404 lines
12 KiB
C
404 lines
12 KiB
C
/*
|
|
ChibiOS - Copyright (C) 2006,2007,2008,2009,2010,2011,2012,2013,2014,
|
|
2015,2016,2017,2018,2019,2020,2021 Giovanni Di Sirio.
|
|
|
|
This file is part of ChibiOS.
|
|
|
|
ChibiOS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation version 3 of the License.
|
|
|
|
ChibiOS is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/**
|
|
* @file vfs/drivers/drvsfs.c
|
|
* @brief SimpleFS VFS driver code.
|
|
*
|
|
* @addtogroup VFS_DRV_SFS
|
|
* @{
|
|
*/
|
|
|
|
#include "vfs.h"
|
|
|
|
#if (VFS_CFG_ENABLE_DRV_SFS == TRUE) || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Module local definitions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Module exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Module local types. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Module local variables. */
|
|
/*===========================================================================*/
|
|
|
|
static msg_t drv_set_cwd(void *instance, const char *path);
|
|
static msg_t drv_get_cwd(void *instance, char *buf, size_t size);
|
|
static msg_t drv_open_dir(void *instance,
|
|
const char *path,
|
|
vfs_directory_node_c **vdnpp);
|
|
static msg_t drv_open_file(void *instance,
|
|
const char *path,
|
|
int flags,
|
|
vfs_file_node_c **vfnpp);
|
|
|
|
static const struct vfs_sfs_driver_vmt driver_vmt = {
|
|
.set_cwd = drv_set_cwd,
|
|
.get_cwd = drv_get_cwd,
|
|
.open_dir = drv_open_dir,
|
|
.open_file = drv_open_file
|
|
};
|
|
|
|
static void node_dir_release(void *instance);
|
|
static msg_t node_dir_first(void *instance, vfs_direntry_info_t *dip);
|
|
static msg_t node_dir_next(void *instance, vfs_direntry_info_t *dip);
|
|
|
|
static const struct vfs_sfs_dir_node_vmt dir_node_vmt = {
|
|
.release = node_dir_release,
|
|
.dir_first = node_dir_first,
|
|
.dir_next = node_dir_next
|
|
};
|
|
|
|
static void node_file_release(void *instance);
|
|
static BaseSequentialStream *node_file_get_stream(void *instance);
|
|
static ssize_t node_file_read(void *instance, uint8_t *buf, size_t n);
|
|
static ssize_t node_file_write(void *instance, const uint8_t *buf, size_t n);
|
|
static msg_t node_file_setpos(void *instance, vfs_offset_t offset);
|
|
static vfs_offset_t node_file_getpos(void *instance);
|
|
static msg_t node_file_getstat(void *instance, vfs_file_stat_t *fsp);
|
|
|
|
static const struct vfs_sfs_file_node_vmt file_node_vmt = {
|
|
.release = node_file_release,
|
|
.file_get_stream = node_file_get_stream,
|
|
.file_read = node_file_read,
|
|
.file_write = node_file_write,
|
|
.file_setpos = node_file_setpos,
|
|
.file_getpos = node_file_getpos,
|
|
.file_getstat = node_file_getstat
|
|
};
|
|
|
|
static size_t file_stream_write(void *instance, const uint8_t *bp, size_t n);
|
|
static size_t file_stream_read(void *instance, uint8_t *bp, size_t n);
|
|
static msg_t file_stream_put(void *instance, uint8_t b);
|
|
static msg_t file_stream_get(void *instance);
|
|
|
|
static const struct BaseSequentialStreamVMT file_stream_vmt = {
|
|
.instance_offset = __CH_OFFSETOF(vfs_sfs_file_node_c, stream.vmt),
|
|
.write = file_stream_write,
|
|
.read = file_stream_read,
|
|
.put = file_stream_put,
|
|
.get = file_stream_get
|
|
};
|
|
|
|
/**
|
|
* @brief Static members of @p vfs_sfs_driver_c.
|
|
*/
|
|
static struct {
|
|
/**
|
|
* @brief Pool of file system objects.
|
|
*/
|
|
memory_pool_t fs_nodes_pool;
|
|
/**
|
|
* @brief Pool of file info objects.
|
|
*/
|
|
memory_pool_t info_nodes_pool;
|
|
/**
|
|
* @brief Pool of directory nodes.
|
|
*/
|
|
memory_pool_t dir_nodes_pool;
|
|
/**
|
|
* @brief Pool of file nodes.
|
|
*/
|
|
memory_pool_t file_nodes_pool;
|
|
/**
|
|
* @brief Static storage of directory nodes.
|
|
*/
|
|
vfs_sfs_dir_node_c dir_nodes[DRV_CFG_SFS_DIR_NODES_NUM];
|
|
/**
|
|
* @brief Static storage of file nodes.
|
|
*/
|
|
vfs_sfs_file_node_c file_nodes[DRV_CFG_SFS_FILE_NODES_NUM];
|
|
} vfs_sfs_driver_static;
|
|
|
|
/*===========================================================================*/
|
|
/* Module local functions. */
|
|
/*===========================================================================*/
|
|
|
|
static msg_t drv_set_cwd(void *instance, const char *path) {
|
|
|
|
(void)instance;
|
|
|
|
if (strcmp(path, "/") != 0) {
|
|
return CH_RET_ENOENT;
|
|
}
|
|
|
|
return CH_RET_SUCCESS;
|
|
}
|
|
|
|
static msg_t drv_get_cwd(void *instance, char *buf, size_t size) {
|
|
|
|
(void)instance;
|
|
|
|
if (size < 2) {
|
|
return CH_RET_ERANGE;
|
|
}
|
|
|
|
buf[0] = '/';
|
|
buf[1] = '\0';
|
|
|
|
return CH_RET_SUCCESS;
|
|
}
|
|
|
|
static msg_t drv_open_dir(void *instance,
|
|
const char *path,
|
|
vfs_directory_node_c **vdnpp) {
|
|
msg_t err = CH_RET_SUCCESS;
|
|
|
|
do {
|
|
vfs_sfs_driver_c *drvp = (vfs_sfs_driver_c *)instance;
|
|
|
|
(void)drvp;
|
|
(void)path;
|
|
(void)vdnpp;
|
|
|
|
}
|
|
while (false);
|
|
|
|
return err;
|
|
}
|
|
|
|
static msg_t drv_open_file(void *instance,
|
|
const char *path,
|
|
int flags,
|
|
vfs_file_node_c **vfnpp) {
|
|
msg_t err = CH_RET_SUCCESS;
|
|
|
|
do {
|
|
vfs_sfs_driver_c *drvp = (vfs_sfs_driver_c *)instance;
|
|
|
|
(void)drvp;
|
|
(void)path;
|
|
(void)flags;
|
|
(void)vfnpp;
|
|
|
|
}
|
|
while (false);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void node_dir_release(void *instance) {
|
|
vfs_sfs_dir_node_c *dnp = (vfs_sfs_dir_node_c *)instance;
|
|
|
|
__referenced_object_release_impl(instance);
|
|
if (__referenced_object_getref_impl(instance) == 0U) {
|
|
|
|
chPoolFree(&vfs_sfs_driver_static.dir_nodes_pool, (void *)dnp);
|
|
}
|
|
}
|
|
|
|
static msg_t node_dir_first(void *instance, vfs_direntry_info_t *dip) {
|
|
vfs_sfs_dir_node_c *dnp = (vfs_sfs_dir_node_c *)instance;
|
|
msg_t err = CH_RET_SUCCESS;;
|
|
|
|
(void)dnp;
|
|
|
|
/* TODO rewind */
|
|
err = node_dir_next(instance, dip);
|
|
|
|
return err;
|
|
}
|
|
|
|
static msg_t node_dir_next(void *instance, vfs_direntry_info_t *dip) {
|
|
msg_t err = CH_RET_SUCCESS;
|
|
|
|
do {
|
|
vfs_sfs_dir_node_c *dnp = (vfs_sfs_dir_node_c *)instance;
|
|
|
|
(void)dnp;
|
|
(void)dip;
|
|
}
|
|
while (false);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void node_file_release(void *instance) {
|
|
vfs_sfs_file_node_c *fnp = (vfs_sfs_file_node_c *)instance;
|
|
|
|
__referenced_object_release_impl(instance);
|
|
if (__referenced_object_getref_impl(instance) == 0U) {
|
|
|
|
chPoolFree(&vfs_sfs_driver_static.file_nodes_pool, (void *)fnp);
|
|
}
|
|
}
|
|
|
|
static BaseSequentialStream *node_file_get_stream(void *instance) {
|
|
vfs_sfs_file_node_c *fnp = (vfs_sfs_file_node_c *)instance;
|
|
|
|
return &fnp->stream;
|
|
}
|
|
|
|
static ssize_t node_file_read(void *instance, uint8_t *buf, size_t n) {
|
|
vfs_sfs_file_node_c *fnp = (vfs_sfs_file_node_c *)instance;
|
|
|
|
(void)fnp;
|
|
(void)buf;
|
|
(void)n;
|
|
|
|
return (ssize_t)0;
|
|
}
|
|
|
|
static ssize_t node_file_write(void *instance, const uint8_t *buf, size_t n) {
|
|
vfs_sfs_file_node_c *fnp = (vfs_sfs_file_node_c *)instance;
|
|
|
|
(void)fnp;
|
|
(void)buf;
|
|
(void)n;
|
|
|
|
return (ssize_t)0;
|
|
}
|
|
|
|
static msg_t node_file_setpos(void *instance, vfs_offset_t offset) {
|
|
vfs_sfs_file_node_c *fnp = (vfs_sfs_file_node_c *)instance;
|
|
|
|
(void)fnp;
|
|
(void)offset;
|
|
|
|
return CH_RET_SUCCESS;
|
|
}
|
|
|
|
static vfs_offset_t node_file_getpos(void *instance) {
|
|
vfs_sfs_file_node_c *fnp = (vfs_sfs_file_node_c *)instance;
|
|
|
|
(void)fnp;
|
|
|
|
return (vfs_offset_t)0;
|
|
}
|
|
|
|
static msg_t node_file_getstat(void *instance, vfs_file_stat_t *fsp) {
|
|
|
|
(void)instance;
|
|
(void)fsp;
|
|
|
|
return CH_RET_ENOSYS;
|
|
}
|
|
|
|
static size_t file_stream_write(void *instance, const uint8_t *bp, size_t n) {
|
|
vfs_sfs_file_node_c *fnp = objGetInstance(vfs_sfs_file_node_c *,
|
|
(BaseSequentialStream *)instance);
|
|
msg_t msg;
|
|
|
|
msg = fnp->vmt->file_write((void *)fnp, bp, n);
|
|
if (CH_RET_IS_ERROR(msg)) {
|
|
|
|
return (size_t)0;
|
|
}
|
|
|
|
return (size_t)msg;
|
|
}
|
|
|
|
static size_t file_stream_read(void *instance, uint8_t *bp, size_t n) {
|
|
vfs_sfs_file_node_c *fnp = objGetInstance(vfs_sfs_file_node_c *,
|
|
(BaseSequentialStream *)instance);
|
|
msg_t msg;
|
|
|
|
msg = fnp->vmt->file_read((void *)fnp, bp, n);
|
|
if (CH_RET_IS_ERROR(msg)) {
|
|
|
|
return (size_t)0;
|
|
}
|
|
|
|
return (size_t)msg;
|
|
}
|
|
|
|
static msg_t file_stream_put(void *instance, uint8_t b) {
|
|
vfs_sfs_file_node_c *fnp = objGetInstance(vfs_sfs_file_node_c *,
|
|
(BaseSequentialStream *)instance);
|
|
msg_t msg;
|
|
|
|
msg = fnp->vmt->file_write((void *)fnp, &b, (size_t)1);
|
|
if (CH_RET_IS_ERROR(msg)) {
|
|
|
|
return STM_TIMEOUT;
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
static msg_t file_stream_get(void *instance) {
|
|
vfs_sfs_file_node_c *fnp = objGetInstance(vfs_sfs_file_node_c *,
|
|
(BaseSequentialStream *)instance);
|
|
msg_t msg;
|
|
uint8_t b;
|
|
|
|
msg = fnp->vmt->file_read((void *)fnp, &b, (size_t)1);
|
|
if (CH_RET_IS_ERROR(msg)) {
|
|
|
|
return STM_TIMEOUT;
|
|
}
|
|
|
|
return (msg_t)b;
|
|
}
|
|
|
|
/*===========================================================================*/
|
|
/* Module exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Module initialization.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void __drv_sfs_init(void) {
|
|
|
|
/* Initializing pools.*/
|
|
chPoolObjectInit(&vfs_sfs_driver_static.dir_nodes_pool,
|
|
sizeof (vfs_sfs_dir_node_c),
|
|
chCoreAllocAlignedI);
|
|
chPoolObjectInit(&vfs_sfs_driver_static.file_nodes_pool,
|
|
sizeof (vfs_sfs_file_node_c),
|
|
chCoreAllocAlignedI);
|
|
|
|
/* Preloading pools.*/
|
|
chPoolLoadArray(&vfs_sfs_driver_static.dir_nodes_pool,
|
|
&vfs_sfs_driver_static.dir_nodes[0],
|
|
DRV_CFG_SFS_DIR_NODES_NUM);
|
|
chPoolLoadArray(&vfs_sfs_driver_static.file_nodes_pool,
|
|
&vfs_sfs_driver_static.file_nodes[0],
|
|
DRV_CFG_SFS_FILE_NODES_NUM);
|
|
}
|
|
|
|
/**
|
|
* @brief VFS SimpleFS object initialization.
|
|
*
|
|
* @param[out] drvp pointer to a @p vfs_sfs_driver_c structure
|
|
* @param[in] rootname name to be attributed to this object
|
|
* @return A pointer to this initialized object.
|
|
*
|
|
* @api
|
|
*/
|
|
vfs_driver_c *drvSFSObjectInit(vfs_sfs_driver_c *drvp) {
|
|
|
|
__base_object_objinit_impl(drvp, &driver_vmt);
|
|
|
|
return (vfs_driver_c *)drvp;
|
|
}
|
|
|
|
#endif /* VFS_CFG_ENABLE_DRV_SFS == TRUE */
|
|
|
|
/** @} */
|