udev-115: Kernel events filtering improvement.

In order to avoid creating dozens of ttys and ptys, we have to discard 
some specific kernel events.


git-svn-id: https://svn.o-hand.com/repos/poky/trunk@2820 311d38ba-8fff-0310-9ca6-ca027cbcb966

2 files changed, 105 insertions, 0 deletions

diff --git a/meta/packages/udev/udev-115/udevtrigger_add_devname_filtering.patch b/meta/packages/udev/udev-115/udevtrigger_add_devname_filtering.patch
new file mode 100644
index 0000000000..87cafcaa9d
--- /dev/null
+++ b/meta/packages/udev/udev-115/udevtrigger_add_devname_filtering.patch
@@ -0,0 +1,104 @@
+---
+ udevtrigger.c |   40 ++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 40 insertions(+)
+
+Index: udev-115/udevtrigger.c
+===================================================================
+--- udev-115.orig/udevtrigger.c 2007-08-24 01:29:54.000000000 +0200
++++ udev-115/udevtrigger.c      2007-09-21 18:45:28.000000000 +0200
+@@ -39,6 +39,8 @@
+ LIST_HEAD(device_list);
+ LIST_HEAD(filter_subsystem_match_list);
+ LIST_HEAD(filter_subsystem_nomatch_list);
++LIST_HEAD(filter_kernel_match_list);
++LIST_HEAD(filter_kernel_nomatch_list);
+ LIST_HEAD(filter_attr_match_list);
+ LIST_HEAD(filter_attr_nomatch_list);
+ 
+@@ -218,6 +220,26 @@
+        return 0;
+ }
+ 
++static int kernel_filtered(const char *kernel)
++{
++       struct name_entry *loop_name;
++
++       /* skip devices matching the prohibited kernel device names */
++       list_for_each_entry(loop_name, &filter_kernel_nomatch_list, node)
++               if (fnmatch(loop_name->name, kernel, 0) == 0)
++                       return 1;
++
++       /* skip devices not matching the listed kernel device names */
++       if (!list_empty(&filter_kernel_match_list)) {
++               list_for_each_entry(loop_name, &filter_kernel_match_list, node)
++                       if (fnmatch(loop_name->name, kernel, 0) == 0)
++                               return 0;
++               return 1;
++       }
++
++       return 0;
++}
++
+ static int attr_filtered(const char *path)
+ {
+        struct name_entry *loop_name;
+@@ -296,6 +318,9 @@
+                                        if (dent2->d_name[0] == '.')
+                                                continue;
+ 
++                                       if (kernel_filtered(dent2->d_name))
++                                               continue;
++
+                                        strlcpy(dirname2, dirname, sizeof(dirname2));
+                                        strlcat(dirname2, "/", sizeof(dirname2));
+                                        strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+@@ -402,6 +427,9 @@
+                                        if (!strcmp(dent2->d_name, "device"))
+                                                continue;
+ 
++                                       if (kernel_filtered(dent2->d_name))
++                                               continue;
++
+                                        strlcpy(dirname2, dirname, sizeof(dirname2));
+                                        strlcat(dirname2, "/", sizeof(dirname2));
+                                        strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+@@ -458,6 +486,8 @@
+                { "subsystem-nomatch", 1, NULL, 'S' },
+                { "attr-match", 1, NULL, 'a' },
+                { "attr-nomatch", 1, NULL, 'A' },
++               { "kernel-match", 1, NULL, 'k' },
++               { "kernel-nomatch", 1, NULL, 'K' },
+                {}
+        };
+ 
+@@ -496,6 +526,12 @@
+                case 'A':
+                        name_list_add(&filter_attr_nomatch_list, optarg, 0);
+                        break;
++               case 'k':
++                       name_list_add(&filter_kernel_match_list, optarg, 0);
++                       break;
++               case 'K':
++                       name_list_add(&filter_kernel_nomatch_list, optarg, 0);
++                       break;
+                case 'h':
+                        printf("Usage: udevtrigger OPTIONS\n"
+                               "  --verbose                       print the list of devices while running\n"
+@@ -504,6 +540,8 @@
+                               "                                  marked as failed during a previous run\n"
+                               "  --subsystem-match=<subsystem>   trigger devices from a matching subystem\n"
+                               "  --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
++                              "  --kernel-match=<subsystem>      trigger devices from a matching kernel device name\n"
++                              "  --kernel-nomatch=<subsystem>    exclude devices from a matching kernel device name\n"
+                               "  --attr-match=<file[=<value>]>   trigger devices with a matching sysfs\n"
+                               "                                  attribute\n"
+                               "  --attr-nomatch=<file[=<value>]> exclude devices with a matching sysfs\n"
+@@ -549,6 +587,8 @@
+ exit:
+        name_list_cleanup(&filter_subsystem_match_list);
+        name_list_cleanup(&filter_subsystem_nomatch_list);
++       name_list_cleanup(&filter_kernel_match_list);
++       name_list_cleanup(&filter_kernel_nomatch_list);
+        name_list_cleanup(&filter_attr_match_list);
+        name_list_cleanup(&filter_attr_nomatch_list);
+ 
diff --git a/meta/packages/udev/udev_115.bb b/meta/packages/udev/udev_115.bb
index 6425199678..f9cb63c55f 100644
--- a/meta/packages/udev/udev_115.bb
+++ b/meta/packages/udev/udev_115.bb
@@ -9,6 +9,7 @@ SRC_URI = "http://kernel.org/pub/linux/utils/kernel/hotplug/udev-${PV}.tar.gz \
            file://noasmlinkage.patch;patch=1 \
            file://flags.patch;patch=1 \
            file://vol_id_ld.patch;patch=1 \
+           file://udevtrigger_add_devname_filtering.patch;patch=1 \
            file://mount.blacklist \
            "