[svn-r27256] Merge revisions 27102 through 27255 from trunk to vds branch.

Tested: ummon

1 files changed, 49 insertions, 6 deletions

diff --git a/src/H5Fpkg.h b/src/H5Fpkg.h
index 9f70e12..175fa88 100644
--- a/src/H5Fpkg.h
+++ b/src/H5Fpkg.h
@@ -81,6 +81,21 @@
 #define H5F_SUPERBLOCK_FIXED_SIZE ( H5F_SIGNATURE_LEN                   \
         + 1) /* superblock version */
 
+/* The H5F_SUPERBLOCK_MINIMAL_VARLEN_SIZE is the minimal amount of super block
+ * variable length data guarnateed to load the sizeof offsets and the sizeof 
+ * lengths fields in all versions of the superblock.
+ *
+ * This is necessary in the V3 cache, as on the initial load, we need to 
+ * get enough of the superblock to determine its version and size so that
+ * the metadata cache can load the correct amount of data from file to 
+ * allow the second deserialization attempt to succeed.
+ *
+ * The value selected will have to be revisited for each new version 
+ * of the super block.  Note that the current value is one byte larger
+ * than it needs to be. 
+ */
+#define H5F_SUPERBLOCK_MINIMAL_VARLEN_SIZE	7
+
 /* Macros for computing variable-size superblock size */
 #define H5F_SUPERBLOCK_VARLEN_SIZE_COMMON                               \
         (2  /* freespace, and root group versions */			\
@@ -113,20 +128,38 @@
         + (sizeof_addr) /* EOF address */                               \
         + (sizeof_addr) /* root group object header address */          \
         + H5F_SIZEOF_CHKSUM) /* superblock checksum (keep this last) */
-#define H5F_SUPERBLOCK_VARLEN_SIZE(v, f) (				\
-        (v == 0 ? H5F_SUPERBLOCK_VARLEN_SIZE_V0(H5F_SIZEOF_ADDR(f), H5F_SIZEOF_SIZE(f)) : 0) \
-        + (v == 1 ? H5F_SUPERBLOCK_VARLEN_SIZE_V1(H5F_SIZEOF_ADDR(f), H5F_SIZEOF_SIZE(f)) : 0) \
-        + (v == 2 ? H5F_SUPERBLOCK_VARLEN_SIZE_V2(H5F_SIZEOF_ADDR(f)) : 0))
+#define H5F_SUPERBLOCK_VARLEN_SIZE(v, sizeof_addr, sizeof_size) (	\
+        (v == 0 ? H5F_SUPERBLOCK_VARLEN_SIZE_V0(sizeof_addr, sizeof_size) : 0) \
+        + (v == 1 ? H5F_SUPERBLOCK_VARLEN_SIZE_V1(sizeof_addr, sizeof_size) : 0) \
+        + (v == 2 ? H5F_SUPERBLOCK_VARLEN_SIZE_V2(sizeof_addr) : 0))
 
 /* Total size of superblock, depends on superblock version */
-#define H5F_SUPERBLOCK_SIZE(v, f) ( H5F_SUPERBLOCK_FIXED_SIZE           \
-        + H5F_SUPERBLOCK_VARLEN_SIZE(v, f))
+#define H5F_SUPERBLOCK_SIZE(s) ( H5F_SUPERBLOCK_FIXED_SIZE              \
+        + H5F_SUPERBLOCK_VARLEN_SIZE((s)->super_vers, (s)->sizeof_addr, (s)->sizeof_size))
 
 
 /* Forward declaration external file cache struct used below (defined in
  * H5Fefc.c) */
 typedef struct H5F_efc_t H5F_efc_t;
 
+/* Structure for passing 'user data' to superblock cache callbacks */
+typedef struct H5F_superblock_cache_ud_t {
+/* IN: */
+    H5F_t *f;               /* Pointer to file */
+    hbool_t ignore_drvrinfo; /* Indicate if the driver info should be ignored */
+/* OUT: */
+    unsigned sym_leaf_k;    /* Symbol table leaf node's 'K' value */
+    unsigned btree_k[H5B_NUM_BTREE_ID]; /* B-tree key values for each type */
+    haddr_t stored_eof;     /* End-of-file in file */
+    hbool_t drvrinfo_removed; /* Indicate if the driver info was removed */
+} H5F_superblock_cache_ud_t;
+
+/* Structure for passing 'user data' to driver info block cache callbacks */
+typedef struct H5F_drvrinfo_cache_ud_t {
+    H5F_t   *f;               /* Pointer to file */
+    haddr_t driver_addr;      /* address of driver info block */
+} H5F_drvrinfo_cache_ud_t;
+
 /* Structure for metadata & "small [raw] data" block aggregation fields */
 struct H5F_blk_aggr_t {
     unsigned long       feature_flag;   /* Feature flag type */
@@ -176,6 +209,8 @@ typedef struct H5F_mtab_t {
 typedef struct H5F_super_t {
     H5AC_info_t cache_info;     /* Cache entry information structure          */
     unsigned    super_vers;     /* Superblock version                         */
+    uint8_t	sizeof_addr;	/* Size of addresses in file                  */
+    uint8_t	sizeof_size;	/* Size of offsets in file                    */
     uint8_t     status_flags;   /* File status flags                          */
     unsigned    sym_leaf_k;     /* Size of leaves in symbol tables            */
     unsigned    btree_k[H5B_NUM_BTREE_ID]; /* B-tree key values for each type */
@@ -197,6 +232,13 @@ typedef struct H5F_super_t {
 struct H5F_file_t {
     H5FD_t	*lf; 		/* Lower level file handle for I/O	*/
     H5F_super_t *sblock;        /* Pointer to (pinned) superblock for file */
+    H5O_drvinfo_t *drvinfo;	/* Pointer to the (pinned) driver info 
+                                 * cache entry.  This field is only defined
+                                 * for older versions of the super block,
+                                 * and then only when a driver information
+                                 * block is present.  At all other times
+                                 * it should be NULL.
+                                 */
     unsigned	nrefs;		/* Ref count for times file is opened	*/
     unsigned	flags;		/* Access Permissions for file          */
     H5F_mtab_t	mtab;		/* File mount table                     */
@@ -283,6 +325,7 @@ H5FL_EXTERN(H5F_t);
 H5FL_EXTERN(H5F_file_t);
 
 H5_DLLVAR const H5AC_class_t H5AC_SUPERBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_DRVRINFO[1];
 
 
 /******************************/