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xfs: move xfs_inode_ag_iterator to be closer to the perag walking code 

Move the xfs_inode_ag_iterator function to be nearer xfs_inode_ag_walk
so that we don't have to scroll back and forth to figure out how the
incore inode walking function works.  No functional changes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2020-05-21 13:08:50 -07:00
parent 7e88d31423
commit 5662d38ccd
1 changed files with 48 additions and 40 deletions
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88
fs/xfs/xfs_icache.c
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@ -811,6 +811,10 @@ out_unlock_noent:
return false;
}
/*
* For a given per-AG structure @pag, grab, @execute, and rele all incore
* inodes with the given radix tree @tag.
*/
STATIC int
xfs_inode_ag_walk(
struct xfs_mount *mp,
@ -916,6 +920,50 @@ restart:
return last_error;
}
/* Fetch the next (possibly tagged) per-AG structure. */
static inline struct xfs_perag *
xfs_inode_walk_get_perag(
struct xfs_mount *mp,
xfs_agnumber_t agno,
int tag)
{
if (tag == XFS_ICI_NO_TAG)
return xfs_perag_get(mp, agno);
return xfs_perag_get_tag(mp, agno, tag);
}
/*
* Call the @execute function on all incore inodes matching the radix tree
* @tag.
*/
int
xfs_inode_ag_iterator(
struct xfs_mount *mp,
int iter_flags,
int (*execute)(struct xfs_inode *ip, void *args),
void *args,
int tag)
{
struct xfs_perag *pag;
int error = 0;
int last_error = 0;
xfs_agnumber_t ag;
ag = 0;
while ((pag = xfs_inode_walk_get_perag(mp, ag, tag))) {
ag = pag->pag_agno + 1;
error = xfs_inode_ag_walk(mp, pag, execute, args, tag,
iter_flags);
xfs_perag_put(pag);
if (error) {
last_error = error;
if (error == -EFSCORRUPTED)
break;
}
}
return last_error;
}
/*
* Background scanning to trim post-EOF preallocated space. This is queued
* based on the 'speculative_prealloc_lifetime' tunable (5m by default).
@ -979,46 +1027,6 @@ xfs_cowblocks_worker(
xfs_queue_cowblocks(mp);
}
/* Fetch the next (possibly tagged) per-AG structure. */
static inline struct xfs_perag *
xfs_inode_walk_get_perag(
struct xfs_mount *mp,
xfs_agnumber_t agno,
int tag)
{
if (tag == XFS_ICI_NO_TAG)
return xfs_perag_get(mp, agno);
return xfs_perag_get_tag(mp, agno, tag);
}
int
xfs_inode_ag_iterator(
struct xfs_mount *mp,
int iter_flags,
int (*execute)(struct xfs_inode *ip, void *args),
void *args,
int tag)
{
struct xfs_perag *pag;
int error = 0;
int last_error = 0;
xfs_agnumber_t ag;
ag = 0;
while ((pag = xfs_inode_walk_get_perag(mp, ag, tag))) {
ag = pag->pag_agno + 1;
error = xfs_inode_ag_walk(mp, pag, execute, args, tag,
iter_flags);
xfs_perag_put(pag);
if (error) {
last_error = error;
if (error == -EFSCORRUPTED)
break;
}
}
return last_error;
}
/*
* Grab the inode for reclaim exclusively.
* Return 0 if we grabbed it, non-zero otherwise.