Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 158 insertions, 0 deletions

diff --git a/fs/ntfs/object_id.c b/fs/ntfs/object_id.c
new file mode 100644
index 000000000..89002c375
--- /dev/null
+++ b/fs/ntfs/object_id.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pocessing of object ids
+ *
+ * Part of this file is based on code from the NTFS-3G.
+ *
+ * Copyright (c) 2009-2019 Jean-Pierre Andre
+ * Copyright (c) 2026 LG Electronics Co., Ltd.
+ */
+
+#include "ntfs.h"
+#include "index.h"
+#include "object_id.h"
+
+struct object_id_index_key {
+	union {
+		u32 alignment;
+		struct guid guid;
+	} object_id;
+} __packed;
+
+struct object_id_index_data {
+	__le64 file_id;
+	struct guid birth_volume_id;
+	struct guid birth_object_id;
+	struct guid domain_id;
+} __packed;
+
+/* Index entry in $Extend/$ObjId */
+struct object_id_index {
+	struct index_entry_header header;
+	struct object_id_index_key key;
+	struct object_id_index_data data;
+} __packed;
+
+__le16 objid_index_name[] = {cpu_to_le16('$'), cpu_to_le16('O'), 0};
+
+/*
+ * open_object_id_index - Open the $Extend/$ObjId file and its index
+ * @vol: NTFS volume structure
+ *
+ * Opens the $ObjId system file and retrieves its index context.
+ *
+ * Return: The index context if opened successfully, or NULL if an error
+ *	   occurred.
+ */
+static struct ntfs_index_context *open_object_id_index(struct ntfs_volume *vol)
+{
+	struct inode *dir_vi, *vi;
+	struct ntfs_inode *dir_ni;
+	struct ntfs_index_context *xo = NULL;
+	struct ntfs_name *name = NULL;
+	u64 mref;
+	int uname_len;
+	__le16 *uname;
+
+	uname_len = ntfs_nlstoucs(vol, "$ObjId", 6, &uname,
+			NTFS_MAX_NAME_LEN);
+	if (uname_len < 0)
+		return NULL;
+
+	/* do not use path_name_to inode - could reopen root */
+	dir_vi = ntfs_iget(vol->sb, FILE_Extend);
+	if (IS_ERR(dir_vi)) {
+		kmem_cache_free(ntfs_name_cache, uname);
+		return NULL;
+	}
+	dir_ni = NTFS_I(dir_vi);
+
+	mutex_lock_nested(&dir_ni->mrec_lock, NTFS_EXTEND_MUTEX_PARENT);
+	mref = ntfs_lookup_inode_by_name(dir_ni, uname, uname_len, &name);
+	mutex_unlock(&dir_ni->mrec_lock);
+	kfree(name);
+	kmem_cache_free(ntfs_name_cache, uname);
+	if (IS_ERR_MREF(mref))
+		goto put_dir_vi;
+
+	vi = ntfs_iget(vol->sb, MREF(mref));
+	if (IS_ERR(vi))
+		goto put_dir_vi;
+
+	xo = ntfs_index_ctx_get(NTFS_I(vi), objid_index_name, 2);
+	if (!xo)
+		iput(vi);
+put_dir_vi:
+	iput(dir_vi);
+	return xo;
+}
+
+
+/*
+ * remove_object_id_index - Remove an object id index entry if attribute present
+ * @ni: NTFS inode structure containing the attribute
+ * @xo:	Index context for the object id index
+ *
+ * Reads the existing object ID attribute and removes it from the index.
+ *
+ * Return: 0 on success, or a negative error code on failure.
+ */
+static int remove_object_id_index(struct ntfs_inode *ni, struct ntfs_index_context *xo)
+{
+	struct object_id_index_key key = {0};
+	s64 size;
+
+	if (ni->data_size == 0)
+		return -ENODATA;
+
+	/* read the existing object id attribute */
+	size = ntfs_inode_attr_pread(VFS_I(ni), 0, sizeof(struct guid),
+				     (char *)&key);
+	if (size != sizeof(struct guid))
+		return -ENODATA;
+
+	if (!ntfs_index_lookup(&key, sizeof(struct object_id_index_key), xo))
+		return ntfs_index_rm(xo);
+
+	return 0;
+}
+
+/*
+ * ntfs_delete_object_id_index - Delete an object_id index entry
+ * @ni:	NTFS inode structure
+ *
+ * Opens the object ID index and removes the entry corresponding to the inode.
+ *
+ * Return: 0 on success, or a negative error code on failure.
+ */
+int ntfs_delete_object_id_index(struct ntfs_inode *ni)
+{
+	struct ntfs_index_context *xo;
+	struct ntfs_inode *xoni;
+	struct inode *attr_vi;
+	int ret = 0;
+
+	attr_vi = ntfs_attr_iget(VFS_I(ni), AT_OBJECT_ID, AT_UNNAMED, 0);
+	if (IS_ERR(attr_vi))
+		return PTR_ERR(attr_vi);
+
+	/*
+	 * read the existing object id and un-index it
+	 */
+	xo = open_object_id_index(ni->vol);
+	if (xo) {
+		xoni = xo->idx_ni;
+		mutex_lock_nested(&xoni->mrec_lock, NTFS_EXTEND_MUTEX_PARENT);
+		ret = remove_object_id_index(NTFS_I(attr_vi), xo);
+		if (!ret) {
+			ntfs_index_entry_mark_dirty(xo);
+			mark_mft_record_dirty(xoni);
+		}
+		ntfs_index_ctx_put(xo);
+		mutex_unlock(&xoni->mrec_lock);
+		iput(VFS_I(xoni));
+	}
+
+	iput(attr_vi);
+	return ret;
+}