[svn-r25929] Description:

    Clean up EOF code within library and add 'mem_type' parameter to 'get_eof'
VFD callback, to avoid various ambiguous situations, particularly with the
multi VFD.  (Supports changes for 'avoid_truncate' feature also)

Tested on:
    MacOSX/64 10.10.1 (amazon) w/serial & parallel
    h5committest forthcoming

16 files changed, 138 insertions, 95 deletions

diff --git a/fortran/test/tH5P.f90 b/fortran/test/tH5P.f90
index c94d564..8b48be6 100644
--- a/fortran/test/tH5P.f90
+++ b/fortran/test/tH5P.f90
@@ -306,7 +306,7 @@ SUBROUTINE multi_file_test(cleanup, total_error)
   !
   CALL h5pcreate_f(H5P_FILE_ACCESS_F, fapl, error)
   CALL check("h5pcreate_f", error, total_error)
-  CALL h5pset_fapl_multi_f(fapl, relax, error)
+  CALL h5pset_fapl_multi_f(fapl, memb_map, memb_fapl, memb_name, memb_addr, relax, error)
   CALL check("h5pset_fapl_multi_f", error, total_error)
   CALL h5fopen_f (fix_filename, H5F_ACC_RDWR_F, file_id, error, access_prp = fapl)
   CALL check("h5fopen_f", error, total_error)
diff --git a/src/H5F.c b/src/H5F.c
index 58ccc37..357897e 100644
--- a/src/H5F.c
+++ b/src/H5F.c
@@ -964,6 +964,8 @@ H5Fget_filesize(hid_t file_id, hsize_t *size)
 {
     H5F_t       *file;                  /* File object for file ID */
     haddr_t     eof;                    /* End of file address */
+    haddr_t     eoa;                    /* End of allocation address */
+    haddr_t     max_eof_eoa;            /* Maximum of the EOA & EOF */
     haddr_t     base_addr;              /* Base address for the file */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
@@ -975,12 +977,15 @@ H5Fget_filesize(hid_t file_id, hsize_t *size)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID")
 
     /* Go get the actual file size */
-    if(HADDR_UNDEF == (eof = H5FD_get_eof(file->shared->lf)))
-        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get file size")
+    eof = H5FD_get_eof(file->shared->lf, H5FD_MEM_DEFAULT);
+    eoa = H5FD_get_eoa(file->shared->lf, H5FD_MEM_DEFAULT);
+    max_eof_eoa = MAX(eof, eoa);
+    if(HADDR_UNDEF == max_eof_eoa)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "file get eof/eoa requests failed")
     base_addr = H5FD_get_base_addr(file->shared->lf);
 
     if(size)
-        *size = (hsize_t)(eof + base_addr);     /* Convert relative base address for file to absolute address */
+        *size = (hsize_t)(max_eof_eoa + base_addr);     /* Convert relative base address for file to absolute address */
 
 done:
     FUNC_LEAVE_API(ret_value)
diff --git a/src/H5FD.c b/src/H5FD.c
index c556cd0..bbadd33 100644
--- a/src/H5FD.c
+++ b/src/H5FD.c
@@ -1521,19 +1521,19 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5FDget_eof(H5FD_t *file)
+H5FDget_eof(H5FD_t *file, H5FD_mem_t type)
 {
     haddr_t	ret_value;
 
     FUNC_ENTER_API(HADDR_UNDEF)
-    H5TRACE1("a", "*x", file);
+    H5TRACE2("a", "*xMt", file, type);
 
     /* Check arguments */
     if(!file || !file->cls)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
 
     /* The real work */
-    if(HADDR_UNDEF == (ret_value = H5FD_get_eof(file)))
+    if(HADDR_UNDEF == (ret_value = H5FD_get_eof(file, type)))
 	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eof request failed")
 
     /* (Note compensating for base address subtraction in internal routine) */
diff --git a/src/H5FDcore.c b/src/H5FDcore.c
index 7d643d7..d26b04f 100644
--- a/src/H5FDcore.c
+++ b/src/H5FDcore.c
@@ -138,7 +138,7 @@ static int H5FD_core_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
 static herr_t H5FD_core_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_core_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_core_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
-static haddr_t H5FD_core_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_core_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_core_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_core_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
             size_t size, void *buf);
@@ -1126,13 +1126,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_core_get_eof(const H5FD_t *_file)
+H5FD_core_get_eof(const H5FD_t *_file, H5FD_mem_t UNUSED type)
 {
     const H5FD_core_t   *file = (const H5FD_core_t*)_file;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    FUNC_LEAVE_NOAPI(MAX(file->eof, file->eoa))
+    FUNC_LEAVE_NOAPI(file->eof)
 }
 
 
diff --git a/src/H5FDdirect.c b/src/H5FDdirect.c
index 0c68315..7f313f9 100644
--- a/src/H5FDdirect.c
+++ b/src/H5FDdirect.c
@@ -137,7 +137,7 @@ static int H5FD_direct_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
 static herr_t H5FD_direct_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_direct_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_direct_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
-static haddr_t H5FD_direct_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_direct_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_direct_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_direct_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
            size_t size, void *buf);
@@ -810,13 +810,13 @@ H5FD_direct_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_direct_get_eof(const H5FD_t *_file)
+H5FD_direct_get_eof(const H5FD_t *_file, H5FD_mem_t UNUSED type)
 {
     const H5FD_direct_t  *file = (const H5FD_direct_t*)_file;
 
     FUNC_ENTER_NOAPI_NOINIT
 
-    FUNC_LEAVE_NOAPI(MAX(file->eof, file->eoa))
+    FUNC_LEAVE_NOAPI(file->eof)
 }
 
 
diff --git a/src/H5FDfamily.c b/src/H5FDfamily.c
index 1728d13..ad703ef 100644
--- a/src/H5FDfamily.c
+++ b/src/H5FDfamily.c
@@ -99,7 +99,7 @@ static int H5FD_family_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
 static herr_t H5FD_family_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_family_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_family_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t eoa);
-static haddr_t H5FD_family_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_family_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_family_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_family_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
 			       size_t size, void *_buf/*out*/);
@@ -757,7 +757,7 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
      * smaller than the size specified through H5Pset_fapl_family().  Update the actual
      * member size.
      */
-    if ((eof=H5FDget_eof(file->memb[0]))) file->memb_size = eof;
+    if ((eof=H5FDget_eof(file->memb[0], H5FD_MEM_DEFAULT))) file->memb_size = eof;
 
     ret_value=(H5FD_t *)file;
 
@@ -1047,7 +1047,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_family_get_eof(const H5FD_t *_file)
+H5FD_family_get_eof(const H5FD_t *_file, H5FD_mem_t type)
 {
     const H5FD_family_t	*file = (const H5FD_family_t*)_file;
     haddr_t		eof=0;
@@ -1063,7 +1063,7 @@ H5FD_family_get_eof(const H5FD_t *_file)
      */
     HDassert(file->nmembs > 0);
     for(i = (int)file->nmembs - 1; i >= 0; --i) {
-        if((eof = H5FD_get_eof(file->memb[i])) != 0)
+        if((eof = H5FD_get_eof(file->memb[i], type)) != 0)
             break;
         if(0 == i)
             break;
@@ -1079,7 +1079,7 @@ H5FD_family_get_eof(const H5FD_t *_file)
     eof += ((unsigned)i)*file->memb_size;
 
     /* Set return value */
-    ret_value = MAX(eof, file->eoa);
+    ret_value = eof;
 
     FUNC_LEAVE_NOAPI(ret_value)
 }
diff --git a/src/H5FDint.c b/src/H5FDint.c
index 9f02a25..4f3c234 100644
--- a/src/H5FDint.c
+++ b/src/H5FDint.c
@@ -120,7 +120,7 @@ H5FD_int_init_interface(void)
 herr_t
 H5FD_locate_signature(H5FD_t *file, const H5P_genplist_t *dxpl, haddr_t *sig_addr)
 {
-    haddr_t         addr, eoa;
+    haddr_t         addr, eoa, eof;
     uint8_t         buf[H5F_SIGNATURE_LEN];
     unsigned        n, maxpow;
     herr_t          ret_value = SUCCEED; /* Return value */
@@ -128,7 +128,10 @@ H5FD_locate_signature(H5FD_t *file, const H5P_genplist_t *dxpl, haddr_t *sig_add
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Find the least N such that 2^N is larger than the file size */
-    if(HADDR_UNDEF == (addr = H5FD_get_eof(file)) || HADDR_UNDEF == (eoa = H5FD_get_eoa(file, H5FD_MEM_SUPER)))
+    eof = H5FD_get_eof(file, H5FD_MEM_SUPER);
+    eoa = H5FD_get_eoa(file, H5FD_MEM_SUPER);
+    addr = MAX(eof, eoa);
+    if(HADDR_UNDEF == addr)
         HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to obtain EOF/EOA value")
     for(maxpow = 0; addr; maxpow++)
         addr >>= 1;
@@ -348,7 +351,7 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5FD_get_eof(const H5FD_t *file)
+H5FD_get_eof(const H5FD_t *file, H5FD_mem_t type)
 {
     haddr_t	ret_value;
 
@@ -358,7 +361,7 @@ H5FD_get_eof(const H5FD_t *file)
 
     /* Dispatch to driver */
     if(file->cls->get_eof) {
-	if(HADDR_UNDEF == (ret_value = (file->cls->get_eof)(file)))
+	if(HADDR_UNDEF == (ret_value = (file->cls->get_eof)(file, type)))
 	    HGOTO_ERROR(H5E_VFL, H5E_CANTGET, HADDR_UNDEF, "driver get_eof request failed")
     } /* end if */
     else
diff --git a/src/H5FDlog.c b/src/H5FDlog.c
index b35dcf3..8701826 100644
--- a/src/H5FDlog.c
+++ b/src/H5FDlog.c
@@ -177,7 +177,7 @@ static herr_t H5FD_log_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_log_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
 static haddr_t H5FD_log_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_log_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
-static haddr_t H5FD_log_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_log_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_log_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_log_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
             size_t size, void *buf);
@@ -1061,13 +1061,13 @@ H5FD_log_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr)
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_log_get_eof(const H5FD_t *_file)
+H5FD_log_get_eof(const H5FD_t *_file, H5FD_mem_t UNUSED type)
 {
     const H5FD_log_t	*file = (const H5FD_log_t *)_file;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    FUNC_LEAVE_NOAPI(MAX(file->eof, file->eoa))
+    FUNC_LEAVE_NOAPI(file->eof)
 } /* end H5FD_log_get_eof() */
 
 
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c
index 89f1432..70cf49a 100644
--- a/src/H5FDmpio.c
+++ b/src/H5FDmpio.c
@@ -69,6 +69,7 @@ typedef struct H5FD_mpio_t {
     haddr_t	eof;		/*end-of-file marker			*/
     haddr_t	eoa;		/*end-of-address marker			*/
     haddr_t	last_eoa;	/* Last known end-of-address marker	*/
+    haddr_t	local_eof;	/* Local end-of-file address for each process */
 } H5FD_mpio_t;
 
 /* Private Prototypes */
@@ -84,7 +85,7 @@ static herr_t H5FD_mpio_close(H5FD_t *_file);
 static herr_t H5FD_mpio_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_mpio_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_mpio_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
-static haddr_t H5FD_mpio_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_mpio_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_mpio_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
             size_t size, void *buf);
@@ -1107,6 +1108,7 @@ H5FD_mpio_open(const char *name, unsigned flags, hid_t fapl_id,
 
     /* Set the size of the file (from library's perspective) */
     file->eof = H5FD_mpi_MPIOff_to_haddr(size);
+    file->local_eof = file->eof;
 
     /* Set return value */
     ret_value=(H5FD_t*)file;
@@ -1331,7 +1333,7 @@ H5FD_mpio_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_mpio_get_eof(const H5FD_t *_file)
+H5FD_mpio_get_eof(const H5FD_t *_file, H5FD_mem_t UNUSED type)
 {
     const H5FD_mpio_t	*file = (const H5FD_mpio_t*)_file;
 
@@ -1906,9 +1908,17 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
     if(bytes_written != io_size)
         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
 
-    /* Forget the EOF value (see H5FD_mpio_get_eof()) --rpm 1999-08-06 */
+    /* Each process will keep track of its perceived EOF value locally, and
+     * ultimately we will reduce this value to the maximum amongst all
+     * processes, but until then keep the actual eof at HADDR_UNDEF just in
+     * case something bad happens before that point. (rather have a value
+     * we know is wrong sitting around rather than one that could only
+     * potentially be wrong.) */
     file->eof = HADDR_UNDEF;
 
+    if(bytes_written && ((bytes_written + addr) > file->local_eof))
+        file->local_eof = addr + bytes_written;
+
 done:
 #ifdef H5FDmpio_DEBUG
     if(H5FD_mpio_Debug[(int)'t'])
diff --git a/src/H5FDmulti.c b/src/H5FDmulti.c
index b7caa68..b1f094c 100644
--- a/src/H5FDmulti.c
+++ b/src/H5FDmulti.c
@@ -43,10 +43,6 @@
  */
 #define H5FD_MULTI_DEBUG
 
-/* Our version of MAX */
-#undef MAX
-#define MAX(X,Y)	((X)>(Y)?(X):(Y))
-
 #ifndef FALSE
 #define FALSE		0
 #endif
@@ -135,7 +131,7 @@ static herr_t H5FD_multi_query(const H5FD_t *_f1, unsigned long *flags);
 static herr_t H5FD_multi_get_type_map(const H5FD_t *file, H5FD_mem_t *type_map);
 static haddr_t H5FD_multi_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_multi_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t eoa);
-static haddr_t H5FD_multi_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_multi_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_multi_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static haddr_t H5FD_multi_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
 static herr_t H5FD_multi_free(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
@@ -1430,54 +1426,70 @@ H5FD_multi_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t eoa)
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_multi_get_eof(const H5FD_t *_file)
+H5FD_multi_get_eof(const H5FD_t *_file, H5FD_mem_t type)
 {
     const H5FD_multi_t	*file = (const H5FD_multi_t*)_file;
-    haddr_t		eof=0, tmp_eof;
-    haddr_t		eoa=0, tmp_eoa;
+    haddr_t		eof = 0;
     static const char *func="H5FD_multi_get_eof";  /* Function Name for error reporting */
 
     /* Clear the error stack */
     H5Eclear2(H5E_DEFAULT);
 
-    UNIQUE_MEMBERS(file->fa.memb_map, mt) {
-	if (file->memb[mt]) {
-            /* Retrieve EOF */
-	    H5E_BEGIN_TRY {
-		tmp_eof = H5FDget_eof(file->memb[mt]);
-	    } H5E_END_TRY;
+    if(H5FD_MEM_DEFAULT == type) {
+        UNIQUE_MEMBERS(file->fa.memb_map, mt) {
+            haddr_t tmp_eof;
+
+            if(file->memb[mt]) {
+                /* Retrieve EOF */
+                H5E_BEGIN_TRY {
+                    tmp_eof = H5FDget_eof(file->memb[mt], type);
+                } H5E_END_TRY;
+
+                if(HADDR_UNDEF == tmp_eof)
+                    H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eof", HADDR_UNDEF)
+                if(tmp_eof > 0)
+                    tmp_eof += file->fa.memb_addr[mt];
+            } else if(file->fa.relax) {
+                /*
+                 * The member is not open yet (maybe it doesn't exist). Make the
+                 * best guess about the end-of-file.
+                 */
+                tmp_eof = file->memb_next[mt];
+                assert(HADDR_UNDEF != tmp_eof);
+            } else {
+                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "bad eof", HADDR_UNDEF)
+            }
+            if(tmp_eof > eof)
+                eof = tmp_eof;
+        } END_MEMBERS;
+    } else {
+        H5FD_mem_t mmt = file->fa.memb_map[type];
 
-	    if (HADDR_UNDEF==tmp_eof)
-                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eof", HADDR_UNDEF)
-	    if (tmp_eof>0) tmp_eof += file->fa.memb_addr[mt];
+        if(H5FD_MEM_DEFAULT == mmt)
+            mmt = type;
 
-            /* Retrieve EOA */
-	    H5E_BEGIN_TRY {
-		tmp_eoa = H5FDget_eoa(file->memb[mt], mt);
-	    } H5E_END_TRY;
+	if(file->memb[mmt]) {
+            /* Retrieve EOF */
+            H5E_BEGIN_TRY {
+	        eof = H5FDget_eof(file->memb[mmt], mmt);
+            } H5E_END_TRY;
 
-	    if (HADDR_UNDEF==tmp_eoa)
-                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eoa", HADDR_UNDEF)
-	    if (tmp_eoa>0) tmp_eoa += file->fa.memb_addr[mt];
-	} else if (file->fa.relax) {
+	    if(HADDR_UNDEF == eof)
+                H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "member file has unknown eof", HADDR_UNDEF)
+	    if(eof > 0)
+                eof += file->fa.memb_addr[mmt];
+	} else if(file->fa.relax) {
 	    /*
 	     * The member is not open yet (maybe it doesn't exist). Make the
 	     * best guess about the end-of-file.
 	     */
-	    tmp_eof = file->memb_next[mt];
-	    assert(HADDR_UNDEF!=tmp_eof);
-
-	    tmp_eoa = file->memb_next[mt];
-	    assert(HADDR_UNDEF!=tmp_eoa);
-	} else {
+	    eof = file->memb_next[mmt];
+	    assert(HADDR_UNDEF != eof);
+	 } else {
             H5Epush_ret(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "bad eof", HADDR_UNDEF)
-	}
-
-	if (tmp_eof>eof) eof = tmp_eof;
-	if (tmp_eoa>eoa) eoa = tmp_eoa;
-    } END_MEMBERS;
-
-    return MAX(eoa, eof);
+	 }
+    }
+    return eof;
 }
 
 
diff --git a/src/H5FDprivate.h b/src/H5FDprivate.h
index 33332d7..7c2a564 100644
--- a/src/H5FDprivate.h
+++ b/src/H5FDprivate.h
@@ -130,7 +130,7 @@ H5_DLL htri_t H5FD_try_extend(H5FD_t *file, H5FD_mem_t type, struct H5F_t *f,
     haddr_t blk_end, hsize_t extra_requested);
 H5_DLL haddr_t H5FD_get_eoa(const H5FD_t *file, H5FD_mem_t type);
 H5_DLL herr_t H5FD_set_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t addr);
-H5_DLL haddr_t H5FD_get_eof(const H5FD_t *file);
+H5_DLL haddr_t H5FD_get_eof(const H5FD_t *file, H5FD_mem_t type);
 H5_DLL haddr_t H5FD_get_maxaddr(const H5FD_t *file);
 H5_DLL herr_t H5FD_get_feature_flags(const H5FD_t *file, unsigned long *feature_flags);
 H5_DLL herr_t H5FD_get_fs_type_map(const H5FD_t *file, H5FD_mem_t *type_map);
diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h
index ed50bc7..87edf50 100644
--- a/src/H5FDpublic.h
+++ b/src/H5FDpublic.h
@@ -267,7 +267,7 @@ typedef struct H5FD_class_t {
                     haddr_t addr, hsize_t size);
     haddr_t (*get_eoa)(const H5FD_t *file, H5FD_mem_t type);
     herr_t  (*set_eoa)(H5FD_t *file, H5FD_mem_t type, haddr_t addr);
-    haddr_t (*get_eof)(const H5FD_t *file);
+    haddr_t (*get_eof)(const H5FD_t *file, H5FD_mem_t type);
     herr_t  (*get_handle)(H5FD_t *file, hid_t fapl, void**file_handle);
     herr_t  (*read)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl,
                     haddr_t addr, size_t size, void *buffer);
@@ -348,7 +348,7 @@ H5_DLL herr_t H5FDfree(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
                        haddr_t addr, hsize_t size);
 H5_DLL haddr_t H5FDget_eoa(H5FD_t *file, H5FD_mem_t type);
 H5_DLL herr_t H5FDset_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t eoa);
-H5_DLL haddr_t H5FDget_eof(H5FD_t *file);
+H5_DLL haddr_t H5FDget_eof(H5FD_t *file, H5FD_mem_t type);
 H5_DLL herr_t H5FDget_vfd_handle(H5FD_t *file, hid_t fapl, void**file_handle);
 H5_DLL herr_t H5FDread(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
                        haddr_t addr, size_t size, void *buf/*out*/);
diff --git a/src/H5FDsec2.c b/src/H5FDsec2.c
index 4f7c3d8..99ea9b7 100644
--- a/src/H5FDsec2.c
+++ b/src/H5FDsec2.c
@@ -135,7 +135,7 @@ static int H5FD_sec2_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
 static herr_t H5FD_sec2_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_sec2_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_sec2_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
-static haddr_t H5FD_sec2_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_sec2_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_sec2_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_sec2_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
             size_t size, void *buf);
@@ -621,13 +621,13 @@ H5FD_sec2_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_sec2_get_eof(const H5FD_t *_file)
+H5FD_sec2_get_eof(const H5FD_t *_file, H5FD_mem_t UNUSED type)
 {
     const H5FD_sec2_t   *file = (const H5FD_sec2_t *)_file;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    FUNC_LEAVE_NOAPI(MAX(file->eof, file->eoa))
+    FUNC_LEAVE_NOAPI(file->eof)
 } /* end H5FD_sec2_get_eof() */
 
 
diff --git a/src/H5FDstdio.c b/src/H5FDstdio.c
index 64919ed..c02e96d 100644
--- a/src/H5FDstdio.c
+++ b/src/H5FDstdio.c
@@ -185,7 +185,7 @@ static herr_t H5FD_stdio_query(const H5FD_t *_f1, unsigned long *flags);
 static haddr_t H5FD_stdio_alloc(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
 static haddr_t H5FD_stdio_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t H5FD_stdio_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
-static haddr_t H5FD_stdio_get_eof(const H5FD_t *_file);
+static haddr_t H5FD_stdio_get_eof(const H5FD_t *_file, H5FD_mem_t type);
 static herr_t  H5FD_stdio_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
 static herr_t H5FD_stdio_read(H5FD_t *lf, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
                 size_t size, void *buf);
@@ -719,14 +719,14 @@ H5FD_stdio_set_eoa(H5FD_t *_file, H5FD_mem_t /*UNUSED*/ type, haddr_t addr)
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5FD_stdio_get_eof(const H5FD_t *_file)
+H5FD_stdio_get_eof(const H5FD_t *_file, H5FD_mem_t /*UNUSED*/ type)
 {
     const H5FD_stdio_t  *file = (const H5FD_stdio_t *)_file;
 
     /* Clear the error stack */
     H5Eclear2(H5E_DEFAULT);
 
-    return MAX(file->eof, file->eoa);
+    return(file->eof);
 } /* end H5FD_stdio_get_eof() */
 
 
diff --git a/src/H5Fint.c b/src/H5Fint.c
index 48a8d1f..31f4176 100644
--- a/src/H5Fint.c
+++ b/src/H5Fint.c
@@ -1066,7 +1066,7 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
      * Read or write the file superblock, depending on whether the file is
      * empty or not.
      */
-    if(0 == H5FD_get_eof(lf) && (flags & H5F_ACC_RDWR)) {
+    if(0 == (MAX(H5FD_get_eof(lf, H5FD_MEM_SUPER), H5FD_get_eoa(lf, H5FD_MEM_SUPER))) && (flags & H5F_ACC_RDWR)) {
         /*
          * We've just opened a fresh new file (or truncated one). We need
          * to create & write the superblock.
diff --git a/src/H5Fsuper_cache.c b/src/H5Fsuper_cache.c
index fac3bed..f3931cb 100644
--- a/src/H5Fsuper_cache.c
+++ b/src/H5Fsuper_cache.c
@@ -120,7 +120,7 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
     H5P_genplist_t     *c_plist;            /* File creation property list  */
     H5F_file_t         *shared;             /* shared part of `file'        */
     H5FD_t             *lf;                 /* file driver part of `shared' */
-    haddr_t             stored_eoa;         /*relative end-of-addr in file  */
+    haddr_t             stored_eof;         /* stored end-of-file address in file  */
     haddr_t             eof;                /* end of file address           */
     uint8_t             sizeof_addr;        /* Size of offsets in the file (in bytes) */
     uint8_t             sizeof_size;        /* Size of lengths in the file (in bytes) */
@@ -288,7 +288,7 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
         /* Remainder of "variable-sized" portion of superblock */
         H5F_addr_decode(f, (const uint8_t **)&p, &sblock->base_addr/*out*/);
         H5F_addr_decode(f, (const uint8_t **)&p, &sblock->ext_addr/*out*/);
-        H5F_addr_decode(f, (const uint8_t **)&p, &stored_eoa/*out*/);
+        H5F_addr_decode(f, (const uint8_t **)&p, &stored_eof/*out*/);
         H5F_addr_decode(f, (const uint8_t **)&p, &sblock->driver_addr/*out*/);
 
         /* Allocate space for the root group symbol table entry */
@@ -310,10 +310,10 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
         if(!H5F_addr_eq(base_addr, sblock->base_addr)) {
             /* Check if the superblock moved earlier in the file */
             if(H5F_addr_lt(base_addr, sblock->base_addr))
-                stored_eoa -= (sblock->base_addr - base_addr);
+                stored_eof -= (sblock->base_addr - base_addr);
             else
                 /* The superblock moved later in the file */
-                stored_eoa += (base_addr - sblock->base_addr);
+                stored_eof += (base_addr - sblock->base_addr);
 
             /* Adjust base address for offsets of the HDF5 data in the file */
             sblock->base_addr = base_addr;
@@ -420,7 +420,7 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
         /* Base, superblock extension, end of file & root group object header addresses */
         H5F_addr_decode(f, (const uint8_t **)&p, &sblock->base_addr/*out*/);
         H5F_addr_decode(f, (const uint8_t **)&p, &sblock->ext_addr/*out*/);
-        H5F_addr_decode(f, (const uint8_t **)&p, &stored_eoa/*out*/);
+        H5F_addr_decode(f, (const uint8_t **)&p, &stored_eof/*out*/);
         H5F_addr_decode(f, (const uint8_t **)&p, &sblock->root_addr/*out*/);
 
         /* Compute checksum for superblock */
@@ -440,10 +440,10 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
         if(!H5F_addr_eq(base_addr, sblock->base_addr)) {
             /* Check if the superblock moved earlier in the file */
             if(H5F_addr_lt(base_addr, sblock->base_addr))
-                stored_eoa -= (sblock->base_addr - base_addr);
+                stored_eof -= (sblock->base_addr - base_addr);
             else
                 /* The superblock moved later in the file */
-                stored_eoa += (base_addr - sblock->base_addr);
+                stored_eof += (base_addr - sblock->base_addr);
 
             /* Adjust base address for offsets of the HDF5 data in the file */
             sblock->base_addr = base_addr;
@@ -475,21 +475,21 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
      * possible is if the first file of a family of files was opened
      * individually.
      */
-    if(HADDR_UNDEF == (eof = H5FD_get_eof(lf)))
+    if(HADDR_UNDEF == (eof = H5FD_get_eof(lf, H5FD_MEM_DEFAULT)))
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "unable to determine file size")
 
-    /* (Account for the stored EOA being absolute offset -QAK) */
-    if((eof + sblock->base_addr) < stored_eoa)
+    /* (Account for the stored EOF being absolute offset -QAK) */
+    if((eof + sblock->base_addr) < stored_eof)
         HGOTO_ERROR(H5E_FILE, H5E_TRUNCATED, NULL,
-                    "truncated file: eof = %llu, sblock->base_addr = %llu, stored_eoa = %llu",
-                    (unsigned long long)eof, (unsigned long long)sblock->base_addr, (unsigned long long)stored_eoa)
+                    "truncated file: eof = %llu, sblock->base_addr = %llu, stored_eof = %llu",
+                    (unsigned long long)eof, (unsigned long long)sblock->base_addr, (unsigned long long)stored_eof)
 
     /*
      * Tell the file driver how much address space has already been
      * allocated so that it knows how to allocate additional memory.
      */
     /* (Account for the stored EOA being absolute offset -NAF) */
-    if(H5FD_set_eoa(lf, H5FD_MEM_SUPER, stored_eoa - sblock->base_addr) < 0)
+    if(H5FD_set_eoa(lf, H5FD_MEM_SUPER, stored_eof - sblock->base_addr) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to set end-of-address marker for file")
 
     /* Read the file's superblock extension, if there is one. */
@@ -508,7 +508,7 @@ H5F_sblock_load(H5F_t *f, hid_t dxpl_id, haddr_t UNUSED addr, void *_udata)
         /* Check for superblock extension being located "outside" the stored
          *      'eoa' value, which can occur with the split/multi VFD.
          */
-        if(H5F_addr_gt(sblock->ext_addr, stored_eoa)) {
+        if(H5F_addr_gt(sblock->ext_addr, stored_eof)) {
             /* Set the 'eoa' for the object header memory type large enough
              *  to give some room for a reasonably sized superblock extension.
              *  (This is _rather_ a kludge -QAK)
@@ -665,7 +665,7 @@ H5F_sblock_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t UNUSED addr,
         H5P_genplist_t *dxpl;               /* DXPL object */
         uint8_t         buf[H5F_MAX_SUPERBLOCK_SIZE + H5F_MAX_DRVINFOBLOCK_SIZE];  /* Superblock & driver info blockencoding buffer */
         uint8_t        *p;                  /* Ptr into encoding buffer */
-        haddr_t         rel_eoa;            /* Relative EOA for file */
+        haddr_t         rel_eof;            /* Relative EOF for file */
         size_t          superblock_size;    /* Size of superblock, in bytes */
         size_t          driver_size;        /* Size of driver info block (bytes)*/
 
@@ -705,8 +705,15 @@ H5F_sblock_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t UNUSED addr,
 
             /* Encode the address of global free-space index */
             H5F_addr_encode(f, &p, sblock->ext_addr);
-            rel_eoa = H5FD_get_eoa(f->shared->lf, H5FD_MEM_SUPER);
-            H5F_addr_encode(f, &p, (rel_eoa + sblock->base_addr));
+
+            /* Encode the end-of-file address. Note that at this point in time,
+             * the EOF value itself may not be reflective of the file's size, as
+             * we will eventually truncate the file to match the EOA value. As
+             * such, use the EOA value in its place, knowing that the current EOF
+             * value will ultimately match it. */
+            if ((rel_eof = H5FD_get_eoa(f->shared->lf, H5FD_MEM_SUPER)) == HADDR_UNDEF)
+                HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "driver get_eoa request failed")
+            H5F_addr_encode(f, &p, (rel_eof + sblock->base_addr));
 
             /* Encode the driver informaton block address */
             H5F_addr_encode(f, &p, sblock->driver_addr);
@@ -765,8 +772,14 @@ H5F_sblock_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t UNUSED addr,
             /* Encode the address of the superblock extension */
             H5F_addr_encode(f, &p, sblock->ext_addr);
 
-            rel_eoa = H5FD_get_eoa(f->shared->lf, H5FD_MEM_SUPER);
-            H5F_addr_encode(f, &p, (rel_eoa + sblock->base_addr));
+            /* At this point in time, the EOF value itself may
+             * not be reflective of the file's size, since we'll eventually
+             * truncate it to match the EOA value. As such, use the EOA value
+             * in its place, knowing that the current EOF value will
+             * ultimately match it. */
+            if ((rel_eof = H5FD_get_eoa(f->shared->lf, H5FD_MEM_SUPER)) == HADDR_UNDEF)
+                HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "driver get_eoa request failed")
+            H5F_addr_encode(f, &p, rel_eof + sblock->base_addr);
 
             /* Retrieve information for root group */
             if(NULL == (root_oloc = H5G_oloc(f->shared->root_grp)))