Update the fusd examples now that multiple registration is no longer bitrotted.

git-svn-id: http://svn.xiph.org/trunk/fusd@12355 0101bb08-14d6-0310-b084-bc0e0c8e3800

Makefile

@@ -23,16 +23,19 @@ export
 
 ####################################################
 
-SUBDIRS = kfusd libfusd
+SUBDIRS = kfusd libfusd examples
 
 default: 
 	$(MAKE) -C libfusd 
 	$(MAKE) -C kfusd
+	$(MAKE) -C examples
 
 install:
 	$(MAKE) -C libfusd install
 	$(MAKE) -C kfusd install
+	$(MAKE) -C examples install
 
 clean:
 	$(MAKE) -C kfusd clean
 	$(MAKE) -C libfusd clean
+	$(MAKE) -C examples clean

doc/Makefile

@@ -1,13 +1,10 @@
 default: docs
 
 clean:
-	@rm -f *.[ch].example
+	rm -f *.[ch].example
+	rm -f fusd.dvi
 
-examples:
-	@rm -f *.[ch].example
-	@./make-examples.pl ../examples/*.[ch]
-
-docs: examples
+docs:
 	latex fusd
 	latex fusd
 

doc/make-examples.pl

@@ -1,50 +0,0 @@
-#!/usr/bin/perl -w
-
-
-foreach $path (@ARGV) {
-    $writing = 0;
-
-    if (!open(IN, $path)) {
-	print "trying to open $path: $!\n";
-	next;
-    }
-
-    while ($line = <IN>) {
-	if ($line =~ /EXAMPLE (\w*) ([\w\-\.]*)/) {
-	    $command = $1;
-	    $filename = $2 . ".example";
-
-	    if ($command eq 'START') {
-		if ($writing == 0) {
-		    if (!open(OUT, ">>$filename")) {
-			print "trying to write to $filename: $!\n";
-		    } else {
-			print "$path: writing to $filename\n";
-			$writing = 1;
-		    }
-		} else {
-		    print "$path: got $line while already writing!\n";
-		}
-	    }
-
-	    if ($command eq 'STOP') {
-		if ($writing == 1) {
-		    close(OUT);
-		    $writing = 0;
-		} else {
-		    chomp($line);
-		    die "$path line $.: got $line when not writing!\n";
-		}
-	    }
-	} else {
-	    if ($writing && $line !~ /SKIPLINE/) {
-		print OUT $line;
-	    }
-	}
-    }
-    if ($writing) {
-	close(OUT);
-    }
-    close(IN);
-}
-

examples/Makefile

@@ -0,0 +1,24 @@
+SRC  = console-read.c drums3.c echo.c helloworld.c logring.c pager.c\
+	drums2.c drums.c ioctl.c uid-filter.c
+OBJ  = console-read.o drums3.o echo.o helloworld.o logring.o pager.o\
+	drums2.o drums.o ioctl.o uid-filter.o
+TARGETS = console-read drums3 echo helloworld logring pager\
+	drums2 drums ioctl uid-filter
+
+default: $(TARGETS)
+
+install: $(TARGETS)
+
+clean:
+	rm -f *.o *.d $(TARGETS) gmon.out *~ 
+
+$(TARGETS): %: %.c
+	$(CC) $(GCF) $< -o $@ ../libfusd/libfusd.a 
+
+%.d: %.c
+	$(CC) -M $(CFLAGS) $< > $@.$$$$; sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; rm -f $@.$$$$
+
+ifeq ($(MAKECMDGOALS),target)
+include $(SRC:.c=.d)
+endif
+

examples/console-read.c

@@ -40,7 +40,7 @@
  * need a template from which to start on a real driver, use pager.c
  * instead.
  *
- * $Id: console-read.c,v 1.4 2003/07/11 22:29:38 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -57,7 +57,7 @@ int do_open_or_close(struct fusd_file_info *file)
 }
 
 /* EXAMPLE START console-read.c */
-int do_read(struct fusd_file_info *file, char *user_buffer, 
+ssize_t do_read(struct fusd_file_info *file, char *user_buffer, 
 	    size_t user_length, loff_t *offset)
 {
   char buf[128];
@@ -88,7 +88,7 @@ int main(int argc, char *argv[])
     read: do_read,
     close: do_open_or_close };
   
-  if (fusd_register("/dev/console-read", "misc", "console-read", 0666, NULL, &fops) < 0)
+  if (fusd_register("/dev/console-read", "test", "console-read", 0666, NULL, &fops) < 0)
     perror("Unable to register device");
   else {
     printf("/dev/console-read should now exist - calling fusd_run...\n");

examples/drums.c

@@ -42,7 +42,7 @@
  * directory: /dev/drums/bam, /dev/drums/bum, etc.  If you cat one of
  * these devices, it returns a string that's the same as its name.
  *
- * $Id: drums.c,v 1.4 2003/07/11 22:29:38 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -59,7 +59,7 @@
 static char *drums_strings[] = {"bam", "bum", "beat", "boom",
 				"bang", "crash", NULL};
 
-int drums_read(struct fusd_file_info *file, char *user_buffer,
+ssize_t drums_read(struct fusd_file_info *file, char *user_buffer,
 	       size_t user_length, loff_t *offset)
 {
   int len;

examples/drums2.c

@@ -47,7 +47,7 @@
  * to remember if this user has read before; cat /dev/drums/X will
  * read infinitely
  *
- * $Id: drums2.c,v 1.6 2003/07/11 22:29:38 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -82,14 +82,16 @@ int drums_open(struct fusd_file_info *file)
   /* file->device_info is what we passed to fusd_register when we
    * registered the device.  It's a pointer into the "drums" struct. */
   struct drum_info *d = (struct drum_info *) file->device_info;
+  int *user_num = calloc(1, sizeof(*user_num));
 
   /* Store this user's unique user number in their private_data */
-  file->private_data = (void *) ++(d->num_users);
+  *user_num = ++(d->num_users);
+  file->private_data = (void *) user_num; 
 
   return 0; /* return success */
 }
 
-int drums_read(struct fusd_file_info *file, char *user_buffer,
+ssize_t drums_read(struct fusd_file_info *file, char *user_buffer,
 	       size_t user_length, loff_t *offset)
 {
   struct drum_info *d = (struct drum_info *) file->device_info;
@@ -97,10 +99,11 @@ int drums_read(struct fusd_file_info *file, char *user_buffer,
   char sound[128];
 
   sprintf(sound, "You are user %d to hear a drum go '%s'!\n",
-	  (int) file->private_data, d->name);
+	  *(int *) file->private_data, d->name);
 
   len = MIN(user_length, strlen(sound));
   memcpy(user_buffer, sound, len);
+  *offset += len;
   return len;
 }
 /* EXAMPLE STOP */

examples/drums3.c

@@ -43,7 +43,7 @@
  * However, it also prints a prompt to the console, asking the user if
  * how loud the drums should be.
  *
- * $Id: drums3.c,v 1.3 2003/07/11 22:29:38 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -63,7 +63,7 @@ static char *drums_strings[] = {"bam", "bum", "beat", "boom",
 
 int volume = 2; /* default volume is 2 */
 
-int drums_read(struct fusd_file_info *file, char *user_buffer,
+ssize_t drums_read(struct fusd_file_info *file, char *user_buffer,
 	       size_t user_length, loff_t *offset)
 {
   int len;

examples/echo.c

@@ -41,7 +41,7 @@
  * stored.  Then, when you read (e.g. "cat /dev/echo"), you get back
  * whatever you wrote most recently.
  *
- * $Id: echo.c,v 1.6 2003/07/11 22:29:38 cerpa Exp $ 
+ * $Id$ 
  */
 
 #include <stdio.h>
@@ -58,7 +58,7 @@
 char *data = NULL;
 int data_length = 0;
 
-int echo_read(struct fusd_file_info *file, char *user_buffer,
+ssize_t echo_read(struct fusd_file_info *file, char *user_buffer,
 	      size_t user_length, loff_t *offset)
 {
   /* if the user has read past the end of the data, return EOF */

examples/helloworld.c

@@ -37,7 +37,7 @@
  * hello-world: Simply creates a device called /dev/hello-world, which
  * greets you when you try to get it.
  *
- * $Id: helloworld.c,v 1.11 2003/07/11 22:29:38 cerpa Exp $
+ * $Id$
  */
 
 /* EXAMPLE START helloworld.c */

examples/ioctl.c

@@ -41,7 +41,7 @@
  * the other examples, anyway), because this program is both an
  * example and part of the regression test suite.
  *
- * $Id: ioctl.c,v 1.4 2003/07/11 22:29:39 cerpa Exp $ 
+ * $Id$ 
  */
 
 #include <stdio.h>
@@ -115,8 +115,9 @@ int do_ioctl(struct fusd_file_info *file, int cmd, void *arg)
 
   case IOCTL_TEST1:
   case IOCTL_TEST2:
-    printf("ioctl server: got test1/2, arg=%d, returning it\n", (int) arg);
-    return (int) arg;
+    printf("ioctl server: got test1/2, arg=%p, *arg= %d, returning it\n", 
+	   arg, *(int *)arg);
+    return *(int *) arg;
     break;
 
 /* EXAMPLE START ioctl-server.c */
@@ -185,7 +186,8 @@ int main(int argc, char *argv[])
     /* ioctl server */
     struct fusd_file_operations f = { open: zeroreturn, close: zeroreturn,
 				      ioctl: do_ioctl};
-    if (fusd_register("ioctltest", 0666, NULL, &f) < 0)
+    if (fusd_register("/dev/ioctltest", "misc", "ioctltest", 
+		      0666, NULL, &f) < 0)
       perror("registering ioctltest");
     printf("server starting\n");
     fusd_run();
@@ -216,18 +218,24 @@ int main(int argc, char *argv[])
     CHECK(ret == 0);
 
     /* test1: issue a command with a simple (integer) argument */
-    ret = ioctl(fd, IOCTL_TEST1, TEST1_NUM);
-    CHECK(ret == TEST1_NUM);
-    CHECK(errno == 0);
-    printf("ioctl test1: got %d, errno=%d (expecting %d, errno=0)\n\n",
-	   ret, errno, TEST1_NUM);
+    {
+      int arg = TEST1_NUM;
+      ret = ioctl(fd, IOCTL_TEST1, &arg);
+      CHECK(ret == TEST1_NUM);
+      CHECK(errno == 0);
+      printf("ioctl test1: got %d, errno=%d (expecting %d, errno=0)\n\n",
+	     ret, errno, TEST1_NUM);
+    }
 
     /* test2 again: make sure errno is set properly */
-    ret = ioctl(fd, IOCTL_TEST2, -ELIBBAD);
-    CHECK(errno == ELIBBAD);
-    CHECK(ret == -1);
-    printf("ioctl test2: got %d, errno=%d (expecting -1, errno=%d)\n\n",
-	   ret, errno, ELIBBAD);
+    {
+      int arg = -ELIBBAD;
+      ret = ioctl(fd, IOCTL_TEST2, &arg);
+      CHECK(errno == ELIBBAD);
+      CHECK(ret == -1);
+      printf("ioctl test2: got %d, errno=%d (expecting -1, errno=%d)\n\n",
+	     ret, errno, ELIBBAD);
+    }
 
     printf("ioctl test3: expecting retval 0, string This Is Test3\n");
 /* EXAMPLE START ioctl-client.c */

examples/logring.c

@@ -71,7 +71,7 @@
  * but want to use it on a system that does not have FUSD, check out
  * emlog at http://www.circlemud.org/~jelson/software/emlog.
  *
- * $Id: logring.c,v 1.8 2003/07/11 22:29:39 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -340,7 +340,7 @@ void logring_complete_polldiff(struct logring_client *c)
  * may come from the kernel before the driver has returned the first
  * one; if this happens, use fusd_destroy() to get rid of the older one.
  */
-ssize_t logring_polldiff(struct fusd_file_info *file, unsigned int flags)
+int logring_polldiff(struct fusd_file_info *file, unsigned int flags)
 {
   struct logring_client *c = (struct logring_client *) file->private_data;
 

examples/pager.c

@@ -60,7 +60,7 @@
  * If you close the FD and then reopen it, there will be a race (pages
  * that arrive between the close and open will not be delivered).
  *
- * $Id: pager.c,v 1.9 2003/07/11 22:29:39 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -247,7 +247,7 @@ void pager_notify_complete_read(struct pager_client *c)
  * one; if this happens, use fusd_destroy() to get rid of the older one.
  */
 /* EXAMPLE START pager-polldiff.c */
-ssize_t pager_notify_polldiff(struct fusd_file_info *file,
+int pager_notify_polldiff(struct fusd_file_info *file,
 			      unsigned int cached_state)
 {
   struct pager_client *c = (struct pager_client *) file->private_data;

examples/uid-filter.c

@@ -42,7 +42,7 @@
  * not be read by anyone other than the driver owner (not even root!).
  * When you read from the device, it returns your PID to you.
  *
- * $Id: uid-filter.c,v 1.4 2003/07/11 22:29:39 cerpa Exp $
+ * $Id$
  */
 
 #include <stdio.h>
@@ -71,7 +71,7 @@ int do_open(struct fusd_file_info *file)
   return 0;
 }
 
-int do_read(struct fusd_file_info *file, char *user_buffer,
+ssize_t do_read(struct fusd_file_info *file, char *user_buffer,
 	    size_t user_length, loff_t *offset)
 {
   char buf[128];

include/kfusd.h

@@ -37,7 +37,7 @@
  *
  * Private header file used by the Linux Kernel Module
  *
- * $Id: kfusd.h,v 1.41 2003/07/11 22:29:39 cerpa Exp $
+ * $Id$
  */
 
 #ifndef __KFUSD_H__
@@ -121,16 +121,15 @@ struct fusd_dev_t_s {
   struct task_struct* task;
   
   char *name;			/* Name of the device under devfs (/dev) */
-	char *class_name;
-	char *dev_name;
-	struct CLASS *clazz;
-	int owns_class;
-	struct class_device *class_device;
-	
+  char *class_name;
+  char *dev_name;
+  struct CLASS *clazz;
+  int owns_class;
+  struct class_device *class_device;
+  
   void *private_data;		/* User's private data */
-	struct cdev* handle;
-	dev_t dev_id;
-//  devfs_handle_t handle;	/* The devfs-provided handle */
+  struct cdev* handle;
+  dev_t dev_id;
 
   fusd_file_t **files;		/* Array of this device's open files */
   int array_size;		/* Size of the array pointed to by 'files' */

kfusd/kfusd.c

@@ -37,8 +37,9 @@
  * Jeremy Elson  <jelson@circlemud.org>
  * Copyright (c) 2001, Sensoria Corporation
  * Copyright (c) 2002-2003, Regents of the University of California
+ * Copyright (c) 2007 Monty and Xiph.Org
  *
- * $Id: kfusd.c,v 1.97 2003/07/11 22:29:39 cerpa Exp $
+ * $Id$
  */
 
 /*
@@ -90,7 +91,7 @@
 /* Default debug level for FUSD messages.  Has no effect unless
  * CONFIG_FUSD_DEBUG is defined. */
 #ifndef CONFIG_FUSD_DEBUGLEVEL
-#define CONFIG_FUSD_DEBUGLEVEL 2
+#define CONFIG_FUSD_DEBUGLEVEL 3
 #endif
 
 /* Define this to check for memory leaks */
@@ -103,11 +104,6 @@
  * __wake_up. */
 /* #define CONFIG_FUSD_USE_WAKEUPSYNC */
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,9)
-# define vsnprintf(str, size, format, ap) vsprintf(str, format, ap)
-# define  snprintf(str, len, args...)      sprintf(str, args)
-#endif
-
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13)
 
 #define CLASS class_simple
@@ -132,14 +128,25 @@
 
 #endif
 
+static inline struct kobject * to_kobj(struct dentry * dentry)
+{
+  struct sysfs_dirent * sd = dentry->d_fsdata;
+  if(sd)
+    return ((struct kobject *) sd->s_element);
+  else
+    return NULL;
+}
+
+#define to_class(obj) container_of(obj, struct class, subsys.kset.kobj)
+
 /**************************************************************************/
 
 #include "fusd.h"
 #include "fusd_msg.h"
 #include "kfusd.h"
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
-# error "***FUSD doesn't work before Linux Kernel v2.4.0"
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13)
+# error "***FUSD doesn't work before Linux Kernel v2.6.13"
 #endif
 
 STATIC struct cdev* fusd_control_device;
@@ -181,6 +188,10 @@ STATIC int fusd_debug_level = CONFIG_FUSD_DEBUGLEVEL;
 module_param(fusd_debug_level, int, S_IRUGO);
 
 #define BUFSIZE 1000 /* kernel's kmalloc pool has a 1012-sized bucket */
+static int debug_throttle = 0; /* emit a maximum number of debug
+				  messages, else it's possible to take
+				  out the machine accidentally if a
+				  daemon disappears with open files */
 
 STATIC void rdebug_real(char *fmt, ...)
 {
@@ -188,6 +199,9 @@ STATIC void rdebug_real(char *fmt, ...)
   int len;
   char *message;
 
+  if(debug_throttle > 100) return;
+  debug_throttle++;
+
   /* I'm kmallocing since you don't really want 1k on the stack. I've
    * had stack overflow problems before; the kernel stack is quite
    * small... */
@@ -634,8 +648,8 @@ STATIC struct fusd_transaction* fusd_find_incomplete_transaction(fusd_file_t *fu
 
   if (transaction->subcmd != subcmd)
   {
-    RDEBUG(2, "Incomplete transaction %ld thrown out, was expecting subcmd %d but received %d", 
-           transaction->transid, transaction->subcmd, subcmd);
+      RDEBUG(2, "Incomplete transaction %ld thrown out, was expecting subcmd %d but received %d", 
+	     transaction->transid, transaction->subcmd, subcmd);
     fusd_cleanup_transaction(fusd_file, transaction);
     return NULL;
   }
@@ -1164,7 +1178,7 @@ STATIC int fusd_client_release(struct inode *inode, struct file *file)
   if (retval >= 0)
     retval = fusd_fops_call_wait(fusd_file, NULL, transaction);
 	
-	RDEBUG(5, "fusd_client_release: call_wait %d", retval);
+  RDEBUG(5, "fusd_client_release: call_wait %d", retval);
   /* delete the file off the device's file-list, and free it.  note
    * that device may be a zombie right now and may be freed when we
    * come back from free_fusd_file.  we only release the lock if the
@@ -1195,6 +1209,10 @@ STATIC ssize_t fusd_client_read(struct file *file , char *buf,
   int retval = -EPIPE;
 
   GET_FUSD_FILE_AND_DEV(file->private_data, fusd_file, fusd_dev);
+
+  if(ZOMBIE(fusd_dev))
+    goto zombie_dev;
+
   LOCK_FUSD_FILE(fusd_file);
 
   RDEBUG(3, "got a read on /dev/%s (owned by pid %d) from pid %d",
@@ -1203,7 +1221,7 @@ STATIC ssize_t fusd_client_read(struct file *file , char *buf,
   transaction = fusd_find_incomplete_transaction(fusd_file, FUSD_READ);
   if (transaction && transaction->size > count)
   {
-    RDEBUG(3, "Incomplete I/O transaction %ld thrown out, as the transaction's size of %d bytes was greater than "
+    RDEBUG(2, "Incomplete I/O transaction %ld thrown out, as the transaction's size of %d bytes was greater than "
               "the retry's size of %d bytes", transaction->transid, transaction->size, (int)count);
 
     fusd_cleanup_transaction(fusd_file, transaction);
@@ -1273,6 +1291,7 @@ STATIC ssize_t fusd_client_read(struct file *file , char *buf,
 
  invalid_file:
  invalid_dev:
+ zombie_dev:
   RDEBUG(3, "got a read on client file from pid %d, driver has disappeared",
 	 current->pid);
   return -EPIPE;
@@ -1362,13 +1381,17 @@ STATIC ssize_t fusd_client_write(struct file *file,
   struct fusd_transaction* transaction;
   
   GET_FUSD_FILE_AND_DEV(file->private_data, fusd_file, fusd_dev);
+
+  if(ZOMBIE(fusd_dev))
+    goto zombie_dev;
+
   LOCK_FUSD_FILE(fusd_file);
 
   RDEBUG(3, "got a write on /dev/%s (owned by pid %d) from pid %d",
 	 NAME(fusd_dev), fusd_dev->pid, current->pid);
 
   transaction = fusd_find_incomplete_transaction(fusd_file, FUSD_WRITE);
-  if (transaction && transaction->size == length)
+  if (transaction && transaction->size != length)
   {
     RDEBUG(2, "Incomplete I/O transaction %ld thrown out, as the transaction's size of %d bytes was not equal to "
               "the retry's size of %d bytes", transaction->transid, transaction->size, (int) length);
@@ -1437,7 +1460,8 @@ STATIC ssize_t fusd_client_write(struct file *file,
 
  invalid_file:
  invalid_dev:
-  RDEBUG(3, "got a read on client file from pid %d, driver has disappeared",
+ zombie_dev:
+  RDEBUG(3, "got a write on client file from pid %d, driver has disappeared",
 	 current->pid);
   return -EPIPE;
 }
@@ -1453,6 +1477,10 @@ STATIC int fusd_client_ioctl(struct inode *inode, struct file *file,
   struct fusd_transaction* transaction;
   
   GET_FUSD_FILE_AND_DEV(file->private_data, fusd_file, fusd_dev);
+
+  if(ZOMBIE(fusd_dev))
+    goto zombie_dev;
+
   LOCK_FUSD_FILE(fusd_file);
 
   RDEBUG(3, "got an ioctl on /dev/%s (owned by pid %d) from pid %d",
@@ -1527,7 +1555,8 @@ STATIC int fusd_client_ioctl(struct inode *inode, struct file *file,
 
  invalid_file:
  invalid_dev:
-  RDEBUG(3, "got a read on client file from pid %d, driver has disappeared",
+ zombie_dev:
+  RDEBUG(3, "got an ioctl on client file from pid %d, driver has disappeared",
 	 current->pid);
   return -EPIPE;
 }
@@ -1576,6 +1605,10 @@ static int fusd_client_mmap(struct file *file, struct vm_area_struct * vma)
   struct fusd_mmap_instance* mmap_instance;
 
   GET_FUSD_FILE_AND_DEV(file->private_data, fusd_file, fusd_dev);
+
+  if(ZOMBIE(fusd_dev))
+    goto zombie_dev;
+
   LOCK_FUSD_FILE(fusd_file);
 
   RDEBUG(3, "got a mmap on /dev/%s (owned by pid %d) from pid %d",
@@ -1626,6 +1659,7 @@ static int fusd_client_mmap(struct file *file, struct vm_area_struct * vma)
 
  invalid_file:
  invalid_dev:
+ zombie_dev:
   RDEBUG(3, "got a mmap on client file from pid %d, driver has disappeared",
 	 current->pid);
   return -EPIPE;
@@ -1886,6 +1920,11 @@ STATIC int fusd_polldiff_reply(fusd_dev_t *fusd_dev, fusd_msg_t *msg)
   return 0;
 }
 
+STATIC int systest (struct super_block *sb,void *data){
+  return 1;
+
+}
+
 STATIC int fusd_register_device(fusd_dev_t *fusd_dev,
 				register_msg_t register_msg)
 {
@@ -1899,10 +1938,6 @@ STATIC int fusd_register_device(fusd_dev_t *fusd_dev,
     return -EINVAL;
   }
 
-  /* user can only register one device per instance */
-//  if (fusd_dev->handle != 0)
-//    return -EBUSY;
-
   register_msg.name[FUSD_MAX_NAME_LENGTH] = '\0';
 
   /* make sure that there isn't already a device by this name */
@@ -1936,83 +1971,143 @@ STATIC int fusd_register_device(fusd_dev_t *fusd_dev,
      return -ENOMEM;
   }
 	
-	strcpy(fusd_dev->class_name, register_msg.clazz);
+  strcpy(fusd_dev->class_name, register_msg.clazz);
 	
   /* allocate memory for the class name, and copy */
   if ((fusd_dev->dev_name = KMALLOC(strlen(register_msg.devname)+1, GFP_KERNEL)) == NULL) {
      RDEBUG(1, "yikes!  kernel can't allocate memory");
      return -ENOMEM;
   }
-	
-	strcpy(fusd_dev->dev_name, register_msg.devname);
+  
+  strcpy(fusd_dev->dev_name, register_msg.devname);
+  
+  dev_id = 0;
+  
+  if((error = alloc_chrdev_region(&dev_id, 0, 1, fusd_dev->name)) < 0)
+    {
+      printk(KERN_ERR "alloc_chrdev_region failed status: %d\n", error);
+      goto register_failed;
+    }
+  
+  fusd_dev->dev_id = dev_id;
+  
+  fusd_dev->handle = cdev_alloc();
+  if(fusd_dev->handle == NULL)
+    {
+      printk(KERN_ERR "cdev_alloc() failed\n");
+      error = -ENOMEM;
+      goto register_failed3;
+    }
+  
+  fusd_dev->handle->owner = THIS_MODULE;
+  fusd_dev->handle->ops = &fusd_client_fops;
+  
+  kobject_set_name(&fusd_dev->handle->kobj, fusd_dev->name);
+  
+  if((error = cdev_add(fusd_dev->handle, dev_id, 1)) < 0)
+    {
+      printk(KERN_ERR "cdev_add failed status: %d\n", error);
+      kobject_put(&fusd_dev->handle->kobj);
+      goto register_failed3;
+    }
 
-	dev_id = 0;
+  /* look up class in sysfs */
 
-	if((error = alloc_chrdev_region(&dev_id, 0, 1, fusd_dev->name)) < 0)
-	{
-		printk(KERN_ERR "alloc_chrdev_region failed status: %d\n", error);
-		goto register_failed;
+  {
+    struct CLASS *sys_class = NULL;
+    struct file_system_type *sysfs = get_fs_type("sysfs");
+    struct dentry *classdir = NULL;
+    struct dentry *classdir2 = NULL;
+    struct super_block *sb = NULL;
+ 
+    if(sysfs){      
+      sb = sget (sysfs, systest, NULL,NULL);
+      
+      /* because put_filesystem isn't exported */
+      module_put(sysfs->owner);
+
+      if(sb){
+	struct dentry *root = sb->s_root;
+
+	if(root){
+	  struct qstr name;
+
+	  name.name = "class";
+	  name.len = 5;
+	  name.hash = full_name_hash(name.name, name.len);
+	  classdir = d_lookup(root, &name);
+	      
+	  if(classdir){
+	    name.name = register_msg.clazz;
+	    name.len = strlen(name.name);
+	    name.hash = full_name_hash(name.name, name.len);
+	    classdir2 = d_lookup(classdir, &name);
+	    
+	    if(classdir2){
+	      // jackpot.  extract the class.
+	      struct kobject *ko = to_kobj(classdir2);
+	      sys_class = (ko?to_class(ko):NULL);
+
+	      if(!sys_class)
+		RDEBUG(2, "WARNING: sysfs entry for %s has no kobject!\n",register_msg.clazz);
+	    }
+	  }else{
+	    RDEBUG(2, "WARNING: sysfs does not list a class directory!\n");
+	  }
+	}else{
+	  RDEBUG(2, "WARNING: unable to access root firectory in sysfs!\n");
 	}
-
-	fusd_dev->dev_id = dev_id;
-
-	fusd_dev->handle = cdev_alloc();
-	if(fusd_dev->handle == NULL)
+      }else{
+	RDEBUG(2, "WARNING: unable to access superblock for sysfs!\n");
+      }
+    }else{
+      RDEBUG(2, "WARNING: sysfs not mounted or unavailable!\n");
+    }
+    
+    if(sys_class){
+      RDEBUG(3, "Found entry for class '%s' in sysfs\n",register_msg.clazz);
+      fusd_dev->clazz = sys_class;
+      fusd_dev->owns_class = 0;
+    }else{
+      RDEBUG(3, "Sysfs has no entry for '%s'; registering new class\n",register_msg.clazz);
+      fusd_dev->clazz = class_create(THIS_MODULE, fusd_dev->class_name);
+      if(IS_ERR(fusd_dev->clazz))
 	{
-		printk(KERN_ERR "cdev_alloc() failed\n");
-		error = -ENOMEM;
-		goto register_failed3;
+	  error = PTR_ERR(fusd_dev->clazz);
+	  printk(KERN_ERR "class_create failed status: %d\n", error);
+	  goto register_failed4;
 	}
+      fusd_dev->owns_class = 1;
+    }
 
-	fusd_dev->handle->owner = THIS_MODULE;
-	fusd_dev->handle->ops = &fusd_client_fops;
-
-	kobject_set_name(&fusd_dev->handle->kobj, fusd_dev->name);
-
-	if((error = cdev_add(fusd_dev->handle, dev_id, 1)) < 0)
-	{
-		printk(KERN_ERR "cdev_add failed status: %d\n", error);
-		kobject_put(&fusd_dev->handle->kobj);
-		goto register_failed3;
-	}
-
-	// Hack to add my class to the sound class
-	if(strcmp("sound", register_msg.clazz) == 0)
-	{
-		fusd_dev->clazz = sound_class;
-		fusd_dev->owns_class = 0;
-	}
-	else
-	{
-		fusd_dev->clazz = class_create(THIS_MODULE, fusd_dev->class_name);
-		if(IS_ERR(fusd_dev->clazz))
-		{
-			error = PTR_ERR(fusd_dev->clazz);
-			printk(KERN_ERR "class_create failed status: %d\n", error);
-			goto register_failed4;
-		}
-		fusd_dev->owns_class = 1;
-	}
-	
-	fusd_dev->class_device = CLASS_DEVICE_CREATE(fusd_dev->clazz, NULL, fusd_dev->dev_id, NULL, fusd_dev->dev_name);
-	if(fusd_dev->class_device == NULL)
-	{
-		error = PTR_ERR(fusd_dev->class_device);
-		printk(KERN_ERR "class_device_create failed status: %d\n", error);
-		goto register_failed5;
-	}
-	
-	/* make sure the registration was successful */
-  /*
+    if(classdir)
+      dput(classdir);
+    if(classdir2)
+      dput(classdir2);
+    
+    if(sb){
+      up_write(&sb->s_umount);
+      deactivate_super(sb);
+    }
+  }
+  
+  fusd_dev->class_device = CLASS_DEVICE_CREATE(fusd_dev->clazz, NULL, fusd_dev->dev_id, NULL, fusd_dev->dev_name);
+  if(fusd_dev->class_device == NULL)
+    {
+      error = PTR_ERR(fusd_dev->class_device);
+      printk(KERN_ERR "class_device_create failed status: %d\n", error);
+      goto register_failed5;
+    }
+  
+  /* make sure the registration was successful */
   if (fusd_dev->handle == 0) {
     error = -EIO;
     goto register_failed;
   }
-  */
-
+  
   /* remember the user's private data so we can pass it back later */
   fusd_dev->private_data = register_msg.device_info;
-
+  
   /* everything ok */
   fusd_dev->version = atomic_inc_and_ret(&last_version);
   RDEBUG(3, "pid %d registered /dev/%s v%ld", fusd_dev->pid, NAME(fusd_dev),
@@ -2111,16 +2206,15 @@ STATIC int fusd_release(struct inode *inode, struct file *file)
   }
 #endif
 
-  if(fusd_dev->handle)
-	{
-		class_device_destroy(fusd_dev->clazz, fusd_dev->dev_id);
-		if(fusd_dev->owns_class)
-		{
-			class_destroy(fusd_dev->clazz);
-		}
-		cdev_del(fusd_dev->handle);
-		unregister_chrdev_region(fusd_dev->dev_id, 1);
-	}
+  if(fusd_dev->handle){
+    class_device_destroy(fusd_dev->clazz, fusd_dev->dev_id);
+    if(fusd_dev->owns_class)
+      {
+	class_destroy(fusd_dev->clazz);
+      }
+    cdev_del(fusd_dev->handle);
+    unregister_chrdev_region(fusd_dev->dev_id, 1);
+  }
 
   /* mark the driver as being gone */
   zombify_dev(fusd_dev);
@@ -2654,7 +2748,7 @@ STATIC void fusd_status_build_text(fusd_statcontext_t *fs)
   }
 
   len += snprintf(buf + len, buf_size - len,
-		  "\nFUSD $Revision: 1.97-kor-hacked-11 $ - %d devices used by %d clients\n",
+		  "\nFUSD $Revision$ - %d devices used by %d clients\n",
 		  total_files, total_clients);
 
  out:
@@ -2803,7 +2897,7 @@ STATIC int init_fusd(void)
 
 
   printk(KERN_INFO
-	 "fusd: starting, $Revision: 1.97-kor-hacked-11 $, $Date: 2003/07/11 22:29:39 $");
+	 "fusd: starting, $Revision$, $Date$");
 #ifdef CVSTAG
   printk(", release %s", CVSTAG);
 #endif

libfusd/libfusd.c

@@ -35,10 +35,10 @@
  *
  * authors: jelson and girod
  *
- * $Id: libfusd.c,v 1.61 2003/07/11 22:29:39 cerpa Exp $
+ * $Id$
  */
 
-char libfusd_c_id[] = "$Id: libfusd.c,v 1.61 2003/07/11 22:29:39 cerpa Exp $";
+char libfusd_c_id[] = "$Id$";
 
 #include <stdio.h>
 #include <stdlib.h>

make.include

@@ -1,149 +0,0 @@
-
-# auto-dependency generation makefile
-
-
-#### Default values
-
-SRCEXTENSIONS := c C cpp
-CC := gcc
-CPP := g++
-LD := ld
-AR := ar
-
-#### build object directory token 
-
-CPU := $(shell uname -m)
-OS := $(shell uname -s | tr '[A-Z]' '[a-z]')
-
-DEFAULT_ARCH := $(CPU)-$(OS)
-
-ifeq ($(strip $(ARCH)),)
-	ARCH := $(DEFAULT_ARCH)
-endif
-
-OBJTOKEN := obj.$(ARCH)
-
-#
-#  Under most circumstances, paths are simple
-#
-
-ifeq ($(POSTROOT),..)
-	MODPATH := .
-	OBJDIR := $(OBJTOKEN)
-else
-	MODPATH := $(POSTROOT)/$(MODULENAME)
-	OBJDIR := $(MODPATH)/$(OBJTOKEN)
-endif
-
-
-#
-# Directories
-#
-
-MODLIBS := \
-	-L$(OBJDIR) \
-	$(foreach dir, $(MODULES), -L$(POSTROOT)/$(dir)/$(OBJTOKEN))
-MODINCLUDES := \
-	-I$(MODPATH)/include \
-	$(foreach dir, $(MODULES), -I$(POSTROOT)/$(dir)/include)
-ALLTARGETS := \
-	$(foreach targ, $(TARGETS), $(OBJDIR)/$(targ))
-VPATH := \
-	$(MODPATH)/include \
-	$(foreach dir, $(SRCDIRS), $(MODPATH)/$(dir)) \
-	$(foreach dir, $(MODULES), $(POSTROOT)/$(dir)/include)
-
-
-#### include paths
-
-LIBPATH := $(MODLIBS)
-INCLUDEPATH += -I. -Iinclude $(MODINCLUDES)
-KCFLAGS = -O2 \
- -Wall -Werror -Wstrict-prototypes \
- -fno-strict-aliasing -fomit-frame-pointer \
- -DMODULE -D__KERNEL__ 
-
-CFLAGS :=  -fPIC -Wall -O2 -g
-CCFLAGS := -Werror
-CPPFLAGS := -ftemplate-depth-30
-
-#### Architecture deps
-
-KERNEL_INCLUDE := $(KERNEL_HOME)/include
-BINSTRIP := strip
-
-KCFLAGS += $(INCLUDEPATH)
-CFLAGS += $(INCLUDEPATH) $(LIBPATH)
-
-CCFLAGS += $(CFLAGS)
-CPPFLAGS += $(CFLAGS)
-
-#
-#  targets
-# 
-
-default:	$(ALLTARGETS)
-
-####################################################
-
-
-#
-#  Dependency generation
-#
-
-
-# Get list of all source files
-SOURCES := \
-	$(notdir $(wildcard \
-		$(foreach dir, $(SRCDIRS), \
-			$(foreach ext, $(SRCEXTENSIONS), $(dir)/*.$(ext)))))
-
-# Convert all .c, .cpp, .C to .d
-SRC_AND_DEPENDS := $(foreach ext, $(SRCEXTENSIONS),\
-	$(patsubst %.$(ext),%.d,$(SOURCES)))
-
-DEPENDS := $(foreach file, $(filter %.d,$(SRC_AND_DEPENDS)), $(OBJDIR)/$(file))
-
-
-
-BASE = $(subst /,\/,$*)
-ODIR = $(subst /,\/,$(OBJDIR))
-
-# This magic is from the 'make' manual (with mods by jelson)
-$(OBJDIR)/%.d: %.c 
-	@mkdir -p $(OBJDIR)
-	set -e; $(CC) -MM -I$(KERNEL_INCLUDE) $(CFLAGS) $< \
-	| sed 's/\($(BASE)\)\.o[ :]*/$(ODIR)\/$(BASE).o $(ODIR)\/$(BASE).d : /g' > $@; \
-	[ -s $@ ] || rm -f $@
-
-$(OBJDIR)/%.d: %.C 
-	@mkdir -p $(OBJDIR)
-	set -e; $(CC) -MM $(CPPFLAGS) $< \
-	| sed 's/\($(BASE)\)\.o[ :]*/$(ODIR)\/$(BASE).o $(ODIR)\/$(BASE).d : /g' > $@; \
-	[ -s $@ ] || rm -f $@
-
-$(OBJDIR)/%.d: %.cpp 
-	@mkdir -p $(OBJDIR)
-	set -e; $(CC) -MM $(CPPFLAGS) $< \
-	| sed 's/\($(BASE)\)\.o[ :]*/$(ODIR)\/$(BASE).o $(ODIR)\/$(BASE).d : /g' > $@; \
-	[ -s $@ ] || rm -f $@
-
-
-#
-# Rules
-#
-
-$(OBJDIR)/%.o: %.cpp
-	$(CPP) $(CPPFLAGS) $< -c -o $@
-
-$(OBJDIR)/%.o: %.C
-	$(CPP) $(CPPFLAGS) $< -c -o $@
-
-$(OBJDIR)/%.o: %.c
-	$(CC) $(CCFLAGS) $< -c -o $@
-
-clean:
-	rm -f $(ALLTARGETS) $(OBJDIR)/*.[oa] $(OBJDIR)/*.so.* $(DEPENDS)
-
-
-include $(DEPENDS)