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[Qemu-devel] [PATCH 3/3] linux-user: Implement setxattr/getxattr/removex
From: |
An-Cheng Huang |
Subject: |
[Qemu-devel] [PATCH 3/3] linux-user: Implement setxattr/getxattr/removexattr syscalls |
Date: |
Tue, 9 Aug 2011 12:34:06 -0700 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
This patch implements the setxattr, getxattr, and removexattr syscalls
if CONFIG_ATTR is enabled.
Note that since libattr uses indirect syscalls for these, this change
depends on the fix for indirect syscall handling on MIPS.
Signed-off-by: An-Cheng Huang <address@hidden>
---
linux-user/syscall.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 51 insertions(+), 3 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 73f9baa..afc6b5d 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -70,6 +70,9 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#ifdef CONFIG_EPOLL
#include <sys/epoll.h>
#endif
+#ifdef CONFIG_ATTR
+#include <attr/xattr.h>
+#endif
#define termios host_termios
#define winsize host_winsize
@@ -7633,22 +7636,67 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#endif
break;
#endif
+#ifdef CONFIG_ATTR
#ifdef TARGET_NR_setxattr
- case TARGET_NR_setxattr:
case TARGET_NR_lsetxattr:
case TARGET_NR_fsetxattr:
- case TARGET_NR_getxattr:
case TARGET_NR_lgetxattr:
case TARGET_NR_fgetxattr:
case TARGET_NR_listxattr:
case TARGET_NR_llistxattr:
case TARGET_NR_flistxattr:
- case TARGET_NR_removexattr:
case TARGET_NR_lremovexattr:
case TARGET_NR_fremovexattr:
ret = -TARGET_EOPNOTSUPP;
break;
+ case TARGET_NR_setxattr:
+ {
+ void *p, *n, *v;
+ p = lock_user_string(arg1);
+ n = lock_user_string(arg2);
+ v = lock_user(VERIFY_READ, arg3, arg4, 1);
+ if (p && n && v) {
+ ret = get_errno(setxattr(p, n, v, arg4, arg5));
+ } else {
+ ret = -TARGET_EFAULT;
+ }
+ unlock_user(p, arg1, 0);
+ unlock_user(n, arg2, 0);
+ unlock_user(v, arg3, 0);
+ }
+ break;
+ case TARGET_NR_getxattr:
+ {
+ void *p, *n, *v;
+ p = lock_user_string(arg1);
+ n = lock_user_string(arg2);
+ v = lock_user(VERIFY_WRITE, arg3, arg4, 0);
+ if (p && n && v) {
+ ret = get_errno(getxattr(p, n, v, arg4));
+ } else {
+ ret = -TARGET_EFAULT;
+ }
+ unlock_user(p, arg1, 0);
+ unlock_user(n, arg2, 0);
+ unlock_user(v, arg3, arg4);
+ }
+ break;
+ case TARGET_NR_removexattr:
+ {
+ void *p, *n;
+ p = lock_user_string(arg1);
+ n = lock_user_string(arg2);
+ if (p && n) {
+ ret = get_errno(removexattr(p, n));
+ } else {
+ ret = -TARGET_EFAULT;
+ }
+ unlock_user(p, arg1, 0);
+ unlock_user(n, arg2, 0);
+ }
+ break;
#endif
+#endif /* CONFIG_ATTR */
#ifdef TARGET_NR_set_thread_area
case TARGET_NR_set_thread_area:
#if defined(TARGET_MIPS)
--
1.7.2.5
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