file.c 26.5 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

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

249 250 251 252
	/* if cp_error was enabled, we should avoid infinite loop */
	if (unlikely(f2fs_cp_error(sbi)))
		goto out;

253 254 255 256
	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
257
	}
258 259 260 261 262 263 264 265 266 267 268 269

	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
270
out:
271
	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
272
	f2fs_trace_ios(NULL, NULL, 1);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
273 274 275
	return ret;
}

276 277 278 279 280 281 282 283 284 285 286
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
287 288 289
	nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
					PAGECACHE_TAG_DIRTY, 1);
	pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310
	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;
}

311 312 313 314 315
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;
316 317 318
	pgoff_t pgofs, end_offset, dirty;
	loff_t data_ofs = offset;
	loff_t isize;
319 320 321 322 323 324 325 326 327
	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
328
	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
329 330 331 332 333 334 335
		if (whence == SEEK_HOLE)
			data_ofs = isize;
		goto found;
	}

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

336 337
	dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);

338 339 340 341 342 343
	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
344
			/* direct node does not exists */
345 346 347 348 349 350 351 352 353
			if (whence == SEEK_DATA) {
				pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
							F2FS_I(inode));
				continue;
			} else {
				goto found;
			}
		}

354
		end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
355 356 357 358

		/* find data/hole in dnode block */
		for (; dn.ofs_in_node < end_offset;
				dn.ofs_in_node++, pgofs++,
359
				data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) {
360 361 362
			block_t blkaddr;
			blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);

363
			if (__found_offset(blkaddr, dirty, pgofs, whence)) {
364 365 366 367 368 369 370 371 372 373
				f2fs_put_dnode(&dn);
				goto found;
			}
		}
		f2fs_put_dnode(&dn);
	}

	if (whence == SEEK_DATA)
		goto fail;
found:
374 375
	if (whence == SEEK_HOLE && data_ofs > isize)
		data_ofs = isize;
376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
	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:
396 397
		if (offset < 0)
			return -ENXIO;
398 399 400 401 402 403
		return f2fs_seek_block(file, offset, whence);
	}

	return -EINVAL;
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
404 405
static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
406 407 408 409 410 411 412 413 414
	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
415 416 417 418 419
	file_accessed(file);
	vma->vm_ops = &f2fs_file_vm_ops;
	return 0;
}

420
int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
421 422
{
	int nr_free = 0, ofs = dn->ofs_in_node;
423
	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
424 425 426
	struct f2fs_node *raw_node;
	__le32 *addr;

427
	raw_node = F2FS_NODE(dn->node_page);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
428 429
	addr = blkaddr_in_node(raw_node) + ofs;

Chris Fries's avatar
Chris Fries committed
430
	for (; count > 0; count--, addr++, dn->ofs_in_node++) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
431 432 433 434
		block_t blkaddr = le32_to_cpu(*addr);
		if (blkaddr == NULL_ADDR)
			continue;

435
		dn->data_blkaddr = NULL_ADDR;
436
		f2fs_update_extent_cache(dn);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
437 438 439 440
		invalidate_blocks(sbi, blkaddr);
		nr_free++;
	}
	if (nr_free) {
441
		dec_valid_block_count(sbi, dn->inode, nr_free);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
442 443 444 445
		set_page_dirty(dn->node_page);
		sync_inode_page(dn);
	}
	dn->ofs_in_node = ofs;
446 447 448

	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
					 dn->ofs_in_node, nr_free);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
449 450 451 452 453 454 455 456
	return nr_free;
}

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

457
static int truncate_partial_data_page(struct inode *inode, u64 from)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
458 459 460 461 462
{
	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	struct page *page;

	if (!offset)
463
		return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
464

465
	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
466
	if (IS_ERR(page))
467
		return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
468 469

	lock_page(page);
470 471 472 473
	if (unlikely(!PageUptodate(page) ||
			page->mapping != inode->i_mapping))
		goto out;

474
	f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
475 476
	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	set_page_dirty(page);
477
out:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
478
	f2fs_put_page(page, 1);
479
	return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
480 481
}

482
int truncate_blocks(struct inode *inode, u64 from, bool lock)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
483
{
484
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
485 486 487
	unsigned int blocksize = inode->i_sb->s_blocksize;
	struct dnode_of_data dn;
	pgoff_t free_from;
488
	int count = 0, err = 0;
489
	struct page *ipage;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
490

491 492
	trace_f2fs_truncate_blocks_enter(inode, from);

493
	free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
494

495 496
	if (lock)
		f2fs_lock_op(sbi);
497

498 499 500 501 502 503 504 505 506 507 508 509
	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);
510
	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
511 512 513
	if (err) {
		if (err == -ENOENT)
			goto free_next;
514
		goto out;
515 516
	}

517
	count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
518 519

	count -= dn.ofs_in_node;
520
	f2fs_bug_on(sbi, count < 0);
521

Jaegeuk Kim's avatar
Jaegeuk Kim committed
522 523 524 525 526 527 528 529
	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);
530 531 532
out:
	if (lock)
		f2fs_unlock_op(sbi);
533 534 535 536

	/* lastly zero out the first data page */
	if (!err)
		err = truncate_partial_data_page(inode, from);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
537

538
	trace_f2fs_truncate_blocks_exit(inode, err);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
539 540 541 542 543 544 545 546 547
	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;

548 549
	trace_f2fs_truncate(inode);

550 551 552 553 554 555
	/* we should check inline_data size */
	if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) {
		if (f2fs_convert_inline_inode(inode))
			return;
	}

556
	if (!truncate_blocks(inode, i_size_read(inode), true)) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
557 558 559 560 561
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
}

562
int f2fs_getattr(struct vfsmount *mnt,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611
			 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;

612 613 614 615 616 617 618 619 620 621 622 623
	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
624 625 626 627 628
	}

	__setattr_copy(inode, attr);

	if (attr->ia_valid & ATTR_MODE) {
629
		err = posix_acl_chmod(inode, get_inode_mode(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
630 631 632 633 634 635 636 637 638 639 640 641 642 643
		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,
644
	.set_acl	= f2fs_set_acl,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
645 646 647 648 649 650
#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
651
	.fiemap		= f2fs_fiemap,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
652 653 654 655 656
};

static void fill_zero(struct inode *inode, pgoff_t index,
					loff_t start, loff_t len)
{
657
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
658 659 660 661 662
	struct page *page;

	if (!len)
		return;

663 664
	f2fs_balance_fs(sbi);

665
	f2fs_lock_op(sbi);
666
	page = get_new_data_page(inode, NULL, index, false);
667
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
668 669

	if (!IS_ERR(page)) {
670
		f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
671 672 673 674 675 676 677 678 679 680 681 682 683
		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;
684

Jaegeuk Kim's avatar
Jaegeuk Kim committed
685
		set_new_dnode(&dn, inode, NULL, NULL, 0);
686
		err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
687 688 689 690 691 692 693 694 695 696 697 698 699
		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;
}

700
static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
701 702 703 704 705
{
	pgoff_t pg_start, pg_end;
	loff_t off_start, off_end;
	int ret = 0;

706 707 708 709 710 711 712
	if (!S_ISREG(inode->i_mode))
		return -EOPNOTSUPP;

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

713 714 715 716 717
	if (f2fs_has_inline_data(inode)) {
		ret = f2fs_convert_inline_inode(inode);
		if (ret)
			return ret;
	}
718

Jaegeuk Kim's avatar
Jaegeuk Kim committed
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737
	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;
738
			struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
739 740

			f2fs_balance_fs(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
741 742 743 744 745

			blk_start = pg_start << PAGE_CACHE_SHIFT;
			blk_end = pg_end << PAGE_CACHE_SHIFT;
			truncate_inode_pages_range(mapping, blk_start,
					blk_end - 1);
746

747
			f2fs_lock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
748
			ret = truncate_hole(inode, pg_start, pg_end);
749
			f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
750 751 752 753 754 755 756 757 758
		}
	}

	return ret;
}

static int expand_inode_data(struct inode *inode, loff_t offset,
					loff_t len, int mode)
{
759
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
760 761 762 763 764
	pgoff_t index, pg_start, pg_end;
	loff_t new_size = i_size_read(inode);
	loff_t off_start, off_end;
	int ret = 0;

765 766
	f2fs_balance_fs(sbi);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
767 768 769 770
	ret = inode_newsize_ok(inode, (len + offset));
	if (ret)
		return ret;

771 772 773 774 775
	if (f2fs_has_inline_data(inode)) {
		ret = f2fs_convert_inline_inode(inode);
		if (ret)
			return ret;
	}
776

Jaegeuk Kim's avatar
Jaegeuk Kim committed
777 778 779 780 781 782
	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);

783 784
	f2fs_lock_op(sbi);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
785 786 787
	for (index = pg_start; index <= pg_end; index++) {
		struct dnode_of_data dn;

788 789 790
		if (index == pg_end && !off_end)
			goto noalloc;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
791
		set_new_dnode(&dn, inode, NULL, NULL, 0);
792 793
		ret = f2fs_reserve_block(&dn, index);
		if (ret)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
794
			break;
795
noalloc:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
796 797 798 799 800 801 802 803 804 805 806 807 808 809
		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);
810
		update_inode_page(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
811
	}
812
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
813 814 815 816 817 818 819

	return ret;
}

static long f2fs_fallocate(struct file *file, int mode,
				loff_t offset, loff_t len)
{
820
	struct inode *inode = file_inode(file);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
821 822 823 824 825
	long ret;

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

826 827
	mutex_lock(&inode->i_mutex);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
828
	if (mode & FALLOC_FL_PUNCH_HOLE)
829
		ret = punch_hole(inode, offset, len);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
830 831 832
	else
		ret = expand_inode_data(inode, offset, len, mode);

833 834 835 836
	if (!ret) {
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
837 838 839

	mutex_unlock(&inode->i_mutex);

840
	trace_f2fs_fallocate(inode, mode, offset, len, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
841 842 843
	return ret;
}

844 845 846 847 848 849 850 851 852 853 854 855 856
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
857 858 859 860 861 862 863 864 865 866 867 868 869
#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;
}

870
static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
871
{
872
	struct inode *inode = file_inode(filp);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
873
	struct f2fs_inode_info *fi = F2FS_I(inode);
874 875 876
	unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
	return put_user(flags, (int __user *)arg);
}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
877

878 879 880 881 882 883 884
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
885

886 887 888
	ret = mnt_want_write_file(filp);
	if (ret)
		return ret;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
889

890 891 892 893
	if (!inode_owner_or_capable(inode)) {
		ret = -EACCES;
		goto out;
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
894

895 896 897 898
	if (get_user(flags, (int __user *)arg)) {
		ret = -EFAULT;
		goto out;
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
899

900
	flags = f2fs_mask_flags(inode->i_mode, flags);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
901

902
	mutex_lock(&inode->i_mutex);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
903

904
	oldflags = fi->i_flags;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
905

906 907 908 909 910
	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
911
		}
912
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
913

914 915 916 917
	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
918

919 920 921
	f2fs_set_inode_flags(inode);
	inode->i_ctime = CURRENT_TIME;
	mark_inode_dirty(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
922
out:
923 924 925
	mnt_drop_write_file(filp);
	return ret;
}
926

927 928 929 930 931 932 933
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
934 935 936 937 938 939 940
static int f2fs_ioc_start_atomic_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);

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

941 942 943 944
	f2fs_balance_fs(F2FS_I_SB(inode));

	if (f2fs_is_atomic_file(inode))
		return 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
945 946 947

	set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);

948
	return f2fs_convert_inline_inode(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
949 950 951 952 953 954 955 956 957 958
}

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;

959 960 961
	if (f2fs_is_volatile_file(inode))
		return 0;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
962 963 964 965 966 967 968 969 970
	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);
971
	clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
972 973 974
	return ret;
}

975 976 977 978 979 980 981
static int f2fs_ioc_start_volatile_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);

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

982 983 984
	if (f2fs_is_volatile_file(inode))
		return 0;

985
	set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
986 987

	return f2fs_convert_inline_inode(inode);
988 989
}

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
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
1032 1033 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
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;
}

1067 1068 1069 1070 1071 1072 1073
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;
1074

1075 1076
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
1077

1078 1079
	if (!blk_queue_discard(q))
		return -EOPNOTSUPP;
1080

1081 1082 1083
	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
				sizeof(range)))
		return -EFAULT;
1084

1085 1086 1087 1088 1089
	range.minlen = max((unsigned int)range.minlen,
				q->limits.discard_granularity);
	ret = f2fs_trim_fs(F2FS_SB(sb), &range);
	if (ret < 0)
		return ret;
1090

1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
	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);
1104 1105
	case F2FS_IOC_GETVERSION:
		return f2fs_ioc_getversion(filp, arg);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
1106 1107 1108 1109
	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);
1110 1111
	case F2FS_IOC_START_VOLATILE_WRITE:
		return f2fs_ioc_start_volatile_write(filp);
1112 1113 1114 1115
	case F2FS_IOC_RELEASE_VOLATILE_WRITE:
		return f2fs_ioc_release_volatile_write(filp);
	case F2FS_IOC_ABORT_VOLATILE_WRITE:
		return f2fs_ioc_abort_volatile_write(filp);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
1116 1117