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xfs: allocate sparse inode chunks on full chunk allocation failure

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xfs_ialloc_ag_alloc() makes several attempts to allocate a full inode
chunk. If all else fails, reduce the allocation to the sparse length and
alignment and attempt to allocate a sparse inode chunk.

If sparse chunk allocation succeeds, check whether an inobt record
already exists that can track the chunk. If so, inherit and update the
existing record. Otherwise, insert a new record for the sparse chunk.

Create helpers to align sparse chunk inode records and insert or update
existing records in the inode btrees. The xfs_inobt_insert_sprec()
helper implements the merge or update semantics required for sparse
inode records with respect to both the inobt and finobt. To update the
inobt, either insert a new record or merge with an existing record. To
update the finobt, use the updated inobt record to either insert or
replace an existing record.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Brian Foster
2015-05-29 09:18:32 +10:00
committed by Dave Chinner
parent 4148c347a4
commit 56d1115c9b
4 changed files with 401 additions and 14 deletions
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47
fs/xfs/xfs_trace.h
View File

@@ -738,6 +738,53 @@ TRACE_EVENT(xfs_iomap_prealloc_size,
__entry->blocks, __entry->shift, __entry->writeio_blocks)
)
TRACE_EVENT(xfs_irec_merge_pre,
TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t agino,
uint16_t holemask, xfs_agino_t nagino, uint16_t nholemask),
TP_ARGS(mp, agno, agino, holemask, nagino, nholemask),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(xfs_agnumber_t, agno)
__field(xfs_agino_t, agino)
__field(uint16_t, holemask)
__field(xfs_agino_t, nagino)
__field(uint16_t, nholemask)
),
TP_fast_assign(
__entry->dev = mp->m_super->s_dev;
__entry->agno = agno;
__entry->agino = agino;
__entry->holemask = holemask;
__entry->nagino = nagino;
__entry->nholemask = holemask;
),
TP_printk("dev %d:%d agno %d inobt (%u:0x%x) new (%u:0x%x)",
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->agno,
__entry->agino, __entry->holemask, __entry->nagino,
__entry->nholemask)
)
TRACE_EVENT(xfs_irec_merge_post,
TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t agino,
uint16_t holemask),
TP_ARGS(mp, agno, agino, holemask),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(xfs_agnumber_t, agno)
__field(xfs_agino_t, agino)
__field(uint16_t, holemask)
),
TP_fast_assign(
__entry->dev = mp->m_super->s_dev;
__entry->agno = agno;
__entry->agino = agino;
__entry->holemask = holemask;
),
TP_printk("dev %d:%d agno %d inobt (%u:0x%x)", MAJOR(__entry->dev),
MINOR(__entry->dev), __entry->agno, __entry->agino,
__entry->holemask)
)
#define DEFINE_IREF_EVENT(name) \
DEFINE_EVENT(xfs_iref_class, name, \
TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip), \