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/orangefs/dir.c | 404 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 404 insertions(+) create mode 100644 fs/orangefs/dir.c (limited to 'fs/orangefs/dir.c') diff --git a/fs/orangefs/dir.c b/fs/orangefs/dir.c new file mode 100644 index 000000000..9cacce5d5 --- /dev/null +++ b/fs/orangefs/dir.c @@ -0,0 +1,404 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2017 Omnibond Systems, L.L.C. + */ + +#include "protocol.h" +#include "orangefs-kernel.h" +#include "orangefs-bufmap.h" + +struct orangefs_dir_part { + struct orangefs_dir_part *next; + size_t len; +}; + +struct orangefs_dir { + __u64 token; + struct orangefs_dir_part *part; + loff_t end; + int error; +}; + +#define PART_SHIFT (24) +#define PART_SIZE (1<<24) +#define PART_MASK (~(PART_SIZE - 1)) + +/* + * There can be up to 512 directory entries. Each entry is encoded as + * follows: + * 4 bytes: string size (n) + * n bytes: string + * 1 byte: trailing zero + * padding to 8 bytes + * 16 bytes: khandle + * padding to 8 bytes + * + * The trailer_buf starts with a struct orangefs_readdir_response_s + * which must be skipped to get to the directory data. + * + * The data which is received from the userspace daemon is termed a + * part and is stored in a linked list in case more than one part is + * needed for a large directory. + * + * The position pointer (ctx->pos) encodes the part and offset on which + * to begin reading at. Bits above PART_SHIFT encode the part and bits + * below PART_SHIFT encode the offset. Parts are stored in a linked + * list which grows as data is received from the server. The overhead + * associated with managing the list is presumed to be small compared to + * the overhead of communicating with the server. + * + * As data is received from the server, it is placed at the end of the + * part list. Data is parsed from the current position as it is needed. + * When data is determined to be corrupt, it is either because the + * userspace component has sent back corrupt data or because the file + * pointer has been moved to an invalid location. Since the two cannot + * be differentiated, return EIO. + * + * Part zero is synthesized to contains `.' and `..'. Part one is the + * first part of the part list. + */ + +static int do_readdir(struct orangefs_inode_s *oi, + struct orangefs_dir *od, struct dentry *dentry, + struct orangefs_kernel_op_s *op) +{ + struct orangefs_readdir_response_s *resp; + int bufi, r; + + /* + * Despite the badly named field, readdir does not use shared + * memory. However, there are a limited number of readdir + * slots, which must be allocated here. This flag simply tells + * the op scheduler to return the op here for retry. + */ + op->uses_shared_memory = 1; + op->upcall.req.readdir.refn = oi->refn; + op->upcall.req.readdir.token = od->token; + op->upcall.req.readdir.max_dirent_count = + ORANGEFS_MAX_DIRENT_COUNT_READDIR; + +again: + bufi = orangefs_readdir_index_get(); + if (bufi < 0) { + od->error = bufi; + return bufi; + } + + op->upcall.req.readdir.buf_index = bufi; + + r = service_operation(op, "orangefs_readdir", + get_interruptible_flag(dentry->d_inode)); + + orangefs_readdir_index_put(bufi); + + if (op_state_purged(op)) { + if (r == -EAGAIN) { + vfree(op->downcall.trailer_buf); + goto again; + } else if (r == -EIO) { + vfree(op->downcall.trailer_buf); + od->error = r; + return r; + } + } + + if (r < 0) { + vfree(op->downcall.trailer_buf); + od->error = r; + return r; + } else if (op->downcall.status) { + vfree(op->downcall.trailer_buf); + od->error = op->downcall.status; + return op->downcall.status; + } + + /* + * The maximum size is size per entry times the 512 entries plus + * the header. This is well under the limit. + */ + if (op->downcall.trailer_size > PART_SIZE) { + vfree(op->downcall.trailer_buf); + od->error = -EIO; + return -EIO; + } + + resp = (struct orangefs_readdir_response_s *) + op->downcall.trailer_buf; + od->token = resp->token; + return 0; +} + +static int parse_readdir(struct orangefs_dir *od, + struct orangefs_kernel_op_s *op) +{ + struct orangefs_dir_part *part, *new; + size_t count; + + count = 1; + part = od->part; + while (part) { + count++; + if (part->next) + part = part->next; + else + break; + } + + new = (void *)op->downcall.trailer_buf; + new->next = NULL; + new->len = op->downcall.trailer_size - + sizeof(struct orangefs_readdir_response_s); + if (!od->part) + od->part = new; + else + part->next = new; + count++; + od->end = count << PART_SHIFT; + + return 0; +} + +static int orangefs_dir_more(struct orangefs_inode_s *oi, + struct orangefs_dir *od, struct dentry *dentry) +{ + struct orangefs_kernel_op_s *op; + int r; + + op = op_alloc(ORANGEFS_VFS_OP_READDIR); + if (!op) { + od->error = -ENOMEM; + return -ENOMEM; + } + r = do_readdir(oi, od, dentry, op); + if (r) { + od->error = r; + goto out; + } + r = parse_readdir(od, op); + if (r) { + od->error = r; + goto out; + } + + od->error = 0; +out: + op_release(op); + return od->error; +} + +static int fill_from_part(struct orangefs_dir_part *part, + struct dir_context *ctx) +{ + const int offset = sizeof(struct orangefs_readdir_response_s); + struct orangefs_khandle *khandle; + __u32 *len, padlen; + loff_t i; + char *s; + i = ctx->pos & ~PART_MASK; + + /* The file offset from userspace is too large. */ + if (i > part->len) + return 1; + + /* + * If the seek pointer is positioned just before an entry it + * should find the next entry. + */ + if (i % 8) + i = i + (8 - i%8)%8; + + while (i < part->len) { + if (part->len < i + sizeof *len) + break; + len = (void *)part + offset + i; + /* + * len is the size of the string itself. padlen is the + * total size of the encoded string. + */ + padlen = (sizeof *len + *len + 1) + + (8 - (sizeof *len + *len + 1)%8)%8; + if (part->len < i + padlen + sizeof *khandle) + goto next; + s = (void *)part + offset + i + sizeof *len; + if (s[*len] != 0) + goto next; + khandle = (void *)part + offset + i + padlen; + if (!dir_emit(ctx, s, *len, + orangefs_khandle_to_ino(khandle), + DT_UNKNOWN)) + return 0; + i += padlen + sizeof *khandle; + i = i + (8 - i%8)%8; + BUG_ON(i > part->len); + ctx->pos = (ctx->pos & PART_MASK) | i; + continue; +next: + i += 8; + } + return 1; +} + +static int orangefs_dir_fill(struct orangefs_inode_s *oi, + struct orangefs_dir *od, struct dentry *dentry, + struct dir_context *ctx) +{ + struct orangefs_dir_part *part; + size_t count; + + count = ((ctx->pos & PART_MASK) >> PART_SHIFT) - 1; + + part = od->part; + while (part->next && count) { + count--; + part = part->next; + } + /* This means the userspace file offset is invalid. */ + if (count) { + od->error = -EIO; + return -EIO; + } + + while (part && part->len) { + int r; + r = fill_from_part(part, ctx); + if (r < 0) { + od->error = r; + return r; + } else if (r == 0) { + /* Userspace buffer is full. */ + break; + } else { + /* + * The part ran out of data. Move to the next + * part. */ + ctx->pos = (ctx->pos & PART_MASK) + + (1 << PART_SHIFT); + part = part->next; + } + } + return 0; +} + +static loff_t orangefs_dir_llseek(struct file *file, loff_t offset, + int whence) +{ + struct orangefs_dir *od = file->private_data; + /* + * Delete the stored data so userspace sees new directory + * entries. + */ + if (!whence && offset < od->end) { + struct orangefs_dir_part *part = od->part; + while (part) { + struct orangefs_dir_part *next = part->next; + vfree(part); + part = next; + } + od->token = ORANGEFS_ITERATE_START; + od->part = NULL; + od->end = 1 << PART_SHIFT; + } + return default_llseek(file, offset, whence); +} + +static int orangefs_dir_iterate(struct file *file, + struct dir_context *ctx) +{ + struct orangefs_inode_s *oi; + struct orangefs_dir *od; + struct dentry *dentry; + int r; + + dentry = file->f_path.dentry; + oi = ORANGEFS_I(dentry->d_inode); + od = file->private_data; + + if (od->error) + return od->error; + + if (ctx->pos == 0) { + if (!dir_emit_dot(file, ctx)) + return 0; + ctx->pos++; + } + if (ctx->pos == 1) { + if (!dir_emit_dotdot(file, ctx)) + return 0; + ctx->pos = 1 << PART_SHIFT; + } + + /* + * The seek position is in the first synthesized part but is not + * valid. + */ + if ((ctx->pos & PART_MASK) == 0) + return -EIO; + + r = 0; + + /* + * Must read more if the user has sought past what has been read + * so far. Stop a user who has sought past the end. + */ + while (od->token != ORANGEFS_ITERATE_END && + ctx->pos > od->end) { + r = orangefs_dir_more(oi, od, dentry); + if (r) + return r; + } + if (od->token == ORANGEFS_ITERATE_END && ctx->pos > od->end) + return -EIO; + + /* Then try to fill if there's any left in the buffer. */ + if (ctx->pos < od->end) { + r = orangefs_dir_fill(oi, od, dentry, ctx); + if (r) + return r; + } + + /* Finally get some more and try to fill. */ + if (od->token != ORANGEFS_ITERATE_END) { + r = orangefs_dir_more(oi, od, dentry); + if (r) + return r; + r = orangefs_dir_fill(oi, od, dentry, ctx); + } + + return r; +} + +static int orangefs_dir_open(struct inode *inode, struct file *file) +{ + struct orangefs_dir *od; + file->private_data = kmalloc(sizeof(struct orangefs_dir), + GFP_KERNEL); + if (!file->private_data) + return -ENOMEM; + od = file->private_data; + od->token = ORANGEFS_ITERATE_START; + od->part = NULL; + od->end = 1 << PART_SHIFT; + od->error = 0; + return 0; +} + +static int orangefs_dir_release(struct inode *inode, struct file *file) +{ + struct orangefs_dir *od = file->private_data; + struct orangefs_dir_part *part = od->part; + while (part) { + struct orangefs_dir_part *next = part->next; + vfree(part); + part = next; + } + kfree(od); + return 0; +} + +const struct file_operations orangefs_dir_operations = { + .llseek = orangefs_dir_llseek, + .read = generic_read_dir, + .iterate_shared = orangefs_dir_iterate, + .open = orangefs_dir_open, + .release = orangefs_dir_release +}; -- cgit v1.2.3