inode.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  linux/fs/ufs/inode.c
   4 *
   5 * Copyright (C) 1998
   6 * Daniel Pirkl <daniel.pirkl@email.cz>
   7 * Charles University, Faculty of Mathematics and Physics
   8 *
   9 *  from
  10 *
  11 *  linux/fs/ext2/inode.c
  12 *
  13 * Copyright (C) 1992, 1993, 1994, 1995
  14 * Remy Card (card@masi.ibp.fr)
  15 * Laboratoire MASI - Institut Blaise Pascal
  16 * Universite Pierre et Marie Curie (Paris VI)
  17 *
  18 *  from
  19 *
  20 *  linux/fs/minix/inode.c
  21 *
  22 *  Copyright (C) 1991, 1992  Linus Torvalds
  23 *
  24 *  Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  25 *  Big-endian to little-endian byte-swapping/bitmaps by
  26 *        David S. Miller (davem@caip.rutgers.edu), 1995
  27 */
  28
  29#include <linux/uaccess.h>
  30
  31#include <linux/errno.h>
  32#include <linux/fs.h>
  33#include <linux/time.h>
  34#include <linux/stat.h>
  35#include <linux/string.h>
  36#include <linux/mm.h>
  37#include <linux/buffer_head.h>
  38#include <linux/mpage.h>
  39#include <linux/writeback.h>
  40#include <linux/iversion.h>
  41
  42#include "ufs_fs.h"
  43#include "ufs.h"
  44#include "swab.h"
  45#include "util.h"
  46
  47static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
  48{
  49	struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
  50	int ptrs = uspi->s_apb;
  51	int ptrs_bits = uspi->s_apbshift;
  52	const long direct_blocks = UFS_NDADDR,
  53		indirect_blocks = ptrs,
  54		double_blocks = (1 << (ptrs_bits * 2));
  55	int n = 0;
  56
  57
  58	UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
  59	if (i_block < direct_blocks) {
  60		offsets[n++] = i_block;
  61	} else if ((i_block -= direct_blocks) < indirect_blocks) {
  62		offsets[n++] = UFS_IND_BLOCK;
  63		offsets[n++] = i_block;
  64	} else if ((i_block -= indirect_blocks) < double_blocks) {
  65		offsets[n++] = UFS_DIND_BLOCK;
  66		offsets[n++] = i_block >> ptrs_bits;
  67		offsets[n++] = i_block & (ptrs - 1);
  68	} else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  69		offsets[n++] = UFS_TIND_BLOCK;
  70		offsets[n++] = i_block >> (ptrs_bits * 2);
  71		offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  72		offsets[n++] = i_block & (ptrs - 1);
  73	} else {
  74		ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  75	}
  76	return n;
  77}
  78
  79typedef struct {
  80	void	*p;
  81	union {
  82		__fs32	key32;
  83		__fs64	key64;
  84	};
  85	struct buffer_head *bh;
  86} Indirect;
  87
  88static inline int grow_chain32(struct ufs_inode_info *ufsi,
  89			       struct buffer_head *bh, __fs32 *v,
  90			       Indirect *from, Indirect *to)
  91{
  92	Indirect *p;
  93	unsigned seq;
  94	to->bh = bh;
  95	do {
  96		seq = read_seqbegin(&ufsi->meta_lock);
  97		to->key32 = *(__fs32 *)(to->p = v);
  98		for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
  99			;
 100	} while (read_seqretry(&ufsi->meta_lock, seq));
 101	return (p > to);
 102}
 103
 104static inline int grow_chain64(struct ufs_inode_info *ufsi,
 105			       struct buffer_head *bh, __fs64 *v,
 106			       Indirect *from, Indirect *to)
 107{
 108	Indirect *p;
 109	unsigned seq;
 110	to->bh = bh;
 111	do {
 112		seq = read_seqbegin(&ufsi->meta_lock);
 113		to->key64 = *(__fs64 *)(to->p = v);
 114		for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
 115			;
 116	} while (read_seqretry(&ufsi->meta_lock, seq));
 117	return (p > to);
 118}
 119
 120/*
 121 * Returns the location of the fragment from
 122 * the beginning of the filesystem.
 123 */
 124
 125static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth)
 126{
 127	struct ufs_inode_info *ufsi = UFS_I(inode);
 128	struct super_block *sb = inode->i_sb;
 129	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 130	u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
 131	int shift = uspi->s_apbshift-uspi->s_fpbshift;
 132	Indirect chain[4], *q = chain;
 133	unsigned *p;
 134	unsigned flags = UFS_SB(sb)->s_flags;
 135	u64 res = 0;
 136
 137	UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
 138		uspi->s_fpbshift, uspi->s_apbmask,
 139		(unsigned long long)mask);
 140
 141	if (depth == 0)
 142		goto no_block;
 143
 144again:
 145	p = offsets;
 146
 147	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 148		goto ufs2;
 149
 150	if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
 151		goto changed;
 152	if (!q->key32)
 153		goto no_block;
 154	while (--depth) {
 155		__fs32 *ptr;
 156		struct buffer_head *bh;
 157		unsigned n = *p++;
 158
 159		bh = sb_bread(sb, uspi->s_sbbase +
 160				  fs32_to_cpu(sb, q->key32) + (n>>shift));
 161		if (!bh)
 162			goto no_block;
 163		ptr = (__fs32 *)bh->b_data + (n & mask);
 164		if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
 165			goto changed;
 166		if (!q->key32)
 167			goto no_block;
 168	}
 169	res = fs32_to_cpu(sb, q->key32);
 170	goto found;
 171
 172ufs2:
 173	if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
 174		goto changed;
 175	if (!q->key64)
 176		goto no_block;
 177
 178	while (--depth) {
 179		__fs64 *ptr;
 180		struct buffer_head *bh;
 181		unsigned n = *p++;
 182
 183		bh = sb_bread(sb, uspi->s_sbbase +
 184				  fs64_to_cpu(sb, q->key64) + (n>>shift));
 185		if (!bh)
 186			goto no_block;
 187		ptr = (__fs64 *)bh->b_data + (n & mask);
 188		if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
 189			goto changed;
 190		if (!q->key64)
 191			goto no_block;
 192	}
 193	res = fs64_to_cpu(sb, q->key64);
 194found:
 195	res += uspi->s_sbbase;
 196no_block:
 197	while (q > chain) {
 198		brelse(q->bh);
 199		q--;
 200	}
 201	return res;
 202
 203changed:
 204	while (q > chain) {
 205		brelse(q->bh);
 206		q--;
 207	}
 208	goto again;
 209}
 210
 211/*
 212 * Unpacking tails: we have a file with partial final block and
 213 * we had been asked to extend it.  If the fragment being written
 214 * is within the same block, we need to extend the tail just to cover
 215 * that fragment.  Otherwise the tail is extended to full block.
 216 *
 217 * Note that we might need to create a _new_ tail, but that will
 218 * be handled elsewhere; this is strictly for resizing old
 219 * ones.
 220 */
 221static bool
 222ufs_extend_tail(struct inode *inode, u64 writes_to,
 223		  int *err, struct folio *locked_folio)
 224{
 225	struct ufs_inode_info *ufsi = UFS_I(inode);
 226	struct super_block *sb = inode->i_sb;
 227	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 228	unsigned lastfrag = ufsi->i_lastfrag;	/* it's a short file, so unsigned is enough */
 229	unsigned block = ufs_fragstoblks(lastfrag);
 230	unsigned new_size;
 231	void *p;
 232	u64 tmp;
 233
 234	if (writes_to < (lastfrag | uspi->s_fpbmask))
 235		new_size = (writes_to & uspi->s_fpbmask) + 1;
 236	else
 237		new_size = uspi->s_fpb;
 238
 239	p = ufs_get_direct_data_ptr(uspi, ufsi, block);
 240	tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
 241				new_size - (lastfrag & uspi->s_fpbmask), err,
 242				locked_folio);
 243	return tmp != 0;
 244}
 245
 246/**
 247 * ufs_inode_getfrag() - allocate new fragment(s)
 248 * @inode: pointer to inode
 249 * @index: number of block pointer within the inode's array.
 250 * @new_fragment: number of new allocated fragment(s)
 251 * @err: we set it if something wrong
 252 * @new: we set it if we allocate new block
 253 * @locked_folio: for ufs_new_fragments()
 254 */
 255static u64 ufs_inode_getfrag(struct inode *inode, unsigned index,
 256		  sector_t new_fragment, int *err,
 257		  int *new, struct folio *locked_folio)
 258{
 259	struct ufs_inode_info *ufsi = UFS_I(inode);
 260	struct super_block *sb = inode->i_sb;
 261	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 262	u64 tmp, goal, lastfrag;
 263	unsigned nfrags = uspi->s_fpb;
 264	void *p;
 265
 266	p = ufs_get_direct_data_ptr(uspi, ufsi, index);
 267	tmp = ufs_data_ptr_to_cpu(sb, p);
 268	if (tmp)
 269		goto out;
 270
 271	lastfrag = ufsi->i_lastfrag;
 272
 273	/* will that be a new tail? */
 274	if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
 275		nfrags = (new_fragment & uspi->s_fpbmask) + 1;
 276
 277	goal = 0;
 278	if (index) {
 279		goal = ufs_data_ptr_to_cpu(sb,
 280				 ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
 281		if (goal)
 282			goal += uspi->s_fpb;
 283	}
 284	tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
 285				goal, nfrags, err, locked_folio);
 286
 287	if (!tmp) {
 288		*err = -ENOSPC;
 289		return 0;
 290	}
 291
 292	if (new)
 293		*new = 1;
 294	inode_set_ctime_current(inode);
 295	if (IS_SYNC(inode))
 296		ufs_sync_inode (inode);
 297	mark_inode_dirty(inode);
 298out:
 299	return tmp + uspi->s_sbbase;
 300}
 301
 302/**
 303 * ufs_inode_getblock() - allocate new block
 304 * @inode: pointer to inode
 305 * @ind_block: block number of the indirect block
 306 * @index: number of pointer within the indirect block
 307 * @new_fragment: number of new allocated fragment
 308 *  (block will hold this fragment and also uspi->s_fpb-1)
 309 * @err: see ufs_inode_getfrag()
 310 * @new: see ufs_inode_getfrag()
 311 * @locked_folio: see ufs_inode_getfrag()
 312 */
 313static u64 ufs_inode_getblock(struct inode *inode, u64 ind_block,
 314		unsigned index, sector_t new_fragment, int *err,
 315		int *new, struct folio *locked_folio)
 316{
 317	struct super_block *sb = inode->i_sb;
 318	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 319	int shift = uspi->s_apbshift - uspi->s_fpbshift;
 320	u64 tmp = 0, goal;
 321	struct buffer_head *bh;
 322	void *p;
 323
 324	if (!ind_block)
 325		return 0;
 326
 327	bh = sb_bread(sb, ind_block + (index >> shift));
 328	if (unlikely(!bh)) {
 329		*err = -EIO;
 330		return 0;
 331	}
 332
 333	index &= uspi->s_apbmask >> uspi->s_fpbshift;
 334	if (uspi->fs_magic == UFS2_MAGIC)
 335		p = (__fs64 *)bh->b_data + index;
 336	else
 337		p = (__fs32 *)bh->b_data + index;
 338
 339	tmp = ufs_data_ptr_to_cpu(sb, p);
 340	if (tmp)
 341		goto out;
 342
 343	if (index && (uspi->fs_magic == UFS2_MAGIC ?
 344		      (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
 345		      (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
 346		goal = tmp + uspi->s_fpb;
 347	else
 348		goal = bh->b_blocknr + uspi->s_fpb;
 349	tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
 350				uspi->s_fpb, err, locked_folio);
 351	if (!tmp)
 352		goto out;
 353
 354	if (new)
 355		*new = 1;
 356
 357	mark_buffer_dirty(bh);
 358	if (IS_SYNC(inode))
 359		sync_dirty_buffer(bh);
 360	inode_set_ctime_current(inode);
 361	mark_inode_dirty(inode);
 362out:
 363	brelse (bh);
 364	UFSD("EXIT\n");
 365	if (tmp)
 366		tmp += uspi->s_sbbase;
 367	return tmp;
 368}
 369
 370/**
 371 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and
 372 * read_folio, writepages and so on
 373 */
 374
 375static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 376{
 377	struct super_block *sb = inode->i_sb;
 378	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 379	int err = 0, new = 0;
 380	unsigned offsets[4];
 381	int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
 382	u64 phys64 = 0;
 383	unsigned frag = fragment & uspi->s_fpbmask;
 384
 385	phys64 = ufs_frag_map(inode, offsets, depth);
 386	if (!create)
 387		goto done;
 388
 389	if (phys64) {
 390		if (fragment >= UFS_NDIR_FRAGMENT)
 391			goto done;
 392		read_seqlock_excl(&UFS_I(inode)->meta_lock);
 393		if (fragment < UFS_I(inode)->i_lastfrag) {
 394			read_sequnlock_excl(&UFS_I(inode)->meta_lock);
 395			goto done;
 396		}
 397		read_sequnlock_excl(&UFS_I(inode)->meta_lock);
 398	}
 399        /* This code entered only while writing ....? */
 400
 401	mutex_lock(&UFS_I(inode)->truncate_mutex);
 402
 403	UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
 404	if (unlikely(!depth)) {
 405		ufs_warning(sb, "ufs_get_block", "block > big");
 406		err = -EIO;
 407		goto out;
 408	}
 409
 410	if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
 411		unsigned lastfrag = UFS_I(inode)->i_lastfrag;
 412		unsigned tailfrags = lastfrag & uspi->s_fpbmask;
 413		if (tailfrags && fragment >= lastfrag) {
 414			if (!ufs_extend_tail(inode, fragment,
 415					     &err, bh_result->b_folio))
 416				goto out;
 417		}
 418	}
 419
 420	if (depth == 1) {
 421		phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
 422					   &err, &new, bh_result->b_folio);
 423	} else {
 424		int i;
 425		phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
 426					   &err, NULL, NULL);
 427		for (i = 1; i < depth - 1; i++)
 428			phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
 429						fragment, &err, NULL, NULL);
 430		phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
 431				fragment, &err, &new, bh_result->b_folio);
 432	}
 433out:
 434	if (phys64) {
 435		phys64 += frag;
 436		map_bh(bh_result, sb, phys64);
 437		if (new)
 438			set_buffer_new(bh_result);
 439	}
 440	mutex_unlock(&UFS_I(inode)->truncate_mutex);
 441	return err;
 442
 443done:
 444	if (phys64)
 445		map_bh(bh_result, sb, phys64 + frag);
 446	return 0;
 447}
 448
 449static int ufs_writepages(struct address_space *mapping,
 450		struct writeback_control *wbc)
 451{
 452	return mpage_writepages(mapping, wbc, ufs_getfrag_block);
 453}
 454
 455static int ufs_read_folio(struct file *file, struct folio *folio)
 456{
 457	return block_read_full_folio(folio, ufs_getfrag_block);
 458}
 459
 460int ufs_prepare_chunk(struct folio *folio, loff_t pos, unsigned len)
 461{
 462	return __block_write_begin(folio, pos, len, ufs_getfrag_block);
 463}
 464
 465static void ufs_truncate_blocks(struct inode *);
 466
 467static void ufs_write_failed(struct address_space *mapping, loff_t to)
 468{
 469	struct inode *inode = mapping->host;
 470
 471	if (to > inode->i_size) {
 472		truncate_pagecache(inode, inode->i_size);
 473		ufs_truncate_blocks(inode);
 474	}
 475}
 476
 477static int ufs_write_begin(const struct kiocb *iocb,
 478			   struct address_space *mapping,
 479			   loff_t pos, unsigned len,
 480			   struct folio **foliop, void **fsdata)
 481{
 482	int ret;
 483
 484	ret = block_write_begin(mapping, pos, len, foliop, ufs_getfrag_block);
 485	if (unlikely(ret))
 486		ufs_write_failed(mapping, pos + len);
 487
 488	return ret;
 489}
 490
 491static int ufs_write_end(const struct kiocb *iocb,
 492			 struct address_space *mapping,
 493			 loff_t pos, unsigned len, unsigned copied,
 494			 struct folio *folio, void *fsdata)
 495{
 496	int ret;
 497
 498	ret = generic_write_end(iocb, mapping, pos, len, copied, folio, fsdata);
 499	if (ret < len)
 500		ufs_write_failed(mapping, pos + len);
 501	return ret;
 502}
 503
 504static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 505{
 506	return generic_block_bmap(mapping,block,ufs_getfrag_block);
 507}
 508
 509const struct address_space_operations ufs_aops = {
 510	.dirty_folio = block_dirty_folio,
 511	.invalidate_folio = block_invalidate_folio,
 512	.read_folio = ufs_read_folio,
 513	.writepages = ufs_writepages,
 514	.write_begin = ufs_write_begin,
 515	.write_end = ufs_write_end,
 516	.migrate_folio = buffer_migrate_folio,
 517	.bmap = ufs_bmap
 518};
 519
 520static void ufs_set_inode_ops(struct inode *inode)
 521{
 522	if (S_ISREG(inode->i_mode)) {
 523		inode->i_op = &ufs_file_inode_operations;
 524		inode->i_fop = &ufs_file_operations;
 525		inode->i_mapping->a_ops = &ufs_aops;
 526	} else if (S_ISDIR(inode->i_mode)) {
 527		inode->i_op = &ufs_dir_inode_operations;
 528		inode->i_fop = &ufs_dir_operations;
 529		inode->i_mapping->a_ops = &ufs_aops;
 530	} else if (S_ISLNK(inode->i_mode)) {
 531		if (!inode->i_blocks) {
 532			inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
 533			inode->i_op = &simple_symlink_inode_operations;
 534		} else {
 535			inode->i_mapping->a_ops = &ufs_aops;
 536			inode->i_op = &page_symlink_inode_operations;
 537			inode_nohighmem(inode);
 538		}
 539	} else
 540		init_special_inode(inode, inode->i_mode,
 541				   ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
 542}
 543
 544static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 545{
 546	struct ufs_inode_info *ufsi = UFS_I(inode);
 547	struct super_block *sb = inode->i_sb;
 548	umode_t mode;
 549
 550	/*
 551	 * Copy data to the in-core inode.
 552	 */
 553	inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 554	set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
 555	if (inode->i_nlink == 0)
 556		return -ESTALE;
 557
 558	/*
 559	 * Linux now has 32-bit uid and gid, so we can support EFT.
 560	 */
 561	i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
 562	i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
 563
 564	inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 565	inode_set_atime(inode,
 566			(signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec),
 567			0);
 568	inode_set_ctime(inode,
 569			(signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec),
 570			0);
 571	inode_set_mtime(inode,
 572			(signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec),
 573			0);
 574	inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 575	inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
 576	ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 577	ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 578	ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 579
 580
 581	if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 582		memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
 583		       sizeof(ufs_inode->ui_u2.ui_addr));
 584	} else {
 585		memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
 586		       sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
 587		ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
 588	}
 589	return 0;
 590}
 591
 592static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
 593{
 594	struct ufs_inode_info *ufsi = UFS_I(inode);
 595	struct super_block *sb = inode->i_sb;
 596	umode_t mode;
 597
 598	UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
 599	/*
 600	 * Copy data to the in-core inode.
 601	 */
 602	inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 603	set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
 604	if (inode->i_nlink == 0)
 605		return -ESTALE;
 606
 607        /*
 608         * Linux now has 32-bit uid and gid, so we can support EFT.
 609         */
 610	i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
 611	i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
 612
 613	inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 614	inode_set_atime(inode, fs64_to_cpu(sb, ufs2_inode->ui_atime),
 615			fs32_to_cpu(sb, ufs2_inode->ui_atimensec));
 616	inode_set_ctime(inode, fs64_to_cpu(sb, ufs2_inode->ui_ctime),
 617			fs32_to_cpu(sb, ufs2_inode->ui_ctimensec));
 618	inode_set_mtime(inode, fs64_to_cpu(sb, ufs2_inode->ui_mtime),
 619			fs32_to_cpu(sb, ufs2_inode->ui_mtimensec));
 620	inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 621	inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 622	ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 623	/*
 624	ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 625	ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 626	*/
 627
 628	if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 629		memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
 630		       sizeof(ufs2_inode->ui_u2.ui_addr));
 631	} else {
 632		memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
 633		       sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
 634		ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
 635	}
 636	return 0;
 637}
 638
 639struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
 640{
 641	struct ufs_inode_info *ufsi;
 642	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 643	struct buffer_head * bh;
 644	struct inode *inode;
 645	int err = -EIO;
 646
 647	UFSD("ENTER, ino %lu\n", ino);
 648
 649	if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
 650		ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
 651			    ino);
 652		return ERR_PTR(-EIO);
 653	}
 654
 655	inode = iget_locked(sb, ino);
 656	if (!inode)
 657		return ERR_PTR(-ENOMEM);
 658	if (!(inode_state_read_once(inode) & I_NEW))
 659		return inode;
 660
 661	ufsi = UFS_I(inode);
 662
 663	bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 664	if (!bh) {
 665		ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
 666			    inode->i_ino);
 667		goto bad_inode;
 668	}
 669	if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 670		struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 671
 672		err = ufs2_read_inode(inode,
 673				      ufs2_inode + ufs_inotofsbo(inode->i_ino));
 674	} else {
 675		struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
 676
 677		err = ufs1_read_inode(inode,
 678				      ufs_inode + ufs_inotofsbo(inode->i_ino));
 679	}
 680	brelse(bh);
 681	if (err)
 682		goto bad_inode;
 683
 684	inode_inc_iversion(inode);
 685	ufsi->i_lastfrag =
 686		(inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 687	ufsi->i_dir_start_lookup = 0;
 688	ufsi->i_osync = 0;
 689
 690	ufs_set_inode_ops(inode);
 691
 692	UFSD("EXIT\n");
 693	unlock_new_inode(inode);
 694	return inode;
 695
 696bad_inode:
 697	iget_failed(inode);
 698	return ERR_PTR(err);
 699}
 700
 701static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 702{
 703	struct super_block *sb = inode->i_sb;
 704 	struct ufs_inode_info *ufsi = UFS_I(inode);
 705
 706	ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 707	ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 708
 709	ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
 710	ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
 711
 712	ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 713	ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb,
 714						 inode_get_atime_sec(inode));
 715	ufs_inode->ui_atime.tv_usec = 0;
 716	ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb,
 717						 inode_get_ctime_sec(inode));
 718	ufs_inode->ui_ctime.tv_usec = 0;
 719	ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb,
 720						 inode_get_mtime_sec(inode));
 721	ufs_inode->ui_mtime.tv_usec = 0;
 722	ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 723	ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 724	ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 725
 726	if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
 727		ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 728		ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 729	}
 730
 731	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 732		/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 733		ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 734	} else if (inode->i_blocks) {
 735		memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
 736		       sizeof(ufs_inode->ui_u2.ui_addr));
 737	}
 738	else {
 739		memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 740		       sizeof(ufs_inode->ui_u2.ui_symlink));
 741	}
 742
 743	if (!inode->i_nlink)
 744		memset (ufs_inode, 0, sizeof(struct ufs_inode));
 745}
 746
 747static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
 748{
 749	struct super_block *sb = inode->i_sb;
 750 	struct ufs_inode_info *ufsi = UFS_I(inode);
 751
 752	UFSD("ENTER\n");
 753	ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 754	ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 755
 756	ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
 757	ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
 758
 759	ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 760	ufs_inode->ui_atime = cpu_to_fs64(sb, inode_get_atime_sec(inode));
 761	ufs_inode->ui_atimensec = cpu_to_fs32(sb,
 762					      inode_get_atime_nsec(inode));
 763	ufs_inode->ui_ctime = cpu_to_fs64(sb, inode_get_ctime_sec(inode));
 764	ufs_inode->ui_ctimensec = cpu_to_fs32(sb,
 765					      inode_get_ctime_nsec(inode));
 766	ufs_inode->ui_mtime = cpu_to_fs64(sb, inode_get_mtime_sec(inode));
 767	ufs_inode->ui_mtimensec = cpu_to_fs32(sb,
 768					      inode_get_mtime_nsec(inode));
 769
 770	ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
 771	ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 772	ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 773
 774	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 775		/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 776		ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
 777	} else if (inode->i_blocks) {
 778		memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
 779		       sizeof(ufs_inode->ui_u2.ui_addr));
 780	} else {
 781		memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 782		       sizeof(ufs_inode->ui_u2.ui_symlink));
 783 	}
 784
 785	if (!inode->i_nlink)
 786		memset (ufs_inode, 0, sizeof(struct ufs2_inode));
 787	UFSD("EXIT\n");
 788}
 789
 790static int ufs_update_inode(struct inode * inode, int do_sync)
 791{
 792	struct super_block *sb = inode->i_sb;
 793	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 794	struct buffer_head * bh;
 795
 796	UFSD("ENTER, ino %lu\n", inode->i_ino);
 797
 798	if (inode->i_ino < UFS_ROOTINO ||
 799	    inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 800		ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 801		return -1;
 802	}
 803
 804	bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 805	if (!bh) {
 806		ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 807		return -1;
 808	}
 809	if (uspi->fs_magic == UFS2_MAGIC) {
 810		struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 811
 812		ufs2_update_inode(inode,
 813				  ufs2_inode + ufs_inotofsbo(inode->i_ino));
 814	} else {
 815		struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
 816
 817		ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
 818	}
 819
 820	mark_buffer_dirty(bh);
 821	if (do_sync)
 822		sync_dirty_buffer(bh);
 823	brelse (bh);
 824
 825	UFSD("EXIT\n");
 826	return 0;
 827}
 828
 829int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
 830{
 831	return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
 832}
 833
 834int ufs_sync_inode (struct inode *inode)
 835{
 836	return ufs_update_inode (inode, 1);
 837}
 838
 839void ufs_evict_inode(struct inode * inode)
 840{
 841	int want_delete = 0;
 842
 843	if (!inode->i_nlink && !is_bad_inode(inode))
 844		want_delete = 1;
 845
 846	truncate_inode_pages_final(&inode->i_data);
 847	if (want_delete) {
 848		inode->i_size = 0;
 849		if (inode->i_blocks &&
 850		    (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 851		     S_ISLNK(inode->i_mode)))
 852			ufs_truncate_blocks(inode);
 853		ufs_update_inode(inode, inode_needs_sync(inode));
 854	}
 855
 856	invalidate_inode_buffers(inode);
 857	clear_inode(inode);
 858
 859	if (want_delete)
 860		ufs_free_inode(inode);
 861}
 862
 863struct to_free {
 864	struct inode *inode;
 865	u64 to;
 866	unsigned count;
 867};
 868
 869static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
 870{
 871	if (ctx->count && ctx->to != from) {
 872		ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
 873		ctx->count = 0;
 874	}
 875	ctx->count += count;
 876	ctx->to = from + count;
 877}
 878
 879#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
 880
 881/*
 882 * used only for truncation down to direct blocks.
 883 */
 884static void ufs_trunc_direct(struct inode *inode)
 885{
 886	struct ufs_inode_info *ufsi = UFS_I(inode);
 887	struct super_block *sb = inode->i_sb;
 888	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 889	unsigned int new_frags, old_frags;
 890	unsigned int old_slot, new_slot;
 891	unsigned int old_tail, new_tail;
 892	struct to_free ctx = {.inode = inode};
 893
 894	UFSD("ENTER: ino %lu\n", inode->i_ino);
 895
 896	new_frags = DIRECT_FRAGMENT;
 897	// new_frags = first fragment past the new EOF
 898	old_frags = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
 899	// old_frags = first fragment past the old EOF or covered by indirects
 900
 901	if (new_frags >= old_frags)	 // expanding - nothing to free
 902		goto done;
 903
 904	old_tail = ufs_fragnum(old_frags);
 905	old_slot = ufs_fragstoblks(old_frags);
 906	new_tail = ufs_fragnum(new_frags);
 907	new_slot = ufs_fragstoblks(new_frags);
 908
 909	if (old_slot == new_slot) { // old_tail > 0
 910		void *p = ufs_get_direct_data_ptr(uspi, ufsi, old_slot);
 911		u64 tmp = ufs_data_ptr_to_cpu(sb, p);
 912		if (!tmp)
 913			ufs_panic(sb, __func__, "internal error");
 914		if (!new_tail) {
 915			write_seqlock(&ufsi->meta_lock);
 916			ufs_data_ptr_clear(uspi, p);
 917			write_sequnlock(&ufsi->meta_lock);
 918		}
 919		ufs_free_fragments(inode, tmp + new_tail, old_tail - new_tail);
 920	} else {
 921		unsigned int slot = new_slot;
 922
 923		if (new_tail) {
 924			void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++);
 925			u64 tmp = ufs_data_ptr_to_cpu(sb, p);
 926			if (!tmp)
 927				ufs_panic(sb, __func__, "internal error");
 928
 929			ufs_free_fragments(inode, tmp + new_tail,
 930						uspi->s_fpb - new_tail);
 931		}
 932		while (slot < old_slot) {
 933			void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot++);
 934			u64 tmp = ufs_data_ptr_to_cpu(sb, p);
 935			if (!tmp)
 936				continue;
 937			write_seqlock(&ufsi->meta_lock);
 938			ufs_data_ptr_clear(uspi, p);
 939			write_sequnlock(&ufsi->meta_lock);
 940
 941			free_data(&ctx, tmp, uspi->s_fpb);
 942		}
 943
 944		free_data(&ctx, 0, 0);
 945
 946		if (old_tail) {
 947			void *p = ufs_get_direct_data_ptr(uspi, ufsi, slot);
 948			u64 tmp = ufs_data_ptr_to_cpu(sb, p);
 949			if (!tmp)
 950				ufs_panic(sb, __func__, "internal error");
 951			write_seqlock(&ufsi->meta_lock);
 952			ufs_data_ptr_clear(uspi, p);
 953			write_sequnlock(&ufsi->meta_lock);
 954
 955			ufs_free_fragments(inode, tmp, old_tail);
 956		}
 957	}
 958done:
 959	UFSD("EXIT: ino %lu\n", inode->i_ino);
 960}
 961
 962static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
 963{
 964	struct super_block *sb = inode->i_sb;
 965	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 966	struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
 967	unsigned i;
 968
 969	if (!ubh)
 970		return;
 971
 972	if (--depth) {
 973		for (i = 0; i < uspi->s_apb; i++) {
 974			void *p = ubh_get_data_ptr(uspi, ubh, i);
 975			u64 block = ufs_data_ptr_to_cpu(sb, p);
 976			if (block)
 977				free_full_branch(inode, block, depth);
 978		}
 979	} else {
 980		struct to_free ctx = {.inode = inode};
 981
 982		for (i = 0; i < uspi->s_apb; i++) {
 983			void *p = ubh_get_data_ptr(uspi, ubh, i);
 984			u64 block = ufs_data_ptr_to_cpu(sb, p);
 985			if (block)
 986				free_data(&ctx, block, uspi->s_fpb);
 987		}
 988		free_data(&ctx, 0, 0);
 989	}
 990
 991	ubh_bforget(ubh);
 992	ufs_free_blocks(inode, ind_block, uspi->s_fpb);
 993}
 994
 995static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
 996{
 997	struct super_block *sb = inode->i_sb;
 998	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 999	unsigned i;
1000
1001	if (--depth) {
1002		for (i = from; i < uspi->s_apb ; i++) {
1003			void *p = ubh_get_data_ptr(uspi, ubh, i);
1004			u64 block = ufs_data_ptr_to_cpu(sb, p);
1005			if (block) {
1006				write_seqlock(&UFS_I(inode)->meta_lock);
1007				ufs_data_ptr_clear(uspi, p);
1008				write_sequnlock(&UFS_I(inode)->meta_lock);
1009				ubh_mark_buffer_dirty(ubh);
1010				free_full_branch(inode, block, depth);
1011			}
1012		}
1013	} else {
1014		struct to_free ctx = {.inode = inode};
1015
1016		for (i = from; i < uspi->s_apb; i++) {
1017			void *p = ubh_get_data_ptr(uspi, ubh, i);
1018			u64 block = ufs_data_ptr_to_cpu(sb, p);
1019			if (block) {
1020				write_seqlock(&UFS_I(inode)->meta_lock);
1021				ufs_data_ptr_clear(uspi, p);
1022				write_sequnlock(&UFS_I(inode)->meta_lock);
1023				ubh_mark_buffer_dirty(ubh);
1024				free_data(&ctx, block, uspi->s_fpb);
1025			}
1026		}
1027		free_data(&ctx, 0, 0);
1028	}
1029	if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
1030		ubh_sync_block(ubh);
1031	ubh_brelse(ubh);
1032}
1033
1034static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
1035{
1036	int err = 0;
1037	struct super_block *sb = inode->i_sb;
1038	struct address_space *mapping = inode->i_mapping;
1039	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1040	unsigned i, end;
1041	sector_t lastfrag;
1042	struct folio *folio;
1043	struct buffer_head *bh;
1044	u64 phys64;
1045
1046	lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
1047
1048	if (!lastfrag)
1049		goto out;
1050
1051	lastfrag--;
1052
1053	folio = ufs_get_locked_folio(mapping, lastfrag >>
1054				       (PAGE_SHIFT - inode->i_blkbits));
1055	if (IS_ERR(folio)) {
1056		err = -EIO;
1057		goto out;
1058	}
1059
1060	end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1);
1061	bh = folio_buffers(folio);
1062	for (i = 0; i < end; ++i)
1063		bh = bh->b_this_page;
1064
1065       err = ufs_getfrag_block(inode, lastfrag, bh, 1);
1066
1067       if (unlikely(err))
1068	       goto out_unlock;
1069
1070       if (buffer_new(bh)) {
1071	       clear_buffer_new(bh);
1072	       clean_bdev_bh_alias(bh);
1073	       /*
1074		* we do not zeroize fragment, because of
1075		* if it maped to hole, it already contains zeroes
1076		*/
1077	       set_buffer_uptodate(bh);
1078	       mark_buffer_dirty(bh);
1079		folio_mark_dirty(folio);
1080       }
1081
1082       if (lastfrag >= UFS_IND_FRAGMENT) {
1083	       end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
1084	       phys64 = bh->b_blocknr + 1;
1085	       for (i = 0; i < end; ++i) {
1086		       bh = sb_getblk(sb, i + phys64);
1087		       lock_buffer(bh);
1088		       memset(bh->b_data, 0, sb->s_blocksize);
1089		       set_buffer_uptodate(bh);
1090		       mark_buffer_dirty(bh);
1091		       unlock_buffer(bh);
1092		       sync_dirty_buffer(bh);
1093		       brelse(bh);
1094	       }
1095       }
1096out_unlock:
1097       ufs_put_locked_folio(folio);
1098out:
1099       return err;
1100}
1101
1102static void ufs_truncate_blocks(struct inode *inode)
1103{
1104	struct ufs_inode_info *ufsi = UFS_I(inode);
1105	struct super_block *sb = inode->i_sb;
1106	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
1107	unsigned offsets[4];
1108	int depth;
1109	int depth2;
1110	unsigned i;
1111	struct ufs_buffer_head *ubh[3];
1112	void *p;
1113	u64 block;
1114
1115	if (inode->i_size) {
1116		sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
1117		depth = ufs_block_to_path(inode, last, offsets);
1118		if (!depth)
1119			return;
1120	} else {
1121		depth = 1;
1122	}
1123
1124	for (depth2 = depth - 1; depth2; depth2--)
1125		if (offsets[depth2] != uspi->s_apb - 1)
1126			break;
1127
1128	mutex_lock(&ufsi->truncate_mutex);
1129	if (depth == 1) {
1130		ufs_trunc_direct(inode);
1131		offsets[0] = UFS_IND_BLOCK;
1132	} else {
1133		/* get the blocks that should be partially emptied */
1134		p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
1135		for (i = 0; i < depth2; i++) {
1136			block = ufs_data_ptr_to_cpu(sb, p);
1137			if (!block)
1138				break;
1139			ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
1140			if (!ubh[i]) {
1141				write_seqlock(&ufsi->meta_lock);
1142				ufs_data_ptr_clear(uspi, p);
1143				write_sequnlock(&ufsi->meta_lock);
1144				break;
1145			}
1146			p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
1147		}
1148		while (i--)
1149			free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
1150	}
1151	for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
1152		p = ufs_get_direct_data_ptr(uspi, ufsi, i);
1153		block = ufs_data_ptr_to_cpu(sb, p);
1154		if (block) {
1155			write_seqlock(&ufsi->meta_lock);
1156			ufs_data_ptr_clear(uspi, p);
1157			write_sequnlock(&ufsi->meta_lock);
1158			free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
1159		}
1160	}
1161	read_seqlock_excl(&ufsi->meta_lock);
1162	ufsi->i_lastfrag = DIRECT_FRAGMENT;
1163	read_sequnlock_excl(&ufsi->meta_lock);
1164	mark_inode_dirty(inode);
1165	mutex_unlock(&ufsi->truncate_mutex);
1166}
1167
1168static int ufs_truncate(struct inode *inode, loff_t size)
1169{
1170	int err = 0;
1171
1172	UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
1173	     inode->i_ino, (unsigned long long)size,
1174	     (unsigned long long)i_size_read(inode));
1175
1176	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
1177	      S_ISLNK(inode->i_mode)))
1178		return -EINVAL;
1179	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
1180		return -EPERM;
1181
1182	err = ufs_alloc_lastblock(inode, size);
1183
1184	if (err)
1185		goto out;
1186
1187	block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
1188
1189	truncate_setsize(inode, size);
1190
1191	ufs_truncate_blocks(inode);
1192	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
1193	mark_inode_dirty(inode);
1194out:
1195	UFSD("EXIT: err %d\n", err);
1196	return err;
1197}
1198
1199int ufs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
1200		struct iattr *attr)
1201{
1202	struct inode *inode = d_inode(dentry);
1203	unsigned int ia_valid = attr->ia_valid;
1204	int error;
1205
1206	error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
1207	if (error)
1208		return error;
1209
1210	if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
1211		error = ufs_truncate(inode, attr->ia_size);
1212		if (error)
1213			return error;
1214	}
1215
1216	setattr_copy(&nop_mnt_idmap, inode, attr);
1217	mark_inode_dirty(inode);
1218	return 0;
1219}
1220
1221const struct inode_operations ufs_file_inode_operations = {
1222	.setattr = ufs_setattr,
1223};