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xfs: implement the GETFSMAP ioctl

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Introduce a new ioctl that uses the reverse mapping btree to return
information about the physical layout of the filesystem.

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
2017-03-28 14:56:37 -07:00
parent fb3c3de2f6
commit e89c041338
12 changed files with 1048 additions and 0 deletions
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84
fs/xfs/xfs_trace.h
View File

@@ -40,6 +40,8 @@ struct xfs_inode_log_format;
struct xfs_bmbt_irec;
struct xfs_btree_cur;
struct xfs_refcount_irec;
struct xfs_fsmap;
struct xfs_rmap_irec;
DECLARE_EVENT_CLASS(xfs_attr_list_class,
TP_PROTO(struct xfs_attr_list_context *ctx),
@@ -3267,6 +3269,88 @@ DEFINE_INODE_IREC_EVENT(xfs_swap_extent_rmap_remap);
DEFINE_INODE_IREC_EVENT(xfs_swap_extent_rmap_remap_piece);
DEFINE_INODE_ERROR_EVENT(xfs_swap_extent_rmap_error);
/* fsmap traces */
DECLARE_EVENT_CLASS(xfs_fsmap_class,
TP_PROTO(struct xfs_mount *mp, u32 keydev, xfs_agnumber_t agno,
struct xfs_rmap_irec *rmap),
TP_ARGS(mp, keydev, agno, rmap),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(dev_t, keydev)
__field(xfs_agnumber_t, agno)
__field(xfs_fsblock_t, bno)
__field(xfs_filblks_t, len)
__field(__uint64_t, owner)
__field(__uint64_t, offset)
__field(unsigned int, flags)
),
TP_fast_assign(
__entry->dev = mp->m_super->s_dev;
__entry->keydev = new_decode_dev(keydev);
__entry->agno = agno;
__entry->bno = rmap->rm_startblock;
__entry->len = rmap->rm_blockcount;
__entry->owner = rmap->rm_owner;
__entry->offset = rmap->rm_offset;
__entry->flags = rmap->rm_flags;
),
TP_printk("dev %d:%d keydev %d:%d agno %u bno %llu len %llu owner %lld offset %llu flags 0x%x\n",
MAJOR(__entry->dev), MINOR(__entry->dev),
MAJOR(__entry->keydev), MINOR(__entry->keydev),
__entry->agno,
__entry->bno,
__entry->len,
__entry->owner,
__entry->offset,
__entry->flags)
)
#define DEFINE_FSMAP_EVENT(name) \
DEFINE_EVENT(xfs_fsmap_class, name, \
TP_PROTO(struct xfs_mount *mp, u32 keydev, xfs_agnumber_t agno, \
struct xfs_rmap_irec *rmap), \
TP_ARGS(mp, keydev, agno, rmap))
DEFINE_FSMAP_EVENT(xfs_fsmap_low_key);
DEFINE_FSMAP_EVENT(xfs_fsmap_high_key);
DEFINE_FSMAP_EVENT(xfs_fsmap_mapping);
DECLARE_EVENT_CLASS(xfs_getfsmap_class,
TP_PROTO(struct xfs_mount *mp, struct xfs_fsmap *fsmap),
TP_ARGS(mp, fsmap),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(dev_t, keydev)
__field(xfs_daddr_t, block)
__field(xfs_daddr_t, len)
__field(__uint64_t, owner)
__field(__uint64_t, offset)
__field(__uint64_t, flags)
),
TP_fast_assign(
__entry->dev = mp->m_super->s_dev;
__entry->keydev = new_decode_dev(fsmap->fmr_device);
__entry->block = fsmap->fmr_physical;
__entry->len = fsmap->fmr_length;
__entry->owner = fsmap->fmr_owner;
__entry->offset = fsmap->fmr_offset;
__entry->flags = fsmap->fmr_flags;
),
TP_printk("dev %d:%d keydev %d:%d block %llu len %llu owner %lld offset %llu flags 0x%llx\n",
MAJOR(__entry->dev), MINOR(__entry->dev),
MAJOR(__entry->keydev), MINOR(__entry->keydev),
__entry->block,
__entry->len,
__entry->owner,
__entry->offset,
__entry->flags)
)
#define DEFINE_GETFSMAP_EVENT(name) \
DEFINE_EVENT(xfs_getfsmap_class, name, \
TP_PROTO(struct xfs_mount *mp, struct xfs_fsmap *fsmap), \
TP_ARGS(mp, fsmap))
DEFINE_GETFSMAP_EVENT(xfs_getfsmap_low_key);
DEFINE_GETFSMAP_EVENT(xfs_getfsmap_high_key);
DEFINE_GETFSMAP_EVENT(xfs_getfsmap_mapping);
#endif /* _TRACE_XFS_H */
#undef TRACE_INCLUDE_PATH