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[component] add sys_mount and umount2 (#7516)

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xiao-mang 2023-05-17 16:30:05 +08:00 committed by GitHub
parent 014f885d9c
commit 065a3e1b3a
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1 changed files with 82 additions and 0 deletions
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82
components/lwp/lwp_syscall.c
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@ -4821,6 +4821,86 @@ sysret_t sys_fstatfs64(int fd, size_t sz, struct statfs *buf)
return ret;
}
sysret_t sys_mount(char *source, char *target,
char *filesystemtype,
unsigned long mountflags, void *data)
{
char *copy_source;
char *copy_target;
char *copy_filesystemtype;
size_t len_source, copy_len_source;
size_t len_target, copy_len_target;
size_t len_filesystemtype, copy_len_filesystemtype;
int err_source, err_target, err_filesystemtype;
char *tmp = NULL;
int ret = 0;
len_source = lwp_user_strlen(source, &err_source);
len_target = lwp_user_strlen(target, &err_target);
len_filesystemtype = lwp_user_strlen(filesystemtype, &err_filesystemtype);
if (err_source || err_target || err_filesystemtype)
{
return -EFAULT;
}
copy_source = (char*)rt_malloc(len_source + 1 + len_target + 1 + len_filesystemtype + 1);
if (!copy_source)
{
return -ENOMEM;
}
copy_target = copy_source + len_source + 1;
copy_filesystemtype = copy_target + len_target + 1;
copy_len_source = lwp_get_from_user(copy_source, source, len_source);
copy_source[copy_len_source] = '\0';
copy_len_target = lwp_get_from_user(copy_target, target, len_target);
copy_target[copy_len_target] = '\0';
copy_len_filesystemtype = lwp_get_from_user(copy_filesystemtype, filesystemtype, len_filesystemtype);
copy_filesystemtype[copy_len_filesystemtype] = '\0';
if (strcmp(copy_filesystemtype, "nfs") == 0)
{
tmp = copy_source;
copy_source = NULL;
}
if (strcmp(copy_filesystemtype, "tmp") == 0)
{
copy_source = NULL;
}
ret = dfs_mount(copy_source, copy_target, copy_filesystemtype, 0, tmp);
rt_free(copy_source);
return ret;
}
sysret_t sys_umount2(char *__special_file, int __flags)
{
char *copy_special_file;
size_t len_special_file, copy_len_special_file;
int err_special_file;
int ret = 0;
len_special_file = lwp_user_strlen(__special_file, &err_special_file);
if (err_special_file)
{
return -EFAULT;
}
copy_special_file = (char*)rt_malloc(len_special_file + 1);
if (!copy_special_file)
{
return -ENOMEM;
}
copy_len_special_file = lwp_get_from_user(copy_special_file, __special_file, len_special_file);
copy_special_file[copy_len_special_file] = '\0';
ret = dfs_unmount(copy_special_file);
rt_free(copy_special_file);
return ret;
}
const static struct rt_syscall_def func_table[] =
{
SYSCALL_SIGN(sys_exit), /* 01 */
@ -5037,6 +5117,8 @@ const static struct rt_syscall_def func_table[] =
SYSCALL_SIGN(sys_fstatfs),
SYSCALL_SIGN(sys_fstatfs64),
SYSCALL_SIGN(sys_openat), /* 175 */
SYSCALL_SIGN(sys_mount),
SYSCALL_SIGN(sys_umount2),
};
const void *lwp_get_sys_api(rt_uint32_t number)