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authorWarner Losh <imp@bsdimp.com>2022-06-14 14:39:39 -0600
committerWarner Losh <imp@bsdimp.com>2022-07-02 07:51:03 -0600
commitaf2ae2e8acfe2f64c12607be48a9f6a677b29a07 (patch)
tree846661eaa52762e58792fe20d0b02869a009847f
parentd495e432c04a6394126c35cf96517749708b410f (diff)
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bsd-user: Implement mount, umount and nmount
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>
-rw-r--r--bsd-user/bsd-file.h52
-rw-r--r--bsd-user/freebsd/os-syscall.c13
2 files changed, 65 insertions, 0 deletions
diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
index b2dca58..a0f0310 100644
--- a/bsd-user/bsd-file.h
+++ b/bsd-user/bsd-file.h
@@ -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 */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index 2623caf..bd4dfa6 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -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;