1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #include <linux/capability.h> 20 21 #include "xfs.h" 22 #include "xfs_fs.h" 23 #include "xfs_bit.h" 24 #include "xfs_log.h" 25 #include "xfs_inum.h" 26 #include "xfs_trans.h" 27 #include "xfs_sb.h" 28 #include "xfs_ag.h" 29 #include "xfs_alloc.h" 30 #include "xfs_quota.h" 31 #include "xfs_mount.h" 32 #include "xfs_bmap_btree.h" 33 #include "xfs_inode.h" 34 #include "xfs_inode_item.h" 35 #include "xfs_itable.h" 36 #include "xfs_bmap.h" 37 #include "xfs_rtalloc.h" 38 #include "xfs_error.h" 39 #include "xfs_attr.h" 40 #include "xfs_buf_item.h" 41 #include "xfs_utils.h" 42 #include "xfs_qm.h" 43 #include "xfs_trace.h" 44 45 STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint); 46 STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *, 47 uint); 48 STATIC uint xfs_qm_export_flags(uint); 49 STATIC uint xfs_qm_export_qtype_flags(uint); 50 STATIC void xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *, 51 fs_disk_quota_t *); 52 53 54 /* 55 * Turn off quota accounting and/or enforcement for all udquots and/or 56 * gdquots. Called only at unmount time. 57 * 58 * This assumes that there are no dquots of this file system cached 59 * incore, and modifies the ondisk dquot directly. Therefore, for example, 60 * it is an error to call this twice, without purging the cache. 61 */ 62 int 63 xfs_qm_scall_quotaoff( 64 xfs_mount_t *mp, 65 uint flags) 66 { 67 struct xfs_quotainfo *q = mp->m_quotainfo; 68 uint dqtype; 69 int error; 70 uint inactivate_flags; 71 xfs_qoff_logitem_t *qoffstart; 72 int nculprits; 73 74 /* 75 * No file system can have quotas enabled on disk but not in core. 76 * Note that quota utilities (like quotaoff) _expect_ 77 * errno == EEXIST here. 78 */ 79 if ((mp->m_qflags & flags) == 0) 80 return XFS_ERROR(EEXIST); 81 error = 0; 82 83 flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD); 84 85 /* 86 * We don't want to deal with two quotaoffs messing up each other, 87 * so we're going to serialize it. quotaoff isn't exactly a performance 88 * critical thing. 89 * If quotaoff, then we must be dealing with the root filesystem. 90 */ 91 ASSERT(q); 92 mutex_lock(&q->qi_quotaofflock); 93 94 /* 95 * If we're just turning off quota enforcement, change mp and go. 96 */ 97 if ((flags & XFS_ALL_QUOTA_ACCT) == 0) { 98 mp->m_qflags &= ~(flags); 99 100 spin_lock(&mp->m_sb_lock); 101 mp->m_sb.sb_qflags = mp->m_qflags; 102 spin_unlock(&mp->m_sb_lock); 103 mutex_unlock(&q->qi_quotaofflock); 104 105 /* XXX what to do if error ? Revert back to old vals incore ? */ 106 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS); 107 return (error); 108 } 109 110 dqtype = 0; 111 inactivate_flags = 0; 112 /* 113 * If accounting is off, we must turn enforcement off, clear the 114 * quota 'CHKD' certificate to make it known that we have to 115 * do a quotacheck the next time this quota is turned on. 116 */ 117 if (flags & XFS_UQUOTA_ACCT) { 118 dqtype |= XFS_QMOPT_UQUOTA; 119 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD); 120 inactivate_flags |= XFS_UQUOTA_ACTIVE; 121 } 122 if (flags & XFS_GQUOTA_ACCT) { 123 dqtype |= XFS_QMOPT_GQUOTA; 124 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD); 125 inactivate_flags |= XFS_GQUOTA_ACTIVE; 126 } else if (flags & XFS_PQUOTA_ACCT) { 127 dqtype |= XFS_QMOPT_PQUOTA; 128 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD); 129 inactivate_flags |= XFS_PQUOTA_ACTIVE; 130 } 131 132 /* 133 * Nothing to do? Don't complain. This happens when we're just 134 * turning off quota enforcement. 135 */ 136 if ((mp->m_qflags & flags) == 0) 137 goto out_unlock; 138 139 /* 140 * Write the LI_QUOTAOFF log record, and do SB changes atomically, 141 * and synchronously. If we fail to write, we should abort the 142 * operation as it cannot be recovered safely if we crash. 143 */ 144 error = xfs_qm_log_quotaoff(mp, &qoffstart, flags); 145 if (error) 146 goto out_unlock; 147 148 /* 149 * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct 150 * to take care of the race between dqget and quotaoff. We don't take 151 * any special locks to reset these bits. All processes need to check 152 * these bits *after* taking inode lock(s) to see if the particular 153 * quota type is in the process of being turned off. If *ACTIVE, it is 154 * guaranteed that all dquot structures and all quotainode ptrs will all 155 * stay valid as long as that inode is kept locked. 156 * 157 * There is no turning back after this. 158 */ 159 mp->m_qflags &= ~inactivate_flags; 160 161 /* 162 * Give back all the dquot reference(s) held by inodes. 163 * Here we go thru every single incore inode in this file system, and 164 * do a dqrele on the i_udquot/i_gdquot that it may have. 165 * Essentially, as long as somebody has an inode locked, this guarantees 166 * that quotas will not be turned off. This is handy because in a 167 * transaction once we lock the inode(s) and check for quotaon, we can 168 * depend on the quota inodes (and other things) being valid as long as 169 * we keep the lock(s). 170 */ 171 xfs_qm_dqrele_all_inodes(mp, flags); 172 173 /* 174 * Next we make the changes in the quota flag in the mount struct. 175 * This isn't protected by a particular lock directly, because we 176 * don't want to take a mrlock every time we depend on quotas being on. 177 */ 178 mp->m_qflags &= ~(flags); 179 180 /* 181 * Go through all the dquots of this file system and purge them, 182 * according to what was turned off. We may not be able to get rid 183 * of all dquots, because dquots can have temporary references that 184 * are not attached to inodes. eg. xfs_setattr, xfs_create. 185 * So, if we couldn't purge all the dquots from the filesystem, 186 * we can't get rid of the incore data structures. 187 */ 188 while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype))) 189 delay(10 * nculprits); 190 191 /* 192 * Transactions that had started before ACTIVE state bit was cleared 193 * could have logged many dquots, so they'd have higher LSNs than 194 * the first QUOTAOFF log record does. If we happen to crash when 195 * the tail of the log has gone past the QUOTAOFF record, but 196 * before the last dquot modification, those dquots __will__ 197 * recover, and that's not good. 198 * 199 * So, we have QUOTAOFF start and end logitems; the start 200 * logitem won't get overwritten until the end logitem appears... 201 */ 202 error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags); 203 if (error) { 204 /* We're screwed now. Shutdown is the only option. */ 205 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 206 goto out_unlock; 207 } 208 209 /* 210 * If quotas is completely disabled, close shop. 211 */ 212 if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) || 213 ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) { 214 mutex_unlock(&q->qi_quotaofflock); 215 xfs_qm_destroy_quotainfo(mp); 216 return (0); 217 } 218 219 /* 220 * Release our quotainode references if we don't need them anymore. 221 */ 222 if ((dqtype & XFS_QMOPT_UQUOTA) && q->qi_uquotaip) { 223 IRELE(q->qi_uquotaip); 224 q->qi_uquotaip = NULL; 225 } 226 if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && q->qi_gquotaip) { 227 IRELE(q->qi_gquotaip); 228 q->qi_gquotaip = NULL; 229 } 230 231 out_unlock: 232 mutex_unlock(&q->qi_quotaofflock); 233 return error; 234 } 235 236 STATIC int 237 xfs_qm_scall_trunc_qfile( 238 struct xfs_mount *mp, 239 xfs_ino_t ino) 240 { 241 struct xfs_inode *ip; 242 struct xfs_trans *tp; 243 int error; 244 245 if (ino == NULLFSINO) 246 return 0; 247 248 error = xfs_iget(mp, NULL, ino, 0, 0, &ip); 249 if (error) 250 return error; 251 252 xfs_ilock(ip, XFS_IOLOCK_EXCL); 253 254 tp = xfs_trans_alloc(mp, XFS_TRANS_TRUNCATE_FILE); 255 error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, 256 XFS_TRANS_PERM_LOG_RES, 257 XFS_ITRUNCATE_LOG_COUNT); 258 if (error) { 259 xfs_trans_cancel(tp, 0); 260 xfs_iunlock(ip, XFS_IOLOCK_EXCL); 261 goto out_put; 262 } 263 264 xfs_ilock(ip, XFS_ILOCK_EXCL); 265 xfs_trans_ijoin(tp, ip, 0); 266 267 ip->i_d.di_size = 0; 268 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 269 270 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); 271 if (error) { 272 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | 273 XFS_TRANS_ABORT); 274 goto out_unlock; 275 } 276 277 ASSERT(ip->i_d.di_nextents == 0); 278 279 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); 280 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); 281 282 out_unlock: 283 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); 284 out_put: 285 IRELE(ip); 286 return error; 287 } 288 289 int 290 xfs_qm_scall_trunc_qfiles( 291 xfs_mount_t *mp, 292 uint flags) 293 { 294 int error = 0, error2 = 0; 295 296 if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0) { 297 xfs_debug(mp, "%s: flags=%x m_qflags=%x\n", 298 __func__, flags, mp->m_qflags); 299 return XFS_ERROR(EINVAL); 300 } 301 302 if (flags & XFS_DQ_USER) 303 error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino); 304 if (flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) 305 error2 = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino); 306 307 return error ? error : error2; 308 } 309 310 /* 311 * Switch on (a given) quota enforcement for a filesystem. This takes 312 * effect immediately. 313 * (Switching on quota accounting must be done at mount time.) 314 */ 315 int 316 xfs_qm_scall_quotaon( 317 xfs_mount_t *mp, 318 uint flags) 319 { 320 int error; 321 uint qf; 322 __int64_t sbflags; 323 324 flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD); 325 /* 326 * Switching on quota accounting must be done at mount time. 327 */ 328 flags &= ~(XFS_ALL_QUOTA_ACCT); 329 330 sbflags = 0; 331 332 if (flags == 0) { 333 xfs_debug(mp, "%s: zero flags, m_qflags=%x\n", 334 __func__, mp->m_qflags); 335 return XFS_ERROR(EINVAL); 336 } 337 338 /* No fs can turn on quotas with a delayed effect */ 339 ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0); 340 341 /* 342 * Can't enforce without accounting. We check the superblock 343 * qflags here instead of m_qflags because rootfs can have 344 * quota acct on ondisk without m_qflags' knowing. 345 */ 346 if (((flags & XFS_UQUOTA_ACCT) == 0 && 347 (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 && 348 (flags & XFS_UQUOTA_ENFD)) 349 || 350 ((flags & XFS_PQUOTA_ACCT) == 0 && 351 (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 && 352 (flags & XFS_GQUOTA_ACCT) == 0 && 353 (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 && 354 (flags & XFS_OQUOTA_ENFD))) { 355 xfs_debug(mp, 356 "%s: Can't enforce without acct, flags=%x sbflags=%x\n", 357 __func__, flags, mp->m_sb.sb_qflags); 358 return XFS_ERROR(EINVAL); 359 } 360 /* 361 * If everything's up to-date incore, then don't waste time. 362 */ 363 if ((mp->m_qflags & flags) == flags) 364 return XFS_ERROR(EEXIST); 365 366 /* 367 * Change sb_qflags on disk but not incore mp->qflags 368 * if this is the root filesystem. 369 */ 370 spin_lock(&mp->m_sb_lock); 371 qf = mp->m_sb.sb_qflags; 372 mp->m_sb.sb_qflags = qf | flags; 373 spin_unlock(&mp->m_sb_lock); 374 375 /* 376 * There's nothing to change if it's the same. 377 */ 378 if ((qf & flags) == flags && sbflags == 0) 379 return XFS_ERROR(EEXIST); 380 sbflags |= XFS_SB_QFLAGS; 381 382 if ((error = xfs_qm_write_sb_changes(mp, sbflags))) 383 return (error); 384 /* 385 * If we aren't trying to switch on quota enforcement, we are done. 386 */ 387 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) != 388 (mp->m_qflags & XFS_UQUOTA_ACCT)) || 389 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) != 390 (mp->m_qflags & XFS_PQUOTA_ACCT)) || 391 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) != 392 (mp->m_qflags & XFS_GQUOTA_ACCT)) || 393 (flags & XFS_ALL_QUOTA_ENFD) == 0) 394 return (0); 395 396 if (! XFS_IS_QUOTA_RUNNING(mp)) 397 return XFS_ERROR(ESRCH); 398 399 /* 400 * Switch on quota enforcement in core. 401 */ 402 mutex_lock(&mp->m_quotainfo->qi_quotaofflock); 403 mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD); 404 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock); 405 406 return (0); 407 } 408 409 410 /* 411 * Return quota status information, such as uquota-off, enforcements, etc. 412 */ 413 int 414 xfs_qm_scall_getqstat( 415 struct xfs_mount *mp, 416 struct fs_quota_stat *out) 417 { 418 struct xfs_quotainfo *q = mp->m_quotainfo; 419 struct xfs_inode *uip, *gip; 420 boolean_t tempuqip, tempgqip; 421 422 uip = gip = NULL; 423 tempuqip = tempgqip = B_FALSE; 424 memset(out, 0, sizeof(fs_quota_stat_t)); 425 426 out->qs_version = FS_QSTAT_VERSION; 427 if (!xfs_sb_version_hasquota(&mp->m_sb)) { 428 out->qs_uquota.qfs_ino = NULLFSINO; 429 out->qs_gquota.qfs_ino = NULLFSINO; 430 return (0); 431 } 432 out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags & 433 (XFS_ALL_QUOTA_ACCT| 434 XFS_ALL_QUOTA_ENFD)); 435 out->qs_pad = 0; 436 out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino; 437 out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino; 438 439 if (q) { 440 uip = q->qi_uquotaip; 441 gip = q->qi_gquotaip; 442 } 443 if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) { 444 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 445 0, 0, &uip) == 0) 446 tempuqip = B_TRUE; 447 } 448 if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) { 449 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 450 0, 0, &gip) == 0) 451 tempgqip = B_TRUE; 452 } 453 if (uip) { 454 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks; 455 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents; 456 if (tempuqip) 457 IRELE(uip); 458 } 459 if (gip) { 460 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks; 461 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents; 462 if (tempgqip) 463 IRELE(gip); 464 } 465 if (q) { 466 out->qs_incoredqs = q->qi_dquots; 467 out->qs_btimelimit = q->qi_btimelimit; 468 out->qs_itimelimit = q->qi_itimelimit; 469 out->qs_rtbtimelimit = q->qi_rtbtimelimit; 470 out->qs_bwarnlimit = q->qi_bwarnlimit; 471 out->qs_iwarnlimit = q->qi_iwarnlimit; 472 } 473 return 0; 474 } 475 476 #define XFS_DQ_MASK \ 477 (FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK) 478 479 /* 480 * Adjust quota limits, and start/stop timers accordingly. 481 */ 482 int 483 xfs_qm_scall_setqlim( 484 xfs_mount_t *mp, 485 xfs_dqid_t id, 486 uint type, 487 fs_disk_quota_t *newlim) 488 { 489 struct xfs_quotainfo *q = mp->m_quotainfo; 490 xfs_disk_dquot_t *ddq; 491 xfs_dquot_t *dqp; 492 xfs_trans_t *tp; 493 int error; 494 xfs_qcnt_t hard, soft; 495 496 if (newlim->d_fieldmask & ~XFS_DQ_MASK) 497 return EINVAL; 498 if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0) 499 return 0; 500 501 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM); 502 if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128, 503 0, 0, XFS_DEFAULT_LOG_COUNT))) { 504 xfs_trans_cancel(tp, 0); 505 return (error); 506 } 507 508 /* 509 * We don't want to race with a quotaoff so take the quotaoff lock. 510 * (We don't hold an inode lock, so there's nothing else to stop 511 * a quotaoff from happening). (XXXThis doesn't currently happen 512 * because we take the vfslock before calling xfs_qm_sysent). 513 */ 514 mutex_lock(&q->qi_quotaofflock); 515 516 /* 517 * Get the dquot (locked), and join it to the transaction. 518 * Allocate the dquot if this doesn't exist. 519 */ 520 if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) { 521 xfs_trans_cancel(tp, XFS_TRANS_ABORT); 522 ASSERT(error != ENOENT); 523 goto out_unlock; 524 } 525 xfs_trans_dqjoin(tp, dqp); 526 ddq = &dqp->q_core; 527 528 /* 529 * Make sure that hardlimits are >= soft limits before changing. 530 */ 531 hard = (newlim->d_fieldmask & FS_DQ_BHARD) ? 532 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) : 533 be64_to_cpu(ddq->d_blk_hardlimit); 534 soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ? 535 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) : 536 be64_to_cpu(ddq->d_blk_softlimit); 537 if (hard == 0 || hard >= soft) { 538 ddq->d_blk_hardlimit = cpu_to_be64(hard); 539 ddq->d_blk_softlimit = cpu_to_be64(soft); 540 if (id == 0) { 541 q->qi_bhardlimit = hard; 542 q->qi_bsoftlimit = soft; 543 } 544 } else { 545 xfs_debug(mp, "blkhard %Ld < blksoft %Ld\n", hard, soft); 546 } 547 hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ? 548 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) : 549 be64_to_cpu(ddq->d_rtb_hardlimit); 550 soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ? 551 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) : 552 be64_to_cpu(ddq->d_rtb_softlimit); 553 if (hard == 0 || hard >= soft) { 554 ddq->d_rtb_hardlimit = cpu_to_be64(hard); 555 ddq->d_rtb_softlimit = cpu_to_be64(soft); 556 if (id == 0) { 557 q->qi_rtbhardlimit = hard; 558 q->qi_rtbsoftlimit = soft; 559 } 560 } else { 561 xfs_debug(mp, "rtbhard %Ld < rtbsoft %Ld\n", hard, soft); 562 } 563 564 hard = (newlim->d_fieldmask & FS_DQ_IHARD) ? 565 (xfs_qcnt_t) newlim->d_ino_hardlimit : 566 be64_to_cpu(ddq->d_ino_hardlimit); 567 soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ? 568 (xfs_qcnt_t) newlim->d_ino_softlimit : 569 be64_to_cpu(ddq->d_ino_softlimit); 570 if (hard == 0 || hard >= soft) { 571 ddq->d_ino_hardlimit = cpu_to_be64(hard); 572 ddq->d_ino_softlimit = cpu_to_be64(soft); 573 if (id == 0) { 574 q->qi_ihardlimit = hard; 575 q->qi_isoftlimit = soft; 576 } 577 } else { 578 xfs_debug(mp, "ihard %Ld < isoft %Ld\n", hard, soft); 579 } 580 581 /* 582 * Update warnings counter(s) if requested 583 */ 584 if (newlim->d_fieldmask & FS_DQ_BWARNS) 585 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns); 586 if (newlim->d_fieldmask & FS_DQ_IWARNS) 587 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns); 588 if (newlim->d_fieldmask & FS_DQ_RTBWARNS) 589 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns); 590 591 if (id == 0) { 592 /* 593 * Timelimits for the super user set the relative time 594 * the other users can be over quota for this file system. 595 * If it is zero a default is used. Ditto for the default 596 * soft and hard limit values (already done, above), and 597 * for warnings. 598 */ 599 if (newlim->d_fieldmask & FS_DQ_BTIMER) { 600 q->qi_btimelimit = newlim->d_btimer; 601 ddq->d_btimer = cpu_to_be32(newlim->d_btimer); 602 } 603 if (newlim->d_fieldmask & FS_DQ_ITIMER) { 604 q->qi_itimelimit = newlim->d_itimer; 605 ddq->d_itimer = cpu_to_be32(newlim->d_itimer); 606 } 607 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) { 608 q->qi_rtbtimelimit = newlim->d_rtbtimer; 609 ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer); 610 } 611 if (newlim->d_fieldmask & FS_DQ_BWARNS) 612 q->qi_bwarnlimit = newlim->d_bwarns; 613 if (newlim->d_fieldmask & FS_DQ_IWARNS) 614 q->qi_iwarnlimit = newlim->d_iwarns; 615 if (newlim->d_fieldmask & FS_DQ_RTBWARNS) 616 q->qi_rtbwarnlimit = newlim->d_rtbwarns; 617 } else { 618 /* 619 * If the user is now over quota, start the timelimit. 620 * The user will not be 'warned'. 621 * Note that we keep the timers ticking, whether enforcement 622 * is on or off. We don't really want to bother with iterating 623 * over all ondisk dquots and turning the timers on/off. 624 */ 625 xfs_qm_adjust_dqtimers(mp, ddq); 626 } 627 dqp->dq_flags |= XFS_DQ_DIRTY; 628 xfs_trans_log_dquot(tp, dqp); 629 630 error = xfs_trans_commit(tp, 0); 631 xfs_qm_dqrele(dqp); 632 633 out_unlock: 634 mutex_unlock(&q->qi_quotaofflock); 635 return error; 636 } 637 638 int 639 xfs_qm_scall_getquota( 640 xfs_mount_t *mp, 641 xfs_dqid_t id, 642 uint type, 643 fs_disk_quota_t *out) 644 { 645 xfs_dquot_t *dqp; 646 int error; 647 648 /* 649 * Try to get the dquot. We don't want it allocated on disk, so 650 * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't 651 * exist, we'll get ENOENT back. 652 */ 653 if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) { 654 return (error); 655 } 656 657 /* 658 * If everything's NULL, this dquot doesn't quite exist as far as 659 * our utility programs are concerned. 660 */ 661 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) { 662 xfs_qm_dqput(dqp); 663 return XFS_ERROR(ENOENT); 664 } 665 /* 666 * Convert the disk dquot to the exportable format 667 */ 668 xfs_qm_export_dquot(mp, &dqp->q_core, out); 669 xfs_qm_dqput(dqp); 670 return (error ? XFS_ERROR(EFAULT) : 0); 671 } 672 673 674 STATIC int 675 xfs_qm_log_quotaoff_end( 676 xfs_mount_t *mp, 677 xfs_qoff_logitem_t *startqoff, 678 uint flags) 679 { 680 xfs_trans_t *tp; 681 int error; 682 xfs_qoff_logitem_t *qoffi; 683 684 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END); 685 686 if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2, 687 0, 0, XFS_DEFAULT_LOG_COUNT))) { 688 xfs_trans_cancel(tp, 0); 689 return (error); 690 } 691 692 qoffi = xfs_trans_get_qoff_item(tp, startqoff, 693 flags & XFS_ALL_QUOTA_ACCT); 694 xfs_trans_log_quotaoff_item(tp, qoffi); 695 696 /* 697 * We have to make sure that the transaction is secure on disk before we 698 * return and actually stop quota accounting. So, make it synchronous. 699 * We don't care about quotoff's performance. 700 */ 701 xfs_trans_set_sync(tp); 702 error = xfs_trans_commit(tp, 0); 703 return (error); 704 } 705 706 707 STATIC int 708 xfs_qm_log_quotaoff( 709 xfs_mount_t *mp, 710 xfs_qoff_logitem_t **qoffstartp, 711 uint flags) 712 { 713 xfs_trans_t *tp; 714 int error; 715 xfs_qoff_logitem_t *qoffi=NULL; 716 uint oldsbqflag=0; 717 718 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF); 719 if ((error = xfs_trans_reserve(tp, 0, 720 sizeof(xfs_qoff_logitem_t) * 2 + 721 mp->m_sb.sb_sectsize + 128, 722 0, 723 0, 724 XFS_DEFAULT_LOG_COUNT))) { 725 goto error0; 726 } 727 728 qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT); 729 xfs_trans_log_quotaoff_item(tp, qoffi); 730 731 spin_lock(&mp->m_sb_lock); 732 oldsbqflag = mp->m_sb.sb_qflags; 733 mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL; 734 spin_unlock(&mp->m_sb_lock); 735 736 xfs_mod_sb(tp, XFS_SB_QFLAGS); 737 738 /* 739 * We have to make sure that the transaction is secure on disk before we 740 * return and actually stop quota accounting. So, make it synchronous. 741 * We don't care about quotoff's performance. 742 */ 743 xfs_trans_set_sync(tp); 744 error = xfs_trans_commit(tp, 0); 745 746 error0: 747 if (error) { 748 xfs_trans_cancel(tp, 0); 749 /* 750 * No one else is modifying sb_qflags, so this is OK. 751 * We still hold the quotaofflock. 752 */ 753 spin_lock(&mp->m_sb_lock); 754 mp->m_sb.sb_qflags = oldsbqflag; 755 spin_unlock(&mp->m_sb_lock); 756 } 757 *qoffstartp = qoffi; 758 return (error); 759 } 760 761 762 /* 763 * Translate an internal style on-disk-dquot to the exportable format. 764 * The main differences are that the counters/limits are all in Basic 765 * Blocks (BBs) instead of the internal FSBs, and all on-disk data has 766 * to be converted to the native endianness. 767 */ 768 STATIC void 769 xfs_qm_export_dquot( 770 xfs_mount_t *mp, 771 xfs_disk_dquot_t *src, 772 struct fs_disk_quota *dst) 773 { 774 memset(dst, 0, sizeof(*dst)); 775 dst->d_version = FS_DQUOT_VERSION; /* different from src->d_version */ 776 dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags); 777 dst->d_id = be32_to_cpu(src->d_id); 778 dst->d_blk_hardlimit = 779 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit)); 780 dst->d_blk_softlimit = 781 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit)); 782 dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit); 783 dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit); 784 dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount)); 785 dst->d_icount = be64_to_cpu(src->d_icount); 786 dst->d_btimer = be32_to_cpu(src->d_btimer); 787 dst->d_itimer = be32_to_cpu(src->d_itimer); 788 dst->d_iwarns = be16_to_cpu(src->d_iwarns); 789 dst->d_bwarns = be16_to_cpu(src->d_bwarns); 790 dst->d_rtb_hardlimit = 791 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit)); 792 dst->d_rtb_softlimit = 793 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit)); 794 dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount)); 795 dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer); 796 dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns); 797 798 /* 799 * Internally, we don't reset all the timers when quota enforcement 800 * gets turned off. No need to confuse the user level code, 801 * so return zeroes in that case. 802 */ 803 if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) || 804 (!XFS_IS_OQUOTA_ENFORCED(mp) && 805 (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) { 806 dst->d_btimer = 0; 807 dst->d_itimer = 0; 808 dst->d_rtbtimer = 0; 809 } 810 811 #ifdef DEBUG 812 if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) || 813 (XFS_IS_OQUOTA_ENFORCED(mp) && 814 (dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) && 815 dst->d_id != 0) { 816 if (((int) dst->d_bcount > (int) dst->d_blk_softlimit) && 817 (dst->d_blk_softlimit > 0)) { 818 ASSERT(dst->d_btimer != 0); 819 } 820 if (((int) dst->d_icount > (int) dst->d_ino_softlimit) && 821 (dst->d_ino_softlimit > 0)) { 822 ASSERT(dst->d_itimer != 0); 823 } 824 } 825 #endif 826 } 827 828 STATIC uint 829 xfs_qm_export_qtype_flags( 830 uint flags) 831 { 832 /* 833 * Can't be more than one, or none. 834 */ 835 ASSERT((flags & (FS_PROJ_QUOTA | FS_USER_QUOTA)) != 836 (FS_PROJ_QUOTA | FS_USER_QUOTA)); 837 ASSERT((flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)) != 838 (FS_PROJ_QUOTA | FS_GROUP_QUOTA)); 839 ASSERT((flags & (FS_USER_QUOTA | FS_GROUP_QUOTA)) != 840 (FS_USER_QUOTA | FS_GROUP_QUOTA)); 841 ASSERT((flags & (FS_PROJ_QUOTA|FS_USER_QUOTA|FS_GROUP_QUOTA)) != 0); 842 843 return (flags & XFS_DQ_USER) ? 844 FS_USER_QUOTA : (flags & XFS_DQ_PROJ) ? 845 FS_PROJ_QUOTA : FS_GROUP_QUOTA; 846 } 847 848 STATIC uint 849 xfs_qm_export_flags( 850 uint flags) 851 { 852 uint uflags; 853 854 uflags = 0; 855 if (flags & XFS_UQUOTA_ACCT) 856 uflags |= FS_QUOTA_UDQ_ACCT; 857 if (flags & XFS_PQUOTA_ACCT) 858 uflags |= FS_QUOTA_PDQ_ACCT; 859 if (flags & XFS_GQUOTA_ACCT) 860 uflags |= FS_QUOTA_GDQ_ACCT; 861 if (flags & XFS_UQUOTA_ENFD) 862 uflags |= FS_QUOTA_UDQ_ENFD; 863 if (flags & (XFS_OQUOTA_ENFD)) { 864 uflags |= (flags & XFS_GQUOTA_ACCT) ? 865 FS_QUOTA_GDQ_ENFD : FS_QUOTA_PDQ_ENFD; 866 } 867 return (uflags); 868 } 869 870 871 STATIC int 872 xfs_dqrele_inode( 873 struct xfs_inode *ip, 874 struct xfs_perag *pag, 875 int flags) 876 { 877 /* skip quota inodes */ 878 if (ip == ip->i_mount->m_quotainfo->qi_uquotaip || 879 ip == ip->i_mount->m_quotainfo->qi_gquotaip) { 880 ASSERT(ip->i_udquot == NULL); 881 ASSERT(ip->i_gdquot == NULL); 882 return 0; 883 } 884 885 xfs_ilock(ip, XFS_ILOCK_EXCL); 886 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) { 887 xfs_qm_dqrele(ip->i_udquot); 888 ip->i_udquot = NULL; 889 } 890 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) { 891 xfs_qm_dqrele(ip->i_gdquot); 892 ip->i_gdquot = NULL; 893 } 894 xfs_iunlock(ip, XFS_ILOCK_EXCL); 895 return 0; 896 } 897 898 899 /* 900 * Go thru all the inodes in the file system, releasing their dquots. 901 * 902 * Note that the mount structure gets modified to indicate that quotas are off 903 * AFTER this, in the case of quotaoff. 904 */ 905 void 906 xfs_qm_dqrele_all_inodes( 907 struct xfs_mount *mp, 908 uint flags) 909 { 910 ASSERT(mp->m_quotainfo); 911 xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags); 912 } 913