__le16 ea_value_length;
char ea_data[]; /* \0 terminated name plus value */
} __packed; /* level 15 Set */
smb3: add support for stat of WSL reparse points for special file types This is needed so when mounting to Windows we do not misinterpret various special files created by Linux (WSL) as symlinks. An earlier patch addressed readdir. This patch fixes stat (getattr). With this patch:   File: /mnt1/char   Size: 0          Blocks: 0          IO Block: 16384  character special file Device: 34h/52d Inode: 844424930132069  Links: 1     Device type: 0,0 Access: (0755/crwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/fifo   Size: 0          Blocks: 0          IO Block: 16384  fifo Device: 34h/52d Inode: 1125899906842722  Links: 1 Access: (0755/prwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/block   Size: 0          Blocks: 0          IO Block: 16384  block special file Device: 34h/52d Inode: 844424930132068  Links: 1     Device type: 0,0 Access: (0755/brwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500  Birth: - without the patch all show up incorrectly as symlinks with annoying "operation not supported error also returned"   File: /mnt1/charstat: cannot read symbolic link '/mnt1/char': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 844424930132069  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/fifostat: cannot read symbolic link '/mnt1/fifo': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 1125899906842722  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/blockstat: cannot read symbolic link '/mnt1/block': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 844424930132068  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500 Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2020-10-23 06:03:14 +03:00
struct smb2_file_reparse_point_info {
__le64 IndexNumber;
__le32 Tag;
} __packed;
struct smb2_file_network_open_info {
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
__le64 ChangeTime;
__le64 AllocationSize;
__le64 EndOfFile;
__le32 Attributes;
__le32 Reserved;
} __packed; /* level 34 Query also similar returned in close rsp and open rsp */
/* See MS-FSCC 2.4.21 */
struct smb2_file_id_information {
__le64 VolumeSerialNumber;
__u64 PersistentFileId; /* opaque endianness */
__u64 VolatileFileId; /* opaque endianness */
} __packed; /* level 59 */
/* See MS-FSCC 2.4.18 */
struct smb2_file_id_extd_directory_info {
__le32 NextEntryOffset;
__u32 FileIndex;
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
__le64 ChangeTime;
__le64 EndOfFile;
__le64 AllocationSize;
__le32 FileAttributes;
__le32 FileNameLength;
__le32 EaSize; /* EA size */
__le32 ReparsePointTag; /* valid if FILE_ATTR_REPARSE_POINT set in FileAttributes */
__le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit */
cifs: Replace remaining 1-element arrays The kernel is globally removing the ambiguous 0-length and 1-element arrays in favor of flexible arrays, so that we can gain both compile-time and run-time array bounds checking[1]. Replace the trailing 1-element array with a flexible array in the following structures: struct cifs_spnego_msg struct cifs_quota_data struct get_dfs_referral_rsp struct file_alt_name_info NEGOTIATE_RSP SESSION_SETUP_ANDX TCONX_REQ TCONX_RSP TCONX_RSP_EXT ECHO_REQ ECHO_RSP OPEN_REQ OPENX_REQ LOCK_REQ RENAME_REQ COPY_REQ COPY_RSP NT_RENAME_REQ DELETE_FILE_REQ DELETE_DIRECTORY_REQ CREATE_DIRECTORY_REQ QUERY_INFORMATION_REQ SETATTR_REQ TRANSACT_IOCTL_REQ TRANSACT_CHANGE_NOTIFY_REQ TRANSACTION2_QPI_REQ TRANSACTION2_SPI_REQ TRANSACTION2_FFIRST_REQ TRANSACTION2_GET_DFS_REFER_REQ FILE_UNIX_LINK_INFO FILE_DIRECTORY_INFO FILE_FULL_DIRECTORY_INFO SEARCH_ID_FULL_DIR_INFO FILE_BOTH_DIRECTORY_INFO FIND_FILE_STANDARD_INFO Replace the trailing 1-element array with a flexible array, but leave the existing structure padding: FILE_ALL_INFO FILE_UNIX_INFO Remove unused structures: struct gea struct gealist Adjust all related size calculations to match the changes to sizeof(). No machine code output differences are produced after these changes. [1] For lots of details, see both: https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays https://people.kernel.org/kees/bounded-flexible-arrays-in-c Cc: Steve French <sfrench@samba.org> Cc: Paulo Alcantara <pc@cjr.nz> Cc: Ronnie Sahlberg <lsahlber@redhat.com> Cc: Shyam Prasad N <sprasad@microsoft.com> Cc: linux-cifs@vger.kernel.org Cc: samba-technical@lists.samba.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2023-02-15 03:09:45 +03:00
char FileName[];
} __packed; /* level 60 */
extern char smb2_padding[7];
/* equivalent of the contents of SMB3.1.1 POSIX open context response */
struct create_posix_rsp {
u32 nlink;
u32 reparse_tag;
u32 mode;
struct cifs_sid owner; /* var-sized on the wire */
struct cifs_sid group; /* var-sized on the wire */
} __packed;
#define SMB2_QUERY_DIRECTORY_IOV_SIZE 2
/*
* SMB2-only POSIX info level for query dir
*
* See posix_info_sid_size(), posix_info_extra_size() and
* posix_info_parse() to help with the handling of this struct.
*/
struct smb2_posix_info {
__le32 NextEntryOffset;
__u32 Ignored;
__le64 CreationTime;
__le64 LastAccessTime;
__le64 LastWriteTime;
__le64 ChangeTime;
__le64 EndOfFile;
__le64 AllocationSize;
__le32 DosAttributes;
__le64 Inode;
__le32 DeviceId;
__le32 Zero;
/* beginning of POSIX Create Context Response */
__le32 HardLinks;
__le32 ReparseTag;
__le32 Mode;
/*
* var sized owner SID
* var sized group SID
* le32 filenamelength
* u8 filename[]
*/
} __packed;
/*
* Parsed version of the above struct. Allows direct access to the
* variable length fields
*/
struct smb2_posix_info_parsed {
const struct smb2_posix_info *base;
size_t size;
struct cifs_sid owner;
struct cifs_sid group;
int name_len;
const u8 *name;
};
#endif /* _SMB2PDU_H */