1 /* 2 * Module for pnfs flexfile layout driver. 3 * 4 * Copyright (c) 2014, Primary Data, Inc. All rights reserved. 5 * 6 * Tao Peng <bergwolf@primarydata.com> 7 */ 8 9 #include <linux/nfs_fs.h> 10 #include <linux/nfs_page.h> 11 #include <linux/module.h> 12 13 #include <linux/sunrpc/metrics.h> 14 15 #include "flexfilelayout.h" 16 #include "../nfs4session.h" 17 #include "../nfs4idmap.h" 18 #include "../internal.h" 19 #include "../delegation.h" 20 #include "../nfs4trace.h" 21 #include "../iostat.h" 22 #include "../nfs.h" 23 #include "../nfs42.h" 24 25 #define NFSDBG_FACILITY NFSDBG_PNFS_LD 26 27 #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ) 28 29 static struct group_info *ff_zero_group; 30 31 static struct pnfs_layout_hdr * 32 ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) 33 { 34 struct nfs4_flexfile_layout *ffl; 35 36 ffl = kzalloc(sizeof(*ffl), gfp_flags); 37 if (ffl) { 38 INIT_LIST_HEAD(&ffl->error_list); 39 INIT_LIST_HEAD(&ffl->mirrors); 40 ffl->last_report_time = ktime_get(); 41 return &ffl->generic_hdr; 42 } else 43 return NULL; 44 } 45 46 static void 47 ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo) 48 { 49 struct nfs4_ff_layout_ds_err *err, *n; 50 51 list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list, 52 list) { 53 list_del(&err->list); 54 kfree(err); 55 } 56 kfree(FF_LAYOUT_FROM_HDR(lo)); 57 } 58 59 static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 60 { 61 __be32 *p; 62 63 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); 64 if (unlikely(p == NULL)) 65 return -ENOBUFS; 66 stateid->type = NFS4_PNFS_DS_STATEID_TYPE; 67 memcpy(stateid->data, p, NFS4_STATEID_SIZE); 68 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__, 69 p[0], p[1], p[2], p[3]); 70 return 0; 71 } 72 73 static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid) 74 { 75 __be32 *p; 76 77 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE); 78 if (unlikely(!p)) 79 return -ENOBUFS; 80 memcpy(devid, p, NFS4_DEVICEID4_SIZE); 81 nfs4_print_deviceid(devid); 82 return 0; 83 } 84 85 static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh) 86 { 87 __be32 *p; 88 89 p = xdr_inline_decode(xdr, 4); 90 if (unlikely(!p)) 91 return -ENOBUFS; 92 fh->size = be32_to_cpup(p++); 93 if (fh->size > sizeof(struct nfs_fh)) { 94 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n", 95 fh->size); 96 return -EOVERFLOW; 97 } 98 /* fh.data */ 99 p = xdr_inline_decode(xdr, fh->size); 100 if (unlikely(!p)) 101 return -ENOBUFS; 102 memcpy(&fh->data, p, fh->size); 103 dprintk("%s: fh len %d\n", __func__, fh->size); 104 105 return 0; 106 } 107 108 /* 109 * Currently only stringified uids and gids are accepted. 110 * I.e., kerberos is not supported to the DSes, so no pricipals. 111 * 112 * That means that one common function will suffice, but when 113 * principals are added, this should be split to accomodate 114 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid(). 115 */ 116 static int 117 decode_name(struct xdr_stream *xdr, u32 *id) 118 { 119 __be32 *p; 120 int len; 121 122 /* opaque_length(4)*/ 123 p = xdr_inline_decode(xdr, 4); 124 if (unlikely(!p)) 125 return -ENOBUFS; 126 len = be32_to_cpup(p++); 127 if (len < 0) 128 return -EINVAL; 129 130 dprintk("%s: len %u\n", __func__, len); 131 132 /* opaque body */ 133 p = xdr_inline_decode(xdr, len); 134 if (unlikely(!p)) 135 return -ENOBUFS; 136 137 if (!nfs_map_string_to_numeric((char *)p, len, id)) 138 return -EINVAL; 139 140 return 0; 141 } 142 143 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1, 144 const struct nfs4_ff_layout_mirror *m2) 145 { 146 int i, j; 147 148 if (m1->fh_versions_cnt != m2->fh_versions_cnt) 149 return false; 150 for (i = 0; i < m1->fh_versions_cnt; i++) { 151 bool found_fh = false; 152 for (j = 0; j < m2->fh_versions_cnt; j++) { 153 if (nfs_compare_fh(&m1->fh_versions[i], 154 &m2->fh_versions[j]) == 0) { 155 found_fh = true; 156 break; 157 } 158 } 159 if (!found_fh) 160 return false; 161 } 162 return true; 163 } 164 165 static struct nfs4_ff_layout_mirror * 166 ff_layout_add_mirror(struct pnfs_layout_hdr *lo, 167 struct nfs4_ff_layout_mirror *mirror) 168 { 169 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); 170 struct nfs4_ff_layout_mirror *pos; 171 struct inode *inode = lo->plh_inode; 172 173 spin_lock(&inode->i_lock); 174 list_for_each_entry(pos, &ff_layout->mirrors, mirrors) { 175 if (mirror->mirror_ds != pos->mirror_ds) 176 continue; 177 if (!ff_mirror_match_fh(mirror, pos)) 178 continue; 179 if (atomic_inc_not_zero(&pos->ref)) { 180 spin_unlock(&inode->i_lock); 181 return pos; 182 } 183 } 184 list_add(&mirror->mirrors, &ff_layout->mirrors); 185 mirror->layout = lo; 186 spin_unlock(&inode->i_lock); 187 return mirror; 188 } 189 190 static void 191 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror) 192 { 193 struct inode *inode; 194 if (mirror->layout == NULL) 195 return; 196 inode = mirror->layout->plh_inode; 197 spin_lock(&inode->i_lock); 198 list_del(&mirror->mirrors); 199 spin_unlock(&inode->i_lock); 200 mirror->layout = NULL; 201 } 202 203 static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags) 204 { 205 struct nfs4_ff_layout_mirror *mirror; 206 207 mirror = kzalloc(sizeof(*mirror), gfp_flags); 208 if (mirror != NULL) { 209 spin_lock_init(&mirror->lock); 210 atomic_set(&mirror->ref, 1); 211 INIT_LIST_HEAD(&mirror->mirrors); 212 } 213 return mirror; 214 } 215 216 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror) 217 { 218 struct rpc_cred *cred; 219 220 ff_layout_remove_mirror(mirror); 221 kfree(mirror->fh_versions); 222 cred = rcu_access_pointer(mirror->ro_cred); 223 if (cred) 224 put_rpccred(cred); 225 cred = rcu_access_pointer(mirror->rw_cred); 226 if (cred) 227 put_rpccred(cred); 228 nfs4_ff_layout_put_deviceid(mirror->mirror_ds); 229 kfree(mirror); 230 } 231 232 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror) 233 { 234 if (mirror != NULL && atomic_dec_and_test(&mirror->ref)) 235 ff_layout_free_mirror(mirror); 236 } 237 238 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) 239 { 240 int i; 241 242 if (fls->mirror_array) { 243 for (i = 0; i < fls->mirror_array_cnt; i++) { 244 /* normally mirror_ds is freed in 245 * .free_deviceid_node but we still do it here 246 * for .alloc_lseg error path */ 247 ff_layout_put_mirror(fls->mirror_array[i]); 248 } 249 kfree(fls->mirror_array); 250 fls->mirror_array = NULL; 251 } 252 } 253 254 static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr) 255 { 256 int ret = 0; 257 258 dprintk("--> %s\n", __func__); 259 260 /* FIXME: remove this check when layout segment support is added */ 261 if (lgr->range.offset != 0 || 262 lgr->range.length != NFS4_MAX_UINT64) { 263 dprintk("%s Only whole file layouts supported. Use MDS i/o\n", 264 __func__); 265 ret = -EINVAL; 266 } 267 268 dprintk("--> %s returns %d\n", __func__, ret); 269 return ret; 270 } 271 272 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) 273 { 274 if (fls) { 275 ff_layout_free_mirror_array(fls); 276 kfree(fls); 277 } 278 } 279 280 static bool 281 ff_lseg_range_is_after(const struct pnfs_layout_range *l1, 282 const struct pnfs_layout_range *l2) 283 { 284 u64 end1, end2; 285 286 if (l1->iomode != l2->iomode) 287 return l1->iomode != IOMODE_READ; 288 end1 = pnfs_calc_offset_end(l1->offset, l1->length); 289 end2 = pnfs_calc_offset_end(l2->offset, l2->length); 290 if (end1 < l2->offset) 291 return false; 292 if (end2 < l1->offset) 293 return true; 294 return l2->offset <= l1->offset; 295 } 296 297 static bool 298 ff_lseg_merge(struct pnfs_layout_segment *new, 299 struct pnfs_layout_segment *old) 300 { 301 u64 new_end, old_end; 302 303 if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags)) 304 return false; 305 if (new->pls_range.iomode != old->pls_range.iomode) 306 return false; 307 old_end = pnfs_calc_offset_end(old->pls_range.offset, 308 old->pls_range.length); 309 if (old_end < new->pls_range.offset) 310 return false; 311 new_end = pnfs_calc_offset_end(new->pls_range.offset, 312 new->pls_range.length); 313 if (new_end < old->pls_range.offset) 314 return false; 315 316 /* Mergeable: copy info from 'old' to 'new' */ 317 if (new_end < old_end) 318 new_end = old_end; 319 if (new->pls_range.offset < old->pls_range.offset) 320 new->pls_range.offset = old->pls_range.offset; 321 new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset, 322 new_end); 323 if (test_bit(NFS_LSEG_ROC, &old->pls_flags)) 324 set_bit(NFS_LSEG_ROC, &new->pls_flags); 325 return true; 326 } 327 328 static void 329 ff_layout_add_lseg(struct pnfs_layout_hdr *lo, 330 struct pnfs_layout_segment *lseg, 331 struct list_head *free_me) 332 { 333 pnfs_generic_layout_insert_lseg(lo, lseg, 334 ff_lseg_range_is_after, 335 ff_lseg_merge, 336 free_me); 337 } 338 339 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) 340 { 341 int i, j; 342 343 for (i = 0; i < fls->mirror_array_cnt - 1; i++) { 344 for (j = i + 1; j < fls->mirror_array_cnt; j++) 345 if (fls->mirror_array[i]->efficiency < 346 fls->mirror_array[j]->efficiency) 347 swap(fls->mirror_array[i], 348 fls->mirror_array[j]); 349 } 350 } 351 352 static void ff_layout_mark_devices_valid(struct nfs4_ff_layout_segment *fls) 353 { 354 struct nfs4_deviceid_node *node; 355 int i; 356 357 if (!(fls->flags & FF_FLAGS_NO_IO_THRU_MDS)) 358 return; 359 for (i = 0; i < fls->mirror_array_cnt; i++) { 360 node = &fls->mirror_array[i]->mirror_ds->id_node; 361 clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); 362 } 363 } 364 365 static struct pnfs_layout_segment * 366 ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, 367 struct nfs4_layoutget_res *lgr, 368 gfp_t gfp_flags) 369 { 370 struct pnfs_layout_segment *ret; 371 struct nfs4_ff_layout_segment *fls = NULL; 372 struct xdr_stream stream; 373 struct xdr_buf buf; 374 struct page *scratch; 375 u64 stripe_unit; 376 u32 mirror_array_cnt; 377 __be32 *p; 378 int i, rc; 379 380 dprintk("--> %s\n", __func__); 381 scratch = alloc_page(gfp_flags); 382 if (!scratch) 383 return ERR_PTR(-ENOMEM); 384 385 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, 386 lgr->layoutp->len); 387 xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); 388 389 /* stripe unit and mirror_array_cnt */ 390 rc = -EIO; 391 p = xdr_inline_decode(&stream, 8 + 4); 392 if (!p) 393 goto out_err_free; 394 395 p = xdr_decode_hyper(p, &stripe_unit); 396 mirror_array_cnt = be32_to_cpup(p++); 397 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, 398 stripe_unit, mirror_array_cnt); 399 400 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || 401 mirror_array_cnt == 0) 402 goto out_err_free; 403 404 rc = -ENOMEM; 405 fls = kzalloc(sizeof(*fls), gfp_flags); 406 if (!fls) 407 goto out_err_free; 408 409 fls->mirror_array_cnt = mirror_array_cnt; 410 fls->stripe_unit = stripe_unit; 411 fls->mirror_array = kcalloc(fls->mirror_array_cnt, 412 sizeof(fls->mirror_array[0]), gfp_flags); 413 if (fls->mirror_array == NULL) 414 goto out_err_free; 415 416 for (i = 0; i < fls->mirror_array_cnt; i++) { 417 struct nfs4_ff_layout_mirror *mirror; 418 struct nfs4_deviceid devid; 419 struct nfs4_deviceid_node *idnode; 420 struct auth_cred acred = { .group_info = ff_zero_group }; 421 struct rpc_cred __rcu *cred; 422 u32 ds_count, fh_count, id; 423 int j; 424 425 rc = -EIO; 426 p = xdr_inline_decode(&stream, 4); 427 if (!p) 428 goto out_err_free; 429 ds_count = be32_to_cpup(p); 430 431 /* FIXME: allow for striping? */ 432 if (ds_count != 1) 433 goto out_err_free; 434 435 fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags); 436 if (fls->mirror_array[i] == NULL) { 437 rc = -ENOMEM; 438 goto out_err_free; 439 } 440 441 fls->mirror_array[i]->ds_count = ds_count; 442 443 /* deviceid */ 444 rc = decode_deviceid(&stream, &devid); 445 if (rc) 446 goto out_err_free; 447 448 idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode), 449 &devid, lh->plh_lc_cred, 450 gfp_flags); 451 /* 452 * upon success, mirror_ds is allocated by previous 453 * getdeviceinfo, or newly by .alloc_deviceid_node 454 * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure 455 */ 456 if (idnode) 457 fls->mirror_array[i]->mirror_ds = 458 FF_LAYOUT_MIRROR_DS(idnode); 459 else 460 goto out_err_free; 461 462 /* efficiency */ 463 rc = -EIO; 464 p = xdr_inline_decode(&stream, 4); 465 if (!p) 466 goto out_err_free; 467 fls->mirror_array[i]->efficiency = be32_to_cpup(p); 468 469 /* stateid */ 470 rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid); 471 if (rc) 472 goto out_err_free; 473 474 /* fh */ 475 p = xdr_inline_decode(&stream, 4); 476 if (!p) 477 goto out_err_free; 478 fh_count = be32_to_cpup(p); 479 480 fls->mirror_array[i]->fh_versions = 481 kzalloc(fh_count * sizeof(struct nfs_fh), 482 gfp_flags); 483 if (fls->mirror_array[i]->fh_versions == NULL) { 484 rc = -ENOMEM; 485 goto out_err_free; 486 } 487 488 for (j = 0; j < fh_count; j++) { 489 rc = decode_nfs_fh(&stream, 490 &fls->mirror_array[i]->fh_versions[j]); 491 if (rc) 492 goto out_err_free; 493 } 494 495 fls->mirror_array[i]->fh_versions_cnt = fh_count; 496 497 /* user */ 498 rc = decode_name(&stream, &id); 499 if (rc) 500 goto out_err_free; 501 502 acred.uid = make_kuid(&init_user_ns, id); 503 504 /* group */ 505 rc = decode_name(&stream, &id); 506 if (rc) 507 goto out_err_free; 508 509 acred.gid = make_kgid(&init_user_ns, id); 510 511 /* find the cred for it */ 512 rcu_assign_pointer(cred, rpc_lookup_generic_cred(&acred, 0, gfp_flags)); 513 if (IS_ERR(cred)) { 514 rc = PTR_ERR(cred); 515 goto out_err_free; 516 } 517 518 if (lgr->range.iomode == IOMODE_READ) 519 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); 520 else 521 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); 522 523 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); 524 if (mirror != fls->mirror_array[i]) { 525 /* swap cred ptrs so free_mirror will clean up old */ 526 if (lgr->range.iomode == IOMODE_READ) { 527 cred = xchg(&mirror->ro_cred, cred); 528 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); 529 } else { 530 cred = xchg(&mirror->rw_cred, cred); 531 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); 532 } 533 ff_layout_free_mirror(fls->mirror_array[i]); 534 fls->mirror_array[i] = mirror; 535 } 536 537 dprintk("%s: iomode %s uid %u gid %u\n", __func__, 538 lgr->range.iomode == IOMODE_READ ? "READ" : "RW", 539 from_kuid(&init_user_ns, acred.uid), 540 from_kgid(&init_user_ns, acred.gid)); 541 } 542 543 p = xdr_inline_decode(&stream, 4); 544 if (!p) 545 goto out_sort_mirrors; 546 fls->flags = be32_to_cpup(p); 547 548 p = xdr_inline_decode(&stream, 4); 549 if (!p) 550 goto out_sort_mirrors; 551 for (i=0; i < fls->mirror_array_cnt; i++) 552 fls->mirror_array[i]->report_interval = be32_to_cpup(p); 553 554 out_sort_mirrors: 555 ff_layout_sort_mirrors(fls); 556 rc = ff_layout_check_layout(lgr); 557 if (rc) 558 goto out_err_free; 559 ff_layout_mark_devices_valid(fls); 560 561 ret = &fls->generic_hdr; 562 dprintk("<-- %s (success)\n", __func__); 563 out_free_page: 564 __free_page(scratch); 565 return ret; 566 out_err_free: 567 _ff_layout_free_lseg(fls); 568 ret = ERR_PTR(rc); 569 dprintk("<-- %s (%d)\n", __func__, rc); 570 goto out_free_page; 571 } 572 573 static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout) 574 { 575 struct pnfs_layout_segment *lseg; 576 577 list_for_each_entry(lseg, &layout->plh_segs, pls_list) 578 if (lseg->pls_range.iomode == IOMODE_RW) 579 return true; 580 581 return false; 582 } 583 584 static void 585 ff_layout_free_lseg(struct pnfs_layout_segment *lseg) 586 { 587 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 588 589 dprintk("--> %s\n", __func__); 590 591 if (lseg->pls_range.iomode == IOMODE_RW) { 592 struct nfs4_flexfile_layout *ffl; 593 struct inode *inode; 594 595 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); 596 inode = ffl->generic_hdr.plh_inode; 597 spin_lock(&inode->i_lock); 598 if (!ff_layout_has_rw_segments(lseg->pls_layout)) { 599 ffl->commit_info.nbuckets = 0; 600 kfree(ffl->commit_info.buckets); 601 ffl->commit_info.buckets = NULL; 602 } 603 spin_unlock(&inode->i_lock); 604 } 605 _ff_layout_free_lseg(fls); 606 } 607 608 /* Return 1 until we have multiple lsegs support */ 609 static int 610 ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls) 611 { 612 return 1; 613 } 614 615 static void 616 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) 617 { 618 /* first IO request? */ 619 if (atomic_inc_return(&timer->n_ops) == 1) { 620 timer->start_time = now; 621 } 622 } 623 624 static ktime_t 625 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) 626 { 627 ktime_t start; 628 629 if (atomic_dec_return(&timer->n_ops) < 0) 630 WARN_ON_ONCE(1); 631 632 start = timer->start_time; 633 timer->start_time = now; 634 return ktime_sub(now, start); 635 } 636 637 static bool 638 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, 639 struct nfs4_ff_layoutstat *layoutstat, 640 ktime_t now) 641 { 642 static const ktime_t notime = {0}; 643 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; 644 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout); 645 646 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); 647 if (ktime_equal(mirror->start_time, notime)) 648 mirror->start_time = now; 649 if (mirror->report_interval != 0) 650 report_interval = (s64)mirror->report_interval * 1000LL; 651 else if (layoutstats_timer != 0) 652 report_interval = (s64)layoutstats_timer * 1000LL; 653 if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >= 654 report_interval) { 655 ffl->last_report_time = now; 656 return true; 657 } 658 659 return false; 660 } 661 662 static void 663 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, 664 __u64 requested) 665 { 666 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; 667 668 iostat->ops_requested++; 669 iostat->bytes_requested += requested; 670 } 671 672 static void 673 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, 674 __u64 requested, 675 __u64 completed, 676 ktime_t time_completed, 677 ktime_t time_started) 678 { 679 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; 680 ktime_t completion_time = ktime_sub(time_completed, time_started); 681 ktime_t timer; 682 683 iostat->ops_completed++; 684 iostat->bytes_completed += completed; 685 iostat->bytes_not_delivered += requested - completed; 686 687 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); 688 iostat->total_busy_time = 689 ktime_add(iostat->total_busy_time, timer); 690 iostat->aggregate_completion_time = 691 ktime_add(iostat->aggregate_completion_time, 692 completion_time); 693 } 694 695 static void 696 nfs4_ff_layout_stat_io_start_read(struct inode *inode, 697 struct nfs4_ff_layout_mirror *mirror, 698 __u64 requested, ktime_t now) 699 { 700 bool report; 701 702 spin_lock(&mirror->lock); 703 report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now); 704 nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); 705 spin_unlock(&mirror->lock); 706 707 if (report) 708 pnfs_report_layoutstat(inode, GFP_KERNEL); 709 } 710 711 static void 712 nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, 713 struct nfs4_ff_layout_mirror *mirror, 714 __u64 requested, 715 __u64 completed) 716 { 717 spin_lock(&mirror->lock); 718 nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat, 719 requested, completed, 720 ktime_get(), task->tk_start); 721 spin_unlock(&mirror->lock); 722 } 723 724 static void 725 nfs4_ff_layout_stat_io_start_write(struct inode *inode, 726 struct nfs4_ff_layout_mirror *mirror, 727 __u64 requested, ktime_t now) 728 { 729 bool report; 730 731 spin_lock(&mirror->lock); 732 report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now); 733 nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); 734 spin_unlock(&mirror->lock); 735 736 if (report) 737 pnfs_report_layoutstat(inode, GFP_NOIO); 738 } 739 740 static void 741 nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, 742 struct nfs4_ff_layout_mirror *mirror, 743 __u64 requested, 744 __u64 completed, 745 enum nfs3_stable_how committed) 746 { 747 if (committed == NFS_UNSTABLE) 748 requested = completed = 0; 749 750 spin_lock(&mirror->lock); 751 nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat, 752 requested, completed, ktime_get(), task->tk_start); 753 spin_unlock(&mirror->lock); 754 } 755 756 static int 757 ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg, 758 struct nfs_commit_info *cinfo, 759 gfp_t gfp_flags) 760 { 761 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 762 struct pnfs_commit_bucket *buckets; 763 int size; 764 765 if (cinfo->ds->nbuckets != 0) { 766 /* This assumes there is only one RW lseg per file. 767 * To support multiple lseg per file, we need to 768 * change struct pnfs_commit_bucket to allow dynamic 769 * increasing nbuckets. 770 */ 771 return 0; 772 } 773 774 size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg); 775 776 buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), 777 gfp_flags); 778 if (!buckets) 779 return -ENOMEM; 780 else { 781 int i; 782 783 spin_lock(&cinfo->inode->i_lock); 784 if (cinfo->ds->nbuckets != 0) 785 kfree(buckets); 786 else { 787 cinfo->ds->buckets = buckets; 788 cinfo->ds->nbuckets = size; 789 for (i = 0; i < size; i++) { 790 INIT_LIST_HEAD(&buckets[i].written); 791 INIT_LIST_HEAD(&buckets[i].committing); 792 /* mark direct verifier as unset */ 793 buckets[i].direct_verf.committed = 794 NFS_INVALID_STABLE_HOW; 795 } 796 } 797 spin_unlock(&cinfo->inode->i_lock); 798 return 0; 799 } 800 } 801 802 static struct nfs4_pnfs_ds * 803 ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg, 804 int start_idx, 805 int *best_idx) 806 { 807 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 808 struct nfs4_pnfs_ds *ds; 809 bool fail_return = false; 810 int idx; 811 812 /* mirrors are sorted by efficiency */ 813 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { 814 if (idx+1 == fls->mirror_array_cnt) 815 fail_return = true; 816 ds = nfs4_ff_layout_prepare_ds(lseg, idx, fail_return); 817 if (ds) { 818 *best_idx = idx; 819 return ds; 820 } 821 } 822 823 return NULL; 824 } 825 826 static void 827 ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio, 828 struct nfs_page *req, 829 bool strict_iomode) 830 { 831 retry_strict: 832 pnfs_put_lseg(pgio->pg_lseg); 833 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, 834 req->wb_context, 835 0, 836 NFS4_MAX_UINT64, 837 IOMODE_READ, 838 strict_iomode, 839 GFP_KERNEL); 840 if (IS_ERR(pgio->pg_lseg)) { 841 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 842 pgio->pg_lseg = NULL; 843 } 844 845 /* If we don't have checking, do get a IOMODE_RW 846 * segment, and the server wants to avoid READs 847 * there, then retry! 848 */ 849 if (pgio->pg_lseg && !strict_iomode && 850 ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { 851 strict_iomode = true; 852 goto retry_strict; 853 } 854 } 855 856 static void 857 ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, 858 struct nfs_page *req) 859 { 860 struct nfs_pgio_mirror *pgm; 861 struct nfs4_ff_layout_mirror *mirror; 862 struct nfs4_pnfs_ds *ds; 863 int ds_idx; 864 865 retry: 866 /* Use full layout for now */ 867 if (!pgio->pg_lseg) 868 ff_layout_pg_get_read(pgio, req, false); 869 else if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) 870 ff_layout_pg_get_read(pgio, req, true); 871 872 /* If no lseg, fall back to read through mds */ 873 if (pgio->pg_lseg == NULL) 874 goto out_mds; 875 876 ds = ff_layout_choose_best_ds_for_read(pgio->pg_lseg, 0, &ds_idx); 877 if (!ds) { 878 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) 879 goto out_mds; 880 pnfs_put_lseg(pgio->pg_lseg); 881 pgio->pg_lseg = NULL; 882 /* Sleep for 1 second before retrying */ 883 ssleep(1); 884 goto retry; 885 } 886 887 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); 888 889 pgio->pg_mirror_idx = ds_idx; 890 891 /* read always uses only one mirror - idx 0 for pgio layer */ 892 pgm = &pgio->pg_mirrors[0]; 893 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; 894 895 return; 896 out_mds: 897 pnfs_put_lseg(pgio->pg_lseg); 898 pgio->pg_lseg = NULL; 899 nfs_pageio_reset_read_mds(pgio); 900 } 901 902 static void 903 ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, 904 struct nfs_page *req) 905 { 906 struct nfs4_ff_layout_mirror *mirror; 907 struct nfs_pgio_mirror *pgm; 908 struct nfs_commit_info cinfo; 909 struct nfs4_pnfs_ds *ds; 910 int i; 911 int status; 912 913 retry: 914 if (!pgio->pg_lseg) { 915 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, 916 req->wb_context, 917 0, 918 NFS4_MAX_UINT64, 919 IOMODE_RW, 920 false, 921 GFP_NOFS); 922 if (IS_ERR(pgio->pg_lseg)) { 923 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 924 pgio->pg_lseg = NULL; 925 return; 926 } 927 } 928 /* If no lseg, fall back to write through mds */ 929 if (pgio->pg_lseg == NULL) 930 goto out_mds; 931 932 nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); 933 status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); 934 if (status < 0) 935 goto out_mds; 936 937 /* Use a direct mapping of ds_idx to pgio mirror_idx */ 938 if (WARN_ON_ONCE(pgio->pg_mirror_count != 939 FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))) 940 goto out_mds; 941 942 for (i = 0; i < pgio->pg_mirror_count; i++) { 943 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true); 944 if (!ds) { 945 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) 946 goto out_mds; 947 pnfs_put_lseg(pgio->pg_lseg); 948 pgio->pg_lseg = NULL; 949 /* Sleep for 1 second before retrying */ 950 ssleep(1); 951 goto retry; 952 } 953 pgm = &pgio->pg_mirrors[i]; 954 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); 955 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; 956 } 957 958 return; 959 960 out_mds: 961 pnfs_put_lseg(pgio->pg_lseg); 962 pgio->pg_lseg = NULL; 963 nfs_pageio_reset_write_mds(pgio); 964 } 965 966 static unsigned int 967 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, 968 struct nfs_page *req) 969 { 970 if (!pgio->pg_lseg) { 971 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, 972 req->wb_context, 973 0, 974 NFS4_MAX_UINT64, 975 IOMODE_RW, 976 false, 977 GFP_NOFS); 978 if (IS_ERR(pgio->pg_lseg)) { 979 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 980 pgio->pg_lseg = NULL; 981 goto out; 982 } 983 } 984 if (pgio->pg_lseg) 985 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); 986 987 /* no lseg means that pnfs is not in use, so no mirroring here */ 988 nfs_pageio_reset_write_mds(pgio); 989 out: 990 return 1; 991 } 992 993 static const struct nfs_pageio_ops ff_layout_pg_read_ops = { 994 .pg_init = ff_layout_pg_init_read, 995 .pg_test = pnfs_generic_pg_test, 996 .pg_doio = pnfs_generic_pg_readpages, 997 .pg_cleanup = pnfs_generic_pg_cleanup, 998 }; 999 1000 static const struct nfs_pageio_ops ff_layout_pg_write_ops = { 1001 .pg_init = ff_layout_pg_init_write, 1002 .pg_test = pnfs_generic_pg_test, 1003 .pg_doio = pnfs_generic_pg_writepages, 1004 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, 1005 .pg_cleanup = pnfs_generic_pg_cleanup, 1006 }; 1007 1008 static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) 1009 { 1010 struct rpc_task *task = &hdr->task; 1011 1012 pnfs_layoutcommit_inode(hdr->inode, false); 1013 1014 if (retry_pnfs) { 1015 dprintk("%s Reset task %5u for i/o through pNFS " 1016 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1017 hdr->task.tk_pid, 1018 hdr->inode->i_sb->s_id, 1019 (unsigned long long)NFS_FILEID(hdr->inode), 1020 hdr->args.count, 1021 (unsigned long long)hdr->args.offset); 1022 1023 hdr->completion_ops->reschedule_io(hdr); 1024 return; 1025 } 1026 1027 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { 1028 dprintk("%s Reset task %5u for i/o through MDS " 1029 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1030 hdr->task.tk_pid, 1031 hdr->inode->i_sb->s_id, 1032 (unsigned long long)NFS_FILEID(hdr->inode), 1033 hdr->args.count, 1034 (unsigned long long)hdr->args.offset); 1035 1036 task->tk_status = pnfs_write_done_resend_to_mds(hdr); 1037 } 1038 } 1039 1040 static void ff_layout_reset_read(struct nfs_pgio_header *hdr) 1041 { 1042 struct rpc_task *task = &hdr->task; 1043 1044 pnfs_layoutcommit_inode(hdr->inode, false); 1045 1046 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { 1047 dprintk("%s Reset task %5u for i/o through MDS " 1048 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1049 hdr->task.tk_pid, 1050 hdr->inode->i_sb->s_id, 1051 (unsigned long long)NFS_FILEID(hdr->inode), 1052 hdr->args.count, 1053 (unsigned long long)hdr->args.offset); 1054 1055 task->tk_status = pnfs_read_done_resend_to_mds(hdr); 1056 } 1057 } 1058 1059 static int ff_layout_async_handle_error_v4(struct rpc_task *task, 1060 struct nfs4_state *state, 1061 struct nfs_client *clp, 1062 struct pnfs_layout_segment *lseg, 1063 int idx) 1064 { 1065 struct pnfs_layout_hdr *lo = lseg->pls_layout; 1066 struct inode *inode = lo->plh_inode; 1067 struct nfs_server *mds_server = NFS_SERVER(inode); 1068 1069 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); 1070 struct nfs_client *mds_client = mds_server->nfs_client; 1071 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; 1072 1073 if (task->tk_status >= 0) 1074 return 0; 1075 1076 switch (task->tk_status) { 1077 /* MDS state errors */ 1078 case -NFS4ERR_DELEG_REVOKED: 1079 case -NFS4ERR_ADMIN_REVOKED: 1080 case -NFS4ERR_BAD_STATEID: 1081 if (state == NULL) 1082 break; 1083 nfs_remove_bad_delegation(state->inode); 1084 case -NFS4ERR_OPENMODE: 1085 if (state == NULL) 1086 break; 1087 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) 1088 goto out_bad_stateid; 1089 goto wait_on_recovery; 1090 case -NFS4ERR_EXPIRED: 1091 if (state != NULL) { 1092 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) 1093 goto out_bad_stateid; 1094 } 1095 nfs4_schedule_lease_recovery(mds_client); 1096 goto wait_on_recovery; 1097 /* DS session errors */ 1098 case -NFS4ERR_BADSESSION: 1099 case -NFS4ERR_BADSLOT: 1100 case -NFS4ERR_BAD_HIGH_SLOT: 1101 case -NFS4ERR_DEADSESSION: 1102 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1103 case -NFS4ERR_SEQ_FALSE_RETRY: 1104 case -NFS4ERR_SEQ_MISORDERED: 1105 dprintk("%s ERROR %d, Reset session. Exchangeid " 1106 "flags 0x%x\n", __func__, task->tk_status, 1107 clp->cl_exchange_flags); 1108 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); 1109 break; 1110 case -NFS4ERR_DELAY: 1111 case -NFS4ERR_GRACE: 1112 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); 1113 break; 1114 case -NFS4ERR_RETRY_UNCACHED_REP: 1115 break; 1116 /* Invalidate Layout errors */ 1117 case -NFS4ERR_PNFS_NO_LAYOUT: 1118 case -ESTALE: /* mapped NFS4ERR_STALE */ 1119 case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ 1120 case -EISDIR: /* mapped NFS4ERR_ISDIR */ 1121 case -NFS4ERR_FHEXPIRED: 1122 case -NFS4ERR_WRONG_TYPE: 1123 dprintk("%s Invalid layout error %d\n", __func__, 1124 task->tk_status); 1125 /* 1126 * Destroy layout so new i/o will get a new layout. 1127 * Layout will not be destroyed until all current lseg 1128 * references are put. Mark layout as invalid to resend failed 1129 * i/o and all i/o waiting on the slot table to the MDS until 1130 * layout is destroyed and a new valid layout is obtained. 1131 */ 1132 pnfs_destroy_layout(NFS_I(inode)); 1133 rpc_wake_up(&tbl->slot_tbl_waitq); 1134 goto reset; 1135 /* RPC connection errors */ 1136 case -ECONNREFUSED: 1137 case -EHOSTDOWN: 1138 case -EHOSTUNREACH: 1139 case -ENETUNREACH: 1140 case -EIO: 1141 case -ETIMEDOUT: 1142 case -EPIPE: 1143 dprintk("%s DS connection error %d\n", __func__, 1144 task->tk_status); 1145 nfs4_mark_deviceid_unavailable(devid); 1146 rpc_wake_up(&tbl->slot_tbl_waitq); 1147 /* fall through */ 1148 default: 1149 if (ff_layout_avoid_mds_available_ds(lseg)) 1150 return -NFS4ERR_RESET_TO_PNFS; 1151 reset: 1152 dprintk("%s Retry through MDS. Error %d\n", __func__, 1153 task->tk_status); 1154 return -NFS4ERR_RESET_TO_MDS; 1155 } 1156 out: 1157 task->tk_status = 0; 1158 return -EAGAIN; 1159 out_bad_stateid: 1160 task->tk_status = -EIO; 1161 return 0; 1162 wait_on_recovery: 1163 rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); 1164 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) 1165 rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); 1166 goto out; 1167 } 1168 1169 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ 1170 static int ff_layout_async_handle_error_v3(struct rpc_task *task, 1171 struct pnfs_layout_segment *lseg, 1172 int idx) 1173 { 1174 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); 1175 1176 if (task->tk_status >= 0) 1177 return 0; 1178 1179 switch (task->tk_status) { 1180 /* File access problems. Don't mark the device as unavailable */ 1181 case -EACCES: 1182 case -ESTALE: 1183 case -EISDIR: 1184 case -EBADHANDLE: 1185 case -ELOOP: 1186 case -ENOSPC: 1187 break; 1188 case -EJUKEBOX: 1189 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1190 goto out_retry; 1191 default: 1192 dprintk("%s DS connection error %d\n", __func__, 1193 task->tk_status); 1194 nfs4_mark_deviceid_unavailable(devid); 1195 } 1196 /* FIXME: Need to prevent infinite looping here. */ 1197 return -NFS4ERR_RESET_TO_PNFS; 1198 out_retry: 1199 task->tk_status = 0; 1200 rpc_restart_call_prepare(task); 1201 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 1202 return -EAGAIN; 1203 } 1204 1205 static int ff_layout_async_handle_error(struct rpc_task *task, 1206 struct nfs4_state *state, 1207 struct nfs_client *clp, 1208 struct pnfs_layout_segment *lseg, 1209 int idx) 1210 { 1211 int vers = clp->cl_nfs_mod->rpc_vers->number; 1212 1213 switch (vers) { 1214 case 3: 1215 return ff_layout_async_handle_error_v3(task, lseg, idx); 1216 case 4: 1217 return ff_layout_async_handle_error_v4(task, state, clp, 1218 lseg, idx); 1219 default: 1220 /* should never happen */ 1221 WARN_ON_ONCE(1); 1222 return 0; 1223 } 1224 } 1225 1226 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, 1227 int idx, u64 offset, u64 length, 1228 u32 status, int opnum, int error) 1229 { 1230 struct nfs4_ff_layout_mirror *mirror; 1231 int err; 1232 1233 if (status == 0) { 1234 switch (error) { 1235 case -ETIMEDOUT: 1236 case -EPFNOSUPPORT: 1237 case -EPROTONOSUPPORT: 1238 case -EOPNOTSUPP: 1239 case -ECONNREFUSED: 1240 case -ECONNRESET: 1241 case -EHOSTDOWN: 1242 case -EHOSTUNREACH: 1243 case -ENETUNREACH: 1244 case -EADDRINUSE: 1245 case -ENOBUFS: 1246 case -EPIPE: 1247 case -EPERM: 1248 status = NFS4ERR_NXIO; 1249 break; 1250 case -EACCES: 1251 status = NFS4ERR_ACCESS; 1252 break; 1253 default: 1254 return; 1255 } 1256 } 1257 1258 switch (status) { 1259 case NFS4ERR_DELAY: 1260 case NFS4ERR_GRACE: 1261 return; 1262 default: 1263 break; 1264 } 1265 1266 mirror = FF_LAYOUT_COMP(lseg, idx); 1267 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), 1268 mirror, offset, length, status, opnum, 1269 GFP_NOIO); 1270 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, lseg); 1271 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); 1272 } 1273 1274 /* NFS_PROTO call done callback routines */ 1275 static int ff_layout_read_done_cb(struct rpc_task *task, 1276 struct nfs_pgio_header *hdr) 1277 { 1278 int err; 1279 1280 trace_nfs4_pnfs_read(hdr, task->tk_status); 1281 if (task->tk_status < 0) 1282 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, 1283 hdr->args.offset, hdr->args.count, 1284 hdr->res.op_status, OP_READ, 1285 task->tk_status); 1286 err = ff_layout_async_handle_error(task, hdr->args.context->state, 1287 hdr->ds_clp, hdr->lseg, 1288 hdr->pgio_mirror_idx); 1289 1290 switch (err) { 1291 case -NFS4ERR_RESET_TO_PNFS: 1292 if (ff_layout_choose_best_ds_for_read(hdr->lseg, 1293 hdr->pgio_mirror_idx + 1, 1294 &hdr->pgio_mirror_idx)) 1295 goto out_eagain; 1296 pnfs_read_resend_pnfs(hdr); 1297 return task->tk_status; 1298 case -NFS4ERR_RESET_TO_MDS: 1299 ff_layout_reset_read(hdr); 1300 return task->tk_status; 1301 case -EAGAIN: 1302 goto out_eagain; 1303 } 1304 1305 return 0; 1306 out_eagain: 1307 rpc_restart_call_prepare(task); 1308 return -EAGAIN; 1309 } 1310 1311 static bool 1312 ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) 1313 { 1314 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); 1315 } 1316 1317 /* 1318 * We reference the rpc_cred of the first WRITE that triggers the need for 1319 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. 1320 * rfc5661 is not clear about which credential should be used. 1321 * 1322 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so 1323 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 1324 * we always send layoutcommit after DS writes. 1325 */ 1326 static void 1327 ff_layout_set_layoutcommit(struct inode *inode, 1328 struct pnfs_layout_segment *lseg, 1329 loff_t end_offset) 1330 { 1331 if (!ff_layout_need_layoutcommit(lseg)) 1332 return; 1333 1334 pnfs_set_layoutcommit(inode, lseg, end_offset); 1335 dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino, 1336 (unsigned long long) NFS_I(inode)->layout->plh_lwb); 1337 } 1338 1339 static bool 1340 ff_layout_device_unavailable(struct pnfs_layout_segment *lseg, int idx) 1341 { 1342 /* No mirroring for now */ 1343 struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx); 1344 1345 return ff_layout_test_devid_unavailable(node); 1346 } 1347 1348 static void ff_layout_read_record_layoutstats_start(struct rpc_task *task, 1349 struct nfs_pgio_header *hdr) 1350 { 1351 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) 1352 return; 1353 nfs4_ff_layout_stat_io_start_read(hdr->inode, 1354 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1355 hdr->args.count, 1356 task->tk_start); 1357 } 1358 1359 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, 1360 struct nfs_pgio_header *hdr) 1361 { 1362 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) 1363 return; 1364 nfs4_ff_layout_stat_io_end_read(task, 1365 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1366 hdr->args.count, 1367 hdr->res.count); 1368 } 1369 1370 static int ff_layout_read_prepare_common(struct rpc_task *task, 1371 struct nfs_pgio_header *hdr) 1372 { 1373 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { 1374 rpc_exit(task, -EIO); 1375 return -EIO; 1376 } 1377 if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) { 1378 rpc_exit(task, -EHOSTDOWN); 1379 return -EAGAIN; 1380 } 1381 1382 ff_layout_read_record_layoutstats_start(task, hdr); 1383 return 0; 1384 } 1385 1386 /* 1387 * Call ops for the async read/write cases 1388 * In the case of dense layouts, the offset needs to be reset to its 1389 * original value. 1390 */ 1391 static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) 1392 { 1393 struct nfs_pgio_header *hdr = data; 1394 1395 if (ff_layout_read_prepare_common(task, hdr)) 1396 return; 1397 1398 rpc_call_start(task); 1399 } 1400 1401 static int ff_layout_setup_sequence(struct nfs_client *ds_clp, 1402 struct nfs4_sequence_args *args, 1403 struct nfs4_sequence_res *res, 1404 struct rpc_task *task) 1405 { 1406 if (ds_clp->cl_session) 1407 return nfs41_setup_sequence(ds_clp->cl_session, 1408 args, 1409 res, 1410 task); 1411 return nfs40_setup_sequence(ds_clp->cl_slot_tbl, 1412 args, 1413 res, 1414 task); 1415 } 1416 1417 static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) 1418 { 1419 struct nfs_pgio_header *hdr = data; 1420 1421 if (ff_layout_setup_sequence(hdr->ds_clp, 1422 &hdr->args.seq_args, 1423 &hdr->res.seq_res, 1424 task)) 1425 return; 1426 1427 if (ff_layout_read_prepare_common(task, hdr)) 1428 return; 1429 1430 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 1431 hdr->args.lock_context, FMODE_READ) == -EIO) 1432 rpc_exit(task, -EIO); /* lost lock, terminate I/O */ 1433 } 1434 1435 static void ff_layout_read_call_done(struct rpc_task *task, void *data) 1436 { 1437 struct nfs_pgio_header *hdr = data; 1438 1439 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); 1440 1441 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && 1442 task->tk_status == 0) { 1443 nfs4_sequence_done(task, &hdr->res.seq_res); 1444 return; 1445 } 1446 1447 /* Note this may cause RPC to be resent */ 1448 hdr->mds_ops->rpc_call_done(task, hdr); 1449 } 1450 1451 static void ff_layout_read_count_stats(struct rpc_task *task, void *data) 1452 { 1453 struct nfs_pgio_header *hdr = data; 1454 1455 ff_layout_read_record_layoutstats_done(task, hdr); 1456 rpc_count_iostats_metrics(task, 1457 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); 1458 } 1459 1460 static void ff_layout_read_release(void *data) 1461 { 1462 struct nfs_pgio_header *hdr = data; 1463 1464 ff_layout_read_record_layoutstats_done(&hdr->task, hdr); 1465 pnfs_generic_rw_release(data); 1466 } 1467 1468 1469 static int ff_layout_write_done_cb(struct rpc_task *task, 1470 struct nfs_pgio_header *hdr) 1471 { 1472 loff_t end_offs = 0; 1473 int err; 1474 1475 trace_nfs4_pnfs_write(hdr, task->tk_status); 1476 if (task->tk_status < 0) 1477 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, 1478 hdr->args.offset, hdr->args.count, 1479 hdr->res.op_status, OP_WRITE, 1480 task->tk_status); 1481 err = ff_layout_async_handle_error(task, hdr->args.context->state, 1482 hdr->ds_clp, hdr->lseg, 1483 hdr->pgio_mirror_idx); 1484 1485 switch (err) { 1486 case -NFS4ERR_RESET_TO_PNFS: 1487 ff_layout_reset_write(hdr, true); 1488 return task->tk_status; 1489 case -NFS4ERR_RESET_TO_MDS: 1490 ff_layout_reset_write(hdr, false); 1491 return task->tk_status; 1492 case -EAGAIN: 1493 return -EAGAIN; 1494 } 1495 1496 if (hdr->res.verf->committed == NFS_FILE_SYNC || 1497 hdr->res.verf->committed == NFS_DATA_SYNC) 1498 end_offs = hdr->mds_offset + (loff_t)hdr->res.count; 1499 1500 /* Note: if the write is unstable, don't set end_offs until commit */ 1501 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); 1502 1503 /* zero out fattr since we don't care DS attr at all */ 1504 hdr->fattr.valid = 0; 1505 if (task->tk_status >= 0) 1506 nfs_writeback_update_inode(hdr); 1507 1508 return 0; 1509 } 1510 1511 static int ff_layout_commit_done_cb(struct rpc_task *task, 1512 struct nfs_commit_data *data) 1513 { 1514 int err; 1515 1516 trace_nfs4_pnfs_commit_ds(data, task->tk_status); 1517 if (task->tk_status < 0) 1518 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, 1519 data->args.offset, data->args.count, 1520 data->res.op_status, OP_COMMIT, 1521 task->tk_status); 1522 err = ff_layout_async_handle_error(task, NULL, data->ds_clp, 1523 data->lseg, data->ds_commit_index); 1524 1525 switch (err) { 1526 case -NFS4ERR_RESET_TO_PNFS: 1527 pnfs_generic_prepare_to_resend_writes(data); 1528 return -EAGAIN; 1529 case -NFS4ERR_RESET_TO_MDS: 1530 pnfs_generic_prepare_to_resend_writes(data); 1531 return -EAGAIN; 1532 case -EAGAIN: 1533 rpc_restart_call_prepare(task); 1534 return -EAGAIN; 1535 } 1536 1537 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb); 1538 1539 return 0; 1540 } 1541 1542 static void ff_layout_write_record_layoutstats_start(struct rpc_task *task, 1543 struct nfs_pgio_header *hdr) 1544 { 1545 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) 1546 return; 1547 nfs4_ff_layout_stat_io_start_write(hdr->inode, 1548 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1549 hdr->args.count, 1550 task->tk_start); 1551 } 1552 1553 static void ff_layout_write_record_layoutstats_done(struct rpc_task *task, 1554 struct nfs_pgio_header *hdr) 1555 { 1556 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) 1557 return; 1558 nfs4_ff_layout_stat_io_end_write(task, 1559 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1560 hdr->args.count, hdr->res.count, 1561 hdr->res.verf->committed); 1562 } 1563 1564 static int ff_layout_write_prepare_common(struct rpc_task *task, 1565 struct nfs_pgio_header *hdr) 1566 { 1567 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { 1568 rpc_exit(task, -EIO); 1569 return -EIO; 1570 } 1571 1572 if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) { 1573 rpc_exit(task, -EHOSTDOWN); 1574 return -EAGAIN; 1575 } 1576 1577 ff_layout_write_record_layoutstats_start(task, hdr); 1578 return 0; 1579 } 1580 1581 static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) 1582 { 1583 struct nfs_pgio_header *hdr = data; 1584 1585 if (ff_layout_write_prepare_common(task, hdr)) 1586 return; 1587 1588 rpc_call_start(task); 1589 } 1590 1591 static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) 1592 { 1593 struct nfs_pgio_header *hdr = data; 1594 1595 if (ff_layout_setup_sequence(hdr->ds_clp, 1596 &hdr->args.seq_args, 1597 &hdr->res.seq_res, 1598 task)) 1599 return; 1600 1601 if (ff_layout_write_prepare_common(task, hdr)) 1602 return; 1603 1604 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 1605 hdr->args.lock_context, FMODE_WRITE) == -EIO) 1606 rpc_exit(task, -EIO); /* lost lock, terminate I/O */ 1607 } 1608 1609 static void ff_layout_write_call_done(struct rpc_task *task, void *data) 1610 { 1611 struct nfs_pgio_header *hdr = data; 1612 1613 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && 1614 task->tk_status == 0) { 1615 nfs4_sequence_done(task, &hdr->res.seq_res); 1616 return; 1617 } 1618 1619 /* Note this may cause RPC to be resent */ 1620 hdr->mds_ops->rpc_call_done(task, hdr); 1621 } 1622 1623 static void ff_layout_write_count_stats(struct rpc_task *task, void *data) 1624 { 1625 struct nfs_pgio_header *hdr = data; 1626 1627 ff_layout_write_record_layoutstats_done(task, hdr); 1628 rpc_count_iostats_metrics(task, 1629 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); 1630 } 1631 1632 static void ff_layout_write_release(void *data) 1633 { 1634 struct nfs_pgio_header *hdr = data; 1635 1636 ff_layout_write_record_layoutstats_done(&hdr->task, hdr); 1637 pnfs_generic_rw_release(data); 1638 } 1639 1640 static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task, 1641 struct nfs_commit_data *cdata) 1642 { 1643 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags)) 1644 return; 1645 nfs4_ff_layout_stat_io_start_write(cdata->inode, 1646 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), 1647 0, task->tk_start); 1648 } 1649 1650 static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task, 1651 struct nfs_commit_data *cdata) 1652 { 1653 struct nfs_page *req; 1654 __u64 count = 0; 1655 1656 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags)) 1657 return; 1658 1659 if (task->tk_status == 0) { 1660 list_for_each_entry(req, &cdata->pages, wb_list) 1661 count += req->wb_bytes; 1662 } 1663 nfs4_ff_layout_stat_io_end_write(task, 1664 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), 1665 count, count, NFS_FILE_SYNC); 1666 } 1667 1668 static void ff_layout_commit_prepare_common(struct rpc_task *task, 1669 struct nfs_commit_data *cdata) 1670 { 1671 ff_layout_commit_record_layoutstats_start(task, cdata); 1672 } 1673 1674 static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) 1675 { 1676 ff_layout_commit_prepare_common(task, data); 1677 rpc_call_start(task); 1678 } 1679 1680 static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) 1681 { 1682 struct nfs_commit_data *wdata = data; 1683 1684 if (ff_layout_setup_sequence(wdata->ds_clp, 1685 &wdata->args.seq_args, 1686 &wdata->res.seq_res, 1687 task)) 1688 return; 1689 ff_layout_commit_prepare_common(task, data); 1690 } 1691 1692 static void ff_layout_commit_done(struct rpc_task *task, void *data) 1693 { 1694 pnfs_generic_write_commit_done(task, data); 1695 } 1696 1697 static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) 1698 { 1699 struct nfs_commit_data *cdata = data; 1700 1701 ff_layout_commit_record_layoutstats_done(task, cdata); 1702 rpc_count_iostats_metrics(task, 1703 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); 1704 } 1705 1706 static void ff_layout_commit_release(void *data) 1707 { 1708 struct nfs_commit_data *cdata = data; 1709 1710 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata); 1711 pnfs_generic_commit_release(data); 1712 } 1713 1714 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { 1715 .rpc_call_prepare = ff_layout_read_prepare_v3, 1716 .rpc_call_done = ff_layout_read_call_done, 1717 .rpc_count_stats = ff_layout_read_count_stats, 1718 .rpc_release = ff_layout_read_release, 1719 }; 1720 1721 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { 1722 .rpc_call_prepare = ff_layout_read_prepare_v4, 1723 .rpc_call_done = ff_layout_read_call_done, 1724 .rpc_count_stats = ff_layout_read_count_stats, 1725 .rpc_release = ff_layout_read_release, 1726 }; 1727 1728 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { 1729 .rpc_call_prepare = ff_layout_write_prepare_v3, 1730 .rpc_call_done = ff_layout_write_call_done, 1731 .rpc_count_stats = ff_layout_write_count_stats, 1732 .rpc_release = ff_layout_write_release, 1733 }; 1734 1735 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { 1736 .rpc_call_prepare = ff_layout_write_prepare_v4, 1737 .rpc_call_done = ff_layout_write_call_done, 1738 .rpc_count_stats = ff_layout_write_count_stats, 1739 .rpc_release = ff_layout_write_release, 1740 }; 1741 1742 static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { 1743 .rpc_call_prepare = ff_layout_commit_prepare_v3, 1744 .rpc_call_done = ff_layout_commit_done, 1745 .rpc_count_stats = ff_layout_commit_count_stats, 1746 .rpc_release = ff_layout_commit_release, 1747 }; 1748 1749 static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { 1750 .rpc_call_prepare = ff_layout_commit_prepare_v4, 1751 .rpc_call_done = ff_layout_commit_done, 1752 .rpc_count_stats = ff_layout_commit_count_stats, 1753 .rpc_release = ff_layout_commit_release, 1754 }; 1755 1756 static enum pnfs_try_status 1757 ff_layout_read_pagelist(struct nfs_pgio_header *hdr) 1758 { 1759 struct pnfs_layout_segment *lseg = hdr->lseg; 1760 struct nfs4_pnfs_ds *ds; 1761 struct rpc_clnt *ds_clnt; 1762 struct rpc_cred *ds_cred; 1763 loff_t offset = hdr->args.offset; 1764 u32 idx = hdr->pgio_mirror_idx; 1765 int vers; 1766 struct nfs_fh *fh; 1767 1768 dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", 1769 __func__, hdr->inode->i_ino, 1770 hdr->args.pgbase, (size_t)hdr->args.count, offset); 1771 1772 ds = nfs4_ff_layout_prepare_ds(lseg, idx, false); 1773 if (!ds) 1774 goto out_failed; 1775 1776 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, 1777 hdr->inode); 1778 if (IS_ERR(ds_clnt)) 1779 goto out_failed; 1780 1781 ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); 1782 if (!ds_cred) 1783 goto out_failed; 1784 1785 vers = nfs4_ff_layout_ds_version(lseg, idx); 1786 1787 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, 1788 ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers); 1789 1790 hdr->pgio_done_cb = ff_layout_read_done_cb; 1791 atomic_inc(&ds->ds_clp->cl_count); 1792 hdr->ds_clp = ds->ds_clp; 1793 fh = nfs4_ff_layout_select_ds_fh(lseg, idx); 1794 if (fh) 1795 hdr->args.fh = fh; 1796 /* 1797 * Note that if we ever decide to split across DSes, 1798 * then we may need to handle dense-like offsets. 1799 */ 1800 hdr->args.offset = offset; 1801 hdr->mds_offset = offset; 1802 1803 /* Perform an asynchronous read to ds */ 1804 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, 1805 vers == 3 ? &ff_layout_read_call_ops_v3 : 1806 &ff_layout_read_call_ops_v4, 1807 0, RPC_TASK_SOFTCONN); 1808 put_rpccred(ds_cred); 1809 return PNFS_ATTEMPTED; 1810 1811 out_failed: 1812 if (ff_layout_avoid_mds_available_ds(lseg)) 1813 return PNFS_TRY_AGAIN; 1814 return PNFS_NOT_ATTEMPTED; 1815 } 1816 1817 /* Perform async writes. */ 1818 static enum pnfs_try_status 1819 ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) 1820 { 1821 struct pnfs_layout_segment *lseg = hdr->lseg; 1822 struct nfs4_pnfs_ds *ds; 1823 struct rpc_clnt *ds_clnt; 1824 struct rpc_cred *ds_cred; 1825 loff_t offset = hdr->args.offset; 1826 int vers; 1827 struct nfs_fh *fh; 1828 int idx = hdr->pgio_mirror_idx; 1829 1830 ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); 1831 if (!ds) 1832 return PNFS_NOT_ATTEMPTED; 1833 1834 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, 1835 hdr->inode); 1836 if (IS_ERR(ds_clnt)) 1837 return PNFS_NOT_ATTEMPTED; 1838 1839 ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); 1840 if (!ds_cred) 1841 return PNFS_NOT_ATTEMPTED; 1842 1843 vers = nfs4_ff_layout_ds_version(lseg, idx); 1844 1845 dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n", 1846 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, 1847 offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), 1848 vers); 1849 1850 hdr->pgio_done_cb = ff_layout_write_done_cb; 1851 atomic_inc(&ds->ds_clp->cl_count); 1852 hdr->ds_clp = ds->ds_clp; 1853 hdr->ds_commit_idx = idx; 1854 fh = nfs4_ff_layout_select_ds_fh(lseg, idx); 1855 if (fh) 1856 hdr->args.fh = fh; 1857 1858 /* 1859 * Note that if we ever decide to split across DSes, 1860 * then we may need to handle dense-like offsets. 1861 */ 1862 hdr->args.offset = offset; 1863 1864 /* Perform an asynchronous write */ 1865 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, 1866 vers == 3 ? &ff_layout_write_call_ops_v3 : 1867 &ff_layout_write_call_ops_v4, 1868 sync, RPC_TASK_SOFTCONN); 1869 put_rpccred(ds_cred); 1870 return PNFS_ATTEMPTED; 1871 } 1872 1873 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) 1874 { 1875 return i; 1876 } 1877 1878 static struct nfs_fh * 1879 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) 1880 { 1881 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 1882 1883 /* FIXME: Assume that there is only one NFS version available 1884 * for the DS. 1885 */ 1886 return &flseg->mirror_array[i]->fh_versions[0]; 1887 } 1888 1889 static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) 1890 { 1891 struct pnfs_layout_segment *lseg = data->lseg; 1892 struct nfs4_pnfs_ds *ds; 1893 struct rpc_clnt *ds_clnt; 1894 struct rpc_cred *ds_cred; 1895 u32 idx; 1896 int vers, ret; 1897 struct nfs_fh *fh; 1898 1899 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); 1900 ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); 1901 if (!ds) 1902 goto out_err; 1903 1904 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, 1905 data->inode); 1906 if (IS_ERR(ds_clnt)) 1907 goto out_err; 1908 1909 ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred); 1910 if (!ds_cred) 1911 goto out_err; 1912 1913 vers = nfs4_ff_layout_ds_version(lseg, idx); 1914 1915 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, 1916 data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count), 1917 vers); 1918 data->commit_done_cb = ff_layout_commit_done_cb; 1919 data->cred = ds_cred; 1920 atomic_inc(&ds->ds_clp->cl_count); 1921 data->ds_clp = ds->ds_clp; 1922 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); 1923 if (fh) 1924 data->args.fh = fh; 1925 1926 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, 1927 vers == 3 ? &ff_layout_commit_call_ops_v3 : 1928 &ff_layout_commit_call_ops_v4, 1929 how, RPC_TASK_SOFTCONN); 1930 put_rpccred(ds_cred); 1931 return ret; 1932 out_err: 1933 pnfs_generic_prepare_to_resend_writes(data); 1934 pnfs_generic_commit_release(data); 1935 return -EAGAIN; 1936 } 1937 1938 static int 1939 ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, 1940 int how, struct nfs_commit_info *cinfo) 1941 { 1942 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, 1943 ff_layout_initiate_commit); 1944 } 1945 1946 static struct pnfs_ds_commit_info * 1947 ff_layout_get_ds_info(struct inode *inode) 1948 { 1949 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; 1950 1951 if (layout == NULL) 1952 return NULL; 1953 1954 return &FF_LAYOUT_FROM_HDR(layout)->commit_info; 1955 } 1956 1957 static void 1958 ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) 1959 { 1960 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, 1961 id_node)); 1962 } 1963 1964 static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo, 1965 struct xdr_stream *xdr, 1966 const struct nfs4_layoutreturn_args *args) 1967 { 1968 struct pnfs_layout_hdr *hdr = &flo->generic_hdr; 1969 __be32 *start; 1970 int count = 0, ret = 0; 1971 1972 start = xdr_reserve_space(xdr, 4); 1973 if (unlikely(!start)) 1974 return -E2BIG; 1975 1976 /* This assume we always return _ALL_ layouts */ 1977 spin_lock(&hdr->plh_inode->i_lock); 1978 ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range); 1979 spin_unlock(&hdr->plh_inode->i_lock); 1980 1981 *start = cpu_to_be32(count); 1982 1983 return ret; 1984 } 1985 1986 /* report nothing for now */ 1987 static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo, 1988 struct xdr_stream *xdr, 1989 const struct nfs4_layoutreturn_args *args) 1990 { 1991 __be32 *p; 1992 1993 p = xdr_reserve_space(xdr, 4); 1994 if (likely(p)) 1995 *p = cpu_to_be32(0); 1996 } 1997 1998 static struct nfs4_deviceid_node * 1999 ff_layout_alloc_deviceid_node(struct nfs_server *server, 2000 struct pnfs_device *pdev, gfp_t gfp_flags) 2001 { 2002 struct nfs4_ff_layout_ds *dsaddr; 2003 2004 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); 2005 if (!dsaddr) 2006 return NULL; 2007 return &dsaddr->id_node; 2008 } 2009 2010 static void 2011 ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo, 2012 struct xdr_stream *xdr, 2013 const struct nfs4_layoutreturn_args *args) 2014 { 2015 struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo); 2016 __be32 *start; 2017 2018 dprintk("%s: Begin\n", __func__); 2019 start = xdr_reserve_space(xdr, 4); 2020 BUG_ON(!start); 2021 2022 ff_layout_encode_ioerr(flo, xdr, args); 2023 ff_layout_encode_iostats(flo, xdr, args); 2024 2025 *start = cpu_to_be32((xdr->p - start - 1) * 4); 2026 dprintk("%s: Return\n", __func__); 2027 } 2028 2029 static int 2030 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) 2031 { 2032 const struct sockaddr_in *sin = (struct sockaddr_in *)sap; 2033 2034 return snprintf(buf, buflen, "%pI4", &sin->sin_addr); 2035 } 2036 2037 static size_t 2038 ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, 2039 const int buflen) 2040 { 2041 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; 2042 const struct in6_addr *addr = &sin6->sin6_addr; 2043 2044 /* 2045 * RFC 4291, Section 2.2.2 2046 * 2047 * Shorthanded ANY address 2048 */ 2049 if (ipv6_addr_any(addr)) 2050 return snprintf(buf, buflen, "::"); 2051 2052 /* 2053 * RFC 4291, Section 2.2.2 2054 * 2055 * Shorthanded loopback address 2056 */ 2057 if (ipv6_addr_loopback(addr)) 2058 return snprintf(buf, buflen, "::1"); 2059 2060 /* 2061 * RFC 4291, Section 2.2.3 2062 * 2063 * Special presentation address format for mapped v4 2064 * addresses. 2065 */ 2066 if (ipv6_addr_v4mapped(addr)) 2067 return snprintf(buf, buflen, "::ffff:%pI4", 2068 &addr->s6_addr32[3]); 2069 2070 /* 2071 * RFC 4291, Section 2.2.1 2072 */ 2073 return snprintf(buf, buflen, "%pI6c", addr); 2074 } 2075 2076 /* Derived from rpc_sockaddr2uaddr */ 2077 static void 2078 ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) 2079 { 2080 struct sockaddr *sap = (struct sockaddr *)&da->da_addr; 2081 char portbuf[RPCBIND_MAXUADDRPLEN]; 2082 char addrbuf[RPCBIND_MAXUADDRLEN]; 2083 char *netid; 2084 unsigned short port; 2085 int len, netid_len; 2086 __be32 *p; 2087 2088 switch (sap->sa_family) { 2089 case AF_INET: 2090 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) 2091 return; 2092 port = ntohs(((struct sockaddr_in *)sap)->sin_port); 2093 netid = "tcp"; 2094 netid_len = 3; 2095 break; 2096 case AF_INET6: 2097 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) 2098 return; 2099 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); 2100 netid = "tcp6"; 2101 netid_len = 4; 2102 break; 2103 default: 2104 /* we only support tcp and tcp6 */ 2105 WARN_ON_ONCE(1); 2106 return; 2107 } 2108 2109 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); 2110 len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); 2111 2112 p = xdr_reserve_space(xdr, 4 + netid_len); 2113 xdr_encode_opaque(p, netid, netid_len); 2114 2115 p = xdr_reserve_space(xdr, 4 + len); 2116 xdr_encode_opaque(p, addrbuf, len); 2117 } 2118 2119 static void 2120 ff_layout_encode_nfstime(struct xdr_stream *xdr, 2121 ktime_t t) 2122 { 2123 struct timespec64 ts; 2124 __be32 *p; 2125 2126 p = xdr_reserve_space(xdr, 12); 2127 ts = ktime_to_timespec64(t); 2128 p = xdr_encode_hyper(p, ts.tv_sec); 2129 *p++ = cpu_to_be32(ts.tv_nsec); 2130 } 2131 2132 static void 2133 ff_layout_encode_io_latency(struct xdr_stream *xdr, 2134 struct nfs4_ff_io_stat *stat) 2135 { 2136 __be32 *p; 2137 2138 p = xdr_reserve_space(xdr, 5 * 8); 2139 p = xdr_encode_hyper(p, stat->ops_requested); 2140 p = xdr_encode_hyper(p, stat->bytes_requested); 2141 p = xdr_encode_hyper(p, stat->ops_completed); 2142 p = xdr_encode_hyper(p, stat->bytes_completed); 2143 p = xdr_encode_hyper(p, stat->bytes_not_delivered); 2144 ff_layout_encode_nfstime(xdr, stat->total_busy_time); 2145 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); 2146 } 2147 2148 static void 2149 ff_layout_encode_layoutstats(struct xdr_stream *xdr, 2150 struct nfs42_layoutstat_args *args, 2151 struct nfs42_layoutstat_devinfo *devinfo) 2152 { 2153 struct nfs4_ff_layout_mirror *mirror = devinfo->layout_private; 2154 struct nfs4_pnfs_ds_addr *da; 2155 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds; 2156 struct nfs_fh *fh = &mirror->fh_versions[0]; 2157 __be32 *p, *start; 2158 2159 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); 2160 dprintk("%s: DS %s: encoding address %s\n", 2161 __func__, ds->ds_remotestr, da->da_remotestr); 2162 /* layoutupdate length */ 2163 start = xdr_reserve_space(xdr, 4); 2164 /* netaddr4 */ 2165 ff_layout_encode_netaddr(xdr, da); 2166 /* nfs_fh4 */ 2167 p = xdr_reserve_space(xdr, 4 + fh->size); 2168 xdr_encode_opaque(p, fh->data, fh->size); 2169 /* ff_io_latency4 read */ 2170 spin_lock(&mirror->lock); 2171 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat); 2172 /* ff_io_latency4 write */ 2173 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat); 2174 spin_unlock(&mirror->lock); 2175 /* nfstime4 */ 2176 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time)); 2177 /* bool */ 2178 p = xdr_reserve_space(xdr, 4); 2179 *p = cpu_to_be32(false); 2180 2181 *start = cpu_to_be32((xdr->p - start - 1) * 4); 2182 } 2183 2184 static int 2185 ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args, 2186 struct pnfs_layout_hdr *lo, 2187 int dev_limit) 2188 { 2189 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); 2190 struct nfs4_ff_layout_mirror *mirror; 2191 struct nfs4_deviceid_node *dev; 2192 struct nfs42_layoutstat_devinfo *devinfo; 2193 int i = 0; 2194 2195 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { 2196 if (i >= dev_limit) 2197 break; 2198 if (!mirror->mirror_ds) 2199 continue; 2200 /* mirror refcount put in cleanup_layoutstats */ 2201 if (!atomic_inc_not_zero(&mirror->ref)) 2202 continue; 2203 dev = &mirror->mirror_ds->id_node; 2204 devinfo = &args->devinfo[i]; 2205 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE); 2206 devinfo->offset = 0; 2207 devinfo->length = NFS4_MAX_UINT64; 2208 devinfo->read_count = mirror->read_stat.io_stat.ops_completed; 2209 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed; 2210 devinfo->write_count = mirror->write_stat.io_stat.ops_completed; 2211 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed; 2212 devinfo->layout_type = LAYOUT_FLEX_FILES; 2213 devinfo->layoutstats_encode = ff_layout_encode_layoutstats; 2214 devinfo->layout_private = mirror; 2215 2216 i++; 2217 } 2218 return i; 2219 } 2220 2221 static int 2222 ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) 2223 { 2224 struct nfs4_flexfile_layout *ff_layout; 2225 struct nfs4_ff_layout_mirror *mirror; 2226 int dev_count = 0; 2227 2228 spin_lock(&args->inode->i_lock); 2229 ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout); 2230 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { 2231 if (atomic_read(&mirror->ref) != 0) 2232 dev_count ++; 2233 } 2234 spin_unlock(&args->inode->i_lock); 2235 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ 2236 if (dev_count > PNFS_LAYOUTSTATS_MAXDEV) { 2237 dprintk("%s: truncating devinfo to limit (%d:%d)\n", 2238 __func__, dev_count, PNFS_LAYOUTSTATS_MAXDEV); 2239 dev_count = PNFS_LAYOUTSTATS_MAXDEV; 2240 } 2241 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO); 2242 if (!args->devinfo) 2243 return -ENOMEM; 2244 2245 spin_lock(&args->inode->i_lock); 2246 args->num_dev = ff_layout_mirror_prepare_stats(args, 2247 &ff_layout->generic_hdr, dev_count); 2248 spin_unlock(&args->inode->i_lock); 2249 2250 return 0; 2251 } 2252 2253 static void 2254 ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data *data) 2255 { 2256 struct nfs4_ff_layout_mirror *mirror; 2257 int i; 2258 2259 for (i = 0; i < data->args.num_dev; i++) { 2260 mirror = data->args.devinfo[i].layout_private; 2261 data->args.devinfo[i].layout_private = NULL; 2262 ff_layout_put_mirror(mirror); 2263 } 2264 } 2265 2266 static struct pnfs_layoutdriver_type flexfilelayout_type = { 2267 .id = LAYOUT_FLEX_FILES, 2268 .name = "LAYOUT_FLEX_FILES", 2269 .owner = THIS_MODULE, 2270 .alloc_layout_hdr = ff_layout_alloc_layout_hdr, 2271 .free_layout_hdr = ff_layout_free_layout_hdr, 2272 .alloc_lseg = ff_layout_alloc_lseg, 2273 .free_lseg = ff_layout_free_lseg, 2274 .add_lseg = ff_layout_add_lseg, 2275 .pg_read_ops = &ff_layout_pg_read_ops, 2276 .pg_write_ops = &ff_layout_pg_write_ops, 2277 .get_ds_info = ff_layout_get_ds_info, 2278 .free_deviceid_node = ff_layout_free_deviceid_node, 2279 .mark_request_commit = pnfs_layout_mark_request_commit, 2280 .clear_request_commit = pnfs_generic_clear_request_commit, 2281 .scan_commit_lists = pnfs_generic_scan_commit_lists, 2282 .recover_commit_reqs = pnfs_generic_recover_commit_reqs, 2283 .commit_pagelist = ff_layout_commit_pagelist, 2284 .read_pagelist = ff_layout_read_pagelist, 2285 .write_pagelist = ff_layout_write_pagelist, 2286 .alloc_deviceid_node = ff_layout_alloc_deviceid_node, 2287 .encode_layoutreturn = ff_layout_encode_layoutreturn, 2288 .sync = pnfs_nfs_generic_sync, 2289 .prepare_layoutstats = ff_layout_prepare_layoutstats, 2290 .cleanup_layoutstats = ff_layout_cleanup_layoutstats, 2291 }; 2292 2293 static int __init nfs4flexfilelayout_init(void) 2294 { 2295 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", 2296 __func__); 2297 if (!ff_zero_group) { 2298 ff_zero_group = groups_alloc(0); 2299 if (!ff_zero_group) 2300 return -ENOMEM; 2301 } 2302 return pnfs_register_layoutdriver(&flexfilelayout_type); 2303 } 2304 2305 static void __exit nfs4flexfilelayout_exit(void) 2306 { 2307 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", 2308 __func__); 2309 pnfs_unregister_layoutdriver(&flexfilelayout_type); 2310 if (ff_zero_group) { 2311 put_group_info(ff_zero_group); 2312 ff_zero_group = NULL; 2313 } 2314 } 2315 2316 MODULE_ALIAS("nfs-layouttype4-4"); 2317 2318 MODULE_LICENSE("GPL"); 2319 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); 2320 2321 module_init(nfs4flexfilelayout_init); 2322 module_exit(nfs4flexfilelayout_exit); 2323