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Diffstat (limited to 'src/home/homework.h')
| -rw-r--r-- | src/home/homework.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/home/homework.h b/src/home/homework.h new file mode 100644 index 0000000..cef3f4e --- /dev/null +++ b/src/home/homework.h @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include <sys/vfs.h> + +#include "sd-id128.h" + +#include "cryptsetup-util.h" +#include "homework-password-cache.h" +#include "loop-util.h" +#include "missing_fs.h" /* for FS_KEY_DESCRIPTOR_SIZE, do not include linux/fs.h */ +#include "missing_keyctl.h" +#include "missing_syscall.h" +#include "user-record.h" +#include "user-record-util.h" + +typedef struct HomeSetup { + char *dm_name; /* "home-<username>" */ + char *dm_node; /* "/dev/mapper/home-<username>" */ + + LoopDevice *loop; + struct crypt_device *crypt_device; + int root_fd; + int image_fd; + sd_id128_t found_partition_uuid; + sd_id128_t found_luks_uuid; + sd_id128_t found_fs_uuid; + + uint8_t fscrypt_key_descriptor[FS_KEY_DESCRIPTOR_SIZE]; + + void *volume_key; + size_t volume_key_size; + + key_serial_t key_serial; + + bool undo_dm:1; + bool undo_mount:1; /* Whether to unmount /run/systemd/user-home-mount */ + bool do_offline_fitrim:1; + bool do_offline_fallocate:1; + bool do_mark_clean:1; + bool do_drop_caches:1; + + uint64_t partition_offset; + uint64_t partition_size; + + char *mount_suffix; /* The directory to use as home dir is this path below /run/systemd/user-home-mount */ + + char *temporary_image_path; +} HomeSetup; + +#define HOME_SETUP_INIT \ + { \ + .root_fd = -EBADF, \ + .image_fd = -EBADF, \ + .partition_offset = UINT64_MAX, \ + .partition_size = UINT64_MAX, \ + .key_serial = -1, \ + } + +/* Various flags for the operation of setting up a home directory */ +typedef enum HomeSetupFlags { + HOME_SETUP_ALREADY_ACTIVATED = 1 << 0, /* Open an already activated home, rather than activate it afresh */ + + /* CIFS backend: */ + HOME_SETUP_CIFS_MKDIR = 1 << 1, /* Create CIFS subdir when missing */ + + /* Applies only for resize operations */ + HOME_SETUP_RESIZE_DONT_SYNC_IDENTITIES = 1 << 2, /* Don't sync identity records into home and LUKS header */ + HOME_SETUP_RESIZE_MINIMIZE = 1 << 3, /* Shrink to minimal size */ + HOME_SETUP_RESIZE_DONT_GROW = 1 << 4, /* If the resize would grow, gracefully terminate operation */ + HOME_SETUP_RESIZE_DONT_SHRINK = 1 << 5, /* If the resize would shrink, gracefully terminate operation */ + HOME_SETUP_RESIZE_DONT_UNDO = 1 << 6, /* Leave loopback/DM device context open after successful operation */ +} HomeSetupFlags; + +int home_setup_done(HomeSetup *setup); + +int home_setup_undo_mount(HomeSetup *setup, int level); +int home_setup_undo_dm(HomeSetup *setup, int level); + +int keyring_unlink(key_serial_t k); + +int home_setup(UserRecord *h, HomeSetupFlags flags, HomeSetup *setup, PasswordCache *cache, UserRecord **ret_header_home); + +int home_refresh(UserRecord *h, HomeSetupFlags flags, HomeSetup *setup, UserRecord *header_home, PasswordCache *cache, struct statfs *ret_statfs, UserRecord **ret_new_home); + +int home_maybe_shift_uid(UserRecord *h, HomeSetupFlags flags, HomeSetup *setup); +int home_populate(UserRecord *h, int dir_fd); + +int home_load_embedded_identity(UserRecord *h, int root_fd, UserRecord *header_home, UserReconcileMode mode, PasswordCache *cache, UserRecord **ret_embedded_home, UserRecord **ret_new_home); +int home_store_embedded_identity(UserRecord *h, int root_fd, uid_t uid, UserRecord *old_home); +int home_extend_embedded_identity(UserRecord *h, UserRecord *used, HomeSetup *setup); + +int user_record_authenticate(UserRecord *h, UserRecord *secret, PasswordCache *cache, bool strict_verify); + +int home_sync_and_statfs(int root_fd, struct statfs *ret); + +#define HOME_RUNTIME_WORK_DIR "/run/systemd/user-home-mount" |