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 #define CIFS_IOCTL_MAGIC 0xCF
95 #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int)
96 #define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4)
97 #define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
98 #define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
99 #define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
100 #define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info)
101 #define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify)
102 #define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info)
103 #define CIFS_IOC_SHUTDOWN _IOR ('X', 125, __u32)
104
105 /*
106 * Flags for going down operation
107 */
108 #define CIFS_GOING_FLAGS_DEFAULT 0x0 /* going down */
109 #define CIFS_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
110 #define CIFS_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
111
cifs_forced_shutdown(struct cifs_sb_info * sbi)112 static inline bool cifs_forced_shutdown(struct cifs_sb_info *sbi)
113 {
114 if (CIFS_MOUNT_SHUTDOWN & sbi->mnt_cifs_flags)
115 return true;
116 else
117 return false;
118 }
119