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linux-user: Implement setxattr/getxattr/removexattr syscalls

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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: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: An-Cheng Huang <ancheng@ubnt.com>
This commit is contained in:
An-Cheng Huang 2011-08-09 12:34:06 -07:00 committed by Riku Voipio
parent 94c19610a6
commit a790ae389b
1 changed files with 51 additions and 3 deletions
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54
linux-user/syscall.c
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@ -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
@ -7642,22 +7645,67 @@ 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)