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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2021-2024 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_ISCAN_H__
#define __XFS_SCRUB_ISCAN_H__
struct xchk_iscan {
struct xfs_scrub *sc;
/* Lock to protect the scan cursor. */
struct mutex lock;
/*
* This is the first inode in the inumber address space that we
* examined. When the scan wraps around back to here, the scan is
* finished.
*/
xfs_ino_t scan_start_ino;
/* This is the inode that will be examined next. */
xfs_ino_t cursor_ino;
/* If nonzero and non-NULL, skip this inode when scanning. */
xfs_ino_t skip_ino;
/*
* This is the last inode that we've successfully scanned, either
* because the caller scanned it, or we moved the cursor past an empty
* part of the inode address space. Scan callers should only use the
* xchk_iscan_visit function to modify this.
*/
xfs_ino_t __visited_ino;
/* Operational state of the livescan. */
unsigned long __opstate;
/* Give up on iterating @cursor_ino if we can't iget it by this time. */
unsigned long __iget_deadline;
/* Amount of time (in ms) that we will try to iget an inode. */
unsigned int iget_timeout;
/* Wait this many ms to retry an iget. */
unsigned int iget_retry_delay;
/*
* The scan grabs batches of inodes and stashes them here before
* handing them out with _iter. Unallocated inodes are set in the
* mask so that all updates to that inode are selected for live
* update propagation.
*/
xfs_ino_t __batch_ino;
xfs_inofree_t __skipped_inomask;
struct xfs_inode *__inodes[XFS_INODES_PER_CHUNK];
};
/* Set if the scan has been aborted due to some event in the fs. */
#define XCHK_ISCAN_OPSTATE_ABORTED (1)
/* Use trylock to acquire the AGI */
#define XCHK_ISCAN_OPSTATE_TRYLOCK_AGI (2)
static inline bool
xchk_iscan_aborted(const struct xchk_iscan *iscan)
{
return test_bit(XCHK_ISCAN_OPSTATE_ABORTED, &iscan->__opstate);
}
static inline void
xchk_iscan_abort(struct xchk_iscan *iscan)
{
set_bit(XCHK_ISCAN_OPSTATE_ABORTED, &iscan->__opstate);
}
static inline bool
xchk_iscan_agi_needs_trylock(const struct xchk_iscan *iscan)
{
return test_bit(XCHK_ISCAN_OPSTATE_TRYLOCK_AGI, &iscan->__opstate);
}
static inline void
xchk_iscan_set_agi_trylock(struct xchk_iscan *iscan)
{
set_bit(XCHK_ISCAN_OPSTATE_TRYLOCK_AGI, &iscan->__opstate);
}
void xchk_iscan_start(struct xfs_scrub *sc, unsigned int iget_timeout,
unsigned int iget_retry_delay, struct xchk_iscan *iscan);
void xchk_iscan_finish_early(struct xchk_iscan *iscan);
void xchk_iscan_teardown(struct xchk_iscan *iscan);
int xchk_iscan_iter(struct xchk_iscan *iscan, struct xfs_inode **ipp);
void xchk_iscan_iter_finish(struct xchk_iscan *iscan);
void xchk_iscan_mark_visited(struct xchk_iscan *iscan, struct xfs_inode *ip);
bool xchk_iscan_want_live_update(struct xchk_iscan *iscan, xfs_ino_t ino);
#endif /* __XFS_SCRUB_ISCAN_H__ */
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