summaryrefslogtreecommitdiff
path: root/block/genhd.c
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-26 05:33:09 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-26 05:33:09 -0300
commit4a327fcef90ba27150a3e8741441b68c605ae248 (patch)
treededef84cccbd02054df4cfb844dd3c9d588edf83 /block/genhd.c
parenta156245300d5362a3b4c4afdace9e2b90169fe43 (diff)
Add TuxOnIce support adapted for the 4.5-gnu kernel versionpck-4.5-gnu
Diffstat (limited to 'block/genhd.c')
-rw-r--r--block/genhd.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 9f42526b4..7a6a655d8 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -18,6 +18,8 @@
#include <linux/kobj_map.h>
#include <linux/mutex.h>
#include <linux/idr.h>
+#include <linux/ctype.h>
+#include <linux/fs_uuid.h>
#include <linux/log2.h>
#include <linux/pm_runtime.h>
#include <linux/badblocks.h>
@@ -1417,6 +1419,85 @@ int invalidate_partition(struct gendisk *disk, int partno)
EXPORT_SYMBOL(invalidate_partition);
+dev_t blk_lookup_fs_info(struct fs_info *seek)
+{
+ dev_t devt = MKDEV(0, 0);
+ struct class_dev_iter iter;
+ struct device *dev;
+ int best_score = 0;
+
+ class_dev_iter_init(&iter, &block_class, NULL, &disk_type);
+ while (best_score < 3 && (dev = class_dev_iter_next(&iter))) {
+ struct gendisk *disk = dev_to_disk(dev);
+ struct disk_part_iter piter;
+ struct hd_struct *part;
+
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
+
+ while (best_score < 3 && (part = disk_part_iter_next(&piter))) {
+ int score = part_matches_fs_info(part, seek);
+ if (score > best_score) {
+ devt = part_devt(part);
+ best_score = score;
+ }
+ }
+ disk_part_iter_exit(&piter);
+ }
+ class_dev_iter_exit(&iter);
+ return devt;
+}
+
+/* Caller uses NULL, key to start. For each match found, we return a bdev on
+ * which we have done blkdev_get, and we do the blkdev_put on block devices
+ * that are passed to us. When no more matches are found, we return NULL.
+ */
+struct block_device *next_bdev_of_type(struct block_device *last,
+ const char *key)
+{
+ dev_t devt = MKDEV(0, 0);
+ struct class_dev_iter iter;
+ struct device *dev;
+ struct block_device *next = NULL, *bdev;
+ int got_last = 0;
+
+ if (!key)
+ goto out;
+
+ class_dev_iter_init(&iter, &block_class, NULL, &disk_type);
+ while (!devt && (dev = class_dev_iter_next(&iter))) {
+ struct gendisk *disk = dev_to_disk(dev);
+ struct disk_part_iter piter;
+ struct hd_struct *part;
+
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
+
+ while ((part = disk_part_iter_next(&piter))) {
+ bdev = bdget(part_devt(part));
+ if (last && !got_last) {
+ if (last == bdev)
+ got_last = 1;
+ continue;
+ }
+
+ if (blkdev_get(bdev, FMODE_READ, 0))
+ continue;
+
+ if (bdev_matches_key(bdev, key)) {
+ next = bdev;
+ break;
+ }
+
+ blkdev_put(bdev, FMODE_READ);
+ }
+ disk_part_iter_exit(&piter);
+ }
+ class_dev_iter_exit(&iter);
+out:
+ if (last)
+ blkdev_put(last, FMODE_READ);
+ return next;
+}
+
/*
* Disk events - monitor disk events like media change and eject request.
*/