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authorJoursoir <chat@joursoir.net>2023-01-12 18:13:00 +0400
committerJoursoir <chat@joursoir.net>2023-01-16 13:28:29 +0400
commit56aac946d7888eb9696610ab4708f99cb76d0af0 (patch)
treeee7c9aaa082da2e074ef54eca32fecc49dbf9081 /sbdd.c
parent904a1abd878380f9e56fe1c251e4c07c913249ce (diff)
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add driver parameter for target disk
Task: 1
Diffstat (limited to 'sbdd.c')
-rw-r--r--sbdd.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/sbdd.c b/sbdd.c
index 8d8474f..fb62971 100644
--- a/sbdd.c
+++ b/sbdd.c
@@ -22,7 +22,6 @@
#define SBDD_NAME "sbdd"
#define SBDD_BDEV_MODE (FMODE_READ | FMODE_WRITE)
-#define TARGET_DEV "/dev/disk/by-id/ata-QEMU_HARDDISK_QM00001"
struct sbdd {
wait_queue_head_t exitwait;
@@ -37,6 +36,7 @@ struct sbdd {
static struct sbdd __sbdd;
static int __sbdd_major = 0;
+static char *__sbdd_disk = "/dev/disk/by-id/ata-QEMU_HARDDISK_QM00001";
/*static sector_t sbdd_xfer(struct bio_vec* bvec, sector_t pos, int dir)
{
@@ -132,11 +132,11 @@ static int sbdd_create(void)
__sbdd.gd = alloc_disk(1);
/* Get a handle on the device */
- pr_info("opening %s\n", TARGET_DEV);
- __sbdd.bdev = blkdev_get_by_path(TARGET_DEV, SBDD_BDEV_MODE, THIS_MODULE);
+ pr_info("opening %s\n", __sbdd_disk);
+ __sbdd.bdev = blkdev_get_by_path(__sbdd_disk, SBDD_BDEV_MODE, THIS_MODULE);
if (!__sbdd.bdev || IS_ERR(__sbdd.bdev)) {
pr_err("blkdev_get_by_path(\"%s\") failed with %ld\n",
- TARGET_DEV, PTR_ERR(__sbdd.bdev));
+ __sbdd_disk, PTR_ERR(__sbdd.bdev));
return -ENOENT;
}
@@ -184,7 +184,7 @@ static void sbdd_delete(void)
}
if (__sbdd.bdev) {
- pr_info("release a handle on the %s\n", TARGET_DEV);
+ pr_info("release a handle on the %s\n", __sbdd_disk);
blkdev_put(__sbdd.bdev, SBDD_BDEV_MODE);
}
@@ -245,6 +245,9 @@ module_init(sbdd_init);
/* Called on module unloading. Unloading module is not allowed without it. */
module_exit(sbdd_exit);
+/* Set desired target disk with insmod */
+module_param_named(disk, __sbdd_disk, charp, S_IRUGO);
+
/* Note for the kernel: a free license module. A warning will be outputted without it. */
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Simple Block Device Driver");