diff options
| -rw-r--r-- | design/XFS_Filesystem_Structure/journaling_log.asciidoc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/design/XFS_Filesystem_Structure/journaling_log.asciidoc b/design/XFS_Filesystem_Structure/journaling_log.asciidoc index 0aec036..6109458 100644 --- a/design/XFS_Filesystem_Structure/journaling_log.asciidoc +++ b/design/XFS_Filesystem_Structure/journaling_log.asciidoc @@ -217,6 +217,18 @@ magic number to distinguish themselves. Buffer data items only appear after | +XFS_LI_BUD+ | 0x1245 | xref:BUD_Log_Item[File Block Mapping Update Done] |===== +Note that all log items (except for transaction headers) MUST start with +the following header structure. The type and size fields are baked into +each log item header, but there is not a separately defined header. + +[source, c] +---- +struct xfs_log_item { + __uint16_t magic; + __uint16_t size; +}; +---- + [[Log_Transaction_Headers]] === Transaction Headers |