2018-06-06 10:42:14 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2013-08-12 18:49:35 +08:00
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/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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2013-10-23 07:36:05 +08:00
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#include "xfs_shared.h"
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2013-10-23 07:50:10 +08:00
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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2013-08-12 18:49:35 +08:00
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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2017-11-01 03:04:49 +08:00
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#include "xfs_errortag.h"
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2013-08-12 18:49:35 +08:00
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#include "xfs_error.h"
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#include "xfs_icache.h"
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2013-10-23 07:50:10 +08:00
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#include "xfs_trans.h"
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2013-10-23 07:51:50 +08:00
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#include "xfs_ialloc.h"
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2017-01-18 03:41:44 +08:00
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#include "xfs_dir2.h"
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2013-08-12 18:49:35 +08:00
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2017-12-11 19:35:19 +08:00
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#include <linux/iversion.h>
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2013-08-12 18:49:35 +08:00
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/*
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* Check that none of the inode's in the buffer have a next
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* unlinked field of 0.
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*/
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#if defined(DEBUG)
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void
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xfs_inobp_check(
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xfs_mount_t *mp,
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xfs_buf_t *bp)
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{
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int i;
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xfs_dinode_t *dip;
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2019-06-06 02:19:36 +08:00
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for (i = 0; i < M_IGEO(mp)->inodes_per_cluster; i++) {
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2015-06-22 07:44:29 +08:00
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dip = xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize);
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2013-08-12 18:49:35 +08:00
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if (!dip->di_next_unlinked) {
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xfs_alert(mp,
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2013-09-03 19:47:38 +08:00
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"Detected bogus zero next_unlinked field in inode %d buffer 0x%llx.",
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i, (long long)bp->b_bn);
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2013-08-12 18:49:35 +08:00
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}
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}
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}
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#endif
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2016-10-20 12:48:38 +08:00
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bool
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xfs_dinode_good_version(
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struct xfs_mount *mp,
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__u8 version)
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{
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if (xfs_sb_version_hascrc(&mp->m_sb))
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return version == 3;
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return version == 1 || version == 2;
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}
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2013-08-27 09:39:37 +08:00
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/*
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* If we are doing readahead on an inode buffer, we might be in log recovery
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* reading an inode allocation buffer that hasn't yet been replayed, and hence
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* has not had the inode cores stamped into it. Hence for readahead, the buffer
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* may be potentially invalid.
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*
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2016-01-12 04:03:44 +08:00
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* If the readahead buffer is invalid, we need to mark it with an error and
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* clear the DONE status of the buffer so that a followup read will re-read it
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* from disk. We don't report the error otherwise to avoid warnings during log
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* recovery and we don't get unnecssary panics on debug kernels. We use EIO here
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* because all we want to do is say readahead failed; there is no-one to report
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* the error to, so this will distinguish it from a non-ra verifier failure.
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2016-01-12 04:04:01 +08:00
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* Changes to this readahead error behavour also need to be reflected in
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* xfs_dquot_buf_readahead_verify().
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2013-08-27 09:39:37 +08:00
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*/
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2013-08-12 18:49:35 +08:00
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static void
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xfs_inode_buf_verify(
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2013-08-27 09:39:37 +08:00
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struct xfs_buf *bp,
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bool readahead)
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2013-08-12 18:49:35 +08:00
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{
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2019-06-29 10:27:29 +08:00
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struct xfs_mount *mp = bp->b_mount;
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2018-03-24 01:06:56 +08:00
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xfs_agnumber_t agno;
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2013-08-12 18:49:35 +08:00
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int i;
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int ni;
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/*
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* Validate the magic number and version of every inode in the buffer
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*/
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2018-03-24 01:06:56 +08:00
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agno = xfs_daddr_to_agno(mp, XFS_BUF_ADDR(bp));
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2013-08-12 18:49:35 +08:00
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ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock;
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for (i = 0; i < ni; i++) {
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int di_ok;
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xfs_dinode_t *dip;
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2018-03-24 01:06:56 +08:00
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xfs_agino_t unlinked_ino;
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2013-08-12 18:49:35 +08:00
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2015-06-22 07:44:29 +08:00
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dip = xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog));
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2018-03-24 01:06:56 +08:00
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unlinked_ino = be32_to_cpu(dip->di_next_unlinked);
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2019-02-17 03:47:28 +08:00
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di_ok = xfs_verify_magic16(bp, dip->di_magic) &&
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2018-03-24 01:06:56 +08:00
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xfs_dinode_good_version(mp, dip->di_version) &&
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2019-02-08 02:37:13 +08:00
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xfs_verify_agino_or_null(mp, agno, unlinked_ino);
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2013-08-12 18:49:35 +08:00
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if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
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2017-06-21 08:54:47 +08:00
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XFS_ERRTAG_ITOBP_INOTOBP))) {
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2013-08-27 09:39:37 +08:00
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if (readahead) {
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bp->b_flags &= ~XBF_DONE;
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2016-01-12 04:03:44 +08:00
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xfs_buf_ioerror(bp, -EIO);
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2013-08-27 09:39:37 +08:00
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return;
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}
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2013-08-12 18:49:35 +08:00
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#ifdef DEBUG
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2013-09-03 19:47:38 +08:00
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xfs_alert(mp,
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2013-08-12 18:49:35 +08:00
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"bad inode magic/vsn daddr %lld #%d (magic=%x)",
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(unsigned long long)bp->b_bn, i,
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be16_to_cpu(dip->di_magic));
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#endif
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2018-03-24 01:06:53 +08:00
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xfs_buf_verifier_error(bp, -EFSCORRUPTED,
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__func__, dip, sizeof(*dip),
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NULL);
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2018-03-24 01:06:56 +08:00
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return;
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2013-08-12 18:49:35 +08:00
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}
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}
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}
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static void
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xfs_inode_buf_read_verify(
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struct xfs_buf *bp)
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{
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2013-08-27 09:39:37 +08:00
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xfs_inode_buf_verify(bp, false);
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}
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static void
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xfs_inode_buf_readahead_verify(
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struct xfs_buf *bp)
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{
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xfs_inode_buf_verify(bp, true);
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2013-08-12 18:49:35 +08:00
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}
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static void
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xfs_inode_buf_write_verify(
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struct xfs_buf *bp)
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{
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2013-08-27 09:39:37 +08:00
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xfs_inode_buf_verify(bp, false);
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2013-08-12 18:49:35 +08:00
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}
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const struct xfs_buf_ops xfs_inode_buf_ops = {
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2016-01-04 13:10:19 +08:00
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.name = "xfs_inode",
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2019-02-17 03:47:28 +08:00
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.magic16 = { cpu_to_be16(XFS_DINODE_MAGIC),
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cpu_to_be16(XFS_DINODE_MAGIC) },
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2013-08-12 18:49:35 +08:00
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.verify_read = xfs_inode_buf_read_verify,
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.verify_write = xfs_inode_buf_write_verify,
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};
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2013-08-27 09:39:37 +08:00
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const struct xfs_buf_ops xfs_inode_buf_ra_ops = {
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2019-02-08 02:45:45 +08:00
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.name = "xfs_inode_ra",
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2019-02-17 03:47:28 +08:00
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.magic16 = { cpu_to_be16(XFS_DINODE_MAGIC),
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cpu_to_be16(XFS_DINODE_MAGIC) },
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2013-08-27 09:39:37 +08:00
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.verify_read = xfs_inode_buf_readahead_verify,
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.verify_write = xfs_inode_buf_write_verify,
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};
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2013-08-12 18:49:35 +08:00
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/*
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* This routine is called to map an inode to the buffer containing the on-disk
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* version of the inode. It returns a pointer to the buffer containing the
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* on-disk inode in the bpp parameter, and in the dipp parameter it returns a
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* pointer to the on-disk inode within that buffer.
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*
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* If a non-zero error is returned, then the contents of bpp and dipp are
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* undefined.
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*/
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int
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xfs_imap_to_bp(
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struct xfs_mount *mp,
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struct xfs_trans *tp,
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struct xfs_imap *imap,
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struct xfs_dinode **dipp,
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struct xfs_buf **bpp,
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uint buf_flags,
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uint iget_flags)
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{
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struct xfs_buf *bp;
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int error;
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buf_flags |= XBF_UNMAPPED;
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error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno,
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(int)imap->im_len, buf_flags, &bp,
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&xfs_inode_buf_ops);
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if (error) {
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2014-06-25 12:58:08 +08:00
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if (error == -EAGAIN) {
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2013-08-12 18:49:35 +08:00
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ASSERT(buf_flags & XBF_TRYLOCK);
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return error;
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}
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xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.",
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__func__, error);
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return error;
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}
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*bpp = bp;
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2015-06-22 07:44:29 +08:00
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*dipp = xfs_buf_offset(bp, imap->im_boffset);
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2013-08-12 18:49:35 +08:00
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return 0;
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}
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xfs: recovery of swap extents operations for CRC filesystems
This is the recovery side of the btree block owner change operation
performed by swapext on CRC enabled filesystems. We detect that an
owner change is needed by the flag that has been placed on the inode
log format flag field. Because the inode recovery is being replayed
after the buffers that make up the BMBT in the given checkpoint, we
can walk all the buffers and directly modify them when we see the
flag set on an inode.
Because the inode can be relogged and hence present in multiple
chekpoints with the "change owner" flag set, we could do multiple
passes across the inode to do this change. While this isn't optimal,
we can't directly ignore the flag as there may be multiple
independent swap extent operations being replayed on the same inode
in different checkpoints so we can't ignore them.
Further, because the owner change operation uses ordered buffers, we
might have buffers that are newer on disk than the current
checkpoint and so already have the owner changed in them. Hence we
cannot just peek at a buffer in the tree and check that it has the
correct owner and assume that the change was completed.
So, for the moment just brute force the owner change every time we
see an inode with the flag set. Note that we have to be careful here
because the owner of the buffers may point to either the old owner
or the new owner. Currently the verifier can't verify the owner
directly, so there is no failure case here right now. If we verify
the owner exactly in future, then we'll have to take this into
account.
This was tested in terms of normal operation via xfstests - all of
the fsr tests now pass without failure. however, we really need to
modify xfs/227 to stress v3 inodes correctly to ensure we fully
cover this case for v5 filesystems.
In terms of recovery testing, I used a hacked version of xfs_fsr
that held the temp inode open for a few seconds before exiting so
that the filesystem could be shut down with an open owner change
recovery flags set on at least the temp inode. fsr leaves the temp
inode unlinked and in btree format, so this was necessary for the
owner change to be reliably replayed.
logprint confirmed the tmp inode in the log had the correct flag set:
INO: cnt:3 total:3 a:0x69e9e0 len:56 a:0x69ea20 len:176 a:0x69eae0 len:88
INODE: #regs:3 ino:0x44 flags:0x209 dsize:88
^^^^^
0x200 is set, indicating a data fork owner change needed to be
replayed on inode 0x44. A printk in the revoery code confirmed that
the inode change was recovered:
XFS (vdc): Mounting Filesystem
XFS (vdc): Starting recovery (logdev: internal)
recovering owner change ino 0x44
XFS (vdc): Version 5 superblock detected. This kernel L support enabled!
Use of these features in this kernel is at your own risk!
XFS (vdc): Ending recovery (logdev: internal)
The script used to test this was:
$ cat ./recovery-fsr.sh
#!/bin/bash
dev=/dev/vdc
mntpt=/mnt/scratch
testfile=$mntpt/testfile
umount $mntpt
mkfs.xfs -f -m crc=1 $dev
mount $dev $mntpt
chmod 777 $mntpt
for i in `seq 10000 -1 0`; do
xfs_io -f -d -c "pwrite $(($i * 4096)) 4096" $testfile > /dev/null 2>&1
done
xfs_bmap -vp $testfile |head -20
xfs_fsr -d -v $testfile &
sleep 10
/home/dave/src/xfstests-dev/src/godown -f $mntpt
wait
umount $mntpt
xfs_logprint -t $dev |tail -20
time mount $dev $mntpt
xfs_bmap -vp $testfile
umount $mntpt
$
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-08-30 08:23:45 +08:00
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void
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2016-02-09 13:54:58 +08:00
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xfs_inode_from_disk(
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struct xfs_inode *ip,
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2016-02-09 13:54:58 +08:00
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struct xfs_dinode *from)
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2013-08-12 18:49:35 +08:00
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{
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2016-02-09 13:54:58 +08:00
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struct xfs_icdinode *to = &ip->i_d;
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struct inode *inode = VFS_I(ip);
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2016-02-09 13:54:58 +08:00
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/*
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* Convert v1 inodes immediately to v2 inode format as this is the
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* minimum inode version format we support in the rest of the code.
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*/
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2016-02-09 13:54:58 +08:00
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to->di_version = from->di_version;
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2016-02-09 13:54:58 +08:00
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if (to->di_version == 1) {
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2016-02-09 13:54:58 +08:00
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set_nlink(inode, be16_to_cpu(from->di_onlink));
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2019-11-13 00:22:54 +08:00
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to->di_projid = 0;
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2016-02-09 13:54:58 +08:00
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to->di_version = 2;
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} else {
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2016-02-09 13:54:58 +08:00
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set_nlink(inode, be32_to_cpu(from->di_nlink));
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2019-11-13 00:22:54 +08:00
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to->di_projid = (prid_t)be16_to_cpu(from->di_projid_hi) << 16 |
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be16_to_cpu(from->di_projid_lo);
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2016-02-09 13:54:58 +08:00
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}
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2013-08-12 18:49:35 +08:00
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to->di_format = from->di_format;
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2020-02-22 00:31:27 +08:00
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i_uid_write(inode, be32_to_cpu(from->di_uid));
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i_gid_write(inode, be32_to_cpu(from->di_gid));
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2013-08-12 18:49:35 +08:00
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to->di_flushiter = be16_to_cpu(from->di_flushiter);
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2016-02-09 13:54:58 +08:00
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/*
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* Time is signed, so need to convert to signed 32 bit before
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* storing in inode timestamp which may be 64 bit. Otherwise
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* a time before epoch is converted to a time long after epoch
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* on 64 bit systems.
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*/
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inode->i_atime.tv_sec = (int)be32_to_cpu(from->di_atime.t_sec);
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inode->i_atime.tv_nsec = (int)be32_to_cpu(from->di_atime.t_nsec);
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inode->i_mtime.tv_sec = (int)be32_to_cpu(from->di_mtime.t_sec);
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inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec);
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inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec);
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inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec);
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2016-02-09 13:54:58 +08:00
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inode->i_generation = be32_to_cpu(from->di_gen);
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2016-02-09 13:54:58 +08:00
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inode->i_mode = be16_to_cpu(from->di_mode);
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2016-02-09 13:54:58 +08:00
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2013-08-12 18:49:35 +08:00
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|
|
to->di_size = be64_to_cpu(from->di_size);
|
|
|
|
to->di_nblocks = be64_to_cpu(from->di_nblocks);
|
|
|
|
to->di_extsize = be32_to_cpu(from->di_extsize);
|
|
|
|
to->di_nextents = be32_to_cpu(from->di_nextents);
|
|
|
|
to->di_anextents = be16_to_cpu(from->di_anextents);
|
|
|
|
to->di_forkoff = from->di_forkoff;
|
|
|
|
to->di_aformat = from->di_aformat;
|
|
|
|
to->di_dmevmask = be32_to_cpu(from->di_dmevmask);
|
|
|
|
to->di_dmstate = be16_to_cpu(from->di_dmstate);
|
|
|
|
to->di_flags = be16_to_cpu(from->di_flags);
|
|
|
|
|
|
|
|
if (to->di_version == 3) {
|
2017-12-11 19:35:19 +08:00
|
|
|
inode_set_iversion_queried(inode,
|
|
|
|
be64_to_cpu(from->di_changecount));
|
2019-11-13 00:20:42 +08:00
|
|
|
to->di_crtime.tv_sec = be32_to_cpu(from->di_crtime.t_sec);
|
|
|
|
to->di_crtime.tv_nsec = be32_to_cpu(from->di_crtime.t_nsec);
|
2013-08-12 18:49:35 +08:00
|
|
|
to->di_flags2 = be64_to_cpu(from->di_flags2);
|
2016-10-04 00:11:43 +08:00
|
|
|
to->di_cowextsize = be32_to_cpu(from->di_cowextsize);
|
2013-08-12 18:49:35 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2016-02-09 13:54:58 +08:00
|
|
|
xfs_inode_to_disk(
|
|
|
|
struct xfs_inode *ip,
|
2016-02-09 13:54:58 +08:00
|
|
|
struct xfs_dinode *to,
|
|
|
|
xfs_lsn_t lsn)
|
2016-02-09 13:54:58 +08:00
|
|
|
{
|
|
|
|
struct xfs_icdinode *from = &ip->i_d;
|
|
|
|
struct inode *inode = VFS_I(ip);
|
|
|
|
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_onlink = 0;
|
2016-02-09 13:54:58 +08:00
|
|
|
|
|
|
|
to->di_version = from->di_version;
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_format = from->di_format;
|
2020-02-22 00:31:27 +08:00
|
|
|
to->di_uid = cpu_to_be32(i_uid_read(inode));
|
|
|
|
to->di_gid = cpu_to_be32(i_gid_read(inode));
|
2019-11-13 00:22:54 +08:00
|
|
|
to->di_projid_lo = cpu_to_be16(from->di_projid & 0xffff);
|
|
|
|
to->di_projid_hi = cpu_to_be16(from->di_projid >> 16);
|
2016-02-09 13:54:58 +08:00
|
|
|
|
2016-02-09 13:54:58 +08:00
|
|
|
memset(to->di_pad, 0, sizeof(to->di_pad));
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec);
|
|
|
|
to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
|
|
|
|
to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec);
|
|
|
|
to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec);
|
|
|
|
to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec);
|
|
|
|
to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_nlink = cpu_to_be32(inode->i_nlink);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_gen = cpu_to_be32(inode->i_generation);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_mode = cpu_to_be16(inode->i_mode);
|
2016-02-09 13:54:58 +08:00
|
|
|
|
|
|
|
to->di_size = cpu_to_be64(from->di_size);
|
|
|
|
to->di_nblocks = cpu_to_be64(from->di_nblocks);
|
|
|
|
to->di_extsize = cpu_to_be32(from->di_extsize);
|
|
|
|
to->di_nextents = cpu_to_be32(from->di_nextents);
|
|
|
|
to->di_anextents = cpu_to_be16(from->di_anextents);
|
|
|
|
to->di_forkoff = from->di_forkoff;
|
|
|
|
to->di_aformat = from->di_aformat;
|
|
|
|
to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
|
|
|
|
to->di_dmstate = cpu_to_be16(from->di_dmstate);
|
|
|
|
to->di_flags = cpu_to_be16(from->di_flags);
|
|
|
|
|
|
|
|
if (from->di_version == 3) {
|
2017-12-11 19:35:19 +08:00
|
|
|
to->di_changecount = cpu_to_be64(inode_peek_iversion(inode));
|
2019-11-13 00:20:42 +08:00
|
|
|
to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.tv_sec);
|
|
|
|
to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.tv_nsec);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_flags2 = cpu_to_be64(from->di_flags2);
|
2016-10-04 00:11:43 +08:00
|
|
|
to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_ino = cpu_to_be64(ip->i_ino);
|
|
|
|
to->di_lsn = cpu_to_be64(lsn);
|
|
|
|
memset(to->di_pad2, 0, sizeof(to->di_pad2));
|
|
|
|
uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_flushiter = 0;
|
|
|
|
} else {
|
|
|
|
to->di_flushiter = cpu_to_be16(from->di_flushiter);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
xfs_log_dinode_to_disk(
|
|
|
|
struct xfs_log_dinode *from,
|
|
|
|
struct xfs_dinode *to)
|
2013-08-12 18:49:35 +08:00
|
|
|
{
|
|
|
|
to->di_magic = cpu_to_be16(from->di_magic);
|
|
|
|
to->di_mode = cpu_to_be16(from->di_mode);
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_version = from->di_version;
|
2013-08-12 18:49:35 +08:00
|
|
|
to->di_format = from->di_format;
|
2016-02-09 13:54:58 +08:00
|
|
|
to->di_onlink = 0;
|
2013-08-12 18:49:35 +08:00
|
|
|
to->di_uid = cpu_to_be32(from->di_uid);
|
|
|
|
to->di_gid = cpu_to_be32(from->di_gid);
|
|
|
|
to->di_nlink = cpu_to_be32(from->di_nlink);
|
|
|
|
to->di_projid_lo = cpu_to_be16(from->di_projid_lo);
|
|
|
|
to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
|
|
|
|
memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
|
2016-02-09 13:54:58 +08:00
|
|
|
|
2013-08-12 18:49:35 +08:00
|
|
|
to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec);
|
|
|
|
to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec);
|
|
|
|
to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec);
|
|
|
|
to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec);
|
|
|
|
to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec);
|
|
|
|
to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec);
|
2016-02-09 13:54:58 +08:00
|
|
|
|
2013-08-12 18:49:35 +08:00
|
|
|
to->di_size = cpu_to_be64(from->di_size);
|
|
|
|
to->di_nblocks = cpu_to_be64(from->di_nblocks);
|
|
|
|
to->di_extsize = cpu_to_be32(from->di_extsize);
|
|
|
|
to->di_nextents = cpu_to_be32(from->di_nextents);
|
|
|
|
to->di_anextents = cpu_to_be16(from->di_anextents);
|
|
|
|
to->di_forkoff = from->di_forkoff;
|
|
|
|
to->di_aformat = from->di_aformat;
|
|
|
|
to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
|
|
|
|
to->di_dmstate = cpu_to_be16(from->di_dmstate);
|
|
|
|
to->di_flags = cpu_to_be16(from->di_flags);
|
|
|
|
to->di_gen = cpu_to_be32(from->di_gen);
|
|
|
|
|
|
|
|
if (from->di_version == 3) {
|
|
|
|
to->di_changecount = cpu_to_be64(from->di_changecount);
|
|
|
|
to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
|
|
|
|
to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
|
|
|
|
to->di_flags2 = cpu_to_be64(from->di_flags2);
|
2016-10-04 00:11:43 +08:00
|
|
|
to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
|
2013-08-12 18:49:35 +08:00
|
|
|
to->di_ino = cpu_to_be64(from->di_ino);
|
|
|
|
to->di_lsn = cpu_to_be64(from->di_lsn);
|
|
|
|
memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
|
|
|
|
uuid_copy(&to->di_uuid, &from->di_uuid);
|
|
|
|
to->di_flushiter = 0;
|
|
|
|
} else {
|
|
|
|
to->di_flushiter = cpu_to_be16(from->di_flushiter);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-06-22 14:25:57 +08:00
|
|
|
static xfs_failaddr_t
|
|
|
|
xfs_dinode_verify_fork(
|
|
|
|
struct xfs_dinode *dip,
|
|
|
|
struct xfs_mount *mp,
|
|
|
|
int whichfork)
|
|
|
|
{
|
|
|
|
uint32_t di_nextents = XFS_DFORK_NEXTENTS(dip, whichfork);
|
|
|
|
|
|
|
|
switch (XFS_DFORK_FORMAT(dip, whichfork)) {
|
|
|
|
case XFS_DINODE_FMT_LOCAL:
|
|
|
|
/*
|
|
|
|
* no local regular files yet
|
|
|
|
*/
|
|
|
|
if (whichfork == XFS_DATA_FORK) {
|
|
|
|
if (S_ISREG(be16_to_cpu(dip->di_mode)))
|
|
|
|
return __this_address;
|
|
|
|
if (be64_to_cpu(dip->di_size) >
|
|
|
|
XFS_DFORK_SIZE(dip, mp, whichfork))
|
|
|
|
return __this_address;
|
|
|
|
}
|
|
|
|
if (di_nextents)
|
|
|
|
return __this_address;
|
|
|
|
break;
|
|
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
|
|
if (di_nextents > XFS_DFORK_MAXEXT(dip, mp, whichfork))
|
|
|
|
return __this_address;
|
|
|
|
break;
|
|
|
|
case XFS_DINODE_FMT_BTREE:
|
|
|
|
if (whichfork == XFS_ATTR_FORK) {
|
|
|
|
if (di_nextents > MAXAEXTNUM)
|
|
|
|
return __this_address;
|
|
|
|
} else if (di_nextents > MAXEXTNUM) {
|
|
|
|
return __this_address;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return __this_address;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2018-09-29 11:50:13 +08:00
|
|
|
static xfs_failaddr_t
|
|
|
|
xfs_dinode_verify_forkoff(
|
|
|
|
struct xfs_dinode *dip,
|
|
|
|
struct xfs_mount *mp)
|
|
|
|
{
|
|
|
|
if (!XFS_DFORK_Q(dip))
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
switch (dip->di_format) {
|
|
|
|
case XFS_DINODE_FMT_DEV:
|
|
|
|
if (dip->di_forkoff != (roundup(sizeof(xfs_dev_t), 8) >> 3))
|
|
|
|
return __this_address;
|
|
|
|
break;
|
|
|
|
case XFS_DINODE_FMT_LOCAL: /* fall through ... */
|
|
|
|
case XFS_DINODE_FMT_EXTENTS: /* fall through ... */
|
|
|
|
case XFS_DINODE_FMT_BTREE:
|
|
|
|
if (dip->di_forkoff >= (XFS_LITINO(mp, dip->di_version) >> 3))
|
|
|
|
return __this_address;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return __this_address;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2018-01-09 02:51:03 +08:00
|
|
|
xfs_failaddr_t
|
2013-08-12 18:49:35 +08:00
|
|
|
xfs_dinode_verify(
|
|
|
|
struct xfs_mount *mp,
|
2016-11-08 08:56:06 +08:00
|
|
|
xfs_ino_t ino,
|
2013-08-12 18:49:35 +08:00
|
|
|
struct xfs_dinode *dip)
|
|
|
|
{
|
2018-06-06 01:06:44 +08:00
|
|
|
xfs_failaddr_t fa;
|
2017-01-18 03:41:41 +08:00
|
|
|
uint16_t mode;
|
2016-10-04 00:11:50 +08:00
|
|
|
uint16_t flags;
|
|
|
|
uint64_t flags2;
|
2018-01-09 02:51:04 +08:00
|
|
|
uint64_t di_size;
|
2016-10-04 00:11:50 +08:00
|
|
|
|
2013-08-12 18:49:35 +08:00
|
|
|
if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2013-08-12 18:49:35 +08:00
|
|
|
|
2018-01-09 02:51:04 +08:00
|
|
|
/* Verify v3 integrity information first */
|
|
|
|
if (dip->di_version >= 3) {
|
|
|
|
if (!xfs_sb_version_hascrc(&mp->m_sb))
|
|
|
|
return __this_address;
|
|
|
|
if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
|
|
|
|
XFS_DINODE_CRC_OFF))
|
|
|
|
return __this_address;
|
|
|
|
if (be64_to_cpu(dip->di_ino) != ino)
|
|
|
|
return __this_address;
|
|
|
|
if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid))
|
|
|
|
return __this_address;
|
|
|
|
}
|
2013-08-12 18:49:35 +08:00
|
|
|
|
2016-12-05 09:38:38 +08:00
|
|
|
/* don't allow invalid i_size */
|
2018-01-09 02:51:04 +08:00
|
|
|
di_size = be64_to_cpu(dip->di_size);
|
|
|
|
if (di_size & (1ULL << 63))
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2016-12-05 09:38:38 +08:00
|
|
|
|
2017-01-18 03:41:41 +08:00
|
|
|
mode = be16_to_cpu(dip->di_mode);
|
2017-01-18 03:41:44 +08:00
|
|
|
if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN)
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2017-01-18 03:41:41 +08:00
|
|
|
|
|
|
|
/* No zero-length symlinks/dirs. */
|
2018-01-09 02:51:04 +08:00
|
|
|
if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0)
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2016-12-05 09:38:38 +08:00
|
|
|
|
2018-01-09 02:51:04 +08:00
|
|
|
/* Fork checks carried over from xfs_iformat_fork */
|
|
|
|
if (mode &&
|
|
|
|
be32_to_cpu(dip->di_nextents) + be16_to_cpu(dip->di_anextents) >
|
|
|
|
be64_to_cpu(dip->di_nblocks))
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (mode && XFS_DFORK_BOFF(dip) > mp->m_sb.sb_inodesize)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
flags = be16_to_cpu(dip->di_flags);
|
|
|
|
|
|
|
|
if (mode && (flags & XFS_DIFLAG_REALTIME) && !mp->m_rtdev_targp)
|
|
|
|
return __this_address;
|
|
|
|
|
2018-09-29 11:50:13 +08:00
|
|
|
/* check for illegal values of forkoff */
|
|
|
|
fa = xfs_dinode_verify_forkoff(dip, mp);
|
|
|
|
if (fa)
|
|
|
|
return fa;
|
|
|
|
|
2018-01-09 02:51:04 +08:00
|
|
|
/* Do we have appropriate data fork formats for the mode? */
|
|
|
|
switch (mode & S_IFMT) {
|
|
|
|
case S_IFIFO:
|
|
|
|
case S_IFCHR:
|
|
|
|
case S_IFBLK:
|
|
|
|
case S_IFSOCK:
|
|
|
|
if (dip->di_format != XFS_DINODE_FMT_DEV)
|
|
|
|
return __this_address;
|
|
|
|
break;
|
|
|
|
case S_IFREG:
|
|
|
|
case S_IFLNK:
|
|
|
|
case S_IFDIR:
|
2018-06-22 14:25:57 +08:00
|
|
|
fa = xfs_dinode_verify_fork(dip, mp, XFS_DATA_FORK);
|
|
|
|
if (fa)
|
|
|
|
return fa;
|
2018-01-09 02:51:04 +08:00
|
|
|
break;
|
|
|
|
case 0:
|
|
|
|
/* Uninitialized inode ok. */
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return __this_address;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (XFS_DFORK_Q(dip)) {
|
2018-06-22 14:25:57 +08:00
|
|
|
fa = xfs_dinode_verify_fork(dip, mp, XFS_ATTR_FORK);
|
|
|
|
if (fa)
|
|
|
|
return fa;
|
2018-04-17 14:06:53 +08:00
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* If there is no fork offset, this may be a freshly-made inode
|
|
|
|
* in a new disk cluster, in which case di_aformat is zeroed.
|
|
|
|
* Otherwise, such an inode must be in EXTENTS format; this goes
|
|
|
|
* for freed inodes as well.
|
|
|
|
*/
|
|
|
|
switch (dip->di_aformat) {
|
|
|
|
case 0:
|
|
|
|
case XFS_DINODE_FMT_EXTENTS:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return __this_address;
|
|
|
|
}
|
|
|
|
if (dip->di_anextents)
|
|
|
|
return __this_address;
|
2018-01-09 02:51:04 +08:00
|
|
|
}
|
2016-12-05 09:38:38 +08:00
|
|
|
|
2018-06-06 01:06:44 +08:00
|
|
|
/* extent size hint validation */
|
|
|
|
fa = xfs_inode_validate_extsize(mp, be32_to_cpu(dip->di_extsize),
|
|
|
|
mode, flags);
|
|
|
|
if (fa)
|
|
|
|
return fa;
|
|
|
|
|
2013-08-12 18:49:35 +08:00
|
|
|
/* only version 3 or greater inodes are extensively verified here */
|
|
|
|
if (dip->di_version < 3)
|
2018-01-09 02:51:03 +08:00
|
|
|
return NULL;
|
2016-10-04 00:11:50 +08:00
|
|
|
|
|
|
|
flags2 = be64_to_cpu(dip->di_flags2);
|
|
|
|
|
|
|
|
/* don't allow reflink/cowextsize if we don't have reflink */
|
|
|
|
if ((flags2 & (XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE)) &&
|
2018-06-06 01:06:44 +08:00
|
|
|
!xfs_sb_version_hasreflink(&mp->m_sb))
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2016-10-04 00:11:50 +08:00
|
|
|
|
2018-01-09 02:51:04 +08:00
|
|
|
/* only regular files get reflink */
|
|
|
|
if ((flags2 & XFS_DIFLAG2_REFLINK) && (mode & S_IFMT) != S_IFREG)
|
|
|
|
return __this_address;
|
2016-10-04 00:11:50 +08:00
|
|
|
|
|
|
|
/* don't let reflink and realtime mix */
|
|
|
|
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME))
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2016-10-04 00:11:50 +08:00
|
|
|
|
2016-10-04 00:11:50 +08:00
|
|
|
/* don't let reflink and dax mix */
|
|
|
|
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX))
|
2018-01-09 02:51:03 +08:00
|
|
|
return __this_address;
|
2016-10-04 00:11:50 +08:00
|
|
|
|
2018-06-06 01:09:33 +08:00
|
|
|
/* COW extent size hint validation */
|
|
|
|
fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
|
|
|
|
mode, flags, flags2);
|
|
|
|
if (fa)
|
|
|
|
return fa;
|
|
|
|
|
2018-01-09 02:51:03 +08:00
|
|
|
return NULL;
|
2013-08-12 18:49:35 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
xfs_dinode_calc_crc(
|
|
|
|
struct xfs_mount *mp,
|
|
|
|
struct xfs_dinode *dip)
|
|
|
|
{
|
2017-06-17 02:00:05 +08:00
|
|
|
uint32_t crc;
|
2013-08-12 18:49:35 +08:00
|
|
|
|
|
|
|
if (dip->di_version < 3)
|
|
|
|
return;
|
|
|
|
|
|
|
|
ASSERT(xfs_sb_version_hascrc(&mp->m_sb));
|
2016-12-05 11:40:32 +08:00
|
|
|
crc = xfs_start_cksum_update((char *)dip, mp->m_sb.sb_inodesize,
|
2014-02-27 12:15:27 +08:00
|
|
|
XFS_DINODE_CRC_OFF);
|
2013-08-12 18:49:35 +08:00
|
|
|
dip->di_crc = xfs_end_cksum(crc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read the disk inode attributes into the in-core inode structure.
|
|
|
|
*
|
|
|
|
* For version 5 superblocks, if we are initialising a new inode and we are not
|
|
|
|
* utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new
|
|
|
|
* inode core with a random generation number. If we are keeping inodes around,
|
|
|
|
* we need to read the inode cluster to get the existing generation number off
|
|
|
|
* disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode
|
|
|
|
* format) then log recovery is dependent on the di_flushiter field being
|
|
|
|
* initialised from the current on-disk value and hence we must also read the
|
|
|
|
* inode off disk.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
xfs_iread(
|
|
|
|
xfs_mount_t *mp,
|
|
|
|
xfs_trans_t *tp,
|
|
|
|
xfs_inode_t *ip,
|
|
|
|
uint iget_flags)
|
|
|
|
{
|
|
|
|
xfs_buf_t *bp;
|
|
|
|
xfs_dinode_t *dip;
|
2018-01-09 02:51:03 +08:00
|
|
|
xfs_failaddr_t fa;
|
2013-08-12 18:49:35 +08:00
|
|
|
int error;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Fill in the location information in the in-core inode.
|
|
|
|
*/
|
|
|
|
error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* shortcut IO on inode allocation if possible */
|
|
|
|
if ((iget_flags & XFS_IGET_CREATE) &&
|
|
|
|
xfs_sb_version_hascrc(&mp->m_sb) &&
|
|
|
|
!(mp->m_flags & XFS_MOUNT_IKEEP)) {
|
2016-02-09 13:54:58 +08:00
|
|
|
VFS_I(ip)->i_generation = prandom_u32();
|
2018-03-24 01:22:54 +08:00
|
|
|
ip->i_d.di_version = 3;
|
2013-08-12 18:49:35 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get pointers to the on-disk inode and the buffer containing it.
|
|
|
|
*/
|
|
|
|
error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
/* even unallocated inodes are verified */
|
2018-01-09 02:51:03 +08:00
|
|
|
fa = xfs_dinode_verify(mp, ip->i_ino, dip);
|
|
|
|
if (fa) {
|
2018-01-23 10:09:48 +08:00
|
|
|
xfs_inode_verifier_error(ip, -EFSCORRUPTED, "dinode", dip,
|
|
|
|
sizeof(*dip), fa);
|
2014-06-25 12:58:08 +08:00
|
|
|
error = -EFSCORRUPTED;
|
2013-08-12 18:49:35 +08:00
|
|
|
goto out_brelse;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the on-disk inode is already linked to a directory
|
|
|
|
* entry, copy all of the inode into the in-core inode.
|
|
|
|
* xfs_iformat_fork() handles copying in the inode format
|
|
|
|
* specific information.
|
|
|
|
* Otherwise, just get the truly permanent information.
|
|
|
|
*/
|
|
|
|
if (dip->di_mode) {
|
2016-02-09 13:54:58 +08:00
|
|
|
xfs_inode_from_disk(ip, dip);
|
2013-08-12 18:49:35 +08:00
|
|
|
error = xfs_iformat_fork(ip, dip);
|
|
|
|
if (error) {
|
|
|
|
#ifdef DEBUG
|
|
|
|
xfs_alert(mp, "%s: xfs_iformat() returned error %d",
|
|
|
|
__func__, error);
|
|
|
|
#endif /* DEBUG */
|
|
|
|
goto out_brelse;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Partial initialisation of the in-core inode. Just the bits
|
|
|
|
* that xfs_ialloc won't overwrite or relies on being correct.
|
|
|
|
*/
|
|
|
|
ip->i_d.di_version = dip->di_version;
|
2016-02-09 13:54:58 +08:00
|
|
|
VFS_I(ip)->i_generation = be32_to_cpu(dip->di_gen);
|
2013-08-12 18:49:35 +08:00
|
|
|
ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Make sure to pull in the mode here as well in
|
|
|
|
* case the inode is released without being used.
|
|
|
|
* This ensures that xfs_inactive() will see that
|
|
|
|
* the inode is already free and not try to mess
|
|
|
|
* with the uninitialized part of it.
|
|
|
|
*/
|
2016-02-09 13:54:58 +08:00
|
|
|
VFS_I(ip)->i_mode = 0;
|
2013-08-12 18:49:35 +08:00
|
|
|
}
|
|
|
|
|
2016-02-09 13:54:58 +08:00
|
|
|
ASSERT(ip->i_d.di_version >= 2);
|
2013-08-12 18:49:35 +08:00
|
|
|
ip->i_delayed_blks = 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Mark the buffer containing the inode as something to keep
|
|
|
|
* around for a while. This helps to keep recently accessed
|
|
|
|
* meta-data in-core longer.
|
|
|
|
*/
|
|
|
|
xfs_buf_set_ref(bp, XFS_INO_REF);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Use xfs_trans_brelse() to release the buffer containing the on-disk
|
|
|
|
* inode, because it was acquired with xfs_trans_read_buf() in
|
|
|
|
* xfs_imap_to_bp() above. If tp is NULL, this is just a normal
|
|
|
|
* brelse(). If we're within a transaction, then xfs_trans_brelse()
|
|
|
|
* will only release the buffer if it is not dirty within the
|
|
|
|
* transaction. It will be OK to release the buffer in this case,
|
|
|
|
* because inodes on disk are never destroyed and we will be locking the
|
|
|
|
* new in-core inode before putting it in the cache where other
|
|
|
|
* processes can find it. Thus we don't have to worry about the inode
|
|
|
|
* being changed just because we released the buffer.
|
|
|
|
*/
|
|
|
|
out_brelse:
|
|
|
|
xfs_trans_brelse(tp, bp);
|
|
|
|
return error;
|
|
|
|
}
|
2018-03-24 01:06:55 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Validate di_extsize hint.
|
|
|
|
*
|
|
|
|
* The rules are documented at xfs_ioctl_setattr_check_extsize().
|
|
|
|
* These functions must be kept in sync with each other.
|
|
|
|
*/
|
|
|
|
xfs_failaddr_t
|
|
|
|
xfs_inode_validate_extsize(
|
|
|
|
struct xfs_mount *mp,
|
|
|
|
uint32_t extsize,
|
|
|
|
uint16_t mode,
|
|
|
|
uint16_t flags)
|
|
|
|
{
|
|
|
|
bool rt_flag;
|
|
|
|
bool hint_flag;
|
|
|
|
bool inherit_flag;
|
|
|
|
uint32_t extsize_bytes;
|
|
|
|
uint32_t blocksize_bytes;
|
|
|
|
|
|
|
|
rt_flag = (flags & XFS_DIFLAG_REALTIME);
|
|
|
|
hint_flag = (flags & XFS_DIFLAG_EXTSIZE);
|
|
|
|
inherit_flag = (flags & XFS_DIFLAG_EXTSZINHERIT);
|
|
|
|
extsize_bytes = XFS_FSB_TO_B(mp, extsize);
|
|
|
|
|
|
|
|
if (rt_flag)
|
|
|
|
blocksize_bytes = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
|
|
|
|
else
|
|
|
|
blocksize_bytes = mp->m_sb.sb_blocksize;
|
|
|
|
|
|
|
|
if ((hint_flag || inherit_flag) && !(S_ISDIR(mode) || S_ISREG(mode)))
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (hint_flag && !S_ISREG(mode))
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (inherit_flag && !S_ISDIR(mode))
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if ((hint_flag || inherit_flag) && extsize == 0)
|
|
|
|
return __this_address;
|
|
|
|
|
2018-07-25 02:34:52 +08:00
|
|
|
/* free inodes get flags set to zero but extsize remains */
|
|
|
|
if (mode && !(hint_flag || inherit_flag) && extsize != 0)
|
2018-03-24 01:06:55 +08:00
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (extsize_bytes % blocksize_bytes)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (extsize > MAXEXTLEN)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (!rt_flag && extsize > mp->m_sb.sb_agblocks / 2)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Validate di_cowextsize hint.
|
|
|
|
*
|
|
|
|
* The rules are documented at xfs_ioctl_setattr_check_cowextsize().
|
|
|
|
* These functions must be kept in sync with each other.
|
|
|
|
*/
|
|
|
|
xfs_failaddr_t
|
|
|
|
xfs_inode_validate_cowextsize(
|
|
|
|
struct xfs_mount *mp,
|
|
|
|
uint32_t cowextsize,
|
|
|
|
uint16_t mode,
|
|
|
|
uint16_t flags,
|
|
|
|
uint64_t flags2)
|
|
|
|
{
|
|
|
|
bool rt_flag;
|
|
|
|
bool hint_flag;
|
|
|
|
uint32_t cowextsize_bytes;
|
|
|
|
|
|
|
|
rt_flag = (flags & XFS_DIFLAG_REALTIME);
|
|
|
|
hint_flag = (flags2 & XFS_DIFLAG2_COWEXTSIZE);
|
|
|
|
cowextsize_bytes = XFS_FSB_TO_B(mp, cowextsize);
|
|
|
|
|
|
|
|
if (hint_flag && !xfs_sb_version_hasreflink(&mp->m_sb))
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (hint_flag && !(S_ISDIR(mode) || S_ISREG(mode)))
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (hint_flag && cowextsize == 0)
|
|
|
|
return __this_address;
|
|
|
|
|
2018-07-25 02:34:52 +08:00
|
|
|
/* free inodes get flags set to zero but cowextsize remains */
|
|
|
|
if (mode && !hint_flag && cowextsize != 0)
|
2018-03-24 01:06:55 +08:00
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (hint_flag && rt_flag)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (cowextsize_bytes % mp->m_sb.sb_blocksize)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (cowextsize > MAXEXTLEN)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
if (cowextsize > mp->m_sb.sb_agblocks / 2)
|
|
|
|
return __this_address;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|