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, 256 insertions, 0 deletions

diff --git a/fs/udf/file.c b/fs/udf/file.c
new file mode 100644
index 000000000..57d11606a
--- /dev/null
+++ b/fs/udf/file.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * file.c
+ *
+ * PURPOSE
+ *  File handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * COPYRIGHT
+ *  (C) 1998-1999 Dave Boynton
+ *  (C) 1998-2004 Ben Fennema
+ *  (C) 1999-2000 Stelias Computing Inc
+ *
+ * HISTORY
+ *
+ *  10/02/98 dgb  Attempt to integrate into udf.o
+ *  10/07/98      Switched to using generic_readpage, etc., like isofs
+ *                And it works!
+ *  12/06/98 blf  Added udf_file_read. uses generic_file_read for all cases but
+ *                ICBTAG_FLAG_AD_IN_ICB.
+ *  04/06/99      64 bit file handling on 32 bit systems taken from ext2 file.c
+ *  05/12/99      Preliminary file write support
+ */
+
+#include "udfdecl.h"
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/kernel.h>
+#include <linux/string.h> /* memset */
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/filelock.h>
+#include <linux/pagemap.h>
+#include <linux/uio.h>
+
+#include "udf_i.h"
+#include "udf_sb.h"
+
+static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct inode *inode = file_inode(vma->vm_file);
+	struct address_space *mapping = inode->i_mapping;
+	struct folio *folio = page_folio(vmf->page);
+	loff_t size;
+	unsigned int end;
+	vm_fault_t ret = VM_FAULT_LOCKED;
+	int err;
+
+	sb_start_pagefault(inode->i_sb);
+	file_update_time(vma->vm_file);
+	filemap_invalidate_lock_shared(mapping);
+	folio_lock(folio);
+	size = i_size_read(inode);
+	if (folio->mapping != inode->i_mapping || folio_pos(folio) >= size) {
+		folio_unlock(folio);
+		ret = VM_FAULT_NOPAGE;
+		goto out_unlock;
+	}
+	/* Space is already allocated for in-ICB file */
+	if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+		goto out_dirty;
+	if (folio->index == size >> PAGE_SHIFT)
+		end = size & ~PAGE_MASK;
+	else
+		end = PAGE_SIZE;
+	err = __block_write_begin(folio, 0, end, udf_get_block);
+	if (err) {
+		folio_unlock(folio);
+		ret = vmf_fs_error(err);
+		goto out_unlock;
+	}
+
+	block_commit_write(folio, 0, end);
+out_dirty:
+	folio_mark_dirty(folio);
+	folio_wait_stable(folio);
+out_unlock:
+	filemap_invalidate_unlock_shared(mapping);
+	sb_end_pagefault(inode->i_sb);
+	return ret;
+}
+
+static const struct vm_operations_struct udf_file_vm_ops = {
+	.fault		= filemap_fault,
+	.map_pages	= filemap_map_pages,
+	.page_mkwrite	= udf_page_mkwrite,
+};
+
+static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	ssize_t retval;
+	struct file *file = iocb->ki_filp;
+	struct inode *inode = file_inode(file);
+	struct udf_inode_info *iinfo = UDF_I(inode);
+
+	inode_lock(inode);
+
+	retval = generic_write_checks(iocb, from);
+	if (retval <= 0)
+		goto out;
+
+	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
+	    inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
+				 iocb->ki_pos + iov_iter_count(from))) {
+		filemap_invalidate_lock(inode->i_mapping);
+		retval = udf_expand_file_adinicb(inode);
+		filemap_invalidate_unlock(inode->i_mapping);
+		if (retval)
+			goto out;
+	}
+
+	retval = __generic_file_write_iter(iocb, from);
+out:
+	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && retval > 0) {
+		down_write(&iinfo->i_data_sem);
+		iinfo->i_lenAlloc = inode->i_size;
+		up_write(&iinfo->i_data_sem);
+	}
+	inode_unlock(inode);
+
+	if (retval > 0) {
+		mark_inode_dirty(inode);
+		retval = generic_write_sync(iocb, retval);
+	}
+
+	return retval;
+}
+
+long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	long old_block, new_block;
+	int result;
+
+	if (file_permission(filp, MAY_READ) != 0) {
+		udf_debug("no permission to access inode %llu\n", inode->i_ino);
+		return -EPERM;
+	}
+
+	if (!arg && ((cmd == UDF_GETVOLIDENT) || (cmd == UDF_GETEASIZE) ||
+		     (cmd == UDF_RELOCATE_BLOCKS) || (cmd == UDF_GETEABLOCK))) {
+		udf_debug("invalid argument to udf_ioctl\n");
+		return -EINVAL;
+	}
+
+	switch (cmd) {
+	case UDF_GETVOLIDENT:
+		if (copy_to_user((char __user *)arg,
+				 UDF_SB(inode->i_sb)->s_volume_ident, 32))
+			return -EFAULT;
+		return 0;
+	case UDF_RELOCATE_BLOCKS:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+		if (get_user(old_block, (long __user *)arg))
+			return -EFAULT;
+		result = udf_relocate_blocks(inode->i_sb,
+						old_block, &new_block);
+		if (result == 0)
+			result = put_user(new_block, (long __user *)arg);
+		return result;
+	case UDF_GETEASIZE:
+		return put_user(UDF_I(inode)->i_lenEAttr, (int __user *)arg);
+	case UDF_GETEABLOCK:
+		return copy_to_user((char __user *)arg,
+				    UDF_I(inode)->i_data,
+				    UDF_I(inode)->i_lenEAttr) ? -EFAULT : 0;
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	return 0;
+}
+
+static int udf_release_file(struct inode *inode, struct file *filp)
+{
+	if (filp->f_mode & FMODE_WRITE &&
+	    atomic_read(&inode->i_writecount) == 1) {
+		/*
+		 * Grab i_mutex to avoid races with writes changing i_size
+		 * while we are running.
+		 */
+		inode_lock(inode);
+		down_write(&UDF_I(inode)->i_data_sem);
+		udf_discard_prealloc(inode);
+		udf_truncate_tail_extent(inode);
+		up_write(&UDF_I(inode)->i_data_sem);
+		inode_unlock(inode);
+	}
+	return 0;
+}
+
+static int udf_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	file_accessed(file);
+	vma->vm_ops = &udf_file_vm_ops;
+
+	return 0;
+}
+
+const struct file_operations udf_file_operations = {
+	.read_iter		= generic_file_read_iter,
+	.unlocked_ioctl		= udf_ioctl,
+	.open			= generic_file_open,
+	.mmap			= udf_file_mmap,
+	.write_iter		= udf_file_write_iter,
+	.release		= udf_release_file,
+	.fsync			= simple_fsync,
+	.splice_read		= filemap_splice_read,
+	.splice_write		= iter_file_splice_write,
+	.llseek			= generic_file_llseek,
+	.setlease		= generic_setlease,
+};
+
+static int udf_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+		       struct iattr *attr)
+{
+	struct inode *inode = d_inode(dentry);
+	struct super_block *sb = inode->i_sb;
+	int error;
+
+	error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
+	if (error)
+		return error;
+
+	if ((attr->ia_valid & ATTR_UID) &&
+	    UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET) &&
+	    !uid_eq(attr->ia_uid, UDF_SB(sb)->s_uid))
+		return -EPERM;
+	if ((attr->ia_valid & ATTR_GID) &&
+	    UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET) &&
+	    !gid_eq(attr->ia_gid, UDF_SB(sb)->s_gid))
+		return -EPERM;
+
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		filemap_invalidate_lock(inode->i_mapping);
+		error = udf_setsize(inode, attr->ia_size);
+		filemap_invalidate_unlock(inode->i_mapping);
+		if (error)
+			return error;
+	}
+
+	if (attr->ia_valid & ATTR_MODE)
+		udf_update_extra_perms(inode, attr->ia_mode);
+
+	setattr_copy(&nop_mnt_idmap, inode, attr);
+	mark_inode_dirty(inode);
+	if (IS_SYNC(inode))
+		sync_inode_metadata(inode, 1);
+	return 0;
+}
+
+const struct inode_operations udf_file_inode_operations = {
+	.setattr		= udf_setattr,
+};