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authorBrian Foster <bfoster@redhat.com>2015-08-19 09:50:12 +1000
committerDave Chinner <david@fromorbit.com>2015-08-19 09:50:12 +1000
commit5e4b5386a2c29429add601c8cfb45bb10d80c490 (patch)
tree4818a1afca016449215b471dd557d1d3bd62357c /fs/xfs/xfs_extfree_item.h
parentbc0195aad0daa2ad5b0d76cce22b167bc3435590 (diff)
xfs: disentagle EFI release from the extent count
Release of the EFI either occurs based on the reference count or the extent count. The extent count used is either the count tracked in the EFI or EFD, depending on the particular situation. In either case, the count is initialized to the final value and thus always matches the current efi_next_extent value once the EFI is completely constructed. For example, the EFI extent count is increased as the extents are logged in xfs_bmap_finish() and the full free list is always completely processed. Therefore, the count is guaranteed to be complete once the EFI transaction is committed. The EFD uses the efd_nextents counter to release the EFI. This counter is initialized to the count of the EFI when the EFD is created. Thus the EFD, as currently used, has no concept of partial EFI release based on extent count. Given that the EFI extent count is always released in whole, use of the extent count for reference counting is unnecessary. Remove this level of the API and release the EFI based on the core reference count. The efi_next_extent counter remains because it is still used to track the slot to log the next extent to free. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_extfree_item.h')
-rw-r--r--fs/xfs/xfs_extfree_item.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h
index 0ffbce32d569..399562eaf4f5 100644
--- a/fs/xfs/xfs_extfree_item.h
+++ b/fs/xfs/xfs_extfree_item.h
@@ -77,5 +77,6 @@ xfs_efd_log_item_t *xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *,
int xfs_efi_copy_format(xfs_log_iovec_t *buf,
xfs_efi_log_format_t *dst_efi_fmt);
void xfs_efi_item_free(xfs_efi_log_item_t *);
+void xfs_efi_release(struct xfs_efi_log_item *);
#endif /* __XFS_EXTFREE_ITEM_H__ */