Experimental changes to permit a VFS to directly override the initial page size.

FossilOrigin-Name: 6413172435babe9097e4f961d4b88ddf68e2159d

manifest

@@ -1,5 +1,5 @@
-C Document\sthe\s--mmap\soption\sin\sthe\s--help\sscreen\sfor\skvtest.\s\sEnhance\skvtest\sso\nthat\snumeric\sarguments\scan\shave\ssuffixes\slike\s"K"\sor\s"M".\s\sAdd\skvtest\sto\sthe\nunix\smakefiles.
-D 2017-01-23T19:11:38.113
+C Experimental\schanges\sto\spermit\sa\sVFS\sto\sdirectly\soverride\sthe\sinitial\spage\ssize.
+D 2017-01-23T21:12:15.244
 F Makefile.in 5f415e7867296d678fed2e6779aea10c1318b4bc
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc b8ca53350ae545e3562403d5da2a69cec79308da
@@ -375,9 +375,9 @@ F src/os.h 8e976e59eb4ca1c0fca6d35ee803e38951cb0343
 F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
 F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
 F src/os_unix.c 30e2c43e4955db990e5b5a81e901f8aa74cc8820
-F src/os_win.c cf90abd4e50d9f56d2c20ce8e005aff55d7bd8e9
+F src/os_win.c a55b09ae1cab1a221cea3461c202168587af110c
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
-F src/pager.c 9dc72d23eebbdf992bd69f2ab954d0d3a27c7340
+F src/pager.c b0ab0c7e028a741140e4e6d6d8a52afa80b77c6f
 F src/pager.h d1e944291030351f362a0a7da9b5c3e34e603e39
 F src/parse.y 29153738a7322054359320eb00b5a4cd44389f20
 F src/pcache.c 51070ec9b8251bbf9c6ea3d35fd96a458752929e
@@ -392,7 +392,7 @@ F src/resolve.c f9bc0de45a30a450da47b3766de00be89bf9be79
 F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
 F src/select.c 3856db523b942062bca8722ba03b61c324ff94d6
 F src/shell.c 59de9acab4423a536277653f2a9dcdd1307989f3
-F src/sqlite.h.in 1971ab9709e010d52a02a1a6276d5a2f9b947476
+F src/sqlite.h.in 89b948cfa352cca946a5b20d9378df30d612f282
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 8648034aa702469afb553231677306cc6492a1ae
 F src/sqliteInt.h 525c061ae9aafc8d4720a018d82f0936d9eee5ab
@@ -1547,7 +1547,10 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 4948f7e6d2a1cfce36a7aab2f5b65be07c285ac3
-R 9f530d22e2b0a16555eacd054431a10f
-U drh
-Z 4864426d37a32c6f04be82da7889e371
+P 175bda87288c7ce15b163316159f53a60822ccad
+R 05a49ef0621a4d438c613d21cd9494c5
+T *branch * pagePerSector
+T *sym-pagePerSector *
+T -sym-trunk *
+U mistachkin
+Z d580907a4e3e3f7a77c49fbb8487d254

manifest.uuid

@@ -1 +1 @@
-175bda87288c7ce15b163316159f53a60822ccad
+6413172435babe9097e4f961d4b88ddf68e2159d

src/os_win.c

@@ -307,6 +307,7 @@ struct winVfsAppData {
 #define WINFILE_RDONLY          0x02   /* Connection is read only */
 #define WINFILE_PERSIST_WAL     0x04   /* Persistent WAL mode */
 #define WINFILE_PSOW            0x10   /* SQLITE_IOCAP_POWERSAFE_OVERWRITE */
+#define WINFILE_PPS             0x20   /* SQLITE_IOCAP_PAGE_PER_SECTOR */
 
 /*
  * The size of the buffer used by sqlite3_win32_write_debug().
@@ -3468,6 +3469,11 @@ static int winFileControl(sqlite3_file *id, int op, void *pArg){
       OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h));
       return SQLITE_OK;
     }
+    case SQLITE_FCNTL_PAGE_PER_SECTOR: {
+      winModeBit(pFile, WINFILE_PPS, (int*)pArg);
+      OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h));
+      return SQLITE_OK;
+    }
     case SQLITE_FCNTL_VFSNAME: {
       *(char**)pArg = sqlite3_mprintf("%s", pFile->pVfs->zName);
       OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h));
@@ -3559,6 +3565,7 @@ static int winSectorSize(sqlite3_file *id){
 static int winDeviceCharacteristics(sqlite3_file *id){
   winFile *p = (winFile*)id;
   return SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN |
+         ((p->ctrlFlags & WINFILE_PPS)?SQLITE_IOCAP_PAGE_PER_SECTOR:0) |
          ((p->ctrlFlags & WINFILE_PSOW)?SQLITE_IOCAP_POWERSAFE_OVERWRITE:0);
 }
 
@@ -5107,6 +5114,9 @@ static int winOpen(
   if( sqlite3_uri_boolean(zName, "psow", SQLITE_POWERSAFE_OVERWRITE) ){
     pFile->ctrlFlags |= WINFILE_PSOW;
   }
+  if( sqlite3_uri_boolean(zName, "pps", 0) ){
+    pFile->ctrlFlags |= WINFILE_PPS;
+  }
   pFile->lastErrno = NO_ERROR;
   pFile->zPath = zName;
 #if SQLITE_MAX_MMAP_SIZE>0

src/pager.c

@@ -4763,7 +4763,9 @@ int sqlite3PagerOpen(
       if( !readOnly ){
         setSectorSize(pPager);
         assert(SQLITE_DEFAULT_PAGE_SIZE<=SQLITE_MAX_DEFAULT_PAGE_SIZE);
-        if( szPageDflt<pPager->sectorSize ){
+        if( iDc&SQLITE_IOCAP_PAGE_PER_SECTOR ){
+          szPageDflt = (u32)pPager->sectorSize;
+        }else if( szPageDflt<pPager->sectorSize ){
           if( pPager->sectorSize>SQLITE_MAX_DEFAULT_PAGE_SIZE ){
             szPageDflt = SQLITE_MAX_DEFAULT_PAGE_SIZE;
           }else{

src/sqlite.h.in

@@ -579,7 +579,9 @@ int sqlite3_exec(
 ** flag indicates that a file cannot be deleted when open.  The
 ** SQLITE_IOCAP_IMMUTABLE flag indicates that the file is on
 ** read-only media and cannot be changed even by processes with
-** elevated privileges.
+** elevated privileges.  The SQLITE_IOCAP_PAGE_PER_SECTOR flag indicates
+** the initial page size for new databases should set to the sector size
+** reported by the VFS.
 */
 #define SQLITE_IOCAP_ATOMIC                 0x00000001
 #define SQLITE_IOCAP_ATOMIC512              0x00000002
@@ -595,6 +597,7 @@ int sqlite3_exec(
 #define SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN  0x00000800
 #define SQLITE_IOCAP_POWERSAFE_OVERWRITE    0x00001000
 #define SQLITE_IOCAP_IMMUTABLE              0x00002000
+#define SQLITE_IOCAP_PAGE_PER_SECTOR        0x00004000
 
 /*
 ** CAPI3REF: File Locking Levels
@@ -729,6 +732,7 @@ struct sqlite3_file {
 ** <li> [SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN]
 ** <li> [SQLITE_IOCAP_POWERSAFE_OVERWRITE]
 ** <li> [SQLITE_IOCAP_IMMUTABLE]
+** <li> [SQLITE_IOCAP_PAGE_PER_SECTOR]
 ** </ul>
 **
 ** The SQLITE_IOCAP_ATOMIC property means that all writes of
@@ -1012,6 +1016,15 @@ struct sqlite3_io_methods {
 ** The [SQLITE_FCNTL_RBU] opcode is implemented by the special VFS used by
 ** the RBU extension only.  All other VFS should return SQLITE_NOTFOUND for
 ** this opcode.  
+**
+** <li>[[SQLITE_FCNTL_PAGE_PER_SECTOR]]
+** ^The [SQLITE_FCNTL_PAGE_PER_SECTOR] opcode is used to set or query the
+** persistent "page-per-sector" or "PPS" setting. The PPS setting determines
+** the [SQLITE_IOCAP_PAGE_PER_SECTOR] bit of the xDeviceCharacteristics
+** methods. The fourth parameter to [sqlite3_file_control()] for this opcode
+** should be a pointer to an integer.  That integer is 0 to disable
+** page-per-sector mode or 1 to enable page-per-sector mode.  If the integer
+** is -1, then it is overwritten with the current page-per-sector mode setting.
 ** </ul>
 */
 #define SQLITE_FCNTL_LOCKSTATE               1
@@ -1043,6 +1056,7 @@ struct sqlite3_io_methods {
 #define SQLITE_FCNTL_JOURNAL_POINTER        28
 #define SQLITE_FCNTL_WIN32_GET_HANDLE       29
 #define SQLITE_FCNTL_PDB                    30
+#define SQLITE_FCNTL_PAGE_PER_SECTOR        31
 
 /* deprecated names */
 #define SQLITE_GET_LOCKPROXYFILE      SQLITE_FCNTL_GET_LOCKPROXYFILE