file.c 22.9 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"
29
#include <trace/events/f2fs.h>
Jaegeuk Kim's avatar
Jaegeuk Kim committed
30 31 32 33 34

static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
						struct vm_fault *vmf)
{
	struct page *page = vmf->page;
35
	struct inode *inode = file_inode(vma->vm_file);
36
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
37
	struct dnode_of_data dn;
38
	int err;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
39 40 41 42 43

	f2fs_balance_fs(sbi);

	sb_start_pagefault(inode->i_sb);

44 45 46 47 48
	/* force to convert with normal data indices */
	err = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, page);
	if (err)
		goto out;

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

57
	file_update_time(vma->vm_file);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
58
	lock_page(page);
59
	if (unlikely(page->mapping != inode->i_mapping ||
60
			page_offset(page) > i_size_read(inode) ||
61
			!PageUptodate(page))) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
62 63 64 65 66 67 68 69 70
		unlock_page(page);
		err = -EFAULT;
		goto out;
	}

	/*
	 * check to see if the page is mapped already (no holes)
	 */
	if (PageMappedToDisk(page))
71
		goto mapped;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
72 73 74 75 76 77 78 79 80 81

	/* 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);

82
	trace_f2fs_vm_page_mkwrite(page, DATA);
83 84
mapped:
	/* fill the page */
85
	f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
86 87 88 89 90 91
out:
	sb_end_pagefault(inode->i_sb);
	return block_page_mkwrite_return(err);
}

static const struct vm_operations_struct f2fs_file_vm_ops = {
92
	.fault		= filemap_fault,
93
	.map_pages	= filemap_map_pages,
94 95
	.page_mkwrite	= f2fs_vm_page_mkwrite,
	.remap_pages	= generic_file_remap_pages,
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);
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
	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;

	return need_cp;
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
137 138 139
int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
	struct inode *inode = file->f_mapping->host;
140
	struct f2fs_inode_info *fi = F2FS_I(inode);
141
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
142
	nid_t ino = inode->i_ino;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
143 144 145
	int ret = 0;
	bool need_cp = false;
	struct writeback_control wbc = {
146
		.sync_mode = WB_SYNC_ALL,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
147 148 149 150
		.nr_to_write = LONG_MAX,
		.for_reclaim = 0,
	};

151
	if (unlikely(f2fs_readonly(inode->i_sb)))
152 153
		return 0;

154
	trace_f2fs_sync_file_enter(inode);
155 156

	/* if fdatasync is triggered, let's do in-place-update */
157
	if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
158
		set_inode_flag(fi, FI_NEED_IPU);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
159
	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
160 161
	clear_inode_flag(fi, FI_NEED_IPU);

162 163
	if (ret) {
		trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
164
		return ret;
165
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
166

167 168 169 170
	/*
	 * if there is no written data, don't waste time to write recovery info.
	 */
	if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
171
			!exist_written_data(sbi, ino, APPEND_INO)) {
172 173 174 175 176 177 178 179 180
		struct page *i = find_get_page(NODE_MAPPING(sbi), ino);

		/* But we need to avoid that there are some inode updates */
		if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) {
			f2fs_put_page(i, 0);
			goto go_write;
		}
		f2fs_put_page(i, 0);

181
		if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
182
				exist_written_data(sbi, ino, UPDATE_INO))
183 184 185
			goto flush_out;
		goto out;
	}
186
go_write:
187 188 189
	/* guarantee free sections for fsync */
	f2fs_balance_fs(sbi);

190 191 192 193
	/*
	 * Both of fdatasync() and fsync() are able to be recovered from
	 * sudden-power-off.
	 */
194 195
	down_read(&fi->i_sem);
	need_cp = need_do_checkpoint(inode);
196 197
	up_read(&fi->i_sem);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
198
	if (need_cp) {
199 200
		nid_t pino;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
201 202
		/* all the dirty node pages should be flushed for POR */
		ret = f2fs_sync_fs(inode->i_sb, 1);
203 204 205

		down_write(&fi->i_sem);
		F2FS_I(inode)->xattr_ver = 0;
206 207 208 209
		if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
					get_parent_ino(inode, &pino)) {
			F2FS_I(inode)->i_pino = pino;
			file_got_pino(inode);
210
			up_write(&fi->i_sem);
211 212 213 214
			mark_inode_dirty_sync(inode);
			ret = f2fs_write_inode(inode, NULL);
			if (ret)
				goto out;
215 216
		} else {
			up_write(&fi->i_sem);
217
		}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
218
	} else {
219 220 221 222
sync_nodes:
		sync_node_pages(sbi, ino, &wbc);

		if (need_inode_block_update(sbi, ino)) {
223
			mark_inode_dirty_sync(inode);
224 225 226
			ret = f2fs_write_inode(inode, NULL);
			if (ret)
				goto out;
227
			goto sync_nodes;
228
		}
229

230
		ret = wait_on_node_pages_writeback(sbi, ino);
231 232
		if (ret)
			goto out;
233 234

		/* once recovery info is written, don't need to tack this */
235
		remove_dirty_inode(sbi, ino, APPEND_INO);
236 237
		clear_inode_flag(fi, FI_APPEND_WRITE);
flush_out:
238
		remove_dirty_inode(sbi, ino, UPDATE_INO);
239
		clear_inode_flag(fi, FI_UPDATE_WRITE);
240
		ret = f2fs_issue_flush(F2FS_I_SB(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
241 242
	}
out:
243
	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
244 245 246
	return ret;
}

247 248 249 250 251 252 253 254 255 256 257
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
258 259 260
	nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
					PAGECACHE_TAG_DIRTY, 1);
	pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281
	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;
}

282 283 284 285 286
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;
287 288 289
	pgoff_t pgofs, end_offset, dirty;
	loff_t data_ofs = offset;
	loff_t isize;
290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306
	int err = 0;

	mutex_lock(&inode->i_mutex);

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

	/* handle inline data case */
	if (f2fs_has_inline_data(inode)) {
		if (whence == SEEK_HOLE)
			data_ofs = isize;
		goto found;
	}

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

307 308
	dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);

309 310 311 312 313 314
	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
315
			/* direct node does not exists */
316 317 318 319 320 321 322 323 324
			if (whence == SEEK_DATA) {
				pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
							F2FS_I(inode));
				continue;
			} else {
				goto found;
			}
		}

325
		end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
326 327 328 329 330 331 332 333

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

334
			if (__found_offset(blkaddr, dirty, pgofs, whence)) {
335 336 337 338 339 340 341 342 343 344
				f2fs_put_dnode(&dn);
				goto found;
			}
		}
		f2fs_put_dnode(&dn);
	}

	if (whence == SEEK_DATA)
		goto fail;
found:
345 346
	if (whence == SEEK_HOLE && data_ofs > isize)
		data_ofs = isize;
347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366
	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:
367 368
		if (offset < 0)
			return -ENXIO;
369 370 371 372 373 374
		return f2fs_seek_block(file, offset, whence);
	}

	return -EINVAL;
}

Jaegeuk Kim's avatar
Jaegeuk Kim committed
375 376 377 378 379 380 381
static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
	file_accessed(file);
	vma->vm_ops = &f2fs_file_vm_ops;
	return 0;
}

382
int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
383 384
{
	int nr_free = 0, ofs = dn->ofs_in_node;
385
	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
386 387 388
	struct f2fs_node *raw_node;
	__le32 *addr;

389
	raw_node = F2FS_NODE(dn->node_page);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
390 391
	addr = blkaddr_in_node(raw_node) + ofs;

Chris Fries's avatar
Chris Fries committed
392
	for (; count > 0; count--, addr++, dn->ofs_in_node++) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
393 394 395 396 397 398 399 400 401
		block_t blkaddr = le32_to_cpu(*addr);
		if (blkaddr == NULL_ADDR)
			continue;

		update_extent_cache(NULL_ADDR, dn);
		invalidate_blocks(sbi, blkaddr);
		nr_free++;
	}
	if (nr_free) {
402
		dec_valid_block_count(sbi, dn->inode, nr_free);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
403 404 405 406
		set_page_dirty(dn->node_page);
		sync_inode_page(dn);
	}
	dn->ofs_in_node = ofs;
407 408 409

	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
					 dn->ofs_in_node, nr_free);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
410 411 412 413 414 415 416 417 418 419 420 421 422
	return nr_free;
}

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

static void truncate_partial_data_page(struct inode *inode, u64 from)
{
	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	struct page *page;

423 424 425
	if (f2fs_has_inline_data(inode))
		return truncate_inline_data(inode, from);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
426 427 428
	if (!offset)
		return;

429
	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
430 431 432 433
	if (IS_ERR(page))
		return;

	lock_page(page);
434 435 436 437
	if (unlikely(!PageUptodate(page) ||
			page->mapping != inode->i_mapping))
		goto out;

438
	f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
439 440
	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	set_page_dirty(page);
441 442

out:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
443 444 445
	f2fs_put_page(page, 1);
}

446
int truncate_blocks(struct inode *inode, u64 from, bool lock)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
447
{
448
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
449 450 451
	unsigned int blocksize = inode->i_sb->s_blocksize;
	struct dnode_of_data dn;
	pgoff_t free_from;
452
	int count = 0, err = 0;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
453

454 455
	trace_f2fs_truncate_blocks_enter(inode, from);

456 457 458
	if (f2fs_has_inline_data(inode))
		goto done;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
459 460 461
	free_from = (pgoff_t)
			((from + blocksize - 1) >> (sbi->log_blocksize));

462 463
	if (lock)
		f2fs_lock_op(sbi);
464

Jaegeuk Kim's avatar
Jaegeuk Kim committed
465
	set_new_dnode(&dn, inode, NULL, NULL, 0);
466
	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
467 468 469
	if (err) {
		if (err == -ENOENT)
			goto free_next;
470 471
		if (lock)
			f2fs_unlock_op(sbi);
472
		trace_f2fs_truncate_blocks_exit(inode, err);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
473 474 475
		return err;
	}

476
	count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
477 478

	count -= dn.ofs_in_node;
479
	f2fs_bug_on(sbi, count < 0);
480

Jaegeuk Kim's avatar
Jaegeuk Kim committed
481 482 483 484 485 486 487 488
	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);
489 490
	if (lock)
		f2fs_unlock_op(sbi);
491
done:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
492 493 494
	/* lastly zero out the first data page */
	truncate_partial_data_page(inode, from);

495
	trace_f2fs_truncate_blocks_exit(inode, err);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
496 497 498 499 500 501 502 503 504
	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;

505 506
	trace_f2fs_truncate(inode);

507
	if (!truncate_blocks(inode, i_size_read(inode), true)) {
Jaegeuk Kim's avatar
Jaegeuk Kim committed
508 509 510 511 512
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
}

513
int f2fs_getattr(struct vfsmount *mnt,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562
			 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;

563
	if (attr->ia_valid & ATTR_SIZE) {
564
		err = f2fs_convert_inline_data(inode, attr->ia_size, NULL);
565 566
		if (err)
			return err;
567

568 569 570 571 572 573 574 575 576 577 578
		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
579 580 581 582 583
	}

	__setattr_copy(inode, attr);

	if (attr->ia_valid & ATTR_MODE) {
584
		err = posix_acl_chmod(inode, get_inode_mode(inode));
Jaegeuk Kim's avatar
Jaegeuk Kim committed
585 586 587 588 589 590 591 592 593 594 595 596 597 598
		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,
599
	.set_acl	= f2fs_set_acl,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
600 601 602 603 604 605
#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
606
	.fiemap		= f2fs_fiemap,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
607 608 609 610 611
};

static void fill_zero(struct inode *inode, pgoff_t index,
					loff_t start, loff_t len)
{
612
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
613 614 615 616 617
	struct page *page;

	if (!len)
		return;

618 619
	f2fs_balance_fs(sbi);

620
	f2fs_lock_op(sbi);
621
	page = get_new_data_page(inode, NULL, index, false);
622
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
623 624

	if (!IS_ERR(page)) {
625
		f2fs_wait_on_page_writeback(page, DATA);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
626 627 628 629 630 631 632 633 634 635 636 637 638
		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;
639

Jaegeuk Kim's avatar
Jaegeuk Kim committed
640
		set_new_dnode(&dn, inode, NULL, NULL, 0);
641
		err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
642 643 644 645 646 647 648 649 650 651 652 653 654
		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;
}

655
static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
656 657 658 659 660
{
	pgoff_t pg_start, pg_end;
	loff_t off_start, off_end;
	int ret = 0;

661 662 663 664 665 666 667
	if (!S_ISREG(inode->i_mode))
		return -EOPNOTSUPP;

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

668
	ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL);
669 670
	if (ret)
		return ret;
671

Jaegeuk Kim's avatar
Jaegeuk Kim committed
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
	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;
691
			struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
692 693

			f2fs_balance_fs(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
694 695 696 697 698

			blk_start = pg_start << PAGE_CACHE_SHIFT;
			blk_end = pg_end << PAGE_CACHE_SHIFT;
			truncate_inode_pages_range(mapping, blk_start,
					blk_end - 1);
699

700
			f2fs_lock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
701
			ret = truncate_hole(inode, pg_start, pg_end);
702
			f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
703 704 705 706 707 708 709 710 711
		}
	}

	return ret;
}

static int expand_inode_data(struct inode *inode, loff_t offset,
					loff_t len, int mode)
{
712
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
713 714 715 716 717
	pgoff_t index, pg_start, pg_end;
	loff_t new_size = i_size_read(inode);
	loff_t off_start, off_end;
	int ret = 0;

718 719
	f2fs_balance_fs(sbi);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
720 721 722 723
	ret = inode_newsize_ok(inode, (len + offset));
	if (ret)
		return ret;

724
	ret = f2fs_convert_inline_data(inode, offset + len, NULL);
725 726 727
	if (ret)
		return ret;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
728 729 730 731 732 733
	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);

734 735
	f2fs_lock_op(sbi);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
736 737 738
	for (index = pg_start; index <= pg_end; index++) {
		struct dnode_of_data dn;

739 740 741
		if (index == pg_end && !off_end)
			goto noalloc;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
742
		set_new_dnode(&dn, inode, NULL, NULL, 0);
743 744
		ret = f2fs_reserve_block(&dn, index);
		if (ret)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
745
			break;
746
noalloc:
Jaegeuk Kim's avatar
Jaegeuk Kim committed
747 748 749 750 751 752 753 754 755 756 757 758 759 760
		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);
761
		update_inode_page(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
762
	}
763
	f2fs_unlock_op(sbi);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
764 765 766 767 768 769 770

	return ret;
}

static long f2fs_fallocate(struct file *file, int mode,
				loff_t offset, loff_t len)
{
771
	struct inode *inode = file_inode(file);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
772 773 774 775 776
	long ret;

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

777 778
	mutex_lock(&inode->i_mutex);

Jaegeuk Kim's avatar
Jaegeuk Kim committed
779
	if (mode & FALLOC_FL_PUNCH_HOLE)
780
		ret = punch_hole(inode, offset, len);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
781 782 783
	else
		ret = expand_inode_data(inode, offset, len, mode);

784 785 786 787
	if (!ret) {
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
788 789 790

	mutex_unlock(&inode->i_mutex);

791
	trace_f2fs_fallocate(inode, mode, offset, len, ret);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807
	return ret;
}

#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;
}

808
static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
Jaegeuk Kim's avatar
Jaegeuk Kim committed
809
{
810
	struct inode *inode = file_inode(filp);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
811
	struct f2fs_inode_info *fi = F2FS_I(inode);
812 813 814
	unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
	return put_user(flags, (int __user *)arg);
}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
815

816 817 818 819 820 821 822
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
823

824 825 826
	ret = mnt_want_write_file(filp);
	if (ret)
		return ret;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
827

828 829 830 831
	if (!inode_owner_or_capable(inode)) {
		ret = -EACCES;
		goto out;
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
832

833 834 835 836
	if (get_user(flags, (int __user *)arg)) {
		ret = -EFAULT;
		goto out;
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
837

838
	flags = f2fs_mask_flags(inode->i_mode, flags);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
839

840
	mutex_lock(&inode->i_mutex);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
841

842
	oldflags = fi->i_flags;
Jaegeuk Kim's avatar
Jaegeuk Kim committed
843

844 845 846 847 848
	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
849
		}
850
	}
Jaegeuk Kim's avatar
Jaegeuk Kim committed
851

852 853 854 855
	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
856

857 858 859
	f2fs_set_inode_flags(inode);
	inode->i_ctime = CURRENT_TIME;
	mark_inode_dirty(inode);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
860
out:
861 862 863
	mnt_drop_write_file(filp);
	return ret;
}
864

Jaegeuk Kim's avatar
Jaegeuk Kim committed
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
static int f2fs_ioc_start_atomic_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

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

	f2fs_balance_fs(sbi);

	set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);

	return f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL);
}

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;

888 889 890
	if (f2fs_is_volatile_file(inode))
		return 0;

Jaegeuk Kim's avatar
Jaegeuk Kim committed
891 892 893 894 895 896 897 898 899 900 901 902
	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);
	return ret;
}

903 904 905 906 907 908 909 910 911 912 913
static int f2fs_ioc_start_volatile_write(struct file *filp)
{
	struct inode *inode = file_inode(filp);

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

	set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
	return 0;
}

914 915 916 917 918 919 920
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;
921

922 923
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
924

925 926
	if (!blk_queue_discard(q))
		return -EOPNOTSUPP;
927

928 929 930
	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
				sizeof(range)))
		return -EFAULT;
931

932 933 934 935 936
	range.minlen = max((unsigned int)range.minlen,
				q->limits.discard_granularity);
	ret = f2fs_trim_fs(F2FS_SB(sb), &range);
	if (ret < 0)
		return ret;
937

938 939 940 941 942 943 944 945 946 947 948 949 950
	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);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
951 952 953 954
	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);
955 956
	case F2FS_IOC_START_VOLATILE_WRITE:
		return f2fs_ioc_start_volatile_write(filp);
957 958
	case FITRIM:
		return f2fs_ioc_fitrim(filp, arg);
Jaegeuk Kim's avatar
Jaegeuk Kim committed
959 960 961 962 963
	default:
		return -ENOTTY;
	}
}

964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980
#ifdef CONFIG_COMPAT
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	switch (cmd) {
	case F2FS_IOC32_GETFLAGS:
		cmd = F2FS_IOC_GETFLAGS;
		break;
	case F2FS_IOC32_SETFLAGS:
		cmd = F2FS_IOC_SETFLAGS;
		break;
	default:
		return -ENOIOCTLCMD;
	}
	return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
}
#endif

Jaegeuk Kim's avatar
Jaegeuk Kim committed
981
const struct file_operations f2fs_file_operations = {
982
	.llseek		= f2fs_llseek,
983
	.read		= new_sync_read,
984
	.write		= new_sync_write,
985
	.read_iter	= generic_file_read_iter,
986
	.write_iter	= generic_file_write_iter,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
987 988 989 990 991
	.open		= generic_file_open,
	.mmap		= f2fs_file_mmap,
	.fsync		= f2fs_sync_file,
	.fallocate	= f2fs_fallocate,
	.unlocked_ioctl	= f2fs_ioctl,
992 993 994
#ifdef CONFIG_COMPAT
	.compat_ioctl	= f2fs_compat_ioctl,
#endif
Jaegeuk Kim's avatar
Jaegeuk Kim committed
995
	.splice_read	= generic_file_splice_read,
Al Viro's avatar
Al Viro committed
996
	.splice_write	= iter_file_splice_write,
Jaegeuk Kim's avatar
Jaegeuk Kim committed
997
};