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FRET-qemu/bsd-user/bsd-file.h
Warner Losh 79cfae0c1b bsd-user: Implement freebsd11_mknod, freebsd11_mknodat and mknodat 
These implement both the old-pre INO64 mknod variations, as well as the
now current INO64 variant. Make direct syscall calls for these older
syscalls to avloid too many dependencies.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Michal Meloun <mmel@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-02 07:52:48 -06:00

772 lines
17 KiB
C
Raw Blame History

/*
* file related system call shims and definitions
*
* Copyright (c) 2013 Stacey D. Son
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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/>.
*/
#ifndef BSD_FILE_H
#define BSD_FILE_H
#include "qemu/path.h"
#define LOCK_PATH(p, arg) \
do { \
(p) = lock_user_string(arg); \
if ((p) == NULL) { \
return -TARGET_EFAULT; \
} \
} while (0)
#define UNLOCK_PATH(p, arg) unlock_user(p, arg, 0)
#define LOCK_PATH2(p1, arg1, p2, arg2) \
do { \
(p1) = lock_user_string(arg1); \
if ((p1) == NULL) { \
return -TARGET_EFAULT; \
} \
(p2) = lock_user_string(arg2); \
if ((p2) == NULL) { \
unlock_user(p1, arg1, 0); \
return -TARGET_EFAULT; \
} \
} while (0)
#define UNLOCK_PATH2(p1, arg1, p2, arg2) \
do { \
unlock_user(p2, arg2, 0); \
unlock_user(p1, arg1, 0); \
} while (0)
extern struct iovec *lock_iovec(int type, abi_ulong target_addr, int count,
int copy);
extern void unlock_iovec(struct iovec *vec, abi_ulong target_addr, int count,
int copy);
int safe_open(const char *path, int flags, mode_t mode);
int safe_openat(int fd, const char *path, int flags, mode_t mode);
ssize_t safe_read(int fd, void *buf, size_t nbytes);
ssize_t safe_pread(int fd, void *buf, size_t nbytes, off_t offset);
ssize_t safe_readv(int fd, const struct iovec *iov, int iovcnt);
ssize_t safe_preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset);
ssize_t safe_write(int fd, void *buf, size_t nbytes);
ssize_t safe_pwrite(int fd, void *buf, size_t nbytes, off_t offset);
ssize_t safe_writev(int fd, const struct iovec *iov, int iovcnt);
ssize_t safe_pwritev(int fd, const struct iovec *iov, int iovcnt, off_t offset);
/* read(2) */
static abi_long do_bsd_read(abi_long arg1, abi_long arg2, abi_long arg3)
{
abi_long ret;
void *p;
p = lock_user(VERIFY_WRITE, arg2, arg3, 0);
if (p == NULL) {
return -TARGET_EFAULT;
}
ret = get_errno(safe_read(arg1, p, arg3));
unlock_user(p, arg2, ret);
return ret;
}
/* pread(2) */
static abi_long do_bsd_pread(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
{
abi_long ret;
void *p;
p = lock_user(VERIFY_WRITE, arg2, arg3, 0);
if (p == NULL) {
return -TARGET_EFAULT;
}
if (regpairs_aligned(cpu_env) != 0) {
arg4 = arg5;
arg5 = arg6;
}
ret = get_errno(safe_pread(arg1, p, arg3, target_arg64(arg4, arg5)));
unlock_user(p, arg2, ret);
return ret;
}
/* readv(2) */
static abi_long do_bsd_readv(abi_long arg1, abi_long arg2, abi_long arg3)
{
abi_long ret;
struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0);
if (vec != NULL) {
ret = get_errno(safe_readv(arg1, vec, arg3));
unlock_iovec(vec, arg2, arg3, 1);
} else {
ret = -host_to_target_errno(errno);
}
return ret;
}
/* preadv(2) */
static abi_long do_bsd_preadv(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
{
abi_long ret;
struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 1);
if (vec != NULL) {
if (regpairs_aligned(cpu_env) != 0) {
arg4 = arg5;
arg5 = arg6;
}
ret = get_errno(safe_preadv(arg1, vec, arg3, target_arg64(arg4, arg5)));
unlock_iovec(vec, arg2, arg3, 0);
} else {
ret = -host_to_target_errno(errno);
}
return ret;
}
/* write(2) */
static abi_long do_bsd_write(abi_long arg1, abi_long arg2, abi_long arg3)
{
abi_long nbytes, ret;
void *p;
/* nbytes < 0 implies that it was larger than SIZE_MAX. */
nbytes = arg3;
if (nbytes < 0) {
return -TARGET_EINVAL;
}
p = lock_user(VERIFY_READ, arg2, nbytes, 1);
if (p == NULL) {
return -TARGET_EFAULT;
}
ret = get_errno(safe_write(arg1, p, arg3));
unlock_user(p, arg2, 0);
return ret;
}
/* pwrite(2) */
static abi_long do_bsd_pwrite(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
{
abi_long ret;
void *p;
p = lock_user(VERIFY_READ, arg2, arg3, 1);
if (p == NULL) {
return -TARGET_EFAULT;
}
if (regpairs_aligned(cpu_env) != 0) {
arg4 = arg5;
arg5 = arg6;
}
ret = get_errno(safe_pwrite(arg1, p, arg3, target_arg64(arg4, arg5)));
unlock_user(p, arg2, 0);
return ret;
}
/* writev(2) */
static abi_long do_bsd_writev(abi_long arg1, abi_long arg2, abi_long arg3)
{
abi_long ret;
struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
if (vec != NULL) {
ret = get_errno(safe_writev(arg1, vec, arg3));
unlock_iovec(vec, arg2, arg3, 0);
} else {
ret = -host_to_target_errno(errno);
}
return ret;
}
/* pwritev(2) */
static abi_long do_bsd_pwritev(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6)
{
abi_long ret;
struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
if (vec != NULL) {
if (regpairs_aligned(cpu_env) != 0) {
arg4 = arg5;
arg5 = arg6;
}
ret = get_errno(safe_pwritev(arg1, vec, arg3, target_arg64(arg4, arg5)));
unlock_iovec(vec, arg2, arg3, 0);
} else {
ret = -host_to_target_errno(errno);
}
return ret;
}
/* open(2) */
static abi_long do_bsd_open(abi_long arg1, abi_long arg2, abi_long arg3)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(safe_open(path(p), target_to_host_bitmask(arg2,
fcntl_flags_tbl), arg3));
UNLOCK_PATH(p, arg1);
return ret;
}
/* openat(2) */
static abi_long do_bsd_openat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
ret = get_errno(safe_openat(arg1, path(p),
target_to_host_bitmask(arg3, fcntl_flags_tbl), arg4));
UNLOCK_PATH(p, arg2);
return ret;
}
/* close(2) */
static inline abi_long do_bsd_close(abi_long arg1)
{
return get_errno(close(arg1));
}
/* fdatasync(2) */
static abi_long do_bsd_fdatasync(abi_long arg1)
{
return get_errno(fdatasync(arg1));
}
/* fsync(2) */
static abi_long do_bsd_fsync(abi_long arg1)
{
return get_errno(fsync(arg1));
}
/* closefrom(2) */
static abi_long do_bsd_closefrom(abi_long arg1)
{
closefrom(arg1); /* returns void */
return get_errno(0);
}
/* revoke(2) */
static abi_long do_bsd_revoke(abi_long arg1)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(revoke(p)); /* XXX path(p)? */
UNLOCK_PATH(p, arg1);
return ret;
}
/* access(2) */
static abi_long do_bsd_access(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(access(path(p), arg2));
UNLOCK_PATH(p, arg1);
return ret;
}
/* eaccess(2) */
static abi_long do_bsd_eaccess(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(eaccess(path(p), arg2));
UNLOCK_PATH(p, arg1);
return ret;
}
/* faccessat(2) */
static abi_long do_bsd_faccessat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
ret = get_errno(faccessat(arg1, p, arg3, arg4)); /* XXX path(p)? */
UNLOCK_PATH(p, arg2);
return ret;
}
/* chdir(2) */
static abi_long do_bsd_chdir(abi_long arg1)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(chdir(p)); /* XXX path(p)? */
UNLOCK_PATH(p, arg1);
return ret;
}
/* fchdir(2) */
static abi_long do_bsd_fchdir(abi_long arg1)
{
return get_errno(fchdir(arg1));
}
/* rename(2) */
static abi_long do_bsd_rename(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg1, p2, arg2);
ret = get_errno(rename(p1, p2)); /* XXX path(p1), path(p2) */
UNLOCK_PATH2(p1, arg1, p2, arg2);
return ret;
}
/* renameat(2) */
static abi_long do_bsd_renameat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg2, p2, arg4);
ret = get_errno(renameat(arg1, p1, arg3, p2));
UNLOCK_PATH2(p1, arg2, p2, arg4);
return ret;
}
/* link(2) */
static abi_long do_bsd_link(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg1, p2, arg2);
ret = get_errno(link(p1, p2)); /* XXX path(p1), path(p2) */
UNLOCK_PATH2(p1, arg1, p2, arg2);
return ret;
}
/* linkat(2) */
static abi_long do_bsd_linkat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4, abi_long arg5)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg2, p2, arg4);
ret = get_errno(linkat(arg1, p1, arg3, p2, arg5));
UNLOCK_PATH2(p1, arg2, p2, arg4);
return ret;
}
/* unlink(2) */
static abi_long do_bsd_unlink(abi_long arg1)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(unlink(p)); /* XXX path(p) */
UNLOCK_PATH(p, arg1);
return ret;
}
/* unlinkat(2) */
static abi_long do_bsd_unlinkat(abi_long arg1, abi_long arg2,
abi_long arg3)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
ret = get_errno(unlinkat(arg1, p, arg3)); /* XXX path(p) */
UNLOCK_PATH(p, arg2);
return ret;
}
/* mkdir(2) */
static abi_long do_bsd_mkdir(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(mkdir(p, arg2)); /* XXX path(p) */
UNLOCK_PATH(p, arg1);
return ret;
}
/* mkdirat(2) */
static abi_long do_bsd_mkdirat(abi_long arg1, abi_long arg2,
abi_long arg3)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
ret = get_errno(mkdirat(arg1, p, arg3));
UNLOCK_PATH(p, arg2);
return ret;
}
/* rmdir(2) */
static abi_long do_bsd_rmdir(abi_long arg1)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(rmdir(p)); /* XXX path(p)? */
UNLOCK_PATH(p, arg1);
return ret;
}
/* undocumented __getcwd(char *buf, size_t len) system call */
static abi_long do_bsd___getcwd(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
p = lock_user(VERIFY_WRITE, arg1, arg2, 0);
if (p == NULL) {
return -TARGET_EFAULT;
}
ret = safe_syscall(SYS___getcwd, p, arg2);
unlock_user(p, arg1, ret == 0 ? strlen(p) + 1 : 0);
return get_errno(ret);
}
/* dup(2) */
static abi_long do_bsd_dup(abi_long arg1)
{
return get_errno(dup(arg1));
}
/* dup2(2) */
static abi_long do_bsd_dup2(abi_long arg1, abi_long arg2)
{
return get_errno(dup2(arg1, arg2));
}
/* truncate(2) */
static abi_long do_bsd_truncate(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
if (regpairs_aligned(cpu_env) != 0) {
arg2 = arg3;
arg3 = arg4;
}
ret = get_errno(truncate(p, target_arg64(arg2, arg3)));
UNLOCK_PATH(p, arg1);
return ret;
}
/* ftruncate(2) */
static abi_long do_bsd_ftruncate(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4)
{
if (regpairs_aligned(cpu_env) != 0) {
arg2 = arg3;
arg3 = arg4;
}
return get_errno(ftruncate(arg1, target_arg64(arg2, arg3)));
}
/* acct(2) */
static abi_long do_bsd_acct(abi_long arg1)
{
abi_long ret;
void *p;
if (arg1 == 0) {
ret = get_errno(acct(NULL));
} else {
LOCK_PATH(p, arg1);
ret = get_errno(acct(path(p)));
UNLOCK_PATH(p, arg1);
}
return ret;
}
/* sync(2) */
static abi_long do_bsd_sync(void)
{
sync();
return 0;
}
/* mount(2) */
static abi_long do_bsd_mount(abi_long arg1, abi_long arg2, abi_long arg3,
abi_long arg4)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg1, p2, arg2);
/*
* XXX arg4 should be locked, but it isn't clear how to do that since it may
* be not be a NULL-terminated string.
*/
if (arg4 == 0) {
ret = get_errno(mount(p1, p2, arg3, NULL)); /* XXX path(p2)? */
} else {
ret = get_errno(mount(p1, p2, arg3, g2h_untagged(arg4))); /* XXX path(p2)? */
}
UNLOCK_PATH2(p1, arg1, p2, arg2);
return ret;
}
/* unmount(2) */
static abi_long do_bsd_unmount(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(unmount(p, arg2)); /* XXX path(p)? */
UNLOCK_PATH(p, arg1);
return ret;
}
/* nmount(2) */
static abi_long do_bsd_nmount(abi_long arg1, abi_long count,
abi_long flags)
{
abi_long ret;
struct iovec *vec = lock_iovec(VERIFY_READ, arg1, count, 1);
if (vec != NULL) {
ret = get_errno(nmount(vec, count, flags));
unlock_iovec(vec, arg1, count, 0);
} else {
return -TARGET_EFAULT;
}
return ret;
}
/* symlink(2) */
static abi_long do_bsd_symlink(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg1, p2, arg2);
ret = get_errno(symlink(p1, p2)); /* XXX path(p1), path(p2) */
UNLOCK_PATH2(p1, arg1, p2, arg2);
return ret;
}
/* symlinkat(2) */
static abi_long do_bsd_symlinkat(abi_long arg1, abi_long arg2,
abi_long arg3)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg1, p2, arg3);
ret = get_errno(symlinkat(p1, arg2, p2)); /* XXX path(p1), path(p2) */
UNLOCK_PATH2(p1, arg1, p2, arg3);
return ret;
}
/* readlink(2) */
static abi_long do_bsd_readlink(CPUArchState *env, abi_long arg1,
abi_long arg2, abi_long arg3)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH(p1, arg1);
p2 = lock_user(VERIFY_WRITE, arg2, arg3, 0);
if (p2 == NULL) {
UNLOCK_PATH(p1, arg1);
return -TARGET_EFAULT;
}
if (strcmp(p1, "/proc/curproc/file") == 0) {
CPUState *cpu = env_cpu(env);
TaskState *ts = (TaskState *)cpu->opaque;
strncpy(p2, ts->bprm->fullpath, arg3);
ret = MIN((abi_long)strlen(ts->bprm->fullpath), arg3);
} else {
ret = get_errno(readlink(path(p1), p2, arg3));
}
unlock_user(p2, arg2, ret);
UNLOCK_PATH(p1, arg1);
return ret;
}
/* readlinkat(2) */
static abi_long do_bsd_readlinkat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH(p1, arg2);
p2 = lock_user(VERIFY_WRITE, arg3, arg4, 0);
if (p2 == NULL) {
UNLOCK_PATH(p1, arg2);
return -TARGET_EFAULT;
}
ret = get_errno(readlinkat(arg1, p1, p2, arg4));
unlock_user(p2, arg3, ret);
UNLOCK_PATH(p1, arg2);
return ret;
}
/* chmod(2) */
static abi_long do_bsd_chmod(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(chmod(p, arg2)); /* XXX path(p)? */
UNLOCK_PATH(p, arg1);
return ret;
}
/* fchmod(2) */
static abi_long do_bsd_fchmod(abi_long arg1, abi_long arg2)
{
return get_errno(fchmod(arg1, arg2));
}
/* lchmod(2) */
static abi_long do_bsd_lchmod(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(lchmod(p, arg2)); /* XXX path(p)? */
UNLOCK_PATH(p, arg1);
return ret;
}
/* fchmodat(2) */
static abi_long do_bsd_fchmodat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
ret = get_errno(fchmodat(arg1, p, arg3, arg4));
UNLOCK_PATH(p, arg2);
return ret;
}
/* pre-ino64 mknod(2) */
static abi_long do_bsd_freebsd11_mknod(abi_long arg1, abi_long arg2, abi_long arg3)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg1);
ret = get_errno(syscall(SYS_freebsd11_mknod, p, arg2, arg3));
UNLOCK_PATH(p, arg1);
return ret;
}
/* pre-ino64 mknodat(2) */
static abi_long do_bsd_freebsd11_mknodat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
ret = get_errno(syscall(SYS_freebsd11_mknodat, arg1, p, arg3, arg4));
UNLOCK_PATH(p, arg2);
return ret;
}
/* post-ino64 mknodat(2) */
static abi_long do_bsd_mknodat(void *cpu_env, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
abi_long arg6)
{
abi_long ret;
void *p;
LOCK_PATH(p, arg2);
/* 32-bit arch's use two 32 registers for 64 bit return value */
if (regpairs_aligned(cpu_env) != 0) {
ret = get_errno(mknodat(arg1, p, arg3, target_arg64(arg5, arg6)));
} else {
ret = get_errno(mknodat(arg1, p, arg3, target_arg64(arg4, arg5)));
}
UNLOCK_PATH(p, arg2);
return ret;
}
#endif /* BSD_FILE_H */
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