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/linux-2.6.33/kernel/linux-2.6.33/fs/gfs2/ops_inode.c

https://bitbucket.org/microcreat/cortexm_uclinux
C | 1440 lines | 1020 code | 226 blank | 194 comment | 224 complexity | daa58cc525de02510eef5d1538a0919d MD5 | raw file
   1/*
   2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   4 *
   5 * This copyrighted material is made available to anyone wishing to use,
   6 * modify, copy, or redistribute it subject to the terms and conditions
   7 * of the GNU General Public License version 2.
   8 */
   9
  10#include <linux/slab.h>
  11#include <linux/spinlock.h>
  12#include <linux/completion.h>
  13#include <linux/buffer_head.h>
  14#include <linux/namei.h>
  15#include <linux/mm.h>
  16#include <linux/xattr.h>
  17#include <linux/posix_acl.h>
  18#include <linux/gfs2_ondisk.h>
  19#include <linux/crc32.h>
  20#include <linux/fiemap.h>
  21#include <asm/uaccess.h>
  22
  23#include "gfs2.h"
  24#include "incore.h"
  25#include "acl.h"
  26#include "bmap.h"
  27#include "dir.h"
  28#include "xattr.h"
  29#include "glock.h"
  30#include "inode.h"
  31#include "meta_io.h"
  32#include "quota.h"
  33#include "rgrp.h"
  34#include "trans.h"
  35#include "util.h"
  36#include "super.h"
  37
  38/**
  39 * gfs2_create - Create a file
  40 * @dir: The directory in which to create the file
  41 * @dentry: The dentry of the new file
  42 * @mode: The mode of the new file
  43 *
  44 * Returns: errno
  45 */
  46
  47static int gfs2_create(struct inode *dir, struct dentry *dentry,
  48		       int mode, struct nameidata *nd)
  49{
  50	struct gfs2_inode *dip = GFS2_I(dir);
  51	struct gfs2_sbd *sdp = GFS2_SB(dir);
  52	struct gfs2_holder ghs[2];
  53	struct inode *inode;
  54
  55	gfs2_holder_init(dip->i_gl, 0, 0, ghs);
  56
  57	for (;;) {
  58		inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0);
  59		if (!IS_ERR(inode)) {
  60			gfs2_trans_end(sdp);
  61			if (dip->i_alloc->al_rgd)
  62				gfs2_inplace_release(dip);
  63			gfs2_quota_unlock(dip);
  64			gfs2_alloc_put(dip);
  65			gfs2_glock_dq_uninit_m(2, ghs);
  66			mark_inode_dirty(inode);
  67			break;
  68		} else if (PTR_ERR(inode) != -EEXIST ||
  69			   (nd && nd->flags & LOOKUP_EXCL)) {
  70			gfs2_holder_uninit(ghs);
  71			return PTR_ERR(inode);
  72		}
  73
  74		inode = gfs2_lookupi(dir, &dentry->d_name, 0);
  75		if (inode) {
  76			if (!IS_ERR(inode)) {
  77				gfs2_holder_uninit(ghs);
  78				break;
  79			} else {
  80				gfs2_holder_uninit(ghs);
  81				return PTR_ERR(inode);
  82			}
  83		}
  84	}
  85
  86	d_instantiate(dentry, inode);
  87
  88	return 0;
  89}
  90
  91/**
  92 * gfs2_lookup - Look up a filename in a directory and return its inode
  93 * @dir: The directory inode
  94 * @dentry: The dentry of the new inode
  95 * @nd: passed from Linux VFS, ignored by us
  96 *
  97 * Called by the VFS layer. Lock dir and call gfs2_lookupi()
  98 *
  99 * Returns: errno
 100 */
 101
 102static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
 103				  struct nameidata *nd)
 104{
 105	struct inode *inode = NULL;
 106
 107	dentry->d_op = &gfs2_dops;
 108
 109	inode = gfs2_lookupi(dir, &dentry->d_name, 0);
 110	if (inode && IS_ERR(inode))
 111		return ERR_CAST(inode);
 112
 113	if (inode) {
 114		struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
 115		struct gfs2_holder gh;
 116		int error;
 117		error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
 118		if (error) {
 119			iput(inode);
 120			return ERR_PTR(error);
 121		}
 122		gfs2_glock_dq_uninit(&gh);
 123		return d_splice_alias(inode, dentry);
 124	}
 125	d_add(dentry, inode);
 126
 127	return NULL;
 128}
 129
 130/**
 131 * gfs2_link - Link to a file
 132 * @old_dentry: The inode to link
 133 * @dir: Add link to this directory
 134 * @dentry: The name of the link
 135 *
 136 * Link the inode in "old_dentry" into the directory "dir" with the
 137 * name in "dentry".
 138 *
 139 * Returns: errno
 140 */
 141
 142static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 143		     struct dentry *dentry)
 144{
 145	struct gfs2_inode *dip = GFS2_I(dir);
 146	struct gfs2_sbd *sdp = GFS2_SB(dir);
 147	struct inode *inode = old_dentry->d_inode;
 148	struct gfs2_inode *ip = GFS2_I(inode);
 149	struct gfs2_holder ghs[2];
 150	int alloc_required;
 151	int error;
 152
 153	if (S_ISDIR(inode->i_mode))
 154		return -EPERM;
 155
 156	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
 157	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
 158
 159	error = gfs2_glock_nq(ghs); /* parent */
 160	if (error)
 161		goto out_parent;
 162
 163	error = gfs2_glock_nq(ghs + 1); /* child */
 164	if (error)
 165		goto out_child;
 166
 167	error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
 168	if (error)
 169		goto out_gunlock;
 170
 171	error = gfs2_dir_check(dir, &dentry->d_name, NULL);
 172	switch (error) {
 173	case -ENOENT:
 174		break;
 175	case 0:
 176		error = -EEXIST;
 177	default:
 178		goto out_gunlock;
 179	}
 180
 181	error = -EINVAL;
 182	if (!dip->i_inode.i_nlink)
 183		goto out_gunlock;
 184	error = -EFBIG;
 185	if (dip->i_entries == (u32)-1)
 186		goto out_gunlock;
 187	error = -EPERM;
 188	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 189		goto out_gunlock;
 190	error = -EINVAL;
 191	if (!ip->i_inode.i_nlink)
 192		goto out_gunlock;
 193	error = -EMLINK;
 194	if (ip->i_inode.i_nlink == (u32)-1)
 195		goto out_gunlock;
 196
 197	alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
 198	if (error < 0)
 199		goto out_gunlock;
 200	error = 0;
 201
 202	if (alloc_required) {
 203		struct gfs2_alloc *al = gfs2_alloc_get(dip);
 204		if (!al) {
 205			error = -ENOMEM;
 206			goto out_gunlock;
 207		}
 208
 209		error = gfs2_quota_lock_check(dip);
 210		if (error)
 211			goto out_alloc;
 212
 213		al->al_requested = sdp->sd_max_dirres;
 214
 215		error = gfs2_inplace_reserve(dip);
 216		if (error)
 217			goto out_gunlock_q;
 218
 219		error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
 220					 al->al_rgd->rd_length +
 221					 2 * RES_DINODE + RES_STATFS +
 222					 RES_QUOTA, 0);
 223		if (error)
 224			goto out_ipres;
 225	} else {
 226		error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
 227		if (error)
 228			goto out_ipres;
 229	}
 230
 231	error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode));
 232	if (error)
 233		goto out_end_trans;
 234
 235	error = gfs2_change_nlink(ip, +1);
 236
 237out_end_trans:
 238	gfs2_trans_end(sdp);
 239out_ipres:
 240	if (alloc_required)
 241		gfs2_inplace_release(dip);
 242out_gunlock_q:
 243	if (alloc_required)
 244		gfs2_quota_unlock(dip);
 245out_alloc:
 246	if (alloc_required)
 247		gfs2_alloc_put(dip);
 248out_gunlock:
 249	gfs2_glock_dq(ghs + 1);
 250out_child:
 251	gfs2_glock_dq(ghs);
 252out_parent:
 253	gfs2_holder_uninit(ghs);
 254	gfs2_holder_uninit(ghs + 1);
 255	if (!error) {
 256		atomic_inc(&inode->i_count);
 257		d_instantiate(dentry, inode);
 258		mark_inode_dirty(inode);
 259	}
 260	return error;
 261}
 262
 263/*
 264 * gfs2_unlink_ok - check to see that a inode is still in a directory
 265 * @dip: the directory
 266 * @name: the name of the file
 267 * @ip: the inode
 268 *
 269 * Assumes that the lock on (at least) @dip is held.
 270 *
 271 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
 272 */
 273
 274static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
 275			  const struct gfs2_inode *ip)
 276{
 277	int error;
 278
 279	if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
 280		return -EPERM;
 281
 282	if ((dip->i_inode.i_mode & S_ISVTX) &&
 283	    dip->i_inode.i_uid != current_fsuid() &&
 284	    ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER))
 285		return -EPERM;
 286
 287	if (IS_APPEND(&dip->i_inode))
 288		return -EPERM;
 289
 290	error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
 291	if (error)
 292		return error;
 293
 294	error = gfs2_dir_check(&dip->i_inode, name, ip);
 295	if (error)
 296		return error;
 297
 298	return 0;
 299}
 300
 301/**
 302 * gfs2_unlink - Unlink a file
 303 * @dir: The inode of the directory containing the file to unlink
 304 * @dentry: The file itself
 305 *
 306 * Unlink a file.  Call gfs2_unlinki()
 307 *
 308 * Returns: errno
 309 */
 310
 311static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 312{
 313	struct gfs2_inode *dip = GFS2_I(dir);
 314	struct gfs2_sbd *sdp = GFS2_SB(dir);
 315	struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 316	struct gfs2_holder ghs[3];
 317	struct gfs2_rgrpd *rgd;
 318	struct gfs2_holder ri_gh;
 319	int error;
 320
 321	error = gfs2_rindex_hold(sdp, &ri_gh);
 322	if (error)
 323		return error;
 324
 325	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
 326	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, ghs + 1);
 327
 328	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
 329	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 330
 331
 332	error = gfs2_glock_nq(ghs); /* parent */
 333	if (error)
 334		goto out_parent;
 335
 336	error = gfs2_glock_nq(ghs + 1); /* child */
 337	if (error)
 338		goto out_child;
 339
 340	error = gfs2_glock_nq(ghs + 2); /* rgrp */
 341	if (error)
 342		goto out_rgrp;
 343
 344	error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
 345	if (error)
 346		goto out_gunlock;
 347
 348	error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
 349	if (error)
 350		goto out_gunlock;
 351
 352	error = gfs2_dir_del(dip, &dentry->d_name);
 353        if (error)
 354                goto out_end_trans;
 355
 356	error = gfs2_change_nlink(ip, -1);
 357
 358out_end_trans:
 359	gfs2_trans_end(sdp);
 360out_gunlock:
 361	gfs2_glock_dq(ghs + 2);
 362out_rgrp:
 363	gfs2_holder_uninit(ghs + 2);
 364	gfs2_glock_dq(ghs + 1);
 365out_child:
 366	gfs2_holder_uninit(ghs + 1);
 367	gfs2_glock_dq(ghs);
 368out_parent:
 369	gfs2_holder_uninit(ghs);
 370	gfs2_glock_dq_uninit(&ri_gh);
 371	return error;
 372}
 373
 374/**
 375 * gfs2_symlink - Create a symlink
 376 * @dir: The directory to create the symlink in
 377 * @dentry: The dentry to put the symlink in
 378 * @symname: The thing which the link points to
 379 *
 380 * Returns: errno
 381 */
 382
 383static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
 384			const char *symname)
 385{
 386	struct gfs2_inode *dip = GFS2_I(dir), *ip;
 387	struct gfs2_sbd *sdp = GFS2_SB(dir);
 388	struct gfs2_holder ghs[2];
 389	struct inode *inode;
 390	struct buffer_head *dibh;
 391	int size;
 392	int error;
 393
 394	/* Must be stuffed with a null terminator for gfs2_follow_link() */
 395	size = strlen(symname);
 396	if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
 397		return -ENAMETOOLONG;
 398
 399	gfs2_holder_init(dip->i_gl, 0, 0, ghs);
 400
 401	inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0);
 402	if (IS_ERR(inode)) {
 403		gfs2_holder_uninit(ghs);
 404		return PTR_ERR(inode);
 405	}
 406
 407	ip = ghs[1].gh_gl->gl_object;
 408
 409	ip->i_disksize = size;
 410	i_size_write(inode, size);
 411
 412	error = gfs2_meta_inode_buffer(ip, &dibh);
 413
 414	if (!gfs2_assert_withdraw(sdp, !error)) {
 415		gfs2_dinode_out(ip, dibh->b_data);
 416		memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname,
 417		       size);
 418		brelse(dibh);
 419	}
 420
 421	gfs2_trans_end(sdp);
 422	if (dip->i_alloc->al_rgd)
 423		gfs2_inplace_release(dip);
 424	gfs2_quota_unlock(dip);
 425	gfs2_alloc_put(dip);
 426
 427	gfs2_glock_dq_uninit_m(2, ghs);
 428
 429	d_instantiate(dentry, inode);
 430	mark_inode_dirty(inode);
 431
 432	return 0;
 433}
 434
 435/**
 436 * gfs2_mkdir - Make a directory
 437 * @dir: The parent directory of the new one
 438 * @dentry: The dentry of the new directory
 439 * @mode: The mode of the new directory
 440 *
 441 * Returns: errno
 442 */
 443
 444static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 445{
 446	struct gfs2_inode *dip = GFS2_I(dir), *ip;
 447	struct gfs2_sbd *sdp = GFS2_SB(dir);
 448	struct gfs2_holder ghs[2];
 449	struct inode *inode;
 450	struct buffer_head *dibh;
 451	int error;
 452
 453	gfs2_holder_init(dip->i_gl, 0, 0, ghs);
 454
 455	inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);
 456	if (IS_ERR(inode)) {
 457		gfs2_holder_uninit(ghs);
 458		return PTR_ERR(inode);
 459	}
 460
 461	ip = ghs[1].gh_gl->gl_object;
 462
 463	ip->i_inode.i_nlink = 2;
 464	ip->i_disksize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
 465	ip->i_diskflags |= GFS2_DIF_JDATA;
 466	ip->i_entries = 2;
 467
 468	error = gfs2_meta_inode_buffer(ip, &dibh);
 469
 470	if (!gfs2_assert_withdraw(sdp, !error)) {
 471		struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
 472		struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
 473		struct qstr str;
 474
 475		gfs2_str2qstr(&str, ".");
 476		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 477		gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent);
 478		dent->de_inum = di->di_num; /* already GFS2 endian */
 479		dent->de_type = cpu_to_be16(DT_DIR);
 480		di->di_entries = cpu_to_be32(1);
 481
 482		gfs2_str2qstr(&str, "..");
 483		dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
 484		gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
 485
 486		gfs2_inum_out(dip, dent);
 487		dent->de_type = cpu_to_be16(DT_DIR);
 488
 489		gfs2_dinode_out(ip, di);
 490
 491		brelse(dibh);
 492	}
 493
 494	error = gfs2_change_nlink(dip, +1);
 495	gfs2_assert_withdraw(sdp, !error); /* dip already pinned */
 496
 497	gfs2_trans_end(sdp);
 498	if (dip->i_alloc->al_rgd)
 499		gfs2_inplace_release(dip);
 500	gfs2_quota_unlock(dip);
 501	gfs2_alloc_put(dip);
 502
 503	gfs2_glock_dq_uninit_m(2, ghs);
 504
 505	d_instantiate(dentry, inode);
 506	mark_inode_dirty(inode);
 507
 508	return 0;
 509}
 510
 511/**
 512 * gfs2_rmdiri - Remove a directory
 513 * @dip: The parent directory of the directory to be removed
 514 * @name: The name of the directory to be removed
 515 * @ip: The GFS2 inode of the directory to be removed
 516 *
 517 * Assumes Glocks on dip and ip are held
 518 *
 519 * Returns: errno
 520 */
 521
 522static int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
 523		       struct gfs2_inode *ip)
 524{
 525	struct qstr dotname;
 526	int error;
 527
 528	if (ip->i_entries != 2) {
 529		if (gfs2_consist_inode(ip))
 530			gfs2_dinode_print(ip);
 531		return -EIO;
 532	}
 533
 534	error = gfs2_dir_del(dip, name);
 535	if (error)
 536		return error;
 537
 538	error = gfs2_change_nlink(dip, -1);
 539	if (error)
 540		return error;
 541
 542	gfs2_str2qstr(&dotname, ".");
 543	error = gfs2_dir_del(ip, &dotname);
 544	if (error)
 545		return error;
 546
 547	gfs2_str2qstr(&dotname, "..");
 548	error = gfs2_dir_del(ip, &dotname);
 549	if (error)
 550		return error;
 551
 552	/* It looks odd, but it really should be done twice */
 553	error = gfs2_change_nlink(ip, -1);
 554	if (error)
 555		return error;
 556
 557	error = gfs2_change_nlink(ip, -1);
 558	if (error)
 559		return error;
 560
 561	return error;
 562}
 563
 564/**
 565 * gfs2_rmdir - Remove a directory
 566 * @dir: The parent directory of the directory to be removed
 567 * @dentry: The dentry of the directory to remove
 568 *
 569 * Remove a directory. Call gfs2_rmdiri()
 570 *
 571 * Returns: errno
 572 */
 573
 574static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
 575{
 576	struct gfs2_inode *dip = GFS2_I(dir);
 577	struct gfs2_sbd *sdp = GFS2_SB(dir);
 578	struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 579	struct gfs2_holder ghs[3];
 580	struct gfs2_rgrpd *rgd;
 581	struct gfs2_holder ri_gh;
 582	int error;
 583
 584	error = gfs2_rindex_hold(sdp, &ri_gh);
 585	if (error)
 586		return error;
 587	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
 588	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
 589
 590	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
 591	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 592
 593	error = gfs2_glock_nq(ghs); /* parent */
 594	if (error)
 595		goto out_parent;
 596
 597	error = gfs2_glock_nq(ghs + 1); /* child */
 598	if (error)
 599		goto out_child;
 600
 601	error = gfs2_glock_nq(ghs + 2); /* rgrp */
 602	if (error)
 603		goto out_rgrp;
 604
 605	error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
 606	if (error)
 607		goto out_gunlock;
 608
 609	if (ip->i_entries < 2) {
 610		if (gfs2_consist_inode(ip))
 611			gfs2_dinode_print(ip);
 612		error = -EIO;
 613		goto out_gunlock;
 614	}
 615	if (ip->i_entries > 2) {
 616		error = -ENOTEMPTY;
 617		goto out_gunlock;
 618	}
 619
 620	error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0);
 621	if (error)
 622		goto out_gunlock;
 623
 624	error = gfs2_rmdiri(dip, &dentry->d_name, ip);
 625
 626	gfs2_trans_end(sdp);
 627
 628out_gunlock:
 629	gfs2_glock_dq(ghs + 2);
 630out_rgrp:
 631	gfs2_holder_uninit(ghs + 2);
 632	gfs2_glock_dq(ghs + 1);
 633out_child:
 634	gfs2_holder_uninit(ghs + 1);
 635	gfs2_glock_dq(ghs);
 636out_parent:
 637	gfs2_holder_uninit(ghs);
 638	gfs2_glock_dq_uninit(&ri_gh);
 639	return error;
 640}
 641
 642/**
 643 * gfs2_mknod - Make a special file
 644 * @dir: The directory in which the special file will reside
 645 * @dentry: The dentry of the special file
 646 * @mode: The mode of the special file
 647 * @rdev: The device specification of the special file
 648 *
 649 */
 650
 651static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
 652		      dev_t dev)
 653{
 654	struct gfs2_inode *dip = GFS2_I(dir);
 655	struct gfs2_sbd *sdp = GFS2_SB(dir);
 656	struct gfs2_holder ghs[2];
 657	struct inode *inode;
 658
 659	gfs2_holder_init(dip->i_gl, 0, 0, ghs);
 660
 661	inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);
 662	if (IS_ERR(inode)) {
 663		gfs2_holder_uninit(ghs);
 664		return PTR_ERR(inode);
 665	}
 666
 667	gfs2_trans_end(sdp);
 668	if (dip->i_alloc->al_rgd)
 669		gfs2_inplace_release(dip);
 670	gfs2_quota_unlock(dip);
 671	gfs2_alloc_put(dip);
 672
 673	gfs2_glock_dq_uninit_m(2, ghs);
 674
 675	d_instantiate(dentry, inode);
 676	mark_inode_dirty(inode);
 677
 678	return 0;
 679}
 680
 681/*
 682 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
 683 * @this: move this
 684 * @to: to here
 685 *
 686 * Follow @to back to the root and make sure we don't encounter @this
 687 * Assumes we already hold the rename lock.
 688 *
 689 * Returns: errno
 690 */
 691
 692static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
 693{
 694	struct inode *dir = &to->i_inode;
 695	struct super_block *sb = dir->i_sb;
 696	struct inode *tmp;
 697	struct qstr dotdot;
 698	int error = 0;
 699
 700	gfs2_str2qstr(&dotdot, "..");
 701
 702	igrab(dir);
 703
 704	for (;;) {
 705		if (dir == &this->i_inode) {
 706			error = -EINVAL;
 707			break;
 708		}
 709		if (dir == sb->s_root->d_inode) {
 710			error = 0;
 711			break;
 712		}
 713
 714		tmp = gfs2_lookupi(dir, &dotdot, 1);
 715		if (IS_ERR(tmp)) {
 716			error = PTR_ERR(tmp);
 717			break;
 718		}
 719
 720		iput(dir);
 721		dir = tmp;
 722	}
 723
 724	iput(dir);
 725
 726	return error;
 727}
 728
 729/**
 730 * gfs2_rename - Rename a file
 731 * @odir: Parent directory of old file name
 732 * @odentry: The old dentry of the file
 733 * @ndir: Parent directory of new file name
 734 * @ndentry: The new dentry of the file
 735 *
 736 * Returns: errno
 737 */
 738
 739static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 740		       struct inode *ndir, struct dentry *ndentry)
 741{
 742	struct gfs2_inode *odip = GFS2_I(odir);
 743	struct gfs2_inode *ndip = GFS2_I(ndir);
 744	struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
 745	struct gfs2_inode *nip = NULL;
 746	struct gfs2_sbd *sdp = GFS2_SB(odir);
 747	struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
 748	struct gfs2_rgrpd *nrgd;
 749	unsigned int num_gh;
 750	int dir_rename = 0;
 751	int alloc_required = 0;
 752	unsigned int x;
 753	int error;
 754
 755	if (ndentry->d_inode) {
 756		nip = GFS2_I(ndentry->d_inode);
 757		if (ip == nip)
 758			return 0;
 759	}
 760
 761
 762	if (odip != ndip) {
 763		error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
 764					   0, &r_gh);
 765		if (error)
 766			goto out;
 767
 768		if (S_ISDIR(ip->i_inode.i_mode)) {
 769			dir_rename = 1;
 770			/* don't move a dirctory into it's subdir */
 771			error = gfs2_ok_to_move(ip, ndip);
 772			if (error)
 773				goto out_gunlock_r;
 774		}
 775	}
 776
 777	num_gh = 1;
 778	gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
 779	if (odip != ndip) {
 780		gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
 781		num_gh++;
 782	}
 783	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
 784	num_gh++;
 785
 786	if (nip) {
 787		gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
 788		num_gh++;
 789		/* grab the resource lock for unlink flag twiddling 
 790		 * this is the case of the target file already existing
 791		 * so we unlink before doing the rename
 792		 */
 793		nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
 794		if (nrgd)
 795			gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
 796	}
 797
 798	for (x = 0; x < num_gh; x++) {
 799		error = gfs2_glock_nq(ghs + x);
 800		if (error)
 801			goto out_gunlock;
 802	}
 803
 804	/* Check out the old directory */
 805
 806	error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
 807	if (error)
 808		goto out_gunlock;
 809
 810	/* Check out the new directory */
 811
 812	if (nip) {
 813		error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
 814		if (error)
 815			goto out_gunlock;
 816
 817		if (S_ISDIR(nip->i_inode.i_mode)) {
 818			if (nip->i_entries < 2) {
 819				if (gfs2_consist_inode(nip))
 820					gfs2_dinode_print(nip);
 821				error = -EIO;
 822				goto out_gunlock;
 823			}
 824			if (nip->i_entries > 2) {
 825				error = -ENOTEMPTY;
 826				goto out_gunlock;
 827			}
 828		}
 829	} else {
 830		error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
 831		if (error)
 832			goto out_gunlock;
 833
 834		error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
 835		switch (error) {
 836		case -ENOENT:
 837			error = 0;
 838			break;
 839		case 0:
 840			error = -EEXIST;
 841		default:
 842			goto out_gunlock;
 843		};
 844
 845		if (odip != ndip) {
 846			if (!ndip->i_inode.i_nlink) {
 847				error = -EINVAL;
 848				goto out_gunlock;
 849			}
 850			if (ndip->i_entries == (u32)-1) {
 851				error = -EFBIG;
 852				goto out_gunlock;
 853			}
 854			if (S_ISDIR(ip->i_inode.i_mode) &&
 855			    ndip->i_inode.i_nlink == (u32)-1) {
 856				error = -EMLINK;
 857				goto out_gunlock;
 858			}
 859		}
 860	}
 861
 862	/* Check out the dir to be renamed */
 863
 864	if (dir_rename) {
 865		error = gfs2_permission(odentry->d_inode, MAY_WRITE);
 866		if (error)
 867			goto out_gunlock;
 868	}
 869
 870	if (nip == NULL)
 871		alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
 872	error = alloc_required;
 873	if (error < 0)
 874		goto out_gunlock;
 875	error = 0;
 876
 877	if (alloc_required) {
 878		struct gfs2_alloc *al = gfs2_alloc_get(ndip);
 879		if (!al) {
 880			error = -ENOMEM;
 881			goto out_gunlock;
 882		}
 883
 884		error = gfs2_quota_lock_check(ndip);
 885		if (error)
 886			goto out_alloc;
 887
 888		al->al_requested = sdp->sd_max_dirres;
 889
 890		error = gfs2_inplace_reserve(ndip);
 891		if (error)
 892			goto out_gunlock_q;
 893
 894		error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
 895					 al->al_rgd->rd_length +
 896					 4 * RES_DINODE + 4 * RES_LEAF +
 897					 RES_STATFS + RES_QUOTA + 4, 0);
 898		if (error)
 899			goto out_ipreserv;
 900	} else {
 901		error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
 902					 5 * RES_LEAF + 4, 0);
 903		if (error)
 904			goto out_gunlock;
 905	}
 906
 907	/* Remove the target file, if it exists */
 908
 909	if (nip) {
 910		if (S_ISDIR(nip->i_inode.i_mode))
 911			error = gfs2_rmdiri(ndip, &ndentry->d_name, nip);
 912		else {
 913			error = gfs2_dir_del(ndip, &ndentry->d_name);
 914			if (error)
 915				goto out_end_trans;
 916			error = gfs2_change_nlink(nip, -1);
 917		}
 918		if (error)
 919			goto out_end_trans;
 920	}
 921
 922	if (dir_rename) {
 923		struct qstr name;
 924		gfs2_str2qstr(&name, "..");
 925
 926		error = gfs2_change_nlink(ndip, +1);
 927		if (error)
 928			goto out_end_trans;
 929		error = gfs2_change_nlink(odip, -1);
 930		if (error)
 931			goto out_end_trans;
 932
 933		error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
 934		if (error)
 935			goto out_end_trans;
 936	} else {
 937		struct buffer_head *dibh;
 938		error = gfs2_meta_inode_buffer(ip, &dibh);
 939		if (error)
 940			goto out_end_trans;
 941		ip->i_inode.i_ctime = CURRENT_TIME;
 942		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 943		gfs2_dinode_out(ip, dibh->b_data);
 944		brelse(dibh);
 945	}
 946
 947	error = gfs2_dir_del(odip, &odentry->d_name);
 948	if (error)
 949		goto out_end_trans;
 950
 951	error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
 952	if (error)
 953		goto out_end_trans;
 954
 955out_end_trans:
 956	gfs2_trans_end(sdp);
 957out_ipreserv:
 958	if (alloc_required)
 959		gfs2_inplace_release(ndip);
 960out_gunlock_q:
 961	if (alloc_required)
 962		gfs2_quota_unlock(ndip);
 963out_alloc:
 964	if (alloc_required)
 965		gfs2_alloc_put(ndip);
 966out_gunlock:
 967	while (x--) {
 968		gfs2_glock_dq(ghs + x);
 969		gfs2_holder_uninit(ghs + x);
 970	}
 971out_gunlock_r:
 972	if (r_gh.gh_gl)
 973		gfs2_glock_dq_uninit(&r_gh);
 974out:
 975	return error;
 976}
 977
 978/**
 979 * gfs2_readlinki - return the contents of a symlink
 980 * @ip: the symlink's inode
 981 * @buf: a pointer to the buffer to be filled
 982 * @len: a pointer to the length of @buf
 983 *
 984 * If @buf is too small, a piece of memory is kmalloc()ed and needs
 985 * to be freed by the caller.
 986 *
 987 * Returns: errno
 988 */
 989
 990static int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
 991{
 992	struct gfs2_holder i_gh;
 993	struct buffer_head *dibh;
 994	unsigned int x;
 995	int error;
 996
 997	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
 998	error = gfs2_glock_nq(&i_gh);
 999	if (error) {
1000		gfs2_holder_uninit(&i_gh);
1001		return error;
1002	}
1003
1004	if (!ip->i_disksize) {
1005		gfs2_consist_inode(ip);
1006		error = -EIO;
1007		goto out;
1008	}
1009
1010	error = gfs2_meta_inode_buffer(ip, &dibh);
1011	if (error)
1012		goto out;
1013
1014	x = ip->i_disksize + 1;
1015	if (x > *len) {
1016		*buf = kmalloc(x, GFP_NOFS);
1017		if (!*buf) {
1018			error = -ENOMEM;
1019			goto out_brelse;
1020		}
1021	}
1022
1023	memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1024	*len = x;
1025
1026out_brelse:
1027	brelse(dibh);
1028out:
1029	gfs2_glock_dq_uninit(&i_gh);
1030	return error;
1031}
1032
1033/**
1034 * gfs2_readlink - Read the value of a symlink
1035 * @dentry: the symlink
1036 * @buf: the buffer to read the symlink data into
1037 * @size: the size of the buffer
1038 *
1039 * Returns: errno
1040 */
1041
1042static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
1043			 int user_size)
1044{
1045	struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
1046	char array[GFS2_FAST_NAME_SIZE], *buf = array;
1047	unsigned int len = GFS2_FAST_NAME_SIZE;
1048	int error;
1049
1050	error = gfs2_readlinki(ip, &buf, &len);
1051	if (error)
1052		return error;
1053
1054	if (user_size > len - 1)
1055		user_size = len - 1;
1056
1057	if (copy_to_user(user_buf, buf, user_size))
1058		error = -EFAULT;
1059	else
1060		error = user_size;
1061
1062	if (buf != array)
1063		kfree(buf);
1064
1065	return error;
1066}
1067
1068/**
1069 * gfs2_follow_link - Follow a symbolic link
1070 * @dentry: The dentry of the link
1071 * @nd: Data that we pass to vfs_follow_link()
1072 *
1073 * This can handle symlinks of any size. It is optimised for symlinks
1074 * under GFS2_FAST_NAME_SIZE.
1075 *
1076 * Returns: 0 on success or error code
1077 */
1078
1079static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
1080{
1081	struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
1082	char array[GFS2_FAST_NAME_SIZE], *buf = array;
1083	unsigned int len = GFS2_FAST_NAME_SIZE;
1084	int error;
1085
1086	error = gfs2_readlinki(ip, &buf, &len);
1087	if (!error) {
1088		error = vfs_follow_link(nd, buf);
1089		if (buf != array)
1090			kfree(buf);
1091	} else
1092		path_put(&nd->path);
1093
1094	return ERR_PTR(error);
1095}
1096
1097/**
1098 * gfs2_permission -
1099 * @inode:
1100 * @mask:
1101 * @nd: passed from Linux VFS, ignored by us
1102 *
1103 * This may be called from the VFS directly, or from within GFS2 with the
1104 * inode locked, so we look to see if the glock is already locked and only
1105 * lock the glock if its not already been done.
1106 *
1107 * Returns: errno
1108 */
1109
1110int gfs2_permission(struct inode *inode, int mask)
1111{
1112	struct gfs2_inode *ip = GFS2_I(inode);
1113	struct gfs2_holder i_gh;
1114	int error;
1115	int unlock = 0;
1116
1117	if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1118		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
1119		if (error)
1120			return error;
1121		unlock = 1;
1122	}
1123
1124	if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
1125		error = -EACCES;
1126	else
1127		error = generic_permission(inode, mask, gfs2_check_acl);
1128	if (unlock)
1129		gfs2_glock_dq_uninit(&i_gh);
1130
1131	return error;
1132}
1133
1134static int setattr_size(struct inode *inode, struct iattr *attr)
1135{
1136	struct gfs2_inode *ip = GFS2_I(inode);
1137	struct gfs2_sbd *sdp = GFS2_SB(inode);
1138	int error;
1139
1140	if (attr->ia_size != ip->i_disksize) {
1141		error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1142		if (error)
1143			return error;
1144		error = vmtruncate(inode, attr->ia_size);
1145		gfs2_trans_end(sdp);
1146		if (error) 
1147			return error;
1148	}
1149
1150	error = gfs2_truncatei(ip, attr->ia_size);
1151	if (error && (inode->i_size != ip->i_disksize))
1152		i_size_write(inode, ip->i_disksize);
1153
1154	return error;
1155}
1156
1157static int setattr_chown(struct inode *inode, struct iattr *attr)
1158{
1159	struct gfs2_inode *ip = GFS2_I(inode);
1160	struct gfs2_sbd *sdp = GFS2_SB(inode);
1161	struct buffer_head *dibh;
1162	u32 ouid, ogid, nuid, ngid;
1163	int error;
1164
1165	ouid = inode->i_uid;
1166	ogid = inode->i_gid;
1167	nuid = attr->ia_uid;
1168	ngid = attr->ia_gid;
1169
1170	if (!(attr->ia_valid & ATTR_UID) || ouid == nuid)
1171		ouid = nuid = NO_QUOTA_CHANGE;
1172	if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
1173		ogid = ngid = NO_QUOTA_CHANGE;
1174
1175	if (!gfs2_alloc_get(ip))
1176		return -ENOMEM;
1177
1178	error = gfs2_quota_lock(ip, nuid, ngid);
1179	if (error)
1180		goto out_alloc;
1181
1182	if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
1183		error = gfs2_quota_check(ip, nuid, ngid);
1184		if (error)
1185			goto out_gunlock_q;
1186	}
1187
1188	error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
1189	if (error)
1190		goto out_gunlock_q;
1191
1192	error = gfs2_meta_inode_buffer(ip, &dibh);
1193	if (error)
1194		goto out_end_trans;
1195
1196	error = inode_setattr(inode, attr);
1197	gfs2_assert_warn(sdp, !error);
1198
1199	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1200	gfs2_dinode_out(ip, dibh->b_data);
1201	brelse(dibh);
1202
1203	if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
1204		u64 blocks = gfs2_get_inode_blocks(&ip->i_inode);
1205		gfs2_quota_change(ip, -blocks, ouid, ogid);
1206		gfs2_quota_change(ip, blocks, nuid, ngid);
1207	}
1208
1209out_end_trans:
1210	gfs2_trans_end(sdp);
1211out_gunlock_q:
1212	gfs2_quota_unlock(ip);
1213out_alloc:
1214	gfs2_alloc_put(ip);
1215	return error;
1216}
1217
1218/**
1219 * gfs2_setattr - Change attributes on an inode
1220 * @dentry: The dentry which is changing
1221 * @attr: The structure describing the change
1222 *
1223 * The VFS layer wants to change one or more of an inodes attributes.  Write
1224 * that change out to disk.
1225 *
1226 * Returns: errno
1227 */
1228
1229static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
1230{
1231	struct inode *inode = dentry->d_inode;
1232	struct gfs2_inode *ip = GFS2_I(inode);
1233	struct gfs2_holder i_gh;
1234	int error;
1235
1236	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1237	if (error)
1238		return error;
1239
1240	error = -EPERM;
1241	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1242		goto out;
1243
1244	error = inode_change_ok(inode, attr);
1245	if (error)
1246		goto out;
1247
1248	if (attr->ia_valid & ATTR_SIZE)
1249		error = setattr_size(inode, attr);
1250	else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
1251		error = setattr_chown(inode, attr);
1252	else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode))
1253		error = gfs2_acl_chmod(ip, attr);
1254	else
1255		error = gfs2_setattr_simple(ip, attr);
1256
1257out:
1258	gfs2_glock_dq_uninit(&i_gh);
1259	if (!error)
1260		mark_inode_dirty(inode);
1261	return error;
1262}
1263
1264/**
1265 * gfs2_getattr - Read out an inode's attributes
1266 * @mnt: The vfsmount the inode is being accessed from
1267 * @dentry: The dentry to stat
1268 * @stat: The inode's stats
1269 *
1270 * This may be called from the VFS directly, or from within GFS2 with the
1271 * inode locked, so we look to see if the glock is already locked and only
1272 * lock the glock if its not already been done. Note that its the NFS
1273 * readdirplus operation which causes this to be called (from filldir)
1274 * with the glock already held.
1275 *
1276 * Returns: errno
1277 */
1278
1279static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
1280			struct kstat *stat)
1281{
1282	struct inode *inode = dentry->d_inode;
1283	struct gfs2_inode *ip = GFS2_I(inode);
1284	struct gfs2_holder gh;
1285	int error;
1286	int unlock = 0;
1287
1288	if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
1289		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1290		if (error)
1291			return error;
1292		unlock = 1;
1293	}
1294
1295	generic_fillattr(inode, stat);
1296	if (unlock)
1297		gfs2_glock_dq_uninit(&gh);
1298
1299	return 0;
1300}
1301
1302static int gfs2_setxattr(struct dentry *dentry, const char *name,
1303			 const void *data, size_t size, int flags)
1304{
1305	struct inode *inode = dentry->d_inode;
1306	struct gfs2_inode *ip = GFS2_I(inode);
1307	struct gfs2_holder gh;
1308	int ret;
1309
1310	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1311	ret = gfs2_glock_nq(&gh);
1312	if (ret == 0) {
1313		ret = generic_setxattr(dentry, name, data, size, flags);
1314		gfs2_glock_dq(&gh);
1315	}
1316	gfs2_holder_uninit(&gh);
1317	return ret;
1318}
1319
1320static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
1321			     void *data, size_t size)
1322{
1323	struct inode *inode = dentry->d_inode;
1324	struct gfs2_inode *ip = GFS2_I(inode);
1325	struct gfs2_holder gh;
1326	int ret;
1327
1328	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
1329	ret = gfs2_glock_nq(&gh);
1330	if (ret == 0) {
1331		ret = generic_getxattr(dentry, name, data, size);
1332		gfs2_glock_dq(&gh);
1333	}
1334	gfs2_holder_uninit(&gh);
1335	return ret;
1336}
1337
1338static int gfs2_removexattr(struct dentry *dentry, const char *name)
1339{
1340	struct inode *inode = dentry->d_inode;
1341	struct gfs2_inode *ip = GFS2_I(inode);
1342	struct gfs2_holder gh;
1343	int ret;
1344
1345	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1346	ret = gfs2_glock_nq(&gh);
1347	if (ret == 0) {
1348		ret = generic_removexattr(dentry, name);
1349		gfs2_glock_dq(&gh);
1350	}
1351	gfs2_holder_uninit(&gh);
1352	return ret;
1353}
1354
1355static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1356		       u64 start, u64 len)
1357{
1358	struct gfs2_inode *ip = GFS2_I(inode);
1359	struct gfs2_holder gh;
1360	int ret;
1361
1362	ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
1363	if (ret)
1364		return ret;
1365
1366	mutex_lock(&inode->i_mutex);
1367
1368	ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
1369	if (ret)
1370		goto out;
1371
1372	if (gfs2_is_stuffed(ip)) {
1373		u64 phys = ip->i_no_addr << inode->i_blkbits;
1374		u64 size = i_size_read(inode);
1375		u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED|
1376			    FIEMAP_EXTENT_DATA_INLINE;
1377		phys += sizeof(struct gfs2_dinode);
1378		phys += start;
1379		if (start + len > size)
1380			len = size - start;
1381		if (start < size)
1382			ret = fiemap_fill_next_extent(fieinfo, start, phys,
1383						      len, flags);
1384		if (ret == 1)
1385			ret = 0;
1386	} else {
1387		ret = __generic_block_fiemap(inode, fieinfo, start, len,
1388					     gfs2_block_map);
1389	}
1390
1391	gfs2_glock_dq_uninit(&gh);
1392out:
1393	mutex_unlock(&inode->i_mutex);
1394	return ret;
1395}
1396
1397const struct inode_operations gfs2_file_iops = {
1398	.permission = gfs2_permission,
1399	.setattr = gfs2_setattr,
1400	.getattr = gfs2_getattr,
1401	.setxattr = gfs2_setxattr,
1402	.getxattr = gfs2_getxattr,
1403	.listxattr = gfs2_listxattr,
1404	.removexattr = gfs2_removexattr,
1405	.fiemap = gfs2_fiemap,
1406};
1407
1408const struct inode_operations gfs2_dir_iops = {
1409	.create = gfs2_create,
1410	.lookup = gfs2_lookup,
1411	.link = gfs2_link,
1412	.unlink = gfs2_unlink,
1413	.symlink = gfs2_symlink,
1414	.mkdir = gfs2_mkdir,
1415	.rmdir = gfs2_rmdir,
1416	.mknod = gfs2_mknod,
1417	.rename = gfs2_rename,
1418	.permission = gfs2_permission,
1419	.setattr = gfs2_setattr,
1420	.getattr = gfs2_getattr,
1421	.setxattr = gfs2_setxattr,
1422	.getxattr = gfs2_getxattr,
1423	.listxattr = gfs2_listxattr,
1424	.removexattr = gfs2_removexattr,
1425	.fiemap = gfs2_fiemap,
1426};
1427
1428const struct inode_operations gfs2_symlink_iops = {
1429	.readlink = gfs2_readlink,
1430	.follow_link = gfs2_follow_link,
1431	.permission = gfs2_permission,
1432	.setattr = gfs2_setattr,
1433	.getattr = gfs2_getattr,
1434	.setxattr = gfs2_setxattr,
1435	.getxattr = gfs2_getxattr,
1436	.listxattr = gfs2_listxattr,
1437	.removexattr = gfs2_removexattr,
1438	.fiemap = gfs2_fiemap,
1439};
1440