X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=fusefile.c;h=62431d28a6894ba2973388ee7999971bb0bb2e2e;hb=f46816d1356171d1e9b00db4e151ff5230fbe55d;hp=e05b90ebdf4c8a3de0c45d56a562dc71f4031fc4;hpb=fc099867ede77333d8a8557a490103e8777e8359;p=rrq%2Ffusefile.git

diff --git a/fusefile.c b/fusefile.c
index e05b90e..62431d2 100644
--- a/fusefile.c
+++ b/fusefile.c
@@ -837,6 +837,40 @@ static int fusefile_write(const char *path, const char *buf, size_t size,
     return size;
 }
 
+#define PUSHBUF 104857600
+/**
+ * Write data from overlay to source.
+ */
+static void push_oly(off_t beg, off_t end) {
+    static char * buffer = 0;
+    // Pretend that there isn't an overlay
+    char *filename = overlay.source.filename;
+    if ( buffer == 0 ) {
+	buffer = malloc( PUSHBUF );
+	if ( buffer == 0 ) {
+	    fprintf( stderr, "** OOM!!\n" );
+	    exit( 1 );
+	}
+    }
+    overlay.source.filename = 0;
+    while ( beg < end ) {
+	off_t size = end - beg;
+	if ( size > PUSHBUF ) {
+	    size = PUSHBUF;
+	}
+	if ( lseek( overlay.source.fd, beg, SEEK_SET ) < 0 ) {
+	    fprintf( stderr, "** Cannot seek overlay at %ld\n", beg );
+	    break;
+	}
+	size = read( overlay.source.fd, buffer, size );
+	if ( write_block( beg, buffer, size ) < 0 ) {
+	    fprintf( stderr, "** Cannot push %ld bytes at %ld\n", size, beg );
+	}
+	beg += size;
+    }
+    overlay.source.filename = filename;
+}
+
 static void fusefile_destroy(void *data) {
     char *mnt = (char*) data; // As passed to fuse_main
 #if DEBUG
@@ -922,7 +956,7 @@ void *fusefile_init(struct fuse_conn_info *fci) {
 /**
  * Dump the current fragmentation to stdout.
  */
-static int dump_fragments() {
+static int dump_fragments(int push) {
     int oly = 0;
     int src = 0;
     size_t pos = 0;
@@ -932,25 +966,33 @@ static int dump_fragments() {
 	for ( ; src < sources.count && 
 		  ENDSOURCE( sources.array[ src ] ) <= x; src++ ) {
 	    // Dump sources.array[src] in full
-	    fprintf( stdout, "%s/%ld:%ld\n",
-		     sources.array[ src ].filename,
-		     pos - sources.array[ src ].start,
-		     sources.array[ src ].to );
+	    if ( !push ) {
+		fprintf( stdout, "%s/%ld:%ld\n",
+			 sources.array[ src ].filename,
+			 pos - sources.array[ src ].start,
+			 sources.array[ src ].to );
+	    }
 	    pos = ENDSOURCE( sources.array[ src ] );
 	}
 	if ( ( src < sources.count ) && ( sources.array[ src ].start < x ) ) {
 	    // Dump sources.array[src] up to x;
-	    fprintf( stdout, "%s/%ld:%ld\n",
-		     sources.array[ src ].filename,
-		     pos - sources.array[ src ].start,
-		     x - sources.array[ src ].start );
+	    if ( !push ) {
+		fprintf( stdout, "%s/%ld:%ld\n",
+			 sources.array[ src ].filename,
+			 pos - sources.array[ src ].start,
+			 x - sources.array[ src ].start );
+	    }
 	    pos = ENDSOURCE( sources.array[ src ] );
 	}
 	if ( oly < overlay.count ) {
-	    fprintf( stdout, "%s/%ld:%ld\n",
-		     overlay.source.filename,
-		     overlay.table[ oly ].beg,
-		     overlay.table[ oly ].end );
+	    if ( !push ) {
+		fprintf( stdout, "%s/%ld:%ld\n",
+			 overlay.source.filename,
+			 overlay.table[ oly ].beg,
+			 overlay.table[ oly ].end );
+	    } else {
+		push_oly( overlay.table[ oly ].beg, overlay.table[ oly ].end );
+	    }
 	    pos = overlay.table[ oly++ ].end;
 	}
 	for ( ; src < sources.count &&
@@ -1092,7 +1134,10 @@ int main(int argc, char *argv[])
     }
     fuseargc = setup_argv( fuseargc, &argv );
     if ( strcmp( "-dump", argv[ 1 ] ) == 0 ) {
-	return dump_fragments();
+	return dump_fragments( 0 );
+    }
+    if ( strcmp( "-push", argv[ 1 ] ) == 0 ) {
+	return dump_fragments( 1 );
     }
     struct fuse_args args = FUSE_ARGS_INIT( fuseargc, argv );
     if ( fuse_parse_cmdline( &args, &mnt, &mt, &fg ) ) {