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xfs: move bulkstat ichunk helpers to iwalk code 

Now that we've reworked the bulkstat code to use iwalk, we can move the
old bulkstat ichunk helpers to xfs_iwalk.c.  No functional changes here.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2019-07-02 09:39:41 -07:00
parent 938c710d99
commit da1d9e5912
3 changed files with 93 additions and 104 deletions
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93
fs/xfs/xfs_itable.c
View File

@ -188,99 +188,6 @@ xfs_bulkstat_one(
return error;
}
/*
* Loop over all clusters in a chunk for a given incore inode allocation btree
* record. Do a readahead if there are any allocated inodes in that cluster.
*/
void
xfs_bulkstat_ichunk_ra(
struct xfs_mount *mp,
xfs_agnumber_t agno,
struct xfs_inobt_rec_incore *irec)
{
struct xfs_ino_geometry *igeo = M_IGEO(mp);
xfs_agblock_t agbno;
struct blk_plug plug;
int i; /* inode chunk index */
agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
blk_start_plug(&plug);
for (i = 0;
i < XFS_INODES_PER_CHUNK;
i += igeo->inodes_per_cluster,
agbno += igeo->blocks_per_cluster) {
if (xfs_inobt_maskn(i, igeo->inodes_per_cluster) &
~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno,
igeo->blocks_per_cluster,
&xfs_inode_buf_ops);
}
}
blk_finish_plug(&plug);
}
/*
* Lookup the inode chunk that the given inode lives in and then get the record
* if we found the chunk. If the inode was not the last in the chunk and there
* are some left allocated, update the data for the pointed-to record as well as
* return the count of grabbed inodes.
*/
int
xfs_bulkstat_grab_ichunk(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t agino, /* starting inode of chunk */
int *icount,/* return # of inodes grabbed */
struct xfs_inobt_rec_incore *irec) /* btree record */
{
int idx; /* index into inode chunk */
int stat;
int error = 0;
/* Lookup the inode chunk that this inode lives in */
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
if (error)
return error;
if (!stat) {
*icount = 0;
return error;
}
/* Get the record, should always work */
error = xfs_inobt_get_rec(cur, irec, &stat);
if (error)
return error;
XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
/* Check if the record contains the inode in request */
if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
*icount = 0;
return 0;
}
idx = agino - irec->ir_startino + 1;
if (idx < XFS_INODES_PER_CHUNK &&
(xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
int i;
/* We got a right chunk with some left inodes allocated at it.
* Grab the chunk record. Mark all the uninteresting inodes
* free -- because they're before our start point.
*/
for (i = 0; i < idx; i++) {
if (XFS_INOBT_MASK(i) & ~irec->ir_free)
irec->ir_freecount++;
}
irec->ir_free |= xfs_inobt_maskn(0, idx);
*icount = irec->ir_count - irec->ir_freecount;
}
return 0;
}
#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
static int
xfs_bulkstat_iwalk(
struct xfs_mount *mp,

8
fs/xfs/xfs_itable.h
View File

@ -64,12 +64,4 @@ xfs_inumbers(
void __user *buffer, /* buffer with inode info */
inumbers_fmt_pf formatter);
/* Temporarily needed while we refactor functions. */
struct xfs_btree_cur;
struct xfs_inobt_rec_incore;
void xfs_bulkstat_ichunk_ra(struct xfs_mount *mp, xfs_agnumber_t agno,
struct xfs_inobt_rec_incore *irec);
int xfs_bulkstat_grab_ichunk(struct xfs_btree_cur *cur, xfs_agino_t agino,
int *icount, struct xfs_inobt_rec_incore *irec);
#endif /* __XFS_ITABLE_H__ */

96
fs/xfs/xfs_iwalk.c
View File

@ -15,7 +15,6 @@
#include "xfs_ialloc.h"
#include "xfs_ialloc_btree.h"
#include "xfs_iwalk.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_trace.h"
#include "xfs_icache.h"
@ -66,6 +65,97 @@ struct xfs_iwalk_ag {
void *data;
};
/*
* Loop over all clusters in a chunk for a given incore inode allocation btree
* record. Do a readahead if there are any allocated inodes in that cluster.
*/
STATIC void
xfs_iwalk_ichunk_ra(
struct xfs_mount *mp,
xfs_agnumber_t agno,
struct xfs_inobt_rec_incore *irec)
{
struct xfs_ino_geometry *igeo = M_IGEO(mp);
xfs_agblock_t agbno;
struct blk_plug plug;
int i; /* inode chunk index */
agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
blk_start_plug(&plug);
for (i = 0;
i < XFS_INODES_PER_CHUNK;
i += igeo->inodes_per_cluster,
agbno += igeo->blocks_per_cluster) {
if (xfs_inobt_maskn(i, igeo->inodes_per_cluster) &
~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno,
igeo->blocks_per_cluster,
&xfs_inode_buf_ops);
}
}
blk_finish_plug(&plug);
}
/*
* Lookup the inode chunk that the given inode lives in and then get the record
* if we found the chunk. If the inode was not the last in the chunk and there
* are some left allocated, update the data for the pointed-to record as well as
* return the count of grabbed inodes.
*/
STATIC int
xfs_iwalk_grab_ichunk(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t agino, /* starting inode of chunk */
int *icount,/* return # of inodes grabbed */
struct xfs_inobt_rec_incore *irec) /* btree record */
{
int idx; /* index into inode chunk */
int stat;
int error = 0;
/* Lookup the inode chunk that this inode lives in */
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
if (error)
return error;
if (!stat) {
*icount = 0;
return error;
}
/* Get the record, should always work */
error = xfs_inobt_get_rec(cur, irec, &stat);
if (error)
return error;
XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
/* Check if the record contains the inode in request */
if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
*icount = 0;
return 0;
}
idx = agino - irec->ir_startino + 1;
if (idx < XFS_INODES_PER_CHUNK &&
(xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
int i;
/* We got a right chunk with some left inodes allocated at it.
* Grab the chunk record. Mark all the uninteresting inodes
* free -- because they're before our start point.
*/
for (i = 0; i < idx; i++) {
if (XFS_INOBT_MASK(i) & ~irec->ir_free)
irec->ir_freecount++;
}
irec->ir_free |= xfs_inobt_maskn(0, idx);
*icount = irec->ir_count - irec->ir_freecount;
}
return 0;
}
/* Allocate memory for a walk. */
STATIC int
xfs_iwalk_alloc(
@ -191,7 +281,7 @@ xfs_iwalk_ag_start(
* We require a lookup cache of at least two elements so that we don't
* have to deal with tearing down the cursor to walk the records.
*/
error = xfs_bulkstat_grab_ichunk(*curpp, agino - 1, &icount,
error = xfs_iwalk_grab_ichunk(*curpp, agino - 1, &icount,
&iwag->recs[iwag->nr_recs]);
if (error)
return error;
@ -298,7 +388,7 @@ xfs_iwalk_ag(
* Start readahead for this inode chunk in anticipation of
* walking the inodes.
*/
xfs_bulkstat_ichunk_ra(mp, agno, irec);
xfs_iwalk_ichunk_ra(mp, agno, irec);
/*
* If there's space in the buffer for more records, increment