* include/sys/sunddi.h, modules/spl/spl-module.c : Removed default

udev support from sunddi implementation because it uses GPL-only
symbols.  This support is optionally available for SPL consumers
if they define HAVE_GPL_ONLY_SYMBOLS and license their module as
GPL using the MODULE_LICENSE("GPL") macro.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@179 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c

5 files changed, 83 insertions, 47 deletions

diff --git a/ChangeLog b/ChangeLog
index cb231cb01..8d023992e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2008-11-13 Brian Behlendorf <[email protected]>
+
+	* include/sys/sunddi.h, modules/spl/spl-module.c : Removed default
+	udev support from sunddi implementation because it uses GPL-only
+	symbols.  This support is optionally available for SPL consumers
+	if they define HAVE_GPL_ONLY_SYMBOLS and license their module as
+	GPL using the MODULE_LICENSE("GPL") macro.
+
 2008-11-05 Brian Behlendorf <[email protected]>
 
 	* : Tag spl-0.3.4
diff --git a/autoconf/spl-build.m4 b/autoconf/spl-build.m4
index 0ac7ae8a6..c5c031977 100644
--- a/autoconf/spl-build.m4
+++ b/autoconf/spl-build.m4
@@ -30,7 +30,7 @@ AC_DEFUN([SPL_AC_KERNEL], [
 			AC_MSG_RESULT([Not found])
 			AC_MSG_ERROR([
 			*** Please specify the location of the kernel source
-			*** with the '--with-kernel=PATH' option])
+			*** with the '--with-linux=PATH' option])
 		fi
 	fi
 
@@ -74,6 +74,12 @@ AC_DEFUN([SPL_AC_KERNEL], [
 	AC_SUBST(kmoduledir)
 ])
 
+AC_DEFUN([SPL_AC_LICENSE], [
+        AC_MSG_CHECKING([license])
+        AC_MSG_RESULT([GPL])
+	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
+])
+
 AC_DEFUN([SPL_AC_DEBUG], [
 	AC_MSG_CHECKING([whether debugging is enabled])
 	AC_ARG_ENABLE( [debug],
diff --git a/configure.ac b/configure.ac
index a50fe92e1..b3835d0e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,6 +38,7 @@ LINUX=
 LINUX_OBJ=
 
 SPL_AC_KERNEL
+SPL_AC_LICENSE
 SPL_AC_DEBUG
 SPL_AC_DEBUG_KMEM
 SPL_AC_DEBUG_MUTEX
diff --git a/include/sys/sunddi.h b/include/sys/sunddi.h
index bbfd412da..dea09d171 100644
--- a/include/sys/sunddi.h
+++ b/include/sys/sunddi.h
@@ -87,6 +87,7 @@ typedef struct dev_info {
 	minor_t di_minor;
 	dev_t di_dev;
 	unsigned di_minors;
+	int di_flags;
 	struct list_head di_list;
 } dev_info_t;
 
@@ -180,6 +181,11 @@ typedef struct modldrv {
 #define	DDI_PROP_DONTPASS		0x0001
 #define	DDI_PROP_CANSLEEP		0x0002
 
+#define	GLOBAL_DEV			0x02
+#define	NODEBOUND_DEV			0x04
+#define	NODESPECIFIC_DEV		0x06
+#define	ENUMERATED_DEV			0x08
+
 #define ddi_prop_lookup_string(x1,x2,x3,x4,x5)	(*x5 = NULL)
 #define ddi_prop_free(x)			(void)0
 #define ddi_root_node()				(void)0
@@ -189,7 +195,7 @@ typedef struct modldrv {
 
 extern int __ddi_create_minor_node(dev_info_t *dip, char *name, int spec_type,
                                    minor_t minor_num, char *node_type,
-				   int flag, struct module *mod);
+				   int flags, struct module *mod);
 extern void __ddi_remove_minor_node(dev_info_t *dip, char *name);
 extern int __mod_install(struct modlinkage *modlp);
 extern int __mod_remove(struct modlinkage *modlp);
@@ -197,19 +203,64 @@ extern int __mod_remove(struct modlinkage *modlp);
 static __inline__ void ddi_report_dev(dev_info_t *d) { }
 static __inline__ void ddi_prop_remove_all(dev_info_t *dip) { }
 
+static __inline__ void
+ddi_remove_minor_node(dev_info_t *di, char *name)
+{
+#ifdef HAVE_GPL_ONLY_SYMBOLS
+	/* Cleanup udev (GPL-only symbols required).  This is performed as
+	 * part of an inline function to ensure that these symbols are not
+	 * linked against the SPL which is GPL'ed.  But instead they are
+	 * linked against the package building against the SPL to ensure
+	 * its license allows linking with GPL-only symbols. */
+	if (di->di_class) {
+		spl_device_destroy(di->di_class, di->di_device, di->di_dev);
+		spl_class_destroy(di->di_class);
+		di->di_class = NULL;
+		di->di_dev = 0;
+	}
+#endif
+
+	__ddi_remove_minor_node(di, name);
+}
+
 static __inline__ int
 ddi_create_minor_node(dev_info_t *di, char *name, int spec_type,
-                      minor_t minor_num, char *node_type, int flag)
+                      minor_t minor_num, char *node_type, int flags)
 {
-	return __ddi_create_minor_node(di, name, spec_type, minor_num,
-	                               node_type, flag, THIS_MODULE);
-
+	int rc;
+
+	rc = __ddi_create_minor_node(di, name, spec_type, minor_num,
+	                             node_type, flags, THIS_MODULE);
+	if (rc)
+		return rc;
+
+#ifdef HAVE_GPL_ONLY_SYMBOLS
+	/* Setup udev (GPL-only symbols required).  This is performed as
+	 * part of an inline function to ensure that these symbols are not
+	 * linked against the SPL which is GPL'ed.  But instead they are
+	 * linked against the package building against the SPL to ensure
+	 * its license allows linking with GPL-only symbols. */
+	di->di_class = spl_class_create(THIS_MODULE, name);
+	if (IS_ERR(di->di_class)) {
+		rc = PTR_ERR(di->di_class);
+		di->di_class = NULL;
+		ddi_remove_minor_node(di, name);
+		CERROR("Error creating %s class, %d\n", name, rc);
+		RETURN(DDI_FAILURE);
+	}
+
+	/* Do not append a 0 to devices with minor nums of 0 */
+	di->di_device = spl_device_create(di->di_class, NULL, di->di_dev, NULL,
+					  (di->di_minor == 0) ? "%s" : "%s%d",
+					  name, di->di_minor);
+#endif
+
+	return rc;
 }
 
 #undef mod_install
 #undef mod_remove
 
-#define ddi_remove_minor_node		__ddi_remove_minor_node
 #define mod_install			__mod_install
 #define mod_remove			__mod_remove
 
diff --git a/modules/spl/spl-module.c b/modules/spl/spl-module.c
index 0dd4cfded..700c76182 100644
--- a/modules/spl/spl-module.c
+++ b/modules/spl/spl-module.c
@@ -58,7 +58,7 @@ mod_generic_ioctl(struct inode *ino, struct file *filp,
 		  unsigned int cmd, unsigned long arg)
 {
 	struct dev_info *di;
-	int rc, flag = 0, rvalp = 0;
+	int rc, flags = 0, rvalp = 0;
 	cred_t *cr = NULL;
 
 	di = get_dev_info(MKDEV(imajor(ino), iminor(ino)));
@@ -67,14 +67,14 @@ mod_generic_ioctl(struct inode *ino, struct file *filp,
 
 	rc = di->di_ops->devo_cb_ops->cb_ioctl(di->di_dev,
 	                                       (int)cmd,(intptr_t)arg,
-	                                       flag, cr, &rvalp);
+	                                       flags, cr, &rvalp);
 	return rc;
 }
 
 int
 __ddi_create_minor_node(dev_info_t *di, char *name, int spec_type,
                         minor_t minor_num, char *node_type,
-		        int flag, struct module *mod)
+		        int flags, struct module *mod)
 {
 	struct cdev *cdev;
 	struct dev_ops *dev_ops;
@@ -86,7 +86,6 @@ __ddi_create_minor_node(dev_info_t *di, char *name, int spec_type,
 	ASSERT(spec_type == S_IFCHR);
 	ASSERT(minor_num < di->di_minors);
 	ASSERT(!strcmp(node_type, DDI_PSEUDO));
-	ASSERT(flag == 0);
 
 	fops = kzalloc(sizeof(struct file_operations), GFP_KERNEL);
 	if (fops == NULL)
@@ -141,8 +140,10 @@ __ddi_create_minor_node(dev_info_t *di, char *name, int spec_type,
 	ASSERT(cb_ops->cb_aread == NULL);
 	ASSERT(cb_ops->cb_awrite == NULL);
 
+	di->di_cdev  = cdev;
+	di->di_flags = flags;
 	di->di_minor = minor_num;
-	di->di_dev = MKDEV(di->di_major, di->di_minor);
+	di->di_dev   = MKDEV(di->di_major, di->di_minor);
 
 	rc = cdev_add(cdev, di->di_dev, 1);
 	if (rc) {
@@ -153,29 +154,6 @@ __ddi_create_minor_node(dev_info_t *di, char *name, int spec_type,
 		RETURN(DDI_FAILURE);
 	}
 
-	di->di_class = spl_class_create(THIS_MODULE, name);
-	if (IS_ERR(di->di_class)) {
-                rc = PTR_ERR(di->di_class);
-                CERROR("Error creating %s class, %d\n", name, rc);
-		kfree(fops);
-                cdev_del(di->di_cdev);
-		mutex_exit(&di->di_lock);
-		RETURN(DDI_FAILURE);
-	}
-
-	/* Do not append a 0 to devices with minor nums of 0 */
-	if (di->di_minor == 0) {
-	        di->di_device = spl_device_create(di->di_class, NULL,
-						  di->di_dev, NULL,
-						  "%s", name);
-	} else {
-	        di->di_device = spl_device_create(di->di_class, NULL,
-						  di->di_dev, NULL,
-						  "%s%d", name, di->di_minor);
-	}
-
-	di->di_cdev = cdev;
-
 	spin_lock(&dev_info_lock);
 	list_add(&di->di_list, &dev_info_list);
 	spin_unlock(&dev_info_lock);
@@ -184,19 +162,11 @@ __ddi_create_minor_node(dev_info_t *di, char *name, int spec_type,
 
 	RETURN(DDI_SUCCESS);
 }
-EXPORT_SYMBOL_GPL(__ddi_create_minor_node);
+EXPORT_SYMBOL(__ddi_create_minor_node);
 
 static void
 __ddi_remove_minor_node_locked(dev_info_t *di, char *name)
 {
-	if (di->di_class) {
-		spl_device_destroy(di->di_class, di->di_device, di->di_dev);
-		spl_class_destroy(di->di_class);
-
-		di->di_class = NULL;
-		di->di_dev = 0;
-	}
-
 	if (di->di_cdev) {
 		cdev_del(di->di_cdev);
 		di->di_cdev = NULL;
@@ -216,19 +186,19 @@ __ddi_remove_minor_node(dev_info_t *di, char *name)
 	mutex_exit(&di->di_lock);
 	EXIT;
 }
-EXPORT_SYMBOL_GPL(ddi_remove_minor_node);
+EXPORT_SYMBOL(__ddi_remove_minor_node);
 
 #if 0
 static int
 mod_generic_open(struct inode *, struct file *)
 {
-	open(dev_t *devp, int flag, int otyp, cred_t *credp);
+	open(dev_t *devp, int flags, int otyp, cred_t *credp);
 }
 
 static int
 mod_generic_close(struct inode *, struct file *)
 {
-	close(dev_t dev, int flag, int otyp, cred_t *credp);
+	close(dev_t dev, int flags, int otyp, cred_t *credp);
 }
 
 static ssize_t