forked from Minki/linux
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: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Boaz Harrosh
Trond Myklebust
parent
eecfc6312a
commit
04291b628c
@ -188,48 +188,6 @@ out:
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return err;
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}
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#if 0
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static int _verify_data_map(struct pnfs_osd_layout *layout)
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{
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struct pnfs_osd_data_map *data_map = &layout->olo_map;
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u64 stripe_length;
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u32 group_width;
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/* FIXME: Only raid0 for now. if not go through MDS */
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if (data_map->odm_raid_algorithm != PNFS_OSD_RAID_0) {
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printk(KERN_ERR "Only RAID_0 for now\n");
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return -ENOTSUPP;
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}
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if (0 != (data_map->odm_num_comps % (data_map->odm_mirror_cnt + 1))) {
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printk(KERN_ERR "Data Map wrong, num_comps=%u mirrors=%u\n",
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data_map->odm_num_comps, data_map->odm_mirror_cnt);
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return -EINVAL;
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}
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if (data_map->odm_group_width)
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group_width = data_map->odm_group_width;
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else
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group_width = data_map->odm_num_comps /
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(data_map->odm_mirror_cnt + 1);
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stripe_length = (u64)data_map->odm_stripe_unit * group_width;
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if (stripe_length >= (1ULL << 32)) {
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printk(KERN_ERR "Total Stripe length(0x%llx)"
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" >= 32bit is not supported\n", _LLU(stripe_length));
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return -ENOTSUPP;
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}
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if (0 != (data_map->odm_stripe_unit & ~PAGE_MASK)) {
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printk(KERN_ERR "Stripe Unit(0x%llx)"
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" must be Multples of PAGE_SIZE(0x%lx)\n",
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_LLU(data_map->odm_stripe_unit), PAGE_SIZE);
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return -ENOTSUPP;
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}
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return 0;
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}
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#endif
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static void copy_single_comp(struct ore_components *oc, unsigned c,
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struct pnfs_osd_object_cred *src_comp)
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{
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@ -441,327 +399,6 @@ static void __on_dev_error(struct ore_io_state *ios,
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dev_offset, dev_len, !ios->reading);
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}
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#if 0
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static void _clear_bio(struct bio *bio)
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{
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struct bio_vec *bv;
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unsigned i;
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__bio_for_each_segment(bv, bio, i, 0) {
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unsigned this_count = bv->bv_len;
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if (likely(PAGE_SIZE == this_count))
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clear_highpage(bv->bv_page);
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else
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zero_user(bv->bv_page, bv->bv_offset, this_count);
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}
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}
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static int _io_check(struct objio_state *ios, bool is_write)
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{
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enum osd_err_priority oep = OSD_ERR_PRI_NO_ERROR;
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int lin_ret = 0;
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int i;
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for (i = 0; i < ios->numdevs; i++) {
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struct osd_sense_info osi;
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struct osd_request *or = ios->per_dev[i].or;
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int ret;
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if (!or)
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continue;
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ret = osd_req_decode_sense(or, &osi);
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if (likely(!ret))
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continue;
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if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) {
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/* start read offset passed endof file */
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BUG_ON(is_write);
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_clear_bio(ios->per_dev[i].bio);
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dprintk("%s: start read offset passed end of file "
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"offset=0x%llx, length=0x%lx\n", __func__,
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_LLU(ios->per_dev[i].offset),
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ios->per_dev[i].length);
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continue; /* we recovered */
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}
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__on_dev_error(ios, is_write, ios->oc->ods[i],
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ios->per_dev[i].dev, osi.osd_err_pri,
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ios->per_dev[i].offset, ios->per_dev[i].length);
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if (osi.osd_err_pri >= oep) {
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oep = osi.osd_err_pri;
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lin_ret = ret;
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}
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}
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return lin_ret;
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}
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/*
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* Common IO state helpers.
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*/
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static void _io_free(struct objio_state *ios)
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{
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unsigned i;
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for (i = 0; i < ios->numdevs; i++) {
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struct _objio_per_comp *per_dev = &ios->per_dev[i];
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if (per_dev->or) {
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osd_end_request(per_dev->or);
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per_dev->or = NULL;
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}
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if (per_dev->bio) {
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bio_put(per_dev->bio);
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per_dev->bio = NULL;
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}
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}
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}
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struct osd_dev *_io_od(struct objio_state *ios, unsigned dev)
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{
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unsigned min_dev = ios->oc->first_dev;
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unsigned max_dev = min_dev + ios->oc->numdevs;
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BUG_ON(dev < min_dev || max_dev <= dev);
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return ios->oc->ods[dev - min_dev]->od;
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}
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struct _striping_info {
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u64 obj_offset;
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u64 group_length;
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unsigned dev;
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unsigned unit_off;
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};
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static void _calc_stripe_info(struct objio_state *ios, u64 file_offset,
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struct _striping_info *si)
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{
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u32 stripe_unit = ios->layout->stripe_unit;
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u32 group_width = ios->layout->group_width;
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u64 group_depth = ios->layout->group_depth;
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u32 U = stripe_unit * group_width;
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u64 T = U * group_depth;
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u64 S = T * ios->layout->group_count;
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u64 M = div64_u64(file_offset, S);
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/*
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G = (L - (M * S)) / T
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H = (L - (M * S)) % T
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*/
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u64 LmodU = file_offset - M * S;
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u32 G = div64_u64(LmodU, T);
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u64 H = LmodU - G * T;
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u32 N = div_u64(H, U);
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div_u64_rem(file_offset, stripe_unit, &si->unit_off);
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si->obj_offset = si->unit_off + (N * stripe_unit) +
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(M * group_depth * stripe_unit);
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/* "H - (N * U)" is just "H % U" so it's bound to u32 */
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si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width;
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si->dev *= ios->layout->mirrors_p1;
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si->group_length = T - H;
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}
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static int _add_stripe_unit(struct objio_state *ios, unsigned *cur_pg,
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unsigned pgbase, struct _objio_per_comp *per_dev, int len,
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gfp_t gfp_flags)
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{
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unsigned pg = *cur_pg;
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int cur_len = len;
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struct request_queue *q =
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osd_request_queue(_io_od(ios, per_dev->dev));
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if (per_dev->bio == NULL) {
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unsigned pages_in_stripe = ios->layout->group_width *
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(ios->layout->stripe_unit / PAGE_SIZE);
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unsigned bio_size = (ios->nr_pages + pages_in_stripe) /
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ios->layout->group_width;
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if (BIO_MAX_PAGES_KMALLOC < bio_size)
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bio_size = BIO_MAX_PAGES_KMALLOC;
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per_dev->bio = bio_kmalloc(gfp_flags, bio_size);
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if (unlikely(!per_dev->bio)) {
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dprintk("Faild to allocate BIO size=%u\n", bio_size);
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return -ENOMEM;
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}
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}
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while (cur_len > 0) {
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unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);
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unsigned added_len;
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BUG_ON(ios->nr_pages <= pg);
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cur_len -= pglen;
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added_len = bio_add_pc_page(q, per_dev->bio,
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ios->pages[pg], pglen, pgbase);
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if (unlikely(pglen != added_len))
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return -ENOMEM;
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pgbase = 0;
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++pg;
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}
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BUG_ON(cur_len);
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per_dev->length += len;
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*cur_pg = pg;
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return 0;
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}
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static int _prepare_one_group(struct objio_state *ios, u64 length,
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struct _striping_info *si, unsigned *last_pg,
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gfp_t gfp_flags)
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{
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unsigned stripe_unit = ios->layout->stripe_unit;
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unsigned mirrors_p1 = ios->layout->mirrors_p1;
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unsigned devs_in_group = ios->layout->group_width * mirrors_p1;
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unsigned dev = si->dev;
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unsigned first_dev = dev - (dev % devs_in_group);
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unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0;
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unsigned cur_pg = *last_pg;
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int ret = 0;
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while (length) {
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struct _objio_per_comp *per_dev = &ios->per_dev[dev - first_dev];
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unsigned cur_len, page_off = 0;
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if (!per_dev->length) {
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per_dev->dev = dev;
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if (dev < si->dev) {
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per_dev->offset = si->obj_offset + stripe_unit -
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si->unit_off;
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cur_len = stripe_unit;
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} else if (dev == si->dev) {
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per_dev->offset = si->obj_offset;
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cur_len = stripe_unit - si->unit_off;
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page_off = si->unit_off & ~PAGE_MASK;
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BUG_ON(page_off &&
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(page_off != ios->pgbase));
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} else { /* dev > si->dev */
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per_dev->offset = si->obj_offset - si->unit_off;
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cur_len = stripe_unit;
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}
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if (max_comp < dev - first_dev)
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max_comp = dev - first_dev;
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} else {
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cur_len = stripe_unit;
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}
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if (cur_len >= length)
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cur_len = length;
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ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev,
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cur_len, gfp_flags);
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if (unlikely(ret))
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goto out;
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dev += mirrors_p1;
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dev = (dev % devs_in_group) + first_dev;
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length -= cur_len;
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ios->length += cur_len;
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}
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out:
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ios->numdevs = max_comp + mirrors_p1;
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*last_pg = cur_pg;
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return ret;
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}
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static int _io_rw_pagelist(struct objio_state *ios, gfp_t gfp_flags)
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{
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u64 length = ios->count;
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u64 offset = ios->offset;
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struct _striping_info si;
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unsigned last_pg = 0;
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int ret = 0;
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while (length) {
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_calc_stripe_info(ios, offset, &si);
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if (length < si.group_length)
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si.group_length = length;
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ret = _prepare_one_group(ios, si.group_length, &si, &last_pg, gfp_flags);
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if (unlikely(ret))
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goto out;
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offset += si.group_length;
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length -= si.group_length;
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}
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out:
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if (!ios->length)
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return ret;
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return 0;
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}
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static int _sync_done(struct objio_state *ios)
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{
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struct completion *waiting = ios->private;
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complete(waiting);
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return 0;
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}
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static void _last_io(struct kref *kref)
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{
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struct objio_state *ios = container_of(kref, struct objio_state, kref);
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ios->done(ios);
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}
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static void _done_io(struct osd_request *or, void *p)
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{
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struct objio_state *ios = p;
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kref_put(&ios->kref, _last_io);
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}
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static int _io_exec(struct objio_state *ios)
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{
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DECLARE_COMPLETION_ONSTACK(wait);
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int ret = 0;
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unsigned i;
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objio_done_fn saved_done_fn = ios->done;
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bool sync = ios->sync;
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if (sync) {
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ios->done = _sync_done;
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ios->private = &wait;
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}
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kref_init(&ios->kref);
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for (i = 0; i < ios->numdevs; i++) {
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struct osd_request *or = ios->per_dev[i].or;
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if (!or)
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continue;
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kref_get(&ios->kref);
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osd_execute_request_async(or, _done_io, ios);
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}
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kref_put(&ios->kref, _last_io);
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if (sync) {
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wait_for_completion(&wait);
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ret = saved_done_fn(ios);
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}
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return ret;
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}
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#endif
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/*
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* read
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*/
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@ -781,63 +418,6 @@ static void _read_done(struct ore_io_state *ios, void *private)
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objlayout_read_done(&objios->oir, status, objios->sync);
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}
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#if 0
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static int _read_mirrors(struct objio_state *ios, unsigned cur_comp)
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{
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struct osd_request *or = NULL;
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struct _objio_per_comp *per_dev = &ios->per_dev[cur_comp];
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unsigned dev = per_dev->dev;
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struct ore_comp *cred =
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&ios->oc->comps[cur_comp];
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struct osd_obj_id obj = cred->obj;
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int ret;
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or = osd_start_request(_io_od(ios, dev), GFP_KERNEL);
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if (unlikely(!or)) {
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ret = -ENOMEM;
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goto err;
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}
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per_dev->or = or;
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osd_req_read(or, &obj, per_dev->offset, per_dev->bio, per_dev->length);
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ret = osd_finalize_request(or, 0, cred->cred, NULL);
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if (ret) {
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dprintk("%s: Faild to osd_finalize_request() => %d\n",
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__func__, ret);
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goto err;
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}
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dprintk("%s:[%d] dev=%d obj=0x%llx start=0x%llx length=0x%lx\n",
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__func__, cur_comp, dev, obj.id, _LLU(per_dev->offset),
|
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per_dev->length);
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|
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err:
|
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return ret;
|
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}
|
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|
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static int _read_exec(struct objio_state *ios)
|
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{
|
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unsigned i;
|
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int ret;
|
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|
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for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
|
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if (!ios->per_dev[i].length)
|
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continue;
|
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ret = _read_mirrors(ios, i);
|
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if (unlikely(ret))
|
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goto err;
|
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}
|
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|
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ios->done = _read_done;
|
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return _io_exec(ios);
|
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|
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err:
|
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_io_free(ios);
|
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return ret;
|
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}
|
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#endif
|
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|
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int objio_read_pagelist(struct nfs_read_data *rdata)
|
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{
|
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struct objio_state *objios;
|
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@ -879,90 +459,6 @@ static void _write_done(struct ore_io_state *ios, void *private)
|
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objlayout_write_done(&objios->oir, status, objios->sync);
|
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}
|
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|
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#if 0
|
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static int _write_mirrors(struct objio_state *ios, unsigned cur_comp)
|
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{
|
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struct _objio_per_comp *master_dev = &ios->per_dev[cur_comp];
|
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unsigned dev = ios->per_dev[cur_comp].dev;
|
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unsigned last_comp = cur_comp + ios->layout->mirrors_p1;
|
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int ret;
|
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|
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for (; cur_comp < last_comp; ++cur_comp, ++dev) {
|
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struct osd_request *or = NULL;
|
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struct ore_comp *cred = &ios->oc->comps[cur_comp];
|
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struct osd_obj_id obj = cred->obj;
|
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struct _objio_per_comp *per_dev = &ios->per_dev[cur_comp];
|
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struct bio *bio;
|
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|
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or = osd_start_request(_io_od(ios, dev), GFP_NOFS);
|
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if (unlikely(!or)) {
|
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ret = -ENOMEM;
|
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goto err;
|
||||
}
|
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per_dev->or = or;
|
||||
|
||||
if (per_dev != master_dev) {
|
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bio = bio_kmalloc(GFP_NOFS,
|
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master_dev->bio->bi_max_vecs);
|
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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;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user