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tee_fs_rpc.c
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/*
* Copyright (c) 2016, Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <kernel/msg_param.h>
#include <kernel/tee_misc.h>
#include <kernel/thread.h>
#include <mm/core_memprot.h>
#include <optee_msg_supplicant.h>
#include <stdlib.h>
#include <string_ext.h>
#include <string.h>
#include <tee/tee_fs.h>
#include <tee/tee_fs_rpc.h>
#include <tee/tee_pobj.h>
#include <tee/tee_svc_storage.h>
#include <trace.h>
#include <util.h>
struct tee_fs_dir {
int nw_dir;
struct tee_fs_dirent d;
};
static TEE_Result operation_commit(struct tee_fs_rpc_operation *op)
{
return thread_rpc_cmd(op->id, op->num_params, op->params);
}
static TEE_Result operation_open(uint32_t id, unsigned int cmd,
struct tee_pobj *po, int *fd)
{
struct tee_fs_rpc_operation op = { .id = id, .num_params = 3 };
struct mobj *mobj;
TEE_Result res;
void *va;
uint64_t cookie;
va = tee_fs_rpc_cache_alloc(TEE_FS_NAME_MAX, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = cmd;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, TEE_FS_NAME_MAX,
cookie, MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
res = tee_svc_storage_create_filename(va, TEE_FS_NAME_MAX,
po, po->temporary);
if (res != TEE_SUCCESS)
return res;
op.params[2].attr = OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT;
res = operation_commit(&op);
if (res == TEE_SUCCESS)
*fd = op.params[2].u.value.a;
return res;
}
TEE_Result tee_fs_rpc_open(uint32_t id, struct tee_pobj *po, int *fd)
{
return operation_open(id, OPTEE_MRF_OPEN, po, fd);
}
TEE_Result tee_fs_rpc_create(uint32_t id, struct tee_pobj *po, int *fd)
{
return operation_open(id, OPTEE_MRF_CREATE, po, fd);
}
static TEE_Result operation_open_dfh(uint32_t id, unsigned int cmd,
const struct tee_fs_dirfile_fileh *dfh,
int *fd)
{
struct tee_fs_rpc_operation op = { .id = id, .num_params = 3 };
struct mobj *mobj;
TEE_Result res;
void *va;
uint64_t cookie;
va = tee_fs_rpc_cache_alloc(TEE_FS_NAME_MAX, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = cmd;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, TEE_FS_NAME_MAX,
cookie, MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
res = tee_svc_storage_create_filename_dfh(va, TEE_FS_NAME_MAX, dfh);
if (res != TEE_SUCCESS)
return res;
op.params[2].attr = OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT;
res = operation_commit(&op);
if (res == TEE_SUCCESS)
*fd = op.params[2].u.value.a;
return res;
}
TEE_Result tee_fs_rpc_open_dfh(uint32_t id,
const struct tee_fs_dirfile_fileh *dfh, int *fd)
{
return operation_open_dfh(id, OPTEE_MRF_OPEN, dfh, fd);
}
TEE_Result tee_fs_rpc_create_dfh(uint32_t id,
const struct tee_fs_dirfile_fileh *dfh,
int *fd)
{
return operation_open_dfh(id, OPTEE_MRF_CREATE, dfh, fd);
}
TEE_Result tee_fs_rpc_close(uint32_t id, int fd)
{
struct tee_fs_rpc_operation op = { .id = id, .num_params = 1 };
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_CLOSE;
op.params[0].u.value.b = fd;
return operation_commit(&op);
}
TEE_Result tee_fs_rpc_read_init(struct tee_fs_rpc_operation *op,
uint32_t id, int fd, tee_fs_off_t offset,
size_t data_len, void **out_data)
{
struct mobj *mobj;
uint8_t *va;
uint64_t cookie;
if (offset < 0)
return TEE_ERROR_BAD_PARAMETERS;
va = tee_fs_rpc_cache_alloc(data_len, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
memset(op, 0, sizeof(*op));
op->id = id;
op->num_params = 2;
op->params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op->params[0].u.value.a = OPTEE_MRF_READ;
op->params[0].u.value.b = fd;
op->params[0].u.value.c = offset;
if (!msg_param_init_memparam(op->params + 1, mobj, 0, data_len, cookie,
MSG_PARAM_MEM_DIR_OUT))
return TEE_ERROR_BAD_STATE;
*out_data = va;
return TEE_SUCCESS;
}
TEE_Result tee_fs_rpc_read_final(struct tee_fs_rpc_operation *op,
size_t *data_len)
{
TEE_Result res = operation_commit(op);
if (res == TEE_SUCCESS)
*data_len = msg_param_get_buf_size(op->params + 1);
return res;
}
TEE_Result tee_fs_rpc_write_init(struct tee_fs_rpc_operation *op,
uint32_t id, int fd, tee_fs_off_t offset,
size_t data_len, void **data)
{
struct mobj *mobj;
uint8_t *va;
uint64_t cookie;
if (offset < 0)
return TEE_ERROR_BAD_PARAMETERS;
va = tee_fs_rpc_cache_alloc(data_len, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
memset(op, 0, sizeof(*op));
op->id = id;
op->num_params = 2;
op->params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op->params[0].u.value.a = OPTEE_MRF_WRITE;
op->params[0].u.value.b = fd;
op->params[0].u.value.c = offset;
if (!msg_param_init_memparam(op->params + 1, mobj, 0, data_len, cookie,
MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
*data = va;
return TEE_SUCCESS;
}
TEE_Result tee_fs_rpc_write_final(struct tee_fs_rpc_operation *op)
{
return operation_commit(op);
}
TEE_Result tee_fs_rpc_truncate(uint32_t id, int fd, size_t len)
{
struct tee_fs_rpc_operation op = { .id = id, .num_params = 1 };
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_TRUNCATE;
op.params[0].u.value.b = fd;
op.params[0].u.value.c = len;
return operation_commit(&op);
}
TEE_Result tee_fs_rpc_remove(uint32_t id, struct tee_pobj *po)
{
TEE_Result res;
struct tee_fs_rpc_operation op = { .id = id, .num_params = 2 };
struct mobj *mobj;
void *va;
uint64_t cookie;
va = tee_fs_rpc_cache_alloc(TEE_FS_NAME_MAX, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_REMOVE;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, TEE_FS_NAME_MAX,
cookie, MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
res = tee_svc_storage_create_filename(va, TEE_FS_NAME_MAX,
po, po->temporary);
if (res != TEE_SUCCESS)
return res;
return operation_commit(&op);
}
TEE_Result tee_fs_rpc_remove_dfh(uint32_t id,
const struct tee_fs_dirfile_fileh *dfh)
{
TEE_Result res;
struct tee_fs_rpc_operation op = { .id = id, .num_params = 2 };
struct mobj *mobj;
void *va;
uint64_t cookie;
va = tee_fs_rpc_cache_alloc(TEE_FS_NAME_MAX, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_REMOVE;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, TEE_FS_NAME_MAX,
cookie, MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
res = tee_svc_storage_create_filename_dfh(va, TEE_FS_NAME_MAX, dfh);
if (res != TEE_SUCCESS)
return res;
return operation_commit(&op);
}
TEE_Result tee_fs_rpc_rename(uint32_t id, struct tee_pobj *old,
struct tee_pobj *new, bool overwrite)
{
TEE_Result res;
struct tee_fs_rpc_operation op = { .id = id, .num_params = 3 };
struct mobj *mobj;
char *va;
uint64_t cookie;
bool temp;
va = tee_fs_rpc_cache_alloc(TEE_FS_NAME_MAX * 2, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_RENAME;
op.params[0].u.value.b = overwrite;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, TEE_FS_NAME_MAX,
cookie, MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
if (new)
temp = old->temporary;
else
temp = true;
res = tee_svc_storage_create_filename(va, TEE_FS_NAME_MAX,
old, temp);
if (res != TEE_SUCCESS)
return res;
if (!msg_param_init_memparam(op.params + 2, mobj, TEE_FS_NAME_MAX,
TEE_FS_NAME_MAX, cookie,
MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
if (new) {
res = tee_svc_storage_create_filename(va + TEE_FS_NAME_MAX,
TEE_FS_NAME_MAX,
new, new->temporary);
} else {
res = tee_svc_storage_create_filename(va + TEE_FS_NAME_MAX,
TEE_FS_NAME_MAX,
old, false);
}
if (res != TEE_SUCCESS)
return res;
return operation_commit(&op);
}
TEE_Result tee_fs_rpc_opendir(uint32_t id, const TEE_UUID *uuid,
struct tee_fs_dir **d)
{
TEE_Result res;
struct tee_fs_rpc_operation op = { .id = id, .num_params = 3 };
struct mobj *mobj;
void *va;
uint64_t cookie;
struct tee_fs_dir *dir = calloc(1, sizeof(*dir));
if (!dir)
return TEE_ERROR_OUT_OF_MEMORY;
va = tee_fs_rpc_cache_alloc(TEE_FS_NAME_MAX, &mobj, &cookie);
if (!va) {
res = TEE_ERROR_OUT_OF_MEMORY;
goto err_exit;
}
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_OPENDIR;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, TEE_FS_NAME_MAX,
cookie, MSG_PARAM_MEM_DIR_IN))
return TEE_ERROR_BAD_STATE;
res = tee_svc_storage_create_dirname(va, TEE_FS_NAME_MAX, uuid);
if (res != TEE_SUCCESS)
return res;
op.params[2].attr = OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT;
res = operation_commit(&op);
if (res != TEE_SUCCESS)
goto err_exit;
dir->nw_dir = op.params[2].u.value.a;
*d = dir;
return TEE_SUCCESS;
err_exit:
free(dir);
return res;
}
TEE_Result tee_fs_rpc_closedir(uint32_t id, struct tee_fs_dir *d)
{
struct tee_fs_rpc_operation op = { .id = id, .num_params = 1 };
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_CLOSEDIR;
op.params[0].u.value.b = d->nw_dir;
free(d);
return operation_commit(&op);
}
TEE_Result tee_fs_rpc_readdir(uint32_t id, struct tee_fs_dir *d,
struct tee_fs_dirent **ent)
{
TEE_Result res;
struct tee_fs_rpc_operation op = { .id = id, .num_params = 2 };
struct mobj *mobj;
void *va;
uint64_t cookie;
const size_t max_name_len = TEE_FS_NAME_MAX + 1;
if (!d)
return TEE_ERROR_ITEM_NOT_FOUND;
va = tee_fs_rpc_cache_alloc(max_name_len, &mobj, &cookie);
if (!va)
return TEE_ERROR_OUT_OF_MEMORY;
op.params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
op.params[0].u.value.a = OPTEE_MRF_READDIR;
op.params[0].u.value.b = d->nw_dir;
if (!msg_param_init_memparam(op.params + 1, mobj, 0, max_name_len,
cookie, MSG_PARAM_MEM_DIR_OUT))
return TEE_ERROR_BAD_STATE;
res = operation_commit(&op);
if (res != TEE_SUCCESS)
return res;
d->d.oidlen = tee_hs2b(va, d->d.oid, strnlen(va, max_name_len),
sizeof(d->d.oid));
if (!d->d.oidlen)
return TEE_ERROR_OUT_OF_MEMORY;
*ent = &d->d;
return TEE_SUCCESS;
}