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, 538 insertions, 0 deletions

diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
new file mode 100644
index 000000000..06e3a848b
--- /dev/null
+++ b/fs/bfs/inode.c
@@ -0,0 +1,538 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *	fs/bfs/inode.c
+ *	BFS superblock and inode operations.
+ *	Copyright (C) 1999-2018 Tigran Aivazian <aivazian.tigran@gmail.com>
+ *	From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds.
+ *	Made endianness-clean by Andrew Stribblehill <ads@wompom.org>, 2005.
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/writeback.h>
+#include <linux/uio.h>
+#include <linux/uaccess.h>
+#include <linux/fs_context.h>
+#include "bfs.h"
+
+MODULE_AUTHOR("Tigran Aivazian <aivazian.tigran@gmail.com>");
+MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux");
+MODULE_LICENSE("GPL");
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define dprintf(x...)	printf(x)
+#else
+#define dprintf(x...)
+#endif
+
+struct inode *bfs_iget(struct super_block *sb, unsigned long ino)
+{
+	struct bfs_inode *di;
+	struct inode *inode;
+	struct buffer_head *bh;
+	int block, off;
+
+	inode = iget_locked(sb, ino);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode_state_read_once(inode) & I_NEW))
+		return inode;
+
+	if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) {
+		printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino);
+		goto error;
+	}
+
+	block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
+	bh = sb_bread(inode->i_sb, block);
+	if (!bh) {
+		printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id,
+									ino);
+		goto error;
+	}
+
+	off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
+	di = (struct bfs_inode *)bh->b_data + off;
+
+	/*
+	 * https://martin.hinner.info/fs/bfs/bfs-structure.html explains that
+	 * BFS in SCO UnixWare environment used only lower 9 bits of di->i_mode
+	 * value. This means that, although bfs_write_inode() saves whole
+	 * inode->i_mode bits (which include S_IFMT bits and S_IS{UID,GID,VTX}
+	 * bits), middle 7 bits of di->i_mode value can be garbage when these
+	 * bits were not saved by bfs_write_inode().
+	 * Since we can't tell whether middle 7 bits are garbage, use only
+	 * lower 12 bits (i.e. tolerate S_IS{UID,GID,VTX} bits possibly being
+	 * garbage) and reconstruct S_IFMT bits for Linux environment from
+	 * di->i_vtype value.
+	 */
+	inode->i_mode = 0x00000FFF & le32_to_cpu(di->i_mode);
+	if (le32_to_cpu(di->i_vtype) == BFS_VDIR) {
+		inode->i_mode |= S_IFDIR;
+		inode->i_op = &bfs_dir_inops;
+		inode->i_fop = &bfs_dir_operations;
+	} else if (le32_to_cpu(di->i_vtype) == BFS_VREG) {
+		inode->i_mode |= S_IFREG;
+		inode->i_op = &bfs_file_inops;
+		inode->i_fop = &bfs_file_operations;
+		inode->i_mapping->a_ops = &bfs_aops;
+	} else {
+		brelse(bh);
+		printf("Unknown vtype=%u %s:%08lx\n",
+		       le32_to_cpu(di->i_vtype), inode->i_sb->s_id, ino);
+		goto error;
+	}
+
+	BFS_I(inode)->i_sblock =  le32_to_cpu(di->i_sblock);
+	BFS_I(inode)->i_eblock =  le32_to_cpu(di->i_eblock);
+	BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino);
+	i_uid_write(inode, le32_to_cpu(di->i_uid));
+	i_gid_write(inode,  le32_to_cpu(di->i_gid));
+	set_nlink(inode, le32_to_cpu(di->i_nlink));
+	inode->i_size = BFS_FILESIZE(di);
+	inode->i_blocks = BFS_FILEBLOCKS(di);
+	inode_set_atime(inode, le32_to_cpu(di->i_atime), 0);
+	inode_set_mtime(inode, le32_to_cpu(di->i_mtime), 0);
+	inode_set_ctime(inode, le32_to_cpu(di->i_ctime), 0);
+
+	brelse(bh);
+	unlock_new_inode(inode);
+	return inode;
+
+error:
+	iget_failed(inode);
+	return ERR_PTR(-EIO);
+}
+
+static struct bfs_inode *find_inode(struct super_block *sb, u16 ino, struct buffer_head **p)
+{
+	if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(sb)->si_lasti)) {
+		printf("Bad inode number %s:%08x\n", sb->s_id, ino);
+		return ERR_PTR(-EIO);
+	}
+
+	ino -= BFS_ROOT_INO;
+
+	*p = sb_bread(sb, 1 + ino / BFS_INODES_PER_BLOCK);
+	if (!*p) {
+		printf("Unable to read inode %s:%08x\n", sb->s_id, ino);
+		return ERR_PTR(-EIO);
+	}
+
+	return (struct bfs_inode *)(*p)->b_data +  ino % BFS_INODES_PER_BLOCK;
+}
+
+static int bfs_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+	struct bfs_sb_info *info = BFS_SB(inode->i_sb);
+	unsigned int ino = (u16)inode->i_ino;
+	unsigned long i_sblock;
+	struct bfs_inode *di;
+	struct buffer_head *bh;
+
+	dprintf("ino=%08x\n", ino);
+
+	di = find_inode(inode->i_sb, ino, &bh);
+	if (IS_ERR(di))
+		return PTR_ERR(di);
+
+	mutex_lock(&info->bfs_lock);
+
+	if (ino == BFS_ROOT_INO)
+		di->i_vtype = cpu_to_le32(BFS_VDIR);
+	else
+		di->i_vtype = cpu_to_le32(BFS_VREG);
+
+	di->i_ino = cpu_to_le16(ino);
+	di->i_mode = cpu_to_le32(inode->i_mode);
+	di->i_uid = cpu_to_le32(i_uid_read(inode));
+	di->i_gid = cpu_to_le32(i_gid_read(inode));
+	di->i_nlink = cpu_to_le32(inode->i_nlink);
+	di->i_atime = cpu_to_le32(inode_get_atime_sec(inode));
+	di->i_mtime = cpu_to_le32(inode_get_mtime_sec(inode));
+	di->i_ctime = cpu_to_le32(inode_get_ctime_sec(inode));
+	i_sblock = BFS_I(inode)->i_sblock;
+	di->i_sblock = cpu_to_le32(i_sblock);
+	di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock);
+	di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1);
+
+	mark_buffer_dirty(bh);
+	brelse(bh);
+	mutex_unlock(&info->bfs_lock);
+	set_inode_metadata_writeback(inode);
+	return 0;
+}
+
+static int bfs_sync_inode_metadata(struct inode *inode,
+				   struct writeback_control *wbc)
+{
+	int err = 0;
+	struct bfs_inode *di;
+	struct buffer_head *bh;
+
+	di = find_inode(inode->i_sb, (u16)inode->i_ino, &bh);
+	if (IS_ERR(di))
+		return PTR_ERR(di);
+
+	sync_dirty_buffer(bh);
+	if (buffer_write_io_error(bh)) {
+		err = -EIO;
+		goto out;
+	}
+	err = mmb_sync(&BFS_I(inode)->i_metadata_bhs);
+out:
+	brelse(bh);
+	return err;
+}
+
+static void bfs_evict_inode(struct inode *inode)
+{
+	unsigned long ino = inode->i_ino;
+	struct bfs_inode *di;
+	struct buffer_head *bh;
+	struct super_block *s = inode->i_sb;
+	struct bfs_sb_info *info = BFS_SB(s);
+	struct bfs_inode_info *bi = BFS_I(inode);
+
+	dprintf("ino=%08lx\n", ino);
+
+	truncate_inode_pages_final(&inode->i_data);
+	if (inode->i_nlink)
+		mmb_sync(&BFS_I(inode)->i_metadata_bhs);
+	mmb_invalidate(&BFS_I(inode)->i_metadata_bhs);
+	clear_inode(inode);
+
+	if (inode->i_nlink)
+		return;
+
+	di = find_inode(s, inode->i_ino, &bh);
+	if (IS_ERR(di))
+		return;
+
+	mutex_lock(&info->bfs_lock);
+	/* clear on-disk inode */
+	memset(di, 0, sizeof(struct bfs_inode));
+	mark_buffer_dirty(bh);
+	brelse(bh);
+
+	if (bi->i_dsk_ino) {
+		if (bi->i_sblock)
+			info->si_freeb += bi->i_eblock + 1 - bi->i_sblock;
+		info->si_freei++;
+		clear_bit(ino, info->si_imap);
+		bfs_dump_imap("evict_inode", s);
+	}
+
+	/*
+	 * If this was the last file, make the previous block
+	 * "last block of the last file" even if there is no
+	 * real file there, saves us 1 gap.
+	 */
+	if (info->si_lf_eblk == bi->i_eblock)
+		info->si_lf_eblk = bi->i_sblock - 1;
+	mutex_unlock(&info->bfs_lock);
+}
+
+static void bfs_put_super(struct super_block *s)
+{
+	struct bfs_sb_info *info = BFS_SB(s);
+
+	if (!info)
+		return;
+
+	mutex_destroy(&info->bfs_lock);
+	kfree(info);
+	s->s_fs_info = NULL;
+}
+
+static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct super_block *s = dentry->d_sb;
+	struct bfs_sb_info *info = BFS_SB(s);
+	u64 id = huge_encode_dev(s->s_bdev->bd_dev);
+	buf->f_type = BFS_MAGIC;
+	buf->f_bsize = s->s_blocksize;
+	buf->f_blocks = info->si_blocks;
+	buf->f_bfree = buf->f_bavail = info->si_freeb;
+	buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO;
+	buf->f_ffree = info->si_freei;
+	buf->f_fsid = u64_to_fsid(id);
+	buf->f_namelen = BFS_NAMELEN;
+	return 0;
+}
+
+static struct kmem_cache *bfs_inode_cachep;
+
+static struct inode *bfs_alloc_inode(struct super_block *sb)
+{
+	struct bfs_inode_info *bi;
+	bi = alloc_inode_sb(sb, bfs_inode_cachep, GFP_KERNEL);
+	if (!bi)
+		return NULL;
+	mmb_init(&bi->i_metadata_bhs, &bi->vfs_inode.i_data);
+
+	return &bi->vfs_inode;
+}
+
+static void bfs_free_inode(struct inode *inode)
+{
+	kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
+}
+
+static void init_once(void *foo)
+{
+	struct bfs_inode_info *bi = foo;
+
+	inode_init_once(&bi->vfs_inode);
+}
+
+static int __init init_inodecache(void)
+{
+	bfs_inode_cachep = kmem_cache_create("bfs_inode_cache",
+					     sizeof(struct bfs_inode_info),
+					     0, (SLAB_RECLAIM_ACCOUNT|
+						SLAB_ACCOUNT),
+					     init_once);
+	if (bfs_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static void destroy_inodecache(void)
+{
+	/*
+	 * Make sure all delayed rcu free inodes are flushed before we
+	 * destroy cache.
+	 */
+	rcu_barrier();
+	kmem_cache_destroy(bfs_inode_cachep);
+}
+
+static const struct super_operations bfs_sops = {
+	.alloc_inode	= bfs_alloc_inode,
+	.free_inode	= bfs_free_inode,
+	.write_inode	= bfs_write_inode,
+	.sync_inode_metadata = bfs_sync_inode_metadata,
+	.evict_inode	= bfs_evict_inode,
+	.put_super	= bfs_put_super,
+	.statfs		= bfs_statfs,
+};
+
+void bfs_dump_imap(const char *prefix, struct super_block *s)
+{
+#ifdef DEBUG
+	int i;
+	char *tmpbuf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+
+	if (!tmpbuf)
+		return;
+	for (i = BFS_SB(s)->si_lasti; i >= 0; i--) {
+		if (i > PAGE_SIZE - 100) break;
+		if (test_bit(i, BFS_SB(s)->si_imap))
+			strcat(tmpbuf, "1");
+		else
+			strcat(tmpbuf, "0");
+	}
+	printf("%s: lasti=%08lx <%s>\n", prefix, BFS_SB(s)->si_lasti, tmpbuf);
+	kfree(tmpbuf);
+#endif
+}
+
+static int bfs_fill_super(struct super_block *s, struct fs_context *fc)
+{
+	struct buffer_head *bh, *sbh;
+	struct bfs_super_block *bfs_sb;
+	struct inode *inode;
+	unsigned i;
+	struct bfs_sb_info *info;
+	int ret = -EINVAL;
+	unsigned long i_sblock, i_eblock, i_eoff, s_size;
+	int silent = fc->sb_flags & SB_SILENT;
+
+	info = kzalloc_obj(*info);
+	if (!info)
+		return -ENOMEM;
+	mutex_init(&info->bfs_lock);
+	s->s_fs_info = info;
+	s->s_time_min = 0;
+	s->s_time_max = U32_MAX;
+
+	if (!sb_set_blocksize(s, BFS_BSIZE))
+		goto out;
+
+	sbh = sb_bread(s, 0);
+	if (!sbh)
+		goto out;
+	bfs_sb = (struct bfs_super_block *)sbh->b_data;
+	if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) {
+		if (!silent)
+			printf("No BFS filesystem on %s (magic=%08x)\n", s->s_id,  le32_to_cpu(bfs_sb->s_magic));
+		goto out1;
+	}
+	if (BFS_UNCLEAN(bfs_sb, s) && !silent)
+		printf("%s is unclean, continuing\n", s->s_id);
+
+	s->s_magic = BFS_MAGIC;
+
+	if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end) ||
+	    le32_to_cpu(bfs_sb->s_start) < sizeof(struct bfs_super_block) + sizeof(struct bfs_dirent)) {
+		printf("Superblock is corrupted on %s\n", s->s_id);
+		goto out1;
+	}
+
+	info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / sizeof(struct bfs_inode) + BFS_ROOT_INO - 1;
+	if (info->si_lasti == BFS_MAX_LASTI)
+		printf("NOTE: filesystem %s was created with 512 inodes, the real maximum is 511, mounting anyway\n", s->s_id);
+	else if (info->si_lasti > BFS_MAX_LASTI) {
+		printf("Impossible last inode number %lu > %d on %s\n", info->si_lasti, BFS_MAX_LASTI, s->s_id);
+		goto out1;
+	}
+	for (i = 0; i < BFS_ROOT_INO; i++)
+		set_bit(i, info->si_imap);
+
+	s->s_op = &bfs_sops;
+	inode = bfs_iget(s, BFS_ROOT_INO);
+	if (IS_ERR(inode)) {
+		ret = PTR_ERR(inode);
+		goto out1;
+	}
+	s->s_root = d_make_root(inode);
+	if (!s->s_root) {
+		ret = -ENOMEM;
+		goto out1;
+	}
+
+	info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS;
+	info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS;
+	info->si_freei = 0;
+	info->si_lf_eblk = 0;
+
+	/* can we read the last block? */
+	bh = sb_bread(s, info->si_blocks - 1);
+	if (!bh) {
+		printf("Last block not available on %s: %lu\n", s->s_id, info->si_blocks - 1);
+		ret = -EIO;
+		goto out2;
+	}
+	brelse(bh);
+
+	bh = NULL;
+	for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) {
+		struct bfs_inode *di;
+		int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
+		int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
+		unsigned long eblock;
+
+		if (!off) {
+			brelse(bh);
+			bh = sb_bread(s, block);
+		}
+
+		if (!bh)
+			continue;
+
+		di = (struct bfs_inode *)bh->b_data + off;
+
+		/* test if filesystem is not corrupted */
+
+		i_eoff = le32_to_cpu(di->i_eoffset);
+		i_sblock = le32_to_cpu(di->i_sblock);
+		i_eblock = le32_to_cpu(di->i_eblock);
+		s_size = le32_to_cpu(bfs_sb->s_end);
+
+		if (i_sblock > info->si_blocks ||
+			i_eblock > info->si_blocks ||
+			i_sblock > i_eblock ||
+			(i_eoff != le32_to_cpu(-1) && i_eoff > s_size) ||
+			i_sblock * BFS_BSIZE > i_eoff) {
+
+			printf("Inode 0x%08x corrupted on %s\n", i, s->s_id);
+
+			brelse(bh);
+			ret = -EIO;
+			goto out2;
+		}
+
+		if (!di->i_ino) {
+			info->si_freei++;
+			continue;
+		}
+		set_bit(i, info->si_imap);
+		info->si_freeb -= BFS_FILEBLOCKS(di);
+
+		eblock =  le32_to_cpu(di->i_eblock);
+		if (eblock > info->si_lf_eblk)
+			info->si_lf_eblk = eblock;
+	}
+	brelse(bh);
+	brelse(sbh);
+	bfs_dump_imap("fill_super", s);
+	return 0;
+
+out2:
+	dput(s->s_root);
+	s->s_root = NULL;
+out1:
+	brelse(sbh);
+out:
+	mutex_destroy(&info->bfs_lock);
+	kfree(info);
+	s->s_fs_info = NULL;
+	return ret;
+}
+
+static int bfs_get_tree(struct fs_context *fc)
+{
+	return get_tree_bdev(fc, bfs_fill_super);
+}
+
+static const struct fs_context_operations bfs_context_ops = {
+	.get_tree = bfs_get_tree,
+};
+
+static int bfs_init_fs_context(struct fs_context *fc)
+{
+	fc->ops = &bfs_context_ops;
+
+	return 0;
+}
+
+static struct file_system_type bfs_fs_type = {
+	.owner			= THIS_MODULE,
+	.name			= "bfs",
+	.init_fs_context	= bfs_init_fs_context,
+	.kill_sb		= kill_block_super,
+	.fs_flags		= FS_REQUIRES_DEV,
+};
+MODULE_ALIAS_FS("bfs");
+
+static int __init init_bfs_fs(void)
+{
+	int err = init_inodecache();
+	if (err)
+		goto out1;
+	err = register_filesystem(&bfs_fs_type);
+	if (err)
+		goto out;
+	return 0;
+out:
+	destroy_inodecache();
+out1:
+	return err;
+}
+
+static void __exit exit_bfs_fs(void)
+{
+	unregister_filesystem(&bfs_fs_type);
+	destroy_inodecache();
+}
+
+module_init(init_bfs_fs)
+module_exit(exit_bfs_fs)