개념 설명 전체 · v6.18.37 / fs/f2fs/file.c

    1 // SPDX-License-Identifier: GPL-2.0
    2 /*
    3  * fs/f2fs/file.c
    4  *
    5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
    6  *             http://www.samsung.com/
    7  */
    8 #include <linux/fs.h>
    9 #include <linux/f2fs_fs.h>
   10 #include <linux/stat.h>
   11 #include <linux/writeback.h>
   12 #include <linux/blkdev.h>
   13 #include <linux/falloc.h>
   14 #include <linux/types.h>
   15 #include <linux/compat.h>
   16 #include <linux/uaccess.h>
   17 #include <linux/mount.h>
   18 #include <linux/pagevec.h>
   19 #include <linux/uio.h>
   20 #include <linux/uuid.h>
   21 #include <linux/file.h>
   22 #include <linux/nls.h>
   23 #include <linux/sched/signal.h>
   24 #include <linux/fileattr.h>
   25 #include <linux/fadvise.h>
   26 #include <linux/iomap.h>
   27 
   28 #include "f2fs.h"
   29 #include "node.h"
   30 #include "segment.h"
   31 #include "xattr.h"
   32 #include "acl.h"
   33 #include "gc.h"
   34 #include "iostat.h"
   35 #include <trace/events/f2fs.h>
   36 #include <uapi/linux/f2fs.h>
   37 
   38 static void f2fs_zero_post_eof_page(struct inode *inode,
   39 					loff_t new_size, bool lock)
   40 {
   41 	loff_t old_size = i_size_read(inode);
   42 
   43 	if (old_size >= new_size)
   44 		return;
   45 
   46 	if (mapping_empty(inode->i_mapping))
   47 		return;
   48 
   49 	if (lock)
   50 		filemap_invalidate_lock(inode->i_mapping);
   51 	/* zero or drop pages only in range of [old_size, new_size] */
   52 	truncate_inode_pages_range(inode->i_mapping, old_size, new_size);
   53 	if (lock)
   54 		filemap_invalidate_unlock(inode->i_mapping);
   55 }
   56 
   57 static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
   58 {
   59 	struct inode *inode = file_inode(vmf->vma->vm_file);
   60 	vm_flags_t flags = vmf->vma->vm_flags;
   61 	vm_fault_t ret;
   62 
   63 	ret = filemap_fault(vmf);
   64 	if (ret & VM_FAULT_LOCKED)
   65 		f2fs_update_iostat(F2FS_I_SB(inode), inode,
   66 					APP_MAPPED_READ_IO, F2FS_BLKSIZE);
   67 
   68 	trace_f2fs_filemap_fault(inode, vmf->pgoff, flags, ret);
   69 
   70 	return ret;
   71 }
   72 
   73 static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
   74 {
   75 	struct folio *folio = page_folio(vmf->page);
   76 	struct inode *inode = file_inode(vmf->vma->vm_file);
   77 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
   78 	struct dnode_of_data dn;
   79 	bool need_alloc = !f2fs_is_pinned_file(inode);
   80 	int err = 0;
   81 	vm_fault_t ret;
   82 
   83 	if (unlikely(IS_IMMUTABLE(inode)))
   84 		return VM_FAULT_SIGBUS;
   85 
   86 	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
   87 		err = -EIO;
   88 		goto out;
   89 	}
   90 
   91 	if (unlikely(f2fs_cp_error(sbi))) {
   92 		err = -EIO;
   93 		goto out;
   94 	}
   95 
   96 	if (!f2fs_is_checkpoint_ready(sbi)) {
   97 		err = -ENOSPC;
   98 		goto out;
   99 	}
  100 
  101 	err = f2fs_convert_inline_inode(inode);
  102 	if (err)
  103 		goto out;
  104 
  105 #ifdef CONFIG_F2FS_FS_COMPRESSION
  106 	if (f2fs_compressed_file(inode)) {
  107 		int ret = f2fs_is_compressed_cluster(inode, folio->index);
  108 
  109 		if (ret < 0) {
  110 			err = ret;
  111 			goto out;
  112 		} else if (ret) {
  113 			need_alloc = false;
  114 		}
  115 	}
  116 #endif
  117 	/* should do out of any locked page */
  118 	if (need_alloc)
  119 		f2fs_balance_fs(sbi, true);
  120 
  121 	sb_start_pagefault(inode->i_sb);
  122 
  123 	f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
  124 
  125 	f2fs_zero_post_eof_page(inode, (folio->index + 1) << PAGE_SHIFT, true);
  126 
  127 	file_update_time(vmf->vma->vm_file);
  128 	filemap_invalidate_lock_shared(inode->i_mapping);
  129 
  130 	folio_lock(folio);
  131 	if (unlikely(folio->mapping != inode->i_mapping ||
  132 			folio_pos(folio) > i_size_read(inode) ||
  133 			!folio_test_uptodate(folio))) {
  134 		folio_unlock(folio);
  135 		err = -EFAULT;
  136 		goto out_sem;
  137 	}
  138 
  139 	set_new_dnode(&dn, inode, NULL, NULL, 0);
  140 	if (need_alloc) {
  141 		/* block allocation */
  142 		err = f2fs_get_block_locked(&dn, folio->index);
  143 	} else {
  144 		err = f2fs_get_dnode_of_data(&dn, folio->index, LOOKUP_NODE);
  145 		f2fs_put_dnode(&dn);
  146 		if (f2fs_is_pinned_file(inode) &&
  147 		    !__is_valid_data_blkaddr(dn.data_blkaddr))
  148 			err = -EIO;
  149 	}
  150 
  151 	if (err) {
  152 		folio_unlock(folio);
  153 		goto out_sem;
  154 	}
  155 
  156 	f2fs_folio_wait_writeback(folio, DATA, false, true);
  157 
  158 	/* wait for GCed page writeback via META_MAPPING */
  159 	f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
  160 
  161 	/*
  162 	 * check to see if the page is mapped already (no holes)
  163 	 */
  164 	if (folio_test_mappedtodisk(folio))
  165 		goto out_sem;
  166 
  167 	/* page is wholly or partially inside EOF */
  168 	if (((loff_t)(folio->index + 1) << PAGE_SHIFT) >
  169 						i_size_read(inode)) {
  170 		loff_t offset;
  171 
  172 		offset = i_size_read(inode) & ~PAGE_MASK;
  173 		folio_zero_segment(folio, offset, folio_size(folio));
  174 	}
  175 	folio_mark_dirty(folio);
  176 
  177 	f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE);
  178 	f2fs_update_time(sbi, REQ_TIME);
  179 
  180 out_sem:
  181 	filemap_invalidate_unlock_shared(inode->i_mapping);
  182 
  183 	sb_end_pagefault(inode->i_sb);
  184 out:
  185 	ret = vmf_fs_error(err);
  186 
  187 	trace_f2fs_vm_page_mkwrite(inode, folio->index, vmf->vma->vm_flags, ret);
  188 	return ret;
  189 }
  190 
  191 static const struct vm_operations_struct f2fs_file_vm_ops = {
  192 	.fault		= f2fs_filemap_fault,
  193 	.map_pages	= filemap_map_pages,
  194 	.page_mkwrite	= f2fs_vm_page_mkwrite,
  195 };
  196 
  197 static int get_parent_ino(struct inode *inode, nid_t *pino)
  198 {
  199 	struct dentry *dentry;
  200 
  201 	/*
  202 	 * Make sure to get the non-deleted alias.  The alias associated with
  203 	 * the open file descriptor being fsync()'ed may be deleted already.
  204 	 */
  205 	dentry = d_find_alias(inode);
  206 	if (!dentry)
  207 		return 0;
  208 
  209 	*pino = d_parent_ino(dentry);
  210 	dput(dentry);
  211 	return 1;
  212 }
  213 
  214 static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
  215 {
  216 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
  217 	enum cp_reason_type cp_reason = CP_NO_NEEDED;
  218 
  219 	if (!S_ISREG(inode->i_mode))
  220 		cp_reason = CP_NON_REGULAR;
  221 	else if (f2fs_compressed_file(inode))
  222 		cp_reason = CP_COMPRESSED;
  223 	else if (inode->i_nlink != 1)
  224 		cp_reason = CP_HARDLINK;
  225 	else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
  226 		cp_reason = CP_SB_NEED_CP;
  227 	else if (file_wrong_pino(inode))
  228 		cp_reason = CP_WRONG_PINO;
  229 	else if (!f2fs_space_for_roll_forward(sbi))
  230 		cp_reason = CP_NO_SPC_ROLL;
  231 	else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
  232 		cp_reason = CP_NODE_NEED_CP;
  233 	else if (test_opt(sbi, FASTBOOT))
  234 		cp_reason = CP_FASTBOOT_MODE;
  235 	else if (F2FS_OPTION(sbi).active_logs == 2)
  236 		cp_reason = CP_SPEC_LOG_NUM;
  237 	else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
  238 		f2fs_need_dentry_mark(sbi, inode->i_ino) &&
  239 		f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
  240 							TRANS_DIR_INO))
  241 		cp_reason = CP_RECOVER_DIR;
  242 	else if (f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
  243 							XATTR_DIR_INO))
  244 		cp_reason = CP_XATTR_DIR;
  245 
  246 	return cp_reason;
  247 }
  248 
  249 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
  250 {
  251 	struct folio *i = filemap_get_folio(NODE_MAPPING(sbi), ino);
  252 	bool ret = false;
  253 	/* But we need to avoid that there are some inode updates */
  254 	if ((!IS_ERR(i) && folio_test_dirty(i)) ||
  255 	    f2fs_need_inode_block_update(sbi, ino))
  256 		ret = true;
  257 	f2fs_folio_put(i, false);
  258 	return ret;
  259 }
  260 
  261 static void try_to_fix_pino(struct inode *inode)
  262 {
  263 	struct f2fs_inode_info *fi = F2FS_I(inode);
  264 	nid_t pino;
  265 
  266 	f2fs_down_write(&fi->i_sem);
  267 	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
  268 			get_parent_ino(inode, &pino)) {
  269 		f2fs_i_pino_write(inode, pino);
  270 		file_got_pino(inode);
  271 	}
  272 	f2fs_up_write(&fi->i_sem);
  273 }
  274 
  275 static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
  276 						int datasync, bool atomic)
  277 {
  278 	struct inode *inode = file->f_mapping->host;
  279 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
  280 	nid_t ino = inode->i_ino;
  281 	int ret = 0;
  282 	enum cp_reason_type cp_reason = 0;
  283 	struct writeback_control wbc = {
  284 		.sync_mode = WB_SYNC_ALL,
  285 		.nr_to_write = LONG_MAX,
  286 	};
  287 	unsigned int seq_id = 0;
  288 
  289 	if (unlikely(f2fs_readonly(inode->i_sb)))
  290 		return 0;
  291 
  292 	trace_f2fs_sync_file_enter(inode);
  293 
  294 	if (S_ISDIR(inode->i_mode))
  295 		goto go_write;
  296 
  297 	/* if fdatasync is triggered, let's do in-place-update */
  298 	if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
  299 		set_inode_flag(inode, FI_NEED_IPU);
  300 	ret = file_write_and_wait_range(file, start, end);
  301 	clear_inode_flag(inode, FI_NEED_IPU);
  302 
  303 	if (ret || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
  304 		trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
  305 		return ret;
  306 	}
  307 
  308 	/* if the inode is dirty, let's recover all the time */
  309 	if (!f2fs_skip_inode_update(inode, datasync)) {
  310 		f2fs_write_inode(inode, NULL);
  311 		goto go_write;
  312 	}
  313 
  314 	/*
  315 	 * if there is no written data, don't waste time to write recovery info.
  316 	 */
  317 	if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
  318 			!f2fs_exist_written_data(sbi, ino, APPEND_INO)) {
  319 
  320 		/* it may call write_inode just prior to fsync */
  321 		if (need_inode_page_update(sbi, ino))
  322 			goto go_write;
  323 
  324 		if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
  325 				f2fs_exist_written_data(sbi, ino, UPDATE_INO))
  326 			goto flush_out;
  327 		goto out;
  328 	} else {
  329 		/*
  330 		 * for OPU case, during fsync(), node can be persisted before
  331 		 * data when lower device doesn't support write barrier, result
  332 		 * in data corruption after SPO.
  333 		 * So for strict fsync mode, force to use atomic write semantics
  334 		 * to keep write order in between data/node and last node to
  335 		 * avoid potential data corruption.
  336 		 */
  337 		if (F2FS_OPTION(sbi).fsync_mode ==
  338 				FSYNC_MODE_STRICT && !atomic)
  339 			atomic = true;
  340 	}
  341 go_write:
  342 	/*
  343 	 * Both of fdatasync() and fsync() are able to be recovered from
  344 	 * sudden-power-off.
  345 	 */
  346 	f2fs_down_read(&F2FS_I(inode)->i_sem);
  347 	cp_reason = need_do_checkpoint(inode);
  348 	f2fs_up_read(&F2FS_I(inode)->i_sem);
  349 
  350 	if (cp_reason) {
  351 		/* all the dirty node pages should be flushed for POR */
  352 		ret = f2fs_sync_fs(inode->i_sb, 1);
  353 
  354 		/*
  355 		 * We've secured consistency through sync_fs. Following pino
  356 		 * will be used only for fsynced inodes after checkpoint.
  357 		 */
  358 		try_to_fix_pino(inode);
  359 		clear_inode_flag(inode, FI_APPEND_WRITE);
  360 		clear_inode_flag(inode, FI_UPDATE_WRITE);
  361 		goto out;
  362 	}
  363 sync_nodes:
  364 	atomic_inc(&sbi->wb_sync_req[NODE]);
  365 	ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);
  366 	atomic_dec(&sbi->wb_sync_req[NODE]);
  367 	if (ret)
  368 		goto out;
  369 
  370 	/* if cp_error was enabled, we should avoid infinite loop */
  371 	if (unlikely(f2fs_cp_error(sbi))) {
  372 		ret = -EIO;
  373 		goto out;
  374 	}
  375 
  376 	if (f2fs_need_inode_block_update(sbi, ino)) {
  377 		f2fs_mark_inode_dirty_sync(inode, true);
  378 		f2fs_write_inode(inode, NULL);
  379 		goto sync_nodes;
  380 	}
  381 
  382 	/*
  383 	 * If it's atomic_write, it's just fine to keep write ordering. So
  384 	 * here we don't need to wait for node write completion, since we use
  385 	 * node chain which serializes node blocks. If one of node writes are
  386 	 * reordered, we can see simply broken chain, resulting in stopping
  387 	 * roll-forward recovery. It means we'll recover all or none node blocks
  388 	 * given fsync mark.
  389 	 */
  390 	if (!atomic) {
  391 		ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);
  392 		if (ret)
  393 			goto out;
  394 	}
  395 
  396 	/* once recovery info is written, don't need to tack this */
  397 	f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
  398 	clear_inode_flag(inode, FI_APPEND_WRITE);
  399 flush_out:
  400 	if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
  401 		ret = f2fs_issue_flush(sbi, inode->i_ino);
  402 	if (!ret) {
  403 		f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
  404 		clear_inode_flag(inode, FI_UPDATE_WRITE);
  405 		f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);
  406 	}
  407 	f2fs_update_time(sbi, REQ_TIME);
  408 out:
  409 	trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
  410 	return ret;
  411 }
  412 
  413 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
  414 {
  415 	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
  416 		return -EIO;
  417 	return f2fs_do_sync_file(file, start, end, datasync, false);
  418 }
  419 
  420 static bool __found_offset(struct address_space *mapping,
  421 		struct dnode_of_data *dn, pgoff_t index, int whence)
  422 {
  423 	block_t blkaddr = f2fs_data_blkaddr(dn);
  424 	struct inode *inode = mapping->host;
  425 	bool compressed_cluster = false;
  426 
  427 	if (f2fs_compressed_file(inode)) {
  428 		block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_folio,
  429 		    ALIGN_DOWN(dn->ofs_in_node, F2FS_I(inode)->i_cluster_size));
  430 
  431 		compressed_cluster = first_blkaddr == COMPRESS_ADDR;
  432 	}
  433 
  434 	switch (whence) {
  435 	case SEEK_DATA:
  436 		if (__is_valid_data_blkaddr(blkaddr))
  437 			return true;
  438 		if (blkaddr == NEW_ADDR &&
  439 		    xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY))
  440 			return true;
  441 		if (compressed_cluster)
  442 			return true;
  443 		break;
  444 	case SEEK_HOLE:
  445 		if (compressed_cluster)
  446 			return false;
  447 		if (blkaddr == NULL_ADDR)
  448 			return true;
  449 		break;
  450 	}
  451 	return false;
  452 }
  453 
  454 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
  455 {
  456 	struct inode *inode = file->f_mapping->host;
  457 	loff_t maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode));
  458 	struct dnode_of_data dn;
  459 	pgoff_t pgofs, end_offset;
  460 	loff_t data_ofs = offset;
  461 	loff_t isize;
  462 	int err = 0;
  463 
  464 	inode_lock_shared(inode);
  465 
  466 	isize = i_size_read(inode);
  467 	if (offset >= isize)
  468 		goto fail;
  469 
  470 	/* handle inline data case */
  471 	if (f2fs_has_inline_data(inode)) {
  472 		if (whence == SEEK_HOLE) {
  473 			data_ofs = isize;
  474 			goto found;
  475 		} else if (whence == SEEK_DATA) {
  476 			data_ofs = offset;
  477 			goto found;
  478 		}
  479 	}
  480 
  481 	pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
  482 
  483 	for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
  484 		set_new_dnode(&dn, inode, NULL, NULL, 0);
  485 		err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
  486 		if (err && err != -ENOENT) {
  487 			goto fail;
  488 		} else if (err == -ENOENT) {
  489 			/* direct node does not exists */
  490 			if (whence == SEEK_DATA) {
  491 				pgofs = f2fs_get_next_page_offset(&dn, pgofs);
  492 				continue;
  493 			} else {
  494 				goto found;
  495 			}
  496 		}
  497 
  498 		end_offset = ADDRS_PER_PAGE(dn.node_folio, inode);
  499 
  500 		/* find data/hole in dnode block */
  501 		for (; dn.ofs_in_node < end_offset;
  502 				dn.ofs_in_node++, pgofs++,
  503 				data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
  504 			block_t blkaddr;
  505 
  506 			blkaddr = f2fs_data_blkaddr(&dn);
  507 
  508 			if (__is_valid_data_blkaddr(blkaddr) &&
  509 				!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
  510 					blkaddr, DATA_GENERIC_ENHANCE)) {
  511 				f2fs_put_dnode(&dn);
  512 				goto fail;
  513 			}
  514 
  515 			if (__found_offset(file->f_mapping, &dn,
  516 							pgofs, whence)) {
  517 				f2fs_put_dnode(&dn);
  518 				goto found;
  519 			}
  520 		}
  521 		f2fs_put_dnode(&dn);
  522 	}
  523 
  524 	if (whence == SEEK_DATA)
  525 		goto fail;
  526 found:
  527 	if (whence == SEEK_HOLE && data_ofs > isize)
  528 		data_ofs = isize;
  529 	inode_unlock_shared(inode);
  530 	return vfs_setpos(file, data_ofs, maxbytes);
  531 fail:
  532 	inode_unlock_shared(inode);
  533 	return -ENXIO;
  534 }
  535 
  536 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
  537 {
  538 	struct inode *inode = file->f_mapping->host;
  539 	loff_t maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode));
  540 
  541 	switch (whence) {
  542 	case SEEK_SET:
  543 	case SEEK_CUR:
  544 	case SEEK_END:
  545 		return generic_file_llseek_size(file, offset, whence,
  546 						maxbytes, i_size_read(inode));
  547 	case SEEK_DATA:
  548 	case SEEK_HOLE:
  549 		if (offset < 0)
  550 			return -ENXIO;
  551 		return f2fs_seek_block(file, offset, whence);
  552 	}
  553 
  554 	return -EINVAL;
  555 }
  556 
  557 static int f2fs_file_mmap_prepare(struct vm_area_desc *desc)
  558 {
  559 	struct file *file = desc->file;
  560 	struct inode *inode = file_inode(file);
  561 
  562 	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
  563 		return -EIO;
  564 
  565 	if (!f2fs_is_compress_backend_ready(inode))
  566 		return -EOPNOTSUPP;
  567 
  568 	file_accessed(file);
  569 	desc->vm_ops = &f2fs_file_vm_ops;
  570 
  571 	f2fs_down_read(&F2FS_I(inode)->i_sem);
  572 	set_inode_flag(inode, FI_MMAP_FILE);
  573 	f2fs_up_read(&F2FS_I(inode)->i_sem);
  574 
  575 	return 0;
  576 }
  577 
  578 static int finish_preallocate_blocks(struct inode *inode)
  579 {
  580 	int ret = 0;
  581 	bool opened;
  582 
  583 	f2fs_down_read(&F2FS_I(inode)->i_sem);
  584 	opened = is_inode_flag_set(inode, FI_OPENED_FILE);
  585 	f2fs_up_read(&F2FS_I(inode)->i_sem);
  586 	if (opened)
  587 		return 0;
  588 
  589 	inode_lock(inode);
  590 	if (is_inode_flag_set(inode, FI_OPENED_FILE))
  591 		goto out_unlock;
  592 
  593 	if (!file_should_truncate(inode))
  594 		goto out_update;
  595 
  596 	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
  597 	filemap_invalidate_lock(inode->i_mapping);
  598 
  599 	truncate_setsize(inode, i_size_read(inode));
  600 	ret = f2fs_truncate(inode);
  601 
  602 	filemap_invalidate_unlock(inode->i_mapping);
  603 	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
  604 	if (ret)
  605 		goto out_unlock;
  606 
  607 	file_dont_truncate(inode);
  608 out_update:
  609 	f2fs_down_write(&F2FS_I(inode)->i_sem);
  610 	set_inode_flag(inode, FI_OPENED_FILE);
  611 	f2fs_up_write(&F2FS_I(inode)->i_sem);
  612 out_unlock:
  613 	inode_unlock(inode);
  614 	return ret;
  615 }
  616 
  617 static int f2fs_file_open(struct inode *inode, struct file *filp)
  618 {
  619 	int err = fscrypt_file_open(inode, filp);
  620 
  621 	if (err)
  622 		return err;
  623 
  624 	if (!f2fs_is_compress_backend_ready(inode))
  625 		return -EOPNOTSUPP;
  626 
  627 	err = fsverity_file_open(inode, filp);
  628 	if (err)
  629 		return err;
  630 
  631 	filp->f_mode |= FMODE_NOWAIT;
  632 	filp->f_mode |= FMODE_CAN_ODIRECT;
  633 
  634 	err = dquot_file_open(inode, filp);
  635 	if (err)
  636 		return err;
  637 
  638 	err = finish_preallocate_blocks(inode);
  639 	if (!err)
  640 		atomic_inc(&F2FS_I(inode)->open_count);
  641 	return err;
  642 }
  643 
  644 void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
  645 {
  646 	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
  647 	int nr_free = 0, ofs = dn->ofs_in_node, len = count;
  648 	__le32 *addr;
  649 	bool compressed_cluster = false;
  650 	int cluster_index = 0, valid_blocks = 0;
  651 	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
  652 	bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks);
  653 	block_t blkstart;
  654 	int blklen = 0;
  655 
  656 	addr = get_dnode_addr(dn->inode, dn->node_folio) + ofs;
  657 	blkstart = le32_to_cpu(*addr);
  658 
  659 	/* Assumption: truncation starts with cluster */
  660 	for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) {
  661 		block_t blkaddr = le32_to_cpu(*addr);
  662 
  663 		if (f2fs_compressed_file(dn->inode) &&
  664 					!(cluster_index & (cluster_size - 1))) {
  665 			if (compressed_cluster)
  666 				f2fs_i_compr_blocks_update(dn->inode,
  667 							valid_blocks, false);
  668 			compressed_cluster = (blkaddr == COMPRESS_ADDR);
  669 			valid_blocks = 0;
  670 		}
  671 
  672 		if (blkaddr == NULL_ADDR)
  673 			goto next;
  674 
  675 		f2fs_set_data_blkaddr(dn, NULL_ADDR);
  676 
  677 		if (__is_valid_data_blkaddr(blkaddr)) {
  678 			if (time_to_inject(sbi, FAULT_BLKADDR_CONSISTENCE))
  679 				goto next;
  680 			if (!f2fs_is_valid_blkaddr_raw(sbi, blkaddr,
  681 						DATA_GENERIC_ENHANCE))
  682 				goto next;
  683 			if (compressed_cluster)
  684 				valid_blocks++;
  685 		}
  686 
  687 		if (blkstart + blklen == blkaddr) {
  688 			blklen++;
  689 		} else {
  690 			f2fs_invalidate_blocks(sbi, blkstart, blklen);
  691 			blkstart = blkaddr;
  692 			blklen = 1;
  693 		}
  694 
  695 		if (!released || blkaddr != COMPRESS_ADDR)
  696 			nr_free++;
  697 
  698 		continue;
  699 
  700 next:
  701 		if (blklen)
  702 			f2fs_invalidate_blocks(sbi, blkstart, blklen);
  703 
  704 		blkstart = le32_to_cpu(*(addr + 1));
  705 		blklen = 0;
  706 	}
  707 
  708 	if (blklen)
  709 		f2fs_invalidate_blocks(sbi, blkstart, blklen);
  710 
  711 	if (compressed_cluster)
  712 		f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false);
  713 
  714 	if (nr_free) {
  715 		pgoff_t fofs;
  716 		/*
  717 		 * once we invalidate valid blkaddr in range [ofs, ofs + count],
  718 		 * we will invalidate all blkaddr in the whole range.
  719 		 */
  720 		fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_folio),
  721 							dn->inode) + ofs;
  722 		f2fs_update_read_extent_cache_range(dn, fofs, 0, len);
  723 		f2fs_update_age_extent_cache_range(dn, fofs, len);
  724 		dec_valid_block_count(sbi, dn->inode, nr_free);
  725 	}
  726 	dn->ofs_in_node = ofs;
  727 
  728 	f2fs_update_time(sbi, REQ_TIME);
  729 	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
  730 					 dn->ofs_in_node, nr_free);
  731 }
  732 
  733 static int truncate_partial_data_page(struct inode *inode, u64 from,
  734 								bool cache_only)
  735 {
  736 	loff_t offset = from & (PAGE_SIZE - 1);
  737 	pgoff_t index = from >> PAGE_SHIFT;
  738 	struct address_space *mapping = inode->i_mapping;
  739 	struct folio *folio;
  740 
  741 	if (!offset && !cache_only)
  742 		return 0;
  743 
  744 	if (cache_only) {
  745 		folio = filemap_lock_folio(mapping, index);
  746 		if (IS_ERR(folio))
  747 		       return 0;
  748 		if (folio_test_uptodate(folio))
  749 			goto truncate_out;
  750 		f2fs_folio_put(folio, true);
  751 		return 0;
  752 	}
  753 
  754 	folio = f2fs_get_lock_data_folio(inode, index, true);
  755 	if (IS_ERR(folio))
  756 		return PTR_ERR(folio) == -ENOENT ? 0 : PTR_ERR(folio);
  757 truncate_out:
  758 	f2fs_folio_wait_writeback(folio, DATA, true, true);
  759 	folio_zero_segment(folio, offset, folio_size(folio));
  760 
  761 	/* An encrypted inode should have a key and truncate the last page. */
  762 	f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
  763 	if (!cache_only)
  764 		folio_mark_dirty(folio);
  765 	f2fs_folio_put(folio, true);
  766 	return 0;
  767 }
  768 
  769 int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
  770 {
  771 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
  772 	struct dnode_of_data dn;
  773 	pgoff_t free_from;
  774 	int count = 0, err = 0;
  775 	struct folio *ifolio;
  776 	bool truncate_page = false;
  777 
  778 	trace_f2fs_truncate_blocks_enter(inode, from);
  779 
  780 	if (IS_DEVICE_ALIASING(inode) && from) {
  781 		err = -EINVAL;
  782 		goto out_err;
  783 	}
  784 
  785 	free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
  786 
  787 	if (free_from >= max_file_blocks(inode))
  788 		goto free_partial;
  789 
  790 	if (lock)
  791 		f2fs_lock_op(sbi);
  792 
  793 	ifolio = f2fs_get_inode_folio(sbi, inode->i_ino);
  794 	if (IS_ERR(ifolio)) {
  795 		err = PTR_ERR(ifolio);
  796 		goto out;
  797 	}
  798 
  799 	if (IS_DEVICE_ALIASING(inode)) {
  800 		struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];
  801 		struct extent_info ei = et->largest;
  802 
  803 		f2fs_invalidate_blocks(sbi, ei.blk, ei.len);
  804 
  805 		dec_valid_block_count(sbi, inode, ei.len);
  806 		f2fs_update_time(sbi, REQ_TIME);
  807 
  808 		f2fs_folio_put(ifolio, true);
  809 		goto out;
  810 	}
  811 
  812 	if (f2fs_has_inline_data(inode)) {
  813 		f2fs_truncate_inline_inode(inode, ifolio, from);
  814 		f2fs_folio_put(ifolio, true);
  815 		truncate_page = true;
  816 		goto out;
  817 	}
  818 
  819 	set_new_dnode(&dn, inode, ifolio, NULL, 0);
  820 	err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
  821 	if (err) {
  822 		if (err == -ENOENT)
  823 			goto free_next;
  824 		goto out;
  825 	}
  826 
  827 	count = ADDRS_PER_PAGE(dn.node_folio, inode);
  828 
  829 	count -= dn.ofs_in_node;
  830 	f2fs_bug_on(sbi, count < 0);
  831 
  832 	if (dn.ofs_in_node || IS_INODE(dn.node_folio)) {
  833 		f2fs_truncate_data_blocks_range(&dn, count);
  834 		free_from += count;
  835 	}
  836 
  837 	f2fs_put_dnode(&dn);
  838 free_next:
  839 	err = f2fs_truncate_inode_blocks(inode, free_from);
  840 out:
  841 	if (lock)
  842 		f2fs_unlock_op(sbi);
  843 free_partial:
  844 	/* lastly zero out the first data page */
  845 	if (!err)
  846 		err = truncate_partial_data_page(inode, from, truncate_page);
  847 out_err:
  848 	trace_f2fs_truncate_blocks_exit(inode, err);
  849 	return err;
  850 }
  851 
  852 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
  853 {
  854 	u64 free_from = from;
  855 	int err;
  856 
  857 #ifdef CONFIG_F2FS_FS_COMPRESSION
  858 	/*
  859 	 * for compressed file, only support cluster size
  860 	 * aligned truncation.
  861 	 */
  862 	if (f2fs_compressed_file(inode))
  863 		free_from = round_up(from,
  864 				F2FS_I(inode)->i_cluster_size << PAGE_SHIFT);
  865 #endif
  866 
  867 	err = f2fs_do_truncate_blocks(inode, free_from, lock);
  868 	if (err)
  869 		return err;
  870 
  871 #ifdef CONFIG_F2FS_FS_COMPRESSION
  872 	/*
  873 	 * For compressed file, after release compress blocks, don't allow write
  874 	 * direct, but we should allow write direct after truncate to zero.
  875 	 */
  876 	if (f2fs_compressed_file(inode) && !free_from
  877 			&& is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
  878 		clear_inode_flag(inode, FI_COMPRESS_RELEASED);
  879 
  880 	if (from != free_from) {
  881 		err = f2fs_truncate_partial_cluster(inode, from, lock);
  882 		if (err)
  883 			return err;
  884 	}
  885 #endif
  886 
  887 	return 0;
  888 }
  889 
  890 int f2fs_truncate(struct inode *inode)
  891 {
  892 	int err;
  893 
  894 	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
  895 		return -EIO;
  896 
  897 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
  898 				S_ISLNK(inode->i_mode)))
  899 		return 0;
  900 
  901 	trace_f2fs_truncate(inode);
  902 
  903 	if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE))
  904 		return -EIO;
  905 
  906 	err = f2fs_dquot_initialize(inode);
  907 	if (err)
  908 		return err;
  909 
  910 	/* we should check inline_data size */
  911 	if (!f2fs_may_inline_data(inode)) {
  912 		err = f2fs_convert_inline_inode(inode);
  913 		if (err) {
  914 			/*
  915 			 * Always truncate page #0 to avoid page cache
  916 			 * leak in evict() path.
  917 			 */
  918 			truncate_inode_pages_range(inode->i_mapping,
  919 					F2FS_BLK_TO_BYTES(0),
  920 					F2FS_BLK_END_BYTES(0));
  921 			return err;
  922 		}
  923 	}
  924 
  925 	err = f2fs_truncate_blocks(inode, i_size_read(inode), true);
  926 	if (err)
  927 		return err;
  928 
  929 	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
  930 	f2fs_mark_inode_dirty_sync(inode, false);
  931 	return 0;
  932 }
  933 
  934 static bool f2fs_force_buffered_io(struct inode *inode, int rw)
  935 {
  936 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
  937 
  938 	if (!fscrypt_dio_supported(inode))
  939 		return true;
  940 	if (fsverity_active(inode))
  941 		return true;
  942 	if (f2fs_compressed_file(inode))
  943 		return true;
  944 	/*
  945 	 * only force direct read to use buffered IO, for direct write,
  946 	 * it expects inline data conversion before committing IO.
  947 	 */
  948 	if (f2fs_has_inline_data(inode) && rw == READ)
  949 		return true;
  950 
  951 	/* disallow direct IO if any of devices has unaligned blksize */
  952 	if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize)
  953 		return true;
  954 	/*
  955 	 * for blkzoned device, fallback direct IO to buffered IO, so
  956 	 * all IOs can be serialized by log-structured write.
  957 	 */
  958 	if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE) &&
  959 	    !f2fs_is_pinned_file(inode))
  960 		return true;
  961 	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
  962 		return true;
  963 
  964 	return false;
  965 }
  966 
  967 int f2fs_getattr(struct mnt_idmap *idmap, const struct path *path,
  968 		 struct kstat *stat, u32 request_mask, unsigned int query_flags)
  969 {
  970 	struct inode *inode = d_inode(path->dentry);
  971 	struct f2fs_inode_info *fi = F2FS_I(inode);
  972 	struct f2fs_inode *ri = NULL;
  973 	unsigned int flags;
  974 
  975 	if (f2fs_has_extra_attr(inode) &&
  976 			f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&
  977 			F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
  978 		stat->result_mask |= STATX_BTIME;
  979 		stat->btime.tv_sec = fi->i_crtime.tv_sec;
  980 		stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
  981 	}
  982 
  983 	/*
  984 	 * Return the DIO alignment restrictions if requested.  We only return
  985 	 * this information when requested, since on encrypted files it might
  986 	 * take a fair bit of work to get if the file wasn't opened recently.
  987 	 *
  988 	 * f2fs sometimes supports DIO reads but not DIO writes.  STATX_DIOALIGN
  989 	 * cannot represent that, so in that case we report no DIO support.
  990 	 */
  991 	if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) {
  992 		unsigned int bsize = i_blocksize(inode);
  993 
  994 		stat->result_mask |= STATX_DIOALIGN;
  995 		if (!f2fs_force_buffered_io(inode, WRITE)) {
  996 			stat->dio_mem_align = bsize;
  997 			stat->dio_offset_align = bsize;
  998 		}
  999 	}
 1000 
 1001 	flags = fi->i_flags;
 1002 	if (flags & F2FS_COMPR_FL)
 1003 		stat->attributes |= STATX_ATTR_COMPRESSED;
 1004 	if (flags & F2FS_APPEND_FL)
 1005 		stat->attributes |= STATX_ATTR_APPEND;
 1006 	if (IS_ENCRYPTED(inode))
 1007 		stat->attributes |= STATX_ATTR_ENCRYPTED;
 1008 	if (flags & F2FS_IMMUTABLE_FL)
 1009 		stat->attributes |= STATX_ATTR_IMMUTABLE;
 1010 	if (flags & F2FS_NODUMP_FL)
 1011 		stat->attributes |= STATX_ATTR_NODUMP;
 1012 	if (IS_VERITY(inode))
 1013 		stat->attributes |= STATX_ATTR_VERITY;
 1014 
 1015 	stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
 1016 				  STATX_ATTR_APPEND |
 1017 				  STATX_ATTR_ENCRYPTED |
 1018 				  STATX_ATTR_IMMUTABLE |
 1019 				  STATX_ATTR_NODUMP |
 1020 				  STATX_ATTR_VERITY);
 1021 
 1022 	generic_fillattr(idmap, request_mask, inode, stat);
 1023 
 1024 	/* we need to show initial sectors used for inline_data/dentries */
 1025 	if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
 1026 					f2fs_has_inline_dentry(inode))
 1027 		stat->blocks += (stat->size + 511) >> 9;
 1028 
 1029 	return 0;
 1030 }
 1031 
 1032 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 1033 static void __setattr_copy(struct mnt_idmap *idmap,
 1034 			   struct inode *inode, const struct iattr *attr)
 1035 {
 1036 	unsigned int ia_valid = attr->ia_valid;
 1037 
 1038 	i_uid_update(idmap, attr, inode);
 1039 	i_gid_update(idmap, attr, inode);
 1040 	if (ia_valid & ATTR_ATIME)
 1041 		inode_set_atime_to_ts(inode, attr->ia_atime);
 1042 	if (ia_valid & ATTR_MTIME)
 1043 		inode_set_mtime_to_ts(inode, attr->ia_mtime);
 1044 	if (ia_valid & ATTR_CTIME)
 1045 		inode_set_ctime_to_ts(inode, attr->ia_ctime);
 1046 	if (ia_valid & ATTR_MODE) {
 1047 		umode_t mode = attr->ia_mode;
 1048 
 1049 		if (!in_group_or_capable(idmap, inode, i_gid_into_vfsgid(idmap, inode)))
 1050 			mode &= ~S_ISGID;
 1051 		set_acl_inode(inode, mode);
 1052 	}
 1053 }
 1054 #else
 1055 #define __setattr_copy setattr_copy
 1056 #endif
 1057 
 1058 int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 1059 		 struct iattr *attr)
 1060 {
 1061 	struct inode *inode = d_inode(dentry);
 1062 	struct f2fs_inode_info *fi = F2FS_I(inode);
 1063 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1064 	int err;
 1065 
 1066 	if (unlikely(f2fs_cp_error(sbi)))
 1067 		return -EIO;
 1068 
 1069 	err = setattr_prepare(idmap, dentry, attr);
 1070 	if (err)
 1071 		return err;
 1072 
 1073 	err = fscrypt_prepare_setattr(dentry, attr);
 1074 	if (err)
 1075 		return err;
 1076 
 1077 	err = fsverity_prepare_setattr(dentry, attr);
 1078 	if (err)
 1079 		return err;
 1080 
 1081 	if (unlikely(IS_IMMUTABLE(inode)))
 1082 		return -EPERM;
 1083 
 1084 	if (unlikely(IS_APPEND(inode) &&
 1085 			(attr->ia_valid & (ATTR_MODE | ATTR_UID |
 1086 				  ATTR_GID | ATTR_TIMES_SET))))
 1087 		return -EPERM;
 1088 
 1089 	if ((attr->ia_valid & ATTR_SIZE)) {
 1090 		if (!f2fs_is_compress_backend_ready(inode) ||
 1091 				IS_DEVICE_ALIASING(inode))
 1092 			return -EOPNOTSUPP;
 1093 		if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
 1094 			!IS_ALIGNED(attr->ia_size,
 1095 			F2FS_BLK_TO_BYTES(fi->i_cluster_size)))
 1096 			return -EINVAL;
 1097 		/*
 1098 		 * To prevent scattered pin block generation, we don't allow
 1099 		 * smaller/equal size unaligned truncation for pinned file.
 1100 		 * We only support overwrite IO to pinned file, so don't
 1101 		 * care about larger size truncation.
 1102 		 */
 1103 		if (f2fs_is_pinned_file(inode) &&
 1104 			attr->ia_size <= i_size_read(inode) &&
 1105 			!IS_ALIGNED(attr->ia_size,
 1106 			F2FS_BLK_TO_BYTES(CAP_BLKS_PER_SEC(sbi))))
 1107 			return -EINVAL;
 1108 	}
 1109 
 1110 	if (is_quota_modification(idmap, inode, attr)) {
 1111 		err = f2fs_dquot_initialize(inode);
 1112 		if (err)
 1113 			return err;
 1114 	}
 1115 	if (i_uid_needs_update(idmap, attr, inode) ||
 1116 	    i_gid_needs_update(idmap, attr, inode)) {
 1117 		f2fs_lock_op(sbi);
 1118 		err = dquot_transfer(idmap, inode, attr);
 1119 		if (err) {
 1120 			set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
 1121 			f2fs_unlock_op(sbi);
 1122 			return err;
 1123 		}
 1124 		/*
 1125 		 * update uid/gid under lock_op(), so that dquot and inode can
 1126 		 * be updated atomically.
 1127 		 */
 1128 		i_uid_update(idmap, attr, inode);
 1129 		i_gid_update(idmap, attr, inode);
 1130 		f2fs_mark_inode_dirty_sync(inode, true);
 1131 		f2fs_unlock_op(sbi);
 1132 	}
 1133 
 1134 	if (attr->ia_valid & ATTR_SIZE) {
 1135 		loff_t old_size = i_size_read(inode);
 1136 
 1137 		if (attr->ia_size > MAX_INLINE_DATA(inode)) {
 1138 			/*
 1139 			 * should convert inline inode before i_size_write to
 1140 			 * keep smaller than inline_data size with inline flag.
 1141 			 */
 1142 			err = f2fs_convert_inline_inode(inode);
 1143 			if (err)
 1144 				return err;
 1145 		}
 1146 
 1147 		/*
 1148 		 * wait for inflight dio, blocks should be removed after
 1149 		 * IO completion.
 1150 		 */
 1151 		if (attr->ia_size < old_size)
 1152 			inode_dio_wait(inode);
 1153 
 1154 		f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 1155 		filemap_invalidate_lock(inode->i_mapping);
 1156 
 1157 		if (attr->ia_size > old_size)
 1158 			f2fs_zero_post_eof_page(inode, attr->ia_size, false);
 1159 		truncate_setsize(inode, attr->ia_size);
 1160 
 1161 		if (attr->ia_size <= old_size)
 1162 			err = f2fs_truncate(inode);
 1163 		/*
 1164 		 * do not trim all blocks after i_size if target size is
 1165 		 * larger than i_size.
 1166 		 */
 1167 		filemap_invalidate_unlock(inode->i_mapping);
 1168 		f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
 1169 		if (err)
 1170 			return err;
 1171 
 1172 		spin_lock(&fi->i_size_lock);
 1173 		inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 1174 		fi->last_disk_size = i_size_read(inode);
 1175 		spin_unlock(&fi->i_size_lock);
 1176 	}
 1177 
 1178 	__setattr_copy(idmap, inode, attr);
 1179 
 1180 	if (attr->ia_valid & ATTR_MODE) {
 1181 		err = posix_acl_chmod(idmap, dentry, f2fs_get_inode_mode(inode));
 1182 
 1183 		if (is_inode_flag_set(inode, FI_ACL_MODE)) {
 1184 			if (!err)
 1185 				inode->i_mode = fi->i_acl_mode;
 1186 			clear_inode_flag(inode, FI_ACL_MODE);
 1187 		}
 1188 	}
 1189 
 1190 	/* file size may changed here */
 1191 	f2fs_mark_inode_dirty_sync(inode, true);
 1192 
 1193 	/* inode change will produce dirty node pages flushed by checkpoint */
 1194 	f2fs_balance_fs(sbi, true);
 1195 
 1196 	return err;
 1197 }
 1198 
 1199 const struct inode_operations f2fs_file_inode_operations = {
 1200 	.getattr	= f2fs_getattr,
 1201 	.setattr	= f2fs_setattr,
 1202 	.get_inode_acl	= f2fs_get_acl,
 1203 	.set_acl	= f2fs_set_acl,
 1204 	.listxattr	= f2fs_listxattr,
 1205 	.fiemap		= f2fs_fiemap,
 1206 	.fileattr_get	= f2fs_fileattr_get,
 1207 	.fileattr_set	= f2fs_fileattr_set,
 1208 };
 1209 
 1210 static int fill_zero(struct inode *inode, pgoff_t index,
 1211 					loff_t start, loff_t len)
 1212 {
 1213 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1214 	struct folio *folio;
 1215 
 1216 	if (!len)
 1217 		return 0;
 1218 
 1219 	f2fs_balance_fs(sbi, true);
 1220 
 1221 	f2fs_lock_op(sbi);
 1222 	folio = f2fs_get_new_data_folio(inode, NULL, index, false);
 1223 	f2fs_unlock_op(sbi);
 1224 
 1225 	if (IS_ERR(folio))
 1226 		return PTR_ERR(folio);
 1227 
 1228 	f2fs_folio_wait_writeback(folio, DATA, true, true);
 1229 	folio_zero_range(folio, start, len);
 1230 	folio_mark_dirty(folio);
 1231 	f2fs_folio_put(folio, true);
 1232 	return 0;
 1233 }
 1234 
 1235 int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
 1236 {
 1237 	int err;
 1238 
 1239 	while (pg_start < pg_end) {
 1240 		struct dnode_of_data dn;
 1241 		pgoff_t end_offset, count;
 1242 
 1243 		set_new_dnode(&dn, inode, NULL, NULL, 0);
 1244 		err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
 1245 		if (err) {
 1246 			if (err == -ENOENT) {
 1247 				pg_start = f2fs_get_next_page_offset(&dn,
 1248 								pg_start);
 1249 				continue;
 1250 			}
 1251 			return err;
 1252 		}
 1253 
 1254 		end_offset = ADDRS_PER_PAGE(dn.node_folio, inode);
 1255 		count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
 1256 
 1257 		f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
 1258 
 1259 		f2fs_truncate_data_blocks_range(&dn, count);
 1260 		f2fs_put_dnode(&dn);
 1261 
 1262 		pg_start += count;
 1263 	}
 1264 	return 0;
 1265 }
 1266 
 1267 static int f2fs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 1268 {
 1269 	pgoff_t pg_start, pg_end;
 1270 	loff_t off_start, off_end;
 1271 	int ret;
 1272 
 1273 	ret = f2fs_convert_inline_inode(inode);
 1274 	if (ret)
 1275 		return ret;
 1276 
 1277 	f2fs_zero_post_eof_page(inode, offset + len, true);
 1278 
 1279 	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
 1280 	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
 1281 
 1282 	off_start = offset & (PAGE_SIZE - 1);
 1283 	off_end = (offset + len) & (PAGE_SIZE - 1);
 1284 
 1285 	if (pg_start == pg_end) {
 1286 		ret = fill_zero(inode, pg_start, off_start,
 1287 						off_end - off_start);
 1288 		if (ret)
 1289 			return ret;
 1290 	} else {
 1291 		if (off_start) {
 1292 			ret = fill_zero(inode, pg_start++, off_start,
 1293 						PAGE_SIZE - off_start);
 1294 			if (ret)
 1295 				return ret;
 1296 		}
 1297 		if (off_end) {
 1298 			ret = fill_zero(inode, pg_end, 0, off_end);
 1299 			if (ret)
 1300 				return ret;
 1301 		}
 1302 
 1303 		if (pg_start < pg_end) {
 1304 			loff_t blk_start, blk_end;
 1305 			struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1306 
 1307 			f2fs_balance_fs(sbi, true);
 1308 
 1309 			blk_start = (loff_t)pg_start << PAGE_SHIFT;
 1310 			blk_end = (loff_t)pg_end << PAGE_SHIFT;
 1311 
 1312 			f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1313 			filemap_invalidate_lock(inode->i_mapping);
 1314 
 1315 			truncate_pagecache_range(inode, blk_start, blk_end - 1);
 1316 
 1317 			f2fs_lock_op(sbi);
 1318 			ret = f2fs_truncate_hole(inode, pg_start, pg_end);
 1319 			f2fs_unlock_op(sbi);
 1320 
 1321 			filemap_invalidate_unlock(inode->i_mapping);
 1322 			f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1323 		}
 1324 	}
 1325 
 1326 	return ret;
 1327 }
 1328 
 1329 static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
 1330 				int *do_replace, pgoff_t off, pgoff_t len)
 1331 {
 1332 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1333 	struct dnode_of_data dn;
 1334 	int ret, done, i;
 1335 
 1336 next_dnode:
 1337 	set_new_dnode(&dn, inode, NULL, NULL, 0);
 1338 	ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
 1339 	if (ret && ret != -ENOENT) {
 1340 		return ret;
 1341 	} else if (ret == -ENOENT) {
 1342 		if (dn.max_level == 0)
 1343 			return -ENOENT;
 1344 		done = min((pgoff_t)ADDRS_PER_BLOCK(inode) -
 1345 						dn.ofs_in_node, len);
 1346 		blkaddr += done;
 1347 		do_replace += done;
 1348 		goto next;
 1349 	}
 1350 
 1351 	done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_folio, inode) -
 1352 							dn.ofs_in_node, len);
 1353 	for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
 1354 		*blkaddr = f2fs_data_blkaddr(&dn);
 1355 
 1356 		if (__is_valid_data_blkaddr(*blkaddr) &&
 1357 			!f2fs_is_valid_blkaddr(sbi, *blkaddr,
 1358 					DATA_GENERIC_ENHANCE)) {
 1359 			f2fs_put_dnode(&dn);
 1360 			return -EFSCORRUPTED;
 1361 		}
 1362 
 1363 		if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
 1364 
 1365 			if (f2fs_lfs_mode(sbi)) {
 1366 				f2fs_put_dnode(&dn);
 1367 				return -EOPNOTSUPP;
 1368 			}
 1369 
 1370 			/* do not invalidate this block address */
 1371 			f2fs_update_data_blkaddr(&dn, NULL_ADDR);
 1372 			*do_replace = 1;
 1373 		}
 1374 	}
 1375 	f2fs_put_dnode(&dn);
 1376 next:
 1377 	len -= done;
 1378 	off += done;
 1379 	if (len)
 1380 		goto next_dnode;
 1381 	return 0;
 1382 }
 1383 
 1384 static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
 1385 				int *do_replace, pgoff_t off, int len)
 1386 {
 1387 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1388 	struct dnode_of_data dn;
 1389 	int ret, i;
 1390 
 1391 	for (i = 0; i < len; i++, do_replace++, blkaddr++) {
 1392 		if (*do_replace == 0)
 1393 			continue;
 1394 
 1395 		set_new_dnode(&dn, inode, NULL, NULL, 0);
 1396 		ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
 1397 		if (ret) {
 1398 			dec_valid_block_count(sbi, inode, 1);
 1399 			f2fs_invalidate_blocks(sbi, *blkaddr, 1);
 1400 		} else {
 1401 			f2fs_update_data_blkaddr(&dn, *blkaddr);
 1402 		}
 1403 		f2fs_put_dnode(&dn);
 1404 	}
 1405 	return 0;
 1406 }
 1407 
 1408 static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
 1409 			block_t *blkaddr, int *do_replace,
 1410 			pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
 1411 {
 1412 	struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
 1413 	pgoff_t i = 0;
 1414 	int ret;
 1415 
 1416 	while (i < len) {
 1417 		if (blkaddr[i] == NULL_ADDR && !full) {
 1418 			i++;
 1419 			continue;
 1420 		}
 1421 
 1422 		if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
 1423 			struct dnode_of_data dn;
 1424 			struct node_info ni;
 1425 			size_t new_size;
 1426 			pgoff_t ilen;
 1427 
 1428 			set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
 1429 			ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
 1430 			if (ret)
 1431 				return ret;
 1432 
 1433 			ret = f2fs_get_node_info(sbi, dn.nid, &ni, false);
 1434 			if (ret) {
 1435 				f2fs_put_dnode(&dn);
 1436 				return ret;
 1437 			}
 1438 
 1439 			ilen = min((pgoff_t)
 1440 				ADDRS_PER_PAGE(dn.node_folio, dst_inode) -
 1441 						dn.ofs_in_node, len - i);
 1442 			do {
 1443 				dn.data_blkaddr = f2fs_data_blkaddr(&dn);
 1444 				f2fs_truncate_data_blocks_range(&dn, 1);
 1445 
 1446 				if (do_replace[i]) {
 1447 					f2fs_i_blocks_write(src_inode,
 1448 							1, false, false);
 1449 					f2fs_i_blocks_write(dst_inode,
 1450 							1, true, false);
 1451 					f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
 1452 					blkaddr[i], ni.version, true, false);
 1453 
 1454 					do_replace[i] = 0;
 1455 				}
 1456 				dn.ofs_in_node++;
 1457 				i++;
 1458 				new_size = (loff_t)(dst + i) << PAGE_SHIFT;
 1459 				if (dst_inode->i_size < new_size)
 1460 					f2fs_i_size_write(dst_inode, new_size);
 1461 			} while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
 1462 
 1463 			f2fs_put_dnode(&dn);
 1464 		} else {
 1465 			struct folio *fsrc, *fdst;
 1466 
 1467 			fsrc = f2fs_get_lock_data_folio(src_inode,
 1468 							src + i, true);
 1469 			if (IS_ERR(fsrc))
 1470 				return PTR_ERR(fsrc);
 1471 			fdst = f2fs_get_new_data_folio(dst_inode, NULL, dst + i,
 1472 								true);
 1473 			if (IS_ERR(fdst)) {
 1474 				f2fs_folio_put(fsrc, true);
 1475 				return PTR_ERR(fdst);
 1476 			}
 1477 
 1478 			f2fs_folio_wait_writeback(fdst, DATA, true, true);
 1479 
 1480 			memcpy_folio(fdst, 0, fsrc, 0, PAGE_SIZE);
 1481 			folio_mark_dirty(fdst);
 1482 			folio_set_f2fs_gcing(fdst);
 1483 			f2fs_folio_put(fdst, true);
 1484 			f2fs_folio_put(fsrc, true);
 1485 
 1486 			ret = f2fs_truncate_hole(src_inode,
 1487 						src + i, src + i + 1);
 1488 			if (ret)
 1489 				return ret;
 1490 			i++;
 1491 		}
 1492 	}
 1493 	return 0;
 1494 }
 1495 
 1496 static int __exchange_data_block(struct inode *src_inode,
 1497 			struct inode *dst_inode, pgoff_t src, pgoff_t dst,
 1498 			pgoff_t len, bool full)
 1499 {
 1500 	block_t *src_blkaddr;
 1501 	int *do_replace;
 1502 	pgoff_t olen;
 1503 	int ret;
 1504 
 1505 	while (len) {
 1506 		olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);
 1507 
 1508 		src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
 1509 					array_size(olen, sizeof(block_t)),
 1510 					GFP_NOFS);
 1511 		if (!src_blkaddr)
 1512 			return -ENOMEM;
 1513 
 1514 		do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
 1515 					array_size(olen, sizeof(int)),
 1516 					GFP_NOFS);
 1517 		if (!do_replace) {
 1518 			kvfree(src_blkaddr);
 1519 			return -ENOMEM;
 1520 		}
 1521 
 1522 		ret = __read_out_blkaddrs(src_inode, src_blkaddr,
 1523 					do_replace, src, olen);
 1524 		if (ret)
 1525 			goto roll_back;
 1526 
 1527 		ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
 1528 					do_replace, src, dst, olen, full);
 1529 		if (ret)
 1530 			goto roll_back;
 1531 
 1532 		src += olen;
 1533 		dst += olen;
 1534 		len -= olen;
 1535 
 1536 		kvfree(src_blkaddr);
 1537 		kvfree(do_replace);
 1538 	}
 1539 	return 0;
 1540 
 1541 roll_back:
 1542 	__roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);
 1543 	kvfree(src_blkaddr);
 1544 	kvfree(do_replace);
 1545 	return ret;
 1546 }
 1547 
 1548 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
 1549 {
 1550 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1551 	pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 1552 	pgoff_t start = offset >> PAGE_SHIFT;
 1553 	pgoff_t end = (offset + len) >> PAGE_SHIFT;
 1554 	int ret;
 1555 
 1556 	f2fs_balance_fs(sbi, true);
 1557 
 1558 	/* avoid gc operation during block exchange */
 1559 	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1560 	filemap_invalidate_lock(inode->i_mapping);
 1561 
 1562 	f2fs_zero_post_eof_page(inode, offset + len, false);
 1563 
 1564 	f2fs_lock_op(sbi);
 1565 	f2fs_drop_extent_tree(inode);
 1566 	truncate_pagecache(inode, offset);
 1567 	ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
 1568 	f2fs_unlock_op(sbi);
 1569 
 1570 	filemap_invalidate_unlock(inode->i_mapping);
 1571 	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1572 	return ret;
 1573 }
 1574 
 1575 static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
 1576 {
 1577 	loff_t new_size;
 1578 	int ret;
 1579 
 1580 	if (offset + len >= i_size_read(inode))
 1581 		return -EINVAL;
 1582 
 1583 	/* collapse range should be aligned to block size of f2fs. */
 1584 	if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
 1585 		return -EINVAL;
 1586 
 1587 	ret = f2fs_convert_inline_inode(inode);
 1588 	if (ret)
 1589 		return ret;
 1590 
 1591 	/* write out all dirty pages from offset */
 1592 	ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
 1593 	if (ret)
 1594 		return ret;
 1595 
 1596 	ret = f2fs_do_collapse(inode, offset, len);
 1597 	if (ret)
 1598 		return ret;
 1599 
 1600 	/* write out all moved pages, if possible */
 1601 	filemap_invalidate_lock(inode->i_mapping);
 1602 	filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
 1603 	truncate_pagecache(inode, offset);
 1604 
 1605 	new_size = i_size_read(inode) - len;
 1606 	ret = f2fs_truncate_blocks(inode, new_size, true);
 1607 	filemap_invalidate_unlock(inode->i_mapping);
 1608 	if (!ret)
 1609 		f2fs_i_size_write(inode, new_size);
 1610 	return ret;
 1611 }
 1612 
 1613 static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
 1614 								pgoff_t end)
 1615 {
 1616 	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
 1617 	pgoff_t index = start;
 1618 	unsigned int ofs_in_node = dn->ofs_in_node;
 1619 	blkcnt_t count = 0;
 1620 	int ret;
 1621 
 1622 	for (; index < end; index++, dn->ofs_in_node++) {
 1623 		if (f2fs_data_blkaddr(dn) == NULL_ADDR)
 1624 			count++;
 1625 	}
 1626 
 1627 	dn->ofs_in_node = ofs_in_node;
 1628 	ret = f2fs_reserve_new_blocks(dn, count);
 1629 	if (ret)
 1630 		return ret;
 1631 
 1632 	dn->ofs_in_node = ofs_in_node;
 1633 	for (index = start; index < end; index++, dn->ofs_in_node++) {
 1634 		dn->data_blkaddr = f2fs_data_blkaddr(dn);
 1635 		/*
 1636 		 * f2fs_reserve_new_blocks will not guarantee entire block
 1637 		 * allocation.
 1638 		 */
 1639 		if (dn->data_blkaddr == NULL_ADDR) {
 1640 			ret = -ENOSPC;
 1641 			break;
 1642 		}
 1643 
 1644 		if (dn->data_blkaddr == NEW_ADDR)
 1645 			continue;
 1646 
 1647 		if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr,
 1648 					DATA_GENERIC_ENHANCE)) {
 1649 			ret = -EFSCORRUPTED;
 1650 			break;
 1651 		}
 1652 
 1653 		f2fs_invalidate_blocks(sbi, dn->data_blkaddr, 1);
 1654 		f2fs_set_data_blkaddr(dn, NEW_ADDR);
 1655 	}
 1656 
 1657 	if (index > start) {
 1658 		f2fs_update_read_extent_cache_range(dn, start, 0,
 1659 							index - start);
 1660 		f2fs_update_age_extent_cache_range(dn, start, index - start);
 1661 	}
 1662 
 1663 	return ret;
 1664 }
 1665 
 1666 static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
 1667 								int mode)
 1668 {
 1669 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1670 	struct address_space *mapping = inode->i_mapping;
 1671 	pgoff_t index, pg_start, pg_end;
 1672 	loff_t new_size = i_size_read(inode);
 1673 	loff_t off_start, off_end;
 1674 	int ret = 0;
 1675 
 1676 	ret = inode_newsize_ok(inode, (len + offset));
 1677 	if (ret)
 1678 		return ret;
 1679 
 1680 	ret = f2fs_convert_inline_inode(inode);
 1681 	if (ret)
 1682 		return ret;
 1683 
 1684 	ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
 1685 	if (ret)
 1686 		return ret;
 1687 
 1688 	f2fs_zero_post_eof_page(inode, offset + len, true);
 1689 
 1690 	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
 1691 	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
 1692 
 1693 	off_start = offset & (PAGE_SIZE - 1);
 1694 	off_end = (offset + len) & (PAGE_SIZE - 1);
 1695 
 1696 	if (pg_start == pg_end) {
 1697 		ret = fill_zero(inode, pg_start, off_start,
 1698 						off_end - off_start);
 1699 		if (ret)
 1700 			return ret;
 1701 
 1702 		new_size = max_t(loff_t, new_size, offset + len);
 1703 	} else {
 1704 		if (off_start) {
 1705 			ret = fill_zero(inode, pg_start++, off_start,
 1706 						PAGE_SIZE - off_start);
 1707 			if (ret)
 1708 				return ret;
 1709 
 1710 			new_size = max_t(loff_t, new_size,
 1711 					(loff_t)pg_start << PAGE_SHIFT);
 1712 		}
 1713 
 1714 		for (index = pg_start; index < pg_end;) {
 1715 			struct dnode_of_data dn;
 1716 			unsigned int end_offset;
 1717 			pgoff_t end;
 1718 
 1719 			f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1720 			filemap_invalidate_lock(mapping);
 1721 
 1722 			truncate_pagecache_range(inode,
 1723 				(loff_t)index << PAGE_SHIFT,
 1724 				((loff_t)pg_end << PAGE_SHIFT) - 1);
 1725 
 1726 			f2fs_lock_op(sbi);
 1727 
 1728 			set_new_dnode(&dn, inode, NULL, NULL, 0);
 1729 			ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
 1730 			if (ret) {
 1731 				f2fs_unlock_op(sbi);
 1732 				filemap_invalidate_unlock(mapping);
 1733 				f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1734 				goto out;
 1735 			}
 1736 
 1737 			end_offset = ADDRS_PER_PAGE(dn.node_folio, inode);
 1738 			end = min(pg_end, end_offset - dn.ofs_in_node + index);
 1739 
 1740 			ret = f2fs_do_zero_range(&dn, index, end);
 1741 			f2fs_put_dnode(&dn);
 1742 
 1743 			f2fs_unlock_op(sbi);
 1744 			filemap_invalidate_unlock(mapping);
 1745 			f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1746 
 1747 			f2fs_balance_fs(sbi, dn.node_changed);
 1748 
 1749 			if (ret)
 1750 				goto out;
 1751 
 1752 			index = end;
 1753 			new_size = max_t(loff_t, new_size,
 1754 					(loff_t)index << PAGE_SHIFT);
 1755 		}
 1756 
 1757 		if (off_end) {
 1758 			ret = fill_zero(inode, pg_end, 0, off_end);
 1759 			if (ret)
 1760 				goto out;
 1761 
 1762 			new_size = max_t(loff_t, new_size, offset + len);
 1763 		}
 1764 	}
 1765 
 1766 out:
 1767 	if (new_size > i_size_read(inode)) {
 1768 		if (mode & FALLOC_FL_KEEP_SIZE)
 1769 			file_set_keep_isize(inode);
 1770 		else
 1771 			f2fs_i_size_write(inode, new_size);
 1772 	}
 1773 	return ret;
 1774 }
 1775 
 1776 static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
 1777 {
 1778 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1779 	struct address_space *mapping = inode->i_mapping;
 1780 	pgoff_t nr, pg_start, pg_end, delta, idx;
 1781 	loff_t new_size;
 1782 	int ret = 0;
 1783 
 1784 	new_size = i_size_read(inode) + len;
 1785 	ret = inode_newsize_ok(inode, new_size);
 1786 	if (ret)
 1787 		return ret;
 1788 
 1789 	if (offset >= i_size_read(inode))
 1790 		return -EINVAL;
 1791 
 1792 	/* insert range should be aligned to block size of f2fs. */
 1793 	if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
 1794 		return -EINVAL;
 1795 
 1796 	ret = f2fs_convert_inline_inode(inode);
 1797 	if (ret)
 1798 		return ret;
 1799 
 1800 	f2fs_balance_fs(sbi, true);
 1801 
 1802 	filemap_invalidate_lock(mapping);
 1803 	ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);
 1804 	filemap_invalidate_unlock(mapping);
 1805 	if (ret)
 1806 		return ret;
 1807 
 1808 	/* write out all dirty pages from offset */
 1809 	ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);
 1810 	if (ret)
 1811 		return ret;
 1812 
 1813 	pg_start = offset >> PAGE_SHIFT;
 1814 	pg_end = (offset + len) >> PAGE_SHIFT;
 1815 	delta = pg_end - pg_start;
 1816 	idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 1817 
 1818 	/* avoid gc operation during block exchange */
 1819 	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1820 	filemap_invalidate_lock(mapping);
 1821 
 1822 	f2fs_zero_post_eof_page(inode, offset + len, false);
 1823 	truncate_pagecache(inode, offset);
 1824 
 1825 	while (!ret && idx > pg_start) {
 1826 		nr = idx - pg_start;
 1827 		if (nr > delta)
 1828 			nr = delta;
 1829 		idx -= nr;
 1830 
 1831 		f2fs_lock_op(sbi);
 1832 		f2fs_drop_extent_tree(inode);
 1833 
 1834 		ret = __exchange_data_block(inode, inode, idx,
 1835 					idx + delta, nr, false);
 1836 		f2fs_unlock_op(sbi);
 1837 	}
 1838 	filemap_invalidate_unlock(mapping);
 1839 	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 1840 	if (ret)
 1841 		return ret;
 1842 
 1843 	/* write out all moved pages, if possible */
 1844 	filemap_invalidate_lock(mapping);
 1845 	ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);
 1846 	truncate_pagecache(inode, offset);
 1847 	filemap_invalidate_unlock(mapping);
 1848 
 1849 	if (!ret)
 1850 		f2fs_i_size_write(inode, new_size);
 1851 	return ret;
 1852 }
 1853 
 1854 static int f2fs_expand_inode_data(struct inode *inode, loff_t offset,
 1855 					loff_t len, int mode)
 1856 {
 1857 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 1858 	struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
 1859 			.m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE,
 1860 			.m_may_create = true };
 1861 	struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,
 1862 			.init_gc_type = FG_GC,
 1863 			.should_migrate_blocks = false,
 1864 			.err_gc_skipped = true,
 1865 			.nr_free_secs = 0 };
 1866 	pgoff_t pg_start, pg_end;
 1867 	loff_t new_size;
 1868 	loff_t off_end;
 1869 	block_t expanded = 0;
 1870 	int err;
 1871 
 1872 	err = inode_newsize_ok(inode, (len + offset));
 1873 	if (err)
 1874 		return err;
 1875 
 1876 	err = f2fs_convert_inline_inode(inode);
 1877 	if (err)
 1878 		return err;
 1879 
 1880 	f2fs_zero_post_eof_page(inode, offset + len, true);
 1881 
 1882 	f2fs_balance_fs(sbi, true);
 1883 
 1884 	pg_start = ((unsigned long long)offset) >> PAGE_SHIFT;
 1885 	pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
 1886 	off_end = (offset + len) & (PAGE_SIZE - 1);
 1887 
 1888 	map.m_lblk = pg_start;
 1889 	map.m_len = pg_end - pg_start;
 1890 	if (off_end)
 1891 		map.m_len++;
 1892 
 1893 	if (!map.m_len)
 1894 		return 0;
 1895 
 1896 	if (f2fs_is_pinned_file(inode)) {
 1897 		block_t sec_blks = CAP_BLKS_PER_SEC(sbi);
 1898 		block_t sec_len = roundup(map.m_len, sec_blks);
 1899 
 1900 		map.m_len = sec_blks;
 1901 next_alloc:
 1902 		f2fs_down_write(&sbi->pin_sem);
 1903 
 1904 		if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
 1905 			if (has_not_enough_free_secs(sbi, 0, 0)) {
 1906 				f2fs_up_write(&sbi->pin_sem);
 1907 				err = -ENOSPC;
 1908 				f2fs_warn_ratelimited(sbi,
 1909 					"ino:%lu, start:%lu, end:%lu, need to trigger GC to "
 1910 					"reclaim enough free segment when checkpoint is enabled",
 1911 					inode->i_ino, pg_start, pg_end);
 1912 				goto out_err;
 1913 			}
 1914 		}
 1915 
 1916 		if (has_not_enough_free_secs(sbi, 0,
 1917 				sbi->reserved_pin_section)) {
 1918 			f2fs_down_write(&sbi->gc_lock);
 1919 			stat_inc_gc_call_count(sbi, FOREGROUND);
 1920 			err = f2fs_gc(sbi, &gc_control);
 1921 			if (err && err != -ENODATA) {
 1922 				f2fs_up_write(&sbi->pin_sem);
 1923 				goto out_err;
 1924 			}
 1925 		}
 1926 
 1927 		err = f2fs_allocate_pinning_section(sbi);
 1928 		if (err) {
 1929 			f2fs_up_write(&sbi->pin_sem);
 1930 			goto out_err;
 1931 		}
 1932 
 1933 		map.m_seg_type = CURSEG_COLD_DATA_PINNED;
 1934 		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_DIO);
 1935 		file_dont_truncate(inode);
 1936 
 1937 		f2fs_up_write(&sbi->pin_sem);
 1938 
 1939 		expanded += map.m_len;
 1940 		sec_len -= map.m_len;
 1941 		map.m_lblk += map.m_len;
 1942 		if (!err && sec_len)
 1943 			goto next_alloc;
 1944 
 1945 		map.m_len = expanded;
 1946 	} else {
 1947 		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_AIO);
 1948 		expanded = map.m_len;
 1949 	}
 1950 out_err:
 1951 	if (err) {
 1952 		pgoff_t last_off;
 1953 
 1954 		if (!expanded)
 1955 			return err;
 1956 
 1957 		last_off = pg_start + expanded - 1;
 1958 
 1959 		/* update new size to the failed position */
 1960 		new_size = (last_off == pg_end) ? offset + len :
 1961 					(loff_t)(last_off + 1) << PAGE_SHIFT;
 1962 	} else {
 1963 		new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
 1964 	}
 1965 
 1966 	if (new_size > i_size_read(inode)) {
 1967 		if (mode & FALLOC_FL_KEEP_SIZE)
 1968 			file_set_keep_isize(inode);
 1969 		else
 1970 			f2fs_i_size_write(inode, new_size);
 1971 	}
 1972 
 1973 	return err;
 1974 }
 1975 
 1976 static long f2fs_fallocate(struct file *file, int mode,
 1977 				loff_t offset, loff_t len)
 1978 {
 1979 	struct inode *inode = file_inode(file);
 1980 	long ret = 0;
 1981 
 1982 	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
 1983 		return -EIO;
 1984 	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
 1985 		return -ENOSPC;
 1986 	if (!f2fs_is_compress_backend_ready(inode) || IS_DEVICE_ALIASING(inode))
 1987 		return -EOPNOTSUPP;
 1988 
 1989 	/* f2fs only support ->fallocate for regular file */
 1990 	if (!S_ISREG(inode->i_mode))
 1991 		return -EINVAL;
 1992 
 1993 	if (IS_ENCRYPTED(inode) &&
 1994 		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
 1995 		return -EOPNOTSUPP;
 1996 
 1997 	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
 1998 			FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
 1999 			FALLOC_FL_INSERT_RANGE))
 2000 		return -EOPNOTSUPP;
 2001 
 2002 	inode_lock(inode);
 2003 
 2004 	/*
 2005 	 * Pinned file should not support partial truncation since the block
 2006 	 * can be used by applications.
 2007 	 */
 2008 	if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
 2009 		(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
 2010 			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) {
 2011 		ret = -EOPNOTSUPP;
 2012 		goto out;
 2013 	}
 2014 
 2015 	ret = file_modified(file);
 2016 	if (ret)
 2017 		goto out;
 2018 
 2019 	/*
 2020 	 * wait for inflight dio, blocks should be removed after IO
 2021 	 * completion.
 2022 	 */
 2023 	inode_dio_wait(inode);
 2024 
 2025 	if (mode & FALLOC_FL_PUNCH_HOLE) {
 2026 		if (offset >= inode->i_size)
 2027 			goto out;
 2028 
 2029 		ret = f2fs_punch_hole(inode, offset, len);
 2030 	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
 2031 		ret = f2fs_collapse_range(inode, offset, len);
 2032 	} else if (mode & FALLOC_FL_ZERO_RANGE) {
 2033 		ret = f2fs_zero_range(inode, offset, len, mode);
 2034 	} else if (mode & FALLOC_FL_INSERT_RANGE) {
 2035 		ret = f2fs_insert_range(inode, offset, len);
 2036 	} else {
 2037 		ret = f2fs_expand_inode_data(inode, offset, len, mode);
 2038 	}
 2039 
 2040 	if (!ret) {
 2041 		inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 2042 		f2fs_mark_inode_dirty_sync(inode, false);
 2043 		f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 2044 	}
 2045 
 2046 out:
 2047 	inode_unlock(inode);
 2048 
 2049 	trace_f2fs_fallocate(inode, mode, offset, len, ret);
 2050 	return ret;
 2051 }
 2052 
 2053 static int f2fs_release_file(struct inode *inode, struct file *filp)
 2054 {
 2055 	if (atomic_dec_and_test(&F2FS_I(inode)->open_count))
 2056 		f2fs_remove_donate_inode(inode);
 2057 
 2058 	/*
 2059 	 * f2fs_release_file is called at every close calls. So we should
 2060 	 * not drop any inmemory pages by close called by other process.
 2061 	 */
 2062 	if (!(filp->f_mode & FMODE_WRITE) ||
 2063 			atomic_read(&inode->i_writecount) != 1)
 2064 		return 0;
 2065 
 2066 	inode_lock(inode);
 2067 	f2fs_abort_atomic_write(inode, true);
 2068 	inode_unlock(inode);
 2069 
 2070 	return 0;
 2071 }
 2072 
 2073 static int f2fs_file_flush(struct file *file, fl_owner_t id)
 2074 {
 2075 	struct inode *inode = file_inode(file);
 2076 
 2077 	/*
 2078 	 * If the process doing a transaction is crashed, we should do
 2079 	 * roll-back. Otherwise, other reader/write can see corrupted database
 2080 	 * until all the writers close its file. Since this should be done
 2081 	 * before dropping file lock, it needs to do in ->flush.
 2082 	 */
 2083 	if (F2FS_I(inode)->atomic_write_task == current &&
 2084 				(current->flags & PF_EXITING)) {
 2085 		inode_lock(inode);
 2086 		f2fs_abort_atomic_write(inode, true);
 2087 		inode_unlock(inode);
 2088 	}
 2089 
 2090 	return 0;
 2091 }
 2092 
 2093 static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
 2094 {
 2095 	struct f2fs_inode_info *fi = F2FS_I(inode);
 2096 	u32 masked_flags = fi->i_flags & mask;
 2097 
 2098 	/* mask can be shrunk by flags_valid selector */
 2099 	iflags &= mask;
 2100 
 2101 	/* Is it quota file? Do not allow user to mess with it */
 2102 	if (IS_NOQUOTA(inode))
 2103 		return -EPERM;
 2104 
 2105 	if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) {
 2106 		if (!f2fs_sb_has_casefold(F2FS_I_SB(inode)))
 2107 			return -EOPNOTSUPP;
 2108 		if (!f2fs_empty_dir(inode))
 2109 			return -ENOTEMPTY;
 2110 	}
 2111 
 2112 	if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) {
 2113 		if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
 2114 			return -EOPNOTSUPP;
 2115 		if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL))
 2116 			return -EINVAL;
 2117 	}
 2118 
 2119 	if ((iflags ^ masked_flags) & F2FS_COMPR_FL) {
 2120 		if (masked_flags & F2FS_COMPR_FL) {
 2121 			if (!f2fs_disable_compressed_file(inode))
 2122 				return -EINVAL;
 2123 		} else {
 2124 			/* try to convert inline_data to support compression */
 2125 			int err = f2fs_convert_inline_inode(inode);
 2126 			if (err)
 2127 				return err;
 2128 
 2129 			f2fs_down_write(&fi->i_sem);
 2130 			if (!f2fs_may_compress(inode) ||
 2131 				atomic_read(&fi->writeback) ||
 2132 				(S_ISREG(inode->i_mode) &&
 2133 				F2FS_HAS_BLOCKS(inode))) {
 2134 				f2fs_up_write(&fi->i_sem);
 2135 				return -EINVAL;
 2136 			}
 2137 			err = set_compress_context(inode);
 2138 			f2fs_up_write(&fi->i_sem);
 2139 
 2140 			if (err)
 2141 				return err;
 2142 		}
 2143 	}
 2144 
 2145 	fi->i_flags = iflags | (fi->i_flags & ~mask);
 2146 	f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) &&
 2147 					(fi->i_flags & F2FS_NOCOMP_FL));
 2148 
 2149 	if (fi->i_flags & F2FS_PROJINHERIT_FL)
 2150 		set_inode_flag(inode, FI_PROJ_INHERIT);
 2151 	else
 2152 		clear_inode_flag(inode, FI_PROJ_INHERIT);
 2153 
 2154 	inode_set_ctime_current(inode);
 2155 	f2fs_set_inode_flags(inode);
 2156 	f2fs_mark_inode_dirty_sync(inode, true);
 2157 	return 0;
 2158 }
 2159 
 2160 /* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */
 2161 
 2162 /*
 2163  * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
 2164  * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
 2165  * F2FS_GETTABLE_FS_FL.  To also make it settable via FS_IOC_SETFLAGS, also add
 2166  * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
 2167  *
 2168  * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and
 2169  * FS_IOC_FSSETXATTR is done by the VFS.
 2170  */
 2171 
 2172 static const struct {
 2173 	u32 iflag;
 2174 	u32 fsflag;
 2175 } f2fs_fsflags_map[] = {
 2176 	{ F2FS_COMPR_FL,	FS_COMPR_FL },
 2177 	{ F2FS_SYNC_FL,		FS_SYNC_FL },
 2178 	{ F2FS_IMMUTABLE_FL,	FS_IMMUTABLE_FL },
 2179 	{ F2FS_APPEND_FL,	FS_APPEND_FL },
 2180 	{ F2FS_NODUMP_FL,	FS_NODUMP_FL },
 2181 	{ F2FS_NOATIME_FL,	FS_NOATIME_FL },
 2182 	{ F2FS_NOCOMP_FL,	FS_NOCOMP_FL },
 2183 	{ F2FS_INDEX_FL,	FS_INDEX_FL },
 2184 	{ F2FS_DIRSYNC_FL,	FS_DIRSYNC_FL },
 2185 	{ F2FS_PROJINHERIT_FL,	FS_PROJINHERIT_FL },
 2186 	{ F2FS_CASEFOLD_FL,	FS_CASEFOLD_FL },
 2187 };
 2188 
 2189 #define F2FS_GETTABLE_FS_FL (		\
 2190 		FS_COMPR_FL |		\
 2191 		FS_SYNC_FL |		\
 2192 		FS_IMMUTABLE_FL |	\
 2193 		FS_APPEND_FL |		\
 2194 		FS_NODUMP_FL |		\
 2195 		FS_NOATIME_FL |		\
 2196 		FS_NOCOMP_FL |		\
 2197 		FS_INDEX_FL |		\
 2198 		FS_DIRSYNC_FL |		\
 2199 		FS_PROJINHERIT_FL |	\
 2200 		FS_ENCRYPT_FL |		\
 2201 		FS_INLINE_DATA_FL |	\
 2202 		FS_NOCOW_FL |		\
 2203 		FS_VERITY_FL |		\
 2204 		FS_CASEFOLD_FL)
 2205 
 2206 #define F2FS_SETTABLE_FS_FL (		\
 2207 		FS_COMPR_FL |		\
 2208 		FS_SYNC_FL |		\
 2209 		FS_IMMUTABLE_FL |	\
 2210 		FS_APPEND_FL |		\
 2211 		FS_NODUMP_FL |		\
 2212 		FS_NOATIME_FL |		\
 2213 		FS_NOCOMP_FL |		\
 2214 		FS_DIRSYNC_FL |		\
 2215 		FS_PROJINHERIT_FL |	\
 2216 		FS_CASEFOLD_FL)
 2217 
 2218 /* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
 2219 static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
 2220 {
 2221 	u32 fsflags = 0;
 2222 	int i;
 2223 
 2224 	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
 2225 		if (iflags & f2fs_fsflags_map[i].iflag)
 2226 			fsflags |= f2fs_fsflags_map[i].fsflag;
 2227 
 2228 	return fsflags;
 2229 }
 2230 
 2231 /* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
 2232 static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
 2233 {
 2234 	u32 iflags = 0;
 2235 	int i;
 2236 
 2237 	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
 2238 		if (fsflags & f2fs_fsflags_map[i].fsflag)
 2239 			iflags |= f2fs_fsflags_map[i].iflag;
 2240 
 2241 	return iflags;
 2242 }
 2243 
 2244 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
 2245 {
 2246 	struct inode *inode = file_inode(filp);
 2247 
 2248 	return put_user(inode->i_generation, (int __user *)arg);
 2249 }
 2250 
 2251 static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
 2252 {
 2253 	struct inode *inode = file_inode(filp);
 2254 	struct mnt_idmap *idmap = file_mnt_idmap(filp);
 2255 	struct f2fs_inode_info *fi = F2FS_I(inode);
 2256 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 2257 	loff_t isize;
 2258 	int ret;
 2259 
 2260 	if (!(filp->f_mode & FMODE_WRITE))
 2261 		return -EBADF;
 2262 
 2263 	if (!inode_owner_or_capable(idmap, inode))
 2264 		return -EACCES;
 2265 
 2266 	if (!S_ISREG(inode->i_mode))
 2267 		return -EINVAL;
 2268 
 2269 	if (filp->f_flags & O_DIRECT)
 2270 		return -EINVAL;
 2271 
 2272 	ret = mnt_want_write_file(filp);
 2273 	if (ret)
 2274 		return ret;
 2275 
 2276 	inode_lock(inode);
 2277 
 2278 	if (!f2fs_disable_compressed_file(inode) ||
 2279 			f2fs_is_pinned_file(inode)) {
 2280 		ret = -EINVAL;
 2281 		goto out;
 2282 	}
 2283 
 2284 	if (f2fs_is_atomic_file(inode))
 2285 		goto out;
 2286 
 2287 	ret = f2fs_convert_inline_inode(inode);
 2288 	if (ret)
 2289 		goto out;
 2290 
 2291 	f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 2292 	f2fs_down_write(&fi->i_gc_rwsem[READ]);
 2293 
 2294 	/*
 2295 	 * Should wait end_io to count F2FS_WB_CP_DATA correctly by
 2296 	 * f2fs_is_atomic_file.
 2297 	 */
 2298 	if (get_dirty_pages(inode))
 2299 		f2fs_warn(sbi, "Unexpected flush for atomic writes: ino=%lu, npages=%u",
 2300 			  inode->i_ino, get_dirty_pages(inode));
 2301 	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
 2302 	if (ret)
 2303 		goto out_unlock;
 2304 
 2305 	/* Check if the inode already has a COW inode */
 2306 	if (fi->cow_inode == NULL) {
 2307 		/* Create a COW inode for atomic write */
 2308 		struct dentry *dentry = file_dentry(filp);
 2309 		struct inode *dir = d_inode(dentry->d_parent);
 2310 
 2311 		ret = f2fs_get_tmpfile(idmap, dir, &fi->cow_inode);
 2312 		if (ret)
 2313 			goto out_unlock;
 2314 
 2315 		set_inode_flag(fi->cow_inode, FI_COW_FILE);
 2316 		clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
 2317 
 2318 		/* Set the COW inode's atomic_inode to the atomic inode */
 2319 		F2FS_I(fi->cow_inode)->atomic_inode = inode;
 2320 	} else {
 2321 		/* Reuse the already created COW inode */
 2322 		f2fs_bug_on(sbi, get_dirty_pages(fi->cow_inode));
 2323 
 2324 		invalidate_mapping_pages(fi->cow_inode->i_mapping, 0, -1);
 2325 
 2326 		ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
 2327 		if (ret)
 2328 			goto out_unlock;
 2329 	}
 2330 
 2331 	f2fs_write_inode(inode, NULL);
 2332 
 2333 	stat_inc_atomic_inode(inode);
 2334 
 2335 	set_inode_flag(inode, FI_ATOMIC_FILE);
 2336 
 2337 	isize = i_size_read(inode);
 2338 	fi->original_i_size = isize;
 2339 	if (truncate) {
 2340 		set_inode_flag(inode, FI_ATOMIC_REPLACE);
 2341 		truncate_inode_pages_final(inode->i_mapping);
 2342 		f2fs_i_size_write(inode, 0);
 2343 		isize = 0;
 2344 	}
 2345 	f2fs_i_size_write(fi->cow_inode, isize);
 2346 
 2347 out_unlock:
 2348 	f2fs_up_write(&fi->i_gc_rwsem[READ]);
 2349 	f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
 2350 	if (ret)
 2351 		goto out;
 2352 
 2353 	f2fs_update_time(sbi, REQ_TIME);
 2354 	fi->atomic_write_task = current;
 2355 	stat_update_max_atomic_write(inode);
 2356 	fi->atomic_write_cnt = 0;
 2357 out:
 2358 	inode_unlock(inode);
 2359 	mnt_drop_write_file(filp);
 2360 	return ret;
 2361 }
 2362 
 2363 static int f2fs_ioc_commit_atomic_write(struct file *filp)
 2364 {
 2365 	struct inode *inode = file_inode(filp);
 2366 	struct mnt_idmap *idmap = file_mnt_idmap(filp);
 2367 	int ret;
 2368 
 2369 	if (!(filp->f_mode & FMODE_WRITE))
 2370 		return -EBADF;
 2371 
 2372 	if (!inode_owner_or_capable(idmap, inode))
 2373 		return -EACCES;
 2374 
 2375 	ret = mnt_want_write_file(filp);
 2376 	if (ret)
 2377 		return ret;
 2378 
 2379 	f2fs_balance_fs(F2FS_I_SB(inode), true);
 2380 
 2381 	inode_lock(inode);
 2382 
 2383 	if (f2fs_is_atomic_file(inode)) {
 2384 		ret = f2fs_commit_atomic_write(inode);
 2385 		if (!ret)
 2386 			ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
 2387 
 2388 		f2fs_abort_atomic_write(inode, ret);
 2389 	} else {
 2390 		ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
 2391 	}
 2392 
 2393 	inode_unlock(inode);
 2394 	mnt_drop_write_file(filp);
 2395 	return ret;
 2396 }
 2397 
 2398 static int f2fs_ioc_abort_atomic_write(struct file *filp)
 2399 {
 2400 	struct inode *inode = file_inode(filp);
 2401 	struct mnt_idmap *idmap = file_mnt_idmap(filp);
 2402 	int ret;
 2403 
 2404 	if (!(filp->f_mode & FMODE_WRITE))
 2405 		return -EBADF;
 2406 
 2407 	if (!inode_owner_or_capable(idmap, inode))
 2408 		return -EACCES;
 2409 
 2410 	ret = mnt_want_write_file(filp);
 2411 	if (ret)
 2412 		return ret;
 2413 
 2414 	inode_lock(inode);
 2415 
 2416 	f2fs_abort_atomic_write(inode, true);
 2417 
 2418 	inode_unlock(inode);
 2419 
 2420 	mnt_drop_write_file(filp);
 2421 	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 2422 	return ret;
 2423 }
 2424 
 2425 int f2fs_do_shutdown(struct f2fs_sb_info *sbi, unsigned int flag,
 2426 						bool readonly, bool need_lock)
 2427 {
 2428 	struct super_block *sb = sbi->sb;
 2429 	int ret = 0;
 2430 
 2431 	switch (flag) {
 2432 	case F2FS_GOING_DOWN_FULLSYNC:
 2433 		ret = bdev_freeze(sb->s_bdev);
 2434 		if (ret)
 2435 			goto out;
 2436 		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
 2437 		bdev_thaw(sb->s_bdev);
 2438 		break;
 2439 	case F2FS_GOING_DOWN_METASYNC:
 2440 		/* do checkpoint only */
 2441 		ret = f2fs_sync_fs(sb, 1);
 2442 		if (ret) {
 2443 			if (ret == -EIO)
 2444 				ret = 0;
 2445 			goto out;
 2446 		}
 2447 		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
 2448 		break;
 2449 	case F2FS_GOING_DOWN_NOSYNC:
 2450 		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
 2451 		break;
 2452 	case F2FS_GOING_DOWN_METAFLUSH:
 2453 		f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
 2454 		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
 2455 		break;
 2456 	case F2FS_GOING_DOWN_NEED_FSCK:
 2457 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 2458 		set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
 2459 		set_sbi_flag(sbi, SBI_IS_DIRTY);
 2460 		/* do checkpoint only */
 2461 		ret = f2fs_sync_fs(sb, 1);
 2462 		if (ret == -EIO)
 2463 			ret = 0;
 2464 		goto out;
 2465 	default:
 2466 		ret = -EINVAL;
 2467 		goto out;
 2468 	}
 2469 
 2470 	if (readonly)
 2471 		goto out;
 2472 
 2473 	/*
 2474 	 * grab sb->s_umount to avoid racing w/ remount() and other shutdown
 2475 	 * paths.
 2476 	 */
 2477 	if (need_lock)
 2478 		down_write(&sbi->sb->s_umount);
 2479 
 2480 	f2fs_stop_gc_thread(sbi);
 2481 	f2fs_stop_discard_thread(sbi);
 2482 
 2483 	f2fs_drop_discard_cmd(sbi);
 2484 	clear_opt(sbi, DISCARD);
 2485 
 2486 	if (need_lock)
 2487 		up_write(&sbi->sb->s_umount);
 2488 
 2489 	f2fs_update_time(sbi, REQ_TIME);
 2490 out:
 2491 
 2492 	trace_f2fs_shutdown(sbi, flag, ret);
 2493 
 2494 	return ret;
 2495 }
 2496 
 2497 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
 2498 {
 2499 	struct inode *inode = file_inode(filp);
 2500 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 2501 	__u32 in;
 2502 	int ret;
 2503 	bool need_drop = false, readonly = false;
 2504 
 2505 	if (!capable(CAP_SYS_ADMIN))
 2506 		return -EPERM;
 2507 
 2508 	if (get_user(in, (__u32 __user *)arg))
 2509 		return -EFAULT;
 2510 
 2511 	if (in != F2FS_GOING_DOWN_FULLSYNC) {
 2512 		ret = mnt_want_write_file(filp);
 2513 		if (ret) {
 2514 			if (ret != -EROFS)
 2515 				return ret;
 2516 
 2517 			/* fallback to nosync shutdown for readonly fs */
 2518 			in = F2FS_GOING_DOWN_NOSYNC;
 2519 			readonly = true;
 2520 		} else {
 2521 			need_drop = true;
 2522 		}
 2523 	}
 2524 
 2525 	ret = f2fs_do_shutdown(sbi, in, readonly, true);
 2526 
 2527 	if (need_drop)
 2528 		mnt_drop_write_file(filp);
 2529 
 2530 	return ret;
 2531 }
 2532 
 2533 static int f2fs_keep_noreuse_range(struct inode *inode,
 2534 				loff_t offset, loff_t len)
 2535 {
 2536 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 2537 	u64 max_bytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode));
 2538 	u64 start, end;
 2539 	int ret = 0;
 2540 
 2541 	if (!S_ISREG(inode->i_mode))
 2542 		return 0;
 2543 
 2544 	if (offset >= max_bytes || len > max_bytes ||
 2545 	    (offset + len) > max_bytes)
 2546 		return 0;
 2547 
 2548 	start = offset >> PAGE_SHIFT;
 2549 	end = DIV_ROUND_UP(offset + len, PAGE_SIZE);
 2550 
 2551 	inode_lock(inode);
 2552 	if (f2fs_is_atomic_file(inode)) {
 2553 		inode_unlock(inode);
 2554 		return 0;
 2555 	}
 2556 
 2557 	spin_lock(&sbi->inode_lock[DONATE_INODE]);
 2558 	/* let's remove the range, if len = 0 */
 2559 	if (!len) {
 2560 		if (!list_empty(&F2FS_I(inode)->gdonate_list)) {
 2561 			list_del_init(&F2FS_I(inode)->gdonate_list);
 2562 			sbi->donate_files--;
 2563 			if (is_inode_flag_set(inode, FI_DONATE_FINISHED))
 2564 				ret = -EALREADY;
 2565 			else
 2566 				set_inode_flag(inode, FI_DONATE_FINISHED);
 2567 		} else
 2568 			ret = -ENOENT;
 2569 	} else {
 2570 		if (list_empty(&F2FS_I(inode)->gdonate_list)) {
 2571 			list_add_tail(&F2FS_I(inode)->gdonate_list,
 2572 					&sbi->inode_list[DONATE_INODE]);
 2573 			sbi->donate_files++;
 2574 		} else {
 2575 			list_move_tail(&F2FS_I(inode)->gdonate_list,
 2576 					&sbi->inode_list[DONATE_INODE]);
 2577 		}
 2578 		F2FS_I(inode)->donate_start = start;
 2579 		F2FS_I(inode)->donate_end = end - 1;
 2580 		clear_inode_flag(inode, FI_DONATE_FINISHED);
 2581 	}
 2582 	spin_unlock(&sbi->inode_lock[DONATE_INODE]);
 2583 	inode_unlock(inode);
 2584 
 2585 	return ret;
 2586 }
 2587 
 2588 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
 2589 {
 2590 	struct inode *inode = file_inode(filp);
 2591 	struct super_block *sb = inode->i_sb;
 2592 	struct fstrim_range range;
 2593 	int ret;
 2594 
 2595 	if (!capable(CAP_SYS_ADMIN))
 2596 		return -EPERM;
 2597 
 2598 	if (!f2fs_hw_support_discard(F2FS_SB(sb)))
 2599 		return -EOPNOTSUPP;
 2600 
 2601 	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
 2602 				sizeof(range)))
 2603 		return -EFAULT;
 2604 
 2605 	ret = mnt_want_write_file(filp);
 2606 	if (ret)
 2607 		return ret;
 2608 
 2609 	range.minlen = max((unsigned int)range.minlen,
 2610 			   bdev_discard_granularity(sb->s_bdev));
 2611 	ret = f2fs_trim_fs(F2FS_SB(sb), &range);
 2612 	mnt_drop_write_file(filp);
 2613 	if (ret < 0)
 2614 		return ret;
 2615 
 2616 	if (copy_to_user((struct fstrim_range __user *)arg, &range,
 2617 				sizeof(range)))
 2618 		return -EFAULT;
 2619 	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 2620 	return 0;
 2621 }
 2622 
 2623 static bool uuid_is_nonzero(__u8 u[16])
 2624 {
 2625 	int i;
 2626 
 2627 	for (i = 0; i < 16; i++)
 2628 		if (u[i])
 2629 			return true;
 2630 	return false;
 2631 }
 2632 
 2633 static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
 2634 {
 2635 	struct inode *inode = file_inode(filp);
 2636 	int ret;
 2637 
 2638 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))
 2639 		return -EOPNOTSUPP;
 2640 
 2641 	ret = fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
 2642 	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 2643 	return ret;
 2644 }
 2645 
 2646 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
 2647 {
 2648 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2649 		return -EOPNOTSUPP;
 2650 	return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
 2651 }
 2652 
 2653 static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
 2654 {
 2655 	struct inode *inode = file_inode(filp);
 2656 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 2657 	u8 encrypt_pw_salt[16];
 2658 	int err;
 2659 
 2660 	if (!f2fs_sb_has_encrypt(sbi))
 2661 		return -EOPNOTSUPP;
 2662 
 2663 	err = mnt_want_write_file(filp);
 2664 	if (err)
 2665 		return err;
 2666 
 2667 	f2fs_down_write(&sbi->sb_lock);
 2668 
 2669 	if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
 2670 		goto got_it;
 2671 
 2672 	/* update superblock with uuid */
 2673 	generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
 2674 
 2675 	err = f2fs_commit_super(sbi, false);
 2676 	if (err) {
 2677 		/* undo new data */
 2678 		memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
 2679 		goto out_err;
 2680 	}
 2681 got_it:
 2682 	memcpy(encrypt_pw_salt, sbi->raw_super->encrypt_pw_salt, 16);
 2683 out_err:
 2684 	f2fs_up_write(&sbi->sb_lock);
 2685 	mnt_drop_write_file(filp);
 2686 
 2687 	if (!err && copy_to_user((__u8 __user *)arg, encrypt_pw_salt, 16))
 2688 		err = -EFAULT;
 2689 
 2690 	return err;
 2691 }
 2692 
 2693 static int f2fs_ioc_get_encryption_policy_ex(struct file *filp,
 2694 					     unsigned long arg)
 2695 {
 2696 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2697 		return -EOPNOTSUPP;
 2698 
 2699 	return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
 2700 }
 2701 
 2702 static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg)
 2703 {
 2704 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2705 		return -EOPNOTSUPP;
 2706 
 2707 	return fscrypt_ioctl_add_key(filp, (void __user *)arg);
 2708 }
 2709 
 2710 static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg)
 2711 {
 2712 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2713 		return -EOPNOTSUPP;
 2714 
 2715 	return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
 2716 }
 2717 
 2718 static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp,
 2719 						    unsigned long arg)
 2720 {
 2721 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2722 		return -EOPNOTSUPP;
 2723 
 2724 	return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg);
 2725 }
 2726 
 2727 static int f2fs_ioc_get_encryption_key_status(struct file *filp,
 2728 					      unsigned long arg)
 2729 {
 2730 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2731 		return -EOPNOTSUPP;
 2732 
 2733 	return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
 2734 }
 2735 
 2736 static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg)
 2737 {
 2738 	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
 2739 		return -EOPNOTSUPP;
 2740 
 2741 	return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
 2742 }
 2743 
 2744 static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
 2745 {
 2746 	struct inode *inode = file_inode(filp);
 2747 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 2748 	struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,
 2749 			.no_bg_gc = false,
 2750 			.should_migrate_blocks = false,
 2751 			.nr_free_secs = 0 };
 2752 	__u32 sync;
 2753 	int ret;
 2754 
 2755 	if (!capable(CAP_SYS_ADMIN))
 2756 		return -EPERM;
 2757 
 2758 	if (get_user(sync, (__u32 __user *)arg))
 2759 		return -EFAULT;
 2760 
 2761 	if (f2fs_readonly(sbi->sb))
 2762 		return -EROFS;
 2763 
 2764 	ret = mnt_want_write_file(filp);
 2765 	if (ret)
 2766 		return ret;
 2767 
 2768 	if (!sync) {
 2769 		if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
 2770 			ret = -EBUSY;
 2771 			goto out;
 2772 		}
 2773 	} else {
 2774 		f2fs_down_write(&sbi->gc_lock);
 2775 	}
 2776 
 2777 	gc_control.init_gc_type = sync ? FG_GC : BG_GC;
 2778 	gc_control.err_gc_skipped = sync;
 2779 	stat_inc_gc_call_count(sbi, FOREGROUND);
 2780 	ret = f2fs_gc(sbi, &gc_control);
 2781 out:
 2782 	mnt_drop_write_file(filp);
 2783 	return ret;
 2784 }
 2785 
 2786 static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range)
 2787 {
 2788 	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
 2789 	struct f2fs_gc_control gc_control = {
 2790 			.init_gc_type = range->sync ? FG_GC : BG_GC,
 2791 			.no_bg_gc = false,
 2792 			.should_migrate_blocks = false,
 2793 			.err_gc_skipped = range->sync,
 2794 			.nr_free_secs = 0 };
 2795 	u64 end;
 2796 	int ret;
 2797 
 2798 	if (!capable(CAP_SYS_ADMIN))
 2799 		return -EPERM;
 2800 	if (f2fs_readonly(sbi->sb))
 2801 		return -EROFS;
 2802 
 2803 	end = range->start + range->len;
 2804 	if (end < range->start || range->start < MAIN_BLKADDR(sbi) ||
 2805 					end >= MAX_BLKADDR(sbi))
 2806 		return -EINVAL;
 2807 
 2808 	ret = mnt_want_write_file(filp);
 2809 	if (ret)
 2810 		return ret;
 2811 
 2812 do_more:
 2813 	if (!range->sync) {
 2814 		if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
 2815 			ret = -EBUSY;
 2816 			goto out;
 2817 		}
 2818 	} else {
 2819 		f2fs_down_write(&sbi->gc_lock);
 2820 	}
 2821 
 2822 	gc_control.victim_segno = GET_SEGNO(sbi, range->start);
 2823 	stat_inc_gc_call_count(sbi, FOREGROUND);
 2824 	ret = f2fs_gc(sbi, &gc_control);
 2825 	if (ret) {
 2826 		if (ret == -EBUSY)
 2827 			ret = -EAGAIN;
 2828 		goto out;
 2829 	}
 2830 	range->start += CAP_BLKS_PER_SEC(sbi);
 2831 	if (range->start <= end)
 2832 		goto do_more;
 2833 out:
 2834 	mnt_drop_write_file(filp);
 2835 	return ret;
 2836 }
 2837 
 2838 static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
 2839 {
 2840 	struct f2fs_gc_range range;
 2841 
 2842 	if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
 2843 							sizeof(range)))
 2844 		return -EFAULT;
 2845 	return __f2fs_ioc_gc_range(filp, &range);
 2846 }
 2847 
 2848 static int f2fs_ioc_write_checkpoint(struct file *filp)
 2849 {
 2850 	struct inode *inode = file_inode(filp);
 2851 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 2852 	int ret;
 2853 
 2854 	if (!capable(CAP_SYS_ADMIN))
 2855 		return -EPERM;
 2856 
 2857 	if (f2fs_readonly(sbi->sb))
 2858 		return -EROFS;
 2859 
 2860 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
 2861 		f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
 2862 		return -EINVAL;
 2863 	}
 2864 
 2865 	ret = mnt_want_write_file(filp);
 2866 	if (ret)
 2867 		return ret;
 2868 
 2869 	ret = f2fs_sync_fs(sbi->sb, 1);
 2870 
 2871 	mnt_drop_write_file(filp);
 2872 	return ret;
 2873 }
 2874 
 2875 static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
 2876 					struct file *filp,
 2877 					struct f2fs_defragment *range)
 2878 {
 2879 	struct inode *inode = file_inode(filp);
 2880 	struct f2fs_map_blocks map = { .m_next_extent = NULL,
 2881 					.m_seg_type = NO_CHECK_TYPE,
 2882 					.m_may_create = false };
 2883 	struct extent_info ei = {};
 2884 	pgoff_t pg_start, pg_end, next_pgofs;
 2885 	unsigned int total = 0, sec_num;
 2886 	block_t blk_end = 0;
 2887 	bool fragmented = false;
 2888 	int err;
 2889 
 2890 	f2fs_balance_fs(sbi, true);
 2891 
 2892 	inode_lock(inode);
 2893 	pg_start = range->start >> PAGE_SHIFT;
 2894 	pg_end = min_t(pgoff_t,
 2895 				(range->start + range->len) >> PAGE_SHIFT,
 2896 				DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE));
 2897 
 2898 	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) ||
 2899 		f2fs_is_atomic_file(inode)) {
 2900 		err = -EINVAL;
 2901 		goto unlock_out;
 2902 	}
 2903 
 2904 	/* if in-place-update policy is enabled, don't waste time here */
 2905 	set_inode_flag(inode, FI_OPU_WRITE);
 2906 	if (f2fs_should_update_inplace(inode, NULL)) {
 2907 		err = -EINVAL;
 2908 		goto out;
 2909 	}
 2910 
 2911 	/* writeback all dirty pages in the range */
 2912 	err = filemap_write_and_wait_range(inode->i_mapping,
 2913 						pg_start << PAGE_SHIFT,
 2914 						(pg_end << PAGE_SHIFT) - 1);
 2915 	if (err)
 2916 		goto out;
 2917 
 2918 	/*
 2919 	 * lookup mapping info in extent cache, skip defragmenting if physical
 2920 	 * block addresses are continuous.
 2921 	 */
 2922 	if (f2fs_lookup_read_extent_cache(inode, pg_start, &ei)) {
 2923 		if ((pgoff_t)ei.fofs + ei.len >= pg_end)
 2924 			goto out;
 2925 	}
 2926 
 2927 	map.m_lblk = pg_start;
 2928 	map.m_next_pgofs = &next_pgofs;
 2929 
 2930 	/*
 2931 	 * lookup mapping info in dnode page cache, skip defragmenting if all
 2932 	 * physical block addresses are continuous even if there are hole(s)
 2933 	 * in logical blocks.
 2934 	 */
 2935 	while (map.m_lblk < pg_end) {
 2936 		map.m_len = pg_end - map.m_lblk;
 2937 		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);
 2938 		if (err)
 2939 			goto out;
 2940 
 2941 		if (!(map.m_flags & F2FS_MAP_FLAGS)) {
 2942 			map.m_lblk = next_pgofs;
 2943 			continue;
 2944 		}
 2945 
 2946 		if (blk_end && blk_end != map.m_pblk)
 2947 			fragmented = true;
 2948 
 2949 		/* record total count of block that we're going to move */
 2950 		total += map.m_len;
 2951 
 2952 		blk_end = map.m_pblk + map.m_len;
 2953 
 2954 		map.m_lblk += map.m_len;
 2955 	}
 2956 
 2957 	if (!fragmented) {
 2958 		total = 0;
 2959 		goto out;
 2960 	}
 2961 
 2962 	sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi));
 2963 
 2964 	/*
 2965 	 * make sure there are enough free section for LFS allocation, this can
 2966 	 * avoid defragment running in SSR mode when free section are allocated
 2967 	 * intensively
 2968 	 */
 2969 	if (has_not_enough_free_secs(sbi, 0, sec_num)) {
 2970 		err = -EAGAIN;
 2971 		goto out;
 2972 	}
 2973 
 2974 	map.m_lblk = pg_start;
 2975 	map.m_len = pg_end - pg_start;
 2976 	total = 0;
 2977 
 2978 	while (map.m_lblk < pg_end) {
 2979 		pgoff_t idx;
 2980 		int cnt = 0;
 2981 
 2982 do_map:
 2983 		map.m_len = pg_end - map.m_lblk;
 2984 		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);
 2985 		if (err)
 2986 			goto clear_out;
 2987 
 2988 		if (!(map.m_flags & F2FS_MAP_FLAGS)) {
 2989 			map.m_lblk = next_pgofs;
 2990 			goto check;
 2991 		}
 2992 
 2993 		set_inode_flag(inode, FI_SKIP_WRITES);
 2994 
 2995 		idx = map.m_lblk;
 2996 		while (idx < map.m_lblk + map.m_len &&
 2997 						cnt < BLKS_PER_SEG(sbi)) {
 2998 			struct folio *folio;
 2999 
 3000 			folio = f2fs_get_lock_data_folio(inode, idx, true);
 3001 			if (IS_ERR(folio)) {
 3002 				err = PTR_ERR(folio);
 3003 				goto clear_out;
 3004 			}
 3005 
 3006 			f2fs_folio_wait_writeback(folio, DATA, true, true);
 3007 
 3008 			folio_mark_dirty(folio);
 3009 			folio_set_f2fs_gcing(folio);
 3010 			f2fs_folio_put(folio, true);
 3011 
 3012 			idx++;
 3013 			cnt++;
 3014 			total++;
 3015 		}
 3016 
 3017 		map.m_lblk = idx;
 3018 check:
 3019 		if (map.m_lblk < pg_end && cnt < BLKS_PER_SEG(sbi))
 3020 			goto do_map;
 3021 
 3022 		clear_inode_flag(inode, FI_SKIP_WRITES);
 3023 
 3024 		err = filemap_fdatawrite(inode->i_mapping);
 3025 		if (err)
 3026 			goto out;
 3027 	}
 3028 clear_out:
 3029 	clear_inode_flag(inode, FI_SKIP_WRITES);
 3030 out:
 3031 	clear_inode_flag(inode, FI_OPU_WRITE);
 3032 unlock_out:
 3033 	inode_unlock(inode);
 3034 	if (!err)
 3035 		range->len = (u64)total << PAGE_SHIFT;
 3036 	return err;
 3037 }
 3038 
 3039 static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
 3040 {
 3041 	struct inode *inode = file_inode(filp);
 3042 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3043 	struct f2fs_defragment range;
 3044 	int err;
 3045 
 3046 	if (!capable(CAP_SYS_ADMIN))
 3047 		return -EPERM;
 3048 
 3049 	if (!S_ISREG(inode->i_mode))
 3050 		return -EINVAL;
 3051 
 3052 	if (f2fs_readonly(sbi->sb))
 3053 		return -EROFS;
 3054 
 3055 	if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
 3056 							sizeof(range)))
 3057 		return -EFAULT;
 3058 
 3059 	/* verify alignment of offset & size */
 3060 	if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
 3061 		return -EINVAL;
 3062 
 3063 	if (unlikely((range.start + range.len) >> PAGE_SHIFT >
 3064 					max_file_blocks(inode)))
 3065 		return -EINVAL;
 3066 
 3067 	err = mnt_want_write_file(filp);
 3068 	if (err)
 3069 		return err;
 3070 
 3071 	err = f2fs_defragment_range(sbi, filp, &range);
 3072 	mnt_drop_write_file(filp);
 3073 
 3074 	if (range.len)
 3075 		f2fs_update_time(sbi, REQ_TIME);
 3076 	if (err < 0)
 3077 		return err;
 3078 
 3079 	if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
 3080 							sizeof(range)))
 3081 		return -EFAULT;
 3082 
 3083 	return 0;
 3084 }
 3085 
 3086 static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
 3087 			struct file *file_out, loff_t pos_out, size_t len)
 3088 {
 3089 	struct inode *src = file_inode(file_in);
 3090 	struct inode *dst = file_inode(file_out);
 3091 	struct f2fs_sb_info *sbi = F2FS_I_SB(src);
 3092 	size_t olen = len, dst_max_i_size = 0;
 3093 	size_t dst_osize;
 3094 	int ret;
 3095 
 3096 	if (file_in->f_path.mnt != file_out->f_path.mnt ||
 3097 				src->i_sb != dst->i_sb)
 3098 		return -EXDEV;
 3099 
 3100 	if (unlikely(f2fs_readonly(src->i_sb)))
 3101 		return -EROFS;
 3102 
 3103 	if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
 3104 		return -EINVAL;
 3105 
 3106 	if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
 3107 		return -EOPNOTSUPP;
 3108 
 3109 	if (pos_out < 0 || pos_in < 0)
 3110 		return -EINVAL;
 3111 
 3112 	if (src == dst) {
 3113 		if (pos_in == pos_out)
 3114 			return 0;
 3115 		if (pos_out > pos_in && pos_out < pos_in + len)
 3116 			return -EINVAL;
 3117 	}
 3118 
 3119 	inode_lock(src);
 3120 	if (src != dst) {
 3121 		ret = -EBUSY;
 3122 		if (!inode_trylock(dst))
 3123 			goto out;
 3124 	}
 3125 
 3126 	if (f2fs_compressed_file(src) || f2fs_compressed_file(dst) ||
 3127 		f2fs_is_pinned_file(src) || f2fs_is_pinned_file(dst)) {
 3128 		ret = -EOPNOTSUPP;
 3129 		goto out_unlock;
 3130 	}
 3131 
 3132 	if (f2fs_is_atomic_file(src) || f2fs_is_atomic_file(dst)) {
 3133 		ret = -EINVAL;
 3134 		goto out_unlock;
 3135 	}
 3136 
 3137 	ret = -EINVAL;
 3138 	if (pos_in + len > src->i_size || pos_in + len < pos_in)
 3139 		goto out_unlock;
 3140 	if (len == 0)
 3141 		olen = len = src->i_size - pos_in;
 3142 	if (pos_in + len == src->i_size)
 3143 		len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
 3144 	if (len == 0) {
 3145 		ret = 0;
 3146 		goto out_unlock;
 3147 	}
 3148 
 3149 	dst_osize = dst->i_size;
 3150 	if (pos_out + olen > dst->i_size)
 3151 		dst_max_i_size = pos_out + olen;
 3152 
 3153 	/* verify the end result is block aligned */
 3154 	if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
 3155 			!IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
 3156 			!IS_ALIGNED(pos_out, F2FS_BLKSIZE))
 3157 		goto out_unlock;
 3158 
 3159 	ret = f2fs_convert_inline_inode(src);
 3160 	if (ret)
 3161 		goto out_unlock;
 3162 
 3163 	ret = f2fs_convert_inline_inode(dst);
 3164 	if (ret)
 3165 		goto out_unlock;
 3166 
 3167 	/* write out all dirty pages from offset */
 3168 	ret = filemap_write_and_wait_range(src->i_mapping,
 3169 					pos_in, pos_in + len);
 3170 	if (ret)
 3171 		goto out_unlock;
 3172 
 3173 	ret = filemap_write_and_wait_range(dst->i_mapping,
 3174 					pos_out, pos_out + len);
 3175 	if (ret)
 3176 		goto out_unlock;
 3177 
 3178 	f2fs_balance_fs(sbi, true);
 3179 
 3180 	f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
 3181 	if (src != dst) {
 3182 		ret = -EBUSY;
 3183 		if (!f2fs_down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))
 3184 			goto out_src;
 3185 	}
 3186 
 3187 	f2fs_lock_op(sbi);
 3188 	ret = __exchange_data_block(src, dst, F2FS_BYTES_TO_BLK(pos_in),
 3189 				F2FS_BYTES_TO_BLK(pos_out),
 3190 				F2FS_BYTES_TO_BLK(len), false);
 3191 
 3192 	if (!ret) {
 3193 		if (dst_max_i_size)
 3194 			f2fs_i_size_write(dst, dst_max_i_size);
 3195 		else if (dst_osize != dst->i_size)
 3196 			f2fs_i_size_write(dst, dst_osize);
 3197 	}
 3198 	f2fs_unlock_op(sbi);
 3199 
 3200 	if (src != dst)
 3201 		f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
 3202 out_src:
 3203 	f2fs_up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
 3204 	if (ret)
 3205 		goto out_unlock;
 3206 
 3207 	inode_set_mtime_to_ts(src, inode_set_ctime_current(src));
 3208 	f2fs_mark_inode_dirty_sync(src, false);
 3209 	if (src != dst) {
 3210 		inode_set_mtime_to_ts(dst, inode_set_ctime_current(dst));
 3211 		f2fs_mark_inode_dirty_sync(dst, false);
 3212 	}
 3213 	f2fs_update_time(sbi, REQ_TIME);
 3214 
 3215 out_unlock:
 3216 	if (src != dst)
 3217 		inode_unlock(dst);
 3218 out:
 3219 	inode_unlock(src);
 3220 	return ret;
 3221 }
 3222 
 3223 static int __f2fs_ioc_move_range(struct file *filp,
 3224 				struct f2fs_move_range *range)
 3225 {
 3226 	int err;
 3227 
 3228 	if (!(filp->f_mode & FMODE_READ) ||
 3229 			!(filp->f_mode & FMODE_WRITE))
 3230 		return -EBADF;
 3231 
 3232 	CLASS(fd, dst)(range->dst_fd);
 3233 	if (fd_empty(dst))
 3234 		return -EBADF;
 3235 
 3236 	if (!(fd_file(dst)->f_mode & FMODE_WRITE))
 3237 		return -EBADF;
 3238 
 3239 	err = mnt_want_write_file(filp);
 3240 	if (err)
 3241 		return err;
 3242 
 3243 	err = f2fs_move_file_range(filp, range->pos_in, fd_file(dst),
 3244 					range->pos_out, range->len);
 3245 
 3246 	mnt_drop_write_file(filp);
 3247 	return err;
 3248 }
 3249 
 3250 static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
 3251 {
 3252 	struct f2fs_move_range range;
 3253 
 3254 	if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
 3255 							sizeof(range)))
 3256 		return -EFAULT;
 3257 	return __f2fs_ioc_move_range(filp, &range);
 3258 }
 3259 
 3260 static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
 3261 {
 3262 	struct inode *inode = file_inode(filp);
 3263 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3264 	struct sit_info *sm = SIT_I(sbi);
 3265 	unsigned int start_segno = 0, end_segno = 0;
 3266 	unsigned int dev_start_segno = 0, dev_end_segno = 0;
 3267 	struct f2fs_flush_device range;
 3268 	struct f2fs_gc_control gc_control = {
 3269 			.init_gc_type = FG_GC,
 3270 			.should_migrate_blocks = true,
 3271 			.err_gc_skipped = true,
 3272 			.nr_free_secs = 0 };
 3273 	int ret;
 3274 
 3275 	if (!capable(CAP_SYS_ADMIN))
 3276 		return -EPERM;
 3277 
 3278 	if (f2fs_readonly(sbi->sb))
 3279 		return -EROFS;
 3280 
 3281 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
 3282 		return -EINVAL;
 3283 
 3284 	if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
 3285 							sizeof(range)))
 3286 		return -EFAULT;
 3287 
 3288 	if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
 3289 			__is_large_section(sbi)) {
 3290 		f2fs_warn(sbi, "Can't flush %u in %d for SEGS_PER_SEC %u != 1",
 3291 			  range.dev_num, sbi->s_ndevs, SEGS_PER_SEC(sbi));
 3292 		return -EINVAL;
 3293 	}
 3294 
 3295 	ret = mnt_want_write_file(filp);
 3296 	if (ret)
 3297 		return ret;
 3298 
 3299 	if (range.dev_num != 0)
 3300 		dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
 3301 	dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
 3302 
 3303 	start_segno = sm->last_victim[FLUSH_DEVICE];
 3304 	if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
 3305 		start_segno = dev_start_segno;
 3306 	end_segno = min(start_segno + range.segments, dev_end_segno);
 3307 
 3308 	while (start_segno < end_segno) {
 3309 		if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
 3310 			ret = -EBUSY;
 3311 			goto out;
 3312 		}
 3313 		sm->last_victim[GC_CB] = end_segno + 1;
 3314 		sm->last_victim[GC_GREEDY] = end_segno + 1;
 3315 		sm->last_victim[ALLOC_NEXT] = end_segno + 1;
 3316 
 3317 		gc_control.victim_segno = start_segno;
 3318 		stat_inc_gc_call_count(sbi, FOREGROUND);
 3319 		ret = f2fs_gc(sbi, &gc_control);
 3320 		if (ret == -EAGAIN)
 3321 			ret = 0;
 3322 		else if (ret < 0)
 3323 			break;
 3324 		start_segno++;
 3325 	}
 3326 out:
 3327 	mnt_drop_write_file(filp);
 3328 	return ret;
 3329 }
 3330 
 3331 static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
 3332 {
 3333 	struct inode *inode = file_inode(filp);
 3334 	u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
 3335 
 3336 	/* Must validate to set it with SQLite behavior in Android. */
 3337 	sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
 3338 
 3339 	return put_user(sb_feature, (u32 __user *)arg);
 3340 }
 3341 
 3342 #ifdef CONFIG_QUOTA
 3343 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
 3344 {
 3345 	struct dquot *transfer_to[MAXQUOTAS] = {};
 3346 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3347 	struct super_block *sb = sbi->sb;
 3348 	int err;
 3349 
 3350 	transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
 3351 	if (IS_ERR(transfer_to[PRJQUOTA]))
 3352 		return PTR_ERR(transfer_to[PRJQUOTA]);
 3353 
 3354 	err = __dquot_transfer(inode, transfer_to);
 3355 	if (err)
 3356 		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
 3357 	dqput(transfer_to[PRJQUOTA]);
 3358 	return err;
 3359 }
 3360 
 3361 static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
 3362 {
 3363 	struct f2fs_inode_info *fi = F2FS_I(inode);
 3364 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3365 	struct f2fs_inode *ri = NULL;
 3366 	kprojid_t kprojid;
 3367 	int err;
 3368 
 3369 	if (!f2fs_sb_has_project_quota(sbi)) {
 3370 		if (projid != F2FS_DEF_PROJID)
 3371 			return -EOPNOTSUPP;
 3372 		else
 3373 			return 0;
 3374 	}
 3375 
 3376 	if (!f2fs_has_extra_attr(inode))
 3377 		return -EOPNOTSUPP;
 3378 
 3379 	kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
 3380 
 3381 	if (projid_eq(kprojid, fi->i_projid))
 3382 		return 0;
 3383 
 3384 	err = -EPERM;
 3385 	/* Is it quota file? Do not allow user to mess with it */
 3386 	if (IS_NOQUOTA(inode))
 3387 		return err;
 3388 
 3389 	if (!F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
 3390 		return -EOVERFLOW;
 3391 
 3392 	err = f2fs_dquot_initialize(inode);
 3393 	if (err)
 3394 		return err;
 3395 
 3396 	f2fs_lock_op(sbi);
 3397 	err = f2fs_transfer_project_quota(inode, kprojid);
 3398 	if (err)
 3399 		goto out_unlock;
 3400 
 3401 	fi->i_projid = kprojid;
 3402 	inode_set_ctime_current(inode);
 3403 	f2fs_mark_inode_dirty_sync(inode, true);
 3404 out_unlock:
 3405 	f2fs_unlock_op(sbi);
 3406 	return err;
 3407 }
 3408 #else
 3409 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
 3410 {
 3411 	return 0;
 3412 }
 3413 
 3414 static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
 3415 {
 3416 	if (projid != F2FS_DEF_PROJID)
 3417 		return -EOPNOTSUPP;
 3418 	return 0;
 3419 }
 3420 #endif
 3421 
 3422 int f2fs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
 3423 {
 3424 	struct inode *inode = d_inode(dentry);
 3425 	struct f2fs_inode_info *fi = F2FS_I(inode);
 3426 	u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
 3427 
 3428 	if (IS_ENCRYPTED(inode))
 3429 		fsflags |= FS_ENCRYPT_FL;
 3430 	if (IS_VERITY(inode))
 3431 		fsflags |= FS_VERITY_FL;
 3432 	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
 3433 		fsflags |= FS_INLINE_DATA_FL;
 3434 	if (is_inode_flag_set(inode, FI_PIN_FILE))
 3435 		fsflags |= FS_NOCOW_FL;
 3436 
 3437 	fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL);
 3438 
 3439 	if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
 3440 		fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);
 3441 
 3442 	return 0;
 3443 }
 3444 
 3445 int f2fs_fileattr_set(struct mnt_idmap *idmap,
 3446 		      struct dentry *dentry, struct file_kattr *fa)
 3447 {
 3448 	struct inode *inode = d_inode(dentry);
 3449 	u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL;
 3450 	u32 iflags;
 3451 	int err;
 3452 
 3453 	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
 3454 		return -EIO;
 3455 	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
 3456 		return -ENOSPC;
 3457 	if (fsflags & ~F2FS_GETTABLE_FS_FL)
 3458 		return -EOPNOTSUPP;
 3459 	fsflags &= F2FS_SETTABLE_FS_FL;
 3460 	if (!fa->flags_valid)
 3461 		mask &= FS_COMMON_FL;
 3462 
 3463 	iflags = f2fs_fsflags_to_iflags(fsflags);
 3464 	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
 3465 		return -EOPNOTSUPP;
 3466 
 3467 	err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask));
 3468 	if (!err)
 3469 		err = f2fs_ioc_setproject(inode, fa->fsx_projid);
 3470 
 3471 	return err;
 3472 }
 3473 
 3474 int f2fs_pin_file_control(struct inode *inode, bool inc)
 3475 {
 3476 	struct f2fs_inode_info *fi = F2FS_I(inode);
 3477 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3478 
 3479 	if (IS_DEVICE_ALIASING(inode))
 3480 		return -EINVAL;
 3481 
 3482 	if (fi->i_gc_failures >= sbi->gc_pin_file_threshold) {
 3483 		f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
 3484 			  __func__, inode->i_ino, fi->i_gc_failures);
 3485 		clear_inode_flag(inode, FI_PIN_FILE);
 3486 		return -EAGAIN;
 3487 	}
 3488 
 3489 	/* Use i_gc_failures for normal file as a risk signal. */
 3490 	if (inc)
 3491 		f2fs_i_gc_failures_write(inode, fi->i_gc_failures + 1);
 3492 
 3493 	return 0;
 3494 }
 3495 
 3496 static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
 3497 {
 3498 	struct inode *inode = file_inode(filp);
 3499 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3500 	__u32 pin;
 3501 	int ret = 0;
 3502 
 3503 	if (get_user(pin, (__u32 __user *)arg))
 3504 		return -EFAULT;
 3505 
 3506 	if (!S_ISREG(inode->i_mode))
 3507 		return -EINVAL;
 3508 
 3509 	if (f2fs_readonly(sbi->sb))
 3510 		return -EROFS;
 3511 
 3512 	if (!pin && IS_DEVICE_ALIASING(inode))
 3513 		return -EOPNOTSUPP;
 3514 
 3515 	ret = mnt_want_write_file(filp);
 3516 	if (ret)
 3517 		return ret;
 3518 
 3519 	inode_lock(inode);
 3520 
 3521 	if (f2fs_is_atomic_file(inode)) {
 3522 		ret = -EINVAL;
 3523 		goto out;
 3524 	}
 3525 
 3526 	if (!pin) {
 3527 		clear_inode_flag(inode, FI_PIN_FILE);
 3528 		f2fs_i_gc_failures_write(inode, 0);
 3529 		goto done;
 3530 	} else if (f2fs_is_pinned_file(inode)) {
 3531 		goto done;
 3532 	}
 3533 
 3534 	if (F2FS_HAS_BLOCKS(inode)) {
 3535 		ret = -EFBIG;
 3536 		goto out;
 3537 	}
 3538 
 3539 	/* Let's allow file pinning on zoned device. */
 3540 	if (!f2fs_sb_has_blkzoned(sbi) &&
 3541 	    f2fs_should_update_outplace(inode, NULL)) {
 3542 		ret = -EINVAL;
 3543 		goto out;
 3544 	}
 3545 
 3546 	if (f2fs_pin_file_control(inode, false)) {
 3547 		ret = -EAGAIN;
 3548 		goto out;
 3549 	}
 3550 
 3551 	ret = f2fs_convert_inline_inode(inode);
 3552 	if (ret)
 3553 		goto out;
 3554 
 3555 	if (!f2fs_disable_compressed_file(inode)) {
 3556 		ret = -EOPNOTSUPP;
 3557 		goto out;
 3558 	}
 3559 
 3560 	set_inode_flag(inode, FI_PIN_FILE);
 3561 	ret = F2FS_I(inode)->i_gc_failures;
 3562 done:
 3563 	f2fs_update_time(sbi, REQ_TIME);
 3564 out:
 3565 	inode_unlock(inode);
 3566 	mnt_drop_write_file(filp);
 3567 	return ret;
 3568 }
 3569 
 3570 static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
 3571 {
 3572 	struct inode *inode = file_inode(filp);
 3573 	__u32 pin = 0;
 3574 
 3575 	if (is_inode_flag_set(inode, FI_PIN_FILE))
 3576 		pin = F2FS_I(inode)->i_gc_failures;
 3577 	return put_user(pin, (u32 __user *)arg);
 3578 }
 3579 
 3580 static int f2fs_ioc_get_dev_alias_file(struct file *filp, unsigned long arg)
 3581 {
 3582 	return put_user(IS_DEVICE_ALIASING(file_inode(filp)) ? 1 : 0,
 3583 			(u32 __user *)arg);
 3584 }
 3585 
 3586 static int f2fs_ioc_io_prio(struct file *filp, unsigned long arg)
 3587 {
 3588 	struct inode *inode = file_inode(filp);
 3589 	__u32 level;
 3590 
 3591 	if (get_user(level, (__u32 __user *)arg))
 3592 		return -EFAULT;
 3593 
 3594 	if (!S_ISREG(inode->i_mode) || level >= F2FS_IOPRIO_MAX)
 3595 		return -EINVAL;
 3596 
 3597 	inode_lock(inode);
 3598 	F2FS_I(inode)->ioprio_hint = level;
 3599 	inode_unlock(inode);
 3600 	return 0;
 3601 }
 3602 
 3603 int f2fs_precache_extents(struct inode *inode)
 3604 {
 3605 	struct f2fs_inode_info *fi = F2FS_I(inode);
 3606 	struct f2fs_map_blocks map;
 3607 	pgoff_t m_next_extent;
 3608 	loff_t end;
 3609 	int err;
 3610 
 3611 	if (is_inode_flag_set(inode, FI_NO_EXTENT))
 3612 		return -EOPNOTSUPP;
 3613 
 3614 	map.m_lblk = 0;
 3615 	map.m_pblk = 0;
 3616 	map.m_next_pgofs = NULL;
 3617 	map.m_next_extent = &m_next_extent;
 3618 	map.m_seg_type = NO_CHECK_TYPE;
 3619 	map.m_may_create = false;
 3620 	end = F2FS_BLK_ALIGN(i_size_read(inode));
 3621 
 3622 	while (map.m_lblk < end) {
 3623 		map.m_len = end - map.m_lblk;
 3624 
 3625 		f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 3626 		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
 3627 		f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
 3628 		if (err || !map.m_len)
 3629 			return err;
 3630 
 3631 		map.m_lblk = m_next_extent;
 3632 	}
 3633 
 3634 	return 0;
 3635 }
 3636 
 3637 static int f2fs_ioc_precache_extents(struct file *filp)
 3638 {
 3639 	return f2fs_precache_extents(file_inode(filp));
 3640 }
 3641 
 3642 static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
 3643 {
 3644 	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
 3645 	__u64 block_count;
 3646 
 3647 	if (!capable(CAP_SYS_ADMIN))
 3648 		return -EPERM;
 3649 
 3650 	if (f2fs_readonly(sbi->sb))
 3651 		return -EROFS;
 3652 
 3653 	if (copy_from_user(&block_count, (void __user *)arg,
 3654 			   sizeof(block_count)))
 3655 		return -EFAULT;
 3656 
 3657 	return f2fs_resize_fs(filp, block_count);
 3658 }
 3659 
 3660 static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg)
 3661 {
 3662 	struct inode *inode = file_inode(filp);
 3663 
 3664 	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 3665 
 3666 	if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) {
 3667 		f2fs_warn(F2FS_I_SB(inode),
 3668 			  "Can't enable fs-verity on inode %lu: the verity feature is not enabled on this filesystem",
 3669 			  inode->i_ino);
 3670 		return -EOPNOTSUPP;
 3671 	}
 3672 
 3673 	return fsverity_ioctl_enable(filp, (const void __user *)arg);
 3674 }
 3675 
 3676 static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg)
 3677 {
 3678 	if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
 3679 		return -EOPNOTSUPP;
 3680 
 3681 	return fsverity_ioctl_measure(filp, (void __user *)arg);
 3682 }
 3683 
 3684 static int f2fs_ioc_read_verity_metadata(struct file *filp, unsigned long arg)
 3685 {
 3686 	if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
 3687 		return -EOPNOTSUPP;
 3688 
 3689 	return fsverity_ioctl_read_metadata(filp, (const void __user *)arg);
 3690 }
 3691 
 3692 static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg)
 3693 {
 3694 	struct inode *inode = file_inode(filp);
 3695 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3696 	char *vbuf;
 3697 	int count;
 3698 	int err = 0;
 3699 
 3700 	vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL);
 3701 	if (!vbuf)
 3702 		return -ENOMEM;
 3703 
 3704 	f2fs_down_read(&sbi->sb_lock);
 3705 	count = utf16s_to_utf8s(sbi->raw_super->volume_name,
 3706 			ARRAY_SIZE(sbi->raw_super->volume_name),
 3707 			UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME);
 3708 	f2fs_up_read(&sbi->sb_lock);
 3709 
 3710 	if (copy_to_user((char __user *)arg, vbuf,
 3711 				min(FSLABEL_MAX, count)))
 3712 		err = -EFAULT;
 3713 
 3714 	kfree(vbuf);
 3715 	return err;
 3716 }
 3717 
 3718 static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg)
 3719 {
 3720 	struct inode *inode = file_inode(filp);
 3721 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3722 	char *vbuf;
 3723 	int err = 0;
 3724 
 3725 	if (!capable(CAP_SYS_ADMIN))
 3726 		return -EPERM;
 3727 
 3728 	vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX);
 3729 	if (IS_ERR(vbuf))
 3730 		return PTR_ERR(vbuf);
 3731 
 3732 	err = mnt_want_write_file(filp);
 3733 	if (err)
 3734 		goto out;
 3735 
 3736 	f2fs_down_write(&sbi->sb_lock);
 3737 
 3738 	memset(sbi->raw_super->volume_name, 0,
 3739 			sizeof(sbi->raw_super->volume_name));
 3740 	utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN,
 3741 			sbi->raw_super->volume_name,
 3742 			ARRAY_SIZE(sbi->raw_super->volume_name));
 3743 
 3744 	err = f2fs_commit_super(sbi, false);
 3745 
 3746 	f2fs_up_write(&sbi->sb_lock);
 3747 
 3748 	mnt_drop_write_file(filp);
 3749 out:
 3750 	kfree(vbuf);
 3751 	return err;
 3752 }
 3753 
 3754 static int f2fs_get_compress_blocks(struct inode *inode, __u64 *blocks)
 3755 {
 3756 	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
 3757 		return -EOPNOTSUPP;
 3758 
 3759 	if (!f2fs_compressed_file(inode))
 3760 		return -EINVAL;
 3761 
 3762 	*blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);
 3763 
 3764 	return 0;
 3765 }
 3766 
 3767 static int f2fs_ioc_get_compress_blocks(struct file *filp, unsigned long arg)
 3768 {
 3769 	struct inode *inode = file_inode(filp);
 3770 	__u64 blocks;
 3771 	int ret;
 3772 
 3773 	ret = f2fs_get_compress_blocks(inode, &blocks);
 3774 	if (ret < 0)
 3775 		return ret;
 3776 
 3777 	return put_user(blocks, (u64 __user *)arg);
 3778 }
 3779 
 3780 static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
 3781 {
 3782 	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
 3783 	unsigned int released_blocks = 0;
 3784 	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
 3785 	block_t blkaddr;
 3786 	int i;
 3787 
 3788 	for (i = 0; i < count; i++) {
 3789 		blkaddr = data_blkaddr(dn->inode, dn->node_folio,
 3790 						dn->ofs_in_node + i);
 3791 
 3792 		if (!__is_valid_data_blkaddr(blkaddr))
 3793 			continue;
 3794 		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
 3795 					DATA_GENERIC_ENHANCE)))
 3796 			return -EFSCORRUPTED;
 3797 	}
 3798 
 3799 	while (count) {
 3800 		int compr_blocks = 0;
 3801 
 3802 		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
 3803 			blkaddr = f2fs_data_blkaddr(dn);
 3804 
 3805 			if (i == 0) {
 3806 				if (blkaddr == COMPRESS_ADDR)
 3807 					continue;
 3808 				dn->ofs_in_node += cluster_size;
 3809 				goto next;
 3810 			}
 3811 
 3812 			if (__is_valid_data_blkaddr(blkaddr))
 3813 				compr_blocks++;
 3814 
 3815 			if (blkaddr != NEW_ADDR)
 3816 				continue;
 3817 
 3818 			f2fs_set_data_blkaddr(dn, NULL_ADDR);
 3819 		}
 3820 
 3821 		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false);
 3822 		dec_valid_block_count(sbi, dn->inode,
 3823 					cluster_size - compr_blocks);
 3824 
 3825 		released_blocks += cluster_size - compr_blocks;
 3826 next:
 3827 		count -= cluster_size;
 3828 	}
 3829 
 3830 	return released_blocks;
 3831 }
 3832 
 3833 static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
 3834 {
 3835 	struct inode *inode = file_inode(filp);
 3836 	struct f2fs_inode_info *fi = F2FS_I(inode);
 3837 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 3838 	pgoff_t page_idx = 0, last_idx;
 3839 	unsigned int released_blocks = 0;
 3840 	int ret;
 3841 	int writecount;
 3842 
 3843 	if (!f2fs_sb_has_compression(sbi))
 3844 		return -EOPNOTSUPP;
 3845 
 3846 	if (f2fs_readonly(sbi->sb))
 3847 		return -EROFS;
 3848 
 3849 	ret = mnt_want_write_file(filp);
 3850 	if (ret)
 3851 		return ret;
 3852 
 3853 	f2fs_balance_fs(sbi, true);
 3854 
 3855 	inode_lock(inode);
 3856 
 3857 	writecount = atomic_read(&inode->i_writecount);
 3858 	if ((filp->f_mode & FMODE_WRITE && writecount != 1) ||
 3859 			(!(filp->f_mode & FMODE_WRITE) && writecount)) {
 3860 		ret = -EBUSY;
 3861 		goto out;
 3862 	}
 3863 
 3864 	if (!f2fs_compressed_file(inode) ||
 3865 		is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
 3866 		ret = -EINVAL;
 3867 		goto out;
 3868 	}
 3869 
 3870 	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
 3871 	if (ret)
 3872 		goto out;
 3873 
 3874 	if (!atomic_read(&fi->i_compr_blocks)) {
 3875 		ret = -EPERM;
 3876 		goto out;
 3877 	}
 3878 
 3879 	set_inode_flag(inode, FI_COMPRESS_RELEASED);
 3880 	inode_set_ctime_current(inode);
 3881 	f2fs_mark_inode_dirty_sync(inode, true);
 3882 
 3883 	f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 3884 	filemap_invalidate_lock(inode->i_mapping);
 3885 
 3886 	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 3887 
 3888 	while (page_idx < last_idx) {
 3889 		struct dnode_of_data dn;
 3890 		pgoff_t end_offset, count;
 3891 
 3892 		f2fs_lock_op(sbi);
 3893 
 3894 		set_new_dnode(&dn, inode, NULL, NULL, 0);
 3895 		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
 3896 		if (ret) {
 3897 			f2fs_unlock_op(sbi);
 3898 			if (ret == -ENOENT) {
 3899 				page_idx = f2fs_get_next_page_offset(&dn,
 3900 								page_idx);
 3901 				ret = 0;
 3902 				continue;
 3903 			}
 3904 			break;
 3905 		}
 3906 
 3907 		end_offset = ADDRS_PER_PAGE(dn.node_folio, inode);
 3908 		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
 3909 		count = round_up(count, fi->i_cluster_size);
 3910 
 3911 		ret = release_compress_blocks(&dn, count);
 3912 
 3913 		f2fs_put_dnode(&dn);
 3914 
 3915 		f2fs_unlock_op(sbi);
 3916 
 3917 		if (ret < 0)
 3918 			break;
 3919 
 3920 		page_idx += count;
 3921 		released_blocks += ret;
 3922 	}
 3923 
 3924 	filemap_invalidate_unlock(inode->i_mapping);
 3925 	f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
 3926 out:
 3927 	if (released_blocks)
 3928 		f2fs_update_time(sbi, REQ_TIME);
 3929 	inode_unlock(inode);
 3930 
 3931 	mnt_drop_write_file(filp);
 3932 
 3933 	if (ret >= 0) {
 3934 		ret = put_user(released_blocks, (u64 __user *)arg);
 3935 	} else if (released_blocks &&
 3936 			atomic_read(&fi->i_compr_blocks)) {
 3937 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 3938 		f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
 3939 			"iblocks=%llu, released=%u, compr_blocks=%u, "
 3940 			"run fsck to fix.",
 3941 			__func__, inode->i_ino, inode->i_blocks,
 3942 			released_blocks,
 3943 			atomic_read(&fi->i_compr_blocks));
 3944 	}
 3945 
 3946 	return ret;
 3947 }
 3948 
 3949 static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count,
 3950 		unsigned int *reserved_blocks)
 3951 {
 3952 	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
 3953 	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
 3954 	block_t blkaddr;
 3955 	int i;
 3956 
 3957 	for (i = 0; i < count; i++) {
 3958 		blkaddr = data_blkaddr(dn->inode, dn->node_folio,
 3959 						dn->ofs_in_node + i);
 3960 
 3961 		if (!__is_valid_data_blkaddr(blkaddr))
 3962 			continue;
 3963 		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
 3964 					DATA_GENERIC_ENHANCE)))
 3965 			return -EFSCORRUPTED;
 3966 	}
 3967 
 3968 	while (count) {
 3969 		int compr_blocks = 0;
 3970 		blkcnt_t reserved = 0;
 3971 		blkcnt_t to_reserved;
 3972 		int ret;
 3973 
 3974 		for (i = 0; i < cluster_size; i++) {
 3975 			blkaddr = data_blkaddr(dn->inode, dn->node_folio,
 3976 						dn->ofs_in_node + i);
 3977 
 3978 			if (i == 0) {
 3979 				if (blkaddr != COMPRESS_ADDR) {
 3980 					dn->ofs_in_node += cluster_size;
 3981 					goto next;
 3982 				}
 3983 				continue;
 3984 			}
 3985 
 3986 			/*
 3987 			 * compressed cluster was not released due to it
 3988 			 * fails in release_compress_blocks(), so NEW_ADDR
 3989 			 * is a possible case.
 3990 			 */
 3991 			if (blkaddr == NEW_ADDR) {
 3992 				reserved++;
 3993 				continue;
 3994 			}
 3995 			if (__is_valid_data_blkaddr(blkaddr)) {
 3996 				compr_blocks++;
 3997 				continue;
 3998 			}
 3999 		}
 4000 
 4001 		to_reserved = cluster_size - compr_blocks - reserved;
 4002 
 4003 		/* for the case all blocks in cluster were reserved */
 4004 		if (reserved && to_reserved == 1) {
 4005 			dn->ofs_in_node += cluster_size;
 4006 			goto next;
 4007 		}
 4008 
 4009 		ret = inc_valid_block_count(sbi, dn->inode,
 4010 						&to_reserved, false);
 4011 		if (unlikely(ret))
 4012 			return ret;
 4013 
 4014 		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
 4015 			if (f2fs_data_blkaddr(dn) == NULL_ADDR)
 4016 				f2fs_set_data_blkaddr(dn, NEW_ADDR);
 4017 		}
 4018 
 4019 		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);
 4020 
 4021 		*reserved_blocks += to_reserved;
 4022 next:
 4023 		count -= cluster_size;
 4024 	}
 4025 
 4026 	return 0;
 4027 }
 4028 
 4029 static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
 4030 {
 4031 	struct inode *inode = file_inode(filp);
 4032 	struct f2fs_inode_info *fi = F2FS_I(inode);
 4033 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4034 	pgoff_t page_idx = 0, last_idx;
 4035 	unsigned int reserved_blocks = 0;
 4036 	int ret;
 4037 
 4038 	if (!f2fs_sb_has_compression(sbi))
 4039 		return -EOPNOTSUPP;
 4040 
 4041 	if (f2fs_readonly(sbi->sb))
 4042 		return -EROFS;
 4043 
 4044 	ret = mnt_want_write_file(filp);
 4045 	if (ret)
 4046 		return ret;
 4047 
 4048 	f2fs_balance_fs(sbi, true);
 4049 
 4050 	inode_lock(inode);
 4051 
 4052 	if (!f2fs_compressed_file(inode) ||
 4053 		!is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
 4054 		ret = -EINVAL;
 4055 		goto unlock_inode;
 4056 	}
 4057 
 4058 	if (atomic_read(&fi->i_compr_blocks))
 4059 		goto unlock_inode;
 4060 
 4061 	f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 4062 	filemap_invalidate_lock(inode->i_mapping);
 4063 
 4064 	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 4065 
 4066 	while (page_idx < last_idx) {
 4067 		struct dnode_of_data dn;
 4068 		pgoff_t end_offset, count;
 4069 
 4070 		f2fs_lock_op(sbi);
 4071 
 4072 		set_new_dnode(&dn, inode, NULL, NULL, 0);
 4073 		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
 4074 		if (ret) {
 4075 			f2fs_unlock_op(sbi);
 4076 			if (ret == -ENOENT) {
 4077 				page_idx = f2fs_get_next_page_offset(&dn,
 4078 								page_idx);
 4079 				ret = 0;
 4080 				continue;
 4081 			}
 4082 			break;
 4083 		}
 4084 
 4085 		end_offset = ADDRS_PER_PAGE(dn.node_folio, inode);
 4086 		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
 4087 		count = round_up(count, fi->i_cluster_size);
 4088 
 4089 		ret = reserve_compress_blocks(&dn, count, &reserved_blocks);
 4090 
 4091 		f2fs_put_dnode(&dn);
 4092 
 4093 		f2fs_unlock_op(sbi);
 4094 
 4095 		if (ret < 0)
 4096 			break;
 4097 
 4098 		page_idx += count;
 4099 	}
 4100 
 4101 	filemap_invalidate_unlock(inode->i_mapping);
 4102 	f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
 4103 
 4104 	if (!ret) {
 4105 		clear_inode_flag(inode, FI_COMPRESS_RELEASED);
 4106 		inode_set_ctime_current(inode);
 4107 		f2fs_mark_inode_dirty_sync(inode, true);
 4108 	}
 4109 unlock_inode:
 4110 	if (reserved_blocks)
 4111 		f2fs_update_time(sbi, REQ_TIME);
 4112 	inode_unlock(inode);
 4113 	mnt_drop_write_file(filp);
 4114 
 4115 	if (!ret) {
 4116 		ret = put_user(reserved_blocks, (u64 __user *)arg);
 4117 	} else if (reserved_blocks &&
 4118 			atomic_read(&fi->i_compr_blocks)) {
 4119 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 4120 		f2fs_warn(sbi, "%s: partial blocks were reserved i_ino=%lx "
 4121 			"iblocks=%llu, reserved=%u, compr_blocks=%u, "
 4122 			"run fsck to fix.",
 4123 			__func__, inode->i_ino, inode->i_blocks,
 4124 			reserved_blocks,
 4125 			atomic_read(&fi->i_compr_blocks));
 4126 	}
 4127 
 4128 	return ret;
 4129 }
 4130 
 4131 static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode,
 4132 		pgoff_t off, block_t block, block_t len, u32 flags)
 4133 {
 4134 	sector_t sector = SECTOR_FROM_BLOCK(block);
 4135 	sector_t nr_sects = SECTOR_FROM_BLOCK(len);
 4136 	int ret = 0;
 4137 
 4138 	if (flags & F2FS_TRIM_FILE_DISCARD) {
 4139 		if (bdev_max_secure_erase_sectors(bdev))
 4140 			ret = blkdev_issue_secure_erase(bdev, sector, nr_sects,
 4141 					GFP_NOFS);
 4142 		else
 4143 			ret = blkdev_issue_discard(bdev, sector, nr_sects,
 4144 					GFP_NOFS);
 4145 	}
 4146 
 4147 	if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) {
 4148 		if (IS_ENCRYPTED(inode))
 4149 			ret = fscrypt_zeroout_range(inode, off, block, len);
 4150 		else
 4151 			ret = blkdev_issue_zeroout(bdev, sector, nr_sects,
 4152 					GFP_NOFS, 0);
 4153 	}
 4154 
 4155 	return ret;
 4156 }
 4157 
 4158 static int f2fs_sec_trim_file(struct file *filp, unsigned long arg)
 4159 {
 4160 	struct inode *inode = file_inode(filp);
 4161 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4162 	struct address_space *mapping = inode->i_mapping;
 4163 	struct block_device *prev_bdev = NULL;
 4164 	struct f2fs_sectrim_range range;
 4165 	pgoff_t index, pg_end, prev_index = 0;
 4166 	block_t prev_block = 0, len = 0;
 4167 	loff_t end_addr;
 4168 	bool to_end = false;
 4169 	int ret = 0;
 4170 
 4171 	if (!(filp->f_mode & FMODE_WRITE))
 4172 		return -EBADF;
 4173 
 4174 	if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg,
 4175 				sizeof(range)))
 4176 		return -EFAULT;
 4177 
 4178 	if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) ||
 4179 			!S_ISREG(inode->i_mode))
 4180 		return -EINVAL;
 4181 
 4182 	if (((range.flags & F2FS_TRIM_FILE_DISCARD) &&
 4183 			!f2fs_hw_support_discard(sbi)) ||
 4184 			((range.flags & F2FS_TRIM_FILE_ZEROOUT) &&
 4185 			 IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi)))
 4186 		return -EOPNOTSUPP;
 4187 
 4188 	ret = mnt_want_write_file(filp);
 4189 	if (ret)
 4190 		return ret;
 4191 	inode_lock(inode);
 4192 
 4193 	if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) ||
 4194 			range.start >= inode->i_size) {
 4195 		ret = -EINVAL;
 4196 		goto err;
 4197 	}
 4198 
 4199 	if (range.len == 0)
 4200 		goto err;
 4201 
 4202 	if (inode->i_size - range.start > range.len) {
 4203 		end_addr = range.start + range.len;
 4204 	} else {
 4205 		end_addr = range.len == (u64)-1 ?
 4206 			sbi->sb->s_maxbytes : inode->i_size;
 4207 		to_end = true;
 4208 	}
 4209 
 4210 	if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) ||
 4211 			(!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) {
 4212 		ret = -EINVAL;
 4213 		goto err;
 4214 	}
 4215 
 4216 	index = F2FS_BYTES_TO_BLK(range.start);
 4217 	pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE);
 4218 
 4219 	ret = f2fs_convert_inline_inode(inode);
 4220 	if (ret)
 4221 		goto err;
 4222 
 4223 	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 4224 	filemap_invalidate_lock(mapping);
 4225 
 4226 	ret = filemap_write_and_wait_range(mapping, range.start,
 4227 			to_end ? LLONG_MAX : end_addr - 1);
 4228 	if (ret)
 4229 		goto out;
 4230 
 4231 	truncate_inode_pages_range(mapping, range.start,
 4232 			to_end ? -1 : end_addr - 1);
 4233 
 4234 	while (index < pg_end) {
 4235 		struct dnode_of_data dn;
 4236 		pgoff_t end_offset, count;
 4237 		int i;
 4238 
 4239 		set_new_dnode(&dn, inode, NULL, NULL, 0);
 4240 		ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
 4241 		if (ret) {
 4242 			if (ret == -ENOENT) {
 4243 				index = f2fs_get_next_page_offset(&dn, index);
 4244 				continue;
 4245 			}
 4246 			goto out;
 4247 		}
 4248 
 4249 		end_offset = ADDRS_PER_PAGE(dn.node_folio, inode);
 4250 		count = min(end_offset - dn.ofs_in_node, pg_end - index);
 4251 		for (i = 0; i < count; i++, index++, dn.ofs_in_node++) {
 4252 			struct block_device *cur_bdev;
 4253 			block_t blkaddr = f2fs_data_blkaddr(&dn);
 4254 
 4255 			if (!__is_valid_data_blkaddr(blkaddr))
 4256 				continue;
 4257 
 4258 			if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
 4259 						DATA_GENERIC_ENHANCE)) {
 4260 				ret = -EFSCORRUPTED;
 4261 				f2fs_put_dnode(&dn);
 4262 				goto out;
 4263 			}
 4264 
 4265 			cur_bdev = f2fs_target_device(sbi, blkaddr, NULL);
 4266 			if (f2fs_is_multi_device(sbi)) {
 4267 				int di = f2fs_target_device_index(sbi, blkaddr);
 4268 
 4269 				blkaddr -= FDEV(di).start_blk;
 4270 			}
 4271 
 4272 			if (len) {
 4273 				if (prev_bdev == cur_bdev &&
 4274 						index == prev_index + len &&
 4275 						blkaddr == prev_block + len) {
 4276 					len++;
 4277 				} else {
 4278 					ret = f2fs_secure_erase(prev_bdev,
 4279 						inode, prev_index, prev_block,
 4280 						len, range.flags);
 4281 					if (ret) {
 4282 						f2fs_put_dnode(&dn);
 4283 						goto out;
 4284 					}
 4285 
 4286 					len = 0;
 4287 				}
 4288 			}
 4289 
 4290 			if (!len) {
 4291 				prev_bdev = cur_bdev;
 4292 				prev_index = index;
 4293 				prev_block = blkaddr;
 4294 				len = 1;
 4295 			}
 4296 		}
 4297 
 4298 		f2fs_put_dnode(&dn);
 4299 
 4300 		if (fatal_signal_pending(current)) {
 4301 			ret = -EINTR;
 4302 			goto out;
 4303 		}
 4304 		cond_resched();
 4305 	}
 4306 
 4307 	if (len)
 4308 		ret = f2fs_secure_erase(prev_bdev, inode, prev_index,
 4309 				prev_block, len, range.flags);
 4310 	f2fs_update_time(sbi, REQ_TIME);
 4311 out:
 4312 	filemap_invalidate_unlock(mapping);
 4313 	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 4314 err:
 4315 	inode_unlock(inode);
 4316 	mnt_drop_write_file(filp);
 4317 
 4318 	return ret;
 4319 }
 4320 
 4321 static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
 4322 {
 4323 	struct inode *inode = file_inode(filp);
 4324 	struct f2fs_comp_option option;
 4325 
 4326 	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
 4327 		return -EOPNOTSUPP;
 4328 
 4329 	inode_lock_shared(inode);
 4330 
 4331 	if (!f2fs_compressed_file(inode)) {
 4332 		inode_unlock_shared(inode);
 4333 		return -ENODATA;
 4334 	}
 4335 
 4336 	option.algorithm = F2FS_I(inode)->i_compress_algorithm;
 4337 	option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size;
 4338 
 4339 	inode_unlock_shared(inode);
 4340 
 4341 	if (copy_to_user((struct f2fs_comp_option __user *)arg, &option,
 4342 				sizeof(option)))
 4343 		return -EFAULT;
 4344 
 4345 	return 0;
 4346 }
 4347 
 4348 static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
 4349 {
 4350 	struct inode *inode = file_inode(filp);
 4351 	struct f2fs_inode_info *fi = F2FS_I(inode);
 4352 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4353 	struct f2fs_comp_option option;
 4354 	int ret = 0;
 4355 
 4356 	if (!f2fs_sb_has_compression(sbi))
 4357 		return -EOPNOTSUPP;
 4358 
 4359 	if (!(filp->f_mode & FMODE_WRITE))
 4360 		return -EBADF;
 4361 
 4362 	if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg,
 4363 				sizeof(option)))
 4364 		return -EFAULT;
 4365 
 4366 	if (option.log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
 4367 		option.log_cluster_size > MAX_COMPRESS_LOG_SIZE ||
 4368 		option.algorithm >= COMPRESS_MAX)
 4369 		return -EINVAL;
 4370 
 4371 	ret = mnt_want_write_file(filp);
 4372 	if (ret)
 4373 		return ret;
 4374 	inode_lock(inode);
 4375 
 4376 	f2fs_down_write(&F2FS_I(inode)->i_sem);
 4377 	if (!f2fs_compressed_file(inode)) {
 4378 		ret = -EINVAL;
 4379 		goto out;
 4380 	}
 4381 
 4382 	if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) {
 4383 		ret = -EBUSY;
 4384 		goto out;
 4385 	}
 4386 
 4387 	if (F2FS_HAS_BLOCKS(inode)) {
 4388 		ret = -EFBIG;
 4389 		goto out;
 4390 	}
 4391 
 4392 	fi->i_compress_algorithm = option.algorithm;
 4393 	fi->i_log_cluster_size = option.log_cluster_size;
 4394 	fi->i_cluster_size = BIT(option.log_cluster_size);
 4395 	/* Set default level */
 4396 	if (fi->i_compress_algorithm == COMPRESS_ZSTD)
 4397 		fi->i_compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
 4398 	else
 4399 		fi->i_compress_level = 0;
 4400 	/* Adjust mount option level */
 4401 	if (option.algorithm == F2FS_OPTION(sbi).compress_algorithm &&
 4402 	    F2FS_OPTION(sbi).compress_level)
 4403 		fi->i_compress_level = F2FS_OPTION(sbi).compress_level;
 4404 	f2fs_mark_inode_dirty_sync(inode, true);
 4405 
 4406 	if (!f2fs_is_compress_backend_ready(inode))
 4407 		f2fs_warn(sbi, "compression algorithm is successfully set, "
 4408 			"but current kernel doesn't support this algorithm.");
 4409 out:
 4410 	f2fs_up_write(&fi->i_sem);
 4411 	inode_unlock(inode);
 4412 	mnt_drop_write_file(filp);
 4413 
 4414 	return ret;
 4415 }
 4416 
 4417 static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len)
 4418 {
 4419 	DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx);
 4420 	struct address_space *mapping = inode->i_mapping;
 4421 	struct folio *folio;
 4422 	pgoff_t redirty_idx = page_idx;
 4423 	int page_len = 0, ret = 0;
 4424 
 4425 	page_cache_ra_unbounded(&ractl, len, 0);
 4426 
 4427 	do {
 4428 		folio = read_cache_folio(mapping, page_idx, NULL, NULL);
 4429 		if (IS_ERR(folio)) {
 4430 			ret = PTR_ERR(folio);
 4431 			break;
 4432 		}
 4433 		page_len += folio_nr_pages(folio) - (page_idx - folio->index);
 4434 		page_idx = folio_next_index(folio);
 4435 	} while (page_len < len);
 4436 
 4437 	do {
 4438 		folio = filemap_lock_folio(mapping, redirty_idx);
 4439 
 4440 		/* It will never fail, when folio has pinned above */
 4441 		f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(folio));
 4442 
 4443 		f2fs_folio_wait_writeback(folio, DATA, true, true);
 4444 
 4445 		folio_mark_dirty(folio);
 4446 		folio_set_f2fs_gcing(folio);
 4447 		redirty_idx = folio_next_index(folio);
 4448 		folio_unlock(folio);
 4449 		folio_put_refs(folio, 2);
 4450 	} while (redirty_idx < page_idx);
 4451 
 4452 	return ret;
 4453 }
 4454 
 4455 static int f2fs_ioc_decompress_file(struct file *filp)
 4456 {
 4457 	struct inode *inode = file_inode(filp);
 4458 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4459 	struct f2fs_inode_info *fi = F2FS_I(inode);
 4460 	pgoff_t page_idx = 0, last_idx, cluster_idx;
 4461 	int ret;
 4462 
 4463 	if (!f2fs_sb_has_compression(sbi) ||
 4464 			F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)
 4465 		return -EOPNOTSUPP;
 4466 
 4467 	if (!(filp->f_mode & FMODE_WRITE))
 4468 		return -EBADF;
 4469 
 4470 	f2fs_balance_fs(sbi, true);
 4471 
 4472 	ret = mnt_want_write_file(filp);
 4473 	if (ret)
 4474 		return ret;
 4475 	inode_lock(inode);
 4476 
 4477 	if (!f2fs_is_compress_backend_ready(inode)) {
 4478 		ret = -EOPNOTSUPP;
 4479 		goto out;
 4480 	}
 4481 
 4482 	if (!f2fs_compressed_file(inode) ||
 4483 		is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
 4484 		ret = -EINVAL;
 4485 		goto out;
 4486 	}
 4487 
 4488 	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
 4489 	if (ret)
 4490 		goto out;
 4491 
 4492 	if (!atomic_read(&fi->i_compr_blocks))
 4493 		goto out;
 4494 
 4495 	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 4496 	last_idx >>= fi->i_log_cluster_size;
 4497 
 4498 	for (cluster_idx = 0; cluster_idx < last_idx; cluster_idx++) {
 4499 		page_idx = cluster_idx << fi->i_log_cluster_size;
 4500 
 4501 		if (!f2fs_is_compressed_cluster(inode, page_idx))
 4502 			continue;
 4503 
 4504 		ret = redirty_blocks(inode, page_idx, fi->i_cluster_size);
 4505 		if (ret < 0)
 4506 			break;
 4507 
 4508 		if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) {
 4509 			ret = filemap_fdatawrite(inode->i_mapping);
 4510 			if (ret < 0)
 4511 				break;
 4512 		}
 4513 
 4514 		cond_resched();
 4515 		if (fatal_signal_pending(current)) {
 4516 			ret = -EINTR;
 4517 			break;
 4518 		}
 4519 	}
 4520 
 4521 	if (!ret)
 4522 		ret = filemap_write_and_wait_range(inode->i_mapping, 0,
 4523 							LLONG_MAX);
 4524 
 4525 	if (ret)
 4526 		f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.",
 4527 			  __func__, ret);
 4528 	f2fs_update_time(sbi, REQ_TIME);
 4529 out:
 4530 	inode_unlock(inode);
 4531 	mnt_drop_write_file(filp);
 4532 
 4533 	return ret;
 4534 }
 4535 
 4536 static int f2fs_ioc_compress_file(struct file *filp)
 4537 {
 4538 	struct inode *inode = file_inode(filp);
 4539 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4540 	struct f2fs_inode_info *fi = F2FS_I(inode);
 4541 	pgoff_t page_idx = 0, last_idx, cluster_idx;
 4542 	int ret;
 4543 
 4544 	if (!f2fs_sb_has_compression(sbi) ||
 4545 			F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)
 4546 		return -EOPNOTSUPP;
 4547 
 4548 	if (!(filp->f_mode & FMODE_WRITE))
 4549 		return -EBADF;
 4550 
 4551 	f2fs_balance_fs(sbi, true);
 4552 
 4553 	ret = mnt_want_write_file(filp);
 4554 	if (ret)
 4555 		return ret;
 4556 	inode_lock(inode);
 4557 
 4558 	if (!f2fs_is_compress_backend_ready(inode)) {
 4559 		ret = -EOPNOTSUPP;
 4560 		goto out;
 4561 	}
 4562 
 4563 	if (!f2fs_compressed_file(inode) ||
 4564 		is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
 4565 		ret = -EINVAL;
 4566 		goto out;
 4567 	}
 4568 
 4569 	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
 4570 	if (ret)
 4571 		goto out;
 4572 
 4573 	set_inode_flag(inode, FI_ENABLE_COMPRESS);
 4574 
 4575 	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 4576 	last_idx >>= fi->i_log_cluster_size;
 4577 
 4578 	for (cluster_idx = 0; cluster_idx < last_idx; cluster_idx++) {
 4579 		page_idx = cluster_idx << fi->i_log_cluster_size;
 4580 
 4581 		if (f2fs_is_sparse_cluster(inode, page_idx))
 4582 			continue;
 4583 
 4584 		ret = redirty_blocks(inode, page_idx, fi->i_cluster_size);
 4585 		if (ret < 0)
 4586 			break;
 4587 
 4588 		if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) {
 4589 			ret = filemap_fdatawrite(inode->i_mapping);
 4590 			if (ret < 0)
 4591 				break;
 4592 		}
 4593 
 4594 		cond_resched();
 4595 		if (fatal_signal_pending(current)) {
 4596 			ret = -EINTR;
 4597 			break;
 4598 		}
 4599 	}
 4600 
 4601 	if (!ret)
 4602 		ret = filemap_write_and_wait_range(inode->i_mapping, 0,
 4603 							LLONG_MAX);
 4604 
 4605 	clear_inode_flag(inode, FI_ENABLE_COMPRESS);
 4606 
 4607 	if (ret)
 4608 		f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.",
 4609 			  __func__, ret);
 4610 	f2fs_update_time(sbi, REQ_TIME);
 4611 out:
 4612 	inode_unlock(inode);
 4613 	mnt_drop_write_file(filp);
 4614 
 4615 	return ret;
 4616 }
 4617 
 4618 static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 4619 {
 4620 	switch (cmd) {
 4621 	case FS_IOC_GETVERSION:
 4622 		return f2fs_ioc_getversion(filp, arg);
 4623 	case F2FS_IOC_START_ATOMIC_WRITE:
 4624 		return f2fs_ioc_start_atomic_write(filp, false);
 4625 	case F2FS_IOC_START_ATOMIC_REPLACE:
 4626 		return f2fs_ioc_start_atomic_write(filp, true);
 4627 	case F2FS_IOC_COMMIT_ATOMIC_WRITE:
 4628 		return f2fs_ioc_commit_atomic_write(filp);
 4629 	case F2FS_IOC_ABORT_ATOMIC_WRITE:
 4630 		return f2fs_ioc_abort_atomic_write(filp);
 4631 	case F2FS_IOC_START_VOLATILE_WRITE:
 4632 	case F2FS_IOC_RELEASE_VOLATILE_WRITE:
 4633 		return -EOPNOTSUPP;
 4634 	case F2FS_IOC_SHUTDOWN:
 4635 		return f2fs_ioc_shutdown(filp, arg);
 4636 	case FITRIM:
 4637 		return f2fs_ioc_fitrim(filp, arg);
 4638 	case FS_IOC_SET_ENCRYPTION_POLICY:
 4639 		return f2fs_ioc_set_encryption_policy(filp, arg);
 4640 	case FS_IOC_GET_ENCRYPTION_POLICY:
 4641 		return f2fs_ioc_get_encryption_policy(filp, arg);
 4642 	case FS_IOC_GET_ENCRYPTION_PWSALT:
 4643 		return f2fs_ioc_get_encryption_pwsalt(filp, arg);
 4644 	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
 4645 		return f2fs_ioc_get_encryption_policy_ex(filp, arg);
 4646 	case FS_IOC_ADD_ENCRYPTION_KEY:
 4647 		return f2fs_ioc_add_encryption_key(filp, arg);
 4648 	case FS_IOC_REMOVE_ENCRYPTION_KEY:
 4649 		return f2fs_ioc_remove_encryption_key(filp, arg);
 4650 	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
 4651 		return f2fs_ioc_remove_encryption_key_all_users(filp, arg);
 4652 	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
 4653 		return f2fs_ioc_get_encryption_key_status(filp, arg);
 4654 	case FS_IOC_GET_ENCRYPTION_NONCE:
 4655 		return f2fs_ioc_get_encryption_nonce(filp, arg);
 4656 	case F2FS_IOC_GARBAGE_COLLECT:
 4657 		return f2fs_ioc_gc(filp, arg);
 4658 	case F2FS_IOC_GARBAGE_COLLECT_RANGE:
 4659 		return f2fs_ioc_gc_range(filp, arg);
 4660 	case F2FS_IOC_WRITE_CHECKPOINT:
 4661 		return f2fs_ioc_write_checkpoint(filp);
 4662 	case F2FS_IOC_DEFRAGMENT:
 4663 		return f2fs_ioc_defragment(filp, arg);
 4664 	case F2FS_IOC_MOVE_RANGE:
 4665 		return f2fs_ioc_move_range(filp, arg);
 4666 	case F2FS_IOC_FLUSH_DEVICE:
 4667 		return f2fs_ioc_flush_device(filp, arg);
 4668 	case F2FS_IOC_GET_FEATURES:
 4669 		return f2fs_ioc_get_features(filp, arg);
 4670 	case F2FS_IOC_GET_PIN_FILE:
 4671 		return f2fs_ioc_get_pin_file(filp, arg);
 4672 	case F2FS_IOC_SET_PIN_FILE:
 4673 		return f2fs_ioc_set_pin_file(filp, arg);
 4674 	case F2FS_IOC_PRECACHE_EXTENTS:
 4675 		return f2fs_ioc_precache_extents(filp);
 4676 	case F2FS_IOC_RESIZE_FS:
 4677 		return f2fs_ioc_resize_fs(filp, arg);
 4678 	case FS_IOC_ENABLE_VERITY:
 4679 		return f2fs_ioc_enable_verity(filp, arg);
 4680 	case FS_IOC_MEASURE_VERITY:
 4681 		return f2fs_ioc_measure_verity(filp, arg);
 4682 	case FS_IOC_READ_VERITY_METADATA:
 4683 		return f2fs_ioc_read_verity_metadata(filp, arg);
 4684 	case FS_IOC_GETFSLABEL:
 4685 		return f2fs_ioc_getfslabel(filp, arg);
 4686 	case FS_IOC_SETFSLABEL:
 4687 		return f2fs_ioc_setfslabel(filp, arg);
 4688 	case F2FS_IOC_GET_COMPRESS_BLOCKS:
 4689 		return f2fs_ioc_get_compress_blocks(filp, arg);
 4690 	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
 4691 		return f2fs_release_compress_blocks(filp, arg);
 4692 	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
 4693 		return f2fs_reserve_compress_blocks(filp, arg);
 4694 	case F2FS_IOC_SEC_TRIM_FILE:
 4695 		return f2fs_sec_trim_file(filp, arg);
 4696 	case F2FS_IOC_GET_COMPRESS_OPTION:
 4697 		return f2fs_ioc_get_compress_option(filp, arg);
 4698 	case F2FS_IOC_SET_COMPRESS_OPTION:
 4699 		return f2fs_ioc_set_compress_option(filp, arg);
 4700 	case F2FS_IOC_DECOMPRESS_FILE:
 4701 		return f2fs_ioc_decompress_file(filp);
 4702 	case F2FS_IOC_COMPRESS_FILE:
 4703 		return f2fs_ioc_compress_file(filp);
 4704 	case F2FS_IOC_GET_DEV_ALIAS_FILE:
 4705 		return f2fs_ioc_get_dev_alias_file(filp, arg);
 4706 	case F2FS_IOC_IO_PRIO:
 4707 		return f2fs_ioc_io_prio(filp, arg);
 4708 	default:
 4709 		return -ENOTTY;
 4710 	}
 4711 }
 4712 
 4713 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 4714 {
 4715 	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
 4716 		return -EIO;
 4717 	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp))))
 4718 		return -ENOSPC;
 4719 
 4720 	return __f2fs_ioctl(filp, cmd, arg);
 4721 }
 4722 
 4723 /*
 4724  * Return %true if the given read or write request should use direct I/O, or
 4725  * %false if it should use buffered I/O.
 4726  */
 4727 static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb,
 4728 				struct iov_iter *iter)
 4729 {
 4730 	unsigned int align;
 4731 
 4732 	if (!(iocb->ki_flags & IOCB_DIRECT))
 4733 		return false;
 4734 
 4735 	if (f2fs_force_buffered_io(inode, iov_iter_rw(iter)))
 4736 		return false;
 4737 
 4738 	/*
 4739 	 * Direct I/O not aligned to the disk's logical_block_size will be
 4740 	 * attempted, but will fail with -EINVAL.
 4741 	 *
 4742 	 * f2fs additionally requires that direct I/O be aligned to the
 4743 	 * filesystem block size, which is often a stricter requirement.
 4744 	 * However, f2fs traditionally falls back to buffered I/O on requests
 4745 	 * that are logical_block_size-aligned but not fs-block aligned.
 4746 	 *
 4747 	 * The below logic implements this behavior.
 4748 	 */
 4749 	align = iocb->ki_pos | iov_iter_alignment(iter);
 4750 	if (!IS_ALIGNED(align, i_blocksize(inode)) &&
 4751 	    IS_ALIGNED(align, bdev_logical_block_size(inode->i_sb->s_bdev)))
 4752 		return false;
 4753 
 4754 	return true;
 4755 }
 4756 
 4757 static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error,
 4758 				unsigned int flags)
 4759 {
 4760 	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));
 4761 
 4762 	dec_page_count(sbi, F2FS_DIO_READ);
 4763 	if (error)
 4764 		return error;
 4765 	f2fs_update_iostat(sbi, NULL, APP_DIRECT_READ_IO, size);
 4766 	return 0;
 4767 }
 4768 
 4769 static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = {
 4770 	.end_io = f2fs_dio_read_end_io,
 4771 };
 4772 
 4773 static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
 4774 {
 4775 	struct file *file = iocb->ki_filp;
 4776 	struct inode *inode = file_inode(file);
 4777 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4778 	struct f2fs_inode_info *fi = F2FS_I(inode);
 4779 	const loff_t pos = iocb->ki_pos;
 4780 	const size_t count = iov_iter_count(to);
 4781 	struct iomap_dio *dio;
 4782 	ssize_t ret;
 4783 
 4784 	if (count == 0)
 4785 		return 0; /* skip atime update */
 4786 
 4787 	trace_f2fs_direct_IO_enter(inode, iocb, count, READ);
 4788 
 4789 	if (iocb->ki_flags & IOCB_NOWAIT) {
 4790 		if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {
 4791 			ret = -EAGAIN;
 4792 			goto out;
 4793 		}
 4794 	} else {
 4795 		f2fs_down_read(&fi->i_gc_rwsem[READ]);
 4796 	}
 4797 
 4798 	/* dio is not compatible w/ atomic file */
 4799 	if (f2fs_is_atomic_file(inode)) {
 4800 		f2fs_up_read(&fi->i_gc_rwsem[READ]);
 4801 		ret = -EOPNOTSUPP;
 4802 		goto out;
 4803 	}
 4804 
 4805 	/*
 4806 	 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
 4807 	 * the higher-level function iomap_dio_rw() in order to ensure that the
 4808 	 * F2FS_DIO_READ counter will be decremented correctly in all cases.
 4809 	 */
 4810 	inc_page_count(sbi, F2FS_DIO_READ);
 4811 	dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops,
 4812 			     &f2fs_iomap_dio_read_ops, 0, NULL, 0);
 4813 	if (IS_ERR_OR_NULL(dio)) {
 4814 		ret = PTR_ERR_OR_ZERO(dio);
 4815 		if (ret != -EIOCBQUEUED)
 4816 			dec_page_count(sbi, F2FS_DIO_READ);
 4817 	} else {
 4818 		ret = iomap_dio_complete(dio);
 4819 	}
 4820 
 4821 	f2fs_up_read(&fi->i_gc_rwsem[READ]);
 4822 
 4823 	file_accessed(file);
 4824 out:
 4825 	trace_f2fs_direct_IO_exit(inode, pos, count, READ, ret);
 4826 	return ret;
 4827 }
 4828 
 4829 static void f2fs_trace_rw_file_path(struct file *file, loff_t pos, size_t count,
 4830 				    int rw)
 4831 {
 4832 	struct inode *inode = file_inode(file);
 4833 	char *buf, *path;
 4834 
 4835 	buf = f2fs_getname(F2FS_I_SB(inode));
 4836 	if (!buf)
 4837 		return;
 4838 	path = dentry_path_raw(file_dentry(file), buf, PATH_MAX);
 4839 	if (IS_ERR(path))
 4840 		goto free_buf;
 4841 	if (rw == WRITE)
 4842 		trace_f2fs_datawrite_start(inode, pos, count,
 4843 				current->pid, path, current->comm);
 4844 	else
 4845 		trace_f2fs_dataread_start(inode, pos, count,
 4846 				current->pid, path, current->comm);
 4847 free_buf:
 4848 	f2fs_putname(buf);
 4849 }
 4850 
 4851 static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 4852 {
 4853 	struct inode *inode = file_inode(iocb->ki_filp);
 4854 	const loff_t pos = iocb->ki_pos;
 4855 	ssize_t ret;
 4856 	bool dio;
 4857 
 4858 	if (!f2fs_is_compress_backend_ready(inode))
 4859 		return -EOPNOTSUPP;
 4860 
 4861 	if (trace_f2fs_dataread_start_enabled())
 4862 		f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,
 4863 					iov_iter_count(to), READ);
 4864 
 4865 	dio = f2fs_should_use_dio(inode, iocb, to);
 4866 
 4867 	/* In LFS mode, if there is inflight dio, wait for its completion */
 4868 	if (f2fs_lfs_mode(F2FS_I_SB(inode)) &&
 4869 	    get_pages(F2FS_I_SB(inode), F2FS_DIO_WRITE) &&
 4870 		(!f2fs_is_pinned_file(inode) || !dio))
 4871 		inode_dio_wait(inode);
 4872 
 4873 	if (dio) {
 4874 		ret = f2fs_dio_read_iter(iocb, to);
 4875 	} else {
 4876 		ret = filemap_read(iocb, to, 0);
 4877 		if (ret > 0)
 4878 			f2fs_update_iostat(F2FS_I_SB(inode), inode,
 4879 						APP_BUFFERED_READ_IO, ret);
 4880 	}
 4881 	trace_f2fs_dataread_end(inode, pos, ret);
 4882 	return ret;
 4883 }
 4884 
 4885 static ssize_t f2fs_file_splice_read(struct file *in, loff_t *ppos,
 4886 				     struct pipe_inode_info *pipe,
 4887 				     size_t len, unsigned int flags)
 4888 {
 4889 	struct inode *inode = file_inode(in);
 4890 	const loff_t pos = *ppos;
 4891 	ssize_t ret;
 4892 
 4893 	if (!f2fs_is_compress_backend_ready(inode))
 4894 		return -EOPNOTSUPP;
 4895 
 4896 	if (trace_f2fs_dataread_start_enabled())
 4897 		f2fs_trace_rw_file_path(in, pos, len, READ);
 4898 
 4899 	ret = filemap_splice_read(in, ppos, pipe, len, flags);
 4900 	if (ret > 0)
 4901 		f2fs_update_iostat(F2FS_I_SB(inode), inode,
 4902 				   APP_BUFFERED_READ_IO, ret);
 4903 
 4904 	trace_f2fs_dataread_end(inode, pos, ret);
 4905 	return ret;
 4906 }
 4907 
 4908 static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from)
 4909 {
 4910 	struct file *file = iocb->ki_filp;
 4911 	struct inode *inode = file_inode(file);
 4912 	ssize_t count;
 4913 	int err;
 4914 
 4915 	if (IS_IMMUTABLE(inode))
 4916 		return -EPERM;
 4917 
 4918 	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
 4919 		return -EPERM;
 4920 
 4921 	count = generic_write_checks(iocb, from);
 4922 	if (count <= 0)
 4923 		return count;
 4924 
 4925 	err = file_modified(file);
 4926 	if (err)
 4927 		return err;
 4928 
 4929 	f2fs_zero_post_eof_page(inode,
 4930 		iocb->ki_pos + iov_iter_count(from), true);
 4931 	return count;
 4932 }
 4933 
 4934 /*
 4935  * Preallocate blocks for a write request, if it is possible and helpful to do
 4936  * so.  Returns a positive number if blocks may have been preallocated, 0 if no
 4937  * blocks were preallocated, or a negative errno value if something went
 4938  * seriously wrong.  Also sets FI_PREALLOCATED_ALL on the inode if *all* the
 4939  * requested blocks (not just some of them) have been allocated.
 4940  */
 4941 static int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *iter,
 4942 				   bool dio)
 4943 {
 4944 	struct inode *inode = file_inode(iocb->ki_filp);
 4945 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 4946 	const loff_t pos = iocb->ki_pos;
 4947 	const size_t count = iov_iter_count(iter);
 4948 	struct f2fs_map_blocks map = {};
 4949 	int flag;
 4950 	int ret;
 4951 
 4952 	/* If it will be an out-of-place direct write, don't bother. */
 4953 	if (dio && f2fs_lfs_mode(sbi))
 4954 		return 0;
 4955 	/*
 4956 	 * Don't preallocate holes aligned to DIO_SKIP_HOLES which turns into
 4957 	 * buffered IO, if DIO meets any holes.
 4958 	 */
 4959 	if (dio && i_size_read(inode) &&
 4960 		(F2FS_BYTES_TO_BLK(pos) < F2FS_BLK_ALIGN(i_size_read(inode))))
 4961 		return 0;
 4962 
 4963 	/* No-wait I/O can't allocate blocks. */
 4964 	if (iocb->ki_flags & IOCB_NOWAIT)
 4965 		return 0;
 4966 
 4967 	/* If it will be a short write, don't bother. */
 4968 	if (fault_in_iov_iter_readable(iter, count))
 4969 		return 0;
 4970 
 4971 	if (f2fs_has_inline_data(inode)) {
 4972 		/* If the data will fit inline, don't bother. */
 4973 		if (pos + count <= MAX_INLINE_DATA(inode))
 4974 			return 0;
 4975 		ret = f2fs_convert_inline_inode(inode);
 4976 		if (ret)
 4977 			return ret;
 4978 	}
 4979 
 4980 	/* Do not preallocate blocks that will be written partially in 4KB. */
 4981 	map.m_lblk = F2FS_BLK_ALIGN(pos);
 4982 	map.m_len = F2FS_BYTES_TO_BLK(pos + count);
 4983 	if (map.m_len > map.m_lblk)
 4984 		map.m_len -= map.m_lblk;
 4985 	else
 4986 		return 0;
 4987 
 4988 	if (!IS_DEVICE_ALIASING(inode))
 4989 		map.m_may_create = true;
 4990 	if (dio) {
 4991 		map.m_seg_type = f2fs_rw_hint_to_seg_type(sbi,
 4992 						inode->i_write_hint);
 4993 		flag = F2FS_GET_BLOCK_PRE_DIO;
 4994 	} else {
 4995 		map.m_seg_type = NO_CHECK_TYPE;
 4996 		flag = F2FS_GET_BLOCK_PRE_AIO;
 4997 	}
 4998 
 4999 	ret = f2fs_map_blocks(inode, &map, flag);
 5000 	/* -ENOSPC|-EDQUOT are fine to report the number of allocated blocks. */
 5001 	if (ret < 0 && !((ret == -ENOSPC || ret == -EDQUOT) && map.m_len > 0))
 5002 		return ret;
 5003 	if (ret == 0)
 5004 		set_inode_flag(inode, FI_PREALLOCATED_ALL);
 5005 	return map.m_len;
 5006 }
 5007 
 5008 static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
 5009 					struct iov_iter *from)
 5010 {
 5011 	struct file *file = iocb->ki_filp;
 5012 	struct inode *inode = file_inode(file);
 5013 	ssize_t ret;
 5014 
 5015 	if (iocb->ki_flags & IOCB_NOWAIT)
 5016 		return -EOPNOTSUPP;
 5017 
 5018 	ret = generic_perform_write(iocb, from);
 5019 
 5020 	if (ret > 0) {
 5021 		f2fs_update_iostat(F2FS_I_SB(inode), inode,
 5022 						APP_BUFFERED_IO, ret);
 5023 	}
 5024 	return ret;
 5025 }
 5026 
 5027 static int f2fs_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error,
 5028 				 unsigned int flags)
 5029 {
 5030 	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));
 5031 
 5032 	dec_page_count(sbi, F2FS_DIO_WRITE);
 5033 	if (error)
 5034 		return error;
 5035 	f2fs_update_time(sbi, REQ_TIME);
 5036 	f2fs_update_iostat(sbi, NULL, APP_DIRECT_IO, size);
 5037 	return 0;
 5038 }
 5039 
 5040 static void f2fs_dio_write_submit_io(const struct iomap_iter *iter,
 5041 					struct bio *bio, loff_t file_offset)
 5042 {
 5043 	struct inode *inode = iter->inode;
 5044 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 5045 	enum log_type type = f2fs_rw_hint_to_seg_type(sbi, inode->i_write_hint);
 5046 	enum temp_type temp = f2fs_get_segment_temp(sbi, type);
 5047 
 5048 	bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, DATA, temp);
 5049 	submit_bio(bio);
 5050 }
 5051 
 5052 static const struct iomap_dio_ops f2fs_iomap_dio_write_ops = {
 5053 	.end_io		= f2fs_dio_write_end_io,
 5054 	.submit_io	= f2fs_dio_write_submit_io,
 5055 };
 5056 
 5057 static void f2fs_flush_buffered_write(struct address_space *mapping,
 5058 				      loff_t start_pos, loff_t end_pos)
 5059 {
 5060 	int ret;
 5061 
 5062 	ret = filemap_write_and_wait_range(mapping, start_pos, end_pos);
 5063 	if (ret < 0)
 5064 		return;
 5065 	invalidate_mapping_pages(mapping,
 5066 				 start_pos >> PAGE_SHIFT,
 5067 				 end_pos >> PAGE_SHIFT);
 5068 }
 5069 
 5070 static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
 5071 				   bool *may_need_sync)
 5072 {
 5073 	struct file *file = iocb->ki_filp;
 5074 	struct inode *inode = file_inode(file);
 5075 	struct f2fs_inode_info *fi = F2FS_I(inode);
 5076 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 5077 	const bool do_opu = f2fs_lfs_mode(sbi);
 5078 	const loff_t pos = iocb->ki_pos;
 5079 	const ssize_t count = iov_iter_count(from);
 5080 	unsigned int dio_flags;
 5081 	struct iomap_dio *dio;
 5082 	ssize_t ret;
 5083 
 5084 	trace_f2fs_direct_IO_enter(inode, iocb, count, WRITE);
 5085 
 5086 	if (iocb->ki_flags & IOCB_NOWAIT) {
 5087 		/* f2fs_convert_inline_inode() and block allocation can block */
 5088 		if (f2fs_has_inline_data(inode) ||
 5089 		    !f2fs_overwrite_io(inode, pos, count)) {
 5090 			ret = -EAGAIN;
 5091 			goto out;
 5092 		}
 5093 
 5094 		if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[WRITE])) {
 5095 			ret = -EAGAIN;
 5096 			goto out;
 5097 		}
 5098 		if (do_opu && !f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {
 5099 			f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
 5100 			ret = -EAGAIN;
 5101 			goto out;
 5102 		}
 5103 	} else {
 5104 		ret = f2fs_convert_inline_inode(inode);
 5105 		if (ret)
 5106 			goto out;
 5107 
 5108 		f2fs_down_read(&fi->i_gc_rwsem[WRITE]);
 5109 		if (do_opu)
 5110 			f2fs_down_read(&fi->i_gc_rwsem[READ]);
 5111 	}
 5112 
 5113 	/*
 5114 	 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
 5115 	 * the higher-level function iomap_dio_rw() in order to ensure that the
 5116 	 * F2FS_DIO_WRITE counter will be decremented correctly in all cases.
 5117 	 */
 5118 	inc_page_count(sbi, F2FS_DIO_WRITE);
 5119 	dio_flags = 0;
 5120 	if (pos + count > inode->i_size)
 5121 		dio_flags |= IOMAP_DIO_FORCE_WAIT;
 5122 	dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops,
 5123 			     &f2fs_iomap_dio_write_ops, dio_flags, NULL, 0);
 5124 	if (IS_ERR_OR_NULL(dio)) {
 5125 		ret = PTR_ERR_OR_ZERO(dio);
 5126 		if (ret == -ENOTBLK)
 5127 			ret = 0;
 5128 		if (ret != -EIOCBQUEUED)
 5129 			dec_page_count(sbi, F2FS_DIO_WRITE);
 5130 	} else {
 5131 		ret = iomap_dio_complete(dio);
 5132 	}
 5133 
 5134 	if (do_opu)
 5135 		f2fs_up_read(&fi->i_gc_rwsem[READ]);
 5136 	f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
 5137 
 5138 	if (ret < 0)
 5139 		goto out;
 5140 	if (pos + ret > inode->i_size)
 5141 		f2fs_i_size_write(inode, pos + ret);
 5142 	if (!do_opu)
 5143 		set_inode_flag(inode, FI_UPDATE_WRITE);
 5144 
 5145 	if (iov_iter_count(from)) {
 5146 		ssize_t ret2;
 5147 		loff_t bufio_start_pos = iocb->ki_pos;
 5148 
 5149 		/*
 5150 		 * The direct write was partial, so we need to fall back to a
 5151 		 * buffered write for the remainder.
 5152 		 */
 5153 
 5154 		ret2 = f2fs_buffered_write_iter(iocb, from);
 5155 		if (iov_iter_count(from))
 5156 			f2fs_write_failed(inode, iocb->ki_pos);
 5157 		if (ret2 < 0)
 5158 			goto out;
 5159 
 5160 		/*
 5161 		 * Ensure that the pagecache pages are written to disk and
 5162 		 * invalidated to preserve the expected O_DIRECT semantics.
 5163 		 */
 5164 		if (ret2 > 0) {
 5165 			loff_t bufio_end_pos = bufio_start_pos + ret2 - 1;
 5166 
 5167 			ret += ret2;
 5168 
 5169 			f2fs_flush_buffered_write(file->f_mapping,
 5170 						  bufio_start_pos,
 5171 						  bufio_end_pos);
 5172 		}
 5173 	} else {
 5174 		/* iomap_dio_rw() already handled the generic_write_sync(). */
 5175 		*may_need_sync = false;
 5176 	}
 5177 out:
 5178 	trace_f2fs_direct_IO_exit(inode, pos, count, WRITE, ret);
 5179 	return ret;
 5180 }
 5181 
 5182 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 5183 {
 5184 	struct inode *inode = file_inode(iocb->ki_filp);
 5185 	const loff_t orig_pos = iocb->ki_pos;
 5186 	const size_t orig_count = iov_iter_count(from);
 5187 	loff_t target_size;
 5188 	bool dio;
 5189 	bool may_need_sync = true;
 5190 	int preallocated;
 5191 	const loff_t pos = iocb->ki_pos;
 5192 	const ssize_t count = iov_iter_count(from);
 5193 	ssize_t ret;
 5194 
 5195 	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
 5196 		ret = -EIO;
 5197 		goto out;
 5198 	}
 5199 
 5200 	if (!f2fs_is_compress_backend_ready(inode)) {
 5201 		ret = -EOPNOTSUPP;
 5202 		goto out;
 5203 	}
 5204 
 5205 	if (iocb->ki_flags & IOCB_NOWAIT) {
 5206 		if (!inode_trylock(inode)) {
 5207 			ret = -EAGAIN;
 5208 			goto out;
 5209 		}
 5210 	} else {
 5211 		inode_lock(inode);
 5212 	}
 5213 
 5214 	if (f2fs_is_pinned_file(inode) &&
 5215 	    !f2fs_overwrite_io(inode, pos, count)) {
 5216 		ret = -EIO;
 5217 		goto out_unlock;
 5218 	}
 5219 
 5220 	ret = f2fs_write_checks(iocb, from);
 5221 	if (ret <= 0)
 5222 		goto out_unlock;
 5223 
 5224 	/* Determine whether we will do a direct write or a buffered write. */
 5225 	dio = f2fs_should_use_dio(inode, iocb, from);
 5226 
 5227 	/* dio is not compatible w/ atomic write */
 5228 	if (dio && f2fs_is_atomic_file(inode)) {
 5229 		ret = -EOPNOTSUPP;
 5230 		goto out_unlock;
 5231 	}
 5232 
 5233 	/* Possibly preallocate the blocks for the write. */
 5234 	target_size = iocb->ki_pos + iov_iter_count(from);
 5235 	preallocated = f2fs_preallocate_blocks(iocb, from, dio);
 5236 	if (preallocated < 0) {
 5237 		ret = preallocated;
 5238 	} else {
 5239 		if (trace_f2fs_datawrite_start_enabled())
 5240 			f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,
 5241 						orig_count, WRITE);
 5242 
 5243 		/* Do the actual write. */
 5244 		ret = dio ?
 5245 			f2fs_dio_write_iter(iocb, from, &may_need_sync) :
 5246 			f2fs_buffered_write_iter(iocb, from);
 5247 
 5248 		trace_f2fs_datawrite_end(inode, orig_pos, ret);
 5249 	}
 5250 
 5251 	/* Don't leave any preallocated blocks around past i_size. */
 5252 	if (preallocated && i_size_read(inode) < target_size) {
 5253 		f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 5254 		filemap_invalidate_lock(inode->i_mapping);
 5255 		if (!f2fs_truncate(inode))
 5256 			file_dont_truncate(inode);
 5257 		filemap_invalidate_unlock(inode->i_mapping);
 5258 		f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 5259 	} else {
 5260 		file_dont_truncate(inode);
 5261 	}
 5262 
 5263 	clear_inode_flag(inode, FI_PREALLOCATED_ALL);
 5264 out_unlock:
 5265 	inode_unlock(inode);
 5266 out:
 5267 	trace_f2fs_file_write_iter(inode, orig_pos, orig_count, ret);
 5268 
 5269 	if (ret > 0 && may_need_sync)
 5270 		ret = generic_write_sync(iocb, ret);
 5271 
 5272 	/* If buffered IO was forced, flush and drop the data from
 5273 	 * the page cache to preserve O_DIRECT semantics
 5274 	 */
 5275 	if (ret > 0 && !dio && (iocb->ki_flags & IOCB_DIRECT))
 5276 		f2fs_flush_buffered_write(iocb->ki_filp->f_mapping,
 5277 					  orig_pos,
 5278 					  orig_pos + ret - 1);
 5279 
 5280 	return ret;
 5281 }
 5282 
 5283 static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
 5284 		int advice)
 5285 {
 5286 	struct address_space *mapping;
 5287 	struct backing_dev_info *bdi;
 5288 	struct inode *inode = file_inode(filp);
 5289 	int err;
 5290 
 5291 	if (advice == POSIX_FADV_SEQUENTIAL) {
 5292 		if (S_ISFIFO(inode->i_mode))
 5293 			return -ESPIPE;
 5294 
 5295 		mapping = filp->f_mapping;
 5296 		if (!mapping || len < 0)
 5297 			return -EINVAL;
 5298 
 5299 		bdi = inode_to_bdi(mapping->host);
 5300 		filp->f_ra.ra_pages = bdi->ra_pages *
 5301 			F2FS_I_SB(inode)->seq_file_ra_mul;
 5302 		spin_lock(&filp->f_lock);
 5303 		filp->f_mode &= ~FMODE_RANDOM;
 5304 		spin_unlock(&filp->f_lock);
 5305 		return 0;
 5306 	} else if (advice == POSIX_FADV_WILLNEED && offset == 0) {
 5307 		/* Load extent cache at the first readahead. */
 5308 		f2fs_precache_extents(inode);
 5309 	}
 5310 
 5311 	err = generic_fadvise(filp, offset, len, advice);
 5312 	if (err)
 5313 		return err;
 5314 
 5315 	if (advice == POSIX_FADV_DONTNEED &&
 5316 	    (test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) &&
 5317 	     f2fs_compressed_file(inode)))
 5318 		f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino);
 5319 	else if (advice == POSIX_FADV_NOREUSE)
 5320 		err = f2fs_keep_noreuse_range(inode, offset, len);
 5321 	return err;
 5322 }
 5323 
 5324 #ifdef CONFIG_COMPAT
 5325 struct compat_f2fs_gc_range {
 5326 	u32 sync;
 5327 	compat_u64 start;
 5328 	compat_u64 len;
 5329 };
 5330 #define F2FS_IOC32_GARBAGE_COLLECT_RANGE	_IOW(F2FS_IOCTL_MAGIC, 11,\
 5331 						struct compat_f2fs_gc_range)
 5332 
 5333 static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg)
 5334 {
 5335 	struct compat_f2fs_gc_range __user *urange;
 5336 	struct f2fs_gc_range range;
 5337 	int err;
 5338 
 5339 	urange = compat_ptr(arg);
 5340 	err = get_user(range.sync, &urange->sync);
 5341 	err |= get_user(range.start, &urange->start);
 5342 	err |= get_user(range.len, &urange->len);
 5343 	if (err)
 5344 		return -EFAULT;
 5345 
 5346 	return __f2fs_ioc_gc_range(file, &range);
 5347 }
 5348 
 5349 struct compat_f2fs_move_range {
 5350 	u32 dst_fd;
 5351 	compat_u64 pos_in;
 5352 	compat_u64 pos_out;
 5353 	compat_u64 len;
 5354 };
 5355 #define F2FS_IOC32_MOVE_RANGE		_IOWR(F2FS_IOCTL_MAGIC, 9,	\
 5356 					struct compat_f2fs_move_range)
 5357 
 5358 static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg)
 5359 {
 5360 	struct compat_f2fs_move_range __user *urange;
 5361 	struct f2fs_move_range range;
 5362 	int err;
 5363 
 5364 	urange = compat_ptr(arg);
 5365 	err = get_user(range.dst_fd, &urange->dst_fd);
 5366 	err |= get_user(range.pos_in, &urange->pos_in);
 5367 	err |= get_user(range.pos_out, &urange->pos_out);
 5368 	err |= get_user(range.len, &urange->len);
 5369 	if (err)
 5370 		return -EFAULT;
 5371 
 5372 	return __f2fs_ioc_move_range(file, &range);
 5373 }
 5374 
 5375 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 5376 {
 5377 	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
 5378 		return -EIO;
 5379 	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file))))
 5380 		return -ENOSPC;
 5381 
 5382 	switch (cmd) {
 5383 	case FS_IOC32_GETVERSION:
 5384 		cmd = FS_IOC_GETVERSION;
 5385 		break;
 5386 	case F2FS_IOC32_GARBAGE_COLLECT_RANGE:
 5387 		return f2fs_compat_ioc_gc_range(file, arg);
 5388 	case F2FS_IOC32_MOVE_RANGE:
 5389 		return f2fs_compat_ioc_move_range(file, arg);
 5390 	case F2FS_IOC_START_ATOMIC_WRITE:
 5391 	case F2FS_IOC_START_ATOMIC_REPLACE:
 5392 	case F2FS_IOC_COMMIT_ATOMIC_WRITE:
 5393 	case F2FS_IOC_START_VOLATILE_WRITE:
 5394 	case F2FS_IOC_RELEASE_VOLATILE_WRITE:
 5395 	case F2FS_IOC_ABORT_ATOMIC_WRITE:
 5396 	case F2FS_IOC_SHUTDOWN:
 5397 	case FITRIM:
 5398 	case FS_IOC_SET_ENCRYPTION_POLICY:
 5399 	case FS_IOC_GET_ENCRYPTION_PWSALT:
 5400 	case FS_IOC_GET_ENCRYPTION_POLICY:
 5401 	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
 5402 	case FS_IOC_ADD_ENCRYPTION_KEY:
 5403 	case FS_IOC_REMOVE_ENCRYPTION_KEY:
 5404 	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
 5405 	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
 5406 	case FS_IOC_GET_ENCRYPTION_NONCE:
 5407 	case F2FS_IOC_GARBAGE_COLLECT:
 5408 	case F2FS_IOC_WRITE_CHECKPOINT:
 5409 	case F2FS_IOC_DEFRAGMENT:
 5410 	case F2FS_IOC_FLUSH_DEVICE:
 5411 	case F2FS_IOC_GET_FEATURES:
 5412 	case F2FS_IOC_GET_PIN_FILE:
 5413 	case F2FS_IOC_SET_PIN_FILE:
 5414 	case F2FS_IOC_PRECACHE_EXTENTS:
 5415 	case F2FS_IOC_RESIZE_FS:
 5416 	case FS_IOC_ENABLE_VERITY:
 5417 	case FS_IOC_MEASURE_VERITY:
 5418 	case FS_IOC_READ_VERITY_METADATA:
 5419 	case FS_IOC_GETFSLABEL:
 5420 	case FS_IOC_SETFSLABEL:
 5421 	case F2FS_IOC_GET_COMPRESS_BLOCKS:
 5422 	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
 5423 	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
 5424 	case F2FS_IOC_SEC_TRIM_FILE:
 5425 	case F2FS_IOC_GET_COMPRESS_OPTION:
 5426 	case F2FS_IOC_SET_COMPRESS_OPTION:
 5427 	case F2FS_IOC_DECOMPRESS_FILE:
 5428 	case F2FS_IOC_COMPRESS_FILE:
 5429 	case F2FS_IOC_GET_DEV_ALIAS_FILE:
 5430 	case F2FS_IOC_IO_PRIO:
 5431 		break;
 5432 	default:
 5433 		return -ENOIOCTLCMD;
 5434 	}
 5435 	return __f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
 5436 }
 5437 #endif
 5438 
 5439 const struct file_operations f2fs_file_operations = {
 5440 	.llseek		= f2fs_llseek,
 5441 	.read_iter	= f2fs_file_read_iter,
 5442 	.write_iter	= f2fs_file_write_iter,
 5443 	.iopoll		= iocb_bio_iopoll,
 5444 	.open		= f2fs_file_open,
 5445 	.release	= f2fs_release_file,
 5446 	.mmap_prepare	= f2fs_file_mmap_prepare,
 5447 	.flush		= f2fs_file_flush,
 5448 	.fsync		= f2fs_sync_file,
 5449 	.fallocate	= f2fs_fallocate,
 5450 	.unlocked_ioctl	= f2fs_ioctl,
 5451 #ifdef CONFIG_COMPAT
 5452 	.compat_ioctl	= f2fs_compat_ioctl,
 5453 #endif
 5454 	.splice_read	= f2fs_file_splice_read,
 5455 	.splice_write	= iter_file_splice_write,
 5456 	.fadvise	= f2fs_file_fadvise,
 5457 	.fop_flags	= FOP_BUFFER_RASYNC,
 5458 };