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/scsi/scsi_common.c | 358 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 358 insertions(+) create mode 100644 drivers/scsi/scsi_common.c (limited to 'drivers/scsi/scsi_common.c') diff --git a/drivers/scsi/scsi_common.c b/drivers/scsi/scsi_common.c new file mode 100644 index 000000000..6e50e81a8 --- /dev/null +++ b/drivers/scsi/scsi_common.c @@ -0,0 +1,358 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SCSI functions used by both the initiator and the target code. + */ + +#include +#include +#include +#include +#include +#include +#include + +MODULE_LICENSE("GPL v2"); + +/* Command group 3 is reserved and should never be used. */ +const unsigned char scsi_command_size_tbl[8] = { + 6, 10, 10, 12, 16, 12, 10, 10 +}; +EXPORT_SYMBOL(scsi_command_size_tbl); + +/* NB: These are exposed through /proc/scsi/scsi and form part of the ABI. + * You may not alter any existing entry (although adding new ones is + * encouraged once assigned by ANSI/INCITS T10). + */ +static const char *const scsi_device_types[] = { + "Direct-Access ", + "Sequential-Access", + "Printer ", + "Processor ", + "WORM ", + "CD-ROM ", + "Scanner ", + "Optical Device ", + "Medium Changer ", + "Communications ", + "ASC IT8 ", + "ASC IT8 ", + "RAID ", + "Enclosure ", + "Direct-Access-RBC", + "Optical card ", + "Bridge controller", + "Object storage ", + "Automation/Drive ", + "Security Manager ", + "Direct-Access-ZBC", +}; + +/** + * scsi_device_type - Return 17-char string indicating device type. + * @type: type number to look up + */ +const char *scsi_device_type(unsigned type) +{ + if (type == 0x1e) + return "Well-known LUN "; + if (type == 0x1f) + return "No Device "; + if (type >= ARRAY_SIZE(scsi_device_types)) + return "Unknown "; + return scsi_device_types[type]; +} +EXPORT_SYMBOL(scsi_device_type); + +/** + * scsilun_to_int - convert a scsi_lun to an int + * @scsilun: struct scsi_lun to be converted. + * + * Description: + * Convert @scsilun from a struct scsi_lun to a four-byte host byte-ordered + * integer, and return the result. The caller must check for + * truncation before using this function. + * + * Notes: + * For a description of the LUN format, post SCSI-3 see the SCSI + * Architecture Model, for SCSI-3 see the SCSI Controller Commands. + * + * Given a struct scsi_lun of: d2 04 0b 03 00 00 00 00, this function + * returns the integer: 0x0b03d204 + * + * This encoding will return a standard integer LUN for LUNs smaller + * than 256, which typically use a single level LUN structure with + * addressing method 0. + */ +u64 scsilun_to_int(struct scsi_lun *scsilun) +{ + int i; + u64 lun; + + lun = 0; + for (i = 0; i < sizeof(lun); i += 2) + lun = lun | (((u64)scsilun->scsi_lun[i] << ((i + 1) * 8)) | + ((u64)scsilun->scsi_lun[i + 1] << (i * 8))); + return lun; +} +EXPORT_SYMBOL(scsilun_to_int); + +/** + * int_to_scsilun - reverts an int into a scsi_lun + * @lun: integer to be reverted + * @scsilun: struct scsi_lun to be set. + * + * Description: + * Reverts the functionality of the scsilun_to_int, which packed + * an 8-byte lun value into an int. This routine unpacks the int + * back into the lun value. + * + * Notes: + * Given an integer : 0x0b03d204, this function returns a + * struct scsi_lun of: d2 04 0b 03 00 00 00 00 + * + */ +void int_to_scsilun(u64 lun, struct scsi_lun *scsilun) +{ + int i; + + memset(scsilun->scsi_lun, 0, sizeof(scsilun->scsi_lun)); + + for (i = 0; i < sizeof(lun); i += 2) { + scsilun->scsi_lun[i] = (lun >> 8) & 0xFF; + scsilun->scsi_lun[i+1] = lun & 0xFF; + lun = lun >> 16; + } +} +EXPORT_SYMBOL(int_to_scsilun); + +/** + * scsi_normalize_sense - normalize main elements from either fixed or + * descriptor sense data format into a common format. + * + * @sense_buffer: byte array containing sense data returned by device + * @sb_len: number of valid bytes in sense_buffer + * @sshdr: pointer to instance of structure that common + * elements are written to. + * + * Notes: + * The "main elements" from sense data are: response_code, sense_key, + * asc, ascq and additional_length (only for descriptor format). + * + * Typically this function can be called after a device has + * responded to a SCSI command with the CHECK_CONDITION status. + * + * Return value: + * true if valid sense data information found, else false; + */ +bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, + struct scsi_sense_hdr *sshdr) +{ + memset(sshdr, 0, sizeof(struct scsi_sense_hdr)); + + if (!sense_buffer || !sb_len) + return false; + + sshdr->response_code = (sense_buffer[0] & 0x7f); + + if (!scsi_sense_valid(sshdr)) + return false; + + if (sshdr->response_code >= 0x72) { + /* + * descriptor format + */ + if (sb_len > 1) + sshdr->sense_key = (sense_buffer[1] & 0xf); + if (sb_len > 2) + sshdr->asc = sense_buffer[2]; + if (sb_len > 3) + sshdr->ascq = sense_buffer[3]; + if (sb_len > 7) + sshdr->additional_length = sense_buffer[7]; + } else { + /* + * fixed format + */ + if (sb_len > 2) + sshdr->sense_key = (sense_buffer[2] & 0xf); + if (sb_len > 7) { + sb_len = (sb_len < (sense_buffer[7] + 8)) ? + sb_len : (sense_buffer[7] + 8); + if (sb_len > 12) + sshdr->asc = sense_buffer[12]; + if (sb_len > 13) + sshdr->ascq = sense_buffer[13]; + } + } + + return true; +} +EXPORT_SYMBOL(scsi_normalize_sense); + +/** + * scsi_sense_desc_find - search for a given descriptor type in descriptor sense data format. + * @sense_buffer: byte array of descriptor format sense data + * @sb_len: number of valid bytes in sense_buffer + * @desc_type: value of descriptor type to find + * (e.g. 0 -> information) + * + * Notes: + * only valid when sense data is in descriptor format + * + * Return value: + * pointer to start of (first) descriptor if found else NULL + */ +const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, + int desc_type) +{ + int add_sen_len, add_len, desc_len, k; + const u8 * descp; + + if ((sb_len < 8) || (0 == (add_sen_len = sense_buffer[7]))) + return NULL; + if ((sense_buffer[0] < 0x72) || (sense_buffer[0] > 0x73)) + return NULL; + add_sen_len = (add_sen_len < (sb_len - 8)) ? + add_sen_len : (sb_len - 8); + descp = &sense_buffer[8]; + for (desc_len = 0, k = 0; k < add_sen_len; k += desc_len) { + descp += desc_len; + add_len = (k < (add_sen_len - 1)) ? descp[1]: -1; + desc_len = add_len + 2; + if (descp[0] == desc_type) + return descp; + if (add_len < 0) // short descriptor ?? + break; + } + return NULL; +} +EXPORT_SYMBOL(scsi_sense_desc_find); + +/** + * scsi_build_sense_buffer - build sense data in a buffer + * @desc: Sense format (non-zero == descriptor format, + * 0 == fixed format) + * @buf: Where to build sense data + * @key: Sense key + * @asc: Additional sense code + * @ascq: Additional sense code qualifier + * + **/ +void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq) +{ + if (desc) { + buf[0] = 0x72; /* descriptor, current */ + buf[1] = key; + buf[2] = asc; + buf[3] = ascq; + buf[7] = 0; + } else { + buf[0] = 0x70; /* fixed, current */ + buf[2] = key; + buf[7] = 0xa; + buf[12] = asc; + buf[13] = ascq; + } +} +EXPORT_SYMBOL(scsi_build_sense_buffer); + +/** + * scsi_set_sense_information - set the information field in a + * formatted sense data buffer + * @buf: Where to build sense data + * @buf_len: buffer length + * @info: 64-bit information value to be set + * + * Return value: + * 0 on success or -EINVAL for invalid sense buffer length + **/ +int scsi_set_sense_information(u8 *buf, int buf_len, u64 info) +{ + if ((buf[0] & 0x7f) == 0x72) { + u8 *ucp, len; + + len = buf[7]; + ucp = (char *)scsi_sense_desc_find(buf, len + 8, 0); + if (!ucp) { + buf[7] = len + 0xc; + ucp = buf + 8 + len; + } + + if (buf_len < len + 0xc) + /* Not enough room for info */ + return -EINVAL; + + ucp[0] = 0; + ucp[1] = 0xa; + ucp[2] = 0x80; /* Valid bit */ + ucp[3] = 0; + put_unaligned_be64(info, &ucp[4]); + } else if ((buf[0] & 0x7f) == 0x70) { + /* + * Only set the 'VALID' bit if we can represent the value + * correctly; otherwise just fill out the lower bytes and + * clear the 'VALID' flag. + */ + if (info <= 0xffffffffUL) + buf[0] |= 0x80; + else + buf[0] &= 0x7f; + put_unaligned_be32((u32)info, &buf[3]); + } + + return 0; +} +EXPORT_SYMBOL(scsi_set_sense_information); + +/** + * scsi_set_sense_field_pointer - set the field pointer sense key + * specific information in a formatted sense data buffer + * @buf: Where to build sense data + * @buf_len: buffer length + * @fp: field pointer to be set + * @bp: bit pointer to be set + * @cd: command/data bit + * + * Return value: + * 0 on success or -EINVAL for invalid sense buffer length + */ +int scsi_set_sense_field_pointer(u8 *buf, int buf_len, u16 fp, u8 bp, bool cd) +{ + u8 *ucp, len; + + if ((buf[0] & 0x7f) == 0x72) { + len = buf[7]; + ucp = (char *)scsi_sense_desc_find(buf, len + 8, 2); + if (!ucp) { + buf[7] = len + 8; + ucp = buf + 8 + len; + } + + if (buf_len < len + 8) + /* Not enough room for info */ + return -EINVAL; + + ucp[0] = 2; + ucp[1] = 6; + ucp[4] = 0x80; /* Valid bit */ + if (cd) + ucp[4] |= 0x40; + if (bp < 0x8) + ucp[4] |= 0x8 | bp; + put_unaligned_be16(fp, &ucp[5]); + } else if ((buf[0] & 0x7f) == 0x70) { + len = buf[7]; + if (len < 18) + buf[7] = 18; + + buf[15] = 0x80; + if (cd) + buf[15] |= 0x40; + if (bp < 0x8) + buf[15] |= 0x8 | bp; + put_unaligned_be16(fp, &buf[16]); + } + + return 0; +} +EXPORT_SYMBOL(scsi_set_sense_field_pointer); -- cgit v1.2.3