From 0f5cabba49021d36e9f76bd97d7fa0f4a408063f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 3 Jun 2008 07:39:16 -0700 Subject: [PATCH] wext: Create IW_REQUEST_FLAG_COMPAT and set it as needed. Now low-level WEXT ioctl handlers can do compat handling when necessary. Signed-off-by: David S. Miller --- include/net/iw_handler.h | 2 +- net/wireless/wext.c | 73 ++++++++++++++++++++++-------------------------- 2 files changed, 34 insertions(+), 41 deletions(-) diff --git a/include/net/iw_handler.h b/include/net/iw_handler.h index 369d50e..c99a8ee 100644 --- a/include/net/iw_handler.h +++ b/include/net/iw_handler.h @@ -256,7 +256,7 @@ #define EIWCOMMIT EINPROGRESS /* Flags available in struct iw_request_info */ -#define IW_REQUEST_FLAG_NONE 0x0000 /* No flag so far */ +#define IW_REQUEST_FLAG_COMPAT 0x0001 /* Compat ioctl call */ /* Type of headers we know about (basically union iwreq_data) */ #define IW_HEADER_TYPE_NULL 0 /* Not available */ diff --git a/net/wireless/wext.c b/net/wireless/wext.c index 1a4636a..273a843 100644 --- a/net/wireless/wext.c +++ b/net/wireless/wext.c @@ -834,10 +834,10 @@ out: static int ioctl_standard_call(struct net_device * dev, struct iwreq *iwr, unsigned int cmd, + struct iw_request_info *info, iw_handler handler) { const struct iw_ioctl_description * descr; - struct iw_request_info info; int ret = -EINVAL; /* Get the description of the IOCTL */ @@ -845,15 +845,11 @@ static int ioctl_standard_call(struct net_device * dev, return -EOPNOTSUPP; descr = &(standard_ioctl[cmd - SIOCIWFIRST]); - /* Prepare the call */ - info.cmd = cmd; - info.flags = 0; - /* Check if we have a pointer to user space data or not */ if (descr->header_type != IW_HEADER_TYPE_POINT) { /* No extra arguments. Trivial to handle */ - ret = handler(dev, &info, &(iwr->u), NULL); + ret = handler(dev, info, &(iwr->u), NULL); /* Generate an event to notify listeners of the change */ if ((descr->flags & IW_DESCR_FLAG_EVENT) && @@ -861,7 +857,7 @@ static int ioctl_standard_call(struct net_device * dev, wireless_send_event(dev, cmd, &(iwr->u), NULL); } else { ret = ioctl_standard_iw_point(&iwr->u.data, cmd, descr, - handler, dev, &info); + handler, dev, info); } /* Call commit handler if needed and defined */ @@ -984,25 +980,21 @@ out: } static int ioctl_private_call(struct net_device *dev, struct iwreq *iwr, - unsigned int cmd, iw_handler handler) + unsigned int cmd, struct iw_request_info *info, + iw_handler handler) { int extra_size = 0, ret = -EINVAL; const struct iw_priv_args *descr; - struct iw_request_info info; extra_size = get_priv_descr_and_size(dev, cmd, &descr); - /* Prepare the call */ - info.cmd = cmd; - info.flags = 0; - /* Check if we have a pointer to user space data or not. */ if (extra_size == 0) { /* No extra arguments. Trivial to handle */ - ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u)); + ret = handler(dev, info, &(iwr->u), (char *) &(iwr->u)); } else { ret = ioctl_private_iw_point(&iwr->u.data, cmd, descr, - handler, dev, &info, extra_size); + handler, dev, info, extra_size); } /* Call commit handler if needed and defined */ @@ -1014,7 +1006,8 @@ static int ioctl_private_call(struct net_device *dev, struct iwreq *iwr, /* ---------------------------------------------------------------- */ typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *, - unsigned int, iw_handler); + unsigned int, struct iw_request_info *, + iw_handler); /* * Main IOCTl dispatcher. @@ -1022,6 +1015,7 @@ typedef int (*wext_ioctl_func)(struct net_device *, struct iwreq *, */ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd, + struct iw_request_info *info, wext_ioctl_func standard, wext_ioctl_func private) { @@ -1040,11 +1034,11 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, * Note that 'cmd' is already filtered in dev_ioctl() with * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */ if (cmd == SIOCGIWSTATS) - return standard(dev, iwr, cmd, + return standard(dev, iwr, cmd, info, &iw_handler_get_iwstats); if (cmd == SIOCGIWPRIV && dev->wireless_handlers) - return standard(dev, iwr, cmd, + return standard(dev, iwr, cmd, info, &iw_handler_get_private); /* Basic check */ @@ -1056,9 +1050,9 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, if (handler) { /* Standard and private are not the same */ if (cmd < SIOCIWFIRSTPRIV) - return standard(dev, iwr, cmd, handler); + return standard(dev, iwr, cmd, info, handler); else - return private(dev, iwr, cmd, handler); + return private(dev, iwr, cmd, info, handler); } /* Old driver API : call driver ioctl handler */ if (dev->do_ioctl) @@ -1080,7 +1074,7 @@ static int wext_permission_check(unsigned int cmd) /* entry point from dev ioctl */ static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr, - unsigned int cmd, + unsigned int cmd, struct iw_request_info *info, wext_ioctl_func standard, wext_ioctl_func private) { @@ -1091,7 +1085,7 @@ static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr, dev_load(net, ifr->ifr_name); rtnl_lock(); - ret = wireless_process_ioctl(net, ifr, cmd, standard, private); + ret = wireless_process_ioctl(net, ifr, cmd, info, standard, private); rtnl_unlock(); return ret; @@ -1100,10 +1094,12 @@ static int wext_ioctl_dispatch(struct net *net, struct ifreq *ifr, int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd, void __user *arg) { - int ret = wext_ioctl_dispatch(net, ifr, cmd, - ioctl_standard_call, - ioctl_private_call); + struct iw_request_info info = { .cmd = cmd, .flags = 0 }; + int ret; + ret = wext_ioctl_dispatch(net, ifr, cmd, &info, + ioctl_standard_call, + ioctl_private_call); if (ret >= 0 && IW_IS_GET(cmd) && copy_to_user(arg, ifr, sizeof(struct iwreq))) @@ -1116,28 +1112,25 @@ int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd, static int compat_standard_call(struct net_device *dev, struct iwreq *iwr, unsigned int cmd, + struct iw_request_info *info, iw_handler handler) { const struct iw_ioctl_description *descr; struct compat_iw_point *iwp_compat; - struct iw_request_info info; struct iw_point iwp; int err; descr = standard_ioctl + (cmd - SIOCIWFIRST); if (descr->header_type != IW_HEADER_TYPE_POINT) - return ioctl_standard_call(dev, iwr, cmd, handler); + return ioctl_standard_call(dev, iwr, cmd, info, handler); iwp_compat = (struct compat_iw_point *) &iwr->u.data; iwp.pointer = compat_ptr(iwp_compat->pointer); iwp.length = iwp_compat->length; iwp.flags = iwp_compat->flags; - info.cmd = cmd; - info.flags = 0; - - err = ioctl_standard_iw_point(&iwp, cmd, descr, handler, dev, &info); + err = ioctl_standard_iw_point(&iwp, cmd, descr, handler, dev, info); iwp_compat->pointer = ptr_to_compat(iwp.pointer); iwp_compat->length = iwp.length; @@ -1147,22 +1140,18 @@ static int compat_standard_call(struct net_device *dev, } static int compat_private_call(struct net_device *dev, struct iwreq *iwr, - unsigned int cmd, iw_handler handler) + unsigned int cmd, struct iw_request_info *info, + iw_handler handler) { const struct iw_priv_args *descr; - struct iw_request_info info; int ret, extra_size; extra_size = get_priv_descr_and_size(dev, cmd, &descr); - /* Prepare the call */ - info.cmd = cmd; - info.flags = 0; - /* Check if we have a pointer to user space data or not. */ if (extra_size == 0) { /* No extra arguments. Trivial to handle */ - ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u)); + ret = handler(dev, info, &(iwr->u), (char *) &(iwr->u)); } else { struct compat_iw_point *iwp_compat; struct iw_point iwp; @@ -1173,7 +1162,7 @@ static int compat_private_call(struct net_device *dev, struct iwreq *iwr, iwp.flags = iwp_compat->flags; ret = ioctl_private_iw_point(&iwp, cmd, descr, - handler, dev, &info, extra_size); + handler, dev, info, extra_size); iwp_compat->pointer = ptr_to_compat(iwp.pointer); iwp_compat->length = iwp.length; @@ -1191,6 +1180,7 @@ int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, unsigned long arg) { void __user *argp = (void __user *)arg; + struct iw_request_info info; struct iwreq iwr; char *colon; int ret; @@ -1203,7 +1193,10 @@ int compat_wext_handle_ioctl(struct net *net, unsigned int cmd, if (colon) *colon = 0; - ret = wext_ioctl_dispatch(net, (struct ifreq *) &iwr, cmd, + info.cmd = cmd; + info.flags = IW_REQUEST_FLAG_COMPAT; + + ret = wext_ioctl_dispatch(net, (struct ifreq *) &iwr, cmd, &info, compat_standard_call, compat_private_call); -- 2.7.4