![Dave Chinner](/assets/img/avatar_default.png)
This debug code is called on every xfs_iflush() call, which then checks every inode in the buffer for non-zero unlinked list field. Hence it checks every inode in the cluster buffer every time a single inode on that cluster it flushed. This is resulting in: - 38.91% 5.33% [kernel] [k] xfs_iflush - 17.70% xfs_iflush - 9.93% xfs_inobp_check 4.36% xfs_buf_offset 10% of the CPU time spent flushing inodes is repeatedly checking unlinked fields in the buffer. We don't need to do this. The other place we call xfs_inobp_check() is xfs_iunlink_update_dinode(), and this is after we've done this assert for the agino we are about to write into that inode: ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino)); which means we've already checked that the agino we are about to write is not 0 on debug kernels. The inode buffer verifiers do everything else we need, so let's just remove this debug code. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
696 lines
19 KiB
C
696 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0
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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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#include "xfs_shared.h"
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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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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_errortag.h"
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#include "xfs_error.h"
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#include "xfs_icache.h"
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#include "xfs_trans.h"
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#include "xfs_ialloc.h"
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#include "xfs_dir2.h"
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#include <linux/iversion.h>
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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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* 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 unnecessary 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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* Changes to this readahead error behaviour also need to be reflected in
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* xfs_dquot_buf_readahead_verify().
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*/
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static void
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xfs_inode_buf_verify(
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struct xfs_buf *bp,
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bool readahead)
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{
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struct xfs_mount *mp = bp->b_mount;
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xfs_agnumber_t agno;
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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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agno = xfs_daddr_to_agno(mp, XFS_BUF_ADDR(bp));
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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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xfs_agino_t unlinked_ino;
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dip = xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog));
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unlinked_ino = be32_to_cpu(dip->di_next_unlinked);
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di_ok = xfs_verify_magic16(bp, dip->di_magic) &&
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xfs_dinode_good_version(&mp->m_sb, dip->di_version) &&
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xfs_verify_agino_or_null(mp, agno, unlinked_ino);
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if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
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XFS_ERRTAG_ITOBP_INOTOBP))) {
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if (readahead) {
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bp->b_flags &= ~XBF_DONE;
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xfs_buf_ioerror(bp, -EIO);
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return;
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}
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#ifdef DEBUG
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xfs_alert(mp,
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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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xfs_buf_verifier_error(bp, -EFSCORRUPTED,
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__func__, dip, sizeof(*dip),
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NULL);
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return;
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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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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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}
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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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xfs_inode_buf_verify(bp, false);
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}
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const struct xfs_buf_ops xfs_inode_buf_ops = {
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.name = "xfs_inode",
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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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.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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const struct xfs_buf_ops xfs_inode_buf_ra_ops = {
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.name = "xfs_inode_ra",
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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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.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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/*
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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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{
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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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ASSERT(error != -EAGAIN || (buf_flags & XBF_TRYLOCK));
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return error;
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}
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*bpp = bp;
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if (dipp)
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*dipp = xfs_buf_offset(bp, imap->im_boffset);
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return 0;
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}
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int
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xfs_inode_from_disk(
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struct xfs_inode *ip,
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struct xfs_dinode *from)
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{
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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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int error;
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xfs_failaddr_t fa;
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ASSERT(ip->i_cowfp == NULL);
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ASSERT(ip->i_afp == NULL);
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fa = xfs_dinode_verify(ip->i_mount, ip->i_ino, from);
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if (fa) {
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xfs_inode_verifier_error(ip, -EFSCORRUPTED, "dinode", from,
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sizeof(*from), fa);
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return -EFSCORRUPTED;
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}
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/*
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* First get the permanent information that is needed to allocate an
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* inode. If the inode is unused, mode is zero and we shouldn't mess
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* with the uninitialized part of it.
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*/
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to->di_flushiter = be16_to_cpu(from->di_flushiter);
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inode->i_generation = be32_to_cpu(from->di_gen);
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inode->i_mode = be16_to_cpu(from->di_mode);
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if (!inode->i_mode)
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return 0;
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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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* They will also be unconditionally written back to disk as v2 inodes.
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*/
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if (unlikely(from->di_version == 1)) {
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set_nlink(inode, be16_to_cpu(from->di_onlink));
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to->di_projid = 0;
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} else {
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set_nlink(inode, be32_to_cpu(from->di_nlink));
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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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}
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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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/*
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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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to->di_size = be64_to_cpu(from->di_size);
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to->di_nblocks = be64_to_cpu(from->di_nblocks);
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to->di_extsize = be32_to_cpu(from->di_extsize);
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to->di_forkoff = from->di_forkoff;
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to->di_dmevmask = be32_to_cpu(from->di_dmevmask);
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to->di_dmstate = be16_to_cpu(from->di_dmstate);
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to->di_flags = be16_to_cpu(from->di_flags);
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if (xfs_sb_version_has_v3inode(&ip->i_mount->m_sb)) {
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inode_set_iversion_queried(inode,
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be64_to_cpu(from->di_changecount));
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to->di_crtime.tv_sec = be32_to_cpu(from->di_crtime.t_sec);
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to->di_crtime.tv_nsec = be32_to_cpu(from->di_crtime.t_nsec);
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to->di_flags2 = be64_to_cpu(from->di_flags2);
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to->di_cowextsize = be32_to_cpu(from->di_cowextsize);
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}
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error = xfs_iformat_data_fork(ip, from);
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if (error)
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return error;
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if (from->di_forkoff) {
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error = xfs_iformat_attr_fork(ip, from);
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if (error)
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goto out_destroy_data_fork;
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}
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if (xfs_is_reflink_inode(ip))
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xfs_ifork_init_cow(ip);
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return 0;
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out_destroy_data_fork:
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xfs_idestroy_fork(&ip->i_df);
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return error;
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}
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void
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xfs_inode_to_disk(
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struct xfs_inode *ip,
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struct xfs_dinode *to,
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xfs_lsn_t lsn)
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{
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struct xfs_icdinode *from = &ip->i_d;
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struct inode *inode = VFS_I(ip);
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to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
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to->di_onlink = 0;
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to->di_format = xfs_ifork_format(&ip->i_df);
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to->di_uid = cpu_to_be32(i_uid_read(inode));
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to->di_gid = cpu_to_be32(i_gid_read(inode));
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to->di_projid_lo = cpu_to_be16(from->di_projid & 0xffff);
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to->di_projid_hi = cpu_to_be16(from->di_projid >> 16);
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memset(to->di_pad, 0, sizeof(to->di_pad));
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to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec);
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to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
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to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec);
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to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec);
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to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec);
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to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
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to->di_nlink = cpu_to_be32(inode->i_nlink);
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to->di_gen = cpu_to_be32(inode->i_generation);
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to->di_mode = cpu_to_be16(inode->i_mode);
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to->di_size = cpu_to_be64(from->di_size);
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to->di_nblocks = cpu_to_be64(from->di_nblocks);
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to->di_extsize = cpu_to_be32(from->di_extsize);
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to->di_nextents = cpu_to_be32(xfs_ifork_nextents(&ip->i_df));
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to->di_anextents = cpu_to_be16(xfs_ifork_nextents(ip->i_afp));
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to->di_forkoff = from->di_forkoff;
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to->di_aformat = xfs_ifork_format(ip->i_afp);
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to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
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to->di_dmstate = cpu_to_be16(from->di_dmstate);
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to->di_flags = cpu_to_be16(from->di_flags);
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if (xfs_sb_version_has_v3inode(&ip->i_mount->m_sb)) {
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to->di_version = 3;
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to->di_changecount = cpu_to_be64(inode_peek_iversion(inode));
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to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.tv_sec);
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to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.tv_nsec);
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to->di_flags2 = cpu_to_be64(from->di_flags2);
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to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
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to->di_ino = cpu_to_be64(ip->i_ino);
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to->di_lsn = cpu_to_be64(lsn);
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memset(to->di_pad2, 0, sizeof(to->di_pad2));
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uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
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to->di_flushiter = 0;
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} else {
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to->di_version = 2;
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to->di_flushiter = cpu_to_be16(from->di_flushiter);
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}
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}
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void
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xfs_log_dinode_to_disk(
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struct xfs_log_dinode *from,
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struct xfs_dinode *to)
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{
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to->di_magic = cpu_to_be16(from->di_magic);
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to->di_mode = cpu_to_be16(from->di_mode);
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to->di_version = from->di_version;
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to->di_format = from->di_format;
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to->di_onlink = 0;
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to->di_uid = cpu_to_be32(from->di_uid);
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to->di_gid = cpu_to_be32(from->di_gid);
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to->di_nlink = cpu_to_be32(from->di_nlink);
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to->di_projid_lo = cpu_to_be16(from->di_projid_lo);
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to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
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memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
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to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec);
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to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec);
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to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec);
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to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec);
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to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec);
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to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec);
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to->di_size = cpu_to_be64(from->di_size);
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to->di_nblocks = cpu_to_be64(from->di_nblocks);
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to->di_extsize = cpu_to_be32(from->di_extsize);
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to->di_nextents = cpu_to_be32(from->di_nextents);
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to->di_anextents = cpu_to_be16(from->di_anextents);
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to->di_forkoff = from->di_forkoff;
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to->di_aformat = from->di_aformat;
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to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
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to->di_dmstate = cpu_to_be16(from->di_dmstate);
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to->di_flags = cpu_to_be16(from->di_flags);
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to->di_gen = cpu_to_be32(from->di_gen);
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if (from->di_version == 3) {
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to->di_changecount = cpu_to_be64(from->di_changecount);
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to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
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to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
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to->di_flags2 = cpu_to_be64(from->di_flags2);
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to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
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to->di_ino = cpu_to_be64(from->di_ino);
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to->di_lsn = cpu_to_be64(from->di_lsn);
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memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
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uuid_copy(&to->di_uuid, &from->di_uuid);
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to->di_flushiter = 0;
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} else {
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to->di_flushiter = cpu_to_be16(from->di_flushiter);
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}
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}
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static xfs_failaddr_t
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xfs_dinode_verify_fork(
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struct xfs_dinode *dip,
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struct xfs_mount *mp,
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int whichfork)
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{
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uint32_t di_nextents = XFS_DFORK_NEXTENTS(dip, whichfork);
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switch (XFS_DFORK_FORMAT(dip, whichfork)) {
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case XFS_DINODE_FMT_LOCAL:
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/*
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* no local regular files yet
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*/
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if (whichfork == XFS_DATA_FORK) {
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if (S_ISREG(be16_to_cpu(dip->di_mode)))
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return __this_address;
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if (be64_to_cpu(dip->di_size) >
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XFS_DFORK_SIZE(dip, mp, whichfork))
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return __this_address;
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}
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if (di_nextents)
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return __this_address;
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break;
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case XFS_DINODE_FMT_EXTENTS:
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if (di_nextents > XFS_DFORK_MAXEXT(dip, mp, whichfork))
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return __this_address;
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break;
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case XFS_DINODE_FMT_BTREE:
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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;
|
|
}
|
|
|
|
static xfs_failaddr_t
|
|
xfs_dinode_verify_forkoff(
|
|
struct xfs_dinode *dip,
|
|
struct xfs_mount *mp)
|
|
{
|
|
if (!dip->di_forkoff)
|
|
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) >> 3))
|
|
return __this_address;
|
|
break;
|
|
default:
|
|
return __this_address;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
xfs_failaddr_t
|
|
xfs_dinode_verify(
|
|
struct xfs_mount *mp,
|
|
xfs_ino_t ino,
|
|
struct xfs_dinode *dip)
|
|
{
|
|
xfs_failaddr_t fa;
|
|
uint16_t mode;
|
|
uint16_t flags;
|
|
uint64_t flags2;
|
|
uint64_t di_size;
|
|
|
|
if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))
|
|
return __this_address;
|
|
|
|
/* Verify v3 integrity information first */
|
|
if (dip->di_version >= 3) {
|
|
if (!xfs_sb_version_has_v3inode(&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;
|
|
}
|
|
|
|
/* don't allow invalid i_size */
|
|
di_size = be64_to_cpu(dip->di_size);
|
|
if (di_size & (1ULL << 63))
|
|
return __this_address;
|
|
|
|
mode = be16_to_cpu(dip->di_mode);
|
|
if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN)
|
|
return __this_address;
|
|
|
|
/* No zero-length symlinks/dirs. */
|
|
if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0)
|
|
return __this_address;
|
|
|
|
/* 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;
|
|
|
|
/* check for illegal values of forkoff */
|
|
fa = xfs_dinode_verify_forkoff(dip, mp);
|
|
if (fa)
|
|
return fa;
|
|
|
|
/* 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:
|
|
fa = xfs_dinode_verify_fork(dip, mp, XFS_DATA_FORK);
|
|
if (fa)
|
|
return fa;
|
|
break;
|
|
case 0:
|
|
/* Uninitialized inode ok. */
|
|
break;
|
|
default:
|
|
return __this_address;
|
|
}
|
|
|
|
if (dip->di_forkoff) {
|
|
fa = xfs_dinode_verify_fork(dip, mp, XFS_ATTR_FORK);
|
|
if (fa)
|
|
return fa;
|
|
} 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;
|
|
}
|
|
|
|
/* extent size hint validation */
|
|
fa = xfs_inode_validate_extsize(mp, be32_to_cpu(dip->di_extsize),
|
|
mode, flags);
|
|
if (fa)
|
|
return fa;
|
|
|
|
/* only version 3 or greater inodes are extensively verified here */
|
|
if (dip->di_version < 3)
|
|
return NULL;
|
|
|
|
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)) &&
|
|
!xfs_sb_version_hasreflink(&mp->m_sb))
|
|
return __this_address;
|
|
|
|
/* only regular files get reflink */
|
|
if ((flags2 & XFS_DIFLAG2_REFLINK) && (mode & S_IFMT) != S_IFREG)
|
|
return __this_address;
|
|
|
|
/* don't let reflink and realtime mix */
|
|
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME))
|
|
return __this_address;
|
|
|
|
/* don't let reflink and dax mix */
|
|
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX))
|
|
return __this_address;
|
|
|
|
/* COW extent size hint validation */
|
|
fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
|
|
mode, flags, flags2);
|
|
if (fa)
|
|
return fa;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
xfs_dinode_calc_crc(
|
|
struct xfs_mount *mp,
|
|
struct xfs_dinode *dip)
|
|
{
|
|
uint32_t crc;
|
|
|
|
if (dip->di_version < 3)
|
|
return;
|
|
|
|
ASSERT(xfs_sb_version_hascrc(&mp->m_sb));
|
|
crc = xfs_start_cksum_update((char *)dip, mp->m_sb.sb_inodesize,
|
|
XFS_DINODE_CRC_OFF);
|
|
dip->di_crc = xfs_end_cksum(crc);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* free inodes get flags set to zero but extsize remains */
|
|
if (mode && !(hint_flag || inherit_flag) && extsize != 0)
|
|
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;
|
|
|
|
/* free inodes get flags set to zero but cowextsize remains */
|
|
if (mode && !hint_flag && cowextsize != 0)
|
|
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;
|
|
}
|