From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/usb/gadget/legacy/mass_storage.c | 238 +++++++++++++++++++++++++++++++ 1 file changed, 238 insertions(+) create mode 100644 drivers/usb/gadget/legacy/mass_storage.c (limited to 'drivers/usb/gadget/legacy/mass_storage.c') diff --git a/drivers/usb/gadget/legacy/mass_storage.c b/drivers/usb/gadget/legacy/mass_storage.c new file mode 100644 index 000000000..ac1741126 --- /dev/null +++ b/drivers/usb/gadget/legacy/mass_storage.c @@ -0,0 +1,238 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * mass_storage.c -- Mass Storage USB Gadget + * + * Copyright (C) 2003-2008 Alan Stern + * Copyright (C) 2009 Samsung Electronics + * Author: Michal Nazarewicz + * All rights reserved. + */ + + +/* + * The Mass Storage Gadget acts as a USB Mass Storage device, + * appearing to the host as a disk drive or as a CD-ROM drive. In + * addition to providing an example of a genuinely useful gadget + * driver for a USB device, it also illustrates a technique of + * double-buffering for increased throughput. Last but not least, it + * gives an easy way to probe the behavior of the Mass Storage drivers + * in a USB host. + * + * Since this file serves only administrative purposes and all the + * business logic is implemented in f_mass_storage.* file. Read + * comments in this file for more detailed description. + */ + + +#include +#include +#include + +/*-------------------------------------------------------------------------*/ + +#define DRIVER_DESC "Mass Storage Gadget" +#define DRIVER_VERSION "2009/09/11" + +/* + * Thanks to NetChip Technologies for donating this product ID. + * + * DO NOT REUSE THESE IDs with any other driver!! Ever!! + * Instead: allocate your own, using normal USB-IF procedures. + */ +#define FSG_VENDOR_ID 0x0525 /* NetChip */ +#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */ + +#include "f_mass_storage.h" + +/*-------------------------------------------------------------------------*/ +USB_GADGET_COMPOSITE_OPTIONS(); + +static struct usb_device_descriptor msg_device_desc = { + .bLength = sizeof msg_device_desc, + .bDescriptorType = USB_DT_DEVICE, + + /* .bcdUSB = DYNAMIC */ + .bDeviceClass = USB_CLASS_PER_INTERFACE, + + /* Vendor and product id can be overridden by module parameters. */ + .idVendor = cpu_to_le16(FSG_VENDOR_ID), + .idProduct = cpu_to_le16(FSG_PRODUCT_ID), + .bNumConfigurations = 1, +}; + +static const struct usb_descriptor_header *otg_desc[2]; + +static struct usb_string strings_dev[] = { + [USB_GADGET_MANUFACTURER_IDX].s = "", + [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC, + [USB_GADGET_SERIAL_IDX].s = "", + { } /* end of list */ +}; + +static struct usb_gadget_strings stringtab_dev = { + .language = 0x0409, /* en-us */ + .strings = strings_dev, +}; + +static struct usb_gadget_strings *dev_strings[] = { + &stringtab_dev, + NULL, +}; + +static struct usb_function_instance *fi_msg; +static struct usb_function *f_msg; + +/****************************** Configurations ******************************/ + +static struct fsg_module_parameters mod_data = { + .stall = 1 +}; +#ifdef CONFIG_USB_GADGET_DEBUG_FILES + +static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS; + +#else + +/* + * Number of buffers we will use. + * 2 is usually enough for good buffering pipeline + */ +#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS + +#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ + +FSG_MODULE_PARAMETERS(/* no prefix */, mod_data); + +static int msg_do_config(struct usb_configuration *c) +{ + int ret; + + if (gadget_is_otg(c->cdev->gadget)) { + c->descriptors = otg_desc; + c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; + } + + f_msg = usb_get_function(fi_msg); + if (IS_ERR(f_msg)) + return PTR_ERR(f_msg); + + ret = usb_add_function(c, f_msg); + if (ret) + goto put_func; + + return 0; + +put_func: + usb_put_function(f_msg); + return ret; +} + +static struct usb_configuration msg_config_driver = { + .label = "Linux File-Backed Storage", + .bConfigurationValue = 1, + .bmAttributes = USB_CONFIG_ATT_SELFPOWER, +}; + + +/****************************** Gadget Bind ******************************/ + +static int msg_bind(struct usb_composite_dev *cdev) +{ + struct fsg_opts *opts; + struct fsg_config config; + int status; + + fi_msg = usb_get_function_instance("mass_storage"); + if (IS_ERR(fi_msg)) + return PTR_ERR(fi_msg); + + fsg_config_from_params(&config, &mod_data, fsg_num_buffers); + opts = fsg_opts_from_func_inst(fi_msg); + + opts->no_configfs = true; + status = fsg_common_set_num_buffers(opts->common, fsg_num_buffers); + if (status) + goto fail; + + status = fsg_common_set_cdev(opts->common, cdev, config.can_stall); + if (status) + goto fail_set_cdev; + + fsg_common_set_sysfs(opts->common, true); + status = fsg_common_create_luns(opts->common, &config); + if (status) + goto fail_set_cdev; + + fsg_common_set_inquiry_string(opts->common, config.vendor_name, + config.product_name); + + status = usb_string_ids_tab(cdev, strings_dev); + if (status < 0) + goto fail_string_ids; + msg_device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id; + + if (gadget_is_otg(cdev->gadget) && !otg_desc[0]) { + struct usb_descriptor_header *usb_desc; + + usb_desc = usb_otg_descriptor_alloc(cdev->gadget); + if (!usb_desc) { + status = -ENOMEM; + goto fail_string_ids; + } + usb_otg_descriptor_init(cdev->gadget, usb_desc); + otg_desc[0] = usb_desc; + otg_desc[1] = NULL; + } + + status = usb_add_config(cdev, &msg_config_driver, msg_do_config); + if (status < 0) + goto fail_otg_desc; + + usb_composite_overwrite_options(cdev, &coverwrite); + dev_info(&cdev->gadget->dev, + DRIVER_DESC ", version: " DRIVER_VERSION "\n"); + return 0; + +fail_otg_desc: + kfree(otg_desc[0]); + otg_desc[0] = NULL; +fail_string_ids: + fsg_common_remove_luns(opts->common); +fail_set_cdev: + fsg_common_free_buffers(opts->common); +fail: + usb_put_function_instance(fi_msg); + return status; +} + +static int msg_unbind(struct usb_composite_dev *cdev) +{ + if (!IS_ERR(f_msg)) + usb_put_function(f_msg); + + if (!IS_ERR(fi_msg)) + usb_put_function_instance(fi_msg); + + kfree(otg_desc[0]); + otg_desc[0] = NULL; + + return 0; +} + +/****************************** Some noise ******************************/ + +static struct usb_composite_driver msg_driver = { + .name = "g_mass_storage", + .dev = &msg_device_desc, + .max_speed = USB_SPEED_SUPER_PLUS, + .needs_serial = 1, + .strings = dev_strings, + .bind = msg_bind, + .unbind = msg_unbind, +}; + +module_usb_composite_driver(msg_driver); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Michal Nazarewicz"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3