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/adfs/inode.c | 369 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 369 insertions(+) create mode 100644 fs/adfs/inode.c (limited to 'fs/adfs/inode.c') diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c new file mode 100644 index 000000000..c3ac613d0 --- /dev/null +++ b/fs/adfs/inode.c @@ -0,0 +1,369 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/fs/adfs/inode.c + * + * Copyright (C) 1997-1999 Russell King + */ +#include +#include +#include "adfs.h" + +/* + * Lookup/Create a block at offset 'block' into 'inode'. We currently do + * not support creation of new blocks, so we return -EIO for this case. + */ +static int +adfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh, + int create) +{ + if (!create) { + if (block >= inode->i_blocks) + goto abort_toobig; + + block = __adfs_block_map(inode->i_sb, ADFS_I(inode)->indaddr, + block); + if (block) + map_bh(bh, inode->i_sb, block); + return 0; + } + /* don't support allocation of blocks yet */ + return -EIO; + +abort_toobig: + return 0; +} + +static int adfs_writepage(struct page *page, struct writeback_control *wbc) +{ + return block_write_full_page(page, adfs_get_block, wbc); +} + +static int adfs_read_folio(struct file *file, struct folio *folio) +{ + return block_read_full_folio(folio, adfs_get_block); +} + +static void adfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) + truncate_pagecache(inode, inode->i_size); +} + +static int adfs_write_begin(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, + struct page **pagep, void **fsdata) +{ + int ret; + + *pagep = NULL; + ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata, + adfs_get_block, + &ADFS_I(mapping->host)->mmu_private); + if (unlikely(ret)) + adfs_write_failed(mapping, pos + len); + + return ret; +} + +static sector_t _adfs_bmap(struct address_space *mapping, sector_t block) +{ + return generic_block_bmap(mapping, block, adfs_get_block); +} + +static const struct address_space_operations adfs_aops = { + .dirty_folio = block_dirty_folio, + .invalidate_folio = block_invalidate_folio, + .read_folio = adfs_read_folio, + .writepage = adfs_writepage, + .write_begin = adfs_write_begin, + .write_end = generic_write_end, + .bmap = _adfs_bmap +}; + +/* + * Convert ADFS attributes and filetype to Linux permission. + */ +static umode_t +adfs_atts2mode(struct super_block *sb, struct inode *inode) +{ + unsigned int attr = ADFS_I(inode)->attr; + umode_t mode, rmask; + struct adfs_sb_info *asb = ADFS_SB(sb); + + if (attr & ADFS_NDA_DIRECTORY) { + mode = S_IRUGO & asb->s_owner_mask; + return S_IFDIR | S_IXUGO | mode; + } + + switch (adfs_filetype(ADFS_I(inode)->loadaddr)) { + case 0xfc0: /* LinkFS */ + return S_IFLNK|S_IRWXUGO; + + case 0xfe6: /* UnixExec */ + rmask = S_IRUGO | S_IXUGO; + break; + + default: + rmask = S_IRUGO; + } + + mode = S_IFREG; + + if (attr & ADFS_NDA_OWNER_READ) + mode |= rmask & asb->s_owner_mask; + + if (attr & ADFS_NDA_OWNER_WRITE) + mode |= S_IWUGO & asb->s_owner_mask; + + if (attr & ADFS_NDA_PUBLIC_READ) + mode |= rmask & asb->s_other_mask; + + if (attr & ADFS_NDA_PUBLIC_WRITE) + mode |= S_IWUGO & asb->s_other_mask; + return mode; +} + +/* + * Convert Linux permission to ADFS attribute. We try to do the reverse + * of atts2mode, but there is not a 1:1 translation. + */ +static int adfs_mode2atts(struct super_block *sb, struct inode *inode, + umode_t ia_mode) +{ + struct adfs_sb_info *asb = ADFS_SB(sb); + umode_t mode; + int attr; + + /* FIXME: should we be able to alter a link? */ + if (S_ISLNK(inode->i_mode)) + return ADFS_I(inode)->attr; + + /* Directories do not have read/write permissions on the media */ + if (S_ISDIR(inode->i_mode)) + return ADFS_NDA_DIRECTORY; + + attr = 0; + mode = ia_mode & asb->s_owner_mask; + if (mode & S_IRUGO) + attr |= ADFS_NDA_OWNER_READ; + if (mode & S_IWUGO) + attr |= ADFS_NDA_OWNER_WRITE; + + mode = ia_mode & asb->s_other_mask; + mode &= ~asb->s_owner_mask; + if (mode & S_IRUGO) + attr |= ADFS_NDA_PUBLIC_READ; + if (mode & S_IWUGO) + attr |= ADFS_NDA_PUBLIC_WRITE; + + return attr; +} + +static const s64 nsec_unix_epoch_diff_risc_os_epoch = 2208988800000000000LL; + +/* + * Convert an ADFS time to Unix time. ADFS has a 40-bit centi-second time + * referenced to 1 Jan 1900 (til 2248) so we need to discard 2208988800 seconds + * of time to convert from RISC OS epoch to Unix epoch. + */ +static void +adfs_adfs2unix_time(struct timespec64 *tv, struct inode *inode) +{ + unsigned int high, low; + /* 01 Jan 1970 00:00:00 (Unix epoch) as nanoseconds since + * 01 Jan 1900 00:00:00 (RISC OS epoch) + */ + s64 nsec; + + if (!adfs_inode_is_stamped(inode)) + goto cur_time; + + high = ADFS_I(inode)->loadaddr & 0xFF; /* top 8 bits of timestamp */ + low = ADFS_I(inode)->execaddr; /* bottom 32 bits of timestamp */ + + /* convert 40-bit centi-seconds to 32-bit seconds + * going via nanoseconds to retain precision + */ + nsec = (((s64) high << 32) | (s64) low) * 10000000; /* cs to ns */ + + /* Files dated pre 01 Jan 1970 00:00:00. */ + if (nsec < nsec_unix_epoch_diff_risc_os_epoch) + goto too_early; + + /* convert from RISC OS to Unix epoch */ + nsec -= nsec_unix_epoch_diff_risc_os_epoch; + + *tv = ns_to_timespec64(nsec); + return; + + cur_time: + *tv = current_time(inode); + return; + + too_early: + tv->tv_sec = tv->tv_nsec = 0; + return; +} + +/* Convert an Unix time to ADFS time for an entry that is already stamped. */ +static void adfs_unix2adfs_time(struct inode *inode, + const struct timespec64 *ts) +{ + s64 cs, nsec = timespec64_to_ns(ts); + + /* convert from Unix to RISC OS epoch */ + nsec += nsec_unix_epoch_diff_risc_os_epoch; + + /* convert from nanoseconds to centiseconds */ + cs = div_s64(nsec, 10000000); + + cs = clamp_t(s64, cs, 0, 0xffffffffff); + + ADFS_I(inode)->loadaddr &= ~0xff; + ADFS_I(inode)->loadaddr |= (cs >> 32) & 0xff; + ADFS_I(inode)->execaddr = cs; +} + +/* + * Fill in the inode information from the object information. + * + * Note that this is an inode-less filesystem, so we can't use the inode + * number to reference the metadata on the media. Instead, we use the + * inode number to hold the object ID, which in turn will tell us where + * the data is held. We also save the parent object ID, and with these + * two, we can locate the metadata. + * + * This does mean that we rely on an objects parent remaining the same at + * all times - we cannot cope with a cross-directory rename (yet). + */ +struct inode * +adfs_iget(struct super_block *sb, struct object_info *obj) +{ + struct inode *inode; + + inode = new_inode(sb); + if (!inode) + goto out; + + inode->i_uid = ADFS_SB(sb)->s_uid; + inode->i_gid = ADFS_SB(sb)->s_gid; + inode->i_ino = obj->indaddr; + inode->i_size = obj->size; + set_nlink(inode, 2); + inode->i_blocks = (inode->i_size + sb->s_blocksize - 1) >> + sb->s_blocksize_bits; + + /* + * we need to save the parent directory ID so that + * write_inode can update the directory information + * for this file. This will need special handling + * for cross-directory renames. + */ + ADFS_I(inode)->parent_id = obj->parent_id; + ADFS_I(inode)->indaddr = obj->indaddr; + ADFS_I(inode)->loadaddr = obj->loadaddr; + ADFS_I(inode)->execaddr = obj->execaddr; + ADFS_I(inode)->attr = obj->attr; + + inode->i_mode = adfs_atts2mode(sb, inode); + adfs_adfs2unix_time(&inode->i_mtime, inode); + inode->i_atime = inode->i_mtime; + inode->i_ctime = inode->i_mtime; + + if (S_ISDIR(inode->i_mode)) { + inode->i_op = &adfs_dir_inode_operations; + inode->i_fop = &adfs_dir_operations; + } else if (S_ISREG(inode->i_mode)) { + inode->i_op = &adfs_file_inode_operations; + inode->i_fop = &adfs_file_operations; + inode->i_mapping->a_ops = &adfs_aops; + ADFS_I(inode)->mmu_private = inode->i_size; + } + + inode_fake_hash(inode); + +out: + return inode; +} + +/* + * Validate and convert a changed access mode/time to their ADFS equivalents. + * adfs_write_inode will actually write the information back to the directory + * later. + */ +int +adfs_notify_change(struct mnt_idmap *idmap, struct dentry *dentry, + struct iattr *attr) +{ + struct inode *inode = d_inode(dentry); + struct super_block *sb = inode->i_sb; + unsigned int ia_valid = attr->ia_valid; + int error; + + error = setattr_prepare(&nop_mnt_idmap, dentry, attr); + + /* + * we can't change the UID or GID of any file - + * we have a global UID/GID in the superblock + */ + if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, ADFS_SB(sb)->s_uid)) || + (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, ADFS_SB(sb)->s_gid))) + error = -EPERM; + + if (error) + goto out; + + /* XXX: this is missing some actual on-disk truncation.. */ + if (ia_valid & ATTR_SIZE) + truncate_setsize(inode, attr->ia_size); + + if (ia_valid & ATTR_MTIME && adfs_inode_is_stamped(inode)) { + adfs_unix2adfs_time(inode, &attr->ia_mtime); + adfs_adfs2unix_time(&inode->i_mtime, inode); + } + + /* + * FIXME: should we make these == to i_mtime since we don't + * have the ability to represent them in our filesystem? + */ + if (ia_valid & ATTR_ATIME) + inode->i_atime = attr->ia_atime; + if (ia_valid & ATTR_CTIME) + inode->i_ctime = attr->ia_ctime; + if (ia_valid & ATTR_MODE) { + ADFS_I(inode)->attr = adfs_mode2atts(sb, inode, attr->ia_mode); + inode->i_mode = adfs_atts2mode(sb, inode); + } + + /* + * FIXME: should we be marking this inode dirty even if + * we don't have any metadata to write back? + */ + if (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MODE)) + mark_inode_dirty(inode); +out: + return error; +} + +/* + * write an existing inode back to the directory, and therefore the disk. + * The adfs-specific inode data has already been updated by + * adfs_notify_change() + */ +int adfs_write_inode(struct inode *inode, struct writeback_control *wbc) +{ + struct super_block *sb = inode->i_sb; + struct object_info obj; + + obj.indaddr = ADFS_I(inode)->indaddr; + obj.name_len = 0; + obj.parent_id = ADFS_I(inode)->parent_id; + obj.loadaddr = ADFS_I(inode)->loadaddr; + obj.execaddr = ADFS_I(inode)->execaddr; + obj.attr = ADFS_I(inode)->attr; + obj.size = inode->i_size; + + return adfs_dir_update(sb, &obj, wbc->sync_mode == WB_SYNC_ALL); +} -- cgit v1.2.3