chiark / gitweb /
[PATCH] add a script that tests the IGNORE rule
[elogind.git] / namedev.c
index c77b0f8ef43a598d46b4437fef5e0e991ccde7d3..226c1d313f65ef989ee5c72f58c9615759e329a5 100644 (file)
--- a/namedev.c
+++ b/namedev.c
@@ -104,12 +104,11 @@ static int strcmp_pattern(const char *p, const char *s)
 
 int add_perm_dev(struct perm_device *new_dev)
 {
-       struct list_head *tmp;
+       struct perm_device *dev;
        struct perm_device *tmp_dev;
 
        /* update the values if we already have the device */
-       list_for_each(tmp, &perm_device_list) {
-               struct perm_device *dev = list_entry(tmp, struct perm_device, node);
+       list_for_each_entry(dev, &perm_device_list, node) {
                if (strcmp_pattern(new_dev->name, dev->name))
                        continue;
                copy_var(dev, new_dev, mode);
@@ -130,11 +129,9 @@ int add_perm_dev(struct perm_device *new_dev)
 
 static struct perm_device *find_perm(char *name)
 {
-       struct list_head *tmp;
-       struct perm_device *perm = NULL;
+       struct perm_device *perm;
 
-       list_for_each(tmp, &perm_device_list) {
-               perm = list_entry(tmp, struct perm_device, node);
+       list_for_each_entry(perm, &perm_device_list, node) {
                if (strcmp_pattern(perm->name, name))
                        continue;
                return perm;
@@ -200,11 +197,12 @@ static void apply_format(struct udevice *udev, unsigned char *string)
                        case 'D':
                                if (strlen(udev->kernel_number) == 0) {
                                        strcat(pos, "disc");
+                                       dbg("substitute devfs disc");
                                        break;
                                }
                                strcat(pos, "part");
                                strcat(pos, udev->kernel_number);
-                               dbg("substitute kernel number '%s'", udev->kernel_number);
+                               dbg("substitute devfs part '%s'", udev->kernel_number);
                                break;
                        case 'm':
                                sprintf(pos, "%u", udev->minor);
@@ -229,8 +227,10 @@ static void apply_format(struct udevice *udev, unsigned char *string)
                                                        break;
                                                }
                                        }
-                                       strcat(pos, pos3);
-                                       dbg("substitute partial callout output '%s'", pos3);
+                                       if (pos3) {
+                                               strcat(pos, pos3);
+                                               dbg("substitute partial callout output '%s'", pos3);
+                                       }
                                } else {
                                        strcat(pos, udev->callout_value);
                                        dbg("substitute callout output '%s'", udev->callout_value);
@@ -252,6 +252,8 @@ static struct bus_file {
 } bus_files[] = {
        { .bus = "scsi",        .file = "vendor" },
        { .bus = "usb",         .file = "idVendor" },
+       { .bus = "ide",         .file = "detach_state" },
+       { .bus = "pci",         .file = "vendor" },
        {}
 };
 
@@ -296,6 +298,27 @@ exit:
        return; /* here to prevent compiler warning... */
 }
 
+static int do_ignore(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
+{
+       struct config_device *dev;
+       struct list_head *tmp;
+
+       list_for_each(tmp, &config_device_list) {
+               dev = list_entry(tmp, struct config_device, node);
+               if (dev->type != IGNORE)
+                       continue;
+
+               dbg("compare name '%s' with '%s'", dev->kernel_name, class_dev->name);
+               if (strcmp_pattern(dev->kernel_name, class_dev->name) != 0)
+                       continue;
+
+               dbg("found name, '%s' will be ignored", dev->kernel_name);
+
+               return 0;
+       }
+       return -ENODEV;
+}
+
 static int exec_callout(struct config_device *dev, char *value, int len)
 {
        int retval;
@@ -391,14 +414,15 @@ static int exec_callout(struct config_device *dev, char *value, int len)
 static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 {
        struct config_device *dev;
-       struct list_head *tmp;
 
-       list_for_each(tmp, &config_device_list) {
-               dev = list_entry(tmp, struct config_device, node);
+       list_for_each_entry(dev, &config_device_list, node) {
                if (dev->type != CALLOUT)
                        continue;
 
-               if (sysfs_device) {
+               if (dev->bus[0] != '\0') {
+                       /* as the user specified a bus, we must match it up */
+                       if (!sysfs_device)
+                               continue;
                        dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
                        if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
                                continue;
@@ -460,16 +484,17 @@ static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev,
 {
        struct sysfs_pair *pair;
        struct config_device *dev;
-       struct list_head *tmp;
        int i;
        int match;
 
-       list_for_each(tmp, &config_device_list) {
-               dev = list_entry(tmp, struct config_device, node);
+       list_for_each_entry(dev, &config_device_list, node) {
                if (dev->type != LABEL)
                        continue;
 
-               if (sysfs_device) {
+               if (dev->bus[0] != '\0') {
+                       /* as the user specified a bus, we must match it up */
+                       if (!sysfs_device)
+                               continue;
                        dbg("dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
                        if (strcasecmp(dev->bus, sysfs_device->bus) != 0)
                                continue;
@@ -502,7 +527,6 @@ static int do_label(struct sysfs_class_device *class_dev, struct udevice *udev,
 static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 {
        struct config_device *dev;
-       struct list_head *tmp;
        char path[SYSFS_PATH_MAX];
        int found;
        char *temp = NULL;
@@ -511,8 +535,7 @@ static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev,
        if (!sysfs_device)
                return -ENODEV;
 
-       list_for_each(tmp, &config_device_list) {
-               dev = list_entry(tmp, struct config_device, node);
+       list_for_each_entry(dev, &config_device_list, node) {
                if (dev->type != NUMBER)
                        continue;
 
@@ -547,7 +570,6 @@ static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev,
 static int do_topology(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 {
        struct config_device *dev;
-       struct list_head *tmp;
        char path[SYSFS_PATH_MAX];
        int found;
        char *temp = NULL;
@@ -556,8 +578,7 @@ static int do_topology(struct sysfs_class_device *class_dev, struct udevice *ude
        if (!sysfs_device)
                return -ENODEV;
 
-       list_for_each(tmp, &config_device_list) {
-               dev = list_entry(tmp, struct config_device, node);
+       list_for_each_entry(dev, &config_device_list, node) {
                if (dev->type != TOPOLOGY)
                        continue;
 
@@ -593,10 +614,8 @@ static int do_topology(struct sysfs_class_device *class_dev, struct udevice *ude
 static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
 {
        struct config_device *dev;
-       struct list_head *tmp;
 
-       list_for_each(tmp, &config_device_list) {
-               dev = list_entry(tmp, struct config_device, node);
+       list_for_each_entry(dev, &config_device_list, node) {
                if (dev->type != REPLACE)
                        continue;
 
@@ -624,57 +643,51 @@ static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_de
        struct sysfs_device *sysfs_device;
        struct sysfs_class_device *class_dev_parent;
        int loop;
-
-       /* FIXME!!! */
-       /* This is needed here as we can easily out-race the placement of the
-        * device symlink by the kernel.  The call to sleep(1); will be removed
-        * once libsysfs can be queried for sysfs_get_classdev_device()
-        * multiple times and have it return the proper information when the
-        * class device really shows up.  For now, we live with the time
-        * delay...
+       char filename[SYSFS_PATH_MAX + 6];
+       int retval;
+       char *temp;
+       int partition = 0;
+
+       /* Figure out where the device symlink is at.  For char devices this will
+        * always be in the class_dev->path.  But for block devices, it's different.
+        * The main block device will have the device symlink in it's path, but
+        * all partitions have the symlink in its parent directory.
+        * But we need to watch out for block devices that do not have parents, yet
+        * look like a partition (fd0, loop0, etc.)  They all do not have a device
+        * symlink yet.  We do sit and spin on waiting for them right now, we should
+        * possibly have a whitelist for these devices here...
         */
-       sleep(1);
+       strcpy(filename, class_dev->path);
+       dbg("filename = %s", filename);
+       if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
+               if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
+                       temp = strrchr(filename, '/');
+                       if (temp) {
+                               char *temp2 = strrchr(filename, '/');
+                               partition = 1;
+                               *temp = 0x00;
+                               dbg("temp2 = %s", temp2);
+                               if (temp2 && (strcmp(temp2, "/block") == 0)) {
+                                       /* oops, we have no parent block device, so go back to original directory */
+                                       strcpy(filename, class_dev->path);
+                                       partition = 0;
+                               }
+                       }
+               }
+       }
+       strcat(filename, "/device");
 
-#if 0  /* FIXME
-          Something like this could also work, but for some reason doesn't,
-          I also tried just stat() on the device symlink, but that still
-          has nasty races, I'm probably doing something stupid... :( */
-       loop = 10;
+       loop = 2;
        while (loop--) {
                struct stat buf;
-               int retval;
-               char filename[SYSFS_PATH_MAX + 6];
-
-               strcpy(filename, class_dev->path);
-               strcat(filename, "/device");
                dbg("looking for '%s'", filename);
                retval = stat(filename, &buf);
                if (!retval)
                        break;
-
-               /* bah, let's go backwards up a level to see if the device is there,
-                * as block partitions don't point to the physical device.  Need to fix that
-                * up in the kernel...
-                */
-               if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
-                       if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
-                               class_dev_parent = sysfs_get_classdev_parent(class_dev);
-                               if (class_dev_parent == NULL) {
-                                       dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
-                               } else {
-                                       strcpy(filename, class_dev_parent->path);
-                                       strcat(filename, "/device");
-                                       dbg("looking for '%s'", filename);
-                                       retval = stat(filename, &buf);
-                                       if (!retval)
-                                               break;
-                               }
-                       }
-               }
                /* sleep to give the kernel a chance to create the device file */
                sleep(1);
        }
-#endif
+
        loop = 1;       /* FIXME put a real value in here for when everything is fixed... */
        while (loop--) {
                /* find the sysfs_device for this class device */
@@ -683,28 +696,28 @@ static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_de
                if (sysfs_device != NULL)
                        goto exit;
 
-               /* bah, let's go backwards up a level to see if the device is there,
-                * as block partitions don't point to the physical device.  Need to fix that
-                * up in the kernel...
-                */
-               if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
-                       dbg("looking at block device");
-                       if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
-                               dbg("really is a partition");
-                               class_dev_parent = sysfs_get_classdev_parent(class_dev);
-                               if (class_dev_parent == NULL) {
-                                       dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
-                               } else {
-                                       dbg("class_dev_parent->name='%s'", class_dev_parent->name);
-                                       sysfs_device = sysfs_get_classdev_device(class_dev_parent);
-                                       if (sysfs_device != NULL)
-                                               goto exit;
-                               }
+               /* if it's a partition, we need to get the parent device */
+               if (partition) {
+                       /* FIXME  HACK HACK HACK HACK
+                        * for some reason partitions need this extra sleep here, in order
+                        * to wait for the device properly.  Once the libsysfs code is
+                        * fixed properly, this sleep should go away, and we can just loop above.
+                        */
+                       sleep(1);
+                       dbg("really is a partition");
+                       class_dev_parent = sysfs_get_classdev_parent(class_dev);
+                       if (class_dev_parent == NULL) {
+                               dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
+                       } else {
+                               dbg("class_dev_parent->name='%s'", class_dev_parent->name);
+                               sysfs_device = sysfs_get_classdev_device(class_dev_parent);
+                               if (sysfs_device != NULL)
+                                       goto exit;
                        }
                }
                /* sleep to give the kernel a chance to create the link */
-               sleep(1);
-
+               /* FIXME remove comment...
+               sleep(1); */
        }
        dbg("Timed out waiting for device symlink, continuing on anyway...");
 exit:
@@ -742,6 +755,12 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
        dbg("kernel_number='%s'", udev->kernel_number);
 
        /* rules are looked at in priority order */
+       retval = do_ignore(class_dev, udev, sysfs_device);
+       if (retval == 0) {
+               dbg("name, '%s' is being ignored", class_dev->name);
+               return 1;
+       }
+
        retval = do_callout(class_dev, udev, sysfs_device);
        if (retval == 0)
                goto found;