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[Qemu-devel] [PATCH v5 4/8] linux-user: Add support for ustat() syscall
From: |
Aleksandar Markovic |
Subject: |
[Qemu-devel] [PATCH v5 4/8] linux-user: Add support for ustat() syscall |
Date: |
Wed, 14 Sep 2016 22:19:57 +0200 |
From: Aleksandar Markovic <address@hidden>
This patch implements Qemu user mode ustat() syscall support.
Syscall ustat() returns information about a mounted filesystem.
The implementation is similar to the implementations of statfs(),
fstatfs() and other related syscalls. It is based on invocation of
host's ustat(), and its key part is in the correspondent case segment
of the main switch statement of the function do_syscall(), in file
linux-user/syscalls.c. All necessary conversions of data structures
from target to host and from host to target are covered. Sufficient
support for "-strace" option for this syscall is already present,
and this patch does not change it.
This patch also fixes failures of LTP tests ustat01, and ustat02, if
executed on Qemu-emulated systems.
Signed-off-by: Aleksandar Markovic <address@hidden>
---
linux-user/syscall.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 3436ee6..7f8ae41 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -48,6 +48,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/statfs.h>
+#include <ustat.h>
#include <utime.h>
#include <sys/sysinfo.h>
#include <sys/signalfd.h>
@@ -8098,7 +8099,29 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
break;
#ifdef TARGET_NR_ustat
case TARGET_NR_ustat:
- goto unimplemented;
+ {
+ struct ustat ust;
+ int cnt;
+ ret = get_errno(ustat(arg1, &ust));
+
+ if (!is_error(ret)) {
+ struct ustat *target_ust;
+
+ if (!lock_user_struct(VERIFY_WRITE, target_ust, arg2, 0)) {
+ goto efault;
+ }
+
+ __put_user(ust.f_tfree, &target_ust->f_tfree);
+ __put_user(ust.f_tinode, &target_ust->f_tinode);
+
+ for (cnt = 0; cnt < 6; cnt++) {
+ __put_user(ust.f_fname[cnt], &target_ust->f_fname[cnt]);
+ __put_user(ust.f_fpack[cnt], &target_ust->f_fpack[cnt]);
+ }
+ unlock_user_struct(target_ust, arg2, 1);
+ }
+ break;
+ }
#endif
#ifdef TARGET_NR_dup2
case TARGET_NR_dup2:
--
2.9.3
- [Qemu-devel] [PATCH v5 0/8] linux user: Fix assorted Qemu user mode issues, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 1/8] linux-user: Add support for adjtimex() syscall, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 2/8] linux-user: Add support for clock_adjtime() syscall, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 3/8] linux-user: Add support for sysfs() syscall, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 4/8] linux-user: Add support for ustat() syscall,
Aleksandar Markovic <=
- [Qemu-devel] [PATCH v5 5/8] linux-user: Fix msgrcv() and msgsnd() syscalls support, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 6/8] linux-user: Fix socketcall() syscall support, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 7/8] linux-user: Fix syslog() syscall support, Aleksandar Markovic, 2016/09/14
- [Qemu-devel] [PATCH v5 8/8] linux-user: Remove a duplicate item from strace.list, Aleksandar Markovic, 2016/09/14