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, 706 insertions, 0 deletions

diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
new file mode 100644
index 000000000..5dabc5770
--- /dev/null
+++ b/fs/squashfs/super.c
@@ -0,0 +1,706 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * Phillip Lougher <phillip@squashfs.org.uk>
+ *
+ * super.c
+ */
+
+/*
+ * This file implements code to read the superblock, read and initialise
+ * in-memory structures at mount time, and all the VFS glue code to register
+ * the filesystem.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/blkdev.h>
+#include <linux/fs.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+#include <linux/vfs.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/seq_file.h>
+#include <linux/pagemap.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/magic.h>
+#include <linux/xattr.h>
+
+#include "squashfs_fs.h"
+#include "squashfs_fs_sb.h"
+#include "squashfs_fs_i.h"
+#include "squashfs.h"
+#include "decompressor.h"
+#include "xattr.h"
+
+static struct file_system_type squashfs_fs_type;
+static const struct super_operations squashfs_super_ops;
+
+enum Opt_errors {
+	Opt_errors_continue,
+	Opt_errors_panic,
+};
+
+enum squashfs_param {
+	Opt_errors,
+	Opt_threads,
+};
+
+struct squashfs_mount_opts {
+	enum Opt_errors errors;
+	const struct squashfs_decompressor_thread_ops *thread_ops;
+	int thread_num;
+};
+
+static const struct constant_table squashfs_param_errors[] = {
+	{"continue",   Opt_errors_continue },
+	{"panic",      Opt_errors_panic },
+	{}
+};
+
+static const struct fs_parameter_spec squashfs_fs_parameters[] = {
+	fsparam_enum("errors", Opt_errors, squashfs_param_errors),
+	fsparam_string("threads", Opt_threads),
+	{}
+};
+
+
+static int squashfs_parse_param_threads_str(const char *str, struct squashfs_mount_opts *opts)
+{
+#ifdef CONFIG_SQUASHFS_CHOICE_DECOMP_BY_MOUNT
+	if (strcmp(str, "single") == 0) {
+		opts->thread_ops = &squashfs_decompressor_single;
+		return 0;
+	}
+	if (strcmp(str, "multi") == 0) {
+		opts->thread_ops = &squashfs_decompressor_multi;
+		return 0;
+	}
+	if (strcmp(str, "percpu") == 0) {
+		opts->thread_ops = &squashfs_decompressor_percpu;
+		return 0;
+	}
+#endif
+	return -EINVAL;
+}
+
+static int squashfs_parse_param_threads_num(const char *str, struct squashfs_mount_opts *opts)
+{
+#ifdef CONFIG_SQUASHFS_MOUNT_DECOMP_THREADS
+	int ret;
+	unsigned long num;
+
+	ret = kstrtoul(str, 0, &num);
+	if (ret != 0)
+		return -EINVAL;
+	if (num > 1) {
+		opts->thread_ops = &squashfs_decompressor_multi;
+		if (num > opts->thread_ops->max_decompressors())
+			return -EINVAL;
+		opts->thread_num = (int)num;
+		return 0;
+	}
+#ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
+	if (num == 1) {
+		opts->thread_ops = &squashfs_decompressor_single;
+		opts->thread_num = 1;
+		return 0;
+	}
+#endif
+#endif /* !CONFIG_SQUASHFS_MOUNT_DECOMP_THREADS */
+	return -EINVAL;
+}
+
+static int squashfs_parse_param_threads(const char *str, struct squashfs_mount_opts *opts)
+{
+	int ret = squashfs_parse_param_threads_str(str, opts);
+
+	if (ret == 0)
+		return ret;
+	return squashfs_parse_param_threads_num(str, opts);
+}
+
+static int squashfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+	struct squashfs_mount_opts *opts = fc->fs_private;
+	struct fs_parse_result result;
+	int opt;
+
+	opt = fs_parse(fc, squashfs_fs_parameters, param, &result);
+	if (opt < 0)
+		return opt;
+
+	switch (opt) {
+	case Opt_errors:
+		opts->errors = result.uint_32;
+		break;
+	case Opt_threads:
+		if (squashfs_parse_param_threads(param->string, opts) != 0)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct squashfs_decompressor *supported_squashfs_filesystem(
+	struct fs_context *fc,
+	short major, short minor, short id)
+{
+	const struct squashfs_decompressor *decompressor;
+
+	if (major < SQUASHFS_MAJOR) {
+		errorf(fc, "Major/Minor mismatch, older Squashfs %d.%d "
+		       "filesystems are unsupported", major, minor);
+		return NULL;
+	} else if (major > SQUASHFS_MAJOR || minor > SQUASHFS_MINOR) {
+		errorf(fc, "Major/Minor mismatch, trying to mount newer "
+		       "%d.%d filesystem", major, minor);
+		errorf(fc, "Please update your kernel");
+		return NULL;
+	}
+
+	decompressor = squashfs_lookup_decompressor(id);
+	if (!decompressor->supported) {
+		errorf(fc, "Filesystem uses \"%s\" compression. This is not supported",
+		       decompressor->name);
+		return NULL;
+	}
+
+	return decompressor;
+}
+
+
+static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
+{
+	struct squashfs_mount_opts *opts = fc->fs_private;
+	struct squashfs_sb_info *msblk;
+	struct squashfs_super_block *sblk = NULL;
+	struct inode *root;
+	long long root_inode;
+	unsigned short flags;
+	unsigned int fragments;
+	u64 lookup_table_start, xattr_id_table_start, next_table;
+	int err, devblksize = sb_min_blocksize(sb, SQUASHFS_DEVBLK_SIZE);
+
+	TRACE("Entered squashfs_fill_superblock\n");
+
+	if (!devblksize) {
+		errorf(fc, "squashfs: unable to set blocksize\n");
+		return -EINVAL;
+	}
+
+	sb->s_fs_info = kzalloc_obj(*msblk);
+	if (sb->s_fs_info == NULL) {
+		ERROR("Failed to allocate squashfs_sb_info\n");
+		return -ENOMEM;
+	}
+	msblk = sb->s_fs_info;
+	msblk->thread_ops = opts->thread_ops;
+
+	msblk->panic_on_errors = (opts->errors == Opt_errors_panic);
+
+	msblk->devblksize = devblksize;
+	msblk->devblksize_log2 = ffz(~msblk->devblksize);
+
+	mutex_init(&msblk->meta_index_mutex);
+
+	/*
+	 * msblk->bytes_used is checked in squashfs_read_table to ensure reads
+	 * are not beyond filesystem end.  But as we're using
+	 * squashfs_read_table here to read the superblock (including the value
+	 * of bytes_used) we need to set it to an initial sensible dummy value
+	 */
+	msblk->bytes_used = sizeof(*sblk);
+	sblk = squashfs_read_table(sb, SQUASHFS_START, sizeof(*sblk));
+
+	if (IS_ERR(sblk)) {
+		errorf(fc, "unable to read squashfs_super_block");
+		err = PTR_ERR(sblk);
+		sblk = NULL;
+		goto failed_mount;
+	}
+
+	err = -EINVAL;
+
+	/* Check it is a SQUASHFS superblock */
+	sb->s_magic = le32_to_cpu(sblk->s_magic);
+	if (sb->s_magic != SQUASHFS_MAGIC) {
+		if (!(fc->sb_flags & SB_SILENT))
+			errorf(fc, "Can't find a SQUASHFS superblock on %pg",
+			       sb->s_bdev);
+		goto failed_mount;
+	}
+
+	if (opts->thread_num == 0) {
+		msblk->max_thread_num = msblk->thread_ops->max_decompressors();
+	} else {
+		msblk->max_thread_num = opts->thread_num;
+	}
+
+	/* Check the MAJOR & MINOR versions and lookup compression type */
+	msblk->decompressor = supported_squashfs_filesystem(
+			fc,
+			le16_to_cpu(sblk->s_major),
+			le16_to_cpu(sblk->s_minor),
+			le16_to_cpu(sblk->compression));
+	if (msblk->decompressor == NULL)
+		goto failed_mount;
+
+	/* Check the filesystem does not extend beyond the end of the
+	   block device */
+	msblk->bytes_used = le64_to_cpu(sblk->bytes_used);
+	if (msblk->bytes_used < 0 ||
+	    msblk->bytes_used > bdev_nr_bytes(sb->s_bdev))
+		goto failed_mount;
+
+	/* Check block size for sanity */
+	msblk->block_size = le32_to_cpu(sblk->block_size);
+	if (msblk->block_size > SQUASHFS_FILE_MAX_SIZE)
+		goto insanity;
+
+	/*
+	 * Check the system page size is not larger than the filesystem
+	 * block size (by default 128K).  This is currently not supported.
+	 */
+	if (PAGE_SIZE > msblk->block_size) {
+		errorf(fc, "Page size > filesystem block size (%d).  This is "
+		       "currently not supported!", msblk->block_size);
+		goto failed_mount;
+	}
+
+	/* Check block log for sanity */
+	msblk->block_log = le16_to_cpu(sblk->block_log);
+	if (msblk->block_log > SQUASHFS_FILE_MAX_LOG)
+		goto failed_mount;
+
+	/* Check that block_size and block_log match */
+	if (msblk->block_size != (1 << msblk->block_log))
+		goto insanity;
+
+	/* Check the root inode for sanity */
+	root_inode = le64_to_cpu(sblk->root_inode);
+	if (SQUASHFS_INODE_OFFSET(root_inode) > SQUASHFS_METADATA_SIZE)
+		goto insanity;
+
+	msblk->inode_table = le64_to_cpu(sblk->inode_table_start);
+	msblk->directory_table = le64_to_cpu(sblk->directory_table_start);
+	msblk->inodes = le32_to_cpu(sblk->inodes);
+	msblk->fragments = le32_to_cpu(sblk->fragments);
+	msblk->ids = le16_to_cpu(sblk->no_ids);
+	flags = le16_to_cpu(sblk->flags);
+
+	TRACE("Found valid superblock on %pg\n", sb->s_bdev);
+	TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(flags)
+				? "un" : "");
+	TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(flags)
+				? "un" : "");
+	TRACE("Filesystem size %lld bytes\n", msblk->bytes_used);
+	TRACE("Block size %d\n", msblk->block_size);
+	TRACE("Number of inodes %d\n", msblk->inodes);
+	TRACE("Number of fragments %d\n", msblk->fragments);
+	TRACE("Number of ids %d\n", msblk->ids);
+	TRACE("sblk->inode_table_start %llx\n", msblk->inode_table);
+	TRACE("sblk->directory_table_start %llx\n", msblk->directory_table);
+	TRACE("sblk->fragment_table_start %llx\n",
+		(u64) le64_to_cpu(sblk->fragment_table_start));
+	TRACE("sblk->id_table_start %llx\n",
+		(u64) le64_to_cpu(sblk->id_table_start));
+
+	sb->s_maxbytes = MAX_LFS_FILESIZE;
+	sb->s_time_min = 0;
+	sb->s_time_max = U32_MAX;
+	sb->s_flags |= SB_RDONLY;
+	sb->s_op = &squashfs_super_ops;
+
+	msblk->block_cache = squashfs_cache_init("metadata",
+			SQUASHFS_CACHED_BLKS, SQUASHFS_METADATA_SIZE);
+	if (IS_ERR(msblk->block_cache)) {
+		err = PTR_ERR(msblk->block_cache);
+		goto failed_mount;
+	}
+
+	/* Allocate read_page block */
+	msblk->read_page = squashfs_cache_init("data",
+		SQUASHFS_READ_PAGES, msblk->block_size);
+	if (IS_ERR(msblk->read_page)) {
+		errorf(fc, "Failed to allocate read_page block");
+		err = PTR_ERR(msblk->read_page);
+		goto failed_mount;
+	}
+
+	if (msblk->devblksize == PAGE_SIZE) {
+		struct inode *cache = new_inode(sb);
+
+		if (cache == NULL) {
+			err = -ENOMEM;
+			goto failed_mount;
+		}
+
+		set_nlink(cache, 1);
+		cache->i_size = OFFSET_MAX;
+		mapping_set_gfp_mask(cache->i_mapping, GFP_NOFS);
+
+		msblk->cache_mapping = cache->i_mapping;
+	}
+
+	msblk->stream = squashfs_decompressor_setup(sb, flags);
+	if (IS_ERR(msblk->stream)) {
+		err = PTR_ERR(msblk->stream);
+		msblk->stream = NULL;
+		goto insanity;
+	}
+
+	/* Handle xattrs */
+	sb->s_xattr = squashfs_xattr_handlers;
+	xattr_id_table_start = le64_to_cpu(sblk->xattr_id_table_start);
+	if (xattr_id_table_start == SQUASHFS_INVALID_BLK) {
+		next_table = msblk->bytes_used;
+		goto allocate_id_index_table;
+	}
+
+	/* Allocate and read xattr id lookup table */
+	msblk->xattr_id_table = squashfs_read_xattr_id_table(sb,
+		xattr_id_table_start, &msblk->xattr_table, &msblk->xattr_ids);
+	if (IS_ERR(msblk->xattr_id_table)) {
+		errorf(fc, "unable to read xattr id index table");
+		err = PTR_ERR(msblk->xattr_id_table);
+		msblk->xattr_id_table = NULL;
+		if (err != -ENOTSUPP)
+			goto failed_mount;
+	}
+	next_table = msblk->xattr_table;
+
+allocate_id_index_table:
+	/* Allocate and read id index table */
+	msblk->id_table = squashfs_read_id_index_table(sb,
+		le64_to_cpu(sblk->id_table_start), next_table, msblk->ids);
+	if (IS_ERR(msblk->id_table)) {
+		errorf(fc, "unable to read id index table");
+		err = PTR_ERR(msblk->id_table);
+		msblk->id_table = NULL;
+		goto failed_mount;
+	}
+	next_table = le64_to_cpu(msblk->id_table[0]);
+
+	/* Handle inode lookup table */
+	lookup_table_start = le64_to_cpu(sblk->lookup_table_start);
+	if (lookup_table_start == SQUASHFS_INVALID_BLK)
+		goto handle_fragments;
+
+	/* Allocate and read inode lookup table */
+	msblk->inode_lookup_table = squashfs_read_inode_lookup_table(sb,
+		lookup_table_start, next_table, msblk->inodes);
+	if (IS_ERR(msblk->inode_lookup_table)) {
+		errorf(fc, "unable to read inode lookup table");
+		err = PTR_ERR(msblk->inode_lookup_table);
+		msblk->inode_lookup_table = NULL;
+		goto failed_mount;
+	}
+	next_table = le64_to_cpu(msblk->inode_lookup_table[0]);
+
+	sb->s_export_op = &squashfs_export_ops;
+
+handle_fragments:
+	fragments = msblk->fragments;
+	if (fragments == 0)
+		goto check_directory_table;
+
+	msblk->fragment_cache = squashfs_cache_init("fragment",
+		min(SQUASHFS_CACHED_FRAGMENTS, fragments), msblk->block_size);
+	if (IS_ERR(msblk->fragment_cache)) {
+		err = PTR_ERR(msblk->fragment_cache);
+		goto failed_mount;
+	}
+
+	/* Allocate and read fragment index table */
+	msblk->fragment_index = squashfs_read_fragment_index_table(sb,
+		le64_to_cpu(sblk->fragment_table_start), next_table, fragments);
+	if (IS_ERR(msblk->fragment_index)) {
+		errorf(fc, "unable to read fragment index table");
+		err = PTR_ERR(msblk->fragment_index);
+		msblk->fragment_index = NULL;
+		goto failed_mount;
+	}
+	next_table = le64_to_cpu(msblk->fragment_index[0]);
+
+check_directory_table:
+	/* Sanity check directory_table */
+	if (msblk->directory_table > next_table) {
+		err = -EINVAL;
+		goto insanity;
+	}
+
+	/* Sanity check inode_table */
+	if (msblk->inode_table >= msblk->directory_table) {
+		err = -EINVAL;
+		goto insanity;
+	}
+
+	/* allocate root */
+	root = new_inode(sb);
+	if (!root) {
+		err = -ENOMEM;
+		goto failed_mount;
+	}
+
+	err = squashfs_read_inode(root, root_inode);
+	if (err) {
+		make_bad_inode(root);
+		iput(root);
+		goto failed_mount;
+	}
+	insert_inode_hash(root);
+
+	sb->s_root = d_make_root(root);
+	if (sb->s_root == NULL) {
+		ERROR("Root inode create failed\n");
+		err = -ENOMEM;
+		goto failed_mount;
+	}
+
+	TRACE("Leaving squashfs_fill_super\n");
+	kfree(sblk);
+	return 0;
+
+insanity:
+	errorf(fc, "squashfs image failed sanity check");
+failed_mount:
+	squashfs_cache_delete(msblk->block_cache);
+	squashfs_cache_delete(msblk->fragment_cache);
+	squashfs_cache_delete(msblk->read_page);
+	if (msblk->cache_mapping)
+		iput(msblk->cache_mapping->host);
+	msblk->thread_ops->destroy(msblk);
+	kfree(msblk->inode_lookup_table);
+	kfree(msblk->fragment_index);
+	kfree(msblk->id_table);
+	kfree(msblk->xattr_id_table);
+	kfree(sb->s_fs_info);
+	sb->s_fs_info = NULL;
+	kfree(sblk);
+	return err;
+}
+
+static int squashfs_get_tree(struct fs_context *fc)
+{
+	return get_tree_bdev(fc, squashfs_fill_super);
+}
+
+static int squashfs_reconfigure(struct fs_context *fc)
+{
+	struct super_block *sb = fc->root->d_sb;
+	struct squashfs_sb_info *msblk = sb->s_fs_info;
+	struct squashfs_mount_opts *opts = fc->fs_private;
+
+	sync_filesystem(fc->root->d_sb);
+	fc->sb_flags |= SB_RDONLY;
+
+	msblk->panic_on_errors = (opts->errors == Opt_errors_panic);
+
+	return 0;
+}
+
+static void squashfs_free_fs_context(struct fs_context *fc)
+{
+	kfree(fc->fs_private);
+}
+
+static const struct fs_context_operations squashfs_context_ops = {
+	.get_tree	= squashfs_get_tree,
+	.free		= squashfs_free_fs_context,
+	.parse_param	= squashfs_parse_param,
+	.reconfigure	= squashfs_reconfigure,
+};
+
+static int squashfs_show_options(struct seq_file *s, struct dentry *root)
+{
+	struct super_block *sb = root->d_sb;
+	struct squashfs_sb_info *msblk = sb->s_fs_info;
+
+	if (msblk->panic_on_errors)
+		seq_puts(s, ",errors=panic");
+	else
+		seq_puts(s, ",errors=continue");
+
+#ifdef CONFIG_SQUASHFS_CHOICE_DECOMP_BY_MOUNT
+	if (msblk->thread_ops == &squashfs_decompressor_single) {
+		seq_puts(s, ",threads=single");
+		return 0;
+	}
+	if (msblk->thread_ops == &squashfs_decompressor_percpu) {
+		seq_puts(s, ",threads=percpu");
+		return 0;
+	}
+#endif
+#ifdef CONFIG_SQUASHFS_MOUNT_DECOMP_THREADS
+	seq_printf(s, ",threads=%d", msblk->max_thread_num);
+#endif
+	return 0;
+}
+
+static int squashfs_init_fs_context(struct fs_context *fc)
+{
+	struct squashfs_mount_opts *opts;
+
+	opts = kzalloc_obj(*opts);
+	if (!opts)
+		return -ENOMEM;
+
+#ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
+	opts->thread_ops = &squashfs_decompressor_single;
+#elif defined(CONFIG_SQUASHFS_DECOMP_MULTI)
+	opts->thread_ops = &squashfs_decompressor_multi;
+#elif defined(CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU)
+	opts->thread_ops = &squashfs_decompressor_percpu;
+#else
+#error "fail: unknown squashfs decompression thread mode?"
+#endif
+	opts->thread_num = 0;
+	fc->fs_private = opts;
+	fc->ops = &squashfs_context_ops;
+	return 0;
+}
+
+static int squashfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct squashfs_sb_info *msblk = dentry->d_sb->s_fs_info;
+	u64 id = huge_encode_dev(dentry->d_sb->s_bdev->bd_dev);
+
+	TRACE("Entered squashfs_statfs\n");
+
+	buf->f_type = SQUASHFS_MAGIC;
+	buf->f_bsize = msblk->block_size;
+	buf->f_blocks = ((msblk->bytes_used - 1) >> msblk->block_log) + 1;
+	buf->f_bfree = buf->f_bavail = 0;
+	buf->f_files = msblk->inodes;
+	buf->f_ffree = 0;
+	buf->f_namelen = SQUASHFS_NAME_LEN;
+	buf->f_fsid = u64_to_fsid(id);
+
+	return 0;
+}
+
+
+static void squashfs_put_super(struct super_block *sb)
+{
+	if (sb->s_fs_info) {
+		struct squashfs_sb_info *sbi = sb->s_fs_info;
+		squashfs_cache_delete(sbi->block_cache);
+		squashfs_cache_delete(sbi->fragment_cache);
+		squashfs_cache_delete(sbi->read_page);
+		if (sbi->cache_mapping)
+			iput(sbi->cache_mapping->host);
+		sbi->thread_ops->destroy(sbi);
+		kfree(sbi->id_table);
+		kfree(sbi->fragment_index);
+		kfree(sbi->meta_index);
+		kfree(sbi->inode_lookup_table);
+		kfree(sbi->xattr_id_table);
+		kfree(sb->s_fs_info);
+		sb->s_fs_info = NULL;
+	}
+}
+
+static struct kmem_cache *squashfs_inode_cachep;
+
+
+static void init_once(void *foo)
+{
+	struct squashfs_inode_info *ei = foo;
+
+	inode_init_once(&ei->vfs_inode);
+}
+
+
+static int __init init_inodecache(void)
+{
+	squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache",
+		sizeof(struct squashfs_inode_info), 0,
+		SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT,
+		init_once);
+
+	return squashfs_inode_cachep ? 0 : -ENOMEM;
+}
+
+
+static void destroy_inodecache(void)
+{
+	/*
+	 * Make sure all delayed rcu free inodes are flushed before we
+	 * destroy cache.
+	 */
+	rcu_barrier();
+	kmem_cache_destroy(squashfs_inode_cachep);
+}
+
+
+static int __init init_squashfs_fs(void)
+{
+	int err = init_inodecache();
+
+	if (err)
+		return err;
+
+	err = register_filesystem(&squashfs_fs_type);
+	if (err) {
+		destroy_inodecache();
+		return err;
+	}
+
+	pr_info("version 4.0 (2009/01/31) Phillip Lougher\n");
+
+	return 0;
+}
+
+
+static void __exit exit_squashfs_fs(void)
+{
+	unregister_filesystem(&squashfs_fs_type);
+	destroy_inodecache();
+}
+
+
+static struct inode *squashfs_alloc_inode(struct super_block *sb)
+{
+	struct squashfs_inode_info *ei =
+		alloc_inode_sb(sb, squashfs_inode_cachep, GFP_KERNEL);
+
+	return ei ? &ei->vfs_inode : NULL;
+}
+
+
+static void squashfs_free_inode(struct inode *inode)
+{
+	kmem_cache_free(squashfs_inode_cachep, squashfs_i(inode));
+}
+
+static struct file_system_type squashfs_fs_type = {
+	.owner = THIS_MODULE,
+	.name = "squashfs",
+	.init_fs_context = squashfs_init_fs_context,
+	.parameters = squashfs_fs_parameters,
+	.kill_sb = kill_block_super,
+	.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
+};
+MODULE_ALIAS_FS("squashfs");
+
+static const struct super_operations squashfs_super_ops = {
+	.alloc_inode = squashfs_alloc_inode,
+	.free_inode = squashfs_free_inode,
+	.statfs = squashfs_statfs,
+	.put_super = squashfs_put_super,
+	.show_options = squashfs_show_options,
+};
+
+module_init(init_squashfs_fs);
+module_exit(exit_squashfs_fs);
+MODULE_DESCRIPTION("squashfs 4.0, a compressed read-only filesystem");
+MODULE_AUTHOR("Phillip Lougher <phillip@squashfs.org.uk>");
+MODULE_LICENSE("GPL");