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extmod/vfs: Factor out vfs mount-and-chdir helper from stm32.

This commit is contained in:
Damien George 2020-03-11 14:24:26 +11:00
parent 554c01fc25
commit ed848553b4
3 changed files with 25 additions and 22 deletions
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21
extmod/vfs.c
View File

@ -524,4 +524,25 @@ mp_obj_t mp_vfs_statvfs(mp_obj_t path_in) {
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_statvfs_obj, mp_vfs_statvfs);
// This is a C-level helper function for ports to use if needed.
int mp_vfs_mount_and_chdir_protected(mp_obj_t bdev, mp_obj_t mount_point) {
nlr_buf_t nlr;
mp_int_t ret = -MP_EIO;
if (nlr_push(&nlr) == 0) {
mp_obj_t args[] = { bdev, mount_point };
mp_vfs_mount(2, args, (mp_map_t *)&mp_const_empty_map);
mp_vfs_chdir(mount_point);
ret = 0; // success
nlr_pop();
} else {
mp_obj_base_t *exc = nlr.ret_val;
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(exc->type), MP_OBJ_FROM_PTR(&mp_type_OSError))) {
mp_obj_t v = mp_obj_exception_get_value(MP_OBJ_FROM_PTR(exc));
mp_obj_get_int_maybe(v, &ret); // get errno value
ret = -ret;
}
}
return ret;
}
#endif // MICROPY_VFS

2
extmod/vfs.h
View File

@ -102,6 +102,8 @@ mp_obj_t mp_vfs_rmdir(mp_obj_t path_in);
mp_obj_t mp_vfs_stat(mp_obj_t path_in);
mp_obj_t mp_vfs_statvfs(mp_obj_t path_in);
int mp_vfs_mount_and_chdir_protected(mp_obj_t bdev, mp_obj_t mount_point);
MP_DECLARE_CONST_FUN_OBJ_KW(mp_vfs_mount_obj);
MP_DECLARE_CONST_FUN_OBJ_1(mp_vfs_umount_obj);
MP_DECLARE_CONST_FUN_OBJ_KW(mp_vfs_open_obj);

24
ports/stm32/main.c
View File

@ -161,26 +161,6 @@ STATIC mp_obj_t pyb_main(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_a
MP_DEFINE_CONST_FUN_OBJ_KW(pyb_main_obj, 1, pyb_main);
#if MICROPY_HW_ENABLE_STORAGE
STATIC int vfs_mount_and_chdir(mp_obj_t bdev, mp_obj_t mount_point) {
nlr_buf_t nlr;
mp_int_t ret = -MP_EIO;
if (nlr_push(&nlr) == 0) {
mp_obj_t args[] = { bdev, mount_point };
mp_vfs_mount(2, args, (mp_map_t *)&mp_const_empty_map);
mp_vfs_chdir(mount_point);
ret = 0; // success
nlr_pop();
} else {
mp_obj_base_t *exc = nlr.ret_val;
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(exc->type), MP_OBJ_FROM_PTR(&mp_type_OSError))) {
mp_obj_t v = mp_obj_exception_get_value(MP_OBJ_FROM_PTR(exc));
mp_obj_get_int_maybe(v, &ret); // get errno value
ret = -ret;
}
}
return ret;
}
// avoid inlining to avoid stack usage within main()
MP_NOINLINE STATIC bool init_flash_fs(uint reset_mode) {
if (reset_mode == 3) {
@ -230,14 +210,14 @@ MP_NOINLINE STATIC bool init_flash_fs(uint reset_mode) {
// Try to mount the flash on "/flash" and chdir to it for the boot-up directory.
mp_obj_t mount_point = MP_OBJ_NEW_QSTR(MP_QSTR__slash_flash);
int ret = vfs_mount_and_chdir(bdev, mount_point);
int ret = mp_vfs_mount_and_chdir_protected(bdev, mount_point);
if (ret == -MP_ENODEV && bdev == MP_OBJ_FROM_PTR(&pyb_flash_obj) && reset_mode != 3) {
// No filesystem, bdev is still the default (so didn't detect a possibly corrupt littlefs),
// and didn't already create a filesystem, so try to create a fresh one now.
ret = factory_reset_create_filesystem();
if (ret == 0) {
ret = vfs_mount_and_chdir(bdev, mount_point);
ret = mp_vfs_mount_and_chdir_protected(bdev, mount_point);
}
}