/* * Copyright (C) 2005, 2006 * Avishay Traeger (avishay@gmail.com) * Copyright (C) 2008, 2009 * Boaz Harrosh <bharrosh@panasas.com> * * This file is part of exofs. * * exofs is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation. Since it is based on ext2, and the only * valid version of GPL for the Linux kernel is version 2, the only valid * version of GPL for exofs is version 2. * * exofs is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with exofs; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <scsi/scsi_device.h> #include "exofs.h" void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj) { osd_sec_init_nosec_doall_caps(cred_a, obj, false, true); } int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj, u64 offset, void *p, unsigned length) { struct osd_request *or = osd_start_request(od, GFP_KERNEL); /* struct osd_sense_info osi = {.key = 0};*/ int ret; if (unlikely(!or)) { EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__); return -ENOMEM; } ret = osd_req_read_kern(or, obj, offset, p, length); if (unlikely(ret)) { EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__); goto out; } ret = osd_finalize_request(or, 0, cred, NULL); if (unlikely(ret)) { EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret); goto out; } ret = osd_execute_request(or); if (unlikely(ret)) EXOFS_DBGMSG("osd_execute_request() => %d\n", ret); /* osd_req_decode_sense(or, ret); */ out: osd_end_request(or); return ret; } int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** pios) { struct exofs_io_state *ios; /*TODO: Maybe use kmem_cach per sbi of size * exofs_io_state_size(sbi->s_numdevs) */ ios = kzalloc(exofs_io_state_size(sbi->s_numdevs), GFP_KERNEL); if (unlikely(!ios)) { *pios = NULL; return -ENOMEM; } ios->sbi = sbi; ios->obj.partition = sbi->s_pid; *pios = ios; return 0; } void exofs_put_io_state(struct exofs_io_state *ios) { if (ios) { unsigned i; for (i = 0; i < ios->numdevs; i++) { struct exofs_per_dev_state *per_dev = &ios->per_dev[i]; if (per_dev->or) osd_end_request(per_dev->or); if (per_dev->bio) bio_put(per_dev->bio); } kfree(ios); } } static void _sync_done(struct exofs_io_state *ios, void *p) { struct completion *waiting = p; complete(waiting); } static void _last_io(struct kref *kref) { struct exofs_io_state *ios = container_of( kref, struct exofs_io_state, kref); ios->done(ios, ios->private); } static void _done_io(struct osd_request *or, void *p) { struct exofs_io_state *ios = p; kref_put(&ios->kref, _last_io); } static int exofs_io_execute(struct exofs_io_state *ios) { DECLARE_COMPLETION_ONSTACK(wait); bool sync = (ios->done == NULL); int i, ret; if (sync) { ios->done = _sync_done; ios->private = &wait; } for (i = 0; i < ios->numdevs; i++) { struct osd_request *or = ios->per_dev[i].or; if (unlikely(!or)) continue; ret = osd_finalize_request(or, 0, ios->cred, NULL); if (unlikely(ret)) { EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret); return ret; } } kref_init(&ios->kref); for (i = 0; i < ios->numdevs; i++) { struct osd_request *or = ios->per_dev[i].or; if (unlikely(!or)) continue; kref_get(&ios->kref); osd_execute_request_async(or, _done_io, ios); } kref_put(&ios->kref, _last_io); ret = 0; if (sync) { wait_for_completion(&wait); ret = exofs_check_io(ios, NULL); } return ret; } int exofs_check_io(struct exofs_io_state *ios, u64 *resid) { enum osd_err_priority acumulated_osd_err = 0; int acumulated_lin_err = 0; int i; for (i = 0; i < ios->numdevs; i++) { struct osd_sense_info osi; int ret = osd_req_decode_sense(ios->per_dev[i].or, &osi); if (likely(!ret)) continue; if (unlikely(ret == -EFAULT)) { EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__); /*FIXME: All the pages in this device range should: * clear_highpage(page); */ } if (osi.osd_err_pri >= acumulated_osd_err) { acumulated_osd_err = osi.osd_err_pri; acumulated_lin_err = ret; } } /* TODO: raid specific residual calculations */ if (resid) { if (likely(!acumulated_lin_err)) *resid = 0; else *resid = ios->length; } return acumulated_lin_err; } int exofs_sbi_create(struct exofs_io_state *ios) { int i, ret; for (i = 0; i < ios->sbi->s_numdevs; i++) { struct osd_request *or; or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; goto out; } ios->per_dev[i].or = or; ios->numdevs++; osd_req_create_object(or, &ios->obj); } ret = exofs_io_execute(ios); out: return ret; } int exofs_sbi_remove(struct exofs_io_state *ios) { int i, ret; for (i = 0; i < ios->sbi->s_numdevs; i++) { struct osd_request *or; or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; goto out; } ios->per_dev[i].or = or; ios->numdevs++; osd_req_remove_object(or, &ios->obj); } ret = exofs_io_execute(ios); out: return ret; } int exofs_sbi_write(struct exofs_io_state *ios) { int i, ret; for (i = 0; i < ios->sbi->s_numdevs; i++) { struct osd_request *or; or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; goto out; } ios->per_dev[i].or = or; ios->numdevs++; if (ios->bio) { struct bio *bio; if (i != 0) { bio = bio_kmalloc(GFP_KERNEL, ios->bio->bi_max_vecs); if (unlikely(!bio)) { ret = -ENOMEM; goto out; } __bio_clone(bio, ios->bio); bio->bi_bdev = NULL; bio->bi_next = NULL; ios->per_dev[i].bio = bio; } else { bio = ios->bio; } osd_req_write(or, &ios->obj, ios->offset, bio, ios->length); /* EXOFS_DBGMSG("write sync=%d\n", sync);*/ } else if (ios->kern_buff) { osd_req_write_kern(or, &ios->obj, ios->offset, ios->kern_buff, ios->length); /* EXOFS_DBGMSG("write_kern sync=%d\n", sync);*/ } else { osd_req_set_attributes(or, &ios->obj); /* EXOFS_DBGMSG("set_attributes sync=%d\n", sync);*/ } if (ios->out_attr) osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); if (ios->in_attr) osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); } ret = exofs_io_execute(ios); out: return ret; } int exofs_sbi_read(struct exofs_io_state *ios) { int i, ret; for (i = 0; i < 1; i++) { struct osd_request *or; unsigned first_dev = (unsigned)ios->obj.id; first_dev %= ios->sbi->s_numdevs; or = osd_start_request(ios->sbi->s_ods[first_dev], GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; goto out; } ios->per_dev[i].or = or; ios->numdevs++; if (ios->bio) { osd_req_read(or, &ios->obj, ios->offset, ios->bio, ios->length); /* EXOFS_DBGMSG("read sync=%d\n", sync);*/ } else if (ios->kern_buff) { osd_req_read_kern(or, &ios->obj, ios->offset, ios->kern_buff, ios->length); /* EXOFS_DBGMSG("read_kern sync=%d\n", sync);*/ } else { osd_req_get_attributes(or, &ios->obj); /* EXOFS_DBGMSG("get_attributes sync=%d\n", sync);*/ } if (ios->out_attr) osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len); if (ios->in_attr) osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len); } ret = exofs_io_execute(ios); out: return ret; } int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr) { struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */ void *iter = NULL; int nelem; do { nelem = 1; osd_req_decode_get_attr_list(ios->per_dev[0].or, &cur_attr, &nelem, &iter); if ((cur_attr.attr_page == attr->attr_page) && (cur_attr.attr_id == attr->attr_id)) { attr->len = cur_attr.len; attr->val_ptr = cur_attr.val_ptr; return 0; } } while (iter); return -EIO; } int exofs_oi_truncate(struct exofs_i_info *oi, u64 size) { struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info; struct exofs_io_state *ios; struct osd_attr attr; __be64 newsize; int i, ret; if (exofs_get_io_state(sbi, &ios)) return -ENOMEM; ios->obj.id = exofs_oi_objno(oi); ios->cred = oi->i_cred; newsize = cpu_to_be64(size); attr = g_attr_logical_length; attr.val_ptr = &newsize; for (i = 0; i < sbi->s_numdevs; i++) { struct osd_request *or; or = osd_start_request(sbi->s_ods[i], GFP_KERNEL); if (unlikely(!or)) { EXOFS_ERR("%s: osd_start_request failed\n", __func__); ret = -ENOMEM; goto out; } ios->per_dev[i].or = or; ios->numdevs++; osd_req_set_attributes(or, &ios->obj); osd_req_add_set_attr_list(or, &attr, 1); } ret = exofs_io_execute(ios); out: exofs_put_io_state(ios); return ret; }