459 lines
14 KiB
C
459 lines
14 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
|
||
|
|
* Copyright (c) 2020-2021 Huawei Device Co., Ltd. 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.
|
||
|
|
*
|
||
|
|
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
|
||
|
|
* to endorse or promote products derived from this software without specific prior written
|
||
|
|
* permission.
|
||
|
|
*
|
||
|
|
* 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 "vfs_zpfs.h"
|
||
|
|
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <sys/statfs.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#include "fs/dirent_fs.h"
|
||
|
|
#include "inode/inode.h"
|
||
|
|
#include "internal.h"
|
||
|
|
#include "los_tables.h"
|
||
|
|
#include "los_vm_filemap.h"
|
||
|
|
|
||
|
|
#ifdef LOSCFG_FS_ZPFS
|
||
|
|
|
||
|
|
static int CheckEntryExist(const struct ZpfsEntry *zpfsEntry, char **fPath, struct stat *buf)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct inode *inode = zpfsEntry->mountedInode;
|
||
|
|
const char *path = zpfsEntry->mountedPath;
|
||
|
|
const char *relPath = zpfsEntry->mountedRelpath;
|
||
|
|
int len = strlen(path) + strlen(relPath) + 1;
|
||
|
|
int fullLen = len + 1;
|
||
|
|
char *fullPath = (char *)malloc(fullLen);
|
||
|
|
if (fullPath == NULL) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = snprintf_s(fullPath, fullLen, len, "%s/%s", path, relPath);
|
||
|
|
if (ret < 0) {
|
||
|
|
free(fullPath);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (inode->u.i_mops->stat != NULL) {
|
||
|
|
ret = inode->u.i_mops->stat(inode, fullPath, buf);
|
||
|
|
} else {
|
||
|
|
ret = -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fPath == NULL) {
|
||
|
|
free(fullPath);
|
||
|
|
} else {
|
||
|
|
*fPath = fullPath;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct inode *GetRelInodeFromVInode(const ZpfsConfig *zpfsCfg,
|
||
|
|
const char* relPath, struct stat *buf, char **finalPath)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct ZpfsEntry entry;
|
||
|
|
|
||
|
|
for (int i = 0; i < zpfsCfg->entryCount; i++) {
|
||
|
|
entry.mountedPath = zpfsCfg->orgEntry[i].mountedRelpath;
|
||
|
|
entry.mountedRelpath = (char*)relPath;
|
||
|
|
entry.mountedInode = zpfsCfg->orgEntry[i].mountedInode;
|
||
|
|
ret = CheckEntryExist(&entry, finalPath, buf);
|
||
|
|
if (ret == OK) {
|
||
|
|
return entry.mountedInode;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: VfsZpfsRealInode
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Get the inode which is hidden.
|
||
|
|
*
|
||
|
|
* Input Parameters:
|
||
|
|
* The relative path.
|
||
|
|
* Returned Value:
|
||
|
|
* finalPath the relative path of the mount point.
|
||
|
|
* OK
|
||
|
|
* NULL memory is not enough.
|
||
|
|
****************************************************************************/
|
||
|
|
static inline struct inode *VfsZpfsRealInode(const ZpfsConfig *zpfsCfg, const char *relPath, char **finalPath)
|
||
|
|
{
|
||
|
|
struct stat buf;
|
||
|
|
struct inode *inode = GetRelInodeFromVInode(zpfsCfg, relPath, &buf, finalPath);
|
||
|
|
return inode;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsOpen(struct file *file, const char *relPath, int oflAgs, mode_t mode)
|
||
|
|
{
|
||
|
|
char *finalPath = NULL;
|
||
|
|
struct inode *swapInode = NULL;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
struct inode *inode = file->f_inode;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(inode);
|
||
|
|
inode = VfsZpfsRealInode(zpfsCfg, relPath, &finalPath);
|
||
|
|
if ((inode == NULL) || (!inode->u.i_mops->open)) {
|
||
|
|
if (finalPath) {
|
||
|
|
free(finalPath);
|
||
|
|
}
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
|
||
|
|
swapInode = file->f_inode;
|
||
|
|
file->f_inode = inode;
|
||
|
|
ret = inode->u.i_mops->open(file, finalPath, oflAgs, mode);
|
||
|
|
free(finalPath);
|
||
|
|
finalPath = NULL;
|
||
|
|
file->f_inode = swapInode;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsClose(struct file *file)
|
||
|
|
{
|
||
|
|
struct inode *swapInode = NULL;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
struct inode *inode = file->f_inode;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(inode);
|
||
|
|
inode = VfsZpfsRealInode(zpfsCfg, file->f_relpath, NULL);
|
||
|
|
if ((inode == NULL) || (!inode->u.i_mops->close)) {
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
swapInode = file->f_inode;
|
||
|
|
file->f_inode = inode;
|
||
|
|
ret = inode->u.i_mops->close(file);
|
||
|
|
file->f_inode = swapInode;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t VfsZpfsRead(struct file *file, FAR char *buffer, size_t bufLen)
|
||
|
|
{
|
||
|
|
struct inode *swapInode = NULL;
|
||
|
|
ssize_t sret;
|
||
|
|
|
||
|
|
struct inode *inode = file->f_inode;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(inode);
|
||
|
|
inode = VfsZpfsRealInode(zpfsCfg, file->f_relpath, NULL);
|
||
|
|
if ((inode == NULL) || (!inode->u.i_mops->read)) {
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
swapInode = file->f_inode;
|
||
|
|
file->f_inode = inode;
|
||
|
|
sret = inode->u.i_mops->read(file, buffer, bufLen);
|
||
|
|
file->f_inode = swapInode;
|
||
|
|
|
||
|
|
return sret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static off_t VfsZpfsLseek(struct file *file, off_t offset, int whence)
|
||
|
|
{
|
||
|
|
off_t off;
|
||
|
|
struct inode *swapInode = NULL;
|
||
|
|
|
||
|
|
struct inode *inode = file->f_inode;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(inode);
|
||
|
|
inode = VfsZpfsRealInode(zpfsCfg, file->f_relpath, NULL);
|
||
|
|
if ((inode == NULL) || (!inode->u.i_mops->seek)) {
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
swapInode = file->f_inode;
|
||
|
|
file->f_inode = inode;
|
||
|
|
off = inode->u.i_mops->seek(file, offset, whence);
|
||
|
|
file->f_inode = swapInode;
|
||
|
|
return off;
|
||
|
|
}
|
||
|
|
|
||
|
|
static loff_t VfsZpfsLseek64(struct file *file, loff_t offset, int whence)
|
||
|
|
{
|
||
|
|
loff_t off;
|
||
|
|
struct inode *swapInode = NULL;
|
||
|
|
|
||
|
|
struct inode *inode = file->f_inode;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(inode);
|
||
|
|
inode = VfsZpfsRealInode(zpfsCfg, file->f_relpath, NULL);
|
||
|
|
if ((inode == NULL) || (!inode->u.i_mops->seek64)) {
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
swapInode = file->f_inode;
|
||
|
|
file->f_inode = inode;
|
||
|
|
off = inode->u.i_mops->seek64(file, offset, whence);
|
||
|
|
file->f_inode = swapInode;
|
||
|
|
return off;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsDup(const struct file *oldFile, struct file *newFile)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct inode *inode = oldFile->f_inode;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(inode);
|
||
|
|
inode = VfsZpfsRealInode(zpfsCfg, oldFile->f_relpath, NULL);
|
||
|
|
if ((inode == NULL) || (!inode->u.i_mops->dup)) {
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = inode->u.i_mops->dup(oldFile, newFile);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsOpenDir(struct inode *mountpt, const char *relPath, struct fs_dirent_s *dir)
|
||
|
|
{
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(mountpt);
|
||
|
|
if (!VfsZpfsRealInode(zpfsCfg, relPath, NULL)) {
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
struct ZpfsDir *zpfsDir = malloc(sizeof(struct ZpfsDir));
|
||
|
|
if (zpfsDir == NULL) {
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
zpfsDir->relPath = strdup(relPath);
|
||
|
|
if (zpfsDir->relPath == NULL) {
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
zpfsDir->index = zpfsCfg->entryCount;
|
||
|
|
zpfsDir->openEntry = -1;
|
||
|
|
dir->u.zpfs = (void*)zpfsDir;
|
||
|
|
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void CloseEntry(const struct ZpfsConfig *zpfsCfg, struct fs_dirent_s *dir, const int index)
|
||
|
|
{
|
||
|
|
struct inode *inode = zpfsCfg->orgEntry[index].mountedInode;
|
||
|
|
if (inode->u.i_mops->closedir != NULL) {
|
||
|
|
inode->u.i_mops->closedir(inode, dir);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsCloseDir(struct inode *mountpt, struct fs_dirent_s *dir)
|
||
|
|
{
|
||
|
|
struct ZpfsDir *zpfsDir = (struct ZpfsDir *)(dir->u.zpfs);
|
||
|
|
if (zpfsDir->relPath) {
|
||
|
|
free(zpfsDir->relPath);
|
||
|
|
zpfsDir->relPath = NULL;
|
||
|
|
}
|
||
|
|
free(zpfsDir);
|
||
|
|
zpfsDir = NULL;
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int IsExistInEntries(const struct ZpfsConfig *zpfsCfg, const char* relPath, const int index)
|
||
|
|
{
|
||
|
|
struct ZpfsEntry entry;
|
||
|
|
struct stat buf;
|
||
|
|
for (int i = index; i >= 0; i--) {
|
||
|
|
entry.mountedPath = zpfsCfg->orgEntry[i].mountedRelpath;
|
||
|
|
entry.mountedRelpath = (char *)relPath;
|
||
|
|
entry.mountedInode = zpfsCfg->orgEntry[i].mountedInode;
|
||
|
|
if (CheckEntryExist(&entry, NULL, &buf) == OK) {
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int OpenEntry(const struct ZpfsConfig *zpfsCfg,
|
||
|
|
const struct ZpfsDir *zpfsDir, struct fs_dirent_s *dir, const int index)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
char *fullPath;
|
||
|
|
char *path = (char *)zpfsCfg->orgEntry[index].mountedRelpath;
|
||
|
|
char *relPath = zpfsDir->relPath;
|
||
|
|
struct inode *curInode = zpfsCfg->orgEntry[index].mountedInode;
|
||
|
|
int len = strlen(path) + strlen(relPath) + 1;
|
||
|
|
int fullLen = len + 1;
|
||
|
|
fullPath = (char *)malloc(fullLen);
|
||
|
|
if (fullPath == NULL) {
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
ret = snprintf_s(fullPath, fullLen, len, "%s/%s", path, relPath);
|
||
|
|
if (ret < 0) {
|
||
|
|
free(fullPath);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
ret = -ENOSYS;
|
||
|
|
if (curInode->u.i_mops->opendir != NULL) {
|
||
|
|
ret = curInode->u.i_mops->opendir(curInode, fullPath, dir);
|
||
|
|
}
|
||
|
|
free(fullPath);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsReadDir(struct inode *mountpt, struct fs_dirent_s *dir)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct inode *oldInode = NULL;
|
||
|
|
struct inode *curInode = NULL;
|
||
|
|
struct ZpfsDir *zpfsDir = (struct ZpfsDir *)dir->u.zpfs;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(mountpt);
|
||
|
|
|
||
|
|
int index = zpfsDir->index;
|
||
|
|
do {
|
||
|
|
if (zpfsDir->openEntry == -1) {
|
||
|
|
zpfsDir->index--;
|
||
|
|
index = zpfsDir->index;
|
||
|
|
if (index < 0) {
|
||
|
|
ret = -1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
ret = OpenEntry(zpfsCfg, zpfsDir, dir, index);
|
||
|
|
if (ret != OK) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
zpfsDir->openEntry = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
curInode = zpfsCfg->orgEntry[index].mountedInode;
|
||
|
|
oldInode = dir->fd_root;
|
||
|
|
dir->fd_root = curInode;
|
||
|
|
ret = curInode->u.i_mops->readdir(curInode, dir);
|
||
|
|
dir->fd_root = oldInode;
|
||
|
|
if (ret != OK) {
|
||
|
|
if (index >= 0) {
|
||
|
|
CloseEntry(zpfsCfg, dir, index);
|
||
|
|
zpfsDir->openEntry = -1;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
} else if (IsExistInEntries(zpfsCfg, dir->fd_dir[0].d_name, (index - 1)) == OK) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
ret = 1; // 1 means current op return one file
|
||
|
|
dir->fd_position++;
|
||
|
|
dir->fd_dir[0].d_off = dir->fd_position;
|
||
|
|
dir->fd_dir[0].d_reclen = (uint16_t)sizeof(struct dirent);
|
||
|
|
break;
|
||
|
|
} while (1);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsRewindDir(struct inode *mountpt, struct fs_dirent_s *dir)
|
||
|
|
{
|
||
|
|
PRINT_DEBUG("%s NOT support!\n", __FUNCTION__);
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsBind(struct inode *blkDriver, const void *data, FAR void **handle, const char *relPath)
|
||
|
|
{
|
||
|
|
if (data == NULL) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
(*handle) = (void*)data;
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsUnbind(void *handle, struct inode **blkDriver)
|
||
|
|
{
|
||
|
|
struct inode *node = NULL;
|
||
|
|
ZpfsConfig *zpfsCfg = NULL;
|
||
|
|
if (handle != NULL) {
|
||
|
|
zpfsCfg = (ZpfsConfig *)handle;
|
||
|
|
node = inode_unlink(zpfsCfg->patchTarget);
|
||
|
|
INODE_SET_TYPE(node, FSNODEFLAG_DELETED);
|
||
|
|
if (node != zpfsCfg->patchInode) {
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsStatFs(struct inode *mountpt, struct statfs *buf)
|
||
|
|
{
|
||
|
|
if (buf == NULL) {
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
(void)memset_s(buf, sizeof(struct statfs), 0, sizeof(struct statfs));
|
||
|
|
buf->f_type = ZPFS_MAGIC;
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int VfsZpfsStat(struct inode *mountpt, const char *relPath, struct stat *buf)
|
||
|
|
{
|
||
|
|
struct inode *inode = NULL;
|
||
|
|
ZpfsConfig *zpfsCfg = GetZpfsConfig(mountpt);
|
||
|
|
inode = GetRelInodeFromVInode(zpfsCfg, relPath, buf, NULL);
|
||
|
|
if (inode == NULL) {
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct mountpt_operations zpfsOperations = {
|
||
|
|
VfsZpfsOpen, /* open */
|
||
|
|
VfsZpfsClose, /* close */
|
||
|
|
VfsZpfsRead, /* read */
|
||
|
|
NULL, /* write */
|
||
|
|
VfsZpfsLseek, /* seek */
|
||
|
|
NULL, /* ioctl */
|
||
|
|
OsVfsFileMmap, /* mmap */
|
||
|
|
NULL, /* sync */
|
||
|
|
VfsZpfsDup, /* dup */
|
||
|
|
NULL, /* fstat */
|
||
|
|
NULL, /* truncate */
|
||
|
|
VfsZpfsOpenDir, /* opendir */
|
||
|
|
VfsZpfsCloseDir, /* closedir */
|
||
|
|
VfsZpfsReadDir, /* readdir */
|
||
|
|
VfsZpfsRewindDir, /* rewinddir */
|
||
|
|
VfsZpfsBind, /* bind */
|
||
|
|
VfsZpfsUnbind, /* unbind */
|
||
|
|
VfsZpfsStatFs, /* statfs */
|
||
|
|
NULL, /* virstatfs */
|
||
|
|
NULL, /* unlink */
|
||
|
|
NULL, /* mkdir */
|
||
|
|
NULL, /* rmdir */
|
||
|
|
NULL, /* rename */
|
||
|
|
VfsZpfsStat, /* stat */
|
||
|
|
NULL, /* utime */
|
||
|
|
NULL, /* chattr */
|
||
|
|
VfsZpfsLseek64, /* seek64 */
|
||
|
|
NULL, /* getlabel */
|
||
|
|
NULL, /* fallocate */
|
||
|
|
NULL, /* fallocate64 */
|
||
|
|
NULL, /* truncate64 */
|
||
|
|
NULL, /* fscheck */
|
||
|
|
NULL, /* map_pages */
|
||
|
|
NULL, /* readpage */
|
||
|
|
NULL, /* writepage */
|
||
|
|
};
|
||
|
|
|
||
|
|
FSMAP_ENTRY(zpfs_fsmap, ZPFS_NAME, zpfsOperations, FALSE, FALSE);
|
||
|
|
|
||
|
|
#endif // LOSCFG_FS_ZPFS
|