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, 543 insertions, 0 deletions

diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
new file mode 100644
index 000000000..29f11e10a
--- /dev/null
+++ b/fs/affs/amigaffs.c
@@ -0,0 +1,543 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/fs/affs/amigaffs.c
+ *
+ *  (c) 1996  Hans-Joachim Widmaier - Rewritten
+ *
+ *  (C) 1993  Ray Burr - Amiga FFS filesystem.
+ *
+ *  Please send bug reports to: hjw@zvw.de
+ */
+
+#include <linux/math64.h>
+#include <linux/iversion.h>
+#include "affs.h"
+
+/*
+ * Functions for accessing Amiga-FFS structures.
+ */
+
+
+/* Insert a header block bh into the directory dir
+ * caller must hold AFFS_DIR->i_hash_lock!
+ */
+
+int
+affs_insert_hash(struct inode *dir, struct buffer_head *bh)
+{
+	struct super_block *sb = dir->i_sb;
+	struct buffer_head *dir_bh;
+	u32 ino, hash_ino;
+	int offset;
+
+	ino = bh->b_blocknr;
+	offset = affs_hash_name(sb, AFFS_TAIL(sb, bh)->name + 1, AFFS_TAIL(sb, bh)->name[0]);
+
+	pr_debug("%s(dir=%lu, ino=%d)\n", __func__, dir->i_ino, ino);
+
+	dir_bh = affs_bread(sb, dir->i_ino);
+	if (!dir_bh)
+		return -EIO;
+
+	hash_ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[offset]);
+	while (hash_ino) {
+		affs_brelse(dir_bh);
+		dir_bh = affs_bread(sb, hash_ino);
+		if (!dir_bh)
+			return -EIO;
+		hash_ino = be32_to_cpu(AFFS_TAIL(sb, dir_bh)->hash_chain);
+	}
+	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
+	AFFS_TAIL(sb, bh)->hash_chain = 0;
+	affs_fix_checksum(sb, bh);
+
+	if (dir->i_ino == dir_bh->b_blocknr)
+		AFFS_HEAD(dir_bh)->table[offset] = cpu_to_be32(ino);
+	else
+		AFFS_TAIL(sb, dir_bh)->hash_chain = cpu_to_be32(ino);
+
+	affs_adjust_checksum(dir_bh, ino);
+	mark_buffer_dirty_inode(dir_bh, dir);
+	affs_brelse(dir_bh);
+
+	dir->i_mtime = dir->i_ctime = current_time(dir);
+	inode_inc_iversion(dir);
+	mark_inode_dirty(dir);
+
+	return 0;
+}
+
+/* Remove a header block from its directory.
+ * caller must hold AFFS_DIR->i_hash_lock!
+ */
+
+int
+affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh)
+{
+	struct super_block *sb;
+	struct buffer_head *bh;
+	u32 rem_ino, hash_ino;
+	__be32 ino;
+	int offset, retval;
+
+	sb = dir->i_sb;
+	rem_ino = rem_bh->b_blocknr;
+	offset = affs_hash_name(sb, AFFS_TAIL(sb, rem_bh)->name+1, AFFS_TAIL(sb, rem_bh)->name[0]);
+	pr_debug("%s(dir=%lu, ino=%d, hashval=%d)\n", __func__, dir->i_ino,
+		 rem_ino, offset);
+
+	bh = affs_bread(sb, dir->i_ino);
+	if (!bh)
+		return -EIO;
+
+	retval = -ENOENT;
+	hash_ino = be32_to_cpu(AFFS_HEAD(bh)->table[offset]);
+	while (hash_ino) {
+		if (hash_ino == rem_ino) {
+			ino = AFFS_TAIL(sb, rem_bh)->hash_chain;
+			if (dir->i_ino == bh->b_blocknr)
+				AFFS_HEAD(bh)->table[offset] = ino;
+			else
+				AFFS_TAIL(sb, bh)->hash_chain = ino;
+			affs_adjust_checksum(bh, be32_to_cpu(ino) - hash_ino);
+			mark_buffer_dirty_inode(bh, dir);
+			AFFS_TAIL(sb, rem_bh)->parent = 0;
+			retval = 0;
+			break;
+		}
+		affs_brelse(bh);
+		bh = affs_bread(sb, hash_ino);
+		if (!bh)
+			return -EIO;
+		hash_ino = be32_to_cpu(AFFS_TAIL(sb, bh)->hash_chain);
+	}
+
+	affs_brelse(bh);
+
+	dir->i_mtime = dir->i_ctime = current_time(dir);
+	inode_inc_iversion(dir);
+	mark_inode_dirty(dir);
+
+	return retval;
+}
+
+static void
+affs_fix_dcache(struct inode *inode, u32 entry_ino)
+{
+	struct dentry *dentry;
+	spin_lock(&inode->i_lock);
+	hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
+		if (entry_ino == (u32)(long)dentry->d_fsdata) {
+			dentry->d_fsdata = (void *)inode->i_ino;
+			break;
+		}
+	}
+	spin_unlock(&inode->i_lock);
+}
+
+
+/* Remove header from link chain */
+
+static int
+affs_remove_link(struct dentry *dentry)
+{
+	struct inode *dir, *inode = d_inode(dentry);
+	struct super_block *sb = inode->i_sb;
+	struct buffer_head *bh, *link_bh = NULL;
+	u32 link_ino, ino;
+	int retval;
+
+	pr_debug("%s(key=%ld)\n", __func__, inode->i_ino);
+	retval = -EIO;
+	bh = affs_bread(sb, inode->i_ino);
+	if (!bh)
+		goto done;
+
+	link_ino = (u32)(long)dentry->d_fsdata;
+	if (inode->i_ino == link_ino) {
+		/* we can't remove the head of the link, as its blocknr is still used as ino,
+		 * so we remove the block of the first link instead.
+		 */ 
+		link_ino = be32_to_cpu(AFFS_TAIL(sb, bh)->link_chain);
+		link_bh = affs_bread(sb, link_ino);
+		if (!link_bh)
+			goto done;
+
+		dir = affs_iget(sb, be32_to_cpu(AFFS_TAIL(sb, link_bh)->parent));
+		if (IS_ERR(dir)) {
+			retval = PTR_ERR(dir);
+			goto done;
+		}
+
+		affs_lock_dir(dir);
+		/*
+		 * if there's a dentry for that block, make it
+		 * refer to inode itself.
+		 */
+		affs_fix_dcache(inode, link_ino);
+		retval = affs_remove_hash(dir, link_bh);
+		if (retval) {
+			affs_unlock_dir(dir);
+			goto done;
+		}
+		mark_buffer_dirty_inode(link_bh, inode);
+
+		memcpy(AFFS_TAIL(sb, bh)->name, AFFS_TAIL(sb, link_bh)->name, 32);
+		retval = affs_insert_hash(dir, bh);
+		if (retval) {
+			affs_unlock_dir(dir);
+			goto done;
+		}
+		mark_buffer_dirty_inode(bh, inode);
+
+		affs_unlock_dir(dir);
+		iput(dir);
+	} else {
+		link_bh = affs_bread(sb, link_ino);
+		if (!link_bh)
+			goto done;
+	}
+
+	while ((ino = be32_to_cpu(AFFS_TAIL(sb, bh)->link_chain)) != 0) {
+		if (ino == link_ino) {
+			__be32 ino2 = AFFS_TAIL(sb, link_bh)->link_chain;
+			AFFS_TAIL(sb, bh)->link_chain = ino2;
+			affs_adjust_checksum(bh, be32_to_cpu(ino2) - link_ino);
+			mark_buffer_dirty_inode(bh, inode);
+			retval = 0;
+			/* Fix the link count, if bh is a normal header block without links */
+			switch (be32_to_cpu(AFFS_TAIL(sb, bh)->stype)) {
+			case ST_LINKDIR:
+			case ST_LINKFILE:
+				break;
+			default:
+				if (!AFFS_TAIL(sb, bh)->link_chain)
+					set_nlink(inode, 1);
+			}
+			affs_free_block(sb, link_ino);
+			goto done;
+		}
+		affs_brelse(bh);
+		bh = affs_bread(sb, ino);
+		if (!bh)
+			goto done;
+	}
+	retval = -ENOENT;
+done:
+	affs_brelse(link_bh);
+	affs_brelse(bh);
+	return retval;
+}
+
+
+static int
+affs_empty_dir(struct inode *inode)
+{
+	struct super_block *sb = inode->i_sb;
+	struct buffer_head *bh;
+	int retval, size;
+
+	retval = -EIO;
+	bh = affs_bread(sb, inode->i_ino);
+	if (!bh)
+		goto done;
+
+	retval = -ENOTEMPTY;
+	for (size = AFFS_SB(sb)->s_hashsize - 1; size >= 0; size--)
+		if (AFFS_HEAD(bh)->table[size])
+			goto not_empty;
+	retval = 0;
+not_empty:
+	affs_brelse(bh);
+done:
+	return retval;
+}
+
+
+/* Remove a filesystem object. If the object to be removed has
+ * links to it, one of the links must be changed to inherit
+ * the file or directory. As above, any inode will do.
+ * The buffer will not be freed. If the header is a link, the
+ * block will be marked as free.
+ * This function returns a negative error number in case of
+ * an error, else 0 if the inode is to be deleted or 1 if not.
+ */
+
+int
+affs_remove_header(struct dentry *dentry)
+{
+	struct super_block *sb;
+	struct inode *inode, *dir;
+	struct buffer_head *bh = NULL;
+	int retval;
+
+	dir = d_inode(dentry->d_parent);
+	sb = dir->i_sb;
+
+	retval = -ENOENT;
+	inode = d_inode(dentry);
+	if (!inode)
+		goto done;
+
+	pr_debug("%s(key=%ld)\n", __func__, inode->i_ino);
+	retval = -EIO;
+	bh = affs_bread(sb, (u32)(long)dentry->d_fsdata);
+	if (!bh)
+		goto done;
+
+	affs_lock_link(inode);
+	affs_lock_dir(dir);
+	switch (be32_to_cpu(AFFS_TAIL(sb, bh)->stype)) {
+	case ST_USERDIR:
+		/* if we ever want to support links to dirs
+		 * i_hash_lock of the inode must only be
+		 * taken after some checks
+		 */
+		affs_lock_dir(inode);
+		retval = affs_empty_dir(inode);
+		affs_unlock_dir(inode);
+		if (retval)
+			goto done_unlock;
+		break;
+	default:
+		break;
+	}
+
+	retval = affs_remove_hash(dir, bh);
+	if (retval)
+		goto done_unlock;
+	mark_buffer_dirty_inode(bh, inode);
+
+	affs_unlock_dir(dir);
+
+	if (inode->i_nlink > 1)
+		retval = affs_remove_link(dentry);
+	else
+		clear_nlink(inode);
+	affs_unlock_link(inode);
+	inode->i_ctime = current_time(inode);
+	mark_inode_dirty(inode);
+
+done:
+	affs_brelse(bh);
+	return retval;
+
+done_unlock:
+	affs_unlock_dir(dir);
+	affs_unlock_link(inode);
+	goto done;
+}
+
+/* Checksum a block, do various consistency checks and optionally return
+   the blocks type number.  DATA points to the block.  If their pointers
+   are non-null, *PTYPE and *STYPE are set to the primary and secondary
+   block types respectively, *HASHSIZE is set to the size of the hashtable
+   (which lets us calculate the block size).
+   Returns non-zero if the block is not consistent. */
+
+u32
+affs_checksum_block(struct super_block *sb, struct buffer_head *bh)
+{
+	__be32 *ptr = (__be32 *)bh->b_data;
+	u32 sum;
+	int bsize;
+
+	sum = 0;
+	for (bsize = sb->s_blocksize / sizeof(__be32); bsize > 0; bsize--)
+		sum += be32_to_cpu(*ptr++);
+	return sum;
+}
+
+/*
+ * Calculate the checksum of a disk block and store it
+ * at the indicated position.
+ */
+
+void
+affs_fix_checksum(struct super_block *sb, struct buffer_head *bh)
+{
+	int cnt = sb->s_blocksize / sizeof(__be32);
+	__be32 *ptr = (__be32 *)bh->b_data;
+	u32 checksum;
+	__be32 *checksumptr;
+
+	checksumptr = ptr + 5;
+	*checksumptr = 0;
+	for (checksum = 0; cnt > 0; ptr++, cnt--)
+		checksum += be32_to_cpu(*ptr);
+	*checksumptr = cpu_to_be32(-checksum);
+}
+
+void
+affs_secs_to_datestamp(time64_t secs, struct affs_date *ds)
+{
+	u32	 days;
+	u32	 minute;
+	s32	 rem;
+
+	secs -= sys_tz.tz_minuteswest * 60 + AFFS_EPOCH_DELTA;
+	if (secs < 0)
+		secs = 0;
+	days    = div_s64_rem(secs, 86400, &rem);
+	minute  = rem / 60;
+	rem    -= minute * 60;
+
+	ds->days = cpu_to_be32(days);
+	ds->mins = cpu_to_be32(minute);
+	ds->ticks = cpu_to_be32(rem * 50);
+}
+
+umode_t
+affs_prot_to_mode(u32 prot)
+{
+	umode_t mode = 0;
+
+	if (!(prot & FIBF_NOWRITE))
+		mode |= 0200;
+	if (!(prot & FIBF_NOREAD))
+		mode |= 0400;
+	if (!(prot & FIBF_NOEXECUTE))
+		mode |= 0100;
+	if (prot & FIBF_GRP_WRITE)
+		mode |= 0020;
+	if (prot & FIBF_GRP_READ)
+		mode |= 0040;
+	if (prot & FIBF_GRP_EXECUTE)
+		mode |= 0010;
+	if (prot & FIBF_OTR_WRITE)
+		mode |= 0002;
+	if (prot & FIBF_OTR_READ)
+		mode |= 0004;
+	if (prot & FIBF_OTR_EXECUTE)
+		mode |= 0001;
+
+	return mode;
+}
+
+void
+affs_mode_to_prot(struct inode *inode)
+{
+	u32 prot = AFFS_I(inode)->i_protect;
+	umode_t mode = inode->i_mode;
+
+	/*
+	 * First, clear all RWED bits for owner, group, other.
+	 * Then, recalculate them afresh.
+	 *
+	 * We'll always clear the delete-inhibit bit for the owner, as that is
+	 * the classic single-user mode AmigaOS protection bit and we need to
+	 * stay compatible with all scenarios.
+	 *
+	 * Since multi-user AmigaOS is an extension, we'll only set the
+	 * delete-allow bit if any of the other bits in the same user class
+	 * (group/other) are used.
+	 */
+	prot &= ~(FIBF_NOEXECUTE | FIBF_NOREAD
+		  | FIBF_NOWRITE | FIBF_NODELETE
+		  | FIBF_GRP_EXECUTE | FIBF_GRP_READ
+		  | FIBF_GRP_WRITE   | FIBF_GRP_DELETE
+		  | FIBF_OTR_EXECUTE | FIBF_OTR_READ
+		  | FIBF_OTR_WRITE   | FIBF_OTR_DELETE);
+
+	/* Classic single-user AmigaOS flags. These are inverted. */
+	if (!(mode & 0100))
+		prot |= FIBF_NOEXECUTE;
+	if (!(mode & 0400))
+		prot |= FIBF_NOREAD;
+	if (!(mode & 0200))
+		prot |= FIBF_NOWRITE;
+
+	/* Multi-user extended flags. Not inverted. */
+	if (mode & 0010)
+		prot |= FIBF_GRP_EXECUTE;
+	if (mode & 0040)
+		prot |= FIBF_GRP_READ;
+	if (mode & 0020)
+		prot |= FIBF_GRP_WRITE;
+	if (mode & 0070)
+		prot |= FIBF_GRP_DELETE;
+
+	if (mode & 0001)
+		prot |= FIBF_OTR_EXECUTE;
+	if (mode & 0004)
+		prot |= FIBF_OTR_READ;
+	if (mode & 0002)
+		prot |= FIBF_OTR_WRITE;
+	if (mode & 0007)
+		prot |= FIBF_OTR_DELETE;
+
+	AFFS_I(inode)->i_protect = prot;
+}
+
+void
+affs_error(struct super_block *sb, const char *function, const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	pr_crit("error (device %s): %s(): %pV\n", sb->s_id, function, &vaf);
+	if (!sb_rdonly(sb))
+		pr_warn("Remounting filesystem read-only\n");
+	sb->s_flags |= SB_RDONLY;
+	va_end(args);
+}
+
+void
+affs_warning(struct super_block *sb, const char *function, const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	pr_warn("(device %s): %s(): %pV\n", sb->s_id, function, &vaf);
+	va_end(args);
+}
+
+bool
+affs_nofilenametruncate(const struct dentry *dentry)
+{
+	return affs_test_opt(AFFS_SB(dentry->d_sb)->s_flags, SF_NO_TRUNCATE);
+}
+
+/* Check if the name is valid for a affs object. */
+
+int
+affs_check_name(const unsigned char *name, int len, bool notruncate)
+{
+	int	 i;
+
+	if (len > AFFSNAMEMAX) {
+		if (notruncate)
+			return -ENAMETOOLONG;
+		len = AFFSNAMEMAX;
+	}
+	for (i = 0; i < len; i++) {
+		if (name[i] < ' ' || name[i] == ':'
+		    || (name[i] > 0x7e && name[i] < 0xa0))
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* This function copies name to bstr, with at most 30
+ * characters length. The bstr will be prepended by
+ * a length byte.
+ * NOTE: The name will must be already checked by
+ *       affs_check_name()!
+ */
+
+int
+affs_copy_name(unsigned char *bstr, struct dentry *dentry)
+{
+	u32 len = min(dentry->d_name.len, AFFSNAMEMAX);
+
+	*bstr++ = len;
+	memcpy(bstr, dentry->d_name.name, len);
+	return len;
+}