add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/block/partitions/ibm.c
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@@ -13,10 +13,10 @@
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 #include <asm/ebcdic.h>
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 #include <linux/uaccess.h>
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 #include <asm/vtoc.h>
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+#include <linux/module.h>
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+#include <linux/dasd_mod.h>
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 #include "check.h"
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-#include "ibm.h"
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-
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 union label_t {
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 	struct vtoc_volume_label_cdl vol;
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@@ -289,7 +289,9 @@
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  */
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 int ibm_partition(struct parsed_partitions *state)
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 {
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+	int (*fn)(struct gendisk *disk, dasd_information2_t *info);
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 	struct block_device *bdev = state->bdev;
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+	struct gendisk *disk = bdev->bd_disk;
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 	int blocksize, res;
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 	loff_t i_size, offset, size;
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 	dasd_information2_t *info;
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@@ -300,24 +302,29 @@
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 	union label_t *label;
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 	res = 0;
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+	if (!disk->fops->getgeo)
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+		goto out_exit;
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+	fn = symbol_get(dasd_biodasdinfo);
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 	blocksize = bdev_logical_block_size(bdev);
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 	if (blocksize <= 0)
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-		goto out_exit;
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+		goto out_symbol;
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 	i_size = i_size_read(bdev->bd_inode);
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 	if (i_size == 0)
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-		goto out_exit;
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+		goto out_symbol;
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 	info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
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 	if (info == NULL)
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-		goto out_exit;
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+		goto out_symbol;
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 	geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
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 	if (geo == NULL)
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 		goto out_nogeo;
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 	label = kmalloc(sizeof(union label_t), GFP_KERNEL);
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 	if (label == NULL)
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 		goto out_nolab;
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-	if (ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
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+	/* set start if not filled by getgeo function e.g. virtblk */
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+	geo->start = get_start_sect(bdev);
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+	if (disk->fops->getgeo(bdev, geo))
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 		goto out_freeall;
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-	if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0) {
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+	if (!fn || fn(disk, info)) {
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 		kfree(info);
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 		info = NULL;
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 	}
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@@ -360,6 +367,9 @@
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 	kfree(geo);
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 out_nogeo:
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 	kfree(info);
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+out_symbol:
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+	if (fn)
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+		symbol_put(dasd_biodasdinfo);
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 out_exit:
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 	return res;
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 }