Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 623 insertions, 0 deletions

diff --git a/fs/ntfs3/namei.c b/fs/ntfs3/namei.c
new file mode 100644
index 000000000..407fe9239
--- /dev/null
+++ b/fs/ntfs3/namei.c
@@ -0,0 +1,623 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/nls.h>
+#include <linux/ctype.h>
+#include <linux/posix_acl.h>
+
+#include "debug.h"
+#include "ntfs.h"
+#include "ntfs_fs.h"
+
+/*
+ * fill_name_de - Format NTFS_DE in @buf.
+ */
+int fill_name_de(struct ntfs_sb_info *sbi, void *buf, const struct qstr *name,
+		 const struct cpu_str *uni)
+{
+	int err;
+	struct NTFS_DE *e = buf;
+	u16 data_size;
+	struct ATTR_FILE_NAME *fname = (struct ATTR_FILE_NAME *)(e + 1);
+
+#ifndef CONFIG_NTFS3_64BIT_CLUSTER
+	e->ref.high = fname->home.high = 0;
+#endif
+	if (uni) {
+#ifdef __BIG_ENDIAN
+		int ulen = uni->len;
+		__le16 *uname = fname->name;
+		const u16 *name_cpu = uni->name;
+
+		while (ulen--)
+			*uname++ = cpu_to_le16(*name_cpu++);
+#else
+		memcpy(fname->name, uni->name, uni->len * sizeof(u16));
+#endif
+		fname->name_len = uni->len;
+
+	} else {
+		/* Convert input string to unicode. */
+		err = ntfs_nls_to_utf16(sbi, name->name, name->len,
+					(struct cpu_str *)&fname->name_len,
+					NTFS_NAME_LEN, UTF16_LITTLE_ENDIAN);
+		if (err < 0)
+			return err;
+	}
+
+	fname->type = FILE_NAME_POSIX;
+	data_size = fname_full_size(fname);
+
+	e->size = cpu_to_le16(ALIGN(data_size, 8) + sizeof(struct NTFS_DE));
+	e->key_size = cpu_to_le16(data_size);
+	e->flags = 0;
+	e->res = 0;
+
+	return 0;
+}
+
+/*
+ * ntfs_lookup - inode_operations::lookup
+ */
+static struct dentry *ntfs_lookup(struct inode *dir, struct dentry *dentry,
+				  u32 flags)
+{
+	struct ntfs_inode *ni = ntfs_i(dir);
+	struct cpu_str *uni = __getname();
+	struct inode *inode;
+	int err;
+
+	if (!uni)
+		inode = ERR_PTR(-ENOMEM);
+	else {
+		err = ntfs_nls_to_utf16(ni->mi.sbi, dentry->d_name.name,
+					dentry->d_name.len, uni, NTFS_NAME_LEN,
+					UTF16_HOST_ENDIAN);
+		if (err < 0)
+			inode = ERR_PTR(err);
+		else {
+			ni_lock(ni);
+			inode = dir_search_u(dir, uni, NULL);
+			ni_unlock(ni);
+		}
+		__putname(uni);
+	}
+
+	return d_splice_alias(inode, dentry);
+}
+
+/*
+ * ntfs_create - inode_operations::create
+ */
+static int ntfs_create(struct mnt_idmap *idmap, struct inode *dir,
+		       struct dentry *dentry, umode_t mode, bool excl)
+{
+	struct inode *inode;
+
+	inode = ntfs_create_inode(idmap, dir, dentry, NULL, S_IFREG | mode,
+				  0, NULL, 0, NULL);
+
+	return IS_ERR(inode) ? PTR_ERR(inode) : 0;
+}
+
+/*
+ * ntfs_mknod
+ *
+ * inode_operations::mknod
+ */
+static int ntfs_mknod(struct mnt_idmap *idmap, struct inode *dir,
+		      struct dentry *dentry, umode_t mode, dev_t rdev)
+{
+	struct inode *inode;
+
+	inode = ntfs_create_inode(idmap, dir, dentry, NULL, mode, rdev,
+				  NULL, 0, NULL);
+
+	return IS_ERR(inode) ? PTR_ERR(inode) : 0;
+}
+
+/*
+ * ntfs_link - inode_operations::link
+ */
+static int ntfs_link(struct dentry *ode, struct inode *dir, struct dentry *de)
+{
+	int err;
+	struct inode *inode = d_inode(ode);
+	struct ntfs_inode *ni = ntfs_i(inode);
+
+	if (S_ISDIR(inode->i_mode))
+		return -EPERM;
+
+	if (inode->i_nlink >= NTFS_LINK_MAX)
+		return -EMLINK;
+
+	ni_lock_dir(ntfs_i(dir));
+	if (inode != dir)
+		ni_lock(ni);
+
+	inc_nlink(inode);
+	ihold(inode);
+
+	err = ntfs_link_inode(inode, de);
+
+	if (!err) {
+		dir->i_ctime = dir->i_mtime = inode->i_ctime =
+			current_time(dir);
+		mark_inode_dirty(inode);
+		mark_inode_dirty(dir);
+		d_instantiate(de, inode);
+	} else {
+		drop_nlink(inode);
+		iput(inode);
+	}
+
+	if (inode != dir)
+		ni_unlock(ni);
+	ni_unlock(ntfs_i(dir));
+
+	return err;
+}
+
+/*
+ * ntfs_unlink - inode_operations::unlink
+ */
+static int ntfs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	struct ntfs_inode *ni = ntfs_i(dir);
+	int err;
+
+	ni_lock_dir(ni);
+
+	err = ntfs_unlink_inode(dir, dentry);
+
+	ni_unlock(ni);
+
+	return err;
+}
+
+/*
+ * ntfs_symlink - inode_operations::symlink
+ */
+static int ntfs_symlink(struct mnt_idmap *idmap, struct inode *dir,
+			struct dentry *dentry, const char *symname)
+{
+	u32 size = strlen(symname);
+	struct inode *inode;
+
+	inode = ntfs_create_inode(idmap, dir, dentry, NULL, S_IFLNK | 0777,
+				  0, symname, size, NULL);
+
+	return IS_ERR(inode) ? PTR_ERR(inode) : 0;
+}
+
+/*
+ * ntfs_mkdir- inode_operations::mkdir
+ */
+static int ntfs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
+		      struct dentry *dentry, umode_t mode)
+{
+	struct inode *inode;
+
+	inode = ntfs_create_inode(idmap, dir, dentry, NULL, S_IFDIR | mode,
+				  0, NULL, 0, NULL);
+
+	return IS_ERR(inode) ? PTR_ERR(inode) : 0;
+}
+
+/*
+ * ntfs_rmdir - inode_operations::rmdir
+ */
+static int ntfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+	struct ntfs_inode *ni = ntfs_i(dir);
+	int err;
+
+	ni_lock_dir(ni);
+
+	err = ntfs_unlink_inode(dir, dentry);
+
+	ni_unlock(ni);
+
+	return err;
+}
+
+/*
+ * ntfs_rename - inode_operations::rename
+ */
+static int ntfs_rename(struct mnt_idmap *idmap, struct inode *dir,
+		       struct dentry *dentry, struct inode *new_dir,
+		       struct dentry *new_dentry, u32 flags)
+{
+	int err;
+	struct super_block *sb = dir->i_sb;
+	struct ntfs_sb_info *sbi = sb->s_fs_info;
+	struct ntfs_inode *dir_ni = ntfs_i(dir);
+	struct ntfs_inode *new_dir_ni = ntfs_i(new_dir);
+	struct inode *inode = d_inode(dentry);
+	struct ntfs_inode *ni = ntfs_i(inode);
+	struct inode *new_inode = d_inode(new_dentry);
+	struct NTFS_DE *de, *new_de;
+	bool is_same, is_bad;
+	/*
+	 * de		- memory of PATH_MAX bytes:
+	 * [0-1024)	- original name (dentry->d_name)
+	 * [1024-2048)	- paired to original name, usually DOS variant of dentry->d_name
+	 * [2048-3072)	- new name (new_dentry->d_name)
+	 */
+	static_assert(SIZEOF_ATTRIBUTE_FILENAME_MAX + SIZEOF_RESIDENT < 1024);
+	static_assert(SIZEOF_ATTRIBUTE_FILENAME_MAX + sizeof(struct NTFS_DE) <
+		      1024);
+	static_assert(PATH_MAX >= 4 * 1024);
+
+	if (flags & ~RENAME_NOREPLACE)
+		return -EINVAL;
+
+	is_same = dentry->d_name.len == new_dentry->d_name.len &&
+		  !memcmp(dentry->d_name.name, new_dentry->d_name.name,
+			  dentry->d_name.len);
+
+	if (is_same && dir == new_dir) {
+		/* Nothing to do. */
+		return 0;
+	}
+
+	if (ntfs_is_meta_file(sbi, inode->i_ino)) {
+		/* Should we print an error? */
+		return -EINVAL;
+	}
+
+	if (new_inode) {
+		/* Target name exists. Unlink it. */
+		dget(new_dentry);
+		ni_lock_dir(new_dir_ni);
+		err = ntfs_unlink_inode(new_dir, new_dentry);
+		ni_unlock(new_dir_ni);
+		dput(new_dentry);
+		if (err)
+			return err;
+	}
+
+	/* Allocate PATH_MAX bytes. */
+	de = __getname();
+	if (!de)
+		return -ENOMEM;
+
+	/* Translate dentry->d_name into unicode form. */
+	err = fill_name_de(sbi, de, &dentry->d_name, NULL);
+	if (err < 0)
+		goto out;
+
+	if (is_same) {
+		/* Reuse 'de'. */
+		new_de = de;
+	} else {
+		/* Translate new_dentry->d_name into unicode form. */
+		new_de = Add2Ptr(de, 2048);
+		err = fill_name_de(sbi, new_de, &new_dentry->d_name, NULL);
+		if (err < 0)
+			goto out;
+	}
+
+	ni_lock_dir(dir_ni);
+	ni_lock(ni);
+	if (dir_ni != new_dir_ni)
+		ni_lock_dir2(new_dir_ni);
+
+	is_bad = false;
+	err = ni_rename(dir_ni, new_dir_ni, ni, de, new_de, &is_bad);
+	if (is_bad) {
+		/* Restore after failed rename failed too. */
+		_ntfs_bad_inode(inode);
+	} else if (!err) {
+		inode->i_ctime = dir->i_ctime = dir->i_mtime =
+			current_time(dir);
+		mark_inode_dirty(inode);
+		mark_inode_dirty(dir);
+		if (dir != new_dir) {
+			new_dir->i_mtime = new_dir->i_ctime = dir->i_ctime;
+			mark_inode_dirty(new_dir);
+		}
+
+		if (IS_DIRSYNC(dir))
+			ntfs_sync_inode(dir);
+
+		if (IS_DIRSYNC(new_dir))
+			ntfs_sync_inode(inode);
+	}
+
+	if (dir_ni != new_dir_ni)
+		ni_unlock(new_dir_ni);
+	ni_unlock(ni);
+	ni_unlock(dir_ni);
+out:
+	__putname(de);
+	return err;
+}
+
+/*
+ * ntfs_atomic_open
+ *
+ * inode_operations::atomic_open
+ */
+static int ntfs_atomic_open(struct inode *dir, struct dentry *dentry,
+			    struct file *file, u32 flags, umode_t mode)
+{
+	int err;
+	struct inode *inode;
+	struct ntfs_fnd *fnd = NULL;
+	struct ntfs_inode *ni = ntfs_i(dir);
+	struct dentry *d = NULL;
+	struct cpu_str *uni = __getname();
+	bool locked = false;
+
+	if (!uni)
+		return -ENOMEM;
+
+	err = ntfs_nls_to_utf16(ni->mi.sbi, dentry->d_name.name,
+				dentry->d_name.len, uni, NTFS_NAME_LEN,
+				UTF16_HOST_ENDIAN);
+	if (err < 0)
+		goto out;
+
+#ifdef CONFIG_NTFS3_FS_POSIX_ACL
+	if (IS_POSIXACL(dir)) {
+		/* 
+		 * Load in cache current acl to avoid ni_lock(dir):
+		 * ntfs_create_inode -> ntfs_init_acl -> posix_acl_create ->
+		 * ntfs_get_acl -> ntfs_get_acl_ex -> ni_lock
+		 */
+		struct posix_acl *p = get_inode_acl(dir, ACL_TYPE_DEFAULT);
+
+		if (IS_ERR(p)) {
+			err = PTR_ERR(p);
+			goto out;
+		}
+		posix_acl_release(p);
+	}
+#endif
+
+	if (d_in_lookup(dentry)) {
+		ni_lock_dir(ni);
+		locked = true;
+		fnd = fnd_get();
+		if (!fnd) {
+			err = -ENOMEM;
+			goto out1;
+		}
+
+		d = d_splice_alias(dir_search_u(dir, uni, fnd), dentry);
+		if (IS_ERR(d)) {
+			err = PTR_ERR(d);
+			d = NULL;
+			goto out2;
+		}
+
+		if (d)
+			dentry = d;
+	}
+
+	if (!(flags & O_CREAT) || d_really_is_positive(dentry)) {
+		err = finish_no_open(file, d);
+		goto out2;
+	}
+
+	file->f_mode |= FMODE_CREATED;
+
+	/*
+	 * fnd contains tree's path to insert to.
+	 * If fnd is not NULL then dir is locked.
+	 */
+
+	/*
+	 * Unfortunately I don't know how to get here correct 'struct nameidata *nd'
+	 * or 'struct mnt_idmap *idmap'.
+	 * See atomic_open in fs/namei.c.
+	 * This is why xfstest/633 failed.
+	 * Looks like ntfs_atomic_open must accept 'struct mnt_idmap *idmap' as argument.
+	 */
+
+	inode = ntfs_create_inode(&nop_mnt_idmap, dir, dentry, uni, mode, 0,
+				  NULL, 0, fnd);
+	err = IS_ERR(inode) ? PTR_ERR(inode)
+			    : finish_open(file, dentry, ntfs_file_open);
+	dput(d);
+
+out2:
+	fnd_put(fnd);
+out1:
+	if (locked)
+		ni_unlock(ni);
+out:
+	__putname(uni);
+	return err;
+}
+
+struct dentry *ntfs3_get_parent(struct dentry *child)
+{
+	struct inode *inode = d_inode(child);
+	struct ntfs_inode *ni = ntfs_i(inode);
+
+	struct ATTR_LIST_ENTRY *le = NULL;
+	struct ATTRIB *attr = NULL;
+	struct ATTR_FILE_NAME *fname;
+
+	while ((attr = ni_find_attr(ni, attr, &le, ATTR_NAME, NULL, 0, NULL,
+				    NULL))) {
+		fname = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME);
+		if (!fname)
+			continue;
+
+		return d_obtain_alias(
+			ntfs_iget5(inode->i_sb, &fname->home, NULL));
+	}
+
+	return ERR_PTR(-ENOENT);
+}
+
+/*
+ * dentry_operations::d_hash
+ */
+static int ntfs_d_hash(const struct dentry *dentry, struct qstr *name)
+{
+	struct ntfs_sb_info *sbi;
+	const char *n = name->name;
+	unsigned int len = name->len;
+	unsigned long hash;
+	struct cpu_str *uni;
+	unsigned int c;
+	int err;
+
+	/* First try fast implementation. */
+	hash = init_name_hash(dentry);
+
+	for (;;) {
+		if (!len--) {
+			name->hash = end_name_hash(hash);
+			return 0;
+		}
+
+		c = *n++;
+		if (c >= 0x80)
+			break;
+
+		hash = partial_name_hash(toupper(c), hash);
+	}
+
+	/*
+	 * Try slow way with current upcase table
+	 */
+	uni = __getname();
+	if (!uni)
+		return -ENOMEM;
+
+	sbi = dentry->d_sb->s_fs_info;
+
+	err = ntfs_nls_to_utf16(sbi, name->name, name->len, uni, NTFS_NAME_LEN,
+				UTF16_HOST_ENDIAN);
+	if (err < 0)
+		goto out;
+
+	if (!err) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	hash = ntfs_names_hash(uni->name, uni->len, sbi->upcase,
+			       init_name_hash(dentry));
+	name->hash = end_name_hash(hash);
+	err = 0;
+
+out:
+	__putname(uni);
+	return err;
+}
+
+/*
+ * dentry_operations::d_compare
+ */
+static int ntfs_d_compare(const struct dentry *dentry, unsigned int len1,
+			  const char *str, const struct qstr *name)
+{
+	struct ntfs_sb_info *sbi;
+	int ret;
+	const char *n1 = str;
+	const char *n2 = name->name;
+	unsigned int len2 = name->len;
+	unsigned int lm = min(len1, len2);
+	unsigned char c1, c2;
+	struct cpu_str *uni1;
+	struct le_str *uni2;
+
+	/* First try fast implementation. */
+	for (;;) {
+		if (!lm--)
+			return len1 != len2;
+
+		if ((c1 = *n1++) == (c2 = *n2++))
+			continue;
+
+		if (c1 >= 0x80 || c2 >= 0x80)
+			break;
+
+		if (toupper(c1) != toupper(c2))
+			return 1;
+	}
+
+	/*
+	 * Try slow way with current upcase table
+	 */
+	sbi = dentry->d_sb->s_fs_info;
+	uni1 = __getname();
+	if (!uni1)
+		return -ENOMEM;
+
+	ret = ntfs_nls_to_utf16(sbi, str, len1, uni1, NTFS_NAME_LEN,
+				UTF16_HOST_ENDIAN);
+	if (ret < 0)
+		goto out;
+
+	if (!ret) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	uni2 = Add2Ptr(uni1, 2048);
+
+	ret = ntfs_nls_to_utf16(sbi, name->name, name->len,
+				(struct cpu_str *)uni2, NTFS_NAME_LEN,
+				UTF16_LITTLE_ENDIAN);
+	if (ret < 0)
+		goto out;
+
+	if (!ret) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = !ntfs_cmp_names_cpu(uni1, uni2, sbi->upcase, false) ? 0 : 1;
+
+out:
+	__putname(uni1);
+	return ret;
+}
+
+// clang-format off
+const struct inode_operations ntfs_dir_inode_operations = {
+	.lookup		= ntfs_lookup,
+	.create		= ntfs_create,
+	.link		= ntfs_link,
+	.unlink		= ntfs_unlink,
+	.symlink	= ntfs_symlink,
+	.mkdir		= ntfs_mkdir,
+	.rmdir		= ntfs_rmdir,
+	.mknod		= ntfs_mknod,
+	.rename		= ntfs_rename,
+	.permission	= ntfs_permission,
+	.get_inode_acl	= ntfs_get_acl,
+	.set_acl	= ntfs_set_acl,
+	.setattr	= ntfs3_setattr,
+	.getattr	= ntfs_getattr,
+	.listxattr	= ntfs_listxattr,
+	.atomic_open	= ntfs_atomic_open,
+	.fiemap		= ntfs_fiemap,
+};
+
+const struct inode_operations ntfs_special_inode_operations = {
+	.setattr	= ntfs3_setattr,
+	.getattr	= ntfs_getattr,
+	.listxattr	= ntfs_listxattr,
+	.get_inode_acl	= ntfs_get_acl,
+	.set_acl	= ntfs_set_acl,
+};
+
+const struct dentry_operations ntfs_dentry_ops = {
+	.d_hash		= ntfs_d_hash,
+	.d_compare	= ntfs_d_compare,
+};
+
+// clang-format on