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xfs: repair inode records
If an inode is so badly damaged that it cannot be loaded into the cache, fix the ondisk metadata and try again. If there /is/ a cached inode, fix any problems and apply any optimizations that can be solved incore. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
parent
d9041681dd
commit
2d295fe657
@ -184,6 +184,7 @@ xfs-y += $(addprefix scrub/, \
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agheader_repair.o \
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alloc_repair.o \
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ialloc_repair.o \
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inode_repair.o \
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newbt.o \
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reap.o \
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refcount_repair.o \
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@ -25,6 +25,7 @@
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#include "scrub/common.h"
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#include "scrub/btree.h"
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#include "scrub/trace.h"
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#include "scrub/repair.h"
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/* Prepare the attached inode for scrubbing. */
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static inline int
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@ -185,8 +186,11 @@ xchk_setup_inode(
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* saying the inode is allocated and the icache being unable to load
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* the inode until we can flag the corruption in xchk_inode. The
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* scrub function has to note the corruption, since we're not really
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* supposed to do that from the setup function.
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* supposed to do that from the setup function. Save the mapping to
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* make repairs to the ondisk inode buffer.
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*/
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if (xchk_could_repair(sc))
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xrep_setup_inode(sc, &imap);
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return 0;
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out_cancel:
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820
fs/xfs/scrub/inode_repair.c
Normal file
820
fs/xfs/scrub/inode_repair.c
Normal file
@ -0,0 +1,820 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2018-2023 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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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_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_defer.h"
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#include "xfs_btree.h"
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#include "xfs_bit.h"
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#include "xfs_log_format.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_inode.h"
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#include "xfs_icache.h"
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#include "xfs_inode_buf.h"
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#include "xfs_inode_fork.h"
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#include "xfs_ialloc.h"
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#include "xfs_da_format.h"
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#include "xfs_reflink.h"
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#include "xfs_rmap.h"
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#include "xfs_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_dir2.h"
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#include "xfs_dir2_priv.h"
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#include "xfs_quota_defs.h"
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#include "xfs_quota.h"
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#include "xfs_ag.h"
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#include "xfs_rtbitmap.h"
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#include "xfs_health.h"
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#include "scrub/xfs_scrub.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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#include "scrub/btree.h"
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#include "scrub/trace.h"
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#include "scrub/repair.h"
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/*
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* Inode Record Repair
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* ===================
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*
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* Roughly speaking, inode problems can be classified based on whether or not
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* they trip the dinode verifiers. If those trip, then we won't be able to
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* xfs_iget ourselves the inode.
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*
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* Therefore, the xrep_dinode_* functions fix anything that will cause the
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* inode buffer verifier or the dinode verifier. The xrep_inode_* functions
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* fix things on live incore inodes. The inode repair functions make decisions
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* with security and usability implications when reviving a file:
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*
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* - Files with zero di_mode or a garbage di_mode are converted to regular file
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* that only root can read. This file may not actually contain user data,
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* if the file was not previously a regular file. Setuid and setgid bits
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* are cleared.
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*
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* - Zero-size directories can be truncated to look empty. It is necessary to
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* run the bmapbtd and directory repair functions to fully rebuild the
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* directory.
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*
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* - Zero-size symbolic link targets can be truncated to '?'. It is necessary
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* to run the bmapbtd and symlink repair functions to salvage the symlink.
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*
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* - Invalid extent size hints will be removed.
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*
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* - Quotacheck will be scheduled if we repaired an inode that was so badly
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* damaged that the ondisk inode had to be rebuilt.
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*
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* - Invalid user, group, or project IDs (aka -1U) will be reset to zero.
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* Setuid and setgid bits are cleared.
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*/
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/*
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* All the information we need to repair the ondisk inode if we can't iget the
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* incore inode. We don't allocate this buffer unless we're going to perform
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* a repair to the ondisk inode cluster buffer.
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*/
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struct xrep_inode {
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/* Inode mapping that we saved from the initial lookup attempt. */
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struct xfs_imap imap;
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struct xfs_scrub *sc;
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/* Sick state to set after zapping parts of the inode. */
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unsigned int ino_sick_mask;
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};
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/*
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* Setup function for inode repair. @imap contains the ondisk inode mapping
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* information so that we can correct the ondisk inode cluster buffer if
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* necessary to make iget work.
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*/
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int
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xrep_setup_inode(
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struct xfs_scrub *sc,
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const struct xfs_imap *imap)
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{
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struct xrep_inode *ri;
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sc->buf = kzalloc(sizeof(struct xrep_inode), XCHK_GFP_FLAGS);
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if (!sc->buf)
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return -ENOMEM;
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ri = sc->buf;
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memcpy(&ri->imap, imap, sizeof(struct xfs_imap));
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ri->sc = sc;
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return 0;
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}
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/*
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* Make sure this ondisk inode can pass the inode buffer verifier. This is
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* not the same as the dinode verifier.
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*/
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STATIC void
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xrep_dinode_buf_core(
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struct xfs_scrub *sc,
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struct xfs_buf *bp,
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unsigned int ioffset)
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{
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struct xfs_dinode *dip = xfs_buf_offset(bp, ioffset);
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struct xfs_trans *tp = sc->tp;
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struct xfs_mount *mp = sc->mp;
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xfs_agino_t agino;
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bool crc_ok = false;
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bool magic_ok = false;
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bool unlinked_ok = false;
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agino = be32_to_cpu(dip->di_next_unlinked);
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if (xfs_verify_agino_or_null(bp->b_pag, agino))
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unlinked_ok = true;
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if (dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) &&
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xfs_dinode_good_version(mp, dip->di_version))
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magic_ok = true;
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if (xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
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XFS_DINODE_CRC_OFF))
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crc_ok = true;
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if (magic_ok && unlinked_ok && crc_ok)
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return;
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if (!magic_ok) {
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dip->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
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dip->di_version = 3;
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}
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if (!unlinked_ok)
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dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
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xfs_dinode_calc_crc(mp, dip);
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xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
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xfs_trans_log_buf(tp, bp, ioffset,
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ioffset + sizeof(struct xfs_dinode) - 1);
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}
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/* Make sure this inode cluster buffer can pass the inode buffer verifier. */
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STATIC void
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xrep_dinode_buf(
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struct xfs_scrub *sc,
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struct xfs_buf *bp)
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{
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struct xfs_mount *mp = sc->mp;
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int i;
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int ni;
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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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xrep_dinode_buf_core(sc, bp, i << mp->m_sb.sb_inodelog);
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}
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/* Reinitialize things that never change in an inode. */
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STATIC void
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xrep_dinode_header(
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struct xfs_scrub *sc,
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struct xfs_dinode *dip)
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{
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trace_xrep_dinode_header(sc, dip);
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dip->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
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if (!xfs_dinode_good_version(sc->mp, dip->di_version))
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dip->di_version = 3;
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dip->di_ino = cpu_to_be64(sc->sm->sm_ino);
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uuid_copy(&dip->di_uuid, &sc->mp->m_sb.sb_meta_uuid);
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dip->di_gen = cpu_to_be32(sc->sm->sm_gen);
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}
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/* Turn di_mode into /something/ recognizable. */
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STATIC void
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xrep_dinode_mode(
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struct xfs_scrub *sc,
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struct xfs_dinode *dip)
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{
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uint16_t mode = be16_to_cpu(dip->di_mode);
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trace_xrep_dinode_mode(sc, dip);
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if (mode == 0 || xfs_mode_to_ftype(mode) != XFS_DIR3_FT_UNKNOWN)
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return;
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/* bad mode, so we set it to a file that only root can read */
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mode = S_IFREG;
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dip->di_mode = cpu_to_be16(mode);
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dip->di_uid = 0;
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dip->di_gid = 0;
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}
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/* Fix any conflicting flags that the verifiers complain about. */
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STATIC void
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xrep_dinode_flags(
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struct xfs_scrub *sc,
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struct xfs_dinode *dip)
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{
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struct xfs_mount *mp = sc->mp;
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uint64_t flags2 = be64_to_cpu(dip->di_flags2);
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uint16_t flags = be16_to_cpu(dip->di_flags);
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uint16_t mode = be16_to_cpu(dip->di_mode);
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trace_xrep_dinode_flags(sc, dip);
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/*
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* For regular files on a reflink filesystem, set the REFLINK flag to
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* protect shared extents. A later stage will actually check those
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* extents and clear the flag if possible.
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*/
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if (xfs_has_reflink(mp) && S_ISREG(mode))
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flags2 |= XFS_DIFLAG2_REFLINK;
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else
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flags2 &= ~(XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE);
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if (flags & XFS_DIFLAG_REALTIME)
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flags2 &= ~XFS_DIFLAG2_REFLINK;
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if (!xfs_has_bigtime(mp))
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flags2 &= ~XFS_DIFLAG2_BIGTIME;
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if (!xfs_has_large_extent_counts(mp))
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flags2 &= ~XFS_DIFLAG2_NREXT64;
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if (flags2 & XFS_DIFLAG2_NREXT64)
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dip->di_nrext64_pad = 0;
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else if (dip->di_version >= 3)
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dip->di_v3_pad = 0;
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dip->di_flags = cpu_to_be16(flags);
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dip->di_flags2 = cpu_to_be64(flags2);
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}
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/*
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* Blow out symlink; now it points nowhere. We don't have to worry about
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* incore state because this inode is failing the verifiers.
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*/
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STATIC void
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xrep_dinode_zap_symlink(
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struct xrep_inode *ri,
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struct xfs_dinode *dip)
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{
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struct xfs_scrub *sc = ri->sc;
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char *p;
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trace_xrep_dinode_zap_symlink(sc, dip);
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dip->di_format = XFS_DINODE_FMT_LOCAL;
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dip->di_size = cpu_to_be64(1);
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p = XFS_DFORK_PTR(dip, XFS_DATA_FORK);
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*p = '?';
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ri->ino_sick_mask |= XFS_SICK_INO_SYMLINK_ZAPPED;
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}
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/*
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* Blow out dir, make the parent point to the root. In the future repair will
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* reconstruct this directory for us. Note that there's no in-core directory
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* inode because the sf verifier tripped, so we don't have to worry about the
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* dentry cache.
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*/
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STATIC void
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xrep_dinode_zap_dir(
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struct xrep_inode *ri,
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struct xfs_dinode *dip)
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{
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struct xfs_scrub *sc = ri->sc;
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struct xfs_mount *mp = sc->mp;
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struct xfs_dir2_sf_hdr *sfp;
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int i8count;
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trace_xrep_dinode_zap_dir(sc, dip);
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dip->di_format = XFS_DINODE_FMT_LOCAL;
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i8count = mp->m_sb.sb_rootino > XFS_DIR2_MAX_SHORT_INUM;
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sfp = XFS_DFORK_PTR(dip, XFS_DATA_FORK);
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sfp->count = 0;
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sfp->i8count = i8count;
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xfs_dir2_sf_put_parent_ino(sfp, mp->m_sb.sb_rootino);
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dip->di_size = cpu_to_be64(xfs_dir2_sf_hdr_size(i8count));
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ri->ino_sick_mask |= XFS_SICK_INO_DIR_ZAPPED;
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}
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/* Make sure we don't have a garbage file size. */
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STATIC void
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xrep_dinode_size(
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struct xrep_inode *ri,
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struct xfs_dinode *dip)
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{
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struct xfs_scrub *sc = ri->sc;
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uint64_t size = be64_to_cpu(dip->di_size);
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uint16_t mode = be16_to_cpu(dip->di_mode);
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trace_xrep_dinode_size(sc, dip);
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switch (mode & S_IFMT) {
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case S_IFIFO:
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case S_IFCHR:
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case S_IFBLK:
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case S_IFSOCK:
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/* di_size can't be nonzero for special files */
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dip->di_size = 0;
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break;
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case S_IFREG:
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/* Regular files can't be larger than 2^63-1 bytes. */
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dip->di_size = cpu_to_be64(size & ~(1ULL << 63));
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break;
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case S_IFLNK:
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/*
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* Truncate ridiculously oversized symlinks. If the size is
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* zero, reset it to point to the current directory. Both of
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* these conditions trigger dinode verifier errors, so there
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* is no in-core state to reset.
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*/
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if (size > XFS_SYMLINK_MAXLEN)
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dip->di_size = cpu_to_be64(XFS_SYMLINK_MAXLEN);
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else if (size == 0)
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xrep_dinode_zap_symlink(ri, dip);
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break;
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case S_IFDIR:
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/*
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* Directories can't have a size larger than 32G. If the size
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* is zero, reset it to an empty directory. Both of these
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* conditions trigger dinode verifier errors, so there is no
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* in-core state to reset.
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*/
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if (size > XFS_DIR2_SPACE_SIZE)
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dip->di_size = cpu_to_be64(XFS_DIR2_SPACE_SIZE);
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else if (size == 0)
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xrep_dinode_zap_dir(ri, dip);
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break;
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}
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}
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/* Fix extent size hints. */
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STATIC void
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xrep_dinode_extsize_hints(
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struct xfs_scrub *sc,
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struct xfs_dinode *dip)
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{
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struct xfs_mount *mp = sc->mp;
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uint64_t flags2 = be64_to_cpu(dip->di_flags2);
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uint16_t flags = be16_to_cpu(dip->di_flags);
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uint16_t mode = be16_to_cpu(dip->di_mode);
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xfs_failaddr_t fa;
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trace_xrep_dinode_extsize_hints(sc, dip);
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fa = xfs_inode_validate_extsize(mp, be32_to_cpu(dip->di_extsize),
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mode, flags);
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if (fa) {
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dip->di_extsize = 0;
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dip->di_flags &= ~cpu_to_be16(XFS_DIFLAG_EXTSIZE |
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XFS_DIFLAG_EXTSZINHERIT);
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}
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if (dip->di_version < 3)
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return;
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fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
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mode, flags, flags2);
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if (fa) {
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dip->di_cowextsize = 0;
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dip->di_flags2 &= ~cpu_to_be64(XFS_DIFLAG2_COWEXTSIZE);
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}
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}
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/* Inode didn't pass dinode verifiers, so fix the raw buffer and retry iget. */
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STATIC int
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xrep_dinode_core(
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struct xrep_inode *ri)
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{
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struct xfs_scrub *sc = ri->sc;
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struct xfs_buf *bp;
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struct xfs_dinode *dip;
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xfs_ino_t ino = sc->sm->sm_ino;
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int error;
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int iget_error;
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/* Read the inode cluster buffer. */
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error = xfs_trans_read_buf(sc->mp, sc->tp, sc->mp->m_ddev_targp,
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ri->imap.im_blkno, ri->imap.im_len, XBF_UNMAPPED, &bp,
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NULL);
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if (error)
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return error;
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/* Make sure we can pass the inode buffer verifier. */
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xrep_dinode_buf(sc, bp);
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bp->b_ops = &xfs_inode_buf_ops;
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/* Fix everything the verifier will complain about. */
|
||||
dip = xfs_buf_offset(bp, ri->imap.im_boffset);
|
||||
xrep_dinode_header(sc, dip);
|
||||
xrep_dinode_mode(sc, dip);
|
||||
xrep_dinode_flags(sc, dip);
|
||||
xrep_dinode_size(ri, dip);
|
||||
xrep_dinode_extsize_hints(sc, dip);
|
||||
|
||||
/* Write out the inode. */
|
||||
trace_xrep_dinode_fixed(sc, dip);
|
||||
xfs_dinode_calc_crc(sc->mp, dip);
|
||||
xfs_trans_buf_set_type(sc->tp, bp, XFS_BLFT_DINO_BUF);
|
||||
xfs_trans_log_buf(sc->tp, bp, ri->imap.im_boffset,
|
||||
ri->imap.im_boffset + sc->mp->m_sb.sb_inodesize - 1);
|
||||
|
||||
/*
|
||||
* In theory, we've fixed the ondisk inode record enough that we should
|
||||
* be able to load the inode into the cache. Try to iget that inode
|
||||
* now while we hold the AGI and the inode cluster buffer and take the
|
||||
* IOLOCK so that we can continue with repairs without anyone else
|
||||
* accessing the inode. If iget fails, we still need to commit the
|
||||
* changes.
|
||||
*/
|
||||
iget_error = xchk_iget(sc, ino, &sc->ip);
|
||||
if (!iget_error)
|
||||
xchk_ilock(sc, XFS_IOLOCK_EXCL);
|
||||
|
||||
/*
|
||||
* Commit the inode cluster buffer updates and drop the AGI buffer that
|
||||
* we've been holding since scrub setup. From here on out, repairs
|
||||
* deal only with the cached inode.
|
||||
*/
|
||||
error = xrep_trans_commit(sc);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
if (iget_error)
|
||||
return iget_error;
|
||||
|
||||
error = xchk_trans_alloc(sc, 0);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = xrep_ino_dqattach(sc);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
xchk_ilock(sc, XFS_ILOCK_EXCL);
|
||||
if (ri->ino_sick_mask)
|
||||
xfs_inode_mark_sick(sc->ip, ri->ino_sick_mask);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Fix everything xfs_dinode_verify cares about. */
|
||||
STATIC int
|
||||
xrep_dinode_problems(
|
||||
struct xrep_inode *ri)
|
||||
{
|
||||
struct xfs_scrub *sc = ri->sc;
|
||||
int error;
|
||||
|
||||
error = xrep_dinode_core(ri);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
/* We had to fix a totally busted inode, schedule quotacheck. */
|
||||
if (XFS_IS_UQUOTA_ON(sc->mp))
|
||||
xrep_force_quotacheck(sc, XFS_DQTYPE_USER);
|
||||
if (XFS_IS_GQUOTA_ON(sc->mp))
|
||||
xrep_force_quotacheck(sc, XFS_DQTYPE_GROUP);
|
||||
if (XFS_IS_PQUOTA_ON(sc->mp))
|
||||
xrep_force_quotacheck(sc, XFS_DQTYPE_PROJ);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Fix problems that the verifiers don't care about. In general these are
|
||||
* errors that don't cause problems elsewhere in the kernel that we can easily
|
||||
* detect, so we don't check them all that rigorously.
|
||||
*/
|
||||
|
||||
/* Make sure block and extent counts are ok. */
|
||||
STATIC int
|
||||
xrep_inode_blockcounts(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
struct xfs_ifork *ifp;
|
||||
xfs_filblks_t count;
|
||||
xfs_filblks_t acount;
|
||||
xfs_extnum_t nextents;
|
||||
int error;
|
||||
|
||||
trace_xrep_inode_blockcounts(sc);
|
||||
|
||||
/* Set data fork counters from the data fork mappings. */
|
||||
error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_DATA_FORK,
|
||||
&nextents, &count);
|
||||
if (error)
|
||||
return error;
|
||||
if (xfs_is_reflink_inode(sc->ip)) {
|
||||
/*
|
||||
* data fork blockcount can exceed physical storage if a user
|
||||
* reflinks the same block over and over again.
|
||||
*/
|
||||
;
|
||||
} else if (XFS_IS_REALTIME_INODE(sc->ip)) {
|
||||
if (count >= sc->mp->m_sb.sb_rblocks)
|
||||
return -EFSCORRUPTED;
|
||||
} else {
|
||||
if (count >= sc->mp->m_sb.sb_dblocks)
|
||||
return -EFSCORRUPTED;
|
||||
}
|
||||
error = xrep_ino_ensure_extent_count(sc, XFS_DATA_FORK, nextents);
|
||||
if (error)
|
||||
return error;
|
||||
sc->ip->i_df.if_nextents = nextents;
|
||||
|
||||
/* Set attr fork counters from the attr fork mappings. */
|
||||
ifp = xfs_ifork_ptr(sc->ip, XFS_ATTR_FORK);
|
||||
if (ifp) {
|
||||
error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_ATTR_FORK,
|
||||
&nextents, &acount);
|
||||
if (error)
|
||||
return error;
|
||||
if (count >= sc->mp->m_sb.sb_dblocks)
|
||||
return -EFSCORRUPTED;
|
||||
error = xrep_ino_ensure_extent_count(sc, XFS_ATTR_FORK,
|
||||
nextents);
|
||||
if (error)
|
||||
return error;
|
||||
ifp->if_nextents = nextents;
|
||||
} else {
|
||||
acount = 0;
|
||||
}
|
||||
|
||||
sc->ip->i_nblocks = count + acount;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Check for invalid uid/gid/prid. */
|
||||
STATIC void
|
||||
xrep_inode_ids(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
bool dirty = false;
|
||||
|
||||
trace_xrep_inode_ids(sc);
|
||||
|
||||
if (!uid_valid(VFS_I(sc->ip)->i_uid)) {
|
||||
i_uid_write(VFS_I(sc->ip), 0);
|
||||
dirty = true;
|
||||
if (XFS_IS_UQUOTA_ON(sc->mp))
|
||||
xrep_force_quotacheck(sc, XFS_DQTYPE_USER);
|
||||
}
|
||||
|
||||
if (!gid_valid(VFS_I(sc->ip)->i_gid)) {
|
||||
i_gid_write(VFS_I(sc->ip), 0);
|
||||
dirty = true;
|
||||
if (XFS_IS_GQUOTA_ON(sc->mp))
|
||||
xrep_force_quotacheck(sc, XFS_DQTYPE_GROUP);
|
||||
}
|
||||
|
||||
if (sc->ip->i_projid == -1U) {
|
||||
sc->ip->i_projid = 0;
|
||||
dirty = true;
|
||||
if (XFS_IS_PQUOTA_ON(sc->mp))
|
||||
xrep_force_quotacheck(sc, XFS_DQTYPE_PROJ);
|
||||
}
|
||||
|
||||
/* strip setuid/setgid if we touched any of the ids */
|
||||
if (dirty)
|
||||
VFS_I(sc->ip)->i_mode &= ~(S_ISUID | S_ISGID);
|
||||
}
|
||||
|
||||
static inline void
|
||||
xrep_clamp_timestamp(
|
||||
struct xfs_inode *ip,
|
||||
struct timespec64 *ts)
|
||||
{
|
||||
ts->tv_nsec = clamp_t(long, ts->tv_nsec, 0, NSEC_PER_SEC);
|
||||
*ts = timestamp_truncate(*ts, VFS_I(ip));
|
||||
}
|
||||
|
||||
/* Nanosecond counters can't have more than 1 billion. */
|
||||
STATIC void
|
||||
xrep_inode_timestamps(
|
||||
struct xfs_inode *ip)
|
||||
{
|
||||
struct timespec64 tstamp;
|
||||
struct inode *inode = VFS_I(ip);
|
||||
|
||||
tstamp = inode_get_atime(inode);
|
||||
xrep_clamp_timestamp(ip, &tstamp);
|
||||
inode_set_atime_to_ts(inode, tstamp);
|
||||
|
||||
tstamp = inode_get_mtime(inode);
|
||||
xrep_clamp_timestamp(ip, &tstamp);
|
||||
inode_set_mtime_to_ts(inode, tstamp);
|
||||
|
||||
tstamp = inode_get_ctime(inode);
|
||||
xrep_clamp_timestamp(ip, &tstamp);
|
||||
inode_set_ctime_to_ts(inode, tstamp);
|
||||
|
||||
xrep_clamp_timestamp(ip, &ip->i_crtime);
|
||||
}
|
||||
|
||||
/* Fix inode flags that don't make sense together. */
|
||||
STATIC void
|
||||
xrep_inode_flags(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
uint16_t mode;
|
||||
|
||||
trace_xrep_inode_flags(sc);
|
||||
|
||||
mode = VFS_I(sc->ip)->i_mode;
|
||||
|
||||
/* Clear junk flags */
|
||||
if (sc->ip->i_diflags & ~XFS_DIFLAG_ANY)
|
||||
sc->ip->i_diflags &= ~XFS_DIFLAG_ANY;
|
||||
|
||||
/* NEWRTBM only applies to realtime bitmaps */
|
||||
if (sc->ip->i_ino == sc->mp->m_sb.sb_rbmino)
|
||||
sc->ip->i_diflags |= XFS_DIFLAG_NEWRTBM;
|
||||
else
|
||||
sc->ip->i_diflags &= ~XFS_DIFLAG_NEWRTBM;
|
||||
|
||||
/* These only make sense for directories. */
|
||||
if (!S_ISDIR(mode))
|
||||
sc->ip->i_diflags &= ~(XFS_DIFLAG_RTINHERIT |
|
||||
XFS_DIFLAG_EXTSZINHERIT |
|
||||
XFS_DIFLAG_PROJINHERIT |
|
||||
XFS_DIFLAG_NOSYMLINKS);
|
||||
|
||||
/* These only make sense for files. */
|
||||
if (!S_ISREG(mode))
|
||||
sc->ip->i_diflags &= ~(XFS_DIFLAG_REALTIME |
|
||||
XFS_DIFLAG_EXTSIZE);
|
||||
|
||||
/* These only make sense for non-rt files. */
|
||||
if (sc->ip->i_diflags & XFS_DIFLAG_REALTIME)
|
||||
sc->ip->i_diflags &= ~XFS_DIFLAG_FILESTREAM;
|
||||
|
||||
/* Immutable and append only? Drop the append. */
|
||||
if ((sc->ip->i_diflags & XFS_DIFLAG_IMMUTABLE) &&
|
||||
(sc->ip->i_diflags & XFS_DIFLAG_APPEND))
|
||||
sc->ip->i_diflags &= ~XFS_DIFLAG_APPEND;
|
||||
|
||||
/* Clear junk flags. */
|
||||
if (sc->ip->i_diflags2 & ~XFS_DIFLAG2_ANY)
|
||||
sc->ip->i_diflags2 &= ~XFS_DIFLAG2_ANY;
|
||||
|
||||
/* No reflink flag unless we support it and it's a file. */
|
||||
if (!xfs_has_reflink(sc->mp) || !S_ISREG(mode))
|
||||
sc->ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
|
||||
|
||||
/* DAX only applies to files and dirs. */
|
||||
if (!(S_ISREG(mode) || S_ISDIR(mode)))
|
||||
sc->ip->i_diflags2 &= ~XFS_DIFLAG2_DAX;
|
||||
|
||||
/* No reflink files on the realtime device. */
|
||||
if (sc->ip->i_diflags & XFS_DIFLAG_REALTIME)
|
||||
sc->ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
|
||||
}
|
||||
|
||||
/*
|
||||
* Fix size problems with block/node format directories. If we fail to find
|
||||
* the extent list, just bail out and let the bmapbtd repair functions clean
|
||||
* up that mess.
|
||||
*/
|
||||
STATIC void
|
||||
xrep_inode_blockdir_size(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
struct xfs_iext_cursor icur;
|
||||
struct xfs_bmbt_irec got;
|
||||
struct xfs_ifork *ifp;
|
||||
xfs_fileoff_t off;
|
||||
int error;
|
||||
|
||||
trace_xrep_inode_blockdir_size(sc);
|
||||
|
||||
error = xfs_iread_extents(sc->tp, sc->ip, XFS_DATA_FORK);
|
||||
if (error)
|
||||
return;
|
||||
|
||||
/* Find the last block before 32G; this is the dir size. */
|
||||
ifp = xfs_ifork_ptr(sc->ip, XFS_DATA_FORK);
|
||||
off = XFS_B_TO_FSB(sc->mp, XFS_DIR2_SPACE_SIZE);
|
||||
if (!xfs_iext_lookup_extent_before(sc->ip, ifp, &off, &icur, &got)) {
|
||||
/* zero-extents directory? */
|
||||
return;
|
||||
}
|
||||
|
||||
off = got.br_startoff + got.br_blockcount;
|
||||
sc->ip->i_disk_size = min_t(loff_t, XFS_DIR2_SPACE_SIZE,
|
||||
XFS_FSB_TO_B(sc->mp, off));
|
||||
}
|
||||
|
||||
/* Fix size problems with short format directories. */
|
||||
STATIC void
|
||||
xrep_inode_sfdir_size(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
struct xfs_ifork *ifp;
|
||||
|
||||
trace_xrep_inode_sfdir_size(sc);
|
||||
|
||||
ifp = xfs_ifork_ptr(sc->ip, XFS_DATA_FORK);
|
||||
sc->ip->i_disk_size = ifp->if_bytes;
|
||||
}
|
||||
|
||||
/*
|
||||
* Fix any irregularities in a directory inode's size now that we can iterate
|
||||
* extent maps and access other regular inode data.
|
||||
*/
|
||||
STATIC void
|
||||
xrep_inode_dir_size(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
trace_xrep_inode_dir_size(sc);
|
||||
|
||||
switch (sc->ip->i_df.if_format) {
|
||||
case XFS_DINODE_FMT_EXTENTS:
|
||||
case XFS_DINODE_FMT_BTREE:
|
||||
xrep_inode_blockdir_size(sc);
|
||||
break;
|
||||
case XFS_DINODE_FMT_LOCAL:
|
||||
xrep_inode_sfdir_size(sc);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Fix extent size hint problems. */
|
||||
STATIC void
|
||||
xrep_inode_extsize(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
/* Fix misaligned extent size hints on a directory. */
|
||||
if ((sc->ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
|
||||
(sc->ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) &&
|
||||
xfs_extlen_to_rtxmod(sc->mp, sc->ip->i_extsize) > 0) {
|
||||
sc->ip->i_extsize = 0;
|
||||
sc->ip->i_diflags &= ~XFS_DIFLAG_EXTSZINHERIT;
|
||||
}
|
||||
}
|
||||
|
||||
/* Fix any irregularities in an inode that the verifiers don't catch. */
|
||||
STATIC int
|
||||
xrep_inode_problems(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = xrep_inode_blockcounts(sc);
|
||||
if (error)
|
||||
return error;
|
||||
xrep_inode_timestamps(sc->ip);
|
||||
xrep_inode_flags(sc);
|
||||
xrep_inode_ids(sc);
|
||||
/*
|
||||
* We can now do a better job fixing the size of a directory now that
|
||||
* we can scan the data fork extents than we could in xrep_dinode_size.
|
||||
*/
|
||||
if (S_ISDIR(VFS_I(sc->ip)->i_mode))
|
||||
xrep_inode_dir_size(sc);
|
||||
xrep_inode_extsize(sc);
|
||||
|
||||
trace_xrep_inode_fixed(sc);
|
||||
xfs_trans_log_inode(sc->tp, sc->ip, XFS_ILOG_CORE);
|
||||
return xrep_roll_trans(sc);
|
||||
}
|
||||
|
||||
/* Repair an inode's fields. */
|
||||
int
|
||||
xrep_inode(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
int error = 0;
|
||||
|
||||
/*
|
||||
* No inode? That means we failed the _iget verifiers. Repair all
|
||||
* the things that the inode verifiers care about, then retry _iget.
|
||||
*/
|
||||
if (!sc->ip) {
|
||||
struct xrep_inode *ri = sc->buf;
|
||||
|
||||
ASSERT(ri != NULL);
|
||||
|
||||
error = xrep_dinode_problems(ri);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
/* By this point we had better have a working incore inode. */
|
||||
if (!sc->ip)
|
||||
return -EFSCORRUPTED;
|
||||
}
|
||||
|
||||
xfs_trans_ijoin(sc->tp, sc->ip, 0);
|
||||
|
||||
/* If we found corruption of any kind, try to fix it. */
|
||||
if ((sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT) ||
|
||||
(sc->sm->sm_flags & XFS_SCRUB_OFLAG_XCORRUPT)) {
|
||||
error = xrep_inode_problems(sc);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
/* See if we can clear the reflink flag. */
|
||||
if (xfs_is_reflink_inode(sc->ip)) {
|
||||
error = xfs_reflink_clear_inode_flag(sc->ip, &sc->tp);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
return xrep_defer_finish(sc);
|
||||
}
|
@ -176,6 +176,16 @@ xrep_roll_ag_trans(
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Roll the scrub transaction, holding the primary metadata locked. */
|
||||
int
|
||||
xrep_roll_trans(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
if (!sc->ip)
|
||||
return xrep_roll_ag_trans(sc);
|
||||
return xfs_trans_roll_inode(&sc->tp, sc->ip);
|
||||
}
|
||||
|
||||
/* Finish all deferred work attached to the repair transaction. */
|
||||
int
|
||||
xrep_defer_finish(
|
||||
@ -740,6 +750,38 @@ xrep_ino_dqattach(
|
||||
}
|
||||
#endif /* CONFIG_XFS_QUOTA */
|
||||
|
||||
/*
|
||||
* Ensure that the inode being repaired is ready to handle a certain number of
|
||||
* extents, or return EFSCORRUPTED. Caller must hold the ILOCK of the inode
|
||||
* being repaired and have joined it to the scrub transaction.
|
||||
*/
|
||||
int
|
||||
xrep_ino_ensure_extent_count(
|
||||
struct xfs_scrub *sc,
|
||||
int whichfork,
|
||||
xfs_extnum_t nextents)
|
||||
{
|
||||
xfs_extnum_t max_extents;
|
||||
bool inode_has_nrext64;
|
||||
|
||||
inode_has_nrext64 = xfs_inode_has_large_extent_counts(sc->ip);
|
||||
max_extents = xfs_iext_max_nextents(inode_has_nrext64, whichfork);
|
||||
if (nextents <= max_extents)
|
||||
return 0;
|
||||
if (inode_has_nrext64)
|
||||
return -EFSCORRUPTED;
|
||||
if (!xfs_has_large_extent_counts(sc->mp))
|
||||
return -EFSCORRUPTED;
|
||||
|
||||
max_extents = xfs_iext_max_nextents(true, whichfork);
|
||||
if (nextents > max_extents)
|
||||
return -EFSCORRUPTED;
|
||||
|
||||
sc->ip->i_diflags2 |= XFS_DIFLAG2_NREXT64;
|
||||
xfs_trans_log_inode(sc->tp, sc->ip, XFS_ILOG_CORE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize all the btree cursors for an AG repair except for the btree that
|
||||
* we're rebuilding.
|
||||
|
@ -30,11 +30,22 @@ static inline int xrep_notsupported(struct xfs_scrub *sc)
|
||||
int xrep_attempt(struct xfs_scrub *sc, struct xchk_stats_run *run);
|
||||
void xrep_failure(struct xfs_mount *mp);
|
||||
int xrep_roll_ag_trans(struct xfs_scrub *sc);
|
||||
int xrep_roll_trans(struct xfs_scrub *sc);
|
||||
int xrep_defer_finish(struct xfs_scrub *sc);
|
||||
bool xrep_ag_has_space(struct xfs_perag *pag, xfs_extlen_t nr_blocks,
|
||||
enum xfs_ag_resv_type type);
|
||||
xfs_extlen_t xrep_calc_ag_resblks(struct xfs_scrub *sc);
|
||||
|
||||
static inline int
|
||||
xrep_trans_commit(
|
||||
struct xfs_scrub *sc)
|
||||
{
|
||||
int error = xfs_trans_commit(sc->tp);
|
||||
|
||||
sc->tp = NULL;
|
||||
return error;
|
||||
}
|
||||
|
||||
struct xbitmap;
|
||||
struct xagb_bitmap;
|
||||
|
||||
@ -66,11 +77,16 @@ int xrep_ino_dqattach(struct xfs_scrub *sc);
|
||||
# define xrep_ino_dqattach(sc) (0)
|
||||
#endif /* CONFIG_XFS_QUOTA */
|
||||
|
||||
int xrep_ino_ensure_extent_count(struct xfs_scrub *sc, int whichfork,
|
||||
xfs_extnum_t nextents);
|
||||
int xrep_reset_perag_resv(struct xfs_scrub *sc);
|
||||
|
||||
/* Repair setup functions */
|
||||
int xrep_setup_ag_allocbt(struct xfs_scrub *sc);
|
||||
|
||||
struct xfs_imap;
|
||||
int xrep_setup_inode(struct xfs_scrub *sc, const struct xfs_imap *imap);
|
||||
|
||||
void xrep_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa);
|
||||
|
||||
/* Metadata revalidators */
|
||||
@ -88,6 +104,7 @@ int xrep_agi(struct xfs_scrub *sc);
|
||||
int xrep_allocbt(struct xfs_scrub *sc);
|
||||
int xrep_iallocbt(struct xfs_scrub *sc);
|
||||
int xrep_refcountbt(struct xfs_scrub *sc);
|
||||
int xrep_inode(struct xfs_scrub *sc);
|
||||
|
||||
int xrep_reinit_pagf(struct xfs_scrub *sc);
|
||||
int xrep_reinit_pagi(struct xfs_scrub *sc);
|
||||
@ -133,6 +150,8 @@ xrep_setup_nothing(
|
||||
}
|
||||
#define xrep_setup_ag_allocbt xrep_setup_nothing
|
||||
|
||||
#define xrep_setup_inode(sc, imap) ((void)0)
|
||||
|
||||
#define xrep_revalidate_allocbt (NULL)
|
||||
#define xrep_revalidate_iallocbt (NULL)
|
||||
|
||||
@ -144,6 +163,7 @@ xrep_setup_nothing(
|
||||
#define xrep_allocbt xrep_notsupported
|
||||
#define xrep_iallocbt xrep_notsupported
|
||||
#define xrep_refcountbt xrep_notsupported
|
||||
#define xrep_inode xrep_notsupported
|
||||
|
||||
#endif /* CONFIG_XFS_ONLINE_REPAIR */
|
||||
|
||||
|
@ -282,7 +282,7 @@ static const struct xchk_meta_ops meta_scrub_ops[] = {
|
||||
.type = ST_INODE,
|
||||
.setup = xchk_setup_inode,
|
||||
.scrub = xchk_inode,
|
||||
.repair = xrep_notsupported,
|
||||
.repair = xrep_inode,
|
||||
},
|
||||
[XFS_SCRUB_TYPE_BMBTD] = { /* inode data fork */
|
||||
.type = ST_INODE,
|
||||
|
@ -1393,6 +1393,135 @@ DEFINE_NEWBT_EXTENT_EVENT(xrep_newbt_alloc_file_blocks);
|
||||
DEFINE_NEWBT_EXTENT_EVENT(xrep_newbt_free_blocks);
|
||||
DEFINE_NEWBT_EXTENT_EVENT(xrep_newbt_claim_block);
|
||||
|
||||
DECLARE_EVENT_CLASS(xrep_dinode_class,
|
||||
TP_PROTO(struct xfs_scrub *sc, struct xfs_dinode *dip),
|
||||
TP_ARGS(sc, dip),
|
||||
TP_STRUCT__entry(
|
||||
__field(dev_t, dev)
|
||||
__field(xfs_ino_t, ino)
|
||||
__field(uint16_t, mode)
|
||||
__field(uint8_t, version)
|
||||
__field(uint8_t, format)
|
||||
__field(uint32_t, uid)
|
||||
__field(uint32_t, gid)
|
||||
__field(uint64_t, size)
|
||||
__field(uint64_t, nblocks)
|
||||
__field(uint32_t, extsize)
|
||||
__field(uint32_t, nextents)
|
||||
__field(uint16_t, anextents)
|
||||
__field(uint8_t, forkoff)
|
||||
__field(uint8_t, aformat)
|
||||
__field(uint16_t, flags)
|
||||
__field(uint32_t, gen)
|
||||
__field(uint64_t, flags2)
|
||||
__field(uint32_t, cowextsize)
|
||||
),
|
||||
TP_fast_assign(
|
||||
__entry->dev = sc->mp->m_super->s_dev;
|
||||
__entry->ino = sc->sm->sm_ino;
|
||||
__entry->mode = be16_to_cpu(dip->di_mode);
|
||||
__entry->version = dip->di_version;
|
||||
__entry->format = dip->di_format;
|
||||
__entry->uid = be32_to_cpu(dip->di_uid);
|
||||
__entry->gid = be32_to_cpu(dip->di_gid);
|
||||
__entry->size = be64_to_cpu(dip->di_size);
|
||||
__entry->nblocks = be64_to_cpu(dip->di_nblocks);
|
||||
__entry->extsize = be32_to_cpu(dip->di_extsize);
|
||||
__entry->nextents = be32_to_cpu(dip->di_nextents);
|
||||
__entry->anextents = be16_to_cpu(dip->di_anextents);
|
||||
__entry->forkoff = dip->di_forkoff;
|
||||
__entry->aformat = dip->di_aformat;
|
||||
__entry->flags = be16_to_cpu(dip->di_flags);
|
||||
__entry->gen = be32_to_cpu(dip->di_gen);
|
||||
__entry->flags2 = be64_to_cpu(dip->di_flags2);
|
||||
__entry->cowextsize = be32_to_cpu(dip->di_cowextsize);
|
||||
),
|
||||
TP_printk("dev %d:%d ino 0x%llx mode 0x%x version %u format %u uid %u gid %u disize 0x%llx nblocks 0x%llx extsize %u nextents %u anextents %u forkoff 0x%x aformat %u flags 0x%x gen 0x%x flags2 0x%llx cowextsize %u",
|
||||
MAJOR(__entry->dev), MINOR(__entry->dev),
|
||||
__entry->ino,
|
||||
__entry->mode,
|
||||
__entry->version,
|
||||
__entry->format,
|
||||
__entry->uid,
|
||||
__entry->gid,
|
||||
__entry->size,
|
||||
__entry->nblocks,
|
||||
__entry->extsize,
|
||||
__entry->nextents,
|
||||
__entry->anextents,
|
||||
__entry->forkoff,
|
||||
__entry->aformat,
|
||||
__entry->flags,
|
||||
__entry->gen,
|
||||
__entry->flags2,
|
||||
__entry->cowextsize)
|
||||
)
|
||||
|
||||
#define DEFINE_REPAIR_DINODE_EVENT(name) \
|
||||
DEFINE_EVENT(xrep_dinode_class, name, \
|
||||
TP_PROTO(struct xfs_scrub *sc, struct xfs_dinode *dip), \
|
||||
TP_ARGS(sc, dip))
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_header);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_mode);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_flags);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_size);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_extsize_hints);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_zap_symlink);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_zap_dir);
|
||||
DEFINE_REPAIR_DINODE_EVENT(xrep_dinode_fixed);
|
||||
|
||||
DECLARE_EVENT_CLASS(xrep_inode_class,
|
||||
TP_PROTO(struct xfs_scrub *sc),
|
||||
TP_ARGS(sc),
|
||||
TP_STRUCT__entry(
|
||||
__field(dev_t, dev)
|
||||
__field(xfs_ino_t, ino)
|
||||
__field(xfs_fsize_t, size)
|
||||
__field(xfs_rfsblock_t, nblocks)
|
||||
__field(uint16_t, flags)
|
||||
__field(uint64_t, flags2)
|
||||
__field(uint32_t, nextents)
|
||||
__field(uint8_t, format)
|
||||
__field(uint32_t, anextents)
|
||||
__field(uint8_t, aformat)
|
||||
),
|
||||
TP_fast_assign(
|
||||
__entry->dev = sc->mp->m_super->s_dev;
|
||||
__entry->ino = sc->sm->sm_ino;
|
||||
__entry->size = sc->ip->i_disk_size;
|
||||
__entry->nblocks = sc->ip->i_nblocks;
|
||||
__entry->flags = sc->ip->i_diflags;
|
||||
__entry->flags2 = sc->ip->i_diflags2;
|
||||
__entry->nextents = sc->ip->i_df.if_nextents;
|
||||
__entry->format = sc->ip->i_df.if_format;
|
||||
__entry->anextents = sc->ip->i_af.if_nextents;
|
||||
__entry->aformat = sc->ip->i_af.if_format;
|
||||
),
|
||||
TP_printk("dev %d:%d ino 0x%llx disize 0x%llx nblocks 0x%llx flags 0x%x flags2 0x%llx nextents %u format %u anextents %u aformat %u",
|
||||
MAJOR(__entry->dev), MINOR(__entry->dev),
|
||||
__entry->ino,
|
||||
__entry->size,
|
||||
__entry->nblocks,
|
||||
__entry->flags,
|
||||
__entry->flags2,
|
||||
__entry->nextents,
|
||||
__entry->format,
|
||||
__entry->anextents,
|
||||
__entry->aformat)
|
||||
)
|
||||
|
||||
#define DEFINE_REPAIR_INODE_EVENT(name) \
|
||||
DEFINE_EVENT(xrep_inode_class, name, \
|
||||
TP_PROTO(struct xfs_scrub *sc), \
|
||||
TP_ARGS(sc))
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_blockcounts);
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_ids);
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_flags);
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_blockdir_size);
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_sfdir_size);
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_dir_size);
|
||||
DEFINE_REPAIR_INODE_EVENT(xrep_inode_fixed);
|
||||
|
||||
#endif /* IS_ENABLED(CONFIG_XFS_ONLINE_REPAIR) */
|
||||
|
||||
#endif /* _TRACE_XFS_SCRUB_TRACE_H */
|
||||
|
Loading…
Reference in New Issue
Block a user