/*
 * Called at the last iput() if i_nlink is zero
 */
void f2fs_evict_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	nid_t xnid = F2FS_I(inode)->i_xattr_nid;

	trace_f2fs_evict_inode(inode);
	truncate_inode_pages_final(&inode->i_data);

	if (inode->i_ino == F2FS_NODE_INO(sbi) ||
			inode->i_ino == F2FS_META_INO(sbi))
		goto out_clear;

	f2fs_bug_on(get_dirty_dents(inode));
	remove_dirty_dir_inode(inode);

	if (inode->i_nlink || is_bad_inode(inode))
		goto no_delete;

	sb_start_intwrite(inode->i_sb);
	set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
	i_size_write(inode, 0);

	if (F2FS_HAS_BLOCKS(inode))
		f2fs_truncate(inode);

	f2fs_lock_op(sbi);
	remove_inode_page(inode);
	stat_dec_inline_inode(inode);
	f2fs_unlock_op(sbi);

	sb_end_intwrite(inode->i_sb);
no_delete:
	invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
	if (xnid)
		invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
	if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE))
		add_dirty_inode(sbi, inode->i_ino, APPEND_INO);
	if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE))
		add_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
out_clear:
	clear_inode(inode);
}

static int __allocate_data_block(struct dnode_of_data *dn)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
	struct f2fs_inode_info *fi = F2FS_I(dn->inode);
	struct f2fs_summary sum;
	struct node_info ni;
	int seg = CURSEG_WARM_DATA;
	pgoff_t fofs;

	if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
		return -EPERM;

	dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
	if (dn->data_blkaddr == NEW_ADDR)
		goto alloc;

	if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1)))
		return -ENOSPC;

alloc:
	get_node_info(sbi, dn->nid, &ni);
	set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);

	if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page)
		seg = CURSEG_DIRECT_IO;

	allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr,
								&sum, seg);
	set_data_blkaddr(dn);

	/* update i_size */
	fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
							dn->ofs_in_node;
	if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT))
		i_size_write(dn->inode,
				((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT));

	/* direct IO doesn't use extent cache to maximize the performance */
	f2fs_drop_largest_extent(dn->inode, fofs);

	return 0;
}

static int wrapfs_link(struct dentry *old_dentry, struct inode *dir,
		       struct dentry *new_dentry)
{
	struct dentry *lower_old_dentry;
	struct dentry *lower_new_dentry;
	struct dentry *lower_dir_dentry;
	u64 file_size_save;
	int err;
	struct path lower_old_path, lower_new_path;

	file_size_save = i_size_read(old_dentry->d_inode);
	wrapfs_get_lower_path(old_dentry, &lower_old_path);
	wrapfs_get_lower_path(new_dentry, &lower_new_path);
	lower_old_dentry = lower_old_path.dentry;
	lower_new_dentry = lower_new_path.dentry;
	lower_dir_dentry = lock_parent(lower_new_dentry);

	err = mnt_want_write(lower_new_path.mnt);
	if (err)
		goto out_unlock;

	err = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
		       lower_new_dentry);
	if (err || !lower_new_dentry->d_inode)
		goto out;

	err = wrapfs_interpose(new_dentry, dir->i_sb, &lower_new_path);
	if (err)
		goto out;
	fsstack_copy_attr_times(dir, lower_new_dentry->d_inode);
	fsstack_copy_inode_size(dir, lower_new_dentry->d_inode);
	set_nlink(old_dentry->d_inode,
		  wrapfs_lower_inode(old_dentry->d_inode)->i_nlink);
	i_size_write(new_dentry->d_inode, file_size_save);
out:
	mnt_drop_write(lower_new_path.mnt);
out_unlock:
	unlock_dir(lower_dir_dentry);
	wrapfs_put_lower_path(old_dentry, &lower_old_path);
	wrapfs_put_lower_path(new_dentry, &lower_new_path);
	return err;
}

static int kdbus_memfd_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct kdbus_memfile *mf = file->private_data;
	int ret = 0;

	if (vma->vm_flags & VM_WRITE) {
		size_t size;
		struct inode *inode;

		/*
		 * Deny a writable mapping to a sealed file.
		 *
		 * Avoid a deadlock and do not take mf->lock here, the call to
		 * mmap() already holds mm->mmap_sem.
		 * To protect KDBUS_CMD_MEMFD_SEAL_SET racing against us,
		 * mf->sealed is changed only with mm->mmap_sem held.
		 */
		if (mf->sealed) {
			ret = -EPERM;
			goto exit;
		}

		/*
		 * Extend the size of the shmem file to the
		 * size of the mapping
		 */
		size = (vma->vm_end - vma->vm_start) +
		       (vma->vm_pgoff << PAGE_SHIFT);
		inode = file_inode(mf->fp);
		if (size > PAGE_ALIGN(i_size_read(inode)))
			i_size_write(inode, size);
	}

	/* replace the anoymous inode file with our shmem file */
	if (vma->vm_file)
		fput(vma->vm_file);
	vma->vm_file = get_file(mf->fp);
	ret = mf->fp->f_op->mmap(file, vma);

exit:
	return ret;
}

static int f2fs_drop_inode(struct inode *inode)
{
	/*
	 * This is to avoid a deadlock condition like below.
	 * writeback_single_inode(inode)
	 *  - f2fs_write_data_page
	 *    - f2fs_gc -> iput -> evict
	 *       - inode_wait_for_writeback(inode)
	 */
	if (!inode_unhashed(inode) && inode->i_state & I_SYNC) {
		if (!inode->i_nlink && !is_bad_inode(inode)) {
			/* to avoid evict_inode call simultaneously */
			atomic_inc(&inode->i_count);
			spin_unlock(&inode->i_lock);

			/* some remained atomic pages should discarded */
			if (f2fs_is_atomic_file(inode))
				commit_inmem_pages(inode, true);

			/* should remain fi->extent_tree for writepage */
			f2fs_destroy_extent_node(inode);

			sb_start_intwrite(inode->i_sb);
			i_size_write(inode, 0);

			if (F2FS_HAS_BLOCKS(inode))
				f2fs_truncate(inode, true);

			sb_end_intwrite(inode->i_sb);

#ifdef CONFIG_F2FS_FS_ENCRYPTION
			if (F2FS_I(inode)->i_crypt_info)
				f2fs_free_encryption_info(inode,
					F2FS_I(inode)->i_crypt_info);
#endif
			spin_lock(&inode->i_lock);
			atomic_dec(&inode->i_count);
		}
		return 0;
	}
	return generic_drop_inode(inode);
}

void fsstack_copy_inode_size(struct inode *dst, struct inode *src)
{
	loff_t i_size;
	blkcnt_t i_blocks;

	i_size = i_size_read(src);

	if (sizeof(i_blocks) > sizeof(long))
		spin_lock(&src->i_lock);
	i_blocks = src->i_blocks;
	if (sizeof(i_blocks) > sizeof(long))
		spin_unlock(&src->i_lock);

	if (sizeof(i_size) > sizeof(long) || sizeof(i_blocks) > sizeof(long))
		spin_lock(&dst->i_lock);
	i_size_write(dst, i_size);
	dst->i_blocks = i_blocks;
	if (sizeof(i_size) > sizeof(long) || sizeof(i_blocks) > sizeof(long))
		spin_unlock(&dst->i_lock);
}

static int f2fs_write_end(struct file *file,
                        struct address_space *mapping,
                        loff_t pos, unsigned len, unsigned copied,
                        struct page *page, void *fsdata)
{
        struct inode *inode = page->mapping->host;

        trace_f2fs_write_end(inode, pos, len, copied);

        set_page_dirty(page);

        if (pos + copied > i_size_read(inode)) {
                i_size_write(inode, pos + copied);
                mark_inode_dirty(inode);
                update_inode_page(inode);
        }

        f2fs_put_page(page, 1);
        return copied;
}

/* caller should call f2fs_lock_op() */
void handle_failed_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	clear_nlink(inode);
	make_bad_inode(inode);
	unlock_new_inode(inode);

	i_size_write(inode, 0);
	if (F2FS_HAS_BLOCKS(inode))
		f2fs_truncate(inode, false);

	remove_inode_page(inode);

	set_inode_flag(F2FS_I(inode), FI_FREE_NID);
	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
}

int make_empty_inline_dir(struct inode *inode, struct inode *parent,
                          struct page *ipage)
{
    struct f2fs_inline_dentry *dentry_blk;
    struct f2fs_dentry_ptr d;

    dentry_blk = inline_data_addr(ipage);

    make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
    do_make_empty_dir(inode, parent, &d);

    set_page_dirty(ipage);

    /* update i_size to MAX_INLINE_DATA */
    if (i_size_read(inode) < MAX_INLINE_DATA) {
        i_size_write(inode, MAX_INLINE_DATA);
        set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR);
    }
    return 0;
}

/*
 * after copy_from_user, pages need to be dirtied and we need to make
 * sure holes are created between the current EOF and the start of
 * any next extents (if required).
 *
 * this also makes the decision about creating an inline extent vs
 * doing real data extents, marking pages dirty and delalloc as required.
 */
static noinline int dirty_and_release_pages(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   struct file *file,
				   struct page **pages,
				   size_t num_pages,
				   loff_t pos,
				   size_t write_bytes)
{
	int err = 0;
	int i;
	struct inode *inode = fdentry(file)->d_inode;
	u64 num_bytes;
	u64 start_pos;
	u64 end_of_last_block;
	u64 end_pos = pos + write_bytes;
	loff_t isize = i_size_read(inode);

	start_pos = pos & ~((u64)root->sectorsize - 1);
	num_bytes = (write_bytes + pos - start_pos +
		    root->sectorsize - 1) & ~((u64)root->sectorsize - 1);

	end_of_last_block = start_pos + num_bytes - 1;
	err = btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block);
	if (err)
		return err;

	for (i = 0; i < num_pages; i++) {
		struct page *p = pages[i];
		SetPageUptodate(p);
		ClearPageChecked(p);
		set_page_dirty(p);
	}
	if (end_pos > isize) {
		i_size_write(inode, end_pos);
		/* we've only changed i_size in ram, and we haven't updated
		 * the disk i_size.  There is no need to log the inode
		 * at this time.
		 */
	}
	return err;
}

static int replayfs_commit_write(struct file *file, struct page *page,
		unsigned from, unsigned to) {
	struct inode *inode;
	loff_t pos;

	pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;

	inode = page->mapping->host;

	ClearPageDirty(page);

	SetPageUptodate(page);
	kunmap(page);

	if (pos > inode->i_size) {
		i_size_write(inode, pos);
		mark_inode_dirty(inode);
	}

	return 0;
}

/* caller should call f2fs_lock_op() */
void handle_failed_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	clear_nlink(inode);
	make_bad_inode(inode);
	unlock_new_inode(inode);

	i_size_write(inode, 0);
	if (F2FS_HAS_BLOCKS(inode))
		f2fs_truncate(inode);

	remove_inode_page(inode);
	stat_dec_inline_inode(inode);

	alloc_nid_failed(sbi, inode->i_ino);
	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
}

static int vvp_do_vmtruncate(struct inode *inode, size_t size)
{
	int     result;
	loff_t oldsize;

	/*
	 * Only ll_inode_size_lock is taken at this level.
	 */
	ll_inode_size_lock(inode);
	result = inode_newsize_ok(inode, size);
	if (result < 0) {
		ll_inode_size_unlock(inode);
		return result;
	}
	oldsize = inode->i_size;
	i_size_write(inode, size);

	truncate_pagecache(inode, oldsize, size);
	ll_inode_size_unlock(inode);
	return result;
}

static int amdgpu_debugfs_ring_init(struct amdgpu_device *adev,
                                    struct amdgpu_ring *ring)
{
#if defined(CONFIG_DEBUG_FS)
    struct drm_minor *minor = adev->ddev->primary;
    struct dentry *ent, *root = minor->debugfs_root;
    char name[32];

    sprintf(name, "amdgpu_ring_%s", ring->name);

    ent = debugfs_create_file(name,
                              S_IFREG | S_IRUGO, root,
                              ring, &amdgpu_debugfs_ring_fops);
    if (IS_ERR(ent))
        return PTR_ERR(ent);

    i_size_write(ent->d_inode, ring->ring_size + 12);
    ring->ent = ent;
#endif
    return 0;
}

/*
 * Enable device.
 * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection
 */
static int
dasd_ioctl_enable(struct block_device *bdev)
{
	struct dasd_device *base;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	base = dasd_device_from_gendisk(bdev->bd_disk);
	if (!base)
		return -ENODEV;

	dasd_enable_device(base);
	/* Formatting the dasd device can change the capacity. */
	mutex_lock(&bdev->bd_mutex);
	i_size_write(bdev->bd_inode,
		     (loff_t)get_capacity(base->block->gdp) << 9);
	mutex_unlock(&bdev->bd_mutex);
	dasd_put_device(base);
	return 0;
}

int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
				  unsigned len, unsigned copied,
				  struct page *page)
{
	int i_size_changed = 0;
	int ret;

	ret = ext4_write_inline_data_end(inode, pos, len, copied, page);
	if (ret < 0) {
		unlock_page(page);
		put_page(page);
		return ret;
	}
	copied = ret;

	/*
	 * No need to use i_size_read() here, the i_size
	 * cannot change under us because we hold i_mutex.
	 *
	 * But it's important to update i_size while still holding page lock:
	 * page writeout could otherwise come in and zero beyond i_size.
	 */
	if (pos+copied > inode->i_size) {
		i_size_write(inode, pos+copied);
		i_size_changed = 1;
	}
	unlock_page(page);
	put_page(page);

	/*
	 * Don't mark the inode dirty under page lock. First, it unnecessarily
	 * makes the holding time of page lock longer. Second, it forces lock
	 * ordering of page lock and transaction start for journaling
	 * filesystems.
	 */
	if (i_size_changed)
		mark_inode_dirty(inode);

	return copied;
}

static int vvp_attr_update(const struct lu_env *env, struct cl_object *obj,
			   const struct cl_attr *attr, unsigned valid)
{
	struct inode *inode = vvp_object_inode(obj);

	if (valid & CAT_UID)
		inode->i_uid = make_kuid(&init_user_ns, attr->cat_uid);
	if (valid & CAT_GID)
		inode->i_gid = make_kgid(&init_user_ns, attr->cat_gid);
	if (valid & CAT_ATIME)
		inode->i_atime.tv_sec = attr->cat_atime;
	if (valid & CAT_MTIME)
		inode->i_mtime.tv_sec = attr->cat_mtime;
	if (valid & CAT_CTIME)
		inode->i_ctime.tv_sec = attr->cat_ctime;
	if (0 && valid & CAT_SIZE)
		i_size_write(inode, attr->cat_size);
	/* not currently necessary */
	if (0 && valid & (CAT_UID|CAT_GID|CAT_SIZE))
		mark_inode_dirty(inode);
	return 0;
}

void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid)
{
	valid &= src->o_valid;

	LASSERTF(!(valid & (OBD_MD_FLTYPE | OBD_MD_FLGENER | OBD_MD_FLFID |
			    OBD_MD_FLID | OBD_MD_FLGROUP)),
		 "object "DOSTID", valid %x\n", POSTID(&src->o_oi), valid);

	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
		CDEBUG(D_INODE,
		       "valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
		       src->o_valid, LTIME_S(dst->i_mtime),
		       LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);

	if (valid & OBD_MD_FLATIME)
		LTIME_S(dst->i_atime) = src->o_atime;
	if (valid & OBD_MD_FLMTIME)
		LTIME_S(dst->i_mtime) = src->o_mtime;
	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
		LTIME_S(dst->i_ctime) = src->o_ctime;
	if (valid & OBD_MD_FLSIZE)
		i_size_write(dst, src->o_size);
	if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
		dst->i_blocks = src->o_blocks;
		if (dst->i_blocks < src->o_blocks) /* overflow */
			dst->i_blocks = -1;

	}
	if (valid & OBD_MD_FLBLKSZ)
		dst->i_blkbits = ffs(src->o_blksize)-1;
	if (valid & OBD_MD_FLMODE)
		dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
	if (valid & OBD_MD_FLUID)
		dst->i_uid = make_kuid(&init_user_ns, src->o_uid);
	if (valid & OBD_MD_FLGID)
		dst->i_gid = make_kgid(&init_user_ns, src->o_gid);
	if (valid & OBD_MD_FLFLAGS)
		dst->i_flags = src->o_flags;
}

/* caller should call f2fs_lock_op() */
void handle_failed_inode(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	int err = 0;

	clear_nlink(inode);
	make_bad_inode(inode);
	unlock_new_inode(inode);

	i_size_write(inode, 0);
	if (F2FS_HAS_BLOCKS(inode))
		err = f2fs_truncate(inode, false);

	if (!err)
		err = remove_inode_page(inode);

	/*
	 * if we skip truncate_node in remove_inode_page bacause we failed
	 * before, it's better to find another way to release resource of
	 * this inode (e.g. valid block count, node block or nid). Here we
	 * choose to add this inode to orphan list, so that we can call iput
	 * for releasing in orphan recovery flow.
	 *
	 * Note: we should add inode to orphan list before f2fs_unlock_op()
	 * so we can prevent losing this orphan when encoutering checkpoint
	 * and following suddenly power-off.
	 */
	if (err && err != -ENOENT) {
		err = acquire_orphan_inode(sbi);
		if (!err)
			add_orphan_inode(sbi, inode->i_ino);
	}

	set_inode_flag(F2FS_I(inode), FI_FREE_NID);
	f2fs_unlock_op(sbi);

	/* iput will drop the inode object */
	iput(inode);
}

static void recover_inode(struct inode *inode, struct page *page)
{
	struct f2fs_inode *raw = F2FS_INODE(page);
	char *name;

	inode->i_mode = le16_to_cpu(raw->i_mode);
	i_size_write(inode, le64_to_cpu(raw->i_size));
	inode->i_atime.tv_sec = le64_to_cpu(raw->i_mtime);
	inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime);
	inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime);
	inode->i_atime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
	inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec);
	inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);

	if (file_enc_name(inode))
		name = "<encrypted>";
	else
		name = F2FS_INODE(page)->i_name;

	f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode: ino = %x, name = %s",
			ino_of_node(page), name);
}