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/md/dm-init.c | 323 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 323 insertions(+) create mode 100644 drivers/md/dm-init.c (limited to 'drivers/md/dm-init.c') diff --git a/drivers/md/dm-init.c b/drivers/md/dm-init.c new file mode 100644 index 000000000..dc4381d68 --- /dev/null +++ b/drivers/md/dm-init.c @@ -0,0 +1,323 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * dm-init.c + * Copyright (C) 2017 The Chromium OS Authors + * + * This file is released under the GPLv2. + */ + +#include +#include +#include +#include +#include +#include +#include + +#define DM_MSG_PREFIX "init" +#define DM_MAX_DEVICES 256 +#define DM_MAX_TARGETS 256 +#define DM_MAX_STR_SIZE 4096 +#define DM_MAX_WAITFOR 256 + +static char *create; + +static char *waitfor[DM_MAX_WAITFOR]; + +/* + * Format: dm-mod.create=,,,,[,
+][;,,,,
[,
+]+] + * Table format: + * Block devices to wait for to become available before setting up tables: + * dm-mod.waitfor=[,..,] + * + * See Documentation/admin-guide/device-mapper/dm-init.rst for dm-mod.create="..." format + * details. + */ + +struct dm_device { + struct dm_ioctl dmi; + struct dm_target_spec *table[DM_MAX_TARGETS]; + char *target_args_array[DM_MAX_TARGETS]; + struct list_head list; +}; + +static const char * const dm_allowed_targets[] __initconst = { + "crypt", + "delay", + "linear", + "snapshot-origin", + "striped", + "verity", +}; + +static int __init dm_verify_target_type(const char *target) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(dm_allowed_targets); i++) { + if (!strcmp(dm_allowed_targets[i], target)) + return 0; + } + return -EINVAL; +} + +static void __init dm_setup_cleanup(struct list_head *devices) +{ + struct dm_device *dev, *tmp; + unsigned int i; + + list_for_each_entry_safe(dev, tmp, devices, list) { + list_del(&dev->list); + for (i = 0; i < dev->dmi.target_count; i++) { + kfree(dev->table[i]); + kfree(dev->target_args_array[i]); + } + kfree(dev); + } +} + +/** + * str_field_delimit - delimit a string based on a separator char. + * @str: the pointer to the string to delimit. + * @separator: char that delimits the field + * + * Find a @separator and replace it by '\0'. + * Remove leading and trailing spaces. + * Return the remainder string after the @separator. + */ +static char __init *str_field_delimit(char **str, char separator) +{ + char *s; + + /* TODO: add support for escaped characters */ + *str = skip_spaces(*str); + s = strchr(*str, separator); + /* Delimit the field and remove trailing spaces */ + if (s) + *s = '\0'; + *str = strim(*str); + return s ? ++s : NULL; +} + +/** + * dm_parse_table_entry - parse a table entry + * @dev: device to store the parsed information. + * @str: the pointer to a string with the format: + * [, ...] + * + * Return the remainder string after the table entry, i.e, after the comma which + * delimits the entry or NULL if reached the end of the string. + */ +static char __init *dm_parse_table_entry(struct dm_device *dev, char *str) +{ + const unsigned int n = dev->dmi.target_count - 1; + struct dm_target_spec *sp; + unsigned int i; + /* fields: */ + char *field[4]; + char *next; + + field[0] = str; + /* Delimit first 3 fields that are separated by space */ + for (i = 0; i < ARRAY_SIZE(field) - 1; i++) { + field[i + 1] = str_field_delimit(&field[i], ' '); + if (!field[i + 1]) + return ERR_PTR(-EINVAL); + } + /* Delimit last field that can be terminated by comma */ + next = str_field_delimit(&field[i], ','); + + sp = kzalloc(sizeof(*sp), GFP_KERNEL); + if (!sp) + return ERR_PTR(-ENOMEM); + dev->table[n] = sp; + + /* start_sector */ + if (kstrtoull(field[0], 0, &sp->sector_start)) + return ERR_PTR(-EINVAL); + /* num_sector */ + if (kstrtoull(field[1], 0, &sp->length)) + return ERR_PTR(-EINVAL); + /* target_type */ + strscpy(sp->target_type, field[2], sizeof(sp->target_type)); + if (dm_verify_target_type(sp->target_type)) { + DMERR("invalid type \"%s\"", sp->target_type); + return ERR_PTR(-EINVAL); + } + /* target_args */ + dev->target_args_array[n] = kstrndup(field[3], DM_MAX_STR_SIZE, + GFP_KERNEL); + if (!dev->target_args_array[n]) + return ERR_PTR(-ENOMEM); + + return next; +} + +/** + * dm_parse_table - parse "dm-mod.create=" table field + * @dev: device to store the parsed information. + * @str: the pointer to a string with the format: + *
[,
+] + */ +static int __init dm_parse_table(struct dm_device *dev, char *str) +{ + char *table_entry = str; + + while (table_entry) { + DMDEBUG("parsing table \"%s\"", str); + if (++dev->dmi.target_count > DM_MAX_TARGETS) { + DMERR("too many targets %u > %d", + dev->dmi.target_count, DM_MAX_TARGETS); + return -EINVAL; + } + table_entry = dm_parse_table_entry(dev, table_entry); + if (IS_ERR(table_entry)) { + DMERR("couldn't parse table"); + return PTR_ERR(table_entry); + } + } + + return 0; +} + +/** + * dm_parse_device_entry - parse a device entry + * @dev: device to store the parsed information. + * @str: the pointer to a string with the format: + * name,uuid,minor,flags,table[; ...] + * + * Return the remainder string after the table entry, i.e, after the semi-colon + * which delimits the entry or NULL if reached the end of the string. + */ +static char __init *dm_parse_device_entry(struct dm_device *dev, char *str) +{ + /* There are 5 fields: name,uuid,minor,flags,table; */ + char *field[5]; + unsigned int i; + char *next; + + field[0] = str; + /* Delimit first 4 fields that are separated by comma */ + for (i = 0; i < ARRAY_SIZE(field) - 1; i++) { + field[i+1] = str_field_delimit(&field[i], ','); + if (!field[i+1]) + return ERR_PTR(-EINVAL); + } + /* Delimit last field that can be delimited by semi-colon */ + next = str_field_delimit(&field[i], ';'); + + /* name */ + strscpy(dev->dmi.name, field[0], sizeof(dev->dmi.name)); + /* uuid */ + strscpy(dev->dmi.uuid, field[1], sizeof(dev->dmi.uuid)); + /* minor */ + if (strlen(field[2])) { + if (kstrtoull(field[2], 0, &dev->dmi.dev)) + return ERR_PTR(-EINVAL); + dev->dmi.flags |= DM_PERSISTENT_DEV_FLAG; + } + /* flags */ + if (!strcmp(field[3], "ro")) + dev->dmi.flags |= DM_READONLY_FLAG; + else if (strcmp(field[3], "rw")) + return ERR_PTR(-EINVAL); + /* table */ + if (dm_parse_table(dev, field[4])) + return ERR_PTR(-EINVAL); + + return next; +} + +/** + * dm_parse_devices - parse "dm-mod.create=" argument + * @devices: list of struct dm_device to store the parsed information. + * @str: the pointer to a string with the format: + * [;+] + */ +static int __init dm_parse_devices(struct list_head *devices, char *str) +{ + unsigned long ndev = 0; + struct dm_device *dev; + char *device = str; + + DMDEBUG("parsing \"%s\"", str); + while (device) { + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + list_add_tail(&dev->list, devices); + + if (++ndev > DM_MAX_DEVICES) { + DMERR("too many devices %lu > %d", + ndev, DM_MAX_DEVICES); + return -EINVAL; + } + + device = dm_parse_device_entry(dev, device); + if (IS_ERR(device)) { + DMERR("couldn't parse device"); + return PTR_ERR(device); + } + } + + return 0; +} + +/** + * dm_init_init - parse "dm-mod.create=" argument and configure drivers + */ +static int __init dm_init_init(void) +{ + struct dm_device *dev; + LIST_HEAD(devices); + char *str; + int i, r; + + if (!create) + return 0; + + if (strlen(create) >= DM_MAX_STR_SIZE) { + DMERR("Argument is too big. Limit is %d", DM_MAX_STR_SIZE); + return -EINVAL; + } + str = kstrndup(create, DM_MAX_STR_SIZE, GFP_KERNEL); + if (!str) + return -ENOMEM; + + r = dm_parse_devices(&devices, str); + if (r) + goto out; + + DMINFO("waiting for all devices to be available before creating mapped devices"); + wait_for_device_probe(); + + for (i = 0; i < ARRAY_SIZE(waitfor); i++) { + if (waitfor[i]) { + DMINFO("waiting for device %s ...", waitfor[i]); + while (!dm_get_dev_t(waitfor[i])) + msleep(5); + } + } + + if (waitfor[0]) + DMINFO("all devices available"); + + list_for_each_entry(dev, &devices, list) { + if (dm_early_create(&dev->dmi, dev->table, + dev->target_args_array)) + break; + } +out: + kfree(str); + dm_setup_cleanup(&devices); + return r; +} + +late_initcall(dm_init_init); + +module_param(create, charp, 0); +MODULE_PARM_DESC(create, "Create a mapped device in early boot"); + +module_param_array(waitfor, charp, NULL, 0); +MODULE_PARM_DESC(waitfor, "Devices to wait for before setting up tables"); -- cgit v1.2.3