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/ufs/ialloc.c | 355 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 355 insertions(+) create mode 100644 fs/ufs/ialloc.c (limited to 'fs/ufs/ialloc.c') diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c new file mode 100644 index 000000000..06bd84d55 --- /dev/null +++ b/fs/ufs/ialloc.c @@ -0,0 +1,355 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/ufs/ialloc.c + * + * Copyright (c) 1998 + * Daniel Pirkl + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/ialloc.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * BSD ufs-inspired inode and directory allocation by + * Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + * + * UFS2 write support added by + * Evgeniy Dushistov , 2007 + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ufs_fs.h" +#include "ufs.h" +#include "swab.h" +#include "util.h" + +/* + * NOTE! When we get the inode, we're the only people + * that have access to it, and as such there are no + * race conditions we have to worry about. The inode + * is not on the hash-lists, and it cannot be reached + * through the filesystem because the directory entry + * has been deleted earlier. + * + * HOWEVER: we must make sure that we get no aliases, + * which means that we have to call "clear_inode()" + * _before_ we mark the inode not in use in the inode + * bitmaps. Otherwise a newly created file might use + * the same inode number (not actually the same pointer + * though), and then we'd have two inodes sharing the + * same inode number and space on the harddisk. + */ +void ufs_free_inode (struct inode * inode) +{ + struct super_block * sb; + struct ufs_sb_private_info * uspi; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + int is_directory; + unsigned ino, cg, bit; + + UFSD("ENTER, ino %lu\n", inode->i_ino); + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + ino = inode->i_ino; + + mutex_lock(&UFS_SB(sb)->s_lock); + + if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) { + ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino); + mutex_unlock(&UFS_SB(sb)->s_lock); + return; + } + + cg = ufs_inotocg (ino); + bit = ufs_inotocgoff (ino); + ucpi = ufs_load_cylinder (sb, cg); + if (!ucpi) { + mutex_unlock(&UFS_SB(sb)->s_lock); + return; + } + ucg = ubh_get_ucg(UCPI_UBH(ucpi)); + if (!ufs_cg_chkmagic(sb, ucg)) + ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number"); + + ucg->cg_time = ufs_get_seconds(sb); + + is_directory = S_ISDIR(inode->i_mode); + + if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit)) + ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino); + else { + ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit); + if (ino < ucpi->c_irotor) + ucpi->c_irotor = ino; + fs32_add(sb, &ucg->cg_cs.cs_nifree, 1); + uspi->cs_total.cs_nifree++; + fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1); + + if (is_directory) { + fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1); + uspi->cs_total.cs_ndir--; + fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1); + } + } + + ubh_mark_buffer_dirty (USPI_UBH(uspi)); + ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); + if (sb->s_flags & SB_SYNCHRONOUS) + ubh_sync_block(UCPI_UBH(ucpi)); + + ufs_mark_sb_dirty(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); + UFSD("EXIT\n"); +} + +/* + * Nullify new chunk of inodes, + * BSD people also set ui_gen field of inode + * during nullification, but we not care about + * that because of linux ufs do not support NFS + */ +static void ufs2_init_inodes_chunk(struct super_block *sb, + struct ufs_cg_private_info *ucpi, + struct ufs_cylinder_group *ucg) +{ + struct buffer_head *bh; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + sector_t beg = uspi->s_sbbase + + ufs_inotofsba(ucpi->c_cgx * uspi->s_ipg + + fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk)); + sector_t end = beg + uspi->s_fpb; + + UFSD("ENTER cgno %d\n", ucpi->c_cgx); + + for (; beg < end; ++beg) { + bh = sb_getblk(sb, beg); + lock_buffer(bh); + memset(bh->b_data, 0, sb->s_blocksize); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + unlock_buffer(bh); + if (sb->s_flags & SB_SYNCHRONOUS) + sync_dirty_buffer(bh); + brelse(bh); + } + + fs32_add(sb, &ucg->cg_u.cg_u2.cg_initediblk, uspi->s_inopb); + ubh_mark_buffer_dirty(UCPI_UBH(ucpi)); + if (sb->s_flags & SB_SYNCHRONOUS) + ubh_sync_block(UCPI_UBH(ucpi)); + + UFSD("EXIT\n"); +} + +/* + * There are two policies for allocating an inode. If the new inode is + * a directory, then a forward search is made for a block group with both + * free space and a low directory-to-inode ratio; if that fails, then of + * the groups with above-average free space, that group with the fewest + * directories already is chosen. + * + * For other inodes, search forward from the parent directory's block + * group to find a free inode. + */ +struct inode *ufs_new_inode(struct inode *dir, umode_t mode) +{ + struct super_block * sb; + struct ufs_sb_info * sbi; + struct ufs_sb_private_info * uspi; + struct ufs_cg_private_info * ucpi; + struct ufs_cylinder_group * ucg; + struct inode * inode; + struct timespec64 ts; + unsigned cg, bit, i, j, start; + struct ufs_inode_info *ufsi; + int err = -ENOSPC; + + UFSD("ENTER\n"); + + /* Cannot create files in a deleted directory */ + if (!dir || !dir->i_nlink) + return ERR_PTR(-EPERM); + sb = dir->i_sb; + inode = new_inode(sb); + if (!inode) + return ERR_PTR(-ENOMEM); + ufsi = UFS_I(inode); + sbi = UFS_SB(sb); + uspi = sbi->s_uspi; + + mutex_lock(&sbi->s_lock); + + /* + * Try to place the inode in its parent directory + */ + i = ufs_inotocg(dir->i_ino); + if (sbi->fs_cs(i).cs_nifree) { + cg = i; + goto cg_found; + } + + /* + * Use a quadratic hash to find a group with a free inode + */ + for ( j = 1; j < uspi->s_ncg; j <<= 1 ) { + i += j; + if (i >= uspi->s_ncg) + i -= uspi->s_ncg; + if (sbi->fs_cs(i).cs_nifree) { + cg = i; + goto cg_found; + } + } + + /* + * That failed: try linear search for a free inode + */ + i = ufs_inotocg(dir->i_ino) + 1; + for (j = 2; j < uspi->s_ncg; j++) { + i++; + if (i >= uspi->s_ncg) + i = 0; + if (sbi->fs_cs(i).cs_nifree) { + cg = i; + goto cg_found; + } + } + + goto failed; + +cg_found: + ucpi = ufs_load_cylinder (sb, cg); + if (!ucpi) { + err = -EIO; + goto failed; + } + ucg = ubh_get_ucg(UCPI_UBH(ucpi)); + if (!ufs_cg_chkmagic(sb, ucg)) + ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number"); + + start = ucpi->c_irotor; + bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start); + if (!(bit < uspi->s_ipg)) { + bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start); + if (!(bit < start)) { + ufs_error (sb, "ufs_new_inode", + "cylinder group %u corrupted - error in inode bitmap\n", cg); + err = -EIO; + goto failed; + } + } + UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg); + if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit)) + ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit); + else { + ufs_panic (sb, "ufs_new_inode", "internal error"); + err = -EIO; + goto failed; + } + + if (uspi->fs_magic == UFS2_MAGIC) { + u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk); + + if (bit + uspi->s_inopb > initediblk && + initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk)) + ufs2_init_inodes_chunk(sb, ucpi, ucg); + } + + fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1); + uspi->cs_total.cs_nifree--; + fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1); + + if (S_ISDIR(mode)) { + fs32_add(sb, &ucg->cg_cs.cs_ndir, 1); + uspi->cs_total.cs_ndir++; + fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1); + } + ubh_mark_buffer_dirty (USPI_UBH(uspi)); + ubh_mark_buffer_dirty (UCPI_UBH(ucpi)); + if (sb->s_flags & SB_SYNCHRONOUS) + ubh_sync_block(UCPI_UBH(ucpi)); + ufs_mark_sb_dirty(sb); + + inode->i_ino = cg * uspi->s_ipg + bit; + inode_init_owner(&nop_mnt_idmap, inode, dir, mode); + inode->i_blocks = 0; + inode->i_generation = 0; + inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); + ufsi->i_flags = UFS_I(dir)->i_flags; + ufsi->i_lastfrag = 0; + ufsi->i_shadow = 0; + ufsi->i_osync = 0; + ufsi->i_oeftflag = 0; + ufsi->i_dir_start_lookup = 0; + memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1)); + if (insert_inode_locked(inode) < 0) { + err = -EIO; + goto failed; + } + mark_inode_dirty(inode); + + if (uspi->fs_magic == UFS2_MAGIC) { + struct buffer_head *bh; + struct ufs2_inode *ufs2_inode; + + /* + * setup birth date, we do it here because of there is no sense + * to hold it in struct ufs_inode_info, and lose 64 bit + */ + bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); + if (!bh) { + ufs_warning(sb, "ufs_read_inode", + "unable to read inode %lu\n", + inode->i_ino); + err = -EIO; + goto fail_remove_inode; + } + lock_buffer(bh); + ufs2_inode = (struct ufs2_inode *)bh->b_data; + ufs2_inode += ufs_inotofsbo(inode->i_ino); + ktime_get_real_ts64(&ts); + ufs2_inode->ui_birthtime = cpu_to_fs64(sb, ts.tv_sec); + ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, ts.tv_nsec); + mark_buffer_dirty(bh); + unlock_buffer(bh); + if (sb->s_flags & SB_SYNCHRONOUS) + sync_dirty_buffer(bh); + brelse(bh); + } + mutex_unlock(&sbi->s_lock); + + UFSD("allocating inode %lu\n", inode->i_ino); + UFSD("EXIT\n"); + return inode; + +fail_remove_inode: + mutex_unlock(&sbi->s_lock); + clear_nlink(inode); + discard_new_inode(inode); + UFSD("EXIT (FAILED): err %d\n", err); + return ERR_PTR(err); +failed: + mutex_unlock(&sbi->s_lock); + make_bad_inode(inode); + iput (inode); + UFSD("EXIT (FAILED): err %d\n", err); + return ERR_PTR(err); +} -- cgit v1.2.3