diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2017-06-27 21:32:36 -0400 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-04 13:13:49 -0400 |
commit | 0d0606060baefdb13d3d80dba1b4c816b0676e16 (patch) | |
tree | 1a2546ad468325ea3f6391b62e1c942cba37ef41 /ipc/compat_mq.c | |
parent | cc1a7c4bae28215d042fb9f00dcb77dd65abafdf (diff) |
mqueue: move compat syscalls to native ones
... and stop messing with compat_alloc_user_space() and friends
[braino fix from Colin King folded in]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc/compat_mq.c')
-rw-r--r-- | ipc/compat_mq.c | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/ipc/compat_mq.c b/ipc/compat_mq.c deleted file mode 100644 index ef6f91cc4490..000000000000 --- a/ipc/compat_mq.c +++ /dev/null @@ -1,138 +0,0 @@ -/* - * ipc/compat_mq.c - * 32 bit emulation for POSIX message queue system calls - * - * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author: Arnd Bergmann <arnd@arndb.de> - */ - -#include <linux/compat.h> -#include <linux/fs.h> -#include <linux/kernel.h> -#include <linux/mqueue.h> -#include <linux/syscalls.h> - -#include <linux/uaccess.h> - -struct compat_mq_attr { - compat_long_t mq_flags; /* message queue flags */ - compat_long_t mq_maxmsg; /* maximum number of messages */ - compat_long_t mq_msgsize; /* maximum message size */ - compat_long_t mq_curmsgs; /* number of messages currently queued */ - compat_long_t __reserved[4]; /* ignored for input, zeroed for output */ -}; - -static inline int get_compat_mq_attr(struct mq_attr *attr, - const struct compat_mq_attr __user *uattr) -{ - if (!access_ok(VERIFY_READ, uattr, sizeof *uattr)) - return -EFAULT; - - return __get_user(attr->mq_flags, &uattr->mq_flags) - | __get_user(attr->mq_maxmsg, &uattr->mq_maxmsg) - | __get_user(attr->mq_msgsize, &uattr->mq_msgsize) - | __get_user(attr->mq_curmsgs, &uattr->mq_curmsgs); -} - -static inline int put_compat_mq_attr(const struct mq_attr *attr, - struct compat_mq_attr __user *uattr) -{ - if (clear_user(uattr, sizeof *uattr)) - return -EFAULT; - - return __put_user(attr->mq_flags, &uattr->mq_flags) - | __put_user(attr->mq_maxmsg, &uattr->mq_maxmsg) - | __put_user(attr->mq_msgsize, &uattr->mq_msgsize) - | __put_user(attr->mq_curmsgs, &uattr->mq_curmsgs); -} - -COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name, - int, oflag, compat_mode_t, mode, - struct compat_mq_attr __user *, u_attr) -{ - void __user *p = NULL; - if (u_attr && oflag & O_CREAT) { - struct mq_attr attr; - - memset(&attr, 0, sizeof(attr)); - - p = compat_alloc_user_space(sizeof(attr)); - if (get_compat_mq_attr(&attr, u_attr) || - copy_to_user(p, &attr, sizeof(attr))) - return -EFAULT; - } - return sys_mq_open(u_name, oflag, mode, p); -} - -COMPAT_SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, - const char __user *, u_msg_ptr, - compat_size_t, msg_len, unsigned int, msg_prio, - const struct compat_timespec __user *, u_abs_timeout) -{ - struct timespec __user *u_ts; - - if (compat_convert_timespec(&u_ts, u_abs_timeout)) - return -EFAULT; - - return sys_mq_timedsend(mqdes, u_msg_ptr, msg_len, - msg_prio, u_ts); -} - -COMPAT_SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, - char __user *, u_msg_ptr, - compat_size_t, msg_len, unsigned int __user *, u_msg_prio, - const struct compat_timespec __user *, u_abs_timeout) -{ - struct timespec __user *u_ts; - - if (compat_convert_timespec(&u_ts, u_abs_timeout)) - return -EFAULT; - - return sys_mq_timedreceive(mqdes, u_msg_ptr, msg_len, - u_msg_prio, u_ts); -} - -COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes, - const struct compat_sigevent __user *, u_notification) -{ - struct sigevent __user *p = NULL; - if (u_notification) { - struct sigevent n; - p = compat_alloc_user_space(sizeof(*p)); - if (get_compat_sigevent(&n, u_notification)) - return -EFAULT; - if (n.sigev_notify == SIGEV_THREAD) - n.sigev_value.sival_ptr = compat_ptr(n.sigev_value.sival_int); - if (copy_to_user(p, &n, sizeof(*p))) - return -EFAULT; - } - return sys_mq_notify(mqdes, p); -} - -COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes, - const struct compat_mq_attr __user *, u_mqstat, - struct compat_mq_attr __user *, u_omqstat) -{ - struct mq_attr mqstat; - struct mq_attr __user *p = compat_alloc_user_space(2 * sizeof(*p)); - long ret; - - memset(&mqstat, 0, sizeof(mqstat)); - - if (u_mqstat) { - if (get_compat_mq_attr(&mqstat, u_mqstat) || - copy_to_user(p, &mqstat, sizeof(mqstat))) - return -EFAULT; - } - ret = sys_mq_getsetattr(mqdes, - u_mqstat ? p : NULL, - u_omqstat ? p + 1 : NULL); - if (ret) - return ret; - if (u_omqstat) { - if (copy_from_user(&mqstat, p + 1, sizeof(mqstat)) || - put_compat_mq_attr(&mqstat, u_omqstat)) - return -EFAULT; - } - return 0; -} |