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bsd-user: Implement mount, umount and nmount

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Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2022-06-14 14:39:39 -06:00
parent d495e432c0
commit af2ae2e8ac
2 changed files with 65 additions and 0 deletions
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52
bsd-user/bsd-file.h
View File

@ -549,4 +549,56 @@ static abi_long do_bsd_sync(void)
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;
}
#endif /* BSD_FILE_H */

13
bsd-user/freebsd/os-syscall.c
View File

@ -33,6 +33,7 @@
#include "qemu/path.h"
#include <sys/syscall.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <utime.h>
@ -373,6 +374,18 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
ret = do_bsd_sync();
break;
case TARGET_FREEBSD_NR_mount: /* mount(2) */
ret = do_bsd_mount(arg1, arg2, arg3, arg4);
break;
case TARGET_FREEBSD_NR_unmount: /* unmount(2) */
ret = do_bsd_unmount(arg1, arg2);
break;
case TARGET_FREEBSD_NR_nmount: /* nmount(2) */
ret = do_bsd_nmount(arg1, arg2, arg3);
break;
default:
qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
ret = -TARGET_ENOSYS;