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 */ 119 120 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