Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 851 insertions, 0 deletions

diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
new file mode 100644
index 000000000..6728d1488
--- /dev/null
+++ b/fs/f2fs/xattr.c
@@ -0,0 +1,851 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/f2fs/xattr.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *             http://www.samsung.com/
+ *
+ * Portions of this code from linux/fs/ext2/xattr.c
+ *
+ * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de>
+ *
+ * Fix by Harrison Xing <harrison@mountainviewdata.com>.
+ * Extended attributes for symlinks and special files added per
+ *  suggestion of Luka Renko <luka.renko@hermes.si>.
+ * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>,
+ *  Red Hat Inc.
+ */
+#include <linux/rwsem.h>
+#include <linux/f2fs_fs.h>
+#include <linux/security.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/fserror.h>
+#include "f2fs.h"
+#include "xattr.h"
+#include "segment.h"
+
+static struct kmem_cache *inline_xattr_slab;
+static void *xattr_alloc(struct f2fs_sb_info *sbi, int size, bool *is_inline)
+{
+	if (likely(size == DEFAULT_XATTR_SLAB_SIZE)) {
+		*is_inline = true;
+		return f2fs_kmem_cache_alloc(inline_xattr_slab,
+					GFP_F2FS_ZERO, false, sbi);
+	}
+	*is_inline = false;
+	return f2fs_kzalloc(sbi, size, GFP_NOFS);
+}
+
+static void xattr_free(struct f2fs_sb_info *sbi, void *xattr_addr,
+							bool is_inline)
+{
+	if (is_inline)
+		kmem_cache_free(inline_xattr_slab, xattr_addr);
+	else
+		kfree(xattr_addr);
+}
+
+static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
+		struct dentry *unused, struct inode *inode,
+		const char *name, void *buffer, size_t size)
+{
+	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+
+	switch (handler->flags) {
+	case F2FS_XATTR_INDEX_USER:
+		if (!test_opt(sbi, XATTR_USER))
+			return -EOPNOTSUPP;
+		break;
+	case F2FS_XATTR_INDEX_TRUSTED:
+	case F2FS_XATTR_INDEX_SECURITY:
+		break;
+	default:
+		return -EINVAL;
+	}
+	return f2fs_getxattr(inode, handler->flags, name,
+			     buffer, size, NULL);
+}
+
+static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
+		struct mnt_idmap *idmap,
+		struct dentry *unused, struct inode *inode,
+		const char *name, const void *value,
+		size_t size, int flags)
+{
+	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+
+	switch (handler->flags) {
+	case F2FS_XATTR_INDEX_USER:
+		if (!test_opt(sbi, XATTR_USER))
+			return -EOPNOTSUPP;
+		break;
+	case F2FS_XATTR_INDEX_TRUSTED:
+	case F2FS_XATTR_INDEX_SECURITY:
+		break;
+	default:
+		return -EINVAL;
+	}
+	return f2fs_setxattr(inode, handler->flags, name,
+					value, size, NULL, flags);
+}
+
+static bool f2fs_xattr_user_list(struct dentry *dentry)
+{
+	struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+
+	return test_opt(sbi, XATTR_USER);
+}
+
+static bool f2fs_xattr_trusted_list(struct dentry *dentry)
+{
+	return capable(CAP_SYS_ADMIN);
+}
+
+static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
+		struct dentry *unused, struct inode *inode,
+		const char *name, void *buffer, size_t size)
+{
+	if (buffer)
+		*((char *)buffer) = F2FS_I(inode)->i_advise;
+	return sizeof(char);
+}
+
+static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
+		struct mnt_idmap *idmap,
+		struct dentry *unused, struct inode *inode,
+		const char *name, const void *value,
+		size_t size, int flags)
+{
+	unsigned char old_advise = F2FS_I(inode)->i_advise;
+	unsigned char new_advise;
+
+	if (!inode_owner_or_capable(idmap, inode))
+		return -EPERM;
+	if (value == NULL)
+		return -EINVAL;
+
+	new_advise = *(char *)value;
+	if (new_advise & ~FADVISE_MODIFIABLE_BITS)
+		return -EINVAL;
+
+	new_advise = new_advise & FADVISE_MODIFIABLE_BITS;
+	new_advise |= old_advise & ~FADVISE_MODIFIABLE_BITS;
+
+	F2FS_I(inode)->i_advise = new_advise;
+	f2fs_mark_inode_dirty_sync(inode, true);
+	return 0;
+}
+
+#ifdef CONFIG_F2FS_FS_SECURITY
+static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
+		void *folio)
+{
+	const struct xattr *xattr;
+	int err = 0;
+
+	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+		err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY,
+				xattr->name, xattr->value,
+				xattr->value_len, folio, 0);
+		if (err < 0)
+			break;
+	}
+	return err;
+}
+
+int f2fs_init_security(struct inode *inode, struct inode *dir,
+				const struct qstr *qstr, struct folio *ifolio)
+{
+	return security_inode_init_security(inode, dir, qstr,
+				f2fs_initxattrs, ifolio);
+}
+#endif
+
+const struct xattr_handler f2fs_xattr_user_handler = {
+	.prefix	= XATTR_USER_PREFIX,
+	.flags	= F2FS_XATTR_INDEX_USER,
+	.list	= f2fs_xattr_user_list,
+	.get	= f2fs_xattr_generic_get,
+	.set	= f2fs_xattr_generic_set,
+};
+
+const struct xattr_handler f2fs_xattr_trusted_handler = {
+	.prefix	= XATTR_TRUSTED_PREFIX,
+	.flags	= F2FS_XATTR_INDEX_TRUSTED,
+	.list	= f2fs_xattr_trusted_list,
+	.get	= f2fs_xattr_generic_get,
+	.set	= f2fs_xattr_generic_set,
+};
+
+const struct xattr_handler f2fs_xattr_advise_handler = {
+	.name	= F2FS_SYSTEM_ADVISE_NAME,
+	.flags	= F2FS_XATTR_INDEX_ADVISE,
+	.get	= f2fs_xattr_advise_get,
+	.set	= f2fs_xattr_advise_set,
+};
+
+const struct xattr_handler f2fs_xattr_security_handler = {
+	.prefix	= XATTR_SECURITY_PREFIX,
+	.flags	= F2FS_XATTR_INDEX_SECURITY,
+	.get	= f2fs_xattr_generic_get,
+	.set	= f2fs_xattr_generic_set,
+};
+
+static const struct xattr_handler * const f2fs_xattr_handler_map[] = {
+	[F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+	[F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+	[F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
+#endif
+	[F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
+#ifdef CONFIG_F2FS_FS_SECURITY
+	[F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler,
+#endif
+	[F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
+};
+
+const struct xattr_handler * const f2fs_xattr_handlers[] = {
+	&f2fs_xattr_user_handler,
+	&f2fs_xattr_trusted_handler,
+#ifdef CONFIG_F2FS_FS_SECURITY
+	&f2fs_xattr_security_handler,
+#endif
+	&f2fs_xattr_advise_handler,
+	NULL,
+};
+
+static inline const char *f2fs_xattr_prefix(int index,
+					    struct dentry *dentry)
+{
+	const struct xattr_handler *handler = NULL;
+
+	if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
+		handler = f2fs_xattr_handler_map[index];
+
+	if (!xattr_handler_can_list(handler, dentry))
+		return NULL;
+
+	return xattr_prefix(handler);
+}
+
+static struct f2fs_xattr_entry *__find_xattr(void *base_addr,
+				void *last_base_addr, void **last_addr,
+				int index, size_t len, const char *name)
+{
+	struct f2fs_xattr_entry *entry;
+
+	list_for_each_xattr(entry, base_addr) {
+		if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
+			(void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
+			if (last_addr)
+				*last_addr = entry;
+			return NULL;
+		}
+
+		if (entry->e_name_index != index)
+			continue;
+		if (entry->e_name_len != len)
+			continue;
+		if (!memcmp(entry->e_name, name, len))
+			break;
+	}
+	return entry;
+}
+
+static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
+				void *base_addr, void **last_addr, int index,
+				size_t len, const char *name)
+{
+	struct f2fs_xattr_entry *entry;
+	unsigned int inline_size = inline_xattr_size(inode);
+	void *max_addr = base_addr + inline_size;
+
+	entry = __find_xattr(base_addr, max_addr, last_addr, index, len, name);
+	if (!entry)
+		return NULL;
+
+	/* inline xattr header or entry across max inline xattr size */
+	if (IS_XATTR_LAST_ENTRY(entry) &&
+		(void *)entry + sizeof(__u32) > max_addr) {
+		*last_addr = entry;
+		return NULL;
+	}
+	return entry;
+}
+
+static int read_inline_xattr(struct inode *inode, struct folio *ifolio,
+							void *txattr_addr)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	unsigned int inline_size = inline_xattr_size(inode);
+	struct folio *folio = NULL;
+	void *inline_addr;
+
+	if (ifolio) {
+		inline_addr = inline_xattr_addr(inode, ifolio);
+	} else {
+		folio = f2fs_get_inode_folio(sbi, inode->i_ino);
+		if (IS_ERR(folio))
+			return PTR_ERR(folio);
+
+		inline_addr = inline_xattr_addr(inode, folio);
+	}
+	memcpy(txattr_addr, inline_addr, inline_size);
+	f2fs_folio_put(folio, true);
+
+	return 0;
+}
+
+static int read_xattr_block(struct inode *inode, void *txattr_addr)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
+	unsigned int inline_size = inline_xattr_size(inode);
+	struct folio *xfolio;
+	void *xattr_addr;
+
+	/* The inode already has an extended attribute block. */
+	xfolio = f2fs_get_xnode_folio(sbi, xnid);
+	if (IS_ERR(xfolio))
+		return PTR_ERR(xfolio);
+
+	xattr_addr = folio_address(xfolio);
+	memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE);
+	f2fs_folio_put(xfolio, true);
+
+	return 0;
+}
+
+static int lookup_all_xattrs(struct inode *inode, struct folio *ifolio,
+				unsigned int index, unsigned int len,
+				const char *name, struct f2fs_xattr_entry **xe,
+				void **base_addr, int *base_size,
+				bool *is_inline)
+{
+	void *cur_addr, *txattr_addr, *last_txattr_addr;
+	void *last_addr = NULL;
+	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
+	unsigned int inline_size = inline_xattr_size(inode);
+	int err;
+
+	if (!xnid && !inline_size)
+		return -ENODATA;
+
+	*base_size = XATTR_SIZE(inode) + XATTR_PADDING_SIZE;
+	txattr_addr = xattr_alloc(F2FS_I_SB(inode), *base_size, is_inline);
+	if (!txattr_addr)
+		return -ENOMEM;
+
+	last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(inode);
+
+	/* read from inline xattr */
+	if (inline_size) {
+		err = read_inline_xattr(inode, ifolio, txattr_addr);
+		if (err)
+			goto out;
+
+		*xe = __find_inline_xattr(inode, txattr_addr, &last_addr,
+						index, len, name);
+		if (*xe) {
+			*base_size = inline_size;
+			goto check;
+		}
+	}
+
+	/* read from xattr node block */
+	if (xnid) {
+		err = read_xattr_block(inode, txattr_addr);
+		if (err)
+			goto out;
+	}
+
+	if (last_addr)
+		cur_addr = XATTR_HDR(last_addr) - 1;
+	else
+		cur_addr = txattr_addr;
+
+	*xe = __find_xattr(cur_addr, last_txattr_addr, NULL, index, len, name);
+	if (!*xe) {
+		f2fs_err(F2FS_I_SB(inode), "lookup inode (%llu) has corrupted xattr",
+								inode->i_ino);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+		err = -ENODATA;
+		f2fs_handle_error(F2FS_I_SB(inode),
+					ERROR_CORRUPTED_XATTR);
+		fserror_report_file_metadata(inode, err, GFP_NOFS);
+		goto out;
+	}
+check:
+	if (IS_XATTR_LAST_ENTRY(*xe)) {
+		err = -ENODATA;
+		goto out;
+	}
+
+	*base_addr = txattr_addr;
+	return 0;
+out:
+	xattr_free(F2FS_I_SB(inode), txattr_addr, *is_inline);
+	return err;
+}
+
+static int read_all_xattrs(struct inode *inode, struct folio *ifolio,
+							void **base_addr)
+{
+	struct f2fs_xattr_header *header;
+	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
+	unsigned int size = VALID_XATTR_BLOCK_SIZE;
+	unsigned int inline_size = inline_xattr_size(inode);
+	void *txattr_addr;
+	int err;
+
+	txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode),
+			inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS);
+	if (!txattr_addr)
+		return -ENOMEM;
+
+	/* read from inline xattr */
+	if (inline_size) {
+		err = read_inline_xattr(inode, ifolio, txattr_addr);
+		if (err)
+			goto fail;
+	}
+
+	/* read from xattr node block */
+	if (xnid) {
+		err = read_xattr_block(inode, txattr_addr);
+		if (err)
+			goto fail;
+	}
+
+	header = XATTR_HDR(txattr_addr);
+
+	/* never been allocated xattrs */
+	if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
+		header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
+		header->h_refcount = cpu_to_le32(1);
+	}
+	*base_addr = txattr_addr;
+	return 0;
+fail:
+	kfree(txattr_addr);
+	return err;
+}
+
+static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
+				void *txattr_addr, struct folio *ifolio)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	size_t inline_size = inline_xattr_size(inode);
+	struct folio *in_folio = NULL;
+	void *xattr_addr;
+	void *inline_addr = NULL;
+	struct folio *xfolio;
+	nid_t new_nid = 0;
+	int err = 0;
+
+	if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
+		if (!f2fs_alloc_nid(sbi, &new_nid))
+			return -ENOSPC;
+
+	/* write to inline xattr */
+	if (inline_size) {
+		if (ifolio) {
+			inline_addr = inline_xattr_addr(inode, ifolio);
+		} else {
+			in_folio = f2fs_get_inode_folio(sbi, inode->i_ino);
+			if (IS_ERR(in_folio)) {
+				f2fs_alloc_nid_failed(sbi, new_nid);
+				return PTR_ERR(in_folio);
+			}
+			inline_addr = inline_xattr_addr(inode, in_folio);
+		}
+
+		f2fs_folio_wait_writeback(ifolio ? ifolio : in_folio,
+							NODE, true, true);
+		/* no need to use xattr node block */
+		if (hsize <= inline_size) {
+			err = f2fs_truncate_xattr_node(inode);
+			f2fs_alloc_nid_failed(sbi, new_nid);
+			if (err) {
+				f2fs_folio_put(in_folio, true);
+				return err;
+			}
+			memcpy(inline_addr, txattr_addr, inline_size);
+			folio_mark_dirty(ifolio ? ifolio : in_folio);
+			goto in_page_out;
+		}
+	}
+
+	/* write to xattr node block */
+	if (F2FS_I(inode)->i_xattr_nid) {
+		xfolio = f2fs_get_xnode_folio(sbi, F2FS_I(inode)->i_xattr_nid);
+		if (IS_ERR(xfolio)) {
+			err = PTR_ERR(xfolio);
+			f2fs_alloc_nid_failed(sbi, new_nid);
+			goto in_page_out;
+		}
+		f2fs_bug_on(sbi, new_nid);
+		f2fs_folio_wait_writeback(xfolio, NODE, true, true);
+	} else {
+		struct dnode_of_data dn;
+
+		set_new_dnode(&dn, inode, NULL, NULL, new_nid);
+		xfolio = f2fs_new_node_folio(&dn, XATTR_NODE_OFFSET);
+		if (IS_ERR(xfolio)) {
+			err = PTR_ERR(xfolio);
+			f2fs_alloc_nid_failed(sbi, new_nid);
+			goto in_page_out;
+		}
+		f2fs_alloc_nid_done(sbi, new_nid);
+	}
+	xattr_addr = folio_address(xfolio);
+
+	if (inline_size)
+		memcpy(inline_addr, txattr_addr, inline_size);
+	memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
+
+	if (inline_size)
+		folio_mark_dirty(ifolio ? ifolio : in_folio);
+	folio_mark_dirty(xfolio);
+
+	f2fs_folio_put(xfolio, true);
+in_page_out:
+	f2fs_folio_put(in_folio, true);
+	return err;
+}
+
+int f2fs_getxattr(struct inode *inode, int index, const char *name,
+		void *buffer, size_t buffer_size, struct folio *ifolio)
+{
+	struct f2fs_xattr_entry *entry = NULL;
+	int error;
+	unsigned int size, len;
+	void *base_addr = NULL;
+	int base_size;
+	bool is_inline;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	len = strlen(name);
+	if (len > F2FS_NAME_LEN)
+		return -ERANGE;
+
+	if (!ifolio)
+		f2fs_down_read(&F2FS_I(inode)->i_xattr_sem);
+	error = lookup_all_xattrs(inode, ifolio, index, len, name,
+				&entry, &base_addr, &base_size, &is_inline);
+	if (!ifolio)
+		f2fs_up_read(&F2FS_I(inode)->i_xattr_sem);
+	if (error)
+		return error;
+
+	size = le16_to_cpu(entry->e_value_size);
+
+	if (buffer && size > buffer_size) {
+		error = -ERANGE;
+		goto out;
+	}
+
+	if (buffer) {
+		char *pval = entry->e_name + entry->e_name_len;
+
+		if (base_size - (pval - (char *)base_addr) < size) {
+			error = -ERANGE;
+			goto out;
+		}
+		memcpy(buffer, pval, size);
+	}
+	error = size;
+out:
+	xattr_free(F2FS_I_SB(inode), base_addr, is_inline);
+	return error;
+}
+
+ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
+{
+	struct inode *inode = d_inode(dentry);
+	struct f2fs_xattr_entry *entry;
+	void *base_addr, *last_base_addr;
+	int error;
+	size_t rest = buffer_size;
+
+	f2fs_down_read(&F2FS_I(inode)->i_xattr_sem);
+	error = read_all_xattrs(inode, NULL, &base_addr);
+	f2fs_up_read(&F2FS_I(inode)->i_xattr_sem);
+	if (error)
+		return error;
+
+	last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
+
+	list_for_each_xattr(entry, base_addr) {
+		const char *prefix;
+		size_t prefix_len;
+		size_t size;
+
+		if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
+			(void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
+			f2fs_err(F2FS_I_SB(inode), "list inode (%llu) has corrupted xattr",
+						inode->i_ino);
+			set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+			f2fs_handle_error(F2FS_I_SB(inode),
+						ERROR_CORRUPTED_XATTR);
+			fserror_report_file_metadata(inode,
+						-EFSCORRUPTED, GFP_NOFS);
+			error = -EFSCORRUPTED;
+			goto cleanup;
+		}
+
+		prefix = f2fs_xattr_prefix(entry->e_name_index, dentry);
+		if (!prefix)
+			continue;
+
+		prefix_len = strlen(prefix);
+		size = prefix_len + entry->e_name_len + 1;
+		if (buffer) {
+			if (size > rest) {
+				error = -ERANGE;
+				goto cleanup;
+			}
+			memcpy(buffer, prefix, prefix_len);
+			buffer += prefix_len;
+			memcpy(buffer, entry->e_name, entry->e_name_len);
+			buffer += entry->e_name_len;
+			*buffer++ = 0;
+		}
+		rest -= size;
+	}
+	error = buffer_size - rest;
+cleanup:
+	kfree(base_addr);
+	return error;
+}
+
+static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry,
+					const void *value, size_t size)
+{
+	void *pval = entry->e_name + entry->e_name_len;
+
+	return (le16_to_cpu(entry->e_value_size) == size) &&
+					!memcmp(pval, value, size);
+}
+
+static int __f2fs_setxattr(struct inode *inode, int index,
+			const char *name, const void *value, size_t size,
+			struct folio *ifolio, int flags)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct f2fs_xattr_entry *here, *last;
+	void *base_addr, *last_base_addr;
+	int found, newsize;
+	size_t len;
+	__u32 new_hsize;
+	int error;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (value == NULL)
+		size = 0;
+
+	len = strlen(name);
+
+	if (len > F2FS_NAME_LEN)
+		return -ERANGE;
+
+	if (size > MAX_VALUE_LEN(inode))
+		return -E2BIG;
+retry:
+	error = read_all_xattrs(inode, ifolio, &base_addr);
+	if (error)
+		return error;
+
+	last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
+
+	/* find entry with wanted name. */
+	here = __find_xattr(base_addr, last_base_addr, NULL, index, len, name);
+	if (!here) {
+		if (!F2FS_I(inode)->i_xattr_nid) {
+			error = f2fs_recover_xattr_data(inode, NULL);
+			f2fs_notice(F2FS_I_SB(inode),
+				"recover xattr in inode (%llu), error(%d)",
+					inode->i_ino, error);
+			if (!error) {
+				kfree(base_addr);
+				goto retry;
+			}
+		}
+		f2fs_err(F2FS_I_SB(inode), "set inode (%llu) has corrupted xattr",
+								inode->i_ino);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+		error = -EFSCORRUPTED;
+		f2fs_handle_error(F2FS_I_SB(inode),
+					ERROR_CORRUPTED_XATTR);
+		fserror_report_file_metadata(inode, error, GFP_NOFS);
+		goto exit;
+	}
+
+	found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
+
+	if (found) {
+		if ((flags & XATTR_CREATE)) {
+			error = -EEXIST;
+			goto exit;
+		}
+
+		if (value && f2fs_xattr_value_same(here, value, size))
+			goto same;
+	} else if ((flags & XATTR_REPLACE)) {
+		error = -ENODATA;
+		goto exit;
+	}
+
+	last = here;
+	while (!IS_XATTR_LAST_ENTRY(last)) {
+		if ((void *)(last) + sizeof(__u32) > last_base_addr ||
+			(void *)XATTR_NEXT_ENTRY(last) > last_base_addr) {
+			f2fs_err(F2FS_I_SB(inode), "inode (%llu) has invalid last xattr entry, entry_size: %zu",
+					inode->i_ino, ENTRY_SIZE(last));
+			set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+			error = -EFSCORRUPTED;
+			f2fs_handle_error(F2FS_I_SB(inode),
+						ERROR_CORRUPTED_XATTR);
+			fserror_report_file_metadata(inode, error, GFP_NOFS);
+			goto exit;
+		}
+		last = XATTR_NEXT_ENTRY(last);
+	}
+
+	newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size);
+
+	/* 1. Check space */
+	if (value) {
+		int free;
+		/*
+		 * If value is NULL, it is remove operation.
+		 * In case of update operation, we calculate free.
+		 */
+		free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr);
+		if (found)
+			free = free + ENTRY_SIZE(here);
+
+		if (unlikely(free < newsize)) {
+			error = -E2BIG;
+			goto exit;
+		}
+	}
+
+	/* 2. Remove old entry */
+	if (found) {
+		/*
+		 * If entry is found, remove old entry.
+		 * If not found, remove operation is not needed.
+		 */
+		struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
+		int oldsize = ENTRY_SIZE(here);
+
+		memmove(here, next, (char *)last - (char *)next);
+		last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
+		memset(last, 0, oldsize);
+	}
+
+	new_hsize = (char *)last - (char *)base_addr;
+
+	/* 3. Write new entry */
+	if (value) {
+		char *pval;
+		/*
+		 * Before we come here, old entry is removed.
+		 * We just write new entry.
+		 */
+		last->e_name_index = index;
+		last->e_name_len = len;
+		memcpy(last->e_name, name, len);
+		pval = last->e_name + len;
+		memcpy(pval, value, size);
+		last->e_value_size = cpu_to_le16(size);
+		new_hsize += newsize;
+		/*
+		 * Explicitly add the null terminator.  The unused xattr space
+		 * is supposed to always be zeroed, which would make this
+		 * unnecessary, but don't depend on that.
+		 */
+		*(u32 *)((u8 *)last + newsize) = 0;
+	}
+
+	error = write_all_xattrs(inode, new_hsize, base_addr, ifolio);
+	if (error)
+		goto exit;
+
+	if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
+			!strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
+		f2fs_set_encrypted_inode(inode);
+
+	if (!S_ISDIR(inode->i_mode))
+		goto same;
+	/*
+	 * In restrict mode, fsync() always try to trigger checkpoint for all
+	 * metadata consistency, in other mode, it triggers checkpoint when
+	 * parent's xattr metadata was updated.
+	 */
+	if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
+		set_sbi_flag(sbi, SBI_NEED_CP);
+	else
+		f2fs_add_ino_entry(sbi, inode->i_ino, XATTR_DIR_INO);
+same:
+	if (is_inode_flag_set(inode, FI_ACL_MODE)) {
+		inode->i_mode = F2FS_I(inode)->i_acl_mode;
+		clear_inode_flag(inode, FI_ACL_MODE);
+	}
+
+	inode_set_ctime_current(inode);
+	f2fs_mark_inode_dirty_sync(inode, true);
+exit:
+	kfree(base_addr);
+	return error;
+}
+
+int f2fs_setxattr(struct inode *inode, int index, const char *name,
+				const void *value, size_t size,
+				struct folio *ifolio, int flags)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct f2fs_lock_context lc;
+	int err;
+
+	if (unlikely(f2fs_cp_error(sbi)))
+		return -EIO;
+	if (!f2fs_is_checkpoint_ready(sbi))
+		return -ENOSPC;
+
+	err = f2fs_dquot_initialize(inode);
+	if (err)
+		return err;
+
+	/* this case is only from f2fs_init_inode_metadata */
+	if (ifolio)
+		return __f2fs_setxattr(inode, index, name, value,
+						size, ifolio, flags);
+	f2fs_balance_fs(sbi, true);
+
+	f2fs_lock_op(sbi, &lc);
+	f2fs_down_write(&F2FS_I(inode)->i_xattr_sem);
+	err = __f2fs_setxattr(inode, index, name, value, size, NULL, flags);
+	f2fs_up_write(&F2FS_I(inode)->i_xattr_sem);
+	f2fs_unlock_op(sbi, &lc);
+
+	f2fs_update_time(sbi, REQ_TIME);
+	return err;
+}
+
+int __init f2fs_init_xattr_cache(void)
+{
+	inline_xattr_slab = f2fs_kmem_cache_create("f2fs_xattr_entry",
+					DEFAULT_XATTR_SLAB_SIZE);
+	return inline_xattr_slab ? 0 : -ENOMEM;
+}
+
+void f2fs_destroy_xattr_cache(void)
+{
+	kmem_cache_destroy(inline_xattr_slab);
+}
\ No newline at end of file