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xfs: convert xfs_iwalk to use perag references 

Rather than manually walking the ags and passing agnunbers around,
pass the perag for the AG we are currently working on around in the
iwalk structure.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Dave Chinner 2021-06-02 10:48:24 +10:00 committed by Dave Chinner
parent 934933c3ee
commit 6f4118fc64
2 changed files with 64 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
fs/xfs/libxfs/xfs_ag.h
View File

@ -117,19 +117,23 @@ void xfs_perag_put(struct xfs_perag *pag);
/*
* Perag iteration APIs
*/
#define for_each_perag(mp, next_agno, pag) \
for ((next_agno) = 0, (pag) = xfs_perag_get((mp), 0); \
#define for_each_perag_from(mp, next_agno, pag) \
for ((pag) = xfs_perag_get((mp), (next_agno)); \
(pag) != NULL; \
(next_agno) = (pag)->pag_agno + 1, \
xfs_perag_put(pag), \
(pag) = xfs_perag_get((mp), (next_agno)))
#define for_each_perag_tag(mp, next_agno, pag, tag) \
for ((next_agno) = 0, (pag) = xfs_perag_get_tag((mp), 0, (tag)); \
#define for_each_perag(mp, agno, pag) \
(agno) = 0; \
for_each_perag_from((mp), (agno), (pag))
#define for_each_perag_tag(mp, agno, pag, tag) \
for ((agno) = 0, (pag) = xfs_perag_get_tag((mp), 0, (tag)); \
(pag) != NULL; \
(next_agno) = (pag)->pag_agno + 1, \
(agno) = (pag)->pag_agno + 1, \
xfs_perag_put(pag), \
(pag) = xfs_perag_get_tag((mp), (next_agno), (tag)))
(pag) = xfs_perag_get_tag((mp), (agno), (tag)))
struct aghdr_init_data {
/* per ag data */

86
fs/xfs/xfs_iwalk.c
View File

@ -21,6 +21,7 @@
#include "xfs_health.h"
#include "xfs_trans.h"
#include "xfs_pwork.h"
#include "xfs_ag.h"
/*
* Walking Inodes in the Filesystem
@ -51,6 +52,7 @@ struct xfs_iwalk_ag {
struct xfs_mount *mp;
struct xfs_trans *tp;
struct xfs_perag *pag;
/* Where do we start the traversal? */
xfs_ino_t startino;
@ -90,7 +92,7 @@ struct xfs_iwalk_ag {
STATIC void
xfs_iwalk_ichunk_ra(
struct xfs_mount *mp,
xfs_agnumber_t agno,
struct xfs_perag *pag,
struct xfs_inobt_rec_incore *irec)
{
struct xfs_ino_geometry *igeo = M_IGEO(mp);
@ -106,7 +108,7 @@ xfs_iwalk_ichunk_ra(
imask = xfs_inobt_maskn(i, igeo->inodes_per_cluster);
if (imask & ~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno,
xfs_btree_reada_bufs(mp, pag->pag_agno, agbno,
igeo->blocks_per_cluster,
&xfs_inode_buf_ops);
}
@ -174,26 +176,25 @@ xfs_iwalk_free(
/* For each inuse inode in each cached inobt record, call our function. */
STATIC int
xfs_iwalk_ag_recs(
struct xfs_iwalk_ag *iwag)
struct xfs_iwalk_ag *iwag)
{
struct xfs_mount *mp = iwag->mp;
struct xfs_trans *tp = iwag->tp;
xfs_ino_t ino;
unsigned int i, j;
xfs_agnumber_t agno;
int error;
struct xfs_mount *mp = iwag->mp;
struct xfs_trans *tp = iwag->tp;
struct xfs_perag *pag = iwag->pag;
xfs_ino_t ino;
unsigned int i, j;
int error;
agno = XFS_INO_TO_AGNO(mp, iwag->startino);
for (i = 0; i < iwag->nr_recs; i++) {
struct xfs_inobt_rec_incore *irec = &iwag->recs[i];
trace_xfs_iwalk_ag_rec(mp, agno, irec);
trace_xfs_iwalk_ag_rec(mp, pag->pag_agno, irec);
if (xfs_pwork_want_abort(&iwag->pwork))
return 0;
if (iwag->inobt_walk_fn) {
error = iwag->inobt_walk_fn(mp, tp, agno, irec,
error = iwag->inobt_walk_fn(mp, tp, pag->pag_agno, irec,
iwag->data);
if (error)
return error;
@ -211,7 +212,8 @@ xfs_iwalk_ag_recs(
continue;
/* Otherwise call our function. */
ino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino + j);
ino = XFS_AGINO_TO_INO(mp, pag->pag_agno,
irec->ir_startino + j);
error = iwag->iwalk_fn(mp, tp, ino, iwag->data);
if (error)
return error;
@ -257,7 +259,6 @@ xfs_iwalk_del_inobt(
STATIC int
xfs_iwalk_ag_start(
struct xfs_iwalk_ag *iwag,
xfs_agnumber_t agno,
xfs_agino_t agino,
struct xfs_btree_cur **curpp,
struct xfs_buf **agi_bpp,
@ -265,12 +266,14 @@ xfs_iwalk_ag_start(
{
struct xfs_mount *mp = iwag->mp;
struct xfs_trans *tp = iwag->tp;
struct xfs_perag *pag = iwag->pag;
struct xfs_inobt_rec_incore *irec;
int error;
/* Set up a fresh cursor and empty the inobt cache. */
iwag->nr_recs = 0;
error = xfs_inobt_cur(mp, tp, agno, XFS_BTNUM_INO, curpp, agi_bpp);
error = xfs_inobt_cur(mp, tp, pag->pag_agno, XFS_BTNUM_INO,
curpp, agi_bpp);
if (error)
return error;
@ -304,7 +307,7 @@ xfs_iwalk_ag_start(
if (XFS_IS_CORRUPT(mp, *has_more != 1))
return -EFSCORRUPTED;
iwag->lastino = XFS_AGINO_TO_INO(mp, agno,
iwag->lastino = XFS_AGINO_TO_INO(mp, pag->pag_agno,
irec->ir_startino + XFS_INODES_PER_CHUNK - 1);
/*
@ -345,7 +348,6 @@ out_advance:
STATIC int
xfs_iwalk_run_callbacks(
struct xfs_iwalk_ag *iwag,
xfs_agnumber_t agno,
struct xfs_btree_cur **curpp,
struct xfs_buf **agi_bpp,
int *has_more)
@ -376,7 +378,8 @@ xfs_iwalk_run_callbacks(
return 0;
/* ...and recreate the cursor just past where we left off. */
error = xfs_inobt_cur(mp, tp, agno, XFS_BTNUM_INO, curpp, agi_bpp);
error = xfs_inobt_cur(mp, tp, iwag->pag->pag_agno, XFS_BTNUM_INO,
curpp, agi_bpp);
if (error)
return error;
@ -390,17 +393,17 @@ xfs_iwalk_ag(
{
struct xfs_mount *mp = iwag->mp;
struct xfs_trans *tp = iwag->tp;
struct xfs_perag *pag = iwag->pag;
struct xfs_buf *agi_bp = NULL;
struct xfs_btree_cur *cur = NULL;
xfs_agnumber_t agno;
xfs_agino_t agino;
int has_more;
int error = 0;
/* Set up our cursor at the right place in the inode btree. */
agno = XFS_INO_TO_AGNO(mp, iwag->startino);
ASSERT(pag->pag_agno == XFS_INO_TO_AGNO(mp, iwag->startino));
agino = XFS_INO_TO_AGINO(mp, iwag->startino);
error = xfs_iwalk_ag_start(iwag, agno, agino, &cur, &agi_bp, &has_more);
error = xfs_iwalk_ag_start(iwag, agino, &cur, &agi_bp, &has_more);
while (!error && has_more) {
struct xfs_inobt_rec_incore *irec;
@ -417,7 +420,7 @@ xfs_iwalk_ag(
break;
/* Make sure that we always move forward. */
rec_fsino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino);
rec_fsino = XFS_AGINO_TO_INO(mp, pag->pag_agno, irec->ir_startino);
if (iwag->lastino != NULLFSINO &&
XFS_IS_CORRUPT(mp, iwag->lastino >= rec_fsino)) {
error = -EFSCORRUPTED;
@ -438,7 +441,7 @@ xfs_iwalk_ag(
* walking the inodes.
*/
if (iwag->iwalk_fn)
xfs_iwalk_ichunk_ra(mp, agno, irec);
xfs_iwalk_ichunk_ra(mp, pag, irec);
/*
* If there's space in the buffer for more records, increment
@ -458,15 +461,14 @@ xfs_iwalk_ag(
* we would be if we had been able to increment like above.
*/
ASSERT(has_more);
error = xfs_iwalk_run_callbacks(iwag, agno, &cur, &agi_bp,
&has_more);
error = xfs_iwalk_run_callbacks(iwag, &cur, &agi_bp, &has_more);
}
if (iwag->nr_recs == 0 || error)
goto out;
/* Walk the unprocessed records in the cache. */
error = xfs_iwalk_run_callbacks(iwag, agno, &cur, &agi_bp, &has_more);
error = xfs_iwalk_run_callbacks(iwag, &cur, &agi_bp, &has_more);
out:
xfs_iwalk_del_inobt(tp, &cur, &agi_bp, error);
@ -555,6 +557,7 @@ xfs_iwalk(
.pwork = XFS_PWORK_SINGLE_THREADED,
.lastino = NULLFSINO,
};
struct xfs_perag *pag;
xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
int error;
@ -565,15 +568,19 @@ xfs_iwalk(
if (error)
return error;
for (; agno < mp->m_sb.sb_agcount; agno++) {
for_each_perag_from(mp, agno, pag) {
iwag.pag = pag;
error = xfs_iwalk_ag(&iwag);
if (error)
break;
iwag.startino = XFS_AGINO_TO_INO(mp, agno + 1, 0);
if (flags & XFS_INOBT_WALK_SAME_AG)
break;
iwag.pag = NULL;
}
if (iwag.pag)
xfs_perag_put(pag);
xfs_iwalk_free(&iwag);
return error;
}
@ -598,6 +605,7 @@ xfs_iwalk_ag_work(
error = xfs_iwalk_ag(iwag);
xfs_iwalk_free(iwag);
out:
xfs_perag_put(iwag->pag);
kmem_free(iwag);
return error;
}
@ -617,6 +625,7 @@ xfs_iwalk_threaded(
void *data)
{
struct xfs_pwork_ctl pctl;
struct xfs_perag *pag;
xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
int error;
@ -627,7 +636,7 @@ xfs_iwalk_threaded(
if (error)
return error;
for (; agno < mp->m_sb.sb_agcount; agno++) {
for_each_perag_from(mp, agno, pag) {
struct xfs_iwalk_ag *iwag;
if (xfs_pwork_ctl_want_abort(&pctl))
@ -635,17 +644,25 @@ xfs_iwalk_threaded(
iwag = kmem_zalloc(sizeof(struct xfs_iwalk_ag), 0);
iwag->mp = mp;
/*
* perag is being handed off to async work, so take another
* reference for the async work to release.
*/
atomic_inc(&pag->pag_ref);
iwag->pag = pag;
iwag->iwalk_fn = iwalk_fn;
iwag->data = data;
iwag->startino = startino;
iwag->sz_recs = xfs_iwalk_prefetch(inode_records);
iwag->lastino = NULLFSINO;
xfs_pwork_queue(&pctl, &iwag->pwork);
startino = XFS_AGINO_TO_INO(mp, agno + 1, 0);
startino = XFS_AGINO_TO_INO(mp, pag->pag_agno + 1, 0);
if (flags & XFS_INOBT_WALK_SAME_AG)
break;
}
if (pag)
xfs_perag_put(pag);
if (polled)
xfs_pwork_poll(&pctl);
return xfs_pwork_destroy(&pctl);
@ -715,6 +732,7 @@ xfs_inobt_walk(
.pwork = XFS_PWORK_SINGLE_THREADED,
.lastino = NULLFSINO,
};
struct xfs_perag *pag;
xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
int error;
@ -725,15 +743,19 @@ xfs_inobt_walk(
if (error)
return error;
for (; agno < mp->m_sb.sb_agcount; agno++) {
for_each_perag_from(mp, agno, pag) {
iwag.pag = pag;
error = xfs_iwalk_ag(&iwag);
if (error)
break;
iwag.startino = XFS_AGINO_TO_INO(mp, agno + 1, 0);
iwag.startino = XFS_AGINO_TO_INO(mp, pag->pag_agno + 1, 0);
if (flags & XFS_INOBT_WALK_SAME_AG)
break;
iwag.pag = NULL;
}
if (iwag.pag)
xfs_perag_put(pag);
xfs_iwalk_free(&iwag);
return error;
}