1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Module for pnfs flexfile layout driver. 4 * 5 * Copyright (c) 2014, Primary Data, Inc. All rights reserved. 6 * 7 * Tao Peng <bergwolf@primarydata.com> 8 */ 9 10 #include <linux/nfs_fs.h> 11 #include <linux/nfs_mount.h> 12 #include <linux/nfs_page.h> 13 #include <linux/module.h> 14 #include <linux/file.h> 15 #include <linux/sched/mm.h> 16 17 #include <linux/sunrpc/metrics.h> 18 19 #include "flexfilelayout.h" 20 #include "../nfs4session.h" 21 #include "../nfs4idmap.h" 22 #include "../internal.h" 23 #include "../delegation.h" 24 #include "../nfs4trace.h" 25 #include "../iostat.h" 26 #include "../nfs.h" 27 #include "../nfs42.h" 28 29 #define NFSDBG_FACILITY NFSDBG_PNFS_LD 30 31 #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ) 32 #define FF_LAYOUTRETURN_MAXERR 20 33 34 enum nfs4_ff_op_type { 35 NFS4_FF_OP_LAYOUTSTATS, 36 NFS4_FF_OP_LAYOUTRETURN, 37 }; 38 39 static unsigned short io_maxretrans; 40 41 static const struct pnfs_commit_ops ff_layout_commit_ops; 42 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, 43 struct nfs_pgio_header *hdr); 44 static int 45 ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, 46 struct nfs42_layoutstat_devinfo *devinfo, 47 int dev_limit, enum nfs4_ff_op_type type); 48 static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr, 49 const struct nfs42_layoutstat_devinfo *devinfo, 50 struct nfs4_ff_layout_mirror *mirror); 51 52 static struct pnfs_layout_hdr * 53 ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) 54 { 55 struct nfs4_flexfile_layout *ffl; 56 57 ffl = kzalloc(sizeof(*ffl), gfp_flags); 58 if (ffl) { 59 pnfs_init_ds_commit_info(&ffl->commit_info); 60 INIT_LIST_HEAD(&ffl->error_list); 61 INIT_LIST_HEAD(&ffl->mirrors); 62 ffl->last_report_time = ktime_get(); 63 ffl->commit_info.ops = &ff_layout_commit_ops; 64 return &ffl->generic_hdr; 65 } else 66 return NULL; 67 } 68 69 static void 70 ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo) 71 { 72 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(lo); 73 struct nfs4_ff_layout_ds_err *err, *n; 74 75 list_for_each_entry_safe(err, n, &ffl->error_list, list) { 76 list_del(&err->list); 77 kfree(err); 78 } 79 kfree_rcu(ffl, generic_hdr.plh_rcu); 80 } 81 82 static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) 83 { 84 __be32 *p; 85 86 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); 87 if (unlikely(p == NULL)) 88 return -ENOBUFS; 89 stateid->type = NFS4_PNFS_DS_STATEID_TYPE; 90 memcpy(stateid->data, p, NFS4_STATEID_SIZE); 91 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__, 92 p[0], p[1], p[2], p[3]); 93 return 0; 94 } 95 96 static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid) 97 { 98 __be32 *p; 99 100 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE); 101 if (unlikely(!p)) 102 return -ENOBUFS; 103 memcpy(devid, p, NFS4_DEVICEID4_SIZE); 104 nfs4_print_deviceid(devid); 105 return 0; 106 } 107 108 static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh) 109 { 110 __be32 *p; 111 112 p = xdr_inline_decode(xdr, 4); 113 if (unlikely(!p)) 114 return -ENOBUFS; 115 fh->size = be32_to_cpup(p++); 116 if (fh->size > NFS_MAXFHSIZE) { 117 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n", 118 fh->size); 119 return -EOVERFLOW; 120 } 121 /* fh.data */ 122 p = xdr_inline_decode(xdr, fh->size); 123 if (unlikely(!p)) 124 return -ENOBUFS; 125 memcpy(&fh->data, p, fh->size); 126 dprintk("%s: fh len %d\n", __func__, fh->size); 127 128 return 0; 129 } 130 131 /* 132 * Currently only stringified uids and gids are accepted. 133 * I.e., kerberos is not supported to the DSes, so no pricipals. 134 * 135 * That means that one common function will suffice, but when 136 * principals are added, this should be split to accomodate 137 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid(). 138 */ 139 static int 140 decode_name(struct xdr_stream *xdr, u32 *id) 141 { 142 __be32 *p; 143 int len; 144 145 /* opaque_length(4)*/ 146 p = xdr_inline_decode(xdr, 4); 147 if (unlikely(!p)) 148 return -ENOBUFS; 149 len = be32_to_cpup(p++); 150 if (len < 0) 151 return -EINVAL; 152 153 dprintk("%s: len %u\n", __func__, len); 154 155 /* opaque body */ 156 p = xdr_inline_decode(xdr, len); 157 if (unlikely(!p)) 158 return -ENOBUFS; 159 160 if (!nfs_map_string_to_numeric((char *)p, len, id)) 161 return -EINVAL; 162 163 return 0; 164 } 165 166 static struct nfsd_file * 167 ff_local_open_fh(struct pnfs_layout_segment *lseg, u32 ds_idx, 168 struct nfs_client *clp, const struct cred *cred, 169 struct nfs_fh *fh, fmode_t mode) 170 { 171 #if IS_ENABLED(CONFIG_NFS_LOCALIO) 172 struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx); 173 174 return nfs_local_open_fh(clp, cred, fh, &mirror->nfl, mode); 175 #else 176 return NULL; 177 #endif 178 } 179 180 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1, 181 const struct nfs4_ff_layout_mirror *m2) 182 { 183 int i, j; 184 185 if (m1->fh_versions_cnt != m2->fh_versions_cnt) 186 return false; 187 for (i = 0; i < m1->fh_versions_cnt; i++) { 188 bool found_fh = false; 189 for (j = 0; j < m2->fh_versions_cnt; j++) { 190 if (nfs_compare_fh(&m1->fh_versions[i], 191 &m2->fh_versions[j]) == 0) { 192 found_fh = true; 193 break; 194 } 195 } 196 if (!found_fh) 197 return false; 198 } 199 return true; 200 } 201 202 static struct nfs4_ff_layout_mirror * 203 ff_layout_add_mirror(struct pnfs_layout_hdr *lo, 204 struct nfs4_ff_layout_mirror *mirror) 205 { 206 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); 207 struct nfs4_ff_layout_mirror *pos; 208 struct inode *inode = lo->plh_inode; 209 210 spin_lock(&inode->i_lock); 211 list_for_each_entry(pos, &ff_layout->mirrors, mirrors) { 212 if (memcmp(&mirror->devid, &pos->devid, sizeof(pos->devid)) != 0) 213 continue; 214 if (!ff_mirror_match_fh(mirror, pos)) 215 continue; 216 if (refcount_inc_not_zero(&pos->ref)) { 217 spin_unlock(&inode->i_lock); 218 return pos; 219 } 220 } 221 list_add(&mirror->mirrors, &ff_layout->mirrors); 222 mirror->layout = lo; 223 spin_unlock(&inode->i_lock); 224 return mirror; 225 } 226 227 static void 228 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror) 229 { 230 struct inode *inode; 231 if (mirror->layout == NULL) 232 return; 233 inode = mirror->layout->plh_inode; 234 spin_lock(&inode->i_lock); 235 list_del(&mirror->mirrors); 236 spin_unlock(&inode->i_lock); 237 mirror->layout = NULL; 238 } 239 240 static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags) 241 { 242 struct nfs4_ff_layout_mirror *mirror; 243 244 mirror = kzalloc(sizeof(*mirror), gfp_flags); 245 if (mirror != NULL) { 246 spin_lock_init(&mirror->lock); 247 refcount_set(&mirror->ref, 1); 248 INIT_LIST_HEAD(&mirror->mirrors); 249 nfs_localio_file_init(&mirror->nfl); 250 } 251 return mirror; 252 } 253 254 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror) 255 { 256 const struct cred *cred; 257 258 ff_layout_remove_mirror(mirror); 259 kfree(mirror->fh_versions); 260 nfs_close_local_fh(&mirror->nfl); 261 cred = rcu_access_pointer(mirror->ro_cred); 262 put_cred(cred); 263 cred = rcu_access_pointer(mirror->rw_cred); 264 put_cred(cred); 265 nfs4_ff_layout_put_deviceid(mirror->mirror_ds); 266 kfree(mirror); 267 } 268 269 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror) 270 { 271 if (mirror != NULL && refcount_dec_and_test(&mirror->ref)) 272 ff_layout_free_mirror(mirror); 273 } 274 275 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) 276 { 277 u32 i; 278 279 for (i = 0; i < fls->mirror_array_cnt; i++) 280 ff_layout_put_mirror(fls->mirror_array[i]); 281 } 282 283 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) 284 { 285 if (fls) { 286 ff_layout_free_mirror_array(fls); 287 kfree(fls); 288 } 289 } 290 291 static bool 292 ff_lseg_match_mirrors(struct pnfs_layout_segment *l1, 293 struct pnfs_layout_segment *l2) 294 { 295 const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1); 296 const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1); 297 u32 i; 298 299 if (fl1->mirror_array_cnt != fl2->mirror_array_cnt) 300 return false; 301 for (i = 0; i < fl1->mirror_array_cnt; i++) { 302 if (fl1->mirror_array[i] != fl2->mirror_array[i]) 303 return false; 304 } 305 return true; 306 } 307 308 static bool 309 ff_lseg_range_is_after(const struct pnfs_layout_range *l1, 310 const struct pnfs_layout_range *l2) 311 { 312 u64 end1, end2; 313 314 if (l1->iomode != l2->iomode) 315 return l1->iomode != IOMODE_READ; 316 end1 = pnfs_calc_offset_end(l1->offset, l1->length); 317 end2 = pnfs_calc_offset_end(l2->offset, l2->length); 318 if (end1 < l2->offset) 319 return false; 320 if (end2 < l1->offset) 321 return true; 322 return l2->offset <= l1->offset; 323 } 324 325 static bool 326 ff_lseg_merge(struct pnfs_layout_segment *new, 327 struct pnfs_layout_segment *old) 328 { 329 u64 new_end, old_end; 330 331 if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags)) 332 return false; 333 if (new->pls_range.iomode != old->pls_range.iomode) 334 return false; 335 old_end = pnfs_calc_offset_end(old->pls_range.offset, 336 old->pls_range.length); 337 if (old_end < new->pls_range.offset) 338 return false; 339 new_end = pnfs_calc_offset_end(new->pls_range.offset, 340 new->pls_range.length); 341 if (new_end < old->pls_range.offset) 342 return false; 343 if (!ff_lseg_match_mirrors(new, old)) 344 return false; 345 346 /* Mergeable: copy info from 'old' to 'new' */ 347 if (new_end < old_end) 348 new_end = old_end; 349 if (new->pls_range.offset < old->pls_range.offset) 350 new->pls_range.offset = old->pls_range.offset; 351 new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset, 352 new_end); 353 if (test_bit(NFS_LSEG_ROC, &old->pls_flags)) 354 set_bit(NFS_LSEG_ROC, &new->pls_flags); 355 return true; 356 } 357 358 static void 359 ff_layout_add_lseg(struct pnfs_layout_hdr *lo, 360 struct pnfs_layout_segment *lseg, 361 struct list_head *free_me) 362 { 363 pnfs_generic_layout_insert_lseg(lo, lseg, 364 ff_lseg_range_is_after, 365 ff_lseg_merge, 366 free_me); 367 } 368 369 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) 370 { 371 int i, j; 372 373 for (i = 0; i < fls->mirror_array_cnt - 1; i++) { 374 for (j = i + 1; j < fls->mirror_array_cnt; j++) 375 if (fls->mirror_array[i]->efficiency < 376 fls->mirror_array[j]->efficiency) 377 swap(fls->mirror_array[i], 378 fls->mirror_array[j]); 379 } 380 } 381 382 static struct pnfs_layout_segment * 383 ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, 384 struct nfs4_layoutget_res *lgr, 385 gfp_t gfp_flags) 386 { 387 struct pnfs_layout_segment *ret; 388 struct nfs4_ff_layout_segment *fls = NULL; 389 struct xdr_stream stream; 390 struct xdr_buf buf; 391 struct page *scratch; 392 u64 stripe_unit; 393 u32 mirror_array_cnt; 394 __be32 *p; 395 int i, rc; 396 397 dprintk("--> %s\n", __func__); 398 scratch = alloc_page(gfp_flags); 399 if (!scratch) 400 return ERR_PTR(-ENOMEM); 401 402 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, 403 lgr->layoutp->len); 404 xdr_set_scratch_page(&stream, scratch); 405 406 /* stripe unit and mirror_array_cnt */ 407 rc = -EIO; 408 p = xdr_inline_decode(&stream, 8 + 4); 409 if (!p) 410 goto out_err_free; 411 412 p = xdr_decode_hyper(p, &stripe_unit); 413 mirror_array_cnt = be32_to_cpup(p++); 414 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, 415 stripe_unit, mirror_array_cnt); 416 417 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || 418 mirror_array_cnt == 0) 419 goto out_err_free; 420 421 rc = -ENOMEM; 422 fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt), 423 gfp_flags); 424 if (!fls) 425 goto out_err_free; 426 427 fls->mirror_array_cnt = mirror_array_cnt; 428 fls->stripe_unit = stripe_unit; 429 430 for (i = 0; i < fls->mirror_array_cnt; i++) { 431 struct nfs4_ff_layout_mirror *mirror; 432 struct cred *kcred; 433 const struct cred __rcu *cred; 434 kuid_t uid; 435 kgid_t gid; 436 u32 ds_count, fh_count, id; 437 int j; 438 439 rc = -EIO; 440 p = xdr_inline_decode(&stream, 4); 441 if (!p) 442 goto out_err_free; 443 ds_count = be32_to_cpup(p); 444 445 /* FIXME: allow for striping? */ 446 if (ds_count != 1) 447 goto out_err_free; 448 449 fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags); 450 if (fls->mirror_array[i] == NULL) { 451 rc = -ENOMEM; 452 goto out_err_free; 453 } 454 455 fls->mirror_array[i]->ds_count = ds_count; 456 457 /* deviceid */ 458 rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid); 459 if (rc) 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 rc = -EIO; 476 p = xdr_inline_decode(&stream, 4); 477 if (!p) 478 goto out_err_free; 479 fh_count = be32_to_cpup(p); 480 481 fls->mirror_array[i]->fh_versions = 482 kcalloc(fh_count, sizeof(struct nfs_fh), 483 gfp_flags); 484 if (fls->mirror_array[i]->fh_versions == NULL) { 485 rc = -ENOMEM; 486 goto out_err_free; 487 } 488 489 for (j = 0; j < fh_count; j++) { 490 rc = decode_nfs_fh(&stream, 491 &fls->mirror_array[i]->fh_versions[j]); 492 if (rc) 493 goto out_err_free; 494 } 495 496 fls->mirror_array[i]->fh_versions_cnt = fh_count; 497 498 /* user */ 499 rc = decode_name(&stream, &id); 500 if (rc) 501 goto out_err_free; 502 503 uid = make_kuid(&init_user_ns, id); 504 505 /* group */ 506 rc = decode_name(&stream, &id); 507 if (rc) 508 goto out_err_free; 509 510 gid = make_kgid(&init_user_ns, id); 511 512 if (gfp_flags & __GFP_FS) 513 kcred = prepare_kernel_cred(&init_task); 514 else { 515 unsigned int nofs_flags = memalloc_nofs_save(); 516 kcred = prepare_kernel_cred(&init_task); 517 memalloc_nofs_restore(nofs_flags); 518 } 519 rc = -ENOMEM; 520 if (!kcred) 521 goto out_err_free; 522 kcred->fsuid = uid; 523 kcred->fsgid = gid; 524 cred = RCU_INITIALIZER(kcred); 525 526 if (lgr->range.iomode == IOMODE_READ) 527 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); 528 else 529 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); 530 531 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); 532 if (mirror != fls->mirror_array[i]) { 533 /* swap cred ptrs so free_mirror will clean up old */ 534 if (lgr->range.iomode == IOMODE_READ) { 535 cred = xchg(&mirror->ro_cred, cred); 536 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred); 537 } else { 538 cred = xchg(&mirror->rw_cred, cred); 539 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred); 540 } 541 ff_layout_free_mirror(fls->mirror_array[i]); 542 fls->mirror_array[i] = mirror; 543 } 544 545 dprintk("%s: iomode %s uid %u gid %u\n", __func__, 546 lgr->range.iomode == IOMODE_READ ? "READ" : "RW", 547 from_kuid(&init_user_ns, uid), 548 from_kgid(&init_user_ns, gid)); 549 } 550 551 p = xdr_inline_decode(&stream, 4); 552 if (!p) 553 goto out_sort_mirrors; 554 fls->flags = be32_to_cpup(p); 555 556 p = xdr_inline_decode(&stream, 4); 557 if (!p) 558 goto out_sort_mirrors; 559 for (i=0; i < fls->mirror_array_cnt; i++) 560 fls->mirror_array[i]->report_interval = be32_to_cpup(p); 561 562 out_sort_mirrors: 563 ff_layout_sort_mirrors(fls); 564 ret = &fls->generic_hdr; 565 dprintk("<-- %s (success)\n", __func__); 566 out_free_page: 567 __free_page(scratch); 568 return ret; 569 out_err_free: 570 _ff_layout_free_lseg(fls); 571 ret = ERR_PTR(rc); 572 dprintk("<-- %s (%d)\n", __func__, rc); 573 goto out_free_page; 574 } 575 576 static void 577 ff_layout_free_lseg(struct pnfs_layout_segment *lseg) 578 { 579 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 580 581 dprintk("--> %s\n", __func__); 582 583 if (lseg->pls_range.iomode == IOMODE_RW) { 584 struct nfs4_flexfile_layout *ffl; 585 struct inode *inode; 586 587 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); 588 inode = ffl->generic_hdr.plh_inode; 589 spin_lock(&inode->i_lock); 590 pnfs_generic_ds_cinfo_release_lseg(&ffl->commit_info, lseg); 591 spin_unlock(&inode->i_lock); 592 } 593 _ff_layout_free_lseg(fls); 594 } 595 596 static void 597 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) 598 { 599 /* first IO request? */ 600 if (atomic_inc_return(&timer->n_ops) == 1) { 601 timer->start_time = now; 602 } 603 } 604 605 static ktime_t 606 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) 607 { 608 ktime_t start; 609 610 if (atomic_dec_return(&timer->n_ops) < 0) 611 WARN_ON_ONCE(1); 612 613 start = timer->start_time; 614 timer->start_time = now; 615 return ktime_sub(now, start); 616 } 617 618 static bool 619 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, 620 struct nfs4_ff_layoutstat *layoutstat, 621 ktime_t now) 622 { 623 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; 624 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout); 625 626 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); 627 if (!mirror->start_time) 628 mirror->start_time = now; 629 if (mirror->report_interval != 0) 630 report_interval = (s64)mirror->report_interval * 1000LL; 631 else if (layoutstats_timer != 0) 632 report_interval = (s64)layoutstats_timer * 1000LL; 633 if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >= 634 report_interval) { 635 ffl->last_report_time = now; 636 return true; 637 } 638 639 return false; 640 } 641 642 static void 643 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, 644 __u64 requested) 645 { 646 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; 647 648 iostat->ops_requested++; 649 iostat->bytes_requested += requested; 650 } 651 652 static void 653 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, 654 __u64 requested, 655 __u64 completed, 656 ktime_t time_completed, 657 ktime_t time_started) 658 { 659 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; 660 ktime_t completion_time = ktime_sub(time_completed, time_started); 661 ktime_t timer; 662 663 iostat->ops_completed++; 664 iostat->bytes_completed += completed; 665 iostat->bytes_not_delivered += requested - completed; 666 667 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); 668 iostat->total_busy_time = 669 ktime_add(iostat->total_busy_time, timer); 670 iostat->aggregate_completion_time = 671 ktime_add(iostat->aggregate_completion_time, 672 completion_time); 673 } 674 675 static void 676 nfs4_ff_layout_stat_io_start_read(struct inode *inode, 677 struct nfs4_ff_layout_mirror *mirror, 678 __u64 requested, ktime_t now) 679 { 680 bool report; 681 682 spin_lock(&mirror->lock); 683 report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now); 684 nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); 685 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 686 spin_unlock(&mirror->lock); 687 688 if (report) 689 pnfs_report_layoutstat(inode, nfs_io_gfp_mask()); 690 } 691 692 static void 693 nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, 694 struct nfs4_ff_layout_mirror *mirror, 695 __u64 requested, 696 __u64 completed) 697 { 698 spin_lock(&mirror->lock); 699 nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat, 700 requested, completed, 701 ktime_get(), task->tk_start); 702 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 703 spin_unlock(&mirror->lock); 704 } 705 706 static void 707 nfs4_ff_layout_stat_io_start_write(struct inode *inode, 708 struct nfs4_ff_layout_mirror *mirror, 709 __u64 requested, ktime_t now) 710 { 711 bool report; 712 713 spin_lock(&mirror->lock); 714 report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now); 715 nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); 716 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 717 spin_unlock(&mirror->lock); 718 719 if (report) 720 pnfs_report_layoutstat(inode, nfs_io_gfp_mask()); 721 } 722 723 static void 724 nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, 725 struct nfs4_ff_layout_mirror *mirror, 726 __u64 requested, 727 __u64 completed, 728 enum nfs3_stable_how committed) 729 { 730 if (committed == NFS_UNSTABLE) 731 requested = completed = 0; 732 733 spin_lock(&mirror->lock); 734 nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat, 735 requested, completed, ktime_get(), task->tk_start); 736 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 737 spin_unlock(&mirror->lock); 738 } 739 740 static void 741 ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, u32 idx) 742 { 743 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); 744 745 if (devid) 746 nfs4_mark_deviceid_unavailable(devid); 747 } 748 749 static void 750 ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, u32 idx) 751 { 752 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); 753 754 if (devid) 755 nfs4_mark_deviceid_available(devid); 756 } 757 758 static struct nfs4_pnfs_ds * 759 ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg, 760 u32 start_idx, u32 *best_idx, 761 bool check_device) 762 { 763 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 764 struct nfs4_ff_layout_mirror *mirror; 765 struct nfs4_pnfs_ds *ds; 766 u32 idx; 767 768 /* mirrors are initially sorted by efficiency */ 769 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { 770 mirror = FF_LAYOUT_COMP(lseg, idx); 771 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false); 772 if (!ds) 773 continue; 774 775 if (check_device && 776 nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node)) 777 continue; 778 779 *best_idx = idx; 780 return ds; 781 } 782 783 return NULL; 784 } 785 786 static struct nfs4_pnfs_ds * 787 ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg, 788 u32 start_idx, u32 *best_idx) 789 { 790 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false); 791 } 792 793 static struct nfs4_pnfs_ds * 794 ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg, 795 u32 start_idx, u32 *best_idx) 796 { 797 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true); 798 } 799 800 static struct nfs4_pnfs_ds * 801 ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg, 802 u32 start_idx, u32 *best_idx) 803 { 804 struct nfs4_pnfs_ds *ds; 805 806 ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx); 807 if (ds) 808 return ds; 809 return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx); 810 } 811 812 static struct nfs4_pnfs_ds * 813 ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio, 814 u32 *best_idx) 815 { 816 struct pnfs_layout_segment *lseg = pgio->pg_lseg; 817 struct nfs4_pnfs_ds *ds; 818 819 ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx, 820 best_idx); 821 if (ds || !pgio->pg_mirror_idx) 822 return ds; 823 return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx); 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 pnfs_put_lseg(pgio->pg_lseg); 832 pgio->pg_lseg = 833 pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), 834 req_offset(req), req->wb_bytes, IOMODE_READ, 835 strict_iomode, nfs_io_gfp_mask()); 836 if (IS_ERR(pgio->pg_lseg)) { 837 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 838 pgio->pg_lseg = NULL; 839 } 840 } 841 842 static void 843 ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, 844 struct nfs_page *req) 845 { 846 struct nfs_pgio_mirror *pgm; 847 struct nfs4_ff_layout_mirror *mirror; 848 struct nfs4_pnfs_ds *ds; 849 u32 ds_idx; 850 851 if (NFS_SERVER(pgio->pg_inode)->flags & 852 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)) 853 pgio->pg_maxretrans = io_maxretrans; 854 retry: 855 pnfs_generic_pg_check_layout(pgio, req); 856 /* Use full layout for now */ 857 if (!pgio->pg_lseg) { 858 ff_layout_pg_get_read(pgio, req, false); 859 if (!pgio->pg_lseg) 860 goto out_nolseg; 861 } 862 if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { 863 ff_layout_pg_get_read(pgio, req, true); 864 if (!pgio->pg_lseg) 865 goto out_nolseg; 866 } 867 /* Reset wb_nio, since getting layout segment was successful */ 868 req->wb_nio = 0; 869 870 ds = ff_layout_get_ds_for_read(pgio, &ds_idx); 871 if (!ds) { 872 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) 873 goto out_mds; 874 pnfs_generic_pg_cleanup(pgio); 875 /* Sleep for 1 second before retrying */ 876 ssleep(1); 877 goto retry; 878 } 879 880 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); 881 pgm = &pgio->pg_mirrors[0]; 882 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; 883 884 pgio->pg_mirror_idx = ds_idx; 885 return; 886 out_nolseg: 887 if (pgio->pg_error < 0) { 888 if (pgio->pg_error != -EAGAIN) 889 return; 890 /* Retry getting layout segment if lower layer returned -EAGAIN */ 891 if (pgio->pg_maxretrans && req->wb_nio++ > pgio->pg_maxretrans) { 892 if (NFS_SERVER(pgio->pg_inode)->flags & NFS_MOUNT_SOFTERR) 893 pgio->pg_error = -ETIMEDOUT; 894 else 895 pgio->pg_error = -EIO; 896 return; 897 } 898 pgio->pg_error = 0; 899 /* Sleep for 1 second before retrying */ 900 ssleep(1); 901 goto retry; 902 } 903 out_mds: 904 trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode, 905 0, NFS4_MAX_UINT64, IOMODE_READ, 906 NFS_I(pgio->pg_inode)->layout, 907 pgio->pg_lseg); 908 pgio->pg_maxretrans = 0; 909 nfs_pageio_reset_read_mds(pgio); 910 } 911 912 static void 913 ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, 914 struct nfs_page *req) 915 { 916 struct nfs4_ff_layout_mirror *mirror; 917 struct nfs_pgio_mirror *pgm; 918 struct nfs4_pnfs_ds *ds; 919 u32 i; 920 921 retry: 922 pnfs_generic_pg_check_layout(pgio, req); 923 if (!pgio->pg_lseg) { 924 pgio->pg_lseg = 925 pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), 926 req_offset(req), req->wb_bytes, 927 IOMODE_RW, false, nfs_io_gfp_mask()); 928 if (IS_ERR(pgio->pg_lseg)) { 929 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 930 pgio->pg_lseg = NULL; 931 return; 932 } 933 } 934 /* If no lseg, fall back to write through mds */ 935 if (pgio->pg_lseg == NULL) 936 goto out_mds; 937 938 /* Use a direct mapping of ds_idx to pgio mirror_idx */ 939 if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg)) 940 goto out_eagain; 941 942 for (i = 0; i < pgio->pg_mirror_count; i++) { 943 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); 944 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true); 945 if (!ds) { 946 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) 947 goto out_mds; 948 pnfs_generic_pg_cleanup(pgio); 949 /* Sleep for 1 second before retrying */ 950 ssleep(1); 951 goto retry; 952 } 953 pgm = &pgio->pg_mirrors[i]; 954 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; 955 } 956 957 if (NFS_SERVER(pgio->pg_inode)->flags & 958 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)) 959 pgio->pg_maxretrans = io_maxretrans; 960 return; 961 out_eagain: 962 pnfs_generic_pg_cleanup(pgio); 963 pgio->pg_error = -EAGAIN; 964 return; 965 out_mds: 966 trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode, 967 0, NFS4_MAX_UINT64, IOMODE_RW, 968 NFS_I(pgio->pg_inode)->layout, 969 pgio->pg_lseg); 970 pgio->pg_maxretrans = 0; 971 nfs_pageio_reset_write_mds(pgio); 972 pgio->pg_error = -EAGAIN; 973 } 974 975 static unsigned int 976 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, 977 struct nfs_page *req) 978 { 979 if (!pgio->pg_lseg) { 980 pgio->pg_lseg = 981 pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), 982 req_offset(req), req->wb_bytes, 983 IOMODE_RW, false, nfs_io_gfp_mask()); 984 if (IS_ERR(pgio->pg_lseg)) { 985 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 986 pgio->pg_lseg = NULL; 987 goto out; 988 } 989 } 990 if (pgio->pg_lseg) 991 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); 992 993 trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode, 994 0, NFS4_MAX_UINT64, IOMODE_RW, 995 NFS_I(pgio->pg_inode)->layout, 996 pgio->pg_lseg); 997 /* no lseg means that pnfs is not in use, so no mirroring here */ 998 nfs_pageio_reset_write_mds(pgio); 999 out: 1000 return 1; 1001 } 1002 1003 static u32 1004 ff_layout_pg_set_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx) 1005 { 1006 u32 old = desc->pg_mirror_idx; 1007 1008 desc->pg_mirror_idx = idx; 1009 return old; 1010 } 1011 1012 static struct nfs_pgio_mirror * 1013 ff_layout_pg_get_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx) 1014 { 1015 return &desc->pg_mirrors[idx]; 1016 } 1017 1018 static const struct nfs_pageio_ops ff_layout_pg_read_ops = { 1019 .pg_init = ff_layout_pg_init_read, 1020 .pg_test = pnfs_generic_pg_test, 1021 .pg_doio = pnfs_generic_pg_readpages, 1022 .pg_cleanup = pnfs_generic_pg_cleanup, 1023 }; 1024 1025 static const struct nfs_pageio_ops ff_layout_pg_write_ops = { 1026 .pg_init = ff_layout_pg_init_write, 1027 .pg_test = pnfs_generic_pg_test, 1028 .pg_doio = pnfs_generic_pg_writepages, 1029 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, 1030 .pg_cleanup = pnfs_generic_pg_cleanup, 1031 .pg_get_mirror = ff_layout_pg_get_mirror_write, 1032 .pg_set_mirror = ff_layout_pg_set_mirror_write, 1033 }; 1034 1035 static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) 1036 { 1037 struct rpc_task *task = &hdr->task; 1038 1039 pnfs_layoutcommit_inode(hdr->inode, false); 1040 1041 if (retry_pnfs) { 1042 dprintk("%s Reset task %5u for i/o through pNFS " 1043 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1044 hdr->task.tk_pid, 1045 hdr->inode->i_sb->s_id, 1046 (unsigned long long)NFS_FILEID(hdr->inode), 1047 hdr->args.count, 1048 (unsigned long long)hdr->args.offset); 1049 1050 hdr->completion_ops->reschedule_io(hdr); 1051 return; 1052 } 1053 1054 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { 1055 dprintk("%s Reset task %5u for i/o through MDS " 1056 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1057 hdr->task.tk_pid, 1058 hdr->inode->i_sb->s_id, 1059 (unsigned long long)NFS_FILEID(hdr->inode), 1060 hdr->args.count, 1061 (unsigned long long)hdr->args.offset); 1062 1063 trace_pnfs_mds_fallback_write_done(hdr->inode, 1064 hdr->args.offset, hdr->args.count, 1065 IOMODE_RW, NFS_I(hdr->inode)->layout, 1066 hdr->lseg); 1067 task->tk_status = pnfs_write_done_resend_to_mds(hdr); 1068 } 1069 } 1070 1071 static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr) 1072 { 1073 u32 idx = hdr->pgio_mirror_idx + 1; 1074 u32 new_idx = 0; 1075 1076 if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx, &new_idx)) 1077 ff_layout_send_layouterror(hdr->lseg); 1078 else 1079 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg); 1080 pnfs_read_resend_pnfs(hdr, new_idx); 1081 } 1082 1083 static void ff_layout_reset_read(struct nfs_pgio_header *hdr) 1084 { 1085 struct rpc_task *task = &hdr->task; 1086 1087 pnfs_layoutcommit_inode(hdr->inode, false); 1088 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg); 1089 1090 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { 1091 dprintk("%s Reset task %5u for i/o through MDS " 1092 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1093 hdr->task.tk_pid, 1094 hdr->inode->i_sb->s_id, 1095 (unsigned long long)NFS_FILEID(hdr->inode), 1096 hdr->args.count, 1097 (unsigned long long)hdr->args.offset); 1098 1099 trace_pnfs_mds_fallback_read_done(hdr->inode, 1100 hdr->args.offset, hdr->args.count, 1101 IOMODE_READ, NFS_I(hdr->inode)->layout, 1102 hdr->lseg); 1103 task->tk_status = pnfs_read_done_resend_to_mds(hdr); 1104 } 1105 } 1106 1107 static int ff_layout_async_handle_error_v4(struct rpc_task *task, 1108 u32 op_status, 1109 struct nfs4_state *state, 1110 struct nfs_client *clp, 1111 struct pnfs_layout_segment *lseg, 1112 u32 idx) 1113 { 1114 struct pnfs_layout_hdr *lo = lseg->pls_layout; 1115 struct inode *inode = lo->plh_inode; 1116 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); 1117 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; 1118 1119 switch (op_status) { 1120 case NFS4_OK: 1121 case NFS4ERR_NXIO: 1122 break; 1123 case NFSERR_PERM: 1124 if (!task->tk_xprt) 1125 break; 1126 xprt_force_disconnect(task->tk_xprt); 1127 goto out_retry; 1128 case NFS4ERR_BADSESSION: 1129 case NFS4ERR_BADSLOT: 1130 case NFS4ERR_BAD_HIGH_SLOT: 1131 case NFS4ERR_DEADSESSION: 1132 case NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1133 case NFS4ERR_SEQ_FALSE_RETRY: 1134 case NFS4ERR_SEQ_MISORDERED: 1135 dprintk("%s ERROR %d, Reset session. Exchangeid " 1136 "flags 0x%x\n", __func__, task->tk_status, 1137 clp->cl_exchange_flags); 1138 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); 1139 goto out_retry; 1140 case NFS4ERR_DELAY: 1141 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1142 fallthrough; 1143 case NFS4ERR_GRACE: 1144 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); 1145 goto out_retry; 1146 case NFS4ERR_RETRY_UNCACHED_REP: 1147 goto out_retry; 1148 /* Invalidate Layout errors */ 1149 case NFS4ERR_PNFS_NO_LAYOUT: 1150 case NFS4ERR_STALE: 1151 case NFS4ERR_BADHANDLE: 1152 case NFS4ERR_ISDIR: 1153 case NFS4ERR_FHEXPIRED: 1154 case NFS4ERR_WRONG_TYPE: 1155 dprintk("%s Invalid layout error %d\n", __func__, 1156 task->tk_status); 1157 /* 1158 * Destroy layout so new i/o will get a new layout. 1159 * Layout will not be destroyed until all current lseg 1160 * references are put. Mark layout as invalid to resend failed 1161 * i/o and all i/o waiting on the slot table to the MDS until 1162 * layout is destroyed and a new valid layout is obtained. 1163 */ 1164 pnfs_destroy_layout(NFS_I(inode)); 1165 rpc_wake_up(&tbl->slot_tbl_waitq); 1166 goto reset; 1167 default: 1168 break; 1169 } 1170 1171 switch (task->tk_status) { 1172 /* RPC connection errors */ 1173 case -ENETDOWN: 1174 case -ENETUNREACH: 1175 if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags)) 1176 return -NFS4ERR_FATAL_IOERROR; 1177 fallthrough; 1178 case -ECONNREFUSED: 1179 case -EHOSTDOWN: 1180 case -EHOSTUNREACH: 1181 case -EIO: 1182 case -ETIMEDOUT: 1183 case -EPIPE: 1184 case -EPROTO: 1185 case -ENODEV: 1186 dprintk("%s DS connection error %d\n", __func__, 1187 task->tk_status); 1188 nfs4_delete_deviceid(devid->ld, devid->nfs_client, 1189 &devid->deviceid); 1190 rpc_wake_up(&tbl->slot_tbl_waitq); 1191 break; 1192 default: 1193 break; 1194 } 1195 1196 if (ff_layout_avoid_mds_available_ds(lseg)) 1197 return -NFS4ERR_RESET_TO_PNFS; 1198 reset: 1199 dprintk("%s Retry through MDS. Error %d\n", __func__, 1200 task->tk_status); 1201 return -NFS4ERR_RESET_TO_MDS; 1202 1203 out_retry: 1204 task->tk_status = 0; 1205 return -EAGAIN; 1206 } 1207 1208 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ 1209 static int ff_layout_async_handle_error_v3(struct rpc_task *task, 1210 u32 op_status, 1211 struct nfs_client *clp, 1212 struct pnfs_layout_segment *lseg, 1213 u32 idx) 1214 { 1215 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); 1216 1217 switch (op_status) { 1218 case NFS_OK: 1219 case NFSERR_NXIO: 1220 break; 1221 case NFSERR_PERM: 1222 if (!task->tk_xprt) 1223 break; 1224 xprt_force_disconnect(task->tk_xprt); 1225 goto out_retry; 1226 case NFSERR_ACCES: 1227 case NFSERR_BADHANDLE: 1228 case NFSERR_FBIG: 1229 case NFSERR_IO: 1230 case NFSERR_NOSPC: 1231 case NFSERR_ROFS: 1232 case NFSERR_STALE: 1233 goto out_reset_to_pnfs; 1234 case NFSERR_JUKEBOX: 1235 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1236 goto out_retry; 1237 default: 1238 break; 1239 } 1240 1241 switch (task->tk_status) { 1242 /* File access problems. Don't mark the device as unavailable */ 1243 case -EACCES: 1244 case -ESTALE: 1245 case -EISDIR: 1246 case -EBADHANDLE: 1247 case -ELOOP: 1248 case -ENOSPC: 1249 break; 1250 case -EJUKEBOX: 1251 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1252 goto out_retry; 1253 case -ENETDOWN: 1254 case -ENETUNREACH: 1255 if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags)) 1256 return -NFS4ERR_FATAL_IOERROR; 1257 fallthrough; 1258 default: 1259 dprintk("%s DS connection error %d\n", __func__, 1260 task->tk_status); 1261 nfs4_delete_deviceid(devid->ld, devid->nfs_client, 1262 &devid->deviceid); 1263 } 1264 out_reset_to_pnfs: 1265 /* FIXME: Need to prevent infinite looping here. */ 1266 return -NFS4ERR_RESET_TO_PNFS; 1267 out_retry: 1268 task->tk_status = 0; 1269 rpc_restart_call_prepare(task); 1270 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 1271 return -EAGAIN; 1272 } 1273 1274 static int ff_layout_async_handle_error(struct rpc_task *task, 1275 u32 op_status, 1276 struct nfs4_state *state, 1277 struct nfs_client *clp, 1278 struct pnfs_layout_segment *lseg, 1279 u32 idx) 1280 { 1281 int vers = clp->cl_nfs_mod->rpc_vers->number; 1282 1283 if (task->tk_status >= 0) { 1284 ff_layout_mark_ds_reachable(lseg, idx); 1285 return 0; 1286 } 1287 1288 /* Handle the case of an invalid layout segment */ 1289 if (!pnfs_is_valid_lseg(lseg)) 1290 return -NFS4ERR_RESET_TO_PNFS; 1291 1292 switch (vers) { 1293 case 3: 1294 return ff_layout_async_handle_error_v3(task, op_status, clp, 1295 lseg, idx); 1296 case 4: 1297 return ff_layout_async_handle_error_v4(task, op_status, state, 1298 clp, lseg, idx); 1299 default: 1300 /* should never happen */ 1301 WARN_ON_ONCE(1); 1302 return 0; 1303 } 1304 } 1305 1306 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, 1307 u32 idx, u64 offset, u64 length, 1308 u32 *op_status, int opnum, int error) 1309 { 1310 struct nfs4_ff_layout_mirror *mirror; 1311 u32 status = *op_status; 1312 int err; 1313 1314 if (status == 0) { 1315 switch (error) { 1316 case -ETIMEDOUT: 1317 case -EPFNOSUPPORT: 1318 case -EPROTONOSUPPORT: 1319 case -EOPNOTSUPP: 1320 case -EINVAL: 1321 case -ECONNREFUSED: 1322 case -ECONNRESET: 1323 case -EHOSTDOWN: 1324 case -EHOSTUNREACH: 1325 case -ENETDOWN: 1326 case -ENETUNREACH: 1327 case -EADDRINUSE: 1328 case -ENOBUFS: 1329 case -EPIPE: 1330 case -EPERM: 1331 case -EPROTO: 1332 case -ENODEV: 1333 *op_status = status = NFS4ERR_NXIO; 1334 break; 1335 case -EACCES: 1336 *op_status = status = NFS4ERR_ACCESS; 1337 break; 1338 default: 1339 return; 1340 } 1341 } 1342 1343 mirror = FF_LAYOUT_COMP(lseg, idx); 1344 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), 1345 mirror, offset, length, status, opnum, 1346 nfs_io_gfp_mask()); 1347 1348 switch (status) { 1349 case NFS4ERR_DELAY: 1350 case NFS4ERR_GRACE: 1351 case NFS4ERR_PERM: 1352 break; 1353 case NFS4ERR_NXIO: 1354 ff_layout_mark_ds_unreachable(lseg, idx); 1355 /* 1356 * Don't return the layout if this is a read and we still 1357 * have layouts to try 1358 */ 1359 if (opnum == OP_READ) 1360 break; 1361 fallthrough; 1362 default: 1363 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, 1364 lseg); 1365 } 1366 1367 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); 1368 } 1369 1370 /* NFS_PROTO call done callback routines */ 1371 static int ff_layout_read_done_cb(struct rpc_task *task, 1372 struct nfs_pgio_header *hdr) 1373 { 1374 int err; 1375 1376 if (task->tk_status < 0) { 1377 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, 1378 hdr->args.offset, hdr->args.count, 1379 &hdr->res.op_status, OP_READ, 1380 task->tk_status); 1381 trace_ff_layout_read_error(hdr, task->tk_status); 1382 } 1383 1384 err = ff_layout_async_handle_error(task, hdr->res.op_status, 1385 hdr->args.context->state, 1386 hdr->ds_clp, hdr->lseg, 1387 hdr->pgio_mirror_idx); 1388 1389 trace_nfs4_pnfs_read(hdr, err); 1390 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1391 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1392 switch (err) { 1393 case -NFS4ERR_RESET_TO_PNFS: 1394 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1395 return task->tk_status; 1396 case -NFS4ERR_RESET_TO_MDS: 1397 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1398 return task->tk_status; 1399 case -EAGAIN: 1400 goto out_eagain; 1401 case -NFS4ERR_FATAL_IOERROR: 1402 task->tk_status = -EIO; 1403 return 0; 1404 } 1405 1406 return 0; 1407 out_eagain: 1408 rpc_restart_call_prepare(task); 1409 return -EAGAIN; 1410 } 1411 1412 static bool 1413 ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) 1414 { 1415 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); 1416 } 1417 1418 /* 1419 * We reference the rpc_cred of the first WRITE that triggers the need for 1420 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. 1421 * rfc5661 is not clear about which credential should be used. 1422 * 1423 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so 1424 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 1425 * we always send layoutcommit after DS writes. 1426 */ 1427 static void 1428 ff_layout_set_layoutcommit(struct inode *inode, 1429 struct pnfs_layout_segment *lseg, 1430 loff_t end_offset) 1431 { 1432 if (!ff_layout_need_layoutcommit(lseg)) 1433 return; 1434 1435 pnfs_set_layoutcommit(inode, lseg, end_offset); 1436 dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino, 1437 (unsigned long long) NFS_I(inode)->layout->plh_lwb); 1438 } 1439 1440 static void ff_layout_read_record_layoutstats_start(struct rpc_task *task, 1441 struct nfs_pgio_header *hdr) 1442 { 1443 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) 1444 return; 1445 nfs4_ff_layout_stat_io_start_read(hdr->inode, 1446 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1447 hdr->args.count, 1448 task->tk_start); 1449 } 1450 1451 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, 1452 struct nfs_pgio_header *hdr) 1453 { 1454 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) 1455 return; 1456 nfs4_ff_layout_stat_io_end_read(task, 1457 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1458 hdr->args.count, 1459 hdr->res.count); 1460 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags); 1461 } 1462 1463 static int ff_layout_read_prepare_common(struct rpc_task *task, 1464 struct nfs_pgio_header *hdr) 1465 { 1466 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { 1467 rpc_exit(task, -EIO); 1468 return -EIO; 1469 } 1470 1471 if (!pnfs_is_valid_lseg(hdr->lseg)) { 1472 rpc_exit(task, -EAGAIN); 1473 return -EAGAIN; 1474 } 1475 1476 ff_layout_read_record_layoutstats_start(task, hdr); 1477 return 0; 1478 } 1479 1480 /* 1481 * Call ops for the async read/write cases 1482 * In the case of dense layouts, the offset needs to be reset to its 1483 * original value. 1484 */ 1485 static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) 1486 { 1487 struct nfs_pgio_header *hdr = data; 1488 1489 if (ff_layout_read_prepare_common(task, hdr)) 1490 return; 1491 1492 rpc_call_start(task); 1493 } 1494 1495 static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) 1496 { 1497 struct nfs_pgio_header *hdr = data; 1498 1499 if (nfs4_setup_sequence(hdr->ds_clp, 1500 &hdr->args.seq_args, 1501 &hdr->res.seq_res, 1502 task)) 1503 return; 1504 1505 ff_layout_read_prepare_common(task, hdr); 1506 } 1507 1508 static void ff_layout_read_call_done(struct rpc_task *task, void *data) 1509 { 1510 struct nfs_pgio_header *hdr = data; 1511 1512 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && 1513 task->tk_status == 0) { 1514 nfs4_sequence_done(task, &hdr->res.seq_res); 1515 return; 1516 } 1517 1518 /* Note this may cause RPC to be resent */ 1519 hdr->mds_ops->rpc_call_done(task, hdr); 1520 } 1521 1522 static void ff_layout_read_count_stats(struct rpc_task *task, void *data) 1523 { 1524 struct nfs_pgio_header *hdr = data; 1525 1526 ff_layout_read_record_layoutstats_done(task, hdr); 1527 rpc_count_iostats_metrics(task, 1528 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); 1529 } 1530 1531 static void ff_layout_read_release(void *data) 1532 { 1533 struct nfs_pgio_header *hdr = data; 1534 1535 ff_layout_read_record_layoutstats_done(&hdr->task, hdr); 1536 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) 1537 ff_layout_resend_pnfs_read(hdr); 1538 else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags)) 1539 ff_layout_reset_read(hdr); 1540 pnfs_generic_rw_release(data); 1541 } 1542 1543 1544 static int ff_layout_write_done_cb(struct rpc_task *task, 1545 struct nfs_pgio_header *hdr) 1546 { 1547 loff_t end_offs = 0; 1548 int err; 1549 1550 if (task->tk_status < 0) { 1551 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, 1552 hdr->args.offset, hdr->args.count, 1553 &hdr->res.op_status, OP_WRITE, 1554 task->tk_status); 1555 trace_ff_layout_write_error(hdr, task->tk_status); 1556 } 1557 1558 err = ff_layout_async_handle_error(task, hdr->res.op_status, 1559 hdr->args.context->state, 1560 hdr->ds_clp, hdr->lseg, 1561 hdr->pgio_mirror_idx); 1562 1563 trace_nfs4_pnfs_write(hdr, err); 1564 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1565 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1566 switch (err) { 1567 case -NFS4ERR_RESET_TO_PNFS: 1568 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1569 return task->tk_status; 1570 case -NFS4ERR_RESET_TO_MDS: 1571 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1572 return task->tk_status; 1573 case -EAGAIN: 1574 return -EAGAIN; 1575 case -NFS4ERR_FATAL_IOERROR: 1576 task->tk_status = -EIO; 1577 return 0; 1578 } 1579 1580 if (hdr->res.verf->committed == NFS_FILE_SYNC || 1581 hdr->res.verf->committed == NFS_DATA_SYNC) 1582 end_offs = hdr->mds_offset + (loff_t)hdr->res.count; 1583 1584 /* Note: if the write is unstable, don't set end_offs until commit */ 1585 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); 1586 1587 /* zero out fattr since we don't care DS attr at all */ 1588 hdr->fattr.valid = 0; 1589 if (task->tk_status >= 0) 1590 nfs_writeback_update_inode(hdr); 1591 1592 return 0; 1593 } 1594 1595 static int ff_layout_commit_done_cb(struct rpc_task *task, 1596 struct nfs_commit_data *data) 1597 { 1598 int err; 1599 1600 if (task->tk_status < 0) { 1601 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, 1602 data->args.offset, data->args.count, 1603 &data->res.op_status, OP_COMMIT, 1604 task->tk_status); 1605 trace_ff_layout_commit_error(data, task->tk_status); 1606 } 1607 1608 err = ff_layout_async_handle_error(task, data->res.op_status, 1609 NULL, data->ds_clp, data->lseg, 1610 data->ds_commit_index); 1611 1612 trace_nfs4_pnfs_commit_ds(data, err); 1613 switch (err) { 1614 case -NFS4ERR_RESET_TO_PNFS: 1615 pnfs_generic_prepare_to_resend_writes(data); 1616 return -EAGAIN; 1617 case -NFS4ERR_RESET_TO_MDS: 1618 pnfs_generic_prepare_to_resend_writes(data); 1619 return -EAGAIN; 1620 case -EAGAIN: 1621 rpc_restart_call_prepare(task); 1622 return -EAGAIN; 1623 case -NFS4ERR_FATAL_IOERROR: 1624 task->tk_status = -EIO; 1625 return 0; 1626 } 1627 1628 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb); 1629 1630 return 0; 1631 } 1632 1633 static void ff_layout_write_record_layoutstats_start(struct rpc_task *task, 1634 struct nfs_pgio_header *hdr) 1635 { 1636 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) 1637 return; 1638 nfs4_ff_layout_stat_io_start_write(hdr->inode, 1639 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1640 hdr->args.count, 1641 task->tk_start); 1642 } 1643 1644 static void ff_layout_write_record_layoutstats_done(struct rpc_task *task, 1645 struct nfs_pgio_header *hdr) 1646 { 1647 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) 1648 return; 1649 nfs4_ff_layout_stat_io_end_write(task, 1650 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), 1651 hdr->args.count, hdr->res.count, 1652 hdr->res.verf->committed); 1653 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags); 1654 } 1655 1656 static int ff_layout_write_prepare_common(struct rpc_task *task, 1657 struct nfs_pgio_header *hdr) 1658 { 1659 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { 1660 rpc_exit(task, -EIO); 1661 return -EIO; 1662 } 1663 1664 if (!pnfs_is_valid_lseg(hdr->lseg)) { 1665 rpc_exit(task, -EAGAIN); 1666 return -EAGAIN; 1667 } 1668 1669 ff_layout_write_record_layoutstats_start(task, hdr); 1670 return 0; 1671 } 1672 1673 static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) 1674 { 1675 struct nfs_pgio_header *hdr = data; 1676 1677 if (ff_layout_write_prepare_common(task, hdr)) 1678 return; 1679 1680 rpc_call_start(task); 1681 } 1682 1683 static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) 1684 { 1685 struct nfs_pgio_header *hdr = data; 1686 1687 if (nfs4_setup_sequence(hdr->ds_clp, 1688 &hdr->args.seq_args, 1689 &hdr->res.seq_res, 1690 task)) 1691 return; 1692 1693 ff_layout_write_prepare_common(task, hdr); 1694 } 1695 1696 static void ff_layout_write_call_done(struct rpc_task *task, void *data) 1697 { 1698 struct nfs_pgio_header *hdr = data; 1699 1700 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && 1701 task->tk_status == 0) { 1702 nfs4_sequence_done(task, &hdr->res.seq_res); 1703 return; 1704 } 1705 1706 /* Note this may cause RPC to be resent */ 1707 hdr->mds_ops->rpc_call_done(task, hdr); 1708 } 1709 1710 static void ff_layout_write_count_stats(struct rpc_task *task, void *data) 1711 { 1712 struct nfs_pgio_header *hdr = data; 1713 1714 ff_layout_write_record_layoutstats_done(task, hdr); 1715 rpc_count_iostats_metrics(task, 1716 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); 1717 } 1718 1719 static void ff_layout_write_release(void *data) 1720 { 1721 struct nfs_pgio_header *hdr = data; 1722 1723 ff_layout_write_record_layoutstats_done(&hdr->task, hdr); 1724 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) { 1725 ff_layout_send_layouterror(hdr->lseg); 1726 ff_layout_reset_write(hdr, true); 1727 } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags)) 1728 ff_layout_reset_write(hdr, false); 1729 pnfs_generic_rw_release(data); 1730 } 1731 1732 static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task, 1733 struct nfs_commit_data *cdata) 1734 { 1735 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags)) 1736 return; 1737 nfs4_ff_layout_stat_io_start_write(cdata->inode, 1738 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), 1739 0, task->tk_start); 1740 } 1741 1742 static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task, 1743 struct nfs_commit_data *cdata) 1744 { 1745 struct nfs_page *req; 1746 __u64 count = 0; 1747 1748 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags)) 1749 return; 1750 1751 if (task->tk_status == 0) { 1752 list_for_each_entry(req, &cdata->pages, wb_list) 1753 count += req->wb_bytes; 1754 } 1755 nfs4_ff_layout_stat_io_end_write(task, 1756 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), 1757 count, count, NFS_FILE_SYNC); 1758 set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags); 1759 } 1760 1761 static int ff_layout_commit_prepare_common(struct rpc_task *task, 1762 struct nfs_commit_data *cdata) 1763 { 1764 if (!pnfs_is_valid_lseg(cdata->lseg)) { 1765 rpc_exit(task, -EAGAIN); 1766 return -EAGAIN; 1767 } 1768 1769 ff_layout_commit_record_layoutstats_start(task, cdata); 1770 return 0; 1771 } 1772 1773 static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) 1774 { 1775 if (ff_layout_commit_prepare_common(task, data)) 1776 return; 1777 1778 rpc_call_start(task); 1779 } 1780 1781 static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) 1782 { 1783 struct nfs_commit_data *wdata = data; 1784 1785 if (nfs4_setup_sequence(wdata->ds_clp, 1786 &wdata->args.seq_args, 1787 &wdata->res.seq_res, 1788 task)) 1789 return; 1790 ff_layout_commit_prepare_common(task, data); 1791 } 1792 1793 static void ff_layout_commit_done(struct rpc_task *task, void *data) 1794 { 1795 pnfs_generic_write_commit_done(task, data); 1796 } 1797 1798 static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) 1799 { 1800 struct nfs_commit_data *cdata = data; 1801 1802 ff_layout_commit_record_layoutstats_done(task, cdata); 1803 rpc_count_iostats_metrics(task, 1804 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); 1805 } 1806 1807 static void ff_layout_commit_release(void *data) 1808 { 1809 struct nfs_commit_data *cdata = data; 1810 1811 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata); 1812 pnfs_generic_commit_release(data); 1813 } 1814 1815 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { 1816 .rpc_call_prepare = ff_layout_read_prepare_v3, 1817 .rpc_call_done = ff_layout_read_call_done, 1818 .rpc_count_stats = ff_layout_read_count_stats, 1819 .rpc_release = ff_layout_read_release, 1820 }; 1821 1822 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { 1823 .rpc_call_prepare = ff_layout_read_prepare_v4, 1824 .rpc_call_done = ff_layout_read_call_done, 1825 .rpc_count_stats = ff_layout_read_count_stats, 1826 .rpc_release = ff_layout_read_release, 1827 }; 1828 1829 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { 1830 .rpc_call_prepare = ff_layout_write_prepare_v3, 1831 .rpc_call_done = ff_layout_write_call_done, 1832 .rpc_count_stats = ff_layout_write_count_stats, 1833 .rpc_release = ff_layout_write_release, 1834 }; 1835 1836 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { 1837 .rpc_call_prepare = ff_layout_write_prepare_v4, 1838 .rpc_call_done = ff_layout_write_call_done, 1839 .rpc_count_stats = ff_layout_write_count_stats, 1840 .rpc_release = ff_layout_write_release, 1841 }; 1842 1843 static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { 1844 .rpc_call_prepare = ff_layout_commit_prepare_v3, 1845 .rpc_call_done = ff_layout_commit_done, 1846 .rpc_count_stats = ff_layout_commit_count_stats, 1847 .rpc_release = ff_layout_commit_release, 1848 }; 1849 1850 static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { 1851 .rpc_call_prepare = ff_layout_commit_prepare_v4, 1852 .rpc_call_done = ff_layout_commit_done, 1853 .rpc_count_stats = ff_layout_commit_count_stats, 1854 .rpc_release = ff_layout_commit_release, 1855 }; 1856 1857 static enum pnfs_try_status 1858 ff_layout_read_pagelist(struct nfs_pgio_header *hdr) 1859 { 1860 struct pnfs_layout_segment *lseg = hdr->lseg; 1861 struct nfs4_pnfs_ds *ds; 1862 struct rpc_clnt *ds_clnt; 1863 struct nfsd_file *localio; 1864 struct nfs4_ff_layout_mirror *mirror; 1865 const struct cred *ds_cred; 1866 loff_t offset = hdr->args.offset; 1867 u32 idx = hdr->pgio_mirror_idx; 1868 int vers; 1869 struct nfs_fh *fh; 1870 1871 dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n", 1872 __func__, hdr->inode->i_ino, 1873 hdr->args.pgbase, (size_t)hdr->args.count, offset); 1874 1875 mirror = FF_LAYOUT_COMP(lseg, idx); 1876 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false); 1877 if (!ds) 1878 goto out_failed; 1879 1880 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, 1881 hdr->inode); 1882 if (IS_ERR(ds_clnt)) 1883 goto out_failed; 1884 1885 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred); 1886 if (!ds_cred) 1887 goto out_failed; 1888 1889 vers = nfs4_ff_layout_ds_version(mirror); 1890 1891 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, 1892 ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers); 1893 1894 hdr->pgio_done_cb = ff_layout_read_done_cb; 1895 refcount_inc(&ds->ds_clp->cl_count); 1896 hdr->ds_clp = ds->ds_clp; 1897 fh = nfs4_ff_layout_select_ds_fh(mirror); 1898 if (fh) 1899 hdr->args.fh = fh; 1900 1901 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid); 1902 1903 /* 1904 * Note that if we ever decide to split across DSes, 1905 * then we may need to handle dense-like offsets. 1906 */ 1907 hdr->args.offset = offset; 1908 hdr->mds_offset = offset; 1909 1910 /* Start IO accounting for local read */ 1911 localio = ff_local_open_fh(lseg, idx, ds->ds_clp, ds_cred, fh, FMODE_READ); 1912 if (localio) { 1913 hdr->task.tk_start = ktime_get(); 1914 ff_layout_read_record_layoutstats_start(&hdr->task, hdr); 1915 } 1916 1917 /* Perform an asynchronous read to ds */ 1918 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, 1919 vers == 3 ? &ff_layout_read_call_ops_v3 : 1920 &ff_layout_read_call_ops_v4, 1921 0, RPC_TASK_SOFTCONN, localio); 1922 put_cred(ds_cred); 1923 return PNFS_ATTEMPTED; 1924 1925 out_failed: 1926 if (ff_layout_avoid_mds_available_ds(lseg)) 1927 return PNFS_TRY_AGAIN; 1928 trace_pnfs_mds_fallback_read_pagelist(hdr->inode, 1929 hdr->args.offset, hdr->args.count, 1930 IOMODE_READ, NFS_I(hdr->inode)->layout, lseg); 1931 return PNFS_NOT_ATTEMPTED; 1932 } 1933 1934 /* Perform async writes. */ 1935 static enum pnfs_try_status 1936 ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) 1937 { 1938 struct pnfs_layout_segment *lseg = hdr->lseg; 1939 struct nfs4_pnfs_ds *ds; 1940 struct rpc_clnt *ds_clnt; 1941 struct nfsd_file *localio; 1942 struct nfs4_ff_layout_mirror *mirror; 1943 const struct cred *ds_cred; 1944 loff_t offset = hdr->args.offset; 1945 int vers; 1946 struct nfs_fh *fh; 1947 u32 idx = hdr->pgio_mirror_idx; 1948 1949 mirror = FF_LAYOUT_COMP(lseg, idx); 1950 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true); 1951 if (!ds) 1952 goto out_failed; 1953 1954 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, 1955 hdr->inode); 1956 if (IS_ERR(ds_clnt)) 1957 goto out_failed; 1958 1959 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred); 1960 if (!ds_cred) 1961 goto out_failed; 1962 1963 vers = nfs4_ff_layout_ds_version(mirror); 1964 1965 dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n", 1966 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, 1967 offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), 1968 vers); 1969 1970 hdr->pgio_done_cb = ff_layout_write_done_cb; 1971 refcount_inc(&ds->ds_clp->cl_count); 1972 hdr->ds_clp = ds->ds_clp; 1973 hdr->ds_commit_idx = idx; 1974 fh = nfs4_ff_layout_select_ds_fh(mirror); 1975 if (fh) 1976 hdr->args.fh = fh; 1977 1978 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid); 1979 1980 /* 1981 * Note that if we ever decide to split across DSes, 1982 * then we may need to handle dense-like offsets. 1983 */ 1984 hdr->args.offset = offset; 1985 1986 /* Start IO accounting for local write */ 1987 localio = ff_local_open_fh(lseg, idx, ds->ds_clp, ds_cred, fh, 1988 FMODE_READ|FMODE_WRITE); 1989 if (localio) { 1990 hdr->task.tk_start = ktime_get(); 1991 ff_layout_write_record_layoutstats_start(&hdr->task, hdr); 1992 } 1993 1994 /* Perform an asynchronous write */ 1995 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, 1996 vers == 3 ? &ff_layout_write_call_ops_v3 : 1997 &ff_layout_write_call_ops_v4, 1998 sync, RPC_TASK_SOFTCONN, localio); 1999 put_cred(ds_cred); 2000 return PNFS_ATTEMPTED; 2001 2002 out_failed: 2003 if (ff_layout_avoid_mds_available_ds(lseg)) 2004 return PNFS_TRY_AGAIN; 2005 trace_pnfs_mds_fallback_write_pagelist(hdr->inode, 2006 hdr->args.offset, hdr->args.count, 2007 IOMODE_RW, NFS_I(hdr->inode)->layout, lseg); 2008 return PNFS_NOT_ATTEMPTED; 2009 } 2010 2011 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) 2012 { 2013 return i; 2014 } 2015 2016 static struct nfs_fh * 2017 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) 2018 { 2019 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 2020 2021 /* FIXME: Assume that there is only one NFS version available 2022 * for the DS. 2023 */ 2024 return &flseg->mirror_array[i]->fh_versions[0]; 2025 } 2026 2027 static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) 2028 { 2029 struct pnfs_layout_segment *lseg = data->lseg; 2030 struct nfs4_pnfs_ds *ds; 2031 struct rpc_clnt *ds_clnt; 2032 struct nfsd_file *localio; 2033 struct nfs4_ff_layout_mirror *mirror; 2034 const struct cred *ds_cred; 2035 u32 idx; 2036 int vers, ret; 2037 struct nfs_fh *fh; 2038 2039 if (!lseg || !(pnfs_is_valid_lseg(lseg) || 2040 test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))) 2041 goto out_err; 2042 2043 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); 2044 mirror = FF_LAYOUT_COMP(lseg, idx); 2045 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true); 2046 if (!ds) 2047 goto out_err; 2048 2049 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, 2050 data->inode); 2051 if (IS_ERR(ds_clnt)) 2052 goto out_err; 2053 2054 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred); 2055 if (!ds_cred) 2056 goto out_err; 2057 2058 vers = nfs4_ff_layout_ds_version(mirror); 2059 2060 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, 2061 data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count), 2062 vers); 2063 data->commit_done_cb = ff_layout_commit_done_cb; 2064 data->cred = ds_cred; 2065 refcount_inc(&ds->ds_clp->cl_count); 2066 data->ds_clp = ds->ds_clp; 2067 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); 2068 if (fh) 2069 data->args.fh = fh; 2070 2071 /* Start IO accounting for local commit */ 2072 localio = ff_local_open_fh(lseg, idx, ds->ds_clp, ds_cred, fh, 2073 FMODE_READ|FMODE_WRITE); 2074 if (localio) { 2075 data->task.tk_start = ktime_get(); 2076 ff_layout_commit_record_layoutstats_start(&data->task, data); 2077 } 2078 2079 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, 2080 vers == 3 ? &ff_layout_commit_call_ops_v3 : 2081 &ff_layout_commit_call_ops_v4, 2082 how, RPC_TASK_SOFTCONN, localio); 2083 put_cred(ds_cred); 2084 return ret; 2085 out_err: 2086 pnfs_generic_prepare_to_resend_writes(data); 2087 pnfs_generic_commit_release(data); 2088 return -EAGAIN; 2089 } 2090 2091 static int 2092 ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, 2093 int how, struct nfs_commit_info *cinfo) 2094 { 2095 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, 2096 ff_layout_initiate_commit); 2097 } 2098 2099 static bool ff_layout_match_rw(const struct rpc_task *task, 2100 const struct nfs_pgio_header *hdr, 2101 const struct pnfs_layout_segment *lseg) 2102 { 2103 return hdr->lseg == lseg; 2104 } 2105 2106 static bool ff_layout_match_commit(const struct rpc_task *task, 2107 const struct nfs_commit_data *cdata, 2108 const struct pnfs_layout_segment *lseg) 2109 { 2110 return cdata->lseg == lseg; 2111 } 2112 2113 static bool ff_layout_match_io(const struct rpc_task *task, const void *data) 2114 { 2115 const struct rpc_call_ops *ops = task->tk_ops; 2116 2117 if (ops == &ff_layout_read_call_ops_v3 || 2118 ops == &ff_layout_read_call_ops_v4 || 2119 ops == &ff_layout_write_call_ops_v3 || 2120 ops == &ff_layout_write_call_ops_v4) 2121 return ff_layout_match_rw(task, task->tk_calldata, data); 2122 if (ops == &ff_layout_commit_call_ops_v3 || 2123 ops == &ff_layout_commit_call_ops_v4) 2124 return ff_layout_match_commit(task, task->tk_calldata, data); 2125 return false; 2126 } 2127 2128 static void ff_layout_cancel_io(struct pnfs_layout_segment *lseg) 2129 { 2130 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 2131 struct nfs4_ff_layout_mirror *mirror; 2132 struct nfs4_ff_layout_ds *mirror_ds; 2133 struct nfs4_pnfs_ds *ds; 2134 struct nfs_client *ds_clp; 2135 struct rpc_clnt *clnt; 2136 u32 idx; 2137 2138 for (idx = 0; idx < flseg->mirror_array_cnt; idx++) { 2139 mirror = flseg->mirror_array[idx]; 2140 mirror_ds = mirror->mirror_ds; 2141 if (IS_ERR_OR_NULL(mirror_ds)) 2142 continue; 2143 ds = mirror->mirror_ds->ds; 2144 if (!ds) 2145 continue; 2146 ds_clp = ds->ds_clp; 2147 if (!ds_clp) 2148 continue; 2149 clnt = ds_clp->cl_rpcclient; 2150 if (!clnt) 2151 continue; 2152 if (!rpc_cancel_tasks(clnt, -EAGAIN, ff_layout_match_io, lseg)) 2153 continue; 2154 rpc_clnt_disconnect(clnt); 2155 } 2156 } 2157 2158 static struct pnfs_ds_commit_info * 2159 ff_layout_get_ds_info(struct inode *inode) 2160 { 2161 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; 2162 2163 if (layout == NULL) 2164 return NULL; 2165 2166 return &FF_LAYOUT_FROM_HDR(layout)->commit_info; 2167 } 2168 2169 static void 2170 ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, 2171 struct pnfs_layout_segment *lseg) 2172 { 2173 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 2174 struct inode *inode = lseg->pls_layout->plh_inode; 2175 struct pnfs_commit_array *array, *new; 2176 2177 new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, 2178 nfs_io_gfp_mask()); 2179 if (new) { 2180 spin_lock(&inode->i_lock); 2181 array = pnfs_add_commit_array(fl_cinfo, new, lseg); 2182 spin_unlock(&inode->i_lock); 2183 if (array != new) 2184 pnfs_free_commit_array(new); 2185 } 2186 } 2187 2188 static void 2189 ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, 2190 struct inode *inode) 2191 { 2192 spin_lock(&inode->i_lock); 2193 pnfs_generic_ds_cinfo_destroy(fl_cinfo); 2194 spin_unlock(&inode->i_lock); 2195 } 2196 2197 static void 2198 ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) 2199 { 2200 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, 2201 id_node)); 2202 } 2203 2204 static int ff_layout_encode_ioerr(struct xdr_stream *xdr, 2205 const struct nfs4_layoutreturn_args *args, 2206 const struct nfs4_flexfile_layoutreturn_args *ff_args) 2207 { 2208 __be32 *start; 2209 2210 start = xdr_reserve_space(xdr, 4); 2211 if (unlikely(!start)) 2212 return -E2BIG; 2213 2214 *start = cpu_to_be32(ff_args->num_errors); 2215 /* This assume we always return _ALL_ layouts */ 2216 return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors); 2217 } 2218 2219 static void 2220 ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr, 2221 const nfs4_stateid *stateid, 2222 const struct nfs42_layoutstat_devinfo *devinfo) 2223 { 2224 __be32 *p; 2225 2226 p = xdr_reserve_space(xdr, 8 + 8); 2227 p = xdr_encode_hyper(p, devinfo->offset); 2228 p = xdr_encode_hyper(p, devinfo->length); 2229 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); 2230 p = xdr_reserve_space(xdr, 4*8); 2231 p = xdr_encode_hyper(p, devinfo->read_count); 2232 p = xdr_encode_hyper(p, devinfo->read_bytes); 2233 p = xdr_encode_hyper(p, devinfo->write_count); 2234 p = xdr_encode_hyper(p, devinfo->write_bytes); 2235 encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE); 2236 } 2237 2238 static void 2239 ff_layout_encode_ff_iostat(struct xdr_stream *xdr, 2240 const nfs4_stateid *stateid, 2241 const struct nfs42_layoutstat_devinfo *devinfo) 2242 { 2243 ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo); 2244 ff_layout_encode_ff_layoutupdate(xdr, devinfo, 2245 devinfo->ld_private.data); 2246 } 2247 2248 /* report nothing for now */ 2249 static void ff_layout_encode_iostats_array(struct xdr_stream *xdr, 2250 const struct nfs4_layoutreturn_args *args, 2251 struct nfs4_flexfile_layoutreturn_args *ff_args) 2252 { 2253 __be32 *p; 2254 int i; 2255 2256 p = xdr_reserve_space(xdr, 4); 2257 *p = cpu_to_be32(ff_args->num_dev); 2258 for (i = 0; i < ff_args->num_dev; i++) 2259 ff_layout_encode_ff_iostat(xdr, 2260 &args->layout->plh_stateid, 2261 &ff_args->devinfo[i]); 2262 } 2263 2264 static void 2265 ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo, 2266 unsigned int num_entries) 2267 { 2268 unsigned int i; 2269 2270 for (i = 0; i < num_entries; i++) { 2271 if (!devinfo[i].ld_private.ops) 2272 continue; 2273 if (!devinfo[i].ld_private.ops->free) 2274 continue; 2275 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); 2276 } 2277 } 2278 2279 static struct nfs4_deviceid_node * 2280 ff_layout_alloc_deviceid_node(struct nfs_server *server, 2281 struct pnfs_device *pdev, gfp_t gfp_flags) 2282 { 2283 struct nfs4_ff_layout_ds *dsaddr; 2284 2285 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); 2286 if (!dsaddr) 2287 return NULL; 2288 return &dsaddr->id_node; 2289 } 2290 2291 static void 2292 ff_layout_encode_layoutreturn(struct xdr_stream *xdr, 2293 const void *voidargs, 2294 const struct nfs4_xdr_opaque_data *ff_opaque) 2295 { 2296 const struct nfs4_layoutreturn_args *args = voidargs; 2297 struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data; 2298 struct xdr_buf tmp_buf = { 2299 .head = { 2300 [0] = { 2301 .iov_base = page_address(ff_args->pages[0]), 2302 }, 2303 }, 2304 .buflen = PAGE_SIZE, 2305 }; 2306 struct xdr_stream tmp_xdr; 2307 __be32 *start; 2308 2309 dprintk("%s: Begin\n", __func__); 2310 2311 xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL); 2312 2313 ff_layout_encode_ioerr(&tmp_xdr, args, ff_args); 2314 ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args); 2315 2316 start = xdr_reserve_space(xdr, 4); 2317 *start = cpu_to_be32(tmp_buf.len); 2318 xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len); 2319 2320 dprintk("%s: Return\n", __func__); 2321 } 2322 2323 static void 2324 ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args) 2325 { 2326 struct nfs4_flexfile_layoutreturn_args *ff_args; 2327 2328 if (!args->data) 2329 return; 2330 ff_args = args->data; 2331 args->data = NULL; 2332 2333 ff_layout_free_ds_ioerr(&ff_args->errors); 2334 ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev); 2335 2336 put_page(ff_args->pages[0]); 2337 kfree(ff_args); 2338 } 2339 2340 static const struct nfs4_xdr_opaque_ops layoutreturn_ops = { 2341 .encode = ff_layout_encode_layoutreturn, 2342 .free = ff_layout_free_layoutreturn, 2343 }; 2344 2345 static int 2346 ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args) 2347 { 2348 struct nfs4_flexfile_layoutreturn_args *ff_args; 2349 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout); 2350 2351 ff_args = kmalloc(sizeof(*ff_args), nfs_io_gfp_mask()); 2352 if (!ff_args) 2353 goto out_nomem; 2354 ff_args->pages[0] = alloc_page(nfs_io_gfp_mask()); 2355 if (!ff_args->pages[0]) 2356 goto out_nomem_free; 2357 2358 INIT_LIST_HEAD(&ff_args->errors); 2359 ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout, 2360 &args->range, &ff_args->errors, 2361 FF_LAYOUTRETURN_MAXERR); 2362 2363 spin_lock(&args->inode->i_lock); 2364 ff_args->num_dev = ff_layout_mirror_prepare_stats( 2365 &ff_layout->generic_hdr, &ff_args->devinfo[0], 2366 ARRAY_SIZE(ff_args->devinfo), NFS4_FF_OP_LAYOUTRETURN); 2367 spin_unlock(&args->inode->i_lock); 2368 2369 args->ld_private->ops = &layoutreturn_ops; 2370 args->ld_private->data = ff_args; 2371 return 0; 2372 out_nomem_free: 2373 kfree(ff_args); 2374 out_nomem: 2375 return -ENOMEM; 2376 } 2377 2378 #ifdef CONFIG_NFS_V4_2 2379 void 2380 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg) 2381 { 2382 struct pnfs_layout_hdr *lo = lseg->pls_layout; 2383 struct nfs42_layout_error *errors; 2384 LIST_HEAD(head); 2385 2386 if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR)) 2387 return; 2388 ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1); 2389 if (list_empty(&head)) 2390 return; 2391 2392 errors = kmalloc_array(NFS42_LAYOUTERROR_MAX, sizeof(*errors), 2393 nfs_io_gfp_mask()); 2394 if (errors != NULL) { 2395 const struct nfs4_ff_layout_ds_err *pos; 2396 size_t n = 0; 2397 2398 list_for_each_entry(pos, &head, list) { 2399 errors[n].offset = pos->offset; 2400 errors[n].length = pos->length; 2401 nfs4_stateid_copy(&errors[n].stateid, &pos->stateid); 2402 errors[n].errors[0].dev_id = pos->deviceid; 2403 errors[n].errors[0].status = pos->status; 2404 errors[n].errors[0].opnum = pos->opnum; 2405 n++; 2406 if (!list_is_last(&pos->list, &head) && 2407 n < NFS42_LAYOUTERROR_MAX) 2408 continue; 2409 if (nfs42_proc_layouterror(lseg, errors, n) < 0) 2410 break; 2411 n = 0; 2412 } 2413 kfree(errors); 2414 } 2415 ff_layout_free_ds_ioerr(&head); 2416 } 2417 #else 2418 void 2419 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg) 2420 { 2421 } 2422 #endif 2423 2424 static int 2425 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) 2426 { 2427 const struct sockaddr_in *sin = (struct sockaddr_in *)sap; 2428 2429 return snprintf(buf, buflen, "%pI4", &sin->sin_addr); 2430 } 2431 2432 static size_t 2433 ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, 2434 const int buflen) 2435 { 2436 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; 2437 const struct in6_addr *addr = &sin6->sin6_addr; 2438 2439 /* 2440 * RFC 4291, Section 2.2.2 2441 * 2442 * Shorthanded ANY address 2443 */ 2444 if (ipv6_addr_any(addr)) 2445 return snprintf(buf, buflen, "::"); 2446 2447 /* 2448 * RFC 4291, Section 2.2.2 2449 * 2450 * Shorthanded loopback address 2451 */ 2452 if (ipv6_addr_loopback(addr)) 2453 return snprintf(buf, buflen, "::1"); 2454 2455 /* 2456 * RFC 4291, Section 2.2.3 2457 * 2458 * Special presentation address format for mapped v4 2459 * addresses. 2460 */ 2461 if (ipv6_addr_v4mapped(addr)) 2462 return snprintf(buf, buflen, "::ffff:%pI4", 2463 &addr->s6_addr32[3]); 2464 2465 /* 2466 * RFC 4291, Section 2.2.1 2467 */ 2468 return snprintf(buf, buflen, "%pI6c", addr); 2469 } 2470 2471 /* Derived from rpc_sockaddr2uaddr */ 2472 static void 2473 ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) 2474 { 2475 struct sockaddr *sap = (struct sockaddr *)&da->da_addr; 2476 char portbuf[RPCBIND_MAXUADDRPLEN]; 2477 char addrbuf[RPCBIND_MAXUADDRLEN]; 2478 unsigned short port; 2479 int len, netid_len; 2480 __be32 *p; 2481 2482 switch (sap->sa_family) { 2483 case AF_INET: 2484 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) 2485 return; 2486 port = ntohs(((struct sockaddr_in *)sap)->sin_port); 2487 break; 2488 case AF_INET6: 2489 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) 2490 return; 2491 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); 2492 break; 2493 default: 2494 WARN_ON_ONCE(1); 2495 return; 2496 } 2497 2498 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); 2499 len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); 2500 2501 netid_len = strlen(da->da_netid); 2502 p = xdr_reserve_space(xdr, 4 + netid_len); 2503 xdr_encode_opaque(p, da->da_netid, netid_len); 2504 2505 p = xdr_reserve_space(xdr, 4 + len); 2506 xdr_encode_opaque(p, addrbuf, len); 2507 } 2508 2509 static void 2510 ff_layout_encode_nfstime(struct xdr_stream *xdr, 2511 ktime_t t) 2512 { 2513 struct timespec64 ts; 2514 __be32 *p; 2515 2516 p = xdr_reserve_space(xdr, 12); 2517 ts = ktime_to_timespec64(t); 2518 p = xdr_encode_hyper(p, ts.tv_sec); 2519 *p++ = cpu_to_be32(ts.tv_nsec); 2520 } 2521 2522 static void 2523 ff_layout_encode_io_latency(struct xdr_stream *xdr, 2524 struct nfs4_ff_io_stat *stat) 2525 { 2526 __be32 *p; 2527 2528 p = xdr_reserve_space(xdr, 5 * 8); 2529 p = xdr_encode_hyper(p, stat->ops_requested); 2530 p = xdr_encode_hyper(p, stat->bytes_requested); 2531 p = xdr_encode_hyper(p, stat->ops_completed); 2532 p = xdr_encode_hyper(p, stat->bytes_completed); 2533 p = xdr_encode_hyper(p, stat->bytes_not_delivered); 2534 ff_layout_encode_nfstime(xdr, stat->total_busy_time); 2535 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); 2536 } 2537 2538 static void 2539 ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr, 2540 const struct nfs42_layoutstat_devinfo *devinfo, 2541 struct nfs4_ff_layout_mirror *mirror) 2542 { 2543 struct nfs4_pnfs_ds_addr *da; 2544 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds; 2545 struct nfs_fh *fh = &mirror->fh_versions[0]; 2546 __be32 *p; 2547 2548 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); 2549 dprintk("%s: DS %s: encoding address %s\n", 2550 __func__, ds->ds_remotestr, da->da_remotestr); 2551 /* netaddr4 */ 2552 ff_layout_encode_netaddr(xdr, da); 2553 /* nfs_fh4 */ 2554 p = xdr_reserve_space(xdr, 4 + fh->size); 2555 xdr_encode_opaque(p, fh->data, fh->size); 2556 /* ff_io_latency4 read */ 2557 spin_lock(&mirror->lock); 2558 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat); 2559 /* ff_io_latency4 write */ 2560 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat); 2561 spin_unlock(&mirror->lock); 2562 /* nfstime4 */ 2563 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time)); 2564 /* bool */ 2565 p = xdr_reserve_space(xdr, 4); 2566 *p = cpu_to_be32(false); 2567 } 2568 2569 static void 2570 ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args, 2571 const struct nfs4_xdr_opaque_data *opaque) 2572 { 2573 struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque, 2574 struct nfs42_layoutstat_devinfo, ld_private); 2575 __be32 *start; 2576 2577 /* layoutupdate length */ 2578 start = xdr_reserve_space(xdr, 4); 2579 ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data); 2580 2581 *start = cpu_to_be32((xdr->p - start - 1) * 4); 2582 } 2583 2584 static void 2585 ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque) 2586 { 2587 struct nfs4_ff_layout_mirror *mirror = opaque->data; 2588 2589 ff_layout_put_mirror(mirror); 2590 } 2591 2592 static const struct nfs4_xdr_opaque_ops layoutstat_ops = { 2593 .encode = ff_layout_encode_layoutstats, 2594 .free = ff_layout_free_layoutstats, 2595 }; 2596 2597 static int 2598 ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, 2599 struct nfs42_layoutstat_devinfo *devinfo, 2600 int dev_limit, enum nfs4_ff_op_type type) 2601 { 2602 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); 2603 struct nfs4_ff_layout_mirror *mirror; 2604 struct nfs4_deviceid_node *dev; 2605 int i = 0; 2606 2607 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { 2608 if (i >= dev_limit) 2609 break; 2610 if (IS_ERR_OR_NULL(mirror->mirror_ds)) 2611 continue; 2612 if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, 2613 &mirror->flags) && 2614 type != NFS4_FF_OP_LAYOUTRETURN) 2615 continue; 2616 /* mirror refcount put in cleanup_layoutstats */ 2617 if (!refcount_inc_not_zero(&mirror->ref)) 2618 continue; 2619 dev = &mirror->mirror_ds->id_node; 2620 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE); 2621 devinfo->offset = 0; 2622 devinfo->length = NFS4_MAX_UINT64; 2623 spin_lock(&mirror->lock); 2624 devinfo->read_count = mirror->read_stat.io_stat.ops_completed; 2625 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed; 2626 devinfo->write_count = mirror->write_stat.io_stat.ops_completed; 2627 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed; 2628 spin_unlock(&mirror->lock); 2629 devinfo->layout_type = LAYOUT_FLEX_FILES; 2630 devinfo->ld_private.ops = &layoutstat_ops; 2631 devinfo->ld_private.data = mirror; 2632 2633 devinfo++; 2634 i++; 2635 } 2636 return i; 2637 } 2638 2639 static int ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) 2640 { 2641 struct pnfs_layout_hdr *lo; 2642 struct nfs4_flexfile_layout *ff_layout; 2643 const int dev_count = PNFS_LAYOUTSTATS_MAXDEV; 2644 2645 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ 2646 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), 2647 nfs_io_gfp_mask()); 2648 if (!args->devinfo) 2649 return -ENOMEM; 2650 2651 spin_lock(&args->inode->i_lock); 2652 lo = NFS_I(args->inode)->layout; 2653 if (lo && pnfs_layout_is_valid(lo)) { 2654 ff_layout = FF_LAYOUT_FROM_HDR(lo); 2655 args->num_dev = ff_layout_mirror_prepare_stats( 2656 &ff_layout->generic_hdr, &args->devinfo[0], dev_count, 2657 NFS4_FF_OP_LAYOUTSTATS); 2658 } else 2659 args->num_dev = 0; 2660 spin_unlock(&args->inode->i_lock); 2661 if (!args->num_dev) { 2662 kfree(args->devinfo); 2663 args->devinfo = NULL; 2664 return -ENOENT; 2665 } 2666 2667 return 0; 2668 } 2669 2670 static int 2671 ff_layout_set_layoutdriver(struct nfs_server *server, 2672 const struct nfs_fh *dummy) 2673 { 2674 #if IS_ENABLED(CONFIG_NFS_V4_2) 2675 server->caps |= NFS_CAP_LAYOUTSTATS | NFS_CAP_REBOOT_LAYOUTRETURN; 2676 #endif 2677 return 0; 2678 } 2679 2680 static const struct pnfs_commit_ops ff_layout_commit_ops = { 2681 .setup_ds_info = ff_layout_setup_ds_info, 2682 .release_ds_info = ff_layout_release_ds_info, 2683 .mark_request_commit = pnfs_layout_mark_request_commit, 2684 .clear_request_commit = pnfs_generic_clear_request_commit, 2685 .scan_commit_lists = pnfs_generic_scan_commit_lists, 2686 .recover_commit_reqs = pnfs_generic_recover_commit_reqs, 2687 .commit_pagelist = ff_layout_commit_pagelist, 2688 }; 2689 2690 static struct pnfs_layoutdriver_type flexfilelayout_type = { 2691 .id = LAYOUT_FLEX_FILES, 2692 .name = "LAYOUT_FLEX_FILES", 2693 .owner = THIS_MODULE, 2694 .flags = PNFS_LAYOUTGET_ON_OPEN, 2695 .max_layoutget_response = 4096, /* 1 page or so... */ 2696 .set_layoutdriver = ff_layout_set_layoutdriver, 2697 .alloc_layout_hdr = ff_layout_alloc_layout_hdr, 2698 .free_layout_hdr = ff_layout_free_layout_hdr, 2699 .alloc_lseg = ff_layout_alloc_lseg, 2700 .free_lseg = ff_layout_free_lseg, 2701 .add_lseg = ff_layout_add_lseg, 2702 .pg_read_ops = &ff_layout_pg_read_ops, 2703 .pg_write_ops = &ff_layout_pg_write_ops, 2704 .get_ds_info = ff_layout_get_ds_info, 2705 .free_deviceid_node = ff_layout_free_deviceid_node, 2706 .read_pagelist = ff_layout_read_pagelist, 2707 .write_pagelist = ff_layout_write_pagelist, 2708 .alloc_deviceid_node = ff_layout_alloc_deviceid_node, 2709 .prepare_layoutreturn = ff_layout_prepare_layoutreturn, 2710 .sync = pnfs_nfs_generic_sync, 2711 .prepare_layoutstats = ff_layout_prepare_layoutstats, 2712 .cancel_io = ff_layout_cancel_io, 2713 }; 2714 2715 static int __init nfs4flexfilelayout_init(void) 2716 { 2717 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", 2718 __func__); 2719 return pnfs_register_layoutdriver(&flexfilelayout_type); 2720 } 2721 2722 static void __exit nfs4flexfilelayout_exit(void) 2723 { 2724 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", 2725 __func__); 2726 pnfs_unregister_layoutdriver(&flexfilelayout_type); 2727 } 2728 2729 MODULE_ALIAS("nfs-layouttype4-4"); 2730 2731 MODULE_LICENSE("GPL"); 2732 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); 2733 2734 module_init(nfs4flexfilelayout_init); 2735 module_exit(nfs4flexfilelayout_exit); 2736 2737 module_param(io_maxretrans, ushort, 0644); 2738 MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client " 2739 "retries an I/O request before returning an error. "); 2740