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f78e4681ef
In version 6.15 the Linux kernel started checking write access on the PHC file descriptor in the PTP_PIN_SETFUNC and PTP_EXTTS_REQUEST ioctls. chronyd opened the PHC device as readonly, which caused the PHC refclock driver configured with the extpps option to fail with the "Could not enable external PHC timestamping" error message. To ensure compatibility with new kernel versions, add flags to the SYS_Linux_OpenPHC() function and open the device with the O_RDWR flag when the extpps option is enabled.
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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The header file for the linux driver
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*/
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#ifndef GOT_SYS_LINUX_H
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#define GOT_SYS_LINUX_H
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#include "sys.h"
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extern void SYS_Linux_Initialise(void);
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extern void SYS_Linux_Finalise(void);
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extern void SYS_Linux_DropRoot(uid_t uid, gid_t gid, SYS_ProcessContext context, int clock_control);
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extern void SYS_Linux_EnableSystemCallFilter(int level, SYS_ProcessContext context);
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extern int SYS_Linux_CheckKernelVersion(int req_major, int req_minor);
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extern int SYS_Linux_OpenPHC(const char *device, int flags);
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extern int SYS_Linux_GetPHCReadings(int fd, int nocrossts, int *reading_mode, int max_readings,
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struct timespec tss[][3]);
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extern int SYS_Linux_SetPHCExtTimestamping(int fd, int pin, int channel,
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int rising, int falling, int enable);
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extern int SYS_Linux_ReadPHCExtTimestamp(int fd, struct timespec *phc_ts, int *channel);
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#endif /* GOT_SYS_LINUX_H */
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