diff options
Diffstat (limited to 'sbdd.c')
| -rw-r--r-- | sbdd.c | 36 |
1 files changed, 3 insertions, 33 deletions
@@ -20,9 +20,6 @@ #include <linux/moduleparam.h> #include <linux/spinlock_types.h> -#define SBDD_SECTOR_SHIFT 9 -#define SBDD_SECTOR_SIZE (1 << SBDD_SECTOR_SHIFT) -#define SBDD_MIB_SECTORS (1 << (20 - SBDD_SECTOR_SHIFT)) #define SBDD_NAME "sbdd" struct sbdd { @@ -31,16 +28,14 @@ struct sbdd { atomic_t deleting; atomic_t refs_cnt; sector_t capacity; - u8 *data; struct gendisk *gd; struct request_queue *q; }; static struct sbdd __sbdd; static int __sbdd_major = 0; -static unsigned long __sbdd_capacity_mib = 100; -static sector_t sbdd_xfer(struct bio_vec* bvec, sector_t pos, int dir) +/*static sector_t sbdd_xfer(struct bio_vec* bvec, sector_t pos, int dir) { void *buff = page_address(bvec->bv_page) + bvec->bv_offset; sector_t len = bvec->bv_len >> SBDD_SECTOR_SHIFT; @@ -65,17 +60,11 @@ static sector_t sbdd_xfer(struct bio_vec* bvec, sector_t pos, int dir) pr_debug("pos=%6llu len=%4llu %s\n", pos, len, dir ? "written" : "read"); return len; -} +}*/ static void sbdd_xfer_bio(struct bio *bio) { - struct bvec_iter iter; - struct bio_vec bvec; - int dir = bio_data_dir(bio); - sector_t pos = bio->bi_iter.bi_sector; - - bio_for_each_segment(bvec, bio, iter) - pos += sbdd_xfer(&bvec, pos, dir); + /* TODO: send request to another device */ } static blk_qc_t sbdd_make_request(struct request_queue *q, struct bio *bio) @@ -121,14 +110,6 @@ static int sbdd_create(void) } memset(&__sbdd, 0, sizeof(struct sbdd)); - __sbdd.capacity = (sector_t)__sbdd_capacity_mib * SBDD_MIB_SECTORS; - - pr_info("allocating data\n"); - __sbdd.data = vzalloc(__sbdd.capacity << SBDD_SECTOR_SHIFT); - if (!__sbdd.data) { - pr_err("unable to alloc data\n"); - return -ENOMEM; - } spin_lock_init(&__sbdd.datalock); init_waitqueue_head(&__sbdd.exitwait); @@ -141,9 +122,6 @@ static int sbdd_create(void) } blk_queue_make_request(__sbdd.q, sbdd_make_request); - /* Configure queue */ - blk_queue_logical_block_size(__sbdd.q, SBDD_SECTOR_SIZE); - /* A disk must have at least one minor */ pr_info("allocating disk\n"); __sbdd.gd = alloc_disk(1); @@ -188,11 +166,6 @@ static void sbdd_delete(void) if (__sbdd.gd) put_disk(__sbdd.gd); - if (__sbdd.data) { - pr_info("freeing data\n"); - vfree(__sbdd.data); - } - memset(&__sbdd, 0, sizeof(struct sbdd)); if (__sbdd_major > 0) { @@ -242,9 +215,6 @@ module_init(sbdd_init); /* Called on module unloading. Unloading module is not allowed without it. */ module_exit(sbdd_exit); -/* Set desired capacity with insmod */ -module_param_named(capacity_mib, __sbdd_capacity_mib, ulong, 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"); |