From 73d74f61a559d8fc2266abfb95085bb7d1917a3e Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 27 Jul 2021 15:45:10 +0200 Subject: wan: use ndo_siocdevprivate The wan drivers each support some custom SIOCDEVPRIVATE ioctls, plus the common SIOCWANDEV command. Split these so the ioctl callback only deals with SIOCWANDEV and the rest is handled by ndo_siocdevprivate. It might make sense to also split out SIOCWANDEV into a separate callback in order to eventually remove ndo_do_ioctl entirely. Cc: Krzysztof Halasa Cc: Kevin Curtis Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- drivers/net/wan/farsync.c | 39 +++++++++++++++++++++++++++++---------- 1 file changed, 29 insertions(+), 10 deletions(-) (limited to 'drivers/net/wan/farsync.c') diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c index b3466e084e84..d0e3cab98645 100644 --- a/drivers/net/wan/farsync.c +++ b/drivers/net/wan/farsync.c @@ -1909,7 +1909,7 @@ fst_get_iface(struct fst_card_info *card, struct fst_port_info *port, } static int -fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +fst_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd) { struct fst_card_info *card; struct fst_port_info *port; @@ -1918,7 +1918,7 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) unsigned long flags; void *buf; - dbg(DBG_IOCTL, "ioctl: %x, %p\n", cmd, ifr->ifr_data); + dbg(DBG_IOCTL, "ioctl: %x, %p\n", cmd, data); port = dev_to_port(dev); card = port->card; @@ -1942,11 +1942,10 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /* First copy in the header with the length and offset of data * to write */ - if (!ifr->ifr_data) + if (!data) return -EINVAL; - if (copy_from_user(&wrthdr, ifr->ifr_data, - sizeof(struct fstioc_write))) + if (copy_from_user(&wrthdr, data, sizeof(struct fstioc_write))) return -EFAULT; /* Sanity check the parameters. We don't support partial writes @@ -1958,7 +1957,7 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /* Now copy the data to the card. */ - buf = memdup_user(ifr->ifr_data + sizeof(struct fstioc_write), + buf = memdup_user(data + sizeof(struct fstioc_write), wrthdr.size); if (IS_ERR(buf)) return PTR_ERR(buf); @@ -1991,12 +1990,12 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) } } - if (!ifr->ifr_data) + if (!data) return -EINVAL; gather_conf_info(card, port, &info); - if (copy_to_user(ifr->ifr_data, &info, sizeof(info))) + if (copy_to_user(data, &info, sizeof(info))) return -EFAULT; return 0; @@ -2011,11 +2010,30 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) card->card_no, card->state); return -EIO; } - if (copy_from_user(&info, ifr->ifr_data, sizeof(info))) + if (copy_from_user(&info, data, sizeof(info))) return -EFAULT; return set_conf_from_info(card, port, &info); + default: + return -EINVAL; + } +} +static int +fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct fst_card_info *card; + struct fst_port_info *port; + + dbg(DBG_IOCTL, "ioctl: %x, %x\n", cmd, ifr->ifr_settings.type); + + port = dev_to_port(dev); + card = port->card; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + switch (cmd) { case SIOCWANDEV: switch (ifr->ifr_settings.type) { case IF_GET_IFACE: @@ -2310,7 +2328,8 @@ static const struct net_device_ops fst_ops = { .ndo_open = fst_open, .ndo_stop = fst_close, .ndo_start_xmit = hdlc_start_xmit, - .ndo_do_ioctl = fst_ioctl, + .ndo_do_ioctl = fst_ioctl, + .ndo_siocdevprivate = fst_siocdevprivate, .ndo_tx_timeout = fst_tx_timeout, }; -- cgit From ad7eab2ab014748b062507b7ac69f8e856057717 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 27 Jul 2021 15:45:14 +0200 Subject: net: split out ndo_siowandev ioctl In order to further reduce the scope of ndo_do_ioctl(), move out the SIOCWANDEV handling into a new network device operation function. Adjust the prototype to only pass the if_settings sub-structure in place of the ifreq, and remove the redundant 'cmd' argument in the process. Cc: Krzysztof Halasa Cc: "Jan \"Yenya\" Kasprzak" Cc: Kevin Curtis Cc: Zhao Qiang Cc: Martin Schiller Cc: Jiri Slaby Cc: linux-x25@vger.kernel.org Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- drivers/net/wan/farsync.c | 92 ++++++++++++++++++++++------------------------- 1 file changed, 42 insertions(+), 50 deletions(-) (limited to 'drivers/net/wan/farsync.c') diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c index d0e3cab98645..6a212c085435 100644 --- a/drivers/net/wan/farsync.c +++ b/drivers/net/wan/farsync.c @@ -1784,16 +1784,15 @@ gather_conf_info(struct fst_card_info *card, struct fst_port_info *port, static int fst_set_iface(struct fst_card_info *card, struct fst_port_info *port, - struct ifreq *ifr) + struct if_settings *ifs) { sync_serial_settings sync; int i; - if (ifr->ifr_settings.size != sizeof(sync)) + if (ifs->size != sizeof(sync)) return -ENOMEM; - if (copy_from_user - (&sync, ifr->ifr_settings.ifs_ifsu.sync, sizeof(sync))) + if (copy_from_user(&sync, ifs->ifs_ifsu.sync, sizeof(sync))) return -EFAULT; if (sync.loopback) @@ -1801,7 +1800,7 @@ fst_set_iface(struct fst_card_info *card, struct fst_port_info *port, i = port->index; - switch (ifr->ifr_settings.type) { + switch (ifs->type) { case IF_IFACE_V35: FST_WRW(card, portConfig[i].lineInterface, V35); port->hwif = V35; @@ -1857,7 +1856,7 @@ fst_set_iface(struct fst_card_info *card, struct fst_port_info *port, static int fst_get_iface(struct fst_card_info *card, struct fst_port_info *port, - struct ifreq *ifr) + struct if_settings *ifs) { sync_serial_settings sync; int i; @@ -1868,29 +1867,29 @@ fst_get_iface(struct fst_card_info *card, struct fst_port_info *port, */ switch (port->hwif) { case E1: - ifr->ifr_settings.type = IF_IFACE_E1; + ifs->type = IF_IFACE_E1; break; case T1: - ifr->ifr_settings.type = IF_IFACE_T1; + ifs->type = IF_IFACE_T1; break; case V35: - ifr->ifr_settings.type = IF_IFACE_V35; + ifs->type = IF_IFACE_V35; break; case V24: - ifr->ifr_settings.type = IF_IFACE_V24; + ifs->type = IF_IFACE_V24; break; case X21D: - ifr->ifr_settings.type = IF_IFACE_X21D; + ifs->type = IF_IFACE_X21D; break; case X21: default: - ifr->ifr_settings.type = IF_IFACE_X21; + ifs->type = IF_IFACE_X21; break; } - if (ifr->ifr_settings.size == 0) + if (!ifs->size) return 0; /* only type requested */ - if (ifr->ifr_settings.size < sizeof(sync)) + if (ifs->size < sizeof(sync)) return -ENOMEM; i = port->index; @@ -1901,10 +1900,10 @@ fst_get_iface(struct fst_card_info *card, struct fst_port_info *port, INTCLK ? CLOCK_INT : CLOCK_EXT; sync.loopback = 0; - if (copy_to_user(ifr->ifr_settings.ifs_ifsu.sync, &sync, sizeof(sync))) + if (copy_to_user(ifs->ifs_ifsu.sync, &sync, sizeof(sync))) return -EFAULT; - ifr->ifr_settings.size = sizeof(sync); + ifs->size = sizeof(sync); return 0; } @@ -2020,12 +2019,12 @@ fst_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, } static int -fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +fst_ioctl(struct net_device *dev, struct if_settings *ifs) { struct fst_card_info *card; struct fst_port_info *port; - dbg(DBG_IOCTL, "ioctl: %x, %x\n", cmd, ifr->ifr_settings.type); + dbg(DBG_IOCTL, "SIOCDEVPRIVATE, %x\n", ifs->type); port = dev_to_port(dev); card = port->card; @@ -2033,42 +2032,35 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) if (!capable(CAP_NET_ADMIN)) return -EPERM; - switch (cmd) { - case SIOCWANDEV: - switch (ifr->ifr_settings.type) { - case IF_GET_IFACE: - return fst_get_iface(card, port, ifr); - - case IF_IFACE_SYNC_SERIAL: - case IF_IFACE_V35: - case IF_IFACE_V24: - case IF_IFACE_X21: - case IF_IFACE_X21D: - case IF_IFACE_T1: - case IF_IFACE_E1: - return fst_set_iface(card, port, ifr); - - case IF_PROTO_RAW: - port->mode = FST_RAW; - return 0; + switch (ifs->type) { + case IF_GET_IFACE: + return fst_get_iface(card, port, ifs); - case IF_GET_PROTO: - if (port->mode == FST_RAW) { - ifr->ifr_settings.type = IF_PROTO_RAW; - return 0; - } - return hdlc_ioctl(dev, ifr, cmd); + case IF_IFACE_SYNC_SERIAL: + case IF_IFACE_V35: + case IF_IFACE_V24: + case IF_IFACE_X21: + case IF_IFACE_X21D: + case IF_IFACE_T1: + case IF_IFACE_E1: + return fst_set_iface(card, port, ifs); - default: - port->mode = FST_GEN_HDLC; - dbg(DBG_IOCTL, "Passing this type to hdlc %x\n", - ifr->ifr_settings.type); - return hdlc_ioctl(dev, ifr, cmd); + case IF_PROTO_RAW: + port->mode = FST_RAW; + return 0; + + case IF_GET_PROTO: + if (port->mode == FST_RAW) { + ifs->type = IF_PROTO_RAW; + return 0; } + return hdlc_ioctl(dev, ifs); default: - /* Not one of ours. Pass through to HDLC package */ - return hdlc_ioctl(dev, ifr, cmd); + port->mode = FST_GEN_HDLC; + dbg(DBG_IOCTL, "Passing this type to hdlc %x\n", + ifs->type); + return hdlc_ioctl(dev, ifs); } } @@ -2328,7 +2320,7 @@ static const struct net_device_ops fst_ops = { .ndo_open = fst_open, .ndo_stop = fst_close, .ndo_start_xmit = hdlc_start_xmit, - .ndo_do_ioctl = fst_ioctl, + .ndo_siocwandev = fst_ioctl, .ndo_siocdevprivate = fst_siocdevprivate, .ndo_tx_timeout = fst_tx_timeout, }; -- cgit