1 /* SPDX-License-Identifier: LGPL-2.1 */
4 * Structure definitions for io control for cifs/smb3
6 * Copyright (c) 2015 Steve French <steve.french@primarydata.com>
10 struct smb_mnt_fs_info {
11 __u32 version; /* 0001 */
14 __u32 vol_serial_number;
15 __u32 vol_create_time;
19 __u32 optimal_sector_size;
20 __u32 max_bytes_chunk;
22 __u32 max_path_component;
24 __u32 device_characteristics;
26 __u64 cifs_posix_caps;
29 struct smb_snapshot_array {
30 __u32 number_of_snapshots;
31 __u32 number_of_snapshots_returned;
32 __u32 snapshot_array_size;
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 {
42 __u32 file_info_class;
43 __u32 additional_information;
45 __u32 input_buffer_length;
46 __u32 output_buffer_length;
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)
56 struct smb3_key_debug_info {
59 __u8 auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */
60 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
61 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
65 * Dump variable-sized keys
67 struct smb3_full_key_debug_info {
68 /* INPUT: size of userspace buffer */
72 * INPUT: 0 for current user, otherwise session to dump
73 * OUTPUT: session id that was dumped
77 __u8 session_key_length;
78 __u8 server_in_key_length;
79 __u8 server_out_key_length;
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];
90 __u32 completion_filter;
94 struct smb3_notify_info {
95 __u32 completion_filter;
97 __u32 data_len; /* size of notify data below */
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)
114 * Flags for going down operation
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 */
120 static inline bool cifs_forced_shutdown(struct cifs_sb_info *sbi)
122 if (CIFS_MOUNT_SHUTDOWN & sbi->mnt_cifs_flags)