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_ds_stripe *dss_info); 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_obj(*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, u32 dss_id, 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->dss[dss_id].nfl, mode); 175 #else 176 return NULL; 177 #endif 178 } 179 180 static bool ff_dss_match_fh(const struct nfs4_ff_layout_ds_stripe *dss1, 181 const struct nfs4_ff_layout_ds_stripe *dss2) 182 { 183 int i, j; 184 185 if (dss1->fh_versions_cnt != dss2->fh_versions_cnt) 186 return false; 187 188 for (i = 0; i < dss1->fh_versions_cnt; i++) { 189 bool found_fh = false; 190 for (j = 0; j < dss2->fh_versions_cnt; j++) { 191 if (nfs_compare_fh(&dss1->fh_versions[i], 192 &dss2->fh_versions[j]) == 0) { 193 found_fh = true; 194 break; 195 } 196 } 197 if (!found_fh) 198 return false; 199 } 200 return true; 201 } 202 203 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1, 204 const struct nfs4_ff_layout_mirror *m2) 205 { 206 u32 dss_id; 207 208 if (m1->dss_count != m2->dss_count) 209 return false; 210 211 for (dss_id = 0; dss_id < m1->dss_count; dss_id++) 212 if (!ff_dss_match_fh(&m1->dss[dss_id], &m2->dss[dss_id])) 213 return false; 214 215 return true; 216 } 217 218 static bool ff_mirror_match_devid(const struct nfs4_ff_layout_mirror *m1, 219 const struct nfs4_ff_layout_mirror *m2) 220 { 221 u32 dss_id; 222 223 if (m1->dss_count != m2->dss_count) 224 return false; 225 226 for (dss_id = 0; dss_id < m1->dss_count; dss_id++) 227 if (memcmp(&m1->dss[dss_id].devid, 228 &m2->dss[dss_id].devid, 229 sizeof(m1->dss[dss_id].devid)) != 0) 230 return false; 231 232 return true; 233 } 234 235 static struct nfs4_ff_layout_mirror * 236 ff_layout_add_mirror(struct pnfs_layout_hdr *lo, 237 struct nfs4_ff_layout_mirror *mirror) 238 { 239 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); 240 struct nfs4_ff_layout_mirror *pos; 241 struct inode *inode = lo->plh_inode; 242 243 spin_lock(&inode->i_lock); 244 list_for_each_entry(pos, &ff_layout->mirrors, mirrors) { 245 if (!ff_mirror_match_devid(mirror, pos)) 246 continue; 247 if (!ff_mirror_match_fh(mirror, pos)) 248 continue; 249 if (refcount_inc_not_zero(&pos->ref)) { 250 spin_unlock(&inode->i_lock); 251 return pos; 252 } 253 } 254 list_add(&mirror->mirrors, &ff_layout->mirrors); 255 mirror->layout = lo; 256 spin_unlock(&inode->i_lock); 257 return mirror; 258 } 259 260 static void 261 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror) 262 { 263 struct inode *inode; 264 if (mirror->layout == NULL) 265 return; 266 inode = mirror->layout->plh_inode; 267 spin_lock(&inode->i_lock); 268 list_del(&mirror->mirrors); 269 spin_unlock(&inode->i_lock); 270 mirror->layout = NULL; 271 } 272 273 static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(u32 dss_count, 274 gfp_t gfp_flags) 275 { 276 struct nfs4_ff_layout_mirror *mirror; 277 278 mirror = kzalloc_obj(*mirror, gfp_flags); 279 if (mirror == NULL) 280 return NULL; 281 282 spin_lock_init(&mirror->lock); 283 refcount_set(&mirror->ref, 1); 284 INIT_LIST_HEAD(&mirror->mirrors); 285 286 mirror->dss_count = dss_count; 287 mirror->dss = 288 kzalloc_objs(struct nfs4_ff_layout_ds_stripe, dss_count, 289 gfp_flags); 290 if (mirror->dss == NULL) { 291 kfree(mirror); 292 return NULL; 293 } 294 295 for (u32 dss_id = 0; dss_id < mirror->dss_count; dss_id++) 296 nfs_localio_file_init(&mirror->dss[dss_id].nfl); 297 298 return mirror; 299 } 300 301 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror) 302 { 303 const struct cred *cred; 304 u32 dss_id; 305 306 ff_layout_remove_mirror(mirror); 307 308 for (dss_id = 0; dss_id < mirror->dss_count; dss_id++) { 309 kfree(mirror->dss[dss_id].fh_versions); 310 cred = rcu_access_pointer(mirror->dss[dss_id].ro_cred); 311 put_cred(cred); 312 cred = rcu_access_pointer(mirror->dss[dss_id].rw_cred); 313 put_cred(cred); 314 nfs_close_local_fh(&mirror->dss[dss_id].nfl); 315 nfs4_ff_layout_put_deviceid(mirror->dss[dss_id].mirror_ds); 316 } 317 318 kfree(mirror->dss); 319 kfree(mirror); 320 } 321 322 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror) 323 { 324 if (mirror != NULL && refcount_dec_and_test(&mirror->ref)) 325 ff_layout_free_mirror(mirror); 326 } 327 328 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) 329 { 330 u32 i; 331 332 for (i = 0; i < fls->mirror_array_cnt; i++) 333 ff_layout_put_mirror(fls->mirror_array[i]); 334 } 335 336 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) 337 { 338 if (fls) { 339 ff_layout_free_mirror_array(fls); 340 kfree(fls); 341 } 342 } 343 344 static bool 345 ff_lseg_match_mirrors(struct pnfs_layout_segment *l1, 346 struct pnfs_layout_segment *l2) 347 { 348 const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1); 349 const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l2); 350 u32 i; 351 352 if (fl1->mirror_array_cnt != fl2->mirror_array_cnt) 353 return false; 354 for (i = 0; i < fl1->mirror_array_cnt; i++) { 355 if (fl1->mirror_array[i] != fl2->mirror_array[i]) 356 return false; 357 } 358 return true; 359 } 360 361 static bool 362 ff_lseg_range_is_after(const struct pnfs_layout_range *l1, 363 const struct pnfs_layout_range *l2) 364 { 365 u64 end1, end2; 366 367 if (l1->iomode != l2->iomode) 368 return l1->iomode != IOMODE_READ; 369 end1 = pnfs_calc_offset_end(l1->offset, l1->length); 370 end2 = pnfs_calc_offset_end(l2->offset, l2->length); 371 if (end1 < l2->offset) 372 return false; 373 if (end2 < l1->offset) 374 return true; 375 return l2->offset <= l1->offset; 376 } 377 378 static bool 379 ff_lseg_merge(struct pnfs_layout_segment *new, 380 struct pnfs_layout_segment *old) 381 { 382 u64 new_end, old_end; 383 384 if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags)) 385 return false; 386 if (new->pls_range.iomode != old->pls_range.iomode) 387 return false; 388 old_end = pnfs_calc_offset_end(old->pls_range.offset, 389 old->pls_range.length); 390 if (old_end < new->pls_range.offset) 391 return false; 392 new_end = pnfs_calc_offset_end(new->pls_range.offset, 393 new->pls_range.length); 394 if (new_end < old->pls_range.offset) 395 return false; 396 if (!ff_lseg_match_mirrors(new, old)) 397 return false; 398 399 /* Mergeable: copy info from 'old' to 'new' */ 400 if (new_end < old_end) 401 new_end = old_end; 402 if (new->pls_range.offset < old->pls_range.offset) 403 new->pls_range.offset = old->pls_range.offset; 404 new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset, 405 new_end); 406 if (test_bit(NFS_LSEG_ROC, &old->pls_flags)) 407 set_bit(NFS_LSEG_ROC, &new->pls_flags); 408 return true; 409 } 410 411 static void 412 ff_layout_add_lseg(struct pnfs_layout_hdr *lo, 413 struct pnfs_layout_segment *lseg, 414 struct list_head *free_me) 415 { 416 pnfs_generic_layout_insert_lseg(lo, lseg, 417 ff_lseg_range_is_after, 418 ff_lseg_merge, 419 free_me); 420 } 421 422 static u32 ff_mirror_efficiency_sum(const struct nfs4_ff_layout_mirror *mirror) 423 { 424 u32 dss_id, sum = 0; 425 426 for (dss_id = 0; dss_id < mirror->dss_count; dss_id++) 427 sum += mirror->dss[dss_id].efficiency; 428 429 return sum; 430 } 431 432 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) 433 { 434 int i, j; 435 436 for (i = 0; i < fls->mirror_array_cnt - 1; i++) { 437 for (j = i + 1; j < fls->mirror_array_cnt; j++) 438 if (ff_mirror_efficiency_sum(fls->mirror_array[i]) < 439 ff_mirror_efficiency_sum(fls->mirror_array[j])) 440 swap(fls->mirror_array[i], 441 fls->mirror_array[j]); 442 } 443 } 444 445 static struct pnfs_layout_segment * 446 ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, 447 struct nfs4_layoutget_res *lgr, 448 gfp_t gfp_flags) 449 { 450 struct pnfs_layout_segment *ret; 451 struct nfs4_ff_layout_segment *fls = NULL; 452 struct xdr_stream stream; 453 struct xdr_buf buf; 454 struct folio *scratch; 455 u64 stripe_unit; 456 u32 mirror_array_cnt; 457 __be32 *p; 458 int i, rc; 459 struct nfs4_ff_layout_ds_stripe *dss_info; 460 461 dprintk("--> %s\n", __func__); 462 scratch = folio_alloc(gfp_flags, 0); 463 if (!scratch) 464 return ERR_PTR(-ENOMEM); 465 466 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, 467 lgr->layoutp->len); 468 xdr_set_scratch_folio(&stream, scratch); 469 470 /* stripe unit and mirror_array_cnt */ 471 rc = -EIO; 472 p = xdr_inline_decode(&stream, 8 + 4); 473 if (!p) 474 goto out_err_free; 475 476 p = xdr_decode_hyper(p, &stripe_unit); 477 mirror_array_cnt = be32_to_cpup(p++); 478 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, 479 stripe_unit, mirror_array_cnt); 480 481 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || 482 mirror_array_cnt == 0) 483 goto out_err_free; 484 485 rc = -ENOMEM; 486 fls = kzalloc_flex(*fls, mirror_array, mirror_array_cnt, gfp_flags); 487 if (!fls) 488 goto out_err_free; 489 490 fls->mirror_array_cnt = mirror_array_cnt; 491 fls->stripe_unit = stripe_unit; 492 493 u32 dss_count = 0; 494 for (i = 0; i < fls->mirror_array_cnt; i++) { 495 struct nfs4_ff_layout_mirror *mirror; 496 struct cred *kcred; 497 const struct cred __rcu *cred; 498 kuid_t uid; 499 kgid_t gid; 500 u32 fh_count, id; 501 int j, dss_id; 502 503 rc = -EIO; 504 p = xdr_inline_decode(&stream, 4); 505 if (!p) 506 goto out_err_free; 507 508 // Ensure all mirrors have same stripe count. 509 if (dss_count == 0) 510 dss_count = be32_to_cpup(p); 511 else if (dss_count != be32_to_cpup(p)) 512 goto out_err_free; 513 514 if (dss_count > NFS4_FLEXFILE_LAYOUT_MAX_STRIPE_CNT || 515 dss_count == 0) 516 goto out_err_free; 517 518 if (dss_count > 1 && stripe_unit == 0) 519 goto out_err_free; 520 521 fls->mirror_array[i] = ff_layout_alloc_mirror(dss_count, gfp_flags); 522 if (fls->mirror_array[i] == NULL) { 523 rc = -ENOMEM; 524 goto out_err_free; 525 } 526 527 for (dss_id = 0; dss_id < dss_count; dss_id++) { 528 dss_info = &fls->mirror_array[i]->dss[dss_id]; 529 dss_info->mirror = fls->mirror_array[i]; 530 531 /* deviceid */ 532 rc = decode_deviceid(&stream, &dss_info->devid); 533 if (rc) 534 goto out_err_free; 535 536 /* efficiency */ 537 rc = -EIO; 538 p = xdr_inline_decode(&stream, 4); 539 if (!p) 540 goto out_err_free; 541 dss_info->efficiency = be32_to_cpup(p); 542 543 /* stateid */ 544 rc = decode_pnfs_stateid(&stream, &dss_info->stateid); 545 if (rc) 546 goto out_err_free; 547 548 /* fh */ 549 rc = -EIO; 550 p = xdr_inline_decode(&stream, 4); 551 if (!p) 552 goto out_err_free; 553 fh_count = be32_to_cpup(p); 554 if (fh_count == 0) { 555 rc = -EINVAL; 556 goto out_err_free; 557 } 558 559 dss_info->fh_versions = 560 kzalloc_objs(struct nfs_fh, fh_count, gfp_flags); 561 if (dss_info->fh_versions == NULL) { 562 rc = -ENOMEM; 563 goto out_err_free; 564 } 565 566 for (j = 0; j < fh_count; j++) { 567 rc = decode_nfs_fh(&stream, 568 &dss_info->fh_versions[j]); 569 if (rc) 570 goto out_err_free; 571 } 572 573 dss_info->fh_versions_cnt = fh_count; 574 575 /* user */ 576 rc = decode_name(&stream, &id); 577 if (rc) 578 goto out_err_free; 579 580 uid = make_kuid(&init_user_ns, id); 581 582 /* group */ 583 rc = decode_name(&stream, &id); 584 if (rc) 585 goto out_err_free; 586 587 gid = make_kgid(&init_user_ns, id); 588 589 if (gfp_flags & __GFP_FS) 590 kcred = prepare_kernel_cred(&init_task); 591 else { 592 unsigned int nofs_flags = memalloc_nofs_save(); 593 594 kcred = prepare_kernel_cred(&init_task); 595 memalloc_nofs_restore(nofs_flags); 596 } 597 rc = -ENOMEM; 598 if (!kcred) 599 goto out_err_free; 600 kcred->fsuid = uid; 601 kcred->fsgid = gid; 602 cred = RCU_INITIALIZER(kcred); 603 604 if (lgr->range.iomode == IOMODE_READ) 605 rcu_assign_pointer(dss_info->ro_cred, cred); 606 else 607 rcu_assign_pointer(dss_info->rw_cred, cred); 608 } 609 610 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); 611 if (mirror != fls->mirror_array[i]) { 612 for (dss_id = 0; dss_id < dss_count; dss_id++) { 613 dss_info = &fls->mirror_array[i]->dss[dss_id]; 614 /* swap cred ptrs so free_mirror will clean up old */ 615 if (lgr->range.iomode == IOMODE_READ) { 616 cred = xchg(&mirror->dss[dss_id].ro_cred, 617 dss_info->ro_cred); 618 rcu_assign_pointer(dss_info->ro_cred, cred); 619 } else { 620 cred = xchg(&mirror->dss[dss_id].rw_cred, 621 dss_info->rw_cred); 622 rcu_assign_pointer(dss_info->rw_cred, cred); 623 } 624 } 625 ff_layout_free_mirror(fls->mirror_array[i]); 626 fls->mirror_array[i] = mirror; 627 } 628 629 dprintk("%s: iomode %s uid %u gid %u\n", __func__, 630 lgr->range.iomode == IOMODE_READ ? "READ" : "RW", 631 from_kuid(&init_user_ns, uid), 632 from_kgid(&init_user_ns, gid)); 633 } 634 635 p = xdr_inline_decode(&stream, 4); 636 if (!p) 637 goto out_sort_mirrors; 638 fls->flags = be32_to_cpup(p); 639 if (fls->flags & FF_FLAGS_NO_IO_THRU_MDS) 640 set_bit(NFS4_FF_HDR_NO_IO_THRU_MDS, 641 &FF_LAYOUT_FROM_HDR(lh)->flags); 642 643 p = xdr_inline_decode(&stream, 4); 644 if (!p) 645 goto out_sort_mirrors; 646 for (i=0; i < fls->mirror_array_cnt; i++) 647 fls->mirror_array[i]->report_interval = be32_to_cpup(p); 648 649 out_sort_mirrors: 650 ff_layout_sort_mirrors(fls); 651 ret = &fls->generic_hdr; 652 dprintk("<-- %s (success)\n", __func__); 653 out_free_page: 654 folio_put(scratch); 655 return ret; 656 out_err_free: 657 _ff_layout_free_lseg(fls); 658 ret = ERR_PTR(rc); 659 dprintk("<-- %s (%d)\n", __func__, rc); 660 goto out_free_page; 661 } 662 663 static void 664 ff_layout_free_lseg(struct pnfs_layout_segment *lseg) 665 { 666 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 667 668 dprintk("--> %s\n", __func__); 669 670 if (lseg->pls_range.iomode == IOMODE_RW) { 671 struct nfs4_flexfile_layout *ffl; 672 struct inode *inode; 673 674 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); 675 inode = ffl->generic_hdr.plh_inode; 676 spin_lock(&inode->i_lock); 677 pnfs_generic_ds_cinfo_release_lseg(&ffl->commit_info, lseg); 678 spin_unlock(&inode->i_lock); 679 } 680 _ff_layout_free_lseg(fls); 681 } 682 683 static u32 calc_commit_idx(struct pnfs_layout_segment *lseg, 684 u32 mirror_idx, u32 dss_id) 685 { 686 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 687 688 return (mirror_idx * flseg->mirror_array[0]->dss_count) + dss_id; 689 } 690 691 static u32 calc_mirror_idx_from_commit(struct pnfs_layout_segment *lseg, 692 u32 commit_index) 693 { 694 return commit_index / FF_LAYOUT_LSEG(lseg)->mirror_array[0]->dss_count; 695 } 696 697 static u32 calc_dss_id_from_commit(struct pnfs_layout_segment *lseg, 698 u32 commit_index) 699 { 700 return commit_index % FF_LAYOUT_LSEG(lseg)->mirror_array[0]->dss_count; 701 } 702 703 static void 704 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) 705 { 706 /* first IO request? */ 707 if (atomic_inc_return(&timer->n_ops) == 1) { 708 timer->start_time = now; 709 } 710 } 711 712 static ktime_t 713 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) 714 { 715 ktime_t start; 716 717 if (atomic_dec_return(&timer->n_ops) < 0) 718 WARN_ON_ONCE(1); 719 720 start = timer->start_time; 721 timer->start_time = now; 722 return ktime_sub(now, start); 723 } 724 725 static bool 726 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, 727 u32 dss_id, 728 struct nfs4_ff_layoutstat *layoutstat, 729 ktime_t now) 730 { 731 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; 732 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout); 733 734 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); 735 if (!mirror->dss[dss_id].start_time) 736 mirror->dss[dss_id].start_time = now; 737 if (mirror->report_interval != 0) 738 report_interval = (s64)mirror->report_interval * 1000LL; 739 else if (layoutstats_timer != 0) 740 report_interval = (s64)layoutstats_timer * 1000LL; 741 if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >= 742 report_interval) { 743 ffl->last_report_time = now; 744 return true; 745 } 746 747 return false; 748 } 749 750 static void 751 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, 752 __u64 requested) 753 { 754 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; 755 756 iostat->ops_requested++; 757 iostat->bytes_requested += requested; 758 } 759 760 static void 761 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, 762 __u64 requested, 763 __u64 completed, 764 ktime_t time_completed, 765 ktime_t time_started) 766 { 767 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; 768 ktime_t completion_time = ktime_sub(time_completed, time_started); 769 ktime_t timer; 770 771 iostat->ops_completed++; 772 iostat->bytes_completed += completed; 773 iostat->bytes_not_delivered += requested - completed; 774 775 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); 776 iostat->total_busy_time = 777 ktime_add(iostat->total_busy_time, timer); 778 iostat->aggregate_completion_time = 779 ktime_add(iostat->aggregate_completion_time, 780 completion_time); 781 } 782 783 static void 784 nfs4_ff_layout_stat_io_start_read(struct inode *inode, 785 struct nfs4_ff_layout_mirror *mirror, 786 u32 dss_id, 787 __u64 requested, ktime_t now) 788 { 789 bool report; 790 791 spin_lock(&mirror->lock); 792 report = nfs4_ff_layoutstat_start_io( 793 mirror, dss_id, &mirror->dss[dss_id].read_stat, now); 794 nfs4_ff_layout_stat_io_update_requested( 795 &mirror->dss[dss_id].read_stat, requested); 796 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 797 spin_unlock(&mirror->lock); 798 799 if (report) 800 pnfs_report_layoutstat(inode, nfs_io_gfp_mask()); 801 } 802 803 static void 804 nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, 805 struct nfs4_ff_layout_mirror *mirror, 806 u32 dss_id, 807 __u64 requested, 808 __u64 completed) 809 { 810 spin_lock(&mirror->lock); 811 nfs4_ff_layout_stat_io_update_completed(&mirror->dss[dss_id].read_stat, 812 requested, completed, 813 ktime_get(), task->tk_start); 814 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 815 spin_unlock(&mirror->lock); 816 } 817 818 static void 819 nfs4_ff_layout_stat_io_start_write(struct inode *inode, 820 struct nfs4_ff_layout_mirror *mirror, 821 u32 dss_id, 822 __u64 requested, ktime_t now) 823 { 824 bool report; 825 826 spin_lock(&mirror->lock); 827 report = nfs4_ff_layoutstat_start_io( 828 mirror, 829 dss_id, 830 &mirror->dss[dss_id].write_stat, 831 now); 832 nfs4_ff_layout_stat_io_update_requested( 833 &mirror->dss[dss_id].write_stat, 834 requested); 835 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 836 spin_unlock(&mirror->lock); 837 838 if (report) 839 pnfs_report_layoutstat(inode, nfs_io_gfp_mask()); 840 } 841 842 static void 843 nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, 844 struct nfs4_ff_layout_mirror *mirror, 845 u32 dss_id, 846 __u64 requested, 847 __u64 completed, 848 enum nfs3_stable_how committed) 849 { 850 if (committed == NFS_UNSTABLE) 851 requested = completed = 0; 852 853 spin_lock(&mirror->lock); 854 nfs4_ff_layout_stat_io_update_completed(&mirror->dss[dss_id].write_stat, 855 requested, completed, ktime_get(), task->tk_start); 856 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags); 857 spin_unlock(&mirror->lock); 858 } 859 860 static void 861 ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, u32 idx, u32 dss_id) 862 { 863 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx, dss_id); 864 865 if (devid) 866 nfs4_mark_deviceid_unavailable(devid); 867 } 868 869 static void 870 ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, u32 idx, u32 dss_id) 871 { 872 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx, dss_id); 873 874 if (devid) 875 nfs4_mark_deviceid_available(devid); 876 } 877 878 static struct nfs4_pnfs_ds * 879 ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg, 880 u32 start_idx, u32 *best_idx, 881 u32 offset, u32 *dss_id, 882 bool check_device) 883 { 884 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); 885 struct nfs4_ff_layout_mirror *mirror; 886 struct nfs4_pnfs_ds *ds = ERR_PTR(-EAGAIN); 887 u32 idx; 888 889 /* mirrors are initially sorted by efficiency */ 890 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) { 891 mirror = FF_LAYOUT_COMP(lseg, idx); 892 *dss_id = nfs4_ff_layout_calc_dss_id( 893 fls->stripe_unit, 894 fls->mirror_array[idx]->dss_count, 895 offset); 896 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, *dss_id, false); 897 if (IS_ERR(ds)) 898 continue; 899 900 if (check_device && 901 nfs4_test_deviceid_unavailable(&mirror->dss[*dss_id].mirror_ds->id_node)) { 902 // reinitialize the error state in case if this is the last iteration 903 ds = ERR_PTR(-EINVAL); 904 continue; 905 } 906 907 *best_idx = idx; 908 break; 909 } 910 911 return ds; 912 } 913 914 static struct nfs4_pnfs_ds * 915 ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg, 916 u32 start_idx, u32 *best_idx, 917 u32 offset, u32 *dss_id) 918 { 919 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, 920 offset, dss_id, false); 921 } 922 923 static struct nfs4_pnfs_ds * 924 ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg, 925 u32 start_idx, u32 *best_idx, 926 u32 offset, u32 *dss_id) 927 { 928 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, 929 offset, dss_id, true); 930 } 931 932 static struct nfs4_pnfs_ds * 933 ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg, 934 u32 start_idx, u32 *best_idx, 935 u32 offset, u32 *dss_id) 936 { 937 struct nfs4_pnfs_ds *ds; 938 939 ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx, 940 offset, dss_id); 941 if (!IS_ERR(ds)) 942 return ds; 943 return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx, 944 offset, dss_id); 945 } 946 947 static struct nfs4_pnfs_ds * 948 ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio, 949 u32 *best_idx, 950 u32 offset, 951 u32 *dss_id) 952 { 953 struct pnfs_layout_segment *lseg = pgio->pg_lseg; 954 struct nfs4_pnfs_ds *ds; 955 956 ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx, 957 best_idx, offset, dss_id); 958 if (!IS_ERR(ds) || !pgio->pg_mirror_idx) 959 return ds; 960 return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx, 961 offset, dss_id); 962 } 963 964 static void 965 ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio, 966 struct nfs_page *req, 967 bool strict_iomode) 968 { 969 pnfs_put_lseg(pgio->pg_lseg); 970 pgio->pg_lseg = 971 pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), 972 req_offset(req), req->wb_bytes, IOMODE_READ, 973 strict_iomode, nfs_io_gfp_mask()); 974 if (IS_ERR(pgio->pg_lseg)) { 975 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 976 pgio->pg_lseg = NULL; 977 } 978 } 979 980 static bool 981 ff_layout_lseg_is_striped(const struct nfs4_ff_layout_segment *fls) 982 { 983 return fls->mirror_array[0]->dss_count > 1; 984 } 985 986 /* 987 * ff_layout_pg_test(). Called by nfs_can_coalesce_requests() 988 * 989 * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number 990 * of bytes (maximum @req->wb_bytes) that can be coalesced. 991 */ 992 static size_t 993 ff_layout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, 994 struct nfs_page *req) 995 { 996 unsigned int size; 997 u64 p_stripe, r_stripe; 998 u32 stripe_offset; 999 u64 segment_offset = pgio->pg_lseg->pls_range.offset; 1000 u32 stripe_unit = FF_LAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; 1001 1002 /* calls nfs_generic_pg_test */ 1003 size = pnfs_generic_pg_test(pgio, prev, req); 1004 if (!size) 1005 return 0; 1006 else if (!ff_layout_lseg_is_striped(FF_LAYOUT_LSEG(pgio->pg_lseg))) 1007 return size; 1008 1009 /* see if req and prev are in the same stripe */ 1010 if (prev) { 1011 p_stripe = (u64)req_offset(prev) - segment_offset; 1012 r_stripe = (u64)req_offset(req) - segment_offset; 1013 do_div(p_stripe, stripe_unit); 1014 do_div(r_stripe, stripe_unit); 1015 1016 if (p_stripe != r_stripe) 1017 return 0; 1018 } 1019 1020 /* calculate remaining bytes in the current stripe */ 1021 div_u64_rem((u64)req_offset(req) - segment_offset, 1022 stripe_unit, 1023 &stripe_offset); 1024 WARN_ON_ONCE(stripe_offset > stripe_unit); 1025 if (stripe_offset >= stripe_unit) 1026 return 0; 1027 return min(stripe_unit - (unsigned int)stripe_offset, size); 1028 } 1029 1030 static void 1031 ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, 1032 struct nfs_page *req) 1033 { 1034 struct nfs_pgio_mirror *pgm; 1035 struct nfs4_ff_layout_mirror *mirror; 1036 struct nfs4_pnfs_ds *ds; 1037 u32 ds_idx, dss_id; 1038 1039 if (NFS_SERVER(pgio->pg_inode)->flags & 1040 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)) 1041 pgio->pg_maxretrans = io_maxretrans; 1042 retry: 1043 pnfs_generic_pg_check_layout(pgio, req); 1044 /* Use full layout for now */ 1045 if (!pgio->pg_lseg) { 1046 ff_layout_pg_get_read(pgio, req, false); 1047 if (!pgio->pg_lseg) 1048 goto out_nolseg; 1049 } 1050 if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { 1051 ff_layout_pg_get_read(pgio, req, true); 1052 if (!pgio->pg_lseg) 1053 goto out_nolseg; 1054 } 1055 /* Reset wb_nio, since getting layout segment was successful */ 1056 req->wb_nio = 0; 1057 1058 ds = ff_layout_get_ds_for_read(pgio, &ds_idx, 1059 req_offset(req), &dss_id); 1060 if (IS_ERR(ds)) { 1061 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) 1062 goto out_mds; 1063 pnfs_generic_pg_cleanup(pgio); 1064 /* Sleep for 1 second before retrying */ 1065 ssleep(1); 1066 goto retry; 1067 } 1068 1069 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); 1070 pgm = &pgio->pg_mirrors[0]; 1071 pgm->pg_bsize = mirror->dss[dss_id].mirror_ds->ds_versions[0].rsize; 1072 1073 pgio->pg_mirror_idx = ds_idx; 1074 return; 1075 out_nolseg: 1076 if (pgio->pg_error < 0) { 1077 if (pgio->pg_error != -EAGAIN) 1078 return; 1079 /* Retry getting layout segment if lower layer returned -EAGAIN */ 1080 if (pgio->pg_maxretrans && req->wb_nio++ > pgio->pg_maxretrans) { 1081 if (NFS_SERVER(pgio->pg_inode)->flags & NFS_MOUNT_SOFTERR) 1082 pgio->pg_error = -ETIMEDOUT; 1083 else 1084 pgio->pg_error = -EIO; 1085 return; 1086 } 1087 pgio->pg_error = 0; 1088 /* Sleep for 1 second before retrying */ 1089 ssleep(1); 1090 goto retry; 1091 } 1092 out_mds: 1093 trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode, 1094 0, NFS4_MAX_UINT64, IOMODE_READ, 1095 NFS_I(pgio->pg_inode)->layout, 1096 pgio->pg_lseg); 1097 pgio->pg_maxretrans = 0; 1098 nfs_pageio_reset_read_mds(pgio); 1099 } 1100 1101 static void 1102 ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, 1103 struct nfs_page *req) 1104 { 1105 struct nfs4_ff_layout_mirror *mirror; 1106 struct nfs_pgio_mirror *pgm; 1107 struct nfs4_pnfs_ds *ds; 1108 u32 i, dss_id; 1109 1110 retry: 1111 pnfs_generic_pg_check_layout(pgio, req); 1112 if (!pgio->pg_lseg) { 1113 pgio->pg_lseg = 1114 pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), 1115 req_offset(req), req->wb_bytes, 1116 IOMODE_RW, false, nfs_io_gfp_mask()); 1117 if (IS_ERR(pgio->pg_lseg)) { 1118 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 1119 pgio->pg_lseg = NULL; 1120 return; 1121 } 1122 } 1123 /* If no lseg, fall back to write through mds */ 1124 if (pgio->pg_lseg == NULL) 1125 goto out_mds; 1126 1127 /* Use a direct mapping of ds_idx to pgio mirror_idx */ 1128 if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg)) 1129 goto out_eagain; 1130 1131 for (i = 0; i < pgio->pg_mirror_count; i++) { 1132 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); 1133 dss_id = nfs4_ff_layout_calc_dss_id( 1134 FF_LAYOUT_LSEG(pgio->pg_lseg)->stripe_unit, 1135 mirror->dss_count, 1136 req_offset(req)); 1137 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, 1138 dss_id, true); 1139 if (IS_ERR(ds)) { 1140 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg)) 1141 goto out_mds; 1142 pnfs_generic_pg_cleanup(pgio); 1143 /* Sleep for 1 second before retrying */ 1144 ssleep(1); 1145 goto retry; 1146 } 1147 pgm = &pgio->pg_mirrors[i]; 1148 pgm->pg_bsize = mirror->dss[dss_id].mirror_ds->ds_versions[0].wsize; 1149 } 1150 1151 if (NFS_SERVER(pgio->pg_inode)->flags & 1152 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)) 1153 pgio->pg_maxretrans = io_maxretrans; 1154 return; 1155 out_eagain: 1156 pnfs_generic_pg_cleanup(pgio); 1157 pgio->pg_error = -EAGAIN; 1158 return; 1159 out_mds: 1160 trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode, 1161 0, NFS4_MAX_UINT64, IOMODE_RW, 1162 NFS_I(pgio->pg_inode)->layout, 1163 pgio->pg_lseg); 1164 pgio->pg_maxretrans = 0; 1165 nfs_pageio_reset_write_mds(pgio); 1166 pgio->pg_error = -EAGAIN; 1167 } 1168 1169 static unsigned int 1170 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, 1171 struct nfs_page *req) 1172 { 1173 if (!pgio->pg_lseg) { 1174 pgio->pg_lseg = 1175 pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), 1176 req_offset(req), req->wb_bytes, 1177 IOMODE_RW, false, nfs_io_gfp_mask()); 1178 if (IS_ERR(pgio->pg_lseg)) { 1179 pgio->pg_error = PTR_ERR(pgio->pg_lseg); 1180 pgio->pg_lseg = NULL; 1181 goto out; 1182 } 1183 } 1184 if (pgio->pg_lseg) 1185 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); 1186 1187 trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode, 1188 0, NFS4_MAX_UINT64, IOMODE_RW, 1189 NFS_I(pgio->pg_inode)->layout, 1190 pgio->pg_lseg); 1191 if (NFS_I(pgio->pg_inode)->layout && 1192 ff_layout_hdr_no_fallback_to_mds(NFS_I(pgio->pg_inode)->layout)) { 1193 /* 1194 * FF_FLAGS_NO_IO_THRU_MDS: no current lseg but the server's 1195 * policy forbids MDS fallback. Surface -EAGAIN so writeback 1196 * retries rather than silently issuing the WRITE via MDS. 1197 */ 1198 pgio->pg_error = -EAGAIN; 1199 goto out; 1200 } 1201 /* no lseg means that pnfs is not in use, so no mirroring here */ 1202 nfs_pageio_reset_write_mds(pgio); 1203 out: 1204 return 1; 1205 } 1206 1207 static u32 1208 ff_layout_pg_set_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx) 1209 { 1210 u32 old = desc->pg_mirror_idx; 1211 1212 desc->pg_mirror_idx = idx; 1213 return old; 1214 } 1215 1216 static struct nfs_pgio_mirror * 1217 ff_layout_pg_get_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx) 1218 { 1219 return &desc->pg_mirrors[idx]; 1220 } 1221 1222 static const struct nfs_pageio_ops ff_layout_pg_read_ops = { 1223 .pg_init = ff_layout_pg_init_read, 1224 .pg_test = ff_layout_pg_test, 1225 .pg_doio = pnfs_generic_pg_readpages, 1226 .pg_cleanup = pnfs_generic_pg_cleanup, 1227 }; 1228 1229 static const struct nfs_pageio_ops ff_layout_pg_write_ops = { 1230 .pg_init = ff_layout_pg_init_write, 1231 .pg_test = ff_layout_pg_test, 1232 .pg_doio = pnfs_generic_pg_writepages, 1233 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, 1234 .pg_cleanup = pnfs_generic_pg_cleanup, 1235 .pg_get_mirror = ff_layout_pg_get_mirror_write, 1236 .pg_set_mirror = ff_layout_pg_set_mirror_write, 1237 }; 1238 1239 static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) 1240 { 1241 struct rpc_task *task = &hdr->task; 1242 1243 pnfs_layoutcommit_inode(hdr->inode, false); 1244 1245 if (retry_pnfs) { 1246 dprintk("%s Reset task %5u for i/o through pNFS " 1247 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1248 hdr->task.tk_pid, 1249 hdr->inode->i_sb->s_id, 1250 (unsigned long long)hdr->inode->i_ino, 1251 hdr->args.count, 1252 (unsigned long long)hdr->args.offset); 1253 1254 hdr->completion_ops->reschedule_io(hdr); 1255 return; 1256 } 1257 1258 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { 1259 dprintk("%s Reset task %5u for i/o through MDS " 1260 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1261 hdr->task.tk_pid, 1262 hdr->inode->i_sb->s_id, 1263 (unsigned long long)hdr->inode->i_ino, 1264 hdr->args.count, 1265 (unsigned long long)hdr->args.offset); 1266 1267 trace_pnfs_mds_fallback_write_done(hdr->inode, 1268 hdr->args.offset, hdr->args.count, 1269 IOMODE_RW, NFS_I(hdr->inode)->layout, 1270 hdr->lseg); 1271 task->tk_status = pnfs_write_done_resend_to_mds(hdr); 1272 } 1273 } 1274 1275 static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr) 1276 { 1277 u32 idx = hdr->pgio_mirror_idx + 1; 1278 u32 new_idx = 0; 1279 u32 dss_id = 0; 1280 struct nfs4_pnfs_ds *ds; 1281 1282 ds = ff_layout_choose_any_ds_for_read(hdr->lseg, idx, &new_idx, 1283 hdr->args.offset, &dss_id); 1284 if (IS_ERR(ds)) 1285 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg); 1286 else 1287 ff_layout_send_layouterror(hdr->lseg); 1288 pnfs_read_resend_pnfs(hdr, new_idx); 1289 } 1290 1291 static void ff_layout_reset_read(struct nfs_pgio_header *hdr) 1292 { 1293 struct rpc_task *task = &hdr->task; 1294 1295 pnfs_layoutcommit_inode(hdr->inode, false); 1296 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg); 1297 1298 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { 1299 dprintk("%s Reset task %5u for i/o through MDS " 1300 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, 1301 hdr->task.tk_pid, 1302 hdr->inode->i_sb->s_id, 1303 (unsigned long long)hdr->inode->i_ino, 1304 hdr->args.count, 1305 (unsigned long long)hdr->args.offset); 1306 1307 trace_pnfs_mds_fallback_read_done(hdr->inode, 1308 hdr->args.offset, hdr->args.count, 1309 IOMODE_READ, NFS_I(hdr->inode)->layout, 1310 hdr->lseg); 1311 task->tk_status = pnfs_read_done_resend_to_mds(hdr); 1312 } 1313 } 1314 1315 static int ff_layout_async_handle_error_v4(struct rpc_task *task, 1316 u32 op_status, 1317 struct nfs4_state *state, 1318 struct nfs_client *clp, 1319 struct pnfs_layout_segment *lseg, 1320 u32 idx, u32 dss_id) 1321 { 1322 struct pnfs_layout_hdr *lo = lseg->pls_layout; 1323 struct inode *inode = lo->plh_inode; 1324 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx, dss_id); 1325 struct nfs4_slot_table *tbl = nfs4_has_session(clp) ? 1326 &clp->cl_session->fc_slot_table : clp->cl_slot_tbl; 1327 1328 switch (op_status) { 1329 case NFS4_OK: 1330 case NFS4ERR_NXIO: 1331 break; 1332 case NFSERR_PERM: 1333 if (!task->tk_xprt) 1334 break; 1335 xprt_force_disconnect(task->tk_xprt); 1336 goto out_retry; 1337 case NFS4ERR_BADSESSION: 1338 case NFS4ERR_BADSLOT: 1339 case NFS4ERR_BAD_HIGH_SLOT: 1340 case NFS4ERR_DEADSESSION: 1341 case NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1342 case NFS4ERR_SEQ_FALSE_RETRY: 1343 case NFS4ERR_SEQ_MISORDERED: 1344 dprintk("%s ERROR %d, Reset session. Exchangeid " 1345 "flags 0x%x\n", __func__, task->tk_status, 1346 clp->cl_exchange_flags); 1347 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); 1348 goto out_retry; 1349 case NFS4ERR_DELAY: 1350 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1351 fallthrough; 1352 case NFS4ERR_GRACE: 1353 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); 1354 goto out_retry; 1355 case NFS4ERR_RETRY_UNCACHED_REP: 1356 goto out_retry; 1357 /* Invalidate Layout errors */ 1358 case NFS4ERR_PNFS_NO_LAYOUT: 1359 case NFS4ERR_STALE: 1360 case NFS4ERR_BADHANDLE: 1361 case NFS4ERR_ISDIR: 1362 case NFS4ERR_FHEXPIRED: 1363 case NFS4ERR_WRONG_TYPE: 1364 dprintk("%s Invalid layout error %d\n", __func__, 1365 task->tk_status); 1366 /* 1367 * Destroy layout so new i/o will get a new layout. 1368 * Layout will not be destroyed until all current lseg 1369 * references are put. Mark layout as invalid to resend failed 1370 * i/o and all i/o waiting on the slot table to the MDS until 1371 * layout is destroyed and a new valid layout is obtained. 1372 */ 1373 pnfs_destroy_layout(NFS_I(inode)); 1374 rpc_wake_up(&tbl->slot_tbl_waitq); 1375 goto reset; 1376 default: 1377 break; 1378 } 1379 1380 switch (task->tk_status) { 1381 /* RPC connection errors */ 1382 case -ENETDOWN: 1383 case -ENETUNREACH: 1384 if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags)) 1385 return -NFS4ERR_FATAL_IOERROR; 1386 fallthrough; 1387 case -ECONNREFUSED: 1388 case -EHOSTDOWN: 1389 case -EHOSTUNREACH: 1390 case -EIO: 1391 case -ETIMEDOUT: 1392 case -EPIPE: 1393 case -EPROTO: 1394 case -ENODEV: 1395 dprintk("%s DS connection error %d\n", __func__, 1396 task->tk_status); 1397 nfs4_delete_deviceid(devid->ld, devid->nfs_client, 1398 &devid->deviceid); 1399 rpc_wake_up(&tbl->slot_tbl_waitq); 1400 break; 1401 default: 1402 break; 1403 } 1404 1405 if (ff_layout_avoid_mds_available_ds(lseg)) 1406 return -NFS4ERR_RESET_TO_PNFS; 1407 reset: 1408 dprintk("%s Retry through MDS. Error %d\n", __func__, 1409 task->tk_status); 1410 return -NFS4ERR_RESET_TO_MDS; 1411 1412 out_retry: 1413 task->tk_status = 0; 1414 return -EAGAIN; 1415 } 1416 1417 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ 1418 static int ff_layout_async_handle_error_v3(struct rpc_task *task, 1419 u32 op_status, 1420 struct nfs_client *clp, 1421 struct pnfs_layout_segment *lseg, 1422 u32 idx, u32 dss_id) 1423 { 1424 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx, dss_id); 1425 1426 switch (op_status) { 1427 case NFS_OK: 1428 case NFSERR_NXIO: 1429 break; 1430 case NFSERR_PERM: 1431 if (!task->tk_xprt) 1432 break; 1433 xprt_force_disconnect(task->tk_xprt); 1434 goto out_retry; 1435 case NFSERR_ACCES: 1436 case NFSERR_BADHANDLE: 1437 case NFSERR_FBIG: 1438 case NFSERR_IO: 1439 case NFSERR_NOSPC: 1440 case NFSERR_ROFS: 1441 case NFSERR_STALE: 1442 goto out_reset_to_pnfs; 1443 case NFSERR_JUKEBOX: 1444 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1445 goto out_retry; 1446 default: 1447 break; 1448 } 1449 1450 switch (task->tk_status) { 1451 /* File access problems. Don't mark the device as unavailable */ 1452 case -EACCES: 1453 case -ESTALE: 1454 case -EISDIR: 1455 case -EBADHANDLE: 1456 case -ELOOP: 1457 case -ENOSPC: 1458 break; 1459 case -EJUKEBOX: 1460 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); 1461 goto out_retry; 1462 case -ENETDOWN: 1463 case -ENETUNREACH: 1464 if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags)) 1465 return -NFS4ERR_FATAL_IOERROR; 1466 fallthrough; 1467 default: 1468 dprintk("%s DS connection error %d\n", __func__, 1469 task->tk_status); 1470 nfs4_delete_deviceid(devid->ld, devid->nfs_client, 1471 &devid->deviceid); 1472 } 1473 out_reset_to_pnfs: 1474 /* FIXME: Need to prevent infinite looping here. */ 1475 return -NFS4ERR_RESET_TO_PNFS; 1476 out_retry: 1477 task->tk_status = 0; 1478 rpc_restart_call_prepare(task); 1479 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 1480 return -EAGAIN; 1481 } 1482 1483 static int ff_layout_async_handle_error(struct rpc_task *task, 1484 u32 op_status, 1485 struct nfs4_state *state, 1486 struct nfs_client *clp, 1487 struct pnfs_layout_segment *lseg, 1488 u32 idx, u32 dss_id) 1489 { 1490 int vers = clp->cl_nfs_mod->rpc_vers->number; 1491 1492 if (task->tk_status >= 0) { 1493 ff_layout_mark_ds_reachable(lseg, idx, dss_id); 1494 return 0; 1495 } 1496 1497 /* Handle the case of an invalid layout segment */ 1498 if (!pnfs_is_valid_lseg(lseg)) 1499 return -NFS4ERR_RESET_TO_PNFS; 1500 1501 switch (vers) { 1502 case 3: 1503 return ff_layout_async_handle_error_v3(task, op_status, clp, 1504 lseg, idx, dss_id); 1505 case 4: 1506 return ff_layout_async_handle_error_v4(task, op_status, state, 1507 clp, lseg, idx, dss_id); 1508 default: 1509 /* should never happen */ 1510 WARN_ON_ONCE(1); 1511 return 0; 1512 } 1513 } 1514 1515 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, 1516 u32 idx, u32 dss_id, u64 offset, u64 length, 1517 u32 *op_status, int opnum, int error) 1518 { 1519 struct nfs4_ff_layout_mirror *mirror; 1520 u32 status = *op_status; 1521 int err; 1522 1523 if (status == 0) { 1524 switch (error) { 1525 case -ETIMEDOUT: 1526 case -EPFNOSUPPORT: 1527 case -EPROTONOSUPPORT: 1528 case -EOPNOTSUPP: 1529 case -EINVAL: 1530 case -ECONNREFUSED: 1531 case -ECONNRESET: 1532 case -EHOSTDOWN: 1533 case -EHOSTUNREACH: 1534 case -ENETDOWN: 1535 case -ENETUNREACH: 1536 case -EADDRINUSE: 1537 case -ENOBUFS: 1538 case -EPIPE: 1539 case -EPERM: 1540 case -EPROTO: 1541 case -ENODEV: 1542 *op_status = status = NFS4ERR_NXIO; 1543 break; 1544 case -EACCES: 1545 *op_status = status = NFS4ERR_ACCESS; 1546 break; 1547 case -ECANCELED: 1548 /* 1549 * In-flight I/O we cancelled to return a recalled or 1550 * revoked layout. Report it as a failure to reach the 1551 * device (NFS4ERR_NXIO), like the transport errors 1552 * above, so the server can reconcile the affected mirror 1553 * instance. We aborted the I/O ourselves rather than 1554 * observe the device fail, so don't condemn it below. 1555 */ 1556 *op_status = status = NFS4ERR_NXIO; 1557 break; 1558 default: 1559 return; 1560 } 1561 } 1562 1563 mirror = FF_LAYOUT_COMP(lseg, idx); 1564 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), 1565 mirror, dss_id, offset, length, status, opnum, 1566 nfs_io_gfp_mask()); 1567 1568 /* 1569 * I/O we cancelled ourselves to return a recalled or revoked layout 1570 * is reported above so the server can reconcile the mirror, but we 1571 * have no evidence the device is at fault: don't mark it unreachable 1572 * or force a return. 1573 */ 1574 if (error == -ECANCELED) 1575 goto out; 1576 1577 switch (status) { 1578 case NFS4ERR_DELAY: 1579 case NFS4ERR_GRACE: 1580 case NFS4ERR_PERM: 1581 break; 1582 case NFS4ERR_NXIO: 1583 ff_layout_mark_ds_unreachable(lseg, idx, dss_id); 1584 /* 1585 * Don't return the layout if this is a read and we still 1586 * have layouts to try 1587 */ 1588 if (opnum == OP_READ) 1589 break; 1590 fallthrough; 1591 default: 1592 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, 1593 lseg); 1594 } 1595 1596 out: 1597 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); 1598 } 1599 1600 /* NFS_PROTO call done callback routines */ 1601 static int ff_layout_read_done_cb(struct rpc_task *task, 1602 struct nfs_pgio_header *hdr) 1603 { 1604 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(hdr->lseg); 1605 u32 dss_id = nfs4_ff_layout_calc_dss_id( 1606 flseg->stripe_unit, 1607 flseg->mirror_array[hdr->pgio_mirror_idx]->dss_count, 1608 hdr->args.offset); 1609 int err; 1610 1611 if (task->tk_status < 0) { 1612 ff_layout_io_track_ds_error(hdr->lseg, 1613 hdr->pgio_mirror_idx, dss_id, 1614 hdr->args.offset, hdr->args.count, 1615 &hdr->res.op_status, OP_READ, 1616 task->tk_status); 1617 trace_ff_layout_read_error(hdr, task->tk_status); 1618 } 1619 1620 err = ff_layout_async_handle_error(task, hdr->res.op_status, 1621 hdr->args.context->state, 1622 hdr->ds_clp, hdr->lseg, 1623 hdr->pgio_mirror_idx, 1624 dss_id); 1625 1626 trace_nfs4_pnfs_read(hdr, err); 1627 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1628 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1629 switch (err) { 1630 case -NFS4ERR_RESET_TO_PNFS: 1631 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1632 return task->tk_status; 1633 case -NFS4ERR_RESET_TO_MDS: 1634 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1635 return task->tk_status; 1636 case -EAGAIN: 1637 goto out_eagain; 1638 case -NFS4ERR_FATAL_IOERROR: 1639 task->tk_status = -EIO; 1640 return 0; 1641 } 1642 1643 return 0; 1644 out_eagain: 1645 rpc_restart_call_prepare(task); 1646 return -EAGAIN; 1647 } 1648 1649 static bool 1650 ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) 1651 { 1652 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); 1653 } 1654 1655 /* 1656 * We reference the rpc_cred of the first WRITE that triggers the need for 1657 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. 1658 * rfc5661 is not clear about which credential should be used. 1659 * 1660 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so 1661 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 1662 * we always send layoutcommit after DS writes. 1663 */ 1664 static void 1665 ff_layout_set_layoutcommit(struct inode *inode, 1666 struct pnfs_layout_segment *lseg, 1667 loff_t end_offset) 1668 { 1669 if (!ff_layout_need_layoutcommit(lseg)) 1670 return; 1671 1672 pnfs_set_layoutcommit(inode, lseg, end_offset); 1673 dprintk("%s inode %llu pls_end_pos %llu\n", __func__, inode->i_ino, 1674 (unsigned long long) NFS_I(inode)->layout->plh_lwb); 1675 } 1676 1677 static void ff_layout_read_record_layoutstats_start(struct rpc_task *task, 1678 struct nfs_pgio_header *hdr) 1679 { 1680 struct nfs4_ff_layout_mirror *mirror; 1681 u32 dss_id; 1682 1683 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) 1684 return; 1685 1686 mirror = FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx); 1687 dss_id = nfs4_ff_layout_calc_dss_id( 1688 FF_LAYOUT_LSEG(hdr->lseg)->stripe_unit, 1689 mirror->dss_count, 1690 hdr->args.offset); 1691 1692 nfs4_ff_layout_stat_io_start_read( 1693 hdr->inode, 1694 mirror, 1695 dss_id, 1696 hdr->args.count, 1697 task->tk_start); 1698 } 1699 1700 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task, 1701 struct nfs_pgio_header *hdr) 1702 { 1703 struct nfs4_ff_layout_mirror *mirror; 1704 u32 dss_id; 1705 1706 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) 1707 return; 1708 1709 mirror = FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx); 1710 dss_id = nfs4_ff_layout_calc_dss_id( 1711 FF_LAYOUT_LSEG(hdr->lseg)->stripe_unit, 1712 mirror->dss_count, 1713 hdr->args.offset); 1714 1715 nfs4_ff_layout_stat_io_end_read( 1716 task, 1717 mirror, 1718 dss_id, 1719 hdr->args.count, 1720 hdr->res.count); 1721 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags); 1722 } 1723 1724 static int ff_layout_read_prepare_common(struct rpc_task *task, 1725 struct nfs_pgio_header *hdr) 1726 { 1727 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { 1728 rpc_exit(task, -EIO); 1729 return -EIO; 1730 } 1731 1732 if (!pnfs_is_valid_lseg(hdr->lseg)) { 1733 rpc_exit(task, -EAGAIN); 1734 return -EAGAIN; 1735 } 1736 1737 ff_layout_read_record_layoutstats_start(task, hdr); 1738 return 0; 1739 } 1740 1741 /* 1742 * Call ops for the async read/write cases 1743 * In the case of dense layouts, the offset needs to be reset to its 1744 * original value. 1745 */ 1746 static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) 1747 { 1748 struct nfs_pgio_header *hdr = data; 1749 1750 if (ff_layout_read_prepare_common(task, hdr)) 1751 return; 1752 1753 rpc_call_start(task); 1754 } 1755 1756 static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) 1757 { 1758 struct nfs_pgio_header *hdr = data; 1759 1760 if (nfs4_setup_sequence(hdr->ds_clp, 1761 &hdr->args.seq_args, 1762 &hdr->res.seq_res, 1763 task)) 1764 return; 1765 1766 ff_layout_read_prepare_common(task, hdr); 1767 } 1768 1769 static void ff_layout_read_call_done(struct rpc_task *task, void *data) 1770 { 1771 struct nfs_pgio_header *hdr = data; 1772 1773 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && 1774 task->tk_status == 0) { 1775 nfs4_sequence_done(task, &hdr->res.seq_res); 1776 return; 1777 } 1778 1779 /* Note this may cause RPC to be resent */ 1780 hdr->mds_ops->rpc_call_done(task, hdr); 1781 } 1782 1783 static void ff_layout_read_count_stats(struct rpc_task *task, void *data) 1784 { 1785 struct nfs_pgio_header *hdr = data; 1786 1787 ff_layout_read_record_layoutstats_done(task, hdr); 1788 rpc_count_iostats_metrics(task, 1789 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); 1790 } 1791 1792 static void ff_layout_read_release(void *data) 1793 { 1794 struct nfs_pgio_header *hdr = data; 1795 1796 ff_layout_read_record_layoutstats_done(&hdr->task, hdr); 1797 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) 1798 ff_layout_resend_pnfs_read(hdr); 1799 else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags)) 1800 ff_layout_reset_read(hdr); 1801 pnfs_generic_rw_release(data); 1802 } 1803 1804 1805 static int ff_layout_write_done_cb(struct rpc_task *task, 1806 struct nfs_pgio_header *hdr) 1807 { 1808 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(hdr->lseg); 1809 u32 dss_id = nfs4_ff_layout_calc_dss_id( 1810 flseg->stripe_unit, 1811 flseg->mirror_array[hdr->pgio_mirror_idx]->dss_count, 1812 hdr->args.offset); 1813 loff_t end_offs = 0; 1814 int err; 1815 1816 if (task->tk_status < 0) { 1817 ff_layout_io_track_ds_error(hdr->lseg, 1818 hdr->pgio_mirror_idx, dss_id, 1819 hdr->args.offset, hdr->args.count, 1820 &hdr->res.op_status, OP_WRITE, 1821 task->tk_status); 1822 trace_ff_layout_write_error(hdr, task->tk_status); 1823 } 1824 1825 err = ff_layout_async_handle_error(task, hdr->res.op_status, 1826 hdr->args.context->state, 1827 hdr->ds_clp, hdr->lseg, 1828 hdr->pgio_mirror_idx, 1829 dss_id); 1830 1831 trace_nfs4_pnfs_write(hdr, err); 1832 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1833 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1834 switch (err) { 1835 case -NFS4ERR_RESET_TO_PNFS: 1836 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags); 1837 return task->tk_status; 1838 case -NFS4ERR_RESET_TO_MDS: 1839 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags); 1840 return task->tk_status; 1841 case -EAGAIN: 1842 return -EAGAIN; 1843 case -NFS4ERR_FATAL_IOERROR: 1844 task->tk_status = -EIO; 1845 return 0; 1846 } 1847 1848 if (hdr->res.verf->committed == NFS_FILE_SYNC || 1849 hdr->res.verf->committed == NFS_DATA_SYNC) 1850 end_offs = hdr->mds_offset + (loff_t)hdr->res.count; 1851 1852 /* Note: if the write is unstable, don't set end_offs until commit */ 1853 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs); 1854 1855 /* zero out fattr since we don't care DS attr at all */ 1856 hdr->fattr.valid = 0; 1857 if (task->tk_status >= 0) 1858 nfs_writeback_update_inode(hdr); 1859 1860 return 0; 1861 } 1862 1863 static int ff_layout_commit_done_cb(struct rpc_task *task, 1864 struct nfs_commit_data *data) 1865 { 1866 int err; 1867 u32 idx = calc_mirror_idx_from_commit(data->lseg, data->ds_commit_index); 1868 u32 dss_id = calc_dss_id_from_commit(data->lseg, data->ds_commit_index); 1869 1870 if (task->tk_status < 0) { 1871 ff_layout_io_track_ds_error(data->lseg, idx, dss_id, 1872 data->args.offset, data->args.count, 1873 &data->res.op_status, OP_COMMIT, 1874 task->tk_status); 1875 trace_ff_layout_commit_error(data, task->tk_status); 1876 } 1877 1878 err = ff_layout_async_handle_error(task, data->res.op_status, 1879 NULL, data->ds_clp, data->lseg, idx, 1880 dss_id); 1881 1882 trace_nfs4_pnfs_commit_ds(data, err); 1883 switch (err) { 1884 case -NFS4ERR_RESET_TO_PNFS: 1885 pnfs_generic_prepare_to_resend_writes(data); 1886 return -EAGAIN; 1887 case -NFS4ERR_RESET_TO_MDS: 1888 pnfs_generic_prepare_to_resend_writes(data); 1889 return -EAGAIN; 1890 case -EAGAIN: 1891 rpc_restart_call_prepare(task); 1892 return -EAGAIN; 1893 case -NFS4ERR_FATAL_IOERROR: 1894 task->tk_status = -EIO; 1895 return 0; 1896 } 1897 1898 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb); 1899 return 0; 1900 } 1901 1902 static void ff_layout_write_record_layoutstats_start(struct rpc_task *task, 1903 struct nfs_pgio_header *hdr) 1904 { 1905 struct nfs4_ff_layout_mirror *mirror; 1906 u32 dss_id; 1907 1908 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags)) 1909 return; 1910 1911 mirror = FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx); 1912 dss_id = nfs4_ff_layout_calc_dss_id( 1913 FF_LAYOUT_LSEG(hdr->lseg)->stripe_unit, 1914 mirror->dss_count, 1915 hdr->args.offset); 1916 1917 nfs4_ff_layout_stat_io_start_write( 1918 hdr->inode, 1919 mirror, 1920 dss_id, 1921 hdr->args.count, 1922 task->tk_start); 1923 } 1924 1925 static void ff_layout_write_record_layoutstats_done(struct rpc_task *task, 1926 struct nfs_pgio_header *hdr) 1927 { 1928 struct nfs4_ff_layout_mirror *mirror; 1929 u32 dss_id; 1930 1931 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags)) 1932 return; 1933 1934 mirror = FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx); 1935 dss_id = nfs4_ff_layout_calc_dss_id( 1936 FF_LAYOUT_LSEG(hdr->lseg)->stripe_unit, 1937 mirror->dss_count, 1938 hdr->args.offset); 1939 1940 nfs4_ff_layout_stat_io_end_write( 1941 task, 1942 mirror, 1943 dss_id, 1944 hdr->args.count, 1945 hdr->res.count, 1946 hdr->res.verf->committed); 1947 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags); 1948 } 1949 1950 static int ff_layout_write_prepare_common(struct rpc_task *task, 1951 struct nfs_pgio_header *hdr) 1952 { 1953 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { 1954 rpc_exit(task, -EIO); 1955 return -EIO; 1956 } 1957 1958 if (!pnfs_is_valid_lseg(hdr->lseg)) { 1959 rpc_exit(task, -EAGAIN); 1960 return -EAGAIN; 1961 } 1962 1963 ff_layout_write_record_layoutstats_start(task, hdr); 1964 return 0; 1965 } 1966 1967 static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) 1968 { 1969 struct nfs_pgio_header *hdr = data; 1970 1971 if (ff_layout_write_prepare_common(task, hdr)) 1972 return; 1973 1974 rpc_call_start(task); 1975 } 1976 1977 static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) 1978 { 1979 struct nfs_pgio_header *hdr = data; 1980 1981 if (nfs4_setup_sequence(hdr->ds_clp, 1982 &hdr->args.seq_args, 1983 &hdr->res.seq_res, 1984 task)) 1985 return; 1986 1987 ff_layout_write_prepare_common(task, hdr); 1988 } 1989 1990 static void ff_layout_write_call_done(struct rpc_task *task, void *data) 1991 { 1992 struct nfs_pgio_header *hdr = data; 1993 1994 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && 1995 task->tk_status == 0) { 1996 nfs4_sequence_done(task, &hdr->res.seq_res); 1997 return; 1998 } 1999 2000 /* Note this may cause RPC to be resent */ 2001 hdr->mds_ops->rpc_call_done(task, hdr); 2002 } 2003 2004 static void ff_layout_write_count_stats(struct rpc_task *task, void *data) 2005 { 2006 struct nfs_pgio_header *hdr = data; 2007 2008 ff_layout_write_record_layoutstats_done(task, hdr); 2009 rpc_count_iostats_metrics(task, 2010 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); 2011 } 2012 2013 static void ff_layout_write_release(void *data) 2014 { 2015 struct nfs_pgio_header *hdr = data; 2016 2017 ff_layout_write_record_layoutstats_done(&hdr->task, hdr); 2018 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) { 2019 ff_layout_send_layouterror(hdr->lseg); 2020 ff_layout_reset_write(hdr, true); 2021 } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags)) 2022 ff_layout_reset_write(hdr, false); 2023 pnfs_generic_rw_release(data); 2024 } 2025 2026 static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task, 2027 struct nfs_commit_data *cdata) 2028 { 2029 u32 idx, dss_id; 2030 2031 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags)) 2032 return; 2033 2034 idx = calc_mirror_idx_from_commit(cdata->lseg, cdata->ds_commit_index); 2035 dss_id = calc_dss_id_from_commit(cdata->lseg, cdata->ds_commit_index); 2036 nfs4_ff_layout_stat_io_start_write(cdata->inode, 2037 FF_LAYOUT_COMP(cdata->lseg, idx), 2038 dss_id, 2039 0, task->tk_start); 2040 } 2041 2042 static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task, 2043 struct nfs_commit_data *cdata) 2044 { 2045 struct nfs_page *req; 2046 __u64 count = 0; 2047 u32 idx, dss_id; 2048 2049 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags)) 2050 return; 2051 2052 if (task->tk_status == 0) { 2053 list_for_each_entry(req, &cdata->pages, wb_list) 2054 count += req->wb_bytes; 2055 } 2056 2057 idx = calc_mirror_idx_from_commit(cdata->lseg, cdata->ds_commit_index); 2058 dss_id = calc_dss_id_from_commit(cdata->lseg, cdata->ds_commit_index); 2059 nfs4_ff_layout_stat_io_end_write(task, 2060 FF_LAYOUT_COMP(cdata->lseg, idx), 2061 dss_id, 2062 count, count, NFS_FILE_SYNC); 2063 set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags); 2064 } 2065 2066 static int ff_layout_commit_prepare_common(struct rpc_task *task, 2067 struct nfs_commit_data *cdata) 2068 { 2069 if (!pnfs_is_valid_lseg(cdata->lseg)) { 2070 rpc_exit(task, -EAGAIN); 2071 return -EAGAIN; 2072 } 2073 2074 ff_layout_commit_record_layoutstats_start(task, cdata); 2075 return 0; 2076 } 2077 2078 static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) 2079 { 2080 if (ff_layout_commit_prepare_common(task, data)) 2081 return; 2082 2083 rpc_call_start(task); 2084 } 2085 2086 static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) 2087 { 2088 struct nfs_commit_data *wdata = data; 2089 2090 if (nfs4_setup_sequence(wdata->ds_clp, 2091 &wdata->args.seq_args, 2092 &wdata->res.seq_res, 2093 task)) 2094 return; 2095 ff_layout_commit_prepare_common(task, data); 2096 } 2097 2098 static void ff_layout_commit_done(struct rpc_task *task, void *data) 2099 { 2100 pnfs_generic_write_commit_done(task, data); 2101 } 2102 2103 static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) 2104 { 2105 struct nfs_commit_data *cdata = data; 2106 2107 ff_layout_commit_record_layoutstats_done(task, cdata); 2108 rpc_count_iostats_metrics(task, 2109 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); 2110 } 2111 2112 static void ff_layout_commit_release(void *data) 2113 { 2114 struct nfs_commit_data *cdata = data; 2115 2116 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata); 2117 pnfs_generic_commit_release(data); 2118 } 2119 2120 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { 2121 .rpc_call_prepare = ff_layout_read_prepare_v3, 2122 .rpc_call_done = ff_layout_read_call_done, 2123 .rpc_count_stats = ff_layout_read_count_stats, 2124 .rpc_release = ff_layout_read_release, 2125 }; 2126 2127 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { 2128 .rpc_call_prepare = ff_layout_read_prepare_v4, 2129 .rpc_call_done = ff_layout_read_call_done, 2130 .rpc_count_stats = ff_layout_read_count_stats, 2131 .rpc_release = ff_layout_read_release, 2132 }; 2133 2134 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { 2135 .rpc_call_prepare = ff_layout_write_prepare_v3, 2136 .rpc_call_done = ff_layout_write_call_done, 2137 .rpc_count_stats = ff_layout_write_count_stats, 2138 .rpc_release = ff_layout_write_release, 2139 }; 2140 2141 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { 2142 .rpc_call_prepare = ff_layout_write_prepare_v4, 2143 .rpc_call_done = ff_layout_write_call_done, 2144 .rpc_count_stats = ff_layout_write_count_stats, 2145 .rpc_release = ff_layout_write_release, 2146 }; 2147 2148 static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { 2149 .rpc_call_prepare = ff_layout_commit_prepare_v3, 2150 .rpc_call_done = ff_layout_commit_done, 2151 .rpc_count_stats = ff_layout_commit_count_stats, 2152 .rpc_release = ff_layout_commit_release, 2153 }; 2154 2155 static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { 2156 .rpc_call_prepare = ff_layout_commit_prepare_v4, 2157 .rpc_call_done = ff_layout_commit_done, 2158 .rpc_count_stats = ff_layout_commit_count_stats, 2159 .rpc_release = ff_layout_commit_release, 2160 }; 2161 2162 static enum pnfs_try_status 2163 ff_layout_read_pagelist(struct nfs_pgio_header *hdr) 2164 { 2165 struct pnfs_layout_segment *lseg = hdr->lseg; 2166 struct nfs4_pnfs_ds *ds; 2167 struct rpc_clnt *ds_clnt; 2168 struct nfsd_file *localio; 2169 struct nfs4_ff_layout_mirror *mirror; 2170 const struct cred *ds_cred; 2171 loff_t offset = hdr->args.offset; 2172 u32 idx = hdr->pgio_mirror_idx; 2173 int vers; 2174 struct nfs_fh *fh; 2175 u32 dss_id; 2176 bool ds_fatal_error = false; 2177 2178 dprintk("--> %s ino %llu pgbase %u req %zu@%llu\n", 2179 __func__, hdr->inode->i_ino, 2180 hdr->args.pgbase, (size_t)hdr->args.count, offset); 2181 2182 mirror = FF_LAYOUT_COMP(lseg, idx); 2183 dss_id = nfs4_ff_layout_calc_dss_id( 2184 FF_LAYOUT_LSEG(lseg)->stripe_unit, 2185 mirror->dss_count, 2186 offset); 2187 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, dss_id, false); 2188 if (IS_ERR(ds)) { 2189 ds_fatal_error = nfs_error_is_fatal(PTR_ERR(ds)); 2190 goto out_failed; 2191 } 2192 2193 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, 2194 hdr->inode, dss_id); 2195 if (IS_ERR(ds_clnt)) 2196 goto out_failed; 2197 2198 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred, dss_id); 2199 if (!ds_cred) 2200 goto out_failed; 2201 2202 vers = nfs4_ff_layout_ds_version(mirror, dss_id); 2203 2204 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, 2205 ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers); 2206 2207 hdr->pgio_done_cb = ff_layout_read_done_cb; 2208 refcount_inc(&ds->ds_clp->cl_count); 2209 hdr->ds_clp = ds->ds_clp; 2210 fh = nfs4_ff_layout_select_ds_fh(mirror, dss_id); 2211 if (fh) 2212 hdr->args.fh = fh; 2213 2214 nfs4_ff_layout_select_ds_stateid(mirror, dss_id, &hdr->args.stateid); 2215 2216 /* 2217 * Note that if we ever decide to split across DSes, 2218 * then we may need to handle dense-like offsets. 2219 */ 2220 hdr->args.offset = offset; 2221 hdr->mds_offset = offset; 2222 2223 /* Start IO accounting for local read */ 2224 localio = ff_local_open_fh(lseg, idx, dss_id, ds->ds_clp, ds_cred, fh, 2225 FMODE_READ); 2226 if (localio) { 2227 hdr->task.tk_start = ktime_get(); 2228 ff_layout_read_record_layoutstats_start(&hdr->task, hdr); 2229 } 2230 2231 /* Perform an asynchronous read to ds */ 2232 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, 2233 vers == 3 ? &ff_layout_read_call_ops_v3 : 2234 &ff_layout_read_call_ops_v4, 2235 0, RPC_TASK_SOFTCONN, localio); 2236 put_cred(ds_cred); 2237 return PNFS_ATTEMPTED; 2238 2239 out_failed: 2240 if (ff_layout_avoid_mds_available_ds(lseg) && !ds_fatal_error) 2241 return PNFS_TRY_AGAIN; 2242 if (ff_layout_no_fallback_to_mds(lseg)) { 2243 /* 2244 * FF_FLAGS_NO_IO_THRU_MDS: force fresh LAYOUTGET, 2245 * never fall through to MDS I/O. 2246 */ 2247 pnfs_error_mark_layout_for_return(hdr->inode, lseg); 2248 return PNFS_TRY_AGAIN; 2249 } 2250 trace_pnfs_mds_fallback_read_pagelist(hdr->inode, 2251 hdr->args.offset, hdr->args.count, 2252 IOMODE_READ, NFS_I(hdr->inode)->layout, lseg); 2253 return PNFS_NOT_ATTEMPTED; 2254 } 2255 2256 /* Perform async writes. */ 2257 static enum pnfs_try_status 2258 ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) 2259 { 2260 struct pnfs_layout_segment *lseg = hdr->lseg; 2261 struct nfs4_pnfs_ds *ds; 2262 struct rpc_clnt *ds_clnt; 2263 struct nfsd_file *localio; 2264 struct nfs4_ff_layout_mirror *mirror; 2265 const struct cred *ds_cred; 2266 loff_t offset = hdr->args.offset; 2267 int vers; 2268 struct nfs_fh *fh; 2269 u32 idx = hdr->pgio_mirror_idx; 2270 u32 dss_id; 2271 bool ds_fatal_error = false; 2272 2273 mirror = FF_LAYOUT_COMP(lseg, idx); 2274 dss_id = nfs4_ff_layout_calc_dss_id( 2275 FF_LAYOUT_LSEG(lseg)->stripe_unit, 2276 mirror->dss_count, 2277 offset); 2278 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, dss_id, true); 2279 if (IS_ERR(ds)) { 2280 ds_fatal_error = nfs_error_is_fatal(PTR_ERR(ds)); 2281 goto out_failed; 2282 } 2283 2284 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, 2285 hdr->inode, dss_id); 2286 if (IS_ERR(ds_clnt)) 2287 goto out_failed; 2288 2289 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred, dss_id); 2290 if (!ds_cred) 2291 goto out_failed; 2292 2293 vers = nfs4_ff_layout_ds_version(mirror, dss_id); 2294 2295 dprintk("%s ino %llu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n", 2296 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, 2297 offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), 2298 vers); 2299 2300 hdr->pgio_done_cb = ff_layout_write_done_cb; 2301 refcount_inc(&ds->ds_clp->cl_count); 2302 hdr->ds_clp = ds->ds_clp; 2303 hdr->ds_commit_idx = calc_commit_idx(lseg, idx, dss_id); 2304 fh = nfs4_ff_layout_select_ds_fh(mirror, dss_id); 2305 if (fh) 2306 hdr->args.fh = fh; 2307 2308 nfs4_ff_layout_select_ds_stateid(mirror, dss_id, &hdr->args.stateid); 2309 2310 /* 2311 * Note that if we ever decide to split across DSes, 2312 * then we may need to handle dense-like offsets. 2313 */ 2314 hdr->args.offset = offset; 2315 2316 /* Start IO accounting for local write */ 2317 localio = ff_local_open_fh(lseg, idx, dss_id, ds->ds_clp, ds_cred, fh, 2318 FMODE_READ|FMODE_WRITE); 2319 if (localio) { 2320 hdr->task.tk_start = ktime_get(); 2321 ff_layout_write_record_layoutstats_start(&hdr->task, hdr); 2322 } 2323 2324 /* Perform an asynchronous write */ 2325 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, 2326 vers == 3 ? &ff_layout_write_call_ops_v3 : 2327 &ff_layout_write_call_ops_v4, 2328 sync, RPC_TASK_SOFTCONN, localio); 2329 put_cred(ds_cred); 2330 return PNFS_ATTEMPTED; 2331 2332 out_failed: 2333 if (ff_layout_avoid_mds_available_ds(lseg) && !ds_fatal_error) 2334 return PNFS_TRY_AGAIN; 2335 if (ff_layout_no_fallback_to_mds(lseg)) { 2336 /* 2337 * FF_FLAGS_NO_IO_THRU_MDS: force fresh LAYOUTGET, 2338 * never fall through to MDS I/O. 2339 */ 2340 pnfs_error_mark_layout_for_return(hdr->inode, lseg); 2341 return PNFS_TRY_AGAIN; 2342 } 2343 trace_pnfs_mds_fallback_write_pagelist(hdr->inode, 2344 hdr->args.offset, hdr->args.count, 2345 IOMODE_RW, NFS_I(hdr->inode)->layout, lseg); 2346 return PNFS_NOT_ATTEMPTED; 2347 } 2348 2349 static struct nfs_fh * 2350 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i, u32 dss_id) 2351 { 2352 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 2353 2354 /* FIXME: Assume that there is only one NFS version available 2355 * for the DS. 2356 */ 2357 return &flseg->mirror_array[i]->dss[dss_id].fh_versions[0]; 2358 } 2359 2360 static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) 2361 { 2362 struct pnfs_layout_segment *lseg = data->lseg; 2363 struct nfs4_pnfs_ds *ds; 2364 struct rpc_clnt *ds_clnt; 2365 struct nfsd_file *localio; 2366 struct nfs4_ff_layout_mirror *mirror; 2367 const struct cred *ds_cred; 2368 u32 idx, dss_id; 2369 int vers, ret; 2370 struct nfs_fh *fh; 2371 2372 if (!lseg || !(pnfs_is_valid_lseg(lseg) || 2373 test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))) 2374 goto out_err; 2375 2376 idx = calc_mirror_idx_from_commit(lseg, data->ds_commit_index); 2377 mirror = FF_LAYOUT_COMP(lseg, idx); 2378 dss_id = calc_dss_id_from_commit(lseg, data->ds_commit_index); 2379 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, dss_id, true); 2380 if (IS_ERR(ds)) 2381 goto out_err; 2382 2383 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp, 2384 data->inode, dss_id); 2385 if (IS_ERR(ds_clnt)) 2386 goto out_err; 2387 2388 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred, dss_id); 2389 if (!ds_cred) 2390 goto out_err; 2391 2392 vers = nfs4_ff_layout_ds_version(mirror, dss_id); 2393 2394 dprintk("%s ino %llu, how %d cl_count %d vers %d\n", __func__, 2395 data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count), 2396 vers); 2397 data->commit_done_cb = ff_layout_commit_done_cb; 2398 data->cred = ds_cred; 2399 refcount_inc(&ds->ds_clp->cl_count); 2400 data->ds_clp = ds->ds_clp; 2401 fh = select_ds_fh_from_commit(lseg, idx, dss_id); 2402 if (fh) 2403 data->args.fh = fh; 2404 2405 /* Start IO accounting for local commit */ 2406 localio = ff_local_open_fh(lseg, idx, dss_id, ds->ds_clp, ds_cred, fh, 2407 FMODE_READ|FMODE_WRITE); 2408 if (localio) { 2409 data->task.tk_start = ktime_get(); 2410 ff_layout_commit_record_layoutstats_start(&data->task, data); 2411 } 2412 2413 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, 2414 vers == 3 ? &ff_layout_commit_call_ops_v3 : 2415 &ff_layout_commit_call_ops_v4, 2416 how, RPC_TASK_SOFTCONN, localio); 2417 put_cred(ds_cred); 2418 return ret; 2419 out_err: 2420 pnfs_generic_prepare_to_resend_writes(data); 2421 pnfs_generic_commit_release(data); 2422 return -EAGAIN; 2423 } 2424 2425 static int 2426 ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, 2427 int how, struct nfs_commit_info *cinfo) 2428 { 2429 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, 2430 ff_layout_initiate_commit); 2431 } 2432 2433 static bool ff_layout_match_rw(const struct rpc_task *task, 2434 const struct nfs_pgio_header *hdr, 2435 const struct pnfs_layout_segment *lseg) 2436 { 2437 return hdr->lseg == lseg; 2438 } 2439 2440 static bool ff_layout_match_commit(const struct rpc_task *task, 2441 const struct nfs_commit_data *cdata, 2442 const struct pnfs_layout_segment *lseg) 2443 { 2444 return cdata->lseg == lseg; 2445 } 2446 2447 static bool ff_layout_match_io(const struct rpc_task *task, const void *data) 2448 { 2449 const struct rpc_call_ops *ops = task->tk_ops; 2450 2451 if (ops == &ff_layout_read_call_ops_v3 || 2452 ops == &ff_layout_read_call_ops_v4 || 2453 ops == &ff_layout_write_call_ops_v3 || 2454 ops == &ff_layout_write_call_ops_v4) 2455 return ff_layout_match_rw(task, task->tk_calldata, data); 2456 if (ops == &ff_layout_commit_call_ops_v3 || 2457 ops == &ff_layout_commit_call_ops_v4) 2458 return ff_layout_match_commit(task, task->tk_calldata, data); 2459 return false; 2460 } 2461 2462 static void ff_layout_cancel_io(struct pnfs_layout_segment *lseg) 2463 { 2464 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 2465 struct nfs4_ff_layout_mirror *mirror; 2466 struct nfs4_ff_layout_ds *mirror_ds; 2467 struct nfs4_pnfs_ds *ds; 2468 struct nfs_client *ds_clp; 2469 struct rpc_clnt *clnt; 2470 u32 idx, dss_id; 2471 2472 for (idx = 0; idx < flseg->mirror_array_cnt; idx++) { 2473 mirror = flseg->mirror_array[idx]; 2474 for (dss_id = 0; dss_id < mirror->dss_count; dss_id++) { 2475 mirror_ds = mirror->dss[dss_id].mirror_ds; 2476 if (IS_ERR_OR_NULL(mirror_ds)) 2477 continue; 2478 ds = mirror->dss[dss_id].mirror_ds->ds; 2479 if (!ds) 2480 continue; 2481 ds_clp = ds->ds_clp; 2482 if (!ds_clp) 2483 continue; 2484 clnt = ds_clp->cl_rpcclient; 2485 if (!clnt) 2486 continue; 2487 if (!rpc_cancel_tasks(clnt, -ECANCELED, 2488 ff_layout_match_io, lseg)) 2489 continue; 2490 rpc_clnt_disconnect(clnt); 2491 } 2492 } 2493 } 2494 2495 static struct pnfs_ds_commit_info * 2496 ff_layout_get_ds_info(struct inode *inode) 2497 { 2498 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; 2499 2500 if (layout == NULL) 2501 return NULL; 2502 2503 return &FF_LAYOUT_FROM_HDR(layout)->commit_info; 2504 } 2505 2506 static void 2507 ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo, 2508 struct pnfs_layout_segment *lseg) 2509 { 2510 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); 2511 struct inode *inode = lseg->pls_layout->plh_inode; 2512 struct pnfs_commit_array *array, *new; 2513 u32 size = flseg->mirror_array_cnt * flseg->mirror_array[0]->dss_count; 2514 2515 new = pnfs_alloc_commit_array(size, 2516 nfs_io_gfp_mask()); 2517 if (new) { 2518 spin_lock(&inode->i_lock); 2519 array = pnfs_add_commit_array(fl_cinfo, new, lseg); 2520 spin_unlock(&inode->i_lock); 2521 if (array != new) 2522 pnfs_free_commit_array(new); 2523 } 2524 } 2525 2526 static void 2527 ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, 2528 struct inode *inode) 2529 { 2530 spin_lock(&inode->i_lock); 2531 pnfs_generic_ds_cinfo_destroy(fl_cinfo); 2532 spin_unlock(&inode->i_lock); 2533 } 2534 2535 static void 2536 ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) 2537 { 2538 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, 2539 id_node)); 2540 } 2541 2542 static int ff_layout_encode_ioerr(struct xdr_stream *xdr, 2543 const struct nfs4_layoutreturn_args *args, 2544 const struct nfs4_flexfile_layoutreturn_args *ff_args) 2545 { 2546 __be32 *start; 2547 2548 start = xdr_reserve_space(xdr, 4); 2549 if (unlikely(!start)) 2550 return -E2BIG; 2551 2552 *start = cpu_to_be32(ff_args->num_errors); 2553 /* This assume we always return _ALL_ layouts */ 2554 return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors); 2555 } 2556 2557 static void 2558 ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr, 2559 const nfs4_stateid *stateid, 2560 const struct nfs42_layoutstat_devinfo *devinfo) 2561 { 2562 __be32 *p; 2563 2564 p = xdr_reserve_space(xdr, 8 + 8); 2565 p = xdr_encode_hyper(p, devinfo->offset); 2566 p = xdr_encode_hyper(p, devinfo->length); 2567 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); 2568 p = xdr_reserve_space(xdr, 4*8); 2569 p = xdr_encode_hyper(p, devinfo->read_count); 2570 p = xdr_encode_hyper(p, devinfo->read_bytes); 2571 p = xdr_encode_hyper(p, devinfo->write_count); 2572 p = xdr_encode_hyper(p, devinfo->write_bytes); 2573 encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE); 2574 } 2575 2576 static void 2577 ff_layout_encode_ff_iostat(struct xdr_stream *xdr, 2578 const nfs4_stateid *stateid, 2579 const struct nfs42_layoutstat_devinfo *devinfo) 2580 { 2581 ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo); 2582 ff_layout_encode_ff_layoutupdate(xdr, devinfo, 2583 devinfo->ld_private.data); 2584 } 2585 2586 /* report nothing for now */ 2587 static void ff_layout_encode_iostats_array(struct xdr_stream *xdr, 2588 const struct nfs4_layoutreturn_args *args, 2589 struct nfs4_flexfile_layoutreturn_args *ff_args) 2590 { 2591 __be32 *p; 2592 int i; 2593 2594 p = xdr_reserve_space(xdr, 4); 2595 *p = cpu_to_be32(ff_args->num_dev); 2596 for (i = 0; i < ff_args->num_dev; i++) 2597 ff_layout_encode_ff_iostat(xdr, 2598 &args->layout->plh_stateid, 2599 &ff_args->devinfo[i]); 2600 } 2601 2602 static void 2603 ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo, 2604 unsigned int num_entries) 2605 { 2606 unsigned int i; 2607 2608 for (i = 0; i < num_entries; i++) { 2609 if (!devinfo[i].ld_private.ops) 2610 continue; 2611 if (!devinfo[i].ld_private.ops->free) 2612 continue; 2613 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); 2614 } 2615 } 2616 2617 static struct nfs4_deviceid_node * 2618 ff_layout_alloc_deviceid_node(struct nfs_server *server, 2619 struct pnfs_device *pdev, gfp_t gfp_flags) 2620 { 2621 struct nfs4_ff_layout_ds *dsaddr; 2622 2623 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); 2624 if (!dsaddr) 2625 return NULL; 2626 return &dsaddr->id_node; 2627 } 2628 2629 static void 2630 ff_layout_encode_layoutreturn(struct xdr_stream *xdr, 2631 const void *voidargs, 2632 const struct nfs4_xdr_opaque_data *ff_opaque) 2633 { 2634 const struct nfs4_layoutreturn_args *args = voidargs; 2635 struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data; 2636 struct xdr_buf tmp_buf = { 2637 .head = { 2638 [0] = { 2639 .iov_base = page_address(ff_args->pages[0]), 2640 }, 2641 }, 2642 .buflen = PAGE_SIZE, 2643 }; 2644 struct xdr_stream tmp_xdr; 2645 __be32 *start; 2646 2647 dprintk("%s: Begin\n", __func__); 2648 2649 xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL); 2650 2651 ff_layout_encode_ioerr(&tmp_xdr, args, ff_args); 2652 ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args); 2653 2654 start = xdr_reserve_space(xdr, 4); 2655 *start = cpu_to_be32(tmp_buf.len); 2656 xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len); 2657 2658 dprintk("%s: Return\n", __func__); 2659 } 2660 2661 static void 2662 ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args) 2663 { 2664 struct nfs4_flexfile_layoutreturn_args *ff_args; 2665 2666 if (!args->data) 2667 return; 2668 ff_args = args->data; 2669 args->data = NULL; 2670 2671 ff_layout_free_ds_ioerr(&ff_args->errors); 2672 ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev); 2673 2674 put_page(ff_args->pages[0]); 2675 kfree(ff_args); 2676 } 2677 2678 static const struct nfs4_xdr_opaque_ops layoutreturn_ops = { 2679 .encode = ff_layout_encode_layoutreturn, 2680 .free = ff_layout_free_layoutreturn, 2681 }; 2682 2683 static int 2684 ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args) 2685 { 2686 struct nfs4_flexfile_layoutreturn_args *ff_args; 2687 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout); 2688 2689 ff_args = kmalloc_obj(*ff_args, nfs_io_gfp_mask()); 2690 if (!ff_args) 2691 goto out_nomem; 2692 ff_args->pages[0] = alloc_page(nfs_io_gfp_mask()); 2693 if (!ff_args->pages[0]) 2694 goto out_nomem_free; 2695 2696 INIT_LIST_HEAD(&ff_args->errors); 2697 ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout, 2698 &args->range, &ff_args->errors, 2699 FF_LAYOUTRETURN_MAXERR); 2700 2701 spin_lock(&args->inode->i_lock); 2702 ff_args->num_dev = ff_layout_mirror_prepare_stats( 2703 &ff_layout->generic_hdr, &ff_args->devinfo[0], 2704 ARRAY_SIZE(ff_args->devinfo), NFS4_FF_OP_LAYOUTRETURN); 2705 spin_unlock(&args->inode->i_lock); 2706 2707 args->ld_private->ops = &layoutreturn_ops; 2708 args->ld_private->data = ff_args; 2709 return 0; 2710 out_nomem_free: 2711 kfree(ff_args); 2712 out_nomem: 2713 return -ENOMEM; 2714 } 2715 2716 #ifdef CONFIG_NFS_V4_2 2717 void 2718 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg) 2719 { 2720 struct pnfs_layout_hdr *lo = lseg->pls_layout; 2721 struct nfs42_layout_error *errors; 2722 LIST_HEAD(head); 2723 2724 if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR)) 2725 return; 2726 ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1); 2727 if (list_empty(&head)) 2728 return; 2729 2730 errors = kmalloc_objs(*errors, NFS42_LAYOUTERROR_MAX, nfs_io_gfp_mask()); 2731 if (errors != NULL) { 2732 const struct nfs4_ff_layout_ds_err *pos; 2733 size_t n = 0; 2734 2735 list_for_each_entry(pos, &head, list) { 2736 errors[n].offset = pos->offset; 2737 errors[n].length = pos->length; 2738 nfs4_stateid_copy(&errors[n].stateid, &pos->stateid); 2739 errors[n].errors[0].dev_id = pos->deviceid; 2740 errors[n].errors[0].status = pos->status; 2741 errors[n].errors[0].opnum = pos->opnum; 2742 n++; 2743 if (!list_is_last(&pos->list, &head) && 2744 n < NFS42_LAYOUTERROR_MAX) 2745 continue; 2746 if (nfs42_proc_layouterror(lseg, errors, n) < 0) 2747 break; 2748 n = 0; 2749 } 2750 kfree(errors); 2751 } 2752 ff_layout_free_ds_ioerr(&head); 2753 } 2754 #else 2755 void 2756 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg) 2757 { 2758 } 2759 #endif 2760 2761 static int 2762 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) 2763 { 2764 const struct sockaddr_in *sin = (struct sockaddr_in *)sap; 2765 2766 return snprintf(buf, buflen, "%pI4", &sin->sin_addr); 2767 } 2768 2769 static size_t 2770 ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, 2771 const int buflen) 2772 { 2773 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; 2774 const struct in6_addr *addr = &sin6->sin6_addr; 2775 2776 /* 2777 * RFC 4291, Section 2.2.2 2778 * 2779 * Shorthanded ANY address 2780 */ 2781 if (ipv6_addr_any(addr)) 2782 return snprintf(buf, buflen, "::"); 2783 2784 /* 2785 * RFC 4291, Section 2.2.2 2786 * 2787 * Shorthanded loopback address 2788 */ 2789 if (ipv6_addr_loopback(addr)) 2790 return snprintf(buf, buflen, "::1"); 2791 2792 /* 2793 * RFC 4291, Section 2.2.3 2794 * 2795 * Special presentation address format for mapped v4 2796 * addresses. 2797 */ 2798 if (ipv6_addr_v4mapped(addr)) 2799 return snprintf(buf, buflen, "::ffff:%pI4", 2800 &addr->s6_addr32[3]); 2801 2802 /* 2803 * RFC 4291, Section 2.2.1 2804 */ 2805 return snprintf(buf, buflen, "%pI6c", addr); 2806 } 2807 2808 /* Derived from rpc_sockaddr2uaddr */ 2809 static void 2810 ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) 2811 { 2812 struct sockaddr *sap = (struct sockaddr *)&da->da_addr; 2813 char portbuf[RPCBIND_MAXUADDRPLEN]; 2814 char addrbuf[RPCBIND_MAXUADDRLEN]; 2815 unsigned short port; 2816 int len, netid_len; 2817 __be32 *p; 2818 2819 switch (sap->sa_family) { 2820 case AF_INET: 2821 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) 2822 return; 2823 port = ntohs(((struct sockaddr_in *)sap)->sin_port); 2824 break; 2825 case AF_INET6: 2826 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) 2827 return; 2828 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); 2829 break; 2830 default: 2831 WARN_ON_ONCE(1); 2832 return; 2833 } 2834 2835 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); 2836 len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); 2837 2838 netid_len = strlen(da->da_netid); 2839 p = xdr_reserve_space(xdr, 4 + netid_len); 2840 xdr_encode_opaque(p, da->da_netid, netid_len); 2841 2842 p = xdr_reserve_space(xdr, 4 + len); 2843 xdr_encode_opaque(p, addrbuf, len); 2844 } 2845 2846 static void 2847 ff_layout_encode_nfstime(struct xdr_stream *xdr, 2848 ktime_t t) 2849 { 2850 struct timespec64 ts; 2851 __be32 *p; 2852 2853 p = xdr_reserve_space(xdr, 12); 2854 ts = ktime_to_timespec64(t); 2855 p = xdr_encode_hyper(p, ts.tv_sec); 2856 *p++ = cpu_to_be32(ts.tv_nsec); 2857 } 2858 2859 static void 2860 ff_layout_encode_io_latency(struct xdr_stream *xdr, 2861 struct nfs4_ff_io_stat *stat) 2862 { 2863 __be32 *p; 2864 2865 p = xdr_reserve_space(xdr, 5 * 8); 2866 p = xdr_encode_hyper(p, stat->ops_requested); 2867 p = xdr_encode_hyper(p, stat->bytes_requested); 2868 p = xdr_encode_hyper(p, stat->ops_completed); 2869 p = xdr_encode_hyper(p, stat->bytes_completed); 2870 p = xdr_encode_hyper(p, stat->bytes_not_delivered); 2871 ff_layout_encode_nfstime(xdr, stat->total_busy_time); 2872 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); 2873 } 2874 2875 static void 2876 ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr, 2877 const struct nfs42_layoutstat_devinfo *devinfo, 2878 struct nfs4_ff_layout_ds_stripe *dss_info) 2879 { 2880 struct nfs4_pnfs_ds_addr *da; 2881 struct nfs4_pnfs_ds *ds = dss_info->mirror_ds->ds; 2882 struct nfs_fh *fh = &dss_info->fh_versions[0]; 2883 __be32 *p; 2884 2885 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); 2886 dprintk("%s: DS %s: encoding address %s\n", 2887 __func__, ds->ds_remotestr, da->da_remotestr); 2888 /* netaddr4 */ 2889 ff_layout_encode_netaddr(xdr, da); 2890 /* nfs_fh4 */ 2891 p = xdr_reserve_space(xdr, 4 + fh->size); 2892 xdr_encode_opaque(p, fh->data, fh->size); 2893 /* ff_io_latency4 read */ 2894 spin_lock(&dss_info->mirror->lock); 2895 ff_layout_encode_io_latency(xdr, 2896 &dss_info->read_stat.io_stat); 2897 /* ff_io_latency4 write */ 2898 ff_layout_encode_io_latency(xdr, 2899 &dss_info->write_stat.io_stat); 2900 spin_unlock(&dss_info->mirror->lock); 2901 /* nfstime4 */ 2902 ff_layout_encode_nfstime(xdr, 2903 ktime_sub(ktime_get(), 2904 dss_info->start_time)); 2905 /* bool */ 2906 p = xdr_reserve_space(xdr, 4); 2907 *p = cpu_to_be32(false); 2908 } 2909 2910 static void 2911 ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args, 2912 const struct nfs4_xdr_opaque_data *opaque) 2913 { 2914 struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque, 2915 struct nfs42_layoutstat_devinfo, ld_private); 2916 __be32 *start; 2917 2918 /* layoutupdate length */ 2919 start = xdr_reserve_space(xdr, 4); 2920 ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data); 2921 2922 *start = cpu_to_be32((xdr->p - start - 1) * 4); 2923 } 2924 2925 static void 2926 ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque) 2927 { 2928 struct nfs4_ff_layout_ds_stripe *dss_info = opaque->data; 2929 struct nfs4_ff_layout_mirror *mirror = dss_info->mirror; 2930 2931 ff_layout_put_mirror(mirror); 2932 } 2933 2934 static const struct nfs4_xdr_opaque_ops layoutstat_ops = { 2935 .encode = ff_layout_encode_layoutstats, 2936 .free = ff_layout_free_layoutstats, 2937 }; 2938 2939 static int 2940 ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, 2941 struct nfs42_layoutstat_devinfo *devinfo, 2942 int dev_limit, enum nfs4_ff_op_type type) 2943 { 2944 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); 2945 struct nfs4_ff_layout_mirror *mirror; 2946 struct nfs4_ff_layout_ds_stripe *dss_info; 2947 struct nfs4_deviceid_node *dev; 2948 int i = 0, dss_id; 2949 2950 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { 2951 for (dss_id = 0; dss_id < mirror->dss_count; ++dss_id) { 2952 dss_info = &mirror->dss[dss_id]; 2953 if (i >= dev_limit) 2954 break; 2955 if (IS_ERR_OR_NULL(dss_info->mirror_ds)) 2956 continue; 2957 if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, 2958 &mirror->flags) && 2959 type != NFS4_FF_OP_LAYOUTRETURN) 2960 continue; 2961 /* mirror refcount put in cleanup_layoutstats */ 2962 if (!refcount_inc_not_zero(&mirror->ref)) 2963 continue; 2964 dev = &dss_info->mirror_ds->id_node; 2965 memcpy(&devinfo->dev_id, 2966 &dev->deviceid, 2967 NFS4_DEVICEID4_SIZE); 2968 devinfo->offset = 0; 2969 devinfo->length = NFS4_MAX_UINT64; 2970 spin_lock(&mirror->lock); 2971 devinfo->read_count = 2972 dss_info->read_stat.io_stat.ops_completed; 2973 devinfo->read_bytes = 2974 dss_info->read_stat.io_stat.bytes_completed; 2975 devinfo->write_count = 2976 dss_info->write_stat.io_stat.ops_completed; 2977 devinfo->write_bytes = 2978 dss_info->write_stat.io_stat.bytes_completed; 2979 spin_unlock(&mirror->lock); 2980 devinfo->layout_type = LAYOUT_FLEX_FILES; 2981 devinfo->ld_private.ops = &layoutstat_ops; 2982 devinfo->ld_private.data = &mirror->dss[dss_id]; 2983 2984 devinfo++; 2985 i++; 2986 } 2987 } 2988 return i; 2989 } 2990 2991 static int ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) 2992 { 2993 struct pnfs_layout_hdr *lo; 2994 struct nfs4_flexfile_layout *ff_layout; 2995 const int dev_count = PNFS_LAYOUTSTATS_MAXDEV; 2996 2997 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ 2998 args->devinfo = kmalloc_objs(*args->devinfo, dev_count, 2999 nfs_io_gfp_mask()); 3000 if (!args->devinfo) 3001 return -ENOMEM; 3002 3003 spin_lock(&args->inode->i_lock); 3004 lo = NFS_I(args->inode)->layout; 3005 if (lo && pnfs_layout_is_valid(lo)) { 3006 ff_layout = FF_LAYOUT_FROM_HDR(lo); 3007 args->num_dev = ff_layout_mirror_prepare_stats( 3008 &ff_layout->generic_hdr, &args->devinfo[0], dev_count, 3009 NFS4_FF_OP_LAYOUTSTATS); 3010 } else 3011 args->num_dev = 0; 3012 spin_unlock(&args->inode->i_lock); 3013 if (!args->num_dev) { 3014 kfree(args->devinfo); 3015 args->devinfo = NULL; 3016 return -ENOENT; 3017 } 3018 3019 return 0; 3020 } 3021 3022 static int 3023 ff_layout_set_layoutdriver(struct nfs_server *server, 3024 const struct nfs_fh *dummy) 3025 { 3026 #if IS_ENABLED(CONFIG_NFS_V4_2) 3027 server->caps |= NFS_CAP_LAYOUTSTATS | NFS_CAP_REBOOT_LAYOUTRETURN; 3028 #endif 3029 return 0; 3030 } 3031 3032 static const struct pnfs_commit_ops ff_layout_commit_ops = { 3033 .setup_ds_info = ff_layout_setup_ds_info, 3034 .release_ds_info = ff_layout_release_ds_info, 3035 .mark_request_commit = pnfs_layout_mark_request_commit, 3036 .clear_request_commit = pnfs_generic_clear_request_commit, 3037 .scan_commit_lists = pnfs_generic_scan_commit_lists, 3038 .recover_commit_reqs = pnfs_generic_recover_commit_reqs, 3039 .commit_pagelist = ff_layout_commit_pagelist, 3040 }; 3041 3042 static struct pnfs_layoutdriver_type flexfilelayout_type = { 3043 .id = LAYOUT_FLEX_FILES, 3044 .name = "LAYOUT_FLEX_FILES", 3045 .owner = THIS_MODULE, 3046 .flags = PNFS_LAYOUTGET_ON_OPEN, 3047 .max_layoutget_response = 4096, /* 1 page or so... */ 3048 .set_layoutdriver = ff_layout_set_layoutdriver, 3049 .alloc_layout_hdr = ff_layout_alloc_layout_hdr, 3050 .free_layout_hdr = ff_layout_free_layout_hdr, 3051 .alloc_lseg = ff_layout_alloc_lseg, 3052 .free_lseg = ff_layout_free_lseg, 3053 .add_lseg = ff_layout_add_lseg, 3054 .pg_read_ops = &ff_layout_pg_read_ops, 3055 .pg_write_ops = &ff_layout_pg_write_ops, 3056 .get_ds_info = ff_layout_get_ds_info, 3057 .free_deviceid_node = ff_layout_free_deviceid_node, 3058 .read_pagelist = ff_layout_read_pagelist, 3059 .write_pagelist = ff_layout_write_pagelist, 3060 .alloc_deviceid_node = ff_layout_alloc_deviceid_node, 3061 .prepare_layoutreturn = ff_layout_prepare_layoutreturn, 3062 .sync = pnfs_nfs_generic_sync, 3063 .prepare_layoutstats = ff_layout_prepare_layoutstats, 3064 .cancel_io = ff_layout_cancel_io, 3065 }; 3066 3067 static int __init nfs4flexfilelayout_init(void) 3068 { 3069 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", 3070 __func__); 3071 return pnfs_register_layoutdriver(&flexfilelayout_type); 3072 } 3073 3074 static void __exit nfs4flexfilelayout_exit(void) 3075 { 3076 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", 3077 __func__); 3078 pnfs_unregister_layoutdriver(&flexfilelayout_type); 3079 } 3080 3081 MODULE_ALIAS("nfs-layouttype4-4"); 3082 3083 MODULE_LICENSE("GPL"); 3084 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); 3085 3086 module_init(nfs4flexfilelayout_init); 3087 module_exit(nfs4flexfilelayout_exit); 3088 3089 module_param(io_maxretrans, ushort, 0644); 3090 MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client " 3091 "retries an I/O request before returning an error. "); 3092