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_mnt_tcon_info { 30 __u32 tid; 31 __u64 session_id; 32 } __packed; 33 34 struct smb_snapshot_array { 35 __u32 number_of_snapshots; 36 __u32 number_of_snapshots_returned; 37 __u32 snapshot_array_size; 38 /* snapshots[]; */ 39 } __packed; 40 41 /* query_info flags */ 42 #define PASSTHRU_QUERY_INFO 0x00000000 43 #define PASSTHRU_FSCTL 0x00000001 44 #define PASSTHRU_SET_INFO 0x00000002 45 struct smb_query_info { 46 __u32 info_type; 47 __u32 file_info_class; 48 __u32 additional_information; 49 __u32 flags; 50 __u32 input_buffer_length; 51 __u32 output_buffer_length; 52 /* char buffer[]; */ 53 } __packed; 54 55 /* 56 * Dumping the commonly used 16 byte (e.g. CCM and GCM128) keys still supported 57 * for backlevel compatibility, but is not sufficient for dumping the less 58 * frequently used GCM256 (32 byte) keys (see the newer "CIFS_DUMP_FULL_KEY" 59 * ioctl for dumping decryption info for GCM256 mounts) 60 */ 61 struct smb3_key_debug_info { 62 __u64 Suid; 63 __u16 cipher_type; 64 __u8 auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */ 65 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE]; 66 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE]; 67 } __packed; 68 69 /* 70 * Dump variable-sized keys 71 */ 72 struct smb3_full_key_debug_info { 73 /* INPUT: size of userspace buffer */ 74 __u32 in_size; 75 76 /* 77 * INPUT: 0 for current user, otherwise session to dump 78 * OUTPUT: session id that was dumped 79 */ 80 __u64 session_id; 81 __u16 cipher_type; 82 __u8 session_key_length; 83 __u8 server_in_key_length; 84 __u8 server_out_key_length; 85 __u8 data[]; 86 /* 87 * return this struct with the keys appended at the end: 88 * __u8 session_key[session_key_length]; 89 * __u8 server_in_key[server_in_key_length]; 90 * __u8 server_out_key[server_out_key_length]; 91 */ 92 } __packed; 93 94 struct smb3_notify { 95 __u32 completion_filter; 96 bool watch_tree; 97 } __packed; 98 99 struct smb3_notify_info { 100 __u32 completion_filter; 101 bool watch_tree; 102 __u32 data_len; /* size of notify data below */ 103 __u8 notify_data[]; 104 } __packed; 105 106 #define CIFS_IOCTL_MAGIC 0xCF 107 #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int) 108 #define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4) 109 #define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info) 110 #define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array) 111 #define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info) 112 #define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info) 113 #define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify) 114 #define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info) 115 #define CIFS_IOC_NOTIFY_INFO _IOWR(CIFS_IOCTL_MAGIC, 11, struct smb3_notify_info) 116 #define CIFS_IOC_GET_TCON_INFO _IOR(CIFS_IOCTL_MAGIC, 12, struct smb_mnt_tcon_info) 117 #define CIFS_IOC_SHUTDOWN _IOR('X', 125, __u32) 118 119 /* 120 * Flags for going down operation 121 */ 122 #define CIFS_GOING_FLAGS_DEFAULT 0x0 /* going down */ 123 #define CIFS_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 124 #define CIFS_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 125 126 static inline bool cifs_forced_shutdown(struct cifs_sb_info *sbi) 127 { 128 if (CIFS_MOUNT_SHUTDOWN & sbi->mnt_cifs_flags) 129 return true; 130 else 131 return false; 132 } 133