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(). ... --- fs/openpromfs/Makefile | 8 + fs/openpromfs/inode.c | 475 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 483 insertions(+) create mode 100644 fs/openpromfs/Makefile create mode 100644 fs/openpromfs/inode.c (limited to 'fs/openpromfs') diff --git a/fs/openpromfs/Makefile b/fs/openpromfs/Makefile new file mode 100644 index 000000000..843c270cd --- /dev/null +++ b/fs/openpromfs/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the Linux Sun Openprom filesystem routines. +# + +obj-$(CONFIG_SUN_OPENPROMFS) += openpromfs.o + +openpromfs-objs := inode.o diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c new file mode 100644 index 000000000..f0b7f4d51 --- /dev/null +++ b/fs/openpromfs/inode.c @@ -0,0 +1,475 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* inode.c: /proc/openprom handling routines + * + * Copyright (C) 1996-1999 Jakub Jelinek (jakub@redhat.com) + * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +static DEFINE_MUTEX(op_mutex); + +#define OPENPROM_ROOT_INO 0 + +enum op_inode_type { + op_inode_node, + op_inode_prop, +}; + +union op_inode_data { + struct device_node *node; + struct property *prop; +}; + +struct op_inode_info { + struct inode vfs_inode; + enum op_inode_type type; + union op_inode_data u; +}; + +static struct inode *openprom_iget(struct super_block *sb, ino_t ino); + +static inline struct op_inode_info *OP_I(struct inode *inode) +{ + return container_of(inode, struct op_inode_info, vfs_inode); +} + +static int is_string(unsigned char *p, int len) +{ + int i; + + for (i = 0; i < len; i++) { + unsigned char val = p[i]; + + if ((i && !val) || + (val >= ' ' && val <= '~')) + continue; + + return 0; + } + + return 1; +} + +static int property_show(struct seq_file *f, void *v) +{ + struct property *prop = f->private; + void *pval; + int len; + + len = prop->length; + pval = prop->value; + + if (is_string(pval, len)) { + while (len > 0) { + int n = strlen(pval); + + seq_printf(f, "%s", (char *) pval); + + /* Skip over the NULL byte too. */ + pval += n + 1; + len -= n + 1; + + if (len > 0) + seq_printf(f, " + "); + } + } else { + if (len & 3) { + while (len) { + len--; + if (len) + seq_printf(f, "%02x.", + *(unsigned char *) pval); + else + seq_printf(f, "%02x", + *(unsigned char *) pval); + pval++; + } + } else { + while (len >= 4) { + len -= 4; + + if (len) + seq_printf(f, "%08x.", + *(unsigned int *) pval); + else + seq_printf(f, "%08x", + *(unsigned int *) pval); + pval += 4; + } + } + } + seq_printf(f, "\n"); + + return 0; +} + +static void *property_start(struct seq_file *f, loff_t *pos) +{ + if (*pos == 0) + return pos; + return NULL; +} + +static void *property_next(struct seq_file *f, void *v, loff_t *pos) +{ + (*pos)++; + return NULL; +} + +static void property_stop(struct seq_file *f, void *v) +{ + /* Nothing to do */ +} + +static const struct seq_operations property_op = { + .start = property_start, + .next = property_next, + .stop = property_stop, + .show = property_show +}; + +static int property_open(struct inode *inode, struct file *file) +{ + struct op_inode_info *oi = OP_I(inode); + int ret; + + BUG_ON(oi->type != op_inode_prop); + + ret = seq_open(file, &property_op); + if (!ret) { + struct seq_file *m = file->private_data; + m->private = oi->u.prop; + } + return ret; +} + +static const struct file_operations openpromfs_prop_ops = { + .open = property_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static int openpromfs_readdir(struct file *, struct dir_context *); + +static const struct file_operations openprom_operations = { + .read = generic_read_dir, + .iterate_shared = openpromfs_readdir, + .llseek = generic_file_llseek, +}; + +static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, unsigned int); + +static const struct inode_operations openprom_inode_operations = { + .lookup = openpromfs_lookup, +}; + +static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) +{ + struct op_inode_info *ent_oi, *oi = OP_I(dir); + struct device_node *dp, *child; + struct property *prop; + enum op_inode_type ent_type; + union op_inode_data ent_data; + const char *name; + struct inode *inode; + unsigned int ino; + int len; + + BUG_ON(oi->type != op_inode_node); + + dp = oi->u.node; + + name = dentry->d_name.name; + len = dentry->d_name.len; + + mutex_lock(&op_mutex); + + child = dp->child; + while (child) { + const char *node_name = kbasename(child->full_name); + int n = strlen(node_name); + + if (len == n && + !strncmp(node_name, name, len)) { + ent_type = op_inode_node; + ent_data.node = child; + ino = child->unique_id; + goto found; + } + child = child->sibling; + } + + prop = dp->properties; + while (prop) { + int n = strlen(prop->name); + + if (len == n && !strncmp(prop->name, name, len)) { + ent_type = op_inode_prop; + ent_data.prop = prop; + ino = prop->unique_id; + goto found; + } + + prop = prop->next; + } + + mutex_unlock(&op_mutex); + return ERR_PTR(-ENOENT); + +found: + inode = openprom_iget(dir->i_sb, ino); + mutex_unlock(&op_mutex); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (inode->i_state & I_NEW) { + inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); + ent_oi = OP_I(inode); + ent_oi->type = ent_type; + ent_oi->u = ent_data; + + switch (ent_type) { + case op_inode_node: + inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; + inode->i_op = &openprom_inode_operations; + inode->i_fop = &openprom_operations; + set_nlink(inode, 2); + break; + case op_inode_prop: + if (of_node_name_eq(dp, "options") && (len == 17) && + !strncmp (name, "security-password", 17)) + inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR; + else + inode->i_mode = S_IFREG | S_IRUGO; + inode->i_fop = &openpromfs_prop_ops; + set_nlink(inode, 1); + inode->i_size = ent_oi->u.prop->length; + break; + } + unlock_new_inode(inode); + } + + return d_splice_alias(inode, dentry); +} + +static int openpromfs_readdir(struct file *file, struct dir_context *ctx) +{ + struct inode *inode = file_inode(file); + struct op_inode_info *oi = OP_I(inode); + struct device_node *dp = oi->u.node; + struct device_node *child; + struct property *prop; + int i; + + mutex_lock(&op_mutex); + + if (ctx->pos == 0) { + if (!dir_emit(ctx, ".", 1, inode->i_ino, DT_DIR)) + goto out; + ctx->pos = 1; + } + if (ctx->pos == 1) { + if (!dir_emit(ctx, "..", 2, + (dp->parent == NULL ? + OPENPROM_ROOT_INO : + dp->parent->unique_id), DT_DIR)) + goto out; + ctx->pos = 2; + } + i = ctx->pos - 2; + + /* First, the children nodes as directories. */ + child = dp->child; + while (i && child) { + child = child->sibling; + i--; + } + while (child) { + if (!dir_emit(ctx, + kbasename(child->full_name), + strlen(kbasename(child->full_name)), + child->unique_id, DT_DIR)) + goto out; + + ctx->pos++; + child = child->sibling; + } + + /* Next, the properties as files. */ + prop = dp->properties; + while (i && prop) { + prop = prop->next; + i--; + } + while (prop) { + if (!dir_emit(ctx, prop->name, strlen(prop->name), + prop->unique_id, DT_REG)) + goto out; + + ctx->pos++; + prop = prop->next; + } + +out: + mutex_unlock(&op_mutex); + return 0; +} + +static struct kmem_cache *op_inode_cachep; + +static struct inode *openprom_alloc_inode(struct super_block *sb) +{ + struct op_inode_info *oi; + + oi = alloc_inode_sb(sb, op_inode_cachep, GFP_KERNEL); + if (!oi) + return NULL; + + return &oi->vfs_inode; +} + +static void openprom_free_inode(struct inode *inode) +{ + kmem_cache_free(op_inode_cachep, OP_I(inode)); +} + +static struct inode *openprom_iget(struct super_block *sb, ino_t ino) +{ + struct inode *inode = iget_locked(sb, ino); + if (!inode) + inode = ERR_PTR(-ENOMEM); + return inode; +} + +static int openprom_remount(struct super_block *sb, int *flags, char *data) +{ + sync_filesystem(sb); + *flags |= SB_NOATIME; + return 0; +} + +static const struct super_operations openprom_sops = { + .alloc_inode = openprom_alloc_inode, + .free_inode = openprom_free_inode, + .statfs = simple_statfs, + .remount_fs = openprom_remount, +}; + +static int openprom_fill_super(struct super_block *s, struct fs_context *fc) +{ + struct inode *root_inode; + struct op_inode_info *oi; + int ret; + + s->s_flags |= SB_NOATIME; + s->s_blocksize = 1024; + s->s_blocksize_bits = 10; + s->s_magic = OPENPROM_SUPER_MAGIC; + s->s_op = &openprom_sops; + s->s_time_gran = 1; + root_inode = openprom_iget(s, OPENPROM_ROOT_INO); + if (IS_ERR(root_inode)) { + ret = PTR_ERR(root_inode); + goto out_no_root; + } + + root_inode->i_mtime = root_inode->i_atime = + root_inode->i_ctime = current_time(root_inode); + root_inode->i_op = &openprom_inode_operations; + root_inode->i_fop = &openprom_operations; + root_inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; + oi = OP_I(root_inode); + oi->type = op_inode_node; + oi->u.node = of_find_node_by_path("/"); + unlock_new_inode(root_inode); + + s->s_root = d_make_root(root_inode); + if (!s->s_root) + goto out_no_root_dentry; + return 0; + +out_no_root_dentry: + ret = -ENOMEM; +out_no_root: + printk("openprom_fill_super: get root inode failed\n"); + return ret; +} + +static int openpromfs_get_tree(struct fs_context *fc) +{ + return get_tree_single(fc, openprom_fill_super); +} + +static const struct fs_context_operations openpromfs_context_ops = { + .get_tree = openpromfs_get_tree, +}; + +static int openpromfs_init_fs_context(struct fs_context *fc) +{ + fc->ops = &openpromfs_context_ops; + return 0; +} + +static struct file_system_type openprom_fs_type = { + .owner = THIS_MODULE, + .name = "openpromfs", + .init_fs_context = openpromfs_init_fs_context, + .kill_sb = kill_anon_super, +}; +MODULE_ALIAS_FS("openpromfs"); + +static void op_inode_init_once(void *data) +{ + struct op_inode_info *oi = (struct op_inode_info *) data; + + inode_init_once(&oi->vfs_inode); +} + +static int __init init_openprom_fs(void) +{ + int err; + + op_inode_cachep = kmem_cache_create("op_inode_cache", + sizeof(struct op_inode_info), + 0, + (SLAB_RECLAIM_ACCOUNT | + SLAB_MEM_SPREAD | SLAB_ACCOUNT), + op_inode_init_once); + if (!op_inode_cachep) + return -ENOMEM; + + err = register_filesystem(&openprom_fs_type); + if (err) + kmem_cache_destroy(op_inode_cachep); + + return err; +} + +static void __exit exit_openprom_fs(void) +{ + unregister_filesystem(&openprom_fs_type); + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); + kmem_cache_destroy(op_inode_cachep); +} + +module_init(init_openprom_fs) +module_exit(exit_openprom_fs) +MODULE_LICENSE("GPL"); -- cgit v1.2.3