[svn-r12991] Description:

    Reduce the size of some of the group information to more reasonable bounds.
(16-bit values instead of 32-bit values).

Tested on:
    Linux/32 2.6 (chicago)
    Linux/64 2.6 (chicago2)

4 files changed, 34 insertions, 20 deletions

diff --git a/src/H5Oginfo.c b/src/H5Oginfo.c
index f7c834f..95a19ab 100644
--- a/src/H5Oginfo.c
+++ b/src/H5Oginfo.c
@@ -119,12 +119,12 @@ H5O_ginfo_decode(H5F_t UNUSED *f, hid_t UNUSED dxpl_id, const uint8_t *p)
     ginfo->track_corder = (flags & H5O_GINFO_FLAG_TRACK_CORDER) ? TRUE : FALSE;
 
     /* Get the max. # of links to store compactly & the min. # of links to store densely */
-    UINT32DECODE(p, ginfo->max_compact)
-    UINT32DECODE(p, ginfo->min_dense)
+    UINT16DECODE(p, ginfo->max_compact)
+    UINT16DECODE(p, ginfo->min_dense)
 
     /* Get the estimated # of entries & name lengths */
-    UINT32DECODE(p, ginfo->est_num_entries)
-    UINT32DECODE(p, ginfo->est_name_len)
+    UINT16DECODE(p, ginfo->est_num_entries)
+    UINT16DECODE(p, ginfo->est_name_len)
 
     /* Set return value */
     ret_value = ginfo;
@@ -174,12 +174,12 @@ H5O_ginfo_encode(H5F_t UNUSED *f, uint8_t *p, const void *_mesg)
     *p++ = flags;
 
     /* Store the max. # of links to store compactly & the min. # of links to store densely */
-    UINT32ENCODE(p, ginfo->max_compact)
-    UINT32ENCODE(p, ginfo->min_dense)
+    UINT16ENCODE(p, ginfo->max_compact)
+    UINT16ENCODE(p, ginfo->min_dense)
 
     /* Estimated # of entries & name lengths */
-    UINT32ENCODE(p, ginfo->est_num_entries)
-    UINT32ENCODE(p, ginfo->est_name_len)
+    UINT16ENCODE(p, ginfo->est_num_entries)
+    UINT16ENCODE(p, ginfo->est_name_len)
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5O_ginfo_encode() */
@@ -257,10 +257,10 @@ H5O_ginfo_size(const H5F_t UNUSED *f, const void UNUSED *_mesg)
     /* Set return value */
     ret_value = 1 +                     /* Version */
                 1 +                     /* Flags */
-                4 +                     /* "Max compact" links */
-                4 +                     /* "Min dense" links */
-                4 +                     /* Estimated # of entries in group */
-                4;                      /* Estimated length of name of entry in group */
+                2 +                     /* "Max compact" links */
+                2 +                     /* "Min dense" links */
+                2 +                     /* Estimated # of entries in group */
+                2;                      /* Estimated length of name of entry in group */
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O_ginfo_size() */
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index 18a0804..657da10 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -188,22 +188,22 @@ struct H5O_t {
     H5AC_info_t cache_info; /* Information for H5AC cache functions, _must_ be */
                             /* first field in structure */
 
-    /* General information */
+    /* General information (stored) */
     unsigned	version;		/*version number		     */
     unsigned	nlink;			/*link count			     */
 
-    /* Time information */
+    /* Time information (stored) */
     time_t      atime;                  /*access time 			     */
     time_t      mtime;                  /*modification time 		     */
     time_t      ctime;                  /*change time 			     */
 
-    /* Message management */
+    /* Message management (stored, indirectly) */
     size_t	nmesgs;			/*number of messages		     */
     size_t	alloc_nmesgs;		/*number of message slots	     */
     H5O_mesg_t	*mesg;			/*array of messages		     */
     size_t      skipped_mesg_size;      /*size of skipped messages (for sanity checking) */
 
-    /* Chunk management */
+    /* Chunk management (not stored) */
     size_t	nchunks;		/*number of chunks		     */
     size_t	alloc_nchunks;		/*chunks allocated		     */
     H5O_chunk_t *chunk;			/*array of chunks		     */
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h
index 05b85e3..61fa573 100644
--- a/src/H5Oprivate.h
+++ b/src/H5Oprivate.h
@@ -315,12 +315,12 @@ typedef struct H5O_ginfo_t {
     hbool_t     track_corder;           /* Are creation order values tracked on links? */
 
     /* (storage management info) */
-    uint32_t	max_compact;		/* Maximum # of compact links        */
-    uint32_t	min_dense;		/* Minimum # of "dense" links        */
+    uint16_t	max_compact;		/* Maximum # of compact links        */
+    uint16_t	min_dense;		/* Minimum # of "dense" links        */
 
     /* (initial object header size info) */
-    uint32_t	est_num_entries;	/* Estimated # of entries in group   */
-    uint32_t	est_name_len;		/* Estimated length of entry name    */
+    uint16_t	est_num_entries;	/* Estimated # of entries in group   */
+    uint16_t	est_name_len;		/* Estimated length of entry name    */
 } H5O_ginfo_t;
 
 /*
diff --git a/src/H5Pgcpl.c b/src/H5Pgcpl.c
index 16046db..cc9449a 100644
--- a/src/H5Pgcpl.c
+++ b/src/H5Pgcpl.c
@@ -235,6 +235,14 @@ H5Pset_link_phase_change(hid_t plist_id, unsigned max_compact, unsigned min_dens
     FUNC_ENTER_API(H5Pset_link_phase_change, FAIL)
     H5TRACE3("e","iIuIu",plist_id,max_compact,min_dense);
 
+    /* Range check values */
+    if(max_compact < min_dense)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "max compact value must be >= min dense value")
+    if(max_compact > 65535)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "max compact value must be < 65536")
+    if(min_dense > 65535)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "min dense value must be < 65536")
+
     /* Get the plist structure */
     if(NULL == (plist = H5P_object_verify(plist_id, H5P_GROUP_CREATE)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
@@ -329,6 +337,12 @@ H5Pset_est_link_info(hid_t plist_id, unsigned est_num_entries, unsigned est_name
     FUNC_ENTER_API(H5Pset_est_link_info, FAIL)
     H5TRACE3("e","iIuIu",plist_id,est_num_entries,est_name_len);
 
+    /* Range check values */
+    if(est_num_entries > 65535)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "est. number of entries must be < 65536")
+    if(est_name_len > 65535)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "est. name length must be < 65536")
+
     /* Get the plist structure */
     if(NULL == (plist = H5P_object_verify(plist_id, H5P_GROUP_CREATE)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")