MyriadFs is getting good!

5 files changed, 84 insertions, 43 deletions

diff --git a/src/md5.cpp b/src/md5.cpp
index 71f17a0..15cba17 100644
--- a/src/md5.cpp
+++ b/src/md5.cpp
@@ -61,7 +61,7 @@ void Bu::Md5::addData( const void *sVData, int iSize )
                 unsigned char *p = (unsigned char *) inbuf + t;
 
                 t = 64 - t;
-                if( iSize < t ) {
+                if( (uint32_t)iSize < t ) {
                         memcpy( p, sData, iSize );
                         return;
                 }
diff --git a/src/myriadfs.cpp b/src/myriadfs.cpp
index 8312bce..d4cf67f 100644
--- a/src/myriadfs.cpp
+++ b/src/myriadfs.cpp
@@ -78,22 +78,15 @@ Bu::MyriadFs::MyriadFs( Bu::Stream &rStore, int iBlockSize ) :
                 {
                         mStore.createStream( 2 );
                         Bu::MyriadStream ms = mStore.openStream( 2 );
-                        int32_t iTmp32 = 0;
-                        int16_t iTmp16 = 0;
-                        uint16_t uPerms = 775|typeDir;
-                        ms.write( &iUser, 4 );          // User
-                        ms.write( &iGroup, 4 );         // Group
-                        ms.write( &uPerms, 2 );         // Permissions/types
-                        ms.write( &iTmp16, 2 );         // Link count
-                        iTmp32 = 3;
-                        ms.write( &iTmp32, 4 );         // Stream index
-                        iTmp32 = 0;
-                        ms.write( &iTmp32, 4 );         // Parent inode (root's it's own parent)
-                        int64_t iTime = time(NULL);
-                        ms.write( &iTime, 8 );          // atime
-                        ms.write( &iTime, 8 );          // mtime
-                        ms.write( &iTime, 8 );          // ctime
-                        ms.write( &iTmp16, 2 );         // Name size
+                        RawStat rs;
+                        rs.iNode = 0;
+                        rs.iUser = iUser;
+                        rs.iGroup = iGroup;
+                        rs.uPerms = 0755|typeDir;
+                        rs.iLinks = 1;
+                        rs.uStreamIndex = 3;
+                        rs.iCTime = rs.iMTime = rs.iATime = time(NULL);
+                        ms.write( &rs, sizeof(RawStat) );
                 }
 
                 // Create inode 0's storage stream.
@@ -216,6 +209,17 @@ Bu::MyriadFs::Dir Bu::MyriadFs::readDir( const Bu::String &sPath )
         return readDir( iNode );
 }
 
+void Bu::MyriadFs::setTimes( const Bu::String &sPath, int64_t iATime,
+                int64_t iMTime )
+{
+        int32_t iParent = -1;
+        int32_t iNode;
+
+        iNode = lookupInode( sPath, iParent );
+        
+        setTimes( iNode, iATime, iMTime );
+}
+
 dev_t Bu::MyriadFs::devToSys( uint32_t uDev )
 {
         return (((uDev&0xFFFF0000)>>8)&0xFF00) | ((uDev&0xFF));
@@ -306,6 +310,10 @@ Bu::MyriadFs::Dir Bu::MyriadFs::readDir( int32_t iNode )
                 ms.read( &iChildNode, 4 );
                 Stat s;
                 stat( iChildNode, s, is );
+                uint8_t uLen;
+                ms.read( &uLen, 1 );
+                s.sName.setSize( uLen );
+                ms.read( s.sName.getStr(), uLen );
                 lDir.append( s );
 
                 sio << "    " << s.sName << sio.nl;
@@ -318,7 +326,7 @@ Bu::MyriadStream Bu::MyriadFs::openByInode( int32_t iNode )
 {
         int32_t iIndex = hNodeIndex.get( iNode );
         Bu::MyriadStream ms = mStore.openStream( 2 );
-        ms.setPos( mStore.getBlockSize()*iIndex );
+        ms.setPos( iIndex*sizeof(RawStat) );
         RawStat rs;
         ms.read( &rs, sizeof(RawStat) );
         switch( (rs.uPerms&typeMask) )
@@ -337,20 +345,26 @@ Bu::MyriadStream Bu::MyriadFs::openByInode( int32_t iNode )
 int32_t Bu::MyriadFs::create( int32_t iParent, const Bu::String &sName,
                 uint16_t uPerms, uint32_t uSpecial )
 {
+        if( sName.getSize() > 255 )
+        {
+                throw Bu::MyriadFsException("Filename too long, max is 255 bytes.");
+        }
         Bu::MyriadStream ms = openByInode( iParent );
         int32_t iNumChildren = 0;
         ms.read( &iNumChildren, 4 );
         iNumChildren++;
         ms.setPos( 0 );
         ms.write( &iNumChildren, 4 );
-        ms.setPos( iNumChildren*4 ); // Actually 4+(iNumChildren-1)*4 :-P
-        int32_t iNode = allocInode( sName, iParent, uPerms, uSpecial );
+        ms.setPosEnd( 0 );
+        int32_t iNode = allocInode( uPerms, uSpecial );
         ms.write( &iNode, 4 );
+        uint8_t uLen = sName.getSize();
+        ms.write( &uLen, 1 );
+        ms.write( sName.getStr(), uLen );
         return iNode;
 }
 
-int32_t Bu::MyriadFs::allocInode( const Bu::String &sName, int32_t iParent,
-                uint16_t uPerms, uint32_t uSpecial )
+int32_t Bu::MyriadFs::allocInode( uint16_t uPerms, uint32_t uSpecial )
 {
         int32_t iNode = 0;
         for(; iNode < 0xfffffff; iNode++ )
@@ -358,11 +372,12 @@ int32_t Bu::MyriadFs::allocInode( const Bu::String &sName, int32_t iParent,
                 if( !hNodeIndex.has( iNode ) )
                 {
                         Bu::MyriadStream is = mStore.openStream( 2 );
-                        is.setSize( (hNodeIndex.getSize()+1)*mStore.getBlockSize() );
-                        is.setPos( hNodeIndex.getSize()*mStore.getBlockSize() );
+                        is.setSize( (hNodeIndex.getSize()+1)*sizeof(RawStat) );
+                        is.setPos( hNodeIndex.getSize()*sizeof(RawStat) );
 
                         hNodeIndex.insert( iNode, hNodeIndex.getSize() );
                         RawStat rs;
+                        rs.iNode = iNode;
                         rs.iUser = iUser;
                         rs.iGroup = iGroup;
                         rs.uPerms = uPerms;
@@ -376,6 +391,8 @@ int32_t Bu::MyriadFs::allocInode( const Bu::String &sName, int32_t iParent,
                                 
                                 case typeDir:
                                         rs.uStreamIndex = mStore.createStream();
+                                        sio << "Creating directory node, storage: "
+                                                << rs.uStreamIndex << sio.nl;
                                         {
                                                 Bu::MyriadStream msDir = mStore.openStream(
                                                         rs.uStreamIndex
@@ -394,13 +411,10 @@ int32_t Bu::MyriadFs::allocInode( const Bu::String &sName, int32_t iParent,
                                         rs.uStreamIndex = 0;
                                         break;
                         }
-                        rs.iParentNode = iParent;
                         rs.iATime = time(NULL);
                         rs.iMTime = time(NULL);
                         rs.iCTime = time(NULL);
-                        rs.iNameSize = sName.getSize();
                         is.write( &rs, sizeof(RawStat) );
-                        is.write( sName.getStr(), sName.getSize() );
 
                         return iNode;
                 }
@@ -412,11 +426,11 @@ int32_t Bu::MyriadFs::allocInode( const Bu::String &sName, int32_t iParent,
 
 void Bu::MyriadFs::stat( int32_t iNode, Stat &rBuf, MyriadStream &rIs )
 {
-        rIs.setPos( hNodeIndex.get( iNode )*mStore.getBlockSize() );
+        rIs.setPos( hNodeIndex.get( iNode )*sizeof(RawStat) );
         RawStat rs;
         rIs.read( &rs, sizeof(RawStat) );
-        rBuf.sName.setSize( rs.iNameSize );
-        rIs.read( rBuf.sName.getStr(), rs.iNameSize );
+        if( rs.iNode != iNode )
+                throw Bu::MyriadFsException("Filesystem corruption detected.");
         rBuf.iNode = iNode;
         rBuf.iUser = rs.iUser;
         rBuf.iGroup = rs.iGroup;
@@ -445,6 +459,11 @@ void Bu::MyriadFs::stat( int32_t iNode, Stat &rBuf, MyriadStream &rIs )
         }
 }
 
+void Bu::MyriadFs::unlink( int32_t iNode )
+{
+        
+}
+
 void Bu::MyriadFs::writeHeader()
 {
         Bu::MyriadStream ms = mStore.openStream( 1 );
@@ -465,3 +484,16 @@ void Bu::MyriadFs::writeHeader()
         ms.setSize( ms.tell() );
 }
 
+void Bu::MyriadFs::setTimes( int32_t iNode, int64_t iATime, int64_t iMTime )
+{
+        RawStat rs;
+        Bu::MyriadStream is = mStore.openStream( 2 );
+
+        is.setPos( hNodeIndex.get(iNode)*sizeof(RawStat) );
+        is.read( &rs, sizeof(RawStat) );
+        rs.iATime = iATime;
+        rs.iMTime = iMTime;
+        is.setPos( hNodeIndex.get(iNode)*sizeof(RawStat) );
+        is.write( &rs, sizeof(RawStat) );
+}
+
diff --git a/src/myriadfs.h b/src/myriadfs.h
index 3eecca5..0b9c97f 100644
--- a/src/myriadfs.h
+++ b/src/myriadfs.h
@@ -32,23 +32,18 @@ namespace Bu
          *   int32_t iInode
          *   int32_t iPosition
          *
-         * The node headers or inode structures have a base size of 46 bytes.
-         * Everything else in the block is used for the name.  I.e. if you have
-         * a blocksize of 512 bytes then you wind up with a max name size of
-         * 512-46=466 characters, or a blocksize of 256 gives you 210 chraacters
-         * as a max.  The node headers are all stored in stream 2.
+         * The node headers or inode structures have a base size of 44 bytes.
+         * The name is stored in the directory format.
          * Basic node header format:
+         *   int32_t iNode
          *   int32_t iUser
          *   int32_t iGroup
          *   uint16_t uPerms
          *   int16_t iLinks
          *   uint32_t uStreamIndex
-         *   int32_t iParentNode
          *   int64_t iATime
          *   int64_t iMTime
          *   int64_t iCTime
-         *   int16_t iNameSize
-         *   char[iNameSize] sName
          *
          * Some types get special formats for their assosiated data stream, or
          * other special considerations, here's a list:
@@ -70,6 +65,8 @@ namespace Bu
          *
          * NodeTable:
          *   int32_t iInode
+         *   uint8_t uNameSize
+         *   char[uNameSize] sName
          */
         class MyriadFs
         {
@@ -144,6 +141,9 @@ namespace Bu
                                 uint32_t uSpecial );
                 void mkDir( const Bu::String &sPath, uint16_t iPerms );
                 Dir readDir( const Bu::String &sPath );
+                void setTimes( const Bu::String &sPath, int64_t iATime,
+                                int64_t iMTime );
+                void unlink( const Bu::String &sPath );
 
                 static dev_t devToSys( uint32_t uDev );
                 static uint32_t sysToDev( dev_t uDev );
@@ -152,16 +152,15 @@ namespace Bu
                 class RawStat
                 {
                 public:
+                        int32_t iNode;
                         int32_t iUser;
                         int32_t iGroup;
                         uint16_t uPerms;
                         int16_t iLinks;
                         uint32_t uStreamIndex;
-                        int32_t iParentNode;
                         int64_t iATime;
                         int64_t iMTime;
                         int64_t iCTime;
-                        int16_t iNameSize;
                 };
                 typedef Bu::Hash<int32_t, int32_t> NodeIndex;
 
@@ -173,10 +172,11 @@ namespace Bu
                 MyriadStream openByInode( int32_t iNode );
                 int32_t create( int32_t iParent, const Bu::String &sName,
                                 uint16_t uPerms, uint32_t uSpecial );
-                int32_t allocInode( const Bu::String &sName, int32_t iParent,
-                                uint16_t uPerms, uint32_t uSpecial );
+                int32_t allocInode( uint16_t uPerms, uint32_t uSpecial );
                 void stat( int32_t iNode, Stat &rBuf, MyriadStream &rIs );
+                void unlink( int32_t iNode );
                 void writeHeader();
+                void setTimes( int32_t iNode, int64_t iATime, int64_t iMTime );
 
         private:
                 Bu::Stream &rStore;
diff --git a/src/pearsonhash.cpp b/src/pearsonhash.cpp
index d068687..d753d20 100644
--- a/src/pearsonhash.cpp
+++ b/src/pearsonhash.cpp
@@ -42,7 +42,7 @@ void Bu::PearsonHash::reset()
         iValue = 0;
 }
 
-void Bu::PearsonHash::setSalt( const Bu::String &sSalt )
+void Bu::PearsonHash::setSalt( const Bu::String & /*sSalt*/ )
 {
 }
 
diff --git a/src/tools/myriadfs.cpp b/src/tools/myriadfs.cpp
index 3956311..b54390d 100644
--- a/src/tools/myriadfs.cpp
+++ b/src/tools/myriadfs.cpp
@@ -140,6 +140,13 @@ extern "C" {
                 return 0;
         }
 
+        static int myriadfs_utimens( const char *sPath,
+                        const struct timespec tv[2] )
+        {
+                pFs->setTimes( sPath, tv[0].tv_sec, tv[1].tv_sec );
+                return 0;
+        }
+
         static struct fuse_operations myriadfs_oper;
 
         int main( int argc, char *argv[] )
@@ -155,6 +162,8 @@ extern "C" {
                 myriadfs_oper.write      = myriadfs_write;
                 myriadfs_oper.create     = myriadfs_create;
                 myriadfs_oper.mknod              = myriadfs_mknod;
+                myriadfs_oper.release    = myriadfs_release;
+                myriadfs_oper.utimens    = myriadfs_utimens;
                 printf("Starting fuse_main.\n");
                 int iRet = fuse_main( argc, argv, &myriadfs_oper, NULL );
                 printf("Done with fuse_main.\n");