[svn-r10776] Purpose: Bug fix

Description: See details from Bug #213.  Family member file size wasn't saved
anywhere in file.  When family file is opened, the first member size determine
the member size.

Solution:  This is the first step of fixing this bug.  Member size and name
template(unused at this stage) are saved in file superblock.  When file is reopened,
the size passed in through H5Pset_fapl_family is checked against the size saved
in superblock.  A different size will trigger a failure with an error message
indicating the right size.  Wrong driver to open family file will cause a failure,
too.

The second step will change multi driver that wrong driver will cause a failure.

Platforms tested: fuss and h5committest

1 files changed, 159 insertions, 31 deletions

diff --git a/src/H5FDfamily.c b/src/H5FDfamily.c
index 83e6c75..28824e3 100644
--- a/src/H5FDfamily.c
+++ b/src/H5FDfamily.c
@@ -58,7 +58,8 @@ static hid_t H5FD_FAMILY_g = 0;
 typedef struct H5FD_family_t {
     H5FD_t	pub;		/*public stuff, must be first		*/
     hid_t	memb_fapl_id;	/*file access property list for members	*/
-    hsize_t	memb_size;	/*maximum size of each member file	*/
+    hsize_t	memb_size;	/*actual size of each member file	*/
+    hsize_t	pmem_size;	/*member size passed in from property	*/
     unsigned	nmembs;		/*number of family members		*/
     unsigned	amembs;		/*number of member slots allocated	*/
     H5FD_t	**memb;		/*dynamic array of member pointers	*/
@@ -84,6 +85,11 @@ static void *H5FD_family_fapl_copy(const void *_old_fa);
 static herr_t H5FD_family_fapl_free(void *_fa);
 static void *H5FD_family_dxpl_copy(const void *_old_dx);
 static herr_t H5FD_family_dxpl_free(void *_dx);
+static hsize_t H5FD_family_sb_size(H5FD_t *_file);
+static herr_t H5FD_family_sb_encode(H5FD_t *_file, char *name/*out*/,
+		     unsigned char *buf/*out*/);
+static herr_t H5FD_family_sb_decode(H5FD_t *_file, const char *name, 
+                    const unsigned char *buf);
 static H5FD_t *H5FD_family_open(const char *name, unsigned flags,
 				hid_t fapl_id, haddr_t maxaddr);
 static herr_t H5FD_family_close(H5FD_t *_file);
@@ -103,10 +109,10 @@ static herr_t H5FD_family_flush(H5FD_t *_file, hid_t dxpl_id, unsigned closing);
 static const H5FD_class_t H5FD_family_g = {
     "family",					/*name			*/
     HADDR_MAX,					/*maxaddr		*/
-    H5F_CLOSE_WEAK,				/* fc_degree		*/
-    NULL,					/*sb_size		*/
-    NULL,					/*sb_encode		*/
-    NULL,					/*sb_decode		*/
+    H5F_CLOSE_WEAK,				/*fc_degree		*/
+    H5FD_family_sb_size,			/*sb_size		*/
+    H5FD_family_sb_encode,			/*sb_encode		*/
+    H5FD_family_sb_decode,			/*sb_decode		*/
     sizeof(H5FD_family_fapl_t),			/*fapl_size		*/
     H5FD_family_fapl_get,			/*fapl_get		*/
     H5FD_family_fapl_copy,			/*fapl_copy		*/
@@ -550,6 +556,139 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5FD_family_sb_size
+ *
+ * Purpose:	Returns the size of the private information to be stored in
+ *		the superblock.
+ *
+ * Return:	Success:	The super block driver data size.
+ *
+ *		Failure:	never fails
+ *
+ * Programmer:	Raymond Lu
+ *              Tuesday, May 10, 2005
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static hsize_t
+H5FD_family_sb_size(H5FD_t *_file)
+{
+    H5FD_family_t	*file = (H5FD_family_t*)_file;
+    hsize_t		ret_value = 0; /*size of header*/
+
+    FUNC_ENTER_NOAPI(H5FD_family_sb_size, FAIL)
+
+    /* 8 bytes field for the size of member file size field should be 
+     * enough for now. */
+    ret_value += 8;
+
+    /* name template, NULL termination included */
+    ret_value += HDstrlen(file->name) + 1;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FD_family_sb_encode
+ *
+ * Purpose:	Encode driver information for the superblock. The NAME
+ *		argument is a nine-byte buffer which will be initialized with
+ *		an eight-character name/version number and null termination.
+ *
+ *		The encoding is the member file size and name template.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *              Tuesday, May 10, 2005
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_family_sb_encode(H5FD_t *_file, char *name/*out*/,
+		     unsigned char *buf/*out*/)
+{
+    H5FD_family_t	*file = (H5FD_family_t*)_file;
+    unsigned char	*p = buf;
+    herr_t ret_value=SUCCEED;   /* Return value */
+
+    FUNC_ENTER_NOAPI(H5FD_family_sb_encode, FAIL)
+
+    /* Name and version number */
+    strncpy(name, "NCSAfami",8);
+    name[8] = '\0';
+
+    /* copy member file size */
+    UINT64ENCODE(buf, file->memb_size);
+    p += 8;
+     
+    /* copy name template */
+    HDmemcpy(p, file->name, HDstrlen(file->name) + 1);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5FD_family_sb_decode
+ *
+ * Purpose:	Decodes the superblock information for this driver. The NAME
+ *		argument is the eight-character (plus null termination) name
+ *		stored in the file.
+ *
+ *		The FILE argument is updated according to the information in
+ *		the superblock. 
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Raymond Lu
+ *              Tuesday, May 10, 2005
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5FD_family_sb_decode(H5FD_t *_file, const char *name, const unsigned char *buf)
+{
+    H5FD_family_t	*file = (H5FD_family_t*)_file;
+    unsigned char       *p = buf;
+    uint64_t             msize;
+    char                err_msg[128];
+    herr_t ret_value=SUCCEED;   /* Return value */
+    
+    FUNC_ENTER_NOAPI(H5FD_family_sb_decode, FAIL)
+
+    /* Read member file size. Skip name template for now although it's saved. */
+    UINT64DECODE(p, msize);
+  
+    /* Default - use the saved member size */ 
+    if(file->pmem_size == H5F_FAMILY_DEFAULT)
+       file->memb_size = msize;
+
+    /* Check if member size is correct */
+    if(file->memb_size != msize) {
+        sprintf(err_msg, "family member size should be %lu", msize);
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, err_msg)
+    }
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+}
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5FD_family_open
  *
  * Purpose:	Creates and/or opens a family of files as an HDF5 file.
@@ -581,7 +720,7 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
     H5FD_family_t	*file=NULL;
     H5FD_t     		*ret_value=NULL;
     char		memb_name[4096], temp[4096];
-    hsize_t		eof1=HADDR_UNDEF, eof2=HADDR_UNDEF;
+    hsize_t		eof=HADDR_UNDEF;
     unsigned		t_flags = flags & ~H5F_ACC_CREAT;
     H5P_genplist_t      *plist;      /* Property list pointer */
 
@@ -600,7 +739,8 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
         file->memb_fapl_id = H5P_FILE_ACCESS_DEFAULT;
         if(H5I_inc_ref(file->memb_fapl_id)<0)
             HGOTO_ERROR(H5E_VFL, H5E_CANTINC, NULL, "unable to increment ref count on VFL driver")
-        file->memb_size = 1024*1024*1024; /*1GB*/
+        file->memb_size = 1024*1024*1024; /*1GB. Actual member size to be updated later */
+        file->pmem_size = 1024*1024*1024; /*1GB. Member size passed in through property */
     } else {
         H5FD_family_fapl_t *fa;
 
@@ -617,7 +757,8 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
                 HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
             file->memb_fapl_id = H5P_copy_plist(plist);
         } /* end else */
-        file->memb_size = fa->memb_size;
+        file->memb_size = fa->memb_size; /* Actual member size to be updated later */
+        file->pmem_size = fa->memb_size; /* Member size passed in through property */
     }
     file->name = H5MM_strdup(name);
     file->flags = flags;
@@ -662,27 +803,11 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
         file->nmembs++;
     }
 
-    /* 
-     * Get file size of the first 2 member files if exist.  Check if user sets 
-     * reasonable member size.   
+    /* If the file is reopened and there's only one member file existing, this file maybe 
+     * smaller than the size specified through H5Pset_fapl_family().  Update the actual
+     * member size.
      */
-    if(HADDR_UNDEF==(eof1 = H5FD_get_eof(file->memb[0])))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, NULL, "file get eof1 request failed")
-    if(file->memb[1] && (HADDR_UNDEF==(eof2 = H5FD_get_eof(file->memb[1]))))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, NULL, "file get eof2 request failed")
-            
-    if(eof1 && (eof2==HADDR_UNDEF || !eof2)) {  
-        /* If there is only 1 member file, new member size can't be smaller than 
-         * current member size. 
-         */
-        if(file->memb_size<eof1)
-            file->memb_size = eof1;
-    } else if(eof1 && eof2) { 
-        /* If there are at least 2 member files, new member size can only be equal 
-         * to the 1st member size
-         */
-        file->memb_size = eof1;
-    }
+    if ((eof=H5FDget_eof(file->memb[0]))) file->memb_size = eof;
 
     ret_value=(H5FD_t *)file;
 
@@ -692,6 +817,8 @@ done:
         unsigned nerrors=0;     /* Number of errors closing member files */
         unsigned u;             /* Local index variable */
 
+        /* Close as many members as possible. Use private function here to avoid clearing
+         * the error stack. We need the error message to indicate wrong member file size. */
         for (u=0; u<file->nmembs; u++)
             if (file->memb[u])
                 if (H5FD_close(file->memb[u])<0)
@@ -739,10 +866,11 @@ H5FD_family_close(H5FD_t *_file)
 
     FUNC_ENTER_NOAPI(H5FD_family_close, FAIL)
 
-    /* Close as many members as possible */
+    /* Close as many members as possible. Use private function here to avoid clearing
+     * the error stack. We need the error message to indicate wrong member file size. */
     for (u=0; u<file->nmembs; u++) {
         if (file->memb[u]) {
-            if (H5FDclose(file->memb[u])<0)
+            if (H5FD_close(file->memb[u])<0)
                 nerrors++;
             else
                 file->memb[u] = NULL;
@@ -929,7 +1057,7 @@ H5FD_family_set_eoa(H5FD_t *_file, haddr_t eoa)
             if (NULL==file->memb[u])
                 HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to open member file")
         }
-        
+    
         /* Set the EOA marker for the member */
         H5_CHECK_OVERFLOW(file->memb_size,hsize_t,haddr_t);
         if (addr>(haddr_t)file->memb_size) {