1 /* SPDX-License-Identifier: LGPL-2.1 */
2 /*
3  *
4  *   Structure definitions for io control for cifs/smb3
5  *
6  *   Copyright (c) 2015 Steve French <steve.french@primarydata.com>
7  *
8  */
9 
10 struct smb_mnt_fs_info {
11 	__u32	version; /* 0001 */
12 	__u16	protocol_id;
13 	__u16	tcon_flags;
14 	__u32	vol_serial_number;
15 	__u32	vol_create_time;
16 	__u32	share_caps;
17 	__u32	share_flags;
18 	__u32	sector_flags;
19 	__u32	optimal_sector_size;
20 	__u32	max_bytes_chunk;
21 	__u32	fs_attributes;
22 	__u32	max_path_component;
23 	__u32	device_type;
24 	__u32	device_characteristics;
25 	__u32	maximal_access;
26 	__u64   cifs_posix_caps;
27 } __packed;
28 
29 struct smb_snapshot_array {
30 	__u32	number_of_snapshots;
31 	__u32	number_of_snapshots_returned;
32 	__u32	snapshot_array_size;
33 	/*	snapshots[]; */
34 } __packed;
35 
36 /* query_info flags */
37 #define PASSTHRU_QUERY_INFO	0x00000000
38 #define PASSTHRU_FSCTL		0x00000001
39 #define PASSTHRU_SET_INFO	0x00000002
40 struct smb_query_info {
41 	__u32   info_type;
42 	__u32   file_info_class;
43 	__u32   additional_information;
44 	__u32   flags;
45 	__u32	input_buffer_length;
46 	__u32	output_buffer_length;
47 	/* char buffer[]; */
48 } __packed;
49 
50 /*
51  * Dumping the commonly used 16 byte (e.g. CCM and GCM128) keys still supported
52  * for backlevel compatibility, but is not sufficient for dumping the less
53  * frequently used GCM256 (32 byte) keys (see the newer "CIFS_DUMP_FULL_KEY"
54  * ioctl for dumping decryption info for GCM256 mounts)
55  */
56 struct smb3_key_debug_info {
57 	__u64	Suid;
58 	__u16	cipher_type;
59 	__u8	auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */
60 	__u8	smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
61 	__u8	smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
62 } __packed;
63 
64 /*
65  * Dump variable-sized keys
66  */
67 struct smb3_full_key_debug_info {
68 	/* INPUT: size of userspace buffer */
69 	__u32   in_size;
70 
71 	/*
72 	 * INPUT: 0 for current user, otherwise session to dump
73 	 * OUTPUT: session id that was dumped
74 	 */
75 	__u64	session_id;
76 	__u16	cipher_type;
77 	__u8    session_key_length;
78 	__u8    server_in_key_length;
79 	__u8    server_out_key_length;
80 	__u8    data[];
81 	/*
82 	 * return this struct with the keys appended at the end:
83 	 * __u8 session_key[session_key_length];
84 	 * __u8 server_in_key[server_in_key_length];
85 	 * __u8 server_out_key[server_out_key_length];
86 	 */
87 } __packed;
88 
89 struct smb3_notify {
90 	__u32	completion_filter;
91 	bool	watch_tree;
92 } __packed;
93 
94 struct smb3_notify_info {
95 	__u32	completion_filter;
96 	bool	watch_tree;
97 	__u32   data_len; /* size of notify data below */
98 	__u8	notify_data[];
99 } __packed;
100 
101 #define CIFS_IOCTL_MAGIC	0xCF
102 #define CIFS_IOC_COPYCHUNK_FILE	_IOW(CIFS_IOCTL_MAGIC, 3, int)
103 #define CIFS_IOC_SET_INTEGRITY  _IO(CIFS_IOCTL_MAGIC, 4)
104 #define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
105 #define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
106 #define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
107 #define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info)
108 #define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify)
109 #define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info)
110 #define CIFS_IOC_NOTIFY_INFO _IOWR(CIFS_IOCTL_MAGIC, 11, struct smb3_notify_info)
111 #define CIFS_IOC_SHUTDOWN _IOR('X', 125, __u32)
112 
113 /*
114  * Flags for going down operation
115  */
116 #define CIFS_GOING_FLAGS_DEFAULT                0x0     /* going down */
117 #define CIFS_GOING_FLAGS_LOGFLUSH               0x1     /* flush log but not data */
118 #define CIFS_GOING_FLAGS_NOLOGFLUSH             0x2     /* don't flush log nor data */
119 
cifs_forced_shutdown(struct cifs_sb_info * sbi)120 static inline bool cifs_forced_shutdown(struct cifs_sb_info *sbi)
121 {
122 	if (CIFS_MOUNT_SHUTDOWN & sbi->mnt_cifs_flags)
123 		return true;
124 	else
125 		return false;
126 }
127