file.c 26.6 KB
Newer Older
Jaegeuk Kim's avatar
Jaegeuk Kim committed
1
/*
Jaegeuk Kim's avatar
Jaegeuk Kim committed
2 3 4 5 6 7 8 9 10 11 12 13 14 15
 * fs/f2fs/file.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/stat.h>
#include <linux/buffer_head.h>
#include <linux/writeback.h>
16
#include <linux/blkdev.h>
Jaegeuk Kim's avatar
Jaegeuk Kim committed
17 18
#include <linux/falloc.h>
#include <linux/types.h>
19
#include <linux/compat.h>
Jaegeuk Kim's avatar
Jaegeuk Kim committed
20 21
#include <linux/uaccess.h>
#include <linux/mount.h>
22
#include <linux/pagevec.h>
Jaegeuk Kim's avatar
Jaegeuk Kim committed
23 24 25 26 27 28

#include "f2fs.h"
#include "node.h"
#include "segment.h"
#include "xattr.h"
#include "acl.h"
Jaegeuk Kim's avatar
Jaegeuk Kim committed
29
#include "trace.h"
30
#include <trace/events/f2fs.h>
Jaegeuk Kim's avatar
Jaegeuk Kim committed
31 32 33 34 35

static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
						struct vm_fault *vmf)
{
	struct page *page = vmf->page;
36
	struct inode *inode = file_inode(vma->vm_file);
37
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
38
	struct dnode_of_data dn;
39
	int err;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
40 41 42 43

	f2fs_balance_fs(sbi);

	sb_start_pagefault(inode->i_sb);
44 45

	f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
46

Jaegeuk Kim's avatar
Jaegeuk Kim committed
47
	/* block allocation */
48
	f2fs_lock_op(sbi);
49
	set_new_dnode(&dn, inode, NULL, NULL, 0);
50
	err = f2fs_reserve_block(&dn, page->index);
51 52
	if (err) {
		f2fs_unlock_op(sbi);
53
		goto out;
54 55 56
	}
	f2fs_put_dnode(&dn);
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
57

58
	file_update_time(vma->vm_file);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
59
	lock_page(page);
60
	if (unlikely(page->mapping != inode->i_mapping ||
61
			page_offset(page) > i_size_read(inode) ||
62
			!PageUptodate(page))) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
63 64 65 66 67 68 69 70 71
		unlock_page(page);
		err = -EFAULT;
		goto out;
	}

	/*
	 * check to see if the page is mapped already (no holes)
	 */
	if (PageMappedToDisk(page))
72
		goto mapped;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
73 74 75 76 77 78 79 80 81 82

	/* page is wholly or partially inside EOF */
	if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
		unsigned offset;
		offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
		zero_user_segment(page, offset, PAGE_CACHE_SIZE);
	}
	set_page_dirty(page);
	SetPageUptodate(page);

83
	trace_f2fs_vm_page_mkwrite(page, DATA);
84 85
mapped:
	/* fill the page */
86
	f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
87 88 89 90 91 92
out:
	sb_end_pagefault(inode->i_sb);
	return block_page_mkwrite_return(err);
}

static const struct vm_operations_struct f2fs_file_vm_ops = {
93
	.fault		= filemap_fault,
94
	.map_pages	= filemap_map_pages,
95
	.page_mkwrite	= f2fs_vm_page_mkwrite,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
96 97
};

98 99 100 101 102 103 104 105 106 107
static int get_parent_ino(struct inode *inode, nid_t *pino)
{
	struct dentry *dentry;

	inode = igrab(inode);
	dentry = d_find_any_alias(inode);
	iput(inode);
	if (!dentry)
		return 0;

108 109 110 111
	if (update_dent_inode(inode, &dentry->d_name)) {
		dput(dentry);
		return 0;
	}
112

113 114
	*pino = parent_ino(dentry);
	dput(dentry);
115 116 117
	return 1;
}

118 119
static inline bool need_do_checkpoint(struct inode *inode)
{
120
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
121 122 123 124 125 126 127 128 129 130 131 132
	bool need_cp = false;

	if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
		need_cp = true;
	else if (file_wrong_pino(inode))
		need_cp = true;
	else if (!space_for_roll_forward(sbi))
		need_cp = true;
	else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
		need_cp = true;
	else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
		need_cp = true;
133 134
	else if (test_opt(sbi, FASTBOOT))
		need_cp = true;
135 136
	else if (sbi->active_logs == 2)
		need_cp = true;
137 138 139 140

	return need_cp;
}

141 142 143 144 145 146 147 148 149 150 151
static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
{
	struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
	bool ret = false;
	/* But we need to avoid that there are some inode updates */
	if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
		ret = true;
	f2fs_put_page(i, 0);
	return ret;
}

152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
static void try_to_fix_pino(struct inode *inode)
{
	struct f2fs_inode_info *fi = F2FS_I(inode);
	nid_t pino;

	down_write(&fi->i_sem);
	fi->xattr_ver = 0;
	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
			get_parent_ino(inode, &pino)) {
		fi->i_pino = pino;
		file_got_pino(inode);
		up_write(&fi->i_sem);

		mark_inode_dirty_sync(inode);
		f2fs_write_inode(inode, NULL);
	} else {
		up_write(&fi->i_sem);
	}
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
172 173 174
int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
	struct inode *inode = file->f_mapping->host;
175
	struct f2fs_inode_info *fi = F2FS_I(inode);
176
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
177
	nid_t ino = inode->i_ino;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
178 179 180
	int ret = 0;
	bool need_cp = false;
	struct writeback_control wbc = {
181
		.sync_mode = WB_SYNC_ALL,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
182 183 184 185
		.nr_to_write = LONG_MAX,
		.for_reclaim = 0,
	};

186
	if (unlikely(f2fs_readonly(inode->i_sb)))
187 188
		return 0;

189
	trace_f2fs_sync_file_enter(inode);
190 191

	/* if fdatasync is triggered, let's do in-place-update */
192
	if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
193
		set_inode_flag(fi, FI_NEED_IPU);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
194
	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
195 196
	clear_inode_flag(fi, FI_NEED_IPU);

197 198
	if (ret) {
		trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
199
		return ret;
200
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
201

202 203 204 205 206 207
	/* if the inode is dirty, let's recover all the time */
	if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) {
		update_inode_page(inode);
		goto go_write;
	}

208 209 210 211
	/*
	 * if there is no written data, don't waste time to write recovery info.
	 */
	if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
212
			!exist_written_data(sbi, ino, APPEND_INO)) {
213

214 215
		/* it may call write_inode just prior to fsync */
		if (need_inode_page_update(sbi, ino))
216 217
			goto go_write;

218
		if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
219
				exist_written_data(sbi, ino, UPDATE_INO))
220 221 222
			goto flush_out;
		goto out;
	}
223
go_write:
224 225 226
	/* guarantee free sections for fsync */
	f2fs_balance_fs(sbi);

227 228 229 230
	/*
	 * Both of fdatasync() and fsync() are able to be recovered from
	 * sudden-power-off.
	 */
231 232
	down_read(&fi->i_sem);
	need_cp = need_do_checkpoint(inode);
233 234
	up_read(&fi->i_sem);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
235 236 237
	if (need_cp) {
		/* all the dirty node pages should be flushed for POR */
		ret = f2fs_sync_fs(inode->i_sb, 1);
238

239 240 241 242 243
		/*
		 * We've secured consistency through sync_fs. Following pino
		 * will be used only for fsynced inodes after checkpoint.
		 */
		try_to_fix_pino(inode);
244 245
		clear_inode_flag(fi, FI_APPEND_WRITE);
		clear_inode_flag(fi, FI_UPDATE_WRITE);
246 247
		goto out;
	}
248
sync_nodes:
249 250
	sync_node_pages(sbi, ino, &wbc);

251 252 253 254
	/* if cp_error was enabled, we should avoid infinite loop */
	if (unlikely(f2fs_cp_error(sbi)))
		goto out;

255 256 257 258
	if (need_inode_block_update(sbi, ino)) {
		mark_inode_dirty_sync(inode);
		f2fs_write_inode(inode, NULL);
		goto sync_nodes;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
259
	}
260 261 262 263 264 265 266 267 268 269 270 271

	ret = wait_on_node_pages_writeback(sbi, ino);
	if (ret)
		goto out;

	/* once recovery info is written, don't need to tack this */
	remove_dirty_inode(sbi, ino, APPEND_INO);
	clear_inode_flag(fi, FI_APPEND_WRITE);
flush_out:
	remove_dirty_inode(sbi, ino, UPDATE_INO);
	clear_inode_flag(fi, FI_UPDATE_WRITE);
	ret = f2fs_issue_flush(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
272
out:
273
	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
274
	f2fs_trace_ios(NULL, NULL, 1);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
275 276 277
	return ret;
}

278 279 280 281 282 283 284 285 286 287 288
static pgoff_t __get_first_dirty_index(struct address_space *mapping,
						pgoff_t pgofs, int whence)
{
	struct pagevec pvec;
	int nr_pages;

	if (whence != SEEK_DATA)
		return 0;

	/* find first dirty page index */
	pagevec_init(&pvec, 0);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
289 290 291
	nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
					PAGECACHE_TAG_DIRTY, 1);
	pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312
	pagevec_release(&pvec);
	return pgofs;
}

static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
							int whence)
{
	switch (whence) {
	case SEEK_DATA:
		if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
			(blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
			return true;
		break;
	case SEEK_HOLE:
		if (blkaddr == NULL_ADDR)
			return true;
		break;
	}
	return false;
}

313 314 315 316 317
static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
{
	struct inode *inode = file->f_mapping->host;
	loff_t maxbytes = inode->i_sb->s_maxbytes;
	struct dnode_of_data dn;
318 319 320
	pgoff_t pgofs, end_offset, dirty;
	loff_t data_ofs = offset;
	loff_t isize;
321 322 323 324 325 326 327 328 329
	int err = 0;

	mutex_lock(&inode->i_mutex);

	isize = i_size_read(inode);
	if (offset >= isize)
		goto fail;

	/* handle inline data case */
Chao Yu's avatar
Chao Yu committed
330
	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
331 332 333 334 335 336 337
		if (whence == SEEK_HOLE)
			data_ofs = isize;
		goto found;
	}

	pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT);

338 339
	dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);

340 341 342 343 344 345
	for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) {
		set_new_dnode(&dn, inode, NULL, NULL, 0);
		err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
		if (err && err != -ENOENT) {
			goto fail;
		} else if (err == -ENOENT) {
arter97's avatar
arter97 committed
346
			/* direct node does not exists */
347 348 349 350 351 352 353 354 355
			if (whence == SEEK_DATA) {
				pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
							F2FS_I(inode));
				continue;
			} else {
				goto found;
			}
		}

356
		end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
357 358 359 360

		/* find data/hole in dnode block */
		for (; dn.ofs_in_node < end_offset;
				dn.ofs_in_node++, pgofs++,
361
				data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) {
362 363 364
			block_t blkaddr;
			blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);

365
			if (__found_offset(blkaddr, dirty, pgofs, whence)) {
366 367 368 369 370 371 372 373 374 375
				f2fs_put_dnode(&dn);
				goto found;
			}
		}
		f2fs_put_dnode(&dn);
	}

	if (whence == SEEK_DATA)
		goto fail;
found:
376 377
	if (whence == SEEK_HOLE && data_ofs > isize)
		data_ofs = isize;
378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397
	mutex_unlock(&inode->i_mutex);
	return vfs_setpos(file, data_ofs, maxbytes);
fail:
	mutex_unlock(&inode->i_mutex);
	return -ENXIO;
}

static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
{
	struct inode *inode = file->f_mapping->host;
	loff_t maxbytes = inode->i_sb->s_maxbytes;

	switch (whence) {
	case SEEK_SET:
	case SEEK_CUR:
	case SEEK_END:
		return generic_file_llseek_size(file, offset, whence,
						maxbytes, i_size_read(inode));
	case SEEK_DATA:
	case SEEK_HOLE:
398 399
		if (offset < 0)
			return -ENXIO;
400 401 402 403 404 405
		return f2fs_seek_block(file, offset, whence);
	}

	return -EINVAL;
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
406 407
static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
408 409 410 411 412 413 414 415 416
	struct inode *inode = file_inode(file);

	/* we don't need to use inline_data strictly */
	if (f2fs_has_inline_data(inode)) {
		int err = f2fs_convert_inline_inode(inode);
		if (err)
			return err;
	}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
417 418 419 420 421
	file_accessed(file);
	vma->vm_ops = &f2fs_file_vm_ops;
	return 0;
}

422
int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
423 424
{
	int nr_free = 0, ofs = dn->ofs_in_node;
425
	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
426 427 428
	struct f2fs_node *raw_node;
	__le32 *addr;

429
	raw_node = F2FS_NODE(dn->node_page);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
430 431
	addr = blkaddr_in_node(raw_node) + ofs;

Chris Fries's avatar
Chris Fries committed
432
	for (; count > 0; count--, addr++, dn->ofs_in_node++) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
433 434 435 436
		block_t blkaddr = le32_to_cpu(*addr);
		if (blkaddr == NULL_ADDR)
			continue;

437
		dn->data_blkaddr = NULL_ADDR;
438
		f2fs_update_extent_cache(dn);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
439 440 441 442
		invalidate_blocks(sbi, blkaddr);
		nr_free++;
	}
	if (nr_free) {
443
		dec_valid_block_count(sbi, dn->inode, nr_free);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
444 445 446 447
		set_page_dirty(dn->node_page);
		sync_inode_page(dn);
	}
	dn->ofs_in_node = ofs;
448 449 450

	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
					 dn->ofs_in_node, nr_free);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
451 452 453 454 455 456 457 458
	return nr_free;
}

void truncate_data_blocks(struct dnode_of_data *dn)
{
	truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
}

459
static int truncate_partial_data_page(struct inode *inode, u64 from)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
460 461 462 463 464
{
	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	struct page *page;

	if (!offset)
465
		return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
466

467
	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
468
	if (IS_ERR(page))
469
		return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
470 471

	lock_page(page);
472 473 474 475
	if (unlikely(!PageUptodate(page) ||
			page->mapping != inode->i_mapping))
		goto out;

476
	f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
477 478
	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	set_page_dirty(page);
479
out:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
480
	f2fs_put_page(page, 1);
481
	return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
482 483
}

484
int truncate_blocks(struct inode *inode, u64 from, bool lock)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
485
{
486
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
487 488 489
	unsigned int blocksize = inode->i_sb->s_blocksize;
	struct dnode_of_data dn;
	pgoff_t free_from;
490
	int count = 0, err = 0;
491
	struct page *ipage;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
492

493 494
	trace_f2fs_truncate_blocks_enter(inode, from);

495
	free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
496

497 498
	if (lock)
		f2fs_lock_op(sbi);
499

500 501 502 503 504 505 506 507 508 509 510 511
	ipage = get_node_page(sbi, inode->i_ino);
	if (IS_ERR(ipage)) {
		err = PTR_ERR(ipage);
		goto out;
	}

	if (f2fs_has_inline_data(inode)) {
		f2fs_put_page(ipage, 1);
		goto out;
	}

	set_new_dnode(&dn, inode, ipage, NULL, 0);
512
	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
513 514 515
	if (err) {
		if (err == -ENOENT)
			goto free_next;
516
		goto out;
517 518
	}

519
	count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
520 521

	count -= dn.ofs_in_node;
522
	f2fs_bug_on(sbi, count < 0);
523

Jaegeuk Kim's avatar
Jaegeuk Kim committed
524 525 526 527 528 529 530 531
	if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
		truncate_data_blocks_range(&dn, count);
		free_from += count;
	}

	f2fs_put_dnode(&dn);
free_next:
	err = truncate_inode_blocks(inode, free_from);
532 533 534
out:
	if (lock)
		f2fs_unlock_op(sbi);
535 536 537 538

	/* lastly zero out the first data page */
	if (!err)
		err = truncate_partial_data_page(inode, from);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
539

540
	trace_f2fs_truncate_blocks_exit(inode, err);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
541 542 543 544 545 546 547 548 549
	return err;
}

void f2fs_truncate(struct inode *inode)
{
	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
				S_ISLNK(inode->i_mode)))
		return;

550 551
	trace_f2fs_truncate(inode);

552 553 554 555 556 557
	/* we should check inline_data size */
	if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) {
		if (f2fs_convert_inline_inode(inode))
			return;
	}

558
	if (!truncate_blocks(inode, i_size_read(inode), true)) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
559 560 561 562 563
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
}

564
int f2fs_getattr(struct vfsmount *mnt,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613
			 struct dentry *dentry, struct kstat *stat)
{
	struct inode *inode = dentry->d_inode;
	generic_fillattr(inode, stat);
	stat->blocks <<= 3;
	return 0;
}

#ifdef CONFIG_F2FS_FS_POSIX_ACL
static void __setattr_copy(struct inode *inode, const struct iattr *attr)
{
	struct f2fs_inode_info *fi = F2FS_I(inode);
	unsigned int ia_valid = attr->ia_valid;

	if (ia_valid & ATTR_UID)
		inode->i_uid = attr->ia_uid;
	if (ia_valid & ATTR_GID)
		inode->i_gid = attr->ia_gid;
	if (ia_valid & ATTR_ATIME)
		inode->i_atime = timespec_trunc(attr->ia_atime,
						inode->i_sb->s_time_gran);
	if (ia_valid & ATTR_MTIME)
		inode->i_mtime = timespec_trunc(attr->ia_mtime,
						inode->i_sb->s_time_gran);
	if (ia_valid & ATTR_CTIME)
		inode->i_ctime = timespec_trunc(attr->ia_ctime,
						inode->i_sb->s_time_gran);
	if (ia_valid & ATTR_MODE) {
		umode_t mode = attr->ia_mode;

		if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
			mode &= ~S_ISGID;
		set_acl_inode(fi, mode);
	}
}
#else
#define __setattr_copy setattr_copy
#endif

int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = dentry->d_inode;
	struct f2fs_inode_info *fi = F2FS_I(inode);
	int err;

	err = inode_change_ok(inode, attr);
	if (err)
		return err;

614 615 616 617 618 619 620 621 622 623 624 625
	if (attr->ia_valid & ATTR_SIZE) {
		if (attr->ia_size != i_size_read(inode)) {
			truncate_setsize(inode, attr->ia_size);
			f2fs_truncate(inode);
			f2fs_balance_fs(F2FS_I_SB(inode));
		} else {
			/*
			 * giving a chance to truncate blocks past EOF which
			 * are fallocated with FALLOC_FL_KEEP_SIZE.
			 */
			f2fs_truncate(inode);
		}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
626 627 628 629 630
	}

	__setattr_copy(inode, attr);

	if (attr->ia_valid & ATTR_MODE) {
631
		err = posix_acl_chmod(inode, get_inode_mode(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
632 633 634 635 636 637 638 639 640 641 642 643 644 645
		if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
			inode->i_mode = fi->i_acl_mode;
			clear_inode_flag(fi, FI_ACL_MODE);
		}
	}

	mark_inode_dirty(inode);
	return err;
}

const struct inode_operations f2fs_file_inode_operations = {
	.getattr	= f2fs_getattr,
	.setattr	= f2fs_setattr,
	.get_acl	= f2fs_get_acl,
646
	.set_acl	= f2fs_set_acl,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
647 648 649 650 651 652
#ifdef CONFIG_F2FS_FS_XATTR
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.listxattr	= f2fs_listxattr,
	.removexattr	= generic_removexattr,
#endif
Jaegeuk Kim's avatar
Jaegeuk Kim committed
653
	.fiemap		= f2fs_fiemap,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
654 655 656 657 658
};

static void fill_zero(struct inode *inode, pgoff_t index,
					loff_t start, loff_t len)
{
659
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
660 661 662 663 664
	struct page *page;

	if (!len)
		return;

665 666
	f2fs_balance_fs(sbi);

667
	f2fs_lock_op(sbi);
668
	page = get_new_data_page(inode, NULL, index, false);
669
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
670 671

	if (!IS_ERR(page)) {
672
		f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
673 674 675 676 677 678 679 680 681 682 683 684 685
		zero_user(page, start, len);
		set_page_dirty(page);
		f2fs_put_page(page, 1);
	}
}

int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
{
	pgoff_t index;
	int err;

	for (index = pg_start; index < pg_end; index++) {
		struct dnode_of_data dn;
686

Jaegeuk Kim's avatar
Jaegeuk Kim committed
687
		set_new_dnode(&dn, inode, NULL, NULL, 0);
688
		err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
689 690 691 692 693 694 695 696 697 698 699 700 701
		if (err) {
			if (err == -ENOENT)
				continue;
			return err;
		}

		if (dn.data_blkaddr != NULL_ADDR)
			truncate_data_blocks_range(&dn, 1);
		f2fs_put_dnode(&dn);
	}
	return 0;
}

702
static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
703 704 705 706 707
{
	pgoff_t pg_start, pg_end;
	loff_t off_start, off_end;
	int ret = 0;

708 709 710 711 712 713 714
	if (!S_ISREG(inode->i_mode))
		return -EOPNOTSUPP;

	/* skip punching hole beyond i_size */
	if (offset >= inode->i_size)
		return ret;

715 716 717 718 719
	if (f2fs_has_inline_data(inode)) {
		ret = f2fs_convert_inline_inode(inode);
		if (ret)
			return ret;
	}
720

Jaegeuk Kim's avatar
Jaegeuk Kim committed
721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739
	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;

	off_start = offset & (PAGE_CACHE_SIZE - 1);
	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);

	if (pg_start == pg_end) {
		fill_zero(inode, pg_start, off_start,
						off_end - off_start);
	} else {
		if (off_start)
			fill_zero(inode, pg_start++, off_start,
					PAGE_CACHE_SIZE - off_start);
		if (off_end)
			fill_zero(inode, pg_end, 0, off_end);

		if (pg_start < pg_end) {
			struct address_space *mapping = inode->i_mapping;
			loff_t blk_start, blk_end;
740
			struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
741 742

			f2fs_balance_fs(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
743 744 745 746 747

			blk_start = pg_start << PAGE_CACHE_SHIFT;
			blk_end = pg_end << PAGE_CACHE_SHIFT;
			truncate_inode_pages_range(mapping, blk_start,
					blk_end - 1);
748

749
			f2fs_lock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
750
			ret = truncate_hole(inode, pg_start, pg_end);
751
			f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
752 753 754 755 756 757 758 759 760
		}
	}

	return ret;
}

static int expand_inode_data(struct inode *inode, loff_t offset,
					loff_t len, int mode)
{
761
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
762 763 764 765 766
	pgoff_t index, pg_start, pg_end;
	loff_t new_size = i_size_read(inode);
	loff_t off_start, off_end;
	int ret = 0;

767 768
	f2fs_balance_fs(sbi);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
769 770 771 772
	ret = inode_newsize_ok(inode, (len + offset));
	if (ret)
		return ret;

773 774 775 776 777
	if (f2fs_has_inline_data(inode)) {
		ret = f2fs_convert_inline_inode(inode);
		if (ret)
			return ret;
	}
778

Jaegeuk Kim's avatar
Jaegeuk Kim committed
779 780 781 782 783 784
	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;

	off_start = offset & (PAGE_CACHE_SIZE - 1);
	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);

785 786
	f2fs_lock_op(sbi);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
787 788 789
	for (index = pg_start; index <= pg_end; index++) {
		struct dnode_of_data dn;

790 791 792
		if (index == pg_end && !off_end)
			goto noalloc;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
793
		set_new_dnode(&dn, inode, NULL, NULL, 0);
794 795
		ret = f2fs_reserve_block(&dn, index);
		if (ret)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
796
			break;
797
noalloc:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
798 799 800 801 802 803 804 805 806 807 808 809 810 811
		if (pg_start == pg_end)
			new_size = offset + len;
		else if (index == pg_start && off_start)
			new_size = (index + 1) << PAGE_CACHE_SHIFT;
		else if (index == pg_end)
			new_size = (index << PAGE_CACHE_SHIFT) + off_end;
		else
			new_size += PAGE_CACHE_SIZE;
	}

	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
		i_size_read(inode) < new_size) {
		i_size_write(inode, new_size);
		mark_inode_dirty(inode);
812
		update_inode_page(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
813
	}
814
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
815 816 817 818 819 820 821

	return ret;
}

static long f2fs_fallocate(struct file *file, int mode,
				loff_t offset, loff_t len)
{
822
	struct inode *inode = file_inode(file);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
823 824 825 826 827
	long ret;

	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
		return -EOPNOTSUPP;

828 829
	mutex_lock(&inode->i_mutex);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
830
	if (mode & FALLOC_FL_PUNCH_HOLE)
831
		ret = punch_hole(inode, offset, len);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
832 833 834
	else
		ret = expand_inode_data(inode, offset, len, mode);

835 836 837 838
	if (!ret) {
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
839 840 841

	mutex_unlock(&inode->i_mutex);

842
	trace_f2fs_fallocate(inode, mode, offset, len, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
843 844 845
	return ret;
}

846 847 848 849 850 851 852 853 854 855 856 857 858
static int f2fs_release_file(struct inode *inode, struct file *filp)
{
	/* some remained atomic pages should discarded */
	if (f2fs_is_atomic_file(inode))
		commit_inmem_pages(inode, true);
	if (f2fs_is_volatile_file(inode)) {
		set_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
		filemap_fdatawrite(inode->i_mapping);
		clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
	}
	return 0;
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
859 860 861 862 863 864 865 866 867 868 869 870 871
#define F2FS_REG_FLMASK		(~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
#define F2FS_OTHER_FLMASK	(FS_NODUMP_FL | FS_NOATIME_FL)

static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
{
	if (S_ISDIR(mode))
		return flags;
	else if (S_ISREG(mode))
		return flags & F2FS_REG_FLMASK;
	else
		return flags & F2FS_OTHER_FLMASK;
}

872
static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
873
{
874
	struct inode *inode = file_inode(filp);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
875
	struct f2fs_inode_info *fi = F2FS_I(inode);
876 877 878
	unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
	return put_user(flags, (int __user *)arg);
}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
879

880 881 882 883 884 885 886
static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct f2fs_inode_info *fi = F2FS_I(inode);
	unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
	unsigned int oldflags;
	int ret;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
887

888 889 890
	ret = mnt_want_write_file(filp);
	if (ret)
		return ret;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
891

892 893 894 895
	if (!inode_owner_or_capable(inode)) {
		ret = -EACCES;
		goto out;
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
896

897 898 899 900
	if (get_user(flags, (int __user *)arg)) {
		ret = -EFAULT;
		goto out;
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
901

902
	flags = f2fs_mask_flags(inode->i_mode, flags);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
903

904
	mutex_lock(&inode->i_mutex);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
905

906
	oldflags = fi->i_flags;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
907

908 909 910 911 912
	if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
		if (!capable(CAP_LINUX_IMMUTABLE)) {
			mutex_unlock(&inode->i_mutex);
			ret = -EPERM;
			goto out;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
913
		}
914
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
915

916 917 918 919
	flags = flags & FS_FL_USER_MODIFIABLE;
	flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
	fi->i_flags = flags;
	mutex_unlock(&inode->i_mutex);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
920

921 922 923
	f2fs_set_inode_flags(inode);
	inode->i_ctime = CURRENT_TIME;
	mark_inode_dirty(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
924
out:
925 926 927
	mnt_drop_write_file(filp);
	return ret;
}
928

929 930 931 932 933 934 935
static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
{
	struct inode *inode = file_inode(filp);

	return put_user(inode->i_generation, (int __user *)arg);
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
936 937 938 939 940 941 942
static int f2fs_ioc_start_atomic_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);

	if (!inode_owner_or_capable(inode))
		return -EACCES;

943 944 945 946
	f2fs_balance_fs(F2FS_I_SB(inode));

	if (f2fs_is_atomic_file(inode))
		return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
947 948 949

	set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);

950
	return f2fs_convert_inline_inode(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
951 952 953 954 955 956 957 958 959 960
}

static int f2fs_ioc_commit_atomic_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);
	int ret;

	if (!inode_owner_or_capable(inode))
		return -EACCES;

961 962 963
	if (f2fs_is_volatile_file(inode))
		return 0;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
964 965 966 967 968 969 970 971 972
	ret = mnt_want_write_file(filp);
	if (ret)
		return ret;

	if (f2fs_is_atomic_file(inode))
		commit_inmem_pages(inode, false);

	ret = f2fs_sync_file(filp, 0, LONG_MAX, 0);
	mnt_drop_write_file(filp);
973
	clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
974 975 976
	return ret;
}

977 978 979 980 981 982 983
static int f2fs_ioc_start_volatile_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);

	if (!inode_owner_or_capable(inode))
		return -EACCES;

984 985 986
	if (f2fs_is_volatile_file(inode))
		return 0;

987
	set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
988 989

	return f2fs_convert_inline_inode(inode);
990 991
}

992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
static int f2fs_ioc_release_volatile_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);

	if (!inode_owner_or_capable(inode))
		return -EACCES;

	if (!f2fs_is_volatile_file(inode))
		return 0;

	punch_hole(inode, 0, F2FS_BLKSIZE);
	return 0;
}

static int f2fs_ioc_abort_volatile_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);
	int ret;

	if (!inode_owner_or_capable(inode))
		return -EACCES;

	ret = mnt_want_write_file(filp);
	if (ret)
		return ret;

	f2fs_balance_fs(F2FS_I_SB(inode));

	if (f2fs_is_atomic_file(inode)) {
		commit_inmem_pages(inode, false);
		clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
	}

	if (f2fs_is_volatile_file(inode)) {
		clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
		filemap_fdatawrite(inode->i_mapping);
		set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
	}
	mnt_drop_write_file(filp);
	return ret;
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct super_block *sb = sbi->sb;
	__u32 in;

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

	if (get_user(in, (__u32 __user *)arg))
		return -EFAULT;

	switch (in) {
	case F2FS_GOING_DOWN_FULLSYNC:
		sb = freeze_bdev(sb->s_bdev);
		if (sb && !IS_ERR(sb)) {
			f2fs_stop_checkpoint(sbi);
			thaw_bdev(sb->s_bdev, sb);
		}
		break;
	case F2FS_GOING_DOWN_METASYNC:
		/* do checkpoint only */
		f2fs_sync_fs(sb, 1);
		f2fs_stop_checkpoint(sbi);
		break;
	case F2FS_GOING_DOWN_NOSYNC:
		f2fs_stop_checkpoint(sbi);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

1069 1070 1071 1072 1073 1074 1075
static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct super_block *sb = inode->i_sb;
	struct request_queue *q = bdev_get_queue(sb->s_bdev);
	struct fstrim_range range;
	int ret;
1076

1077 1078
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
1079

1080 1081
	if (!blk_queue_discard(q))
		return -EOPNOTSUPP;
1082

1083 1084 1085
	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
				sizeof(range)))
		return -EFAULT;
1086

1087 1088 1089 1090 1091
	range.minlen = max((unsigned int)range.minlen,
				q->limits.discard_granularity);
	ret = f2fs_trim_fs(F2FS_SB(sb), &range);
	if (ret < 0)
		return ret;
1092

1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
	if (copy_to_user((struct fstrim_range __user *)arg, &range,
				sizeof(range)))
		return -EFAULT;
	return 0;
}

long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	switch (cmd) {
	case F2FS_IOC_GETFLAGS:
		return f2fs_ioc_getflags(filp, arg);
	case F2FS_IOC_SETFLAGS:
		return f2fs_ioc_setflags(filp, arg);
1106 1107
	case F2FS_IOC_GETVERSION:
		return f2fs_ioc_getversion(filp, arg);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
1108 1109 1110 1111
	case F2FS_IOC_START_ATOMIC_WRITE:
		return f2fs_ioc_start_atomic_write(filp);
	case F2FS_IOC_COMMIT_ATOMIC_WRITE:
		return f2fs_ioc_commit_atomic_write(filp);
1112 1113
	case F2FS_IOC_START_VOLATILE_WRITE:
		return f2fs_ioc_start_volatile_write(filp);