diff options
Diffstat (limited to 'src/H5Oprivate.h')
| -rw-r--r-- | src/H5Oprivate.h | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h index 31738a9..3188468 100644 --- a/src/H5Oprivate.h +++ b/src/H5Oprivate.h @@ -62,6 +62,8 @@ typedef struct H5O_t H5O_t; #define H5O_FHEAP_MAX_MAN_SIZE (4 * 1024) #define H5O_FHEAP_ID_LEN 8 +/* #define H5O_ENABLE_BOGUS 1 */ + /* Object header macros */ #define H5O_MESG_MAX_SIZE 65536 /*max obj header message size */ #define H5O_ALL (-1) /* Operate on all messages of type */ @@ -160,7 +162,8 @@ typedef struct H5O_copy_t { #define H5O_DRVINFO_ID 0x0014 /* Driver info message. */ #define H5O_AINFO_ID 0x0015 /* Attribute info message. */ #define H5O_REFCOUNT_ID 0x0016 /* Reference count message. */ -#define H5O_UNKNOWN_ID 0x0017 /* Placeholder message ID for unknown message. */ +#define H5O_MDJ_CONF_ID 0x0017 /* Metadata journaling config message */ +#define H5O_UNKNOWN_ID 0x0018 /* Placeholder message ID for unknown message. */ /* (this should never exist in a file) */ @@ -491,6 +494,60 @@ typedef struct H5O_ainfo_t { */ typedef uint32_t H5O_refcount_t; /* Contains # of links to object, if >1 */ + +/* + * Metadata journaling configuration message + * + * Information on whether and how metadata changes are being journaled, + * so as to reconstruct consistent metadata in the file in the event of + * a crash, stored in a superblock extension + * (Data structure in memory) + * + * The fields of the H5O_mdj_conf_t structure are discussed individually + * below: + * + * journaling_enabled: Boolean flag indicating whether metadata journaling + * is currently enabled. + * + * journal_is_external: Boolean flag indicating whether the journal is + * stored in an external file, or within the HDF5 file. + * + * If the field is TRUE, external_journal_file_path points to a + * buffer containing the path to the external journal file, and + * internal_journal_loc is undefined. + * + * If the field is FALSE, internal_journal_loc contains the base + * address of the journal within the hdf5 file, and + * external_journal_file_path_ptr must be NULL. + * + * At least for the initial implementation, journal_is_external + * will always be TRUE. + * + * internal_journal_loc: haddr_t containing the base address of the + * interal journal -- if there is one, or undefined if there + * isn't (see discussion of journal_is_external above). + * + * path_len: size_t containing the size of the buffer needed to + * contain the path to the external journal file. This field + * must contain 0 if the journal is internal. + * + * external_journal_file_path_ptr: Pointer to uint8_t. If the + * journal is stored in an external file, this field points to + * a buffer containing the path to this file. + * + * If the journal is internal, this field must be NULL. + */ +typedef struct H5O_mdj_conf_t { + + hbool_t journaling_enabled; + hbool_t journal_is_external; + haddr_t internal_journal_loc; + size_t path_len; + uint8_t * external_journal_file_path_ptr; + +} H5O_mdj_conf_t; + + /* * "Unknown" Message. * (Data structure in memory) |