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[Qemu-devel] [PATCH v3 12/16] linux-user: support {name_to, open_by}_han
From: |
Paul Burton |
Subject: |
[Qemu-devel] [PATCH v3 12/16] linux-user: support {name_to, open_by}_handle_at syscalls |
Date: |
Sun, 22 Jun 2014 11:25:44 +0100 |
Implement support for the name_to_handle_at and open_by_handle_at
syscalls, allowing their use by the target program.
Signed-off-by: Paul Burton <address@hidden>
---
Changes in v3:
- Fix coding style, checkpatch clean.
Changes in v2:
- None.
---
linux-user/strace.c | 30 ++++++++++++++++++++++++++
linux-user/strace.list | 6 ++++++
linux-user/syscall.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 93 insertions(+)
diff --git a/linux-user/strace.c b/linux-user/strace.c
index ea6c1d2..c20ddf1 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -1552,6 +1552,36 @@ print_kill(const struct syscallname *name,
}
#endif
+#ifdef TARGET_NR_name_to_handle_at
+static void
+print_name_to_handle_at(const struct syscallname *name,
+ abi_long arg0, abi_long arg1, abi_long arg2,
+ abi_long arg3, abi_long arg4, abi_long arg5)
+{
+ print_syscall_prologue(name);
+ print_at_dirfd(arg0, 0);
+ print_string(arg1, 0);
+ print_pointer(arg2, 0);
+ print_pointer(arg3, 0);
+ print_raw_param("0x%x", arg4, 1);
+ print_syscall_epilogue(name);
+}
+#endif
+
+#ifdef TARGET_NR_open_by_handle_at
+static void
+print_open_by_handle_at(const struct syscallname *name,
+ abi_long arg0, abi_long arg1, abi_long arg2,
+ abi_long arg3, abi_long arg4, abi_long arg5)
+{
+ print_syscall_prologue(name);
+ print_raw_param("%d", arg0, 0);
+ print_pointer(arg2, 0);
+ print_open_flags(arg3, 1);
+ print_syscall_epilogue(name);
+}
+#endif
+
/*
* An array of all of the syscalls we know about
*/
diff --git a/linux-user/strace.list b/linux-user/strace.list
index 8de972a..147f579 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -582,6 +582,9 @@
#ifdef TARGET_NR_munmap
{ TARGET_NR_munmap, "munmap" , NULL, print_munmap, NULL },
#endif
+#ifdef TARGET_NR_name_to_handle_at
+{ TARGET_NR_name_to_handle_at, "name_to_handle_at" , NULL,
print_name_to_handle_at, NULL },
+#endif
#ifdef TARGET_NR_nanosleep
{ TARGET_NR_nanosleep, "nanosleep" , NULL, NULL, NULL },
#endif
@@ -624,6 +627,9 @@
#ifdef TARGET_NR_openat
{ TARGET_NR_openat, "openat" , NULL, print_openat, NULL },
#endif
+#ifdef TARGET_NR_open_by_handle_at
+{ TARGET_NR_open_by_handle_at, "open_by_handle_at" , NULL,
print_open_by_handle_at, NULL },
+#endif
#ifdef TARGET_NR_osf_adjtime
{ TARGET_NR_osf_adjtime, "osf_adjtime" , NULL, NULL, NULL },
#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index f90dd99..d8bd773 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5351,6 +5351,63 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
unlock_user(p, arg2, 0);
break;
#endif
+#ifdef TARGET_NR_name_to_handle_at
+ case TARGET_NR_name_to_handle_at:
+ {
+ struct file_handle *fh;
+ uint32_t sz;
+ int mount_id;
+
+ p = lock_user_string(arg2);
+ if (!p) {
+ goto efault;
+ }
+
+ if (get_user_u32(sz, arg3)) {
+ unlock_user(p, arg2, 0);
+ goto efault;
+ }
+
+ fh = lock_user(VERIFY_WRITE, arg3, sizeof(*fh) + sz, 1);
+ if (!fh) {
+ unlock_user(p, arg2, 0);
+ goto efault;
+ }
+
+ ret = get_errno(name_to_handle_at(arg1, path(p), fh,
+ &mount_id, arg5));
+
+ unlock_user(p, arg2, 0);
+ unlock_user(p, arg3, sizeof(*fh) + sz);
+
+ if (put_user_s32(mount_id, arg4)) {
+ goto efault;
+ }
+ }
+ break;
+#endif
+#ifdef TARGET_NR_open_by_handle_at
+ case TARGET_NR_open_by_handle_at:
+ {
+ struct file_handle *fh;
+ uint32_t sz;
+
+ if (get_user_u32(sz, arg2)) {
+ goto efault;
+ }
+
+ fh = lock_user(VERIFY_WRITE, arg2, sizeof(*fh) + sz, 1);
+ if (!fh) {
+ goto efault;
+ }
+
+ ret = get_errno(open_by_handle_at(arg1, fh,
+ target_to_host_bitmask(arg3, fcntl_flags_tbl)));
+
+ unlock_user(p, arg2, sizeof(*fh) + sz);
+ }
+ break;
+#endif
case TARGET_NR_close:
ret = get_errno(close(arg1));
break;
--
2.0.0
- [Qemu-devel] [PATCH v3 02/16] linux-user: support SO_ACCEPTCONN getsockopt option, (continued)
- [Qemu-devel] [PATCH v3 02/16] linux-user: support SO_ACCEPTCONN getsockopt option, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 03/16] linux-user: support SO_{SND, RCV}BUFFORCE setsockopt options, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 05/16] linux-user: allow NULL arguments to mount, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 06/16] linux-user: support strace of epoll_create1, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 04/16] linux-user: support SO_PASSSEC setsockopt option, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 09/16] linux-user: allow NULL tv argument for settimeofday, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 07/16] linux-user: fix struct target_epoll_event layout for MIPS, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 10/16] linux-user: support timerfd_{create, gettime, settime} syscalls, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 08/16] linux-user: respect timezone for settimeofday, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 11/16] linux-user: support ioprio_{get, set} syscalls, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 12/16] linux-user: support {name_to, open_by}_handle_at syscalls,
Paul Burton <=
- [Qemu-devel] [PATCH v3 13/16] linux-user: support the setns syscall, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 15/16] linux-user: support the KDSIGACCEPT ioctl, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 14/16] linux-user: support the unshare syscall, Paul Burton, 2014/06/22
- [Qemu-devel] [PATCH v3 16/16] linux-user: support the SIOCGIFINDEX ioctl, Paul Burton, 2014/06/22