generic: 5.15: get uImage.FIT partition parser ready

Prepare uImage.FIT partition parser for Linux 5.15

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

target/linux/generic/files/block/partitions/fit.c

@@ -20,6 +20,7 @@
 #include <linux/of_device.h>
 #include <linux/of_fdt.h>
 #include <linux/libfdt.h>
+#include <linux/version.h>
 
 #include "check.h"
 
@@ -72,7 +73,12 @@
 
 int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector, u64 sectors, int *slot, int add_remain)
 {
-	struct address_space *mapping = state->bdev->bd_inode->i_mapping;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 11, 0)
+	struct block_device *bdev = state->disk->part0;
+#else
+	struct block_device *bdev = state->bdev;
+#endif
+	struct address_space *mapping = bdev->bd_inode->i_mapping;
 	struct page *page;
 	void *fit, *init_fit;
 	struct partition_meta_info *info;
@@ -116,7 +122,7 @@ int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector,
 		return 0;
 	}
 
-	dsectors = get_capacity(state->bdev->bd_disk);
+	dsectors = get_capacity(bdev->bd_disk);
 	if (sectors)
 		dsectors = (dsectors>sectors)?sectors:dsectors;
 

target/linux/generic/hack-5.15/401-mtd-super-don-t-reply-on-mtdblock-device-minor.patch

@@ -1,84 +0,0 @@
-From f9760b158f610b1792a222cc924073724c061bfb Mon Sep 17 00:00:00 2001
-From: Daniel Golle <daniel@makrotopia.org>
-Date: Wed, 7 Apr 2021 22:37:57 +0100
-Subject: [PATCH 1/2] mtd: super: don't reply on mtdblock device minor
-To: linux-mtd@lists.infradead.org
-Cc: Vignesh Raghavendra <vigneshr@ti.com>,
-    Richard Weinberger <richard@nod.at>,
-    Miquel Raynal <miquel.raynal@bootlin.com>,
-    David Woodhouse <dwmw2@infradead.org>
-
-For blktrans devices with partitions (ie. part_bits != 0) the
-assumption that the minor number of the mtdblock device matches
-the mtdnum doesn't hold true.
-Properly resolve mtd device from blktrans layer instead.
-
-Signed-off-by: Daniel Golle <daniel@makrotopia.org>
----
- drivers/mtd/mtdsuper.c | 33 ++++++++++++++++++++++++++-------
- 1 file changed, 26 insertions(+), 7 deletions(-)
-
---- a/drivers/mtd/mtdsuper.c
-+++ b/drivers/mtd/mtdsuper.c
-@@ -9,6 +9,7 @@
-  */
- 
- #include <linux/mtd/super.h>
-+#include <linux/mtd/blktrans.h>
- #include <linux/namei.h>
- #include <linux/export.h>
- #include <linux/ctype.h>
-@@ -120,8 +121,9 @@ int get_tree_mtd(struct fs_context *fc,
- 				struct fs_context *fc))
- {
- #ifdef CONFIG_BLOCK
--	dev_t dev;
--	int ret;
-+	struct mtd_blktrans_dev *blktrans_dev;
-+	struct block_device *bdev;
-+	int ret, part_bits;
- #endif
- 	int mtdnr;
- 
-@@ -169,16 +171,36 @@ int get_tree_mtd(struct fs_context *fc,
- 	/* try the old way - the hack where we allowed users to mount
- 	 * /dev/mtdblock$(n) but didn't actually _use_ the blockdev
- 	 */
--	ret = lookup_bdev(fc->source, &dev);
--	if (ret) {
-+	bdev = blkdev_get_by_path(fc->source, FMODE_READ, NULL);
-+	if (IS_ERR(bdev)) {
-+		ret = PTR_ERR(bdev);
- 		errorf(fc, "MTD: Couldn't look up '%s': %d", fc->source, ret);
- 		return ret;
- 	}
--	pr_debug("MTDSB: lookup_bdev() returned 0\n");
-+	pr_debug("MTDSB: blkdev_get_by_path() returned 0\n");
- 
--	if (MAJOR(dev) == MTD_BLOCK_MAJOR)
--		return mtd_get_sb_by_nr(fc, MINOR(dev), fill_super);
-+	if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
-+		if (!bdev->bd_disk) {
-+			blkdev_put(bdev, FMODE_READ);
-+			BUG();
-+			return -EINVAL;
-+		}
- 
-+		blktrans_dev = (struct mtd_blktrans_dev *)(bdev->bd_disk->private_data);
-+		if (!blktrans_dev || !blktrans_dev->tr) {
-+			blkdev_put(bdev, FMODE_READ);
-+			BUG();
-+			return -EINVAL;
-+		}
-+		mtdnr = blktrans_dev->devnum;
-+		part_bits = blktrans_dev->tr->part_bits;
-+		blkdev_put(bdev, FMODE_READ);
-+		if (MINOR(bdev->bd_dev) != (mtdnr << part_bits))
-+			return -EINVAL;
-+ 
-+		return mtd_get_sb_by_nr(fc, mtdnr, fill_super);
-+	}
-+	blkdev_put(bdev, FMODE_READ);
- #endif /* CONFIG_BLOCK */
- 
- 	if (!(fc->sb_flags & SB_SILENT))

target/linux/generic/hack-5.15/402-mtd-blktrans-call-add-disks-after-mtd-device.patch

@@ -25,7 +25,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
 
 --- a/drivers/mtd/mtd_blkdevs.c
 +++ b/drivers/mtd/mtd_blkdevs.c
-@@ -457,13 +457,6 @@ int add_mtd_blktrans_dev(struct mtd_blkt
+@@ -384,13 +384,6 @@ int add_mtd_blktrans_dev(struct mtd_blkt
  	if (new->readonly)
  		set_disk_ro(gd, 1);
  
@@ -37,9 +37,9 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
 -		WARN_ON(ret);
 -	}
  	return 0;
- error4:
- 	kfree(new->tag_set);
-@@ -475,6 +468,27 @@ error1:
+ 
+ out_free_tag_set:
+@@ -402,6 +395,27 @@ out_list_del:
  	return ret;
  }
  
@@ -77,9 +77,9 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  
  #include "mtdcore.h"
  
-@@ -851,6 +852,8 @@ int mtd_device_parse_register(struct mtd
- 		register_reboot_notifier(&mtd->reboot_notifier);
- 	}
+@@ -1000,6 +1001,8 @@ int mtd_device_parse_register(struct mtd
+ 
+ 	ret = mtd_otp_nvmem_add(mtd);
  
 +	register_mtd_blktrans_devs();
 +

target/linux/generic/hack-5.15/410-block-fit-partition-parser.patch

@@ -80,10 +80,10 @@
  
 +#ifdef CONFIG_FIT_PARTITION
 +	if ((state->parts[p].flags & ADDPART_FLAG_ROOTDEV) && ROOT_DEV == 0)
-+		ROOT_DEV = part_to_dev(part)->devt;
++		ROOT_DEV = part->bd_dev;
 +
 +	if (state->parts[p].flags & ADDPART_FLAG_READONLY)
-+		part->policy = true;
++		set_disk_ro(disk, true);
 +#endif
 +
  	return true;
@@ -91,20 +91,8 @@
  
 --- a/drivers/mtd/ubi/block.c
 +++ b/drivers/mtd/ubi/block.c
-@@ -396,7 +396,11 @@ int ubiblock_create(struct ubi_volume_in
- 
- 	gd->fops = &ubiblock_ops;
- 	gd->major = ubiblock_major;
-+#ifdef CONFIG_FIT_PARTITION
-+	gd->minors = 0;
-+#else
- 	gd->minors = 1;
-+#endif
- 	gd->first_minor = idr_alloc(&ubiblock_minor_idr, dev, 0, 0, GFP_KERNEL);
- 	if (gd->first_minor < 0) {
- 		dev_err(disk_to_dev(gd),
 @@ -413,6 +417,9 @@ int ubiblock_create(struct ubi_volume_in
- 		goto out_put_disk;
+ 		goto out_cleanup_disk;
  	}
  	gd->private_data = dev;
 +#ifdef CONFIG_FIT_PARTITION
@@ -113,6 +101,18 @@
  	sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
  	set_capacity(gd, disk_capacity);
  	dev->gd = gd;
+--- a/drivers/mtd/mtd_blkdevs.c
++++ b/drivers/mtd/mtd_blkdevs.c
+@@ -345,6 +345,9 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
+ 	gd->first_minor = (new->devnum) << tr->part_bits;
+ 	gd->minors = 1 << tr->part_bits;
+ 	gd->fops = &mtd_block_ops;
++#ifdef CONFIG_FIT_PARTITION
++	gd->flags |= GENHD_FL_EXT_DEVT;
++#endif
+ 
+ 	if (tr->part_bits)
+ 		if (new->devnum < 26)
 --- a/block/partitions/efi.c
 +++ b/block/partitions/efi.c
 @@ -706,6 +706,9 @@ int efi_partition(struct parsed_partitio
@@ -149,43 +149,6 @@
  
  typedef struct _gpt_header {
  	__le64 signature;
---- a/drivers/mtd/mtdblock.c
-+++ b/drivers/mtd/mtdblock.c
-@@ -334,7 +334,11 @@ static void mtdblock_remove_dev(struct m
- static struct mtd_blktrans_ops mtdblock_tr = {
- 	.name		= "mtdblock",
- 	.major		= MTD_BLOCK_MAJOR,
-+#ifdef CONFIG_FIT_PARTITION
-+	.part_bits	= 2,
-+#else
- 	.part_bits	= 0,
-+#endif
- 	.blksize 	= 512,
- 	.open		= mtdblock_open,
- 	.flush		= mtdblock_flush,
---- a/drivers/mtd/mtd_blkdevs.c
-+++ b/drivers/mtd/mtd_blkdevs.c
-@@ -407,18 +407,8 @@ int add_mtd_blktrans_dev(struct mtd_blkt
- 	gd->first_minor = (new->devnum) << tr->part_bits;
- 	gd->fops = &mtd_block_ops;
- 
--	if (tr->part_bits)
--		if (new->devnum < 26)
--			snprintf(gd->disk_name, sizeof(gd->disk_name),
--				 "%s%c", tr->name, 'a' + new->devnum);
--		else
--			snprintf(gd->disk_name, sizeof(gd->disk_name),
--				 "%s%c%c", tr->name,
--				 'a' - 1 + new->devnum / 26,
--				 'a' + new->devnum % 26);
--	else
--		snprintf(gd->disk_name, sizeof(gd->disk_name),
--			 "%s%d", tr->name, new->devnum);
-+	snprintf(gd->disk_name, sizeof(gd->disk_name),
-+		 "%s%d", tr->name, new->devnum);
- 
- 	set_capacity(gd, ((u64)new->size * tr->blksize) >> 9);
- 
 --- a/block/partitions/msdos.c
 +++ b/block/partitions/msdos.c
 @@ -563,6 +563,15 @@ static void parse_minix(struct parsed_pa

target/linux/generic/hack-5.15/420-mtd-set-rootfs-to-be-root-dev.patch

@@ -20,7 +20,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #include <linux/nvmem-provider.h>
  
  #include <linux/mtd/mtd.h>
-@@ -694,6 +695,19 @@ int add_mtd_device(struct mtd_info *mtd)
+@@ -694,6 +695,16 @@ int add_mtd_device(struct mtd_info *mtd)
  	   of this try_ nonsense, and no bitching about it
  	   either. :) */
  	__module_get(THIS_MODULE);
@@ -31,9 +31,6 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 +		unsigned int index = mtd->index;
 +		pr_notice("mtd: device %d (%s) set to be root filesystem\n",
 +			  mtd->index, mtd->name);
-+#ifdef CONFIG_FIT_PARTITION
-+		index <<= 2;
-+#endif
 +		ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index);
 +	}
 +