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client_tipc.c
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client_tipc.c
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/*
* Copyright (C) 2013-2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "client_tipc.h"
#include <assert.h>
#include <errno.h>
#include <uapi/err.h>
#include <lk/list.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <trusty_std.h>
#include <openssl/mem.h>
#include <interface/storage/storage.h>
#include "client_session_tipc.h"
#include "file.h"
#include "ipc.h"
#include "session.h"
#include "tipc_limits.h"
#include "att_keybox.h"
#include "rpmb.h"
#include "trusty_key_crypt.h"
/* macros to help manage debug output */
#define SS_ERR(args...) fprintf(stderr, "ss: " args)
#define SS_DBG_IO(args...) do {} while(0)
#if 0
/* this can generate alot of spew on debug builds */
#define SS_INFO(args...) fprintf(stderr, "ss: " args)
#else
#define SS_INFO(args...) do {} while(0)
#endif
#define RPMB_BLOCK_SIZE 256
#define ATTKB_PRESENCE (1 << 0)
#define ATTKB_MAX_SIZE (16 * 1024)
#ifndef RETRIEVE_ATTKB_FROM_RAW_RPMB
#define RPMB_BLOCK_INFO_INDEX 1
#endif
static int client_handle_msg(struct ipc_channel_context *ctx, void *msg, size_t msg_size);
static void client_disconnect(struct ipc_channel_context *context);
static int send_response(struct storage_client_session *session,
enum storage_err result, struct storage_msg *msg,
void *out, size_t out_size);
/*
* Legal secure storage directory and file names contain only
* characters from the following set: [a-z][A-Z][0-9][.-_]
*
* It is not null terminated.
*/
static int is_valid_name(const char *name, size_t name_len)
{
size_t i;
if (!name_len)
return 0;
for (i = 0; i < name_len; i++) {
if ((name[i] >= 'a') && (name[i] <= 'z'))
continue;
if ((name[i] >= 'A') && (name[i] <= 'Z'))
continue;
if ((name[i] >= '0') && (name[i] <= '9'))
continue;
if ((name[i] == '.') || (name[i] == '-') || (name[i] == '_'))
continue;
/* not a legal character so reject this name */
return 0;
}
return 1;
}
static int get_path(char *path_out, size_t path_out_size,
const uuid_t *uuid,
const char *file_name, size_t file_name_len)
{
unsigned int rc;
rc = snprintf(path_out, path_out_size,
"%08x%04x%04x%02x%02x%02x%02x%02x%02x%02x%02x/",
uuid->time_low,
uuid->time_mid,
uuid->time_hi_and_version,
uuid->clock_seq_and_node[0],
uuid->clock_seq_and_node[1],
uuid->clock_seq_and_node[2],
uuid->clock_seq_and_node[3],
uuid->clock_seq_and_node[4],
uuid->clock_seq_and_node[5],
uuid->clock_seq_and_node[6],
uuid->clock_seq_and_node[7]);
if (rc + file_name_len >= path_out_size) {
return STORAGE_ERR_NOT_VALID;
}
memcpy(path_out + rc, file_name, file_name_len);
path_out[rc + file_name_len] = '\0';
return STORAGE_NO_ERROR;
}
static enum storage_err session_set_files_count(struct storage_client_session *session,
size_t files_count)
{
struct file_handle **files;
if (files_count > STORAGE_MAX_OPEN_FILES) {
SS_ERR("%s: too many open files\n", __func__);
return STORAGE_ERR_NOT_VALID;
}
files = realloc(session->files, sizeof(files[0]) * files_count);
if (!files) {
SS_ERR("%s: out of memory\n", __func__);
return STORAGE_ERR_GENERIC;
}
if (files_count > session->files_count)
memset(files + session->files_count, 0,
sizeof(files[0]) * (files_count - session->files_count));
session->files = files;
session->files_count = files_count;
SS_INFO("%s: new file table size, 0x%x\n", __func__, files_count);
return STORAGE_NO_ERROR;
}
static void session_shrink_files(struct storage_client_session *session)
{
uint32_t handle;
handle = session->files_count;
while (handle > 0 && !session->files[handle - 1])
handle--;
if (handle < session->files_count)
session_set_files_count(session, handle);
}
static void session_close_all_files(struct storage_client_session *session)
{
uint32_t f_handle;
struct file_handle *file;
for (f_handle = 0; f_handle < session->files_count; f_handle++) {
file = session->files[f_handle];
if (file) {
file_close(file);
free(file);
}
}
if (session->files) {
free(session->files);
}
session->files_count = 0;
}
static enum storage_err create_file_handle(struct storage_client_session *session,
uint32_t *handlep,
struct file_handle **file_p)
{
enum storage_err result;
uint32_t handle;
struct file_handle *file;
for (handle = 0; handle < session->files_count; handle++)
if (!session->files[handle])
break;
if (handle >= session->files_count) {
result = session_set_files_count(session, handle + 1);
if (result != STORAGE_NO_ERROR)
return result;
}
file = calloc(1, sizeof(*file));
if (!file) {
SS_ERR("%s: out of memory\n", __func__);
return STORAGE_ERR_GENERIC;
}
session->files[handle] = file;
SS_INFO("%s: created file handle 0x%x\n", __func__, handle);
*handlep = handle;
*file_p = file;
return STORAGE_NO_ERROR;
}
static void free_file_handle(struct storage_client_session *session, uint32_t handle)
{
if (handle >= session->files_count) {
SS_ERR("%s: invalid handle, 0x%x\n", __func__, handle);
return;
}
if (session->files[handle] == NULL) {
SS_ERR("%s: closed handle, 0x%x\n", __func__, handle);
return;
}
free(session->files[handle]);
session->files[handle] = NULL;
SS_INFO("%s: deleted file handle 0x%x\n", __func__, handle);
session_shrink_files(session);
}
static struct file_handle *get_file_handle(struct storage_client_session *session,
uint32_t handle)
{
struct file_handle *file;
if (handle >= session->files_count) {
SS_ERR("%s: invalid handle, 0x%x\n", __func__, handle);
return NULL;
}
file = session->files[handle];
if (!file) {
SS_ERR("%s: closed handle, 0x%x\n", __func__, handle);
return NULL;
}
return file;
}
static enum storage_err storage_file_delete(struct storage_msg *msg,
struct storage_file_delete_req *req, size_t req_size,
struct storage_client_session *session)
{
bool deleted;
enum storage_err result;
const char *fname;
size_t fname_len;
uint32_t flags;
char path_buf[FS_PATH_MAX];
if (req_size < sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
return STORAGE_ERR_NOT_VALID;
}
flags = req->flags;
if ((flags & ~STORAGE_FILE_DELETE_MASK) != 0) {
SS_ERR("invalid delete flags 0x%x\n", flags);
return STORAGE_ERR_NOT_VALID;
}
/* make sure filename is legal */
fname = req->name;
fname_len = req_size - sizeof(*req);
if (!is_valid_name(fname, fname_len)) {
SS_ERR("%s: invalid filename\n", __func__);
return STORAGE_ERR_NOT_VALID;
}
result = get_path(path_buf, sizeof(path_buf), &session->uuid, fname, fname_len);
if (result != STORAGE_NO_ERROR) {
return result;
}
SS_INFO("%s: path %s\n", __func__, path_buf);
deleted = file_delete(&session->tr, path_buf);
if (session->tr.failed) {
SS_ERR("%s: transaction failed\n", __func__);
return STORAGE_ERR_GENERIC;
} else if (!deleted) {
return STORAGE_ERR_NOT_FOUND;
}
if (msg->flags & STORAGE_MSG_FLAG_TRANSACT_COMPLETE) {
transaction_complete(&session->tr);
if (session->tr.failed) {
SS_ERR("%s: transaction commit failed\n", __func__);
return STORAGE_ERR_GENERIC;
}
return STORAGE_NO_ERROR;
}
return STORAGE_NO_ERROR;
}
/**
* storage_file_check_name - Check if file handle matches path
* @tr: Transaction object.
* @file: File handle object.
* @path: Path to check.
*
* Return: %true if @file matches @path, %false otherwise.
*/
static bool storage_file_check_name(struct transaction *tr,
const struct file_handle *file,
const char *path)
{
bool ret;
const struct file_info *file_info;
obj_ref_t ref = OBJ_REF_INITIAL_VALUE(ref);
file_info = file_get_info(tr, &file->block_mac, &ref);
if (!file_info) {
printf("can't read file entry at %lld\n",
block_mac_to_block(tr, &file->block_mac));
return false;
}
assert(file_info);
ret = strcmp(file_info->path, path) == 0;
file_info_put(file_info, &ref);
return ret;
}
static enum storage_err storage_file_move(struct storage_msg *msg,
struct storage_file_move_req *req, size_t req_size,
struct storage_client_session *session)
{
bool moved;
bool found;
enum storage_err result;
const char *old_name;
const char *new_name;
size_t fname_len;
size_t old_len;
size_t new_len;
uint32_t flags;
struct file_handle *file = NULL;
char path_buf[FS_PATH_MAX];
enum file_create_mode file_create_mode;
struct file_handle tmp_file;
if (req_size < sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
return STORAGE_ERR_NOT_VALID;
}
flags = req->flags;
if ((flags & ~STORAGE_FILE_MOVE_MASK) != 0) {
SS_ERR("invalid move flags 0x%x\n", flags);
return STORAGE_ERR_NOT_VALID;
}
if (flags & STORAGE_FILE_MOVE_CREATE) {
if (flags & STORAGE_FILE_MOVE_CREATE_EXCLUSIVE) {
file_create_mode = FILE_OPEN_CREATE_EXCLUSIVE;
} else {
file_create_mode = FILE_OPEN_CREATE;
}
} else {
file_create_mode = FILE_OPEN_NO_CREATE;
}
/* make sure filename is legal */
old_name = req->old_new_name;
fname_len = req_size - sizeof(*req);
if (!is_valid_name(old_name, fname_len)) {
SS_ERR("%s: invalid filename\n", __func__);
return STORAGE_ERR_NOT_VALID;
}
old_len = req->old_name_len;
if (old_len >= fname_len) {
SS_ERR("%s: invalid old filename length (%zd) >= (%zd)\n",
__func__, old_len, fname_len);
return STORAGE_ERR_NOT_VALID;
}
new_len = fname_len - old_len;
new_name = old_name + old_len;
if (flags & STORAGE_FILE_MOVE_OPEN_FILE) {
file = get_file_handle(session, req->handle);
if (!file)
return STORAGE_ERR_NOT_VALID;
}
result = get_path(path_buf, sizeof(path_buf), &session->uuid,
old_name, old_len);
if (result != STORAGE_NO_ERROR) {
return result;
}
SS_INFO("%s: old path %s\n", __func__, path_buf);
if (file) {
if (!storage_file_check_name(&session->tr, file, path_buf)) {
return STORAGE_ERR_NOT_VALID;
}
} else {
found = file_open(&session->tr, path_buf,
&tmp_file, FILE_OPEN_NO_CREATE);
if (!found) {
return STORAGE_ERR_NOT_FOUND;
}
file = &tmp_file;
}
result = get_path(path_buf, sizeof(path_buf), &session->uuid,
new_name, new_len);
if (result != STORAGE_NO_ERROR) {
if (file == &tmp_file) {
file_close(&tmp_file);
}
return result;
}
SS_INFO("%s: new path %s\n", __func__, path_buf);
moved = file_move(&session->tr, file, path_buf, file_create_mode);
if (file == &tmp_file) {
file_close(&tmp_file);
}
if (session->tr.failed) {
SS_ERR("%s: transaction failed\n", __func__);
return STORAGE_ERR_GENERIC;
} else if (!moved) {
return (flags & STORAGE_FILE_MOVE_CREATE) ?
STORAGE_ERR_EXIST : STORAGE_ERR_NOT_FOUND;
}
if (msg->flags & STORAGE_MSG_FLAG_TRANSACT_COMPLETE) {
transaction_complete(&session->tr);
if (session->tr.failed) {
SS_ERR("%s: transaction commit failed\n", __func__);
return STORAGE_ERR_GENERIC;
}
return STORAGE_NO_ERROR;
}
return STORAGE_NO_ERROR;
}
static int storage_file_open(struct storage_msg *msg,
struct storage_file_open_req *req, size_t req_size,
struct storage_client_session *session)
{
bool found;
enum storage_err result;
struct file_handle *file = NULL;
const char *fname;
size_t fname_len;
uint32_t flags, f_handle;
char path_buf[FS_PATH_MAX];
void *out = NULL;
size_t out_size = 0;
enum file_create_mode file_create_mode;
if (req_size < sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_size;
}
flags = req->flags;
if ((flags & ~STORAGE_FILE_OPEN_MASK) != 0) {
SS_ERR("%s: invalid flags 0x%x\n", __func__, flags);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_mask;
}
/* make sure filename is legal */
fname = req->name;
fname_len = req_size - sizeof(*req);
if (!is_valid_name(fname, fname_len)) {
SS_ERR("%s: invalid filename\n", __func__);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_name;
}
result = get_path(path_buf, sizeof(path_buf), &session->uuid, fname, fname_len);
if (result != STORAGE_NO_ERROR) {
goto err_get_path;
}
SS_INFO("%s: path %s flags 0x%x\n", __func__, path_buf, flags);
SS_INFO("%s: call create_file_handle\n", __func__);
/* alloc file info struct */
result = create_file_handle(session, &f_handle, &file);
if (result != STORAGE_NO_ERROR)
goto err_create_file_handle;
if (flags & STORAGE_FILE_OPEN_CREATE) {
if (flags & STORAGE_FILE_OPEN_CREATE_EXCLUSIVE) {
file_create_mode = FILE_OPEN_CREATE_EXCLUSIVE;
} else {
file_create_mode = FILE_OPEN_CREATE;
}
} else {
file_create_mode = FILE_OPEN_NO_CREATE;
}
found = file_open(&session->tr, path_buf, file, file_create_mode);
if (!found) {
/* TODO: get more accurate error code from file_open */
if (session->tr.failed) {
result = STORAGE_ERR_GENERIC;
} else if (flags & STORAGE_FILE_OPEN_CREATE) {
result = STORAGE_ERR_EXIST;
} else {
result = STORAGE_ERR_NOT_FOUND;
}
goto err_open_file;
}
if ((flags & STORAGE_FILE_OPEN_TRUNCATE) && file->size) {
file_set_size(&session->tr, file, 0);
}
if (session->tr.failed) {
SS_ERR("%s: transaction failed\n", __func__);
result = STORAGE_ERR_GENERIC;
goto err_transaction_failed;
}
if (msg->flags & STORAGE_MSG_FLAG_TRANSACT_COMPLETE) {
transaction_complete(&session->tr);
if (session->tr.failed) {
SS_ERR("%s: transaction commit failed\n", __func__);
result = STORAGE_ERR_GENERIC;
goto err_transaction_failed;
}
}
struct storage_file_open_resp resp = { .handle = f_handle };
out = &resp;
out_size = sizeof(resp);
result = STORAGE_NO_ERROR;
goto done;
err_transaction_failed:
file_close(file);
err_open_file:
free_file_handle(session, f_handle);
err_create_file_handle:
err_get_path:
err_invalid_name:
err_invalid_mask:
err_invalid_size:
done:
return send_response(session, result, msg, out, out_size);
}
static enum storage_err storage_file_close(struct storage_msg *msg,
struct storage_file_close_req *req, size_t req_size,
struct storage_client_session *session)
{
struct file_handle *file;
if (req_size < sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
return STORAGE_ERR_NOT_VALID;
}
file = get_file_handle(session, req->handle);
if (!file)
return STORAGE_ERR_NOT_VALID;
file_close(file);
free_file_handle(session, req->handle);
if (msg->flags & STORAGE_MSG_FLAG_TRANSACT_COMPLETE) {
transaction_complete(&session->tr);
if (session->tr.failed) {
SS_ERR("%s: transaction commit failed\n", __func__);
return STORAGE_ERR_GENERIC;
}
return STORAGE_NO_ERROR;
}
return STORAGE_NO_ERROR;
}
static int storage_file_read(struct storage_msg *msg,
struct storage_file_read_req *req, size_t req_size,
struct storage_client_session *session)
{
enum storage_err result = STORAGE_NO_ERROR;
void *bufp = NULL;
size_t buflen;
size_t bytes_left, len;
uint64_t offset;
struct file_handle *file;
void *out = NULL;
size_t out_size = 0;
size_t block_size = get_file_block_size(session->tr.fs);
data_block_t block_num;
const uint8_t *block_data;
obj_ref_t block_data_ref = OBJ_REF_INITIAL_VALUE(block_data_ref);
size_t block_offset;
if (req_size < sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_input;
}
file = get_file_handle(session, req->handle);
if (!file) {
SS_ERR("%s: invalid file handle (%d)\n", __func__, req->handle);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_input;
}
buflen = req->size;
if (buflen > STORAGE_MAX_BUFFER_SIZE - sizeof(*msg)) {
SS_ERR("can't read more than %d bytes, requested %zd\n",
STORAGE_MAX_BUFFER_SIZE, buflen);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_input;
}
offset = req->offset;
if (offset > file->size) {
SS_ERR("can't read past end of file (%lld > %lld)\n",
offset, file->size);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_input;
}
// reuse the input buffer
bufp = (uint8_t *)(msg + 1);
/* calc number of bytes to read */
if ((offset + buflen) > file->size) {
bytes_left = (size_t)(file->size - offset);
} else {
bytes_left = buflen;
}
buflen = bytes_left; /* save to return it to caller */
SS_INFO("%s: start 0x%x cnt %d\n", __func__, offset, bytes_left);
result = STORAGE_NO_ERROR;
while (bytes_left) {
block_num = offset / block_size;
block_data = file_get_block(&session->tr, file, block_num,
&block_data_ref);
block_offset = offset % block_size;
len = (block_offset + bytes_left > block_size) ?
block_size - block_offset : bytes_left;
if (!block_data) {
if (session->tr.failed) {
SS_ERR("error reading block %lld\n", block_num);
result = STORAGE_ERR_GENERIC;
goto err_get_block;
}
memset(bufp, 0, len);
} else {
memcpy(bufp, block_data + block_offset, len);
file_block_put(block_data, &block_data_ref);
}
bytes_left -= len;
offset += len;
bufp += len;
}
out = (uint8_t *)(msg + 1);
out_size = buflen;
err_get_block:
err_invalid_input:
return send_response(session, result, msg, out, out_size);
}
static enum storage_err storage_create_gap(struct storage_client_session *session,
struct file_handle *file)
{
size_t block_size = get_file_block_size(session->tr.fs);
data_block_t block_num;
size_t block_offset;
uint8_t *block_data;
obj_ref_t block_data_ref = OBJ_REF_INITIAL_VALUE(block_data_ref);
block_num = file->size / block_size;
block_offset = file->size % block_size;
if (block_offset) {
/*
* The file does not currently end on a block boundary.
* We don't clear data in partial blocks when truncating
* a file, so the last block could contain data that
* should not be readable. We unconditionally clear the
* exposed data when creating gaps in the file, as we
* don't know if that data is already clear.
*/
block_data = file_get_block_write(&session->tr, file, block_num,
true, &block_data_ref);
if (!block_data) {
SS_ERR("error getting block %lld\n", block_num);
return STORAGE_ERR_GENERIC;
}
memset(block_data + block_offset, 0, block_size - block_offset);
file_block_put_dirty(&session->tr, file, block_num,
block_data, &block_data_ref);
SS_INFO("%s: clear block at old size 0x%llx, block_offset 0x%zx\n",
__func__, file->size, block_offset);
}
return STORAGE_NO_ERROR;
}
static enum storage_err storage_file_write(struct storage_msg *msg,
struct storage_file_write_req *req, size_t req_size,
struct storage_client_session *session)
{
enum storage_err result = STORAGE_NO_ERROR;
const void *bufp = NULL;
size_t buflen;
uint64_t offset, end_offset, bytes_left;
size_t len;
struct file_handle *file;
size_t block_size = get_file_block_size(session->tr.fs);
data_block_t block_num;
uint8_t *block_data;
obj_ref_t block_data_ref = OBJ_REF_INITIAL_VALUE(block_data_ref);
size_t block_offset;
if (req_size <= sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
return STORAGE_ERR_NOT_VALID;
}
file = get_file_handle(session, req->handle);
if (!file) {
SS_ERR("%s: invalid file handle (%d)\n", __func__, req->handle);
return STORAGE_ERR_NOT_VALID;
}
offset = req->offset;
if (offset > file->size) {
result = storage_create_gap(session, file);
if (result != STORAGE_NO_ERROR) {
goto err_write;
}
}
bufp = req->data;
buflen = req_size - sizeof(*req);
end_offset = offset + buflen - 1;
bytes_left = end_offset - offset + 1;
/* transfer data one ss block at a time */
while (bytes_left) {
block_num = offset / block_size;
block_offset = offset % block_size;
len = (block_offset + bytes_left > block_size) ?
block_size - block_offset : bytes_left;
block_data = file_get_block_write(&session->tr, file, block_num,
len != block_size, &block_data_ref);
if (!block_data) {
SS_ERR("error getting block %lld\n", block_num);
result = STORAGE_ERR_GENERIC;
goto err_write;
}
memcpy(block_data + block_offset, bufp, len);
file_block_put_dirty(&session->tr, file, block_num,
block_data, &block_data_ref);
SS_INFO("%s: bufp %p offset 0x%llx len 0x%x\n",
__func__, bufp, offset, len);
bytes_left -= len;
offset += len;
bufp += len;
}
if (offset > file->size) {
file_set_size(&session->tr, file, offset);
}
if (session->tr.failed) {
SS_ERR("%s: transaction failed\n", __func__);
return STORAGE_ERR_GENERIC;
}
if (msg->flags & STORAGE_MSG_FLAG_TRANSACT_COMPLETE) {
transaction_complete(&session->tr);
if (session->tr.failed) {
SS_ERR("%s: transaction commit failed\n", __func__);
return STORAGE_ERR_GENERIC;
}
}
return STORAGE_NO_ERROR;
err_write:
if (!session->tr.failed) {
transaction_fail(&session->tr);
}
err_transaction_complete:
return result;
}
struct storage_file_list_state {
struct file_iterate_state iter;
char prefix[34];
size_t prefix_len;
uint8_t buf[1024];
size_t buf_used;
uint8_t max_count;
uint8_t count;
};
static bool storage_file_list_buf_full(struct storage_file_list_state *miter)
{
size_t max_item_size = FS_PATH_MAX - miter->prefix_len + 2;
if (miter->max_count && miter->count >= miter->max_count) {
return true;
}
return miter->buf_used + max_item_size > sizeof(miter->buf);
}
static void storage_file_list_add(struct storage_file_list_state *miter,
uint8_t flags, const char *path)
{
struct storage_file_list_resp *resp;
assert(!storage_file_list_buf_full(miter));
resp = (void *)(miter->buf + miter->buf_used);
resp->flags = flags;
miter->buf_used++;
miter->count++;
if (path) {
strcpy(resp->name, path);
miter->buf_used += strlen(path) + 1;
}
}
static bool storage_file_list_iter(struct file_iterate_state *iter,
struct transaction *tr,
const struct block_mac *block_mac,
bool added, bool removed)
{
struct storage_file_list_state *miter =
containerof(iter, struct storage_file_list_state, iter);
const struct file_info *file_info;
obj_ref_t ref = OBJ_REF_INITIAL_VALUE(ref);
file_info = file_get_info(tr, block_mac, &ref);
if (strncmp(file_info->path, miter->prefix, miter->prefix_len) == 0) {
storage_file_list_add(miter,
added ? STORAGE_FILE_LIST_ADDED :
removed ? STORAGE_FILE_LIST_REMOVED :
STORAGE_FILE_LIST_COMMITTED,
file_info->path + miter->prefix_len);
}
file_info_put(file_info, &ref);
return storage_file_list_buf_full(miter);
}
static int storage_file_list(struct storage_msg *msg,
struct storage_file_list_req *req, size_t req_size,
struct storage_client_session *session)
{
enum storage_err result = STORAGE_NO_ERROR;
void *out = NULL;
size_t out_size = 0;
bool ret;
const char *last_name;
char path_buf[FS_PATH_MAX];
uint8_t last_state;
const char *fname;
size_t fname_len;
struct storage_file_list_state state = {
.iter.file = storage_file_list_iter,
.buf_used = 0,
};
if (req_size < sizeof(*req)) {
SS_ERR("%s: invalid request size (%zd)\n", __func__, req_size);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_input;
}
result = get_path(state.prefix, sizeof(state.prefix), &session->uuid, "", 0);
if (result != STORAGE_NO_ERROR) {
SS_ERR("%s: internal error, get_path failed\n", __func__);
result = STORAGE_ERR_GENERIC;
goto err_get_path_prefix;
}
state.prefix_len = strlen(state.prefix);
last_state = req->flags & STORAGE_FILE_LIST_STATE_MASK;
if (last_state == STORAGE_FILE_LIST_END) {
SS_ERR("%s: invalid request state (%d)\n", __func__, last_state);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_state;
}
if (last_state == STORAGE_FILE_LIST_START) {
last_name = NULL;
} else {
/* make sure filename is legal */
fname = req->name;
fname_len = req_size - sizeof(*req);
if (!is_valid_name(fname, fname_len)) {
SS_ERR("%s: invalid filename\n", __func__);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_filename;
}
result = get_path(path_buf, sizeof(path_buf), &session->uuid, fname, fname_len);
if (result != STORAGE_NO_ERROR) {
goto err_invalid_filename;
}
last_name = path_buf;
}
if (last_state != STORAGE_FILE_LIST_ADDED) {
ret = file_iterate(&session->tr, last_name, false, &state.iter);
last_name = NULL;
} else {
ret = true;
}
if (ret && !storage_file_list_buf_full(&state)) {
ret = file_iterate(&session->tr, last_name, true, &state.iter);
}
if (!ret) {
SS_ERR("%s: file_iterate failed\n", __func__);
result = STORAGE_ERR_GENERIC;
goto err_file_iterate;
}
if (!storage_file_list_buf_full(&state)) {
storage_file_list_add(&state, STORAGE_FILE_LIST_END, NULL);
}
out = state.buf;
out_size = state.buf_used;
err_file_iterate:
err_invalid_filename:
err_invalid_state:
err_get_path_prefix:
err_invalid_input:
return send_response(session, result, msg, out, out_size);
}
static int storage_file_get_size(struct storage_msg *msg,
struct storage_file_get_size_req *req, size_t req_size,
struct storage_client_session *session)
{
bool valid;
struct file_handle *file;
enum storage_err result = STORAGE_NO_ERROR;
void *out = NULL;
size_t out_size = 0;
if (req_size != sizeof(*req)) {
SS_ERR("%s: inavlid request size (%zd)\n", __func__, req_size);
result = STORAGE_ERR_NOT_VALID;
goto err_invalid_input;
}
file = get_file_handle(session, req->handle);
if (!file) {
SS_ERR("%s: invalid file handle (%d)\n", __func__, req->handle);
result = STORAGE_ERR_NOT_VALID;