brintos / linux-shallow public Read only

1// SPDX-License-Identifier: GPL-2.02/*3 * fs/f2fs/file.c4 *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 38static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)39{40	struct inode *inode = file_inode(vmf->vma->vm_file);41	vm_flags_t flags = vmf->vma->vm_flags;42	vm_fault_t ret;43 44	ret = filemap_fault(vmf);45	if (ret & VM_FAULT_LOCKED)46		f2fs_update_iostat(F2FS_I_SB(inode), inode,47					APP_MAPPED_READ_IO, F2FS_BLKSIZE);48 49	trace_f2fs_filemap_fault(inode, vmf->pgoff, flags, ret);50 51	return ret;52}53 54static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)55{56	struct folio *folio = page_folio(vmf->page);57	struct inode *inode = file_inode(vmf->vma->vm_file);58	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);59	struct dnode_of_data dn;60	bool need_alloc = !f2fs_is_pinned_file(inode);61	int err = 0;62	vm_fault_t ret;63 64	if (unlikely(IS_IMMUTABLE(inode)))65		return VM_FAULT_SIGBUS;66 67	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {68		err = -EIO;69		goto out;70	}71 72	if (unlikely(f2fs_cp_error(sbi))) {73		err = -EIO;74		goto out;75	}76 77	if (!f2fs_is_checkpoint_ready(sbi)) {78		err = -ENOSPC;79		goto out;80	}81 82	err = f2fs_convert_inline_inode(inode);83	if (err)84		goto out;85 86#ifdef CONFIG_F2FS_FS_COMPRESSION87	if (f2fs_compressed_file(inode)) {88		int ret = f2fs_is_compressed_cluster(inode, folio->index);89 90		if (ret < 0) {91			err = ret;92			goto out;93		} else if (ret) {94			need_alloc = false;95		}96	}97#endif98	/* should do out of any locked page */99	if (need_alloc)100		f2fs_balance_fs(sbi, true);101 102	sb_start_pagefault(inode->i_sb);103 104	f2fs_bug_on(sbi, f2fs_has_inline_data(inode));105 106	file_update_time(vmf->vma->vm_file);107	filemap_invalidate_lock_shared(inode->i_mapping);108	folio_lock(folio);109	if (unlikely(folio->mapping != inode->i_mapping ||110			folio_pos(folio) > i_size_read(inode) ||111			!folio_test_uptodate(folio))) {112		folio_unlock(folio);113		err = -EFAULT;114		goto out_sem;115	}116 117	set_new_dnode(&dn, inode, NULL, NULL, 0);118	if (need_alloc) {119		/* block allocation */120		err = f2fs_get_block_locked(&dn, folio->index);121	} else {122		err = f2fs_get_dnode_of_data(&dn, folio->index, LOOKUP_NODE);123		f2fs_put_dnode(&dn);124		if (f2fs_is_pinned_file(inode) &&125		    !__is_valid_data_blkaddr(dn.data_blkaddr))126			err = -EIO;127	}128 129	if (err) {130		folio_unlock(folio);131		goto out_sem;132	}133 134	f2fs_wait_on_page_writeback(folio_page(folio, 0), DATA, false, true);135 136	/* wait for GCed page writeback via META_MAPPING */137	f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);138 139	/*140	 * check to see if the page is mapped already (no holes)141	 */142	if (folio_test_mappedtodisk(folio))143		goto out_sem;144 145	/* page is wholly or partially inside EOF */146	if (((loff_t)(folio->index + 1) << PAGE_SHIFT) >147						i_size_read(inode)) {148		loff_t offset;149 150		offset = i_size_read(inode) & ~PAGE_MASK;151		folio_zero_segment(folio, offset, folio_size(folio));152	}153	folio_mark_dirty(folio);154 155	f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE);156	f2fs_update_time(sbi, REQ_TIME);157 158out_sem:159	filemap_invalidate_unlock_shared(inode->i_mapping);160 161	sb_end_pagefault(inode->i_sb);162out:163	ret = vmf_fs_error(err);164 165	trace_f2fs_vm_page_mkwrite(inode, folio->index, vmf->vma->vm_flags, ret);166	return ret;167}168 169static const struct vm_operations_struct f2fs_file_vm_ops = {170	.fault		= f2fs_filemap_fault,171	.map_pages	= filemap_map_pages,172	.page_mkwrite	= f2fs_vm_page_mkwrite,173};174 175static int get_parent_ino(struct inode *inode, nid_t *pino)176{177	struct dentry *dentry;178 179	/*180	 * Make sure to get the non-deleted alias.  The alias associated with181	 * the open file descriptor being fsync()'ed may be deleted already.182	 */183	dentry = d_find_alias(inode);184	if (!dentry)185		return 0;186 187	*pino = d_parent_ino(dentry);188	dput(dentry);189	return 1;190}191 192static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)193{194	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);195	enum cp_reason_type cp_reason = CP_NO_NEEDED;196 197	if (!S_ISREG(inode->i_mode))198		cp_reason = CP_NON_REGULAR;199	else if (f2fs_compressed_file(inode))200		cp_reason = CP_COMPRESSED;201	else if (inode->i_nlink != 1)202		cp_reason = CP_HARDLINK;203	else if (is_sbi_flag_set(sbi, SBI_NEED_CP))204		cp_reason = CP_SB_NEED_CP;205	else if (file_wrong_pino(inode))206		cp_reason = CP_WRONG_PINO;207	else if (!f2fs_space_for_roll_forward(sbi))208		cp_reason = CP_NO_SPC_ROLL;209	else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))210		cp_reason = CP_NODE_NEED_CP;211	else if (test_opt(sbi, FASTBOOT))212		cp_reason = CP_FASTBOOT_MODE;213	else if (F2FS_OPTION(sbi).active_logs == 2)214		cp_reason = CP_SPEC_LOG_NUM;215	else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&216		f2fs_need_dentry_mark(sbi, inode->i_ino) &&217		f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,218							TRANS_DIR_INO))219		cp_reason = CP_RECOVER_DIR;220	else if (f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,221							XATTR_DIR_INO))222		cp_reason = CP_XATTR_DIR;223 224	return cp_reason;225}226 227static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)228{229	struct page *i = find_get_page(NODE_MAPPING(sbi), ino);230	bool ret = false;231	/* But we need to avoid that there are some inode updates */232	if ((i && PageDirty(i)) || f2fs_need_inode_block_update(sbi, ino))233		ret = true;234	f2fs_put_page(i, 0);235	return ret;236}237 238static void try_to_fix_pino(struct inode *inode)239{240	struct f2fs_inode_info *fi = F2FS_I(inode);241	nid_t pino;242 243	f2fs_down_write(&fi->i_sem);244	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&245			get_parent_ino(inode, &pino)) {246		f2fs_i_pino_write(inode, pino);247		file_got_pino(inode);248	}249	f2fs_up_write(&fi->i_sem);250}251 252static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,253						int datasync, bool atomic)254{255	struct inode *inode = file->f_mapping->host;256	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);257	nid_t ino = inode->i_ino;258	int ret = 0;259	enum cp_reason_type cp_reason = 0;260	struct writeback_control wbc = {261		.sync_mode = WB_SYNC_ALL,262		.nr_to_write = LONG_MAX,263		.for_reclaim = 0,264	};265	unsigned int seq_id = 0;266 267	if (unlikely(f2fs_readonly(inode->i_sb)))268		return 0;269 270	trace_f2fs_sync_file_enter(inode);271 272	if (S_ISDIR(inode->i_mode))273		goto go_write;274 275	/* if fdatasync is triggered, let's do in-place-update */276	if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)277		set_inode_flag(inode, FI_NEED_IPU);278	ret = file_write_and_wait_range(file, start, end);279	clear_inode_flag(inode, FI_NEED_IPU);280 281	if (ret || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {282		trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);283		return ret;284	}285 286	/* if the inode is dirty, let's recover all the time */287	if (!f2fs_skip_inode_update(inode, datasync)) {288		f2fs_write_inode(inode, NULL);289		goto go_write;290	}291 292	/*293	 * if there is no written data, don't waste time to write recovery info.294	 */295	if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&296			!f2fs_exist_written_data(sbi, ino, APPEND_INO)) {297 298		/* it may call write_inode just prior to fsync */299		if (need_inode_page_update(sbi, ino))300			goto go_write;301 302		if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||303				f2fs_exist_written_data(sbi, ino, UPDATE_INO))304			goto flush_out;305		goto out;306	} else {307		/*308		 * for OPU case, during fsync(), node can be persisted before309		 * data when lower device doesn't support write barrier, result310		 * in data corruption after SPO.311		 * So for strict fsync mode, force to use atomic write semantics312		 * to keep write order in between data/node and last node to313		 * avoid potential data corruption.314		 */315		if (F2FS_OPTION(sbi).fsync_mode ==316				FSYNC_MODE_STRICT && !atomic)317			atomic = true;318	}319go_write:320	/*321	 * Both of fdatasync() and fsync() are able to be recovered from322	 * sudden-power-off.323	 */324	f2fs_down_read(&F2FS_I(inode)->i_sem);325	cp_reason = need_do_checkpoint(inode);326	f2fs_up_read(&F2FS_I(inode)->i_sem);327 328	if (cp_reason) {329		/* all the dirty node pages should be flushed for POR */330		ret = f2fs_sync_fs(inode->i_sb, 1);331 332		/*333		 * We've secured consistency through sync_fs. Following pino334		 * will be used only for fsynced inodes after checkpoint.335		 */336		try_to_fix_pino(inode);337		clear_inode_flag(inode, FI_APPEND_WRITE);338		clear_inode_flag(inode, FI_UPDATE_WRITE);339		goto out;340	}341sync_nodes:342	atomic_inc(&sbi->wb_sync_req[NODE]);343	ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);344	atomic_dec(&sbi->wb_sync_req[NODE]);345	if (ret)346		goto out;347 348	/* if cp_error was enabled, we should avoid infinite loop */349	if (unlikely(f2fs_cp_error(sbi))) {350		ret = -EIO;351		goto out;352	}353 354	if (f2fs_need_inode_block_update(sbi, ino)) {355		f2fs_mark_inode_dirty_sync(inode, true);356		f2fs_write_inode(inode, NULL);357		goto sync_nodes;358	}359 360	/*361	 * If it's atomic_write, it's just fine to keep write ordering. So362	 * here we don't need to wait for node write completion, since we use363	 * node chain which serializes node blocks. If one of node writes are364	 * reordered, we can see simply broken chain, resulting in stopping365	 * roll-forward recovery. It means we'll recover all or none node blocks366	 * given fsync mark.367	 */368	if (!atomic) {369		ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);370		if (ret)371			goto out;372	}373 374	/* once recovery info is written, don't need to tack this */375	f2fs_remove_ino_entry(sbi, ino, APPEND_INO);376	clear_inode_flag(inode, FI_APPEND_WRITE);377flush_out:378	if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)379		ret = f2fs_issue_flush(sbi, inode->i_ino);380	if (!ret) {381		f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);382		clear_inode_flag(inode, FI_UPDATE_WRITE);383		f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);384	}385	f2fs_update_time(sbi, REQ_TIME);386out:387	trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);388	return ret;389}390 391int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)392{393	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))394		return -EIO;395	return f2fs_do_sync_file(file, start, end, datasync, false);396}397 398static bool __found_offset(struct address_space *mapping,399		struct dnode_of_data *dn, pgoff_t index, int whence)400{401	block_t blkaddr = f2fs_data_blkaddr(dn);402	struct inode *inode = mapping->host;403	bool compressed_cluster = false;404 405	if (f2fs_compressed_file(inode)) {406		block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page,407		    ALIGN_DOWN(dn->ofs_in_node, F2FS_I(inode)->i_cluster_size));408 409		compressed_cluster = first_blkaddr == COMPRESS_ADDR;410	}411 412	switch (whence) {413	case SEEK_DATA:414		if (__is_valid_data_blkaddr(blkaddr))415			return true;416		if (blkaddr == NEW_ADDR &&417		    xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY))418			return true;419		if (compressed_cluster)420			return true;421		break;422	case SEEK_HOLE:423		if (compressed_cluster)424			return false;425		if (blkaddr == NULL_ADDR)426			return true;427		break;428	}429	return false;430}431 432static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)433{434	struct inode *inode = file->f_mapping->host;435	loff_t maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode));436	struct dnode_of_data dn;437	pgoff_t pgofs, end_offset;438	loff_t data_ofs = offset;439	loff_t isize;440	int err = 0;441 442	inode_lock_shared(inode);443 444	isize = i_size_read(inode);445	if (offset >= isize)446		goto fail;447 448	/* handle inline data case */449	if (f2fs_has_inline_data(inode)) {450		if (whence == SEEK_HOLE) {451			data_ofs = isize;452			goto found;453		} else if (whence == SEEK_DATA) {454			data_ofs = offset;455			goto found;456		}457	}458 459	pgofs = (pgoff_t)(offset >> PAGE_SHIFT);460 461	for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {462		set_new_dnode(&dn, inode, NULL, NULL, 0);463		err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);464		if (err && err != -ENOENT) {465			goto fail;466		} else if (err == -ENOENT) {467			/* direct node does not exists */468			if (whence == SEEK_DATA) {469				pgofs = f2fs_get_next_page_offset(&dn, pgofs);470				continue;471			} else {472				goto found;473			}474		}475 476		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);477 478		/* find data/hole in dnode block */479		for (; dn.ofs_in_node < end_offset;480				dn.ofs_in_node++, pgofs++,481				data_ofs = (loff_t)pgofs << PAGE_SHIFT) {482			block_t blkaddr;483 484			blkaddr = f2fs_data_blkaddr(&dn);485 486			if (__is_valid_data_blkaddr(blkaddr) &&487				!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),488					blkaddr, DATA_GENERIC_ENHANCE)) {489				f2fs_put_dnode(&dn);490				goto fail;491			}492 493			if (__found_offset(file->f_mapping, &dn,494							pgofs, whence)) {495				f2fs_put_dnode(&dn);496				goto found;497			}498		}499		f2fs_put_dnode(&dn);500	}501 502	if (whence == SEEK_DATA)503		goto fail;504found:505	if (whence == SEEK_HOLE && data_ofs > isize)506		data_ofs = isize;507	inode_unlock_shared(inode);508	return vfs_setpos(file, data_ofs, maxbytes);509fail:510	inode_unlock_shared(inode);511	return -ENXIO;512}513 514static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)515{516	struct inode *inode = file->f_mapping->host;517	loff_t maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode));518 519	switch (whence) {520	case SEEK_SET:521	case SEEK_CUR:522	case SEEK_END:523		return generic_file_llseek_size(file, offset, whence,524						maxbytes, i_size_read(inode));525	case SEEK_DATA:526	case SEEK_HOLE:527		if (offset < 0)528			return -ENXIO;529		return f2fs_seek_block(file, offset, whence);530	}531 532	return -EINVAL;533}534 535static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)536{537	struct inode *inode = file_inode(file);538 539	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))540		return -EIO;541 542	if (!f2fs_is_compress_backend_ready(inode))543		return -EOPNOTSUPP;544 545	file_accessed(file);546	vma->vm_ops = &f2fs_file_vm_ops;547 548	f2fs_down_read(&F2FS_I(inode)->i_sem);549	set_inode_flag(inode, FI_MMAP_FILE);550	f2fs_up_read(&F2FS_I(inode)->i_sem);551 552	return 0;553}554 555static int finish_preallocate_blocks(struct inode *inode)556{557	int ret;558 559	inode_lock(inode);560	if (is_inode_flag_set(inode, FI_OPENED_FILE)) {561		inode_unlock(inode);562		return 0;563	}564 565	if (!file_should_truncate(inode)) {566		set_inode_flag(inode, FI_OPENED_FILE);567		inode_unlock(inode);568		return 0;569	}570 571	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);572	filemap_invalidate_lock(inode->i_mapping);573 574	truncate_setsize(inode, i_size_read(inode));575	ret = f2fs_truncate(inode);576 577	filemap_invalidate_unlock(inode->i_mapping);578	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);579 580	if (!ret)581		set_inode_flag(inode, FI_OPENED_FILE);582 583	inode_unlock(inode);584	if (ret)585		return ret;586 587	file_dont_truncate(inode);588	return 0;589}590 591static int f2fs_file_open(struct inode *inode, struct file *filp)592{593	int err = fscrypt_file_open(inode, filp);594 595	if (err)596		return err;597 598	if (!f2fs_is_compress_backend_ready(inode))599		return -EOPNOTSUPP;600 601	err = fsverity_file_open(inode, filp);602	if (err)603		return err;604 605	filp->f_mode |= FMODE_NOWAIT;606	filp->f_mode |= FMODE_CAN_ODIRECT;607 608	err = dquot_file_open(inode, filp);609	if (err)610		return err;611 612	return finish_preallocate_blocks(inode);613}614 615void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)616{617	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);618	int nr_free = 0, ofs = dn->ofs_in_node, len = count;619	__le32 *addr;620	bool compressed_cluster = false;621	int cluster_index = 0, valid_blocks = 0;622	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;623	bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks);624 625	addr = get_dnode_addr(dn->inode, dn->node_page) + ofs;626 627	/* Assumption: truncation starts with cluster */628	for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) {629		block_t blkaddr = le32_to_cpu(*addr);630 631		if (f2fs_compressed_file(dn->inode) &&632					!(cluster_index & (cluster_size - 1))) {633			if (compressed_cluster)634				f2fs_i_compr_blocks_update(dn->inode,635							valid_blocks, false);636			compressed_cluster = (blkaddr == COMPRESS_ADDR);637			valid_blocks = 0;638		}639 640		if (blkaddr == NULL_ADDR)641			continue;642 643		f2fs_set_data_blkaddr(dn, NULL_ADDR);644 645		if (__is_valid_data_blkaddr(blkaddr)) {646			if (time_to_inject(sbi, FAULT_BLKADDR_CONSISTENCE))647				continue;648			if (!f2fs_is_valid_blkaddr_raw(sbi, blkaddr,649						DATA_GENERIC_ENHANCE))650				continue;651			if (compressed_cluster)652				valid_blocks++;653		}654 655		f2fs_invalidate_blocks(sbi, blkaddr);656 657		if (!released || blkaddr != COMPRESS_ADDR)658			nr_free++;659	}660 661	if (compressed_cluster)662		f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false);663 664	if (nr_free) {665		pgoff_t fofs;666		/*667		 * once we invalidate valid blkaddr in range [ofs, ofs + count],668		 * we will invalidate all blkaddr in the whole range.669		 */670		fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),671							dn->inode) + ofs;672		f2fs_update_read_extent_cache_range(dn, fofs, 0, len);673		f2fs_update_age_extent_cache_range(dn, fofs, len);674		dec_valid_block_count(sbi, dn->inode, nr_free);675	}676	dn->ofs_in_node = ofs;677 678	f2fs_update_time(sbi, REQ_TIME);679	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,680					 dn->ofs_in_node, nr_free);681}682 683static int truncate_partial_data_page(struct inode *inode, u64 from,684								bool cache_only)685{686	loff_t offset = from & (PAGE_SIZE - 1);687	pgoff_t index = from >> PAGE_SHIFT;688	struct address_space *mapping = inode->i_mapping;689	struct page *page;690 691	if (!offset && !cache_only)692		return 0;693 694	if (cache_only) {695		page = find_lock_page(mapping, index);696		if (page && PageUptodate(page))697			goto truncate_out;698		f2fs_put_page(page, 1);699		return 0;700	}701 702	page = f2fs_get_lock_data_page(inode, index, true);703	if (IS_ERR(page))704		return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);705truncate_out:706	f2fs_wait_on_page_writeback(page, DATA, true, true);707	zero_user(page, offset, PAGE_SIZE - offset);708 709	/* An encrypted inode should have a key and truncate the last page. */710	f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));711	if (!cache_only)712		set_page_dirty(page);713	f2fs_put_page(page, 1);714	return 0;715}716 717int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)718{719	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);720	struct dnode_of_data dn;721	pgoff_t free_from;722	int count = 0, err = 0;723	struct page *ipage;724	bool truncate_page = false;725 726	trace_f2fs_truncate_blocks_enter(inode, from);727 728	free_from = (pgoff_t)F2FS_BLK_ALIGN(from);729 730	if (free_from >= max_file_blocks(inode))731		goto free_partial;732 733	if (lock)734		f2fs_lock_op(sbi);735 736	ipage = f2fs_get_node_page(sbi, inode->i_ino);737	if (IS_ERR(ipage)) {738		err = PTR_ERR(ipage);739		goto out;740	}741 742	if (f2fs_has_inline_data(inode)) {743		f2fs_truncate_inline_inode(inode, ipage, from);744		f2fs_put_page(ipage, 1);745		truncate_page = true;746		goto out;747	}748 749	set_new_dnode(&dn, inode, ipage, NULL, 0);750	err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);751	if (err) {752		if (err == -ENOENT)753			goto free_next;754		goto out;755	}756 757	count = ADDRS_PER_PAGE(dn.node_page, inode);758 759	count -= dn.ofs_in_node;760	f2fs_bug_on(sbi, count < 0);761 762	if (dn.ofs_in_node || IS_INODE(dn.node_page)) {763		f2fs_truncate_data_blocks_range(&dn, count);764		free_from += count;765	}766 767	f2fs_put_dnode(&dn);768free_next:769	err = f2fs_truncate_inode_blocks(inode, free_from);770out:771	if (lock)772		f2fs_unlock_op(sbi);773free_partial:774	/* lastly zero out the first data page */775	if (!err)776		err = truncate_partial_data_page(inode, from, truncate_page);777 778	trace_f2fs_truncate_blocks_exit(inode, err);779	return err;780}781 782int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)783{784	u64 free_from = from;785	int err;786 787#ifdef CONFIG_F2FS_FS_COMPRESSION788	/*789	 * for compressed file, only support cluster size790	 * aligned truncation.791	 */792	if (f2fs_compressed_file(inode))793		free_from = round_up(from,794				F2FS_I(inode)->i_cluster_size << PAGE_SHIFT);795#endif796 797	err = f2fs_do_truncate_blocks(inode, free_from, lock);798	if (err)799		return err;800 801#ifdef CONFIG_F2FS_FS_COMPRESSION802	/*803	 * For compressed file, after release compress blocks, don't allow write804	 * direct, but we should allow write direct after truncate to zero.805	 */806	if (f2fs_compressed_file(inode) && !free_from807			&& is_inode_flag_set(inode, FI_COMPRESS_RELEASED))808		clear_inode_flag(inode, FI_COMPRESS_RELEASED);809 810	if (from != free_from) {811		err = f2fs_truncate_partial_cluster(inode, from, lock);812		if (err)813			return err;814	}815#endif816 817	return 0;818}819 820int f2fs_truncate(struct inode *inode)821{822	int err;823 824	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))825		return -EIO;826 827	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||828				S_ISLNK(inode->i_mode)))829		return 0;830 831	trace_f2fs_truncate(inode);832 833	if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE))834		return -EIO;835 836	err = f2fs_dquot_initialize(inode);837	if (err)838		return err;839 840	/* we should check inline_data size */841	if (!f2fs_may_inline_data(inode)) {842		err = f2fs_convert_inline_inode(inode);843		if (err)844			return err;845	}846 847	err = f2fs_truncate_blocks(inode, i_size_read(inode), true);848	if (err)849		return err;850 851	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));852	f2fs_mark_inode_dirty_sync(inode, false);853	return 0;854}855 856static bool f2fs_force_buffered_io(struct inode *inode, int rw)857{858	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);859 860	if (!fscrypt_dio_supported(inode))861		return true;862	if (fsverity_active(inode))863		return true;864	if (f2fs_compressed_file(inode))865		return true;866	if (f2fs_has_inline_data(inode))867		return true;868 869	/* disallow direct IO if any of devices has unaligned blksize */870	if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize)871		return true;872	/*873	 * for blkzoned device, fallback direct IO to buffered IO, so874	 * all IOs can be serialized by log-structured write.875	 */876	if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE) &&877	    !f2fs_is_pinned_file(inode))878		return true;879	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))880		return true;881 882	return false;883}884 885int f2fs_getattr(struct mnt_idmap *idmap, const struct path *path,886		 struct kstat *stat, u32 request_mask, unsigned int query_flags)887{888	struct inode *inode = d_inode(path->dentry);889	struct f2fs_inode_info *fi = F2FS_I(inode);890	struct f2fs_inode *ri = NULL;891	unsigned int flags;892 893	if (f2fs_has_extra_attr(inode) &&894			f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&895			F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {896		stat->result_mask |= STATX_BTIME;897		stat->btime.tv_sec = fi->i_crtime.tv_sec;898		stat->btime.tv_nsec = fi->i_crtime.tv_nsec;899	}900 901	/*902	 * Return the DIO alignment restrictions if requested.  We only return903	 * this information when requested, since on encrypted files it might904	 * take a fair bit of work to get if the file wasn't opened recently.905	 *906	 * f2fs sometimes supports DIO reads but not DIO writes.  STATX_DIOALIGN907	 * cannot represent that, so in that case we report no DIO support.908	 */909	if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) {910		unsigned int bsize = i_blocksize(inode);911 912		stat->result_mask |= STATX_DIOALIGN;913		if (!f2fs_force_buffered_io(inode, WRITE)) {914			stat->dio_mem_align = bsize;915			stat->dio_offset_align = bsize;916		}917	}918 919	flags = fi->i_flags;920	if (flags & F2FS_COMPR_FL)921		stat->attributes |= STATX_ATTR_COMPRESSED;922	if (flags & F2FS_APPEND_FL)923		stat->attributes |= STATX_ATTR_APPEND;924	if (IS_ENCRYPTED(inode))925		stat->attributes |= STATX_ATTR_ENCRYPTED;926	if (flags & F2FS_IMMUTABLE_FL)927		stat->attributes |= STATX_ATTR_IMMUTABLE;928	if (flags & F2FS_NODUMP_FL)929		stat->attributes |= STATX_ATTR_NODUMP;930	if (IS_VERITY(inode))931		stat->attributes |= STATX_ATTR_VERITY;932 933	stat->attributes_mask |= (STATX_ATTR_COMPRESSED |934				  STATX_ATTR_APPEND |935				  STATX_ATTR_ENCRYPTED |936				  STATX_ATTR_IMMUTABLE |937				  STATX_ATTR_NODUMP |938				  STATX_ATTR_VERITY);939 940	generic_fillattr(idmap, request_mask, inode, stat);941 942	/* we need to show initial sectors used for inline_data/dentries */943	if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||944					f2fs_has_inline_dentry(inode))945		stat->blocks += (stat->size + 511) >> 9;946 947	return 0;948}949 950#ifdef CONFIG_F2FS_FS_POSIX_ACL951static void __setattr_copy(struct mnt_idmap *idmap,952			   struct inode *inode, const struct iattr *attr)953{954	unsigned int ia_valid = attr->ia_valid;955 956	i_uid_update(idmap, attr, inode);957	i_gid_update(idmap, attr, inode);958	if (ia_valid & ATTR_ATIME)959		inode_set_atime_to_ts(inode, attr->ia_atime);960	if (ia_valid & ATTR_MTIME)961		inode_set_mtime_to_ts(inode, attr->ia_mtime);962	if (ia_valid & ATTR_CTIME)963		inode_set_ctime_to_ts(inode, attr->ia_ctime);964	if (ia_valid & ATTR_MODE) {965		umode_t mode = attr->ia_mode;966 967		if (!in_group_or_capable(idmap, inode, i_gid_into_vfsgid(idmap, inode)))968			mode &= ~S_ISGID;969		set_acl_inode(inode, mode);970	}971}972#else973#define __setattr_copy setattr_copy974#endif975 976int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,977		 struct iattr *attr)978{979	struct inode *inode = d_inode(dentry);980	struct f2fs_inode_info *fi = F2FS_I(inode);981	int err;982 983	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))984		return -EIO;985 986	if (unlikely(IS_IMMUTABLE(inode)))987		return -EPERM;988 989	if (unlikely(IS_APPEND(inode) &&990			(attr->ia_valid & (ATTR_MODE | ATTR_UID |991				  ATTR_GID | ATTR_TIMES_SET))))992		return -EPERM;993 994	if ((attr->ia_valid & ATTR_SIZE)) {995		if (!f2fs_is_compress_backend_ready(inode))996			return -EOPNOTSUPP;997		if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&998			!IS_ALIGNED(attr->ia_size,999			F2FS_BLK_TO_BYTES(fi->i_cluster_size)))1000			return -EINVAL;1001	}1002 1003	err = setattr_prepare(idmap, dentry, attr);1004	if (err)1005		return err;1006 1007	err = fscrypt_prepare_setattr(dentry, attr);1008	if (err)1009		return err;1010 1011	err = fsverity_prepare_setattr(dentry, attr);1012	if (err)1013		return err;1014 1015	if (is_quota_modification(idmap, inode, attr)) {1016		err = f2fs_dquot_initialize(inode);1017		if (err)1018			return err;1019	}1020	if (i_uid_needs_update(idmap, attr, inode) ||1021	    i_gid_needs_update(idmap, attr, inode)) {1022		f2fs_lock_op(F2FS_I_SB(inode));1023		err = dquot_transfer(idmap, inode, attr);1024		if (err) {1025			set_sbi_flag(F2FS_I_SB(inode),1026					SBI_QUOTA_NEED_REPAIR);1027			f2fs_unlock_op(F2FS_I_SB(inode));1028			return err;1029		}1030		/*1031		 * update uid/gid under lock_op(), so that dquot and inode can1032		 * be updated atomically.1033		 */1034		i_uid_update(idmap, attr, inode);1035		i_gid_update(idmap, attr, inode);1036		f2fs_mark_inode_dirty_sync(inode, true);1037		f2fs_unlock_op(F2FS_I_SB(inode));1038	}1039 1040	if (attr->ia_valid & ATTR_SIZE) {1041		loff_t old_size = i_size_read(inode);1042 1043		if (attr->ia_size > MAX_INLINE_DATA(inode)) {1044			/*1045			 * should convert inline inode before i_size_write to1046			 * keep smaller than inline_data size with inline flag.1047			 */1048			err = f2fs_convert_inline_inode(inode);1049			if (err)1050				return err;1051		}1052 1053		/*1054		 * wait for inflight dio, blocks should be removed after1055		 * IO completion.1056		 */1057		if (attr->ia_size < old_size)1058			inode_dio_wait(inode);1059 1060		f2fs_down_write(&fi->i_gc_rwsem[WRITE]);1061		filemap_invalidate_lock(inode->i_mapping);1062 1063		truncate_setsize(inode, attr->ia_size);1064 1065		if (attr->ia_size <= old_size)1066			err = f2fs_truncate(inode);1067		/*1068		 * do not trim all blocks after i_size if target size is1069		 * larger than i_size.1070		 */1071		filemap_invalidate_unlock(inode->i_mapping);1072		f2fs_up_write(&fi->i_gc_rwsem[WRITE]);1073		if (err)1074			return err;1075 1076		spin_lock(&fi->i_size_lock);1077		inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));1078		fi->last_disk_size = i_size_read(inode);1079		spin_unlock(&fi->i_size_lock);1080	}1081 1082	__setattr_copy(idmap, inode, attr);1083 1084	if (attr->ia_valid & ATTR_MODE) {1085		err = posix_acl_chmod(idmap, dentry, f2fs_get_inode_mode(inode));1086 1087		if (is_inode_flag_set(inode, FI_ACL_MODE)) {1088			if (!err)1089				inode->i_mode = fi->i_acl_mode;1090			clear_inode_flag(inode, FI_ACL_MODE);1091		}1092	}1093 1094	/* file size may changed here */1095	f2fs_mark_inode_dirty_sync(inode, true);1096 1097	/* inode change will produce dirty node pages flushed by checkpoint */1098	f2fs_balance_fs(F2FS_I_SB(inode), true);1099 1100	return err;1101}1102 1103const struct inode_operations f2fs_file_inode_operations = {1104	.getattr	= f2fs_getattr,1105	.setattr	= f2fs_setattr,1106	.get_inode_acl	= f2fs_get_acl,1107	.set_acl	= f2fs_set_acl,1108	.listxattr	= f2fs_listxattr,1109	.fiemap		= f2fs_fiemap,1110	.fileattr_get	= f2fs_fileattr_get,1111	.fileattr_set	= f2fs_fileattr_set,1112};1113 1114static int fill_zero(struct inode *inode, pgoff_t index,1115					loff_t start, loff_t len)1116{1117	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1118	struct page *page;1119 1120	if (!len)1121		return 0;1122 1123	f2fs_balance_fs(sbi, true);1124 1125	f2fs_lock_op(sbi);1126	page = f2fs_get_new_data_page(inode, NULL, index, false);1127	f2fs_unlock_op(sbi);1128 1129	if (IS_ERR(page))1130		return PTR_ERR(page);1131 1132	f2fs_wait_on_page_writeback(page, DATA, true, true);1133	zero_user(page, start, len);1134	set_page_dirty(page);1135	f2fs_put_page(page, 1);1136	return 0;1137}1138 1139int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)1140{1141	int err;1142 1143	while (pg_start < pg_end) {1144		struct dnode_of_data dn;1145		pgoff_t end_offset, count;1146 1147		set_new_dnode(&dn, inode, NULL, NULL, 0);1148		err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);1149		if (err) {1150			if (err == -ENOENT) {1151				pg_start = f2fs_get_next_page_offset(&dn,1152								pg_start);1153				continue;1154			}1155			return err;1156		}1157 1158		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);1159		count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);1160 1161		f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);1162 1163		f2fs_truncate_data_blocks_range(&dn, count);1164		f2fs_put_dnode(&dn);1165 1166		pg_start += count;1167	}1168	return 0;1169}1170 1171static int f2fs_punch_hole(struct inode *inode, loff_t offset, loff_t len)1172{1173	pgoff_t pg_start, pg_end;1174	loff_t off_start, off_end;1175	int ret;1176 1177	ret = f2fs_convert_inline_inode(inode);1178	if (ret)1179		return ret;1180 1181	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;1182	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;1183 1184	off_start = offset & (PAGE_SIZE - 1);1185	off_end = (offset + len) & (PAGE_SIZE - 1);1186 1187	if (pg_start == pg_end) {1188		ret = fill_zero(inode, pg_start, off_start,1189						off_end - off_start);1190		if (ret)1191			return ret;1192	} else {1193		if (off_start) {1194			ret = fill_zero(inode, pg_start++, off_start,1195						PAGE_SIZE - off_start);1196			if (ret)1197				return ret;1198		}1199		if (off_end) {1200			ret = fill_zero(inode, pg_end, 0, off_end);1201			if (ret)1202				return ret;1203		}1204 1205		if (pg_start < pg_end) {1206			loff_t blk_start, blk_end;1207			struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1208 1209			f2fs_balance_fs(sbi, true);1210 1211			blk_start = (loff_t)pg_start << PAGE_SHIFT;1212			blk_end = (loff_t)pg_end << PAGE_SHIFT;1213 1214			f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1215			filemap_invalidate_lock(inode->i_mapping);1216 1217			truncate_pagecache_range(inode, blk_start, blk_end - 1);1218 1219			f2fs_lock_op(sbi);1220			ret = f2fs_truncate_hole(inode, pg_start, pg_end);1221			f2fs_unlock_op(sbi);1222 1223			filemap_invalidate_unlock(inode->i_mapping);1224			f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1225		}1226	}1227 1228	return ret;1229}1230 1231static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,1232				int *do_replace, pgoff_t off, pgoff_t len)1233{1234	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1235	struct dnode_of_data dn;1236	int ret, done, i;1237 1238next_dnode:1239	set_new_dnode(&dn, inode, NULL, NULL, 0);1240	ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);1241	if (ret && ret != -ENOENT) {1242		return ret;1243	} else if (ret == -ENOENT) {1244		if (dn.max_level == 0)1245			return -ENOENT;1246		done = min((pgoff_t)ADDRS_PER_BLOCK(inode) -1247						dn.ofs_in_node, len);1248		blkaddr += done;1249		do_replace += done;1250		goto next;1251	}1252 1253	done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -1254							dn.ofs_in_node, len);1255	for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {1256		*blkaddr = f2fs_data_blkaddr(&dn);1257 1258		if (__is_valid_data_blkaddr(*blkaddr) &&1259			!f2fs_is_valid_blkaddr(sbi, *blkaddr,1260					DATA_GENERIC_ENHANCE)) {1261			f2fs_put_dnode(&dn);1262			return -EFSCORRUPTED;1263		}1264 1265		if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {1266 1267			if (f2fs_lfs_mode(sbi)) {1268				f2fs_put_dnode(&dn);1269				return -EOPNOTSUPP;1270			}1271 1272			/* do not invalidate this block address */1273			f2fs_update_data_blkaddr(&dn, NULL_ADDR);1274			*do_replace = 1;1275		}1276	}1277	f2fs_put_dnode(&dn);1278next:1279	len -= done;1280	off += done;1281	if (len)1282		goto next_dnode;1283	return 0;1284}1285 1286static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,1287				int *do_replace, pgoff_t off, int len)1288{1289	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1290	struct dnode_of_data dn;1291	int ret, i;1292 1293	for (i = 0; i < len; i++, do_replace++, blkaddr++) {1294		if (*do_replace == 0)1295			continue;1296 1297		set_new_dnode(&dn, inode, NULL, NULL, 0);1298		ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);1299		if (ret) {1300			dec_valid_block_count(sbi, inode, 1);1301			f2fs_invalidate_blocks(sbi, *blkaddr);1302		} else {1303			f2fs_update_data_blkaddr(&dn, *blkaddr);1304		}1305		f2fs_put_dnode(&dn);1306	}1307	return 0;1308}1309 1310static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,1311			block_t *blkaddr, int *do_replace,1312			pgoff_t src, pgoff_t dst, pgoff_t len, bool full)1313{1314	struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);1315	pgoff_t i = 0;1316	int ret;1317 1318	while (i < len) {1319		if (blkaddr[i] == NULL_ADDR && !full) {1320			i++;1321			continue;1322		}1323 1324		if (do_replace[i] || blkaddr[i] == NULL_ADDR) {1325			struct dnode_of_data dn;1326			struct node_info ni;1327			size_t new_size;1328			pgoff_t ilen;1329 1330			set_new_dnode(&dn, dst_inode, NULL, NULL, 0);1331			ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);1332			if (ret)1333				return ret;1334 1335			ret = f2fs_get_node_info(sbi, dn.nid, &ni, false);1336			if (ret) {1337				f2fs_put_dnode(&dn);1338				return ret;1339			}1340 1341			ilen = min((pgoff_t)1342				ADDRS_PER_PAGE(dn.node_page, dst_inode) -1343						dn.ofs_in_node, len - i);1344			do {1345				dn.data_blkaddr = f2fs_data_blkaddr(&dn);1346				f2fs_truncate_data_blocks_range(&dn, 1);1347 1348				if (do_replace[i]) {1349					f2fs_i_blocks_write(src_inode,1350							1, false, false);1351					f2fs_i_blocks_write(dst_inode,1352							1, true, false);1353					f2fs_replace_block(sbi, &dn, dn.data_blkaddr,1354					blkaddr[i], ni.version, true, false);1355 1356					do_replace[i] = 0;1357				}1358				dn.ofs_in_node++;1359				i++;1360				new_size = (loff_t)(dst + i) << PAGE_SHIFT;1361				if (dst_inode->i_size < new_size)1362					f2fs_i_size_write(dst_inode, new_size);1363			} while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));1364 1365			f2fs_put_dnode(&dn);1366		} else {1367			struct page *psrc, *pdst;1368 1369			psrc = f2fs_get_lock_data_page(src_inode,1370							src + i, true);1371			if (IS_ERR(psrc))1372				return PTR_ERR(psrc);1373			pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i,1374								true);1375			if (IS_ERR(pdst)) {1376				f2fs_put_page(psrc, 1);1377				return PTR_ERR(pdst);1378			}1379 1380			f2fs_wait_on_page_writeback(pdst, DATA, true, true);1381 1382			memcpy_page(pdst, 0, psrc, 0, PAGE_SIZE);1383			set_page_dirty(pdst);1384			set_page_private_gcing(pdst);1385			f2fs_put_page(pdst, 1);1386			f2fs_put_page(psrc, 1);1387 1388			ret = f2fs_truncate_hole(src_inode,1389						src + i, src + i + 1);1390			if (ret)1391				return ret;1392			i++;1393		}1394	}1395	return 0;1396}1397 1398static int __exchange_data_block(struct inode *src_inode,1399			struct inode *dst_inode, pgoff_t src, pgoff_t dst,1400			pgoff_t len, bool full)1401{1402	block_t *src_blkaddr;1403	int *do_replace;1404	pgoff_t olen;1405	int ret;1406 1407	while (len) {1408		olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);1409 1410		src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),1411					array_size(olen, sizeof(block_t)),1412					GFP_NOFS);1413		if (!src_blkaddr)1414			return -ENOMEM;1415 1416		do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),1417					array_size(olen, sizeof(int)),1418					GFP_NOFS);1419		if (!do_replace) {1420			kvfree(src_blkaddr);1421			return -ENOMEM;1422		}1423 1424		ret = __read_out_blkaddrs(src_inode, src_blkaddr,1425					do_replace, src, olen);1426		if (ret)1427			goto roll_back;1428 1429		ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,1430					do_replace, src, dst, olen, full);1431		if (ret)1432			goto roll_back;1433 1434		src += olen;1435		dst += olen;1436		len -= olen;1437 1438		kvfree(src_blkaddr);1439		kvfree(do_replace);1440	}1441	return 0;1442 1443roll_back:1444	__roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);1445	kvfree(src_blkaddr);1446	kvfree(do_replace);1447	return ret;1448}1449 1450static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)1451{1452	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1453	pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);1454	pgoff_t start = offset >> PAGE_SHIFT;1455	pgoff_t end = (offset + len) >> PAGE_SHIFT;1456	int ret;1457 1458	f2fs_balance_fs(sbi, true);1459 1460	/* avoid gc operation during block exchange */1461	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1462	filemap_invalidate_lock(inode->i_mapping);1463 1464	f2fs_lock_op(sbi);1465	f2fs_drop_extent_tree(inode);1466	truncate_pagecache(inode, offset);1467	ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);1468	f2fs_unlock_op(sbi);1469 1470	filemap_invalidate_unlock(inode->i_mapping);1471	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1472	return ret;1473}1474 1475static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)1476{1477	loff_t new_size;1478	int ret;1479 1480	if (offset + len >= i_size_read(inode))1481		return -EINVAL;1482 1483	/* collapse range should be aligned to block size of f2fs. */1484	if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))1485		return -EINVAL;1486 1487	ret = f2fs_convert_inline_inode(inode);1488	if (ret)1489		return ret;1490 1491	/* write out all dirty pages from offset */1492	ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);1493	if (ret)1494		return ret;1495 1496	ret = f2fs_do_collapse(inode, offset, len);1497	if (ret)1498		return ret;1499 1500	/* write out all moved pages, if possible */1501	filemap_invalidate_lock(inode->i_mapping);1502	filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);1503	truncate_pagecache(inode, offset);1504 1505	new_size = i_size_read(inode) - len;1506	ret = f2fs_truncate_blocks(inode, new_size, true);1507	filemap_invalidate_unlock(inode->i_mapping);1508	if (!ret)1509		f2fs_i_size_write(inode, new_size);1510	return ret;1511}1512 1513static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,1514								pgoff_t end)1515{1516	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);1517	pgoff_t index = start;1518	unsigned int ofs_in_node = dn->ofs_in_node;1519	blkcnt_t count = 0;1520	int ret;1521 1522	for (; index < end; index++, dn->ofs_in_node++) {1523		if (f2fs_data_blkaddr(dn) == NULL_ADDR)1524			count++;1525	}1526 1527	dn->ofs_in_node = ofs_in_node;1528	ret = f2fs_reserve_new_blocks(dn, count);1529	if (ret)1530		return ret;1531 1532	dn->ofs_in_node = ofs_in_node;1533	for (index = start; index < end; index++, dn->ofs_in_node++) {1534		dn->data_blkaddr = f2fs_data_blkaddr(dn);1535		/*1536		 * f2fs_reserve_new_blocks will not guarantee entire block1537		 * allocation.1538		 */1539		if (dn->data_blkaddr == NULL_ADDR) {1540			ret = -ENOSPC;1541			break;1542		}1543 1544		if (dn->data_blkaddr == NEW_ADDR)1545			continue;1546 1547		if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr,1548					DATA_GENERIC_ENHANCE)) {1549			ret = -EFSCORRUPTED;1550			break;1551		}1552 1553		f2fs_invalidate_blocks(sbi, dn->data_blkaddr);1554		f2fs_set_data_blkaddr(dn, NEW_ADDR);1555	}1556 1557	f2fs_update_read_extent_cache_range(dn, start, 0, index - start);1558	f2fs_update_age_extent_cache_range(dn, start, index - start);1559 1560	return ret;1561}1562 1563static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,1564								int mode)1565{1566	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1567	struct address_space *mapping = inode->i_mapping;1568	pgoff_t index, pg_start, pg_end;1569	loff_t new_size = i_size_read(inode);1570	loff_t off_start, off_end;1571	int ret = 0;1572 1573	ret = inode_newsize_ok(inode, (len + offset));1574	if (ret)1575		return ret;1576 1577	ret = f2fs_convert_inline_inode(inode);1578	if (ret)1579		return ret;1580 1581	ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);1582	if (ret)1583		return ret;1584 1585	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;1586	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;1587 1588	off_start = offset & (PAGE_SIZE - 1);1589	off_end = (offset + len) & (PAGE_SIZE - 1);1590 1591	if (pg_start == pg_end) {1592		ret = fill_zero(inode, pg_start, off_start,1593						off_end - off_start);1594		if (ret)1595			return ret;1596 1597		new_size = max_t(loff_t, new_size, offset + len);1598	} else {1599		if (off_start) {1600			ret = fill_zero(inode, pg_start++, off_start,1601						PAGE_SIZE - off_start);1602			if (ret)1603				return ret;1604 1605			new_size = max_t(loff_t, new_size,1606					(loff_t)pg_start << PAGE_SHIFT);1607		}1608 1609		for (index = pg_start; index < pg_end;) {1610			struct dnode_of_data dn;1611			unsigned int end_offset;1612			pgoff_t end;1613 1614			f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1615			filemap_invalidate_lock(mapping);1616 1617			truncate_pagecache_range(inode,1618				(loff_t)index << PAGE_SHIFT,1619				((loff_t)pg_end << PAGE_SHIFT) - 1);1620 1621			f2fs_lock_op(sbi);1622 1623			set_new_dnode(&dn, inode, NULL, NULL, 0);1624			ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);1625			if (ret) {1626				f2fs_unlock_op(sbi);1627				filemap_invalidate_unlock(mapping);1628				f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1629				goto out;1630			}1631 1632			end_offset = ADDRS_PER_PAGE(dn.node_page, inode);1633			end = min(pg_end, end_offset - dn.ofs_in_node + index);1634 1635			ret = f2fs_do_zero_range(&dn, index, end);1636			f2fs_put_dnode(&dn);1637 1638			f2fs_unlock_op(sbi);1639			filemap_invalidate_unlock(mapping);1640			f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1641 1642			f2fs_balance_fs(sbi, dn.node_changed);1643 1644			if (ret)1645				goto out;1646 1647			index = end;1648			new_size = max_t(loff_t, new_size,1649					(loff_t)index << PAGE_SHIFT);1650		}1651 1652		if (off_end) {1653			ret = fill_zero(inode, pg_end, 0, off_end);1654			if (ret)1655				goto out;1656 1657			new_size = max_t(loff_t, new_size, offset + len);1658		}1659	}1660 1661out:1662	if (new_size > i_size_read(inode)) {1663		if (mode & FALLOC_FL_KEEP_SIZE)1664			file_set_keep_isize(inode);1665		else1666			f2fs_i_size_write(inode, new_size);1667	}1668	return ret;1669}1670 1671static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)1672{1673	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1674	struct address_space *mapping = inode->i_mapping;1675	pgoff_t nr, pg_start, pg_end, delta, idx;1676	loff_t new_size;1677	int ret = 0;1678 1679	new_size = i_size_read(inode) + len;1680	ret = inode_newsize_ok(inode, new_size);1681	if (ret)1682		return ret;1683 1684	if (offset >= i_size_read(inode))1685		return -EINVAL;1686 1687	/* insert range should be aligned to block size of f2fs. */1688	if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))1689		return -EINVAL;1690 1691	ret = f2fs_convert_inline_inode(inode);1692	if (ret)1693		return ret;1694 1695	f2fs_balance_fs(sbi, true);1696 1697	filemap_invalidate_lock(mapping);1698	ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);1699	filemap_invalidate_unlock(mapping);1700	if (ret)1701		return ret;1702 1703	/* write out all dirty pages from offset */1704	ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);1705	if (ret)1706		return ret;1707 1708	pg_start = offset >> PAGE_SHIFT;1709	pg_end = (offset + len) >> PAGE_SHIFT;1710	delta = pg_end - pg_start;1711	idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);1712 1713	/* avoid gc operation during block exchange */1714	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1715	filemap_invalidate_lock(mapping);1716	truncate_pagecache(inode, offset);1717 1718	while (!ret && idx > pg_start) {1719		nr = idx - pg_start;1720		if (nr > delta)1721			nr = delta;1722		idx -= nr;1723 1724		f2fs_lock_op(sbi);1725		f2fs_drop_extent_tree(inode);1726 1727		ret = __exchange_data_block(inode, inode, idx,1728					idx + delta, nr, false);1729		f2fs_unlock_op(sbi);1730	}1731	filemap_invalidate_unlock(mapping);1732	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);1733	if (ret)1734		return ret;1735 1736	/* write out all moved pages, if possible */1737	filemap_invalidate_lock(mapping);1738	ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);1739	truncate_pagecache(inode, offset);1740	filemap_invalidate_unlock(mapping);1741 1742	if (!ret)1743		f2fs_i_size_write(inode, new_size);1744	return ret;1745}1746 1747static int f2fs_expand_inode_data(struct inode *inode, loff_t offset,1748					loff_t len, int mode)1749{1750	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);1751	struct f2fs_map_blocks map = { .m_next_pgofs = NULL,1752			.m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE,1753			.m_may_create = true };1754	struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,1755			.init_gc_type = FG_GC,1756			.should_migrate_blocks = false,1757			.err_gc_skipped = true,1758			.nr_free_secs = 0 };1759	pgoff_t pg_start, pg_end;1760	loff_t new_size;1761	loff_t off_end;1762	block_t expanded = 0;1763	int err;1764 1765	err = inode_newsize_ok(inode, (len + offset));1766	if (err)1767		return err;1768 1769	err = f2fs_convert_inline_inode(inode);1770	if (err)1771		return err;1772 1773	f2fs_balance_fs(sbi, true);1774 1775	pg_start = ((unsigned long long)offset) >> PAGE_SHIFT;1776	pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;1777	off_end = (offset + len) & (PAGE_SIZE - 1);1778 1779	map.m_lblk = pg_start;1780	map.m_len = pg_end - pg_start;1781	if (off_end)1782		map.m_len++;1783 1784	if (!map.m_len)1785		return 0;1786 1787	if (f2fs_is_pinned_file(inode)) {1788		block_t sec_blks = CAP_BLKS_PER_SEC(sbi);1789		block_t sec_len = roundup(map.m_len, sec_blks);1790 1791		map.m_len = sec_blks;1792next_alloc:1793		if (has_not_enough_free_secs(sbi, 0,1794			GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) {1795			f2fs_down_write(&sbi->gc_lock);1796			stat_inc_gc_call_count(sbi, FOREGROUND);1797			err = f2fs_gc(sbi, &gc_control);1798			if (err && err != -ENODATA)1799				goto out_err;1800		}1801 1802		f2fs_down_write(&sbi->pin_sem);1803 1804		err = f2fs_allocate_pinning_section(sbi);1805		if (err) {1806			f2fs_up_write(&sbi->pin_sem);1807			goto out_err;1808		}1809 1810		map.m_seg_type = CURSEG_COLD_DATA_PINNED;1811		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_DIO);1812		file_dont_truncate(inode);1813 1814		f2fs_up_write(&sbi->pin_sem);1815 1816		expanded += map.m_len;1817		sec_len -= map.m_len;1818		map.m_lblk += map.m_len;1819		if (!err && sec_len)1820			goto next_alloc;1821 1822		map.m_len = expanded;1823	} else {1824		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_AIO);1825		expanded = map.m_len;1826	}1827out_err:1828	if (err) {1829		pgoff_t last_off;1830 1831		if (!expanded)1832			return err;1833 1834		last_off = pg_start + expanded - 1;1835 1836		/* update new size to the failed position */1837		new_size = (last_off == pg_end) ? offset + len :1838					(loff_t)(last_off + 1) << PAGE_SHIFT;1839	} else {1840		new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;1841	}1842 1843	if (new_size > i_size_read(inode)) {1844		if (mode & FALLOC_FL_KEEP_SIZE)1845			file_set_keep_isize(inode);1846		else1847			f2fs_i_size_write(inode, new_size);1848	}1849 1850	return err;1851}1852 1853static long f2fs_fallocate(struct file *file, int mode,1854				loff_t offset, loff_t len)1855{1856	struct inode *inode = file_inode(file);1857	long ret = 0;1858 1859	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))1860		return -EIO;1861	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))1862		return -ENOSPC;1863	if (!f2fs_is_compress_backend_ready(inode))1864		return -EOPNOTSUPP;1865 1866	/* f2fs only support ->fallocate for regular file */1867	if (!S_ISREG(inode->i_mode))1868		return -EINVAL;1869 1870	if (IS_ENCRYPTED(inode) &&1871		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))1872		return -EOPNOTSUPP;1873 1874	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |1875			FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |1876			FALLOC_FL_INSERT_RANGE))1877		return -EOPNOTSUPP;1878 1879	inode_lock(inode);1880 1881	/*1882	 * Pinned file should not support partial truncation since the block1883	 * can be used by applications.1884	 */1885	if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&1886		(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |1887			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) {1888		ret = -EOPNOTSUPP;1889		goto out;1890	}1891 1892	ret = file_modified(file);1893	if (ret)1894		goto out;1895 1896	/*1897	 * wait for inflight dio, blocks should be removed after IO1898	 * completion.1899	 */1900	inode_dio_wait(inode);1901 1902	if (mode & FALLOC_FL_PUNCH_HOLE) {1903		if (offset >= inode->i_size)1904			goto out;1905 1906		ret = f2fs_punch_hole(inode, offset, len);1907	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {1908		ret = f2fs_collapse_range(inode, offset, len);1909	} else if (mode & FALLOC_FL_ZERO_RANGE) {1910		ret = f2fs_zero_range(inode, offset, len, mode);1911	} else if (mode & FALLOC_FL_INSERT_RANGE) {1912		ret = f2fs_insert_range(inode, offset, len);1913	} else {1914		ret = f2fs_expand_inode_data(inode, offset, len, mode);1915	}1916 1917	if (!ret) {1918		inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));1919		f2fs_mark_inode_dirty_sync(inode, false);1920		f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);1921	}1922 1923out:1924	inode_unlock(inode);1925 1926	trace_f2fs_fallocate(inode, mode, offset, len, ret);1927	return ret;1928}1929 1930static int f2fs_release_file(struct inode *inode, struct file *filp)1931{1932	/*1933	 * f2fs_release_file is called at every close calls. So we should1934	 * not drop any inmemory pages by close called by other process.1935	 */1936	if (!(filp->f_mode & FMODE_WRITE) ||1937			atomic_read(&inode->i_writecount) != 1)1938		return 0;1939 1940	inode_lock(inode);1941	f2fs_abort_atomic_write(inode, true);1942	inode_unlock(inode);1943 1944	return 0;1945}1946 1947static int f2fs_file_flush(struct file *file, fl_owner_t id)1948{1949	struct inode *inode = file_inode(file);1950 1951	/*1952	 * If the process doing a transaction is crashed, we should do1953	 * roll-back. Otherwise, other reader/write can see corrupted database1954	 * until all the writers close its file. Since this should be done1955	 * before dropping file lock, it needs to do in ->flush.1956	 */1957	if (F2FS_I(inode)->atomic_write_task == current &&1958				(current->flags & PF_EXITING)) {1959		inode_lock(inode);1960		f2fs_abort_atomic_write(inode, true);1961		inode_unlock(inode);1962	}1963 1964	return 0;1965}1966 1967static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)1968{1969	struct f2fs_inode_info *fi = F2FS_I(inode);1970	u32 masked_flags = fi->i_flags & mask;1971 1972	/* mask can be shrunk by flags_valid selector */1973	iflags &= mask;1974 1975	/* Is it quota file? Do not allow user to mess with it */1976	if (IS_NOQUOTA(inode))1977		return -EPERM;1978 1979	if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) {1980		if (!f2fs_sb_has_casefold(F2FS_I_SB(inode)))1981			return -EOPNOTSUPP;1982		if (!f2fs_empty_dir(inode))1983			return -ENOTEMPTY;1984	}1985 1986	if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) {1987		if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))1988			return -EOPNOTSUPP;1989		if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL))1990			return -EINVAL;1991	}1992 1993	if ((iflags ^ masked_flags) & F2FS_COMPR_FL) {1994		if (masked_flags & F2FS_COMPR_FL) {1995			if (!f2fs_disable_compressed_file(inode))1996				return -EINVAL;1997		} else {1998			/* try to convert inline_data to support compression */1999			int err = f2fs_convert_inline_inode(inode);2000			if (err)2001				return err;2002 2003			f2fs_down_write(&fi->i_sem);2004			if (!f2fs_may_compress(inode) ||2005					(S_ISREG(inode->i_mode) &&2006					F2FS_HAS_BLOCKS(inode))) {2007				f2fs_up_write(&fi->i_sem);2008				return -EINVAL;2009			}2010			err = set_compress_context(inode);2011			f2fs_up_write(&fi->i_sem);2012 2013			if (err)2014				return err;2015		}2016	}2017 2018	fi->i_flags = iflags | (fi->i_flags & ~mask);2019	f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) &&2020					(fi->i_flags & F2FS_NOCOMP_FL));2021 2022	if (fi->i_flags & F2FS_PROJINHERIT_FL)2023		set_inode_flag(inode, FI_PROJ_INHERIT);2024	else2025		clear_inode_flag(inode, FI_PROJ_INHERIT);2026 2027	inode_set_ctime_current(inode);2028	f2fs_set_inode_flags(inode);2029	f2fs_mark_inode_dirty_sync(inode, true);2030	return 0;2031}2032 2033/* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */2034 2035/*2036 * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry2037 * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to2038 * F2FS_GETTABLE_FS_FL.  To also make it settable via FS_IOC_SETFLAGS, also add2039 * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.2040 *2041 * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and2042 * FS_IOC_FSSETXATTR is done by the VFS.2043 */2044 2045static const struct {2046	u32 iflag;2047	u32 fsflag;2048} f2fs_fsflags_map[] = {2049	{ F2FS_COMPR_FL,	FS_COMPR_FL },2050	{ F2FS_SYNC_FL,		FS_SYNC_FL },2051	{ F2FS_IMMUTABLE_FL,	FS_IMMUTABLE_FL },2052	{ F2FS_APPEND_FL,	FS_APPEND_FL },2053	{ F2FS_NODUMP_FL,	FS_NODUMP_FL },2054	{ F2FS_NOATIME_FL,	FS_NOATIME_FL },2055	{ F2FS_NOCOMP_FL,	FS_NOCOMP_FL },2056	{ F2FS_INDEX_FL,	FS_INDEX_FL },2057	{ F2FS_DIRSYNC_FL,	FS_DIRSYNC_FL },2058	{ F2FS_PROJINHERIT_FL,	FS_PROJINHERIT_FL },2059	{ F2FS_CASEFOLD_FL,	FS_CASEFOLD_FL },2060};2061 2062#define F2FS_GETTABLE_FS_FL (		\2063		FS_COMPR_FL |		\2064		FS_SYNC_FL |		\2065		FS_IMMUTABLE_FL |	\2066		FS_APPEND_FL |		\2067		FS_NODUMP_FL |		\2068		FS_NOATIME_FL |		\2069		FS_NOCOMP_FL |		\2070		FS_INDEX_FL |		\2071		FS_DIRSYNC_FL |		\2072		FS_PROJINHERIT_FL |	\2073		FS_ENCRYPT_FL |		\2074		FS_INLINE_DATA_FL |	\2075		FS_NOCOW_FL |		\2076		FS_VERITY_FL |		\2077		FS_CASEFOLD_FL)2078 2079#define F2FS_SETTABLE_FS_FL (		\2080		FS_COMPR_FL |		\2081		FS_SYNC_FL |		\2082		FS_IMMUTABLE_FL |	\2083		FS_APPEND_FL |		\2084		FS_NODUMP_FL |		\2085		FS_NOATIME_FL |		\2086		FS_NOCOMP_FL |		\2087		FS_DIRSYNC_FL |		\2088		FS_PROJINHERIT_FL |	\2089		FS_CASEFOLD_FL)2090 2091/* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */2092static inline u32 f2fs_iflags_to_fsflags(u32 iflags)2093{2094	u32 fsflags = 0;2095	int i;2096 2097	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)2098		if (iflags & f2fs_fsflags_map[i].iflag)2099			fsflags |= f2fs_fsflags_map[i].fsflag;2100 2101	return fsflags;2102}2103 2104/* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */2105static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)2106{2107	u32 iflags = 0;2108	int i;2109 2110	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)2111		if (fsflags & f2fs_fsflags_map[i].fsflag)2112			iflags |= f2fs_fsflags_map[i].iflag;2113 2114	return iflags;2115}2116 2117static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)2118{2119	struct inode *inode = file_inode(filp);2120 2121	return put_user(inode->i_generation, (int __user *)arg);2122}2123 2124static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)2125{2126	struct inode *inode = file_inode(filp);2127	struct mnt_idmap *idmap = file_mnt_idmap(filp);2128	struct f2fs_inode_info *fi = F2FS_I(inode);2129	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2130	loff_t isize;2131	int ret;2132 2133	if (!(filp->f_mode & FMODE_WRITE))2134		return -EBADF;2135 2136	if (!inode_owner_or_capable(idmap, inode))2137		return -EACCES;2138 2139	if (!S_ISREG(inode->i_mode))2140		return -EINVAL;2141 2142	if (filp->f_flags & O_DIRECT)2143		return -EINVAL;2144 2145	ret = mnt_want_write_file(filp);2146	if (ret)2147		return ret;2148 2149	inode_lock(inode);2150 2151	if (!f2fs_disable_compressed_file(inode) ||2152			f2fs_is_pinned_file(inode)) {2153		ret = -EINVAL;2154		goto out;2155	}2156 2157	if (f2fs_is_atomic_file(inode))2158		goto out;2159 2160	ret = f2fs_convert_inline_inode(inode);2161	if (ret)2162		goto out;2163 2164	f2fs_down_write(&fi->i_gc_rwsem[WRITE]);2165	f2fs_down_write(&fi->i_gc_rwsem[READ]);2166 2167	/*2168	 * Should wait end_io to count F2FS_WB_CP_DATA correctly by2169	 * f2fs_is_atomic_file.2170	 */2171	if (get_dirty_pages(inode))2172		f2fs_warn(sbi, "Unexpected flush for atomic writes: ino=%lu, npages=%u",2173			  inode->i_ino, get_dirty_pages(inode));2174	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);2175	if (ret)2176		goto out_unlock;2177 2178	/* Check if the inode already has a COW inode */2179	if (fi->cow_inode == NULL) {2180		/* Create a COW inode for atomic write */2181		struct dentry *dentry = file_dentry(filp);2182		struct inode *dir = d_inode(dentry->d_parent);2183 2184		ret = f2fs_get_tmpfile(idmap, dir, &fi->cow_inode);2185		if (ret)2186			goto out_unlock;2187 2188		set_inode_flag(fi->cow_inode, FI_COW_FILE);2189		clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);2190 2191		/* Set the COW inode's atomic_inode to the atomic inode */2192		F2FS_I(fi->cow_inode)->atomic_inode = inode;2193	} else {2194		/* Reuse the already created COW inode */2195		f2fs_bug_on(sbi, get_dirty_pages(fi->cow_inode));2196 2197		invalidate_mapping_pages(fi->cow_inode->i_mapping, 0, -1);2198 2199		ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);2200		if (ret)2201			goto out_unlock;2202	}2203 2204	f2fs_write_inode(inode, NULL);2205 2206	stat_inc_atomic_inode(inode);2207 2208	set_inode_flag(inode, FI_ATOMIC_FILE);2209 2210	isize = i_size_read(inode);2211	fi->original_i_size = isize;2212	if (truncate) {2213		set_inode_flag(inode, FI_ATOMIC_REPLACE);2214		truncate_inode_pages_final(inode->i_mapping);2215		f2fs_i_size_write(inode, 0);2216		isize = 0;2217	}2218	f2fs_i_size_write(fi->cow_inode, isize);2219 2220out_unlock:2221	f2fs_up_write(&fi->i_gc_rwsem[READ]);2222	f2fs_up_write(&fi->i_gc_rwsem[WRITE]);2223	if (ret)2224		goto out;2225 2226	f2fs_update_time(sbi, REQ_TIME);2227	fi->atomic_write_task = current;2228	stat_update_max_atomic_write(inode);2229	fi->atomic_write_cnt = 0;2230out:2231	inode_unlock(inode);2232	mnt_drop_write_file(filp);2233	return ret;2234}2235 2236static int f2fs_ioc_commit_atomic_write(struct file *filp)2237{2238	struct inode *inode = file_inode(filp);2239	struct mnt_idmap *idmap = file_mnt_idmap(filp);2240	int ret;2241 2242	if (!(filp->f_mode & FMODE_WRITE))2243		return -EBADF;2244 2245	if (!inode_owner_or_capable(idmap, inode))2246		return -EACCES;2247 2248	ret = mnt_want_write_file(filp);2249	if (ret)2250		return ret;2251 2252	f2fs_balance_fs(F2FS_I_SB(inode), true);2253 2254	inode_lock(inode);2255 2256	if (f2fs_is_atomic_file(inode)) {2257		ret = f2fs_commit_atomic_write(inode);2258		if (!ret)2259			ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);2260 2261		f2fs_abort_atomic_write(inode, ret);2262	} else {2263		ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);2264	}2265 2266	inode_unlock(inode);2267	mnt_drop_write_file(filp);2268	return ret;2269}2270 2271static int f2fs_ioc_abort_atomic_write(struct file *filp)2272{2273	struct inode *inode = file_inode(filp);2274	struct mnt_idmap *idmap = file_mnt_idmap(filp);2275	int ret;2276 2277	if (!(filp->f_mode & FMODE_WRITE))2278		return -EBADF;2279 2280	if (!inode_owner_or_capable(idmap, inode))2281		return -EACCES;2282 2283	ret = mnt_want_write_file(filp);2284	if (ret)2285		return ret;2286 2287	inode_lock(inode);2288 2289	f2fs_abort_atomic_write(inode, true);2290 2291	inode_unlock(inode);2292 2293	mnt_drop_write_file(filp);2294	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);2295	return ret;2296}2297 2298int f2fs_do_shutdown(struct f2fs_sb_info *sbi, unsigned int flag,2299						bool readonly, bool need_lock)2300{2301	struct super_block *sb = sbi->sb;2302	int ret = 0;2303 2304	switch (flag) {2305	case F2FS_GOING_DOWN_FULLSYNC:2306		ret = bdev_freeze(sb->s_bdev);2307		if (ret)2308			goto out;2309		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);2310		bdev_thaw(sb->s_bdev);2311		break;2312	case F2FS_GOING_DOWN_METASYNC:2313		/* do checkpoint only */2314		ret = f2fs_sync_fs(sb, 1);2315		if (ret) {2316			if (ret == -EIO)2317				ret = 0;2318			goto out;2319		}2320		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);2321		break;2322	case F2FS_GOING_DOWN_NOSYNC:2323		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);2324		break;2325	case F2FS_GOING_DOWN_METAFLUSH:2326		f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);2327		f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);2328		break;2329	case F2FS_GOING_DOWN_NEED_FSCK:2330		set_sbi_flag(sbi, SBI_NEED_FSCK);2331		set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);2332		set_sbi_flag(sbi, SBI_IS_DIRTY);2333		/* do checkpoint only */2334		ret = f2fs_sync_fs(sb, 1);2335		if (ret == -EIO)2336			ret = 0;2337		goto out;2338	default:2339		ret = -EINVAL;2340		goto out;2341	}2342 2343	if (readonly)2344		goto out;2345 2346	/* grab sb->s_umount to avoid racing w/ remount() */2347	if (need_lock)2348		down_read(&sbi->sb->s_umount);2349 2350	f2fs_stop_gc_thread(sbi);2351	f2fs_stop_discard_thread(sbi);2352 2353	f2fs_drop_discard_cmd(sbi);2354	clear_opt(sbi, DISCARD);2355 2356	if (need_lock)2357		up_read(&sbi->sb->s_umount);2358 2359	f2fs_update_time(sbi, REQ_TIME);2360out:2361 2362	trace_f2fs_shutdown(sbi, flag, ret);2363 2364	return ret;2365}2366 2367static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)2368{2369	struct inode *inode = file_inode(filp);2370	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2371	__u32 in;2372	int ret;2373	bool need_drop = false, readonly = false;2374 2375	if (!capable(CAP_SYS_ADMIN))2376		return -EPERM;2377 2378	if (get_user(in, (__u32 __user *)arg))2379		return -EFAULT;2380 2381	if (in != F2FS_GOING_DOWN_FULLSYNC) {2382		ret = mnt_want_write_file(filp);2383		if (ret) {2384			if (ret != -EROFS)2385				return ret;2386 2387			/* fallback to nosync shutdown for readonly fs */2388			in = F2FS_GOING_DOWN_NOSYNC;2389			readonly = true;2390		} else {2391			need_drop = true;2392		}2393	}2394 2395	ret = f2fs_do_shutdown(sbi, in, readonly, true);2396 2397	if (need_drop)2398		mnt_drop_write_file(filp);2399 2400	return ret;2401}2402 2403static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)2404{2405	struct inode *inode = file_inode(filp);2406	struct super_block *sb = inode->i_sb;2407	struct fstrim_range range;2408	int ret;2409 2410	if (!capable(CAP_SYS_ADMIN))2411		return -EPERM;2412 2413	if (!f2fs_hw_support_discard(F2FS_SB(sb)))2414		return -EOPNOTSUPP;2415 2416	if (copy_from_user(&range, (struct fstrim_range __user *)arg,2417				sizeof(range)))2418		return -EFAULT;2419 2420	ret = mnt_want_write_file(filp);2421	if (ret)2422		return ret;2423 2424	range.minlen = max((unsigned int)range.minlen,2425			   bdev_discard_granularity(sb->s_bdev));2426	ret = f2fs_trim_fs(F2FS_SB(sb), &range);2427	mnt_drop_write_file(filp);2428	if (ret < 0)2429		return ret;2430 2431	if (copy_to_user((struct fstrim_range __user *)arg, &range,2432				sizeof(range)))2433		return -EFAULT;2434	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);2435	return 0;2436}2437 2438static bool uuid_is_nonzero(__u8 u[16])2439{2440	int i;2441 2442	for (i = 0; i < 16; i++)2443		if (u[i])2444			return true;2445	return false;2446}2447 2448static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)2449{2450	struct inode *inode = file_inode(filp);2451	int ret;2452 2453	if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))2454		return -EOPNOTSUPP;2455 2456	ret = fscrypt_ioctl_set_policy(filp, (const void __user *)arg);2457	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);2458	return ret;2459}2460 2461static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)2462{2463	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2464		return -EOPNOTSUPP;2465	return fscrypt_ioctl_get_policy(filp, (void __user *)arg);2466}2467 2468static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)2469{2470	struct inode *inode = file_inode(filp);2471	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2472	u8 encrypt_pw_salt[16];2473	int err;2474 2475	if (!f2fs_sb_has_encrypt(sbi))2476		return -EOPNOTSUPP;2477 2478	err = mnt_want_write_file(filp);2479	if (err)2480		return err;2481 2482	f2fs_down_write(&sbi->sb_lock);2483 2484	if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))2485		goto got_it;2486 2487	/* update superblock with uuid */2488	generate_random_uuid(sbi->raw_super->encrypt_pw_salt);2489 2490	err = f2fs_commit_super(sbi, false);2491	if (err) {2492		/* undo new data */2493		memset(sbi->raw_super->encrypt_pw_salt, 0, 16);2494		goto out_err;2495	}2496got_it:2497	memcpy(encrypt_pw_salt, sbi->raw_super->encrypt_pw_salt, 16);2498out_err:2499	f2fs_up_write(&sbi->sb_lock);2500	mnt_drop_write_file(filp);2501 2502	if (!err && copy_to_user((__u8 __user *)arg, encrypt_pw_salt, 16))2503		err = -EFAULT;2504 2505	return err;2506}2507 2508static int f2fs_ioc_get_encryption_policy_ex(struct file *filp,2509					     unsigned long arg)2510{2511	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2512		return -EOPNOTSUPP;2513 2514	return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);2515}2516 2517static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg)2518{2519	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2520		return -EOPNOTSUPP;2521 2522	return fscrypt_ioctl_add_key(filp, (void __user *)arg);2523}2524 2525static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg)2526{2527	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2528		return -EOPNOTSUPP;2529 2530	return fscrypt_ioctl_remove_key(filp, (void __user *)arg);2531}2532 2533static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp,2534						    unsigned long arg)2535{2536	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2537		return -EOPNOTSUPP;2538 2539	return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg);2540}2541 2542static int f2fs_ioc_get_encryption_key_status(struct file *filp,2543					      unsigned long arg)2544{2545	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2546		return -EOPNOTSUPP;2547 2548	return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);2549}2550 2551static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg)2552{2553	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))2554		return -EOPNOTSUPP;2555 2556	return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);2557}2558 2559static int f2fs_ioc_gc(struct file *filp, unsigned long arg)2560{2561	struct inode *inode = file_inode(filp);2562	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2563	struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,2564			.no_bg_gc = false,2565			.should_migrate_blocks = false,2566			.nr_free_secs = 0 };2567	__u32 sync;2568	int ret;2569 2570	if (!capable(CAP_SYS_ADMIN))2571		return -EPERM;2572 2573	if (get_user(sync, (__u32 __user *)arg))2574		return -EFAULT;2575 2576	if (f2fs_readonly(sbi->sb))2577		return -EROFS;2578 2579	ret = mnt_want_write_file(filp);2580	if (ret)2581		return ret;2582 2583	if (!sync) {2584		if (!f2fs_down_write_trylock(&sbi->gc_lock)) {2585			ret = -EBUSY;2586			goto out;2587		}2588	} else {2589		f2fs_down_write(&sbi->gc_lock);2590	}2591 2592	gc_control.init_gc_type = sync ? FG_GC : BG_GC;2593	gc_control.err_gc_skipped = sync;2594	stat_inc_gc_call_count(sbi, FOREGROUND);2595	ret = f2fs_gc(sbi, &gc_control);2596out:2597	mnt_drop_write_file(filp);2598	return ret;2599}2600 2601static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range)2602{2603	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));2604	struct f2fs_gc_control gc_control = {2605			.init_gc_type = range->sync ? FG_GC : BG_GC,2606			.no_bg_gc = false,2607			.should_migrate_blocks = false,2608			.err_gc_skipped = range->sync,2609			.nr_free_secs = 0 };2610	u64 end;2611	int ret;2612 2613	if (!capable(CAP_SYS_ADMIN))2614		return -EPERM;2615	if (f2fs_readonly(sbi->sb))2616		return -EROFS;2617 2618	end = range->start + range->len;2619	if (end < range->start || range->start < MAIN_BLKADDR(sbi) ||2620					end >= MAX_BLKADDR(sbi))2621		return -EINVAL;2622 2623	ret = mnt_want_write_file(filp);2624	if (ret)2625		return ret;2626 2627do_more:2628	if (!range->sync) {2629		if (!f2fs_down_write_trylock(&sbi->gc_lock)) {2630			ret = -EBUSY;2631			goto out;2632		}2633	} else {2634		f2fs_down_write(&sbi->gc_lock);2635	}2636 2637	gc_control.victim_segno = GET_SEGNO(sbi, range->start);2638	stat_inc_gc_call_count(sbi, FOREGROUND);2639	ret = f2fs_gc(sbi, &gc_control);2640	if (ret) {2641		if (ret == -EBUSY)2642			ret = -EAGAIN;2643		goto out;2644	}2645	range->start += CAP_BLKS_PER_SEC(sbi);2646	if (range->start <= end)2647		goto do_more;2648out:2649	mnt_drop_write_file(filp);2650	return ret;2651}2652 2653static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)2654{2655	struct f2fs_gc_range range;2656 2657	if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,2658							sizeof(range)))2659		return -EFAULT;2660	return __f2fs_ioc_gc_range(filp, &range);2661}2662 2663static int f2fs_ioc_write_checkpoint(struct file *filp)2664{2665	struct inode *inode = file_inode(filp);2666	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2667	int ret;2668 2669	if (!capable(CAP_SYS_ADMIN))2670		return -EPERM;2671 2672	if (f2fs_readonly(sbi->sb))2673		return -EROFS;2674 2675	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {2676		f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");2677		return -EINVAL;2678	}2679 2680	ret = mnt_want_write_file(filp);2681	if (ret)2682		return ret;2683 2684	ret = f2fs_sync_fs(sbi->sb, 1);2685 2686	mnt_drop_write_file(filp);2687	return ret;2688}2689 2690static int f2fs_defragment_range(struct f2fs_sb_info *sbi,2691					struct file *filp,2692					struct f2fs_defragment *range)2693{2694	struct inode *inode = file_inode(filp);2695	struct f2fs_map_blocks map = { .m_next_extent = NULL,2696					.m_seg_type = NO_CHECK_TYPE,2697					.m_may_create = false };2698	struct extent_info ei = {};2699	pgoff_t pg_start, pg_end, next_pgofs;2700	unsigned int total = 0, sec_num;2701	block_t blk_end = 0;2702	bool fragmented = false;2703	int err;2704 2705	f2fs_balance_fs(sbi, true);2706 2707	inode_lock(inode);2708	pg_start = range->start >> PAGE_SHIFT;2709	pg_end = min_t(pgoff_t,2710				(range->start + range->len) >> PAGE_SHIFT,2711				DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE));2712 2713	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) ||2714		f2fs_is_atomic_file(inode)) {2715		err = -EINVAL;2716		goto unlock_out;2717	}2718 2719	/* if in-place-update policy is enabled, don't waste time here */2720	set_inode_flag(inode, FI_OPU_WRITE);2721	if (f2fs_should_update_inplace(inode, NULL)) {2722		err = -EINVAL;2723		goto out;2724	}2725 2726	/* writeback all dirty pages in the range */2727	err = filemap_write_and_wait_range(inode->i_mapping,2728						pg_start << PAGE_SHIFT,2729						(pg_end << PAGE_SHIFT) - 1);2730	if (err)2731		goto out;2732 2733	/*2734	 * lookup mapping info in extent cache, skip defragmenting if physical2735	 * block addresses are continuous.2736	 */2737	if (f2fs_lookup_read_extent_cache(inode, pg_start, &ei)) {2738		if ((pgoff_t)ei.fofs + ei.len >= pg_end)2739			goto out;2740	}2741 2742	map.m_lblk = pg_start;2743	map.m_next_pgofs = &next_pgofs;2744 2745	/*2746	 * lookup mapping info in dnode page cache, skip defragmenting if all2747	 * physical block addresses are continuous even if there are hole(s)2748	 * in logical blocks.2749	 */2750	while (map.m_lblk < pg_end) {2751		map.m_len = pg_end - map.m_lblk;2752		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);2753		if (err)2754			goto out;2755 2756		if (!(map.m_flags & F2FS_MAP_FLAGS)) {2757			map.m_lblk = next_pgofs;2758			continue;2759		}2760 2761		if (blk_end && blk_end != map.m_pblk)2762			fragmented = true;2763 2764		/* record total count of block that we're going to move */2765		total += map.m_len;2766 2767		blk_end = map.m_pblk + map.m_len;2768 2769		map.m_lblk += map.m_len;2770	}2771 2772	if (!fragmented) {2773		total = 0;2774		goto out;2775	}2776 2777	sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi));2778 2779	/*2780	 * make sure there are enough free section for LFS allocation, this can2781	 * avoid defragment running in SSR mode when free section are allocated2782	 * intensively2783	 */2784	if (has_not_enough_free_secs(sbi, 0, sec_num)) {2785		err = -EAGAIN;2786		goto out;2787	}2788 2789	map.m_lblk = pg_start;2790	map.m_len = pg_end - pg_start;2791	total = 0;2792 2793	while (map.m_lblk < pg_end) {2794		pgoff_t idx;2795		int cnt = 0;2796 2797do_map:2798		map.m_len = pg_end - map.m_lblk;2799		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);2800		if (err)2801			goto clear_out;2802 2803		if (!(map.m_flags & F2FS_MAP_FLAGS)) {2804			map.m_lblk = next_pgofs;2805			goto check;2806		}2807 2808		set_inode_flag(inode, FI_SKIP_WRITES);2809 2810		idx = map.m_lblk;2811		while (idx < map.m_lblk + map.m_len &&2812						cnt < BLKS_PER_SEG(sbi)) {2813			struct page *page;2814 2815			page = f2fs_get_lock_data_page(inode, idx, true);2816			if (IS_ERR(page)) {2817				err = PTR_ERR(page);2818				goto clear_out;2819			}2820 2821			f2fs_wait_on_page_writeback(page, DATA, true, true);2822 2823			set_page_dirty(page);2824			set_page_private_gcing(page);2825			f2fs_put_page(page, 1);2826 2827			idx++;2828			cnt++;2829			total++;2830		}2831 2832		map.m_lblk = idx;2833check:2834		if (map.m_lblk < pg_end && cnt < BLKS_PER_SEG(sbi))2835			goto do_map;2836 2837		clear_inode_flag(inode, FI_SKIP_WRITES);2838 2839		err = filemap_fdatawrite(inode->i_mapping);2840		if (err)2841			goto out;2842	}2843clear_out:2844	clear_inode_flag(inode, FI_SKIP_WRITES);2845out:2846	clear_inode_flag(inode, FI_OPU_WRITE);2847unlock_out:2848	inode_unlock(inode);2849	if (!err)2850		range->len = (u64)total << PAGE_SHIFT;2851	return err;2852}2853 2854static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)2855{2856	struct inode *inode = file_inode(filp);2857	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);2858	struct f2fs_defragment range;2859	int err;2860 2861	if (!capable(CAP_SYS_ADMIN))2862		return -EPERM;2863 2864	if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))2865		return -EINVAL;2866 2867	if (f2fs_readonly(sbi->sb))2868		return -EROFS;2869 2870	if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,2871							sizeof(range)))2872		return -EFAULT;2873 2874	/* verify alignment of offset & size */2875	if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))2876		return -EINVAL;2877 2878	if (unlikely((range.start + range.len) >> PAGE_SHIFT >2879					max_file_blocks(inode)))2880		return -EINVAL;2881 2882	err = mnt_want_write_file(filp);2883	if (err)2884		return err;2885 2886	err = f2fs_defragment_range(sbi, filp, &range);2887	mnt_drop_write_file(filp);2888 2889	if (range.len)2890		f2fs_update_time(sbi, REQ_TIME);2891	if (err < 0)2892		return err;2893 2894	if (copy_to_user((struct f2fs_defragment __user *)arg, &range,2895							sizeof(range)))2896		return -EFAULT;2897 2898	return 0;2899}2900 2901static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,2902			struct file *file_out, loff_t pos_out, size_t len)2903{2904	struct inode *src = file_inode(file_in);2905	struct inode *dst = file_inode(file_out);2906	struct f2fs_sb_info *sbi = F2FS_I_SB(src);2907	size_t olen = len, dst_max_i_size = 0;2908	size_t dst_osize;2909	int ret;2910 2911	if (file_in->f_path.mnt != file_out->f_path.mnt ||2912				src->i_sb != dst->i_sb)2913		return -EXDEV;2914 2915	if (unlikely(f2fs_readonly(src->i_sb)))2916		return -EROFS;2917 2918	if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))2919		return -EINVAL;2920 2921	if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))2922		return -EOPNOTSUPP;2923 2924	if (pos_out < 0 || pos_in < 0)2925		return -EINVAL;2926 2927	if (src == dst) {2928		if (pos_in == pos_out)2929			return 0;2930		if (pos_out > pos_in && pos_out < pos_in + len)2931			return -EINVAL;2932	}2933 2934	inode_lock(src);2935	if (src != dst) {2936		ret = -EBUSY;2937		if (!inode_trylock(dst))2938			goto out;2939	}2940 2941	if (f2fs_compressed_file(src) || f2fs_compressed_file(dst) ||2942		f2fs_is_pinned_file(src) || f2fs_is_pinned_file(dst)) {2943		ret = -EOPNOTSUPP;2944		goto out_unlock;2945	}2946 2947	if (f2fs_is_atomic_file(src) || f2fs_is_atomic_file(dst)) {2948		ret = -EINVAL;2949		goto out_unlock;2950	}2951 2952	ret = -EINVAL;2953	if (pos_in + len > src->i_size || pos_in + len < pos_in)2954		goto out_unlock;2955	if (len == 0)2956		olen = len = src->i_size - pos_in;2957	if (pos_in + len == src->i_size)2958		len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;2959	if (len == 0) {2960		ret = 0;2961		goto out_unlock;2962	}2963 2964	dst_osize = dst->i_size;2965	if (pos_out + olen > dst->i_size)2966		dst_max_i_size = pos_out + olen;2967 2968	/* verify the end result is block aligned */2969	if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||2970			!IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||2971			!IS_ALIGNED(pos_out, F2FS_BLKSIZE))2972		goto out_unlock;2973 2974	ret = f2fs_convert_inline_inode(src);2975	if (ret)2976		goto out_unlock;2977 2978	ret = f2fs_convert_inline_inode(dst);2979	if (ret)2980		goto out_unlock;2981 2982	/* write out all dirty pages from offset */2983	ret = filemap_write_and_wait_range(src->i_mapping,2984					pos_in, pos_in + len);2985	if (ret)2986		goto out_unlock;2987 2988	ret = filemap_write_and_wait_range(dst->i_mapping,2989					pos_out, pos_out + len);2990	if (ret)2991		goto out_unlock;2992 2993	f2fs_balance_fs(sbi, true);2994 2995	f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);2996	if (src != dst) {2997		ret = -EBUSY;2998		if (!f2fs_down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))2999			goto out_src;3000	}3001 3002	f2fs_lock_op(sbi);3003	ret = __exchange_data_block(src, dst, F2FS_BYTES_TO_BLK(pos_in),3004				F2FS_BYTES_TO_BLK(pos_out),3005				F2FS_BYTES_TO_BLK(len), false);3006 3007	if (!ret) {3008		if (dst_max_i_size)3009			f2fs_i_size_write(dst, dst_max_i_size);3010		else if (dst_osize != dst->i_size)3011			f2fs_i_size_write(dst, dst_osize);3012	}3013	f2fs_unlock_op(sbi);3014 3015	if (src != dst)3016		f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);3017out_src:3018	f2fs_up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);3019	if (ret)3020		goto out_unlock;3021 3022	inode_set_mtime_to_ts(src, inode_set_ctime_current(src));3023	f2fs_mark_inode_dirty_sync(src, false);3024	if (src != dst) {3025		inode_set_mtime_to_ts(dst, inode_set_ctime_current(dst));3026		f2fs_mark_inode_dirty_sync(dst, false);3027	}3028	f2fs_update_time(sbi, REQ_TIME);3029 3030out_unlock:3031	if (src != dst)3032		inode_unlock(dst);3033out:3034	inode_unlock(src);3035	return ret;3036}3037 3038static int __f2fs_ioc_move_range(struct file *filp,3039				struct f2fs_move_range *range)3040{3041	struct fd dst;3042	int err;3043 3044	if (!(filp->f_mode & FMODE_READ) ||3045			!(filp->f_mode & FMODE_WRITE))3046		return -EBADF;3047 3048	dst = fdget(range->dst_fd);3049	if (!fd_file(dst))3050		return -EBADF;3051 3052	if (!(fd_file(dst)->f_mode & FMODE_WRITE)) {3053		err = -EBADF;3054		goto err_out;3055	}3056 3057	err = mnt_want_write_file(filp);3058	if (err)3059		goto err_out;3060 3061	err = f2fs_move_file_range(filp, range->pos_in, fd_file(dst),3062					range->pos_out, range->len);3063 3064	mnt_drop_write_file(filp);3065err_out:3066	fdput(dst);3067	return err;3068}3069 3070static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)3071{3072	struct f2fs_move_range range;3073 3074	if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,3075							sizeof(range)))3076		return -EFAULT;3077	return __f2fs_ioc_move_range(filp, &range);3078}3079 3080static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)3081{3082	struct inode *inode = file_inode(filp);3083	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3084	struct sit_info *sm = SIT_I(sbi);3085	unsigned int start_segno = 0, end_segno = 0;3086	unsigned int dev_start_segno = 0, dev_end_segno = 0;3087	struct f2fs_flush_device range;3088	struct f2fs_gc_control gc_control = {3089			.init_gc_type = FG_GC,3090			.should_migrate_blocks = true,3091			.err_gc_skipped = true,3092			.nr_free_secs = 0 };3093	int ret;3094 3095	if (!capable(CAP_SYS_ADMIN))3096		return -EPERM;3097 3098	if (f2fs_readonly(sbi->sb))3099		return -EROFS;3100 3101	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))3102		return -EINVAL;3103 3104	if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,3105							sizeof(range)))3106		return -EFAULT;3107 3108	if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||3109			__is_large_section(sbi)) {3110		f2fs_warn(sbi, "Can't flush %u in %d for SEGS_PER_SEC %u != 1",3111			  range.dev_num, sbi->s_ndevs, SEGS_PER_SEC(sbi));3112		return -EINVAL;3113	}3114 3115	ret = mnt_want_write_file(filp);3116	if (ret)3117		return ret;3118 3119	if (range.dev_num != 0)3120		dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);3121	dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);3122 3123	start_segno = sm->last_victim[FLUSH_DEVICE];3124	if (start_segno < dev_start_segno || start_segno >= dev_end_segno)3125		start_segno = dev_start_segno;3126	end_segno = min(start_segno + range.segments, dev_end_segno);3127 3128	while (start_segno < end_segno) {3129		if (!f2fs_down_write_trylock(&sbi->gc_lock)) {3130			ret = -EBUSY;3131			goto out;3132		}3133		sm->last_victim[GC_CB] = end_segno + 1;3134		sm->last_victim[GC_GREEDY] = end_segno + 1;3135		sm->last_victim[ALLOC_NEXT] = end_segno + 1;3136 3137		gc_control.victim_segno = start_segno;3138		stat_inc_gc_call_count(sbi, FOREGROUND);3139		ret = f2fs_gc(sbi, &gc_control);3140		if (ret == -EAGAIN)3141			ret = 0;3142		else if (ret < 0)3143			break;3144		start_segno++;3145	}3146out:3147	mnt_drop_write_file(filp);3148	return ret;3149}3150 3151static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)3152{3153	struct inode *inode = file_inode(filp);3154	u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);3155 3156	/* Must validate to set it with SQLite behavior in Android. */3157	sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;3158 3159	return put_user(sb_feature, (u32 __user *)arg);3160}3161 3162#ifdef CONFIG_QUOTA3163int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)3164{3165	struct dquot *transfer_to[MAXQUOTAS] = {};3166	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3167	struct super_block *sb = sbi->sb;3168	int err;3169 3170	transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));3171	if (IS_ERR(transfer_to[PRJQUOTA]))3172		return PTR_ERR(transfer_to[PRJQUOTA]);3173 3174	err = __dquot_transfer(inode, transfer_to);3175	if (err)3176		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);3177	dqput(transfer_to[PRJQUOTA]);3178	return err;3179}3180 3181static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)3182{3183	struct f2fs_inode_info *fi = F2FS_I(inode);3184	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3185	struct f2fs_inode *ri = NULL;3186	kprojid_t kprojid;3187	int err;3188 3189	if (!f2fs_sb_has_project_quota(sbi)) {3190		if (projid != F2FS_DEF_PROJID)3191			return -EOPNOTSUPP;3192		else3193			return 0;3194	}3195 3196	if (!f2fs_has_extra_attr(inode))3197		return -EOPNOTSUPP;3198 3199	kprojid = make_kprojid(&init_user_ns, (projid_t)projid);3200 3201	if (projid_eq(kprojid, fi->i_projid))3202		return 0;3203 3204	err = -EPERM;3205	/* Is it quota file? Do not allow user to mess with it */3206	if (IS_NOQUOTA(inode))3207		return err;3208 3209	if (!F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))3210		return -EOVERFLOW;3211 3212	err = f2fs_dquot_initialize(inode);3213	if (err)3214		return err;3215 3216	f2fs_lock_op(sbi);3217	err = f2fs_transfer_project_quota(inode, kprojid);3218	if (err)3219		goto out_unlock;3220 3221	fi->i_projid = kprojid;3222	inode_set_ctime_current(inode);3223	f2fs_mark_inode_dirty_sync(inode, true);3224out_unlock:3225	f2fs_unlock_op(sbi);3226	return err;3227}3228#else3229int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)3230{3231	return 0;3232}3233 3234static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)3235{3236	if (projid != F2FS_DEF_PROJID)3237		return -EOPNOTSUPP;3238	return 0;3239}3240#endif3241 3242int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa)3243{3244	struct inode *inode = d_inode(dentry);3245	struct f2fs_inode_info *fi = F2FS_I(inode);3246	u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);3247 3248	if (IS_ENCRYPTED(inode))3249		fsflags |= FS_ENCRYPT_FL;3250	if (IS_VERITY(inode))3251		fsflags |= FS_VERITY_FL;3252	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))3253		fsflags |= FS_INLINE_DATA_FL;3254	if (is_inode_flag_set(inode, FI_PIN_FILE))3255		fsflags |= FS_NOCOW_FL;3256 3257	fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL);3258 3259	if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))3260		fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);3261 3262	return 0;3263}3264 3265int f2fs_fileattr_set(struct mnt_idmap *idmap,3266		      struct dentry *dentry, struct fileattr *fa)3267{3268	struct inode *inode = d_inode(dentry);3269	u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL;3270	u32 iflags;3271	int err;3272 3273	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))3274		return -EIO;3275	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))3276		return -ENOSPC;3277	if (fsflags & ~F2FS_GETTABLE_FS_FL)3278		return -EOPNOTSUPP;3279	fsflags &= F2FS_SETTABLE_FS_FL;3280	if (!fa->flags_valid)3281		mask &= FS_COMMON_FL;3282 3283	iflags = f2fs_fsflags_to_iflags(fsflags);3284	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)3285		return -EOPNOTSUPP;3286 3287	err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask));3288	if (!err)3289		err = f2fs_ioc_setproject(inode, fa->fsx_projid);3290 3291	return err;3292}3293 3294int f2fs_pin_file_control(struct inode *inode, bool inc)3295{3296	struct f2fs_inode_info *fi = F2FS_I(inode);3297	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3298 3299	if (fi->i_gc_failures >= sbi->gc_pin_file_threshold) {3300		f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",3301			  __func__, inode->i_ino, fi->i_gc_failures);3302		clear_inode_flag(inode, FI_PIN_FILE);3303		return -EAGAIN;3304	}3305 3306	/* Use i_gc_failures for normal file as a risk signal. */3307	if (inc)3308		f2fs_i_gc_failures_write(inode, fi->i_gc_failures + 1);3309 3310	return 0;3311}3312 3313static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)3314{3315	struct inode *inode = file_inode(filp);3316	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3317	__u32 pin;3318	int ret = 0;3319 3320	if (get_user(pin, (__u32 __user *)arg))3321		return -EFAULT;3322 3323	if (!S_ISREG(inode->i_mode))3324		return -EINVAL;3325 3326	if (f2fs_readonly(sbi->sb))3327		return -EROFS;3328 3329	ret = mnt_want_write_file(filp);3330	if (ret)3331		return ret;3332 3333	inode_lock(inode);3334 3335	if (f2fs_is_atomic_file(inode)) {3336		ret = -EINVAL;3337		goto out;3338	}3339 3340	if (!pin) {3341		clear_inode_flag(inode, FI_PIN_FILE);3342		f2fs_i_gc_failures_write(inode, 0);3343		goto done;3344	} else if (f2fs_is_pinned_file(inode)) {3345		goto done;3346	}3347 3348	if (F2FS_HAS_BLOCKS(inode)) {3349		ret = -EFBIG;3350		goto out;3351	}3352 3353	/* Let's allow file pinning on zoned device. */3354	if (!f2fs_sb_has_blkzoned(sbi) &&3355	    f2fs_should_update_outplace(inode, NULL)) {3356		ret = -EINVAL;3357		goto out;3358	}3359 3360	if (f2fs_pin_file_control(inode, false)) {3361		ret = -EAGAIN;3362		goto out;3363	}3364 3365	ret = f2fs_convert_inline_inode(inode);3366	if (ret)3367		goto out;3368 3369	if (!f2fs_disable_compressed_file(inode)) {3370		ret = -EOPNOTSUPP;3371		goto out;3372	}3373 3374	set_inode_flag(inode, FI_PIN_FILE);3375	ret = F2FS_I(inode)->i_gc_failures;3376done:3377	f2fs_update_time(sbi, REQ_TIME);3378out:3379	inode_unlock(inode);3380	mnt_drop_write_file(filp);3381	return ret;3382}3383 3384static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)3385{3386	struct inode *inode = file_inode(filp);3387	__u32 pin = 0;3388 3389	if (is_inode_flag_set(inode, FI_PIN_FILE))3390		pin = F2FS_I(inode)->i_gc_failures;3391	return put_user(pin, (u32 __user *)arg);3392}3393 3394int f2fs_precache_extents(struct inode *inode)3395{3396	struct f2fs_inode_info *fi = F2FS_I(inode);3397	struct f2fs_map_blocks map;3398	pgoff_t m_next_extent;3399	loff_t end;3400	int err;3401 3402	if (is_inode_flag_set(inode, FI_NO_EXTENT))3403		return -EOPNOTSUPP;3404 3405	map.m_lblk = 0;3406	map.m_pblk = 0;3407	map.m_next_pgofs = NULL;3408	map.m_next_extent = &m_next_extent;3409	map.m_seg_type = NO_CHECK_TYPE;3410	map.m_may_create = false;3411	end = F2FS_BLK_ALIGN(i_size_read(inode));3412 3413	while (map.m_lblk < end) {3414		map.m_len = end - map.m_lblk;3415 3416		f2fs_down_write(&fi->i_gc_rwsem[WRITE]);3417		err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);3418		f2fs_up_write(&fi->i_gc_rwsem[WRITE]);3419		if (err || !map.m_len)3420			return err;3421 3422		map.m_lblk = m_next_extent;3423	}3424 3425	return 0;3426}3427 3428static int f2fs_ioc_precache_extents(struct file *filp)3429{3430	return f2fs_precache_extents(file_inode(filp));3431}3432 3433static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)3434{3435	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));3436	__u64 block_count;3437 3438	if (!capable(CAP_SYS_ADMIN))3439		return -EPERM;3440 3441	if (f2fs_readonly(sbi->sb))3442		return -EROFS;3443 3444	if (copy_from_user(&block_count, (void __user *)arg,3445			   sizeof(block_count)))3446		return -EFAULT;3447 3448	return f2fs_resize_fs(filp, block_count);3449}3450 3451static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg)3452{3453	struct inode *inode = file_inode(filp);3454 3455	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);3456 3457	if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) {3458		f2fs_warn(F2FS_I_SB(inode),3459			  "Can't enable fs-verity on inode %lu: the verity feature is not enabled on this filesystem",3460			  inode->i_ino);3461		return -EOPNOTSUPP;3462	}3463 3464	return fsverity_ioctl_enable(filp, (const void __user *)arg);3465}3466 3467static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg)3468{3469	if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))3470		return -EOPNOTSUPP;3471 3472	return fsverity_ioctl_measure(filp, (void __user *)arg);3473}3474 3475static int f2fs_ioc_read_verity_metadata(struct file *filp, unsigned long arg)3476{3477	if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))3478		return -EOPNOTSUPP;3479 3480	return fsverity_ioctl_read_metadata(filp, (const void __user *)arg);3481}3482 3483static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg)3484{3485	struct inode *inode = file_inode(filp);3486	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3487	char *vbuf;3488	int count;3489	int err = 0;3490 3491	vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL);3492	if (!vbuf)3493		return -ENOMEM;3494 3495	f2fs_down_read(&sbi->sb_lock);3496	count = utf16s_to_utf8s(sbi->raw_super->volume_name,3497			ARRAY_SIZE(sbi->raw_super->volume_name),3498			UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME);3499	f2fs_up_read(&sbi->sb_lock);3500 3501	if (copy_to_user((char __user *)arg, vbuf,3502				min(FSLABEL_MAX, count)))3503		err = -EFAULT;3504 3505	kfree(vbuf);3506	return err;3507}3508 3509static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg)3510{3511	struct inode *inode = file_inode(filp);3512	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3513	char *vbuf;3514	int err = 0;3515 3516	if (!capable(CAP_SYS_ADMIN))3517		return -EPERM;3518 3519	vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX);3520	if (IS_ERR(vbuf))3521		return PTR_ERR(vbuf);3522 3523	err = mnt_want_write_file(filp);3524	if (err)3525		goto out;3526 3527	f2fs_down_write(&sbi->sb_lock);3528 3529	memset(sbi->raw_super->volume_name, 0,3530			sizeof(sbi->raw_super->volume_name));3531	utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN,3532			sbi->raw_super->volume_name,3533			ARRAY_SIZE(sbi->raw_super->volume_name));3534 3535	err = f2fs_commit_super(sbi, false);3536 3537	f2fs_up_write(&sbi->sb_lock);3538 3539	mnt_drop_write_file(filp);3540out:3541	kfree(vbuf);3542	return err;3543}3544 3545static int f2fs_get_compress_blocks(struct inode *inode, __u64 *blocks)3546{3547	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))3548		return -EOPNOTSUPP;3549 3550	if (!f2fs_compressed_file(inode))3551		return -EINVAL;3552 3553	*blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);3554 3555	return 0;3556}3557 3558static int f2fs_ioc_get_compress_blocks(struct file *filp, unsigned long arg)3559{3560	struct inode *inode = file_inode(filp);3561	__u64 blocks;3562	int ret;3563 3564	ret = f2fs_get_compress_blocks(inode, &blocks);3565	if (ret < 0)3566		return ret;3567 3568	return put_user(blocks, (u64 __user *)arg);3569}3570 3571static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)3572{3573	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);3574	unsigned int released_blocks = 0;3575	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;3576	block_t blkaddr;3577	int i;3578 3579	for (i = 0; i < count; i++) {3580		blkaddr = data_blkaddr(dn->inode, dn->node_page,3581						dn->ofs_in_node + i);3582 3583		if (!__is_valid_data_blkaddr(blkaddr))3584			continue;3585		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,3586					DATA_GENERIC_ENHANCE)))3587			return -EFSCORRUPTED;3588	}3589 3590	while (count) {3591		int compr_blocks = 0;3592 3593		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {3594			blkaddr = f2fs_data_blkaddr(dn);3595 3596			if (i == 0) {3597				if (blkaddr == COMPRESS_ADDR)3598					continue;3599				dn->ofs_in_node += cluster_size;3600				goto next;3601			}3602 3603			if (__is_valid_data_blkaddr(blkaddr))3604				compr_blocks++;3605 3606			if (blkaddr != NEW_ADDR)3607				continue;3608 3609			f2fs_set_data_blkaddr(dn, NULL_ADDR);3610		}3611 3612		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false);3613		dec_valid_block_count(sbi, dn->inode,3614					cluster_size - compr_blocks);3615 3616		released_blocks += cluster_size - compr_blocks;3617next:3618		count -= cluster_size;3619	}3620 3621	return released_blocks;3622}3623 3624static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)3625{3626	struct inode *inode = file_inode(filp);3627	struct f2fs_inode_info *fi = F2FS_I(inode);3628	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3629	pgoff_t page_idx = 0, last_idx;3630	unsigned int released_blocks = 0;3631	int ret;3632	int writecount;3633 3634	if (!f2fs_sb_has_compression(sbi))3635		return -EOPNOTSUPP;3636 3637	if (f2fs_readonly(sbi->sb))3638		return -EROFS;3639 3640	ret = mnt_want_write_file(filp);3641	if (ret)3642		return ret;3643 3644	f2fs_balance_fs(sbi, true);3645 3646	inode_lock(inode);3647 3648	writecount = atomic_read(&inode->i_writecount);3649	if ((filp->f_mode & FMODE_WRITE && writecount != 1) ||3650			(!(filp->f_mode & FMODE_WRITE) && writecount)) {3651		ret = -EBUSY;3652		goto out;3653	}3654 3655	if (!f2fs_compressed_file(inode) ||3656		is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {3657		ret = -EINVAL;3658		goto out;3659	}3660 3661	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);3662	if (ret)3663		goto out;3664 3665	if (!atomic_read(&fi->i_compr_blocks)) {3666		ret = -EPERM;3667		goto out;3668	}3669 3670	set_inode_flag(inode, FI_COMPRESS_RELEASED);3671	inode_set_ctime_current(inode);3672	f2fs_mark_inode_dirty_sync(inode, true);3673 3674	f2fs_down_write(&fi->i_gc_rwsem[WRITE]);3675	filemap_invalidate_lock(inode->i_mapping);3676 3677	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);3678 3679	while (page_idx < last_idx) {3680		struct dnode_of_data dn;3681		pgoff_t end_offset, count;3682 3683		f2fs_lock_op(sbi);3684 3685		set_new_dnode(&dn, inode, NULL, NULL, 0);3686		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);3687		if (ret) {3688			f2fs_unlock_op(sbi);3689			if (ret == -ENOENT) {3690				page_idx = f2fs_get_next_page_offset(&dn,3691								page_idx);3692				ret = 0;3693				continue;3694			}3695			break;3696		}3697 3698		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);3699		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);3700		count = round_up(count, fi->i_cluster_size);3701 3702		ret = release_compress_blocks(&dn, count);3703 3704		f2fs_put_dnode(&dn);3705 3706		f2fs_unlock_op(sbi);3707 3708		if (ret < 0)3709			break;3710 3711		page_idx += count;3712		released_blocks += ret;3713	}3714 3715	filemap_invalidate_unlock(inode->i_mapping);3716	f2fs_up_write(&fi->i_gc_rwsem[WRITE]);3717out:3718	if (released_blocks)3719		f2fs_update_time(sbi, REQ_TIME);3720	inode_unlock(inode);3721 3722	mnt_drop_write_file(filp);3723 3724	if (ret >= 0) {3725		ret = put_user(released_blocks, (u64 __user *)arg);3726	} else if (released_blocks &&3727			atomic_read(&fi->i_compr_blocks)) {3728		set_sbi_flag(sbi, SBI_NEED_FSCK);3729		f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "3730			"iblocks=%llu, released=%u, compr_blocks=%u, "3731			"run fsck to fix.",3732			__func__, inode->i_ino, inode->i_blocks,3733			released_blocks,3734			atomic_read(&fi->i_compr_blocks));3735	}3736 3737	return ret;3738}3739 3740static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count,3741		unsigned int *reserved_blocks)3742{3743	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);3744	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;3745	block_t blkaddr;3746	int i;3747 3748	for (i = 0; i < count; i++) {3749		blkaddr = data_blkaddr(dn->inode, dn->node_page,3750						dn->ofs_in_node + i);3751 3752		if (!__is_valid_data_blkaddr(blkaddr))3753			continue;3754		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,3755					DATA_GENERIC_ENHANCE)))3756			return -EFSCORRUPTED;3757	}3758 3759	while (count) {3760		int compr_blocks = 0;3761		blkcnt_t reserved = 0;3762		blkcnt_t to_reserved;3763		int ret;3764 3765		for (i = 0; i < cluster_size; i++) {3766			blkaddr = data_blkaddr(dn->inode, dn->node_page,3767						dn->ofs_in_node + i);3768 3769			if (i == 0) {3770				if (blkaddr != COMPRESS_ADDR) {3771					dn->ofs_in_node += cluster_size;3772					goto next;3773				}3774				continue;3775			}3776 3777			/*3778			 * compressed cluster was not released due to it3779			 * fails in release_compress_blocks(), so NEW_ADDR3780			 * is a possible case.3781			 */3782			if (blkaddr == NEW_ADDR) {3783				reserved++;3784				continue;3785			}3786			if (__is_valid_data_blkaddr(blkaddr)) {3787				compr_blocks++;3788				continue;3789			}3790		}3791 3792		to_reserved = cluster_size - compr_blocks - reserved;3793 3794		/* for the case all blocks in cluster were reserved */3795		if (to_reserved == 1) {3796			dn->ofs_in_node += cluster_size;3797			goto next;3798		}3799 3800		ret = inc_valid_block_count(sbi, dn->inode,3801						&to_reserved, false);3802		if (unlikely(ret))3803			return ret;3804 3805		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {3806			if (f2fs_data_blkaddr(dn) == NULL_ADDR)3807				f2fs_set_data_blkaddr(dn, NEW_ADDR);3808		}3809 3810		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);3811 3812		*reserved_blocks += to_reserved;3813next:3814		count -= cluster_size;3815	}3816 3817	return 0;3818}3819 3820static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)3821{3822	struct inode *inode = file_inode(filp);3823	struct f2fs_inode_info *fi = F2FS_I(inode);3824	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3825	pgoff_t page_idx = 0, last_idx;3826	unsigned int reserved_blocks = 0;3827	int ret;3828 3829	if (!f2fs_sb_has_compression(sbi))3830		return -EOPNOTSUPP;3831 3832	if (f2fs_readonly(sbi->sb))3833		return -EROFS;3834 3835	ret = mnt_want_write_file(filp);3836	if (ret)3837		return ret;3838 3839	f2fs_balance_fs(sbi, true);3840 3841	inode_lock(inode);3842 3843	if (!f2fs_compressed_file(inode) ||3844		!is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {3845		ret = -EINVAL;3846		goto unlock_inode;3847	}3848 3849	if (atomic_read(&fi->i_compr_blocks))3850		goto unlock_inode;3851 3852	f2fs_down_write(&fi->i_gc_rwsem[WRITE]);3853	filemap_invalidate_lock(inode->i_mapping);3854 3855	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);3856 3857	while (page_idx < last_idx) {3858		struct dnode_of_data dn;3859		pgoff_t end_offset, count;3860 3861		f2fs_lock_op(sbi);3862 3863		set_new_dnode(&dn, inode, NULL, NULL, 0);3864		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);3865		if (ret) {3866			f2fs_unlock_op(sbi);3867			if (ret == -ENOENT) {3868				page_idx = f2fs_get_next_page_offset(&dn,3869								page_idx);3870				ret = 0;3871				continue;3872			}3873			break;3874		}3875 3876		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);3877		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);3878		count = round_up(count, fi->i_cluster_size);3879 3880		ret = reserve_compress_blocks(&dn, count, &reserved_blocks);3881 3882		f2fs_put_dnode(&dn);3883 3884		f2fs_unlock_op(sbi);3885 3886		if (ret < 0)3887			break;3888 3889		page_idx += count;3890	}3891 3892	filemap_invalidate_unlock(inode->i_mapping);3893	f2fs_up_write(&fi->i_gc_rwsem[WRITE]);3894 3895	if (!ret) {3896		clear_inode_flag(inode, FI_COMPRESS_RELEASED);3897		inode_set_ctime_current(inode);3898		f2fs_mark_inode_dirty_sync(inode, true);3899	}3900unlock_inode:3901	if (reserved_blocks)3902		f2fs_update_time(sbi, REQ_TIME);3903	inode_unlock(inode);3904	mnt_drop_write_file(filp);3905 3906	if (!ret) {3907		ret = put_user(reserved_blocks, (u64 __user *)arg);3908	} else if (reserved_blocks &&3909			atomic_read(&fi->i_compr_blocks)) {3910		set_sbi_flag(sbi, SBI_NEED_FSCK);3911		f2fs_warn(sbi, "%s: partial blocks were reserved i_ino=%lx "3912			"iblocks=%llu, reserved=%u, compr_blocks=%u, "3913			"run fsck to fix.",3914			__func__, inode->i_ino, inode->i_blocks,3915			reserved_blocks,3916			atomic_read(&fi->i_compr_blocks));3917	}3918 3919	return ret;3920}3921 3922static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode,3923		pgoff_t off, block_t block, block_t len, u32 flags)3924{3925	sector_t sector = SECTOR_FROM_BLOCK(block);3926	sector_t nr_sects = SECTOR_FROM_BLOCK(len);3927	int ret = 0;3928 3929	if (flags & F2FS_TRIM_FILE_DISCARD) {3930		if (bdev_max_secure_erase_sectors(bdev))3931			ret = blkdev_issue_secure_erase(bdev, sector, nr_sects,3932					GFP_NOFS);3933		else3934			ret = blkdev_issue_discard(bdev, sector, nr_sects,3935					GFP_NOFS);3936	}3937 3938	if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) {3939		if (IS_ENCRYPTED(inode))3940			ret = fscrypt_zeroout_range(inode, off, block, len);3941		else3942			ret = blkdev_issue_zeroout(bdev, sector, nr_sects,3943					GFP_NOFS, 0);3944	}3945 3946	return ret;3947}3948 3949static int f2fs_sec_trim_file(struct file *filp, unsigned long arg)3950{3951	struct inode *inode = file_inode(filp);3952	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);3953	struct address_space *mapping = inode->i_mapping;3954	struct block_device *prev_bdev = NULL;3955	struct f2fs_sectrim_range range;3956	pgoff_t index, pg_end, prev_index = 0;3957	block_t prev_block = 0, len = 0;3958	loff_t end_addr;3959	bool to_end = false;3960	int ret = 0;3961 3962	if (!(filp->f_mode & FMODE_WRITE))3963		return -EBADF;3964 3965	if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg,3966				sizeof(range)))3967		return -EFAULT;3968 3969	if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) ||3970			!S_ISREG(inode->i_mode))3971		return -EINVAL;3972 3973	if (((range.flags & F2FS_TRIM_FILE_DISCARD) &&3974			!f2fs_hw_support_discard(sbi)) ||3975			((range.flags & F2FS_TRIM_FILE_ZEROOUT) &&3976			 IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi)))3977		return -EOPNOTSUPP;3978 3979	ret = mnt_want_write_file(filp);3980	if (ret)3981		return ret;3982	inode_lock(inode);3983 3984	if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) ||3985			range.start >= inode->i_size) {3986		ret = -EINVAL;3987		goto err;3988	}3989 3990	if (range.len == 0)3991		goto err;3992 3993	if (inode->i_size - range.start > range.len) {3994		end_addr = range.start + range.len;3995	} else {3996		end_addr = range.len == (u64)-1 ?3997			sbi->sb->s_maxbytes : inode->i_size;3998		to_end = true;3999	}4000 4001	if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) ||4002			(!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) {4003		ret = -EINVAL;4004		goto err;4005	}4006 4007	index = F2FS_BYTES_TO_BLK(range.start);4008	pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE);4009 4010	ret = f2fs_convert_inline_inode(inode);4011	if (ret)4012		goto err;4013 4014	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);4015	filemap_invalidate_lock(mapping);4016 4017	ret = filemap_write_and_wait_range(mapping, range.start,4018			to_end ? LLONG_MAX : end_addr - 1);4019	if (ret)4020		goto out;4021 4022	truncate_inode_pages_range(mapping, range.start,4023			to_end ? -1 : end_addr - 1);4024 4025	while (index < pg_end) {4026		struct dnode_of_data dn;4027		pgoff_t end_offset, count;4028		int i;4029 4030		set_new_dnode(&dn, inode, NULL, NULL, 0);4031		ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);4032		if (ret) {4033			if (ret == -ENOENT) {4034				index = f2fs_get_next_page_offset(&dn, index);4035				continue;4036			}4037			goto out;4038		}4039 4040		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);4041		count = min(end_offset - dn.ofs_in_node, pg_end - index);4042		for (i = 0; i < count; i++, index++, dn.ofs_in_node++) {4043			struct block_device *cur_bdev;4044			block_t blkaddr = f2fs_data_blkaddr(&dn);4045 4046			if (!__is_valid_data_blkaddr(blkaddr))4047				continue;4048 4049			if (!f2fs_is_valid_blkaddr(sbi, blkaddr,4050						DATA_GENERIC_ENHANCE)) {4051				ret = -EFSCORRUPTED;4052				f2fs_put_dnode(&dn);4053				goto out;4054			}4055 4056			cur_bdev = f2fs_target_device(sbi, blkaddr, NULL);4057			if (f2fs_is_multi_device(sbi)) {4058				int di = f2fs_target_device_index(sbi, blkaddr);4059 4060				blkaddr -= FDEV(di).start_blk;4061			}4062 4063			if (len) {4064				if (prev_bdev == cur_bdev &&4065						index == prev_index + len &&4066						blkaddr == prev_block + len) {4067					len++;4068				} else {4069					ret = f2fs_secure_erase(prev_bdev,4070						inode, prev_index, prev_block,4071						len, range.flags);4072					if (ret) {4073						f2fs_put_dnode(&dn);4074						goto out;4075					}4076 4077					len = 0;4078				}4079			}4080 4081			if (!len) {4082				prev_bdev = cur_bdev;4083				prev_index = index;4084				prev_block = blkaddr;4085				len = 1;4086			}4087		}4088 4089		f2fs_put_dnode(&dn);4090 4091		if (fatal_signal_pending(current)) {4092			ret = -EINTR;4093			goto out;4094		}4095		cond_resched();4096	}4097 4098	if (len)4099		ret = f2fs_secure_erase(prev_bdev, inode, prev_index,4100				prev_block, len, range.flags);4101	f2fs_update_time(sbi, REQ_TIME);4102out:4103	filemap_invalidate_unlock(mapping);4104	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);4105err:4106	inode_unlock(inode);4107	mnt_drop_write_file(filp);4108 4109	return ret;4110}4111 4112static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)4113{4114	struct inode *inode = file_inode(filp);4115	struct f2fs_comp_option option;4116 4117	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))4118		return -EOPNOTSUPP;4119 4120	inode_lock_shared(inode);4121 4122	if (!f2fs_compressed_file(inode)) {4123		inode_unlock_shared(inode);4124		return -ENODATA;4125	}4126 4127	option.algorithm = F2FS_I(inode)->i_compress_algorithm;4128	option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size;4129 4130	inode_unlock_shared(inode);4131 4132	if (copy_to_user((struct f2fs_comp_option __user *)arg, &option,4133				sizeof(option)))4134		return -EFAULT;4135 4136	return 0;4137}4138 4139static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)4140{4141	struct inode *inode = file_inode(filp);4142	struct f2fs_inode_info *fi = F2FS_I(inode);4143	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4144	struct f2fs_comp_option option;4145	int ret = 0;4146 4147	if (!f2fs_sb_has_compression(sbi))4148		return -EOPNOTSUPP;4149 4150	if (!(filp->f_mode & FMODE_WRITE))4151		return -EBADF;4152 4153	if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg,4154				sizeof(option)))4155		return -EFAULT;4156 4157	if (option.log_cluster_size < MIN_COMPRESS_LOG_SIZE ||4158		option.log_cluster_size > MAX_COMPRESS_LOG_SIZE ||4159		option.algorithm >= COMPRESS_MAX)4160		return -EINVAL;4161 4162	ret = mnt_want_write_file(filp);4163	if (ret)4164		return ret;4165	inode_lock(inode);4166 4167	f2fs_down_write(&F2FS_I(inode)->i_sem);4168	if (!f2fs_compressed_file(inode)) {4169		ret = -EINVAL;4170		goto out;4171	}4172 4173	if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) {4174		ret = -EBUSY;4175		goto out;4176	}4177 4178	if (F2FS_HAS_BLOCKS(inode)) {4179		ret = -EFBIG;4180		goto out;4181	}4182 4183	fi->i_compress_algorithm = option.algorithm;4184	fi->i_log_cluster_size = option.log_cluster_size;4185	fi->i_cluster_size = BIT(option.log_cluster_size);4186	/* Set default level */4187	if (fi->i_compress_algorithm == COMPRESS_ZSTD)4188		fi->i_compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;4189	else4190		fi->i_compress_level = 0;4191	/* Adjust mount option level */4192	if (option.algorithm == F2FS_OPTION(sbi).compress_algorithm &&4193	    F2FS_OPTION(sbi).compress_level)4194		fi->i_compress_level = F2FS_OPTION(sbi).compress_level;4195	f2fs_mark_inode_dirty_sync(inode, true);4196 4197	if (!f2fs_is_compress_backend_ready(inode))4198		f2fs_warn(sbi, "compression algorithm is successfully set, "4199			"but current kernel doesn't support this algorithm.");4200out:4201	f2fs_up_write(&fi->i_sem);4202	inode_unlock(inode);4203	mnt_drop_write_file(filp);4204 4205	return ret;4206}4207 4208static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len)4209{4210	DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx);4211	struct address_space *mapping = inode->i_mapping;4212	struct page *page;4213	pgoff_t redirty_idx = page_idx;4214	int i, page_len = 0, ret = 0;4215 4216	page_cache_ra_unbounded(&ractl, len, 0);4217 4218	for (i = 0; i < len; i++, page_idx++) {4219		page = read_cache_page(mapping, page_idx, NULL, NULL);4220		if (IS_ERR(page)) {4221			ret = PTR_ERR(page);4222			break;4223		}4224		page_len++;4225	}4226 4227	for (i = 0; i < page_len; i++, redirty_idx++) {4228		page = find_lock_page(mapping, redirty_idx);4229 4230		/* It will never fail, when page has pinned above */4231		f2fs_bug_on(F2FS_I_SB(inode), !page);4232 4233		f2fs_wait_on_page_writeback(page, DATA, true, true);4234 4235		set_page_dirty(page);4236		set_page_private_gcing(page);4237		f2fs_put_page(page, 1);4238		f2fs_put_page(page, 0);4239	}4240 4241	return ret;4242}4243 4244static int f2fs_ioc_decompress_file(struct file *filp)4245{4246	struct inode *inode = file_inode(filp);4247	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4248	struct f2fs_inode_info *fi = F2FS_I(inode);4249	pgoff_t page_idx = 0, last_idx, cluster_idx;4250	int ret;4251 4252	if (!f2fs_sb_has_compression(sbi) ||4253			F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)4254		return -EOPNOTSUPP;4255 4256	if (!(filp->f_mode & FMODE_WRITE))4257		return -EBADF;4258 4259	f2fs_balance_fs(sbi, true);4260 4261	ret = mnt_want_write_file(filp);4262	if (ret)4263		return ret;4264	inode_lock(inode);4265 4266	if (!f2fs_is_compress_backend_ready(inode)) {4267		ret = -EOPNOTSUPP;4268		goto out;4269	}4270 4271	if (!f2fs_compressed_file(inode) ||4272		is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {4273		ret = -EINVAL;4274		goto out;4275	}4276 4277	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);4278	if (ret)4279		goto out;4280 4281	if (!atomic_read(&fi->i_compr_blocks))4282		goto out;4283 4284	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);4285	last_idx >>= fi->i_log_cluster_size;4286 4287	for (cluster_idx = 0; cluster_idx < last_idx; cluster_idx++) {4288		page_idx = cluster_idx << fi->i_log_cluster_size;4289 4290		if (!f2fs_is_compressed_cluster(inode, page_idx))4291			continue;4292 4293		ret = redirty_blocks(inode, page_idx, fi->i_cluster_size);4294		if (ret < 0)4295			break;4296 4297		if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) {4298			ret = filemap_fdatawrite(inode->i_mapping);4299			if (ret < 0)4300				break;4301		}4302 4303		cond_resched();4304		if (fatal_signal_pending(current)) {4305			ret = -EINTR;4306			break;4307		}4308	}4309 4310	if (!ret)4311		ret = filemap_write_and_wait_range(inode->i_mapping, 0,4312							LLONG_MAX);4313 4314	if (ret)4315		f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.",4316			  __func__, ret);4317	f2fs_update_time(sbi, REQ_TIME);4318out:4319	inode_unlock(inode);4320	mnt_drop_write_file(filp);4321 4322	return ret;4323}4324 4325static int f2fs_ioc_compress_file(struct file *filp)4326{4327	struct inode *inode = file_inode(filp);4328	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4329	struct f2fs_inode_info *fi = F2FS_I(inode);4330	pgoff_t page_idx = 0, last_idx, cluster_idx;4331	int ret;4332 4333	if (!f2fs_sb_has_compression(sbi) ||4334			F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)4335		return -EOPNOTSUPP;4336 4337	if (!(filp->f_mode & FMODE_WRITE))4338		return -EBADF;4339 4340	f2fs_balance_fs(sbi, true);4341 4342	ret = mnt_want_write_file(filp);4343	if (ret)4344		return ret;4345	inode_lock(inode);4346 4347	if (!f2fs_is_compress_backend_ready(inode)) {4348		ret = -EOPNOTSUPP;4349		goto out;4350	}4351 4352	if (!f2fs_compressed_file(inode) ||4353		is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {4354		ret = -EINVAL;4355		goto out;4356	}4357 4358	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);4359	if (ret)4360		goto out;4361 4362	set_inode_flag(inode, FI_ENABLE_COMPRESS);4363 4364	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);4365	last_idx >>= fi->i_log_cluster_size;4366 4367	for (cluster_idx = 0; cluster_idx < last_idx; cluster_idx++) {4368		page_idx = cluster_idx << fi->i_log_cluster_size;4369 4370		if (f2fs_is_sparse_cluster(inode, page_idx))4371			continue;4372 4373		ret = redirty_blocks(inode, page_idx, fi->i_cluster_size);4374		if (ret < 0)4375			break;4376 4377		if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) {4378			ret = filemap_fdatawrite(inode->i_mapping);4379			if (ret < 0)4380				break;4381		}4382 4383		cond_resched();4384		if (fatal_signal_pending(current)) {4385			ret = -EINTR;4386			break;4387		}4388	}4389 4390	if (!ret)4391		ret = filemap_write_and_wait_range(inode->i_mapping, 0,4392							LLONG_MAX);4393 4394	clear_inode_flag(inode, FI_ENABLE_COMPRESS);4395 4396	if (ret)4397		f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.",4398			  __func__, ret);4399	f2fs_update_time(sbi, REQ_TIME);4400out:4401	inode_unlock(inode);4402	mnt_drop_write_file(filp);4403 4404	return ret;4405}4406 4407static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)4408{4409	switch (cmd) {4410	case FS_IOC_GETVERSION:4411		return f2fs_ioc_getversion(filp, arg);4412	case F2FS_IOC_START_ATOMIC_WRITE:4413		return f2fs_ioc_start_atomic_write(filp, false);4414	case F2FS_IOC_START_ATOMIC_REPLACE:4415		return f2fs_ioc_start_atomic_write(filp, true);4416	case F2FS_IOC_COMMIT_ATOMIC_WRITE:4417		return f2fs_ioc_commit_atomic_write(filp);4418	case F2FS_IOC_ABORT_ATOMIC_WRITE:4419		return f2fs_ioc_abort_atomic_write(filp);4420	case F2FS_IOC_START_VOLATILE_WRITE:4421	case F2FS_IOC_RELEASE_VOLATILE_WRITE:4422		return -EOPNOTSUPP;4423	case F2FS_IOC_SHUTDOWN:4424		return f2fs_ioc_shutdown(filp, arg);4425	case FITRIM:4426		return f2fs_ioc_fitrim(filp, arg);4427	case FS_IOC_SET_ENCRYPTION_POLICY:4428		return f2fs_ioc_set_encryption_policy(filp, arg);4429	case FS_IOC_GET_ENCRYPTION_POLICY:4430		return f2fs_ioc_get_encryption_policy(filp, arg);4431	case FS_IOC_GET_ENCRYPTION_PWSALT:4432		return f2fs_ioc_get_encryption_pwsalt(filp, arg);4433	case FS_IOC_GET_ENCRYPTION_POLICY_EX:4434		return f2fs_ioc_get_encryption_policy_ex(filp, arg);4435	case FS_IOC_ADD_ENCRYPTION_KEY:4436		return f2fs_ioc_add_encryption_key(filp, arg);4437	case FS_IOC_REMOVE_ENCRYPTION_KEY:4438		return f2fs_ioc_remove_encryption_key(filp, arg);4439	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:4440		return f2fs_ioc_remove_encryption_key_all_users(filp, arg);4441	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:4442		return f2fs_ioc_get_encryption_key_status(filp, arg);4443	case FS_IOC_GET_ENCRYPTION_NONCE:4444		return f2fs_ioc_get_encryption_nonce(filp, arg);4445	case F2FS_IOC_GARBAGE_COLLECT:4446		return f2fs_ioc_gc(filp, arg);4447	case F2FS_IOC_GARBAGE_COLLECT_RANGE:4448		return f2fs_ioc_gc_range(filp, arg);4449	case F2FS_IOC_WRITE_CHECKPOINT:4450		return f2fs_ioc_write_checkpoint(filp);4451	case F2FS_IOC_DEFRAGMENT:4452		return f2fs_ioc_defragment(filp, arg);4453	case F2FS_IOC_MOVE_RANGE:4454		return f2fs_ioc_move_range(filp, arg);4455	case F2FS_IOC_FLUSH_DEVICE:4456		return f2fs_ioc_flush_device(filp, arg);4457	case F2FS_IOC_GET_FEATURES:4458		return f2fs_ioc_get_features(filp, arg);4459	case F2FS_IOC_GET_PIN_FILE:4460		return f2fs_ioc_get_pin_file(filp, arg);4461	case F2FS_IOC_SET_PIN_FILE:4462		return f2fs_ioc_set_pin_file(filp, arg);4463	case F2FS_IOC_PRECACHE_EXTENTS:4464		return f2fs_ioc_precache_extents(filp);4465	case F2FS_IOC_RESIZE_FS:4466		return f2fs_ioc_resize_fs(filp, arg);4467	case FS_IOC_ENABLE_VERITY:4468		return f2fs_ioc_enable_verity(filp, arg);4469	case FS_IOC_MEASURE_VERITY:4470		return f2fs_ioc_measure_verity(filp, arg);4471	case FS_IOC_READ_VERITY_METADATA:4472		return f2fs_ioc_read_verity_metadata(filp, arg);4473	case FS_IOC_GETFSLABEL:4474		return f2fs_ioc_getfslabel(filp, arg);4475	case FS_IOC_SETFSLABEL:4476		return f2fs_ioc_setfslabel(filp, arg);4477	case F2FS_IOC_GET_COMPRESS_BLOCKS:4478		return f2fs_ioc_get_compress_blocks(filp, arg);4479	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:4480		return f2fs_release_compress_blocks(filp, arg);4481	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:4482		return f2fs_reserve_compress_blocks(filp, arg);4483	case F2FS_IOC_SEC_TRIM_FILE:4484		return f2fs_sec_trim_file(filp, arg);4485	case F2FS_IOC_GET_COMPRESS_OPTION:4486		return f2fs_ioc_get_compress_option(filp, arg);4487	case F2FS_IOC_SET_COMPRESS_OPTION:4488		return f2fs_ioc_set_compress_option(filp, arg);4489	case F2FS_IOC_DECOMPRESS_FILE:4490		return f2fs_ioc_decompress_file(filp);4491	case F2FS_IOC_COMPRESS_FILE:4492		return f2fs_ioc_compress_file(filp);4493	default:4494		return -ENOTTY;4495	}4496}4497 4498long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)4499{4500	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))4501		return -EIO;4502	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp))))4503		return -ENOSPC;4504 4505	return __f2fs_ioctl(filp, cmd, arg);4506}4507 4508/*4509 * Return %true if the given read or write request should use direct I/O, or4510 * %false if it should use buffered I/O.4511 */4512static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb,4513				struct iov_iter *iter)4514{4515	unsigned int align;4516 4517	if (!(iocb->ki_flags & IOCB_DIRECT))4518		return false;4519 4520	if (f2fs_force_buffered_io(inode, iov_iter_rw(iter)))4521		return false;4522 4523	/*4524	 * Direct I/O not aligned to the disk's logical_block_size will be4525	 * attempted, but will fail with -EINVAL.4526	 *4527	 * f2fs additionally requires that direct I/O be aligned to the4528	 * filesystem block size, which is often a stricter requirement.4529	 * However, f2fs traditionally falls back to buffered I/O on requests4530	 * that are logical_block_size-aligned but not fs-block aligned.4531	 *4532	 * The below logic implements this behavior.4533	 */4534	align = iocb->ki_pos | iov_iter_alignment(iter);4535	if (!IS_ALIGNED(align, i_blocksize(inode)) &&4536	    IS_ALIGNED(align, bdev_logical_block_size(inode->i_sb->s_bdev)))4537		return false;4538 4539	return true;4540}4541 4542static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error,4543				unsigned int flags)4544{4545	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));4546 4547	dec_page_count(sbi, F2FS_DIO_READ);4548	if (error)4549		return error;4550	f2fs_update_iostat(sbi, NULL, APP_DIRECT_READ_IO, size);4551	return 0;4552}4553 4554static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = {4555	.end_io = f2fs_dio_read_end_io,4556};4557 4558static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)4559{4560	struct file *file = iocb->ki_filp;4561	struct inode *inode = file_inode(file);4562	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4563	struct f2fs_inode_info *fi = F2FS_I(inode);4564	const loff_t pos = iocb->ki_pos;4565	const size_t count = iov_iter_count(to);4566	struct iomap_dio *dio;4567	ssize_t ret;4568 4569	if (count == 0)4570		return 0; /* skip atime update */4571 4572	trace_f2fs_direct_IO_enter(inode, iocb, count, READ);4573 4574	if (iocb->ki_flags & IOCB_NOWAIT) {4575		if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {4576			ret = -EAGAIN;4577			goto out;4578		}4579	} else {4580		f2fs_down_read(&fi->i_gc_rwsem[READ]);4581	}4582 4583	/* dio is not compatible w/ atomic file */4584	if (f2fs_is_atomic_file(inode)) {4585		f2fs_up_read(&fi->i_gc_rwsem[READ]);4586		ret = -EOPNOTSUPP;4587		goto out;4588	}4589 4590	/*4591	 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of4592	 * the higher-level function iomap_dio_rw() in order to ensure that the4593	 * F2FS_DIO_READ counter will be decremented correctly in all cases.4594	 */4595	inc_page_count(sbi, F2FS_DIO_READ);4596	dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops,4597			     &f2fs_iomap_dio_read_ops, 0, NULL, 0);4598	if (IS_ERR_OR_NULL(dio)) {4599		ret = PTR_ERR_OR_ZERO(dio);4600		if (ret != -EIOCBQUEUED)4601			dec_page_count(sbi, F2FS_DIO_READ);4602	} else {4603		ret = iomap_dio_complete(dio);4604	}4605 4606	f2fs_up_read(&fi->i_gc_rwsem[READ]);4607 4608	file_accessed(file);4609out:4610	trace_f2fs_direct_IO_exit(inode, pos, count, READ, ret);4611	return ret;4612}4613 4614static void f2fs_trace_rw_file_path(struct file *file, loff_t pos, size_t count,4615				    int rw)4616{4617	struct inode *inode = file_inode(file);4618	char *buf, *path;4619 4620	buf = f2fs_getname(F2FS_I_SB(inode));4621	if (!buf)4622		return;4623	path = dentry_path_raw(file_dentry(file), buf, PATH_MAX);4624	if (IS_ERR(path))4625		goto free_buf;4626	if (rw == WRITE)4627		trace_f2fs_datawrite_start(inode, pos, count,4628				current->pid, path, current->comm);4629	else4630		trace_f2fs_dataread_start(inode, pos, count,4631				current->pid, path, current->comm);4632free_buf:4633	f2fs_putname(buf);4634}4635 4636static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)4637{4638	struct inode *inode = file_inode(iocb->ki_filp);4639	const loff_t pos = iocb->ki_pos;4640	ssize_t ret;4641 4642	if (!f2fs_is_compress_backend_ready(inode))4643		return -EOPNOTSUPP;4644 4645	if (trace_f2fs_dataread_start_enabled())4646		f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,4647					iov_iter_count(to), READ);4648 4649	/* In LFS mode, if there is inflight dio, wait for its completion */4650	if (f2fs_lfs_mode(F2FS_I_SB(inode)) &&4651	    get_pages(F2FS_I_SB(inode), F2FS_DIO_WRITE))4652		inode_dio_wait(inode);4653 4654	if (f2fs_should_use_dio(inode, iocb, to)) {4655		ret = f2fs_dio_read_iter(iocb, to);4656	} else {4657		ret = filemap_read(iocb, to, 0);4658		if (ret > 0)4659			f2fs_update_iostat(F2FS_I_SB(inode), inode,4660						APP_BUFFERED_READ_IO, ret);4661	}4662	if (trace_f2fs_dataread_end_enabled())4663		trace_f2fs_dataread_end(inode, pos, ret);4664	return ret;4665}4666 4667static ssize_t f2fs_file_splice_read(struct file *in, loff_t *ppos,4668				     struct pipe_inode_info *pipe,4669				     size_t len, unsigned int flags)4670{4671	struct inode *inode = file_inode(in);4672	const loff_t pos = *ppos;4673	ssize_t ret;4674 4675	if (!f2fs_is_compress_backend_ready(inode))4676		return -EOPNOTSUPP;4677 4678	if (trace_f2fs_dataread_start_enabled())4679		f2fs_trace_rw_file_path(in, pos, len, READ);4680 4681	ret = filemap_splice_read(in, ppos, pipe, len, flags);4682	if (ret > 0)4683		f2fs_update_iostat(F2FS_I_SB(inode), inode,4684				   APP_BUFFERED_READ_IO, ret);4685 4686	if (trace_f2fs_dataread_end_enabled())4687		trace_f2fs_dataread_end(inode, pos, ret);4688	return ret;4689}4690 4691static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from)4692{4693	struct file *file = iocb->ki_filp;4694	struct inode *inode = file_inode(file);4695	ssize_t count;4696	int err;4697 4698	if (IS_IMMUTABLE(inode))4699		return -EPERM;4700 4701	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED))4702		return -EPERM;4703 4704	count = generic_write_checks(iocb, from);4705	if (count <= 0)4706		return count;4707 4708	err = file_modified(file);4709	if (err)4710		return err;4711	return count;4712}4713 4714/*4715 * Preallocate blocks for a write request, if it is possible and helpful to do4716 * so.  Returns a positive number if blocks may have been preallocated, 0 if no4717 * blocks were preallocated, or a negative errno value if something went4718 * seriously wrong.  Also sets FI_PREALLOCATED_ALL on the inode if *all* the4719 * requested blocks (not just some of them) have been allocated.4720 */4721static int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *iter,4722				   bool dio)4723{4724	struct inode *inode = file_inode(iocb->ki_filp);4725	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4726	const loff_t pos = iocb->ki_pos;4727	const size_t count = iov_iter_count(iter);4728	struct f2fs_map_blocks map = {};4729	int flag;4730	int ret;4731 4732	/* If it will be an out-of-place direct write, don't bother. */4733	if (dio && f2fs_lfs_mode(sbi))4734		return 0;4735	/*4736	 * Don't preallocate holes aligned to DIO_SKIP_HOLES which turns into4737	 * buffered IO, if DIO meets any holes.4738	 */4739	if (dio && i_size_read(inode) &&4740		(F2FS_BYTES_TO_BLK(pos) < F2FS_BLK_ALIGN(i_size_read(inode))))4741		return 0;4742 4743	/* No-wait I/O can't allocate blocks. */4744	if (iocb->ki_flags & IOCB_NOWAIT)4745		return 0;4746 4747	/* If it will be a short write, don't bother. */4748	if (fault_in_iov_iter_readable(iter, count))4749		return 0;4750 4751	if (f2fs_has_inline_data(inode)) {4752		/* If the data will fit inline, don't bother. */4753		if (pos + count <= MAX_INLINE_DATA(inode))4754			return 0;4755		ret = f2fs_convert_inline_inode(inode);4756		if (ret)4757			return ret;4758	}4759 4760	/* Do not preallocate blocks that will be written partially in 4KB. */4761	map.m_lblk = F2FS_BLK_ALIGN(pos);4762	map.m_len = F2FS_BYTES_TO_BLK(pos + count);4763	if (map.m_len > map.m_lblk)4764		map.m_len -= map.m_lblk;4765	else4766		return 0;4767 4768	map.m_may_create = true;4769	if (dio) {4770		map.m_seg_type = f2fs_rw_hint_to_seg_type(sbi,4771						inode->i_write_hint);4772		flag = F2FS_GET_BLOCK_PRE_DIO;4773	} else {4774		map.m_seg_type = NO_CHECK_TYPE;4775		flag = F2FS_GET_BLOCK_PRE_AIO;4776	}4777 4778	ret = f2fs_map_blocks(inode, &map, flag);4779	/* -ENOSPC|-EDQUOT are fine to report the number of allocated blocks. */4780	if (ret < 0 && !((ret == -ENOSPC || ret == -EDQUOT) && map.m_len > 0))4781		return ret;4782	if (ret == 0)4783		set_inode_flag(inode, FI_PREALLOCATED_ALL);4784	return map.m_len;4785}4786 4787static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,4788					struct iov_iter *from)4789{4790	struct file *file = iocb->ki_filp;4791	struct inode *inode = file_inode(file);4792	ssize_t ret;4793 4794	if (iocb->ki_flags & IOCB_NOWAIT)4795		return -EOPNOTSUPP;4796 4797	ret = generic_perform_write(iocb, from);4798 4799	if (ret > 0) {4800		f2fs_update_iostat(F2FS_I_SB(inode), inode,4801						APP_BUFFERED_IO, ret);4802	}4803	return ret;4804}4805 4806static int f2fs_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error,4807				 unsigned int flags)4808{4809	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));4810 4811	dec_page_count(sbi, F2FS_DIO_WRITE);4812	if (error)4813		return error;4814	f2fs_update_time(sbi, REQ_TIME);4815	f2fs_update_iostat(sbi, NULL, APP_DIRECT_IO, size);4816	return 0;4817}4818 4819static void f2fs_dio_write_submit_io(const struct iomap_iter *iter,4820					struct bio *bio, loff_t file_offset)4821{4822	struct inode *inode = iter->inode;4823	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4824	int seg_type = f2fs_rw_hint_to_seg_type(sbi, inode->i_write_hint);4825	enum temp_type temp = f2fs_get_segment_temp(seg_type);4826 4827	bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, DATA, temp);4828	submit_bio(bio);4829}4830 4831static const struct iomap_dio_ops f2fs_iomap_dio_write_ops = {4832	.end_io		= f2fs_dio_write_end_io,4833	.submit_io	= f2fs_dio_write_submit_io,4834};4835 4836static void f2fs_flush_buffered_write(struct address_space *mapping,4837				      loff_t start_pos, loff_t end_pos)4838{4839	int ret;4840 4841	ret = filemap_write_and_wait_range(mapping, start_pos, end_pos);4842	if (ret < 0)4843		return;4844	invalidate_mapping_pages(mapping,4845				 start_pos >> PAGE_SHIFT,4846				 end_pos >> PAGE_SHIFT);4847}4848 4849static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,4850				   bool *may_need_sync)4851{4852	struct file *file = iocb->ki_filp;4853	struct inode *inode = file_inode(file);4854	struct f2fs_inode_info *fi = F2FS_I(inode);4855	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);4856	const bool do_opu = f2fs_lfs_mode(sbi);4857	const loff_t pos = iocb->ki_pos;4858	const ssize_t count = iov_iter_count(from);4859	unsigned int dio_flags;4860	struct iomap_dio *dio;4861	ssize_t ret;4862 4863	trace_f2fs_direct_IO_enter(inode, iocb, count, WRITE);4864 4865	if (iocb->ki_flags & IOCB_NOWAIT) {4866		/* f2fs_convert_inline_inode() and block allocation can block */4867		if (f2fs_has_inline_data(inode) ||4868		    !f2fs_overwrite_io(inode, pos, count)) {4869			ret = -EAGAIN;4870			goto out;4871		}4872 4873		if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[WRITE])) {4874			ret = -EAGAIN;4875			goto out;4876		}4877		if (do_opu && !f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {4878			f2fs_up_read(&fi->i_gc_rwsem[WRITE]);4879			ret = -EAGAIN;4880			goto out;4881		}4882	} else {4883		ret = f2fs_convert_inline_inode(inode);4884		if (ret)4885			goto out;4886 4887		f2fs_down_read(&fi->i_gc_rwsem[WRITE]);4888		if (do_opu)4889			f2fs_down_read(&fi->i_gc_rwsem[READ]);4890	}4891 4892	/*4893	 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of4894	 * the higher-level function iomap_dio_rw() in order to ensure that the4895	 * F2FS_DIO_WRITE counter will be decremented correctly in all cases.4896	 */4897	inc_page_count(sbi, F2FS_DIO_WRITE);4898	dio_flags = 0;4899	if (pos + count > inode->i_size)4900		dio_flags |= IOMAP_DIO_FORCE_WAIT;4901	dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops,4902			     &f2fs_iomap_dio_write_ops, dio_flags, NULL, 0);4903	if (IS_ERR_OR_NULL(dio)) {4904		ret = PTR_ERR_OR_ZERO(dio);4905		if (ret == -ENOTBLK)4906			ret = 0;4907		if (ret != -EIOCBQUEUED)4908			dec_page_count(sbi, F2FS_DIO_WRITE);4909	} else {4910		ret = iomap_dio_complete(dio);4911	}4912 4913	if (do_opu)4914		f2fs_up_read(&fi->i_gc_rwsem[READ]);4915	f2fs_up_read(&fi->i_gc_rwsem[WRITE]);4916 4917	if (ret < 0)4918		goto out;4919	if (pos + ret > inode->i_size)4920		f2fs_i_size_write(inode, pos + ret);4921	if (!do_opu)4922		set_inode_flag(inode, FI_UPDATE_WRITE);4923 4924	if (iov_iter_count(from)) {4925		ssize_t ret2;4926		loff_t bufio_start_pos = iocb->ki_pos;4927 4928		/*4929		 * The direct write was partial, so we need to fall back to a4930		 * buffered write for the remainder.4931		 */4932 4933		ret2 = f2fs_buffered_write_iter(iocb, from);4934		if (iov_iter_count(from))4935			f2fs_write_failed(inode, iocb->ki_pos);4936		if (ret2 < 0)4937			goto out;4938 4939		/*4940		 * Ensure that the pagecache pages are written to disk and4941		 * invalidated to preserve the expected O_DIRECT semantics.4942		 */4943		if (ret2 > 0) {4944			loff_t bufio_end_pos = bufio_start_pos + ret2 - 1;4945 4946			ret += ret2;4947 4948			f2fs_flush_buffered_write(file->f_mapping,4949						  bufio_start_pos,4950						  bufio_end_pos);4951		}4952	} else {4953		/* iomap_dio_rw() already handled the generic_write_sync(). */4954		*may_need_sync = false;4955	}4956out:4957	trace_f2fs_direct_IO_exit(inode, pos, count, WRITE, ret);4958	return ret;4959}4960 4961static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)4962{4963	struct inode *inode = file_inode(iocb->ki_filp);4964	const loff_t orig_pos = iocb->ki_pos;4965	const size_t orig_count = iov_iter_count(from);4966	loff_t target_size;4967	bool dio;4968	bool may_need_sync = true;4969	int preallocated;4970	const loff_t pos = iocb->ki_pos;4971	const ssize_t count = iov_iter_count(from);4972	ssize_t ret;4973 4974	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {4975		ret = -EIO;4976		goto out;4977	}4978 4979	if (!f2fs_is_compress_backend_ready(inode)) {4980		ret = -EOPNOTSUPP;4981		goto out;4982	}4983 4984	if (iocb->ki_flags & IOCB_NOWAIT) {4985		if (!inode_trylock(inode)) {4986			ret = -EAGAIN;4987			goto out;4988		}4989	} else {4990		inode_lock(inode);4991	}4992 4993	if (f2fs_is_pinned_file(inode) &&4994	    !f2fs_overwrite_io(inode, pos, count)) {4995		ret = -EIO;4996		goto out_unlock;4997	}4998 4999	ret = f2fs_write_checks(iocb, from);5000	if (ret <= 0)5001		goto out_unlock;5002 5003	/* Determine whether we will do a direct write or a buffered write. */5004	dio = f2fs_should_use_dio(inode, iocb, from);5005 5006	/* dio is not compatible w/ atomic write */5007	if (dio && f2fs_is_atomic_file(inode)) {5008		ret = -EOPNOTSUPP;5009		goto out_unlock;5010	}5011 5012	/* Possibly preallocate the blocks for the write. */5013	target_size = iocb->ki_pos + iov_iter_count(from);5014	preallocated = f2fs_preallocate_blocks(iocb, from, dio);5015	if (preallocated < 0) {5016		ret = preallocated;5017	} else {5018		if (trace_f2fs_datawrite_start_enabled())5019			f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,5020						orig_count, WRITE);5021 5022		/* Do the actual write. */5023		ret = dio ?5024			f2fs_dio_write_iter(iocb, from, &may_need_sync) :5025			f2fs_buffered_write_iter(iocb, from);5026 5027		if (trace_f2fs_datawrite_end_enabled())5028			trace_f2fs_datawrite_end(inode, orig_pos, ret);5029	}5030 5031	/* Don't leave any preallocated blocks around past i_size. */5032	if (preallocated && i_size_read(inode) < target_size) {5033		f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);5034		filemap_invalidate_lock(inode->i_mapping);5035		if (!f2fs_truncate(inode))5036			file_dont_truncate(inode);5037		filemap_invalidate_unlock(inode->i_mapping);5038		f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);5039	} else {5040		file_dont_truncate(inode);5041	}5042 5043	clear_inode_flag(inode, FI_PREALLOCATED_ALL);5044out_unlock:5045	inode_unlock(inode);5046out:5047	trace_f2fs_file_write_iter(inode, orig_pos, orig_count, ret);5048 5049	if (ret > 0 && may_need_sync)5050		ret = generic_write_sync(iocb, ret);5051 5052	/* If buffered IO was forced, flush and drop the data from5053	 * the page cache to preserve O_DIRECT semantics5054	 */5055	if (ret > 0 && !dio && (iocb->ki_flags & IOCB_DIRECT))5056		f2fs_flush_buffered_write(iocb->ki_filp->f_mapping,5057					  orig_pos,5058					  orig_pos + ret - 1);5059 5060	return ret;5061}5062 5063static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,5064		int advice)5065{5066	struct address_space *mapping;5067	struct backing_dev_info *bdi;5068	struct inode *inode = file_inode(filp);5069	int err;5070 5071	if (advice == POSIX_FADV_SEQUENTIAL) {5072		if (S_ISFIFO(inode->i_mode))5073			return -ESPIPE;5074 5075		mapping = filp->f_mapping;5076		if (!mapping || len < 0)5077			return -EINVAL;5078 5079		bdi = inode_to_bdi(mapping->host);5080		filp->f_ra.ra_pages = bdi->ra_pages *5081			F2FS_I_SB(inode)->seq_file_ra_mul;5082		spin_lock(&filp->f_lock);5083		filp->f_mode &= ~FMODE_RANDOM;5084		spin_unlock(&filp->f_lock);5085		return 0;5086	} else if (advice == POSIX_FADV_WILLNEED && offset == 0) {5087		/* Load extent cache at the first readahead. */5088		f2fs_precache_extents(inode);5089	}5090 5091	err = generic_fadvise(filp, offset, len, advice);5092	if (!err && advice == POSIX_FADV_DONTNEED &&5093		test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) &&5094		f2fs_compressed_file(inode))5095		f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino);5096 5097	return err;5098}5099 5100#ifdef CONFIG_COMPAT5101struct compat_f2fs_gc_range {5102	u32 sync;5103	compat_u64 start;5104	compat_u64 len;5105};5106#define F2FS_IOC32_GARBAGE_COLLECT_RANGE	_IOW(F2FS_IOCTL_MAGIC, 11,\5107						struct compat_f2fs_gc_range)5108 5109static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg)5110{5111	struct compat_f2fs_gc_range __user *urange;5112	struct f2fs_gc_range range;5113	int err;5114 5115	urange = compat_ptr(arg);5116	err = get_user(range.sync, &urange->sync);5117	err |= get_user(range.start, &urange->start);5118	err |= get_user(range.len, &urange->len);5119	if (err)5120		return -EFAULT;5121 5122	return __f2fs_ioc_gc_range(file, &range);5123}5124 5125struct compat_f2fs_move_range {5126	u32 dst_fd;5127	compat_u64 pos_in;5128	compat_u64 pos_out;5129	compat_u64 len;5130};5131#define F2FS_IOC32_MOVE_RANGE		_IOWR(F2FS_IOCTL_MAGIC, 9,	\5132					struct compat_f2fs_move_range)5133 5134static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg)5135{5136	struct compat_f2fs_move_range __user *urange;5137	struct f2fs_move_range range;5138	int err;5139 5140	urange = compat_ptr(arg);5141	err = get_user(range.dst_fd, &urange->dst_fd);5142	err |= get_user(range.pos_in, &urange->pos_in);5143	err |= get_user(range.pos_out, &urange->pos_out);5144	err |= get_user(range.len, &urange->len);5145	if (err)5146		return -EFAULT;5147 5148	return __f2fs_ioc_move_range(file, &range);5149}5150 5151long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)5152{5153	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))5154		return -EIO;5155	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file))))5156		return -ENOSPC;5157 5158	switch (cmd) {5159	case FS_IOC32_GETVERSION:5160		cmd = FS_IOC_GETVERSION;5161		break;5162	case F2FS_IOC32_GARBAGE_COLLECT_RANGE:5163		return f2fs_compat_ioc_gc_range(file, arg);5164	case F2FS_IOC32_MOVE_RANGE:5165		return f2fs_compat_ioc_move_range(file, arg);5166	case F2FS_IOC_START_ATOMIC_WRITE:5167	case F2FS_IOC_START_ATOMIC_REPLACE:5168	case F2FS_IOC_COMMIT_ATOMIC_WRITE:5169	case F2FS_IOC_START_VOLATILE_WRITE:5170	case F2FS_IOC_RELEASE_VOLATILE_WRITE:5171	case F2FS_IOC_ABORT_ATOMIC_WRITE:5172	case F2FS_IOC_SHUTDOWN:5173	case FITRIM:5174	case FS_IOC_SET_ENCRYPTION_POLICY:5175	case FS_IOC_GET_ENCRYPTION_PWSALT:5176	case FS_IOC_GET_ENCRYPTION_POLICY:5177	case FS_IOC_GET_ENCRYPTION_POLICY_EX:5178	case FS_IOC_ADD_ENCRYPTION_KEY:5179	case FS_IOC_REMOVE_ENCRYPTION_KEY:5180	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:5181	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:5182	case FS_IOC_GET_ENCRYPTION_NONCE:5183	case F2FS_IOC_GARBAGE_COLLECT:5184	case F2FS_IOC_WRITE_CHECKPOINT:5185	case F2FS_IOC_DEFRAGMENT:5186	case F2FS_IOC_FLUSH_DEVICE:5187	case F2FS_IOC_GET_FEATURES:5188	case F2FS_IOC_GET_PIN_FILE:5189	case F2FS_IOC_SET_PIN_FILE:5190	case F2FS_IOC_PRECACHE_EXTENTS:5191	case F2FS_IOC_RESIZE_FS:5192	case FS_IOC_ENABLE_VERITY:5193	case FS_IOC_MEASURE_VERITY:5194	case FS_IOC_READ_VERITY_METADATA:5195	case FS_IOC_GETFSLABEL:5196	case FS_IOC_SETFSLABEL:5197	case F2FS_IOC_GET_COMPRESS_BLOCKS:5198	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:5199	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:5200	case F2FS_IOC_SEC_TRIM_FILE:5201	case F2FS_IOC_GET_COMPRESS_OPTION:5202	case F2FS_IOC_SET_COMPRESS_OPTION:5203	case F2FS_IOC_DECOMPRESS_FILE:5204	case F2FS_IOC_COMPRESS_FILE:5205		break;5206	default:5207		return -ENOIOCTLCMD;5208	}5209	return __f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));5210}5211#endif5212 5213const struct file_operations f2fs_file_operations = {5214	.llseek		= f2fs_llseek,5215	.read_iter	= f2fs_file_read_iter,5216	.write_iter	= f2fs_file_write_iter,5217	.iopoll		= iocb_bio_iopoll,5218	.open		= f2fs_file_open,5219	.release	= f2fs_release_file,5220	.mmap		= f2fs_file_mmap,5221	.flush		= f2fs_file_flush,5222	.fsync		= f2fs_sync_file,5223	.fallocate	= f2fs_fallocate,5224	.unlocked_ioctl	= f2fs_ioctl,5225#ifdef CONFIG_COMPAT5226	.compat_ioctl	= f2fs_compat_ioctl,5227#endif5228	.splice_read	= f2fs_file_splice_read,5229	.splice_write	= iter_file_splice_write,5230	.fadvise	= f2fs_file_fadvise,5231	.fop_flags	= FOP_BUFFER_RASYNC,5232};5233