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xfs: merge the perag freeing helpers

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There is no good reason to have two different routines for freeing perag
structures for the unmount and error cases.  Add two arguments to specify
the range of AGs to free to xfs_free_perag, and use that to replace
xfs_free_unused_perag_range.

The addition RCU grace period for the error case is harmless, and the
extra check for the AG to actually exist is not required now that the
callers pass the exact known allocated range.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-10-14 08:04:51 +02:00 committed by Carlos Maiolino
parent 82742f8c3f
commit aa67ec6a25
4 changed files with 15 additions and 37 deletions
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40
fs/xfs/libxfs/xfs_ag.c
View File

@ -185,17 +185,20 @@ out:
}
/*
* Free up the per-ag resources associated with the mount structure.
* Free up the per-ag resources within the specified AG range.
*/
void
xfs_free_perag(
struct xfs_mount *mp)
xfs_free_perag_range(
struct xfs_mount *mp,
xfs_agnumber_t first_agno,
xfs_agnumber_t end_agno)
{
struct xfs_perag *pag;
xfs_agnumber_t agno;
for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
pag = xa_erase(&mp->m_perags, agno);
for (agno = first_agno; agno < end_agno; agno++) {
struct xfs_perag *pag = xa_erase(&mp->m_perags, agno);
ASSERT(pag);
XFS_IS_CORRUPT(pag->pag_mount, atomic_read(&pag->pag_ref) != 0);
xfs_defer_drain_free(&pag->pag_intents_drain);
@ -270,29 +273,6 @@ xfs_agino_range(
return __xfs_agino_range(mp, xfs_ag_block_count(mp, agno), first, last);
}
/*
* Free perag within the specified AG range, it is only used to free unused
* perags under the error handling path.
*/
void
xfs_free_unused_perag_range(
struct xfs_mount *mp,
xfs_agnumber_t agstart,
xfs_agnumber_t agend)
{
struct xfs_perag *pag;
xfs_agnumber_t index;
for (index = agstart; index < agend; index++) {
pag = xa_erase(&mp->m_perags, index);
if (!pag)
break;
xfs_buf_cache_destroy(&pag->pag_bcache);
xfs_defer_drain_free(&pag->pag_intents_drain);
kfree(pag);
}
}
int
xfs_initialize_perag(
struct xfs_mount *mp,
@ -366,7 +346,7 @@ out_remove_pag:
out_free_pag:
kfree(pag);
out_unwind_new_pags:
xfs_free_unused_perag_range(mp, old_agcount, index);
xfs_free_perag_range(mp, old_agcount, index);
return error;
}

5
fs/xfs/libxfs/xfs_ag.h
View File

@ -144,13 +144,12 @@ __XFS_AG_OPSTATE(prefers_metadata, PREFERS_METADATA)
__XFS_AG_OPSTATE(allows_inodes, ALLOWS_INODES)
__XFS_AG_OPSTATE(agfl_needs_reset, AGFL_NEEDS_RESET)
void xfs_free_unused_perag_range(struct xfs_mount *mp, xfs_agnumber_t agstart,
xfs_agnumber_t agend);
int xfs_initialize_perag(struct xfs_mount *mp, xfs_agnumber_t old_agcount,
xfs_agnumber_t agcount, xfs_rfsblock_t dcount,
xfs_agnumber_t *maxagi);
void xfs_free_perag_range(struct xfs_mount *mp, xfs_agnumber_t first_agno,
xfs_agnumber_t end_agno);
int xfs_initialize_perag_data(struct xfs_mount *mp, xfs_agnumber_t agno);
void xfs_free_perag(struct xfs_mount *mp);
/* Passive AG references */
struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);

2
fs/xfs/xfs_fsops.c
View File

@ -229,7 +229,7 @@ out_trans_cancel:
xfs_trans_cancel(tp);
out_free_unused_perag:
if (nagcount > oagcount)
xfs_free_unused_perag_range(mp, oagcount, nagcount);
xfs_free_perag_range(mp, oagcount, nagcount);
return error;
}

5
fs/xfs/xfs_mount.c
View File

@ -1048,7 +1048,7 @@ xfs_mountfs(
xfs_buftarg_drain(mp->m_logdev_targp);
xfs_buftarg_drain(mp->m_ddev_targp);
out_free_perag:
xfs_free_perag(mp);
xfs_free_perag_range(mp, 0, mp->m_sb.sb_agcount);
out_free_dir:
xfs_da_unmount(mp);
out_remove_uuid:
@ -1129,8 +1129,7 @@ xfs_unmountfs(
xfs_errortag_clearall(mp);
#endif
shrinker_free(mp->m_inodegc_shrinker);
xfs_free_perag(mp);
xfs_free_perag_range(mp, 0, mp->m_sb.sb_agcount);
xfs_errortag_del(mp);
xfs_error_sysfs_del(mp);
xchk_stats_unregister(mp->m_scrub_stats);