1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   4 * All Rights Reserved.
 
 
 
 
 
 
 
 
 
 
 
 
 
   5 */
   6#include "xfs.h"
   7#include "xfs_fs.h"
   8#include "xfs_shared.h"
   9#include "xfs_format.h"
  10#include "xfs_log_format.h"
  11#include "xfs_trans_resv.h"
 
  12#include "xfs_mount.h"
 
 
  13#include "xfs_inode.h"
 
  14#include "xfs_rtalloc.h"
  15#include "xfs_iwalk.h"
  16#include "xfs_itable.h"
  17#include "xfs_error.h"
  18#include "xfs_da_format.h"
  19#include "xfs_da_btree.h"
  20#include "xfs_attr.h"
  21#include "xfs_bmap.h"
  22#include "xfs_bmap_util.h"
 
 
  23#include "xfs_fsops.h"
 
  24#include "xfs_discard.h"
  25#include "xfs_quota.h"
 
  26#include "xfs_export.h"
  27#include "xfs_trace.h"
  28#include "xfs_icache.h"
  29#include "xfs_trans.h"
  30#include "xfs_acl.h"
  31#include "xfs_btree.h"
  32#include <linux/fsmap.h>
  33#include "xfs_fsmap.h"
  34#include "scrub/xfs_scrub.h"
  35#include "xfs_sb.h"
  36#include "xfs_ag.h"
  37#include "xfs_health.h"
  38#include "xfs_reflink.h"
  39#include "xfs_ioctl.h"
  40#include "xfs_xattr.h"
  41
 
 
  42#include <linux/mount.h>
  43#include <linux/namei.h>
  44#include <linux/fileattr.h>
 
 
  45
  46/*
  47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
  48 * a file or fs handle.
  49 *
  50 * XFS_IOC_PATH_TO_FSHANDLE
  51 *    returns fs handle for a mount point or path within that mount point
  52 * XFS_IOC_FD_TO_HANDLE
  53 *    returns full handle for a FD opened in user space
  54 * XFS_IOC_PATH_TO_HANDLE
  55 *    returns full handle for a path
  56 */
  57int
  58xfs_find_handle(
  59	unsigned int		cmd,
  60	xfs_fsop_handlereq_t	*hreq)
  61{
  62	int			hsize;
  63	xfs_handle_t		handle;
  64	struct inode		*inode;
  65	struct fd		f = {NULL};
  66	struct path		path;
  67	int			error;
  68	struct xfs_inode	*ip;
  69
  70	if (cmd == XFS_IOC_FD_TO_HANDLE) {
  71		f = fdget(hreq->fd);
  72		if (!f.file)
  73			return -EBADF;
  74		inode = file_inode(f.file);
  75	} else {
  76		error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
  77		if (error)
  78			return error;
  79		inode = d_inode(path.dentry);
  80	}
  81	ip = XFS_I(inode);
  82
  83	/*
  84	 * We can only generate handles for inodes residing on a XFS filesystem,
  85	 * and only for regular files, directories or symbolic links.
  86	 */
  87	error = -EINVAL;
  88	if (inode->i_sb->s_magic != XFS_SB_MAGIC)
  89		goto out_put;
  90
  91	error = -EBADF;
  92	if (!S_ISREG(inode->i_mode) &&
  93	    !S_ISDIR(inode->i_mode) &&
  94	    !S_ISLNK(inode->i_mode))
  95		goto out_put;
  96
  97
  98	memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
  99
 100	if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
 101		/*
 102		 * This handle only contains an fsid, zero the rest.
 103		 */
 104		memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
 105		hsize = sizeof(xfs_fsid_t);
 106	} else {
 
 
 
 107		handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
 108					sizeof(handle.ha_fid.fid_len);
 109		handle.ha_fid.fid_pad = 0;
 110		handle.ha_fid.fid_gen = inode->i_generation;
 111		handle.ha_fid.fid_ino = ip->i_ino;
 112		hsize = sizeof(xfs_handle_t);
 
 
 113	}
 114
 115	error = -EFAULT;
 116	if (copy_to_user(hreq->ohandle, &handle, hsize) ||
 117	    copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
 118		goto out_put;
 119
 120	error = 0;
 121
 122 out_put:
 123	if (cmd == XFS_IOC_FD_TO_HANDLE)
 124		fdput(f);
 125	else
 126		path_put(&path);
 127	return error;
 128}
 129
 130/*
 131 * No need to do permission checks on the various pathname components
 132 * as the handle operations are privileged.
 133 */
 134STATIC int
 135xfs_handle_acceptable(
 136	void			*context,
 137	struct dentry		*dentry)
 138{
 139	return 1;
 140}
 141
 142/*
 143 * Convert userspace handle data into a dentry.
 144 */
 145struct dentry *
 146xfs_handle_to_dentry(
 147	struct file		*parfilp,
 148	void __user		*uhandle,
 149	u32			hlen)
 150{
 151	xfs_handle_t		handle;
 152	struct xfs_fid64	fid;
 153
 154	/*
 155	 * Only allow handle opens under a directory.
 156	 */
 157	if (!S_ISDIR(file_inode(parfilp)->i_mode))
 158		return ERR_PTR(-ENOTDIR);
 159
 160	if (hlen != sizeof(xfs_handle_t))
 161		return ERR_PTR(-EINVAL);
 162	if (copy_from_user(&handle, uhandle, hlen))
 163		return ERR_PTR(-EFAULT);
 164	if (handle.ha_fid.fid_len !=
 165	    sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
 166		return ERR_PTR(-EINVAL);
 167
 168	memset(&fid, 0, sizeof(struct fid));
 169	fid.ino = handle.ha_fid.fid_ino;
 170	fid.gen = handle.ha_fid.fid_gen;
 171
 172	return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
 173			FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
 174			xfs_handle_acceptable, NULL);
 175}
 176
 177STATIC struct dentry *
 178xfs_handlereq_to_dentry(
 179	struct file		*parfilp,
 180	xfs_fsop_handlereq_t	*hreq)
 181{
 182	return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
 183}
 184
 185int
 186xfs_open_by_handle(
 187	struct file		*parfilp,
 188	xfs_fsop_handlereq_t	*hreq)
 189{
 190	const struct cred	*cred = current_cred();
 191	int			error;
 192	int			fd;
 193	int			permflag;
 194	struct file		*filp;
 195	struct inode		*inode;
 196	struct dentry		*dentry;
 197	fmode_t			fmode;
 198	struct path		path;
 199
 200	if (!capable(CAP_SYS_ADMIN))
 201		return -EPERM;
 202
 203	dentry = xfs_handlereq_to_dentry(parfilp, hreq);
 204	if (IS_ERR(dentry))
 205		return PTR_ERR(dentry);
 206	inode = d_inode(dentry);
 207
 208	/* Restrict xfs_open_by_handle to directories & regular files. */
 209	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
 210		error = -EPERM;
 211		goto out_dput;
 212	}
 213
 214#if BITS_PER_LONG != 32
 215	hreq->oflags |= O_LARGEFILE;
 216#endif
 217
 218	permflag = hreq->oflags;
 219	fmode = OPEN_FMODE(permflag);
 220	if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
 221	    (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
 222		error = -EPERM;
 223		goto out_dput;
 224	}
 225
 226	if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
 227		error = -EPERM;
 228		goto out_dput;
 229	}
 230
 231	/* Can't write directories. */
 232	if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
 233		error = -EISDIR;
 234		goto out_dput;
 235	}
 236
 237	fd = get_unused_fd_flags(0);
 238	if (fd < 0) {
 239		error = fd;
 240		goto out_dput;
 241	}
 242
 243	path.mnt = parfilp->f_path.mnt;
 244	path.dentry = dentry;
 245	filp = dentry_open(&path, hreq->oflags, cred);
 246	dput(dentry);
 247	if (IS_ERR(filp)) {
 248		put_unused_fd(fd);
 249		return PTR_ERR(filp);
 250	}
 251
 252	if (S_ISREG(inode->i_mode)) {
 253		filp->f_flags |= O_NOATIME;
 254		filp->f_mode |= FMODE_NOCMTIME;
 255	}
 256
 257	fd_install(fd, filp);
 258	return fd;
 259
 260 out_dput:
 261	dput(dentry);
 262	return error;
 263}
 264
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 265int
 266xfs_readlink_by_handle(
 267	struct file		*parfilp,
 268	xfs_fsop_handlereq_t	*hreq)
 269{
 270	struct dentry		*dentry;
 271	__u32			olen;
 
 272	int			error;
 273
 274	if (!capable(CAP_SYS_ADMIN))
 275		return -EPERM;
 276
 277	dentry = xfs_handlereq_to_dentry(parfilp, hreq);
 278	if (IS_ERR(dentry))
 279		return PTR_ERR(dentry);
 280
 281	/* Restrict this handle operation to symlinks only. */
 282	if (!d_is_symlink(dentry)) {
 283		error = -EINVAL;
 284		goto out_dput;
 285	}
 286
 287	if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
 288		error = -EFAULT;
 
 
 
 
 
 
 289		goto out_dput;
 290	}
 291
 292	error = vfs_readlink(dentry, hreq->ohandle, olen);
 
 
 
 
 
 293
 
 
 294 out_dput:
 295	dput(dentry);
 296	return error;
 297}
 298
 299/*
 300 * Format an attribute and copy it out to the user's buffer.
 301 * Take care to check values and protect against them changing later,
 302 * we may be reading them directly out of a user buffer.
 303 */
 304static void
 305xfs_ioc_attr_put_listent(
 306	struct xfs_attr_list_context *context,
 307	int			flags,
 308	unsigned char		*name,
 309	int			namelen,
 310	int			valuelen)
 311{
 312	struct xfs_attrlist	*alist = context->buffer;
 313	struct xfs_attrlist_ent	*aep;
 314	int			arraytop;
 315
 316	ASSERT(!context->seen_enough);
 317	ASSERT(context->count >= 0);
 318	ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
 319	ASSERT(context->firstu >= sizeof(*alist));
 320	ASSERT(context->firstu <= context->bufsize);
 321
 322	/*
 323	 * Only list entries in the right namespace.
 324	 */
 325	if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
 326		return;
 327
 328	arraytop = sizeof(*alist) +
 329			context->count * sizeof(alist->al_offset[0]);
 330
 331	/* decrement by the actual bytes used by the attr */
 332	context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
 333			namelen + 1, sizeof(uint32_t));
 334	if (context->firstu < arraytop) {
 335		trace_xfs_attr_list_full(context);
 336		alist->al_more = 1;
 337		context->seen_enough = 1;
 338		return;
 339	}
 340
 341	aep = context->buffer + context->firstu;
 342	aep->a_valuelen = valuelen;
 343	memcpy(aep->a_name, name, namelen);
 344	aep->a_name[namelen] = 0;
 345	alist->al_offset[context->count++] = context->firstu;
 346	alist->al_count = context->count;
 347	trace_xfs_attr_list_add(context);
 348}
 349
 350static unsigned int
 351xfs_attr_filter(
 352	u32			ioc_flags)
 353{
 354	if (ioc_flags & XFS_IOC_ATTR_ROOT)
 355		return XFS_ATTR_ROOT;
 356	if (ioc_flags & XFS_IOC_ATTR_SECURE)
 357		return XFS_ATTR_SECURE;
 358	return 0;
 359}
 360
 361static unsigned int
 362xfs_attr_flags(
 363	u32			ioc_flags)
 364{
 365	if (ioc_flags & XFS_IOC_ATTR_CREATE)
 366		return XATTR_CREATE;
 367	if (ioc_flags & XFS_IOC_ATTR_REPLACE)
 368		return XATTR_REPLACE;
 369	return 0;
 370}
 371
 372int
 373xfs_ioc_attr_list(
 374	struct xfs_inode		*dp,
 375	void __user			*ubuf,
 376	size_t				bufsize,
 377	int				flags,
 378	struct xfs_attrlist_cursor __user *ucursor)
 379{
 380	struct xfs_attr_list_context	context = { };
 381	struct xfs_attrlist		*alist;
 382	void				*buffer;
 383	int				error;
 384
 385	if (bufsize < sizeof(struct xfs_attrlist) ||
 386	    bufsize > XFS_XATTR_LIST_MAX)
 387		return -EINVAL;
 388
 389	/*
 390	 * Reject flags, only allow namespaces.
 391	 */
 392	if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
 393		return -EINVAL;
 394	if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
 395		return -EINVAL;
 396
 397	/*
 398	 * Validate the cursor.
 399	 */
 400	if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
 401		return -EFAULT;
 402	if (context.cursor.pad1 || context.cursor.pad2)
 403		return -EINVAL;
 404	if (!context.cursor.initted &&
 405	    (context.cursor.hashval || context.cursor.blkno ||
 406	     context.cursor.offset))
 407		return -EINVAL;
 408
 409	buffer = kvzalloc(bufsize, GFP_KERNEL);
 410	if (!buffer)
 411		return -ENOMEM;
 412
 413	/*
 414	 * Initialize the output buffer.
 415	 */
 416	context.dp = dp;
 417	context.resynch = 1;
 418	context.attr_filter = xfs_attr_filter(flags);
 419	context.buffer = buffer;
 420	context.bufsize = round_down(bufsize, sizeof(uint32_t));
 421	context.firstu = context.bufsize;
 422	context.put_listent = xfs_ioc_attr_put_listent;
 423
 424	alist = context.buffer;
 425	alist->al_count = 0;
 426	alist->al_more = 0;
 427	alist->al_offset[0] = context.bufsize;
 428
 429	error = xfs_attr_list(&context);
 430	if (error)
 431		goto out_free;
 432
 433	if (copy_to_user(ubuf, buffer, bufsize) ||
 434	    copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
 435		error = -EFAULT;
 436out_free:
 437	kmem_free(buffer);
 438	return error;
 439}
 440
 441STATIC int
 442xfs_attrlist_by_handle(
 443	struct file		*parfilp,
 444	struct xfs_fsop_attrlist_handlereq __user *p)
 445{
 446	struct xfs_fsop_attrlist_handlereq al_hreq;
 447	struct dentry		*dentry;
 448	int			error = -ENOMEM;
 
 
 
 
 449
 450	if (!capable(CAP_SYS_ADMIN))
 451		return -EPERM;
 452	if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
 453		return -EFAULT;
 
 
 
 
 
 
 
 
 454
 455	dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
 456	if (IS_ERR(dentry))
 457		return PTR_ERR(dentry);
 458
 459	error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
 460				  al_hreq.buflen, al_hreq.flags, &p->pos);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 461	dput(dentry);
 462	return error;
 463}
 464
 465static int
 466xfs_attrmulti_attr_get(
 467	struct inode		*inode,
 468	unsigned char		*name,
 469	unsigned char		__user *ubuf,
 470	uint32_t		*len,
 471	uint32_t		flags)
 472{
 473	struct xfs_da_args	args = {
 474		.dp		= XFS_I(inode),
 475		.attr_filter	= xfs_attr_filter(flags),
 476		.attr_flags	= xfs_attr_flags(flags),
 477		.name		= name,
 478		.namelen	= strlen(name),
 479		.valuelen	= *len,
 480	};
 481	int			error;
 482
 483	if (*len > XFS_XATTR_SIZE_MAX)
 484		return -EINVAL;
 
 
 
 
 
 
 485
 486	error = xfs_attr_get(&args);
 487	if (error)
 488		goto out_kfree;
 489
 490	*len = args.valuelen;
 491	if (copy_to_user(ubuf, args.value, args.valuelen))
 492		error = -EFAULT;
 493
 494out_kfree:
 495	kmem_free(args.value);
 
 
 
 496	return error;
 497}
 498
 499static int
 500xfs_attrmulti_attr_set(
 501	struct inode		*inode,
 502	unsigned char		*name,
 503	const unsigned char	__user *ubuf,
 504	uint32_t		len,
 505	uint32_t		flags)
 506{
 507	struct xfs_da_args	args = {
 508		.dp		= XFS_I(inode),
 509		.attr_filter	= xfs_attr_filter(flags),
 510		.attr_flags	= xfs_attr_flags(flags),
 511		.name		= name,
 512		.namelen	= strlen(name),
 513	};
 514	int			error;
 515
 516	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 517		return -EPERM;
 
 
 
 
 
 
 518
 519	if (ubuf) {
 520		if (len > XFS_XATTR_SIZE_MAX)
 521			return -EINVAL;
 522		args.value = memdup_user(ubuf, len);
 523		if (IS_ERR(args.value))
 524			return PTR_ERR(args.value);
 525		args.valuelen = len;
 526	}
 527
 528	error = xfs_attr_change(&args);
 529	if (!error && (flags & XFS_IOC_ATTR_ROOT))
 530		xfs_forget_acl(inode, name);
 531	kfree(args.value);
 532	return error;
 533}
 534
 535int
 536xfs_ioc_attrmulti_one(
 537	struct file		*parfilp,
 538	struct inode		*inode,
 539	uint32_t		opcode,
 540	void __user		*uname,
 541	void __user		*value,
 542	uint32_t		*len,
 543	uint32_t		flags)
 544{
 545	unsigned char		*name;
 546	int			error;
 547
 548	if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
 549		return -EINVAL;
 550
 551	name = strndup_user(uname, MAXNAMELEN);
 552	if (IS_ERR(name))
 553		return PTR_ERR(name);
 554
 555	switch (opcode) {
 556	case ATTR_OP_GET:
 557		error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
 558		break;
 559	case ATTR_OP_REMOVE:
 560		value = NULL;
 561		*len = 0;
 562		fallthrough;
 563	case ATTR_OP_SET:
 564		error = mnt_want_write_file(parfilp);
 565		if (error)
 566			break;
 567		error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
 568		mnt_drop_write_file(parfilp);
 569		break;
 570	default:
 571		error = -EINVAL;
 572		break;
 573	}
 574
 575	kfree(name);
 576	return error;
 577}
 578
 579STATIC int
 580xfs_attrmulti_by_handle(
 581	struct file		*parfilp,
 582	void			__user *arg)
 583{
 584	int			error;
 585	xfs_attr_multiop_t	*ops;
 586	xfs_fsop_attrmulti_handlereq_t am_hreq;
 587	struct dentry		*dentry;
 588	unsigned int		i, size;
 
 589
 590	if (!capable(CAP_SYS_ADMIN))
 591		return -EPERM;
 592	if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
 593		return -EFAULT;
 594
 595	/* overflow check */
 596	if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
 597		return -E2BIG;
 598
 599	dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
 600	if (IS_ERR(dentry))
 601		return PTR_ERR(dentry);
 602
 603	error = -E2BIG;
 604	size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
 605	if (!size || size > 16 * PAGE_SIZE)
 606		goto out_dput;
 607
 608	ops = memdup_user(am_hreq.ops, size);
 609	if (IS_ERR(ops)) {
 610		error = PTR_ERR(ops);
 611		goto out_dput;
 612	}
 613
 
 
 
 
 614	error = 0;
 615	for (i = 0; i < am_hreq.opcount; i++) {
 616		ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
 617				d_inode(dentry), ops[i].am_opcode,
 618				ops[i].am_attrname, ops[i].am_attrvalue,
 619				&ops[i].am_length, ops[i].am_flags);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 620	}
 621
 622	if (copy_to_user(am_hreq.ops, ops, size))
 623		error = -EFAULT;
 624
 
 
 625	kfree(ops);
 626 out_dput:
 627	dput(dentry);
 628	return error;
 629}
 630
 631/* Return 0 on success or positive error */
 632int
 633xfs_fsbulkstat_one_fmt(
 634	struct xfs_ibulk		*breq,
 635	const struct xfs_bulkstat	*bstat)
 
 
 
 
 636{
 637	struct xfs_bstat		bs1;
 
 638
 639	xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
 640	if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
 641		return -EFAULT;
 642	return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
 643}
 
 
 644
 645int
 646xfs_fsinumbers_fmt(
 647	struct xfs_ibulk		*breq,
 648	const struct xfs_inumbers	*igrp)
 649{
 650	struct xfs_inogrp		ig1;
 651
 652	xfs_inumbers_to_inogrp(&ig1, igrp);
 653	if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
 654		return -EFAULT;
 655	return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
 
 
 
 
 
 
 
 
 
 
 
 
 
 656}
 657
 658STATIC int
 659xfs_ioc_fsbulkstat(
 660	struct file		*file,
 661	unsigned int		cmd,
 662	void			__user *arg)
 663{
 664	struct xfs_mount	*mp = XFS_I(file_inode(file))->i_mount;
 665	struct xfs_fsop_bulkreq	bulkreq;
 666	struct xfs_ibulk	breq = {
 667		.mp		= mp,
 668		.mnt_userns	= file_mnt_user_ns(file),
 669		.ocount		= 0,
 670	};
 671	xfs_ino_t		lastino;
 672	int			error;
 673
 674	/* done = 1 if there are more stats to get and if bulkstat */
 675	/* should be called again (unused here, but used in dmapi) */
 676
 677	if (!capable(CAP_SYS_ADMIN))
 678		return -EPERM;
 679
 680	if (xfs_is_shutdown(mp))
 681		return -EIO;
 682
 683	if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
 684		return -EFAULT;
 685
 686	if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
 687		return -EFAULT;
 688
 689	if (bulkreq.icount <= 0)
 690		return -EINVAL;
 691
 692	if (bulkreq.ubuffer == NULL)
 693		return -EINVAL;
 694
 695	breq.ubuffer = bulkreq.ubuffer;
 696	breq.icount = bulkreq.icount;
 697
 698	/*
 699	 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
 700	 * that we want to stat.  However, FSINUMBERS and FSBULKSTAT expect
 701	 * that *lastip contains either zero or the number of the last inode to
 702	 * be examined by the previous call and return results starting with
 703	 * the next inode after that.  The new bulk request back end functions
 704	 * take the inode to start with, so we have to compute the startino
 705	 * parameter from lastino to maintain correct function.  lastino == 0
 706	 * is a special case because it has traditionally meant "first inode
 707	 * in filesystem".
 708	 */
 709	if (cmd == XFS_IOC_FSINUMBERS) {
 710		breq.startino = lastino ? lastino + 1 : 0;
 711		error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
 712		lastino = breq.startino - 1;
 713	} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
 714		breq.startino = lastino;
 715		breq.icount = 1;
 716		error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
 717	} else {	/* XFS_IOC_FSBULKSTAT */
 718		breq.startino = lastino ? lastino + 1 : 0;
 719		error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
 720		lastino = breq.startino - 1;
 721	}
 722
 723	if (error)
 724		return error;
 725
 726	if (bulkreq.lastip != NULL &&
 727	    copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
 728		return -EFAULT;
 729
 730	if (bulkreq.ocount != NULL &&
 731	    copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
 732		return -EFAULT;
 733
 734	return 0;
 735}
 736
 737/* Return 0 on success or positive error */
 738static int
 739xfs_bulkstat_fmt(
 740	struct xfs_ibulk		*breq,
 741	const struct xfs_bulkstat	*bstat)
 742{
 743	if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
 744		return -EFAULT;
 745	return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
 746}
 747
 748/*
 749 * Check the incoming bulk request @hdr from userspace and initialize the
 750 * internal @breq bulk request appropriately.  Returns 0 if the bulk request
 751 * should proceed; -ECANCELED if there's nothing to do; or the usual
 752 * negative error code.
 753 */
 754static int
 755xfs_bulk_ireq_setup(
 756	struct xfs_mount	*mp,
 757	const struct xfs_bulk_ireq *hdr,
 758	struct xfs_ibulk	*breq,
 759	void __user		*ubuffer)
 760{
 761	if (hdr->icount == 0 ||
 762	    (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
 763	    memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
 764		return -EINVAL;
 765
 766	breq->startino = hdr->ino;
 767	breq->ubuffer = ubuffer;
 768	breq->icount = hdr->icount;
 769	breq->ocount = 0;
 770	breq->flags = 0;
 771
 772	/*
 773	 * The @ino parameter is a special value, so we must look it up here.
 774	 * We're not allowed to have IREQ_AGNO, and we only return one inode
 775	 * worth of data.
 776	 */
 777	if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
 778		if (hdr->flags & XFS_BULK_IREQ_AGNO)
 779			return -EINVAL;
 780
 781		switch (hdr->ino) {
 782		case XFS_BULK_IREQ_SPECIAL_ROOT:
 783			breq->startino = mp->m_sb.sb_rootino;
 784			break;
 785		default:
 786			return -EINVAL;
 787		}
 788		breq->icount = 1;
 789	}
 790
 791	/*
 792	 * The IREQ_AGNO flag means that we only want results from a given AG.
 793	 * If @hdr->ino is zero, we start iterating in that AG.  If @hdr->ino is
 794	 * beyond the specified AG then we return no results.
 795	 */
 796	if (hdr->flags & XFS_BULK_IREQ_AGNO) {
 797		if (hdr->agno >= mp->m_sb.sb_agcount)
 798			return -EINVAL;
 799
 800		if (breq->startino == 0)
 801			breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
 802		else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
 803			return -EINVAL;
 804
 805		breq->flags |= XFS_IBULK_SAME_AG;
 806
 807		/* Asking for an inode past the end of the AG?  We're done! */
 808		if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
 809			return -ECANCELED;
 810	} else if (hdr->agno)
 811		return -EINVAL;
 812
 813	/* Asking for an inode past the end of the FS?  We're done! */
 814	if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
 815		return -ECANCELED;
 816
 817	if (hdr->flags & XFS_BULK_IREQ_NREXT64)
 818		breq->flags |= XFS_IBULK_NREXT64;
 819
 820	return 0;
 821}
 822
 823/*
 824 * Update the userspace bulk request @hdr to reflect the end state of the
 825 * internal bulk request @breq.
 826 */
 827static void
 828xfs_bulk_ireq_teardown(
 829	struct xfs_bulk_ireq	*hdr,
 830	struct xfs_ibulk	*breq)
 831{
 832	hdr->ino = breq->startino;
 833	hdr->ocount = breq->ocount;
 834}
 835
 836/* Handle the v5 bulkstat ioctl. */
 837STATIC int
 838xfs_ioc_bulkstat(
 839	struct file			*file,
 840	unsigned int			cmd,
 841	struct xfs_bulkstat_req __user	*arg)
 842{
 843	struct xfs_mount		*mp = XFS_I(file_inode(file))->i_mount;
 844	struct xfs_bulk_ireq		hdr;
 845	struct xfs_ibulk		breq = {
 846		.mp			= mp,
 847		.mnt_userns		= file_mnt_user_ns(file),
 848	};
 849	int				error;
 850
 851	if (!capable(CAP_SYS_ADMIN))
 852		return -EPERM;
 853
 854	if (xfs_is_shutdown(mp))
 855		return -EIO;
 856
 857	if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
 858		return -EFAULT;
 859
 860	error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
 861	if (error == -ECANCELED)
 862		goto out_teardown;
 863	if (error < 0)
 864		return error;
 865
 866	error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
 867	if (error)
 868		return error;
 869
 870out_teardown:
 871	xfs_bulk_ireq_teardown(&hdr, &breq);
 872	if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
 873		return -EFAULT;
 874
 875	return 0;
 876}
 877
 878STATIC int
 879xfs_inumbers_fmt(
 880	struct xfs_ibulk		*breq,
 881	const struct xfs_inumbers	*igrp)
 882{
 883	if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
 884		return -EFAULT;
 885	return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
 886}
 887
 888/* Handle the v5 inumbers ioctl. */
 889STATIC int
 890xfs_ioc_inumbers(
 891	struct xfs_mount		*mp,
 892	unsigned int			cmd,
 893	struct xfs_inumbers_req __user	*arg)
 894{
 895	struct xfs_bulk_ireq		hdr;
 896	struct xfs_ibulk		breq = {
 897		.mp			= mp,
 898	};
 899	int				error;
 900
 901	if (!capable(CAP_SYS_ADMIN))
 902		return -EPERM;
 903
 904	if (xfs_is_shutdown(mp))
 905		return -EIO;
 906
 907	if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
 908		return -EFAULT;
 909
 910	error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
 911	if (error == -ECANCELED)
 912		goto out_teardown;
 913	if (error < 0)
 914		return error;
 915
 916	error = xfs_inumbers(&breq, xfs_inumbers_fmt);
 917	if (error)
 918		return error;
 919
 920out_teardown:
 921	xfs_bulk_ireq_teardown(&hdr, &breq);
 922	if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
 923		return -EFAULT;
 924
 
 
 
 
 
 
 
 925	return 0;
 926}
 927
 928STATIC int
 929xfs_ioc_fsgeometry(
 930	struct xfs_mount	*mp,
 931	void			__user *arg,
 932	int			struct_version)
 933{
 934	struct xfs_fsop_geom	fsgeo;
 935	size_t			len;
 936
 937	xfs_fs_geometry(mp, &fsgeo, struct_version);
 938
 939	if (struct_version <= 3)
 940		len = sizeof(struct xfs_fsop_geom_v1);
 941	else if (struct_version == 4)
 942		len = sizeof(struct xfs_fsop_geom_v4);
 943	else {
 944		xfs_fsop_geom_health(mp, &fsgeo);
 945		len = sizeof(fsgeo);
 946	}
 947
 948	if (copy_to_user(arg, &fsgeo, len))
 949		return -EFAULT;
 950	return 0;
 951}
 952
 953STATIC int
 954xfs_ioc_ag_geometry(
 955	struct xfs_mount	*mp,
 956	void			__user *arg)
 957{
 958	struct xfs_perag	*pag;
 959	struct xfs_ag_geometry	ageo;
 960	int			error;
 961
 962	if (copy_from_user(&ageo, arg, sizeof(ageo)))
 963		return -EFAULT;
 964	if (ageo.ag_flags)
 965		return -EINVAL;
 966	if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
 967		return -EINVAL;
 968
 969	pag = xfs_perag_get(mp, ageo.ag_number);
 970	if (!pag)
 971		return -EINVAL;
 972
 973	error = xfs_ag_get_geometry(pag, &ageo);
 974	xfs_perag_put(pag);
 975	if (error)
 976		return error;
 977
 978	if (copy_to_user(arg, &ageo, sizeof(ageo)))
 979		return -EFAULT;
 980	return 0;
 981}
 982
 983/*
 984 * Linux extended inode flags interface.
 985 */
 986
 987static void
 988xfs_fill_fsxattr(
 989	struct xfs_inode	*ip,
 990	int			whichfork,
 991	struct fileattr		*fa)
 992{
 993	struct xfs_mount	*mp = ip->i_mount;
 994	struct xfs_ifork	*ifp = xfs_ifork_ptr(ip, whichfork);
 995
 996	fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 997
 998	if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
 999		fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1000	} else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1001		/*
1002		 * Don't let a misaligned extent size hint on a directory
1003		 * escape to userspace if it won't pass the setattr checks
1004		 * later.
1005		 */
1006		if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1007		    ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
1008			fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1009					    FS_XFLAG_EXTSZINHERIT);
1010			fa->fsx_extsize = 0;
1011		} else {
1012			fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1013		}
1014	}
1015
1016	if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1017		fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1018	fa->fsx_projid = ip->i_projid;
1019	if (ifp && !xfs_need_iread_extents(ifp))
1020		fa->fsx_nextents = xfs_iext_count(ifp);
1021	else
1022		fa->fsx_nextents = xfs_ifork_nextents(ifp);
 
 
 
 
 
 
 
 
 
 
1023}
1024
1025STATIC int
1026xfs_ioc_fsgetxattra(
1027	xfs_inode_t		*ip,
 
1028	void			__user *arg)
1029{
1030	struct fileattr		fa;
1031
1032	xfs_ilock(ip, XFS_ILOCK_SHARED);
1033	xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1034	xfs_iunlock(ip, XFS_ILOCK_SHARED);
1035
1036	return copy_fsxattr_to_user(&fa, arg);
1037}
1038
1039int
1040xfs_fileattr_get(
1041	struct dentry		*dentry,
1042	struct fileattr		*fa)
1043{
1044	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
1045
1046	if (d_is_special(dentry))
1047		return -ENOTTY;
1048
1049	xfs_ilock(ip, XFS_ILOCK_SHARED);
1050	xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1051	xfs_iunlock(ip, XFS_ILOCK_SHARED);
1052
 
 
1053	return 0;
1054}
1055
1056STATIC uint16_t
1057xfs_flags2diflags(
1058	struct xfs_inode	*ip,
1059	unsigned int		xflags)
1060{
1061	/* can't set PREALLOC this way, just preserve it */
1062	uint16_t		di_flags =
1063		(ip->i_diflags & XFS_DIFLAG_PREALLOC);
1064
1065	if (xflags & FS_XFLAG_IMMUTABLE)
 
 
1066		di_flags |= XFS_DIFLAG_IMMUTABLE;
1067	if (xflags & FS_XFLAG_APPEND)
1068		di_flags |= XFS_DIFLAG_APPEND;
1069	if (xflags & FS_XFLAG_SYNC)
1070		di_flags |= XFS_DIFLAG_SYNC;
1071	if (xflags & FS_XFLAG_NOATIME)
1072		di_flags |= XFS_DIFLAG_NOATIME;
1073	if (xflags & FS_XFLAG_NODUMP)
1074		di_flags |= XFS_DIFLAG_NODUMP;
1075	if (xflags & FS_XFLAG_NODEFRAG)
 
 
1076		di_flags |= XFS_DIFLAG_NODEFRAG;
1077	if (xflags & FS_XFLAG_FILESTREAM)
1078		di_flags |= XFS_DIFLAG_FILESTREAM;
1079	if (S_ISDIR(VFS_I(ip)->i_mode)) {
1080		if (xflags & FS_XFLAG_RTINHERIT)
1081			di_flags |= XFS_DIFLAG_RTINHERIT;
1082		if (xflags & FS_XFLAG_NOSYMLINKS)
1083			di_flags |= XFS_DIFLAG_NOSYMLINKS;
1084		if (xflags & FS_XFLAG_EXTSZINHERIT)
1085			di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1086		if (xflags & FS_XFLAG_PROJINHERIT)
1087			di_flags |= XFS_DIFLAG_PROJINHERIT;
1088	} else if (S_ISREG(VFS_I(ip)->i_mode)) {
1089		if (xflags & FS_XFLAG_REALTIME)
1090			di_flags |= XFS_DIFLAG_REALTIME;
1091		if (xflags & FS_XFLAG_EXTSIZE)
1092			di_flags |= XFS_DIFLAG_EXTSIZE;
1093	}
1094
1095	return di_flags;
1096}
1097
1098STATIC uint64_t
1099xfs_flags2diflags2(
1100	struct xfs_inode	*ip,
1101	unsigned int		xflags)
1102{
1103	uint64_t		di_flags2 =
1104		(ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1105				   XFS_DIFLAG2_BIGTIME |
1106				   XFS_DIFLAG2_NREXT64));
1107
1108	if (xflags & FS_XFLAG_DAX)
1109		di_flags2 |= XFS_DIFLAG2_DAX;
1110	if (xflags & FS_XFLAG_COWEXTSIZE)
1111		di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1112
1113	return di_flags2;
1114}
1115
1116static int
1117xfs_ioctl_setattr_xflags(
1118	struct xfs_trans	*tp,
1119	struct xfs_inode	*ip,
1120	struct fileattr		*fa)
1121{
1122	struct xfs_mount	*mp = ip->i_mount;
1123	uint64_t		i_flags2;
1124
1125	/* Can't change realtime flag if any extents are allocated. */
1126	if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1127	    XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1128		return -EINVAL;
1129
1130	/* If realtime flag is set then must have realtime device */
1131	if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1132		if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1133		    (ip->i_extsize % mp->m_sb.sb_rextsize))
1134			return -EINVAL;
1135	}
1136
1137	/* Clear reflink if we are actually able to set the rt flag. */
1138	if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1139		ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1140
1141	/* diflags2 only valid for v3 inodes. */
1142	i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1143	if (i_flags2 && !xfs_has_v3inodes(mp))
1144		return -EINVAL;
1145
1146	ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1147	ip->i_diflags2 = i_flags2;
1148
1149	xfs_diflags_to_iflags(ip, false);
1150	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1151	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1152	XFS_STATS_INC(mp, xs_ig_attrchg);
1153	return 0;
1154}
1155
1156static void
1157xfs_ioctl_setattr_prepare_dax(
1158	struct xfs_inode	*ip,
1159	struct fileattr		*fa)
1160{
1161	struct xfs_mount	*mp = ip->i_mount;
1162	struct inode            *inode = VFS_I(ip);
1163
1164	if (S_ISDIR(inode->i_mode))
1165		return;
1166
1167	if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
1168		return;
1169
1170	if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1171	    !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1172	    (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1173	     (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1174		d_mark_dontcache(inode);
1175}
1176
1177/*
1178 * Set up the transaction structure for the setattr operation, checking that we
1179 * have permission to do so. On success, return a clean transaction and the
1180 * inode locked exclusively ready for further operation specific checks. On
1181 * failure, return an error without modifying or locking the inode.
1182 */
1183static struct xfs_trans *
1184xfs_ioctl_setattr_get_trans(
1185	struct xfs_inode	*ip,
1186	struct xfs_dquot	*pdqp)
1187{
1188	struct xfs_mount	*mp = ip->i_mount;
1189	struct xfs_trans	*tp;
1190	int			error = -EROFS;
1191
1192	if (xfs_is_readonly(mp))
1193		goto out_error;
1194	error = -EIO;
1195	if (xfs_is_shutdown(mp))
1196		goto out_error;
1197
1198	error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1199			has_capability_noaudit(current, CAP_FOWNER), &tp);
1200	if (error)
1201		goto out_error;
1202
1203	if (xfs_has_wsync(mp))
1204		xfs_trans_set_sync(tp);
1205
1206	return tp;
1207
1208out_error:
1209	return ERR_PTR(error);
1210}
1211
1212/*
1213 * Validate a proposed extent size hint.  For regular files, the hint can only
1214 * be changed if no extents are allocated.
1215 */
1216static int
1217xfs_ioctl_setattr_check_extsize(
1218	struct xfs_inode	*ip,
1219	struct fileattr		*fa)
1220{
1221	struct xfs_mount	*mp = ip->i_mount;
1222	xfs_failaddr_t		failaddr;
1223	uint16_t		new_diflags;
1224
1225	if (!fa->fsx_valid)
1226		return 0;
1227
1228	if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1229	    XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1230		return -EINVAL;
1231
1232	if (fa->fsx_extsize & mp->m_blockmask)
1233		return -EINVAL;
1234
1235	new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1236
1237	/*
1238	 * Inode verifiers do not check that the extent size hint is an integer
1239	 * multiple of the rt extent size on a directory with both rtinherit
1240	 * and extszinherit flags set.  Don't let sysadmins misconfigure
1241	 * directories.
1242	 */
1243	if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1244	    (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1245		unsigned int	rtextsize_bytes;
1246
1247		rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1248		if (fa->fsx_extsize % rtextsize_bytes)
1249			return -EINVAL;
1250	}
1251
1252	failaddr = xfs_inode_validate_extsize(ip->i_mount,
1253			XFS_B_TO_FSB(mp, fa->fsx_extsize),
1254			VFS_I(ip)->i_mode, new_diflags);
1255	return failaddr != NULL ? -EINVAL : 0;
1256}
1257
1258static int
1259xfs_ioctl_setattr_check_cowextsize(
1260	struct xfs_inode	*ip,
1261	struct fileattr		*fa)
1262{
1263	struct xfs_mount	*mp = ip->i_mount;
1264	xfs_failaddr_t		failaddr;
1265	uint64_t		new_diflags2;
1266	uint16_t		new_diflags;
1267
1268	if (!fa->fsx_valid)
1269		return 0;
1270
1271	if (fa->fsx_cowextsize & mp->m_blockmask)
1272		return -EINVAL;
1273
1274	new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1275	new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1276
1277	failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1278			XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1279			VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1280	return failaddr != NULL ? -EINVAL : 0;
 
 
 
 
 
 
1281}
1282
1283static int
1284xfs_ioctl_setattr_check_projid(
1285	struct xfs_inode	*ip,
1286	struct fileattr		*fa)
1287{
1288	if (!fa->fsx_valid)
1289		return 0;
1290
1291	/* Disallow 32bit project ids if 32bit IDs are not enabled. */
1292	if (fa->fsx_projid > (uint16_t)-1 &&
1293	    !xfs_has_projid32(ip->i_mount))
1294		return -EINVAL;
1295	return 0;
1296}
1297
1298int
1299xfs_fileattr_set(
1300	struct user_namespace	*mnt_userns,
1301	struct dentry		*dentry,
1302	struct fileattr		*fa)
1303{
1304	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
1305	struct xfs_mount	*mp = ip->i_mount;
1306	struct xfs_trans	*tp;
1307	struct xfs_dquot	*pdqp = NULL;
 
 
1308	struct xfs_dquot	*olddquot = NULL;
1309	int			error;
1310
1311	trace_xfs_ioctl_setattr(ip);
1312
1313	if (d_is_special(dentry))
1314		return -ENOTTY;
 
 
1315
1316	if (!fa->fsx_valid) {
1317		if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1318				  FS_NOATIME_FL | FS_NODUMP_FL |
1319				  FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1320			return -EOPNOTSUPP;
1321	}
1322
1323	error = xfs_ioctl_setattr_check_projid(ip, fa);
1324	if (error)
1325		return error;
1326
1327	/*
1328	 * If disk quotas is on, we make sure that the dquots do exist on disk,
1329	 * before we start any other transactions. Trying to do this later
1330	 * is messy. We don't care to take a readlock to look at the ids
1331	 * in inode here, because we can't hold it across the trans_reserve.
1332	 * If the IDs do change before we take the ilock, we're covered
1333	 * because the i_*dquot fields will get updated anyway.
1334	 */
1335	if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1336		error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1337				VFS_I(ip)->i_gid, fa->fsx_projid,
1338				XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1339		if (error)
1340			return error;
1341	}
1342
1343	xfs_ioctl_setattr_prepare_dax(ip, fa);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1344
1345	tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1346	if (IS_ERR(tp)) {
1347		error = PTR_ERR(tp);
1348		goto error_free_dquots;
 
 
 
 
 
 
 
 
 
 
1349	}
1350
1351	error = xfs_ioctl_setattr_check_extsize(ip, fa);
1352	if (error)
1353		goto error_trans_cancel;
 
 
 
 
 
 
 
1354
1355	error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1356	if (error)
1357		goto error_trans_cancel;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1358
1359	error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1360	if (error)
1361		goto error_trans_cancel;
1362
1363	if (!fa->fsx_valid)
1364		goto skip_xattr;
1365	/*
1366	 * Change file ownership.  Must be the owner or privileged.  CAP_FSETID
1367	 * overrides the following restrictions:
1368	 *
1369	 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1370	 * successful return from chown()
1371	 */
 
1372
1373	if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1374	    !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID))
1375		VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1376
1377	/* Change the ownerships and register project quota modifications */
1378	if (ip->i_projid != fa->fsx_projid) {
1379		if (XFS_IS_PQUOTA_ON(mp)) {
1380			olddquot = xfs_qm_vop_chown(tp, ip,
1381						&ip->i_pdquot, pdqp);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1382		}
1383		ip->i_projid = fa->fsx_projid;
1384	}
1385
 
 
1386	/*
1387	 * Only set the extent size hint if we've already determined that the
1388	 * extent size hint should be set on the inode. If no extent size flags
1389	 * are set on the inode then unconditionally clear the extent size hint.
1390	 */
1391	if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1392		ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1393	else
1394		ip->i_extsize = 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1395
1396	if (xfs_has_v3inodes(mp)) {
1397		if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1398			ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1399		else
1400			ip->i_cowextsize = 0;
1401	}
1402
1403skip_xattr:
1404	error = xfs_trans_commit(tp);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1405
1406	/*
1407	 * Release any dquot(s) the inode had kept before chown.
1408	 */
1409	xfs_qm_dqrele(olddquot);
1410	xfs_qm_dqrele(pdqp);
1411
1412	return error;
1413
1414error_trans_cancel:
1415	xfs_trans_cancel(tp);
1416error_free_dquots:
1417	xfs_qm_dqrele(pdqp);
1418	return error;
1419}
1420
1421static bool
1422xfs_getbmap_format(
1423	struct kgetbmap		*p,
1424	struct getbmapx __user	*u,
1425	size_t			recsize)
1426{
1427	if (put_user(p->bmv_offset, &u->bmv_offset) ||
1428	    put_user(p->bmv_block, &u->bmv_block) ||
1429	    put_user(p->bmv_length, &u->bmv_length) ||
1430	    put_user(0, &u->bmv_count) ||
1431	    put_user(0, &u->bmv_entries))
1432		return false;
1433	if (recsize < sizeof(struct getbmapx))
1434		return true;
1435	if (put_user(0, &u->bmv_iflags) ||
1436	    put_user(p->bmv_oflags, &u->bmv_oflags) ||
1437	    put_user(0, &u->bmv_unused1) ||
1438	    put_user(0, &u->bmv_unused2))
1439		return false;
1440	return true;
1441}
1442
1443STATIC int
1444xfs_ioc_getbmap(
1445	struct file		*file,
1446	unsigned int		cmd,
1447	void			__user *arg)
1448{
1449	struct getbmapx		bmx = { 0 };
1450	struct kgetbmap		*buf;
1451	size_t			recsize;
1452	int			error, i;
1453
1454	switch (cmd) {
1455	case XFS_IOC_GETBMAPA:
1456		bmx.bmv_iflags = BMV_IF_ATTRFORK;
1457		fallthrough;
1458	case XFS_IOC_GETBMAP:
1459		/* struct getbmap is a strict subset of struct getbmapx. */
1460		recsize = sizeof(struct getbmap);
1461		break;
1462	case XFS_IOC_GETBMAPX:
1463		recsize = sizeof(struct getbmapx);
1464		break;
1465	default:
1466		return -EINVAL;
1467	}
1468
1469	if (copy_from_user(&bmx, arg, recsize))
1470		return -EFAULT;
1471
1472	if (bmx.bmv_count < 2)
1473		return -EINVAL;
1474	if (bmx.bmv_count >= INT_MAX / recsize)
1475		return -ENOMEM;
1476
1477	buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
1478	if (!buf)
1479		return -ENOMEM;
1480
1481	error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1482	if (error)
1483		goto out_free_buf;
1484
1485	error = -EFAULT;
1486	if (copy_to_user(arg, &bmx, recsize))
1487		goto out_free_buf;
1488	arg += recsize;
1489
1490	for (i = 0; i < bmx.bmv_entries; i++) {
1491		if (!xfs_getbmap_format(buf + i, arg, recsize))
1492			goto out_free_buf;
1493		arg += recsize;
1494	}
1495
1496	error = 0;
1497out_free_buf:
1498	kmem_free(buf);
1499	return error;
1500}
1501
1502STATIC int
1503xfs_ioc_getfsmap(
1504	struct xfs_inode	*ip,
1505	struct fsmap_head	__user *arg)
1506{
1507	struct xfs_fsmap_head	xhead = {0};
1508	struct fsmap_head	head;
1509	struct fsmap		*recs;
1510	unsigned int		count;
1511	__u32			last_flags = 0;
1512	bool			done = false;
1513	int			error;
1514
1515	if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
 
1516		return -EFAULT;
1517	if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1518	    memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1519		       sizeof(head.fmh_keys[0].fmr_reserved)) ||
1520	    memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1521		       sizeof(head.fmh_keys[1].fmr_reserved)))
1522		return -EINVAL;
1523
1524	/*
1525	 * Use an internal memory buffer so that we don't have to copy fsmap
1526	 * data to userspace while holding locks.  Start by trying to allocate
1527	 * up to 128k for the buffer, but fall back to a single page if needed.
1528	 */
1529	count = min_t(unsigned int, head.fmh_count,
1530			131072 / sizeof(struct fsmap));
1531	recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1532	if (!recs) {
1533		count = min_t(unsigned int, head.fmh_count,
1534				PAGE_SIZE / sizeof(struct fsmap));
1535		recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1536		if (!recs)
1537			return -ENOMEM;
1538	}
1539
1540	xhead.fmh_iflags = head.fmh_iflags;
1541	xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1542	xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1543
1544	trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1545	trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1546
1547	head.fmh_entries = 0;
1548	do {
1549		struct fsmap __user	*user_recs;
1550		struct fsmap		*last_rec;
1551
1552		user_recs = &arg->fmh_recs[head.fmh_entries];
1553		xhead.fmh_entries = 0;
1554		xhead.fmh_count = min_t(unsigned int, count,
1555					head.fmh_count - head.fmh_entries);
1556
1557		/* Run query, record how many entries we got. */
1558		error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1559		switch (error) {
1560		case 0:
1561			/*
1562			 * There are no more records in the result set.  Copy
1563			 * whatever we got to userspace and break out.
1564			 */
1565			done = true;
1566			break;
1567		case -ECANCELED:
1568			/*
1569			 * The internal memory buffer is full.  Copy whatever
1570			 * records we got to userspace and go again if we have
1571			 * not yet filled the userspace buffer.
1572			 */
1573			error = 0;
1574			break;
1575		default:
1576			goto out_free;
1577		}
1578		head.fmh_entries += xhead.fmh_entries;
1579		head.fmh_oflags = xhead.fmh_oflags;
1580
1581		/*
1582		 * If the caller wanted a record count or there aren't any
1583		 * new records to return, we're done.
1584		 */
1585		if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1586			break;
1587
1588		/* Copy all the records we got out to userspace. */
1589		if (copy_to_user(user_recs, recs,
1590				 xhead.fmh_entries * sizeof(struct fsmap))) {
1591			error = -EFAULT;
1592			goto out_free;
1593		}
1594
1595		/* Remember the last record flags we copied to userspace. */
1596		last_rec = &recs[xhead.fmh_entries - 1];
1597		last_flags = last_rec->fmr_flags;
1598
1599		/* Set up the low key for the next iteration. */
1600		xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1601		trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1602	} while (!done && head.fmh_entries < head.fmh_count);
1603
1604	/*
1605	 * If there are no more records in the query result set and we're not
1606	 * in counting mode, mark the last record returned with the LAST flag.
1607	 */
1608	if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1609		struct fsmap __user	*user_rec;
1610
1611		last_flags |= FMR_OF_LAST;
1612		user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1613
1614		if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1615					sizeof(last_flags))) {
1616			error = -EFAULT;
1617			goto out_free;
1618		}
1619	}
1620
1621	/* copy back header */
1622	if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1623		error = -EFAULT;
1624		goto out_free;
1625	}
1626
1627out_free:
1628	kmem_free(recs);
1629	return error;
1630}
1631
1632STATIC int
1633xfs_ioc_scrub_metadata(
1634	struct file			*file,
1635	void				__user *arg)
 
1636{
1637	struct xfs_scrub_metadata	scrub;
1638	int				error;
 
1639
1640	if (!capable(CAP_SYS_ADMIN))
1641		return -EPERM;
1642
1643	if (copy_from_user(&scrub, arg, sizeof(scrub)))
1644		return -EFAULT;
1645
1646	error = xfs_scrub_metadata(file, &scrub);
1647	if (error)
1648		return error;
 
1649
1650	if (copy_to_user(arg, &scrub, sizeof(scrub)))
1651		return -EFAULT;
 
 
1652
1653	return 0;
1654}
1655
1656int
1657xfs_ioc_swapext(
1658	xfs_swapext_t	*sxp)
1659{
1660	xfs_inode_t     *ip, *tip;
1661	struct fd	f, tmp;
1662	int		error = 0;
1663
1664	/* Pull information for the target fd */
1665	f = fdget((int)sxp->sx_fdtarget);
1666	if (!f.file) {
1667		error = -EINVAL;
1668		goto out;
1669	}
1670
1671	if (!(f.file->f_mode & FMODE_WRITE) ||
1672	    !(f.file->f_mode & FMODE_READ) ||
1673	    (f.file->f_flags & O_APPEND)) {
1674		error = -EBADF;
1675		goto out_put_file;
1676	}
1677
1678	tmp = fdget((int)sxp->sx_fdtmp);
1679	if (!tmp.file) {
1680		error = -EINVAL;
1681		goto out_put_file;
1682	}
1683
1684	if (!(tmp.file->f_mode & FMODE_WRITE) ||
1685	    !(tmp.file->f_mode & FMODE_READ) ||
1686	    (tmp.file->f_flags & O_APPEND)) {
1687		error = -EBADF;
1688		goto out_put_tmp_file;
1689	}
1690
1691	if (IS_SWAPFILE(file_inode(f.file)) ||
1692	    IS_SWAPFILE(file_inode(tmp.file))) {
1693		error = -EINVAL;
1694		goto out_put_tmp_file;
1695	}
1696
1697	/*
1698	 * We need to ensure that the fds passed in point to XFS inodes
1699	 * before we cast and access them as XFS structures as we have no
1700	 * control over what the user passes us here.
1701	 */
1702	if (f.file->f_op != &xfs_file_operations ||
1703	    tmp.file->f_op != &xfs_file_operations) {
1704		error = -EINVAL;
1705		goto out_put_tmp_file;
1706	}
1707
1708	ip = XFS_I(file_inode(f.file));
1709	tip = XFS_I(file_inode(tmp.file));
 
 
 
 
 
 
 
1710
1711	if (ip->i_mount != tip->i_mount) {
1712		error = -EINVAL;
1713		goto out_put_tmp_file;
1714	}
1715
1716	if (ip->i_ino == tip->i_ino) {
1717		error = -EINVAL;
1718		goto out_put_tmp_file;
1719	}
1720
1721	if (xfs_is_shutdown(ip->i_mount)) {
1722		error = -EIO;
1723		goto out_put_tmp_file;
1724	}
1725
1726	error = xfs_swap_extents(ip, tip, sxp);
 
 
 
1727
1728 out_put_tmp_file:
1729	fdput(tmp);
1730 out_put_file:
1731	fdput(f);
1732 out:
1733	return error;
1734}
1735
1736static int
1737xfs_ioc_getlabel(
1738	struct xfs_mount	*mp,
1739	char			__user *user_label)
1740{
1741	struct xfs_sb		*sbp = &mp->m_sb;
1742	char			label[XFSLABEL_MAX + 1];
1743
1744	/* Paranoia */
1745	BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1746
1747	/* 1 larger than sb_fname, so this ensures a trailing NUL char */
1748	memset(label, 0, sizeof(label));
1749	spin_lock(&mp->m_sb_lock);
1750	strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1751	spin_unlock(&mp->m_sb_lock);
1752
1753	if (copy_to_user(user_label, label, sizeof(label)))
1754		return -EFAULT;
 
 
1755	return 0;
1756}
1757
1758static int
1759xfs_ioc_setlabel(
1760	struct file		*filp,
1761	struct xfs_mount	*mp,
1762	char			__user *newlabel)
1763{
1764	struct xfs_sb		*sbp = &mp->m_sb;
1765	char			label[XFSLABEL_MAX + 1];
1766	size_t			len;
1767	int			error;
1768
1769	if (!capable(CAP_SYS_ADMIN))
1770		return -EPERM;
1771	/*
1772	 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1773	 * smaller, at 12 bytes.  We copy one more to be sure we find the
1774	 * (required) NULL character to test the incoming label length.
1775	 * NB: The on disk label doesn't need to be null terminated.
1776	 */
1777	if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1778		return -EFAULT;
1779	len = strnlen(label, XFSLABEL_MAX + 1);
1780	if (len > sizeof(sbp->sb_fname))
1781		return -EINVAL;
1782
1783	error = mnt_want_write_file(filp);
1784	if (error)
1785		return error;
1786
1787	spin_lock(&mp->m_sb_lock);
1788	memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1789	memcpy(sbp->sb_fname, label, len);
1790	spin_unlock(&mp->m_sb_lock);
1791
1792	/*
1793	 * Now we do several things to satisfy userspace.
1794	 * In addition to normal logging of the primary superblock, we also
1795	 * immediately write these changes to sector zero for the primary, then
1796	 * update all backup supers (as xfs_db does for a label change), then
1797	 * invalidate the block device page cache.  This is so that any prior
1798	 * buffered reads from userspace (i.e. from blkid) are invalidated,
1799	 * and userspace will see the newly-written label.
1800	 */
1801	error = xfs_sync_sb_buf(mp);
1802	if (error)
1803		goto out;
1804	/*
1805	 * growfs also updates backup supers so lock against that.
1806	 */
1807	mutex_lock(&mp->m_growlock);
1808	error = xfs_update_secondary_sbs(mp);
1809	mutex_unlock(&mp->m_growlock);
1810
1811	invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1812
1813out:
1814	mnt_drop_write_file(filp);
1815	return error;
1816}
1817
1818static inline int
1819xfs_fs_eofblocks_from_user(
1820	struct xfs_fs_eofblocks		*src,
1821	struct xfs_icwalk		*dst)
1822{
1823	if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1824		return -EINVAL;
1825
1826	if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1827		return -EINVAL;
1828
1829	if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1830	    memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1831		return -EINVAL;
1832
1833	dst->icw_flags = 0;
1834	if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1835		dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1836	if (src->eof_flags & XFS_EOF_FLAGS_UID)
1837		dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1838	if (src->eof_flags & XFS_EOF_FLAGS_GID)
1839		dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1840	if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1841		dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1842	if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1843		dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1844
1845	dst->icw_prid = src->eof_prid;
1846	dst->icw_min_file_size = src->eof_min_file_size;
1847
1848	dst->icw_uid = INVALID_UID;
1849	if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1850		dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1851		if (!uid_valid(dst->icw_uid))
1852			return -EINVAL;
1853	}
1854
1855	dst->icw_gid = INVALID_GID;
1856	if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1857		dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1858		if (!gid_valid(dst->icw_gid))
1859			return -EINVAL;
1860	}
1861	return 0;
1862}
1863
1864/*
1865 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1866 * but retain these definitions so that we can log warnings about them.
1867 */
1868#define XFS_IOC_ALLOCSP		_IOW ('X', 10, struct xfs_flock64)
1869#define XFS_IOC_FREESP		_IOW ('X', 11, struct xfs_flock64)
1870#define XFS_IOC_ALLOCSP64	_IOW ('X', 36, struct xfs_flock64)
1871#define XFS_IOC_FREESP64	_IOW ('X', 37, struct xfs_flock64)
1872
1873/*
1874 * Note: some of the ioctl's return positive numbers as a
1875 * byte count indicating success, such as readlink_by_handle.
1876 * So we don't "sign flip" like most other routines.  This means
1877 * true errors need to be returned as a negative value.
1878 */
1879long
1880xfs_file_ioctl(
1881	struct file		*filp,
1882	unsigned int		cmd,
1883	unsigned long		p)
1884{
1885	struct inode		*inode = file_inode(filp);
1886	struct xfs_inode	*ip = XFS_I(inode);
1887	struct xfs_mount	*mp = ip->i_mount;
1888	void			__user *arg = (void __user *)p;
 
1889	int			error;
1890
 
 
 
1891	trace_xfs_file_ioctl(ip);
1892
1893	switch (cmd) {
1894	case FITRIM:
1895		return xfs_ioc_trim(mp, arg);
1896	case FS_IOC_GETFSLABEL:
1897		return xfs_ioc_getlabel(mp, arg);
1898	case FS_IOC_SETFSLABEL:
1899		return xfs_ioc_setlabel(filp, mp, arg);
1900	case XFS_IOC_ALLOCSP:
1901	case XFS_IOC_FREESP:
 
 
1902	case XFS_IOC_ALLOCSP64:
1903	case XFS_IOC_FREESP64:
1904		xfs_warn_once(mp,
1905	"%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1906				current->comm);
1907		return -ENOTTY;
 
 
 
 
 
1908	case XFS_IOC_DIOINFO: {
1909		struct xfs_buftarg	*target = xfs_inode_buftarg(ip);
1910		struct dioattr		da;
 
 
1911
1912		da.d_mem =  da.d_miniosz = target->bt_logical_sectorsize;
1913		da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1914
1915		if (copy_to_user(arg, &da, sizeof(da)))
1916			return -EFAULT;
1917		return 0;
1918	}
1919
1920	case XFS_IOC_FSBULKSTAT_SINGLE:
1921	case XFS_IOC_FSBULKSTAT:
1922	case XFS_IOC_FSINUMBERS:
1923		return xfs_ioc_fsbulkstat(filp, cmd, arg);
1924
1925	case XFS_IOC_BULKSTAT:
1926		return xfs_ioc_bulkstat(filp, cmd, arg);
1927	case XFS_IOC_INUMBERS:
1928		return xfs_ioc_inumbers(mp, cmd, arg);
1929
1930	case XFS_IOC_FSGEOMETRY_V1:
1931		return xfs_ioc_fsgeometry(mp, arg, 3);
1932	case XFS_IOC_FSGEOMETRY_V4:
1933		return xfs_ioc_fsgeometry(mp, arg, 4);
1934	case XFS_IOC_FSGEOMETRY:
1935		return xfs_ioc_fsgeometry(mp, arg, 5);
1936
1937	case XFS_IOC_AG_GEOMETRY:
1938		return xfs_ioc_ag_geometry(mp, arg);
1939
1940	case XFS_IOC_GETVERSION:
1941		return put_user(inode->i_generation, (int __user *)arg);
1942
 
 
1943	case XFS_IOC_FSGETXATTRA:
1944		return xfs_ioc_fsgetxattra(ip, arg);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1945
1946	case XFS_IOC_GETBMAP:
1947	case XFS_IOC_GETBMAPA:
1948	case XFS_IOC_GETBMAPX:
1949		return xfs_ioc_getbmap(filp, cmd, arg);
1950
1951	case FS_IOC_GETFSMAP:
1952		return xfs_ioc_getfsmap(ip, arg);
1953
1954	case XFS_IOC_SCRUB_METADATA:
1955		return xfs_ioc_scrub_metadata(filp, arg);
1956
1957	case XFS_IOC_FD_TO_HANDLE:
1958	case XFS_IOC_PATH_TO_HANDLE:
1959	case XFS_IOC_PATH_TO_FSHANDLE: {
1960		xfs_fsop_handlereq_t	hreq;
1961
1962		if (copy_from_user(&hreq, arg, sizeof(hreq)))
1963			return -EFAULT;
1964		return xfs_find_handle(cmd, &hreq);
1965	}
1966	case XFS_IOC_OPEN_BY_HANDLE: {
1967		xfs_fsop_handlereq_t	hreq;
1968
1969		if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1970			return -EFAULT;
1971		return xfs_open_by_handle(filp, &hreq);
1972	}
 
 
1973
1974	case XFS_IOC_READLINK_BY_HANDLE: {
1975		xfs_fsop_handlereq_t	hreq;
1976
1977		if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1978			return -EFAULT;
1979		return xfs_readlink_by_handle(filp, &hreq);
1980	}
1981	case XFS_IOC_ATTRLIST_BY_HANDLE:
1982		return xfs_attrlist_by_handle(filp, arg);
1983
1984	case XFS_IOC_ATTRMULTI_BY_HANDLE:
1985		return xfs_attrmulti_by_handle(filp, arg);
1986
1987	case XFS_IOC_SWAPEXT: {
1988		struct xfs_swapext	sxp;
1989
1990		if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1991			return -EFAULT;
1992		error = mnt_want_write_file(filp);
1993		if (error)
1994			return error;
1995		error = xfs_ioc_swapext(&sxp);
1996		mnt_drop_write_file(filp);
1997		return error;
1998	}
1999
2000	case XFS_IOC_FSCOUNTS: {
2001		xfs_fsop_counts_t out;
2002
2003		xfs_fs_counts(mp, &out);
 
 
2004
2005		if (copy_to_user(arg, &out, sizeof(out)))
2006			return -EFAULT;
2007		return 0;
2008	}
2009
2010	case XFS_IOC_SET_RESBLKS: {
2011		xfs_fsop_resblks_t inout;
2012		uint64_t	   in;
2013
2014		if (!capable(CAP_SYS_ADMIN))
2015			return -EPERM;
2016
2017		if (xfs_is_readonly(mp))
2018			return -EROFS;
2019
2020		if (copy_from_user(&inout, arg, sizeof(inout)))
2021			return -EFAULT;
2022
2023		error = mnt_want_write_file(filp);
2024		if (error)
2025			return error;
2026
2027		/* input parameter is passed in resblks field of structure */
2028		in = inout.resblks;
2029		error = xfs_reserve_blocks(mp, &in, &inout);
2030		mnt_drop_write_file(filp);
2031		if (error)
2032			return error;
2033
2034		if (copy_to_user(arg, &inout, sizeof(inout)))
2035			return -EFAULT;
2036		return 0;
2037	}
2038
2039	case XFS_IOC_GET_RESBLKS: {
2040		xfs_fsop_resblks_t out;
2041
2042		if (!capable(CAP_SYS_ADMIN))
2043			return -EPERM;
2044
2045		error = xfs_reserve_blocks(mp, NULL, &out);
2046		if (error)
2047			return error;
2048
2049		if (copy_to_user(arg, &out, sizeof(out)))
2050			return -EFAULT;
2051
2052		return 0;
2053	}
2054
2055	case XFS_IOC_FSGROWFSDATA: {
2056		struct xfs_growfs_data in;
2057
2058		if (copy_from_user(&in, arg, sizeof(in)))
2059			return -EFAULT;
2060
2061		error = mnt_want_write_file(filp);
2062		if (error)
2063			return error;
2064		error = xfs_growfs_data(mp, &in);
2065		mnt_drop_write_file(filp);
2066		return error;
2067	}
2068
2069	case XFS_IOC_FSGROWFSLOG: {
2070		struct xfs_growfs_log in;
2071
2072		if (copy_from_user(&in, arg, sizeof(in)))
2073			return -EFAULT;
2074
2075		error = mnt_want_write_file(filp);
2076		if (error)
2077			return error;
2078		error = xfs_growfs_log(mp, &in);
2079		mnt_drop_write_file(filp);
2080		return error;
2081	}
2082
2083	case XFS_IOC_FSGROWFSRT: {
2084		xfs_growfs_rt_t in;
2085
2086		if (copy_from_user(&in, arg, sizeof(in)))
2087			return -EFAULT;
2088
2089		error = mnt_want_write_file(filp);
2090		if (error)
2091			return error;
2092		error = xfs_growfs_rt(mp, &in);
2093		mnt_drop_write_file(filp);
2094		return error;
2095	}
2096
2097	case XFS_IOC_GOINGDOWN: {
2098		uint32_t in;
2099
2100		if (!capable(CAP_SYS_ADMIN))
2101			return -EPERM;
2102
2103		if (get_user(in, (uint32_t __user *)arg))
2104			return -EFAULT;
2105
2106		return xfs_fs_goingdown(mp, in);
 
2107	}
2108
2109	case XFS_IOC_ERROR_INJECTION: {
2110		xfs_error_injection_t in;
2111
2112		if (!capable(CAP_SYS_ADMIN))
2113			return -EPERM;
2114
2115		if (copy_from_user(&in, arg, sizeof(in)))
2116			return -EFAULT;
2117
2118		return xfs_errortag_add(mp, in.errtag);
 
2119	}
2120
2121	case XFS_IOC_ERROR_CLEARALL:
2122		if (!capable(CAP_SYS_ADMIN))
2123			return -EPERM;
2124
2125		return xfs_errortag_clearall(mp);
2126
2127	case XFS_IOC_FREE_EOFBLOCKS: {
2128		struct xfs_fs_eofblocks	eofb;
2129		struct xfs_icwalk	icw;
2130
2131		if (!capable(CAP_SYS_ADMIN))
2132			return -EPERM;
2133
2134		if (xfs_is_readonly(mp))
2135			return -EROFS;
2136
2137		if (copy_from_user(&eofb, arg, sizeof(eofb)))
2138			return -EFAULT;
2139
2140		error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2141		if (error)
2142			return error;
2143
2144		trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2145
2146		sb_start_write(mp->m_super);
2147		error = xfs_blockgc_free_space(mp, &icw);
2148		sb_end_write(mp->m_super);
2149		return error;
2150	}
2151
2152	default:
2153		return -ENOTTY;
2154	}
2155}