xfs: introduce xfs_bulkstat_ichunk_ra
From: Jie Liu <jeff.liu@oracle.com>
Introduce xfs_bulkstat_ichunk_ra() to loop over all clusters in the
next inode chunk, then performs readahead if there are any allocated
inodes in that cluster.
Refactor xfs_bulkstat() with it.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index dfc4aa5..b508167 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -172,6 +172,37 @@
xfs_bulkstat_one_fmt, ubused, stat);
}
+/*
+ * 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_bulkstat_ichunk_ra(
+ struct xfs_mount *mp,
+ xfs_agnumber_t agno,
+ struct xfs_inobt_rec_incore *irec)
+{
+ xfs_agblock_t agbno;
+ struct blk_plug plug;
+ int blks_per_cluster;
+ int inodes_per_cluster;
+ int i; /* inode chunk index */
+
+ agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
+ blks_per_cluster = xfs_icluster_size_fsb(mp);
+ inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
+
+ blk_start_plug(&plug);
+ for (i = 0; i < XFS_INODES_PER_CHUNK;
+ i += inodes_per_cluster, agbno += blks_per_cluster) {
+ if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
+ xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
+ &xfs_inode_buf_ops);
+ }
+ }
+ blk_finish_plug(&plug);
+}
+
#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
/*
@@ -187,7 +218,6 @@
char __user *ubuffer, /* buffer with inode stats */
int *done) /* 1 if there are more stats to get */
{
- xfs_agblock_t agbno=0;/* allocation group block number */
xfs_buf_t *agbp; /* agi header buffer */
xfs_agi_t *agi; /* agi header data */
xfs_agino_t agino; /* inode # in allocation group */
@@ -206,8 +236,6 @@
xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
xfs_ino_t lastino; /* last inode number returned */
- int blks_per_cluster; /* # of blocks per cluster */
- int inodes_per_cluster;/* # of inodes per cluster */
int nirbuf; /* size of irbuf */
int rval; /* return value error code */
int tmp; /* result value from btree calls */
@@ -237,8 +265,6 @@
*done = 0;
fmterror = 0;
ubufp = ubuffer;
- blks_per_cluster = xfs_icluster_size_fsb(mp);
- inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
if (!irbuf)
return -ENOMEM;
@@ -347,25 +373,7 @@
* Also start read-ahead now for this chunk.
*/
if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
- struct blk_plug plug;
- /*
- * Loop over all clusters in the next chunk.
- * Do a readahead if there are any allocated
- * inodes in that cluster.
- */
- blk_start_plug(&plug);
- agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
- for (chunkidx = 0;
- chunkidx < XFS_INODES_PER_CHUNK;
- chunkidx += inodes_per_cluster,
- agbno += blks_per_cluster) {
- if (xfs_inobt_maskn(chunkidx,
- inodes_per_cluster) & ~r.ir_free)
- xfs_btree_reada_bufs(mp, agno,
- agbno, blks_per_cluster,
- &xfs_inode_buf_ops);
- }
- blk_finish_plug(&plug);
+ xfs_bulkstat_ichunk_ra(mp, agno, &r);
irbp->ir_startino = r.ir_startino;
irbp->ir_freecount = r.ir_freecount;
irbp->ir_free = r.ir_free;