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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2017-2023 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_COMMON_H__
#define __XFS_SCRUB_COMMON_H__
/*
* We /could/ terminate a scrub/repair operation early. If we're not
* in a good place to continue (fatal signal, etc.) then bail out.
* Note that we're careful not to make any judgements about *error.
*/
static inline bool
xchk_should_terminate(
struct xfs_scrub *sc,
int *error)
{
/*
* If preemption is disabled, we need to yield to the scheduler every
* few seconds so that we don't run afoul of the soft lockup watchdog
* or RCU stall detector.
*/
cond_resched();
if (fatal_signal_pending(current)) {
if (*error == 0)
*error = -EINTR;
return true;
}
return false;
}
int xchk_trans_alloc(struct xfs_scrub *sc, uint resblks);
void xchk_trans_cancel(struct xfs_scrub *sc);
bool xchk_process_error(struct xfs_scrub *sc, xfs_agnumber_t agno,
xfs_agblock_t bno, int *error);
bool xchk_fblock_process_error(struct xfs_scrub *sc, int whichfork,
xfs_fileoff_t offset, int *error);
bool xchk_xref_process_error(struct xfs_scrub *sc,
xfs_agnumber_t agno, xfs_agblock_t bno, int *error);
bool xchk_fblock_xref_process_error(struct xfs_scrub *sc,
int whichfork, xfs_fileoff_t offset, int *error);
void xchk_block_set_preen(struct xfs_scrub *sc,
struct xfs_buf *bp);
void xchk_ino_set_preen(struct xfs_scrub *sc, xfs_ino_t ino);
void xchk_set_corrupt(struct xfs_scrub *sc);
void xchk_block_set_corrupt(struct xfs_scrub *sc,
struct xfs_buf *bp);
void xchk_ino_set_corrupt(struct xfs_scrub *sc, xfs_ino_t ino);
void xchk_fblock_set_corrupt(struct xfs_scrub *sc, int whichfork,
xfs_fileoff_t offset);
void xchk_block_xref_set_corrupt(struct xfs_scrub *sc,
struct xfs_buf *bp);
void xchk_ino_xref_set_corrupt(struct xfs_scrub *sc,
xfs_ino_t ino);
void xchk_fblock_xref_set_corrupt(struct xfs_scrub *sc,
int whichfork, xfs_fileoff_t offset);
void xchk_ino_set_warning(struct xfs_scrub *sc, xfs_ino_t ino);
void xchk_fblock_set_warning(struct xfs_scrub *sc, int whichfork,
xfs_fileoff_t offset);
void xchk_set_incomplete(struct xfs_scrub *sc);
int xchk_checkpoint_log(struct xfs_mount *mp);
/* Are we set up for a cross-referencing check? */
bool xchk_should_check_xref(struct xfs_scrub *sc, int *error,
struct xfs_btree_cur **curpp);
/* Setup functions */
int xchk_setup_agheader(struct xfs_scrub *sc);
int xchk_setup_fs(struct xfs_scrub *sc);
int xchk_setup_ag_allocbt(struct xfs_scrub *sc);
int xchk_setup_ag_iallocbt(struct xfs_scrub *sc);
int xchk_setup_ag_rmapbt(struct xfs_scrub *sc);
int xchk_setup_ag_refcountbt(struct xfs_scrub *sc);
int xchk_setup_inode(struct xfs_scrub *sc);
int xchk_setup_inode_bmap(struct xfs_scrub *sc);
int xchk_setup_inode_bmap_data(struct xfs_scrub *sc);
int xchk_setup_directory(struct xfs_scrub *sc);
int xchk_setup_xattr(struct xfs_scrub *sc);
int xchk_setup_symlink(struct xfs_scrub *sc);
int xchk_setup_parent(struct xfs_scrub *sc);
#ifdef CONFIG_XFS_RT
int xchk_setup_rtbitmap(struct xfs_scrub *sc);
int xchk_setup_rtsummary(struct xfs_scrub *sc);
#else
static inline int
xchk_setup_rtbitmap(struct xfs_scrub *sc)
{
return -ENOENT;
}
static inline int
xchk_setup_rtsummary(struct xfs_scrub *sc)
{
return -ENOENT;
}
#endif
#ifdef CONFIG_XFS_QUOTA
int xchk_ino_dqattach(struct xfs_scrub *sc);
int xchk_setup_quota(struct xfs_scrub *sc);
#else
static inline int
xchk_ino_dqattach(struct xfs_scrub *sc)
{
return 0;
}
static inline int
xchk_setup_quota(struct xfs_scrub *sc)
{
return -ENOENT;
}
#endif
int xchk_setup_fscounters(struct xfs_scrub *sc);
void xchk_ag_free(struct xfs_scrub *sc, struct xchk_ag *sa);
int xchk_ag_init(struct xfs_scrub *sc, xfs_agnumber_t agno,
struct xchk_ag *sa);
/*
* Grab all AG resources, treating the inability to grab the perag structure as
* a fs corruption. This is intended for callers checking an ondisk reference
* to a given AG, which means that the AG must still exist.
*/
static inline int
xchk_ag_init_existing(
struct xfs_scrub *sc,
xfs_agnumber_t agno,
struct xchk_ag *sa)
{
int error = xchk_ag_init(sc, agno, sa);
return error == -ENOENT ? -EFSCORRUPTED : error;
}
int xchk_ag_read_headers(struct xfs_scrub *sc, xfs_agnumber_t agno,
struct xchk_ag *sa);
void xchk_ag_btcur_free(struct xchk_ag *sa);
void xchk_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa);
int xchk_count_rmap_ownedby_ag(struct xfs_scrub *sc, struct xfs_btree_cur *cur,
const struct xfs_owner_info *oinfo, xfs_filblks_t *blocks);
int xchk_setup_ag_btree(struct xfs_scrub *sc, bool force_log);
int xchk_iget_for_scrubbing(struct xfs_scrub *sc);
int xchk_setup_inode_contents(struct xfs_scrub *sc, unsigned int resblks);
int xchk_install_live_inode(struct xfs_scrub *sc, struct xfs_inode *ip);
void xchk_ilock(struct xfs_scrub *sc, unsigned int ilock_flags);
bool xchk_ilock_nowait(struct xfs_scrub *sc, unsigned int ilock_flags);
void xchk_iunlock(struct xfs_scrub *sc, unsigned int ilock_flags);
void xchk_buffer_recheck(struct xfs_scrub *sc, struct xfs_buf *bp);
/*
* Grab the inode at @inum. The caller must have created a scrub transaction
* so that we can confirm the inumber by walking the inobt and not deadlock on
* a loop in the inobt.
*/
int xchk_iget(struct xfs_scrub *sc, xfs_ino_t inum, struct xfs_inode **ipp);
int xchk_iget_agi(struct xfs_scrub *sc, xfs_ino_t inum,
struct xfs_buf **agi_bpp, struct xfs_inode **ipp);
void xchk_irele(struct xfs_scrub *sc, struct xfs_inode *ip);
int xchk_install_handle_inode(struct xfs_scrub *sc, struct xfs_inode *ip);
/*
* Safe version of (untrusted) xchk_iget that uses an empty transaction to
* avoid deadlocking on loops in the inobt. This should only be used in a
* scrub or repair setup routine, and only prior to grabbing a transaction.
*/
static inline int
xchk_iget_safe(struct xfs_scrub *sc, xfs_ino_t inum, struct xfs_inode **ipp)
{
int error;
ASSERT(sc->tp == NULL);
error = xchk_trans_alloc(sc, 0);
if (error)
return error;
error = xchk_iget(sc, inum, ipp);
xchk_trans_cancel(sc);
return error;
}
/*
* Don't bother cross-referencing if we already found corruption or cross
* referencing discrepancies.
*/
static inline bool xchk_skip_xref(struct xfs_scrub_metadata *sm)
{
return sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
XFS_SCRUB_OFLAG_XCORRUPT);
}
bool xchk_dir_looks_zapped(struct xfs_inode *dp);
#ifdef CONFIG_XFS_ONLINE_REPAIR
/* Decide if a repair is required. */
static inline bool xchk_needs_repair(const struct xfs_scrub_metadata *sm)
{
return sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
XFS_SCRUB_OFLAG_XCORRUPT |
XFS_SCRUB_OFLAG_PREEN);
}
/*
* "Should we prepare for a repair?"
*
* Return true if the caller permits us to repair metadata and we're not
* setting up for a post-repair evaluation.
*/
static inline bool xchk_could_repair(const struct xfs_scrub *sc)
{
return (sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR) &&
!(sc->flags & XREP_ALREADY_FIXED);
}
#else
# define xchk_needs_repair(sc) (false)
# define xchk_could_repair(sc) (false)
#endif /* CONFIG_XFS_ONLINE_REPAIR */
int xchk_metadata_inode_forks(struct xfs_scrub *sc);
/*
* Helper macros to allocate and format xfile description strings.
* Callers must kfree the pointer returned.
*/
#define xchk_xfile_descr(sc, fmt, ...) \
kasprintf(XCHK_GFP_FLAGS, "XFS (%s): " fmt, \
(sc)->mp->m_super->s_id, ##__VA_ARGS__)
#define xchk_xfile_ag_descr(sc, fmt, ...) \
kasprintf(XCHK_GFP_FLAGS, "XFS (%s): AG 0x%x " fmt, \
(sc)->mp->m_super->s_id, \
(sc)->sa.pag ? (sc)->sa.pag->pag_agno : (sc)->sm->sm_agno, \
##__VA_ARGS__)
#define xchk_xfile_ino_descr(sc, fmt, ...) \
kasprintf(XCHK_GFP_FLAGS, "XFS (%s): inode 0x%llx " fmt, \
(sc)->mp->m_super->s_id, \
(sc)->ip ? (sc)->ip->i_ino : (sc)->sm->sm_ino, \
##__VA_ARGS__)
/*
* Setting up a hook to wait for intents to drain is costly -- we have to take
* the CPU hotplug lock and force an i-cache flush on all CPUs once to set it
* up, and again to tear it down. These costs add up quickly, so we only want
* to enable the drain waiter if the drain actually detected a conflict with
* running intent chains.
*/
static inline bool xchk_need_intent_drain(struct xfs_scrub *sc)
{
return sc->flags & XCHK_NEED_DRAIN;
}
void xchk_fsgates_enable(struct xfs_scrub *sc, unsigned int scrub_fshooks);
int xchk_inode_is_allocated(struct xfs_scrub *sc, xfs_agino_t agino,
bool *inuse);
#endif /* __XFS_SCRUB_COMMON_H__ */
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