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Commit 04291b62 authored by Boaz Harrosh's avatar Boaz Harrosh Committed by Trond Myklebust
Browse files

pnfs-obj: move to ore 03: Remove old raid engine 



Finally remove all the old raid engine, which is by now
dead code.

Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent eecfc631

fs/nfs/objlayout/objio_osd.c

+0 −504
Original line number Diff line number Diff line
@@ -188,48 +188,6 @@ static int objio_devices_lookup(struct pnfs_layout_hdr *pnfslay, 
	return err;

}



#if 0

static int _verify_data_map(struct pnfs_osd_layout *layout)

{

	struct pnfs_osd_data_map *data_map = &layout->olo_map;

	u64 stripe_length;

	u32 group_width;



/* FIXME: Only raid0 for now. if not go through MDS */

	if (data_map->odm_raid_algorithm != PNFS_OSD_RAID_0) {

		printk(KERN_ERR "Only RAID_0 for now\n");

		return -ENOTSUPP;

	}

	if (0 != (data_map->odm_num_comps % (data_map->odm_mirror_cnt + 1))) {

		printk(KERN_ERR "Data Map wrong, num_comps=%u mirrors=%u\n",

			  data_map->odm_num_comps, data_map->odm_mirror_cnt);

		return -EINVAL;

	}



	if (data_map->odm_group_width)

		group_width = data_map->odm_group_width;

	else

		group_width = data_map->odm_num_comps /

						(data_map->odm_mirror_cnt + 1);



	stripe_length = (u64)data_map->odm_stripe_unit * group_width;

	if (stripe_length >= (1ULL << 32)) {

		printk(KERN_ERR "Total Stripe length(0x%llx)"

			  " >= 32bit is not supported\n", _LLU(stripe_length));

		return -ENOTSUPP;

	}



	if (0 != (data_map->odm_stripe_unit & ~PAGE_MASK)) {

		printk(KERN_ERR "Stripe Unit(0x%llx)"

			  " must be Multples of PAGE_SIZE(0x%lx)\n",

			  _LLU(data_map->odm_stripe_unit), PAGE_SIZE);

		return -ENOTSUPP;

	}



	return 0;

}

#endif



static void copy_single_comp(struct ore_components *oc, unsigned c,

			     struct pnfs_osd_object_cred *src_comp)

{
@@ -441,327 +399,6 @@ static void __on_dev_error(struct ore_io_state *ios, 
				dev_offset, dev_len, !ios->reading);

}



#if 0

static void _clear_bio(struct bio *bio)

{

	struct bio_vec *bv;

	unsigned i;



	__bio_for_each_segment(bv, bio, i, 0) {

		unsigned this_count = bv->bv_len;



		if (likely(PAGE_SIZE == this_count))

			clear_highpage(bv->bv_page);

		else

			zero_user(bv->bv_page, bv->bv_offset, this_count);

	}

}



static int _io_check(struct objio_state *ios, bool is_write)

{

	enum osd_err_priority oep = OSD_ERR_PRI_NO_ERROR;

	int lin_ret = 0;

	int i;



	for (i = 0; i <  ios->numdevs; i++) {

		struct osd_sense_info osi;

		struct osd_request *or = ios->per_dev[i].or;

		int ret;



		if (!or)

			continue;



		ret = osd_req_decode_sense(or, &osi);

		if (likely(!ret))

			continue;



		if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) {

			/* start read offset passed endof file */

			BUG_ON(is_write);

			_clear_bio(ios->per_dev[i].bio);

			dprintk("%s: start read offset passed end of file "

				"offset=0x%llx, length=0x%lx\n", __func__,

				_LLU(ios->per_dev[i].offset),

				ios->per_dev[i].length);



			continue; /* we recovered */

		}

		__on_dev_error(ios, is_write, ios->oc->ods[i],

				ios->per_dev[i].dev, osi.osd_err_pri,

				ios->per_dev[i].offset, ios->per_dev[i].length);



		if (osi.osd_err_pri >= oep) {

			oep = osi.osd_err_pri;

			lin_ret = ret;

		}

	}



	return lin_ret;

}



/*

 * Common IO state helpers.

 */

static void _io_free(struct objio_state *ios)

{

	unsigned i;



	for (i = 0; i < ios->numdevs; i++) {

		struct _objio_per_comp *per_dev = &ios->per_dev[i];



		if (per_dev->or) {

			osd_end_request(per_dev->or);

			per_dev->or = NULL;

		}



		if (per_dev->bio) {

			bio_put(per_dev->bio);

			per_dev->bio = NULL;

		}

	}

}



struct osd_dev *_io_od(struct objio_state *ios, unsigned dev)

{

	unsigned min_dev = ios->oc->first_dev;

	unsigned max_dev = min_dev + ios->oc->numdevs;



	BUG_ON(dev < min_dev || max_dev <= dev);

	return ios->oc->ods[dev - min_dev]->od;

}



struct _striping_info {

	u64 obj_offset;

	u64 group_length;

	unsigned dev;

	unsigned unit_off;

};



static void _calc_stripe_info(struct objio_state *ios, u64 file_offset,

			      struct _striping_info *si)

{

	u32	stripe_unit = ios->layout->stripe_unit;

	u32	group_width = ios->layout->group_width;

	u64	group_depth = ios->layout->group_depth;

	u32	U = stripe_unit * group_width;



	u64	T = U * group_depth;

	u64	S = T * ios->layout->group_count;

	u64	M = div64_u64(file_offset, S);



	/*

	G = (L - (M * S)) / T

	H = (L - (M * S)) % T

	*/

	u64	LmodU = file_offset - M * S;

	u32	G = div64_u64(LmodU, T);

	u64	H = LmodU - G * T;



	u32	N = div_u64(H, U);



	div_u64_rem(file_offset, stripe_unit, &si->unit_off);

	si->obj_offset = si->unit_off + (N * stripe_unit) +

				  (M * group_depth * stripe_unit);



	/* "H - (N * U)" is just "H % U" so it's bound to u32 */

	si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width;

	si->dev *= ios->layout->mirrors_p1;



	si->group_length = T - H;

}



static int _add_stripe_unit(struct objio_state *ios,  unsigned *cur_pg,

		unsigned pgbase, struct _objio_per_comp *per_dev, int len,

		gfp_t gfp_flags)

{

	unsigned pg = *cur_pg;

	int cur_len = len;

	struct request_queue *q =

			osd_request_queue(_io_od(ios, per_dev->dev));



	if (per_dev->bio == NULL) {

		unsigned pages_in_stripe = ios->layout->group_width *

				      (ios->layout->stripe_unit / PAGE_SIZE);

		unsigned bio_size = (ios->nr_pages + pages_in_stripe) /

				    ios->layout->group_width;



		if (BIO_MAX_PAGES_KMALLOC < bio_size)

			bio_size = BIO_MAX_PAGES_KMALLOC;



		per_dev->bio = bio_kmalloc(gfp_flags, bio_size);

		if (unlikely(!per_dev->bio)) {

			dprintk("Faild to allocate BIO size=%u\n", bio_size);

			return -ENOMEM;

		}

	}



	while (cur_len > 0) {

		unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);

		unsigned added_len;



		BUG_ON(ios->nr_pages <= pg);

		cur_len -= pglen;



		added_len = bio_add_pc_page(q, per_dev->bio,

					ios->pages[pg], pglen, pgbase);

		if (unlikely(pglen != added_len))

			return -ENOMEM;

		pgbase = 0;

		++pg;

	}

	BUG_ON(cur_len);



	per_dev->length += len;

	*cur_pg = pg;

	return 0;

}



static int _prepare_one_group(struct objio_state *ios, u64 length,

			      struct _striping_info *si, unsigned *last_pg,

			      gfp_t gfp_flags)

{

	unsigned stripe_unit = ios->layout->stripe_unit;

	unsigned mirrors_p1 = ios->layout->mirrors_p1;

	unsigned devs_in_group = ios->layout->group_width * mirrors_p1;

	unsigned dev = si->dev;

	unsigned first_dev = dev - (dev % devs_in_group);

	unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0;

	unsigned cur_pg = *last_pg;

	int ret = 0;



	while (length) {

		struct _objio_per_comp *per_dev = &ios->per_dev[dev - first_dev];

		unsigned cur_len, page_off = 0;



		if (!per_dev->length) {

			per_dev->dev = dev;

			if (dev < si->dev) {

				per_dev->offset = si->obj_offset + stripe_unit -

								   si->unit_off;

				cur_len = stripe_unit;

			} else if (dev == si->dev) {

				per_dev->offset = si->obj_offset;

				cur_len = stripe_unit - si->unit_off;

				page_off = si->unit_off & ~PAGE_MASK;

				BUG_ON(page_off &&

				      (page_off != ios->pgbase));

			} else { /* dev > si->dev */

				per_dev->offset = si->obj_offset - si->unit_off;

				cur_len = stripe_unit;

			}



			if (max_comp < dev - first_dev)

				max_comp = dev - first_dev;

		} else {

			cur_len = stripe_unit;

		}

		if (cur_len >= length)

			cur_len = length;



		ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev,

				       cur_len, gfp_flags);

		if (unlikely(ret))

			goto out;



		dev += mirrors_p1;

		dev = (dev % devs_in_group) + first_dev;



		length -= cur_len;

		ios->length += cur_len;

	}

out:

	ios->numdevs = max_comp + mirrors_p1;

	*last_pg = cur_pg;

	return ret;

}



static int _io_rw_pagelist(struct objio_state *ios, gfp_t gfp_flags)

{

	u64 length = ios->count;

	u64 offset = ios->offset;

	struct _striping_info si;

	unsigned last_pg = 0;

	int ret = 0;



	while (length) {

		_calc_stripe_info(ios, offset, &si);



		if (length < si.group_length)

			si.group_length = length;



		ret = _prepare_one_group(ios, si.group_length, &si, &last_pg, gfp_flags);

		if (unlikely(ret))

			goto out;



		offset += si.group_length;

		length -= si.group_length;

	}



out:

	if (!ios->length)

		return ret;



	return 0;

}



static int _sync_done(struct objio_state *ios)

{

	struct completion *waiting = ios->private;



	complete(waiting);

	return 0;

}



static void _last_io(struct kref *kref)

{

	struct objio_state *ios = container_of(kref, struct objio_state, kref);



	ios->done(ios);

}



static void _done_io(struct osd_request *or, void *p)

{

	struct objio_state *ios = p;



	kref_put(&ios->kref, _last_io);

}



static int _io_exec(struct objio_state *ios)

{

	DECLARE_COMPLETION_ONSTACK(wait);

	int ret = 0;

	unsigned i;

	objio_done_fn saved_done_fn = ios->done;

	bool sync = ios->sync;



	if (sync) {

		ios->done = _sync_done;

		ios->private = &wait;

	}



	kref_init(&ios->kref);



	for (i = 0; i < ios->numdevs; i++) {

		struct osd_request *or = ios->per_dev[i].or;



		if (!or)

			continue;



		kref_get(&ios->kref);

		osd_execute_request_async(or, _done_io, ios);

	}



	kref_put(&ios->kref, _last_io);



	if (sync) {

		wait_for_completion(&wait);

		ret = saved_done_fn(ios);

	}



	return ret;

}

#endif



/*

 * read

 */
@@ -781,63 +418,6 @@ static void _read_done(struct ore_io_state *ios, void *private) 
	objlayout_read_done(&objios->oir, status, objios->sync);

}



#if 0

static int _read_mirrors(struct objio_state *ios, unsigned cur_comp)

{

	struct osd_request *or = NULL;

	struct _objio_per_comp *per_dev = &ios->per_dev[cur_comp];

	unsigned dev = per_dev->dev;

	struct ore_comp *cred =

			&ios->oc->comps[cur_comp];

	struct osd_obj_id obj = cred->obj;

	int ret;



	or = osd_start_request(_io_od(ios, dev), GFP_KERNEL);

	if (unlikely(!or)) {

		ret = -ENOMEM;

		goto err;

	}

	per_dev->or = or;



	osd_req_read(or, &obj, per_dev->offset, per_dev->bio, per_dev->length);



	ret = osd_finalize_request(or, 0, cred->cred, NULL);

	if (ret) {

		dprintk("%s: Faild to osd_finalize_request() => %d\n",

			__func__, ret);

		goto err;

	}



	dprintk("%s:[%d] dev=%d obj=0x%llx start=0x%llx length=0x%lx\n",

		__func__, cur_comp, dev, obj.id, _LLU(per_dev->offset),

		per_dev->length);



err:

	return ret;

}



static int _read_exec(struct objio_state *ios)

{

	unsigned i;

	int ret;



	for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {

		if (!ios->per_dev[i].length)

			continue;

		ret = _read_mirrors(ios, i);

		if (unlikely(ret))

			goto err;

	}



	ios->done = _read_done;

	return _io_exec(ios);



err:

	_io_free(ios);

	return ret;

}

#endif



int objio_read_pagelist(struct nfs_read_data *rdata)

{

	struct objio_state *objios;
@@ -879,90 +459,6 @@ static void _write_done(struct ore_io_state *ios, void *private) 
	objlayout_write_done(&objios->oir, status, objios->sync);

}



#if 0

static int _write_mirrors(struct objio_state *ios, unsigned cur_comp)

{

	struct _objio_per_comp *master_dev = &ios->per_dev[cur_comp];

	unsigned dev = ios->per_dev[cur_comp].dev;

	unsigned last_comp = cur_comp + ios->layout->mirrors_p1;

	int ret;



	for (; cur_comp < last_comp; ++cur_comp, ++dev) {

		struct osd_request *or = NULL;

		struct ore_comp *cred = &ios->oc->comps[cur_comp];

		struct osd_obj_id obj = cred->obj;

		struct _objio_per_comp *per_dev = &ios->per_dev[cur_comp];

		struct bio *bio;



		or = osd_start_request(_io_od(ios, dev), GFP_NOFS);

		if (unlikely(!or)) {

			ret = -ENOMEM;

			goto err;

		}

		per_dev->or = or;



		if (per_dev != master_dev) {

			bio = bio_kmalloc(GFP_NOFS,

					  master_dev->bio->bi_max_vecs);

			if (unlikely(!bio)) {

				dprintk("Faild to allocate BIO size=%u\n",

					master_dev->bio->bi_max_vecs);

				ret = -ENOMEM;

				goto err;

			}



			__bio_clone(bio, master_dev->bio);

			bio->bi_bdev = NULL;

			bio->bi_next = NULL;

			per_dev->bio = bio;

			per_dev->dev = dev;

			per_dev->length = master_dev->length;

			per_dev->offset =  master_dev->offset;

		} else {

			bio = master_dev->bio;

			bio->bi_rw |= REQ_WRITE;

		}



		osd_req_write(or, &obj, per_dev->offset, bio, per_dev->length);



		ret = osd_finalize_request(or, 0, cred->cred, NULL);

		if (ret) {

			dprintk("%s: Faild to osd_finalize_request() => %d\n",

				__func__, ret);

			goto err;

		}



		dprintk("%s:[%d] dev=%d obj=0x%llx start=0x%llx length=0x%lx\n",

			__func__, cur_comp, dev, obj.id, _LLU(per_dev->offset),

			per_dev->length);

	}



err:

	return ret;

}



static int _write_exec(struct objio_state *ios)

{

	unsigned i;

	int ret;



	for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {

		if (!ios->per_dev[i].length)

			continue;

		ret = _write_mirrors(ios, i);

		if (unlikely(ret))

			goto err;

	}



	ios->done = _write_done;

	return _io_exec(ios);



err:

	_io_free(ios);

	return ret;

}

#endif



int objio_write_pagelist(struct nfs_write_data *wdata, int how)

{

	struct objio_state *objios;