kernel/git/stable/linux.git/net/atm/ioctl.c, branch linux-7.2.y

atm: remove orphaned uAPI for deleted drivers, protocols and SVCs

2026-06-16T15:53:53+00:00

ATM removals have left a number of uAPI headers and ioctl definitions with no in-kernel implementation behind them: - device headers for adapters deleted with the legacy PCI/SBUS drivers: atm_eni.h, atm_he.h, atm_idt77105.h, atm_nicstar.h, atm_zatm.h and the atmtcp pair atm_tcp.h / - protocol headers for the removed CLIP, LANE and MPOA stacks: atmarp.h, atmclip.h, atmlec.h, atmmpc.h - atmsvc.h and the SVC / p2mp / local-address ioctls in atmdev.h (ATM_{GET,RST,ADD,DEL}ADDR, ATM_{ADD,DEL,GET}LECSADDR, ATM_{ADD,DROP}PARTY) left behind by the SVC and address-registry removals None of these are referenced by any remaining in-tree code. Let's try to delete all this. Chances are nobody cares about these headers any more. I'm keeping this separate from the kernel side code changes for ease of revert, in case I am proven wrong... Link: https://patch.msgid.link/20260615194416.752559-10-kuba@kernel.org Signed-off-by: Jakub Kicinski

atm: remove SVC socket support and the signaling daemon interface

2026-06-16T15:53:52+00:00

ATM switched virtual circuits (SVCs) are set up and torn down by a user-space signaling daemon (atmsigd) which the kernel talks to over a dedicated "sigd" socket: the kernel marshals Q.2931-style requests (as_connect, as_listen, as_accept, as_close, ...) to the daemon and applies the results to PF_ATMSVC sockets. This is the machinery behind classical SVC use and was the foundation for LANE / MPOA, all of which have been removed. DSL deployments do not use any of this. PPPoATM and BR2684 run over permanent virtual circuits (PF_ATMPVC) with a statically configured VPI/VCI; no atmsigd, no Q.2931. Neither remaining ATM driver (solos-pci, the USB DSL modems) is reachable through the SVC path. Remove the SVC socket family and the signaling interface: - delete net/atm/svc.c, net/atm/signaling.c and signaling.h - drop atmsvc_init()/atmsvc_exit() and the PF_ATMSVC registration and module alias - drop the ATMSIGD_CTRL ioctl (sigd_attach) and the /proc/net/atm/svc file - fold the SVC branch out of atm_change_qos(); all sockets are PVCs now The obsolete ATM_SETSC ioctl stub is left in place (it already just warns and returns 0), as is the struct atm_vcc SVC bookkeeping shared with the queueing layer. Link: https://patch.msgid.link/20260615194416.752559-6-kuba@kernel.org Signed-off-by: Jakub Kicinski

atm: remove the local ATM (NSAP) address registry

2026-06-16T15:53:52+00:00

net/atm/addr.c maintained the per-device lists of local NSAP addresses (dev->local) and ILMI-learned LECS addresses (dev->lecs). These exist solely to serve SVC signaling: the lists are populated through the ATM_{ADD,DEL,RST}ADDR / ATM_{ADD,DEL,GET}LECSADDR ioctls used by the atmsigd / ILMI daemons, and consumed when registering addresses with the signaling daemon. The LECS list belonged to LAN Emulation, which has been removed. With no SVC users in a DSL-only configuration these lists are always empty, so drop the registry entirely: - remove the ADDR/LECSADDR/RSTADDR ioctls - drop the now-always-empty "atmaddress" sysfs attribute - remove the dev->local / dev->lecs lists, structs and enums - delete net/atm/addr.c and net/atm/addr.h The device ESI ("MAC" address) and its ATM_{G,S}ETESI ioctls and "address" sysfs attribute are retained - the USB DSL modems populate the ESI. Link: https://patch.msgid.link/20260615194416.752559-5-kuba@kernel.org Signed-off-by: Jakub Kicinski

atm: remove dead SONET PHY ioctls

2026-06-16T15:53:52+00:00

The SONET_* ioctls are SONET/SDH PHY controls that atm_dev_ioctl() and the compat path only ever forwarded to the driver's ->ioctl() handler. The PHY drivers that implemented them (the S/UNI library and the framers on the removed PCI/SBUS adapters) are gone, and neither surviving driver services them: solos-pci has no ->ioctl, and usbatm handles only ATM_QUERYLOOP. They now uniformly return an error regardless. Drop the SONET compat passthrough and the SONET cases in atm_dev_ioctl(), along with the now-unused linux/sonet.h includes. The SONET_* uAPI definitions are untouched. Link: https://patch.msgid.link/20260615194416.752559-4-kuba@kernel.org Signed-off-by: Jakub Kicinski

net: remove unused ATM protocols and legacy ATM device drivers

2026-04-23T19:21:14+00:00

Remove the ATM protocol modules and PCI/SBUS ATM device drivers that are no longer in active use. The ATM core protocol stack, PPPoATM, BR2684, and USB DSL modem drivers (drivers/usb/atm/) are retained in-tree to maintain PPP over ATM (PPPoA) and PPPoE-over-BR2684 support for DSL connections. The Solos ADSL2+ PCI driver is also retained. Removed ATM protocol modules: - net/atm/clip.c - Classical IP over ATM (RFC 2225) - net/atm/lec.c - LAN Emulation Client (LANE) - net/atm/mpc.c, mpoa_caches.c, mpoa_proc.c - Multi-Protocol Over ATM Removed PCI/SBUS ATM device drivers (drivers/atm/): - adummy, atmtcp - software/testing ATM devices - eni - Efficient Networks ENI155P (OC-3, ~1995) - fore200e - FORE Systems 200E PCI/SBUS (OC-3, ~1999) - he - ForeRunner HE (OC-3/OC-12, ~2000) - idt77105 - IDT 77105 25 Mbps ATM PHY - idt77252 - IDT 77252 NICStAR II (OC-3, ~2000) - iphase - Interphase ATM PCI (OC-3/DS3/E3) - lanai - Efficient Networks Speedstream 3010 - nicstar - IDT 77201 NICStAR (155/25 Mbps, ~1999) - suni - PMC S/UNI SONET PHY library Also clean up references in: - net/bridge/ - remove ATM LANE hook (br_fdb_test_addr_hook, br_fdb_test_addr) - net/core/dev.c - remove br_fdb_test_addr_hook export - defconfig files - remove ATM driver config options The removed code is moved to an out-of-tree module package (mod-orphan). Acked-by: Andy Shevchenko Reviewed-by: Simon Horman Reviewed-by: Nikolay Aleksandrov Link: https://patch.msgid.link/20260422041846.2035118-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

atm: clean up a put_user() calls

2024-06-15T02:08:50+00:00

Unlike copy_from_user(), put_user() and get_user() return -EFAULT on error. Use the error code directly instead of setting it. Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/04a018e8-7433-4f67-8ddd-9357a0114f87@moroto.mountain Signed-off-by: Jakub Kicinski

atm: Fix Use-After-Free in do_vcc_ioctl

2023-12-12T12:14:08+00:00

Because do_vcc_ioctl() accesses sk->sk_receive_queue without holding a sk->sk_receive_queue.lock, it can cause a race with vcc_recvmsg(). A use-after-free for skb occurs with the following flow. ``` do_vcc_ioctl() -> skb_peek() vcc_recvmsg() -> skb_recv_datagram() -> skb_free_datagram() ``` Add sk->sk_receive_queue.lock to do_vcc_ioctl() to fix this issue. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Hyunwoo Kim Link: https://lore.kernel.org/r/20231209094210.GA403126@v4bel-B760M-AORUS-ELITE-AX Signed-off-by: Paolo Abeni

atm: switch do_atmif_sioc() to direct use of atm_dev_ioctl()

2020-05-21T00:31:36+00:00

Signed-off-by: Al Viro

atm: lift copyin from atm_dev_ioctl()

2020-05-21T00:31:35+00:00

Signed-off-by: Al Viro

atm: switch do_atm_iobuf() to direct use of atm_getnames()

2020-05-21T00:31:35+00:00

... and sod the compat_alloc_user_space() with its complications Signed-off-by: Al Viro