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a031c77dfc
Currently, changing the parameters of a DLCI gives no direct control to the user whether this should trigger a channel reset or not. The decision is solely made by the driver based on the assumption which parameter changes are compatible or not. Therefore, the user has no means to perform an automatic channel reset after parameter configuration for non-conflicting changes. Add the parameter 'flags' to 'gsm_dlci_config' to force a channel reset after ioctl setting regardless of whether the changes made require this or not by setting this to 'GSM_FL_RESTART'. Note that 'GSM_FL_RESTART' is currently the only allow flag to allow additions here. Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20230817093231.2317-1-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _LINUX_GSMMUX_H
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#define _LINUX_GSMMUX_H
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#include <linux/const.h>
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#include <linux/if.h>
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/*
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* flags definition for n_gsm
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*
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* Used by:
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* struct gsm_dlci_config.flags
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*/
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/* Forces a DLCI reset if set. Otherwise, a DLCI reset is only done if
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* incompatible settings were provided. Always cleared on retrieval.
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*/
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#define GSM_FL_RESTART _BITUL(0)
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struct gsm_config
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{
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unsigned int adaption;
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unsigned int encapsulation;
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unsigned int initiator;
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unsigned int t1;
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unsigned int t2;
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unsigned int t3;
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unsigned int n2;
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unsigned int mru;
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unsigned int mtu;
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unsigned int k;
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unsigned int i;
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unsigned int unused[8]; /* Can not be used */
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};
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#define GSMIOC_GETCONF _IOR('G', 0, struct gsm_config)
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#define GSMIOC_SETCONF _IOW('G', 1, struct gsm_config)
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struct gsm_netconfig {
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unsigned int adaption; /* Adaption to use in network mode */
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unsigned short protocol;/* Protocol to use - only ETH_P_IP supported */
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unsigned short unused2; /* Can not be used */
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char if_name[IFNAMSIZ]; /* interface name format string */
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__u8 unused[28]; /* Can not be used */
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};
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#define GSMIOC_ENABLE_NET _IOW('G', 2, struct gsm_netconfig)
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#define GSMIOC_DISABLE_NET _IO('G', 3)
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/* get the base tty number for a configured gsmmux tty */
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#define GSMIOC_GETFIRST _IOR('G', 4, __u32)
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struct gsm_config_ext {
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__u32 keep_alive; /* Control channel keep-alive in 1/100th of a
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* second (0 to disable)
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*/
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__u32 wait_config; /* Wait for DLCI config before opening virtual link? */
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__u32 reserved[6]; /* For future use, must be initialized to zero */
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};
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#define GSMIOC_GETCONF_EXT _IOR('G', 5, struct gsm_config_ext)
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#define GSMIOC_SETCONF_EXT _IOW('G', 6, struct gsm_config_ext)
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/* Set channel accordingly before calling GSMIOC_GETCONF_DLCI. */
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struct gsm_dlci_config {
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__u32 channel; /* DLCI (0 for the associated DLCI) */
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__u32 adaption; /* Convergence layer type */
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__u32 mtu; /* Maximum transfer unit */
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__u32 priority; /* Priority (0 for default value) */
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__u32 i; /* Frame type (1 = UIH, 2 = UI) */
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__u32 k; /* Window size (0 for default value) */
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__u32 flags; /* DLCI specific flags. */
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__u32 reserved[7]; /* For future use, must be initialized to zero */
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};
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#define GSMIOC_GETCONF_DLCI _IOWR('G', 7, struct gsm_dlci_config)
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#define GSMIOC_SETCONF_DLCI _IOW('G', 8, struct gsm_dlci_config)
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#endif
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