1 /* SPDX-License-Identifier: LGPL-2.1 */
5 * Structure definitions for io control for cifs/smb3
7 * Copyright (c) 2015 Steve French <steve.french@primarydata.com>
11 struct smb_mnt_fs_info {
12 __u32 version; /* 0001 */
15 __u32 vol_serial_number;
16 __u32 vol_create_time;
20 __u32 optimal_sector_size;
21 __u32 max_bytes_chunk;
23 __u32 max_path_component;
25 __u32 device_characteristics;
27 __u64 cifs_posix_caps;
30 struct smb_snapshot_array {
31 __u32 number_of_snapshots;
32 __u32 number_of_snapshots_returned;
33 __u32 snapshot_array_size;
37 /* query_info flags */
38 #define PASSTHRU_QUERY_INFO 0x00000000
39 #define PASSTHRU_FSCTL 0x00000001
40 #define PASSTHRU_SET_INFO 0x00000002
41 struct smb_query_info {
43 __u32 file_info_class;
44 __u32 additional_information;
46 __u32 input_buffer_length;
47 __u32 output_buffer_length;
52 * Dumping the commonly used 16 byte (e.g. CCM and GCM128) keys still supported
53 * for backlevel compatibility, but is not sufficient for dumping the less
54 * frequently used GCM256 (32 byte) keys (see the newer "CIFS_DUMP_FULL_KEY"
55 * ioctl for dumping decryption info for GCM256 mounts)
57 struct smb3_key_debug_info {
60 __u8 auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */
61 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
62 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
66 * Dump variable-sized keys
68 struct smb3_full_key_debug_info {
69 /* INPUT: size of userspace buffer */
73 * INPUT: 0 for current user, otherwise session to dump
74 * OUTPUT: session id that was dumped
78 __u8 session_key_length;
79 __u8 server_in_key_length;
80 __u8 server_out_key_length;
83 * return this struct with the keys appended at the end:
84 * __u8 session_key[session_key_length];
85 * __u8 server_in_key[server_in_key_length];
86 * __u8 server_out_key[server_out_key_length];
91 __u32 completion_filter;
95 #define CIFS_IOCTL_MAGIC 0xCF
96 #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int)
97 #define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4)
98 #define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
99 #define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
100 #define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
101 #define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info)
102 #define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify)
103 #define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info)
104 #define CIFS_IOC_SHUTDOWN _IOR ('X', 125, __u32)
107 * Flags for going down operation
109 #define CIFS_GOING_FLAGS_DEFAULT 0x0 /* going down */
110 #define CIFS_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
111 #define CIFS_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
113 static inline bool cifs_forced_shutdown(struct cifs_sb_info *sbi)
115 if (CIFS_MOUNT_SHUTDOWN & sbi->mnt_cifs_flags)