1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef __CORE_FS_MGR_H 18 #define __CORE_FS_MGR_H 19 20 #include <stdint.h> 21 #include <linux/dm-ioctl.h> 22 23 // Magic number at start of verity metadata 24 #define VERITY_METADATA_MAGIC_NUMBER 0xb001b001 25 26 // Replacement magic number at start of verity metadata to cleanly 27 // turn verity off in userdebug builds. 28 #define VERITY_METADATA_MAGIC_DISABLE 0x46464f56 // "VOFF" 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 // Verity modes 35 enum verity_mode { 36 VERITY_MODE_EIO = 0, 37 VERITY_MODE_LOGGING = 1, 38 VERITY_MODE_RESTART = 2, 39 VERITY_MODE_LAST = VERITY_MODE_RESTART, 40 VERITY_MODE_DEFAULT = VERITY_MODE_RESTART 41 }; 42 43 /* 44 * The entries must be kept in the same order as they were seen in the fstab. 45 * Unless explicitly requested, a lookup on mount point should always 46 * return the 1st one. 47 */ 48 struct fstab { 49 int num_entries; 50 struct fstab_rec *recs; 51 char *fstab_filename; 52 }; 53 54 struct fstab_rec { 55 char *blk_device; 56 char *mount_point; 57 char *fs_type; 58 unsigned long flags; 59 char *fs_options; 60 int fs_mgr_flags; 61 char *key_loc; 62 char *verity_loc; 63 long long length; 64 char *label; 65 int partnum; 66 int swap_prio; 67 unsigned int zram_size; 68 unsigned int file_encryption_mode; 69 }; 70 71 // Callback function for verity status 72 typedef void (*fs_mgr_verity_state_callback)(struct fstab_rec *fstab, 73 const char *mount_point, int mode, int status); 74 75 struct fstab *fs_mgr_read_fstab(const char *fstab_path); 76 void fs_mgr_free_fstab(struct fstab *fstab); 77 78 #define FS_MGR_MNTALL_DEV_FILE_ENCRYPTED 5 79 #define FS_MGR_MNTALL_DEV_NEEDS_RECOVERY 4 80 #define FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION 3 81 #define FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED 2 82 #define FS_MGR_MNTALL_DEV_NOT_ENCRYPTED 1 83 #define FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE 0 84 #define FS_MGR_MNTALL_FAIL -1 85 int fs_mgr_mount_all(struct fstab *fstab); 86 87 #define FS_MGR_DOMNT_FAILED -1 88 #define FS_MGR_DOMNT_BUSY -2 89 90 int fs_mgr_do_mount(struct fstab *fstab, char *n_name, char *n_blk_device, 91 char *tmp_mount_point); 92 int fs_mgr_do_tmpfs_mount(char *n_name); 93 int fs_mgr_unmount_all(struct fstab *fstab); 94 int fs_mgr_get_crypt_info(struct fstab *fstab, char *key_loc, 95 char *real_blk_device, int size); 96 int fs_mgr_load_verity_state(int *mode); 97 int fs_mgr_update_verity_state(fs_mgr_verity_state_callback callback); 98 int fs_mgr_add_entry(struct fstab *fstab, 99 const char *mount_point, const char *fs_type, 100 const char *blk_device); 101 struct fstab_rec *fs_mgr_get_entry_for_mount_point(struct fstab *fstab, const char *path); 102 int fs_mgr_is_voldmanaged(const struct fstab_rec *fstab); 103 int fs_mgr_is_nonremovable(const struct fstab_rec *fstab); 104 int fs_mgr_is_verified(const struct fstab_rec *fstab); 105 int fs_mgr_is_encryptable(const struct fstab_rec *fstab); 106 int fs_mgr_is_file_encrypted(const struct fstab_rec *fstab); 107 const char* fs_mgr_get_file_encryption_mode(const struct fstab_rec *fstab); 108 int fs_mgr_is_convertible_to_fbe(const struct fstab_rec *fstab); 109 int fs_mgr_is_noemulatedsd(const struct fstab_rec *fstab); 110 int fs_mgr_is_notrim(struct fstab_rec *fstab); 111 int fs_mgr_is_formattable(struct fstab_rec *fstab); 112 int fs_mgr_is_nofail(struct fstab_rec *fstab); 113 int fs_mgr_swapon_all(struct fstab *fstab); 114 115 int fs_mgr_do_format(struct fstab_rec *fstab); 116 117 #ifdef __cplusplus 118 } 119 #endif 120 121 #endif /* __CORE_FS_MGR_H */ 122
