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0f166bf1d6
Storing the end time seconds as 'unsigned long' can lead to truncation on 32-bit architectures if assigned from the 64-bit timespec64::tv_sec. As the select() core uses timespec64 consistently, also use that in the restart block. This also allows the simplification of the accessors. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://patch.msgid.link/20251223-restart-block-expiration-v2-1-8e33e5df7359@linutronix.de Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
62 lines
1.1 KiB
C
62 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Common syscall restarting data
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*/
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#ifndef __LINUX_RESTART_BLOCK_H
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#define __LINUX_RESTART_BLOCK_H
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#include <linux/compiler.h>
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#include <linux/time64.h>
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#include <linux/types.h>
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struct __kernel_timespec;
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struct timespec;
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struct old_timespec32;
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struct pollfd;
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enum timespec_type {
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TT_NONE = 0,
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TT_NATIVE = 1,
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TT_COMPAT = 2,
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};
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/*
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* System call restart block.
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*/
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struct restart_block {
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unsigned long arch_data;
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long (*fn)(struct restart_block *);
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union {
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/* For futex_wait() */
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struct {
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u32 __user *uaddr;
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u32 val;
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u32 flags;
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u32 bitset;
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ktime_t time;
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u32 __user *uaddr2;
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} futex;
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/* For nanosleep */
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struct {
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clockid_t clockid;
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enum timespec_type type;
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union {
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struct __kernel_timespec __user *rmtp;
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struct old_timespec32 __user *compat_rmtp;
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};
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ktime_t expires;
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} nanosleep;
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/* For poll */
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struct {
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struct pollfd __user *ufds;
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int nfds;
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int has_timeout;
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struct timespec64 end_time;
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} poll;
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};
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};
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extern long do_no_restart_syscall(struct restart_block *parm);
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#endif /* __LINUX_RESTART_BLOCK_H */
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