1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2002 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_trans.h" 15 #include "xfs_trans_priv.h" 16 #include "xfs_quota.h" 17 #include "xfs_qm.h" 18 #include "xfs_trace.h" 19 20 STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *); 21 22 /* 23 * Add the locked dquot to the transaction. 24 * The dquot must be locked, and it cannot be associated with any 25 * transaction. 26 */ 27 void 28 xfs_trans_dqjoin( 29 struct xfs_trans *tp, 30 struct xfs_dquot *dqp) 31 { 32 ASSERT(XFS_DQ_IS_LOCKED(dqp)); 33 ASSERT(dqp->q_logitem.qli_dquot == dqp); 34 35 /* 36 * Get a log_item_desc to point at the new item. 37 */ 38 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item); 39 } 40 41 /* 42 * This is called to mark the dquot as needing 43 * to be logged when the transaction is committed. The dquot must 44 * already be associated with the given transaction. 45 * Note that it marks the entire transaction as dirty. In the ordinary 46 * case, this gets called via xfs_trans_commit, after the transaction 47 * is already dirty. However, there's nothing stop this from getting 48 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY 49 * flag. 50 */ 51 void 52 xfs_trans_log_dquot( 53 struct xfs_trans *tp, 54 struct xfs_dquot *dqp) 55 { 56 ASSERT(XFS_DQ_IS_LOCKED(dqp)); 57 58 /* Upgrade the dquot to bigtime format if possible. */ 59 if (dqp->q_id != 0 && 60 xfs_sb_version_hasbigtime(&tp->t_mountp->m_sb) && 61 !(dqp->q_type & XFS_DQTYPE_BIGTIME)) 62 dqp->q_type |= XFS_DQTYPE_BIGTIME; 63 64 tp->t_flags |= XFS_TRANS_DIRTY; 65 set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags); 66 } 67 68 /* 69 * Carry forward whatever is left of the quota blk reservation to 70 * the spanky new transaction 71 */ 72 void 73 xfs_trans_dup_dqinfo( 74 struct xfs_trans *otp, 75 struct xfs_trans *ntp) 76 { 77 struct xfs_dqtrx *oq, *nq; 78 int i, j; 79 struct xfs_dqtrx *oqa, *nqa; 80 uint64_t blk_res_used; 81 82 if (!otp->t_dqinfo) 83 return; 84 85 xfs_trans_alloc_dqinfo(ntp); 86 87 /* 88 * Because the quota blk reservation is carried forward, 89 * it is also necessary to carry forward the DQ_DIRTY flag. 90 */ 91 if (otp->t_flags & XFS_TRANS_DQ_DIRTY) 92 ntp->t_flags |= XFS_TRANS_DQ_DIRTY; 93 94 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) { 95 oqa = otp->t_dqinfo->dqs[j]; 96 nqa = ntp->t_dqinfo->dqs[j]; 97 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) { 98 blk_res_used = 0; 99 100 if (oqa[i].qt_dquot == NULL) 101 break; 102 oq = &oqa[i]; 103 nq = &nqa[i]; 104 105 if (oq->qt_blk_res && oq->qt_bcount_delta > 0) 106 blk_res_used = oq->qt_bcount_delta; 107 108 nq->qt_dquot = oq->qt_dquot; 109 nq->qt_bcount_delta = nq->qt_icount_delta = 0; 110 nq->qt_rtbcount_delta = 0; 111 112 /* 113 * Transfer whatever is left of the reservations. 114 */ 115 nq->qt_blk_res = oq->qt_blk_res - blk_res_used; 116 oq->qt_blk_res = blk_res_used; 117 118 nq->qt_rtblk_res = oq->qt_rtblk_res - 119 oq->qt_rtblk_res_used; 120 oq->qt_rtblk_res = oq->qt_rtblk_res_used; 121 122 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used; 123 oq->qt_ino_res = oq->qt_ino_res_used; 124 125 } 126 } 127 } 128 129 /* 130 * Wrap around mod_dquot to account for both user and group quotas. 131 */ 132 void 133 xfs_trans_mod_dquot_byino( 134 xfs_trans_t *tp, 135 xfs_inode_t *ip, 136 uint field, 137 int64_t delta) 138 { 139 xfs_mount_t *mp = tp->t_mountp; 140 141 if (!XFS_IS_QUOTA_RUNNING(mp) || 142 !XFS_IS_QUOTA_ON(mp) || 143 xfs_is_quota_inode(&mp->m_sb, ip->i_ino)) 144 return; 145 146 if (tp->t_dqinfo == NULL) 147 xfs_trans_alloc_dqinfo(tp); 148 149 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot) 150 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta); 151 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot) 152 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta); 153 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot) 154 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta); 155 } 156 157 STATIC struct xfs_dqtrx * 158 xfs_trans_get_dqtrx( 159 struct xfs_trans *tp, 160 struct xfs_dquot *dqp) 161 { 162 int i; 163 struct xfs_dqtrx *qa; 164 165 switch (xfs_dquot_type(dqp)) { 166 case XFS_DQTYPE_USER: 167 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR]; 168 break; 169 case XFS_DQTYPE_GROUP: 170 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP]; 171 break; 172 case XFS_DQTYPE_PROJ: 173 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ]; 174 break; 175 default: 176 return NULL; 177 } 178 179 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) { 180 if (qa[i].qt_dquot == NULL || 181 qa[i].qt_dquot == dqp) 182 return &qa[i]; 183 } 184 185 return NULL; 186 } 187 188 /* 189 * Make the changes in the transaction structure. 190 * The moral equivalent to xfs_trans_mod_sb(). 191 * We don't touch any fields in the dquot, so we don't care 192 * if it's locked or not (most of the time it won't be). 193 */ 194 void 195 xfs_trans_mod_dquot( 196 struct xfs_trans *tp, 197 struct xfs_dquot *dqp, 198 uint field, 199 int64_t delta) 200 { 201 struct xfs_dqtrx *qtrx; 202 203 ASSERT(tp); 204 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp)); 205 qtrx = NULL; 206 207 if (tp->t_dqinfo == NULL) 208 xfs_trans_alloc_dqinfo(tp); 209 /* 210 * Find either the first free slot or the slot that belongs 211 * to this dquot. 212 */ 213 qtrx = xfs_trans_get_dqtrx(tp, dqp); 214 ASSERT(qtrx); 215 if (qtrx->qt_dquot == NULL) 216 qtrx->qt_dquot = dqp; 217 218 if (delta) { 219 trace_xfs_trans_mod_dquot_before(qtrx); 220 trace_xfs_trans_mod_dquot(tp, dqp, field, delta); 221 } 222 223 switch (field) { 224 /* regular disk blk reservation */ 225 case XFS_TRANS_DQ_RES_BLKS: 226 qtrx->qt_blk_res += delta; 227 break; 228 229 /* inode reservation */ 230 case XFS_TRANS_DQ_RES_INOS: 231 qtrx->qt_ino_res += delta; 232 break; 233 234 /* disk blocks used. */ 235 case XFS_TRANS_DQ_BCOUNT: 236 qtrx->qt_bcount_delta += delta; 237 break; 238 239 case XFS_TRANS_DQ_DELBCOUNT: 240 qtrx->qt_delbcnt_delta += delta; 241 break; 242 243 /* Inode Count */ 244 case XFS_TRANS_DQ_ICOUNT: 245 if (qtrx->qt_ino_res && delta > 0) { 246 qtrx->qt_ino_res_used += delta; 247 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used); 248 } 249 qtrx->qt_icount_delta += delta; 250 break; 251 252 /* rtblk reservation */ 253 case XFS_TRANS_DQ_RES_RTBLKS: 254 qtrx->qt_rtblk_res += delta; 255 break; 256 257 /* rtblk count */ 258 case XFS_TRANS_DQ_RTBCOUNT: 259 if (qtrx->qt_rtblk_res && delta > 0) { 260 qtrx->qt_rtblk_res_used += delta; 261 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used); 262 } 263 qtrx->qt_rtbcount_delta += delta; 264 break; 265 266 case XFS_TRANS_DQ_DELRTBCOUNT: 267 qtrx->qt_delrtb_delta += delta; 268 break; 269 270 default: 271 ASSERT(0); 272 } 273 274 if (delta) 275 trace_xfs_trans_mod_dquot_after(qtrx); 276 277 tp->t_flags |= XFS_TRANS_DQ_DIRTY; 278 } 279 280 281 /* 282 * Given an array of dqtrx structures, lock all the dquots associated and join 283 * them to the transaction, provided they have been modified. We know that the 284 * highest number of dquots of one type - usr, grp and prj - involved in a 285 * transaction is 3 so we don't need to make this very generic. 286 */ 287 STATIC void 288 xfs_trans_dqlockedjoin( 289 struct xfs_trans *tp, 290 struct xfs_dqtrx *q) 291 { 292 ASSERT(q[0].qt_dquot != NULL); 293 if (q[1].qt_dquot == NULL) { 294 xfs_dqlock(q[0].qt_dquot); 295 xfs_trans_dqjoin(tp, q[0].qt_dquot); 296 } else { 297 ASSERT(XFS_QM_TRANS_MAXDQS == 2); 298 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot); 299 xfs_trans_dqjoin(tp, q[0].qt_dquot); 300 xfs_trans_dqjoin(tp, q[1].qt_dquot); 301 } 302 } 303 304 /* Apply dqtrx changes to the quota reservation counters. */ 305 static inline void 306 xfs_apply_quota_reservation_deltas( 307 struct xfs_dquot_res *res, 308 uint64_t reserved, 309 int64_t res_used, 310 int64_t count_delta) 311 { 312 if (reserved != 0) { 313 /* 314 * Subtle math here: If reserved > res_used (the normal case), 315 * we're simply subtracting the unused transaction quota 316 * reservation from the dquot reservation. 317 * 318 * If, however, res_used > reserved, then we have allocated 319 * more quota blocks than were reserved for the transaction. 320 * We must add that excess to the dquot reservation since it 321 * tracks (usage + resv) and by definition we didn't reserve 322 * that excess. 323 */ 324 res->reserved -= abs(reserved - res_used); 325 } else if (count_delta != 0) { 326 /* 327 * These blks were never reserved, either inside a transaction 328 * or outside one (in a delayed allocation). Also, this isn't 329 * always a negative number since we sometimes deliberately 330 * skip quota reservations. 331 */ 332 res->reserved += count_delta; 333 } 334 } 335 336 /* 337 * Called by xfs_trans_commit() and similar in spirit to 338 * xfs_trans_apply_sb_deltas(). 339 * Go thru all the dquots belonging to this transaction and modify the 340 * INCORE dquot to reflect the actual usages. 341 * Unreserve just the reservations done by this transaction. 342 * dquot is still left locked at exit. 343 */ 344 void 345 xfs_trans_apply_dquot_deltas( 346 struct xfs_trans *tp) 347 { 348 int i, j; 349 struct xfs_dquot *dqp; 350 struct xfs_dqtrx *qtrx, *qa; 351 int64_t totalbdelta; 352 int64_t totalrtbdelta; 353 354 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY)) 355 return; 356 357 ASSERT(tp->t_dqinfo); 358 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) { 359 qa = tp->t_dqinfo->dqs[j]; 360 if (qa[0].qt_dquot == NULL) 361 continue; 362 363 /* 364 * Lock all of the dquots and join them to the transaction. 365 */ 366 xfs_trans_dqlockedjoin(tp, qa); 367 368 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) { 369 uint64_t blk_res_used; 370 371 qtrx = &qa[i]; 372 /* 373 * The array of dquots is filled 374 * sequentially, not sparsely. 375 */ 376 if ((dqp = qtrx->qt_dquot) == NULL) 377 break; 378 379 ASSERT(XFS_DQ_IS_LOCKED(dqp)); 380 381 /* 382 * adjust the actual number of blocks used 383 */ 384 385 /* 386 * The issue here is - sometimes we don't make a blkquota 387 * reservation intentionally to be fair to users 388 * (when the amount is small). On the other hand, 389 * delayed allocs do make reservations, but that's 390 * outside of a transaction, so we have no 391 * idea how much was really reserved. 392 * So, here we've accumulated delayed allocation blks and 393 * non-delay blks. The assumption is that the 394 * delayed ones are always reserved (outside of a 395 * transaction), and the others may or may not have 396 * quota reservations. 397 */ 398 totalbdelta = qtrx->qt_bcount_delta + 399 qtrx->qt_delbcnt_delta; 400 totalrtbdelta = qtrx->qt_rtbcount_delta + 401 qtrx->qt_delrtb_delta; 402 403 if (totalbdelta != 0 || totalrtbdelta != 0 || 404 qtrx->qt_icount_delta != 0) { 405 trace_xfs_trans_apply_dquot_deltas_before(dqp); 406 trace_xfs_trans_apply_dquot_deltas(qtrx); 407 } 408 409 #ifdef DEBUG 410 if (totalbdelta < 0) 411 ASSERT(dqp->q_blk.count >= -totalbdelta); 412 413 if (totalrtbdelta < 0) 414 ASSERT(dqp->q_rtb.count >= -totalrtbdelta); 415 416 if (qtrx->qt_icount_delta < 0) 417 ASSERT(dqp->q_ino.count >= -qtrx->qt_icount_delta); 418 #endif 419 if (totalbdelta) 420 dqp->q_blk.count += totalbdelta; 421 422 if (qtrx->qt_icount_delta) 423 dqp->q_ino.count += qtrx->qt_icount_delta; 424 425 if (totalrtbdelta) 426 dqp->q_rtb.count += totalrtbdelta; 427 428 if (totalbdelta != 0 || totalrtbdelta != 0 || 429 qtrx->qt_icount_delta != 0) 430 trace_xfs_trans_apply_dquot_deltas_after(dqp); 431 432 /* 433 * Get any default limits in use. 434 * Start/reset the timer(s) if needed. 435 */ 436 if (dqp->q_id) { 437 xfs_qm_adjust_dqlimits(dqp); 438 xfs_qm_adjust_dqtimers(dqp); 439 } 440 441 dqp->q_flags |= XFS_DQFLAG_DIRTY; 442 /* 443 * add this to the list of items to get logged 444 */ 445 xfs_trans_log_dquot(tp, dqp); 446 /* 447 * Take off what's left of the original reservation. 448 * In case of delayed allocations, there's no 449 * reservation that a transaction structure knows of. 450 */ 451 blk_res_used = max_t(int64_t, 0, qtrx->qt_bcount_delta); 452 xfs_apply_quota_reservation_deltas(&dqp->q_blk, 453 qtrx->qt_blk_res, blk_res_used, 454 qtrx->qt_bcount_delta); 455 456 /* 457 * Adjust the RT reservation. 458 */ 459 xfs_apply_quota_reservation_deltas(&dqp->q_rtb, 460 qtrx->qt_rtblk_res, 461 qtrx->qt_rtblk_res_used, 462 qtrx->qt_rtbcount_delta); 463 464 /* 465 * Adjust the inode reservation. 466 */ 467 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used); 468 xfs_apply_quota_reservation_deltas(&dqp->q_ino, 469 qtrx->qt_ino_res, 470 qtrx->qt_ino_res_used, 471 qtrx->qt_icount_delta); 472 473 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count); 474 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count); 475 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count); 476 } 477 } 478 } 479 480 /* 481 * Release the reservations, and adjust the dquots accordingly. 482 * This is called only when the transaction is being aborted. If by 483 * any chance we have done dquot modifications incore (ie. deltas) already, 484 * we simply throw those away, since that's the expected behavior 485 * when a transaction is curtailed without a commit. 486 */ 487 void 488 xfs_trans_unreserve_and_mod_dquots( 489 struct xfs_trans *tp) 490 { 491 int i, j; 492 struct xfs_dquot *dqp; 493 struct xfs_dqtrx *qtrx, *qa; 494 bool locked; 495 496 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY)) 497 return; 498 499 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) { 500 qa = tp->t_dqinfo->dqs[j]; 501 502 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) { 503 qtrx = &qa[i]; 504 /* 505 * We assume that the array of dquots is filled 506 * sequentially, not sparsely. 507 */ 508 if ((dqp = qtrx->qt_dquot) == NULL) 509 break; 510 /* 511 * Unreserve the original reservation. We don't care 512 * about the number of blocks used field, or deltas. 513 * Also we don't bother to zero the fields. 514 */ 515 locked = false; 516 if (qtrx->qt_blk_res) { 517 xfs_dqlock(dqp); 518 locked = true; 519 dqp->q_blk.reserved -= 520 (xfs_qcnt_t)qtrx->qt_blk_res; 521 } 522 if (qtrx->qt_ino_res) { 523 if (!locked) { 524 xfs_dqlock(dqp); 525 locked = true; 526 } 527 dqp->q_ino.reserved -= 528 (xfs_qcnt_t)qtrx->qt_ino_res; 529 } 530 531 if (qtrx->qt_rtblk_res) { 532 if (!locked) { 533 xfs_dqlock(dqp); 534 locked = true; 535 } 536 dqp->q_rtb.reserved -= 537 (xfs_qcnt_t)qtrx->qt_rtblk_res; 538 } 539 if (locked) 540 xfs_dqunlock(dqp); 541 542 } 543 } 544 } 545 546 STATIC void 547 xfs_quota_warn( 548 struct xfs_mount *mp, 549 struct xfs_dquot *dqp, 550 int type) 551 { 552 enum quota_type qtype; 553 554 switch (xfs_dquot_type(dqp)) { 555 case XFS_DQTYPE_PROJ: 556 qtype = PRJQUOTA; 557 break; 558 case XFS_DQTYPE_USER: 559 qtype = USRQUOTA; 560 break; 561 case XFS_DQTYPE_GROUP: 562 qtype = GRPQUOTA; 563 break; 564 default: 565 return; 566 } 567 568 quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id), 569 mp->m_super->s_dev, type); 570 } 571 572 /* 573 * Decide if we can make an additional reservation against a quota resource. 574 * Returns an inode QUOTA_NL_ warning code and whether or not it's fatal. 575 * 576 * Note that we assume that the numeric difference between the inode and block 577 * warning codes will always be 3 since it's userspace ABI now, and will never 578 * decrease the quota reservation, so the *BELOW messages are irrelevant. 579 */ 580 static inline int 581 xfs_dqresv_check( 582 struct xfs_dquot_res *res, 583 struct xfs_quota_limits *qlim, 584 int64_t delta, 585 bool *fatal) 586 { 587 xfs_qcnt_t hardlimit = res->hardlimit; 588 xfs_qcnt_t softlimit = res->softlimit; 589 xfs_qcnt_t total_count = res->reserved + delta; 590 591 BUILD_BUG_ON(QUOTA_NL_BHARDWARN != QUOTA_NL_IHARDWARN + 3); 592 BUILD_BUG_ON(QUOTA_NL_BSOFTLONGWARN != QUOTA_NL_ISOFTLONGWARN + 3); 593 BUILD_BUG_ON(QUOTA_NL_BSOFTWARN != QUOTA_NL_ISOFTWARN + 3); 594 595 *fatal = false; 596 if (delta <= 0) 597 return QUOTA_NL_NOWARN; 598 599 if (!hardlimit) 600 hardlimit = qlim->hard; 601 if (!softlimit) 602 softlimit = qlim->soft; 603 604 if (hardlimit && total_count > hardlimit) { 605 *fatal = true; 606 return QUOTA_NL_IHARDWARN; 607 } 608 609 if (softlimit && total_count > softlimit) { 610 time64_t now = ktime_get_real_seconds(); 611 612 if ((res->timer != 0 && now > res->timer) || 613 (res->warnings != 0 && res->warnings >= qlim->warn)) { 614 *fatal = true; 615 return QUOTA_NL_ISOFTLONGWARN; 616 } 617 618 res->warnings++; 619 return QUOTA_NL_ISOFTWARN; 620 } 621 622 return QUOTA_NL_NOWARN; 623 } 624 625 /* 626 * This reserves disk blocks and inodes against a dquot. 627 * Flags indicate if the dquot is to be locked here and also 628 * if the blk reservation is for RT or regular blocks. 629 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check. 630 */ 631 STATIC int 632 xfs_trans_dqresv( 633 struct xfs_trans *tp, 634 struct xfs_mount *mp, 635 struct xfs_dquot *dqp, 636 int64_t nblks, 637 long ninos, 638 uint flags) 639 { 640 struct xfs_quotainfo *q = mp->m_quotainfo; 641 struct xfs_def_quota *defq; 642 struct xfs_dquot_res *blkres; 643 struct xfs_quota_limits *qlim; 644 645 xfs_dqlock(dqp); 646 647 defq = xfs_get_defquota(q, xfs_dquot_type(dqp)); 648 649 if (flags & XFS_TRANS_DQ_RES_BLKS) { 650 blkres = &dqp->q_blk; 651 qlim = &defq->blk; 652 } else { 653 blkres = &dqp->q_rtb; 654 qlim = &defq->rtb; 655 } 656 657 if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id && 658 xfs_dquot_is_enforced(dqp)) { 659 int quota_nl; 660 bool fatal; 661 662 /* 663 * dquot is locked already. See if we'd go over the hardlimit 664 * or exceed the timelimit if we'd reserve resources. 665 */ 666 quota_nl = xfs_dqresv_check(blkres, qlim, nblks, &fatal); 667 if (quota_nl != QUOTA_NL_NOWARN) { 668 /* 669 * Quota block warning codes are 3 more than the inode 670 * codes, which we check above. 671 */ 672 xfs_quota_warn(mp, dqp, quota_nl + 3); 673 if (fatal) 674 goto error_return; 675 } 676 677 quota_nl = xfs_dqresv_check(&dqp->q_ino, &defq->ino, ninos, 678 &fatal); 679 if (quota_nl != QUOTA_NL_NOWARN) { 680 xfs_quota_warn(mp, dqp, quota_nl); 681 if (fatal) 682 goto error_return; 683 } 684 } 685 686 /* 687 * Change the reservation, but not the actual usage. 688 * Note that q_blk.reserved = q_blk.count + resv 689 */ 690 blkres->reserved += (xfs_qcnt_t)nblks; 691 dqp->q_ino.reserved += (xfs_qcnt_t)ninos; 692 693 /* 694 * note the reservation amt in the trans struct too, 695 * so that the transaction knows how much was reserved by 696 * it against this particular dquot. 697 * We don't do this when we are reserving for a delayed allocation, 698 * because we don't have the luxury of a transaction envelope then. 699 */ 700 if (tp) { 701 ASSERT(tp->t_dqinfo); 702 ASSERT(flags & XFS_QMOPT_RESBLK_MASK); 703 if (nblks != 0) 704 xfs_trans_mod_dquot(tp, dqp, 705 flags & XFS_QMOPT_RESBLK_MASK, 706 nblks); 707 if (ninos != 0) 708 xfs_trans_mod_dquot(tp, dqp, 709 XFS_TRANS_DQ_RES_INOS, 710 ninos); 711 } 712 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count); 713 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count); 714 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count); 715 716 xfs_dqunlock(dqp); 717 return 0; 718 719 error_return: 720 xfs_dqunlock(dqp); 721 if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ) 722 return -ENOSPC; 723 return -EDQUOT; 724 } 725 726 727 /* 728 * Given dquot(s), make disk block and/or inode reservations against them. 729 * The fact that this does the reservation against user, group and 730 * project quotas is important, because this follows a all-or-nothing 731 * approach. 732 * 733 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown. 734 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota. 735 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks 736 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks 737 * dquots are unlocked on return, if they were not locked by caller. 738 */ 739 int 740 xfs_trans_reserve_quota_bydquots( 741 struct xfs_trans *tp, 742 struct xfs_mount *mp, 743 struct xfs_dquot *udqp, 744 struct xfs_dquot *gdqp, 745 struct xfs_dquot *pdqp, 746 int64_t nblks, 747 long ninos, 748 uint flags) 749 { 750 int error; 751 752 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) 753 return 0; 754 755 if (tp && tp->t_dqinfo == NULL) 756 xfs_trans_alloc_dqinfo(tp); 757 758 ASSERT(flags & XFS_QMOPT_RESBLK_MASK); 759 760 if (udqp) { 761 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos, flags); 762 if (error) 763 return error; 764 } 765 766 if (gdqp) { 767 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags); 768 if (error) 769 goto unwind_usr; 770 } 771 772 if (pdqp) { 773 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags); 774 if (error) 775 goto unwind_grp; 776 } 777 778 /* 779 * Didn't change anything critical, so, no need to log 780 */ 781 return 0; 782 783 unwind_grp: 784 flags |= XFS_QMOPT_FORCE_RES; 785 if (gdqp) 786 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags); 787 unwind_usr: 788 flags |= XFS_QMOPT_FORCE_RES; 789 if (udqp) 790 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags); 791 return error; 792 } 793 794 795 /* 796 * Lock the dquot and change the reservation if we can. 797 * This doesn't change the actual usage, just the reservation. 798 * The inode sent in is locked. 799 */ 800 int 801 xfs_trans_reserve_quota_nblks( 802 struct xfs_trans *tp, 803 struct xfs_inode *ip, 804 int64_t nblks, 805 long ninos, 806 uint flags) 807 { 808 struct xfs_mount *mp = ip->i_mount; 809 810 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) 811 return 0; 812 813 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino)); 814 815 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 816 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES)) == XFS_TRANS_DQ_RES_RTBLKS || 817 (flags & ~(XFS_QMOPT_FORCE_RES)) == XFS_TRANS_DQ_RES_BLKS); 818 819 /* 820 * Reserve nblks against these dquots, with trans as the mediator. 821 */ 822 return xfs_trans_reserve_quota_bydquots(tp, mp, 823 ip->i_udquot, ip->i_gdquot, 824 ip->i_pdquot, 825 nblks, ninos, flags); 826 } 827 828 /* 829 * This routine is called to allocate a quotaoff log item. 830 */ 831 struct xfs_qoff_logitem * 832 xfs_trans_get_qoff_item( 833 struct xfs_trans *tp, 834 struct xfs_qoff_logitem *startqoff, 835 uint flags) 836 { 837 struct xfs_qoff_logitem *q; 838 839 ASSERT(tp != NULL); 840 841 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags); 842 ASSERT(q != NULL); 843 844 /* 845 * Get a log_item_desc to point at the new item. 846 */ 847 xfs_trans_add_item(tp, &q->qql_item); 848 return q; 849 } 850 851 852 /* 853 * This is called to mark the quotaoff logitem as needing 854 * to be logged when the transaction is committed. The logitem must 855 * already be associated with the given transaction. 856 */ 857 void 858 xfs_trans_log_quotaoff_item( 859 struct xfs_trans *tp, 860 struct xfs_qoff_logitem *qlp) 861 { 862 tp->t_flags |= XFS_TRANS_DIRTY; 863 set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags); 864 } 865 866 STATIC void 867 xfs_trans_alloc_dqinfo( 868 xfs_trans_t *tp) 869 { 870 tp->t_dqinfo = kmem_cache_zalloc(xfs_qm_dqtrxzone, 871 GFP_KERNEL | __GFP_NOFAIL); 872 } 873 874 void 875 xfs_trans_free_dqinfo( 876 xfs_trans_t *tp) 877 { 878 if (!tp->t_dqinfo) 879 return; 880 kmem_cache_free(xfs_qm_dqtrxzone, tp->t_dqinfo); 881 tp->t_dqinfo = NULL; 882 } 883