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(). ... --- net/netlabel/netlabel_cipso_v4.c | 788 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 788 insertions(+) create mode 100644 net/netlabel/netlabel_cipso_v4.c (limited to 'net/netlabel/netlabel_cipso_v4.c') diff --git a/net/netlabel/netlabel_cipso_v4.c b/net/netlabel/netlabel_cipso_v4.c new file mode 100644 index 000000000..fa08ee75a --- /dev/null +++ b/net/netlabel/netlabel_cipso_v4.c @@ -0,0 +1,788 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * NetLabel CIPSO/IPv4 Support + * + * This file defines the CIPSO/IPv4 functions for the NetLabel system. The + * NetLabel system manages static and dynamic label mappings for network + * protocols such as CIPSO and RIPSO. + * + * Author: Paul Moore + */ + +/* + * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "netlabel_user.h" +#include "netlabel_cipso_v4.h" +#include "netlabel_mgmt.h" +#include "netlabel_domainhash.h" + +/* Argument struct for cipso_v4_doi_walk() */ +struct netlbl_cipsov4_doiwalk_arg { + struct netlink_callback *nl_cb; + struct sk_buff *skb; + u32 seq; +}; + +/* Argument struct for netlbl_domhsh_walk() */ +struct netlbl_domhsh_walk_arg { + struct netlbl_audit *audit_info; + u32 doi; +}; + +/* NetLabel Generic NETLINK CIPSOv4 family */ +static struct genl_family netlbl_cipsov4_gnl_family; +/* NetLabel Netlink attribute policy */ +static const struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1] = { + [NLBL_CIPSOV4_A_DOI] = { .type = NLA_U32 }, + [NLBL_CIPSOV4_A_MTYPE] = { .type = NLA_U32 }, + [NLBL_CIPSOV4_A_TAG] = { .type = NLA_U8 }, + [NLBL_CIPSOV4_A_TAGLST] = { .type = NLA_NESTED }, + [NLBL_CIPSOV4_A_MLSLVLLOC] = { .type = NLA_U32 }, + [NLBL_CIPSOV4_A_MLSLVLREM] = { .type = NLA_U32 }, + [NLBL_CIPSOV4_A_MLSLVL] = { .type = NLA_NESTED }, + [NLBL_CIPSOV4_A_MLSLVLLST] = { .type = NLA_NESTED }, + [NLBL_CIPSOV4_A_MLSCATLOC] = { .type = NLA_U32 }, + [NLBL_CIPSOV4_A_MLSCATREM] = { .type = NLA_U32 }, + [NLBL_CIPSOV4_A_MLSCAT] = { .type = NLA_NESTED }, + [NLBL_CIPSOV4_A_MLSCATLST] = { .type = NLA_NESTED }, +}; + +/* + * Helper Functions + */ + +/** + * netlbl_cipsov4_add_common - Parse the common sections of a ADD message + * @info: the Generic NETLINK info block + * @doi_def: the CIPSO V4 DOI definition + * + * Description: + * Parse the common sections of a ADD message and fill in the related values + * in @doi_def. Returns zero on success, negative values on failure. + * + */ +static int netlbl_cipsov4_add_common(struct genl_info *info, + struct cipso_v4_doi *doi_def) +{ + struct nlattr *nla; + int nla_rem; + u32 iter = 0; + + doi_def->doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]); + + if (nla_validate_nested_deprecated(info->attrs[NLBL_CIPSOV4_A_TAGLST], + NLBL_CIPSOV4_A_MAX, + netlbl_cipsov4_genl_policy, + NULL) != 0) + return -EINVAL; + + nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem) + if (nla_type(nla) == NLBL_CIPSOV4_A_TAG) { + if (iter >= CIPSO_V4_TAG_MAXCNT) + return -EINVAL; + doi_def->tags[iter++] = nla_get_u8(nla); + } + while (iter < CIPSO_V4_TAG_MAXCNT) + doi_def->tags[iter++] = CIPSO_V4_TAG_INVALID; + + return 0; +} + +/* + * NetLabel Command Handlers + */ + +/** + * netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition + * @info: the Generic NETLINK info block + * @audit_info: NetLabel audit information + * + * Description: + * Create a new CIPSO_V4_MAP_TRANS DOI definition based on the given ADD + * message and add it to the CIPSO V4 engine. Return zero on success and + * non-zero on error. + * + */ +static int netlbl_cipsov4_add_std(struct genl_info *info, + struct netlbl_audit *audit_info) +{ + int ret_val = -EINVAL; + struct cipso_v4_doi *doi_def = NULL; + struct nlattr *nla_a; + struct nlattr *nla_b; + int nla_a_rem; + int nla_b_rem; + u32 iter; + + if (!info->attrs[NLBL_CIPSOV4_A_TAGLST] || + !info->attrs[NLBL_CIPSOV4_A_MLSLVLLST]) + return -EINVAL; + + if (nla_validate_nested_deprecated(info->attrs[NLBL_CIPSOV4_A_MLSLVLLST], + NLBL_CIPSOV4_A_MAX, + netlbl_cipsov4_genl_policy, + NULL) != 0) + return -EINVAL; + + doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); + if (doi_def == NULL) + return -ENOMEM; + doi_def->map.std = kzalloc(sizeof(*doi_def->map.std), GFP_KERNEL); + if (doi_def->map.std == NULL) { + kfree(doi_def); + return -ENOMEM; + } + doi_def->type = CIPSO_V4_MAP_TRANS; + + ret_val = netlbl_cipsov4_add_common(info, doi_def); + if (ret_val != 0) + goto add_std_failure; + ret_val = -EINVAL; + + nla_for_each_nested(nla_a, + info->attrs[NLBL_CIPSOV4_A_MLSLVLLST], + nla_a_rem) + if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSLVL) { + if (nla_validate_nested_deprecated(nla_a, + NLBL_CIPSOV4_A_MAX, + netlbl_cipsov4_genl_policy, + NULL) != 0) + goto add_std_failure; + nla_for_each_nested(nla_b, nla_a, nla_b_rem) + switch (nla_type(nla_b)) { + case NLBL_CIPSOV4_A_MLSLVLLOC: + if (nla_get_u32(nla_b) > + CIPSO_V4_MAX_LOC_LVLS) + goto add_std_failure; + if (nla_get_u32(nla_b) >= + doi_def->map.std->lvl.local_size) + doi_def->map.std->lvl.local_size = + nla_get_u32(nla_b) + 1; + break; + case NLBL_CIPSOV4_A_MLSLVLREM: + if (nla_get_u32(nla_b) > + CIPSO_V4_MAX_REM_LVLS) + goto add_std_failure; + if (nla_get_u32(nla_b) >= + doi_def->map.std->lvl.cipso_size) + doi_def->map.std->lvl.cipso_size = + nla_get_u32(nla_b) + 1; + break; + } + } + doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size, + sizeof(u32), + GFP_KERNEL | __GFP_NOWARN); + if (doi_def->map.std->lvl.local == NULL) { + ret_val = -ENOMEM; + goto add_std_failure; + } + doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size, + sizeof(u32), + GFP_KERNEL | __GFP_NOWARN); + if (doi_def->map.std->lvl.cipso == NULL) { + ret_val = -ENOMEM; + goto add_std_failure; + } + for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++) + doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL; + for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++) + doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL; + nla_for_each_nested(nla_a, + info->attrs[NLBL_CIPSOV4_A_MLSLVLLST], + nla_a_rem) + if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSLVL) { + struct nlattr *lvl_loc; + struct nlattr *lvl_rem; + + lvl_loc = nla_find_nested(nla_a, + NLBL_CIPSOV4_A_MLSLVLLOC); + lvl_rem = nla_find_nested(nla_a, + NLBL_CIPSOV4_A_MLSLVLREM); + if (lvl_loc == NULL || lvl_rem == NULL) + goto add_std_failure; + doi_def->map.std->lvl.local[nla_get_u32(lvl_loc)] = + nla_get_u32(lvl_rem); + doi_def->map.std->lvl.cipso[nla_get_u32(lvl_rem)] = + nla_get_u32(lvl_loc); + } + + if (info->attrs[NLBL_CIPSOV4_A_MLSCATLST]) { + if (nla_validate_nested_deprecated(info->attrs[NLBL_CIPSOV4_A_MLSCATLST], + NLBL_CIPSOV4_A_MAX, + netlbl_cipsov4_genl_policy, + NULL) != 0) + goto add_std_failure; + + nla_for_each_nested(nla_a, + info->attrs[NLBL_CIPSOV4_A_MLSCATLST], + nla_a_rem) + if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSCAT) { + if (nla_validate_nested_deprecated(nla_a, + NLBL_CIPSOV4_A_MAX, + netlbl_cipsov4_genl_policy, + NULL) != 0) + goto add_std_failure; + nla_for_each_nested(nla_b, nla_a, nla_b_rem) + switch (nla_type(nla_b)) { + case NLBL_CIPSOV4_A_MLSCATLOC: + if (nla_get_u32(nla_b) > + CIPSO_V4_MAX_LOC_CATS) + goto add_std_failure; + if (nla_get_u32(nla_b) >= + doi_def->map.std->cat.local_size) + doi_def->map.std->cat.local_size = + nla_get_u32(nla_b) + 1; + break; + case NLBL_CIPSOV4_A_MLSCATREM: + if (nla_get_u32(nla_b) > + CIPSO_V4_MAX_REM_CATS) + goto add_std_failure; + if (nla_get_u32(nla_b) >= + doi_def->map.std->cat.cipso_size) + doi_def->map.std->cat.cipso_size = + nla_get_u32(nla_b) + 1; + break; + } + } + doi_def->map.std->cat.local = kcalloc( + doi_def->map.std->cat.local_size, + sizeof(u32), + GFP_KERNEL | __GFP_NOWARN); + if (doi_def->map.std->cat.local == NULL) { + ret_val = -ENOMEM; + goto add_std_failure; + } + doi_def->map.std->cat.cipso = kcalloc( + doi_def->map.std->cat.cipso_size, + sizeof(u32), + GFP_KERNEL | __GFP_NOWARN); + if (doi_def->map.std->cat.cipso == NULL) { + ret_val = -ENOMEM; + goto add_std_failure; + } + for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++) + doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT; + for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++) + doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT; + nla_for_each_nested(nla_a, + info->attrs[NLBL_CIPSOV4_A_MLSCATLST], + nla_a_rem) + if (nla_type(nla_a) == NLBL_CIPSOV4_A_MLSCAT) { + struct nlattr *cat_loc; + struct nlattr *cat_rem; + + cat_loc = nla_find_nested(nla_a, + NLBL_CIPSOV4_A_MLSCATLOC); + cat_rem = nla_find_nested(nla_a, + NLBL_CIPSOV4_A_MLSCATREM); + if (cat_loc == NULL || cat_rem == NULL) + goto add_std_failure; + doi_def->map.std->cat.local[ + nla_get_u32(cat_loc)] = + nla_get_u32(cat_rem); + doi_def->map.std->cat.cipso[ + nla_get_u32(cat_rem)] = + nla_get_u32(cat_loc); + } + } + + ret_val = cipso_v4_doi_add(doi_def, audit_info); + if (ret_val != 0) + goto add_std_failure; + return 0; + +add_std_failure: + cipso_v4_doi_free(doi_def); + return ret_val; +} + +/** + * netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition + * @info: the Generic NETLINK info block + * @audit_info: NetLabel audit information + * + * Description: + * Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message + * and add it to the CIPSO V4 engine. Return zero on success and non-zero on + * error. + * + */ +static int netlbl_cipsov4_add_pass(struct genl_info *info, + struct netlbl_audit *audit_info) +{ + int ret_val; + struct cipso_v4_doi *doi_def = NULL; + + if (!info->attrs[NLBL_CIPSOV4_A_TAGLST]) + return -EINVAL; + + doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); + if (doi_def == NULL) + return -ENOMEM; + doi_def->type = CIPSO_V4_MAP_PASS; + + ret_val = netlbl_cipsov4_add_common(info, doi_def); + if (ret_val != 0) + goto add_pass_failure; + + ret_val = cipso_v4_doi_add(doi_def, audit_info); + if (ret_val != 0) + goto add_pass_failure; + return 0; + +add_pass_failure: + cipso_v4_doi_free(doi_def); + return ret_val; +} + +/** + * netlbl_cipsov4_add_local - Adds a CIPSO V4 DOI definition + * @info: the Generic NETLINK info block + * @audit_info: NetLabel audit information + * + * Description: + * Create a new CIPSO_V4_MAP_LOCAL DOI definition based on the given ADD + * message and add it to the CIPSO V4 engine. Return zero on success and + * non-zero on error. + * + */ +static int netlbl_cipsov4_add_local(struct genl_info *info, + struct netlbl_audit *audit_info) +{ + int ret_val; + struct cipso_v4_doi *doi_def = NULL; + + if (!info->attrs[NLBL_CIPSOV4_A_TAGLST]) + return -EINVAL; + + doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); + if (doi_def == NULL) + return -ENOMEM; + doi_def->type = CIPSO_V4_MAP_LOCAL; + + ret_val = netlbl_cipsov4_add_common(info, doi_def); + if (ret_val != 0) + goto add_local_failure; + + ret_val = cipso_v4_doi_add(doi_def, audit_info); + if (ret_val != 0) + goto add_local_failure; + return 0; + +add_local_failure: + cipso_v4_doi_free(doi_def); + return ret_val; +} + +/** + * netlbl_cipsov4_add - Handle an ADD message + * @skb: the NETLINK buffer + * @info: the Generic NETLINK info block + * + * Description: + * Create a new DOI definition based on the given ADD message and add it to the + * CIPSO V4 engine. Returns zero on success, negative values on failure. + * + */ +static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info) + +{ + int ret_val = -EINVAL; + struct netlbl_audit audit_info; + + if (!info->attrs[NLBL_CIPSOV4_A_DOI] || + !info->attrs[NLBL_CIPSOV4_A_MTYPE]) + return -EINVAL; + + netlbl_netlink_auditinfo(&audit_info); + switch (nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE])) { + case CIPSO_V4_MAP_TRANS: + ret_val = netlbl_cipsov4_add_std(info, &audit_info); + break; + case CIPSO_V4_MAP_PASS: + ret_val = netlbl_cipsov4_add_pass(info, &audit_info); + break; + case CIPSO_V4_MAP_LOCAL: + ret_val = netlbl_cipsov4_add_local(info, &audit_info); + break; + } + if (ret_val == 0) + atomic_inc(&netlabel_mgmt_protocount); + + return ret_val; +} + +/** + * netlbl_cipsov4_list - Handle a LIST message + * @skb: the NETLINK buffer + * @info: the Generic NETLINK info block + * + * Description: + * Process a user generated LIST message and respond accordingly. While the + * response message generated by the kernel is straightforward, determining + * before hand the size of the buffer to allocate is not (we have to generate + * the message to know the size). In order to keep this function sane what we + * do is allocate a buffer of NLMSG_GOODSIZE and try to fit the response in + * that size, if we fail then we restart with a larger buffer and try again. + * We continue in this manner until we hit a limit of failed attempts then we + * give up and just send an error message. Returns zero on success and + * negative values on error. + * + */ +static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info) +{ + int ret_val; + struct sk_buff *ans_skb = NULL; + u32 nlsze_mult = 1; + void *data; + u32 doi; + struct nlattr *nla_a; + struct nlattr *nla_b; + struct cipso_v4_doi *doi_def; + u32 iter; + + if (!info->attrs[NLBL_CIPSOV4_A_DOI]) { + ret_val = -EINVAL; + goto list_failure; + } + +list_start: + ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE * nlsze_mult, GFP_KERNEL); + if (ans_skb == NULL) { + ret_val = -ENOMEM; + goto list_failure; + } + data = genlmsg_put_reply(ans_skb, info, &netlbl_cipsov4_gnl_family, + 0, NLBL_CIPSOV4_C_LIST); + if (data == NULL) { + ret_val = -ENOMEM; + goto list_failure; + } + + doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]); + + rcu_read_lock(); + doi_def = cipso_v4_doi_getdef(doi); + if (doi_def == NULL) { + ret_val = -EINVAL; + goto list_failure_lock; + } + + ret_val = nla_put_u32(ans_skb, NLBL_CIPSOV4_A_MTYPE, doi_def->type); + if (ret_val != 0) + goto list_failure_lock; + + nla_a = nla_nest_start_noflag(ans_skb, NLBL_CIPSOV4_A_TAGLST); + if (nla_a == NULL) { + ret_val = -ENOMEM; + goto list_failure_lock; + } + for (iter = 0; + iter < CIPSO_V4_TAG_MAXCNT && + doi_def->tags[iter] != CIPSO_V4_TAG_INVALID; + iter++) { + ret_val = nla_put_u8(ans_skb, + NLBL_CIPSOV4_A_TAG, + doi_def->tags[iter]); + if (ret_val != 0) + goto list_failure_lock; + } + nla_nest_end(ans_skb, nla_a); + + switch (doi_def->type) { + case CIPSO_V4_MAP_TRANS: + nla_a = nla_nest_start_noflag(ans_skb, + NLBL_CIPSOV4_A_MLSLVLLST); + if (nla_a == NULL) { + ret_val = -ENOMEM; + goto list_failure_lock; + } + for (iter = 0; + iter < doi_def->map.std->lvl.local_size; + iter++) { + if (doi_def->map.std->lvl.local[iter] == + CIPSO_V4_INV_LVL) + continue; + + nla_b = nla_nest_start_noflag(ans_skb, + NLBL_CIPSOV4_A_MLSLVL); + if (nla_b == NULL) { + ret_val = -ENOMEM; + goto list_retry; + } + ret_val = nla_put_u32(ans_skb, + NLBL_CIPSOV4_A_MLSLVLLOC, + iter); + if (ret_val != 0) + goto list_retry; + ret_val = nla_put_u32(ans_skb, + NLBL_CIPSOV4_A_MLSLVLREM, + doi_def->map.std->lvl.local[iter]); + if (ret_val != 0) + goto list_retry; + nla_nest_end(ans_skb, nla_b); + } + nla_nest_end(ans_skb, nla_a); + + nla_a = nla_nest_start_noflag(ans_skb, + NLBL_CIPSOV4_A_MLSCATLST); + if (nla_a == NULL) { + ret_val = -ENOMEM; + goto list_retry; + } + for (iter = 0; + iter < doi_def->map.std->cat.local_size; + iter++) { + if (doi_def->map.std->cat.local[iter] == + CIPSO_V4_INV_CAT) + continue; + + nla_b = nla_nest_start_noflag(ans_skb, + NLBL_CIPSOV4_A_MLSCAT); + if (nla_b == NULL) { + ret_val = -ENOMEM; + goto list_retry; + } + ret_val = nla_put_u32(ans_skb, + NLBL_CIPSOV4_A_MLSCATLOC, + iter); + if (ret_val != 0) + goto list_retry; + ret_val = nla_put_u32(ans_skb, + NLBL_CIPSOV4_A_MLSCATREM, + doi_def->map.std->cat.local[iter]); + if (ret_val != 0) + goto list_retry; + nla_nest_end(ans_skb, nla_b); + } + nla_nest_end(ans_skb, nla_a); + + break; + } + cipso_v4_doi_putdef(doi_def); + rcu_read_unlock(); + + genlmsg_end(ans_skb, data); + return genlmsg_reply(ans_skb, info); + +list_retry: + /* XXX - this limit is a guesstimate */ + if (nlsze_mult < 4) { + cipso_v4_doi_putdef(doi_def); + rcu_read_unlock(); + kfree_skb(ans_skb); + nlsze_mult *= 2; + goto list_start; + } +list_failure_lock: + cipso_v4_doi_putdef(doi_def); + rcu_read_unlock(); +list_failure: + kfree_skb(ans_skb); + return ret_val; +} + +/** + * netlbl_cipsov4_listall_cb - cipso_v4_doi_walk() callback for LISTALL + * @doi_def: the CIPSOv4 DOI definition + * @arg: the netlbl_cipsov4_doiwalk_arg structure + * + * Description: + * This function is designed to be used as a callback to the + * cipso_v4_doi_walk() function for use in generating a response for a LISTALL + * message. Returns the size of the message on success, negative values on + * failure. + * + */ +static int netlbl_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg) +{ + int ret_val = -ENOMEM; + struct netlbl_cipsov4_doiwalk_arg *cb_arg = arg; + void *data; + + data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, + cb_arg->seq, &netlbl_cipsov4_gnl_family, + NLM_F_MULTI, NLBL_CIPSOV4_C_LISTALL); + if (data == NULL) + goto listall_cb_failure; + + ret_val = nla_put_u32(cb_arg->skb, NLBL_CIPSOV4_A_DOI, doi_def->doi); + if (ret_val != 0) + goto listall_cb_failure; + ret_val = nla_put_u32(cb_arg->skb, + NLBL_CIPSOV4_A_MTYPE, + doi_def->type); + if (ret_val != 0) + goto listall_cb_failure; + + genlmsg_end(cb_arg->skb, data); + return 0; + +listall_cb_failure: + genlmsg_cancel(cb_arg->skb, data); + return ret_val; +} + +/** + * netlbl_cipsov4_listall - Handle a LISTALL message + * @skb: the NETLINK buffer + * @cb: the NETLINK callback + * + * Description: + * Process a user generated LISTALL message and respond accordingly. Returns + * zero on success and negative values on error. + * + */ +static int netlbl_cipsov4_listall(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct netlbl_cipsov4_doiwalk_arg cb_arg; + u32 doi_skip = cb->args[0]; + + cb_arg.nl_cb = cb; + cb_arg.skb = skb; + cb_arg.seq = cb->nlh->nlmsg_seq; + + cipso_v4_doi_walk(&doi_skip, netlbl_cipsov4_listall_cb, &cb_arg); + + cb->args[0] = doi_skip; + return skb->len; +} + +/** + * netlbl_cipsov4_remove_cb - netlbl_cipsov4_remove() callback for REMOVE + * @entry: LSM domain mapping entry + * @arg: the netlbl_domhsh_walk_arg structure + * + * Description: + * This function is intended for use by netlbl_cipsov4_remove() as the callback + * for the netlbl_domhsh_walk() function; it removes LSM domain map entries + * which are associated with the CIPSO DOI specified in @arg. Returns zero on + * success, negative values on failure. + * + */ +static int netlbl_cipsov4_remove_cb(struct netlbl_dom_map *entry, void *arg) +{ + struct netlbl_domhsh_walk_arg *cb_arg = arg; + + if (entry->def.type == NETLBL_NLTYPE_CIPSOV4 && + entry->def.cipso->doi == cb_arg->doi) + return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info); + + return 0; +} + +/** + * netlbl_cipsov4_remove - Handle a REMOVE message + * @skb: the NETLINK buffer + * @info: the Generic NETLINK info block + * + * Description: + * Process a user generated REMOVE message and respond accordingly. Returns + * zero on success, negative values on failure. + * + */ +static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info) +{ + int ret_val = -EINVAL; + struct netlbl_domhsh_walk_arg cb_arg; + struct netlbl_audit audit_info; + u32 skip_bkt = 0; + u32 skip_chain = 0; + + if (!info->attrs[NLBL_CIPSOV4_A_DOI]) + return -EINVAL; + + netlbl_netlink_auditinfo(&audit_info); + cb_arg.doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]); + cb_arg.audit_info = &audit_info; + ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain, + netlbl_cipsov4_remove_cb, &cb_arg); + if (ret_val == 0 || ret_val == -ENOENT) { + ret_val = cipso_v4_doi_remove(cb_arg.doi, &audit_info); + if (ret_val == 0) + atomic_dec(&netlabel_mgmt_protocount); + } + + return ret_val; +} + +/* + * NetLabel Generic NETLINK Command Definitions + */ + +static const struct genl_small_ops netlbl_cipsov4_ops[] = { + { + .cmd = NLBL_CIPSOV4_C_ADD, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .flags = GENL_ADMIN_PERM, + .doit = netlbl_cipsov4_add, + .dumpit = NULL, + }, + { + .cmd = NLBL_CIPSOV4_C_REMOVE, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .flags = GENL_ADMIN_PERM, + .doit = netlbl_cipsov4_remove, + .dumpit = NULL, + }, + { + .cmd = NLBL_CIPSOV4_C_LIST, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .flags = 0, + .doit = netlbl_cipsov4_list, + .dumpit = NULL, + }, + { + .cmd = NLBL_CIPSOV4_C_LISTALL, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .flags = 0, + .doit = NULL, + .dumpit = netlbl_cipsov4_listall, + }, +}; + +static struct genl_family netlbl_cipsov4_gnl_family __ro_after_init = { + .hdrsize = 0, + .name = NETLBL_NLTYPE_CIPSOV4_NAME, + .version = NETLBL_PROTO_VERSION, + .maxattr = NLBL_CIPSOV4_A_MAX, + .policy = netlbl_cipsov4_genl_policy, + .module = THIS_MODULE, + .small_ops = netlbl_cipsov4_ops, + .n_small_ops = ARRAY_SIZE(netlbl_cipsov4_ops), + .resv_start_op = NLBL_CIPSOV4_C_LISTALL + 1, +}; + +/* + * NetLabel Generic NETLINK Protocol Functions + */ + +/** + * netlbl_cipsov4_genl_init - Register the CIPSOv4 NetLabel component + * + * Description: + * Register the CIPSOv4 packet NetLabel component with the Generic NETLINK + * mechanism. Returns zero on success, negative values on failure. + * + */ +int __init netlbl_cipsov4_genl_init(void) +{ + return genl_register_family(&netlbl_cipsov4_gnl_family); +} -- cgit v1.2.3